Injection Machine is also known as injection molding machine or injection mold machine. It is the main molding equipment for making thermoplastic or thermosetting plastics into various shapes of plastic products using plastic molding molds. Divided into vertical, horizontal, and all-electric. The injection molding machine can heat the plastic and apply high pressure to the molten plastic so that it can be injected and fill the mold cavity.
Injection molding machine is usually composed of injection system, mold clamping system, hydraulic transmission system, electrical control system, lubrication system, heating and cooling system, safety monitoring system, etc.
1. Injection System
The role of the injection system: The injection system is one of the most important components of the injection molding machine. There are generally three main types of plunger, screw and screw pre-plastic plunger injection. The most widely used is the screw type. Its function is that in a cycle of the plastic injection machine, after a certain amount of plastic is heated and plasticized within a specified time, under a certain pressure and speed, the molten plastic is injected into the mold cavity through the screw. After the injection is completed, the molten material injected into the mold cavity is kept shaped.
The composition of the injection system: The injection system consists 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, a glue passing component and a nozzle part. The power transmission device includes an injection oil cylinder, an injection seat moving oil cylinder and a screw drive device (melt glue motor).
2. Mold clamping system
The function of the mold clamping system: The function of the mold clamping system is to ensure that the mold is closed, opened and the product is 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 mold cavity to prevent the mold from opening, which causes the undesirable status of the product.
Composition of the mold clamping system: The mold clamping system is mainly composed of a mold clamping device, a machine twist, a mold adjustment mechanism, an ejection mechanism, front and rear fixed templates, a movable template, a mold clamping cylinder and a safety protection mechanism.