EP1827762A1 - Abrasive product and method for the production thereof - Google Patents
Abrasive product and method for the production thereofInfo
- Publication number
- EP1827762A1 EP1827762A1 EP05809970A EP05809970A EP1827762A1 EP 1827762 A1 EP1827762 A1 EP 1827762A1 EP 05809970 A EP05809970 A EP 05809970A EP 05809970 A EP05809970 A EP 05809970A EP 1827762 A1 EP1827762 A1 EP 1827762A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- matrix
- abrasive
- binder
- abrasive according
- abrasive grains
- 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.)
- Granted
Links
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
- B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
- B24D11/001—Manufacture of flexible abrasive materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
- B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
- B24D3/001—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as supporting member
Definitions
- the invention generally relates to an abrasive in which abrasive grains are embedded in a matrix of a binder, and in which an abrasive grain-filled contact surface is formed to grind a workpiece.
- the invention further relates specifically to abrasives with cell-free, in particular unfoamed, binder in the already mentioned contrast to cellular, especially foamed, binder.
- the cell-free PU disintegrate in a particularly important for the invention grouping:
- thermoplastic elastomers thermoplastic elastomers
- the elastically yielding compact bodies mentioned in the introduction to the state of the art or "solid" in the grouping mentioned are in particular cast elastomers.
- the abrasives according to the invention also use cast elastomers in particular.
- binders made as foam a distinction is made between foams produced physically or mechanically by air introduction and foams produced "chemically” using blowing agents.
- the cell-free binder abrasives to which the invention relates are distinguished in that they are neither physically nor chemically foamed by appropriate concrete process control.
- the objective is rather to avoid foaming within the maximum possible range.
- remaining cell formations can not be completely avoided. Therefore, in any case, in describing the particular marketable abrasive product, the reference to actual and theoretical densities appears to be the most appropriate in practice.
- foaming binders For foaming binders, the conditions can best be illustrated by the example of PUR. According to "Saechtling plastic paperback, 28th edition, by Karl Oberbach, Hansa, p 554ff, one can between foam (30 - 300kg / m 3 ), rigid foams (30 - 90kg / m 3 ), and open-celled foams (20 - 20. 40kg / m 3 ).
- the PUR is used massively, in particular with a density of not less than 800 kg / m 3 , which adequately describes the minimum porosity.
- coated abrasives in which the abrasive article has a cellular and in particular foamed binder are known, for example, from DE 31 14 001 A1 and DE 19 07 983 A1.
- the invention relates specifically to abrasives whose abrasive article has a thermosetting binder of the abrasive grains.
- the invention refers back to itself as binders of abrasive grains of abrasive articles per se known thermosets, such as those made of polyurethane.
- rubber can be used in the context of the invention as a binder of the abrasive grains.
- thermoplastic binder of the abrasive grains in the form of a plasticized Kolloxylins shows the other hand, the DD 106 585 A, which in contrast to the thermosets used in the invention additionally the use of a plasticizer or "plasticizer" with about the same proportion (1: 1 or 0.8: 1).
- a level of at least 60 weight percent of the abrasive powder in the abrasive article is required, incidentally a proportion of more than 80 percent of the abrasive powder is believed to adversely affect adhesion of the abrasive article.
- This known abrasive article is specially designed for the formation of the abrasive article as an extremely thin layer of abrasive with a thickness of the layer, measured perpendicular to the base, in the range of 10 microns to a maximum of 40 microns.
- a rather exotic known abrasive is mentioned, whose binder is kneadable for the abrasive grains and thus to adapt to predetermined profiles of a workpiece surface to be ground (DD 255 903 Al).
- endless abrasive belts have been considered to support an endless belt having strip-shaped abrasive bodies as a base, the matrix containing the abrasive grains being each formed by a flexible polyurethane foam, these abrasive bodies being individually applied to the endless belt by means of a separate belt Adhesive were attached (see GB-B 821929, especially page 2 lines 3 to 7).
