EP0092079A1 - Dispositif d'ondulation pour la fabrication de carton ondulé - Google Patents

Dispositif d'ondulation pour la fabrication de carton ondulé Download PDF

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Publication number
EP0092079A1
EP0092079A1 EP83103173A EP83103173A EP0092079A1 EP 0092079 A1 EP0092079 A1 EP 0092079A1 EP 83103173 A EP83103173 A EP 83103173A EP 83103173 A EP83103173 A EP 83103173A EP 0092079 A1 EP0092079 A1 EP 0092079A1
Authority
EP
European Patent Office
Prior art keywords
corrugating
cylinder
corrugated
central
corrugated 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Withdrawn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
EP83103173A
Other languages
German (de)
English (en)
Inventor
Renato Rossi
Marcello Parigi
Carlo Bramanti
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.)
Quantum Corrugated SRL
Original Assignee
Agnati SpA
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 Agnati SpA filed Critical Agnati SpA
Publication of EP0092079A1 publication Critical patent/EP0092079A1/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Withdrawn legal-status Critical Current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
    • B31F—MECHANICAL WORKING OR DEFORMATION OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31F1/00—Mechanical deformation without removing material, e.g. in combination with laminating
    • B31F1/20—Corrugating; Corrugating combined with laminating to other layers
    • B31F1/24—Making webs in which the channel of each corrugation is transverse to the web feed
    • B31F1/26—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions
    • B31F1/28—Making webs in which the channel of each corrugation is transverse to the web feed by interengaging toothed cylinders cylinder constructions combined with uniting the corrugated webs to flat webs ; Making double-faced corrugated cardboard

