Brush wheel resin grinding sheet for grinding printed circuit board and manufacturing method thereof

Abstract

The invention discloses a brush wheel resin grinding disc for grinding a printed circuit board and a manufacturing method thereof. The brush wheel resin grinding disc is prepared from the following raw materials in parts by weight: 10 to 25 parts of phenolic resin, 10 to 20 parts of epoxy resin, 10 to 15 parts of vinylite, 30 to 70 parts of green silicon carbide, 2 to 5 parts of AC foaming agent, 8 to 18 parts of polyamide resin, 13 to 17 parts of ethyl ester, 1 to 2 parts of silicone oil, 1 to 6 parts of silicon carbide whisker, 2 to 6 parts of aluminium borate whisker, 1 to 2 parts of starch, and 1 to 2 parts of dextrin. The brush wheel resin grinding disc for grinding the printed circuit board is long in service life, has favorable traceability for grinding materials during grinding, cannot scratch a grinding surface, is uniform in grinding force, can be used for getting a favorable and uniform grinding surface, and is cost-saving, high in production efficiency, and free of toxicity.

Description

technical field [0001] The invention relates to the technical field of ceramic brush wheel resin grinding discs for PCB grinding, in particular to a preparation method of foamed resin grinding discs. Background technique [0002] Contemporary PCB printed board production is facing the challenges of high integration of electronic components, the development of assembly technology and market competition, and promotes the development and major reform of PCB materials, processes, equipment, testing and standards. At present, the main resin grinding of domestic PCB boards is Use non-woven brush wheels for grinding, phenolic resin grinding discs, make ceramic brush wheels for grinding, or use resin ceramic brush wheels with polyvinyl alcohol as a binder for grinding, non-woven brush wheels have a small amount of grinding, and do great damage to the orifice , the resin ceramic brush wheel of polyvinyl alcohol binder has certain elasticity and hardness, and the effect of polishing a...

AI Technical Summary

Problems solved by technology

[0002] Contemporary PCB printed board production is facing the challenges of high integration of electronic components, the development of assembly technology and market competition, and promotes the development and major reform of PCB materials, processes, equipment, testing and standards. At present, the main resin grinding of domestic PCB boards is Use non-woven brush wheels for grinding, phenolic resin grinding discs, make ceramic brush wheels for grinding, or use resin ceramic brush wheels with polyvinyl alcohol as a binder for grinding, non-woven brush wheels have a small amount of grinding, and do great damage to the hole , the resin ceramic brush wheel of polyvinyl alcohol binder has certain elasticity and hardness, and the effect of polishing and grinding resin grinding resin is good, but it has certain disadvantages, such as long production cycle, low strength, large wear and tear, and toxicity in the preparation process. Big, harmful to the human body, the brush wheel made of phenolic pressed resin abrasive, the brush wheel is heavy, the hardness of the grinding plate is high, the accumulation of abrasives is easy to produce deep scratches, and the vibration of the brush wheel

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