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DE4238562A1 - Light sandwich plate - comprises two deck layers between which is core of vertically arranged plant stalks - Google Patents

Light sandwich plate - comprises two deck layers between which is core of vertically arranged plant stalks

Info

Publication number
DE4238562A1
DE4238562A1 DE4238562A DE4238562A DE4238562A1 DE 4238562 A1 DE4238562 A1 DE 4238562A1 DE 4238562 A DE4238562 A DE 4238562A DE 4238562 A DE4238562 A DE 4238562A DE 4238562 A1 DE4238562 A1 DE 4238562A1
Authority
DE
Germany
Prior art keywords
core
sandwich
sandwich plate
light sandwich
light
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.)
Ceased
Application number
DE4238562A
Other languages
German (de)
Inventor
Frank Dipl Ing Moeller
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE9114254U external-priority patent/DE9114254U1/en
Application filed by Individual filed Critical Individual
Priority to DE4238562A priority Critical patent/DE4238562A1/en
Publication of DE4238562A1 publication Critical patent/DE4238562A1/en
Ceased legal-status Critical Current

Links

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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/02—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising animal or vegetable substances, e.g. cork, bamboo, starch
    • 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
    • B32B3/18—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 an internal layer formed of separate pieces of material which are juxtaposed side-by-side
    • B32B3/20—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 an internal layer formed of separate pieces of material which are juxtaposed side-by-side of hollow pieces, e.g. tubes; of pieces with channels or cavities
    • 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
    • B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
    • B32B9/04—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B9/042—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising such particular substance as the main or only constituent of a layer, which is next to another layer of the same or of a different material of wood
    • 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
    • E04C2/02—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials
    • E04C2/10—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products
    • E04C2/16—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by specified materials of wood, fibres, chips, vegetable stems, or the like; of plastics; of foamed products of fibres, chips, vegetable stems, or the like
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Wood Science & Technology (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

The sandwich core is composed of parallel, hollow plant stalks (3) at right angles to the deck layers (1, 2) to which they are adhered. At least one of the deck layers is of plywood or veneer and the hollow plant stalks consist of straw. The plant stalks are tightly packed together and are stuck to one another. Additional materials can be incorporated with them, and the sandwich plate has a wt. of approximately 0.15 g/cm. The plate is arched. USE/ADVANTAGE - A sandwich plate suitable for use in air and space travel.

Description

Die Erfindung betrifft eine leichte Sandwichplatte mit zwei Decklagen und einem zwi­ schen diesen angeordneten Kern gemäß dem Oberbegriff des Hauptanspruches.The invention relates to a light sandwich panel with two cover layers and a zwi rule this arranged core according to the preamble of the main claim.

