EN 12012-3:2001

Rubber and plastics machines - Size reduction machines - Part 3: Safety requirements for shredders

This standard specifies the essential safety requirements applicable to the design and construction of shredders used for plastic and rubber.
The machine begins with the outer edge of the feed hopper and ends with the discharge area.
This standard does not deal with equipement for feeding material or discharging shredded material.
This standard does not deal with safety measures to reduce the risk from ignition of flammable residues in material to be shredded
This standard does not deal with requirements for local exhaust ventilation systems
Only the significant hazards listed in clause 4 and dealt with in clause 5 are subject to this standard.

Gummi- und Kunststoffmaschinen - Zerkleinerungsmaschinen - Teil 3: Sicherheitsanforderungen für Walzenzerkleinerer

Anwendungsbereich
Diese Norm behandelt die wesentlichen Sicherheitsanforderungen, die bei Konzipierung und Bau von
Walzenzerkleinerern für Gummi und Kunststoffe anzuwenden sind.
Die Maschine beginnt an der Außenkante des Einfülltrichters und endet mit dem Entnahmebereich.
Diese Norm behandelt nicht die Ausrüstung zum Beschicken oder zum Entnehmen des zerkleinerten
Materials.
Diese Norm behandelt nicht die Schutzmaßnahmen zur Verringerung der Risiken durch eine Entzündung
brennbarer Rückstände in den zu zerkleinernden Materialien.
Diese Norm behandelt nicht die Anforderungen für lokale Absaugsysteme.
Nur die im Abschnitt 4 angegebenen und im Abschnitt 5 behandelten signifikanten Gefährdungen sind
Gegenstand dieser Norm.
ANMERKUNG Die Richtlinie 94/9/EG bezüglich Geräte und Schutzsysteme zur bestimmungsgemäßen Verwendung in
explosionsgefährdeten Bereichen kann bei Maschinen oder Bauteilen nach dieser Europäischen Norm zur Anwendung
kommen. Es kann nicht davon ausgegangen werden, dass die vorliegende Norm mit der Richtlinie 94/9/EG in
Übereinstimmung ist. Zur Erfüllung der Richtlinie 94/9/EG können zusätzliche Sicherheitsanforderungen in einer
zukünftigen Ausgabe dieser Norm erforderlich sein.
Diese Norm gilt für Maschinen, die nach dem Annahmedatum der Norm durch CEN hergestellt worden sind.

Machines pour le caoutchouc et les matières plastiques - Machines à fragmenter - Partie 3: Prescriptions de sécurité relatives aux déchiqueteurs

.
1 Domaine d'application
La présente norme spécifie les exigences essentielles de sécurité relatives à la conception et à la construction des déchiqueteurs utilisés pour les matières plastiques et le caoutchouc.
La machine commence avec le bord extérieur de la trémie d'alimentation et se termine à la zone de déchargement.
La présente norme ne traite pas de l'équipement d'alimentation de matière ou de déchargement de matériau déchiqueté.
La présente norme ne traite pas des mesures de sécurité destinées à réduire le risque d'inflammation des résidus combustibles dans les matériaux à déchiqueter.
La présente norme ne traite pas des exigences relatives aux systèmes de ventilation locale.
Seuls les phénomènes dangereux énumérés à l'article 4 et traités à l'article 5 sont couverts par la présente norme.
NOTE   La Directive 94/9/CE relative aux appareils et systèmes de protection destinés à être utilisés en atmosphères explosibles peut être appliquée au type de machine ou équipement couvert par la présente Norme européenne. La présente norme ne satisfait pas exactement aux exigences de la directive 94/9/CE. Des exigences de sécurité supplémentaires peuvent être nécessaires lors de sa future révision afin d'être conforme à la directive 94/9/CE.
Ce document n'est pas applicable aux déchiqueteurs qui ont été fabriqués avant la date de publication de ce document par le CEN.

