A multi-fold edge sealing machine for metal composite board

Abstract

This invention relates to the field of sheet metal processing technology, specifically to a multi-fold edge banding machine for metal composite sheets. The invention discloses a multi-fold edge banding machine for metal composite sheets, comprising a conveying mechanism for clamping and moving the sheet metal, the sheet metal having a layered upper layer, a core layer, and a lower layer; a pre-milling mechanism for milling one edge of the upper layer and the core layer; a first bending mechanism including a pressing block with a pressing bevel formed on one side; a grooving mechanism including a grooving wheel for pressing a groove into the outer edge of the lower layer; second and third bending mechanisms each including multiple pressing columns; an adhesive dispensing assembly is also provided between the second and third bending mechanisms; and a shaping mechanism including at least one shaping pressure roller for pressing the groove against the adhesive-coated portion of the upper layer. The technical solution of this invention has advantages such as simplified edge banding process, integrated installation structure, and reduced thermal deformation.

Description

Technical Field

[0001] This invention relates to the field of sheet metal processing technology, and more specifically, to a multi-fold edge banding machine for metal composite sheets. Background Technology

[0002] In existing metal sheet edge banding technologies, patch welding is commonly used for edge treatment. This method relies on external metal patches and welding equipment, resulting in a complex and time-consuming edge banding process, and it cannot directly utilize the sheet material itself for edge banding. This process not only increases material costs and energy consumption but also makes the banded area prone to thermal deformation and stress concentration, affecting the overall flatness and durability of the sheet. Furthermore, the finished sheet surface lacks specially designed structural features, making it impossible to form a direct connection with external mounting frames or fixing devices. Therefore, in practical applications, additional clamps, screws, or adhesives must be used for fixation, which not only prolongs the installation cycle but also increases the operational difficulty and potential risk of damage. Summary of the Invention

[0003] The purpose of this application is to provide a metal composite sheet folding edge banding machine, which has the advantages of simplifying the edge banding process, having an installation structure, improving edge sealing, and reducing thermal deformation and stress concentration.

[0004] This application provides a multi-folding edge banding machine for metal composite sheets, the technical solution of which is as follows: Includes: a conveying mechanism, which has a feeding end and a discharging end, for clamping the sheet and driving the sheet to move along the conveying direction. The sheet has an upper plate, a core plate and a lower plate arranged in layers, with the core plate located between the upper plate and the lower plate. The pre-milling mechanism is located on one side of the transmission mechanism and near the feeding end. It is used to mill one edge of the upper plate and the core, and the depth of milling the core is greater than the depth of milling the upper plate. The first bending mechanism is located on the side of the pre-milling mechanism near the unloading end. The first bending mechanism includes at least one pressing block. The pressing block has a pressing slope on the side facing the transmission mechanism. When the plate passes through the first bending mechanism, the edge of the upper plate is squeezed by the pressing slope and bends upward. A grooving mechanism is located on the side of the first bending mechanism near the unloading end. The grooving mechanism includes at least one grooving wheel, which is used to press a groove into the outer edge of the lower plate. The second and third bending mechanisms are sequentially arranged on the side of the pressing mechanism near the unloading end. Both the second and third bending mechanisms include multiple equally spaced pressing columns, and the angle between the pressing columns and the horizontal plane gradually and uniformly increases along the direction from the loading end to the unloading end. A glue dispensing assembly is also provided between the second and third bending mechanisms. The glue dispensing assembly has a glue outlet. The second bending mechanism is used to bend the groove along its inner edge, and the glue outlet applies glue to the surface of the bent part of the upper board. The third bending mechanism is used to bend the lower board upward and make it adhere tightly to the core surface. The shaping mechanism is located on the side of the third bending mechanism near the unloading end. The shaping mechanism includes at least one shaping pressure roller, which is used to press the groove against the part of the upper plate coated with glue.

[0005] Furthermore, this application also proposes that the groove is a V-shaped groove, and after the groove is tightly bonded to the upper plate, a convex ridge is formed on the back of the groove, which is used to be snapped and fixed with the external snap-fit ​​structure.

[0006] Furthermore, this application also proposes that the metal composite sheet multiple folding edge banding machine further includes a first grooving assembly, the first grooving assembly including at least a vertically arranged saw blade, the first grooving assembly being located between the first bending mechanism and the pressing mechanism, for sawing a first bending groove on the surface of the lower sheet, the groove being located outside the first bending groove, and the second bending mechanism bending the groove along the first bending groove.

[0007] Furthermore, this application also proposes that the metal composite sheet multiple folding edge banding machine further includes a second grooving assembly, the second grooving assembly including at least a vertically arranged saw blade, the second grooving assembly being located between the second bending mechanism and the glue dispensing assembly, for sawing a second bending groove on the surface of the connection between the lower layer board and the core board, and the third bending mechanism bending the lower layer board along the second bending groove.

[0008] Furthermore, this application also proposes that the metal composite sheet multiple folding edge banding machine further includes an opening assembly, which is disposed on the side of the forming mechanism near the unloading end. The opening assembly includes at least one grinding block for grinding rectangular notches at the corners of the bent portions of the upper and lower sheets.

[0009] Furthermore, this application also proposes that the metal composite sheet folding edge banding machine further includes a hole-opening assembly, which is located on the side of the grooving assembly near the unloading end. The hole-opening assembly includes at least one drill bit for drilling through holes in the bent portions of the upper and lower sheets.

[0010] Furthermore, this application also proposes that the pre-milling mechanism includes two pre-milling components, each of which includes at least two milling cutters arranged at intervals, and the two pre-milling components respectively mill one side edge of the upper plate and the core plate.

[0011] Furthermore, this application also proposes that the pre-milling assembly further includes a protective shell that encloses the milling cutter portion, and the protective shell has a chip outlet.

[0012] Furthermore, this application also proposes that the transmission mechanism includes a vertically distributed upper transmission belt and a lower transmission belt, with a transmission gap formed between them, and the plate is placed in the transmission gap and clamped and fixed by the upper and lower transmission belts.

