以一款小型的塑料滑扣为例，在分析其结构特点的基础上，初步采用斜导柱侧抽芯的结构设计一模四腔的注塑模具，型腔平衡排布，并在定模和动模侧分别设置冷却水管，利用Moldflow以“冷却+填充+保压+翘曲”为序列对塑件的成型过程进行仿真，分析过程中采用3D网格形式。结果表明：4个型腔充填均衡，充满时间为0.489 0 s；塑件体积收缩率整体较小，在侧浇口处最大约3.7%；气穴较少，可利用模具分型面和配合间隙进行排气；熔接线与工艺结合线基本重合；冷却介质出入口温差为0.13 ℃；塑件最大翘曲变形量为0.046 1 mm。最后，根据仿真分析结果，设计一套较为合理的两板式注塑模具。

Based on the analysis of the structural characteristics of a small plastic sliding button, a four-cavity injection mold was designed with a inclined guide pillar side core-pulling structure. The cavities were balanced arrangement. Cooling water pipes were arranged on both the fixed and moving die sides. Moldflow simulation was utilized to analyze the molding process in the sequence of 'cooling+filling+holding+warping' using 3D mesh. The results showed that the four cavities were evenly filled, with a filling time of 0.489 0 s. The overall volume shrinkage rate was relatively small, with a maximum of about 3.7% at the side gate. There were fewer air pockets, and the mold parting surface and fitting gap could be used for exhaust. The fusion line and the process combination line basically overlapped. The temperature difference between the inlet and outlet of the cooling medium was 0.13 ℃. The maximum warpage deformation of the plastic part was 0.046 1 mm. Finally, based on the simulation analysis results, a relatively reasonable two-plate injection mold structure was designed.