EP4230395A2 - Procédé d'assemblage par complémentarité de forme de deux plaques se trouvant en parallèle ainsi que dispositif approprié - Google Patents

Procédé d'assemblage par complémentarité de forme de deux plaques se trouvant en parallèle ainsi que dispositif approprié Download PDF

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Publication number
EP4230395A2
EP4230395A2 EP23157159.7A EP23157159A EP4230395A2 EP 4230395 A2 EP4230395 A2 EP 4230395A2 EP 23157159 A EP23157159 A EP 23157159A EP 4230395 A2 EP4230395 A2 EP 4230395A2
Authority
EP
European Patent Office
Prior art keywords
pressing
panel
press
plate
section
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.)
Pending
Application number
EP23157159.7A
Other languages
German (de)
English (en)
Other versions
EP4230395A3 (fr
Inventor
Lara Schober
Carl David
Alexander Lehmann
Christoph Keller
Oliver Volk
Moritz von Klitzing
Achraf Ben Salem
Manuel Schuster
Daniel VAAS
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.)
Gerhard Schubert GmbH
Original Assignee
Gerhard Schubert GmbH
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 Gerhard Schubert GmbH filed Critical Gerhard Schubert GmbH
Publication of EP4230395A2 publication Critical patent/EP4230395A2/fr
Publication of EP4230395A3 publication Critical patent/EP4230395A3/fr
Pending 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
    • B31F5/00—Attaching together sheets, strips or webs; Reinforcing edges
    • B31F5/02—Attaching together sheets, strips or webs; Reinforcing edges by crimping or slotting or perforating
    • B31F5/027—Attaching together sheets, strips or webs; Reinforcing edges by crimping or slotting or perforating by perforating, e.g. by folding over the partially cut part
    • 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
    • B31B50/60—Uniting opposed surfaces or edges; Taping
    • B31B50/68—Uniting opposed surfaces or edges; Taping by stitching, stapling or riveting
    • 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
    • B31F1/0038—Rim-rolling
    • B31F1/0041—Rim-rolling combined with joining
    • 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
    • B31B2100/00—Rigid or semi-rigid containers made by folding single-piece sheets, blanks or webs
    • 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
    • B31B50/26—Folding sheets, blanks or webs
    • B31B50/585—Folding sheets, blanks or webs by air jets

Definitions

  • the invention relates to folding boxes made of cardboard material, as they are very often used for packaging goods.
  • Such folding boxes are usually produced from flat, punched-out blanks by initially bending up certain surfaces from the blank plane, for example the side surfaces of the later carton, and fixing them to one another.
  • the fixing usually takes place in that so-called adhesive flaps are placed on the inside or outside of the adjoining wall of the box, for example, and are glued to it. Since the cartons are usually erected and fixed by gluing on a packaging line immediately before the products are inserted into the unfolded carton, the glue used and the machine equipment required for this, such as glue nozzles, glue rollers, etc .is a constant source of pollution and potential for disruption.
  • the adhesive is a foreign material compared to the cardboard material of the box, which makes the later disposal of the box and in particular its recycling more difficult.
  • empty beverage containers such as plastic bottles
  • the two adjacent wall layers are also cut and pushed through the other wall layer from one side so that the cut edges face each other to get caught and to prevent an elastic deformation of the bottles.
  • this object is achieved in that a section of the first of the two plates - which are parallel to one another, in particular abutting one another - the so-called tab plate, is pressed transversely to the plane of the plate in a push-through direction into the second plate or even through it is pushed through and protrudes in particular on the back of this second plate.
  • This shifted section of the first panel is, in particular afterwards, positively connected to the sections of the second panel that are in contact with it, preferably on its rear side, which is achieved in particular by pressing on the section, for example on the rear side of the second panel, such as a tab, can take place opposite to the push-in direction or push-through direction on the back of this second plate.
  • the form fit can be achieved by a large number of very small, even microscopically small, i.e. no longer visible to the naked eye, form fit elements, such as fibers of the cardboard material, which also form randomly when the section of the first board is pressed together with a section the 2nd plate.
