First, zipper machine working principle:
Injection molding is a cyclic process, and each cycle mainly includes: quantitative feeding - melting plasticization - pressure injection - mold filling cooling - mold opening and drawing. After pulling out the plastic part, the mold is closed again and the next cycle is carried out.
Second, zipper machine operation items:
The operation items of the zipper machine include three aspects: 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, monitoring of the temperature of each section of the cylinder, adjustment of injection pressure and back pressure, etc.
Third, the general molding process of screw zipper machine is:
First of all, granular or powdered plastic is added into the barrel, and the plastic becomes molten by rotating the screw and heating the outer wall of the barrel. Then the machine moves the mold closing and injection seat forward, so that the nozzle is tight to the gate of the mold, and then the injection cylinder is fed with pressure oil, so that the screw is pushed forward, so that the molten material is injected into the closed mold with a low temperature at a high pressure and a fast speed. After a certain amount of time and pressure holding (also known as pressure holding), cooling, so that it solidifies and forms, the mold can be opened to remove the product (the purpose of pressure holding is to prevent the reflux of the molten material in the mold cavity, to supplement the material in the mold cavity, and to ensure that the product has a certain density and dimensional tolerance). The basic requirements of injection molding are plasticizing, injection and molding. Plasticization is the prerequisite to achieve and ensure the quality of molded products, and in order to meet the requirements of molding, t
