EP3126131B1 - Procédé et dispositif de formage d'un matériau sous forme de bande plate continue - Google Patents

Procédé et dispositif de formage d'un matériau sous forme de bande plate continue Download PDF

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Publication number
EP3126131B1
EP3126131B1 EP15700664.4A EP15700664A EP3126131B1 EP 3126131 B1 EP3126131 B1 EP 3126131B1 EP 15700664 A EP15700664 A EP 15700664A EP 3126131 B1 EP3126131 B1 EP 3126131B1
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EP
European Patent Office
Prior art keywords
dies
holding
web material
flat web
shaping
Prior art date
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Active
Application number
EP15700664.4A
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German (de)
English (en)
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EP3126131A1 (fr
Inventor
Martin Fach
Rainer Kehrle
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Foldcore GmbH
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Foldcore GmbH
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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
    • B31F1/30—Tools secured to endless chains, e.g. toothed belts; combined with uniting the corrugated web to flat webs
    • B31F1/305—Tools secured to endless chains, e.g. toothed belts; combined with uniting the corrugated web to flat webs with sets of interengaging tools each secured to endless chains
    • 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
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D3/00—Making articles of cellular structure, e.g. insulating board
    • B31D3/002—Methods for making cellular structures; Cellular structures
    • 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
    • B31F1/0003—Shaping by bending, folding, twisting, straightening, flattening or rim-rolling; Shaping by bending, folding or rim-rolling combined with joining; Apparatus therefor
    • B31F1/0006—Bending or folding; Folding edges combined with joining; Reinforcing edges during the folding thereof
    • B31F1/0009—Bending or folding; Folding edges combined with joining; Reinforcing edges during the folding thereof of plates, sheets or webs
    • B31F1/0019—Bending or folding; Folding edges combined with joining; Reinforcing edges during the folding thereof of plates, sheets or webs the plates, sheets or webs moving continuously
    • B31F1/0022—Bending or folding; Folding edges combined with joining; Reinforcing edges during the folding thereof of plates, sheets or webs the plates, sheets or webs moving continuously combined with making folding lines
    • B31F1/0025—Making the folding lines using rotary tools

Definitions

  • the invention relates to a method for forming a flat sheet material and a device suitable for its implementation.
  • the deformed flat web material should give a three-dimensional structure, as it can be advantageously used in the composite construction, in particular as a core material between two stable layers.
  • the invention has for its object to provide an aforementioned method and a corresponding device with which problems of the prior art can be solved and it is particularly possible to reshape a flat web material well and practical.
  • a flat web material in the initial state is largely flat or smooth and even. It can also be finely wavy, similar to a fine corrugated cardboard or the like it may also be pre-stamped along the later folded edges or pretreated in a similar manner, for example, with appropriate material weakenings by perforations or the like., It may also be grooved.
  • the material is folded as a quasi-end product of the process in a regular, three-dimensional structure.
  • a plurality of folds are provided along differently oriented fold lines, preferably with the fold lines running along a small number of directions, for example along two to a maximum of five directions.
  • it may be a wave-shaped folding geometry, that is wavy in plan view instead of straight fold lines.
  • the flat web material For forming the flat web material, it is inserted between a lower holding die and an upper holding die or they are created.
  • These two holding matrices consist of flat material, ie originally flat material, and have crease lines, wherein these crease lines are identical in the two holding matrices and lie largely exactly above one another when they rest against the flat web material or enclose it between them.
  • the holding matrices are advantageously made of identical material, which is advantageous but significantly stiffer than the flat web material to be formed.
  • the flat material of the holding matrices can very often be bent or deformed and thereby, as will be explained, the flat sheet material with. Under certain circumstances, the fold lines can also be formed by hinges.
  • the lower and / or upper holding die can be successively brought to the flat web material or brought together with this, but advantageously at the same time.
  • a lower forming die from below and an upper forming die are brought from above onto the holding dies.
  • the forming dies also consist of a flat material with predetermined bending lines.
  • they may consist of a similar or the same material as the aforementioned holding matrices and along the bending lines in the manner of hinges or the like. be deformed frequently.
  • the material is significantly more rigid, preferably by an increased material thickness, for example, twice to five times as thick.
  • the holding matrices are largely or completely flat when they are brought to the flat web material or enclose it between them. They are also still advantageous if in a further step the forming dies are brought to the holding dies. In this case, the mold matrices can be introduced in succession, advantageously they are introduced simultaneously.
