Vertical Injection Molding Machine Structure Function

After the injection is completed, the molten material injected into the mold cavity is kept in shape. Composition of the injection system: The injection system consists of a plasticizing device and a power transmission device. The plasticizing device of a 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 (melt motor).
(1) Injection system The function of the injection system: The injection system is one of the most important components of an injection molding machine. Generally, there are three main types: plunger type, screw type, and screw pre-plasticizing plunger injection type. The most widely used is the screw type. Its function is to heat and plasticize a certain amount of plastic within a specified time in one cycle of the injection molding machine, and then inject the molten plastic into the mold cavity through the screw at a certain pressure and speed.
(2) Clamping system The function of the clamping system: The function of the clamping system is to ensure the closing, opening, and ejection of the mold. 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, prevent the mold from opening, and cause the product to be in a bad state. 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, front and rear fixed templates, a mobile template, a mold clamping cylinder and a safety protection mechanism.
(3) Hydraulic system The function of the hydraulic transmission system is to provide power for the various actions required by the injection molding machine according to the process, and to meet the pressure, speed, temperature and other requirements of 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 source of the injection molding machine. Various valves control the oil pressure and flow to meet the various requirements of the injection molding process.
(4) Electrical control system The electrical control system and the hydraulic system cooperate reasonably to realize the process requirements (pressure, temperature, speed, time) and various program actions of the injection molding machine. It is mainly composed of electrical appliances, electronic components, instruments, heaters, sensors, etc. There are generally four control methods: manual, semi-automatic, fully automatic, and adjustment.
(5) Heating/cooling system The heating system is used to heat the barrel and injection nozzle. The barrel of the injection molding machine generally uses an electric heating coil as a heating device, which is installed on the outside of the barrel and detected in sections with a thermocouple. The heat is conducted through the barrel wall to provide a heat source for the plasticization of the material; the cooling system is mainly used to cool the oil temperature. Excessive oil temperature will cause a variety of faults, so the oil temperature must be controlled. Another location that needs cooling is near the discharge port of the material pipe to prevent the raw material from melting at the discharge port, resulting in the failure of the raw material to be discharged normally.
(6) Lubrication system The lubrication system is a circuit that provides lubrication conditions for the relative moving parts of the injection molding machine, such as the moving plate, mold adjustment device, and connecting rod hinge, so as to reduce energy consumption and increase the life of parts. Lubrication can be regular manual lubrication or automatic electric lubrication.