A doctor blade assembly for coating a PET sheet

Abstract

The utility model relates to PET sheet material coating production equipment technical field discloses a scraper subassembly for PET sheet material coating, including conveying table, one side fixed connection of conveying table has the cylinder machine, the cylinder machine top fixed connection has a plurality of telescopic pneumatic cylinders, a plurality of telescopic pneumatic cylinder output fixed connection has scraper, the scraper outer wall is provided with blocking component, the blocking component includes a plurality of baffle, a plurality of baffle are located one side of scraper, the scraper inside is set up with the sliding slot, every baffle side all fixedly connected with connecting block, every connecting block all fixedly connected with connecting column inside, a plurality of connecting column sliding connection in the inner wall of sliding slot. In the utility model, through rotating handle and driving threaded rod to move, and then control the separation and engagement of clamping column and scraper groove, the convenient adjustment and stable fixed position of both sides baffle position are realized, effectively prevent the coating from flowing out from both sides.

Description

Technical Field

[0001] This utility model relates to the field of PET sheet coating production equipment, and in particular to a doctor blade assembly for PET sheet coating. Background Technology

[0002] In the PET sheet manufacturing and processing industry, coating is a crucial step in improving product functionality and surface quality. Its core lies in uniformly applying a specific coating to the surface of the PET sheet to meet the requirements of subsequent processing for indicators such as barrier properties, abrasion resistance, and aesthetics. The doctor blade assembly for PET sheet coating, as the core execution component of the coating system, directly determines the uniformity, thickness accuracy, and edge regularity of the coating, playing a decisive role in the final product quality. With the increasing demand for diverse PET sheet specifications from downstream industries such as electronics, packaging, and photovoltaics, and the significant differences in width requirements for PET sheets across different application scenarios, higher demands are placed on the adaptability and ease of adjustment of the doctor blade assembly. How to optimize the doctor blade assembly structure to achieve precise coating of PET sheets of different widths has become one of the urgent technical directions to be addressed in the industry.

[0003] Currently, most existing PET sheet coating doctor blade assemblies in the industry adopt a single fixed structure design. Their core components include only a rigid fixing bracket, an integrated doctor blade body, and multiple sets of fastening bolts for locking the doctor blade position. In terms of specific technical principles, this type of traditional doctor blade assembly rigidly attaches the doctor blade body directly to a pre-set installation position on the fixing bracket using fastening bolts, ensuring that the doctor blade maintains a fixed position and angle throughout the coating process.

[0004] Existing doctor blade assemblies for PET sheet coating lack width limiting structures, causing coating to easily overflow from both sides of the sheet during the coating process, resulting in a large amount of coating waste. Furthermore, the overflowing coating can contaminate the equipment and the edges of the sheet, leading to poor coating edge cleanliness and seriously affecting product quality stability. Therefore, a doctor blade assembly for PET sheet coating is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a doctor blade assembly for coating PET sheets, which aims to improve the problem that traditional equipment is difficult to adapt to sheets of different widths and is prone to paint waste.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A scraper assembly for coating PET sheets includes a conveyor table, a roller mill fixedly connected to one side of the conveyor table, a plurality of telescopic cylinders fixedly connected to the top of the roller mill, a scraper fixedly connected to the output end of the plurality of telescopic cylinders, and a blocking assembly provided on the outer wall of the scraper. The blocking assembly includes multiple baffles located on one side of the scraper. A groove is formed inside the scraper. A connecting block is fixedly connected to one side of each baffle. A connecting post is fixedly connected inside each connecting block. Multiple connecting posts are slidably connected to the inner wall of the groove. A positioning ring is fixedly connected to one end of each connecting post. A threaded rod is threadedly connected inside each connecting block. A locking post is fixedly connected to one end of each threaded rod. Multiple locking posts engage with a groove on one side of the scraper.

[0007] As a further description of the above technical solution: Each of the threaded rods has a handle fixedly connected to its other end, and the plurality of positioning rings are fitted against one side of the scraper. A collection assembly is provided on one side of the conveyor table.

[0008] As a further description of the above technical solution: The collection assembly includes a collection box, and a support plate is fixedly connected to one side of the conveyor platform, with the top of the support plate fitting against the bottom of the collection box.

