The J458 800Kg low pressure casting machine for wheel hubs is a universal equipment for aluminum alloy low pressure casting, mainly used for the production of castings such as automotive aluminum alloy wheels. & nbsp; The machine is composed of a main machine (including a clamping mechanism, a static mold four core pulling mechanism, an ejection mechanism, a frame, a safety limit mechanism, and a piece taking mechanism), a hydraulic system, a molten pool type insulation furnace and a transmission car, a liquid level pressurization device, an electrical control system, and a mold cooling system.Performance characteristics: The clamping mechanism is guided by four pillars and adopts a fast and slow clamping method to improve work efficiency and reduce impact on the mold. The static template is rigidly connected to the rack;A safety limit device driven by a cylinder is installed on the upper part of the combined cylinder seat, which can prevent the sliding of the moving template within the travel range of the moving template;Four static mold core pulling mechanisms are installed on the static template and driven by four oil cylinders to achieve vertical parting on the four sides of the mold. The center height of the core pulling cylinder can be adjusted up and down within a certain range; A separate ejection mechanism with high ejection force and the ability to eject castings from any position; The robotic arm for picking up parts adopts a hydraulic motor driven swing arm to rotate the parts, and the connecting plate floats to reduce collision with the casting; The machine can be equipped with multiple air-cooled, water-cooled, and water-air mixed cooling circuits, which can automatically control cooling in a time manner;Adopting a molten pool type insulation furnace. Radiation heating, PID control, rated temperature range: 680-750 ℃; Temperature control accuracy:± 5℃；The insulation furnace is fixed on the transmission trolley, and the lifting mechanism is used to lift the furnace body. The hydraulic motor is used to drive the trolley to move smoothly before and after;The electrical control system adopts a monitoring method of upper and lower computers. Using an imported PLC as the lower control machine, complete the sequential operation of the main machine, liquid level pressurization, and mold cooling control of the low-pressure casting machine. Using an imported human-machine interface or industrial control computer as the upper computer, complete the setting and modification of process parameters for low-pressure casting machines, monitor and display pressure data and curves, as well as machine working status and fault alarm information. The monitoring method of the upper and lower computers ensures that even in the event of a malfunction in the upper computer, the lower control system can still automatically operate according to the preset process parameters, thereby further improving system stability;The liquid level pressurization device adopts an imported proportional valve and high-precision pressure sensor to achieve pressure detection and real-time closed-loop feedback control in the insulation furnace, with PID adjustment method. It has functions such as multi-level linear pressurization, automatic tracking and setting of pressurization curve, insulation furnace leakage compensation, and liquid level compensation. High pressure control accuracy and good repeatability ensure the stability and consistency of the low-pressure pouring process, effectively improving the yield of castings.Main technical parameters Parameter NameParameter valueCompanyHolding Furnace Capacity (AL)eight hundredKgStatic template size2460X1530mmMoving template size1000X1000mmDistance between guide bars1400x1070mmMoving template travelone thousand and ninetymmEjection strokeone hundredmmOpening forcetwo hundred and tenKNCombining forceone hundred and fiftyKNEjection forcetwo hundred and twentyKNMinimum opening gearfive hundredmmMaximum opening gearone thousand five hundred and ninetymmCore pulling forcesixtyKNCore pulling cylinder stroketwo hundred and fiftymmOil pump motor powereighteen point fiveKW
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