[0013] As can be seen from the above, the metal composite sheet multi-folding edge sealing machine provided in this application includes a transmission mechanism, a pre-milling mechanism, a first bending mechanism, a grooving mechanism, a second bending mechanism, a third bending mechanism, a shaping mechanism, and other structures. Through the automatic transmission of the sheet, edge milling, step-by-step bending, and adhesive coating processes, the metal composite sheet material itself is folded and edge-sealed multiple times, avoiding the problems of thermal deformation and insufficient sealing caused by traditional welding processes. It has the advantages of simplifying the edge sealing process, improving edge sealing, and reducing thermal deformation and stress concentration. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of a structure of an embodiment of the metal composite sheet multiple folding edge banding machine of the present invention; Figure 2 This is a schematic diagram of the internal structure of an embodiment of the metal composite sheet multi-folding edge banding machine of the present invention; Figure 3 This is a schematic diagram of the structure of an embodiment of the pre-milling component of the present invention; Figure 4 This is a schematic diagram of a structure of an embodiment of the first bending mechanism of the present invention; Figure 5 This is a schematic diagram of a structure of an embodiment of the first grooving component and the grooving mechanism of the present invention; Figure 6 This is a schematic diagram of an embodiment of the glue dispensing component and the third bending mechanism of the present invention; Figure 7 This is a schematic diagram of the structure of an embodiment of the shaping mechanism, opening assembly, and hole-opening assembly of the present invention; Figure 8 This is a schematic diagram of the structure of the sheet metal of the present invention after being processed by the first bending mechanism, the first grooving assembly, and the grooving mechanism; Figure 9This is a schematic diagram of the structure of the sheet metal of the present invention after being processed by the second bending mechanism and the second grooving assembly; Figure 10 This is a schematic diagram of the structure of the sheet metal of the present invention after being processed by the third bending mechanism; Figure 11 This is a schematic diagram of the structure of the sheet metal after it has been processed by the shaping mechanism according to the present invention.

[0016] Explanation of icon numbers: 1. Conveying mechanism; 11. Loading end; 12. Unloading end; 13. Upper conveyor belt; 14. Lower conveyor belt; 2. Sheet material; 21. Upper layer board; 22. Core board; 23. Lower layer board; 24. Groove; 25. Protruding edge; 26. First bending groove; 27. Second bending groove; 3. Pre-milling mechanism; 31. Milling cutter; 32. Protective shell; 33. Chip outlet; 4. First bending mechanism; 41. Pressing block; 42. Pressing inclined surface; 5. Grooving mechanism; 51. Grooving wheel; 6. Second bending mechanism; 61. Glue dispensing assembly; 62. Glue outlet; 7. Third bending mechanism; 71. Pressing column; 8. Shaping mechanism; 81. Shaping pressure roller; 91. First grooving assembly; 911. Saw blade; 92. Second grooving assembly; 93. Opening assembly; 931. Grinding block; 94. Hole opening assembly; 941. Drill bit.

[0017] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0019] Traditional metal sheet edge banding often uses patch welding, which relies on external materials and lacks a mechanism design for integrated edge banding using the sheet material itself. Furthermore, existing edge-banded sheets typically lack a structure that directly integrates with external mounting structures, requiring additional equipment and tools for installation and fixing, increasing complexity and cost.

[0020] In this regard, refer to Figures 1 to 11This application proposes a multi-fold edge-sealing machine for metal composite sheet 2, comprising: a conveying mechanism 1 having a feeding end 11 and a discharging end 12 for clamping the sheet 2 and driving the sheet 2 to move along the conveying direction; the sheet 2 having an upper layer 21, a core 22 and a lower layer 23 arranged in layers, with the core 22 located between the upper layer 21 and the lower layer 23; and a pre-milling mechanism 3 disposed on one side of the conveying mechanism 1 and adjacent to the feeding end 11 for milling one side edge of the upper layer 21 and the core 22. Furthermore, the depth to which the core 22 is milled is greater than the depth to which the upper plate 21 is milled; the first bending mechanism 4 is located on the side of the pre-milling mechanism 3 near the unloading end 12, and the first bending mechanism 4 includes at least one pressing block 41, the pressing block 41 having a pressing inclined surface 42 on the side facing the transmission mechanism 1, when the plate 2 passes through the first bending mechanism 4, the edge of the upper plate 21 is squeezed upward by the pressing inclined surface 42; the grooving mechanism 5 is located on the side of the first bending mechanism 4 near the unloading end 12. On the side, the grooving mechanism 5 includes at least one grooving wheel 51, which is used to press grooves 24 into the outer edge of the lower plate 23; the second bending mechanism 6 and the third bending mechanism 7 are arranged sequentially on the side of the grooving mechanism 5 near the unloading end 12. The second and third bending mechanisms each include multiple equally spaced pressing columns 71, and the angle between the pressing columns 71 and the horizontal plane gradually increases uniformly along the direction from the loading end 11 to the unloading end 12; a glue dispensing component 6 is also provided between the second bending mechanism and the third bending mechanism. 1. The glue dispensing assembly 61 has a glue dispensing port 62. The second bending mechanism is used to bend the groove 24 along its inner edge. The glue dispensing port 62 applies glue to the surface of the bent portion of the upper plate 21. The third bending mechanism is used to bend the lower plate 23 upward and make it adhere to the surface of the core 22. The shaping mechanism 8 is disposed on the side of the third bending mechanism near the unloading end 12. The shaping mechanism 8 includes at least one shaping pressure roller 81, which is used to press the groove 24 against the glue-applied portion of the upper plate 21.

[0021] For ease of understanding, the following explains some key terms in this embodiment: Metal composite sheet 2 refers to a sheet 2 composed of at least two layers of different materials, typically including an upper sheet 21, a core sheet 22, and a lower sheet 23, wherein the core sheet 22 is located between the upper sheet 21 and the lower sheet 23. The upper sheet 21 and the lower sheet 23 are usually metal materials such as aluminum or stainless steel, while the core sheet 22 can be other lightweight or functional materials.

[0022] The transmission mechanism 1 is a device used to clamp the metal composite sheet 2 and move it in a predetermined direction. It has a loading end 11 and a unloading end 12 to ensure that the sheet 2 can stably and continuously pass through each processing station during the processing.

[0023] The pre-milling mechanism 3 is a device used to mill the edges of the metal composite sheet 2. It cuts the edges of the upper plate 21 and the core plate 22 with a milling cutter 31 to form a specific geometry, providing a basis for subsequent bending and edge sealing operations.

[0024] The first bending mechanism 4 is a device used to initially bend the edge of the upper plate 21 of the metal composite plate 2. It applies pressure to the edge of the plate 2 through the pressure slope 42 of the pressure block 41, causing it to bend upward.

