自从三年前带齿轮泵的挤出机出现后,使塑料制品的产量增加,产品厚度容易控制(如电线被覆塑料)能用于对温度敏感的塑料等。因此现在已经成了热门的挤出工艺。各工厂、研究单位纷纷进行开发与研究。近年来取得了新的进展,现报导如下:(关于带齿轮泵的挤出机,本刊于1983年第8期,“塑料挤出机新的改进”一文,已有报导。) Since the advent of extruders with gear pumps three years ago, increased production of plastic products, easy control of product thickness (eg, wire coated plastic) can be used for temperature-sensitive plastics and the like. So now it has become a popular extrusion process. The factories, research institutes have carried out development and research. New progress has been made in recent years, as follows: (Report on Extruders with Gear Pumps, Issue 8, 1983, “New Improvements in Plastic Extruders”, has been reported.)