High-barrier polyester composite food packaging material production equipment and method

Abstract

The invention discloses high-barrier-property polyester composite food packaging material production equipment and method.The high-barrier-property polyester composite food packaging material production equipment is characterized in that a first guide roller, a second guide roller and a third guide roller are rotationally connected to a support, a vertical frame is arranged on the portion, between the second guide roller and the third guide roller, of the support, and a leveling plate is arranged on a lead screw; a transmission belt is arranged on the vertical frame below the lead screw, a shifting rod is rotationally connected to the transmission belt, and a rubber ball is arranged at the output end of the shifting rod. A coiled flat thin layer is placed on a packaging machine, then the flat thin layer penetrates through a first guide roller, a second guide roller and a third guide roller and is finally conveyed through a conveying roller, the flat thin layer is located between a troweling plate and a shifting rod when passing through the second guide roller and the third guide roller, and the flat thin layer can be shifted by the shifting rod in the conveying process. The wrinkles can be spread out, and then the flattening of the flat thin layer can be realized by pushing of the trowelling plate, so that four corners are avoided during printing, and the production quality is improved.

Description

Technical Field

[0001] The present application relates to the technical field of packaging material production equipment, and in particular to a production equipment and method for a high-barrier polyester composite food packaging material. Background Art

[0002] In order to maintain the quality of food, prevent food from spoiling during storage, circulation and sales, prevent microbial contamination, and prevent excessive chemical and physical changes, all kinds of food must be packaged. In order to meet the needs of food packaging, packaging materials are classified according to the type of food, including metal can packaging, glass bottle packaging, paper container packaging, plastic packaging, etc., and plastic packaging is developing rapidly.

[0003] Polyester composite materials are widely used in puffed food packaging, beverage food packaging and frozen food packaging. Before being made into packaging bags, polyester composite materials need to be processed and processed into flat thin layers. After conveying processing, the required pattern is printed on the flat thin layers to complete the production. However, before printing, the rolled flat thin layers need to be placed on the packaging machine for conveying. However, because the flat thin layers will be wrinkled when rolled, there will be unprinted areas on the flat thin layers during conveying and printing, which will affect the quality of the finished product. Summary of the Invention

[0004] One of the purposes of this application is to provide a production device and method for a high-barrier polyester composite food packaging material.

[0005] To achieve the above objectives, the technical solution adopted in this application is: a high-barrier polyester composite food packaging material production equipment, including a packaging machine, a controller, a conveyor roller and a placement rack, a bracket is provided in the packaging machine between the placement rack and the conveyor roller, a first guide roller, a second guide roller and a third guide roller are rotatably connected to the bracket, a vertical frame is provided on the bracket between the second guide roller and the third guide roller, a screw rod is provided on the vertical frame for pushing, a screed is provided on the screw rod, a transmission belt is provided on the vertical frame below the screw rod, a shift rod is rotatably connected to the transmission belt, and a rubber ball is provided on the output end of the shift rod.

[0006] Preferably, the installation height of the first guide roller is lower than the placement height of the placement rack, the installation heights of the second guide roller and the third guide roller are higher than the installation height of the first guide roller, the heights of the second guide roller and the third guide roller are the same, and the installation heights of the second guide roller and the third guide roller are lower than the conveying position of the conveying roller.

[0007] Preferably, a horizontal platform is provided on the vertical frame, and the horizontal platform is arranged along the length of the bracket. The horizontal platform and the vertical frame are arranged in a T-shape as a whole. A vertical platform is provided on the horizontal platform, and the vertical platform and the horizontal platform are arranged in a T-shape as a whole. The vertical platform is rotatably connected with a pulley, and the pulleys are respectively located at both ends of the vertical platform.

[0008] Preferably, a transmission belt is sleeved on the pulley of the vertical platform, and a fixed seat is rotatably connected to the transmission belt. A shift rod is welded to the top of the fixed seat, and a gear is provided on the fixed seat. The gear is meshed with a rack, and the rack is provided on the vertical platform and arranged along the length of the vertical platform.

[0009] Preferably, a first worm gear is provided on the pulley on the stand, the first worm gear is meshingly connected with a first worm, the first worm is arranged on the output end of the servo motor, a linkage rod is installed on the first worm, a second worm is installed at the top position of the linkage rod, and the first worm and the second worm are coaxially arranged.

