Hot film pasting equipment capable of automatically aligning edges of plates

Abstract

The invention relates to the technical field of plate film pasting equipment, and discloses hot film pasting equipment for automatic edge alignment of plates. The hot film pasting equipment comprises a film releasing mechanism, a film scratching mechanism, a vacuum roller mechanism, a film unfolding mechanism, a detection mechanism, a film pasting mechanism, a rack and a controller. The film releasing mechanism, the film scratching mechanism, the vacuum roller mechanism, the film spreading mechanism, the detection mechanism and the film pasting mechanism are all installed on the machine frame, the film releasing mechanism is provided with a film, the film sequentially passes through the film scratching mechanism, the vacuum roller mechanism and the film spreading mechanism to be connected with the film pasting mechanism, and the detection mechanism is connected with the film pasting mechanism. The detection mechanism is located at the discharging end of the film pasting mechanism, and the film releasing mechanism, the film scratching mechanism, the vacuum roller mechanism, the film expanding mechanism, the detection mechanism and the film pasting mechanism are all connected with the controller. According to the invention, high-precision lamination of the plate and the film can be realized, waste of the film is reduced, and the whole process is wrinkle-proof.

Description

Technical Field

[0001] The present invention relates to the technical field of sheet laminating equipment, and in particular, to a thermal laminating equipment for automatic edge alignment of sheets. Background Art

[0002] Coated sheet laminating is a process of covering a protective film on the surface of coated metal sheets (such as galvanized sheets, aluminum sheets, etc.). The core purpose is to prevent the surface of the sheets from being scratched or corroded during transportation, storage, and processing.

[0003] In the process of laminating a protective film on the surface of sheets (such as coated sheets), the traditional laminating equipment has the following significant defects: 1. Low film width matching accuracy: The film feeding mechanism cannot dynamically follow the change in the length of the sheet. The length of the film needs to be preset and longer than the sheet (margin > 20 mm), and a secondary trimming process is required, resulting in a film waste rate as high as 15% - 20%. 2. Large edge positioning deviation: It relies on manual visual inspection or fixed sensors to adjust the edge, and cannot respond in real time to the deviation of the sheet (deviation > 2 mm), resulting in misalignment, edge exposure, or wrinkles in the film coverage. 3. Poor coordination of functional modules: The flattening, trimming, and laminating mechanisms are independently adjusted with a lag response, affecting the flatness of lamination (wrinkle rate > 10%). Summary of the Invention

[0004] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, and provide a thermal laminating equipment for automatic edge alignment of sheets.

[0005] The purpose of the present invention is achieved by the following technical solutions: A thermal laminating equipment for automatic edge alignment of sheets includes a film feeding mechanism, a film scribing mechanism, a vacuum roller mechanism, a film spreading mechanism, a detection mechanism, a laminating mechanism, a frame, and a controller. The film feeding mechanism, the film scribing mechanism, the vacuum roller mechanism, the film spreading mechanism, the detection mechanism, and the laminating mechanism are all installed on the frame. The film feeding mechanism is provided with a film, and the film sequentially passes through the film scribing mechanism, the vacuum roller mechanism, the film spreading mechanism and is connected to the laminating mechanism. The detection mechanism is located at the discharge end of the laminating mechanism. The film feeding mechanism, the film scribing mechanism, the vacuum roller mechanism, the film spreading mechanism, the detection mechanism, and the laminating mechanism are all connected to the controller. This equipment can achieve high-precision lamination of the sheet and the film, reduce film waste, and prevent wrinkles throughout the process.

[0006] A better option is that the detection mechanism includes a detection support, a detection linear module, a measurement sliding base plate, a wire-drawing encoder, a detection transverse slide rail, a detection transverse slider, a wire-drawing steering roller, a sliding base, and a measurement roller. The detection linear module and the wire-drawing encoder are both installed on the frame through the detection support. The detection transverse slide rail is connected to the mobile end of the detection linear module through the measurement sliding base plate. The wire-drawing steering roller is located on the side of the detection transverse slide rail away from the wire-drawing encoder. The sliding base is slidably connected to the detection transverse slide rail through the detection transverse slider. The wire of the wire-drawing encoder passes through the wire-drawing steering roller and is connected to the sliding base. The measurement roller is rotatably connected to the sliding base. The measurement roller is located at the discharge end of the film pasting mechanism. Both the detection linear module and the wire-drawing encoder are connected to the controller. This detection mechanism can achieve board edge tracking at the level of ±0.1 mm and closed-loop control of the film feeding mechanism and the film spreading mechanism.

[0007] A better option is that the film spreading mechanism includes a film spreading support, a film spreading transverse slide rail, a film spreading sliding support, a second screw rod, a second transmission box, a film spreading motor, a guide roller, a knife rest rod, a longitudinal film cutting knife, and a flattening roller. The film spreading support is installed on the frame. The film spreading sliding support is slidably connected to the film spreading support through the film spreading transverse slide rail. Both the guide roller and the flattening roller are rotatably connected to the film spreading sliding support. The longitudinal film cutting knife is fixedly connected to the film spreading sliding support through the knife rest rod. The knife rest rod is located between the guide roller and the flattening roller. The film spreading motor is connected to one end of the second screw rod through the second transmission box. The other end of the second screw rod is threadedly connected to the film spreading sliding support. The film spreading motor is connected to the controller. This film spreading mechanism can achieve film flattening, film edge cutting, and film guiding, and dynamically adapt to the width change of the board.

[0008] A better option is that the film scribing mechanism includes a film cutting structure and a film pushing structure. Both the film cutting structure and the film pushing structure are installed on the frame. The film cutting structure and the film pushing structure are respectively located on both sides of the film. The film cutting structure and the film pushing structure match each other. Both the film cutting structure and the film pushing structure are connected to the controller. This film scribing mechanism uses the film pushing structure to tighten the film so that the film cutting structure can cut accurately.