  • the lower and the upper mold die have bending lines that correspond exactly to each other or exactly opposite each other. Furthermore, the molding dies are not flat when approaching the holding dies, but are erected by bending along the bend lines or have a shape that corresponds to or at least is similar to the three-dimensional structure to be created with the flat sheet material. At least part of the bending lines of the forming dies coincide with a part of the bending lines of the holding dies. These are advantageously those bending lines of the forming dies, which are oriented towards the holding dies or point towards them and can rest against them.
  • the bringing of the molding dies to the holding matrices or to the closely superimposed composite of the two holding matrices with the flat web material to be deformed therebetween has the advantage that the folds on the flat web material with the fold lines are precisely defined by the holding matrices resting on the flat web material with the predetermined bending lines can be performed.
  • the forming dies may rub along it, and the material of the holding dies and the forming dies may be selected such that the surfaces are very smooth and the materials are dimensionally stable with some rigidity, particularly the forming die.
  • a kind of defined and protected deformation of the flat web material can take place between the holding matrices, which is triggered and forced by the forming matrices.
  • the forming dies retain their shape, namely as erected three-dimensional structure similar to the product to be produced with the flat web material.
  • the holding matrices with the flat web material can be gradually brought into the shape of the molding dies between them gradually in the passage and thus also the flat web material to be formed.
  • a plane located in the middle between the forming matrices that is to say a continuous plane, is not yet touched by the forming matrices, not even by their furthest protruding points or areas.
  • the forming dies are moved ever closer to each other, with elevations of the forming dies along bend lines of one forming die engaging recesses along bend lines of the other forming die. In this case, elevations and depressions are always adjacent to one another or are formed in each case by two bending lines extending next to each other.
  • the holding dies are deformed with the flat web material therebetween or set up in a corresponding shape, resulting in elevations and depressions along the bending lines and thus along the bending lines of the holding dies or be formed.
  • the fold lines of the flat web material along the bending lines and bend lines or the flat web material is folded here. Since the holding matrices along the fold lines are, so to speak, sharply kinked or folded, the holding matrices are precisely defined by the corresponding sharp edges or burrs and sharp folded fold lines are produced in the flat web material.
  • the compression of the mold matrices toward each other with the composite of holding matrices and flat web material therebetween takes place gradually, as explained above, gradually becoming stronger.
  • the matrices are advantageous in each case elongated.
  • the compression of the molding dies can be carried out in a continuous process along a web or continuous web.
  • a plurality of pressure means or deformation means arranged one behind the other along the track can be provided, which are preferably formed circumferentially.
  • the pressure means may be rotating rollers, round brushes or band-like circulating pressure medium or deformation bands.
  • a passage height between pressure means, which are arranged consecutively in the passage direction, can decrease, in particular by up to 15% of the passage height per pressure medium or band.
  • the mold matrices intermesh or be pressed into each other, while they just cause the deformation of the holding matrices and their placement and the deformation and erection of the flat web material therebetween.
  • the mold matrices may interlock 25% to 50% or even 75% of their height, such that the overall height of the array of forming dies, holding dies and flat sheet material is between 175% and 125% or even only 110% of the height of a single forming die.
  • the molding matrices can be relatively stiff or stable, also along the bending lines provided there, especially if they rest against the holding matrices.
  • a vibrating device is provided or it is shaken to the arrangement, and that after bringing the forming dies to the holding dies to the touch. Furthermore, this should precede the substantial deformation of the retaining matrices take place, for example, before they have reached 10% or 20% of their desired height of the finished structure of the flat web material.
  • the holding matrices and / or the forming dies are not simply formed on a surface somehow, for example in the manner of press plates or the like, but as long tapes. It is advantageous peripheral strips, so almost endless belts.
  • the length of these bands should be more than twice the length of the passageway for the flat web material to be formed, so that they can orbit at the beginning and at the end of this passageway of sufficiently large radius without being damaged.
  • it can also lead to a substantial shortening, especially the holding matrices, for example by up to a factor of 2 to 10.
  • a corresponding length to calculate is corresponding length to calculate.
  • the advantage of such matrices in the form of bands or even circumferential bands is that longer pieces of the flat sheet material can be reshaped, even endless flat sheet material in circumferential bands. Furthermore, a continuous in-line process can be performed for high throughput and the best possible result of the regular, three-dimensional structure created from the flat web material.
