EP2082867B1 - Tablet press - Google Patents

Tablet press Download PDF

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Publication number
EP2082867B1
EP2082867B1 EP08019180.2A EP08019180A EP2082867B1 EP 2082867 B1 EP2082867 B1 EP 2082867B1 EP 08019180 A EP08019180 A EP 08019180A EP 2082867 B1 EP2082867 B1 EP 2082867B1
Authority
EP
European Patent Office
Prior art keywords
rotor
tablet press
drive
press according
punch
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
Application number
EP08019180.2A
Other languages
German (de)
French (fr)
Other versions
EP2082867A2 (en
EP2082867A3 (en
Inventor
Daniel Malick
Wolfgang Soltau
Jörg Gaedecke
Matthias Rau
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fette GmbH
Original Assignee
Fette GmbH
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Filing date
Publication date
Application filed by Fette GmbH filed Critical Fette GmbH
Publication of EP2082867A2 publication Critical patent/EP2082867A2/en
Publication of EP2082867A3 publication Critical patent/EP2082867A3/en
Application granted granted Critical
Publication of EP2082867B1 publication Critical patent/EP2082867B1/en
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Anticipated expiration legal-status Critical

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B11/00Presses specially adapted for forming shaped articles from material in particulate or plastic state, e.g. briquetting presses, tabletting presses
    • B30B11/02Presses 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
    • B30B11/08Presses 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
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B30PRESSES
    • B30BPRESSES IN GENERAL
    • B30B15/00Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/02Dies; Inserts therefor; Mounting thereof; Moulds
    • B30B15/026Mounting of dies, platens or press rams

