EP0095055A2 - Procédé de fabrication d'un corps abrasif - Google Patents

Procédé de fabrication d'un corps abrasif Download PDF

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Publication number
EP0095055A2
EP0095055A2 EP83104209A EP83104209A EP0095055A2 EP 0095055 A2 EP0095055 A2 EP 0095055A2 EP 83104209 A EP83104209 A EP 83104209A EP 83104209 A EP83104209 A EP 83104209A EP 0095055 A2 EP0095055 A2 EP 0095055A2
Authority
EP
European Patent Office
Prior art keywords
layer
grinding
abrasive
elastomer
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.)
Granted
Application number
EP83104209A
Other languages
German (de)
English (en)
Other versions
EP0095055B1 (fr
EP0095055A3 (en
Inventor
Rainer Augustin
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.)
Dr Elbel Schleifmittel GmbH
Original Assignee
Dr Elbel Schleifmittel GmbH
Sea Schleifmittel Entwicklung Anwendung GmbH
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
Application filed by Dr Elbel Schleifmittel GmbH, Sea Schleifmittel Entwicklung Anwendung GmbH filed Critical Dr Elbel Schleifmittel GmbH
Priority to AT83104209T priority Critical patent/ATE33106T1/de
Publication of EP0095055A2 publication Critical patent/EP0095055A2/fr
Publication of EP0095055A3 publication Critical patent/EP0095055A3/de
Application granted granted Critical
Publication of EP0095055B1 publication Critical patent/EP0095055B1/fr
Expired legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D13/00—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor
    • B24D13/02—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery

Definitions

  • the invention relates to an elastic abrasive body for shape-following grinding, in which the active grinding surface is covered with abrasive grains and a partial volume consists of elastic material, and a method for producing such an abrasive body.
  • a grinding wheel according to the type mentioned has grinding grains statistically distributed in an elastomeric and mostly foamed binder.
  • the individual abrasive grain due to its elastic, resilient surface, evades the grinding pressure exerted by the machined workpiece due to rotating and tilting movements, no tangible cutting performance can be achieved with such abrasive bodies, which is why they are mainly used for finishing work for which they are excellently suited.
  • grinding belts are mainly used, the required elasticity being achieved instead of the elastic material as part of the grinding wheel by a more or less resilient contact roller over which the grinding belt is guided.
  • these grinding belts still have the deficiency that the cutting performance decreases with increasing service life and that the roughness depth also drops sharply. For this reason, sanding belts cannot be used at all in some areas.
  • the object of the invention is therefore to provide an elastic abrasive for all industrial applications, which has a more favorable ratio between service life (service life) and manufacturing costs (production costs) than the previously known solutions.
  • the invention solves this in that the grinding-active surface is formed from a layer of a hardened binder-abrasive grain mixture, which is connected to a foamed elastomer forming a backing layer.
  • the abrasive body according to the invention combines a uniformly high cutting performance during this period of use and also a uniform roughness depth. It is further characterized by the fact that it remains unaffected by the various coolants even when grinding, is completely independent of climate fluctuations and can be produced inexpensively and with constant quality.
  • a method according to the invention for producing such an elastic abrasive article consists in accelerating the binder-abrasive grain mixture and the elastomer forming the later backing layer in a molded part which specifies the later form of the abrasive article under the action of a force, in particular that those used for producing the abrasive article Mixtures are applied in succession under the action of force on the molded part.
  • the invention proposes the centrifugal force in a rotating system in which the molded part with the binder-abrasive grain mixture is located or under whose influence the two mixtures are applied to the molded part.
  • elastic grinding bodies can be produced in the practically required geometric shapes, for example in the form of disks (disk grinding disks) or wheel shape.
  • Advantageous refinements of the grinding wheel according to the invention and its production method can be found in the subclaims.
  • 1 and 2 in section representations consists of a layer 11 of a hardened binder-abrasive grain mixture, a carrier layer 12 formed of a foamed elastomer and a further layer 13 made of fabric, in particular textile fiber fabric.
  • the layer 11 of the binder-abrasive grain mixture has recesses 11a in such a way that the layer 11 is in shape. Islands 11b sits on the elastomer carrier layer 12.
  • All known hard materials such as corundum, silicon carbide, boron carbide and other carbides, garnet, natural sandpaper, glass powder, etc., can be used as the grinding grit for the layer 11 support and to achieve a sufficient chip gap volume in the active grinding surface, it is also recommended to install grinding aids such as pyrite, hollow corundum, marble powder, cryolite, etc., the density of which should be at least 2g / cm3.
  • Cold-curing types e.g. Polyurethanes curing at room temperature.
  • High-quality elastomers that cure warm can also be used for difficult grinding tasks.
  • thermosetting polyurethanes, thiocols and other liquid prepolymers of elastomers can be used.
  • the thickness of the binder abrasive grain layer 11 depends on the surface of the abrasive grain islands 11b and is 10-50% of the maximum extension (edge length, diameter) of the abrasive grain islands 11b.
  • the thickness of the elastomer carrier layer 12 is at least 5 mm, for most applications 10-20 mm are provided.
  • the width and number of the recesses 11a are selected such that the area ratio of grain islands 11b to recesses 11a is in the range from 50:50 to 95: 5.
  • soft, foaming polyurethane types or foaming thiocols can be used for the carrier layer 12.
  • binder formulations namely a harder, non-foaming formulation for the abrasive grain layer 11 and a softer adjusted and / or foaming formulation for the elastomer layer 12.
  • the difference in hardness between grain layer 11 and elastomer layer 12 results solely from the grain content. Even when using the same formulation for the binder of the grain layer 11 and the elastomer layer 12, the difference in hardness is therefore 10-20 Shore A points.
  • the differences in hardness between the grain layer 11 and the elastomer carrier layer 12 should not differ too much.
  • Shore-A-30 of the elastomer layer 12 the grain layer 11 should be set to Shore -A- 80 to 85; with a Shore-A 60 hardness of the elastomer layer 12, the hardness of the grain layer 11 can be Shore-D-8o.
  • an elastic abrasive body can be produced which is used in all industrial areas of application with regard to stability and dimensional sequence properties on the workpieces to be processed can.
  • the invention proposes a device as shown in FIGS. 7 and 8:
  • This device consists of a centrifuge in which a molded part 23 rotates within a protective hood 25 with a cover 22 to accommodate the mixture components of the grinding wheel.
  • the inside volume of the grinding wheel volume is limited by an inner ring 24.
  • the molded part 23 has corresponding ribs or projections which are complementary to the desired surface structure of the grinding body, for example to the geometric configurations of the cominels 11b and the recesses 11a shown in FIGS. 3 to 6.
  • This first method in its simplest form, consists first of all in that the entire mixture used to produce the two layers 11 and 12 is applied to the molded part 23 and then the centrifuge is set in rotation.
  • the grinding aids which are specifically heavier in relation to the elastomeric binder, if necessary grinding aids, are concentrated in the grinding-active surface, whereas the grinding-free and specifically lighter, optionally foaming elastomer builds up against the direction of the centrifugal force, as a result of which the two layers 11 and 12 with a smooth transition form.
