Multifunctional processing device for polyester-coated aluminum coil and preparation method thereof

Abstract

This invention relates to the field of aluminum coil processing and cutting technology, specifically to a multifunctional processing device and preparation method for polyester-coated aluminum coils. A fixed crossbeam is provided at the lower end of the cutting frame. Three sets of linearly distributed adjusting rods are elastically installed on the fixed crossbeam. An upper support is provided at the upper end of each adjusting rod. Rotary rollers are rotatably mounted on bearings on both sides of the upper end of the upper support. The outer diameter of the rotary rollers is smaller than the width of the groove on one side of the parallel double grooves. The beneficial effects are: by pressing parallel double grooves into the aluminum coil, the spaced double grooves achieve misalignment with the upper surface of the aluminum coil, thus avoiding continuous high-temperature damage to the coating during laser cutting. Simultaneously, the parallel double grooves, in conjunction with the elastically installed rotary rollers, enable precise positioning of the cutting position, thereby achieving precise and rapid laser cutting of coated aluminum coils.

Description

Technical Field

[0001] This invention relates to the field of aluminum coil processing and cutting technology, specifically to a multifunctional processing device and preparation method for polyester-coated aluminum coils. Background Technology

[0002] Color-coated aluminum coils are widely used in building curtain walls, advertising signage, and interior and exterior decoration due to their lightweight, weather resistance, and excellent decorative properties. Traditional color-coated aluminum coil surface coatings often employ highly cross-linked saturated polyester / amino resin systems to achieve high hardness, excellent weather resistance, and chemical resistance. However, this highly cross-linked coating often has low surface energy and a dense, hard film, making it difficult for UV inks to effectively wet, penetrate, and adhere during subsequent UV printing. This often results in poor adhesion and easy pattern peeling, severely limiting its application in markets requiring personalized, small-batch, and rapid pattern customization (such as advertising and personalized decoration).

[0003] To improve printing quality, a common improvement method in the existing technology is to coat the surface of the aluminum coil to be printed with a layer of polyester coating. The more compatible polyester leveling agent ensures that the cured coating surface has high surface tension, providing an excellent wetting and spreading base for UV inks, meeting the appearance requirements, and avoiding the negative impact of excessive slipperiness caused by low gloss on adhesion.

[0004] However, in actual processing, after the polyester coating is applied, it needs to be baked in an oven for 1-2 minutes. In production lines, aluminum coils need to move continuously to ensure continuous processing, so the aluminum coils need to be cut. The cut aluminum coils are then stacked at intervals and put into the oven. However, because of the coating on its surface, the high temperature of laser sintering during laser cutting will damage the coating. At high temperatures, the organic polyester coating is flammable and will continue to deteriorate. At the same time, it is difficult to accurately control the cutting position during the conveying process. Summary of the Invention

[0005] The purpose of this invention is to provide a multifunctional processing apparatus and preparation method for polyester-coated aluminum coils, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A multifunctional processing device for polyester-coated aluminum coils includes a conveyor frame on which leveled aluminum coils are placed and conveyed. Above the conveyor frame are arranged sequentially a coating roller for applying a polyester coating, a grooving frame for pressing parallel double grooves on the upper and lower surfaces of the aluminum coil, and a cutting frame for laser cutting the parallel double grooves. The grooving frame is equipped with an upper grooving knife and a lower grooving knife, which are driven by a first lifting rod and are symmetrically distributed vertically. The parallel double grooves are configured as a pair of spaced and parallel slots. The upper end of the cutting frame is equipped with a slider driven by a transverse driving rod. The lower end of the slider is equipped with a laser cutting assembly driven by a second lifting rod. The lower end of the laser cutting assembly faces the upper surface of the aluminum coil. The lower end of the cutting frame is equipped with a fixed crossbeam. Three sets of linearly distributed adjusting rods are elastically installed on the fixed crossbeam. The upper end of the adjusting rods is equipped with an upper support. Rotary rollers are rotatably mounted on the two side walls of the upper end of the upper support using bearings. The outer diameter of the rotating rollers is smaller than the width of the groove on one side of the parallel double groove.

[0007] Preferably, the upper end of the coating roller is connected to a cylinder loaded with polyester coating, the coating roller is driven by a motor, and the lower end of the coating roller is pressed against the upper surface of the aluminum coil.

