EP2052849B1 - Honeycomb-corrugated cardboard assembly - Google Patents

Abstract

The device has a block supply unit (16) for supplying block (2) of cardboard along a transportation direction (8). A cutting unit (11) is provided for cutting strip (12) from a block of cardboard. A gluing unit (14) is provided for gluing a side of the strip. The device also has a connecting unit (82,84) for glued interconnection of the strips in the formation of honeycomb cardboard. An independent claim is included for a method for producing a honeycomb cardboard.

Description

The invention relates to a device and a method for producing honeycomb corrugated board.

Corrugated board as a practical material has long been known. However, their fields of application are limited because they can not absorb surface forces on them.

Devices and methods for producing honeycomb corrugated board are known for example from WO 2008/003 015 A2 or from the CH 688 370 A5 known.

The invention has for its object to provide an apparatus and a method for producing honeycomb corrugated cardboard, wherein the longitudinal channels are perpendicular to the main plane thereof.

The object is solved by the features of independent claims 1 and 5. The core of the invention is first to produce multi-ply corrugated cardboard in a conventional corrugated plant, cut them into strips, gluing at the top, to rotate the individual strips by 90 ° and put together to form a block honeycomb corrugated cardboard.

Advantageous embodiments of the invention will become apparent from the dependent claims.

Fig. 1

eine Seitenansicht einer Vorrichtung zur Herstellung von Waben-Wellpappe,

Fig. 2

eine Ausschnittvergrößerung der Schneid-Einrichtung gemäß Fig. 1,

Fig. 3

eine Ansicht entsprechend Fig. 2 mit einem vereinzelten Stapel von Wellpappe-Streifen,

Fig. 4

eine Draufsicht auf die Vorrichtung gemäß Fig. 1,

Fig. 5

eine vergrößerte Darstellung der Transport-Einrichtung gemäß Fig. 1,

Fig. 6

eine vergrößerte Darstellung der Beleimungs-Einrichtung gemäß Fig. 1,

Fig. 7

eine vergrößerte Ansicht der Wellpappe-Streifen-Wende-Einrichtung gemäß Fig. 1,

Fig. 8

eine vergrößerte Ansicht der die Wende-Walze gemäß Fig. 7,

Fig. 9

eine Ansicht der Wellpappe-Streifen-Wende-Einrichtung gemäß Fig. 7 und

Fig. 10

ein Stück Waben-Wellpappe.

Additional features and details of the invention will become apparent from the description of an embodiment with reference to the drawings. Show it

Fig. 1

a side view of an apparatus for producing honeycomb corrugated cardboard,

Fig. 2

a detail enlargement of the cutting device according to Fig. 1 .

Fig. 3

a view accordingly Fig. 2 with a scattered stack of corrugated strips,

Fig. 4

a plan view of the device according to Fig. 1 .

Fig. 5

an enlarged view of the transport device according to Fig. 1 .

Fig. 6

an enlarged view of the gluing device according to Fig. 1 .

Fig. 7

an enlarged view of the corrugated strip-turning device according to Fig. 1 .

Fig. 8

an enlarged view of the turning roller according to Fig. 7 .

Fig. 9

a view of the corrugated strip-turning device according to Fig. 7 and

Fig. 10

a piece of honeycomb corrugated board.

Hereinafter, an apparatus for producing honeycomb corrugated cardboard 1 will be described. It is assumed in the device according to Fig. 1 from a block 2 of several glued on one side laminated corrugated sheets. Corrugated cardboard laminated on one side consists of a corrugated corrugated sheet 3 and a smooth corrugated one Deckbahn 4. The production of one-sided laminated corrugated cardboard in endless webs is known, for example from the DE 103 12 600 A1 , Within a corrugated board plant several layers of corrugated cardboard laminated on one side can be glued to each other, so that a larger sequence of adhered cover sheets, corrugated sheets, cover sheets, corrugated webs, etc. arises. Such multi-ply corrugated webs are cut into sheets, hereinafter referred to as blocks 2, and stacked at the end of the corrugating machine. These blocks 2 have as a main level a block level 5, in which the top 6 of the block 2 is located. The channels 7 formed between the corrugated web 3 and the cover sheet 4 run parallel to the block plane 5. The blocks 2, of which the device according to Fig. 1 are aligned, are aligned so that the channels 7 parallel to a horizontal, in Fig. 1 run from right to left extending transport direction 8. In the device according to Fig. 1 For example, it is assumed that a block 2, which consists of five alternately stacked corrugated sheets 3 and cover sheets 4.

