Panel with self-adhesive aluminium foil filler

Abstract

The invention relates to the manufacture of a glued honeycomb panel with a filler, which exhibits high rigidity and is intended for use in various fields of industry such as, for example, in construction for preparing building facades, including ventilated facades. The technical result of the invention is the possibility of producing a glued panel with a honeycomb filler, the overall dimensions of which can be determined within a wide range of values, the panel being characterized in that it has high-quality cells and increased resistance to bending and compression while also permitting, if necessary, the free movement of air or other media inside the panel, and reducing the number of manufacturing steps and the labour and energy intensity of panel production, while providing an almost ideal cell geometry. The claimed panel comprises a first face sheet and a second face sheet, between which a honeycomb filler is fastened by means of glue applied to a surface of the first and second face sheets, said honeycomb filler consisting of at least two adjacent surfaces of corrugated strips of aluminium foil.

Description

[0001] PANEL WITH SELF-ADHESIVE FILLER MADE OF ALUMINUM FOIL

[0002] AREA OF TECHNOLOGY

[0003] The present invention relates to a technology for manufacturing glued three-layer structures in the form of panels with a core made of aluminum foil and metal, polymer, and composite facing sheet materials. It also relates to a set of equipment and technological methods for forming the cellular structure of the core and gluing it to the facing sheet materials, the surface of which may be flat or have a specified curvature. The resulting panels are characterized by high resistance to bending and compression and can be used in construction, aerospace engineering, shipbuilding, and the automotive industry.

[0004] LEVEL OF TECHNOLOGY

[0005] Conventional glued honeycomb panels consist of a honeycomb core bonded between two sheet metal or polymer composite facings using epoxy or polyurethane adhesive. The aluminum honeycomb core consists of multiple layers of foil with adhesive strips of a given width, plastically deformed along the adhesive strips so that when adjacent layers are joined, rows of cells of a given geometric shape (hexagonal or rectangular) are formed. Furthermore, after the foil is deformed, the deforming load does not return to its original shape (the deformation force is above the foil's plastic limit).

[0006] The proposed panel, unlike the known one, also consists of a pair of facings of sheet material, between which layers of foil are glued in such a way that they form a cellular structure, however, unlike the known honeycomb panel: a) the layers of foil, when mated with each other, form a cell, being in a stress-strain state, such that after the release of the deforming load, the foil is almost completely straightened, only small areas of the foil remain partially deformed and are fixed in this state after the polymerization of the adhesive; b) the layers of foil do not contain specially applied adhesive strips, while the contacting surfaces of adjacent layers of foil are connected with the same adhesive with which the foil is glued to the facings, and this connection occurs spontaneously due to the lifting of the adhesive from the surface of the facings by the forces of surface tension arising between the closely located (mating) surfaces of adjacent layers of foil;c) the polymerized layer of adhesive on the surface of the facings is spontaneously redistributed by surface tension forces along the line of contact between the foil and the facing in such a way that a high fillet is formed in the contact zone between the foil and the facing, and a thin film of adhesive remains in the center of the cell.

[0007] Moreover, in the proposed panel design, the foil can be oriented along the span line (long side) in such a way that the filler has a maximum shear modulus along the span line and a minimum across it, which contributes to greater rigidity (resistance to bending), especially on short spans, in contrast to the known panel, for which the stretching of the filler into a block is carried out along the direction of the span, along which the shear modulus is minimal.

[0008] Moreover, the proposed panel is characterized by a practically ideal geometric shape (the centers of all cells practically do not deviate from straight lines oriented parallel to each other, the height of the cells is practically the same), in contrast to the cells of the known panel with a honeycomb (6-sided) filler obtained by stretching, which ensures high mechanical characteristics of the panel.

[0009] In this case, the proposed panel with regulation of the adhesive viscosity and the gap size between the mating parts of the wave-shaped tapes can be made either in the version of completely closed cells, when the height of the adhesive rise between the mating elements completely covers the air gap between the tapes, or in the version of a ventilated structure, in the case where the height of the adhesive rise between the mating elements does not completely cover the air gap between the tapes, leaving a through channel for the movement of air or other liquid or gaseous media between the tapes.

[0010] Thus, the proposed panel contains a cellular filler, the metal structure of which differs slightly from the original; unlike the known analogue, there are no strips of special glue, the dimensions of which determine the shape of the cell; the glue connecting the filler with the cladding is concentrated in the joint area, and not evenly distributed over the entire surface, as in the known panel.

[0011] Various methods for producing honeycomb cores are described in the article [Jochen Pflug, Bart Vangrimde, I. Verpoest, P. Bratfisch Honeycomb Core Materials: New Concepts for Continuous Production - Sampe Journal, 2003, 39(6):22-30] and, with respect to the present invention, can be divided into three groups: (a) methods for producing glued core using tools in which the number of cell-forming elements is significantly less than the number of cells in the core; (b) methods for producing glued core using tools in which the number of cell-forming elements is close to the number of cells in the core; (c) methods for producing continuous glued core. The first group includes methods based on gluing sheets with adhesive strips applied to them by printing methods, followed by cutting and forming a cellular structure by stretching.The second group includes methods based on forming a cellular structure by corrugating sheets or strips and gluing them together using a rod-type tool. The third group includes methods of simultaneously folding and gluing a continuous strip into a continuous cellular structure.

[0012] A well-known honeycomb core with a hexagonal cell is produced by gluing layers of foil onto which adhesive strips are imprinted at intervals equal to the width of four adhesive strips, such that the adhesive strips of adjacent layers are offset by half the width of the strip. After gluing the layers, the resulting blank is processed (by cutting or milling) to level its flatness, after which it is stretched, deforming the foil until a cell of the desired shape is achieved. The operations of applying the adhesive strips, assembling the core layers, curing the adhesive, leveling the flatness of the segments, and stretching them into a core block are highly labor-intensive and energy-intensive, and also require specialized complex equipment and specialized production conditions.

[0013] The well-known honeycomb core with a hexagonal cell shape is also obtained by layering a corrugated tape between pins, the cross-section of which determines the shape of the cell and is usually hexagonal or rectangular, after which glue is applied to the protruding parts of the tape and then the next layer of pins and tapes is laid, obtaining after polymerization of the glue a block of filler, ready for gluing the honeycomb panel.

[0014] Preparing the facings for gluing and applying the adhesive can be done in a standard manner, using well-known technologies for liquid adhesive compounds. The facings are degreased (if necessary), then cleaned from the inside, and then a thin layer of two-component adhesive is applied to them manually using an airless spray, a spatula, a roller, or another automated device. The adhesive should be premixed or mixed during application using a mixing attachment.

[0015] In the known method for producing the known panel, the filler is placed between the facings with glue applied to them (or to one of them) and left to polymerize in a hot or cold press, depending on the recommended polymerization modes of the selected brand of glue.

[0016] The closest analogue of the present invention was chosen to be the method described in the book [Bitzer T. Honeycomb technology: materials, design, manufacturing, applications and testing. Kluwer Academic Pub; 1997] for producing packages and segments of glued honeycomb filler (with a hexagonal cell) for subsequent stretching into a block, which includes the following steps:

[0017] 1) degreasing the foil and drying it if necessary, 2) applying adhesive strips across the direction of unwinding and drying them until they lose their stickiness,

[0018] 3) cutting the tape with adhesive strips into sheets (or folding the tape like an accordion),

[0019] 4) making assembly holes in sheets,

[0020] 5) folding the pieces of tape (sheets) into a stack using the assembly holes,

[0021] 6) placing the foot in a press and gluing with heating and holding under pressure,

[0022] 7) trimming and cutting the package into slices.

