等壁厚螺杆泵定子橡胶成型工艺研究

摘要

橡胶属于高黏性流体，其流动性差，加工零件在浇注加压时因异型及空间狭长等因素，很可能会导致浇注压力过大，造成加工过程中的失效。等壁厚螺杆泵定子注胶成型就是一种典型的高黏性流体在狭长空间内的成型过程。由于本身结构细长，且同普通的螺杆泵定子相比，截面空间更小，易导致成型过程中的失效。以等壁厚螺杆泵定子制造工艺为研究对象，开展了深入的研究，形成了一套橡胶在狭长空间内浇注成型的工艺方法。通过改善橡胶性能、控制浇注温度、调整浇注压力等措施，既保证了橡胶在狭长异型内腔顺利浇注成型，又缩短了胶注时间，提高了工作效率。%The rubber is a kind of liquid which is high viscosity and low fluidity.When the product is injected molding,special shaped and narrow section and other factors are likely to lead to exces-sive molding pressure caused by the failure of the process.The process that uniform thickness PC pump stator is injected is a typical high viscosity fluid in long and narrow section.Because of slen-der structure,comparing with ordinary PC pump stator,the section of uniform thickness PC pump stator is narrower.It easily leads to the failure of the forming process.To deeply studying in uni-form thickness PC pump stator manufacturing process,finally,form a set of technology program about the rubber injection molding in a long and narrow section.By improving the rubber proper-ties,controlling the injection temperature,and adjusting the injection pressure,not only ensure the rubber molding successfully,but also shorten the injection time and improve the work efficiency.