Optimization of Processing Parameters for Minimizing Warpage of Large Thin-walled Parts in Whole Stages of Injection Molding

Tong Wen; Xia Chen; Chen Yang; Lan-tao Liu; Liang Hao

doi:10.1007/s10118-014-1541-7

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Optimization of Processing Parameters for Minimizing Warpage of Large Thin-walled Parts in Whole Stages of Injection Molding

Updated：2021-06-21

- Optimization of Processing Parameters for Minimizing Warpage of Large Thin-walled Parts in Whole Stages of Injection Molding
- Chinese Journal of Polymer Science Vol. 32, Issue 11, Pages: 1535-1543(2014)
- Affiliations：
  
  College of Materials Science and Engineering, Chongqing University, Chongqing 400044, China
  College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, EX4 4QF, United Kingdom
- Author bio：
  
  **Tong Wen (温彤), E-mail: wentong@cqu.edu.cn
- Funds：
- DOI：10.1007/s10118-014-1541-7
  CLC：
- Received：23 January 2014，
  
  Revised：2014-03-08，
  
  Accepted：13 March 2014，
  
  Published：2014-11
- Accepted：
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Tong Wen, Xia Chen, Chen Yang, et al. Optimization of Processing Parameters for Minimizing Warpage of Large Thin-walled Parts in Whole Stages of Injection Molding[J]. Chinese Journal of Polymer Science, 2014, 32(11): 1535-1543.
DOI：

Tong Wen, Xia Chen, Chen Yang, et al. Optimization of Processing Parameters for Minimizing Warpage of Large Thin-walled Parts in Whole Stages of Injection Molding[J]. Chinese Journal of Polymer Science, 2014, 32(11): 1535-1543. DOI： 10.1007/s10118-014-1541-7.

摘要

Abstract

This study investigated total warpage of a type of motorcycle seat support made of polypropylene (PP) during the entire process of injection molding and free-cooling after demolding. Finite element modeling (FEM) analysis for injection molding and its associated thermal deformation was carried out in the study. The effects of processing parameters on warpage occurring in different stages were analyzed by Taguchi optimization method. It was found that packing pressure is the major factor that affects warpage in the injection stage

whereas cooling time is the major factor in free-cooling stage. From an overall evaluation

melt temperature affects the total warpage most

followed by cooling time

packing pressure

packing time and mold temperature. The result proved that optimum parameters for minimizing final warpage of the injected parts can be obtained only when the deformation in the entire manufacturing process is addressed in both molding and demolding stages.

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