EP1667913B1 - Procede pour remplir des sacs - Google Patents

Procede pour remplir des sacs Download PDF

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Publication number
EP1667913B1
EP1667913B1 EP03740220A EP03740220A EP1667913B1 EP 1667913 B1 EP1667913 B1 EP 1667913B1 EP 03740220 A EP03740220 A EP 03740220A EP 03740220 A EP03740220 A EP 03740220A EP 1667913 B1 EP1667913 B1 EP 1667913B1
Authority
EP
European Patent Office
Prior art keywords
bag
filling
tongs
pair
gripper
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
EP03740220A
Other languages
German (de)
English (en)
Other versions
EP1667913A1 (fr
Inventor
Konrad Tetenborg
Hans-Ludwig Voss
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.)
Windmoeller and Hoelscher KG
Original Assignee
Windmoeller and Hoelscher KG
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 Windmoeller and Hoelscher KG filed Critical Windmoeller and Hoelscher KG
Publication of EP1667913A1 publication Critical patent/EP1667913A1/fr
Application granted granted Critical
Publication of EP1667913B1 publication Critical patent/EP1667913B1/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
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/42—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation
    • B65B43/46—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation using grippers
    • B65B43/465—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation using grippers for bags
    • 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
    • B65B43/00—Forming, feeding, opening or setting-up containers or receptacles in association with packaging
    • B65B43/42—Feeding or positioning bags, boxes, or cartons in the distended, opened, or set-up state; Feeding preformed rigid containers, e.g. tins, capsules, glass tubes, glasses, to the packaging position; Locating containers or receptacles at the filling position; Supporting containers or receptacles during the filling operation
    • B65B43/54—Means for supporting containers or receptacles during the filling operation

