EP0842763B1 - Apparatus for the controlled spraying of a lubricating product in powder form on punches and dies in tablet presses - Google Patents
Apparatus for the controlled spraying of a lubricating product in powder form on punches and dies in tablet presses Download PDFInfo
- Publication number
- EP0842763B1 EP0842763B1 EP97119143A EP97119143A EP0842763B1 EP 0842763 B1 EP0842763 B1 EP 0842763B1 EP 97119143 A EP97119143 A EP 97119143A EP 97119143 A EP97119143 A EP 97119143A EP 0842763 B1 EP0842763 B1 EP 0842763B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lubricant
- sensor
- output signal
- pressing tools
- suction
- 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
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
- B05B7/1404—Arrangements for supplying particulate material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/084—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to condition of liquid or other fluent material already sprayed on the target, e.g. coating thickness, weight or pattern
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
- B05B14/10—Arrangements for collecting, re-using or eliminating excess spraying material the excess material being particulate
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/0005—Details of, or accessories for, presses; Auxiliary measures in connection with pressing for briquetting presses
- B30B15/0011—Details of, or accessories for, presses; Auxiliary measures in connection with pressing for briquetting presses lubricating means
Definitions
- the present invention relates to a device for spraying powdered lubricants on punches and dies of tablet presses.
- the literature describes lubricant systems that contain the lubricant both in liquid form (as a dispersion in alcoholic solvents) and Spray in powder form on the punches and matrices of tablet presses.
- EP 262 538 describes a system that takes a lubricant from a reservoir transported to a nozzle via a pump.
- the pump is here with the tablet machine synchronized.
- the lubricant consists of an alcoholic lubricant dispersion, which for GMP reasons is more problematic than using the powdered lubricant.
- EP 0 336 197 describes the targeted delivery of metered amounts of finely divided Solids described with a Venturi nozzle. It is from one discontinuous control for lubricant transport. It is also no regulation for the addition of lubricant is provided. Furthermore stand at this device the lubricant supply, the delivery system and the nozzle right next to the tablet press and, for GMP reasons, cannot be in one be moved to another room.
- GB 2 053 787 A discloses a lubricant system in which the powdered lubricant on the surface of the lower tablet stamp is placed and after a short distance on the stamp orbit the Lubricant is swirled by the injection of air in such a way that it too Surface of the upper tablet stamp and the walls of the stamp guide are covered. Excess lubricant is sucked off.
- the stamps are with a sensor connected, the amount of depending on the weight of a pressed tablet introduced lubricant controls.
- No. 4,047,866 describes a lubricant system in which the lubricant then sprayed with an air stream onto the surface of the tablet stamp becomes when the output signal of a sensor connected to the stamp a reached certain value.
- the sensor is a force sensor that is used for the measures the force required to eject the tablets from the punch.
- the invention is an improvement on a device for Spraying the pressing tools in a tablet press with one in an air stream dispersed powdered lubricants or release agents.
- This device exists from at least one spray nozzle for loading the pressing tools with the powder-containing air flow, a suction system for suctioning off the excess Lubricant residues on the pressing tools and a dosing device with one Air jet injector for the reproducible loading of the air flow with the lubricant.
- the task is based on the lubricant supply to improve the tablet press in such a way that even with critical, Adequate lubrication of the pressing tools is always required for tablets that tend to stick with the powdered lubricant and by applying Operational faults caused by tabletting on the stamp surfaces are safe be avoided.
- the pressing tools Tablet press are operatively connected to a sensor that is one for the Characterization of the pressing tool surfaces with the lubricant characteristic Output signal generated that controls the amount of air extracted from the suction system. It the amount of air extracted is adjusted in such a way that a sufficient Occupancy of the press tool surfaces with the lubricant is ensured. It is also possible and in many cases an advantage if a readjustment of the extracted air volume with an adjustment of the load of the air flow is combined. This special feedback makes it independent of Operating state a needs-based, reproducibly adjustable, optimal Lubrication of the pressing tools guaranteed.
- the sensor is e.g. a force sensor suitable for the one to eject the Tablets required force from the pressing tools characteristic output signal generated.
- a sensor which consists of an optical reflection sensor to detect the reflected on the surface of the pressing tools Light exists.
- the effect of this optical sensor is based on the fact that at a less coating of the stamp surfaces with the powdered lubricant Light is reflected, so that the sensor signal decreases.
- the senor is connected to a control circuit which, when the sensor output signal changes, adjusts the suction power of the suction system and thus the occupancy of the press tool surfaces with the lubricant in such a way that the deviation of the sensor output signal from a preset one Setpoint S 0 or K 0 is minimized.
- the suction power of the suction system is therefore used as a manipulated variable to readjust the lubricant occupancy and thus the intensity and effectiveness of the lubrication. With a lower suction, a larger proportion of lubricant adheres to the press ram surfaces. With a stronger suction, however, more powder is sucked off, so that the occupancy is lower.
- the control is carried out in such a way that the force sensor causes the suction system to reduce the suction power when the output signal increases up to a limit value K 1 .
- a reflection sensor is preferably used as a sensor for the assignment.
- the regulation is carried out so that the reflection sensor causes the suction system to increase the suction power when its output signal decreases up to a limit value S 1 .
- a further development of the invention is characterized in that the output signal of the force sensor when the limit value K 1 is exceeded or the output signal of the reflection sensor when the limit value S 1 is undershot causes the metering device to meter in more lubricant into the air stream flowing to the spray nozzle until the limit value K 1 again falls below or the limit value S 1 is exceeded again.
- the product tablette material
- the sensor signals a further increased tablet ejection force or (in the case of the optical sensor) a further reduced reflection despite the reduction in the lubricant suction.
- the even greater intensification of the lubrication required in this case can obviously no longer be achieved here by further reducing the lubricant suction.
- a return to the normal control state is then only possible with a stronger loading of the air flow with the powdered lubricant.
- the stronger load is therefore introduced as an auxiliary manipulated variable when the adjustment of the suction power is no longer sufficient to trace the controlled variable, ie the sensor signal characteristic of the lubrication of the press tools, to the setpoint. As already mentioned, experience has shown that this occurs when product settles on the surfaces of the pressing tools.
- Another important improvement of the invention is that the spray nozzle for the application of the lubricant to the pressing tools together with the suction device to remove the excess lubricant in the filling shoe the tablet press is installed. If necessary, it can also be used for removal of the ejected tablets wipers also attached to the filling shoe become.
- This integrated space-saving design has the advantage that existing ones Tablet presses easily retrofitted with the new lubricant system can be.
- the dosing device for feeding the powdered lubricant into the Conveying air flow generated with an injector suitably consists of a Stirrer arms and a vertically positioned storage container, which has a discharge opening on its bottom.
- an injector suitably consists of a Stirrer arms and a vertically positioned storage container, which has a discharge opening on its bottom.
- For further transport of the discharged Powder in the air jet injector advantageously serves one below the discharge opening of the storage container arranged vibratory conveyor trough (vibrating trough).
- the powdered lubricant e.g. Magnesium stearate
- a cylindrical storage container 1 In the storage container 1 an agitator 2 with a basket-like agitator 3 and agitator blades 4 is installed. The agitator 2 is driven by a speed-controlled motor 5. The revolving agitator 2 continuously loosens the lubricant in the container and trickles through the outlet opening 6 (see FIG. Fig. 3) on the bottom of the storage container 1 attached to a below the storage container Vibrating trough 7 (vibrating conveyor) leading to the filling opening 8 of an air jet injector 9 leads. The air jet injector 9 is connected to a compressed air source via a valve 10 connected.
- the powdered lubricant is in the Air jet injector 9 sucked in and through a hose 12 that is several meters long can be built into the filling shoe 13 of a rotary tablet press Spray nozzle 14 promoted (see. Fig. 2).
