EP0350563A3 - Method and apparatus for monitoring the press loads of the punches in a tablet press - Google Patents

Method and apparatus for monitoring the press loads of the punches in a tablet press Download PDF

Info

Publication number
EP0350563A3
EP0350563A3 EP19890103234 EP89103234A EP0350563A3 EP 0350563 A3 EP0350563 A3 EP 0350563A3 EP 19890103234 EP19890103234 EP 19890103234 EP 89103234 A EP89103234 A EP 89103234A EP 0350563 A3 EP0350563 A3 EP 0350563A3
Authority
EP
European Patent Office
Prior art keywords
stamp
compared
limits
mean
tablet press
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.)
Granted
Application number
EP19890103234
Other languages
German (de)
French (fr)
Other versions
EP0350563A2 (en
EP0350563B1 (en
Inventor
Jürgen Ing. Grad. Hinzpeter
Hans-Dieter Grüdelbach
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
Wilhelm Fette GmbH
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 Wilhelm Fette GmbH filed Critical Wilhelm Fette GmbH
Publication of EP0350563A2 publication Critical patent/EP0350563A2/en
Publication of EP0350563A3 publication Critical patent/EP0350563A3/en
Application granted granted Critical
Publication of EP0350563B1 publication Critical patent/EP0350563B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Medical Preparation Storing Or Oral Administration Devices (AREA)
  • Control Of Presses (AREA)
  • Presses And Accessory Devices Thereof (AREA)
  • Medicinal Preparation (AREA)

Abstract

Zum Überwachen der Preßkräfte der paarweise wirksamen Ober- und Unterstempel einer Tablettenpresse, mit der ein aus aufeinanderfolgenden Meßergebnissen gebildeter Mittelwert mit zwei einstellbaren Toleranzgrenzen (G) verglichen wird, sind bei bekannten Verfahren dem Mittelwert (A) zwei einstellbare Einzelwertgrenzen (B, C) zugeordnet, mit denen die Maxima der Einzelwerte der Preßkräfte verglichen werden. Mit einer derartigen Einrichtung und diesem Verfahren lassen sich jedoch nicht einwandfrei rechtzeitig gewisse Ursachen von Betriebsstörungen erkennen, da beispielsweise eine leichte Beschädigung eines einzelnen Stempels den Mittelwert nicht wesentlich ändert. Hinzu kommt, daß der Toleranzbereich verhältnismäßig weit gewählt werden muß, um ein häufiges Stillsetzen der Tablettenpresse zu verhindern, ohne daß besondere Betriebsstörungen vorliegen. Um dem abzuhelfen ist nach der Erfindung vorgesehen, den einzelnen Stempelpaaren (1, 2) sogenannte Stempelpaarmittelwertgrenzen (Su, So) zuzuordnen, mit denen der jeweilige Stempelpaarmittelwert (S) verglichen wird und zwar vorzugsweise über einen angeschlossenen Rechner. To monitor the pressing forces of the paired upper and lower punches of a tablet press, with which a mean value formed from successive measurement results is compared with two adjustable tolerance limits (G), two adjustable single value limits (B, C) are assigned to the mean value (A) in known methods with which the maxima of the individual values of the pressing forces are compared. With such a device and this method, however, certain causes of malfunctions cannot be recognized in good time, since, for example, slight damage to a single stamp does not significantly change the mean value. In addition, the tolerance range must be chosen to be relatively wide in order to prevent frequent shutdown of the tablet press without any particular malfunctions. In order to remedy this, the invention provides for the individual stamp pairs (1, 2) to be assigned so-called stamp pair mean limits (S u , S o ) with which the respective stamp pair mean (S) is compared, preferably via a connected computer.

EP89103234A 1988-07-11 1989-02-24 Method and apparatus for monitoring the press loads of the punches in a tablet press Expired - Lifetime EP0350563B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3823417 1988-07-11
DE3823417A DE3823417A1 (en) 1988-07-11 1988-07-11 METHOD AND DEVICE FOR MONITORING THE PRESSING FORCE OF THE STAMP OF A TABLET PRESS

Publications (3)

Publication Number Publication Date
EP0350563A2 EP0350563A2 (en) 1990-01-17
EP0350563A3 true EP0350563A3 (en) 1991-06-19
EP0350563B1 EP0350563B1 (en) 1993-08-04

Family

ID=6358405

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89103234A Expired - Lifetime EP0350563B1 (en) 1988-07-11 1989-02-24 Method and apparatus for monitoring the press loads of the punches in a tablet press

Country Status (3)

