EP1445093B1 - Méthode et dispositif pour le contrôle d'une presse pour comprimés à table rotative - Google Patents

Méthode et dispositif pour le contrôle d'une presse pour comprimés à table rotative Download PDF

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Publication number
EP1445093B1
EP1445093B1 EP03090036A EP03090036A EP1445093B1 EP 1445093 B1 EP1445093 B1 EP 1445093B1 EP 03090036 A EP03090036 A EP 03090036A EP 03090036 A EP03090036 A EP 03090036A EP 1445093 B1 EP1445093 B1 EP 1445093B1
Authority
EP
European Patent Office
Prior art keywords
rotor
speed
compressive force
rotational speed
pressing 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.)
Expired - Fee Related
Application number
EP03090036A
Other languages
German (de)
English (en)
Other versions
EP1445093A1 (fr
Inventor
Ulrich Noack
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
Priority to DE50300536T priority Critical patent/DE50300536D1/de
Priority to EP03090036A priority patent/EP1445093B1/fr
Priority to ES03090036T priority patent/ES2242141T3/es
Priority to US10/774,641 priority patent/US7136717B2/en
Priority to JP2004032413A priority patent/JP3940401B2/ja
Publication of EP1445093A1 publication Critical patent/EP1445093A1/fr
Application granted granted Critical
Publication of EP1445093B1 publication Critical patent/EP1445093B1/fr
Priority to JP2007030222A priority patent/JP4549356B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0094—Press load monitoring means
    • 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 controlling a rotary tabletting machine, wherein a rotor by a prime mover in rotation is offset, the rotor at least one Die with associated upper punches and lower punches includes and one in the at least one Die filled molding compound acting pressing force is determined.
  • Rotary tableting machines of the generic type Art are known. It is typical that the rotor by starting the engine from standstill is brought to its rated speed. At least a filling shoe, the matrices with the molding compound filled and depending on the angular position of the rotor are guided by guide curves under stamps and Upper punch axially displaced to the matrices.
  • the Lower and upper stamp are at least one Pressing station, usually at a pre-press station and a main press station, passed by. There will be the upper and lower punches arranged on stationary Pressure rollers guided substantially tangentially, so that on the introduced in the matrices Press mass a pressing force can be applied.
  • the invention is therefore based on the object Method and a device of the generic To create kind, by means of which such damages avoided can be.
  • this object is achieved by a method solved with the features mentioned in claim 1.
  • the object is further by a Device for controlling a rotary tabletting machine according to the method of claim 1 with the features mentioned in claim 8 solved.
  • a control unit or the like for driving a prime mover of a rotor of the rotary tableting machine a facility for Determining a pressing force and means for comparing the determined pressing force with a predetermined Press force and at least one means of pretending a target speed of the rotor in dependence of Comparison of the determined pressing force with the predefinable Pressing force is advantageous, in a simple way, a control function in the rotary tabletting machine to implement that in Dependence of a degree of filling of matrices of the rotor a target speed of the rotor controls. This will in particular adapted to the degree of filling of the matrices Run-up of the rotor possible, so in particular mechanical loads / damages of Pressure rollers and / or press punches are avoided can.
  • FIG. 1 shows a schematic partial view the settlement of a rotor 12 of a total of 10 designated rotary tableting machine.
  • the rotor 12 has a plurality of spaced over its circumference Matrices 14.
  • Each female 14 is a lower stamp 16 and a top stamp 18 assigned to the over here indicated guide curves 20 and 22 are performed.
  • Rotor 12 and lower punch 16 and upper punch 18 rotate synchronously around the Rotary axis of the rotor 12.
  • the rotor 12 is through a here only indicated electric drive machine 24 rotatable.
  • a so-called Einhellschuh here only hinted Pressed mass 26 filled.
  • the rotary tabletting machine 10 becomes the molding compound 26 filled over the entire height of the die 14.
