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EP2105291B1 - Dispositif et procédé de mesure de la position verticale de poinçons supérieurs et inférieurs d'une presse rotative pour comprimés - Google Patents

Dispositif et procédé de mesure de la position verticale de poinçons supérieurs et inférieurs d'une presse rotative pour comprimés Download PDF

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Publication number
EP2105291B1
EP2105291B1 EP09003349.9A EP09003349A EP2105291B1 EP 2105291 B1 EP2105291 B1 EP 2105291B1 EP 09003349 A EP09003349 A EP 09003349A EP 2105291 B1 EP2105291 B1 EP 2105291B1
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EP
European Patent Office
Prior art keywords
rotor
scale
measured
lower punch
vertical
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.)
Active
Application number
EP09003349.9A
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German (de)
English (en)
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EP2105291A3 (fr
EP2105291A2 (fr
Inventor
Ingo Schmidt
Keno Freyer
Werner Seifert
Wolfram Lämmerhirt
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
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Fette GmbH
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Publication date
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Publication of EP2105291A3 publication Critical patent/EP2105291A3/fr
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Publication of EP2105291B1 publication Critical patent/EP2105291B1/fr
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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
    • 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
    • B30B11/005—Control arrangements

Definitions

  • the invention relates to a device and a method according to claim 1 and 9 for measuring the vertical position of a rotatably driven rotor of a rotary tablet press paired and synchronously with the rotor rotating upper and lower punches during a rotor rotation in certain areas along the circumference perform a vertical movement of their rotary motion.
  • Rotary tablet presses have long been known.
  • the rotor of such presses usually has a die plate with a plurality of circumferentially spaced dies.
  • the rotor is equipped with a number of press punches of the press forming upper and lower punches, each die a lower punch and a punch are assigned.
  • each ram is subject at certain positions of the circumference, in particular at the pressing stations of the press, to a vertical movement which results in a corresponding force on material to be pressed filled in the dies.
  • an ejector station In addition to a pre-press and a main press station, an ejector station must also be considered.
  • the vertical movement of the ram is usually performed by guide curves. For example, by stationary pressure rollers in the pressing stations, a pressing force is applied to the heads of the ram and thus on the material to be pressed. Depending on the composition of the tablets to be compressed while a predetermined pressing force is observed.
  • Press force measuring devices have been used in rotary tablet presses for many years to monitor and control the pressing process to ensure the desired tablet quality. However, it is not always sufficient, in particular in the pharmaceutical laboratory and development sector, to assess the compression process via the press force measurement. Therefore, additional measures must be used. Of outstanding importance for determining the compression characteristics of molding compounds is the force-displacement diagram. Physically, it describes the energy expenditure during the compression phase. From this conclusions can be drawn on the compressibility and properties of the substances to be seized.
  • An incremental position measuring system comprising a ruler and a sensor, which is arranged in a housing and is located in a stationary die table.
  • a boom attached to the punch of the press actuates a ram of the incremental measuring system, as soon as the stamp moves down. For a displacement measurement, therefore, a mechanical contact between the boom and position measuring system is required.
  • an incremental measuring system is known, which comprises a arranged on a base plate dividing section.
  • the present invention seeks to provide a device and a method of the type mentioned, with which in a simple manner, a reliable and accurate measurement of the vertical position of the ram at each circumferential position of the stamp is possible.
  • At least one, preferably more, and more preferably all, of the upper and / or lower punches is a scale, in particular a linear scale, for measuring lengths in the manner of a Scale or ruler.
  • the reading device co-rotating with the rotor and the punches can read the scale and in this way measure the vertical position of the respective press ram.
  • the vertical position of at least one upper and / or lower punch along the entire circumference of its rotational movement by reading the scale can be measured with the device according to the invention during at least one rotor rotation by means of the reading device. According to the invention, a precise and reliable measurement of the vertical position or movement of the punches is possible in a simple manner.
  • the scale allows an absolute measurement of the vertical position or movement.
  • the measurement can be carried out in the inventive method at regular intervals over the scope of the rotational movement of the stamp. It is only decisive that measurement data is collected over the entire circumference and not only in the compression phase in the pressing stations of the press, as in the prior art ( DE 10 2005 051 567 A1 ) is provided.
  • vertical punch paths can also be measured in the up and pull-down curves or in the filling area of the press in which the material to be pressed is filled into the matrices. In this way, even unpredictable vertical stamp movements can be detected and analyzed.
