Molding sand casting sand mixing device and working method thereof

Abstract

The invention discloses a molding sand casting sand mixing device and a working method thereof. The molding sand casting sand mixing device comprises a mixing box body, wherein a grinding motor and a feeding port are arranged at the top of the mixing box body respectively; an output shaft of the grinding motor extends into the mixing box body; a plurality of grinding balls are arranged on the output shaft respectively; a plurality of grinding protrusions are arranged on the grinding balls; a grinding body is arranged between grinding balls and the inner wall of the mixing box body; a sand passing channel is reserved between the grinding body and the grinding balls; a discharging hole is formed in the lower end of the grinding body; a filtering sieve plate is arranged below the grinding body; a sand mixing area is formed below the filtering sieve plate; a stirring rod of a hollow structure is transversely arranged in the sand mixing area; a stirring motor is arranged at one end of the stirring rod; and a rotary joint is arranged at the other end of the stirring rod, and is externally connected with additive liquid. The grinding balls are arranged for sequential grinding, so that the probability of coarse sand is reduced; meanwhile, coarse sand particles can be screened out, fine sand enters the sand mixing area, and the additive liquid is sprayed while stirring is conducted, so that uniform sand mixing is achieved, and the sand mixing efficiency and the quality of finished molding sand are improved.

Description

technical field [0001] The invention relates to the technical field of sand casting, in particular to a sand mixing device for sand casting and a working method thereof. Background technique [0002] The sand mixer is a device that uniformly mixes the components in the molding sand and effectively coats the binder on the surface of the sand grains. The sand mixer is the main equipment for casting sand processing and molding sand mixing, and it is also the key equipment for obtaining qualified molding sand. The existing sand mixer has the following shortcomings in the sand mixing process: 1. The coarse sand particles in the raw materials cannot be removed, which affects The quality of the finished molding sand obtained; 2. The existing sand mixer adopts the method of mixing and rolling simultaneously. With the progress of the sand mixing process, the fine particles gradually increase, and the probability of coarse particles being rolled is gradually reduced. To ensure the un...

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Problems solved by technology

Sand mixer is the main equipment for foundry sand processing and molding sand mixing, and it is also the key equipment for obtaining qualified molding sand. The existing sand mixer has the following shortcomings in the sand mixing process: 1. The coarse sand particles in the raw materials cannot be removed, which affects The quality of the finished molding sand obtained; 2. The existing sand mixer adopts the method of mixing and rolling simultaneously. With the progress of the sand mixing process, the fine particles gradually increase, and the probability of coarse particles being rolled is gradually reduced. To ensure the uniformity of the finished molding sand, it is necessary to prolong the sand mixing time, which affects the production efficiency

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