  • the bands of the holding matrices may extend directly adjacent to the through-path at the top and bottom, and in each case on the outside, however, the bands of the forming matrices run around the inside. In the case of circulating, closed endless belts of one of the dies or both dies, the bands of the holding dies can circulate around the bands of the forming dies or surround them.
  • a synchronization between the upper mold die and the lower mold die made become.
  • This can be considered as a continuation of the aforementioned synchronization of the holding matrices to each other and possibly to the flat web material.
  • the aforementioned synchronization means may also be provided, advantageously via control motors or via rotating synchronization means or synchronization belts with an external shaping corresponding to the structure or shape of the molding die.
  • a synchronization synchronizes both matrix pairs and also the flat web material at once, alternatively it can also be synchronized individually. This can also mean that not even the matrices of a pair are synchronized at once. Thus, the process can be carried out very easily without large investment costs.
  • lateral pressing means are provided on the side, in a continuous process preferably on the longitudinal sides of a continuous web of the flat web material, the holding matrices with the flat web material between them and / or the forming dies with the holding matrices and the flat web material between squeeze each other sideways.
  • Such lateral pressing means can be constructed relatively simply compared to pressing means on the top or the bottom, namely, they need not have the form erected corresponding form. It may simply be inclined bands or closer arranged rear wheels or wheels and guides, preferably baffles or rails.
  • the forming dies are first removed. Then an even stronger deformation can take place, especially between the holding dies. Thereafter or later, the holding matrices are then removed or removed. This can already be a few centimeters in a previously mentioned continuous process for example, 5 cm to 50 cm thereafter. By a separate detachment, however, the fact can be taken better account of the fact that the mold matrices are stiffer and thus behave slightly differently than the holding matrices.
  • the generated three-dimensional structure in the flat web material is characterized in that it has elevations and depressions along fold lines, which are, so to speak, sharply folded or form acute angles, advantageously with an angle between 10 ° and 150 ° on both sides of the fold, especially advantageously between 20 ° and 120 °.
  • the bend lines extend at ridges of the forming dies along crease lines of the holding dies and fold lines of the flat web material.
  • the bend lines protrude along ridges as the only areas of the forming dies and abut against the retaining dies. This only applies to the projection in the plane of symmetry, the crease lines of molding dies on one side and holding dies or the flat sheet material on the other side do not all touch each other.
  • engaging conveying means can be provided which promote the combination of holding matrices and flat web material not only along a passage path in the direction of passage, advantageously by means of a form fit, but also in the passage direction.
  • This funding can be circumferential and have an outer structure or shape that can engage in the final shape of the flat web material in the final state as a three-dimensional structure.
  • an aforementioned upsetting in width can also take place. Because the mold matrices are already removed at this time, which are difficult to deform in width and / or length, this deformation of the composite of holding matrices and flat web material between them can be done easily and with less force.
  • the flat web material is at least in the final state as a three-dimensional structure in one layer. It is possible, several layers of a flat web material, especially if it is thin and easy to fold like paper, for example, two to four such layers bring each other between the holding matrices and then bring it and with the forming matrices as described above in a three-dimensional structure with multilayered lying on each other. Then, the individual layers can be separated from each other, so that, for example, two to four structured strips can be produced with a single forming step. After an at least largely preforming these can then be further deformed with the aforementioned means, in particular by upsetting in the longitudinal direction and / or in width, which is then easily possible due to the predetermined fold lines. So the throughput can be increased altogether.
  • a flat web material may have a multilayer structure, for example for a higher material rigidity or to combine certain functional layers with one another.
  • a multilayer structure for example for a higher material rigidity or to combine certain functional layers with one another.
  • the material for the flat sheet material paper or the like material of fibers may be used.
  • homogeneous films made of plastic can be used as well as metal foils.
  • the thickness should be selected so that the flat web material can easily fold, so usual paper thickness or thickness and metal foils thicknesses below 0.2 mm.
  • a device 11 according to the invention is shown for forming a flat web material 12, which of a material supply 13 in the form of a large roll or the like. comes.
  • the flat web material 12 runs in the FIG. 1 from right to left through the dotted plane D shown in dotted lines on the left and right.
  • the flat web material 12 can be one of the aforementioned, for example paper, but also thinner plastic than film material or thin web material, as well as metallic materials such as thin aluminum foil and composite materials. It may even, as mentioned above, be slightly wavy with a corrugation between 0.5mm and 3mm.
  • the flat web material 12 passes through an optionally provided embossing device 15.
  • an optionally provided cutting device 16 which performs a cross section.