  • the reading device comprises a sensor for reading the scale.
  • At least one evaluation device for determining the vertical position from the read-out scale data may be associated with the reading device (s).
  • all the rams can have a scale, so that their vertical position can be determined. This can be a corresponding number of the scales be assigned to each associated reading devices.
  • Each reading device can be assigned its own evaluation device. However, it can also be provided a common evaluation device for several or all reading devices.
  • the device according to the invention is particularly suitable for carrying out the method according to the invention.
  • the inventive method can be carried out with a device according to the invention, wherein the vertical positions of the at least one upper and / or lower punch are measured by means of the reading device by reading the scale.
  • a rotary tablet press with a rotatably driven rotor and the rotor paired and synchronously rotating with the rotor upper and lower punches, which during a rotation of the rotor in certain areas along the circumference of its rotational movement a vertical Execute movement, wherein the rotary tablet press has a device according to the invention.
  • the rotor in a conventional manner have a die plate with a plurality of matrices, which in turn is associated with a plurality of upper and lower punches in pairs.
  • each of the punches undergoes vertical movement at certain positions of the circumference, resulting in a force on material to be pressed inserted in the dies.
  • the leadership of the stamp can be done in a conventional manner via guide curves.
  • a main pressing station is also to be considered, in particular, an ejection station, on each of which a vertical movement of the stamp takes place.
  • the pressing force for pressing the tablet material can for example be applied by stationary pressure rollers on the heads of the ram.
  • the scale can be an incremental scale, ie a line measure, which represents a length by the distance of graduation markings.
  • the scale may also be an absolute scale, in particular an absolute coded scale, e.g. Has numerical values at which the vertical position of the respective stamp is absolutely readable.
  • the reading device can be designed to read the scale optically, magnetically, capacitively and / or inductively. Accordingly, the scale may be optically, magnetically, capacitively and / or inductively readable.
  • the reading device can for this purpose have an optical, magnetic, capacitive and / or inductive sensor.
  • the scale can be arranged on a circumferential surface of the respective upper and / or lower punch, in particular be introduced into the peripheral surface.
  • the reading device can also be arranged in a structurally particularly simple manner on a receptacle of the respective upper and / or lower punch.
  • the scale may be arranged on or in the stamp such that its readable section faces outwards in the circumferential direction.
  • the reading device can be attached to the stamp holder at a small distance from the scale. In particular, it may be arranged so that the in the stamp integrated scale with rotating rotor and a vertical movement of the respective stamp also vertically past the reader device and in particular the measuring window of the reading device.
  • a transmitting device which also rotates synchronously with the rotor and a receiving device arranged stationarily outside the rotor can be provided, wherein position data measured by the reading device by means of the transmitting device can be transmitted wirelessly to the receiving device.
  • the reading device can read out the incremental pulses or the absolutely coded position of the respective stamp at any time and supply this information to the transmitter attached to the rotor.
  • the wireless data transmission between the transmitting device and the receiving device can take place, for example, by radio.
  • the data received by the receiving device can be routed to a control and / or operating device, for example, also stationarily arranged outside the rotor, for further processing.
  • the evaluation of the data read out to position data can be done in the reading device or in the transmitting device or in the receiving device or in the control and / or operating device.
  • the reading and transmitting device can also form a combined device.
  • a wireless transmission of the position data to the external receiving device can take place in a direct manner.
  • the external receiving device or the control device or the operating device can then from the received position data on the condition and operation of the system close and, if necessary, countermeasures, such as a stop of the plant cause.
  • the device has a rotary encoder, with which the circumferential positions of at least one upper and / or lower punch taken during a rotor rotation can be measured, wherein the vertical positions of the at least one upper and / or lower punch measured by the reading device correspond to the one with the Rotary encoder measured circumferential positions of the respective upper and / or lower punch can be assigned.
  • the rotary encoder can be, for example, a so-called angle encoder. It is then an incremental or absolute measurement of the rotational movement of the stamp, in particular the angular positions along the scope of their rotational movement possible. Subsequently, the evaluating device assigns the measured vertical positions to the circumferential positions.
  • the circumferential positions of all stamps can be measured and assigned to the respective vertical positions.
  • the evaluation device carries out the assignment between vertical and circumferential movements.
  • the evaluation device can be the same device which also performs the determination of the vertical position data from the data measured by the reading device. Such an evaluation device can be integrated in the reading device.
