Research on Simulation and Control of Gas Fingering Defect in Gas-assisted Injection Molding of Multi-rib Comb Shaped Part

SHEN Zu-yan; WANG Zi-qin; XIA Qin-xiang; XIAO Gang-feng; CHENG Xiu-quan

doi:10.14028/j.cnki.1003-3726.2024.23.253

您当前的位置：

首页 >

文章列表页 >

Research on Simulation and Control of Gas Fingering Defect in Gas-assisted Injection Molding of Multi-rib Comb Shaped Part

更新时间：2024-02-06

- Research on Simulation and Control of Gas Fingering Defect in Gas-assisted Injection Molding of Multi-rib Comb Shaped Part
- Polymer Bulletin Vol. 37, Issue 3, Pages: 345-357(2024)
- 作者机构：
  
  1..明门(中国)幼童用品有限公司，东莞 523648
  2..华南理工大学机械与汽车工程学院，广州 510640
  3..广州民航职业技术学院飞机维修工程学院，广州 510403
- 作者简介：
- 基金信息：
- DOI：10.14028/j.cnki.1003-3726.2024.23.253
  CLC：
- Received：19 July 2023，
  
  Accepted：21 August 2023，
  
  Published：20 March 2024
- 稿件说明：
移动端阅览
沈祖炎, 王子秦, 夏琴香, 肖刚锋, 程秀全. 多筋梳形件气辅成型气指缺陷模拟与控制研究. 高分子通报, 2024, 37(3), 345–357

Shen, Z. Y.; Wang, Z. Q.; Xia, Q. X.; Xiao, G. F.; Cheng, X. Q. Research on simulation and control of gas fingering defect in gas-assisted injection molding of multi-rib comb shaped part. Polym. Bull. (in Chinese), 2024, 37(3), 345–357
沈祖炎, 王子秦, 夏琴香, 肖刚锋, 程秀全. 多筋梳形件气辅成型气指缺陷模拟与控制研究. 高分子通报, 2024, 37(3), 345–357 DOI： 10.14028/j.cnki.1003-3726.2024.23.253.

Shen, Z. Y.; Wang, Z. Q.; Xia, Q. X.; Xiao, G. F.; Cheng, X. Q. Research on simulation and control of gas fingering defect in gas-assisted injection molding of multi-rib comb shaped part. Polym. Bull. (in Chinese), 2024, 37(3), 345–357 DOI： 10.14028/j.cnki.1003-3726.2024.23.253.

摘要

多筋梳形件具有多加强筋及中空的复杂结构，传统注射成型难以获得良好的成型效果，故通常采用气辅成型作为制造工艺。然而，复杂结构下的气辅成型将产生气指缺陷，严重制约零件成型质量。以某多筋梳形件小腿靠为研究对象，针对零件气指缺陷，基于对产品的结构设计和成型技术方法的分析，对气指缺陷的形成原因进行了理论分析；基于Moldflow软件建立了小腿靠有限元模型，对气指形成进行有限元分析；基于薄化壁厚原则，改进了主体壁厚和加强筋壁厚，并提出了火山口减胶方案。结果表明，随着主体壁厚和加强筋壁厚的减少，气指缺陷得到改善。采用火山口减胶方案可在消除气指缺陷的基础上避免大面积减薄。试模验证了局部减薄可加快零件冷却，形成有效冻结层，从而消除气指缺陷。

Abstract

Multi-rib comb shaped parts have a complex structure with multiple ribs and hollow cavities

and traditional injection molding is difficult to achieve good molding results. Therefore

gas-assisted injection molding is usually used as the manufacturing process. However

gas assisted forming under complex structures will produce gas finger defects

seriously restricting the quality of part forming. Taking the calf support of a multi-rib comb shaped part as the research object

aiming at the gas finger defect of the part

based on the analysis of the structural design of the product and the molding technology

the formation mechanism of gas finger defect was analyzed theoretically. Based on Moldflow software

the finite element model of calf support was established to analyze the formation mechanism of gas finger. Based on the principle of thinning wall thickness

the wall thickness of the main body and the wall thickness of ribs were improved

and the scheme of reducing glue in the crater was proposed. The results show that with the thickness of the main body and the wall thickness of ribs decrease

the gas fingering is improved. The use of volcanic crater glue reduction scheme can avoid large-scale thinning while eliminating gas fingering defects. The test mold has verified that local thinning can accelerate the cooling of parts

form an effective freezing layer

and thus eliminate gas fingering defects.

