Hollow through-hole investment mold shell structure for vacuum suction casting process of high temperature resistant alloy

Abstract

The invention provides a hollow through hole fired mold shell structure. The hollow through hole fired mold shell structure is characterized in that a main body of the mold shell structure is of a hollow through hole structure, and the upper portion of the hollow through hole is provided with a platform protruding outwards and venting holes; a base is arranged on the lower portion of the hollow through hole; reinforcing connecting pieces are arranged between the base and the outer wall of the hollow through hole; mold shell castings are evenly distributed on the outer wall of the hollow through hole; the mold shell castings are connected with the hollow through hole through a pouring gate system; and the pouring gate system comprises an elbow pouring gate, a mold filling pouring gate and a feeding pouring gate. By arranging the venting holes and all the components again, the hollow through hole fired mold shell structure has greater functional characteristics. By applying the hollow through hole structure and the reinforcing structures, the effects that an alloy solution ascends in the mold filling stage and the alloy solution in the hollow through hole flows back rapidly in the pressure relief stage are guaranteed, and the hollow through hole fired mold shell structure has outstanding beneficial effects.

Description

technical field [0001] The invention relates to a hollow through-hole investment mold shell structure, in particular to a hollow through-hole investment mold shell structure used in a high-temperature-resistant alloy vacuum suction casting process. Background technique [0002] The vacuum suction casting described in the present invention belongs to the special casting process and is an advanced casting technology. Because of its high utilization rate of liquid metal, high casting precision, high quality, energy saving, low cost and other advantages, it is widely used in the manufacture of many important precision castings such as commercial machinery, gun parts, steam turbine blades, missile wings, etc. in developed countries . This technology was patented by the American Hitchiner Company in 1975, and the core technology was blocked. At present, vacuum suction casting is mainly used in precision casting of low-temperature alloys such as aluminum alloys in China, and is r...

AI Technical Summary

Problems solved by technology

However, the strength and air permeability of the fully enclosed formwork structure are a pair of contradictory properties, which makes it difficult for most formwork structures on the market to adapt to the casting process of vacuum suction casting of high-temperature resistant alloys. The demand for this kind of precision castings is indeed becoming more and more vigorous. Because the existing mold shells cannot meet the standards, the output is not high, but if the production is forced, various dangerous accidents will easily occur

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