基于SLS的随形冷却通道注射模间接快速制造技术  

Indirect rapid manufacture of injection mould with conformal cooling channels based on SLS

作　　者：程蓉[1,2] 伍晓宇[2] 郑建平[2] 

机构地区：[1]华中科技大学材料成形与模具技术国家重点实验室,湖北武汉430074 [2]深圳大学机电与控制工程学院,广东深圳518060

出　　处：《模具工业》2011年第4期70-75,共6页Die & Mould Industry

基　　金：广东省教育部产学研结合项目(2009B090300356)

摘　　要：介绍了在广泛考察国内外制造随形冷却通道注射模技术的基础上,摈弃普遍采用的直接制模技术,提出将选择性激光烧结(SLS)技术和铸造工艺相结合,间接快速制造随形冷却通道注射模的新的制造工艺方法。利用SLS技术对腹膜砂和环氧树脂混加的材料成型注射模的布尔结构铸造砂型,对砂型进行后处理后,浇注铝合金形成模具铸件,最后对模具铸件进行清粉和后处理,完成注射模制造。同传统的随形水路模具制造技术相比较,本方法能成型较为复杂的随形冷却通道,并且由于直接用铝合金铸造成模具,其致密度、强度和尺寸精度相比较传统的脱脂、高温烧结和低温浸渍改性的环氧树脂等工艺方法得到的模具性能大幅度提高。该注射模寿命可达50 000次/副,强度可达588 MPa。从塑件质量可以得出,此工艺是一种快速制造适合小批量生产注射模的切实可行的方法。Based on extensive survey of the manufacturing technology at home and abroad for injection mould with conformal cooling channels,a widely adopted direct molding technology was abandoned and a new indirect manufacturing process combining selective laser sintering（SLS） technology and casting technology was put forwarded for injection mould with conformal cooling channels.SLS technology was used in peritoneal and epoxy resin sand mixed material for forming Boolean structure of sand of injection mould;after post-processing of sand casting,alimium alloy was applied and mould casting was formed,finally the powder of casting was cleaned and the last post-processing process for manufacturing an injection mould was completed.Compared with traditional conformal cooling channels mould manufacturing technology,this method can form more complex conformal cooling channels;and because of the direct mould forming by aluminium alloy casting,the density,strength and dimension precision of the mould are increased greatly compared to that from traditional degreasing,high temperature sintering and dipping of modified epoxy resin process.The injection mould can operate 50 000 times and the strength readhes 588 MPa.Therefore,the process is proved to be a feasible way to manufacture injection mould for small batch production.

关 键 词：快速制造 选择性激光烧结(SLS) 注射模 随形冷却水道 

分 类 号：TG76[金属学及工艺—刀具与模具] TG241