AU613287B2 - Composite panel and processes for making such a panel and a core included in the panel - Google Patents
Composite panel and processes for making such a panel and a core included in the panel Download PDFInfo
- Publication number
- AU613287B2 AU613287B2 AU20756/88A AU2075688A AU613287B2 AU 613287 B2 AU613287 B2 AU 613287B2 AU 20756/88 A AU20756/88 A AU 20756/88A AU 2075688 A AU2075688 A AU 2075688A AU 613287 B2 AU613287 B2 AU 613287B2
- Authority
- AU
- Australia
- Prior art keywords
- core
- tongues
- composite panel
- panel
- sheet
- 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
Links
- 239000002131 composite material Substances 0.000 title claims description 27
- 238000000034 method Methods 0.000 title claims description 18
- 210000002105 tongue Anatomy 0.000 claims description 47
- 239000000463 material Substances 0.000 claims description 14
- 239000000853 adhesive Substances 0.000 claims description 11
- 230000001070 adhesive effect Effects 0.000 claims description 11
- 238000010924 continuous production Methods 0.000 claims description 8
- 229910000838 Al alloy Inorganic materials 0.000 claims description 5
- 230000006835 compression Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 claims description 4
- 229920002635 polyurethane Polymers 0.000 claims description 4
- 239000004814 polyurethane Substances 0.000 claims description 4
- 101100120289 Drosophila melanogaster Flo1 gene Proteins 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 claims 1
- 239000002184 metal Substances 0.000 claims 1
- 238000005452 bending Methods 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000010923 batch production Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005520 cutting process Methods 0.000 description 3
- 238000005187 foaming Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 239000013527 degreasing agent Substances 0.000 description 1
- 238000007688 edging Methods 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000009751 slip forming Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
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
- B32B3/12—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 a layer of regularly- arranged cells, e.g. a honeycomb structure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D47/00—Making rigid structural elements or units, e.g. honeycomb structures
-
- 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
- B32B15/00—Layered products comprising a layer of metal
- B32B15/20—Layered products comprising a layer of metal comprising aluminium or copper
-
- 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
-
- 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
- B32B2311/00—Metals, their alloys or their compounds
- B32B2311/24—Aluminium
-
- 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
- B32B2607/00—Walls, panels
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1007—Running or continuous length work
- Y10T156/1016—Transverse corrugating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T156/00—Adhesive bonding and miscellaneous chemical manufacture
- Y10T156/10—Methods of surface bonding and/or assembly therefor
- Y10T156/1002—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina
- Y10T156/1026—Methods of surface bonding and/or assembly therefor with permanent bending or reshaping or surface deformation of self sustaining lamina with slitting or removal of material at reshaping area prior to reshaping
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/496—Multiperforated metal article making
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49826—Assembling or joining
- Y10T29/49906—Metal deforming with nonmetallic bonding
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/1234—Honeycomb, or with grain orientation or elongated elements in defined angular relationship in respective components [e.g., parallel, inter- secting, etc.]
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/12361—All metal or with adjacent metals having aperture or cut
- Y10T428/12368—Struck-out portion type
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/12—All metal or with adjacent metals
- Y10T428/1241—Nonplanar uniform thickness or nonlinear uniform diameter [e.g., L-shape]
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Laminated Bodies (AREA)
- Panels For Use In Building Construction (AREA)
Description
DEULAKED this Signature. t To: THEn COMMISSIONER OF PATENTSC) 0- g Y ELdwd. Water Sou, rsH PAt+NS/ L/ MtC 0 P.4-J Melbourne,.
IL 0 "e MI' 0 ,rAU-AI-20756/88 P PfWORLD INTELLECTUAL PROPERTY ORGANIZATION PT JInternational Bureau 'INTERNATIONAL APPLICATION PUBLISHEPCN|R Pf N lQ OP ATION TREATY (PCT) (51) International Patent Classification 4 W: )l ter naau bliu n Nimber: WO 89/ 00897 B21D 47/00, B32B 3/12 AI E04C 2/36 (43) International Publication Date: 9 February 1989 (09.02.89) (21) International Application Number: PCT/GB88/00589 (81) Designated States: AT (European patent), AU, BE (European patent), CH (European patent), DE (Euro- (22) International Filing Date: 20 July 1988 (20.07.88) pean patent), DK, FR (European patent), GB (European patent), IT (European patent), JP, LU (European patent), NL (European patent), NO, SE (Euro- (31) Priority Application Number: 8717442 pean patent), US.