[0023] This method is characterized by the following disadvantages: a) Low quality of sheet assembly and, accordingly, low quality of the cell of the resulting filler, caused by random uncontrolled displacements of sheets relative to each other due to the non-flatness of sections of the tape (sheets); b) Deterioration in the quality of the filler cell as the number of layers in the stack increases, caused by an increase in the amplitude of mutual displacements of sheets due to the accumulation of non-flatness of the assembly of sheets in the stack; c) Excessive pressure to compensate for the elasticity of the stack of sheets and to ensure tight pressing of adjacent layers of the stack; d) Additional waste of material formed by parts of the stack that contain assembly holes, the presence of which on a filler segment is unacceptable.

[0024] DISCLOSURE OF THE INVENTION

[0025] The proposed method for producing panels with cellular filler relates to methods that use equipment for producing filler, the number of forming elements of which is close to the number of cells of the resulting filler.

[0026] The objective of the invention is to develop a method for producing a glued panel with a filler made of a narrow strip of aluminum foil and a set of automated equipment for its production.

[0027] The technical result of the invention is the possibility of obtaining a glued panel with a cellular filler with overall dimensions specified in a wide range of values, high cell quality, increased resistance to bending and compression, while ensuring, if necessary, the movement of air or other media inside the panel.

[0028] Another technical result is a significant reduction in the number of technological operations, labor intensity (by 2 times) and energy intensity (by more than 10 times) of panel production while achieving virtually ideal cell geometry quality.

[0029] The stated problem is solved, and the technical result is achieved by the fact that the panel contains first and second facing sheet material, between which, using a layer of adhesive applied to the surfaces of the first and second facing material, a cellular filler made of at least two adjacent surfaces of corrugated strips of aluminum foil is fixed.

[0030] The cellular filler is formed from a wavy strip with a half-period equal to the length of the cell, arranged relative to each other in such a way that they form a structure consisting of closed or open cells.

[0031] The polymerized layer of adhesive in the contact zone of the foil with the facing sheet material is made in the form of a high fillet, and in the center of the cell it is made in the form of a thin film.

[0032] The corrugated strips that form the cellular core are oriented along the short or long side of the panel.

[0033] The panel has a high quality filler geometry, with the centers of adjacent filler cells located on the same line and the cell diameter being the same.

[0034] A through space is created between the contacting surfaces of adjacent corrugated aluminum foil strips.

[0035] The stated problem is solved, and the technical result is achieved by the fact that the method for obtaining the panel described above contains the following steps:

[0036] - forming a cellular filler structure from a pre-treated aluminum foil strip in a forming tool that forms at least one row of cells composed of two adjacent strips of corrugated tape;

[0037] - applying a layer of glue to the surface of the first facing sheet material, previously prepared for gluing;

[0038] - installation of a forming tool with a cellular filler on the surface of the first facing sheet material with a layer of glue;

[0039] - gluing the ends of the corrugated strips of cellular filler made of aluminum foil to the first facing sheet material until the adhesive is completely polymerized in the cold or hot curing mode under a load that ensures a tight fit of the ends of the filler to the first facing sheet material;

[0040] - removal of the forming equipment from the cellular filler glued to the first facing sheet material;

[0041] - applying a layer of glue to the surface of the second facing sheet material, previously prepared for gluing;

[0042] - installation of a cellular filler with a first facing sheet material on the surface of a second facing sheet material with a layer of adhesive, so that the ends of the filler touch the surface of the second facing sheet material with a layer of adhesive; - gluing the second facing sheet material to the ends of the corrugated strips of aluminum foil of the cellular filler until complete polymerization of the adhesive in the cold or hot curing mode under a load that ensures tight adhesion of the ends of the filler to the second facing sheet material.

[0043] A cellular filler structure is formed from corrugated strips of aluminum foil, arranged relative to each other in such a way that they form a structure consisting of closed or open cells.

[0044] In accordance with the first embodiment of the invention, in the method for producing a panel, in which an Fl-shaped profile is used as the shaping elements, to form the structure of a cellular filler from at least two wavy strips of aluminum foil, with a width equal to the height of the cellular filler, the strips of aluminum foil, unwound from a reel, are fixed in a shaping tool in the form of a U-shaped profile, containing at least two vertical walls, with a thickness of the vertical wall of the profile less than 0.3 mm, with a vertical wall height of 30-70% of the filler height, an internal width equal to half the height of the cell being formed minus the thickness of the foil and the base with a deviation from flatness along the length no worse than the thickness of the adhesive layer, and a rigging of at least two adjacent U-shaped profiles with a corrugated tape laid in them is installed on the first facing sheet material with a layer of adhesive applied to it, ensuring a tight fit of the ends of the said tape to the first facing sheet material and subsequent gluing of the said ends after complete polymerization of the adhesive, wherein the adjacent U-shaped profiles forming the shaping rigging are installed on a sheet of the first facing sheet material with a layer of adhesive applied to it, with a gap between them so that a gap of at least 0 in width is formed between the adjacent contacting surfaces of the corrugated tapes of aluminum foil.6 mm, forming a through space, or supporting adjacent U-shaped profiles, forming a shaping tool, are installed on a sheet of the first facing sheet material with a layer of glue applied to it, close to each other so that between the adjacent contacting surfaces of the corrugated tapes of aluminum foil a gap is formed equal to the thickness of two walls of the shaping profile, which is completely or partially filled with glue, with which the filler is glued to the sheet of the first facing sheet material.

[0045] In accordance with the first embodiment of the invention, the formation of the structure of the cellular filler from corrugated strips of aluminum foil is carried out on the basis of the following options: Option 1 (CYLINDER).The formation of a cellular filler structure from corrugated strips of aluminum foil using a U-shaped profile containing a group of cylindrical pins, wherein adjacent pins are lowered on different sides of a vertical axis, is carried out by installing along the axis of the U-shaped profile a strip of aluminum foil unwound from a reel, followed by sequentially lowering the pins one by one on different sides of the strip, ensuring tension and formation of the corrugated strip when the pins are fixed in the lowered position, wherein in order to form the next section of the corrugated strip of aluminum foil, after fixing the last pin in the group of pins and fixing the free cut end of said strip, the previous pins are lifted and moved into the adjacent U-shaped profile to form the corrugated strip, after which the above-described operations for forming the next adjacent section of the corrugated strip of aluminum foil are repeated.

[0046] Option 2 (ROLLERS). The formation of a cellular filler structure from corrugated strips of aluminum foil using a U-shaped profile containing a group of a pair of rollers rotating in different directions, located above the profile wall and moving along the U-shaped profile, is carried out by fixing the free end of the strip of aluminum foil unwound from a reel at one end of the U-shaped profile, with subsequent pulling of said strip between a pair of said rotating rollers moving along the U-shaped profile as the corrugated profile of the strip is formed, in the direction opposite to the direction in which the wave is formed, with subsequent fixing of the other cut free end of said strip at the other end of the profile, wherein to form the next adjacent section of the corrugated strip of aluminum foil, the free end of the strip of aluminum foil unwound from a reel is moved into the adjacent U-shaped profile and the above-described operations are repeated.

