Precise bubble-free casting process for hardware castings

Abstract

The invention discloses a precise bubble-free casting process for hardware castings, and belongs to the technical field of casting. A specially-made casting device is arranged, and a hardware sleeve is cast through the casting device. A core vent hole and an inner through core hole are formed in the casting device, so that gas generated at a core head can flow out conveniently in the casting process, and then the generation of invasive bubbles can be effectively reduced. A pouring liquid gas evolution pipe is arranged in the casting device, so that a dual acceleration effect can be provided for molten metal, therefore the evolution of gas in the molten metal is remarkably improved, and the generation of evolved bubbles is reduced. A cavity self-gas-leakage assembly is arranged in the casting device, so that the outflow of gas generated by pouring in a cavity can be facilitated, and therefore the generation of invasive bubbles is further reduced. The bubbles can be effectively preventedfrom appearing on the hardware sleeve from the reason of bubble generation, so that the yield of the sleeve is remarkably improved, resources are saved, and the production efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of casting castings, in particular to a precision bubble-free casting process for metal castings. Background technique [0002] Castings are metal shaped objects obtained by various casting methods, that is, the smelted liquid metal is poured into the pre-prepared mold by pouring, injection, suction or other casting methods, and after cooling, it is polished and other subsequent processing methods , the resulting object has a certain shape, size and performance. The uses of castings are very extensive, and their uses are showing a trend of continuous expansion. They have been specifically used in construction, hardware, equipment, machine tools, ships, aerospace, automobiles, locomotives, electronics, computers, electrical appliances, lamps and other industries. Castings in the hardware industry are collectively referred to as hardware castings. [0003] Metal casing is one of the common metal castings, it...

AI Technical Summary

Problems solved by technology

[0004] In the prior art, when casting metal casings, air bubbles (pores) are likely to appear on the casing, and the air bubbles will reduce the strength of the casing, leading to the scrapping of the casing, thereby greatly reducing the yield, not only causing waste of resources, but also Affect the production efficiency of casing

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