(32) Priority Date: 23 July 1987 (23.07.87) Published (33) Priority Country: GB With international search report.
(71) Applicant (for all designated States except US): BRIT- ISH ALCAN ALUMINIUM PLC [GB/GB]; Chalfont Park, Gerrards Cross, Buckingshire SL9 0QB A J.P. 2 0 APR 1989 (72) Inventor; and Inventor/Applicant (for US only) BULLIVANT- A TAA CLARK, Peter, Michael [GB/GB]: 11 Fairfields, AUSTRALIAN Great Kingshill, High Wycombe, Buckinghamshire -1 MAR 1989
(GB).
Agents: LIGHTFOOT, Robert, Oscar et al.: Raworth PATENT OFFICE Moss Cook. 36 Sydenham Road, Croydon, Surrey CRO 2EF (GB).
(54) Title: COMPOSITE PANEL AND PROCESSES FOR MAKING SUCH A PANEL AND A CORE INCLUDED IN THE PANEL 33- Q-4 37 36 -9 42 3 4 (57) Abstract A continuous process for making a core for a composite panel comprising cutting spaced apart tongues in columns from a metallic sheet, the tongues being foldable about base lines in the columns each base line being separated from the next tongue in the column by a web; folding the sheet to form a castellated structure having continuous side walls constituted by the spaces between adjacent columns of tongues with the webs of adjoining rows respectively lying in spaced apart parallel pianes and oppositely folding the tongues of adjoining columns to lie alongside adjacent side walls with their extremities remote from their base lines extending in an appropriate one of the planes. The invention also includes a composite panel comprising the core covered on each side with sheet material as well as a process for making such a panel.
(57) Abstract A continuous process for making a core for a composite panel comprising cutting spaced apart tongues in columns from a metallic sheet, the tongues being foldable about base lines in the columns each base line being separated from the next tongue in the column by a web; folding the sheet to form a castellated structure having continuous side walls constituted by the spaces between adjacent columns of tongues with the webs of adjoining rows respectively lying in spaced apart parallel planes and oppositely folding the tongues of adjoining columns to lie alongside adjacent side walls with their extremities remote from their base lines extending in an appropriate one of t~ie planes. The invention also includes a composite panel comprising the core covered on each side with sheet material as well as a process for making such a panel. i, II:- _L:i cL il- il--- WO 89/00897 PCT/GB88/00589 -1- COMPOSITE PANEL AND PROCESSES FOR MAKING SUCH A PANEL AND A CORE INCLUDED IN THE PANEL FIE~1 OF TNHe INenTo This invention relates to a method of making the metallic core of a composite panel; to a method of making the panel and to a panel using the core.
;DeS~c-R\'p-no op Th-m 5\AO> 'RT In the past it has been usual in the manufacture of composite panels having metallic non-solid cores for both the cores and the resultant panels to be manufactured in batches. Although many kinds of non-solid cores have been used there has been a tendency to favour honeycomb structures as presenting good strength characteristics but these require batch production methods to be used. Both batch production and the use of cores of honeycomb formation are expensive and there is a significant market for cheaper panels having lesser strength characteristics.
SUHHvcUy oF THF 1 IJhrliMT'M It is therefore an object of the present invention to provide an improved method of making a metallic core for a composite panel which can be produced from coiled sheet material in a continuous process, an improved method of making the panel incorporating the core and an improved panel.
According to one aspect of the present invention there is provided a continuous process for making a core for a composite panel comprising cutting spaced apart tongues in columns from a metallic sheet, the tongues being foldable about base lines in the columns each base line being separated from the next tongue in the column by a web; folding the sheet to form a castellated structure having continuous side walls constituted by the spaces between adjacent columns of tongues with the webs of adjoining rows respectively lying in spaced apart parallel planes WO 89/00897 PCT/GB88/00589 -2and oppositely folding the tongues of adjoining columns to lie alongside adjacent side walls with their extremities remote from their base lines extending in an appropriate one of the planes.
