EP0377416B1 - Installation pour la fabrication en continu de sacs en utilisant du polypropylène, polythène, PVC ou matériaux plastiques similaires - Google Patents

Installation pour la fabrication en continu de sacs en utilisant du polypropylène, polythène, PVC ou matériaux plastiques similaires Download PDF

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Publication number
EP0377416B1
EP0377416B1 EP89830531A EP89830531A EP0377416B1 EP 0377416 B1 EP0377416 B1 EP 0377416B1 EP 89830531 A EP89830531 A EP 89830531A EP 89830531 A EP89830531 A EP 89830531A EP 0377416 B1 EP0377416 B1 EP 0377416B1
Authority
EP
European Patent Office
Prior art keywords
roll
plant
film
bags
rolls
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
EP89830531A
Other languages
German (de)
English (en)
Other versions
EP0377416A1 (fr
Inventor
Ermes Ollari
Giorgio Bragaglia
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.)
Generatori Elettronici Alta Frequenza Geaf Srl
Original Assignee
Generatori Elettronici Alta Frequenza Geaf Srl
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 Generatori Elettronici Alta Frequenza Geaf Srl filed Critical Generatori Elettronici Alta Frequenza Geaf Srl
Priority to AT89830531T priority Critical patent/ATE91250T1/de
Publication of EP0377416A1 publication Critical patent/EP0377416A1/fr
Application granted granted Critical
Publication of EP0377416B1 publication Critical patent/EP0377416B1/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
    • 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
    • B31B2155/001—Flexible containers made from webs by folding webs longitudinally
    • 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
    • B31B2155/001—Flexible containers made from webs by folding webs longitudinally
    • B31B2155/0014—Flexible containers made from webs by folding webs longitudinally having their openings facing 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
    • B31B2160/00—Shape of flexible containers
    • B31B2160/10—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents
    • 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
    • B31B2160/106—Shape of flexible containers rectangular and flat, i.e. without structural provision for thickness of contents obtained from sheets cut from larger sheets or webs before finishing the bag forming operations

Definitions

  • the present invention relates to plant for the continuous cycle manufacture of bags fashioned in polypropylene, polythene, PVC and similar plastic materials.
  • the prior art embraces a variety of systems for the formation of plastic bags by heat-sealing, all of which are intermittent in operation insofar as they involve indexing previously cut and folded sheets of plastic film, generally on a conveyor belt, into a heat-seal station that consists in a vertically reciprocating plate disposed transversely to the path of the conveyor, the film material being held motionless at the station until such time as two, three or four sides have been fused together to form the bag.
  • a further drawback experienced with indexing type systems is that waste is generated, as a transverse strip of the film has to be trimmed away in order to provide an opening for the bag and ensure a tidy finish.
  • US-A-2 866 392 shows means to manufacture pouches of cellophane or the like, comprising a folding station, at least a sealing station having electrically heated roller-carried sealing irons, and a cutting station having a roller-carried blade cooperable with a fixed blade.
  • a problem of the sealing station is that the plastic film has a direct contact with the heated irons and, moreover, there is not an efficient device for cooling the heat-sealed film.
  • US-A-4 599 926 discloses a die-cutting roll to cut holes in traveling web materials and to drive the fragments or the waste inwardly under vacuum through an axial passage inside the roll.
  • the object of the present invention is to provide plant for the continuous cycle manufacture of bags using one or more reels of film, or alternatively, and by virtue of this same capacity for continuous production, operating in combination with a chill-(or ( cast-) roll facility of the type which produces film by continuous extrusion.
  • a further object of the invention is to step up the number of bags turned but per hour by the plant, without jeopardizing quality.
  • Another object of the invention is to reduce the quantity of waste generated in manufacture.
  • the folding device 5 serves to double up the film into two identical sandwiched layers, denoted 6, which are fed between two guide rollers 7 and then passed around a roller denoted 8, this in its turn flanked by a pressure roller 8a the purpose of which is to flatten the fold and align the running film in readiness for its passage through a set of units, or stations, to which the present invention effectively relates.
  • the heat-seal station 11 comprises a top roll 12 and a bottom roll 13, both of which are driven by a belt 14 looped around two pulleys 15 and 16 keyed to the respective shafts 17 and 18 of the rolls 12 and 13.
  • the belt 14 is kept taut by a tensioner 19, and turned by a pulley 20 set in rotation by a bevel gear pair 21 in receipt of drive from a shaft 22 coupled to a geared motor 23 (see fig 2).
  • the roll shafts 17 and 18 are embodied hollow in order to accommodate wires 24 supplying electrical power to resistances 25 by which the rolls 12 and 13 are heated.
  • the resistances 25 are arranged in two parallel and laterally positioned circumferential elements 26 and 27 by means of which to produce a pair of continuous longitudinal seams along the folded outer edges of the running film, and one transverse element 28 by means of which to produce a seam across the film.
  • the shafts 17 and 18 are supported by bearings 29 and 29a carried in journal blocks 30 and 31 made fast to two respective rails 32 and 33 which are mounted slidably to columns 34.
  • Each column 34 is part-threaded in such a way as to accept two lock nuts 37 which impinge on relative sleeves denoted 38; in effect, it is these sleeves that are mounted slidably to the columns and permit of adjusting the position of the roll shafts.
  • the belt 35 denotes a belt looped around the bottom heated roll 13, the purpose of which is to isolate the folded film entirely from the surface of the roll, thereby preventing direct contact between the two; the belt 35 is set in motion by the roll 13 itself, and tensioned by means denoted 36.
  • Plant according to the present invention comprises a cut and punch station located following the heat seal station.
  • the station in question comprises two distinct devices: a transverse cutter 40a by which the continuous film is separated into single bags, and a punch 40b designed to produce a plurality of holes along one longitudinal edge of each bag.
  • the cutter device 40a comprises a top roll 41a and a bottom roll 41b, of which the top roll 41a is urged elastically into contact with the bottom roll by spring means embodied in rubber 42.
  • the blade and the striker are clamped and adjusted for position by way of means denoted 43a and 44a, respectively.
  • the shafts 45 and 46 of the cutter device 40a are embodied hollow in order to permit of ducting a coolant to and from the rolls by way of relative manifolds 47, and are driven utilizing a system identical to that previously described for the heat seal rolls.
  • the punch device 40b similarly comprises two rolls, of which the top roll 51 affords a plurality of holes 52, arranged in a circular formation and accommodating relative balls 53 each of which is held in place by a retaining ring 54 and urged against the ring by a setscrew 55.
  • the bottom roll 56 of the device is fitted with a plurality of hollow cylindrical cutting edges 57 positioned in such a way as to register with the balls 53 of the top roll, and thus puncture each bag with circular holes.
  • the bottom roll is carried by a shaft 60 that will be embodied hollow to permit of connection to an extractor system 61 for removal of the punchings which accumulate during the course of production.
  • the two punch rolls 51 and 56 are urged together elastically by rubber spring means 62.
  • the runout from the final station coincides with a conveyor belt 63 by which the finished bags are gathered up and counted.

