新型微发泡气体注射器注气过程可视化研究

doi:10.19491/j.issn.1001-9278.2021.09.020

中国塑料 ›› 2021, Vol. 35 ›› Issue (9): 128-135.DOI: 10.19491/j.issn.1001-9278.2021.09.020

新型微发泡气体注射器注气过程可视化研究

乔林军, 信春玲, 何亚东, 翟玉娇, 闫宝瑞()

北京化工大学机电工程学院，北京 100029

收稿日期:2021-02-01 出版日期:2021-09-26 发布日期:2021-09-23

Visualization Study on Gas Injection Process of A New Type of Micro⁃foaming Gas Injector

QIAO Linjun, XIN Chunling, HE Yadong, ZHAI Yujiao, YAN Baorui()

College of Mechanical and Electrical Engineering，Beijing University of Chemical Technology，Beijing 100029，China

Received:2021-02-01 Online:2021-09-26 Published:2021-09-23
Contact: YAN Baorui E-mail:yanbr@mail.buct.edu.cn

摘要/Abstract

摘要：

气体注射器是微发泡注塑过程中一个重要装置，本文研究了新型气体注射器的注气过程，通过高速摄像和计算机数据采集系统采集的压力曲线分析注气过程，发现气体从气体注射器进入可视化装置时呈分散状态，有利于在微发泡过程中气体与熔体的分散混合。通过压力数据计算注气流量并配合高速摄像图像分析发现，注气压差和初始水压对注气流量影响很大。通过研究注气过程和注气量，发现新型微发泡气体注射器注气过程稳定可控，可用于微发泡注塑实验。

关键词: 微发泡注塑, 可视化, 新型气体注射器, 高速摄像机, 圧力曲线

Abstract:

The gas injector is an important device in the micro?foam injection molding process. This article investigated the gas injection process of a new type of gas injector. The gas injection process was analyzed using a high?speed camera and the pressure curve collected by a computer data acquisition system. The results indicated that the gas entered the visualization device from the gas injector in a dispersed state. This was advantageous to the dispersion and mixing of gas and melt during the micro?foaming process. The gas injection flow rate was calculated by using the pressure data and combined with a high?speed camera image analysis. It was found that the gas injection pressure difference and initial water pressure had a great influence on the gas injection flow rate. Through investigating the gas injection process and the amount of gas injection， the gas injection process of this new type of micro?foaming gas injector was found to be stable and controllable， and it could be used for the micro?foaming injection molding experiments.

Key words: micro?foam injection molding, visualization, the new type of gas injector, high?speed camera, pressure curve

中图分类号:

TQ320.66

乔林军, 信春玲, 何亚东, 翟玉娇, 闫宝瑞. 新型微发泡气体注射器注气过程可视化研究[J]. 中国塑料, 2021, 35(9): 128-135.

QIAO Linjun, XIN Chunling, HE Yadong, ZHAI Yujiao, YAN Baorui. Visualization Study on Gas Injection Process of A New Type of Micro⁃foaming Gas Injector[J]. China Plastics, 2021, 35(9): 128-135.

图/表 15

图1 新型气体注射器的原理示意图

Fig.1 Schematic diagram of the new gas injector principle

图2 微发泡注塑注气系统示意图

Fig.2 Schematic diagram of micro?foam injection molding gas injection system

图3 限流元件示意图

Fig.3 Schematic diagram of the current limiting element

图4 视化装置的三维模型

Fig.4 3D evice imensional model of visualization

图5 可视化实验平台

Fig.5 Visual experiment platform

图6 注气开始后不同时刻的高速图像截图

Fig.6 High?speed images at different time after the start of gas injection

图7 注气结束3 s时的高速图像截图

Fig.7 High?speed image 3 s after gas injection

图8 水压为1 MPa时不同注气压差的流量曲线

Fig.8 Flow curve of different injection pressure at 1 MPa of water pressure

图9 压差为2 MPa时不同初始水压的流量曲线

Fig.9 Different initial water pressure flow curves with a pressure difference of 2 MPa

图10 初始注气量与初始水压、注气压差的关系曲线

Fig.10 Relationship between initial gas injection volume and initial water pressure and pressure difference

图11 后续注气量与初始水压、注气压差的关系曲线

Fig.11 Relationship between subsequent gas injection volume and initial water pressure and pressure difference

