EP0637507B1 - Method and apparatus for the cleaning of tablet, pill or granule making machines, in particular of rotary tabletting machines - Google Patents

Method and apparatus for the cleaning of tablet, pill or granule making machines, in particular of rotary tabletting machines Download PDF

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Publication number
EP0637507B1
EP0637507B1 EP94250195A EP94250195A EP0637507B1 EP 0637507 B1 EP0637507 B1 EP 0637507B1 EP 94250195 A EP94250195 A EP 94250195A EP 94250195 A EP94250195 A EP 94250195A EP 0637507 B1 EP0637507 B1 EP 0637507B1
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EP
European Patent Office
Prior art keywords
treatment chamber
cleaning
rotor
spraying
pressure
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
Application number
EP94250195A
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German (de)
French (fr)
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EP0637507A1 (en
Inventor
Wolfgang Korsch
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Korsch AG
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Korsch Pressen GmbH
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Publication of EP0637507A1 publication Critical patent/EP0637507A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/02—Cleaning by the force of jets or sprays
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
    • B08B3/04—Cleaning involving contact with liquid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B9/00—Cleaning hollow articles by methods or apparatus specially adapted thereto 
    • B08B9/08—Cleaning containers, e.g. tanks
    • 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
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/0082—Dust eliminating means; Mould or press ram cleaning means

Definitions

  • the invention relates to a method and a device for cleaning tableting, coating and granulating machines, in particular rotary tablet presses, with a treatment chamber that includes at least the rotor.
  • the invention is therefore based on the object of providing a method and a device for cleaning tableting, coating and granulating machines, in particular a rotary tablet press, with complete removal of the liquid residues from and from the treatment chamber with little use of cleaning liquids in this component, in particular a rotary tablet press, is ensured.
  • the method according to the invention provides that a cleaning agent and a rinsing agent are sprayed and sucked off again one after the other within the treatment chamber, then all openings of the treatment chamber are closed and a vacuum, in particular from about 0.1 to 0.2 bar , is generated within the encapsulated treatment chamber.
  • the device according to the invention provides that spray heads for spraying the cleaning and rinsing agent are provided within the treatment chamber and connections are provided for suctioning off the cleaning and rinsing agent and that devices for closing all openings of the treatment chamber and a vacuum device which can be connected to them are provided in order to prevent the Negative pressure of about 0.1 to 0.2 bar from the absolute pressure within the encapsulated treatment chamber.
  • the method and the device according to the invention enable cleaning, in particular the components of the rotor of a rotary tablet press located in the treatment chamber, with little use of detergents and dishwashing agents and complete removal of the detergents and dishwashing agents used by applying the negative pressure of approximately 0.1 to 0.2 bar of the absolute pressure within the encapsulated treatment chamber.
  • the generation of the vacuum within the treatment chamber enables the components of the rotary tablet press located within the treatment chamber to dry, even in inaccessible openings and parting lines of the rotor. Remaining liquid residues are sucked off by means of the vacuum and drawn off via the vacuum connection.
  • the method according to the invention is then followed explained in more detail with reference to the device according to the invention shown in the drawing.
  • the single figure shows a side view of a rotary tablet press with a rotor located within the treatment chamber, certain components having been removed beforehand.
  • the rotary tablet press comprises a machine base 1 standing on feet 2 for receiving the bearing and the drive elements of the rotor 3, which is arranged within a treatment chamber 4 arranged above the machine base 1 and is provided with a further bearing in the head piece 5.
  • the treatment chamber 4 is enclosed by four window panes 6, which enclose the rotor 3 and are fixed to four supports 7 which mount the head piece 5 on the machine base 1.
  • the machine base 1 comprises a cover plate 8, not shown in detail, the surface of which each has a gradient of 3 to 4 ° to outlets, to which suction hoses 9 are connected, which are guided to a common drain connector 10.
  • a plurality of high-pressure spray nozzles 11 are arranged inside the treatment chamber 4 and are directed against the rotor 3 and into the interior of the treatment chamber 4 at different angles of inclination from above and below.
  • an inflow nozzle 12 for cleaning and rinsing agents and an inflow nozzle 13 for superheated steam are attached, which lead via channels (not shown) in the head piece 5 into the treatment chamber 4, in which the rotor 3 is mounted.
  • a connecting piece 14 is attached to the machine base 1, which is connected to the vacuum hose 15 with the Treatment chamber 4 is connected and to which a vacuum device, not shown, for applying a vacuum of 0.1 to 0.2 bar within the treatment chamber 4 can be connected.
  • the treatment chamber 4 and the rotor 3 rotating slowly therein are rinsed, a rinsing agent, in particular distilled water, being fed in via the inlet connection 12 and sprayed against the rotor 3 via the high-pressure spray nozzles 11.
  • a rinsing agent in particular distilled water
  • the detergent is then also sucked off again via the suction nozzle 10 and can be cleaned via filters and used again.
  • all openings of the treatment chamber 4 are hermetically sealed, in particular the suction nozzle 10, the inlet nozzle 12 for cleaning and washing-up liquid and also the inlet nozzle 13 for superheated steam and the outlet nozzle 10.
  • the window panes 6, the cover plate 8 of the machine base 1 and the base plate of the head piece 5 enclose the hermetically sealed treatment chamber 4.
  • a negative pressure of about 0.1 to 0.2 bar is then generated based on the absolute pressure within the then hermetically sealed treatment chamber 4, so that the entire still within the Treatment chamber 4 residual moisture adhering to the window panes 6 and in particular the residual moisture remaining within the bores and connecting gaps of the rotor 3 are completely removed.
  • the residual water evaporates at room temperature and is drawn off via the connecting piece 24 for the vacuum device.
  • the first and the second cleaning step are preferably carried out at temperatures above room temperature, in particular at temperatures between 40 and 70 ° C. This prevents condensation from forming when the treatment chamber 4 is opened.
  • the process enables compliance with the clean room conditions for the production of food and beverages according to GMP and FDA regulations.
  • the high-pressure spray nozzles 11 can also be designed as E-shaped spray heads, a high-pressure spray nozzle being arranged at the ends of the horizontal webs of the E-shaped spray heads, which, for example, enclose the die table 18 on both sides and spray directly into the holes in the die.

