中国塑料 ›› 2025, Vol. 39 ›› Issue (8): 41-46.DOI: 10.19491/j.issn.1001-9278.2025.08.007

• 材料与性能 • 上一篇    下一篇

聚苯乙烯化学发泡注射成型研究

朱大韶1, 罗宝树1, 徐敬一1(), 杨雅凤1, 王武聪2, 汪胜旺1, 陈剑波1, 葛福炯1   

  1. 1.余姚华泰橡塑机械有限公司,浙江 余姚 315400
    2.中化石化销售有限公司,上海 200336
  • 收稿日期:2024-09-02 出版日期:2025-08-26 发布日期:2025-07-30
  • 通讯作者: 徐敬一(1954—),男,首席技术执行官,从事微发泡聚合物加工工艺及设备的研究,xu2863@aliyun.com
    E-mail:xu2863@aliyun.com
  • 基金资助:
    年度甬江人才工程科技创新领域创新人才项目(2022A?075?G)

Study on chemical foam⁃injection molding of polystyrene

ZHU Dashao1, LUO Baoshu1, XU Jingyi1(), YANG Yafeng1, WANG Wucong2, WANG Shengwang1, CHEN Jianbo1, GE Fujiong1   

  1. 1.Yuyao Huatai Rubber and Plastics Machinery Co,Ltd,Yuyao 315400,China
    2.Sinochem Petrochemical Distribution Co,Ltd,Shanghai 200336,China
  • Received:2024-09-02 Online:2025-08-26 Published:2025-07-30
  • Contact: XU Jingyi E-mail:xu2863@aliyun.com

摘要:

通过调整液压控制和设计新型螺杆,用最小的成本和最短的时间将常规的200吨的ENGEL注射成型机改造为可用于化学发泡的微泡注射成型机。用国产的环保化学发泡剂(F200E),和通用聚苯乙烯(GPPS)制成了平均泡孔直径为38 μm,发泡倍率1.12,泡孔密度为5.92×106 个/cm3的微泡件。在自由流动的流长比测试模具中,测得化学发泡件的流长比主要与注射速度和有无发泡有关,而化学发泡剂浓度对流长比的影响不大。

关键词: 微发泡注射成型, 聚苯乙烯, 化学发泡剂, 流长比, 注射速度

Abstract:

This study presents a cost⁃effective conversion of a conventional 200⁃ton ENGEL injection molding machine into a microcellular foaming system through hydraulic control system modifications and screw redesign. Using a domestic environmentally friendly chemical blowing agent (FE⁃200) and general⁃purpose polystyrene, microcellular foamed parts were successfully produced with an average cell diameter of 38 μm, a foaming ratio of 1.12, and a cell density of 5.92×10⁶ cells/cm³. Flow⁃to⁃length ratio testing in a free⁃flow mold revealed that injection speed and foaming presence were the dominant factors affecting flow behavior, while chemical blowing agent concentration showed negligible influence. The demonstrated conversion approach provides an economical solution for implementing microcellular chemical foaming technology without requiring expensive specialized equipment.

Key words: microcellular injection molding, polystyrene, chemical blowing agent, flow?length ratio, injection speed

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