Sand mixing and stirring cage of precoated sand mixing machine

Abstract

The invention provides a sand mixing and stirring cage of a precoated sand mixing machine. The sand mixing and stirring cage is uniform in mixing sand, short in mixing time, little in primary sand and tailing sand loss, capable of reducing waste and convenient to clear and maintain. The sand mixing and stirring cage comprises a sand mixing shell and a main shaft horizontally arranged on the sand mixing shell, wherein one end of the main shaft is connected with a driving device; two ends of the sand mixing shell are respectively provided with a sand inlet and a sand outlet; the main shaft is sequentially provided with a transmission segment and a sand mixing segment along the axial direction; the main shaft on the transmission segment is provided with a screw blade; the main shaft on the sand mixing segment is provided with a sand mixing blade; and the sand mixing shell on the sand mixing segment is respectively provided with a resin feeding valve and a curing agent feeding valve. The sand mixing and stirring cage is characterized in that the sand mixing shell comprises two semicircular sand mixing tanks, and the sand mixing shell is provided with a cleaning solution feeding valve.

Description

technical field [0001] The invention relates to the technical field of coated sand production equipment, in particular to a sand mixing cage of a coated 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. The coated sand mainly uses high-quality selected natural quartz sand as the original sand, and adds thermoplastic phenolic resin, curing agent, lubricant and reinforcing agent. etc. as raw materials. 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 domestic and foreign machinery industries, especially the automobile industry, the quality requirements for castings are getting higher and higher. High, the application of mold coating sand is more and more extensive. [0003] The sand mixer is an important equipment ...

AI Technical Summary

Problems solved by technology

[0003] The sand mixer is an important equipment in the production of coated sand. Only by adding resin binder and curing agent to the resin sand and fully mixing can the quality of the mold be guaranteed and castings that meet the requirements can be produced. Some existing The mixing effect of the sand mixer is not ideal, the design of the sand mixing cage is not reasonable, the mixing time is long, the loss of head sand and tailing sand is large, and the sand mixing cage is not cleaned for a long time, which will cause the residual sand to agglomerate. When the sand mixing space is small, the sand output is small, and the existing sand mixing cage structure is closed, which is not convenient for the cleaning of the sand mixing blades and the adjustment of the sand mixing blades.

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