EP2718203B1 - Freight floor, freight container, method for producing a freight floor - Google Patents

Freight floor, freight container, method for producing a freight floor Download PDF

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Publication number
EP2718203B1
EP2718203B1 EP12726115.4A EP12726115A EP2718203B1 EP 2718203 B1 EP2718203 B1 EP 2718203B1 EP 12726115 A EP12726115 A EP 12726115A EP 2718203 B1 EP2718203 B1 EP 2718203B1
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EP
European Patent Office
Prior art keywords
layer
core
freight
freight floor
core layer
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.)
Not-in-force
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EP12726115.4A
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German (de)
French (fr)
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EP2718203A1 (en
Inventor
Thomas Huber
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Telair International GmbH
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Telair International GmbH
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Publication of EP2718203A1 publication Critical patent/EP2718203A1/en
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D88/00—Large containers
    • B65D88/02—Large containers rigid
    • B65D88/12—Large containers rigid specially adapted for transport
    • B65D88/14—Large containers rigid specially adapted for transport by air
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/022—Laminated structures
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/249921—Web or sheet containing structurally defined element or component
    • Y10T428/249924—Noninterengaged fiber-containing paper-free web or sheet which is not of specified porosity
    • Y10T428/24994—Fiber embedded in or on the surface of a polymeric matrix
    • Y10T428/24995—Two or more layers
    • Y10T428/249951—Including a free metal or alloy constituent

Definitions

  • the present invention relates to a cargo floor, a freight container and a method for producing a cargo floor.
  • Freight containers and cargo pallets are indispensable for the effective transport of cargo in aircraft, as they allow a fast loading and unloading of the aircraft.
  • the vast majority of commercial aircraft can accommodate a variety of freight containers or cargo pallets.
  • Most containers or pallets are standardized so that they can be used independently of the aircraft used for transport.
  • freight containers were made exclusively of aluminum, with the weight of the container was about 100 kg.
  • the currently used containers are partly based on lighter materials, so that freight containers weighing around 60 kg are now being used. It should be obvious that reducing the dead weight of the containers or pallets used has a significant financial and environmental impact.
  • Freight containers are for example from the EP10520745A1 , of the DE102007035228A1 , of the WO00 / 21861A2 , of the DE 69 702 821 T2 , of the US 5,941,405 , of the DE 20 64 241 and the DE 102 008 005 010 A1 known.
  • this object is achieved by a cargo floor with at least one core layer of carbon-reinforced and / or glass-fiber reinforced and / or aramid fiber reinforced plastic and a support layer of a metal alloy, in particular an aluminum alloy, which is a composite material.
  • An essential idea of the present invention is to reduce the weight of the cargo floor by producing it from several layers, in particular in a sandwich construction, whereby materials of metal and of plastic are used for the layers.
  • materials of metal and of plastic are used for the layers.
  • the layers are joined by material and / or form-fitting, wherein a material bond leads to particularly good results.
  • the cargo floor comprises a large number of core layers. These core layers form a core.
  • the core layers are fiber reinforced, wherein a first core layer may have a first fiber orientation that is different from a second fiber orientation of a second core layer.
  • two core layers may be arranged such that the first fiber orientation differs from the second fiber orientation by an absolute angle of at least 20 or 30 or 40 or 45 degrees or 90 degrees.
  • the absolute angle may be defined to be the smallest absolute angle value between two fiber orientations.
  • At least one core layer comprises a fiber network of carbon fibers and / or glass fibers and / or aramid fibers.
  • the fibers within a fiber network may be substantially perpendicular to each other so that a mesh results.
  • a corresponding core layer is particularly durable.
  • the core layers with fiber nets can also be arranged such that the fiber orientations of two core layers differ by 20 or 30 or 40 or 45 degrees or 90 degrees. This angle specification can also be understood as an absolute angle.
  • the cargo floor comprises at least one core layer with a foam layer.
  • a foam with cellular structure and low density can be used.
  • the foam is at least partially impregnated with synthetic resin.
  • the foam causes the cargo space floor according to the invention has a low weight, wherein the synthetic resin stiffens the construction.
  • the foam layer comprises a support structure.
  • this support structure extends vertically to the cargo compartment floor, so that it connects to the foam layer adhering layers firmly together.
  • the support structure is formed of a synthetic resin.
  • the support structure can be a have rectangular or honeycomb or round shape to accommodate vertical forces.
  • the foam layer may be formed between a first core layer of carbon fiber reinforced and / or glass fiber reinforced and / or aramid fiber reinforced plastic and a second core layer embedded carbon fiber reinforced and / or glass fiber reinforced and / or aramid fiber reinforced plastic.
  • the individual layers are interconnected by material bond.
  • a compound of the layers can be made by synthetic resin.
  • the foam layer has the support structure already described, which extends substantially perpendicular to the fiber direction or the fiber directions of the first and second core layer.
  • At least one core layer may have a connection layer on a side facing the support layer.
  • This tie layer may serve to bond the corresponding core layer or core to the overlay layer.
  • the tie layer may be made of an elastomer.
  • this connection layer serves firstly to connect the support layer to the core or the core layers.
  • the tie layer compensates for a differential thermal expansion between the core having the at least one core layer and the overlay layer. This can be advantageous if the cargo space floor according to the invention is produced, or if it is exposed to strong temperature fluctuations during its use.
  • an adhesive in particular a polyurethane adhesive, can be used to bond the support layer to the core layer.
  • the bonding layer can be bonded to the core layer and / or the overlay by adhesion, in particular by vulcanization.
  • the overlay layer of the metal alloy serves as the outer layer against which the cargo drive units engage. Furthermore, this layer absorbs punctual loads and distributes them over a wide area.
  • An aluminum alloy is particularly suitable here, since a good coefficient of friction results in connection with conventional rollers of cargo drive units.
  • the core layers stiffen the entire construction and lead to significant weight savings.
  • the support layer may have a thickness of 0.5 mm to 2.5 mm, in particular from 0.7 mm to 1.5 mm, in particular from 0.9 mm to 1.5 mm.
  • the support layer has only a small thickness, eg less than 40%, in particular less than 30%, in relation to the thickness of the entire cargo floor. in particular less than 20% of the total thickness. In this respect, significantly lighter cargo floors can be produced.
  • the support layer may have a strength of more than 400 N / mm 2 , in particular more than 500 N / mm 2 .
  • the overlay layer can protect the core layer from high punctual loads.
  • the cargo floor according to the invention is subject to the usual rough treatment only a slow wear and is very robust.
  • At least one further layer namely a wear layer or cover layer can be provided, which is arranged on the side facing away from the support layer of the core layer.
  • the wear layer may be formed from a metal alloy, in particular from an aluminum alloy, and / or a glass fiber reinforced plastic and / or a material from the group of aromatic polyamides (for example aramid).
  • the wear layer can protect the core layer from wear and stiffen the sandwich construction as a whole.
  • the aluminum alloys mentioned for the support layer and / or wear layer may be aluminum wrought alloys.
  • the main alloying element used may be zinc, with zinc occupying a constituent of 0.7 to 13%, in particular 0.8 to 12%.
  • Such aluminum alloys are very hard.
  • 7075 T6 or 7075 T7 may be used as the material.
  • an aluminum wrought alloy with the main alloying element copper may be used, whereby copper may occupy a constituent of 0.5 to 9%, in particular 0.7 to 8%.
  • materials such as 2024 T3 / T4, 2026 T3511, 2056 T3, 2524 T3, 5052, 6061 T4, 7075 T761 or 7475 T61 are conceivable, for example.
  • Particularly good properties are 2024 T3 / T4, 2056 T3 or 2524 T3, since these materials sufficiently stiffen the cargo hold floor and have a long service life under load.
  • the wear layer is connected by form and / or material bond with the core layer.
  • the aluminum alloys mentioned may be aluminum alloys with a solution-annealed and / or heat-aging and / or over-hardening heat treatment, so that a sufficient strength is achieved.
  • the core layer may have a thickness of at least 1 mm, in particular at least 1.5 mm, in particular at least 2 mm, in particular at least 4 mm, in particular at least 6 mm.
  • the core layer comprises a solid core.
  • a core may be understood to mean a core that is essentially solid. That is, the core layer is at least 50%, in particular at least 70%, in particular at least 90% of carbon fiber reinforced and / or glass fiber reinforced plastic constructed. Larger contiguous cavities, in particular honeycomb or the like, are not provided.
  • the wear layer may have a thickness of 0.1 to 1 mm, in particular from 0.2 to 0.6 mm, in particular from 0.25 to 0.5 mm.
  • a freight container according to claim 14 which comprises a cargo floor, as has already been explained, as well as side walls arranged on the cargo floor.
  • the freight container has similar advantages as those already explained in connection with the cargo floor.
  • the cargo floor comprises an at least partially circumferential edge profile, in the form of a bead, for connecting the side walls to the cargo compartment floor.
  • the cargo compartment floor can be formed so that it has a peripheral edge, which can then be inserted into the encircling container corner profiles so that no rivets for the connection of the floor with the side walls are necessary.
  • the side walls may be at least partially made of glass fiber reinforced and / or carbon fiber reinforced plastic.
  • the method is used to produce a cargo hold floor, as has already been described.
  • the bonding of the support layer to the core layer can be carried out by applying and / or vulcanizing a bonding layer from the group of elastomers.
  • the core is made from a variety of core layers.
  • the core layers have at least two core layers of carbon fiber reinforced and / or glass fiber reinforced and / or aramid fiber reinforced plastic, wherein the fiber orientation of the individual core layers differs.
  • a core layer of the core comprises a foam having a support structure.
  • the core layers can be bonded together by applying a synthetic resin.
  • a curing of the plastic takes place at Temperatures between 100 and 200 degrees, in particular between 150 and 180 degrees.
  • the curing of the core layer (s) may occur simultaneously with the bonding of the overlay layer to the core.
  • the applied thermal energy for curing the core may be used to bond an at least partially unvulcanized rubber to the overlay layer and the core.
  • an adhesive may be used to make the bond between the overlay layer and the core layer.
  • a polyurethane adhesive may be used to bond the layers together.
  • Fig. 1 shows a cuboid freight container 10, which has a freight container height h, cargo container width b and a cargo container length I.
  • the freight container 10 has a bottom plate 20, which is arranged opposite a cover plate 13 and can be regarded as an embodiment of the cargo floor according to the invention.
  • the lateral surface of the cuboid freight container 10 is formed by the side walls 12a to 12d, in particular a first side wall 12a, a second side wall 12b, a third side wall 12c and a fourth side wall 12d.
  • the side walls 12a to 12d are arranged in pairs opposite each other.
  • the Fig. 2 shows a cross section through the bottom plate 20 of the freight container 10.
  • the bottom plate 20 is constructed in a multi-layer structure comprising a support layer 21 and a core 40.
  • the support layer 21 forms the lower layer and is connected in a planar manner to the core 40 by material connection, the core resting on the support layer 21.
  • the base plate 20 is thus constructed as a composite material, wherein the core 40 of a core layer, namely of a CFK layer 42 (carbon reinforced plastic), and the support layer 21 of an aluminum alloy (eg a material with the designation 7075 T6 or 2024 T3 / T4 ) consists.
  • the overlay layer 21 has a overlay layer thickness h1 of 1 mm and the CFK layer 42 has a core layer thickness h2 of at least 2 mm.
  • the aluminum alloy has a strength of at least 500 N / mm 2 .
  • the Fig. 3 shows a further embodiment of a bottom plate 20, wherein this is constructed in three layers.
  • this bottom plate 20 has a wear layer 23, a core 40 consisting of a CFK layer 42 as a core layer and a support layer 21.
  • the wear layer 23 may be made of glass fiber reinforced plastic or aramid.
  • the overlay layer 21 is made of a metal alloy, preferably an aluminum alloy.
  • a wear layer thickness h3 amounts to approximately 0.25 to 0.5 mm, while the core layer thickness h2 is approximately 3 mm and the layer thickness h1 is approximately 1 mm.
  • the base plate 20 as sandwich panels has the advantage that the at least one core layer (eg CFRP layer 42) is protected by the wear layer 23. Furthermore, the multilayer structure leads to an increase in the stability of the entire bottom plate 20.
  • the wear layer 23 may also be made of an aluminum alloy, eg 7075 T7 or 7075 T6. Theoretically, a steel sheet could also be used, but an electrically nonconductive layer should be preferred, since this may be provided on RFID tags 14 (possibly provided on or in the freight container 10). Fig. 1 ) has no influences.
  • the bottom plate 20 preferably has a circumferential bottom plate profile 25 (FIG. Fig. 4 ) which can be inserted into a container corner profile to secure the bottom plate 20 to the side walls 12a to 12d. It can therefore be dispensed with additional fastening means, such as a welded joint or rivets.
  • the freight containers 10 according to the invention preferably have a bottom plate 20, which are equipped at the bottom with a support layer 21, which is made of a metal alloy, in particular an aluminum alloy.
  • a support layer 21 which is made of a metal alloy, in particular an aluminum alloy.
  • the base plate 20 is thus constructed of at least three layers and designed as a composite material or composite material.
  • a connection of the individual layers, in particular the support layer 21 and / or core layer and / or wear layer 23, by means of material or form fit, with a fabric bond is preferable.
  • a Connection between the individual layers can be made directly or indirectly.
  • FIGS. 5 and 6 Further exemplary embodiments of the cargo compartment floor 20 are based on the FIGS. 5 and 6 ,
  • FIG. 10 shows a cargo hold floor 20 having a core 40 and an aluminum alloy overlay 21.
  • the core 40 is made of a CFK layer 42 and connected via a rubber layer 47 with the support layer 21.
  • the rubber layer 47 may be bonded to the CFK layer 42 and / or the overlay layer 21. It is conceivable to use a PU adhesive. Alternatively, the rubber layer 47 may be vulcanized onto the support layer 21 and / or the CFK layer 42.
  • the core 40 is multilayered in this example and connected via a rubber layer 47 as a connecting layer with the support layer 21.
  • the core 40 comprises a foam layer 43, wherein alternately the foam layer 43, a first CFK layer 42 and a second CFK layer 44 are arranged.
  • the foam layer 43, the first CFRP layer 42 and the second CFRP layer 44 are glued together via a synthetic resin.
  • the foam layer 43 has honeycomb-shaped recesses that allow the cured resin to make an immediate bond between the first CFRP layer 42 and the second CFRP layer 44.
  • the foam layer 43 sheathed by the CFK layers 42, 44 is particularly well suited for picking up vertical loads without causing compression of the core 40.
  • the cured resin in the recesses of the foam layer 43 thus forms a Stz structure.
  • a GRP layer 41 is arranged on the side facing away from the support layer 21 of the first CFRP layer 42.
  • This GRP layer 41 may be a wear layer 43, which is the protects first CFK layer 42 from wear. It is possible to bond the GRP layer in the course of the production of the core 40 with this.
  • the CFRP layer 42 may comprise a first network of glass fibers and the first CFRP layer 42 a second network of plastic fibers with the fibers of the first network disposed at a 45 degree angle to the fibers of the second network. Overall, therefore, the following structure could result: + 45 / -45 degrees GRP layer, 0/90 degree CFRP layer, foam core (e.g., Rohacell), 0/90 degree CFRP layer.
  • the first CFRP layer 42 may, for example, have a thickness of 0.2 mm to 0.6 mm, in particular 0.4 mm.
  • the foam layer 43 may have a thickness of 1.0 to 8.0 mm, in particular from 1.8 to 6.0 mm.
  • the second CFRP layer 44 may have similar or identical thickness ratios as the first CFRP layer 42.
  • the overlay layer 21 in the embodiment shown has a thickness of 1.0 to 1.5 mm and consists of 2024 T3.
  • a metal layer for. B. aluminum, arranged on both sides of a core, e.g. B. a core 40, as described above.
  • the connection between the layers can be done by gluing and / or vulcanization.
  • This sandwich arrangement has the advantage that the base plate 20 deforms only slightly with temperature fluctuations.
  • the manufacturing process is simple, since the support layer 21 and the wear layer 23 of metal or a metal alloy in a manufacturing step connected to the core 40, z. B. glued, can be.
  • the bonding of the layers may be carried out under temperature (eg greater than 20 °, greater than 30 °, greater than 40 °).
  • the production steps mentioned can be carried out before joining the layers. Theoretically, however, it is also conceivable to produce one of the layers first and then to build up the further layer on this base layer.
  • the aluminum alloy may form the base layer on which the core layer 22 with the carbon reinforcement and / or glass fiber reinforcement and / or aramid fiber reinforcement is produced successively.
  • a wear layer 23 can be applied. Again, it is possible to first make the support layer 21, the core layer 22 and the wear layer 23 and then produce a material connection between the individual layers. Alternatively, the overlay layer 21 and the wear layer 23 may be formed and the core layer 22 successively built up on the overlay layer 21 and / or the wear layer 23. The composite may then be made by joining the overlay layer 21 with or without the core layer 22 and the wear layer 23 with or without the core layer 22.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)
  • Body Structure For Vehicles (AREA)
  • Pallets (AREA)

