Fiber PTFE-coated aluminum plate and production device thereof

Abstract

The application discloses a kind of fiber PTFE film-coated aluminum plate and its production device, it is characterized in that, including aluminum plate layer, adhesive layer, fiber layer and PTFE layer, the aluminum plate layer is mutually compounded and bonded with fiber layer by adhesive layer, the PTFE layer covers in fiber layer back to the side of aluminum plate layer;The fiber layer is formed with several wrinkle parts, and each wrinkle part is formed along the width direction of aluminum plate layer arrangement;Each wrinkle part is evenly arranged along the length direction of aluminum plate layer.In the application, wrinkle part is evenly arranged along the length direction of aluminum plate layer, and deformation compensation can be formed in the length direction of aluminum plate layer by wrinkle part.

Description

Technical Field

[0001] This invention relates to an aluminum sheet, and more specifically, to a fiber PTFE-coated aluminum sheet, and also to a production apparatus for the fiber PTFE-coated aluminum sheet. Background Technology

[0002] PTFE-coated aluminum composite panels, as a new type of building material, have attracted much attention due to their unique properties. PTFE (polytetrafluoroethylene) possesses excellent corrosion resistance, weather resistance, self-cleaning properties, and high light transmittance, while aluminum composite panels are known for their lightweight, high strength, and good processing performance. A fiberglass layer is first bonded to the surface of the aluminum composite panel, providing a protective layer of fiberglass. Then, a PTFE layer is coated on top. Applying PTFE to the surface of the aluminum composite panel not only enhances the aesthetics of the building but also strengthens its durability and functionality.

[0003] However, due to the significant difference in thermal expansion coefficients between glass fiber and aluminum (glass fiber has a relatively smaller coefficient, while aluminum has a relatively larger coefficient), in applications with large temperature differences, a significant deformation difference will occur between the aluminum layer and the fiber layer in the sheet material. This is especially true for long, strip-shaped sheets, where the entire sheet will bend, meaning the aluminum layer has poor elongation and will bulge outwards, causing distortion and negatively impacting the overall stability and other strength properties of the component.

[0004] Therefore, a new solution is needed to address this problem. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fiber PTFE coated aluminum plate and its production apparatus.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a fiber PTFE-coated aluminum plate, characterized in that it comprises an aluminum plate layer, an adhesive layer, a fiber layer, and a PTFE layer, wherein the aluminum plate layer and the fiber layer are bonded together by the adhesive layer, and the PTFE layer covers the side of the fiber layer facing away from the aluminum plate layer; the fiber layer has a plurality of folds, each fold being formed along the width direction of the aluminum plate layer; and each fold is evenly distributed along the length direction of the aluminum plate layer.

[0007] The present invention is further configured such that the fiber layer is a glass fiber layer, and the pleats form a buffer for the fiber layer to stretch and deform.

[0008] The present invention is further configured such that the fiber layer includes longitudinal fiber filaments and transverse fiber filaments, which are interwoven with each other; the longitudinal fiber filaments are arranged along the length direction of the aluminum plate layer, and the transverse fiber filaments are arranged along the width direction of the aluminum plate layer.

[0009] The present invention is further configured such that the diameter of the longitudinal fiber filament is larger than the diameter of the transverse fiber filament; from the cross-sectional direction, the longitudinal fiber filament is arranged coplanarly along the fiber layer, and the transverse fiber filament is alternately bent and woven between the longitudinal fiber filament.

[0010] The present invention is further configured such that the longitudinal fiber filament includes a fiber core and an outer covering layer, the outer covering layer being a PTFE coating and covering the fiber core; the diameter of the longitudinal fiber filament is - times the diameter of the transverse fiber filament.

[0011] The present invention is further configured such that the pleats of the fiber layer are formed with creases along the width direction of the fiber layer; the creases are formed by folding the fiber layer and hot pressing;

[0012] The present invention is further configured such that the front and back sides of the folded portion are respectively formed with an inner concave side and an outer convex side, and the inner concave side faces the direction of the aluminum plate layer.

[0013] The present invention is further configured such that the outward convex side of the pleated portion protrudes in the direction opposite to the aluminum plate layer, and the PTFE layer covers the fiber layer and covers the pleated portion inside.