[0047] In accordance with a second embodiment of the invention, in a method for producing a panel in which a system of pins is used as shaping elements, for forming a structure of a cellular filler from at least two corrugated strips of aluminum foil, the width of which is equal to the height of the filler, the strips of aluminum foil are fixed in a shaping tooling in the form of at least two adjacent beams, with rows of guide pins of circular or rectangular cross-section, spaced from each other at a distance equal to a half-period of a wave, with a pin height of 30-70% of the height of the filler, and the tooling in the form of at least two adjacent beams with a corrugated strip laid in them is installed on the first facing sheet material with a layer of adhesive applied thereto, ensuring a tight fit of the ends of said strip to the first facing sheet material, and subsequent gluing of said ends is carried out after complete polymerization of the adhesive,wherein the adjacent beams are still installed with a gap between them so that between the adjacent contacting surfaces of the corrugated strips of aluminum foil a gap of at least 0.6 mm in width is formed, forming a through space, or the form-forming adjacent beams are installed close to each other so that between the adjacent contacting surfaces of the corrugated strips of aluminum foil a gap of less than 0.6 mm is formed, and the formed gap is filled completely or partially with glue, with which the filler is glued to the facing sheet materials.

[0048] In accordance with the second embodiment of the invention, the formation of the structure of the cellular filler from corrugated strips of aluminum foil is carried out on the basis of the following options:

[0049] Option 1 (TUNE FORK 1). Formation of a cellular filler structure from at least two wavy aluminum foil tapes, with a width equal to the filler height, in which the wavy aluminum foil tapes are fixed in a forming tooling in the form of at least two adjacent beams, with rows of pairs of guide pins of circular or rectangular cross-section mounted on rotating platforms, with a pin height of 30-70% of the filler height, is carried out by fixing at one end of a beam with a width of at least half the cell height, with a length not less than the panel length, the free end of an aluminum foil tape unwound from a reel and passing between pairs of guide pins mounted on rotating platforms that are mounted on the said beam, after which the platforms with pairs of pins are successively rotated around the axes at an angle ensuring the formation of a wavy surface of the tape, with subsequent fixation of each pair of pins in a rotated position, wherein,to form the next adjacent section of the corrugated tape of aluminum foil, the above-described operations are repeated, after which the corrugated tape is transferred from the forming equipment to the supporting equipment in the form of a beam with fixed pins or in the form of a U-profile to maintain the shape of the tape when gluing the ends of the tape to the first facing sheet material, then the pins on the rotating platforms are returned to their original position, after which the supporting equipment with the corrugated tape laid in it is installed on the first facing sheet material with a layer of glue applied to it, ensuring a tight fit of the ends of the said tape to the first facing sheet material by the weight of the equipment supporting the shape of the tape and subsequent gluing of the said ends after complete polymerization of the glue, wherein the forming adjacent beams are installed with a gap between them so that a gap is formed between the adjacent contacting surfaces of the corrugated tapes of aluminum foil,with a width of at least 0.6 mm, forming a through space, or the form-forming adjacent beams are installed close to each other, so that between the adjacent contacting surfaces of the corrugated strips of aluminum foil a gap of less than 0.6 mm is formed, and the formed gap is filled completely or partially with glue, with which the filler is glued to the facing sheet materials.

[0050] Option 2 (PENDULUM). The formation of the cellular filler structure using a forming tool in the form of at least two beams with fixed guide pins is carried out by fixing the free end of a strip of aluminum foil unwound from a reel to one end of the beam, followed by pulling said strip between the guide pins, by performing pendulum movements with the grip while moving along the beam with pins, through the frame of which said strip is passed, ensuring the formation of a wavy profile of the aluminum foil strip, and fixing the free cut end of said strip, while to form the next adjacent section of the wavy strip of aluminum foil, said strip is moved into the adjacent beam and the above-described operations are repeated.

[0051] Option 3 (GEAR). The formation of the structure of the cellular filler using a forming tool in the form of at least two beams equipped with a gear and containing a group of holes with lowered guide pins of a circular or rectangular cross-section, with the guide pins located between them and fixed in a raised position, is carried out by fixing the free end of a tape of aluminum foil, unwound from a reel, at one end of the beam, with subsequent pulling of said tape between the gear with a raised guide pin, which is raised vertically upward after the tape of aluminum foil is inserted behind the hole with the lowered pin, ensuring the formation of a wavy tape of aluminum foil, wherein after the last pin in the row is extended, the free cut end of said wavy tape is fixed, while for the formation of the next adjacent section of wavy tape of aluminum foil, the above-described operations are repeated.

[0052] Option 4 (FRAME). Formation of the cellular filler structure using a forming tool in the form of a plurality of adjacent beams containing a plurality of pairs of guide pins, wherein one of the beams is movable, and each even beam is fixed, along the edges of which guide pins are installed. The formation of the cellular filler structure is carried out by laying strips of aluminum foil, unwound from a reel, across the beams between the guide pins, with subsequent movement of the movable beams along the fixed beams, ensuring the formation of a wavy strip of aluminum foil.

[0053] Option 5 (PIANO). Formation of a cellular filler structure from at least two wavy strips of aluminum foil, with a width equal to the height of the filler, in which the strips of aluminum foil are fixed in a forming tooling in the form of at least two adjacent beams containing fixed guide pins of a circular or rectangular cross-section with a length of at least 25% of the width of the strip and no more than the width of the strip minus the thickness of the adhesive layer on the facing sheet material, located along one line at a distance relative to each other equal to the period of the formed wave, and movable hammer pins, wherein the formation of the cellular filler structure is carried out by fixing at one end of the beam with a width of at least half the height of the cell, with a length not less than the length of the panel, the free end of the strip of aluminum foil, unwound from a reel, and located in a taut state above the said fixed guide pins,and subsequent sequential lowering onto the aluminum foil tape in the plane in the middle between the fixed guide pins of the movable hammer pins to a lowering depth equal to half the diameter of the filler cell, ensuring the formation of a wavy tape of aluminum foil, wherein after the formation of the wavy tape of aluminum foil, the wavy tape is transferred from the forming equipment to the supporting equipment in the form of a beam with fixed pins to maintain the shape of the wavy tape when gluing the ends of the tape to the first facing sheet material, while to form the next adjacent section of the wavy tape of aluminum foil, the above-described operations are repeated, and the supporting equipment in the form of at least two adjacent beams with the wavy tape laid in them is installed on the first facing sheet material with a layer of glue applied to it,ensuring a tight fit of the ends of the said corrugated tape to the first facing sheet material by the weight of the beams supporting the shape of the tape, and subsequent gluing of the said ends after complete polymerization of the adhesive, wherein the adjacent shaping beams are installed with a gap between them such that a gap of at least 0.6 mm in width is formed between the adjacent contacting surfaces of the corrugated tapes of aluminum foil, forming a through space, or the adjacent shaping beams are installed close to each other such that a gap of less than 0.6 mm is formed between the adjacent contacting surfaces of the corrugated tapes of aluminum foil, wherein the formed gap is filled completely or partially with adhesive, with which the filler is glued to the facing sheet materials. Option 6 (KAMERTON 2). Formation of the structure of the cellular filler using a forming tool in the form of at least two beams, with rows of a pair of guide pins of round or rectangular cross-section,mounted on rotating platforms, wherein the formation of the structure of the cellular filler is carried out by fixing at one end of a beam with a width of not less than half the height of the cell, with a length not less than the length of the panel, the free end of a tape of aluminum foil, unwound from a reel, and passing between pairs of guide pins installed on rotating platforms, which are mounted on the said beam, after which the platforms with pairs of guide pins are sequentially rotated around the axes at an angle that ensures the formation of a wavy surface of the tape, with the subsequent fixation of each pair of guide pins in a rotated position, wherein, to form the next adjacent section of the wavy tape of aluminum foil, the above-described operations are repeated, wherein the forming adjacent beams are installed with a gap between them so that a gap of at least 0.6 mm in width is formed between the adjacent contacting surfaces of the wavy tapes of aluminum foil,forming a through space, or the form-forming adjacent beams are installed close to each other, so that between the adjacent contacting surfaces of the corrugated strips of aluminum foil a gap of less than 0.6 mm is formed, and the formed gap is filled completely or partially with glue, with which the filler is glued to the facing sheet materials.