Description

Die Erfindung bezieht sich auf ein Verfahren und eine Vorrichtung zum Reinigen von Tablettier-, Dragier- und Granuliermaschinen, insbesondere von Rundlauf-Tablettenpressen mit einer mindestens den Rotor einschliessenden Behandlungskammer.The invention relates to a method and a device for cleaning tableting, coating and granulating machines, in particular rotary tablet presses, with a treatment chamber that includes at least the rotor.

Aus "Pharmaceutical Cosmetic Equipment", Heft Jan./Feb. 1988 ist eine Rundlauf-Tablettenpresse vorbekannt, die mit einer mindestens den Rotor einschliessenden Behandlungskammer versehen ist, die mit einer Reinigungsflüssigkeit geflutet wird und bei der mittels Ultraschall die Schmutzpartikel des Rotors abgestoßen werden. Die mit den Schmutzpartikeln behaftete Flüssigkeit wird nach einer vorgegebenen Behandlungszeit wieder abgesaugt. Nachteilig hierbei ist, daß die leichten Schmutzpartikel auf der Oberfläche der Flüssigkeit schwimmen und beim Absaugen der Flüssigkeit auf den Oberflächen des Rotors und der Behandlungskammer einen Schmutzfilm hinterlassen, der auch nach mehrfachem Fluten der Behandlungskammer nicht vollständig beseitigt werden kann. Nachteilig ist ferner das nachträglich erfolgende Trocknen der innerhalb der Behandlungskammer befindlichen Rotor-Bauteile, insbesondere werden Flüssigkeitsreste aus Bohrungen und Trennfugen des Rotors nicht vollständig entfernt.From "Pharmaceutical Cosmetic Equipment", Issue Jan./Feb. In 1988 a rotary tablet press was previously known, which was provided with a treatment chamber enclosing at least the rotor, which was flooded with a cleaning liquid and in which the dirt particles of the rotor were repelled by means of ultrasound. The liquid with the dirt particles is sucked off again after a predetermined treatment time. The disadvantage here is that the light dirt particles float on the surface of the liquid and leave a dirt film on the surfaces of the rotor and the treatment chamber when the liquid is sucked off repeated flooding of the treatment chamber cannot be completely eliminated. Another disadvantage is the subsequent drying of the rotor components located in the treatment chamber, in particular liquid residues are not completely removed from bores and joints of the rotor.

