EP4408655A1 - Roue dentée de poinçon, roue dentée de scellement, paire de roues d'estampage et dispositif de façonnage d'un matériau en bande pour obtenir un produit de rembourrage - Google Patents

Roue dentée de poinçon, roue dentée de scellement, paire de roues d'estampage et dispositif de façonnage d'un matériau en bande pour obtenir un produit de rembourrage

Info

Publication number
EP4408655A1
EP4408655A1 EP22801346.2A EP22801346A EP4408655A1 EP 4408655 A1 EP4408655 A1 EP 4408655A1 EP 22801346 A EP22801346 A EP 22801346A EP 4408655 A1 EP4408655 A1 EP 4408655A1
Authority
EP
European Patent Office
Prior art keywords
embossing
gear
padding
web
segment
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
EP22801346.2A
Other languages
German (de)
English (en)
Inventor
Bastian Schalk
Erik ALBERT
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.)
Sprick Bielefelder Papier und Wellpappenwerke and Co GmbH
Original Assignee
Sprick Bielefelder Papier und Wellpappenwerke and Co 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
Priority claimed from DE102021125078.1A external-priority patent/DE102021125078A1/de
Priority claimed from DE102021125089.7A external-priority patent/DE102021125089A1/de
Application filed by Sprick Bielefelder Papier und Wellpappenwerke and Co GmbH filed Critical Sprick Bielefelder Papier und Wellpappenwerke and Co GmbH
Publication of EP4408655A1 publication Critical patent/EP4408655A1/fr
Pending legal-status Critical Current

Links

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
    • B31D—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER, NOT PROVIDED FOR IN SUBCLASSES B31B OR B31C
    • B31D5/00—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles
    • B31D5/0039—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads
    • B31D5/0043—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads including crumpling flat material
    • 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
    • B31D5/00—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles
    • B31D5/0039—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads
    • B31D5/0043—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads including crumpling flat material
    • B31D5/0047—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads including crumpling flat material involving toothed wheels
    • 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
    • B31D5/00—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles
    • B31D5/0039—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads
    • B31D5/0073—Multiple-step processes for making three-dimensional articles ; Making three-dimensional articles for making dunnage or cushion pads including pillow forming
    • 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
    • B31D2205/00—Multiple-step processes for making three-dimensional articles
    • B31D2205/0005—Multiple-step processes for making three-dimensional articles for making dunnage or cushion pads
    • B31D2205/0011—Multiple-step processes for making three-dimensional articles for making dunnage or cushion pads including particular additional operations
    • B31D2205/0017—Providing stock material in a particular form
    • B31D2205/0023—Providing stock material in a particular form as web from a roll
    • 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
    • B31D2205/00—Multiple-step processes for making three-dimensional articles
    • B31D2205/0005—Multiple-step processes for making three-dimensional articles for making dunnage or cushion pads
    • B31D2205/0011—Multiple-step processes for making three-dimensional articles for making dunnage or cushion pads including particular additional operations
    • B31D2205/0064—Stabilizing the shape of the final product, e.g. by mechanical interlocking