[0025] The grooving mechanism 5 is a device used to press grooves 24 into the outer edge of the lower layer 23 of the metal composite sheet 2. It applies pressure to the surface of the lower layer 23 through the grooving wheel 51 to form grooves 24 with a specific profile.

[0026] The second bending mechanism 6 and the third bending mechanism 7 are devices used to further bend the lower plate 23 of the metal composite sheet 2. These mechanisms gradually change the bending angle of the sheet 2 through a series of pressure columns 71 to achieve precise folding.

[0027] The adhesive dispensing assembly 61 is a device for applying adhesive to a specific surface of the metal composite sheet 2. It has an adhesive dispensing nozzle 62, which can evenly apply the adhesive to the area to be bonded.

[0028] The shaping mechanism 8 is a device used to finally compact and shape the edge banding structure of the metal composite sheet 2. It applies pressure to the bent and glued parts through the shaping roller 81 to ensure a firm bond and form a regular edge banding shape.

[0029] The metal composite sheet folding and edge-sealing machine provided in this embodiment operates as follows: First, the transmission mechanism 1 is used to clamp the metal composite sheet 2 and drive it to move along the transmission direction. The transmission mechanism 1 can be a series of rollers or a transmission belt. The rotational friction of the rollers drives the sheet 2 to move. At the same time, a clamping device, such as a clamping wheel or clamping block, is set above the rollers and the transmission belt to clamp the sheet 2. The sheet 2 can be placed above the rollers, and the rollers provide forward power.

[0030] Subsequently, the pre-milling mechanism 3 mills one edge of the upper plate 21 and the core plate 22 of the sheet material 2. The pre-milling mechanism 3 may include one or more milling cutters 31, which are mounted on a spindle and driven to rotate by a motor. The shape and size of the milling cutters 31 can be customized as needed to achieve milling of the edges of the upper plate 21 and the core plate 22. To achieve a milling depth of the core plate 22 greater than that of the upper plate 21, the relative positions and cutting depths of the different milling cutters 31 are adjusted.

[0031] Next, the sheet 2 enters the first bending mechanism 4, where the edge of the upper sheet 21 is bent upwards by the pressure of the inclined surface 42. The first bending mechanism 4 can be composed of a fixedly installed pressure block 41, the side of which is machined with an inclined pressure surface 42, and the inclination of the inclined surface 42 gradually changes. When the sheet 2 moves along the conveying direction, the edge of its upper sheet 21 contacts the inclined surface 42, and under the thrust of the sheet 2 moving forward, the edge of the upper sheet 21 is gradually pressed upwards, thereby achieving initial bending.

[0032] Furthermore, the grooving mechanism 5 presses out grooves 24 on the outer edge of the lower plate 23. The grooving mechanism 5 may include one or more grooving wheels 51, the edges of which have a specific profile, such as an arc or a V-shape. When the grooving wheel 51 rolls on the outer edge of the lower plate 23, it applies vertical pressure to press out grooves 24 with corresponding profiles on the surface of the lower plate 23.

[0033] Subsequently, the sheet 2 passes sequentially through the second bending mechanism 6 and the third bending mechanism 7. The second bending mechanism 6 and the third bending mechanism 7 can each consist of a series of fixed or adjustable pressure columns 71. These pressure columns 71 are equidistant along the transmission direction, and the angle between each pressure column 71 and the horizontal plane gradually increases relative to the preceding pressure column 71. As the sheet 2 passes through these pressure columns 71, the groove 24 and the edges of the lower plate 23 are progressively squeezed and guided, thereby achieving bending along their inner edges and bending the lower plate 23 upwards and pressing it against the surface of the core 22. Between the second bending mechanism 6 and the third bending mechanism 7, the glue dispensing assembly 61 applies glue to the surface of the bent portion of the upper plate 21 through the glue dispensing port 62. The glue dispensing assembly 61 includes a glue storage tank and a pumping system connected to the glue dispensing port 62. The glue dispensing port 62 can be a simple nozzle or brush head, and by controlling the pumping system, the glue is applied in liquid form to the surface of the bent portion of the upper plate 21.

[0034] Finally, the shaping mechanism 8 presses and tightens the edges of the bent and glued sheet 2. The shaping mechanism 8 may include one or more shaping rollers 81, which are designed to apply continuous and uniform pressure to the edges of the bent and glued sheet 2. Through the rolling pressure of the shaping rollers 81, the groove 24 is ensured to fit tightly against the glued portion of the upper sheet 21, promoting the curing of the glue and achieving the desired shape and density of the edge sealing structure.

[0035] This application achieves automated and integrated edge sealing of the metal composite sheet 2 by integrating processes such as transmission, pre-milling, multi-stage bending, grooving, gluing, and shaping. This eliminates the reliance on external materials in traditional patch welding, utilizing the sheet 2's own material to form a structured edge seal. Simultaneously, by pressing grooves 24 along the outer edge of the lower plate 23, a structure is provided for the edge-sealed sheet 2 to directly interface with external mounting structures, simplifying the installation and fixing process and reducing the need for additional devices and tools.

[0036] In some of the solutions mentioned above in this application, the metal composite sheet 2 is edge-sealed by multiple folds. However, after the edge-sealing is completed, the edge of the sheet 2 is often flat and lacks a connection interface that directly cooperates with the external installation structure. This means that in the subsequent installation and fixing process, it is necessary to rely on additional auxiliary devices or complex tools for fixing, which increases the difficulty and cost of installation.

[0037] In this regard, this application further proposes that the groove 24 is a V-shaped groove, and after the groove 24 is tightly bonded to the upper plate 21, a protruding ridge 25 is formed on the back of the groove 24, and the protruding ridge 25 is used to be snapped and fixed with the external snap-fit ​​structure.

[0038] Specifically, the groove 24 is designed as a V-groove. A V-groove refers to a recessed structure with a V-shaped cross-section formed on the surface of a material, typically with a sharp bottom and sloping sidewalls. This V-groove design facilitates subsequent precise bending, ensuring a smooth bending process and accurate positioning. Furthermore, its specific geometry forms the basis for the subsequent formation of the protruding ridge 25. In actual operation, the grooving wheel 51 in the grooving mechanism 5 can be designed with a V-shaped cross-section profile, forming the V-groove by rolling and pressing against the outer edge of the lower plate 23.