The with the device according to Fig. 1 produced product is referred to as honeycomb corrugated board 1. It is exemplary in Fig. 10 shown. The honeycomb corrugated board 1 has a planar upper side 9, which lies in the designated as honeycomb corrugated board plane 10 main plane. The honeycomb corrugated board 1 is substantially characterized in that the channels 7 extend transversely, in particular perpendicular to the plane 10, whereas the channels 7 in the starting block 2 run parallel to the block plane 5. The main advantage of the honeycomb corrugated board 1 is that it has a high rigidity in several directions in space. First, it is particularly stable against forces acting perpendicular to the plane 10. In addition, it has a good rigidity in bends about axes that lie in the plane 10. As honeycomb corrugated board 1 in the sense of this application is in broadest sense understood a cellular material in which the channels 7 extend transversely to the main plane 10. To a higher resistance of the honeycomb corrugated cardboard 1 against external influences, such. As moisture to produce, the honeycomb corrugated cardboard 1 can be made of laminated with plastic and / or wax and / or impregnating means 3, 4 or the produced honeycomb corrugated cardboard 1 are subsequently coated with plastic. Furthermore, the webs 3, 4 may consist of paper and / or plastic and / or glass-fiber-reinforced material webs. The term corrugated board or block made of corrugated cardboard within the meaning of the application is therefore to be understood in the broadest sense so that the webs of which the corrugated board is made of paper and / or cardboard and / or plastic and / or glass fiber reinforced webs may exist. In principle, other flexible materials that can be processed accordingly, also included.

One, in Fig. 1 illustrated apparatus for producing honeycomb corrugated cardboard 1 has along the transport direction 8 arranged one behind the other a cutting device 11 for cutting strips 12 from a block 2. Downstream of the cutting device 11 is a transport device 13 for transporting the strips 12 along the direction 8 to a gluing device 14 and on to a downstream corrugated strip-turning device 15.

The cutting device 11 has a block feeding device 16, consisting of a lower endless conveyor belt 17, which is deflected at its two ends in and against the direction 8 about two deflection rollers 18, 19, wherein the deflection Roller 19 is driven via a motor 20 and a drive belt 21. Above the transport belt 17 and parallel to this another transport belt 22 is arranged, which is deflected by deflection rollers 23 and 24, wherein the deflection roller 24 is driven via a motor 25 by a drive belt 26. The upper conveyor belt 22 is vertically adjustable together with the deflection rollers 23 and 24 via a height adjustment device 27 in the vertical direction, this being possible for example by a spindle drive. By the height adjustment device 27, the gap formed between the conveyor belts 17 and 22 28 can be adjusted in height and thus adapted to the thickness of the block 2. Instead of over the entire width of the block 2 extending transport belts 17, 22 can, as in Fig. 4 shown, even several, evenly distributed over the width of the block 2 bands 17, 22 are used.

The cutting device 11 has above the block feeding device 16 a relative to a machine frame supported, horizontal, perpendicular to the direction 8 extending cross member 29, which is height adjustable via a height adjustment device 30. On the cross member 29, a carriage 31 is guided transversely to the direction 8 slidably. The transverse displacement takes place via an endless toothed belt 32, which is deflected at the transverse ends via two rollers 33, 34. The roller 33 is rotatably driven by a motor 35. The carriage 31 is fixedly connected to the upper part 36 of the toothed belt 32, so that a pivoting of the roller 33 leads to a transverse displacement of the carriage 31. At the lower part of the carriage 31, this has a rotatably mounted on this shaft 37. At its end pointing in the direction 8, the shaft 37 carries a roller 38 around which the lower part of the toothed belt 32 is guided. At the other end, the shaft carries a circular blade 39. Above the roller 38, two further deflection rollers for the toothed belt 32 are arranged on the carriage 31, which are not shown. All rollers 32, 34, 38 have tooth-shaped recesses on, which engage in the teeth of the toothed belt 32, so that a slip-free settlement can take place. The rotary driven circular blade 39 cuts from the block 2 strips 12.

