WO2019170358A1 - Panneau ventilé - Google Patents

Panneau ventilé Download PDF

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Publication number
WO2019170358A1
WO2019170358A1 PCT/EP2019/053013 EP2019053013W WO2019170358A1 WO 2019170358 A1 WO2019170358 A1 WO 2019170358A1 EP 2019053013 W EP2019053013 W EP 2019053013W WO 2019170358 A1 WO2019170358 A1 WO 2019170358A1
Authority
WO
WIPO (PCT)
Prior art keywords
panel
cover sheet
core structure
vent
vent opening
Prior art date
Application number
PCT/EP2019/053013
Other languages
English (en)
Inventor
Ralf USINGER
Franck MOURIAUX
Original Assignee
Ruag Schweiz Ag
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 Ruag Schweiz Ag filed Critical Ruag Schweiz Ag
Publication of WO2019170358A1 publication Critical patent/WO2019170358A1/fr

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Classifications

    • 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
    • E04C2/44—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose
    • E04C2/52—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose with special adaptations for auxiliary purposes, e.g. serving for locating conduits
    • E04C2/521—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose with special adaptations for auxiliary purposes, e.g. serving for locating conduits serving for locating conduits; for ventilating, heating or cooling
    • E04C2/523—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the purpose with special adaptations for auxiliary purposes, e.g. serving for locating conduits serving for locating conduits; for ventilating, heating or cooling for ventilating
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts
    • E04C2/36—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by transversely-placed strip material, e.g. honeycomb panels
    • E04C2/365—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts spaced apart by transversely-placed strip material, e.g. honeycomb panels by honeycomb structures
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B2001/742—Use of special materials; Materials having special structures or shape
    • E04B2001/748—Honeycomb materials
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84—Sound-absorbing elements
    • E04B2001/8457—Solid slabs or blocks
    • E04B2001/8476—Solid slabs or blocks with acoustical cavities, with or without acoustical filling
    • E04B2001/848—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
    • E04B2001/8495—Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element the openings going through from one face to the other face of the element

