上海电化厂为了提高硬聚氯乙烯塑料的焊接速度,改变过去手工焊接的落后面貌,一年前曾试制成功了一台塑料焊机,并投入生产使用。热对挤焊是一项新的焊接工艺。它的原理是利用硬聚氯乙烯材料的热塑性,用电热板加热的方法,使其焊面熔融,并以一定的外力使之相互对挤 In order to increase the welding speed of hard PVC plastics, Shanghai Electrochemical Factory changed the backward appearance of manual welding in the past. A plastic welding machine was successfully prototyped and put into production one year ago. Hot extrusion welding is a new welding process. Its principle is to use the thermoplastic properties of rigid polyvinyl chloride materials. The method of heating with electric heating plates melts the soldering surface and makes them face each other with a certain external force.