Food processing machinery - Mincing machines - Safety and hygiene requirements

1.1   This documentd specifies requirements for the design and manufacture of mincing machines (see Figures 1 a and 1 b).
The mincing machines (hereinafter referred to as machine) covered by this document are used for size reduction of fresh or frozen meat, meat products and fish (hereinafter referred to as product) by cutting in a set of cutting tools.
Machines for domestic uses are not included in this document. Filling mincers are covered by EN 12463 "Food processing machinery - Filling machines and auxiliary machines - Safety and hygiene requirements".
This document applies only to machines that are manufactured after the date of issue of this document.
This document covers:
-   professional machines used for on-demand preparation in shops characterized by:
-   designed as a table top machine;
-   and having a feed tray;
-   and the product is only feed manually;
-   and is only operated from the ground;
-   and is operated by no more than one operator;
-   and with full visibility and full accessibility of the entire machine from the operator workstation;
-   and having hole plate diameter ≤ 106 mm;
-   and a worm casing set which is removable without using any tools;
-   and the weight of the worm casing set ≤ 15 kg;
NOTE   The table top machine can be equipped with a frame or base, so no separate table is needed.
-   industrial machines used for industrial mass production, and which cannot be characterized as a professional machine.
The extent to which hazards are covered, is indicated in this document. For other hazards which are not covered by this document, machinery should comply with EN ISO 12100:2010 where applicable.
This document does not describe the specific requirements for the control of machines with foot switch.
This document does not describe the specific requirements for additional mixing screws in the feed intake hopper which are covered by EN 13570 "Food processing machinery - Mixing machines - Safety and hygiene requirements".
1.2   This document covers the following types of machines:
-   machine with feed tray, feed intake and pusher (see Figure 3);
-   machine with feed tray, feed intake, restrictor plate and pusher (see Figure 4);
-   machine with feed intake hopper, cover and screw conveyor (see Figure 5);
-   machine with feed intake hopper, with or without cover, screw conveyor, with loading device (continuously or discontinuously).
Machines comprise a machine base, a worm casing with a worm, a feed tray (with feed intake) or a feed intake hopper, a screw conveyor, a set of cutting tools, a lock nut, a loading device, a drive motor and - depending on machine type - electrical, hydraulic and pneumatic components. They will also have various safeguarding devices as examples in Clause 5.
(...)
Machines may be equipped e.g. with:
-   an extraction claw;
-   an ejector or extractor;
-   a protective hood over the discharge outlet;
-   a cover over the inlet opening of the feed intake hopper;
-   a transport carriage for the lock nut, the set of cutting tools, the worm and the screw conveyor;
-   a lifting device for the lock nut, the set of cutting tools, the worm and the screw conveyor;
-   a loading device.
1.3   Intended use
The product is fed manually or with a loading device into the mincing machine. The product is fed to the worm either by a pusher or a screw conveyor and reduced in size by a set of cutting tools.
It is foreseeable that industrial machines will be cleaned with pressurized water, so the requirements of 5.3.4 shall apply to all industrial machines in the scope of this standard. This is not applicable to professional machines.
This document specifies all significant hazards, hazardous situations and events relevant to machines, when they are used as intended and under conditions of misuse which are reasonably foreseeable by the manufacturer (see Clause 4).
(...)

Nahrungsmittelmashinen - Wölfe - Sicherheits- und Hygieneanforderungen

1.1   Dieses Dokument legt Anforderungen an die Konstruktion und Herstellung von Wölfen (siehe Bilder 1 a und 1 b) fest.
Die von diesem Dokument erfassten Wölfe (nachfolgend als Maschinen bezeichnet) werden für die Zerkleinerung von frischem oder gefrorenem Fleisch, Fleischprodukten und Fisch (nachfolgend als Produkt bezeichnet) durch Zerschneiden in einem Schneidsatz verwendet.
Maschinen für den Hausgebrauch werden von diesem Dokument nicht erfasst. Füllwölfe werden in EN 12463 "Nahrungsmittelmaschinen - Füllmaschinen und Vorsatzmaschinen - Sicherheits- und Hygieneanforderungen" behandelt.
Dieses Dokument gilt nur für Maschinen, die nach dem Ausgabedatum dieser Europäischen Norm hergestellt werden.
Dieses Dokument behandelt:
-   professionelle Maschinen, die in Läden für die Herstellung nach Bedarf verwendet werden, die sich folgendermaßen charakterisieren lassen:
-   konstruiert als Tischmaschine;
-   mit Einfüllschale;
-   in die das Produkt nur manuell eingebracht wird;
-   die nur vom Boden aus betrieben werden;
-   die von nicht mehr als einem Bediener betrieben werden;
-   gleichzeitig kann die Maschine vom Arbeitsbereich des Bedieners vollständig eingesehen werden und ist vollständig zugänglich;
-   hat einen Lochscheibendurchmesser ≤ 106 mm;
-   und einen Schneckengehäusesatz, der ohne Einsatz von Werkzeugen ausbaubar ist;
-   der Gewichtswert des Schneckengehäuses liegt bei ≤ 15 kg;
ANMERKUNG   Die Tischmaschine kann mit einem Rahmen oder einem Sockel ausgestattet sein, sodass kein separater Tisch erforderlich ist.
-   industrielle Maschinen, die für industrielle Massenherstellung eingesetzt werden und die sich nicht als professionelle Maschine charakterisieren lassen.
In welchem Maße Gefährdungen erfasst sind, wird in diesem Dokument angegeben. Bei anderen Gefährdungen, die nicht in diesem Dokument behandelt werden, sollten die Maschinen, sofern zutreffend, EN ISO 12100:2010 entsprechen.
Dieses Dokument beschreibt keine speziellen Anforderungen an die Steuerung von Maschinen mittels Fußschalter.
Dieses Dokument beschreibt keine speziellen Anforderungen an zusätzliche Mengwellen im Einfülltrog, da diese von EN 13570 "Nahrungsmittelmaschinen - Mischmaschinen - Sicherheits- und Hygieneanforderungen" behandelt werden.
1.2   Dieses Dokument umfasst die folgenden Maschinentypen:
-   Maschine mit Einfüllschale, Einfüllschacht und Stopfer, (siehe Bild 3);
-   Maschine mit Einfüllschale, Einfüllschacht, Schutzplatte und Stopfer, (siehe Bild 4);
-   Maschine mit Einfülltrog, Deckel und Transportschnecke (siehe Bild 5);
-   Maschine mit Einfülltrog, mit oder ohne Deckel, Transportschnecke, mit Beladeeinrichtung (kontinuierlich oder diskontinuierlich).
Maschinen bestehen aus einem Maschinenständer, einem Schneckengehäuse mit Arbeitsschnecke, einer Einfüllschale (mit Einfüllschacht) oder einem Einfülltrog, einer Transportschnecke, einem Schneidsatz, einer Verschlussmutter, einer Beschickungseinrichtung, einem Antriebsmotor und - abhängig von der Maschinenart - aus elektrischen, hydraulischen und pneumatischen Elementen. Sie besitzen auch verschiedene Schutzeinrichtungen, wie in Abschnitt 5 beispielhaft erläutert.
(...)
Maschinen können ausgerüstet sein z. B. mit:
-   einer Ausziehklaue;
-   einer Ausstoß- oder Auszieheinrichtung;
-   einer Schutzhaube am Auslauf;
-   einem Deckel über der Einlauföffnung des Einfülltrogs;
-   einem Transportwagen für Verschlussmutter, Schneidsatz, Arbeitsschnecke und Transportschnecke;
-   einer Hebeeinrichtung für Verschlussmutter, Schneidsatz, Arbeitsschnecke und Transportschnecke;
-   einer Beladeeinrichtung.
1.3   Bestimmungsgemäßer Gebrauch
Das Produkt wird von Hand oder durch die Beladeeinrichtung in den Wolf eingefüllt. Das Produkt wird der Arbeitsschnecke entweder durch einen Stopfer oder eine Transportschnecke zugeführt und im Schneidsatz zerkleinert.
(...)

