EP0976540A2 - Dispositif pour la fabrication de carton ondulé avec une face pleine - Google Patents

Dispositif pour la fabrication de carton ondulé avec une face pleine Download PDF

Info

Publication number
EP0976540A2
EP0976540A2 EP99202474A EP99202474A EP0976540A2 EP 0976540 A2 EP0976540 A2 EP 0976540A2 EP 99202474 A EP99202474 A EP 99202474A EP 99202474 A EP99202474 A EP 99202474A EP 0976540 A2 EP0976540 A2 EP 0976540A2
Authority
EP
European Patent Office
Prior art keywords
ribbon
cylinder
cardboard
corrugated cardboard
corrugating
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.)
Granted
Application number
EP99202474A
Other languages
German (de)
English (en)
Other versions
EP0976540A3 (fr
EP0976540B1 (fr
Inventor
Gabriele Torretta
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.)
TERDECA S.P.A.
Original Assignee
Ingg Terzaghi & De Castiglione Industriale 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 Ingg Terzaghi & De Castiglione Industriale SpA filed Critical Ingg Terzaghi & De Castiglione Industriale SpA
Publication of EP0976540A2 publication Critical patent/EP0976540A2/fr
Publication of EP0976540A3 publication Critical patent/EP0976540A3/fr
Application granted granted Critical
Publication of EP0976540B1 publication Critical patent/EP0976540B1/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
    • 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 refers to a device for the production of corrugated cardboard with a single fat surface.
  • the machines producing such a cardboard generally comprise as essential elements a pair of corrugating cylinders, a glue applying cylinder and a pressing cylinder.
  • a first cardboard ribbon is corrugated by a pressure simultaneously exerted on it by a pair of corrugating cylinders.
  • the glue applying cylinder then applies the glue on the crests of the corrugations and the pressing cylinder applies a second flat cardboard ribbon under pressure on the crests of the first corrugated cardboard ribbon.
  • said ribbon crests are internally supported by the corresponding projections of the corrugating cylinder.
  • the final adhesion is achieved by pressing and heating the glue spread between the ribbons.
  • Machines of such a type are for instance described in the patent FR-A-1538604.
  • the outer surface of the second flat cardboard ribbon of the product obtained from such machines consisting in a corrugated cardboard with a single flat surface, reveals the junction lines of the crests with the mentioned second ribbon, usually known as "pressure lines".
  • the patent application FR-A-2719521 offers a machine in which the pressure directly exerted on the cardboard by the pressing cylinder is reduced (and eventually annulled), while on the contrary applying a stretching force, through the second corrugating cylinder, on the second flat cardboard ribbon, while both of the cardboard ribbons are still running on the same.
  • the purpose of this invention consists in achieving an improved device for the production of corrugated cardboard with a single flat surface, free of any junction lines of the crests of the first corrugated cardboard ribbon on said second flat cardboard ribbon, even if the production parameters are changed; in other words, an easily manageable machine.
  • the invention therefore covers both a device as defined in its essential aspects both by the first claim and in its preferential embodiments by the claims referring to the same, as well as a process defined in its essential features by the fourth claim.
  • the corrugating rollers essentially perform only the functions of permanently corrugating and preheating the first cardboard ribbon. In these rollers, no superposition or pressure of the second flat cardboard ribbon occurs on the first permanently corrugated cardboard ribbon. This means that there's no need for any pressing cylinder with a direct or indirect action.
  • the line along which the first contact occurs between the first corrugated cardboard ribbon 7 and the second flat cardboard ribbon 9 is set either next to the passage between the second corrugating cylinder 3 and the heating cylinder 4, or on the heating cylinder 4.
  • the superposition of the two cardboard layers occurs only by keeping the second flat cardboard ribbon in a stretched and heated condition, while the first corrugated cardboard ribbon is simply laid down in a preheated form and without any significant stretching force which may affect its corrugation.
  • the pre-heating phases allow stabilizing the structure assumed by the product until the glue finally takes hold.
  • the stretching force needed on the produced cardboard in order to extract it from the machine is totally sustained only by the first flat cardboard ribbon.
  • the number 1 generally indicates the overall machine for the production of corrugated cardboard with a single flat surface. It essentially comprises a first corrugating cylinder 2 and a second corrugating cylinder 3, a heating cylinder 4, a first cylinder 5 and a second cylinder 6 introducing the first cardboard ribbon 7, at least one cylinder 8 introducing a second ribbon 9 and at least one cylinder 10 extracting the corrugated cardboard with a single flat surface 11.