限流元件孔径/um	熔体压力/MPa	注气压差/MPa	注气时间/s
200	8	1	1
250	9	1.5	2
300	10	2	3

表1 微发泡注塑实验参数范围

Tab.1 Experimental parameter range of micro?foam injection molding

图12 减重比与影响因素关系曲线

Fig.12 Relationship between weight loss ratio and influencing factors

图13 注气量占比与影响因素关系曲线

Fig.13 The relationship between the proportion of gas injection and influencing factors

关于《中国塑料》改彩印的通知

参考文献 20

1	罗付生.聚合物微发泡成型新技术［J］.新技术新工艺，2009（3）：103⁃105.
	LUO F S. New Technology of Polymer Micro⁃foaming Molding ［J］. New Technology And New Process， 2009（3）： 103⁃105.
2	EDWARD S，CHEN S C，CHANG Y H，et al. Improvement on the Surface Quality of Microcellular Injection Molded Parts using Microcellular Co⁃injection Molding with the Material Combinations of PP and PP⁃GF［J］.International Journal of Plastics Technology， 2017， 21 （2）：239⁃251.
3	张玉霞，王向东，苗春兰.微孔塑料发泡技术［J］.现代塑料加工应用，2002（2）：21⁃24.
	ZHANG Y X，WANG X D，MIAO C L. Microcellular Plastic Foaming Technology［J］. Modern Plastic Processing Applications， 2002（2）：21⁃24.
4	李忠鹏，闫宝瑞，信春玲，等.微发泡注塑气体计量过程中影响初始气涌的关键因素［J］.塑料，2015，44（5）：97⁃100.
	LI Z P，YAN B R，XIN C L，et al. Key Factors of Impacting Initial Gas Surging in SCF Metering of Microcellular Foam Injection Molding［J］. Plastics ，2015，44（5）：97⁃100.
5	孙忠博，信春玲，闫宝瑞，等.微孔发泡注塑注气量控制的理论和实验［J］.塑料，2013，42（5）：80⁃83.
	SUN Z B，XIN C L，YAN B R，et al. Theory And Experiment of Gas Injection Volume of Microcellular Foam Injection Process［J］. Plastics，2013，42（5）：80⁃83.
6	WANG J， CHEN D J. Microcellular Polypropylene Single⁃polymer Composites Prepared by Insert⁃microcellular Injection Molding ［J］.Composites Part A： Applied Science and Manufacturing，2016， 90：567⁃576.
7	YANG W M，JIAN R R，XIE P C.Supercritically Saturated Particle Pneumatic Conveying Micro⁃foaming Injection Molding Device and Method ， CN201611004703 ［P］.2016.
8	SHI S L，WANG Y F， BAI S X， et al. Migration⁃plugging Properties And Plugging Mechanism of Microfoam. 2017， 38（11）：1 656⁃1 664.
9	SHI S L， Wang， WANG Y F ， BAI S X ， et al.Migration⁃plugging Properties and Plugging Mechanism of Microfoam［J］. Journal of Dispersion Science and Technology， 2017，38（11）：1 656⁃1 664.
10	EDWARD S，CHEN S C， LEE K H， et al. Improvements on the Tensile Properties of Microcellular Injection Molded Parts Using Microcellular Co⁃injection Molding with the Material Combinations of PP And PP⁃GF［J］. International Journal of Plastics Technology，2017， 21（2）：351⁃369.
11	GUO W， HE B，MAO H J，et al. Mechanism of Bubble Formation in a Combined In⁃Mold Decoration and Microcellular Foaming Injection Molding Process［J］. Springer Journal，2019，20（7）：1 526⁃1 537.
12	ZHANG L， ZHANG G Q， WANG G L. Formation Mechanism of Porous Structure in Plastic Parts Injected by Microcellular Injection Molding Technology with Variable Mold Temperature［J］. Applied Thermal Engineering，2017， 114：484⁃497.
13	MI H Y， SALICK MAX R.， JING X， et al. Characterization of Thermoplastic Polyurethane/Polylactic Acid （TPU/PLA） Tissue Engineering Scaffolds Fabricated by Microcellular Injection Molding［J］Materials Science and Engineering， 2013， 33（8）：4 767⁃4 776.
14	XIAO C L， HUANG H X， YANG X. Development and Application of Rapid Thermal Cycling Molding with Electric Heating for Improving Surface Quality of Microcellular Injection Molded Parts［J］.Applied Thermal Engineering，2016， 100：478⁃489.
15	刘松高，曹勇，王琛，等.汽车前端模块微发泡注塑成型技术基础研究［J］.汽车工艺与材料，2019（6）：59⁃62，66.
	LIU S G，CAO Y，WANG C，et al. Fundamental Research on Micro⁃foaming Injection Molding Technology of Automotive Front End Module［J］. Automotive Technology And Materials， 2019（6）：59⁃62，66.
16	冯刚，张朝阁，江平.微孔注塑成型技术研究与应用进展［J］.塑料工业，2014，42（10）：9⁃12.
	FENG G，ZAHNG C G，JIANG P，Research Progress and Application of Microcellular Injection Molding Technology［J］， China Plastics Industry，2014，42（10）：9⁃12.
17	LU H L， HU G H. Microcellular Foam Injection Molding Surface Improvement Methods［J］. Atlantis Press，2016.
18	ZHANG L，ZHAO G Q， WANG G L， et al. Investigation on Bubble Morphological Evolution and Plastic Part Surface Quality of Microcellular Injection Molding Process Based on A Multiphase⁃solid Coupled Heat Transfer Model［J］.International Journal of Heat and Mass Transfer，2017， 104：1 246⁃1 258.
19	王如波，王勇，夏欣.微发泡注塑成型技术的研究和应用［J］.橡塑技术与装备，2019，45（10）：30⁃34.
	WANG R B，WANG Y，XIA X.Research and Application of Micro⁃foaming Injection Molding Technology［J］. Rubber and Plastic Technology And Equipment， 2009，45（10）：30⁃34.
20	王滨，蒋顶军.注塑工艺对尼龙6微发泡材料形态结构影响［J］.现代塑料加工应用，2018，30（6）：9⁃12.
	WANG B，JIANG D J.Effects of Injection Process on Morphology and Structure of Nylon 6 Microcellular Mateial［J］. Modern Plastics Processing and Applications， 2018，30（6）：9⁃12.