[0054] BRIEF DESCRIPTION OF DRAWINGS

[0055] The present invention is disclosed further in the text in more detail with the help of graphic materials in Figs. 1-9, which show:

[0056] Fig. 1 - Scheme for obtaining a panel with a structural filler.

[0057] Fig. 2 - Assembly of filler from tapes of aluminum foil in a wavy shape: a) tape of aluminum foil in a wave shape; b) structure of cellular filler from a plurality of tapes of aluminum foil in a wave shape.

[0058] Fig. 3 - Formation of a wave from a tape using movable vertical pins in a U-profile (cylinder).

[0059] Fig. 4 - Formation of a wave from a tape in a U-profile by extrusion with rollers (rollers).

[0060] Fig. 5 - Formation of a wave from a tape by turning paired vertical pins (Tuning fork): a) a tape of aluminum foil installed between paired vertical pins; b) a tape of aluminum foil with a formed profile in the shape of a wave.

[0061] Fig. 6 - Formation of a wave by pendulum-like movement of the tape between vertical pins (Pendulum). Fig. 7 - Formation of a wave from the tape by a specially shaped gear (Gear).

[0062] Fig. 8 - Formation of a wave from a tape using a system of movable beams with vertical pins (Frame): a) tapes of aluminum foil fixed in a forming device consisting of a plurality of beams; b) tape of aluminum foil with a formed profile in the form of a wave in a forming device consisting of a plurality of beams.

[0063] Fig.9 - Formation of a wave from a tape by hammers passing between fixed pins (Piano): a) formation of a wavy profile of the tape; b) supporting equipment in the form of a beam with fixed pins before receiving the wavy tape; c) transfer of the wavy tape to the supporting equipment in the form of a beam with fixed pins.

[0064] 1 - the operation of preparing the filler material for gluing, including cutting it into strips of the required width and, if necessary, degreasing the strips, 2 - the operation of inserting the strip into the tooling for forming the filler, 3 - the operation of preparing the facing sheet materials for gluing, including degreasing and cleaning the surface, 4 - the operation of forming the cellular structure of the filler in the tooling, 5 - the operation of applying glue to the surface of the first facing sheet material, 6 - the operation of gluing the filler in the forming tooling to the first facing sheet material, 7 - the operation of removing the forming tooling from the filler glued to the first facing sheet material, 8 - the operation of applying glue to the surface of the second facing sheet material,

[0065] 9 - the operation of gluing the second facing sheet material to the filler;

[0066] 10 - corrugated belt, 11 - cellular filler structure formed by conjugating corrugated belts; 12 - cylindrical pins, 13 - U-shaped profile; 14 - reel with belt before forming, 15 - rollers; 16 - paired pins on rotating platforms with paired pins; 17 - beam with paired pins; 18 - belt before forming; 19 - beam with guide pins; 20 - guide pins; 21 - grip performing pendulum motion; 22 - gear; 23 - movable beam with guide pins; 24 - fixed beam with guide pins; 25 - movable hammer pins; 26 - supporting equipment in the form of a beam with fixed guide pins; 27 - mechanism for transferring the tape from the forming tool to the supporting equipment; 28 - beam equipped with a gear; 29 - hole with a lowered pin.

[0067] IMPLEMENTATION OF THE INVENTION

[0068] The claimed panel, containing first and second facing sheet material, between which, using a layer of glue (epoxy or polyurethane) applied to the surfaces of the first and second facing material, a cellular filler made of at least two adjacent surfaces of corrugated strips (10) of aluminum foil is secured, is obtained in the following manner.

[0069] At the first stage, operations are carried out to prepare the filler material for gluing, including cutting the aluminum foil into strips (18) of the required width and, if necessary, degreasing the strips (18), with subsequent winding of the aluminum foil strip into a roll. Then, a structure (11) of cellular filler is formed from the pre-treated strip (18) of aluminum foil in a forming tool that forms at least one row of cells composed of two adjacent strips of wavy tape (10), whereby a structure (11) is formed consisting of closed or open cells. After which a layer of adhesive is applied to the surface of the first facing sheet material pre-prepared for gluing. Then, the forming tool with the cellular filler is installed on the surface of the first facing sheet material with a layer of adhesive.The ends of the corrugated strips (10) of cellular aluminum foil core are then bonded to the first facing sheet material until the adhesive fully polymerizes in a cold or hot curing mode under a load, ensuring a tight fit between the ends of the core and the first facing sheet material. The forming tool is then removed from the cellular core bonded to the first facing sheet material. A layer of adhesive is then applied to the surface of the second facing sheet material, which has been pre-prepared for bonding. The cellular core and the first facing sheet material are then positioned on the surface of the second facing sheet material with the adhesive layer, such that the ends of the core touch the surface of the second facing sheet material with the adhesive layer.At the final stage, the second facing sheet material is glued to the ends of the corrugated strips (10) of aluminum foil of the cellular filler until the adhesive is completely polymerized in the cold or hot curing mode under a load, ensuring a tight fit of the ends of the filler to the second facing sheet material.

[0070] The cellular filler is formed from a wavy strip (10) with a half-period equal to the length of the cell, arranged relative to each other in such a way that they form a structure (11) consisting of closed or open cells.

[0071] The polymerized layer of adhesive in the contact zone of the foil with the facing sheet material is made in the form of a high fillet, and in the center of the cell it is made in the form of a thin film.

[0072] The wavy strips (10) that form the cellular core are oriented along either the short or long side of the panel. The panel has high-quality core geometry, with the centers of adjacent core cells aligned and the cell diameters identical.

[0073] Between the contacting surfaces of adjacent corrugated tapes (10) of aluminum foil, a through space is formed.

[0074] A wide range of sheet materials made of steel, aluminum and titanium alloys, polymer composite materials (carbon fiber reinforced plastic, fiberglass, textolite), glued wood chip materials (plywood, fiberboard, chipboard, MDF), and translucent materials (glass, plexiglass) are used as cladding sheet material.

[0075] In accordance with the first embodiment of the invention (Fig. 3, 4), in the method for producing a panel, in which a U-shaped profile (13) is used as the shaping elements, to form a structure (11) of cellular filler from at least two wavy strips (10) of aluminum foil, with a width equal to the height of the cellular filler, strips (18) of aluminum foil, unwound from a reel (14), are fixed in a shaping tool in the form of a U-shaped profile (13), containing at least two vertical walls, with a thickness of the vertical wall of the profile less than 0.3 mm, the height of the vertical wall of 30-70% of the filler height, the internal width equal to half the height of the formed cell minus the thickness of the foil and a base with a deviation from flatness along the length not worse than the thickness of the adhesive layer, and the equipment from at least two adjacent U-profiles (1) with a corrugated tape (10) laid in them is installed on the surface of the first facing sheet material with a layer of glue applied to it, ensuring a tight fit of the ends of the said tape (10) to the first facing sheet material and subsequent gluing of the said ends after complete polymerization of the glue, while the adjacent U-shaped profiles (13), forming the forming equipment, are installed on a sheet of the first facing sheet material with a layer of glue applied to it, with a gap between them so that between the adjacent contacting surfaces of the corrugated tapes (10) of aluminum foil a gap of a width of at least 0.6 mm, forming a through space, or supporting adjacent U-shaped profiles (13), forming a shaping tool, are installed on the surface of the first facing sheet material with a layer of adhesive applied thereto, close to each other, so that a gap equal to the thickness of two walls of the shaping profile is formed between the adjacent contacting surfaces of the corrugated strips (10) of aluminum foil, which is completely or partially filled with adhesive, with which the filler is glued to the facing sheet material. In accordance with the first embodiment of the invention, the formation of the cellular filler structure from corrugated strips of aluminum foil is carried out based on the following options:.

