Method of manufacturing abrasive articles
US4497694A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1984 |
| Grant date | Feb 5, 1985 |
| Priority date | — |
| Expiry date | Apr 17, 2004 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC25D7/00
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Abrasive articles, such as finger nail files, are made by stamping a metal sheet to form a blank with a header strip having a plurality of spaced fingers depending therefrom, coating the fingers with a slurry of abrasive granules and flowable plastics material adhesive, curing the coating to anchor the abrasive particles to the fingers, vacuum depositing a thin strike coating of copper or copper alloy over the cured resin coating and then electro depositing a coating of nickel over the vacuum deposited copper. The abrasive granules are preferably aluminum oxide, the resin carrier for the granules is preferably an epoxide thermosetting resin, and the metal coatings are controlled to form thin sheaths around the resin coating leaving the peaks of the abrasive granules exposed or only covered with very thin coatings which break off or wear away when subjected to friction. The cured, abrasive particle containing resin coating is sufficiently stable to resist deterioration during the vacuum coating operation which is carried out in several sequential stages initially releasing gases in the resin coating, then melting the copper, increasing the vacuum and temperature to vaporize the copp…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.