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材料工程  2008 

微注射浇注系统对微制件熔接缝形成的影响的模拟研究

Keywords: 微注射模具,熔接缝,浇口,微流道,MEMS

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Abstract:

微塑件的需求逐年增加,微注射是批量生产高精度微塑件的主要手段,但与宏观注射方法相比,制件尺寸的微小化也给微注射在理论、工艺、设备、检测等方面带来了难题.浇注系统、熔接缝的位置和数目是影响微制件质量的主要因素,本工作就此进行了数值模拟,得出了微成型与传统注射成型工艺参数的差异.结果表明微注射成型的温度、压力和速度均高于传统注射成型,微注射成型过程中温度是保证微注射能否顺利进行的关键,微注射成型的模具温度必须高于聚合物材料的玻璃化转变温度,因此对微注射成型必须进行有效温控.

References

[1]  GEIGER M,KLEINER M,ECKSTEIN R,et al.Microforming[J].Annals of the CIRP,2001 50(2):445-462.
[2]  MICHAELI W,SPENNEAMAN A.A new injection molding technology for micro parts[J].Journal of Polymer Engineering,2001,21(2-3):87-98.
[3]  HO C M,TAI Y C.Micro-electro-mechanical-systems (MEMS) and fluid flows[J].Annual Review of Fluid Mechanics,1998 30:579-612.
[4]  HILL S D J.Computer modeling for micro-injection molding[R].LIGA News Third Issue,1995,9.
[5]  SHEN Y K,WU W Y.An analysis of the three-dimensional micro-injection mold[J].International Communications in Heat and Mass Transfer,2002,29(3):423-431.
[6]  YAO D,KIM B.Simulation of the filling process in micro channels for polymer material[J].Journal of Micromechanics and Microengineering,2002,12:604-610.
[7]  PIOTTER V,MUELLER K.Performance and simulation of thermoplastic micro injection molding[J].Microsystem Technologies,2002,8:387-390.
[8]  HU B H,TONG K K,NIU X P,et al.Design and optimization of runner and gating systems for the die casting of thin walled magnesium telecommunication parts through numerical simulation[J].Journal of Materials Processing Technology,2000,105:128-133.
[9]  唐志玉.塑料模流变学设计[M].北京:国防工业出版社,1991.5-8.

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