EP0890513B1 - Dosing device for bulk material to be filled in containers - Google Patents
Dosing device for bulk material to be filled in containers Download PDFInfo
- Publication number
- EP0890513B1 EP0890513B1 EP98111480A EP98111480A EP0890513B1 EP 0890513 B1 EP0890513 B1 EP 0890513B1 EP 98111480 A EP98111480 A EP 98111480A EP 98111480 A EP98111480 A EP 98111480A EP 0890513 B1 EP0890513 B1 EP 0890513B1
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- EP
- European Patent Office
- Prior art keywords
- cone
- metering
- flow
- actuator
- metering device
- 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
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- 239000013590 bulk material Substances 0.000 title 1
- 230000005484 gravity Effects 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 14
- 238000005303 weighing Methods 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005429 filling process Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Images
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D90/00—Component parts, details or accessories for large containers
- B65D90/54—Gates or closures
- B65D90/62—Gates or closures having closure members movable out of the plane of the opening
- B65D90/626—Gates or closures having closure members movable out of the plane of the opening having a linear motion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65B—MACHINES, APPARATUS OR DEVICES FOR, OR METHODS OF, PACKAGING ARTICLES OR MATERIALS; UNPACKING
- B65B37/00—Supplying or feeding fluent-solid, plastic, or liquid material, or loose masses of small articles, to be packaged
- B65B37/16—Separating measured quantities from supply
- B65B37/18—Separating measured quantities from supply by weighing
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D88/00—Large containers
- B65D88/54—Large containers characterised by means facilitating filling or emptying
- B65D88/64—Large containers characterised by means facilitating filling or emptying preventing bridge formation
- B65D88/68—Large containers characterised by means facilitating filling or emptying preventing bridge formation using rotating devices
Definitions
- the invention relates to a metering device for filling pourers into containers, in particular sacks by means of a gravity principle Sack filling machine with a funnel-like inlet container in the lower one Area a metering cone is arranged, which is used for interruption and for switching of the filling material flow from a coarse flow into a fine flow by means of a controllable actuator can be moved in the vertical direction.
- the filling material flows in from a silo the inlet container.
- the actuator of the dosing cone is preferably one Scales controlled. After switching from coarse to fine flow, the resistance becomes increased in the annular gap.
- the dosing cone is used to reach the target weight closed.
- the lower area of the inlet container is frustoconical designed such that between the outer surface of the dosing cone and the truncated cone Area creates an annular gap, the size of which depends on the respective Position of the dosing cone.
- the weighing process takes place accordingly discontinuous, which, however, ensures optimal weight accuracy.
- the contents to be filled by means of the metering device are limited because the flow property of the filling material is filled with such a metering device must enable.
- the different filling goods show very different ones Dosing behavior, even if the chemical composition is the same or is similar.
- the flow behavior of a product is particularly dependent on the material properties and the state of deposition. Fill goods in particular tend to do so with a high internal coefficient of friction, cohesive or moist products that form stable material bridges over the annular gap delimited by the dosing cone. Such Bridges not only hinder the flow of the filling material, but also accommodate it Circumstances completely to a standstill. For an optimal filling time and a high weight accuracy However, a continuous flow of the filling material is essential Requirement.
- Fine-grained and powdery fillings have the property that they are already solidify with a relatively short storage. This process is called in the Industry the so-called time consolidation. This is also an even one River no longer guaranteed.
- flap inlet In order to ensure the continuous flow of the filling material, was with relatively good flow properties a so-called flap inlet developed, which has a fine flow opening that is approximately square and therefore less open different flow properties responded. With this flap inlet improves the weight accuracy compared to the dosing cone, but is disadvantageous the much higher effort and the more difficult cleaning. The cleaning is an important effect, since different ones are usually used by means of a metering device Fill goods are dosed.
- a silo discharge device which with a Conical closure body is equipped, which is in an open and in a closed position is linearly displaceable by means of a displacement drive.
- the closure body consists of an upper and a lower part, the upper part by means of an Internally arranged compression spring can be moved.
- the closure body can be driven in rotation by means of a rotary drive.
- the closure body equipped with several cutting knives to form lumps or agglomerates to shred. This creates the required installation space for the silo discharge device reduced because the number of components compared to known designs was reduced. Large quantities of filling material are withdrawn from a silo, that are not weighed.
- Weighing is carried out, for example, by Weighing the empty and filled silo vehicle or by volume. At after the coarse and fine flow filling machines will be extremely accurate Weight of the filled container is required. In addition, different ones tend Bulk goods to bridge within the given by the dosing cone Annular gap. The use is therefore limited.
