EP0334085B1 - Tuyère de remplissage pour machines, dispositifs et autres pour le remplissage de sacs à valve - Google Patents

Tuyère de remplissage pour machines, dispositifs et autres pour le remplissage de sacs à valve Download PDF

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Publication number
EP0334085B1
EP0334085B1 EP89103849A EP89103849A EP0334085B1 EP 0334085 B1 EP0334085 B1 EP 0334085B1 EP 89103849 A EP89103849 A EP 89103849A EP 89103849 A EP89103849 A EP 89103849A EP 0334085 B1 EP0334085 B1 EP 0334085B1
Authority
EP
European Patent Office
Prior art keywords
filling
valve
pipe
air
region
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP89103849A
Other languages
German (de)
English (en)
Other versions
EP0334085A1 (fr
Inventor
Wolfgang Schwarz
Fabien Rencurosi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Greif Werk Maschinenfabrik GmbH
Original Assignee
Greif Werk Maschinenfabrik GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Greif Werk Maschinenfabrik GmbH filed Critical Greif Werk Maschinenfabrik GmbH
Priority to AT89103849T priority Critical patent/ATE80104T1/de
Publication of EP0334085A1 publication Critical patent/EP0334085A1/fr
Application granted granted Critical
Publication of EP0334085B1 publication Critical patent/EP0334085B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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 filler neck for machines, devices or the like for filling valve bags with, in particular, powdery material, consisting of an inner tube guiding the fill material flow and a rigid outer tube surrounding the inner tube at a distance to form an air-guiding channel therebetween, the outer tube has openings in its plug-on area receiving the valve of the valve bag.
  • Such a known filler neck is described in US-A-3 118 474. It has an inner tube guiding the filling material, which is surrounded by an outer tube in the shape of a truncated cone, onto which the valve bag to be filled is attached with its valve.
  • the two tubes form an essentially closed annular space between them, the outer tube being provided with two rows of holes at the front end.
  • the annular space is closed at its rear end by a radial wall which is provided with both an air inlet socket and an air outlet socket.
  • the rows of holes opening into the annular space are completely free of valve material, so that the air from the valve bag flows unhindered into the annular space and from there via whose air discharge nozzle can be removed. If the rows of holes with filling material have clogged, a blast of compressed air is injected into the air intake Annulus given that clears the rows of holes again. Furthermore, the bag valve is not airtight on the outer tube when the valve bag hangs ready to fill on the filler neck.
  • the push-on area of the outer tube is designed such that it comprises an axial section which can be expanded in diameter. Furthermore, the air-guiding channel formed between these two tubes can be connected to a compressed air source. If a valve sack to be filled with powdery or free-flowing, usually air-fluidized, filling material has been placed on the push-on section of the filling nozzle, compressed air is directed into the named channel. The expandable section expands convexly to the outside and only comes into sealing contact with the inner wall of the valve of the bag to be filled over a short axial distance.
  • the sack has therefore been specially designed and perforated in the region of the valve in order to create an outlet for the air contained in the fluidized filling material. Nevertheless, the number of bursting bags is relatively high due to the filling pressure of the contents, because the perforation of the valve area must not exceed a certain size in order to prevent the contents of the bag from escaping, but this has not been fully achieved.
  • the object of the invention is to improve a filler neck of the type mentioned in such a way that the valve of the attached valve bag for the filling process lies closely against the filler neck for a very long distance and that the valve or the bag in the valve area does not require any further treatment after filling .
  • valve of a valve bag which is plugged onto the filler neck according to the invention it is possible for the valve of a valve bag which is plugged onto the filler neck according to the invention to lie along the entire contact between the neck and the valve over a very large axial distance, so that no filling material can penetrate into the valve during the filling process.
