EP0223216B2 - Bag-filling machine - Google Patents

Bag-filling machine Download PDF

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Publication number
EP0223216B2
EP0223216B2 EP86115872A EP86115872A EP0223216B2 EP 0223216 B2 EP0223216 B2 EP 0223216B2 EP 86115872 A EP86115872 A EP 86115872A EP 86115872 A EP86115872 A EP 86115872A EP 0223216 B2 EP0223216 B2 EP 0223216B2
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EP
European Patent Office
Prior art keywords
filling
filling pipe
section
filling tube
filling machine
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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.)
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EP86115872A
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German (de)
French (fr)
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EP0223216A1 (en
EP0223216B1 (en
Inventor
Joachim Dr.-Ing. Spiess
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Natronag Gesellschaft fuer Verpackungssysteme mbH
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Natronag Gesellschaft fuer Verpackungssysteme mbH
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Application filed by Natronag Gesellschaft fuer Verpackungssysteme mbH filed Critical Natronag Gesellschaft fuer Verpackungssysteme mbH
Priority to AT86115872T priority Critical patent/ATE42246T1/en
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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
    • B65B1/00—Packaging fluent solid material, e.g. powders, granular or loose fibrous material, loose masses of small articles, in individual containers or receptacles, e.g. bags, sacks, boxes, cartons, cans, or jars
    • B65B1/04—Methods of, or means for, filling the material into the containers or receptacles
    • B65B1/18—Methods of, or means for, filling the material into the containers or receptacles for filling valve-bags

