EP0350418A1 - Mandrin de formage d'un boyau à soufflets - Google Patents

Mandrin de formage d'un boyau à soufflets Download PDF

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Publication number
EP0350418A1
EP0350418A1 EP89440062A EP89440062A EP0350418A1 EP 0350418 A1 EP0350418 A1 EP 0350418A1 EP 89440062 A EP89440062 A EP 89440062A EP 89440062 A EP89440062 A EP 89440062A EP 0350418 A1 EP0350418 A1 EP 0350418A1
Authority
EP
European Patent Office
Prior art keywords
mandrel
bellows
hose
forming
paper
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.)
Withdrawn
Application number
EP89440062A
Other languages
German (de)
English (en)
French (fr)
Inventor
Gilbert Braedle
Paul Cromer
Francis Huck
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.)
Hi Holweg International SA
Original Assignee
Hi Holweg International SA
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 Hi Holweg International SA filed Critical Hi Holweg International SA
Publication of EP0350418A1 publication Critical patent/EP0350418A1/fr
Withdrawn legal-status Critical Current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
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/36—Folding sheets, blanks or webs by continuously feeding them to stationary members, e.g. plates, ploughs or cores
    • 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
    • B31B2155/0012—Flexible containers made from webs by folding webs longitudinally having their openings facing in 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
    • B31B70/00—Making flexible containers, e.g. envelopes or bags
    • B31B70/26—Folding sheets, blanks or webs
    • B31B70/262—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement
    • B31B70/266—Folding sheets, blanks or webs involving longitudinally folding, i.e. along a line parallel to the direction of movement involving gusset-forming

