高分子粉末烧结件的增强后处理的研究

Paste resin bleeding through polymeric powder sintering parts:improving mechanical performance by enhancing the interfacial structure

以高分子粉末为基底材料的烧结件机械性能较差,质脆,其可作为原型测试件,但作为功能测试件则较难达到使用要求。本文在具体研究原型件性能差别的基础上,对其进行树脂增强后处理,以扫描电镜(SEM)为手段,对材料断裂面的形态结构进行了研究,并对体系的形态结构与拉伸性能、冲击之间的关系进行了探讨,优化了后处理条件,得到机械性能为原型烧结件3～4倍的增强烧结件。

Selective laser sintering (SLS) builds prototypes by using a laser to sinter powdered material. The mechanical performance of sintering parts from polymeric powder was very poor. But the parts with post progress can be used to make a variety of functional prototypes. This method was designed to reduce cost and increase accuracy in making prototyping. Mechanical property and microstructure of the selective laser sintering of amorphous polymer composites is investigated. The experiments draw attention to the microstructure with stress and impact toughness properties of sintering part. The mechanical strength of the sintering part was times enhanced with some paste resin.