- the slit-shaped spray nozzle 14 divides the air jet charged with the lubricant in the direction of upper punch 15a and lower punch 15b of the tablet press. With the help of this nozzle construction it is possible to use upper and lower stamps Spray the die of the tablet press with the lubricant. Also in the A filling device 16 is installed to remove the excess, lubricant not adhering to the press tool surfaces. It consists of one arranged in the direction of the press ram behind the spray nozzle 14, also Integrated, conically expanded suction opening in the filling shoe, which with a Suction line 17 is connected (see FIG. 1). Furthermore, here is the one to redirect Ejection chute required tablet wipers 18 to save space the filling shoe 13 attached and not, as usual, directly on the Tablet press.
- the suction line 17 is via a control valve 19 with a suction pump 20 connected.
- the suction power at the Suction opening 16 can be varied. It has been found that the suction power is suitable
- the manipulated variable represents the assignment of the press ram surfaces with the Control lubricant. The occupancy increases with decreasing suction power and conversely, with increasing suction power.
- the coating of the press ram surfaces with the lubricant is done with the help a reflection sensor 21 measured, behind the tablet stamp in the running direction the suction device 16 to the side of the passing stamp on the tablet press is appropriate.
- the reflection sensor 21 is a commercially available one Component in which the primary light and the measuring light are fed in or out through light guides becomes.
- the measuring light is photoelectrically converted into an electrical measuring signal converted, which is inversely proportional to the occupancy of the lubricant is. The greater the occupancy, the lower the intensity of the stamp surface reflected light and the smaller the size of the measurement signal.
- the Measuring signal is amplified (measuring amplifier 22) and a control unit 23 fed, whose function is described below:
- the control unit 23 comprises an input for the measuring line 24 and four outputs for control lines.
- the control line 25 is connected to the metering device 2, the control line 26 to the vibrating trough 7, the control line 27 to the air jet injector valve 10 and the control line 28 to the control valve 19 in the suction line 17.
- the normal operating state of the control unit 23 is characterized in that when the measurement signal at the reflection sensor 21 decreases, which corresponds to an increase in the coating of the stamp surface with lubricant, the suction power at the suction opening 16 is increased in that the control valve 19 via the control line 28 further opened and vice versa when the reflection signal increases (corresponding to a decrease in the lubricant occupancy) to reduce the suction power more closed.
- a low lubrication leads to a large measured value
- a strong lubrication leads to a small measured value.
- the valve 19 and thus the suction power is now adjusted by the control unit 23 so that the lubricant occupancy of the pressing tools is kept at a predetermined target value S 0 , or the deviation from this target value is minimized.
- the speed of the metering motor 5 and thus also the amount of lubricant metered into the air jet injector 9 is increased until the product build-up on the stamps disappears via the control line 25.
- the measured value then again exceeds the limit value S 1 , so that the control can be returned to the normal control range, in which the suction power is again used as a control variable for the lubricant occupancy.
- the oscillation frequency of the vibrating trough 7 (via the control line 26) and the flow rate of the conveying air into the air jet injector 9 (via the valve 10 and the control line 27) can be adjusted by the control unit 23 when the lubricant is metered in at an increased rate.
- a force sensor can also be used, which measures the force (ejection force) required to eject the finished tablets from the die of the tablet press.
- force sensors are already installed in most commercially available tablet presses. This makes use of the functional connection that the ejection force decreases with increasing lubricant occupancy and increases with decreasing lubricant occupancy.
- the measured ejection force is compared with a preselected setpoint K 0 and the suction power is adjusted so that the deviation from this setpoint is again as small as possible.
- the option of increasing the powder load in the conveying air flow can be used if experience shows that after a limit value K 1 for the ejection force is exceeded, the change in suction power in the case of product build-up on the stamp surfaces is no longer sufficient, the originally set target value K 0 for regulate the ejection force.
- a variant of the invention is that not the suction on the ram is used as a manipulated variable to determine the lubricant occupancy of the ram surfaces readjust, but from the outset the powder loading of the injector airflow.
- the suction power is kept constant and only that Dosing rate for the dosing of the lubricant into the injector air flow and if necessary also adjusted the amount of injector air so that the difference between the actual value measured with the force sensor or reflection sensor Lubricant occupancy and the setpoint Ko or So brought to zero (minimized) becomes.
- this type of control may have a higher lubricant consumption result.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Presses And Accessory Devices Thereof (AREA)
- Medical Preparation Storing Or Oral Administration Devices (AREA)
- Mounting, Exchange, And Manufacturing Of Dies (AREA)
- Spray Control Apparatus (AREA)
- Medicinal Preparation (AREA)
- Nozzles (AREA)
- Forging (AREA)
Abstract
Description
Die vorliegende Erfindung betrifft eine Vorrichtung zum Aufsprühen von pulverförmigen Schmiermitteln auf Stempel und Matrizen von Tablettenpressen.The present invention relates to a device for spraying powdered lubricants on punches and dies of tablet presses.
In der Literatur werden Schmiermittelsysteme beschrieben, die das Schmiermittel sowohl in flüssiger Form (als Dispersion in alkoholischen Lösungsmitteln) als auch pulverförmig auf Stempel und Matrizen von Tablettenpressen aufsprühen.The literature describes lubricant systems that contain the lubricant both in liquid form (as a dispersion in alcoholic solvents) and Spray in powder form on the punches and matrices of tablet presses.
In EP 262 538 wird ein System beschrieben, das ein Schmiermittel aus einem Reservoir über eine Pumpe zu einer Düse transportiert. Die Pumpe ist hierbei mit der Tablettenmaschine synchronisiert. Das Schmiermittel besteht aus einer alkoholischen Schmiermitteldispersion, die aus GMP-Gründen problematischer ist als die Verwendung des pulverförmigen Schmiermittels.EP 262 538 describes a system that takes a lubricant from a reservoir transported to a nozzle via a pump. The pump is here with the tablet machine synchronized. The lubricant consists of an alcoholic lubricant dispersion, which for GMP reasons is more problematic than using the powdered lubricant.
Ähnliches gilt für die Vorrichtungen gemäß DE 42 03 273. Diesen Vorrichtungen ist gemeinsam, daß eine flüssige Schmiermitteldispersion mit den genannten Nachteilen versprüht wird.The same applies to the devices according to DE 42 03 273. These devices are common that a liquid lubricant dispersion with the disadvantages mentioned is sprayed.
Ferner wird in EP 0 336 197 die gezielte Abgabe dosierter Mengen von feinverteilten Feststoffen mit einer Venturi-Düse beschrieben. Dabei wird von einer diskontinuierlichen Steuerung für den Schmiermitteltransport Gebrauch gemacht. Es ist auch keine Regelung für die Schmiermittelzugabe vorgesehen. Weiterhin stehen bei dieser Vorrichtung der Schmiermittelvorrat, das Fördersystem und die Düse unmittelbar neben der Tablettenpresse und können aus GMP-Gründen nicht in einen anderen Raum verlagert werden.Furthermore, EP 0 336 197 describes the targeted delivery of metered amounts of finely divided Solids described with a Venturi nozzle. It is from one discontinuous control for lubricant transport. It is also no regulation for the addition of lubricant is provided. Furthermore stand at this device the lubricant supply, the delivery system and the nozzle right next to the tablet press and, for GMP reasons, cannot be in one be moved to another room.
GB 2 053 787 A offenbart ein Schmiermittelsystem, bei dem zunächst das
pulverförmige Schmiermittel auf die Oberfläche der unteren Tablettenstempel
platziert wird und nach einer kurzen Wegstrecke auf der Stempelumlaufbahn das
Schmiermittel durch Eindüsung von Luft so verwirbelt wird, dass es auch die
Oberfläche der oberen Tablettenstempel und die Wände der Stempelführung belegt.