Sandwichkonstruktionen werden meistens in der Luft- und Raumfahrt eingesetzt. Übliche Werkstoffe für die Decklagen von Sandwichbauteilen sind dabei faserverstärkte Kunststoffe (GFK, CFK, AFK) Aluminium und Tropenhölzer. Für den Sandwichkern werden Kunststoffhartschäume, Aramidwabenkerne, Aluminiumwa­ benkerne, Tubuskerne aus Kunststoffen sowie Balsaholz eingesetzt. Sandwichkern und Decklagen werden meist mit Kunstharzen verklebt. Die leichtesten, bisher ver­ wendeten Sandwichkonstruktionen, bestehen aus Decklagen aus faserverstärkten Kunststoffen (Epoxidharzmatrix) und dazwischenliegenden phenolharzgetränkten Aramidwabenkernen ("Honeycomb"). Hierzu kommen verschiedene Verstärkungsgewebe wie Glas-, Aramid- und Kohlefaser. In der Fahrzeug- und Kli­ matechnik überwiegt die Vollkunststoffsandwichbauweise mit Deckschichten aus faserverstärkten Kunststoffen und Hartschaumkernen. Als Kernstoff dienen PVC, PE, PUR, PMI und PMI- Hartschäume. Diese hochvernetzten Hartschäume werden in Blöcken geschäumt und anschließend zu plattenförmigen Kernstoffen zersägt. Als Decklagenwerkstoffe werden in der Regel glasfaserverstärkte Kunststoffe mit Epoxid- oder Polyesterharzmatrix verwendet. Die Harzsysteme sind sowohl kalt als auch warm aushärtend. Die Verklebung des Kernschaumes mit dem Decklagenwerkstoff erfolgt unter Druck und bei warmaushärtenden Harzsystemen zusätzlich mit Tempe­ ratur (Tarann und Budesku, 1981, und Yang und Chenn, 1991).Sandwich constructions are mostly used in the aerospace industry. Common materials for the top layers of sandwich components are included fiber-reinforced plastics (GFK, CFK, AFK) aluminum and tropical woods. For the Sandwich core are hard plastic foams, aramid honeycomb cores, aluminum wa core, plastic tube core and balsa wood. Sandwich core and top layers are mostly glued with synthetic resins. The lightest, so far ver sandwich constructions, consist of top layers made of fiber-reinforced  Plastics (epoxy resin matrix) and phenolic resin soaked in between Aramid honeycomb cores ("Honeycomb"). There are various Reinforcing fabrics such as glass, aramid and carbon fiber. In the vehicle and Kli matechnik outweighs the all-plastic sandwich construction with cover layers fiber-reinforced plastics and rigid foam cores. PVC, PE, PUR, PMI and PMI rigid foams. These highly crosslinked rigid foams are made in Blocks foamed and then sawn into plate-shaped core materials. As Top layer materials are usually glass fiber reinforced plastics with epoxy or polyester resin matrix used. The resin systems are both cold as well thermosetting. Bonding the core foam to the top layer material takes place under pressure and in the case of thermosetting resin systems also with Tempe ratur (Tarann and Budesku, 1981, and Yang and Chenn, 1991).

Alle diese Stoffe verbrauchen bei ihrer Produktion erhebliche Energiemengen und setzen bei der Verarbeitung Schadstoffe frei. Die Entsorgung derartiger Bauteile nach Gebrauch ist ebenfalls problematisch, ein Recycling ist nicht möglich. Ein großer an­ wendungstechnischer Nachteil bei Sandwichbauteilen mit Kunststoff- oder Alumini­ umdeckschichten besteht außerdem in der geringen Druckfestigkeit der Sandwichplatte bei punktueller, rechtwinklig zur Plattenoberfläche wirkenden Druck­ kraft. Die aus Gewichtsgründen dünn gehaltenen Deckschichten können leicht eingedrückt werden. Bei der im Bootsbau üblichen Tropenholzsandwichbauweise werden zum Verkleben und Versiegeln des Balsaholzkernes erhebliche Mengen Epo­ xidharz verwendet. Auch hier sind Verarbeitung und Entsorgung problematisch und wenig umweltverträglich.All of these substances consume considerable amounts of energy and energy in their production release pollutants during processing. The disposal of such components after Use is also problematic, recycling is not possible. A big one Application disadvantage in sandwich components with plastic or aluminum Cover layers also exist in the low compressive strength of the Sandwich plate at selective pressure, acting perpendicular to the plate surface force. The cover layers, which are kept thin for reasons of weight, can be light be pushed in. With the tropical wood sandwich construction common in boat building become significant amounts of Epo for gluing and sealing the balsa wood core xid resin used. Processing and disposal are problematic here too little environmentally friendly.

Aus der DE-OS 31 00 094 ist ein Sandwichbauelement bekannt mit zwei aus Metall, Sperrholz oder faserverstärkten Werkstoffen bestehenden Deckschichten. Dazwi­ schen ist ein Stützkern aus Balsaholz-Klötzchen angeordnet. Die Balsaholzklötzchen sind quader- oder würfelförmig ausgebildet, um sich leicht dem Biegeradius des gewölbten Sandwichbauelementes anpassen zu können. DE-OS 31 00 094 discloses a sandwich component with two made of metal, Plywood or fiber-reinforced materials. Dazwi a support core made of balsa blocks is arranged. The balsa wood blocks are cuboid or cube-shaped to easily match the bending radius of the to be able to adapt curved sandwich component.  

