Abstract：In order to study flow behavior of polymer melt in the process of injection molding. The centrifugal plastic impeller of garden submersible motor-pump(LKS-250P)is chosen as the model. Pro/E and Moldflow software are used to complete the 3D modeling, shape of the plastic part and optimize in injection molding numerical simulation. According to the analysis of gate location and principles of gate design, two different types of gating system of impeller were established. The effect of runner systems on the filling cavity pressure, distribution of welding lines and volumetric shrinkage of the plastic impeller were analyzed by means of moldflow software. Some possible defects in the products were predicted based on the numerical simulation. The optimal runner gate and the injecting process parameters were obtained. The research result shows that the side gate is more suitable than the point gate for impeller injection molding. There are short shot at the outlet of impeller blade and through appropriate increasing the melt temperature and mold temperature which can eliminate defects such as short shot. The application of the CAD/CAE technology is provided a reference for the design and production of plastic centrifugal impeller products as well as the similar products. It has certain engineering value for applications.
王洋, 王振伟, 王维军, 叶道星. 叶轮注塑成型模拟及工艺参数优化[J]. 排灌机械工程学报, 2013, 31(9): 747-751.
Wang Yang, Wang Zhenwei, Wang Weijun, Ye Daoxing. Injection molding simulation of plastic impeller and process parameters optimization. Journal of Drainage and Irrigation Machinery Engin, 2013, 31(9): 747-751.
[1]关醒凡.现代泵理论与设计[M].北京:中国宇航出版社,2011:19-20.[2]王洋,王洪玉,徐小敏,等.冲压焊接离心泵叶轮有限元计算[J].排灌机械工程学报,2011,29(2):109-113. Wang Yang, Wang Hongyu, Xu Xiaomin, et al. Finite element computation for impeller of stamping and wel-ding centrifugal pump[J].Journal of Drainage and Irrigation Machinery Engineering,2011,29(2):109-113.(in Chinese)[3]郭晓梅,王春林,杨敏官,等.泵CAD软件的开发研究[J].流体机械,2003,31(3):39-41. Guo Xiaomei, Wang Chunlin, Yang Minguan,et al.The research and development of the pump CAD software[J].Fluid Machinery,2003,31(3):39-41.(in Chinese)[4]刘厚林,关醒凡.我国泵CAD技术的特点及发展[J].流体机械,2002,30(3):26-29. Liu Houlin,Guan Xingfan.The characteristics and deve-lopment on pump CAD technology in the domestic[J]. Fluid Machinery,2002,30(3):26-29.(in Chinese)[5]Lou Z, Jiang H,Ruan X. Development of an integrated knowledge-based system for mold-base design[J]. Journal of Materials Processing Technology, 2004,150(1/2):194-199.[6]Mahajan K R,Knoppers G E, Oosterling J A J,et al. Knowledge based design of EDM electrodes for mould cavities pre-machined by high-speed milling[J]. Journal of Materials Processing Technology, 2004,149(1/2/3):71-76.[7]Eghbal Hakimian, Abu Bakar Sulong. Analysis of war-page and shrinkage properties of injection-molded micro gears polymer composites using numerical simulations assised by Taguchi method[J]. Materials and Design, 2012,42:62-71.[8]谢鹏程.高分子材料注塑成型CAE理论及应用[M].北京:化学工业出版社,2008:1-14.[9]焦令宽,王利霞,李倩,等. 基于ANSYS CFX的注塑成型充填过程三维模拟[J].高分子材料科学与工程,2012,28(3):156-160. Jiao Lingkuan,Wang Lixia, Li Qian, et al. 3D simulation of filling stage in injection molding based on ANSYS CFX[J].Polymer Materials Science and Engineering,2012,28(3):156-160.(in Chinese)[10]沈珏铭,邬耀宗,朱季陶.叶轮强度的有限元法计算[J].杭州大学学报,1989,16(1):21-27. Shen Jueming, Wu Yaozong, Zhu Jitao. The finite element method in the blade-wheel[J]. Journal of Hangzhou University, 1989, 16(1):21-27.(in Chinese)[11]匡唐清.基于模流分析技术的壁挂式扬声器外壳注塑模设计[J].中国塑料,2010,24(6):97-101. Kuang Tangqing. Design of injection mold for wall speaker covers based on moldflow technologies[J].China Plastics, 2010,24(6):97-101.(in Chinese)[12]王刚,单岩. Moldflow模具分析应用实例[M].北京:清华大学出版社,2005.[13]Li J Q, Li D Q,Guo Z Y,et al. Single gate optimization for plastic injection mold[J]. Journal of Zhejiang University: Science A, 2007,8(7):1077-1083.[14]Hamdy Hassan, Nicolas Regnier, Guy Defaye. A 3D study on the effect of gate location on the cooling of polymer by injection molding[J]. International Journal of Heat and Fluid Flow, 2009, 30:1218-1229.[15]杨永顺.塑料成型工艺与模具设计[M].北京:机械工业出版社,2011:96-97.