Überflüssiges Schmiermittel wird abgesaugt. Die Stempel sind mit einem Sensor
verbunden, der abhängig vom Gewicht einer gepressten Tablette die Menge an
eingebrachtem Schmiermittel steuert.
In US 4,047,866 ist ein Schmiermittelsystem beschrieben, bei dem das Schmiermittel immer dann mit einem Luftstrom auf die Oberfläche der Tablettenstempel eingedüst wird, wenn das Ausgangssignals eines mit dem Stempel verbundenen Sensors einen bestimmten Wert erreicht. Der Sensor ist dabei ein Kraftmessfühler, der die für die zum Ausstoßen der Tabletten aus dem Stempel erforderliche Kraft misst.No. 4,047,866 describes a lubricant system in which the lubricant then sprayed with an air stream onto the surface of the tablet stamp becomes when the output signal of a sensor connected to the stamp a reached certain value. The sensor is a force sensor that is used for the measures the force required to eject the tablets from the punch.
Bei der Erfindung handelt es sich um eine Verbesserung an einer Vorrichtung zum Besprühen der Preßwerkzeuge in einer Tablettenpresse mit einem in einem Luftstrom dispergierten pulverförmigen Schmier- oder Trennmittel. Diese Vorrichtung besteht aus mindestens einer Sprühdüse zur Beaufschlagung der Preßwerkzeuge mit dem pulverhaltigen Luftstrom, einem Saugsystem zur Absaugung der überschüssigen Schmiermittelreste an den Preßwerkzeugen und einer Dosiereinrichtung mit einem Luftstrahlinjektor zur reproduzierbaren Beladung des Luftstroms mit dem Schmiermittel.The invention is an improvement on a device for Spraying the pressing tools in a tablet press with one in an air stream dispersed powdered lubricants or release agents. This device exists from at least one spray nozzle for loading the pressing tools with the powder-containing air flow, a suction system for suctioning off the excess Lubricant residues on the pressing tools and a dosing device with one Air jet injector for the reproducible loading of the air flow with the lubricant.
Ausgehend von dieser Vorrichtung liegt die Aufgabe zugrunde, die Schmiermittelzuführung zur Tablettenpresse in der Weise zu verbessern, daß auch bei kritischem, zum Anbacken neigenden Tablettiergut stets eine ausreichende Schmierung der Preßwerkzeuge mit dem pulverförmigen Schmiermittel erfolgt und durch Ansetzen von Tablettiergut an den Stempeloberflächen bedingte Betriebsstörungen sicher vermieden werden.Starting from this device, the task is based on the lubricant supply to improve the tablet press in such a way that even with critical, Adequate lubrication of the pressing tools is always required for tablets that tend to stick with the powdered lubricant and by applying Operational faults caused by tabletting on the stamp surfaces are safe be avoided.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß die Preßwerkzeuge der Tablettenpresse mit einem Sensor in Wirkverbindung stehen, der ein für die Belegung der Preßwerkzeug-Oberflächen mit dem Schmiermittel charakteristisches Ausgangssignal erzeugt, das die am Saugsystem abgesaugte Luftmenge steuert. Es wird also die abgesaugte Luftmenge derart nachgestellt, daß eine ausreichende Belegung der Preßwerkzeug-Oberflächen mit dem Schmiermittel sichergestellt ist. Es ist aber auch möglich und in vielen Fällen von Vorteil, wenn eine Nachstellung der abgesaugten Luftmenge mit einer Nachstellung der Beladung des Luftstroms kombiniert wird. Durch diese spezielle Rückkopplung wird unabhängig vom Betriebszustand eine bedarfsgerechte, reproduzierbar einstellbare, optimale Schmierung der Preßwerkzeuge gewährleistet.This object is achieved in that the pressing tools Tablet press are operatively connected to a sensor that is one for the Characterization of the pressing tool surfaces with the lubricant characteristic Output signal generated that controls the amount of air extracted from the suction system. It the amount of air extracted is adjusted in such a way that a sufficient Occupancy of the press tool surfaces with the lubricant is ensured. It is also possible and in many cases an advantage if a readjustment of the extracted air volume with an adjustment of the load of the air flow is combined. This special feedback makes it independent of Operating state a needs-based, reproducibly adjustable, optimal Lubrication of the pressing tools guaranteed.
Als Sensor ist z.B. ein Kraftmeßfühler geeignet, der ein für die zum Ausstoßen der Tabletten aus den Preßwerkzeugen erforderliche Kraft charakteristisches Ausgangssignal erzeugt.The sensor is e.g. a force sensor suitable for the one to eject the Tablets required force from the pressing tools characteristic output signal generated.
Vorteilhaft wird jedoch ein Sensor eingesetzt, der aus einem optischen Reflexionssensor zur Erfassung des an der Oberfläche der Preßwerkzeuge reflektierten Lichts besteht. Die Wirkung dieses optischen Sensors berubt darauf, daß bei einer stärkeren Belegung der Stempeloberflächen mit dem pulverförmigen Schmiermittel weniger Licht reflektiert wird, so daß das Sensorsignal abnimmt. However, a sensor is advantageously used which consists of an optical reflection sensor to detect the reflected on the surface of the pressing tools Light exists. The effect of this optical sensor is based on the fact that at a less coating of the stamp surfaces with the powdered lubricant Light is reflected, so that the sensor signal decreases.
Gemäß einer bevorzugten Ausführung der Erfindung ist der Sensor mit einem Regelkreis verbunden, der bei einer Änderung des Sensor-Ausgangssignals die Absaugleistung des Saugsystems und damit die Belegung der Preßwerkzeug-Oberflächen mit dem Schmiermittel so nachregelt, daß die Abweichung des Sensor-Ausgangssignals von einem voreingestellten Sollwert S0 oder K0 minimiert wird. Die Absaugleistung des Saugsystems wird also als Stellgröße benutzt, um die Belegung mit Schmiermittel und damit die Intensität und Wirksamkeit der Schmierung nachzuregeln. Bei einer geringeren Absaugung bleibt nämlich ein größerer Schmiermittelanteil auf den Preßstempel-Oberflächen haften. Bei einer stärkeren Absaugung wird dagegen mehr Pulver abgesaugt, so daß die Belegung geringer wird.According to a preferred embodiment of the invention, the sensor is connected to a control circuit which, when the sensor output signal changes, adjusts the suction power of the suction system and thus the occupancy of the press tool surfaces with the lubricant in such a way that the deviation of the sensor output signal from a preset one Setpoint S 0 or K 0 is minimized. The suction power of the suction system is therefore used as a manipulated variable to readjust the lubricant occupancy and thus the intensity and effectiveness of the lubrication. With a lower suction, a larger proportion of lubricant adheres to the press ram surfaces. With a stronger suction, however, more powder is sucked off, so that the occupancy is lower.
Bei Verwendung eines Kraftsensors als Meßfühler für die Belegung wird die Regelung so ausgeführt, daß der Kraftsensor bei einer Zunahme des Ausgangssignals bis zu einem Grenzwert K1 das Saugsystem zur Verringerung der Absaugleistung veranlaßt.When using a force sensor as a sensor for the occupancy, the control is carried out in such a way that the force sensor causes the suction system to reduce the suction power when the output signal increases up to a limit value K 1 .
Wie schon erwähnt, wird jedoch vorzugsweise ein Refexionssensor als Meßfühler für die Belegung verwendet. In diesem Fall ist die Regelung dann so ausgefüht, daß der Reflexionssensor bei einer Abnahme seines Ausgangssignals bis zu einem Grenzwert S1 das Saugsystem zu einer Erhöhung der Absaugleistung veranlaßt.As already mentioned, however, a reflection sensor is preferably used as a sensor for the assignment. In this case, the regulation is carried out so that the reflection sensor causes the suction system to increase the suction power when its output signal decreases up to a limit value S 1 .