Definitions

  • the invention relates to a stamping gear and a sealing gear for a stamping gear pair of a device for forming a web material, in particular a paper web, into an upholstery product.
  • the invention also relates to a pair of embossing gears for an apparatus for forming a sheet material into a cushioning product.
  • the invention also relates to a device for forming a web material into an upholstery product.
  • the web material can be present in the form of a starting material web roll, in particular in the form of a preferably coreless roll, or a leporello stack.
  • WO 2000 020 196 A2 describes a cushioning conversion machine with an embroidery assembly. Included therein are embroidery means which contain a plurality of radially outwardly directed projections which mesh with one another. One of the embroidery means includes a socket and the other embroidery means includes cutting edges which penetrate the recesses to make rows of slits in a sheet material to thereby hook overlapping portions of the sheet material together. The embroidery means are pressed against each other.
  • the cushioning conversion assembly includes a pair of gears having a plurality of teeth rotatable about a respective axis.
  • the teeth of one gear mesh with the teeth of the other gear.
  • Both gears have wedge-shaped outer segments and a center segment with shorter, narrower teeth that are rotationally offset relative to the teeth of the outer segments and are circumferentially truncated with a sharp edge.
  • the center segments create a row parallel slits in a sheet material guided by the pair of gears such that frictional forces along the slit edges hold the layers of sheet material together.
  • the sheet material In the known cushioning conversion devices, the sheet material often tears at the embroidery means or gears, which can lead to reduced cushioning quality or to a paper jam. Another problem is that plies of the sheet material can be insufficiently bonded together, which also affects the quality of the cushioning material. The cushioning conversion machines also generate a lot of noise, which is perceived as annoying.
  • the paper web can be single-ply or multi-ply.
  • the material of the paper web can be, for example, kraft paper or recycled paper, in particular made from recycled waste paper, cardboard or cardboard. The use of recycled paper is preferable due to its special environmental friendliness.
  • the paper web can be provided as a supply, for example as a wound roll, in particular as a sleeveless roll, or a leporello stack.
  • the length of the paper web is preferably substantially, i.e. at least 10, 50 or 100 times greater than the width of the paper web.
  • the thickness of the paper web corresponds to the thickness of the single or multi-ply paper material and is preferably less than one millimeter.
  • the material of the paper web is made in particular from recycled paper.
  • Recycled paper is, in particular, paper material with a small proportion (less than 50%) of paper material containing fresh fibers.
  • paper materials containing 70% to 100% waste paper are preferred.
  • the recycled paper can preferably be paper material which can have a tensile strength index along the web direction of at most 90 Nm/g, preferably a tensile strength of 15 Nm/g to 60 Nm/g and a tensile strength index transverse to the web direction of at most 60 Nm/g, preferably a tensile strength of 5 Nm/g to 40 Nm/g.
  • a standard DIN EN ISO 1924-2 or DIN EN ISO 1924-3 can be used to determine the tensile strength or the tensile strength index. Additionally or alternatively, a recycled paper property or waste paper property can be characterized by the so-called bursting resistance.
  • a material in this sense is recycled paper with a bursting index of at most 3.0 kPa*m ⁇ 2/g, preferably with a bursting index of 0.8 kPa*m ⁇ 2/g to 2.5kPa*m ⁇ 2/g.
  • the DIN EN ISO 2758 standard is used to determine the bursting index.
  • the material of the paper web has a mass per unit area of in particular 40 g/m ⁇ 2 to a maximum of 140 g/m ⁇ 2.
  • the starting material of the paper web can be present in the form of a roll of web material or a zigzag-folded stack of packaging material, which is also referred to as a leporello stack.
  • DE 690 30 410 T2 describes a filling material product for use as packaging or wrapping material, which is formed with lateral, cushion-like sections and a central connecting section that runs along the length of the product.
  • the product is formed from a three-ply web of stock material, typically provided in a 76.2 cm [30 inch] wide roll.
  • the edges of a stock material are rolled inwardly to form pillow-like sections connected along their touching, abutting sides by embossed sections.
  • perforations are provided in the connecting section, which are intended to prevent the connecting section from being dissolved or separated.
  • the cushioning product is 20 to 23 cm [8 to 9 inches] wide with the central portion being at least 3.8 cm [11 ⁇ 2 inches] wide and about 1.3 to 1.9 cm [1 ⁇ 2 to 3 ⁇ 4 inches] high.
  • the pillow-like sections are approximately 5.1 to 6.4 cm [2 to 21 ⁇ 2 inches] wide.
  • a cushioning material product is also described in GB 2501260 A. According to this, a web of paper material with side edges which are rolled up several times is drawn in under tension by pressing gears in order to be partially pressed by them. In the cushioning material product thus manufactured, the rolled up side edges of the web of paper material are included in the indented area. In this way, a stable cushioning material product is to be manufactured which is to have sufficient volume with the least possible longitudinal shrinkage in comparison to the starting web of paper material.
  • DE 10 2012 018 941 A1 discloses a packaging product which is formed from a paper web material in that longitudinal edge strips have been folded over and a sequence of embossed valleys and embossed peaks are introduced in a central area of the web.
  • the folded longitudinal edge strips form hollow cushions on both sides of the central area, which extend in the longitudinal direction.
  • To the Short sides of the packaging product are provided with slit perforations, which form slit edges which mutually interlock under different layers of paper web sections.
  • the central area is left free of perforations to avoid damaging the web plies and thereby weakening the packaging product.
  • Such a packaging product is about 30 cm long and 16 cm wide.
  • the packaging product formed in this way is particularly dimensionally stable, particularly in the area of the lateral crumple cavities, which primarily provide the elastic restoring forces of the packaging product.
  • a stamp gear for a stamping gear pair of a device for forming a web material, in particular a paper web, into an upholstery product.
  • the web material may be in the form of a roll of web stock, in particular in the form of a preferably sleeveless roll or a Leporello stack.
  • the punch gear wheel has a multiplicity of stamping teeth, valleys arranged between adjacent stamping teeth and punching lugs arranged in the area of the valleys. At least one punching nose is preferably arranged in the region of each valley. Alternatively, valleys in the circumferential direction of the embossing gear can be successively alternatingly free of punching noses and equipped with at least one punching nose.
  • the stamp gear wheel has continuous stamping teeth in the axial direction.
  • the axial direction of the stamp gear corresponds to the operational axis of rotation of the stamp gear.
  • Stamp teeth and valleys alternate along the outer circumference of the punch gear.
  • the portions of the die gear that form the die teeth have a larger outer radius than the portions of the die gear that form the valleys.
  • at least one punching nose is arranged in several of the plurality of valleys, preferably in all of them.
  • the punch noses have a punch nose outer radius with respect to the axis of rotation of the punch gear which is smaller than the outer radius of the stamping teeth and which is larger than the outer radius of the valleys.
  • the risk of the web material to be formed tearing in the region of the stamping gear is significantly reduced compared to a conventional pair of stamping gears.
  • the quality of the cushioning product to be formed can be increased and the risk of material jamming can be reduced.
  • the stamp gear in particular edge segments of the stamp gear, have axial outer side surfaces, with transition areas such as at least one phase or at least one radius being provided between the outer side surface and the embossing teeth.
  • the several edge segments of the stamp gear are preferably dimensioned the same.
  • the transition areas can be rounded.
  • transition areas to the outer side surface can optionally be provided.
  • the risk of the web material to be formed tearing can also be reduced with the aid of transition areas between the outer side surfaces of the punch gear wheel and its embossing teeth, and the quality of the upholstery product can thus be increased and the risk of material jamming reduced.
  • stamp gears with transition areas can be operated with comparatively low volume.
  • the stamp gear includes a plurality of disk-shaped axial segments.
  • the axial segments include two edge segments having a plurality of uniform ridges and valleys formed between adjacent ridges. Furthermore, the axial segments comprise at least one punch segment arranged axially between the edge segments with punching lugs arranged in the area of the valleys.
  • the stamp segment preferably has a large number of tooth sections which correspond to the embossing teeth. In the region of the tooth sections, the punch gear wheel is preferably formed congruently with the stamping teeth of the edge segments.
  • the stamp gear can be formed from a plurality of disk-shaped axial segments.
  • Disk-shaped axial segments can be easily manufactured with the same shape, which facilitates assembly and facilitates smooth running during operation, which increases the quality of the upholstery product and reduces noise emissions.
  • the tooth sections of the punch segment preferably have the same cross-sectional shape as the embossing teeth of the edge segments.
  • the stamp gear comprises two stamp segments arranged between the edge segments and at least one central segment arranged between these stamp segments. It can be preferred that two, three or more middle segments are provided between the edge segments. Several, in particular all, middle segments of a stamp gear wheel can be dimensioned the same. It can be preferred that several middle segments of a stamp gear wheel have a single middle segment that has a different axial width than the other middle segments of the same type. In particular, the several stamp segments have the same dimensions.
  • the middle segment is preferably shaped to correspond to the edge segments. Alternatively, it can be provided that the middle segment is shaped differently from the edge segments.
  • a middle segment can be designed as a gear wheel with helical gearing or double helical gearing.
  • the middle segment can be formed as a pair or a group of gears with helical gearing, in particular co-rotating or counter-rotating.
  • the cross-sectional shape of the middle segments and the edge segments is preferably the same, in particular congruent.
  • the invention also relates to a sealing gear for an embossing gear pair of a device for forming a web material, in particular a paper web, for example in the form of a preferably sleeveless roll or a fanfold stack, into an upholstery product.
  • the axial direction of the sealing gear corresponds to the operational axis of rotation of the sealing gear.
  • the sealing gear wheel has a plurality of disk-shaped axial segments, comprising two edge segments with a large number of uniform embossing teeth and valleys formed between adjacent embossing teeth, and at least one sealing segment arranged axially between the edge segments with a rotationally symmetrical shape with respect to the gear wheel axis and/or a maximum sealing segment radial extension, which is not greater than, in particular as large as, the preferably smallest edge segment radial extent in the region of the valleys.