Description

Die vorliegende Erfindung betrifft einen Frachtboden, einen Frachtcontainer und ein Verfahren zur Herstellung eines Frachtbodens. Für den effektiven Transport von Ladung in Flugzeugen sind Frachtcontainer und Frachtpaletten unverzichtbar, da sie ein schnelles Be- und Entladen des Flugzeugs ermöglichen. Die überwiegende Anzahl von kommerziell eingesetzten Flugzeugen kann eine Vielzahl von Frachtcontainern oder Frachtpaletten aufnehmen. Die meisten Container bzw. Paletten sind normiert, so dass diese unabhängig von dem für den Transport verwendeten Flugzeug eingesetzt werden können. Bis vor 10 Jahren wurden Frachtcontainer ausschließlich aus Aluminium hergestellt, wobei das Eigengewicht des Containers ca. 100 kg betrug. Die momentan verwendeten Container greifen teilweise auf leichtere Materialien zurück, so dass inzwischen Frachtcontainer mit einem Gewicht von ca. 60 kg verwendet werden. Es sollte offensichtlich sein, dass die Verringerung des Eigengewichts der verwendeten Container oder Paletten erhebliche finanzielle sowie ökologische Auswirkungen mit sich bringt. Frachtcontainer sind beispielsweise aus der EP10520745A1 , der DE102007035228A1 , der WO00/21861A2 , der DE 69 702 821 T2 , der US 5,941,405 , der DE 20 64 241 und der DE 102 008 005 010 A1 bekannt. Auch die Verwendung von Textilien bzw. Gewebe (vgl. US 4,538,663 ) oder von nichtmetallischen Materialien (vgl. JP 07257683 A , DE 69616182 T2 und DE 3409683 A1 ) in diesem Bereich wurde in Betracht gezogen.The present invention relates to a cargo floor, a freight container and a method for producing a cargo floor. Freight containers and cargo pallets are indispensable for the effective transport of cargo in aircraft, as they allow a fast loading and unloading of the aircraft. The vast majority of commercial aircraft can accommodate a variety of freight containers or cargo pallets. Most containers or pallets are standardized so that they can be used independently of the aircraft used for transport. Until 10 years ago, freight containers were made exclusively of aluminum, with the weight of the container was about 100 kg. The currently used containers are partly based on lighter materials, so that freight containers weighing around 60 kg are now being used. It should be obvious that reducing the dead weight of the containers or pallets used has a significant financial and environmental impact. Freight containers are for example from the EP10520745A1 , of the DE102007035228A1 , of the WO00 / 21861A2 , of the DE 69 702 821 T2 , of the US 5,941,405 , of the DE 20 64 241 and the DE 102 008 005 010 A1 known. The use of textiles or fabrics (cf. US 4,538,663 ) or non-metallic materials (cf. JP 07257683 A . DE 69616182 T2 and DE 3409683 A1 ) in this area was considered.