  • the cylinders 2, 3, 4, 5, 6, 8, and 10 are supported by a frame 12 (only partially shown), so as to be capable of rotating around their respective central symmetry axes 13, 14, 15, 16, 17, 18 and 19, all arranged in parallel to each other.
  • the machine 1 comprises certain devices, for instance pneumatic or hydraulic devices not shown for simplicity, capable of generating a depression on the outer face of the cylinders, as in the case shown in the figure on the cylinders 2-4. This depression is aimed at attracting the cardboard ribbons to the surfaces of said cylinders.
  • the machine 1 also comprises some devices for the preheating of at least one of said cylinders or the outer surface of said cylinders, with which the cardboard under processing is destined to come into contact. These devices are in themselves known, and are for instance described in the French patent FR-A-2622145.
  • the cylinder 4 is fitted with a heating system and connected to a suction system; it is essentially arranged tangentially to the second corrugating cylinder 3 along the line 20, downstream of which the first contact between the first already corrugated cardboard ribbon 7 and the second flat cardboard ribbon 9 occurs.
  • the cylinder 8 introducing the second flat cardboard ribbon 9 is positioned above the gluing cylinder 22.
  • the cylinder 10 extracting the corrugated cardboard 11 with a single flat surface is arranged on the side of the heating cylinder 4 that happens to be opposite the one where the first point of contact 20 between the first corrugated cardboard ribbon 7 and the second flat cardboard ribbon 9 occurs.
  • the section in which the first contact 20 occurs is therefore the one where the first corrugated cardboard ribbon 7 is transferred, without being subjected to any significant force, from the second corrugating cylinder 3 to the heating cylinder 4.
  • the second corrugating cylinder 3 and the heating cylinder 4 are positioned very closely to each other, but without the need for an actual contact between them, which may occur or not.
  • the line of first contact 20 between the two cardboard ribbons may therefore already rest on the cylinder 4 or in their passage between the cylinders 3 and 4.
  • the adjustment of the line or portion of contact is done based on the processing parameters, and may be performed by modifying the position of the cylinder 8, and/or by eventually increasing the distance between the axes 14 and 15 of the cylinders 3 and 4.
  • the adjustment of the contact 20 between the cardboard ribbons 7 and 9 is always made in such a manner as to avoid the formation of pressure lines or the appearance of the junction lines of the crests of the first corrugated cardboard ribbon 7, independently of the changes in the operating parameters.
  • the heating cylinder 4, the first corrugating cylinder 2 and the second corrugating cylinder 3 have their rotating axes arranged in the same plane.
  • the process for producing the corrugated cardboard 11 with a single flat surface according to this invention substantially unfolds in the following phases.
  • the process involves a pair of corrugating cylinders 2 and 3 fitted with some projections of a shape corresponding to the corrugation to be applied to the cardboard.
  • the cylinders are facing each other and reciprocally engage so as to permanently corrugate said first cardboard ribbon 7.
  • the cylinders 5 and 6 serve the purpose of introducing and properly channeling the first cardboard ribbon between the pair of corrugating cylinders 2 and 3.
  • a phase for the application of glue on the tops of the crests or corrugations of the first cardboard ribbon 7 follows.
  • the second corrugating cylinder 3 acts as a matching unit against the gluing cylinder 22 of the glue application system 21, preventing the just profiled crests of the first cardboard ribbon 7 from being deformed or squashed.
  • the ribbon 9 runs in the direction of the arrow "G".
  • This phase does not provide for a significant pressure between the first cardboard ribbon 7 and the second cardboard ribbon 9, or at most for a very limited pressure, such as to essentially merely affect the interspersed layer of glue.
  • the first contact 20 between the first corrugated cardboard ribbon 7 and the second cardboard ribbon 9 occurs downstream of the gluing cylinder 22, and is preferably set just before or on the heated lateral surface of the heating cylinder 4. On this surface the second cardboard ribbon 9 is kept stretched, while the opposite crests of said first cardboard ribbon 7 are left unsupported.
  • the contact and superposition of the two ribbons is followed by a glue heating and activating phase, designed to shape and produce the corrugated cardboard 11 which is discharged from the machine along a path marked by the arrow "H".
  • the cylinder 10 takes care of extracting it.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Laminated Bodies (AREA)
EP99202474A 1998-07-30 1999-07-28 Dispositif et méthode pour la fabrication de carton ondulé avec une face pleine Expired - Lifetime EP0976540B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT1998MI001780A IT1301887B1 (it) 1998-07-30 1998-07-30 Dispositivo per la produzione di cartone ondulato ad una sola facciapiana
ITMI981780 1998-07-30