  • more than two plates can also be connected to one another, in that at least one further intermediate plate can be located between the first and second plate described, on which in particular corresponding sections to be bent over are then also formed.
  • This form-fitting connection not only of the cutting or tearing edges of the section of the first panel produced around its through-opening, but of essentially the entire section, results in a very strong connection between the two panels, for example two boxes, also depending on the degree of compression -layers, generated.
  • this form-fitting connection is tamper-proof, because after being loosened once, the panels can be placed on top of each other again, but the original pressing state of the sections of the panels cannot be achieved again in the same form.
  • the load-bearing capacity naturally also depends on the size and shape of the bent sections produced and/or, in the case of pressing, on the level of the pressing force.
  • the plate plane is the main plane of a plate, whereby a plate usually has a constant thickness and the plate plane is thus defined as the center plane between the two main surfaces on both sides - i.e. the surfaces with the greatest extent of the plate.
  • the pressing is carried out up to a plastic, i.e. no longer re-deforming, deformation of the folded-over section of the first panel, in particular by pressing this section flat on the rear side of the second panel, and clamping the edge area of the opening in the second panel created when pressing through , the edge areas of which are usually also folded backwards or outwards at the back.
  • the section created by piercing the first plate is thus quasi beaded around the edge regions of this second plate, in particular by more than 90°, in particular by up to 180°. But even if the sections are only folded by 90°, the many very small form-fitting connections mentioned above, some of which are individually less than 1 mm in size, take place during the subsequent pressing process.
  • the pressing in of the section of the first plate is preferably continued until it is pressed through the second plate, ie until the second plate tears open.
  • an alternative solution can also consist in the second panel being a previously perforated panel and the sections of the first panel formed by tearing open the first panel, in particular tabs, being placed around the inner circumference of the holes in the previously perforated second panel .
  • an incision is made at the same time, in particular cutting through at least the first panel, preferably also the second panel behind it, so that defined cuts and defined sections between the cuts or tabs are created.
  • the flanging is carried out in a radial direction away from the pressing direction and/or in a circumferential direction around the pressing direction.
  • the pressing is preferably carried out from the rear of the second panel and preferably while supporting the front of the first panel.
  • the support the front side of the first panel is preferably carried out by means of a push-through base from which the individual physical push-through elements protrude, for example a plate-shaped base which, after being pressed in or pushed through, rests on the front side of the first panel anyway and serves as a support for pressing the serves from the back.
  • the pressing is carried out from the back of the second panel while the pressing element is at least partially still in its pressing position, i.e. still in the thickness range of the first panel or even in its maximally advanced position in the pressing direction Position.
  • the pressing element is at least partially still in its pressing position, i.e. still in the thickness range of the first panel or even in its maximally advanced position in the pressing direction Position.
  • the retraction of the pressing-in element does not necessarily have to take place only in a linear pressing-in direction, which can in particular be directed perpendicularly to the plate plane, but the pressing can have an additional movement component, for example radial to the pressing-in direction, i.e. approximately in the plate level, or rotating around the indentation direction.
  • the direction of a cutting edge or guide surface present on the pressing-in element for the section to be folded over can also depend on the movement of the pressing-in element during pressing are arranged, ie with an additional rotating movement, this can extend in the circumferential direction around the pressing-in direction, at the same time if necessary. Also extend radially away from the foremost area, such as a tip, of a physical pressing-in element.
  • a linear pressing-in movement which contains on the one hand a component perpendicular to the plane of the plate and on the other hand a component in the plane of the plate, can be used to perform a targeted beading of the detached section in a folding direction using a corresponding pressing-in element.
  • the procedure described so far is based on an order of magnitude of the section of the first plate to be produced, which is at least as large, rather larger than the thickness or at least half or at least a quarter of the thickness of the first plate, other procedures are conceivable if the material of the panels, at least that of the first panel, contains a multiplicity of fibres, in particular consists predominantly of fibres, as is the case with paper materials and cardboard material.
