EN ISO 294-1:1998

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kunststoffe - Spritzgießen von Probekörpern aus Thermoplasten - Teil 1: Allgemeine Grundlagen und Herstellung von Vielzweckprobekörpern und Stäben (ISO 294-1:1996)Plastiques - Moulage par injection des éprouvettes de matériaux thermoplastiques - Partie 1: Principes généraux, et moulage des éprouvettes a usages multiples et des barreaux (ISO 294-1:1996)Plastics - Injection moulding of test specimens of thermoplastic materials - Part 1: General principles, and moulding of multipurpose and bar test specimens (ISO 294-1:1996)83.080.20PlastomeriThermoplastic materialsICS:Ta slovenski standard je istoveten z:EN ISO 294-1:1998SIST EN ISO 294-1:2000en01-maj-2000SIST EN ISO 294-1:2000SLOVENSKI
STANDARD



SIST EN ISO 294-1:2000



SIST EN ISO 294-1:2000



SIST EN ISO 294-1:2000



SIST EN ISO 294-1:2000



SIST EN ISO 294-1:2000



INTERNATIONAL STANDARD IS0 294-l First edition 1996-l 2-15 Plastics - Injection moulding of test specimens of thermoplastic materials - Part 1: General principles, and moulding of multipurpose and bar test specimens P/as tiques - Moulage par injection des gprouvettes de matkriaux thermoplastiques - Partie 7: Principes g6n6raux, et moulage des Gprouvettes 2 usages multiples et des barreaux Reference number IS0 294-l :I 996(E) SIST EN ISO 294-1:2000



IS0 294-1:1996(E) Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. IS0 collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard IS0 294-1 was prepared by Technical Committee lSO/TC 61, Plastics, Subcommittee SC 9, Thermoplastic materials. Together with the other parts, this part of IS0 294 cancels and replaces the second edition of IS0 294 (IS0 294:1995) which has been revised to improve the definition of the injection-moulding parameters and has been restructured to specify four types of IS0 mould for the production of the basic specimen types required for the acquisition of comparable test data. Care has been taken to ensure that the IS0 moulds described can all be fitted in existing injection-moulding equipment and have interchangeable cavity plates. IS0 294 consists of the following parts, under the general title Plastics - Injection moulding of test specimens of thermoplastic materials: - Part I: General principles, and moulding of multipurpose and bar test spectmens - Part 2: Small tensile bars - Part 3: Small plates Part 4: Determination of moulding shrinkage Annexes A to C of this part of IS0 294 are for information only. 0 IS0 1996 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission In writing from the publisher” International Organization for Standardization Case Postale 56 l CH-1211 Geneve 20 l Switzerland Printed in Switzerland ii SIST EN ISO 294-1:2000



@ IS0 IS0 294=1:1996(E) Introduction Many factors in the injection-moulding process may influence the properties of moulded test specimens and hence the measured values obtained when the specimens are used in a test method. The mechanical properties of such specimens are in fact strongly dependent on the conditions of the moulding process used to prepare the specimens. Exact definition of each of the main parameters of the moulding process is a basic requirement for reproducible and comparable operating conditions. It is important in defining moulding conditions to consider any influence the conditions may have on the properties to be determined . Thermoplastics may show differences in molecular orientation (important mainly with amorphous polymers), in crystallization morphology (for crystalline and semicrystalline polymers), in phase morphology (for heterogeneous thermoplastics) as well as in the orientation of anisotropic fillers such as short fibres. Residual (“frozen-in”) stresses in the moulded test specimens and thermal degradation of the polymer during moulding may also influence properties. Each of these phenomena must be controlled to avoid fluctuation of the numerical values of the properties measured. . . . III SIST EN ISO 294-1:2000
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