EP0336198A2 - Devices for controlling the delivery of dosed quantities of sprayed liquids contained in a gas - Google Patents
Devices for controlling the delivery of dosed quantities of sprayed liquids contained in a gas Download PDFInfo
- Publication number
- EP0336198A2 EP0336198A2 EP89104988A EP89104988A EP0336198A2 EP 0336198 A2 EP0336198 A2 EP 0336198A2 EP 89104988 A EP89104988 A EP 89104988A EP 89104988 A EP89104988 A EP 89104988A EP 0336198 A2 EP0336198 A2 EP 0336198A2
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- European Patent Office
- Prior art keywords
- valve
- nozzle
- axis
- calming
- venturi
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Classifications
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- 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
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- 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
- B05B12/02—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery
- B05B12/06—Arrangements for controlling delivery; Arrangements for controlling the spray area for controlling time, or sequence, of delivery for effecting pulsating flow
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- 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
- B05B12/12—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 conditions of ambient medium or target, e.g. humidity, temperature position or movement of the target relative to the spray apparatus
Definitions
- the invention relates to devices for the controlled release of metered amounts of liquids which are finely divided in gases, including emulsions or suspensions, for the purpose of applying these liquids to solid carrier materials which are guided past these devices at defined intervals for the purpose of targeted application or coating will.
- liquid lubricant or release agent preparations can be applied to the claimed surfaces of pressing tools in tabletting machines, but also active pharmaceutical ingredients on pharmaceutical carriers or dye solutions or sugar preparations on luxury foods, such as chocolates.
- the devices according to the invention also allow a relatively large-volume application of liquids to moving carrier materials, the metered and targeted release being maintained.
- the device according to the invention consists of a combination of nozzles, optionally with a calming tube located at the outlet of the nozzles, for generating and specifically guiding a pulsed liquid-gas mixture with a defined outflow rate in synchronism with the number of cycles with which the object to be charged is guided past the outlet opening.
- the nozzle combination consists of one or more venturi nozzles, the individual venturi nozzle consisting of an air nozzle, a mixing chamber adjoining this and a mixture nozzle connected to it.
- a valve on the propellant line supplying the Venturi nozzle which valve is actuated mechanically, pneumatically, hydraulically or electrically by a control system; the control system receives its signals from a sensor which responds to the appearance of solid support materials to be acted upon in front of the nozzle openings, e.g. B. by mechanical, optical or electromagnetic triggering; gases such as air, nitrogen and noble gases serve as blowing agents.
- the control device opens the valve or valves at short notice and in a timely manner, the now flowing means of transport in the venturi nozzle taking a defined amount of the liquid with it by suction, producing a liquid-gas mixture from it and accelerating it, the quantified mixture is brought specifically to the areas to be acted on.
- An intake duct with a non-return valve that supplies the Venturi nozzle with appropriate liquids takes the liquid from a storage container.
- the targeted application of the mixture takes place through the synchronization of the pulses and through the geometry of the nozzle openings, which, for. B. can be slit-shaped or oval.
- a preferred embodiment consists of Venturi nozzles, which are composed of one or more air nozzles, a mixing chamber and one or more mixture nozzles in connection with a rotary slide valve.
- the rotary slide valve is located on the inlet side of the Venturi nozzle and interacts functionally with the nozzle.
- the rotary slide valve which bears against an axis and is caused to rotate by it in a controlled manner, serves as a compressed air valve for the venturi nozzle or nozzles, which is or are arranged in a stationary manner directly behind the rotary slide valve.
- the negative pressure generated by the Venturi nozzle sucks in the liquid, while the jet of transport, e.g. B. air jet, the Venturi nozzle detects the liquid jet and accelerates the resulting liquid-gas mixture to an outlet opening.
- a calming zone or a calming tube behind the Venturi nozzle.
- a deflection or deflection device can also be fitted in this calming tube, which deflects the generated, pulsed beam in the direction of the objects to be acted upon.
- a punctiform or line-shaped coating or loading of the objects can be achieved if the outlet opening is round.
- a square or rectangular action on corresponding surfaces of the passing object can be achieved if the outlet opening is slit-shaped.
- a drum serving as a template is attached to the end of the calming tube and runs synchronously with the rotary valve.
- So z. B. act differently on the upper and lower punches of a tableting machine or so different figures such as circles, stars, letters, on supports, e.g. B. Place chocolates.
- the modulation of the emerging beam is also possible using other valve types if the template is synchronized with the frequency of the stamp.
- the compressed air for the Venturi nozzle is fed via a microdosing valve depending on the frequency and the speed at which the objects are guided past the nozzle opening.
- the rotary valve takes over this task; for this purpose, the number of revolutions of the axis on which the rotary slide sits is linked to the frequency and speed at which the objects are guided past the nozzle opening.
- the nozzle combination comprises an injection nozzle valve which is controlled by a pulsating metering pump in synchronism with the required number of cycles.
