Metal mold sand coating device for casting upper mold of brake drum

Abstract

The invention discloses a metal mold sand coating device for casting an upper mold of a brake drum, aiming at solving the problems that the compactness of shot sand is insufficient, hardening an overlaying layer takes a long time, a sand box wall, an upper mold wall and a lower mold wall are thin, and the device is easy to rupture in the process of repeated use. The metal mold sand coating device for casting the upper mold of the brake drum comprises an upper sand box (1) and an upper mold body (7); the upper sand box (1) is provided with an exhaust hole (3) and a shot sand hole (4); a positioning pin (5) and a positioning pin sleeve (6) press the upper sand box (1) and the upper mold body (7) to form a sand casting gap (2); the sand casting gap (2) is 6-10mm thick; the upper mold body (7) is internally fixedly provided with an electric heater (8) and a temperature sensor (9); and an exhaust groove (10) is arranged at the opening end of the upper mold body (7), that is, the tail end of the sand casting gap (2) formed by pressing the upper sand box (1) and the upper mold body (7). The invention improves the recycling efficiency of the sand box and the mold.

Description

technical field [0001] The invention relates to a casting tooling equipment for a vehicle brake drum, in particular to an iron mold sand-coating device for casting the upper shape of the brake drum by using a metal mold sand-coating process. Background technique [0002] Brake drums are widely used in the automotive industry. The traditional production process of brake drum mainly adopts green mold sand manual molding or green mold sand mechanical molding. These two methods have the defects of serious out-of-round casting, poor surface quality, low production efficiency and large sand consumption. The Chinese Invention Patent No. is ZL200610144119.1, titled "Method for Manufacturing Brake Drums Using Metal Mold Sand Covering Technology", which discloses a method of manufacturing brake drums using metal mold sand coating technology, which overcomes the limitations of green mold sand molding. The above defects, as well as the difficulty in determining the parting surface cau...

AI Technical Summary

Problems solved by technology

[0003] The metal mold sand coating device for casting the upper mold of the brake drum provided by the invention solves the problems in the prior art that the compactness of the sand shot is not enough, the time required for the sand coating layer to harden is long, the wall thickness of the sand box, the upper mold wall Both the thickness of the thick and lower models are too thin, which is a technical problem that is easy to break during repeated use

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