Movable pressure-casting local pressurizing device with feedback mechanism

Abstract

The invention discloses a movable pressure-casting local pressurizing device with a feedback mechanism. The device comprises an electrical control system (1) and a hydraulic control system (2). The electrical control system (1) comprises a PLC control module. The hydraulic control system (2) comprises a hydraulic oil tank (202), multiple electric proportional pressure reducing valves (205), multiple electric proportional direction flow control valves (207), a hydraulic pump (201) and multiple sensors. The sensors, the electric proportional pressure reducing valves (205) and the electric proportional direction flow control valves (207) are all connected with the PLC control module. One end of the hydraulic pump is arranged in the hydraulic box (202), the other end of the hydraulic pump is connected with a pressurizing shaft, hydraulic direction-changing valves (209) are arranged in oil path inlets of the pressurizing shaft, and the electric proportional pressure reducing valves (205) and the electric proportional direction flow control valves (207) are arranged between two ports of the hydraulic direction-changing valves (209). The movable pressure-casting local pressurizing devicewith the feedback mechanism can adjust the pressurizing pressure and speed, and shrinkage cavities are avoided.

Description

technical field [0001] The invention belongs to the technical field of die-casting, and more specifically relates to a mobile die-casting local pressure device with a feedback mechanism. Background technique [0002] Die casting, as an excellent nearly no-reserve liquid metal forming method, is widely used in the production of light metal alloy parts such as aluminum and magnesium. It is mainly composed of a moving mold, a fixed mold, an injection chamber, an injection piston and a cavity. , wherein the movable mold and the fixed mold form a cavity, the injection chamber is connected to the cavity, and the injection piston is arranged in the injection chamber. [0003] In recent years, the requirements of lightweight, high integration and high performance have made the structure and shape of castings more and more complex, and the quality requirements have become higher and higher. Leak testing under high pressure. However, when die-casting parts with very large wall thick...

AI Technical Summary

Problems solved by technology

[0004] However, in the traditional partial pressurization process, if the timing is too early, the pressurization is over before the molten aluminum solidifies, and the pressurizing pin acts as a fixing rod; if the timing is too slow, the molten aluminum solidifies, and the pressurizing pin It cannot be advanced; but in the traditional partial pressure die-casting method, the speed of pressure cannot be adjusted, and the pressure is too fast or too slow to eliminate the shrinkage cavity

At the same time, the traditional local pressurization device cannot detect the pressurization stroke, and defective products will flow out due to insufficient pressurization.

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