EP0242410B1 - Method of manufacturing an elastic grinding body - Google Patents

Method of manufacturing an elastic grinding body Download PDF

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Publication number
EP0242410B1
EP0242410B1 EP86105309A EP86105309A EP0242410B1 EP 0242410 B1 EP0242410 B1 EP 0242410B1 EP 86105309 A EP86105309 A EP 86105309A EP 86105309 A EP86105309 A EP 86105309A EP 0242410 B1 EP0242410 B1 EP 0242410B1
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EP
European Patent Office
Prior art keywords
negative mould
layer
abrasive
recesses
carrier layer
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
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EP86105309A
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German (de)
French (fr)
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EP0242410A1 (en
Inventor
Karl Dr. Elbel
Gottfried Wachter
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CARBORUNDUM SCHLEIFMITTELWERKE GMBH
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Carborundum Schleifmittelwerke GmbH
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Priority to AT86105309T priority Critical patent/ATE53324T1/en
Priority to DE8686105309T priority patent/DE3671712D1/en
Priority to EP86105309A priority patent/EP0242410B1/en
Publication of EP0242410A1 publication Critical patent/EP0242410A1/en
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Publication of EP0242410B1 publication Critical patent/EP0242410B1/en
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    • 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

Definitions

  • the application relates to a method for producing an elastic grinding body for shape-following grinding, which consists of a carrier layer and an active grinding layer applied thereon, consisting of free-standing grinding knobs made of a binder-grinding grain mixture, using an inwardly directed ribs and which can be inserted into a hollow cylindrical support part Negative shape with recesses in between for producing the active grinding layer.
  • Abrasive bodies of the type mentioned are known, for example, from EP-A 95 055 and EP-A 114 280.
  • the abrasive bodies produced in this way have the disadvantage, among other things, that after the abrasive layer has worn out, the rest of the body (core with the elastomer layer lying thereon) has at least partially become unusable. It therefore follows that approximately 80 to 90 percent by weight of the abrasive is lost and must be disposed of in a corresponding landfill.
  • the object of the invention is therefore to provide a method and a device with which the abrasive article of this type, for example in accordance with EP-A 95 055, can both be produced more easily and better, and also restores the remaining article (core and elastomer layer) after the abrasive grain layer has worn out can be.
  • this object is achieved in that the hollow cylindrical support part with the negative shape is arranged over a cylindrical base body formed from a core and the carrier layer applied thereon, such that first the lower inner edge of the inner peripheral surface of the negative shape containing the inner edges of the ribs with the outer upper edge the carrier layer coincides that, starting with the depressions of the negative mold lying at the bottom, these are poured out with the binder-abrasive grain mixture, the negative mold being continuously or gradually lowered so far above the base body in accordance with the filling height that the filled depressions are removed from the peripheral surface the backing layer are sealed, and that after the binder, Schleifkom mixture has hardened, the supporting part with the negative shape is removed from the grinding-active layer produced in this way.
  • the idea of the invention therefore consists in the fact that the cores of the grinding wheels with the elastomer layer can be used several times, so that in addition to reducing the grinding costs, a lower environmental impact due to grinding wheel cores that can no longer be used is achieved.
  • the Schleifkom binder mixture is structurally viscous and is vibrated to pour out the depressions of the negative mold and is thereby liquefied, and it is further provided that.
  • a fabric covering is applied to the carrier layer.
  • the fabric covering can expediently consist of two coils of a tear-resistant, synthetic fabric, which is firmly connected to the base body with a suitable elastomeric binder. After the return of such a body with a worn abrasive layer, the outer of the two tissue wraps is sanded down, provided with a fresh tissue wrap and is then available for re-use with an abrasive grain layer.
  • the production of the abrasive grain layer can start from all known abrasive grain binder mixtures, for example also based on epoxy or polyester resin, but the use of an abrasive grain binder mixture according to EP-A 0 114 280 has proven to be particularly advantageous, which can be liquefied by vibration .
  • the active grinding layer can be up to 20 mm high, in contrast to the known methods mentioned above, more than doubling. This results in service lives that are at least the same as those achieved by the known conglomerate disks, but the latter are not only more complex to manufacture, but can also no longer be reapplied after the abrasive layer has worn out and are also not oil-resistant. This results in areas of application for the extraordinarily chemical and oil-resistant abrasive articles which have been produced according to the invention wherever grinding is carried out with 1, emulsions or semi-synthetic coolants.
