EP2305426A1 - Outil abrasif - Google Patents

Outil abrasif Download PDF

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Publication number
EP2305426A1
EP2305426A1 EP10181613A EP10181613A EP2305426A1 EP 2305426 A1 EP2305426 A1 EP 2305426A1 EP 10181613 A EP10181613 A EP 10181613A EP 10181613 A EP10181613 A EP 10181613A EP 2305426 A1 EP2305426 A1 EP 2305426A1
Authority
EP
European Patent Office
Prior art keywords
abrasive
layer
grinding tool
abrasive grain
binder
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.)
Withdrawn
Application number
EP10181613A
Other languages
German (de)
English (en)
Inventor
Christian Jentgens
Adrian Schoch
Hans-Ulrich Kaufmann
René BRUNNER
Peter Eggenberger
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sia Abrasives Industries AG
Original Assignee
Sia Abrasives Industries AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=38009609&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP2305426(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from EP05111767A external-priority patent/EP1797995B1/fr
Application filed by Sia Abrasives Industries AG filed Critical Sia Abrasives Industries AG
Priority to EP10181613A priority Critical patent/EP2305426A1/fr
Publication of EP2305426A1 publication Critical patent/EP2305426A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D15/00—Hand tools or other devices for non-rotary grinding, polishing, or stropping
    • B24D15/02—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface
    • B24D15/023—Hand tools or other devices for non-rotary grinding, polishing, or stropping rigid; with rigidly-supported operative surface using in exchangeable arrangement a layer of flexible material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B29/00—Machines or devices for polishing surfaces on work by means of tools made of soft or flexible material with or without the application of solid or liquid polishing agents
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B7/00—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor
    • B24B7/20—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground
    • B24B7/22—Machines or devices designed for grinding plane surfaces on work, including polishing plane glass surfaces; Accessories therefor characterised by a special design with respect to properties of the material of non-metallic articles to be ground for grinding inorganic material, e.g. stone, ceramics, porcelain
    • 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
    • B24D11/005—Making abrasive webs
    • 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
    • B24D3/002—Flexible supporting members, e.g. paper, woven, plastic materials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D9/00—Wheels or drums supporting in exchangeable arrangement a layer of flexible abrasive material, e.g. sandpaper
    • B24D9/08—Circular back-plates for carrying flexible material