[0009] A better option is that the film cutting structure includes a film cutting support, a film scribing linear module, a film cutting cylinder, and a transverse film cutting knife. The film scribing linear module is installed on the frame through the film cutting support. The transverse film cutting knife is installed on the mobile end of the film scribing linear module through the film cutting cylinder. The transverse film cutting knife matches the film pushing structure. Both the film cutting cylinder and the film scribing linear module are connected to the controller. This film cutting structure can complete the cutting of the full-width film.

[0010] A better choice, the film pushing structure includes a film pushing cylinder, a film pushing bracket, a film pushing longitudinal slide rail, a sliding gear seat, a fixed rack and a film pushing roller. The film pushing cylinder, the film pushing longitudinal slide rail and the fixed rack are all installed on the frame through the film pushing bracket. The sliding gear seat is slidably connected to the film pushing longitudinal slide rail. The sliding gear seat is connected to the telescopic rod of the film pushing cylinder. The two ends of the film pushing roller are respectively rotatably connected to the sliding gear seat. The two ends of the film pushing roller are respectively engaged with the fixed rack through transmission gears. The film pushing roller is matched with the film cutting structure. The film pushing cylinder is connected to the controller. This film pushing structure can eliminate the film skew caused by uneven unilateral thrust.

[0011] A better choice, the film feeding mechanism includes a film feeding bracket, a film roll transverse slide rail, a film roll bracket, a film roll, a first screw rod, a first transmission box and a film moving motor. The film roll bracket is slidably connected to the film feeding bracket through the film roll transverse slide rail. The film feeding bracket is installed on the top of the frame. The film moving motor is connected to one end of the first screw rod through the first transmission box. The other end of the first screw rod is threadedly connected to the film roll bracket. The two ends of the film roll are respectively rotatably connected to the film roll bracket. The film moving motor is connected to the controller. This film feeding mechanism can dynamically follow the width of the plate and reduce film waste.

[0012] A better choice, the vacuum roller mechanism includes a film suction bracket, a telescopic rack, an end fixing bracket, a transmission rod, a film suction motor and a film suction roller. The telescopic rack is slidably connected to the film suction bracket. The two ends of the transmission rod are respectively rotatably connected to the film suction bracket through the end fixing brackets. The two ends of the transmission rod are respectively engaged with the telescopic rack. The film suction motor is connected to the transmission rod. The two ends of the film suction roller are respectively rotatably connected to the telescopic rack. The film suction motor is connected to the controller. This vacuum roller mechanism can adapt to the width change of the film and keep the adsorption force uniform.

[0013] A better choice, the film pasting mechanism includes a top pressing cylinder, a rotating push rod, an upper roller hinge support, an upper roller, a lower roller, roller bearing seats and roller guide plates. The two ends of the upper roller are respectively rotatably connected to the roller bearing seats. The two ends of the lower roller are respectively rotatably connected to the roller bearing seats. The two sides of the roller bearing seats are respectively slidably connected to the frame through the roller guide plates. The upper roller is located above the lower roller. The top of the upper roller is connected to the upper roller hinge support. The upper roller hinge support is hinged to the rotating push rod. The rotating push rod is connected to the top pressing cylinder. The top pressing cylinder is installed on the frame. The top pressing cylinder is connected to the controller. The film is located between the upper roller and the lower roller. This film pasting mechanism can strongly bond the plate and the film.

[0014] A better choice is that the frame includes side frames, a first connecting rod, a second connecting rod, and an anti-collision guide roller frame. The upper ends of the side frames are connected by the second connecting rod, the lower ends of the side frames are connected by the first connecting rod, the anti-collision guide roller frame is connected to the first connecting rod and is located at the discharging end of the film pasting mechanism, the vacuum roller mechanism is connected to the second connecting rod, and the film feeding mechanism, the film scribing mechanism, the film spreading mechanism, and the film pasting mechanism are all installed on the side frames. This frame ensures the rigid foundation required for high-precision film pasting.