[0014] The present invention is further configured such that, during the composite bonding process, the fiber layer is composited through a fiber layer composite mechanism;

[0015] The present invention is further configured such that an adhesive layer is pre-coated on the surface of the aluminum plate layer, and then the fiber layer is bonded to the surface of the adhesive layer; the fiber layer composite mechanism includes a support roller and a pressure roller, the pressure roller being located directly above the support roller, and the pressure roller and the support roller cooperating with each other to pressurize the fiber layer onto the adhesive layer;

[0016] The present invention is further configured such that a plurality of receiving recesses are provided on the outer periphery of the pressure roller, the receiving recesses correspond to the folds of the fiber layer, each receiving recess is arranged along the axial direction of the pressure roller, and the receiving recesses are distributed in a ring array.

[0017] The present invention is further configured such that the fiber layer composite mechanism further includes a second support roller and a second pressure roller, the second support roller and the second pressure roller being located downstream of the first support roller, and the second support roller and the second pressure roller being used to supplement the pressing of the fiber layer and the aluminum plate layer.

[0018] The present invention is further configured such that the fiber layer composite mechanism also includes a heat drying module, which is located between support roller one and support roller two, and is capable of initially drying the adhesive layer.

[0019] The present invention is further configured such that the wrinkled portion of the fiber layer is pre-processed by a fiber layer pre-processing mechanism, the fiber layer pre-processing mechanism including a hot press mold base, a lifting base and a pressing block, the upper side of the hot press mold base is provided with a hot press mold groove, the lifting base is located on the upper side of the hot press mold base and can be adjusted up and down; the pressing block is installed on the lifting base, the pressing block is vertically opposite to the hot press mold groove, and is used to press and form the wrinkled portion in the hot press mold groove.

[0020] The present invention is further configured such that the fiber layer pretreatment mechanism further includes a glue-applying mold base, the glue-applying mold base is located downstream of the hot press mold base, the glue-applying mold base has a glue-applying groove on its upper side, a pressure block two is arranged directly above the glue-applying groove, the pressure block two is installed on the lifting seat and can move up and down with the lifting seat; a glue-applying groove is formed in the middle of the inner side of the glue-applying groove, and the glue-applying groove is filled with adhesive.

[0021] The present invention is further configured such that the fiber layer is cut before pretreatment, and a notch is provided at the fold of the fiber layer, the notch spanning both sides of the fold; the fold of the fiber layer is immersed in the adhesive in the filling groove, and the adhesive can enter the concave side of the fold of the fiber layer from the notch.

[0022] The present invention also provides a production apparatus for fiber PTFE coated aluminum sheets, for producing fiber PTFE coated aluminum sheets as described above.

[0023] In summary, the present invention has the following beneficial effects:

[0024] By employing a composite structure of an aluminum plate layer, a fiber layer, and a PTFE layer, the fiber layer is made of glass fiber and contains several folds, each fold being formed along the width direction of the aluminum plate layer. These folds are evenly distributed along the length direction of the aluminum plate layer, thus compensating for deformation along its length. When the sheet is heated and deformed, the aluminum plate experiences greater deformation along its length, while the glass fiber itself exhibits less. The presence of folds in the fiber layer provides redundant length for the glass fibers, which can then act as an adjustment mechanism during the stretching process. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the multilayer structure of a fiber PTFE-coated aluminum plate in this embodiment;

[0026] Figure 2 This is a cross-sectional view of a fiber PTFE-coated aluminum plate in this embodiment;

[0027] Figure 3 This is a schematic cross-sectional view of the fiber layer in this embodiment;

[0028] Figure 4 This is a schematic diagram of the folds in the fiber layer in this embodiment;

[0029] Figure 5 This is a schematic diagram of a fiber layer composite mechanism in this embodiment;

[0030] Figure 6 This is a schematic diagram of another structure of the fiber layer composite mechanism in this embodiment;

[0031] Figure 7 This is a schematic diagram of a fiber layer pretreatment mechanism in this embodiment;

[0032] Figure 8 This is a schematic diagram of the structure at the fold of the fiber layer in this embodiment;

[0033] Figure 9 This is a schematic diagram of another structure of the fiber layer pretreatment mechanism in this embodiment.