Machines pour les produits alimentaires - Hachoirs - Prescriptions relatives à la sécurité et l'hygiène

1.1   Le présent document spécifie les prescriptions relatives à la conception et à la fabrication des hachoirs (voir Figures 1 a et 1 b).
Les hachoirs (ci-après désignés « machines ») couverts par le présent document sont utilisées pour hacher de la viande fraîche ou congelée, des produits à base de viande et du poisson (ci-après désignés « produit »), la coupe étant effectuée dans un jeu d’outils de coupe.
Les machines à usage domestique ne sont pas couvertes par le présent document. Les poussoirs sont couverts par l’EN 12463 « Machines pour les produits alimentaires - Machines à pousser et machines auxiliaires - Prescriptions relatives à la sécurité et à l’hygiène ».
Le présent document ne s’applique qu’aux machines fabriquées après sa date de publication.
Le présent document traite des :
-   machines professionnelles utilisées pour la préparation à la demande dans les magasins caractérisées par :
-   conçues comme machines de table ;
-   et étant équipées d’un plateau d'alimentation ;
-   et le produit est uniquement chargé manuellement ;
-   et étant uniquement utilisées au sol ;
-   et n’étant pas exploitées par plus d’un opérateur ;
-   et avec une visibilité totale et une accessibilité totale de l'ensemble de la machine depuis le poste de travail de l'opérateur ;
-   et dont le diamètre de la plaque perforée ≤ 106 mm ;
-   et un corps de hachoir qui est amovible sans outil ;
-   et le poids du corps de hachoir ≤ 15 kg ;
NOTE   La machine de table peut être équipée d'un bâti ou d'un socle, de sorte qu'aucune table séparée n'est nécessaire.
-   les machines industrielles utilisées pour la production industrielle de masse, et qui ne peuvent pas être qualifiées de machines professionnelles.
L'étendue des phénomènes dangereux couverts est indiquée dans le présent document. Pour les autres phénomènes dangereux qui ne sont pas couverts par le présent document, il convient que les machines soient conformes à l'EN ISO 12100:2010, le cas échéant.
Le présent document ne décrit pas les prescriptions spécifiques pour la commande des machines utilisant un interrupteur à pied.
Le présent document ne décrit pas les prescriptions spécifiques pour les vis mélangeuses supplémentaires dans la trémie d'alimentation qui sont couvertes par l’EN 13570 "Machines pour les produits alimentaires - Malaxeurs - Prescriptions relatives à la sécurité et à l'hygiène".
1.2   Le présent document couvre les types de machines suivants :
-   machine avec plateau d'alimentation, goulotte d'alimentation et poussoir (voir Figure 3) ;
-   machine avec plateau d'alimentation, goulotte d'alimentation, plaque protectrice et poussoir (voir Figure 4) ;
-   machine avec trémie d'alimentation, couvercle et hélice transporteuse (voir Figure 5) ;
-   machine avec trémie d'alimentation, avec ou sans couvercle, hélice transporteuse, avec dispositif de chargement (en continu ou discontinu).
Les machines comprennent un socle, un corps de hachoir avec vis d'acheminement, un plateau d'alimentation (avec goulotte d'alimentation) ou une trémie d'alimentation, une hélice transporteuse, un jeu d’outils de coupe, un écrou de corps, un dispositif de chargement, un moteur d'entraînement et, suivant le type de machine, des composants électriques, hydrauliques et pneumatiques. Ils comprennent également plusieurs dispositifs de sécurité donnés en exemple à l’Article 5.
(...)
Les machines peuvent être équipées de, par exemple :
-   un système d'extraction ;
-   un éjecteur ou un extracteur ;
-   un capot protecteur à la sortie ;
-   un couvercle sur l'ouverture de la trémie d'alimentation ;
-   un chariot de transport pour l'écrou de corps, le jeu d’outils de coupe, la vis d'acheminement et l'hélice transporteuse ;
-   un dispositif de levage pour l'écrou de corps, le jeu d’outils de coupe, la vis d'acheminement et l'hélice transporteuse ;
(....)

Stroji za predelavo hrane - Stroji za mletje mesa - Varnostne in higienske zahteve

General Information

Status
Published
Public Enquiry End Date
19-Oct-2018
Publication Date
06-Sep-2021
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
19-Aug-2021
Due Date
24-Oct-2021
Completion Date
07-Sep-2021

RELATIONS

Buy Standard

Standard
SIST EN 12331:2021 - BARVE na PDF-str 41
English language
53 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day
Draft
oSIST prEN 12331:2018
English language
43 pages
sale 10% off
Preview
sale 10% off
Preview
e-Library read for
1 day

Standards Content (sample)

SLOVENSKI STANDARD
SIST EN 12331:2021
01-november-2021
Nadomešča:
SIST EN 12331:2015

Stroji za predelavo hrane - Stroji za mletje mesa - Varnostne in higienske zahteve

Food processing machinery - Mincing machines - Safety and hygiene requirements
Nahrungsmittelmashinen - Wölfe - Sicherheits- und Hygieneanforderungen

Machines pour les produits alimentaires - Hachoirs - Prescriptions relatives à la sécurité

et l'hygiène
Ta slovenski standard je istoveten z: EN 12331:2021
ICS:
67.260 Tovarne in oprema za živilsko Plants and equipment for the
industrijo food industry
SIST EN 12331:2021 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
SIST EN 12331:2021
---------------------- Page: 2 ----------------------
SIST EN 12331:2021
EN 12331
EUROPEAN STANDARD
NORME EUROPÉENNE
August 2021
EUROPÄISCHE NORM
ICS 67.260 Supersedes EN 12331:2015
English Version
Food processing machinery - Mincing machines - Safety
and hygiene requirements

Machines pour les produits alimentaires - Hachoirs - Nahrungsmittelmaschinen - Wölfe - Sicherheits- und

Prescriptions relatives à la sécurité et l'hygiène Hygieneanforderungen
This European Standard was approved by CEN on 23 May 2021.

CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this

European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references

concerning such national standards may be obtained on application to the CEN-CENELEC Management Centre or to any CEN

member.

This European Standard exists in three official versions (English, French, German). A version in any other language made by

translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC Management

Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,

Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and

United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2021 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12331:2021 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
SIST EN 12331:2021
EN 12331:2021 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 8

3 Terms and definitions ................................................................................................................................... 9

4 Safety requirements and/or measures ................................................................................................ 13

4.1 General ............................................................................................................................................................. 13

4.2 Mechanical safety ......................................................................................................................................... 13

4.3 Electrical hazards ......................................................................................................................................... 27

4.4 Stability of the machine ............................................................................................................................. 29

4.5 Noise reduction ............................................................................................................................................. 30

4.6 Hazards from use of gases (N2, CO2 and steam) ................................................................................. 31

4.7 Ergonomic requirements .......................................................................................................................... 31

4.8 Hygiene and cleaning .................................................................................................................................. 32

5 Verification of safety requirements and/or measures ................................................................... 34

6 Information for use ..................................................................................................................................... 36

6.1 General ............................................................................................................................................................. 36

6.2 Operating instructions ............................................................................................................................... 36

6.3 Marking ............................................................................................................................................................ 38

Annex A (normative) Noise test code for mincing machines (grade 2) ................................................. 40

A.1 Emission sound pressure level determination ................................................................................. 40

A.2 Determination of the sound power level ............................................................................................. 40

A.3 Installation and mounting conditions .................................................................................................. 40

A.4 Operating conditions .................................................................................................................................. 40

A.5 Measurement ................................................................................................................................................. 41

A.6 Information to be recorded ...................................................................................................................... 41

A.7 Information to be reported ...................................................................................................................... 41

A.8 Measurement uncertainty ........................................................................................................................ 42

A.9 Declaration and verification of the noise emission values ........................................................... 42

Annex B (normative) Design principles to ensure cleanability of mincing machines ..................... 44

B.1 Definition ........................................................................................................................................................ 44

B.2 Materials .......................................................................................................................................................... 44

B.3 Design ............................................................................................................................................................... 44

Annex C (informative) Performance level required ..................................................................................... 49

Annex D (informative) List of significant hazards ......................................................................................... 50

---------------------- Page: 4 ----------------------
SIST EN 12331:2021
EN 12331:2021 (E)

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2006/42/EC aimed to be covered ...................................................... 51

Bibliography ................................................................................................................................................................. 53

---------------------- Page: 5 ----------------------
SIST EN 12331:2021
EN 12331:2021 (E)
European foreword

This document (EN 12331:2021) has been prepared by Technical Committee CEN/TC 153 “Machinery

intended for use with foodstuffs and feed”, the secretariat of which is held by DIN.

This European Standard shall be given the status of a national standard, either by publication of an

identical text or by endorsement, at the latest by February 2022 and conflicting national standards shall

be withdrawn at the latest by February 2022.

Attention is drawn to the possibility that some of the elements of this document may be the subject of

patent rights. CEN shall not be held responsible for identifying any or all such patent rights.

This document supersedes EN 12331:2015.

This document has been prepared under a Standardization Request given to CEN by the European

Commission and the European Free Trade Association, and supports essential requirements of

EU Directive(s) / Regulation(s).

For relationship with EU Directive(s) / Regulation(s), see informative Annex ZA, which is an integral part

of this document.

The significant changes with respect to the previous edition EN 12331:2015 are listed below:

— for better distinction, two types of mincing machines are defined: professional and industrial;

— the requirements have been specified and revised with regard to the two types of mincing machine

(professional and industrial).

Any feedback and questions on this document should be directed to the users’ national standards body.

A complete listing of these bodies can be found on the CEN website.

According to the CEN-CENELEC Internal Regulations, the national standards organizations of the

following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia,

Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland,

Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of North

Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United

Kingdom.
---------------------- Page: 6 ----------------------
SIST EN 12331:2021
EN 12331:2021 (E)
Introduction
This document is a type-C-standard as stated in EN ISO 12100.

This document is of relevance, in particular for the following stakeholder groups representing the market

players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);

— health and safety bodies (regulators, accident prevention organizations, market surveillance, etc.).

Others can be affected by the level of machinery safety achieved with the means of the document by the

above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);

— machine users/employees (e.g. trade unions, organizations for people with special needs);

— service providers, e.g. for maintenance (small, medium and large enterprises);
— consumers (in the case of machinery intended for use by consumers).

The above-mentioned stakeholder groups have been given the possibility to participate at the drafting

process of this document.

The machinery concerned and the extent to which hazards, hazardous situations and hazardous events

are covered are indicated in the scope of this document.

When provisions of this type-C-standard are different from those which are stated in type-A- or -B-

standards, the provisions of this type-C-standard take precedence over the provisions of the other

standards, for machines that have been designed and built according to the provisions of this type-C-

standard.
---------------------- Page: 7 ----------------------
SIST EN 12331:2021
EN 12331:2021 (E)
1 Scope

This document specifies requirements for the design and manufacture of mincing machines (see

Figure 1).

The mincing machines (hereinafter referred to as machine) covered by this document are used for size

reduction of fresh or frozen meat, meat products and fish (hereinafter referred to as product) by cutting

in a set of cutting tools.

Household machines are not included in this document. Filling mincers are covered by EN 12463 “Food

processing machinery — Filling machines and auxiliary machines — Safety and hygiene requirements”.

This document applies only to machines that are manufactured after the date of issue of this document.

This document covers:

a) professional machines (see Figure 1 a) used for on-demand preparation in shops and/or restaurants

characterized by all of the following features (if any of the features is missing the machine is

considered an industrial machine):
1) designed as a table-top machine;
2) having a feed tray;
3) the product is only fed manually;
4) is only operated from the ground;
5) is operated by no more than one operator;

6) with full visibility and full accessibility of the entire machine from the operator workstation;

7) having hole plate diameter ≤ 106 mm;
8) a worm casing set which is removable without using any tools;
9) the weight of the worm casing set ≤ 15 kg;

NOTE The table-top machine can be equipped with a frame or base, so no separate table is needed.

b) industrial machines (see Figure 1 b) used for industrial mass production, and which cannot be

characterized as a professional machine.

This document does not describe the specific requirements for the control of machines with foot switch.