Definitions

  • This invention relates to an apparatus for manufacturing corrugated board, and particularly to the corrugating unit, which is an important component of this apparatus.
  • the corrugating unit of an apparatus for manufacturing corrugated board forms the so-called "single-faced corrugated board", i.e. a corrugated paper having glued thereon a plain board or liner.
  • the corrugating unit comprises two cooperating corrugating cylinders, i.e., a so-called inlet cylinder and a so-called central cylinder, both having a corrugated configuration and receiving therebetween the paper to be corrugated.
  • the corrugated paper passed between the pairs of corrugating cylinders is held in firm contact with the corrugated configuration of the central corrugating cylinder, where the ridges or tips of the corrugated paper are coated with glue by means of a glueing unit. Thereafter, the corrugated paper, still engaged with the corrugated configuration of the central corrugating cylinder and coated with glue on the ridges thereof, is bonded to the liner and is passed, together with the latter, between the central corrugating cylinder and a pressure cylinder, and then it is moved away from the central corrugating cylinder and out of the corrugating unit.
  • suction corrugating units with no fingers
  • suction corrugating units or fingerless units
  • the close adherence contact between the corrugated paper and the corrugated surface of the central corrugating cylinder is effected pneumatically by suction effect, i.e. by means of depression below atmospheric pressure.
  • This suction engagement of the corrugated paper or medium against the corrugated surface of the central corrugating cylinder reduces the possibility of formation of irregular corrugations, i.e. of high and low corrugations, and ensures, therefore, a more satisfactory bonding (glueing) of the single-faced corrugated board, compared with that ensured by the corrugating units equipped with comb members.
  • the use of suction to effect a close adherence to the corrugated paper against the surface' of the corrugating cylinder has some drawbacks.
  • the central corrugating cylinder must be provided with peripheral suction holes, notches or channels communicating, in some embodiments, with suction conduits formed in the body of said cylinder.
  • This invention aims to eliminate said drawbacks of the heretofore known corrugating units, both of the suction fingerless type and of the finger type.
  • the adherence of the corrugated paper or medium against the corrugated surface of the corrugating cylinder is caused by an air cushion rather than by suction, i.e. it is caused by a slight air pressure, just higher than atmospheric pressure, applied to the outside surface of the corrugated paper or medium, on the side opposite to that which is being engaged with the corrugating cylinder.
  • the air cushion applied to the outside surface of the corrugated wore board at the central corrugating cylinder contemplated an air cushion zone followed by a controlled air decompression section, and is applied to the central corrugating cylinder active side, i.e. the side of this cylinder where the corrugated paper or medium is coated with glue and is then bonded to the liner.
  • the air cushion preferably acts against the central corrugating cylinder sector included between the nip of said central corrugating cylinder and inlet corrugating cylinder and the region where the liner board is bonded to the corrugated paper coated with glue.
  • the liner board is approached and pre--associated to the corrugated paper, i.e. it is just approached with slight contact with the corrugated paper by means of a suitable approaching roll, located between the glueing unit and the pressure cylinder, and the air cushion presses on the corrugated paper at the central corrugating cylinder sector included between the nip of the central corrugating cylinder and inlet corrugating cylinder and the region where the liner board is approached to the corrugated paper by means of said approaching roll, while downstream of said region, to the region where the liner board is bonded to the corrugated board, the single--faced corrugated paper being formed is acted upon by the air cushion in a decompression ambient.
  • a progressive and controlled evacuation of the air entrapped between the corrugated core board and the liner board is thus obtained.
  • Said means for communication with the atmosphere may be formed, for example, by shallow annular grooves suitably spaced on the central corrugating cylinder.
  • the unit according to the invention has the advantage of using a central corrugating cylinder of conventional type, that is without holes or internal ducts. Therefore, the manufacturing and maintenance costs of these corrugating cylinders are greatly reduced, while avoiding the drawbacks of both the corrugating units equipped with comb members, and the corrugating units of the suction type with no comb members.
  • the air cushion applied onto the corrugated core board is fed into a zone which is followed by a successive controlled decompression section, partly defined by said corrugated board, there will be, practically, no appreciable pressure drop between the air cushion acting on the board and the air fed to, and present at, the air cushion zone followed by a controlled decompression section, so that the entire pressure differential between the air cushion in said zone and the ambient atmosphere is exploited to maintain the corrugated paper adhering against the corrugated surface of the central corrugating cylinder, with a negligible loss and in any operative contidion.
  • the air cushion applied to the outside surface of the corrugated core board is distributed uniformly over the entire length of the respective sector of the central corrugating cylinder, for a same total bearing force there will be a smaller specific pressure at the very narrow peripheral channels and, therefore, a negligible drawing effect of corrugated paper into said channels, whereby a uniform and continuous glueing will be obtained between the corrugated paper and the liner board at the ridges of all corrugations and over the entire length of said ridges, even at the very narrow peripheral channels.
  • a further advantage of the corrugating unit according to the invention is that the latter enables the production of single-faced corrugated board of any reduced length with respect to the length of the corrugating cylinders, because the air cushion applied to the outside surface of the corrugated core board grants the constant adherence contact of said board against the corrugated surface of the central corrugating cylinder, regardless of the width of papers.
  • the annular air discharge grooves formed in the central corrugating cylinder and designed to establish the communication to atmosphere from the interstice between the corrugating cylinder and corrugated paper, are very narrow and in small number.
  • any leaks and flowrate drops at the means generating the air cushion are negligible and do not affect the good adherence contact of the corrugated papers against the corrugated surface of the central corrugating cylinder.
  • the correct operation of the unit and the good adhering contact of the corrugated paper against the corrugating cylinder surface are not affected by any impurity either in the ambient atmosphere or of the board material. Specifically, any impurity of the board material is ejected into the atmosphere, whereby the corrugating unit according to the invention is to be ragarded as self-cleaning, thus reducing considerably the maintenance operation and shut-down drawbacks.