[0034] Reference numerals: Aluminum plate layer 1; Adhesive layer 2; Fiber layer 3; Longitudinal fiber filament 301; Transverse fiber filament 302; Fiber core 303; Outer covering layer 304; Wrinkle 310; Concave side 311; Convex side 312; Crease 313; Notch 314; PTFE layer 4; Fiber layer composite mechanism 5; Support roller 1 501; Pressure roller 1 502; Receiving recess 503; Support roller 2 504; Pressure roller 2 505; Fiber layer pretreatment mechanism 6; Hot press mold base 610; Hot press mold groove 611; Pressing block 1 612; Glue filling mold base 620; Glue filling mold groove 621; Pressing block 2 622; Glue filling groove 623; Lifting seat 630. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] This embodiment discloses a fiber-reinforced PTFE-coated aluminum plate, referring to... Figure 1 , Figure 2 As shown, it includes an aluminum plate layer 1, an adhesive layer 2, a fiber layer 3 and a PTFE layer 4. The aluminum plate layer 1 serves as the substrate. The surface of the aluminum plate layer 1 is cleaned, pretreated, and then coated with a base coat to optimize the surface properties of the aluminum plate layer 1, which is conducive to the adhesion of the fiber layer 3.

[0037] An adhesive layer 2 is applied to the pretreated surface of the aluminum plate layer 1, and then a fiber layer 3 is laid on the surface of the adhesive layer 2. By pressing the composite multi-layer structure together, the adhesive layer 2 can bond the surface of the fiber layer 3 together. Then, a PTFE coating is applied to the surface of the fiber layer 3 to form a PTFE layer 4. The PTFE layer 4 has good stability, which enables the entire aluminum plate to have good weather resistance.

[0038] In this embodiment, fiber layer 3 is a glass fiber layer. Fiber layer 3 includes longitudinal fiber filaments 301 and transverse fiber filaments 302, which are interwoven to form a grid-like structure. During composite bonding, some of the adhesive material from bonding layer 2 will permeate through the gaps between the fibers.

[0039] A PTFE layer 4 is formed by coating the outer side of the fiber layer 3. Part of the coating material in the PTFE layer 4 can also penetrate into the gaps between the fibers of the fiber layer 3, which can increase the bonding strength between the PTFE layer 4 and the fiber layer 3. Moreover, the adhesive layer 2 and part of the PTFE layer 4 that have penetrated into the gaps between the fibers of the fiber layer 3 will come into contact with each other, thereby enabling the two to obtain a certain degree of composite strength supplementation, and thus improving the composite stability of the coating.

[0040] Fiber layer 3 is a glass fiber layer. Due to the significant difference in thermal expansion coefficients between glass fiber and aluminum (glass fiber has a relatively smaller coefficient, while aluminum has a relatively larger coefficient), in applications with large temperature differences, a significant deformation difference will occur between aluminum layer 1 and fiber layer 3. This is especially true for long, strip-shaped sheets, where the entire sheet will bend, meaning that aluminum layer 1 has poor elongation and will bulge outwards towards aluminum layer 1, causing distortion and negatively impacting the overall stability and strength of the component.

[0041] In this embodiment, the fiber layer 3 has a plurality of pleats 310, each pleat 310 being formed along the width direction of the aluminum plate layer 1. The pleats 310 are evenly distributed along the length direction of the aluminum plate layer 1, and can compensate for deformation along the length direction of the aluminum plate layer 1. After the plate is heated and deformed, the deformation of the aluminum plate in the length direction is larger, while the thermal deformation of the glass fiber itself is smaller. At this time, because the fiber layer 3 has pleats 310, the glass fibers at the pleats 310 have redundant length. During the stretching process, the pleats 310 can play an adjusting role, acting similarly to an expansion joint.

[0042] During production, the actual length of fiber layer 3 is slightly longer than that of aluminum plate layer 1. The raw material for aluminum plate layer 1 is aluminum strip coil, while the material for fiber layer 3 is fiberglass mesh. For example, to produce an aluminum plate of 1000 meters in length, the required aluminum strip length is 100 meters, while the length of the fiberglass mesh may be slightly longer, approximately 1000.2-1001.00 meters, resulting in a certain length redundancy. This redundancy can be evenly distributed throughout the entire length of the aluminum plate by the pleats 310, thus providing a deformation buffering effect during length expansion and contraction.