Another aspect of the invention provides a process for making a composite panel in which core formed according to the preceding paragraph is passed continuously through profile compression means which closes the side walls closely against the tongues and in which after said means, sheet material from second and third coils is passed respectively on each side of the core and stuck thereto.
The invention also provides a composite panel comprising a core having spaced apart tongues arranged in columns in a metallic sheet, the tongues being folded about base lines in the columns each base line being separated from the next tongue in the column by a web; the sheet being castellated having continuous side walls constituted by the spaces between adjacent columns of tongues with the webs of adjoining rows respectively lying in spaced apart parallel planes and the tongues of adjoining columns lying alongside adjacent side walls with their extremities remote from their base lines extending in an appropriate one of the planes and the core being covered on each side with sheet material stuck thereto.
OF- -7-MC--G~ The above and other aspects of the invention will now be described by way of example with reference to the accompanying drawing in which:- Figure 1 is a diagrammatic view of a machine for continuous production of a core and a composite panel,
IT
NT0 WO 89/00897 PCT/GB88/00589 -3- Figure 2 is a third angle projection of part of a sheet to form a core, Figure 3 is a similar view of a core folded from the sheet of Figure 2 with the tongues crosshatched for clarity, and Figure 4 is a fragmentary view of part of a sheet with a modified tongue shape.
Referring first to Figure 1 this shows a machine for making a .core and composite panel according to the present invention. The machine is arranged for in line intermittent and continuous operation and comprises a first coil. 1 of aluminium alloy mounted on a decoiler 2, sheet 3 from the coil 1 is fed through rollers 4 and successively through an oiler 5 and a shearing station 6 of known type. The sheet 3 then passes through further guide rolls 7 to a known castellation former 8 and a known bending station 9. Because of the nature of shearing, castellation forming and bending it will be understood that the operation of the machine so far described is intermittent.
Turning now to Figure 2 this shows the sheet 3 after passing through the shearing station 6 and having been slit to form tongues 10 each foldable about a notional base line' 11. The tongues are in spaced apart columns such as 12 and 13 extending transversely to the direction of movement of the sheet 3. The base line 11 about which each tongue can be folded is separated from the end extremity 14 of its adjacent tongue by a web 15 and it will be appreciated that with the arrangement of Figure 2 the webs 15 of adjoining columns are in alignment. Each
LV
WO 89/00897 PCT/GB88/00589 -4column such as 12 and 13 is separated by a space 16.
Having passed through the shearing station 6 for slitting the sheet. 3 is then repeatedly folded in the castellation former 8 to form the castellated profile of Figure 3 the folds being along the slit sides of the tongues 10. The tongues 10 of each column such as 12, 13 are now folded up and down such that they close the ends of the castellated profile. The tolerance of the slitting and folding operations are such that the side edges of the tongues contact the continuous side walls 17 of the core which are themselves formed by the spaces 16 of the sheet 3.
It will be seen from Figure 3 that the webs 15 of adjoining columns of tongues 10 such as 12 and 13 in Figure 1 now respectively lie in spaced apart parallel planes represented by the width of the side walls 17 which now constitute the width of the core structure and the extremities 14 of the tongues extend in the plane of one set of the webs Reverting now to Figure 1 when the castellated core, now indicated at 18, leaves the bending station 9 it passes downwardly over a guide roll 19 to be looped at 20 through a degreasing bath 21. From the bath the core passes over a guide roll 22 and through a set of profile compression rolls 23, 24 into a heating chamber 25. It will here be understood that the loop 20 can vary in size to accommodate the intermittent movement of the core 18 leaving the bending station 9 and continuous movement through the rolls 23, 24. It will also be understood that the profile of the core 18 readily allows it to bend around an axis at right angles to its direction of travel.
