EN ISO 10724-1:2001

SLOVENSKI STANDARD
01-februar-2002
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Plastics - Injection moulding of test specimens of thermosetting powder moulding
compounds (PMCs) - Part 1: General principles and moulding of multipurpose test
specimens (ISO 10724-1:1998)
Kunststoffe - Spritzgießen von Probekörpern aus duroplastischen rieselfähigen
Formmassen (PMC) - Teil 1: Allgemeine Grundlagen und Herstellung von
Vielzweckprobekörpern (ISO 10724-1:1998)
Plastiques - Moulage par injection d'éprouvettes en compositions de poudre a mouler
(PMC) thermodurcissables - Partie 1: Principes généraux et moulage d'éprouvettes a
usages multiples (ISO 10724-1:1998)
Ta slovenski standard je istoveten z: EN ISO 10724-1:2001
ICS:
83.080.10 Duromeri Thermosetting materials
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD
EN ISO 10724-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
August 2001
ICS 83.080.10
English version
Plastics - Injection moulding of test specimens of thermosetting
powder moulding compounds (PMCs) - Part 1: General
principles and moulding of multipurpose test specimens (ISO
10724-1:1998)
Plastiques - Moulage par injection d'éprouvettes en Kunststoffe - Spritzgießen von Probekörpern aus
compositions de poudre à mouler (PMC) duroplastischen rieselfähigen Formmassen (PMC) - Teil 1:
thermodurcissables - Partie 1: Principes généraux et Allgemeine Grundlagen und Herstellung von
moulage d'éprouvettes à usages multiples (ISO 10724- Vielzweckprobekörpern (ISO 10724-1:1998)
1:1998)
This European Standard was approved by CEN on 11 June 2001.
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 Management Centre 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 Management Centre 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
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36  B-1050 Brussels
© 2001 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 10724-1:2001 E
worldwide for CEN national Members.

CORRECTED  2002-02-06
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 a 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 February 2002, and conflicting national standards
shall be withdrawn at the latest by February 2002.
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 10724-1:1998 has been approved by CEN as a
European Standard without any modifications.
NOTE Normative references to International Standards are listed in annex ZA (normative).
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of any
of these publications apply to this European Standard only when incorporated in it by amendment or
revision. For undated references the latest edition of the publication referred to applies (including
amendments).
NOTE Where an International Publication has been modified by common modifications, indicated by
(mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 294-1 1996 Plastics — Injection moulding of test EN ISO 294-1 1998
specimens of thermoplastic materials —
Part 1: General principles and moulding of
multipurpose and bar test specimens
ISO 294-2 1996 Plastics — Injection moulding of test EN ISO 294-2 1998
specimens of thermoplastic materials —
Part 2: Small tensile bars
ISO 294-3 1998 Plastics — Injection moulding of test EN ISO 294-3 1998
specimens of thermoplastic materials —
Part 3: Small plates
ISO 3167 1993 Plastics — Multipurpose-test specimens EN ISO 3167 1996
ISO 11403-1 1994 Plastics — Acquisition and presentation of EN ISO 11403-1 1999
comparable multipoint data — Part 1:
Mechanical properties
ISO 11403-2 1995 Plastics — Acquisition and presentation of EN ISO 11403-2 1999
comparable multipoint data — Part 2:
Thermal and processing properties
ISO 472 1999 Plastics – Vocabulary EN ISO 472 2001
ISO 10350-1 1998 Plastics - Acquisition and presentation of EN ISO 10350-1 2000
comparable single-point data - Part 1:
Moulding materials
ISO 10724-2 1998 Plastics - Injection moulding of test EN ISO 10724-2 2000
specimens of thermosetting powder moulding
compounds (PMCs) - Part 2: Small plates
ISO 11403-3 1999 Plastics - Acquisition and presentation of EN ISO 11403-3 2001
comparable multipoint data - Part 3:
Environmental influences on properties
INTERNATIONAL ISO
STANDARD 10724-1
First edition
1998-11-15
Plastics — Injection moulding of test
specimens of thermosetting powder
moulding compounds (PMCs) —
Part 1:
General principles and moulding of multipurpose
test specimens
Plastiques — Moulage par injection d’éprouvettes en compositions de poudre
à mouler (PMC) thermodurcissables —
Partie 1: Principes généraux et moulage d’éprouvettes à usages multiples
A
Reference number
ISO 10724-1:1998(E)
ISO 10724-1:1998(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO
member bodies). The work of preparing International 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 ISO, also take 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 Standard requires approval by at least 75 % of the member bodies casting a vote.
International Standard ISO 10724-1 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee
SC 12, Thermosetting materials.
Together with part 2, this part of ISO 10724 cancels and replaces ISO 10724:1994, which 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 described 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 specimens of thermoplastics
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) or for
the moulding of small tensile bars (> 60 mm · 10 mm · 3 mm). Therefore the type B and type C ISO moulds
specified in ISO 294 have not been 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, under 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.
©  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 Organization for Standardization
Case postale 56 • CH-1211 Genève 20 • Switzerland
Internet  iso@iso.ch
Printed in Switzerland
ii
©
ISO ISO 10724-1:1998(E)
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 and length 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.
iii
©
INTERNATIONAL STANDARD  ISO ISO 10724-1:1998(E)
Plastics — Injection moulding of test specimens of thermosetting
powder moulding compounds (PMCs) —
Part 1:
General principles and moulding of multipurpose test specimens
1  Scope
This part of ISO 10724 specifies the general principles to be followed when injection moulding test specimens of
thermosetting powder moulding compounds (PMCs) and gives details of mould designs for preparing one type of
specimen for use in establishing reproducible moulding conditions. Its purpose is to promote uniformity in describing
the main parameters of the moulding process and also to establish uniform practice in reporting moulding
conditions. The particular conditions required for the reproducible preparation of test specimens which will give
comparable results will vary for each material used. These conditions are given in the International Standard for the
relevant material or are to be agreed upon between interested parties.