[0015] The present invention has the following advantages and beneficial effects compared with the prior art: The automatic edge-aligning thermal film pasting device for plates of the present invention can achieve high-precision positioning of the edges of the plate and the edges of the film through the detection mechanism, the film feeding mechanism, and the film spreading mechanism, and can perform high-precision thermal film pasting on the plates without hysteresis and zero deviation, avoiding waste of the film. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the automatic edge-aligning thermal film pasting device for plates of the present invention; Figure 2 is a schematic diagram of the film feeding mechanism of the automatic edge-aligning thermal film pasting device for plates of the present invention; Figure 3 is a schematic diagram of the film scribing mechanism of the automatic edge-aligning thermal film pasting device for plates of the present invention; Figure 4 is Figure 3 a partial enlarged view at A; Figure 5 is a schematic diagram of the vacuum roller mechanism of the automatic edge-aligning thermal film pasting device for plates of the present invention; Figure 6 is a schematic diagram of the film spreading mechanism of the automatic edge-aligning thermal film pasting device for plates of the present invention; Figure 7 is a schematic diagram of the detection mechanism of the automatic edge-aligning thermal film pasting device for plates of the present invention; Figure 8 is a schematic diagram of the detection mechanism of the automatic edge-aligning thermal film pasting device for plates of the present invention; Figure 9 is a schematic diagram of the film pasting mechanism of the automatic edge-aligning thermal film pasting device for plates of the present invention; Figure 10 is a schematic diagram of the frame of the automatic edge-aligning thermal film pasting device for plates of the present invention; Figure 11 is a schematic diagram of the automatic edge-aligning thermal film pasting device for plates of the present invention (in working state); Markings of each component in the drawings: 1 - Film feeding mechanism; 101 - Film feeding support; 102 - Film roller transverse sliding rail; 103 - Film roller support; 104 - Film roll roller; 105 - First screw; 106 - First transmission box; 107 - Film moving motor; 2 - Film scribing mechanism; 21 - Film cutting structure; 211 - Film cutting support; 212 - Scribing linear module; 213 - Film cutting cylinder; 214 - Transverse film cutting knife; 22 - Film pushing structure; 221 - Film pushing cylinder; 222 - Film pushing support; 223 - Film pushing longitudinal sliding rail; 224 - Sliding gear seat; 225 - Fixed rack; 226 - Film pushing roller; 3 - Vacuum roller mechanism; 301 - Film sucking support; 302 - Telescopic rack; 303 - Shaft end fixing support; 304 - Transmission rod; 305 - Film sucking motor; 306 - Film sucking roller; 4 - Film spreading mechanism; 401 - Film spreading support; 402 - Film spreading transverse sliding rail; 403 - Film spreading sliding support; 404 - Second screw; 405 - Second transmission box; 406 - Film spreading motor; 407 - Guide roller; 408 - Tool rest rod; 409 - Longitudinal film cutting knife; 410 - Flattening roller; 5 - Detection mechanism; 501 - Detection support; 502 - Detection linear module; 503 - Measuring sliding bottom plate; 504 - Wire drawing encoder; 505 - Detection transverse sliding rail; 506 - Detection transverse slider; 507 - Wire drawing steering roller; 508 - Sliding base; 509 - Measuring roller; 6 - Film pasting mechanism; 601 - Top pressing cylinder; 602 - Rotating push rod; 603 - Upper roller hinge support; 604 - Upper roller; 605 - Lower roller; 606 - Roller bearing seat; 607 - Roller guide plate; 7 - Machine frame; 701 - Side frame; 702 - First connecting rod; 703 - Second connecting rod; 704 - Anti-collision guide roller frame; 8 - Film; 9 - Plate; a - First direction; b - Second direction; c - Third direction. Detailed implementation manners

[0017] The following further describes the invention object of the present invention in detail in conjunction with the drawings and specific embodiments. The embodiments cannot be elaborated one by one here, but the implementation manners of the present invention are not limited to the following embodiments.

[0018] In this embodiment, in the first direction a, the arrow direction is to the right, and the direction opposite to the arrow is to the left; in the second direction b, the arrow direction is to the rear, and the direction opposite to the arrow is to the front; in the third direction c, the arrow direction is upward, and the direction opposite to the arrow is downward.

[0019] As Figure 1As shown in the figure, an automatic edge-aligning heat-film laminating device for plates includes a film-feeding mechanism 1, a film-cutting mechanism 2, a vacuum roller mechanism 3, a film-unfolding mechanism 4, a detection mechanism 5, a film-laminating mechanism 6, a frame 7, and a controller. The film-feeding mechanism 1, the film-cutting mechanism 2, the vacuum roller mechanism 3, and the film-laminating mechanism 6 are sequentially installed on the frame 7 from top to bottom, and the film-feeding mechanism 1 is located at the top of the frame 7. The film-laminating mechanism 6 is located below the film-cutting mechanism 2. A film roll is installed on the film-feeding mechanism 1, and the film 8 of the film roll passes downward through the film-cutting mechanism 2 and then passes through the film-unfolding mechanism 4 and is connected to the film-laminating mechanism 6. The vacuum roller mechanism 3 is located at the rear side of the film 8. The detection mechanism 5 is installed on the front side of the frame 7 and is located at the discharging end of the film-laminating mechanism 6. The film-feeding mechanism 1, the film-cutting mechanism 2, the vacuum roller mechanism 3, the film-unfolding mechanism 4, the detection mechanism 5, and the film-laminating mechanism 6 are all connected to the controller.

[0020] The film-feeding mechanism 1 is used to store and release the film roll, dynamically adjust the position of the film roll in the second direction b according to the width of the plate 9, and ensure the alignment of the film 8 and the plate 9. The film-cutting mechanism 2 is used to cut the film 8 to the required length and push the film 8 to assist in cutting. The vacuum roller mechanism 3 is used to adsorb and convey the film 8 to eliminate wrinkles. The film-unfolding mechanism 4 is used to flatten the film 8, cut off the excess edge material, and accurately position the film-laminating position. The detection mechanism 5 is used to detect the edge position of the plate 9 in real time and feedback data to dynamically adjust the position of the film 8. The film-laminating mechanism 6 applies pressure to the plate 9 to complete the lamination of the film 8. The frame 7 is used to support all mechanisms and ensure the stability of the device. The controller (not shown in the figure) is a PLC controller, which is used to control the coordinated operation of each mechanism.

[0021] As Figure 2 shown, the film-feeding mechanism 1 includes two film-feeding brackets 101, four film-roller transverse sliding rails 102, two film-roller brackets 103, two film-roll rollers 104, a first screw 105, a first transmission box 106, and a film-shifting motor 107. The two film-feeding brackets 101 are respectively installed on the tops of the two side frames 701 of the frame 7. On the top of each film-feeding bracket 101, two mutually parallel film-roller transverse sliding rails 102 are installed, and the two film-roller transverse sliding rails 102 are both perpendicular to the axis of the film-feeding bracket 101. The top of each film-roller bracket 103 is slidably connected to the two film-roller transverse sliding rails 102. The film-roller bracket 103 on the left side is threadedly connected to the right end of the first screw 105, and the left end of the first screw 105 is connected to the output end of the first transmission box 106. The first transmission box 106 is installed on the top of the film-feeding bracket 101 on the left side. The input end of the first transmission box 106 is connected to the rotating shaft of the film-shifting motor 107. The left ends of the two film-roll rollers 104 are both rotatably connected to the film-roller bracket 103 on the left side, and the right ends of the two film-roll rollers 104 are both rotatably connected to the film-roller bracket 103 on the right side. The two film-roll rollers 104 are parallel to each other. The film-shifting motor 107 is connected to the controller through wires.