- the task is solved by the actuator a rotary drive to drive of the dosing cone is assigned around its axis of symmetry.
- a structurally simple solution is achieved by the rotary drive from an additional Gear motor and a drive connection between the output pin the geared motor and the shaft of the metering cone producing drive element, preferably a chain of wheels.
- Such components are from Relevant manufacturers offered inexpensively.
- the actuator as a servo motor or Step-switching drive is formed.
- the actuator was a piston-cylinder unit, so that only three positions, namely coarse flow, fine flow and closed approached could become.
- the adjustment speed could only be at the end of the travel be changed if the piston-cylinder unit is equipped with end position damping was.
- the dosing cone can now be moved to a variety of positions.
- This servo or step switch drive works extremely precisely, which makes the weight accuracy is increased. You can also use it for different products different positions are approached, each position freely selectable and is started automatically.
- the actuator is the actuator of a control loop is.
- the servo drive advantageously includes a drive pulley to which a crank is articulated, the other end to an adjusting lever is articulated, which is coupled to the shaft of the dosing cone.
- the dosing cone is equipped with impellers.
- the metering device shown is for a filling machine, not shown overall designed that works on the principle of gravity. It is with an inlet container 10 equipped, which is designed conical in the lower area, wherein the cross section is reduced towards the bottom. This conical area of the Inlet container 10 is associated with a dosing cone 11, the cross section of which follows above, that is to say reduced to the inlet container 10.
- the dosing cone 11 is on one Shaft 12 fixedly arranged.
- This rotary drive consists in essentially of a geared motor 13 and two spur gears 14, 15, the Spur gear 14 on the output pin of the geared motor 13 and the spur gear 15 is rotatably placed on the shaft 12.
- Fig. 1 the open position of the dosing cone 11 is drawn, that is Annular gap to the lower edge of the conical part of the inlet container 10 is at biggest. In this position, the filling process takes place using the coarse flow method.
- Below the inlet container 10 is, in a manner not shown, the weighing container of a net scale arranged. This net scale is arranged below the flange 16.
- the dosing cone 11 can be relatively adjusted by means of an actuating drive which is explained in greater detail move small steps or continuously upwards so that the annular gap to the conical area of the inlet container 10 becomes correspondingly smaller. After a a certain amount in the weighing container is switched to fine flow. In this position of the dosing cone 11, the annular gap is significantly smaller.
- the dosing cone 11 is moved into the closed position, so that the product flow is switched off.
- the dosing cone moves in this position 11 in the illustrated embodiment against a seal 17.
- the actuator 18th consists in the illustrated embodiment of a servo motor 19, on the Output pin a disc 20 is rotatably mounted.
- the disc is by means of a Linkage coupled with the shaft 12 in terms of drive technology.
- a coupling 21 is articulated to the disk 20, which is articulated at the other end with a rocker arm 22.
- This Rocker arm 22 is pivotally mounted in the central area.
- the paddock 21 opposite end is by means of a fork 23 with the upper end of the shaft 12 coupled.
- the dosing cone 11 is in the lowest position, so that the annular gap to the conical Area of the inlet container 10 is largest. If the disc 20 is one Twisted by 180 degrees, the dosing cone 11 is in the closed position. Between the open and the closed position, it can either be stepless or in relatively small jumps take up any position.
- the servomotor 19 can be the actuator of a control loop. This allows the Dosing cone 11 in the various types of goods in the optimal positions be driven.
- the filling material first arrives in the inlet container from a silo (not shown) 10 and from there into the weighing container of the net scale.
- the net scale is for example, a downpipe or a filling funnel connected to the one to be filled Sack is attached.
- Essential is the drive of the dosing cone around its axis of symmetry.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Basic Packing Technique (AREA)
- Filling Or Emptying Of Bunkers, Hoppers, And Tanks (AREA)
- Vending Machines For Individual Products (AREA)
Abstract
Description
Die Erfindung betrifft eine Dosiereinrichtung zum Abfüllen von Schüttügern in Behältnisse, insbesondere Säcke mittels einer nach dem Schwerkraftprinzip arbeitenden Füllmaschine für Säcke mit einem trichterartigen Einlaufbehälter in dessen unteren Bereich ein Dosierkegel angeordnet ist, der zur Unterbrechung und zur Umschaltung des Füllgutstromes von einem Grobstrom in einen Feinstrom mittels eines steuerbaren Stelltriebes in vertikaler Richtung verfahrbar ist.The invention relates to a metering device for filling pourers into containers, in particular sacks by means of a gravity principle Sack filling machine with a funnel-like inlet container in the lower one Area a metering cone is arranged, which is used for interruption and for switching of the filling material flow from a coarse flow into a fine flow by means of a controllable actuator can be moved in the vertical direction.
