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EP0098904B1 - Méthode et appareil pour la réalisation de boîtes multicouches en carton ondulé - Google Patents

Méthode et appareil pour la réalisation de boîtes multicouches en carton ondulé Download PDF

Info

Publication number
EP0098904B1
EP0098904B1 EP82305481A EP82305481A EP0098904B1 EP 0098904 B1 EP0098904 B1 EP 0098904B1 EP 82305481 A EP82305481 A EP 82305481A EP 82305481 A EP82305481 A EP 82305481A EP 0098904 B1 EP0098904 B1 EP 0098904B1
Authority
EP
European Patent Office
Prior art keywords
mandrel
layer
pressure
sheet
shoe plate
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
Application number
EP82305481A
Other languages
German (de)
English (en)
Other versions
EP0098904A1 (fr
Inventor
David F. Gillard
Jack Thomas Yelf
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.)
MacMillan Bloedel Ltd
Original Assignee
MacMillan Bloedel Ltd
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
Priority claimed from US06/397,990 external-priority patent/US4441948A/en
Application filed by MacMillan Bloedel Ltd filed Critical MacMillan Bloedel Ltd
Publication of EP0098904A1 publication Critical patent/EP0098904A1/fr
Application granted granted Critical
Publication of EP0098904B1 publication Critical patent/EP0098904B1/fr
Expired 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
    • B31C—MAKING WOUND ARTICLES, e.g. WOUND TUBES, OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
    • B31C1/00—Making tubes or pipes by feeding at right angles to the winding mandrel centre line

