EP0118948A1 - Appareil pour former des lignes de plis dans une feuille de carton - Google Patents

Appareil pour former des lignes de plis dans une feuille de carton Download PDF

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Publication number
EP0118948A1
EP0118948A1 EP84200282A EP84200282A EP0118948A1 EP 0118948 A1 EP0118948 A1 EP 0118948A1 EP 84200282 A EP84200282 A EP 84200282A EP 84200282 A EP84200282 A EP 84200282A EP 0118948 A1 EP0118948 A1 EP 0118948A1
Authority
EP
European Patent Office
Prior art keywords
sheet
creasing
cardboard
track
support surface
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
EP84200282A
Other languages
German (de)
English (en)
Other versions
EP0118948B1 (fr
Inventor
Jan Middel
Damiaan Joan Arends
Gezinus Arend Steenkamp
Willem Wonink
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.)
Tata Steel Ijmuiden BV
Original Assignee
Hoogovens Groep BV
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 Hoogovens Groep BV filed Critical Hoogovens Groep BV
Priority to AT84200282T priority Critical patent/ATE20448T1/de
Publication of EP0118948A1 publication Critical patent/EP0118948A1/fr
Application granted granted Critical
Publication of EP0118948B1 publication Critical patent/EP0118948B1/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
    • 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
    • B31F1/08—Creasing
    • B31F1/10—Creasing by rotary tools
    • 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
    • B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
    • B31B50/25—Surface scoring
    • B31B50/256—Surface scoring using tools mounted on a drum

