Centralizing mechanism of lower ejector core rod for sand casting die

Abstract

The invention relates to a centralizing device of a lower ejector core rod. The lower ejector core rod is fixedly arranged on a lower ejector core plate through a press plate and a screw; gaps are respectively reserved between a hole of the lower ejector core plate and the surrounding surface, upper surface and lower surface of the lower ejector core rod. Because the installed lower ejector core rod cannot be vertical to the plane of the lower ejector core plate, and the inclining angle of each lower ejector core rod is not fixed, the centralizing device of the lower ejector core rod can solvethe problem of verticality of the lower ejector core rod corresponding to the lower ejector core plate. A guide plate of the lower ejector core rod is vertically arranged on a lower fixed plate, namely that the guide plate of the lower ejector core rod is arranged at the tail end of the lower ejector core rod; after the lower ejector core rod penetrates through the lower ejector core plate, and then penetrates through the guide plate of the lower ejector core rod, the verticality of the lower ejector core rod can be well maintained, so as to facilitate a lower core box to simultaneously penetrate through all lower ejector core rods.

Description

technical field [0001] The invention relates to a centering mechanism for a lower core rod of a sand casting mould, which belongs to the field of mechanical manufacturing. Background technique [0002] Sand casting is to use molds and other process equipment to make "sand molds", then fill liquid metal into the sand molds, and obtain castings after cooling. Compared with other molds, it is more complex and can produce extremely complex products such as engine cylinder heads. [0003] Sand casting molds are often disassembled and repaired during the production process, especially when the lower core box is disassembled and reinstalled, each ejector rod needs to pass through the corresponding ejector rod hole on the lower core box at the same time to install the core box Returning to the position, since there are usually a large number of lower ejector rods and none of them are in a vertical state, it is more difficult to reset the lower core box. Each reset requires several ...

AI Technical Summary

Problems solved by technology

[0003] Sand casting molds are often disassembled and repaired during the production process, especially when the lower core box is disassembled and reinstalled, each ejector rod needs to pass through the corresponding ejector rod hole on the lower core box at the same time to install the core box Returning to the position, since there are usually a large number of lower ejector rods and none of them are in a vertical state, it is more difficult to reset the lower core box. Each reset requires several workers to cooperate with the lower ejector rods, and it takes a long time , greatly affecting work efficiency

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