EP0147633B1 - Procédé de fabrication d'éléments abrasifs élastiques - Google Patents

Procédé de fabrication d'éléments abrasifs élastiques Download PDF

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Publication number
EP0147633B1
EP0147633B1 EP84114193A EP84114193A EP0147633B1 EP 0147633 B1 EP0147633 B1 EP 0147633B1 EP 84114193 A EP84114193 A EP 84114193A EP 84114193 A EP84114193 A EP 84114193A EP 0147633 B1 EP0147633 B1 EP 0147633B1
Authority
EP
European Patent Office
Prior art keywords
grinding
abrasive grain
base body
grinding bodies
recesses
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
Application number
EP84114193A
Other languages
German (de)
English (en)
Other versions
EP0147633A3 (en
EP0147633A2 (fr
Inventor
Anne-Marie Elbel-Raberain
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
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 filed Critical Dr Elbel Schleifmittel GmbH
Priority to AT84114193T priority Critical patent/ATE33107T1/de
Publication of EP0147633A2 publication Critical patent/EP0147633A2/fr
Publication of EP0147633A3 publication Critical patent/EP0147633A3/de
Application granted granted Critical
Publication of EP0147633B1 publication Critical patent/EP0147633B1/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
    • B24D11/00—Constructional features of flexible abrasive materials; Special features in the manufacture of such materials
    • B24D11/001—Manufacture of flexible abrasive materials
    • B24D11/005—Making abrasive webs

Definitions

  • the invention relates to a method for producing elastic grinding bodies for shape-following grinding, using a negative mold. which contain abrasive grain islands in their surface area, which are anchored in an elastomeric body.
  • Such grinding wheels are known from DE-OS 3 219 567.
  • binders are available for combination for the elastomeric base body and the abrasive grain islands, since “wet-on-wet” has to be used.
  • these mutually compatible binders must be coordinated with one another with regard to their pot and curing times and temperatures.
  • the grinding wheels produced with them represent only compromises that are difficult to optimize in terms of grinding performance.
  • the abrasive bodies produced by the previously known method have abrasive grain islands which are separated from one another by grooves. In grinding machines with a relatively low coolant supply, this can lead to the coolant "seeping away" in the grooves and thus not being able to fulfill its purpose, so that the grinding islands grind almost dry and soon become clogged.
  • this object is achieved by first producing the elastomeric base body with depressions in its surface by means of the negative shape, and then pouring out these depressions with an abrasive grain / binder mixture, so that the abrasive body is given a closed surface.
  • the abrasive body shown in section in FIGS. 1 and 2 consists of hard abrasive grain 11, which are embedded in an elastomer 12 and, if appropriate, a further layer 13 of fabric, in particular textile fiber fabric.
  • All known hard materials such as corundum, silicon carbide and other carbides, garnet, emery, glass powder, etc. can be used as the abrasive grain for the abrasive grain islands 11
  • Grinding aids such as pyrite, hollow corundum, marble powder, cryolite etc.
  • Suitable binders for these abrasive grain islands 11 are primarily liquid systems which can be poured in a mixture with the abrasive grain and possibly grinding aids, possibly under the action of vibration and / or heat, for example unsaturated polyester resins, epoxy resins, acrylic resins and their monomers Diisocyanate-hardened phenol novolaks, acid-hardening phenol resoles and many more
  • the thickness of the elastomer layer 12 is at least 5 mm, usually 15 to 30 mm, in each case the thickness of the grinding grain islands 11 is subtracted.
  • the thickness of the abrasive grain islands 11 is preferably 8 to 15 mm.
  • all elastomers can be used for the elastomeric base body 12, but primarily elastomeric foams which, for a short time, e.g. B. withstand a temperature of 130 ° for 30 min in order to harden the subsequently introduced abrasive grain binder composition.
  • Particularly suitable here are thermosetting polyurethane foams, elastomeric foams based on depolymerized butyl rubber or other liquid rubbers.
  • the elastomeric base body 12 is advantageously foamed directly onto a core 14 during its production and is thereby firmly connected to it. Practically all dimensionally stable materials can be used as materials for such cores. Aluminum is recommended if the core is to be reused. Cores 14 based on various plastics, for example hard polyurethane, epoxy or phenolic resins, are also recommended.
  • a first negative mold is made, Fig. 8, that of steel, aluminum. Wood, polyethylene or the like can exist. It corresponds to the flat development of the grinding wheel, the areas 24 projecting 10 to 17 mm from the base 22. If necessary, the shape another edge 23, which is at the same level as the bottom 22.
  • a positive mold is produced by casting. All relevant casting compounds are suitable as materials here. e.g. B. gypsum, liquid rubbers, polymer concrete, epoxy or unsaturated polyester resins.
  • a second negative mold is now cast from this positive mold, which consists primarily of silicone rubber. Other elastomers with their own release effect are also conceivable.
  • the second negative form is now inserted into a round form in such a way that the surface shown in FIG. 8 points inwards.
  • the core 14 can be inserted centrally in this form.
  • the elastomer is then poured into the space between the core 14 and the second negative mold on the outside and is cured or vulcanized, primarily with foaming.
  • a base body (second positive shape) is thus obtained, which consists of the core 14 and the elastomer layer 12, the latter having many pockets (corresponding to the areas 24 of the negative shape) according to FIGS. 3 to 6 or similar on its outside or outer surface.
  • an edge made of elastomer remains, about 5 to 10 mm wide, predetermined by the edge 23 (FIG. 8).
  • Such base bodies can be made in stock and later filled with an abrasive grain / binder mixture.
  • the base body consisting of 12 and 14, is placed on a shaft 15.
  • a band 17 is guided over the deflection roller 19 in the direction of rotation around the base body and finally attached to the roller 18 via a further deflection roller.
  • the band 17 can consist of film, siliconized paper or the like. The band must be guided tightly so that it is tight and tight over its full width. This can be achieved, for example, by braking the roller 16 while the roller 18 is driven.
  • the base body (12 + 14) sits on a funnel 20, which is optionally provided with a vibrator 21.
  • the still flowable abrasive grain binder mass is now placed in this funnel 20. Since the vibration of the funnel in the casting area is also transmitted to the base body, it is ensured that the depressions in the base body are filled without air pockets.
  • the depressions (pockets) in the base body are then gradually filled with the abrasive grain / binder mixture, while the belt 17 prevents this mass from subsequently flowing out again.
  • the funnel 20 is removed, the belt 17 is cut off on both sides and the two ends are connected to one another in such a way that the entire circumference of the grinding wheel now in place is tightly surrounded. Subsequently, the binder of the abrasive grain islands 11 is hardened and the grinding wheel is overturned for a perfect concentricity.
  • a structure of the grinding wheel surface is created as in FIG. 3.
  • the grinding wheel according to the invention and a method for its production have been described above using the exemplary embodiment of a wheel-shaped grinding wheel, but it is also possible, analogously, to produce grinding wheels in a different form, for example in the form of disks or plates.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Grinding Of Cylindrical And Plane Surfaces (AREA)