Daneben ist aus der DE-PS 30 35 323 ein Bauelement aus mehreren Schichten versetzter und miteinander verleimter breiter Streifen aus pflanzlichem Material be­ kannt. Die pflanzlichen Schichten bestehen aus durchgehenden Bambusstreifen, wobei die Streifen einer Schicht parallel zueinander angeordnet sind und die Streifen benachbarter Schichten in einem vorgegebenen Winkel zueinander verlaufen. Durch diese Anordnung der Streifen wird eine Erhöhung der möglichen aufzunehmenden Kräfte angestrebt.In addition, DE-PS 30 35 323 is a component made of several layers staggered and glued together wide strips of vegetable material knows. The vegetable layers consist of continuous bamboo strips, the strips of a layer being arranged parallel to one another and the strips neighboring layers run at a predetermined angle to each other. By this arrangement of the strips will increase the potential for inclusion Forces sought.

Aus der DE 37 20 371 C2 ist eine für Innenverkleidungen von Flugzeugen bestimmte Sandwichbauplatte beschrieben. Dabei befindet sich zwischen zwei Deckschichten ein Wabenkern mit einer Schaumstoffüllung. Die Deckschichten bestehen, wie der Wabenkern, aus faserverstärktem Kunststoff. Die Schaumstoffüllung besteht aus Me­ laminschaum.DE 37 20 371 C2 describes one for aircraft interior linings Sandwich construction board described. It is located between two cover layers a honeycomb core with a foam filling. The cover layers exist like that Honeycomb core, made of fiber-reinforced plastic. The foam filling consists of me laminated foam.

Aufgabe der vorliegenden Erfindung ist es, eine leichte, besonders kostengünstige Sandwichplatte anzugeben, welche gegenüber herkömmlichen Sandwichplatten erhöhte Festigkeitseigenschaften aufweist, besonders leicht ist und gleichzeitig eine umweltfreundliche Herstellung und Entsorgung erlaubt.The object of the present invention is a light, particularly cost-effective Specify sandwich panel, which compared to conventional sandwich panels has increased strength properties, is particularly light and at the same time a environmentally friendly production and disposal permitted.

Diese Aufgabe ist durch den im Anspruch 1 angegebenen Gegenstand gelöst. Unteransprüche stellen vorteilhafte Weiterbildungen dar.This object is achieved by the subject matter specified in claim 1. Subclaims represent advantageous developments.

Die erfindungsgemäße leichte Sandwichplatte besteht aus zwei Decklagen, zwischen denen sich ein durch parallel zueinander und rechtwinklig zu den Decklagen angeord­ nete hohle Pflanzenstiele gebildeter Kern befindet. Da der Kern aus einem Naturpro­ dukt besteht, treten bei der Entsorgung derartiger Platten, vorausgesetzt, daß die Decklagen ebenfalls aus Naturstoffen bestehen, keine Entsorgungsprobleme auf. Die Entsorgung derartiger Sandwichplatten ist umweltfreundlich. Durch die Anordnung von hohlen Pflanzenstielen derart, daß sie senkrecht auf die beiden Decklagen ste­ hen, ist die Festigkeit der hohlen Pflanzenstiele optimal ausgenutzt und eine derartige Platte ist praktisch nicht zusammendrückbar. Die erfindungsgemäße leichte Sand­ wichplatte weist eine hohe Biegefestigkeit, Biegesteifigkeit und Druckfestigkeit auf. Die hohe Druckfestigkeit ist durch die in Faserrichtung wirkende Kraft der sich gegen­ seitig stützenden Stiele erreicht. Außerdem können durch den leichten Kern bei glei­ chem Gesamtgewicht dickere Decklagen eingesetzt werden. Sind außerdem als Decklagen Holz bzw. Holzwerkstoffe vorgesehen, so sind diese, verglichen mit Kunststoffdecklagen, wesentlich leichter. Dadurch können sie auch eine entspre­ chend höhere Dicke aufweisen, was, wie oben bereits ausgeführt, zur Steigerung der Festigkeit der gesamten Platte beiträgt.The light sandwich panel according to the invention consists of two cover layers, between which are arranged through parallel to each other and at right angles to the top layers Nete hollow plant stems formed core. Since the core of a natural pro product exists, occur when disposing of such plates, provided that the Cover layers also consist of natural materials, no disposal problems. The Disposing of such sandwich panels is environmentally friendly. By the arrangement of hollow plant stems in such a way that they stand perpendicular to the two cover layers hen, the strength of the hollow plant stems is optimally used and such The plate is practically not compressible. The light sand according to the invention wichplatte has a high bending strength, bending stiffness and compressive strength.  The high compressive strength is due to the force acting in the fiber direction mutually supporting stems reached. In addition, the light core at glei chem total weight thicker cover layers are used. Are also as Cover layers of wood or wood-based materials are provided, these are compared to Plastic top layers, much lighter. This means that you can also have a match have correspondingly greater thickness, which, as already stated above, to increase the Strength of the entire plate contributes.