This document does not describe the specific requirements for additional mixing screws in the feed intake

hopper which are covered by EN 13570:2005+A1:2010 “Food processing machinery — Mixing machines

— Safety and hygiene requirements”.
---------------------- Page: 8 ----------------------
SIST EN 12331:2021
EN 12331:2021 (E)

a) Professional machine with feed tray and b) Industrial machine with feed intake hopper,

restrictor plate protective cover and feeding screw
Key
1 lock nut 6 feed intake 11 feed intake hopper 16 protective hood
2 hole plate 7 pusher 12 feeding screw 17 worm
3 blade 8 restrictor plate 13 protective cover 18 machine rack
4 worm 9 feed tray 14 on-/off-switch with 19 loading device
protective hood
5 worm casing 10 on-/off-switch 15 lock nut 20 floor
21 table 22 table-top
Figure 1 — Examples of machines
This document covers the following types of machines:
— machine with feed tray, feed intake and pusher (see Figure 3);

— machine with feed tray, feed intake, restrictor plate and pusher (see Figure 4);

— machine with feed intake hopper, protective cover and feeding screw (see Figure 6);

— machine with feed intake hopper, with or without protective cover, feeding screw, with loading

device (continuously or discontinuously).

Machines comprise a machine base, a worm casing with a worm, a feed tray (with feed intake) or a feed

intake hopper, a set of cutting tools, a lock nut, a drive motor. They will also have various safeguarding

devices as examples in Clause 4.
Machines can be equipped e.g. with:
— an extraction claw;
— an ejector or extractor;
— a protective hood over the discharge outlet;
— a protective cover over the inlet opening of the feed intake hopper;
---------------------- Page: 9 ----------------------
SIST EN 12331:2021
EN 12331:2021 (E)

— a transport carriage for the lock nut, the set of cutting tools, the worm and the feeding screw;

— a lifting device for the lock nut, the set of cutting tools, the worm and the feeding screw;

— a loading device.

The product is fed manually or with a loading device into the machine. The product is fed to the worm

either by a pusher or a feeding screw and reduced in size by a set of cutting tools.

This document specifies all significant hazards, hazardous situations and events relevant to machines,

when they are used as intended and under conditions of misuse which are reasonably foreseeable by the

manufacturer (see Annex D).

This document specifies the hazards which can arise during commissioning, operation, cleaning, use,

maintenance and decommissioning of the machine.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 614-1:2006+A1:2009, Safety of machinery — Ergonomic design principles — Part 1: Terminology and

general principles

EN 1005-1:2001+A1:2008, Safety of machinery — Human physical performance — Part 1: Terms and

definitions

EN 1005-2:2003+A1:2008, Safety of machinery — Human physical performance — Part 2: Manual

handling of machinery and component parts of machinery

EN 1005-3:2002+A1:2008, Safety of machinery — Human physical performance — Part 3: Recommended

force limits for machinery operation

EN 1672-2:2005+A1:2009, Food processing machinery — Basic concepts — Part 2: Hygiene requirements

EN 60204-1:2018, Safety of machinery — Electrical equipment of machines — Part 1: General

requirements (IEC 60204-1:2016, modified)

EN 60529:1991 , Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)

EN 61496-1:2013, Safety of machinery — Electro-sensitive protective equipment — Part 1: General

requirements and tests (IEC 61496-1:2012)

EN ISO 3744:2010, Acoustics — Determination of sound power levels and sound energy levels of noise

sources using sound pressure — Engineering methods for an essentially free field over a reflecting plane

(ISO 3744:2010)
1) As impacted by EN 60529:1991/A1:2000 and EN 60529:1991/A2:2013.
---------------------- Page: 10 ----------------------
SIST EN 12331:2021
EN 12331:2021 (E)

EN ISO 3746:2010, Acoustics — Determination of sound power levels and sound energy levels of noise

sources using sound pressure — Survey method using an enveloping measurement surface over a reflecting

plane (ISO 3746:2010)

EN ISO 4287:1998 , Geometrical product specifications (GPS) — Surface texture: Profile method — Terms,

definitions and surface texture parameters (ISO 4287:1997)

EN ISO 4871:2009, Acoustics — Declaration and verification of noise emission values of machinery and

equipment (ISO 4871:1996)

EN ISO 7010:2020, Graphical symbols — Safety colours and safety signs — Registered safety signs

(ISO 7010:2019, Corrected version 2020-06)

EN ISO 11201:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission

sound pressure levels at a work station and at other specified positions in an essentially free field over a

reflecting plane with negligible environmental corrections (ISO 11201:2010)

EN ISO 11202:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission

sound pressure levels at a workstation and at other specified positions applying approximate environmental

corrections (ISO 11202:2010)

EN ISO 11688-1:2009, Acoustics — Recommended practice for the design of low-noise machinery and

equipment — Part 1: Planning (ISO/TR 11688-1:1995)

EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk

reduction (ISO 12100:2010)

EN ISO 13849-1:2015, Safety of machinery — Safety-related parts of control systems — Part 1: General

principles for design (ISO 13849-1:2015)

EN ISO 13854:2019, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body

(ISO 13854:2017)

EN ISO 13857:2019, Safety of machinery — Safety distances to prevent hazard zones being reached by

upper and lower limbs (ISO 13857:2019)

EN ISO 14119:2013, Safety of machinery — Interlocking devices associated with guards — Principles for

design and selection (ISO 14119:2013)

EN ISO 14120:2015, Safety of machinery — Guards — General requirements for the design and

construction of fixed and movable guards (ISO 14120:2015)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN ISO 12100:2010 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— ISO Online browsing platform: available at https://www.iso.org/obp
— IEC Electropedia: available at http://www.electropedia.org/
2) As impacted by EN ISO 4287:1998/AC:2008 and EN ISO 4287:1998/A1:2009.
---------------------- Page: 11 ----------------------
SIST EN 12331:2021
EN 12331:2021 (E)
3.1
platform
accessible workstation
3.2
worm

rotating screw-shaped component in the worm casing for product transport to the set of cutting tools

3.3
ejector/extractor
device for detaching the set of cutting tools and the worm
3.4
extraction claw
tool for detaching the set of cutting tools and the worm
3.5
loading device
device for the lifting and tilting of transport cars and containers
3.6
container
device for holding processed and/or unprocessed product
3.7
protective cover
device with safety function
3.8
feed intake
housing between the feed tray and the worm casing
3.9
feed intake hopper
device for holding the unprocessed product
3.10
locking device
device for locking the trolley or container in the load bearing device
3.11
trolley
movable container
3.12
design dimension

sum of dimensions measured as tight string length from the workstation (floor, steps, intermediate steps

or platforms) to the hopper edge (inclusively additional safety measures) and from the hopper edge