Definitions

  • the invention relates to a method and a device according to the preamble of claim 1 and 8.
  • the generic filling of sacks takes place with a variety of devices. Often, the bag to be filled during the filling process is detected by a plurality of pairs of gripper tongs. A subgroup within the filling machines form the so-called FFS machines. Here, the abbreviation FFS stands for Form Fill and Seal, so that a special characteristic of the operation of these machines lies in the welding of the bags after the filling process.
  • FFS Form Fill and Seal
  • Such a device is known inter alia from DE 199 36 660 A1.
  • the pliers of a pair of gripper tongs are first moved towards each other and opened using suction of the hose section for the purpose of lowering a hopper. Even before the start of the filling process, a second pair of gripper tongs engages the sack.
  • the sack material between the pair of gripper tongs may be subjected to different mechanical stresses than the remaining sack material, especially during the filling process.
  • the mechanical stress gradients forming in the bag material have a number of disadvantages. So can the bag material in be stretched different ways, which in particular leads to an impairment of the visual appearance of the bag. Also, the further processing of the bags, which consists in FFS machines primarily in the closing of the bags by welding, can be significantly affected. If, for example, one of the pairs of gripper tongs releases the sack after the filling process, the material relaxes again so that the upper sack edge warps. When this warped sack edge is welded, an odd welding seam is created, which in any case is visually unattractive and may even have leaks.
  • the object of the present invention is to propose a method and a device which prevent the formation of mechanical stress gradients in the bag material during filling.
  • control device present in the machine controls at least one (80) of the at least two gripper pairs (76, 80) which touch the bag to be filled during the filling process in that the at least one gripper pair (80) allows bag material to slide through its pliers within at least a period of time during the filling process.
  • the pair of gripper tongs through the forceps of which the sack material is intended to slide, is first closed with great force and thus great speed. At or immediately after the beginning of the filling process, the force closing the tongs is reduced or even eliminated taken away, so that they allow the sliding of the bag material. Furthermore, it is advantageous if, after completion of the filling process, the pliers of the aforementioned pair of gripper tongs are again closed with great force, then this pair of gripper tongs can take over immediately the removal of the bag. In this context, it is of great advantage to control the control of the closing force of the pliers depending on the level of the bag. The necessary measurement of the same can advantageously be carried out by weighing devices and / or optical sensors. In particular, with known and even course of the filling process, a calculation of the level as a function of time is conceivable.
  • Figure 1 shows a device with a relatively short length for the manufacture, filling, closing and discharge of bags made of thermoplastic material, in which all processing stations are arranged in a single machine frame.
  • a rolling device 16 for a wound up to a supply roll tubular film web of thermoplastic Plastic, preferably with gussets, arranged in a tubular film roll 18 is mounted.
  • the withdrawn from the tubular film roll 18 tubular film web 20 is cyclically pulled forward by a feed roller pair 22 via pulleys.
  • tubular film web is pulled out by a pendulum roller 28 to a web loop, which forms a web storage, from which the cyclically advanced tubular film web is withdrawn and thereby refilled during the standstill phases of the tubular film web 20 in that the pendulum roller 28 subtracts such a large portion from the supply roll 18 that the loop again receives its length storing the length of the section.
  • the pendulum roller 28 is mounted between two levers 30 mounted in the machine frame, which is cyclically pivoted by a pneumatic cylinder 31 from its pivoted-out into its pivoted position shown.
  • the feed roller pair 22 pulls the over the pulley 32 expiring tubular film web 20 in the vertical direction and pushes them between a transverse welding and cross-cutting device 34 therethrough.
  • This transverse welding and cross-cutting device has, in a manner known per se, two cooperating welding jaws and a cutting blade.
  • a coupling-forming support 40 is mounted to form a four-joint system, which is connected to an obliquely projecting Krag Federation 42, at the laterally below the opening edges of the tube sections, a first pair of gripper tongs 44 is arranged is indicated by the illustrated gripping jaws.
  • a crank rod 46 is articulated, which is reciprocated by a driven by a geared motor 48 crank 50.
  • the pivoting movement of the carrier 40 is so great that the sack portion 58 below the transverse welding and cross-cutting device 34 detecting gripper pair 44 the bag section by a stroke length along the circular arc 52 into a transfer station 54th promotes in which the gripping tongs 44 passes the bag section to a stationary gripper pair 57.
