US20080163587A1 - Composite panel structure with frame reinforcement - Google Patents
Composite panel structure with frame reinforcement Download PDFInfo
- Publication number
- US20080163587A1 US20080163587A1 US12/006,488 US648808A US2008163587A1 US 20080163587 A1 US20080163587 A1 US 20080163587A1 US 648808 A US648808 A US 648808A US 2008163587 A1 US2008163587 A1 US 2008163587A1
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- Prior art keywords
- panel structure
- frame elements
- elements
- density
- core
- Prior art date
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- 239000002131 composite material Substances 0.000 title claims abstract description 15
- 230000002787 reinforcement Effects 0.000 title description 3
- 238000005253 cladding Methods 0.000 claims abstract description 34
- 230000001815 facial effect Effects 0.000 claims abstract description 18
- 239000000463 material Substances 0.000 description 22
- 229920000139 polyethylene terephthalate Polymers 0.000 description 9
- 239000005020 polyethylene terephthalate Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 4
- 240000007182 Ochroma pyramidale Species 0.000 description 2
- 239000006261 foam material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000003856 thermoforming Methods 0.000 description 2
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 239000012634 fragment Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- -1 polyethylene terephthalate Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
Images
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
- E04C2/02—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
- E04C2/243—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 one at least of the material being insulating
-
- 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
- E04C2/246—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 combinations of materials fully covered by E04C2/16 and E04C2/20
-
- 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
-
- 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
- E04C2/38—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 with attached ribs, flanges, or the like, e.g. framed panels
- E04C2/388—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 with attached ribs, flanges, or the like, e.g. framed panels with a frame of other materials, e.g. fibres, plastics
-
- 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
- E04C2002/3488—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 frame like structures
Abstract
Composite panel structure including a pair of spaced, generally parallel-planar, fibre-reinforced, facial cladding sheets, and, disposed between and thermally bonded to these sheets, core structure including interleaved, generally side-by-side-parallel, elongate, low-density core elements, and elongate, higher-density, fibre-reinforced frame elements. Each frame element includes a pair of generally orthogonally intersecting, planar facial expanses, one of which is bonded to an adjacent core element, and the other of which is bonded to one of the cladding sheets.
Description
- This application claims priority to prior-filed, currently co-pending U.S. patent applications, Ser. Nos. 60/878,845, filed Jan. 5, 2007 for “Strength Panel With Trans-Planar, Fibre Rib Reinforcement, and its Manufacture”, and 60/879,460, filed Jan. 8, 2007, for “Panel Structure With Angular-Form Core Reinforcement”. The entire disclosure contents of these two Provisional patent applications are hereby incorporated herein by reference.
- The present invention relates to the thermoforming, and thereby the internal and external configuring, of composite-material structural components, such as panel-like components, from selected, intercooperative thermo-compatible materials. The term “thermo-compatible” as employed herein is intended to refer to thermoformable materials which can be heat-and-pressure bonded (thermo-pressure bonded, or thermobonded) to one another through a weld-like, rather than through an independent, adhesive-like, uniting and load-transmitting interface.
- More particularly, the invention concerns a composite, thermoformed panel structure which features a pair of spaced, relatively thin, high-density, thermoformable cladding sheets that lie on opposite faces of a core structure which includes plural, internal, thermoformable frame elements that extend between, and are thermobonded to, the inside face of each of these cladding sheets.
- Included in the core structure, in addition to the mentioned frame elements, are plural, low-density, lightweight core elements which are interleaved with the frame elements, and which may also be made of thermoformable materials.
- The frame elements and core elements are generally elongate and slender in nature, and are disposed with their long axes substantially parallel to one another. The frame elements principally possess, each, one of three different forms. In one form, their cross-sectional configuration is generally I-shaped. In another, their cross-sectional configuration is somewhat Z-shaped, including a pair of spaced, substantially parallel portions which are bridged by a central, orthogonally disposed portion. In the third, this cross-sectional configuration is generally C-shaped, and also includes a pair of spaced, substantially parallel portions which are bridged by an orthogonally disposed central portion.
- What exists, therefore, in this special structural arrangement is a composite, lightweight and very strong, thermoformed panel structure. The overall volumetric bulk of this structure is made up of relatively low-density, lightweight core elements, and its robust strength resides in the weld-like operative interconnections that exist between the pair of spaced, high-density, facial, thermoformable cladding sheets, and the plural, sheet-interconnecting, high-density, thermoformable frame elements which bridge between the cladding sheets, and lie interleaved with the low-density core elements.
- In such a structure, no matter what the nature might be of the included, light-density core elements, the internal frame elements act as a structural load-handling unit with the two cladding sheets through material homogenizing weld-like bonded interfaces. Where the light-density core elements are made of compatible thermoformable material, load-handling weld-like bonds also exist between the core elements, cladding sheets, and the frame elements.