[0010] Preferably, a limit rod is fixedly connected to the vertical frame, the limit rod is arranged along the length of the horizontal platform, the limit rod and the screw rod are arranged parallel to each other, the limit rod and the screw rod have the same length, the diameter of the limit rod is smaller than the diameter of the screw rod, and a second worm gear is provided on the input end of the limit rod.

[0011] Preferably, the second worm gear is meshedly connected with a second worm, the second worm gear and the first worm gear are arranged in a cross shape, and the second worm gear is located above the first worm gear.

[0012] Preferably, the movable seat is arranged in a rectangular shape as a whole, and a screw rod and a limiting rod are respectively connected to the movable seat, and the screw rod is threadedly connected to the movable seat.

[0013] Preferably, a sliding rod is slidably connected to the movable seat, and the sliding rod is arranged in a T-shape as a whole. The sliding rod is connected to the movable seat through and the end of the sliding rod facing the flat thin layer is connected to a trowel plate.

[0014] To achieve the above objectives, another technical solution adopted in this application is: a method for using a high-barrier polyester composite food packaging material production equipment, comprising the following steps:

[0015] S1: The rolled flat sheet is placed on the placement rack, and then one end of the sheet to be flattened is overlapped in an S-shape on the first, second, and third guide rollers. Finally, the rolled flat sheet is stretched and conveyed by the conveyor rollers. During the conveying process, the flat sheet will be located between the push rod and the trowel plate.

[0016] S2: After the servo motor is started, it drives the first worm and the second worm to rotate back and forth. The meshing first and second worm wheels can be driven by the servo motor to rotate. When the first worm wheel rotates, it drives the pulley to rotate, and the pulley can drive the transmission belt to rotate. A fixed seat is installed on the transmission belt. When the fixed seat moves to the rack position, the gear on the fixed seat can mesh with the rack. As the transmission belt rotates, the gear will move along the rack, and the fixed seat can rotate. At this time, the lever will make a circular motion, thereby pushing away the wrinkles of the flat thin layer;

[0017] S3: While the lever pushes away the wrinkles, the lead screw will be driven by the servo motor to rotate, and the moving seat on the lead screw will reciprocate along the lead screw. During the movement, the squeegee will contact the flat layer. In conjunction with the lever, the squeegee will be able to flatten the scattered wrinkles during the movement, thereby ensuring that the flat layer is unfolded during the conveying process and can be fully printed.

[0018] Compared with the prior art, the present invention has the following advantages:

[0019] The present invention relates to a production device and method for high-barrier polyester composite food packaging material. By installing a bracket on a packaging machine, a first guide roller, a second guide roller and a third guide roller can be installed on the bracket, and a flat thin layer can first pass through the first guide roller, the second guide roller and the third guide roller. When passing through the second guide roller and the third guide roller, the flat thin layer will be located between a trowel plate and a shifting rod. As the flat thin layer is conveyed, a servo motor can be started, a first worm can drive a first worm gear, a second worm can drive a second worm gear, a transmission belt can drive a fixed seat to move toward a rack position, a gear on the fixed seat can mesh with the rack, and the shifting rod can be rotated, thereby spreading out wrinkles of the flat thin layer. At this time, the trowel plate will follow the movable seat and move along the screw rod, and the trowel plate can flatten the three wrinkles, so that the flat thin layer becomes flat when conveyed, and no dead angle is left when the flat thin layer is conveyed and printed, thereby improving product quality.

[0020] The invention relates to a production device and method for high-barrier polyester composite food packaging material. The vertical frame can be fixed by setting a bracket. The vertical frame is provided with a horizontal platform, the vertical platform can be installed on the horizontal platform, and the rack can be welded on the vertical platform. When the transmission belt drives the fixed seat to rotate, the gear on the fixed seat will move to the rack position, thereby realizing the meshing of the gear and the rack. When the rack gear is meshed with the rack, the transmission belt is in a horizontal path, and the gear will not be dislocated from the rack, thereby ensuring the rotation of the shifting rod and the spreading of the flat thin layer. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The overall structure of the present invention is shown in FIG. Figure 1 .

[0022] Figure 2 The overall structure of the present invention is shown in FIG. Figure 2 .

[0023] Figure 3 Schematic diagram of the connection of the servo motor in the present invention.

[0024] Figure 4 Schematic diagram of the structure of the shift lever in the present invention.

[0025] Figure 5 It is a structural schematic diagram of the screw rod in the present invention.

[0026] Figure 6 Schematic diagram of the structure of the rack in the present invention.

