CN115217259A

CN115217259A - Edge-folded composite large plate, processing method and suspended ceiling comprising edge-folded composite large plate

Info

Publication number: CN115217259A
Application number: CN202210909825.XA
Authority: CN
Inventors: 邱锦昱; 张尧弟
Original assignee: Shanghai Longsheng Industry Co ltd
Current assignee: Shanghai Longsheng Industry Co ltd
Priority date: 2022-07-29
Filing date: 2022-07-29
Publication date: 2022-10-21

Abstract

The invention discloses a large flanged composite plate, a processing method and a suspended ceiling comprising the same. The big compound board of hem includes panel, backplate and sandwich layer, the panel includes: the panel outer ring part is arranged on the outer edge of the panel main body part and is connected with the panel main body part into a whole; the outer ring part of the panel is bent towards the direction of the back plate to form a bent plate; the matching position of the bent plate and the corner of the back plate is not higher than the back plate; the corners of the main body part of the panel are flat and have no gaps. According to the method provided by the invention, through the cross design of the bending line parts and the combination of the step-by-step bending forming process of only bending a small angle each time, the bending lines on two adjacent sides have certain interference amount during bending forming, and a micro deep drawing effect is formed at the corner part by utilizing the better ductility of the aluminum material during bending, so that the corner part of the bent rear panel has no notch, the flatness and the attractiveness of the large panel are improved, the obtained large panel does not need to be assembled when being installed, the operation is convenient, and the method is suitable for quick installation.

Description

Edge-folded composite large plate, processing method and suspended ceiling comprising edge-folded composite large plate

Technical Field

The invention relates to the technical field of decorative suspended ceilings, in particular to a large edge-folded composite plate without an enclosure frame during installation and a processing method thereof.

Background

The decorative suspended ceiling is an essential component in modern decoration, and particularly in kitchens and toilets, a plurality of suspended ceiling electrical appliances and a plurality of installation scenes of pipe arrangement and wiring exist.

At present, use more in the decoration furred ceiling field to have: integral gypsum board suspended ceiling, mineral wool board suspended ceiling, strip buckle suspended ceiling (wood, PVC, aluminum), aluminous gusset plate suspended ceiling and the like. Among them, the suspended ceiling with the aluminous gusset plate has wide application. The traditional single-layer aluminous gusset product is shown in figure 1, the size of the traditional single-layer aluminous gusset product is more than 300 as a modulus, the maximum size can be generally 600 x 1200, but the larger the size is, the thicker the required plate is, and the more difficult the flatness is to ensure.

With the higher and higher requirements of consumers on suspended ceilings, users generally want the suspended ceiling to have stronger integral sense and do not want excessive segmentation. Therefore, the aluminum-based composite large plate starts to be transported in the suspended ceiling. The aluminum-based composite large plate is represented by an aluminum honeycomb composite plate, and has the advantages of high specific strength, good flatness, heat preservation, sound insulation and the like, so that the installation and use effects of the aluminum-based composite large plate are rapidly accepted by broad users.

As shown in fig. 2, the aluminum honeycomb composite plate generally comprises a face plate 101, a back plate 102 and a honeycomb core 103, wherein the honeycomb core 103 is disposed between the face plate 101 and the back plate 102, one side of the honeycomb core 103 is connected to the face plate 101 through a first adhesive layer 104, and the other side of the honeycomb core 103 is connected to the back plate 102 through a second adhesive layer 105. The face plate 101, the back plate 102 and the honeycomb core 103 are all made of aluminum.

The problem of the aesthetic measure and the wholeness of a user side is solved by the aluminum-based composite large plate, but an effective solution is always lacked for the installation problem of the aluminum-based composite large plate. In the course of evolution development, the following two schemes are adopted in practice:

(1) Scheme for aluminum-based composite large plate enclosure frame

The scheme of the aluminum-based composite large plate surrounding frame is a method for surrounding the aluminum-based composite large plate on four sides by using aluminum profiles as the name suggests. With reference to fig. 3 and 4, the specific operation flow of the method is: according to the size of the aluminum-based composite large plate 201, two ends of four aluminum profiles 202 with specific sections are cut at 45 degrees, then four corresponding edges of the aluminum-based composite large plate 201 are respectively enclosed, the four corners are fastened by using corner connectors and screws, the aluminum profiles 202 and the aluminum-based composite large plate 201 are locked by screws 203 at certain intervals along the four edges, so that the effect of (length and width dimension) 'an enlarged single-layer aluminum gusset plate' is obtained, and then the suspended ceiling is installed by using the installation mode of the single-layer aluminum gusset plate.