  • the sealing gear in particular the edge segments of the sealing gear, have axial outer side surfaces, in particular rounded transition areas being provided between the outer side surface and the embossing teeth.
  • the sealing gear in particular edge segments of the sealing gear, has axial outer side surfaces, with transition areas such as at least one phase or at least one radius being provided between the outer side surface and the embossing teeth and/or the valleys. In the area of the valleys, transition areas to the outer side surface can optionally be provided.
  • the sealing gear is preferably free of punching noses.
  • the invention also relates to an embossing gear pair for a device for forming a web material, in particular a paper web, for example in the form of a preferably sleeveless roll or a Leporello stack, into an upholstery product.
  • the stamping gear pair comprises a stamping gear with stamping teeth, valleys arranged between adjacent stamping teeth and punching lugs arranged in the region of the valleys, and a sealing gear which can be brought into engagement or is stationary with the stamping gear.
  • the stamp gear is designed as described above.
  • the sealing gear is designed as described above. It can be preferred that the embossing teeth and valleys of the stamping gear and the embossing teeth and valleys of the sealing gear are shape-matched to one another.
  • edge segments of the stamping gear and the edge segments of the sealing gear have the same dimensions. Alternatively, they can Edge segments of the sealing gear and/or the embossing gear have different widths. Edge segments of a sealing gear and a stamping gear can preferably be interchangeable.
  • the sealing gear wheel and the stamp gear wheel there is a radial distance with a distance width in the range of 0.01 mm to 1 mm.
  • the radial clearance has a clearance in the range of 0.05 mm to 0.5 mm. It can be particularly preferred that the spacing is in the range of 0.1 mm to 0.2 mm. It is clear that preferably the radial distance between the gears of the embossing gear pair in the operational position of the gears is free of the embossing gear pair being covered with web material, in particular paper web, and free of padding material being covered.
  • the stamping gear and the sealing gear can preferably be mounted on a frame of the forming device in such a way that the sealing gear meshes with the stamping gear, with the respective outer circumference of the stamping gear and the sealing gear being preferably matched to one another in such a way that there is no radial adjustment of the stamping gear to the sealing gear .
  • the stamping gear and the sealing gear are in particular held on the frame of the forming device and their outer circumferences are matched to one another in such a way that there is essentially pure tangential contact between the sealing gear and the stamping gear.
  • the stamping gear and the sealing gear are preferably mounted and matched to one another in such a way that the tooth flanks of the stamping teeth grip one another, in particular roll on one another, without the tooth tips coming into contact with the tooth base or valley base.
  • the radial distance is preferably always provided between the bottom of the valley of the sealing gear and the tooth tip of the stamping gear engaging therein and/or between the valley bottom of the stamping gear and the tooth tip of the sealing gear engaging therein.
  • a tangential contact between stamping gear and sealing gear can be provided if, for example, only one of the gears, either stamping gear or sealing gear, is driven directly by a motor and drives the other of the gears.
  • the sealing gear has a plurality of disk-shaped axial segments, the axial segments having two edge segments with a large number of uniform embossing teeth and valleys formed between adjacent embossing teeth and at least one sealing segment arranged axially between the edge segments and having a shape that is rotationally symmetrical with respect to the gear wheel axis /or a maximum radial extent of the sealing segment which is not greater than, in particular as large as, the preferably smallest radial extent of the edge segments in the region of the valleys.
  • this has a sealing segment axial extension that is at least as large as an axial width of the punching noses and/or as an axial extension of the stamping segment.
  • the axial extent of the sealing segment is at least 0.1 mm, in particular at least 0.2 mm, greater than the axial width.
  • the axial extent of the sealing segment is no more than 0.5 mm, in particular no more than 0.3 mm, greater than the axial width.
  • the punch gear is particularly preferably matched to the sealing gear in such a way that punching lugs on the circumference of the punch gear engage and/or roll into corresponding openings on the circumference of the sealing gear, particularly in the area of the embossing teeth of the sealing gear.
  • the stamping gear is preferably matched to the sealing gear in such a way that about 0.125 mm play is provided on both sides of the stamping teeth.
  • the sealing gear and the stamping gear are preferably coordinated with one another such that the punching lugs penetrate into axial openings along the sealing gear-die-gear-pair heads, so that as the stamping gear rolls on the sealing gear, punching perforations are introduced into the cushioning product to be formed.
  • a development of the embossing gear pair provides that the segmented sealing gear has at least two between the edge segments arranged sealing segments and at least one arranged between the sealing segments middle segment. It can be preferred that two, three or more middle segments are provided between the edge segments. Several, in particular all, middle segments of a sealing gear can be dimensioned the same. Several, in particular all, middle segments of the sealing gear and the stamp gear can be dimensioned the same. It can be preferred that several center segments of a sealing gear have a single center segment that has a different axial width than the other, similar center segments. In particular, the several sealing segments have the same dimensions.
  • the middle segment is preferably shaped to correspond to the edge segments.
  • the cross-sectional shape of the middle segments and the edge segments is preferably the same, in particular congruent.
  • a preferred embodiment of the pair of embossing gears provides that the stamping gear and the sealing gear have edge segments and/or middle segments of the same dimensions.
  • both the stamping gear and the sealing gear each have a pair of axially outer side surfaces opposite to one another in the axial direction. Transition areas, such as at least one phase or at least one radius, are provided between the outer side surfaces and stamping teeth of the stamping gear and/or the sealing gear. The transition areas are preferably rounded off.
  • the sealing gear is free of punching lugs.
  • stamping lugs are usually provided on both meshing gears of a stamping gear pair.
  • punching lugs are preferably provided on only one gear wheel, the punch gear wheel, of the pair of embossing gear wheels.
  • the sealing gear is implemented as a second embossing gear with punching lugs, the first embossing gear and the second embossing gear being matched to one another in such a way that the punching lugs of the first embossing gear engage in embossing valley-axial areas of the second embossing gear that are free of punching lugs, and the opposite.
  • first and the second embossing gear can be provided with two or more axial regions offset in the axial direction, in which the first and the second embossing gear are each successively alternating in the circumferential direction of the embossing gear and are equipped with at least one punching nose.
  • the first embossing gear and the second embossing gear are matched to one another in such a way that the punching lugs of the first embossing gear engage in punching lugs-free embossing valleys of the second embossing gear, and vice versa.
  • the first and the second embossing gear each have valleys that are successively alternating in the circumferential direction of the embossing gear and have valleys that are free of punching noses and valleys that are equipped with at least one punching nose.
  • the invention relates to a device for forming a web material, in particular a paper web, for example paper web in the form of a preferably coreless roll or a fanfold stack, into an upholstery product with at least one stamping gear, in particular as described above, at least one sealing gear, in particular as described above , And/or at least one stamping gear pair, in particular as described above.
  • a device for forming a web material in particular a paper web, for example paper web in the form of a preferably coreless roll or a fanfold stack
  • at least one stamping gear in particular as described above
  • at least one sealing gear in particular as described above
  • And/or at least one stamping gear pair in particular as described above.
  • one of the gears of the pair of stamping gears is held pretensioned on a frame of the device transversely to the axial direction of the gear with a spring device.
  • the spring device provides a spring constant of at least 5 N/mm, at least 10 N/mm or at least 15 N/mm, in particular at least 30 N/mm.
  • the spring device can be designed to provide a prestressing force of at least 200 N, in particular at least 350 N, preferably at least 600 N. It should be understood that the biasing force is provided in the radial direction with respect to the axis of rotation is.
  • the prestressing force is preferably provided for a pair of stamping gears according to the invention, in which there is a radial distance between the stamping gear and the sealing gear.
  • the frame can include a counter bearing for the axis and/or shaft for supporting the prestressed gear wheel, in particular the stamp gear, with the counter bearing holding the gear wheel, in particular the stamp gear, at the radial distance relative to the other gear wheel, in particular the sealing gear wheel, preferably when the space between the gears of the pair of embossing gears is free of the web material, in particular the paper web, as well as free of the cushioning product.
  • the forming device is thus formed in such a way that the prestressing force does not act directly from one gear wheel onto the other gear wheel of the stamping gear pair.
  • the biasing force is only activated when web material is converted into cushioning material between the gears of the pair of embossing gears, with the web material and/or the cushioning product occupying the radial distance between the gears
  • a forming device includes a preforming device that is designed and set up to insert folded and/or rolled-in padding areas along opposite longitudinal edges of the web material, with the stamping gear wheel and/or the embossing gear pair having a gearwheel axial width for gripping both padding areas.
  • the preformer includes guide means, such as converging guide bars, whose discharge spacing is substantially equal to the gear axial width. Alternatively, the discharge distance can be greater than the gear axial width.
  • the forming device is preferably designed and set up to output an upholstery product with a piece length of no more than 30 cm or no more than 25 cm, in particular no more than 15 cm, preferably no more than 10 cm or no more than 5 cm, particularly preferably no more than 3 cm.
  • the forming device is designed and set up to output an upholstery product with a piece width of at least 4 cm or 5 cm, in particular at least 8 cm, preferably at least 10 cm, and/or no more than 12 cm, in particular no more than 10 cm.
  • the padding width can particularly preferably be in a range from 7 cm to 10 cm, particularly preferably in the range from 8 cm to 9 cm.
  • the sealing gear is formed as a one-piece gear.
  • the edge and middle segments described in more detail at the beginning, as well as a sealing segment, are manufactured in one piece.
  • the at least one sealing segment is formed from a radially circumferential groove which corresponds to the respective stamp segment.
  • the embossing teeth of the sealing gear are interrupted by the groove.
