DE10241726B3 - Ventilated cusp plate as the core of a sandwich - Google Patents
Ventilated cusp plate as the core of a sandwich Download PDFInfo
- Publication number
- DE10241726B3 DE10241726B3 DE10241726A DE10241726A DE10241726B3 DE 10241726 B3 DE10241726 B3 DE 10241726B3 DE 10241726 A DE10241726 A DE 10241726A DE 10241726 A DE10241726 A DE 10241726A DE 10241726 B3 DE10241726 B3 DE 10241726B3
- Authority
- DE
- Germany
- Prior art keywords
- cusp
- ventilated
- core
- plate
- sandwich
- 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.)
- Expired - Fee Related
Links
- 238000003466 welding Methods 0.000 claims description 3
- 238000004026 adhesive bonding Methods 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- 238000005476 soldering Methods 0.000 claims description 2
- 230000002146 bilateral effect Effects 0.000 claims 1
- 238000009423 ventilation Methods 0.000 abstract description 10
- 239000011162 core material Substances 0.000 description 11
- 239000000463 material Substances 0.000 description 6
- 238000010276 construction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005304 joining Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 241000208202 Linaceae Species 0.000 description 1
- 235000004431 Linum usitatissimum Nutrition 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004049 embossing Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/26—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a particular shape of the outline of the cross-section of a continuous layer; characterised by a layer with cavities or internal voids ; characterised by an apertured layer
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B3/00—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form
- B32B3/10—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material
- B32B3/12—Layered products comprising a layer with external or internal discontinuities or unevennesses, or a layer of non-planar shape; Layered products comprising a layer having particular features of form characterised by a discontinuous layer, i.e. formed of separate pieces of material characterised by a layer of regularly- arranged cells, e.g. a honeycomb structure
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts
- E04C2/3405—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by profiled spacer sheets
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2250/00—Layers arrangement
- B32B2250/40—Symmetrical or sandwich layers, e.g. ABA, ABCBA, ABCCBA
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
- E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
- E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts
- E04C2/3405—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by profiled spacer sheets
- E04C2002/3411—Dimpled spacer sheets
- E04C2002/3422—Dimpled spacer sheets with polygonal dimples
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Offenbart ist eine belüftete Höckerplatte als Kern eines Sandwichs, die aus zwei gleichartig hergestellten Formbauteilen besteht, die ineinanderliegend flächig in Kontakt liegen und deren vom Deckblech eingeschlossenen Höckerhohlräume durch Belüftungsöffnungen miteinander verbunden werden. DOLLAR A Durch die besondere Bauart der belüfteten Höckerplatte kann das Beulen der angesetzten Deckplatten infolge Druckschwankungen vermieden und die Steifigkeit erhöht werden.What is disclosed is a ventilated cusp plate as the core of a sandwich, which consists of two molded components of the same type, which lie flatly in contact with one another and whose cusp cavities enclosed by the cover plate are connected to one another by ventilation openings. DOLLAR A The special design of the vented cusp plate prevents the attached cover plates from buckling due to pressure fluctuations and increases the rigidity.
Description
Sandwichplatten weisen ein Höchstmaß an Steifigkeit auf. Sie werden aus Deckplatten hergestellt, die über einen Kern möglichst schubsteif miteinander verbunden werden. Als Kernmaterial wird häufig Kunststoff oder die bekannte Honeycomb- Wabe verwendet, die meist aus Aluminium besteht.Sandwich panels are extremely rigid on. They are made from cover plates that have a Core if possible shear resistant connected. Plastic is often used as the core material or the well-known honeycomb honeycomb, which is mostly made of aluminum consists.
