EP2772443B1 - Flusssteuerungsvorrichtung für pulverförmiges material zum füllen eines beutels und entsprechende füllmaschine und füllverfahren für beutel - Google Patents

Flusssteuerungsvorrichtung für pulverförmiges material zum füllen eines beutels und entsprechende füllmaschine und füllverfahren für beutel Download PDF

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Publication number
EP2772443B1
EP2772443B1 EP14154615.0A EP14154615A EP2772443B1 EP 2772443 B1 EP2772443 B1 EP 2772443B1 EP 14154615 A EP14154615 A EP 14154615A EP 2772443 B1 EP2772443 B1 EP 2772443B1
Authority
EP
European Patent Office
Prior art keywords
bag
screw conveyors
powdered material
housing
outlet port
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.)
Not-in-force
Application number
EP14154615.0A
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English (en)
French (fr)
Other versions
EP2772443A1 (de
Inventor
Joan Caba Muntada
Xavier Arderiu Cabau
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.)
Tecnicas Mecanicas Ilerdenses SL
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Tecnicas Mecanicas Ilerdenses SL
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Publication of EP2772443A1 publication Critical patent/EP2772443A1/de
Application granted granted Critical
Publication of EP2772443B1 publication Critical patent/EP2772443B1/de
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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
    • B65B1/10—Methods of, or means for, filling the material into the containers or receptacles by rotary feeders
    • B65B1/12—Methods of, or means for, filling the material into the containers or receptacles by rotary feeders of screw type
    • 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
    • B65B1/28—Controlling escape of air or dust from containers or receptacles during filling
    • 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
    • B65B1/30—Devices or methods for controlling or determining the quantity or quality or the material fed or filled
    • B65B1/32—Devices or methods for controlling or determining the quantity or quality or the material fed or filled by weighing