  • the device according to the invention for carrying out this method essentially contains a vibrating table on which the base body can be clamped, a holding plate which can be placed and fixed on the base body from above, and a hollow cylindrical support part which has the negative shape with its inwardly directed ribs and recesses lying in between the base body can be pushed on.
  • the Schleifkom-binder mixture when grinding the support part, the Schleifkom-binder mixture can be poured into the recesses of the negative mold and liquefied with the help of the vibration table.
  • FIGS. 1 and 2 show an abrasive wheel as can be produced or regenerated by the method according to the invention. It is constructed in a wheel shape, its peripheral area is formed by the active grinding layer 11 in the form of grinding knobs which are completely separated from one another so that they move individually on the underlying carrier layer 12, which is formed from a solid or foamed elastomer, i.e. can adapt to the respective sanding surface. Between the backing layer 12 and the active grinding layer 11, a fabric layer 13 is provided, which can consist, for example, of two fabric rolls.
  • the inner part of the grinding wheel finally consists of a hard core 14 with a central bore 15.
  • the surface design i.e. the cross-sectional design of the grinding nubs of the grinding active layer 11 can be adapted to the particular application of the grinding wheel and, for example, have the shape indicated in FIGS. 3 to 6, the ratio of grinding nubs and interspaces being particularly important for the respective grinding task.
  • the basic idea of the method according to the invention is now not only to apply the outer active grinding layer 11, that is to say the grinding nubs, for the first time to the basic body consisting of carrier layer 12 and core 14, but also to apply it again and again to the basic body after its wear, that is to say a " To allow rounding "of the active grinding layer 11.
  • FIGS. 7-9 show the devices provided for carrying out this method; the method according to the invention is now explained with reference to these figures:
  • the basic body consisting of the core 14 with a bore 15 and the carrier layer 12 with the fabric layer 13, is produced by known methods, for example in accordance with the publications mentioned above, and does not need to be explained in particular.
  • a base body 16 (FIG. 7) is first produced from wood, metal, plastic or another suitable material, the surface design of which corresponds to or specifies the surface design of the later grinding-active layer 11, that is to say, for example, according to FIGS. 3-6 .
  • the knobs 11A of the base body 16 thus correspond in shape to the knobs of the active grinding layer 11.
  • This base body thus forms a positive mold that can be used again and again to cast an elastic negative mold 18 therefrom, for example silicone rubber being used as the material for the negative mold 18, which is poured into the space between the base body 16 and an outer annular support part 17 .
  • an elastic negative mold 18 for example silicone rubber being used as the material for the negative mold 18, which is poured into the space between the base body 16 and an outer annular support part 17 .
  • the support ring 17 is pulled off, the negative mold 18 is cut open at one point on its circumference and pulled off the positive mold (base body 16), after which the negative mold 18 is reinserted in the support ring 17 and is now formed to form a (new) active grinding layer on the base body 14 or the carrier layer 12 or the fabric pad 13 available.
  • a cylindrical body is thus obtained with inwardly directed ribs, which enclose depressions 11B between them, which define the later shape of the grinding knobs of the grinding-active layer 11.
  • the support part 17 and the negative mold 18 are fastened on a ring 24.
  • this ring 24 on the one hand, is aligned with the inner edges of the webs or ribs 11 C remaining between the depressions 11 B and, on the other hand, fits over the base body formed from core 14, carrier layer 12 and fabric cover 13 in the sense that the support part 17 made from negative mold 18 and retaining ring 24 unit formed can be pushed onto the base body.
  • the base body is clamped on the plate 22 of a vibration table with the aid of a bolt 19, nuts 21 and an auxiliary plate 20 which is guided through the bore 15.
  • the lower peripheral edge of the holding plate 20 corresponds to the upper edge of the negative mold 18, in addition, the holding plate 20 is frustoconical in such a way that a downwardly tapering, annular space is formed between the conical jacket and the negative mold 18, which in the positioning of the two shown in Figure 8 Aggregates allowed access to the bottom row of wells 11B.
  • the Schleifkom-binder mixture is now distributed and liquefied by vibration of the vibration table, so that the abrasive grain-binder mixture initially fills this lowermost row of the depressions 11B of the negative mold 18.
  • the negative mold 18 is now lowered with the support part 17, with further refilling of Schleifkom binder mixture 23 (FIG. 9) until all the depressions 11 B of the negative mold 18 are filled and these together with the ring 24 in the corresponding annular groove 24A of the table top 22 touches down.
  • the support part 17 is first removed and then the negative mold 18 is removed from the now finished abrasive body, in which the hardened Schleifkom binder mixture 23 then form the active grinding layer 11 of the finished abrasive body consisting of individual grinding knobs.
  • the outer layer of the fabric layer 13 can, for example, be sanded off, provided with a fresh tissue wrap, and the method can then be used repeatedly for re-application with an abrasive layer.