Bei dem Aufbau eines Frachtcontainers oder einer Frachtpalette ist es wesentlich, wie der Frachtboden ausgestaltet ist. Auf diesem ruht die gesamte Last der verladenen Frachtstücke. Des Weiteren werden die Frachtcontainer oder Frachtpaletten häufig unsachgemäß zwischengeparkt, so dass teilweise große punktuelle Lasten auf die Frachtböden wirken. Frachtcontainer und Frachtpaletten werden vollautomatisch oder teilweise automatisch auf dem Frachtdeck des Flugzeugs an einer vorgegebenen Position geparkt und verriegelt. Für den Antrieb der Frachtcontainer und Frachtpaletten sorgen in das Frachtdeck eingelassene Rollenantriebseinheiten (PDUs: Power Drive Units) oder Frachtantriebseinheiten. Diese Frachtantriebseinheiten verfügen über Rollen, die mit einem Elastomer (z.B. Gummi) beschichtet sind und am Frachtboden ansetzen, um entsprechende Kräfte aufzubringen. Bei der Konstruktion von Frachtcontainern ist es daher notwendig, die Frachtcontainerböden bzw. Frachtböden derart auszugestalten, dass ausreichend Kraft mittels der Rollen übertragen werden kann. Auch hier wirken hohe Kräfte auf Teilbereiche der Frachtböden, die zu einer schnellen Abnutzung führen können.In the construction of a freight container or cargo pallet, it is essential how the cargo floor is configured. On this rests the entire load of the loaded cargo. Furthermore, the freight containers or freight pallets are often parked improperly, so that in some cases large punctual loads act on the cargo floors. Freight containers and freight pallets are parked and locked fully automatically or partially automatically on the cargo deck of the aircraft at a predetermined position. To drive the freight containers and freight pallets, roller drive units (PDUs: Power Drive Units) or cargo drive units are embedded in the cargo deck. These cargo propulsion units have rollers that are coated with an elastomer (eg rubber) and attach to the cargo floor to apply appropriate forces. In the construction of freight containers, it is therefore necessary to design the cargo container floors or cargo floors so that sufficient force can be transmitted by means of the rollers. Again, high forces act on parts of the cargo floors, which can lead to rapid wear.

Ausgehend von dem genannten Stand der Technik ist es Aufgabe der vorliegenden Erfindung, einen Frachtcontainer mit einem verbesserten Frachtboden und einen entsprechenden Frachtboden allein bereitzustellen. Insbesondere sollen die neuen Frachtböden und Frachtcontainer leichter, funktionell einsetzbar und robust sein.Based on the cited prior art, it is an object of the present invention to provide a freight container with an improved cargo floor and a corresponding cargo floor alone. In particular, the new cargo floors and cargo containers should be lighter, functionally applicable and robust.

Diese Aufgabe wird durch einen Frachtboden gemäß dem Anspruch 1 gelöst.This object is achieved by a cargo floor according to claim 1.

Insbesondere wird diese Aufgabe durch einen Frachtboden mit mindestens einer Kernschicht aus kohlenstoffverstärktem und/oder glasfaserverstärktem und / oder aramidfaserverstärktem Kunststoff und einer Auflageschicht aus einer Metalllegierung, insbesondere aus einer Aluminiumlegierung, gelöst, wobei es sich hierbei um einen Verbundstoff handelt.In particular, this object is achieved by a cargo floor with at least one core layer of carbon-reinforced and / or glass-fiber reinforced and / or aramid fiber reinforced plastic and a support layer of a metal alloy, in particular an aluminum alloy, which is a composite material.

Ein wesentlicher Gedanke der vorliegenden Erfindung besteht darin, das Gewicht des Frachtbodens dadurch zu reduzieren, dass dieser aus mehreren Schichten, insbesondere in einer Sandwichbauweise, hergestellt wird, wobei für die Schichten Materialien aus Metall sowie aus Kunststoff verwendet werden. Hierbei werden gegebene Anforderungen, z.B. gute Reib- und Verschleißverhältnisse, berücksichtigt, wobei ein insgesamt sehr stabiler Verbundwerkstoff oder Kompositwerkstoff bereitgestellt wird.An essential idea of the present invention is to reduce the weight of the cargo floor by producing it from several layers, in particular in a sandwich construction, whereby materials of metal and of plastic are used for the layers. Here, given requirements, e.g. good friction and wear conditions, taking into account a total of very stable composite material or composite material is provided.

Erfindungsgemäß erfolgt eine Verbindung der Schichten durch Stoff- und/oder Formschluss, wobei ein Stoffschluss zu besonders guten Ergebnissen führt.According to the invention, the layers are joined by material and / or form-fitting, wherein a material bond leads to particularly good results.

Der Frachtboden umfasst eine Vielzahl von Kernschichten Diese Kernschichten bilden einen Kern aus. Die Kernschichten sind faserverstärkt, wobei eine erste Kernschicht eine erste Faserausrichtung haben kann, die sich von einer zweiten Faserausrichtung einer zweiten Kernschicht unterscheidet. Beispielsweise können zwei Kernschichten derart angeordnet sein, dass sich die erste Faserausrichtung von der zweiten Faserausrichtung um einen Absolutwinkel von mindestens 20 oder 30 oder 40 oder 45 Grad oder 90 Grad unterscheidet. Der Absolutwinkel kann derart definiert sein, dass dieser der kleinste absolute Winkelwert zwischen zwei Faserausrichtungen ist.The cargo floor comprises a large number of core layers. These core layers form a core. The core layers are fiber reinforced, wherein a first core layer may have a first fiber orientation that is different from a second fiber orientation of a second core layer. For example, two core layers may be arranged such that the first fiber orientation differs from the second fiber orientation by an absolute angle of at least 20 or 30 or 40 or 45 degrees or 90 degrees. The absolute angle may be defined to be the smallest absolute angle value between two fiber orientations.

Mindestens eine Kernschicht umfasst ein Fasernetz aus Kohlenstofffasern und/oder Glasfasern und/oder Aramidfasern. Die Fasern innerhalb eines Fasernetzes können zueinander im Wesentlichen rechtwinklig verlaufen, so dass sich ein Gitternetz ergibt. Eine entsprechende Kernschicht ist besonders haltbar. Auch die Kernschichten mit Fasernetzen können derart angeordnet sein, dass sich die Faserausrichtungen zweier Kernschichten um 20 oder 30 oder 40 oder 45 Grad oder 90 Grad unterscheiden. Auch diese Winkelangabe kann als Absolutwinkel verstanden werden.At least one core layer comprises a fiber network of carbon fibers and / or glass fibers and / or aramid fibers. The fibers within a fiber network may be substantially perpendicular to each other so that a mesh results. A corresponding core layer is particularly durable. The core layers with fiber nets can also be arranged such that the fiber orientations of two core layers differ by 20 or 30 or 40 or 45 degrees or 90 degrees. This angle specification can also be understood as an absolute angle.

Der Frachtboden umfasst mindestens eine Kernschicht mit einer Schaumschicht. Hier kann ein Schaumstoff mit zelliger Struktur und niedriger Dichte verwendet werden. Der Schaumstoff ist zumindest teilweise mit Kunstharz getränkt. Der Schaumstoff führt dazu, dass der erfindungsgemäße Frachtraumboden ein geringes Gewicht aufweist, wobei das Kunstharz die Konstruktion versteift.The cargo floor comprises at least one core layer with a foam layer. Here a foam with cellular structure and low density can be used. The foam is at least partially impregnated with synthetic resin. The foam causes the cargo space floor according to the invention has a low weight, wherein the synthetic resin stiffens the construction.

Die Schaumschicht umfasst eine Stützstruktur. Erfindungsgemäß erstreckt sich diese Stützstruktur vertikal zu dem Frachtraumboden, so dass diese an der Schaumschicht anliegende Schichten fest miteinander verbindet. Die Stützstruktur ist aus einem Kunstharz ausgebildet. Die Stützstruktur kann eine rechteckige oder wabenförmige oder runde Form aufweisen, um vertikal wirkende Kräfte aufzunehmen.The foam layer comprises a support structure. According to the invention, this support structure extends vertically to the cargo compartment floor, so that it connects to the foam layer adhering layers firmly together. The support structure is formed of a synthetic resin. The support structure can be a have rectangular or honeycomb or round shape to accommodate vertical forces.