NOTE  ISO round-robin tests with phenolic (PF), urea-formaldehyde (UF), melamine (MF), melamine phenolic (MP) and
unsaturated-polyester (UP) injection-moulding materials have shown that mould design is an important factor in the
reproducible preparation of test specimens.
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 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 294-2:1996, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 2: Small tensile
bars.
ISO 294-3:1996, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 3: Small plates.
1)
ISO 472:— , Plastics — Vocabulary.
ISO 2577:1984, Plastics — Thermosetting moulding materials — Determination of shrinkage.
ISO 3167:1993, Plastics — Multipurpose test specimens.
ISO 10350-1:1998, Plastics — Acquisition and presentation of comparable single-point data — Part 1: Moulding
materials.
1)  To be published. (Revision of ISO 472:1988)
©
ISO
ISO 10724-1:1998(E)
ISO 10724-2:1998, Plastics — Injection moulding of test specimens of thermosetting materials — Part 2: Small plates.
ISO 11403-1:1994, Plastics — Acquisition and presentation of comparable multipoint data — Part 1: Mechanical
properties.
ISO 11403-2:1995, Plastics — Acquisition and presentation of comparable multipoint data — Part 2: Thermal and
processing properties.
2)
ISO 11403-3:— , Plastics — Acquisition and presentation of comparable multipoint data — Part 3: Environmental
influences on properties.
3  Definitions
For the purposes of this part of ISO 10724, the definitions given in ISO 472 as well as the following apply.
3.1 mould temperature, T : The average temperature of the mould cavity surfaces measured after the system has
C
attained thermal equilibrium and immediately after opening the mould.
It is expressed in degrees Celsius (°C).
3.2 melt temperature, T : The temperature of the plasticized material in a free shot.
M
It is expressed in degrees Celsius (°C).
3.3 melt pressure, p: The pressure of the plastic material in front of the screw at any time during the moulding
process (see Figure 1).
It is expressed in megapascals (MPa).
The melt pressure, which is generated hydraulically for instance, can be calculated from the force F acting
S
longitudinally on the screw using equation (1):
41··0 F
S
p = (1)
p· D
where
p is the melt pressure, in megapascals (MPa);
F is the longitudinal force, in kilonewtons (kN), acting upon the screw;
S
D is the screw diameter, in millimetres (mm).
3.4 hold pressure, p : The melt pressure during the hold time (see Figure 1).
H
It is expressed in megapascals (MPa).
3.5 moulding cycle: The complete sequence of operations in the moulding process required for the production of
one set of test specimens (see Figure 1).
3.6 cycle time, t : The time required to carry out a complete moulding cycle.
T
It is expressed in seconds (s).
The cycle time is the sum of the injection time t , the cure time t and the mould-open time t .
I CR O
2)  To be published.
©
ISO
ISO 10724-1:1998(E)
Key
1 Melt pressure, p 6 Cycle time, t
T
2 Longitudinal position of the screw 7 Open time, t
O
3 Injection time, t 8 Mould opening
l
4 Hold time, t 9 Mould closing
H
5 Cooling time, t 10 Hold pressure, p
CR H
Figure 1 — Schematic diagram of an injection-moulding cycle, showing the melt pressure (full line)
and the longitudinal position of the screw (dashed line) as a function of time
3.7 injection time, t : The time from the instant the screw starts to move forward until the switchover point between
I
the injection period and the hold period.
It is expressed in seconds (s).
3.8 cure time, t : The time from the end of the injection period until the mould starts to open.
CR
It is expressed in seconds (s).
3.9 hold time, t : The time from the end of the injection period until the hold pressure p is released.
H
H
It is expressed in seconds (s).
3.10 mould-open time, t : The time from the instant the mould starts to open until the mould is closed and exerts
O
the full locking force.
It is expressed in seconds (s).
It includes the time required to remove the mouldings from the mould.
3.11 cavity: The part of the hollow space in a mould that produces one specimen.
3.12 multi-cavity mould: A mould that contains two or more identical cavities in a parallel-flow arrangement
(see Figure 2).
The number of cavities in one multi-cavity mould is given by n.
Identical flow-path geometries and symmetrical positioning of the cavities in the cavity plate ensure that all test
specimens from one shot are equivalent in their properties.
©
ISO
ISO 10724-1:1998(E)
Dimensions in millimetres
Key
1 Preferably 82
Sp sprue
G gate
P pressure sensor (optional)
Shot capacity V ' 30 000 mm
S
Projected area A ' 6 300 mm
P
Figure 2 — Cavity plate for a type A ISO mould
3.13 ISO mould: Any one of several standard moulds (designated type A, D1 and D2) intended for the reproducible
preparation of test specimens with comparable properties. The moulds have a fixed plate with a central sprue, plus
a multi-cavity cavity plate as described in 3.12. Additional details are given in 4.1.4.
An example of a complete mould is shown in annex C.
3.14 critical cross-sectional area, A : The cross-sectional area of the cavity in a multi-cavity mould at the position
C
where the critical portion of the test specimen, i.e. that part on which the measurement will be made, is moulded.
It is expressed in square millimetres (mm ).
For tensile bar test specimens, for instance, the critical portion of the test specimen is the narrow section which is
subj
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