L II I1 A -I :aT c WO 89/00897 PCT/GB88/00589 The rolls 24 are arranged to rotate more slowly than the rolls 23 so that "bunching" of the castellated core 18 takes place. This is desirable for subsequent formation of a composite panel since both the natural spring in the sheet material and the bending through the degreaser 21 cause the edges of the tongues 10 to move away from the walls 17. From the rolls 24 the bunched core passes into the chamber Second and third coils 26 and 27 of sheet material 28 and 29 are disposed on decoilers 30 and 31. The sheet material may be of plastics but will usually be metallic and of aluminium alloy. The sheet 28 passes over a guide roll 32 and then over a succession of rolls 33, 34, 35, 36 and 37 creating a "box" 38 so that the final strand 39 of the sheet 28 extends horizontally with its inner surface uppermost. From the roll 37 the sheet 28 passes into the heating chamber 25 and is applied to the upper surface of the core 18 at rolls 40, 41. The sheet 29 passes over guide rolls 42, 43 and 44 and then into the heating chamber 25 and is applied to the lower surface of the core 18 at the rolls 40, 41.
Adhesive applicators 45 and 46 are respectively located within the box 38 and on the inner side of the sheet 29 after the roll 44. These applicators drip feed adhesive on to the inner surfaces of both sheets. The preferred adhesive is a water foaming polyurethane which is held in the applicators under an inert atmosphere such as nitrogen. Water jets 47 and 48 apply a fine spray to the adhesive coating just prior to the joining of the sheets 28 and 29 with the core 18 at the rolls 40, 41 so as to promote foaming of the adhesive. Foaming enables the adhesive to spread between the walls 17 of the core 18 so 1. ii J WO 89/00897 PCT/GB88/00589 -6as to engage the side edges of the tongues 10 as well as around the outer edges 14 of the tongues and over the edges of the webs 15. The composite panel 49 thus formed in the heating chamber 25 passes through pinch rolls indicated generally at 50 to consolidate close contact between the core 18 and the sheets 28 and 29. Beyond the chamber 25 the panel 49 is cuit into sections 51 by a flying saw 52.
By using a polyurethane adhesive the temperature within the chamber 25 may be maintained at °50 0 C to 80 0
C
which enables the sheets 28 and 29 to be pre-painted on their outer surface without the paint finish being damaged within the chamber Although the composite panel 49 is preferably formed as described above it will be understood that the continuously formed core 18 could be cut into sections and panels made by batch production techniques. In such case the necessary bunching of the core can be performed in a suitable jig (not shown). Such batch production method is essential for the formation of curved panels using precurved covering sheets. It would also be possible to stick only one of the sheets 28 or 29 to the core 18 in the machine of Figure 1; subsequently bend the partly formed panel in a jig and then apply the other panel.
It is envisaged that panel sections 51 produced in aluminium alloy in the machine of Figure 1 could have a width up to 1600 mm a maximum length of 12 metres. The coils 1, 26 and 27 could be up to 10 tonnes. It is expected that the panels would have a flatness w.ithin a tolerance of 0.4 mm per metre length.
WO 89/00897 PCT/GB88/00589 -7- The results indicate that the performance of the panel is only slightly inferior to that of the honeycomb product when used with the same epoxy adhesive. The choice of the polyurethane adhesive is dictated by cost, by the ease of using the system within an automated line and it has been found to provide a panel of adequate strength.
Once the panel sections 51 have been cut it will be understood that in separate operations various edge closing methods may be employed. These include bending and crimping or sticking excess material of the sheets 28 and 29; incorporating a separate metallic edging member and plugging the edges with a plastics filler.
When the panels are of aluminium alloy it is expected that they will have a total thickness of 10 mm to 25 mm.
Although as described above the tongues 10 are rectangular it will be understood that their side edges could be inclined towards one another so that the walls 17 are also inclined. Figure 4 of the drawings illustrates the limit of this possibility with the tongues 10 being triangular, as at 52. In this case opposed walls 17 would adjoin at the apex of the triangles to provide hollow triangular beams extending transverse to the arrows The excess material 53 could be punched out and wasted or bent to be stuck to the walls 17.
The resultant panel is not as strong as panels having a conventional honeycombed core but nevertheless has a multitude of uses where high strength is not so important, in view of the economy that can be provided by continuous production.