[0022] The film releasing bracket 101 is used as the basic frame of the mechanism and is fixed on both sides of the top of the frame 7 to support all moving parts. The film roller transverse sliding rail 102 is a track for guiding the film roller bracket 103 to move laterally in the first direction a, ensuring translational stability. The film roller bracket 103 is used to carry the film roll 104 and drive the film roll 104 to move laterally in the first direction a. The film roll 104 is used to directly carry the film roll and release the film 8. The first screw 105 is used to convert the rotational motion of the film moving motor 107 into linear motion and push the film roller bracket 103 to move in the first direction a. The first transmission box 106 is used to transmit power and distribute the motion direction. The film moving motor 107 provides power for the film roll 104 to move left and right in the first direction a.

[0023] As Figure 3 shown, the film cutting mechanism 2 includes a film cutting structure 21 and a film pushing structure 22. Both ends of the film cutting structure 21 are installed on the two side frames 701 of the frame 7 and are located behind the film 8. The film pushing structure 22 is installed on the two side frames 701 of the frame 7 and is located in front of the film 8. Both the film cutting structure 21 and the film pushing structure 22 are controlled by the controller. The film cutting structure 21 is used to cut the film 8 in the first direction a. The film pushing structure 22 is used to push the film 8 to assist in cutting and maintain tension.

[0024] As Figure 3 shown, the film cutting structure 21 includes a film cutting bracket 211, a film cutting linear module 212, a film cutting cylinder 213 and a transverse film cutting knife 214. Both ends of the film cutting bracket 211 are installed on the two side frames 701 of the frame 7. The film cutting linear module 212 is fixedly installed on the top of the film cutting bracket 211. The film cutting cylinder 213 is installed on the transverse mobile end of the film cutting linear module 212. The axial direction of the film cutting linear module 212 is perpendicular to the axial direction of the film cutting cylinder 213. The transverse film cutting knife 214 is connected to the telescopic rod of the film cutting cylinder 213, and the transverse film cutting knife 214 is located behind the film 8. Both the film cutting linear module 212 and the film cutting cylinder 213 are controlled by the controller.

[0025] The film cutting bracket 211 serves as the structural base, with both ends fixed on the side frames 701 of the frame 7, providing rigid support for other components. The film cutting linear module 212 is used to drive the transverse film cutting knife 214 to move in the first direction a and control the cutting path. The film cutting cylinder 213 is used to drive the transverse film cutting knife 214 to move in the second direction b, so that the transverse film cutting knife 214 moves to the immediate left of the film 8. The transverse film cutting knife 214 is used to cut off the film 8.

[0026] As Figure 3 and 4As shown, the film pushing structure 22 includes two film pushing cylinders 221, two film pushing brackets 222, two longitudinal film pushing slide rails 223, two sliding gear seats 224, two fixed racks 225 and a film pushing roller 226. The two film pushing brackets 222 are respectively installed on the upper parts of the two side frames 701 of the frame 7. The two longitudinal film pushing slide rails 223 are respectively installed on the inner sides of the two film pushing brackets 222. The two fixed racks 225 are respectively installed on the tops of the two film pushing brackets 222. The two sliding gear seats 224 are respectively slidably connected to the two longitudinal film pushing slide rails 223. The two film pushing cylinders 221 are respectively installed at the front ends of the film pushing brackets 222, and the telescopic rods of the two film pushing cylinders 221 are respectively fixedly connected to the two sliding gear seats 224. The two ends of the film pushing roller 226 are respectively rotatably connected to the two sliding gear seats 224. Transmission gears are provided at both ends of the film pushing roller 226, and the two transmission gears are respectively engaged with the two fixed racks 225. The film pushing roller 226 is in front of the film 8. The two film pushing cylinders 221 are both controlled by the controller.

[0027] The film pushing cylinder 221 is used to provide the driving force for the film pushing roller 226 to move in the second direction b, and drive the film pushing roller 226 to press against the film 8. The film pushing bracket 222 is used to carry each component. The longitudinal film pushing slide rail 223 provides guidance for the sliding gear seat 224 in the second direction b and restricts the movement direction. The sliding gear seat 224 is used to install both ends of the film pushing roller 226. The fixed rack 225 is used as the reference track for the movement of the transmission gear to ensure the synchronism of the film pushing roller 226. The film pushing roller 226 is used to directly contact the surface of the film 8, can be driven by the film 8 to rotate, and applies a parallel backward thrust in the second direction b to make it close to the transverse film cutting knife 214.

[0028] Description of the working process of the film scratching mechanism 2: When it is necessary to cut the film 8, the film pushing cylinder 221 receives the command from the controller and extends the telescopic rod, pushing the sliding gear seat 224 to move along the film pushing longitudinal slide rail 223 towards the film 8 (i.e., in the second direction b backward). The transmission gears at both ends of the film pushing roller 226 are engaged with the fixed rack 225, forcing bilateral synchronous movement to ensure that the film pushing roller 226 presses parallel to the surface of the film 8, eliminating the skew of the film 8 caused by unilateral thrust. After the film pushing roller 226 contacts the film 8, a continuous backward pressure is applied in the second direction b, making the film 8 taut and close to the transverse film cutting knife 214 to establish the required tension for cutting. The film cutting cylinder 213 drives the transverse film cutting knife 214 to move forward in the second direction b, and adjusts to the exact left side of the side edge of the film 8 to ensure that the cutting starting point is aligned. The film scratching linear module 212 is started, driving the transverse film cutting knife 214 to move uniformly along the first direction a (i.e., parallel to the width direction of the film 8). The taut film 8 is cut across the full width under the action of the cutting edge of the transverse film cutting knife 214. The film pushing cylinder 221 retracts the telescopic rod, pulling the film pushing roller 226 away from the surface of the film 8 to relieve the tension. The film scratching linear module 212 moves in the reverse direction, retracting the transverse film cutting knife 214 to its initial position; at the same time, the film cutting cylinder 213 retracts the transverse film cutting knife 214 to avoid interfering with the conveying of the film 8.

