Plastics. Injection moulding of test specimens of thermoplastic materials. Part 1: General principles, and moulding of multipurpose and bar test specimens (ISO 294-1:2017)
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ISO 294-1:2017 specifies the general principles to be followed when injection moulding test specimens of thermoplastic materials and gives details of mould designs for preparing two types of specimen for use in acquiring reference data, i.e. type A1 and type B1 test specimens as specified in ISO 20753, and provides a basis for establishing reproducible moulding conditions. Its purpose is to provide consistent descriptions of the main parameters of the moulding process and to establish a uniform practice in reporting moulding conditions. The particular conditions required for the reproducible preparation of test specimens will vary for each material used and are given in the International Standard for the relevant material or are to be agreed upon between the interested parties. NOTE Interlaboratory tests with acrylonitrile/butadiene/styrene (ABS), styrene/butadiene (SB) and poly(methyl methacrylate) (PMMA) have shown that mould design is an important factor in the reproducible preparation of test specimens.
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Sisällysluettelo
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Apparatus
4.1 Moulds
4.2 Injection-moulding machine
5 Procedure
5.1 Conditioning of material
5.2 Injection moulding
5.3 Measurement of mould temperature
5.4 Measurement of the melt temperature
5.5 Post-moulding treatment of test specimens
6 Report on test-specimen preparation
Annex A Examples of runner configurations (informative)
Annex B Standardized injection-moulding mould components (informative)
Annex C Example of an injection mould (informative)
Annex D Methods for setting the injection moulding parameters (informative)
Annex E Methods of determining the hold pressure and hold time (informative)
ISO 179-1:2010 Plastics -- Determination of Charpy impact properties -- Part 1: Non-instrumented impact test
ISO 20753:2008 Plastics -- Test specimens
ISO 294-2:1996 Plastics -- Injection moulding of test specimens of thermoplastic materials -- Part 2: Small tensile bars
ISO 179-1:2010 Plastics -- Determination of Charpy impact properties -- Part 1: Non-instrumented impact test
ISO 20753:2008 Plastics -- Test specimens
ISO 294-2:1996 Plastics -- Injection moulding of test specimens of thermoplastic materials -- Part 2: Small tensile bars
ISO 294-3:2002 Plastics -- Injection moulding of test specimens of thermoplastic materials -- Part 3: Small plates
ISO 294-4:2001 Plastics -- Injection moulding of test specimens of thermoplastic materials -- Part 4: Determination of moulding shrinkage