Slender casting mould assembling positioning pin

Abstract

The invention discloses a slender casting mould assembling positioning pin which comprises a positioning pin body. The positioning pin body is of an asymmetric cone table integral structure with the large middle and two small ends and can be divided into the upper part and the lower part; the upper part is a slender cone table body with the smaller taper, and the lower part is a cone table body with the large taper; the boundary of the upper part and the lower part is bottom faces of the cone table bodies; and when an upper box sand mould and a lower box sand mould are assembled, the lower part of the positioning pin is placed in a lower positioning pit which is matched with the lower part in shape, the upper part of the positioning pin is aligned at an upper positioning pit which is matched with the upper part in shape, and thus accurate positioning mould assembling by a crane is facilitated. The slender casting mould assembling positioning pin is simple and reliable, by increasing the height of the upper part of the positioning pin and the mould assembling height of the upper positioning pit which is matched with the upper part in shape, accurate positioning mould assembling operation of tall thin-walled box castings is facilitated, and the problem that due to the mould assembling defects and mould assembling unstability of a traditional symmetrical positioning pin, sand rubbing and shifting are prone to occurring is avoided.

Description

technical field [0001] The invention belongs to the field of mechanical casting, and in particular relates to a locating pin for a thin and high-profile casting box. Background technique [0002] In hardened sand casting, the sand mold is hardened and removed, the upper and lower cores are coated, and the upper and lower sand molds are combined. Closing is the last key process of molding. It is required that the upper and lower sand molds should be joined and positioned accurately, and there should be no deviation in the four horizontal directions and the vertical direction. Otherwise, it will cause the wrong mold of the casting, the size does not match, the casting mold leaks, the workload of casting grinding will increase or be scrapped. [0003] In the traditional hardened sand molding production process, the upper positioning pit of the upper box sand mold, the lower positioning pit of the lower box sand mold, and the metal positioning pins with upper and lower symmetri...

AI Technical Summary

Problems solved by technology

However, for tall and thin-walled box castings, due to the high sand core of the upper box and the small cavity space, there are great disadvantages in the process of box closing operation, which may easily cause unstable box closing, sand rubbing, and sand rubbing between the cavity and the sand core. Typotype defect

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