Rubber and plastics machines - Size reduction machines - Part 3: Safety requirements for shredders

General Information

• Status: Withdrawn
• Publication Date: 20-Mar-2001
• Withdrawal Date: 15-Jul-2008
• ICS: 83.200 - Equipment for the rubber and plastics industries
• Technical Committee: CEN/TC 145 - Rubber and plastics machines - Safety
• Drafting Committee: CEN/TC 145 - Rubber and plastics machines - Safety
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 16-Jul-2008
• Completion Date: 16-Jul-2008
• Directive: 98/37/EC - Machinery
• Mandate: M/BC/CEN/88/13 - Standardization request to CEN/CENELEC relating to machinery
• Ref Project: SIST EN 12012-3:2002 - Rubber and plastics machines - Size reduction machines - Part 3: Safety requirements for shredders

Relations

• Merged Into: EN 12012-3:2001+A1:2008 - Plastics and rubber machines - Size reduction machines - Part 3: Safety requirements for shredders
• Effective Date: 22-Dec-2008

Standards Content (Sample)

SLOVENSKI STANDARD
SIST EN 12012-3:2002
01-januar-2002
Rubber and plastics machines - Size reduction machines - Part 3: Safety
requirements for shredders
Rubber and plastics machines - Size reduction machines - Part 3: Safety requirements
for shredders
Gummi- und Kunststoffmaschinen - Zerkleinerungsmaschinen - Teil 3:
Sicherheitsanforderungen für Walzenzerkleinerer
Machines pour le caoutchouc et les matieres plastiques - Machines a fragmenter - Partie
3: Prescriptions de sécurité relatives aux déchiqueteurs
Ta slovenski standard je istoveten z: EN 12012-3:2001
ICS:
83.200 Oprema za gumarsko Equipment for the rubber and
industrijo in industrijo plastics industries
polimernih materialov
SIST EN 12012-3:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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EUROPEAN STANDARD
EN 12012-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
March 2001
ICS 83.200
English version
Rubber and plastics machines - Size reduction machines - Part
3: Safety requirements for shredders
Machines pour le caoutchouc et les matières plastiques - Gummi- und Kunststoffmaschinen -
Machines à fragmenter - Partie 3: Prescriptions de sécurité Zerkleinerungsmaschinen - Teil 3:
relatives aux déchiqueteurs Sicherheitsanforderungen an Walzenzerkleinerer
This European Standard was approved by CEN on 18 January 2001.
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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 12012-3:2001 E
worldwide for CEN national Members.

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Page 2
EN 12012-3:2001
CONTENTS
Page
Foreword 3
Introduction 4
1 Scope 4
2 Normative references 5
3 Terms and definitions 8
4 List of significant hazards 10
5 Safety requirements and/or protective measures 11
6 Verification of conformity with the safety requirements and/or protective measures 15
7 Information for use 16
ANNEX A (normative) Measurement and declaration of noise emission values 18
ANNEX ZA (informative) Relationship of this document with EC Directives 22

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Page 3
EN 12012-3:2001
Foreword
This European standard has been prepared by Technical Committee CEN/TC 145 "Rubber and plastics
machines - Safety", the secretariat of which is held by UNI.
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 September 2001, and conflicting national standards
shall be withdrawn at the latest by September 2001.
This European standard has been prepared under a mandate given to CEN by the European Commis-
sion and the European Free Trade Association, and supports essential requirements of EC Directives.
For relationship with EC Directives see informative Annex ZA which is an integral part of this standard.
This is the third in a series of standards on the safety of size reduction machines.
- Part 1 deals with blade granulators.
- Part 2 deals with strand pelletisers.
Annex A is normative.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the
following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway,
Portugal, Spain, Sweden, Switzerland and the United Kingdom.