  • the size of the centrifugal force and thus the rotational speed of the centrifuge depends on the viscosity and the open time as well as the foaming pressure of the elastomer used.
  • accelerations of the order of 3 - 6800 g, essentially in the range of 15 0 - 2500 g, are required to produce the grinding wheel according to the invention.
  • the production takes place in two shots, for which purpose an axially displaceable filler neck 21, with which a metered amount of an abrasive grain binder is initially inserted, is formed in the cavity provided between the molded part 23 and the inner ring 24 to form the grinding body -
  • the mixture is metered in, leveled when the mold is upright and the necessary amount of the grain-free elastomer (later backing layer) is injected immediately, advantageously by an automatic metering machine with a mixing head.
  • the binder containing the abrasive grain can have the same composition as the grain-free mixture used to produce the backing layer, but the former without, the latter with foaming agent.
  • the binder containing the abrasive grain for producing the layer 11
  • the binder containing the abrasive grain for producing the layer 11
  • the binder containing the abrasive grain for producing the layer 11
  • the grain-free elastomer mixture is applied to the not yet hardened grain binder mixture. This not only simplifies the manufacture of the abrasive articles according to the invention, it also achieves a smooth and stress-free hardness transition from the layer 11 containing the abrasive grain to the grain-free and softer elastomer layer 12, which is also supported by the centrifugal force gradient decreasing towards the center of rotation of the centrifuge.
  • the mixtures introduced in this way need not be cured to their full extent or at all under the action of the acceleration until they are demoldable.
  • the acceleration can be reduced after a certain time from, for example, 153-2446 g to 2.7- 153 g, in which the spin is continued until the mixture is still sticky but sufficiently firm. Then the mold can be removed and the abrasive body in the molded part, if necessary further hardened under the influence of heat.
  • the method according to the invention opens up the possibility of designing the inner ring 24 as a reusable core made of any hard material, the peripheral surface of which is freshly ground and optionally roughened and / or provided with an adhesion-promoting primer.
  • the shaped ring 24 designed in this way is then provided with a roll of open-meshed and optionally provided with adhesion promoter glass fiber fabric 13 before the molded part is filled, so that this fabric roll, which can also be low-stretch fabric, fleece, etc. made of other textile fibers, is an integral part Part of the grinding wheel produced.
  • the excess foam of the elastomer protrudes as a bead over the mold edge and can be easily cut off with a knife before the mass is removed from the mold and finally hardened .
  • the grinding wheel according to the invention and a method for its production have been described above using the example of a wheel-shaped grinding wheel, but grinding wheels in other shapes can also be produced, for example in the form of disks or plates.
  • the required shapes are rotatably suspended in the centrifuge, whereby the centrifugal force then also acts in the axial direction of the grinding wheel.
  • the foaming of the grain-free elastomer towards the pivot point can also be limited, but for the simplicity of the device it can also be freely foamed.
  • the grinding wheel must then be ground flat. Double-sided adhesive film can then be used to fasten the grinding plates thus obtained to a base.
  • the mixtures used do not need to be cured until they can be removed from the mold or under full acceleration, depending on the size of the grinding wheel, acceleration value, viscosity, open time and other parameters, a 3o - 180 second spin time is sufficient until the distribution is complete has stabilized in the pane structure so that the shape can be removed. It must be set down horizontally until the binder has sufficiently hardened, with a heat treatment for the final hardening being carried out simultaneously or subsequently.
  • This second method for producing the grinding bodies according to the invention is based on a flat shape which corresponds to the development of the finished grinding wheel: the width of the shape corresponds to the width of the grinding wheel to be produced, the length of its circumference.
  • this negative form consists of an elastomeric impression material, for example of silicone rubber.
  • abrasive articles according to the invention in the form of the islands 11b, corresponding mold cavities of this form are filled with a highly viscous and / or thixotropic abrasive bead binder mixture and wiped off. Then the mold is rolled into a circle and placed in the centrifuge mold. Then, with rotation, as described, an elastomer is used for back casting or back-foaming and curing.
  • a variant of this method is based on a rigid negative form.
  • a metal is conceivable as the molding material, but it is expedient to use a material which allows such molds to be produced more cheaply. Plaster, concrete, epoxy, polyester resin, deep-drawn foils or the like can be used.
  • the mold cavities provided with a release agent are in turn filled with the abrasive grain binder mixture until this mass is flush with the mold surface.
  • a carrier material of the appropriate dimensions is placed on top. Possible carrier materials are, for example, paper, foils, nonwovens, woven fabrics, knitted fabrics or the like.
  • the backing material must bond firmly to the Schleifkom binder mixture in the mold nests.
  • the backing material can be coated accordingly, provided that the self-adhesive strength of the Schleifkom binder mixture in the mold cavities is not sufficient for this.
  • the carrier material with the firmly adhering grinding knobs is pulled off the mold and then, with knobs facing outwards, inserted into the ring mold and, as already described , back-poured or back-foamed.
  • binders can now also be used for the grinding layer and the elastomer layer which cannot be combined by the former method.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
EP83104209A 1982-05-25 1983-04-29 Procédé de fabrication d'un corps abrasif Expired EP0095055B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT83104209T ATE33106T1 (de) 1982-05-25 1983-04-29 Verfahren zur herstellung eines schleifkoerpers.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3219567 1982-05-25
DE19823219567 DE3219567A1 (de) 1982-05-25 1982-05-25 Elastischer schleifkoerper und verfahren zu seiner herstellung