  • the produced sections of the first plate which are pressed into the second or even pushed through it, can turn out to be much smaller in relation to the plate thickness, for example with a size dimension of the section - measured along the plane of the plate - of the maximum 1/ 5, better a maximum of 1/10, better a maximum of 1/20 of the thickness of the panel.
  • the fiber is displaced into the adjacent second plate, but most often only part of its length, or even pushed through that second plate, although in this case this is not the primary goal.
  • the fibers and thus also the sections that are pressed through are very thin, usually in the range of a few 1/10 millimeters, it is not necessary to press on the folded sections that may protrude from the back of the second panel, in this case fibers. especially since the aim is to let the fibers end in the second plate.
  • the press-in element should have a size, in particular a diameter, which is in the order of magnitude of the fibers to be pushed through, ie for example a maximum of 5 times, better a maximum of 3 times, better a maximum of 2 times, better maximum 1-fold Diameter corresponds to the largest or average diameter of the fibers.
  • the folding over of the sections of the first panel produced by pressing through, in particular on the rear side of the second panel can be supported or even exclusively effected by means of a fluid flow, for example an air flow such as compressed air:
  • a fluid flow for example an air flow such as compressed air:
  • the section of the first plate can be pressed into or through the second plate by means of a mechanical pressing-in element, while the flanging on the rear side of the second plate can be achieved by means of an air flow instead of by means of a guide surface or in addition to a guide surface, for example by Compressed air is supplied through the hollow interior of the corporeal crimping member and emanates at the appropriate location on the outer surface of the corporeal crimping member and presses against the portion to be crimped.
  • Compressed air is supplied through the hollow interior of the corporeal crimping member and emanates at the appropriate location on the outer surface of the corporeal crimping member and presses against the portion to be crimped.
  • This also has the advantage that a collision between the pressing-in element that is still in the pressing-in position and the counter-holder that is approaching can then be avoided.
  • both the tearing open or cutting of the first plate and the pressing in of the section generated thereby, such as a tab, of the first plate in or through the total and without a mechanical pressing-in element second plate are effected, for which under certain circumstances more than one nozzle is required for a section to be folded over, which require a different nozzle design and/or a different operating pressure.
  • connection device for positively connecting two parallel, plastically deformable plates by means of positive locking and in particular only by means of a form fit, and in particular also in the middle of the panel surface, i.e. away from the panel edge and its use
  • the existing object is achieved in that there is a press-in element which is able to press a section of the first panel to press into or through the second plate, which is possible in particular by means of a physical pressing-in element which is movable in a controlled manner transversely to the plane of the plate in a pressing-in direction.
  • the pressing-in element can also press sections of the first panel through the holes in a pre-punched second panel.
  • connection can be improved by having a counter-holder that can be moved transversely to the plane of the panel and is arranged opposite the press-in element in such a way that the two panels to be connected can be accommodated between them.
  • a first configuration of the depressing element is that it is a physical depressing element, such as a pin or a slider.
  • such a physical pressing-in element has a cutting edge for cutting through the first panel and/or a guide surface for guiding the section to be folded over produced by the incision, such as a tab, of the first panel, for example up to the back of the second plate.
  • a counter-holder that may be present can also have a guide surface for guiding, in particular folding and beading, the section of the first panel, for example onto the rear side of the second panel.
  • a counter-holder in particular a sleeve-shaped one, preferably has an annular contact surface at its free end with a blind hole opening or through-opening in it, in or through which the press-in element can be pushed in with little play, in particular no greater play than an H7/f7 fit, fits through, in particular with one counter-holder per through-opening.
  • the diameter of the press-in element is no more than 3.5 mm, better no more than 3 mm, better no more than 2.6 mm, and the outside diameter of the annular pressing surface corresponds to 1.8 times to 2.4 times of the diameter of the indenting element and/or is no more than 3.5 mm, preferably no more than 3 mm larger than the diameter of the indenting element.
  • the counter-holder can be continuous and plate-shaped over a plurality of through-openings or can be arranged in the form of a pin, in particular in the form of a sleeve, over a respective through-opening.
  • the free distance between two adjacent press-in elements is preferably at least 3.8 mm, better at least 3.5 mm, better at least 5 mm, better at least 6 mm.