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Page 4
EN 12012-3:2001
Introduction
This document is a type C standard as stated in EN 1070.
The machinery concerned and the extent to which hazards, hazardous situations and events are cov-
ered 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 stan-
dards, the provisions of this type C standard take precedence over the provisions of the other stan-
dards, for machines that have been designed and built according to the provisions of this tyoe C stan-
dard.
1 Scope
This standard specifies the essential safety requirements applicable to the design and construction of
shredders used for plastic and rubber.
The machine begins with the outer edge of the feed hopper and ends with the discharge area.
This standard does not deal with equipment for feeding material or discharging shredded material.
This standard does not deal with safety measures to reduce the risk from ignition of flammable residues
in material to be shredded
This standard does not deal with requirements for local exhaust ventilation systems
Only the significant hazards listed in clause 4 and dealt with in clause 5 are subject to this standard.
NOTE Directive 94/9/EC concerning equipment and protective systems intended for use in potentially
explosive atmospheres can be applicable to the type of machine or equipment covered by this European
Standard. The present standard does not necessarily comply with Directive 94/9/EC. Additional safety
requirements in a future revision of this standard may be necessary to satisfy Directive 94/9/EC.
This standard applies to machines which are manufactured after the date of approval of this standard by
CEN.

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Page 5
EN 12012-3:2001
2 Normative references
This European standard incorporates by dated or undated reference, provisions from other publications.
These normative references are cited at the appropriate places in the text and the publications are listed
hereafter. For dated references subsequent amendments to or revisions of any of these publications
apply to this European standard only when incorporated in it by amendment or revision. For undated
references the latest edition of the publication referred to applies (including amendments).
EN 292-1:1991 Safety of Machinery - Basic concepts, general principles for design
Part 1: Basic terminology, methodology
EN 292-2:1991 Safety of Machinery - Basic concepts, general principles for design
+A1:1995 Part 2: Technical principles and specifications
EN 294:1992 Safety of Machinery - Safety distances to prevent danger zones being reached by
the upper limbs
EN 418:1992 Safety of Machinery - Emergency stop equipment, functional aspects - Principles
for design
EN 626-1:1994 Safety of Machinery - Reduction of risk to health from hazardous substances
emitted by machinery – Part 1:Principles and specifications for machinery manu-
facturers
EN 953:1997 Safety of Machinery - Guards - General requirements for the design and construc-
tion of fixed and movable guards
EN 954-1:1996 Safety of Machinery - Safety related parts of control systems - Part 1: General
principles for design
EN 999:1998 Safety of machinery – The positioning of protective equipment in respect of ap-
proach speeds of parts of the human body
EN 1037:1995 Safety of machinery - Prevention of unexpected start-up
EN 1070 Safety of machinery - Terminology
EN 1088:1995 Safety of Machinery - Interlocking devices associated with guards -
Principles for design and selection
EN 50014 Electrical apparatus for potentially explosive atmospheres - General
requirements
EN 50015 Electrical apparatus for potentially explosive atmospheres -
Oil-immersion "o"
EN 50016 Electrical apparatus for potentially explosive atmospheres -
Pressurised apparatus "p"
EN 50017 Electrical apparatus for potentially explosive atmospheres -
Powder filling "q"

