ASTM D 955 : 2008
Superseded
A superseded Standard is one, which is fully replaced by another Standard, which is a new edition of the same Standard.
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Standard Test Method of Measuring Shrinkage from Mold Dimensions of Thermoplastics
Hardcopy , PDF
11-11-2014
English
11-01-2008
Important note : All end users must be registered with an Account prior to user licenses being assigned.CONTAINED IN VOL. 08.01, 2016 Defines the method intended to measure shrinkage from mold cavity to molded dimensions of thermoplastics when molded by compression or injection processes with specified process conditions.
| Committee |
D 20
|
| DocumentType |
Test Method
|
| Pages |
9
|
| ProductNote |
Reconfirmed 2008
|
| PublisherName |
American Society for Testing and Materials
|
| Status |
Superseded
|
| SupersededBy | |
| Supersedes |
1.1 This test method is intended to measure shrinkage from mold cavity to molded dimensions of thermoplastics when molded by compression or injection processes with specified process conditions.
1.2 This test method covers shrinkage measurements at 24 and 48 h.
1.3 This method will give comparable data based on standard specimens and can not predict absolute values in actual molded parts with varying flow paths, wall thicknesses, pressure and temperature gradients and process conditions. Differences in mold shrinkage may also be observed among the three specimen geometries described in this test method.
1.4 The values stated in SI units are to be regarded as the standard. The values given in parentheses are given for information only.
1.5 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 standard and ISO 294-3 are equivalent in the design of specimen D2. This test method is equivalent to ISO 294-4 where Type D2 specimens and the procedure in Appendix X2 are used.
| ASTM D 618 : 2013 : REDLINE | Standard Practice for Conditioning Plastics for Testing |
| ISO 293:2004 | Plastics — Compression moulding of test specimens of thermoplastic materials |
| ASTM D 788 : 2016 : REDLINE | Standard Classification System for Poly(Methyl Methacrylate) (PMMA) Molding and Extrusion Compounds |
| ISO 294-3:2002 | Plastics Injection moulding of test specimens of thermoplastic materials Part 3: Small plates |
| ASTM D 6778 : 2014 : REDLINE | Standard Classification System and Basis for Specification for Polyoxymethylene Molding and Extrusion Materials (POM) |
| ASTM D 3641 : 2015 : REDLINE | Standard Practice for Injection Molding Test Specimens of Thermoplastic Molding and Extrusion Materials |
| ASTM D 6779 : 2017 : REDLINE | Standard Classification System for and Basis of Specification for Polyamide Molding and Extrusion Materials (PA) |
| ISO 294-4:2001 | Plastics Injection moulding of test specimens of thermoplastic materials Part 4: Determination of moulding shrinkage |
| ASTM D 4066 : 2013 | Standard Classification System for Nylon Injection and Extrusion Materials (PA) |
| ASTM D 4549 : 2015 : REDLINE | Standard Classification System and Basis for Specification for Polystyrene and Rubber-Modified Polystyrene Molding and Extrusion Materials (PS) |
| ISO 294-1:2017 | Plastics — Injection moulding of test specimens of thermoplastic materials — Part 1: General principles, and moulding of multipurpose and bar test specimens |
| ASTM D 4703 : 2016 : REDLINE | Standard Practice for Compression Molding Thermoplastic Materials into Test Specimens, Plaques, or Sheets |
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