EP0559181A1 - Procédé et machine pour lier des éléments composants du carton ondulé à plusieurs couches - Google Patents

Procédé et machine pour lier des éléments composants du carton ondulé à plusieurs couches Download PDF

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Publication number
EP0559181A1
EP0559181A1 EP93103409A EP93103409A EP0559181A1 EP 0559181 A1 EP0559181 A1 EP 0559181A1 EP 93103409 A EP93103409 A EP 93103409A EP 93103409 A EP93103409 A EP 93103409A EP 0559181 A1 EP0559181 A1 EP 0559181A1
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EP
European Patent Office
Prior art keywords
web
heating surface
longitudinal edges
heating
machine according
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Withdrawn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
EP93103409A
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German (de)
English (en)
Inventor
Fabrizio Massenzana
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0559181A1 publication Critical patent/EP0559181A1/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Withdrawn legal-status Critical Current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
    • B31F1/2845—Details, e.g. provisions for drying, moistening, pressing
    • B31F1/285—Heating or drying equipment

Definitions

  • the present invention relates to a process and a machine for coupling component elements of a multi-layered corrugated board as defined in the preambles of Claims 1 and 5, respectively.
  • corrugated board is made in appropriate installations in which two or more elements forming the board are joined together, for example at least one sheet of paper or thin paperboard which has been previously given a particular corrugation, and at least one smooth sheet. In many cases several corrugated and smooth sheets are combined together.
  • Coupling between the cited elements takes place in a coupling machine after said elements have been brushed by a glue dispenser.
  • a starch-based paste having various additives is used in that it is efficient, very cheap and non-polluting. But a starch-based paste is greatly watery and must be heated to enable its hardening or polymerization.
  • the coupling machine has a heating surface on which a web consisting of the elements forming the corrugated board is caused to slide.
  • the sliding speed of this web must be as high as possible in order to maintain a high production level while at the same time permitting a sufficient heat exchange with the heating surface without being obliged to arrange a too long heating surface.
  • a felt conveyor belt movable with the web is used which extends over the heating surface and also performs a pulling function.
  • Rotatable pressure rollers are used as well, they have a fixed location, are placed over the felt belt and are active in the direction of the underlying heating surface.
  • Pressure exerted by the belt and the rollers has the main function of promoting the heat exchange between the paperboard web and the heating surface. It is in fact known that the amount of transferable heat between two bodies is proportional not only to the difference in temperature, but also to the actually available surface of mutual contact.
  • pressure rollers give rise to pressure peaks on the paperboard web at the points where they are located and do not allow a uniform distribution of the pressing action on the heating surface. Practically, only 30-40% of the useful surface thereof is really in contact with the web to be heated.
  • the effectiveness of the pressure exerted by a roller depends on the thickness of the felt belt performing the function of distributing the compressive action. Therefore, as the felt becomes worn, the area of the heating surface submitted to pressure is reduced, which brings about a reduction in the heat exchange yield.
  • the paperboard web takes up important amounts of heat proportional to the progress speed of the web and the type of paper used. Therefore the temperature of the surface in contact with the paperboard web lowers greatly with respect to the temperature of the immediately adjacent members.
  • the heating surface bends transversely to the progress direction of the web and therefore pressure exerted by the rollers along their generating lines through the felt belt appears to be unhomogeneous being lower in the middle and higher at the edges of the web. Therefore inconveniences arise on gluing so that often it is necessary to reduce the progress speed of the paperboard web in order to reduce the amount of heat taken up by said web.
  • the adhesion of the paperboard web to the heating surface and the heat exchange between web and heating surface are of the greatest importance not only for the purpose of giving the glue sufficient heat to achieve its polymerization but also for removing moisture from the web.
  • a starch-based paste is almost universally used as it is advantageous both from an economic point of view because this type of paste is inexpensive, and from a technical point of view because it is very efficient.
  • this heating step constitutes the true bottle neck of the whole installation for producing corrugated board, and the true limit to a further increase in the production speed.
  • This technical task is substantially achieved by a process for coupling component elements of a multi-layered corrugated board according to Claim 1 and by a machine for putting the process into practice according to Claim 5.
  • the elements forming the corrugated board are precoated with an adhesive material.
  • the adhesive is a starch-based paste and is applied at predetermined contact areas: that is the crest of the ridges defined by the corrugation grooves of the corrugated elements or "waves", as shown in Figure 1.
  • the component elements are placed upon each other so as to define a multi-layered composite web having predominant longitudinal edges, a main face defining a rest surface and corrugation grooves exhibiting end openings at the predominant longitudinal edges.
  • the web portions that are progressively formed are brought into contact, at the rest surface of the web, with a heating surface designed to supply the heat necessary to the polimerization of said adhesive.
  • air suction takes place on the heating surface engaged by the web so as to create at least one wide vacuum area contiguous to the heating surface.
  • the creation of a vacuum area is provided under the web rest surface, so as to promote the adhesion and consequently the heat exchange between said web and the heating surface, as well as a vacuum area close to the end openings of the corrugation grooves in order to remove all steam formed during the adhesive drying and still present in said grooves.
  • the web compression is exerted on a substantially predominant portion of the part of the web contacting the underlying heating surface and is carried out by combining together a plurality of separated and contiguous pressure surfaces which are substantially flat and independent of one another.
