SVENSK STANDARD SS-EN ISO 10724-2
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ICS 83.080.10
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Plastics – Injection moulding of test specimens of thermosetting powder moulding compounds (PMCs) – Part 2: Small plates (ISO 10724-2:1998)
The European Standard EN ISO 10724-2:2000 has the status of a Swedish Standard. This docu- ment contains the official English version of EN ISO 10724-2:2000.
Swedish Standards corresponding to documents referred to in this Standard are listed in ”Catalogue of Swedish Standards”, issued by SIS. The Cata- logue lists, with reference number and year of Swedish approval, International and European Standards approved as Swedish Standards as well as other Swedish Standards.
Plast – Formsprutning av prov- kroppar av värmehärdande press- massa i pulverform – Del 2: Små plattor (ISO 10724-2:1998)
Europastandarden EN ISO 10724-2:2000 gäller som svensk standard. Detta dokument innehåller den officiella engelska versionen av EN ISO 10724-2:
2000.
Motsvarigheten och aktualiteten i svensk standard till de publikationer som omnämns i denna stan- dard framgår av ”Katalog över svensk standard”, som ges ut av SIS. I katalogen redovisas interna- tionella och europeiska standarder som fastställts som svenska standarder och övriga gällande svenska standarder.
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN ISO 10724-2
September 2000
ICS 83.080.10
English version
Plastics - Injection moulding of test specimens of thermosetting powder moulding compounds (PMCs) - Part 2: Small plates
(ISO 10724-2:1998)
Plastiques - Moulage par injection d'éprouvettes en compositions de poudre à mouler (PMC) thermodurcissables - Partie 2: Petites plaques
(ISO 10724-2:1998)
Kunststoffe - Spritzgießen von Probekörpern aus duroplastischen rieselfähigen Formmassen (PMC) - Teil 2:
Kleine Platten (ISO 10724-2:1998)
This European Standard was approved by CEN on 8 September 2000.
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 Central Secretariat 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 Central Secretariat has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION C O M I T É E U R O P É E N D E N O R M A L I S A T I O N E U R O P Ä I S C H E S K O M I T E E F Ü R N O R M U N G
Central Secretariat: rue de Stassart, 36 B-1050 Brussels
© 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members.
Ref. No. EN ISO 10724-2:2000 E
Page 2
EN ISO 10724-2:2000
Foreword
The text of the International Standard from Technical Committee ISO/TC 61 "Plastics" of the International Organization for Standardization (ISO) has been taken over as an European Standard by Technical Committee CEN/TC 249 "Plastics", the secretariat of which is held by IBN.
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 March 2001 , and conflicting national standards shall be withdrawn at the latest by March 2001.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of the International Standard ISO 10724-2:1998 has been approved by CEN as a European Standard without any modification.
NOTE: Normative references to International Standards are listed in annex ZA (normative).
Page 3 EN ISO 10724-2:2000
Introduction
Many factors in the injection-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 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. 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 mechanical properties than it is for thermoplastics. Each of these phenomena must be controlled to avoid fluctuation of the numerical values of the measured properties.
Page 4
EN ISO 10724-2:2000
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, designated 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 effects 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 subject 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 — Vocabulary.
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 plastics — 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 well 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. (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)
Page 5 EN ISO 10724-2:2000
Key Sp Sprue G Gate R Runner
P Pressure sensor
Dimensions in mm l Length of plate 60 ± 2 1)
b Width of plate 60 ± 2 1) h Thickness of plate:
type D1 mould 1,0 ± 0,1 type D2 mould 2,0 ± 0,1 1) lG Length of gate 4,0 ± 0,1 2) hG Height of gate (0,75 ± 0,05) ¥ h 2) 3) lR Length of runner 25 to 30 4)
bR Width of runner
at gate ⭓ (b + 6)
hR Depth of runner
at gate h + (1,5 ± 0,5) l* Unspecified distance — lP Distance of pressure
sensor from gate 5 ± 2 5)
1) These dimensions are for the preferred test specimen used in ISO 6603.
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 ⭐ 10 lP - rP ⭓ 0
where rP is the radius of the sensor.
Figure 1 — Details of type D1 and D2 ISO moulds
Page 6
EN ISO 10724-2:2000
Key
Sp Sprue Moulding volume VMª 30 000 mm3 (at 2 mm thickness) G Gate Projected area APª 11 000 mm2
lC is 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 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 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 mould 1,0 to 1,1 type D2 mould 2,0 to 2,1.
h) to j) See ISO 10724-1:1998, subclause 4.1.4, items h) to j).
