Abrasive tool making process – material – or composition – Pore forming
Patent
1978-12-20
1980-10-07
Arnold, Donald J.
Abrasive tool making process, material, or composition
Pore forming
51298, 51302, C09K 314
Patent
active
042266025
ABSTRACT:
Resinoid abrasive wheels are continuously produced by preparing pore forming granules having predetermined mechanical strength and containing a substance thermally decomposable at a baking temperature for the production of resinoid abrasive wheels and a blowing agent, kneading the pore forming granules with abrasive grains and a thermosetting synthetic resin binder to prepare an abrasive composition, molding the abrasive composition into a block, heating the block by a high frequency heater, rolling the heated block into a sheet by a multiplicity of pairs of rolls, blanking out circular pieces from the sheet, and baking the circular pieces to cure the binder therein and form pores by the decomposition of at least part of the thermally decomposable substance contained in the granules and by the decomposition of the blowing agent contained in the granules. The resinoid abrasive wheels obtained have pores uniformly dispersed therein.
REFERENCES:
patent: 3476537 (1969-11-01), Markotan
patent: 3950148 (1976-04-01), Fukuda
patent: 3950149 (1976-04-01), Fukuda
patent: 4038047 (1977-07-01), Haywood
patent: 4086067 (1978-04-01), Busch
patent: 4115077 (1978-09-01), Fukuda
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