  • the extraordinarily good system between the filler neck and the inner wall of the valve is supported by the fact that the annular channel formed between the two tubes is subjected to negative pressure, as a result of which the inner wall of the valve is firmly sucked onto the filler neck essentially over its entire length.
  • the fact that the filler neck can be shut off means that even after the filling process has ended, no filling material continues to run from the filler neck into the bag valve when the filled sack is removed.
  • valve of the sack closes securely after being removed from the filler neck, so that there is no additional welding or gluing of the valve after filling. This in turn prevents the filling material from exiting the bag valve in the form of a small but steady stream after filling and contaminating its surroundings, including people.
  • the filling material emerges from the filling neck essentially vertically and not in a relatively coarse curve.
  • the filling cone of the filling material builds up essentially in the middle of the bag with the advantage that less free space remains in the upper part of the bag after filling, so that the bags can have a smaller height dimension with otherwise the same width and thickness due to better filling levels.
  • a better filling of the sacks results also a better stackability of the same on pallets, shelves or the like.
  • a preferred embodiment of the invention is that the openings consist of inclined slots which are provided at a distance from one another around the circumference of the outer tube, the slots extending so inclined to the longitudinal axis of the outer tube that they - seen in the axial direction of projection - with their At least adjoin the ends to form a circumferentially uninterrupted air extraction zone.
  • This configuration is very effective in suction and can be produced with little effort.
  • a further embodiment of the filler neck according to the invention is that the respective outlet end of the inner tube and the outer tube is designed in the form of a cone or a truncated cone, both the cone and the truncated cone each having in their downward-pointing region the at least one outlet opening for the filling material exhibit.
  • the outer tube advantageously also has an air suction hole.
  • the risk of a sack bursting during filling is at least substantially reduced because the air escaping from the filling material can also be discharged via the channel between the two tubes.
  • the perforation in the region of the valve can be omitted and the valve can be made simpler. There is also no longer any danger of filling material escaping from a perforation.
  • the filler neck consists of an outer tube 1 with a mounting flange 2 at its inlet end and with a suction pipe connection 3 in the vicinity of the flange and an inner tube 4, which has a smaller diameter, such that an air-conducting channel between it and the outer tube 1 5 is formed.
  • the inner tube which is arranged coaxially to the rigid outer tube, is rotatably mounted in the flange 2 and can be rotated by a certain amount by means of a cylinder 6 about the longitudinal axis 7 of the filler neck in order to close outlet openings which are still to be explained.
  • the piston rod 8 of the cylinder 6 engages a lever 9 which is rigidly attached to the inner tube 4.
  • the outer tube 1 is recessed accordingly and sealed with respect to the inner tube 4, as shown in FIG. 1.
  • the inner tube 4 and the outer tube 1 are formed in the region of their outlet end in such a way that they are otherwise closed-walled while leaving an outlet region for the filling material.
  • a cone formation 10, 11 is provided for both tubes 1,4, which are circular in cross section, the cones likewise being spaced apart from one another so that air is between them can flow.
  • the cones 10, 11 there are two outlet openings 12, 13 for the filling material, in their downward-pointing region, as can best be seen from FIG. 3.
  • cones 10, 11, truncated cones can also be provided, or any other form of training with corresponding outlet openings.
  • the cones 10, 11 or comparable designs it is also possible for the cones 10, 11 or comparable designs to be omitted and instead for the pipes in this area to be designed such that they allow a certain entry of air into the channel 5, which results from the contents of the filling nozzle hanging valve bag 14 is free, since the contents are usually conveyed fluidized in a known manner and contain a relatively large amount of air.