The scheme has the advantages that the installation habit of the original single-layer aluminum gusset plate can be used to the greatest extent, and the installation auxiliary material of the single-layer aluminum gusset plate is basically universal. But its disadvantages are also evident:

A. the four sides need to be surrounded by a frame, the surrounding frame needs to be cut by preprocessing holes, and 45-degree cutting angles are formed on the spot, so that the requirement on the machining precision is high;

B. a large number of screws are required to be locked in the enclosing frame and the corner connectors (the number of the screws required by the plate with the size of 1200 x 2400 is about 40 according to the screw spacing 300), and the installation efficiency is low;

C. the condition that the surrounding frame material is exposed still exists after the installation, and the whole attractiveness of the suspended ceiling is influenced.

(2) Scheme for pre-flanged aluminum-based composite large plate

In order to overcome the defect that the aluminum-based composite large plate enclosure frame scheme is low in installation efficiency, a pre-flanging aluminum-based composite large plate scheme simulating a single-layer aluminum gusset plate process is provided afterwards. The method comprises the following specific operation flows: the manufacturing method comprises the steps of firstly molding the panel by simulating a single-layer aluminum buckle plate process (pre-flanging the periphery), then coating adhesive on the back surface of the panel, coating adhesive on the back plate cut according to the specified size, and finally bonding the adhesive coating surfaces of the panel and the back plate with the two sides of the honeycomb core cut according to the specified size.

The method has the advantages that the step of enclosing the frame is omitted, and the processed aluminum-based composite large plate can be directly used as a single-layer aluminum gusset plate of an enlarged version. But the production of the honeycomb core needs the independent molding of the panel and then the glue distribution, the back plate is cut according to the needs and then the honeycomb core needs to be trimmed after being stretched by a single piece, and generally, the process is complex, the molding efficiency is low, and the continuous production cannot be realized. Therefore, fundamentally, the scheme of pre-flanging the aluminum-based composite large plate only moves low efficiency from the installation link to the production link, and still limits large-area popularization.

Disclosure of Invention

The embodiment of the application provides the flanged composite large plate and the processing method thereof, the technical problem that the production or installation efficiency of the composite large plate is low in the prior art is solved, the rear flanged micro-drawing process is adopted, the continuous production can be supported, the production and installation efficiency is high, no material is exposed and no hole is formed after installation and splicing, and the suspended ceiling is flat and attractive integrally.

The embodiment of the application provides a compound big board of hem, including panel, backplate and locate the sandwich layer between panel and the backplate, its characterized in that, the panel includes

A panel main body portion disposed opposite to the back plate, an

The panel outer ring part is arranged on the outer edge of the panel main body part and is connected with the panel main body part into a whole;

the outer ring part of the panel is bent towards the direction of the back plate to form a bent plate; the matching part of the bent plate and the corner of the back plate is not higher than the back plate;

the corners of the panel main body part are flat and have no gaps.

Preferably, the corners of the back plate, the core layer and the bending plate are rounded; the corner of the bending plate is attached to the corner of the core layer and does not protrude out of the fillet of the core layer.

Preferably, the main body part of the bent plate of at least one group of opposite sides of the folded composite large plate is higher than the back plate;

the part of the bent plates of at least one group of opposite sides, which is higher than the back plate, is provided with an anti-falling structure for positioning and clamping;

preferably, the angle between the bending plate and the main body of the panel is set to be generally 90 °, and may also be 45 °, 60 °, and the like, and the bending plate may be designed according to specific requirements.

Preferably, the distance between the bending plate and the cross section of the core layer is less than 1.5mm.

The embodiment of the application also provides a processing method of the folded edge composite large plate, which comprises the following steps:

step S1: preparing a composite large plate;

the composite large plate comprises a panel, a back plate and a core layer, wherein the core layer is arranged between the panel and the back plate, one side of the core layer is connected with the panel through a first bonding layer, and the other side of the core layer is connected with the back plate through a second bonding layer;

step S2: preprocessing the edges of the composite large plate;

removing the back plate, the first bonding layer and the core layer at the edge of the outer ring of the composite large plate, and reserving the panel for folding; defining the panel reserved at the edge of the outer ring of the composite large plate and used for folding edges as a bending plate;

removing materials which can interfere with the corner of the bent plate during edge folding;

the reserved bending line parts of the bending plates at the two adjacent sides are crossed, so that the micro deep drawing effect is achieved during bending, and the corners of the panel main body part at the enclosed position of the bending plates at the adjacent sides are complete without gaps after bending;

and step S3: forming an anti-falling structure for positioning and clamping on the bending plate;

and step S4: bending the bending plate to one side of the back plate of the large composite plate, wherein the bending process is divided into a plurality of steps to be completed, and the bending angle is gradually formed from small to large;

step S5: and (3) bending and forming the panels at the edges of the large composite board to obtain the large flanged composite board, wherein the corners of the main body part of the panel of the large flanged composite board are flat and have no gap due to the micro deep drawing effect in the step-by-step forming process.

