EP1852248B1 - Device for guiding lower punches - Google Patents

Device for guiding lower punches Download PDF

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Publication number
EP1852248B1
EP1852248B1 EP07006625.3A EP07006625A EP1852248B1 EP 1852248 B1 EP1852248 B1 EP 1852248B1 EP 07006625 A EP07006625 A EP 07006625A EP 1852248 B1 EP1852248 B1 EP 1852248B1
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EP
European Patent Office
Prior art keywords
cam
charging
cam element
filling
heads
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.)
Not-in-force
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EP07006625.3A
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German (de)
French (fr)
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EP1852248A3 (en
EP1852248A2 (en
Inventor
Harald Römer
Peter Lüneburg
Bernd Malner
Hans Wolf
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Fette Compacting GmbH
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Fette Compacting GmbH
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Publication of EP1852248A2 publication Critical patent/EP1852248A2/en
Publication of EP1852248A3 publication Critical patent/EP1852248A3/en
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Publication of EP1852248B1 publication Critical patent/EP1852248B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B11/00—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space
    • B30B11/08—Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses using a ram exerting pressure on the material in a moulding space co-operating with moulds carried by a turntable
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S100/00—Presses
    • Y10S100/903—Pelleters
    • Y10S100/906—Reciprocating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/005—Cammed