Weitere Baustrukturen, die als Sandwichkern
oder auch alleinig eingesetzt werden, sind aus
Ebenso sind Bauarten aus
Einem anderen Prinzip folgend sind
Möglichkeiten
bekannt, die durch Verwendung zweier gleich hergestellter Formbauteile
ein Gesamtbauteil durch Fügen
an den Kontaktflächen
der gegeneinander gesetzten Formteile bilden. Diese Bauteile weisen
einen hohen Flächenanteil
in den Kontakt- bzw. Verbindungsstellen auf und besitzen außerdem durch
die auf beiden Außenflächen befindlichen
ebenen Gurte eine stabtragswerksähnliche
Wirkung mit einer hohen Biegesteifigkeit. Hier sind Bauarten aus
Alle diese Bauarten mit eben, durchgehenden Gurtflächen haben aber einen gravierenden Nachteil: Wird aus derart aufgebauten Kernen ein Sandwich durch Aufbringen von Deckblechen hergestellt, bilden sich abgeschlossene Hohlräume. Luftdruckunterschiede z.B. bei der Verbindung der Deckplatten mit der Kernkonstruktion im Vakuumofen oder bei nachträglicher Erwärmung des Sandwichbauteils, führen zum Beulen des Deckbleches in diesen abgeschlossenen Hohlraumbereichen, was die Tragfähigkeit herabsetzt sowie den ästhetischen Ansprüchen nach einem glatt bleibenden Deckblech nicht genügt.All these types with flat, continuous belt surfaces but have a serious disadvantage: is made from such a structure Cores a sandwich made by applying cover sheets, closed cavities are formed. Air pressure differences e.g. when connecting the cover plates with the core construction in the vacuum furnace or afterwards warming of the sandwich component for buckling the cover plate in these closed cavity areas, what the load capacity degrades as well as the aesthetic Claims according to a cover sheet that remains smooth is not sufficient.
Dieses Problem wird durch die im
Patentanspruch 1 angegebenen Merkmale gelöst:
Werden an speziellen
Stellen Belüftungsöffnungen durch
tiefer geprägte
Basisflächen
in das Formbauteil eingebracht, kann die Tragwirkung weitestgehend beibehalten
werden aber gleichzeitig ein Druckausgleich in den vom Deckblech
geschaffenen Hohlräumen
erreicht werden. Dies wird konstruktiv durch gezielte geometrische
Formvorgabe der Höcker
durch deren Abstände
und Neigungswinkel erzeugt, so dass die Höcker ineinander greifen und
dort unter dem Deckblech ein Durchgang geschaffen wird. Die vorher
eben verlaufenden Gurte in den Basisflächen der Kernkonstruktion werden
an diesen Stellen aus der Basisfläche heraus geformt. Eine wirkmedienunterstützte Umformmöglichkeit
bleibt damit erhalten. Diese Belüftungsöffnungen
können
auch nachträglich
unabhängig
von der Höckerform
an speziellen Stellen eingebracht werden. Dabei muss jedoch in allen
Fällen
darauf geachtet werden, dass die Passgenauigkeit der zwei gleichartig
hergestellten Formbauteile erhalten bleibt, um sie nach Drehung
um 180° um
die Horizontale und Versatz passgenau an den vorgegeben Kontaktflächen ineinander
setzen zu können.
Der flächige
Kontakt der untereinander anliegenden Seitenflächen der gegeneinander liegenden
Höcker
beider Formbauteile oder ein evtl. gewünschter zusätzlicher flächiger Kontakt in den Tiefpunkten
der Höcker
mit der Basisfläche
des Gegenformbauteils muss erhal ten bleiben, um nach Fügen eine
hohe Steifigkeit der Kernkonstruktion zu gewährleisten. Die gebildeten Entlüftungsöffnungen durch
die abschnittsweise tiefer geprägte
Basisfläche darf
die eben verlaufenden Gurtflächen
nur geringfügig
tiefer ausformen, um den Vorteil der großen Kontaktflächen zur
Anbindung eines Deckbleches nicht zu beeinflussen. Sonst wäre das Deckblech
durch die fehlende Unterstützung
durch die Kernkonstruktion hier nicht mehr ausreichend gegen Knicken
geschützt.This problem is solved by the features specified in claim 1:
If ventilation openings are introduced into the molded component through deeper embossed base areas at special points, the load-bearing capacity can be largely retained, but at the same time pressure equalization can be achieved in the cavities created by the cover plate. This is constructively generated by the specific geometric shape of the humps by their spacing and inclination angle, so that the humps interlock and a passage is created under the cover plate. The belts that previously run flat in the base surfaces of the core construction are formed at these locations from the base surface. An active media-supported forming option is thus retained. These ventilation openings can also be retrofitted at special points regardless of the shape of the hump. In all cases, however, care must be taken to ensure that the fitting accuracy of the two molded components manufactured in the same way is retained so that they can be fitted into one another at the specified contact surfaces after rotation by 180 ° around the horizontal and offset. The flat contact of the mutually adjacent side surfaces of the opposing cusps of both molded components or a possibly desired additional flat contact in the low points of the cusps with the base surface of the counter-molded component must be maintained in order to ensure a high rigidity of the core construction after joining. The ventilation openings formed by the base surface, which is embossed deeper in sections, may only form the belt surfaces running just a little deeper so as not to influence the advantage of the large contact surfaces for connecting a cover plate. Otherwise the cover plate would no longer be adequately protected against kinking due to the lack of support from the core construction.