[0043] In addition, a certain difference in thermal expansion will also be formed between aluminum plate layer 1 and fiber layer 3 in the width direction of aluminum plate. In order to enable fiber layer 3 to achieve adaptive deformation, fiber layer 3 is further designed.

[0044] Reference Figure 3 As shown, in fiber layer 3, longitudinal fiber filaments 301 are arranged along the length direction of aluminum plate layer 1, while transverse fiber filaments 302 are arranged along the width direction of aluminum plate layer 1, forming a crisscross woven structure. Furthermore, the diameter of the longitudinal fiber filaments 301 is larger than the diameter of the transverse fiber filaments 302, and the fiber layer 3 is mainly supported by the longitudinal fiber filaments 301. From the cross-sectional direction, the longitudinal fiber filaments 301 are arranged coplanarly along fiber layer 3, and are approximately parallel and equidistant. During the weaving process, the longitudinal fiber filaments 301 almost never bend in the length direction. The transverse fiber filaments 302 have a finer diameter and are woven between the longitudinal fiber filaments 301 in an alternating up-and-down bending manner, with the transverse fiber filaments 302 in a bent state.

[0045] When the fiber layer 3 needs to undergo lengthwise stretching deformation, the pleats 310 mainly play a role in stretching and buffering. When the fiber layer 3 undergoes widthwise deformation, the curved transverse fibers 302 can generate widthwise stretching buffer. Furthermore, when the fiber layer 3 undergoes widthwise deformation, the longitudinal fibers 301, which mainly play a supporting role in the fiber layer 3, do not need to undergo lengthwise deformation. They only need to undergo a certain stretching and contraction in the widthwise arrangement, making the widthwise deformation of the fiber layer 3 smoother and more stable.

[0046] Specifically, in this embodiment, the diameter of the longitudinal fiber filament 301 is 5-10 times the diameter of the transverse fiber filament 302. The two have a large diameter difference, which allows the longitudinal fiber filament to maintain a stable longitudinal arrangement when woven into a mesh, while the transverse fiber filament only needs to ensure that it is interwoven with the longitudinal fiber filament. The transverse fiber filament mainly plays the role of roughly maintaining the longitudinal fiber filament.

[0047] In this embodiment, the longitudinal fiber filament 301 can adopt a composite coating structure, specifically including a fiber core 303 and an outer coating layer 304, wherein the fiber core 303 is glass fiber, and the outer coating layer 304 is a PTFE coating, covering the fiber core 303. By pre-coating the longitudinal fiber filament 301, the fiber filament can be more stably protected.

[0048] For the pleated portion 310, a crease 313 is formed at the pleated portion 310 of the fiber layer 3 along the width direction of the fiber layer 3. By bending the fiber layer 3 along the crease 313 and hot pressing it, the fiber layer 3 can be bent at the crease 313. The pleated portion 310 is formed by folding and hot pressing.

[0049] Reference Figure 4 As shown, a concave side 311 and a convex side 312 are formed on both sides of the wrinkled portion 310, respectively. The concave side 311 faces the aluminum plate layer 1, while the convex side 312 of the wrinkled portion 310 protrudes away from the aluminum plate layer 1. During the coating process, the PTFE layer 4 covers the fiber layer 3 and encloses the wrinkled portion 310. After the PTFE layer 4 is coated and cured, a smooth surface is formed on the outer surface of the PTFE layer 4. The wrinkles and protrusions of the wrinkled portion 310 are sandwiched between the PTFE layer 4 and the adhesive layer 2. The wrinkled state does not affect the smoothness of the aluminum plate surface; the coating effect compensates for the bulging and bending of the wrinkles.

[0050] This embodiment also discloses a production apparatus for fiber PTFE coated aluminum sheet, including an adhesive layer coating mechanism, a fiber layer composite mechanism 5, a PTFE layer 4 coating mechanism, a drying mechanism, and a fiber layer pretreatment mechanism 6;

[0051] The adhesive layer coating mechanism can coat the surface of the aluminum plate layer 1, and can pre-coat the adhesive layer 2 on the surface of the aluminum plate layer 1, and then attach the fiber layer 3 to the surface of the adhesive layer 2; the fiber layer 3 is composited by the fiber layer composite mechanism 5 during the composite bonding process.

