EP1476045B1 - Grinding device for machining the ends of bristle filaments of toothbrushes - Google Patents

Grinding device for machining the ends of bristle filaments of toothbrushes Download PDF

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Publication number
EP1476045B1
EP1476045B1 EP02787856A EP02787856A EP1476045B1 EP 1476045 B1 EP1476045 B1 EP 1476045B1 EP 02787856 A EP02787856 A EP 02787856A EP 02787856 A EP02787856 A EP 02787856A EP 1476045 B1 EP1476045 B1 EP 1476045B1
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EP
European Patent Office
Prior art keywords
abrasive
grinding
bristle
tracks
conformed
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EP02787856A
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German (de)
French (fr)
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EP1476045A1 (en
Inventor
Michael Vankov
Bernd Stein
Christian Stief
Michael Machlitt
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Braun GmbH
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Braun GmbH
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    • A—HUMAN NECESSITIES
    • A46—BRUSHWARE
    • A46D—MANUFACTURE OF BRUSHES
    • A46D9/00—Machines for finishing brushes
    • A46D9/02—Cutting; Trimming

Definitions

  • the invention relates to a grinding device for processing the ends of bristle filaments of toothbrushes according to the preamble of patent claim 1.
  • a grinding device for processing the ends of bristle filaments is already known in which an abrasive surface is formed on an outwardly curved disk on the outer surface against which the ends of the bristle tufts are pressed. As the disc rotates, the tufts pass transversely past the disc. With a rotating disk and with continuous bristle tufts, their ends are pressed against the grinding surface. The tufts are rounded by the roughness of the grinding surface of this or otherwise mechanically processed.
  • the various grinding operations are carried out here in successively arranged grinding units. Such an arrangement is complicated and expensive because the tufts must be transported after the first rounding process by means of conveyors for the next grinding process. Such a device also requires a lot of parking space.
  • a grinding device for processing the ends of bristle filaments of toothbrushes of the type described above in which this consists of a drum, on whose peripheral outer surface the grinding surface is formed.
  • two different sanding surfaces are provided on the peripheral surface, the first sanding surface forming a rotationally extending strip-like path interrupted by a second sanding surface formed in the form of protrusions or webs extending transversely of the first sanding surface.
  • the second abrasive surface serves to roughen the adjacent surfaces of the bristle ends by rounding off the ends of the bristles, so as to achieve an enlargement of the cleaning active surface.
  • the front ends and the lateral surfaces of the bristles are alternately machined in a grinding process, and this in one revolution as often as many projections and web portions are formed on the peripheral grinding surface of the disc.
  • the object of the invention is therefore to improve a grinding device according to the preamble of claim 1 such that with simple means several grinding operations can be performed faster in a simple manner.
  • the grinding device should Furthermore, it can be achieved that a rounding of complex bristle topographies can be adapted more accurately to a grinding process.
  • the grinding device should be simple, time and space saving as well as inexpensive than conventional grinding equipment.
  • Such a grinding device requires much less space, saves resources and shortens the grinding time per toothbrush, since the bristle tufts to be processed do not have to be brought to different grinding wheels at different grinding operations. This reduces the cycle time of the grinding operations.
  • a grinding wheel is preferably provided with two slideways, with the two grinding operations can be performed temporally next to each other or sequentially.
  • three, four or even more sanding paths can be formed on the grinding wheel if a corresponding number of sanding operations are to be carried out and if the space on the sanding surface is large enough to accommodate the bristles or tufts.
  • the diameter of the grinding wheel must be adapted to the sliding tracks accordingly.
  • the advantage is achieved that, the larger the diameter of the grinding wheel, on the outer circumference much higher friction rates arise and therefore there also much more effective with coarser wheel surfaces the toothbrush side bristle filaments can be edited.
  • finer grinding operations to be machined such as polishing, can then be carried out because of the lower friction speeds.
  • a round grinding wheel with circular and annular grinding tracks has proven to be a particularly inexpensive to produce grinding wheel.
  • the grinding surface of the disc formed by a frustoconical surface or a cone, this also again different pressures can be achieved due to the different heights of the sliding tracks relative to the toothbrush side ends of the bristle filaments.
  • the inclination of the disc must be matched to the grinding surface, and the grinding speed and the material of the bristle filaments.
  • the grinder In Schleifbwegungen the grinder must not only rotate about its own axis, namely, they can also perform tumbling rotational movements, so that the pressure force of the disc to the bristle ends constantly changes and thereby act the frictional forces of radial tangential direction on the tufts. This improves the rounding of the bristle ends. Also, the rotation of the friction disc from left to right can be changed constantly, which also accommodates a better rounding. A combination of all these properties leads to the optimal rounding technique.
  • the device consists of a band on which a plurality of sliding tracks are formed side by side.
  • This embodiment has the advantage that the friction speeds on all tracks are equal, since the diameter remains constant. If the circulating belt runs inclined to the tuft axis, the contact pressures on the ends of the bristle filaments can also be changed here.
  • the grinding device 1 consists of a grinding carrier 2, on whose surface 3 formed as a carrier surface an abrasive layer 5 provided with grinding elements 4 is formed.
  • the abrasive layer 5 is shown enlarged in its thickness in the drawings, for better illustration.
  • the abrasive layer 5 consists here of two sliding tracks 6, 7, the grinding surfaces 8, 9 adjoin the line 10.
  • the grinding surface 8 is annular to the grinding surface 9, which is included as a circle of the grinding surface 8.
  • the transition of the grinding surface 9 to the grinding surface 8 is virtually seamless on the line 10 over.
  • Abrasive surfaces 8, 9 lie here in a horizontal plane.
  • the grinding surface 8 extends according to a section of a crescent, although a semicircle is formed in the middle, so that the remainder occupies the grinding surface 9 of half a circular ring on the overall round grinding layer 5.
  • the grinding surfaces 8, 9 are in a horizontal plane.
  • FIGS. 5 and 6 are the grinding surfaces 8, 9 seen in plan view as in Fig. 1 educated. But they are proceeding according to Fig. 6 sloping towards the middle 11 out, so that their lateral surfaces forms a common conical surface.
  • the grinding surfaces according to FIGS. 7 and 8 essentially correspond to those according to Fig. 1 and 2
  • a step 12 is formed, so that the grinding surface 9 is lower than the grinding surface 8. It is also conceivable to let the step 12 project upwards, so that then the grinding surface 9 would lie above the grinding surface 8. It is also conceivable that instead of the step 12, an inclined ramp is formed, so that the transition is continuous. Also, the step 12 may be formed by a radius to make the transition steady.
  • a bristle tuft 13 is in Fig. 2
  • the bristle tufts 13 consist of individual in the longitudinal direction of the bristle tufts 13 extending bristle filaments 15. Once the ends 14 of the bristle tufts 13 have been sufficiently processed with the grinding surface 8, either the bristle tufts 13 radially inwardly on the second grinding surface 9 are brought or the grinding carrier 2 is moved to the right until the ends 14 of the bristle tufts 13 come to lie on the radially inner surface 9 in order to be processed there. In this case, for example, the rotational speed of the grinding device 1 can be increased or decreased in order to achieve the desired abrasion at the ends 14 of the bristle tufts 13.
  • the grinding device 1 causes this here must be rotated about its axis 11, when the bristle tufts 13 to remain on only one grinding surface 8 or 9.
  • the bristle tufts 13 may be aligned so that they are parallel to the center 11, ie, the ends 14 of the bristle tufts 13 are obliquely ground or rounded.
  • the grinding device 1 allows the transition of the ends 14 of the bristle tufts 13 from the outer grinding surface 8 on the inner grinding surface 9 a pressure reduction, so that they are pressed with less force against the surface 9. This is particularly advantageous if the grinding surface 9 is to serve as a polishing surface.

