Ultra-low speed aluminum alloy die-casting system

Abstract

The invention provides an ultra-low speed aluminum alloy die-casting system. The system comprises an aluminum alloy die casting machine and a heat preserving furnace, wherein the heat preserving furnace is provided with a quantitative pouring pump, wherein the quantitative pouring pump is connected with a liquid conveying pipeline; the outlet end of the liquid conveying pipeline is provided with a liquid conveying groove connected to a funnel on a die-casting chamber channel; a refractory mortar layer is laid on the surface of the liquid conveying groove; a release coating layer is sprayed on the surface of the refractory mortar layer; a release coating layer is uniformly coated on the surface of the funnel; the thickness of the release coating layer is between 3 and 5 millimeters; and an included angle between the liquid conveying groove and an ejection horizontal plane is between 15 and 25 degrees. The invention also provides an alloy melt temperature control range and an operation specification for the heat preserving furnace of the system. Through system setting, molten metal flows through a chute and the funnel before casting; and due to the adoption of small-angle ultra-low speed die casting and shaping, the molten metal flows stably without eddy current or splashing, gas inclusion in a shaping process is decreased, the surface of a casting molded by die casting is flat and smooth, crystal particles are fine and air holes inside a product have a small number of defects.

Description

technical field [0001] The invention belongs to the technical field of metallurgical casting. The invention relates to an aluminum alloy ultra-low-speed die-casting technology, in particular to an aluminum alloy ultra-low-speed die-casting system. Background technique [0002] Aluminum alloy has a series of good material properties, such as small structure density, high specific strength, high specific stiffness, good elasticity, excellent impact resistance, corrosion resistance, good wear resistance, and has good processing and molding characteristics and recycling characteristics, etc. . The main method of aluminum alloy forming is die casting. Compared with other casting processes, the existing die-casting process has the characteristics of high dimensional accuracy and smooth surface. However, when the aluminum alloy is die-casted, the molten metal is filled into the mold cavity at a high speed, and the large cavity in the cavity Part of the gas is often too late to b...

AI Technical Summary

Problems solved by technology

Compared with other casting processes, the existing die-casting process has the characteristics of high dimensional accuracy and smooth surface. However, when the aluminum alloy is die-casted, the molten metal is filled into the mold cavity at a high speed, and the large cavity in the cavity Part of the gas is often too late to be discharged, and is inevitably mixed into the molten metal, and remains in the casting in the form of pores, resulting in the formation of relatively serious pore defects in aluminum alloy die castings, resulting in serious quality problems

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