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1、A Reference number ISO 10724-2:1998(E) INTERNATIONAL STANDARD ISO 10724-2 First edition 1998-11-15 Plastics Injection moulding of test specimens of thermosetting powder moulding compounds (PMCs) Part 2: Small plates Plastiques Moulage par injection dprouvettes en compositions de poudre mouler (PMC)
2、thermodurcissables Partie 2: Petites plaques Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:31:29 MDTNo reproduction or networking permitted without license from IHS -,-,- IS
3、O 10724-2:1998(E) ISO 1998 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 Organizat
4、ion for Standardization Case postale 56 CH-1211 Genve 20 Switzerland Internet isoiso.ch Printed in Switzerland ii Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standard
5、s is normally carried out through ISO 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
6、part in the work. ISO 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 St
7、andard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 10724-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 12, Thermosetting materials. Together with part 1, this part of ISO 10724 cancels and replaces ISO 10724:1994, wh
8、ich has been revised to improve the definition of the injection-moulding parameters and has been restructured to specify two types of ISO 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 ISO moulds descr
9、ibed can all be fitted in existing injection-moulding equipment and have interchangeable cavity plates. As far as possible, the wording of this part of ISO 10724 and its definitions corresponds to that in its counterpart for thermoplastic materials, ISO 294:1996, Plastics Injection moulding of test
10、specimens of thermoplastic materials. Unlike the latter, however, there is no need for the separate moulding of rectangular bars (80 mm 10 mm 4 mm, which should be taken from the central portion of the multipurpose test specimen) and the moulding of small tensile bars ( 60 mm 10 mm 3 mm). Therefore
11、the type B and type C ISO moulds specified in ISO 294 were not included in this part of ISO 10724. Regardless of this, and to avoid confusion, the designation of the different mould types in this part of ISO 10724 and in ISO 294 correspond to each other. ISO 10724 consists of the following parts, un
12、der the general title Plastics Injection moulding of test specimens of thermosetting powder moulding compounds (PMCs): Part 1: General principles and moulding of multipurpose test specimens Part 2: Small plates Annexes A to D of this part of ISO 10724 are for information only. Copyright Internationa
13、l Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:31:29 MDTNo reproduction or networking permitted without license from IHS -,-,- ISOISO 10724-2:1998(E) iii Introduction Many factors in the injection
14、-moulding process which can influence the properties of moulded test specimens and hence the measured values obtained when the specimens are used in a test method. The thermal and mechanical properties of such specimens are in fact strongly dependent on the conditions of the moulding process used to
15、 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 deter
16、mined. Thermosets may show differences in orientation of anisotropic fillers such as short fibres and in curing. Residual (“frozen-in“) stresses in the moulded test specimens may also influence properties. Due to the crosslinking of thermosets, molecular orientation is of less influence on mechanica
17、l properties than it is for thermoplastics. Each of these phenomena must be controlled to avoid fluctuation of the numerical values of the measured properties. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/99725450
18、01 Not for Resale, 04/21/2007 02:31:29 MDTNo reproduction or networking permitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:31:29 MDTNo re
19、production or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISOISO 10724-2:1998(E) 1 Plastics Injection moulding of test specimens of thermosetting powder moulding compounds (PMCs) Part 2: Small plates 1 Scope This part of ISO 10724 specifies two two-cavity moulds, desig
20、nated the type D1 and type D2 ISO moulds, for the injection moulding of small plates measuring 60 mm 60 mm with preferred thicknesses of 1 mm (type D1) or 2 mm (type D2) which can be used for a variety of tests (see annex A). The moulds may additionally be fitted with inserts for studying the effect
21、s of weld lines on the mechanical properties (see annex B). 2 Normative references The following standards contain provisions which, through reference in this text, constitute provisions of this part of ISO 10724. At the time of publication, the editions indicated were valid. All standards are subje
22、ct to revision, and parties to agreements based on this part of ISO 10724 are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 472:1), Plastics Vo
23、cabulary. ISO 2577:1984, Plastics Thermosetting moulding materials Determination of shrinkage. ISO 6603-1: 2), Plastics Determination of puncture impact behaviour of rigid plastics Part 1: Non- instrumented impact test. ISO 6603-2: 3), Plastics Determination of puncture impact behaviour of rigid pla
24、stics Part 2: Instrumented impact test. ISO 10724-1:1998, Plastics Injection moulding of test specimens of thermosetting materials Part 1: General principles and moulding of multipurpose test specimens. 3 Definitions For the purposes of this part of ISO 10724, the definitions given in ISO 472 as wel
25、l as those in ISO 10724-1 apply. 4 Apparatus 4.1 Type D1 and D2 ISO moulds Type D1 and D2 moulds are two-cavity moulds (see Figure 2) intended for the preparation of plates measuring 60 mm 60 mm. The plates produced using these moulds shall have the dimensions given in Figure 1. 1) To be published.