  • the groove is about 0.1 mm to 0.2 mm wider than the width of the corresponding punching lugs of the punch gear, which can thus enter the grooves with play.
  • the outer diameter of the groove is smaller than the tooth base diameter of the sealing gear.
  • the sealing gear wheel is firmly connected to the output shaft of a gear mechanism, which is driven by the electric drive motor.
  • the transmission as well as the transmission output shaft and also its bearing, are designed in such a way that the transmission output shaft together with the bearing, in addition to the drive torque, also absorbs all other forces that occur during operation of the forming device. In this way, a particularly compact design that is easy to assemble is provided for the forming device.
  • the stamp gear runs along loosely due to the meshing with the sealing gear.
  • the stamp gear is mounted in a floating manner along its central longitudinal axis.
  • the punching lugs of the stamp segment which depending on the design of the sealing gear either run in the radially circumferential groove of the sealing gear or are aligned congruently with the sealing segment and run in a groove that spans the sealing segment between an edge segment and another segment, thus guide the stamp gear in the frame this floating storage. Manufacturing and assembly tolerances are compensated for by this floating bearing.
  • the movable travel distance of the floating bearing is in the range of 2 mm, ie in the range of +/- 1 mm related to the middle target position.
  • Various machine elements such as adjusting rings or securing rings or the like, but also shoulders or shoulders of the shaft or axle can serve as limiting means for the travel distance.
  • the stamp gear is firmly connected to the transmission output shaft and the sealing gear is mounted in a floating manner along its central longitudinal axis.
  • an axis is preferably provided, on which the stamp gear wheel or the sealing gear wheel is rotatably mounted, depending on the design.
  • a shaft can be provided which, depending on the design, is connected to the stamping gear or to the sealing gear and is floatingly mounted together with it in bearings.
  • stamp gear wheel can thus be designed as a die-cast part, as a precision-cast part, as a sintered part, as a precision forged part, or the like.
  • each embossed tooth of the stamp gear is designed as a continuous embossed tooth in the axial direction.
  • the respective stamping tooth of the at least one edge segment and the middle segment and the stamping segment are superimposed congruently and without gaps in the axial direction, so that the respective continuous stamping tooth is on one side is formed to the other side of the punch gear.
  • an embodiment provides for one of the two embossing wheels to be removed or pivoted away. This can be for maintenance purposes or very useful for clearing paper jams.
  • the floatingly mounted embossing wheel of the embossing wheel pair is designed to be removable. However, it is particularly user-friendly to swivel away the floatingly mounted embossing wheel, with this embossing wheel together with the bearing being able to be pivoted about a pivot axis which is arranged parallel to the conveying direction and at a distance from the pivotable embossing wheel.
  • the invention can also relate to an upholstery product which has been formed by means of a stamping gear, sealing gear, stamping gear pair and/or a forming device according to the invention.
  • a cushion strand consisting of a formed section of a single-ply or multi-ply starting paper web.
  • the padding strand has two longitudinal edges extending in the direction of the web and a particularly first and/or front end edge that delimits the padding strand in the web direction.
  • the web direction may correspond to a direction in which the original paper web is conveyed into or through a cushioning material forming device, or an elongate original paper web.
  • the starting paper web can be wound up into a roll. The web direction then corresponds to the tangential direction to the roll in the area of the starting material removed from the roll.
  • the web direction, in relation to the padding strand can correspond to the direction in which the padding strand is conveyed in a cushioning material forming device or out of the cushioning material forming device.
  • the strand of padding also includes a wavy embossed area that extends parallel to the longitudinal edges in the direction of the web.
  • the embossing area includes, in particular, embossing peaks and embossing valleys and possibly punched perforations. Provision can be made for the embossing area to have a multiplicity of alternating embossing peaks and embossing valleys.
  • the pad strand comprises two opposite tubular pad sides, in particular transverse to the web direction, adjoining the embossing area transverse to the web direction and extending in the web direction.
  • immediately adjoining tubular padding sides are provided on both sides of the embossed area.
  • the upholstery sides can be be essentially the same size.
  • the size of the upholstery sides along the length of the upholstery strip in the direction of the web is preferably essentially constant, it being clear that in the case of an irregular upholstery shape the equality of the upholstery sides must be within a tolerance range of ⁇ 2 cm, in particular ⁇ 1 cm in relation to the respective upholstery tube Average radius can be determined.
  • the embossing area is preferably of the same size in the direction of the web, preferably within a tolerance range of ⁇ 1 cm or less, in particular ⁇ 0.5 cm or less.
  • the padding area can have a crumple height of at least 5 mm, in particular at least 10 mm, preferably at least 15 mm, particularly preferably at least 20 mm, and/or not more than 50 mm, preferably not more than 40 mm, particularly preferably not is more than 30 mm.
  • the cushion strand has a degree of shrinkage of at least 13% or at least 15%, in particular at least 20%, preferably at least 22%, in relation to the starting paper web.
  • the cushioning properties can be determined, for example, by placing the cushioning material on a flat, substantially non-deforming surface, such as a metal plate. Then the upholstery material is loaded flat. According to a first alternative, it can be measured which restoring force the pad opposes to the surface load. According to a second alternative, it can be measured by which deformation path the upholstery material is subjected to a predetermined Areal load, in particular a reference force based on the loaded reference pad surface is compressed.
  • the degree of shrinkage relates to a shortening of the cushioning material strand in the web direction in relation to an initial length of the initial paper web in the web direction.
  • the shrinkage dimension does not refer to a cross-web narrowing of the dunnage strand or piece in relation to an initial width of the initial paper web in a cross-web direction. Since folds or rolls are formed transversely to the web direction to form the tubular padding sides, the person skilled in the art understands that transversely to the web direction considerable changes between the width of the starting paper web and the cushion strand formed from it are always provided.
  • the degree of shrinkage preferably designates a relation between an initial length of the initial paper web and a corresponding length of padding material in the same web direction.
  • the amount of shrinkage denotes the relation of the cushion length to the initial length along the embossed area.
  • the invention also relates to a cushion strand consisting of a formed section of a single-ply or multi-ply starting paper web, which has two longitudinal edges extending in the direction of the web, a particularly first and/or front end edge that delimits the cushion strand in the web direction, and a parallel to the Longitudinal edges in web direction extending wavy embossed area includes.
  • the wavy embossing area has, in particular, embossing peaks and embossing valleys and optionally punched perforations.
  • the pad strand comprises two mutually opposite, tubular pad sides adjoining the embossing area transversely to the direction of the web and extending in the direction of the web.
  • the padding strand has a strand width of not more than 12 cm, in particular not more than 10 cm, transversely to the web direction.
  • This very much smaller padding strand width than known from the previous state of the art allows for the first time the use of generic padding strands from the formed section of a starting paper web with opposite tubular padding sides that laterally enclose a central embossing area, also for small transport containers, where plastic-based padding material is currently often used. Contrary to the prejudice that padding material based on a starting paper web with a width of no more than 12 cm is impossible to produce without losing the desired padding properties, a particularly compact padding material that still provides a high padding effect has been achieved for the first time.
  • the longitudinal edges are each formed by a rolled-up winding section of the starting material web, with the starting material web preferably being in one layer.
  • the longitudinal edges are each formed by a single rolled-up winding section.
  • the longitudinal edges are formed by a simply rolled-up winding section (with no more than one turn).
  • the starting material web in the embossing area at least one winding section, in particular both winding sections lying opposite one another transversely to the web direction, of the starting material web is held in four layers at least in transverse sections.
  • the starting paper web is preferably single-ply.
  • the four-day holding of the winding section of the Starting material web can be achieved by providing at least two layers of a first, in relation to the web direction, transversely to the right or left winding section two layers; in that a further layer in the embossing area is further provided by the central area of the starting paper web; and in that at least one further layer is also provided by paper of the starting paper web from a section, for example a second winding section, opposite to the first winding section with respect to the starting paper web middle region.
  • both the first, right-hand winding section and the second, left-hand winding section can provide at least two layers and the central area of the starting paper web can provide a fifth layer, which are connected to one another in the embossing area.
  • the right winding section and the left winding section have at least one concave fold and/or tab formed by a transverse collision with the opposite winding section, which can provide further layers in sections in the embossing area, which can be attached to one another by embossing .
  • embossing area a section-wise nine-layer mounting of a cushion strand or piece based on a single-layer starting paper can be preferred.
  • the embossing area can have a deformation area width that is at least 10 mm, in particular at least 15 mm, preferably at least 20 mm, and/or not more than 50 mm, in particular not more than 35 mm, preferably not more than 30 mm, particularly preferably not is more than 25 mm.
  • the embossing area height of the embossing area can relate to the height between the respective pair of embossing peaks and embossing valleys, in particular a pair of adjacent embossing peaks and embossing valleys.
  • a tab of a first, for example, right winding section is received in a concave fold of a second, for example, left winding section in the embossing area.
  • at least one tab can be folded in against itself in the embossing area.
  • the invention also relates to a piece of padding comprising a strand of padding formed as described above.
  • the piece of padding has a second, in particular rear, end edge.
  • a padding strand generally refers to a continuous coherent band made from a formed section of an original paper web.
  • a piece of upholstery can be separated from a strand of upholstery, for example by a cutting tool such as a rotary blade, guillotine, by manual tearing along a preferably toothed blade or the like, with the process of separating a piece of upholstery from a strand of upholstery leading to the formation of the piece of upholstery and a new strand of upholstery.