Bei einer nach dem Schwerkraftprinzip arbeitenden, aus der US 3 498 344 bekannten Füllmaschine für Säcke fließt das Füllgut im freien Fall durch die einzelnen Stationen der Füllmaschine ohne Verwendung von mechanischen Förderelementen oder ähnlichen Bauteilen. Es werden die verschiedensten Füllgüter abgefüllt. Die Anforderungen hinsichtlich der Leistung und der Gewichtsgenauigkeit der gefüllten Säcke sind heute besonders hoch. Die Füllmaschinen arbeiten aus diesem Grunde nach dem Grob- und Feinstromverfahren, das heißt bis zu einem Gewicht, welches kurz unterhalb des Endgewichtes liegt, erfolgt der Füllvorgang im Grobstrom und wird dann auf einen Feinstrom umgeschaltet. Die Menge des in einer Zeiteinheit einströmenden Füllgutes im Grobstrom ist dabei deutlich höher als im Feinstrom. Durch den Feinstrom soll erreicht werden, daß das tatsächliche Gewicht möglichst innerhalb ganz enger Toleranzen zum Sollgewicht liegt. Das Füllgut strömt aus einem Silo in den Einlaufbehälter ein. Der Stelltrieb des Dosierkegels wird vorzugsweise von einer Waage gesteuert. Nach dem Umschalten vom Grob- in den Feinstrom wird der Widerstand im Ringspalt erhöht. Zum Erreichen des Sollgewichtes wird der Dosierkegel geschlossen. Dazu ist der untere Bereich des Einlaufbehälters kegelstumpfförmig derart gestaltet, daß zwischen der Mantelfläche des Dosierkegels und dem kegelstumpfförmigen Bereich ein Ringspalt entsteht, dessen Größe sich nach der jeweiligen Stellung des Dosierkegels richtet.In a working on the principle of gravity, known from US 3,498,344 The filling machine for sacks flows freely through the individual stations the filling machine without the use of mechanical conveying elements or similar components. A wide variety of filling goods are filled. The requirements regarding the performance and the weight accuracy of the filled sacks are particularly high today. For this reason, the filling machines rework the coarse and fine flow method, i.e. up to a weight that is short is below the final weight, the filling process takes place in the coarse flow and is then switched to a fine flow. The amount of inflowing in a unit of time The contents in the coarse flow are significantly higher than in the fine flow. By the Fine flow should be achieved so that the actual weight is as possible within very close tolerances to the target weight. The filling material flows in from a silo the inlet container. The actuator of the dosing cone is preferably one Scales controlled. After switching from coarse to fine flow, the resistance becomes increased in the annular gap. The dosing cone is used to reach the target weight closed. For this purpose, the lower area of the inlet container is frustoconical designed such that between the outer surface of the dosing cone and the truncated cone Area creates an annular gap, the size of which depends on the respective Position of the dosing cone.
Bei der zuvor beschriebenen Dosiereinrichtung erfolgt der Wägevorgang demzufolge diskontinuierlich, wodurch jedoch eine optimale Gewichtsgenauigkeit erreicht wird. Jedoch sind die mittels der Dosiereinrichtung abzufüllenden Füllgüter beschränkt, da die Fließeigenschaft des Füllgutes das Abfüllen mit einer solchen Dosiereinrichtung ermöglichen muß. Die unterschiedlichen Füllgüter zeigen stark voneinander abweichende Dosierverhalten, selbst wenn die chemische Zusammensetzung gleich oder gleichartig ist. Das Fließverhalten eines Füllgutes ist besonders von den Materialeigenschaften und dem Ablagerungszustand abhängig. So neigen vor allem Füllgüter mit einem hohen inneren Reibwert, kohäsive oder feuchte Füllgüter dazu, daß sich stabile Gutbrücken über den von dem Dosierkegel begrenzten Ringspalt bilden. Derartige Brücken behindern nicht nur den Fluß des Füllgutes, sondern bringen ihn unter Umständen vollständig zum Erliegen. Für eine optimale Füllzeit und eine hohe Gewichtsgenauigkeit ist jedoch ein kontinuierlicher Fluß des Füllgutes eine wesentliche Voraussetzung.With the dosing device described above, the weighing process takes place accordingly discontinuous, which, however, ensures optimal weight accuracy. However, the contents to be filled by means of the metering device are limited because the flow property of the filling material is filled with such a metering device must enable. The different filling goods show very different ones Dosing behavior, even if the chemical composition is the same or is similar. The flow behavior of a product is particularly dependent on the material properties and the state of deposition. Fill goods in particular tend to do so with a high internal coefficient of friction, cohesive or moist products that form stable material bridges over the annular gap delimited by the dosing cone. Such Bridges not only hinder the flow of the filling material, but also accommodate it Circumstances completely to a standstill. For an optimal filling time and a high weight accuracy However, a continuous flow of the filling material is essential Requirement.
