Low-pressure casting device for aluminum alloy wheels of automobile

Abstract

A low-pressure casting device for aluminum alloy wheels of an automobile is composed of a low-pressure casting system control cabinet, a pressurization air inlet tube, a pressure relief air outlet tube, a molten aluminum heat preservation furnace, an iron sprue, a ceramic heat preservation cup, a molten aluminum lifting tube, a heat insulation layer, twelve to sixteen buffer holes and a ceramic filter net. The two ends of the pressurization air inlet tube and the two ends of the pressure relief air outlet tube are connected with the low-pressure casting system control cabinet and the molten aluminum heat preservation furnace. A pressure control valve is installed in the low-pressure casting system control cabinet and arranged at the end of the pressure relief air outlet tube. A pressure relief zero return button and a cumulative number zero clearing button are arranged in the low-pressure casting system control cabinet. The iron sprue is assembled at a die feed inlet, the ceramic heat preservation cup is assembled under the iron sprue, the molten aluminum lifting tube is assembled in the molten aluminum heat preservation furnace, the upper end of the molten aluminum lifting tube is provided with the heat insulation layer, the inner diameter of the part, immerged in molten aluminum, of the lower end of the molten aluminum lifting tube is greater than that of the upper end, the buffer holes with the diameter of 10-12mm are formed in the lower end of the molten aluminum lifting tube, and the included angle formed between each buffer hole and the vertical plane ranges from 15 degrees to 20 degrees. The low-pressure casting device for the aluminum alloy wheels of the automobile can remarkably reduce the burning loss, the heat loss, needle holes and slag holes.

Description

technical field [0001] The invention relates to the field of low-pressure casting of aluminum alloy wheels for automobiles, in particular to a low-pressure casting device for aluminum alloy wheels of automobiles. Background technique [0002] Low-pressure casting is currently the most commonly used casting method for automotive aluminum alloy wheels. With the rapid development of the global automobile market, as one of the key components of the automobile drive system, consumers have higher and higher requirements for automobile aluminum alloy wheels. The wheels must not only have reliable safety features, but also have a stylish and beautiful appearance. Therefore, the requirements for the control of slag holes and pinholes in the casting process are also higher. However, the current low-pressure casting process and devices are difficult to further control the slag holes and pinholes. At present, it usually takes 2.5 to 3.5 hours from the time when the molten aluminum is ...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the patent of the present invention is to overcome the large burning loss, high energy consumption, many pinholes caused by the existing low-pressure casting method for aluminum alloy wheels, and the backflow of molten aluminum at the bottom of the holding furnace during the filling process, which causes many slag holes in castings caused by the backflow of tumbling slag inclusions etc., providing means to reduce burnout and energy usage and effectively control pinholes and slag holes

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