(inclusively additional safety measures) to the first danger point in the feed intake hopper (see Figure 7

and Figure 8)
3.13
cooling mincer
machine with a cooling device for the feed intake and the worm casing
---------------------- Page: 12 ----------------------
SIST EN 12331:2021
EN 12331:2021 (E)
3.14
workstation
every location at the machine from which the operator interacts with the machine
3.15
hole plate
plate with bores
Note 1 to entry: A hole plate is shown in Figure 1 a).
3.16
end hole plate
last hole plate towards the outlet
3.17
blade
element for cutting the product
3.18
feed tray
device for receiving the product to be processed to feed the feed intake by hand
3.19
mechanical trip bar
movable device with a safety function
3.20
worm casing
element for holding the worm and the set of cutting tools
3.21
worm casing set

arrangement consisting of a worm casing, a worm, a set of cutting tools and a lock nut

3.22
set of cutting tools
arrangement of blades and hole plates for size reduction of product

Note 1 to entry: The number and type of cutting tools used is selected depending on the desired quality of the

minced product.
3.23
protective grid
device on the feed intake hopper mouth with a safety function
3.24
protective hood
device on the discharge outlet with a safety function
3.25
restrictor plate
device above the feed intake
---------------------- Page: 13 ----------------------
SIST EN 12331:2021
EN 12331:2021 (E)
3.26
pusher
device used to push the product further in the feed intake
3.27
feeding screw

rotating screw-shaped component in the feed intake hopper for product transport to the worm

3.28
transport carriage

movable device for holding the lock nut, set of cutting tools, worm and feeding screw

3.29
lock nut
device for locking the set of cutting tools in the worm casing
3.30
professional machine
machine used for on-demand preparation in shops or restaurants

Note 1 to entry: A professional machines used for on-demand preparation in shops and/or restaurants is

characterized by all of the following features (if any of the features is missing the machine is considered an industrial

machine):
— designed as a table-top machine;
— having a feed tray;
— the product is only feed manually;
— is only operated from the ground;
— is operated by no more than one operator;

— with full visibility and full accessibility of the entire machine from the operator workstation;

— having hole plate diameter ≤ 106 mm;
— a worm casing set which is removable without using any tools;
— the weight of the worm casing set ≤ 15 kg.

Note 2 to entry: The table-top machine can be equipped with a frame or base, so no separate table is needed.

3.31
industrial machine

machine used for industrial mass production or which cannot be characterized as a professional machine

3.32
easily cleanable

designed and constructed to be cleanable by a simple cleaning methode, where necessary after removing

easily dismantled parts
---------------------- Page: 14 ----------------------
SIST EN 12331:2021
EN 12331:2021 (E)
4 Safety requirements and/or measures
4.1 General

Machinery shall comply with the safety requirements and/or protective measures of this clause. In

addition, the machine shall be designed according to the principles of EN ISO 12100:2010 for relevant,

but not significant hazards which are not dealt with by this document.

Where the means of reducing the risk is by the arrangement or positioning of the installed machine, the

manufacturer shall include in the Information for use a reference to the reduction means to be provided,

and to any limiting value of the requirement, and, if appropriate, to the means of verification.

Where the means of reducing the risk is by a safe system of work, the manufacturer shall include in the

information for use details of the system and of the elements of training required by the operating

personnel.

Machine safety functions are implemented and assured through Safety-Related Parts of the Control

System (SRP/CS) that shall achieve a required Performance Level (PL ). This requirement is given for

each safety function in the relevant subclauses of Clause 4. Table C.1 summarizes PL for each safety

function; however, the provisions of Clause 4 remain the sole and complete normative set of

requirements and explanations.
Figure 2 shows the significant hazard zones of machines.
a) Machine with feed intake b) Machine with feed intake hopper
Key
1 zone 1 4 zone 4 7 zone 7
2 zone 2 5 zone 5 8 zone 8
3 zone 3 6 zone 6 9 zone 9
10 zone 10
Figure 2 — Hazard zones
4.2 Mechanical safety
4.2.1 General

The machines shall be designed and constructed in accordance with the conditions mentioned below.

The interlocking systems of guards shall comply with EN ISO 14119:2013, 4.2, and the safety-related

parts of the control system shall comply with EN ISO 13849-1:2015.
---------------------- Page: 15 ----------------------
SIST EN 12331:2021
EN 12331:2021 (E)

In addition, interlocking systems shall be designed to comply with the following features:

— fulfil hygienic requirements;
— protected against mechanical damages;
— protected against the effects of cleaning and disinfecting materials;
— protected against the effects of cleaning fluids (water);
— not be easy to by-pass or render non-operational;

— be contained in the machine casing and comply with EN ISO 14119:2013, 7.2 a) 1).

The manufacturer shall indicate in the instruction handbook that the interlocking device shall be checked

every day (see 6.2 d)). Fixing systems of fixed guards shall remain attached to these guards or to the

machine when the guards are removed.
4.2.2 Zone 1 – Requirements for machines with feed intake and worm

Access to the worm in the feed intake shall be prevented, e.g. by the following measures:

1) On machines with diameter of feed intake D ≤ 52 mm (see Figure 3), the distance L between the upper

feed intake edge and the worm shall be:
a) L ≥ 100 mm on machines with diameter of feed intake D ≤ 46 mm;
b) L ≥ 120 mm on machines with diameter of feed intake 46 mm < D ≤ 52 mm.
a) Fixed feed tray b) Removable feed tray c) Removable feed tray
Key
D inlet diameter of feed intake
L distance from inlet of feed intake to worm
1 feed tray
2 feed intake
3 worm
Where the inlet is not a circle, D shall be considered as the maximum dimension.
Figure 3 — Feed intake without restrictor plate – Safety dimensions
---------------------- Page: 16 ----------------------
SIST EN 12331:2021
EN 12331:2021 (E)

2) On machines with a diameter of feed intake D > 52mm, a restrictor plate (see Figure 4) shall be

provided by the following measures:

a) the restrictor plate shall be provided with an interlocking device unless it is permanentally fixed

(e.g. by welding; a fixation by means of screws is not regarded as permanent);

b) when a force between the mass of the machine and ≤ 150 N is applied in any position and any

direction on the restrictor plate, the restrictor plate shall not permanentally raise the distance S

more than 2 mm if the requirements of Table 1 are met;
c) the inlet of the restrictor plate shall have a diameter C ≤ 52 mm;

d) the horizontal distance from outer edge of restrictor plate to feed intake edge shall be E ≥ 40 mm;

e) the dimensions S, L, L and L and the arrangement of the restrictor plate shall be in accordance

1 2
with Figure 4 and Table 1;
...