  • the cushioning piece preferably consists of a reshaped section of a single- or multi-ply paper web.
  • the piece of padding has, in particular, two longitudinal edges extending in the web direction, a first and/or front end edge delimiting the padding strip in the web direction, and a second and/or rear end edge. It is understood that the first end edge faces the second end edge in the web direction.
  • the length of the piece of padding can be determined from end edge to end edge.
  • the piece of padding also includes a wavy embossed area that extends essentially parallel to the longitudinal edges in the direction of the web.
  • the embossed area of the piece of padding comprises at least one embossed crest and/or at least one embossed valley.
  • the embossed area of the piece of padding can optionally have at least one punched perforation.
  • the piece of padding comprises two opposite tubular padding sides adjoining the embossed area transversely to the direction of the web and extending in the direction of the web.
  • the padding piece can have a padding piece length with a degree of shrinkage of at least 13% or at least 15%, in particular at least 20%, preferably at least 22%. Additionally or alternatively, the padding piece has a piece width of not more than 12 cm, in particular not more than 10 cm, transversely to the web direction. Once a piece of padding is formed from a strand of padding, it may be preferred that the piece width of the piece of padding corresponds to the strand width of the strand of padding.
  • the piece width is greater than the piece length.
  • the piece length designates the extent of the padding piece in the web direction and the piece width designates the extent of the padding piece transversely to the web width.
  • the length of the piece preferably refers to the extension of the piece of padding along the embossed area.
  • the transverse extent of the padding be referred to, which extends over the opposite tubular pad sides and the embossed area provided between them. It can be preferred that the piece width is determined according to the direction of flank extension of the embossing peaks and/or valleys.
  • the guiding principle was that for a sufficient padding material quality it was absolutely necessary to always provide a piece length of padding pieces in the web direction along the embossed areas, which was greater than the piece width of the corresponding padding piece.
  • a stable and high-quality padding quality can also be achieved for those pieces of padding in which the piece width is greater than the piece length, for example at least twice as large, at least three times as large, or at least four times as large.
  • the padded tubes are correspondingly short on the side of the embossing area and approach a ring shape, the winding diameter of which, contrary to the prior art, is no longer smaller than the piece length but can be the same size, in particular even larger.
  • the upholstery piece has a length of no more than 30 cm or no more than 25 cm, in particular no more than 15 cm, preferably no more than 10 cm or no more than 5 cm, particularly preferably no more than 3 cm.
  • the piece of padding has a piece length of at least 1.5 cm or at least 2 cm, in particular at least 5 cm, preferably at least 8 cm. Additionally or alternatively, the piece of padding has a piece width of at least 4 cm or 5 cm, in particular at least 8 cm, preferably at least 10 cm. The padding width can particularly preferably be in a range from 7 cm to 10 cm, particularly preferably in the range from 8 cm to 9 cm. According to a particularly preferred embodiment of a padding piece, the padding piece consists of a section of a single-ply starting paper web. It should be understood that the term "section" in relation to the separation of a piece of padding from a starting paper web also applies to pieces of padding that have been severed by a method other than cutting, such as tearing.
  • the invention also relates to a padding material forming device for forming a single-ply or multi-ply starting paper web into a padding material in the form of a padding strand or a padding piece, as described above.
  • an upholstery material forming device comprises at least one embossing device for shaping the embossing area, with the embossing device in particular comprising a perforation device for making punched perforations in the upholstery material, in particular in the area of an embossing area formed by the embossing device, preferably exclusively in the embossing area.
  • the embossing device can preferably be designed in such a way that it forms a padding material from a padding material starting paper web, which padding material is formed on both sides of a central embossing area with tubular padding sides extending in the web direction.
  • the emboss area may be formed by incorporating a plurality of emboss ridges and emboss valleys into the cushioning material.
  • this comprises at least one preforming station for rolling up the winding sections lying opposite one another transversely to the web direction of the starting paper web.
  • the preforming station and the embossing device are matched to one another in such a way that the rolled-up winding sections abut one another transversely to the direction of the web in an infeed area of the embossing device.
  • the entry area of the embossing device can have a width corresponding to a toothed wheel width of the embossing device. Alternatively, the run-in area can be wider than the gear wheel width.
  • the lead-in area may have a longitudinal extension that is upstream in the web direction from an engagement point where the outer peripheral curves of the intermeshing embossing tools come into contact with one another, counter to the web direction for a length is not larger than the radius of a stamping wheel, preferably not larger than half the radius.
  • the embossing device comprises two intermeshing embossing rollers.
  • the embossing rollers comprise a number of axial segments.
  • at least one embossing roller has at least one punching segment arranged adjacent to at least one embossing segment in the axial direction for making punched perforations in the embossing area.
  • at least one embossing roller comprises a punching segment arranged between two embossing segments in the axial direction for making punched perforations in the embossing area.
  • Both embossing rollers preferably each have at least one axial embossing segment in order to introduce punched perforations into the embossing area.
  • the embossing rollers can have outer axial segments in the axial direction, which have an at least partially rounded transition from the axial end face to the peripheral face.
  • a rounded transition is preferably provided, in particular only on the teeth, preferably only in the area of the tooth tips. In particular, the transition can be completely rounded. It has been shown that embossing rollers of this type are particularly suitable for preventing the thin, single-ply starting material web from tearing and thus being able to ensure a high padding material quality even with a small padding width and/or length.
  • a padding material forming device comprises a take-off device, which communicates a conveying speed to the starting paper web arranged or to be arranged in the supply of starting material, with the take-off device in particular being arranged in front of the embossing device in the conveying direction and/or being provided separately from the embossing device.
  • the embossing device and the take-off device for relieving the strain on the starting paper web in the area of the embossing device and/or possibly in the infeed area are matched to one another, preferably synchronized.
  • the cushioning material forming device has a receptacle for the supply of starting material of the starting paper web, in particular the starting paper web in the form of a preferably coreless roll.
  • the cushioning material forming device has a separating device arranged immediately behind the embossing device in the conveying direction for separating pieces of padding from a cushion strand and, if necessary, a removal device arranged directly behind the separating device for gripping separated pieces of padding. It can be preferred that the conveying direction corresponds to the web direction.
  • FIG. 1 shows a side sectional view of a forming device according to the invention
  • FIG. 2 shows a sectional view of a forming device according to the invention viewed from above;
  • FIG. 3 shows a side view of a stamping gear pair according to the invention
  • FIG. 4 shows a detailed view of the meshing areas of the stamping gear pair according to FIG. 3;
  • FIG. 5 shows a front view of the stamping gear pair according to FIG. 3;
  • FIG. 6 shows a side view of an edge segment for a sealing or stamping gear according to the invention
  • FIG. 7 shows a side view of a middle segment for a sealing or stamping gear according to the invention
  • FIG. 8 shows a side view of a punching segment for a punch gear according to the invention.
  • FIG. 9 shows a side view of a sealing segment for a sealing gear wheel according to the invention.
  • FIG. 10 is a perspective view of one according to the invention.
  • FIG. 11 is a perspective view of one according to the invention.
  • Figure 12 is a schematic representation of an upholstery product
  • FIG. 13 shows an upholstery piece according to the invention
  • FIG. 14 shows a schematic representation of a cushioning material forming device according to the invention.
  • FIG. 15 shows a schematic representation of the cushioning material forming device according to the invention according to FIG. 14;
  • FIG. 16 shows a schematic sectional view through a strand of upholstery material according to the invention or a piece of upholstery according to the invention
  • Figure 17a is a plan view of a piece of padding
  • Figure 17b is a plan view of a rolled up and unfolded piece of padding made from a single ply paper web
  • FIG. 18 shows a schematic measurement setup for determining padding properties
  • FIG. 19 shows an embodiment of a cushioning material forming device
  • FIG. 20 shows another view of the cushioning material forming device according to FIG. 19.
  • a forming device according to the invention is generally provided with the reference number 1 .
  • a stamping gear pair according to the invention is generally provided with the reference number 3 .
  • a stamp gear in accordance with the present invention is generally designated by the reference numeral 100 .
  • a sealing gear in accordance with the present invention is generally designated by the reference numeral 200 .
  • the stamping gear pair 3 according to the invention in the preferred embodiment shown here consists of a stamping gear 100 according to the invention and a sealing gear 200 according to the invention. It is clear that a stamping gear pair according to the invention can also be realized with one or two gears other than those shown.
  • Fig. 1 shows a side sectional view of the forming device 1 with a stamping gear pair 3, which consists of a punch gear 100 and a sealing gear 200, which mesh and roll on each other.
  • the web material not shown in detail, is conveyed from the right in the conveying direction F through the preforming device 9 to the embossing gear pair 3 according to the figure.
  • the upholstery product 2 (not shown in detail) is released in the conveying direction F from the embossing gear pair 3 .
  • a frame 5 supports the pair of embossing gears 3 and the preforming device 9.
  • FIG. 2 shows a sectional plan view of the forming device 1.
  • the web material is brought in the conveying direction F through the preforming device 9 to the pair of embossing rollers 3.
  • FIG. The preforming device comprises a preforming funnel 93 and guide rods 91 lying opposite one another and converging in the conveying direction F. Between the guide rods 91, at their embossing roller pair-side end, there is a rod distance d which is not fallen short of.
  • the bar spacing d can range from about 5 mm to about 15 mm are, for example, about 7 mm.
  • the front ends of the guide rods 91 in the conveying direction F determine a delivery distance c.
  • the delivery distance is in the range of about 20 mm to about 50 mm, preferably about 30 mm.