Preferably, in the step S1, the composite large plate is produced by a continuous forming process.

Preferably, in the step S2, during preprocessing,

enabling the width of the corner position of the bending plate to be not more than the sum of the thicknesses of the core layer and the back plate, and enabling the corner position to be not higher than the back plate after the bending plate is bent;

the width of the main body part of the bent plate of at least one group of opposite sides of the composite large plate is larger than the sum of the thicknesses of the core layer and the back plate, so that the main body part of the bent plate of at least one group of opposite sides is higher than the back plate after the bent plate is bent;

processing round corners at the corners of the back plate and the core layer, and processing round corners at the positions of the bending plate where the interference materials are removed;

the distance between the bending line and the cross section of the core layer is less than 1.5mm.

Preferably, in the step S3, the anti-falling structure is disposed on a portion of the bent plate, which is higher than the back plate after being bent.

The embodiment of the application further provides a suspended ceiling, which comprises the triangular keel and the large flanging composite plate, wherein the two adjacent large flanging composite plates are attached to the bending plate and inserted into the triangular keel, and the anti-disengaging structure on the bending plate is clamped in the triangular keel.

One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

1. the application provides a compound big board processing method of hem, through brand-new process design, can support continuous production, improved production efficiency.

2. The application provides a compound big board processing method of hem, through the line part cross design of bending, combine the substep bending forming technology of only bending a less angle at every turn, the line of bending of the adjacent both sides of mutually perpendicular has certain interference volume when making the shaping of bending, like this when bending, utilizes the better ductility of aluminum product to form the effect of a little deep-drawing in bight, makes the back panel corner that bends not have the breach, has improved the roughness and the aesthetic property of big board.

3. The application provides a compound big board of hem, simple to operate need not to piece together the frame, is fit for quick installation, has improved the installation effectiveness.

4. The utility model provides a compound big board of hem can be used to decorate the furred ceiling, still can use in fields such as wall, and the range of application is extensive.

Drawings

FIG. 1 is a schematic view of a single layer aluminous gusset product;

FIG. 2 is a schematic view of an aluminum honeycomb composite panel product structure;

FIG. 3 is a schematic structural view of a single aluminum-based composite large plate after enclosing a frame;

FIG. 4 is an enlarged view of a portion of FIG. 3;

FIG. 5 is a flow chart of a method for processing a flanged composite large panel provided in an embodiment of the present application;

FIG. 6 is a layout diagram of an apparatus for continuously forming an aluminum-based composite large panel according to an embodiment of the present application;

FIG. 7 is a flow chart of a continuous forming process of an aluminum-based composite large plate in the embodiment of the present application;

FIG. 8 is a schematic view of the aluminum-based composite large plate after being preprocessed in the embodiment of the present application;

FIG. 9 is a partial enlarged axial view of an aluminum matrix composite panel after corner pretreatment in an embodiment of the present application;

FIG. 10 is an enlarged partial top view of an aluminum-based composite panel after corner pretreatment in an embodiment of the present application;

FIG. 11 is a schematic view of the overall structure of the flanged composite large plate after being formed in the embodiment of the present application;

FIG. 12 is a schematic view of a part of the formed flanged composite large plate according to the embodiment of the present application;

FIG. 13 is an enlarged view of a portion of the flanged composite panel after forming in the embodiment of the present application;

FIG. 14 is an enlarged view of a corner after bending by a conventional bending process;

FIG. 15 is a schematic comparison of corner notches after splicing of a large flanged composite panel prepared by a conventional method and a method of the present application; (a) conventional methods, (b) the methods of the present application;

FIG. 16 is a schematic view of a hemmed composite large panel made according to an embodiment of the present application applied to a suspended ceiling;

FIG. 17 is a schematic view of the raised edge of the large flanged composite plate being locked in the triangular keel.