Feinkörnige und pulverförmige Füllgüter haben die Eigenschaft, daß sie sich bereits bei einer relativ kurzen Lagerung verfestigen. Diesen Vorgang nennt man in der Branche die sogenannte Zeitverfestigung. Dadurch ist ebenfalls ein gleichmäßiger Fluß nicht mehr gewährleistet.Fine-grained and powdery fillings have the property that they are already solidify with a relatively short storage. This process is called in the Industry the so-called time consolidation. This is also an even one River no longer guaranteed.
Um den kontinuierlichen Fluß des Füllgutes sicherzustellen, wurde bei Füllgütern mit relativ guten Fließeigenschaften ein sogenannter Klappeneinlauf entwickelt, welcher eine Feinströmöffnung aufweist, die annähernd quadratisch ist und somit weniger auf unterschiedliche Fließeigenschaften reagiert. Mit diesem Klappeneinlauf wird zwar die Gewichtsgenauigkeit gegenüber dem Dosierkegel verbessert, nachteilig ist jedoch der wesentlich höhere Aufwand und die schwierigere Reinigung. Die Reinigung ist ein bedeutender Effekt, da üblicherweise mittels einer Dosiereinrichtung unterschiedliche Füllgüter dosiert werden.In order to ensure the continuous flow of the filling material, was with relatively good flow properties a so-called flap inlet developed, which has a fine flow opening that is approximately square and therefore less open different flow properties responded. With this flap inlet improves the weight accuracy compared to the dosing cone, but is disadvantageous the much higher effort and the more difficult cleaning. The cleaning is an important effect, since different ones are usually used by means of a metering device Fill goods are dosed.
Um die einzelnen, schlecht fließenden Füllgüter überhaupt abfüllen zu können, sind viele Dosiersysteme bekannt, wie z. B. Schneckendosierer, Vibrationsdosierer, pneumatische Förderrinnen, Banddosierer, Zellenradschleusen, Kammerdosierer, Drehtellerdosierer, Dosierschieber, Kolbendosierer und dergleichen. Nachteilig ist jedoch, daß die Abfülleistung bei gleichem Aufwand gegenüber dem Dosierkegel geringer ist, und daß die Reinigung unter erschwerten Bedingungen vorgenommen werden muß. In order to be able to fill the individual, poorly flowing filling goods at all many dosing systems known, such. B. screw feeder, vibration feeder, pneumatic conveyor troughs, belt dosing devices, rotary feeders, chamber dosing devices, Turntable dispenser, metering slide, piston dispenser and the like. However, the disadvantage is that the filling performance with the same effort compared to the dosing cone is lower and that cleaning is done under difficult conditions must become.