Definitions

  • the present invention is directed to a vented panel.
  • vented panels usually comprise a cellular core structure, such as a honeycomb structure, having one or more small vent holes in each cell wall.
  • Other types of panels comprise honeycomb cores made from perforated materials.
  • EP09551 09A2 was published on behalf of Hexcel Corporation on 1 0.1 1 .1 999 and discloses a flexible honeycomb panel which is vented by providing vent openings at specific locations within the honeycomb core.
  • honeycomb In panels having low-density core structures and relatively thin but stiff cover sheets (aka facesheets) are often used. Some of these structures are also known as sandwich-structured composites. For many applications cellular solids are used as core structures as they typically unite relatively good mechanical prop erties with low mass. This in particular holds true for cellular solids that have closed cells.
  • honeycomb One of the most commonly used type of cellular solid as core material for sandwich-structured composites in aviation and the most commonly used material for space applications is honeycomb.
  • honeycomb core material made from alumi num that is commonly used for space applications, but may also hold true for other types of core materials, such as aramid honeycomb.
  • aircraft and in particular also spacecraft are subject to large changes in ambient air pressure.
  • spacecraft in cluding satellites
  • they are typically also subject to significant changes in ambient temperature, which may lead to build-up of pressure in gas-filled closed cells of cellular structures, such as honeycomb panels.
  • Build-up of critically high pressure within the closed cells of such panels may conseguently lead to debonding or core explosion. Therefore such panels must be vented to obtain pressure egualization between inside and outside of the panels.
  • perforation of the cell walls in aluminum honeycomb for venting reguirements is usually expensive and leads to other disadvantages. It is one object of the present invention to avoid at least one of the problems that may result from the panels known from the prior art.
  • a panel according to the present invention typically comprises a core structure and a first cover sheet arranged at a first side of core structure while at least partially covering the core structure.
  • the first cover sheet comprises a first cover sheet inner surface that is bonded to the core structure and a first cover sheet outer surface that defines a first outer panel surface.
  • a panel according to the present invention typically also comprises a second cover sheet arranged at a second, opposite side of the core structure while at least partially covering the core structure.
  • the second cover sheet comprises a second cover sheet inner surface that is bonded to the core structure and a second cover sheet outer surface that defines a second outer panel surface.
  • the first and/or second cover sheet may e.g. be bonded to the core struc- ture by means of an adhesive (e.g.
  • the core structure together with the first and/or the second cover sheet defines a mul tiplicity of closed cells.
  • closed cells in the panel will be typically fluid ically separated from each other by cell walls. How- ever, also multiple cells may also be fluid ically interconnected with each other within the panel and hence form a kind of closed group of cells.
  • each closed cell is fluid ically interconnected with at least one vent opening arranged at the first cover sheet and extending from the first cover sheet inner sur face to the first cover sheet outer surface and /or (in addition or alternatively to this) a closed cell may also be fluidically interconnected with at least one vent opening arranged at the second cover sheet and extending from the second cover sheet in ner surface to the second cover sheet outer surface.
  • the closed cells are flu idically interconnecting with the outside of the panel.
  • the concept of the present invention is not limited to panels having thin cover sheets. It may also be applied to panels comprising at least one cover sheet having a significant thickness relatively to the total thickness of the plate, like a cover sheet being a plate- or a block-like structure.
  • Optimal pressure egualization may be obtained if the closed cells essentially extend in direction perpendicular to the first and/or the second cover sheet thorough the thickness of the core structure.
  • the cells may have a regular shape, like a circular, rectangular or hexagonal cross section. However, also semi-regular patterns or ir regular patterns are possible within the context of the present invention.
  • the core structure is a hon- eycomb.
  • Flexible as well as non-flexible honeycombs may be used. Good results may be obtained if a honeycomb core ranges from about 3 to 1 3 mm in cell size. However, the invention may also be used for honeycombs having cell sizes outside of this range. Good results may be obtained if the core structure - in particular if being a honeycomb - is made from an aluminum. However, alternatively or in ad- dition at least part of the core structure (respectively the honeycomb) may be made from a paper or from a plastic or from a fiber reinforced plastic. Other materials may be used.
