| Rresearch on Rubber Cold Runner Injection Molding Process |
| Received:June 27, 2022 Revised:June 27, 2022 |
| DOI：10.12136/j.issn.1000-890X.2023.12.0974 |
| Key Words: rubber part；cold runner mold；injection molding process；process parameter |
| Author Name | Affiliation | E-mail | | ZHANG Peng* | CRRC Qingdao Sifang Rolling Stock Research Institute Co.，Ltd | zhangpeng_qd@126.com | | ZHAO Guoyan | CRRC Qingdao Sifang Rolling Stock Research Institute Co.，Ltd | | | WANG Fusheng | CRRC Qingdao Sifang Rolling Stock Research Institute Co.，Ltd | |
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| Abstract: |
| The rubber cold runner injection molding mold and vulcanization process were designed
for longitudinal bump stop rubber parts used in rail vehicles，and the influence of the process parameters
including plasticizing temperature，barrel temperature，primary injection speed and cold runner temperature
on the free height and stiffness of the product was studied through orthogonal test methods. The results
showed that the influence of process parameters on the free height（or shrinkage） of the product was sorted
from large to small as plasticizing temperature，barrel temperature，primary injection speed and cold runner
temperature，while the influence on the stiffness of the product was sorted from large to small as barrel
temperature，plasticizing temperature，cold runner temperature and primary injection speed. This study could
provide a reference for the promotion and application of the rubber cold runner injection molding technology |
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