EP2531348A1 - Alvéole expansible, procédé pour sa fabrication continue et structure sandwich - Google Patents

Alvéole expansible, procédé pour sa fabrication continue et structure sandwich

Info

Publication number
EP2531348A1
EP2531348A1 EP11708977A EP11708977A EP2531348A1 EP 2531348 A1 EP2531348 A1 EP 2531348A1 EP 11708977 A EP11708977 A EP 11708977A EP 11708977 A EP11708977 A EP 11708977A EP 2531348 A1 EP2531348 A1 EP 2531348A1
Authority
EP
European Patent Office
Prior art keywords
strips
honeycomb core
double
incisions
strip
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11708977A
Other languages
German (de)
English (en)
Other versions
EP2531348B1 (fr
Inventor
Max Britzke
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.)
Technische Universitaet Dresden
Original Assignee
Technische Universitaet Dresden
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 Technische Universitaet Dresden filed Critical Technische Universitaet Dresden
Publication of EP2531348A1 publication Critical patent/EP2531348A1/fr
Application granted granted Critical
Publication of EP2531348B1 publication Critical patent/EP2531348B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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
    • B31D3/00—Making articles of cellular structure, e.g. insulating board
    • B31D3/02—Making articles of cellular structure, e.g. insulating board honeycombed structures, i.e. the cells having an essentially hexagonal section
    • B31D3/0223—Making honeycomb cores, e.g. by piling a plurality of web sections or sheets
    • B31D3/023—Making honeycomb cores, e.g. by piling a plurality of web sections or sheets by cutting webs longitudinally into strips, piling these strips and uniting them along lines perpendicular to the cuts