  • the filling level can, for example, by the Altitude of the lower punch 16 at a not shown Abstreifstation be defined.
  • Im shown Example assumes an abnormal filling.
  • the molding compound 26 is only partial filled in the molds 14. It is also conceivable that into the matrices 14 - not for the one assumed here normal case - filled no molding compound 26 is.
  • These states can, for example, at restart the rotary tableting machine 10 after a cleaning, maintenance or the like or after Interruption of replenishment of the molding compound 26 via enter the filling device.
  • 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 enter here 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 molding compound 26 to be pressed opposes the punches 16 or 18 in the pressing station 28 or in the region immediately preceding the pressing station 28 only an insufficient counterforce.
  • the pistons 16 and 18 are accelerated to the nominal rotational speed of the rotor 12 by rotation of the rotor 12, they are not accelerated to their rated rotational speed as a result of insufficient contact with the pressure rollers 30.
  • the pressure rollers 30 are in a conventional manner provided with transducers 40, by means of which the momentary pressing force PK is measured. Based on schematic representation in Figure 2, the invention further clarified.
  • FIG. 2 shows that by the electric drive machine 24 drivable rotor 12 and the rotor 12 associated pressure rollers 30.
  • the stamp was for clarity waived.
  • the rotary tabletting machine 10 is a controller 42 associated with a plurality of Can take over control and regulation functions. Subsequently, only the essential for the invention Structure and function of the control unit 42 described.
  • the control unit 42 is connected via a signal line 44 with the Presskraftaufsacrificing 40 and receives a Istpresskraft PK IST proportional signal pk IS .
  • the control unit 42 is further connected to the electric drive machine 24 via a signal line 46, via which the electric drive machine 24 a control signal n R is replaced, which corresponds to the set speed of the rotor 12 to be set.
  • the control unit 42 comprises a computing unit 48 which receives the signal pk IS and a signal provided by a memory means 50 pk SET is supplied to the target pressing force PK SOLL to the pressure rollers 30 corresponds.
  • a step 52 the actual signals supplied by the Presskraftauf choir 40 pk IS and the target signal supplied from the storage means 50 pk SOLL processed. This is a difference between the signal pk SOLL and the signal pk IS determined.
  • This difference signal pk diff is in a further step 54 with a signal pk cross linked.
  • the signal pk cross is for example also provided by the memory means 50th In this case, for example, can be set variably, to which extent the signal pk border corresponding pressing force PK LIMIT can deviate from the target pressing force PK SOLL . For example, this difference between the pressing force limit value and the pressing force set value can amount to 10% of the pressing force setpoint.
  • step 54 If it is then determined in step 54 that the difference between the pressing force actual value and the pressing force setpoint value is greater than the difference between the pressing force set value and the pressing force limit value, that is, the pressing force actual value falls below the pressing force limit value a signal n rsoll generated corresponding to a target speed n R of the rotor 12.
  • This setpoint speed is less than the rated speed of the rotor 12 in normal operation.
  • the signal corresponding to the target speed becomes n rsoll with a the actual speed of the rotor 12 corresponding signal n rist linked.
  • the speed signal n R generated and provided to the prime mover 24. This then accelerates the rotor 12 to the predetermined speed n R.
  • the solution according to the invention is also suitable for detecting rotor 12 rotating at nominal rotational speed, as to whether the degree of filling of the dies 14 with the molding compound 26 decreases.
  • the pressing force PK decreases at the pressure rollers 30.
  • this decrease in the Istpresskraft leads to a reduction of the target speed n R of the rotor 12.
  • the target speed n R for example equal to a predeterminable minimum rotational speed n Rmin or in intermediate steps of the nominal speed n RNom to the minimum speed n Rmin be reduced.