Aus der DE 34 25 292 A1 ist eine Siloaustragsvorrichtung bekannt, die mit einem konischen Verschlußkörper ausgestattet ist, der in eine Offen- und in eine Schließstellung mittels eines Verschiebeantriebes linear verfahrbar ist. Der Verschlußkörper besteht aus einem Ober- und einem Unterteil, wobei das Oberteil mittels einer im Inneren angeordneten Druckfeder verfahren werden kann. Außerdem ist der Verschlußkörper mittels eines Drehantriebes rotierend antreibbar. Außerdem ist der Verschlußkörper mit mehreren Schneidmeissern ausgestattet, um Klumpen oder Agglomerate zu zerkleinern. Dadurch wird der benötigte Einbauraum für die Siloaustragevorrichtung verkleinert, da die Anzahl der Bauelemente gegenüber bekannten Konstruktionen verrringert wurde. Aus einem Silo werden große Mengen von Füllgut abgezogen, die nicht gewogen werden. Die Verwiegung erfolgt beispielsweise durch Wiegen des leeren und gefüllten Silofahrzeuges oder nach dem Volumen. Bei nach dem Grob- und Feinstromverfahren arbeitenden Füllmaschinen wird ein äußerst genaues Gewicht des gefüllten Behältnisses verlangt. Außerdem neigen verschiedene Schüttgüter zu einer Brückenbildung innerhalb des durch den Dosierkegel gegebenen Ringspaltes. Der Einsatz ist deshalb begrenzt.From DE 34 25 292 A1 a silo discharge device is known, which with a Conical closure body is equipped, which is in an open and in a closed position is linearly displaceable by means of a displacement drive. The closure body consists of an upper and a lower part, the upper part by means of an Internally arranged compression spring can be moved. In addition, the closure body can be driven in rotation by means of a rotary drive. In addition, the closure body equipped with several cutting knives to form lumps or agglomerates to shred. This creates the required installation space for the silo discharge device reduced because the number of components compared to known designs was reduced. Large quantities of filling material are withdrawn from a silo, that are not weighed. Weighing is carried out, for example, by Weighing the empty and filled silo vehicle or by volume. At after the coarse and fine flow filling machines will be extremely accurate Weight of the filled container is required. In addition, different ones tend Bulk goods to bridge within the given by the dosing cone Annular gap. The use is therefore limited.
Ausgehend von einer durch die US 3 498 344 A vorbekannten Füllmaschine liegt der Erfindung die Aufgabe zugrunde, die Dosiereinrichtung einer solchen Füllmaschine so weiterzuentwickeln, daß sie auch für Füllgüter verwendet werden kann, die bislang mit anderen Systemen dosiert werden mußten. Dabei soll der konstruktive Aufwand jedoch gering und die gute Reinigungsmöglichkeit erhalten bleiben.Starting from a filling machine previously known from US 3,498,344 A, the Invention, the object of the metering device of such a filling machine to evolve so that it can also be used for filling goods that were previously had to be dosed with other systems. The design effort however low and the good cleaning possibility is retained.
Die gestellte Aufgabe wird gelöst, indem dem Stelltrieb ein Drehantrieb zum Antrieb des Dosierkegels um seine Symmetrieachse zugeordnet ist.The task is solved by the actuator a rotary drive to drive of the dosing cone is assigned around its axis of symmetry.
Da nunmehr der Dosierkegel rotierend antreibbar ist, wird jede entstehende Brückenbildung des Füllgutes im Bereich des Dosierkegels verhindert, so daß der Füllgutstrom kontinuierlich fließen kann, wodurch er äußerst genau dosiert werden kann. Da die Brückenbildung nunmehr bei vielen Füllgütern ausgeschlossen werden kann, läßt sich das Einsatzgebiet einer Dosiereinrichtung mit einem Dosierkegel wesentlich erhöhen oder in der Umkehrung können mit der gleichen Dosiereinrichtung weitaus mehr Füllgüter abgefüllt werden als bislang der Fall war. Der Vorteil der optimalen Reinigung bleibt dabei voll erhalten. Der konstruktive Aufwand für einen Drehantrieb bleibt ebenfalls gering.Since the dosing cone can now be driven in rotation, any bridging that arises of the filling material in the area of the dosing cone is prevented, so that the filling material flow can flow continuously, which means that it can be dosed extremely precisely. There the bridging can now be ruled out for many products the area of application of a dosing device with a dosing cone increases significantly or in reverse can do much with the same metering device more filling goods are filled than was previously the case. The advantage of optimal Cleaning remains fully intact. The design effort for a rotary drive also remains low.
Während in der Vergangenheit mit der in Rede stehenden Dosiereinrichtung besonders körnige Produkte abgefüllt wurden, können nunmehr auch pulverförmige Produkte abgefüllt werden, so daß mit einem System eine breitere Produktpalette abgefüllt werden kann, und zwar mit höherer Leistung und höherer Gewichtsgenauigkeit.While in the past especially with the dosing device in question granular products have been filled, can now also powder products be filled so that a wider range of products can be filled with one system can be, with higher performance and higher weight accuracy.
Eine konstruktiv einfache Lösung wird erreicht, indem der Drehantrieb aus einem zusätzlichen Getriebemotor und einem die Antriebsverbindung zwischen dem Abtriebszapfen des Getriebemotors und der Welle des Dosierkegels herstellenden Antriebselementes, vorzugsweise einer Räderkette besteht. Derartige Bauteile werden von einschlägigen Herstellern preisgünstig angeboten.A structurally simple solution is achieved by the rotary drive from an additional Gear motor and a drive connection between the output pin the geared motor and the shaft of the metering cone producing drive element, preferably a chain of wheels. Such components are from Relevant manufacturers offered inexpensively.