Definitions

  • the invention relates to a filling machine with a device for the pneumatic conveying of the filling material from a storage container provided with an inclined bottom through a rigid, fixedly connected to a weighing device, inclined filling tube, the internal cross section of which is substantially greater in width than height, into a filling tube slide-on valve bag.
  • Filling machines have been known for many years and are used in particular for filling bags with dusty goods. Pneumatic conveying has proven itself in practice. Disadvantages accepted are that the filling tube is not completely emptied at the end of the filling process of a sack, which is controlled by a balance. Since the filling tube is regularly included in the weighing, because the sack to be filled hangs on the filling tube and therefore cannot be weighed independently of the filling tube, this results in an inaccuracy in the weighing process, which leads to the precaution that a little more filling material is regularly added to the weighing tube Sack must be filled as intended. Since a round valve of a valve sack is regularly plugged onto the filling pipes, the filling pipes also have a round inner cross section, which is available for conveying the filling material.
  • a similar filling machine in which the filling tube forms an angle of less than 10 ° with the horizontal, can be found in the company brochure "Description and commissioning E 90 of the HAVER valve bag packing machine type: 540 (LBa) and 545 (LB)" from the company Haver & Boecker known. From DE-U-1 833.573 it is also known to design the inner cross-section of a filling tube oval, the width being substantially greater than the height of the inner cross-section.
  • the invention has for its object to improve a filling machine of the type mentioned so that an improved emptying of the filling tube is achieved at the end of the filling process.
  • the filling tube includes an angle of about 20 ° to 35 ° with the horizontal and that the angle of inclination of the filling tube corresponds to the angle of inclination of the bottom of the storage container.
  • a rectangular, semicircular or elliptical cross-section can be considered as cross-sectional shapes in the filling tube according to the invention.
  • the filling tube has the greatest width at its bottom, which is the case with filling tubes with a rectangular or semicircular cross section.
  • the preferred embodiment is a fill tube with a rectangular cross section.
  • the ratio of width and height of the inner cross section of the filling tube is preferably about 2: 1.
  • this filling tube led to a reduction in the deposit of 30% compared to a filling tube with a round inner cross section.
  • the filling pipe can be constructed with two shells.
  • the space between the two shells can be used to remove the compressed air escaping from the sack.
  • the bottom of the filling pipe can be designed as a ventilation floor. In this way, a type of fluidized bed can be created with which any remaining amount remaining in the filling pipe can be discharged completely.
  • the air supply lines can also be accommodated in the space between the two shells. The previously common, heavily dust-producing blow-out devices with mostly unsatisfactory residual emptying of the filling tube can thus be dispensed with.
  • the outer wall is formed by an inflation hose which automatically forms the required round outer wall when it is inflated with compressed air or the like.
  • the filling machine shown in Figure 1 has a support frame 1 to which a bag chair 2 is attached as part of a weighing device.
  • a filling tube 3 is connected to the arrangement movable with the bag chair 2. Via a rubber piece 4 effecting a decoupling of the weight of the filling tube 3 from the support frame 1, the filling tube 3 continues to a storage cylinder 5, into which the continuation of the filling tube 3 opens.
  • the filling tube 3 is inclined obliquely downwards, its inclination roughly corresponding to the inclination of a bottom 6 of the storage cylinder 5.
  • a plurality of compressed air chambers 7 are arranged below the bottom 6 and are supplied individually with compressed air hoses 8. The pressure in the compressed air lines 8 can be adjusted via the adjusting regulator 9.
  • a shut-off device 10 At the upper end of the storage cylinder 5 there is a shut-off device 10 with which the storage cylinder 5 can be separated from a supply line 11 from a storage bunker (not shown).
  • FIG. 2 and 3 clarify the structure of the filling tube 3 with the devices attached to it.
  • the filling tube 3 is attached at an angle of approximately 20 ° to the horizontal, pointing obliquely downward on the outer wall of the storage cylinder 5 and opens into the latter with a through opening 14 which has exactly the cross section of the filling tube 3.
  • the filling tube has rectangular inner walls 15, the width of its inner cross section being approximately twice as large as the height.
  • the inner wall 15 of the filling tube 3, which forms the bottom, which is horizontal in cross section, is aligned with the bottom 6 of the supply cylinder 5. Below the bottom 6, the associated compressed air chamber 7 is indicated in FIG.
  • the front end of the filling tube 3 has the rectangular inner cross section, which is illustrated in FIG. 2a with a section along the line AB in FIG. 2.
  • a protective plate 16 is attached on the bottom inner wall of the filling tube 3, in which two ventilation lines 17 are guided. These vent lines 17 serve to discharge the conveyed air pumped into the sack with the filling material from the sack.
  • the outer wall of the filling tube 3 has two annularly formed and spaced apart grooves 18, between which a chamber 19 is formed. In the grooves 18 two ends of an inflation hose 20 are fixed in a ring-shaped manner, which spans the chamber 19.
  • a compressed air supply line 21 opens into the chamber 19, through which the compressed air required to inflate the inflation hose 20 is pumped into the chamber 19.
  • the part of the filling tube 3 described so far is connected to the weighing device via the mounting bracket 12. It is followed by the soft rubber piece 4 towards the supply cylinder 5, with which the front part of the filling pipe 3 is decoupled in weight from the remaining part of the filling pipe 3.
  • the part of the rubber piece 4 pointing towards the supply cylinder 5 is fastened to the support frame 1 of the filling machine. It is continued by a further piece of rubber 21 which merges into a fixed line piece 22 attached to the outer wall of the supply cylinder 5.
  • the rubber pieces 4, 21 and the line piece 22 all have the rectangular inner cross section shown in FIG. 2a, so that a smooth flow channel with a rectangular inner cross section is formed for the filling pipe 3.
  • the rubber piece 21 can be partially or completely compressed by means of two pressure pistons 23. Due to the partial compression of the rubber piece 21, the quantity of the product passed through the filling tube 3 is reduced in quantity, that is to say a so-called fine flow is formed. In a known manner, the fine flow serves for the residual filling of the sack largely filled with a coarse flow. By completely compressing the rubber piece 21, the flow is completely interrupted and the filling of the sack is ended.
  • the front part of the filling pipe connected to the weighing device is usually emptied with a blast of compressed air.
  • This emptying is problematic since the blast of compressed air leads to an abrupt increase in the pressure in the sack, which poses a risk of bursting and in the rest of the filling material is dusted by minor leaks.
  • the emptying of the filling pipe is further improved by the fact that the bottom of the filling pipe 3 is at least partially constructed as a sieve, under which a compressed air line 25 ends (cf. FIG. 2a).
  • a compressed air line 25 ends cf. FIG. 2a.

Abstract

1. Filling machine with a device for pneumatic conveying of the filling material from a supply chamber (5) with an inclined floor (6) through a rigid filling pipe (3), connected fixedly to a weighing device and arranged inclined, into a valued bag pushed on to the filling pipe (3), characterized in that the inner cross-section of the filling pipe (3) has a substantially larger width than height, in that the filling pipe (3) makes an angle with the horizontal of up to 35 degrees and in that the angle of inclination of the filling pipe (3) approximately matches the angle of inclination of the bottom (6) of the supply chamber (5).