  • the corrugating unit of an apparatus for manufacturing corrugated board comprises an inlet corrugating cylinder 1, a central corrugating cylinder 2 and a press cylinder 3, all rotating as indicated by the arrows.
  • the peripheral surfaces of the two corrugating cylinders 1 and 2 have a corrugated configuration, and these cylinders 1 and 2 are in mesh similarly to gear wheels.
  • the paper 4 to be corrugated is fed to the inlet corrugating cylinder 1 in the direction indicated by the arrow and is passed around said cylinder and between the inlet corrugating cylinder 1 and central corrugating cylinder 2 and is thus corrugated.
  • the corrugated paper will remain on the central corrugating cylinder 2 until it has just passed the pressure cylinder 3, as will be described hereinafter.
  • the glueing roller 7 cooperates with a metering roller 8 provided with a doctor blade 9.
  • an approaching roller 10 cooperating with the central corrugating cylinder 2 and a pressure roller 11.
  • the liner board 12 is fed to the approaching roller 10 after passing around the pre-heating cylinders 13 and between the approaching roller 10 and associated pressure roller 11.
  • the approaching roller 10 places the liner 12 on the glue-coated ridges of the corrugated paper 4 supported on the central corrugating cylinder 2, without exerting any bonding pressure, that is with only a slight contact, thus effecting a mere pre-bonding between the corrugated paper 4 and the liner board 12.
  • the corrugated paper 4 and liner board 12 slightly contacted thereon by the approaching roller 10 are then passed, thus associated and pre-bonded with each other, between the central corrugating cylinder 2 and the pressure cylinder 3, where they are definitively glued and bonded.
  • the single-faced corrugated board 14 thus obtained then moves away from the central corrugating cylinder 2 and moves forward as indicated by the arrow towards other units, to be submitted to further operations.
  • an air cushion zone 15 is provided which is followed by a controlled air decompression section, wherein the desired amount of air is fed and kept under control by means of blowers, air pumps, compressors or any other source of compressed air (not shown).
  • a controlled air decompression section is also the glueing unit 5.
  • the air cushion zone 15 followed by the controlled air decompression section is located between two side walls 115 and is defined by a front wall 215 and a bottom wall 315, and on the upper side and the opposite side from the front wall 215, by a roller 16 and the inlet corrugating cylinder 1, central corrugating cylinder 2, approaching roller 7 and associated pressure roller 11.
  • the roller 16 is coated with anti-adherence rubber resisting to high temperature and is pressed against the inlet corrugating cylinder 1, while the airtight closure between the roller.16 and front wall 215 of the air cushion zone 15 followed by a controlled air decompression section, is ensured by a doctor blade 17.
  • the airtightness between the two metallic corrugating cylinders 1 and 2 is ensured by the meshing engagement of these two cylinders and interposed corrugated paper.
  • the closure between the central corrugating cylinder 2 and approaching roller 10 is ensured by the pre-association or approaching engagement of the corrugated paper and liner.
  • the closure between the approaching roller 10 and respective pressure roller 11 is ensured by the engagement between these two rollers with the interposed liner board 12.
  • the approaching roller 10 is also covered with an anti--adherence rubber coating resisting to high temperatures.
  • the pressure roller 11 is made of metal, and the closure between this roller 11 and the back wall 315 of the air cushion zone 15 follwed by a decompression section is ensured by a doctor blade 18.
  • any suitable radially and/or axially acting means may be provided, designed to accommodate any thermal expansion of said cylinders, rollers and/or respective shafts.
  • Figures 2 and 3 show two embodiments of axially-acting sealing means provided at an end of the inlet corrugating cylinder 1 ( Figure 1) and of the approaching and pressure rollers ( Figure 3).
  • annular seal 19 carried by a sealing ring 20 axially slidable within a cylindrical extension 122 of a ring member 22 fixed to the side wall 23.
  • the sealing ring 20 is axially urged by springs 24 toward the end of the corrugating cylinder 1 and is guided by bolts or stems 25 fixed to said ring 20 and slidably passing through holes in the ring member 22 and side wall 23.
  • a seal 21 is provided between the slidable ring 20 and the fixed cylindrical extension 122.
  • sealing rings 20 are axially urged against the end faces of the approaching roller 10 and pressure roller 11, either with or without interposed annular front seals.
  • the sealing rings 20 are slidably arranged each in a cylindrical extension 122 of a ring member 22 fixed to the side wall 23 around a bearing 26 supporting the shaft of the respective cylinder, as shown for the shaft 110 of the approaching cylinder 10.
  • the slidable rings 20 are axially urged by springs 24 against the ends of the respective rollers 10, 11, i.e. they resiliently yield axially and are fixed to bolts or stems 25 slidably guided through holes in the ring member 22.
  • Seals 21 are interposed between the slidable rings 20 and respective cylindrical extensions 122.
  • the two side walls 115 and the front wall 215 and bottom wall 315 of the air cushion zone followed by a controlled decompression section 15, may be arranged on a carriage 27, while the glueing roller 7, metering roller 8, sealing roller 16, approaching roller 10 and respective pressure roller 11 may be supported by the side walls 115 or remain in a pre-set position on the main body of the corrugating unit.
  • the carriage 27 is slidable on rails 28 arranged transversely of the corrugating cylinders 1 and 2 and pressure cylinder 3, whereby it may be moved away from these cylinders 1,2,3 together with the rollers 7,8,10,11,16.
  • the leaking of air between the side walls 115 of the carriage-supported assembly 15 and the fixed walls of the apparatus may be easily reduced by means familiar with those skilled in the art.
  • the single-faced corrugated board being formed passes through a decompression section 29 communicating with the atmosphere.
  • a decompression section 29 communicating with the atmosphere.
  • the adherence of the corrugated paper against the corrugated surface of the central corrugating cylinder 1 is ensured by the liner board which is placed over said corrugated paper. Therefore, in the decompression section 29, any air enclosed and entrapped within the corrugations of the corrugated board upon said pre-engagement step at the approaching roller 10 is ejected and its pressure is reduced quickly and continuously to atmospheric pressure.
  • the amount of air seeping through the corrugated board and evacuated to the atmosphere, anyway, is relatively small, whereby said annular grooves 102 may be very narrow and in small number.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
EP83103173A 1982-04-16 1983-03-30 Dispositif d'ondulation pour la fabrication de carton ondulé Withdrawn EP0092079A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1250882 1982-04-16
IT12508/82A IT1159260B (it) 1982-04-16 1982-04-16 Gruppo ondulatore per macchine per la produzione di cartone ondulato