In weiterer Ausgestaltung ist vorgesehen, daß der Stelltrieb als Servomotor oder Schritt-Schalt-Antrieb ausgebildet ist. Bei den bisher bekannten Dosiereinrichtungen mit einem verstellbaren Dosierkegel war der Stelltrieb eine Kolbenzylindereinheit, so daß nur drei Positionen, nämlich Grobstrom, Feinstrom und Geschlossen angefahren werden konnten. Die Verstellgeschwindigkeit konnte nur am Ende des Verfahrweges geändert werden, wenn die Kolbenzylindereinheit mit einer Endlagendämpfung ausgestattet war. Nunmehr wird eine hohe und gleichmäßige Verfahrgeschwindigkeit sowie eine exakte und flexible Positionierung erreicht. Innerhalb des Verstellweges des Dosierkegels kann nunmehr eine Vielzahl von Positionen angefahren werden. Dieser Servo- oder Schritt-Schalt-Antrieb arbeitet äußerst genau, wodurch die Gewichtsgenauigkeit erhöht wird. Außerdem können für unterschiedliche Füllgüter auch unterschiedliche Positionen angefahren werden, wobei jede Position frei wählbar und automatisch angefahren wird.In a further embodiment it is provided that the actuator as a servo motor or Step-switching drive is formed. In the previously known metering devices with an adjustable dosing cone, the actuator was a piston-cylinder unit, so that only three positions, namely coarse flow, fine flow and closed approached could become. The adjustment speed could only be at the end of the travel be changed if the piston-cylinder unit is equipped with end position damping was. Now there is a high and steady travel speed as well as an exact and flexible positioning. Within the adjustment range The dosing cone can now be moved to a variety of positions. This servo or step switch drive works extremely precisely, which makes the weight accuracy is increased. You can also use it for different products different positions are approached, each position freely selectable and is started automatically.
Ferner ist es möglich, über die Auswertung des Füllgutstromes diese Dosierstellungen selbsttätig den Fließeigenschaften anzupassen, um gleichbleibende Leistungen bei hohen Gewichtsgenauigkeiten auch bei unterschiedlichsten Füllgütern sicherzustellen.Furthermore, it is possible to evaluate these metering positions by evaluating the flow of the product automatically adapt to the flow properties to ensure constant performance Ensure with high weight accuracy even with a wide variety of goods.
In weiterer Ausgestaltung ist vorgesehen, daß der Stelltrieb das Stellglied eines Regelkreises ist. Der Servoantrieb beinhaltet in vorteilhafter Weise eine Antriebsscheibe an die eine Kurbel angelenkt ist, die mit dem anderen Ende an einem Verstellhebel angelenkt ist, der mit der Welle des Dosierkegels gekoppelt ist.In a further embodiment it is provided that the actuator is the actuator of a control loop is. The servo drive advantageously includes a drive pulley to which a crank is articulated, the other end to an adjusting lever is articulated, which is coupled to the shaft of the dosing cone.
Um eine Brückenbildung im Zulaufbereich noch weiterhin zu unterbinden ist vorgesehen, daß der Dosierkegel mit Rührflügeln bestückt ist. In order to further prevent bridging in the inlet area, that the dosing cone is equipped with impellers.
Anhand der beiliegenden Zeichnungen wird die Erfindung noch näher erläutert.The invention is explained in more detail with reference to the accompanying drawings.
- Figur 1Figure 1
- den Bereich des Einlaufbehälters einer erfindungsgemäßen Dosiereinrichtung in einer Frontansicht undthe area of the inlet container of a metering device according to the invention in a front view and
- Figur 2Figure 2
- eine der Fig. 1 entsprechende Seitenansicht.a side view corresponding to FIG. 1.