  • the preforming device 9 is designed and set up to fold or roll inward the outer longitudinal edges of a web material which are opposite to the web direction and are moved in the conveying direction F through the preforming device 9 .
  • the guide rods 91 serve to guide the rolled or folded longitudinal sections of the web material.
  • the subsequent transverse width of the upholstered product 2 transversely to the conveying direction F is essentially defined by the preforming device 9 .
  • the pair of embossing rollers 3 is designed and configured to impart alternating embossing peaks and valleys to a central region of the preformed web material, as well as optional die-cuts, to form the upholstery product 2 .
  • the frame 5 is formed with a channel width e, which can correspond to the exit width of the preform funnel 93.
  • the channel width e is in the range from about 50 mm to about 200 mm, in particular in the range from about 80 mm to about 120 mm, preferably about 100 mm.
  • the embossing gear pair 3 is arranged centrally in the channel 31 .
  • the embossing gear pair 3 is rotatably mounted on the frame 5 . It can preferably be provided that a driven gear wheel, in particular the sealing gear wheel 200, is held stationary on the frame 5 and the other gear wheel, in particular the stamp gear wheel 100, is held spring-loaded with a spring device 7 illustrated below with reference to FIG.
  • the gears 100, 200 with parallel gear axes A 1 , A 2 are mounted on the frame 5, the gears 100, 200 with parallel gear axes A 1 , A 2 are mounted.
  • the stamp gear 100 has a stamp gear axial width b1 and the seal gear has a seal gear axial width b 2 .
  • the axial width b 1 of the stamping gear 100 can be equal to or smaller than the axial width b 2 of the sealing gear 200 .
  • the axial width b 1 , b 2 of the gears essentially corresponds to the discharge distance c of the preforming device 9, it being possible for the axial width of the gears to be slightly smaller than the discharge distance c.
  • the axial width b1, b2 can be in the range of 20 mm to 50 mm, preferably in the range of 25 mm to 30 mm.
  • the axial width b 2 of the sealing gear 200 can be as large as or be slightly larger than the axial width b 1 of the stamp gear 100, for example about 0.5 mm wider.
  • stamping gear pair 3 consisting of a stamp gear 100 and a sealing gear 200 is described in detail.
  • the stamping gear 100 is composed of segments which are shown in FIGS. 7-9. In the preferred embodiment depicted in the figures, both the stamping gear 100 and the sealing gear 200 partially use the same segments, namely outer segments 121 and 221, respectively, and middle segments 141 and 241, respectively. Only the stamping gear 100 comprises stamping segments 131 with stamping teeth and only the sealing gear 200 comprises sealing segments 231 The segments have a disk-like structure and each have an axial width. Although in the preferred embodiment shown the various disc segments are each formed in one piece, according to an alternative embodiment one or more of the illustrated segments could be formed in multiple parts, for example by several discs lying axially one on top of the other.
  • the punching nose width or punching segment axial width a 13 is smaller than the sealing segment axial width a 23 .
  • An axial opening width is defined by the sealing segment axial width a 23 , into which the punching lugs of the stamp segment 131 can penetrate into the sealing gear wheel 200 . If the opening width is too wide, the web material is sometimes not perforated but merely pulled through the gap in the conveying direction F. If the opening is dimensioned too narrow, there is a risk that a punching nose will jam between the edge segment 221 and/or middle segment 241 adjacent to the sealing segment 231 .
  • Fig. 3 shows the meshing gears of the stamping gear pair 3 and Fig. 4 in detail the radial distance a between them.
  • the lower Gear wheel which is shown here as sealing gear wheel 200, rotates counterclockwise to convey the web material in the conveying direction F.
  • the driven gear comes into tangential contact with the idle gear, here stamp gear 100, to drive it.
  • a tangential physical contact between the tooth flanks can occur.
  • Between the tips of the teeth of the stamping teeth 123, 223 of one gear and the bottom of the valley 225, 125 of the other gear there is always a radial distance with a distance a. This radial distance can be covered with the web material or upholstery product 2.
  • Fig. 5 shows a view of the embossing gear pair 3 looking in the direction corresponding to the conveying direction.
  • the stamp gear 100 has an axis of rotation that defines the axial direction A 1 .
  • the sealing gear 200 has an axis of rotation that defines the axial direction A 2 .
  • the axis of rotation of a gear for example the sealing gear 200, can be stationary and the other axis of rotation can be movably mounted with a spring device 7 transverse to the axial direction (here: A 1 ) and transverse to the conveying direction F.
  • the axis of rotation and thus the axial direction A 1 , A 2 of the stamping gear 100 and the sealing gear 200 are oriented in parallel.
  • the exemplary punch gear 100 shown here is composed of a first edge segment 121, a first punch segment 131, a middle segment 141, a second punch segment 131 and a second edge segment 121.
  • the sealing gear 200 shown here as an example is in the axial direction A 2 together from a first edge segment 221, a first sealing segment 231, three middle segments 241, a second sealing segment 231 and a second edge segment 221.
  • FIGS. 6 and 7 each show cross-sectionally congruent edge segments 121, 221 and middle segments 141, 241.
  • the gears or segments of the various gears are not necessarily shaped congruently.
  • An edge segment 121 with a view of the outer side surface 129 is shown in FIG. 6 .
  • the edge segment 121 comprises alternating embossed teeth 123 and embossed valleys 125.
  • Each embossed tooth 123 has a transition region 128 from the tooth head 124 to the axial outer side surface 129, which in the present embodiment is formed by a radius, the radius being in the range from 1 mm to 20 mm, preferably in the range 2 mm to 10 mm. No transitional area is provided in the area of the tooth base or valley base 126 .
  • the radially innermost point of the valley floor 126 defines an edge segment inner radius r 21 .
  • the radially outermost point of the tooth crest 124 determines the edge segment outer radius R 21 .
  • the inner side surface opposite the outer side surface 129 has the same shape as the middle segment 141 described below with reference to FIG. 7.
  • a middle segment is shown.
  • the axially outer sides of the center segment are flat and preferably oriented at right angles with respect to the gear axis.
  • the middle segment 141 comprises alternating embossing teeth 123 and embossing valleys 125.
  • the radially innermost point of the valley bottom 126 defines a middle segment inner radius r 24 .
  • the radially outermost point of the tooth crest 124 determines the mid-segment outer radius R 24 .
  • the cross-sectional shapes of the middle segment 141 and the edge segment 121 of the stamp gear 100 are the same, in particular congruent.
  • the cross-sectional shapes of the middle segment 241 and the edge segment 221 of the sealing gear 200 are the same, in particular congruent.
  • FIG. 8 shows a punch segment 131.
  • a plurality of punching lugs 135 are arranged on the outside of the punch segment 131.
  • FIG. A tooth section 133 is arranged between adjacent punching lugs 135 . Tooth sections 133 and punching noses 135 are arranged alternately on the outer circumference of the stamp segment 131 . It can be preferred that a depression 136 is provided between adjacent tooth sections 133 and punching noses 135, the depressions 136 defining a punch segment inner radius r 13 which is smaller than the punching nose radius R 35 .
  • the tooth tips 134 of the tooth sections 133 define a punch segment outer radius R13 at the outermost point in relation to the axis of rotation.
  • the punch noses 135 define a punch nose radius or punch radius R 35 . It is conceivable that the punching lugs 135 without depressions 136 continuously, preferably in the shape of a circle, between the adjacent tooth sections 133 (along the dash-dot line).
  • the punch nose radius R 35 is smaller than the punch segment outer radius R 13 and smaller than the outer radius R 13 , R 24 of the edge section and/or the middle section.
  • the punching nose radius R 35 is larger than the inner radius r 13 , r 24 of the edge section and/or the middle section.
  • the inner radii r 13 , r 21 , r 24 of the edge segment 121, the middle segment 141 and the stamp segment 131 are of the same size.
  • the outer radii R 13 , R 21 , R 24 of the edge segment 121, the middle segment 141 and the stamp segment 131 are the same size.
  • the cross-sectional shapes of the embossing teeth 123 and the tooth section 133 are the same, in particular congruent.
  • FIG. 9 shows a sealing segment 231 which, in the embodiment shown here, is shown in the form of a ring with a constant outer radius R 23 .
  • the outer radius of the sealing segment is always smaller than the outer radius R 21 and/or R 24 of the edge segment 221 and the middle segment 241.
  • the outer radius of the sealing segment R 23 preferably corresponds essentially to or is identical to the inner radius r 21 and/or r 24 of the edge segment 221 and the middle segment 241.
  • the outer radius R 23 of the sealing segment 231 is preferably matched with respect to the punching nose radius R 35 , in particular such that between the punching nose radius R 35 and the sealing segment outer radius R 23 in the operational state of the embossing gear pair 3, a radial stamp spacing remains, with the radial stamp spacing in particular being at least as large as the spacing width a of the radial spacing.
  • the sealing segment could have an outer edge that runs in a wavy manner, for example, which in places has a smaller radius than the outer radius R23 (not shown in detail).
  • FIGS. 10 and 11 show a perspective representation of the gears 100, 200 already described above with regard to the previous FIGS. 3 to 5 and their segments, which were described above in FIGS. 6 to 9.
  • FIG. 10 shows the spring device 7 with which the stamp gear 100 is held on the frame 5 .
  • the spring device 7 includes compression springs 71, which bias an axis 73 of the punch gear 100 against a counter bearing 75 with a spring force.
  • Figure 12 shows a schematic representation of a padding product 2 according to the invention, which is produced from a web-like starting material by means of a device 1 according to the invention and/or whose padding width b measured transversely to the longitudinal direction of the web or conveying direction F is less than 12 cm, whose padding length t is in the longitudinal direction of the web is less than 30 cm, the vertical extent k of which is in the range from 2 cm to 3 cm.
  • the padding product 2 comprises two lateral padding areas or crumple cavities 21, 23 extending in the longitudinal direction of the web, which are formed by radially inward folding or inward rolling of lateral starting material web sections of the starting material.
  • the upholstery product 2 comprises a central fastening and/or deformation zone 22 in which the folded-over starting material web sections overlap and are bonded to one another.
  • a width m of the attachment and/or deformation zone, measured in the width direction, can be in the range from 2 cm to 2.5 cm, the vertical extension h of which is less than 1.5 cm or less than 1 cm.
  • a piece of padding according to the invention is generally designated by the reference number 2 .
  • a cushioning material forming device according to the invention is generally given the reference number 1 .
  • the padding piece consists of a piece of a single-ply starting paper web, two longitudinal edges 303 extending in the web direction, a front end edge 307 and a rear end edge 309 opposite the front end edge 307.
  • the padding piece has a central wavy embossed area extending in the web direction B 305 and on each side of the embossing area an adjoining tubular padding side 304 extending transversely to the web direction.
