EP0431269B1 - Procédé et dispositif de surveillance des forces de compression d'une machine de production des comprimés - Google Patents
Procédé et dispositif de surveillance des forces de compression d'une machine de production des comprimés Download PDFInfo
- Publication number
- EP0431269B1 EP0431269B1 EP90117988A EP90117988A EP0431269B1 EP 0431269 B1 EP0431269 B1 EP 0431269B1 EP 90117988 A EP90117988 A EP 90117988A EP 90117988 A EP90117988 A EP 90117988A EP 0431269 B1 EP0431269 B1 EP 0431269B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- computer
- pulse generator
- pelleting machine
- pressing forces
- angular
- 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 - Lifetime
Links
Images
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
- B30B15/32—Discharging presses
-
- 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
-
- 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
Definitions
- the invention relates to a method and a device for monitoring the maximum pressing forces of a tableting machine with a rotating die plate and punches, the maximum pressing forces of which are given for further evaluation in a computer via which an ejection device for bad tablets can be controlled.
- the pressing forces used for this are continuously measured during production and compared with target values. If a measured maximum pressing force value lies outside the setpoint limits, the corresponding tablet must be sorted out. This is done by actuating an ejection device which is arranged behind a pressing station, specifically behind the main printing station, to which a pre-printing station is assigned. The prerequisite for this is that the maximum press force values of at least the pressure rollers of the main printing station are continuously measured and evaluated. In view of the high rotational speed of the die plate, the measurement results are evaluated on a computer, into which the measured press force values are entered.
- Monitoring the pressing forces in the manufacture of tablets is not only necessary to identify defects and to sort out bad tablets in good time, but is also monitored in order to be able to continuously provide evidence of the quality of the tablets produced and thus provide proof at a later point in time can that the tablets produced correspond to the required quality by producing them under a predetermined compression force.
- a continuous control and display of the measurement results and the size of any errors that occur can thus be made possible via the computer.
- a stamp proximity switch on the die plate as a measuring sensor, with which the time at which the maximum of the Press force is present. It is a proximity switch that triggers a switching pulse, for example, when a metal part traverses an electrical field in front of it. Accordingly, 30 pulses per revolution are triggered on a die plate with, for example, 30 die holes and put into the computer.
- this stamp proximity switch is followed by a second stamp proximity switch as a measuring sensor, the pulse length of which depends on the circumferential speed or the speed of the die plate, so that the computer can determine the position of a stamp exactly as the die plate rotates at any time.
- stamp proximity switches has been shown to be incomplete when a die plate with a given stamp division, such as 30 stamps, for example, is to be exchanged for another with a different stamp division, such as 24 die holes or another die plate with the same, on a tabletting machine Stamp division, however, of a different nature of the die holes for the purpose of producing larger or smaller tablets.
- the object of the invention is to provide a method and a device for monitoring the maximum pressing forces, which allow a die plate to be replaced by another, without the need to change the electronic device with the position of the individual punches or die plate itself is to be determined in order to assign these values to the measured maximum pressing force values for the purpose of further evaluation.
- the position of the die plate is continuously determined with an angular pulse generator by emitting pulses, which is connected to a computer with which the pulses are assigned to the entered maximum pressing force values for further evaluation.
- An angle pulse generator is a commercially available sensor, which is either an inductive pulse generator on Ma gnetbased can be formed or works on an optical basis using light-emitting diodes and photoelectric cells, the formation can be such that with an angular pulse generator, several independent pulses can be delivered simultaneously, which can be, for example, three individual pulse generators are combined in a housing or a transmitter.
- the main advantage of the angular pulse generator can be seen in the fact that it continuously measures the position of a die plate and thus its associated punch during circulation, regardless of the punch pitch or number of die holes in the respective die plate. In any case, this is the case if the signal transmitter for the angular pulse generator is connected to the drive of the die plate, so that it does not need to be exchanged for another one when the die plate is changed.
- the invention provides that a coded disk is provided as the signal transmitter, which is preferably arranged on the drive shaft of the die disk, the coding being able to consist, for example, of a line marking.
- a die plate for example, 3,600 pulses can be triggered, so that with a punch division of 30 or 30 die holes arranged over the circumference of the die plate, 120 pulses are triggered for the passage of each die, which are taken into account by evaluating the speed of the die plate allow the computer to be continuously assigned to the independently measured maximum press force values.
- the rotational speed to be taken into account for this can be continuously determined with the same angle pulse generator if the disk or the signal transmitter is provided with a marking, by means of which a separate pulse is caused with each revolution of the die disk.
