橡胶注射成型模具的设计

Mold Design for Rubber Injection Molding

橡胶注射成型模具根据橡胶制品结构、性能和使用要求以及注射成型机性能和工艺参数设计。模腔数量的主要影响因素为橡胶制品质量、投影面积、尺寸精度和产量,注射成型机注射量和锁模力、模具外形尺寸和安装有效面积;模腔排列优先选择等距排列;分型面尽可能避开橡胶制品工作面,分型面越少越好;主浇道中心线和注射成型机喷嘴中心线重合,浇道截面最好为圆形,尽量减小主浇道和分浇道长度,浇口尽量放在橡胶制品最厚部位。

In this paper, the mold for rubber injection molding was designed based on the product structure and property requirements, and processing design of the injection molding machine as well. The number of cavities was designed based on the requirement of rubber product quality, projected area, dimensional accuracy, production yield, injection volume, clamping force, mold dimensions and effective mounting area. The cavities were arranged in equal distance. The number of mold joints should be as less as possible and it was better to place the joints away from the working surface of the final product. The center line of main feed coincided with the center line of injection nozzle. Circular shaped feed cross-section was preferred. In addition, it was recommended to minimize the feed length and put the feed gate to the position where the product had the largest thickness.