  • the quasi endless running flat web material 12 can be separated into specific or desired lengths.
  • the flat web material 12 may also be supplied in the form of individual sheets.
  • one or two longitudinal cutting devices can also be provided in order to cut the flat web material 12 also in width.
  • the flat web material 12 passes through a feed area 18.
  • an upper holding die 20a and a lower holding die 20b are supplied simultaneously from above and below or symmetrically to the continuous plane D, alternatively also successively.
  • These holding matrices 20 run around in large, largely dashed loops and are formed as previously mentioned endless belts. For this they consist of a correspondingly stable plastic material. Combinations of different materials are also conceivable, for example metal and plastic, or purely of metal with hinges or the like.
  • the holding matrices 20a and 20b can be brought to the flat web material 12 in a flat or smoothed form.
  • corresponding smoothing means advantageously pressed against each other rollers, be provided between the very left end of the device 11 and the supply area 18.
  • the holding matrices 20a and 20b in the supply area 18 should be largely flat or flat against the flat web material 12. This may possibly be something out of the flat shape transformed out.
  • the upper forming die 30a and the lower forming die 30b are introduced. These are loop-like continuous endless belts with a largely punctiform represented course. In this case, corresponding guide devices or guide rollers, not shown here, are provided. Unlike the holding matrices 20a and 20b, the forming matrices 30a and 30b are not introduced in a substantially flat form, but, as shown, in an erected form, namely they advantageously change their shape only slightly, for example the aforementioned 2% to 15%. As will be shown in magnification below, the forming dies 30a and 30b bear against the outer sides of the holding dies 20a and 20b with their points facing each other or protruding areas.
  • the composite of flat web material 12, adjacent thereto holding matrices 20a and 20b and in turn adjacent molding matrices 30a and 30b moves in a continuous process to the left and is guided into an optionally provided synchronization device.
  • the matrices and the flat web material can also be synchronized one after the other. This can mean that the synchronization coincides with the feed area 18 and the matrices with the flat material are synchronized in pairs or else one after the other before another matrix or another pair of matrices is introduced.
  • An additional synchronization is important or advantageous for the holding matrices with the material, so that the optional stamping lines coincide with the folding lines of the matrices.
  • the synchronization can also by rollers, vibrators or the like.
  • the configuration of the synchronization device shown here comprises an upper synchronization band 41a and a lower synchronization band 41b, which serve to form the matrices synchronize with each other and bring into the corresponding desired relative position to each other and possibly to the flat web material, in particular the upper and the lower forming die 30a and 30b.
  • the synchronization belts 41a and 41b may have protruding elevations or points which engage in the outer sides of the forming dies 30a and 30b in such a positionally accurate or precise position that they can be positioned relative to one another as desired.
  • the synchronization device 40 is followed by a vibrator device 43, which is also provided only as an option.
  • This can be made of, for example, elastic pressure jaws or the like. exist, which not only further compress the composite, but also longitudinally and / or transversely to the direction of passage, the matrices 20a and 20b and 30a and 30b position each other.
  • a slight deformation of the holding matrices 20a and 20b with the flat web material 12 may possibly already take place between them in accordance with bending lines in the holding matrices.
  • an upper first deformation band 46a and a lower first deformation band 46b rotate around, as well as in magnification in the Fig. 2 and 3 is shown.
  • Deformation belts 46a and 46b are substantially flat and press molding dies 30a and 30b towards each other as shown in enlargement there. They correspond to the pressure means mentioned above.
  • the first deformation region 45 is adjoined by a so-called first contraction region 48, which, although optional, should be advantageously provided.
  • first contraction region 48 which, although optional, should be advantageously provided.
  • the bond between the first deformation region 45 and a subsequent second deformation region 50 is quasi braked and thereby compressed or shortened. This causes at the same time, as shown in the following illustrations, a stronger deformation of the flat web material and the holding matrices 20a and 20b by stronger setting or removal from the continuous plane D.
  • the composite passes through a second deformation region 50, in which, similar to the first deformation region 45, an upper second deformation band 51a and a lower second deformation band 51b are provided.
  • a second deformation region 50 in which, similar to the first deformation region 45, an upper second deformation band 51a and a lower second deformation band 51b are provided.
  • These may be formed identically to the deformation bands 46a and 46b of the first deformation region 45, but alternatively according to the other of the two basic possibilities of the Fig. 2 and 3 , How out Fig. 1 it can be seen, the matrices 20a and 20b and 30a and 30b, together with flat web material 12 therebetween in the second deformation region 50 are positioned stronger and thus more deformed.