[0052] Reference Figure 5 As shown, the fiber layer composite mechanism 5 includes a support roller 501 and a pressure roller 502. The axial positions of the pressure roller 502 and the support roller 501 are fixed to each other, and they can rotate synchronously in opposite directions. A pressing gap is formed between the support roller 501 and the pressure roller 502 to press the aluminum plate layer 1 and each layer together, which can press each layer together.

[0053] Among them, the pressure roller 502 is located directly above the support roller 501. The pressure roller 502 and the support roller 501 cooperate with each other to pressurize the fiber layer 3 onto the adhesive layer 2.

[0054] Since the fiber layer 3 has uniformly distributed pleats 310, to avoid flattening the pleats 310, several receiving recesses 503 are provided on the outer periphery of the pressure roller 502. The receiving recesses 503 correspond to the pleats 310 of the fiber layer 3. Each receiving recess 503 is arranged along the axial direction of the pressure roller 502, and the receiving recesses 503 are arranged in a ring array. In the circumferential direction, the fiber layer 3 passes around the pressure roller 502, and each pleat 310 can fall exactly into the receiving recess 503. When the receiving recess 503 passes around the side near the support roller 501, there will be no direct compression between the receiving recess 503 and the support roller 501, thereby forming a compression gap at the corresponding position of the receiving recess 503 and the pleats 310.

[0055] During the extrusion lamination process, the adhesive and other coatings applied to the surface of the aluminum plate layer 1 can be compressed and moved toward the recess 503 and the wrinkled portion 310. Some of the adhesive can be concentrated and replenished near the wrinkled portion 310, especially concentrated on the concave side 311 of the wrinkled portion 310. The adhesive concentrated on the concave side 311 can support the inside of the concave side 311, thereby enabling the wrinkled portion 310 to form a bent and wrinkled state, preventing the wrinkled portion 310 from being compressed and returning to flatness, and maintaining the buffer wrinkle length of the wrinkled portion 310.

[0056] Furthermore, referring to Figure 6 As shown, the fiber layer composite mechanism 5 also includes a second support roller 504 and a second pressure roller 505. The second support roller 504 and the second pressure roller 505 are located downstream of the first support roller 501. The second support roller 504 and the second pressure roller 505 can supplement the pressing of the fiber layer 3 and the aluminum plate layer 1.

[0057] Furthermore, the fiber layer composite mechanism 5 also includes a heat drying module located between support roller 1 501 and support roller 2 504, which can initially dry the adhesive layer 2. The heat drying module can initially heat and dry the aluminum plate layer with the fiber layer, drying it to approximately half the drying state of the adhesive layer 2, allowing the adhesive layer 2 to initially solidify and form a preliminary bond. At this point, the fiber layer 3 can be roughly bonded to the aluminum plate layer 1, and their positions can remain roughly stable. After the initial drying is completed, the composite plate of the aluminum plate layer 1 and the fiber layer 3 is further compressed by support roller 2 504 and pressure roller 2 505. This further presses the two together and, through roller pressing, compresses the height of the wrinkled portion 310, preventing the outward convex side 312 of the wrinkled portion 310 from protruding excessively. By pressing the outward convex side 312 up and down, the outward convex side 312 of the wrinkled portion 310 can be flattened, thereby reducing the height of the wrinkled protrusion at the wrinkled portion 310. In addition, since the sheet material has been pre-dried by the hot drying module, the fiber layer 3 can avoid large slippage on the surface of the aluminum plate layer 1, thus maintaining the existence of the wrinkled part 310 and maintaining the deformation buffer space of the wrinkled part 310.

[0058] Then, the PTFE layer 4 is coated on the surface of the fiber layer 3 by the PTFE layer 4 coating mechanism to form the PTFE layer 4. Then, the aluminum plate is dried and cured by the drying mechanism so that the bonding layer 2 and the PTFE layer 4 can be fused and cured, thereby forming a bendable composite fiber aluminum plate.

[0059] Reference Figures 7-9 As shown, in this embodiment, the wrinkled portion 310 of the fiber layer 3 is pre-processed by the fiber layer pre-processing mechanism 6.

[0060] Reference Figure 7 As shown, the fiber layer pretreatment mechanism 6 includes a hot press mold base 610, a lifting base 630, and a pressing block 612. A hot press mold groove 611 is provided on the upper side of the hot press mold base 610. The hot press mold groove 611 has an inverted triangular structure that is wider at the top and narrower at the bottom, which can form a bottom support during the hot pressing process.