In the direction 8 behind the block feeding device 16, the transport device 13 begins. This has a support against the ground via supports supported work table 40, which extends to the device 15. In the work table 40 numerous parallel to the direction 8 extending rows of holes 41 are provided which lead to underlying vacuum channels 42 and are open to the top of the work table 40 out. The channels 42 are all connected to a vacuum generator 43. Due to the negative pressure at the free end of the holes 41 are guided over strips 12 precisely held on the work table. Under the work table 40 are numerous juxtaposed, parallel to each other, transport belts 44, which are deflected by deflection rollers 45, 46, wherein the roller 45 is driven by a motor 47. As in Fig. 4 can be seen, transversely to the direction 8 numerous, for example, 20, parallel to each other transport belts 44. These are in Fig. 4 only visible because the worktable is broken up at the appropriate places. The juxtaposed conveyor belts 44 are independently drivable. Each transport band 44 carries at least one carriage 48. Each carriage 48 has an upward z. B. pneumatically controlled push-out pin 49. Above the conveyor belts 44, the work table 40 parallel to the direction 8 extending through longitudinal grooves 50, in which the extended pins 49 along the direction 8 are displaceable. The pins 49 are dimensioned so that they lie in the retracted state below the work table 40 and in the extended state above the top of the work table 40, for example several centimeters above it so that they can be used to transport the strips 12. All transport belts 44 are height adjustable together with the carriage 48 via two height adjustment devices 51, 52 which are below the belts 44 on a frame 53 carrying the belts 44 and rollers 45, 46. Both Fig. 1 to 7 For example, the slides 48 are all shown in the same drawing plane as if they were on the same transport tape 44. This is a graphical simplification. In fact, the carriages 48 each sit on different conveyor belts 44 arranged one behind the other, which can be controlled independently of one another.

The gluing device 14 has a base 54 supported against the ground. At this and above it is hinged via a hinge 55, an upper support means 56. The hinge 55 is located at the end 8 located in the direction of the support means 56. At the opposite end of the direction 8 a height adjustment device 57 is arranged on the frame 55, the device 56 via one or more vertically extendable pins 58 around the joint 55 can pivot. In the support device 56 is a glue-applicator roller 59, the axis 60 is horizontal and perpendicular to the direction 8, rotatably mounted. In Fig. 6 right above the roller 59 is a likewise rotatably mounted squeezing roller 61 with an axis 62 which is parallel to the axis 60. The surface of the roller 61 is in direct contact with the surface of the roller 59, the gap between the two being adjustable to meter a amount of glue on the roller 59. The rollers 59 and 61 are rotatably driven by a drive belt 63 which is guided around the shaft 64 of a motor 65, about a shaft 66 of the roller 59, a shaft 67 of the roller 61 and a deflection roller 68. Between the rollers 59 and 61 is above this a substantially triangular Room 69 is formed, which is filled with glue. Transverse to the direction 8, the space 69 is limited on both sides by glue banks, not shown, whose contour is adapted to that of the rollers 59 and 61 in the triangular space. The glue dams can be displaceable transversely to the transport direction. By height adjustment means 57, the gap 70 between the lowermost point of the roller 59 and the top of the strip 12 is adjustable, so that an optimal gluing the top of the strip 12 is ensured.