Der Erfindung liegt von daher die Aufgabe zugrunde, ein Verfahren und eine Vorrichtung zum Reinigen von Tablettier-, Dragier- und Granuliermaschinen, insbesondere einer Rundlauf-Tablettenpresse zu schaffen, wobei unter geringem Einsatz von Reinigungsflüssigkeiten eine vollständige Entfernung der Flüssigkeitsreste aus der Behandlungskammer und von den in diesem Bauteilen, insbesondere einer Rundlauf-Tablettenpresse, sichergestellt ist.The invention is therefore based on the object of providing a method and a device for cleaning tableting, coating and granulating machines, in particular a rotary tablet press, with complete removal of the liquid residues from and from the treatment chamber with little use of cleaning liquids in this component, in particular a rotary tablet press, is ensured.

Zur Lösung dieser Aufgabe sieht das erfindungsgemäße Verfahren vor, daß innerhalb der Behandlungskammer nacheinander ein Reinigungs- und ein Spülmittel versprüht und wieder abgesaugt werden, daß danach alle Öffnungen der Behandlungskammer verschlossen werden und ein Unterdruck, insbesondere von etwa 0,1 bis 0,2 bar, innerhalb der dann gekapselten Behandlungskammer erzeugt wird. Die erfindungsgemäße Vorrichtung sieht vor, daß Sprühköpfe zum Versprühen des Reinigungs- und Spülmittels innerhalb der Behandlungskammer vorgesehen und Anschlüsse zum Absaugen des Reinigungs- und Spülmittels vorgesehen sind und daß Einrichtungen zum Verschließen aller Öffnungen der Behandlungskammer und eine an diese anschließbare Unterdruckeinrichtung vorgesehen sind, um den Unterdruck von etwa 0,1 bis 0,2 bar vom Absolutdruck innerhalb der dann gekapselten Behandlungskammer zu erzeugen. Das erfindungsgemäße Verfahren und die erfindungsgemäße Vorrichtung ermöglichen ein Reinigen, insbesondere der in der Behandlungskammer befindlichen Bauteile des Rotors einer Rundlauf-Tablettenpresse, mit geringem Einsatz an Reinigungs- und Spülmitteln und ein vollständiges Entfernen der eingesetzten Reinigungs- und Spülmittel durch die Anwendung des Unterdruckes von etwa 0,1 bis 0,2 bar vom Absolutdruck innerhalb der gekapselten Behandlungskammer. Die Erzeugung des Vakuums innerhalb der Behandlungskammer ermöglicht ein Trocknen der innerhalb der Behandlungskammer befindlichen Bauteile der Rundlauf-Tablettenpresse selbst in unzugänglichen Öffnungen und Trennfugen des Rotors. Dabei werden noch verbliebene Flüssigkeitsreste mittels des Unterdruckes abgesaugt und über den Unterdruckanschluß abgezogen.To achieve this object, the method according to the invention provides that a cleaning agent and a rinsing agent are sprayed and sucked off again one after the other within the treatment chamber, then all openings of the treatment chamber are closed and a vacuum, in particular from about 0.1 to 0.2 bar , is generated within the encapsulated treatment chamber. The device according to the invention provides that spray heads for spraying the cleaning and rinsing agent are provided within the treatment chamber and connections are provided for suctioning off the cleaning and rinsing agent and that devices for closing all openings of the treatment chamber and a vacuum device which can be connected to them are provided in order to prevent the Negative pressure of about 0.1 to 0.2 bar from the absolute pressure within the encapsulated treatment chamber. The method and the device according to the invention enable cleaning, in particular the components of the rotor of a rotary tablet press located in the treatment chamber, with little use of detergents and dishwashing agents and complete removal of the detergents and dishwashing agents used by applying the negative pressure of approximately 0.1 to 0.2 bar of the absolute pressure within the encapsulated treatment chamber. The generation of the vacuum within the treatment chamber enables the components of the rotary tablet press located within the treatment chamber to dry, even in inaccessible openings and parting lines of the rotor. Remaining liquid residues are sucked off by means of the vacuum and drawn off via the vacuum connection.