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  • Brushes (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

An abrasive device includes at least two abrasive tracks disposed on a support portion, the abrasive tracks having abrasive surfaces with abrasive elements. The abrasive device may be used to perform various abrasive processes either consecutively or in parallel by means of different abrasive surfaces.

Description

Die Erfindung betrifft eine Schleifeinrichtung zum Bearbeiten der Enden von Borstenfilamenten von Zahnbürsten gemäß dem Oberbegriff des Patentanspruchs 1.The invention relates to a grinding device for processing the ends of bristle filaments of toothbrushes according to the preamble of patent claim 1.

Aus der US 3,451,173 A ist bereits eine Schleifeinrichtung zum Bearbeiten der Enden von Borstenfilamenten bekannt, bei der auf einer nach außen gewölbten Scheibe an der Außenfläche eine Schleifoberfläche ausgebildet ist, gegen die die Enden der Borstenbüschel gedrückt werden. Während die Scheibe rotiert, laufen die Büschel quer an der Scheibe vorbei. Bei rotierender Scheibe und bei kontinuierlich vorbeilaufenden Borstenbüscheln werden deren Enden gegen die Schleifoberfläche angedrückt. Dabei werden die Büschelenden durch die Rauhigkeit der Schleifoberfläche an dieser verrundet oder sonstwie mechanisch bearbeitet. Die verschiedenen Schleifvorgänge werden hier in hintereinander angeordneten Schleifeinheiten durchgeführt. Eine derartige Anordnung ist aufwendig und teuer weil die Büschel jeweils nach dem ersten Verrundungsvorgang mittels Fördereinrichtungen zum nächsten Schleifvorgang transportiert werden müssen. Eine derartige Einrichtung benötigt auch viel Stellraum.From the US 3,451,173 A For example, a grinding device for processing the ends of bristle filaments is already known in which an abrasive surface is formed on an outwardly curved disk on the outer surface against which the ends of the bristle tufts are pressed. As the disc rotates, the tufts pass transversely past the disc. With a rotating disk and with continuous bristle tufts, their ends are pressed against the grinding surface. The tufts are rounded by the roughness of the grinding surface of this or otherwise mechanically processed. The various grinding operations are carried out here in successively arranged grinding units. Such an arrangement is complicated and expensive because the tufts must be transported after the first rounding process by means of conveyors for the next grinding process. Such a device also requires a lot of parking space.