Definitions

  • the invention relates to a device for guiding lower punches over the lower punch head in a rotary press having a rotor in the region of a filling device according to the preamble of patent claim 1.
  • Upper and lower punches of a rotary press which are lift-movable in a punch guide of the press rotor and cooperate with holes in the die table, are controlled in height during the rotation of the rotor.
  • the filling of the holes with a powder to be compacted takes place with a filling device, wherein the lower punches remain in the bore while the upper punches are located above the bore.
  • the heights of the lower punches during filling specify the filling volume.
  • the ejection of the pellets takes place at the level of the die table, including an ejector curve.
  • the lower punches are pulled down with the aid of a filling curve to the filling depth required in the hole.
  • the dies are again moved upwards in a metering station by a certain amount, whereby a portion of the filling is metered out, i. is returned to the filling device.
  • a metering curve is provided, which is infinitely adjustable in height by means of a suitable controlled positioning drive.
  • the individual curves are usually realized with curve elements that guide the punch heads. This is also the case with the filling curve. It is known to provide filling curves with different Greschenenabstufitch.
  • a filling curve with a larger adjustment depth is selected and vice versa.
  • the exact filling volume is set by a more or less large stroke of the metering curve.
  • powder dosed back into the filling device can lead to filling problems, e.g. by blockages, undesirable compression of the powder in the filling device, sticking of the powder and so on.
  • Switching to a different fill curve may also be required if the tablet output of the machine is increased. It has been found that at the same position of the lower punch, the amount of material filled into the holes, the lower the higher the speed of the rotor. From a certain peripheral speed, the remaining filling time is too small to fill the hole completely with powder. This has the consequence that in the dosing no exact filling volume can be achieved by dosing more. Again, it may be necessary to change the filling depth, i. here to enlarge, so that the compact receives the target weight.
  • the replacement of a filling curve is associated with a large installation and time.
  • the machine trim parts and the powder filling device must be removed from the machine.
  • several lower punches have to be removed and the powder in the press has to be sucked off.
  • the production operation of the press is naturally interrupted.
  • JP 07241698 A It has become known to form a filling curve of two filling curve elements, of which the first is press-fixed and the second vertically adjustable.
  • the vertically adjustable filling curve section is in turn followed by a press-resistant section.
  • the invention has for its object to provide a device for guiding Unterstempeln about their Unterstempelkopf in a rotor having a rotary press in the region of a filling device which overcomes the disadvantages described and allows a change in the filling depth without much effort.
  • a first press-tight filling curve element is provided with a first filling curve section adjoining the ejector curve.
  • the heads of the lower dies always leave the ejector curve at the same height.
  • the first Grekurvenabites is therefore arranged so that the punch heads are transferred without step in this.
  • the guide in the first Artkurvenabêt is exclusively on the rotor axis facing side of the punch head.
  • There is provided a second adjustable Artkurvenelement which is attachable to the first Artkurvenelement in different positions.
  • the second Artkurvenelement has a second Artkurvenabêt at which the lower punch heads are guided alone on the side facing away from the rotor axis.
  • the second filling curve section is adjacent to the metering curve and has the task of feeding the lower punch heads to the rising ramp of the metering curve.
  • the second Grekurvenelement is adjustable both in height, ie vertically and in the circumferential direction of the rotor. The height adjustment thus causes a different filling depth. Consequently, the position of the second filling curve element determines the filling depth.
  • the heads of the lower punches meet at different heights on the leading to the dosing curve ramp.
  • the relative positions of the second Golfkurvenabêt and metering curve should not exceed a certain ratio, which means that the starting position of the metering curve must be adapted to the filling depth and thus the position of the second Grekurvenelements.
  • the two Gresvenium each have helical third Artkurvenabitese, which are arranged between the first and second Artkurvenabites and partially opposite each other. They are designed to guide the lower punch heads together over a distance. Since the slope of the third Artkurvenabitese corresponds to the slope along which the second Artkurvenelement is adjustable, regardless of the position of the second Artkurvenelements results in a steady transition between the individual Artkurvenabêten without the Unterstempelkexcellent suffer a shock in their leadership in the filling device.
  • the invention therefore allows a change in the filling depth by the peculiarity of the filling curve elements, wherein the adjustment can be made continuously or in fixed stages manually or by motor. A change of the filling curve with a change in the filling depth is therefore no longer necessary.
  • the second filling curve element has a predetermined adjustment path with respect to the press-tight first filling curve element, which is preferably predetermined by a curve element guide.
  • This guide can z. B. be a tongue and groove or alternatively a pin-groove guide. It is understood that after a predetermined displacement, the second Grekurvenelement is set relative to the first Grekurvenelement.
  • Fig. 1 shows in the development of a rotor 10 for a rotary tablet press.
  • the rotor has a die plate 12 with holes 14, with which pairs of upper punches 16 and lower punches 18 cooperate.
  • a filling device 20 fills the powder to be pressed into the holes 14 as they run along the filling device 20.
  • the lower punch 18 then have a position which dictates the filling volume.
  • the lower punches move with their heads 22 along a filling curve 24 which has a downward slope. This is followed by a metering curve 26, with which the lower punches 18 are raised again a little in order to dose the volume in the bores.
  • the metered material is received by the filling device 20.
  • the pressing of the powder takes place in the holes 14.
  • the upper punch 16 are gradually moved out of the holes 14, and the lower punch 18 push the compacts, which are designated 36, from the holes 14 out.
  • the lower punches 18 are moved by a Auswerferkurve 38 upwards.
  • the filling curve 24 closes in the direction of production, which in Fig. 1 from left to right, to the Auswerferkurve 38 at.
  • a bearing component (lower cam carrier) 40 can be seen, which is arranged press-firmly. It wears a press-tight first Curve element 42 with a first filling curve 46.
  • a second Grekurvenelement 48 is attached on the outside of the press-tight first Grekurvenelements 42.
  • the curve elements 42, 48 engage via a tongue and groove joint, which has a predetermined slope obliquely to the horizontal, as is apparent from the Figures 2 and 4 results.
  • the relative position to each other is determined by a screw 50.
  • the second curve element 48 has a second filling curve 52 (FIG. Figure 6 - cut EE).
  • the curve elements 42, 48 also have third filling curve sections 54 (FIG.
  • the second filling curve element 48 is displaced to the maximum with respect to the fixed filling curve element 42, indicated by ⁇ max .
  • the adjustable filling curve element 48 is pivoted by the minimum distance with respect to the fixed curve element 42, as in FIG FIG. 5 indicated by ⁇ min .

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Punching Or Piercing (AREA)

Description

Die Erfindung bezieht sich auf eine Vorrichtung zur Führung von Unterstempeln über den Unterstempelkopf in einer einen Rotor aufweisenden Rundläuferpresse im Bereich einer Befüllvorrichtung nach dem Oberbegriff des Patentanspruchs 1.The invention relates to a device for guiding lower punches over the lower punch head in a rotary press having a rotor in the region of a filling device according to the preamble of patent claim 1.