Weitere vorteilhafte Ausgestaltungen der Erfindung ergeben sich aus den Unteransprüchen. Besonders vorteilhaft ist es, wenn die Reinigungs- und Spülvorgänge bei einer über der Raumtemperatur liegenden Temperatur, vorzugsweise zwischen 40 und 70 °C, durchgeführt werden. Dabei wird der Rotor vorzugsweise mit kleinen Drehzahlen gedreht. Schließlich kann vor dem Aufbringen des Unterdruckes eine Heißdampfbehandlung des Rotors innerhalb der Behandlungskammer erfolgen, wobei über einen bestimmten Zeitraum Sterilisationsbedingungen eingestellt werden.Further advantageous embodiments of the invention result from the subclaims. It is particularly advantageous if the cleaning and rinsing processes are carried out at a temperature above room temperature, preferably between 40 and 70 ° C. The rotor is preferably rotated at low speeds. Finally, before applying the negative pressure, the rotor can be subjected to superheated steam treatment within the treatment chamber, sterilization conditions being set over a certain period of time.

Das erfindungsgemäße Verfahren wird anschließend anhand der in der Zeichnung dargestellten erfindungsgemäßen Vorrichtung näher erläutert. Die einzige Figur zeigt eine Seitenansicht einer Rundlauf-Tablettenpresse mit innerhalb der Behandlungskammer befindlichem Rotor, wobei bestimmte Bauteile vorher ausgebaut sind.The method according to the invention is then followed explained in more detail with reference to the device according to the invention shown in the drawing. The single figure shows a side view of a rotary tablet press with a rotor located within the treatment chamber, certain components having been removed beforehand.

