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How does zipper machinery work?

by：ZYZM 2022-01-24

Automatic zipper machine is usually composed of injection system, mold clamping system, hydraulic transmission system, electrical control system, belt feeding auxiliary system, heating and cooling system, safety monitoring system, etc.

The working principle of the zipper machine is similar to that of a syringe for injection. It uses the thrust of the screw (or plunger) to make the plasticized molten state (that is, the viscous flow state). The process in which plastic is injected into the closed mold cavity, and the product is obtained after the curing and shaping process inside the zipper machine.

The working principle of injection molding of zipper machinery is a cycle process, each cycle mainly includes: quantitative feeding - melt plasticization - pressure injection - mold filling and cooling - mold opening and pulling. After the plastic part is pulled out, the mold is closed again for the next cycle.

The operation items of zipper machinery 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, adjustment of injection pressure and back pressure, etc. are carried out respectively.

The molding process of the general screw zipper machine is as follows: first, the granular or powdery plastic is added into the barrel, and the plastic is melted by the rotation of the screw and the heating of the outer wall of the barrel.

Then the zipper machine closes the mold and moves the injection seat forward, so that the nozzle is close to the gate of the mold, and then pressurized oil is introduced into the injection cylinder to advance the screw, so that the high pressure and faster The speed injects the melt into a closed mold at a lower temperature.

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