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

Abstract

1. Method of manufacturing a resilient grinding body for grinding in conformity with a particular configuration, which grinding body includes a carrier layer and an abrasive layer, which is applied to said carrier layer and is formed from free-standing abrasive knubs formed from a mixture of binding agent and abrasive grain, by the utilisation of a negative mould, which is insertable into a hollow-cylindrical supporting member and has inwardly orientated ribs and recesses interposed therebetween, for the production of the abrasive layer, characterised in that the hollow-cylindrical supporting member (17), together with the negative mould (18), is so disposed above a cylindrical basic body, formed from a core (14) and the carrier layer (12) applied to said core, that initially the lower internal edge of the internal circumferential face of the negative mould (18) containing the internal edges of the ribs (11C) coincides with the outer upper edge of the carrier layer (12), in that subsequently, commencing with the lowermost recesses (11B) of the negative mould (18), said recesses are filled with the mixture of binding agent and abrasive grain (23), whereby, depending on the level of filling, the negative mould (18) is continuously or stepwisely lowered over the basic body such that the filled recesses (11B) are sealed by the circumferential face of the carrier layer (12), and in that, after the mixture of binding agent and abrasive grain (23) has hardened, the supporting member (17) is removed, together with the negative mould (18), from the abrasive layer (11) which has thus been produced.

Description

Die Anmeldung betrifft ein Verfahren zur Herstellung eines elastischen Schleifkörpers zum formfolgenden Schleifen, der aus einer Trägerschicht und einer darauf aufgebrachten schleifaktiven Schicht aus freistehenden Schleifnoppen aus einem Bindemittel-Schleifkorn-Gemisch besteht, unter Verwendung einer in ein hohlzylindrisches Stützteil einlegbaren, nach innen gerichtete Rippen und dazwischen liegende Vertiefungen aufweisenden Negativform zur Erzeugung der schleifaktiven Schicht.The application relates to a method for producing an elastic grinding body for shape-following grinding, which consists of a carrier layer and an active grinding layer applied thereon, consisting of free-standing grinding knobs made of a binder-grinding grain mixture, using an inwardly directed ribs and which can be inserted into a hollow cylindrical support part Negative shape with recesses in between for producing the active grinding layer.

Schleifkörper der genannten Art sind beispielsweise aus der EP-A 95 055 und der EP-A 114 280 bekannt. Die derart hergestellten Schleifkörper haben unter anderem den Nachteil, daß nach Abnutzung der Schleifschicht der restliche Körper (Kern mit aufliegender Elastomerschicht) zumindest teilweise unbrauchbar geworden ist. Daraus folgt mithin, daß ca. 80 bis 90 Gewichtsprozent des Schleifmittels verloren sind und einer entsprechenden Deponie - zugeführt werden müssen. Diesen gravierenden Mangel haben auch die bisher verwendeten Schleifbänder und solche bekannten Schleifkörper für das formfolgende Schleifen, die hart gebundene Schleifkornkonglomerate in einer elastomeren Matrix eingebettet enthalten.Abrasive bodies of the type mentioned are known, for example, from EP-A 95 055 and EP-A 114 280. The abrasive bodies produced in this way have the disadvantage, among other things, that after the abrasive layer has worn out, the rest of the body (core with the elastomer layer lying thereon) has at least partially become unusable. It therefore follows that approximately 80 to 90 percent by weight of the abrasive is lost and must be disposed of in a corresponding landfill. The grinding belts used up to now and such known grinding bodies for shape-following grinding, which contain hard-bonded abrasive grain conglomerates embedded in an elastomeric matrix, also have this serious defect.

Aufgabe der Erfindung ist es daher, ein Verfahren und eine Vorrichtung anzugeben, mit dem der derartige Schleifkörper beispielsweise gemäß der EP-A 95 055 sowohl einfacher und besser hergestellt werden können, als auch Restkörper (Kern und Elastomerschicht) nach Abnutzung der Schleifkornschicht wieder neu belegt werden können.The object of the invention is therefore to provide a method and a device with which the abrasive article of this type, for example in accordance with EP-A 95 055, can both be produced more easily and better, and also restores the remaining article (core and elastomer layer) after the abrasive grain layer has worn out can be.

Erfindungsgemäß wird diese Aufgabe dadurch gelöst, daß das hohlzylindrische Stützteil mit der Negativform so über einem aus einem Kern und der auf diesem aufgebrachten Trägerschicht gebildeten zylindrischen Grundkörper angeordnet wird, daß zunächst die untere Innenkante der die Innenkanten der Rippen enthaltenden Innenumfangfläche der Negativform mit der äußeren Oberkante der Trägerschicht zusammenfällt, daß darauf beginnend mit den zuunterst liegenden Vertiefungen der Negativform, diese mit dem Bindemittel-Schleifkorn-Gemisch ausgegossen werden, wobei entsprechend der Füllhöhe die Negativform kontinuierlich oder schrittweise so weit über dem Grundkörper abgesenkt wird, daß die aufgefüllten Vertiefungen von der Umfangsfläche der Trägerschicht verschlossen werden, und daß nach Aushärtung des Bindemittel-, Schleifkom-Gemisches das Stützteil mit der Negativform von der derart erzeugten schleifaktiven Schicht abgenommen wird.According to the invention, this object is achieved in that the hollow cylindrical support part with the negative shape is arranged over a cylindrical base body formed from a core and the carrier layer applied thereon, such that first the lower inner edge of the inner peripheral surface of the negative shape containing the inner edges of the ribs with the outer upper edge the carrier layer coincides that, starting with the depressions of the negative mold lying at the bottom, these are poured out with the binder-abrasive grain mixture, the negative mold being continuously or gradually lowered so far above the base body in accordance with the filling height that the filled depressions are removed from the peripheral surface the backing layer are sealed, and that after the binder, Schleifkom mixture has hardened, the supporting part with the negative shape is removed from the grinding-active layer produced in this way.