Definitions

  • the present invention relates to a novel abrasive tool with diamond or cubic boron nitride abrasive, which is particularly suitable for wet grinding hard surfaces of, for example, ceramic paints.
  • Hard surfaces require a very hard abrasive grain such as diamond, cubic boron nitride or boron carbide. These are quite expensive, which stands in the way of their dissemination.
  • wet grinding is understood to mean that the abrasive tool is moistened with water before use, for example with the aid of a hand sprayer.
  • the expert usually adds just enough water that not the entire surface of the workpiece is wet, but that just the surface to be treated is moistened so far that the grinding tool can absorb the liquid in the compressible part again.
  • the skilled person rinses out the compressible part by applying slight pressure and adds new water.
  • the water could also be supplied permanently.
  • the cumulative contact time of the grinding tool with the surface to be processed is to be understood by the service life, via which a desired grinding performance can be maintained.
  • the desired grinding performance is a uniform matt appearance of the machined surface.
  • a ceramic surface is to be understood as meaning a surface which contains ceramic constituents and is therefore hard.
  • a ceramic coating PPG 9000 can preferably be processed.
  • the abrasive grain is applied only superficially, i. the abrasive grain is only on the surface forming portions of the first layer, e.g. the webs in a network structure with holes. According to the invention particularly preferred, these webs are not completely coated with abrasive.
  • the inventive grinding tool is characterized by a high degree of flexibility due to the nature of the substrate.
  • the resin-bonded abrasive grain on the surface can thus be pushed out of the tool during the grinding process. This leads to significantly longer service life and gentle machining of the processed product.
  • the water supplied to the grinding tool is at least partially retained in the second, water-absorbable and compressible layer.
  • the resulting during grinding sanding dust can be easily removed by squeezing the grinding tool.
  • the water contained in the second layer is pushed out, passes to the surface of the grinding tool due to the permeability of the grain-carrying layer and rinses the grinding dust located on or in the surface of the grinding tool.
  • the grinding tool can be easily used again following this simple and fast process. However, it is sufficient to completely occur during the machining process compression of the grinding tool to squeeze the water present in the second layer during processing and to achieve the desired removal of the grinding dust continuously.
  • the service lives of the grinding tool according to the invention exceed the service lives of conventional full-surface grinding tools by a factor of about 20 to 100.
  • abrasive grain natural or artificial diamond or cubic boron nitride may be used, with diamond being preferred not least for economic reasons.
  • the indicated amounts of abrasive, abrasive grain and binder refer to the amount of abrasive applied which is determined as follows: A substrate having a hole structure with a total surface area of 100 cm 2 (with a ridge content (effective surface area) of 33 to 50% and one Hole proportion of 50 to 67%) is weighed in the uncoated state. Subsequently, the abrasive is applied and the resulting grinding tool is weighed again in the wet state and the difference between the determined values determined to obtain the applied amount of abrasive in the wet state. The abrasive tool is then dried in an oven at 130 ° C for 2 hours and weighed again to obtain the applied amount of abrasive in the dry state.
  • the amount of abrasive grain and binder will vary depending on the size of the abrasive grain. As the grain size increases, the abrasive grain to binder ratio gradually shifts toward the binder, i. In a fixed amount of binder less abrasive grain is absorbed with increasing grain size.
  • the grinding tool in the dry state preferably has on its surface an amount of abrasive grain of a size of 1 to 30 microns of 2.5 to 10 g / m 2 (equivalent to 12.5 to 50 carats / m 2 diamond) or an amount on abrasive grain of a size of 30 to 120 microns from 10 to 40 g / m 2 (equivalent to 50 to 200 carats / m 2 diamond) on.
  • the abrasive grain is bonded to the substrate via a resin binder.
  • Metal bonded abrasives are not included in the present invention.
  • the use of a so-called resin-bonded abrasive grain or "Resin-Bond-Diamond” has the advantage that it has an increased Nachharrencing tendency (English high friability).
  • all conventional resin binders can be used, for example phenolic resins (preferably with a water content of 20%), melamine resins, urea resins, epoxy resins, polyester resins, polyacrylate resins or polyurethane resins.
  • water-soluble resins such as phenolic resins
  • phenolic resins which are water-soluble in the uncured state.
  • the use of water-soluble resins allows easy recovery of the abrasive grain from wastes that may be incurred in application processes such as spraying.
  • the residue of abrasive grain and unhardened resin is simply poured into an aqueous, preferably alkaline solution and the resin separated cleanly and efficiently.
  • the application process can be carried out more quickly, without any associated economic disadvantages (loss of abrasive grain).
  • the amount of binder varies depending on the size of the abrasive grain used. According to the invention, the amount of binder on the grinding tool in the dry state (ie after evaporation of the solvent) is 2.5-10 g / m 2 when using abrasive grain having a size of 1 to 30 ⁇ m or 10 to 80 g / m 2 binder when using abrasive grain a size of 30 to 120 microns.
  • the substrate of the grinding tool according to the invention comprises at least two different layers.
  • the first layer carries the abrasive grain which is bonded to this first layer via the resin binder described above.
  • the first layer must be permeable to water so that the water retained in the second layer can pass through that layer and wash away in or on top of deposited abrasive dust.
  • the first layer also serves to reinforce the second layer. On the other hand, however, it must have sufficient flexibility to allow compression of the second layer for squeezing out the water retained therein, while maintaining the shape of the grinding tool, as well as adapting the grinding tool to the surface structure of the workpiece to be machined.
  • the surface of the first layer carrying the abrasive should be flat.
  • plane is understood to mean that the portions forming the surface of the layer (e.g., webs with mesh structure with holes) of the first layer are at substantially the same level (within the usual measurement accuracy).
  • the first layer preferably has a thickness of 0.01 cm to 0.1 cm.
  • the selected thickness depends on the requirement profile and can be determined and adjusted by the skilled person without any problems.
  • the grinding tool according to the invention comprises at least one second layer.