Die dargestellte Dosiereinrichtung ist für eine im ganzen nicht dargestellte Füllmaschine
ausgelegt, die nach dem Schwerkraftprinzip arbeitet. Sie ist mit einem Einlaufbehälter
10 ausgerüstet, der im unteren Bereich kegelförmig gestaltet ist, wobei
sich der Querschnitt nach unten hin verkleinert. Diesem kegelförmigen Bereich des
Einlaufbehälters 10 ist ein Dosierkegel 11 zugeordnet, dessen Querschnitt sich nach
oben, das heißt zum Einlaufbehälter 10 hin verkleinert. Der Dosierkegel 11 ist auf einer
Welle 12 fest angeordnet. Mittels eines Drehantriebes wird die Welle 12 und somit
auch der Dosierkegel 11 rotierend angetrieben. Dieser Drehantrieb besteht im
wesentlichen aus einem Getriebemotor 13 und zwei Stirnrädern 14, 15, wobei das
Stirnrad 14 auf den Abtriebszapfen des Getriebemotors 13 drehfest und das Stirnrad
15 drehfest auf die Welle 12 aufgesetzt ist.The metering device shown is for a filling machine, not shown overall
designed that works on the principle of gravity. It is with an
In der Fig. 1 ist die Offenstellung des Dosierkegels 11 gezeichnet, das heißt der
Ringspalt zum unteren Rand des kegelförmigen Teils des Einlaufbehälters 10 ist am
größten. In dieser Stellung erfolgt der Füllvorgang im Grobstromverfahren. Unterhalb
des Einlaufbehälters 10 ist in nicht dargestellter Weise der Wägebehälter einer Nettowaage
angeordnet. Diese Nettowaage ist unterhalb des Flansches 16 angeordnet.
Mittels eines noch näher erläuterten Stelltriebes läßt sich der Dosierkegel 11 in relativ
kleinen Schritten oder stufenlos nach oben verfahren, so daß der Ringspalt zum
kegelförmigen Bereich des Einlaufbehälters 10 entsprechend kleiner wird. Nach einer
bestimmten Menge im Wägebehälter erfolgt die Umstellung auf den Feinstrom. In
dieser Stellung des Dosierkegels 11 ist der Ringspalt wesentlich kleiner. Nachdem
das Sollgewicht erreicht wurde, wird der Dosierkegel 11 in die Schließstellung verfahren,
so daß der Füllgutstrom abgeschaltet ist. In dieser Stellung fährt der Dosierkegel
11 im dargestellten Ausführungsbeispiel gegen eine Dichtung 17. Der Stelltrieb 18
besteht im dargestellten Ausführungsbeispiel aus einem Servomotor 19, auf dessen
Abtriebszapfen eine Scheibe 20 drehfest aufgesetzt ist. Die Scheibe ist mittels eines
Gestänges mit der Welle 12 antriebstechnisch gekoppelt.In Fig. 1 the open position of the
Im dargestellten Ausführungsbeispiel ist an die Scheibe 20 eine Koppel 21 angelenkt,
die mit dem anderen Ende mit einem Schwinghebel 22 gelenkig verbunden ist. Dieser
Schwinghebel 22 ist im mittleren Bereich schwenkbar gelagert. Das der Koppel
21 abgewandte Ende ist mittels einer Gabel 23 mit dem oberen Ende der Welle 12
gekoppelt.In the illustrated embodiment, a
Es ergibt sich aus der Fig. 2, daß durch die Stellung der Scheibe 20 sich der Dosierkegel
11 in der untersten Stellung befindet, so daß der Ringspalt zum kegelförmigen
Bereich des Einlaufbehälters 10 am größten ist. Wenn sich die Scheibe 20 um einen
Winkel von 180 Grad verdreht, befindet sich der Dosierkegel 11 in der Schließstellung.
Zwischen der Offen- und der Schließstellung kann er entweder stufenlos oder in
relativ kleinen Sprüngen jede Stellung einnehmen.It follows from Fig. 2 that by the position of the
Der Servomotor 19 kann das Stellglied eines Regelkreises sein. Dadurch kann der
Dosierkegel 11 bei den verschiedenartigen Füllgütern in die jeweils optimalen Positionen
gefahren werden. The
Das Füllgut gelangt von einem nicht dargestellten Silo zunächst in den Einlaufbehälter 10 und von dort aus in den Wägebehälter der Nettowaage. Der Nettowaage ist beispielsweise ein Fallrohr oder ein Fülltrichter nachgeschaltet, an den der zu füllende Sack angehängt wird.The filling material first arrives in the inlet container from a silo (not shown) 10 and from there into the weighing container of the net scale. The net scale is for example, a downpipe or a filling funnel connected to the one to be filled Sack is attached.
Die Erfindung ist nicht auf das dargestellte Ausführungsbeispiel beschränkt. Wesentlich ist der Antrieb des Dosierkegels um seine Symmetrieachse.The invention is not restricted to the exemplary embodiment shown. Essential is the drive of the dosing cone around its axis of symmetry.