Der Erfindungsgedanke besteht also darin, daß die Kerne der Schleifkörper mit der Elastomerschicht mehrfach verwendet werden können, so daß neben einer Reduzierung der Schleifkosten auch eine geringere Umweltbelastung durch nicht mehr verwendbare Schleifkörperkeme erreicht wird.The idea of the invention therefore consists in the fact that the cores of the grinding wheels with the elastomer layer can be used several times, so that in addition to reducing the grinding costs, a lower environmental impact due to grinding wheel cores that can no longer be used is achieved.

Gemäß einer vorteilhaften Ausgestaltung ist vorgesehen, daß das Schleifkom-Bindemittelgemisch strukturviskos ist und zum Ausgießen der Vertiefungen der Negativform in Vibration versetzt und dadurch verflüssigt wird, ferner ist vorgesehen, daß. vor der Befüllung mit dem Bindemittel-Schleifkorngemisch auf der Trägerschicht eine Gewebeauflage aufgebracht wird.According to an advantageous embodiment, it is provided that the Schleifkom binder mixture is structurally viscous and is vibrated to pour out the depressions of the negative mold and is thereby liquefied, and it is further provided that. Before filling with the binder-abrasive grain mixture, a fabric covering is applied to the carrier layer.

Die Gewebeauflage kann zweckmäßigerweise aus zwei Wickeln eines reißfesten, synthetischen Gewebes bestehen, das mit einem geeigneten elastomeren Bindemittel fest mit dem Grundkörper verbunden wird. Nach der Rückkehr eines solchen Körpers mit verbrauchter Schleifschicht wird der äußere der beiden Gewebewickel abgeschliffen, mit einem frischen Gewebewickel versehen und steht dann zur Neubelegung mit einer Schleifkornschicht zur Verfügung.The fabric covering can expediently consist of two coils of a tear-resistant, synthetic fabric, which is firmly connected to the base body with a suitable elastomeric binder. After the return of such a body with a worn abrasive layer, the outer of the two tissue wraps is sanded down, provided with a fresh tissue wrap and is then available for re-use with an abrasive grain layer.

Grundsätzlich kann die Herstellung der Schleifkornschicht von allen bekannten Schleifkorn-Bindemittelmischungen ausgehen, beispielweise auch auf Epoxid- oder Polyesterharz-Basis, besonders vorteilhaft erweist sich jedoch die Verwendung einer Schleifkorn-Bindemittelmischung gemäß der EP-A 0 114 280, die durch Vibration verflüssigt werden kann. Wegen der außerordentlich guten Haftfestigkeit dieser Bindung auf dem Gewebewickel kann die aktive Schleifschicht dabei bis über 20 mm hoch sein, im Gegensatz zu den oben genannten bekannten Verfahren mehr als eine Verdoppelung. Dadurch ergeben sich Standzeiten, die mindestens gleich sind denjenigen, wie sie von den bekannten Konglomeratscheiben erreicht werden, wobei letztere jedoch nicht nur in der Herstellung aufwendiger sind, sondern auch nach Abnutzung der Schleifschicht nicht mehr neu belegt werden können und außerdem nicht ölbeständig sind. Dadurch ergeben sich für die außerordentlich chemikalien- und ölbeständigen Schleifkörper, die erfindungsgemäß hergestellt wurden, auch dort Einsatzgebiete, wo mit 1, Emulsionen oder halbsynthetischen Kühlmitteln geschliffen wird.In principle, the production of the abrasive grain layer can start from all known abrasive grain binder mixtures, for example also based on epoxy or polyester resin, but the use of an abrasive grain binder mixture according to EP-A 0 114 280 has proven to be particularly advantageous, which can be liquefied by vibration . Because of the extraordinarily good adhesive strength of this bond on the fabric roll, the active grinding layer can be up to 20 mm high, in contrast to the known methods mentioned above, more than doubling. This results in service lives that are at least the same as those achieved by the known conglomerate disks, but the latter are not only more complex to manufacture, but can also no longer be reapplied after the abrasive layer has worn out and are also not oil-resistant. This results in areas of application for the extraordinarily chemical and oil-resistant abrasive articles which have been produced according to the invention wherever grinding is carried out with 1, emulsions or semi-synthetic coolants.

