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光聚合模塑成型是批量生产微型精密制品的新方法,制品精度取决于材料在成型过程中的收缩量,温度以及压力是成形中的2个重要因素。基于前期开发的设备,研究了光聚合树脂在不同压力、温度下的收缩演化规律,结果表明:提高压力可以使材料总收缩率、收缩速率峰值提高,而对影响成型精度的后期收缩无显著影响,提高温度可以同时增大收缩速率峰值,后期收缩量以及总收缩率。分析得出结论:采用适当的成型温度,提高保压压力可以改善模塑成型制品的精度以及性能。
Photopolymerization Molding is a new method for mass production of micro-precision products. The accuracy of the products depends on the amount of shrinkage, temperature and pressure of the materials during forming. Two important factors in the forming process are photopolymerization molding. Based on the equipment developed earlier, the shrinkage evolution of photopolymerized resin under different pressures and temperatures was studied. The results show that increasing the pressure can increase the total shrinkage rate and the peak value of shrinkage rate, but have no significant effect on the post-shrinkage affecting the molding precision , Increasing the temperature can increase the peak systolic velocity, late systolic volume, and total shrinkage. Analysis concluded that: the appropriate molding temperature, packing pressure can improve the accuracy of molded products as well as performance.