L~~i WO 89/00897 PCT/GB88/00589 1 -8- The strehgth of the core shown in Figure 3 could also be increased for example by staggering the tongues 10 in each column in the sheet 3 so that the webs 15 are not in alignment with one another on opposite sides of the core.
Another modification could be to increase the spacing of the tongues in the columns so that they are long enough for their extremities 14 to be folded over to lie in the planes of the appropriate webs
Claims (12)
- 2. A process according to claim 1 in which facing sheets are secured to the formed core in the same continuous process to form a composite panel.
- 3. A process according to claim 1 in which metal sheet from a first coil is passed intermittently successively through a slitting mechanism for forming the tongues in the plane of the sheet; a castellation former and a tag bender.
- 4. A. process for making a composite panel in which Scla Y\ core formed according to c u is passed continuously through profile compression means which closes the side walls tightly against the tongues and in which after said means, sheet material from second and third coils is passed respectively on each side of the core and stuck thereto. WO 89/00897 PCT/GB88/00589 A process according to claim 4 in which the core and said sheet material is passed through a heated chamber containing pinch rolls for the panel which, in conjunction with the profile compression means, maintains the core with its side walls closed tightly against the tongues.
- 6. A process according to claim 5 in which each sheet material has its outer surface pre-painted and the inner surface is coated with an adhesive before passing through the chamber and the temperature of the latter is sufficiently high to cause the adhesive to set but sufficiently low that the pre-painted surfaces are not damaged.
- 7. A process according to claim 6 in which the temperature is between 50 0 C and 80 0 C.
- 8. A process according to claim 7 in which the adhesive has a polyurethane base.
- 9. A composite panel comprising a core having spaced apart tongues arranged in columns in a metallic sheet, the tongues being folded about base lines in the columns each base line being separated from the next tongue in the column by a web; the sheet being castellated having continuous side walls constituted by the spaces between adjacent ,columns of tongues with the webs of adjoining rows respectively lying in spaced apart parallel planes and the tongues of adjoining columns lying alongside adjacent side walls with their extremities remote from their base lines extending in an appropriate one of the planes and the core being covered on each side with sheet material stuck thereto. FLO 1 F 89/00897 PCT/GB88/00589 -11- A composite panel according to claim 9 in which the sheets are metallic and their outer surfaces are pre-painted.
- 11. A composite panel according to claim 9 in which the core and the outer sheets are of aluminium alloy.
- 12. A continuous process for making a core for a composite panel substantially as herein described with reference to Figures 1, 2, 3 or 4 of the accompanying drawings.
- 13. A described. composite panel substantially as herein
- 14. A process for making a composite panel substantially as herein described with reference to Figures 1, 2, 3 or 4 of the accompanying drawings.
- 15. A machine for forming the composite panel of claims 9, 10 or 11 substantially as herein described with reference to Figure 1 of the accompanying drawings.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8717442 | 1987-07-23 | ||
GB878717442A GB8717442D0 (en) | 1987-07-23 | 1987-07-23 | Composite metallic panel |
PCT/GB1988/000589 WO1989000897A1 (en) | 1987-07-23 | 1988-07-20 | Composite panel and processes for making such a panel and a core included in the panel |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2075688A AU2075688A (en) | 1989-03-01 |
AU613287B2 true AU613287B2 (en) | 1991-07-25 |
Family
ID=26292534
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU20756/88A Ceased AU613287B2 (en) | 1987-07-23 | 1988-07-20 | Composite panel and processes for making such a panel and a core included in the panel |
Country Status (1)
Country | Link |
---|---|
AU (1) | AU613287B2 (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1024889A (en) * | 1950-09-25 | 1953-04-08 | Improvements to hollow composite panels | |
US3112532A (en) * | 1959-01-14 | 1963-12-03 | Nat Gypsum Co | Expandable wall panel |
-
1988
- 1988-07-20 AU AU20756/88A patent/AU613287B2/en not_active Ceased
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1024889A (en) * | 1950-09-25 | 1953-04-08 | Improvements to hollow composite panels | |
US3112532A (en) * | 1959-01-14 | 1963-12-03 | Nat Gypsum Co | Expandable wall panel |
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