  • At least one of the vent openings may be arranged at the first and/or the second cover sheet in a regular and/or in semi-regular pattern.
  • the type of pattern may vary depending on the location on the panel.
  • vent openings may also be ar ranged in an irregular pattern, following a statistical distribution.
  • types of pan els may e.g. produced using etching or by dissolving of particles embedded in the first and/or second cover sheet.
  • a panel that can be produced relatively easily starting from a conventional non-vented panel may be obtained if the vent openings are arranged in a regular pattern having an arrangement and separating between individual vent openings that ensures that every closed cell is fluidically interconnected with at least one vent opening, regardless of the positioning and/or alignment of the closed cells relatively to the first and/or second cover sheet.
  • a panel with reliable venting respectively pressure egualization may be obtained without a need for exact alignment of individual vent openings relatively to the closed cells.
  • Such embodiments of a panel according to the invention are particu larly advantageous for certain types of cover sheets having relatively high thickness or for certain applications where a special kind of loading is applied to the panel.
  • the vent openings may be arranged in a regular pattern following the geom etry (respectively geometrical and/or structural characteristics) of the core struc ture, as will be explained in more detail below.
  • a minimum number of vent openings may be applied, e.g. exactly one vent opening per closed cell.
  • the vent openings may be arranged relatively to the architec ture (e.g. cell walls) of the core structure such that structural weakening, respec tively stress concentration around the vent openings can be minimized or the struc tural competence of the panel can even be increased if compared to a panel without vent openings, as will be explained in more detail below with respect to the figures.
  • the vent openings may be arranged dependent on an internal structure (e.g. positioning and orientation of embedded reinforcing fibers) and/or local variations in material properties of the first and/or the second cover sheet. Such regular pattern following the geometry/architecture of the core structure is particularly advantageous if the core structure is a honeycomb as will be shown in more detail below.
  • vent openings are arranged on one and the same cover sheet, respectively all vent openings being arranged on the first cover sheet or all vent openings are arranged on the second cover sheet.
  • one panel surface can remain essentially unaffected by the vent openings.
  • a first fraction of the closed cells is fluidically interconnected with at least one vent opening arranged at the first cover sheet and a second fraction of the closed cells is fluidically interconnected with at least one vent opening arranged at the second cover sheet.
  • each of the closed cells belongs either to the first or to the second fraction of closed cells.
  • cover sheets made from certain types of materials that are e.g. prone to crack development if a critical number of vent openings per unit area is exceeded.
  • vent openings may be used in order to control stress and strain distribution in a panel, such as stress and strain caused by load applica- tion means to be mounted on or inside of a panel.
  • the arrangement and density per unit area may at least in certain areas also be dependent on a type of insert to be mounted on or inside of a panel.
  • the positioning of at least one of the vent openings may be dependent on positioning of at least one load introduction means arranged on or within the panel or to be arranged on or within the panel.
  • the vent open ings may be used in order to arrest cracks and conseguently prevent them from uncontrolled propagation within a panel.
  • such a variation of the invention may have a significantly improved mechanical performance if compared to panels known from the prior art.
  • At least one vent openings may be intro pokerd in the panel prior to mounting of load introduction means (e.g. inserts).
  • load introduction means e.g. inserts
  • at least one vent opening may be introduced in the panel after mounting of load introduction means.
  • At least one of the vent openings may be used for positioning of inserts to be mounted on the panel.
  • the vent openings are arranged in regular or semi-regular patterns automatic, such patterns may be used as coordinate systems, respectively may be used to register a panel's coordinate system with a coordinate system of a tool used to mount an insert on the panel, e.g. by optical recognition of the vent openings.
  • at least one of the vent openings may have a different shape if compared to the other vent openings in order to assist in such a registration process.
  • vent openings have a cross-section of between 0.002 and 0.8 mm 2 (square millimeters) and/or a di ameter of between 0.05 and 0.5 mm (millimeters) .