Definitions

  • the invention relates to a powdered material flow control device for filling a bag comprising a first screw conveyor for transporting said material according to claim 1.
  • the invention also relates to a machine including said flow control device, as well as a process for filling bags using said device.
  • FFS form, fill and seal
  • Net weight measuring consists of providing a load sensor in the hopper for filling the bag.
  • the hopper is filled, for example, by means of a conveyor belt. In this way the weight of material with which it is desired to fill the bag is determined from the hopper and when the metered amount is ready, the hopper is opened and it is allowed to fall into the bag.
  • a conveyor belt allows the powdered material to fall and the end weight measurement is performed on the bag itself.
  • the weight sensor is provided in the hopper containing all the powdered material, starting out from a known amount of material.
  • pouring of the material through the hopper mouth is started and the weight loss in the hopper is monitored.
  • a cover closes the hopper mouth.
  • Fluidization of a powdered material consists on aeration or the incorporation of air experimented by the material due to its own movement and having as a consequence an increase in the volume thereof and it behaving similarly to a fluid. This leads to the material occupying a greater volume within the bag than would be desirable.
  • the bags to be filled with powdered material usually have a three-dimensional form such that once they are filled it is close to an orthohedron having a rectangular cross section twice as wide as it is deep. This shape is particularly appropriate for palletizing full bags. Then, if the material is highly fluidized, the bag loses volume with the passage of time and becomes emptier, whereby it loses its approximately orthohedron shape and is thus harder to palletize, since it easily deforms.
  • Document US 2008/0115462 A1 shows an FFS machine having a metering and weighing system for pasty materials containing water, such as for example mixtures of plaster and water ready for use.
  • a first coarse filling screw conveyor and a second smaller diameter screw conveyor for the fine filling both being vertically arranged. Both screw conveyors can rotate simultaneously to fill the bag more quickly, but the final filling is carried out by the fine filling screw conveyor. This causes irregularity in the flow falling in the bag.
  • a sensor is provided in this system which weights the bag to determine the gross weight.
  • Document CN 2795035 U shows a device for filling bags with powdered material in which two screw conveyors are provided for the simultaneous horizontal filling of two bags. To this end, the screw conveyors share a single material supply hopper which is separated into two independent chambers, one for each bag.
  • Document GB 413,214 relates to an apparatus for supplying material to bags or other containers substantially for the purpose of manufacturing packages containing pulverulent, granular, flaky or plastic substances, especially flour or the like.
  • the flow can be controlled since the entrained volume of powdered material is known at all times and is regular and foreseeable at all times due to the synchronization of both screw conveyors.
  • the outlet port compacting takes place which helps to reduce the aeration of the material and therefore precludes fluidization.
  • the housing is adapted to the shape of the bag mouth is the cause that, with the powdered material falling under its own weight in a relatively compacted form, the bag is uniformly filled across the whole width thereof, considerably reducing any possible aeration, which improves the compacted filling of the bag in a simple way. This leads to the filling producing a substantially parallelepipedic bag, thereby facilitating palletizing.
  • the invention further includes a number of preferred features that are object of the dependent claims and the utility of which will be highlighted hereinafter in the detailed description of an embodiment of the invention.
  • said housing defines at least one longitudinal channel separate from said inner chamber for the passage of handling mechanisms extending up to said outlet port. In this way a much more compact device is achieved.
  • said first and second screw conveyors have the same spirals and directions of rotation and alternatively said first and second screw conveyors have opposite spirals and directions of rotation.
  • said handling mechanisms comprise at least one of an air suction device at the top end of the bag, or a vacuum generator device within mass of the bagged powdered material.
  • said housing has a cross section twice as wide as it is deep.
  • the invention also relates to a bag filling machine comprising between said metering device and said bag it comprises a powdered material flow control device according to the invention.
  • the invention relates to a process for filling bags with a powdered material solving the problem of fluidization in a simple way.
  • the process comprises following steps: [a] determining a metered amount of powdered material with which it is desired to fill a bag, [b] pouring said metered amount into the hopper of a powdered material flow control device comprising adjacent first and second screw conveyors, said first and second screw conveyors being arranged vertically, and at least in part, inside a housing defining an inlet port, a outlet port for said material and a common inner chamber, and said first and second screw conveyors having dimensions such that said housing is externally snugly adapted to the cross section of the bag, and [c] rotating said first and second screw conveyors synchronously to discharge said powdered material through said outlet port.
  • said housing has a cross section twice as wide as it is deep.
  • Figures 1 to 5 show a first embodiment of the powdered material flow control device 1 according to the invention.
  • This device 1 may be mounted both in FFS machines and in machines for preformed bags.
  • the device 1 has an upper hopper 14 containing the powdered material in bulk, in spite of the material not being shown in the Figures.