[0029] As Figure 5 shown, the vacuum roller mechanism 3 includes two film suction brackets 301, two telescopic racks 302, two shaft end fixed brackets 303, a transmission rod 304, a film suction motor 305 and a film suction roller 306. The two film suction brackets 301 are respectively installed on the two second connecting rods 703 of the frame 7. The bottoms of the two telescopic racks 302 are respectively slidably connected to the two film suction brackets 301 through four linear guide rails. The two ends of the transmission rod 304 are respectively rotatably connected to the two shaft end fixed brackets 303. A transmission gear is respectively provided at the two ends of the transmission rod 304, and the two transmission gears are respectively engaged with the two telescopic racks 302. The film suction motor 305 is installed on the right film suction bracket 301. The film suction motor 305 is connected to the transmission rod 304. The rear ends of the two telescopic racks 302 are respectively rotatably connected to the two ends of the film suction roller 306 through bearings. The film suction motor 305 is controlled by the controller.

[0030] The film suction bracket 301 is used to provide structural stability. The telescopic rack 302 adjusts the distance between the film suction roller 306 and the film 8 through telescopic movement to adapt to different film 8 sizes. The shaft end fixed bracket 303 is used to install the two ends of the transmission rod 304. The transmission rod 304 serves as the core of power distribution, synchronously transmitting the torque of the film suction motor 305 to the bilateral telescopic racks 302. The film suction motor 305 provides a precise and controllable power source to drive the rotation of the transmission rod 304. The surface of the film suction roller 306 is distributed with vacuum adsorption holes for adsorbing the film 8 to eliminate wrinkles.

[0031] Description of the working process of the vacuum roller mechanism 3: When the film 8 is cut by the film scribing mechanism 2, the film suction motor 305 receives the controller's instruction and starts to drive the transmission rod 304 to rotate. The transmission gears at both ends of the transmission rod 304 drive the bilateral telescopic racks 302 to extend forward synchronously along the linear guide rails. The telescopic racks 302 push the film suction roller 306 to approach the film 8 in the second direction b. After the film suction roller 306 is in place, the controller triggers the vacuum pump to work, sucking the air inside the film suction roller 306. The suction holes on the roller surface of the film suction roller 306 generate negative pressure, forming a state to be adsorbed. The film suction roller 306 continuously maintains negative pressure, and the suction force generated by the suction holes adheres a local area of the film 8 to the roller surface. The film 8 is gradually flattened under a micro-tension, eliminating the initial wrinkles. The film pasting mechanism 6 starts to pull the film 8 to move downward along the third direction a. The film suction roller 306 rotates passively under the support of the bearings, and the suction holes on the roller surface continuously adsorb the film 8 to ensure no slippage and no secondary wrinkles during the conveying process. After the film 8 completely passes through, the controller executes the reset instruction.

[0032] As Figure 6 shown, the film spreading mechanism 4 includes two film spreading brackets 401, four film spreading transverse slide rails 402, two film spreading sliding brackets 403, a second screw rod 404, a second transmission box 405, a film spreading motor 406, a guide roller 407, a knife rest rod 408, four longitudinal film cutting knives 409, and a flattening roller 410. The two film spreading brackets 401 are respectively installed on the front sides of the two side frames 701 of the frame 7. The four film spreading transverse slide rails 402 are respectively connected to the outer sides of the two film spreading brackets 401, and the axial directions of the four film spreading transverse slide rails 402 are perpendicular to the axial directions of the film spreading brackets 401. The bottom ends of the two film spreading sliding brackets 403 are respectively slidably connected to the four film spreading transverse slide rails 402. The guide roller 407, the knife rest rod 408, and the flattening roller 410 are installed on the film spreading sliding brackets 403 from top to bottom in sequence. The two ends of the guide roller 407 are respectively rotationally connected to the film spreading sliding brackets 403 through bearings. The two ends of the knife rest rod 408 are fixedly connected to the film spreading sliding brackets 403. The two ends of the flattening roller 410 are respectively rotationally connected to the film spreading sliding brackets 403 through bearings. The four longitudinal film cutting knives 409 are detachably connected to the knife rest rod 408, that is, the four longitudinal film cutting knives 409 can be adjusted in position on the knife rest rod 408, and the four longitudinal film cutting knives 409 are divided into two groups, with two longitudinal film cutting knives 409 in each group. The film spreading motor 406 is installed on the left film spreading bracket 401 through the second transmission box 405. The second transmission box 405 is threadedly connected to the film spreading sliding bracket 403 through the second screw rod 404. The film spreading motor 406 is connected to the controller.

[0033] The film spreading support 401 is used for the basic support of the mechanism and is fixed to the front side of the side frame 701 of the frame 7, bearing the film spreading transverse slide rail 402 and the second transmission box 405. The film spreading transverse slide rail 402 provides high-precision lateral guidance for the sliding support in the first direction a to ensure the smooth movement of the film spreading sliding support 403. The film spreading sliding support 403 is used to integrate the core components for film 8 processing (including the guiding roller 407, the longitudinal film cutting knife 409, and the flattening roller 410), and its overall lateral movement adapts to the width of the plate. The second screw rod 404 is used to convert the rotation of the film spreading motor 406 into a linear motion to drive the sliding support to displace laterally in the first direction a. The second transmission box 405 is used to transmit power and convert the direction of motion, and supports the rotation of the second screw rod 404. The film spreading motor 406 is used to provide a power source and precisely control the position of the sliding support. The guiding roller 407 is the final guiding roller for film 8 conveyance, and precisely guides the film 8 to the film attaching mechanism 6. The tool rest rod 408 is a rigid cross beam for fixing the longitudinal film cutting knife 409. The longitudinal film cutting knife 409 is used to cut off the redundant waste edges on both sides of the film 8, that is, to precisely trim the film 8. The flattening roller 410 is used to eliminate the wrinkles of the film 8.