关键词

Keywords

references

王博伦 , 王韬 , 葛勇 , 相宁 , 孙琦伟 , 颜悦 . 厚壁结构聚碳酸酯制品注射成型的典型缺陷与控制 . 高分子材料科学与工程 , 2020 , 36 ( 8 ), 130 – 137 .

任清海 , 耿铁 . 注气时间对气辅成型气体穿透影响的数值模拟和实验研究 . 塑料科技 , 2019 , 47 ( 8 ), 76 – 79 .

任清海 , 耿铁 . 延迟时间对气辅注射成型气体穿透行为影响的数值模拟和实验研究 . 中国塑料 , 2016 , 30 ( 8 ), 70 – 74 .

S. C. Nian, ; M. H. Li, ; M. S. Huang, Warpage control of headlight lampshades fabricated using external gas-assisted injection molding . Int. J. Heat Mass Transf. , 2015 , 86 , 358 – 368 .

E I. Orozco A study on gas penetration and fingering behavior in injection molding of polymer and powder metal feedstock . The University of Texas-Pan American , 2009 .

C. C. Hsu, ; C. T. Huang, ; R. Y. Chang, Simulation of dynamic gas penetrations on fingering behaviors during gas-assisted injection molding . J. Polym. Eng. , 2018 , 38 ( 1 ), 93 – 105 .

傅莹龙 . 基于气辅技术与正交试验的汽车门把手成型工艺优化 . 模具制造 , 2022 , 22 ( 12 ), 37 – 40 .

梁继才 , 李义 , 苏梅 , 陈晋市 , 柳承德 . 气辅成型中气道形状和尺寸对气指缺陷的影响 . 吉林大学学报(工学版) , 2007 , 37 ( 4 ), 809 – 813 .

王子剑 , 任清海 , 耿铁 . 气辅注塑成型过程中温度参数优化设计及实验研究 . 塑料工业 , 2022 , 50 ( 5 ), 125 – 129 .

尹红灵 , 吴国洪 . 汽车门把手的气辅注射成型工艺优化 . 模具技术 , 2018 , ( 5 ), 46 – 50 .

S. M. Chao, ; S. M. Wang, ; S. C. Chen, Dynamic modeling of a gas pressure control system for a gas-assisted injection molding process . Polym. Eng. Sci. , 2000 , 40 ( 3 ), 583 – 594 .

孙志斌 . 气体辅助注射成型装置及其关键技术研究 . 长春 : 吉林大学辊锻工艺研究所 , 2001 ．

吴博达 , 梁继才 , 李义 , 陈立恒 , 付沛福 . 气辅成型延迟时间与气指的关系 . 吉林大学学报(工学版) , 2004 , 34 ( 2 ), 268 – 271 .

张琳 . 塑料制品上的BOSS柱设计 . 模具工业 , 2016 , 42 ( 10 ), 56 – 59 .

Views

601

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

The Basic Theory and Application Example for the Gas-assisted CAE Tecnology

Mechanism Analysis of the Skin Melt Formation During Gas-assisted Injection Molding

Related Author

Li-tang YAN

Fa-qian LIU

Bo LIU

Yong XIN

He-sheng LIU

Guo-tai YANG

Cheng-hong HE

Related Institution

Material College,Tianjin University

Key Lab of New Material in QDICT

Mechanical Electronics Engineering College, Nanchang University

⁰