EP2991822A1 - Verfahren zur herstellung von formbaren wabenkernen - Google Patents
Verfahren zur herstellung von formbaren wabenkernenInfo
- Publication number
- EP2991822A1 EP2991822A1 EP14731138.5A EP14731138A EP2991822A1 EP 2991822 A1 EP2991822 A1 EP 2991822A1 EP 14731138 A EP14731138 A EP 14731138A EP 2991822 A1 EP2991822 A1 EP 2991822A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- honeycomb
- folding
- expansion
- folded
- vertical surfaces
- 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
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
Definitions
- the invention relates to a method for the production of moldable honeycomb cores according to the preamble of claim 1.
- Plate-shaped sandwich composites usually consist of two cover layers, which are shear-resistant connected with a light core layer. Based on this structure, advantageous mechanical properties of the composite result with comparably low weight.
- Cores for sandwich composites especially cores having a void structure (e.g., honeycomb structure) typically have a significantly lower density than the liners.
- a void structure e.g., honeycomb structure
- a variant of a core with a cavity structure are hexagonal honeycomb cores.
- hexagonal honeycomb cores are produced as unexpanded paper honeycomb cores for the field of furniture and interior design as well as for related areas and are only expanded immediately prior to the production of the sandwich panels, which entails the advantage of a very low transport volume.
- sandwich panels with such cores enable high specific compressive strengths across the board plane, an enormous weight saving and a reduced consumption of raw materials.
- Conventional hexagonal honeycomb cores consist of a honeycomb-like, hexagonal structure, which is formed by the gluing of paper strips k of defined thickness s and subsequent expansion, expansion.
- the direction of production X is the direction in which it is expanded.
- a three-dimensional view of a section is shown in Figure 2 and a single cut-out cell as a plan view in Fig. 3.
- honeycomb cores There are already different three-dimensionally formable honeycomb cores. Such a honeycomb core is known, for example, from EP 0 955 109 A2. Such structures are complex in their production and also do not offer the possibility of transport to the final processor in the unexpanded state. Thus, such three-dimensionally deformable cores are expensive and are used only for a few applications. They consist of e.g. made of aramid fiber paper, which is impregnated with resin after its transformation, or of aluminum.
- the document DE 10 2009 005 869 A1 describes an expandable honeycomb core which can be shaped in the transverse and longitudinal directions without damage to the structure and thus enables a three-dimensional shaping of sandwich components without impairment of the honeycomb core (3-d expansion honeycomb).
- a three-dimensional view of a section is shown in Figure 4 and a single cut-out cell as a plan view in Fig. 5.
- the 3-d expansion honeycomb consists of individual web layers / folded paper strips of thickness s, which are connected to one another by alternately following double webs b1 and simple webs b2, so that upon expansion a honeycomb-like structure is formed. The connection is made by the strip sections are glued together in the region of the double webs.
- the simple webs b2 of the 3-d expansion honeycomb additionally have predetermined bending lines which connect the simple webs into three regions b2.1, b2.2, share b2.3.
- This structure allows the defined folding of the honeycomb core formed in the transverse and / or longitudinal direction and at the same time increases the compressive strength of the sandwich composite.
- other raw materials such as aramid fiber paper with subsequent impregnation of resin or aluminum can be used.
- the 3-d expansion honeycomb can be manufactured in any desired core heights h.
- honeycomb cores Components with conventional honeycomb cores have significantly reduced strength values due to the buckling or tearing of webs in the case of two- or three-dimensional deformation. Therefore, such honeycomb cores are rarely used for two-dimensionally or three-dimensionally shaped components.
- a variant of the application is the use of petroleum-based foams (e.g., polyurethane foams) as the core layer of three-dimensional sandwich panels, which are currently in use. is also combined with the use of conventional honeycomb cores.
- foams e.g., polyurethane foams
- Sandwich composites of the type discussed here can be implemented as a one-dimensional plate as well as a two-dimensional or three-dimensionally shaped component.