Damit die einzelnen Pflanzenstiele, welche entweder dicht gepackt oder mit Abständen zueinander zwischen den Decklagen angeordnet sein können, mit den Decklagen fest verbunden bleiben, werden sie zweckmäßigerweise mit den Deckla­ gen verklebt. Dabei ist eine Beleimung nur an der Berührungsfläche zu den Deckla­ gen notwendig: Durch die Kapillarwirkung zieht sich das Klebematerial an den Zellwänden hoch, so daß sich eine Kehlnaht ausbildet und so zusätzlich die Positio­ nierung der einzelnen Pflanzenstiele verfestigt. Mit einer dichten Packung der Pflan­ zenstiele nimmt die Biegefestigkeit zu. Sind die Pflanzenstiele locker nebeneinander angeordnet, nimmt die Biegefestigkeit ab. Soll eine besonders hohe Biegefestigkeit der Sandwichplatte erreicht werden, so können die einzelnen Pflanzenstiele unterein­ ander über ihre gesamte Länge verklebt werden. Die Zugfestigkeit und die Steifigkeit der erfindungsgemäßen Platte ist jedoch von der Packungsdichte der einzelnen Pflanzenstiele unabhängig.So that the individual plant stems, which are either tightly packed or with Distances to each other between the cover layers can be arranged with the Cover layers remain firmly connected, they are conveniently with the Deckla gene glued. Gluing is only on the contact surface to the deckla necessary: Due to the capillary action, the adhesive material pulls on the Cell walls high, so that a fillet weld is formed and so the position nation of the individual plant stems solidified. With a dense pack of the plant zenstiele increases the bending strength. Are the plant stems loose next to each other arranged, the bending strength decreases. Should have a particularly high flexural strength the sandwich panel can be reached, so the individual plant stems can be one below the other be glued along their entire length. The tensile strength and rigidity However, the plate according to the invention is of the packing density of the individual Plant stems independent.

Vorteilhaft ist, wenn dem Sandwichkern noch andere, zusätzliche Materialien zuge­ geben werden. Dabei kann es sich um Flammschutzmittel, Insektizide oder festigkeitserhöhende Mittel handeln.It is advantageous if other additional materials are added to the sandwich core will give. These can be flame retardants, insecticides or act strengthening agents.

Es ist besonders vorteilhaft, wenn die Decklagen aus Holz oder Holzwerkstoff beste­ hen. Wie oben bereits erläutert, ist eine derartige Sandwichplatte ausschließlich aus Naturstoffen hergestellt, wodurch weder bei der Herstellung noch bei der Entsorgung umwelttechnische Probleme entstehen. Dabei ist es besonders günstig, wenn als Decklagen Sperrholz oder Holzfurniere verwendet werden. Diese Werkstoffe weisen hohe Festigkeit auf, so daß auch besonders dünne Decklagen eingesetzt werden können.It is particularly advantageous if the top layers are made of wood or wood-based material hen. As already explained above, such a sandwich panel is exclusively made of Natural products are manufactured, which means neither in the production nor in the disposal environmental problems arise. It is particularly advantageous if as Plywood or wood veneer top layers are used. These materials show  high strength, so that particularly thin cover layers can be used can.