Definitions

  • This invention relates to multi-layered flat walled bulk storage bins or containers made from a collapsible or compressible sheet material such as corrugated board. More particularly, the invention relates to a method and apparatus for winding single face corrugated board in multiple layers to form a storage container with substantially flat walls.
  • Corrugated board is generally made by gluing a corrugated sheet medium to flat sheet liner. Any paper, containerboard or linerboard may be used as medium or liner. The gluing occurs at the tips of the corrugations and in this way the corrugated sheet is held firm to the flat sheet and prevented from stretching or flattening.
  • Single face corrugated board has one flat sheet and one corrugated sheet.
  • Double face corrugated board is a corrugated sheet sandwiched between two flat sheets. This material is also referred to as single wall corrugated board.
  • Double wall corrugated board is a five layer composite with sheets arranged alternatively as flat-corrugated-flat- corrugated-flat. Boxes may be made from single wall or double wall corrugated board depending on the strength requirements.
  • corrugated boxes used for bulk storage bins or containers require strong reinforcement and are made from multiple layers of corrugated board. These bins are conventionally made by combining two or more layers of double wall corrugated board. The process of construction involves making the board, scoring the successive layers separately, gluing, folding, and laminating the components together to form the final bin. This sequence of manufacture is time- consuming and labour intensive.
  • a typical method of producing boxes is shown in AT-B-199,981.
  • the method comprises attaching one edge of a sheet compressible sheet layer adjacent a corner of a mandrel, pressing a pressure member across the width of the layer against the mandrel, and rotating the mandrel to wind the layer on the mandrel while ensuring that the member has sufficient movement to be in pressure contact with the layer on the mandrel as the latter rotates.
  • the present invention is concerned with a development of that known method whereby the walls of the storage bin are constructed in a single operation.
  • the invention is directed to a method which is characterised by the following features:
  • the additional momentary force crushes the corners of the layer substantially so that, when the finished container is removed from the mandrel, it may be folded at the corners into a flattened or "knockdown" configuration without separating layers or causing additional crinkles to occur in layers, which can otherwise occur at the corners.
  • the present invention also provides an apparatus for forming a multi-layered container of corrugated board having a plurality of substantial fiat sides with corners between adjacent sides, the apparatus comprising a mandrel having a plurality of substantially flat sides with corners between adjacent sides, gripping means on the mandrel to grip an edge of a corrugated board layer, means to rotate the mandrel and wind the layer around the mandrel, a pressure member located across the width of the mandrel and having movement in a predetermined path, and pressure means to push the pressure member in the predetermined path against the mandrel so that the layer is pressed against the mandrel by the pressure member during rotation of the mandrel known from AT-B-199,981, characterised in that the pressure means push the pressure member against the mandrel with a substantially constant pressure which is insufficient to crush the layer, and that high pressure means provide a momentary additional force on the pressure member to crush the layer at each corner of the mandrel.
  • a single face corrugated board 10 passes under a glue applicator roll 11 which rotates against a doctor roll 12, the trough formed between roll 11 and 12 providing a reservoir for the glue 13.
  • the glue roll 11 places glue only on the tips of the corrugations.
  • the corrugated board layer 10 then commences to be wrapped around a rotating mandrel 14 and a pressure shoe plate 15, pivoted at point A, is urged towards the mandrel 14 by a first air cylinder 16, pressing the layer 10 onto the preceding layer on the mandrel 14 with a substantially continuous pressure.
  • a flat sheet such as linerboard may be placed around the mandrel. If it is satisfactory to have a corrugated surface on the inside of the container being formed, then no flat sheet is necessary and no glue is used for the first corrugated board layer 10 wrapped around the mandrel.
  • the mandrel 14 has substantially flat surfaces 17 with corners 18 between adjacent sides.
  • a second pair of air cylinders 19 are activated which exert an additional momentary pressure towards the corner 18 through a high pressure contact member 20 which conforms approximately to the shape of the pressure shoe plate 15, thus flattening each layer 10 at the corner.
  • the contact member 20 is supported on springs so that the contact member touches the underside of the shoe plate 15 just before the air cylinders 19 apply an additional momentary pressure atthe corners 18.
  • the first air cylinder 16 ensures that the pressure shoe plate 15 always exerts an even pressure on the layer as it passes over the flat surfaces 17 of the mandrel 14.
  • the pressure of the shoe plate 15 ensures gluing occurring between the layers, and also creates drag on the layer to provide a tension in the layer as it is wound onto the mandrel. This tension ensures that each corner compression is maintained as the mandrel rotates. A momentary high pressure is applied to each layer at every corner of the mandrel by the contact member 20 so that every corner of every layer is individually crushed.