  • vent openings having other dimensions may be used for certain ap plications and types of cover sheets. Good results for various applications may be obtained if at least one vent opening has an essentially circular cross section.
  • At least one of the vent openings may have an essentially elliptical cross-section, the semi-minor and the semi-major axes oriented such that cracks can be prevented from developing or propagation in the first and /or second cover sheet.
  • At least one of the vent openings has a cylindrical profile, as will be shown in more details below.
  • at least one of the vent openings has a tapered edge arranged at the side opposite from the core structure.
  • at least one of the vent openings may have a tapered edged arranged at the side directed to the core struc ture.
  • At least one of the vent openings may have a conical profile, having a smaller diameter at the side directed to the core structure.
  • Such types of vent openings are advantageous for certain applications.
  • at least one of the vent openings may have a rounded edged arranged at the side opposite from the core structure.
  • at least one of the vent openings may have a rounded edged arranged at the side directed to the core structure.
  • the size and/or shape of the vent openings may be chosen such that an adhesive agent applied for embedding of the insert in the core structure of the panel will due to its viscosity and the applied pressure not flow out of the panel via a vent opening.
  • a coating may be arranged on the first cover sheet outer surface and/or on the second cover sheet outer surface, thereby sealing at least one vent opening.
  • the coating may be permeable for gas and impermeable for at least some liguids and/or solids.
  • the coating may also comprise a varnish applied to the first and /or second outer surface of the panel.
  • a film may be detachably arranged on the first cover sheet outer surface and /or on the second cover sheet outer surface, the film sealing at least one vent opening.
  • a panel may be used in order to pre- vent any debris, liguid and gas from passing the vent opening during processing of the panel. Prior to putting the panel into service/operation, the film then can be easily removed, allowing optimal venting performance.
  • at least one of the vent openings may be sealed by a plug that is at least partially arranged in the vent opening, the plug being permeable for gas and impermeable for at least some liguids and/or solids. Thus, sealing of the vent openings can be obtained without affecting the outer surfaces.
  • vent openings A variety of methods may be used in order to produce vent openings.
  • at least one vent opening may be made using laser drilling / laser perforation.
  • laser drilling can be used in order for local heat treatment (tempering) of a cover sheet around a vent opening.
  • local strength and/or ductility may be increased.
  • cover sheet material around vent openings may be altered e.g. by deposition of certain elements.
  • At least one vent opening may be made using electrical discharge machining.
  • at least one vent opening may be made by small hole drilling.
  • at least one vent opening is made by water jet cutting.
  • at least one vent opening is made using etching. Therefore soluble particles may be embedded in the first and /or second cover sheet during production of the cover sheets and subseguently dissolved.
  • the vent openings are produced after the first and/or second cover sheet have been bonded to the core structure.
  • a bonding adhesive layer or e.g. solder that may be arranged between the first - respectively second - cover sheet and the core structure can be reliably per forated.
  • At least one vent opening will include a passage that extends through a first or a second cover sheet and an adhesive layer arranged between the first or the second cover sheet and the core structure.
  • the first and /or the second cover sheet may be made from a metal. Good results may be e.g. obtained if made from aluminum or titanium.
  • the first and/or the second cover sheet may be made at least partially from a plastic or a fiber reinforced plastic.
  • it may e.g. be made from a carbon fiber reinforced plastic.
  • Other materials may be used, such as ceramics.
  • at least one vent opening may be used as a marking of the panel. Therefore, at least one vent opening may differ in size or shape from the majority of the vent openings.
  • multiple vent openings may be arranged in order to provide information about the panel and /or regarding positioning of e.g. inserts to be mounted as load introduc- tion points.
  • vent openings are introduced into a first cover sheet after a first cover sheet has been bonded to the core structure, but before the second cover sheet has been bonded to the core structure.
  • vent openings can thus be produced via the core structure, allowing exact positioning of the vent openings relatively to cells walls of the core structure.
  • the geometry of the core structure respectively the position of the closed cells may be determined using ultrasound measurements of the cover sheets and/or measurement of local variation in electromagnetic fields.