- the injector valve mainly consists of the valve seat, an associated piston with an adjusting spring and a leakage connection.
- a calming pipe connects to the outlet opening of the injection nozzle valve and has air inlet openings in the area immediately after the outlet opening of the valve, which are arranged there axially to the outlet opening of the valve. At the other end of the calming tube are the real ones Outlet openings attached.
- deflection devices can also be accommodated, which can be carried by an axis so that they rotate with this axis, or which sit rigidly at the end of the calming tube.
- the metered, pulsed material is deflected by these devices and shot down towards the objects through openings in the lateral surface of the calming tube.
- a template in front of the openings in the lateral surface or, alternatively, for these openings can provide a modulated application of the material to the carriers to be loaded.
- a pulsating metering pump designed as a piston pump can be controlled, for example, via a camshaft, the cams of which run synchronously with the number of cycles of the objects sliding past. With this control, it drives under pressure a certain amount of liquid, which is supplied to it from a storage tank, into the space between the piston and nozzle of the injector valve, the piston being pressed against the adjusting spring and thus clearing the way via the valve cone in the direction of the calming tube . As soon as the liquid metering pump blocks the path to the injector valve again, ie a certain amount of liquid has escaped through the opening of the valve, the cone is pressed against its seat again by the restoring force of the spring.
- a drive unit e.g.
- FIGS. 1 to 3 which in exemplary form represent a schematic cross section through the devices according to the invention.
- FIGS 1 and 2 show a Venturi nozzle (1), consisting of one or more air nozzles A in connection with one or more mixing chambers B and one or more mixture nozzles C, one or more suction channels (2) connected to the Venturi nozzles, via a suction line, in which a check valve (7) is located, end in a storage container (6), a propellant line (3) connecting a valve (4) with a venturi nozzle (1), a compressed gas connection (5) , a sensor (9) for generating signals in connection with a controller (10) which actuates the valve (4).
- a Venturi nozzle (1) consisting of one or more air nozzles A in connection with one or more mixing chambers B and one or more mixture nozzles C, one or more suction channels (2) connected to the Venturi nozzles, via a suction line, in which a check valve (7) is located, end in a storage container (6), a propellant line (3) connecting a valve (4) with a venturi nozzle (1), a compressed gas connection
- the venturi nozzle (1) which in turn consists of one or more air nozzles A, one or more mixing chambers B and one or more mixture nozzles C, has a rotary slide valve (11) on its inlet side, which is connected to an axis (12 ) is fixed, the axis (12) being driven by a motor M synchronously as a function of the number of nozzle openings (13) to the required speed; as an advantageous embodiment, a calming pipe (14) adjoins the mixture nozzle or nozzles C, at the end of which the metered material emerges through a slot-shaped opening (15).
- the opening (15) can be made in the extension of the axis (12), but it can also be a deflection device (16) on the axis (12) or on sit on its own axis in the extension of the axis (12) or rigidly at the end of the calming tube (14), which deflects the metered material at right angles.
- a template (17) can be attached in front of the outlet opening, which ensures a geometrically modulated application of the material to the zones to be loaded.
- the template (17) itself can form the outlet opening (15) at the end of the calming tube (14), thus representing an extension of the latter; the template (17) can also be arranged rotatably, its drive again being regulated by the controller (10) and being synchronous with the number of cycles.
- FIG. 3 shows a cross section through a nozzle combination with an injection nozzle valve.
- An injector valve (8) is controlled by a pulsating metering pump (18) in synchronism with the required number of cycles.
- the injector valve (8) consists of a valve seat (19), piston (20), adjusting spring (21) and leakage connection (22). Interrupted by air access openings (23), which are arranged in a circle, a settling pipe (14) sits on the valve opening. At the end of the calming tube, slots (15) are provided as outlet openings.
- a deflection device (16) on the axis (12) ensures the deflection of the material, which if necessary passes a template (17) before it hits the intended zones.
- the template (17) ensures a modulated application of the goods to the zones to be loaded.
- An engine M drives a camshaft (24) with cams (25) z.
- B. a piston pump (18). From a storage container (6), secured by a check valve (7), the liquid is fed to the injection nozzle valve by means of the piston pump (18).
