EP1488888B2 - Dispositif intégrant un disque abrasif pour machine électroportative à meuler - Google Patents

Dispositif intégrant un disque abrasif pour machine électroportative à meuler Download PDF

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Publication number
EP1488888B2
EP1488888B2 EP04356090A EP04356090A EP1488888B2 EP 1488888 B2 EP1488888 B2 EP 1488888B2 EP 04356090 A EP04356090 A EP 04356090A EP 04356090 A EP04356090 A EP 04356090A EP 1488888 B2 EP1488888 B2 EP 1488888B2
Authority
EP
European Patent Office
Prior art keywords
abrasive
disk
perforations
micro
woven fabric
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
EP04356090A
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German (de)
English (en)
Other versions
EP1488888B1 (fr
EP1488888A1 (fr
Inventor
Marc Bottazzi
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.)
MBH Developpement SARL
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MBH Developpement SARL
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Application filed by MBH Developpement SARL filed Critical MBH Developpement SARL
Priority to DE602004012197T priority Critical patent/DE602004012197T3/de
Publication of EP1488888A1 publication Critical patent/EP1488888A1/fr
Publication of EP1488888B1 publication Critical patent/EP1488888B1/fr
Application granted granted Critical
Publication of EP1488888B2 publication Critical patent/EP1488888B2/fr
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Classifications

    • 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
    • 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
    • B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
    • B24B55/06—Dust extraction equipment on grinding or polishing machines
    • B24B55/10—Dust extraction equipment on grinding or polishing machines specially designed for portable grinding machines, e.g. hand-guided
    • 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
    • B24D13/147—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by the front face comprising assemblies of felted or spongy material; comprising pads surrounded by a flexible material

Definitions

  • the invention relates to the technical sector of portable grinding machines and abrasive discs adapted thereto.
  • the portable grinding machine to abrade, comprises, at the end of the driving part, a bell (1) with an axial opening for the passage of a drive shaft (not shown).
  • This bell has, on its periphery, a row of bristles (2) sealing bearing against the part of material to be grinded.
  • the bell has, on its rear face (1a), a conduit (1b) for attaching a suction hose, not shown, and projecting means (1c) for anchoring the power tool.
  • the bell receives a first subassembly (A) including a foam cake (3) and a disc (4) whose apparent face (4a) is made with self-gripping means of the type known under the trademark VELCRO, said apparent face constituting the male part of the binding.
  • A a first subassembly
  • the connection of the disk and the wafer is effected by a layer of adhesive (5) arranged regularly by interfacing between the disk and the wafer.
  • the second subassembly (B) which is attached and fixed on the first subassembly is constituted by the abrasive disc (6) itself which is also fixed by gluing (7) in a suitable layer on a disc (8) whose apparent face (8a) is constituted by self-gripping means of the VELCRO type constituting the female part of the fastener. Said portion (8a) is thus secured by hooking to the first subset (A) to the male portion (4a) formed on the disk (4).
  • the two subsets (AB) are thus inside the aforementioned bell.
  • the problem lies in the evacuation of the abrasive particles and materials that appear from the operation of the machine. Indeed, there is some difficulty in their evacuation, the adhesive layer (7) acting as a sealing barrier.
  • the aim sought, according to the invention, was therefore to remedy the aforementioned problem by seeking a simple solution to implement.
  • the device incorporates the characteristic of claim 1.
  • the invention aims to achieve, in a new way, the second subassembly that includes the abrasive disk.
  • This subset (C) comprises an abrasive disc portion (10), made of corundum or other materials, having on its abrasive surface (10a) a multitude of micro-perforations (10b).
  • This abrasive portion is secured by a layer of adhesive (11) to an underlying portion (12) made of nonwoven fabric having a certain thickness, serving as a means of filtration.
  • the micro perforations (10b) established on the abrasive part pass entirely through the adhesive layer (11) and open into the thickness (e) of the second part (12) of nonwoven fabric.
  • the micro-perforations (10b) established in the form of a punching of the abrasive surface, deform them and constitute suction air wells, the particles and dust necessarily passing through the wells.
  • the suction is stopped, the abraded particles fall naturally by the effect of gravity.
  • the evacuation of particles and dust, through the filter formed is by lateral suction from the design of the bell (1) associated with the power tool.
  • This particular arrangement thus allows a better management of the particles of the ground and abraded materials which thus pass through the layer of nonwoven fabric (12), acting as a filter, to be evacuated laterally by suction.
  • the layer of nonwoven fabric (12) is thus fixed and hooked with the self-gripping hook-shaped male part (4a) of the disc (4) associated with the foam cake (3) to ensure the maintenance of the whole .
  • the corundum abrasive is maintained by a impregnation of colloidal latex (10c) which is a very thin coating and whose property and function, besides maintaining the abrasive grains, is to slide the abraded particles more easily.
  • This impregnation (10c) thus constitutes an anti-fouling coating.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Magnetic Record Carriers (AREA)