- These and various other useful features of the present invention will become more fully apparent as the detailed description of the invention which follows below is read in conjunction with the drawings.
-
FIG. 1 is a simplified and fragmentary schematic isometric view generally of a portion of a thermoformed composite panel structure including core elements, frame elements, and spaced cladding sheets made in accordance with a preferred embodiment of the present invention. -
FIGS. 2-5 , inclusive, provide fragmentary, isometric illustrations of four (of many possible) different frame elements employable in a panel structure, as such is shown inFIG. 1 . These several frame elements are pictured largely isolated from adjacent panel structure componentry, except for the presence in each figure of a small portion of a cladding sheet. -
FIGS. 6 and 7 fragmentarily illustrate certain suitable steps that are implementable to create one form of a panel structure such as that generally pictured in FIG. 1—this particular panel-structure form being that which is fully illustrated inFIG. 8 , employing a core-frame-element configuration such as that pictured inFIG. 2 . -
FIGS. 9 and 10 illustrate the making (FIG. 9 ) of another resulting form of panel structure (FIG. 10 ) which utilizes frame elements like that presented inFIG. 3 . -
FIG. 11 illustrates a modified version of the panel-structure form which is shown inFIG. 8 . In this modified form of the invention, next-adjacent core frame elements are employed in a differential spacing manner, interleaved with lightweight core elements of suitable, differing, inter-frame-element (i.e., element-to-element) dimensions. -
FIGS. 12-14 , inclusive, illustrate the making, and the resulting structure, of a composite panel structure utilizing frame elements as pictured inFIG. 4 . -
FIGS. 15 and 16 show the making, and the resulting structure, of a composite panel structure employing frame elements like that shown inFIG. 5 . - Beginning with
FIG. 1 , shown generally at 20 is a thermoformed, composite panel structure, or panel, made in accordance with a preferred embodiment of the invention.Panel 20 includes a pair of spaced, parallel-planar, opposite-surface cladding sheets internal frame elements frame element 32. Interleaved with next-adjacent frame elements are plural, elongate, spaced, parallel core elements 34 (betweenframe elements 26, 28), 36 (betweenframe elements 28, 30), and 38 (betweenframe elements 30, 32). - Most of the volume of
panel structure 20 is made up by the core elements which are formed preferably of a low-density, lightweight, thermoformable material, such as PET (polyethylene terephthalate) foam material. The PET foam material has a density of about 6-lbs/ft3. These elements may also be made, if desired, of a low-density, lightweight, non-thermoformable material, such as balsa, which has a density of about 5-12-lbs/ft3. - The cladding sheets and frame elements are made preferably from a higher-density, thermoformable, sheet-like material, such as the fibre-reinforced polymer material known as Polystrand®, produced by Polystrand, Inc. in Montrose, Colo. This material is typically supplied in sheet-like form with a nominal sheet thickness of about 0.02-inches, and with a density of about 120-lbs/ft3.
- Where, as is preferred, all of the materials employed in
panel structure 20 are made of thermoformable materials, appropriate heat and pressure which is employed to shape and unify the panel components will produce weld-like bonds between the cladding sheets and the frame elements, between the cladding sheets and the core elements, and between the frame elements and the core elements. In all embodiments of the invention, the bonds which exist between the cladding sheets and the frame elements, all preferably made of high-density, fibre-reinforced materials, produce, in an overall lightweight panel structure, a structure of great strength owing to the coupling of the two cladding sheets through weld-like bonds developed with the interconnecting frame elements. - Within
panel structure 20, all of the internal frame elements are preferably, though not necessarily, alike in configuration and equally spaced from one another. The end, or edge, frame elements, such aselement 32, are somewhat different in configuration. More will be said about these frame-element configurations and considerations later. - The cladding sheets herein are formed of plural, such as two, layers of Polystrand® material to have a substantially uniform thickness of about 0.04-inches.