- the angular pulse generator Since the maximum pressing forces to be evaluated are caused by the pressure rollers of the stationary main press station, it is expedient to choose the location of the main pressure rollers as a reference point or as a "zero degree position" and then to align the angular pulse generator with the associated signal disk. If the one die plate is replaced by another, the angular pulse generator does not need to be adjusted, since its measurement results depend solely on the position of the stationary main pressure station or are independent of the nature of a die plate.
- the die plate 2 is part of a high-performance tabletting machine which is designed as a so-called double rotary machine and has two main printing stations 8 and 8 ', which are preceded by pre-printing stations 7 and 7'. With respect to the direction of rotation of the die plate counterclockwise according to arrow 6, there are sorting switches 10 and 10 'behind the two main pressure stations, which are to be moved in accordance with the double arrow 11 if a bad tablet is to be eliminated.
- the pre-printing stations 7, 7' as well as main printing stations 8 and 8 'and sorting switches 10 and 10' are arranged in a stationary manner, while the die plate 2 with the die holes 5 and the punches 4 rotate during operation.
- a single tablet For the production of a single tablet, its powder is first pressed in a matrix bore 5 by pressure rollers 12 or 12 'in a pre-pressure station 7 or 7' and then pressed under maximum pressure with pressure rollers 13 in a main pressure station 8 or 8 '.
- the pressing forces used for this are continuously measured using strain gauges at a measuring point 28 (FIG. 7).
- the measuring point 28 is followed by an amplifier 30 which transmits the signals via an analog-digital converter 32 to a computer 34 which is designed as a pressing force monitoring device and for this purpose compares the received pressing force signals with setpoint limits by electronic processing.
- a control device 38 for a sorting gate 10 can be controlled in order to remove a bad tablet if it is present.
- an angle pulse generator 20 is provided for their location determination seen that interacts with a coded disc, which is provided as a signal transmitter, for example, with a line marking, by which, for example, 3,600 pulses are triggered when the die disc rotates, so that 150 stamps are associated with each stamp when it passes through a main press station.
- the signal disk 18 is arranged on the drive shaft 16 of the die plate 2, so that it rotates once with each revolution of a die plate, but is completely independent of the particular nature of the die plate, that is to say is effective regardless of which stamp division is provided for the die plate.
- the signal disk is provided with a marking which triggers only one pulse during each revolution, which can be referred to as a circumferential pulse or circulation pulse 22, it is expedient to trigger this pulse when the marking passes through the zero starting position, that is to say to that Time at which a maximum pressing force is exerted on the main station 8 by a punch.
- a marking which triggers only one pulse during each revolution
- FIG. 4 A corresponding representation can be found in FIG. 4, in which the pressure force curve for the plungers S1, S2 and S3 is shown in the upper diagram and below the representation is shown for the circumferential pulse 22, the switching edge 23 of which is below the pressure force maximum of the plunger S1 corresponding to line 40 lies.
- curve (1) shows the pressure force curve at the pre-printing station 7 and curve (2) the pressure force curve at the main printing station 8, in each case over time (t), so that it can be seen that the maximum pressing force of the Stamp S1 was measured at a later point in time at the main printing station 8 than at the pre-printing station 7.
- the maximum of the pressing force of the stamp S1 lies according to curve 2 on the zero line 40, on which the switching flank 23 of the circulation pulse 22 is also set by setting the signal disk accordingly 18 lies.
- the pulse chains which are denoted by ⁇ p 1 and ⁇ p 2 and can be assigned to the main printing station 8 and the pre-printing station 7.
- pulse chains or the curves (4, 5) are those pulses which are input by the pulse generator 20 directly into a first computer 26 (FIG. 7) in accordance with the illustration according to FIG. 6.
- the computer 26 converts the signals Output signals corresponding to curves 6 and 7 for the form and main printing station, at which the pulses are at a distance from one another which corresponds to the stamp pitch ⁇ p S1, which is entered for curves 2, 3, 4 and 5.
- the pulses corresponding to curves 6 and 7 are entered in parallel to the measured pressing forces in the second computer 34 via the analog-digital converter 32, so that a calculation of the form and the main pressure of individual stamps is made possible by a calculation, with double-rounder machines also taking into account the second press station and, in addition, control of the sorting gate 10 and output of the results in the manner of documents or via a display 36 is possible.