Mit dieser Ausführungsform ist es nun auch möglich, sehr dünne Deckbleche zu verwenden. Effekte aus Temperaturschwankungen, die eine Ausdehnung der eingeschlossenen Luft in den Hohlkammern zur Folge haben und damit die ebene Deckblechstruktur beeinträchtigen, werden durch diese Ausführungsform verhindert. Die durch die Deckplatten gebildeten Höckerhohlräume kommunizieren miteinander und können von den Rändern des Sandwichs her belüftet werden. Dies gewährleistet eine immer gleich bleibende Steifigkeit, was z.B. für die Luft- und Raumfahrt eine hohe Bedeutung hat.With this embodiment it is now also possible to use very thin cover plates. Effects from temperature fluctuations, which result in an expansion of the enclosed air in the hollow chambers and thus impair the flat cover plate structure, are caused by them Embodiment prevented. The bump cavities formed by the cover plates communicate with one another and can be ventilated from the edges of the sandwich. This ensures a constant rigidity, which is of great importance, for example, for the aerospace industry.
Durch den bevorzugten Herstellprozess dieser Höckerplatte durch die Ausprägung der Höcker in Matrizenwerkzeugen z.B. durch die Techniken des Tiefziehens oder des Hydroformens mittels Wasserdruck, können immer auch unterschiedliche Blechdicken passgenau ineinander gesetzt werden, da die räumlich verlaufende Trennfläche immer exakt in der Kontaktfläche der aneinander liegenden Höckerseitenflächen der beiden Formbauteile sowie zwischen der abgeflachten Höckerspitze des einen Formbauteils und der Basisfläche des anderen Formbauteils liegt. Auch der umgekehrte Herstellungsprozess des Tiefziehens in eine Positivform ist denkbar. Nur muss dann die Geometrie der Höcker an die Wandstärke und das Umformverhalten des verwendeten Materials angepasst werden.Through the preferred manufacturing process this bump plate by the expression the hump in die tools e.g. through the techniques of deep drawing or of hydroforming using water pressure can always be different Sheet thicknesses can be put into each other precisely, because the spatially extending interface always exactly in the contact area of the abutting cusp side surfaces of the two molded components and between the flattened cusp tip of one molded component and the base surface of the other molded component. Also the reverse manufacturing process of deep drawing into one Positive form is conceivable. Only then does the geometry of the humps have to the wall thickness and the forming behavior of the material used can be adjusted.
Die Neigung der Höckerseitenflächen, sowie die Größe der Kontaktflächen und die Größe der außen liegenden Basisflächen lässt sich unter Einhaltung der geometrischen Grundbedingungen an die Passgenauigkeit einstellen. Damit kann die Höckerform auf das Umformverhalten des verwendeten Materials angepasst werden und für das verwendete Fügemittel optimal angepasste Kontaktflächen bereitgestellt werden. Die Fügung der beiden Formbauteile, kann durch die Standardverfahren des Schweißens (auch direktes Heißschweißen bei Kunststoff ohne zusätzlichen Kleber), des Klebens, Lötens, Nieten oder Siegelns erfolgen.The slope of the cusp side surfaces, as well as the Size of contact areas and the size of the outside base surfaces let yourself in compliance with the basic geometric conditions for the accuracy of fit to adjust. So that the hump shape be adapted to the forming behavior of the material used and for the joining agent used optimally adapted contact surfaces to be provided. The coincidence of the two mold parts, can be done through the standard welding process (too direct hot welding at Plastic without additional Glue), gluing, soldering, Riveting or sealing.
Als Materialien für das Formbauteil sind alle Materialien wie z.B. Metalle, Kunststoffe oder auch Papiere, Flachsfasern u.ä. möglich. Selbst glas- oder kohlefaserverstärkte Materialien sind denkbar.All materials are used as materials for the molded component such as. Metals, plastics or also papers, flax fibers etc. possible. Self glass or carbon fiber reinforced Materials are conceivable.