- this idea requires a production effort disproportionate for mass production by cutting the abrasive body and their separate bonding and has therefore found no input into practice.
- abrasive grains whose grain size is selected according to the desired result directly to a base by means of an inelastic binder such as skin glue and now synthetic resin.
- This base absorbs tensile and centrifugal forces generated on the machine side.
- the abrasive grains are fixed only one layer on the substrate and each protrude with protruding sections from the grinding with the workpiece in grinding engagement passing contact surface. As soon as the protruding sections have worn out in the grinding operation so far that the binder comes into frictional contact with the workpiece, the efficiency of grinding decreases significantly and there is undesirable smearing of the binder on the ground surface of the workpiece.
- the matrix is divided into a plurality of spaced matrix bodies which increase toward the backing in the direction from the respective free contact surface with the workpiece Cross-section parallel to the base have (DE-T2 69210221).
- the invention has for its object to provide an abrasive referred to in the preamble of claim 1, which is suitable as a mass-produced or mass-produced rational mass production or mass production for use as a "finishing" tool on modern grinding machines and a long service life united with high consistent "finishing" quality.
- a contact surface filled with abrasive grains is already provided in the new state, which possibly has to be exposed in the last phase of the production process by detaching a covering binder skin of the binder of the matrix.
- protrude from the thus obtained original first contact surface with the workpiece still sections of the abrasive grains.
- these protruding portions of the abrasive grains are wholly or substantially pressed into the matrix, substantially eliminating abrasive erosion on the workpiece.
- the support ensures the same quality of work regardless of the degree of use of the matrix even with the high operating parameters such as speed, belt speed or characteristic values of an oscillation.
- the preparation of the abrasive according to the invention can be made rationally and inexpensively in a few steps.
- the abrasion is essentially determined by the choice of the binder, the optionally added fillers and the grain type of the abrasive grains.
- the binder can be adjusted specifically.
- the invented The abrasive according to the invention is particularly effective in the "finishing" of relatively rough workpiece surfaces. These can be leveled to extremely fine and defect-free surfaces even if the abrasive grains in the abrasive according to the invention are relatively coarse.
- the claims 2 to 43 relate to advantageous developments of the abrasive according to the invention and the claims 44 to 49 preferred manufacturing device of the abrasive according to the invention.
- an abrasive article whose elastically yielding matrix comprises a cell-free thermosetting binder, directly, ie without the intervention of a separate adhesive layer, applied to a flexible pad to form an integral body, wherein in use of the abrasive continuously abraded abrasive grains can be replaced out of the depth of the matrix and this can be continued until complete or near exhaustion of the abrasive article to the flexible backing without loss of abrasive quality.
- the elastic-resilient training of Grinding matrix and abrasive grains can give the entire abrasive in conjunction with the flexibility of the pad its own flexibility that can be selected adapted to the application.
- the same abrasive can be made available to the consumer irrespective of whether or not the latter must be flexible during sanding. As a result, it is unnecessary in many applications, for such in the need for flexibility of the abrasive different applications to keep several abrasives in stock in stock.
- Claims 2 and 3 relate to preferred upper and lower limits of the density of the binder in the matrix or the abrasive body.
- the claims 4 to 8 relate to preferred selection criteria with respect to the elastic-resilient design of the matrix in terms of elasticity (claims 4 and 5), hardness (claims 6 and 7) and elongation at break (claim 8).
- the claims 10 and 11 relate to preferred dimensions of the thickness of the matrix perpendicular to the substrate in terms of minimum thickness (claim 10) and maximum strength (claim 11).
- Presently preferred for use strengths are 1000 microns, ie 1.0 mm, and 1500 microns, ie 1.5 mm.
- a particularly noteworthy application of the invention is in this sense the production of the abrasive as a flat material, in particular as a web.
- Claims 12 and 13 relate to preferred measures of the ratio of the volume fractions of the abrasive grains and the binder of the matrix with a lower limit (claim 12) and an upper limit (claim 13).