Gemäß einer vorteilhaften Ausführungsform besteht der Kern der Sandwichplatte aus Stroh. Stroh weist auf sein Gewicht bezogen eine sehr hohe Festigkeit auf. Jedoch können gleichfalls Bambusstiele, Miskantusstiele, Papyrus und ähnliche Gräser oder grasähnliche Pflanzen verwendet werden. Selbstverständlich werden diese Pflanzen­ stiele in getrocknetem, d. h. steifem Zustand eingesetzt. Die Raumdichte einer derarti­ gen erfindungsgemäßen Sandwichplatte beträgt ca. 0,15 g/cm.According to an advantageous embodiment, the core of the sandwich panel consists of Straw. Based on its weight, straw is very strong. However can also bamboo stalks, Miskantus stalks, papyrus and similar grasses or grass-like plants can be used. Of course, these plants stems in dried, d. H. stiff condition used. The spatial density of such a gene sandwich plate according to the invention is about 0.15 g / cm.

Die erfindungsgemäße leichte Sandwichplatte kann auch eine gewölbte Form aufwei­ sen. Der Herstellungsprozeß einer solchen Platte ist genauso einfach wie der Her­ stellungsprozeß einer Platte mit einer flächigen Ausdehnung ohne räumliche Ausbildung.The light sandwich panel according to the invention can also have a curved shape sen. The manufacturing process of such a plate is as simple as the manufacture positioning process of a plate with a flat extension without spatial Training.

Die erfindungsgemäße leichte Sandwichplatte ist in den Zeichnungen dargestellt und anhand eines Ausführungsbeispiels näher erläutert.The light sandwich panel according to the invention is shown in the drawings and explained in more detail using an exemplary embodiment.

Es zeigen:Show it:

Fig. 1 eine schematische perspektivische Darstellung der leichten Sandwichplatte, teilweise aufgeschnitten. Fig. 1 is a schematic perspective view of the light sandwich panel, partially cut away.

Fig. 2 Detail Z in einer vergrößerten schematischen Darstellung. Fig. 2 detail Z in an enlarged schematic representation.

Die leichte Sandwichplatte weist eine obere Deckschicht 1, eine untere Deckschicht 2 und einen dazwischen angeordneten, durch parallel zueinander und senkrecht auf die beiden Deckschichten 1, 2 stehende angeordnete Gräserstiele 3 gebildeten Kern auf. Die obere und die untere Deckschicht 1, 2 bestehen aus Holz. Die hohlen Gräserstiele 3 sind rechtwinklig zu den beiden Deckschichten 1, 2 angeordnet. Die Gräserstiele 3 sind dicht gepackt. Sie sind durch Kleben mit den Decklagen 1, 2 ver­ bunden. Eine Klebeschicht 4 wurde auf die obere und die untere Decklage 1, 2 aufge­ tragen. Der Fig. 2 ist entnehmbar, wie sich der Kleber 4 in die Räume zwischen den einzelnen Gräserstielen 3 einzieht, so daß nicht nur eine Verbindung der Gräserstiele 3 zu den Decklagen 1, 2, sondern auch eine zusätzliche Positionierung der einzelnen Gräserstiele in ihrer senkrechten Lage zu den Deckschichten 1, 2 entsteht.The light sandwich panel has an upper cover layer 1 , a lower cover layer 2 and a core arranged in between, formed by grass stems 3 formed parallel to one another and perpendicular to the two cover layers 1 , 2 . The upper and lower cover layers 1 , 2 are made of wood. The hollow grass stems 3 are arranged at right angles to the two cover layers 1 , 2 . The grass stems 3 are tightly packed. They are connected by gluing to the cover layers 1 , 2 . An adhesive layer 4 was applied to the upper and lower cover layers 1, 2 . Fig. 2 can be seen how the adhesive 4 moves into the spaces between the individual grass stems 3 , so that not only a connection of the grass stems 3 to the cover layers 1 , 2 , but also an additional positioning of the individual grass stems in their vertical position to the cover layers 1 , 2 arises.

