Die-casting device for solving air hole defect of die-casting product and die-casting process thereof

Abstract

The invention relates to a die-casting device for solving the air hole defect of a die-casting product and a die-casting process thereof. The die-casting process for solving the air hole defect of the die-casting product is implemented through the following steps that 1), when molten alloy liquid is poured into a charging barrel, a punch of a plunger rod starts to move forwards and carry out segmented moving at a low speed of 0.15 - 0.3m/s, and the metal liquid in a laminar flow state; 2), when the molten alloy liquid is moved to a mold gate, the punch enters a low-speed and high-speed switch position, wherein the running speed of the punch instantly rises to 3 - 6m/s with 0.03 - 0.05s; 3), after high-speed filling is completed, the running speed of the punch enters a high-speed deceleration state, and the pressurization process is adopted simultaneously, wherein vacuumizing is carried out in the stage 1 and is carried out between 30 - 60mm before the punch seals a material inlet and a pouring port. The die-casting device for solving the air hole defect of the die-casting product and the die-casting process thereof, disclosed by the invention, can perform vacuumizing well, and the long-time smooth operation of the device can be guaranteed.

Description

technical field [0001] The invention relates to a die-casting device and a die-casting process for solving the pore defects of die-casting products in the die-casting production process. Background technique [0002] With the rapid development of the automobile industry, the requirements for porosity of automobile die castings are getting higher and higher. The pores of die casting products still cannot meet the requirements of auto parts. Because the pressure casting process is to make the alloy liquid fill the mold cavity in a short time, the gas in the mold cavity is under the action of high temperature and high speed alloy liquid, the pressure of the gas rises sharply, and the gas cannot be discharged by natural exhaust. From the relationship between pressure and solubility, it can be known that on the gas-liquid interface, when the gas pressure increases, the gas solubility in the liquid increases. As the pressure of the gas decreases, the solubility of the gas in the...

AI Technical Summary

Problems solved by technology

[0004] The existing vacuuming device and method have the defects that the vacuuming is not complete, and the molten liquid is easy to enter the vacuum valve, which will affect the quality of the die-casting product and the normal operation of the equipment, and bring great confusion to the manufacturer. It is necessary to carry out further improvement

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