Abrasive finishing elements, tools made from such elements, and methods of making such tools
US5155945A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 29, 1990 |
| Grant date | Oct 20, 1992 |
| Priority date | — |
| Expiry date | Jan 29, 2010 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB24D13/14
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A plastic strip or strap having granular abrasive embedded homogeneously throughout is cut, shaped and formed into a variety of abrasive finishing tools. The plastic working element is preferably rather stiff 6/12 nylon and contains about 30 to 45% by weight of abrasive material. The strip or strap is formed by extrusion of such non-elastomeric plastic through a ceramic die opening and as extruded has an indefinite length in the machine direction, a controlled uniform thickness, and a width which is approximately 5 to 50 times or more the thickness. A preferred width to thickness ratio is about 30:1, or about 1 mm to 3 cm. The strip or strap may be cut to the desired length and partially embossed, serrated or scored either lengthwise or transversely to provide fracture or flex lines. The spacing of the serrations or score lines controls the degree of flexibility or aggressiveness of the tool working face. The use of a fairly wide strip with serrations or scores not only provides an improved tool but greatly facilitates the construction of the tool. The invention includes a variety of tools formed from the abrasive strip or strap and these include radial or flap wheels, both serrate…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.