[0008] Preferably, the upper pressing knife is fixed to the telescopic end of the first lifting rod, and a U-shaped tube located below the aluminum coil is fixedly installed on the pressing frame. The two ends of the U-shaped tube are set as lifting slides, and piston rods are vertically inserted into the inner cavity of the lifting slides at both ends. A sealing cover is provided at the port of the lifting slide. The upper end of the piston rod on one side of the lifting slide slide slide slides through the sealing cover and connects to the lower pressing knife, while the piston rod on the other side of the lifting slide slide slide is connected to the first lifting rod.

[0009] Preferably, the upper and lower pressing cutters are provided with an inwardly recessed groove in the middle, and pressing strips are provided on both sides of the upper and lower pressing cutters, with the ends of the pressing strips being inclined surfaces that slope towards the inward groove.

[0010] Preferably, the outer wall of the middle section of the adjusting rod is provided with side strips arranged in a circumferential array, and the fixed crossbeam is provided with through holes that cooperate with the adjusting rod and the side strips. The adjusting rod and the side strips are slidably inserted into the through holes. The lower end of the adjusting rod is provided with a base plate, and a spring is sleeved on the adjusting rod. The spring is pressed between the upper bracket and the upper end face of the fixed crossbeam.

[0011] Preferably, the cutting frame is provided with height limiting rollers on both sides located at the upper end of the aluminum coil, the height limiting rollers are pressed against the upper end surface of the aluminum coil, and the lower end of the fixed crossbeam is provided with an adjustable pneumatic telescopic component, the end of the pneumatic telescopic component is pressed against the base plate.

[0012] Preferably, the upper end of the cutting frame is provided with a guide rail, the slider slides along the guide rail, and a transverse drive rod for driving the slider to slide along the guide rail is provided on one side of the cutting frame. The inner cavity of the fixed crossbeam is provided with a compression inner cavity that connects multiple sets of pneumatic telescopic components. The end of the compression inner cavity is connected to an upwardly extending connecting pipe. The end of the connecting pipe extends to a position equal to the height of the slider, and the end of the connecting pipe is connected to an air bladder. A pressure rod is provided on the side of the slider facing the air bladder.

[0013] Preferably, the fixed crossbeam is provided with an upwardly extending limiting frame at one end near the airbag. A gap is left between the upper end face of the limiting frame and the lower end face of the aluminum coil, and the height of the gap is greater than the height of the upper support. A hinge seat is provided at the lower end of the upper support, and the upper end of the adjusting rod is rotatably mounted on the hinge seat.

[0014] Preferably, the end of the second lifting rod is connected to a protective frame, and both sides of the protective frame are configured as thin plates that can be inserted into the slots on both sides of the parallel double slots. The laser cutting component is disposed between a pair of thin plates, and the thickness of the thin plates is less than the width of the slots.

[0015] A preparation method based on the multifunctional processing apparatus for polyester-coated aluminum coils, the preparation method comprising the following steps: Step 1: Apply the formulated functional polyester coating evenly to the upper surface of the aluminum coil using a coating roller. Step 2: Using the upper and lower grooving blades on the grooving frame to press against each other, parallel double grooves are formed on both the upper and lower end faces of the aluminum coil. Step 3: Under the conveyor, the parallel double grooves on the aluminum coil move to the cutting frame. Due to the elastic installation of the upper support, a pair of rollers are engaged in the parallel double grooves under the action of the reset spring force, forming accurate positioning. Step 4: Using the cooperation of the horizontal drive rod and the second lifting rod, the laser cutting component is moved to cut the aluminum coil into sheets. Multiple sheets of aluminum coil are stacked at intervals and then sent into the oven for baking and shaping.

[0016] Compared with the prior art, the beneficial effects of the present invention are: This invention presses parallel double grooves into an aluminum coil, thereby creating a misalignment between the grooves and the upper surface of the aluminum coil. This avoids continuous high-temperature damage to the coating during laser cutting. At the same time, the parallel double grooves, in conjunction with a flexibly mounted roller, enable precise positioning of the cutting position, thus achieving accurate and rapid laser cutting of coated aluminum coils. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 for Figure 1Enlarged view of the B-structure; Figure 3 for Figure 1 Enlarged view of the structure at point A in the middle; Figure 4 This is a three-dimensional structural diagram of the upper support of the present invention; Figure 5 This is a three-dimensional structural diagram of the upper support of the present invention being elastically installed on a fixed crossbeam; Figure 6 This is a three-dimensional structural diagram of the slider mounted on the slide rail according to the present invention; Figure 7 This is a schematic diagram of the three-dimensional structure of the cutting frame of the present invention; Figure 8 This is a three-dimensional structural diagram of the laser cutting assembly of the present invention.