  • a temperature gradient may be applied between the first and the second cover sheet. This for example may be done by laying the panel's second cover sheet on a substrate having a lower temperature than the first cover sheet (e.g. the first cover sheet being ambient temperature).
  • the position of the closed cells can be determined by measuring local surface temperature of the first cover sheet (e.g.
  • FIG. 1 schematically shows a variation of a panel according to the present inven tion in a perspective view
  • Fig. 2 schematically shows a portion of a variation of a panel, most of the first cover sheet and core structure clipped for illustrative purposes to visualize a closed cell
  • Fig. 3 schematically shows another variation of a panel according to the present invention, part of the first cover sheet and the core structure being clipped for illustrative purposes;
  • Fig. 4 shows detail D of Figure 3 ;
  • FIG. 5 shows detail E of Figure 4
  • Fig. 6 schematically depicts positioning of vent openings arranged at a cover sheet relatively to the core structure in a first type of a regular pattern according to the present invention
  • Fig. 7 schematically shows positioning of vent openings arranged in a first cover sheet and a second cover sheet in a second type of a regular pattern ac cording to the present invention
  • Fig. 8 schematically shows positioning of vent openings relatively arranged in a first cover sheet and a second cover sheet in a third type of a regular pat tern according to the present invention
  • Fig. 9 schematically discloses positioning and orientation of vent openings rela tively arranged to a cover sheet in a fourth type of a regular pattern ac cording to the present invention
  • Fig. 1 0 schematically shows a vent opening having a first type of profile accord ing to the present invention
  • Fig. 1 1 schematically shows a vent opening having a second type of profile ac cording to the present invention
  • Fig. 1 2 schematically shows a vent opening having a third type of profile accord ing to the present invention
  • Fig. 1 3 schematically shows a vent opening having a third type of profile accord ing to the present invention
  • Fig 1 4 schematically depicts a cover sheet comprising a coating
  • Fig 1 5 schematically depicts a cover sheet comprising plug being arranged in a vent opening
  • Fig. 1 and 2 schematically show a first variation of a panel 1 according to the pre sent invention.
  • the panel 1 comprises a core structure 1 00 which in the variation shown is a honeycomb panel, as is more clearly visible in Fig. 2 which shows a por tion of the panel of Fig.
  • the panel of Fig. 1 further comprises a first cover sheet 200 arranged at a first side of core structure 1 01 while at least partially covering the core structure 1 00 and which comprises a first cover sheet inner sur face 21 0 bonded to the core structure 1 00.
  • the bonding is done by an adhesive layer (not visible) arranged between the core structure 1 00 and the cover sheet 200.
  • the first cover sheet 200 further comprises a first cover sheet outer surface 220 that defines a first outer panel surface 2.
  • the panel 1 comprises a second cover sheet 200 arranged at a second, opposite side of the core structure 1 02 while at least partially covering the core structure 1 00 and which comprises a second cover sheet inner surface 3 1 0 bonded to the core struc ture 1 00, and a second cover sheet outer surface 320 that defines a second outer panel surface 3.
  • the core structure 1 00 together with the first 200 and the second cover sheet 300 defines a multiplicity of closed cells 1 0 that in the embodiment shown extend in direction perpendicular to the first cover sheet 200 and the second cover sheet 300 thorough the thickness of the core structure 1 00.
  • each of these closed cells 1 0 is fluidically interconnected with a vent opening 20, 20' arranged at the first cover sheet 200, the vent openings 20 extending from the first cover sheet inner surface 21 0 to the first cover sheet outer surface 21 0.
  • vent openings 20 are only arranged at the first cover sheet 200 while the second cover sheet 300 comprises no vent openings 20.
  • the vent openings 1 0 are arranged in a regular pattern following the geometry of the core structure 1 00 and having a diameter of about 0.5 mm. In particular they are arranged about in the middle of the closed cells' 1 0 hexagonal cross-sections.
  • venting openings 20 having a relatively small diameter of about 0. 1 mm are arranged at the second cover sheet 300.
  • the vent openings 20 have a size that is small enough to prevent liguids hav ing a certain viscosity from passing the vent opening 20, such as adhesive agents used for embedding inserts (not shown) in the core structure 1 00 of the panel, but still big enough to allow sufficient passage of gas to obtain pressure egualization.
  • Figs. 6 to 9 schematically show a cross sectional views of different variations of panels 1 according to the present invention in order to illustrate the positioning and alignment of the vent openings 20, 20' relatively to the closed cells of the core structure 1 00.