  • the container is removed from the mandrel 14.
  • the container may then be flattened.
  • Each of the crushed corners form a hinge 21, as illustrated in Figure 3, allowing a bend to occur at the hinge so that the separate layers of the container which are glued together do not separate or crinkle at the corners when the container is flattened for storage purposes.
  • corrugated board caps may be attached to the bottom and top side walls of the container by gluing, stapling or other suitable means.
  • FIG. 4 Another embodiment is shown in Figure 4 wherein a single face corrugated sheet 10 passes over a fixed roll 30, followed by a glue applicator roll 11.
  • a backing roll 31 is provided to push the sheet against the glue applicator roll 11 so glue is applied to tips of the corrugations on the sheet.
  • a constant tension roll 32 connected to a spring loaded constant tension device 33 maintains constant tension on the sheet 10 during the winding. The constant tension roll 32 maintains the sheet 10 in a line such that when the backing roll 31 is released, the sheet 10 does not contact the glue applicator roll 11, and a first layer can be wrapped around the mandrel without having glue applied.
  • the constant tensioning roll 32 allows the sheet 10 to advance at an even speed while the winding of the mandrel, although rotating at an even speed of revolution, need not have an even linear sheet speed. This is particularly true when rectangular containers are formed.
  • the pressure shoe plate 15 is contoured so that a vertical upward pressure on the plate 15 does not cause undue torque to rotate the mandrel 14.
  • the shape of the pressure shoe plate 15 provides a substantially flat or shallow curved top surface 34 and a more sharply curved lip 35 at the front facing the incoming sheet 10, pins 36 are positioned at one corner of the mandrel 14 across the width of the mandrel to hold one edge of the first corrugated sheet layer 10.
  • the pressure shoe plate 15 is supported by a lever arm pivoting at point A.
  • One air cylinder 16 keeps a constant pressure acting as a spring on the plate 15 so it is pushed against the mandrel.
  • a high pressure contact member 20 having a top surface contoured to fit the lower surface of the plate 15 is powered by two air cylinders 19, one on each end of the contact member 20 across the width of the mandrel.
  • a cam system (not shown) attached to the mandrel activates an air valve (not shown) to supply air to cylinders 19 so that the contact mem ber 20 imparts an additional momentary force to plate 15 at the exact moment that a corner 18 of the mandrel 14 is touching the plate 15.
  • the cylinders 19 have an air reservoir supply and an air valve opens the reservoir supply to the cylinders 19. In this embodiment only a small air pressure supply line is required.
  • a pressure of between about 3 and 6 pli between the pressure shoe plate 15 and the mandrel is a sufficient constant pressure to ensure gluing occurs and provide sufficient tension in a single face corrugated sheet.
  • a crushing pressure in the range of 20 to 40 pli provides a sufficient momentary force to crush the corrugated sheet.
  • pressure cylinders 16 and 19 are described as air cylinders it will be obvious to those skilled in the art that hydraulic cylinders may also be used to apply the same force. Furthermore, any other pressurizing means may be used provided that the response is sufficiently rapid and precise that the additional force exerted by the contact member 20 occurs only at the corners of the bin being formed.
  • glue applicator is shown to be a roller in the embodiment described herein itwill be obvious to those skilled in the art that any glue applicator, capable of applying glue only to the tips of the corrugations, may be used.
  • a separate supply system may be supplied at the other side of the mandrel to lay a flat sheet around the mandrel before the first layer of corrugated board is wound on.
  • the flat sheet does not have to pass under the pressure shoe plate 15 because there is no need to crush the sheet.
  • the walls of the container (which may be a large bulk storage bin) are constructed in a single operation. More specifically, a mandrel is prepared having an outside surface which is the desired interior size and the shape of the bin or container. Single-face corrugated board is then wound around the mandrel for a sufficient number of layers to give the required strength to the container. Before each layer of corrugated board is wound onto the mandrel, glue is applied to the tips of the corrugations on the corrugated side of the layer and then a pressure shoe plate presses against thecorrugated board layer to provide a constant pressure on the layer and ensure that it adheres to the previous layer.
  • a flat sheet may be passed around the mandrel before commencing winding the first corrugated board layer.
  • a momentary force additional to the constant pressure, is applied to the corner. This force is of sufficient magnitude to collapse the corrugations at the corner.
  • the constant pressure from the shoe plate holds the layer so as it is wound onto the mandrel, a tension is provided in the layer to ensure that this corner compression is maintained as the mandrel rotates.
  • the tension in the layer also helps to provide good corrugation tip contact along the face of the mandrel to ensure a proper glue joint occurs between the layers.
  • the momentary force crushes the corners of the layers substantially so that, when the finished container is removed from the mandrel, it may be folded at the corners into a flattened or "knockdown" configuration without separating layers or causing additional crinkles to occur in layers, which can otherwise occur at the corners.

