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注射缸是塑料注射成型机注射系统的主要部件,它主要有以下两个功能: 注射:注射活塞在液压推动下,直线运行,通过螺杆将料筒内螺杆头前腔熔融的塑料注射到模腔中去。预塑:注射完成后,经过保压,液压马达(或电动机)驱动传动轴带动螺杆旋转,使注射活塞在料筒内塑料熔融挤压力的推动下往后退(即预塑),为下一次注射作准备。过去,液压缸直线运动与液压马达的回转运动是采用分离结构,如图1所示。近几年,采用旋转活塞式注射液压缸,如图2,将注射的直线运动和预塑的回转运动合成一体。注射时,
The injection cylinder is the main part of the injection system of the plastic injection molding machine. It mainly has the following two functions: Injection: The injection piston runs linearly under the hydraulic pressure and injects the plastic melted by the front cavity of the screw head in the barrel into the cavity Go in. Pre-plastic: After the injection is completed, the pressure is applied to the hydraulic motor (or motor) to drive the drive shaft to drive the screw to rotate so that the injection piston will move backward (ie pre-molding) under the plastic melt extrusion pressure in the cylinder, Preparation for injection. In the past, the hydraulic cylinder linear motion and hydraulic motor rotary motion is the use of separate structures, shown in Figure 1. In recent years, the use of rotary piston injection cylinder, shown in Figure 2, the injection of linear motion and pre-plastic rotary motion synthesis. When injected,