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The role of the 5 main parts of the injection molding machine

TIME:2021-04-25 Share

The role of the 5 main parts of the injection molding machine:

1. Injection system:
The function of the injection system: The injection system is one of the most important components of the Ningbo injection molding machine. Generally, there are three main forms: plunger type, screw type, and screw pre-plasticized plunger injection type. At present, the most widely used is the screw type.

The function of the injection system is that in a cycle of the injection molding machine, a certain amount of plastic can be heated and plasticized within a specified time, and the molten plastic can be injected into the mold cavity through a screw under a certain pressure and speed. After the injection, the molten material injected into the mold cavity is kept in shape.

The composition of the injection system: the injection system is composed of a plasticizing device and a power transmission device. The plasticizing device of the screw injection molding machine is mainly composed of a feeding device, a barrel, a screw, and a nozzle. The power transmission device includes an injection cylinder, an injection seat moving cylinder, and a screw drive device (melting motor).

injection molding machine
2. Hydraulic system:
The function of the hydraulic transmission system is to realize the injection molding machine to provide power according to the various actions required by the process, and to meet the requirements of the pressure, speed, temperature, etc. required by each part of the injection molding machine.

It is mainly composed of various hydraulic components and hydraulic auxiliary components, among which the oil pump and the motor are the power sources of the injection molding machine. Various valves control the oil pressure and flow rate to meet the requirements of the injection molding process.

3. Mold clamping system:
The role of the clamping system: the role of the clamping system is to ensure that the mold is closed, opened and ejected products. At the same time, after the mold is closed, sufficient clamping force is provided to the mold to resist the cavity pressure generated by the molten plastic entering the mold cavity, and to prevent the mold from opening seams, resulting in a bad product status.

The composition of the mold clamping system: the mold clamping system is mainly composed of a mold clamping device, 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.

4. Electrical control system:
The electrical control system and hydraulic system are reasonably coordinated to realize the process requirements (pressure, temperature, speed, time) and various program actions of the injection machine. It is mainly composed of electrical appliances, electronic components, meters, heaters, sensors, etc. There are generally four control modes, manual, semi-automatic, fully automatic, and adjustment.

5. Heating/cooling system edit this paragraph:
The heating system is used to heat the barrel and the injection nozzle. The barrel of the injection molding machine generally uses an electric heating ring as a heating device, which is installed on the outside of the barrel and is detected in sections by a thermocouple.

The heat conducts heat conduction through the cylinder wall to provide a heat source for the plasticization of the material; the cooling system is mainly used to cool the oil temperature, too high oil temperature will cause a variety of faults, so the oil temperature must be controlled. The other location that needs to be cooled is near the discharge port of the feed pipe to prevent the raw material from melting at the discharge port, causing the raw material to fail to feed normally.

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