Abrading – Abrading process
Patent
1997-09-03
1999-11-02
Eley, Timothy V.
Abrading
Abrading process
451527, 451550, 72110, 72240, 264145, B24B 100, B24D 1100
Patent
active
059759879
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD
The present invention relates to a method and apparatus for knurling a workpiece, a production tool molded with the knurled workpiece, and a method and apparatus for making an abrasive article with the production tool.
BACKGROUND OF THE INVENTION
The present invention is useful for making an abrasive article in which a structured abrasive coating is provided on a substrate. The abrasive coating comprises abrasive particles and a binder in the form of a precise, three dimensional abrasive composites molded onto the substrate.
A structured abrasive is a form of an abrasive article in which a substrate bears on a major surface thereof abrasive composites comprising a plurality of abrasive grains dispersed in a binder. The binder serves as a medium for dispersing the abrasive grains, and it may also bind the abrasive composites to the substrate. The abrasive composites have a predetermined three-dimensional shape, e.g., pyramidal. In one form, the dimensions of a given composite shape can be made substantially uniform and the composites can be disposed in a predetermined array. The predetermined array can be in linear form or matrix form.
Such a structured abrasive article can be prepared by a method generally as follows. A slurry containing a mixture of a binder precursor and a plurality of abrasive grains is applied onto a production tool having cavities which are the negative of the final shape of the abrasive composites. A substrate is brought into contact with the exposed surface of the production tool such that the slurry wets the first major surface of the substrate to form an intermediate article. Then, the binder is at least partially solidified, cured, or gelled before the intermediate article departs from the exposed surface of the production tool to form a structured abrasive article. The abrasive article is then removed from the production tool and fully cured if it was not fully cured in the previous step. Alternatively, the slurry can be applied onto the first major surface of the substrate and then the production tool can be brought into contact with the first major surface of the substrate. The precise nature of the abrasive composites provides an abrasive article that has a high level of consistency. This consistency further results in excellent performance.
Structured abrasives, and methods and apparatuses for making such structured abrasives, are described in U.S. Pat. No. 5,152,917, "Structured Abrasive Article," (Pieper et al.), issued Oct. 6, 1992, the entire disclosure of which is incorporated herein by reference. In one embodiment, Pieper et al. teaches an abrasive article comprising precisely shaped abrasive composites bonded to a backing in which the composites comprise abrasive particles and a binder. Pieper et al. teaches, among other things, a method of making the structured abrasive article generally in accordance with the method described briefly above. Pieper et al. teaches that the production tool can be a belt, a sheet, a coating roll, a sleeve mounted on a coating roll, or a die, and that the preferred production tool is a coating roll. Pieper et al. teaches that, in some instances, a plastic production tool can be replicated from an original tool by embossing a thermoplastic resin onto a metal tool, for example. Such a metal tool can be fabricated by diamond turning, engraving, hobbing, assembling as a bundle a plurality of metal parts machined in the desired configuration, or other mechanical means, or by electroforming.
Other examples of structured abrasives and methods and apparatuses for their manufacture are disclosed in U.S. Pat. No. 5,435,816, "Method of Making an Abrasive Article," (Spurgeon et al.), issued Jul. 25, 1995, the entire disclosure of which is incorporated herein by reference. In one embodiment, Spurgeon et al. teaches a method of making an abrasive article comprising precisely spaced and oriented abrasive composites bonded to a backing sheet generally in accordance with the method described briefly above. Spurgeon et al. teaches that
REFERENCES:
patent: 1151829 (1915-08-01), Schliker
patent: 1414668 (1922-05-01), Reed
patent: 1949512 (1934-03-01), Norton
patent: 1988065 (1935-01-01), Wooddell
patent: 1989651 (1935-01-01), Drummond
patent: 2245654 (1941-06-01), Drader et al.
patent: 2378261 (1945-06-01), Turney
patent: 2546058 (1951-03-01), Boulet
patent: 2579611 (1951-12-01), Poorman
patent: 2684604 (1954-07-01), Froberg, Jr.
patent: 2870661 (1959-01-01), Poorman
patent: 2870662 (1959-01-01), Poorman
patent: 3017697 (1962-01-01), Wlodek
patent: 3055240 (1962-09-01), Patzman et al.
patent: 3133344 (1964-05-01), Keasler
patent: 3689346 (1972-09-01), Rowland
patent: 3765208 (1973-10-01), Cozert, Jr.
patent: 3924430 (1975-12-01), Plevyak
patent: 3972212 (1976-08-01), Brinkman
patent: 4030331 (1977-06-01), Keasling
patent: 4085553 (1978-04-01), Prunier
patent: 4114415 (1978-09-01), Vodopyanov et al.
patent: 4257250 (1981-03-01), Vanderhorst et al.
patent: 4576850 (1986-03-01), Mertens
patent: 4584861 (1986-04-01), Bartilson et al.
patent: 4706529 (1987-11-01), Hawle
patent: 5015266 (1991-05-01), Yamamoto
patent: 5046226 (1991-09-01), Che
patent: 5152917 (1992-10-01), Pieper et al.
patent: 5156863 (1992-10-01), Pricone et al.
patent: 5197317 (1993-03-01), Della Torre
patent: 5435816 (1995-07-01), Spurgeon et al.
patent: 5437754 (1995-08-01), Calhoun
patent: 5453312 (1995-09-01), Haas et al.
patent: 5489235 (1996-02-01), Gagliardi et al.
patent: 5581989 (1996-12-01), Mann et al.
patent: 5658184 (1997-08-01), Hoopman et al.
patent: 5670188 (1997-09-01), May et al.
patent: 5681217 (1997-10-01), Hoopman et al.
Catalog No. 3, Eaglerock Technologies, published by Eaglerock Technologies International Corp., B-13, 15 Merry Lane, P.O. Box 332, East Hanover, New Jersey 07936 USA.
"How The Surface Relief Of Abrasive Belts Affects Efficiency In Grinding Jobs" from Soviet Engineering Research vol. 9, No. 6 (1989) New York, pp. 103-106 Search Report.
Collins Stanley B.
Hoopman Timothy L.
Servatius James A.
3M Innovative Properties Company
Eley Timothy V.
Trussell James J.
LandOfFree
Method and apparatus for knurling a workpiece, method of molding does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for knurling a workpiece, method of molding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for knurling a workpiece, method of molding will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2127526