- The spacing existing between the cladding sheets in
panel structure 20 herein is about 0.5-inches. Different values for the dimension of this spacing may, of course, be chosen if desired. The uniform, center-line-to-center-line distance between next-adjacent frame elements, as seen inFIG. 1 , is about 2-inches. Here, too, different uniform spacings between these elements may be chosen, if desired. Additionally, and as will be mentioned again shortly, non-uniform frame-element-to-frame-element center-line spacings may be employed, if desired. - Looking now at
FIGS. 2-5 , inclusive, as was mentioned earlier herein, the frame elements proposed by the present invention may preferably take on any one of three different forms. One of these three forms is illustrated herein in two different versions. -
FIG. 2 shows an elongate, I-shaped (cross-sectional)frame element 40 having along axis 40 a.Element 40 is formed of two, twin-sheet, thermally bonded layers of Polystrand® material shown at 40 b, 40 c inFIG. 2 to have an overall layer thickness herein of about 0.04-inches.Element 40 additionally includes four, orthogonally intersectingfacial expanses expanse 40 f being shown thermally bonded to claddingsheet 24.Facial expanse 40 d is thermally bonded to the other cladding sheet (not shown), and expanses 40 e, 40 f are thermally bonded to adjacent PET core elements (also not shown). If the core elements chosen for use are made of a non-thermoformable material, such as balsa, bonding of a frame element to a core element takes the form of resin flow from the frame-element material into pores present in the non-thermoformable material. -
FIG. 3 shows at 42 another version of an I-shaped, plural-layer, Polystrand® frame element having along axis 42 a, and possessing a thickness which is about twice that of previously discussedframe element 40. Accordingly, four layers inelement 42 are pictured at 42 b, 42 c, 42 d, 42 e inFIG. 3 .Element 42 also includes four orthogonally intersectingfacial expanses expanse 42 h being shown thermally bonded to claddingsheet 24.Facial expanse 42 f is thermally bonded to the other cladding sheet (not shown). PET core elements (also not pictured) are thermally bonded tofacial expanses 42 g, 42 i. -
FIG. 4 shows at 44 a generally Z-shaped (cross-sectional) frame element having along axis 44 a.Element 44, as shown herein, has, throughout, a thickness of about 0.04-inches, and includes a planarcentral portion 44 b which joins with two, spaced, parallel-planar extremity portions central portion 44 b.Element 44 additionally includes four orthogonally intersectingfacial expanses facial expanse 44 g being shown thermally bonded to claddingsheet 24.Facial expanse 44 e is thermally bonded to the other cladding sheet (not illustrated), andfacial expanses -
FIG. 5 illustrates, at 46, a generally C-shaped (cross-sectional) frame element having along axis 46 a. This element, like previously describedelement 44, has a thickness throughout of about 0.04-inches. It includes a planarcentral portion 46 b which joins with two, spaced, parallel-planar extremity portions central portion 46 b.Element 46 further includes three orthogonally intersectingfacial expanses facial expanse 46 g being shown thermally bonded tocladding sheet 24.Facial expanse 46 e is thermally bonded to the other cladding sheet (not illustrated), andfacial expanse 46 f is thermally bonded to a PET core element (not pictured). - With regard to the several frame-element configurations presented in
FIGS. 2-5 , inclusive,elements element 46 is structured to be an end, or edge, frame element. -
FIGS. 6-8 , inclusive, in sequence, illustrate the making of a composite panel structure employing I-shaped internal frame elements, likeelement 40 seen inFIG. 2 , withFIG. 8 specifically showing a fragment of such a completed, composite panel structure. These drawing figures are substantially self-explanatory. - In
FIG. 6 , a large, planarPET core slab 48 having anominal plane 48 a is clad, via thermo-pressure bonding, on its opposite faces with two-sheet layer assemblies Slab 48, after formation, is then cross-cut along lines, such aslines units FIG. 7 . These units are then rotated orthogonally, as shown, to create, in anominal plane 66 a, a panel-structure core assembly (66 inFIG. 8 ), which is then clad, via thermo-pressure bonding, with twocladding sheets dot lines FIG. 8 indicate the possibility of cladding opposite faces of a panel structure with a thicker cladding-sheet depth. -
FIGS. 9 and 10 illustrate the making of a composite panel structure employing I-shaped internal frame elements likeelement 42 seen inFIG. 3 .FIG. 10 shows a portion of a resulting completed panel structure. - The process involved here is substantially the same as the process described in relation to
FIGS. 6-8 , inclusive, except that, at the beginning of the process, opposite faces of a PET core slab 76 (having anominal plane 76 a) are thermally and compressively bonded with twin, two-sheet layers FIG. 10 .Structure 86 possesses anominal plane 86 a. -
FIG. 11 illustrates, at 88, a modified form of a panel structure like that pictured inFIGS. 6-8 , inclusive, except thatpanel structure 88, possessing anominal plane 88 a, is defined with selectively differentiated internal centerline spacing existing between next-adjacent frame elements. These different spacings are labeled D1, D2, D3 inFIG. 11 . -
FIGS. 12-14 , inclusive, illustrate, very self-explanatorily, the making of apanel structure 90 which includes Z-shapedinternal frame elements frame element 44 seen inFIG. 4 . -
FIGS. 15 and 16 illustrate the making of acomposite panel structure 94 which includes Z-shaped internal frame elements (such aselement 96, which is likeelement 44 pictured inFIG. 4 ), and at least one C-shaped edge, or end,frame element 98 which is likeframe element 46 shown inFIG. 5 . - Thus, a novel and very useful composite panel structure, which is largely, if not completely, formed of thermoformable materials, has been illustrated and described. Utilizing thermoforming and compression techniques, the proposed panel is easy to fabricate in a wide range of sizes and configurations.