  • the directions of the cutting edge and/or guide surfaces of the press-in element are matched to the shape and/or direction of the guide surface of the counter-holder in order to ensure good guidance of the section of the first panel to be folded over.
  • a typical design of the press-in element is in the form of a rod or pin.
  • a typical design of the counterage is a rod shape with a blind hole or a through-opening that opens into the contact surface at the free end, so that the rod can preferably be a sleeve.
  • the press-in element can have outlet openings for a fluid, for example compressed air, in its outer surface, in particular its peripheral surface, in order to radially press away the section of the first plate that is located there and may be in contact with the press-in element and thereby fold it over or bead it, at least until the counter-holder presses the folded-over section firmly against the second plate and connects it to it in a form-fitting manner, in particular by pressing it.
  • a fluid for example compressed air
  • the press-in element can be an element that generates a fluid flow, for example a nozzle, with the fluid preferably being Air, i.e. compressed air, is used.
  • the nozzle is then always positioned on or in front of the front side of the first panel, and by means of the compressed air, in particular a compressed air blast, the first panel is pierced on the one hand, and thereby at least one section adjacent to this cut is produced, which is then - by means of the same Nozzle or a second nozzle arranged next to it - can be turned in the desired direction, i.e. can be shifted into the second plate or can be pushed through it.
  • Air i.e. compressed air
  • FIGS. 1a - f show a sectional view of the form-fitting connection of two adjacent panels 1, 2 made of cardboard material, for example a side wall and an adjacent fastening projection of an adjacent side wall in a folding box folded from a blank, which must be fixed to one another in order to secure the folding box in the to keep upright shape.
  • the two plates 1, 2 lie parallel to one another, preferably in contact, and are to be connected to one another in a form-fitting manner and without foreign material in a predetermined area at a large number of adjacent points - as shown in the bottom part in the top view in a square grid.
  • the individual indentation elements 3, here indentation nails 3, have in the two right representations of the Figure 1a at the free end a tip 3a from which three cutting edges 7 distributed over the circumference extend to the complete - round or triangular-star-shaped - cross section of the press-in nail 3, which adjoins the conical tip with the three cutting edges 7 forming a cone, as best in Figure 2a, 3a evident.
  • the cutting edges are in Figures 1a - f shown running straight in the axial direction, in contrast to the cutting edges 7 running slightly spirally from the tip, as alternatively in Figure 3a shown.
  • the tip area of the indentation nail 3 can also be a triangular, quadrangular or polygonal cone whose side surfaces extend up to the correspondingly polygonal or round, complete cross section of the indentation nail 3 .
  • Figure 1a on the left is a round push-in nail 3 with a quadrangular conical tip.
  • the penetration direction 6 is identical to the greatest direction in which the pressing-in elements 3 extend, both are collectively referred to as the axial direction. If, on the other hand, the two directions diverge, a distinction is made between the direction of penetration and, if applicable, the axial direction of the pressing-in elements 3.
  • the second plate, the receiving plate 2 is also torn open, either first by cutting through the cutting edges 7 of the tip of the press-in element 3 or already by pressing the tabs 1A of the tab plate 1 from below against the second plate 2 to form a through hole 14.
  • Figure 1d shows the state when both panels 1, 2 have been completely penetrated by the pointed initial area of the press-in element 3 and both panels 1, 2 from the respective panel plane 11, 12, in this case upwardly bent sections, namely the tabs 1A, 2A, which can be bent out of the plate plane 11 or 12 by more than 90°.
  • the tabs 2A are usually looped around by the tabs 1A.
  • press-in element 3 does not have to be slim, pin-shaped or pointed at the free end, but then the tearing of the plates 1, 2 and the bent sections 1A, 2A that form around the through-opening 13, 14 are less defined .
  • tabs 1A, 2A - the tabs 2A should ideally lie between the tabs 1A and the adjacent edge regions of the plate 1 - are fixed positively against one another, which should be done by mutual pressing.