Definitions

  • the invention relates to a tablet press according to the preamble of claim 1.
  • the invention relates in particular to a tablet press whose rotor has a matrix disc consisting of segments.
  • a typical tablet press is a so-called rotary press. Whenever tablet presses are mentioned above and below, naturally also those rotary presses are meant with which any desired other compacts can be produced, for example in the food, detergent or other sector.
  • the typical structure of a rotary press is the bearing of a rotor in a press frame, wherein the rotor has bores for the guidance of upper and lower punches between which a die plate is arranged with die holes with which the stamp interact during the rotation of the rotor.
  • the press dies are actuated in printing stations by pressure rollers and guided outside of these via control cams.
  • the rotor is driven by a suitable drive motor.
  • a suitable drive motor In this context, it has also become known to integrate an electric motor in a rotor, wherein the rotor of the electric motor is on the outside and is in engagement with the inner wall of the rotor.
  • the rotor is mostly molded in one piece.
  • the die plate may be formed integrally with the rotor.
  • the invention has the object of providing a tablet press with segmented die plate in such a way that predetermined clamping forces can be applied to the die segments in a simple manner.
  • At least one drive device for the clamping elements is arranged in the frame of the tablet press with a height adjustable drive element, which is selectively engageable with the lower end of the clamping element in engagement.
  • the tension member is passed through a passage in the rotor and in abutment with the underside of the associated Matrices segment engageable.
  • a drive device which can operate electrically, hydraulically or pneumatically, is designed to apply an axial compressive force either directly or indirectly to the clamping element in order to exert a predetermined clamping force on the associated matrix segment with the clamping element.
  • the drive device is arranged stationary in the frame, whereby the rotor must be adjusted by appropriate rotation so that the drive element and clamping element are aligned with each other when the clamping element is to be actuated.
  • the clamping of the die elements can be automated, and it is not necessary to apply a predetermined force to the clamping element via an operator, for example with the aid of a torque wrench.
  • the operator When manually clamping the segments, the operator must apply the necessary clamping force or release force himself. Therefore, it may happen that the necessary tension is not guaranteed.
  • built-in tableting tools manual clamping and releasing is difficult or even impossible.
  • An embodiment of the invention provides that the rotor is surrounded by a stationary housing, which cooperates sealingly with the rotor and forms a process space and the lower ends of the clamping elements are outside the process space.
  • the process space is designed to substantially surround the rotor but leave the top and bottom portions of the rotor free.
  • the process space is therefore relatively small, but thereby also allows a cleaning of all the process space facing parts without the removal of stamps or the like is required. It is therefore also advantageous according to a further embodiment of the invention, when the clamping elements are sealingly passed through the passage into the process space.
  • the drive device however, is outside the process space. When retrofitting therefore must not be worked in confined space. Also, the process space facing portions of the clamping elements can be cleaned by cleaning within the process room with and therefore need not be removed.
  • FIG. 1 Various embodiments are conceivable for bringing the clamping elements axially into contact with the segments of the die plate.
  • An embodiment of the invention provides that the lower end of the clamping element is associated with a spindle drive and a rotary drive device is provided, the rotary spindle can be coupled to the spindle drive.
  • the invention provides that the drive device is connected to a lifting device in the frame.
  • a rotary drive the rotary spindle is axially adjustable to be brought into engagement with the spindle drive of the clamping element.
  • a die plate consists of several segments, for example of five segments.
  • One embodiment provides that two or more clamping elements are provided per segment. As a result, a uniform clamping of the segments can be achieved, in particular, if, according to a further embodiment of the invention, parallel drive devices are operated simultaneously.
  • the number of drive devices equal to the number of clamping elements.
  • the effort for this is relatively high. It can therefore be used according to an embodiment of the invention, a smaller number of drive devices when a control device for the rotary motor of the rotor is designed so that the rotor can be positioned in predetermined rotational positions to align the drive element with the clamping element.
  • FIGS. 1 and 2 show a segment of a rotor 10 for a tablet press, as is well known in the art.
  • the rotor has an upper punch guide 12 and a lower punch guide 14, which guide bores 16 and 18, record the press dies, not shown. Just as an example, for recording the press die on the DE 10 2004 040 163 pointed.
  • the rotor 10 is rotated by a drive motor, not shown in rotation.
  • the engine may be integrated into the rotor 10 according to the last-mentioned document.
  • the rotor 10 is rotatably mounted on a column of a frame, not shown, for the tablet press. This too is in DE 10 2004 040 163 described.
  • the rotor 10 receives a die plate, which is composed of individual segments 20.
  • Fig. 6 shows the top view of a die plate with five arranged in a circle segments having holes 22.
  • a tensioning die or tensioning element 24 is shown, which extends through a passage in the lower punch guide 14, in abutment against the underside of the segment 20, in order to press the segment against a radial abutment surface 26.
  • upper punch and lower punch holder 12, 14 are integrally formed.
  • Fig. 3 shows the side view of a rotor 10a, which is substantially the rotor 10 after the FIGS. 1 and 2 like. It is indicated a single die segment 20, which is pressed against an abutment surface 26, by means of a clamping element 24a. As indicated by arrow 28, the clamping element 24a can be changed in the axial direction or in its length.
  • a drive device 44 is provided, which is connected to the frame of the tablet press, not shown.
  • Dashed lines is at 32 in Fig. 3 indicated as a housing is extending around the rotor 10a around. It acts sealingly with the rotor 10a together and forms a baling chamber 34.
  • a seal is shown, which seals the clamping element 24a, so that at this point the pressing space 34 is sealed from the environment.
  • Fig. 4 resembles this Fig. 3 , is therefore provided with the same reference numeral. He is opposite Fig. 3 shown rotated by 90 °. It can be seen that the segment 20 is pressed against the abutment surface 26 of the rotor 10a by means of two circumferentially spaced clamping elements 24a, 24b. Thus, two drives 42, 44 are provided, which simultaneously fix the segment 20 in the rotor 10a via the clamping elements 24a, 24b.
  • Fig. 5 is in turn the same rotor as in the FIGS. 3 and 4 shown and therefore has the same reference number.
  • the drive devices 42, 44 are shown via lifting devices 30a, 30b arranged on a platform 40 of the otherwise not shown frame of the tablet press.
  • the drive devices 42, 44 rotationally actuate drive or coupling elements 46.
  • the drive elements 46 can not only be rotated, but also be moved axially with the drive devices 42, 44 as indicated by arrow 28. This is done by the lifting devices 30a, 30b, which move the drive devices 42, 44 in height.
  • the drive and coupling elements 46 have at the upper end a web, the with a recess 48 of clamping elements 50, 52 is engageable to enable a spindle or the like in rotation.
  • each segment 20 includes two clamping elements, for example the clamping elements 50, 52, wherein only two drive devices 42, 44 are provided for all clamping elements 50, 52.
  • the rotor 10a is to be rotated in each case by a predetermined angle in order to align the clamping elements 50, 52 with the drive or coupling elements 46.
  • a segment 20 presses against the abutment surface 26.
  • a plunger 60 is within a bushing 62 which has a flange 64 at the lower end.
  • Fig. 2 It can be seen how the flange 64 is received in a recess of the lower punch guide 14 and secured therein. The downward movement of the punch 60 is limited by an internal shoulder in the sleeve 62.
  • a threaded spindle 66 is screwed centrally into an internally threaded bore 68 of the punch 60.
  • the threaded spindle 66 is supported via a radial flange 70 on the inner shoulder.
  • the threaded spindle 66 has a hexagonal head 72, which is located within a lower recess 74 of the sleeve 62.
  • a head 78 of a screwed radially into the punch 60 screw 80 In a lateral radially continuous slot 76 of the bush 62 is a head 78 of a screwed radially into the punch 60 screw 80.
  • the head 78 can move axially parallel in the slot 76 by a certain amount, but prevents rotational movement of the punch 60th
  • a holder 60a for a lifting cylinder 62a is arranged on the press frame 40.
  • the lift cylinder actuates a crossbar 64a which is bolted to arms 68a, 70a and which are connected at the other end to the housing of drive motors 72a, 74a.
  • the drive motors 72a, 74a have a shaft 76a or 78a, which run in a guide sleeve 80a, 82a and at the end of a coupling element 84, 86 have.
  • the Drive motors 72a, 74a are, for example, pneumatic motors with the aid of which the coupling elements 84, 86 can be set in rotation.
  • the motors 72a, 74a are provided with connections 88, 90 for compressed air.
  • Fig. 10 is also the lower part of the rotor 10 partially indicated with the clamping elements 24.
  • the coupling elements 84, 86 are aligned with the clamping elements 24 shown in the middle. If the entire arrangement is now moved upwards with the aid of the lifting cylinder 82, the coupling elements 84, 86 move, as has already been described above, through a passage in the lower punch guide in order to engage in a Fig. 10 not shown spindle of the clamping elements in rotary connection to occur.
  • the spindle drive can be carried out, for example, in the manner as shown by the FIGS. 8 and 9 is shown.
  • two clamping elements 24 can be actuated simultaneously for one segment 20 each. If the clamping elements are to be actuated for a further die segment, the rotor 10 is further rotated by the corresponding angle, until in turn the coupling elements 84, 86 are aligned with the associated clamping elements 24.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Press Drives And Press Lines (AREA)
  • Medicinal Preparation (AREA)

Description

Die Erfindung bezieht sich auf eine Tablettenpresse nach dem Oberbegriff des Patentanspruchs 1. Die Erfindung bezieht sich insbesondere auf eine Tablettenpresse, deren Rotor eine aus Segmenten bestehende Matrizenscheibe aufweist.The invention relates to a tablet press according to the preamble of claim 1. The invention relates in particular to a tablet press whose rotor has a matrix disc consisting of segments.

Eine typische Tablettenpresse ist eine sogenannte Rundlaufpresse. Wenn vorstehend und nachstehend von Tablettenpressen die Rede ist, sind naturgemäß auch solche Rundlaufpressen gemeint, mit denen beliebig andere Presslinge hergestellt werden können, beispielsweise im Nahrungsmittel-, Waschmittel- oder sonstigem Bereich.A typical tablet press is a so-called rotary press. Whenever tablet presses are mentioned above and below, naturally also those rotary presses are meant with which any desired other compacts can be produced, for example in the food, detergent or other sector.