Description

Die Erfindung betrifft eine Füllmaschine mit einer Einrichtung zum pneumatischen Fördern des Füllgutes aus einem mit einem geneigten Boden versehenen Vorratsbehälter durch ein starres, fest mit einer Wägeeinrichtung verbundenes, geneigt angeordnetes Füllrohr, dessen Innenquerschnitt eine wesentlich größere Breite als Höhe aufweist, in einen auf das Füllrohr aufschiebbaren Ventilsack.The invention relates to a filling machine with a device for the pneumatic conveying of the filling material from a storage container provided with an inclined bottom through a rigid, fixedly connected to a weighing device, inclined filling tube, the internal cross section of which is substantially greater in width than height, into a filling tube slide-on valve bag.

Seit vielen Jahren sind Füllmaschinen (vgl. zum Beispiel US-A-2,879,970) bekannt, die insbesondere für die Befüllung von Säcken mit staubenden Gütern eingesetzt werden. In der Praxis hat sich die pneumatische Förderung an sich bewährt. In Kauf genommene Nachteile bestehen darin, daß das Füllrohr am Ende des Füllvorganges eines Sackes, der durch eine Waage gesteuert wird, nicht vollständig geleert ist. Da das Füllrohr regelmäßig in die Wägung mit einbezogen wird, weil der zu füllende Sack an dem Füllrohr hängt und deshalb nicht unabhängig von dem Füllrohr gewogen werden kann, entsteht hieraus eine Ungenauigkeit beim Wägevorgang, die dazu führt, daß vorsorglich regelmäßig etwas mehr Füllgut in den Sack eingefüllt werden muß als vorgesehen. DA auf die Füllrohre regelmäßig ein rundes Ventil eines Ventilsackes gesteckt wird, haben die Füllrohre auch regelmäßig einen runden Innenquerschnitt aufgewiesen, der für die Förderung des Füllgutes zur Verfügung steht.Filling machines (cf. for example US-A-2,879,970) have been known for many years and are used in particular for filling bags with dusty goods. Pneumatic conveying has proven itself in practice. Disadvantages accepted are that the filling tube is not completely emptied at the end of the filling process of a sack, which is controlled by a balance. Since the filling tube is regularly included in the weighing, because the sack to be filled hangs on the filling tube and therefore cannot be weighed independently of the filling tube, this results in an inaccuracy in the weighing process, which leads to the precaution that a little more filling material is regularly added to the weighing tube Sack must be filled as intended. Since a round valve of a valve sack is regularly plugged onto the filling pipes, the filling pipes also have a round inner cross section, which is available for conveying the filling material.

Eine ähnliche Füllmaschine, bei der die Füllröhre mit der Horizontalen einen Winkel von weniger als 10° bildet, ist durch die Firmenbroschüre "Beschreibung und Inbetriebsetzung E 90 der HAVER-Ventilsack-Packmaschine Type: 540 (LBa) und 545 (LB)" der Firma Haver & Boecker bekannt. Aus der DE-U-1 833,573 ist es ferner bekannt, den Innenquerschnitt einer Füllröhre oval auszubilden, wobei die Breite wesentlich größer als die Höhe des Innenquerschnitts ist.A similar filling machine, in which the filling tube forms an angle of less than 10 ° with the horizontal, can be found in the company brochure "Description and commissioning E 90 of the HAVER valve bag packing machine type: 540 (LBa) and 545 (LB)" from the company Haver & Boecker known. From DE-U-1 833.573 it is also known to design the inner cross-section of a filling tube oval, the width being substantially greater than the height of the inner cross-section.

Durch die DE-B-614 909 ist bei einer Füllmaschine mit einem horizontal stehenden Füllrohr bekannt, das Füllrohr mit einem ovalen Querschnitt auszubilden. Diese ovale Ausbildung des Füllrohres dient zur Verwirklichung eines elastischen Füllrohres, das der Bewegung einer mechanischen Waage, auf der der Sack beim Füllen steht, folgen kann. Da Füllrohre mit einem runden Querschnitt einen zu hohen Biegewiderstand aufweisen, wird ein ovaler Querschnitt vorgesehen, der der Biegung des Füllrohres in der Lotrechten einen geringeren Biegewiderstand entgegensetzt. Bei modernen Füllmaschinen ist das Füllrohr starr und fest mit der Wägeeinrichtung im Rahmengestell der Füllmaschine verbunden, so daß elastische Füllrohre weder erforderlich noch wünschenswert sind.From DE-B-614 909 it is known in a filling machine with a horizontally standing filling tube to design the filling tube with an oval cross section. This oval design of the filling tube is used to implement an elastic filling tube that can follow the movement of a mechanical scale on which the sack stands when it is filled. Since filler tubes with a round cross-section have an excessively high bending resistance, an oval cross-section is provided which opposes the bending of the filler tube in the perpendicular to a lower bending resistance. In modern filling machines, the filling tube is rigidly and firmly connected to the weighing device in the frame of the filling machine, so that elastic filling tubes are neither necessary nor desirable.