[0027] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure of area A in the middle.

[0028] In the figure: 1. Packaging machine; 2. Controller; 3. Conveyor roller; 4. Placement rack; 5. Bracket; 6. First guide roller; 7. Second guide roller; 8. Third guide roller; 9. Vertical frame; 10. Servo motor; 11. First worm; 12. Linkage rod; 13. Second worm; 14. First worm gear; 15. Second worm gear; 16. Horizontal platform; 17. Rubber ball; 18. Push rod; 19. Limit rod; 20. Screw plate; 21. Moving seat; 22. Sliding rod; 23. Screw; 24. Rack; 25. Pulley; 26. Transmission belt; 27. Vertical platform; 28. Fixed seat; 29. ​​Gear. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0030] like Figures 1 to 7As shown, the present invention provides a high-barrier polyester composite food packaging material production equipment, including a packaging machine 1, a controller 2, a conveyor roller 3 and a placement rack 4. A bracket 5 is provided in the packaging machine 1 between the placement rack 4 and the conveyor roller 3. The bracket 5 is rotatably connected to the first guide roller 6, the second guide roller 7 and the third guide roller 8. A vertical frame 9 is provided on the bracket 5 between the second guide roller 7 and the third guide roller 8. The vertical frame 9 is rotatably provided with a screw rod 23, and a trowel plate 20 is provided on the screw rod 23. A transmission belt 26 is provided on the vertical frame 9 below the screw rod 23. A shift rod 18 is rotatably connected to the transmission belt 26, and a rubber ball 17 is provided on the output end of the shift rod 18. The rolled flat sheet is placed on the packaging machine 1, and then the flat sheet passes through the first guide roller 6, the second guide roller 7 and the third guide roller 8, and is finally transported by the conveying roller 3. When the flat sheet passes through the second guide roller 7 and the third guide roller 8, it is located between the trowel plate 20 and the shifting rod 18. During the transportation of the flat sheet, it will be moved by the shifting rod 18, and the wrinkles will be spread out. Then, it will be pushed by the trowel plate 20 to achieve flatness of the flat sheet, so that no four corners will appear during printing, thereby improving production quality.

[0031] The installation height of the first guide roller 6 is lower than the placement height of the placement rack 4. The installation heights of the second guide roller 7 and the third guide roller 8 are higher than the installation height of the first guide roller 6. The second guide roller 7 and the third guide roller 8 are of the same height. The installation heights of the second guide roller 7 and the third guide roller 8 are lower than the conveying position of the conveyor roller 3. The flat sheet will be S-shaped when passing through the first guide roller 6 and the second guide roller 7, thereby reducing the conveying speed. The flat sheet can be supported by the second guide roller 7 and the third guide roller 8, thereby ensuring that the shifting rod 18 and the trowel plate 20 can contact the flat sheet.

[0032] A horizontal platform 16 is provided on the vertical frame 9, and is arranged along the length of the bracket 5. The horizontal platform 16 and the vertical frame 9 are arranged in a T-shape as a whole. A vertical platform 27 is provided on the horizontal platform 16, and the vertical platform 27 and the horizontal platform 16 are arranged in a T-shape as a whole. The vertical platform 27 is rotatably connected to the pulley 25, and the pulleys 25 are respectively located at both ends of the vertical platform 27. The arrangement of the horizontal platform 16 can achieve the fixation of the vertical platform 27, and the pulley 25 can be installed on the vertical platform 27, thereby ensuring that the pulley 25 can drive the transmission belt 26 to move.

[0033] During implementation, by installing the bracket 5 on the packaging machine 1, the first guide roller 6, the second guide roller 7 and the third guide roller 8 can be installed on the bracket 5, and the flat thin layer can first pass through the first guide roller 6, the second guide roller 7 and the third guide roller 8. When passing through the second guide roller 7 and the third guide roller 8, the flat thin layer will be located between the screed plate 20 and the shift rod 18. As the flat thin layer is conveyed, the servo motor 10 can be started, the first worm 11 can drive the first worm gear 14, the second worm 13 can drive the second worm gear 15, and the transmission belt 26 can drive the fixed seat 28 to move toward the position of the rack 24. The gear 29 on the fixed seat 28 can engage with the rack 24, and the shift rod 18 can be rotated, thereby spreading out the wrinkles of the flat thin layer. At this time, the screed plate 20 will follow the movable seat 21 and move along the screw 23. The screed plate 20 can flatten the three wrinkles, so that the flat thin layer becomes flat during transportation, and the flat thin layer can be fully transported and printed without leaving any dead angles, thereby improving product quality.

