椎间融合器金属粉末注塑成型工艺参数实验研究

通过密炼机混炼出不同比例金属粉末与粘结剂的金属喂料,对不同配比的金属喂料进行喂料流动性能对比实验,得到最佳注塑成型实验所用的最佳喂料配方,不锈钢粉末占不锈钢喂料质量分数为92.6%时,不锈钢喂料综合性能较好；利用所确定的喂料配方和已加工好的椎间融合器模具在阿博格精密注塑机上进行性能测试,分别控制注塑喂料温度、模具温度、注射压力进行椎间融合器的注射,并对注射结果进行重量测量及注射时间记录,分析出此种配方最适合的注射工艺条件。结果表明：最佳注射工艺参数为：模具温度：50℃；注射压力：70MPa；喂料温度180℃,且用注塑机控制四段加热区间：180/175/170/165℃。

Investigation of Technological Parameters for Intervertebral Fusion Cage Made byMetal Powder Injection Molding

Metal feed contained different proportion of metal powder and binder were prepared by mixer mixing, and its flow properties were determined and compared to get optimal feed formula needed for optimum sintering temperature. The result showed that stainless steel feed comprehensive performance is the best, when the content of stainless metal powder in stainless steel feed was 92.6%. Performance of intervertebral fusion cage with optimum feed formula was tested on precise injection molding machine. Intervertebral fusion cage was injected with different feed temperature, mold temperature and injection pressure, and weight test results and injection time were recorded to get the optimum technological parameters. The result indicated that intervertebral fusion cage performed best when the mold temperature was 50 °C, injection pressure was 70 MPa, feed temperature was 180 °C, four heating section was used for injection temperature, and the temperature of the each section was 180, 175, 170 and 165 °C, respectively.