[0039] After the V-groove is bent by the second bending mechanism 6 and the third bending mechanism 7, and pressed tightly against the upper plate 21 coated with adhesive by the shaping roller 81 of the shaping mechanism 8, a protruding ridge 25 will naturally form on the back of the groove 24. This protruding ridge 25 refers to a strip-shaped structure protruding from the plane of the plate 2 and formed on the back of the edge-sealing area of ​​the plate 2. Its formation principle is that during the bending and pressing process, the two sidewalls of the V-groove converge inwards and fit tightly against the bent portion of the upper plate 21, while the original groove bottom protrudes outwards, thus forming a protruding ridge 25 with a specific shape and size. The shape and size of this protruding ridge 25 are closely related to the geometric parameters of the V-groove and the thickness of the plate 2, and are key to achieving cooperation with the external snap-fit ​​structure.

[0040] The protruding ridge 25 is used for snap-fit ​​fixing with the external snap-fit ​​structure. The external snap-fit ​​structure refers to an external installation component that mates with the protruding ridge 25 after the metal composite panel 2 is edge-sealed, enabling a quick and stable connection. As a connection interface formed by the panel 2 itself, the protruding ridge 25 can directly engage mechanically with the external snap-fit ​​structure, thereby achieving the installation and fixing of the panel 2 and avoiding the need for additional installation parts. For example, the external snap-fit ​​structure can be designed with a groove 24 or slot that matches the shape of the protruding ridge 25, such as a door frame keel structure or wall hanging, where the protruding ridge 25 is inserted into or slid into the slot for fixing. Alternatively, the external snap-fit ​​structure can also be a component with an elastic buckle or locking mechanism; when the protruding ridge 25 enters the predetermined position, the buckle automatically locks, enabling quick installation and disassembly.

[0041] Through the above technical solution, the groove 24 pressed out by the grooving mechanism 5 is specifically defined as a V-shaped groove, and during the subsequent bending and bonding process, it is pressed tightly against the upper plate 21, thereby naturally forming a convex ridge 25 with a specific geometric shape on the back of the groove 24. This design allows the metal composite panel 2 to have edges that are not merely simple closed structures after the edge sealing process is completed, but rather functional interfaces that can directly engage with external snap-fit ​​structures. For example, the convex ridge 25 can be snapped and fixed with external snap-fit ​​structures such as door frame keel structures and wall hangings, thus eliminating the need for additional connectors or auxiliary tools during installation. This integrated design significantly simplifies the installation process of the panel 2, reduces installation difficulty and cost, and improves the overall structural stability and aesthetics.

[0042] In some of the embodiments described above in this application, a grooving mechanism 5 is proposed to press out a groove 24 on the outer edge of the lower plate 23. However, in the process of its implementation, when bending is performed later, due to the rigidity and thickness limitations of the material of the lower plate 23, directly bending the groove 24 can easily cause irregular deformation or stress concentration at the edge of the plate 2, making it difficult to ensure the accuracy of the bending angle and the flatness of the edge, thereby affecting the edge sealing quality.

[0043] In this regard, this application further proposes that the metal composite sheet 2 multiple folding edge banding machine also includes a first grooving component 91. The first grooving component 91 includes at least a vertically arranged saw blade 911. The first grooving component 91 is located between the first bending mechanism 4 and the pressing mechanism 5, and is used to saw a first bending groove 26 on the surface of the lower plate 23. The groove 24 is located outside the first bending groove 26. The second bending mechanism 6 bends the groove 24 along the first bending groove 26.

[0044] Specifically, the first grooving assembly 91 is a device for pre-processing the surface of the sheet 2 to form a specific groove structure. Its core function is to create predetermined weakening areas or guide lines on the material through mechanical cutting to assist subsequent forming operations. This assembly can consist of one or more high-speed rotating cutting tools, such as a motor-driven milling cutter 31 or a saw blade 911, mounted on a support that allows precise control of position and depth. The type and size of the cutting tools can be selected according to the material of the sheet 2 and the desired groove shape. The vertically positioned saw blade 911 is the main cutting tool in the first grooving assembly 91, its function being to precisely cut the surface of the lower sheet 23 to form the first bending groove 26. Its vertical positioning ensures the depth of the groove and the perpendicularity of the sidewalls, providing an accurate geometric reference for subsequent bending. The saw blade 911 is a circular saw blade 911, driven by a spindle motor to rotate at high speed, and its vertical cutting depth and horizontal feed speed are controlled by a feed mechanism. The tooth shape and material of the saw blade 911 can be optimized according to the material of the lower plate 23 to obtain the best cutting effect and surface quality.

[0045] The first bending groove 26 is a linear groove 24 pre-cut into the surface of the lower plate 23. Its main function is to serve as a stress concentration point and guide line for subsequent bending operations. By forming a material thinning area at a specific location on the plate 2, the bending stiffness of that area is reduced, allowing the plate 2 to preferentially undergo plastic deformation along the groove line when subjected to bending force, thereby achieving precise and smooth bending. The depth and width of the first bending groove 26 need to be precisely designed according to the thickness, material, and required bending angle of the lower plate 23. Its depth will penetrate a portion of the thickness of the lower plate 23, but will not completely cut it off, in order to maintain the integrity of the plate 2. The groove 24 is located outside the first bending groove 26. This spatial arrangement ensures that when the second bending mechanism 6 performs bending, the bending force acts first on the groove 24, with the first bending groove 26 serving as the bending baseline. The first bending groove 26 is located inside the groove 24, providing a clear "hinge" point for the bending of the groove 24, so that the groove 24 can bend precisely inward or upward along a preset path, avoiding random deformation of the material and irregularity of the edges during the bending process.

[0046] Through the above technical solution, this application introduces a first grooving component 91 to pre-process a first bending groove 26 on the surface of the lower plate 23, thereby pre-setting a stress release path for subsequent bending operations in terms of physical structure. By setting the groove 24 on the outside of the first bending groove 26, the second bending mechanism 6 can guide the plate 2 to deform along the preset groove when performing the bending action. This design effectively reduces the material resistance during the bending process and avoids uneven bending or edge cracking caused by material rigidity. Using a vertically set saw blade 911 for grooving ensures that the depth and position of the groove are precisely controllable, providing a reliable geometric reference for the precise folding of the subsequent second bending mechanism 6. Through this collaborative process of grooving first, pressing the groove, and then bending, not only is the geometric shape of the edge sealing structure regular, but the structural stability of the plate 2 after edge bending is also significantly improved, ensuring the continuity and consistency of the edge sealing process.