  • the hopper 14 contains the premetered amount with which the flow is regulated to fill the bag 100.
  • the first and second screw conveyors 2, 4 are only partly arranged in the housing 6, since they are partly inside the hopper 14 to be able to start the entrainment of powdered material downwards.
  • the housing 6 has an inlet port 8, and a outlet port 10 delimiting a common inner chamber 12 through which the powdered material is caused to descend.
  • the first and second screw conveyors 2, 4 are dimensioned such that the housing 6 enveloping them is snugly adapted to the generally rectangular cross section of the bag 100.
  • the bags 100 usually have a bellows shape on their shorter sides 104, which substantially improves filling, since the material forces the bag to take on a parallelepipedic shape facilitating palletizing thereof.
  • the fact that the housing 6 is adapted to the cross section of the bag 100 substantially reduces the entry of air. Nevertheless, it is not essential for the invention for the bag 100 to be completely open, forming a rectangular inlet mouth.
  • first and second screw conveyors 2, 4 rotate at synchronized speeds thanks to corresponding servo motors 24 schematically shown in Figure 2 , which allows the flow to be uniformly controlled.
  • the first and second screw conveyors may share one same servo motor.
  • the material cannot fall irregularly or in spurts, which would facilitate its entraining air.
  • the outlet port 10 substantially fills the whole width and depth of the cross section of the bag 100.
  • the powdered material falls by gravity, it falls spreading itself over practically the whole of the bag 100 bottom. This prevents the formation of a single central heap, like the one that forms in the state of the art machines having a single central screw conveyor. Also, in comparison with the gravity filling machines, the fall of the material is fully controlled.
  • the housing 6 snugly envelops the first and second screw conveyors 2, 4.
  • the housing 6 follows a wedge form with the side walls 28 thereof following the profile of the screw conveyors.
  • a second wall 26 as a second envelope a longitudinal channel 16 separate from the inner chamber 12 is formed for the passage of handling mechanisms extending to said outlet port 10. Since it is isolated from the inner chamber 12, this channel 16 allows mechanisms which conventionally are separate to be integrated in the housing and therewith a very compact device 1 is achieved.
  • a suction device 18 for the air gathering at the top end of the bag 100.
  • the purpose of this device consists of removing the air gathering at the top of the bag, above the powdered material, before closing, thereby to reduce the total volume of the closed bag and improve palletizing.
  • a vacuum generating device 20 is provided with a filter. In a first embodiment it may project from the housing 6 and extend downwardly into the mass of the bagged powdered material. Then, the device 20 sucks within the powdered material to cause a vacuum in the interior thereof and again improve the palletizing of the product. Thanks to the filter, there is avoided the loss of material inside the vacuum generating device 20.
  • the vacuum generating device 20 may operate at the level of the outlet port of the housing 6, to produce the vacuum before the material falls into the bag 100.
  • the pitch of the screw conveyors 2, 4 decreases towards said outlet port.
  • first and second screw conveyors 2, 4 have the same spiral and direction of rotation but, nevertheless, these first and second screw conveyors 2, 4 can have opposite spirals and directions of rotation.
  • activatable rods 22 have been caused to extend through the channels 16 and are provided at the lower end thereof with a cover 30 for closing the outlet port 10 of the housing 6 to interrupt the fall of material when, for example, the hopper 14 is refilled with a new metered amount for filling the bag 100.
  • FIG. 6 schematically shows a first embodiment of a bagging machine according to the invention.
  • a conveyor belt 110 for supplying the powdered material 112 to a metering device 106.
  • the machine has a net weight system.
  • the metering device 106 has a weight sensor 108 for determining the amount with which the bag 100 is to be filled. Once the amount has been correctly determined, the gates 114 of the metering device are opened and the material falls under its own weight into the hopper 14.
  • the measured amount inside the hopper 14 is caused to feed through the adjacent first and second screw conveyors 2, 4 vertically downwards thanks to a step in which the first and second screw conveyors 2, 4 are rotated at a synchronized speed to discharge the powdered material through said outlet port 10.
  • the process may also comprise the steps of sucking the air from the top of the bag 100 before closure, or the step of generating a vacuum in the powdered material, either before leaving the outlet port 10 or once inside the bag 100.
  • Figure 7 shows a second embodiment in the case of a bagging machine with weight determination by weight loss.
  • the machine has a silo 116 containing a large amount of powdered material.
  • the weight sensor 108 is associated with the silo 116.
  • the gates 114 are opened and the material is allowed to fall by gravity.
  • the sensor 108 determines the drop in weight in the silo 116 and closes the gates as soon as the desired measured amount has been reached. From here on the flow control is carried out in the same way as in the embodiment of Figure 6 .
  • Figures 8 to 11 show a second embodiment of the flow control device of the invention.
  • the only substantial difference relative to the embodiment of Figures 1 to 5 is that instead of a cover 30 for blocking the outlet port 10 having a longitudinal movement, it has two tilting semi covers 32, hinged to the housing 6 to block the port 10.
  • the device 1 has the same features as those described above.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quality & Reliability (AREA)
  • Basic Packing Technique (AREA)
  • Supply Of Fluid Materials To The Packaging Location (AREA)