[0076] Option 1 (CYLINDER). Formation of a structure (11) of cellular filler (Fig. 3) from corrugated strips (10) of aluminum foil using a U-shaped profile

[0077] (13), containing a group of cylindrical pins, wherein adjacent cylindrical pins (12) are lowered on different sides of the vertical axis, is carried out by installing along the axis of the U-shaped profile (13) a tape (18) of aluminum foil unwound from a reel (14), followed by sequentially lowering the cylindrical pins (12) on different sides of the tape, ensuring tension and the formation of a wavy tape (18) when fixing the cylindrical pins (12) in the lowered position.In this case, to form the next section of the wavy tape (10) of aluminum foil, after fixing the last cylindrical pin (12) in the group of cylindrical pins and fixing the free cut end of said tape (10), the previous cylindrical pins (12) are lifted and moved into the adjacent U-shaped profile (13) to form the wavy tape (10) of aluminum foil, after which the above-described operations for forming the next adjacent section of the wavy tape (10) of aluminum foil are repeated.

[0078] Option 2 (ROLLERS). The formation of the structure (11) of the cellular filler (Fig. 4) from corrugated tapes (10) of aluminum foil using a U-shaped profile (13) containing a group of a pair of rollers (15) rotating in different directions, located above the wall of the U-shaped profile (13) and moving along the U-shaped profile (13), is carried out by fixing at one end of the U-shaped profile (13) the free end of the tape (18) of aluminum foil unwound from a reel

[0079] (14), followed by pulling said tape (18) between a pair of said rotating rollers (15) moving along the U-shaped profile (13) as the wavy tape (10) is formed, in the direction opposite to the direction in which the wave is formed, followed by fixing the other cut free end of said tape (18) at the other end of the profile, wherein to form the next adjacent section of the wavy tape (10) of aluminum foil, the tape (18) is moved into the adjacent U-shaped profile (13) and the above-described operations are repeated.

[0080] In accordance with a second embodiment of the invention (Fig. 5-9), in the method for producing a panel, in which a system of pins is used as shaping elements, to form a structure (11) of a cellular filler from at least two corrugated strips (10) of aluminum foil, the width of which is equal to the height of the filler, the strips (18) of aluminum foil are fixed in a shaping tool in the form of at least two adjacent beams (17, 19, 23-24), with rows of guide pins (20) of circular or rectangular cross-section, spaced from each other at a distance equal to a half-period of a wave, with a height of pins (20) of 30-70% of the height of the filler, and the tooling in the form of at least two adjacent beams 17, 19, 23-24) with a corrugated strip (10) laid in them is installed on the surface of the first facing sheet material with a layer of glue, ensuring a tight fit of the ends of the said tape (10) to the first facing sheet material,and subsequent gluing of said ends is carried out after complete polymerization of the adhesive, wherein the adjacent beams (17, 19, 23-24) are still installed with a gap between them so that between the adjacent contacting surfaces of the corrugated tapes (10) of aluminum foil a gap of at least 0.6 mm in width is formed, forming a through space, or the form-forming adjacent beams (17, 19, 23-24) are installed close to each other so that between the adjacent contacting surfaces of the corrugated tapes (10) of aluminum foil a gap of less than 0.6 mm is formed, wherein the formed gap is filled completely or partially with adhesive, with which the filler is glued to the facing sheet materials.

[0081] In accordance with the second embodiment of the invention, the formation of the structure of the cellular filler from corrugated strips of aluminum foil is carried out on the basis of the following options:

[0082] Option 1 (TUNING FORK 1). The formation of a structure (11) of a cellular filler (Fig. 5) from at least two wavy strips (10) of aluminum foil, with a width equal to the height of the filler, in which the wavy strips (10) of aluminum foil are fixed in a forming tooling in the form of at least two adjacent beams (17) mounted on rotating platforms (16) with rows of pairs of guide pins (20) of circular or rectangular cross-section, with a height of pins (20) of 30-70% of the height of the filler, is carried out by fixing at one end of a beam (17) with a width of at least half the height of a cell, a length of at least the length of the panel, the free end of a strip (18) of aluminum foil, unwound from a reel (14), and passing between pairs of guide pins (20) mounted on rotating platforms (16), which are mounted on the said beam (19), after which a sequential rotation of the platforms (16) is carried out with pairs of guide pins (20) around the axes at an angle,providing the formation of a corrugated tape (10), with the subsequent fixation of each pair of guide pins (20) in a rotated position, wherein, to form the next adjacent section of the corrugated tape (10) of aluminum foil, the above-described operations are repeated, after which the corrugated tape (10) is transferred from the forming equipment to the supporting equipment in the form of a beam with fixed pins or in the form of a U-profile to maintain the shape of the tape when gluing the ends of the tape (10) to the surface of the first facing sheet material, then the guide pins (20) on rotating platforms are returned to their original position, after which the supporting equipment with the corrugated tape (10) laid in it is installed on the surface of the first facing sheet material with a layer of glue applied to it,providing a tight fit of the ends of the said tape (10) to the first facing sheet material by the weight of the shape-supporting tape (10) of the equipment and subsequent gluing of the said ends after complete polymerization of the adhesive, wherein the adjacent shaping beams (17) are installed with a gap between them so that between the adjacent contacting surfaces of the corrugated tapes (10) of aluminum foil a gap of at least 0.6 mm in width is formed, forming a through space, or the adjacent shaping beams (17) are installed close to each other so that between the adjacent contacting surfaces of the corrugated tapes (10) of aluminum foil a gap of less than 0.6 mm is formed, wherein the formed gap is filled completely or partially with adhesive, with which the filler is glued to the facing sheet materials.,

[0083] Option 2 (PENDULUM). The formation of the structure (11) of the cellular filler (Fig. 6) using a forming tool in the form of at least two beams (19) with fixed guide pins (20) is carried out by fixing the free end of the tape (18) of aluminum foil unwound from a reel (14) at one end of the beam (19), followed by pulling said end of the tape (18) between the guide pins, by performing pendulum movements with the grip (21) when moving along the beam (19) with guide pins (20), through the frame of which said tape (18) is passed, ensuring the formation of a wavy tape (10) of aluminum foil, and fixing the free cut end of said tape (10), while to form the next adjacent section of the wavy tape (10) of aluminum foil, the free end of the tape (18) of aluminum foil unwound from a reel (14) is moved in adjacent beam (19) and the above operations are repeated.

[0084] Option 3 (GEAR). The formation of the structure (11) of the cellular filler (Fig. 7) using a forming tool in the form of at least two beams (28) equipped with a gear (22) and containing a group of openings (29) with lowered guide pins (20) of circular or rectangular cross-section, with guide pins (20) located between them, fixed in a raised position, is carried out by fixing the free end of the tape (18) of aluminum foil, unwound from a reel (14), at one end of the beam, with subsequent pulling of the said tape (18) between the gear (22) with a raised guide pin (20), which is raised vertically upward after the tape (18) of aluminum foil is inserted behind the opening (29) with the lowered guide pin (20), ensuring the formation of a wavy tape (10) of aluminum foil, and after the extension of the last guide pin (20) in the row fix the free cut end of the said corrugated tape (10),in this case, to form the next adjacent section of the corrugated tape (10) of aluminum foil, the above-described operations are repeated.