Aus der DE-198 48 221 A1 ist weiterhin eine Schleifeinrichtung zum Bearbeiten der Enden von Borstenfilamenten von Zahnbürsten der eingangs beschriebenen Art bekannt, bei der diese aus einer Trommel besteht, an deren umfangsseitiger Außenfläche die Schleifoberfläche ausgebildet ist. Bei dieser Ausführungsform sind an der umfangsseitigen Mantelfläche zwei unterschiedliche Schleifoberflächen vorhanden, wobei die erste Schleifoberfläche eine in Drehrichtung verlaufende, streifenförmige Bahn bildet, die durch eine zweite Schleifoberfläche, welche in Form von quer zur ersten Schleifoberfläche verlaufenden Vorsprünge oder Stege gebildet ist, unterbrochen sind. Die zweite Schleifoberfläche dient dazu, während des Abrundens der Borstenenden durch die erste Schleifoberfläche auch deren direkt benachbarte Mantelflächen etwas aufrauhen, um dadurch eine Vergrößerung der putzaktiven Oberfläche zu erzielen. Bei dieser Schleifscheibe werden also in einem Schleifvorgang abwechselnd die stirnseitigen Enden und die Mantelflächen der Borsten bearbeitet, und dies bei einer Umdrehung so oft, wie viele Vorsprünge und Bahnabschnitte an der umfangsseitigen Schleifoberfläche der Scheibe ausgebildet sind.From the DE-198 48 221 A1 Furthermore, a grinding device for processing the ends of bristle filaments of toothbrushes of the type described above is known in which this consists of a drum, on whose peripheral outer surface the grinding surface is formed. In this embodiment, two different sanding surfaces are provided on the peripheral surface, the first sanding surface forming a rotationally extending strip-like path interrupted by a second sanding surface formed in the form of protrusions or webs extending transversely of the first sanding surface. The second abrasive surface serves to roughen the adjacent surfaces of the bristle ends by rounding off the ends of the bristles, so as to achieve an enlargement of the cleaning active surface. In this grinding wheel, therefore, the front ends and the lateral surfaces of the bristles are alternately machined in a grinding process, and this in one revolution as often as many projections and web portions are formed on the peripheral grinding surface of the disc.

Aufgabe der Erfindung ist es nun, eine Schleifeinrichtung gemäß dem Oberbegriff des Patentanspruchs 1 derart zu verbessern, daß mit einfachen Mitteln mehrere Schleifvorgänge auf einfache Weise schneller durchgeführt werden können. Mit der Schleifeinrichtung soll weiterhin erreicht werden, daß eine Verrundung von komplexen Borstentopographien exakter an einen Schleifvorgang angepaßt werden kann. Des weiteren soll die Schleifeinrichtung einfach, zeit- und raumsparend sowie kostengünstig als herkömmliche Schleifeinrichtungen sein.The object of the invention is therefore to improve a grinding device according to the preamble of claim 1 such that with simple means several grinding operations can be performed faster in a simple manner. With the grinding device should Furthermore, it can be achieved that a rounding of complex bristle topographies can be adapted more accurately to a grinding process. Furthermore, the grinding device should be simple, time and space saving as well as inexpensive than conventional grinding equipment.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Patentanspruchs 1 gelöst. Durch das Aufbringen von mehreren Schleifbahnen auf einer Schleifoberfläche mit unterschiedlichen Schleifelementen ist es möglich, bereits nach Durchführung des ersten Schleifvorganges auf der ersten Schleifoberfläche durch geringe Wegverschiebung der Borstenbüschel gegenüber der Schleifoberfläche bzw. der Schleifscheibe gegenüber der Bostenbüschel oder beider auf die zweite Schleifoberfläche zu gelangen und bereits den zweiten Schleifvorgang durchzuführen. Dabei sind die Schleifbahnen so ausgerichtet, daß sie in Bewegungsrichtung der Schleifscheibe und/oder der Borstenbüschelenden verlaufen.This object is achieved by the characterizing features of claim 1. By applying a plurality of sanding paths on a grinding surface with different grinding elements, it is possible to achieve after passing the first grinding process on the first grinding surface by small displacement of the bristle tufts against the grinding surface or the grinding wheel opposite the Bostenbüschel or both on the second grinding surface and already carry out the second grinding process. The sliding tracks are aligned so that they run in the direction of movement of the grinding wheel and / or the bristle tufts ends.

So können also auf besonders kostengünstige Weise mehrere Schleifvorgänge auf einer einzigen Schleifvorrichtung durchgeführt werden, indem beispielsweise im ersten Arbeitsgang die Borstenenden grob geschliffen, im zweiten Arbeitsgang fein geschliffen, im dritten Arbeitsgang feinst geschliffen und eventuell im vierten Arbeitsgang noch poliert werden. Dabei müßten dann allerdings auf der Scheibe vier Schleifbahnen ausgebildet sein, die abwechselnd nach Durchführung des vorherigen Schleifvorgangs nacheinander abgetastet werden. Es ist aber auch durchaus denkbar, einige Schleifbahnen zu überspringen, wenn beispielsweise die inneren Borstenbüschel einer Zahnbürste nicht die hohe Oberflächengüte benötigen, wie dies an den randseitigen Borstenbüschelenden der Fall ist.Thus, several grinding operations can be performed on a single grinding device in a particularly cost-effective manner, for example, the bristle ends coarsely ground in the first operation, finely ground in the second operation, finely ground in the third operation and possibly polished in the fourth operation. In this case, however, four slideways would then have to be formed on the disk, which are scanned alternately after carrying out the previous grinding operation successively. But it is also conceivable to skip some slideways, for example, if the inner bristle tufts of a toothbrush do not require the high surface quality, as is the case on the marginal bristle tufts.