  • the Distance of the second deformation bands 51a and 51b to each other should also be slightly less than that of the first deformation bands 46a and 46b.
  • a first lift-off area 53 can follow, in which the forming dies 30a and 30b are lifted off and thus removed from the holding dies 20a and 20b by respective removal, in which case aforementioned deflection rolls or the like. can be provided.
  • a subsequent third deformation zone 55 upper and lower third deformation bands 56a and 56b are again provided, which hold and transport the holding dies 20a and 20b with the flat web material 12 between them, possibly deforming them.
  • Behind the third deformation region 55 follows a fourth deformation region 60 with an upper fourth deformation band 61a and a lower fourth deformation band 61b.
  • the areas 55 and 60 are deformation areas, but their main task is to ensure the speed difference by conveying the dies and the flat material at different speeds so that the contraction area 58 functions.
  • a second contraction region 58 may be provided, in which the continuous composite is further decelerated and thus shortened and set up or deformed more.
  • the area between 50 and 55 may additionally also be a contraction area.
  • the deformation bands 56a and 56b or 61a and 61b can be largely flat on their upper side with a rubberized or easy-grip surface, in order to grasp and transport the outer holding matrices 20a and 20b in good frictional engagement. Alternatively, elevations and / or recesses may be provided for a positive transport. While in the deformation regions 45 and 50, the external pressure on the composite was important because it caused a stronger reshaping of the holding matrices 20a and 20b with the flat web material 12 between them, the pressure in the deformation regions 55 and 60 should not be too great. otherwise he squeezes the holding matrices 20a and 20b with the flat web material 12 between them again. There may be other deformation areas or contraction stages follow, even after lifting the holding matrices.
  • the holding dies 20 a and 20 b are lifted off or removed from the flat web material 12.
  • the flat web material 12 may then have its final structure or shape, as in the Fig. 1 can be seen on the far left, and for which on the 4 to 13 is referenced.
  • a cutting device 65 may be provided, especially if no provided at the beginning is. Otherwise, the deformed flat web material 12 'can be transported further for a use mentioned above, in particular for component in sandwich construction. Under certain circumstances, however, a further deformation of the flat web material 12 can generally take place even after the holding matrices have been lifted off, for example by being compressed in the length and pressed in the width. As another possibility, a curing area, an annealing range or the like. consequences.
  • Fig. 2 is shown in magnification a first embodiment possibility of the first deformation region 45 with the upper first deformation band 46a and lower first deformation band 46b.
  • the first deformation bands 46a and 46b have a uniform spacing over their length and thus press against the outer ridges 34a and 34b of the upper molding die 30a and the lower molding die 30b, respectively.
  • This causes the right-made composite of flat strip material 12, holding matrices 20a and 20b is compressed even more strongly, namely right at the beginning of entering the first deformation region 45 and between the first deformation bands 46a and 46b and also in the second deformation region 50th with the bands 51a and 51b.
  • the distance between the upper and lower deformation band can again be slightly smaller than shown here.
  • first deformation region 45 'acc. Fig. 3 The mutually facing sides of the upper first deformation band 46a and the lower first deformation band 46b are not parallel to each other, but obliquely or their distance decreases slightly in the direction of passage from right to left, advantageously by 1% to 5% or even 15%.
  • the clearance height is simply lower.
  • the burrs 34a and 34b of the forming dies 30a and 30b bear on the first deformation bands 46a and 46b.
  • the subsequent deformation range is designed as well as the here in Fig. 3 illustrated first deformation region 45 ', that is, for a virtually starting at zero uniform deformation.
  • the combination of the deformation areas, as in Fig. 2 and 3 was not explicitly sketched but is also conceivable.
  • the aim of the invention is to illustrate in three steps how the deformation of the flat web material 12 in the end, but also of the holding matrices 20a and 20b, by the forming matrices 30a and 30b becomes increasingly strong.
  • Fig. 4 is in the x-direction, which is transverse to the direction of passage through the device 11, yet no significant deformation of the flat web material 12 and the voltage applied to it holding matrices 20a and 20b recognizable.
  • a first deformation is already clearly visible, so that the composite of flat material 12 and holding matrices 20a and 20b is slightly waved in this direction.
  • a deformation in the y-direction always goes with a deformation in the x-direction, but they are possibly pronounced differently strong.
  • the x-direction is longitudinal to the direction of passage.