[0018] In the diagram: 1. Conveyor frame; 2. Aluminum coil; 3. Coating roller; 4. Material cylinder; 5. Grooving frame; 6. Cutting frame; 7. Guide rail; 8. Height limiting roller; 9. First lifting rod; 10. Upper grooving knife; 11. Lower grooving knife; 12. Inner groove; 13. Pressure strip; 14. U-shaped tube; 15. Lifting slide; 16. Sealing cover; 17. Piston rod; 18. Slider; 19. Lateral drive rod; 20. Second lifting rod; 21. Laser cutting assembly; 22. Protective frame; 23. Parallel double groove; 24. Adjusting rod; 25. Upper bracket; 26. Fixed crossbeam; 27. Compression cavity; 28. Spring; 29. ​​Rotating roller; 30. Pneumatic telescopic component; 31. Side strip; 32. Through hole; 33. Base plate; 34. Pressure rod; 35. Connecting pipe; 36. Airbag; 37. Hinge seat; 38. Limiting frame. Detailed Implementation

[0019] 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.

[0020] Please see Figures 1 to 8 The present invention provides a technical solution: Example 1: A multifunctional processing device for polyester-coated aluminum coils includes a conveyor frame 1, on which a leveled aluminum coil 2 is placed and conveyed. Above the conveyor frame 1, there are sequentially arranged a coating roller 3 for coating with polyester, a grooving frame 5 for pressing parallel double grooves 23 on the upper and lower surfaces of the aluminum coil 2, and a cutting frame 6 for laser cutting the parallel double grooves 23. The upper end of the coating roller 3 is connected to a material cylinder 4 loaded with polyester coating. The coating roller 3 is driven by a motor, and the lower end of the coating roller 3 is pressed against the upper surface of the aluminum coil 2.

[0021] A layer of polyester coating is applied to the upper end face of the aluminum coil 2 by the coating roller 3. Parallel double grooves 23 are pressed out on the upper and lower end faces of the coated aluminum coil 2 by the grooving frame 5. The aluminum coil 2 is precisely cut at the position of the parallel double grooves 23 by the cutting frame 6.

[0022] The grooving frame 5 is equipped with an upper grooving knife 10 and a lower grooving knife 11, which are driven by the first lifting rod 9 and are symmetrically distributed vertically. The upper grooving knife 10 is fixed to the telescopic end of the first lifting rod 9. A U-shaped tube 14 located below the aluminum coil 2 is fixedly installed on the grooving frame 5. The two ends of the U-shaped tube 14 are set as lifting slides 15. A piston rod 17 is vertically inserted into the inner cavity of the lifting slide 15 at both ends. A sealing cover 16 is provided at the port of the lifting slide 15. The upper end of the piston rod 17 on one side of the lifting slide 15 slides through the sealing cover 16 and connects to the lower grooving knife 11. The piston rod 17 on the other side of the lifting slide 15 is connected to the first lifting rod 9.

[0023] By setting up the cooperation between the U-shaped tube 14 and the piston rod 17, when the first lifting rod 9 drives the upper pressing knife 10 to descend, it squeezes one side of the inner cavity of the U-shaped tube 14, thereby increasing its internal pressure and driving the piston rod 17 on the other side to rise, which in turn drives the lower pressing knife 11 to rise, realizing the relative compression of the upper pressing knife 10 and the lower pressing knife 11, thereby pressing out parallel double grooves 23 on the upper and lower end faces of the aluminum coil 2.

[0024] An inwardly recessed groove 12 is provided between the upper groove cutter 10 and the lower groove cutter 11. A pressure strip 13 is provided on both sides of the upper groove cutter 10 and the lower groove cutter 11. The end of the pressure strip 13 is set as an inclined surface that slopes towards the inward groove 12. The parallel double groove 23 is set as a pair of spaced and parallel slots.

[0025] By setting the bevel at the end of the pressure strip 13, a lateral extrusion is formed on the aluminum coil 2, causing the grooves pressed out by the pressure strip 13 on both sides of the aluminum coil 2 to deform towards the middle. The deformed position protrudes into the inner groove 12, so that the deformed position is concentrated towards the position to be cut later, reducing damage to the aluminum coil 2. By using a pair of parallel grooves pressed out, the cutting position is made to be vertically misaligned with the upper end face of the aluminum coil 2, actively destroying the polyester coating at the cutting position, thereby avoiding continuous high-temperature burning during laser high-temperature cutting.

