After the injection, the injection into the cavity of the molten material remain finalize the design. The composition of the injection system: injection system is composed of plasticizing device and power transmission device. Screw injection molding machine plasticizing device is mainly composed of feeding device, material barrel, screw, shoot tip parts. Power transmission device including cylinder injection, injection of oil cylinder and the screw drive (melt motor).
(1) the role of the injection system of injection system: injection system is the most important part of injection molding machine, usually have a plunger type, screw, screw plastic injection plunger type three kind of main form. Is currently the most widely used screw type. Its action is, in a loop of the plastic injection machine, can within the prescribed period of time after a certain number of plastic heating plasticizing, under certain pressure and velocity, through the screw in the molten plastic injection mold cavity.
(2) the effect of clamping system clamping system: the role of the clamping system is closed, open and ejection products moulds. At the same time, the closed in the mold for give mould clamping force, to resist the molten plastic into the cavity, the cavity pressure produced by the prevent slotted mould, products of the bad situation. Composition of clamping system: the clamping system is mainly composed of clamping device, the variable organization, ejection mechanism, before and after the fixed template, template, clamping cylinder and security agencies.
(3) the role of the hydraulic system of hydraulic transmission system is to achieve all the requirements of injection molding machine according to process the action, and meet the injection molding machine parts required for the requirement of pressure, velocity, temperature, etc. It is mainly composed of each kind of hydraulic components and hydraulic auxiliary components, which is a dynamic source of injection molding machine oil pump and motor. All kinds of valve control oil pressure and flow, thus satisfying the requirements injection molding process.
(4) electric control system of electrical control system with reasonable hydraulic system, which can realize the process of injection machine requirements (pressure, temperature, speed, time) and a variety of programs. Is mainly composed of electrical appliances, electronic components, instrumentation, heater, sensor, etc. Generally there are four kinds of control mode, manual, semi-automatic and fully automatic, adjustment.
(5) the heating/cooling system, heating system is used for heating cylinder and injection nozzle, injection molding machine cylinder generally USES electric heating circle as a heating equipment, installation, the outside of the cylinder and thermocouple segment detection. Thermal conductive material plasticizing provide heat source for a heat through the wall; The cooling system is mainly used for cooling oil temperature, oil temperature is too high can cause a variety of failure occurs so that the oil temperature must be controlled. Another need cooling position near the feed opening feed tube, prevent raw material in the mouth melting, lead to the raw material can not be normal.
Lubrication system (6) the lubrication system is a dynamic template for injection molding machine, the place such as mould device, connecting rod machine hinge parts provide lubrication conditions, where there is relative motion circuit, in order to reduce energy consumption and improve life parts, lubrication can be regular manual lubrication, can also be automatically electric lubrication.
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