PLA coated paper production equipment

Abstract

The utility model discloses PLA (polylactic acid) coated paper production equipment, which belongs to the technical field of coated paper production and comprises a coated workbench, a paper releasing roller is arranged at one end of the coated workbench, a paper collecting roller is arranged at the other end of the coated workbench, and a straightening mechanism is arranged below the paper collecting roller and comprises a lifting paper collecting frame and a brake component. The lifting paper collecting frame is slidably connected into a sliding way of the film spraying workbench, the brake assembly is arranged on one side of the straightening mechanism, and the brake assembly comprises a brake rotating arm, a brake rotating shaft and a horizontal supporting plate; according to the utility model, by arranging the straightening mechanism, before lamination processing, the lifting air cylinder controls the lifting paper collecting frame to descend and is linked with the brake assembly, so that the brake gasket extrudes the shaft neck of the paper placing roller and limits the rotation of the paper placing roller, and meanwhile, the paper collecting roller applies small tensile force to paper, so that the paper is flatly laid on the workbench in a limited manner, and a stable base material is provided for a lamination process; and the film spraying quality is ensured.

Description

Technical Field

[0001] This utility model relates to the field of coated paper production technology, specifically to a PLA coated paper production equipment. Background Technology

[0002] With increasing environmental awareness, PLA (polylactic acid), as a biodegradable and environmentally friendly material, has been widely used in the packaging field. PLA-coated paper, as a new type of packaging material that combines PLA material with paper, has both the flexibility and printability of paper and the waterproof, oil-proof and biodegradable properties of PLA material. Therefore, it has huge market potential in many fields such as food packaging and pharmaceutical packaging.

[0003] Traditional PLA coated paper production equipment often struggles to meet the demands of high-quality production due to inadequate paper transport and placement methods. Uneven tension during traction transport can lead to wrinkles and misalignment when directly placed on the coating worktable. Wrinkles and misalignment during coating can result in uneven coating in subsequent extrusion processes. To ensure coating quality, manual straightening and positioning of the paper before coating is cumbersome. Furthermore, the flush-mounted feed and take-up rollers cause direct contact between the paper and the worktable surface during transport, increasing the risk of abnormal friction and further exacerbating wrinkles and stretching. This can also scratch the paper surface, affecting the product's appearance. Therefore, a PLA coated paper production equipment is needed to address these problems in existing technologies. Utility Model Content

[0004] The purpose of this invention is to provide a PLA coated paper production equipment to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a PLA coated paper production equipment, comprising a coating worktable, a paper feeding roller at one end of the coating worktable, a paper receiving roller at the other end of the coating worktable, a straightening mechanism below the paper receiving roller, the straightening mechanism comprising a lifting paper receiving frame and a brake assembly, the lifting paper receiving frame being slidably connected in a slide rail of the coating worktable, the brake assembly being disposed on one side of the straightening mechanism, the brake assembly comprising a brake arm, a brake shaft, and a horizontal support plate, the brake shaft being fixed on the front surface of the coating worktable near the paper receiving roller, the off-center portion of the brake arm being rotatably connected to the brake shaft, and the horizontal support plate being fixed to one end of the brake arm.

[0006] Preferably, the other end of the brake arm is fixed with a hinged frame, and a hinged seat is fixed on one side surface of the straightening mechanism, with the hinged frame hinged inside the hinged seat.

[0007] Preferably, a brake pad is fixed to the upper end of the horizontal support plate, and the brake pad is disposed below the journal of the paper feeding roller.

[0008] Preferably, a lifting cylinder is fixed at one end of the coating worktable, and the output end of the lifting cylinder is fixed at the lower part of the lifting paper receiving rack.

[0009] Preferably, a paper feeding frame is fixed to one end face of the coating worktable, the paper feeding roller is rotatably connected to the paper feeding frame, and the paper receiving roller is rotatably connected to the lifting paper receiving frame.

[0010] Preferably, a drive motor is fixed on one side surface of the lifting paper receiving rack, a snap-fit ​​groove is provided at one end of the paper receiving roller, a snap-fit ​​protrusion is provided on the output shaft of the drive motor, the snap-fit ​​protrusion engages and matches with the snap-fit ​​groove, and anti-deviation baffles are fixed on the front and rear edges of the coating worktable.

[0011] This utility model provides a PLA coated paper production equipment, which has the following advantages compared with the prior art:

[0012] Beneficial effects:

[0013] Before the coating process, the lifting take-up rack is lowered by the lifting cylinder through the straightening mechanism. This is linked to the brake assembly, which causes the brake pads to squeeze the paper feed roller journal, restricting the rotation of the paper feed roller. At the same time, the take-up roller applies a small pulling force to the paper, so that the paper is laid flat and in a limited position on the worktable, providing a stable substrate for the coating process and ensuring the coating quality.

