US3785094A - Abrasive medium - Google Patents
Abrasive medium Download PDFInfo
- Publication number
- US3785094A US3785094A US00174655A US3785094DA US3785094A US 3785094 A US3785094 A US 3785094A US 00174655 A US00174655 A US 00174655A US 3785094D A US3785094D A US 3785094DA US 3785094 A US3785094 A US 3785094A
- Authority
- US
- United States
- Prior art keywords
- abrasive
- synthetic resin
- abrasive grains
- tool according
- short fibers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
- B24D7/02—Wheels in one piece
Definitions
- ABSTRACT 1 Foreign Apphcatmn Pnomy Data A flexible grinding tool made up a synthetic resin im- May 11, 1971 Germany 1.
- P 21 23 126.5 pregnated fi gl mat i a ay of abrasive grains attached to both surfaces of the mat by a syn- [52]
- U.S. CI. 51/401, 51/206 NF thetic resin binder Containing Short fibers of glass, [51] [Illbestos ceramicmateria] O1.
- g p therein [58] Field of Search 51/206 NF, 400, 401,
- an abrasive medium consisting of a synthetic resin impregnated fiberglass mat backing to which a layer of abrasive grains is attached by a synthetic resin binder.
- Short fibers of glass, asbestos, ceramic material, graphite, or the like are contained in the impregnating resin and/or in the abrasive grain binder.
- the fiberglass mat consists of individual fiber elements in the form of fiber segments stretched out straight and oriented in all directions.
- abrasive media which are attached to a base
- abrasive media which are attached to a base
- abrasive media which are attached to a base
- the fiberglass mat proposed as the backing material in Ser. No. 1 15,164 filed Feb. 16, 1971 has significant advantages over the backing materials listed above as far as the state of the art is concerned, because it has extremely high heat resistance as well as particularly high flexibility, in addition to being insensitive to climate and moisture.
- such an abrasive material may be used readily in wet grinding. Distortion of the abrasive material due to differential absorption or loss of moisture is excluded.
- there is no-change in mechanical strength under the influence of heat and humidity in contrast to the ordinary backing materials used heretofore.
- short fibers of glass, asbestos, ceramic material, graphite or the like having a length of 0.1 to about 3 mm
- This admixture of short fibers can amount to about 2 to percent by weight based on the resin or binder.
- the short fibers have reinforcement or bridge formation, that has a definitely beneficial effect on the adhesion of the abrasive grains to the binder and the surface of the fiberglass mat. This effect is particularly evident in the'desired higher flexibility of the abrasive. This effect not only gives satisfactory values for resistance to wear, satisfactory abrasion and ability to withstand thermal stress, but also provides a particularly high resistance to wear, shifting, and bending.
- the present invention which is an improvement over the abrasive medium described in application Ser. No. 1 l5,l64 filed Feb. 16, 1971 consists in the following: the fiberglass mat is covered on both sides with a layer of abrasive grains to form a flexible grinding disk suitable for surface grinding as well as for cutting.
- abrasive material according to the invention depending on the type of grain used (corundum or silicon carbide). All metals can be ground or cut, as well as tile, roofing tile, asbestos-cement and slate, and other stones or synthetics can be handled flexibly.
- This tool allows easy and safe removal of rust and all kinds of paint from metal and wood. It has been shown that this tool has a blast resistance of more than 175 m/s, so that particularly high safety is assured.
- the feature by which a fiberglass mat is produced, in which the individual fiber elements are stretched out straight and consist of fiber segments oriented in all directions is also of critical importance for the circular abrasive disk according to the present invention.
- FIG. 1 is a top plan view of a circular abrasive element, partly in cross section;
- FIG. 2 is an enlarged cross sectional view taken along the line 11-" in FIG. 1.
- the backing for the circular abrasive element forming an abrasive disk consists of a fiberglass mat 1 with a glass weight of 200 to about 1000 g/m
- a fiberglass mat with a loose structure of fiber elements 2 and 3 is used, these elements being oriented in all directions as shown in FIG. 1 and made in the form of fiber segments stretched out straight.
- the individual fiber elements consist of fiber segments 50 to mm long. These fiber segments can be in the form of clustered or individual fiber segments.
- the abrasive grains 4,4a are made of corundum, silicon carbide or the like. They are anchored to the fiberglass mat 1 by an ordinary synthetic resin binder. As also shown in FIG. 2, these abrasive grains 4,4a penetrate the loose structure of the fiberglass mat l, which is saturated in turn by a synthetic resin. The abrasive grains 4,4a are soaked with a resin coating before being placed on the base, thus insuring a positive anchoring on the base and an inner bond with the impregnating resin in the fiberglass mat.
- Short fibers 5 are added to the synthetic resin for impregnating the fiberglass mat 1 and/or the synthetic resin binder for the abrasive grains 4,4a which is applied to both sides of fiberglass mat 1; these short fibers are shown as dots in FIG. 2, while the synthetic resin or layer of synthetic resin binder is labeled 6.