[1]	孙文博, 信春玲, 何亚东, 翟玉娇, 闫宝瑞. 玻璃纤维增强PBT微发泡工艺对其制品泡孔结构的影响[J]. 中国塑料, 2022, 36(5): 1-7.
[2]	翟玉娇, 信春玲, 何亚东, 闫宝瑞, 乔林军. 聚丙烯/超临界氮气微孔注塑充模过程工艺参数研究[J]. 中国塑料, 2022, 36(3): 69-74.
[3]	翟玉娇, 信春玲, 何亚东, 闫宝瑞, 乔林军. 微发泡注塑制品表面质量的优化研究[J]. 中国塑料, 2022, 36(2): 19-26.
[4]	康维嘉;贺建芸;胡凌骁;李嘉维;杨卫民;谢鹏程. 微流控芯片注射紫外光固化成型中缺陷形成机理及解决方案研究[J]. 中国塑料, 2017, 31(6): 71-78 .
[5]	刘旭辉黄汉雄. 熔体温度对水穿透行为影响的可视化研究[J]. 中国塑料, 2010, 24(04): 65-69 .
[6]	刘旭辉黄汉雄许磊周伟文. 水辅助注射成型中水穿透行为的可视化研究[J]. 中国塑料, 2009, 23(03): 58-61 .
[7]	李维;郭奎;陈红;杨卫民. 基于可视化技术的注射成型冷接痕的研究[J]. 中国塑料, 2008, 22(12): 67-70 .
[8]	祝铁丽;盛占辉;刘永云;王敏杰. 图像处理在注塑制品模内收缩研究中的应用[J]. 中国塑料, 2008, 22(11): 52-55 .
[9]	李维;谢鹏程;丁玉梅;杨卫民;陈红. 基于可视化技术的注射成型熔接痕缺陷的研究[J]. 中国塑料, 2008, 22(1): 63-67 .

新型微发泡气体注射器注气过程可视化研究

Visualization Study on Gas Injection Process of A New Type of Micro⁃foaming Gas Injector

RichHTML

PDF

可视化

摘要/Abstract

引用本文

使用本文

图/表 15

参考文献 20

相关文章 9

编辑推荐

Metrics

本文评价