Generally, the control board of injection molding machine has a fast slow knob to meet the requirements of injection speed. 

A large flow oil pump and a small flow pump are set in the hydraulic system to supply oil at the same time. When the oil circuit is connected with large flow, the injection molding machine realizes rapid mold opening and closing and rapid injection.

When the hydraulic oil circuit only provides small flow, various actions of the injection molding machine will be carried out slowly. 

3、 Selection of ejection forms: injection molding ejection forms include mechanical ejection and hydraulic ejection, some are also equipped with pneumatic ejection system, and the ejection times are single and multiple. The ejection action can be manual or automatic. 

The ejection action is started by the mold opening stop limit switch. Workers can adjust the ejection time button on the control cabinet as needed. The ejection speed and pressure can also be controlled by the switch on the control cabinet. The front and rear distance of the ejector pin movement is determined by the travel switch