1、BRITISH STANDARD BS ISO 1268-11:2005 Fibre-reinforced plastics Methods of producing test plates Part 11: Injection moulding of BMC and other long-fibre moulding compounds Small plates ICS 83.120 BS ISO 1268-11:2005 This British Standard was published under the authority of the Standards Policy and S
2、trategy Committee on 16 February 2005 BSI 16 February 2005 ISBN 0 580 45478 9 National foreword This British Standard reproduces verbatim ISO 1268-11:2005 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee PRI/42, Fibre reinfor
3、ced thermosetting plastics and prepregs, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in
4、the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsibl
5、e for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK
6、 interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to v, a blank page, pages 1 to 11 and a back cover. The BSI copyright notice display
7、ed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 1268-11:2005(E) OSI 5002INTERNATIONAL STANDARD ISO 1268-11 First edition 2005-02-01Fibre-reinforced plastics Methods of producing test plates Part 11: Inje
8、ction moulding of BMC and other long-fibre moulding compounds Small plates Plastiques renforcs de fibres Mthodes de fabrication de plaques dessai Partie 11: Moulage par injection de BMC et dautres mlanges mouler longues fibres Plaques de petites dimensions BSISO126811:2005IS-8621 O11:(5002E) DPlcsid
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13、 ttseuqer ehe.r ISO cirypothg fofice saCe tsopale 65 eneG 1121-HC 02 av leT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mail coirypthgiso.o gr We bwww.is.o gro Pulbisdehi n Switlrez dnaii ISO 5002 Allr ithgsr esedevrBSISO126811:2005IS-8621 O11:(5002E) I SO 5002 All irthgs ersedevr iiiContents Page F
14、oreword iv Introduction v 1 Scope 1 2 Normative references . 1 3 Terms and definitions. 1 4 Apparatus. 1 5 Procedure. 4 6 Report on test-specimen preparation . 6 Annex A (informative) Recommended applications for small-plate test specimens or parts thereof 7 Annex B (informative) Weld lines 8 Annex
15、C (informative) Marking of test specimens 9 Bibliography . 11 BSISO126811:2005IS-8621 O11:(5002E) iv I SO 5002 All irthgs ersedevrForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing Intern
16、ational Standards 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
17、 ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical
18、 committees is to prepare International Standards. 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. Attention is drawn to
19、the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 1268-11 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 13, Composites and reinforcement fibre
20、s. Together with the other parts (see below), this part of ISO 1268 cancels and replaces ISO 1268:1974, which has been technically revised. ISO 1268 consists of the following parts, under the general title Fibre-reinforced plastics Methods of producing test plates: Part 1: General conditions Part 2:
21、 Contact and spray-up moulding Part 3: Wet compression moulding Part 4: Moulding of prepregs Part 5: Filament winding Part 6: Pultrusion moulding Part 7: Resin transfer moulding Part 8: Compression moulding of SMC and BMC Part 9: Moulding of GMT/STC Part 10: Injection moulding of BMC and other long-
22、fibre moulding compounds General principles and moulding of multipurpose test specimens Part 11: Injection moulding of BMC and other long-fibre moulding compounds Small plates BSISO126811:2005IS-8621 O11:(5002E) I SO 5002 All irthgs ersedevr vIntroduction Many factors in the injection-moulding proce
23、ss 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 prepare the specimen
24、s. 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. Thermosets may
25、 show differences in orientation and length of anisotropic fillers such as long 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 mechanical propertie
26、s than it is for thermoplastics. Each of these phenomena must be controlled to avoid fluctuation of the numerical values of the measured properties. The principles described in this part of ISO 1268 are the same as those in ISO 10724-2. Only a few details of the moulds have changed, as has specimen
27、thickness, because of the use of long-fibre reinforcements. It is therefore possible to compare the properties of long-fibre moulding compounds with those of thermosetting powder moulding compounds (PMCs) and thermoplastics. BSISO126811:2005blank 5002:118621OSISBINTENRATIONAL TSANDADR IS-8621 O11:(5
28、002E)I SO 5002 All irthgs ersedevr 1Fibre-reinforced plastics Methods of producing test plates Part 11: Injection moulding of BMC and other long-fibre moulding compounds Small plates 1 Scope This part of ISO 1268 specifies two two-cavity moulds, designated the type D1 and type D2 ISO moulds, for the
29、 injection moulding of small plates measuring 60 mm 60 mm with preferred thicknesses of 2 mm (type D1) or 4 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 effects of weld lines on the mechanical properties (see
30、 Annex B). This part of ISO 1268 is intended to be read in conjunction with ISO 1268-1. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition o