[0034] As Figure 7 and 8 shown, the detection mechanism 5 includes a detection support 501, a detection linear module 502, a measurement sliding bottom plate 503, a wire drawing encoder 504, a detection transverse slide rail 505, a detection transverse slider 506, a wire drawing steering roller 507, a sliding base 508, and a measurement roller 509. Both ends of the detection support 501 are respectively installed on the front sides of the two side frames 701 of the frame 7. The detection linear module 502 is fixedly installed on the outside of the detection support 501. The measurement sliding bottom plate 503 is connected to the moving end of the detection linear module 502. The detection transverse slide rail 505 is connected to the outer side surface of the measurement sliding bottom plate 503, and the axial direction of the detection transverse slide rail 505 is the same as the axial direction of the measurement sliding bottom plate 503. The bottom of the sliding base 508 is slidably connected to the detection transverse slide rail 505 through the detection transverse slider 506. The wire drawing encoder 504 is installed on the detection support 501 and is located above the left end of the detection linear module 502. The wire drawing steering roller 507 is rotatably installed at the right end of the measurement sliding bottom plate 503. The wire of the wire drawing encoder 504 passes through the wire drawing steering roller 507 and then is connected to the sliding base 508. The measurement roller 509 is rotationally connected to the sliding base 508 through a main shaft. The measurement roller 509 is located at the discharging end of the film attaching mechanism 6 (that is, on the left side of the plate 9). Both the detection linear module 502 and the wire drawing encoder 504 are controlled by the controller.

[0035] The detection bracket 501 is used for the base platform installed across the rack 7, with both ends fixed to the front side of the side frame 701 of the rack 7, and bears all detection components. The detection linear module 502 is used to drive the measurement component for lateral coarse adjustment and positioning. The measurement sliding base plate 503 is a transition substrate for connecting the detection linear module 502 and the detection lateral slide rail 505, and transmits motion. The wire-pulling encoder 504 is used to measure the micro-displacement of the sliding base 508. The detection lateral slide rail 505 provides high-precision guidance for the sliding base 508, and the direction is perpendicular to the moving direction of the sheet 9. The detection lateral slider 506 is used to connect the sliding base 508 and the detection lateral slide rail 505 to achieve micro-movement and sliding. The wire-pulling steering roller 507 is used to change the wire-pulling direction and reduce friction loss. The sliding base 508 integrates the final measurement unit (i.e., the measurement roller 509), and finely adjusts the position along the slide rail. The measurement roller 509 is used to directly contact the edge of the sheet 9 to detect the actual position.

[0036] As Figure 9 shown, the film laminating mechanism 6 includes two pressing cylinders 601, two rotating push rods 602, two upper roller hinge supports 603, an upper roller 604, a lower roller 605, four roller bearing seats 606 and eight roller guide plates 607. Both ends of the lower roller 605 are respectively rotatably connected to two roller bearing seats 606, and both ends of the upper roller 604 are respectively rotatably connected to two roller bearing seats 606. Both sides of the four roller bearing seats 606 are respectively installed in the two side frames 701 of the rack 7 through eight roller guide plates 607, and each roller bearing seat 606 can slide up and down in the third direction c relative to the corresponding two roller guide plates 607. The upper roller 604 is located above the lower roller 605. The top ends of both ends of the two upper rollers 604 are respectively connected to the lower ends of the two upper roller hinge supports 603, and the upper ends of the two upper roller hinge supports 603 are respectively rotatably connected to the lower ends of the two rotating push rods 602. The upper ends of the two rotating push rods 602 are respectively connected to the two pressing cylinders 601, and the two pressing cylinders 601 are respectively installed on the upper parts of the two side frames 701 of the rack 7. Both of the two pressing cylinders 601 are controlled by a controller.

[0037] The pressing cylinder 601 provides a controllable downward pressure source to drive the upper roller 604 to press and fit the film 8 and the sheet 9. The rotating push rod 602 converts the vertical thrust of the pressing cylinder 601 into lever force amplification to magnify the downward pressure. The upper roller hinge support 603 is used to connect the rotating push rod 602 and the upper roller 604, transmit the downward pressure and allow the roller to finely adjust the angle. The upper roller 604 and the lower roller 605 are used to laminate the film 8 on the sheet 9. The roller guide plate 607 is a high-precision guiding component that restricts the roller to move only in the vertical direction and eliminates lateral offset.

[0038] As Figure 10As shown in the figure, the frame 7 includes two side frames 701, two first connecting rods 702, two second connecting rods 703, and a collision-proof guide roller frame 704. The two side frames 701 are arranged in parallel. The upper ends of the two side frames 701 are fixedly connected by two second connecting rods 703, and the two second connecting rods 703 are parallel to each other. The lower ends of the two side frames 701 are fixedly connected by two first connecting rods 702, and the two first connecting rods 702 are parallel to each other. The collision-proof guide roller frame 704 is installed on the two first connecting rods 702.

[0039] The side frame 701 is the load-bearing frame of the equipment main body, supporting all functional mechanisms. The first connecting rod 702 serves as the bottom torsion-resistant beam, connecting the lower ends of the two side frames 701 to resist the torsional moment in the horizontal plane. The second connecting rod 703 serves as the top compressive beam, connecting the upper ends of the two side frames 701 to bear the vertical load. The collision-proof guide roller frame 704 serves as the core component for safety protection at the discharging end and guiding the sheet 9.

