ASTM D957-95(2000)e1

Standard Practice for Determining Surface Temperature of Molds for Plastics

SCOPE
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 the standard. The values in parentheses are given for information only.
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 and health practices and determine the applicability of regulatory limitations prior to use.
Note 1--There is no similar ISO standard.

General Information

• Status: Historical
• Publication Date: 31-Dec-1999
• ICS: 83.200 - Equipment for the rubber and plastics industries
• Technical Committee: D20 - Plastics
• Drafting Committee: D20.09 - Specimen Preparation

Relations

• Replaces: ASTM D957-95 - Standard Practice for Determining Surface Temperature of Molds for Plastics
• Effective Date: 01-Jan-2000
• Replaced By: ASTM D957-95(2006)e1 - Standard Practice for Determining Surface Temperature of Molds for Plastics
• Effective Date: 01-May-2006
• Referred By: ASTM D731-22 - Standard Test Method for Molding Index of Thermosetting Molding Powder
• Effective Date: 01-Jan-2000
• Referred By: ASTM D3641-21 - Standard Practice for Injection Molding Test Specimens of Thermoplastic Molding and Extrusion Materials
• Effective Date: 01-Jan-2000
• Referred By: ASTM D1896/D1896M-10(2017) - Standard Practice for Transfer Molding Test Specimens of Thermosetting Compounds
• Effective Date: 01-Jan-2000

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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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
e1
Designation:D957– 95(Reapproved 2000)
Standard Practice for
Determining Surface Temperature of Molds for Plastics
This standard is issued under the fixed designation D 957; 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 (e) indicates an editorial change since the last revision or reapproval.
e NOTE—Summary of Changes was added editorially in November 2000.
1. Scope * the mold. It is desirable to know the actual mold temperature
which may be different from the mold temperature control
1.1 This practice is intended for determining the tempera-
medium.
ture at a specified point or points on the surface of the cavity
4.2 The user should be aware of temperature differences
andbaseofamoldforplastics.Bydeterminingthetemperature
acrossthemold/thermocoupleinterfaceandatleadsandshould
at as many points as deemed necessary, the overall temperature
take precautions to minimize such differences.
condition of the surface can be determined.
1.2 The values stated in SI units are to be regarded as the
5. Apparatus
standard. The values in parentheses are given for information
5.1 Pyrometer—Acalibrated surface pyrometer traceable to
only.
a National Institute of Standards and Technology (NIST)
1.3 This standard does not purport to address all of the
standard and accurate to within 61.5°C shall be used.
safety concerns, if any, associated with its use. It is the
responsibility of the user of this standard to establish appro-
6. Procedure
priate safety and health practices and determine the applica-
6.1 The size, shape, and contours of a mold will determine
bility of regulatory limitations prior to use.
the location and number of points at which temperature
NOTE 1—There is no similar ISO standard.
readings should be observed. Take temperature readings at as
many points as deemed necessary to determine the temperature
2. Referenced Documents
condition of the mold surface. At a minimum, it is suggested
2.1 ASTM Standards:
that temperature be measured at the mold center, near the edge,
D 958 Practice for Determining Temperatures of Standard
and at least two different but intermediate points between the
ASTM Molds for Test Specimens of Plastics
center and edge.
6.2 Place the thermocouple of the pyrometer at any speci-
3. Summary of Practice
fied point on the surface of the cavity and base of the mold,
3.1 With the use of a calibrated surface pyrometer, the
making certain that good contact is maintained between the
overall temperature condition of a mold for plastics can be
two (see Note 2). Maintain contact until the scale reaches
determined by taking readings at a specified point or many
equilibrium.Recordthetemperaturereadingonthescaleatthis
points on the mold surfac
...