  • a counter-holder 6 is also placed in the area of the bent tabs 1A, 2A, ie correspondingly close to the through-openings 13, 14, for example running around them.
  • the counter-holder 6 is equipped with a passage opening that is only slightly larger than the shank diameter of the press-in element 3 and is located at the position of the press-in element 3, so that it is on the plate composite 1+2 in the axial direction of the pressing-in elements 3 can be moved and the two tabs 1A, 2A can be pressed against each other as in Figure 1e shown.
  • the pressing-in element 3 remaining in the maximum pressed-in position increasingly extends through the through-openings 13, 14 into the counter-holder 6.
  • the counter-holder 6 can be formed in two parts from a part 6* for supporting the area away from the puncture points and the part 6 for supporting the area around the puncture points.
  • the two parts 6*, 6 can be moved in a controlled manner relative to one another, in particular in the axial direction of the pressing-in elements 3, because the entire process runs automatically with a large number of pressing-in elements 3 at the same time and mostly in a matrix form via a defined connection Area of the plate compound distributed 1+2.
  • the counter-holder 6 - even in the case of a two-part design - has in the counter-holder part 6 around the through-opening a collar 9 with a pointed cross-section and directed in the direction of the press-in base 4, which slides closely along the outer circumference of the press-in element 3 and its outer Circumferential contour on the side facing away from the through openings 13, 14 can have a concave curvature as a guide surface 9 - as in Figure 1c , 1d and in Figure 1e only shown for the two right counterholds 6.
  • the tabs 1A, 2A of the peripheral contour of the press-in element 3 are quasi peeled off and flanged away from the press-in element 3, ie bent by more than 90° from the plate plane 11, 12, preferably folded by up to 180°.
  • annular depression 9* is additionally formed on the press-in base 4 around the press-in element 3 with a cross section of the negative form of the cross section of the collar 9, so that in the radial direction around the passage openings 13, 14 the axial distance between the collar 9 and the recess 9* remains the same.
  • the tabs 1A, 2A can be pressed against each other in a particularly good form-fitting manner and the overhang transverse to the plate planes 11, 12 of the folded and pressed tabs 1A, 2A are kept as small as possible, as in Figure 1e shown.
  • Figure 1f right shows an alternative design of a counter-holder 6, which has no through-opening and consequently can only be moved in the direction of press-in base 4 when - preferably simultaneously - the press-in elements 3 backwards, ie downwards here, again out of the plate Retire compound 1+2.
  • an intermediate plate 4* with a perforation is preferably placed on the plate-shaped press-in base 4 to which the press-in elements 3 are attached, through which the press-in elements 3 extend and which when the press-in base 4 is retracted in Plant can remain on the tab plate 1 as an abutment for the approaching counter-holder 6, which applies the necessary pressing force.
  • the entire press-in base 4 including the intermediate plate 4* can be controlled slightly in the direction of the plate plane 11, 12 relative to the plate stack 1+2 be moved, which takes place before the placement and pressing by the counter-holder 6, so that the support can be provided by the intermediate plate 4* at the through-openings 13, 14 of the plates 1, 2 by a continuous section of the intermediate plate.
  • the deflected tabs 1A, 2A are also pressed against one another, but at the same time are also moved further radially towards the center of the through openings 13, 14 created in the plates 1, 2, which thereby become smaller, which may be for optical reasons can be desired.
  • the counter-holder 6 can have a projecting collar 9, possibly with a pointed cross section, at the location of the through-opening 13, 14 - then preferably with a smaller diameter than the original through-opening 13, 14 - with an adjoining guide surface 9, or a tip directed to the center of the through hole 13,14.
  • the contact direction 15 is preferably directed in the opposite direction to the pressing-in direction 16, but can also differ from this by a small angle of up to 30°.
  • Figure 1f On the left, however, shows pin-shaped counter-holders 6, the axial direction of which runs perpendicularly to the plate planes 11, 12, and one of which is arranged over each of the through-openings 21, 22 formed in the plates 1, 2.
  • the end faces pointing in the direction of the through-openings 21, 22 have a larger diameter than the through-openings 13, 14 in the plate assembly 1+2, and in addition each have a protruding tip on the end face.