Description

  • L'invention se rattache au secteur technique des machines portatives à meuler et aux disques abrasifs s'y adaptant.
  • Selon l'art antérieur, représenté figure 1, la machine portative à meuler, à abraser, comprend, en bout de la partie motrice, une cloche (1) avec une ouverture axiale pour le passage d'un axe d'entraînement (non représenté). Cette cloche présente, sur sa périphérie, une rangée de poils (2) d'étanchéité venant en appui sur la partie de matériau à meuler. La cloche présente, sur sa face arrière (1a), un conduit (1b) permettant la fixation d'un flexible d'aspiration, non représenté, et des moyens en saillies (1c) pour l'ancrage de la machine électroportative. La cloche reçoit un premier sous-ensemble (A) incluant une galette en mousse (3) et un disque (4) dont la face apparente (4a) est réalisée avec des moyens auto-agrippant du type de ceux connus sous la marque VELCRO, ladite face apparente constituant la partie mâle de la fixation. La liaison du disque et de la galette s'effectue par une couche de colle (5) disposée régulièrement en faisant interface entre le disque et la galette.
  • Le second sous-ensemble (B) qui est rapporté et fixé sur le premier sous-ensemble est constitué par le disque abrasif (6) lui-même qui est fixé également par collage (7) selon une couche appropriée sur un disque (8) dont la face apparente (8a) est constituée par des moyens auto-agrippant du type VELCRO en constituant la partie femelle de la fixation. Ladite partie (8a) vient ainsi se solidariser par accrochage au premier sous-ensemble (A) à la partie mâle (4a) formée sur le disque (4). Les deux sous-ensembles (A-B) se trouvent ainsi à l'intérieur de la cloche précitée. On a représenté, figure 1, cet ensemble, selon l'art antérieur.
  • Le problème posé réside dans l'évacuation des particules abrasives et des matières qui apparaissent de par le fonctionnement de la machine. On constate, en effet, une certaine difficulté à leur évacuation, la couche de colle (7) faisant office de barrière d'étanchéité.
  • On connaît, par le brevet EP n° 1.177.861 , le concept de réaliser des perforations sur une bande abrasive en continu, ces perforations étant établies sur une partie de l'épaisseur de la bande sans effet d'évacuation des particules abrasives, les conditions d'intervention étant différentes de l'objet de l'invention.
  • On connaît par le brevet US 5 810 650 un disque abrasif selon le préambule de la revendication 1.
  • Le but recherché, selon l'invention, était donc de remédier au problème posé précité en recherchant une solution simple à mettre en oeuvre.
  • Selon une première caractéristique, le dispositif intègre la caractéristique de la revendication 1.
  • Ces caractéristiques et d'autres encore ressortiront bien de la suite de la description.
  • Pour fixer l'objet de l'invention illustré d'une manière non limitative aux figures des dessins où :
    • la figure 1 est une vue, selon l'art antérieur, d'un ensemble d'une cloche adaptable sur machine électroportative à meuler ou à abraser incluant le disque abrasif.
    • la figure 2 est une vue des composants, selon l'invention, adaptables de la cloche précitée.