Der typische Aufbau einer Rundlaufpresse ist die Lagerung eines Rotors in einem Pressengestell, wobei der Rotor Bohrungen aufweist für die Führung von Ober- und Unterstempeln, zwischen denen eine Matrizenscheibe angeordnet ist mit Matrizenbohrungen, mit denen die Stempel während des Umlaufs des Rotors zusammenwirken. Die Pressstempel werden in Druckstationen von Druckrollen betätigt und außerhalb von diesen über Steuerkurven geführt.The typical structure of a rotary press is the bearing of a rotor in a press frame, wherein the rotor has bores for the guidance of upper and lower punches between which a die plate is arranged with die holes with which the stamp interact during the rotation of the rotor. The press dies are actuated in printing stations by pressure rollers and guided outside of these via control cams.

Der Rotor wird von einem geeigneten Antriebsmotor angetrieben. In diesem Zusammenhang ist auch bekannt geworden, einen elektrischen Motor in einen Rotor zu integrieren, wobei der Läufer des elektrischen Motors außen liegt und in Eingriff ist mit der Innenwandung des Rotors. Der Rotor ist zumeist einteilig geformt. Auch die Matrizenscheibe kann einteilig mit dem Rotor ausgebildet sein.The rotor is driven by a suitable drive motor. In this context, it has also become known to integrate an electric motor in a rotor, wherein the rotor of the electric motor is on the outside and is in engagement with the inner wall of the rotor. The rotor is mostly molded in one piece. The die plate may be formed integrally with the rotor.

Aus DE 101 59 114 ist jedoch auch bekannt geworden, die Matrizenscheibe aus einzelnen Segmenten zusammenzusetzen. Die Segmente werden in geeigneter Art und Weise im Rotor festgelegt. Aus dem genannten Dokument ist auch bekannt geworden, die Segmente mit Hilfe von Druck-Gewinde-stiften gegen eine Widerlagerfläche des Rotors anzupressen. Aus JP 06-49000 ist eine Rundlaufpresse bekannt geworden mit einer aus zwei Ringsegmenten bestehenden Matrizenscheibe. Mittels einer Befestigungsvorrichtung können die Ringsegmente an einem Schaft der Rundlaufpresse befestigt werden. Eine weitere Rundlaufpresse ist bekannt aus JP 10-305395 , die ebenfalls eine aus mehreren Ringsegmenten aufgebaute Matrizenscheibe aufweist. Schließlich ist aus US 2003/031744 A1 eine Rundlaufpresse bekannt geworden, die Mittel umfasst, mit denen eine Matrizenscheibe entnommen werden kann.Out DE 101 59 114 However, it has also become known to assemble the die plate from individual segments. The segments are set in a suitable manner in the rotor. It has also become known from the cited document to press the segments by means of pressure-threaded pins against an abutment surface of the rotor. Out JP 06-49000 a rotary press has become known with a consisting of two ring segments Matrizenscheibe. By means of a fastening device, the ring segments can be attached to a shaft of the rotary press. Another rotary press is known from JP 10-305395 also comprising a die plate made up of a plurality of ring segments. Finally is off US 2003/031744 A1 a rotary press has become known, comprising means with which a die plate can be removed.

Der Erfindung liegt die Aufgabe zugrunde, eine Tablettenpresse mit segmentierter Matrizenscheibe so auszubilden, dass auf einfache Weise vorgegebene Spannkräfte auf die Matrizensegmente aufgebracht werden können.The invention has the object of providing a tablet press with segmented die plate in such a way that predetermined clamping forces can be applied to the die segments in a simple manner.

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

Bei der Erfindung ist im Gestell der Tablettenpresse mindestens eine Antriebsvorrichtung für die Spannelemente angeordnet mit einem in der Höhe verstellbaren Antriebselement, das wahlweise mit dem unteren Ende des Spannelements in Eingriff bringbar ist.In the invention, at least one drive device for the clamping elements is arranged in the frame of the tablet press with a height adjustable drive element, which is selectively engageable with the lower end of the clamping element in engagement.

Wie im Stand der Technik ist das Spannelement durch einen Durchgang in Rotor hindurchgeführt und in Anlage mit der Unterseite des zugeordneten Matrizensegments in Eingriff bringbar. Eine Antriebsvorrichtung, die elektrisch, hydraulisch oder pneumatisch arbeiten kann, ist dazu dafür ausgelegt, auf das Spannelement eine axiale Druckkraft entweder direkt oder indirekt aufzubringen, um mit dem Spannelement eine vorgegebene Spannkraft auf das zugehörigen Matrizensegment auszuüben. Die Antriebsvorrichtung ist stationär im Gestell angeordnet, wodurch der Rotor durch entsprechende Drehung so eingestellt werden muss, dass Antriebselement und Spannelement zueinander ausgerichtet sind, wenn das Spannelement betätigt werden soll.As in the prior art, the tension member is passed through a passage in the rotor and in abutment with the underside of the associated Matrices segment engageable. A drive device, which can operate electrically, hydraulically or pneumatically, is designed to apply an axial compressive force either directly or indirectly to the clamping element in order to exert a predetermined clamping force on the associated matrix segment with the clamping element. The drive device is arranged stationary in the frame, whereby the rotor must be adjusted by appropriate rotation so that the drive element and clamping element are aligned with each other when the clamping element is to be actuated.