  • it can also be arranged separately and, for example, also rotate synchronously with the rotor or be integrated into other devices of the device, such as a rotary encoder or a transmitting device.
  • it can also be arranged in a stationary manner outside the rotor, for example integrated in a receiving device or a control or operating device.
  • Fig. 1 a rotary tablet press. Such presses are known per se to the person skilled in the art.
  • the press has a by means of a drive device, not shown, for example, an electric motor, rotatably driven rotor 12.
  • the rotor 12 has a die plate 14 with a plurality of die holes 16.
  • Each die 16 are associated in pairs with a punch 18 and a lower punch 20.
  • the upper and lower punches 18, 20 are respectively held on an upper punch holder 22 and a lower punch holder 24 and rotate upon rotation of the rotor 12 in synchronism therewith, as shown for the upper punch holder 22 by the arrow 26 illustrating the direction of rotation.
  • the upper and lower punches 18, 20 are also guided in a conventional manner by guide curves.
  • Fig. 1 A filling curve 28, a metering curve 30 and an ejection curve 32 for the lower punches 20 are shown by way of example.
  • a pull-down curve 34 and an elevation curve 36 are shown.
  • tablet material to be tabletted in powder form is filled into the dies 16 of the die plate 14.
  • an upper pre-pressure roller 40 and a lower pre-pressure roller 42 of a pre-pressing station the powdery material is pre-pressed in the dies 16.
  • upper and lower main pressure rollers 44, 46 in a conventional manner, the final compression in the main press station.
  • the compressed tablets 48 are then on the surface of the die plate 14 and routed in a stripping device 50 into an exit channel 52 for further use.
  • a stamp pair is in Fig. 1 exemplified a device according to the invention for measuring the vertical position of a punch 20 and a lower punch 20 shown.
  • a parallel to the vertical direction of movement of the respective upper and lower punch 18, 20 extending scale 54, in particular length scale, are arranged on a top punch 18 and a lower punch 20 respectively.
  • the superconstäbe 54 are introduced into the peripheral surface of the respective upper punch 18 and lower punch 20.
  • the scales 54 may be, for example, incremental scales or absolutely coded scales.
  • two measuring devices 54 assigned to the scales 54 are provided.
  • the reading devices 56 in the illustrated example magnetic reading devices, are arranged on the upper punch holder 22 and the lower punch holder 24 and thus also rotate synchronously with the rotor 12.
  • the scales 54 and their associated reading devices 56 do not move horizontally relative to each other ,
  • FIG Fig. 4 The arrangement of the readers 56 with respect to the scales 54 is shown in FIG Fig. 4 shown enlarged.
  • the reading devices 56 are attached at a small distance from the scales 54 on the respective punch holder 22, 24.
  • the scales 54 are so inserted into the peripheral surface of the punch 18, 20 that they are in the circumferential direction of the rotational movement of the Stamp 18, 20 point outward.
  • the scales 54 integrated into the punches 18, 20 move in the vertical direction past the measuring window of the reading devices 56.
  • the reading devices 56 read the incremental pulses or the absolutely coded positions of the punches 18, 20 at each point in time of the rotary movement.
  • An evaluation device respectively integrated into the reading devices 56 determines therefrom the vertical positions or movements of the punches 18, 20 along the entire circumference of their rotary movements.
  • the evaluation devices can also be provided separately from the reading devices 56.
  • a common evaluation device for several, in particular all reading devices is possible.
  • an angle encoder not shown, is provided, with which the circumferential positions of the punches 18, 20 taken during a rotor rotation can be measured.
  • the vertical positions of the punches 18, 20 measured with the reading devices 56 can be assigned to the circumferential positions of the punches 18, 20 measured with the angle encoder. In this way, a complete monitoring of the punch movements in both the vertical and in the direction of rotation is possible.
  • the position data determined by the reading device 56 are subsequently sent to a transmitting device 58 which is likewise arranged on the rotor and rotates with the rotor 12, as illustrated by the arrow 57.
  • the measured position data becomes wireless, For example, by radio, sent to a stationary outside of the rotor 12 receiving device 60, as illustrated by the arrow 62.
  • the position data can be sent to a control device 64, which is likewise arranged stationarily outside the rotor, as illustrated by the arrow 66.
  • the data may be sent by the control device 64 to a control device 68 by means of corresponding control commands for controlling the tablet press, as illustrated by the arrow 70.
  • the control device 64 can influence it by means of suitable control commands, provided that the determined position data deviate from desired position data, so that the desired tablet quality is reliably guaranteed at all times.
  • On the operating device 68 corresponding instructions for an operator can be output or appropriate inputs of the operator to be received.
  • the position data received by the receiving device 60 are sent directly to the operating device 68 without passing through the control device, as indicated by the arrow 72 in FIG Fig. 5 illustrated. In this case, the operator of the system can manually compare the determined position data with target data and, for example, also manually initiate appropriate countermeasures.
  • press dies of the press may have a device according to the invention with corresponding associated reading devices.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)