  • Such a possibility may consist in that a porous ring 15, e.g. made of sintered metal, is used as a blocking element, as shown in dashed lines in FIGS. 1 and 2.
  • the porous ring 15 as a blocking element if the cones 10, 11 or comparable configurations of the pipes 1, 4 are provided as a shape for the outlet end of the filler neck.
  • a hole 16 is then provided in the outer cone 10 (FIGS. 1 and 2) through which air from the valve bag 14 can enter the channel 5.
  • the porous ring 15 can also be arranged just behind the hole 16.
  • the hole 16 can also have a screen cover instead of the porous ring.
  • the above-mentioned closed wall of the outer tube 1 remains essentially through the hole 16, which only has a ventilation function.
  • the adjusting cylinder 6 causes the outlet openings 12 of this tube to be rotated relative to the outlet openings 13 of the outer tube 1 by rotating the inner tube 4 so that the openings 13 are closed. After a filling process has ended, the product is prevented from running on from the filler neck.
  • the outer tube 1 is provided with perforations in its rigid plug-on area, which is indicated in FIG. 1 and receives the valve 17 of the valve bag 14, as a result of which the valve 17 is sucked with its inner wall against this rigid area of the outer tube 1 when via the Port 3 a negative pressure is applied to channel 5. It is thus achieved that the bag valve is sucked substantially over its entire length and also tightly abuts the filler neck over this length, so that no filling material penetrates into the area between the filler neck and the bag valve during the filling process.
  • the openings extend on the one hand around the circumference of the outer tube 1 and, on the other hand, encompass an area in the axial direction which corresponds approximately to area A.
  • one possible embodiment of the openings mentioned is in the form of slots.
  • the slots 18 should at least adjoin one another — also seen in the axial projection direction — in order to form an air extraction zone which is uninterrupted in the circumferential direction, as is the case in the construction shown in FIG.
  • the slots themselves can also extend in the circumferential direction and be arranged in a row in several rows.
  • FIG. 2 another embodiment of the openings mentioned is in the form of bores 19.
  • four rows of bores 19 are provided, the bores of two rows which are adjacent to one another being offset from one another with a gap.
  • the bores are of such a size that - viewed in the axial direction of projection - the bores of at least all rows form an air extraction zone which is free from interruption in the circumferential direction.
  • the porous blocking element 15 is provided in front of the slots 18 or in front of the bores 19, as is indicated by dashed lines in FIGS. 1 and 2. This ensures that the negative pressure in the channel 5 acts first and mainly on the area A, but that to a certain extent air that escapes from the fluidized filling material can also be discharged through the hole 16 out of the attached valve bag.
  • FIG. 3 An alternative embodiment with regard to the suction of the valve 17 on the outer tube 1 and the air discharge from the sack during the filling process is that a separate air discharge path is provided for the air coming from the plugged-in sack when the element 15 is omitted, as shown in FIG. 3.
  • a pipeline 20 is provided for this purpose, which is essentially within the Inner tube 4 runs. This pipeline penetrates the inner tube 4 and the outer tube 1 in the end of the filling nozzle in the filling material outlet area and opens into the open. On the other hand, the pipeline penetrates both pipes in the vicinity of the other end of the filler neck and can be connected to an air suction source (not shown), while the duct 5 can be connected via the connection 3 to a vacuum source (not shown).
  • the filler neck described above can be used on all machines, devices or the like for filling filling material in valve bags.
  • the contents generally consist of powdery contents, preferably those from the field of construction, or of free-flowing contents.
  • powdered filling material is conveyed or filled into a valve bag in a substantially fluidized manner.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Basic Packing Technique (AREA)
  • Bag Frames (AREA)

