What are the main parts of an injection molding machine?
(1) the function of injection system in injection molding system: injection system is one of the most important parts of injection molding machine. There are 3 main forms, plunger type, screw type, screw type, pre plastic plunger and injection type. Screw type is the most widely used at present. It is, in a circular plastic injection machine, within a specified time will be a certain number of plastic heating plasticization, pressure and velocity in the screw, through the molten plastic is injected into the mold cavity. At the end of the injection, the melt is injected into the mold cavity to retain the shape. Injection system: injection system consists of plasticizing device and power transmission device. The plasticizing device of screw type injection molding machine is mainly composed of feeding device, material barrel, screw rod and nozzle. The power transmission device includes an injection cylinder, an injection seat, a moving cylinder, and a screw drive device (a melt motor). (2) the function of the die closing system: the function of the die closing system is to ensure the die closing, opening and ejection. At the same time, in the mold closed, to give the mold enough clamping force, in order to resist the molten plastic into the mold cavity cavity pressure, to prevent the mold slit, resulting in the bad situation of the product. The die making system consists of a die clamping device, a die adjusting mechanism, an ejector mechanism, a front and rear clamping plate, a moving die plate, a die cylinder and a safety protection mechanism.
(3) hydraulic system hydraulic transmission system is to realize the injection molding machine according to the process of the various actions required to provide power, and meet the injection molding machine parts of the pressure, speed, temperature and so on. It is mainly composed of each kind of hydraulic component and hydraulic auxiliary component, in which the oil pump and the electric motor are the power source of the injection molding machine. Various valves control the oil pressure and flow rate to meet the requirements of the injection molding process. (4) the electrical control system, the electrical control system and the hydraulic system coordinate reasonably, may realize the injection molding machine craft process request (pressure, temperature, speed, time) and each kind of procedure movement. Mainly by electrical appliances, electronic components, instruments, heaters, sensors and other components. Generally there are four kinds of control, manual, semi-automatic, automatic adjustment.
(5) the heating system of heating / cooling system is used for heating the barrel and injection nozzle. The injection molding machine usually adopts the electric heating coil as the heating device and is installed outside the material barrel and is examined by thermocouple. Heat through the cylinder wall heat conduction for material plasticization provides heat source; cooling system is mainly used to cool the oil temperature, oil temperature is too high will cause a variety of faults, so the oil temperature must be controlled. Another place that needs to be cooled is near the end of the material pipe to prevent the material from melting at the bottom of the material, resulting in raw material being not normally laid. (6) lubrication system lubrication system is a dynamic template, a mould adjusting device and a connecting rod hinge at the injection molding machine relative motion spot to provide lubrication loop, in order to reduce energy consumption and improve the service life of the parts, lubrication can be manual lubrication regularly, can also be automatic electric lubricating; (7) safety device safety protection and monitoring system of injection molding machine is mainly used for safety protection device, machine. The utility model is mainly composed of a safety door, a hydraulic valve, a limit switch, a photoelectric detecting element, etc., and realizes the interlocking protection of the electric machinery and the hydraulic pressure. The monitoring system mainly monitors the oil temperature, the temperature, the system overload and the process and equipment faults of the injection molding machine, and finds the abnormal situation to indicate or alarm.