Eine Weiterentwicklung der Erfindung ist dadurch gekennzeichnet, daß das Ausgangssignal des Kraftsensors bei Überschreitung des Grenzwerts K1 oder das Ausgangssignal des Reflexionssensors bei Unterschreitung des Grenzwerts S1 die Dosiereinrichtung zu einer erhöhten Eindosierung von Schmiermittel in den zur Sprühdüse strömenden Luftstrom veranlaßt, bis der Grenzwert K1 wieder unterschritten bzw. der Grenzwert S1 wieder überschritten wird. Auf diese Weise wird einem Betriebszustand Rechnung getragen, bei dem sich Produkt (Tablettiergut) an den Stempeloberflächen abzusetzen beginnt und der Sensor trotz Verringerung der Schmiermittelabsaugung eine weiter erhöhte Tabletten-Ausstoßkraft oder (im Falle des optischen Sensors) eine weiter verringerte Reflexion signalisiert. Die in diesem Fall erforderliche noch stärkere Intensivierung der Schmierung kann hier offensichtlich durch eine weitere Verringerung der Schmiermittelabsaugung nicht mehr erreicht werden. Eine Rückführung in den normalen Regelzustand ist dann nur noch mit Hilfe einer stärkeren Beladung des Luftstroms mit dem pulverförmigen Schmiermittel möglich. Die stärkere Beladung wird also als Hilfsstellgröße eingeführt, wenn die Nachstellung der Absaugleistung nicht mehr ausreicht, die Regelgröße, d.h. das für die Schmiermittelbelegung der Preßwerkzeuge charakteristische Sensorsignal, auf den Sollwert zurückzuführen. Wie schon erwähnt, tritt erfahrungsgemäß dieser Fall ein, wenn sich an den Oberflächen der Preßwerkzeuge Produkt absetzt.A further development of the invention is characterized in that the output signal of the force sensor when the limit value K 1 is exceeded or the output signal of the reflection sensor when the limit value S 1 is undershot causes the metering device to meter in more lubricant into the air stream flowing to the spray nozzle until the limit value K 1 again falls below or the limit value S 1 is exceeded again. In this way, an operating state is taken into account in which the product (tablet material) begins to settle on the stamp surfaces and the sensor signals a further increased tablet ejection force or (in the case of the optical sensor) a further reduced reflection despite the reduction in the lubricant suction. The even greater intensification of the lubrication required in this case can obviously no longer be achieved here by further reducing the lubricant suction. A return to the normal control state is then only possible with a stronger loading of the air flow with the powdered lubricant. The stronger load is therefore introduced as an auxiliary manipulated variable when the adjustment of the suction power is no longer sufficient to trace the controlled variable, ie the sensor signal characteristic of the lubrication of the press tools, to the setpoint. As already mentioned, experience has shown that this occurs when product settles on the surfaces of the pressing tools.
Für den Fall, daß besonders hohe Anforderungen an die Dosiergenauigkeit gestellt werden, kann es es zweckmäßig sein, eine zusätzliche, mit der Dosiervorrichtung zusammenarbeitende Regelvorrichtung einzubauen, um eine hohe Konstanz der Beladung des Förderluftstroms mit dem Schmiermittel zu gewährleisten.In the event that particularly high demands are placed on the dosing accuracy be, it may be appropriate to an additional, cooperating with the metering device Install control device to ensure a high consistency of the load to ensure the conveying air flow with the lubricant.
Ein weitere wichtige Verbesserung der Erfindung besteht darin, daß die Sprühdüse für die Beaufschlagung der Preßwerkzeuge mit dem Schmiermittel zusammen mit der Absaugeinrichtung zur Entfernung des überschüssigen Schmiermittels in den Füllschuh der Tablettenpresse eingebaut ist. Im Bedarfsfall kann auch noch der zum Abtransport der ausgestoßenen Tabletten erforderliche Abstreifer ebenfalls am Füllschuh befestigt werden. Diese integrierte platzsparende Bauweise hat den Vorteil, daß bereits vorhandene Tablettenpressen mit dem neuen Schmiermittelsystem problemlos nachgerüstet werden können.Another important improvement of the invention is that the spray nozzle for the application of the lubricant to the pressing tools together with the suction device to remove the excess lubricant in the filling shoe the tablet press is installed. If necessary, it can also be used for removal of the ejected tablets wipers also attached to the filling shoe become. This integrated space-saving design has the advantage that existing ones Tablet presses easily retrofitted with the new lubricant system can be.
Die Dosiereinrichtung für die Einspeisung des pulverförmigen Schmiermittels in den mit einem Injektor erzeugten Förderluftstrom besteht zweckmäßig aus einem mit Rührarmen und einem Rührkorb versehenen, vertikal aufgestellten Vorratsbehälter, der an seinem Boden eine Austragsöffnung aufweist. Zum Weitertransport des ausgetragenen Pulvers in den Luftstrahlinjektor dient vorteilhaft eine unterhalb der Austragsöffnung des Vorratsbehälters angeordnete Schwingförderrinne (Rüttelrinne).The dosing device for feeding the powdered lubricant into the Conveying air flow generated with an injector suitably consists of a Stirrer arms and a vertically positioned storage container, which has a discharge opening on its bottom. For further transport of the discharged Powder in the air jet injector advantageously serves one below the discharge opening of the storage container arranged vibratory conveyor trough (vibrating trough).
Mit der Erfindung werde folgende Vorteile erzielt:
- Das neue geregelte Schmiermittelsystem gewährleistet auch bei der Tablettierung von kritischen, zum Ansetzen neigenden Produkten eine zuverlässige und betriebssichere Schmierung der Stempeloberflächen in der Tablettiermaschine. Dadurch können Betriebssicherheit und Standzeit verbessert werden.
- Da nur wenige zusätzliche Bauteile erforderlich sind, die im Füllschuh der Tablettenpresse integriert werden können, ist es ohne große Schwierigkeiten möglich, auch bereits vorhandene Anlagen mit relativ geringen Kosten nachzurüsten. Insbesondere können auch bei Tablettenpressen mit engen Raumverhältnissen im Füllschuhbereich die Vorteile der externen Tablettenschmierung realisiert werden.
- Das Konstruktionsprinzip des erfindungsgemäßen Schmiermittelsystems ermöglicht eine räumlich getrennte Aufstellung des Schmiermittelvorrats und der pneumatischen Fördereinrichtung von der Tablettenpresse, so daß die Voraussetzungen für einen GMP-gerechten Betrieb erfüllt sind.
- The new regulated lubricant system also guarantees reliable and reliable lubrication of the punch surfaces in the tabletting machine when tabletting critical products that tend to start. This can improve operational reliability and service life.
- Since only a few additional components are required, which can be integrated in the filling shoe of the tablet press, it is possible without great difficulty to retrofit existing systems at relatively low costs. In particular, the advantages of external tablet lubrication can also be realized with tablet presses with limited space in the filling shoe area.
- The design principle of the lubricant system according to the invention enables a spatially separate installation of the lubricant supply and the pneumatic conveying device from the tablet press, so that the requirements for GMP-compliant operation are met.
Im folgenden wird die Erfindung an Hand eines in den Zeichnungen dargestellten Ausführungsbeispiels näher erläutert. Es zeigen:
- Fig. 1
- das Regelschema für die Schmiermittelzugabe
- Fig. 2
- eine Draufsicht eines modifizierten Füllschuhs mit den zum Schmiermittelsystem gehörenden Einbauten und
- Fig. 3
- die Dosier- und Fördereinrichtung für das pulverförmige Schmiermittel
- Fig. 1
- the control scheme for the addition of lubricant
- Fig. 2
- a plan view of a modified filling shoe with the internals belonging to the lubricant system and
- Fig. 3
- the dosing and conveying device for the powdered lubricant
Gemäß Fig. 1 und Fig. 3 befindet sich das pulverförmige Schmiermittel, z.B.
