Abrasive tool making process – material – or composition – Laminating
Patent
1981-04-06
1983-08-30
Derrington, James H.
Abrasive tool making process, material, or composition
Laminating
51307, 51308, B24D 328
Patent
active
044014422
ABSTRACT:
A process for producing a highly porous and extremely hard resinoid rotating disk grindstone that withstands rapid rotation comprising the steps of forming uncalcined unit grindstones by inserting 1-3 glass mesh cloths into a layer of polishing powder every 2-10 mm in the grindstone; press molding this reinforced composition; and these unit grindstones being laminated and united by calcination. The grindstone obtained using this process is highly porous compared to ordinary composite grindstones. Its bulk specific gravity is 2.2 or below and the degree of bonding indicates great hardness (0.25 or below). Also, its grinding capacity proved to be about 2-3 times that of grindstones formed using the same materials, and about 1.3-1.8 times that of commercial high-performance products.
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Daichiku Co., Ltd.
Derrington James H.
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