[0047] In some of the solutions described above in this application, the groove 24 is bent along the first bending groove 26 by the second bending mechanism 6 to achieve preliminary treatment of the edge of the lower plate 23. However, in the process of implementation, due to the lack of a targeted guiding structure, the lower plate 23 is prone to uneven deformation or stress concentration when bent as a whole, resulting in poor final bonding effect and difficulty in ensuring the stability of the edge sealing quality.

[0048] In this regard, this application further proposes that the metal composite sheet 2 multiple folding edge banding machine also includes a second grooving component 92, the second grooving component 92 includes at least a vertically arranged saw blade 911, the second grooving component 92 is located between the second bending mechanism 6 and the glue dispensing component 61, and is used to saw a second bending groove 27 on the surface of the connection between the lower layer board 23 and the core board 22, and the third bending mechanism 7 bends the lower layer board 23 along the second bending groove 27.

[0049] Specifically, the second grooving assembly 92, like the first grooving assembly 91, is a device used for grooving at specific locations on the sheet metal 2. Its core function is to form grooves of a predetermined shape and depth on the material surface through mechanical cutting, thereby altering the local mechanical properties of the material or providing guidance for subsequent processing. The second grooving assembly 92 can use a high-speed rotating milling cutter 31 or a saw blade 911 for cutting. By precisely controlling the feed rate and cutting depth of the cutter, fine grooving of the sheet metal 2 can be achieved. The vertically positioned saw blade 911, as the core cutting component of the second grooving assembly 92, has its rotation axis perpendicular to the transmission direction of the sheet metal 2, and its plane is perpendicular to the surface of the sheet metal 2, ensuring that the saw blade 911 can cut vertically downwards into the sheet metal 2, forming a groove with uniform depth and vertical sidewalls. The saw blade 911 can be made of wear-resistant materials such as high-speed steel, cemented carbide, or diamond. Driven by a motor, it rotates at high speed, and with the assistance of a precise lifting and feeding mechanism, it achieves stable cutting of the sheet metal 2.

[0050] The second bending groove 27 is a linear groove 24 pre-machined on the surface of the connection between the lower plate 23 and the core plate 22. This groove serves as a mechanically weakening area and a bending guide line, designed to reduce the bending resistance of the material in this area and guide the material to bend precisely along a predetermined path. The depth and width of the second bending groove 27 can be precisely designed according to the thickness and material of the plate 2 and the required bending angle to ensure thorough bending.

[0051] Through the above technical solution, a second grooving component 92 is added between the second bending mechanism 6 and the glue dispensing component 61, and a second bending groove 27 is pre-processed at the connection between the lower layer board 23 and the core board 22, thereby providing precise crease guidance for the subsequent bending action of the third bending mechanism 7. By pre-setting creases at the connection, the bending resistance of the lower layer board 23 during the upward bending process can be effectively reduced, ensuring that the lower layer board 23 can be accurately folded along the predetermined trajectory, avoiding problems such as bending position deviation or irregular deformation caused by material rigidity. The second bending groove 27 formed by the second grooving component 92 allows the third bending mechanism 7 to concentrate stress at the preset groove position when performing the bending action, thereby enabling the lower layer board 23 to be flat and tightly attached to the surface of the core board 22, significantly improving the accuracy and structural strength of the edge sealing process, and ensuring the continuity and reliability of the multiple folding edge sealing process.

[0052] In some of the solutions mentioned above in this application, a structure is proposed to achieve edge treatment of the board 2 by multiple folding and edge sealing. However, after the folding and edge sealing is completed, the geometry of the edge of the board 2 is often relatively regular and simple. When it is installed or used in conjunction with other components, the existing edge sealing structure cannot directly provide a suitable interface. This results in the need for additional secondary processing when fine assembly is performed or when specific spaces need to be avoided, which increases the complexity of the production process.

[0053] In this regard, this application further proposes that the metal composite sheet 2 multiple folding edge sealing machine also includes an opening component 93. The opening component 93 is disposed on the side of the shaping mechanism 8 near the unloading end 12. The opening component 93 includes at least a grinding block 931, which is used to grind rectangular notches at the corners of the bent portions of the upper plate 21 and the lower plate 23.

[0054] The opening component 93 is a device for creating specific geometric cuts or grooves 24 on the edge of the sheet material 2. Its main function is to perform secondary fine processing on the edge of the sheet material 2 after initial folding and shaping to form a structure with specific functions. In addition to the grinding block 931 specifically mentioned in this application, the opening component 93 can also take other forms. For example, a high-speed rotating milling cutter 31 can be used to mill the edge of the sheet material 2, or a laser cutting head can be used to perform non-contact cutting of the material with a high-energy laser beam to achieve the formation of a rectangular notch.

[0055] The grinding block 931 is the core component of the opening assembly 93. It is typically made of a grinding material, such as diamond, silicon carbide, or alumina, and is bonded together with an adhesive. The grinding block 931 can be designed as a fixed type, where the plate 2 contacts and grinds the fixed-shaped grinding block 931 during movement; or it can be designed as a rotary grinding wheel or a reciprocating grinding block 931, which grinds the edge of the plate 2 through its own movement. The shape and size of the grinding block 931 can be customized according to the specific geometric parameters of the required rectangular notch to ensure processing accuracy and efficiency.

[0056] The shaping mechanism 8 plays a role in the final shaping and fixing of the edge of the board 2 throughout the edge sealing process. The opening component 93 is located on the side of the shaping mechanism 8 near the unloading end 12. This means that after the edge of the board 2 has been compacted and shaped by the shaping mechanism 8, its structure is relatively stable. At this time, grooving can be performed to avoid deformation or damage to the formed edge structure in subsequent processing, thereby ensuring the accuracy of grooving and the quality of the final product.

[0057] The corners of the bent portions of the upper plate 21 and the lower plate 23 refer to the outer corners of the connecting parts of the metal composite sheet 2 after multiple folds and edge sealing. These corners are usually areas with a large amount of material buildup or where the geometry needs further optimization. By grinding these specific areas, excess material can be precisely removed to form the required rectangular notches.