Claims (12)

  1. Dispositif de mesure de la position verticale de poinçons supérieurs et inférieurs attribués par paires à un rotor entraîné de façon rotative d'une presse rotative pour comprimés et mis en rotation de façon synchrone avec le rotor, lesquels effectuent un mouvement vertical pendant une rotation du rotor dans certaines régions le long de l'ampleur de son mouvement de rotation,
    dans lequel il est prévu au moins une graduation (54) disposée sur au moins un poinçon supérieur et/ou inférieur (18, 20) et s'étendant parallèlement à la direction de déplacement verticale du poinçon supérieur et/ou inférieur (18, 20) respectif, et
    au moins un dispositif de lecture (56) attribué à la graduation (54) et tournant également de façon synchrone avec le rotor (12), avec lequel une position verticale du poinçon supérieur et/ou inférieur (18, 20) respectif peut être mesurée en lisant la graduation (54),
    dans lequel le dispositif présente un encodeur permettant de mesurer les positions circonférentielles d'au moins un poinçon supérieur et/ou inférieur (18, 20) prises pendant une rotation du rotor,
    dans lequel les positions verticales de l'au moins un poinçon supérieur et/ou inférieur (18, 20) mesurées à l'aide du dispositif de lecture (56) peuvent être attribuées aux positions circonférentielles du poinçon supérieur et/ou inférieur (18, 20) respectif mesurées à l'aide de l'encodeur au moyen d'un dispositif d'évaluation.
  2. Dispositif selon la revendication 1, caractérisé en ce que la graduation (54) est une graduation incrémentale.
  3. Dispositif selon la revendication 1, caractérisé en ce que la graduation (54) est une graduation absolue.
  4. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le dispositif de lecture (56) est conçu pour lire la graduation (54) de façon optique, magnétique, capacitive et/ou inductive.
  5. Dispositif selon l'une des revendications précédentes, caractérisé en ce que la graduation (54) est disposée sur une surface circonférentielle du poinçon supérieur et/ou inférieur (18, 20) respectif, en particulier incorporée dans la surface circonférentielle.
  6. Dispositif selon l'une des revendications précédentes, caractérisé en ce que le dispositif de lecture (56) est disposé sur une admission (22, 24) du poinçon supérieur et/ou inférieur (18, 20) respectif.
  7. Dispositif selon l'une des revendications précédentes, caractérisé en ce qu'il est prévu un dispositif d'émission (58) tournant également de façon synchrone avec le rotor (12) et un dispositif de réception (60) disposé fixement à l'extérieur du rotor (12), dans lequel des données de position mesurées par le dispositif de lecture (56) peuvent être envoyées sans fil au dispositif de réception au moyen du dispositif d'émission (58).
  8. Presse rotative pour comprimés, comprenant un rotor entraîné de façon rotative et des poinçons supérieurs et inférieurs attribués par paires au rotor et mis en rotation de façon synchrone avec le rotor, lesquels effectuent un mouvement vertical pendant une rotation du rotor dans certaines régions le long de l'ampleur de son mouvement de rotation, caractérisée par un dispositif selon l'une des revendications 1 à 7.
  9. Procédé de mesure de la position verticale de poinçons supérieurs et inférieurs attribués par paires à un rotor entraîné de façon rotative d'une presse rotative pour comprimés et mis en rotation de façon synchrone avec le rotor, lesquels effectuent un mouvement vertical pendant une rotation du rotor dans certaines régions le long de l'ampleur de son mouvement de rotation.
    dans lequel, pendant au moins une rotation de rotor, des positions verticales d'au moins un poinçon supérieur et/ou inférieur (18, 20) sont mesurées le long de toute l'ampleur de son mouvement de rotation, dans lequel les positions circonférentielles d'au moins un poinçon supérieur et/ou inférieur (18, 20) prises pendant une rotation du rotor sont mesurées, dans lequel les positions verticales mesurées de l'au moins un poinçon supérieur et/ou inférieur (18, 20) sont attribuées aux positions circonférentielles mesurées du poinçon supérieur et/ou inférieur (18, 20) respectif.
  10. Procédé selon la revendication 9, caractérisé en ce que celui-ci est exécuté à l'aide d'un dispositif selon l'une des revendications 1 à 8, dans lequel les positions verticales de l'au moins un poinçon supérieur et/ou inférieur (18, 20) sont mesurées au moyen du dispositif de lecture (56) en lisant la graduation (54).
  11. Procédé selon l'une des revendications 9 ou 10, caractérisé en ce que la graduation (54) est lue de façon optique, magnétique, capacitive et/ou inductive par le dispositif de lecture (56).
  12. Procédé selon l'une des revendications 9 à 11, caractérisé en ce que des données de position mesurées par le dispositif de lecture (56) sont envoyées sans fil à un dispositif de réception (60) disposé fixement à l'extérieur du rotor (12), au moyen d'un dispositif d'émission (58) tournant également de façon synchrone avec le rotor (12).
EP09003349.9A 2008-03-27 2009-03-07 Dispositif et procédé de mesure de la position verticale de poinçons supérieurs et inférieurs d'une presse rotative pour comprimés Active EP2105291B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102008015820A DE102008015820B4 (de) 2008-03-27 2008-03-27 Vorrichtung und Verfahren zur Messung der vertikalen Position von Ober- und Unterstempeln einer Rundläufer-Tablettenpresse