31、f the referenced document (including any amendments) applies. ISO 472, Plastics Vocabulary ISO 1268-1, Fibre-reinforced plastics Methods of producing test plates Part 1: General conditions ISO 1268-10:2005, Fibre-reinforced plastics Methods of producing test plates Part 10: Injection moulding of BMC
32、 and other long-fibre moulding compounds General principles and moulding of multipurpose test specimens ISO 2577, Plastics Thermosetting moulding materials Determination of shrinkage 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 472 and ISO 1268-10
33、 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. BSISO126811:2005IS-8621 O11:(5002E) 2 I SO 50
34、02 All irthgs ersedevrKey Sp sprue G gate R runner P pressure sensor Dimensions in mm Dimensions in mm l length of plate 60 2 ah Gheight of gate (0,75 0,05) h b,cb width of plate 60 2 al Rlength of runner 25 to 30 dh thickness of plate: b Rwidth of runner at gate W (b + 6) type D1 mould 2,0 0,1 h Rd
35、epth of runner at gate = h type D2 mould 4,0 0,1 al* unspecified distance l Glength of gate 4,0 0,1 bl pdistance of pressure sensor 5 2 efrom gate aThese dimensions are for the preferred test specimen used in ISO 6603. bSee Note 1 to Subclause 4.1. cSee Note 2 to Subclause 4.1. dSee Note 3 to Subcla
36、use 4.1. eThe position of the pressure sensor shall be further limited by the following conditions: l p+ r pu 10 l p r pW 0 where r pis the radius of the sensor. Figure 1 Details of type D1 and D2 ISO moulds BSISO126811:2005IS-8621 O11:(5002E) I SO 5002 All irthgs ersedevr 3Key Sp sprue G gate l Cis
37、 the distance between the lines along which the test specimens are cut from the runners (see Note 4 to Subclause 4.1) moulding volume V M 30 000 mm 3(at 2 mm thickness) projected area A p 11 000 mm 2Figure 2 Cavity plate for type D1 and D2 ISO moulds The main constructional details of type D1 and D2
38、 ISO moulds shall be as shown in Figures 1 and 2 and shall meet the following requirements: a) The sprue diameter on the nozzle side shall be at least (4,5 0,5) mm. b) The cavities shall be one-end gated as shown in Figure 2. c) The draft angle of the runners shall be (13 3). The cavity shall have a
39、 draft angle not greater than 2. d) The dimensions of the cavities shall be such that the dimensions of the test specimens produced conform to the requirements given in the relevant test standard. To allow for different degrees of mould shrinkage, the dimensions of the cavities shall be chosen so th
40、at they are between the nominal value and the upper limit of the dimensions specified for the specimen concerned. 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 mould 2,0 to 2,1; type D2 mould 4,0 to 4,1
41、. e) Ejector pins shall be located outside the test area of the specimen, i.e. in the area of the runner. BSISO126811:2005IS-8621 O11:(5002E) 4 I SO 5002 All irthgs ersedevrf) The heating system for the mould plates shall be designed so that, under operating conditions, the difference in temperature
42、 between any point on the surface of a cavity and either plate is less than 3 C. g) Interchangeable cavity plates and gate inserts are recommended to permit rapid changes in production from one type of test specimen to another. Such changes are facilitated by using shot capacities V Swhich are as si
43、milar as possible. h) 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). Such a sensor may be useful, however, in controlling the injection period with any ISO mould see ISO 1268-10:2005, Subclause 4
44、.1.4, item k). The pressure sensor shall be flush with the cavity surface in order to avoid interference of the material flow. i) To ensure that cavity plates are interchangeable between different ISO moulds, it is important to note the constructional details given in ISO 1268-10:2005, Subclause 4.1
45、.4, item l), in particular that the width of the mould plates may be affected by the minimum distance required between the connection points for the heating channels. j) To make it easer to check that all the specimens from a mould are identical, it is recommended that the individual cavities be mar
46、ked, but outside the test area of the specimen. This can be done very simply by engraving suitable symbols on the heads of the ejector pins, thus avoiding any damage to the surface of the cavity plate. Another option is shown in Annex C. k) Surface imperfections can influence the results, especially
47、 those of mechanical tests. Therefore, where appropriate, the surfaces of the mould cavities shall be highly polished. The direction of polishing shall correspond to the direction in which the test specimen will be placed under load when it is tested. NOTE 1 The height and length of the gate strongl
48、y influence the process of curing of the plasticized material 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. NOTE 2 Gates which are severely limited in height have a great influence on the orientat
49、ion 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 ISO 2577). NOTE 3 Separating the test specimens from the runner has to be done immediately after removal from the mould c