[0058] The rectangular notch is a groove 24 or cut with a defined geometry, featuring right-angled edges and a flat bottom. This specific notch shape not only effectively removes excess material and reduces edge thickness, but more importantly, it provides a standardized physical interface for subsequent installation, positioning, or embedded connection with other structural components. For example, the rectangular notch can be used for precise engagement with external clips, locating pins, or connectors to achieve rapid and stable installation of the sheet metal 2.

[0059] Through the above technical solution, after the metal composite sheet 2 has been folded, edge-sealed, and shaped, this application further introduces an opening component 93. A grinding block 931 is used to finely grind the corners of the bent portions of the upper plate 21 and the lower plate 23, thereby forming a rectangular notch. This design effectively solves the problem that traditional edge-sealing sheet 2 has a single edge shape and is difficult to directly integrate with external structures. By integrating a grooving function at the end of the edge-sealing process, the sheet 2 has a specific functional interface on its edge when it leaves the edge-sealing machine, meeting subsequent assembly requirements without additional offline processing. This not only significantly improves the processing accuracy and functional integration of the metal composite sheet 2, but also simplifies the overall production process, reduces the complexity of subsequent installation, and thus improves production efficiency and product adaptability.

[0060] In some of the solutions mentioned above in this application, it is proposed to perform edge sealing treatment on the metal composite plate 2 by shaping mechanism 8. However, in actual installation and application scenarios, the edge-sealed plate 2 often needs to be connected or fixed to the external structure. When facing specific installation requirements, the existing edge sealing structure lacks a direct connection interface, which leads to the need for additional drilling or processing in the subsequent installation process, increasing the construction difficulty and procedures.

[0061] In this regard, this application further proposes that the metal composite sheet 2 multi-fold edge banding machine also includes a hole-opening component 94, which is disposed on the side of the grooving component near the unloading end 12. The hole-opening component 94 includes at least one drill bit 941 for drilling through holes in the bent parts of the upper plate 21 and the lower plate 23.

[0062] Specifically, the hole-making assembly 94 is a mechanical device responsible for forming holes at specific locations on the sheet 2. The hole-making assembly 94 can be implemented in various ways; for example, it can be a fixed or movable drilling unit that drives the drill bit 941 to drill holes via pneumatic, hydraulic, or electric means to adapt to different sheet 2 specifications and hole position requirements.

[0063] Drill bit 941 is a cutting tool used to drill holes in materials. This drill bit 941 can be a twist drill, suitable for drilling general-purpose materials, and has good chip removal capabilities, ensuring a smooth drilling process. Alternatively, a center drill or step drill can be used for positioning holes in specific locations or for drilling holes of different diameters in a single pass to meet diverse installation needs. For hard materials such as metals, carbide drill bit 941 can also be used to obtain higher wear resistance and cutting efficiency.

[0064] The step of drilling through holes in the bent portions of the upper and lower panels 21 and 23 aims to create through holes in specific areas after the edges of the panels 2 are sealed, providing an interface for subsequent installation connections. This can be achieved by precisely controlling the movement trajectory of the drilling assembly 94 and the feed depth of the drill bit 941, ensuring that the holes accurately penetrate the bent portions of the upper and lower panels 21 and 23. Simultaneously, a preset program can be used to automatically adjust the drilling position and number according to the specifications of the panels 2 and installation requirements, thereby achieving automated and standardized hole processing.

[0065] Through the above technical solution, after the metal composite sheet 2 is edge-sealed by the forming mechanism 8 and the corners are ground by the grooving assembly, the drill bit 941 in the drilling assembly 94 drills through holes in the bent surfaces of the upper plate 21 and the lower plate 23 before the sheet 2 leaves the edge-sealing machine. This design integrates multiple processing steps such as edge-sealing, grooving, and drilling on the same equipment, realizing the continuity and automation of sheet 2 processing, effectively avoiding secondary processing of sheet 2 after it leaves the factory, and significantly improving production efficiency. The pre-drilled through holes provide a standardized interface for subsequent bolt connections, riveting, or other fastener installations, eliminating the need for additional drilling during on-site installation of sheet 2, greatly simplifying the installation process and reducing construction difficulty and cost. Since the drilling is performed inside the equipment after edge-sealing and grooving, it ensures precise alignment of the hole position with the edge-sealing structure, avoiding errors that may be caused by manual operation, and ensuring the processing quality of the holes and the integrity of the edge-sealing structure. In addition, drilling in the bent parts can make full use of the strength of the edge-sealing structure itself, providing reliable support for the connection and enhancing the stability of the overall structure.

[0066] In some of the solutions described above in this application, a pre-milling mechanism 3 is proposed to mill the edges of the upper plate 21 and the core plate 22. However, in actual processing, if only a single milling method is used, it is difficult to differentiate the physical characteristics of different material layers (upper plate 21 and core plate 22) in the composite board 2, resulting in insufficient edge milling precision and easy to cause burr residue or uneven delamination on the edge of the board 2, affecting the quality of subsequent folding and sealing.

[0067] In response, this application proposes an improved pre-milling mechanism 3, which includes two pre-milling components, each of which includes at least two milling cutters 31 arranged at intervals, and the two pre-milling components respectively mill one side edge of the upper plate 21 and the core plate 22.

[0068] Specifically, the pre-milling mechanism 3, as an important component of the multi-fold edge-sealing machine for the metal composite sheet 2, primarily functions to perform preliminary processing on the edges of the sheet 2, providing a precise reference for subsequent bending and edge-sealing processes. To address the processing challenges posed by the multi-layered structure of the composite sheet 2, this application designs the pre-milling mechanism 3 to include two pre-milling components. These two pre-milling components can be arranged side-by-side on one side of the transmission mechanism 1, respectively milling the upper layer sheet 21 and the core sheet 22, or they can be staggered to accommodate composite sheets 2 of different thicknesses or materials. Furthermore, the two pre-milling components are equipped with independent drive motors and control units, enabling them to independently adjust processing parameters such as rotational speed, feed rate, and depth of cut according to the respective material characteristics (such as hardness, toughness, and thickness) of the upper layer sheet 21 and the core sheet 22, achieving differentiated and refined milling.