  • fold lines 14 and 14 'of the flat web material 12 are already shown here for clarity, as well as buckling lines 22a and 22b of the holding matrices 20a and 20b.
  • the forming dies 30a and 30b have ridges 34a and 34b in mutually projecting directions with corresponding recesses 36a and 36b facing each other. These are each formed by bending lines 32a and 32b.
  • the depressions 36a and 36b press into the composite of flat web material 12 and holding dies 20a and 20b. It can be seen how the depressions 36a and 36b extend exactly along corresponding fold lines 22a and 22b of the holding matrices 20.
  • a stronger deformation of the flat web material 12 together with holding matrices 20a and 20b is effected by stronger compression, and now also clearly recognizable in the x-direction along the fold lines 14 and 14 'of the flat web material 12 or along corresponding fold lines 22 of the holding matrices 20a and 20b.
  • the forming dies 30a and 30b with the depressions 36a and 36b lie linearly only along fold lines 22a and 22b of the holding dies 20a and 20b.
  • Fig. 6 an even stronger deformation is shown.
  • the composite of flat web material 12 and retaining matrices 20a and 20b has the same thickness and deformed to the same extent, the molding dies 30a and 30b itself but hardly. In this state could possibly already a lifting of the forming dies 30a and 30b as in the first lift-off area 53 of the FIG. 1 respectively.
  • an even stronger reshaping can take place.
  • the composite of flat web material 12 and retaining matrices 20a and 20b can be deformed more strongly only by further shortening and upsetting with stronger setting up of the deformed flat web material 12 '.
  • FIG. 7 to 13 Various possible embodiments for the deformed flat web material 12 'are shown. On the left is an isometric view, then is a top view from above, then a partial side view and finally the right a flat folding pattern of a quasi-single cell.
  • the embodiments of Fig. 7 to 9 are essentially characterized by zig-zag patterns of the fold lines 14, which form burrs and depressions, respectively. So there are fold lines along two directions with angles of about 90 ° to each other FIGS. 7 and 8 and 45 ° to 60 ° at Fig. 9 , Both Fig. 10 and 11 these are patterns with multiple kinks along burrs and depressions on the fold lines 14, with a total of three instead of two directions.
  • the angles are each about 135 ° at Fig. 10 and about 90 ° and 135 ° at Fig. 11 , In the Fig. 7 is the angle ⁇ about 45 ° to 120 ° and the angle ⁇ about 15 ° to 90 °.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
  • Making Paper Articles (AREA)
  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)
  • Advancing Webs (AREA)
  • Absorbent Articles And Supports Therefor (AREA)

Claims (15)

  1. Procédé de formage d'un matériau sous forme de bande plate (12), dans lequel le matériau sous forme de bande plate dans son état initial est largement plat ou lisse et plan et dans un état final est plié en une structure régulière tridimensionnelle avec une multiplicité de pliages le long de lignes de pliage orientées différemment (14, 14') et avec des élévations et des creux, comprenant les étapes suivantes:
    - on introduit le matériau sous forme de bande plate (12) entre une matrice de maintien inférieure (20b) et une matrice de maintien supérieure (20a), dans lequel les matrices de maintien se composent de matériau plat et présentent des lignes de brisure préformées (22a, 22b), qui sont identiques dans les deux matrices de maintien et le long desquelles les matrices de maintien sont déformables et qui sont exactement superposées, lorsqu'elles sont appliquées sur le matériau sous forme de bande plate (12),
    - on approche une matrice de formage inférieure (30b) par le bas et une matrice de formage supérieure (30a) par le haut vers les matrices de maintien (20a, 20b), dans lequel les matrices de formage (30a, 30b) se composent de matériau plat avec des lignes de flexion prédéterminées (32a, 32b),
    - les matrices de maintien (20a, 20b) sont largement plates lors de l'introduction du matériau sous forme de bande plate (12) et aussi lors de l'approche des matrices de formage (30a, 30b),
    - les matrices de formage (30a, 30b) présentent des lignes de flexion (32a, 32b) se correspondant exactement l'une à l'autre ou exactement opposées l'une à l'autre avec une flexion identique le long des lignes de flexion (32a, 32b), dans lequel les matrices de formage (30a, 30b) ne sont pas plates, mais sont dressées par flexion le long des lignes de flexion (32a, 32b) ou elles présentent une forme correspondant à la structure tridimensionnelle à produire avec le matériau sous forme de bande plate (12), dans lequel au moins une partie des lignes de flexion (32a, 32b) des matrices de formage (30a, 30b) coïncident avec des lignes de brisure (22a, 22b) des matrices de maintien (20a, 20b), en particulier les lignes de flexion (32a, 32b) des matrices de formage (30a, 30b), qui sont orientées ou qui pointent vers les matrices de maintien (20a, 20b) et qui peuvent s'appliquer sur celles-ci.
