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WO1993009947A1 - Panneau sandwich leger - Google Patents

Panneau sandwich leger Download PDF

Info

Publication number
WO1993009947A1
WO1993009947A1 PCT/DE1992/000953 DE9200953W WO9309947A1 WO 1993009947 A1 WO1993009947 A1 WO 1993009947A1 DE 9200953 W DE9200953 W DE 9200953W WO 9309947 A1 WO9309947 A1 WO 9309947A1
Authority
WO
WIPO (PCT)
Prior art keywords
cover layers
sandwich
light
core
light sandwich
Prior art date
Application number
PCT/DE1992/000953
Other languages
German (de)
English (en)
Inventor
Frank Möller
Original Assignee
Moeller Frank
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Moeller Frank filed Critical Moeller Frank
Publication of WO1993009947A1 publication Critical patent/WO1993009947A1/fr

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
    • 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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/04—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B21/042—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood 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
    • 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
    • B32B21/00—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board
    • B32B21/14—Layered products comprising a layer of wood, e.g. wood board, veneer, wood particle board comprising wood board or veneer
    • 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
    • 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
    • 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
    • E04C2/24—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 laminated and composed of materials covered by two or more of groups E04C2/12, E04C2/16, E04C2/20
    • 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
    • B32B2317/00—Animal or vegetable based

Definitions

  • the invention relates to a light sandwich panel with two cover layers and a core arranged between them according to the preamble of the main claim.
  • Sandwich constructions are mostly used in the aerospace industry. Common materials for the top layers of sandwich components are fiber-reinforced plastics (GFK, CFK, AFK) aluminum and tropical woods. Plastic hard foams, aramid honeycomb cores, aluminum honeycomb cores, plastic tube cores and balsa wood are used for the sandwich core. Sandwich core and top layers are mostly glued with synthetic resins.
  • the lightest sandwich constructions used so far consist of cover layers made of fiber-reinforced Plastics (epoxy resin matrix) and phenolic resin-soaked aramid honeycomb core (“Honeycomb") in between. There are also various reinforcement fabrics such as glass, aramid and carbon fibers.
  • the all-plastic sandwich construction with outer layers made of fiber-reinforced plastics and rigid foam cores predominates.
  • PVC, PE, PUR, PM1 and PMI rigid foams are used as the core material.
  • These highly crosslinked rigid foams are foamed in blocks and then sawn into plate-shaped core materials.
  • Glass fiber reinforced plastics with an epoxy or polyester resin matrix are generally used as cover layer materials.
  • the resin systems are both cold and warm curing.
  • the core foam is bonded to the cover layer material under pressure and with thermosetting resin systems additionally with temperature (Tarann and Budesku, 1981, and Yang and Chenn, 1991).
  • DE OS 31 00094 discloses a sandwich component with two cover layers made of metal, plywood or fiber-reinforced materials.
  • a support core made of balsa wood blocks is arranged in between.
  • the balsa wood blocks are cuboid or cube-shaped in order to be able to easily adapt to the bending radius of the curved sandwich component.
  • DE PS 30 35 323 a component made of several layers of offset and glued together wide strips of vegetable material is known.
  • the vegetable layers consist of continuous bamboo strips, the strips of one layer being arranged parallel to one another and the strips of adjacent layers being at a predetermined angle to one another. This arrangement of the strips is aimed at increasing the possible forces to be absorbed.
  • DE 3720371 C2 describes a sandwich building board intended for the interior lining of aircraft.
  • a honeycomb core with a foam filling between two cover layers.
  • the cover layers are made of fiber-reinforced plastic.
  • the foam filling consists of melamine foam.
  • the object of the present invention is to provide a light, particularly inexpensive sandwich panel which has increased strength properties compared to conventional sandwich panels, is particularly light and at the same time permits environmentally friendly production and disposal.
  • the light sandwich panel according to the invention consists of two cover layers, between which there is a core formed by hollow plant stems arranged parallel to one another and at right angles to the cover layers. Since the core consists of a natural product, there are no disposal problems with the disposal of such panels, provided that the cover layers also consist of natural materials. The disposal of such sandwich panels is environmentally friendly.
  • the arrangement of hollow plant stems in such a way that they are perpendicular to the two cover layers means that the strength of the hollow plant stems is optimally utilized and such a plate is practically not compressible.
  • the light sandwich plate according to the invention has a high flexural strength, flexural strength and compressive strength. The high compressive strength is achieved by the force of the mutually supporting stems acting in the direction of the fibers.
  • cover layers can be used due to the light core with the same total weight. If wood or wood-based materials are also provided as cover layers, these are considerably lighter than plastic cover layers. As a result, they can also have a correspondingly greater thickness, which, as already explained above, contributes to increasing the strength of the entire plate.
  • the individual plant stalks which can either be packed tightly or spaced apart from one another between the cover layers, remain firmly connected to the cover layers, they are expediently glued to the cover layers.
  • gluing is only necessary on the contact surface with the cover layers: the capillary action causes the adhesive material to pull up on the cell walls, so that a fillet weld is formed and thus additionally strengthens the positioning of the individual armatures.
  • the flexural strength increases with a tight packing of the plant stems. If the plant stems are loosely arranged side by side, the bending strength decreases. If a particularly high bending strength of the sandwich panel is to be achieved, the individual plant stems can be glued to one another over their entire length.
  • the tensile strength and the rigidity of the plate according to the invention are independent of the packing density of the individual plant stems.
  • cover layers consist of wood or wood-based material.
  • a sandwich panel is made exclusively from natural materials, which means that neither environmental problems arise during manufacture nor during disposal.
  • plywood or wood veneer is used as the top layer. These materials show high strength, so that particularly thin cover layers can be used.
  • the core of the sandwich panel consists of straw. Straw has a very high strength in relation to its weight. However, bamboo stalks, Miskanthus stalks, papyrus and similar grasses or grass-like plants can also be used. Of course, these saucers are dried, i.e. stiff condition used.
  • the spatial density of such a sandwich panel according to the invention is approximately 0.15 g / cm.
  • the light sandwich plate according to the invention can also have a curved shape.
  • the manufacturing process of such a plate is just as simple as the manufacturing process of a plate with a two-dimensional expansion without spatial training.
  • the light sandwich panel according to the invention is shown in the drawings and explained in more detail using an exemplary embodiment.
  • Fig. 1 is a schematic perspective view of the light sandwich panel, partially cut away.
  • FIG. 2 detail Z in an enlarged schematic representation.
  • the light sandwich panel has an upper cover layer 1, a lower cover layer 2 and a core arranged between them, 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 to the cover layers 1, 2 by gluing.
  • An adhesive layer 4 was applied to the upper and lower cover layers 1, 2.
  • Fig. 2 can be seen how the adhesive 4 is drawn 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 perpendicular position to the cover layers 1, 2.