Definitions

  • Expandable honeycomb core process for its continuous production and sandwich composite
  • the invention relates to an expandable honeycomb core according to the preamble of claim 1.
  • the invention further relates to a method for its continuous production according to the preamble of claim 7 and a plate-shaped or three-dimensionally shaped sandwich composite according to claim 1. 1
  • Such plate-shaped or three-dimensionally shaped sandwich composites generally consist of a light core layer and two cover layers, which applied on both sides of the core layer to produce the strength in the composite.
  • Light cores with a cavity structure generally have a significantly lower density compared to the cover layers.
  • a variant for producing a cavity structure are expandable honeycomb cores.
  • the expandable honeycomb cores under discussion here are preferably used as the core layer for bending and buckling resistant sandwich panels and shells.
  • Dka honeycomb structure is created by expanding (stretching) honeycombed strips. Advantages of the honeycomb structure are, in particular, a high specific compressive strength transverse to the plate plane, an enormous weight saving of the sandwich components and a reduced consumption of raw materials. expandable
  • Honeycomb cores consist, for example, of paper (kraftliner, testliner, corrugated substance or the like) or of aluminum. They are used to make sandwich components in
  • the cover layers of these sandwich composites have a small thickness, are shear-resistant connected to the core layer and are usually made of plastic (glass or carbon reinforcement possible), metal, wood or wood material, paper / cardboard, artificial or natural fibers.
  • Conventional expandable honeycomb cores are made by adhering individual strips to a honeycomb structure. Such a honeycomb core of
  • honeycomb core referred to there by the term paper net consists of individual identical superimposed paper strips of any width. These strips are connected with each other in such a way that a honeycomb-like structure is created when they are pulled apart.
  • the honeycomb structure in each case alternately simple webs and double webs.
  • double web designates the web portion of two connected strips.
  • Honeycomb cores produced by bonding individual strips or a continuous web of material and methods for their production are known e.g. Also known from the patents DE 196 09 309 A1 herring, US 4,992,132 Schmidilin or US 5,334,276 Meier.
  • honeycomb core which is to be prepared without the use of adhesive.
  • This honeycomb core is to be manufactured in a continuous process. This should also significantly reduce the use of adhesive in the production of plate-shaped or three-dimensionally shaped sandwich composites.
  • honeycomb core has a structure that is comparable to the structure of conventional hexagonal honeycomb cores or
  • honeycomb core is similar.
  • the preservation of a more or less pronounced honeycomb shape depends on the materials used.
  • Advantageous embodiments of the honeycomb core are the subject of dependent subclaims.
  • a plate-shaped or three-dimensionally shaped sandwich composite with the features mentioned in claim 11.
  • a three-dimensionally shaped sandwich composite is meant by the plate-like expression different sandwich composites. Their manufacturability depends on the geometry and the material behavior of the honeycomb core.
  • the expandable honeycomb core is produced by individual strips of a web or strip-shaped starting material are provided with incisions according to a specific pattern, whereby the length of the single and double webs is determined. Subsequently, the individual strips are inserted into each other at the incisions. The nesting is done so that in the region of the double webs a connection is formed, which does not arise by gluing, but only by overlapping between two incisions. The incisions are arranged so that the nesting of the individual strips can be carried out successively by inserting each of the same side. Thus, this process can be carried out as a continuous manufacturing process.
  • the use of adhesive can be completely dispensed with.
  • the strips can be detached from each other again at any time.
  • the strips can be fixed in the further processing solely by the handling of the expandable honeycomb core by the honeycomb core is stored or guided on a flat surface.
  • honeycomb core If an increased handling of the honeycomb core is required for processing, can be done by a single punctual adhesive application per strip fixing against the slipping of the strips to each other. Such a fixation can also be done by a mechanical hooking of the strips, for example in the form of stamped elevations.
  • Circular blade on a knife shaft wherein the longitudinal sections are the later
  • adjacent webs overlap in the region of the double webs, and thus virtually creates an "endless" expandable honeycomb core.
  • the expandable honeycomb core may be expanded and formed into a plate-shaped or three-dimensionally shaped one
  • Sandwich composite be further processed.
  • the inventive method allows a continuous production and a reduction of material and manufacturing costs.
  • the properties of the honeycomb core are those of a conventionally manufactured
  • Fig. 1 an expanded honeycomb core
  • Fig. 2 shows a detail of an expanded honeycomb core
  • Fig. 3 is an illustration for illustrating the method
  • Fig. 4 is an illustration for illustrating the method with subsequent stacking
  • Fig. 5 is a detail of Fig. 4 for illustrating an overlap region
  • FIG. 1 an expanded honeycomb core 1 is shown.
  • the honeycomb core consists of individual strips 2, which consist of paper, plastic, aluminum or other sheet-like materials.
  • the strips are connected by alternately following double webs 4 and simple webs 3 with each other.
  • When pulling in the Expansion direction (arrow) forms a honeycomb-like structure, which is shown purely schematically in the drawing.
  • the achievement of a more or less pronounced hexagonal geometry depends on the stability and formability of the materials used and their preparation.