Der Erfindung liegt die Aufgabe zugrunde, eine Füllmaschine der eingangs erwähnten Art so zu verbessern, daß eine verbesserte Entleerung des Füllrohres am Ende des Füllvorganges erzielt wird.The invention has for its object to improve a filling machine of the type mentioned so that an improved emptying of the filling tube is achieved at the end of the filling process.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß das Füllrohr mit der Horizontalen einen Winkel von etwa 20° bis zu 35° einschließt und daß der Neigungswinkel des Füllrohres mit dem Neigungswinkel des Bodens des Vorratsbehälters übereinstimmt.This object is achieved in that the filling tube includes an angle of about 20 ° to 35 ° with the horizontal and that the angle of inclination of the filling tube corresponds to the angle of inclination of the bottom of the storage container.

Überraschenderweise hat es sich gezeigt, daß bei dieser unkonventionellen Ausbildung des Füllrohres ein verbessertes Fließverhalten für das pneumatisch geförderte Füllgut in dem Füllrohr entsteht, so daß deutlich weniger Ablagerungen von Füllgut in dem Füllrohr am Ende des Füllvorganges zu beobachten sind und die Stopfgrenze höher liegt, so daß das Füllrohrwesentlich weniger zum Verstopfen neigt als die bisher bekannten Füllrohre mit einem kreisförmigen Querschnitt.Surprisingly, it has been shown that with this unconventional design of the filling tube, there is an improved flow behavior for the pneumatically conveyed filling material in the filling tube, so that significantly fewer deposits of filling material can be observed in the filling tube at the end of the filling process and the stuffing limit is higher, so that the filling tube tends to clog significantly less than the previously known filling tubes with a circular cross-section.

Als Querschnittsformen kommen bei dem erfindungsgemäßen Füllrohr ein rechteckiger, halbkreisförmiger, oder elliptischer Querschnitt in Betracht.A rectangular, semicircular or elliptical cross-section can be considered as cross-sectional shapes in the filling tube according to the invention.

In einer bevorzugten Ausführungsform weist das Füllrohr die größte Breite an seinem Boden auf, was bei Füllrohren mit rechteckigem oder halbkreisförmigem Querschnitt gegeben ist. Die bevorzugte Ausführungsform ist ein Füllrohr mit einem rechteckigen Querschnitt.In a preferred embodiment, the filling tube has the greatest width at its bottom, which is the case with filling tubes with a rectangular or semicircular cross section. The preferred embodiment is a fill tube with a rectangular cross section.

In der Praxis haben sich für die überwiegende Anzahl der Anwendungsfälle optimale Ergebnisse ergeben, wenn die Innenwände des Füllrohres etwa waagerecht und lotrecht stehen. Dabei ist das Verhältnis von Breite und Höhe des Innenquerschnittes des Füllrohres vorzugweise etwa 2 : 1. Dieses Füllrohr führte im Versuch mit für eine pneumatische Förderung problematischem Füllgut zu einer Verringerung der Ablagerung von 30 % gegenüber einem Füllrohr mit einem runden Innenquerschnitt.In practice, optimal results have been obtained for the majority of applications if the inner walls of the filler pipe are approximately horizontal and vertical. The ratio of width and height of the inner cross section of the filling tube is preferably about 2: 1. In the experiment with filling material which is problematic for pneumatic conveying, this filling tube led to a reduction in the deposit of 30% compared to a filling tube with a round inner cross section.