Eine derartige Schleifeinrichtung benötigt wesentlich weniger Platz, erspart Betriebsmittel und verkürzt die Schleifzeit pro Zahnbürste, da die zu bearbeitenden Borstenbüschel nicht bei unterschiedlichen Schleifvorgängen zu unterschiedlichen Schleifscheiben gebracht werden müssen. Dies reduziert die Taktzeit der Schleifvorgänge.Such a grinding device requires much less space, saves resources and shortens the grinding time per toothbrush, since the bristle tufts to be processed do not have to be brought to different grinding wheels at different grinding operations. This reduces the cycle time of the grinding operations.

Durch die Merkmale des Patentanspruchs 2 sind die einzelnen Schleifoberflächen deutlich voneinander getrennt, was auch zur deutlichen Trennung der Schleifvorgänge führt. Es ergibt sich aber auch noch der Vorteil, daß, wenn die Enden der Borstenfilamente in einer Ebene verlaufen, beim Übergang von der einen Schleifoberfläche zur anderen Schleifoberfläche der Andruck der Enden der Borstenfilamente an die Reibscheiben oder Reibbänder im zweiten Schleifvorgang automatisch entsprechend der Ausbildung der Abstufung zurückgenommen oder verstärkt wird, weil der Abstand der zahnputzseitigen Enden der Borstenfilamente zu der zweiten Schleifoberfläche größer bzw. kleiner geworden ist als der Abstand zu der ersten Schleifoberfläche. Auf diese Weise können kostspielige Andrückvorrichtungen für die Borstenfilamente entbehrlich sein, was den Werkzeugaufwand, den Verschleiß und sonstige Kosten reduziert. Bei einer rundumlaufenden Scheibe ist es von Vorteil, wenn die Stufen radial zum Zentrum der Scheibe verlaufen.Due to the features of claim 2, the individual grinding surfaces are clearly separated, which also leads to the significant separation of the grinding operations. However, there is also the advantage that, when the ends of the bristle filaments run in a plane, in the transition from one grinding surface to the other grinding surface of the pressure of the ends of the bristle filaments to the friction discs or friction bands in the second grinding automatically according to the formation of the gradation is withdrawn or reinforced, because the distance of the toothbrush side ends of the bristle filaments to the second abrasive surface has become larger or smaller than the distance to the first abrasive surface. In this way, costly pressing devices for the bristle filaments can be dispensed with, which reduces the tooling, wear and other costs. With a circular disk, it is advantageous if the steps run radially to the center of the disk.

Gleiches kann durch die Merkmale des Patentanspruchs 3 erzielt werden, wobei dann mindestens eine Schleifbahn geneigt oder gewölbt verläuft. Dabei können auch mehrere Schleifoberflächen geneigt oder gewölbt verlaufen, ohne daß dabei eine Stufe gebildet wird. Durch die Neigung können aber auch schräg zu den Borstenfilamenten verlaufende Reibflächen entstehen. Verlaufen die Borsten senkrecht zur ersten Schleifoberfläche, so wird automatisch der Anpreßdruck von der ersten zur zweiten Schleifoberfläche verringert, wenn die zweite Schleifoberfläche geneigt zu den Borstenbüscheln verläuft. Dies kann beim anschließenden Poliervorgang von Vorteil sein.The same can be achieved by the features of claim 3, wherein then at least one slideway is inclined or curved. In this case, a plurality of grinding surfaces inclined or curved run, without causing a step is formed. Due to the inclination but can also obliquely to the bristle filaments extending friction surfaces arise. If the bristles are perpendicular to the first abrasive surface, the contact pressure from the first to the second abrasive surface is automatically reduced when the second abrasive surface is inclined to the bristle tufts. This can be advantageous in the subsequent polishing process.

Durch die Merkmale des Patentanspruchs 4 entstehen mittels unterschiedlicher Korngrößen, unterschiedlichen Materials oder unterschiedlicher Form unterschiedliche Schleifoberflächen auf den verschiedenen Schleifbahnen. Durch den Einsatz unterschiedlicher Reibelemente können nebeneinander oder nacheinander verschiedene Schleifvorgänge durchgeführt werden.By the features of claim 4 arise by means of different grain sizes, different material or different shape different grinding surfaces on the different slideways. By using different friction elements, different grinding operations can be carried out side by side or in succession.