Die Schaumschicht kann zwischen einer ersten Kernschicht aus kohlenstofffaserverstärktem und/oder glasfaserverstärktem und/oder aramidfaserverstärktem Kunststoff und einer zweiten Kernschicht aus kohlenstofffaserverstärktem und/oder glasfaserverstärktem und/oder aramidfaserverstärktem Kunststoff eingelagert sein. Vorzugsweise sind die einzelnen Schichten durch Stoffschluss miteinander verbunden. Beispielsweise kann eine Verbindung der Schichten durch Kunstharz hergestellt werden. Vorzugsweise weist die Schaumschicht die bereits beschriebene Stützstruktur auf, die sich im Wesentlichen senkrecht zu der Faserrichtung bzw. den Faserrichtungen der ersten und zweiten Kernschicht erstreckt.The foam layer may be formed between a first core layer of carbon fiber reinforced and / or glass fiber reinforced and / or aramid fiber reinforced plastic and a second core layer embedded carbon fiber reinforced and / or glass fiber reinforced and / or aramid fiber reinforced plastic. Preferably, the individual layers are interconnected by material bond. For example, a compound of the layers can be made by synthetic resin. Preferably, the foam layer has the support structure already described, which extends substantially perpendicular to the fiber direction or the fiber directions of the first and second core layer.

Mindestens eine Kernschicht kann auf einer der Auflageschicht zugewandten Seite eine Verbindungsschicht aufweisen. Diese Verbindungsschicht kann zur Verbindung der entsprechenden Kernschicht oder des Kerns mit der Auflageschicht dienen. Vorzugsweise handelt es sich hierbei um die Kernschicht, die unmittelbar zur Auflageschicht benachbart angeordnet ist. Die Verbindungsschicht kann aus einem Elastomer hergestellt werden. Vorzugsweise dient diese Verbindungsschicht zum einen zur Verbindung der Auflageschicht mit dem Kern oder den Kernschichten. Des Weiteren gleicht die Verbindungsschicht eine sich unterscheidende Wärmedehnung zwischen dem Kern mit der mindestens einen Kernschicht und der Auflageschicht aus. Dies kann vorteilhaft sein, wenn der erfindungsgemäße Frachtraumboden hergestellt wird, oder dieser bei dessen Verwendung starken Temperaturschwankungen ausgesetzt ist.
Alternativ oder zusätzlich kann ein Klebstoff, insbesondere ein PolyurethanKleber, zur Verbindung der Auflageschicht mit der Kernschicht verwendet werden.At least one core layer may have a connection layer on a side facing the support layer. This tie layer may serve to bond the corresponding core layer or core to the overlay layer. This is preferably the core layer, which is arranged directly adjacent to the support layer. The tie layer may be made of an elastomer. Preferably, this connection layer serves firstly to connect the support layer to the core or the core layers. Furthermore, the tie layer compensates for a differential thermal expansion between the core having the at least one core layer and the overlay layer. This can be advantageous if the cargo space floor according to the invention is produced, or if it is exposed to strong temperature fluctuations during its use.
Alternatively or additionally, an adhesive, in particular a polyurethane adhesive, can be used to bond the support layer to the core layer.

Die Verbindungsschicht kann mit der Kernschicht und/oder der Auflageschicht durch Stoffschluss, insbesondere durch Aufvulkanisierung, verbunden werden. Vorzugsweise dient die Auflageschicht aus der Metalllegierung als Außenschicht, an der die Frachtantriebseinheiten angreifen. Des Weiteren nimmt diese Schicht punktuelle Belastungen auf und verteilt sie flächig. Eine Aluminiumlegierung ist hier besonders geeignet, da sich in Verbindung mit herkömmlichen Rollen von Frachtantriebseinheiten ein guter Reibungskoeffizient ergibt. Die Kernschichten versteifen die gesamte Konstruktion und führen zu erheblichen Gewichtsersparnissen.The bonding layer can be bonded to the core layer and / or the overlay by adhesion, in particular by vulcanization. Preferably, the overlay layer of the metal alloy serves as the outer layer against which the cargo drive units engage. Furthermore, this layer absorbs punctual loads and distributes them over a wide area. An aluminum alloy is particularly suitable here, since a good coefficient of friction results in connection with conventional rollers of cargo drive units. The core layers stiffen the entire construction and lead to significant weight savings.

Die Auflageschicht kann eine Dicke von 0,5 mm bis 2,5 mm, insbesondere von 0,7 mm bis 1,5 mm, insbesondere von 0,9 mm bis 1,5 mm aufweisen. Vorzugsweise hat die Auflageschicht im Verhältnis zu der Dicke des gesamten Frachtbodens nur eine geringe Dicke, z.B. weniger als 40%, insbesondere weniger als 30%, insbesondere weniger als 20% der Gesamtdicke. Insofern können deutlich leichtere Frachtböden hergestellt werden.The support layer may have a thickness of 0.5 mm to 2.5 mm, in particular from 0.7 mm to 1.5 mm, in particular from 0.9 mm to 1.5 mm. Preferably, the support layer has only a small thickness, eg less than 40%, in particular less than 30%, in relation to the thickness of the entire cargo floor. in particular less than 20% of the total thickness. In this respect, significantly lighter cargo floors can be produced.

Die Auflageschicht kann eine Festigkeit von mehr als 400 N/mm2, insbesondere mehr als 500 N/mm2 aufweisen. Insofern kann die Auflageschicht die Kernschicht vor hohen punktuellen Belastungen schützen. Der erfindungsgemäße Frachtboden unterliegt bei der üblichen rauen Behandlung nur einer langsamen Abnutzung und ist sehr robust.The support layer may have a strength of more than 400 N / mm 2 , in particular more than 500 N / mm 2 . In this respect, the overlay layer can protect the core layer from high punctual loads. The cargo floor according to the invention is subject to the usual rough treatment only a slow wear and is very robust.

Vorzugsweise kann jedoch mindestens eine weitere Schicht, nämlich eine Verschleißschicht oder Deckelschicht vorgesehen werden, die auf der der Auflageschicht abgewandten Seite der Kernschicht angeordnet ist.Preferably, however, at least one further layer, namely a wear layer or cover layer can be provided, which is arranged on the side facing away from the support layer of the core layer.

Die Verschleißschicht kann aus einer Metalllegierung, insbesondere aus einer Aluminiumlegierung, und/oder einem glasfaserverstärkten Kunststoff und/oder einem Werkstoff aus der Gruppe der aromatischen Polyamide (z.B. Aramid) ausgebildet sein. Die Verschleißschicht kann die Kernschicht vor einer Abnutzung schützen und die Sandwichkonstruktion insgesamt versteifen.The wear layer may be formed from a metal alloy, in particular from an aluminum alloy, and / or a glass fiber reinforced plastic and / or a material from the group of aromatic polyamides (for example aramid). The wear layer can protect the core layer from wear and stiffen the sandwich construction as a whole.

Die genannten Aluminiumlegierungen für die Auflageschicht und/oder Verschleißschicht können Aluminiumknetlegierungen sein. Das verwendete Hauptlegierungselement kann Zink sein, wobei Zink ein Bestandteil von 0,7 bis 13%, insbesondere 0,8 bis 12% einnimmt. Derartige Aluminiumlegierungen sind sehr hart. Beispielsweise kann 7075 T6 oder 7075 T7 als Material verwendet werden.The aluminum alloys mentioned for the support layer and / or wear layer may be aluminum wrought alloys. The main alloying element used may be zinc, with zinc occupying a constituent of 0.7 to 13%, in particular 0.8 to 12%. Such aluminum alloys are very hard. For example, 7075 T6 or 7075 T7 may be used as the material.

Andererseits kann eine Aluminiumknetlegierung mit dem Hauptlegierungselement Kupfer verwendet werden, wobei Kupfer ein Bestandteil von 0,5 bis 9%, insbesondere 0,7 bis 8% einnehmen kann. Zusätzlich zu den bereits genannten Materialien 7075 T6, 7075 T7 sind beispielsweise Materialien wie 2024 T3/T4, 2026 T3511, 2056 T3, 2524 T3, 5052, 6061 T4, 7075 T761 oder 7475 T61 denkbar. Besonders gute Eigenschaften haben 2024 T3/T4, 2056 T3 oder 2524 T3, da diese Materialien den Frachtraumboden ausreichend versteifen und eine lange Lebensdauer unter Belastung haben.On the other hand, an aluminum wrought alloy with the main alloying element copper may be used, whereby copper may occupy a constituent of 0.5 to 9%, in particular 0.7 to 8%. In addition to the materials 7075 T6, 7075 T7 already mentioned, materials such as 2024 T3 / T4, 2026 T3511, 2056 T3, 2524 T3, 5052, 6061 T4, 7075 T761 or 7475 T61 are conceivable, for example. Particularly good properties are 2024 T3 / T4, 2056 T3 or 2524 T3, since these materials sufficiently stiffen the cargo hold floor and have a long service life under load.

Vorzugsweise ist auch die Verschleißschicht durch Form- und/oder Stoffschluss mit der Kernschicht verbunden.Preferably, the wear layer is connected by form and / or material bond with the core layer.

Die genannten Aluminiumlegierungen können Aluminiumlegierungen mit einer lösungsgeglühten und/oder wärmeausgelagerten und/oder überhärteten Wärmebehandlung sein, so dass eine ausreichende Festigkeit erzielt wird.The aluminum alloys mentioned may be aluminum alloys with a solution-annealed and / or heat-aging and / or over-hardening heat treatment, so that a sufficient strength is achieved.