  • the pair of gripper tongs 57 is shown in the open position after the bag section has just been passed to the pair of gripper tongs 56.
  • the gripper pair 56 is supported by levers 62, 64, which are both hinged to a push rod 66 and form a four-joint system with their articulation points on the push rod and the grippers.
  • the lever 64 is a two-armed lever, the upper lever arm 68 is mounted fixed to the frame in the manner shown.
  • the push rod 66 is articulated to a two-armed frame-mounted lever 70, the upper lever arm is loaded in the manner shown by a tension spring 72.
  • the crank 50 is formed in the manner shown as a cam, wherein on this cam a mounted on the lower lever arm of the two-armed lever 70 cam roller 74 expires.
  • the push rod 66 is driven by its cam lever cam roller drive such that the gripper pair 56 passes the bag section leading to a pair of gripper tongs 76.
  • the pair of gripper tongs 76 engages laterally on the opening areas of the bag sections below the filling funnel 78. To open the bag section 58, both pliers of the pair of gripper tongs 76 move towards each other. At the same time, the teat couple 118 pivots over a pneumatic piston cylinder arrangement 116. As a result, the bag is pulled out laterally in the filling station in order to be able to receive the filling hopper 78 after lowering.
  • a further pair of gripper tongs 80 is arranged, which acts with great force on the bag section before the filling process, wherein the tongs have already been moved inwardly along the direction a.
  • the force applied to the forceps of the gripper pair 80 is withdrawn, so that during the Be Glallvorganges the bag section 58 can slide through the pliers.
  • the pliers of the gripper pair 80 again grip with high force on the now tightened by the contents in the vertical direction bag section 58.
  • the opening edges of the filled bag are tightened in direction a and transferred to a welding station 82, in the one in Fig. 4, not shown welding jaw pair closes the tightly drawn opening edges of the bag with a transverse weld.
  • a discharge belt 86 provided with lugs 84 is arranged, which runs over end drive and deflection rollers 88, 90 and removes the filled sacks 92 from the filling and welding stations 60, 82 in time with their filling.
  • the drive and deflection rollers 88, 90 of the conveyor belt 86 are mounted at the ends of a horizontal support 94 which can be raised and lowered in frame-fixed guides 96 by a spindle drive 98, the spindle drive 98 is driven by a geared motor 100.
  • Fig. 3 the filling station 60 is shown. Between the side parts 12 and 14, the conveyor belt 94 is arranged with its guide roller 88. On the conveyor belt 94, as already described, lugs 84 are arranged. Between the hopper 78 and the conveyor belt 94, a bag 58 which is still standing before its filling is arranged. This is held in the time shown here at the same time by the gripper pairs 80 and stationary arranged in the filling station Greiferzangenzipen 76. For gripping the gusset regions 59 of the sack 58 or for releasing the pair of gripper tongs from the gusset region 59, the gripper tongs 80 are displaced over the double knives 106 in the direction of the arrow a.
  • the stationary gripper pair of pairs 76 need not be opened by 180 ° to grip the upper bag end of the bag 58.
  • the necessary opening movement of the respective pair of forceps 102 and 104 of the stationary Claw pair 76 can be explained with reference to FIG. 2.
  • the pair of gripper tongs 102 is arranged rigidly vertically downwards, as can be seen from the illustration according to FIG.
  • the claw pair 104 which can be brought into clamping engagement with this clamping device can be pivoted open via a pneumatic piston cylinder arrangement 108, wherein the pivoting angle only encloses an acute angle. This results in a comparatively small receiving opening of the gripper pairs.
  • the fourth pair of gripper tongs 56 sweeps over a transport path 110 illustrated in phantom in FIG. 2, in which the delivery position for delivering the sack 58 to the pair of gripper tongs 76 fixedly arranged at the filling station a level which is arranged higher by a distance x than its transfer position 54 for the bag 58.
  • This height difference x is shown in FIG.
  • this gripper pair 80 After filling the bag 58, this is gripped by the gripper pair 80, as shown in Fig. 4, below the gripper pair 76 (Fig. 3). Also, this gripper pair is again, similar to the gripper pair 76, in the direction of arrow a of FIG. 3 laterally adjustable.
  • the upper edge region ie the area of the bag above the transport gripper pairs 80, the fixed jaws 102 of Greiferzangenpare 76, as shown in Fig. 2 by the dotted drawing shown, dodge. Due to the elasticity of the plastic and the restoring force caused thereby, however, this upper edge region arises again, as likewise shown in the drawing.
  • the bag which simultaneously rests on the conveyor belt 94 and is moved further along it, is then pivoted along the dotted line 112 via the transport gripper pair 80, this line representing the unimpeded movement path for the uppermost edge region of the bag 58.
  • the sack 58 occupies a position in the welding station 82 which lies below the position in the filling station 60 by a height difference x (see Fig. 4).
  • a height difference x see Fig. 4

