EP0425895B1 - Dispositif de coupage et soudage transversal de bandes - Google Patents

Dispositif de coupage et soudage transversal de bandes Download PDF

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Publication number
EP0425895B1
EP0425895B1 EP90119907A EP90119907A EP0425895B1 EP 0425895 B1 EP0425895 B1 EP 0425895B1 EP 90119907 A EP90119907 A EP 90119907A EP 90119907 A EP90119907 A EP 90119907A EP 0425895 B1 EP0425895 B1 EP 0425895B1
Authority
EP
European Patent Office
Prior art keywords
web
transverse
bar
length
cutting knife
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
EP90119907A
Other languages
German (de)
English (en)
Other versions
EP0425895A1 (fr
Inventor
Uwe Köhn
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 EP0425895A1 publication Critical patent/EP0425895A1/fr
Application granted granted Critical
Publication of EP0425895B1 publication Critical patent/EP0425895B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/60—Uniting opposed surfaces or edges; Taping
    • B31B70/64—Uniting opposed surfaces or edges; Taping by applying heat or pressure
    • B31B70/645—Making seals transversally to the direction of movement
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2155/00—Flexible containers made from webs
    • B31B2155/003—Flexible containers made from webs starting from tubular webs
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents

Definitions

  • the invention relates to a device for cross-cutting and cross-welding webs made of thermoplastic material, preferably tubular webs in the manufacture of bags, with a pair of preferred rollers which advance the web clockwise by a length of web section, a preferably heated cross-cutting knife arranged parallel to a cross-welding device and two in parallel Mutually arranged lifting and lowering strips, of which the front in the feed direction as a clamping strip clamps the web end carried between the jaws of the cross-welding device against a base and the strip arranged between the cutting knife and the clamping strip clamps the web clamped between the preferred roller pair and the clamping strip before the cutting knife cuts them.
  • this object is achieved in a device of the generic type in that, after the web has been preferred, the pair of preferred rollers receives a drive movement which retracts the web during a zein interval which lies before the formation of the transverse weld seam. In the device according to the invention, the preferred pair of rollers then executes a slight retraction movement after the web has been advanced, so that the web, which may be folded or loose, is pulled taut.
  • the pair of preferred rollers feeds the web in cycles by a length that is greater than a length of the web section.
  • the retracting movement pulls the excess length back from the pair of preferred rollers, so that the web is pulled smooth.
  • the extent of the retraction movement must be matched to the excess of the preferred length.
  • the web is expediently pulled back after it is clamped by the tensioning strip. If the forward front end of the web is clamped between the tensioning bar and a base, this can be smoothly pulled back by pulling it back.
  • the web is expediently withdrawn by a length which corresponds to the difference between the feed length and the web section length.
  • the retract length can be adjusted according to the desired tension conditions.
  • the tensioning bar can tension the advanced web section already during its retraction or only after the retraction.
  • the cutting knife can already touch the web during its retraction.
  • the pair of preferred rollers consisting of the preferred rollers 1, 2 prefers a plastic tubular web 3 in cycles by one bag length.
  • the plastic tubular web 3 is clamped between them.
  • Blown air nozzles (not shown) can be provided for stretching the front end of the plastic tube web 3. If a sufficiently long piece of tubular web has now been pulled forward by the preferred rollers 1, 2, the hold-down device consisting of the clamping strip 4 lowers onto a counter bearing 5, so that the web is on the one hand between the preferred rollers 1, 2 and on the other hand between the clamping strip 4 and the counter bearing 5 or the stack of bags forming on this is clamped.
  • the tensioning bar 6 moves downward and presses the web 3 downward so strongly that it is tensioned over the groove 7 the counter pressure bar 8 sets.
  • the web 3 is then severed by lowering the upper separating knife holder 9 with the transverse cutting knife 10 attached to it. Approximately simultaneously or immediately thereafter, the bottom seam is formed by the permanently heated welding jaw pair 11.
  • the clamping bar 6 moves into an even further lowered position and thereby presses the bag separated from the web 3 onto the support bar 13 connected to the counter-pressure bar 8.
  • the welding jaws 11 can still be closed and form the transverse weld seam.
  • the support bar 13 has through holes through which needles 12 protrude upward, so that the last bag formed is needled.
  • the needles 12 are firmly connected to the angled profile of the counter bearing 5.
  • the tensioning strip 6 also has bores, so that the individual bags can be pushed onto the needles 12.
  • the indentation 14 under the groove 7 in the counter pressure bar 8 serves for the compression-free storage of the bag edges.
  • the device described here differs from the known one in that the preferred rollers 1, 2 of the preferred roller pair can be turned back by a desired and preferably adjustable amount against the preferred direction of the plastic tubular web 3 indicated by the arrow. This backward rotation of the preferred rollers 1, 2 makes the front web section which was previously carried forward freely Plastic tube sheet 3 smoothed so that it has no folds or is loose.