Durch die Merkmale des Patentanspruchs 5 wird vorzugsweise eine Schleifscheibe mit zwei Schleifbahnen geschaffen, mit der zwei Schleifvorgänge zeitlich nebeneinander oder nacheinander durchgeführt werden können. Es können aber auf der Schleifscheibe auch drei, vier oder noch mehr Schleifbahnen ausgebildet sein, wenn entsprechend viele Schleifvorgänge durchgeführt werden sollen und wenn dazu der Platz auf der Schleifoberfläche großgenug ist, die Borsten bzw. Büschel aufzunehmen. Dabei muß dann der Durchmesser der Schleifscheibe den Schleifbahnen entsprechend angepaßt werden. Hierdurch wird auch der Vorteil erreicht, daß, je größer der Durchmesser der Schleifscheibe ist, am äußeren Umfang wesentlich höhere Reibgeschwindigkeiten entstehen und daher auch dort wesentlich effektvoller mit gröberen Scheibenoberflächen die zahnputzseitigen Borstenfilamente bearbeitet werden können. Im Inneren der Schleifscheibe, wo die Durchmesser verhältnismäßig klein sind, können dann aufgrund der geringeren Reibgeschwindigkeiten feiner zu bearbeitende Schleifvorgänge, wie Polieren, durchgeführt werden. Eine runde Schleifscheibe mit kreis- und kreisringförmigen Schleifbahnen hat sich dabei als eine besonders preisgünstig herzustellende Schleifscheibe erwiesen.By the features of claim 5, a grinding wheel is preferably provided with two slideways, with the two grinding operations can be performed temporally next to each other or sequentially. However, three, four or even more sanding paths can be formed on the grinding wheel if a corresponding number of sanding operations are to be carried out and if the space on the sanding surface is large enough to accommodate the bristles or tufts. In this case, then the diameter of the grinding wheel must be adapted to the sliding tracks accordingly. In this way, the advantage is achieved that, the larger the diameter of the grinding wheel, on the outer circumference much higher friction rates arise and therefore there also much more effective with coarser wheel surfaces the toothbrush side bristle filaments can be edited. Inside the grinding wheel, where the diameters are relatively small, finer grinding operations to be machined, such as polishing, can then be carried out because of the lower friction speeds. A round grinding wheel with circular and annular grinding tracks has proven to be a particularly inexpensive to produce grinding wheel.

Wird gemäß den Merkmalen des Patentanspruchs 6 die Schleifoberfläche der Scheibe von einer Kegelstumpffläche oder einem Kegel gebildet, können auch hierdurch wieder aufgrund der unterschiedlichen Höhen der Schleifbahnen gegenüber den zahnputzseitigen Enden der Borstenfilamente unterschiedliche Andrücke erreicht werden. Die Neigung der Scheibe muß jeweils auf die Schleifoberfläche, und die Schleifgeschwindigkeit sowie das Material der Borstenfilamente abgestimmt sein.If according to the features of claim 6, the grinding surface of the disc formed by a frustoconical surface or a cone, this also again different pressures can be achieved due to the different heights of the sliding tracks relative to the toothbrush side ends of the bristle filaments. The inclination of the disc must be matched to the grinding surface, and the grinding speed and the material of the bristle filaments.

Bei den Schleifbwegungen muß sich die Schleifeinrichtung nicht nur um die eigene Achse drehen, sie kann nämlich auch taumelnde Drehbewegungen durchführen, so daß die Andruckkraft der Scheibe an die Borstenenden sich ständig ändert und dabei die Reibkräfte von radialer in tangentialer Richtung auf die Büschelenden einwirken. Dies verbessert die Verrundung der Borstenenden. Auch kann die Drehung der Reibscheibe von Linkslauf nach Rechtslauf ständig verändert werden, was ebenfalls einer besseren Verrundung entgegenkommt. Eine Kombination aller dieser genannten Eigenschaften führt zur optimalen Verrundungstechnik.In Schleifbwegungen the grinder must not only rotate about its own axis, namely, they can also perform tumbling rotational movements, so that the pressure force of the disc to the bristle ends constantly changes and thereby act the frictional forces of radial tangential direction on the tufts. This improves the rounding of the bristle ends. Also, the rotation of the friction disc from left to right can be changed constantly, which also accommodates a better rounding. A combination of all these properties leads to the optimal rounding technique.

Gemäß den Merkmalen des Patentanspruchs 7 besteht die Vorrichtung aus einem Band, auf dem mehrere Schleifbahnen nebeneinander ausgebildet sind. Diese Ausführungsform hat den Vorteil, daß die Reibgeschwindigkeiten auf allen Schleifbahnen gleich groß sind, da der Durchmesser konstant bleibt. Verläuft dabei das umlaufende Band geneigt zu der Büschelachse, so können auch hier die Anpreßdrücke auf die Enden der Borstenfilamente verändert werden.According to the features of claim 7, the device consists of a band on which a plurality of sliding tracks are formed side by side. This embodiment has the advantage that the friction speeds on all tracks are equal, since the diameter remains constant. If the circulating belt runs inclined to the tuft axis, the contact pressures on the ends of the bristle filaments can also be changed here.

Bei der Ausführungsform nach den Merkmalen des Patentanspruchs 8 ist es auch denkbar, daß die Umdrehungsgeschwindigkeit beim Wechsel auf eine andere Schleifbahn geändert wird, um optimale Schleifvorgänge an den Borstenfilamentenden zu erreichen.In the embodiment according to the features of claim 8, it is also conceivable that the rotational speed is changed when changing to another grinding track in order to achieve optimum grinding operations on the bristle filament ends.