  • the second layer must be able to absorb and retain water. Furthermore, the second layer must be compressible so that the water contained therein can be pushed out of this layer and through the first layer. In this case, however, the second layer or the entire grinding tool should be dimensionally faithful, ie its original shape after termination of external force again taking. In this way it is ensured that the grinding tool according to the invention can again be used in the same way and freed from grinding dust and adapts to the surface condition of the workpiece to be machined.
  • the second layer of the substrate of the grinding tool according to the invention thus consists of a soft foam.
  • the skilled person is aware of soft foams.
  • An example is open-celled polyether PU foam.
  • the second layer can consist of several, preferably two, sublayers.
  • An example of this is the "3D spacer fabrics" from Scott & Fyve (Great Britain), a product consisting of two inseparably interwoven fabric layers.
  • the backsheets are not made of foam, it is of course also possible to use two foam underlays.
  • the second layer (or the entirety of sub-layers, which together form the second layer) generally has a thickness of 0.2 cm to 1 cm.
  • the selected thickness depends on the requirement profile and can be determined and adjusted by the skilled person without any problems.
  • the first and second layers may be bonded together in a conventional and known manner, for example by gluing, flame laminating or Velcro bonding. In the latter case, only the first, grain-bearing layer is laminated with a velor. The second layer is then in the form of a reusable intermediate pads before. The connection must, however, be permeable to water in any case.
  • the two layers are joined together.
  • a simple replacement of the first, the abrasive grain bearing layer is possible.
  • the present invention also relates to the use of a unit of a water-permeable, flexible textile layer comprising multi-filaments and on which an abrasive of binder and abrasive grain selected from the group consisting of diamond and cubic boron nitride is deposited, in one of the above described inventive grinding tool.
  • the present invention also relates to the use of a unit comprising a layer which can absorb water, is compressible under retention of shape and has a water-permeable, self-adhering layer on at least one side, in a grinding tool according to the invention described above.
  • the surface of the second layer which faces away from the surface carrying the first layer, is designed to be self-adhesive is. This can be done by providing on the corresponding surface of the second layer a layer of conventional suede (for example made of nylon) or Velcro or an adhesive layer.
  • a layer of conventional suede for example made of nylon
  • Velcro or an adhesive layer.
  • the inventive grinding tool is particularly suitable for processing surfaces containing ceramic components.
  • surface materials to be treated are: ceramic surfaces per se, ceramic lacquers on wood (eg sealed parquet floors), technical glass, glass, composite materials based on stone or minerals, fibrous composites such as fiberglass plastics (GRPs) or carbon fiber plastics (CFKs) ) or aramid fiber plastics, or "super hard" paints such as epoxy paints.
  • the abrasive tool of the invention is preferably provided in the form of discs or strips for use on conventional hand-held grinders, e.g. Excenterschleifmaschinen be applied.
  • the abrasive tool of the invention can be produced by applying to the first layer of the substrate the abrasive grain with the resin binder by a pressure-free coating process.
  • pressure-free coating methods are, for example, spray coating, dip coating or kiss coating, air knife or transfer method.
  • a water-soluble resin binder in the uncured state. It is then not necessary in the application process take special care to the effect that the expensive abrasive grain as completely as possible reaches the substrate surface. Rather, faster processes such as over-spraying the substrate (beyond the surface to be coated) can be accomplished by providing a catcher such as a pan adjacent and below the substrate to be coated.
  • the grinding tool is produced in that only the surface of the first layer is coated in the immersion process. Especially in the case of a substrate with a hole-mesh structure, the application quantity can be precisely metered.
  • Such available grinding tools are the subject of the present invention.
  • the surface treatment with the grinding tools according to the invention is carried out by wet grinding, preferably with a hand sprayer.
  • the expert usually adds just enough water that not the entire surface of the workpiece is wet, but that just the surface to be treated is moistened so far that the grinding tool can absorb the liquid in the compressible part again. If necessary, the skilled person rinses out the compressible part by applying slight pressure and adds new water.
  • a grinding tool 1 according to the invention is shown.
  • the grinding tool has resin-bonded diamond 2 as abrasive grain.
  • the binder resin is preferably a phenolic resin.
  • the diamond is located on the elevations (webs) of the first layer 3, preferably of a knitted fabric.
  • the first layer is permeable to water and preferably has a planar surface.
  • the first layer is located on a second layer 4, which can absorb water and is compressible under retention of shape.
  • this second layer 5 is made of a soft foam.
  • the two layers are connected by a water-permeable connection.
  • the layer 5 is a Velcro layer or a layer of an adhesive.
  • Fig. 2 is a plan view of a grinding tool according to the invention shown. It can be seen that a comparatively small amount of abrasive grain is applied to the webs of the surface of the first substrate layer.
  • the grinding performance of the abrasive tool thus produced was determined on 30mm discs with an eccentric grinder.
  • the abrasive surface of the abrasive tool was moistened with a hand sprayer as described above.
  • a scratch-resistant ceramic varnish PPG 9000 was sanded with the grinding tool for 5 s in the same place before proceeding to the processing of another place. Appears after such editing the ground point as dull, the grinding performance is considered good.
  • Fig. 3 the result of such a test is shown with the grinding tool according to Example 1 over a period of 20 minutes.
  • inventive grinding tool With the inventive grinding tool, it was possible to work in this way well over 100 sites with very good grinding result. After 20 minutes accumulated contact time between grinding tool and machined surface of the experiment was terminated without the inventive grinding tool would have been already consumed at this time. The inventive grinding tool thus had a service life of more than 20 minutes
  • Comparative Examples 1 and 5 are various abrasive tools with corundum as abrasive grains on a paper substrate (Comparative Example 1: Norton A975 (P400) from Norton; Comparative Example 5: siamic1990 (P1000) from sia abrasives). Comparative Examples 2 and 3 were grinding tools with a substrate corresponding to the grinding tool according to the invention, but with corundum or silicon carbide as abrasive grain (Comparative Example 2: Abralon (K1000) from Mirka with silicon carbide as abrasive grain Comparative Example 3: siaair velvet (K1000) with corundum as abrasive grain from the company sia abrasives). Comparative Example 4 was a grinding tool with corundum as abrasive grain on a base made of non-woven fabric (siavlies (K6000) from sia abrasives).

