EN ISO 294-4:2019
(Main)Plastics - Injection moulding of test specimens of thermoplastic materials - Part 4: Determination of moulding shrinkage (ISO 294-4:2018)
Plastics - Injection moulding of test specimens of thermoplastic materials - Part 4: Determination of moulding shrinkage (ISO 294-4:2018)
This document specifies a method of determining the moulding shrinkage and post-moulding shrinkage of injection-moulded test specimens of thermoplastic material in the directions parallel to and normal to the direction of melt flow.
For the determination of shrinkage of thermosets, see ISO 2577[2].
Moulding shrinkage as defined in this document excludes the effects of humidity uptake. This is included in post-moulding shrinkage and thus in total shrinkage. For cases when post-moulding shrinkage is caused by the uptake of humidity only, see ISO 175[1].
Moulding shrinkage as defined in this document represents the so-called free shrinkage with unrestricted deformation of the cooling plates in the mould during the hold period. It is considered, therefore, as the maximum value of any restricted shrinkage.
Kunststoffe - Spritzgießen von Probekörpern aus Thermoplasten - Teil 4: Bestimmung der Verarbeitungsschwindung (ISO 294-4:2018)
Plastiques - Moulage par injection des éprouvettes de matériaux thermoplastiques - Partie 4: Détermination du retrait au moulage (ISO 294-4:2018)
Le présent document spécifie une méthode de détermination du retrait au moulage et du post-retrait des éprouvettes de matériaux thermoplastiques moulées par injection, parallèlement et perpendiculairement à la direction de l'écoulement.
Pour la détermination du retrait des matériaux thermodurcissables, voir l'ISO 2577[2].
Le retrait au moulage tel que défini dans le présent document exclut les effets de l'absorption d'humidité. Ces derniers sont inclus dans le post-retrait et donc dans le retrait total. Lorsque le post-retrait n'est dû qu'à une absorption d'humidité, voir l'ISO 175[1].
Le retrait au moulage tel que défini dans le présent document représente le retrait dit «libre», avec déformation non limitée des plaques en refroidissement dans le moule pendant la période de maintien. Par conséquent, il est considéré comme donnant la valeur maximale de tout retrait restreint.
Polimerni materiali - Preskušanci iz plastomerov, oblikovani z injekcijskim vbrizgavanjem - 4. del: Določitev skrčka pri oblikovanju (ISO 294-4:2018)
Ta dokument določa metodo za določitev skrčka pri oblikovanju in skrčka po oblikovanju preskušancev iz plastomerov, oblikovanih z injekcijskim vbrizgavanjem, v smeri vzporedno in običajno na smer pretoka taline.
Za določitev skrčka termoaktivnih materialov glej standard ISO 2577[2].
Skrček pri oblikovanju, kot je opredeljen v tem dokumentu, izključuje učinke vpijanja vlage. To je vključeno v skrčku po oblikovanju in s tem tudi v skupnem skrčku. Za primere, ko skrček po oblikovanju povzroča samo vpijanje vlage, glej standard ISO 175[1].
Skrček pri oblikovanju, kot je določen v tem dokumentu, predstavlja tako imenovani prosti skrček z neomejeno deformacijo hladilnih plošč v kalupu med obdobjem zadrževanja. Zato se šteje za največjo vrednost katerega koli omejenega skrčka.
General Information
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Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 294-4:2019
01-april-2019
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SIST EN ISO 294-4:2003
SIST EN ISO 294-4:2003/AC:2011
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Plastics - Injection moulding of test specimens of thermoplastic materials - Part 4:
Determination of moulding shrinkage (ISO 294-4:2018)
Kunststoffe - Spritzgießen von Probekörpern aus Thermoplasten - Teil 4: Bestimmung
der Verarbeitungsschwindung (ISO 294-4:2018)
Plastiques - Moulage par injection des éprouvettes de matériaux thermoplastiques -
Partie 4: Détermination du retrait au moulage (ISO 294-4:2018)
Ta slovenski standard je istoveten z: EN ISO 294-4:2019
ICS:
83.080.20 Plastomeri Thermoplastic materials
SIST EN ISO 294-4:2019 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 294-4:2019
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SIST EN ISO 294-4:2019
EN ISO 294-4
EUROPEAN STANDARD
NORME EUROPÉENNE
February 2019
EUROPÄISCHE NORM
ICS 83.080.20 Supersedes EN ISO 294-4:2003
English Version
Plastics - Injection moulding of test specimens of
thermoplastic materials - Part 4: Determination of
moulding shrinkage (ISO 294-4:2018)
Plastiques - Moulage par injection des éprouvettes de Kunststoffe - Spritzgießen von Probekörpern aus
matériaux thermoplastiques - Partie 4: Détermination Thermoplasten - Teil 4: Bestimmung der
du retrait au moulage (ISO 294-4:2018) Verarbeitungsschwindung (ISO 294-4:2018)
This European Standard was approved by CEN on 18 January 2019.
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, 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.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 294-4:2019 E
worldwide for CEN national Members.
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SIST EN ISO 294-4:2019
EN ISO 294-4:2019 (E)
Contents Page
European foreword . 3
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SIST EN ISO 294-4:2019
EN ISO 294-4:2019 (E)
European foreword
This document (EN ISO 294-4:2019) has been prepared by Technical Committee ISO/TC 61 "Plastics" in
collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN.
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 August 2019, and conflicting national standards shall
be withdrawn at the latest by August 2019.
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 ISO 294-4:2003.
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, 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 the United Kingdom.
Endorsement notice
The text of ISO 294-4:2018 has been approved by CEN as EN ISO 294-4:2019 without any modification.
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