Claims (5)

  1. Tubulure de remplissage pour machines, dispositifs ou analogues pour le remplissage de sacs à valve avec une matière de remplissage notamment pulvérulente, constituée par un tube intérieur (4) pénétrant dans le courant de la matière de remplissage et par un tube extérieur rigide (1), entourant à distance le tube intérieur, de manière à former un canal d'amenée d'air (5) entre les deux tubes, le tube extérieur (1) comportant des passages (18,19) au niveau de sa zone d'emmanchement qui loge la valve (17) du sac à valve (14), caractérisée en ce que ces passages (18,19) servent à appliquer d'une manière étanche la valve (17) du sac contre cette zone (A) en appliquant une dépression dans le canal (5) et s'étendant sur la longueur de la zone d'emmanchement (A) dans la direction axiale, du tube extérieur (1), en ce que respectivement la zone terminale de sortie du tube intérieur (4) et du tube extérieur (1) est conformée, dans la section située en amont des passages (18,19), de telle sorte que les tubes possèdent au moins une ouverture de sortie (12,13) dans leur zone tournée vers le bas et sont réalisés par ailleurs avec des parois fermées, et en ce que le tube intérieur (4) est agencé de manière à pouvoir tourner autour de son axe longitudinal (7) de manière à fermer l'extrémité de sortie de la tubulure de remplissage.
  2. Tubulure de remplissage selon la revendication 1, caractérisée en ce que les passages réalisés sous la forme de fentes (18) s'étendent en étant inclinés par rapport à l'axe longitudinal (7) du tube extérieur (1) de telle sorte qu'ils sont contigus au moins par leurs extrémités - lorsqu'on regarde dans la direction de projection axiale -, de manière à former une zone d'aspiration d'air, qui est ininterrompue dans la direction circonférentielle.
  3. Tubulure de remplissage selon la revendication 1, caractérisée en ce que la zone terminale de sortie respective du tube intérieur (4) et du tube extérieur (1) est agencée sous la forme d'un cône (10,11) ou d'un tronc de cône et en ce que le cône ou le tronc de cône possède, respectivement dans sa partie tournée vers le bas, au moins une ouverture de sortie (12,13) pour la matière de remplissage.
  4. Tubulure de remplissage suivant la revendication 1, caractérisée par le fait que le canal (5) comporte un élément de blocage (15) perméable à l'air, au niveau de l'extrémité de sortie de la matière de remplissage de la tubulure de remplissage en amont des passages (18,19).
  5. Tubulure de remplissage selon la revendication 1, caractérisée en ce qu'un trajet particulier d'évacuation de l'air (20) est prévu dans la tubulure de remplissage pour l'air qui sort de l'intérieur d'un sac à valve emmanché, et en ce que le trajet d'évacuation de l'air (20) est formé par une conduite tubulaire qui s'étend sensiblement à l'intérieur du tube intérieur (4), traverse ce dernier d'une manière étanche dans sa partie d'extrémité de sortie de la matière de remplissage et débouche à l'air libre au niveau de l'extrémité fermée du tube extérieur (1), par un passage (16) de ce tube.
EP89103849A 1988-03-22 1989-03-04 Tuyère de remplissage pour machines, dispositifs et autres pour le remplissage de sacs à valve Expired - Lifetime EP0334085B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89103849T ATE80104T1 (de) 1988-03-22 1989-03-04 Fuellstutzen fuer maschinen, vorrichtungen oder dergleichen zum fuellen von ventilsaecken.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3809593 1988-03-22
DE3809593A DE3809593A1 (de) 1988-03-22 1988-03-22 Fuellstutzen fuer maschinen, vorrichtungen oder dergleichen zum fuellen von ventilsaecken

Publications (2)

Publication Number Publication Date
EP0334085A1 EP0334085A1 (fr) 1989-09-27
EP0334085B1 true EP0334085B1 (fr) 1992-09-02

Family

ID=6350365

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89103849A Expired - Lifetime EP0334085B1 (fr) 1988-03-22 1989-03-04 Tuyère de remplissage pour machines, dispositifs et autres pour le remplissage de sacs à valve

Country Status (4)

Country Link
EP (1) EP0334085B1 (fr)
AT (1) ATE80104T1 (fr)
DE (2) DE3809593A1 (fr)
ES (1) ES2035396T3 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE9000346U1 (de) * 1990-01-13 1990-04-05 Greif-Werk Maschinenfabrik GmbH, 2400 Lübeck Füllstutzen für Füllmaschinen zum Füllen von Ventilsäcken

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2861604A (en) * 1956-05-22 1958-11-25 Volunteer Portland Cement Comp Bag filling spout
US3118474A (en) * 1961-04-18 1964-01-21 Staley Mfg Co A E Packing spout
FR1327433A (fr) * 1962-06-06 1963-05-17 Black Products Co Bec à évacuation d'air automatique
DE2058652C3 (de) * 1970-11-28 1973-09-20 Erwin Behn Verpackungsbedarf Gmbh, 4150 Krefeld Ventilsackfullmaschine mit einer Fülldüse, die an ihrer Außenseite Ent luftungskanale zum Ableiten der Luft aufweist
US4344468A (en) * 1979-06-06 1982-08-17 E. I. Du Pont De Nemours And Company Process and apparatus for packaging

Also Published As

Publication number Publication date
DE3809593A1 (de) 1989-10-12
ATE80104T1 (de) 1992-09-15
DE58902170D1 (de) 1992-10-08
ES2035396T3 (es) 1993-04-16
EP0334085A1 (fr) 1989-09-27

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