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)
- Presses And Accessory Devices Thereof (AREA)
Claims (12)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3939956A DE3939956A1 (de) | 1989-12-02 | 1989-12-02 | Verfahren und einrichtung zum ueberwachen der presskraefte einer tablettiermaschine |
DE3939956 | 1989-12-02 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0431269A1 EP0431269A1 (fr) | 1991-06-12 |
EP0431269B1 true EP0431269B1 (fr) | 1993-08-11 |
EP0431269B2 EP0431269B2 (fr) | 1998-11-04 |
Family
ID=6394714
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90117988A Expired - Lifetime EP0431269B2 (fr) | 1989-12-02 | 1990-09-19 | Procédé et dispositif de surveillance des forces de compression d'une machine de production des comprimés |
Country Status (3)
Country | Link |
---|---|
US (1) | US5145693A (fr) |
EP (1) | EP0431269B2 (fr) |
DE (2) | DE3939956A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19844390A1 (de) * | 1998-09-28 | 2000-04-06 | Fette Wilhelm Gmbh | Verfahren zur Produktionsüberwachung bei der Herstellung von Tabletten in einer Rundläufertablettiermaschine |
DE102007052552A1 (de) | 2007-10-29 | 2009-04-30 | Luxner, Peter, Dipl.-Ing. | Verfahren und Vorrichtung zur Ermittlung von Steuer- und Regelparametern für Tablettenpressen |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5330340A (en) * | 1992-03-25 | 1994-07-19 | The Black Clawson Company | Pelletizer with automatic knife adjustment |
JPH0780076B2 (ja) * | 1992-04-28 | 1995-08-30 | 株式会社菊水製作所 | 回転式錠剤機の取着ロードセル点検方法 |
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 (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 |
DE19911294C1 (de) * | 1999-03-13 | 2000-06-15 | Fette Wilhelm Gmbh | Einstellverfahren für eine Rundläufertablettenpresse mit einem Winkelimpulsgeber zur Ermittlung des Preßkraftverlaufs an den einzelnen Stempeln in mindestens einer Preßstation |
USH2090H1 (en) * | 1999-12-13 | 2003-11-04 | Sherwood Services, A.G. | One-piece unitary occluder |
DE10113414C2 (de) * | 2001-03-20 | 2003-04-24 | Fette Wilhelm Gmbh | Vorrichtung zum Aussortieren von Tabletten in einer Rundläufer-Tablettenpresse |
US6854028B2 (en) * | 2001-03-29 | 2005-02-08 | International Business Machines Corporation | Disk drive control for improving the operation of a computer subjected to motion |
EP1340612A1 (fr) * | 2002-02-14 | 2003-09-03 | Cofmo Preeses | Presse avec un codeur boíte à cames programmable |
DE102004008321B3 (de) | 2004-02-20 | 2005-11-17 | Fette Gmbh | Verfahren und Vorrichtung zur Qualitätsüberwachung bei der Herstellung von Tabletten |
DE102004008322B4 (de) * | 2004-02-20 | 2008-11-27 | Fette Gmbh | Pulverpresse |
DE102005005012B4 (de) * | 2005-02-03 | 2007-07-05 | Fette Gmbh | Verfahren und Vorrichtung zur Sortierung von Tabletten an einer Rundläufer-Tablettenpresse |
DE102005007790B4 (de) * | 2005-02-19 | 2007-06-28 | Fette Gmbh | Verfahren und Vorrichtung zur Versuchspressung von Mehrschichttabletten oder Manteltabletten |
EP1810819B1 (fr) * | 2006-01-18 | 2012-06-13 | Fette GmbH | Presse rotative et procédé destinés à la surveillance de la production de tablettes dans une presse rotative |
DE102006002359B4 (de) | 2006-01-18 | 2009-01-02 | Fette Gmbh | Vorrichtung und Verfahren zur Überwachung der Produktion von Tabletten in einer Rundläuferpresse |
WO2008016183A1 (fr) * | 2006-08-04 | 2008-02-07 | Brother Kogyo Kabushiki Kaisha | Appareil de formation d'image |
FR3094656B1 (fr) | 2019-04-03 | 2022-01-07 | Safran Aircraft Engines | Outil de brochage, machine de brochage comportant un tel outil et procédé d’usinage d’une pièce au moyen d’une telle machine |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1958393A1 (de) * | 1969-11-21 | 1971-06-09 | Heidenhain Gmbh Dr Johannes | Vorrichtung zur Winkeleinstellung |
