ASTM D3641-02

Standard Practice for Injection Molding Test Specimens of Thermoplastic Molding and Extrusion Materials

SIGNIFICANCE AND USE
It is well known that plastic test specimens molded under different conditions can have significantly different properties. This practice is designed to minimize those differences by establishing operating protocols without being unnecessarily restrictive.
Always refer to the ASTM material specification or ISO designation for the material for recommended molding conditions. If not available, consult the material supplier.
This practice requires the use of adequate quantities of plastic material to find desirable operating conditions and to make the desired test specimens.
SCOPE
1.1 This practice covers the general principles to be followed when injection molding test specimens of thermoplastic molding and extrusion materials. This practice is to be used to obtain uniformity in methods of describing the various steps of the injection molding process and to set up uniform methods of reporting these conditions. The exact conditions required to prepare suitable specimens will vary for each plastic material. Those conditions should become a part of the specification for the material, or be agreed upon between the purchaser and the supplier. Any requirements or recommendations in the material specification which differ from this standard take precedence over those in this standard.
1.2 The methodology presented assumes the use of reciprocating screw injection molding machines.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
Note 1—This practice is equivalent to the following parts of ISO 294: Plastics-Injection Moulding of Test Specimens of Thermoplastic Materials; 294-1: Part 1-General Principles and Multipurpose Test Specimens (ISO Type A Mould) and Bars (ISO Type B Mould); ISO 294-2: Part 2-Small Tensile Bars (ISO Type C Mould); ISO 294-3: Part 3-Plates (ISO Type D Moulds).

General Information

• Status: Historical
• Publication Date: 09-Apr-2002
• ICS: 83.080.20 - Thermoplastic materials
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.09 - Specimen Preparation