[0009] As a further description of the above technical solution: Both sides of the collection box are fixedly connected to connecting plates, and one side of the conveyor table is fixedly connected to multiple fixing blocks.

[0010] As a further description of the above technical solution: Each of the fixed blocks is fixedly connected to a fixed shell, and each of the fixed shells is slidably connected to a transmission column and a locking block.

[0011] As a further description of the above technical solution: One end of each of the transmission columns is fixedly connected to one side of the locking block, and each of the locking blocks engages with the inside of the connecting plate.

[0012] As a further description of the above technical solution: Each of the transmission columns is provided with a spring on its outer wall. One end of each spring is fixedly connected to one side of the locking block, and the other end of each spring is fixedly connected to one side of the inner wall of the fixed shell.

[0013] As a further description of the above technical solution: Each of the transmission columns is rotatably connected to one end of a rotating bar, and each rotating bar is rotatably connected to a push plate on its outer wall. Each push plate is in contact with one side of the fixed block.

[0014] This utility model has the following beneficial effects: 1. In this utility model, by rotating the handle to drive the threaded rod to move, the separation and engagement of the locking post and the scraper groove are controlled, realizing convenient adjustment and stable positioning of the positions of the two side baffles. The baffles are used to precisely limit the coating width of the PET sheet, effectively preventing the coating from flowing out from both sides. This solves the problem that traditional equipment is difficult to adapt to sheets of different widths and is prone to coating waste, enhances the versatility and ease of operation of the equipment, and ensures the cleanliness of the coating edge and product quality.

[0015] 2. In this utility model, by pushing the push plate to rotate, the eccentrically set rotating bar drives the transmission column and the locking block to move, realizing the quick assembly and disassembly of the collection box. This allows the collection box to be set close to the conveyor table, solving the problem of paint splashing caused by the long distance of the traditional collection bucket. It achieves a good collection effect of excess paint, which not only reduces material waste and environmental pollution, but also facilitates the recycling and reuse of paint, improving the overall working efficiency and economic benefits of the equipment. Attached Figure Description

[0016] Figure 1 This is a three-dimensional schematic diagram of a doctor blade assembly for coating PET sheets according to the present invention. Figure 2 This is a schematic diagram of the baffle structure of a doctor blade assembly for coating PET sheets according to the present invention; Figure 3 This is a schematic diagram of the positioning ring structure of a doctor blade assembly for coating PET sheets according to the present invention; Figure 4 This is a schematic diagram of the threaded rod structure of a doctor blade assembly for coating PET sheets according to the present invention; Figure 5 for Figure 1 Enlarged structural diagram at point A in the diagram; Figure 6 This is a schematic diagram of the card block structure of a doctor blade assembly for coating PET sheets proposed in this utility model.

[0017] Legend: 1. Conveyor table; 2. Roller conveyor; 3. Telescopic cylinder; 4. Scraper; 5. Connecting block; 6. Connecting column; 7. Positioning ring; 8. Threaded rod; 9. Clamping column; 10. Handle; 11. Baffle; 12. Slide chute; 13. Collection box; 14. Support plate; 15. Connecting plate; 16. Fixing block; 17. Fixing shell; 18. Transmission column; 19. Rotary bar; 20. Push plate; 21. Spring; 22. Clamping block. Detailed Implementation

[0018] 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.