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- Mechanical Engineering (AREA)
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- Coating Apparatus (AREA)
- Confectionery (AREA)
Abstract
Description
Die Erfindung betrifft Vorrichtungen zur gesteuerten Freisetzung dosierter Mengen von in Gasen feinverteilten Flüssigkeiten, worunter auch Emulsionen oder Suspensionen zu verstehen sind, zum Zwecke der Aufbringung dieser Flüssigkeiten auf feste Trägermaterialien, die zur Vornahme einer gezielten Beaufschlagung oder Beschichtung in zeitlich definierten Abständen an diesen Vorrichtungen vorbeigeführt werden. Erfindungsgemäß lassen sich auf diese Weise zum Beispiel flüssige Schmiermittel- oder Trennmittelzubereitungen auf die beanspruchten Flächen von Preßwerkzeugen in Tablettiermaschinen, aber auch pharmazeutische Wirkstoffe auf Arzneimittelträger oder Farbstofflösungen oder Zuckerzubereitungen auf Genußmittel, wie Pralinen, auftragen.The invention relates to devices for the controlled release of metered amounts of liquids which are finely divided in gases, including emulsions or suspensions, for the purpose of applying these liquids to solid carrier materials which are guided past these devices at defined intervals for the purpose of targeted application or coating will. In this way, according to the invention, for example, liquid lubricant or release agent preparations can be applied to the claimed surfaces of pressing tools in tabletting machines, but also active pharmaceutical ingredients on pharmaceutical carriers or dye solutions or sugar preparations on luxury foods, such as chocolates.
Im Gegensatz zu den in der US-PS 4.323.530 beschriebenen Vorrichtungen zur Verpreßung von Granulaten zu Tabletten, Dragéekernen und dergleichen gestattet die erfindungsgemäße Vorrichtungen auch ein verhältnismäßig großvolumiges Aufbringen von Flüssigkeiten auf sich bewegende Trägermaterialen, wobei die dosierte und gezielte Freisetzung gewahrt bleibt.In contrast to the devices for compressing granules into tablets, dragee cores and the like described in US Pat. No. 4,323,530, the devices according to the invention also allow a relatively large-volume application of liquids to moving carrier materials, the metered and targeted release being maintained.
Die erfindungsgemäße Vorrichtung besteht aus einer Düsenkombination, gegebenenfalls mit einem am Ausgang der Düsen anliegenden Beruhigungsrohr, zur Erzeugung und gezielten Führung eines synchron zur Taktzahl, mit der der zu beaufschlagende Gegenstand vor der Austrittsöffnung vorbeigeführt wird, gepulsten Flüssigkeit-Gas-Gemisches mit definierter Ausströmgeschwindigkeit.The device according to the invention consists of a combination of nozzles, optionally with a calming tube located at the outlet of the nozzles, for generating and specifically guiding a pulsed liquid-gas mixture with a defined outflow rate in synchronism with the number of cycles with which the object to be charged is guided past the outlet opening.
So besteht bei einer Ausführungsform der erfindungsgemäßen Vorrichtung die Düsenkombination aus einer oder mehreren Venturi-Düsen, wobei die einzelne Venturi-Düse sich aus einer Luftdüse, einer sich an diese anschließende Mischkammer und einer damit verbundenen Gemischdüse besteht. An der die Venturi-Düse versorgenden Treibmittelleitung liegt ein Ventil an, welches von einer Steuerung mechanisch, pneumatisch, hydraulisch oder elektrisch betätigt wird; die Steuerung erhält ihre Signale von einem Sensor, der auf das Erscheinen von zu beaufschlagenden festen Trägermaterialen vor den Düsenöffnungen anspricht, z. B. durch mechanische, optische oder elektromagnetische Auslösung; als Treibmittel dienen Gase, wie Luft, Stickstoff, Edelgase. Beim Herannahen der Trägermaterialien öffnet die Steuerrungsvorrichtung kurzfristig und zeitgerecht das oder die Ventile, wobei das jetzt durchströmende Transportmittel in der Venturi-Düse eine definierte Menge der Flüssigkeit durch Sog mitnimmt, hieraus ein Flüssigkeit-Gas-Gemisch erzeugt und dieses beschleunigt, wobei das quantifizierte Gemisch gezielt auf die zu beaufschlagenden Flächen gebracht wird. Ein die Venturi-Düse mit entsprechenden Flüssigkeiten versorgender Ansaugkanal mit Rückschlagventil entnimmt die Flüssigkeit einem Vorratsbehälter. Das gezielte Aufbringen des Gemisches erfolgt durch die Synchronisation der Impulse und durch die Geometrie der Düsenöffnungen, die z. B. schlitzförmig oder oval sein kann.Thus, in one embodiment of the device according to the invention, the nozzle combination consists of one or more venturi nozzles, the individual venturi nozzle consisting of an air nozzle, a mixing chamber adjoining this and a mixture nozzle connected to it. There is a valve on the propellant line supplying the Venturi nozzle, which valve is actuated mechanically, pneumatically, hydraulically or electrically by a control system; the control system receives its signals from a sensor which responds to the appearance of solid support materials to be acted upon in front of the nozzle openings, e.g. B. by mechanical, optical or electromagnetic triggering; gases such as air, nitrogen and noble gases serve as blowing agents. When the carrier materials approach, the control device opens the valve or valves at short notice and in a timely manner, the now flowing means of transport in the venturi nozzle taking a defined amount of the liquid with it by suction, producing a liquid-gas mixture from it and accelerating it, the quantified mixture is brought specifically to the areas to be acted on. An intake duct with a non-return valve that supplies the Venturi nozzle with appropriate liquids takes the liquid from a storage container. The targeted application of the mixture takes place through the synchronization of the pulses and through the geometry of the nozzle openings, which, for. B. can be slit-shaped or oval.