Zwei Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im folgenden näher beschrieben. Es zeigen:

Fig. 1
eine schematisch dargestellte Draufsicht auf eine kreisförmige Schleifoberfläche einer Schleifscheibe mit zwei Schleifbahnen gemäß der Erfindung in verkleinertem Maßstab, wobei die Schleifoberflächen in einer Ebene liegen,
Fig. 2
einen Schnitt durch die Mitte der Schleifoberfläche nach Fig. 1, wobei allerdings der Querschnitt der Schleifoberfläche vergrößert dargestellt ist und der Grundkörper nur ausschnittsweise dargestellt ist,
Fig. 3
eine schematisch dargestellte Draufsicht auf eine kreisförmige Schleifoberfläche eines zweiten Ausführungsbeispiels gemäß der Erfindung, wobei die einzelnen Schleifbahnen nicht umlaufend sondern quergeteilt auf der Schleifscheibe angeordnet sind,
Fig. 4
wie gemäß Fig. 2, allerdings geht hier der Mittenschnitt durch die Scheibe gemäß Fig. 3,
Fig. 5
eine schematisch dargestellte Draufsicht auf ein drittes Ausführungsbeispiel einer kreisförmigen Schleifoberfläche einer Schleifscheibe mit zwei Schleifbahnen, wobei die Oberfläche der Scheibe zum Mittelpunkt hin geneigt ist,
Fig. 6
wie gemäß Fig. 2, allerdings geht hier der Mittenschnitt durch die Scheibe gemäß Fig. 5,
Fig. 7
wie gemäß Fig. 1, jedoch ist die radial innere Schleifbahn gegenüber der äußeren Schleifbahn durch eine Stufe versetzt angeordnet und
Fig. 8
wie gemäß Fig. 2, allerdings geht hier der Mittenschnitt durch die Scheibe gemäß Fig. 7.
Two embodiments of the invention are illustrated in the drawings and will be described in more detail below. Show it:
Fig. 1
a schematically illustrated plan view of a circular grinding surface of a grinding wheel with two grinding tracks according to the invention on a reduced scale, wherein the grinding surfaces lie in a plane,
Fig. 2
a section through the middle of the grinding surface after Fig. 1 However, although the cross section of the grinding surface is shown enlarged and the body is only partially shown,
Fig. 3
a schematically illustrated plan view of a circular grinding surface of a second embodiment according to the invention, wherein the individual grinding tracks are arranged not circumferentially but transversely divided on the grinding wheel,
Fig. 4
as per Fig. 2 , but here the center section goes through the window according to Fig. 3 .
Fig. 5
1 is a schematic plan view of a third embodiment of a circular grinding surface of a grinding wheel with two grinding tracks, wherein the surface of the disk is inclined towards the center,
Fig. 6
as per Fig. 2 , but here the center section goes through the window according to Fig. 5 .
Fig. 7
as per Fig. 1 However, the radially inner grinding path is offset from the outer grinding path offset by a step and
Fig. 8
as per Fig. 2 , but here the center section goes through the window according to Fig. 7 ,

In den Ausführungsbeispielen der Figuren 1 bis 8 besteht die Schleifeinrichtung 1 aus einem Schleifträger 2, an dessen als Trägerfläche ausgebildeten Oberfläche 3 eine mit Schleifelementen 4 versehene Schleifschicht 5 ausgebildet ist. Die Schleifschicht 5 ist in ihrer Dicke in den Zeichnungen, der besseren Darstellung halber, vergrößert dargestellt. Die Schleifschicht 5 besteht hier aus zwei Schleifbahnen 6, 7, deren Schleifoberflächen 8, 9 an der Linie 10 aneinandergrenzen. In den Figuren 1 und 2 verläuft die Schleifoberfläche 8 kreisringförmig zu der Schleifoberfläche 9, die als Kreis von der Schleifoberfläche 8 eingeschlossen ist. Der Übergang der Schleifoberfläche 9 zur Schleifoberfläche 8 geht praktisch nahtlos an der Linie 10 über. Schleifoberflächen 8, 9 liegen hier in einer horizontalen Ebene.In the embodiments of the FIGS. 1 to 8 the grinding device 1 consists of a grinding carrier 2, on whose surface 3 formed as a carrier surface an abrasive layer 5 provided with grinding elements 4 is formed. The abrasive layer 5 is shown enlarged in its thickness in the drawings, for better illustration. The abrasive layer 5 consists here of two sliding tracks 6, 7, the grinding surfaces 8, 9 adjoin the line 10. In the Figures 1 and 2 the grinding surface 8 is annular to the grinding surface 9, which is included as a circle of the grinding surface 8. The transition of the grinding surface 9 to the grinding surface 8 is virtually seamless on the line 10 over. Abrasive surfaces 8, 9 lie here in a horizontal plane.

In den Figuren 3 und 4 verläuft die Schleifoberfläche 8 gemäß einem Ausschnitt eines Halbmondes, wobei allerdings mittig ein Halbkreis gebildet wird, so daß der Rest die Schleifoberfläche 9 eines halben Kreisring auf der insgesamt runden Schleifschicht 5 einnimmt. Auch hier liegen die Schleifoberflächen 8, 9 in einer horizontalen Ebene.In the FIGS. 3 and 4 the grinding surface 8 extends according to a section of a crescent, although a semicircle is formed in the middle, so that the remainder occupies the grinding surface 9 of half a circular ring on the overall round grinding layer 5. Again, the grinding surfaces 8, 9 are in a horizontal plane.