[0069] Each pre-milling assembly contains at least two end mills 31 arranged at intervals. These end mills 31 are not closely spaced, but rather spaced apart. This spaced arrangement is designed to distribute the overall cutting load across multiple tools, effectively reducing the stress on a single end mill 31 and thus minimizing vibration and heat generated during machining. For example, the end mills 31 may be arranged in a stepped pattern, meaning that the cutting depths of different end mills 31 vary slightly, enabling layered or step-by-step cutting and avoiding the impact on the material caused by a single deep cut. In practical applications, the material and coating of the end mills 31 can be optimized according to the material to be milled. For example, for a high-hardness metal upper plate 21, a carbide end mill 31 can be used; for the core material 22, a high-speed steel end mill 31 or a special composite material end mill 31 can be used to ensure optimal cutting performance and tool life.

[0070] By using the two pre-milling components to mill one edge of the upper layer plate 21 and the core plate 22 respectively, precise processing of different layers of the composite material 2 is achieved. One pre-milling component is specifically responsible for milling the edge of the metal upper layer plate 21 to ensure its flatness and dimensional accuracy; the other pre-milling component is specifically responsible for milling the edge of the core plate 22, and the milling depth can be adjusted as needed to make it greater than the milling depth of the upper layer plate 21, leaving room for subsequent bending operations. This layered milling method can effectively avoid processing defects caused by material differences, such as burrs on the edge of the upper layer plate 21 and delamination between the core plate 22 and the upper layer plate 21.

[0071] By employing the aforementioned technical solution, this application addresses the issues of significant material differences between the upper layer 21 and the core 22 in the composite sheet 2, insufficient precision of a single milling method, and the tendency to generate burrs and delamination. It designs the pre-milling mechanism 3 as two pre-milling components, each equipped with at least two spaced-apart milling cutters 31, achieving independent and precise milling of the upper layer 21 and the core 22. The two pre-milling components can independently adjust milling parameters according to the respective physical characteristics (such as hardness and thickness) of the upper layer 21 and the core 22, ensuring the processing accuracy and surface quality of each layer's edges. The spaced-apart design of multiple milling cutters 31 effectively disperses the cutting load, reducing vibration and cutting force during processing, thereby preventing deformation, burrs, and delamination at the edges of the sheet 2. This differentiated, segmented precision milling provides a high-precision edge reference for subsequent bending, grooving, and edge sealing processes, significantly improving the structural strength, appearance flatness, and overall quality of the metal composite sheet 2 after edge sealing.

[0072] In some of the solutions described above in this application, a pre-milling assembly is proposed for milling the edge of the plate 2. However, during high-speed milling, the milling cutter 31 will generate a large amount of metal chips. If these chips are not cleaned or protected in time, they will not only splash onto other precision parts of the equipment, causing wear or failure, but may also threaten the safety of the operator. Moreover, the accumulation of chips will affect the milling accuracy.

[0073] In this regard, this application further proposes that the pre-milling assembly also includes a protective shell 32, which partially covers the milling cutter 31, and the protective shell 32 has a chip outlet 33.

[0074] The protective shell 32 is a physical barrier used to isolate the milling area, its main function being to effectively prevent metal chips generated during milling from splashing outwards in a disorderly manner. Specifically, the protective shell 32 can be constructed from metal sheet 2, such as steel or aluminum sheet, through welding, riveting, or bolting to form a closed or semi-closed cavity. Alternatively, the protective shell 32 can be made of high-strength engineering plastics, such as polycarbonate or ABS, integrally molded through injection molding or thermoforming processes. Such materials provide protection while also possessing a certain degree of transparency, facilitating operator observation of the milling process. The protective shell 32 partially encloses the milling cutter 31, aiming to ensure that all chips generated during milling are effectively confined within the internal space of the protective shell 32, preventing their leakage. Specifically, the internal dimensions and shape of the protective shell 32 can closely match the working area of ​​the milling cutter 31, covering the cutting edge of the milling cutter 31 during cutting operations, while leaving necessary clearance to avoid mechanical interference with the milling cutter 31 or the sheet 2. This enclosure is semi-enclosed, with an observation window at the top, but it still needs to effectively block the path of flying debris. The chip outlet 33 is one or more openings provided on the protective shell 32, which function to provide a directional discharge channel for the chips generated during milling. Specifically, the chip outlet 33 can be designed as circular, rectangular, or other geometries suitable for connecting to an external chip removal system. In addition, the chip outlet 33 can also integrate auxiliary chip removal devices, such as small fans or airflow nozzles, to actively blow chips towards a designated collection area by generating directional airflow, further improving chip removal efficiency.

[0075] By adding a protective shell 32 and a chip outlet 33 to the pre-milling assembly, this technical solution effectively solves the problem of chip splashing and accumulation during milling. The protective shell 32 partially encloses the milling cutter 31, forming a physical isolation area that significantly prevents the disorderly splashing of metal chips generated during milling. This protects the precision transmission components and control system inside the equipment from corrosion by metal dust, effectively extending the service life of the equipment and reducing the risk of failure caused by chips. Simultaneously, the chip outlet 33 on the protective shell 32 provides a centralized discharge channel for chips. Combined with an external dust extraction or chip removal system, chips can be efficiently and promptly removed from the processing area. This not only avoids the problems of secondary cutting, increased processing resistance, or decreased milling accuracy that may result from chip accumulation around the milling cutter 31, ensuring the continuity and stability of the milling process, but also significantly improves the safety of operators and reduces the potential harm of chips to the human body. This structural design, while ensuring a clean processing environment, also provides a flat, impurity-free edge base for the subsequent folding and edge-sealing processes of the sheet metal 2.

[0076] In some of the solutions described above in this application, a transmission mechanism 1 is proposed to drive the sheet 2 to move. However, in the actual edge banding process, since the metal composite sheet 2 has a multi-layer structure and needs to undergo multiple complex processes such as folding, milling, and grooving, if the transmission mechanism 1 only adopts a simple clamping method, it is easy for the sheet 2 to shift, shake, or slip when it is transmitted at high speed or subjected to external processing forces, which will affect the accuracy of subsequent folding and grooving, resulting in unstable edge banding quality.

[0077] In this regard, this application further proposes that the transmission mechanism 1 includes a vertically distributed upper transmission belt 13 and a lower transmission belt 14, with a transmission gap between them, and the plate 2 is placed in the transmission gap and clamped and fixed by the upper transmission belt 13 and the lower transmission belt 14.

