Die for cast copper impeller casting

Abstract

The invention discloses a die for cast copper impeller casting. The die for cast copper impeller casting comprises a pouring die, wherein the pouring die comprises a casting box, a thermistor is further installed around the inner side of the casting box, and the thermistor is fixed into the casting box through a heat-resistant brick; and the thermistor is connected with an external power supply through a conductive wire. According to the die for cast copper impeller casting, before pouring, casting sand is heated through the heating of the thermistor, so that the effects of steam removal and moisture removal are achieved; meanwhile, the temperature of the casting sand is increased, and the temperature difference between molten copper and the casting sand is reduced, so that the phenomenonof cold shut caused by the temperature drop difference due to the non-uniform thickness of a casting is prevented; with the adoption of the casting die and the casting process thereof, the thicknessesof a hub, a front cover plate, a rear cover plate and blades of the cast bronze double-suction impeller manufactured by the casting die and the casting process are uniform and little in difference, and the shapes are regular and level; and moreover, the problem of high pouring rejection rate caused due to the inconsistency of the melting points and oxidability of copper, aluminum and iron can beavoided.

Description

technical field [0001] The invention belongs to the casting field of cast copper impellers, and relates to a casting technology, in particular to a casting mold for cast copper impellers. Background technique [0002] Cast bronze is bronze used to produce castings. Bronze castings are widely used in machinery manufacturing, ships, automobiles, construction and other industrial sectors, forming cast bronze series in heavy non-ferrous metal materials. Commonly used cast bronzes include tin bronze, lead bronze, manganese bronze and aluminum bronze. [0003] Due to the cast bronze (ZCuAl10Fe3) double-suction impeller hub, the front and rear cover plates, and the thickness of the blades are uneven, the difference is large, and the shape is distorted. However, the melting points of copper, aluminum, and iron are inconsistent, the oxidation properties are inconsistent, and the casting reject rate is very high. [0004] In order to solve the above defects, a solution is now provid...

AI Technical Summary

Problems solved by technology

However, the melting points of copper, aluminum, and iron are inconsistent, the oxidation properties are inconsistent, and the casting reject rate is high.

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