Stirring mechanism of precoated sand mixer

Abstract

The invention provides a stirring mechanism of a precoated sand mixer. The stirring mechanism can realize stirring to uniformly mix sand, a molding sand binder and an auxiliary material and has a good mixing effect. The stirring mechanism comprises a main shaft, wherein a turntable is arranged at the upper end of the main shaft. The stirring mechanism is characterized in that swing wheels and stirring rods are respectively arranged on the turntable.

Description

technical field [0001] The invention relates to the technical field of regenerated sand production, in particular to a stirring mechanism of a coated sand sand mixer. Background technique [0002] Coated sand, the surface of the sand grains is covered with a layer of solid resin film or core before molding. Coated sand molding is used in complex castings with high dimensional accuracy requirements. It is one of the best molding materials for automobiles, tractors, hydraulic parts, etc. , with the development of machinery industry at home and abroad, especially the automobile industry, the quality requirements of castings are getting higher and higher, and the application of coated sand is becoming more and more extensive. [0003] The sand mixer is an important equipment in the production of coated sand. By mixing the sand, molding sand binder and auxiliary materials evenly, the binder and auxiliary materials are evenly distributed and effectively coated on the surface o...

AI Technical Summary

Problems solved by technology

[0003] The sand mixer is an important equipment in the production of coated sand. By mixing the sand, molding sand binder and auxiliary materials evenly, the binder and auxiliary materials are evenly distributed and effectively coated on the surface of the sand grains, and the sand and molding sand are bonded together. The agent and auxiliary materials need to achieve the purpose of uniform mixing, that is, the entire sand surface with the adhesive can be covered with the curing agent, otherwise if some sand (or even a small part) is not covered with the curing agent, the coating The resin of the coated sand is still in a thermoplastic state at the curing temperature, which will inevitably reduce the thermal and room temperature strength of the coated sand, and this part of the coated sand in the thermoplastic state will also bond to the mold, resulting in rough surface of the core.

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