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Abstract:
Vulcanization molding has a significant impact on dimensional changes of rubber seals. Numerical anal-ysis of this process can improve dimensional accuracy of molded sealing products. In this study, a stress- strain relationship model that considers thermal expansion, cold contraction, and shrinkage caused by a crosslinking reaction under the constraint of a mold boundary was established, a transient analysis method for thermal-mechanical-chemical coupling of the process from rubber seal vulcanization to mold opening was developed, and dimensional changes of the rubber seal in the mold and after cooling were predicted. Results calculated by the model were verified by the production of typical seals. The influences of vulcanization process parameters on changes in molded seal size were numerically ana-lyzed. The numerical results showed that the dimensional shrinkage ratio increased nonlinearly from 3.2 % to 3.8 % when the vulcanization temperature increased from 165 to 185 degrees C, i.e., an increase of 0.206 % for every 1 % increase in shrinkage caused by the vulcanization reaction. These research results can be utilized in the design of vulcanization molds for high-precision rubber seals. (c) 2022 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
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MATERIALS & DESIGN
ISSN: 0264-1275
Year: 2022
Volume: 224
8 . 4
JCR@2022
7 . 6 0 0
JCR@2023
ESI Discipline: MATERIALS SCIENCE;
ESI HC Threshold:91
JCR Journal Grade:1
CAS Journal Grade:2
Cited Count:
WoS CC Cited Count: 7
SCOPUS Cited Count: 8
ESI Highly Cited Papers on the List: 0 Unfold All
WanFang Cited Count:
Chinese Cited Count:
30 Days PV: 1
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