Detailed Description

The embodiment of the application solves the technical problem that the production or installation efficiency of the large composite plate is low in the prior art by providing the large flanged composite plate and the processing method thereof.

In order to solve the technical problems, the general idea of the embodiment of the application is as follows:

the method adopts a rear edge folding process, namely rear edge folding, which is relative to the scheme of the pre-edge folding aluminum-based composite large plate, wherein the scheme of pre-edge folding is that a panel is firstly folded and then is compounded with a honeycomb core and a back plate; and the flanging process is a post-processing and flanging process on the basis of the finished composite aluminum-based composite large plate.

Therefore, in the installation link, the same installation habit of the single-layer aluminum gusset plate can be used; in the production link, the formed aluminum-based composite large plate is directly used for processing, so that continuous production can be supported, and the production and installation efficiency is improved.

In order to better understand the technical scheme, the technical scheme is described in detail in the following with reference to the attached drawings of the specification and specific embodiments.

Fig. 5 is a flowchart of a method for processing a flanged large composite board provided in an embodiment of the present application, where the method for processing a flanged large composite board includes the following steps:

step S1: preparing an aluminum-based composite large plate, which is generally rectangular;

the aluminum-based composite large plate is produced by a continuous forming process, fig. 6 is a layout diagram of continuous forming equipment of the aluminum-based composite large plate, and fig. 7 is a flow chart of the continuous forming process of the aluminum-based composite large plate. The panel, the back plate, the honeycomb core, the first bonding layer and the second bonding layer are respectively wound on corresponding reels, the panel and the back plate are made of aluminum materials, and the first bonding layer and the second bonding layer are made of high-molecular hot-melt adhesive films (cast films). The surface aluminum roll 301, the back aluminum roll 302, the honeycomb core roll 303, the first casting film roll 304 and the second casting film roll 305 rotate to discharge materials at set speeds respectively, so that the surface aluminum and the first casting film are pre-compounded, the back aluminum and the second casting film are pre-compounded, and the honeycomb core is stretched; and then thermally compounding the surface aluminum, the honeycomb core and the back aluminum, melting the casting film to connect the surface aluminum, the honeycomb core and the back aluminum into a whole, coating a protective film on the surface of the surface aluminum after shaping and cooling, and finally receiving the material after longitudinal cutting, traction and transverse cutting. In fig. 6, a to H represent: the device comprises a pre-compounding section, a cooling section, a film coating section, a longitudinal cutting section, a traction section, a transverse cutting section and a material receiving section.

Step S2: preprocessing the aluminum-based composite large plate, and specifically operating as follows:

through a machining method, the back plate, the first bonding layer and the honeycomb core at the edge of the outer ring of the aluminum-based composite large plate are all removed, the panel is reserved for folding, and the panel reserved at the edge is defined as a bent plate 501 below, as shown in fig. 8. The casting film adhered to the bent plate 501 may remain. Here, the protective film attached to the surface of the panel should be retained to protect the surface of the panel.

Referring to fig. 8, in the same clamping process as the above-mentioned machining, the tool is adjusted to remove a part of the material that may interfere with the folding and mounting at the four corners of the folded plate 501, as shown at P in fig. 8.

In a preferred embodiment, the back plate and the honeycomb core are processed into round corners at four corners of the aluminum-based composite large plate; and also rounded where interference material is removed from bend plate 501 as shown at α in fig. 9. These fillets can prevent to scrape the hand under the prerequisite that does not influence aluminium base composite large plate intensity and decorative cover effect, and staff's injured risk in the time of can effectively reducing the installation.

In a preferred embodiment, during the preprocessing, the bending lines of the remaining two adjacent side bending plates 501 are crossed as shown in M in fig. 10, so as to achieve the effect of micro-drawing during bending, and to make the corners of the panel main body at the enclosed positions of the adjacent sides complete without any gap after bending.

The bending line is a line used for marking the bending position on the panel. In theoretical mechanical calculation, the bending line is an axis of a central plane between the bending starting line and the bending ending line (the material does not deform on the plane). The neutral plane of the common isotropic material can be approximately arranged in the middle of the thickness direction, and in the actual working condition, the position of the bending line generally needs to be corrected under the influence of various factors.

In the embodiment, under the condition that the surface of the panel also has a layer of protective adhesive film for the aluminum-based composite large plate with the plate thickness of 0.3-0.6 cm, the distance between the bending line and the section of the honeycomb core is less than 1.5mm.