Eine vorzugsweise Ausführungsform besteht aus Venturi-Düsen, die sich aus einer oder mehreren Luftdüsen, einer Mischkammer und einer oder mehreren Gemischdüsen in Verbindung mit einem Drehschieberventil zusammensetzen. Das Drehschieberventil liegt der Eingangsseite der Venturi-Düse an und wirkt mit der Düse funktionell zusammen. Der Drehschieber, der an einer Achse anliegt und durch diese in geregelter Weise zur Rotation gebracht wird, dient als ein Druckluftventil für die Venturi-Düse bzw. -Düsen, die direkt hinter dem Drehschieberventil stationär angeordnet ist oder sind. Der durch die Venturi-Düse erzeugte Unterdruck saugt die Flüssigkeit an, während der Transportmittelstrahl, z. B. Luftstrahl, der Venturi-Düse den Flüssigkeitsstrahl erfaßt und das dabei resultierende Flüssigkeit-Gas-Gemisch zu einer Auslaßöffnung beschleunigt.A preferred embodiment consists of Venturi nozzles, which are composed of one or more air nozzles, a mixing chamber and one or more mixture nozzles in connection with a rotary slide valve. The rotary slide valve is located on the inlet side of the Venturi nozzle and interacts functionally with the nozzle. The rotary slide valve, which bears against an axis and is caused to rotate by it in a controlled manner, serves as a compressed air valve for the venturi nozzle or nozzles, which is or are arranged in a stationary manner directly behind the rotary slide valve. The negative pressure generated by the Venturi nozzle sucks in the liquid, while the jet of transport, e.g. B. air jet, the Venturi nozzle detects the liquid jet and accelerates the resulting liquid-gas mixture to an outlet opening.
Um eine straffe Bündelung bzw. eine gleichförmige Geschwindigkeitsverteilung des die Venturi-Düse verlassenden Strahls zu erreichen und um vagabundierende Mediumteilchen vor den zu beaufschlagenden festen Trägermaterialien zu vermeiden, empfiehlt es sich, der Venturi-Düse eine Beruhigungszone bzw. ein Beruhigungsrohr nachzuordnen. In diesem Beruhigungsrohr läßt sich gewünschtenfalls auch eine Ablenk- bzw. Umlenkvorrichtung anbringen, die den erzeugten, gepulsten Strahl in Richtung der zu beaufschlagenden Objekte ablenkt.In order to achieve tight bundling or a uniform velocity distribution of the jet leaving the Venturi nozzle and to avoid stray medium particles in front of the solid carrier materials to be acted upon, it is advisable to arrange a calming zone or a calming tube behind the Venturi nozzle. If desired, a deflection or deflection device can also be fitted in this calming tube, which deflects the generated, pulsed beam in the direction of the objects to be acted upon.
Eine punkt- oder strichförmige Beschichtung bzw. Beaufschlagung der Objekte ist zu erreichen, wenn die Auslaßöffnung rund ist. Eine viereckige oder rechteckige Beaufschlagung entsprechender Flächen des vorbeigleitenden Objektes läßt sich erreichen, wenn die Auslaßöffnung spaltförmig ist.A punctiform or line-shaped coating or loading of the objects can be achieved if the outlet opening is round. A square or rectangular action on corresponding surfaces of the passing object can be achieved if the outlet opening is slit-shaped.
Im Falle der Verwendung eines Drehschieberventils kann man auch andere Formen der Beaufschlagung, auch unterschiedlich in verschiedenen Richtungen, erzielen, wenn auf der Innenwelle des Drehschieberventils vor dem Auslaßspalt, gegebe nenfalls am Ende des Beruhigungsrohres, eine als Schablone dienende Trommel befestigt ist, die synchron mit dem Drehschieber läuft. So lassen sich z. B. die Ober- und Unterstempel einer Tablettiermaschine unterschiedlich beaufschlagen oder es lassen sich so verschiedene Figuren wie Kreise, Sterne, Buchstaben, auf Trägern, z. B. Pralinen, anbringen. Am vorteilhaftesten ist das Anbringen einer Schablone unmittelbar vor der oder den Austrittsöffnungen der Beruhigungszone, um den freigesetzten, gepulsten Strahl zu modulieren. Selbstverständlich ist die Modulation des austretenden Strahles auch unter Verwendung von anderen Ventiltypen möglich, wenn die Schablone mit der Frequenz der Stempel synchronisiert wird.In the case of the use of a rotary slide valve, other forms of loading, also different in different directions, can be achieved if given on the inner shaft of the rotary slide valve in front of the outlet gap If necessary, a drum serving as a template is attached to the end of the calming tube and runs synchronously with the rotary valve. So z. B. act differently on the upper and lower punches of a tableting machine or so different figures such as circles, stars, letters, on supports, e.g. B. Place chocolates. It is most advantageous to attach a template directly in front of the exit opening or openings of the calming zone in order to modulate the released, pulsed beam. Of course, the modulation of the emerging beam is also possible using other valve types if the template is synchronized with the frequency of the stamp.