Landscapes

  • 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)
  • Control Of Presses (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Claims (8)

  1. Procédé de commande d'une machine rotative à fabriquer des comprimés (10), un rotor (12) pouvant être mis en rotation par un moteur d'entraínement (24), le rotor (12) comprenant au moins une matrice (14) avec des pistons supérieurs (18) et des pistons inférieurs (16) associés, et une force de compression (PK) agissant sur de la matière à comprimer (26) versée dans la ou les matrices (14) étant détectée, caractérisé en ce que la force de compression (PKIST) détectée est comparée à une valeur limite (PKGRENZ) pouvant être prescrite et en ce que, en cas d'infériorité à la valeur limite (PKGRENZ), la vitesse de rotation de consigne (nR) du rotor (12) est réduite à une vitesse de rotation plus petite que la vitesse de rotation nominale (nRNENN).
  2. Procédé selon la revendication 1, caractérisé en ce que l'on mesure la force de compression (PK).
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce qu'il est possible de fixer un écart entre la valeur limite (PKGRENZ) et une force de compression de consigne (PKSOLL).
  4. Procédé selon la revendication 3, caractérisé en ce que l'écart fait entre 1 % et 50 %, notamment entre 5 % et 20 %, de préférence entre 8 % et 12 %.
  5. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'on compare la vitesse de rotation de consigne (nR) du rotor (12) à une vitesse de rotation réelle du rotor (12) ; et en ce que l'on règle le rotor (12) sur la vitesse de rotation de consigne (nR).
  6. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'on règle la vitesse de rotation du rotor (12) à partir de l'arrêt.
  7. Procédé selon l'une des revendications précédentes, caractérisé en ce que l'on règle la vitesse de rotation du rotor (12) à partir de sa vitesse de rotation nominale.
  8. Dispositif servant à commander une machine rotative à fabriquer des comprimés (10), conformément au procédé selon la revendication 1, et comportant : un appareil de commande (42) ou analogue servant à commander un moteur d'entraínement (24) d'un rotor (12) de la machine rotative à fabriquer des comprimés (10), un appareil (40) servant à détecter une force de compression (PK) agissant sur une matière à comprimer (26) ainsi que des moyens servant à comparer la force de compression (PKIST) détectée à une force de compression (PKGRENZ) pouvant être prescrite et au moins un moyen servant à prescrire une vitesse de rotation de consigne (nR) du rotor (12) en fonction de la comparaison entre la force de compression (PKIST) détectée et la force de compression (PKGRENZ) pouvant être prescrite.
EP03090036A 2003-02-10 2003-02-10 Méthode et dispositif pour le contrôle d'une presse pour comprimés à table rotative Expired - Fee Related EP1445093B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
DE50300536T DE50300536D1 (de) 2003-02-10 2003-02-10 Verfahren und Vorrichtung zur Steuerung einer Rundläufer-Tablettiermaschine
EP03090036A EP1445093B1 (fr) 2003-02-10 2003-02-10 Méthode et dispositif pour le contrôle d'une presse pour comprimés à table rotative
ES03090036T ES2242141T3 (es) 2003-02-10 2003-02-10 Metodo y dispositivo para el control de una maquina rotativa para la fabricacion de tabletas.
US10/774,641 US7136717B2 (en) 2003-02-10 2004-02-09 Method and device for the control of a rotary tablet forming machine
JP2004032413A JP3940401B2 (ja) 2003-02-10 2004-02-09 ロータリータブレット（錠剤）成形機を制御するための方法
JP2007030222A JP4549356B2 (ja) 2003-02-10 2007-02-09 ロータリータブレット成形機の制御装置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP03090036A EP1445093B1 (fr) 2003-02-10 2003-02-10 Méthode et dispositif pour le contrôle d'une presse pour comprimés à table rotative

Publications (2)

Publication Number Publication Date
EP1445093A1 EP1445093A1 (fr) 2004-08-11
EP1445093B1 true EP1445093B1 (fr) 2005-05-11

Family

ID=32605385

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03090036A Expired - Fee Related EP1445093B1 (fr) 2003-02-10 2003-02-10 Méthode et dispositif pour le contrôle d'une presse pour comprimés à table rotative

Country Status (5)

Country Link
US (1) US7136717B2 (fr)
EP (1) EP1445093B1 (fr)
JP (2) JP3940401B2 (fr)
DE (1) DE50300536D1 (fr)
ES (1) ES2242141T3 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006031797B3 (de) * 2006-07-06 2008-03-13 Korsch Ag Rundläufer-Tablettiermaschine
CN103085310A (zh) * 2011-11-07 2013-05-08 四川汇利实业有限公司 带有进料槽的高效压片机

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006023333B3 (de) * 2006-05-11 2007-11-22 Korsch Ag Tablettiermaschine
WO2009091935A1 (fr) * 2008-01-18 2009-07-23 Pivotal Systems Corporation Procédé et appareil pour tester in situ les régulateurs d'écoulement de gaz
FR2933897B1 (fr) * 2008-07-18 2011-05-20 Eurotab Dispositif pour former des tablettes par compaction a volume constant
JP6775311B2 (ja) 2016-03-29 2020-10-28 株式会社菊水製作所 成形品製造システム
EP3335868B1 (fr) * 2016-12-12 2021-06-09 Kikusui Seisakusho Ltd. Organe de commande et procédé de commande pour machine de moulage par compression rotative
DE102017130885B4 (de) * 2017-12-21 2020-01-23 Fette Compacting Gmbh Verfahren zum Regeln der Rotordrehzahl eines Rotors einer Rundläufertablettenpresse sowie Rundläufertablettenpresse