Ober- und Unterstempel einer Rundläuferpresse, die in einer Stempelführung des Pressenrotors hubbeweglich sind und mit Bohrungen im Matrizentisch zusammenwirken, werden während der Umdrehung des Rotors in der Höhe gesteuert. Die Befüllung der Bohrungen mit einem zu verpressenden Pulver erfolgt mit einer Befülleinrichtung, wobei die Unterstempel in der Bohrung verbleiben, während die Oberstempel sich oberhalb der Bohrung befinden. Die Höhenlagen der Unterstempel während der Befüllung geben das Befüllvolumen vor. Nach dem Verpressen findet das Ausstoßen der Presslinge auf die Höhe des Matrizentisches statt, wozu eine Auswerferkurve gehört. Zur Einstellung des Füllvolumens werden die Unterstempel mit Hilfe einer Füllkurve auf die in der Bohrung benötigte Fülltiefe heruntergezogen. Nach dem Füllen werden die Unterstempel in einer Dosierstation wieder um ein bestimmtes Maß nach oben bewegt, wodurch ein Teil der Füllung ausdosiert, d.h. wieder in die Befüllvorrichtung zurückgeführt wird. Hierfür ist eine Dosierkurve vorgesehen, die mit Hilfe eines geeigneten geregelten Positionierantriebs stufenlos in der Höhe verstellbar ist.Upper and lower punches of a rotary press, which are lift-movable in a punch guide of the press rotor and cooperate with holes in the die table, are controlled in height during the rotation of the rotor. The filling of the holes with a powder to be compacted takes place with a filling device, wherein the lower punches remain in the bore while the upper punches are located above the bore. The heights of the lower punches during filling specify the filling volume. After pressing, the ejection of the pellets takes place at the level of the die table, including an ejector curve. To adjust the filling volume, the lower punches are pulled down with the aid of a filling curve to the filling depth required in the hole. After filling, the dies are again moved upwards in a metering station by a certain amount, whereby a portion of the filling is metered out, i. is returned to the filling device. For this purpose, a metering curve is provided, which is infinitely adjustable in height by means of a suitable controlled positioning drive.

Die einzelnen Kurven werden üblicherweise mit Kurvenelementen realisiert, die die Stempelköpfe führen. Dies ist auch der Fall bei der Füllkurve. Es ist bekannt, Füllkurven mit unterschiedlichen Fülltiefenabstufungen vorzusehen.The individual curves are usually realized with curve elements that guide the punch heads. This is also the case with the filling curve. It is known to provide filling curves with different Fülltiefenabstufungen.

Ist ein größeres Füllvolumen erforderlich, wird eine Füllkurve mit größerer Verstelltiefe gewählt und umgekehrt. Das exakte Füllvolumen wird durch einen mehr oder weniger großen Hub der Dosierkurve eingestellt. Bei großen Ausdosierhüben der Dosierkurve kann geschehen, daß in die Befülleinrichtung zurückdosiertes Pulver zu Problemen bei der Befüllung führt, z.B. durch Verstopfungen, unerwünschtes Komprimieren des Pulvers in der Befülleinrichtung, Verkleben des Pulvers und so weiter. In solchen Fällen kann es notwendig sein, die Füllkurve durch eine geeignetere auszutauschen, z.B. mit einer mit geringerer Fülltiefe.If a larger filling volume is required, a filling curve with a larger adjustment depth is selected and vice versa. The exact filling volume is set by a more or less large stroke of the metering curve. In the case of large dosing strokes of the metering curve, powder dosed back into the filling device can lead to filling problems, e.g. by blockages, undesirable compression of the powder in the filling device, sticking of the powder and so on. In such cases it may be necessary to replace the filling curve with a more suitable one, e.g. with one with less filling depth.

Ein Wechsel zu einer anderen Füllkurve kann unter Umständen auch erforderlich werden, wenn der Tablettenausstoß der Maschine erhöht wird. Es hat sich herausgestellt, daß bei gleicher Position der Unterstempel die in die Bohrungen eingefüllte Materialmenge um so geringer wird, je höher die Drehzahl des Rotors ist. Ab einer bestimmten Umfangsgeschwindigkeit ist die verbleibende Füllzeit zu gering, um die Bohrung gänzlich mit Pulver auszufüllen. Das hat zur Folge, daß in der Dosierstation kein exaktes Füllvolumen durch Ausdosieren mehr erreicht werden kann. Auch hier kann es erforderlich sein, die Fülltiefe zu verändern, d.h. hier zu vergrößern, damit der Pressling das Sollgewicht erhält.Switching to a different fill curve may also be required if the tablet output of the machine is increased. It has been found that at the same position of the lower punch, the amount of material filled into the holes, the lower the higher the speed of the rotor. From a certain peripheral speed, the remaining filling time is too small to fill the hole completely with powder. This has the consequence that in the dosing no exact filling volume can be achieved by dosing more. Again, it may be necessary to change the filling depth, i. here to enlarge, so that the compact receives the target weight.