SLOVENSKI STANDARD
oSIST prEN 12331:2018
01-oktober-2018

Stroji za predelavo hrane - Stroji za mletje mesa - Varnostne in higienske zahteve

Food processing machinery - Mincing machines - Safety and hygiene requirements
Nahrungsmittelmashinen - Wölfe - Sicherheits- und Hygieneanforderungen

Machines pour les produits alimentaires - Hachoirs - Prescriptions relatives à la sécurité

et l'hygiène
Ta slovenski standard je istoveten z: prEN 12331
ICS:
67.260 Tovarne in oprema za Plants and equipment for the
živilsko industrijo food industry
oSIST prEN 12331:2018 en,fr,de

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------
oSIST prEN 12331:2018
---------------------- Page: 2 ----------------------
oSIST prEN 12331:2018
DRAFT
EUROPEAN STANDARD
prEN 12331
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2018
ICS 67.260 Will supersede EN 12331:2015
English Version
Food processing machinery - Mincing machines - Safety
and hygiene requirements

Machines pour les produits alimentaires - Hachoirs - Nahrungsmittelmaschinen - Wölfe - Sicherheits- und

Prescriptions relatives à la sécurité et l'hygiène Hygieneanforderungen

This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee

CEN/TC 153.

If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations

which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.

This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other

language made by translation under the responsibility of a CEN member into its own language and notified to the CEN-CENELEC

Management Centre has the same status as the official versions.

CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia,

Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania,

Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,

Turkey and United Kingdom.

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are

aware and to provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without

notice and shall not be referred to as a European Standard.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels

© 2018 CEN All rights of exploitation in any form and by any means reserved Ref. No. prEN 12331:2018 E

worldwide for CEN national Members.
---------------------- Page: 3 ----------------------
oSIST prEN 12331:2018
prEN 12331:2018 (E)
Contents Page

European foreword ....................................................................................................................................................... 4

Introduction .................................................................................................................................................................... 5

1 Scope .................................................................................................................................................................... 6

2 Normative references .................................................................................................................................... 8

3 Terms and definitions ................................................................................................................................... 9

4 List of significant hazards ......................................................................................................................... 12

5 Safety requirements and/or measures ................................................................................................ 14

5.1 General ............................................................................................................................................................. 14

5.2 Mechanical safety ......................................................................................................................................... 14

5.2.1 General ............................................................................................................................................................. 14

5.2.2 Zone 1 – Requirements for machines with feed intake and worm ............................................. 15

5.2.3 Zone 2 – Requirements for machines with feed intake hopper and screw conveyor.......... 17

5.2.4 Zone 3 – Discharge outlet on machines ................................................................................................ 20

5.2.5 Zone 4 – Removal of worm casing set, worm or set of cutting tools .......................................... 21

5.2.6 Zone 5 – Drive system ................................................................................................................................. 22

5.2.7 Zone 6 – Movable machine components e.g. cover over hopper edge ...................................... 22

5.2.8 Zone 7 to 10 – Machines with loading devices ................................................................................... 23

5.3 Electrical hazards ......................................................................................................................................... 24

5.3.1 General ............................................................................................................................................................. 24

5.3.2 Stopping function of switching devices ................................................................................................ 24

5.3.3 Emergency stop device ............................................................................................................................... 24

5.3.4 Protection against water ingress ............................................................................................................ 25

5.3.5 ON- and OFF-switch ..................................................................................................................................... 26

5.3.6 Safety requirements related to electromagnetic phenomena ..................................................... 26

5.4 Hazards from loss of stability .................................................................................................................. 26

5.5 Noise reduction ............................................................................................................................................. 26

5.6 Hazards from use of gases (N2, CO2 and steam) ................................................................................. 26

5.7 Ergonomic requirements .......................................................................................................................... 27

5.8 Hygiene and cleaning .................................................................................................................................. 28

5.8.1 General ............................................................................................................................................................. 28

5.8.2 Food area ......................................................................................................................................................... 28

5.8.3 Splash area...................................................................................................................................................... 29

5.8.4 Non-food area ................................................................................................................................................ 29

5.8.5 Surface conditions ....................................................................................................................................... 30

5.8.6 Cleaning ........................................................................................................................................................... 30

6 Verification of safety requirements and/or measures ................................................................... 30

7 Information for use ..................................................................................................................................... 31

7.1 General ............................................................................................................................................................. 31

7.2 Operating instructions ............................................................................................................................... 31

7.3 Marking ............................................................................................................................................................ 34

Annex A (normative) Noise test code for mincing machines (grade 2) ................................................... 35

A.1 Emission sound pressure level determination ................................................................................. 35

A.2 Installation and mounting conditions .................................................................................................. 35

---------------------- Page: 4 ----------------------
oSIST prEN 12331:2018
prEN 12331:2018 (E)

A.3 Operating conditions ................................................................................................................................... 35

A.4 Measurement ................................................................................................................................................. 35

A.5 Information to be recorded ...................................................................................................................... 35

A.6 Information to be reported ....................................................................................................................... 35

A.7 Declaration and verification of the noise emission values ............................................................ 36

Annex B (normative) Design principles to ensure cleanability of mincing machines ......................... 37

B.1 Definition ......................................................................................................................................................... 37

B.2 Materials .......................................................................................................................................................... 37

B.2.1 General ............................................................................................................................................................. 37

B.2.2 Type of materials .......................................................................................................................................... 38

B.2.2.1 Materials for food area ............................................................................................................................... 38

B.2.2.2 Materials for splash area ........................................................................................................................... 38

B.2.2.3 Non-foood area .............................................................................................................................................. 38

B.3 Design ............................................................................................................................................................... 38

B.3.1 General ............................................................................................................................................................. 38

B.3.2 Food area ......................................................................................................................................................... 38

B.3.3 Splash area ...................................................................................................................................................... 39

B.3.4 Non-food area ................................................................................................................................................. 41

Annex ZA (informative) Relationship between this European Standard and the essential

requirements of Directive 2006/42/EC aimed to be covered ...................................................... 42

Bibliography ................................................................................................................................................................. 43

---------------------- Page: 5 ----------------------
oSIST prEN 12331:2018
prEN 12331:2018 (E)
European foreword

This document (prEN 12331:2018) has been prepared by Technical Committee CEN/TC 153 “Machinery

intended for use with foodstuffs and feed”, the secretariat of which is held by DIN.

This document is currently submitted to the CEN Enquiry.
This document will supersede EN 12331:2015.

This document has been prepared under a standardization request given to CEN by the European

Commission and the European Free Trade Association, and supports essential requirements of

EU Directive 2006/42/EC.

For relationship with EU Directive 2006/42/EC, see informative Annex ZA, which is an integral part of

this document.
Significant changes

The significant changes with respect to the previous edition EN 12331:2015 are listed below:

— for better distinction, two types of machines are defined: professional and industrial;

— the requirements have been specified and revised with regard to the two types of machine

(professional and industrial).
---------------------- Page: 6 ----------------------
oSIST prEN 12331:2018
prEN 12331:2018 (E)
Introduction
This document is a type-C-standard as stated in EN ISO 12100.

