Magnesium alloy sand casting stepped slit type pouring system

Abstract

The invention relates to a magnesium alloy sand casting ladder gap gating system, which includes a gate, a sprue, a first runner, a second runner, a third runner and a ladder gap runner. The second runner is located above the first runner and the third runner. The bottom of the gate sprue is connected to one end of the first runner, and the other end of the first runner opens upward and passes through the second runner. The sprue is connected with one end of the second sprue, the other end of the second sprue opens downward and is connected with one end of the third sprue through the third sprue, and the other end of the third sprue is connected with the third sprue. The bottoms of the ladder slot runners are connected; the middle part of the second runner is provided with a filter screen for filtering the magnesium alloy liquid, and the cross-sectional area of ​​the first runner, the second runner or the third runner is respectively larger than that of the runner. The cross-sectional area of ​​the gate sprue, the second sprue or the third sprue. The gating system can make the molten magnesium flow smoothly without eddy current, splash and impact.

Description

technical field [0001] The invention relates to a magnesium alloy pouring system, in particular to a magnesium alloy sand casting ladder gap type pouring system. Background technique [0002] Magnesium alloy is an alloy composed of magnesium and other elements. Its characteristics are: low density, high specific strength, large specific elastic modulus, good heat dissipation, good shock absorption, greater impact load capacity than magnesium alloy, and good corrosion resistance of organic matter and alkali. [0003] The main alloying elements are magnesium, zinc, manganese, cerium, thorium and a small amount of zirconium or cadmium. Mainly used in aviation, aerospace, transportation, chemical industry, rocket and other industrial sectors. It is the lightest metal among practical metals. The specific gravity of magnesium is about 2 / 3 of that of magnesium and 1 / 4 of that of iron. It is the lightest metal among practical metals, high strength and high rigidity. [0004] Mag...

AI Technical Summary

Problems solved by technology

Since the molten metal enters through the runner, the drop of the gap vertical cylinder is large, which is prone to secondary slagging, and the filtering facilities in the gating system cannot completely remove the generated slag, resulting in the formation of a large number of slag inclusion holes on the surface of the casting. If the surface quality is unqualified, it will seriously cause the phenomenon of pressure leakage of castings

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