Das Auswechseln einer Füllkurve ist mit einem großen Montage- und Zeitaufwand verbunden. Hierzu müssen die Maschinenverkleidungsteile und die Pulverbefülleinrichtung aus der Maschine entnommen werden. Ferner müssen mehrere Unterstempel ausgebaut und das in der Presse befindliche Pulver abgesaugt werden. Während der Umrüstzeit ist der Produktionsbetrieb der Presse naturgemäß unterbrochen.The replacement of a filling curve is associated with a large installation and time. For this purpose, the machine trim parts and the powder filling device must be removed from the machine. Furthermore, several lower punches have to be removed and the powder in the press has to be sucked off. During the changeover time, the production operation of the press is naturally interrupted.

Aus JP 07241698 A ist bekannt geworden, eine Füllkurve von zwei Füllkurvenelementen zu bilden, von denen das erste pressenfest und das zweite vertikal verstellbar ist. An den vertikal verstellbaren Füllkurvenabschnitt schließt sich wiederum ein pressenfester Abschnitt an.Out JP 07241698 A It has become known to form a filling curve of two filling curve elements, of which the first is press-fixed and the second vertically adjustable. The vertically adjustable filling curve section is in turn followed by a press-resistant section.

Aus US 4,057,381 ist bekannt, mehrere Steuerkurvenabschnitte im Bereich der Füllvorrichtung vorzusehen, wobei ein Teil der Kurvenabschnitte vertikal verstellbar ist.Out U.S. 4,057,381 It is known to provide a plurality of cam sections in the region of the filling device, wherein a portion of the curve sections is vertically adjustable.

Aus DE-A 1 577 251 ist eine Vorrichtung zür Führung von Unterstempeln gemäß dem Oberbegriff des Anspruchs 1 bekannt geworden.Out DE-A 1 577 251 a device for guiding Unterstempeln has become known according to the preamble of claim 1.

Der Erfindung liegt die Aufgabe zugrunde, eine Vorrichtung zur Führung von Unterstempeln über ihren Unterstempelkopf in einer einen Rotor aufweisenden Rundläuferpresse im Bereich einer Befüllvorrichtung zu schaffen, welche die beschriebenen Nachteile behebt und eine Änderung der Fülltiefe ohne größeren Aufwand ermöglicht.The invention has for its object to provide a device for guiding Unterstempeln about their Unterstempelkopf in a rotor having a rotary press in the region of a filling device which overcomes the disadvantages described and allows a change in the filling depth without much effort.

Diese Aufgabe wird durch die Merkmale des Anspruchs 1 gelöst.This object is solved by the features of claim 1.

Bei der erfindungsgemäßen Vorrichtung ist ein erstes pressenfestes Füllkurvenelement vorgesehen mit einem sich an die Auswerferkurve anschließenden ersten Füllkurvenabschnitt. Die Köpfe der Unterstempel verlassen die Auswerferkurve stets in gleicher Höhe. Der erste Füllkurvenabschnitt ist daher so angeordnet, daß die Stempelköpfe ohne Stufe in diese überführt werden. Die Führung im ersten Füllkurvenabschnitt ist jedoch ausschließlich auf der der Rotorachse zugekehrten Seite des Stempelkopfes. Es ist ein zweites verstellbares Füllkurvenelement vorgesehen, das an dem ersten Füllkurvenelement in unterschiedlichen Positionen anbringbar ist. Das zweite Füllkurvenelement weist einen zweiten Füllkurvenabschnitt auf, an dem die Unterstempelköpfe allein auf der der Rotorachse abgewandten Seite geführt sind. Der zweite Füllkurvenabschnitt ist der Dosierkurve benachbart und hat die Aufgabe, die Unterstempelköpfe der ansteigenden Rampe der Dosierkurve zuzuführen. Das zweite Füllkurvenelement ist sowohl in der Höhe, d.h. vertikal als auch in Umfangsrichtung des Rotors verstellbar. Die Höhenverstellung bewirkt mithin eine unterschiedliche Fülltiefe. Mithin bestimmt die Position des zweiten Füllkurvenelements die Fülltiefe. Die Köpfe der Unterstempel treffen in unterschiedlichen Höhen auf die zur Dosierkurve führende Rampe. Allerdings versteht sich, daß die relativen Positionen von zweitem Füllkurvenabschnitt und Dosierkurve ein bestimmtes Verhältnis nicht übersteigen sollen, was bedeutet, daß die Ausgangsposition der Dosierkurve an die Fülltiefe und damit die Position des zweiten Füllkurvenelements angepaßt sein muß.In the apparatus according to the invention, a first press-tight filling curve element is provided with a first filling curve section adjoining the ejector curve. The heads of the lower dies always leave the ejector curve at the same height. The first Füllkurvenabschnitt is therefore arranged so that the punch heads are transferred without step in this. However, the guide in the first Füllkurvenabschnitt is exclusively on the rotor axis facing side of the punch head. There is provided a second adjustable Füllkurvenelement which is attachable to the first Füllkurvenelement in different positions. The second Füllkurvenelement has a second Füllkurvenabschnitt at which the lower punch heads are guided alone on the side facing away from the rotor axis. The second filling curve section is adjacent to the metering curve and has the task of feeding the lower punch heads to the rising ramp of the metering curve. The second Füllkurvenelement is adjustable both in height, ie vertically and in the circumferential direction of the rotor. The height adjustment thus causes a different filling depth. Consequently, the position of the second filling curve element determines the filling depth. The heads of the lower punches meet at different heights on the leading to the dosing curve ramp. However, it is understood that the relative positions of the second Füllkurvenabschnitt and metering curve should not exceed a certain ratio, which means that the starting position of the metering curve must be adapted to the filling depth and thus the position of the second Füllkurvenelements.