Definitions

  • the invention relates to a mandrel for forming a bellows hose intended to be incorporated in a production line for bags of cellulosic or similar material, from a continuous strip which is wound, at the entrance, on the periphery. of the mandrel to give birth to the hose and which, by translation moves along said mandrel to exit in the form of a flattened hose having two internal bellows.
  • the present invention will find its application, in particular, in the packaging industry.
  • a bellows bag production line uses a continuous strip of paper as a raw material as a roll.
  • various operations for treating the strip there is the formation of the hose.
  • the paper strip is previously glued on one of its sides before being wound on the periphery of a forming mandrel. This operation transforms the flat strip of paper into a hose. It is carried out continuously, that is to say that the hose formed is gradually drawn along the mandrel so as to cause the strip of paper to run.
  • the forming mandrel has a substantially triangular cross-sectional profile at the entrance to gradually flatten out at the exit of rectangular shape.
  • the edges of the mandrel are strictly linear and therefore do not in any case correspond to the path taken by the strip of paper. Consequently, during the forming of the bags, the paper strip is caused to slide transversely on the mandrel, more particularly at the edges. It is precisely in these places that the frictional forces on the strip are greatest and it is frequent that these cause the rupture of said strip during high production rates.
  • the present invention aims to remedy these drawbacks.
  • the invention as characterized in the claims solves the problem of creating a mandrel for forming a bellows hose, intended to be incorporated in a production line for bags, made of cellulosic or similar material, from '' a continuous strip which is wound, at the entry, on the periphery of the mandrel to give rise to the hose and which, by translation, moves along said mandrel to exit in the form of a flattened hose having two internal bellows, this mandrel having edges whose profile follows the fold line of the hose bellows during its advancement along of said mandrel.
  • the advantages obtained thanks to the present invention consist, essentially, in that the mandrel is determined to minimize the stresses in the paper strip, which correspondingly reduces the risks of tearing.
  • the forming mandrel the present invention does not give rise to any transverse force, only the tensile force being maintained.
  • the present bellows forming mandrel requires no additional equipment and the profile of the bellows hose is foolproof. Under these conditions, the machine is set up very quickly without the intervention of specialized personnel.
  • the invention relates to a mandrel for forming a bellows hose intended to be incorporated into a production line for paper bags, or any other cellulosic or similar material, from a continuous strip which is wound at the entrance on the periphery of the mandrel to give birth to the hose and which, by translation, moves along the mandrel to exit in the form of a flattened hose with two internal bellows.
  • the vacuum forming mandrel allows existing production lines to form the casing from the continuous strip of paper.
  • external knobs are used which create the necessary folding edges.
  • the paper casing is gradually released from the mandrel, which makes it possible to exert a folding action on the free areas.
  • this way of working causes high stresses in the paper strip which tends to tear.
  • the edges of the mandrels are traditionally straight. However, this path absolutely does not correspond to that made by the paper strip. It follows that the strip of paper is caused to slide transversely along the edges of the mandrel, hence the creation of transverse tension which is added to the longitudinal tension of circulation of the strip of paper.
  • FIG. 1 shows schematically a kinematic chain for manufacturing paper bags from a continuous strip 1 of paper traditionally packaged in rolls.
  • Call cylinders 2 are used to supply the kinematic chain.
  • a perforator 3 performs transverse perforations on the paper strip 1 at regular intervals to define the length of the sachets.
  • a gluing station 4 coated with glue one of the edges of the paper strip 1 to form a hose 5.
  • This hose is obtained by winding the paper strip 1 around a forming mandrel 6.
  • the advancement of the hose 5 around the mandrel 6 is ensured by means of a friction drive 7 adjustable in speed.
  • the hose 5 is then cut into sections using drive systems 8 and 9 which operate at different speeds and rhythms.
  • the hose sections are then routed using transport rollers 10 to a folding station 11 and gluing the bottom of the bags.
  • the hose training station is a key function of the system, since it limits the production rate and is very sensitive to the quality of the paper used.
  • the profile of the edges of the mandrel 6 follows the fold line of the bellows of the hose 5 during its advancement along said mandrel 6.
  • Figure 2 shows schematically this implementation.
  • the paper strip 1 is applied over the entire periphery of the mandrel to form the hose.
  • the mandrel 6 has a rectangular section at the entrance, the width of which corresponds to that of the bag to be formed. In this way, the corners 12 of the mandrel 6 correspond to the fold lines 13 of the bellows to be formed.
  • the forming mandrel 6 is of constant width. Consequently, in its central part, the edges 12 of the mandrel 6 which form the corners of said mandrel always follow the fold lines 13 of the hose 5 as illustrated in the central part of FIG. 2.
  • the lateral flanks 14 of the mandrel 6 gradually follow the shape of the bellows 15 of the hose. Due to the vacuum prevailing in the mandrel 6, it is caused the progressive internal folding of the bellows 15. At the outlet of the mandrel 6, the latter is very tapered and its lateral flanks 14 take an acute "V" shaped profile. Under these conditions, the bellows 15 are completely formed and the fold lines 13 of the hose are clearly marked.
  • the section of the bellows hose is entirely determined by the profile of the mandrel. No adjustment is to be feared.
  • the hose 5 sees its fold lines 13 correspond to the edges of the mandrel 6. This makes it possible to avoid any movement of transverse displacement of the strip of paper against the edges 12 of the mandrel 6.
  • the paper strip is only subjected to the longitudinal tensile force.
  • the perimeter of the mandrel is preferable for the perimeter of the mandrel to be constant over its entire length.
  • the perimeter of the mandrel there is a correspondence between the perimeter of the mandrel and the perimeter of the hose during the formation of the side bellows 15.
  • the surface of the mandrel is pierced with holes 16 which, with the assistance of the internal depression of the mandrel, make it possible to keep the sheet of paper applied against it. Tests have made it possible to determine the optimum dimension of these orifices 16 which are situated around three millimeters in diameter.
  • the material used for making the mandrel 6 must have a coefficient of friction low enough to facilitate the sliding of the strip of paper along its surface.