[0026] The upper end of the cutting frame 6 is provided with a slider 18 driven by a transverse drive rod 19. The lower end of the slider 18 is provided with a laser cutting assembly 21 driven by a second lifting rod 20. The lower end of the laser cutting assembly 21 is directly opposite the upper end face of the aluminum coil 2. The lower end of the cutting frame 6 is provided with a fixed crossbeam 26. Three sets of linearly distributed adjusting rods 24 are elastically installed on the fixed crossbeam 26. The upper end of the adjusting rods 24 is provided with an upper bracket 25. The upper end of the upper bracket 25 has rotating rollers 29 rotatably installed on the side walls of both sides. The outer diameter of the rotating rollers 29 is smaller than the groove width on one side of the parallel double groove 23.

[0027] By setting up an elastically vertically installed upper bracket 25, when one side of the slot contacts the rotating roller 19, the rotating roller 19 will be driven by the conveyor frame 1 to pass over the protrusion in the middle of the pair of slots. After passing over, the pair of rotating rollers 19 are facing the pair of slots. Under the reset spring force, the rotating roller 19 is inserted into the slot, forming a snap-fit ​​positioning of the aluminum coil 2. After positioning, the laser cutting assembly 21 is driven to descend by the second lifting rod 20, so that it is facing the middle position of the pair of slots. The longitudinal sliding of the laser cutting assembly 21 is realized by the transverse driving rod 19, thereby cutting the aluminum coil 2.

[0028] Example 2: In the integration of Example 1, the outer wall of the middle section of the adjusting rod 24 is provided with side strips 31 arranged in a circular array. The fixed crossbeam 26 is provided with through holes 32 that cooperate with the adjusting rod 24 and the side strips 31. The adjusting rod 24 and the side strips 31 are slidably inserted into the through holes 32. The lower end of the adjusting rod 24 is provided with a base plate 33. A spring 28 is sleeved on the adjusting rod 24. The spring 28 is pressed between the upper bracket 25 and the upper end face of the fixed crossbeam 26.

[0029] The spring 28 is used to achieve the elastic installation of the adjusting rod 24. The side strip 31 and the through hole 32 are used to achieve the vertical limiting installation of the adjusting rod 24, so as to avoid the lateral displacement of the adjusting rod 24 causing the roller 19 to be unable to pass the middle protrusion of a pair of slots.

[0030] The cutting frame 6 is provided with height limiting rollers 8 on both sides of the upper end of the aluminum coil 2. The height limiting rollers 8 are pressed against the upper end surface of the aluminum coil 2. The lower end of the fixed crossbeam 26 is provided with an adjustable pneumatic telescopic component 30. The end of the pneumatic telescopic component 30 is pressed against the base plate 33.

[0031] The height of the aluminum coil 2 is limited by the height limiting roller 8, so that the aluminum coil 2 is pressed onto the rotating roller 19. The pressure of the aluminum coil 2 itself causes the spring 28 at the lower end of the rotating roller 19 to be in a compressed state, so that it can be reset and popped out when it is aligned with the slot.

[0032] Example 3: Based on Example 2, in order to improve the continuity of the cutting and realize the processing of waste material after cutting, this application also provides a guide rail 7 at the upper end of the cutting frame 6, and the slider 18 slides along the guide rail 7. A transverse drive rod 19 for driving the slider 18 to slide along the guide rail 7 is provided on one side of the cutting frame 6. A compression cavity 27 connected to multiple sets of pneumatic telescopic components 30 is provided in the inner cavity of the fixed beam 26. The end of the compression cavity 27 is connected to an upwardly extending connecting pipe 35. The end of the connecting pipe 35 extends to the same height as the slider 18, and the end of the connecting pipe 35 is connected to an air bag 36. A pressure rod 34 is provided on the side of the slider 18 facing the air bag 36.

[0033] The guide rail 7 and the slider 18 work together to achieve the limiting sliding of the laser cutting component 21, thereby improving the cutting accuracy. By setting the pressure rod 34 and the air bag 36 to work together, after the cutting is completed, the slider 18 continues to slide, causing the pressure rod 34 to squeeze the air bag 36. The air bag 36 deforms, increasing the pressure inside the compression cavity 27, which drives the pneumatic telescopic rod 30 to extend. This causes the adjusting rod 24 and the upper support 25 to descend, allowing the roller 19 to leave the slot and release the clamping and positioning of the aluminum coil 2, so that it can be produced in a continuous flow under the drive of the conveyor frame 1.

