具有内置随形冷却水道注塑模具快速制造.pdf

学兔兔 第26卷第5期 粉末冶金技术 V01．26．NO．5 2008年1O月 Powder Metallurgy Technology 0ct．2008 具有内置随形冷却水道的注塑模具快速制造* 刘锦辉 )， ) 史玉升 陈继兵 ) 1)(黑龙江科技学院机械工程学院，哈尔滨 150027) 2)(华中科技大学材料成形与模具技术国家重点实验室，武汉 430074) 摘 要： 采用选择性激光烧结(SLS)技术烧结混加高分子粘结剂粉末的普通铁粉成形注塑模具形坯，而后 形坯经过脱脂、高温烧结、浸渍改性环氧树脂和浸渍后树脂的固化完成注塑模具制造。笔者对模具的强度和 精度进行了分析研究。该方法综合了快速成形制造(Rapid PrototypingManufacturing，RPM)技术的快捷 性和SIS技术自身的优点，既可以缩短制造注塑模具的周期，又能够随塑料件的形状轮廓设置模具中的冷却 水道，从而既加快了商家对于市场需求的反应速度，又提高了注塑效率和注塑件的质量，是一种快速制造适合 小批量生产的注塑模具的切实可行的方法。 关键词：快速制造；选择性激光烧结；注塑模具；随形冷却水道 Rapid manufacture injection mould with built·in conformal cooling channels Liu Jinhui )- ，Shi Yusheng2)，Chen Jibing2) 1)(College of Mechanical Engineering，Heilongjiang University of Science and Technology，Harbin 150027，China) 2)(State Key Laboratory of Plastic Forming Simulation and DieMould Technology，School of Material Science and Engineering，Huazhong University of Science and Technology，Wuhan 430074，China) Abstract：Injection mould manufacturing encounters the growing competition today，while a rapid way of producing injection mould may win the advantages for it．In this paper，green part of injection mould with conformal cooling channels is manufactured by selective laser sintering(SLS)of commonly used iron powder mixed with polymer powder，and then end—use mould is attained after the green part is debound，sintered at high temperature and infiltrated with modified epoxy resin．The strength and accuracy o