中国塑料 ›› 2020, Vol. 34 ›› Issue (4): 70-77.DOI: 10.19491/j.issn.1001-9278.2020.04.012

• 加工与应用 • 上一篇    下一篇

模内装饰薄膜滞热对成型工艺的影响分析

王金坤1,2, 孟正华1,2,3(), 郭巍1,2, 胡豪胜1,2, 周磊4   

  1. 1.武汉理工大学现代汽车零部件技术湖北省重点实验室,武汉 430070
    2.武汉理工大学汽车零部件技术湖北省协同创新中心, 武汉 430070
    3.江林(贵州)高科发展股份有限公司, 贵州 安顺 561100
    4.上汽通用五菱汽车股份有限公司, 广西 柳州 545007
  • 收稿日期:2019-11-28 出版日期:2020-04-26 发布日期:2020-04-26
  • 基金资助:
    国家自然科学基金(51605356);中央高校基本科研业务费专项资金(WUT 2019Ⅲ116CG)、教育部新能源汽车科学与关键技术学科创新引智基地(B17034)

Influence of Film Heat Lag of In⁃mold Decoration on Molding Process

Jinkun WANG1,2, Zhenghua MENG1,2,3(), Wei GUO1,2, Haosheng HU1,2, Lei ZHOU4   

  1. 1.Hubei Key Laboratory of Advanced Technology for Automotive Components, Wuhan University of Technology, Wuhan 430070, China
    2.Hubei Collaborative Innovation Center for Automotive Components Technology, Wuhan University of Technology, Wuhan 430070, China
    3.Jianglin (Guizhou) High?Tech Development Co, Ltd, Anshun 561100, China
    4.SAIC?GM?Wuling Automobile Co, Ltd, Liuzhou 545007, China
  • Received:2019-11-28 Online:2020-04-26 Published:2020-04-26
  • Contact: Zhenghua MENG E-mail:meng@whut.edu.cn

摘要:

以模内装饰技术(IMD)测试平板为研究对象,利用仿真和实验方法分析薄膜滞热的影响因素及薄膜滞热对成型工艺的影响规律。结果表明,薄膜滞热使动模侧模具温度场变化滞后于定模侧温度场,且在实验条件下达到8.6 ℃的最大温度差;薄膜滞热随着模具温度的增加而降低,随熔体温度和薄膜厚度增加而升高;薄膜影响熔体的充模与冷却,造成产品冷却不均的现象;薄膜滞热导致产品翘曲变形增加。

关键词: 模内装饰, 薄膜滞热, 翘曲变形

Abstract:

In this paper, taking the in?mold decoration test plate as a research object, the influence factors of film heat?lag effect and the influence on the molding process were analyzed by simulation and experimental methods. The results indicated that the film heat?lag effect generated the hysteresis of temperature change for the moving mold side compared to the fixed mold side, and there was a maximum temperature difference of 8.6 °C under the experimental conditions. The film heat lag decreased with an increase of mold temperature, but increased with the increase of melt temperature and film thickness. The filling and cooling of the melt were influenced by the film, resulting in uneven cooling of the product. The heat?lag effect of the film led to an increase in warpage of the product.

Key words: in?mold decoration, film heat?lag, warpage

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