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US4100598A (en) * 1975-09-05 1978-07-11 Hoffmann-La Roche Inc. Tablet press related instrumentation for use in development and control of formulations of pharmaceutical granulations
DE2742572B1 (de) * 1977-09-22 1979-03-29 Fette Wilhelm Gmbh Verfahren zum Herstellen von Tabletten und Tablettenpresse
JPS5814080Y2 (ja) * 1978-10-04 1983-03-18 株式会社畑鉄工所 回転式粉末圧縮成型機の製品選別排出装置
GB2092508B (en) * 1981-02-05 1985-08-21 Frogerais Ed Sa Improvements in or relating to tablet making machines
US4570229A (en) * 1983-09-19 1986-02-11 Pennwalt Corporation Tablet press controller and method
DE3714031A1 (de) * 1987-04-27 1988-11-10 Fette Wilhelm Gmbh Rundlauf-tablettiermaschine
DE8815075U1 (fr) * 1988-12-03 1990-04-05 Manesty Machines Ltd., Liverpool, Lancashire, Gb
JPH0522398Y2 (fr) * 1989-04-28 1993-06-08
US5178948A (en) * 1989-08-07 1993-01-12 J. M. Huber Corporation Method and apparatus for production of rubber dispersible pellets
US5221250A (en) * 1991-01-07 1993-06-22 Beckman Instruments, Inc. Coding of maximum operating speed on centrifuge rotors and detection thereof
DE4315680C2 (de) 1993-05-05 1996-02-29 Korsch Maschfab Regelung von Tablettenparametern bei der Herstellung auf Rundlauf-Pressen
DE19502596C2 (de) * 1995-01-28 1997-08-28 Fette Wilhelm Gmbh Meßgerät und Rechner zur Überprüfung der auf einer Rundläuferpresse hergestellten Tabletten der laufenden Produktion
US5838571A (en) * 1996-01-29 1998-11-17 Alza Corporation Tablet press monitoring and controlling method and apparatus
DE19705092C1 (de) * 1997-01-31 1998-03-26 Korsch Pressen Gmbh Druckrolleneinheit für Rundlaufpressen
DE19708997C2 (de) * 1997-03-05 2002-08-29 Terra Ag Fuer Tiefbautechnik S Vorrichtung zur Steuerung des Vorschubantriebes einer zum Erzeugen von Erdbohrungen bestimmten Bohranlage
US6106262A (en) * 1997-12-25 2000-08-22 Metropolitan Computing Corporation Press simulation apparatus
DE19920379C2 (de) * 1999-05-04 2001-04-19 Fette Wilhelm Gmbh Rundlauf-Tablettiermaschine
DE19964225C2 (de) * 1999-12-17 2002-01-24 Henkel Kgaa Preßverfahren für mehrphasige Formkörper
WO2004009319A1 (fr) * 2002-07-19 2004-01-29 Smi Incorporated Procede et appareil de production de comprimes miniatures
US20050200038A1 (en) * 2004-03-12 2005-09-15 Courtoy Nv Method for controlling a rotary tablet press and such a press

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102006031797B3 (de) * 2006-07-06 2008-03-13 Korsch Ag Rundläufer-Tablettiermaschine
CN103085310A (zh) * 2011-11-07 2013-05-08 四川汇利实业有限公司 带有进料槽的高效压片机

Also Published As

Publication number Publication date
JP2007181881A (ja) 2007-07-19
JP3940401B2 (ja) 2007-07-04
EP1445093A1 (fr) 2004-08-11
DE50300536D1 (de) 2005-06-16
US7136717B2 (en) 2006-11-14
JP4549356B2 (ja) 2010-09-22
US20040156940A1 (en) 2004-08-12
JP2004243413A (ja) 2004-09-02
ES2242141T3 (es) 2005-11-01

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