Semi-slit type gating system for use in aluminium alloy sand mould casting

Abstract

The invention discloses a semi-slit type gating system for use in aluminium alloy sand mould casting, which comprises a sprue, an upper runner, a secondary sprue, a lower runner vertical cylinder and a semi-slit type pouring gate. A smelted aluminium inlet end of the upper runner is provided with a filter and an ingate is arranged on the middle part of the upper runner. The casting system of the invention can effectively solve the problem of secondary slagging of the casting system, overcomes the shortcomings of complex shape, high labour intensity and the like, greatly improves the production efficiency, increases the casting yield to more than 97 percent from the original 70 percent in actual production and also obviously promotes the mechanical properties of upper components.

Description

technical field [0001] The invention relates to a metal casting gating system, in particular to an aluminum alloy sand casting semi-slotted gating system. Background technique [0002] Casting is a highly practical application technology combining science and practice. In many fields, such as high-end technical products such as aerospace, automobile industry, ships, vehicles and various machinery manufacturing, the development of advanced equipment is often hindered due to unqualified castings, which seriously restricts the development of society. [0003] Our ancestors had world-leading bronze casting technology (Simuwu Dafang Ding) as early as the Shang and Zhou Dynasties, which has become the pride of our Chinese descendants. The "Great Bell of Yongle" in the modern Ming Dynasty also amazed people all over the world! This is the immortal contribution made by our ancestors to the development of world civilization. So far, people have not been able to detect the mystery ...

AI Technical Summary

Problems solved by technology

Although my country's aluminum alloy castings are growing rapidly with an average annual growth rate of 10%, they still cannot meet the market demand.

[0006] In the prior art, in the pouring process of the slot-type pouring system, the water in the upper and lower inner runners cannot be filled according to the design, resulting in too much molten metal entering the bottom layer, forming an unideal temperature distribution state with high temperature in the lower part, and at the same time Since the molten metal enters through the runner, the drop of the gap vertical cylinder is large, and secondary slagging is easy to occur, and the filtering facilities in the gating system cannot completely remove the generated slag, so that the castings are on the outer surface of the upper box, lower A large number of slag inclusion holes are formed on the inner surface of the box, which makes the surface quality unqualified, and seriously causes pressure leakage of container castings

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