Die Kernschicht kann eine Dicke von mindestens 1 mm, insbesondere mindestens 1,5 mm, insbesondere mindestens 2 mm, insbesondere mindestens 4 mm, insbesondere mindestens 6 mm, aufweisen.The core layer may have a thickness of at least 1 mm, in particular at least 1.5 mm, in particular at least 2 mm, in particular at least 4 mm, in particular at least 6 mm.

In einem Ausführungsbeispiel umfasst die Kernschicht einen Massivkern. Anmeldungsgemäß kann unter einem Massivkern ein Kern verstanden werden, der im Wesentlichen solide ist. Das heißt, die Kernschicht ist zu mindestens 50%, insbesondere zumindest 70%, insbesondere zumindest 90% aus kohlenstofffaserverstärktem und/oder glasfaserverstärktem Kunststoff aufgebaut. Größere zusammenhängende Hohlräume, insbesondere Waben oder Ähnliches, sind nicht vorgesehen.In one embodiment, the core layer comprises a solid core. According to the application, a core may be understood to mean a core that is essentially solid. That is, the core layer is at least 50%, in particular at least 70%, in particular at least 90% of carbon fiber reinforced and / or glass fiber reinforced plastic constructed. Larger contiguous cavities, in particular honeycomb or the like, are not provided.

Die Verschleißschicht kann eine Dicke von 0,1 bis 1 mm, insbesondere von 0,2 bis 0,6 mm, insbesondere von 0,25 bis 0,5 mm haben.The wear layer may have a thickness of 0.1 to 1 mm, in particular from 0.2 to 0.6 mm, in particular from 0.25 to 0.5 mm.

Die genannte Aufgabe wird des Weiteren durch einen Frachtcontainer gemäß Anspruch 14 gelöst, der einen Frachtboden, wie dieser bereits erläutert wurde, sowie an dem Frachtboden angeordnete Seitenwände umfasst. Für den Frachtcontainer ergeben sich ähnliche Vorteile, wie diese bereits in Verbindung mit dem Frachtboden erläutert wurden.The stated object is further achieved by a freight container according to claim 14, which comprises a cargo floor, as has already been explained, as well as side walls arranged on the cargo floor. The freight container has similar advantages as those already explained in connection with the cargo floor.

Der Frachtboden umfasst ein zumindest abschnittsweise umlaufendes Randprofil, in Form eines Wulstes, zur Verbindung der Seitenwände mit dem Frachtraumboden. Letztendlich kann der Frachtraumboden so ausgebildet sein, dass er einen umlaufenden Rand hat, welcher dann in die umlaufenden Containereckprofile eingeschoben werden kann, damit keine Nieten für die Verbindung des Bodens mit den Seitenwänden notwendig sind.The cargo floor comprises an at least partially circumferential edge profile, in the form of a bead, for connecting the side walls to the cargo compartment floor. Finally, the cargo compartment floor can be formed so that it has a peripheral edge, which can then be inserted into the encircling container corner profiles so that no rivets for the connection of the floor with the side walls are necessary.

Die Seitenwände können zumindest abschnittsweise aus glasfaserverstärktem und/oder kohlenstofffaserverstärktem Kunststoff gefertigt sein.The side walls may be at least partially made of glass fiber reinforced and / or carbon fiber reinforced plastic.

Die genannte Aufgabe wird des Weiteren durch ein Verfahren zur Herstellung gemäß Anspruch 17 gelöst.The stated object is further achieved by a method for the production according to claim 17.

Das Herstellungsverfahren umfasst die folgenden Schritte:

  • Herstellen eines Kerns mit mindestens einer Kernschicht aus kohlenstofffaserverstärktem und/oder glasfaserverstärktem und/or aramidfaserverstärktem Kunststoff;
  • Herstellen einer Auflageschicht aus einer Metalllegierung, insbesondere aus einer Aluminiumlegierung;
  • Verbinden der Auflageschicht mit der mindestens einen Kernschicht durch Stoffschluss und/oder Materialschluss.
The manufacturing process comprises the following steps:
  • Producing a core with at least one core layer of carbon fiber reinforced and / or glass fiber reinforced and / or aramidfaserverstärktem plastic;
  • Producing a support layer of a metal alloy, in particular of an aluminum alloy;
  • Connecting the support layer with the at least one core layer by material bond and / or material connection.

Erfindungsgemäß dient das Verfahren dazu, einen Frachtraumboden herzustellen, wie dieser bereits beschrieben wurde.According to the invention, the method is used to produce a cargo hold floor, as has already been described.

Das Verbinden der Auflageschicht mit der Kernschicht kann durch ein Auftragen und/oder Aufvulkanisieren einer Verbindungsschicht aus der Gruppe der Elastomere erfolgen.The bonding of the support layer to the core layer can be carried out by applying and / or vulcanizing a bonding layer from the group of elastomers.

Der Kern wird aus einer Vielzahl von Kernschichten hergestellt.The core is made from a variety of core layers.

Erfindungsgemäß weisen die Kernschichten mindestens zwei Kernschichten aus kohlenstofffaserverstärktem und/oder glasfaserverstärktem und/oder aramidfaserverstärktem Kunststoff auf, wobei sich die Faserausrichtung der einzelnen Kernschichten unterscheidet.According to the invention, the core layers have at least two core layers of carbon fiber reinforced and / or glass fiber reinforced and / or aramid fiber reinforced plastic, wherein the fiber orientation of the individual core layers differs.

Zur Reduzierung des Gewichts umfasst eine Kernschicht des Kerns einen Schaumstoff mit einer Stützstruktur.To reduce the weight, a core layer of the core comprises a foam having a support structure.

Die Kernschichten können durch ein Aufbringen eines Kunstharzes miteinander verbunden werden. Vorzugsweise erfolgt ein Aushärten des Kunststoffs bei Temperaturen zwischen 100 und 200 Grad, insbesondere zwischen 150 und 180 Grad. Das Aushärten der Kernschicht bzw. der Kernschichten kann gleichzeitig mit dem Verbinden der Auflageschicht mit dem Kern erfolgen. Beispielsweise kann die aufgebrachte Wärmeenergie zum Aushärten des Kerns dazu verwendet werden, einen zumindest teilweise unvulkanisierten Gummi mit der Auflageschicht und dem Kern zu verbinden. Alternativ kann ein Klebstoff verwendet werden, um die Verbindung zwischen der Auflageschicht und der Kernschicht herzustellen. Beispielsweise kann ein Polyurethan-Kleber verwendet werden, um die Schichten miteinander zu verbinden.The core layers can be bonded together by applying a synthetic resin. Preferably, a curing of the plastic takes place at Temperatures between 100 and 200 degrees, in particular between 150 and 180 degrees. The curing of the core layer (s) may occur simultaneously with the bonding of the overlay layer to the core. For example, the applied thermal energy for curing the core may be used to bond an at least partially unvulcanized rubber to the overlay layer and the core. Alternatively, an adhesive may be used to make the bond between the overlay layer and the core layer. For example, a polyurethane adhesive may be used to bond the layers together.

Weitere vorteilhafte Ausführungsformen ergeben sich anhand der Unteransprüche.Further advantageous embodiments will be apparent from the dependent claims.

Nachfolgend wird die Erfindung mittels mehrerer Ausführungsbeispiele beschrieben, die anhand von Abbildungen näher erläutert werden.The invention will be described by means of several embodiments, which are explained in more detail with reference to figures.

Hierbei zeigen:

Fig. 1
eine schematische Darstellung eines Frachtcontainers mit einer Bodenplatte und Seitenwänden;
Fig. 2
einen Querschnitt durch die Bodenplatte aus Fig. 1;
Fig. 3
eine dreischichtige Ausführungsform der Bodenplatte aus Fig. 1;
Fig. 4
einen Ausschnitt eines Randbereichs des Frachtcontainers aus Fig. 1;
Fig. 5
einen Querschnitt durch eine alternative Ausgestaltung einer Bodenplatte (einschichtiger Kern mit Verbindungsschicht); und
Fig. 6
einen Querschnitt durch eine alternative Ausgestaltung einer Bodenplatte (mehrschichtiger Kern mit Verbindungsschicht).
Hereby show:
Fig. 1
a schematic representation of a freight container with a bottom plate and side walls;
Fig. 2
a cross section through the bottom plate Fig. 1 ;
Fig. 3
a three-layered embodiment of the bottom plate Fig. 1 ;
Fig. 4
a section of an edge region of the freight container Fig. 1 ;
Fig. 5
a cross-section through an alternative embodiment of a bottom plate (single-layer core with connecting layer); and
Fig. 6
a cross-section through an alternative embodiment of a bottom plate (multi-layer core with connecting layer).

In der nachfolgenden Beschreibung werden für gleiche und gleich wirkende Teile dieselben Bezugsziffern verwendet.In the following description, the same reference numerals are used for the same and like parts.

Fig. 1 zeigt einen quaderförmig ausgebildeten Frachtcontainer 10, der eine Frachtcontainerhöhe h, Frachtcontainerbreite b und eine Frachtcontainerlänge I aufweist. Fig. 1 shows a cuboid freight container 10, which has a freight container height h, cargo container width b and a cargo container length I.