26、(Revision of ISO 472:1988) 2) To be published. (Revision of ISO 6603-1:1985) 3) To be published. (Revision of ISO 6603-2:1989) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:
27、31:29 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 10724-2:1998(E) ISO 2 Key Sp Sprue G Gate R Runner P Pressure sensor Dimensions in mm l Length of plate60 2 1) b Width of plate60 2 1) h Thickness of plate: type D1 mould1,0 0,1 type D2 mould2,0 0,1 1) lG Length of g
28、ate4,0 0,1 2) hG Height of gate(0,75 0,05) h 2) 3) lR Length of runner25 to 30 4) bR Width of runner at gate (b + 6) hR Depth of runner at gateh + (1,5 0,5) l* Unspecified distance lP Distance of pressure sensor from gate5 2 5) 1) These dimensions are for the preferred test specimen used in ISO 6603
29、. 2) See note 1 to subclause 4.1. 3) See note 2 to subclause 4.1. 4) See note 3 to subclause 4.1. 5) The position of the pressure sensor shall be further limited by the following conditions: lP + rP 0 where rP is the radius of the sensor. Figure 1 Details of type D1 and D2 ISO moulds Copyright Inter
30、national Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:31:29 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO ISO 10724-2:1998(E) 3 Key SpSprueMoulding volume VM 30 000
31、 mm3 (at 2 mm thickness) GGateProjected area AP 11 000 mm2 lCis the distance between the lines along which the test specimens are cut from the runners (see notes 4 and 5 to subclause 4.1) Figure 2 Cavity plate for type D1 and D2 ISO moulds The main constructional details of type D1 and D2 ISO moulds
32、 shall be as shown in Figures 1 and 2 and shall meet the following requirements: a)See ISO 10724-1:1998, subclause 4.1.4, item a). b)Not applicable. c)See ISO 10724-1:1998, subclause 4.1.4, item c). d) and e)Not applicable. f)See ISO 10724-1:1998, subclause 4.1.4, item f), but without the last part
33、of the second sentence. g)See ISO 10724-1:1998, subclause 4.1.4, item g), but with reference to ISO 6603. The main dimensions, in millimetres, of the cavities shall be as follows (see also Figure 1): Length: 60 to 62; Width:60 to 62; Depth:type D1 mould1,0 to 1,1 type D2 mould2,0 to 2,1. h) to j)See
34、 ISO 10724-1:1998, subclause 4.1.4, items h) to j). Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/21/2007 02:31:29 MDTNo reproduction or networking permitted without license from IHS -
35、,-,- ISO 10724-2:1998(E) ISO 4 k)Figure 1 shows the position of a pressure sensor P within the cavity, which is mandatory for the measurement of moulding shrinkage only (see ISO 2577). It may be useful, however, in controlling the injection period with any ISO mould see ISO 10724-1:1998, subclause 4
36、.1.4, item k). The pressure sensor shall be flush with the cavity surface in order to avoid interference of the melt flow. l)See ISO 10724-1:1998, subclause 4.1.4, item l). m)See ISO 10724-1:1998, subclause 4.1.4, item m), and annex C of this part of ISO 10724. n)See ISO 10724-1:1998, subclause 4.1.
37、4, item n), and annex D of this part of ISO 10724. NOTES 1 The height and length of the gate strongly influence the process of curing of the melt as it flows into the cavity, and hence the moulding shrinkage (see ISO 2577). The dimensions of the gate are therefore defined with tight tolerances. 2 Ga
38、tes which are severely limited in height have a great influence on the orientation of the material within the cavity, even at large distances from the gate. The change in height at the gate has therefore been fixed at a value which facilitates subsequent measurement of the moulding shrinkage (see IS
39、O 2577). 3 Separating the test specimens from the runner has to be done immediately after removal from the mould cavity. Otherwise, the plates will be irreversibly distorted due to the fact that the shrinkage of the runner and gate is different from that of the plate. 4 The value specified for the g
40、ate length lG allows the two test specimens to be stamped or sawn from the runners with a fixed distance lC between the cuts (see Figure 1), even when the moulding shrinkage varies from one material to another. (It has been shown that it is inadvisable to break off the test specimens from the runner
41、s immediately after removal of the mouldings from the mould because of the deformation this causes in the plates.) 5 The distance lC between the lines along which the test specimens are cut from the runners (see Figure 1) is given by lC = 2(lG + lR + l *) (see Figure 1). Taking this distance as 80 m
42、m gives the advantage that the same cutting device can be used to cut 80 mm 10 mm 4 mm bars from the central sections of multipurpose test specimens see ISO 10724-1:1998, subclause 4.1.3 and subclause 4.1.4, item l). 4.2 Injection-moulding machine See ISO 10724-1:1998, subclause 4.2, with the follow
43、ing exception: In subclause 4.2.4, the recommended minimum locking force FM for type D1 and type D2 ISO moulds is given by FM 11 000 pmax 103; i.e. 880 kN for a maximum melt pressure of 80 MPa. 5 Procedure 5.1 Conditioning of material See ISO 10724-1:1998, subclause 5.1. 5.2 Injection moulding See I
44、SO 10724-1:1998, subclause 5.2, but with the following new text in subclause 5.2.2: For type D1 and D2 ISO moulds, it is recommended that the injection velocity vI be chosen such that the injection time tI is comparable to that used for the type A ISO mould. 6 Report on test-specimen preparation The
45、 report shall include the following information: a)a reference to this part of ISO 10724; b) to h)see ISO 10724-1:1998, clause 6, items b) to h). Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Res
46、ale, 04/21/2007 02:31:29 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO ISO 10724-2:1998(E) 5 Annex A (informative) Recommended applications for small-plate test specimens or parts thereof The type D2 ISO mould is recommended for the preparation of test specimens for u
47、se in determining multiaxial impact properties as described in ISO 6603 (see note 1 to this annex), in determining moulding shrinkage as described in ISO 2577, in preparing specimens of coloured plastics (see note 2), in studying the anisotropy of mechanical and thermal properties (see note 3) and,
48、with the mould fitted with gate inserts, in studying the effects of weld lines (see annex B). The type D1 ISO mould is especially suitable for producing test specimens for use in determining electrical properties (see note 4), water absorption (see note 5) and dynamic mechanical properties (see note 6). NOTES 1 It is proposed that multiaxial impact strength be included with the mechanical properties i