[0040] As Figure 11 shown, a method for using a hot film laminating device for automatic edge alignment of sheets includes the following steps: Step 1. Equipment initialization and temperature control: Install the hot film laminating device behind the curing furnace (which belongs to the prior art). By controlling the temperature of the front cooling water, the temperature of the sheet 9 during film laminating can be controlled (the temperature range of the sheet 9 during film laminating is 45 - 55 degrees Celsius) to achieve the hot lamination effect and ensure the stability of the film laminating viscosity.

[0041] Step 2. The sheet 9 enters the equipment and initial positioning: When the hot film laminating device starts to work, in the second direction b, the sheet 9 is ready to enter the hot film laminating device from the front, and the sheet 9 passes through the detection mechanism 5.

[0042] Step 3. Coarse positioning by the detection mechanism 5: The detection linear module 502 moves to the right in the first direction a, and the measuring roller 509 moves to the right along with the detection linear module 502.

[0043] Step 4. Edge contact detection of the sheet 9: When the measuring roller 509 contacts the edge of the sheet 9, the measuring roller 509 stops moving to the right due to the blockage of the sheet 9, but the detection linear module 502 still drives the measuring sliding base plate 503 to continue moving to the right.

[0044] Step 5. Precise positioning and signal feedback: At this time, under the action of the force between the measuring roller 509 and the sheet edge, the sliding base 508 moves to the left relative to the measuring sliding base plate 503 until the wire-drawing encoder 504 detects the displacement change of the measuring roller 509, and then the detection linear module 502 stops moving. That is, the left and right movement of the edge of the sheet 9 in the first direction a will drive the measuring roller 509 to make corresponding left and right movements, and the movement of the measuring roller 509 will drive the wire-drawing encoder 504 to work. The wire-drawing encoder 504 generates a pulse signal and feeds it back to the controller.

[0045] Step 6: The controller processes the pulse signal in real time, then amplifies the signal through a frequency multiplier and calculates the displacement, and synchronously controls the film moving motor 107 of the film feeding mechanism 1 to drive the film roll 104 to move horizontally in the first direction a and the film spreading motor 406 of the film spreading mechanism 4 to drive the film spreading sliding bracket 403 to move horizontally in the first direction a. That is, the distance that the measuring roller 509 moves in the first direction a is achieved. The film roll 104 and the film spreading sliding bracket 403 both move the same distance synchronously and in the same direction, so as to realize the precise positioning of the film edge of the film 8 automatically following the plate edge of the plate 9. After the upper roller 604 presses down in the third direction c, the film 8 and the plate 9 pass between the upper roller 604 and the lower roller 605 of the thermal laminating device, and the upper roller 604 presses down to laminate the film 8 and the plate 9 under the action of the pressing cylinder 601.

[0046] Technical advantages of a thermal laminating device for automatic edge alignment of plates: 1. Dynamic real-time compensation: Achieve millisecond-level response through a closed-loop control system; 2. High-precision synchronization: The collaborative displacement accuracy of three mechanisms (detection mechanism 5 / film feeding mechanism 1 / film spreading mechanism 4) reaches ±0.1 mm; 3. Adaptive ability: Automatically adapt to plates 9 with different widths and deviation; 4. Waste reduction: The precise edge alignment of the plate 9 and the film 8 can avoid wasting the film 8.

[0047] The above specific implementation manners are the preferred embodiments of the present invention and cannot limit the present invention. Any other changes or other equivalent replacement methods made without departing from the technical solution of the present invention are included in the protection scope of the present invention.

Claims

1. An automatic edge-aligning heat film laminating device for plates, characterized in that: It includes a film feeding mechanism (1), a film scribing mechanism (2), a vacuum roller mechanism (3), a film spreading mechanism (4), a detection mechanism (5), a film pasting mechanism (6), a frame (7) and a controller. The film feeding mechanism (1), the film scribing mechanism (2), the vacuum roller mechanism (3), the film spreading mechanism (4), the detection mechanism (5) and the film pasting mechanism (6) are all installed on the frame (7). The film feeding mechanism (1) is provided with a film (8), and the film (8) sequentially passes through the film scribing mechanism (2), the vacuum roller mechanism (3), the film spreading mechanism (4) and is connected to the film pasting mechanism (6). The detection mechanism (5) is located at the discharging end of the film pasting mechanism (6). The film feeding mechanism (1), the film scribing mechanism (2), the vacuum roller mechanism (3), the film spreading mechanism (4), the detection mechanism (5) and the film pasting mechanism (6) are all connected to the controller.

2. The automatic edge-aligning heat laminating device for a sheet according to claim 1, characterized in that: The detection mechanism (5) includes a detection bracket (501), a detection linear module (502), a measurement sliding base plate (503), a wire drawing encoder (504), a detection transverse slide rail (505), a detection transverse slider (506), a wire drawing steering roller (507), a sliding base (508) and a measurement roller (509). The detection linear module (502) and the wire drawing encoder (504) are both installed on the frame (7) through the detection bracket (501). The detection transverse slide rail (505) is connected to the moving end of the detection linear module (502) through the measurement sliding base plate (503). The wire drawing steering roller (507) is located on the side of the detection transverse slide rail (505) away from the wire drawing encoder (504). The sliding base (508) is slidably connected to the detection transverse slide rail (505) through the detection transverse slider (506). The wire of the wire drawing encoder (504) passes through the wire drawing steering roller (507) and is connected to the sliding base (508). The measurement roller (509) is rotatably connected to the sliding base (508). The measurement roller (509) is located at the discharging end of the film pasting mechanism (6). The detection linear module (502) and the wire drawing encoder (504) are both connected to the controller.

