二、注入：
2、 Injection:
注入是指注入螺杆以一定的压力和速度将料筒前端的熔料经喷嘴注入模腔，分慢速注入和速度注入两种。
Injection refers to that the injection screw injects the molten material at the front end of the barrel into the mold cavity through the nozzle at a certain pressure and speed, which can be divided into slow injection and speed injection.
(1)慢速注入(2Y、5Y1、7Y1、8Y通电)。泵2的压力油经电液换向阀15左位和单向节流阀14进入注入缸右腔，左腔油液经电液换向阀11中位回油箱，注入缸活塞带动注入螺杆慢速注入，注入速度由单向节流阀14调节，远程调压阀20起定压作用。
(1) Slow injection (2Y, 5y1, 7y1, 8y power on). The pressure oil of pump 2 enters the right cavity of injection cylinder through the left position of Electro-hydraulic Directional Valve 15 and one-way throttle valve 14. The oil in left chamber returns to the oil tank through the middle position of electro-hydraulic directional valve 11. The piston of injection cylinder drives the injection screw to inject slowly. The injection speed is regulated by one-way throttle valve 14, and the remote pressure regulating valve 20 is used for constant pressure.
(2)速度注入(1Y、2Y、5Y1、6Y0、7Y1、8Y通电)。泵1和泵2的压力油经电液换向阀11右位进入注入缸右腔，左腔油液经换向阀11回油箱。由于一次性餐具设备中的两个泵同时供油，且不经过单向节流阀14，因此注入速度加快了，此时，远程调压阀20起安全作用。
(2) Velocity injection (1y, 2Y, 5y1, 6y0, 7y1, 8y are powered on). The pressure oil of pump 1 and pump 2 enters the right cavity of injection cylinder through the right position of electro-hydraulic directional valve 11, and the oil in left chamber returns to the oil tank through directional valve 11. Since the two pumps in the disposable tableware equipment supply oil at the same time and do not pass through the one-way throttle valve 14, the injection speed is accelerated. At this time, the remote pressure regulating valve 20 plays a safety role.