供氧面罩主体橡胶模设计

Design of Rubber Mold for Oxygen Supply Mask

面罩主体是供氧面罩中一个十分重要的橡胶件,其形状曲折复杂,厚度变化大,最薄处仅为0.7mm,面罩主体裙围需与人的脸部造型完全吻合。通过对面罩主体的形体分析,在裙边与裙围转接处存在着弓形高"障碍体",橡胶模便采用了二次分型的方法,使得凸模与凹模及凸模与中模都能够分型,成型面罩主体型腔的中模,是一个大的凸台"障碍体"。面罩主体的脱模,是利用了硅橡胶面罩主体的弹性,采用了手工剥离或吹入压缩空气使其膨胀脱模的形式。在距凹模模腔0.2mm的沿周,制有1.5mm×90°的余胶槽,余胶进入余胶槽中形成飞边,凹槽边缘与型腔边缘所形成的0.20mm刃口,当面罩主体压制后脱模时,飞边能自动被刃口切落。模具结构的形式,实现了面罩主体顺利成型和脱模及飞边的处理。

The mask body is the oxygen mask in a very important rubber parts, complicated shape and high thickness variation, the thinnest at only 0.7 mm. The main body of the mask must be in full agreement with the human face. Based on analysis of the main body cover, the skirt and skirt adapter there arc high barrier＂. The rubber mold is divided into two sub models, which can be divided into the convex mold and the concave mold and the punch and the mold. The middle mode of the main cavity of the molding face mask is a big obstacle＂. The mask body demoulding is using the elastic silicon rubber mask body, using the manual peeling or blowing compressed air to the expansion release molding. From the concave mold cavity 0.2 mm along the peripheral system is more than 1.5 mm glue tank × 90 degrees, more than rubber gel into the groove to form flash. The edge of the groove and the edge of the shape of the edge of the 0.20mm blade, when the main body of the mask to press release, the flying edge can be automatically cut off the edge of the blade. Mold structure of the form, the main body of the mask was successfully formed and the release of the mold and the processing of the flying edge.