Landscapes

  • Making Paper Articles (AREA)
EP89440062A 1988-07-05 1989-06-28 Mandrin de formage d'un boyau à soufflets Withdrawn EP0350418A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8809270A FR2633869A1 (fr) 1988-07-05 1988-07-05 Mandrin de formage d'un boyau a soufflets
FR8809270 1988-07-05

Publications (1)

Publication Number Publication Date
EP0350418A1 true EP0350418A1 (fr) 1990-01-10

Family

ID=9368223

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89440062A Withdrawn EP0350418A1 (fr) 1988-07-05 1989-06-28 Mandrin de formage d'un boyau à soufflets

Country Status (5)

Country Link
US (1) US4986806A (es)
EP (1) EP0350418A1 (es)
DE (1) DE350418T1 (es)
ES (1) ES2015519A4 (es)
FR (1) FR2633869A1 (es)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109551817A (zh) * 2018-12-21 2019-04-02 四川汇利实业有限公司 一种药盒自动折边机构

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9201096D0 (en) * 1992-01-20 1992-03-11 Unilever Plc Tube-forming apparatus
US5449156A (en) * 1993-09-09 1995-09-12 Web Printing Controls Co., Inc. Method and apparatus for longitudinally folding a printed web in a printing press
US5957823A (en) * 1998-01-13 1999-09-28 Fan; K. S. Folding mechanism for a bag knitting apparatus
GB2444574B (en) * 2007-06-13 2008-11-12 Gregory Epps Bending sheet material
CN109177318B (zh) * 2018-11-22 2024-08-06 江苏方邦机械有限公司 一种纸袋成型装置及纸袋生产线

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US331721A (en) * 1885-12-01 Paper-bag machine
US331723A (en) * 1885-12-01 Paper-bag machine
US2673495A (en) * 1946-03-13 1954-03-30 Continental Can Co Method and apparatus for making bags

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US407813A (en) * 1889-07-30 Harry c
DE827581C (de) * 1949-04-07 1952-01-10 Epag Elberfelder Papierfabrik Verfahren und Vorrichtung zur Herstellung von Papierbeuteln und -saecken mit Kreuzboeden
NL73075C (es) * 1951-05-22 1900-01-01
AT230722B (de) * 1960-05-18 1963-12-30 Wolfgang Anger Vorrichtung zur Bildung von Falten in, insbesondere nahtlosen Schlauchbahnen
US3111310A (en) * 1961-12-21 1963-11-19 Orville V Dutro Folder
FR1469835A (fr) * 1967-03-30 1967-02-17 Ethyl Corp Sac à couches multiples, procédé et appareil pour le fabriquer
US3976418A (en) * 1972-10-27 1976-08-24 The Dow Chemical Company Apparatus for gusseting continuous lengths of tubular material
DE2921757A1 (de) * 1979-05-29 1980-12-04 Maschf Augsburg Nuernberg Ag Verfahren zum herstellen eines trichterbleches fuer einen falztrichter einer rotationsdruckmaschine und danach hergestelltes trichterblech
US4591354A (en) * 1984-08-15 1986-05-27 Wilverly Mansions I.B.V. Apparatus for folding sheet materials
US4578051A (en) * 1985-02-25 1986-03-25 Container Corporation Of America Film tube gusset forming machine
US4648861A (en) * 1985-06-25 1987-03-10 Kimberly-Clark Corporation Folding apparatus and method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US331721A (en) * 1885-12-01 Paper-bag machine
US331723A (en) * 1885-12-01 Paper-bag machine
US2673495A (en) * 1946-03-13 1954-03-30 Continental Can Co Method and apparatus for making bags

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109551817A (zh) * 2018-12-21 2019-04-02 四川汇利实业有限公司 一种药盒自动折边机构
CN109551817B (zh) * 2018-12-21 2020-07-07 四川汇利实业有限公司 一种药盒自动折边机构

Also Published As

Publication number Publication date
ES2015519A4 (es) 1990-09-01
DE350418T1 (de) 1990-11-08
FR2633869A1 (fr) 1990-01-12
US4986806A (en) 1991-01-22

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