Claims (12)

1. Leichte Sandwichplatte mit zwei Decklagen und einem Sandwichkern, wobei der Sandwichkern zwischen den Decklagen angeordnet und mit diesen fest verbunden ist, dadurch gekennzeichnet, daß der Sandwichkern durch parallel zueinander und rechtwinklig zu den Decklagen (1, 2) angeordnete hohle Pflanzenstiele (3) ge­ bildet ist.1. Light sandwich plate with two cover layers and a sandwich core, the sandwich core being arranged between the cover layers and firmly connected to them, characterized in that the sandwich core is arranged by hollow plant stems ( 3 ) arranged parallel to one another and at right angles to the cover layers ( 1, 2 ). is formed. 2. Leichte Sandwichplatte nach Anspruch 1, dadurch gekennzeichnet, daß die Decklagen (1, 2) mit den hohlen Pflanzenstielen (3) verklebt sind.2. Light sandwich panel according to claim 1, characterized in that the cover layers ( 1, 2 ) are glued to the hollow plant stems ( 3 ). 3. Leichte Sandwichplatte nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß mindestens eine Decklage (1, 2) aus Holz oder Holzwerkstoff besteht.3. Light sandwich panel according to claim 1 or 2, characterized in that at least one cover layer ( 1, 2 ) consists of wood or wood-based material. 4. Leichte Sandwichplatte nach Anspruch 3, dadurch gekennzeichnet, daß der Holzwerkstoff Sperrholz ist.4. Light sandwich plate according to claim 3, characterized in that the Wood material is plywood. 5. Leichte Sandwichplatte nach Anspruch 3, dadurch gekennzeichnet, daß der Holzwerkstoff Holzfurnier ist. 5. Light sandwich plate according to claim 3, characterized in that the Wood material is wood veneer.   6. Leichte Sandwichplatte nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die hohlen Pflanzenstiele (3) Stroh sind.6. Light sandwich plate according to one of the preceding claims, characterized in that the hollow plant stems ( 3 ) are straw. 7. Leichte Sandwichplatte nach einem der vorangegangenen Ansprüche, dadurch ge­ kennzeichnet, daß die Pflanzenstiele (3) nebeneinander dicht gepackt sind.7. Light sandwich plate according to one of the preceding claims, characterized in that the plant stems ( 3 ) are packed tightly next to each other. 8. Leichte Sandwichplatte nach Anspruch 7, dadurch gekennzeichnet, daß die Pflanzenstiele (3) miteinander verklebt sind.8. Light sandwich panel according to claim 7, characterized in that the plant stems ( 3 ) are glued together. 9. Leichte Sandwichplatte nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß dem aus Pflanzenstielen (3) bestehenden Sandwichkern zusätzlich andere Materialien zugegeben sind.9. Light sandwich panel according to one of the preceding claims, characterized in that the sandwich core consisting of plant stems ( 3 ) are additionally added other materials. 10. Leichte Sandwichplatte nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß die Sandwichplatte gewölbt ist.10. Light sandwich plate according to one of the preceding claims, characterized characterized in that the sandwich plate is curved. 11. Leichte Sandwichplatte nach einem der vorangegangenen Ansprüche, dadurch gekennzeichnet, daß ihr Raumgewicht etwa 0,15 g/cm beträgt.11. Light sandwich plate according to one of the preceding claims, characterized characterized in that their density is about 0.15 g / cm. 12. Verwendung von hohlen Pflanzenstielen zur Herstellung einer leichten Sandwich­ platte, bei der die hohlen Pflanzenstiele parallel zueinander angeordnet senkrecht auf die Decklagen stehen.12. Use hollow plant stems to make a light sandwich plate, in which the hollow plant stems are arranged parallel to each other vertically stand on the top layers.
DE4238562A 1991-11-15 1992-11-14 Light sandwich plate - comprises two deck layers between which is core of vertically arranged plant stalks Ceased DE4238562A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE4238562A DE4238562A1 (en) 1991-11-15 1992-11-14 Light sandwich plate - comprises two deck layers between which is core of vertically arranged plant stalks

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE9114254U DE9114254U1 (en) 1991-11-15 1991-11-15 Lightweight natural material sandwich panel
DE4238562A DE4238562A1 (en) 1991-11-15 1992-11-14 Light sandwich plate - comprises two deck layers between which is core of vertically arranged plant stalks

Publications (1)

Publication Number Publication Date
DE4238562A1 true DE4238562A1 (en) 1993-05-27

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DE4238562A Ceased DE4238562A1 (en) 1991-11-15 1992-11-14 Light sandwich plate - comprises two deck layers between which is core of vertically arranged plant stalks