Definitions

  • the invention relates to apparatus for creasing fold lines in a sheet of cardboard, and particularly but not exclusively to apparatus for making the creased fold lines in a cardboard sheet which is to form a rectangular lid or cover having top and downwardly extending sides, for which fold lines must be made in both sides of the sheet.
  • Netherlands patent application No. 8102950 shows a folded cardboard component in the form of a lid which covers the top of a stack of tinplate and has preformed creases.
  • this lid is illustrated in Fig. 1 of the drawings accompanying the present application. Part of a sheet, unfolded but creased, is shown for this lid in Fig. la. After it has been folded by hand by an operative, it has the shape shown in perspective in Fig. lb; the edges of the cardboard sheet are thus bent downward from the top of the lid to form the sides.
  • the complete lid is shown (upside down) in Fig. lc. It can be seen that the four long fold lines parallel to the edges are formed in one side of the sheet while the short diagonal fold lines at each corner are formed in the other side.
  • the object of the invention is to provide apparatus which can quickly and accurately make the required creases in a sheet of cardboard, e.g. for a lid as described above.
  • the apparatus can within certain limits make a large number of sizes of lids out of cardboard sheets of varying dimensions.
  • the apparatus has an upright support surface for the sheet a conveyor, preferably horizontally working, which transports the sheet of cardboard in upright condition to the support surface, a track or underlayer of resilient material adjacent the support surface and a pressure wheel with sharp (but preferably rounded) creasing periphery which is movable along the track.
  • a conveyor preferably horizontally working, which transports the sheet of cardboard in upright condition to the support surface
  • a track or underlayer of resilient material adjacent the support surface
  • a pressure wheel with sharp (but preferably rounded) creasing periphery which is movable along the track.
  • the apparatus has a contact-sensing mechanism to determine the dimensions of the cardboard sheet on the support surface.
  • a further feature is a suction pad which can be moved vertically and horizontally over the support surface in order to pick up the cardboard sheet and displace it to bring it to the desired position where it overlaps the resilient track, this suction pad being also rotatable, preferably stepwise through 90° steps in order to permit the sheet to be creased along four edges.
  • Another feature is a creasing tongs arranged to operate on the other side of the sheet from the creasing wheel.
  • control means which, from the output of the contact sensing means, determine the position of the centre of the sheet and move the suction pad to that position to pick up the sheet.
  • the dimensions of the surface of a stack of tin- plate can vary from 500 to 1000 mm, in steps of 1 mm. Efforts have been made to standardise the tin-plate dimensions, but even so the dimensions of the sheet of cardboard from which the lid, which is later to be placed on the stack of plate, is folded, are much easier to standardise. For example, it may be possible to achieve a limited number of fixed formats for the sheet, e.g. 10; the apparatus of the invention can be capable of rapid adjustment for all formats which occur, both of cardboard sheets and the lids formed from them.
  • the pre-creasing of the fold lines in the cardboard sheet is achieved in the apparatus without removal of material; thus a lid can be folded from the cardboard sheet without making notches at the corners and the creasing may be performed without significantly breaking or bruising the fibres of the cardboard.
  • the apparatus of the drawings is particularly adapted for the production of the fold lines for the lid shown in Fig. 1, already described.
  • the production of each crease in one side of the sheet of cardboard is achieved by means of the creasing wheel 24 shown in Fig. 2.
  • the sheet 20 shown in this figure has a rectangular shape, and a crease 21 is made parallel to each of the sides.
  • a resilient track of elastomeric material 22 is used as a backing for the cardboard, e.g. hard rubber with a hardness of 60° to 70° shore, at 22.
  • the creasing wheel 24 is mounted on a spindle 23, and has at its periphery a sharp edge 25 with a taper angle of about 30°.
  • the creasing wheel is preferably.,made of a suitable plastics material, and, for example, has a diameter of 32 cm.
  • the edge 25 has a rounding radius of lmm.
  • the pressure exerted between the wheel 24 and the cardboard is preferably at least 100 kg, in the embodiment being about 200 kg, or even 250 kg.
  • FIG. 3 the rubber track of underlayer 22 is again shown with the creasing wheel 24 having its rounded edge 25.
  • Fig. 3b shows how deeply the creasing wheel presses into the track 22 taking the cardboard sheet with it and deforming it into a creased fold line (Fig. 3c). In this way the cardboard can be easily and tightly applied later to a stack of tin-plate sheets, the bent cardboard being shown by Fig. 3d.
  • a diagonal corner crease line has to be made at each of the four corners of the cardboard sheet on the other side from the lines 21, to enable the cardboard sheet to be folded into a lid, as discussed above in connection with Fig. lb. This is done by the creasing tongs, described below.
  • Fig. 4 shows the horizontal conveyor which brings the sheet into position on the support surface or panel described below, and shows how a vertical sheet 20 of cardboard is propelled between the continuously driven toothed belt 40 and a set of rollers 41 and 42 which hold the cardboard sheet 20 against the toothed belt 40, until the sheet comes against a fixed stop 43; at this point, either mechanically or using a photo-electric cell, it is arranged that the rollers 41 and 42 stop their pressing action, so that the sheet comes to rest. The rollers 41 and 42 retract to the position shown by the broken lines.
  • the dimensions of the sheet of cardboard so inserted must now be determined, before the crease lines can be formed.
  • the dimensions of the cardboard sheet may lie between 750 and 1260 mm and typically come in a total of 10 standardized formats.
  • the cardboard typically also has a thickness of 2 mm or less and a weight of 800 to 1000 g/m 2.
  • the apparatus has contact sensors which move to engage the sheet edges, to determine its size.
  • the principle of operation of the apparatus is to displace the cardboard sheet in its own plane by picking it up at its centre-of-gravity using a suction pad such as a vacuum disc.
  • a suction pad such as a vacuum disc.
  • a vacuum disc is shown in Fig. 6, which illustrates how the sheet of cardboard 20 can be picked up by a flat vacuum disc 60 having an annular seal 61 of soft rubber and a central recess connected via a duct 62 to a vacuum source.
  • This vacuum disc can, as shown schematically in Fig. 5, be moved over the cardboard sheet until it reaches the centre-of-gravity of this sheet, and can then be engaged with the cardboard sheet 20. These movements are controlled by the control means.
  • the vacuum disc is therefore movable in a horizontal direction and also vertically, and can also be rotated around its axis, as shown in Fig. 5, in order to rotate the sheet which has been picked up by it.
  • the illustrated apparatus thus requires only one creasing wheel for making four creases in a sheet of cardboard, and in operation the sheet is rotated by the suction pad in its own plane relative to this wheel so that the creases are formed in the correct places on the cardboard sheet.
  • the sheet is thus creased in four steps by successive stepwise rotations through 90°.
  • a short diagonal fold line is also made in each corner of the sheet as far as the nearby intersection of the two long crease lines in the rear face of the sheet.
  • This is done using a creasing tongs, which makes a fold at about 10° out of the plane of the sheet.
  • the principle of operation of the creasing tongs is shown in Fig. 9.
  • the creasing tongs has two jaws 90 and 91, which receive the cardboard sheet 20 and are hinged at the fixed pivot 92.
  • the jaws are pulled together by a lever system 93, 94, 95, 96 which is operated by a piston-and-cylinder unit 97.
  • the force applied to the sheet is preferably at least 1000 kg and may be about 2500 kg.
  • the creasing tongs are preferably adjustable in this respect.
  • the corner crease is in each case formed before the cardboard sheet is rotated to the next position, as described above.
  • the apparatus is shown in full in Figs. 7 and 8, respectively in side and front elevation.
  • the sheet of cardboard which is being creased is omitted for clarity.
  • the support panel is slightly tilted back from the vertical as appears from Fig. 7, in order to allow the inserted cardboard to lie easily.
  • the cardboard is moved by the horizontal conveyor as described above to a stop and then comes to rest.
  • a plotting frame (not shown) forms the dimension determining means described above and is mounted over the support panel having two mutually orthogonal operational co-ordinates, as shown in Fig. 5.
  • the rotatable vacuum disc 60 is shown and this can be moved both horizontally and vertically, and can also rotate about its own axis. All movements are controlled by the control means which takes the form of a microprocessor, not shown.
  • the rotation of the vacuum disc 60 is always anticlockwise at a rate of 90° per second. Its vertical displacement occurs at a speed of 0.25 m/sec.
  • the resilient track 22 is located at one edge of the somewhat tilted support panel.
  • the creasing wheel 24 is mounted on a holder 80 which can be moved up and down by a carriage 81.
  • the extremitites of the track 22 are bevelled, as may be seen at 26, 27, so that the creasing wheel 24 effects a crease in the cardboard sheet with more certainty (see Fig. 2 and Fig. 3b).
  • the creasing tongs is indicated in Fig. 8 schematically by reference number 86.
  • cardboard we mean also similar board materials, such as pasteboard.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Making Paper Articles (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
EP84200282A 1983-03-10 1984-03-01 Appareil pour former des lignes de plis dans une feuille de carton Expired EP0118948B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT84200282T ATE20448T1 (de) 1983-03-10 1984-03-01 Apparat zum erzeugen von faltlinien in pappenboegen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL8300871 1983-03-10
NL8300871A NL8300871A (nl) 1983-03-10 1983-03-10 Machine voor het rillen van vouwlijnen in een vel karton, dat bestemd is voor een deksel.

