Shakeout screen modeling sand pulverizer

Abstract

The invention relates to a shakeout screen modeling sand pulverizer, comprising a driving motor, a motor belt pulley, a V-belt, a passive belt pulley, an impeller shaft, impellers, beating rods, a bearing pedestal, a frame and a hopper. The pulverizer has the following characteristics: each impeller is inlayed with four beating rods; cutting edges of the impellers are mutually staggeringly and uniformly arranged on the impeller shaft; the bearing pedestal is arranged on an upper part of the frame; the hopper is arranged on a lower part of the frame; the driving motor is arranged on an external side of the frame; and edges of the impellers keep a distance with the shakeout screen. The pulverizer has strong fragmentation capability, good fragmentation effect and self overload protection function, and is easily maintained and with an extreme low failure rate, etc.

Description

technical field [0001] The invention relates to a shakeout sieve type sand grinder, in particular to a dropout sieve type sand grinder for separately processing molding sand and castings, and belongs to the technical field of casting dropout sieves. Background technique [0002] In the foundry industry, the shakeout screen has closed and open shakeout methods, especially for the automatic line high-pressure molding line, the shakeout screen is only 2.5 meters long for the open shakeout screen, it is necessary to effectively crush the molding sand. It is very difficult, especially for the production of small castings and waste molds, when the molding sand is not completely sintered, the hardness of the molding sand is very high after being compacted by the pressure head under high pressure. The residence time in the sieve body is short, and the large compacted molding sand is not shattered under the vibration of the vibrating motor, and then flows into the sand return belt sy...

AI Technical Summary

Problems solved by technology

[0002] In the foundry industry, the shakeout screen has closed and open shakeout methods, especially for the automatic line high-pressure molding line, the shakeout screen is only 2.5 meters long for the open shakeout screen, it is necessary to effectively crush the molding sand. It is very difficult, especially for the production of small castings and waste molds, when the molding sand is not completely sintered, the hardness of the molding sand is very high after being compacted by the pressure head under high pressure. The residence time in the sieve body is short, and the large compacted molding sand is not shattered under the vibration of the vibrating motor, and then flows into the sand return belt system, sometimes causing the belt and the lower sand port to be blocked, resulting in a large number of sand running failures, and the strength is very high Larger and larger sand blocks cannot be broken in the trommel screen, and the shape evolves into spherical sand blocks. These unbreakable sand blocks flow into the waste sand system, which leads to a continuous reduction in the amount of recycled sand and continuous replenishment of new sand. , the vicious cycle of large fluctuations in various process indicators of the molding sand and high waste rate of the molding line, resulting in great economic losses

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