|Publication number||US3860400 A|
|Publication date||Jan 14, 1975|
|Filing date||Jul 17, 1972|
|Priority date||Jul 27, 1971|
|Also published as||CA962065A, CA962065A1, DE2235503A1, DE2235503C2|
|Publication number||US 3860400 A, US 3860400A, US-A-3860400, US3860400 A, US3860400A|
|Inventors||Prowse Derek Henry George, Prowse Stephen Derek|
|Original Assignee||Prowse Co Ltd D H|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (10), Referenced by (50), Classifications (15)|
|External Links: USPTO, USPTO Assignment, Espacenet|
United States, Patent Prowse et al.
[ Jan. 14, 1975.
FLEXIBLE ABRASIVE COVERINGS Inventors: Derek Henry George Prowse;
Stephen Derek Prowse, both of Batts Hill, Redhill, Surrey, England Assignee: D. H. Prowse and Company Limited,
Surrey, England Filed: July 17, 1972 Appl. No; 272,116
Foreign Application Priority Data References Cited UNITED STATES PATENTS 7/1905 (iorton 5l/DlG. 19
Gorton 5l/DlG. l9 Benner et al. 51/307 Taylor 51/299 Sternfield et al. Sl/295 Robie 51/296 Anthony et al. 51/293 Hoover 51/295 Hurst 5l/293 Mattia et al. 5l/309 Primary ExaminerDonald J. Arnold ABSTRACT Abrasive articles and methods of making same wherein a carrying sheet preferably in the form of a wire mesh or like perforated structure is embedded in a backing member in a manner whereby only spaced portions of the sheet are exposed on one surface of the backing member and abrasive particles are secured only to these exposed portions of the sheet.
18 Claims, 3 Drawing Figures FLEXIBLE ABRASIVE COVERINGS This invention relates to abrasive articles and finds application in diverse fields such as grinding wheels or discs, flexible abrasive coverings or sheets or endless abrasive belts.
One object of the invention is to provide a method and means whereby abrasive particles such as diamond particles can be plated onto a sheet of flexible material for example a sheet of flexible mesh in such a manner that the flexibility of the sheet is substantially unimpaired and so as to produce a flexible abrasive article which can be used to advantage in the surface treatment of irregular surfaces for example in grinding irregular stonework.
The invention provides an abrasive article comprising abrasive carrying material combined with nonabrasive carrying material in a manner whereby spaced portions only of the carrying material are exposed from the non-carrying material on one surface of the article and abrasive particles secured only to said exposed portions of the carrying material.
The invention also provides a method of manufacturing an abrasive article comprising combining abrasive carrying material with non-abrasive carrying material exposing spaced portions only of the carrying material from the non-carrying material on one surface of the article and securing abrasive particles only to said exposed portions of the carrying material.
By securing the abrasive particles only to the exposed portions of the carrying material, control of the distribution of abrasive particles over an area can be obtained. Further, where the carrying material is a flexible mesh or perforated sheet, and the abrasive is in the form of diamond particles to be plated onto the mesh, by exposing only portions of the mesh on one surface of the backing member and plating the diamond particles to these portions only, the plating process does not substantially affect the flexibility of the mesh intersections, so that if a flexible backing member is used, a flexible sheet of diamond plated mesh can be obtained.
The abrasive carrying material which is preferably in sheet form having a discontinuous surface may be flat or bent for example the sheet may be formed into a tube or cylinder which is then combined with backing member material and abrasive to form either a solid cylindrical or a tubular abrasive article respectively. Dependent on the application required the abrasive carrying material may be metallic or non-metallic, flexible or rigid and may be perforated or imperforate, the latter having for example a pattern embossed thereon or being corrugated, to provide a discontinuous surface to facilitate exposure of portions only of the sheet on one face of the non-abrasive carrying material or backing member. Examples of suitable abrasive-carrying materials are metallic or non-metallic mesh or screen structures or perforated or expanded sheets.