Landscapes

  • Making Paper Articles (AREA)
  • Laminated Bodies (AREA)
  • Bag Frames (AREA)
  • Containers And Plastic Fillers For Packaging (AREA)
  • Wrappers (AREA)
  • Pretreatment Of Seeds And Plants (AREA)

Claims (6)

  1. Installation pour la fabrication en continu de sacs en utilisant des films en polypropylène, en polythène, en polyvinyl et en autres matériaux plastiques similaires, comprenant:
    - un élément de propulsion (9) au moyen duquel dérouler un film continu provenant d'un ou de plusieurs rouleaux qui le fournissent;
    - des moyens (11) rotatifs de soudure à chaud qui opèrent continuellement et qui consistent en des rouleaux (12, 13) à propulsion mécanique disposés avec leurs axes parallèles et perpendiculaires au trajet suivi par le film, avec lesquels produire des joints fusionnés le long des bords parallèles longitudinaux du film et dans la direction transversale;
    - des moyens (40) rotatifs par lesquels couper et partager le film transversalement et/ou longitudinalement en sacs séparés;
    caractérisé en ce fait que les rouleaux (12, 13) à propulsion mécanique sont pourvus de surfaces extérieures qui font que les résistances électriques coïncident avec des générateurs de ligne cylindrique et de ligne droite de la géométrie du rouleau, et le rouleau (13) inférieur est enveloppé d'une boucle (35) de courroie servant à empêcher le contact direct entre le rouleau et le film qui passe.
  2. Installation comme celle de la revendication 1, comprenant des moyens (11) rotatifs de soudure à chaud qui consistent en deux rouleaux à propulsion mécanique (12, 13) reliés à des arbres (17, 18) creux respectifs à travers lesquels des conducteurs qui fournissent la puissance sont acheminés vers les résistances électriques, où les arbres des rouleaux sont portés entre des rails (32, 33) réglables en hauteur, de telle sorte que les positions relatives des arbres puissent être modifiées, et reliés réciproquement par des cylindres pneumatiques de telle sorte que les rouleaux puissent être pressés ensemble d'une façon élastique durant le fonctionnement et séparés l'un de l'autre au cas où il serait nécessaire de l'arrêter.
  3. Installation comme celle de la revendication 1, caractérisée en ce fait qu'elle comprend des moyens rotatifs qui coupent ou des moyens qui coupent et qui percent pour percer un des côtés longitudinaux des sacs, comprenant un dispositif (40a) de coupe qui consiste en deux rouleaux (41a, 41b) disposés avec leurs axes parallèles et perpendiculaires au trajet suivi par le film, les surfaces desquels font que respectivement au moins une lame et au moins un plat frappeur coïncident avec des générateurs de ligne cylindrique et/ou de ligne droite de la géométrie du rouleau.
  4. Installation comme celle de la revendication 1, caractérisée en ce fait qu'elle comprend des moyens rotatifs pour couper et percer comprenant un dispositif (40b) pour percer consistant en un rouleau (51) supérieur qui fournit une pluralité de trous (52) diposés en cercle et logeant des boules (53) relatives, chacune desquelles étant retenue par un anneau (54), et un rouleau (56) inférieur qui est muni d'une pluralité de bords (57) cylindriques de coupe positionnés de telle sorte qu'ils agissent réciproquement avec les boules (53) du rouleau supérieur.
  5. Installation comme celle de la revendication 4, où les bords (57) cylindriques de coupe sont creux, et communiquent au moyen de l'intérieur creux du rouleau (56) inférieur avec un système (61) d'extraction qui communique d'une façon identique avec l'intérieur creux du rouleau (56) au moyen d'un arbre creux sur lequel le rouleau même est porté.
  6. Installation comme celle de la revendication 1, caractérisée en ce fait que la courroie (35) est mise en mouvement par le rouleau (13) même et est pourvue de moyens (36) de tension.
EP89830531A 1989-01-04 1989-12-01 Installation pour la fabrication en continu de sacs en utilisant du polypropylène, polythène, PVC ou matériaux plastiques similaires Expired - Lifetime EP0377416B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89830531T ATE91250T1 (de) 1989-01-04 1989-12-01 Anlage zur kontinuierlichen verfertigung von beuteln aus polypropylen, polyethen, pvc oder aehnlichen plastischen materialien.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT400289 1989-01-04
IT400289 1989-01-04

