The working principle of injection molding machine
The working principle of injection molding machine and injection syringe with similar, it is the use of screw (or piston) thrust, the plasticizing good molten state (i.e. viscous flow) plastic injected into the mold cavity closed good after curing stereotypesmade the process of the products.Injection molding is a cycle process, each cycle mainly include: quantitative feeding - melt plasticization - pressure, injection - filling mold cooling - die opening pieces. Take out the plastic parts and then close the die for the next cycle.Injection molding machine operation items: injection molding machine operation items, including control keyboard operation, electrical control system operation and hydraulic system operation three aspects. The injection process, feeding action, injection pressure, injection speed, ejection type, temperature monitoring, injection pressure and back pressure adjustment are carried out respectively.The molding process of the general screw injection machine is first granular or powdered plastic into the machine barrel and then through the rotation of the screw and barrel wall heating the plastic as molten state, then the machine mold and the injection seat moves forward, to close the mold gate nozzle, the pressure oil through to the injection cylinder then, the screw to move forward at a high pressure and speed will melt into the closed mold temperature low, after a certain period of time and pressure (also called pressure), cooling, the curing, can remove mold products (pressure to prevent molten material the reflux, supplementary materials, to ensure the products with the mold cavity and the density and size tolerance in a certain cavity).