[0014] By using a lifting take-up rack, which is raised by a lifting cylinder, the take-up roller is positioned higher than the unload roller. Gravity assists in paper transport, reducing the load on the traction device and preventing wrinkles, stretching, or tearing of the paper due to uneven force during transport. This effectively ensures the flatness and integrity of thin or easily deformable paper. In addition, the suspended transport of the paper creates space below, promoting air circulation and assisting in the cooling process after lamination. This allows the PLA film to cure more evenly and fully, improving the quality of PLA laminated paper products. Attached Figure Description

[0015] Figure 1 This is a perspective view of the overall structure of this utility model;

[0016] Figure 2 This is a three-dimensional view of the brake assembly structure of this utility model;

[0017] Figure 3 This is a perspective view of the brake swing arm structure of this utility model;

[0018] Figure 4 This is a three-dimensional view of the paper receiving roller structure of this utility model.

[0019] In the diagram: 1. Coating worktable; 2. Anti-deviation baffle; 3. Paper feeder; 4. Paper feed roller; 5. Straightening mechanism; 6. Paper take-up roller; 7. Drive motor; 8. Snap-fit ​​protrusion; 9. Snap-fit ​​groove; 10. Lifting paper take-up rack; 11. Lifting cylinder; 12. Brake assembly; 13. Brake swing arm; 14. Brake shaft; 15. Hinge seat; 16. Hinge frame; 17. Horizontal support plate; 18. Brake pad. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1-4 This utility model provides a PLA coated paper production equipment, including a coating worktable 1. A paper feeding roller 4 is provided at one end of the coating worktable 1, and a paper receiving roller 6 is provided at the other end of the coating worktable 1. A straightening mechanism 5 is provided below the paper receiving roller 6. The straightening mechanism 5 includes a lifting paper receiving frame 10 and a brake assembly 12. The lifting paper receiving frame 10 is slidably connected in the slide of the coating worktable 1. The brake assembly 12 is provided on one side of the straightening mechanism 5. The main function of the straightening mechanism 5 is to ensure the flatness and stability of the paper during the paper laying process on the worktable, and to prevent the paper from wrinkling, stretching or tearing.

[0022] Further as Figure 1 , Figure 2 and Figure 3 As shown, it is worth noting that the brake assembly 12 includes a brake rotating arm 13, a brake rotating shaft 14, and a horizontal support plate 17. The brake rotating shaft 14 is fixed on the front surface of the coating worktable 1 near the receiving roller 6. The off-center part of the brake rotating arm 13 is rotatably connected to the brake rotating shaft 14. The horizontal support plate 17 is fixed to one end of the brake rotating arm 13. The other end of the brake rotating arm 13 is fixed with a hinged rotating frame 16. A hinged seat 15 is fixed on one side surface of the straightening mechanism 5. The hinged rotating frame 16 is hinged inside the hinged seat 15. A brake pad 18 is fixed at the upper end of the horizontal support plate 17. The brake pad 18 is located below the journal of the paper feeding roller 4. The brake assembly 12 is installed on one side of the straightening mechanism 5 and is used to control the rotation of the paper feeding roller 4. When the lifting paper receiving rack 10 descends, the rotation of the brake arm 13 causes the brake pad 18 on the horizontal support plate 17 to press against the journal of the paper feeding roller 4, thus restricting the rotation of the paper feeding roller 4 and thereby controlling the paper feeding process.

[0023] Further as Figure 1 , Figure 2 and Figure 4 As shown, it is worth noting that a lifting cylinder 11 is fixed to one end of the coating worktable 1. The output end of the lifting cylinder 11 is fixed to the lower part of the lifting take-up rack 10. The lifting take-up rack 10 is slidably connected in the slide rail of the coating worktable 1 and can move up and down under the drive of the lifting cylinder 11. When rising, it creates a height difference between the take-up roller 6 and the unload roller 4, using gravity to assist in paper transfer; when descending, it drives the brake assembly 12 to work, and at the same time, it causes the take-up roller 6 to apply tension to the paper, ensuring that the paper is laid flat on the coating worktable.

[0024] Further as Figure 4 As shown, it is worth noting that a paper feeding rack 3 is fixed to one end face of the coating worktable 1, the paper feeding roller 4 is rotatably connected to the paper feeding rack 3, the paper receiving roller 6 is rotatably connected to the lifting paper receiving rack 10, a drive motor 7 is fixed to one side surface of the lifting paper receiving rack 10, a snap-fit ​​groove 9 is provided at one end of the paper receiving roller 6, a snap-fit ​​protrusion 8 is provided on the output shaft of the drive motor 7, the snap-fit ​​protrusion 8 engages and matches with the snap-fit ​​groove 9, and anti-deviation baffles 2 are fixed to the front and rear edges of the coating worktable 1.