Magnesiumstearat, in einem zylindrischen Vorratsbehälter 1. In den Vorratsbehälter 1
ist ein Rührwerk 2 mit einem korbähnlichen Rührkörper 3 und Rührflügeln 4 eingebaut.
Das Rührwerk 2 wird von einem Drehzahl-gesteuerten Motor 5 angetrieben.
Durch das umlaufende Rührwerk 2 wird das Schmiermittel im Behälter ständig aufgelockert
und rieselt im gleichmäßigen Produktstrom durch die Austrittsöffnung 6 (s.
Fig. 3) am Boden des Vorratsbehälters 1 auf eine unterhalb des Vorratsbehälters angebrachte
Rüttelrinne 7 (Schwingförderer), die zur Einfüllöffnung 8 eines Luftstrahlinjektors
9 führt. Der Luftstrahlinjektor 9 ist über ein Ventil 10 mit einer Druckluftquelle
verbunden. Mit dem Ventil 10 wird die Luftmenge und damit die Förderleistung
des Luftstrahlinjektors 9 gesteuert. Das pulverförmige Schmiermittel wird im
Luftstrahlinjektor 9 angesaugt und durch einen Schlauch 12, der mehrere Meter lang
sein kann, zu einer in den Füllschuh 13 einer Rundläufer-Tablettenpresse eingebauten
Sprühdüse 14 gefördert (s. Fig. 2).According to Figures 1 and 3, the powdered lubricant, e.g.
Magnesium stearate, in a cylindrical storage container 1. In the storage container 1
an
Die schlitzförmige Sprühdüse 14 teilt den mit dem Schmiermittel beschickten Luftstrahl
in Richtung auf Oberstempel 15a und Unterstempel 15b der Tablettenpresse.
Mit Hilfe dieser Düsenkonstruktion ist es möglich, Ober- und Unterstempel und die
Matrize der Tablettenpresse mit dem Schmiermittel zu besprühen. Ebenfalls in den
Füllschuh eingebaut ist eine Absaugeinrichtung 16 zur Entfernung des überschüssigen,
nicht auf den Preßwerkzeug-Oberflächen haftenden Schmiermittels. Sie besteht aus
einer in Laufrichtung der Preßstempel hinter der Sprühdüse 14 angeordneten, ebenfalls
im Füllschuh integrierten, konisch erweiterten Absaugöffnung, die mit einer
Saugleitung 17 verbunden ist (s. Fig. 1). Weiterhin ist hier der zum Umlenken in einen
Auswurfschacht erforderliche Tablettenabstreifer 18 aus Platzersparnisgründen an
dem Füllschuh 13 angebracht und nicht, wie sonst üblich, direkt an der
Tablettenpresse. Die Saugleitung 17 ist über ein Regelventil 19 mit einer Saugpumpe
20 verbunden. Mit dem ferneinstellbaren Regelventil 19 kann die Saugleistung an der
Absaugöffnung 16 variiert werden. Es wurde gefunden, daß die Saugleistung eine geeignete
Stellgröße darstellt, um die Belegung der Preßstempel-Oberflächen mit dem
Schmiermittel zu steuern. Die Belegung nimmt mit abnehmender Saugleistung zu und
umgekehrt mit wachsender Saugleistung ab.The slit-shaped
Die Belegung der Preßstempel-Oberflächen mit dem Schmiermittel wird mit Hilfe
eines Reflexionssensors 21 gemessen, der in Laufrichtung der Tablettenstempel hinter
der Absaugeinrichtung 16 seitlich der vorbeilaufenden Stempel an der Tablettenpresse
angebracht ist. Bei dem Reflexionssensor 21 handelt es sich um ein handelsübliches
Bauelement, bei dem das Primärlicht und das Meßlicht durch Lichtleiter zu- bzw. abgeführt
wird. Das Meßlicht wird dabei photoelektrisch in ein elektrisches Meßsignal
umgewandelt, das umgekehrt proportional zu der Belegung mit dem Schmiermittel
ist. Je größer also die Belegung, desto kleiner ist die Intensität des an der Stempeloberfläche
reflektierten Lichts und desto kleiner auch die Größe des Meßsignals. Das
Meßsignal wird verstärkt (Meßverstärker 22) und einer Steuer- bzw. Regeleinheit 23
zugeführt, deren Funktion nachfolgend beschrieben wird:The coating of the press ram surfaces with the lubricant is done with the help
a
Die Regeleinheit 23 umfaßt einen Eingang für die Meßleitung 24 und vier Ausgänge
für Steuerleitungen. Die Steuerleitung 25 ist mit der Dosiervorrichtung 2, die Steuerleitung
26 mit der Rüttelrinne 7, die Steuerleitung 27 mit dem Luftstrahlinjektor-Ventil
10 und die Steuerleitung 28 mit dem Stellventil 19 in der Saugleitung 17 verbunden.
Der normale Betriebszustand der Regeleinheit 23 ist dadurch charakterisiert,
daß bei einer Abnahme des Meßsignals am Reflexionssensor 21, was einer Zunahme
der Belegung der Stempeloberfläche mit Schmiermittel entspricht, die Absaugleistung
an der Saugöffnung 16 dadurch erhöht wird, daß das Stellventil 19 über die Steuerleitung
28 weiter geöffnet und umgekehrt bei einer Zunahme des Reflexionssignals
(entsprechend einer Abnahme der Schmiermittelbelegung) zur Verminderung der Absaugleistung
stärker geschlossen wird. Eine geringe Schmierung (bei einer starken Absaugung)
führt also zu einem großen Meßwert, eine starke Schmierung (bei einer
schwachen Absaugung) zu einem kleinen Meßwert. Das Ventil 19 und damit die Absaugleistung
wird nun von der Regeleinheit 23 so nachgestellt, daß die Schmiermittelbelegung
der Preßwerkzeuge auf einem vorgegebenen Sollwert S0 gehalten wird,
bzw. die Abweichung von diesem Sollwert minimiert wird.The
Die Praxis hat aber gezeigt, daß es Fälle gibt, wo das Meßsignal erfahrungsgemäß
nach Unterschreitung eines bestimmten Grenzwerts S1 trotz Erhöhung der Absaugung
nicht ansteigt, sondern konstant bleibt oder sogar noch weiter abnimmt. In diesem Fall
hat sich Tablettiergut (Produkt) an der Stempeloberfläche abgesetzt und die Erhöhung
der Schmiermittelbelegung durch Verringerung der Absaugleistung reicht nicht mehr
aus, um das Ansetzen von Produkt zu verhindern. Dies bedeutet, daß die Nachstellung
der Absaugleistung nicht mehr zu dem gewünschten Erfolg führt, so daß die
Regelung blockiert ist und ausfällt. Das Problem läßt sich aber mit Hilfe einer zusätzlichen
Regelung (Tandem-Regelung) lösen, die in diesem Fall für eine höhere Beladung
des Injektorluftstroms mit dem Schmiermittel sorgt. Zu diesem Zweck wird
über die Steuerleitung 25 die Drehzahl des Dosierer-Motors 5 und damit auch die in
den Luftstrahlinjektor 9 eindosierte Schmiermittelmenge so weit erhöht, bis der Produktansatz
an den Stempeln verschwindet. Der Meßwert überschreitet dann wieder
den Grenzwert S1, so daß die Regelung in den normalen Regelbereich zurückgeführt
werden kann, in dem wieder die Absaugleistung als Stellgröße für die Schmiermittelbelegung
verwendet wird. Falls erforderlich, kann bei der erhöhten Eindosierung von
Schmiermittel die Schwingfrequenz der Rüttelrinne 7 (über die Steuerleitung 26) und
der Mengenstrom der Förderluft in den Luftstrahlinjektor 9 (über das Ventil 10 und
