• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2017, Vol. 53 ›› Issue (18): 49-56.doi: 10.3901/JME.2017.18.049

• 材料科学与工程 • 上一篇    下一篇

成型参数对聚合物注塑成型中困气特性影响的可视化分析

鲁勇, 姜开宇, 左军超, 王敏杰   

  1. 大连理工大学模塑制品教育部工程研究中心 大连 116024
  • 收稿日期:2016-09-08 修回日期:2017-05-12 出版日期:2017-09-20 发布日期:2017-09-20
  • 通讯作者: 姜开宇(通信作者),男,1971年出生,博士,副教授.主要研究方向为先进成形技术.E-mail:jiangky@dlut.edu.cn
  • 作者简介:鲁勇,男,1987年出生,博士研究生.主要研究方向为高分子材料成型技术.E-mail:218492427@sina.com.cn
  • 基金资助:
    国家自然科学基金(51475071)和国家重点基础研究发展计划(973计划,2012CB025905)资助项目。

Visualization Analysis for the Influence of Molding Parameters on the Characteristics of Trapped Gas in Injection Molding

LU Yong, JIANG Kaiyu, ZUO Junchao, WANG Minjie   

  1. Engineering Research Center of Plastic Molding Products of the Ministry of Education, Dalian University of Technology, Dalian 116024
  • Received:2016-09-08 Revised:2017-05-12 Online:2017-09-20 Published:2017-09-20

摘要: 注塑成型的过程中,困气现象是制约制件性能的一个关键因素。以带凸台的环形制件的注塑成型过程为研究对象,通过可视化装置直接观察熔体在型腔内充型流动时困气行为的动态过程,探究成型参数(熔体温度、模具温度)对困气现象的影响机理。试验结果表明,在一定的模具温度和熔体温度的范围内,提高注射速度可以降低困气面积和困气位置距离;低速注射时,提高熔体温度或模具温度都可以降低困气面积和困气位置距离;高速注射时,随着熔体温度不断上升困气区域的面积和困气距离呈先上升后下降的趋势,而提高模具温度则会导致困气区域的面积距离不断增大。

关键词: 可视化, 困气现象, 注射成型

Abstract: Trapped gas phenomenon is one of the key factors that restrict the performance of the workpiece produced by injection molding. The injection molding process of ring parts with lug boss is taken as the research object. The influence of molding parameters (melt temperature, mold temperature) on the mechanism of trapped gas is explored by directly observing the dynamic process of gas trapped in the melt filling process with the visualization device. The experimental results show that increase of the injection speed can reduce the trapped gas area and the distance of the trapped gas in the certain range of mold temperature and melt temperature. In the case of low injection speed, improving the melt temperature or mold temperature can reduce the trapped gas area and the distance of the trapped gas. Under high injection speed, the area of the trapped gas and the distance of the trapped gas increased firstly and then decreased with the increasing of the melt temperature. The area of the trapped gas increased with the increasing of the mold temperature.

Key words: injection molding, trapped gas phenomenon, visualization

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