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  • Making Paper Articles (AREA)

Claims (6)

  1. Dispositif pour la coupe transversale de bandes en matière thermoplastique, de préférence de bandes formant gaine lors de la fabrication de sachets, comprenant une paire de galets d'avancement (1,2) faisant avancer la bande (3), en cadence, d'une longueur de tronçon de bande, un dispositif de séparation par soudage transversal comprenant un dispositif de soudage transversal (11) et un couteau de coupe transversal (10), le couteau de coupe transversal chauffé de préférence étant disposé, de préférence, parallèlement au dispositif de soudage transversal et avec deux barres (4,6) parallèles l'une à l'autre et pouvant être relevées et abaissées, dont la barre de serrage (4) avant dans la direction d'avancement serre l'extrémité de bande avancée entre les mâchoires du dispositif de séparation par soudage transversal contre un support (5) et dont l'autre barre disposée entre le couteau de coupe transversal et la barre de serrage, en tant que barre de tension (6), tend le tronçon de bande serré entre la paire de galets d'avancement et la barre de serrage avant que le couteau de coupe transversal ne sépare la bande, caractérisé en ce que la paire de galets d'avancement (1,2) après une avance de la bande (3) reçoit un mouvement d'entraînement retirant la bande pendant un intervalle de temps qui se situe avant la formation du joint soudé transversal.
  2. Dispositif selon la revendication 1, caractérisé en ce que la paire de galets d'avancement fait avancer la bande (3), en cadence, d'une longueur qui est plus grande qu'une longueur de tronçon de bande à séparer.
  3. Dispositif selon la revendication 1 ou 2, caractérisé en ce que le mouvement d'entraînement provoquant une traction en arrière a lieu après le serrage de la bande (3) par la barre de serrage (4).
  4. Dispositif selon l'une des revendications 1 à 3, caractérisé en ce que la bande (3) est retirée d'une longueur qui correspond à la différence entre la longueur de traction vers l'avant et la longueur de tronçon de bande à séparer.
  5. Dispositif selon l'une des revendications 1 à 4, caractérisé en ce que la barre de tension (6) tend la bande (3) pendant sa traction en arrière ou après la traction en arrière.
  6. Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que le couteau de coupe transversal (10) vient en contact avec la bande (3) déjà pendant sa traction en arrière.
EP90119907A 1989-11-02 1990-10-17 Dispositif de coupage et soudage transversal de bandes Expired - Lifetime EP0425895B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3936515 1989-11-02
DE3936515A DE3936515A1 (de) 1989-11-02 1989-11-02 Vorrichtung zum querschneiden und querschweissen von bahnen

Publications (2)

Publication Number Publication Date
EP0425895A1 EP0425895A1 (fr) 1991-05-08
EP0425895B1 true EP0425895B1 (fr) 1993-06-09

Family

ID=6392740

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90119907A Expired - Lifetime EP0425895B1 (fr) 1989-11-02 1990-10-17 Dispositif de coupage et soudage transversal de bandes

Country Status (5)

Country Link
US (1) US5112289A (fr)
EP (1) EP0425895B1 (fr)
CA (1) CA2029307A1 (fr)
DE (2) DE3936515A1 (fr)
ES (1) ES2045713T3 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4029440A1 (de) * 1990-09-17 1992-03-19 Windmoeller & Hoelscher Verfahren zum herstellen von kunststoffbeuteln
DE69400120T2 (de) * 1994-07-19 1996-10-10 Tabac Fab Reunies Sa Verfahren und Vorrichtung zur Herstellung von Verpackungszuschnitten
US5942076A (en) * 1997-03-13 1999-08-24 Sealed Air Corporation Inflatable cushion forming machine
DE19728371C1 (de) * 1997-07-03 1999-01-14 Lemo Maschb Gmbh Vorrichtung zum Querschweißtrennen und stapelweisen Sammeln und Verblocken von aus einer Kunststoffolienbahn hergestellten Beuteln, insbesondere Hemdchentragetaschen
NL1011809C2 (nl) * 1999-04-15 2000-10-17 Cps Case Packaging Sales Europ Inrichting voor het vervaardigen van met een gasvormig medium gevulde kussens.
CN106113584A (zh) * 2016-08-26 2016-11-16 东莞市骥发自动化设备有限公司 一种用于制袋的切刀装置
CN110102928B (zh) * 2019-06-05 2019-12-17 广州市元晟自动化科技有限公司 一种风机叶轮双枪焊接简化示教的控制系统及方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1278323B (de) * 1961-05-04 1968-09-19 Hesser Ag Maschf Vorrichtung zum Herstellen von Weichbeuteln und zu deren UEberfuehren an eine Beutelfuell- und Schliessmaschine
FR1485253A (fr) * 1966-06-30 1967-06-16 Procédé et installation pour la fabrication de sachets à partir de feuilles de polyéthylène ou similaires
BE789622A (fr) * 1971-11-12 1973-02-01 Fmc Corp Procede et appareil pour fabriquer des sacs en matiere thermoplastique soudes a leur extremite inferieure
US4101369A (en) * 1972-03-31 1978-07-18 G. T. Schjeldahl Company Bottom seal cut-off
IL47384A0 (en) * 1974-06-21 1975-07-28 Packaging Ind Inc Web handling apparatus
DE2755860C2 (de) * 1977-12-15 1979-09-20 Stiegler, Karl-Heinz, 7000 Stuttgart Maschine zum Herstellen von Schweißnähten an einer thermoplastischen Folienbahn
DE3204492A1 (de) * 1982-01-25 1983-08-18 Windmöller & Hölscher, 4540 Lengerich Vorrichtung zum querschneiden von bahnen
US5094656A (en) * 1988-11-10 1992-03-10 Fmc Corporation Servo drive bag machine

Also Published As

Publication number Publication date
US5112289A (en) 1992-05-12
DE3936515A1 (de) 1991-05-08
DE59001699D1 (de) 1993-07-15
CA2029307A1 (fr) 1991-05-08
EP0425895A1 (fr) 1991-05-08
ES2045713T3 (es) 1994-01-16

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