Der Frachtcontainer 10 hat eine Bodenplatte 20, die gegenüber einer Deckelplatte 13 angeordnet ist und als eine Ausführungsform des erfindungsgemäßen Frachtbodens angesehen werden kann. Die Mantelfläche des quaderförmigen Frachtcontainers 10 wird durch die Seitenwände 12a bis 12d, insbesondere eine erste Seitenwand 12a, eine zweite Seitenwand 12b, eine dritte Seitenwand 12c und eine vierte Seitenwand 12d, gebildet. Die Seitenwände 12a bis 12d sind jeweils paarweise einander gegenüberliegend angeordnet.The freight container 10 has a bottom plate 20, which is arranged opposite a cover plate 13 and can be regarded as an embodiment of the cargo floor according to the invention. The lateral surface of the cuboid freight container 10 is formed by the side walls 12a to 12d, in particular a first side wall 12a, a second side wall 12b, a third side wall 12c and a fourth side wall 12d. The side walls 12a to 12d are arranged in pairs opposite each other.

Die Fig. 2 zeigt einen Querschnitt durch die Bodenplatte 20 des Frachtcontainers 10. In dem in der Fig. 2 gezeigten Ausführungsbeispiel ist die Bodenplatte 20 in einem Mehrschichtaufbau, umfassend eine Auflageschicht 21 und einen Kern 40, aufgebaut. Die Auflageschicht 21 bildet die untere Schicht und ist flächig mit dem Kern 40 durch Stoffschluss verbunden, wobei der Kern auf der Auflageschicht 21 aufliegt. Die Bodenplatte 20 ist also als Verbundwerkstoff aufgebaut, wobei der Kern 40 aus einer Kernschicht, nämlich aus einer CFK-Schicht 42 (kohlenstoffverstärkten Kunststoff),und die Auflageschicht 21 aus einer Aluminiumlegierung (z.B. einem Material mit der Bezeichnung 7075 T6 oder 2024 T3/T4) besteht. Die Auflageschicht 21 hat eine Auflageschichtdicke h1 von 1 mm und die CFK-Schicht 42 eine Kernschichtdicke h2 von mindestens 2 mm. Vorzugsweise hat die Aluminiumlegierung eine Festigkeit von mindestens 500 N/mm2. Mit diesem Aufbau ist es möglich, eine Gewichtsreduzierung der Bodenplatte 20 von ca. 35% bis 50% zu erreichen, wobei bestehende Anforderungen (z.B. guter Kraftschluss mit Rollen von Frachtfördereinrichtungen, hohe Stabilität) erfüllt werden. Da das Hauptgewicht eines herkömmlichen Frachtcontainers 10 immer noch in der Bodenplatte 20 steckt, wird somit das Gesamtgewicht deutlich reduziert. Dies führt beim Transport des Frachtcontainers 10 mit einem Flugzeug zu einer deutlichen Treibstoffeinsparung, die wiederum in einer geringeren CO2-Emission resultiert.The Fig. 2 shows a cross section through the bottom plate 20 of the freight container 10. In the in the Fig. 2 In the embodiment shown, the bottom plate 20 is constructed in a multi-layer structure comprising a support layer 21 and a core 40. The support layer 21 forms the lower layer and is connected in a planar manner to the core 40 by material connection, the core resting on the support layer 21. The base plate 20 is thus constructed as a composite material, wherein the core 40 of a core layer, namely of a CFK layer 42 (carbon reinforced plastic), and the support layer 21 of an aluminum alloy (eg a material with the designation 7075 T6 or 2024 T3 / T4 ) consists. The overlay layer 21 has a overlay layer thickness h1 of 1 mm and the CFK layer 42 has a core layer thickness h2 of at least 2 mm. Preferably, the aluminum alloy has a strength of at least 500 N / mm 2 . With this structure, it is possible to achieve a weight reduction of the bottom plate 20 of about 35% to 50%, whereby existing requirements (eg good traction with rollers of freight conveyors, high stability) are met. Since the main weight of a conventional freight container 10 is still in the bottom plate 20, thus the total weight is significantly reduced. This results in the transport of the cargo container 10 with an aircraft to a significant fuel savings, which in turn results in a lower CO 2 emission.

Die Fig. 3 zeigt ein weiteres Ausführungsbeispiel einer Bodenplatte 20, wobei diese dreilagig aufgebaut ist. In einer Reihenfolge von oben nach unten hat diese Bodenplatte 20 eine Verschleißschicht 23, einen Kern 40, bestehend aus einer CFK-Schicht 42 als Kernschicht und einer Auflageschicht 21. Die Verschleißschicht 23 kann aus glasfaserverstärktem Kunststoff oder Aramid gefertigt sein. Die Auflageschicht 21 ist aus einer Metalllegierung, vorzugsweise einer Aluminiumlegierung, hergestellt. Eine Verschleißschichtdicke h3 beläuft sich auf ca. 0,25 bis 0,5 mm, während die Kernschichtdicke h2 ca. 3 mm und die Auflageschichtdicke h1 ca. 1 mm ist.The Fig. 3 shows a further embodiment of a bottom plate 20, wherein this is constructed in three layers. In a top-down order, this bottom plate 20 has a wear layer 23, a core 40 consisting of a CFK layer 42 as a core layer and a support layer 21. The wear layer 23 may be made of glass fiber reinforced plastic or aramid. The overlay layer 21 is made of a metal alloy, preferably an aluminum alloy. A wear layer thickness h3 amounts to approximately 0.25 to 0.5 mm, while the core layer thickness h2 is approximately 3 mm and the layer thickness h1 is approximately 1 mm.

Diese Ausführung der Bodenplatte 20 als Sandwichpaneele hat den Vorteil, dass die mindestens eine Kernschicht (z.B. CFK-Schicht 42) durch die Verschleißschicht 23 geschützt wird. Des Weiteren führt der mehrschichtige Aufbau zu einer Erhöhung der Stabilität der gesamten Bodenplatte 20. In einem weiteren Ausführungsbeispiel kann die Verschleißschicht 23 ebenfalls aus einer Aluminiumlegierung, z.B. 7075 T7 oder 7075 T6 hergestellt werden. Theoretisch könnte auch ein Stahlblech verwendet werden, wobei jedoch eine elektrisch nicht leitfähige Schicht zu bevorzugen ist, da diese auf möglicherweise am oder im Frachtcontainer 10 vorgesehene RFID Tags 14 (vgl. Fig. 1) keine Einflüsse hat.This embodiment of the base plate 20 as sandwich panels has the advantage that the at least one core layer (eg CFRP layer 42) is protected by the wear layer 23. Furthermore, the multilayer structure leads to an increase in the stability of the entire bottom plate 20. In a further embodiment, the wear layer 23 may also be made of an aluminum alloy, eg 7075 T7 or 7075 T6. Theoretically, a steel sheet could also be used, but an electrically nonconductive layer should be preferred, since this may be provided on RFID tags 14 (possibly provided on or in the freight container 10). Fig. 1 ) has no influences.

Die erfindungsgemäße Bodenplatte 20 weist vorzugsweise ein umlaufendes Bodenplattenprofil 25 (Fig. 4) auf, das in ein Container-Eckenprofil eingeschoben werden kann, um die Bodenplatte 20 an den Seitenwänden 12a bis 12d zu befestigen. Es kann also auf zusätzliche Befestigungsmittel, z.B. eine Schweißverbindung oder Nieten, verzichtet werden.The bottom plate 20 according to the invention preferably has a circumferential bottom plate profile 25 (FIG. Fig. 4 ) which can be inserted into a container corner profile to secure the bottom plate 20 to the side walls 12a to 12d. It can therefore be dispensed with additional fastening means, such as a welded joint or rivets.

Die erfindungsgemäßen Frachtcontainer 10 verfügen vorzugsweise über eine Bodenplatte 20, die nach unten hin mit einer Auflageschicht 21 ausgestattet sind, die aus einer Metalllegierung, insbesondere einer Aluminiumlegierung, hergestellt ist. Dies führt dazu, dass vorhandene Frachtdecks von Flugzeugen mit entsprechenden Frachtfördereinrichtungen zum Transport der Frachtcontainer 10 eingesetzt werden können, ohne dass bezüglich der Reibwerte beim Eingriff der an diesen vorgesehenen Rollen Probleme auftreten. Die erfindungsgemäßen Frachtcontainer 10 sind also universell einsetzbar.The freight containers 10 according to the invention preferably have a bottom plate 20, which are equipped at the bottom with a support layer 21, which is made of a metal alloy, in particular an aluminum alloy. As a result, existing cargo decks of aircraft with corresponding freight conveyors can be used to transport the freight containers 10 without problems occurring with regard to the friction coefficients in the engagement of the rollers provided thereon. The freight container 10 according to the invention are therefore universally applicable.

Erfindungsgemäß ist die Bodenplatte 20 also mindestens dreischichtig aufgebaut und als Verbundwerkstoff oder Kompositwerkstoff ausgeführt. Eine Verbindung der einzelnen Schichten, insbesondere der Auflageschicht 21 und/oder Kernschicht und/oder Verschleißschicht 23, erfolgt per Stoff- oder Formschluss, wobei ein Stoffschluss zu bevorzugen ist. Eine Verbindung zwischen den einzelnen Schichten kann mittelbar oder unmittelbar hergestellt werden.According to the invention, the base plate 20 is thus constructed of at least three layers and designed as a composite material or composite material. A connection of the individual layers, in particular the support layer 21 and / or core layer and / or wear layer 23, by means of material or form fit, with a fabric bond is preferable. A Connection between the individual layers can be made directly or indirectly.