  • vent openings 1 0 are arranged in a regular rectangular pattern having an arrangement and separating between individual vent openings 20 that ensures that every closed cell 1 0 is fluid ically interconnected with at least one vent opening 20 regardless of the positioning and alignment of the closed cells 1 0 relatively to the first cover sheet 200.
  • Figs. 7 and 8 schematically depict two variations of a panel 1 where a first part of the closed cells 1 0 is fluid ically interconnected with vent openings 20 arranged at the first cover sheet whereby the rest of the closed cells 1 0, forming a second part of the closed cells 1 0, is fluidically interconnected with vent openings 20' arranged at the second cover sheet.
  • vent openings 20 arranged at the first cover sheet round symbols are used, whereas for those arranged at the second cover sheet rectangular symbols are used. Please note that these symbols are just for illustrative purposes and hence do not describe the real cross-sections of the vent openings 20, 20'.
  • the vent open ings 20, 20' on the first and the second cover sheets 200, 300 are arranged ac cording to a in linear pattern.
  • Such a variation of a panel may be advantageous for some types of panels if certain load cases are applied as the density of vent open ings 20, 20' in the cover sheets is reduced if compared to variations where all vent openings are arranged at the same cover sheet.
  • the variation of a panel 1 schematically shown in Fig. 8 depicts another linear-type of arrangement of vent openings 20, 20' on both the first and the second cover sheets 200, 300. In contrast to the panel 1 shown in Fig.
  • vent openings 20, 20' are aligned on lines that are not perpendicular to the panel's sides, but meet the sides at an angle b (beta) which in the shown variation is 30° (degrees).
  • angle b (beta) which in the shown variation is 30° (degrees).
  • any other angular orientation can be obtained by rotating the core structure 1 00 relatively to the cover sheets 200, 300 and hence the mechanical competence of the cover sheets 200, 300 and conseguently the whole panel 1 be optimized for certain types of load cases and/or load application devices to be mounted to the panel.
  • Fig. 9 schematically shows another variation of a panel 1 having vent openings 20, 20' arranged at the first cover sheet 200, the vent openings having essentially el liptical cross-sections.
  • the semi-minor and the semi-major axes of the vent open ings 20, 20' are oriented in a certain manner to localized potentially developing cracks and prevented them from propagating in an uncontrolled manner within in the first cover sheet 200.
  • Fig. 10 schematically shows a first cover sheet 200 of a variation of a panel 1 ac cording to the present invention where the vent opening 20 has a cylindrical profile with a tapered edge (with angle a (alpha)) arranged at the side opposite from the core structure.
  • a tapered edge with angle a (alpha)
  • Fig. 1 1 schematically shows a first cover sheet 200 of variation of a panel 1 accord ing to the present invention where the vent opening 20 has a conical profile (with opening angle a (alpha)), having a smaller diameter at the side directed to the core structure.
  • a conical profile with opening angle a (alpha)
  • Fig. 12 schematically shows a first cover sheet 200 of a variation of a panel 1 ac cording to the present invention where the vent opening 20 has a rounded edged (with local curvature t) arranged at the side opposite from the core structure. Using such rounded edge allows to reduce the risk of crack development event signifi- cantly.
  • Fig. 13 schematically shows a first cover sheet 200 of a variation of a panel 1 ac cording to the present invention where the vent opening 20 has a rounded edged arranged at the side opposite from the core structure and at the same time has a rounded edged arranged at the side directed to the core structure. As all edges are rounded in such a vent opening, the risk of crack development can be significantly reduced.
  • Fig. 14 schematically shows a first cover sheet 200 of a variation of a panel 1 ac cording to the present invention where a coating 400 is arranged on the first cover sheet outer surface 220.
  • the coating 400 seals the vent opening 20 such that gas can still pass through the vent opening 20 but no liguids such as water and no solids, such as dust, can pass the vent opening 20 and enter into a closed cell (not shown).
  • Such embodiments may e.g. be advantageous for applications in aviation where accumulation of humidity and subsequent corrosion effect within a panel have to be prevented.
  • Fig. 1 5 schematically shows a first cover sheet 200 of another variation of a panel 1 having a sealed vent opening 20.
  • the vent opening 20 is sealed by a plug 500 that is arranged in the vent opening 20 such that gas can still pass through the vent opening 20 but no liquids such as water and no solids can.
  • a plug 500 that is arranged in the vent opening 20 such that gas can still pass through the vent opening 20 but no liquids such as water and no solids can.
  • Such a variation of the invention may be advantageous for certain applications as the outer surface 220 is mostly unaffected by the sealing.