  • Fig. 2 shows a section of an expanded honeycomb core. Shown is a hexagonal honeycomb with adjacent honeycomb parts. The strips 2 extend substantially transversely to the direction of expansion (arrow direction).
  • the strip 2.3 lying approximately in the middle of the picture begins at the upper edge of the picture in the area of a double bridge. In the course of the lower edge of the picture, the strip 2.3 crosses the strip 2.4 on the right. The sides of the two strips 2.3 and 2.4 are adjacent to each other. For level crossing (crossing point 5.1) of strip 2.3 with the right-hand strip 2.4 the incision 5 shown is provided. Thereafter, the strip 2.3 goes over into a simple web 3.
  • the strip 2.3 and the right adjacent strip 2.6 intersect and form with this by overlapping a double web 4.
  • the said double web 4 extends to the intersection 5.3.
  • an incision 5 is again shown.
  • Such an incision 5 is located both in the strip 2.3 and in the strip 2.6, so that at the intersection 5.3 both strips can again be inserted at the same level and loosely into one another.
  • the strip 2.3 again forms a simple web, just as the strip 2.6 forms a simple web.
  • the strip 2.3 merges with the strip 2.4 at the crossing point 5.4 in the double edge of the picture at the bottom of the picture.
  • the cuts 5 in the strip are made regularly or according to a specific pattern, so that a honeycomb structure with alternating following double webs 4 and simple webs 3 results.
  • the connection of the strips takes place by nesting at the incisions and overlapping of the strips on the double webs 4 without the use of adhesive.
  • the areas indicated by 5a and 5b in Fig. 2 respectively show the cut surfaces of a strip which result at the transition from a double to a simple ridge at the intersection of two strips.
  • the sectional surface 5a the strips lying in the double ridge 4 right 2.2 and the cut surface 5b lying in the double ridge 4 left stripes.
  • Each of the vertices of a hexagonal honeycomb is at the same time an intersection with the above-described incisions 5.
  • An incision 5 made in the image plane from above into the strip 2, as shown in FIG. 2 corresponds in each case to an incision made in the strip from below (FIG. not shown in Fig. 2).
  • FIG. 3 The schematic representation in Fig. 3 serves to illustrate an advantageous variant of the manufacturing method according to the invention.
  • a material web 7 is unwound.
  • longitudinal cuts 8 are introduced by a cutting unit, not shown.
  • the longitudinal sections 8 are arranged along a line, as seen in the transport direction, with uncut areas following cut sections.
  • the arrangement of the longitudinal sections 8 along the material web 7 takes place according to a specific pattern. This pattern can be clarified by a division of the longitudinal sections 8 in columns and rows, wherein for simplicity, a pair of adjacent in the transport direction longitudinal sections 8 should be considered. In other words, two equally long side-by-side longitudinal sections form a pair.
  • the columns run in the transport direction of the material web 7.
  • the lines are transverse to the transport direction.
  • a pair of longitudinal sections 8 delimits a column.
  • the next pair of longitudinal sections 8 is arranged offset in the transport direction of the material web 7 by one line. Between two columns formed by pairs of longitudinal sections 8, an offset gap is provided, in which no longitudinal cuts are made.
  • the width of the longitudinal section pair column and the width of the offset column determines the geometry of the honeycomb core to be produced.
  • the line height is determined by the desired width of the strips 2.
  • the distance of the longitudinal sections of a pair ie the width of the longitudinal section pair column and the width of the offset column is chosen to be the same size in the embodiment, resulting in a geometry as in Fig. 1 and in Fig. 2.
  • strips 2 are separated from the web 7.
  • the guided transversely to the web 7 section thereby cuts through the longitudinal cuts 8 each centrally. This ensures that the strips 2 have cuts 5, which correspond to the successive and abutting strips.
  • a lying between the sipes 5 section 9 of a strip 2 forms in the subsequent honeycomb core 1 a double bridge 4.
  • the areas 10 left and right of these sections 9 form in the later honeycomb core simple webs.
  • the sections 9 between the incisions 5 are raised on the trailing edge 12 lying in the direction of transport.
  • the lying in the transport direction at a front edge 11 sections 9 between the sipes 5 are lowered.
  • the strips 2 can slide into each other at the incisions and form a loose composite by the already mentioned overlap in the region of the double webs.
  • Fig. 4 shows the formation of a stack 13 at the end of the web 2. In the finished stack 13, the edges of the strips are aligned.
  • the stack can be stored horizontally for storage and any subsequent processing.
  • the honeycomb core can be expanded. Thereafter, a shear-resistant connection with an upper and lower cover layer, so that a plate-shaped material is present, in which the expanded honeycomb core is joined even without adhesive.
  • FIG. 5 shows a section of the schematic representation of FIG. 4.
  • the detail represents a time in the process sequence in which the strips are provided with indentations 5 and are separated from the material web.
  • the individual strips are now joined by overlapping each other by overlapping in the area of the double webs and deposited on top of each other at the end of the process.
  • the portion 9 between the incisions 5 is raised on the leading strip and the portion 9 between the incisions 5 is lowered on the trailing strip.
  • the uncut part of the leading strip is inserted in the recess 5 of the trailing strip and vice versa.
  • the inventive method is not limited to the variant shown in the embodiment.
  • the feed of the web can also be realized by a stack with removable sheets, whereby the roller 6 can be replaced.
  • the web 7 can be fed as a narrow band, which is dimensioned in the width of the strips, and wherein the incisions are introduced by a laterally arranged cutting unit.
  • the merging of the strips into an expandable honeycomb core then takes place in the manner described in FIGS. 3 to 5.