Mit Hilfe der Erfindung lässt sich das Spannen der Matrizenelemente automatisieren, und es ist nicht erforderlich, über eine Bedienperson eine vorgegebene Kraft auf das Spannelement aufzubringen, beispielsweise mit Hilfe eines Drehmomentenschlüssels. Beim manuellen Spannen der Segmente muss der Bediener die notwendige Spannkraft bzw. Lösekraft selbst aufbringen. Daher kann geschehen, dass die notwendige Verspannung nicht gewährleistet ist. Bei eingebauten Tablettierwerkzeugen ist das manuelle Spannen und Lösen nur schwer oder gar nicht durchführbar.With the aid of the invention, the clamping of the die elements can be automated, and it is not necessary to apply a predetermined force to the clamping element via an operator, for example with the aid of a torque wrench. When manually clamping the segments, the operator must apply the necessary clamping force or release force himself. Therefore, it may happen that the necessary tension is not guaranteed. With built-in tableting tools, manual clamping and releasing is difficult or even impossible.

Vorteilhafte Ausgestaltungen der Erfindung sind in Unteransprüchen angegeben.Advantageous embodiments of the invention are specified in subclaims.

Eine Ausgestaltung der Erfindung sieht vor, dass der Rotor von einem stationären Gehäuse umgeben ist, das dichtend mit dem Rotor zusammenwirkt und einen Prozessraum bildet und die unteren Enden der Spannelemente außerhalb des Prozessraums liegen. Der Prozessraum ist so ausgeführt, dass er im Wesentlichen den Rotor umgibt, jedoch die oberen und unteren Bereiche des Rotors freilässt. Der Prozessraum ist daher relativ klein, ermöglicht dadurch aber auch ein Reinigen aller dem Prozessraum zugekehrten Teile, ohne dass ein Ausbau von Stempeln oder dergleichen erforderlich wird. Es ist daher nach einer weiteren Ausgestaltung der Erfindung auch von Vorteil, wenn die Spannelemente dichtend durch die Durchführung hindurchgeführt sind in den Prozessraum hinein. Die Antriebsvorrichtung liegt hingegen außerhalb des Prozessraums. Beim Umrüsten muss daher nicht im eingeengten Raum gearbeitet werden. Auch die dem Prozessraum zugekehrten Abschnitte der Spannelemente können durch Reinigung innerhalb des Prozessraums mit gereinigt und müssen daher nicht ausgebaut werden.An embodiment of the invention provides that the rotor is surrounded by a stationary housing, which cooperates sealingly with the rotor and forms a process space and the lower ends of the clamping elements are outside the process space. The process space is designed to substantially surround the rotor but leave the top and bottom portions of the rotor free. The process space is therefore relatively small, but thereby also allows a cleaning of all the process space facing parts without the removal of stamps or the like is required. It is therefore also advantageous according to a further embodiment of the invention, when the clamping elements are sealingly passed through the passage into the process space. The drive device, however, is outside the process space. When retrofitting therefore must not be worked in confined space. Also, the process space facing portions of the clamping elements can be cleaned by cleaning within the process room with and therefore need not be removed.

Es sind verschiedene Ausführungsformen denkbar, die Spannelemente axial in Anlage mit den Segmenten der Matrizenscheibe zu bringen. Eine Ausführungsform der Erfindung sieht vor, dass dem unteren Ende des Spannelements ein Spindelantrieb zugeordnet ist und eine Drehantriebsvorrichtung vorgesehen ist, deren Drehspindel mit dem Spindelantrieb koppelbar ist. In diesem Zusammenhang ist in einer weiteren Ausgestaltung der Erfindung vorgesehen, dass die Antriebsvorrichtung mit einer Hubvorrichtung im Gestell verbunden ist. Es ist jedoch auch ein Drehantrieb denkbar, dessen Drehspindel axial verstellbar ist, um in Eingriff mit dem Spindelantrieb des Spannelements gebracht zu werden.Various embodiments are conceivable for bringing the clamping elements axially into contact with the segments of the die plate. An embodiment of the invention provides that the lower end of the clamping element is associated with a spindle drive and a rotary drive device is provided, the rotary spindle can be coupled to the spindle drive. In this context, in a further embodiment the invention provides that the drive device is connected to a lifting device in the frame. However, it is also conceivable a rotary drive, the rotary spindle is axially adjustable to be brought into engagement with the spindle drive of the clamping element.

Eine Matrizenscheibe besteht aus mehreren Segmenten, beispielsweise aus fünf Segmenten. Eine Ausgestaltung sieht vor, dass pro Segment zwei oder mehr Spannelemente vorgesehen sind. Dadurch ist ein gleichmäßiges Spannen der Segmente erreichbar, insbesondere, wenn nach einer weiteren Ausgestaltung der Erfindung parallele Antriebsvorrichtungen gleichzeitig betrieben werden.A die plate consists of several segments, for example of five segments. One embodiment provides that two or more clamping elements are provided per segment. As a result, a uniform clamping of the segments can be achieved, in particular, if, according to a further embodiment of the invention, parallel drive devices are operated simultaneously.

Es ist zwar denkbar, im Gestell die Zahl der Antriebsvorrichtungen gleich der Zahl der Spannelemente zu wählen. Der Aufwand hierfür ist relativ hoch. Es kann daher nach einer Ausgestaltung der Erfindung auch eine geringere Anzahl von Antriebsvorrichtungen verwendet werden, wenn eine Steuervorrichtung für den Drehmotor des Rotors so ausgelegt ist, dass der Rotor in vorgegebenen Drehstellungen positionierbar ist, um das Antriebselement mit dem Spannelement auszurichten.Although it is conceivable to choose in the frame, the number of drive devices equal to the number of clamping elements. The effort for this is relatively high. It can therefore be used according to an embodiment of the invention, a smaller number of drive devices when a control device for the rotary motor of the rotor is designed so that the rotor can be positioned in predetermined rotational positions to align the drive element with the clamping element.

Ausführungsbeispiele der Erfindung werden nachfolgend anhand von Zeichnungen näher erläutert.

