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Analysis of the seven major systems of plastic machinery injection molding machine

Update:18-01-2020
Summary:

Injection system The role of the injection system: The […]

Injection system The role of the injection system: The injection system is one of the most important components of the injection molding machine. Generally, there are three main types of plunger, screw, and screw pre-plastic plunger injection. At present, the most widely used is the screw type. Its function is that in a cycle of a plastic injection machine, a certain amount of plastic can be heated and plasticized within a specified time, and the molten plastic is injected into the mold cavity through a screw under a certain pressure and speed. After the injection is completed, the molten material injected into the mold cavity is maintained in shape. Composition of the injection system: The injection system consists of a plasticizing device and a power transmission device. The plasticizing device of the screw-type injection molding machine is mainly composed of a feeding device, a barrel, a screw, a rubberized component and a nozzle. The power transmission device includes an injection oil cylinder, an injection seat moving oil cylinder, and a screw driving device (melt motor).

The role of the clamping system: The function of the clamping system is to ensure that the mold is closed, opened and ejected. At the same time, after the mold is closed, the mold is provided with sufficient clamping force to resist the cavity pressure generated by the molten plastic entering the mold cavity, to prevent the mold from cracking, which causes the defective status of the product. The composition of the mold clamping system: The mold clamping system is mainly composed of a mold clamping device, a machine winch, a mold adjustment mechanism, an ejection mechanism, a front and rear fixed template, a movable template, a mold clamping cylinder and a safety protection mechanism.

Hydraulic system The function of the hydraulic transmission system is to realize that the injection molding machine provides power according to the various actions required by the process, and to meet the requirements of the pressure, speed, temperature and other parts of the injection molding machine. It is mainly composed of various kinds of hydraulic components and hydraulic auxiliary components, of which the oil pump and the motor are the power source of the injection molding machine. Various valves control oil pressure and flow to meet the requirements of the injection molding process.

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