In den Figuren 5 und 6 sind die Schleifoberflächen 8, 9 in Draufsicht gesehen wie in Fig. 1 ausgebildet. Sie verlaufen aber gemäß Fig. 6 abfallend zur Mitte 11 hin, so daß ihre Mantelflächen eine gemeinsame Kegelfläche bildet.In the FIGS. 5 and 6 are the grinding surfaces 8, 9 seen in plan view as in Fig. 1 educated. But they are proceeding according to Fig. 6 sloping towards the middle 11 out, so that their lateral surfaces forms a common conical surface.

Die Schleifoberflächen gemäß Fig. 7 und 8 entsprechen im wesentlichen denen gemäß Fig. 1 und 2, allerdings ist am Übergang von der Schleifoberfläche 8 zur Schleifoberfläche 9 eine Stufe 12 ausgebildet, so daß die Schleifoberfläche 9 tiefer liegt als die Schleifoberfläche 8. Es ist aber auch denkbar, die Stufe 12 nach oben hin überstehen zu lassen, so daß dann die Schleif-oberfläche 9 über der Schleifoberfläche 8 liegen würde. Es ist auch denkbar, daß anstelle der Stufe 12 eine schräge Rampe ausgebildet ist, damit der Übergang stetig verläuft. Auch kann die Stufe 12 von einem Radius gebildet werden, um den Übergang stetig erscheinen zu lassen.The grinding surfaces according to FIGS. 7 and 8 essentially correspond to those according to Fig. 1 and 2 However, at the transition from the grinding surface 8 to the grinding surface 9, a step 12 is formed, so that the grinding surface 9 is lower than the grinding surface 8. It is also conceivable to let the step 12 project upwards, so that then the grinding surface 9 would lie above the grinding surface 8. It is also conceivable that instead of the step 12, an inclined ramp is formed, so that the transition is continuous. Also, the step 12 may be formed by a radius to make the transition steady.

Ein Borstenbüschel 13 ist in Fig. 2 skizzenhaft dargestellt und verläuft hier senkrecht zur Schleifoberfläche 8. Das Borstenbüschel 13 besteht aus einzelnen in der Längsrichtung der Borstenbüschel 13 verlaufenden Borstenfilamenten 15. Sobald die Enden 14 der Borstenbüschel 13 ausreichend mit der Schleifoberfläche 8 bearbeitet wurden, kann entweder das Borstenbüschel 13 radial nach innen auf die zweite Schleifoberfläche 9 gebracht werden oder der Schleifträger 2 wird nach rechts so weit gefahren, bis die Enden 14 der Borstenbüschel 13 auf der radial inneren Oberfläche 9 zu liegen kommen, um dort bearbeitet werden zu können. Dabei kann beispielsweise die Drehgeschwindigkeit der Schleifeinrichtung 1 vergrößert oder verkleinert werden, um den erwünschten Abrieb an den Enden 14 der Borstenbüschel 13 zu erreichen.A bristle tuft 13 is in Fig. 2 The bristle tufts 13 consist of individual in the longitudinal direction of the bristle tufts 13 extending bristle filaments 15. Once the ends 14 of the bristle tufts 13 have been sufficiently processed with the grinding surface 8, either the bristle tufts 13 radially inwardly on the second grinding surface 9 are brought or the grinding carrier 2 is moved to the right until the ends 14 of the bristle tufts 13 come to lie on the radially inner surface 9 in order to be processed there. In this case, for example, the rotational speed of the grinding device 1 can be increased or decreased in order to achieve the desired abrasion at the ends 14 of the bristle tufts 13.

Die Schleifeinrichtung 1 gemäß Figuren 3 und 4 bewirkt, daß hier diese oszillierend um ihre Achse 11 gedreht werden muß, wenn die Borstenbüschel 13 auf nur einer Schleifoberfläche 8 oder 9 verharren sollen.The grinding device 1 according to FIGS. 3 and 4 causes this here must be rotated about its axis 11, when the bristle tufts 13 to remain on only one grinding surface 8 or 9.

Gemäß den Figuren 5 und 6 können hier die Borstenbüschel 13 so ausgerichtet sein, daß sie parallel zur Mitte 11 verlaufen, d.h., die Enden 14 der Borstenbüschel 13 werden schräg angeschliffen bzw. verrundet werden.According to the FIGS. 5 and 6 Here, the bristle tufts 13 may be aligned so that they are parallel to the center 11, ie, the ends 14 of the bristle tufts 13 are obliquely ground or rounded.

Die Schleifeinrichtung 1 gemäß den Figuren 7 und 8 ermöglicht beim Übergang der Enden 14 der Borstenbüschel 13 von der äußeren Schleifoberfläche 8 auf die innere Schleifoberfläche 9 eine Andruckverminderung, so daß mit weniger Kraft diese gegen die Obefläche 9 gedrückt werden. Dies ist insbesondere dann von Vorteil, wenn die Schleifoberfläche 9 als Polieroberfläche dienen soll.The grinding device 1 according to the FIGS. 7 and 8 allows the transition of the ends 14 of the bristle tufts 13 from the outer grinding surface 8 on the inner grinding surface 9 a pressure reduction, so that they are pressed with less force against the surface 9. This is particularly advantageous if the grinding surface 9 is to serve as a polishing surface.