Zur Erstellung der zur Aufnahme des Sackventils geeigneten etwa runden Außenwand kann das Füllrohr zweischalig aufgebaut sein. Der Zwischenraum zwischen den beiden Schalen kann zum Abtransport der aus dem Sack wieder entweichenden Druckluft verwendet werden. Zusätzlich kann der Boden des Füllrohres als Belüftungsboden ausgebildet werden. Dadurch kann eine Art Fließbett erzeugt werden, mit der eine eventuell im Füllrohr verbleibende Restmenge vollständig ausgetragen werden kann. Die Luftzuführungsleitungen können ebenfalls im Zwischenraum zwischen den beiden Schalen untergebracht werden. Auf die bisher üblichen, stark Staub erzeugenden Ausblaseinrichtungen mit meist unbefriedigender Restentleerung der Füllröhre kann somit verzichtet werden. In einer bevorzugten Ausführungsform ist die Außenwand durch einen Blähschlauch gebildet, der automatisch die erforderliche runde Außenwand bildet, wenn er mit Druckluft o. ä. aufgebläht wird.In order to create the approximately round outer wall suitable for receiving the sack valve, the filling pipe can be constructed with two shells. The space between the two shells can be used to remove the compressed air escaping from the sack. In addition, the bottom of the filling pipe can be designed as a ventilation floor. In this way, a type of fluidized bed can be created with which any remaining amount remaining in the filling pipe can be discharged completely. The air supply lines can also be accommodated in the space between the two shells. The previously common, heavily dust-producing blow-out devices with mostly unsatisfactory residual emptying of the filling tube can thus be dispensed with. In a preferred embodiment, the outer wall is formed by an inflation hose which automatically forms the required round outer wall when it is inflated with compressed air or the like.

Die Erfindung soll im folgenden anhand eines in der Zeichnung dargestellten Ausführungsbeispiels näher erläutert werden. Es zeigen:

  • Figur 1 - eine seitliche Ansicht einer Füllmaschine mit einer Einrichtung zur pneumatischen Förderung des Füllgutes
  • Figur 2 - einen Vertikalschnitt durch die Füllröhre der Füllmaschine aus Figur 1
  • Figur 2a - einen Querschnitt durch die Innenwände des Füllrohres mit dem sie umgebenden Blähschlauch
  • Figur 3 - eine Ansicht auf das Füllrohr gemäß Figur 2 von oben.
The invention will be explained below with reference to an embodiment shown in the drawing. Show it:
  • Figure 1 - a side view of a filling machine with a device for the pneumatic conveying of the filling material
  • 2 shows a vertical section through the filling tube of the filling machine from FIG. 1
  • Figure 2a - a cross section through the inner walls of the filling tube with the surrounding inflation hose
  • Figure 3 - a view of the filling tube according to Figure 2 from above.

Die in Figur 1 dargestellte Füllmaschine weist ein Traggestell 1 auf, an dem ein Sackstuhl 2 als Teil einer Wägeeinrichtung befestigt ist. Mit der mit dem Sackstuhl 2 bewegbaren Anordnung ist ein Füllrohr 3 verbunden. Über ein eine gewichtsmäßige Entkopplung des Füllrohres 3 von dem Traggestell 1 bewirkendes Gummistück 4 setzt sich das Füllrohr 3 bis zu einem Vorratszylinder 5 fort, in den die Fortsetzung des Füllrohres 3 mündet. Das Füllrohr 3 ist schräg nach unten geneigt, wobei seine Neigung etwa der Neigung eines Bodens 6 des Vorratszylinders 5 entspricht. Unterhalb des Bodens 6 ist eine Mehrzahl von Druckluftkammern 7 angeordnet, die mit Druckluftschläuchen 8 einzeln versorgtwerden. Über Einstellregler 9 ist der Druck in den Druckluftleitungen 8 einstellbar. Am oberen Ende des Vorratszylinders 5 befindet sich eine Absperreinrichtung 10, mit der der Vorratszylinder 5 von einer Zuführungsleitung 11 von einem (nicht dargestellten) Vorratsbunker trennbar ist.The filling machine shown in Figure 1 has a support frame 1 to which a bag chair 2 is attached as part of a weighing device. A filling tube 3 is connected to the arrangement movable with the bag chair 2. Via a rubber piece 4 effecting a decoupling of the weight of the filling tube 3 from the support frame 1, the filling tube 3 continues to a storage cylinder 5, into which the continuation of the filling tube 3 opens. The filling tube 3 is inclined obliquely downwards, its inclination roughly corresponding to the inclination of a bottom 6 of the storage cylinder 5. A plurality of compressed air chambers 7 are arranged below the bottom 6 and are supplied individually with compressed air hoses 8. The pressure in the compressed air lines 8 can be adjusted via the adjusting regulator 9. At the upper end of the storage cylinder 5 there is a shut-off device 10 with which the storage cylinder 5 can be separated from a supply line 11 from a storage bunker (not shown).