- Claim 14 indicates preferred grain size ranges of the abrasive grains.
- Claim 15 indicates preferred size ranges of the Shore hardness of the abrasive.
- Claims 16 to 20 relate to preferred materials for the cell-free thermosetting binder. This may be filled according to industry standard manner according to claim 21, to which specify the claims 22 and 23 specific recipes.
- Claim 24 relates to a special formulation in the event that the binder can foam in the nature of what should be avoided as much as possible within the scope of the invention.
- Claim 24 provides for the use of specifically a foam inhibitor as an additive to the binder.
- Claims 25 and 27 relate to preferred choices of the type of abrasive grains.
- Claims 28 to 30 relate to preferred arrangements of the abrasive grains in the matrix.
- Claims 31 to 34 relate to preferred subdivisions of the matrix into individual matrix bodies.
- Claims 35 to 38 relate to preferred designs of the pad.
- the claims 39 to 42 relate to preferred geometric shapes of the abrasive for different grinding tools.
- Claim 43 finally relates to a preferred embodiment of the original contact surface of the abrasive in its marketable training prior to its use on the workpiece to be sanded.
- the variant according to claim 39 with formation of the abrasive according to the invention as an endless belt.
- the action on the workpiece in the same abrasive can also be varied by the location of the endless belt, the action on the workpiece.
- Particularly noteworthy are the places of action on the one hand on a contact wheel and on the other hand on a free strand of the endless belt. Also the hardness of the contact wheel and the Belt speed can serve as meaningful parameters.
- the invention also relates to processes for the preparation of the abrasive according to the invention, cf. Claims 44 to 49.
- Fig. 1 shows the contact surface of the abrasive in partial view
- Fig. 2 is an enlarged partial view of Fig. 1 corresponding to the white circle shown in Fig. 1 and Fig. 3 in a further enlargement, the representation of a cross-sectional portion of the same abrasive perpendicular to the contact surface.
- a flexible supporting pad 2 is provided with a matrix 4 (shown in phantom in Fig. 3) consisting of an elastically compliant and cell-free thermosetting binder 6, e.g. from non-foamed polyurethane, as well as fillers and additives, glued, wherein in the matrix 4 in homogeneous distribution or parallel to the pad 2 layers of abrasive grains 8 are incorporated.
- the binder 6 serves not only to bond the abrasive grains S in the matrix 4, but at the same time the matrix 4 with the pad 2, and thus makes a separate adhesive layer between matrix 4 and pad 2 unnecessary.
- a free contact surface 10 is formed parallel to the base 2.
- the contact surface 10 protrude when the abrasive is out of operation, free burrs of the abrasive grains 8 under the restoring force of the elastically resilient binder 6 something out, which is not shown in the drawing.
- the abrasive grains in the region of the free contact surface 10 in interaction with a workpiece, not shown, and pressed against the restoring force of the elastically resilient binder 6 wholly or substantially entirely in the matrix 4.
- abrasive grains 8 project out of the contact surface only to the extent that, together with the binder 6 of the matrix 4, a microstructure is formed on the contact surface 10.
- the illustrated special embodiment still has the following special feature:
- the matrix 4 is subdivided into a plurality of regularly hexagonal matrix bodies 4a whose boundary surfaces run on the hexagonal outline perpendicular to the base 2, so that regardless of the degree of wear of the matrix 4, the same regularly hexagonal cross section of the respective matrix body 4a to the respective base 2 or remains parallel to the contact surface 10.
- the matrix bodies 4a rise in each case individually from the base 2. In each case a uniformly dimensioned continuous light gap 12 remains between them, which starts from the base 2 and extends into the area of the contact surface 10.
- the clear gaps 12 can be used for air or liquid cooling of the workpiece, not shown.
- the matrix bodies 4a form a uniform honeycomb structure of the matrix 4.
- the grinding direction 16 is selected so that it extends on the imaginary connecting line of two opposite corners of a matrix body 4a. These are in turn staggered with respect to each other, so that even if a matrix body 4a is destabilized, mutual support is provided on an adjacent non-destabilized matrix body 4a.