Landscapes

  • Making Paper Articles (AREA)

Claims (9)

1. Méthode de formage d'un récipient multi- couches présentant une série de parois sensiblement plates avec des angles entre les parois adjacentes, méthode qui consiste à fixer un bord d'une couche (10) de feuille compressible à proximité d'un angle (18) d'un mandrin (14), à pressur un organe de pression (15) sur la largeur de la couche (10) contre le mandrin (14) et à faire tourner le mandrin pour enrouler la couche sur le mandrin tout en assurant que l'organe de pression dispose d'un mouvement suffisant pour être en contact de pression avec la couche sur le mandrin à mesure que ce dernier tourne, caractérisée en ce que:
(a) la couche de feuille compressible (10) est une feuille ondulée et l'organe de pression est une plaque de pression formant patin,
(b) on applique une pression sensiblement constante au patin à mesure que chaque côté du mandrin (14) passe sur le patin (15), cette pression constante étant insuffisante pour écraser la couche; et
(c) on applique une force momentanée supplémentaire au patin (15) à mesure que chaque angle (18) du mandrin (14) passe sur le patin, de façon que la couche (10) à chaque angle soit écrasée.
2. Méthode selon la revendication 1, caractérisée en ce que la couche de feuille compressible (10) est une feuille ondulée à simple face.
3. Méthode selon la revendication 2, caractérisée en ce qu'on applique de la colle aux crêtes des ondulations sur la feuille ondulée à simple face avant son enroulement sur le mandrin (14).
4. Méthode selon la revendication 1 ou 2, caractérisée en ce qu'on place une feuille simple autour du mandrin (14) avant l'enroulement de la feuille compressible (10).
5. Méthode selon la revendication 1, caractérisée en ce qu'on applique un enduit de colle à la couche (10) qui progresse à une vitesse sensiblement constante et on tend la couche par des moyens de tension constante (32) entre l'application de la colle et l'enroulement sur le mandrin (14) pour tenir compte de la vitesse variable des enroulements des couches autour du mandrin.
6. Appareil pour former un récipient multi- couches en carton ondulé présentant une série de côtés sensiblement plats ayant des angles entre les côtés adjacents, l'appareil comprenant un mandrin (14) ayant une série de côtés sensiblement plats (17) avec des angles (18) entre les côtés adjacents, des moyens de préhension sur la mandrin pour saisir un bord d'une couche de carton ondulé (10), des moyens pour faire tourner le mandrin et enrouler la couche autour du mandrin, un organe de pression (15) disposé sur la largeur du mandrin et ayant un mouvement suivant un trajet prédéterminé, et des moyens de pression (16) pour pousser l'organe dans son trajet prédéterminé contre le mandrin, de sorte que la couche est pressée contre le mandrin par l'organe pendant la rotation du mandrin, caractérisé en ce que les moyens de pression (16) poussent l'organe (15) contre le mandrin avec une pression sensiblement constante qui est insuffisante pour écraser la couche, et en ce que des moyens de forte pression (19) exercent une force momentanée supplémentaire sur l'organe (15) pour écraser la couche (10) à chaque angle du mandrin (14).
7. Appareil selon la revendication 6, caractérisé en ce que les moyens de forte pression (19) sont déclenchés par un système de came ou une commande électronique pour amener la force supplémentaire à agir précisément à chaque angle (18) du mandrin (14).
8. Appareil selon la revendication 6 ou 7, caractérisé en ce que les moyens (11) d'application de colle sont installés avant le mandrin (14) de façon que la couche (10) reçoive un enduit de colle sur une surface de la feuille à proximté du mandrin.
9. Appareil selon l'une quelconque des revendications 6 à 8, caractérisé en ce que l'organe de pression (15) est une plaque de pression formant patin qui présente une surface supérieure sensiblement plate avec une lèvre courbe s'étendant vers le bas depuis le devant de la plaque.
EP82305481A 1982-07-14 1982-10-14 Méthode et appareil pour la réalisation de boîtes multicouches en carton ondulé Expired EP0098904B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US06/397,990 US4441948A (en) 1981-10-28 1982-07-14 Method and apparatus for constructing multiple layer corrugated board containers
US397990 1989-08-24

Publications (2)

Publication Number Publication Date
EP0098904A1 EP0098904A1 (fr) 1984-01-25
EP0098904B1 true EP0098904B1 (fr) 1987-01-07

Family

ID=23573530

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82305481A Expired EP0098904B1 (fr) 1982-07-14 1982-10-14 Méthode et appareil pour la réalisation de boîtes multicouches en carton ondulé

Country Status (3)

Country Link
EP (1) EP0098904B1 (fr)
JP (1) JPS5931140A (fr)
DE (1) DE3274963D1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3481187D1 (de) * 1984-01-19 1990-03-08 Mac Millan Bloedel Ltd Behaelter mit geschichtetem wandungsaufbau.
FR2629012B1 (fr) * 1988-03-22 1994-01-14 Embal Systems Procede et machine pour la realisation de caisses a section polygonale en une matiere en feuille et caisses ainsi obtenues
SE541921C2 (en) * 2017-03-06 2020-01-07 Packsize Llc A box erecting method and system
US11173685B2 (en) 2017-12-18 2021-11-16 Packsize Llc Method for erecting boxes
SE543046C2 (en) 2018-09-05 2020-09-29 Packsize Llc A box erecting method and system
WO2020146334A1 (fr) 2019-01-07 2020-07-16 Packsize Llc Machine permettant d'ériger une boîte

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB479613A (en) * 1936-09-08 1938-02-09 F W Hampshire & Co Ltd Improvements in or connected with the manufacture of cartons and other containers
US2677489A (en) * 1949-08-09 1954-05-04 American Trust Company Container, apparatus and method for making the same
AT199981B (de) * 1953-12-04 1958-10-10 Alois Ederer Verfahren zur Herstellung von Schachteln, insbesondere Faltschachteln, und Vorrichtung zur Durchführung des Verfahrens

Also Published As

Publication number Publication date
JPS619141B2 (fr) 1986-03-20
EP0098904A1 (fr) 1984-01-25
DE3274963D1 (en) 1987-02-12
JPS5931140A (ja) 1984-02-20

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