EP1714775A2 - Procédé et appareil pour la simulation le mouvement avec friction d'au moins un poinçon supérieur et/ou d'au moins un poinçon inférieur dans une presse pour comprimés à table rotative - Google Patents

Procédé et appareil pour la simulation le mouvement avec friction d'au moins un poinçon supérieur et/ou d'au moins un poinçon inférieur dans une presse pour comprimés à table rotative Download PDF

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Publication number
EP1714775A2
EP1714775A2 EP06112845A EP06112845A EP1714775A2 EP 1714775 A2 EP1714775 A2 EP 1714775A2 EP 06112845 A EP06112845 A EP 06112845A EP 06112845 A EP06112845 A EP 06112845A EP 1714775 A2 EP1714775 A2 EP 1714775A2
Authority
EP
European Patent Office
Prior art keywords
rotor
punch
lower punch
upper punch
force
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.)
Withdrawn
Application number
EP06112845A
Other languages
German (de)
English (en)
Other versions
EP1714775A3 (fr
Inventor
Michael Matthes
Walter Hegel
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.)
Korsch AG
Original Assignee
Korsch AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Korsch AG filed Critical Korsch AG
Publication of EP1714775A2 publication Critical patent/EP1714775A2/fr
Publication of EP1714775A3 publication Critical patent/EP1714775A3/fr
Withdrawn legal-status Critical Current