Die Rundlauf-Tablettenpresse umfaßt einen auf Füßen 2 stehenden Maschinensockel 1 zur Aufnahme der Lagerung und der Antriebselemente des Rotors 3, der innerhalb einer oberhalb des Maschinensockels 1 angeordneten Behandlungskammer 4 angeordnet ist und mit einer weiteren Lagerung im Kopfstück 5 versehen ist. Die Behandlungskammer 4 wird von vier Fensterscheiben 6 umschlossen, die den Rotor 3 einschließen und an vier das Kopfstück 5 auf dem Maschinensockel 1 lagernden Stützen 7 festgelegt sind. Der Maschinensockel 1 umfaßt eine nicht näher dargestellte Deckplatte 8, deren Oberfläche jeweils ein Gefälle von 3 bis 4° zu Auslässen aufweist, an welche Absaugschläuche 9 angeschlossen sind, die zu einem gemeinsamen Abflußstutzen 10 geführt sind. Innerhalb der Behandlungskammer 4 sind mehrere Hochdruck-Sprühdüsen 11 verteilt angeordnet, die unter unterschiedlichen Neigungswinkeln von oben und von unten gegen den Rotor 3 und in den Innenraum der Behandlungskammer 4 gerichtet sind. Im Kopfstück 5 sind ein Zuflußstutzen 12 für Reinigungs- und Spülmittel sowie ein Zuflußstutzen 13 für Heißdampf angebracht, die über nicht näher dargestellte Kanäle im Kopfstück 5 in die Behandlungskammer 4 führen, in welcher der Rotor 3 gelagert ist. Schließlich ist ein Anschlußstutzen 14 am Maschinensockel 1 angebracht, der über einen unterdruckfesten Schlauch 15 mit der Behandlungskammer 4 verbunden ist und an den eine nicht dargestellte Unterdruckeinrichtung zum Aufbringen eines Unterdruckes von 0,1 bis 0,2 bar innerhalb der Behandlungskammer 4 anschließbar ist.The rotary tablet press comprises a machine base 1 standing on feet 2 for receiving the bearing and the drive elements of the rotor 3, which is arranged within a treatment chamber 4 arranged above the machine base 1 and is provided with a further bearing in the head piece 5. The treatment chamber 4 is enclosed by four window panes 6, which enclose the rotor 3 and are fixed to four supports 7 which mount the head piece 5 on the machine base 1. The machine base 1 comprises a cover plate 8, not shown in detail, the surface of which each has a gradient of 3 to 4 ° to outlets, to which suction hoses 9 are connected, which are guided to a common drain connector 10. A plurality of high-pressure spray nozzles 11 are arranged inside the treatment chamber 4 and are directed against the rotor 3 and into the interior of the treatment chamber 4 at different angles of inclination from above and below. In the head piece 5, an inflow nozzle 12 for cleaning and rinsing agents and an inflow nozzle 13 for superheated steam are attached, which lead via channels (not shown) in the head piece 5 into the treatment chamber 4, in which the rotor 3 is mounted. Finally, a connecting piece 14 is attached to the machine base 1, which is connected to the vacuum hose 15 with the Treatment chamber 4 is connected and to which a vacuum device, not shown, for applying a vacuum of 0.1 to 0.2 bar within the treatment chamber 4 can be connected.

Vor Durchführung der Reinigung der in der Behandlungskammer 4 befindlichen Bauteile des Rotors 3 werden einzelne Bauteile demontiert, wie insbesondere Füllschuhe, Ober- und Unterstempel sowie deren Kurven und Druckrollen. Der innerhalb der Behandlungskammer 4 zur Reinigung verbliebene Rotor 3 mit seiner Kurvenglocke 16, seinem Kurventräger 17 und dem Matrizentisch 18 wird nunmehr innerhalb der Behandlungskammer 4 erst einem ersten Reinigungsschritt unterzogen, bei welchem mittels der Hochdruck-Sprühdüsen 11 ein Reinigungsmittel gegen den Rotor 3 und dessen verbliebene Bauteile versprüht wird, wobei der Rotor 3 langsam gedreht wird. Das Reinigungsmittel wird über den Zuflußstutzen 12 zugeführt. Anschließend wird das benutzte Reinigungsmittel wieder über die Absaugschläuche 9 und den Absaugstutzen 10 entfernt. Das Reinigungsmittel kann gefiltert und erneut zugeführt werden.Before cleaning the components of the rotor 3 located in the treatment chamber 4, individual components are dismantled, such as, in particular, filling shoes, upper and lower punches as well as their curves and pressure rollers. The rotor 3 remaining within the treatment chamber 4 for cleaning, with its curved bell 16, its cam carrier 17 and the die table 18, is now only subjected to a first cleaning step in the treatment chamber 4, in which a cleaning agent against the rotor 3 and its rotor is used by means of the high-pressure spray nozzles 11 remaining components is sprayed, the rotor 3 being rotated slowly. The cleaning agent is supplied via the inflow nozzle 12. The cleaning agent used is then removed again via the suction hoses 9 and the suction nozzle 10. The cleaning agent can be filtered and added again.

