Equipment for preparing mixed crude sand of sand core and method for preparing mixed crude sand

Abstract

The invention relates to a device for preparing mixed roughing sand of a sand core and a method for preparing the mixed roughing sand. The device comprises a regenerated sand storage hopper and a new sand storage hopper which are arranged in parallel, a disk feeder, a belt conveyer, a hoisting machine, a sand hopper, a sand conveyer, a sand mixer and the like. The method comprises the following steps: putting regenerated sand into the regenerated sand storage hopper and putting new sand into the new sand storage hopper simultaneously with the weight ratio of the regenerated sand to the new sand being 1:1; unloading the regenerated sand and the new sand to the belt conveyer at the same time; conveying the regenerated sand and the new sand to the sand hopper and then mixing the regenerated sand and the new sand in the sand hopper; and conveying the mixed sand to the sand mixer through the sand conveyer, and controlling quantitative mixed sand to enter the mixer to be mixed with resin therein so as to form the mixed roughing sand of a sand core. The device and the method have the advantages of effectively controlling the product quality, and preventing a regenerated sand core from being sintered and generating veins.

Description

technical field [0001] The invention relates to a production equipment and a preparation method of raw sand, in particular to a device for preparing a mixed raw sand for a sand core and a method for preparing the mixed raw sand. Background technique [0002] Raw sand is the most basic raw material for foundry core making. The quality assurance of raw sand is directly related to the quality of the inner cavity of our castings. With the prosperity of the machinery industry and the increasingly fierce competition, the cost reduction project of enterprises is imminent. Enterprises that mainly produce medium and large castings such as diesel engine cylinder blocks and cylinder heads use a huge amount of sand. The three major workshops use an average of about 100 tons of sand per day for cold core boxes. In the process of core making, handling, and core repairing, discarded sand cores are inevitably generated, and some mixed cold box resin sand has to be wasted when replacing mol...

AI Technical Summary

Problems solved by technology

Although the recycled sand meets the acceptance criteria of the original sand, the performance of the recycled sand is not as good as that of the new sand in many aspects. Therefore, the quality of the inner cavity of the casting after using the recycled sand to shoot the core of the refrigeration core box fluctuates greatly, and the corners of the inner cavity often appear Sintering and veining will occur, which will affect the overall quality of our castings and increase the difficulty of cleaning

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