The injection pressure and position are the key parameters that affect the injection speed and amount. Generally:

1. The higher the injection pressure is, the faster the injection speed is

2. The injection position is mainly used to control the injection amount of each injection stage, for example: from the beginning of injection a to the material flow to gate position B, it is generally a fast filling. To prevent the injection mark and stress through gate, low speed is adopted. At this time, a conversion position B is needed. The injection pressure is large in the travel from a to B, and the injection pressure is small after passing through B.

Function of the injection system: the injection system is one of the most important parts of the injection molding machine, generally including plunger type, screw type and screw pre plastic plunger injection type

3. Main forms. The most widely used is screw type. Its function is to heat and plasticize a certain amount of plastic in a specified time in a cycle of injection molding machine, and then inject the molten plastic into the mold cavity through the screw under a certain pressure and speed. At the end of the injection, the molten material injected into the mold cavity remains set.

Extended data: the working principle of the injection molding machine is similar to the syringe used for injection. It uses the thrust of the screw (or plunger) to melt the plasticized state