Im nächsten Reinigungsschritt erfolgt ein Spülen der Behandlungskammer 4 und des darin sich langsam drehenden Rotors 3, wobei über den Zuflußstutzen 12 ein Spülmittel, insbesondere destilliertes Wasser, zugeführt und über die Hochdruck-Spühdüsen 11 gegen den Rotor 3 versprüht wird. Auch das Spülmittel wird anschließend wieder über den Absaugstutzen 10 abgesaugt und kann über Filter gereinigt und erneut verwendet werden.In the next cleaning step, the treatment chamber 4 and the rotor 3 rotating slowly therein are rinsed, a rinsing agent, in particular distilled water, being fed in via the inlet connection 12 and sprayed against the rotor 3 via the high-pressure spray nozzles 11. The detergent is then also sucked off again via the suction nozzle 10 and can be cleaned via filters and used again.

Danach werden alle Öffnungen der Behandlungskammer 4 hermetisch verschlossen, insbesondere der Absaugstutzen 10, der Zuflußstutzen 12 für Reinigungs- und Spülmittel und auch der Zuflußstutzen 13 für Heißdampf sowie der Abflußstutzen 10. Die Fensterscheiben 6, die Deckplatte 8 des Maschinensockels 1 und die Basisplatte des Kopfstückes 5 umschließen die hermetisch gekapselte Behandlungskammer 4. Über den Anschlußstutzen 14 und die daran angeschlossene Unterdruckeinrichtung wird anschließend ein Unterdruck von etwa 0,1 bis 0,2 bar bezogen auf den Absolutdruck innerhalb der dann hermetisch gekapselten Behandlungskammer 4 erzeugt, wodurch die gesamte noch innerhalb der Behandlungskammer 4 an den Fensterscheiben 6 anhaftende Restfeuchtigkeit und insbesondere die innerhalb der Bohrungen und Verbindungsspalten des Rotors 3 verbliebene Restfeuchtigkeit vollständig entfernt werden. Das Restwasser verdampft bei Raumtemperatur und wird über den Anschlußstutzen 24 für die Unterdruckeinrichtung abgezogen.Then all openings of the treatment chamber 4 are hermetically sealed, in particular the suction nozzle 10, the inlet nozzle 12 for cleaning and washing-up liquid and also the inlet nozzle 13 for superheated steam and the outlet nozzle 10. The window panes 6, the cover plate 8 of the machine base 1 and the base plate of the head piece 5 enclose the hermetically sealed treatment chamber 4. Via the connecting piece 14 and the vacuum device connected to it, a negative pressure of about 0.1 to 0.2 bar is then generated based on the absolute pressure within the then hermetically sealed treatment chamber 4, so that the entire still within the Treatment chamber 4 residual moisture adhering to the window panes 6 and in particular the residual moisture remaining within the bores and connecting gaps of the rotor 3 are completely removed. The residual water evaporates at room temperature and is drawn off via the connecting piece 24 for the vacuum device.

Der erste und der zweite Reinigungsschritt werden vorzugsweise bei Temperaturen oberhalb der Raumtemperatur, insbesondere bei Temperaturen zwischen 40 und 70 °C durchgeführt. Dadurch wird beim Öffnen der Behandlungskammer 4 eine Kondenswasserbildung vermieden.The first and the second cleaning step are preferably carried out at temperatures above room temperature, in particular at temperatures between 40 and 70 ° C. This prevents condensation from forming when the treatment chamber 4 is opened.

Das Verfahren ermöglicht die Einhaltung der Reinraumbedingungen für die Herstellung von Nahrungs- und Genußmitteln nach GMP- und FDA-Vorschriften.The process enables compliance with the clean room conditions for the production of food and beverages according to GMP and FDA regulations.

