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 inject the plasticized plastic in the molten state (that is, the viscous fluid state) into the closed mold cavity. The process of obtaining products after curing and shaping. Cola bottles, standard mouth bottles, and wide mouth sports bottle lids are all made by injection molding machines
Injection molding is a cyclic process, each cycle mainly includes: quantitative feeding-melting plasticization-pressure injection-mold filling and cooling-mold opening and taking parts. After taking out the plastic part, the mold is closed again for the next cycle.
Injection molding machine operation items: Injection molding machine operation items include control keyboard operation, electrical control system operation and hydraulic system operation. The selection of injection process action, feeding action, injection pressure, injection speed, ejection type, temperature monitoring of each section of the barrel, and adjustment of injection pressure and back pressure are performed respectively.
There are three main aspects in the evaluation of plastic products. The first is the appearance quality, including completeness, color, gloss, etc.; the second is the accuracy between the size and relative position; the third is the physical properties, chemical properties, and Electrical performance, etc.