DE2520662C3 (de) * | 1975-05-09 | 1983-11-03 | Wilhelm Fette Gmbh, 2053 Schwarzenbek | Einrichtung zum Überwachen der Preßkräfte der Stempel einer Tablettenpresse |
GB1551954A (en) * | 1975-05-28 | 1979-09-05 | Hoffmann La Roche | Standardization of a physiochemical parameter of a batch of formulation in tabletted form |
AT337532B (de) * | 1975-06-25 | 1977-07-11 | Leinweber Anstalt Ing Joh | Vorrichtung zur optoelektronischen ubertragung von stellsignalen von einem feststehenden teil einer arbeitsmaschine an vorrichtungen bei taktweise weiterdrehenden rundtischen |
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 |
US4030868A (en) * | 1976-03-15 | 1977-06-21 | Hoffmann-La Roche Inc. | Force measurement and analysis particularly relating to rotary tablet presses |
DE2824547A1 (de) * | 1978-06-05 | 1979-12-13 | Fette Wilhelm Gmbh | Verfahren und einrichtung zum aussortieren von tabletten nach ihrer herstellung in einer tablettiermaschine |
US4253811A (en) * | 1979-07-13 | 1981-03-03 | Firma Wilhelm Fette Gmbh | Method of and a device for sorting pellets upon their molding in a preforming press |
JPS5829600A (ja) * | 1981-08-12 | 1983-02-21 | 株式会社 アマダ | マイクロコンピユ−タによるプレスの制御装置 |
DE3241063A1 (de) * | 1982-11-06 | 1984-05-10 | Siegfried Ing.(grad.) 7321 Börtlingen Schwarz | Verfahren und einrichtung zur ueberwachung der kraefte an stanzpressen o. dgl. |
US4570229A (en) * | 1983-09-19 | 1986-02-11 | Pennwalt Corporation | Tablet press controller and method |
US4606205A (en) * | 1984-11-09 | 1986-08-19 | Continental Can Company, Inc. | Applied force monitor for apparatus for forming products from sheet material |
US4817006A (en) * | 1986-03-28 | 1989-03-28 | Thomas Engineering, Inc. | Pharmaceutical tablet press control mechanism |
JPS6310036A (ja) * | 1986-06-30 | 1988-01-16 | Asahi Okuma Ind Co Ltd | パ−ツホ−マ− |
DE3735677A1 (de) * | 1987-10-22 | 1989-05-03 | Hohner Elektrotechnik Kg | Drehsignalgeber |
DE8801566U1 (de) * | 1987-10-22 | 1988-06-01 | ELBEK-Elektroautomation GmbH, 5900 Siegen | Gerät zur Sicherung von Werkzeugen an Stanzen und Pressen |
IT1221567B (it) * | 1987-12-30 | 1990-07-12 | Ima Spa | Macchina comprimitrice per la realizzazione di compresse |
-
1989
- 1989-12-02 DE DE3939956A patent/DE3939956A1/de not_active Withdrawn
-
1990
- 1990-09-19 EP EP90117988A patent/EP0431269B2/fr not_active Expired - Lifetime
- 1990-09-19 DE DE9090117988T patent/DE59002304D1/de not_active Expired - Fee Related
- 1990-11-08 US US07/611,176 patent/US5145693A/en not_active Expired - Lifetime
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19844390A1 (de) * | 1998-09-28 | 2000-04-06 | Fette Wilhelm Gmbh | Verfahren zur Produktionsüberwachung bei der Herstellung von Tabletten in einer Rundläufertablettiermaschine |
DE19844390B4 (de) * | 1998-09-28 | 2005-09-22 | Wilhelm Fette Gmbh | Verfahren zur Herstellung von Tabletten in einer Rundläufertablettiermaschine |
DE102007052552A1 (de) | 2007-10-29 | 2009-04-30 | Luxner, Peter, Dipl.-Ing. | Verfahren und Vorrichtung zur Ermittlung von Steuer- und Regelparametern für Tablettenpressen |
DE102007052552B4 (de) * | 2007-10-29 | 2010-01-07 | Luxner, Peter, Dipl.-Ing. | Verfahren und Vorrichtung zur Ermittlung von Steuer- und Regelparametern für Tablettenpressen |
Also Published As
Publication number | Publication date |
---|---|
DE59002304D1 (de) | 1993-09-16 |
US5145693A (en) | 1992-09-08 |
DE3939956A1 (de) | 1991-06-06 |
EP0431269A1 (fr) | 1991-06-12 |
EP0431269B2 (fr) | 1998-11-04 |
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