    • la figure 3 est une vue en coupe selon la figure 2, ligne A.A de celle-ci.
    • la figure 4 est une vue partielle à grande échelle illustrant la partie discale abrasive.
    • la figure 5 est une vue partielle en coupe illustrant l'évacuation des particules.
  • Afin de rendre plus concret l'objet de l'invention, on le décrit maintenant d'une manière non limitative illustrée aux figures des dessins.
  • L'invention vise à réaliser, de manière nouvelle, le deuxième sous-ensemble qui inclut le disque abrasif.
  • Ce sous-ensemble (C) comprend une partie discale abrasive (10), constituée en corindon ou autres matériaux, présentant sur sa surface abrasive (10a) une multitude de micro-perforations (10b). Cette partie abrasive est solidarisée par une couche de colle (11) à une partie sous-jacente (12) réalisée en tissu non tissé présentant une certaine épaisseur, faisant office de moyen de filtration. Les micros perforations (10b) établies sur la partie abrasive, traversent intégralement la couche de colle (11) et débouchent dans l'épaisseur (e) de la partie seconde (12) en tissu non tissé.
  • En outre, et comme représenté figure 5, les micros perforations (10b), établies sous forme d'un poinçonnage de la surface abrasive, déforment celles-ci et constituent des puits d'air d'aspiration, les particules et poussières passant obligatoirement par les puits. Lorsque l'aspiration est arrêtée, les particules abrasées tombent naturellement par l'effet de la pesanteur. Ainsi, par cette structure, l'évacuation des particules et poussière, à travers le filtre constitué, se fait par aspiration latérale de par la conception de la cloche (1) associée à la machine électroportative.
  • Cette disposition particulière permet ainsi une meilleure prise en charge des particules des matières meulées et abrasées qui traversent ainsi la couche de tissu non tissé (12), faisant office de filtre, pour être évacuées latéralement par aspiration. La couche de tissu non tissé (12) est ainsi fixée et accrochée avec la partie mâle (4a) auto-agrippante en forme de crochets du disque (4) associé à la galette (3) en mousse pour assurer le maintien de l'ensemble.
  • Selon une disposition avantageuse, représentée figure 4, l'abrasif en corindon est maintenu par une imprégnation de latex colloïdal (10c) qui constitue un enduit très fin et dont la propriété et fonction, outre de maintenir les grains abrasifs, est de faire glisser plus facilement les particules abrasées. Cette imprégnation (10c) constitue ainsi un enduit anti-encrassant.
  • Par la disposition nouvelle et originale de l'invention, outre la meilleure évacuation des particules des matières abrasées et meulées, on a constaté une plus grande longévité du disque abrasif (10) lui-même. La profondeur des ouvertures formées par les micros perforations (10b) dans la partie disque abrasive permet une aération complète du sous-ensemble (c) et donc évite un encrassage de la partie abrasive (10) elle-même, permettant ainsi une plus grande longévité.
  • Les avantages ressortent bien de l'invention. On souligne la simplicité de celle-ci et sa mise en oeuvre rapide et la meilleure qualité de l'aspiration des particules et une grande longévité améliorée du disque abrasif.