Claims (9)

  1. Flusssteuerungsvorrichtung für pulverisiertes Material zum Befüllen eines Beutels (100), umfassend einen ersten Schneckenförderer (2) zum Transportieren des Materials, und einen zweiten Schneckenförderer (4), benachbart zu dem ersten Schneckenförderer (2), wobei die ersten und zweiten Schneckenförderer (2, 4) vertikal und zumindest teilweise innerhalb eines Gehäuses (6), das eine Einlassöffnung (8), eine Auslassöffnung (10) für das Material und eine gemeinsame innere Kammer (12) definiert, angeordnet sind, wobei die ersten und zweiten Schneckenförderer (2, 4) Dimensionen aufweisen, so dass das Gehäuse (6) extern an den Querschnitt des Beutels (100) gut passend angepasst ist, wobei die ersten und zweiten Schneckenförderer (2, 4) bei einer synchronisierten Geschwindigkeit rotieren, und das Gehäuse (6) mindestens einen längslaufenden Kanal (16), getrennt von der inneren Kammer (12), in dem Bereich, wo die ersten und zweiten Schneckenförderer (2, 4) benachbart zueinander sind, definiert, dadurch gekennzeichnet, dass die Vorrichtung ferner Handhabungsmechanismen umfasst, die durch den mindestens einen längslaufenden Kanal (16) durchführen und sich bis zu der Auslassöffnung (10) ausdehnen.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass die Steigung der Schneckenförderer hin zu der Auslassöffnung abnimmt.
  3. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die ersten und zweiten Schneckenförderer (2, 4) dieselben Wendeln und Rotationsrichtungen aufweisen.
  4. Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die ersten und zweiten Schneckenförderer (2, 4) entgegengesetzte Wendeln und Rotationsrichtungen aufweisen.
  5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Handhabungsmechanismen eine Luftansaugvorrichtung (18) an dem oberen Ende des Beutels und/oder eine Vakuumerzeugungsvorrichtung (20) in der Masse des eingetüteten pulverisierten Materials umfassen.
  6. Vorrichtung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Gehäuse (6) einen Querschnitt aufweist, der doppelt so breit ist wie er tief ist.
  7. Maschine zum Befüllen von Beuteln (100), die eine Messvorrichtung (106) zum Messen einer abgemessenen Menge von pulverisiertem Material umfasst, dadurch gekennzeichnet, dass sie zwischen der Messvorrichtung (106) und dem Beutel (100) eine Flusssteuerungsvorrichtung (1) für pulverisiertes Material nach einem der Ansprüche 1 bis 6 umfasst.
  8. Verfahren zum Befüllen von Beuteln mit einem pulverisierten Material, dadurch gekennzeichnet, dass es die folgenden Schritte umfasst:
    [a] Feststellen einer gemessenen Menge von pulverisiertem Material mit welchem es gewünscht ist, einen Beutel (100) zu befüllen,
    [b] Schütten der gemessenen Menge in den Trichter (14) einer Flusssteuerungsvorrichtung (1) für pulverisiertes Material, die benachbarte erste und zweite Schneckenförderer (2, 4) umfasst, wobei die ersten und zweiten Schneckenförderer (2, 4) vertikal und zumindest teilweise innerhalb eines Gehäuses (6), das eine Einlassöffnung (8), eine Auslassöffnung (10) für das Material und eine gemeinsame innere Kammer (12) definiert, angeordnet sind, und die ersten und zweiten Schneckenförderer (2, 4) Dimensionen aufweisen, so dass das Gehäuse (6) extern an einen Querschnitt des Beutels (100) gut passend angepasst ist,
    [c] synchrones Rotieren der ersten und zweiten Schneckenförderer (2, 4), um das pulverisierte Material durch die Auslassöffnung (10) abzulassen, und
    [d] wobei das Gehäuse (6) mindestens einen längslaufenden Kanal (16), getrennt von der inneren Kammer (12), in dem Bereich, wo die ersten und zweiten Schneckenförderer (2, 4) benachbart zueinander sind, definiert,
    dadurch gekennzeichnet, dass
    Handhabungsmechanismen durch den mindestens einen längslaufenden Kanal (16) durchgeführt sind, die sich bis zu der Auslassöffnung (10) ausdehnen.
  9. Verfahren nach Anspruch 8, dadurch gekennzeichnet, dass das Gehäuse (6) einen Querschnitt aufweist, der doppelt so breit ist wie er tief ist.
EP14154615.0A 2013-02-11 2014-02-11 Flusssteuerungsvorrichtung für pulverförmiges material zum füllen eines beutels und entsprechende füllmaschine und füllverfahren für beutel Not-in-force EP2772443B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201330173A ES2421062B1 (es) 2013-02-11 2013-02-11 Dispositivo de regulación de flujo de un material pulverulento para llenar un saco y máquina y procedimiento de llenado de sacos correspondientes