The non-abrasive-carrying material may be flexible or non-flexible and may comprise a synthetic plastics or natural material such as rubber or latex. Where the abrasive particles are to be electroplated onto the carrying material, the non-earrying-or backing member material should be non-conducting. Examples of suitable materials for synthetic plastics backing members are polypropylene, acrylic butadiene styrene, styrene acrylic nitride, Delvin (aeetal resin compositions manufactured by DUPONT & CO.), nylon, Surlyn (polymeric resin compositions, ionomers based on ethylene manufactured by DUPONT & CO.), or fibre glass or other resin compositions.
Numerous techniques may be employed for combining the materials so that only portions of the carrying material are exposed on one surface of the noncarrying material. For example, a sheet of carrying material may be embedded in a backing member by extrusion or by pressing the sheet into the backing member, i.e. by vulcanization. The sheet may be coated or sprayed with backing member material or the sheet can be dipped into molten backing member material or simply adhered to the backing member with solvent or adhesive.
The abrasive particles may comprise diamond particles either natural or synthetic, cubic boron nitride, tungsten carbide, glass, sand or any other abrasive or combination thereof or the abrasive particles may comprise conglomerates of abrasive particles impregnated into a carrying medium. To attach the abrasive particles to the exposed portions only of the carrying material it is preferred, particularly in the case of a diamond abrasive which it is envisaged will be the most useful form of abrasive for articles according to the invention, to plate the particles tothe carrying material, by conventional electroplating techniques where a metal carrying sheet is used with a non-conductive backing member or for a non-metallic carrying sheet first by chemically depositing a metal onto the exposed sheet portions followed by an electroplating process for the abrasive particles.
The invention will now be described by way of example with reference to the accompanying drawings all of the Figures of which show cross-sections through different forms of abrasive particles.
FIG. 1 shows carrying material in the form of a sheet of wire mesh 1 embedded in non-carrying material in the form of a backing member 2 of say plastics material in such a manner that only regularly spaced peak portions 3 of the mesh at its intersections are exposed on the upper surface of the backing member. These exposed portions of the mesh are plated with abrasive particles 4. This form of the invention is useful for grinding wheels or as an abrasive covering or belt, if the backing member is flexible.
In the construction shown in FIG. 2, a raspsection perforated sheet 5 is embedded in a backing member 6 so that only those portions of the sheet around the perforations are exposed on the upper surface of the backing member and again, only these exposed portions are plated with abrasive particles 7, eg diamond particles.
FIG. 3 shows a tubular form of abrasive article, such as an abrasive roller or a tubular bead to be threaded for example onto a saw wire, and comprising a tubular backing member 8 with a tube of wire mesh 9 embedded therein so that only portions of the mesh at its intersections are exposed on the outer peripheral surface of the backing member. These exposed portions are again plated with abrasive particles 10. The mesh may be pressed into the backing member or the backing member may be extruded with the mesh.
EXAMPLE I A rigid grinding wheel was made from a body member of acrylic butadiene styrene (ABS) having an abrasive covering constructed in accordance with the invention. To this end, a sheet of mild steel mesh l/l6 inch thick with 14 apertures per linear inch and a wire diameter of 18 thousandth of an inch was embedded in a 1/16 inch thick backing member sheet also of ABS. The embedding process was performed in a press with a heated platen and was carried out until the mesh and backing member surfaces were substantially flush. Then, the backing member with the embedded mesh was adhered with solvent to the wheel body and the operative surface trimmed with a conventional grinding wheel to ensure exposure from the backing member only of spaced portions of the mesh at the mesh intersections. The wheel body, with an electrode attached to the mesh was then admitted to a conventional nickel electroplating bath containing diamond grit particles of 170/200 grit size and the grit particles were thus plated only onto the exposed portions of the mesh.