- two- and three-dimensionally shaped components are increasingly used in industries such as aircraft, automotive, caravan construction, shipbuilding and boatbuilding, but also in furniture and exhibition construction and in immobile interior design.
- the cover layers usually consist of correspondingly deformable materials such as plastic, metal, wood and wood-based material or (natural) fibers.
- the object of the present invention is to provide an industrially applicable method for producing the 3-d expansion honeycomb with improved technology.
- Fig. 2 is a three-dimensional view of a section of a conventional
- Fig. 3 is a plan view of a cell of a conventional hexagonal honeycomb core
- Fig. 4 is a three-dimensional view of a portion of the 3-d expansion honeycomb
- Fig. 5 is a plan view of a cell of the 3-d expansion honeycomb
- Fig. 7 is a three-dimensional view of a section of the second
- Umformvorganges which the meandering form in a folded sheet or a
- Folding sheet or the folding sheet is cut in alternately from above and below and then converted to 3-d expansion honeycomb,
- FIG. 11 shows a three-dimensional view of a possible further processing in which the folded sheet or the fold sheet is divided into sections, which in turn are correspondingly provided with adhesive and form the 3-d expansion honeycomb arranged correspondingly,
- Figure 13 is a three-dimensional view of a possible further processing in which the folded sheet or the fold sheet, many are joined together by means of adhesive into a block, from which the 3D expansion honeycomb is separated at the desired core height.
- FIG. 1 A basic process sequence of the method according to the invention is shown in FIG.
- a flat, bow-shaped or web-shaped processing material is conveyed into or through a die.
- the resulting shape consists of alternating vertically and horizontally contiguous surfaces. Transverse to the machine direction Y thus forms a meandering, in the example of Fig. 6 a Zinnenfries form.
- the result of this first parting process can also be a cross section that is slightly different from the Zinnenfries form.
- the deflections between vertical 5 and horizontal surfaces 4 can also be performed with a larger radius. In extreme cases, until the complete curvature of the horizontal surfaces, Fig. 9.
- the existing meandering shape is further formed by L Lucassfalzen to the folded sheet or Falzbahn.
- special tools mold rails are necessary, which bring in all the required fold lines during conveying of the processing material by a multiple, parallel Leksfalzen.
- Fig.7 When forming the horizontal surfaces 4, Fig.7, to a part of the previously vertical Areas 5a expanded. The remaining area is formed in a zigzag pattern 5b, c, d.
- FIG. 7 shows a section of the material to be processed during forming. It is not absolutely necessary for the bending lines to be introduced with sharp-edged tools.
- the tools may, for example, also be designed so that the edges required for the forming are designed with a radius 5r decreasing along the tool.
- FIG. 1 A side view of this process is shown in FIG. It is the folded material to be processed in the area of the later double webs first adhesive on one side. This is done between section 1.2 and 1.3. Next, the folding pattern is cut to the last layer of the processed material and hinged around 180 °. The previously applied adhesive layer on the double webs causes the material connection of the individual hitherto only hinge-like sections to the 3-d expansion honeycomb.
- the presented method for producing the 3d expansion honeycomb can work continuously or discontinuously.
- sheets or webs can be processed.