Darüberhinaus ist es möglich, beim erfindungsgemäßen Verfahren Hochdruckschmiermittel in die strukturviskose Schleifkorn-Bindemittelmischung zuzugeben, wodurch das Abgleiten der Metallspäne an den Schieifkomfiächen außerordentlich günstig beeinflußt wird, dies führt zu höheren Durchlaufgeschwindigkeiten bei den Schleifmaschinen und erhöht die Effizienz der erfindungsgemäß hergestellten Schleifkörper.In addition, it is possible in the process according to the invention to add high-pressure lubricants to the structurally viscous abrasive grain / binder mixture, which has an extremely favorable influence on the sliding of the metal chips on the grinding surfaces, which leads to higher throughput speeds in the grinding machines and increases the efficiency of the grinding bodies produced according to the invention.

Die erfindungsgemäße Vorrichtung zur Durchführung dieses Verfahrens enthält im wesentlichen einen Vibrationstisch, auf den der Grundkörper spannbar ist, eine von oben auf den Grundkörper aufsetzbare und fixierbare Halteplatte sowie ein hohlzylindrisches Stützteil, das mit der Negativform mit ihren nach innen gerichteten Rippen und dazwischen liegenden Vertiefungen auf den Grundkörper aufschiebbar ist.The device according to the invention for carrying out this method essentially contains a vibrating table on which the base body can be clamped, a holding plate which can be placed and fixed on the base body from above, and a hollow cylindrical support part which has the negative shape with its inwardly directed ribs and recesses lying in between the base body can be pushed on.

Mit Hilfe dieser Vorrichtung kann auf einfache Weise beim Absenken des Stützteils die Schleifkom-Bindemittelmischung in die Vertiefungen der Negativform eingefüllt und mit Hilfe des Vibrationstisches verflüssigt werden.With the help of this device, when grinding the support part, the Schleifkom-binder mixture can be poured into the recesses of the negative mold and liquefied with the help of the vibration table.

Ein Ausführungsbeispiel eines mit dem erfindungsgemäßen Herstellungsverfahren erzeugten Schleifkörpers und einer dazu verwendeten Vorrichtung wird anhand von Zeichnungen näher erläutert.An embodiment of a grinding wheel produced with the manufacturing method according to the invention and a pre-used for it Direction is explained in more detail with reference to drawings.

Es zeigen:

  • Figur 1: Einen Querschnitt durch den Schleifkörper in der Ebene A-B der Figur 2,
  • Figur 2: eine Hälfte des Schleifkörpers gemäß Figur 1 in der Seitenansicht,
  • Figuren 3-6: jeweils einen Ausschnitt aus Oberflächenansichten des Schleifkörpers gemäß den Figuren 1 und 2 mit verschiedener Gestaltung der schleifaktiven Oberfläche (Schleifnoppen).
Show it:
  • FIG. 1: a cross section through the grinding wheel in the plane AB of FIG. 2,
  • FIG. 2: a side view of one half of the grinding wheel according to FIG. 1,
  • FIGS. 3-6: a section of surface views of the grinding body according to FIGS. 1 and 2, each with a different design of the grinding-active surface (grinding knobs).

Die Figuren 1 und 2 zeigen einen Schleifkörper, wie er durch das erfindungsgemäße Verfahren herstellbar bzw. regenerierbar ist. Er ist radförmig aufgebaut, sein Umfangsbereich wird von der schleifaktiven Schicht 11 in Form von Schleifnoppen gebildet, die voneinander vollständig getrennt sind, so daß sie sich auf der darunter liegenden, aus einem massiven oder geschäumten Elastomer gebildeten Trägerschicht 12 individuell bewegen, d.h. dem jeweiligen Schleifuntergrund anpassen können. Zwischen Trägerschicht 12 und schleifaktiver Schicht 11 ist eine Gewebeschicht 13 vorgesehen, die beispielsweise aus zwei Gewebewickeln bestehen kann.FIGS. 1 and 2 show an abrasive wheel as can be produced or regenerated by the method according to the invention. It is constructed in a wheel shape, its peripheral area is formed by the active grinding layer 11 in the form of grinding knobs which are completely separated from one another so that they move individually on the underlying carrier layer 12, which is formed from a solid or foamed elastomer, i.e. can adapt to the respective sanding surface. Between the backing layer 12 and the active grinding layer 11, a fabric layer 13 is provided, which can consist, for example, of two fabric rolls.

Der innere Teil des Schleifkörpers besteht schließlich aus einem harten Kem 14 mit einer zentralen Bohrung 15.The inner part of the grinding wheel finally consists of a hard core 14 with a central bore 15.

Die Oberflächengestaltung, d.h. die Querschnittgestaltung der Schleifnoppen der schleifaktiven Schicht 11 kann auf den jeweiligen Anwendungszweck des Schleifrades abgestimmt sein und beispielsweise die in den Figuren 3 bis 6 angedeutete Gestalt haben, wobei insbesondere das Verhältnis von Schleifnoppen und Zwischenräumen für die jeweilige Schleifaufgabe von Bedeutung ist.The surface design, i.e. the cross-sectional design of the grinding nubs of the grinding active layer 11 can be adapted to the particular application of the grinding wheel and, for example, have the shape indicated in FIGS. 3 to 6, the ratio of grinding nubs and interspaces being particularly important for the respective grinding task.