- The low-density core elements in this panel structure furnish important dimensional stability to the structure, while at the same time, owing to the fact that, as seen in the drawing figures, they occupy most of the volume of a finished panel structure, contribute significantly to lightweightness of that structure.
- Major load-handling capability of the proposed panel structure is furnished mainly by the presence of fibre-reinforced, opposite-face cladding sheets, and the additional presence and distribution of fibre-reinforced frame elements which span the space between the cladding sheets, and which are bonded to these sheets through thermoformed weld-like interfaces. These frame elements tie the cladding sheets into a cooperative load-handling system.
- Those skilled in the relevant art may well recognize that variations and modifications of the proposed panel structure, not illustrated or described herein, may be made which will be clearly within the scope and spirit of this invention, and it is intended that all such variations and modifications will come within the scopes of the claims to this invention.
Claims (2)
1. A generally planar, thermoformed, composite panel structure comprising
a pair of spaced, generally parallel-planar, fibre-reinforced, facial cladding sheets, and
disposed intermediate said cladding sheets, and thermally bonded thereto, core structure including plural, elongate, interleaved, generally side-by-side-parallel (a) core elements of one density, and (b) elongate fibre-reinforced frame elements of another density which is greater than the mentioned one density,
at least certain ones of said frame elements including at least one pair of generally orthogonally intersecting, generally planar facial expanses, one of which expanses is bonded to an adjacent core element, and the other of which expanses is thermally bonded to one of said cladding sheets.
2. The structure of claim 1 , wherein each of said frame elements, as viewed along its long axis, possesses one of (a) a Z-shaped, (b) a C-shaped, and (c) an I-shaped, cross section.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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US12/006,488 US20080163587A1 (en) | 2007-01-05 | 2008-01-02 | Composite panel structure with frame reinforcement |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US87884507P | 2007-01-05 | 2007-01-05 | |
US87946007P | 2007-01-08 | 2007-01-08 | |
US12/006,488 US20080163587A1 (en) | 2007-01-05 | 2008-01-02 | Composite panel structure with frame reinforcement |
Publications (1)
Publication Number | Publication Date |
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US20080163587A1 true US20080163587A1 (en) | 2008-07-10 |
Family
ID=39593096
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US12/006,488 Abandoned US20080163587A1 (en) | 2007-01-05 | 2008-01-02 | Composite panel structure with frame reinforcement |
Country Status (2)
Country | Link |
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US (1) | US20080163587A1 (en) |
WO (1) | WO2008085890A2 (en) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011066174A1 (en) * | 2009-11-24 | 2011-06-03 | Kysor Panel Systems | High strength composite framing members |
US20130277378A1 (en) * | 2010-09-24 | 2013-10-24 | Cesium Holding Ab | Method of producing an enforced delimited element and such an element |
BE1021247B1 (en) * | 2013-08-26 | 2015-09-22 | Oeterbeton | INSULATION WALL FOR CONSTRUCTIONS |
US11181315B2 (en) | 2018-09-25 | 2021-11-23 | Kps Global Llc | Hybrid insulating panel, frame, and enclosure |
US20230141832A1 (en) * | 2021-11-10 | 2023-05-11 | Peter Sing | Composite stiffener |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2485823A (en) * | 2010-11-25 | 2012-05-30 | Ove Arup & Partners Ltd | Cladding unit |
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- 2008-01-04 WO PCT/US2008/000118 patent/WO2008085890A2/en active Application Filing
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WO2011066174A1 (en) * | 2009-11-24 | 2011-06-03 | Kysor Panel Systems | High strength composite framing members |
US20130277378A1 (en) * | 2010-09-24 | 2013-10-24 | Cesium Holding Ab | Method of producing an enforced delimited element and such an element |
US9156599B2 (en) * | 2010-09-24 | 2015-10-13 | Cesium Holding Ab | Method of producing an enforced delimited element and such an element |
BE1021247B1 (en) * | 2013-08-26 | 2015-09-22 | Oeterbeton | INSULATION WALL FOR CONSTRUCTIONS |
US11181315B2 (en) | 2018-09-25 | 2021-11-23 | Kps Global Llc | Hybrid insulating panel, frame, and enclosure |
US20230141832A1 (en) * | 2021-11-10 | 2023-05-11 | Peter Sing | Composite stiffener |
US11898399B2 (en) * | 2021-11-10 | 2024-02-13 | Peter Sing | Composite stiffener |
Also Published As
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WO2008085890A2 (en) | 2008-07-17 |
WO2008085890A3 (en) | 2008-11-27 |
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