This document is of relevance, in particular for the following stakeholder groups representing the market

players with regard to machinery safety:
— machine manufacturers (small, medium and large enterprises);

— health and safety bodies (regulators, accident prevention organizations, market surveillance, etc.).

Others can be affected by the level of machinery safety achieved with the means of the document by the

above-mentioned stakeholder groups:
— machine users/employers (small, medium and large enterprises);

— machine users/employees (e.g. trade unions, organizations for people with special needs);

— service providers, e.g. for maintenance (small, medium and large enterprises);
— consumers (in the case of machinery intended for use by consumers).

The above-mentioned stakeholder groups have been given the possibility to participate at the drafting

process of this document.

The machinery concerned and the extent to which hazards, hazardous situations and hazardous events

are covered are indicated in the scope of this document.

When provisions of this type-C-standard are different from those which are stated in type-A- or -B-

standards, the provisions of this type-C-standard take precedence over the provisions of the other

standards, for machines that have been designed and built according to the provisions of this type-C-

standard.
---------------------- Page: 7 ----------------------
oSIST prEN 12331:2018
prEN 12331:2018 (E)
1 Scope

1.1 This documentd specifies requirements for the design and manufacture of mincing machines (see

Figures 1 a and 1 b).

The mincing machines (hereinafter referred to as machine) covered by this document are used for size

reduction of fresh or frozen meat, meat products and fish (hereinafter referred to as product) by cutting

in a set of cutting tools.

Machines for domestic uses are not included in this document. Filling mincers are covered by EN 12463

“Food processing machinery — Filling machines and auxiliary machines — Safety and hygiene

requirements”.

This document applies only to machines that are manufactured after the date of issue of this document.

This document covers:

— professional machines used for on-demand preparation in shops characterized by:

— designed as a table top machine;
— and having a feed tray;
— and the product is only feed manually;
— and is only operated from the ground;
— and is operated by no more than one operator;

— and with full visibility and full accessibility of the entire machine from the operator workstation;

— and having hole plate diameter ≤ 106 mm;
— and a worm casing set which is removable without using any tools;
— and the weight of the worm casing set ≤ 15 kg;

NOTE The table top machine can be equipped with a frame or base, so no separate table is needed.

— industrial machines used for industrial mass production, and which cannot be characterized as a

professional machine.

The extent to which hazards are covered, is indicated in this document. For other hazards which are not

covered by this document, machinery should comply with EN ISO 12100:2010 where applicable.

This document does not describe the specific requirements for the control of machines with foot switch.

This document does not describe the specific requirements for additional mixing screws in the feed intake

hopper which are covered by EN 13570 “Food processing machinery — Mixing machines — Safety and

hygiene requirements”.
1.2 This document covers the following types of machines:
— machine with feed tray, feed intake and pusher (see Figure 3);

— machine with feed tray, feed intake, restrictor plate and pusher (see Figure 4);

— machine with feed intake hopper, cover and screw conveyor (see Figure 5);
---------------------- Page: 8 ----------------------
oSIST prEN 12331:2018
prEN 12331:2018 (E)

— machine with feed intake hopper, with or without cover, screw conveyor, with loading device

(continuously or discontinuously).

Machines comprise a machine base, a worm casing with a worm, a feed tray (with feed intake) or a feed

intake hopper, a screw conveyor, a set of cutting tools, a lock nut, a loading device, a drive motor and –

depending on machine type – electrical, hydraulic and pneumatic components. They will also have

various safeguarding devices as examples in Clause 5.

a) Machine with feed tray and restrictor plate b) Machine with feed intake hopper,

cover andscrew conveyor
Key
1 lock nut 6 feed intake 11 feed intake hopper 15 lock nut
2 hole plate 7 pusher 12 screw conveyor 16 protective hood
3 blade 8 restrictor plate 13 cover 17 worm
4 worm 9 feed tray 14 on-/off-switch with 18 machine rack
protective hood
5 worm casing 10 on-/off-switch
Figure 1 — Arrangement of a mincing machine
Machines may be equipped e.g. with:
— an extraction claw;
— an ejector or extractor;
— a protective hood over the discharge outlet;
— a cover over the inlet opening of the feed intake hopper;

— a transport carriage for the lock nut, the set of cutting tools, the worm and the screw conveyor;

— a lifting device for the lock nut, the set of cutting tools, the worm and the screw conveyor;

— a loading device.
---------------------- Page: 9 ----------------------
oSIST prEN 12331:2018
prEN 12331:2018 (E)
1.3 Intended use

The product is fed manually or with a loading device into the mincing machine. The product is fed to the

worm either by a pusher or a screw conveyor and reduced in size by a set of cutting tools.

It is foreseeable that industrial machines will be cleaned with pressurized water, so the requirements

of 5.3.4 shall apply to all industrial machines in the scope of this standard. This is not applicable to

professional machines.

This document specifies all significant hazards, hazardous situations and events relevant to machines,

when they are used as intended and under conditions of misuse which are reasonably foreseeable by the

manufacturer (see Clause 4).

This document specifies the hazards which can arise during commissioning, operation, cleaning, use,

maintenance and decommissioning of the machine.
2 Normative references

The following documents are referred to in the text in such a way that some or all of their content

constitutes requirements of this document. For dated references, only the edition cited applies. For

undated references, the latest edition of the referenced document (including any amendments) applies.

EN 349, Safety of machinery — Minimum gaps to avoid crushing of parts of the human body

EN 614-1, Safety of machinery — Ergonomic design principles — Part 1: Terminology and general

principles

EN 1005-1, Safety of machinery — Human physical performance — Part 1: Terms and definitions

EN 1005-2, Safety of machinery — Human physical performance — Part 2: Manual handling of machinery

and component parts of machinery

EN 1005-3, Safety of machinery — Human physical performance — Part 3: Recommended force limits for

machinery operation

EN 1672-2:2005+A1:2009, Food processing machinery — Basic concepts — Part 2: Hygiene requirements

EN 60204-1:2006, Safety of machinery — Electrical equipment of machines — Part 1: General

requirements (IEC 60204-1:2005, modified)
EN 60529, Degrees of protection provided by enclosures (IP Code) (IEC 60529)

EN 61496-1, Safety of machinery — Electro-sensitive protective equipment — Part 1: General requirements

and tests (IEC 61496-1)

EN ISO 4287, Geometrical product specifications (GPS) — Surface texture: Profile method — Terms,

definitions and surface texture parameters (ISO 4287)

EN ISO 4871, Acoustics — Declaration and verification of noise emission values of machinery and equipment

(ISO 4871)

