Method for manufacturing low-polymerization-degree full resin coated grinding tool

Abstract

The invention relates to a method for manufacturing a low-polymerization-degree full resin coated grinding tool, which comprises the following steps: firstly, coating a rubber matrix on one lateral surface of a base material to form a bottom rubber layer, and then performing sand-planting on the bottom rubber layer, wherein the rubber matrix in the bottom rubber layer contains liquid water soluble phenolic resin, calcium carbonate and a coupling agent; drying the bottom rubber layer after the sand-planting, namely performing the drying in a drying chamber suspension mode, and performing high-temperature drying at a temperature of between 90 and 100 DEG C for 20 minutes to 3 hours to promote the drying of the bottom rubber layer and basically volatilize the volatile components; coating the rubber matrix on the bottom rubber layer after the sand-planting to form a complex rubber layer; drying the complex rubber layer in the same drying mode; and finally performing solidification. The product of the coated grinding tool manufactured by the technique has uniform and consistent inner quality and uniform appearance quality without chromatism, thus both the service performance and the commercial performance of the product are greatly improved, and the consistency and the uniformity of the product are ensured.

Description

technical field [0001] The invention relates to a method for manufacturing coated abrasive products. Background technique [0002] There are many kinds of adhesives for coated abrasive products in the world, such as hide glue, urea-formaldehyde resin, epoxy resin, alkyd resin, phenolic resin, etc. Among them, hide glue, urea-formaldehyde resin, epoxy resin and alkyd resin are mainly used in the environment with low pressure load or manual grinding during the grinding process, while phenolic resin is mainly used in the grinding process environment with heavy load . [0003] Liquid water-soluble phenolic resin is currently the most widely used adhesive for coated abrasives in the world, but it also has a very prominent shortcoming, that is, the reaction speed is relatively slow. In the manufacturing process of coated abrasive products, a secondary curing process is required. In the coated abrasive production line, only semi-finished products are wound out at the end, and a s...

AI Technical Summary

Problems solved by technology

Coated abrasive products produced by the secondary curing process have high production efficiency, but the coated abrasive is cured at high temperature for a long time after being wound into a large roll. During the curing process, the inside and outside of the large roll are heated unevenly, resulting in There is a relatively large difference in the quality of the large roll with abrasive tools inside and outside, especially the difference in appearance and color. The innermost and outermost surfaces have been over-cured, and the product is brittle, but the middle part of the large roll may still have a degree of curing that does not meet the requirements.

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