[0061] The lifting seat 630 is located on the upper side of the hot press mold base 610 and can be adjusted up and down by a lifting driver. The pressing block 612 is installed on the lifting seat 630. The pressing block 612 is vertically opposite to the hot press mold groove 611. The lower side of the pressing block 612 forms a structure that is wider at the top and narrower at the bottom, and the shape of the lower side of the pressing block 612 is adapted to the hot press mold groove 611. During the pressing process, the lower part of the pressing block 612 can press the fiber layer 3 into the hot press mold groove 611, and can press it into the hot press mold groove 611 to form a pleated part 310.

[0062] Furthermore, a heater is provided inside the hot press mold base 610 to heat the hot press mold base 610, so that the hot press mold groove 611 is in a heated state. The fiber layer 3 is pressed into the hot press mold groove 611 by the pressure block 612, so that hot pressing can be achieved in the hot press mold groove 611, thereby initially hot pressing and shaping the wrinkled part 310, and thus initially forming the crease effect of the wrinkled part 310.

[0063] Furthermore, referring to Figure 8 As shown, the fiber layer 3 is cut before pretreatment. A notch 304 is provided at the fold 310 of the fiber layer 3, and the notch 304 spans both sides of the fold 313. The notch 304 allows adhesive or other coatings to partially pass through, so that the coating can enter the concave side 311 of the fold 310 through the notch 304, thereby forming support in the concave side 311 and forming pre-support in the concave side 311, which is beneficial for the subsequent formation of the fold 310.

[0064] Furthermore, referring to Figure 9 As shown, the fiber layer pretreatment mechanism 6 also includes a glue-applying mold base 620, which is located downstream of the hot press mold base 610. The fiber layer 3 is first hot-pressed by the hot press mold base 610 to form creases, and then glue-applying treatment is performed at the position of the crease 313 by the glue-applying mold base 620.

[0065] Specifically, a glue-applying mold groove 621 is provided on the upper side of the glue-applying mold base 620. The shape of the glue-applying mold groove 621 is roughly larger at the top and smaller at the bottom. A pressure block 622 is provided directly above the glue-applying mold groove 621. The pressure block 622 is fixedly installed on the lifting base 630. The pressure block 622 can move up and down with the lifting base 630, so that the pressure block 612 and the pressure block 622 can move up and down synchronously for molding.

[0066] The pressure block 622 can squeeze the creases 313 of the fiber layer 3 into the glue filling mold groove 621. In addition, a glue filling groove 623 is provided in the middle of the inner side of the glue filling groove 623. The glue filling groove 623 can form a relief cavity on the inner wall of the glue filling mold groove 621, and then the glue filling groove 623 can be filled with adhesive.

[0067] When the second pressing block 622 presses the crease 313 of the fiber layer 3 into the adhesive filling groove 623, the wrinkled portion 310 of the fiber layer 3 is immersed in the adhesive in the adhesive filling groove 623. The adhesive can enter the concave side 311 of the wrinkled portion 310 of the fiber layer 3 through the notch 304. At the crease, the adhesive can be pre-replenished on the inside of the crease 313, and then preliminary drying and curing are performed. On the one hand, the crease 313 can be initially shaped by the adhesive and hot pressing, and on the other hand, the adhesive can be replenished on the inside of the crease 313, which is conducive to maintaining the wrinkled effect of the wrinkled portion 310 in the subsequent lamination process.

[0068] The above description is merely a preferred embodiment of the present invention. The scope of protection of the present invention is not limited to the above embodiments. All technical solutions falling within the scope of the present invention's concept are within the scope of protection of the present invention. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principles of the present invention should also be considered within the scope of protection of the present invention.