EN ISO 11204:2010, Acoustics — Noise emitted by machinery and equipment — Determination of emission

sound pressure levels at a work station and at other specified positions applying accurate environmental

corrections (ISO 11204:2010)
---------------------- Page: 10 ----------------------
oSIST prEN 12331:2018
prEN 12331:2018 (E)

EN ISO 11688-1, Acoustics — Recommended practice for the design of low-noise machinery and equipment

— Part 1: Planning (ISO/TR 11688-1)

EN ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk

reduction (ISO 12100:2010)

EN ISO 13849-1:2015, Safety of machinery — Safety-related parts of control systems — Part 1: General

principles for design (ISO 13849-1:2015)

EN ISO 13857:2008, Safety of machinery — Safety distances to prevent hazard zones being reached by

upper and lower limbs (ISO 13857:2008)

EN ISO 14119:2013, Safety of machinery — Interlocking devices associated with guards — Principles for

design and selection (ISO 14119:2013)

EN ISO 14120:2015, Safety of machinery — Guards — General requirements for the design and

construction of fixed and movable guards (ISO 14120:2015)
3 Terms and definitions

For the purposes of this document, the terms and definitions given in EN ISO 12100:2010 and the

following apply.

ISO and IEC maintain terminological databases for use in standardization at the following addresses:

— IEC Electropedia: available at http://www.electropedia.org/
— ISO Online browsing platform: available at http://www.iso.org/obp
3.1
platform
accessible workstation
3.2
worm

rotating screw-shaped component in the worm casing for product transport to the set of cutting tools

3.3
step
interlocked workstation
3.4
ejector/extractor
device for detaching the set of cutting tools and the worm
3.5
extraction claw
tool for detaching the set of cutting tools and the worm
3.6
loading device
device for the lifting and tilting of transport cars and containers
---------------------- Page: 11 ----------------------
oSIST prEN 12331:2018
prEN 12331:2018 (E)
3.7
container
device for holding processed and/or unprocessed product
3.8
cover
movable device with safety function
3.9
feed intake
housing between the feed tray and the worm casing
3.10
feed intake hopper
device for holding the unprocessed product
3.11
locking device
device for locking the trolley or container in the load bearing device
3.12
trolley
movable container
3.13
design dimension

sum of dimensions measured from the workstation (floor, steps, intermediate steps or platforms) to the

hopper edge and from the hopper edge to the first danger point in the feed intake hopper (see Figure 6

and Figure 7)
3.14
cooling mincer
machine with a cooling device for the feed intake and the worm casing
3.15
workstation
every location at the machine from which the operator interacts with the machine
3.16
hole plate
plate with bores
3.17
end hole plate
last hole plate towards the outlet
3.18
blade
element for cutting the product
3.19
feed tray
device for receiving the product to be processed to feed the feed intake by hand
---------------------- Page: 12 ----------------------
oSIST prEN 12331:2018
prEN 12331:2018 (E)
3.20
mechanical trip bar
movable device with a safety function
3.21
worm casing
element for holding the worm and the set of cutting tools
3.22
worm casing set

arrangement consisting of a worm casing, a worm, a set of cutting tools and a lock nut

3.23
set of cutting tools
arrangement of blades and hole plates for size reduction of product

Note 1 to entry: The number and type of cutting tools used is selected depending on the desired quality of the minced

product.
3.24
protective grid
movable device on the feed intake hopper mouth
3.25
protective hood
movable device on the discharge outlet
3.26
restrictor plate
stationary non-detachable device above the feed intake
3.27
pusher
device used to push the product further in the feed intake
3.28
screw conveyor

rotating screw-shaped component in the feed intake hopper for product transport to the worm

3.29
transport carriage

movable device for holding the lock nut, set of cutting tools, worm and screw conveyor

3.30
lock nut
device for locking the set of cutting tools in the worm casing
3.31
professional machine
machine used for on-demand preparation in shops or restaurants

Note 1 to entry: A professional machine shows at least all of the following features:

— is a table top machine;
---------------------- Page: 13 ----------------------
oSIST prEN 12331:2018
prEN 12331:2018 (E)
— consists of a feed tray for only manual product feeding;

— is only operated from the ground and operated by no more than one operator who has full visibility and

full accessibility of the entire machine from the operator workstation.

If any of the features is missing the machine is considered an industrial machine. The table top machine can be

equipped with a frame or base, so no separate table is needed.
3.32
industrial machine

machine used for industrial mass production, and which cannot be characterized as a professional

machine
4 List of significant hazards

This clause contains the hazards, hazardous situations and events, as far as they are dealt with in this

document, identified by risk assessment as significant for this type of machinery and which require action

to eliminate or reduce risk.
Figure 1 shows the significant hazard zones of machines.
Table 1 — List of significant hazards
Hazards,
hazardous Clause/subclause
situations and Location or cause in this European
hazardous Standard
events
General; significant hazard zones (see Figure 2). 5.2.1
Zone 1: Machines with feed intake and worm; rotating screw conveyor
at the end of the feed intake (see Figure 2 a)); hazards of 5.2.2
entanglement, shearing or severing of fingers or hand.
Zone 2: Machines with feed intake hopper and screw conveyor;
rotating screw conveyor (see Figure 2 b)); hazards of entanglement, 5.2.3
shearing or severing of fingers, hand or forearm.
Zone 3: Discharge outlet on machines; rotating blade behind the hole
Mechanical
plate at the discharge outlet (see Figure 2 b)); hazards of shearing of 5.2.4
hazards
fingers.
Zone 4: Removal of worm and set of cutting tools; worm casing with
worm and set of cutting tools at discharge outlet (see Figures 2 a)
5.2.5
and 2 b)); hazard of crushing to hands and feet during installation and
removal.
Zone 5: Drive mechanism; drive of worm, screw conveyor (see
Figure 2 b)); hazards of crushing, shearing or entanglement to fingers 5.2.6
or hand.
Zone 6: Machine components, e.g. cover over hopper edge;
unintentional shutting and intentional closing of the cover (see 5.2.7
Figure 2 b)); hazards of crushing to fingers or hand.
Mechanical
hazards
Loading device on machines (see Figure 2 b));
5.2.8
Zone 7: Space below transport carriage or container; hazards of
trapping or crushing on floor level during descent to the body; hazards
---------------------- Page: 14 ----------------------
oSIST prEN 12331:2018
prEN 12331:2018 (E)
Hazards,
hazardous Clause/subclause
situations and Location or cause in this European
hazardous Standard
events
of impact during uncontrolled descent e.g. In the case of mechanical
upsets to the body;
Zone 8: Path of movement of transport carriage and container;
hazards of impact from moving components to the body; hazards of
crushing or shearing between moving and stationary components of
fingers or hand;
Zone 9: Drive elements and (where used) pulleys, chains or wire
ropes; hazard of drawing-in, shearing, crushing or entanglement of
fingers or hand;
Zone 10: D
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.