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Page 6
EN 12012-3:2001
EN 50018 Electrical apparatus for potentially explosive atmospheres -
Flameproof enclosures "d"
EN 50019 Electrical apparatus for potentially explosive atmospheres -
Increased safety "e"
EN 50020 Electrical apparatus for potentially explosive atmospheres -
Intrinsic safety "i"
EN 60204-1:1997 Safety of Machinery - Electrical equipment of machines -
Part 1: General requirements (IEC 60204-1:1997)
EN 60529:1991 Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)
EN ISO 3741:1999 Acoustics -Determination of sound power levels of noise sources using sound
pressure - Precision methods for reverberation rooms (ISO 3741:1999)
EN ISO 3743-1:1995 Acoustics - Determination of sound power levels of noise sources -
Engineering methods for small movable sources in reverberant fields -
Part 1: Comparison method for hard-walled test rooms (ISO 3743:1994)
EN ISO 3743-2:1996 Acoustics - Determination of sound power levels of noise sources
using sound pressure - Engineering methods for small movable
sources in reverberant fields - Part 2: Methods for special
reverberation test rooms (ISO 3743-2:1994)
EN ISO 3744:1995 Acoustics - Determination of sound power levels of noise sources
using sound pressure - Engeneering method in an essentially free field over a re-
flecting plane (ISO 3744:1994)
EN ISO 3746:1995 Acoustics - Determination of sound power levels of noise sources
using sound pressure - Survey method using an enveloping
measurement surface over a reflecting plane (ISO 3746:1995)
EN ISO 3747:2000 Acoustics - Determination of sound power levels of noise sources using sound
pressure – comparison method for use in-situ (ISO 3747:2000)
EN ISO 4871:1996 Acoustics - Declaration and verification of noise emission values of
machinery and equipment (ISO 4871:1996)
EN ISO 9614-1:1995 Acoustics - Determination of sound power levels of noise sources using sound in-
tensity - Part 1: Measurement at discrete points (ISO 9614-1:1993)
EN ISO 9614-2:1996 Acoustics - Determination of sound power levels of noise sources using sound in-
tensity - Part 2: Measurement by scanning (ISO 9614-2:1996)
EN ISO 11201:1995 Acoustics - Noise emitted by machinery and equipment -
Measurement of emission sound pressure levels at the work station and at other
specified positions - Engineering method in an essentially free field over a reflect-
ing plane (ISO 11201:1995)

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EN 12012-3:2001
EN ISO 11202:1995 Acoustics - Noise emitted by machinery and equipment -
Measurement of emission sound pressure levels at the work station and at other
specified positions - Survey method in situ (ISO 11202:1995)
EN ISO 11203:1995 Acoustics - Noise emitted by machinery and equipment -
Determination of emission sound pressure levels at the work station
and at other specified positions from the sound power level (ISO 11203:1995)
EN ISO 11204:1995 Acoustics - Noise emitted by machinery and equipment -
Measurement of emission sound pressure levels at the work station and at other
specified positions - Method requiring environmental corrections (ISO 11204:1995)
EN ISO 11688-1:1998 Acoustics - Recommended practice for the design of low-noise
machinery and equipment - Part 1: Planning (ISO/TR 11688-1:1995)
ISO 3745:1977 Acoustics - Determination of sound power levels of noise sources -
Precision methods for anechoic and semi-anechoic rooms

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EN 12012-3:2001
3 Terms and definitions
For the purposes of this document, the terms and definitions given in EN 1070 and the following terms
and definitions apply:
3.1
shredder
machine with one or more low speed rotating shafts on which cutting tools are fitted which shred
the material between the tools on the revolving shaft(s) or between the tools on one shaft and a station-
ary cutting tool
3.2
shredding chamber
part of the machine where shredding takes place
3.3
rotor
one or more rotating devices including the shaft(s), tools and/or cutting tools inside the shredding cham-
ber
3.4
stationary cutting tool
single or multiple tools fixed inside the shredding chamber
3.5
feeding device
part of the machine used for feeding the material into the shredding chamber. The feeding device can
be fixed, e.g. a hopper or similar device, or moveable, e.g. a conveyor belt(s)
3.6
feeding area
area of the machine where the feeding of material takes place
3.7
discharge area
area where the cut material leaves the shredding chamber
3.8
working level
surface on which the person who feeds the machine stands

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EN 12012-3:2001
1 Grab 1 Fixed guard 1 Feeding area
2 Protective flap 2 Shredding chamber
3 Conveyor belt 3 Discharge area
Figure 1a Figure 1b Figure 1c
Figure 1 - Examples of shredders