Claims (2)

1. Procédé pour fabriquer des meules élastiques pour le meulage en suivant la forme de la pièce, utilisant un moule négatif, lesquelles meules contiennent dans la zone de leur surface des îlots en grains abrasifs ancrés dans un corps de base élastomère, caractérisé en ce qu'on fabrique d'abord au moyen du moule négatif le corps de base élastomère (12) avec des cavités dans sa surface et qu'on coule ensuite dans ces cavités un mélange de liant et de grains abrasifs qui, une fois durci, constitue les îlots de grains abrasifs (11), de sorte qu'il en résulte pour la meule une surface fermée.
2. Procédé pour fabriquer des meules sous forme de roues selon la revendication 1, caractérisé en ce qu'on coule le mélange liant-grains abrasifs par en haut dans le corps de base (12) qui tourne autour d"un axe horizontal, et en ce que, immédiatement après la coulée, le mélange coulé est maintenu dans les cavités au moins jusqu'au durcissement par une bande (17) entourant le corps de base (12) sur sa périphérie.
EP84114193A 1983-12-24 1984-11-23 Procédé de fabrication d'éléments abrasifs élastiques Expired EP0147633B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84114193T ATE33107T1 (de) 1983-12-24 1984-11-23 Verfahren zur herstellung von elastischen schleifkoerpern.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3346916 1983-12-24
DE19833346916 DE3346916A1 (de) 1983-12-24 1983-12-24 Verfahren zur herstellung von elastischen schleifkoerpern

Publications (3)

Publication Number Publication Date
EP0147633A2 EP0147633A2 (fr) 1985-07-10
EP0147633A3 EP0147633A3 (en) 1986-08-27
EP0147633B1 true EP0147633B1 (fr) 1988-03-23

Family

ID=6218018

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84114193A Expired EP0147633B1 (fr) 1983-12-24 1984-11-23 Procédé de fabrication d'éléments abrasifs élastiques

Country Status (3)

Country Link
EP (1) EP0147633B1 (fr)
AT (1) ATE33107T1 (fr)
DE (2) DE3346916A1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6234762A (ja) * 1985-08-07 1987-02-14 Furukawa Electric Co Ltd:The 光コネクタ中子端面凸球面状研磨用研磨盤
ATE53324T1 (de) * 1986-04-17 1990-06-15 Carborundum Schleifmittel Verfahren zur herstellung eines elastischen schleifkoerpers.
GB8915449D0 (en) * 1989-07-06 1989-08-23 Unicorn Ind Plc Grinding tools
EP0812250B1 (fr) * 1995-02-27 2000-01-19 Sandro Giovanni Giuseppe Ferronato Element abrasif souple a moule permanent a usage unique, et son procede de fabrication
ITPC20010031A1 (it) * 2001-10-29 2003-04-29 Tullio Arcobello Utensile per lavori di sgrossatura di superfici, in particolare per pavimentazione.
FI121654B (sv) 2006-07-10 2011-02-28 Kwh Mirka Ab Oy Förfarande för tillverkning av en flexibel sliprondell och en flexibel sliprondell

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2032356A (en) * 1934-02-28 1936-03-03 William J Ellis Abrasive element
GB576757A (en) * 1944-04-28 1946-04-17 Nachmann Julius Slutzky Improvements in or relating to diamond tools
US3246430A (en) * 1963-04-25 1966-04-19 Rexall Drug Chemical Abrasive articles and methods of making the same
US3440773A (en) * 1966-08-26 1969-04-29 Norton Co Abrasive cutting device
US3902864A (en) * 1970-06-03 1975-09-02 Gen Dynamics Corp Composite material for making cutting and abrading tools
US3774355A (en) * 1971-10-15 1973-11-27 Remington Arms Co Inc Armored metal file band and production thereof
DE2256079C3 (de) * 1972-11-16 1981-10-08 Ted Bildplatten Ag Aeg-Telefunken-Teldec, 6301 Zug Verfahren zur Herstellung einer Diamantschleiffolie

Also Published As

Publication number Publication date
ATE33107T1 (de) 1988-04-15
DE3346916A1 (de) 1985-07-04
DE3470009D1 (en) 1988-04-28
EP0147633A3 (en) 1986-08-27
EP0147633A2 (fr) 1985-07-10

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