Die beiden Füllkurvenelemente weisen jeweils schraubenlinienförmige dritte Füllkurvenabschnitte auf, die zwischen dem ersten und zweiten Füllkurvenabschnitt angeordnet sind und sich teilweise gegenüberliegen. Sie sind so ausgebildet, daß sie die Unterstempelköpfe über eine Strecke gemeinsam führen. Da die Steigung der dritten Füllkurvenabschnitte der Steigung entspricht, entlang welcher das zweite Füllkurvenelement verstellbar ist, ergibt sich unabhängig von der Position des zweiten Füllkurvenelements ein stetiger Übergang zwischen den einzelnen Füllkurvenabschnitten, ohne das die Unterstempelköpfe bei ihrer Führung im Bereich der Füllvorrichtung einen Stoß erleiden.The two Füllkurvenelemente each have helical third Füllkurvenabschnitte, which are arranged between the first and second Füllkurvenabschnitt and partially opposite each other. They are designed to guide the lower punch heads together over a distance. Since the slope of the third Füllkurvenabschnitte corresponds to the slope along which the second Füllkurvenelement is adjustable, regardless of the position of the second Füllkurvenelements results in a steady transition between the individual Füllkurvenabschnitten without the Unterstempelköpfe suffer a shock in their leadership in the filling device.

Die Erfindung ermöglicht daher eine Veränderung der Fülltiefe durch die Besonderheit der Füllkurvenelemente, wobei die Verstellung stufenlos oder auch in festen Stufen manuell oder motorisch vorgenommen werden kann. Ein Wechsel der Füllkurve bei einer Änderung der Fülltiefe ist daher nicht mehr erforderlich.The invention therefore allows a change in the filling depth by the peculiarity of the filling curve elements, wherein the adjustment can be made continuously or in fixed stages manually or by motor. A change of the filling curve with a change in the filling depth is therefore no longer necessary.

Wie schon erwähnt, hat das zweite Füllkurvenelement bezüglich des pressenfesten ersten Füllkurvenelements einen vorgegebenen Verstellweg, der vorzugsweise durch eine Kurvenelementführung vorgegeben ist. Diese Führung kann z. B. eine Nut- und Federführung sein oder alternativ eine Stift-Nut-Führung. Es versteht sich, daß nach einem vorgegebenen Verstellweg das zweite Füllkurvenelement gegenüber dem ersten Füllkurvenelement festgesetzt wird.As already mentioned, the second filling curve element has a predetermined adjustment path with respect to the press-tight first filling curve element, which is preferably predetermined by a curve element guide. This guide can z. B. be a tongue and groove or alternatively a pin-groove guide. It is understood that after a predetermined displacement, the second Füllkurvenelement is set relative to the first Füllkurvenelement.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand von Zeichnungen näher erläutert.

Fig. 1
zeigt als Abwicklung des Teilkreisdurchmessers das Funktionsschema einer Rundläuferpresse.
Fig. 2
zeigt in Seitenansicht eine Ausführungsform einer Füllkurve nach der Erfindung.
Fig. 3
zeigt die Draufsicht auf die Füllkurve nach Fig. 2.
Fig. 4
zeigt eine ähnliche Seitenansicht wie Fig. 2 jedoch in einer minimalen Füllstellung.
Fig. 5
zeigt die Draufsicht der Füllkurve nach Fig. 4.
Fig. 6
zeigt die Schnitte durch Fig. 2 bzw. 5 an den angegebenen Positionen.
Embodiments of the invention will be explained in more detail with reference to drawings.
Fig. 1
shows as a development of the pitch circle diameter, the functional diagram of a rotary press.
Fig. 2
shows in side view an embodiment of a filling curve according to the invention.
Fig. 3
shows the top view of the fill curve Fig. 2 ,
Fig. 4
shows a similar side view as Fig. 2 but in a minimal filling position.
Fig. 5
shows the top view of the fill curve Fig. 4 ,
Fig. 6
shows the cuts through Fig. 2 or 5 at the specified positions.

