Plastics moulded parts — Tolerances and acceptance conditions

This document specifies possible manufacturing tolerances for plastic moulded parts. This document specifies all integral features with general tolerances with surface profile tolerance within a specified datum system. It allows for additional specifications in case of functional needs and requirements using the ISO-GPS-tools for dimensional and geometrical tolerating. This document addresses injection moulding, injection compression moulding, transfer moulding, compression moulding and rotational moulding of non-porous moulded parts made from thermoplastics, thermoplastic elastomers and thermosets of thermoplastics. This document is applicable to other plastic processes if agreed to by the contractual parties. Moulded part surface imperfections such as sink marks, undesired flow structures and roughness, as well as joint lines are not addressed in this document. This document is not intended to supplant, replace or in any way interfere with requirements for tolerances found in product standards.

Moulages plastiques — Tolérances et conditions de réception

General Information

Status
Published
Publication Date
27-Aug-2018
Technical Committee
Drafting Committee
Current Stage
9093 - International Standard confirmed
Completion Date
18-Mar-2024
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ISO 20457:2018 - Plastics moulded parts -- Tolerances and acceptance conditions
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INTERNATIONAL ISO
STANDARD 20457
First edition
2018-09
Plastics moulded parts — Tolerances
and acceptance conditions
Moulages plastiques — Tolérances et conditions de réception
Reference number
ISO 20457:2018(E)
©
ISO 2018

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ISO 20457:2018(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2018
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
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Email: copyright@iso.org
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Published in Switzerland
ii © ISO 2018 – All rights reserved

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ISO 20457:2018(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Symbols and abbreviated terms . 2
4.1 General . 2
4.2 Symbols . 2
4.3 Abbreviated terms . 3
5 Tolerancing of plastic moulded parts . 3
5.1 General . 3
5.2 Intention . 4
5.3 General tolerances . 5
5.4 Direct tolerancing (individual tolerancing) . 5
5.5 Tolerancing of draft angles . 5
5.6 Dimensioning, tolerancing and measuring of radii . 6
5.7 Specification of freeform surfaces . 6
6 Moulding compound properties . 6
6.1 General . 6
6.2 Moulding sh
...

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