- the short fibers 5 have a length of about 0.1 to 3 mm; a diameter of about 0.003 0.0012 mm and their amount by weight is 2 to 20 percent based on the weight of the solid synthetic resin or synthetic resin binder used.
- the binders used may be based on epoxy, polyester, melamine, or preferably on phenolic resin and specially elasticized.
- short glass fibers may also be combined with powdered fillers such as marble dust (CaCO cryolite (Na (AlF pyrite (FeS iron oxide (FeO, Fe2O and the like.
- powdered fillers such as marble dust (CaCO cryolite (Na (AlF pyrite (FeS iron oxide (FeO, Fe2O and the like.
- CaCO cryolite Na (AlF pyrite (FeS iron oxide (FeO, Fe2O and the like.
- FeS iron oxide FeO, Fe2O and the like.
- the mechanical agd thermal properties of the abrasive medium can be influenced within broad limits by these fillers.
- Combination tools are known which are also recommended for simultaneous usability in surface grinding and cutting. These known tools also have a woven fabric fiberglass disc as a backing.
- the geometric structure of every woven fabric fiberglass disc shows a directional orientation of its strength, with the highest tensile strength values found for a stress in the direction of the warp or woof and definitely reduced values, e.g., at an angle of 45 to the direction of the warp or woof. This is a disadvantage in rotating tools.
- the edge strength in cutting using a fiberglass disk as a backing is definitely limited. Uniform wear of the outer edge of the disk can be achieved only with difficulty under these conditions.
- Vulcanized fiber grinding disks are also known, which are coated on both sides with abrasive grains. These abrasives can admittedly be used on both sides for surface grinding, but not for cutting.
- the sheetform vulcanized fiber material does not allow any penetration of abrasive grains, however, so that the circumferential grinding required for cutting is impossible.
- the short fibers are preferably glass fibers, and good results are obtained when the short glass fibers as well as the fiberglass elementary fibers of the mat, as well as the abrasive grains were treated with adhesive agents which consist mainly of monomer silicon compounds generally known in the trade as Silans. This Silan treatment also considerably increases the resistance of the abrasive medium to the effect of moisture, which is especially important in wet grinding.
- ceramic material as used in the present claims is intended to be generic to glass.
- a flexible grinding tool comprising:
- each said layer being attached to said mat by a synthetic resin binder
- said synthetic resin binder contains fibers of asbestos, ceramic material or graphite therein, said fibers being of a length of about 0.1 to approximately 3 mm.
- a tool according to claim 1 wherein said synthetic resin impregnating said fiberglass mat contains short fibers of asbestos, ceramic material or graphite therein, said short fibers having a length of about 0.1 to approximately 3 mm.
- a tool according to claim 1 wherein said abrasive grains are corundum or silicon carbide.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Polishing Bodies And Polishing Tools (AREA)
- Laminated Bodies (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712123126 DE2123126A1 (de) | 1971-05-11 | 1971-05-11 | Schleifmittel auf Unterlage |
Publications (1)
Publication Number | Publication Date |
---|---|
US3785094A true US3785094A (en) | 1974-01-15 |
Family
ID=5807428
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US00174655A Expired - Lifetime US3785094A (en) | 1971-05-11 | 1971-08-25 | Abrasive medium |
Country Status (8)
Country | Link |
---|---|
US (1) | US3785094A (de) |
CH (1) | CH558236A (de) |
DE (1) | DE2123126A1 (de) |
ES (1) | ES207685Y (de) |
FR (1) | FR2137407B2 (de) |
GB (1) | GB1310649A (de) |
IT (1) | IT997022B (de) |
NL (1) | NL7110302A (de) |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4459987A (en) * | 1982-03-10 | 1984-07-17 | William W. Haefliger | Flexible abrasive pad |
US4712552A (en) * | 1982-03-10 | 1987-12-15 | William W. Haefliger | Cushioned abrasive composite |
US5384988A (en) * | 1993-02-05 | 1995-01-31 | Practical Systems, Inc. | Lens surfacing assembly |
US5580634A (en) * | 1991-12-20 | 1996-12-03 | Minnesota Mining And Manufacturing Company | Coated abrasive backing |
US5605499A (en) * | 1994-04-27 | 1997-02-25 | Speedfam Company Limited | Flattening method and flattening apparatus of a semiconductor device |
US20040082290A1 (en) * | 2002-10-24 | 2004-04-29 | Noritake Co., Limited | Grinding wheel having core body coated with impermeable coating |