The corrugated-strip turning device 15 has a relative to a frame 71 supported, rotatably driven rotatably mounted turning roller 72 with an axis 73 on. The roller 72 is rotatably driven via a drive belt 74 via a motor 75. The turning roller 72 has a plurality of evenly distributed over the width of the roller 72, spaced-apart rings 76 which are fixedly connected to the jacket 77 of the roller 72. In the rings 76 extending parallel to the axis 73 webs 78 are inserted into corresponding grooves 79 and fixedly connected to the respective ring 76, for example screwed, glued or welded. An advantage is when the webs 78 are removably attached. In the present case 76 three uniformly distributed over the circumference, ie offset by 120 ° to each other webs 76 are arranged per ring. The ridges 78 on the various rings 76 are all at the same angular height, ie, they are aligned with each other in the direction of the axis 73. The ridges 78 carry numerous outwardly projecting needles 80. The needles 80 are arranged, for example, on a 2 x 15 matrix , The needles 80 are made of steel and pointed at their radial outer end. Typically, the needles protrude by 3 mm to 10 mm, preferably 5 mm, from the top of the ridge 78. The needles 80, relative to a rotational direction 81, are not exactly radially outward, but counter to the direction of rotation 81. They thus enclose an angle b with a radius through the axis 73, for which the following applies: 70 ° ≤ b ≤ 110 °, preferably b ≈ 80 °. This facilitates the stripping of the impaled strips 12. In Fig. 1 right above the roller 76 is a horizontally extending, across the width of the roller 76 extending beam 82, which has a widened surface 83 at its front, lying in the direction 8 end. The beam 82 is controlled by a counter to the direction 8 arranged pneumatic device 84 along and against the direction 8 displaced. In the direction 8 immediately above the roller 72 and behind the highest point is a, over the width of the roller 72 extending stripping plate 85. The plate 85 has opposite to the direction 8 a front stripping edge 86 which by rectangular recesses 87 is interrupted. The recesses 87 are located relative to the axial direction 73 at the locations where the roller 72 carries the rings 76 with the needles 80. In this way, the scraper edge 86 can be arranged as close as possible to the top of the roller 72, without causing a collision with the needles 80. Above the stripper plate 85 is located as in Fig. 1 This has a hinged to a hinge 89 plate 90 which is adjustable in height at its opposite the direction 8 end by pneumatic cylinders 91, so that the Tilt angle of the plate 90 is adjustable. In the direction 8 immediately behind the stripping plate 85 is an endless, driven, about two deflecting rollers 92, 93 deflected transport belt 94. The roller 92 is rotationally driven by a motor 95. Above the transport belt 94 is a second conveyor belt 96 arranged parallel thereto, which is deflected about deflecting rollers 97, 98, wherein the roller 97 is driven by a motor 99. Between the conveyor belts 94 and 96, a gap 100 is formed, in which the produced honeycomb corrugated cardboard 1 is transported in the direction 8. The transport belt 96 and the deflection rollers 97 and 98 are fastened to a common frame 101, which is height-adjustable via height adjustment devices 102, 103. In this way, the width of the gap 100 is adjustable and adaptable to the respective thickness of the honeycomb corrugated cardboard 1.

In direction 8 is behind the device 15, a cutting device, not shown, for producing sheets of honeycomb corrugated cardboard 1, as is generally the case of corrugated cardboard plants, for example from the DE 103 12 600 A1 , is known. The sheets are stacked in a stacker, not shown.