Fig. 1
zeigt perspektivisch ein Segment eines Rotors der erfindungsgemäßen Tablettenpresse in Seitenansicht.
Fig. 2
zeigt perspektivisch eine ähnliche Ansicht wie Fig. 1, jedoch von schräg unten.
Fig. 3
zeigt die Seitenansicht eines Rotors nach der erfindungsgemäßen Tablettenpresse mit einer schematisch angedeuteten Spannvorrichtung für ein Matrizensegment.
Fig. 4
zeigt eine ähnliche Darstellung wie Fig. 3 mit zwei Spannelementen für ein Segment der Matrizenscheibe.
Fig. 5
zeigt wiederum eine ähnliche Darstellung wie die Fig. 4 mit einer Einzelheit bezüglich der Betätigung von Spannelementen.
Fig. 6
zeigt eine Draufsicht auf eine segmentierte Matrizenscheibe mit Spannvorrichtungen nach Fig. 5.
Fig. 7
zeigt eine Einzelheit eines Spindeltriebs für die Betätigung eines Spannelements nach der Erfindung.
Fig. 8
zeigt einen Schnitt durch die Darstellung nach Fig. 7 entlang der Linie 8-8.
Fig. 9
zeigt den Schnitt nach Fig. 8 eingesetzt in einen Rotor gemäß Fig. 1 bzw. 2.
Fig. 10
zeigt die Seitenansicht eines Teils eines Rotors mit zwei parallelen Antriebsvorrichtungen.
Embodiments of the invention will be explained in more detail with reference to drawings.
Fig. 1
shows in perspective a segment of a rotor of the tablet press according to the invention in side view.
Fig. 2
shows in perspective a similar view as Fig. 1 but from diagonally below.
Fig. 3
shows the side view of a rotor according to the tablet press according to the invention with a schematically indicated clamping device for a die segment.
Fig. 4
shows a similar representation as Fig. 3 with two clamping elements for one segment of the die plate.
Fig. 5
again shows a similar representation as the Fig. 4 with a detail regarding the operation of clamping elements.
Fig. 6
shows a plan view of a segmented die plate with jigs after Fig. 5 ,
Fig. 7
shows a detail of a spindle drive for the operation of a clamping element according to the invention.
Fig. 8
shows a section through the illustration Fig. 7 along the line 8-8.
Fig. 9
shows the cut after Fig. 8 used in a rotor according to Fig. 1 or 2.
Fig. 10
shows the side view of a portion of a rotor with two parallel drive devices.

Die Fign. 1 und 2 zeigen ein Segment eines Rotors 10 für eine Tablettenpresse, wie sie allgemein im Stand der Technik bekannt ist. Der Rotor weist eine obere Stempel führung 12 und eine untere Stempelführung 14 auf, welche Führungsbohrungen 16 bzw. 18 haben, die nicht gezeigte Pressstempel aufnehmen. Nur als Beispiel wird für die Aufnahme der Pressstempel auf die DE 10 2004 040 163 hingewiesen. Der Rotor 10 wird von einem nicht gezeigten Antriebsmotor in Drehung versetzt. Der Motor kann gemäß der zuletzt genannten Druckschrift in den Rotor 10 integriert sein. Der Rotor 10 ist auf einer Säule eines nicht gezeigten Gestells für die Tablettenpresse drehbar gelagert. Auch dies ist in DE 10 2004 040 163 beschrieben.The FIGS. 1 and 2 show a segment of a rotor 10 for a tablet press, as is well known in the art. The rotor has an upper punch guide 12 and a lower punch guide 14, which guide bores 16 and 18, record the press dies, not shown. Just as an example, for recording the press die on the DE 10 2004 040 163 pointed. The rotor 10 is rotated by a drive motor, not shown in rotation. The engine may be integrated into the rotor 10 according to the last-mentioned document. The rotor 10 is rotatably mounted on a column of a frame, not shown, for the tablet press. This too is in DE 10 2004 040 163 described.

Der Rotor 10 nimmt eine Matrizenscheibe auf, welche aus einzelnen Segmenten 20 zusammengesetzt ist. Fig. 6 zeigt die Draufsicht auf eine Matrizenscheibe mit fünf zu einem Kreis angeordneten Segmenten, welche Bohrungen 22 aufweisen. In den Fign. 1 und 2 ist jeweils ein Spannstempel bzw. Spannelement 24 gezeigt, der sich durch einen Durchgang in der Unterstempelführung 14 hindurch erstreckt in Anlage an die Unterseite des Segments 20, um das Segment gegen eine radiale Widerlagerfläche 26 anzupressen.The rotor 10 receives a die plate, which is composed of individual segments 20. Fig. 6 shows the top view of a die plate with five arranged in a circle segments having holes 22. In the FIGS. 1 and 2 In each case, a tensioning die or tensioning element 24 is shown, which extends through a passage in the lower punch guide 14, in abutment against the underside of the segment 20, in order to press the segment against a radial abutment surface 26.

Wie aus den Fign. 1 und 2 hervorgeht, sind Oberstempel- und Unterstempelaufnahme 12, 14 einteilig geformt.Like from the FIGS. 1 and 2 As can be seen, upper punch and lower punch holder 12, 14 are integrally formed.

Fig. 3 zeigt die Seitenansicht eines Rotors 10a, der im Wesentlichen dem Rotor 10 nach den Fign. 1 und 2 gleicht. Es ist ein einziges Matrizensegment 20 angedeutet, das gegen eine Widerlagerfläche 26 angepresst ist, und zwar mit Hilfe eines Spannelements 24a. Wie durch Pfeil 28 angedeutet, kann das Spannelement 24a in Achsrichtung bzw. in seiner Länge verändert werden. Zu diesem Zweck ist eine Antriebsvorrichtung 44 vorgesehen, die mit dem nicht gezeigten Gestell der Tablettenpresse verbunden ist. Fig. 3 shows the side view of a rotor 10a, which is substantially the rotor 10 after the FIGS. 1 and 2 like. It is indicated a single die segment 20, which is pressed against an abutment surface 26, by means of a clamping element 24a. As indicated by arrow 28, the clamping element 24a can be changed in the axial direction or in its length. For this purpose, a drive device 44 is provided, which is connected to the frame of the tablet press, not shown.

