EP0447608B1 - Outil abrasif, procédé pour sa fabrication et utilisation d'un matériau spécial à cet effet - Google Patents

Outil abrasif, procédé pour sa fabrication et utilisation d'un matériau spécial à cet effet Download PDF

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Publication number
EP0447608B1
EP0447608B1 EP90116769A EP90116769A EP0447608B1 EP 0447608 B1 EP0447608 B1 EP 0447608B1 EP 90116769 A EP90116769 A EP 90116769A EP 90116769 A EP90116769 A EP 90116769A EP 0447608 B1 EP0447608 B1 EP 0447608B1
Authority
EP
European Patent Office
Prior art keywords
carrier
accordance
resin
grinding
recess
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
Application number
EP90116769A
Other languages
German (de)
English (en)
Other versions
EP0447608A1 (fr
Inventor
Hans Gert Fischer
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.)
LUKAS-ERZETT VEREINIGTE SCHLEIF - UND FRAESWERKZEU
RUETGERS PAGID AKTIENGESELLSCHAFT
Original Assignee
Lukas-Erzett Vereinigte Schleif - und Fraswerkzeug-Fabriken & Co KG GmbH
Ruetgers Pagid 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
Priority claimed from DE19904009342 external-priority patent/DE4009342C2/de
Application filed by Lukas-Erzett Vereinigte Schleif - und Fraswerkzeug-Fabriken & Co KG GmbH, Ruetgers Pagid AG filed Critical Lukas-Erzett Vereinigte Schleif - und Fraswerkzeug-Fabriken & Co KG GmbH
Publication of EP0447608A1 publication Critical patent/EP0447608A1/fr
Application granted granted Critical
Publication of EP0447608B1 publication Critical patent/EP0447608B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • B24D13/14—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face
    • B24D13/16—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising pleated flaps or strips

Definitions

  • the invention relates to a grinding tool, its manufacture and the use of a special material therefor.
  • the invention relates in particular to so-called abrasive flap disks which are used in large quantities and wear relatively quickly.
  • abrasive flap disks which consist of a disc-shaped carrier, which is flat or slightly conical and has a central perforated depression through which it can be coupled to a drive spindle, and of fan-shaped grinding lamellas applied to the non-recessed edge of the carrier.
  • carrier steel sheet aluminum sheet and phenolic or polyester resin-bonded glass fiber mats are known. All three known carrier materials have disadvantages: Sheet steel damages the surface to be machined if the tool is handled carelessly; Aluminum sheet is expensive and has relatively low tensile strength, and the glass fiber-based material poses hardly solvable disposal problems.
  • the object of the invention is to provide a grinding tool of the type mentioned, the carrier is free from the disadvantages of the carrier according to the prior art.
  • the inventive solution to this problem is defined in claim 1. It has been found that this material, which is known per se, is excellently suitable as a material for grinding disk carriers. It comprises layers of wood, paper (especially recycled paper), cotton and other vegetable fibers in the form of fabrics or pile, layered in the direction of the disc thickness and impregnated with a synthetic resin binder, in particular phenolic resin prepolymer. This material is hot pressed into the desired carrier shape under high pressure in an appropriate tool. On the one hand, the layers are crosslinked or felted, and on the other hand, the synthetic resin is polymerized, with web material being drawn in from the outside because of the depression during the pressing. For this reason, the central hole of the plate is also inserted later.
  • This material which is sometimes referred to as "molded wood" (when using veneers), has numerous advantages for the intended use here: it is light, so that the drive spindle and its bearings are relieved; it can be easily disposed of by incineration, with no harmful emissions; it dampens vibrations and thus relieves the user. Surprisingly, tests have shown that it has sufficient strength even at high flow forces. Of course, the metal surfaces to be machined are not damaged when they come into contact with the carrier.
  • the material in question is impregnated with the prepolymer, the end product preferably containing less than 10% by weight and particularly preferably about 5% by weight of phenolic resin.
  • This is a fundamental difference from ordinary plywood, which has been known for decades as a carrier for abrasive grain, cf. DE-A 10 34 350 as well as US 2,707,856 and US 2,288,625; in the case of plywood, alternating layers of veneer and glue, and there is no cross-linking of the wood layers during pressing, apart from the fact that deformation from the plane is hardly possible.
  • Phenolic resin is preferred as the synthetic resin binder because it is a relatively inexpensive thermoset. But that does not rule out the use of other synthetic resins. Lamellar supports made of phenolic resin alone, on the other hand, are unusable because their strength is not sufficient, apart from the fact that wood or, in particular, recycled paper are much cheaper. Plastics that are predominantly made of phenolic resin with small amounts of reinforcing material made of e.g. Cotton fabrics exist, are used as insulation material in electrical engineering, but would not be useful for the application in question here.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Laminated Bodies (AREA)

Claims (14)