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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 method and a device for simulating a stiffness of at least one upper punch and / or at least one lower punch of a rotary tablet tableting machine.
  • a rotor of the rotary tableting machine is set in rotation by means of a drive machine.
  • the rotor comprises at least one die with associated upper punches and lower punches.
  • the matrices are filled with a molding compound and depending on the angular position of the rotor guided over guide curves lower punch and upper punch are axially displaced to the matrices.
  • the lower and upper punches are guided past at least one pressing station, usually at a pre-pressing station and a main pressing station.
  • the upper and lower punches of stationary pressure rollers are guided substantially tangentially, so that a pressing force can be applied to the introduced in the matrices molding compound.
  • tablets of consistent quality for example in the pharmaceutical sector
  • a pressing force of the upper punch or lower punch on the molding compound is of great importance, since under the condition of the same material properties of the filled into the matrices molding compound is a direct relationship between tablet weight and necessary for the production of tablets pressing force.
  • each tablet weight is assigned a specific pressing force at a tablet shape predetermined by the pressing tools and a set tablet height.
  • the upper punch and lower punch rotate synchronously with the dies and are axially displaced via guide curves, so that it comes to the necessary strokes of the upper punch and lower punch. Due to a wide variety of events, for example wear, abrasion, residues of pressing agent or the like, a so-called stiffness of individual upper punches and / or lower punches can occur. On the one hand, this binding leads to no longer reproducible conditions for the production of tablets. On the other hand, as a result of the stiffness of the upper punches and / or lower punches, since they rotate at a relatively high speed, severe mechanical damage to the rotary tablet tableting machine can occur.
  • the guide curve of the upper punch and / or lower punch is coupled in a defined angular position of the rotor with strain gauges, so that a resulting due to a sluggishness of Oberstempeln and / or Unterstkovn deflection can be detected on the guide curve.
  • a switching threshold can be specified, from when a stop signal for the rotary tableting machine is generated.
  • the invention is therefore based on the object of specifying a method and a device of the generic type, by means of which in a simple manner an accurate calibration of rotary tableting machines on measurement of a defined stiffness of Oberstkovn and / or Unterstkovn is possible.
  • a defined force generating means wherein the means of at least one die of a rotor of a rotary tableting machine is assignable such that upon rotation of the rotor in at least one defined angular position of the rotor, a defined force on at least one upper punch and /or at least a lower punch is exercisable, is advantageously a defined binding of the at least one upper punch and / or at least one lower punch simulated.
  • the solution according to the invention makes it possible in particular to carry out the measurements for static and also for dynamic processes.
  • the binding can be assigned by the individual detection of the signals individual stamp stations.
  • FIG. 1 shows, in a schematic partial view, the development of a rotor 12 of a rotary tablet-type tableting machine designated as a whole by.
  • the rotor 12 has over its circumference a plurality of spaced dies 14.
  • Each die 14 is associated with a lower punch 16 and an upper punch 18, which are guided over here indicated guide curves 20 and 22 respectively.
  • Rotor 12 and lower punch 16 and upper punch 18 rotate synchronously about the axis of rotation of the rotor 12.
  • the rotor 12 is rotatable by an electric drive machine 24 only indicated here.
  • a so-called Einhellschuh here only indicated mass 26.
  • Einhellschuh here only indicated mass 26.
  • the filling level can be defined for example by the altitude of the lower punch 16 at a stripping station, not shown.
  • the lower punch 16 and the upper punch 18 dive into the die 14 and press the molding compound 26 to the desired tablet or the like.
  • the lower punches 16 and the upper punches 18 are guided past at least one pressing station 28, which comprises fixedly arranged pressure rollers 30.
  • the pressure rollers 30 are each rotatably mounted about a rotation axis 32. The distance between the pressure rollers 30 to each other is defined and ultimately determines the height of the tablet to be pressed.
  • the lower punch 16 and upper punch 18 reach this In abutting contact with the peripheral surface 38 of the pressure rollers 30 and thus put them, so to speak by entrainment, in rotation.
  • the rotor 12 rotates at a speed n R
  • the pressure rollers 30 rotate at a speed n D.
  • the upper punch 18 and the lower punch 16 are merely indicated within the course of the guide curves 22 and 20, respectively - According to the illustration on the third pair of stamps from the left - guides 38 and 40, which rotate synchronously with the rotor 12, according to the indicated double arrows 42 relative to the matrices 14 hin- or moved away.
  • the leadership of the upper punch 18 and lower punch 16 in the respective guides 38 and 40 is free of play and without relevant friction losses, so that the force applied via the pressure rollers 30 pressing force on the molding compound 26 is independent of the leadership of the upper punch 18 and the lower punch 16.
  • the momentary pressing force can be determined in a manner known per se by means of measuring transducer 44 integrated into the pressure rollers 30.
  • a so-called binding of individual upper punches 18 or individual lower punches 16 may occur. That is, between the upper punches 18 and lower punches 16 moving relative to the dies 14 corresponding to the double arrows 42 and the respective guides 38 and 40, frictional forces superimposed on the pressing force of the pressure rollers 30 occur.
  • Cause of such binding can be, for example, between the upper punch 18 and the lower punch 16 and the guides 38 and 40 arrived press material 26, material defects on the upper dies 18 and Unterstempeln 16 and / or the guides 38 and 40 and / or wear.
  • a stiffness of the upper punch 18 and / or the lower punch 16 also carries the risk of mechanical damage or, in extreme cases, a mechanical destruction of components of the rotary tableting machine 10.
  • the guide curves 20 and / or 22 in difficult Unterstempeln 16 and / or Oberstkovn 18, in particular in areas in which the stamps in the matrices 14 in and out of the matrices 14 are moved, are acted upon by large forces.
  • the guide cam 22 is operatively connected to a sensor 46 which detects a deflection of the guide cam 22 in the direction of movement (double arrow 42) of the upper punches 18.
  • the sensor 46 is preferably arranged in a region of the guide curve 22 in which the upper punches 18 are moved in the direction of the dies 14.
  • the guide curve 20 is operatively connected to a sensor 48, which detects a deflection of the guide curve 20 in the direction of movement (double arrow 42) of the lower punch 16.