[0019] Reference Figures 1-4 This utility model provides an embodiment of a PET sheet coating scraper assembly, including a conveyor table 1. A roller mill 2 is fixedly connected to one side of the conveyor table 1. The conveyor table 1 is used to carry and convey PET sheets, providing a stable moving platform for the coating process and ensuring the continuity and uniformity of the coating. The roller mill 2 is equipped with a motor to drive the conveyor table 1 to reciprocate, realizing automatic feeding and recycling of the fabric. Multiple telescopic cylinders 3 are fixedly connected to the top of the roller mill 2. The telescopic cylinders 3, which can be selected from the CDQ2B series, work with an external air source to telescopically move, thereby driving the scraper 4 to move up and down, achieving the effect of precisely controlling the distance between the scraper 4 and the fabric. The output ends of the multiple telescopic cylinders 3 are fixedly connected to scrapers 4 made of 304 stainless steel. The scraper 4 is used to uniformly coat the coating on the surface of the PET sheet, forming a coating of uniform thickness. A blocking component is provided on the outer wall of the scraper 4. The blocking component is used to adjust the coating width and prevent the coating from overflowing, realizing the adaptive processing of sheets of different specifications. The blocking assembly includes multiple baffles 11 located on one side of the scraper 4. The baffles 11 directly block the coating, limiting the width of the coating area and effectively preventing coating from flowing out from both sides of the fabric, ensuring cleanliness during production. The scraper 4 has a sliding groove 12 inside, providing a guide track for the movement of the connecting column 6, ensuring that the baffles 11 can slide smoothly left and right during adjustment. Each baffle 11 has a connecting block 5 fixedly connected to one side. The connecting block 5 connects the baffle 11 and serves as the mounting base for the threaded rod 8, supporting the entire adjustment and locking mechanism. Each connecting block 5 has a connecting column 6 fixedly connected inside. The multiple connecting columns 6 are slidably connected to the inner wall of the sliding groove 12, sliding in conjunction with the inner wall of the sliding groove 12, allowing the baffles 11 to be easily pushed to adjust the spacing. Each connecting column 6 has a positioning ring 7 fixedly connected to one end, used to limit... The axial movement range of the connecting column 6 is limited to prevent it from dislodging from the slide 12, thus increasing structural stability. Each connecting block 5 has a threaded rod 8 internally connected to it. One end of each threaded rod 8 is fixedly connected to a locking post 9 made of hard alloy. The locking post 9 is used to lock into the groove of the scraper 4, achieving rigid fixation of the position of the baffle 11 and ensuring that the baffle 11 will not shift due to external force during the coating process. Multiple locking posts 9 engage with the groove on one side of the scraper 4. The other end of each threaded rod 8 is fixedly connected to a handle 10. The handle 10 rotates in conjunction with the threaded rod 8, while the threaded rod 8 moves spirally inside the connecting block 5, thereby driving the locking post 9 to move to achieve the effect of locking or releasing. Multiple positioning rings 7 are attached to one side of the scraper 4. A collection component is provided on one side of the conveyor table 1. This collection component is used to collect excess paint on the conveyor belt after the operation is completed, realizing the recycling of materials and reducing waste.

[0020] Reference Figure 1 , Figure 5 and Figure 6The collection assembly includes a collection box 13, which can be made of SUS316 stainless steel. The collection box 13 is used to hold excess paint recovered from the conveyor table 1. Its detachable design greatly facilitates paint transfer and cleanup. A support plate 14 is fixedly connected to one side of the conveyor table 1. The support plate 14 supports the weight of the collection box 13, providing a stable and reliable placement platform. The top of the support plate 14 fits against the bottom of the collection box 13. Connecting plates 15 are fixedly connected to both sides of the collection box 13. Multiple fixing blocks 16 are fixedly connected to one side of the conveyor table 1. The fixing blocks 16 serve as fixed bases for installing components of the quick-release mechanism, such as the fixing shell 17 and the push plate 20. Each fixing block 16 has a fixing shell 17 fixedly connected inside. The fixing shell 17 provides internal space and guidance for the movement of the drive column 18, spring 21, and locking block 22. Each fixing shell 17 has a drive column 18 and a locking block 22 slidably connected inside. One end of each drive column 18 is fixedly connected to one side of the locking block 22. The drive column 18, in conjunction with the locking block 22, performs linear reciprocating motion. This system converts the rotational motion of the push plate 20 into the locking and unlocking motion of the locking blocks 22. Each locking block 22 engages with the inside of the connecting plate 15, which has a slot. The engagement or disengagement of the locking blocks 22 allows for quick attachment or removal of the collection box 13 to the equipment. Each transmission column 18 has a spring 21 made of piano wire on its outer wall. One end of each spring 21 is fixedly connected to one side of the locking block 22, and the other end is fixedly connected to one side of the inner wall of the fixing shell 17. Spring 21 is used to provide reset force. After the push plate 20 is reset, spring 21 releases energy to push the transmission column 18 and the locking block 22 to lock automatically, which simplifies the operation. Each transmission column 18 has a rotating bar 19 rotatably connected to one end. Each rotating bar 19 has a push plate 20 rotatably connected to its outer wall. The push plate 20 rotates in conjunction with the eccentrically set rotating bar 19 on it, which achieves the effect of converting a small angle of rotation into a large linear displacement of the transmission column 18. It is a force-saving lever design. Each push plate 20 is in contact with one side of the fixed block 16.