Im allgemeinen wird die Druckluft für die Venturi-Düse über ein Mikrodosierventil in Abhängigkeit von der Frequenz und der Geschwindigkeit mit der die Objekte an der Düsenöffnung vorbeigeführt werden, also z. B. der Tablettenpresse, zugeführt. Im Falle des Drehschieberventils übernimmt der Drehschieber diese Aufgabe; zu diesem Zweck ist die Umdrehungszahl der Achse, auf der der Drehschieber sitzt, an die Frequenz und Geschwindigkeit, mit der die Objekte an der Düsenöffnung vorbeigeführt werden, gekoppelt.In general, the compressed air for the Venturi nozzle is fed via a microdosing valve depending on the frequency and the speed at which the objects are guided past the nozzle opening. B. the tablet press. In the case of the rotary valve, the rotary valve takes over this task; for this purpose, the number of revolutions of the axis on which the rotary slide sits is linked to the frequency and speed at which the objects are guided past the nozzle opening.
Eine weitere vorteilhafte Ausführungsform des Gegenstands der Erfindung ist dadurch gegeben, daß die Düsenkombination ein Einspritzdüsenventil umfaßt, welches von einer pulsierenden Dosierpumpe synchron zur geforderten Taktzahl angesteuert wird. Das Einspritzdüsenventil besteht hauptsächlich aus dem Ventilsitz, einem damit verbundenen Kolben mit einer Einstellfeder und einem Leckanschluß. An die Austrittsöffnung des Einspritzdüsenventils schließt sich ein Beruhigungsrohr an, welches im Bereich unmittelbar nach der Austrittsöffnung des Ventils Luftzutrittsöffnungen besitzt, die dort axial zur Austrittsöffnung des Ventils angeordnet sind. Am anderen Ende des Beruhigungsrohres sind die eigentlichen Austrittsöffnungen angebracht. In diesem Bereich können aber auch Ablenkvorrichtungen untergebracht sein, die von einer Achse getragen sein können, so daß sie mit dieser Achse rotieren, oder die starr am Ende des Beruhigungsrohres ansitzen. Das dosierte, gepulste Gut wird durch diese Vorrichtungen umgelenkt und durch Öffnungen in der Mantelfläche des Beruhigungsrohres in Richtung auf die Objekte abgeschossen. Auch hier kann eine Schablone vor den Öffnungen in der Mantelfläche oder ersatzweise für diese Öffnungen für ein moduliertes Auftragen des Gutes auf die zu beaufschlagenden Träger sorgen.A further advantageous embodiment of the object of the invention is given in that the nozzle combination comprises an injection nozzle valve which is controlled by a pulsating metering pump in synchronism with the required number of cycles. The injector valve mainly consists of the valve seat, an associated piston with an adjusting spring and a leakage connection. A calming pipe connects to the outlet opening of the injection nozzle valve and has air inlet openings in the area immediately after the outlet opening of the valve, which are arranged there axially to the outlet opening of the valve. At the other end of the calming tube are the real ones Outlet openings attached. In this area, however, deflection devices can also be accommodated, which can be carried by an axis so that they rotate with this axis, or which sit rigidly at the end of the calming tube. The metered, pulsed material is deflected by these devices and shot down towards the objects through openings in the lateral surface of the calming tube. Here, too, a template in front of the openings in the lateral surface or, alternatively, for these openings can provide a modulated application of the material to the carriers to be loaded.