Publications (3)

Publication Number Publication Date
EP0095055A2 true EP0095055A2 (fr) 1983-11-30
EP0095055A3 EP0095055A3 (en) 1984-02-22
EP0095055B1 EP0095055B1 (fr) 1988-03-23

Family

ID=6164423

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83104209A Expired EP0095055B1 (fr) 1982-05-25 1983-04-29 Procédé de fabrication d'un corps abrasif

Country Status (4)

Country Link
US (1) US4539017A (fr)
EP (1) EP0095055B1 (fr)
AT (1) ATE33106T1 (fr)
DE (2) DE3219567A1 (fr)

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0242410A1 (fr) * 1986-04-17 1987-10-28 Carborundum Schleifmittelwerke GmbH Procédé de fabrication d'un élément abrasif élastique
WO1995000294A1 (fr) * 1993-06-17 1995-01-05 Minnesota Mining And Manufacturing Company Bandes abrasives a support sans soudure, souple, sans fin et leurs procedes de preparation
US5573619A (en) * 1991-12-20 1996-11-12 Minnesota Mining And Manufacturing Company Method of making a coated abrasive belt with an endless, seamless backing
US5578096A (en) * 1995-08-10 1996-11-26 Minnesota Mining And Manufacturing Company Method for making a spliceless coated abrasive belt and the product thereof
US5584897A (en) * 1994-02-22 1996-12-17 Minnesota Mining And Manufacturing Company Method for making an endless coated abrasive article
US5681612A (en) * 1993-06-17 1997-10-28 Minnesota Mining And Manufacturing Company Coated abrasives and methods of preparation
RU2169068C2 (ru) * 1997-01-07 2001-06-20 Нортон Компани Способ изготовления шлифовального изделия и шлифовальное изделие с покрытием
RU2173631C2 (ru) * 1997-01-08 2001-09-20 Нортон Компани Способ глубокой печати для получения абразивных поверхностей с нанесенным рельефом
US6406577B1 (en) 1991-12-20 2002-06-18 3M Innovative Properties Company Method of making abrasive belt with an endless, seamless backing
US6406576B1 (en) 1991-12-20 2002-06-18 3M Innovative Properties Company Method of making coated abrasive belt with an endless, seamless backing
CN103506967A (zh) * 2013-07-03 2014-01-15 陕西德赛新材料科技有限公司 植入法生产高效磨削材料的原理和工艺方法
CN104227575A (zh) * 2014-09-15 2014-12-24 陕西德赛新材料科技有限公司 一种基于磨削单元植入的柔性磨具制备方法
CN105729318A (zh) * 2016-05-05 2016-07-06 珠海市巨海科技有限公司 瓷砖素坯抛磨用砂轮与制造方法及抛磨装置、抛磨方法