EXAMPLE II To obtain a flexible abrasive covering material, useful for example as a peripheral covering for a grinding wheel or as a covering for a flexible disc grinder, a metal mesh as outlined in Example I, was embedded in a Ill 6 inch backing sheet of a flexible plastics material in this case polypropylene by the same method used in Example I. The operative surface was again trimmed to ensure correct mesh exposure and the resultant covering material was then treated in an electroplating bath as indicated in Example I to plate diamond gint particles only to the exposed mesh portions. This flexible covering can then be combined with a compressible backing such as a rubber backing or a noncompressible metallic backing to form a grinding wheel.
It will be appreciated that use of the invention allows the distribution of abrasive particles over a required area to be accurately controlled by controlling the points of exposure of the carrying sheet from the backing member, by suitable choice of the sheet configuration and further, where non-abrasive areas are required on an abrasive surface, these can be obtained by conventional masking techniques during the plating process.
Further, whilst in the accompanying drawings, the exposed portions of the abrasive carrying material are, for the sake of clarity, shown as projecting slightly from the surface of the non-carrying material, this is not essential. The exposed portions of the carrying material can be flush with the surface of the non-carrying material or even depressed from said surface. Also, whilst the specification describes articles with abrasive particles on one surface only, it is within the scope of the invention to provide an article with exposed portions of 4. An article as claimed in claim 3 wherein said sheet is perforated.
5. An article as claimed in claim 4 wherein said sheet comprises a mesh structure.
6. An article as claimed in claim 5 wherein said exposed portions include intersecting portions of the mesh structure.
7. An article as claimed in claim 1 wherein said sheet consists of an electrically conducting material.
8. An article as claimed in claim 1 wherein the backing material is flexible.
9. An article as claimed in claim 1 wherein the backing material is non-electrically conducting.
10. An article as claimed in claim 9 wherein the supporting material is a synthetic resinous material.
1 1. An article as claimed in claim 1 wherein the abrasive particles include diamond particles.
12. An article as claimed in claim 1 wherein the abrasive particles are plated onto said exposed portions of the sheet.
13. A method of manufacturing an abrasive article comprising embedding a metallic sheet within a backing material so as to expose spaced portions only of the sheet on a surface of the backing material and bonding abrasive particles to said exposed portions of the sheet. 14. A method as claimed in claim 13 wherein the sheet is pressed into the backing material.
15. A method as claimed in claim 13 wherein the backing material is a synthetic resinous material and shaped by extrusion along with said sheet.
16. A method as claimed in claim 13 wherein the sheet is embedded in said backing material by applying the material in liquid or molten form to the sheet.
17. A method as claimed in claim 13 wherein said surface of the article is machined to expose said portions of the sheet.
18. A method as claimed in claim 14 wherein the abrasive particles are secured, to the sheet by a plating process.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US794495 *||Apr 30, 1902||Jul 11, 1905||George Gorton||Abrading-surface.|