[0034] A transmission belt 26 is sleeved on the pulley 25 of the stand 27. A fixed seat 28 is rotatably connected to the transmission belt 26. The top of the fixed seat 28 is welded to the shift lever 18. The fixed seat 28 is provided with a gear 29, which is meshed with a rack 24. The rack 24 is provided on the stand 27 and arranged along the length of the stand 27. By installing the rotating fixed seat 28 on the transmission belt 26, the fixed seat 28 moves to the position of the rack 24 after following the movement of the transmission belt 26, so that the gear 29 on the fixed seat 28 engages with the rack 24, ensuring that the fixed seat 28 can rotate when passing the position of the rack 24, ultimately realizing the rotation of the shift lever 18.

[0035] The pulley 25 on the stand 27 is provided with a first worm gear 14, which is meshedly connected to a first worm 11. The first worm 11 is provided at the output end of the servo motor 10. A linkage rod 12 is provided on the first worm 11, and a second worm 13 is provided at the top end of the linkage rod 12. The first worm 11 and the second worm 13 are provided coaxially. The servo motor 10 can drive the first worm 11 and the second worm 13 to rotate, thereby simultaneously controlling the rotation of the first worm gear 14 and the second worm gear 15.

[0036] A limit rod 19 is fixedly connected to the vertical frame 9 and arranged along the length of the horizontal platform 16. The limit rod 19 is arranged parallel to the screw rod 23 and has the same length as the screw rod 23. The diameter of the limit rod 19 is smaller than that of the screw rod 23. A second worm is provided at the input end of the limit rod 19. The limit rod 19 can limit the movement of the movable seat 21. When the movable seat 21 moves along the screw rod 23, it will not rotate with the screw rod 23, thereby ensuring that the movable seat 21 can move along the screw rod 23.

[0037] The second worm gear 15 is meshed with the second worm 13 and is arranged crosswise with the first worm gear 14. The second worm gear 15 is located above the first worm gear 14. The different installation positions of the first and second worm gears 14, 15 can avoid mutual restriction of motion trajectories.

[0038] The movable seat 21 is arranged in a rectangular shape as a whole, and is respectively penetrated with a screw rod 23 and a limiting rod 19, and the screw rod 23 is threadedly connected on the movable seat 21. Just can drive the trowel plate 20 to move by the movable seat 21.

[0039] The movable base 21 is slidably connected to a slide rod 22. The slide rod 22 is arranged in a T-shape. The slide rod 22 is connected to the movable base 21. The end of the slide rod 22 facing the flat layer is connected to the trowel plate 20. Due to the arrangement of the slide rod 22, when the slide rod 22 slides on the movable base 21, it can change its position according to the position of the flat layer, thereby ensuring that the trowel plate 20 is in contact with the flat layer.

[0040] During implementation, the vertical frame 9 can be fixed by setting the bracket 5. The vertical frame 9 is provided with a horizontal platform 16, and the vertical platform 27 can be installed on the horizontal platform 16. The rack 24 can be welded on the vertical platform 27. When the transmission belt 26 drives the fixed seat 28 to rotate, the gear 29 on the fixed seat 28 will move to the position of the rack 24, thereby realizing the engagement of the gear 29 with the rack 24. When the rack 24 gear 29 is engaged with the rack 24, the transmission belt 26 is in a horizontal path, and the gear 29 will not be dislocated from the rack 24, thereby ensuring the rotation of the shift rod 18 and ensuring the spreading of the flat thin layer.

[0041] like Figure 1-7 As shown, a method for using a high-barrier polyester composite food packaging material production device comprises the following steps:

[0042] S1: The rolled flat sheet is placed on the placement rack 4, and then one end of the sheet to be flattened is overlapped in an S-shape on the first guide roller 6, the second guide roller 7, and the third guide roller 8. Finally, the rolled flat sheet is stretched and conveyed by the conveying roller 3. During the conveying process, the flat sheet is located between the shifting rod 18 and the trowel plate 20;

