Title:
POROUS SUPER ABRASIVE GRAIN MELAMINE BOND WHEEL AND PRODUCTION METHOD THEREFOR
Document Type and Number:
Japanese Patent JP3661956
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To make a product whose porosity is a specific volume % or higher and which has a uniform foaming structure without using any foaming agent by forming pores out of vaporized material such as moisture generated at the time of heat-curing reaction of melamine resin.
SOLUTION: Abrasive grain is mixed with average 5μm diamond of 25 volume %, melamine resin of 70 volume % as resin and PVA of 5 volume %. The mixture is charged in a temporary forming metallic mold and compressed under pressure of 13.9 MPa at normal temperature. It is then heated at 155°C for 30 minutes in a molding furnace. While heating, the pressure in the molding furnace is increased as much as possible in the range of capable of foaming with vaporized material such as moisture generated at the time of heat-curing reaction of melamine resin, which is indicated in a formula. A wheel is formed, which is like a pellet of 30mm in diameter and 15mm in thickness and has the porosity of 60 to 90 volume %. It is thus possible to distribute pores uniformly in all produced wheels whose porosity of 60, 70, 80 and 90 volume %.
Inventors:
Takuya Senba
Keizo Takeuchi
Tomohiko Akiyama
Keizo Takeuchi
Tomohiko Akiyama
Application Number:
JP4661596A
Publication Date:
June 22, 2005
Filing Date:
February 07, 1996
Export Citation:
Assignee:
Noritake Super Abrasive Co., Ltd.
Noritake Company Limited
Noritake Company Limited
International Classes:
B24D3/00; B24D3/32; C08J9/02; C08L61/20; C08L61/28; (IPC1-7): B24D3/32; B24D3/00
Domestic Patent References:
| JP61192480A | ||||
| JP59142069A |
Other References:
仙波卓弥他3名,多気孔性メラミンボンドホイールの開発と金型材料の精密研削,日本機械学会論文集(C編),日本,日本機械学会,1995年,61巻/585号,P.352-P.358
Attorney, Agent or Firm:
Masu Kobori
Takato Tsutsumi
Takato Tsutsumi
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