  • It comprises a heating section 1a and a cold section 1b located downstream of the heating section 1a ( Figures 1 and 2).
  • a composite paperboard web 2 arrives at the heating section 1a; it consists of several component elements, a pair of corrugated sheets, or "waves", and a smooth sheet commonly referred to as "cover”, for example.
  • the corrugated sheets are previously coated with adhesive material, in particular a starch-based paste having a high water content, in a gluing device 3 disposed upstream of the machine 1 ( Figure 1).
  • the adhesive or paste is distributed at the crests of the ridges defined by the corrugation grooves 4 which have end openings 4a disposed at the predominant longitudinal edges 2a of the web 2.
  • Said web has a lower main face forming a rest surface 2b which is caused to slide on a heating surface 5.
  • the heating surface 5 is defined by the upper faces of a number of heating members 6 disposed in succession along a progress direction 7 of the web 2 at right angles to the transverse extension direction of the heating surface 5 and parallel to the predominant longitudinal edges 2a of the web 2.
  • the heating members 6 consist of heating plates integral at the lower part thereof with casings 6a into which steam is caused to flow by means of pipes 6b.
  • the heating members may be made from passageways of square or rectangular section into which steam is caused to flow, which passageways are disposed closely spaced so that their upper faces form themselves the heating surface 5.
  • steam is the preferred medium for supplying heat to the heating members 6 and the web 2.
  • the web 2 is moved forward by driving means 8 for example comprising a pair of belt conveyors 8a and 8b formed with felt belts for example, the first 8a of which is disposed over and in contact with the web 2 whereas the second 8b is disposed underneath it.
  • driving means 8 for example comprising a pair of belt conveyors 8a and 8b formed with felt belts for example, the first 8a of which is disposed over and in contact with the web 2 whereas the second 8b is disposed underneath it.
  • the first conveyor belt 8a also extends over the heating section 1a and, in cooperation with a presser means 9, keeps the web 2 in contact with the heating surface 5.
  • the coupling machine 1 in the heating section 1a comprises a suction apparatus 10 adapted to create at least one vacuum area at the heating surface 5. More particularly, the suction apparatus 10 as shown comprises several extractors 11 ( Figure 4) that are adapted to create a number of vacuum areas 12 in the spaces under the heating members 6, suitably enclosed by sealing side walls 12a.
  • the vacuum areas 12 communicate with the web 2 through a plurality of suction inlets 13 which are in communication with the rest surface 2b of the web 2 and through a plurality of conveying inlets 14 in communication with the end openings 4a of the corrugation grooves 4.
  • the suction inlets 13 and conveying inlets 14 are defined by slots 17 consisting partly of cutouts 17a formed in the heating members 6 and partly of clearances 17b present between the adjacent heating members 6.
  • the transverse extension of the heating surface 5 is provided to be greater than the distance between the edges 2a of web 2 and in addition the slots 17 engage points of the heating surface 5 that are located both underneath the web 2 and exterior thereof. In this way the slot portions uncovered by the web 2 define the conveying inlets 14 whereas the central slot portions define the suction inlets 13.
  • the presser means 9 comprises a number of pressure pads 18 extending transversely of the web 2 and disposed in side by side relation along the progress direction 7 of the web, and in contact with the first conveyor belt 8a.
  • the pressure pads 18 on the whole engage, through the conveyor belt 8a and web 2, a predominant portion of the heating surface 5 and are divided into a number of independent sectors 19 in transverse alignment with the web 2 and each exhibiting a substantially flat pressure surface 19a.
  • pressure pads 18 are engaged with support elements 20 comprising articulated quadrilaterals 21 designed to maintain the pressure surfaces 19a parallel to the heating surface 5.
  • each sector 19 comprises a flexible casing 22 in which a material consisting of solid granules 23 of high density is disposed.
  • the web 2 runs in the progress direction 7 and is kept constantly in contact with the heating surface 5 by the vacuum created under its rest surface 2b by the suction apparatus 10.
  • the heating members 6 can transfer heat to the web 2 for carrying out polymerization of the starch-based paste and vaporization of the water contained in the paste itself.
  • the invention attains a plurality of advantages.
  • the suction action enables a throrough contact between the web 2 and heating members 6 to be achieved.
  • the heat exchange offers a high yield and the temperature of the heating members 6 can be maintained to a minimum value with respect to the known art so that a great amount of energy can be saved.
  • a possible decrease in the temperature of the heating members 6 is a positive event also because the transverse bending of said members is reduced, as stated in the preamble.
  • the finished product also offers a greater steadiness because during cooling it is submitted to a lower number of sudden changes of temperature.
  • the operation speed of the extractors 11 can be directly proportional to the advance speed of the web on the heating surface.
  • a further important advantage is given by the fact that steam removal is carried out immediately and thoroughly at the very moment that steam is formed. By so doing it becomes unnecessary to overheat the corrugated board, said board can therefore undergo a lower heating or -alternatively- run to a higher speed.
  • the paperboards thus obtained are also provided with a higher flatness and geometrical stability, because they have absorbed no humidity and when they come out of the production line they are perfectly conditioned, that is dry to the best degree.
  • the support means 20 for the pressure pads 18 keeps the pressure surfaces 19a parallel to the heating surface 5 even on varying of the distance between said pressure surfaces and the heating surface.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Laminated Bodies (AREA)
  • Paper (AREA)
EP93103409A 1992-03-06 1993-03-03 Procédé et machine pour lier des éléments composants du carton ondulé à plusieurs couches Withdrawn EP0559181A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ITMI920500 1992-03-06
ITMI920500A IT1254506B (it) 1992-03-06 1992-03-06 Procedimento e macchina per accoppiare elementi componenti il cartone ondulato a piu' strati

