Precoated sand production line

Abstract

The invention belongs to the technical field of precoated sand production and particularly relates to a precoated sand production line. The precoated sand production line comprises a raw sand materialbin, a heating machine, a mixer, a sieve shaker and a finished product material bin. A pair of stirring wheels are arranged inside the heating machine. The edge of each stirring wheel is uniformly provided with multiple sand stirring hoppers. The stirring wheels rotate to drive the sand stirring hoppers to move in the circumferential direction. The side face of the heating machine is provided with a burning machine, wherein the burning machine outputs heat to the rotating centers of the stirring wheels. The mixer is arranged below the heating machine and internally provided with a rotating disc. The rotating disc is provided with a pair of rolling wheels. The sieve shaker is internally provided with a crushing net. According to the precoated sand production line, materials are conveyed from a high position to a low position through gravity flow; a feeding hopper lifter and a discharging hopper lifter are adopted to assist in conveying, from the low position to the high position, of the materials; equipment is reasonable in arrangement, and energy is effectively saved; the heating machine conducts heating stably and uniformly; an eccentric double-grinding wheel of the mixer is goodin film coating effect; sand obtained after mixing is subjected to crushing, screening and cooling; a precoated sand product is excellent in quality; and the work efficiency is high.

Description

technical field [0001] The invention belongs to the technical field of coated sand production, and in particular relates to a coated sand production line. Background technique [0002] The production of coated sand usually involves the following steps: the base sand (or other special sand) for making coated sand is first quantified, enters the heating system to meet the temperature requirements during mixing, and then enters the mixer, and the additives that have been quantified at the same time (resin, hardener, calcium powder, etc.) are automatically put into the mixer for stirring according to the mixing program, and then the agglomerates are dispersed, and the waste particles are screened out, and then enter the cooling system, so that the finished coated sand is put into the warehouse and then packaged. The coating effect of coated sand reflects the production quality. Heating and mixing operations are the main processes that affect the process. The temperature of raw s...

AI Technical Summary

Problems solved by technology

[0003] After the coating is completed, the product may be bonded into agglomerates due to the viscosity of the auxiliary materials. These agglomerates have low strength and are not difficult to break. The cost of ordinary grinding and crushing structures is high, the noise is large, and the structure is complicated. The cost is high, and a vibration crushing equipment is designed, which is completely crushed, does not affect the surface integrity of the coated sand, and breaks the agglomerates without affecting the product quality.

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