Claims (10)

  1. Procédé pour remplir des sacs:
    - avec un dispositif avec plusieurs paires de pinces de préhension (44, 57, 76, 80),
    - dont au moins deux paires de pinces de préhension (76, 80) viennent en contact pendant le processus de remplissage avec le sac (58) à remplir et
    - un dispositif de commande qui commande le processus de remplissage et de transport des sacs,
    caractérisé en ce que
    le dispositif de commande commande au moins l'une (80) des au moins deux paires de pinces de préhension (76, 80), qui viennent en contact pendant le processus de remplissage avec le sac à remplir, de telle sorte qu'au moins une paire de pinces de préhension (80) permet à l'intérieur d'au moins un laps de temps pendant le processus de remplissage que le matériau du sac glisse à travers ses pinces.
  2. Procédé selon la revendication 1, caractérisé en ce qu'au moins une paire de pinces de préhension (80), qui permet que le matériau de sac glisse à travers ses pinces, saisit le sac (58) pendant le processus de remplissage en dessous de la ou des paires de pinces de préhension (76) qui fixent le sac.
  3. Procédé selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande ferme au moins une paire de pinces de préhension (80), qui permet que le matériau de sac glisse à travers ses pinces, au
    début du processus de remplissage d'abord avec une grande force.
  4. Procédé selon l'une des revendications précédentes, caractérisé en ce que le dispositif de commande ferme au moins une paire de pinces de préhension (80), qui permet que le matériau de sac glisse à travers ses pinces, à la fin du processus de remplissage à nouveau avec une grande force.
  5. Procédé selon la revendication 4, caractérisé en ce qu'au moins une paire de pinces de préhension (80), qui permet que le matériau de sac glisse à travers ses pinces, assure après le processus de remplissage le transport ultérieur du sac.
  6. Procédé selon la revendication 4 ou 5, caractérisé en ce que le dispositif de commande commande l'instant, auquel il ferme les pinces à nouveau avec une grande force, d'après l'état de remplissage du sac (58).
  7. Procédé selon la revendication 6, caractérisé en ce que le dispositif de commande détermine l'état de remplissage du sac avec une balance et/ou un capteur optique.
  8. Dispositif pour remplir des sacs avec les caractéristiques suivantes:
    - avec plusieurs paires de pinces de préhension (44, 57, 76, 80),
    - dont au moins deux paires de pinces de préhension (76, 80) viennent en contact pendant le processus de remplissage avec le sac à remplir (58) et
    - un dispositif de commande qui commande le processus de remplissage et de transport des sacs,
    caractérisé en ce que
    le dispositif de commande commande au moins l'une (80) des au moins deux paires de pinces de préhension (76, 80) qui, pendant le processus de remplissage, viennent en contact avec le sac à remplir, de telle sorte qu'au moins une paire de pinces de préhension (80) permet à l'intérieur d'au moins un laps de temps pendant le processus de remplissage que le matériau de sac glisse à travers ses pinces.
  9. Dispositif selon la revendication 8, caractérisé par des capteurs optiques et/ou des balances pour surveiller l'état de remplissage du sac pendant le remplissage.
  10. Dispositif selon la revendication 7 ou 8, caractérisé par une station de soudage qui ferme le sac rempli.
EP03740220A 2003-06-06 2003-06-06 Procede pour remplir des sacs Expired - Lifetime EP1667913B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2003/006112 WO2004108536A1 (fr) 2003-06-06 2003-06-06 Procede pour remplir des sacs

Publications (2)

Publication Number Publication Date
EP1667913A1 EP1667913A1 (fr) 2006-06-14
EP1667913B1 true EP1667913B1 (fr) 2007-02-14

Family

ID=33495521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03740220A Expired - Lifetime EP1667913B1 (fr) 2003-06-06 2003-06-06 Procede pour remplir des sacs

Country Status (6)

Country Link
EP (1) EP1667913B1 (fr)
AT (1) ATE353825T1 (fr)
AU (1) AU2003304176A1 (fr)
DE (1) DE50306549D1 (fr)
ES (1) ES2279958T3 (fr)
WO (1) WO2004108536A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ITMI20051142A1 (it) * 2005-06-17 2006-12-18 Concetti Spa Apparecchiatura di trasporto di sacchi per macchine di formatura e riempimento degli stessi.
DE102013105556B4 (de) * 2013-05-29 2017-05-18 Windmöller & Hölscher Kg Klemmvorrichtung für das Klemmen eines Sackabschnitts einer Folienbahn in einer Füllstation einer Sackfüllanlage
CN115477027B (zh) * 2022-10-25 2023-06-30 中铁九局集团第一建设有限公司 一种生态草灌袋的自动装填设备

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19936660C2 (de) 1999-05-04 2002-10-24 Windmoeller & Hoelscher Vorrichtung zum Herstellen, Befüllen und Verschließen von Säcken
DE10217397B4 (de) * 2002-04-18 2007-09-13 Windmöller & Hölscher Kg Verfahren und Vorrichtung zum Befüllen von Säcken

Also Published As

Publication number Publication date
ES2279958T3 (es) 2007-09-01
DE50306549D1 (de) 2007-03-29
EP1667913A1 (fr) 2006-06-14
AU2003304176A1 (en) 2005-01-04
ATE353825T1 (de) 2007-03-15
WO2004108536A1 (fr) 2004-12-16

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