Fig. 1 zeigt in der Abwicklung einen Rotor 10 für eine Rundläufertablettenpresse. Der Rotor weist eine Matrizenscheibe 12 mit Bohrungen 14 auf, mit denen jeweils Paare von Oberstempeln 16 und Unterstempeln 18 zusammenwirken. Eine Befüllvorrichtung 20 füllt das zu pressende Pulver in die Bohrungen 14, wenn diese an der Befüllvorrichtung 20 entlang laufen. Die Unterstempel 18 haben dann eine Position, welche das Füllvolumen vorgibt. Während des Befüllvorgangs bewegen sich die Unterstempel mit ihren Köpfen 22 entlang einer Füllkurve 24, die eine Neigung nach unten aufweist. Anschließend folgt eine Dosierkurve 26, mit der die Unterstempel 18 wieder ein wenig angehoben werden, um das Volumen in den Bohrungen zu dosieren. Das ausdosierte Material wird von der Befüllvorrichtung 20 aufgenommen. In zwei aufeinanderfolgenden Druckstationen mit Vordruckrollen 28, 30 und Hauptdruckrollen 32, 34 erfolgt die Verpressung des Pulvers in den Bohrungen 14. Die Oberstempel 16 werden allmählich aus den Bohrungen 14 herausbewegt, und die Unterstempel 18 stoßen die Presslinge, die mit 36 bezeichnet sind, aus den Bohrungen 14 heraus. Zu diesem Zweck werden die Unterstempel 18 durch eine Auswerferkurve 38 nach oben bewegt. Mithin schließt sich die Füllkurve 24 in Produktionsrichtung, die in Fig. 1 von links nach rechts verläuft, an die Auswerferkurve 38 an. Fig. 1 shows in the development of a rotor 10 for a rotary tablet press. The rotor has a die plate 12 with holes 14, with which pairs of upper punches 16 and lower punches 18 cooperate. A filling device 20 fills the powder to be pressed into the holes 14 as they run along the filling device 20. The lower punch 18 then have a position which dictates the filling volume. During the filling process, the lower punches move with their heads 22 along a filling curve 24 which has a downward slope. This is followed by a metering curve 26, with which the lower punches 18 are raised again a little in order to dose the volume in the bores. The metered material is received by the filling device 20. In two successive printing stations with pre-pressure rollers 28, 30 and main pressure rollers 32, 34, the pressing of the powder takes place in the holes 14. The upper punch 16 are gradually moved out of the holes 14, and the lower punch 18 push the compacts, which are designated 36, from the holes 14 out. For this purpose, the lower punches 18 are moved by a Auswerferkurve 38 upwards. Thus, the filling curve 24 closes in the direction of production, which in Fig. 1 from left to right, to the Auswerferkurve 38 at.

Nachfolgend wird nur die Füllkurve 24 behandelt.Hereinafter, only the fill curve 24 will be discussed.