[0078] The conveying mechanism 1 is the core component responsible for transporting the sheet 2 from the loading end 11 to the unloading end 12 and moving it along a preset conveying direction. Its stability directly affects the accuracy of subsequent processing steps. The vertically distributed upper conveyor belt 13 and lower conveyor belt 14 refer to two conveyor belts located above and below the sheet 2, respectively, with their effective conveying surfaces facing each other vertically. This configuration aims to apply clamping force from both the upper and lower sides of the sheet 2 to achieve stable conveying. Specifically, the upper conveyor belt 13 and lower conveyor belt 14 can adopt a synchronous belt system, using toothed meshing or high-friction surfaces to synchronously drive the sheet 2 from both the upper and lower sides, thereby providing precise synchronization and strong clamping force; alternatively, the conveyor belt can be a flat belt with a high coefficient of friction, combined with adjustable pressure rollers, to apply a uniform clamping force to the sheet 2, ensuring close contact between the conveyor belt and the sheet 2. The conveying gap is the space formed between the upper conveyor belt 13 and lower conveyor belt 14 to accommodate the sheet 2. The size of this gap can be adjusted according to the thickness of the sheet 2 to ensure effective clamping of the sheet 2. For example, the transmission gap can be preset to be slightly smaller than the thickness of the plate 2, and with the help of a conveyor belt or pressure roller with a certain degree of elasticity, the plate 2 can be elastically clamped. The plate 2 being placed in the transmission gap and clamped and fixed by the upper conveyor belt 13 and the lower conveyor belt 14 means that the plate 2 is inserted into the space between the upper conveyor belt 13 and the lower conveyor belt 14, and is firmly fixed by the friction and pressure applied by the conveyor belts to prevent relative displacement during transmission.

[0079] Through the above technical solution, the transmission mechanism 1 uses vertically distributed upper transmission belt 13 and lower transmission belt 14 to clamp the sheet material 2 in both directions, effectively solving the problems of offset, shaking, or slippage caused by uneven force when the sheet material 2 undergoes complex processes such as pre-milling, bending, and grooving. This upper and lower clamping fixing method ensures that the sheet material 2 maintains a high degree of stability during transmission, providing a solid benchmark for subsequent precision processing. This not only significantly improves the overall reliability of the edge banding process and ensures processing accuracy, but also avoids processing defects caused by the instability of the sheet material 2, thereby improving product quality and production efficiency.

[0080] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0081] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A multi-folding edge-sealing machine for metal composite sheets, characterized in that, include: A conveying mechanism having a loading end and a unloading end for clamping the plate and driving the plate to move along the conveying direction, the plate having an upper plate, a core plate and a lower plate arranged in layers, the core plate being located between the upper plate and the lower plate; A pre-milling mechanism is provided on one side of the transmission mechanism and adjacent to the feeding end. It is used to mill one edge of the upper plate and the core, and the depth of milling the core is greater than the depth of milling the upper plate. The first bending mechanism is located on the side of the pre-milling mechanism near the unloading end. The first bending mechanism includes at least one pressing block. The pressing block has a pressing slope on the side facing the transmission mechanism. When the plate passes through the first bending mechanism, the edge of the upper plate is squeezed by the pressing slope and bent upward. A grooving mechanism is provided on the side of the first bending mechanism near the unloading end. The grooving mechanism includes at least one grooving wheel, which is used to press a groove into the outer edge of the lower plate. A second bending mechanism and a third bending mechanism are sequentially arranged on the side of the pressing mechanism near the unloading end. Both the second and third bending mechanisms include multiple equally spaced pressing columns, and the angle between the pressing columns and the horizontal plane gradually and uniformly increases along the direction from the loading end to the unloading end. A glue dispensing assembly is also provided between the second and third bending mechanisms. The glue dispensing assembly has a glue outlet. The second bending mechanism is used to bend the groove along its inner edge, and the glue outlet applies glue to the surface of the bent portion of the upper plate. The third bending mechanism is used to bend the lower plate upward and make it adhere tightly to the core surface. A shaping mechanism is provided on the side of the third bending mechanism near the unloading end. The shaping mechanism includes at least one shaping pressure roller, which is used to press the groove against the glued portion of the upper plate. The groove is a V-shaped groove. After the groove is pressed against and bonded to the upper plate, a convex ridge is formed on the back of the groove. The convex ridge is used to be snapped and fixed with an external snap-fit ​​structure. The first grooving assembly includes at least one vertically arranged saw blade. The first grooving assembly is located between the first bending mechanism and the grooving mechanism and is used to cut a first bending groove on the surface of the lower plate. The groove is located outside the first bending groove. The second bending mechanism bends the groove along the first bending groove. The second grooving assembly includes at least one vertically arranged saw blade. The second grooving assembly is located between the second bending mechanism and the glue dispensing assembly. It is used to cut a second bending groove on the surface of the connection between the lower layer board and the core board. The third bending mechanism bends the lower layer board along the second bending groove.

2. The metal composite sheet multi-folding edge-sealing machine according to claim 1, characterized in that, The metal composite sheet folding edge banding machine also includes an opening assembly, which is located on the side of the forming mechanism near the unloading end. The opening assembly includes at least one grinding block for grinding rectangular notches at the corners of the bent portions of the upper and lower sheets.

3. The metal composite sheet multi-folding edge-sealing machine according to claim 2, characterized in that, The metal composite sheet folding edge banding machine also includes a hole-opening component, which is located on the side of the opening component near the material feeding end. The hole-opening component includes at least one drill bit for drilling through holes in the bent parts of the upper and lower sheets.

4. The metal composite sheet multiple folding and edge-sealing machine according to claim 1, characterized in that, The pre-milling mechanism includes two pre-milling components, each of which includes at least two milling cutters arranged at intervals. The two pre-milling components respectively mill one side edge of the upper plate and the core plate.

5. The metal composite sheet multi-folding edge-sealing machine according to claim 4, characterized in that, The pre-milling assembly also includes a protective shell that covers the milling cutter portion, and the protective shell has a chip outlet.

6. The metal composite sheet multi-folding edge-sealing machine according to claim 1, characterized in that, The transmission mechanism includes a vertically distributed upper transmission belt and a lower transmission belt, with a transmission gap between them. The plate is placed in the transmission gap and clamped and fixed by the upper and lower transmission belts.

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