EP0051720A2 - Procédé et moyen pour enlever les poussières de meulage d'une bande abrasive - Google Patents

Procédé et moyen pour enlever les poussières de meulage d'une bande abrasive Download PDF

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Publication number
EP0051720A2
EP0051720A2 EP81106619A EP81106619A EP0051720A2 EP 0051720 A2 EP0051720 A2 EP 0051720A2 EP 81106619 A EP81106619 A EP 81106619A EP 81106619 A EP81106619 A EP 81106619A EP 0051720 A2 EP0051720 A2 EP 0051720A2
Authority
EP
European Patent Office
Prior art keywords
shoe
grinding
sanding
profile piece
grinding shoe
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Withdrawn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
EP81106619A
Other languages
German (de)
English (en)
Other versions
EP0051720A3 (fr
Inventor
Giorgio Stefani
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0051720A2 publication Critical patent/EP0051720A2/fr
Publication of EP0051720A3 publication Critical patent/EP0051720A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • B24B53/00—Devices or means for dressing or conditioning abrasive surfaces
    • B24B53/10—Devices or means for dressing or conditioning abrasive surfaces of travelling flexible backings coated with abrasives; Cleaning of abrasive belts

Definitions

  • the above invention relates to a method and means for releasing an abrasive belt, which is mainly used in connection with a sleeping shoe which carries out a reciprocating or oscillating movement, from the grinding dust which has become lodged in the gaps between the abrasive cores.
  • edge sanders. and / or profile grinding machines which are equipped with one or more grinding shoes, which execute a reciprocating or oscillating movement, on the side of the grinding shoe facing the profile piece, an abrasive paper is provided, whereby between the workpiece to be ground and the Abrasive paper develops a lot of heat during the sanding process, which leads to damage to the sandpaper.
  • grinding dust settles very quickly between the grinding cores consists of wood dust, small wood shavings, small resin parts, paint particles or similar synthetic materials. This means that the sanding paper wears out quickly due to the sanding dust and resin deposits. These deposits very quickly form a layer that tends to cake, making the desired extraction of the grinding dust and resin particles impossible.
  • profile grinding machines with a reciprocating or oscillating grinding shoe have so far not been able to establish themselves on the market, although these machines basically have considerable advantages, such as. B. the limited manufacturing costs of the machine, the better adaptability to complicated profile pieces, as well as the ability to cheaply and quickly produce the necessary sanding shoes that are used for the numerous different wooden profiles.
  • the object of the above invention is to provide a method and a device with which it is possible to achieve the Avoid disadvantages inherent in the state of the art, and in particular excessive heating of the sandpaper and rapid wear of the sandpaper, due to caked-up deposits consisting of non-removed sanding dust and resin, and to ensure that the service life of the sandpaper is below the usually acceptable values decrease.
  • the air cushion which has formed between the grinding shoe and the surface to be ground is displaced to the outside at high speed during the return movement of the grinding shoe in the direction of the workpiece to be ground.
  • the result of this is that the air flow from the inside of the grinding shoe to its outside, with considerable energy content, with high pressure and very high speed.
  • the above invention further relates to the means necessary to carry out the method.
  • the means for carrying out the method are characterized in that the reciprocating sanding shoe is assigned a lifting device, and a compressed air source connected to lines and nozzles, which compressed air between the surface of the workpiece to be sanded and the lower surface consisting of sandpaper of the sanding pad.
  • the lines for the supply of Compressed air is arranged inside the grinding shoe, in which several secondary lines branch off from a main feed line.
  • the grinding shoe 1 is z. B. by two links 2 and 3, which perform a reciprocating or oscillating movement in the direction of arrow F with the aid of known drive devices. Furthermore, with the aid of known control cams or a cylinder piston unit (not shown), the grinding shoe 1 can be given a lifting movement or a lowering movement in the direction of the arrow G.
  • the sanding shoe 1 advantageously has an elastic layer 4, on which the sanding paper 5 is attached.
  • a line 8 is provided which is connected to a compressed air source, not shown.
  • the main line 8 for the supply of compressed air branches into individual secondary lines 8a, which emerge from the grinding shoe 1 in the area 6.
  • the sandpaper 5 has suitable passage openings 9. These openings 9 are distributed over the surface 6 of the grinding shoe 1 in such a way that these holes are always covered by the surface of the profile piece 7, so that an air cushion can be formed between the surface to be ground and the grinding shoe 1.
  • a grinding shoe 1 which corresponds to the grinding shoe according to Fig. 1 on the whole, only with the difference that for the generation of the air cushion, between the surface of the profile piece 7 to be ground and the lower surface 6 of the Sanding shoe 1, 4 none Compressed air supply channels 8, 8a in the interior of the grinding shoe 1 and no corresponding outlet openings 9 which penetrate the sanding paper 5 are provided.
  • nozzles 10 are provided to produce the air cushion, which are arranged near the lower edges of the grinding shoe 4. When the grinding shoe 4 is raised, these nozzles 10 blow compressed air between the surface of the profile piece to be ground and the lower surface 6 of the grinding shoe 4, in order to thus build up the desired air cushion between the workpiece and the grinding shoe.
  • the compressed air is supplied continuously or in a precisely controlled manner, depending on the lifting movements of the grinding shoe, using known control valves.
  • the Fi g. 4 a piece of sandpaper can be removed in the cut.
  • On the underside of the piece of paper 5 protrude abrasive grains 5a, which are firmly attached to the paper carrier using a glue layer 5b. Chip spaces, which are designated by 5c, are formed between the grinding cores 5a.
  • the grinding grains 5a are in contact with the surface of the profile piece 7 and, according to the grinding pressure P, are touched by the tips of the grinding grains 5a, representing the cutting edges, 7 fine chips removed from the profile piece, which are deposited in the form of grinding dust in the chip spaces 5c. If the chip spaces 5c are not freed from the deposited grinding dust in good time, the chip spaces 5c are completely filled with grinding dust, as is shown at 11 in FIG. 6. In this case, the cutting edges of the abrasive grains 5a no longer have the possibility of removing material from the profile piece 7, and furthermore the abrasive paper 5 heats up considerably, which results in the grinding dust and the enclosed resin particles becoming compacted and caked together. This will destroy the sandpaper within a few minutes.
  • a laterally open chamber 12 is formed between the surface of the profile piece 7 and the sanding paper 5.
  • an air cushion, designated 13 quickly builds up in the chamber 12.
  • the structure of the air cushion 13 in the chamber 12 and the abrupt and vigorous displacement of the air cushion in the direction of the outside of the grinding shoe 1, repeats itself cyclically, e.g. B. after every 10 or 20 reciprocating grinding movements (F) of the grinding shoe 1, which, in addition to a perfect cooling of the sanding paper 5, also ensures a perfect removal of the grinding dust.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Grinding-Machine Dressing And Accessory Apparatuses (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP81106619A 1980-11-12 1981-08-26 Procédé et moyen pour enlever les poussières de meulage d'une bande abrasive Withdrawn EP0051720A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT2591380 1980-11-12
IT25913/80A IT1134225B (it) 1980-11-12 1980-11-12 Procedimento e mezzi per liberare carta abrasiva dalla polvere di levigatura depositatasi

