Semi-mold pre-filling titling casting process and special mold

Abstract

Provided is a semi-mold pre-filling titling casting process and a special mold. The process includes a lower semi-mold pre-filling and an upper semi-mold pre-filling. The special mold comprises an upper half cavity (1), a lower half cavity (2), a sprue cup (4), an upper half cavity riser (5), a lower half cavity riser (6) and a flow choking section (7). The semi-mold pre-filling titling casting process has the advantages that in the titling gravity casting process, falling difference of aluminum alloy liquid in the titling pouring process can be reduced through adoption of the semi-mold pre-filling process, fluid is enabled to fill the cavity smoothly, and heat loss is also reduced. generation of secondary oxidation inclusions in the pouring process are reduced, meanwhile the unfilled upper semi-mold can play a role of deslagging and exhausting in the titling process, and occurrence rate of holes are greatly reduced.

Description

Technical field [0001] The invention relates to the field of casting technology, in particular to a semi-prefilled tiltable casting technology and a special mold. Background technique [0002] At present, the aluminum alloy tilting gravity casting process refers to a casting production method in which the metal mold relies on the continuous change of the tilt angle to continuously fill the cavity with fluid during the tilting process. It combines the advantages of bottom injection and top injection, so The liquid filling of aluminum alloy is stable, reducing casting defects such as slag porosity. The casting process is a newly developed advanced casting process, which is widely used in many countries with more developed casting industries in the world, especially in some European countries. It is used to cast large thin-walled castings such as automobile condenser gas chambers. . In my country, the tilting gravity casting process has only just emerged in the past ten years, has...

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Problems solved by technology

[0003] The purpose of the present invention is aimed at the current tilting gravity casting process, although compared with traditional top pouring, step pouring and bottom pouring, it can obviously reduce the generation of secondary oxidation inclusions in the casting process of alloy liquid, but for some complex or large castings, if The unreasonable design of the gating system will also produce a large proportion of slag pores. At present, there is no unified specification for the tilting gravity casting gating system in China, and a half-shaped pre-filled tilting casting process is provided.

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