In den Figuren 2 bis 6 ist ein Lagerbauteil (unterer Kurventräger) 40 zu erkennen, das pressenfest angeordnet ist. Es trägt ein pressenfestes ersten Kurvenelement 42 mit einer ersten Füllkurve 46. Auf der Außenseite des pressenfesten ersten Füllkurvenelements 42 ist ein zweites Füllkurvenelement 48 angebracht. Die Kurvenelemente 42, 48 greifen über eine Nut- und Federverbindung ineinander, welche eine vorgegebene Steigung schräg zur Horizontalen aufweist, wie sich aus den Figuren 2 und 4 ergibt. Die Relativlage zueinander wird durch eine Schraube 50 festgelegt. Das zweite Kurvenelement 48 weist eine zweite Füllkurve 52 (Fig.6 - Schnitt E-E) auf. Die Kurvenelemente 42, 48 haben außerdem dritte Füllkurvenabschnitte 54 (Fig.6 - Schnitt D-D), die gemeinsam wirken und entlang einer schraubenlinienförmigen Bahn verlaufen. Die Nut- und Federführung weist die gleiche Steigerung auf, so daß bei einer Relativverschiebung zwischen den Kurvenelementen, die sowohl vertikal als auch horizontal ist, die gemeinsamen Füllkurvenabschnitte 54 stets zueinander ausgerichtet sind und die Köpfe der Unterstempel 18 gemeinsam führen, wie dies in Figur 6 dargestellt ist. Im ersten Füllkurvenelement 42 erfolgt die Führung der Köpfe 22 nur im ersten Kurvenabschnitt 46 auf der der Rotorachse zugekehrten Seite, während die andere Seite der Köpfe 22 frei ist. (Fig.6 - Schnitt F-F) Im zweiten Kurvenelement gemäß Fig.6 - Schnitt E-E erfolgt eine Führung ausschließlich durch den zweiten Füllkurvenabschnitt 52.In the FIGS. 2 to 6 a bearing component (lower cam carrier) 40 can be seen, which is arranged press-firmly. It wears a press-tight first Curve element 42 with a first filling curve 46. On the outside of the press-tight first Füllkurvenelements 42, a second Füllkurvenelement 48 is attached. The curve elements 42, 48 engage via a tongue and groove joint, which has a predetermined slope obliquely to the horizontal, as is apparent from the Figures 2 and 4 results. The relative position to each other is determined by a screw 50. The second curve element 48 has a second filling curve 52 (FIG. Figure 6 - cut EE). The curve elements 42, 48 also have third filling curve sections 54 (FIG. Figure 6 - Section DD), which act together and run along a helical path. The tongue and groove guide has the same increase, so that in a relative displacement between the cam elements, which is both vertical and horizontal, the common Füllkurvenabschnitte 54 are always aligned with each other and the heads of the lower punch 18 lead together, as in FIG. 6 is shown. In the first filling curve element 42, the guides 22 are guided only in the first curve section 46 on the side facing the rotor axis, while the other side of the heads 22 is free. ( Figure 6 - section FF) in the second curve element according to Figure 6 - Cut EE is a guide exclusively through the second Füllkurvenabschnitt 52.

Unabhängig davon, welche Relativlage das Kurvenelement 48 zum Kurvenelement 42 hat, ergibt sich ein stetiger Übergang vom inneren Füllkurvenabschnitt 46 zum Füllkurvenabschnitt 54 und von diesem zum Füllkurvenabschnitt 52. Eine unterschiedliche Relativposition hat jedoch eine unterschiedliche Position des Endes des Füllkurvenabschnitts 52 zur Folge. Bei den Positionen in Figur 2 werden im Rahmen des Verstellweges des zweiten Füllkurvenelements 48 die Unterstempel 18 maximal nach unten bewegt. Die Fülltiefe in den Bohrungen 14 ist daher maximal, wie auch durch tmax in Figur 2 angedeutet ist. In Figur 4 ist die Fülltiefe des Unterstempels 18 minimal, wie durch tmin angedeutet. Bei der maximalen Fülltiefe ist das zweite Füllkurvenelement 48 maximal gegenüber dem festen Füllkurvenelement 42 nach rechts verschoben, angedeutet durch βmax· Bei der minimalen Fülltiefe ist das verstellbare Füllkurvenelement 48 um den Mindestweg gegenüber dem festen Kurvenelement 42 verschwenkt, wie in Figur 5 durch βmin angezeigt.Whichever relative position the cam member 48 has to the cam member 42, there is a steady transition from the inner fill cam portion 46 to the fill cam portion 54 and from there to the fill cam portion 52. However, a different relative position results in a different position of the end of the fill cam portion 52. In the positions in FIG. 2 As a result of the adjustment path of the second filling cam 48, the lower punches 18 are moved downwards to a maximum extent. The filling depth in the holes 14 is therefore maximum, as well as by t max in FIG. 2 is indicated. In FIG. 4 the filling depth of the lower punch 18 is minimal, as indicated by t min . At the maximum filling depth, the second filling curve element 48 is displaced to the maximum with respect to the fixed filling curve element 42, indicated by β max . At the minimum filling depth, the adjustable filling curve element 48 is pivoted by the minimum distance with respect to the fixed curve element 42, as in FIG FIG. 5 indicated by β min .

In Figur 2 und 4 ist angedeutet, daß die Verstellung des verstellbaren Füllkurvenelements 48 in vier Stufen erfolgt, da eine Festsetzung durch die Schraube 50 nur in vier Stufen möglich ist. Es versteht sich, daß auch eine kontinuierliche Verstellung zwischen minimaler und maximaler Fülltiefe möglich ist. Außerdem kann diese Verstellung motorisch erfolgen.In FIG. 2 and 4 is indicated that the adjustment of the adjustable Füllkurvenelements 48 takes place in four stages, since a determination by the screw 50 is possible only in four stages. It is understood that a continuous adjustment between minimum and maximum filling depth is possible. In addition, this adjustment can be done by motor.