[0085] Variant 4 (FRAME). Formation of the structure (11) of the cellular filler (Fig. 8) using forming equipment in the form of a plurality of adjacent beams (23, 24) containing a plurality of pairs of guide pins (20), wherein one of the beams is movable (23), and each even beam is fixed (24), along the edges of which guide pins are installed, and the formation of the structure (11) of the cellular filler is carried out by laying strips (18) of aluminum foil, unwound from a reel (14), across the beams (23, 24) between the guide pins (20), with subsequent movement of the movable beams (23) along the fixed beams (24), ensuring the formation of a wavy strip (10) of aluminum foil.

[0086] Option 5 (PIANO). Formation of a structure (11) of a cellular filler (Fig. 9) from at least two wavy strips (10) of aluminum foil, with a width equal to the height of the filler, in which the wavy strips (10) of aluminum foil are fixed in a forming tooling in the form of at least two adjacent beams (19) containing fixed guide pins (20) of a circular or rectangular cross-section with a length of at least 25% of the width of the strip and no more than the width of the strip minus the thickness of the adhesive layer on the facing sheet material, located along one line at a distance relative to each other equal to the period of the wave being formed, and movable hammer pins (25), wherein the formation of the structure (11) of the cellular filler is carried out by fixing at one end of the beam (19) with a width of at least half the height of the cell, with a length of at least the length of the panel, the free end of the strip (18) of aluminum foil unwound from a reel (14),and located in a taut state above the said fixed guide pins (20), and subsequent sequential lowering onto the tape (18) of aluminum foil in the plane in the middle between the fixed guide pins (20) of the movable hammer pins (25) to a lowering depth equal to half the diameter of the filler cell, ensuring the formation of a wavy tape (10) of aluminum foil, wherein after the formation of the wavy tape (10) of aluminum foil, the wavy tape (10) is transferred from the forming equipment to the supporting equipment (26) in the form of a beam with fixed pins to maintain the shape of the wavy tape (10) when gluing the ends of the wavy tape to the first facing sheet material, while for the formation of the next adjacent section of the wavy tape (10) of aluminum foil, the above-described operations are repeated,and the supporting equipment (26) in the form of at least two adjacent beams with a corrugated tape (10) laid in them is installed on the surface of the first facing sheet material with a layer of glue applied to it, ensuring a tight fit of the ends of the said corrugated tape (10) to the first facing sheet material by the weight of the beams supporting the shape of the corrugated tape (10), and subsequent gluing of the said ends after complete polymerization of the glue, wherein the shaping adjacent beams (19) are installed with a gap between them so that between the adjacent contacting surfaces of the corrugated tapes (10) of aluminum foil a gap of at least 0.6 mm in width is formed, forming a through space, or the shaping adjacent beams (19) are installed close to each other so that between the adjacent contacting surfaces of the corrugated tapes (10) of aluminum foil a gap of less than 0.6 mm is formed, wherein the resulting gap is filled completely or partially with glue,which the filler is glued to the facing sheet materials.

[0087] Option 6 (TUNING FORK 2). Formation of a structure (11) of a cellular filler (Fig. 5) using a forming tool in the form of at least two beams (17), with rows of a pair of guide pins (20) of a circular or rectangular cross-section, mounted on rotating platforms (16), wherein the formation of the structure (11) of the cellular filler is carried out by fixing at one end of the beam (17) with a width of not less than half the height of the cell, a length not less than the length of the panel, the free end of a tape (18) of aluminum foil, unwound from a reel (14), and passing between pairs of guide pins (20), mounted on rotating platforms (16), which are mounted on the said beam (17), after which a sequential rotation of the platforms (16) with pairs of guide pins around the axes is carried out at an angle ensuring the formation of a wavy tape (10), with subsequent fixation of each pair of guide pins (20) in a rotated position, wherein,to form the next adjacent section of the corrugated tape (10) of aluminum foil, the above-described operations are repeated, wherein the adjacent forming beams (17) are installed with a gap between them so that between the adjacent contacting surfaces of the corrugated tapes (10) of aluminum foil a gap of at least 0.6 mm in width is formed, forming a through space, or the adjacent forming beams (17) are installed close to each other so that between the adjacent contacting surfaces of the corrugated tapes (10) of aluminum foil a gap of less than 0.6 mm is formed, wherein the formed gap is filled completely or partially with glue, with which the filler is glued to the facing sheet materials.

[0088] Example To obtain the claimed panel 1200 mm wide, 2400 mm long, 22 mm high, containing a structure (11) of cellular filler made of corrugated strips (10) of AMts grade aluminum foil 50 μm thick with a cell diameter of 8 mm, located between the first and second facing sheet materials 1 mm thick made of AMg2M aluminum alloy, the following sequential operations are carried out. At the first stage, the foil rolls are cut into strips (18) 20 mm wide with winding onto reels on spools with an outer diameter of 82 mm, then the strips (18) are degreased and the surface of the aluminum facing sheet materials is degreased in a chemical degreasing unit, and then the surface of the aluminum facing sheet materials in contact with the cellular filler is cleaned.

[0089] After the preparatory operations, the structure (11) of the cellular filler is formed (Fig. 7); for this purpose, a strip of forming equipment is introduced in the form of a plurality of adjacent beams (23, 24) containing a plurality of pairs of guide pins (20), wherein one of the beams is movable (23), and each even beam is fixed (24), along the edges of which guide pins (20) are installed.

[0090] The formation of the structure (11) of the cellular filler is carried out by laying strips (18) of aluminum foil, unwound from a reel (14), across the beams (23, 24) 2500 mm long between the guide pins (20), after which the movable beams (23) are moved along the fixed beams (24) and then fixed, ensuring the formation of a wavy strip (10) of aluminum foil. The forming equipment is installed with a gap between them so that a gap of 0.6 mm wide is formed between adjacent wavy strips (10) of aluminum foil, forming a through space that is filled with glue.

[0091] Then, a forming tool with corrugated strips (10) of aluminum foil is installed on the surface of the first facing sheet material, on the surface of which, for example, epoxy glue has been previously applied, which fills the indicated through space, and the ends of the corrugated strip (10) of aluminum foil are glued to the first facing sheet material until the epoxy glue is completely polymerized in the cold curing mode with a 24-hour exposure at room temperature under load (due to the weight of the forming tool), ensuring a tight fit of the ends of the filler to the first facing sheet material.

[0092] Next, the movable beams (23) of the forming equipment are unfastened and the forming equipment is removed from the cellular filler glued to the first facing sheet material. Then, the cellular filler made of corrugated strips (10) of aluminum foil with the first facing sheet material is installed on the surface of the second facing sheet material, on the surface of which epoxy adhesive has been previously applied, and the ends of the corrugated strip (10) of aluminum foil are glued to the second facing sheet material until the epoxy adhesive is completely polymerized in the cold curing mode with a 24-hour hold at room temperature under load (additionally installed on the second of the first facing sheet material), ensuring a tight fit of the ends of the filler to the second facing. The result is a final product - a panel containing a structure (11) of cellular filler made of corrugated strips (10) of aluminum foil.

