EP0178577A2 - Pièce de feutre en tant qu'outil technique ainsi que la méthode et le dispositif pour sa fabrication - Google Patents

Pièce de feutre en tant qu'outil technique ainsi que la méthode et le dispositif pour sa fabrication Download PDF

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Publication number
EP0178577A2
EP0178577A2 EP85112780A EP85112780A EP0178577A2 EP 0178577 A2 EP0178577 A2 EP 0178577A2 EP 85112780 A EP85112780 A EP 85112780A EP 85112780 A EP85112780 A EP 85112780A EP 0178577 A2 EP0178577 A2 EP 0178577A2
Authority
EP
European Patent Office
Prior art keywords
felt
felt body
ring
blank
working fluid
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Withdrawn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
EP85112780A
Other languages
German (de)
English (en)
Other versions
EP0178577A3 (fr
Inventor
Jack Brand
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.)
Brand Jack
Original Assignee
Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0178577A2 publication Critical patent/EP0178577A2/fr
Publication of EP0178577A3 publication Critical patent/EP0178577A3/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Withdrawn legal-status Critical Current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
    • 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
    • B24D13/12—Wheels having flexibly-acting working parts, e.g. buffing wheels; Mountings therefor acting by their periphery comprising assemblies of felted or spongy material, e.g. felt, steel wool, foamed latex
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/25—Web or sheet containing structurally defined element or component and including a second component containing structurally defined particles
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T442/00—Fabric [woven, knitted, or nonwoven textile or cloth, etc.]
    • Y10T442/50—FELT FABRIC
    • Y10T442/51—From natural organic fiber [e.g., wool, etc.]
    • Y10T442/53—Including particulate material other than fiber