Das mit der Wägeeinrichtung verbundene vordere Ende des Füllrohres 3 ist mit dem Sackstuhl 2 übereinen Befestigungswinkel 12 verbunden, an dem gleichzeitig oberhalb des Füllrohres 3 ein Andruckstempel 13 befestigt ist, der zum Festhalten des auf das Füllrohr 3 geschobenen Ventils eines (nicht dargestellten) Ventilsackes auf dem Füllrohr 3 dient.The front end of the filling tube 3, which is connected to the weighing device, is connected to the sack chair 2 via a fastening bracket 12, to which a pressure ram 13 is attached above the filling tube 3, which is used to hold the valve of a (not shown) valve bag pushed onto the filling tube 3 serves the filling tube 3.

Die Figuren 2 und 3 verdeutlichen näher den Aufbau des Füllrohres 3 mit den an ihm angebrachten Einrichtungen. Das Füllrohr 3 ist mit einem Winkel von ca. 20° gegenüber der Horizontalen schräg nach unten zeigend an der Außenwand des Vorratszylinders 5 angebracht und mündet in diesen mit einer Durchgangsöffnung 14, die genau den Querschnitt des Füllrohres 3 aufweist. Das Füllrohr weist rechteckig aufeinanderstehende Innenwände 15 auf, wobei die Breite seines Innenquerschnitts etwa doppelt so groß ist wie die Höhe. Die den im Querschnitt waagerecht stehenden Boden bildende Innenwand 15 des Füllrohres 3 fluchtet mit dem Boden 6 des Vorratszylinders 5. Unter dem Boden 6 ist die zugehörige Druckluftkammer 7 in Figur 2 angedeutet.Figures 2 and 3 clarify the structure of the filling tube 3 with the devices attached to it. The filling tube 3 is attached at an angle of approximately 20 ° to the horizontal, pointing obliquely downward on the outer wall of the storage cylinder 5 and opens into the latter with a through opening 14 which has exactly the cross section of the filling tube 3. The filling tube has rectangular inner walls 15, the width of its inner cross section being approximately twice as large as the height. The inner wall 15 of the filling tube 3, which forms the bottom, which is horizontal in cross section, is aligned with the bottom 6 of the supply cylinder 5. Below the bottom 6, the associated compressed air chamber 7 is indicated in FIG.

Das vordere Ende des Füllrohres 3 weist den rechteckigen Innenquerschnitt auf, der in Figur 2a mit einem Schnitt entlang der Linie AB in Figur 2 verdeutlicht ist. An der Boden-Innenwand des Füllrohres 3 ist ein Schutzblech 16 trapezförmig angebracht, in dem zwei Entlüftungsleitungen 17 geführt sind. Diese Entlüftungsleitungen 17 dienen zurAbfuhr der in den Sack mit dem Füllgut gepumpten Förderluft aus dem Sack. Die Außenwand des Füllrohres 3 weist zwei ringförmig ausgebildete und voneinander beabstandete Nuten 18 auf, zwischen denen eine Kammer 19 gebildet ist. In den Nuten 18 sind zwei Enden eines Blähschlauchs 20 dichtend ringförmig festgelegt, der die Kammer 19 überspannt. In die Kammer 19 mündet eine Druckluftzuführungsleitung 21, durch die die zum Aufblähen des Blähschlauchs 20 benötigte Druckluft in die Kammer 19 gepumpt wird.The front end of the filling tube 3 has the rectangular inner cross section, which is illustrated in FIG. 2a with a section along the line AB in FIG. 2. On the bottom inner wall of the filling tube 3, a protective plate 16 is attached in a trapezoidal shape, in which two ventilation lines 17 are guided. These vent lines 17 serve to discharge the conveyed air pumped into the sack with the filling material from the sack. The outer wall of the filling tube 3 has two annularly formed and spaced apart grooves 18, between which a chamber 19 is formed. In the grooves 18 two ends of an inflation hose 20 are fixed in a ring-shaped manner, which spans the chamber 19. A compressed air supply line 21 opens into the chamber 19, through which the compressed air required to inflate the inflation hose 20 is pumped into the chamber 19.