  • the tip extends to the outer circumference of the rest of the pin-shaped counter-holder 6 in the left-most illustration, in the other Pin-shaped counter-holder 6 has the end face flat and only in its center rises a tip that is significantly smaller in diameter, but whose base area is preferably larger than the size of the through-opening in 13, 14 in order to fold over the tabs 1A, 2A.
  • pin-shaped counter-holders 6 can also all be fastened together to a counter-holder base (not shown) and pressed together for pressing by means of such a counter-holder base against the composite panel 1+2.
  • Figure 3a shows a slightly differently designed push-in element 3, in which - in contrast to the design of Figure 2a - the cutting edges 7 and guide surfaces 8 do not run purely radially and axially from the tip 3a, but are additionally curved in the circumferential direction U, i.e. the cutting edges 7 run spirally and extend around the circumference by about 40° to 120°, and between them the guide surfaces 8, which are also correspondingly curved, run.
  • tabs 1A, 1B are not only bent radially outwards as shown in FIG Figure 2b , but also rotated in the circumferential direction, which results in a particularly stable form-fitting connection after the subsequent pressing, for example because then in this supervision according to Figure 3b considered, the tabs 1A, 2A located one behind the other in the same viewing direction no longer completely cover, but are slightly offset from one another in the circumferential direction, which during pressing results in a more intimate, form-fitting connection by also shifting the radial edges of the tabs 1A, 2A in the respective other tab 2, 1 results.
  • figure 4 shows - in the same viewing direction, but enlarged compared to the Figure 1d - A modified design of a pressing element 3 with active folding elements.
  • This also has in the circumferential direction between the blades, but in the axial direction after the end of the conical initial portion of the pressing element 3 - in one case - in the right half of the figure figure 4 shown - a folding lever 18 that can be folded out of the lateral surface of the pressing-in element 3 and which essentially runs in the pressing-in direction 16 in the swiveled-in starting position is completely in the pressing-in element 3 and does not project beyond its lateral surface.
  • the reversing lever 18 can, however, be pivoted out of the lateral surface with its front end in the pressing direction 16 about a tangential pivot axis 18' arranged in its rear end region in the pressing direction 13 by means of an actuating element (not shown) after piercing the plates 1, 2 and against the respective tab 1A and fold them specifically radially outwards.
  • the representation of the press-in element 3 shows an outlet opening 17 for compressed air at approximately the same longitudinal position, which is also directed against the tab 1a located in the same peripheral area and can be pressurized with compressed air in a controlled manner via supply channels (not shown) inside the press-in element.
  • This compressed air which can also only be applied briefly and intermittently when the counter-holder 6 is placed, should also be used to crimp the tab 1A and thus also the tab 2A by more than 90° from the plate level 11 or 12, in order to achieve an intimate , to achieve a form-fitting connection by means of the counter-holder 6 pressing on.
  • FIGS. 5 and 6 show solutions with an activatable, controllable folding element, which, however, in contrast to figure 4 is not part of a pressing element 3, but itself acts as a pressing element 3 at the same time.
  • this combination element 19 is a plate-shaped parting blade with a limited thickness of usually at most a few millimeters and a correspondingly long cutting edge 19a, which runs transversely to the plane of the blade 19" at its front end.
  • the combination element 19 is usually cut out of a steel plate and the cutting edge 19a is sharpened.
  • the combination element 19 is moved into the plate stack 1+2, in the representation of the figures from below, the stack being generally supported by a counter-holder 6 on the opposite upper side.
  • the combined elements 19 can move in different ways according to the two sets of figures: In the Figures 5a to 5c the combination element 19 is moved linearly in a pressing-in direction 16 which lies in the blade plane 19" and is directed obliquely to the plate planes 11, 12 of the plates 1, 2 to be connected, for example in the direction of the outer of the two cutting flanks , which meet in the cutting edge 19a.
  • the combination element 19 runs through a corresponding recess in a press-in base 4*, on which the stack of plates 1 + 2 rests, and pierces both plates 1, 2 one after the other in an oblique direction to the vertical 10.