Claims (8)

  1. An abrasive device (1) for finishing the ends (14) of bristle filaments (15) of toothbrushes, consisting of abrasive surfaces (8, 9) conformed on an abrasive support (2) with abrasive elements (4), over which the ends (14) of the bristle filaments (15) glide during abrasive finishing and are thus finished mechanically,
    characterized in that
    several abrasive tracks (6, 7) having various abrasive elements (4) are conformed on the abrasive surface (3).
  2. The abrasive device according to claim 1,
    characterized in that
    the abrasive tracks (6) are separated from each other by steps (12).
  3. The abrasive device according to claim 1,
    characterized in that
    the abrasive surface (8, 9) is cambered or arched on at least one abrasive track (6 and/or 7, or 6, 7).
  4. The abrasive device according to claim 1,
    characterized in that
    the abrasive elements (4) of the individual abrasive tracks (6, 7) may be constituted differently with respect to their size, material and shape.
  5. The abrasive device according to claim 1,
    characterized in that
    it consists of a flat or a curved disc, on whose radially inner area a first round abrasive track (7) is conformed and on whose peripheral area a second annular abrasive track (6) is conformed.
  6. The abrasive device according to claim 5,
    characterized in that
    the abrasive surface (8, 9, or 8 and/or 9), forms the lateral surface of a cone or truncated cone, the centre point (11) of which passes through the centre of rotation of the abrasive support (2).
  7. The abrasive device according to claim 1,
    characterized in that
    it is formed by a circulating band or circulating roller and that the various abrasive surfaces (8, 9) are arranged side by side.
  8. The abrasive device according to one of the claims 1 to 7,
    characterized in that
    the rotating speed of the abrasive surface (8, 9), is modified to match the abrasive track (6, 7).
EP02787856A 2002-02-20 2002-11-28 Grinding device for machining the ends of bristle filaments of toothbrushes Expired - Lifetime EP1476045B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10207071A DE10207071A1 (en) 2002-02-20 2002-02-20 Grinding device for processing the ends of bristle filaments of toothbrushes
DE10207071 2002-02-20
PCT/EP2002/013440 WO2003070054A1 (en) 2002-02-20 2002-11-28 Grinding device for machining the ends of bristle filaments of toothbrushes

Publications (2)

Publication Number Publication Date
EP1476045A1 EP1476045A1 (en) 2004-11-17
EP1476045B1 true EP1476045B1 (en) 2009-02-11

Family

ID=27674770

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02787856A Expired - Lifetime EP1476045B1 (en) 2002-02-20 2002-11-28 Grinding device for machining the ends of bristle filaments of toothbrushes

Country Status (6)

Country Link
US (1) US20030157872A1 (en)
EP (1) EP1476045B1 (en)
AT (1) ATE422313T1 (en)
AU (1) AU2002352175A1 (en)
DE (2) DE10207071A1 (en)
WO (1) WO2003070054A1 (en)

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2309016A (en) * 1942-02-09 1943-01-19 Norton Co Composite grinding wheel
US3451173A (en) 1966-02-17 1969-06-24 Carlson Tool & Machine Co Abrasive element for finishing paint brushes or the like
US5165761A (en) * 1991-12-30 1992-11-24 The Procter & Gamble Company Method of making improved toothbrush having multi-level tufts with substantially uniformly rounded bristle ends in each tuft
US5496209A (en) * 1993-12-28 1996-03-05 Gaebe; Jonathan P. Blade grinding wheel
US5503592A (en) * 1994-02-02 1996-04-02 Turbofan Ltd. Gemstone working apparatus
US5593213A (en) * 1994-03-11 1997-01-14 Gillette Canada Inc. Bristle finishing fork
DE19639453B4 (en) * 1996-07-05 2011-06-09 Anton Zahoransky Gmbh & Co. grinder
DE19644025A1 (en) * 1996-10-31 1998-05-07 Zahoransky Anton Gmbh & Co Machining system for bristles especially of tooth-brushes
DE19847407A1 (en) * 1998-10-14 2000-04-20 Schiffer Fa M & C Grinding tool to process bristle filaments of e.g. tooth brushes, has rotating cylinder with teeth having grinding surfaces on the sides, to remove burrs from bristle ends
DE19848221A1 (en) 1998-10-20 2000-04-27 Zahoransky Anton Gmbh & Co Grinding device for ends of bristles especially tooth brush consists of rotating cylinder roller with partially non-circular circumference

Also Published As

Publication number Publication date
DE10207071A1 (en) 2003-09-11
EP1476045A1 (en) 2004-11-17
DE50213277D1 (en) 2009-03-26
WO2003070054A1 (en) 2003-08-28
AU2002352175A1 (en) 2003-09-09
ATE422313T1 (en) 2009-02-15
US20030157872A1 (en) 2003-08-21

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