Claims

1. A fiber-reinforced PTFE-coated aluminum sheet, characterized in that, The material includes an aluminum plate layer (1), an adhesive layer (2), a fiber layer (3), and a PTFE layer (4). The aluminum plate layer (1) and the fiber layer (3) are bonded together by the adhesive layer (2). The PTFE layer (4) covers the side of the fiber layer (3) facing away from the aluminum plate layer (1). The fiber layer (3) has a plurality of pleats (310), each pleat (310) being formed along the width direction of the aluminum plate layer (1). The pleats (310) are evenly distributed along the length direction of the aluminum plate layer (1). The fiber layer (3) is a glass fiber layer, and the pleats (310) form a buffer for the fiber layer (3) to stretch and deform. The fiber layer (3) includes longitudinal fiber filaments (301) and transverse fiber filaments (302), which are interwoven with each other; the longitudinal fiber filaments (301) are arranged along the length direction of the aluminum plate layer (1), and the transverse fiber filaments (302) are arranged along the width direction of the aluminum plate layer (1). The diameter of the longitudinal fiber filament (301) is larger than the diameter of the transverse fiber filament (302); from the cross-sectional direction, the longitudinal fiber filament (301) is arranged coplanarly along the fiber layer (3), and the transverse fiber filament (302) is alternately bent and woven between the longitudinal fiber filament (301); The longitudinal fiber filament (301) includes a fiber core (303) and an outer covering layer (304), wherein the outer covering layer (304) is a PTFE coating and covers the fiber core (303); the diameter of the longitudinal fiber filament (301) is 5-10 times the diameter of the transverse fiber filament (302); The pleated portion (310) of the fiber layer (3) has creases (313) along the width direction of the fiber layer (3); the creases (313) are formed by folding and hot pressing the fiber layer (3); The pleated portion (310) has an inner concave side (311) and an outer convex side (312) formed on its front and back sides, respectively, with the inner concave side (311) facing the aluminum plate layer (1).

2. The fiber-coated PTFE aluminum sheet according to claim 1, characterized in that, The outer convex side (312) of the pleated portion (310) protrudes in the direction away from the aluminum plate layer (1), and the PTFE layer (4) covers the fiber layer (3) and covers the pleated portion (310) inside.

3. The fiber-coated PTFE aluminum plate according to claim 1, characterized in that, The fiber layer (3) is composited through the fiber layer composite mechanism (5) during the composite bonding process; The surface of the aluminum plate layer (1) is pre-coated with an adhesive layer (2), and then the fiber layer (3) is bonded to the surface of the adhesive layer (2); the fiber layer composite mechanism (5) includes a support roller (501) and a pressure roller (502), the pressure roller (502) is located directly above the support roller (501), and the pressure roller (502) and the support roller (501) cooperate with each other to press the fiber layer (3) onto the adhesive layer (2); The outer periphery of the pressure roller (502) is provided with a plurality of receiving recesses (503), the receiving recesses (503) correspond to the pleats (310) of the fiber layer (3), each receiving recess (503) is arranged along the axial direction of the pressure roller (502), and each receiving recess (503) is arranged in a ring array.

4. The fiber-coated PTFE aluminum plate according to claim 1, characterized in that, The pleated portion (310) of the fiber layer (3) is pre-processed by the fiber layer pre-processing mechanism (6). The fiber layer pre-processing mechanism (6) includes a hot press mold base (610), a lifting base (630), and a pressing block (612). A hot press mold groove (611) is provided on the upper side of the hot press mold base (610). The lifting base (630) is located on the upper side of the hot press mold base (610) and can be adjusted up and down. The pressing block (612) is installed on the lifting base (630). The pressing block (612) is vertically opposite to the hot press mold groove (611) and is used to press and form the pleated portion (310) in the hot press mold groove (611).

5. The fiber-coated PTFE aluminum plate according to claim 4, characterized in that, The fiber layer pretreatment mechanism (6) further includes a glue-applying mold base (620), which is located downstream of the hot press mold base (610). A glue-applying mold groove (621) is provided on the upper side of the glue-applying mold base (620). A pressure block two (622) is provided directly above the glue-applying mold groove (621). The pressure block two (622) is installed on the lifting base (630) and can move up and down with the lifting base (630). A glue-applying groove (623) is provided in the middle of the inner side of the glue-applying mold groove (621). The glue-applying groove (623) is filled with adhesive. The fiber layer (3) is cut before pretreatment. A notch (314) is provided at the fold (310) of the fiber layer (3), and the notch (314) spans both sides of the crease (313). The fold (310) of the fiber layer (3) is immersed in the adhesive in the glue filling groove (623), and the adhesive can enter the concave side (311) of the fold (310) of the fiber layer (3) from the notch (314).

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