Eine als Kolbenpumpe ausgebildete pulsierende Dosierpumpe kann beipielsweise über eine Nockenwelle, deren Nocken synchron zur Taktzahl der vorbeigleitenden Objekte laufen, gesteuert werden. Bei dieser Ansteuerung treibt sie unter Druck eine bestimmte Flüssigkeitsmenge, die ihr von einem Vorratstank zugeführt wird, in den Raum zwischen Kolben und Düse des Einspritzdüsenventils, wobei der Kolben gegen die Einstellfeder gedrückt und damit der Weg über den Ventilkegel in Richtung auf das Beruhigungsrohr freigegeben ist. Sobald die Dosierpumpe der Flüssigkeit den Weg zu dem Einspritzdüsenventil wieder versperrt, also eine bestimmte Menge Flüssigkeit durch die Öffnung des Ventils entwichen ist, wird der Kegel wieder durch die Rückstellkraft der Feder an seinen Sitz gepreßt. Ein Antriebsaggregat (z. B. Elektromotor) treibt die Achse der Dosierpumpe an, das Antriebsaggregat wird über einen Regler gesteuert, der seine Impulse synchron zur Taktzahl der vorgeführten Objekte über einen Sensor erhält. Es sind natürlich auch alle andere einschlägig vorbekannte Kraft- und Impuls-Übertragungssysteme möglich, sofern sie denselben Zwecken dienen. Zur Vermeidung von unerwünschtem Rücklauf ist zwischen Dosierpumpe und Vorratsbehälter ein Rückschlagventil anzubringen.A pulsating metering pump designed as a piston pump can be controlled, for example, via a camshaft, the cams of which run synchronously with the number of cycles of the objects sliding past. With this control, it drives under pressure a certain amount of liquid, which is supplied to it from a storage tank, into the space between the piston and nozzle of the injector valve, the piston being pressed against the adjusting spring and thus clearing the way via the valve cone in the direction of the calming tube . As soon as the liquid metering pump blocks the path to the injector valve again, ie a certain amount of liquid has escaped through the opening of the valve, the cone is pressed against its seat again by the restoring force of the spring. A drive unit (e.g. electric motor) drives the axis of the metering pump, the drive unit is controlled by a controller, which receives its pulses in sync with the number of cycles of the objects presented via a sensor. Of course, all other previously known force and pulse transmission systems are also possible, provided that they serve the same purposes. A check valve must be installed between the metering pump and the storage container to avoid undesired return.
Mit den vorbeschriebenen Düsenkombinationen ist es möglich, Flüssigkeitsmengen von 0,001 bis 0,2 ml pro Takt auf die zu beaufschlagende Flächen abzugeben; es ist auch möglich beim Einsatz in Tablettiermaschinen, bis zu 200 000 Preßlinge in einer Stunde herzustellen.With the nozzle combinations described above, it is possible to dispense liquid quantities of 0.001 to 0.2 ml per cycle onto the surfaces to be charged; When used in tableting machines, it is also possible to produce up to 200,000 compacts in one hour.
Zur näheren Erläuterung des Gegenstands der Erfindung sei auf die Figuren 1 bis 3 verwiesen, die in beispielhafter Form einen schematischen Querschnitt durch die erfindungsgemäßen Vorrichtungen darstellen.For a more detailed explanation of the subject matter of the invention, reference is made to FIGS. 1 to 3, which in exemplary form represent a schematic cross section through the devices according to the invention.
Die Figuren 1 und 2 zeigen eine Venturi-Düse (1), bestehend aus einer oder mehreren Luftdüsen A in Verbindung mit einer oder mehreren Mischkammern B und einer oder mehreren Gemischdüsen C, einem oder mehreren an die Venturi-Düsen anschließende Ansaugkanäle (2), die über eine Saugleitung, in der sich ein Rückschlagventil (7) befindet, in einem Vorratsbehälter (6) enden, einer Treibmittelleitung (3), die ein Ventil (4) mit einer Venturi-Düse (1) verbindet, einem Druckgasanschluß (5), einem Sensor (9) zur Erzeugung von Signalen in Verbindung mit einer Steuerung (10), welche das Ventil (4) betätigt.Figures 1 and 2 show a Venturi nozzle (1), consisting of one or more air nozzles A in connection with one or more mixing chambers B and one or more mixture nozzles C, one or more suction channels (2) connected to the Venturi nozzles, via a suction line, in which a check valve (7) is located, end in a storage container (6), a propellant line (3) connecting a valve (4) with a venturi nozzle (1), a compressed gas connection (5) , a sensor (9) for generating signals in connection with a controller (10) which actuates the valve (4).
In der Figur 2 besitzt die Venturi-Düse (1), die wiederum aus einer oder mehreren Luftdüsen A, einer oder mehreren Mischkammern B und einer oder mehreren Gemischdüsen C besteht, an ihrer Eingangsseite ein Drehschieberventil (11), das an einer Achse (12) befestigt ist, wobei die Achse (12) durch einen Motor M synchron in Abhängigkeit von der Anzahl der Düsenöffnungen (13) zu der geforderten Drehzahl angetrieben wird; als vorteilhafte Ausführungsform schließt sich an die Gemischdüse bzw. -düsen C ein Beruhigungsrohr (14) bündig an, an dessen Ende durch eine schlitzförmige Öffnung (15) das dosierte Gut austritt. Die Öffnung (15) kann in der Verlängerung der Achse (12) angebracht sein, es kann aber auch eine Ablenkvorrichtung (16) auf der Achse (12) oder auf einer eigenen Achse in Verlängerung der Achse (12) oder auch starr am Ende des Beruhigungsrohres (14) ansitzen, welche das dosierte Gut rechtwinklig ablenkt. Zusätzlich kann eine Schablone (17) vor der Austrittsöffnung angebracht sein, die für ein geometrisch moduliertes Auftragen des Gutes auf die zu beaufschlagenden Zonen sorgt.In FIG. 2, the venturi nozzle (1), which in turn consists of one or more air nozzles A, one or more mixing chambers B and one or more mixture nozzles C, has a rotary slide valve (11) on its inlet side, which is connected to an axis (12 ) is fixed, the axis (12) being driven by a motor M synchronously as a function of the number of nozzle openings (13) to the required speed; as an advantageous embodiment, a calming pipe (14) adjoins the mixture nozzle or nozzles C, at the end of which the metered material emerges through a slot-shaped opening (15). The opening (15) can be made in the extension of the axis (12), but it can also be a deflection device (16) on the axis (12) or on sit on its own axis in the extension of the axis (12) or rigidly at the end of the calming tube (14), which deflects the metered material at right angles. In addition, a template (17) can be attached in front of the outlet opening, which ensures a geometrically modulated application of the material to the zones to be loaded.
