Equipment and method capable of achieving vacuum quantitative casting of molten metal

Abstract

The invention discloses equipment capable of achieving vacuum quantitative casting of molten metal. The equipment comprises a mechanical device, a vacuum quantitative casting device, an opening and closing device and a control system; the vacuum quantitative casting comprises a seal container with internal space, a gas filling mechanism, a vacuum mechanism and an exhaust opening; the exhaust opening comprises a liquid draining opening allowing molten metal to be drained, a pipeline allowing gas to pass through is further arranged in the internal space, and passes through the liquid draining opening, the pipeline is provided with a gas exhaust opening allowing gas not in contact with the molten metal to be exhausted, the opening and closing device achieves independent control over the liquid draining opening and the gas exhaust oponeing, that is, the opening and closing device can independently control opening and closing of the liquid draining opening and the gas exhaust opening, it is ensured that during casing of the molten metal, the oxidation and hydrogen absorption of the molten metal can be reduced, gas holes and oxide inclusion of a casting are reduced, and the casting quality is improved.

Description

technical field [0001] The invention relates to a vacuum quantitative pouring method and equipment for metal melts, which are mainly used in die casting, squeeze casting and gravity casting of aluminum alloys and magnesium alloys, and belong to the field of casting equipment. Background technique [0002] Aluminum alloys and magnesium alloys are widely used in aerospace, automobile, construction and other fields due to their high specific strength, light weight and good casting performance, and they are playing an increasingly important role in these fields. With the continuous development and progress of science and technology, higher requirements are constantly put forward for the performance of aluminum alloys and magnesium alloys. [0003] Since the aluminum and magnesium elements in aluminum alloys and magnesium alloys are extremely active elements in chemical properties, they are easily oxidized by reacting with oxygen in the air. Therefore, in the pouring process of ...

AI Technical Summary

Problems solved by technology

There are certain shortcomings in this technology: 1. Although inert gas and airtight container are used in the process of ingesting and transferring the alloy melt to ensure the isolation of the melt from the air, the melt discharged from the airtight container during pouring will be Unavoidable exposure to air, resulting in oxidation of the melt

2. During pouring, if the distance between the sealed container and the pressure chamber or barrel is too far, it will cause the melt to flow out in a turbulent state, which is prone to entrainment; if the distance between the sealed container and the pressure chamber or barrel is too close, the outflow The melt may adhere to the outer wall of the sealed container, causing contamination and loss of the melt

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