Der bisher beschriebene Teil des Füllrohres 3 ist über den Befestigungswinkel 12 mit der Wägeeinrichtung verbunden. An ihn schließt sich zum Vorratszylinder 5 hin das weiche Gummistück 4 an, mit dem der vordere Teil des Füllrohres 3 gewichtsmäßig von dem übrigen Teil des Füllrohres 3 entkoppelt wird. Das zum Vorratszylinder 5 zeigende Teil des Gummistücks 4 ist am Traggestell 1 der Füllmaschine befestigt. Es wird durch ein weiteres Gummistück 21 fortgesetzt, das in ein festes, an der Außenwand des Vorratszylinders 5 angebrachtes Leitungsstück 22 übergeht. Die Gummistücke 4, 21 sowie das Leitungsstück 22 weisen alle den in Figur 2a dargestellten rechteckigen Innenquerschnitt auf, so daß sich ein glatter Strömungskanal mit rechteckigem Innenquerschnitt für das Füllrohr 3 bildet.The part of the filling tube 3 described so far is connected to the weighing device via the mounting bracket 12. It is followed by the soft rubber piece 4 towards the supply cylinder 5, with which the front part of the filling pipe 3 is decoupled in weight from the remaining part of the filling pipe 3. The part of the rubber piece 4 pointing towards the supply cylinder 5 is fastened to the support frame 1 of the filling machine. It is continued by a further piece of rubber 21 which merges into a fixed line piece 22 attached to the outer wall of the supply cylinder 5. The rubber pieces 4, 21 and the line piece 22 all have the rectangular inner cross section shown in FIG. 2a, so that a smooth flow channel with a rectangular inner cross section is formed for the filling pipe 3.

Das Gummistück 21 kann mittels zweier Druckkolben 23 teilweise oder ganz zusammengedrückt werden. Durch das teilweise Zusammendrücken des Gummistücks 21 wird der durch das Füllrohr 3 geleitete Füllgutstrom mengenmäßig reduziert, also ein sogenannter Feinstrom gebildet. In bekannter Weise dient der Feinstrom zur Restbefüllung des mit einem Grobstrom weitgehend gefüllten Sackes. Durch das vollständige Zusammendrücken des Gummistücks 21 wird der Förderstrom vollständig unterbrochen und die Befüllung des Sackes beendet.The rubber piece 21 can be partially or completely compressed by means of two pressure pistons 23. Due to the partial compression of the rubber piece 21, the quantity of the product passed through the filling tube 3 is reduced in quantity, that is to say a so-called fine flow is formed. In a known manner, the fine flow serves for the residual filling of the sack largely filled with a coarse flow. By completely compressing the rubber piece 21, the flow is completely interrupted and the filling of the sack is ended.

Üblicherweise wird der mit der Wägeeinrichtung verbundene vordere Teil des Füllrohres mit einem Druckluftstoß entleert. Diese Entleerung ist problematisch, da der Druckluftstoß zu einer stoßartigen Erhöhung des Druckes in dem Sack führt, wodurch die Gefahr des Zerplatzens besteht und im übrigen Füllgut durch kleinere Undichtigkeiten ausstaubt. Durch die erfindungsgemäße Ausbildung des Füllrohres 3 mit einem viereckigen Querschnitt kann der Druckluftstoß vermieden oder zumindest verringert werden.The front part of the filling pipe connected to the weighing device is usually emptied with a blast of compressed air. This emptying is problematic since the blast of compressed air leads to an abrupt increase in the pressure in the sack, which poses a risk of bursting and in the rest of the filling material is dusted by minor leaks. Due to the inventive design of the filling tube 3 with a square cross section, the compressed air blast can be avoided or at least reduced.

Die Entleerung des Füllrohres wird noch dadurch vebessert, daß der Boden des Füllrohres 3 zumindest streckenweise als Sieb ausgebildet ist, unter dem eine Druckluftleitung 25 endet (vgl. Figur 2a). Dadurch wird die Neigung des Füllgutes, sich auf dem im wesentlichen ebenen Boden abzusetzen, noch durch die durch den Siebboden 24 strömende Druckluft vermindert.The emptying of the filling pipe is further improved by the fact that the bottom of the filling pipe 3 is at least partially constructed as a sieve, under which a compressed air line 25 ends (cf. FIG. 2a). As a result, the tendency of the filling material to settle on the essentially flat floor is further increased by the sieve bottom 24 flowing compressed air is reduced.