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2801066A1 (en) * 1999-11-12 2001-05-18 Schreinerei Schneider Ag FIRE RESISTANT SANDWICH PANEL
WO2004113170A1 (en) * 2003-06-19 2004-12-29 Mohammad Anayet Rubby Ahad Satellite launch apparatus
FR2914582A1 (en) * 2007-04-06 2008-10-10 Jean-Michel Domin Composite slab for e.g. building field, has space grid provided with tubular elements that are in contact and fixed to each other by their walls, where elements are arranged between cover plates that are fixed on end sectors of elements
DE102008007516A1 (en) 2008-02-05 2009-08-06 Genima Innovations Marketing Gmbh Core structure for the construction of multilayer plates or shells
DE102008032285A1 (en) 2008-07-09 2010-01-14 Christian Reder Three-dimensional object, particularly art object, is made of regenerating raw material, where regenerating raw material hollow column is provided as plant
CN107848240A (en) * 2015-08-04 2018-03-27 基于竹木材料的轻量级工业应用有限责任公司 Web, sandwich plate, interlayer block and its production method
WO2023060102A1 (en) * 2021-10-07 2023-04-13 ORB Technologies, LLC System, apparatus, and method for providing a plant-based structural assembly

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FR2271044A1 (en) * 1973-11-05 1975-12-12 Bertin & Cie Cellular wall or floor panel - has hollow cylindrical vegetable bodies glued to sheets at ends only
DE2836418A1 (en) * 1978-08-19 1980-02-28 Helmut Dipl Phys Nussbaum Sandwich structure semi-finished constructional material - comprises tubes of fibrous material impregnated with synthetic resin and glued together
DE3737116A1 (en) * 1987-11-02 1989-05-11 Hans Georg Urbschat Decorative and image-bearing objects made of honeycomb sandwich core layers

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2336700A1 (en) * 1973-07-19 1975-02-06 Ferma Structural plates formed by spaced cover plates - interconnected by tubular distance pieces with voids filled with foamed plastics
FR2271044A1 (en) * 1973-11-05 1975-12-12 Bertin & Cie Cellular wall or floor panel - has hollow cylindrical vegetable bodies glued to sheets at ends only
DE2836418A1 (en) * 1978-08-19 1980-02-28 Helmut Dipl Phys Nussbaum Sandwich structure semi-finished constructional material - comprises tubes of fibrous material impregnated with synthetic resin and glued together
DE3737116A1 (en) * 1987-11-02 1989-05-11 Hans Georg Urbschat Decorative and image-bearing objects made of honeycomb sandwich core layers

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2801066A1 (en) * 1999-11-12 2001-05-18 Schreinerei Schneider Ag FIRE RESISTANT SANDWICH PANEL
WO2004113170A1 (en) * 2003-06-19 2004-12-29 Mohammad Anayet Rubby Ahad Satellite launch apparatus
FR2914582A1 (en) * 2007-04-06 2008-10-10 Jean-Michel Domin Composite slab for e.g. building field, has space grid provided with tubular elements that are in contact and fixed to each other by their walls, where elements are arranged between cover plates that are fixed on end sectors of elements
DE102008007516A1 (en) 2008-02-05 2009-08-06 Genima Innovations Marketing Gmbh Core structure for the construction of multilayer plates or shells
DE102008032285A1 (en) 2008-07-09 2010-01-14 Christian Reder Three-dimensional object, particularly art object, is made of regenerating raw material, where regenerating raw material hollow column is provided as plant
CN107848240A (en) * 2015-08-04 2018-03-27 基于竹木材料的轻量级工业应用有限责任公司 Web, sandwich plate, interlayer block and its production method
WO2023060102A1 (en) * 2021-10-07 2023-04-13 ORB Technologies, LLC System, apparatus, and method for providing a plant-based structural assembly
US11661740B2 (en) 2021-10-07 2023-05-30 ORB Technologies, LLC System, apparatus, and method for providing a plant-based structural assembly
US12031330B2 (en) 2021-10-07 2024-07-09 ORB Technologies, LLC System, apparatus, and method for providing a plant-based structural assembly

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