Durch gestrichelte Linien ist bei 32 in Fig. 3 angedeutet, wie ein Gehäuse um den Rotor 10a herum erstreckt ist. Es wirkt abdichtend mit dem Rotor 10a zusammen und bildet einen Pressraum 34. Bei 36 ist in Fig. 3 eine Dichtung gezeigt, die das Spannelement 24a abdichtet, so dass auch an dieser Stelle der Pressraum 34 gegenüber der Umgebung abgedichtet ist.Dashed lines is at 32 in Fig. 3 indicated as a housing is extending around the rotor 10a around. It acts sealingly with the rotor 10a together and forms a baling chamber 34. At 36 is in Fig. 3 a seal is shown, which seals the clamping element 24a, so that at this point the pressing space 34 is sealed from the environment.

Der Rotor nach Fig. 4 gleicht dem nach Fig. 3, ist daher mit dem gleichen Bezugszeichen versehen. Er ist gegenüber Fig. 3 um 90° verdreht gezeigt. Man sieht, dass das Segment 20 mit Hilfe von zwei in Umfangsrichtung beabstandeten Spannelementen 24a, 24b gegen die Widerlagerfläche 26 des Rotors 10a gepresst ist. Es sind somit zwei Antriebe 42, 44 vorgesehen, die gleichzeitig über die Spannelemente 24a, 24b das Segment 20 im Rotor 10a festlegen.The rotor after Fig. 4 resembles this Fig. 3 , is therefore provided with the same reference numeral. He is opposite Fig. 3 shown rotated by 90 °. It can be seen that the segment 20 is pressed against the abutment surface 26 of the rotor 10a by means of two circumferentially spaced clamping elements 24a, 24b. Thus, two drives 42, 44 are provided, which simultaneously fix the segment 20 in the rotor 10a via the clamping elements 24a, 24b.

In Fig. 5 ist wiederum der gleiche Rotor wie in den Fign. 3 und 4 gezeigt und hat daher auch dasselbe Bezugszeichen. Die Antriebsvorrichtungen 42, 44 sind über Hubvorrichtungen 30a, 30b auf einer Plattform 40 des sonst nicht gezeigten Gestells der Tablettenpresse angeordnet gezeigt. Die Antriebsvorrichtungen 42, 44 betätigen drehend Antriebs- oder Kupplungselemente 46. Die Antriebselemente 46 können jedoch nicht nur in Drehung versetzt werden, sondern auch sich gemäß Pfeil 28 axial mit den Antriebsvorrichtungen 42, 44 bewegt werden. Dies geschieht durch die Hubvorrichtungen 30a, 30b, welche die Antriebsvorrichtungen 42, 44 in der Höhe bewegen. Die Antriebs- und Kupplungselemente 46 haben am oberen Ende einen Steg, der mit einer Ausnehmung 48 von Spannelementen 50, 52 in Eingriff bringbar ist, um eine Spindel oder dergleichen in Drehung zu versetzen. Diese Drehung führt dazu, dass am anderen Teil der Spannelemente 50, 52 sich achsparallel bewegt und das Segment 20 anpresst oder freigibt. In Fig. 6 ist dies im Hinblick auf das obere Segment 20 gezeigt. Auch hier können die beiden Spannelemente 50, 52 gleichzeitig betätigt werden, um das Segment 20 gleichmäßig gegen die Widerlagerfläche des Rotors anzupressen.In Fig. 5 is in turn the same rotor as in the FIGS. 3 and 4 shown and therefore has the same reference number. The drive devices 42, 44 are shown via lifting devices 30a, 30b arranged on a platform 40 of the otherwise not shown frame of the tablet press. The drive devices 42, 44 rotationally actuate drive or coupling elements 46. However, the drive elements 46 can not only be rotated, but also be moved axially with the drive devices 42, 44 as indicated by arrow 28. This is done by the lifting devices 30a, 30b, which move the drive devices 42, 44 in height. The drive and coupling elements 46 have at the upper end a web, the with a recess 48 of clamping elements 50, 52 is engageable to enable a spindle or the like in rotation. This rotation causes the other part of the clamping elements 50, 52 moves axially parallel and the segment 20 presses or releases. In Fig. 6 this is shown with respect to the upper segment 20. Again, the two clamping elements 50, 52 can be actuated simultaneously to evenly press the segment 20 against the abutment surface of the rotor.

In Fig. 6 kann ferner erkannt werden, dass zu jedem Segment 20 zwei Spannelemente gehören, beispielsweise die Spannelemente 50, 52, wobei für alle Spannelemente 50, 52 nur zwei Antriebsvorrichtungen 42, 44 vorgesehen sind. Für das Verspannen der Segmente ist daher der Rotor 10a jeweils um einen vorgegebenen Winkel zu drehen, um die Spannelemente 50, 52 mit den Antriebs- oder Kupplungselementen 46 auszurichten.In Fig. 6 It can further be recognized that each segment 20 includes two clamping elements, for example the clamping elements 50, 52, wherein only two drive devices 42, 44 are provided for all clamping elements 50, 52. For the clamping of the segments, therefore, the rotor 10a is to be rotated in each case by a predetermined angle in order to align the clamping elements 50, 52 with the drive or coupling elements 46.

