Standard Active Last Updated: Jan 13, 2021
ASTM D957-21

Standard Practice for Determining Surface Temperature of Molds for Plastics

Significance and Use

3.1 The properties of molded parts and the ease of producing satisfactory specimens are influenced by the temperature of the mold. It is desirable to know the actual mold temperature, which can differ from the mold temperature control medium.

3.2 The user needs to be aware of temperature differences across the mold/thermocouple interface and at leads, and take appropriate precautions to minimize such differences.


1.1 This practice is intended for determining the temperature at a specified point or points on the surface of the cavity and base of a mold for plastics. By determining the temperature at as many points as deemed necessary, the overall temperature condition of the surface can be determined.

1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.3 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use.

Note 1: There is no known ISO equivalent to this standard.

1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

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Book of Standards Volume: 08.01
Developed by Subcommittee: D20.09
Pages: 2
DOI: 10.1520/D0957-21
ICS Code: 83.200