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP10181613A 2005-12-07 2006-09-12 Outil abrasif Withdrawn EP2305426A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP10181613A EP2305426A1 (fr) 2005-12-07 2006-09-12 Outil abrasif

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP05111767A EP1797995B1 (fr) 2005-12-07 2005-12-07 Outil abrasif
EP10181613A EP2305426A1 (fr) 2005-12-07 2006-09-12 Outil abrasif
EP06120537A EP1795303B1 (fr) 2005-12-07 2006-09-12 Outil abrasif

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
EP06120537.3 Division 2006-09-12

Publications (1)

Publication Number Publication Date
EP2305426A1 true EP2305426A1 (fr) 2011-04-06

Family

ID=38009609

Family Applications (2)

Application Number Title Priority Date Filing Date
EP06120537A Revoked EP1795303B1 (fr) 2005-12-07 2006-09-12 Outil abrasif
EP10181613A Withdrawn EP2305426A1 (fr) 2005-12-07 2006-09-12 Outil abrasif

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP06120537A Revoked EP1795303B1 (fr) 2005-12-07 2006-09-12 Outil abrasif

Country Status (2)

Country Link
US (1) US20070128989A1 (fr)
EP (2) EP1795303B1 (fr)

Families Citing this family (12)

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Publication number Priority date Publication date Assignee Title
KR100788295B1 (ko) * 2007-03-09 2007-12-27 주움텍스타일 주식회사 연마기재 및 연마포
US8206511B2 (en) * 2009-10-06 2012-06-26 Ecolab Usa Inc. Daily cleaner with slip-resistant and gloss-enhancing properties
US9920281B2 (en) 2009-11-12 2018-03-20 Ecolab Usa Inc. Soil resistant surface treatment
FR2954723B1 (fr) * 2009-12-29 2012-04-20 Saint Gobain Abrasives Inc Article abrasif comprenant un espace creux entre ses faces avant et arriere, et procede de fabrication
ITCR20100033A1 (it) * 2010-10-05 2012-04-06 Paolo Corazzi Fibre Srl Procedimento per ottenere un disco abrasivo microforato
MX340925B (es) 2010-10-06 2016-08-01 Saint Gobain Abrasifs Sa Abrasivo compuesto no tejido que comprende particulas abrasivas de diamante.
US8585829B2 (en) 2010-12-13 2013-11-19 Ecolab Usa Inc. Soil resistant floor cleaner
CN103930957B (zh) * 2011-11-14 2016-10-26 三菱电机株式会社 电磁线圈及其制造方法以及绝缘带
ES2428613B1 (es) * 2012-05-04 2014-10-06 Prima Sitges S.L. Utensilio manual para el mantenimiento de superficies de piedra
RU2731496C9 (ru) * 2017-02-14 2020-11-18 Август Рюггеберг Гмбх & Ко. Кг Способ изготовления шлифовального инструмента и шлифовальный инструмент
CN108927720A (zh) * 2018-07-01 2018-12-04 汇科智能装备（深圳）有限公司 一种电动微去除装置及应用
CN110712140B (zh) * 2019-10-17 2021-10-26 江苏佳威研磨科技有限公司 一种高效能双面研磨砂盘

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Publication number Priority date Publication date Assignee Title
WO1996007509A1 (fr) * 1994-09-06 1996-03-14 Oy Kwh Mirka Ab Produit abrasif et son procede de fabrication
US5954844A (en) * 1996-05-08 1999-09-21 Minnesota Mining & Manufacturing Company Abrasive article comprising an antiloading component
DE19933887A1 (de) * 1999-07-22 2001-01-25 Martin Wiemann Schleifwerkzeug und Anwendungsverfahren
US20050262773A1 (en) * 2000-11-03 2005-12-01 3M Innovative Properties Company Flexible abrasive product and method of making and using the same
WO2005102606A1 (fr) * 2004-04-13 2005-11-03 3M Innovative Properties Company Articles abrasifs non tisses et procedes associes

Also Published As

Publication number Publication date
EP1795303A1 (fr) 2007-06-13
EP1795303B1 (fr) 2010-11-17
US20070128989A1 (en) 2007-06-07

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