Study on the Performance Verification of PMMA at Different Injection Temperature and Holding Time

注塑成型过程中，不同的工艺参数设置会对制件性能产生不同的影响。针对PMMA材料，采用控制变量法进行生产实验，并对其不同变量下制件的拉伸强度、拉伸模量、弯曲强度、弯曲模量、冲击强度、维卡温度、热变形温度进行测量统计，研究并验证了不同注塑温度和停留时间对其注塑制件性能的影响。结果表明：随着料温的升高，停留时间的加长，PMMA的冲击性能、强度、耐热均有不同程度的下降；结合测试结果及标准要求，建议PMMA注塑料温不要超过260℃。During the injection molding process, different process parameters will have different effects on the performance of the parts. Using the method of controlled variables, production experiments were conducted on PMMA materials, and the tensile strength, tensile modulus, bending strength, bending modulus, impact strength, Vicat temperature, and heat deflection temperature of the parts were measured and statistically analyzed under different variables. The study and verification were conducted on the influence of different injection temperatures and holding times on the injection molding properties of PMMA. The results show that as the material temperature increases and the holding time increases, the impact performance, strength, and heat resistance of PMMA decrease to different degrees; based on the test results and standard requirements, it is recommended that the injection temperature of PMMA not exceed 260˚C.