The operation of the apparatus for producing honeycomb corrugated cardboard 1 will be described below. The block feed device 16 is fed with a block 2 of corrugated sheets glued together, wherein advantageously the uppermost web of the block 2 is a corrugated web 3 and the lowermost web of the block 2 is a cover web 4. The channels 7 in the block 2 all run parallel to one another, horizontally and along the direction 8. The transport belts 17 and 22 transport the block 2 without slip along the direction 8, but can also move the block 2 counter to the direction 8. As soon as the front edge of the block 2, which is in the direction 8, reaches the height of the circular blade 39, a plurality of pins 49 are extended uniformly over the width of the work table 40 and rest on the front side of the block 2. Subsequently, strips 12 are cut out of the block 2 by the circular blade 39, whereby after each cut the block 2 is advanced by the belts 17, 22 by a certain distance and the extended pins 49 which rest against the front side of the block 2 follow accordingly , After the completion of each feed, another cut is made through the Circular knife 39 performed, creating another strip. After a certain number of cuts, for example 20 cuts, the block 2 is retracted by the belts 17, 22 counter to the direction 8. Following this, pins 49 are extended by associated carriages 48 immediately behind the rearmost disc 12, so that the group of adjacent strips 12 is bounded by pins in and counter to the direction 8, as for example in FIG Fig. 3 is shown. The thus formed cluster 104 of juxtaposed strips 12 is now moved along the direction 8 by the synchronous movement of the associated carriages 48. The cluster 104 is passed under the size coat roller 59, which glues the upper tips of the topmost corrugated sheet 3. An advantage of gluing the tips of the corrugated web 3 is that less glue must be used than if the cover sheets 4 were glued. By gluing the tips of the corrugated sheets 3 glue is applied only where it is required later. The glue passes from the space 69 through the gap between the rollers 59 and 61 to the gluing gap 70. Subsequently, the cluster 104 is transported in the direction 8 to the corrugated strip-turning device 15. The roller 72 is located in the in Fig. 7 shown position, ie the needles 80 are located immediately above the work table 40. The frontmost in the direction 8 strip 12 is pushed by the extended pins 49 at the rear end of the cluster 104 on the needles 80. Previously, the pins 49 which bounded the cluster 104 at the front end were retracted. If the push-on force which can be applied by the pins 49 at the rear end of the cluster 104 is insufficient for pushing a strip 12 onto the needles 80, the rear pins 49 can also be retracted. In their place would then be an unillustrated bar is used, which pushes the cluster 104 over the full width of the roller 72 on the needles 80. After pushing a strip 12 onto the needles 80, the roller 72 is rotated along the direction of rotation 81 until the impaled strip 12 comes into contact with the stripper edge 86, which pulls the strip 12 from the needles 80. The engaged needles 80 are rotated through the recess 87 and disengaged from the strip 12. Subsequently, the now turned by 90 ° strip 12 is moved by the beam 82 in the direction 8 on the plate 85 and pressed against the front strip 12 and glued to it. This creates a theoretically endless web of honeycomb corrugated board 1. In Fig. 10 two strips 12 of the block 2 are glued together. The produced honeycomb corrugated board 1 is transported away in the direction 8 by the transport belts 94 and 96, later cut into sheets and stacked.

As already explained at the beginning, the honeycomb corrugated board 1 has numerous advantageous properties. It has a high stability against forces perpendicular to the plane 10. The honeycomb corrugated board 1 can be used as insulation material, building materials, etc. It has a relation to the occupied external volume very low weight.

Claims (7)

1. Machine for producing corrugated honeycomb cardboard (1), the machine comprising

   a. a block supplying device (16) for supplying blocks (2) of corrugated cardboard along a direction of conveyance (8);

   b. a cutting device (11) for cutting strips (12) from a block (2) of corrugated cardboard;

   c. a gluing device (14) for applying glue to at least one side of the strips (12);

   d. a corrugated-cardboard-strip turning device (15) for changing the spatial orientation of the strips (12); and

   e. a joining device (82, 84) for adhesively joining the strips (12) together to form corrugated honeycomb cardboard (1);

   f. wherein the corrugated-cardboard-strip turning device (15) comprises a turning roller (72);
   characterized in that

   g. the turning roller (72) is provided with outwardly projecting needles (80) on its surface.
2. Machine according to claim 1, characterized in that the blocks (2) of corrugated cardboard comprise channels (7) which are parallel to the direction of conveyance (8).
3. Machine according to claim 1 or 2, characterized in that the cutting device (11) comprises a knife (39) which is displaceable crosswise to the direction of conveyance (8).
4. Machine according to one of the above claims, characterized in that a conveyor device (13) is provided for conveying clusters (104) of strips (12).
5. Method of producing corrugated honeycomb cardboard (1), the method comprising the following steps:

   a. providing a block (2) of multilayer corrugated cardboard;

   b. cutting strips (12) from the block (2);

   c. applying glue to the strips (12) on at least one of the sides thereof;

   d. pressing the strips (12) onto the needles (80) of a turning roller (72);

   e. changing the spatial orientation of the strips (12); and

   f. stripping the strips (12) off the needles (80) and

   g. joining the strips (12) together to form corrugated honeycomb cardboard (1).
6. Method according to claim 5, characterized in that the change of the spatial orientation of the strips (12) consists in a rotation through 90°.
7. Method according to claim 5 or 6, characterized in that the strips (12) are moved in clusters (104).

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