基于Moldex3D分析模具温度对PP发泡注塑制品的影响
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摘要
对微孔发泡注塑过程进行模具温度控制,对制品进行扫描电子显微镜、弯曲强度、冲击强度、表面粗糙度测试,探讨模具温度对制品的力学性能与泡孔结构的影响。结果表明,当其他工艺参数不变时,提高模具温度,制品的泡孔更加致密,有助于提高制品的弯曲性能和冲击性能并且有助于降低制品表面粗糙度;通过Moldex3D模拟统计泡孔平均直径、密度以及尺寸标准差,验证了模具温度升高时,泡孔尺寸标准差降低,泡孔分布更加均匀;通过模拟验证了当模具温度升高时,泡孔尺寸以及制品减重比变化趋势与实验结果一致。
The PP-foamed injection-molded products were processed by a microcellular foaming injection-molding method, and the effect of mold temperature on the mechanical properties and cell structure of the products were investigated by scanning electron microscopy, bending strength, impact strength and surface roughness. The results indicated that the cells of the products became denser with an increase of mold temperature, which led to an improvement in bending and impact performance but a decrease in surface roughness. The average diameter, density and dimensional standard deviation of the cells were simulated by a Moldex3 D software, and the simulation results indicated that the standard deviation of cell size decreased with an increase of mold temperature, and the cell distribution also became more uniform. Moreover, the simulation also confirmed that that the trend in variation of mold temperature and weight loss ratio of cell was in a good agreement with the experimental results.
The PP-foamed injection-molded products were processed by a microcellular foaming injection-molding method, and the effect of mold temperature on the mechanical properties and cell structure of the products were investigated by scanning electron microscopy, bending strength, impact strength and surface roughness. The results indicated that the cells of the products became denser with an increase of mold temperature, which led to an improvement in bending and impact performance but a decrease in surface roughness. The average diameter, density and dimensional standard deviation of the cells were simulated by a Moldex3 D software, and the simulation results indicated that the standard deviation of cell size decreased with an increase of mold temperature, and the cell distribution also became more uniform. Moreover, the simulation also confirmed that that the trend in variation of mold temperature and weight loss ratio of cell was in a good agreement with the experimental results.
引文
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[8] YETGIN S H, UNAL H, MIMAROGL U A. Influence of Foam Agent Content and Talc Filler on the Microcellular and Mechanical Properties of Injection Molded Polypropylene and Talc Filled Polypropylene Composite Foams[J]. Journal of Cellular Plastics, 2014, 50(6):563-576.
[2] 胡广洪,姜朝东,濮仲佳,等.微细发泡注塑成型工艺与微泡尺寸的关系[J].塑料工业,2007(2):20-22. HU G H, JIANG C D,ZHAI Z J, et al. Relationship Between Microcellular Foaming Injection Molding Process and Cell Size[J].China Plastics Industry, 2007(2):20-22.
[3] 张羽标. 超临界氮气微孔注塑成型工艺参数与制品机械性能研究[D].郑州:郑州大学,2009.
[4] 黄汉雄,杨杏,肖成龙.模腔温度对注塑微孔发泡POM盖板泡孔结构和表面质量的影响[J].高分子学报, 2016(7):903-909. HUANG H X, YANG X, XIAO C L. Effects of Mold Cavity Temperature on Cellular Structure and Surface Quality of Microcellular Injection Molded POM Cover Plates, 2016(7): 903-909.
[5] 胡瑞生,王毅,张翔,等.注塑微发泡制品表面质量和发泡形貌的研究进展[J].工程塑料应用,2016,44(3):135-140. HU R S, WANG Y, ZHANG X, et al. Research Progress on Surface Quality and Foam Morphology of Microcellular Injection Molded Parts[J]. Engineering Plastics Application, 2016, 44(3):135-140.
[6] 翟豪瑞,葛晓宏,陶康.运用Moldex3D流分析改善某空气滤清器成型的表面质量[J].模具工业,2016,42(3):50-54. GENG H R, GE X H, TAO K. Improvement of the Surface Quality of Moldex3D Moldflow an Air Cleaner Based on Analysis[J]. Mold Industry, 2016, 42(3): 50-54.
[7] 唐忠民,宋震熙.注塑模流分析技术现状与Moldex3D软件应用[J].CAD/C AM与制造业信息化,2003(1):57-59. TANG Z M, SONG Z X. Current Status of Injection Molding Analysis Techn- ology and Application of Moldex3D Software[J].CAD/CAM and Manufact- uring Informatiztion,2003(1):57-59.
[8] YETGIN S H, UNAL H, MIMAROGL U A. Influence of Foam Agent Content and Talc Filler on the Microcellular and Mechanical Properties of Injection Molded Polypropylene and Talc Filled Polypropylene Composite Foams[J]. Journal of Cellular Plastics, 2014, 50(6):563-576.