[0093] All the above options allow for the production of a glued panel with a cellular core with overall dimensions specified in a wide range of values, due to the formation of a cellular core from the required length and quantity of a corrugated strip of aluminum foil; high cell quality, characterized by a wave amplitude spread of no more than 0.3 mm and its period of no more than 0.2 mm due to the fact that the filler is formed in a tooling that ensures this accuracy of the cell shape parameters; compressive strength for a panel without through channels is 10% higher than for a panel with a 6-sided core of similar bulk density and for a panel with through channels it is 30% lower than for a panel with a 6-sided core of similar bulk density; while ensuring, if necessary, free movement of air or other media inside the panel due to the presence of through channels between the filler cells.It also ensures a reduction in the number of technological operations, labor intensity (by 2 times) and energy intensity (by more than 10 times) of panel production while achieving virtually ideal cell geometry quality due to the complete elimination of operations associated with gluing the filler itself from the technological process, since the gluing of the filler occurs spontaneously due to the penetration of glue from the facings into the space between the corrugated strips forming the filler under the action of natural surface tension forces.

[0094] The invention has been disclosed above with reference to a specific embodiment. Other embodiments of the invention may be apparent to those skilled in the art without altering its essence as disclosed herein. Accordingly, the invention should be considered limited in scope only by the following claims.

Claims

CLAUSES OF THE INVENTION 1. A panel comprising a first and a second facing sheet material, between which a cellular filler made of at least two adjacent surfaces of corrugated strips of aluminum foil is secured using a layer of adhesive applied to the surfaces of the first and second facing material.

2. A panel according to claim 1, characterized in that the cellular filler is formed from a corrugated strip with a half-period equal to the length of the cell, arranged relative to each other in such a way that they form a structure consisting of closed or open cells.

3. The panel according to item 1, characterized in that the polymerized layer of adhesive in the contact zone of the foil with the facing sheet material is made in the form of a high fillet, and in the center of the cell is made in the form of a thin film.

4. The panel according to claim 1, characterized in that the wavy strips forming the cellular filler are oriented along the short or long side of the panel.

5. The panel according to claim 1, characterized in that it has high quality filler geometry, wherein the centers of adjacent filler cells are located on the same line, and the diameter of the cells is the same.

6. The panel according to item 1, characterized in that a through space is formed between the contacting surfaces of adjacent corrugated strips of aluminum foil.

7. A method for producing a panel according to any of paragraphs 1-6, comprising the following steps: - forming a cellular filler structure from a pre-treated aluminum foil strip in a forming tool that forms at least one row of cells composed of two adjacent strips of corrugated tape; - applying a layer of glue to the surface of the first facing sheet material, previously prepared for gluing; - installation of a forming tool with a cellular filler on the surface of the first facing sheet material with a layer of glue; - gluing the ends of the corrugated strips of cellular filler made of aluminum foil to the first facing sheet material until the adhesive is completely polymerized in the cold or hot curing mode under a load that ensures tight adhesion of the ends of the filler to the surface of the first facing sheet material; - removal of the forming equipment from the cellular filler glued to the first facing sheet material; - applying a layer of glue to the surface of the second facing sheet material, previously prepared for gluing; - installation of a cellular filler with a first facing on the surface of a second facing sheet material with a layer of adhesive, so that the ends of the filler touch the surface of the second facing sheet material with a layer of adhesive; - gluing the second facing sheet material to the ends of the corrugated strips of aluminum foil of the cellular filler until the adhesive has completely polymerized in the cold or hot curing mode under a load that ensures a tight fit of the ends of the filler to the second facing sheet material.

8. A method for producing a panel according to paragraph 7, characterized in that a cellular filler structure is formed from corrugated strips of aluminum foil, arranged relative to each other in such a way that they form a structure consisting of closed or open cells.

9. A method for producing a panel according to paragraph 8, characterized in that in order to form a cellular filler structure from at least two wavy strips of aluminum foil, with a width equal to the height of the cellular filler, the strips of aluminum foil, unwound from a reel, are fixed in a forming tool in the form of a U-shaped profile containing at least two vertical walls, with a thickness of the vertical wall of the profile less than 0.3 mm, with a vertical wall height of 30-70% of the filler height, an internal width equal to half the height of the cell being formed minus the foil thickness, and a base with a deviation from flatness along the length no worse than the thickness of the adhesive layer, and a rigging of at least two adjacent U-shaped profiles with a corrugated tape laid in them is installed on the surface of the first facing sheet material with an adhesive layer applied to it, ensuring tight adhesion of the ends of the said tape to the first facing sheet material and subsequent gluing of the said ends after complete polymerization of the adhesive, wherein the adjacent U-shaped profiles forming the shaping rigging are installed on the surface of the first facing sheet material with an adhesive layer applied to it, with a gap between them so that a gap of at least 0 in width is formed between the adjacent contacting surfaces of the corrugated tapes of aluminum foil.6 mm, forming a through space, or supporting adjacent U-shaped profiles, forming a shaping tool, are installed on the surface of the first facing sheet material with a layer of adhesive applied to it, close to each other, so that between the adjacent contacting surfaces of the corrugated tapes of aluminum foil a gap is formed equal to the thickness of two walls of the shaping profile, which is completely or partially filled with adhesive, with which the filler is glued to the facing sheet material.

10. The method for producing a panel according to claim 9, characterized in that the formation of the structure of the cellular filler from corrugated strips of aluminum foil using a U-shaped profile containing a group of cylindrical pins, wherein adjacent pins are lowered on different sides of the vertical axis, is carried out by installing along the axis of the U-shaped profile a strip of aluminum foil unwound from a reel, with subsequent sequential alternate lowering of pins on different sides of the strip, providing tension and the formation of a corrugated strip when the pins are fixed in the lowered position, wherein in order to form the next section of the corrugated strip of aluminum foil, after fixing the last pin in the group of pins and fixing the free cut end of said strip, the previous pins are raised and moved into the adjacent U-shaped profile to form a corrugated strip, after which the above-described operations for forming the next adjacent section of the corrugated strip of aluminum foil are repeated.

11. The method for obtaining a panel according to paragraph.9, characterized in that the formation of the structure of the cellular filler from the corrugated tapes of aluminum foil with the help of a U-shaped profile containing a group of a pair of rollers rotating in different directions, located above the wall of the profile and moving along the U-shaped profile, is carried out by fixing the free end of the tape of aluminum foil unwound from a reel at one end of the U-shaped profile, with subsequent pulling of the said tape between a pair of the said rotating rollers moving along the U-shaped profile as the corrugated profile of the tape is formed, in the direction opposite to the direction in which the wave is formed, with subsequent fixing of the other cut free end of the said tape at the other end of the profile, wherein to form the next adjacent section of the corrugated tape of aluminum foil, the free end of the tape of aluminum foil unwound from a reel is moved into the adjacent U-shaped profile and the above-described operations are repeated.

12. The method for producing a panel according to claim 8, characterized in that the formation of a cellular filler structure from at least two corrugated strips of aluminum foil, with a width equal to the height of the filler, in which the strips of aluminum foil are fixed in a forming tooling in the form of at least two adjacent beams, with rows of guide pins of circular or rectangular cross-section, spaced from each other at a distance equal to half a wave period, with a pin height of 30-70% of the filler height, and the tooling in the form of at least two adjacent beams with a corrugated strip laid in them is installed on the surface of the first facing sheet material with a layer of glue applied to it, ensuring a tight fit of the ends of the said strip to the first facing sheet material, and subsequent gluing of said ends after complete polymerization of the adhesive, wherein the adjacent beams are still installed with a gap between them so that a gap of at least 0.6 mm in width is formed between the adjacent contacting surfaces of the corrugated strips of aluminum foil, forming a through space, or the adjacent form-forming beams are installed close to each other so that a gap of less than 0.6 mm is formed between the adjacent contacting surfaces of the corrugated strips of aluminum foil, wherein the formed gap is filled completely or partially with adhesive, with which the filler is glued to the facing sheet materials.