Claims (8)

1. Filling machine with a device for pneumatic conveying of the filling material from a supply chamber (5) with an inclined floor (6) through a rigid filling pipe (3), connected fixedly to a weighing device and arranged inclined, into a valved bag pushed on to the filling pipe (3), the inner cross-section of the filling pipe (3) having a substantially larger width than height, characterized in that the filling pipe (3) makes an angle with the horizontal of appproximately 20° to 35° and in that the angle of inclination of the filling pipe (3) matches the angle of inclination of the bottom (6) of the supply chamber (5).
2. Filling machine according to claim 1, characterized in that the filling pipe (3) has its greatest width at its bottom.
3. Filling machine according to one of claims 1 to 2, characterized in that the ratio of the width to the height of the inner cross-section of the filling pipe (3) amounts to about 2 : 1.
4. Filling machine according to one of claims 1 to 3, characterized in that the inner walls (15) of the filling pipe (3) form a rectangular cross-section.
5. Filling machine according to claim 4, characterized in that the inner walls (15) in the cross-section are horizontal and vertical.
6. Filling machine according to one of claims 1 to 5, characterized in that the inner walls (15) of the filling pipe (3) are annularly surrounded by an inflatable sleeve (20).
7. Filling machine according to one of claims 1 to 6, characterized in that the bottom of the filling pipe (3) is formed as a sieve (24), under which a compressed air duct (25) terminates.
8. Filling machine according to one of claims 1 to 7, characterized in that compressed air chambers (7) are arranged below the floor (6) of the supply container (5).
EP86115872A 1985-11-15 1986-11-14 Bag-filling machine Expired - Lifetime EP0223216B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86115872T ATE42246T1 (en) 1985-11-15 1986-11-14 BAG FILLING MACHINE.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853540506 DE3540506A1 (en) 1985-11-15 1985-11-15 BAG FILLING MACHINE
DE3540506 1985-11-15

Publications (3)

Publication Number Publication Date
EP0223216A1 EP0223216A1 (en) 1987-05-27
EP0223216B1 EP0223216B1 (en) 1989-04-19
EP0223216B2 true EP0223216B2 (en) 1992-05-13

Family

ID=6286044

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86115872A Expired - Lifetime EP0223216B2 (en) 1985-11-15 1986-11-14 Bag-filling machine

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EP (1) EP0223216B2 (en)
AT (1) ATE42246T1 (en)
DE (2) DE3540506A1 (en)
ES (1) ES2008850B3 (en)
NO (1) NO864551L (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4100658C2 (en) * 1991-01-11 1995-01-05 Haver & Boecker Method and machine for introducing flowable filling material into containers
DE4239658C2 (en) * 1992-11-26 1995-10-19 Haver & Boecker Method for filling valve sacks using a filling machine
DE10258246A1 (en) * 2002-12-13 2004-07-15 Haver & Boecker Procedure for filling of valve bags has facility whereby at least one parameter ruling flowability of filling material is recorded by sensing device, whereby with deviation from set value air portion in filling material is increased
ES2763083T3 (en) * 2017-05-04 2020-05-27 Beumer Group Gmbh & Co Kg Filler tube for filling valve bags

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE614909C (en) * 1935-06-21 Carl Haver & Ed Boecker Fa Elastic filling pipe for valve bags
DE8221267U1 (en) * 1982-10-28 Haver & Boecker, 4740 Oelde Double-walled filling spout with a central filling channel
US1197877A (en) * 1913-01-10 1916-09-12 Automatic Weighing Machine Company Bag-filling apparatus.
US2879970A (en) * 1954-05-20 1959-03-31 Edric W Vredenburg Weighing mechanism
FR1439188A (en) * 1965-04-07 1966-05-20 Further training in bagging machine containers
DE2717948C2 (en) * 1977-04-22 1982-10-07 Erwin Behn Verpackungsbedarf Gmbh, 4150 Krefeld Valve bag filling device for airworthy filling material

Also Published As

Publication number Publication date
ATE42246T1 (en) 1989-05-15
DE3540506C2 (en) 1987-10-15
DE3662863D1 (en) 1989-05-24
NO864551D0 (en) 1986-11-14
ES2008850B3 (en) 1989-08-16
EP0223216A1 (en) 1987-05-27
DE3540506A1 (en) 1987-05-21
EP0223216B1 (en) 1989-04-19
NO864551L (en) 1987-05-18

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