| 型腔气体反压对微孔发泡泡孔结构与制品表面质量的影响 |
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| 引用本文： | 任建平,郑贝贝,傅莹龙,张留伟,蒋晶,李倩. 型腔气体反压对微孔发泡泡孔结构与制品表面质量的影响[J]. 工程塑料应用, 2021, 49(3): 71-76 |
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| 作者姓名： | 任建平 郑贝贝 傅莹龙 张留伟 蒋晶 李倩 |
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| 作者单位： | 台州科技职业学院模具研究所,浙江台州 318020;郑州大学微纳成型技术国际联合研究中心,郑州 450001;台州科技职业学院模具研究所,浙江台州 318020;郑州大学微纳成型技术国际联合研究中心,郑州 450001 |
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| 基金项目： | 2021年浙江省基础公益研究计划项目(LGG21E050001);2019年度高校国内访问工程师项目(FG2019217);2019年台州市科技计划项目(1902gy37)。 |
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| 摘 要： | 设计型腔气体反压辅助微孔发泡注塑(GCP-MIM)成型系统、模具及周边设备,利用这一套系统以聚丙烯(PP)材料为研究对象,研究GCP-MIM工艺对注塑PP试样泡孔结构与表面质量的影响.结果表明,随着气体反压持续时间的延长和气体反压压力的增加,试样泡孔尺寸变小,泡孔密度升高,其中反压持续时间从5 s延长到20 s过程中,...
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| 关 键 词： | 气体反压 微孔发泡 注塑 泡孔尺寸 表面粗糙度 |
Effect of Cavity Gas Counter Pressure on Cell Structure and Product Surface Quality of Microcellular Foaming |
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| Ren Jianping,Zheng Beibei,Fu Yinglong,Zhang Liuwei,Jiang Jing,Li Qian. Effect of Cavity Gas Counter Pressure on Cell Structure and Product Surface Quality of Microcellular Foaming[J]. Engineering Plastics Application, 2021, 49(3): 71-76 |
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| Authors: | Ren Jianping Zheng Beibei Fu Yinglong Zhang Liuwei Jiang Jing Li Qian |
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| Affiliation: | (Mould Research Institute of Taizhou Vocational College of Science and Technology,Taizhou 318020,China;National International Joint Research Center Micro-Nano Moulding Technology,Zhengzhou University,Zhengzhou 450001,China) |
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| Abstract: | Cavity gas counter pressure assisted microcellular injection molding(GCP–MIM)system,mould and peripheral equipment were designed.With polypropylene(PP)material as the research object,this system was used to study the influences of GCP–MIM process on the cell structure and surface quality of the PP injection molded sample.The results show that with the increase of the gas counter pressure duration time and the gas counter pressure,the cell size becomes smaller and the cell density increases,the cell average diameter decreases by 40%when the duration time is extended from 5 s to 20 s,while the cell density is increased by 23%.At the same gas counter pressure,the longer the duration time of the gas counter pressure is,the lower the surface roughness of the sample is.Different from conventional injection molding,the farther away from the gate,the lower the surface roughness of GCP–MIM sample is.Compared with the traditional microcellular foaming injection molding,the surface roughness of GCP–MIM sample is significantly reduced,which indicates the surface quality is significantly improved. |
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| Keywords: | gas counter pressure microcellular foaming injection molding cell size surface roughness |
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