13. The method for producing a panel according to claim 8, characterized in that the formation of a cellular filler structure from at least two corrugated aluminum foil strips, with a width equal to the height of the filler, in which the corrugated aluminum foil strips are fixed in a forming tooling in the form of at least two adjacent beams, with rows of a pair of guide pins of a circular or rectangular cross-section, mounted on rotating platforms, with a pin height of 30-70% of the filler height, is carried out by fixing at one end of a beam with a width of at least half the height of a cell, with a length of at least the length of the panel, the free end of an aluminum foil strip unwound from a reel and passing between pairs of guide pins mounted on rotating platforms that are mounted on the said beam, after which the platforms with pairs of guide pins are successively rotated around the axes at an angle that ensures the formation of a wavy surface of the strip,with subsequent fixation of each pair of guide pins in a rotated position, wherein, in order to form the next adjacent section of the corrugated tape of aluminum foil, the above-described operations are repeated, after which the corrugated tape is transferred from the forming equipment to the supporting equipment in the form of a beam with fixed pins or in the form of a U-profile to maintain the shape of the tape when gluing the ends of the tape to the first facing sheet material, then the guide pins on the rotating platforms are returned to their original position, after which the supporting equipment with the corrugated tape laid in it is installed on the surface of the first facing sheet material with a layer of glue applied to it, ensuring a tight fit of the ends of the said tape to the first facing sheet material by the weight of the equipment maintaining the shape of the tape and subsequent gluing of the said ends after complete polymerization of the glue, wherein the forming adjacent beams are installed with a gap between them so thatthat between the adjacent contacting surfaces of the corrugated strips of aluminum foil a gap of at least 0.6 mm in width is formed, forming a through space, or the forming adjacent beams are installed close to each other, so that, a gap of less than 0.6 mm is formed between the adjacent contact surfaces of the corrugated strips of aluminum foil, and the resulting gap is filled completely or partially with glue, with which the filler is glued to the facing sheet materials.

14. The method for producing a panel according to claim 12, characterized in that the formation of the structure of the cellular filler with the help of forming equipment in the form of at least two beams with fixed guide pins is carried out by fixing the free end of the tape of aluminum foil unwound from a reel at one end of the beam, with subsequent pulling of the said end of the tape between the guide pins, due to the execution of pendulum movements by the gripper when moving along the beam with guide pins, through the frame of which the said tape is passed, ensuring the formation of a wavy profile of the tape of aluminum foil, and fixing the free cut end of the said tape, wherein to form the next adjacent section of the wavy tape of aluminum foil, the free end of the tape of aluminum foil unwound from the reel (14) is moved into the adjacent beam and the above-described operations are repeated.

15. The method for producing a panel according to claim 12, characterized in that the formation of the structure of the cellular filler using a forming tool in the form of at least two beams equipped with a gear and containing a group of holes with lowered guide pins of a circular or rectangular cross-section, with the guide pins located between them, fixed in a raised position, is carried out by fixing the free end of the tape of aluminum foil, unwound from a reel, at one end of the beam, with subsequent pulling of the said tape between the gear with a raised guide pin, which is raised vertically upward after the tape of aluminum foil is inserted behind the hole with a lowered guide pin, ensuring the formation of a wavy tape of aluminum foil, and after the last guide pin in the row is extended, the free cut end of the said wavy tape is fixed,in this case, to form the next adjacent section of corrugated aluminum foil tape, the above-described operations are repeated.

16. The method for producing a panel according to claim 12, characterized in that the formation of the structure of the cellular filler is carried out by means of a forming tool in the form of a plurality of adjacent beams containing a plurality of pairs of guide pins, wherein one of the beams is movable, and each even beam is fixed, along the edges of which guide pins are installed, and the formation of the structure of the cellular filler is carried out by laying strips of aluminum foil, unwound from a reel, across the beams between the guide pins, with subsequent movement of the movable beams along the fixed beams, ensuring the formation of a corrugated strip of aluminum foil.

17. The method for producing a panel according to claim 8, characterized in that the formation of a cellular filler structure from at least two corrugated strips of aluminum foil, with a width equal to the height of the filler, in which the corrugated strips of aluminum foil are fixed in a forming tool in the form of at least two adjacent beams containing fixed guide pins of a circular or rectangular cross-section with a length of at least 25% of the width of the strip and no more than the width of the strip minus the thickness of the adhesive layer on the facing sheet material, located along one line at a distance relative to each other equal to the period of the formed wave, and movable hammer pins, wherein the formation of the cellular filler structure is carried out by fixing at one end of a beam with a width of at least half the height of the cell, with a length not less than the length of the panel, the free end of the strip of aluminum foil, unwound from a reel, and located in a taut state above the said fixed guide pins,and subsequent sequential lowering onto the aluminum foil tape in the plane in the middle between the fixed guide pins of the movable hammer pins to a lowering depth equal to half the diameter of the filler cell, ensuring the formation of a wavy tape of aluminum foil, wherein after the formation of the wavy tape of aluminum foil, the wavy tape is transferred from the forming equipment to the supporting equipment in the form of a beam with fixed pins to maintain the shape of the tape when gluing the ends of the tape to the surface of the first facing sheet material, while to form the next adjacent section of the wavy tape of aluminum foil, the above-described operations are repeated, and the supporting equipment in the form of at least two adjacent beams with the wavy tape laid in them is installed on the surface of the first facing sheet material with a layer of glue applied to it,ensuring a tight fit of the ends of the said tape to the first facing sheet material by the weight of the beams supporting the shape of the corrugated tape, and subsequent gluing of the said ends after the complete polymerization of the adhesive, wherein the adjacent shaping beams are installed with a gap between them so that between the adjacent contacting surfaces of the corrugated tapes of aluminum foil a gap of at least 0.6 mm in width is formed, forming a through space, or the adjacent shaping beams are installed close to each other so that between the adjacent contacting surfaces of the corrugated tapes of aluminum foil a gap of less than 0.6 mm is formed, wherein the formed gap is filled completely or partially with adhesive, with which the filler is glued to the facing sheet materials.

18. The method for producing a panel according to claim 12, characterized in that the formation of the structure of the cellular filler is carried out by means of a forming tool in the form of at least two beams, with rows of a pair of guide pins of a circular or rectangular cross-section, mounted on rotating platforms, wherein the formation of the structure of the cellular filler is carried out by fixing at one end of a beam with a width of at least half the height of a cell, a length of at least the length of the panel, the free end of a tape of aluminum foil unwound from a reel, and passing between pairs of guide pins mounted on rotating platforms, which are mounted on the said beam, after which the platforms with pairs of guide pins are successively rotated around the axes at an angle that ensures the formation of a wavy surface of the tape, with subsequent fixation of each pair of pins in a rotated position, wherein,to form the next adjacent section of the corrugated strip of aluminum foil, the above-described operations are repeated, wherein the adjacent forming beams are installed with a gap between them so that between the adjacent contacting surfaces of the corrugated strips of aluminum foil a gap of at least 0.6 mm in width is formed, forming a through space, or the adjacent forming beams are installed close to each other so that between the adjacent contacting surfaces of the corrugated strips of aluminum foil a gap of less than 0.6 mm is formed, wherein the formed gap is filled completely or partially with glue, with which the filler is glued to the facing sheet materials.

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