die Steuerleitung 27) von der Regeleinheit 23 nachgestellt werden.Practice has shown, however, that there are cases in which experience has shown that the measurement signal does not rise after falling below a certain limit value S 1 despite increasing the suction, but remains constant or even decreases further. In this case, tabletted material (product) has settled on the surface of the punch and increasing the lubricant occupancy by reducing the suction capacity is no longer sufficient to prevent the product from sticking. This means that the adjustment of the suction power no longer leads to the desired success, so that the control is blocked and fails. The problem can be solved with the help of an additional control (tandem control), which in this case ensures a higher loading of the injector air flow with the lubricant. For this purpose, the speed of the
Anstelle des optischen Reflexionssensors 21 kann auch ein Kraftsensor verwendet
werden, der die zum Austoßen der fertigen Tabletten aus der Matrize der Tablettenpresse
erforderliche Kraft (Ausstoßkraft) mißt. Solche Kraftsensoren sind bei den
meisten handelsüblichen Tablettenpressen bereits eingebaut. Dabei wird von dem
funktionalen Zusammenhang Gebrauch gemacht, daß die Ausstoßkraft mit
wachsender Schmiermittelbelegung abnimmt und mit abnehmender Schmiermittelbelegung
zunimmt. Analog zu der vorbeschrierbenen Regelung auf Basis des Reflexionssensors
wird die gemessene Ausstoßkraft mit einem vorgewählten Sollwert K0 verglichen
und die Absaugleistung so nachgestellt, daß die Abweichung von diesem Sollwert
wieder möglichst gering ist. Auch hier kann wiederum von der Option der Erhöhung
der Pulverbeladung im Förderluftstrom Gebrauch gemacht werden, wenn erfahrungsgemäß
nach Überschreitung eines Grenzwerts K1 für die Ausstoßkraft die
Veränderung der Absaugleistung im Falle von Produktansatz an den Stempeloberflächen
nicht mehr ausreicht, den ursprünglich eingestellten Sollwert K0 für die Ausstoßkraft
einzuregeln.Instead of the
Eine Variante der Erfindung besteht darin, daß nicht die Absaugung an den Preßstempeln als Stellgröße benutzt wird, um die Schmiermittelbelegung der Preßstempel-Oberflächen nachzuregeln, sondern von vornherein die Pulverbeladung des Injektorluftstroms. In diesem Fall wird die Absaugleistung konstant gehalten und nur die Dosierrate für die Eindosierung des Schmiermittels in den Injektorluftstrom und gegebenenfalls auch noch die Menge der Injektorluft derart nachgestellt, daß die Differenz zwischen dem mit dem Kraftsensor oder Reflexionssensor gemessenen Ist-wert der Schmiermittelbelegung und dem Sollwert Ko bzw. So auf Null gebracht (minimiert) wird. Diese Art der Regelung hat aber unter Umständen einen größeren Schmiermittelverbrauch zur Folge.A variant of the invention is that not the suction on the ram is used as a manipulated variable to determine the lubricant occupancy of the ram surfaces readjust, but from the outset the powder loading of the injector airflow. In this case the suction power is kept constant and only that Dosing rate for the dosing of the lubricant into the injector air flow and if necessary also adjusted the amount of injector air so that the difference between the actual value measured with the force sensor or reflection sensor Lubricant occupancy and the setpoint Ko or So brought to zero (minimized) becomes. However, this type of control may have a higher lubricant consumption result.
Claims (11)
- Device for spraying a pulverulent lubricant or release agent dispersed in an air stream onto the pressing tools in a tableting press,
comprising at least one spray nozzle (14) for applying the powder-containing air stream to the pressing tools,
a metering device (1, 2, 3, 4, 5, 6) having an air-jet injector for reproducibly loading the air stream with the lubricant,
a sensor (21) which is operatively connected to the pressing tools (15a, 15b) in the tableting press and which generates an output signal which is characteristic of the extent to which the lubricant is covering the surfaces of the pressing tools, characterized in that
the device comprises a suction system (16, 19, 20) for sucking the excess residues of lubricant off the pressing tools, and
the characteristic output signal controls the amount of air sucked off at the suction system (16, 19, 20). - Device according to Claim 1, characterized in that the characteristic output signal also controls the loading of the air stream with the powder.
- Device according to Claim 1 or 2, characterized in that the sensor comprises a force sensor which generates an output signal which is characteristic of the force required to eject the tablets from the pressing tools.
- Device according to Claim 1 or 2, characterized in that the sensor comprises an optical reflection sensor (21) for detecting the light reflected from the surface of the pressing tools.
- Device according to Claim 3 or 4, characterized in that the sensor (21) is connected to a control circuit (16, 17, 19, 23) which, in the event of a change in the sensor output signal, adjusts the suction power of the suction system (16, 19, 20) and thus the covering of the surfaces of the pressing tools with the lubricant so that the deviation of the sensor output signal from a predetermined desired value is minimized.
- Device according to Claim 5, characterized in that the force sensor, in the event of the output signal increasing up to a limit value K1, causes the suction system to reduce the suction power.
- Device according to Claim 5, characterized in that the reflection sensor (21), in the event of its output signal decreasing to a limit value S1, causes the suction system (16, 19, 20) to increase the suction power.
- Device according to Claim 6 or 7, characterized in that the output signal of the force sensor, in the event of the limit value K1 being exceeded, or the output signal of the reflection sensor (21), in the event that it falls below the limit value S1, causes the metering device (1, 2, 3, 4, 5, 6) to increase the metering of lubricant into the air stream, until the signal falls back below the limit value K1 or moves back above the limit value S1.
- Device according to Claims 1 to 8, characterized in that a control device which keeps the metering rate for loading of the air stream constant is additionally provided.
- Device according to Claims 1 to 9, characterized in that the spray nozzle (14) for applying the lubricant to the pressing tools (15a, 15b) is incorporated in the feed shoe of the tableting press together with a scraper (18) for the tablets and a suction device (16) for removing the excess lubricant.