Relations

• Replaces: ASTM D3641-97 - Standard Practice for Injection Molding Test Specimens of Thermoplastic Molding and Extrusion Materials
• Effective Date: 10-Apr-2002
• Replaced By: ASTM D3641-10 - Standard Practice for Injection Molding Test Specimens of Thermoplastic Molding and Extrusion Materials
• Effective Date: 01-Aug-2010
• Referred By: ASTM D5138-23 - Standard Classification System and Basis for Specification for Liquid Crystal Polymers Molding and Extrusion Materials (LCP)
• Effective Date: 10-Apr-2002
• Referred By: ASTM D4066-13(2019) - Standard Classification System for Nylon Injection and Extrusion Materials (PA)
• Effective Date: 10-Apr-2002
• Referred By: ASTM D3965-21 - Standard Classification System and Basis for Specifications for Rigid Acrylonitrile-Butadiene-Styrene (ABS) Materials for Pipe and Fittings
• Effective Date: 10-Apr-2002
• Referred By: ASTM D6339-11(2019) - Standard Classification System for and Basis for Specifications for Syndiotactic Polystyrene Molding and Extrusion (SPS)
• Effective Date: 10-Apr-2002
• Referred By: ASTM D4673-23 - Standard Classification System for and Basis for Specification for Acrylonitrile–Butadiene–Styrene (ABS) Plastics and Alloys Molding and Extrusion Materials
• Effective Date: 10-Apr-2002
• Referred By: ASTM D787-18 - Standard Specification for Ethyl Cellulose Molding and Extrusion Compounds
• Effective Date: 10-Apr-2002
• Referred By: ASTM D707-15(2023) - Standard Classification System and Basis for Specification for Cellulose Acetate Butyrate Molding and Extrusion Compounds (CAB)
• Effective Date: 10-Apr-2002
• Referred By: ASTM F2617-15 - Standard Test Method for Identification and Quantification of Chromium, Bromine, Cadmium, Mercury, and Lead in Polymeric Material Using Energy Dispersive X-ray Spectrometry
• Effective Date: 10-Apr-2002
• Referred By: ASTM D4067-23 - Standard Classification System and Basis for Specification for Reinforced and Filled Poly(Phenylene Sulfide) (PPS) Injection Molding and Extrusion Materials Using ASTM Methods
• Effective Date: 10-Apr-2002
• Referred By: ASTM D6358-19e1 - Standard Classification System and Basis for Specification for Poly (Phenylene Sulfide) (PPS) Injection Molding, Extrusion and Blow Molding Materials Using ISO Methods
• Effective Date: 10-Apr-2002
• Referred By: ASTM D6394-21a - Standard Classification System for and Basis for Specification for Sulfone Plastics (SP)
• Effective Date: 10-Apr-2002
• Referred By: ASTM D788-16 - Standard Classification System for Poly(Methyl Methacrylate) (PMMA) Molding and Extrusion Compounds
• Effective Date: 10-Apr-2002
• Referred By: ASTM D3419-12(2019) - Standard Practice for In-Line Screw-Injection Molding Test Specimens From Thermosetting Compounds
• Effective Date: 10-Apr-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D3641–02
Standard Practice for
Injection Molding Test Specimens of Thermoplastic Molding
1
and Extrusion Materials
This standard is issued under the fixed designation D3641; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope* D256 Test Methods for Determining the Izod Pendulum
Impact Resistance of Plastics
1.1 This practice covers the general principles to be fol-
D570 Test Method for Water Absorption of Plastics
lowed when injection molding test specimens of thermoplastic
D638 Test Method for Tensile Properties of Plastics
molding and extrusion materials. This practice is to be used to
D648 Test Method for Deflection Temperature of Plastics
obtain uniformity in methods of describing the various steps of
Under Flexural Load in the Edgewise Position
theinjectionmoldingprocessandtosetupuniformmethodsof
D790 Test Methods for Flexural Properties of Unreinforced
reporting these conditions. The exact conditions required to
and Reinforced Plastics and Electrical Insulating Materials
prepare suitable specimens will vary for each plastic material.
D883 Terminology Relating to Plastics
Those conditions should become a part of the specification for
D955 Test Method of Measuring Shrinkage from Mold
the material, or be agreed upon between the purchaser and the
Dimensions of Thermoplastics
supplier.Any requirements or recommendations in the material
D957 Practice for Determining Surface Temperature of
specification which differ from this standard take precedence
Molds for Plastics
over those in this standard.
2.2 ISO Standards:
1.2 The methodology presented assumes the use of recipro-
ISO 3167 Plastics—Preparation and Use of Multipurpose
cating screw injection molding machines.
2
Test Specimens
1.3 The values stated in SI units are to be regarded as the
ISO294-1: Plastics—InjectionMouldingofTestSpecimens
standard. The values given in parentheses are for information
of Thermoplastic Materials—Part 1: General Principles
only.
and Multipurpose Test Specimens (ISO Type A Mould)
1.4 This standard does not purport to address all of the
2
and Bars (ISO Type B Mould)
safety concerns, if any, associated with its use. It is the
ISO294-2: Plastics—InjectionMouldingofTestSpecimens
responsibility of the user of this standard to establish appro-
of Thermoplastic Materials—Part 2: Small Tensile Bars
priate safety and health practices and determine the applica-
2
(ISO Type C Mould)
bility of regulatory limitations prior to use.
ISO294-3: Plastics—InjectionMouldingofTestSpecimens
NOTE 1—This practice is equivalent to the following parts of ISO 294:
of Thermoplastic Materials—Part 3: Plates (ISO Type D
Plastics—Injection Moulding of Test Specimens of Thermoplastic Mate-
2
Moulds)
2
rials ; 294-1: Part 1—General Principles and Multipurpose Test Speci-
2
mens (ISO Type A Mould) and Bars (ISO Type B Mould) ; ISO 294-2:
3. Terminology
Part 2—Small Tensile Bars (ISO Type C Mould); ISO 294-3: Part
3.1 Definitions—Definitions of terms applying to this prac-
3—Plates (ISO Type D Moulds).
tice appear in Terminology D883.
2. Referenced Documents
3.2 Definitions of Terms Specific to This Standard:
3
2.1 ASTM Standards: 3.2.1 average injection velocity, n—the mean value of the
velocity of the molten plastic flow front within a cavity during
the injection time that is calculated from the shot volume and
1 injection time. (See Terminology D883.)
ThispracticeisunderthejurisdictionofASTMCommitteeD20onPlasticsand
3.2.1.1 Discussion—The average injection velocity is cal-
is the direct responsibility of Subcommittee D20.09 on Specimen Preparation.
Current edition approved April 10, 2002. Published June 2002. Originally
culated as follows:
published as D3641 – 91. Last previous edition D3641 – 97. DOI: 10.1520/D3641-
V
02. s
V 5
2 av
Available from American National Standards Institute, 25 W. 43rd St., 4th T 3 A 3 n
i c
Floor, New York, NY 10036.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
where:
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
V = average injection velocity, mm/s,
av
Standards volume information, refer to the standard’s Document Summary page on 3
V = shot volume, mm ,
s
the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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D3641–02
and measurement of hydraulic pressure, all relevant tempera-
T = injection time, s,
i
2
tures, and the timing of certain cycle elemen
...