In den beschriebenen Ausführungsformen wurde detailliert auf die quaderförmige Ausgestaltung eines Frachtcontainers 10 eingegangen. Für den hier tätigen Fachmann sollte es offensichtlich sein, dass die Form des Frachtcontainers 10 rein exemplarisch ist und beliebig sein kann. Häufig verwendete Frachtcontainer 10 haben im oberen Bereich eine Abschrägung, um diese optimal an den Frachtraum eines Flugzeuges anzupassen.In the described embodiments, the cuboid configuration of a freight container 10 has been discussed in detail. For the person skilled in the art it should be obvious that the shape of the freight container 10 is purely exemplary and can be arbitrary. Frequently used freight containers 10 have a bevel in the upper area in order to optimally adapt them to the cargo hold of an aircraft.

Weitere erfindungsgemäße Ausführungsbeispiele des Frachtraumbodens 20 ergeben sich anhand der Fig. 5 und 6.Further exemplary embodiments of the cargo compartment floor 20 are based on the FIGS. 5 and 6 ,

Fig. 5 zeigt einen Frachtraumboden 20, der einen Kern 40 und eine Auflageschicht 21 aus einer Aluminiumlegierung aufweist. Der Kern 40 ist aus einer CFK-Schicht 42 hergestellt und über eine Gummi-Schicht 47 mit der Auflageschicht 21 verbunden. Die Gummi-Schicht 47 kann mit der CFK-Schicht 42 und/oder der Auflageschicht 21 verklebt sein. Denkbar ist der Einsatz eines PUKlebers. Alternativ kann die Gummi-Schicht 47 auf die Auflageschicht 21 und/oder die CFK-Schicht 42 aufvulkanisiert sein. Fig. 5 FIG. 10 shows a cargo hold floor 20 having a core 40 and an aluminum alloy overlay 21. The core 40 is made of a CFK layer 42 and connected via a rubber layer 47 with the support layer 21. The rubber layer 47 may be bonded to the CFK layer 42 and / or the overlay layer 21. It is conceivable to use a PU adhesive. Alternatively, the rubber layer 47 may be vulcanized onto the support layer 21 and / or the CFK layer 42.

Ein weiteres Ausführungsbeispiel geht aus der Fig. 6 hervor. Der Kern 40 ist in diesem Beispiel mehrschichtig aufgebaut und über eine Gummi-Schicht 47 als Verbindungsschicht mit der Auflageschicht 21 verbunden. Der Kern 40 umfasst eine Schaumstoffschicht 43, wobei wechselseitig der Schaumstoffschicht 43 eine erste CFK-Schicht 42 bzw. eine zweite CFK-Schicht 44 angeordnet sind. Die Schaumstoffschicht 43, die erste CFK-Schicht 42 und die zweite CFK-Schicht 44 sind über ein Kunstharz miteinander verklebt. Vorzugsweise weist die Schaumstoffschicht 43 wabenförmige Aussparungen auf, die es ermöglichen, dass das ausgehärtete Kunstharz eine unmittelbare Stoffverbindung zwischen der ersten CFK-Schicht 42 und der zweiten CFK-Schicht 44 herstellt. Insofern ist die von den CFK-Schichten 42, 44 ummantelte Schaumstoffschicht 43 besonders gut dazu geeignet, vertikale Lasten aufzunehmen, ohne dass es zu einer Kompression des Kerns 40 kommt. Das ausgehärtete Kunstharz in den Aussparungen der Schaumstoffschicht 43 bildet also eine Stürzstruktur. An der der Auflageschicht 21 abgewandten Seite der ersten CFK-Schicht 42 ist eine GFK-Schicht 41 angeordnet. Diese GFK-Schicht 41 kann eine Verschleißschicht 43 sein, die die erste CFK-Schicht 42 vor einer Abnutzung schützt. Es ist möglich, die GFK-Schicht im Zuge der Herstellung des Kerns 40 mit diesem zu verkleben.Another embodiment is from the Fig. 6 out. The core 40 is multilayered in this example and connected via a rubber layer 47 as a connecting layer with the support layer 21. The core 40 comprises a foam layer 43, wherein alternately the foam layer 43, a first CFK layer 42 and a second CFK layer 44 are arranged. The foam layer 43, the first CFRP layer 42 and the second CFRP layer 44 are glued together via a synthetic resin. Preferably, the foam layer 43 has honeycomb-shaped recesses that allow the cured resin to make an immediate bond between the first CFRP layer 42 and the second CFRP layer 44. In this respect, the foam layer 43 sheathed by the CFK layers 42, 44 is particularly well suited for picking up vertical loads without causing compression of the core 40. The cured resin in the recesses of the foam layer 43 thus forms a Stürz structure. On the side facing away from the support layer 21 of the first CFRP layer 42, a GRP layer 41 is arranged. This GRP layer 41 may be a wear layer 43, which is the protects first CFK layer 42 from wear. It is possible to bond the GRP layer in the course of the production of the core 40 with this.

Die CFK-Schicht 42 kann ein erstes Netz aus Glasfasern und die erste CFK-Schicht 42 ein zweites Netz aus Kunststofffasern aufweisen, wobei die Fasern des ersten Netzes in einem 45 Grad-Winkel zu den Fasern des zweiten Netzes angeordnet sind. Insgesamt könnte sich daher folgender Aufbau ergeben: +45/-45 Grad GFK-Schicht, 0/90 Grad CFK-Schicht, Schaumstoffkern (z.B. Rohacell), 0/90 Grad CFK-Schicht.The CFRP layer 42 may comprise a first network of glass fibers and the first CFRP layer 42 a second network of plastic fibers with the fibers of the first network disposed at a 45 degree angle to the fibers of the second network. Overall, therefore, the following structure could result: + 45 / -45 degrees GRP layer, 0/90 degree CFRP layer, foam core (e.g., Rohacell), 0/90 degree CFRP layer.

Die erste CFK-Schicht 42 kann beispielsweise eine Dicke von 0,2 mm bis 0,6 mm, insbesondere 0,4 mm haben. Die Schaumstoffschicht 43 kann eine Dicke von 1,0 bis 8,0 mm, insbesondere von 1,8 bis 6,0 mm haben. Die zweite CFK-Schicht 44 kann ähnliche oder identische Dickenverhältnisse haben wie die erste CFK-Schicht 42. Die Auflageschicht 21 hat im gezeigten Ausführungsbeispiel eine Dicke von 1,0 bis 1,5 mm und besteht aus 2024 T3.The first CFRP layer 42 may, for example, have a thickness of 0.2 mm to 0.6 mm, in particular 0.4 mm. The foam layer 43 may have a thickness of 1.0 to 8.0 mm, in particular from 1.8 to 6.0 mm. The second CFRP layer 44 may have similar or identical thickness ratios as the first CFRP layer 42. The overlay layer 21 in the embodiment shown has a thickness of 1.0 to 1.5 mm and consists of 2024 T3.

In einem Ausführungsbeispiel wird auf beiden Seiten eines Kerns, z. B. eines Kerns 40, wie dieser vorab beschrieben wurde, eine Metallschicht, z. B. aus Aluminium, angeordnet. Die Verbindung zwischen den Schichten kann durch ein Verkleben und/oder ein Aufvulkanisieren erfolgen. Diese Sandwichanordnung hat den Vorteil, dass sich die Bodenplatte 20 bei Temperaturschwankungen nur geringfügig verformt. Auch der Herstellungsprozess ist einfach, da die Auflageschicht 21 und die Verschleißschicht 23 aus Metall bzw. aus einer Metalllegierung in einem Fertigungsschritt mit dem Kern 40 verbunden, z. B. verklebt, werden können. In einem Ausführungsbeispiel kann das Verbinden der Schichten unter Temperatur (z. B. größer 20°, größer 30°, größer 40°) erfolgen.In one embodiment, on both sides of a core, e.g. B. a core 40, as described above, a metal layer, for. B. aluminum, arranged. The connection between the layers can be done by gluing and / or vulcanization. This sandwich arrangement has the advantage that the base plate 20 deforms only slightly with temperature fluctuations. Also, the manufacturing process is simple, since the support layer 21 and the wear layer 23 of metal or a metal alloy in a manufacturing step connected to the core 40, z. B. glued, can be. In one embodiment, the bonding of the layers may be carried out under temperature (eg greater than 20 °, greater than 30 °, greater than 40 °).

Vorhergehend wurde die Ausgestaltung des Frachtcontainers und der darin verwendeten Bodenplatte 20 beschrieben. Anmeldungsgemäß soll auch ein Verfahren zur Herstellung einer entsprechenden Bodenplatte 20 oder eines Frachtcontainerbodens sowie ein Herstellungsverfahren zur Herstellung eines Frachtcontainers 10 erfasst werden. Erfindungsgemäß ein Verfahren zur Herstellung eines Frachtcontainerbodens die folgenden Schritte :

  • Herstellen der Kernschicht 22 aus kohlenstoffverstärkten und/oder glasfaserverstärktem Kunststoff;
  • Herstellen einer Auflageschicht 21 aus einer Metalllegierung, insbesondere aus der bereits beschriebenen Aluminiumlegierung;
  • Verbinden der Auflageschicht 21 mit der Kernschicht 22 durch Stoffschluss und/oder Materialschluss.
The design of the freight container and the base plate 20 used therein has been described above. According to the application, a method for producing a corresponding base plate 20 or a cargo container floor as well as a production method for producing a freight container 10 should also be recorded. According to the invention, a method for producing a freight container floor comprises the following steps:
  • Producing the core layer 22 of carbon-reinforced and / or glass-fiber reinforced plastic;
  • Producing a support layer 21 from a metal alloy, in particular from the already described aluminum alloy;
  • Connecting the support layer 21 with the core layer 22 by material bond and / or material connection.