3. The automatic edge-aligning heat film laminating device for a board according to claim 1, characterized in that: The film spreading mechanism (4) includes a film spreading support (401), a film spreading transverse slide rail (402), a film spreading sliding support (403), a second screw rod (404), a second transmission box (405), a film spreading motor (406), a guiding roller (407), a tool rest rod (408), a longitudinal film cutting knife (409) and a flattening roller (410). The film spreading support (401) is installed on the frame (7). The film spreading sliding support (403) is slidably connected to the film spreading support (401) through the film spreading transverse slide rail (402). The guiding roller (407) and the flattening roller (410) are both rotatably connected to the film spreading sliding support (403). The longitudinal film cutting knife (409) is fixedly connected to the film spreading sliding support (403) through the tool rest rod (408). The tool rest rod (408) is located between the guiding roller (407) and the flattening roller (410). One end of the second screw rod (404) is connected to the film spreading motor (406) through the second transmission box (405), and the other end of the second screw rod (404) is threadedly connected to the film spreading sliding support (403). The film spreading motor (406) is connected to the controller.

4. The automatic edge-aligning heat laminating device for a board according to claim 1, characterized in that: The film scoring mechanism (2) includes a film cutting structure (21) and a film pushing structure (22). The film cutting structure (21) and the film pushing structure (22) are both installed on the frame (7). The film cutting structure (21) and the film pushing structure (22) are respectively located on both sides of the film (8). The film cutting structure (21) and the film pushing structure (22) are matched with each other. The film cutting structure (21) and the film pushing structure (22) are both connected to the controller.

5. The automatic edge-aligning heat laminating device for a sheet according to claim 4, characterized in that: The film cutting structure (21) includes a film cutting support (211), a film scoring linear module (212), a film cutting cylinder (213) and a transverse film cutting knife (214). The film scoring linear module (212) is installed on the frame (7) through the film cutting support (211). The transverse film cutting knife (214) is installed on the moving end of the film scoring linear module (212) through the film cutting cylinder (213). The transverse film cutting knife (214) is matched with the film pushing structure (22). The film cutting cylinder (213) and the film scoring linear module (212) are both connected to the controller.

6. The automatic edge-aligning heat laminating device for a board according to claim 4, wherein: The film pushing structure (22) includes a film pushing cylinder (221), a film pushing support (222), a film pushing longitudinal slide rail (223), a sliding gear seat (224), a fixed rack (225), and a film pushing roller (226). The film pushing cylinder (221), the film pushing longitudinal slide rail (223), and the fixed rack (225) are all installed on the frame (7) through the film pushing support (222). The sliding gear seat (224) is slidably connected to the film pushing longitudinal slide rail (223). The sliding gear seat (224) is connected to the telescopic rod of the film pushing cylinder (221). The two ends of the film pushing roller (226) are respectively rotatably connected to the sliding gear seat (224). The two ends of the film pushing roller (226) are respectively engaged with the fixed rack (225) through transmission gears. The film pushing roller (226) is matched with the film cutting structure (21). The film pushing cylinder (221) is connected to the controller.

7. The automatic edge-aligning heat laminating device for a board according to claim 1, characterized in that: The film releasing mechanism (1) includes a film releasing support (101), a film roll transverse slide rail (102), a film roll support (103), a film roll (104), a first screw rod (105), a first transmission box (106), and a film moving motor (107). The film roll support (103) is slidably connected to the film releasing support (101) through the film roll transverse slide rail (102). The film releasing support (101) is installed on the top of the frame (7). The film moving motor (107) is connected to one end of the first screw rod (105) through the first transmission box (106). The other end of the first screw rod (105) is threadedly connected to the film roll support (103). The two ends of the film roll (104) are respectively rotatably connected to the film roll support (103). The film moving motor (107) is connected to the controller.

8. The automatic edge-aligning heat laminating device for a board according to claim 1, characterized in that: The vacuum roller mechanism (3) includes a film suction support (301), a telescopic rack (302), an end fixing support (303), a transmission rod (304), a film suction motor (305), and a film suction roller (306). The telescopic rack (302) is slidably connected to the film suction support (301). The two ends of the transmission rod (304) are respectively rotatably connected to the film suction support (301) through the end fixing support (303). The two ends of the transmission rod (304) are respectively engaged with the telescopic rack (302). The film suction motor (305) is connected to the transmission rod (304). The two ends of the film suction roller (306) are respectively rotatably connected to the telescopic rack (302). The film suction motor (305) is connected to the controller.

9. The automatic edge-aligning heat laminating device for a board according to claim 1, characterized in that: The film pasting mechanism (6) includes a pressing cylinder (601), a rotating push rod (602), an upper roller hinge support (603), an upper roller (604), a lower roller (605), a roller bearing seat (606) and a roller guide plate (607). Both ends of the upper roller (604) are rotatably connected to the roller bearing seat (606), both ends of the lower roller (605) are rotatably connected to the roller bearing seat (606), both sides of the roller bearing seat (606) are slidably connected to the frame (7) through the roller guide plate (607). The upper roller (604) is located above the lower roller (605). The top of the upper roller (604) is connected to the upper roller hinge support (603), the upper roller hinge support (603) is hinged to the rotating push rod (602), the rotating push rod (602) is connected to the pressing cylinder (601), the pressing cylinder (601) is installed on the frame (7), the pressing cylinder (601) is connected to the controller, and the film (8) is located between the upper roller (604) and the lower roller (605).

10. The automatic edge-aligning heat laminating device for sheet materials according to claim 1, characterized in that: The frame (7) includes side frames (701), a first connecting rod (702), a second connecting rod (703) and an anti-collision guide roller frame (704). The upper ends of the side frames (701) are connected through the second connecting rod (703), the lower ends of the side frames (701) are connected through the first connecting rod (702). The anti-collision guide roller frame (704) is connected to the first connecting rod (702) and is located at the discharge end of the film pasting mechanism (6). The vacuum roller mechanism (3) is connected to the second connecting rod (703). The film feeding mechanism (1), the film scribing mechanism (2), the film spreading mechanism (4) and the film pasting mechanism (6) are all installed on the side frames (701).

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