  • the sensor 48 is in this case preferably arranged at a location of the guide curve 20, on which the lower punches 16 are moved in the direction of the dies 14.
  • the deflection of the guide curve 22 or guide curve 20 does not necessarily have to be exactly in the direction of movement (double arrow 42) of the upper punches 18 or lower punch 16 are measured.
  • the sensors 46 and 48 can also be a deflection of the guide curves 22 and 20 in the rotational direction of the rotor 12 or in an angular position between an imaginary vertical through the upper punch 18 and the lower punch 16 and the rotational direction of the rotor 12 are.
  • the sensors 46 and 48 are connected to a control unit 50 via here indicated control lines 52 and 54, wherein the control unit 50 in response to the signals supplied by the sensors 46 and 48, the electric drive machine 24 and thus the rotary tabletting machine 10 out of operation can.
  • the sensors 46 and 48 are designed as analog sensors. By coupling the sensors 46 and 48 to the controller 50, a binary function of the analog signals provided by the sensors 46 and 48 is virtually implemented. Of course, binary sensors can also be used instead of analog sensors.
  • the use of the sensors 46, 48 associated with control devices 50 is merely optional. Thus, the outputs of the sensors 46, 48 can be fed directly into a machine control and evaluated there.
  • FIG. 2 shows, in a schematic representation, the rotor 12 which can be driven by the electric drive machine 24.
  • the guide curve 22 is associated with the sensor 46 and the guide curve 20 of the sensor 48.
  • the sensors 46 and 48 are connected to the controller 50 via the signal lines 52 and 54.
  • the control unit 50 can - in addition to the function described here - take on a variety of other control and regulation functions for the rotary tableting machine 10. It is also possible to assign each of the sensors 46 and 48 a separate control unit.
  • the sensors 46 and 48 provide different signals depending on a mechanical deflection of the guide cam 22 and the guide cam 20.
  • three switching thresholds are set, wherein at a deflection of the guide curve of 1.2 mm, a signal s ist1 , at a deflection of 1.5 mm a signal s ist2 or at a displacement of 1.9 mm a signal s ist3 is delivered.
  • the signal s ist3 is always present in the normal operating state .
  • the distance between the guide cam 22 or the guide cam 20 and the associated sensor 46 or 48 decreases so that, corresponding to the actual measured distance, for example 1.5 mm, the signal s is 2 or Distance 1.2 mm the signal s ist1 is applied.
  • the control unit 50 comprises a computing unit 56 which is the signal s delivered by the sensors 46 and 48, respectively , and a comparison signal s v supplied by a memory means 58.
  • the signal provided by the memory means 58 may be retrievable from a programmable table or the like, which signal may be dependent, inter alia, on a type of rotary tableting machine 10, a geometry of the upper punches 18 and the lower punches 16, respectively, of a nominal speed n R of FIG Rotor 12 and / or other machine-type-dependent signals.
  • a control signal n D is supplied via the arithmetic unit 56 to the drive machine 24, by means of which the rotational speed n of the rotor 12 can be controlled or regulated. That's the way it is possible to reduce the speed n of the rotor 12 and to stop the rotor 12 completely.
  • a device 60 is explained, by means of which the sensors 46 and 48 can be calibrated to a binding to be detected.
  • This device 60 is shown in a sectional view during its intended use.
  • the device 60 is in this case associated with a die 14 of the rotor 12 of the rotary tableting machine 10.
  • the device 60 forms an adjustment section 62, by means of which the device 60 is arranged exactly in the region of a die 14.
  • the device 60 is further planar on the rotor 12.
  • the device 60 also has a defined position with respect to a top punch 18, which is already closer within the guide 38 -as in particular with reference to FIG explained - by a not shown in Figure 3 guide cam 22 corresponding to the double arrow 42 relative to the die 14 is movable.
  • the device 60 forms a pressure chamber 64, which is bounded on the one hand by a bottom 66 and on the other hand by a rolling diaphragm 68.
  • the rolling diaphragm 68 is clamped in a sealing manner via sealing elements 70, which are merely indicated here, within the device 60, so that the pressure chamber 64 is pressure-tight.
  • the rolling diaphragm 68 acts on a plunger 72, which forms on its side facing away from the rolling diaphragm 68 a flat pressure surface 74.
  • a defined internal pressure p is generated in the pressure chamber 64.
  • an axial force acting on the plunger 72 is generated via the rolling diaphragm 68.
  • a defined pressure p can be generated in the pressure chamber 64.
  • a defined force F can be assigned to the respective pressure p before the intended use of the device 60. It can thus be determined, if the pressure p has a value X, a force F acts with a value Y on the plunger 72.
  • the force F 50 N and so on Intermediates can be set so very accurate values for the force F.
  • Such a metered device 60 is then used for its intended use in a die 14 of the rotor 12.
  • the rotor 12 is now set at a measuring speed n m in rotation.
  • the guide cam 22 of the upper punch 18 reaches a defined angular position of the rotor 12 with its pressure surface 76 in abutting contact with the pressure surface 74 of the plunger 72.
  • the defined set force F acts on the upper punch 18, which in turn this force F on the Guide curve 22 transmits.
  • the arranged on the guide cam 22 sensor 46 supplies as a result of the associated deflection of the guide cam 22 a signal s mess .
  • the force F is known, according to the measured signal s mess this can be assigned directly to the respective force F. In this way, the sensor 46 can be calibrated to a certain force F.
  • the force F is set at typical values for stiffness of the upper punches 18, as they might occur during the use of the rotary tableting machine 10. Since the calibration of the sensor 46 during a rotation, ie during a the actual operating state imitating situation, a defined binding of the upper punch 18 can be simulated. This allows for gauging the rotary tableting machine 10 prior to initial start-up or after maintenance and / or repair to obtain reproducible conditions for the production of tablets or the like.
  • the device 60 shown in FIG. 3 can also be used for the calibration of the sensor 48 for the guide curve 20 of the lower punches 16.
  • a deflection not shown in detail, the contact pressure of the lower punch 16 in the direction of the die 14 of the rotor 12 by an apparatus 60 having adjacent die 14 can be deflected onto the pressure surface 74 of the device 60.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Medicinal Preparation (AREA)
EP06112845A 2005-04-20 2006-04-20 Procédé et appareil pour la simulation le mouvement avec friction d'au moins un poinçon supérieur et/ou d'au moins un poinçon inférieur dans une presse pour comprimés à table rotative Withdrawn EP1714775A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE200510019132 DE102005019132B4 (de) 2005-04-20 2005-04-20 Verfahren und Vorrichtung zur Kalibrierung einer Rundläufer-Tablettiermaschine durch Simulation einer Schwergängigkeit wenigstens eines Oberstempels und/oder wenigstens eines Unterstempels