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  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Laminated Bodies (AREA)

Abstract

Cette invention concerne un panneau (1) qui comprend une structure d'âme (100) et une première feuille de couverture (200) disposée sur un premier côté de la structure d'âme (101) tout en recouvrant au moins partiellement la structure d'âme (100) et qui comprend une surface interne de première feuille de couverture (210) reliée à la structure d'âme (100), et une surface externe de première feuille de couverture (220) qui définit une première surface de panneau externe (2). Le panneau comprend en outre une seconde feuille de couverture (300) disposée sur second côté opposé de la structure d'âme (102) tout en recouvrant au moins partiellement la structure d'âme (100) et qui comprend une surface interne de seconde feuille de couverture (310) reliée à la structure d'âme (100), et une surface externe de seconde feuille de couverture (320) qui définit une seconde surface de panneau externe (3). Selon l'invention, la structure d'âme (100) conjointement avec la première et/ou la deuxième feuille de couverture (200, 300) définit une multiplicité de cellules fermées (10). Chaque cellule fermée (10) est en communication fluidique avec au moins une ouverture d'aération (20, 20') ménagée dans la première feuille de couverture (200) et s'étendant de la surface interne de première feuille de couverture (210) à la surface externe de première feuille de couverture (210) et/ou au moins une ouverture d'aération (20, 201') ménagée dans la seconde feuille de couverture (300) et s'étendant de la surface interne de seconde feuille de couverture (310) à la surface externe de seconde feuille de couverture (310).
PCT/EP2019/053013 2018-03-05 2019-02-07 Panneau ventilé WO2019170358A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH2652018 2018-03-05
CH265/18 2018-03-05

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Publication Number Publication Date
WO2019170358A1 true WO2019170358A1 (fr) 2019-09-12

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111519798A (zh) * 2020-05-26 2020-08-11 张建国 一种建筑外墙保温防火抗震一体化新型节能墙块
EP4311893A1 (fr) * 2022-07-29 2024-01-31 Admonter Holzindustrie AG Panneau de construction

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2096535A (en) * 1981-04-14 1982-10-20 Rolls Royce Honeycomb panel construction
DE3913255A1 (de) * 1989-04-22 1990-10-25 Brigitte Schmelzle Schalldaemmende abdeckplatte
WO1999014445A1 (fr) * 1997-09-18 1999-03-25 Gerhard Fleischhacker Dispositif de formage d'une dalle de revetement de sol, d'un couvercle de regard ou analogue permeable aux liquides
EP0955109A2 (fr) 1998-05-07 1999-11-10 Hexcel Corporation Structure de nid d'abeilles pliable
EP1382652A1 (fr) * 2002-04-25 2004-01-21 Airbus France Film adhésif perforé et son procédé de fabrication
EP2937483A1 (fr) * 2014-04-24 2015-10-28 STIA - Holzindustrie Gesellschaft m.b.H. Panneau de construction, en particulier dalle de plafond ou murale

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2096535A (en) * 1981-04-14 1982-10-20 Rolls Royce Honeycomb panel construction
DE3913255A1 (de) * 1989-04-22 1990-10-25 Brigitte Schmelzle Schalldaemmende abdeckplatte
WO1999014445A1 (fr) * 1997-09-18 1999-03-25 Gerhard Fleischhacker Dispositif de formage d'une dalle de revetement de sol, d'un couvercle de regard ou analogue permeable aux liquides
EP0955109A2 (fr) 1998-05-07 1999-11-10 Hexcel Corporation Structure de nid d'abeilles pliable
EP1382652A1 (fr) * 2002-04-25 2004-01-21 Airbus France Film adhésif perforé et son procédé de fabrication
EP2937483A1 (fr) * 2014-04-24 2015-10-28 STIA - Holzindustrie Gesellschaft m.b.H. Panneau de construction, en particulier dalle de plafond ou murale

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111519798A (zh) * 2020-05-26 2020-08-11 张建国 一种建筑外墙保温防火抗震一体化新型节能墙块
CN111519798B (zh) * 2020-05-26 2021-07-27 中铁建工集团有限公司 一种建筑外墙保温防火抗震一体化节能墙块
EP4311893A1 (fr) * 2022-07-29 2024-01-31 Admonter Holzindustrie AG Panneau de construction

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