Bei einer anderen Ausführungsform kann die Schablone (17) selbst die Austrittsöffnung (15) am Ende des Beruhigungsrohres (14) bilden, sie stellt damit eine Verlängerung des letzteren dar; die Schablone (17) kann auch drehbar angeordnet sein, wobei ihr Antrieb wiederum durch den Regler (10) geregelt erfolgt und synchron zur Taktzahl ist.In another embodiment, the template (17) itself can form the outlet opening (15) at the end of the calming tube (14), thus representing an extension of the latter; the template (17) can also be arranged rotatably, its drive again being regulated by the controller (10) and being synchronous with the number of cycles.
Durch die Figur 3 wird ein Querschnitt durch eine Düsenkombination mit einem Einspritzdüsenventil wiedergegeben. Ein Einspritzdüsenventil (8) wird von einer pulsierend arbeitenden Dosierpumpe (18) synchron zur geforderten Taktzahl angesteuert. Das Einspritzdüsenventil (8) setzt sich aus Ventilsitz (19), Kolben (20), Einstellfeder (21) und Leckanschluß (22) zusammen. Durch Luftzutrittsöffnungen (23), die kreisförmig angeordnet sind, unterbrochen, sitzt an der Ventilöffnung ein Beruhigungsrohr (14) an. Am Ende des Beruhigungsrohres sind als Austrittsöffnungen Schlitze (15) angebracht. Eine Ablenkvorrichtung (16) auf der Achse (12) sorgt für die Ablenkung des Gutes, das gegebenenfalls eine Schablone (17) passiert bevor es auf den vorgesehenen Zonen auftrifft. Die Schablone (17) sorgt für ein moduliertes Auftragen des Gutes auf die zu beaufschlagenden Zonen. Ein Motor M treibt über eine Nockenwelle (24) mit Nocken (25) z. B. eine Kolbenpumpe (18) an. Aus einem Vorratsbehälter (6), gesichert durch ein Rückschlagventil (7), wird die Flüssigkeit mittels der Kolbenpumpe (18) dem Einspritzdüsenventil zugeleitet.3 shows a cross section through a nozzle combination with an injection nozzle valve. An injector valve (8) is controlled by a pulsating metering pump (18) in synchronism with the required number of cycles. The injector valve (8) consists of a valve seat (19), piston (20), adjusting spring (21) and leakage connection (22). Interrupted by air access openings (23), which are arranged in a circle, a settling pipe (14) sits on the valve opening. At the end of the calming tube, slots (15) are provided as outlet openings. A deflection device (16) on the axis (12) ensures the deflection of the material, which if necessary passes a template (17) before it hits the intended zones. The template (17) ensures a modulated application of the goods to the zones to be loaded. An engine M drives a camshaft (24) with cams (25) z. B. a piston pump (18). From a storage container (6), secured by a check valve (7), the liquid is fed to the injection nozzle valve by means of the piston pump (18).
In manchen Fällen empfiehlt es sich bei den Ausführungen mit Venturi-Düse in Verbindung mit Drehschieberventil und Be ruhigungsrohr auf der Achse (12) im Bereich B der Venturi-Düse, versetzt zu den Drehschieberbohrungen, und in gleicher Weise im Bereich des Beruhigungsrohres (14), auch bei der Ausführungsform mit dem Einspritzventil, Bürst- oder Abstreifelemente anzuordnen, um das Innere dieser Elemente von etwaigen Niederschlägen oder Ausfällungen aus der Flüssigkeit frei zu halten.In some cases, it is recommended for versions with a venturi nozzle in conjunction with a rotary slide valve and loading Calming tube on the axis (12) in area B of the venturi nozzle, offset to the rotary slide bores, and in the same way in the area of the calming tube (14), also in the embodiment with the injection valve, brushing or wiping elements to arrange the inside of these Keep elements free of any precipitation or precipitation from the liquid.