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US4681600A (en) * 1984-09-05 1987-07-21 Extrude Hone Corporation Cutting tool fabrication process
DE59008192D1 (de) * 1989-10-24 1995-02-16 Phoenix Ag Verfahren und Vorrichtung zur Herstellung einer Scheibe zum Polieren.
US5181939A (en) * 1989-12-20 1993-01-26 Charles Neff Article and a method for producing an article having a high friction surface
US5213590A (en) * 1989-12-20 1993-05-25 Neff Charles E Article and a method for producing an article having a high friction surface
US5378251A (en) * 1991-02-06 1995-01-03 Minnesota Mining And Manufacturing Company Abrasive articles and methods of making and using same
US5152917B1 (en) * 1991-02-06 1998-01-13 Minnesota Mining & Mfg Structured abrasive article
US5107626A (en) * 1991-02-06 1992-04-28 Minnesota Mining And Manufacturing Company Method of providing a patterned surface on a substrate
US5437754A (en) * 1992-01-13 1995-08-01 Minnesota Mining And Manufacturing Company Abrasive article having precise lateral spacing between abrasive composite members
US5492548A (en) * 1992-03-31 1996-02-20 J & L Plate, Inc. Rough edged refiner plate cutter bars
US6083445A (en) * 1993-07-13 2000-07-04 Jason, Inc. Method of making a plateau honing tool
BR9406687A (pt) * 1993-05-26 1996-02-06 Minnesota Mining & Mfg Processo para polimento de uma peça de trabalho
US5549962A (en) * 1993-06-30 1996-08-27 Minnesota Mining And Manufacturing Company Precisely shaped particles and method of making the same
RU2124978C1 (ru) * 1993-09-13 1999-01-20 Миннесота Майнинг Энд Мэнюфекчуринг Компани Абразивное изделие, способ его производства, способ его использования для чистовой обработки и рабочий инструмент для его производства
US5658184A (en) * 1993-09-13 1997-08-19 Minnesota Mining And Manufacturing Company Nail tool and method of using same to file, polish and/or buff a fingernail or a toenail
US5632668A (en) * 1993-10-29 1997-05-27 Minnesota Mining And Manufacturing Company Method for the polishing and finishing of optical lenses
KR970701118A (ko) * 1994-02-22 1997-03-17 로저 로이 템트 연마 물품, 이의 제조 방법 및 이를 표면 마무리용으로서 사용하는 방법(abrasive article, a method of making same, and a method of using same for finishing)
JP2808261B2 (ja) * 1995-10-31 1998-10-08 株式会社コバックス 研磨シートおよびその製造方法
US6524681B1 (en) 1997-04-08 2003-02-25 3M Innovative Properties Company Patterned surface friction materials, clutch plate members and methods of making and using same
EP0972495A1 (fr) * 1998-07-13 2000-01-19 Identoflex AG Méthode de fabrication d'instruments dentaires pour le traitement de surfaces
DE19948996A1 (de) * 1999-10-11 2001-04-12 Rieter Ag Maschf Schleif- oder Putzeinrichtung
US6471733B1 (en) * 2000-09-26 2002-10-29 Alex Cooper Polishing wheel
AU2003258111A1 (en) * 2002-08-07 2004-02-25 Charles E. Neff A method of fabricating pliant workpieces, tools for performing the method and methods for making those tools
WO2004062851A1 (fr) * 2003-01-15 2004-07-29 Mitsubishi Materials Corporation Outil de coupe pour materiau souple
TW200726582A (en) * 2005-10-04 2007-07-16 Mitsubishi Materials Corp Rotary tool for processing flexible materials
FI121654B (sv) 2006-07-10 2011-02-28 Kwh Mirka Ab Oy Förfarande för tillverkning av en flexibel sliprondell och en flexibel sliprondell
NO326539B1 (no) * 2007-01-31 2008-12-29 Autosock As Tekstilmateriale
JP2013514901A (ja) * 2009-12-22 2013-05-02 スリーエム イノベイティブ プロパティズ カンパニー 可撓性研磨材物品及び製造方法