In a preferred embodiment, when the interference material is removed from the four corners of the bent plate 501, the remaining width direction edges 401 and 402 of the adjacent two-side bent plates are at acute angles to the respective bending lines, and the edges of the adjacent two-side bent plates are rounded. After the round angle is preprocessed to avoid the honeycomb core, the edge of the bending plate is exposed to a sharp corner (easily causing damage to installation personnel).

In a preferred embodiment, when the interference material is removed from the four corners of the bent plate 501, the width of the corner position of the bent plate is slightly less than the thickness of the aluminum matrix composite slab, so that after the bent plate 501 is bent, the longitudinal edge 403 of the bent plate is not higher than the back plate, so as to avoid interference with the keel during installation.

The length of the bent plate with the edge not higher than the back plate is usually 15-50 mm.

And step S3: an anti-falling structure is processed on a panel (a bending plate 501) at the edge of the pretreated aluminum-based composite large plate, and the anti-falling structure is used for playing an anti-falling role after the panel and the triangular keel are installed.

In a preferred embodiment, the anti-slip structure is a protrusion, and is formed by directly pressing on the panel.

In an optional embodiment, the anti-dropping protrusions are formed on the face plates at the four edges of the aluminum-based composite large plate.

In most cases, the folded edge composite large plate has the requirement that the width of the folded edge of a group of edges does not exceed the thickness of the composite large plate (especially the short edge of the composite large plate with a large ratio of length to width).

And step S4: bending the panel (bending plate) at the edge of the pretreated aluminum-based composite large plate to one side of the back plate, wherein the bending process can be decomposed into a plurality of steps to be completed as shown in fig. 5, the bending process is performed at each time by a small angle, the bending angle is gradually formed, the required bending angle is finally obtained through shaping, the most common bending angle is 90 degrees, and the edge panel after bending is perpendicular to the main body panel by 90 degrees.

In a preferred embodiment, the angle of bending does not exceed 15 ° per step.

Step S5: and bending and forming the panels at the peripheral edges of the aluminum-based composite large plate to obtain a finished flanged aluminum-based composite large plate, as shown in fig. 11.

With reference to fig. 12, the flanged aluminum-based composite large panel includes a front panel 101, a back panel 102 and a honeycomb core 103, the honeycomb core 103 is disposed between the front panel 101 and the back panel 102, one side of the honeycomb core 103 is connected to the front panel 101 through a first adhesive layer, and the other side of the honeycomb core 103 is connected to the back panel 102 through a second adhesive layer. The face plate 101, the back plate 102 and the honeycomb core 103 are made of aluminum. The first adhesive layer and the second adhesive layer are made of high-molecular hot-melt adhesive films.

The periphery of the panel 101 is bent toward the back plate to form a bent plate 501. The bending plate 501 should be close to the cross section of the honeycomb core as much as possible, that is, the distance d between the bending plate 501 and the cross section of the honeycomb core 103 should be as small as possible, and is preferably attached. In a preferred embodiment, d < 1.5mm.

The bending plate 501 is provided with a plurality of protrusions 502 which are used for preventing the triangular keel from falling off after being installed.

In an alternative embodiment, the bending plate 501 is perpendicular or nearly perpendicular to the main body of the panel 101.

In a preferred embodiment, projections 502 are provided at equal intervals on bending plate 501.

In a preferred embodiment, the flanged composite large plate is of a rectangular structure; in another preferred embodiment, the flanged composite panel is in other shapes including, but not limited to, triangular, pentagonal, hexagonal, etc.

In an optional embodiment, the edge-folding composite large plate is only partially bent to form the anti-separation convex structure, and the rest bent plates are not required to form the anti-separation convex structure (especially, the short side of the composite large plate with a large ratio of length to width is not required to form the anti-separation convex structure).

Referring to fig. 13, the corner of the bending plate of the large flanged composite plate is attached to the honeycomb core and does not protrude out of the prefabricated fillet of the honeycomb core. The upper edge 403 of the bent plate at the corner position is slightly lower than the back plate of the aluminum-based composite large plate.

The

edges

401 and 402 of two adjacent bending plates at the corner form a V-shaped structure, and the bottom of the V-shaped structure is arc-shaped. The panel main body corner of the folded composite large panel is complete and has no notch, as shown in T part in figure 13.

In the prior art, two bending lines on two adjacent sides of a conventional bending process are not allowed to intersect, so that when two right-angle sides are bent, a rectangular notch with the side length not less than the thickness of the plate and the bending radius is formed in the corner of the bent right-angle side, as shown in a position Q in fig. 14. This gap leaves a hole 600 on the ceiling trim surface 4 times the area of the single gap after the four panels are joined, as shown in fig. 15 (a).