  1. Outil abrasif constitué par un support en forme de disque pouvant être accouplé à un arbre d'entraînement et par des lamelles abrasives disposées en éventail, appliquées sur son bord, le support présentant un enfoncement central perforé, caractérisé en ce que le support est composé d'un matériau à base végétale stratifié dans le sens de l'épaisseur du disque qui est lié à l'aide d'une résine synthétique et dans lequel les couches sont réticulées ou feutrées entre elles.
  2. Outil abrasif selon la revendication 2, caractérisé en ce que le matériau stratifié comprend une ou plusieurs des matières suivantes : bois, papier, cellulose, fibres de coton, de chanvre, de lin, de ramie, de jute sous forme de tissu ou de non tissé.
  3. Outil abrasif selon la revendication 1 ou 2, caractérisé en ce que la résine synthétique liante est une résine d'urée, une résine époxydique, une résine phénolique, une résine de mélamine, une résine de polyester ou un mélange d'une ou de plusieurs des résines précitées.
  4. Outil abrasif selon l'une des revendications 1 à 3, caractérisé en ce que la fraction de résine synthétique du matériau de support se situe au-dessous de 10% en poids.
  5. Outil abrasif selon la revendication 4, caractérisé en ce que la fraction de résine synthétique du matériau de support se situe à environ 5% en poids.
  6. Procédé de fabrication d'un outil abrasif selon l'une des revendications 1 à 5, constitué par un support en forme de disque pouvant être accouplé à un arbre d'entraînement et par des lamelles abrasives disposées en éventail, appliquées sur son bord, le support présentant un enfoncement central perforé, caractérisé par les étapes suivantes :
    - imprégnation de placages de bois ou de bandes de papier à l'aide d'un prépolymère,
    - découpage à la dimension de pièces à partir de ce matériau avec des dimensions minimales qui dépassent le diamètre souhaité du disque,
    - introduction des pièces dans un moule,
    - pressage à chaud des pièces avec formage de l'enfoncement central, réticulation du matériau en bois ou en papier et polymérisation du prépolymère en vue de la liaison des couches de bois ou de papier, du matériau étant étiré vers l'intérieur à partir du bord des pièces,
    - découpage du support dans la zone comprimée avec centrage en ce qui concerne l'enfoncement et
    - perçage d'un trou central dans le support, centré par rapport à l'enfoncement, après quoi le support est tapissé par collage de lamelles abrasives du côté opposé à l'enfoncement.
  7. Procédé selon la revendication 6, caractérisé en ce qu'un prépolymère de résine phénolique est utilisé pour l'imprégnation.
  8. Procédé selon la revendication 6 ou 7, caractérisé en ce que du papier de recyclage est utilisé comme bande de papier.
  9. Procédé selon la revendication 6 ou 7, caractérisé en ce que les placages de bois possèdent une épaisseur de 0,3 à O,8 mm.
  10. Procédé selon l'une des revendications 6 à 9, caractérisé en ce que les bandes sont imprégnées à l'aide du prépolymère.
  11. Procédé selon l'une des revendications 6 à 10, caractérisé en ce que des pièces carrées sont découpées dans le matériau.
  12. Procédé selon l'une des revendications 6 à 11, caractérisé en ce que le pressage à chaud et l'estampage sont réalisés dans un outil commun.
  13. Procédé selon l'une des revendications 6 à 12, caractérisé en ce que le trou central est poinçonné dans le support.
  14. Utilisation d'une matière à mouler à partir d'un matériau à base végétale stratifié avec un liant à base de résine synthétique, préparée selon l'une des revendications 6 à 13, comme support pour des outils abrasifs garnis de lamelles abrasives selon l'une des revendications 1 à 5.
EP90116769A 1990-03-23 1990-08-31 Outil abrasif, procédé pour sa fabrication et utilisation d'un matériau spécial à cet effet Expired - Lifetime EP0447608B1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE4009342 1990-03-23
DE19904009342 DE4009342C2 (de) 1990-03-23 1990-03-23 Schleifwerkzeug
EP90111512A EP0447604A1 (fr) 1990-03-23 1990-06-19 Ponceuse
EP90111512 1990-06-19

Publications (2)

Publication Number Publication Date
EP0447608A1 EP0447608A1 (fr) 1991-09-25
EP0447608B1 true EP0447608B1 (fr) 1994-12-28

Family

ID=25891469

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90116769A Expired - Lifetime EP0447608B1 (fr) 1990-03-23 1990-08-31 Outil abrasif, procédé pour sa fabrication et utilisation d'un matériau spécial à cet effet

Country Status (5)

Country Link
EP (1) EP0447608B1 (fr)
AT (1) ATE116183T1 (fr)
DE (2) DE9017196U1 (fr)
DK (1) DK0447608T3 (fr)
ES (1) ES2066064T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4119295C2 (de) * 1991-06-12 1994-12-01 Frische Gmbh Umweltsicherer Verbundwerkstoff aus Naturfasern bzw. -produkten und Kunststoffen des Typs Polyurethan-Polyester und/oder Polyurethan-Polyamid sowie Verfahren zu dessen Herstellung
DE19511004C1 (de) * 1995-03-25 1996-09-19 Lukas Erzett Schleif Fraes Werkzeug mit einem Schleif- oder Polierbelag
DE19752815A1 (de) * 1997-11-28 1999-06-02 Siegfried Geisel Zerspanungswerkzeug
ITMI20061516A1 (it) * 2006-07-31 2008-02-01 Taf Abrasivi S P A Procedimento per la realizzazione di dischi abrasivi,nonche' dischi abrasivi ottenuti.
WO2012089610A1 (fr) * 2010-12-27 2012-07-05 Amanda Patent & Licensing Sia Dispositif de sablage
US20130344782A1 (en) * 2010-12-27 2013-12-26 Amanda Patent & Licensing Sia Sanding device
PL229192B1 (pl) 2015-11-27 2018-06-29 Rog Stanislaw Przed Pentar Talerzowa ściernica listkowa

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH95079A (de) * 1920-08-30 1922-06-01 Offermann Johann Verfahren zur Herstellung von Schleif- und Polierkörpern.
DD104747A1 (fr) * 1973-03-08 1974-03-20
US4230461A (en) * 1977-09-29 1980-10-28 Eli Sandman Company Abrasive wheels

Also Published As

Publication number Publication date
DE9017196U1 (de) 1991-03-14
ATE116183T1 (de) 1995-01-15
ES2066064T3 (es) 1995-03-01
EP0447608A1 (fr) 1991-09-25
DK0447608T3 (da) 1995-02-27
DE59008145D1 (de) 1995-02-09

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