- the stainless steel tubes are first placed on a centerless Sanding machine pre-sanded with a grinding belt grain size P80.
- an endless belt according to the invention was used with the following characteristics: flexible cotton carrier about 320 g / m 2 as support, polyurethane as cell-free thermosetting binder with a layer thickness of 1200 ⁇ m, abrasive grain silicon carbide P ⁇ O in homogeneous distribution in the binder.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Polishing Bodies And Polishing Tools (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102004058710 | 2004-12-06 | ||
PCT/EP2005/012637 WO2006061112A1 (en) | 2004-12-06 | 2005-11-25 | Abrasive product and method for the production thereof |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1827762A1 true EP1827762A1 (en) | 2007-09-05 |
EP1827762B1 EP1827762B1 (en) | 2013-09-11 |
Family
ID=35929652
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP05809970.6A Not-in-force EP1827762B1 (en) | 2004-12-06 | 2005-11-25 | Abrasive product and method for the production thereof |
Country Status (7)
Country | Link |
---|---|
US (1) | US20090277098A1 (en) |
EP (1) | EP1827762B1 (en) |
JP (1) | JP4996475B2 (en) |
KR (1) | KR101287501B1 (en) |
CN (1) | CN101048259B (en) |
BR (1) | BRPI0518815A2 (en) |
WO (1) | WO2006061112A1 (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9492001B2 (en) * | 2011-11-01 | 2016-11-15 | Derma Dream Group Ltd. | System and method for treating a surface |
PL2895298T3 (en) * | 2012-09-05 | 2022-03-07 | Mirka Oy | Flexible grinding product with flattened surface and method for manufacturing the same |
CN105209179A (en) * | 2013-05-17 | 2015-12-30 | 3M创新有限公司 | Easy-clean surface and method of making the same |
DE102013112296A1 (en) * | 2013-11-08 | 2015-05-13 | Klingspor Ag | abrasive |
EP3348355A1 (en) * | 2017-01-16 | 2018-07-18 | Klingspor AG | Grinding body, in particular graining body |
TWI656000B (en) * | 2018-03-27 | 2019-04-11 | 中國砂輪企業股份有限公司 | Grinding tool |
CN109227417A (en) * | 2018-10-31 | 2019-01-18 | 张家港智慧清洁技术研究院有限公司 | A kind of electroplated diamond abrasive band and preparation method thereof |
CN110421492B (en) * | 2019-06-12 | 2021-05-18 | 江苏君睿智能制造有限公司 | Wear-resistant scrubbing sheet for cleaning cold-rolled section steel |
Family Cites Families (27)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2825638A (en) * | 1955-07-27 | 1958-03-04 | Us Rubber Co | Grinding wheel manufacture |
DD106585A1 (en) | 1973-04-06 | 1974-06-20 | ||
US4255164A (en) * | 1979-04-30 | 1981-03-10 | Minnesota Mining And Manufacturing Company | Fining sheet and method of making and using the same |
DE2918103C2 (en) * | 1979-05-04 | 1985-12-05 | Sia Schweizer Schmirgel- & Schleifindustrie Ag, Frauenfeld | Method for applying a base binder and apparatus for carrying out the same |
US4504283A (en) * | 1982-07-22 | 1985-03-12 | Superior Finishers, Incorporated | Cushioned abrasive articles, and method of manufacture |
JPS59161270A (en) * | 1983-03-01 | 1984-09-12 | Sanwa Kenma Kogyo Kk | Production method for polyurethane grindstone |
JPH0773828B2 (en) * | 1985-07-19 | 1995-08-09 | トヨタ自動車株式会社 | Honing wheel for aluminum alloy and its manufacturing method |