US6813974B2 (en) | 2001-06-18 | 2004-11-09 | Mccabe Benjamin | Filter grip |
FR2882953A1 (fr) * | 2005-03-14 | 2006-09-15 | M B H Dev Sarl | Disque abrasif pour poncage et meulage |
US20080102720A1 (en) * | 2006-10-30 | 2008-05-01 | 3M Innovative Properties Company | Abrasive article and method of making and using the same |
US20080152856A1 (en) * | 2006-12-20 | 2008-06-26 | 3M Innovative Properties Company | Coated abrasive disc and method of making the same |
USD873517S1 (en) * | 2017-07-21 | 2020-01-21 | 3M Innovative Properties Company | Floor scrubbing pad |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2284716A (en) * | 1941-01-22 | 1942-06-02 | Carborundum Co | Manufacture of abrasive articles |
US2334572A (en) * | 1941-12-29 | 1943-11-16 | Carborundum Co | Manufacture of abrasive materials |
US2768483A (en) * | 1953-01-19 | 1956-10-30 | Rexall Drug Company | Abrasive article and method of making |
US2880080A (en) * | 1955-11-07 | 1959-03-31 | Minnesota Mining & Mfg | Reinforced abrasive articles and intermediate products |
US3529945A (en) * | 1959-08-18 | 1970-09-22 | Sherwin Williams Co | Rotary brushing tool containing nonwoven fibrous material |
-
1971
- 1971-05-11 DE DE19712123126 patent/DE2123126A1/de active Pending
- 1971-07-13 CH CH1029071A patent/CH558236A/de not_active IP Right Cessation
- 1971-07-15 GB GB3331571A patent/GB1310649A/en not_active Expired
- 1971-07-16 ES ES1971207685U patent/ES207685Y/es not_active Expired
- 1971-07-19 IT IT7446/71A patent/IT997022B/it active
- 1971-07-27 NL NL7110302A patent/NL7110302A/xx unknown
- 1971-08-25 US US00174655A patent/US3785094A/en not_active Expired - Lifetime
- 1971-09-09 FR FR717132576A patent/FR2137407B2/fr not_active Expired
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2284716A (en) * | 1941-01-22 | 1942-06-02 | Carborundum Co | Manufacture of abrasive articles |
US2334572A (en) * | 1941-12-29 | 1943-11-16 | Carborundum Co | Manufacture of abrasive materials |
US2768483A (en) * | 1953-01-19 | 1956-10-30 | Rexall Drug Company | Abrasive article and method of making |
US2880080A (en) * | 1955-11-07 | 1959-03-31 | Minnesota Mining & Mfg | Reinforced abrasive articles and intermediate products |
US3529945A (en) * | 1959-08-18 | 1970-09-22 | Sherwin Williams Co | Rotary brushing tool containing nonwoven fibrous material |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4712552A (en) * | 1982-03-10 | 1987-12-15 | William W. Haefliger | Cushioned abrasive composite |
US4459987A (en) * | 1982-03-10 | 1984-07-17 | William W. Haefliger | Flexible abrasive pad |
US5580634A (en) * | 1991-12-20 | 1996-12-03 | Minnesota Mining And Manufacturing Company | Coated abrasive backing |
US5849646A (en) * | 1991-12-20 | 1998-12-15 | Minnesota Mining & Manufacturing Company | Coated abrasive backing |
US5384988A (en) * | 1993-02-05 | 1995-01-31 | Practical Systems, Inc. | Lens surfacing assembly |
US5605499A (en) * | 1994-04-27 | 1997-02-25 | Speedfam Company Limited | Flattening method and flattening apparatus of a semiconductor device |
US6813974B2 (en) | 2001-06-18 | 2004-11-09 | Mccabe Benjamin | Filter grip |
US20040082290A1 (en) * | 2002-10-24 | 2004-04-29 | Noritake Co., Limited | Grinding wheel having core body coated with impermeable coating |
US7063608B2 (en) * | 2002-10-24 | 2006-06-20 | Noritake Co., Limited | Grinding wheel having core body coated with impermeable coating |
FR2882953A1 (fr) * | 2005-03-14 | 2006-09-15 | M B H Dev Sarl | Disque abrasif pour poncage et meulage |
EP1702718A1 (de) * | 2005-03-14 | 2006-09-20 | M.B.H. Developpement | Schleifscheibe |
US20080102720A1 (en) * | 2006-10-30 | 2008-05-01 | 3M Innovative Properties Company | Abrasive article and method of making and using the same |
US20080152856A1 (en) * | 2006-12-20 | 2008-06-26 | 3M Innovative Properties Company | Coated abrasive disc and method of making the same |
US8066786B2 (en) | 2006-12-20 | 2011-11-29 | 3M Innovative Properties Company | Coated abrasive disc and method of making the same |
USD873517S1 (en) * | 2017-07-21 | 2020-01-21 | 3M Innovative Properties Company | Floor scrubbing pad |
Also Published As
Publication number | Publication date |
---|---|
ES207685Y (es) | 1976-07-16 |
NL7110302A (de) | 1972-11-14 |
FR2137407A2 (de) | 1972-12-29 |
GB1310649A (en) | 1973-03-21 |
DE2123126A1 (de) | 1972-11-23 |
CH558236A (de) | 1975-01-31 |
ES207685U (es) | 1976-03-16 |
IT997022B (it) | 1975-12-30 |
FR2137407B2 (de) | 1973-05-25 |
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