Publications (1)

Publication Number Publication Date
EP0092079A1 true EP0092079A1 (fr) 1983-10-26

Family

ID=11140986

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83103173A Withdrawn EP0092079A1 (fr) 1982-04-16 1983-03-30 Dispositif d'ondulation pour la fabrication de carton ondulé

Country Status (2)

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EP (1) EP0092079A1 (fr)
IT (1) IT1159260B (fr)

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0144536A1 (fr) * 1983-11-07 1985-06-19 Werner H. K. Peters Maschinenfabrik GmbH Machine pour la fabrication de carton ondulé simple face
WO1988001566A1 (fr) * 1986-09-05 1988-03-10 Kastekno Oy Procede et appareil de revetement de carton ondule
US5156714A (en) * 1990-05-24 1992-10-20 United Container Machinery Group, Inc. Heater for a corrugating machine
EP0574874A1 (fr) * 1992-06-19 1993-12-22 PETERS MASCHINENFABRIK GmbH Dispositif de réglage de l'écart entre un cylindre applicateur de colle et un cylindre de passage d'une bande
GB2281921A (en) * 1993-08-31 1995-03-22 Isowa Kk Apparatus for producing single-faced corrugated board sheets
GR1002719B (el) * 1996-06-18 1997-06-10 Μηχανισμος και τροπος παραγωγης κυματοειδους χαρτου στο επιθυμητο πλατος δια συγκολλησεως δυο χαρτορολλων διαφορων διαστασεων σε μηχανη παραγωγης κυματοειδους χαρτου -οντουλε-.
GB2308392A (en) * 1995-12-18 1997-06-25 Isowa Kk Single-faced corrugated cardboard sheet making machine
ES2110889A2 (es) * 1993-09-22 1998-02-16 Isowa Kk Aparato para producir hojas de carton ondulado en una cara.
ES2110888A2 (es) * 1993-08-31 1998-02-16 Isowa Kk Aparato para producir hojas de carton ondulado en una cara.
US6623416B2 (en) 1999-06-18 2003-09-23 Marquip, Llc Single facer with resilient small diameter corrugating roll
US10618242B2 (en) 2017-10-05 2020-04-14 Guangdong Fosber Intelligent Equipment Co., Ltd. Single facer for producing single face corrugated paperboard, and related method

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2935677A1 (de) * 1978-09-04 1980-03-13 Nihon Electronic Ind Co Ltd Vorrichtung zur herstellung von einseitiger wellpappe

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2935677A1 (de) * 1978-09-04 1980-03-13 Nihon Electronic Ind Co Ltd Vorrichtung zur herstellung von einseitiger wellpappe

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0144536A1 (fr) * 1983-11-07 1985-06-19 Werner H. K. Peters Maschinenfabrik GmbH Machine pour la fabrication de carton ondulé simple face
WO1988001566A1 (fr) * 1986-09-05 1988-03-10 Kastekno Oy Procede et appareil de revetement de carton ondule
US5156714A (en) * 1990-05-24 1992-10-20 United Container Machinery Group, Inc. Heater for a corrugating machine
EP0574874A1 (fr) * 1992-06-19 1993-12-22 PETERS MASCHINENFABRIK GmbH Dispositif de réglage de l'écart entre un cylindre applicateur de colle et un cylindre de passage d'une bande
US5348612A (en) * 1992-06-19 1994-09-20 Peters Maschinenfabrik Device for adjusting the distance between a glue applying roll and a web leading roll
GB2281921A (en) * 1993-08-31 1995-03-22 Isowa Kk Apparatus for producing single-faced corrugated board sheets
ES2110888A2 (es) * 1993-08-31 1998-02-16 Isowa Kk Aparato para producir hojas de carton ondulado en una cara.
ES2110889A2 (es) * 1993-09-22 1998-02-16 Isowa Kk Aparato para producir hojas de carton ondulado en una cara.
GB2308392A (en) * 1995-12-18 1997-06-25 Isowa Kk Single-faced corrugated cardboard sheet making machine
GR1002719B (el) * 1996-06-18 1997-06-10 Μηχανισμος και τροπος παραγωγης κυματοειδους χαρτου στο επιθυμητο πλατος δια συγκολλησεως δυο χαρτορολλων διαφορων διαστασεων σε μηχανη παραγωγης κυματοειδους χαρτου -οντουλε-.
US6623416B2 (en) 1999-06-18 2003-09-23 Marquip, Llc Single facer with resilient small diameter corrugating roll
US10618242B2 (en) 2017-10-05 2020-04-14 Guangdong Fosber Intelligent Equipment Co., Ltd. Single facer for producing single face corrugated paperboard, and related method

Also Published As

Publication number Publication date
IT1159260B (it) 1987-02-25
IT8212508A0 (it) 1982-04-16

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Effective date: 19840627

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Inventor name: PARIGI, MARCELLO

Inventor name: BRAMANTI, CARLO

Inventor name: ROSSI, RENATO