[0025] This solution has the following working process: Before use, the lifting cylinder 11 is turned on, which drives the lifting paper take-up rack 10 to rise, so that the take-up roller 6 and the release roller 4 have a height difference. The paper has a natural downward tendency under the action of gravity. The take-up roller 6 is higher than the release roller 4, which allows the paper to move more smoothly from the release roller 4 to the take-up roller 6 with the help of gravity during the transmission process. The paper is suspended, which can prevent the risk of wrinkles, stretching or tearing caused by abnormal friction with the coating worktable 1 during the transmission process. Especially for thin or easily deformable paper, gravity assistance can better ensure its flatness and integrity. In addition, the suspension method creates a certain space under the paper transmission path, which is conducive to air circulation. Especially in the cooling stage after coating, it can assist the cooling process, so that the PLA film can be better cured and the product quality can be improved.

[0026] Before the coating process, the lifting cylinder 11 controls the lowering of the lifting take-up rack 10. The lowering of the lifting take-up rack 10 from the initial position will cause the brake arm 13 and the hinged end of the hinge seat 15 to lower. Since the brake arm 13 is rotatably connected to the brake shaft 14 of the coating worktable 1, the horizontal support plate 17 at the other end of the brake arm 13 will rise due to eccentric rotation. This causes the brake pad 18 on the horizontal support plate 17 to squeeze the journal of the paper feeding roller 4, thereby restricting the rotation of the paper feeding roller 4 to feed the paper. The lowering of the take-up roller 6 will apply a small pulling force to the paper placed on the coating worktable 1, so that the paper is laid on the coating worktable 1 in a wrinkle-free and limited state. This provides the conditions for the extruder's coating head to stably coat the PLA granules along the paper, thereby ensuring the coating quality of the PLA coated paper product.

[0027] PLA coated paper production equipment mainly includes unwinding device, extruder, coating head, cooling device, traction device, and winding device. Each device plays a different role in the unwinding, extrusion, coating, cooling, traction and winding production process.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Although embodiments of this utility model have been shown and described, this does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model. Regarding the embodiments of this utility model, those skilled in the art will understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. A PLA laminated paper production device comprising a laminating workbench (1), characterized in that: One end of the coating worktable (1) is provided with a paper feeding roller (4), and the other end of the coating worktable (1) is provided with a paper receiving roller (6). A straightening mechanism (5) is provided below the paper receiving roller (6). The straightening mechanism (5) includes a lifting paper receiving frame (10) and a brake assembly (12). The lifting paper receiving frame (10) is slidably connected in the slide of the coating worktable (1). The brake assembly (12) is located on one side of the straightening mechanism (5). The brake assembly (12) includes a brake rotating arm (13), a brake rotating shaft (14), and a horizontal support plate (17). The brake rotating shaft (14) is fixed on the front surface of the coating worktable (1) near the paper receiving roller (6). The off-center part of the brake rotating arm (13) is rotatably connected to the brake rotating shaft (14). The horizontal support plate (17) is fixed on one end of the brake rotating arm (13).

2. The PLA-coated paper production apparatus according to claim 1, wherein: The other end of the brake arm (13) is fixed with a hinged frame (16), and a hinged seat (15) is fixed on one side surface of the straightening mechanism (5). The hinged frame (16) is hinged inside the hinged seat (15).

3. The PLA-coated paper production apparatus according to claim 2, wherein: A brake pad (18) is fixed at the upper end of the horizontal support plate (17), and the brake pad (18) is located below the journal of the paper feeding roller (4).

4. The PLA-coated paper production apparatus according to claim 3, wherein: One end of the coating workbench (1) is fixed with a lifting cylinder (11), and the output end of the lifting cylinder (11) is fixed at the lower part of the lifting paper receiving rack (10).

5. The PLA-coated paper production apparatus according to claim 4, wherein: A paper feeding rack (3) is fixed to one end face of the coating worktable (1), the paper feeding roller (4) is rotatably connected to the paper feeding rack (3), and the paper receiving roller (6) is rotatably connected to the lifting paper receiving rack (10).

6. The PLA-coated paper production apparatus according to claim 5, wherein: A drive motor (7) is fixed on one side surface of the lifting paper receiving rack (10), a snap-fit ​​groove (9) is provided at one end of the paper receiving roller (6), a snap-fit ​​protrusion (8) is provided on the output shaft of the drive motor (7), the snap-fit ​​protrusion (8) engages and matches with the snap-fit ​​groove (9), and anti-deviation baffles (2) are fixed on the front and rear edges of the coating worktable (1).

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