In the embodiment, through the crossed design of the bending line parts and the combination of the step-by-step bending forming process of bending only one small angle at a time, the bending lines on two adjacent sides which are perpendicular to each other have certain interference amount during bending forming, so that during bending, a micro deep drawing effect is formed at the corner part by utilizing the good ductility of the aluminum material, the notch is eliminated, and the corner part of the main body of the bent rear panel is complete. After the four large flanged composite panels 700 manufactured by the method of the embodiment are spliced, the center M is gapless, flat and beautiful, as shown in fig. 15 (b).

The large flanged composite board prepared by the embodiment can be used for suspended ceilings. As shown in fig. 16 and 17, the suspended ceiling includes triangular keels 801, the bent plates 501 of two adjacent large flanged composite boards prepared in this embodiment are inserted into the triangular keels 801 after being attached, and the protrusions 502 on the two bent plates 501 are locked in the triangular keels 801. The triangular keel 801 is connected with a main keel 803 through a hanging piece 802, and the main keel 803 is hung under a ceiling.

After the four large flanged composite plates 700 manufactured by the method of the embodiment are spliced, the center has no notch, and the large flanged composite plates are flat and beautiful.

The large flanged composite board prepared by the embodiment can be applied to decorative suspended ceilings, can also be applied to the fields of wall surfaces and the like, and has a wide application range.

It will be understood that, although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be termed a second element, and, similarly, a second element may be termed a first element, without departing from the scope of example embodiments.

The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.

While the foregoing is directed to the preferred embodiment of the present application, and not to any one of the essential limitations or embodiments thereof, it is noted that various modifications and additions may be made by those skilled in the art without departing from the scope and spirit of the present application, which shall be deemed to be within the full scope of the present application. Those skilled in the art should appreciate that they can readily use the disclosed conception and specific embodiments as a basis for designing or modifying other structures for carrying out the same purposes of the present invention without departing from the spirit and scope of the invention; moreover, any equivalent alterations, modifications and variations of the above-described embodiments according to the spirit and techniques of this application are intended to be within the scope of the claims of this application.

Claims

1. The large folded edge composite plate comprises a panel, a back plate and a core layer arranged between the panel and the back plate, and is characterized in that the panel comprises

A panel main body portion disposed opposite to the back plate, an

the outer ring part of the panel is bent towards the direction of the backboard to form a bent plate; the matching part of the bent plate and the corner of the back plate is not higher than the back plate;

the corners of the panel main body part are flat and have no gaps.

2. A flanged composite large panel according to claim 1, wherein the corners of the back panel, the core and the bend panel are rounded; the corner of the bending plate is attached to the corner of the core layer and does not protrude out of the fillet of the core layer.

3. The flanged composite large panel of claim 1, wherein the main body portion of the bent panel of at least one set of opposite sides of the flanged composite large panel is higher than the back panel;

the part of the bent plates of at least one group of opposite sides, which is higher than the back plate, is provided with an anti-falling structure for positioning and clamping.

4. A flanged composite large panel according to claim 1, wherein the bend plate is at a set angle to the main body portion of the panel.

5. A flanged composite large panel according to claim 1, wherein the distance between the bent panel and the cross-section of the core layer is less than 1.5mm.

6. A processing method of a large flanged composite plate is characterized by comprising the following steps:

step S1: preparing a composite large plate;

step S2: preprocessing the edges of the composite large plate;

the reserved bending line parts of the bending plates on the two adjacent sides are crossed so as to achieve the effect of micro deep drawing during bending, and the corners of the panel main body part at the enclosed position of the bending plates on the two adjacent sides are complete without gaps after bending;

7. A method for processing a flanged large composite board according to claim 5, wherein in the step S1, the composite board is produced by a continuous forming process.

8. A flanged composite large panel processing method according to claim 5, characterized in that in step S2, during preprocessing,

9. A method for processing a folded composite large plate according to claim 8, wherein in the step S3, the anti-slip structure is provided on a portion of the bent plate that is higher than the back plate after being bent.

10. The suspended ceiling is characterized by comprising triangular keels and the large flanged composite boards according to any one of claims 1 to 4, wherein the bent boards of two adjacent large flanged composite boards are attached to and inserted into the triangular keels, and the anti-falling structures on the bent boards are clamped in the triangular keels.