Claims (6)
- Metering device for filling containers, in particular sacks, with bulk materials by means of a filling machine which operates using the gravity principle and has a funnel-shaped inlet container (10), in the lower region of which a metering cone (11) is arranged, which, in order to interrupt the flow of filling material and to switch this flow from a coarse to a fine flow, can be displaced in the vertical direction by means of a controllable actuator (19-23), characterized in that the actuator (19-23) is assigned a rotary drive (13-15) for driving the metering cone (11) about its axis of symmetry.
- Metering device according to Claim 1, characterized in that the rotary drive comprises an additional geared motor (13) and a drive element, preferably a gear chain (14, 15), which produces the drive connection between the output journal of the geared motor (13) and the shaft (12) of the metering cone (11).
- Metering device according to Claim 1, characterized in that the actuator is designed as a servomotor (19) or as a stepper switching drive.
- Metering device according to Claim 3, characterized in that a disc (20) is coupled in a rotationally fixed manner to the output journal of the servomotor (19), on which disc a connecting rod (21) is articulatedly mounted, the opposite end of which rod is articulatedly attached to a rocker arm (22), which is connected by means of a fork (23) to the shaft (12) of the metering cone (11).
- Metering device according to one or more of the preceding Claims 1 to 4, characterized in that the actuator (18) is the actuating member of a control circuit.
- Metering device according to one or more of the preceding Claims 1 to 5, characterized in that the metering cone (11) is equipped with stirrer blades.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19729285A DE19729285A1 (en) | 1997-07-09 | 1997-07-09 | Dosing device for bulk goods to be filled into containers |
| DE19729285 | 1997-07-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP0890513A1 EP0890513A1 (en) | 1999-01-13 |
| EP0890513B1 true EP0890513B1 (en) | 2001-10-31 |
Family
ID=7835103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP98111480A Expired - Lifetime EP0890513B1 (en) | 1997-07-09 | 1998-06-23 | Dosing device for bulk material to be filled in containers |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0890513B1 (en) |
| AT (1) | ATE207837T1 (en) |
| DE (2) | DE19729285A1 (en) |
| ES (1) | ES2165116T3 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19962475C5 (en) * | 1999-12-24 | 2009-09-24 | Erin Intellectual Property Ltd., Birr | Method and device for filling a bag |
| CN102923326B (en) * | 2012-11-09 | 2014-06-04 | 常熟市贝普包装机械有限公司 | Automatic quantitative packing machine with material-stirring function |
| CN114701697B (en) * | 2022-03-08 | 2024-01-09 | 宁波硕罗德机电设备有限公司 | Servo feeding mechanism |
| EP4282394B1 (en) * | 2022-05-23 | 2024-09-25 | Harro Höfliger Verpackungsmaschinen GmbH | Metering device for microtablets |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE698544C (en) * | 1935-01-03 | 1940-11-12 | Jagenberg Werke Ag | Filling device for floury or grainy substances |
| US3498344A (en) * | 1965-06-05 | 1970-03-03 | Haver & Boecker | Apparatus for filling bags with preweighed quantities of material |
| DE2923672A1 (en) * | 1979-06-12 | 1980-12-18 | Metallgesellschaft Ag | Metering system for particulate solids - using vessel with conical base and variable annular outlet with control by flow meter below vessel |
| DE3425592A1 (en) * | 1984-07-11 | 1986-01-23 | Krupp Polysius Ag, 4720 Beckum | Silo discharge device |
| US4756348A (en) * | 1986-08-07 | 1988-07-12 | Hydreclaim Corporation | Control apparatus for plastic blending machinery |
| DE4013290C1 (en) * | 1990-04-26 | 1991-07-25 | Haver & Boecker, 4740 Oelde, De | |
| GB9301635D0 (en) * | 1993-01-27 | 1993-03-17 | Norsk Hydro As | Method and apparatus |
-
1997
- 1997-07-09 DE DE19729285A patent/DE19729285A1/en not_active Withdrawn
-
1998
- 1998-06-23 EP EP98111480A patent/EP0890513B1/en not_active Expired - Lifetime
- 1998-06-23 AT AT98111480T patent/ATE207837T1/en not_active IP Right Cessation
- 1998-06-23 DE DE59801929T patent/DE59801929D1/en not_active Expired - Fee Related
- 1998-06-23 ES ES98111480T patent/ES2165116T3/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| EP0890513A1 (en) | 1999-01-13 |
| ATE207837T1 (en) | 2001-11-15 |
| DE59801929D1 (en) | 2001-12-06 |
| DE19729285A1 (en) | 1999-01-14 |
| ES2165116T3 (en) | 2002-03-01 |
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