  2. Procédé selon la revendication 1, caractérisé en ce que dans la suite du procédé les matrices de formage (30a, 30b) conservent largement leur forme et/ou les matrices de maintien (20a, 20b) sont déformées et sont dressées sous forme correspondante avec des élévations et des creux le long des lignes de brisure (22a, 22b) des matrices de maintien.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que lors de l'approche des matrices de formage (30a, 30b) vers les matrices de maintien (20a, 20b), un plan (D) se trouvant au milieu entre les matrices de formage n'est pas encore touché par les matrices de formage (30a, 30b), dans lequel dans la suite du procédé les matrices de formage sont déplacées de plus en plus près l'une de l'autre ou des élévations le long de lignes de flexion d'une première matrice de formage s'engagent dans des creux le long de lignes de flexion (32a, 32b) de l'autre matrice de formage, dans lequel par la compression croissante des matrices de formage (30a, 30b) ou par leur pénétration l'une dans l'autre les matrices de maintien (20a, 20b) avec le matériau sous forme de bande plate (12) entre elles sont déformées ou sont dressées à la forme correspondante avec des élévations et des creux le long des lignes de flexion (32a, 32b) et dès lors des lignes de brisure (22a, 22b) des matrices de maintien (20a, 20b), opération par laquelle les lignes de pliage (14, 14') du matériau sous forme de bande plate (12) sont produites le long des lignes de flexion (32a, 32b) et des lignes de brisure (22a, 22b).
  4. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que l'on effectue une compression des matrices de formage (30a, 30b) en continu le long d'une bande continue (D) avec plusieurs moyens de pression tournants (56a, 56b) disposés l'un derrière l'autre, en particulier des moyens de pression défilant en forme de bande, dans lequel de préférence une hauteur de passage entre des moyens de pression (56a, 56b) se succédant dans la direction de défilement diminue ou devient plus petite, en particulier à raison de jusqu'à 15 % de la hauteur de passage.
  5. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que lors d'une mise en oeuvre du procédé en continu les matrices de maintien (20a, 20b) sont synchronisées avec le matériau sous forme de bande plate (12), de préférence avant l'approche des matrices de formage (30a, 30b).
  6. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que lors d'une mise en oeuvre du procédé en continu, directement après l'approche des matrices de formage (30a, 30b) vers les matrices de maintien (20a, 20b) et leur application l'une sur l'autre, on opère une synchronisation entre la matrice de formage supérieure (30a) et la matrice de formage inférieure (30b), de préférence à l'aide de moyens de synchronisation tournants ou en défilement (41a, 41b) avec une mise en forme extérieure correspondant à la structure ou à la forme de la matrice de formage (30a, 30b), en particulier au moyen de rouleaux avec des élévations à la manière de picots ou de dents.
  7. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que dans l'état atteint peu avant que les matrices de formage (30a, 30b) soit écartées des matrices de maintien (20a, 20b), des lignes de flexion (32a, 32b) le long d'élévations des matrices de formage s'étendent le long de toutes les lignes de brisure (22a, 22b) des matrices de maintien et de toutes les lignes de pliage (14, 14') du matériau sous forme de bande plate (12).
  8. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'après l'écartement des matrices de formage (30a, 30b) des matrices de maintien (20a, 20b), on effectue une déformation supplémentaire ou encore plus forte du matériau sous forme de bande plate (12) entre les matrices de maintien (20a, 20b), de préférence par le transport en position emboîtée au moyen de moyens de transport avec engagement (56a, 56b, 61a, 61b) de l'ensemble composé des matrices de maintien (20a, 20b) et du matériau sous forme de bande plate (12) avec estampage dans la direction de défilement ou avec un raccourcissement longitudinal, dans lequel les moyens de transport (56a, 56b, 61a, 61b) sont de préférence tournants et présentent une structure ou une forme extérieure correspondant à la forme terminée du matériau sous forme de bande plate (12) dans son état final.
  9. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que les lignes de pliage (14, 14') du matériau sous forme de bande plate (12) ne s'étendent exactement que le long de deux ou de trois directions, dans lequel ces directions forment entre elles un angle de préférence compris entre 60° et 120°.