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EN 12012-3:2001
4 List of significant hazards
4.1 Mechanical hazards
4.1.1 Shredding chamber
- ejection of parts of the machine or materials through the chamber;
- crushing/shearing between the rotor and the housing;
- cutting/severing by the tools.
4.1.2 Feeding area
- entanglement by the material being fed;
- ejection of parts of the machine or material through the feed opening.
4.1.3 Discharge area
- ejection or fall of parts of the machine or material.
4.2 Hazards due to noise
Noise can cause:
- hearing damage;
- accidents due to interference with speech communication or
- accidents due to interference with the perception of acoustic signals.
4.3 Hazards generated by the material processed
- due to contact and/or inhalation of harmful residues where for example drums or containers are being
shredded;
- due to ignition of flammable residues where for example drums or containers are being shredded.
4.4 Electrical hazards
- electric shock or burns due to direct contact with live conductive parts, or with parts that have be-
come live due to electrical fault.

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EN 12012-3:2001
5 Safety requirements and/or protective measures
Machinery shall comply with the safety requirements and/or protective measures of this clause. In addi-
tion, the machine shall be designed according to the principles of EN 292 for hazards relevant but not
significant, which are not dealt with by this document (e.g. sharp edges).
5.1 Mechanical hazards
5.1.1 Shredding chamber
5.1.1.1Strength
The chamber shall be able to resist stresses due to normal operation and which may result from foreign
bodies in the material or other objects.
5.1.1.2 Access to the shredding chamber
Access to the shredding chamber through openings shall be prevented by interlocking guards in accor-
dance with 3.6 of EN 953:1997 and EN 1088:1995 such that the guards remain closed and locked until
motion of the rotors and the feeding device has ceased. The safety related parts of the control system
shall be category 3 of EN 954-1:1996.
5.1.1.3 Access through the feed opening
The dimensions and the design of the hopper or other feeding device shall be such as to avoid the pos-
sibility of the upper limbs reaching the cutting chamber through the feed opening. The safety distances
shall be in accordance with EN 294:1992, table 2.
5.1.1.4 Access through the discharge opening
Access to the rotor(s) in the shredding chamber through the discharge opening shall be prevented until
the motion of the rotor(s) has ceased. This shall be achieved by interlocking guards in accordance with
3.5 of EN 953:1997 and EN 1088:1995, if the minimum distances between the guards and the rotors are
in accordance with EN 999:1998. If these minimum distances cannot be achieved, interlocking guards
with guard locking in accordance with 3.6 of EN 953:1997 and EN 1088:1995 shall be provided; the
safety related parts of the control system shall be category 3 of EN 954-1:1996.
5.1.2 Feeding area
5.1.2.1 Entanglement by the material being fed
The manufacturer shall give advice to the user on precautions to be taken if the material being proc-
essed is likely to cause entanglement (see 7.1.5).
NOTE In shredding lines materials are usually pre-cut by, for example, guillotines if the hazard due to
entanglement can occur.

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EN 12012-3:2001
5.1.2.2 Ejection of parts of the machine or material
Measures shall be taken at the design stage to prevent the possibility of ejection of parts of the machine
or of material through the feed opening. Examples of the measures which can be taken are:
- feeding devices designed in such a way that ejection of material or parts of the machine is prevented
so far as possible, as shown in figure 1a;
- protective flaps as shown in figure 1b.
5.1.3 Discharge area
Access to the rotor(s) in the discharge area shall be prevented until the motion of the rotor(s) has
ceased. This shall be achieved by fixed guards in accordance with 3.5 of EN 953:1997 and EN
1088:1995 if the minmum distances between the guards and the rotors are in accordance with EN
999:1998. If these minimum distances cannot be achieved, interlocking guards with guard locking in
accordance with 3.6 of EN 953:1997 and EN 1088:1995 shall be provided. The safety related parts of
the control system shall be category 3 of EN 954-1:1996.
If discharge equipment is provided, the same level of safety shall be achieved as that achieved by
guarding systems fitted at the discharge area.
5.2 Hazards due to noise
5.2.1 Noise reduction at source by design
When designing the machine, the availa
...