Injection molding machine introduction

2019-01-22 17:18:28

    Injection molding machines are also known as injection molding machines or injection machines. It is the main molding equipment for thermoplastic or thermosetting plastics using plastic molding dies to make plastic products of various shapes. Divided into vertical, horizontal, all-electric. The injection molding machine heats the plastic and applies a high pressure to the molten plastic to eject it to fill the mold cavity.

    Injection molding machines usually consist of injection system, clamping system, hydraulic transmission system, electrical control system, lubrication system, heating and cooling system, safety monitoring system and so on.

    Injection system

    The role of the injection system: the injection system is one of the most important components of the injection molding machine, generally has a plunger type, screw type, screw pre-plastic plunger injection

    There are 3 main forms of shooting. The most widely used is the screw type. The function is that, in a cycle of the injection molding machine, a certain amount of plastic can be plasticized and plasticized in a predetermined time, and the molten plastic is injected into the mold cavity through the screw at a certain pressure and speed. After the injection is completed, the melt injected into the cavity is kept set.

    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 glue assembly and a nozzle portion. The power transmission device includes an injection cylinder, an injection base moving cylinder, and a screw drive device (melt motor).

    Clamping system

    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 supplied with sufficient clamping force to resist the cavity pressure generated by the molten plastic entering the cavity, preventing the die from being slit, resulting in a bad condition of the product.

The composition of the clamping system: the clamping system is mainly composed of a clamping device, a machine clamping, a mold adjustment mechanism, an ejection mechanism, a front and rear fixed template, a moving template, a clamping cylinder and a safety protection mechanism.

    Hydraulic system

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

    Electrical control

    The electrical control system and the hydraulic system are properly coordinated to achieve the process requirements (pressure, temperature, speed, time) of the injection machine and various program actions. Mainly composed of electrical appliances, electronic components, meters (see the bottom right), heaters, sensors and so on. There are generally four control modes, manual, semi-automatic, fully automatic, and adjustment.