JPH0518055Y2 (en) * | 1986-05-09 | 1993-05-13 | ||
JPS645775A (en) * | 1987-06-30 | 1989-01-10 | Tokin Corp | Surface polishing tape for magnetic recording medium |
JPH01121656U (en) * | 1988-02-09 | 1989-08-17 | ||
JPH03256676A (en) * | 1990-03-05 | 1991-11-15 | Romatetsuku Kk | Polishing cloth |
US5380390B1 (en) * | 1991-06-10 | 1996-10-01 | Ultimate Abras Systems Inc | Patterned abrasive material and method |
AU654901B2 (en) * | 1992-03-16 | 1994-11-24 | De Beers Industrial Diamond Division (Proprietary) Limited | Polishing pad |
DE4328345A1 (en) * | 1992-10-28 | 1994-05-05 | Ruetgerswerke Ag | Duroplastic mixts. for moulded or abrasive articles |
TW383322B (en) * | 1994-11-02 | 2000-03-01 | Norton Co | An improved method for preparing mixtures for abrasive articles |
TW394723B (en) * | 1997-04-04 | 2000-06-21 | Sung Chien Min | Abrasive tools with patterned grit distribution and method of manufacture |
JP4195942B2 (en) * | 1998-02-20 | 2008-12-17 | 宏一 西村 | Abrasive |
JP2000017252A (en) * | 1998-06-29 | 2000-01-18 | Dainippon Ink & Chem Inc | Abrasive material composition and abrasive material thereof |
DE19951250A1 (en) * | 1999-10-25 | 2001-05-03 | Treibacher Schleifmittel Gmbh | Abrasive grain with an active coating |
JP2001181507A (en) * | 1999-12-28 | 2001-07-03 | Dow Corning Toray Silicone Co Ltd | Abrasive-forming silicone rubber composition |
JP2002172563A (en) * | 2000-11-24 | 2002-06-18 | Three M Innovative Properties Co | Abrasive tape |
JP2004031674A (en) * | 2002-06-26 | 2004-01-29 | Disco Abrasive Syst Ltd | Contamination removing apparatus |
JP3737787B2 (en) * | 2002-07-16 | 2006-01-25 | 株式会社東芝 | Manufacturing method of semiconductor device |
GB0225913D0 (en) * | 2002-11-06 | 2002-12-11 | 3M Innovative Properties Co | Abrasive articles |
JP2004235445A (en) * | 2003-01-30 | 2004-08-19 | Toyobo Co Ltd | Polishing pad |
JP2005007520A (en) * | 2003-06-19 | 2005-01-13 | Nihon Micro Coating Co Ltd | Abrasive pad, manufacturing method thereof, and grinding method thereof |
CN101056741B (en) * | 2004-11-19 | 2010-12-08 | 丰田万磨株式会社 | Grinding wheel |
-
2005
- 2005-11-25 US US11/720,642 patent/US20090277098A1/en not_active Abandoned
- 2005-11-25 CN CN2005800366089A patent/CN101048259B/en not_active Expired - Fee Related
- 2005-11-25 EP EP05809970.6A patent/EP1827762B1/en not_active Not-in-force
- 2005-11-25 WO PCT/EP2005/012637 patent/WO2006061112A1/en active Application Filing
- 2005-11-25 KR KR1020077012751A patent/KR101287501B1/en not_active IP Right Cessation
- 2005-11-25 BR BRPI0518815-6A patent/BRPI0518815A2/en not_active IP Right Cessation
- 2005-11-25 JP JP2007543749A patent/JP4996475B2/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2006061112A1 * |
Also Published As
Publication number | Publication date |
---|---|
CN101048259B (en) | 2013-03-13 |
WO2006061112A1 (en) | 2006-06-15 |
JP4996475B2 (en) | 2012-08-08 |
KR20070085816A (en) | 2007-08-27 |
BRPI0518815A2 (en) | 2008-12-09 |
JP2008522837A (en) | 2008-07-03 |
EP1827762B1 (en) | 2013-09-11 |
CN101048259A (en) | 2007-10-03 |
KR101287501B1 (en) | 2013-07-19 |
US20090277098A1 (en) | 2009-11-12 |
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