分析热敏打印机底壳的结构特点，利用UG及Moldflow软件进行建模并模拟注塑成型过程。结果表明：浇口位置由底部中心改为螺纹装配孔处能够有效避免试模时产生的熔接痕，填充效果良好。根据模流分析结果得出，最佳熔体温度为200 ℃，最佳模具温度为80 ℃，最佳注射时间为0.1 s。冷却方式采取带有隔水板的冷却系统，模拟结果显示成型质量符合要求。模具结构采用一模两腔布局，功能动作为一次开模，一次顶出，四向一次抽芯。模具结构整体布局合理，利用该模具生产的注塑制件表面质量及精度均满足设计要求。

The structural characteristics of the thermal printer bottom shell was analyzed, and UG and Moldflow software were utilized for modeling and simulating the injection molding process. The results show that relocating the gate from the bottom center to the threaded assembly hole effectively avoids weld lines during trial molding and achieves good filling effects. Based on the mold flow analysis results, the optimal melt temperature is 200 ℃, the optimal mold temperature is 80 ℃, and the optimal injection time is 0.1 s. Cooling is implemented with a cooling system equipped with water baffles, and the simulation results demonstrate that the molding quality meets the requirements. The mold structure adopts a layout of one mold with two cavities, featuring a single opening action, a single ejection action, and simultaneous four-way core pulling. The overall layout of the mold structure is reasonable, and the surface quality and precision of the injection molded parts produced by this mold meet the design requirements.