[0034] A limiting frame 38 extending upward is provided at one end of the fixed crossbeam 26 near the airbag 36. A gap is left between the upper end face of the limiting frame 38 and the lower end face of the aluminum coil 2. The height of the gap is greater than the height of the upper bracket 25. A hinge seat 37 is provided at the lower end of the upper bracket 25. The upper end of the adjusting rod 24 is rotatably mounted on the hinge seat 37. A protective frame 22 is connected to the end of the second lifting rod 20. Both sides of the protective frame 22 are set as thin plates that can be inserted into the slots on both sides of the parallel double groove 23. The laser cutting component 21 is set between a pair of thin plates. The thickness of the thin plate is less than the width of the slot.

[0035] The adjustment rod 24 and the upper support 25 are rotated and installed by setting the hinge seat 37. The height of one end of the upper support 25 is limited by the limit frame 38. The adjustment rod 24 and the upper support 25 move downward under the drive of the pneumatic telescopic rod 30. When the rotating roller 19 separates from the slot, one end of the upper support 25 is pressed against the limit frame 38, which limits the height of one end. The other end continues to descend under the pneumatic action, so that the upper support 25 is tilted. This makes it easier for the waste material remaining between the upper supports 25 after cutting to slide out along the inclined surface, realizing automatic waste cleaning and facilitating subsequent continuous cutting.

[0036] A preparation method based on the above-mentioned multifunctional processing apparatus for polyester-coated aluminum coils, the preparation method comprising the following steps: Step 1: Apply the specified functional polyester coating evenly to the upper surface of the aluminum coil 2 using the coating roller 3. Step 2: Using the upper grooving knife 10 and the lower grooving knife 11 on the grooving frame 5 to press against each other, parallel double grooves 23 are formed on both the upper and lower end faces of the aluminum coil 2. Step 3: Under the conveyor 1, the parallel double grooves 23 on the aluminum coil 2 move to the cutting frame 6. Due to the elastic installation of the upper bracket 25, a pair of rollers 29 are engaged in the parallel double grooves 23 under the action of the reset spring force, forming accurate positioning. Step 4: Using the cooperation of the horizontal drive rod 19 and the second lifting rod 20, the laser cutting component 21 is moved to cut the aluminum coil 2 into sheets. Multiple sets of sheet aluminum coils 2 are stacked at intervals and sent into the oven for baking and shaping.

[0037] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A multifunctional processing device for polyester-coated aluminum coils, comprising a conveyor frame (1), on which a leveled aluminum coil (2) is placed and conveyed, and above the conveyor frame (1) are arranged a coating roller (3) for applying a polyester coating, a grooving frame (5) for pressing parallel double grooves (23) on the upper and lower surfaces of the aluminum coil (2), and a cutting frame (6) for laser cutting the parallel double grooves (23), characterized in that: The grooving frame (5) is provided with an upper grooving knife (10) and a lower grooving knife (11) that are driven by a first lifting rod (9) and are symmetrically distributed. The parallel double grooves (23) are configured as a pair of spaced and parallel slots. The upper end of the cutting frame (6) is provided with a slider (18) driven by a transverse driving rod (19). The lower end of the slider (18) is provided with a laser cutting assembly (21) that is driven by a second lifting rod (20). The lower end of the laser cutting assembly (21) is directly opposite the upper end face of the aluminum coil (2). The lower end of the cutting frame (6) is provided with a fixed crossbeam (26). Three sets of linearly distributed adjusting rods (24) are elastically installed on the fixed crossbeam (26). The upper end of the adjusting rods (24) is provided with an upper bracket (25). The upper side walls of the upper end of the upper bracket (25) are rotatably mounted with rollers (29) on bearings. The outer diameter of the rollers (29) is smaller than the groove width on one side of the parallel double grooves (23).

2. The multifunctional processing device for polyester-coated aluminum coils according to claim 1, characterized in that: The upper end of the coating roller (3) is connected to the material cylinder (4) loaded with polyester coating. The coating roller (3) is driven by a motor, and the lower end of the coating roller (3) is pressed against the upper surface of the aluminum coil (2).

