Scope: Mold shrinkage is the shrinkage of the polymer as it cools after the molding process. It is typically used to properly machine injection molds so that final. Purchase your copy of ASTM D – 08() as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards. Buy ASTM D R TEST METHOD OF MEASURING SHRINKAGE FROM MOLD DIMENSIONS OF THERMOPLASTICS from SAI.
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The mold shall have at one end a gate 6. Adherence to the specified mold design see 7. Differences in mold shrinkage may also r955-08 observed among the three specimen geometries described in this test method. The benefits of a subscription: Consequently, there may be signicant differences when measuring the specimen at different points around the circumference.
Standards Subsctiption may be the perfect solution. It is recommended to cool specimens in a horizontal position at room temperature by placing them on a material of low thermal conductivity to minimize warpage. A number in parentheses indicates the asrm of last reapproval.
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This standard is not included in any packages. NOTE 3—If the injection machines of appropriate capacity are not available, the requirements of 7.
ASTM D – 08 Standard Test Method of Measuring Shrinkage from Mold Dimensions of Thermoplastics
The values given in parentheses are given for information only. A superscript epsilon indicates an editorial change since the last revision or reapproval. If you feel that your comments have not received a fair hearing you should make d9555-08 views known to the ASTM Committee on Standards, at the address shown below.
You may delete a document from your Alert Profile at any time. Adherence to astk specied mold design see 7. Do not modify or alter the edges used for the measurement of dimensions. Differences in mold shrinkage may also be observed among the three specimen geometries described in this test method. Need more than one copy? If the document is revised or amended, you will be notified by email. The data in Tables should not be 9d55-08 applied to acceptance or rejected of material, as those data are specic to the round robin and may not be representative of other lots, conditions, materials, or laboratories.
Each laboratory obtained one test result for each material. As the voice of the U. The results, including suggested cavity hold pressure for various materials, are e955-08 in Appendix X1. This service is not available if you are a URL user d955-008 you do not asym in with an email address. Link to Active This link will always route to the current Active version of the standard.
Differences in mold shrinkage may also be observed between the three specimen geometries described in this test method. The method also accommodates shrinkage at 24 and 48 h, which may be critical for some materials. If you need to be able to add standards to the monitoring service, you must register as a user with your own username and password. Due to copyright restrictions, we are not able to provide copies of standards.
Mold Shrinkage ASTM D ISO
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Report d9555-08 shrinkage in both ow and cross direction to two signicant gures. Webprint Printed and bound. Factors, such as the amount of material in charge, cooling time, and pressure application are known to affect shrinkage signicantly. Record these values as l and w, respectively.