Publications (1)

Publication Number Publication Date
EP0559181A1 true EP0559181A1 (fr) 1993-09-08

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ID=11362277

Family Applications (1)

Application Number Title Priority Date Filing Date
EP93103409A Withdrawn EP0559181A1 (fr) 1992-03-06 1993-03-03 Procédé et machine pour lier des éléments composants du carton ondulé à plusieurs couches

Country Status (2)

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EP (1) EP0559181A1 (fr)
IT (1) IT1254506B (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0648599A2 (fr) * 1993-10-19 1995-04-19 PETERS MASCHINENFABRIK GmbH Dispositif pour la mise en charge d'un tapis presseur dans une machine pour la fabrication du carton ondulé
DE4413775A1 (de) * 1994-04-20 1995-10-26 Bhs Corr Masch & Anlagenbau Maschine zur Herstellung einer einseitig kaschierten Wellpappebahn
DE4420726A1 (de) * 1994-06-16 1995-12-21 Bhs Corr Masch & Anlagenbau Maschine zur Herstellung einer mindestens einseitig kaschierten Wellpappebahn
WO1996031340A1 (fr) * 1995-04-06 1996-10-10 Scm Container Machinery Limited Systeme de transfert thermique
DE19536007A1 (de) * 1995-09-28 1997-04-03 Bhs Corr Masch & Anlagenbau Maschine zur Herstellung einer mindestens einseitig kaschierten Wellpappebahn
EP0940246A2 (fr) * 1998-03-05 1999-09-08 Marquip, Inc. Mécanisme sous vide , sans courroie, de retenue d'une feuille et moteur pour une machine pour fabrication de carton ondulé
EP0943423A2 (fr) * 1998-03-18 1999-09-22 BHS Corrugated Maschinen- und Anlagenbau GmbH Dispositif de chauffage pour un système de fabrication de carton ondulé

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR369949A (fr) * 1906-09-22 1907-01-24 Georges Durand Et Nicollet Soc Machine à fabriquer et sécher en continu le papier ondulé double face
US2236056A (en) * 1938-02-04 1941-03-25 Pratt Co Henry Apparatus and method of making corrugated board
US2759523A (en) * 1953-10-02 1956-08-21 Corro Ltd Method and machine for making triple wall corrugated paper board
BE672387A (fr) * 1964-11-16 1966-05-16
GB1047360A (en) * 1963-12-12 1966-11-02 Samuel M. Langston Company Apparatus for controlling the feeding of corrugated paperboard
US3319353A (en) * 1964-03-30 1967-05-16 Niwa Machinery Company Ltd Pressing and drying devices for corrugated board manufacturing equipment
DE2201742A1 (de) * 1972-01-14 1973-07-19 Bhs Bayerische Berg Verfahren und vorrichtung zum trocknen und transportieren von einer aus beleimten pappebahnen zusammengesetzten wellpappenbahn
US4042446A (en) * 1975-08-14 1977-08-16 Henry Simon Limited Corrugated board-making machinery