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FR1383274A (fr) * 1962-02-15 1964-12-24 Gates Rubber Co Procédé pour mouler des objets avec des élastomères liquides
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DE2230963A1 (de) * 1972-06-24 1974-01-10 Koenig & Co Werkzeugfabrik Kar Elastische schleifscheibe
AT347283B (de) * 1975-03-07 1978-12-27 Collo Gmbh Schaumstoffkoerper fuer reinigungs-, scheuer- und/oder polierzwecke u. dgl.
EP0004454A3 (fr) * 1978-03-23 1979-10-31 Robert Michael Barron Outils abrasifs revêtus
DE2931695C2 (de) * 1979-08-04 1987-02-19 Heinrich Lippert Gmbh, 7530 Pforzheim Schleifkörper zum Vor- und Nachschleifen

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0242410A1 (fr) * 1986-04-17 1987-10-28 Carborundum Schleifmittelwerke GmbH Procédé de fabrication d'un élément abrasif élastique
US6406576B1 (en) 1991-12-20 2002-06-18 3M Innovative Properties Company Method of making coated abrasive belt with an endless, seamless backing
US5573619A (en) * 1991-12-20 1996-11-12 Minnesota Mining And Manufacturing Company Method of making a coated abrasive belt with an endless, seamless backing
US6406577B1 (en) 1991-12-20 2002-06-18 3M Innovative Properties Company Method of making abrasive belt with an endless, seamless backing
US6066188A (en) * 1991-12-20 2000-05-23 Minnesota Mining And Manufacturing Company Coated abrasive belt with an endless seamless backing and method of preparation
US5609706A (en) * 1991-12-20 1997-03-11 Minnesota Mining And Manufacturing Company Method of preparation of a coated abrasive belt with an endless, seamless backing
US5924917A (en) * 1993-06-17 1999-07-20 Minnesota Mining And Manufacturing Company Coated abrasives and methods of preparation
US5681612A (en) * 1993-06-17 1997-10-28 Minnesota Mining And Manufacturing Company Coated abrasives and methods of preparation
WO1995000294A1 (fr) * 1993-06-17 1995-01-05 Minnesota Mining And Manufacturing Company Bandes abrasives a support sans soudure, souple, sans fin et leurs procedes de preparation
US5584897A (en) * 1994-02-22 1996-12-17 Minnesota Mining And Manufacturing Company Method for making an endless coated abrasive article
US5830248A (en) * 1995-08-10 1998-11-03 Minnesota Mining & Manufacturing Company Method for making a spliceless coated abrasive belt
US5578096A (en) * 1995-08-10 1996-11-26 Minnesota Mining And Manufacturing Company Method for making a spliceless coated abrasive belt and the product thereof
RU2169068C2 (ru) * 1997-01-07 2001-06-20 Нортон Компани Способ изготовления шлифовального изделия и шлифовальное изделие с покрытием
RU2173631C2 (ru) * 1997-01-08 2001-09-20 Нортон Компани Способ глубокой печати для получения абразивных поверхностей с нанесенным рельефом
CN103506967A (zh) * 2013-07-03 2014-01-15 陕西德赛新材料科技有限公司 植入法生产高效磨削材料的原理和工艺方法
CN104227575A (zh) * 2014-09-15 2014-12-24 陕西德赛新材料科技有限公司 一种基于磨削单元植入的柔性磨具制备方法
CN104227575B (zh) * 2014-09-15 2016-07-06 陕西德赛新材料科技有限公司 一种基于磨削单元植入的柔性磨具制备方法
CN105729318A (zh) * 2016-05-05 2016-07-06 珠海市巨海科技有限公司 瓷砖素坯抛磨用砂轮与制造方法及抛磨装置、抛磨方法

Also Published As

Publication number Publication date
US4539017A (en) 1985-09-03
ATE33106T1 (de) 1988-04-15
DE3219567A1 (de) 1983-12-01
EP0095055B1 (fr) 1988-03-23
EP0095055A3 (en) 1984-02-22
DE3376055D1 (en) 1988-04-28

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