Publications (2)

Publication Number Publication Date
EP1714775A2 true EP1714775A2 (fr) 2006-10-25
EP1714775A3 EP1714775A3 (fr) 2008-07-30

Family

ID=36571916

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06112845A Withdrawn EP1714775A3 (fr) 2005-04-20 2006-04-20 Procédé et appareil pour la simulation le mouvement avec friction d'au moins un poinçon supérieur et/ou d'au moins un poinçon inférieur dans une presse pour comprimés à table rotative

Country Status (2)

Country Link
EP (1) EP1714775A3 (fr)
DE (1) DE102005019132B4 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012152373A1 (fr) * 2011-05-10 2012-11-15 Fette Compacting Gmbh Dispositif et procédé d'étalonnage et d'ajustement d'un dispositif de mesure d'une presse à comprimés
CN105115662A (zh) * 2015-09-17 2015-12-02 北京国药龙立自动化技术有限公司 一种压片机压力校准装置
EP3501811A1 (fr) * 2017-12-21 2019-06-26 Fette Compacting GmbH Procédé de régulation de la vitesse de rotation de rotor d'un rotor d'une presse à comprimés rotative et presse à comprimés rotative
WO2021079259A1 (fr) * 2019-10-23 2021-04-29 I.M.A. Industria Macchine Automatiche S.P.A. Presse à comprimés et procédé de compression

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007052552B4 (de) 2007-10-29 2010-01-07 Luxner, Peter, Dipl.-Ing. Verfahren und Vorrichtung zur Ermittlung von Steuer- und Regelparametern für Tablettenpressen
DE102014006372A1 (de) 2014-05-05 2015-11-05 Gkn Sinter Metals Engineering Gmbh Schichten eines Wasserstoffspeichers und deren Herstellung

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE565869C (de) * 1928-07-28 1932-12-08 Johann Peter Spengler Drehtischpresse, die mit Ober- und Unterstempel arbeitet
DE1627931C3 (de) * 1967-12-11 1973-11-08 Kilian & Co Gmbh, 5000 Koeln Tablettenpresse
DE3930127A1 (de) * 1989-09-09 1991-03-21 Fette Wilhelm Gmbh Rundlauf-tablettiermaschine
DE19733969A1 (de) * 1997-07-23 1999-01-28 Kilian & Co Gmbh Rundlauf-Tablettenpresse
DE19854074A1 (de) * 1998-11-24 2000-05-25 Henkel Kgaa Verfahren zur Serienfertigung von Formkörpern mit geringer Härteschwankung
ITBO20040014A1 (it) * 2004-01-14 2004-04-14 Ima Spa Macchina comprimitrice per la produzione di compresse

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012152373A1 (fr) * 2011-05-10 2012-11-15 Fette Compacting Gmbh Dispositif et procédé d'étalonnage et d'ajustement d'un dispositif de mesure d'une presse à comprimés
CN103717386A (zh) * 2011-05-10 2014-04-09 菲特压片机械有限公司 用于校准和补偿压片机的测量装置的装置和方法
US9664582B2 (en) 2011-05-10 2017-05-30 Fette Compacting Gmbh Device and method for calibrating and balancing a measuring device of a tablet press
CN105115662A (zh) * 2015-09-17 2015-12-02 北京国药龙立自动化技术有限公司 一种压片机压力校准装置
EP3501811A1 (fr) * 2017-12-21 2019-06-26 Fette Compacting GmbH Procédé de régulation de la vitesse de rotation de rotor d'un rotor d'une presse à comprimés rotative et presse à comprimés rotative
WO2021079259A1 (fr) * 2019-10-23 2021-04-29 I.M.A. Industria Macchine Automatiche S.P.A. Presse à comprimés et procédé de compression
KR20220084390A (ko) * 2019-10-23 2022-06-21 아이.엠.에이. 인듀스트리아 마친 오토메티크 에스.피.에이. 정제 프레스 기계 및 압축 방법
CN114667212A (zh) * 2019-10-23 2022-06-24 I·M·A·工业机械自动装置股份公司 压片机及压制方法
JP2022553064A (ja) * 2019-10-23 2022-12-21 アイエムエー、インドゥストリア、マッキーネ、アウトマティケ、ソチエタ、ペル、アチオニ タブレットプレス機および圧縮方法

Also Published As

Publication number Publication date
DE102005019132B4 (de) 2007-08-16
EP1714775A3 (fr) 2008-07-30
DE102005019132A1 (de) 2006-10-26

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