Die belüftete Höckerplatte ist optimal als Kern eines Sandwichs geeignet, weil sie eine extrem steife Verbindung der Deckbleche erzeugt, da beide Formbauteile sich durch die ihre gegenseitige Fügung versteifen und eine hohe Kontaktfläche für die Anbindung der Deckbleche bereithalten. Durch die Verwendung der zwei ineinandergesetzten Formbauteile für den Kern eines Sandwichs können die Höcker sehr eng aneinander gesetzt werden, was eine kontinuierliche und homogene Deckblechanbindung erzeugt. Im Grenzfall von quasi dreieckigen Höckerstrukturen liegen die gebildeten Höcker so dicht aneinander, wie es enger nicht mehr geht. Es entsteht eine das Deckblech unterstützende Struktur, die an die bekannte Honeycomb – Wabe erinnert, nur dass diese auf eine völlig andere Art erzeugt wurde und die vom Deckblech gebildeten Hohlräume zum Druckausgleich belüftet werden können.The ventilated cusp plate is optimal as a core of a sandwich because it is an extremely rigid connection of the cover plates, since both molded components are characterized by theirs mutual coincidence stiffen and a high contact area for the connection of the cover plates ready. By using the two nested Molded parts for the core of a sandwich the humps be very closely related to what is a continuous and homogeneous cover plate connection created. In the borderline case of quasi triangular cusp structures lie the formed humps as close to each other as it couldn't be any closer. There is one supporting the cover plate Structure reminiscent of the well known Honeycomb honeycomb, only that on a completely another type was generated and the cavities formed by the cover plate for pressure equalization ventilated can be.
Die vorliegende Erfindung wird nachstehend mit Bezug auf die Zeichnungsfiguren näher erläutert, die folgendes zeigen:The present invention is described below With reference to the drawing figures, which show the following:
Erläuterung der markierten Stellen:
(1 ): oberes Formbauteil mit nach unten ausgeprägten Sechseckhöckern (dicke
Linien); (2): Basisfläche
des oberen Formbauteils (einfach schraffiert), die mit der Höckerspitze
des unteren Formbauteils im kreuzschraffierten Bereich in Kontakt
liegt; (3): nach unten ausgeprägte
Höckerspitze
des oberen Formbauteils (Kontaktfläche mit unterer Basisfläche)(kreuzschraffiert);
(4): Kontaktflächen
der Seitenwände
der Höcker
beider Formbauteile; (5): Überschneidung
der Höckerecken
des oberen Formbauteil mit Bildung der Belüftungsöffnung durch die etwas tiefer
geprägte Basisfläche des
oberen Formbauteils; (6): gebildete Dreiecksfläche des oberen Formbauteils
(
Claims (8)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10241726A DE10241726B3 (en) | 2002-09-10 | 2002-09-10 | Ventilated cusp plate as the core of a sandwich |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10241726A DE10241726B3 (en) | 2002-09-10 | 2002-09-10 | Ventilated cusp plate as the core of a sandwich |
Publications (1)
Publication Number | Publication Date |
---|---|
DE10241726B3 true DE10241726B3 (en) | 2004-01-08 |
Family
ID=29719543
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE10241726A Expired - Fee Related DE10241726B3 (en) | 2002-09-10 | 2002-09-10 | Ventilated cusp plate as the core of a sandwich |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE10241726B3 (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006031696A1 (en) * | 2006-07-08 | 2008-01-10 | Bohmann, Dirk, Dr.-Ing. | Spacer used in hump plates for adjusting the adhesive thickness comprises point-like or linear humps inserted into outer surfaces in a first molded component |
DE102006055657A1 (en) * | 2006-11-23 | 2008-05-29 | Behrens, Arno, W. Dr.-Ing. | Component of a flat material and method for its production |
DE102009056969A1 (en) * | 2009-12-07 | 2011-06-09 | Claas Selbstfahrende Erntemaschinen Gmbh | Flat body element in sandwich construction |
DE102010030233A1 (en) | 2010-06-17 | 2011-12-22 | Evonik Degussa Gmbh | Semi-finished product for the production of fiber composite components based on storage-stable polyurethane compositions |