Landscapes

  • Laminated Bodies (AREA)

Abstract

L'invention concerne une alvéole expansible, constituée de bandes individuelles (2) en papier, matière plastique, aluminium ou à base d'autres matériaux en forme de bande, qui sont reliées entre elles par des traverses doubles (4) et des traverses simples (3) qui se suivent alternativement, de sorte que, lors de l'extraction, il se forme une structure alvéolaire, caractérisée en ce qu'un modèle d'entailles (5) disposées transversalement à l'axe longitudinal des bandes (2) est prévu le long des bandes (2), les bandes (2) étant assemblées sur les entailles (5) de façon alternative avec une bande voisine gauche et une bande voisine droite par chevauchement dans la zone de chaque traverse double (4). Un procédé pour la fabrication d'une alvéole expansible est décrit. De la même façon, on décrit une structure sandwich pouvant être fabriquée au moyen de l'alvéole expansible, en forme de plaque ou formée en trois dimensions.
EP11708977.1A 2010-01-07 2011-01-07 Alvéole expansible, procédé pour sa fabrication continue et structure sandwich Not-in-force EP2531348B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102010004554 2010-01-07
PCT/DE2011/000026 WO2011082708A1 (fr) 2010-01-07 2011-01-07 Alvéole expansible, procédé pour sa fabrication continue et structure sandwich

Publications (2)

Publication Number Publication Date
EP2531348A1 true EP2531348A1 (fr) 2012-12-12
EP2531348B1 EP2531348B1 (fr) 2016-05-11

Family

ID=43971359

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11708977.1A Not-in-force EP2531348B1 (fr) 2010-01-07 2011-01-07 Alvéole expansible, procédé pour sa fabrication continue et structure sandwich

Country Status (3)

Country Link
EP (1) EP2531348B1 (fr)
DE (1) DE112011100204A5 (fr)
WO (1) WO2011082708A1 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103465516B (zh) * 2013-09-11 2016-06-08 青岛泰泓轨道装备有限公司 一种蜂窝三明治板蜂窝自动成型设备及其工艺
WO2016184528A1 (fr) * 2015-05-21 2016-11-24 Econcore N.V. Noyau en nid d'abeilles ayant structure cellulaire hiérarchique
CA3090953C (fr) * 2018-02-16 2021-06-29 Econcore N.V. Ame en nid-d'abeilles hierarchisee a parois d'alveoles en sandwich
DE102019112107A1 (de) * 2019-05-09 2020-11-12 Deutsches Zentrum für Luft- und Raumfahrt e.V. Verfahren zur Herstellung einer Rippenstruktur, Vorkörper, Rippenstruktur und Bauteil
EP3804976A1 (fr) 2019-10-08 2021-04-14 Nitto Belgium N.V Stratifié multicouches pour applications de protection thermique
DE102021109976A1 (de) 2021-04-20 2022-10-20 Mölle GmbH Vorrichtung zur Herstellung eines expandierbaren Wabenkernes
WO2024086865A1 (fr) * 2022-10-27 2024-05-02 Yona Pty Ltd Cadre de support modulaire

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB683096A (en) * 1950-05-04 1952-11-19 Maurice Kilemnik Improvements in or relating to locking means for strips in inter-engaged relation
US3218217A (en) * 1962-10-15 1965-11-16 Robert C Geschwender Apparatus for making cellular material
SU963885A1 (ru) * 1980-07-16 1982-10-07 Северный Филиал Всесоюзного Научно-Исследовательского Института По Строительству Магистральных Трубопроводов Способ изготовлени сотовой структуры
JPH0728631U (ja) * 1993-11-10 1995-05-30 三菱アルミニウム株式会社 ろう付ハニカムパネル
JP2000248848A (ja) * 1999-03-02 2000-09-12 Kariya Mokuzai Kogyo Kk フラッシュ構造体

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011082708A1 *

Also Published As

Publication number Publication date
WO2011082708A1 (fr) 2011-07-14
EP2531348B1 (fr) 2016-05-11
DE112011100204A5 (de) 2013-01-03

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