Claims (1)

  1. Dispositif intégrant un disque abrasif pour machine électroportative à meuler du type comprenant une partie discale abrasive (10) présentant sur sa surface abrasive (10a) une multitude de micro-perforations (10b), ladite partie abrasive étant solidarisée par une couche de colle (11) à une partie sous-jacente (12) réalisée en tissu non tissé, faisant office de moyen de filtration, les autres micro-perforations traversant intégralement la couche de colle et débouchant dans l'épaisseur de la partie seconde (12) en tissu non tissé, l'ensemble permettant la diffusion et évacuation des particules des matières meulées et abrasées, caractérisé en ce que le dispositif intègre le disque abrasif dans la partie intérieure d'une cloche (1) solidaire de ladite machine électroportative, ladite cloche recevant un premier sous-ensemble (A) incluant une galette en mousse et un disque (4) dont la face apparente est réalisée avec des moyens auto-agrippant et constituant la partie mâle de la fixation, une couche de colle (5) assurant la liaison du disque (4) et de la galette,
    en ce que la couche de tissu non tissé (12) constituant la partie femelle de la fixation se fixe et s'accroche à la partie mâle (4a) auto-agrippante en forme de crochets du disque (4) associé à la galette (3) pour assurer le maintien de l'ensemble,
    et en ce que le dispositif autorise l'évacuation latérale des poussières,
    et en ce que l'abrasif en corindon est maintenu par une imprégnation en latex colloïdal (10c) qui constitue un enduit très fin et qui, outre la fonction de maintenir les grains abrasifs, autorise le glissement des particules abrasées,
    et en ce que les micro-perforations (10b) établies sous forme d'un poinçonnage de la surface abrasive déforment celles-ci et constituent des puits d'air d'aspiration.
EP04356090A 2003-06-16 2004-06-08 Dispositif intégrant un disque abrasif pour machine électroportative à meuler Expired - Lifetime EP1488888B2 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE602004012197T DE602004012197T3 (de) 2003-06-16 2004-06-08 Vorrichtung einschließlich Schleifscheibe für elektrische Handschleifmaschine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0307396A FR2856323B1 (fr) 2003-06-16 2003-06-16 Disque abrasif pour machine electroportative a meuler
FR0307396 2003-06-16

Publications (3)

Publication Number Publication Date
EP1488888A1 EP1488888A1 (fr) 2004-12-22
EP1488888B1 EP1488888B1 (fr) 2008-03-05
EP1488888B2 true EP1488888B2 (fr) 2011-03-02

Family

ID=33396803

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04356090A Expired - Lifetime EP1488888B2 (fr) 2003-06-16 2004-06-08 Dispositif intégrant un disque abrasif pour machine électroportative à meuler

Country Status (5)

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EP (1) EP1488888B2 (fr)
AT (1) ATE387988T1 (fr)
DE (1) DE602004012197T3 (fr)
ES (1) ES2300725T5 (fr)
FR (1) FR2856323B1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MX2007007980A (es) 2004-12-30 2007-08-22 3M Innovative Properties Co Articulo abrasivo y metodos para fabricar el mismo.
US7252694B2 (en) 2005-08-05 2007-08-07 3M Innovative Properties Company Abrasive article and methods of making same
US7258705B2 (en) 2005-08-05 2007-08-21 3M Innovative Properties Company Abrasive article and methods of making same
US7393269B2 (en) * 2005-09-16 2008-07-01 3M Innovative Properties Company Abrasive filter assembly and methods of making same
US7390244B2 (en) 2005-09-16 2008-06-24 3M Innovative Properties Company Abrasive article mounting assembly and methods of making same
US7244170B2 (en) 2005-09-16 2007-07-17 3M Innovative Properties Co. Abrasive article and methods of making same
US7338355B2 (en) 2006-06-13 2008-03-04 3M Innovative Properties Company Abrasive article and methods of making and using the same
DK177694B1 (da) * 2012-12-04 2014-03-10 Poul Erik Jespersen Kadicma Værktøj med roterende bearbejdningsenhed

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4287685A (en) * 1978-12-08 1981-09-08 Miksa Marton Pad assembly for vacuum rotary sander
DE29520566U1 (de) * 1995-12-29 1996-02-22 Jöst, Peter, 69518 Abtsteinach Direkt oder indirekt mit einer Maschine oder einem manuell betreibbaren Schleifmittelhalter adaptierbarer Schleifkörper sowie ein hierfür geeigneter Adapter

Also Published As

Publication number Publication date
DE602004012197D1 (de) 2008-04-17
EP1488888B1 (fr) 2008-03-05
FR2856323B1 (fr) 2007-03-23
DE602004012197T3 (de) 2011-07-28
ATE387988T1 (de) 2008-03-15
DE602004012197T2 (de) 2009-03-19
EP1488888A1 (fr) 2004-12-22
ES2300725T3 (es) 2008-06-16
ES2300725T5 (es) 2011-05-03
FR2856323A1 (fr) 2004-12-24

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