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US2809908A (en) * | 1953-12-28 | 1957-10-15 | Keyes Fibre Co | Construction panel |
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US3561177A (en) * | 1968-07-16 | 1971-02-09 | Charles A Cassaro | Building component |
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US3914486A (en) * | 1973-03-27 | 1975-10-21 | Skapti Josef Borgford | Shear form structures |
DE3206163A1 (en) * | 1982-02-20 | 1983-09-01 | Helmut 7812 Bad Krozingen Keck | Building element |
US4495237A (en) * | 1983-06-10 | 1985-01-22 | Patterson Fred R | Pyramidal core structure |
DE3900166A1 (en) * | 1989-01-05 | 1990-07-26 | Robertson Nederland | Hollow panels |
US5040966A (en) * | 1988-11-02 | 1991-08-20 | Tetrahex, Inc. | Die for making a tetrahexagonal truss structure |
WO2000073602A1 (en) * | 1999-05-27 | 2000-12-07 | Kueppers Peter | Lightweight construction element in the form of a hollow body contoured honeycomb structure |
DE19944662A1 (en) * | 1999-09-17 | 2001-06-07 | Dirk Bohmann | Three-dimensional support structure with flat, shaped parts comprises equal first and second flat parts with humps formed from polygons. |
-
2002
- 2002-09-10 DE DE10241726A patent/DE10241726B3/en not_active Expired - Fee Related
Patent Citations (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US956132A (en) * | 1909-10-02 | 1910-04-26 | William L Morford | Cultivator. |
US1875188A (en) * | 1932-01-27 | 1932-08-30 | Sherman Products Corp | Unit formed of sheet material |
US2481046A (en) * | 1947-11-13 | 1949-09-06 | Western Engineering Associates | Panel structure |
US2809908A (en) * | 1953-12-28 | 1957-10-15 | Keyes Fibre Co | Construction panel |
DE1659119A1 (en) * | 1967-03-09 | 1970-12-23 | Hale Jesse Raymond | Cell-like core material |
US3561177A (en) * | 1968-07-16 | 1971-02-09 | Charles A Cassaro | Building component |
US3842768A (en) * | 1971-03-18 | 1974-10-22 | M Maistre | Cellular flotation structure |
US3914486A (en) * | 1973-03-27 | 1975-10-21 | Skapti Josef Borgford | Shear form structures |
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US5040966A (en) * | 1988-11-02 | 1991-08-20 | Tetrahex, Inc. | Die for making a tetrahexagonal truss structure |
DE3900166A1 (en) * | 1989-01-05 | 1990-07-26 | Robertson Nederland | Hollow panels |
WO2000073602A1 (en) * | 1999-05-27 | 2000-12-07 | Kueppers Peter | Lightweight construction element in the form of a hollow body contoured honeycomb structure |
DE19944662A1 (en) * | 1999-09-17 | 2001-06-07 | Dirk Bohmann | Three-dimensional support structure with flat, shaped parts comprises equal first and second flat parts with humps formed from polygons. |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006031696A1 (en) * | 2006-07-08 | 2008-01-10 | Bohmann, Dirk, Dr.-Ing. | Spacer used in hump plates for adjusting the adhesive thickness comprises point-like or linear humps inserted into outer surfaces in a first molded component |
DE102006031696B4 (en) * | 2006-07-08 | 2008-04-30 | Bohmann, Dirk, Dr.-Ing. | Spacers in bump plates for setting the adhesive thickness |
DE102006055657A1 (en) * | 2006-11-23 | 2008-05-29 | Behrens, Arno, W. Dr.-Ing. | Component of a flat material and method for its production |
DE102009056969A1 (en) * | 2009-12-07 | 2011-06-09 | Claas Selbstfahrende Erntemaschinen Gmbh | Flat body element in sandwich construction |
DE102009056969A8 (en) * | 2009-12-07 | 2011-11-10 | Claas Selbstfahrende Erntemaschinen Gmbh | Flat body element in sandwich construction |
DE102010030233A1 (en) | 2010-06-17 | 2011-12-22 | Evonik Degussa Gmbh | Semi-finished product for the production of fiber composite components based on storage-stable polyurethane compositions |
WO2011157507A1 (en) | 2010-06-17 | 2011-12-22 | Evonik Degussa Gmbh | Semifinished product for the production of fibre composite components based on stable polyurethane compositions |
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