3. The multifunctional processing device for polyester-coated aluminum coils according to claim 1, characterized in that: The upper grooving knife (10) is fixed at the telescopic end of the first lifting rod (9). A U-shaped tube (14) located below the aluminum coil (2) is fixed on the grooving frame (5). The two ends of the U-shaped tube (14) are set as lifting slides (15). A piston rod (17) is vertically inserted into the inner cavity of the lifting slides (15) at both ends. A sealing cover (16) is set at the port of the lifting slide (15). The upper end of the piston rod (17) on one side of the lifting slide (15) slides through the sealing cover (16) and connects to the lower grooving knife (11). The piston rod (17) on the other side of the lifting slide (15) is connected to the first lifting rod (9).

4. The multifunctional processing device for polyester-coated aluminum coils according to claim 3, characterized in that: The upper grooving knife (10) and the lower grooving knife (11) are provided with an inwardly recessed groove (12), and pressure strips (13) are provided on both sides of the upper grooving knife (10) and the lower grooving knife (11). The end of the pressure strip (13) is provided as an inclined surface that slopes towards the inward groove (12).

5. The multifunctional processing device for polyester-coated aluminum coils according to claim 1, characterized in that: The middle section of the adjusting rod (24) is provided with side strips (31) arranged in a circular array on its outer wall. The fixed crossbeam (26) is provided with through holes (32) that cooperate with the adjusting rod (24) and the side strips (31). The adjusting rod (24) and the side strips (31) are slidably inserted into the through holes (32). The lower end of the adjusting rod (24) is provided with a base plate (33). A spring (28) is sleeved on the adjusting rod (24). The spring (28) is pressed between the upper bracket (25) and the upper end face of the fixed crossbeam (26).

6. The multifunctional processing device for polyester-coated aluminum coils according to claim 5, characterized in that: The cutting frame (6) is provided with height limiting rollers (8) located on the upper end of the aluminum coil (2) on both sides. The height limiting rollers (8) are pressed against the upper end surface of the aluminum coil (2). The lower end of the fixed crossbeam (26) is provided with an adjustable pneumatic telescopic component (30). The end of the pneumatic telescopic component (30) is pressed against the base plate (33).

7. The multifunctional processing device for polyester-coated aluminum coils according to claim 6, characterized in that: The upper end of the cutting frame (6) is provided with a guide rail (7), and the slider (18) slides along the guide rail (7). A transverse drive rod (19) for driving the slider (18) to slide along the guide rail (7) is provided on one side of the cutting frame (6). A compression cavity (27) connected to multiple sets of pneumatic telescopic components (30) is provided in the inner cavity of the fixed beam (26). The end of the compression cavity (27) is connected to an upwardly extending connecting pipe (35). The end of the connecting pipe (35) extends to the same height as the slider (18), and the end of the connecting pipe (35) is connected to an airbag (36). A pressure rod (34) is provided on the side of the slider (18) facing the airbag (36).

8. The multifunctional processing device for polyester-coated aluminum coils according to claim 7, characterized in that: The fixed crossbeam (26) is provided with an upwardly extending limiting frame (38) at one end near the airbag (36). There is a gap between the upper end face of the limiting frame (38) and the lower end face of the aluminum coil (2). The height of the gap is greater than the height of the upper support (25). The lower end of the upper support (25) is provided with a hinge seat (37). The upper end of the adjusting rod (24) is rotatably mounted on the hinge seat (37).

9. The multifunctional processing device for polyester-coated aluminum coils according to claim 1, characterized in that: The end of the second lifting rod (20) is connected to a protective frame (22). Both sides of the protective frame (22) are configured as thin plates that can be inserted into the slots on both sides of the parallel double groove (23). The laser cutting component (21) is disposed between a pair of thin plates, and the thickness of the thin plates is less than the width of the slots.

10. A method for preparing a polyester-coated aluminum coil using a multifunctional processing apparatus according to any one of claims 1-9, characterized in that: The preparation method includes the following steps: Step 1: Apply the specified functional polyester coating evenly to the upper surface of the aluminum coil (2) using a coating roller (3); Step 2: Using the upper grooving knife (10) and lower grooving knife (11) on the grooving frame (5) to press against each other, parallel double grooves (23) are formed on both the upper and lower end faces of the aluminum coil (2). Step 3: Under the conveyor (1), the parallel double groove (23) on the aluminum coil (2) moves to the cutting frame (6). Due to the elastic installation of the upper support (25), a pair of rollers (29) are engaged in the parallel double groove (23) under the action of the reset elastic force, forming accurate positioning. Step 4: Using the cooperation of the horizontal drive rod (19) and the second lifting rod (20), the laser cutting component (21) is moved to cut the aluminum coil (2) into sheets. Multiple sheets of aluminum coil (2) are stacked at intervals and sent into the oven for baking and shaping.

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