  • the embossing area has a large number of embossing areas 351 and embossing valleys 353 and, if necessary, punched perforations 355.
  • the piece of padding 2 is formed by dividing, preferably cutting or tearing off, a strand of padding that was formed from a web of paper starting material in a padding material forming device 1 .
  • the strand of padding material differs from the piece of padding 2 essentially in that the piece of padding has a certain padding length t, whereas the strand of padding has a front end 307, but in the cushioning material forming device 1 counter to the conveying direction F becomes endless or quasi-endless starting material 4.
  • the embossing area 305 is formed in the conveying direction F and the web direction B corresponding thereto in relation to the conveying direction F through the padding material forming device.
  • the cushion length t is defined in the web direction B from the front end 307 to the rear end 309 of the cushion piece 2 .
  • the piece of padding has a piece width b, which generally corresponds to the width of the strand.
  • the piece of padding 2 can be divided into the central embossing area 305 and the padding sides 304 provided on both sides of the embossing area 305.
  • the starting paper web 4 is formed into a tubular shape.
  • the tubular shape is realized by a winding section 323 or 324, which is formed by wrapping inwards starting from the longitudinal edge of the starting material web.
  • the padding piece 2 has a right winding section 323, a left winding section 324 and the central embossing section 305.
  • the padding piece 2 has been formed from a single-ply starting paper web 4 .
  • the piece of padding 2 is predominantly in two layers.
  • the padding piece 2 has at least four layers, in that at least the right or left winding section 323, 324, an opposite longitudinal wall end 325, 326 and the winding area 328 of the starting paper web lie one above the other.
  • the embossing area 305 is formed by embossing mountains 351 and embossing valleys 353 that are alternately introduced into the padding strand or the padding piece 2
  • Embossing genera 351 and embossing valleys 353 can be effected, for example, by an embossing device 105 of the cushioning material forming device 1, which can be formed, for example, by embossing rollers that mesh with one another.
  • Punched perforations 355 can also be introduced in the embossing area 305, which completely or partially penetrate the padding strand or the padding piece 2 transversely to the direction of the web. The punched perforations serve to frictionally connect the several layers of the starting material web 4 arranged in the embossed area 305 to one another in order to prevent or at least make it more difficult for the cushion strand or the cushion piece 2 to unfold.
  • the padding material forming device 1 can have a preforming station 9 upstream of the embossing device 105 .
  • the preforming station 9 can have a funnel-shaped inlet and/or a central guide, for example a guide plate and/or guide rods.
  • the web material is guided through the preforming station 9 in the conveying direction F, with the longitudinal edges 325 and 326 of the starting material web 4 being wound inward transversely to the web direction B, so that the windings 323 and 324 are formed.
  • the embossing device 105 and the preforming station 9 are preferably coordinated with one another in such a way that the preforming station 9 presses the winding sections 324 and 325 against one another in an inlet area 104 at the entrance of the embossing device 105 .
  • the preforming station 9 presses the winding sections 324 and 325 against one another in an inlet area 104 at the entrance of the embossing device 105 .
  • concave folds are formed in the embossing area 305 in the winding section 324 where the opposite winding section 323 presses against the aforementioned winding section 324 so that it collapses radially.
  • a tab 323a of the second wrapping portion 323 may press transversely against an outside of the first wrapping portion 324 and form a concave crease 324a in this wrapping portion 324 .
  • the fold 324a forms an additional double layer.
  • tabs 323a may be urged to collapse against themselves by the resistance of the opposing wrap portion 324.
  • a flap 323a can be folded in on itself.
  • a flap 323a folded in on itself also forms an additional double layer in the embossed area 305. It is clear that in the web direction B along the embossing area 305 a multiplicity of tabs 323a, in particular tabs 323a folded in against one another, as well as concave folds 324a can be formed in a random sequence.
  • At least 5, at least 10 or at least 20 concave folds 324a and/or flaps 323a folded in on themselves can be formed along a unit length of 1 m along the embossing strand.
  • Continuous tabs 323a and/or folds 324a are formed along the padding piece 2 or the padding strand in the web direction B at least along 30%, preferably at least along 50%, in particular at least along 75% or along the entire length of the embossed area 305.
  • a multi-layered structure can be formed in the area 305 from a single-layer starting paper web 4, which ensures a particularly stable padding material from a single-layer starting paper web.
  • the cushioning material reshaping device can be provided with a withdrawal device 101 which is designed and set up to withdraw the starting paper web 4 from a receptacle 102 and to convey it into the cushioning material reshaping device 1 (FIGS. 14 and 15). It can be preferred that the withdrawal device 101 and the embossing device 105 are matched to one another in such a way that the paper starting material 4 is strain-relieved in the area of the inlet 104 or the embossing device 105 .
  • a separating device 109 e.g. a guillotine, can be provided downstream of the embossing device 105 and a removal device 107 provided in the conveying flow direction F behind the separating device 109, which grips the individual padding pieces 2 and ejects them from the padding material forming device.
  • FIG. 16 shows a schematic cross-sectional view of a strand or piece of padding 2 according to the invention.
  • the piece of padding 2 has a padding width b in the range of about 8 cm to 9 cm.
  • the tubular cushion pads on the cushion sides 304 on the opposite sides of the cushion piece 2 are formed into coils 323,324.
  • the cushion sides 304 have a crush height x ranging from about 20 mm to about 30 mm.
  • the thickness d in area 5 is much smaller than the crumple height x.
  • the thickness dd is preferably in the range ⁇ 10 mm, in particular ⁇ 5 mm.
  • the thickness dd can be, for example, in the area of a reversal point either of the cushion valley or of the Polsterbergs can be determined.
  • the width z of the deformation area 305 is preferably in the range from 20 mm to about 25 mm. At least one of the padding sides 304 has a greater transverse width than the deformation width z of the embossing area 305. Both the right padding side 304 and the left padding side 304 preferably have a larger crumple area width than the deformation area width z.
  • the crush zone widths on the left cushion side 304 and the right cushion side 304 are preferably substantially the same.
  • the width of the crumple area can particularly preferably correspond to the height x of the crumple area.
  • FIGS. 17a and 17b serve to illustrate the determination of the pad length t and the paper web length tex corresponding thereto. Both the pad length t and the paper web length tex must always be measured in the center of the embossing area 305.
  • the shrinkage dimension S can be determined using the following formula:
  • FIG. 18 illustrates a measurement setup 400 for determining cushioning properties.
  • the padding material 2 is placed on a flat, essentially deformation-free surface 401, such as a wooden or metal plate. Then the padding material 2 is loaded flat.
  • it can be measured which restoring force the pad counteracts with the surface load.
  • it can be measured by which deformation path the cushioning material is compressed under a predetermined surface load, in particular a reference force in relation to the loaded reference cushioning surface.
  • Table A shows measurement results for various upholstery materials according to the invention made from a paper material web with a grammage of 70 g/m 2 (Table A; hereinafter “upholstery A”) and a grammage of 90 g/m 2 (Table B; hereinafter “upholstery B”).
  • the paper web materials have a web width of 350 mm.
  • cushion A has a cushion height of approx. 33 to 34 mm
  • cushion B a cushion height of approx. 34 to 36 mm.
  • an initial height ho corresponding to the crumple height x of an unloaded upholstery material is first determined.
  • the crumple height x at a light, loosely lying flat support plate 403 measured in the unloaded initial state is measured in the unloaded initial state.
  • a mean value can be determined from measurements at 4 measuring points.
  • a plate measuring 100 mm x 270 mm and about 4 mm thick, for example made of dimensionally stable corrugated cardboard, can be used as the support plate.
  • hl is determined: To do this, the test load 405 is placed on the support plate 403 and loaded for 10 seconds. The height is then measured again at the same measuring points and a mean value hl is determined from this. Then h2 is determined: The test load is removed from the support plate 403, waits 10 seconds and the height is measured again at the same measuring points and the mean value is determined as h2. Then the restoring force can be determined.
  • FIG. 19 shows a side sectional view of the cushioning material forming device 1 with an embossing gear pair 105, which consists of two embossing rollers 120, 130 which mesh and roll on one another.
  • the paper material web not shown in detail, is conveyed from the right in the conveying direction F through the preforming device 9 to the pair of embossing gears 105 according to the figure.
  • the upholstery product not shown in detail, is released in the conveying direction F from the embossing gear pair 105 .
  • a frame carries the pair of embossing gears 105 and the preforming device 9.
  • FIG. 20 shows a sectional top view of the cushioning material forming device 1.
  • the paper material web not shown in detail, is brought in the conveying direction F through the preforming device 9 to the embossing roller pair 120, 130.
  • the paper material web not shown in detail, is brought in the conveying direction F through the preforming device 9 to the embossing roller pair 120, 130.
  • Preforming device 9 comprises a preforming funnel 93 and guide rods 91 lying opposite one another and converging in the conveying direction F.
  • the preforming device 9 is designed and set up to guide the outer longitudinal edges of the web of paper material, which are opposite one another transversely to the web direction and which is moved in the conveying direction F through the preforming device 9 tuck or roll up inside.
  • the guide rods 91 are used to guide the rolled or folded longitudinal sections of the paper material web.
  • the subsequent transverse width of the upholstered product transversely to the conveying direction F is essentially defined by the preforming device 9 .
  • the embossing roller 120 is composed of segments, namely outer segments 221 and middle segments 241.
  • the embossing roller 120 also includes punching segments 231, which can be formed as stamping and/or sealing segments.
  • the segments are constructed like disks and have a respective axial width.
  • the various disc segments are each formed in one piece, according to an alternative embodiment one or more of the illustrated segments could be formed in multiple parts, for example by several discs lying axially one on top of the other.
  • the sealing gear 120 shown here as an example is made up of a first edge segment 221, a first sealing segment 231, three middle segments 241, a second sealing segment 231 and a second edge segment 221 in the axial direction A.
  • the pair of embossing rollers 120, 130 is designed and set up to introduce alternating embossing peaks and valleys in a central region of the preformed web of paper material and, if necessary, to form punchings around the upholstery product.

