Feeder head knock-off core

Abstract

The invention relates to the cast field, in particular relates to a knock-off core between a cast cavity and a feeder head. The feeder head knock-off core solves the technical problems that a cast feeder head and a cast main body in the existing feeder head knock-off core have high connection strength, the cast feeder head is hard to separate from the cast main body, and the separation work of the cast feeder head and the cast main body has high strength in the prior art. The invention provides a feeder head knock-off core, wherein the cast feeder head and the cast main body have low connection strength, the cast feeder head is easy to separate from the cast main body, the separation work strength of the cast feeder head and the cast main body is low, and the processing work load after the casting of the cast main body is low. The feeder head knock-off core provided by the invention comprises a knock-off core main body on which a liquid communicating hole for communicating upper and lower surfaces of the knock-off core is arranged; the liquid communicating hole comprises an upper liquid communicating hole and a lower communicating hole; and cross section outlines of the upper and lower communicating holes are in four-pointed star shape or five-pointed star shape or six-pointed star shape, and a lower opening of the upper liquid communicating hole is congruent to a small opening of the lower communicating hole.

Description

technical field [0001] The invention relates to the field of casting, in particular to an easy-cut piece arranged between a casting chamber and a riser. Background technique [0002] At present, in casting production, in order to avoid defects in castings, a riser structure is often arranged above or on the side of the casting cavity of the casting device. The existing riser structure generally consists of a riser and an easy-cut piece arranged at the lower end of the riser and communicated with the cavity of the casting. During casting, the cavity of the riser is a container for storing high-temperature liquid metal, and the stored molten metal will be filled back into the cavity of the casting during cooling and shrinkage of the casting, so as to avoid shrinkage cavity or porosity of the casting and improve the quality of the casting. Density. The remaining molten metal in the riser cavity that is not backfilled into the casting cavity is formed into a casting riser conn...

AI Technical Summary

Problems solved by technology

[0005] The invention mainly solves the technical problems of high connection strength between the casting riser and the casting body in the prior art, difficulty in separating the casting riser and the casting body, and high separation work strength between the casting riser and the casting body, and provides a casting riser The connection strength between the mouth and the casting body is low, the separation of the casting riser and the casting body is easy, and the separation of the casting riser and the casting body is easy to cut the riser with low working strength

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