  • the combination element 19 - which is otherwise of the same design - does not perform a linear movement, but a pivoting movement about a pivot axis 19 ⁇ running transversely, preferably perpendicularly, to the blade plane 19", about which the combination element 19 can pivot in the press-in base 4 is stored.
  • the combination element 19 In the starting position according to Figure 6a is the combination element 19 completely outside, here below, the thickness range of the plate stack 1 + 2.
  • the combination element 19 By controlled increasing panning - in this direction clockwise - the combination element 19 first pierces both plates 1, 2 one after the other according to Figure 6b and with further pivoting, due to the concave cutting flank at the front in the pivoting direction, it wraps around the resulting tabs 1A, 2A as a guide surface, not only up to 90° transversely to the plate plane 11, 12, but further in the direction of the upper side of the plate 2, such as Figure 6c shows.
  • Figure 6d shows the advantage of this embodiment, in which the combination element 19 can then be pivoted even further and the tabs 1A, 2A can also be pressed against one another as a result, essentially in the direction of the perpendicular 10 to the panel planes 11, 12.
  • a separate, controllable counter-holder 6 serving as a pressing tool can be dispensed with, and if a counter-holder is used at all, it can consist of a simple plate, optionally with openings, which can rest on the stack of plates from the start, but does not apply any pressing force must.
  • FIGS 7a to 8c show the production of the form-fitting connection by means of a non-physical press-in element 3, which in this case consists only of one or more purposefully applied air flows, which are discharged against the plate stack 1+2 by one or more nozzles 20: In this case, too, the stack of plates 1+2 should be cut through in the shape of a three-pointed star.
  • three slit-shaped nozzles 20a - c or a single star-shaped nozzle 20a which is approached or even applied to the outside of the tab plate 1 at a close distance and can be easily installed on a plate by a compressed air blast with, for example, 8 bar pressure from a conventional compressed air network -Stack 1+2 can shoot through, the plates 1, 2 of which are made of a cardboard material with, for example, 1-2 mm thickness.
  • nozzles 20A, B, C which usually have a round or oval nozzle outlet and are arranged in the gussets between the star-shaped slotted nozzles 20a - c, emit compressed air at an angle axially and radially outwards with the Usually then applied at a slightly lower pressure of, for example, 2 bar.
  • the tabs 1A formed by the shooting through are in turn bent upwards out of the plate plane 11 in this illustration and preferably bent by more than 90°—as shown in FIG Figure 7c shows - which take the resting tabs 2A of the resting receiving plate 2 with them and flang them, provided that a corresponding counter-holder 6 is present, as in Figure 7c implied.
  • the counter-holder 6 can best be designed with its side facing the plate stack, in this case the lower side, so that it does not lie flat on the upper side of the receiving plate 2, but only with a large number of raised, mostly round in the top view, counterholder dots 6a, so that the free spaces in between are connected to one another in terms of flow and the suction point, through which the dust is sucked out of this free space by the counterholder 6, does not have to be exactly at the point where the bullet is penetrated.
  • figure 9 shows a solution that is primarily suitable for fibrous boards 1, 2, in which the fibers 5 contained are comparatively long, i.e. at least twice, better three times, better five times the thickness of a board 1, 2 as a length this is the case, for example, with cardboard material reinforced with textile fibers.
  • the fibers 5 contained in the panels 1 can then be used to produce the form-fitting connection, in that fibers 5 of the first panel 1 are pressed with part of their length into the adjacent second panel 2 by means of press-in elements 3 and there with fibers located there 5 or other components of the plate hook in a form-fitting manner.
  • the fibers 5 in the plates 1, 2 are usually present in very large numbers and are also positively connected to one another within the plates.
  • connection device Figures 10a - c differs from that of figures 1 on the one hand by the fact that the pressing-in element 3 is a pin with a particularly round cross-section as shown and a tip with a tip angle alpha of about 40-45°, and the tip also has a round cross-section at every position of its longitudinal extension . Furthermore, this tip preferably has no cutting edge.