Publications (2)

Publication Number Publication Date
EP0051720A2 true EP0051720A2 (fr) 1982-05-19
EP0051720A3 EP0051720A3 (fr) 1983-04-20

Family

ID=11218126

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81106619A Withdrawn EP0051720A3 (fr) 1980-11-12 1981-08-26 Procédé et moyen pour enlever les poussières de meulage d'une bande abrasive

Country Status (4)

Country Link
EP (1) EP0051720A3 (fr)
JP (1) JPS57114364A (fr)
ES (1) ES8300036A1 (fr)
IT (1) IT1134225B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0412537A3 (en) * 1989-08-11 1991-04-24 Wacker-Chemitronic Gesellschaft Fuer Elektronik-Grundstoffe Mbh Process and device for the treatment of chemico-mechanical publishing fabrics, particularly for semiconductor wafers
AU705780B2 (en) * 1997-08-14 1999-06-03 Asahi Kasei Kogyo Kabushiki Kaisha Process and apparatus for treating development waste liquor

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2643181B2 (ja) * 1987-09-24 1997-08-20 トヨタ自動車株式会社 研削加工におけるクーラント供給方法および装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1099769B (de) * 1961-02-16 STRICO Gesellschaft für Metallurgie und Wärmetechnik m.b .H., Gummersbach (RhId.) Stoßbläser
US2646654A (en) * 1950-03-17 1953-07-28 Minnesota Mining & Mfg Device for dressing coated abrasive belts
CH302508A (de) * 1952-06-24 1954-10-31 Eisenhut Jacob Verfahren und Einrichtung zur Behandlung von luftdurchlässigen Gegenständen, wie Teppiche und Textilien, mit einem Mittel.
DE1037308B (de) * 1957-01-11 1958-08-21 Buetfering Maschfab Geb Vorrichtung zum Reinigen von Schleifbaendern
DE2402004A1 (de) * 1974-01-11 1975-07-24 Mach Bbs S A Maschine zum abrichten von werkstuecken mit zwei gegenueberliegenden oberflaechen

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0412537A3 (en) * 1989-08-11 1991-04-24 Wacker-Chemitronic Gesellschaft Fuer Elektronik-Grundstoffe Mbh Process and device for the treatment of chemico-mechanical publishing fabrics, particularly for semiconductor wafers
AU705780B2 (en) * 1997-08-14 1999-06-03 Asahi Kasei Kogyo Kabushiki Kaisha Process and apparatus for treating development waste liquor

Also Published As

Publication number Publication date
ES507546A0 (es) 1982-10-01
EP0051720A3 (fr) 1983-04-20
ES8300036A1 (es) 1982-10-01
IT8025913A0 (it) 1980-11-12
JPS57114364A (en) 1982-07-16
IT1134225B (it) 1986-08-13

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Effective date: 19831221