Country Link
US (1) US5004576A (en)
EP (1) EP0350563B1 (en)
DE (2) DE3823417A1 (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2638118A1 (en) * 1988-10-20 1990-04-27 Adl Automation METHOD AND APPARATUS FOR COMPRESSION AND CONTROL OF COMPRESSION OF PULVERULENT AND PRESSED MATERIALS BY APPLYING
JPH0780076B2 (en) * 1992-04-28 1995-08-30 株式会社菊水製作所 Attachment load cell inspection method of rotary tablet machine
US5322655A (en) * 1993-02-19 1994-06-21 Thomas Engineering, Inc. Method for monitoring and controlling the weights of each layer of a multilayer tablet
DE19502596C2 (en) * 1995-01-28 1997-08-28 Fette Wilhelm Gmbh Measuring device and computer for checking the tablets of the current production made on a rotary press
US5838571A (en) * 1996-01-29 1998-11-17 Alza Corporation Tablet press monitoring and controlling method and apparatus
DE19717217C2 (en) * 1997-04-24 1999-12-02 Fette Wilhelm Gmbh Method and device for producing compacts from hard metal, ceramic, sintered metal or the like
DE19844390B4 (en) * 1998-09-28 2005-09-22 Wilhelm Fette Gmbh Process for producing tablets in a rotary tablet machine
DE10135283C2 (en) * 2001-07-19 2003-09-18 Fette Wilhelm Gmbh Process for pressing powder material
ATE328660T1 (en) * 2003-02-12 2006-06-15 Thilo Kraemer DEVICE FOR THE QUALITY CONTROL OF SOLID PHARMACEUTICAL PRODUCTS

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1152061A (en) * 1966-06-14 1969-05-14 Upjohn Co Pelleting Apparatus
GB1179350A (en) * 1967-09-15 1970-01-28 Ici Ltd Particle Shaping Method
US4099239A (en) * 1976-03-15 1978-07-04 Hoffmann-La Roche Inc. Force measurement and analysis particularly relating to rotary tablet presses
DE2520662C3 (en) * 1975-05-09 1983-11-03 Wilhelm Fette Gmbh, 2053 Schwarzenbek Device for monitoring the pressing forces of the punches of a tablet press
US4570229A (en) * 1983-09-19 1986-02-11 Pennwalt Corporation Tablet press controller and method
WO1986005743A1 (en) * 1985-03-29 1986-10-09 Thomas Engineering, Inc. Pharmaceutical tablet press control mechanism

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3255716A (en) * 1962-12-10 1966-06-14 Upjohn Co Measurement of forces within a tableting machine
CH475759A (en) * 1967-07-21 1969-07-31 Ciba Geigy Device for tablet weight monitoring on a tablet machine
GB1551954A (en) * 1975-05-28 1979-09-05 Hoffmann La Roche Standardization of a physiochemical parameter of a batch of formulation in tabletted form
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
DE2742571B1 (en) * 1977-09-22 1979-03-29 Fette Wilhelm Gmbh Process for the creation of documents about the production of tablets and tablet presses
DE2742572B1 (en) * 1977-09-22 1979-03-29 Fette Wilhelm Gmbh Method of making tablets and tablet press
DE3520203A1 (en) * 1985-06-05 1986-12-11 Wilhelm Fette Gmbh, 2053 Schwarzenbek ROTARY ROTARY TABLETING MACHINE AND METHOD FOR CONTROLLING YOUR PRINT ROLLERS

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1152061A (en) * 1966-06-14 1969-05-14 Upjohn Co Pelleting Apparatus
GB1179350A (en) * 1967-09-15 1970-01-28 Ici Ltd Particle Shaping Method
DE2520662C3 (en) * 1975-05-09 1983-11-03 Wilhelm Fette Gmbh, 2053 Schwarzenbek Device for monitoring the pressing forces of the punches of a tablet press
US4099239A (en) * 1976-03-15 1978-07-04 Hoffmann-La Roche Inc. Force measurement and analysis particularly relating to rotary tablet presses
US4570229A (en) * 1983-09-19 1986-02-11 Pennwalt Corporation Tablet press controller and method
WO1986005743A1 (en) * 1985-03-29 1986-10-09 Thomas Engineering, Inc. Pharmaceutical tablet press control mechanism

Also Published As

Publication number Publication date
DE3823417A1 (en) 1990-01-18
EP0350563A2 (en) 1990-01-17
US5004576A (en) 1991-04-02
EP0350563B1 (en) 1993-08-04
DE58905120D1 (en) 1993-09-09

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