  10. Procédé selon l'une quelconque des revendications précédentes, caractérisé en ce que le matériau sous forme de bande plate (12) dans l'état initial et dans l'état final présente une seule couche ou n'est pas replié sur lui-même.
  11. Dispositif pour la mise en oeuvre du procédé selon l'une quelconque des revendications précédentes, caractérisé en ce qu'il présente une bande en mouvement continu (D), le long de laquelle le matériau sous forme de bande plate à déformer (12) défile, dans lequel une matrice de maintien (20a) et au-dessus de celle-ci une matrice de formage (30a) sont disposées par le haut sur la bande en défilement continu et une matrice de maintien (20b) et en dessous de celle-ci une matrice de formage (30b) y sont disposées par le bas, dans lequel les matrices de maintien (20a, 20b) se composent de matériau plat et présentent des lignes de brisure préformées (22a, 22b), qui sont identiques dans les deux matrices de maintien (20a, 20b) et le long desquelles les matrices de maintien (20a, 20b) sont déformables et sont situées exactement l'une au-dessus de l'autre, lorsqu'elles sont appliquées sur le matériau sous forme de bande plate (12) et dans lequel les matrices de formage (30a, 30b) se composent de matériau plat et présentent des lignes de flexion préformées (32a, 32b) se correspondant exactement l'une à l'autre ou opposées exactement l'une à l'autre avec une flexion identique le long des lignes de flexion, dans lequel les matrices de formage (30a, 30b) sont dressées par flexion le long des lignes de flexion (32a, 32b) ou présentent la structure tridimensionnelle à produire avec le matériau sous forme de bande plate (12), dans lequel au moins une partie des lignes de flexion (32a, 32b) des matrices de formage (30a, 30b) coïncident avec des lignes de brisure (22a, 22b) des matrices de maintien (20a, 20b).
  12. Dispositif selon la revendication 11, caractérisé en ce qu'il est prévu le long de la bande en mouvement continu (D) au moins une zone de déformation (55, 60) avec des moyens de pression (56a, 56b, 61a, 61b) pour la déformation, de préférence au moins deux zones de déformation (55, 60) l'une derrière l'autre.
  13. Dispositif selon la revendication 11 ou 12, caractérisé en ce qu'après l'approche des matrices de formage (30a, 30b) jusqu'au contact avec les matrices de maintien (20a, 20b) et avant la déformation substantielle des matrices de maintien (20a, 20b), il est prévu un dispositif vibrant (43) ou l'ensemble vibre légèrement.
  14. Dispositif selon l'une quelconque des revendications 11 à 13, caractérisé en ce que les matrices de maintien (20a, 20b) et/ou les matrices de formage (30a, 30b) sont des bandes en défilement avec une longueur égale à plus du double de la bande en mouvement continu (D) pour le matériau sous forme de bande plate (12), qui est en particulier une bande longue ou une bande sans fin, dans lequel de préférence les bandes de la matrice de maintien (20a, 20b) tournent respectivement autour des bandes de la matrice de formage (30a, 30b) ou entourent celles-ci.
  15. Dispositif selon l'une quelconque des revendications 11 à 14, caractérisé en ce qu'il est prévu sur le côté, de préférence dans un procédé continu sur les côtés longitudinaux d'une bande en mouvement continu (D), des moyens de pression latéraux pour la compression latérale des matrices de maintien (20a, 20b) avec le matériau sous forme de bande plate (12) entre elles et/ou des matrices de formage (30a, 30b) avec les matrices de maintien (20a, 20b) avec le matériau sous forme de bande plate (12) entre elles.
EP15700664.4A 2014-03-31 2015-01-14 Procédé et dispositif de formage d'un matériau sous forme de bande plate continue Active EP3126131B1 (fr)

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DE102014206083.4A DE102014206083A1 (de) 2014-03-31 2014-03-31 Verfahren zur Umformung eines Flachbahnmaterials und Vorrichtung
PCT/EP2015/050574 WO2015149954A1 (fr) 2014-03-31 2015-01-14 Procédé et dispositif de formage d'un matériau sous forme de bande plate continue

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DE102014206083A1 (de) 2015-10-01
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CN106536180B (zh) 2019-03-19
US20170028667A1 (en) 2017-02-02
CN106536180A (zh) 2017-03-22
JP2017514723A (ja) 2017-06-08

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