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动密封用O形圈压缩量比较小,如果分型面在工作面上,由于有硫化飞边,或者修边时造成伤痕,就容易引起泄漏。所以分型面必须躲开工作面,而加工成45°分型。45°分型O形圈硫化模具,按其规格大小和用户的要求分为9腔,4腔和单腔几种。下面介绍型腔部位各部尺寸的计算及制造工艺。首先必须要说明两点:①O形圈的收缩率,与胶号和规格有密切关系,不能笼统规定一个固定的常数,根据不同情况进行测定,②余胶胶
Seal with O-ring compression is relatively small, if the parting surface on the work surface, due to sulfide flash, or trimming caused by scars, it is easy to cause leakage. Therefore, the sub-surface must avoid the face, and processed into 45 ° sub-type. 45 ° O-ring type curing sub-model, according to their size and user requirements are divided into 9-cavity, 4-cavity and single-cavity several. The following sections describe the calculation of cavity size and manufacturing process. First of all, we must explain two points: ① O-ring shrinkage rate, and glue numbers and specifications are closely related, not a general requirement for a fixed constant, measured according to different circumstances, ② Yu glue