Der Grundgedanke des erfindungsgemäßen Verfahrens besteht nun darin, die äußere schleifaktive Schicht 11, also die Schleifnoppen, nicht nur erstmalig auf den aus Trägerschicht 12 und Kem 14 bestehenden Grundkörper aufzubringen, sondern nach ihrer Abnutzung immer wieder neu auf den Grundkörper aufzubringen, also sozusagen eine "Rundemeuerung" der schleifaktiven Schicht 11 zu ermöglichen.The basic idea of the method according to the invention is now not only to apply the outer active grinding layer 11, that is to say the grinding nubs, for the first time to the basic body consisting of carrier layer 12 and core 14, but also to apply it again and again to the basic body after its wear, that is to say a " To allow rounding "of the active grinding layer 11.

Die Figuren 7-9 zeigen die zur Durchführung dieses Verfahrens vorgesehenen Vorrichtungen, unter Bezugnahme auf diese Figuren wird das erfindungsgemäße Verfahren nun erläutert:FIGS. 7-9 show the devices provided for carrying out this method; the method according to the invention is now explained with reference to these figures:

Die Herstellung des Grundkörpers, bestehend aus dem Kern 14 mit Bohrung 15 und der Trägerschicht 12 mit der Gewebeschicht 13 erfolgt nach bekannten Verfahren, beispielsweise gemäß den oben genannten Veröffentlichungen, und braucht nicht besonders erläutert zu werden.The basic body, consisting of the core 14 with a bore 15 and the carrier layer 12 with the fabric layer 13, is produced by known methods, for example in accordance with the publications mentioned above, and does not need to be explained in particular.

Zur Erzeugung der schleifaktiven Schicht 11 wird zunächst ein Grundkörper 16 (Figur 7) aus Holz, Metall, Kunststoff oder anderem geeigneten Material hergestellt, dessen Oberflächengestaltung der Oberflächengestaltung der späteren schleifaktiven Schicht 11 entspricht bzw. diese vorgibt, also beispielsweise entsprechend den Figuren 3-6. Den Schleifnoppen der schleifaktiven Schicht 11 entsprechen also formmäßig die Noppen 11A des Grundkörpers 16.To produce the grinding-active layer 11, a base body 16 (FIG. 7) is first produced from wood, metal, plastic or another suitable material, the surface design of which corresponds to or specifies the surface design of the later grinding-active layer 11, that is to say, for example, according to FIGS. 3-6 . The knobs 11A of the base body 16 thus correspond in shape to the knobs of the active grinding layer 11.

Dieser Grundkörper bildet also eine Positivform, die immer wieder benutzt werden kann, um daraus eine elastische Negativform 18 abzugießen, wobei beispielsweise Silikonkautschuk als Material für die Negativform 18 verwendet wird, der in den Zwischenraum zwischen dem Grundkörper 16 und einem äußeren ringförmigen Stützteil 17 ausgegossen wird.This base body thus forms a positive mold that can be used again and again to cast an elastic negative mold 18 therefrom, for example silicone rubber being used as the material for the negative mold 18, which is poured into the space between the base body 16 and an outer annular support part 17 .

Nach dem Aushärten der Negativform 18 wird der Stützring 17 abgezogen, die Negativform 18 wird an einer Stelle ihres Umfanges aufgeschnitten und von der Positivform (Grundkörper 16) abgezogen, danach wird die Negativform 18 wieder in den Stützring 17 eingesetzt und steht nun zur Bildung einer (neuen) schleifaktiven Schicht auf dem Grundkörper 14 bzw. der Trägerschicht 12 oder der Gewebeauflage 13 zur Verfügung.After the negative mold 18 has hardened, the support ring 17 is pulled off, the negative mold 18 is cut open at one point on its circumference and pulled off the positive mold (base body 16), after which the negative mold 18 is reinserted in the support ring 17 and is now formed to form a ( new) active grinding layer on the base body 14 or the carrier layer 12 or the fabric pad 13 available.

Man erhält also einen zylinderförmigen Körper mit nach innen gerichteten Rippen, die zwischen sich Vertiefungen 11B einschließen, die die spätere Form der Schleifnoppen der schleifaktiven Schicht 11 vorgeben. Das Stützteil 17 und die Negativform 18 sind auf einem Ring 24 befestigt.A cylindrical body is thus obtained with inwardly directed ribs, which enclose depressions 11B between them, which define the later shape of the grinding knobs of the grinding-active layer 11. The support part 17 and the negative mold 18 are fastened on a ring 24.

