Abrasive tool making process – material – or composition – Miscellaneous
Patent
1992-07-07
1993-07-06
Bell, Mark L.
Abrasive tool making process, material, or composition
Miscellaneous
51298, 51309, B24D 300
Patent
active
052249689
ABSTRACT:
A method of forming abrasive grinding wheels includes the steps of preheating abrasive grains, an open circular mold and liquid epoxy binder, to a temperature below the curing temperature of the binder and at which the binder has relatively low viscosity. The binder is placed in the mold and the mold is rotated. As the mold is rotated the abrasive is added along a radian with respect to an axis of rotation of the mold. The rate of the addition of the abrasive grains and the rotational speed of the mold are controlled such that abrasive grains added during a prior rotation submerge in the binder by the time the mold again reaches the radian where more grains are added. After the binder is suitably filled with abrasive, the wheel is cured by heating and the solid mass removed from the mold and trimmed to size, removing any skin of excess binder. The method produces grinding wheels having low porosity, excellent balance and grinding characteristics. The method is suitable for use in the manufacture of super abrasive wheels as well as wheels which include conventional abrasives and fillers.
REFERENCES:
patent: 3906684 (1975-09-01), Marshall et al.
patent: 4504283 (1985-03-01), Charvat
patent: 4588420 (1986-05-01), Charvat
Bell Mark L.
Jolke Ralph E.
Ramron-Bancroft, Inc.
Thompson Willie J.
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