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

Panneau sandwich léger à deux couches extérieures (1, 2) et un noyau sandwich. Ce dernier est logé entre les couches extérieures (1, 2) auxquelles il est lié de manière solidaire. Selon l'invention, il est proposé que le noyau sandwich soit constitué de tiges végétales (3) creuses disposées parallèlement les unes aux autres et assemblées perpendiculairement aux couches extérieures.
PCT/DE1992/000953 1991-11-15 1992-11-14 Panneau sandwich leger WO1993009947A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DEG9114254.7U 1991-11-15
DE9114254U DE9114254U1 (de) 1991-11-15 1991-11-15 Leichte Naturstoffsandwichplatte

Publications (1)

Publication Number Publication Date
WO1993009947A1 true WO1993009947A1 (fr) 1993-05-27

Family

ID=6873337

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1992/000953 WO1993009947A1 (fr) 1991-11-15 1992-11-14 Panneau sandwich leger

Country Status (3)

Country Link
AU (1) AU2902392A (fr)
DE (1) DE9114254U1 (fr)
WO (1) WO1993009947A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6139487A (en) * 1997-04-02 2000-10-31 Impella Cardiotechnik Ag Intracardiac pump device
WO2012076455A1 (fr) * 2010-12-07 2012-06-14 Wassilij Grod Agencement composite constitué d'au moins deux plaques de recouvrement parallèles et comportant des moyens d'écartement et de raidissage
CN103144181A (zh) * 2013-04-07 2013-06-12 张文巨 一种秸秆复合板及其制作方法
CN103978537A (zh) * 2013-02-07 2014-08-13 富朗投资管理集团(香港)有限公司 一次成型无醛复合板材及加工工艺

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4339849A1 (de) * 1993-11-23 1995-05-24 Georg Dipl Ing Hoehn Als Putzträger geeignete Wärmedämmplatte
CN2268608Y (zh) * 1995-11-30 1997-11-26 周宁 对称结构竹集成材
DE19615505C2 (de) * 1996-04-19 2001-09-06 Bluemle Blueco Technik Doppelplattenkörper
WO2000068527A1 (fr) * 1999-05-08 2000-11-16 Tannhaeuser Gunter Panneau de montage rapide et de decoffrage et procede permettant de le dresser et procede et dispositif permettant de le produire
DE202017000543U1 (de) 2017-02-01 2017-04-25 Werner Ehrich Bauelement aus gepresstem Stroh mit Rahmen

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE880931C (de) * 1947-02-13 1953-06-25 Folke Roland Werner Werneskog Bauelement, insbesondere Bauplatte, und Verfahren zu ihrer Herstellung
SE303025B (fr) * 1964-11-21 1968-08-12 N Lundstad

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE880931C (de) * 1947-02-13 1953-06-25 Folke Roland Werner Werneskog Bauelement, insbesondere Bauplatte, und Verfahren zu ihrer Herstellung
SE303025B (fr) * 1964-11-21 1968-08-12 N Lundstad

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6139487A (en) * 1997-04-02 2000-10-31 Impella Cardiotechnik Ag Intracardiac pump device
WO2012076455A1 (fr) * 2010-12-07 2012-06-14 Wassilij Grod Agencement composite constitué d'au moins deux plaques de recouvrement parallèles et comportant des moyens d'écartement et de raidissage
CN103978537A (zh) * 2013-02-07 2014-08-13 富朗投资管理集团(香港)有限公司 一次成型无醛复合板材及加工工艺
CN103144181A (zh) * 2013-04-07 2013-06-12 张文巨 一种秸秆复合板及其制作方法
CN103144181B (zh) * 2013-04-07 2015-07-08 张文巨 一种秸秆复合板及其制作方法

Also Published As

Publication number Publication date
DE9114254U1 (de) 1992-01-23
AU2902392A (en) 1993-06-15

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