|US794496 *||May 23, 1902||Jul 11, 1905||George Gorton||Abrading-sheet.|
|US2225193 *||Sep 15, 1937||Dec 17, 1940||Carborundum Co||Abrasive wheel|
|US2564217 *||Oct 30, 1948||Aug 14, 1951||Carborundum Co||Abrasive cutoff wheel|
|US2665528 *||Jan 27, 1950||Jan 12, 1954||Block Myron W||Disposable cleansing tissue|
|US2734812 *||Sep 21, 1951||Feb 14, 1956||robie|
|US2906612 *||Aug 7, 1957||Sep 29, 1959||Skil Corp||Cutting apparatus and manufacture thereof|
|US2958593 *||Jan 11, 1960||Nov 1, 1960||Minnesota Mining & Mfg||Low density open non-woven fibrous abrasive article|
|US3246430 *||Apr 25, 1963||Apr 19, 1966||Rexall Drug Chemical||Abrasive articles and methods of making the same|
|US3517464 *||Mar 19, 1968||Jun 30, 1970||Budd Co||Method of making abrasive tools by electro-deposition|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US3921344 *||May 14, 1973||Nov 25, 1975||American Optical Corp||Lens surfacing pads and method of making the same|
|US3964213 *||Mar 17, 1975||Jun 22, 1976||Tobey Alton E||Abrasive cleaning tool|
|US4047902 *||Jun 24, 1976||Sep 13, 1977||Wiand Richard K||Metal-plated abrasive product and method of manufacturing the product|
|US4078906 *||Sep 29, 1976||Mar 14, 1978||Elgin Diamond Products Co., Inc.||Method for making an abrading tool with discontinuous diamond abrading surfaces|
|US4162899 *||Aug 15, 1977||Jul 31, 1979||Swiss Aluminium Ltd.||Polishing foil or polishing plate|
|US4256467 *||Dec 17, 1979||Mar 17, 1981||Ian Gorsuch||A flexible abrasive coated article and method of making it|
|US4826508 *||Sep 10, 1987||May 2, 1989||Diabrasive International, Ltd.||Flexible abrasive coated article and method of making it|
|US4908046 *||Feb 14, 1989||Mar 13, 1990||Wiand Ronald C||Multilayer abrading tool and process|
|US4916869 *||Aug 1, 1988||Apr 17, 1990||L. R. Oliver & Company, Inc.||Bonded abrasive grit structure|
|US4945686 *||Mar 20, 1989||Aug 7, 1990||Wiand Ronald C||Multilayer abrading tool having an irregular abrading surface and process|
|US5022895 *||Oct 18, 1989||Jun 11, 1991||Wiand Ronald C||Multilayer abrading tool and process|
|US5127197 *||Apr 25, 1991||Jul 7, 1992||Brukvoort Wesley J||Abrasive article and processes for producing it|
|US5131924 *||Feb 2, 1990||Jul 21, 1992||Wiand Ronald C||Abrasive sheet and method|
|US5133782 *||Jan 26, 1990||Jul 28, 1992||Wiand Ronald C||Multilayer abrading tool having an irregular abrading surface and process|
|US5203881 *||Aug 29, 1991||Apr 20, 1993||Wiand Ronald C||Abrasive sheet and method|
|US5251802 *||Jun 12, 1992||Oct 12, 1993||Minnesota Mining And Manufacturing Company||Abrasive article and processes for producing it|
|US5316812 *||Dec 20, 1991||May 31, 1994||Minnesota Mining And Manufacturing Company||Coated abrasive backing|
|US5318604 *||Nov 18, 1992||Jun 7, 1994||Minnesota Mining And Manufacturing Company||Abrasive articles incorporating abrasive elements comprising abrasive particles partially embedded in a metal binder|
|US5417726 *||Feb 3, 1994||May 23, 1995||Minnesota Mining And Manufacturing Company||Coated abrasive backing|
|US5573619 *||Oct 29, 1993||Nov 12, 1996||Minnesota Mining And Manufacturing Company||Method of making a coated abrasive belt with an endless, seamless backing|
|US5578096 *||Aug 10, 1995||Nov 26, 1996||Minnesota Mining And Manufacturing Company||Method for making a spliceless coated abrasive belt and the product thereof|
|US5580634 *||Sep 26, 1994||Dec 3, 1996||Minnesota Mining And Manufacturing Company||Coated abrasive backing|
