Drum type sand mixer and sand mixing method thereof

Abstract

The invention provides a drum type sand mixer and a sand mixing method thereof. The sand mixer comprises a drum and an airtight shell. The drum is transversely arranged in the airtight shell in the axis direction. The airtight shell is provided with a vacuum pipe, and the vacuum pipe is used for being connected with vacuumizing equipment so as to pump air in the airtight shell. A rotor and / or a roller are / is further transversely arranged inside the sand mixer. During sand mixing, sand and auxiliary materials are fed into a hopper of a drum, vacuumizing treatment is conducted, drying mixing is conducted, and wet mixing is conducted after vacuum is removed so that mixed sand can be obtained. According to the drum type sand mixer and the sand mixing method thereof, vacuum sand mixing is adopted, so that the influence of air on very light materials is avoided or reduced, the loss that light materials are pumped away by a dust remover is avoided, and sand mixing uniformity is improved. By the adoption of the drum type structure, the drum and the rotor are transversely arranged, a sand mixing dead zone is avoided, the stirring effect is improved, and thus the sand mixing uniformity is improved, the sand mixing quality is improved, and energy consumption is lowered.

Description

technical field [0001] The invention relates to the technical field of casting machinery and equipment, in particular to a sand mixer and a sand mixing method. Background technique [0002] In green sand casting, the quality of molding sand is directly related to the quality of castings and the reject rate of castings. With the development of modern molding technology, the amount of molding sand required is increasing. At present, the largest sand processing in the world requires Provide 1000 tons of molding sand per hour. This puts forward higher and higher requirements on the equipment for mixing molding sand-sand mixer. [0003] Before the 1980s, the sand mixer mainly used the roller-type sand mixer. Due to the rolling and moving effect of the roller, the quality of the mixed molding sand was good, but its mixing and grinding Disc molding sand takes more than 5 minutes. However, as more and more molding sand is required to be mixed by sand mixers, sand mixing per hour ...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a sand mixing machine and a sand mixing method to solve the existing problems in the existing sand mixing machines, such as dead angle of sand mixing, poor quality of sand mixing, slow reduction of sand temperature, and high price.

[0009] Another object of the present invention is to provide a sand mixer and a sand mixing method to solve the problems in the existing sand mixer that a large amount of auxiliary materials are easy to lose and the humidity of the sand material is difficult to accurately control

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