  • a sleeve-shaped counter-holder 6 is arranged opposite each press-in element 3 with respect to the plate stack 1+2, but coaxially to the longitudinal direction 3' of the press-in element 3, which is movable in and against the press-in direction 16. guided on the outer circumference in a counter-holder guide 22 and driven by a counter-holder drive, not shown.
  • the sleeve-shaped counter-holder 6 actually has a through-opening, as is usual with a sleeve, or whether it is a blind hole opening only on the front face toward the press-in element 3, but this is also the case the diameter of this opening, in particular through-opening, in the counter-holder has as narrow a tolerance as possible compared to the outer diameter of the press-in element 3 in its area with a constant cross-section, in particular its cylindrical area.
  • the pin-shaped press-in element 3 can also have a polygonal cross-section in the area of its constant cross-section and in particular also in the area of the tip, and analogously the opening, in particular through-opening, in the counter-holder 6 can have an analogous cross-section.
  • the front end face 6a can be a flat annular surface, or on its inner circumference a projecting collar 9, in particular with a pointed cross section, as shown in FIG figures 1 explains why one shape is shown on the left and the other shape of the end face 6a on the right side of the longitudinal direction 3'.
  • the push-in element 3 is advanced so far that the tip of the push-in element 3 has already completely passed over the area of the bent tabs 1A, 2A, in particular the beginning of the area of the push-in element 3 with a constant cross-section of the plate stack 1+2 ⁇ m has left behind a distance that corresponds at least to the radius, in particular the largest radius, of the opening in the counter-holder guide 22 .
  • connection device Figures 11a -c differs from that of Figures 10a - c in that the sleeve-shaped counter-holder 6 is formed in two parts with an inner sleeve-shaped counter-holder 6, which is surrounded by the outer sleeve-shaped counter-holder 6* lying circumferentially on it on the outside.
  • the two counter-holders 6, 6* can be displaced axially independently of one another and relative to one another.
  • the outer sleeve-shaped counter-holder 6* protrudes axially, ie in the longitudinal direction 3', in the direction of the stack of plates from the counter-holder guide 22, prestressed by a spring 21 in the direction of maximum protrusion.
  • the force applied to the plate stack is lower and the outer counter-holder 6* will in particular only slightly compress the spring 21.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Connection Of Plates (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Making Paper Articles (AREA)
EP23157159.7A 2022-02-17 2023-02-17 Procédé d'assemblage par complémentarité de forme de deux plaques se trouvant en parallèle ainsi que dispositif approprié Pending EP4230395A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102022103811.4A DE102022103811A1 (de) 2022-02-17 2022-02-17 Verfahren zum formschlüssigen Verbinden zweier parallel liegender Platten sowie hierfür geeignete Vorrichtung

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EP4230395A2 true EP4230395A2 (fr) 2023-08-23
EP4230395A3 EP4230395A3 (fr) 2024-01-03

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Application Number Title Priority Date Filing Date
EP23157159.7A Pending EP4230395A3 (fr) 2022-02-17 2023-02-17 Procédé d'assemblage par complémentarité de forme de deux plaques se trouvant en parallèle ainsi que dispositif approprié

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DE (1) DE102022103811A1 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3071046A (en) * 1960-04-05 1963-01-01 William H Conant Eyelet reinforcement device
DE1273483B (de) * 1966-07-12 1968-07-25 Hans Biel Fa Verfahren und Vorrichtung zum Heften mehrerer uebereinandergelegter Schreib- und Durchschreibpapierbahnen
SE413480B (sv) 1976-11-18 1980-06-02 Tetra Pak Int Sett och anordning for att anordna en tet oppningsanordning med goda hellegenskaper vid en forpackningsbehallare for flytande fyllgods
US5133124A (en) 1990-10-12 1992-07-28 Burroughs William G Method for compacting recyclable plastic containers
US6135347A (en) 1997-09-24 2000-10-24 Mueller; Charles J. Transportable container with press closure

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DE102022103811A1 (de) 2023-08-17
EP4230395A3 (fr) 2024-01-03

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