Landscapes
- Laminated Bodies (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013008026.6A DE102013008026A1 (de) | 2013-05-03 | 2013-05-03 | Verfahren zur Herstellung von formbaren Wabenkernen |
PCT/DE2014/000226 WO2014177132A1 (de) | 2013-05-03 | 2014-04-30 | Verfahren zur herstellung von formbaren wabenkernen |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2991822A1 true EP2991822A1 (de) | 2016-03-09 |
EP2991822B1 EP2991822B1 (de) | 2017-07-12 |
Family
ID=50976429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14731138.5A Not-in-force EP2991822B1 (de) | 2013-05-03 | 2014-04-30 | Verfahren zur herstellung von formbaren wabenkernen |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2991822B1 (de) |
DE (1) | DE102013008026A1 (de) |
WO (1) | WO2014177132A1 (de) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8539737B2 (en) | 2008-09-19 | 2013-09-24 | Ford Global Technologies, Llc | Twelve-cornered strengthening member |
US10393315B2 (en) | 2016-04-26 | 2019-08-27 | Ford Global Technologies, Llc | Cellular structures with twelve-cornered cells |
US10704638B2 (en) | 2016-04-26 | 2020-07-07 | Ford Global Technologies, Llc | Cellular structures with twelve-cornered cells |
US10279842B2 (en) | 2016-08-30 | 2019-05-07 | Ford Global Technologies, Llc | Twenty-eight-cornered strengthening member for vehicles |
US10429006B2 (en) * | 2016-10-12 | 2019-10-01 | Ford Global Technologies, Llc | Cellular structures with twelve-cornered cells |
DE102019113067B3 (de) | 2019-05-17 | 2020-10-22 | Technische Universität Dresden | Verfahren zur Herstellung eines flexibel formbaren Wabenkerns, Verwendung des Wabenkerns sowie Vorrichtung zur Durchführung des Verfahrens |
US11292522B2 (en) | 2019-12-04 | 2022-04-05 | Ford Global Technologies, Llc | Splayed front horns for vehicle frames |
USD971019S1 (en) | 2020-07-29 | 2022-11-29 | 3M Innovative Properties Company | Extended sheet |
USD946907S1 (en) | 2020-07-29 | 2022-03-29 | 3M Innovative Properties Company | Sheet with slits |
USD1004290S1 (en) | 2020-07-29 | 2023-11-14 | 3M Innovative Properties Company | Sheet with slits |
USD1016497S1 (en) | 2020-07-29 | 2024-03-05 | 3M Innovative Properties Company | Expanded sheet |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE133165C (de) | ||||
NL102542C (de) * | 1958-02-25 | 1900-01-01 | ||
US3218217A (en) * | 1962-10-15 | 1965-11-16 | Robert C Geschwender | Apparatus for making cellular material |
GB1390968A (en) * | 1971-07-28 | 1975-04-16 | Nissan Motor | Honeycomb structures |
US4428993A (en) * | 1982-05-11 | 1984-01-31 | Baltek Corporation | Structural laminate with expanded wood core |
US5064493A (en) * | 1990-10-09 | 1991-11-12 | Lansing Overhaul And Repair, Inc. | Method of producing curved honeycomb core material having crimps in one edge |
CA2057152A1 (en) * | 1990-12-18 | 1992-06-19 | Roman Traber | Method and device for corrugated deformation of a flat material sheet as well as a packaging component produced according to this method |
DE9215985U1 (de) * | 1992-11-20 | 1994-03-24 | Edm. Romberg & Sohn (GmbH & Co) KG, 25479 Ellerau | Mehrschichtiger Wellpappekörper |
US5431980A (en) * | 1993-02-01 | 1995-07-11 | Mccarthy; Daniel J. | Formable cellular material with synclastic behavior |
US6003283A (en) | 1998-05-07 | 1999-12-21 | Hexcel Corporation | Vented flexible honeycomb |
CA2248525A1 (en) * | 1998-09-30 | 2000-03-30 | Chih-Shiu Hung | Method for making pads having honeycomb structure |
DE102009005869A1 (de) | 2009-01-15 | 2010-07-22 | Technische Universität Dresden | Expandierbarer Wabenkern und Verfahren zur Herstellung |
US8303744B2 (en) * | 2011-02-10 | 2012-11-06 | Bradford Company | Method of making multilayer product having honeycomb core |
-
2013
- 2013-05-03 DE DE102013008026.6A patent/DE102013008026A1/de not_active Withdrawn
-
2014
- 2014-04-30 WO PCT/DE2014/000226 patent/WO2014177132A1/de active Application Filing
- 2014-04-30 EP EP14731138.5A patent/EP2991822B1/de not_active Not-in-force
Non-Patent Citations (1)
Title |
---|
See references of WO2014177132A1 * |
Also Published As
Publication number | Publication date |
---|---|
EP2991822B1 (de) | 2017-07-12 |
WO2014177132A1 (de) | 2014-11-06 |
DE102013008026A1 (de) | 2014-11-06 |
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