In Fig. 9 ist ein Beispiel für ein Spannelement gezeigt, der gemäß Fign. 1 und 2 ein Segment 20 gegen die Widerlagerfläche 26 anpresst. Wie ferner zu erkennen ist, befindet sich ein Stempel 60 innerhalb einer Buchse 62, die am unteren Ende einen Flansch 64 aufweist. In Fig. 2 ist zu erkennen, wie der Flansch 64 in einer Ausnehmung der unteren Stempelführung 14 aufgenommen und darin befestigt ist. Die Bewegung des Stempels 60 nach unten ist durch einen inneren Absatz in der Buchse 62 begrenzt.In Fig. 9 an example of a tensioning element is shown according to FIGS. 1 and 2 a segment 20 presses against the abutment surface 26. As will be further appreciated, a plunger 60 is within a bushing 62 which has a flange 64 at the lower end. In Fig. 2 It can be seen how the flange 64 is received in a recess of the lower punch guide 14 and secured therein. The downward movement of the punch 60 is limited by an internal shoulder in the sleeve 62.

Eine Gewindespindel 66 ist in eine Innengewindebohrung 68 des Stempels 60 mittig eingeschraubt. Die Gewindespindel 66 stützt sich über einen radialen Flansch 70 auf dem inneren Absatz ab. Am unteren Ende weist die Gewindespindel 66 einen Sechskantkopf 72 auf, der sich innerhalb einer unteren Ausnehmung 74 der Buchse 62 befindet.A threaded spindle 66 is screwed centrally into an internally threaded bore 68 of the punch 60. The threaded spindle 66 is supported via a radial flange 70 on the inner shoulder. At the lower end, the threaded spindle 66 has a hexagonal head 72, which is located within a lower recess 74 of the sleeve 62.

Wird über den Sechskantkopf 72 die Gewindespindel 66 verdreht, wird dadurch der Stempel 60 axial verstellt. In einem seitlichen radial durchgehenden Schlitz 76 der Buchse 62 befindet sich ein Kopf 78 einer radial in den Stempel 60 eingeschraubten Schraube 80. Der Kopf 78 kann sich um einen gewissen Betrag achsparallel im Schlitz 76 bewegen, verhindert jedoch eine Drehbewegung des Stempels 60.If the threaded spindle 66 is rotated via the hexagonal head 72, the punch 60 is thereby displaced axially. In a lateral radially continuous slot 76 of the bush 62 is a head 78 of a screwed radially into the punch 60 screw 80. The head 78 can move axially parallel in the slot 76 by a certain amount, but prevents rotational movement of the punch 60th

In Fig. 10 ist zu erkennen, wie auf dem Pressengestell 40 eine Halterung 60a für einen Hubzylinder 62a angeordnet ist. Der Hubzylinder betätigt eine Traverse 64a, die mit Armen 68a, 70a verschraubt ist und die am anderen Ende mit dem Gehäuse von Antriebsmotoren 72a, 74a verbunden sind. Durch die Betätigung des Hubzylinders 62a kann mithin die Anordnung der beiden Antriebsmotoren 72a, 74a in der Höhe verstellt werden. Die Antriebsmotoren 72a, 74a weisen eine Welle 76a bzw. 78a auf, die in einer Führungshülse 80a, 82a laufen und die am Ende ein Kupplungselement 84, 86 aufweisen. Die Antriebsmotoren 72a, 74a sind z.B. pneumatische Motoren, mit deren Hilfe die Kupplungselemente 84, 86 in Drehung versetzt werden können. Zu diesem Zweck sind die Motoren 72a, 74a mit Anschlüssen 88, 90 für Druckluft versehen.In Fig. 10 It can be seen how a holder 60a for a lifting cylinder 62a is arranged on the press frame 40. The lift cylinder actuates a crossbar 64a which is bolted to arms 68a, 70a and which are connected at the other end to the housing of drive motors 72a, 74a. By the operation of the lifting cylinder 62a, therefore, the arrangement of the two drive motors 72a, 74a can be adjusted in height. The drive motors 72a, 74a have a shaft 76a or 78a, which run in a guide sleeve 80a, 82a and at the end of a coupling element 84, 86 have. The Drive motors 72a, 74a are, for example, pneumatic motors with the aid of which the coupling elements 84, 86 can be set in rotation. For this purpose, the motors 72a, 74a are provided with connections 88, 90 for compressed air.

In Fig. 10 ist auch der untere Teil des Rotors 10 teilweise angedeutet mit den Spannelementen 24. Wie zu erkennen, sind die Kupplungselemente 84, 86 zu den in der Mitte gezeigten Spannelementen 24 ausgerichtet. Wird nun mit Hilfe des Hubzylinders 82 die gesamte Anordnung nach oben bewegt, bewegen sich die Kupplungselemente 84, 86, wie dies bereits weiter oben beschrieben wurde, durch einen Durchgang in der unteren Stempelführung, um mit einer in Fig. 10 nicht gezeigten Spindel der Spannelemente in Drehverbindung zu treten. Der Spindelantrieb kann z.B. in der Weise ausgeführt sein, wie dies anhand der Fign. 8 und 9 dargestellt ist. Mit Hilfe der in Fig. 10 gezeigten Vorrichtung können daher zwei Spannelemente 24 für jeweils ein Segment 20 gleichzeitig betätigt werden. Sollen die Spannelemente für ein weiteres Matrizensegment betätigt werden, wird der Rotor 10 um den entsprechenden Winkel weitergedreht, bis wiederum die Kupplungselemente 84, 86 mit den zugehörigen Spannelementen 24 ausgerichtet sind.In Fig. 10 is also the lower part of the rotor 10 partially indicated with the clamping elements 24. As can be seen, the coupling elements 84, 86 are aligned with the clamping elements 24 shown in the middle. If the entire arrangement is now moved upwards with the aid of the lifting cylinder 82, the coupling elements 84, 86 move, as has already been described above, through a passage in the lower punch guide in order to engage in a Fig. 10 not shown spindle of the clamping elements in rotary connection to occur. The spindle drive can be carried out, for example, in the manner as shown by the FIGS. 8 and 9 is shown. With the help of in Fig. 10 As shown, therefore, two clamping elements 24 can be actuated simultaneously for one segment 20 each. If the clamping elements are to be actuated for a further die segment, the rotor 10 is further rotated by the corresponding angle, until in turn the coupling elements 84, 86 are aligned with the associated clamping elements 24.