Publications (3)

Publication Number Publication Date
EP0976540A2 true EP0976540A2 (fr) 2000-02-02
EP0976540A3 EP0976540A3 (fr) 2001-01-17
EP0976540B1 EP0976540B1 (fr) 2005-04-13

Family

ID=11380567

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99202474A Expired - Lifetime EP0976540B1 (fr) 1998-07-30 1999-07-28 Dispositif et méthode pour la fabrication de carton ondulé avec une face pleine

Country Status (5)

Country Link
EP (1) EP0976540B1 (fr)
AT (1) ATE293039T1 (fr)
DE (1) DE69924678T2 (fr)
ES (1) ES2242353T3 (fr)
IT (1) IT1301887B1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2513226A (en) * 2013-02-14 2014-10-22 Interpac Ltd Method and apparatus for manufacture of corrugated paperboard

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1538604A (fr) * 1967-07-27 1968-09-06 Vente De Materiels Pour La Fab Onduleuse à carton à changements rapides de reliefs d'ondulation
US4917664A (en) * 1987-10-23 1990-04-17 Papeteries Et Cartonneries Lacaux Freres Fluted roll for a corrugated board manufacturing machine
EP0559556A1 (fr) * 1992-03-02 1993-09-08 Manuel Torres Martinez Installation pour la fabrication de carton ondulé
US5614048A (en) * 1993-07-20 1997-03-25 Otor Machine and process for making a sheet of single face corrugated cardboard
EP0850754A2 (fr) * 1996-11-01 1998-07-01 Marquip, Inc. Machine pour la fabricatin, à basse presseion, de carton ondulé simple face

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1538604A (fr) * 1967-07-27 1968-09-06 Vente De Materiels Pour La Fab Onduleuse à carton à changements rapides de reliefs d'ondulation
US4917664A (en) * 1987-10-23 1990-04-17 Papeteries Et Cartonneries Lacaux Freres Fluted roll for a corrugated board manufacturing machine
EP0559556A1 (fr) * 1992-03-02 1993-09-08 Manuel Torres Martinez Installation pour la fabrication de carton ondulé
US5614048A (en) * 1993-07-20 1997-03-25 Otor Machine and process for making a sheet of single face corrugated cardboard
EP0850754A2 (fr) * 1996-11-01 1998-07-01 Marquip, Inc. Machine pour la fabricatin, à basse presseion, de carton ondulé simple face

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2513226A (en) * 2013-02-14 2014-10-22 Interpac Ltd Method and apparatus for manufacture of corrugated paperboard
GB2513226B (en) * 2013-02-14 2020-02-26 Interpac Ltd Apparatus and method for corrugated paperboard manufacture using suction drum

Also Published As

Publication number Publication date
ES2242353T3 (es) 2005-11-01
EP0976540A3 (fr) 2001-01-17
IT1301887B1 (it) 2000-07-07
ITMI981780A0 (it) 1998-07-30
ITMI981780A1 (it) 2000-01-30
ATE293039T1 (de) 2005-04-15
EP0976540B1 (fr) 2005-04-13
DE69924678D1 (de) 2005-05-19
DE69924678T2 (de) 2006-03-02

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