Claims (6)

  1. A device for guiding lower rams (18) across lower ram heads (22) in a rotor-type rotary press in an area of a filling device wherein between an ejector cam preceding in production direction and a proportioning cam (26) a displaceable height adjustable a first press-mounted charging-cam element and a second height displaceable charging-cam element (48) are mounted, and the charging-cam elements (42, 48) being so designed that they guide the heads of the lower rams (18) running with the rotor (16) from a level at the end of the ejector cam (38) to a lower transition level of the proportioning cam (26), characterized in that the press-mounted first charging-cam element (42) with a charging-cam portion (46) guides the heads (22) of the lower rams only on the side facing the rotor axis jointly to the ejector cam (38), the second displaceable charging-cam element (48) with the second charging-cam element (52) guides the heads of the lower rams (22) only on the side facing away from the rotor axis prior to encountering the proportioning cam (26), the second charging-cam element (48) is displaceable along a given adjustment upward slope in circumferential direction of rotor (10) and first and second charging-cam elements (42, 48) include helically shaped charging-cam portions (54) located between the first and the second charging-cam portions (46, 52) which partially guide the heads (22) of the lower rams a predetermined length commonly with the slope of the third charging-cam portions (54) corresponding to the adjustment slope.
  2. The device according to claim 1, characterized in that the displaceable charging-cam element (48) is adjusted in an infinitely variable way or by predetermined steps.
  3. The device according to claim 2, characterized in that the displaceable charging-cam element (48) is varied by means of an adjustable drive.
  4. The device according to claim 1, characterized in that the second charging-cam element (48) is guided along a cam element guide.
  5. The device according to claim 4, characterized in that the cam element guide is defined by a groove-type and protrusion-type guide or a pin/groove-type guide.
  6. The device according to claim 1, 4 or 6, characterized in that the second charging-cam element (48) is adapted to be fixed to the first charging-cam element (42) by means of a screw (50).
EP07006625.3A 2006-05-02 2007-03-30 Device for guiding lower punches Not-in-force EP1852248B1 (en)

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DE102006020214A DE102006020214B3 (en) 2006-05-02 2006-05-02 Device for guiding lower punches

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EP1852248A2 EP1852248A2 (en) 2007-11-07
EP1852248A3 EP1852248A3 (en) 2009-08-19
EP1852248B1 true EP1852248B1 (en) 2015-03-18

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Publication number Priority date Publication date Assignee Title
DE102007057790B4 (en) * 2007-11-30 2011-02-10 Fette Gmbh Rotary press
FR2933897B1 (en) * 2008-07-18 2011-05-20 Eurotab DEVICE FOR FORMING TABLETS BY CONSTANT VOLUME COMPACTION
US20110024937A1 (en) * 2009-07-30 2011-02-03 Semen Dukler Tablet Formation System for Fully-Loaded Presses
CN107718674B (en) * 2017-10-19 2019-05-07 重庆电子工程职业学院 A kind of battery cap blank forming machine
IT202000000112A1 (en) * 2020-01-08 2021-07-08 Ima Spa Tablet press machine.
CN112590291B (en) * 2020-12-04 2022-07-22 重庆医药高等专科学校 Tabletting device for pharmacy

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US2970554A (en) * 1959-01-09 1961-02-07 Bristol Myers Co Tablet press
US3384035A (en) * 1965-06-02 1968-05-21 Pennsalt Chemicals Corp Industrial process and apparatus
DE2604648C2 (en) * 1976-02-04 1980-10-09 Emil Korsch Spezialfabrik Fuer Komprimiermaschinen, 1000 Berlin Rotary press
US4047866A (en) * 1976-11-22 1977-09-13 The Dow Chemical Company Automatic self-lubricating rotary tablet press
JP2500196B2 (en) * 1994-03-03 1996-05-29 株式会社菊水製作所 Rotary powder compression molding machine
IT1274883B (en) * 1994-08-05 1997-07-25 Ima Spa DOSING DEVICE IN COMPRESSING MACHINES FOR THE PRODUCTION OF TABLETS.
DE10318529B4 (en) * 2003-04-24 2006-01-12 Fette Gmbh A method of operating a rotary tableting machine and rotary tableting machine

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EP1852248A3 (en) 2009-08-19
EP1852248A2 (en) 2007-11-07
US7360483B2 (en) 2008-04-22
DE102006020214B3 (en) 2007-12-27
US20070257411A1 (en) 2007-11-08

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