Die Hochdruck-Sprühdüsen 11 können auch als E-förmige Sprühköpfe ausgebildet sein, wobei an den Enden der horizontalen Stege der E-förmigen Sprühköpfe jeweils eine Hochdruck-Sprühdüse angeordnet ist, die z.B. den Matrizentisch 18 beidseits umschließen und in die Bohrungen der Matritzen direkt hineinsprühen.The high-pressure spray nozzles 11 can also be designed as E-shaped spray heads, a high-pressure spray nozzle being arranged at the ends of the horizontal webs of the E-shaped spray heads, which, for example, enclose the die table 18 on both sides and spray directly into the holes in the die.

Claims (8)

  1. Method for cleaning pelleting, sugar-coating and granulating machines, in particular rotary pelleting presses, having a treatment chamber (4) which encloses at least the rotor (3),
    characterized in that,
    inside the treatment chamber (4), a cleaning agent and then a rinsing agent are consecutively sprayed and sucked off again and in that all the openings of the treatment chamber (4) are sealed and an underpressure is generated inside the then enclosed treatment chamber (4).
  2. Method according to Claim 1, characterized in that the underpressure is approximately 0.1 to 0.2 bar of the absolute pressure.
  3. Method according to Claim 1 or 2, characterized in that the temperature inside the treatment chamber (4) is kept above room temperature, preferably between 40 and 70 °C, during the spraying operations.
  4. Method according to Claims 1 to 3, characterized in that the rotor (3) is rotated during the spraying operations.
  5. Method according to one of the Claims 1 to 4, characterized in that, after the spraying operation and before the establishment of the reduced pressure, superheated steam enters the enclosed treatment chamber (4) and the enclosed treatment chamber (4) is kept at a specified sterilization temperature for a predetermined sterilization time.
  6. Device for carrying out the method according to one of Claims 1 to 4, characterized in that, inside the treatment chamber (4), spray nozzles (11) are provided for spraying the cleaning agent and the rinsing agent and in that connecting pipe pieces (10,14) are provided for sucking off the cleaning agent and rinsing agent and for a reduced-pressure device for generating a reduced pressure of about 0.1 to 0.2 bar inside the hermetically enclosed treatment chamber (4).
  7. Device according to Claim 6, characterized in that, for the purpose of emptying the treatment chamber (4) in as residue-free a manner as possible, the base surface has a gradient of 3 to 4°.
  8. Device according to Claim 6 or 7, characterized in that the high-pressure spray nozzels (11) are formed at the ends of the horizontal bars of E-shaped spraying heads.
EP94250195A 1993-07-31 1994-08-01 Method and apparatus for the cleaning of tablet, pill or granule making machines, in particular of rotary tabletting machines Expired - Lifetime EP0637507B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4326239A DE4326239C2 (en) 1993-07-31 1993-07-31 Tableting, coating or granulating machine, in particular rotary tablet press
DE4326239 1993-07-31

Publications (2)

Publication Number Publication Date
EP0637507A1 EP0637507A1 (en) 1995-02-08
EP0637507B1 true EP0637507B1 (en) 1997-05-14

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EP94250195A Expired - Lifetime EP0637507B1 (en) 1993-07-31 1994-08-01 Method and apparatus for the cleaning of tablet, pill or granule making machines, in particular of rotary tabletting machines

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US (1) US5536331A (en)
EP (1) EP0637507B1 (en)
DE (2) DE4326239C2 (en)
ES (1) ES2101435T3 (en)

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DE102009013180B3 (en) * 2009-03-14 2010-07-01 Fette Gmbh Method and device for cleaning a suction system for a rotary press
CN104138874A (en) * 2014-07-31 2014-11-12 广西北流仲礼瓷业有限公司 Rotating disc type dust remover for ceramic production
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ES2101435T3 (en) 1997-07-01
DE4326239A1 (en) 1995-02-02
EP0637507A1 (en) 1995-02-08
DE59402722D1 (en) 1997-06-19
US5536331A (en) 1996-07-16
DE4326239C2 (en) 1997-06-05

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