Definitions

  • the invention relates to a felt body, in particular a felt ring as a technical aid for polishing and grinding work, and to a method and a device for the production thereof.
  • Felt disks or felt polishing bodies of the type mentioned at the outset are usually produced from piece felts, block felts, table felts or disk felts in various thicknesses from 1 mm to 150 mm with diameters from 1 mm to 1000 mm, either as rolled or as unwilled felts with spec. Weights together between 0.10 and 1.10 gr / cm 3 .
  • the field of use of such felt disks includes the grinding and polishing of glass, metals, stones, wood and plastic or the like, whereby abrasive grains, for example made of quartz, aluminum oxide or silicon carbide, are arranged in a pasty carrier bond between the felt disk and a workpiece to be machined.
  • abrasive grains for example made of quartz, aluminum oxide or silicon carbide
  • felt can only be used with those grinding or polishing pastes, i.e. after applying particles to the surface of the felt body; a firm integration of the abrasive grains into the felt is excluded; Experience has shown that this cannot hold the abrasive or polishing additives mentioned.
  • Solid grinding wheels are mainly used as grinding stones or slip rings made of ceramic materials, synthetic resins or rubber. Even the latter is attributable to the disadvantage of not being able to offer sufficient lubricity, especially when grinding glass.
  • the inventor has set itself the goal of creating a felt body of the type mentioned at the outset with improved usability in the grinding and polishing process, and methods and devices for its production.
  • the felt body contains at least 35 S of wool or the like. Hair elements and grinding or polishing grains with a grain size of up to 1000 ⁇ m are enclosed in cavities in its tangled felt.
  • the proportion of the raw material for the felt body which does not consist of wool or the like hair elements should preferably not be more than 20 percent by volume, and the grain size of the inclusions should be less than 250 ⁇ m.
  • a The preferred embodiment of the felt body, in particular for the glass industry, is a felt ring with the above properties.
  • a prerequisite for the production of the felt body according to the invention is the participation of hollow fibers with a rough, in particular scaly surface in the construction of a blank - sheep's wool or other animal hair is preferably used.
  • Non-hair fibers can, depending on the quality and spec.
  • the weight of the needle or whale felt produced fluctuate between 0% and 20%.
  • the abrasive grains are held by the wool parts - such as their scales - even if the larger part of the grain surface has already been released in the course of the grinding process. With conventional grindstones, the abrasive grain breaks out of the surrounding mass when only a small part of the surface has been removed. It is conceivable to use wool in the abrasive grain below the numbered limit of 35% of the felt body - however, these are then thrown out in the lower speed ranges. Also within the scope of the invention is the definition of larger grains z. B. up to 2500 microns - but these are mostly unsuitable for grinding and polishing processes, but can be used in spherical felt-like devices in spherical mill-like devices.
  • the grinding particles which are preferably made of cerium oxide, are stuck in cavities; during the below
  • the method according to the invention slides the abrasive particles into the cavities after those wool components or the like have been made temporarily pliable. After a drying process, the re-tensioned wool components lock in the abrasive particles.
  • the above-mentioned raw material from natural hair - possibly with a limited amount of foreign fibers added - covers about 10-95 , preferably 50-95% by weight of the finished felt body at average atmospheric humidity. Its specific weight is between 0.50 and 1.00 gr / cm 3 , optionally between 0.12 and 1.50 gr / cm 3 .
  • the felt body according to the invention has, as a percentage of the specific weight of the finished aid, 80 to 1%, in particular 35 to 1 ⁇ , polishing and grinding particles.
  • the process according to the invention is characterized in that abrasive grains - preferably cerium oxide for glass - with a concentration of up to 500 gr per liter of H 2 O, preferably 20 to 100 gr, are introduced in water in that this mixture is used as working fluid in a blank described embodiment according to the invention pressed and this felt body is then dried.
  • stiffening additives in a proportion up to 80%, preferably up to 40%, has proven to be favorable.
  • Particularly suitable for this purpose are water-soluble, thermoplastic additives with a dry content of 20 to 50% of polyvinyl or polyvinyl acetate dispersions, slightly viscous, non-ionic liquids with a pH between 3.5 and 6.0 and a specific weight of around 1.1 (20 ° C).
  • This stiffening additive appears on the finished product after drying at preferably 80 ° to 120 ° C. as a hard, transparent coating.
  • the working fluid (the felt, the higher the temperature the more dense) is used preferably 1 to 80 0 C, in beispeillust following compositions of this invention, each with one liter of water: cerium oxide (Ce 2 0 3) Additional
  • the working liquid is introduced into the blank preferably at 1 ° C. to 80 ° C. by means of a negative pressure applied to it, thanks to which the majority of the air present in the blank is extracted and can be replaced by penetrating abrasive grains.
  • the blank can be made up of predominantly nonionic, weakly anionic fatty acid ester compounds or the like for the absorption of the grinding or polishing particles to get prepared; these effect a surface smoothing of the fibers and their reshaping with increased moisture absorption.