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR369949A (fr) * 1906-09-22 1907-01-24 Georges Durand Et Nicollet Soc Machine à fabriquer et sécher en continu le papier ondulé double face
US2236056A (en) * 1938-02-04 1941-03-25 Pratt Co Henry Apparatus and method of making corrugated board
US2759523A (en) * 1953-10-02 1956-08-21 Corro Ltd Method and machine for making triple wall corrugated paper board
GB1047360A (en) * 1963-12-12 1966-11-02 Samuel M. Langston Company Apparatus for controlling the feeding of corrugated paperboard
US3319353A (en) * 1964-03-30 1967-05-16 Niwa Machinery Company Ltd Pressing and drying devices for corrugated board manufacturing equipment
BE672387A (fr) * 1964-11-16 1966-05-16
DE2201742A1 (de) * 1972-01-14 1973-07-19 Bhs Bayerische Berg Verfahren und vorrichtung zum trocknen und transportieren von einer aus beleimten pappebahnen zusammengesetzten wellpappenbahn
US4042446A (en) * 1975-08-14 1977-08-16 Henry Simon Limited Corrugated board-making machinery

Cited By (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0648599A2 (fr) * 1993-10-19 1995-04-19 PETERS MASCHINENFABRIK GmbH Dispositif pour la mise en charge d'un tapis presseur dans une machine pour la fabrication du carton ondulé
EP0648599A3 (fr) * 1993-10-19 1996-07-10 Peters W Maschf Dispositif pour la mise en charge d'un tapis presseur dans une machine pour la fabrication du carton ondulé.
DE4413775A1 (de) * 1994-04-20 1995-10-26 Bhs Corr Masch & Anlagenbau Maschine zur Herstellung einer einseitig kaschierten Wellpappebahn
DE4420726A1 (de) * 1994-06-16 1995-12-21 Bhs Corr Masch & Anlagenbau Maschine zur Herstellung einer mindestens einseitig kaschierten Wellpappebahn
US5632850A (en) * 1994-06-16 1997-05-27 BHS Corrugated Maschinen- und Anlagenbau GmbH Machine for the manufacture of a web of at least single-face corrugated board
WO1996031340A1 (fr) * 1995-04-06 1996-10-10 Scm Container Machinery Limited Systeme de transfert thermique
FR2739319A1 (fr) * 1995-09-28 1997-04-04 Bhs Corr Masch & Anlagenbau Machine pour fabriquer une bande de carton ondule, doublee au moins sur une face
DE19536007A1 (de) * 1995-09-28 1997-04-03 Bhs Corr Masch & Anlagenbau Maschine zur Herstellung einer mindestens einseitig kaschierten Wellpappebahn
EP0940246A2 (fr) * 1998-03-05 1999-09-08 Marquip, Inc. Mécanisme sous vide , sans courroie, de retenue d'une feuille et moteur pour une machine pour fabrication de carton ondulé
EP0940246A3 (fr) * 1998-03-05 2000-07-19 Marquip, Inc. Mécanisme sous vide , sans courroie, de retenue d'une feuille et moteur pour une machine pour fabrication de carton ondulé
EP0943423A2 (fr) * 1998-03-18 1999-09-22 BHS Corrugated Maschinen- und Anlagenbau GmbH Dispositif de chauffage pour un système de fabrication de carton ondulé
DE19811858A1 (de) * 1998-03-18 1999-09-23 Bhs Corr Masch & Anlagenbau Heizvorrichtung für eine Wellpappenanlage
EP0943423A3 (fr) * 1998-03-18 2000-09-27 BHS Corrugated Maschinen- und Anlagenbau GmbH Dispositif de chauffage pour un système de fabrication de carton ondulé
US6189445B1 (en) 1998-03-18 2001-02-20 Bhs Corrugated Machinen Und Anlangenbau Gmbh Heating device for an installation producing corrugated cardboard

Also Published As

Publication number Publication date
IT1254506B (it) 1995-09-25
ITMI920500A1 (it) 1993-09-06
ITMI920500A0 (it) 1992-03-06

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