[0043] S2: After the servo motor 10 is started, the servo motor 10 drives the first worm 11 and the second worm 13 to rotate back and forth, and the meshing first worm gear 14 and the second worm gear 15 can be driven by the servo motor 10 to rotate. When the first worm gear 14 rotates, it drives the pulley 25 to rotate, and the pulley 25 can drive the transmission belt 26 to rotate. A fixed seat 28 is installed on the transmission belt 26. When the fixed seat 28 moves to the position of the rack 24, the gear 29 on the fixed seat 28 can mesh with the rack 24. As the transmission belt 26 rotates, the gear 29 moves along the rack 24, and the fixed seat 28 can rotate. At this time, the shifting rod 18 will make a circular motion, thereby shifting the wrinkles of the flat thin layer;

[0044] S3: While the lever 18 pushes away the wrinkles, the screw 23 will be driven by the servo motor 10 to rotate, and the movable seat 21 on the screw 23 will reciprocate along the screw 23. During the movement, the trowel plate 20 will contact the flat thin layer. In conjunction with the lever 18, the trowel plate 20 can flatten the scattered wrinkles during the movement, thereby ensuring that the flat thin layer is unfolded during the transportation process, so that it can be fully printed.

[0045] The working principle of the present invention is as follows: by installing a bracket 5 on the packaging machine 1, the first guide roller 6, the second guide roller 7 and the third guide roller 8 can be installed on the bracket 5, and the flat thin layer can first pass through the first guide roller 6, the second guide roller 7 and the third guide roller 8. When passing through the second guide roller 7 and the third guide roller 8, the flat thin layer will be located between the trowel plate 20 and the shift rod 18. As the flat thin layer is conveyed, the servo motor 10 can be started, the first worm 11 can drive the first worm gear 14, the second worm 13 can drive the second worm gear 15, and the transmission belt 26 can drive the fixed seat 28 to move to the position of the rack 24. The gear 29 on the fixed seat 28 can engage with the rack 24, and the shift rod 18 can be rotated, thereby spreading the wrinkles of the flat thin layer. At this time, the trowel plate 20 will follow The movable seat 21 moves along the screw rod 23, and the trowel plate 20 can flatten the three wrinkles, so that the flat thin layer becomes flat when conveyed, and the flat thin layer can be conveyed and printed without leaving any dead angle, thereby improving product quality. The vertical frame 9 can be fixed by setting the bracket 5. The vertical frame 9 is provided with a horizontal platform 16, and the vertical platform 27 can be installed on the horizontal platform 16. The rack 24 can be welded on the vertical platform 27. When the transmission belt 26 drives the fixed seat 28 to rotate, the gear 29 on the fixed seat 28 will move to the rack 24 position, thereby realizing the engagement of the gear 29 with the rack 24. When the rack 24 gear 29 is engaged with the rack 24, the transmission belt 26 is in a horizontal path, and the gear 29 will not be dislocated from the rack 24, thereby ensuring the rotation of the shift rod 18 and ensuring the spreading of the flat thin layer.

[0046] The above describes the basic principles, main features, and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-described embodiments. The above-described embodiments and the specification merely illustrate the principles of the present application. Various changes and improvements may be made to the present application without departing from the spirit and scope of the present application. These changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A production device for high-barrier polyester composite food packaging material, comprising a packaging machine (1), a controller (2), a conveying roller (3) and a placement rack (4), characterized in that: A bracket (5) is provided in the packaging machine (1) between the placement rack (4) and the conveying roller (3), and a first guide roller (6), a second guide roller (7) and a third guide roller (8) are rotatably connected to the bracket (5). A vertical frame (9) is provided on the bracket (5) between the second guide roller (7) and the third guide roller (8), and a screw rod (23) is provided on the vertical frame (9). A trowel (20) is provided on the screw rod (23). A transmission belt (26) is provided on the vertical frame (9) below the screw rod (23), and a shifting rod (18) is rotatably connected to the transmission belt (26). A rubber ball (17) is provided on the output end of the shifting rod (18).

2. The high barrier polyester composite food packaging material production equipment according to claim 1, characterized in that: The installation height of the first guide roller (6) is lower than the placement height of the placement rack (4), the installation heights of the second guide roller (7) and the third guide roller (8) are higher than the installation height of the first guide roller (6), the heights of the second guide roller (7) and the third guide roller (8) are the same, and the installation heights of the second guide roller (7) and the third guide roller (8) are lower than the conveying position of the conveying roller (3).