Die genannten Herstellungsschritte können vor dem Verbinden der Schichten erfolgen. Theoretisch ist es jedoch auch denkbar, eine der Schichten zuerst herzustellen und dann die weitere Schicht auf dieser Grundschicht aufzubauen. Beispielsweise kann die Aluminiumlegierung die Grundschicht bilden, auf der die Kernschicht 22 mit der Kohlenstoffverstärkung und/oder Glasfaserverstärkung und/oder Aramidfaserverstärkung sukzessiv hergestellt wird.The production steps mentioned can be carried out before joining the layers. Theoretically, however, it is also conceivable to produce one of the layers first and then to build up the further layer on this base layer. For example, the aluminum alloy may form the base layer on which the core layer 22 with the carbon reinforcement and / or glass fiber reinforcement and / or aramid fiber reinforcement is produced successively.

Des Weiteren kann bei dem erfindungsgemäßen Verfahren eine Verschleißschicht 23 angebracht werden. Auch hier ist es möglich, erst die Auflageschicht 21, die Kernschicht 22 und die Verschleißschicht 23 herzustellen und dann eine stoffschlüssige Verbindung zwischen den einzelnen Schichten herzustellen. Alternativ können die Auflageschicht 21 und die Verschleißschicht 23 hergestellt und die Kernschicht 22 sukzessiv auf der Auflageschicht 21 und/oder der Verschleißschicht 23 aufgebaut werden. Der Verbundwerkstoff kann dann durch ein Zusammenfügen der Auflageschicht 21 mit oder ohne Kernschicht 22 und der Verschleißschicht 23 mit oder ohne Kernschicht 22 erfolgen.Furthermore, in the method according to the invention, a wear layer 23 can be applied. Again, it is possible to first make the support layer 21, the core layer 22 and the wear layer 23 and then produce a material connection between the individual layers. Alternatively, the overlay layer 21 and the wear layer 23 may be formed and the core layer 22 successively built up on the overlay layer 21 and / or the wear layer 23. The composite may then be made by joining the overlay layer 21 with or without the core layer 22 and the wear layer 23 with or without the core layer 22.

Für den hier tätigen Fachmann sollte es offensichtlich sein, dass es zahlreiche alternative Ausführungsformen für das Herstellungsverfahren gibt. Ebenso sollte es für den hier tätigen Fachmann leicht ersichtlich sein, wie sich ein erfindungsgemäßer Frachtcontainer 10 herstellen lässt. Des Weiteren sollte der Fachmann wissen, wie man den erfindungsgemäßen Frachtboden als Teil einer Frachtpalette herstellt.It should be apparent to those skilled in the art that there are numerous alternative embodiments to the manufacturing process. Likewise, it should be easy for the person working here to see how an inventive freight container 10 can be produced. Furthermore, one skilled in the art should know how to make the cargo floor of the invention as part of a cargo pallet.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

1010
Frachtcontainercargo container
12a bis 12d12a to 12d
SeitenwandSide wall
1313
Deckelplattecover plate
1414
RFID-TagRFID tag
2020
Bodenplattebaseplate
2121
Auflageschichtcladding layer
2323
Verschleißschichtwearing course
2525
BodenplattenprofilBaseplate Profile
4040
Kerncore
4141
GFK-SchichtFRP sheet
4242
CFK-SchichtCFRP layer
4343
Schaumstoffschichtfoam layer
4444
CFK-SchichtCFRP layer
4747
Gummischichtrubber layer
hH
FrachtcontainerhöheCargo container height
bb
FrachtcontainerbreiteFreight container width
ll
FrachtcontainerlängeCargo Container Length
h1h1
AuflageschichtdickePad thickness
h2h2
KernschichtdickeCore layer thickness
h3h3
VerschleißschichtdickeWear layer thickness

Claims (18)

  1. Freight floor, comprising:
    - a first core layer and a second core layer (42, 43, 44) of carbon fibre reinforced and/or glass fibre reinforced and/or aramid fibre reinforced plastic material, and
    - a bearing layer (21) of metal alloy, wherein one of the core layers (42, 43, 44) and the bearing layer (21) are interconnected by adhesive joining and/or form fitting,
    characterized by
    a third core layer including a foam layer (43) having a support structure of synthetic resin extending vertically to the freight floor and firmly interconnecting the first and second core layers adjoining the foam layer, wherein the freight floor (20) comprises an at least in sections circumferential edge profile (25) in the form of a bead, wherein the bead serves the purpose of connecting the freight floor (20) to side walls (12a - 12d).
  2. Freight floor according to claim 1,
    characterized by
    a core (40) comprising at least a first core layer (42, 43, 44) having at least a first fibre orientation, and at least a second core layer (42, 43, 44) having at least a second fibre orientation, wherein the first fibre orientation preferably differs by at least 20 degrees or at least 30 degrees or at least 40 degrees or at least 45 degrees or at least 90 degrees from the second fibre orientation.
  3. Freight floor according to any one of the preceding claims,
    characterized in that
    the at least one core layer (42, 43, 44) comprises a fibre network of carbon fibres and/or glass fibres and/or aramid fibres, wherein preferentially a first plurality of carbon fibres/glass fibres/aramid fibres runs substantially at right angles to a second plurality of carbon fibres/glass fibres/aramid fibres.
  4. Freight floor according to any one of the preceding claims,
    characterized in that
    the foam layer (43) comprises a honeycomb-shaped support structure.
  5. Freight floor according to any one of the preceding claims,
    characterized in that
    the foam layer (43) is embedded between the first core layer (42) and the second core layer (44), wherein the layers are interconnected by adhesive joining.
  6. Freight floor according to any one of the preceding claims,
    characterized in that
    at least one core layer (42, 43, 44) comprises a connecting layer (47) at a side facing the bearing layer (21), viz. a connecting layer (47) from the group of elastomers, for connecting to the bearing layer (21).
  7. Freight floor according to claim 6,
    characterized in that
    the connecting layer (47) is joined to the core layer (42, 43, 44) and/or the bearing layer (21) by adhesive joining, viz. by vulcanisation.
  8. Freight floor according to any one of the preceding claims,
    characterized in that
    the bearing layer (21) exhibits a thickness (h1) of from 0.5 mm to 2.5 mm.
  9. Freight floor according to any one of the preceding claims,
    characterized in that
    the bearing layer (21) exhibits a strength of more than 300 N/mm2.
  10. Freight floor according to any one of the preceding claims,
    characterized by
    a wearing layer (23) or cover layer being arranged at a side of at least one core layer (42, 43, 44) facing away from the bearing layer (21), wherein the wearing layer (23) and the core layer (42, 43, 44) are connected by adhesive joining and/or form fitting.
  11. Freight floor according to claim 10,
    characterized in that
    the wearing layer (23) is formed of a metal alloy, viz. an aluminium alloy and/or a glass-fibre reinforced plastic material and/or a material from the group of aromatic polyamides.
  12. Freight floor according to any one of the preceding claims,
    characterized in that
    at least one of the aluminum alloys is a wrought aluminum alloy with the main alloy element being copper, viz. having 0.5 to 9% copper.
  13. Freight floor according to any one of the preceding claims,
    characterized in that
    at least one of the aluminium alloys is an aluminium alloy with a solution-annealed and/or artificially aged and/or overaged heat treatment.
  14. Freight container comprising a freight floor according to any one of the preceding claims and side walls (12a - 12d) disposed on the freight floor (20).
  15. Freight container according to claim 14,
    characterized in that
    the edge profile (25) is inserted in container corner profiles in order to connect the freight floor to the side walls (12a - 12d).
  16. Freight container according to claim 14,
    characterized in that
    the side walls (12a - 12d) are manufactured from glass fibre reinforced and/or carbon fibre reinforced plastic material at least in sections.
  17. Method for producing a freight floor, comprising the steps of:
    - producing a core (40) having a first, a second, and a third core layer (42, 43, 44),
    wherein the first and the second core layers (42, 43, 44) are produced from carbon fibre reinforced and/or glass fibre reinforced plastic material,
    wherein the third core layer comprises a foam layer (43) having a support structure of synthetic resin vertically extending to the freight floor and firmly interconnecting the first and second core layers adjoining the foam layer,
    wherein the freight floor comprises an edge profile (25) in the form of a bead extending along the circumference at least in sections, wherein the bead serves the purpose of connecting the freight floor (20) to side walls (12a - 12d);
    - producing a bearing layer (21) from a metal alloy;
    - connecting the bearing layer (21) to the core layer (42, 43, 44) by adhesive joining while using an adhesive.
  18. Method according to claim 17,
    characterized in that
    the connecting is performed by applying and/or vulcanising a connecting layer from the group of elastomers.
EP12726115.4A 2011-06-07 2012-06-06 Freight floor, freight container, method for producing a freight floor Not-in-force EP2718203B1 (en)

Applications Claiming Priority (2)

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DE102011050893.7A DE102011050893B4 (en) 2011-06-07 2011-06-07 Freight container and method for producing a freight container
PCT/EP2012/060719 WO2012168310A1 (en) 2011-06-07 2012-06-06 Freight floor, freight container, use of a multi-layer panel to produce a freight floor, and method for producing a freight floor

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DE102011050893A1 (en) 2012-12-13
DE102011050893B4 (en) 2016-01-14
US9850063B2 (en) 2017-12-26
US20140097181A1 (en) 2014-04-10
HK1190681A1 (en) 2014-07-11
EP2718203A1 (en) 2014-04-16

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