Publications (2)

Publication Number Publication Date
EP0377416A1 EP0377416A1 (fr) 1990-07-11
EP0377416B1 true EP0377416B1 (fr) 1993-07-07

Family

ID=11112005

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89830531A Expired - Lifetime EP0377416B1 (fr) 1989-01-04 1989-12-01 Installation pour la fabrication en continu de sacs en utilisant du polypropylène, polythène, PVC ou matériaux plastiques similaires

Country Status (3)

Country Link
EP (1) EP0377416B1 (fr)
AT (1) ATE91250T1 (fr)
DE (1) DE68907475T2 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107088905A (zh) * 2016-06-30 2017-08-25 浙江汇锋薄膜科技有限公司 一种带传送机构的装饰膜切割机
US10029407B2 (en) 2014-12-04 2018-07-24 Big Heart Pet, Inc. Apparatus, processes, and systems for heat sealing

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2767306B1 (fr) * 1997-08-12 1999-10-22 Morvan Sous Traitance Procede et machine pour la fabrication de sachets fermes scelles a chaud
DE19806669A1 (de) * 1998-02-18 1999-08-19 Hetzel Gmbh & Co Kg Verfahren und Vorrichtung zur kontinuierlichen Herstellung von Kunststoffhüllen
SE515960C2 (sv) 2000-03-16 2001-11-05 Fas Converting Machinery Ab Förfarande och maskin för bearbetning av en långsträckt materialbana

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2301771A (en) * 1940-06-10 1942-11-10 Milprint Inc Art of producing receptacles
US2866392A (en) * 1956-07-25 1958-12-30 Continental Can Co Pouch manufacturing means and method
US2909969A (en) * 1958-06-12 1959-10-27 Poly Cut Corp Bag forming and sealing machine
US3793927A (en) * 1972-05-18 1974-02-26 A Emond Bag making machine
US4123956A (en) * 1977-09-12 1978-11-07 Arco Industries Corporation Self-adjusting punch device
US4273015A (en) * 1979-06-04 1981-06-16 Johnson Donald R Dome head punch
US4599926A (en) * 1984-07-16 1986-07-15 Preston Engravers, Inc. Rotary cutting dies with vacuum assist to cut and clear waste
US4674372A (en) * 1986-07-28 1987-06-23 Milliken Research Corporation Hole punch
EP0267706A1 (fr) * 1986-10-24 1988-05-18 William F. Brown Sacs en liasse et procédé de fabrication

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10029407B2 (en) 2014-12-04 2018-07-24 Big Heart Pet, Inc. Apparatus, processes, and systems for heat sealing
CN107088905A (zh) * 2016-06-30 2017-08-25 浙江汇锋薄膜科技有限公司 一种带传送机构的装饰膜切割机
CN107088905B (zh) * 2016-06-30 2019-03-12 浙江汇锋薄膜科技有限公司 一种带传送机构的装饰膜切割机

Also Published As

Publication number Publication date
DE68907475T2 (de) 1993-10-21
DE68907475D1 (de) 1993-08-12
ATE91250T1 (de) 1993-07-15
EP0377416A1 (fr) 1990-07-11

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