Publications (3)

Publication Number Publication Date
EP2105291A2 EP2105291A2 (fr) 2009-09-30
EP2105291A3 EP2105291A3 (fr) 2012-12-05
EP2105291B1 true EP2105291B1 (fr) 2017-05-03

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EP09003349.9A Active EP2105291B1 (fr) 2008-03-27 2009-03-07 Dispositif et procédé de mesure de la position verticale de poinçons supérieurs et inférieurs d'une presse rotative pour comprimés

Country Status (3)

Country Link
US (1) US7988440B2 (fr)
EP (1) EP2105291B1 (fr)
DE (1) DE102008015820B4 (fr)

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DE102008046422B3 (de) * 2008-09-09 2009-11-12 Fette Gmbh Verfahren zum Prüfen von Mehrschichttabletten in einer Mehrfachrundläuferpresse
FR2951989B1 (fr) * 2009-10-30 2012-02-03 Medelpharm Installation pour la realisation d'un produit solide a partir d'un ou de plusieurs materiaux pulverulents
DE102010011995A1 (de) 2010-03-17 2011-09-22 Peter Luxner Verfahren und Vorrichtung zum Verpressen von Pulver und Granulat
DE202010003848U1 (de) 2010-03-17 2010-07-15 Luxner, Peter, Dipl.-Ing. Vorrichtung zum Verpressen von Pulver und Granulat
DE102011101287B4 (de) * 2011-05-10 2013-11-14 Fette Compacting Gmbh Abstreifeinrichtung für eine Rundläuferpresse, Rundläuferpresse und Verfahren zum Betreiben einer Rundläuferpresse
FR2984798B1 (fr) * 2011-12-22 2014-01-31 Centre Nat Rech Scient Presse haute pression comprenant des moyens pour translater et tourner l'une par rapport a l'autre les enclumes entre lesquelles la haute pression est appliquee et dispositif de commande associe.
EP3308944B1 (fr) * 2016-10-17 2021-04-14 Gabler Thermoform GmbH & Co. KG Procédé et installation pour le thermoformage
ES2943517T3 (es) * 2020-04-08 2023-06-13 Heidenhain Gmbh Dr Johannes Disposición para medición de posición

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DE7521472U (de) * 1975-10-30 Fette W Gmbh Rundläufer-Tablettiermaschine
GB1216397A (en) * 1968-04-02 1970-12-23 Keith Marshall Improvements in or relating to tablet forming machines
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US5211964A (en) * 1991-05-20 1993-05-18 Westinghouse Electric Corp. Press machine with means to adjust punching force
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DE9302249U1 (de) * 1993-02-17 1993-04-01 Wilhelm Fette Gmbh, 2053 Schwarzenbek Satz von Preßstempeln für eine Tablettiermaschine
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DE202007015275U1 (de) * 2007-10-29 2008-05-08 Luxner, Peter, Dipl.-Ing. Vorrichtung zur Ermittlung von Steuer- und Regelparametern für Tablettenpressen

Also Published As

Publication number Publication date
EP2105291A3 (fr) 2012-12-05
DE102008015820B4 (de) 2013-02-28
US20090243132A1 (en) 2009-10-01
EP2105291A2 (fr) 2009-09-30
US7988440B2 (en) 2011-08-02
DE102008015820A1 (de) 2009-10-01

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