Die Innenumfangsfläche dieses Rings 24 fluchtet einerseits mit den Innenkanten der zwischen den Vertiefungen 11 B verbleibenden Stege oder Rippen 11 C und paßt andererseits über den aus Kem 14, Trägerschicht 12 und Gewebeauflage 13 gebildeten Grundkörper in dem Sinne, daß die aus Negativform 18, Stützteil 17 und Haltering 24 gebildete Einheit auf den Grundkörper aufschiebbar ist. Der Grundkörper ist mit Hilfe eines durch die Bohrung 15 geführten Bolzens 19, Muttern 21 und einer Hilfsplatte 20 auf der Platte 22 eines Vibrationstisches aufgespannt.The inner circumferential surface of this ring 24, on the one hand, is aligned with the inner edges of the webs or ribs 11 C remaining between the depressions 11 B and, on the other hand, fits over the base body formed from core 14, carrier layer 12 and fabric cover 13 in the sense that the support part 17 made from negative mold 18 and retaining ring 24 unit formed can be pushed onto the base body. The base body is clamped on the plate 22 of a vibration table with the aid of a bolt 19, nuts 21 and an auxiliary plate 20 which is guided through the bore 15.

Die untere Umfangskante der Halteplatte 20 entspricht dabei der Oberkante der Negativform 18, außerdem ist die Halteplatte 20 kegelstumpfförmig ausgebildet, derart, daß sich zwischen Kegelmantel und Negativform 18 ein nach unten verjüngender, ringförmiger Zwischenraum bildet, der in der in Figur 8 dargestellten Positionierung der beiden Aggregate den Zugang zu der untersten Reihe von Vertiefungen 11 B gestattet.The lower peripheral edge of the holding plate 20 corresponds to the upper edge of the negative mold 18, in addition, the holding plate 20 is frustoconical in such a way that a downwardly tapering, annular space is formed between the conical jacket and the negative mold 18, which in the positioning of the two shown in Figure 8 Aggregates allowed access to the bottom row of wells 11B.

In diesen Spalt zwischen der Hilfsplatte 20 und der Negativform 18 wird nun die Schleifkom-Bindemittelmischung verteilt und durch Vibration des Vibrationstisches verflüssigt, so daß die Schleifkorn-Bindemittelmischung zunächst diese unterste Reihe der Vertiefungen 11B der Negativform 18 ausfüllt. Nach und nach wird nun die Negativform 18 mit dem Stützteil 17 abgesenkt, unter weiterem Nachfüllen von Schleifkom-Bindemittelmischung 23 (Figur 9) bis alle Vertiefungen 11 B der Negativform 18 gefüllt sind und diese zusammen mit dem Ring 24 in der entsprechenden Ringnut 24A der Tischplatte 22 aufsetzt. Nach dem Aushärten der Schleifkom-Bindemittelmischung 23 wird zunächst das Stützteil 17 abgezogen und danach die Negativform 18 vom den nun fertigen Schleifkörper abgenommen, bei dem dann die erhärtete Schleifkom-Bindemittelmischung 23 die aus einzelnen Schleifnoppen bestehende schleifaktive Schicht 11 des fertigen Schleifkörpers bilden.In this gap between the auxiliary plate 20 and the negative mold 18, the Schleifkom-binder mixture is now distributed and liquefied by vibration of the vibration table, so that the abrasive grain-binder mixture initially fills this lowermost row of the depressions 11B of the negative mold 18. Gradually the negative mold 18 is now lowered with the support part 17, with further refilling of Schleifkom binder mixture 23 (FIG. 9) until all the depressions 11 B of the negative mold 18 are filled and these together with the ring 24 in the corresponding annular groove 24A of the table top 22 touches down. After the hardening of the Schleifkom binder mixture 23, the support part 17 is first removed and then the negative mold 18 is removed from the now finished abrasive body, in which the hardened Schleifkom binder mixture 23 then form the active grinding layer 11 of the finished abrasive body consisting of individual grinding knobs.

Nach der Abnutzung der schleifaktiven Schicht 11 kann dann beispielsweise die äußere Lage der Gewebeschichl13 abgeschliffen werden, mit einem frischen Gewebewickel versehen werden und das Verfahren kann dann wiederholt zur Neubelegung mit einer schleifaktiven Schicht angewendet werden.After the abrasion-active layer 11 has worn out, the outer layer of the fabric layer 13 can, for example, be sanded off, provided with a fresh tissue wrap, and the method can then be used repeatedly for re-application with an abrasive layer.

Claims (5)