Claims (6)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3811261 | 1988-04-02 | ||
DE3811261A DE3811261A1 (en) | 1988-04-02 | 1988-04-02 | DEVICES FOR THE CONTROLLED RELEASE OF DOSED AMOUNTS OF LIQUIDS FINE DISTRIBUTED IN GASES |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0336198A2 true EP0336198A2 (en) | 1989-10-11 |
EP0336198A3 EP0336198A3 (en) | 1990-08-16 |
Family
ID=6351319
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP89104988A Withdrawn EP0336198A3 (en) | 1988-04-02 | 1989-03-21 | Devices for controlling the delivery of dosed quantities of sprayed liquids contained in a gas |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0336198A3 (en) |
JP (1) | JPH01299657A (en) |
DE (1) | DE3811261A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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CN108115106A (en) * | 2018-01-25 | 2018-06-05 | 温岭立骅机械有限公司 | Die casting machine and its automatic spray apparatus |
US10967597B2 (en) | 2016-12-01 | 2021-04-06 | Fette Compacting Gmbh | Method and system for feeding a lubricating or releasing agent to pressing tools of a tablet press |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
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DE4007080C2 (en) * | 1990-03-07 | 1995-01-26 | Heinz Dipl Ing Baumgart | Device for introducing and atomizing conveyable media, especially in combustion rooms |
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 |
DE19730617A1 (en) * | 1997-07-17 | 1999-01-21 | Abb Research Ltd | Pressure atomizer nozzle |
JP4624859B2 (en) * | 2005-06-02 | 2011-02-02 | 株式会社畑鉄工所 | Powder lubricant injection device and rotary powder compression molding machine |
DE102008026449A1 (en) * | 2008-06-03 | 2009-12-10 | Steur, Anne Karin | Apparatus and method for pulse ejection of medium |
DE102011112519A1 (en) * | 2011-09-07 | 2013-03-07 | Gottfried Wilhelm Leibniz Universität Hannover | Device for applying a medium to an object and method for detecting deviations of a spray field |
CN108915039B (en) * | 2018-07-27 | 2021-10-29 | 厦门建霖健康家居股份有限公司 | Water outlet device |
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WO1987001310A1 (en) * | 1985-09-04 | 1987-03-12 | Peterson American Corp. | Process and apparatus for high pressure impact coating |
EP0255947A2 (en) * | 1986-08-07 | 1988-02-17 | Dr. Fehr GmbH | Device for producing a pulsating jet of liquid |
GB2210473A (en) * | 1987-09-29 | 1989-06-07 | Michael Andrew Christophe Lowe | Control of fluid dispensing |
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FR2334427A1 (en) * | 1975-12-09 | 1977-07-08 | Renault | MULTI-NOZZLE BLOCK FOR SPRAYING TOOLING SURFACES |
DE2821141A1 (en) * | 1978-05-13 | 1979-11-22 | Eugen Woerner Gmbh & Co Zentra | Viscous fluid and compressed air spraying equipment - has cylinder chamber connected alternately to fluid supply and nozzles |
DE3014114C2 (en) * | 1980-04-12 | 1982-04-29 | Gema AG Apparatebau, 9015 St. Gallen | Device for the automatic coating of objects with a spray device |
DE3016458A1 (en) * | 1980-04-29 | 1981-11-19 | Robert Bosch Gmbh, 7000 Stuttgart | Coating thickness of article measured immediately after application - by radiometric thickness method and used to regulate coating apparatus |
CH647061A5 (en) * | 1980-05-13 | 1984-12-28 | Lonza Ag | METHOD AND DEVICE FOR SPRAYING DISPERSE SYSTEMS. |
-
1988
- 1988-04-02 DE DE3811261A patent/DE3811261A1/en not_active Withdrawn
-
1989
- 1989-03-21 EP EP89104988A patent/EP0336198A3/en not_active Withdrawn
- 1989-03-31 JP JP1081376A patent/JPH01299657A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1987001310A1 (en) * | 1985-09-04 | 1987-03-12 | Peterson American Corp. | Process and apparatus for high pressure impact coating |
EP0255947A2 (en) * | 1986-08-07 | 1988-02-17 | Dr. Fehr GmbH | Device for producing a pulsating jet of liquid |
GB2210473A (en) * | 1987-09-29 | 1989-06-07 | Michael Andrew Christophe Lowe | Control of fluid dispensing |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10967597B2 (en) | 2016-12-01 | 2021-04-06 | Fette Compacting Gmbh | Method and system for feeding a lubricating or releasing agent to pressing tools of a tablet press |
CN108115106A (en) * | 2018-01-25 | 2018-06-05 | 温岭立骅机械有限公司 | Die casting machine and its automatic spray apparatus |
CN108115106B (en) * | 2018-01-25 | 2024-05-17 | 温岭立骅机械有限公司 | Die casting machine and automatic spraying device thereof |
Also Published As
Publication number | Publication date |
---|---|
EP0336198A3 (en) | 1990-08-16 |
DE3811261A1 (en) | 1989-10-19 |
JPH01299657A (en) | 1989-12-04 |
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