|US5584897 *||Dec 29, 1995||Dec 17, 1996||Minnesota Mining And Manufacturing Company||Method for making an endless coated abrasive article|
|US5609706 *||May 8, 1995||Mar 11, 1997||Minnesota Mining And Manufacturing Company||Method of preparation of a coated abrasive belt with an endless, seamless backing|
|US5620489 *||Jan 31, 1996||Apr 15, 1997||Ultimate Abrasive Systems, L.L.C.||Method for making powder preform and abrasive articles made thereform|
|US5681612 *||Feb 20, 1996||Oct 28, 1997||Minnesota Mining And Manufacturing Company||Coated abrasives and methods of preparation|
|US5725421 *||Feb 27, 1996||Mar 10, 1998||Minnesota Mining And Manufacturing Company||Apparatus for rotative abrading applications|
|US5817204 *||Oct 9, 1996||Oct 6, 1998||Ultimate Abrasive Systems, L.L.C.||Method for making patterned abrasive material|
|US5830248 *||Nov 21, 1996||Nov 3, 1998||Minnesota Mining & Manufacturing Company||Method for making a spliceless coated abrasive belt|
|US5849646 *||Jul 7, 1997||Dec 15, 1998||Minnesota Mining & Manufacturing Company||Coated abrasive backing|
|US5919084 *||Jun 25, 1997||Jul 6, 1999||Diamond Machining Technology, Inc.||Two-sided abrasive tool and method of assembling same|
|US5924917 *||Oct 24, 1997||Jul 20, 1999||Minnesota Mining And Manufacturing Company||Coated abrasives and methods of preparation|
|US5976001 *||Apr 24, 1997||Nov 2, 1999||Diamond Machining Technology, Inc.||Interrupted cut abrasive tool|
|US5980678 *||May 11, 1998||Nov 9, 1999||Ultimate Abrasive Systems, L.L.C.||Patterned abrasive material and method|
|US6066188 *||Jul 16, 1998||May 23, 2000||Minnesota Mining And Manufacturing Company||Coated abrasive belt with an endless seamless backing and method of preparation|
|US6190246 *||Dec 23, 1996||Feb 20, 2001||Brian H. Parrott||Sanding devices and the like for removing materials|
|US6261167||Dec 15, 1998||Jul 17, 2001||Diamond Machining Technology, Inc.||Two-sided abrasive tool and method of assembling same|
|US6402603||Dec 16, 1999||Jun 11, 2002||Diamond Machining Technology, Inc.||Two-sided abrasive tool|
|US6406576||Oct 17, 1996||Jun 18, 2002||3M Innovative Properties Company||Method of making coated abrasive belt with an endless, seamless backing|
|US6406577||Oct 17, 1996||Jun 18, 2002||3M Innovative Properties Company||Method of making abrasive belt with an endless, seamless backing|
|US6528141||Aug 13, 1999||Mar 4, 2003||Diamond Machining Technology, Inc.||Support structure and method of assembling same|
|US6672952||Dec 23, 1998||Jan 6, 2004||3M Innovative Properties Company||Tearable abrasive article|
|US7094140||Jan 25, 2005||Aug 22, 2006||Onfloor Technologies, L.L.C.||Abrasive sanding surface|
|US8357217 *||Jan 22, 2013||Chung-Shan Institute Of Science And Technology||Method and apparatus for making a fixed abrasive wire|
|USB359825 *||May 14, 1973||Jan 28, 1975||Title not available|
|USRE35812 *||Mar 4, 1992||Jun 2, 1998||Oliver; Lloyd R.||Bonded abrasive grit structure|
|EP0439956A2 *||Dec 24, 1990||Aug 7, 1991||Ronald Carlysle Wiand||Abrasive sheet and method of manufacturing|
|WO1991006398A1 *||Nov 7, 1990||May 16, 1991||Barman Jensen Rolf||Grinding belt|
|WO1992012827A1 *||Jan 24, 1992||Aug 6, 1992||Carbide Tools International A/S||Sanding belt|
|WO1997038813A1 *||Apr 18, 1997||Oct 23, 1997||Antler Steven M||Sanding accessory for an oscillating sander|
|U.S. Classification||51/295, 451/538, 51/309, 51/298|
|International Classification||B24D5/06, B24D5/00, B24D7/06, B24D11/00, B24D7/00|
|Cooperative Classification||B24D11/00, B24D7/06, B24D5/06|
|European Classification||B24D11/00, B24D7/06, B24D5/06|