Composite base material polishing grinding apparatus and preparing method thereof

Abstract

The invention relates to the technical field of grinding polishing machining, in particular to a composite base material polishing grinding apparatus and a preparing method thereof. The composite base material polishing grinding apparatus comprises a composite base material and an abrasive material attached to the composite base material, the composite base material is formed by compounding a TPU thin film and a PET thin film through a modified adhesive, and the modified adhesive is prepared from, by weight, 100 parts of modified polyurethane resin, 10-20 parts of a curing agent, 5-30 parts of a filler and 10-40 parts of an organic solvent. Compared with the prior art, the self-made modified adhesive is adopted, a transfer binding method is adopted, the high-elasticity TPU thin film and the high-strength PET thin film are firmly bonded together, and therefore the composite base material has the high mechanical strength and heat-resisting and wear-resisting property, and has the excellent elasticity and softness; and the made polishing grinding apparatus meets premise polishing requirements of paint face repairing, irregular surfaces and curve faces and the like.

Description

technical field [0001] The invention relates to the technical field of grinding and polishing, in particular to a composite substrate polishing abrasive tool and a preparation method thereof. Background technique [0002] Polishing is the modification of the surface of a workpiece using polishing tools and abrasive particles or other polishing media. For some products with high surface precision requirements, they must be polished and ground accordingly, especially for products with irregular shapes or curved surfaces (such as automobile manufacturing and repair, 3C electronics industry), traditional polishing abrasives cannot meet the requirements. Requirements, the surface of the product must be polished and polished with precision polishing abrasives, such as polishing discs, polishing sheets, etc. In the prior art, this type of precision polishing abrasive tool is composed of abrasive materials with grinding and polishing functions and polymer substrates. For example, t...

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Problems solved by technology

Yet, although TPU base material has improved the elasticity and softness of polishing abrasive tool, its mechanical strength, high temperature resistance, anti-friction performance are all insufficient, in order to make polishing abrasive tool have above-mentioned functions concurrently, inventor tries to have the above-mentioned function Several polymer materials are compounded together, but experiments have found that for TPU and other different types of polymer materials, it is very difficult to bond polymer materials, especially TPU has a large stretchability, which makes TPU and other polymer materials The adhesion between materials is very difficult, resulting in unstable performance of the composite polymer substrate, which cannot meet the requirements of high-precision polishing

This is the key technology that is currently difficult to overcome; in addition, the existing polishing abrasives, due to insufficient adhesion between the abrasive and the substrate, the phenomenon of sand falling off during grinding, and the coalescence of grinding debris leads to clogging phenomenon, resulting in scratches on the surface of the polished product, such as substandard quality, and a short service life of the abrasive tool. Therefore, the existing polishing abrasive tools cannot meet the needs of precision polishing such as irregular shapes or curved surfaces.

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