- Device according to Claims 1 to 10, characterized in that the metering device comprises a vertically disposed reservoir (1), which is provided with agitator arms (4) and an agitator cage (3) and at its base has a discharge opening (6), and in that a vibrating conveyor (7) is arranged beneath the discharge opening (6) in order to convey the pulverulent lubricant trickling out of the reservoir (1) into the air-jet injector (9).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19647089A DE19647089A1 (en) | 1996-11-14 | 1996-11-14 | Device for the controlled spraying of powdered lubricants onto punches and dies of tablet presses |
| DE19647089 | 1996-11-14 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0842763A2 EP0842763A2 (en) | 1998-05-20 |
| EP0842763A3 EP0842763A3 (en) | 1998-07-22 |
| EP0842763B1 true EP0842763B1 (en) | 2004-05-26 |
Family
ID=7811670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97119143A Expired - Lifetime EP0842763B1 (en) | 1996-11-14 | 1997-11-03 | Apparatus for the controlled spraying of a lubricating product in powder form on punches and dies in tablet presses |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US6079968A (en) |
| EP (1) | EP0842763B1 (en) |
| AT (1) | ATE267692T1 (en) |
| CA (1) | CA2220476C (en) |
| DE (2) | DE19647089A1 (en) |
| DK (1) | DK0842763T3 (en) |
| ES (1) | ES2221007T3 (en) |
| PT (1) | PT842763E (en) |
Families Citing this family (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE29804955U1 (en) * | 1998-03-19 | 1998-12-24 | Quénéhervé, Marianne, 88521 Ertingen | Metering device for powdered piston lubricant |
| US6482349B1 (en) * | 1998-11-02 | 2002-11-19 | Sumitomo Special Metals Co., Ltd. | Powder pressing apparatus and powder pressing method |
| FR2790387B1 (en) * | 1999-03-01 | 2001-05-18 | Prographarm Laboratoires | ORODISPERSIBLE TABLET HAVING LOW FRIABILITY AND PROCESS FOR THE PREPARATION THEREOF |
| JP3415558B2 (en) * | 2000-04-11 | 2003-06-09 | 株式会社菊水製作所 | Rotary powder compression molding machine |
| US20040096495A1 (en) * | 2000-12-08 | 2004-05-20 | Yasushi Watanabe | Method and apparatus for producing tablets |
| CN1228185C (en) * | 2001-08-06 | 2005-11-23 | 株式会社菊水制作所 | Rotary powder compression molding machine |
| EP1464473A4 (en) * | 2001-12-19 | 2005-10-05 | Kikusui Seisakusyo Ltd | Rotary powder compression molding machine |
| WO2005110726A1 (en) * | 2004-05-18 | 2005-11-24 | Shionogi & Co., Ltd. | Rotary powder compression molding equipment |
| EP1600761B1 (en) * | 2004-05-27 | 2007-07-11 | Uhlmann VisioTec GmbH | Tabletting press with integrated NIR measurement device |
| WO2006060906A1 (en) * | 2004-12-06 | 2006-06-15 | Corporation Imfine Inc. | Apparatus and method for lubricating a wall surface of a die cavity |
| US7376631B2 (en) * | 2005-05-26 | 2008-05-20 | International Business Machines Corporation | Method, apparatus and computer program product for reporting energy consumption |
| DE102005037773B3 (en) * | 2005-08-10 | 2007-01-18 | Voss, Gunter M. | Solvent film application process for surface mold involves applying hollow-cone gas flow, applying medium, and applying hollow-cone gas flow at different gas pressure |
| DE102007043581B4 (en) * | 2007-09-13 | 2010-01-07 | Fette Gmbh | Optical monitoring device for rotary presses |
| DE102008002311B4 (en) | 2007-10-22 | 2012-06-06 | Korsch Ag | Apparatus and method for dusting upper and lower punches of a powder press with a lubricant and / or release agent and powder press |
| CN105383085A (en) * | 2015-12-13 | 2016-03-09 | 秦皇岛博赫科技开发有限公司 | Tablet press simulating multi-element medicine powder compression process |
| DE102016123279B4 (en) | 2016-12-01 | 2019-02-21 | Fette Compacting Gmbh | Method and system for feeding a lubricant or release agent to press tools of a tablet press |
| JP2019111565A (en) | 2017-12-25 | 2019-07-11 | 株式会社菊水製作所 | Control apparatus and control method |
| CN109591354A (en) * | 2018-12-26 | 2019-04-09 | 贵州大学 | A kind of compression machinery in pharmaceutical industries |
| CN109701783A (en) * | 2018-12-28 | 2019-05-03 | 唐山晶源电子有限公司 | Mirror surface magnetic core outer encapsulating spray equipment |
| CN114887792A (en) * | 2022-05-05 | 2022-08-12 | 青岛华仕达机器股份有限公司 | Pipe spraying wound form wiring arrangement for preparation steel |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4047866A (en) * | 1976-11-22 | 1977-09-13 | The Dow Chemical Company | Automatic self-lubricating rotary tablet press |
| DE2932069A1 (en) * | 1979-08-08 | 1981-03-26 | Dr. Karl Thomae Gmbh, 88400 Biberach | Treating moulding tools with lubricant droplets - generated e.g. in a piezoelectric oscillator, for use in pharmaceutical, food and catalyst prod. |
| ES485764A1 (en) * | 1978-11-15 | 1980-10-01 | Thomae Gmbh Dr K | Method and apparatus for dotting moulding devices by means of discrete droplets of a liquid or suspended lubricant during the manufacture of moulded objects in the pharmaceutical, food or catalytic field. |
| JPS5614098A (en) * | 1979-07-13 | 1981-02-10 | Takeda Chem Ind Ltd | Externally lubricating tablet making machine |
| DE3312634A1 (en) * | 1983-04-08 | 1984-10-11 | Dr. Karl Thomae Gmbh, 7950 Biberach | IMPROVED METHOD AND DEVICES FOR POINTING MOLDING TOOLS WITH DROPLETS OF LIQUID OR SUSPENDED LUBRICANTS IN THE PRODUCTION OF FORMS IN THE PHARMACEUTICAL, FOOD OR CATALYST AREA |
| DE3633646A1 (en) * | 1986-10-03 | 1988-04-14 | Thomae Gmbh Dr K | NEW METHOD FOR THE CONTROLLED RELEASE OF DOSED LUBRICANT AMOUNTS IN THE COATING OF PRESSING TOOLS WITH LUBRICANT FLUIDS AND SUSPENSIONS AND DEVICES FOR IMPLEMENTING THE METHOD |
| FR2621839B1 (en) * | 1987-10-14 | 1992-02-21 | Cegedur | METHOD FOR CONTROLLING AND ADJUSTING THE LUBRICATION OF THE WORKING FACE OF ROTARY CYLINDERS OF A CONTINUOUS BELT CASTING MACHINE |
| US5356577A (en) * | 1988-04-02 | 1994-10-18 | Dr. Karl Thomae Gmbh | Controlled release of metered quantities of finely divided solids with a venturi nozzle and regulated control |
| DE3811260A1 (en) * | 1988-04-02 | 1989-10-26 | Thomae Gmbh Dr K | TARGETED DELIVERY OF DOSED AMOUNTS OF FINE DISTRIBUTED SOLIDS WITH VENTURI NOZZLE AND CONTROLLED CONTROL |
| JPH01289598A (en) * | 1988-05-16 | 1989-11-21 | Japan Nuclear Fuel Co Ltd<Jnf> | Powder compacting machine |
| DE3902293A1 (en) * | 1989-01-26 | 1990-08-02 | Gunther M Voss | NEW METHOD FOR PRESS CHAMBER COATING BY LUBRICANT RING FORMING ON THE TABLET WALL OF TABLET PRESSES |
| JPH0810472Y2 (en) * | 1990-08-31 | 1996-03-29 | 塩野義製薬株式会社 | Rotary powder compression molding machine |
| DE4030539A1 (en) * | 1990-09-27 | 1992-04-16 | Dilthey Ulrich Prof Dr Ing | Time-controlled powder dosing appts. - useful for powder feed to plasma powder weld deposition torch |
| US5365577A (en) * | 1990-09-27 | 1994-11-15 | Radish Communications Systems, Inc. | Telecommunication display system |
| DE4203273A1 (en) * | 1991-02-05 | 1992-08-27 | Voss Gunter M | Coating surface with substance dispersed in evaporable liq. - with nozzle providing intermittent supply of liq. and continuous supply of gas, for lubrication of medical tablet prodn. equipment |
| DE4103413C1 (en) * | 1991-02-05 | 1992-11-12 | Gunter M. 8918 Diessen De Voss | |
| JP2681601B2 (en) * | 1993-11-01 | 1997-11-26 | 協和醗酵工業株式会社 | External lubrication type tablet press |
| DE4412117A1 (en) * | 1994-04-08 | 1995-10-12 | Fette Wilhelm Gmbh | Method and device for applying powdered lubricant or separating agent to the pressing tools in tabletting machines |
| DE19511272A1 (en) * | 1995-03-27 | 1996-10-02 | Acheson Ind Deutschland Zweign | Two-substance spray nozzle, in particular for a spray element of a spraying tool of a form spraying device, and nozzle exchange arrangement for two-substance spray nozzles |
-
1996
- 1996-11-14 DE DE19647089A patent/DE19647089A1/en not_active Withdrawn
-
1997
- 1997-11-03 AT AT97119143T patent/ATE267692T1/en not_active IP Right Cessation
- 1997-11-03 DK DK97119143T patent/DK0842763T3/en active
- 1997-11-03 EP EP97119143A patent/EP0842763B1/en not_active Expired - Lifetime
- 1997-11-03 ES ES97119143T patent/ES2221007T3/en not_active Expired - Lifetime
- 1997-11-03 DE DE59711664T patent/DE59711664D1/en not_active Expired - Lifetime
- 1997-11-03 PT PT97119143T patent/PT842763E/en unknown
- 1997-11-10 CA CA002220476A patent/CA2220476C/en not_active Expired - Fee Related
- 1997-11-12 US US08/968,783 patent/US6079968A/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| ES2221007T3 (en) | 2004-12-16 |
| PT842763E (en) | 2004-09-30 |
| EP0842763A3 (en) | 1998-07-22 |
| ATE267692T1 (en) | 2004-06-15 |
| DE59711664D1 (en) | 2004-07-01 |
| EP0842763A2 (en) | 1998-05-20 |
| CA2220476A1 (en) | 1998-05-14 |
| DE19647089A1 (en) | 1998-05-28 |
| DK0842763T3 (en) | 2004-08-16 |
| US6079968A (en) | 2000-06-27 |
| CA2220476C (en) | 2007-01-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0842763B1 (en) | Apparatus for the controlled spraying of a lubricating product in powder form on punches and dies in tablet presses | |