1. Method of manufacturing a resilient grinding body for grinding in conformity with a particular configuration, which grinding body includes a carrier layer and an abrasive layer, which is applied to said carrier layer and is formed from free-standing abrasive knubs formed from a mixture of binding agent and abrasive grain, by the utilisation of a negative mould, which is insertable into a hollow-cylindrical supporting member and has inwardly orientated ribs and recesses interposed therebetween, for the production of the abrasive layer, characterised in that the hollow-cylindrical supporting member (17), together with the negative mould (18), is so disposed above a cylindrical basic body, formed from a core (14) and the carrier layer (12) applied to said core, that initially the lower internal edge of the internal circumferential face of the negative mould (18) containing the internal edges of the ribs (11 C) coincides with the outer upper edge of the carrier layer (12), in that subsequently, commencing with the lowermost recesses (11 B) of the negative mould (18), said recesses are filled with the mixture of binding agent and abrasive grain (23), whereby, depending on the level of filling, the negative mould (18) is continuously or stepwisely lowered over the basic body such that the filled recesses (11 B) are sealed by the circumferential face of the carrier layer (12), and in that, after the mixture of binding agent and abrasive grain (23) has hardened, the supporting member (17) is removed, together with the negative mould (18), from the abrasive layer (11) which has thus been produced.
2. Method according to claim 1, characterised in that the mixture of abrasive grain and binding agent (23) has a viscous structure and is set in vibration for the filling of the recesses (11B) of the negative mould (18) and is thereby liquefied.
3. Method according to claim 1, characterised in that a fabric layer (13) is applied to the carrier layer (12) prior to the filling with the mixture of abrasive grain and binding agent (23).
4. Apparatus for carrying out the method according to claims 2 and 3, characterised by a vibrating table (22), onto which the basic body is clampable, a retaining plate (20), which can be placed upon the basic body from above and is securable thereto, and a hollow-cylindrical supporting member (17) which can be slipped over the basic body together with the negative mould (18), which is provide;, with its inwardly orientated ribs (11 C) and recesses (11 B) interposed therebetween.
5. Apparatus according to claim 4, characterised in that the lower circumferential edge of the retaining plate (20) corresponds to the upper edge of the negative mould (18), and in that the retaining plate (20) has a frustoconical configuration, such that a downwardly tapering, annular space is formed between the conical surface and negative mould (18), which space is to be filled with the mixture of abrasive grain and binding agent (23).
EP86105309A 1986-04-17 1986-04-17 Method of manufacturing an elastic grinding body Expired - Lifetime EP0242410B1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AT86105309T ATE53324T1 (en) 1986-04-17 1986-04-17 PROCESS FOR MANUFACTURING AN ELASTIC ABRASIVE BODY.
DE8686105309T DE3671712D1 (en) 1986-04-17 1986-04-17 METHOD FOR PRODUCING AN ELASTIC GRINDING BODY.
EP86105309A EP0242410B1 (en) 1986-04-17 1986-04-17 Method of manufacturing an elastic grinding body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP86105309A EP0242410B1 (en) 1986-04-17 1986-04-17 Method of manufacturing an elastic grinding body

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EP0242410A1 EP0242410A1 (en) 1987-10-28
EP0242410B1 true EP0242410B1 (en) 1990-06-06

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EP (1) EP0242410B1 (en)
AT (1) ATE53324T1 (en)
DE (1) DE3671712D1 (en)

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CN105945738A (en) * 2016-05-05 2016-09-21 珠海市巨海科技有限公司 Resin binder grinding tool and manufacturing method thereof
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Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB498951A (en) * 1937-01-12 1939-01-17 Norton Grinding Wheel Co Ltd Composite grinding wheel and method of making the same
FR1142688A (en) * 1956-02-15 1957-09-20 Advanced abrasive tool and its manufacturing process
DE2341329A1 (en) * 1973-08-16 1975-03-13 Wilhelm H Spira Finish machining of toric faces - uses a plastic shell with toric working face selectively coated with working material
DE3219567A1 (en) * 1982-05-25 1983-12-01 SEA Schleifmittel Entwicklung Anwendung GmbH, 7530 Pforzheim ELASTIC GRINDING BODY AND METHOD FOR THE PRODUCTION THEREOF
DE3301925A1 (en) * 1983-01-21 1984-07-26 SEA Schleifmittel Entwicklung Anwendung GmbH, 7530 Pforzheim METHOD FOR PRODUCING ABRASIVE BODIES
DE3346916A1 (en) * 1983-12-24 1985-07-04 Elbel-Raberain, Anne-Marie, 7530 Pforzheim METHOD FOR PRODUCING ELASTIC GRINDING BODIES
US4523930A (en) * 1984-08-06 1985-06-18 Norton Company Method of manufacturing composite grinding wheel

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CN105729318A (en) * 2016-05-05 2016-07-06 珠海市巨海科技有限公司 Grinding wheel for polishing and grinding ceramic tile biscuit, manufacturing method of grinding wheel and polishing and grinding apparatus and polishing and grinding method for ceramic tile biscuit
CN105945738A (en) * 2016-05-05 2016-09-21 珠海市巨海科技有限公司 Resin binder grinding tool and manufacturing method thereof
CN111515872A (en) * 2020-04-10 2020-08-11 广东大市智能装备有限公司 Powder metallurgy integrated forming method for hollow diamond
CN111515872B (en) * 2020-04-10 2022-01-11 广东大市智能装备有限公司 Powder metallurgy integrated forming method for hollow diamond

Also Published As

Publication number Publication date
ATE53324T1 (en) 1990-06-15
EP0242410A1 (en) 1987-10-28
DE3671712D1 (en) 1990-07-12

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