  • a device for carrying out the connection of the felt body with the grinding and polishing particles consists of a liquid vessel for the working fluid, a holder for the felt body immersed therein and a delivery line for a flowing pressure medium; the latter is preferably designed as a suction pipe of a vacuum pump, the inner diameter of which is slightly longer than the diameter of the ring recess when producing a felt ring. This requirement ensures - in interaction with the other feature that a cover plate is provided for contact with the lower surface of the felt ring and the lower surface only lies in a negligible edge area - a particularly intensive suction effect and a wide path for the working fluid.
  • a device according to the invention with a stub shaft above a liquid container is used in particular for larger felt rings; here a dipping process is made possible during the rotation of the felt ring, the latter being in contact with a suction nozzle in the dipping bath.
  • the felt bodies are stacked in a pressure vessel, vented in this and then exposed to the working fluid under pressure.
  • a felt ring 11 of a height h of, for example, 35 mm with a diameter d of a central annular recess 12 of 110 mm and a wall thickness e of im selected embodiment 20 mm.
  • This felt ring 11 consists of a tangle of fibers - not shown clearly in the drawing - with a portion of natural hollow fibers to be discussed, which in turn - at least partially - delimit cavities in the tangle of fibers.
  • a cover disk 13 can be seen, which covers a lower ring surface 14 in a narrow edge zone 15 of width b.
  • the holding device for the preferably metallic cover plate 13 is not shown for reasons of clarity.
  • a working liquid Q which is located in the liquid container 10 and into which the felt ring 11 with the cover disk 13 is immersed, does not initially reach the inner surfaces 16 of the felt ring 11.
  • the cylindrical connecting piece 18 is connected to a vacuum pump, not shown in FIG. 1, when it is switched on, an air flow in the direction of the arrow x is produced.
  • Working fluid Q is drawn in through the felt ring 11 into the ring recess 12 by this air flow.
  • the result is a hard felt body with abrasive grains evenly distributed over the entire ring cross-section, which are firmly anchored in the felt ring 11 after a final treatment, so that the finished felt ring 11 is particularly well suited for wet polishing of glass edges, for example - thanks to the fixed abrasive grains on the one hand and the limited elasticity of the tangle on the other hand.
  • a dome-like deflector 6 is centered on the cover plate 13 and an insert 5 with a central suction opening 4, which is curved towards the cover plate 12, in the socket 18, thanks to which the passage of the working liquid Q through the felt ring 11 is almost radial to nozzle A is done.
  • the width of the suction opening 4 is designated k.
  • a pressure vessel is indicated at 20 in FIG. 2, in which several felt disks 21 are supported on a grating 22. Above that, a line 27 coming from a silo container 25 - for working fluid Q which can be checked by means of a fill level indicator 26 - opens with blocking members 28.
  • the line 31 of a vacuum pump 32 with an interposed separator 40 ends in the wall 29 near a pressure cover 30 of the pressure vessel 20.
  • a visual inspection 33, thermometer 35 and vacuum meter 36 are provided in line 31 in addition to blocking members 28.
  • separator 40 By means of the separator 40, residues of the working liquid Q are discharged from an air flow led through the line 31 - the separator 40 is connected to the silo container 25 via a line 41 and a vacuum trap 42 for their removal.
  • the felt disks 21 are inserted into the described device, then the pressure cover 30 is placed airtight.
  • the supply of the working liquid Q is terminated and the pressure cover 30 can be opened after the vacuum in the pressure vessel 20 has been released. Residual emptying at atmospheric pressure takes place via a blocking member 37 on the boiler bottom 38.
  • a of cerium or corresponding grinding provided articles can be those felt ring 11 according to Fig 3 through a liquid container 10 at a right angle moveable to the shaft axis stub shaft. 43 - in a here not shown Way -clamp.
  • the felt ring 11 is immersed up to a diving height q in the working liquid Q, which is forced through the ring cross section by suction from a flexible suction nozzle 18 f .
  • Blanks for felt rings 11 with a height h of, for example, 40 to 60 mm were produced from block felt. The following dimensions apply:
  • the spec. Weight was 0.48 to 0.68 gr / cm 3 .
  • the ring recess 12 was drilled in and the outer wall 19 of the felt ring 11 was sawn.
  • the working fluid Q used consisted of:
  • cerium oxide encompasses a mixture of high-quality cerium oxides, other oxides and additives which give a fast polishing agent with good miscibility and wetness distribution.
  • the following physical and chemical data apply:
  • the water was spun out in a centrifuge for about 60 seconds in order to accelerate subsequent drying.
  • the felt ring 11 was pressed to the finished thickness and subjected to a stiffening process by impregnating the pressed felt ring 11 with a stiffening additive mentioned above.
  • the suction capacity of the vacuum pump was in a range from 80 to 100 X vacuum suction power, while the working liquid Q was sucked through the felt ring 11; depending the lower the felt material, the lower the vacuum suction capacity had to be and the more Ce 2 0 3 was absorbed.
  • Both the suction time and the amount of working fluid Q from approx. 0.25 to 1 liter. depended on the density of the felt, the height h of the blank, the concentration of the working fluid Q and the strength of the vacuum suction power.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
EP85112780A 1984-10-19 1985-10-09 Pièce de feutre en tant qu'outil technique ainsi que la méthode et le dispositif pour sa fabrication Withdrawn EP0178577A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3438381 1984-10-19
DE19843438381 DE3438381A1 (de) 1984-10-19 1984-10-19 Filzkoerper als technisches hilfsmittel sowie verfahren und vorrichtung zu dessen herstellung