| EP0466857B2 (en) | Device and process for monitoring material flow, and use of the process | |
| EP3238832B2 (en) | Powder conveying device for conveying coating powder to a powder applicator, powder coating installation and method for operating the powder conveying device | |
| DE4121455A1 (en) | METHOD AND DEVICE FOR FEEDING POWDER COATING DEVICES WITH A POWDER-AIR MIXTURE | |
| DE3428977A1 (en) | COMPRESSED AIR POWDER DOSING DEVICE WITH IMPROVED POWDER FLOWING DEVICE | |
| DE2621410C2 (en) | ||
| DE3829623A1 (en) | FEEDING DEVICE FOR POCKET GOODS IN A MASS FLOW WEIGHING DEVICE | |
| EP0076790B1 (en) | Device for the dosed charging of a continuous-casting mould with casting flux | |
| DE69013562T2 (en) | Device for forming a continuous layer of granular and / or powdery material in a breading machine. | |
| DE2708032C3 (en) | Continuously operating powder feed device for feeding and discharging powder into or from the coating material bed of an electrostatic fluidized bed coating device | |
| EP0042557A2 (en) | Device for metering materials with a poor fluidity | |
| EP0878236A1 (en) | Method and apparatus for dissolving granular material in a fluid jet mill | |
| DE19937557C2 (en) | Device for producing a powder-air mixture | |
| EP3685924A1 (en) | Powder feeding device for coating powder and powder coating installation with a powder feeding device | |
| EP1433539B1 (en) | Receptacle for powder form substances | |
| EP2105207B1 (en) | Receptable for powder-form substances, conveyer system for powder-form substances and method for operating the same | |
| EP0222695A1 (en) | Dosing device | |
| EP1433538B1 (en) | Receptacle for powder form substances | |
| DE956350C (en) | Trough mixer for the continuous mixing of wood chips or other chip-shaped materials | |
| EP0112937A1 (en) | Arrangement for the transportation of in particular hardly flowing discrete material | |
| DE19736448B4 (en) | Apparatus and method for supplying powder | |
| EP0898154B1 (en) | Method of determining the quantity of liquid in granulate, as well as a method of dosing a granulate using a correction for the quantity of liquid | |
| WO2014095349A1 (en) | Device for conveying a fuel | |
| DE19752532C2 (en) | Device for discharging a powdery or granular substance | |
| DE1507887A1 (en) | Method and device for producing a certain mixing ratio of different components |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
| AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
| AX | Request for extension of the european patent |
Free format text: AL;LT;LV;MK;RO;SI |
|
| 17P | Request for examination filed |
Effective date: 19990122 |
|
| AKX | Designation fees paid |
Free format text: AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
| RBV | Designated contracting states (corrected) |
Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
| 17Q | First examination report despatched |
Effective date: 20021010 |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
| RAP1 | Party data changed (applicant data changed or rights of an application transferred) |
Owner name: BAYER HEALTHCARE AG |
|
| GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
| GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
| AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AT BE CH DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE |
|
| REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D Free format text: NOT ENGLISH |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: NV Representative=s name: E. BLUM & CO. PATENTANWAELTE |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D Free format text: GERMAN |
|
| REF | Corresponds to: |
Ref document number: 59711664 Country of ref document: DE Date of ref document: 20040701 Kind code of ref document: P |
|
| REG | Reference to a national code |
Ref country code: SE Ref legal event code: TRGR |
|
| GBT | Gb: translation of ep patent filed (gb section 77(6)(a)/1977) |
Effective date: 20040628 |
|
| REG | Reference to a national code |
Ref country code: DK Ref legal event code: T3 |
|
| REG | Reference to a national code |
Ref country code: PT Ref legal event code: SC4A Free format text: AVAILABILITY OF NATIONAL TRANSLATION Effective date: 20040810 |
|
| REG | Reference to a national code |
Ref country code: GR Ref legal event code: EP Ref document number: 20040402866 Country of ref document: GR |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FG2A Ref document number: 2221007 Country of ref document: ES Kind code of ref document: T3 |
|
| ET | Fr: translation filed | ||
| PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
| 26N | No opposition filed |
Effective date: 20050301 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: LU Payment date: 20070522 Year of fee payment: 11 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PFA Owner name: BAYER HEALTHCARE AG Free format text: BAYER HEALTHCARE AG# #51368 LEVERKUSEN (DE) -TRANSFER TO- BAYER HEALTHCARE AG# #51368 LEVERKUSEN (DE) |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: NL Payment date: 20071104 Year of fee payment: 11 Ref country code: MC Payment date: 20071026 Year of fee payment: 11 Ref country code: ES Payment date: 20071219 Year of fee payment: 11 Ref country code: DK Payment date: 20071115 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FI Payment date: 20071114 Year of fee payment: 11 Ref country code: AT Payment date: 20071113 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: SE Payment date: 20071106 Year of fee payment: 11 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: PT Payment date: 20071023 Year of fee payment: 11 Ref country code: GR Payment date: 20071030 Year of fee payment: 11 |
|
| REG | Reference to a national code |
Ref country code: PT Ref legal event code: MM4A Free format text: LAPSE DUE TO NON-PAYMENT OF FEES Effective date: 20090504 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20081130 |
|
| REG | Reference to a national code |
Ref country code: DK Ref legal event code: EBP |
|
| EUG | Se: european patent has lapsed | ||
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090601 Ref country code: FI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20081103 |
|
| NLV4 | Nl: lapsed or anulled due to non-payment of the annual fee |
Effective date: 20090601 |
|
| REG | Reference to a national code |
Ref country code: IE Ref legal event code: MM4A |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: PT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090504 Ref country code: AT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20081103 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: IE Payment date: 20071113 Year of fee payment: 11 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20081103 Ref country code: DK Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20081130 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090603 |
|
| REG | Reference to a national code |
Ref country code: ES Ref legal event code: FD2A Effective date: 20081104 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: ES Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20081104 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20081103 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20081104 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: GB Payment date: 20101123 Year of fee payment: 14 Ref country code: IT Payment date: 20101124 Year of fee payment: 14 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: CH Payment date: 20111124 Year of fee payment: 15 Ref country code: FR Payment date: 20111125 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: BE Payment date: 20111122 Year of fee payment: 15 |
|
| PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20120112 Year of fee payment: 15 |
|
| BERE | Be: lapsed |
Owner name: *BAYER HEALTHCARE A.G. Effective date: 20121130 |
|
| REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
| GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20121103 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20121130 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20121130 |
|
| REG | Reference to a national code |
Ref country code: FR Ref legal event code: ST Effective date: 20130731 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20121130 Ref country code: IT Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20121103 |
|
| REG | Reference to a national code |
Ref country code: DE Ref legal event code: R119 Ref document number: 59711664 Country of ref document: DE Effective date: 20130601 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20130601 |
|
| PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20121103 Ref country code: FR Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20121130 |