Principle of injection molding machine Injection molding machine is a special plastic molding machine. It uses plastic thermoplasticity, after heating and melting, with high pressure to make it flow into the mold cavity quickly, and after a period of pressure keeping and cooling, it becomes a plastic product of various shapes. 1, the working cycle of the injection molding machine 1) locking die: the die pull is fast approaching the fixed die wrench (including slow fast slow speed), and it is confirmed that the system is turned to high pressure when there is no foreign matter, and the mould is locked to keep the pressure inside the cylinder. 2) the shooting platform moves forward: the ejector is forward to the specified position (the nozzle and the die are tightly attached). 3) injection molding: the screw can be set to multistage speed, pressure and stroke, and the material in the front of the barrel can be injected into the cavity. 4) cooling and pressing: according to setting a variety of pressure and time, keep the pressure of the barrel, and the mold cavity cooling and molding. 5) and pre cooling: plastic mold cavity products continue to cool, while the hydraulic motor driven screw rotation of the plastic particles before the push screw back in the backpressure control set, when the screw back to a predetermined position, the screw stops rotating, loosening the injection cylinder according to the set, is expected to end. 6) the ejection stage backwards: after the preplastic end, the ejection platform retreats to the specified position. 7) open die: die back to the place (including slow - Fast - slow) 8) top out: top needle to top out products. 2, the electric energy consumption of the injection molding machine The electrical energy consumption of the injection molding machine is mainly shown in the following parts: The hydraulic system of pump power consumption, the power consumption of the heater of the circulating cooling water pump power consumption (in the injection molding workshop, injection molding machine generally share a cooling water pump), the hydraulic pump motor power consumption accounted for the entire injection molding machine electricity more than 80%, so the power consumption is reduced key energy-saving injection molding machine.