Publications (2)

Publication Number Publication Date
EP0118948A1 true EP0118948A1 (fr) 1984-09-19
EP0118948B1 EP0118948B1 (fr) 1986-06-18

Family

ID=19841531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84200282A Expired EP0118948B1 (fr) 1983-03-10 1984-03-01 Appareil pour former des lignes de plis dans une feuille de carton

Country Status (6)

Country Link
EP (1) EP0118948B1 (fr)
AT (1) ATE20448T1 (fr)
CA (1) CA1224506A (fr)
DE (1) DE3460236D1 (fr)
NL (1) NL8300871A (fr)
NO (1) NO840912L (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3527537A1 (de) * 1985-08-01 1987-02-12 Lks Laser Kombinations Systeme Maschine zum herstellen von musterkartonagen
FR2778361A1 (fr) * 1998-05-07 1999-11-12 Groupe Sramag Procede et dispositif de rainage d'une bande ou feuille de matiere semi-rigide, notamment de papier-carton, en vue de son pliage
CN113665169A (zh) * 2021-09-01 2021-11-19 丰城市星泽科技有限公司 一种瓦楞纸箱压痕装置

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111645361A (zh) * 2020-05-20 2020-09-11 福州奔翔包装用品有限公司 一种包装盒用压痕装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1246239A (fr) * 1958-09-17 1960-11-18 Vickers Armstrongs Ltd Machine à former des lignes de pliage dans des feuilles ou plaques de fibre
GB1267155A (fr) * 1970-02-18 1972-03-15

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1246239A (fr) * 1958-09-17 1960-11-18 Vickers Armstrongs Ltd Machine à former des lignes de pliage dans des feuilles ou plaques de fibre
GB1267155A (fr) * 1970-02-18 1972-03-15

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3527537A1 (de) * 1985-08-01 1987-02-12 Lks Laser Kombinations Systeme Maschine zum herstellen von musterkartonagen
FR2778361A1 (fr) * 1998-05-07 1999-11-12 Groupe Sramag Procede et dispositif de rainage d'une bande ou feuille de matiere semi-rigide, notamment de papier-carton, en vue de son pliage
CN113665169A (zh) * 2021-09-01 2021-11-19 丰城市星泽科技有限公司 一种瓦楞纸箱压痕装置

Also Published As

Publication number Publication date
EP0118948B1 (fr) 1986-06-18
CA1224506A (fr) 1987-07-21
DE3460236D1 (en) 1986-07-24
ATE20448T1 (de) 1986-07-15
NL8300871A (nl) 1984-10-01
NO840912L (no) 1984-09-11

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