Claims (10)

  1. A tablet press with a rotor (10, 10a), which is rotatably mounted in a frame of the tablet press and which has a top punch receiver for the top punches and a bottom punch receiver for the bottom punches of the tablet press as well as a die plate with a series of die holes (22), which are aligned with the top and bottom punches, wherein the die plate consists of at least two ring segments (20), which are attachable to the rotor (10, 10a) by means of a fastening device, wherein tensioning elements (50, 52; 60, 62) are arranged in axially parallel, circumferentially spaced passages of the rotor (10, 10a), which act from below against the ring segments (20) and tension against an abutment surface of the rotor (10, 10a), characterized in that, in the frame (40) of the tablet press, at least one electrically, pneumatically or hydraulically acting drive device (42, 44) is arranged for the tensioning elements (50, 52; 60, 62) with a height-adjustable coupling element (46, 72) which optionally can be brought to engage with the lower end of the tensioning elements (50, 52; 60, 62).
  2. The tablet press according to claim 1, characterized in that the rotor (10, 10a) is surrounded by a stationary housing (32), which works together with the rotor (10, 10a) in a sealing manner and forms a process space (34), and the lower ends of the tensioning elements (50, 52; 60, 62) lie outside of the process space (34).
  3. The tablet press according to claim 2, characterized in that the tensioning elements (50, 52; 60, 62) are guided in a sealing manner in the passages of the rotor (10, 10a).
  4. The tablet press according to one of claims 1 to 3, characterized in that a spindle drive is assigned to the bottom end of the tensioning element and a rotary drive is provided, the rotary spindle of which can be coupled with the spindle drive.
  5. The tablet press according to one of claims 1 to 4, characterized in that the drive device is connected with a lifting device (30a, 30b) in the frame.
  6. The tablet press according to one of claims 1 to 5, characterized in that two tensioning elements (60, 62 or respectively 50, 52) are provided per segment (20 or respectively 24).
  7. The tablet press according to one of claims 1 to 6, characterized in that at least two drive devices (40, 42) are arranged parallel to each other.
  8. The tablet press according to one of claims 1 to 7, characterized in that a drive motor for the rotor (10, 10a) has a control device, which is designed so that the rotor is positionable in specified rotational positions relative to the drive device (30a, 30).
  9. The tablet press according to one of claims 4 to 8, characterized in that a bushing (62) is received in a torque-proof manner in a bore hole of the rotor (10), which guides a punch (60) axially parallel in the rotor (10), a threaded spindle (60) is screwed into a threaded bore hole of the punch (60) that is open to the bottom, which is supported axially on the bushing (62) and the lower end of the threaded spindle (66), an engagement surface (72) for the engagement with the threaded spindle (66) of the rotary drive.
  10. The tablet press according to claim 9, characterized in that an elongated axially parallel slit (76) is shaped in the bushing (62), in which a head (78) of a screw (80) is received, which is screwed into the punch (60) radially through the slit (76).
EP08019180.2A 2008-01-25 2008-11-03 Tablet press Not-in-force EP2082867B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008006045A DE102008006045B4 (en) 2008-01-25 2008-01-25 tablet press

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EP2082867A2 EP2082867A2 (en) 2009-07-29
EP2082867A3 EP2082867A3 (en) 2011-04-20
EP2082867B1 true EP2082867B1 (en) 2016-01-13

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US (1) US7641466B2 (en)
EP (1) EP2082867B1 (en)
DE (1) DE102008006045B4 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011101288B4 (en) * 2011-05-10 2013-11-14 Fette Compacting Gmbh Process for operating a plant for the production of tablets and corresponding plant
CN105555514A (en) 2013-05-16 2016-05-04 科施股份公司 System and method for exchanging vertically segmented rotor segments on a rotary tablet press
DE102013114693A1 (en) * 2013-12-20 2015-06-25 Fette Engineering GmbH Stuffing stamp station and method of filling capsules in a stuffing stamp station
DE102014113211B4 (en) * 2014-05-07 2020-01-23 Fette Compacting Gmbh Rotary press
JP5866405B2 (en) * 2014-05-14 2016-02-17 株式会社畑鉄工所 Powder compression molding machine
GB2621378A (en) * 2022-08-10 2024-02-14 I Holland Ltd A die table segment

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2914201C2 (en) * 1979-04-07 1982-12-02 Wilhelm Fette Gmbh, 2053 Schwarzenbek Tablet machine
DE9003241U1 (en) * 1990-03-17 1990-06-13 Korsch Maschinenfabrik, 1000 Berlin Rotary press
JPH0756155Y2 (en) * 1992-12-04 1995-12-25 株式会社菊水製作所 Rotary tablet machine
JP3847412B2 (en) * 1997-05-02 2006-11-22 株式会社村田製作所 Rotary powder compression molding equipment
ITBO20010141A1 (en) * 2001-03-16 2002-09-16 Ima Spa COMPRESSING MACHINE FOR THE PRODUCTION OF TABLETS
US6830442B2 (en) * 2001-08-09 2004-12-14 William Alvin Cecil Rotary tablet press
DE10159114B4 (en) * 2001-12-01 2004-02-19 Wilhelm Fette Gmbh Rotor for a tablet press
DE102004040163C5 (en) * 2004-08-19 2009-06-18 Fette Gmbh Rotary tablet press
DE202005001556U1 (en) * 2005-01-31 2006-03-16 Kilian Gmbh & Co. Kg Matritzenscheibe for rotary tablet press and rotary tablet press

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EP2082867A2 (en) 2009-07-29
DE102008006045A1 (en) 2009-07-30
DE102008006045B4 (en) 2010-06-24
US20090191297A1 (en) 2009-07-30
EP2082867A3 (en) 2011-04-20
US7641466B2 (en) 2010-01-05

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