Publications (2)

Publication Number Publication Date
EP2772443A1 EP2772443A1 (de) 2014-09-03
EP2772443B1 true EP2772443B1 (de) 2016-08-17

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ES2675030T3 (es) * 2014-07-08 2018-07-05 Gima S.P.A. Unidad y método para el llenado de elementos contenedores de cápsulas de un solo uso para bebidas de extracción o infusión
KR101954872B1 (ko) * 2017-02-09 2019-03-06 주식회사 천마하나로 커피 캡슐용 커피 분말의 자동 충진 장치
CN110329557A (zh) * 2019-06-12 2019-10-15 安徽省神草堂国药有限公司 一种破壁中药加工灌装设备
CN110272006B (zh) * 2019-06-13 2024-03-08 江苏可奥熙光学材料科技有限公司 一种光学树脂单体用在线灌装装置
WO2022118152A1 (en) * 2020-12-01 2022-06-09 Color Service S.R.L. Dosing station of a powder product in a container, as well as method and software for dosing this product and packaging plant thereof
IT202000029162A1 (it) * 2020-12-01 2022-06-01 Color Service Srl Stazione di dosaggio di un prodotto in polvere in un contenitore, nonche’ metodo e software di dosaggio di tale prodotto ed impianto di confezionamento dello stesso
CN112660435A (zh) * 2020-12-14 2021-04-16 新沂市中明包装有限公司 一种全自动颗粒料包装机
CN114715449B (zh) * 2022-04-18 2022-11-18 兴化市三圆锌品有限公司 一种氧化锌自动装袋设备
CN117438206B (zh) * 2023-11-15 2024-06-14 南通悦立磁业有限公司 一种宽温低功耗锰锌铁氧体粉料的制备装置

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GB129633A (en) * 1918-07-11 1920-10-04 Richard Leumann Improvements in or relating to Controlling Devices for Charging Hoppers.
GB413213A (en) * 1933-01-12 1934-07-12 Gerh Arehns Mek Verkst Ab Machine for manufacturing packages containing pulverulent or other material
GB413214A (en) * 1933-01-12 1934-07-12 Gerh Arehns Mek Verkst Ab Apparatus for supplying material to bags or other containers
DE2555347A1 (de) * 1975-12-09 1977-06-30 Celcommerz Inh Felix Rettenmai Sackpackpresse zum entlueften und verdichten von pulverfoermigen und feinkoernigen produkten (z.b. mehle) die rasch in saecke (z.b. plastiksaecke oder papiersaecke) abgefuellt werden
JPH04253601A (ja) * 1991-01-24 1992-09-09 Nakajima Seisakusho:Kk 高密度粉粒体の送給装置
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Publication number Publication date
ES2421062B1 (es) 2014-10-30
EP2772443A1 (de) 2014-09-03
ES2421062A1 (es) 2013-08-28
ES2600777T3 (es) 2017-02-10

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