Landscapes

  • Machines For Manufacturing Corrugated Board In Mechanical Paper-Making Processes (AREA)

Abstract

L'invention concerne une roue dentée de poinçon (100) conçue pour une paire de roues dentées d'estampage (3) d'un dispositif (1) pour façonner un matériau en bande, en particulier une bande de papier, de manière à obtenir un produit de rembourrage (2), la roue dentée de poinçon (100) comportant une pluralité de dents d'estampage (123), des creux (125) agencés entre des dents d'estampage (123) adjacentes et un nez d'estampage (135) disposé dans la zone des creux (125). Selon l'invention, la roue dentée de poinçon (100) comportant des dents d'estampage (123, 133) continues dans la direction axiale (A1).
EP22801346.2A 2021-09-28 2022-09-28 Roue dentée de poinçon, roue dentée de scellement, paire de roues d'estampage et dispositif de façonnage d'un matériau en bande pour obtenir un produit de rembourrage Pending EP4408655A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102021125078.1A DE102021125078A1 (de) 2021-09-28 2021-09-28 Verpackungspolsterstreifen
DE102021125089.7A DE102021125089A1 (de) 2021-09-28 2021-09-28 Stempelzahnrad, Siegelzahnrad, Prägezahnradpaar und Vorrichtung zum Umformen eines Bahnmaterials in ein Polstererzeugnis
PCT/EP2022/077003 WO2023052438A1 (fr) 2021-09-28 2022-09-28 Roue dentée de poinçon, roue dentée de scellement, paire de roues d'estampage et dispositif de façonnage d'un matériau en bande pour obtenir un produit de rembourrage

Publications (1)

Publication Number Publication Date
EP4408655A1 true EP4408655A1 (fr) 2024-08-07

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Application Number Title Priority Date Filing Date
EP22801346.2A Pending EP4408655A1 (fr) 2021-09-28 2022-09-28 Roue dentée de poinçon, roue dentée de scellement, paire de roues d'estampage et dispositif de façonnage d'un matériau en bande pour obtenir un produit de rembourrage

Country Status (2)

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EP (1) EP4408655A1 (fr)
WO (1) WO2023052438A1 (fr)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6387029B1 (en) * 1998-10-02 2002-05-14 Ranpak Corp. Cushioning conversion machine and method with stitching assemblies
WO2010078560A1 (fr) * 2009-01-02 2010-07-08 Nuevopak International Limited Engrenages décalés et leurs procédés d'utilisation pour produire un matériau amortisseur de chocs
US9427928B2 (en) * 2009-08-25 2016-08-30 Sealed Air Corporation (Us) Method and machine for producing packaging cushioning
WO2018005902A1 (fr) * 2016-06-30 2018-01-04 Ranpak Corp. Procédé et machine de conversion de fardage et produit de fardage

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