3. The high barrier polyester composite food packaging material production equipment according to claim 1, characterized in that: A horizontal platform (16) is provided on the vertical frame (9), and the horizontal platform (16) is arranged along the length of the bracket (5). The horizontal platform (16) and the vertical frame (9) are arranged in a T-shape as a whole. A vertical platform (27) is provided on the horizontal platform (16), and the vertical platform (27) and the horizontal platform (16) are arranged in a T-shape as a whole. A pulley (25) is rotatably connected to the vertical platform (27), and the pulley (25) is respectively located at both ends of the vertical platform (27).

4. The high barrier polyester composite food packaging material production equipment according to claim 3, characterized in that: A transmission belt (26) is sleeved on the pulley (25) of the stand (27), and a fixed seat (28) is rotatably connected to the transmission belt (26). A shift rod (18) is welded to the top of the fixed seat (28), and a gear (29) is provided on the fixed seat (28). The gear (29) is meshed with a rack (24), and the rack (24) is provided on the stand (27). The rack (24) is arranged along the length of the stand (27).

5. The high barrier polyester composite food packaging material production equipment according to claim 4, characterized in that: A first worm gear (14) is provided on the pulley (25) on the stand (27), the first worm gear (14) is meshedly connected with a first worm (11), the first worm (11) is arranged on the output end of the servo motor (10), a linkage rod (12) is installed on the first worm (11), a second worm (13) is installed at the top position of the linkage rod (12), and the first worm (11) and the second worm (13) are coaxially arranged.

6. The high barrier polyester composite food packaging material production equipment according to claim 1, characterized in that: A limiting rod (19) is fixedly connected to the vertical frame (9), and the limiting rod (19) is arranged along the length of the horizontal platform (16). The limiting rod (19) and the screw rod (23) are arranged in parallel with each other. The limiting rod (19) and the screw rod (23) have the same length, and the diameter of the limiting rod (19) is smaller than the diameter of the screw rod (23). A second worm gear (15) is provided on the input end of the limiting rod (19).

7. The high barrier polyester composite food packaging material production equipment according to claim 6, characterized in that: The second worm gear (15) is meshingly connected with the second worm (13), the second worm gear (15) and the first worm gear (14) are arranged in a cross shape, and the second worm gear (15) is located above the first worm gear (14).

8. The high barrier polyester composite food packaging material production equipment according to claim 1, characterized in that: The movable seat (21) is arranged in a rectangular shape as a whole. A screw rod (23) and a limit rod (19) are respectively connected to the movable seat (21). The screw rod (23) is threadedly connected to the movable seat (21).

9. The high barrier polyester composite food packaging material production equipment according to claim 8, characterized in that: The movable seat (21) is slidably connected to a slide rod (22), the slide rod (22) being arranged in a T-shape as a whole, and the slide rod (22) is connected to the movable seat (21), and the end of the slide rod (22) facing the flat layer is connected to a trowel plate (20).

10. A method for using a production device for high-barrier polyester composite food packaging material, applied to the production device according to any one of claims 1 to 9, characterized in that: The following steps are involved: S1: The rolled flat sheet is placed on the placement rack (4), and then one end of the sheet to be flattened is overlapped in an S-shape on the first guide roller (6), the second guide roller (7) and the third guide roller (8), and finally the rolled flat sheet is stretched and transported by the conveying roller (3). During the transportation process, the flat sheet is located between the shifting rod (18) and the screed plate (20); S2: After the servo motor (10) is started, the servo motor (10) drives the first worm (11) and the second worm (13) to rotate back and forth, and the meshing first worm wheel (14) and the second worm wheel (15) can be driven by the servo motor (10) to rotate. When the first worm wheel (14) rotates, it drives the pulley (25) to rotate, and the pulley (25) can drive the transmission belt (26) to rotate. A fixed seat (28) is installed on the transmission belt (26). When the fixed seat (28) moves to the position of the rack (24), the gear (29) on the fixed seat (28) can mesh with the rack (24). As the transmission belt (26) rotates, the gear (29) moves along the rack (24), and the fixed seat (28) can rotate. At this time, the lever (18) will make a circular motion, thereby pushing away the wrinkles of the flat thin layer; S3: When the lever (18) pushes the wrinkles apart, the screw (23) is driven by the servo motor (10) to rotate, and the movable seat (21) on the screw (23) moves back and forth along the screw (23). During the movement, the squeegee (20) contacts the flat layer. In conjunction with the lever (18), the squeegee (20) can push the scattered wrinkles flat during the movement, thereby ensuring that the flat layer is unfolded during the conveying process, so that a full printing is obtained.

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