Publications (2)

Publication Number Publication Date
EP0178577A2 true EP0178577A2 (fr) 1986-04-23
EP0178577A3 EP0178577A3 (fr) 1988-09-14

Family

ID=6248329

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85112780A Withdrawn EP0178577A3 (fr) 1984-10-19 1985-10-09 Pièce de feutre en tant qu'outil technique ainsi que la méthode et le dispositif pour sa fabrication

Country Status (4)

Country Link
US (2) US4675244A (fr)
EP (1) EP0178577A3 (fr)
CN (1) CN85108273A (fr)
DE (1) DE3438381A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4109692A1 (de) * 1991-03-23 1992-09-24 Filzfabrik Schwabach Gmbh Verfahren zum herstellen von gewalktem filz
DE9417186U1 (de) * 1994-09-26 1994-12-22 Heinrich Lippert GmbH, 74925 Epfenbach Werkzeug für die mechanische Oberflächenbehandlung
US5989113A (en) * 1994-09-26 1999-11-23 Heinrich Lippert Gmbh Tool for mechanical surface treatment

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SG131737A1 (en) * 2001-03-28 2007-05-28 Disco Corp Polishing tool and polishing method and apparatus using same
CN117207090B (zh) * 2023-10-25 2026-04-10 白鸽磨料磨具有限公司 一种陶瓷砂轮渗蜡工艺

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR564197A (fr) * 1923-03-22 1923-12-22 Coton à polir
GB417085A (en) * 1933-11-11 1934-09-27 William Harland Mcgill Improvements relating to grindstones and processes of treating same
US2369462A (en) * 1941-01-22 1945-02-13 United Cotton Products Company Method and apparatus for manufacturing abrasive materials
US2335902A (en) * 1941-11-24 1943-12-07 Carborundum Co Abrasive article and manufacture
US2880080A (en) * 1955-11-07 1959-03-31 Minnesota Mining & Mfg Reinforced abrasive articles and intermediate products
FR1307038A (fr) * 1960-12-08 1962-10-19 Carborundum Co Tampon à gratter
US3171151A (en) * 1961-04-04 1965-03-02 Armour & Co Cleaning and polishing article
LU41866A1 (fr) * 1961-06-14 1962-08-13
US3533834A (en) * 1966-05-17 1970-10-13 Owens Corning Fiberglass Corp Method and apparatus for impregnating porous sheet material formed of fibrous material
JPS5227878B2 (fr) * 1973-03-20 1977-07-22
CH650440A5 (en) * 1981-02-16 1985-07-31 Studer Ag Fritz Process for producing a grinding wheel

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4109692A1 (de) * 1991-03-23 1992-09-24 Filzfabrik Schwabach Gmbh Verfahren zum herstellen von gewalktem filz
DE9417186U1 (de) * 1994-09-26 1994-12-22 Heinrich Lippert GmbH, 74925 Epfenbach Werkzeug für die mechanische Oberflächenbehandlung
US5989113A (en) * 1994-09-26 1999-11-23 Heinrich Lippert Gmbh Tool for mechanical surface treatment

Also Published As

Publication number Publication date
US4675244A (en) 1987-06-23
EP0178577A3 (fr) 1988-09-14
US4795663A (en) 1989-01-03
CN85108273A (zh) 1986-05-10
DE3438381A1 (de) 1986-04-24

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