[0021] Working principle: During equipment use, rotate handle 10 to make threaded rod 8 rotate and move inside connecting block 5 until the locking post 9 is removed from the groove on one side of scraper 4. Next, push the two side baffles 11 to move, so that connecting post 6 slides inside slide groove 12. When the distance between the two side baffles 11 is consistent with the length of PET sheet coating, according to the same principle, the locking post 9 is re-locked into the inner wall of the groove on one side of scraper 4, thereby fixing the position of baffle 11. The two side baffles 11 block the two sides of the fabric to prevent the coating from flowing out from the two sides of the fabric. After the equipment is used up, the conveyor 1 is started in reverse to collect excess paint into the collection box 13. Next, the push plate 20 is rotated 90 degrees. Since the rotating bar 19 is located on one side of the center point of the push plate 20, the locking block 22 at one end of the transmission column 18 will slide out from the inside of the connecting plate 15 through the rotating bar 19, and the spring 21 will be compressed. When the connecting plate 15 loses the locking effect of the locking block 22, the collection box 13 can be removed from the surface of the equipment, making it convenient to pour the paint inside the collection box 13 into the designated location. Then, according to the same principle, the collection box 13 is reset for subsequent use, achieving a good collection effect of paint. This solves the problem that traditional equipment usually places a collection bucket at the bottom of the equipment, but because the distance between the collection bucket and the conveyor 1 is large, the paint is easy to splash out during the collection process.

Claims

1. A doctor blade assembly for coating PET sheets, comprising a conveyor table (1), characterized in that: A roller mill (2) is fixedly connected to one side of the conveyor platform (1), and multiple telescopic cylinders (3) are fixedly connected to the top of the roller mill (2). A scraper (4) is fixedly connected to the output end of the multiple telescopic cylinders (3), and a blocking component is provided on the outer wall of the scraper (4). The blocking assembly includes multiple baffles (11), which are located on one side of the scraper (4). The scraper (4) has a groove (12) inside. Each baffle (11) is fixedly connected to one side of a connecting block (5). Each connecting block (5) is fixedly connected to a connecting post (6). The multiple connecting posts (6) are slidably connected to the inner wall of the groove (12). Each connecting post (6) is fixedly connected to one end of a positioning ring (7). Each connecting block (5) is threadedly connected to a threaded rod (8). Each threaded rod (8) is fixedly connected to one end of a locking post (9). The multiple locking posts (9) engage with the groove on one side of the scraper (4).

2. The doctor blade assembly for coating PET sheets according to claim 1, characterized in that: Each of the threaded rods (8) is fixedly connected to a handle (10) at the other end, and multiple positioning rings (7) are attached to one side of the scraper (4). A collection assembly is provided on one side of the conveyor table (1).

3. The doctor blade assembly for coating PET sheets according to claim 2, characterized in that: The collection assembly includes a collection box (13), and a support plate (14) is fixedly connected to one side of the conveyor (1). The top of the support plate (14) is attached to the bottom of the collection box (13).

4. The doctor blade assembly for coating PET sheets according to claim 3, characterized in that: The collection box (13) is fixedly connected to both sides by connecting plates (15), and the conveyor (1) is fixedly connected to one side by multiple fixing blocks (16).

5. A doctor blade assembly for coating PET sheets according to claim 4, characterized in that: Each of the fixed blocks (16) is fixedly connected to a fixed shell (17), and each of the fixed shells (17) is slidably connected to a transmission column (18) and a locking block (22).

6. A doctor blade assembly for coating PET sheets according to claim 5, characterized in that: One end of each of the transmission columns (18) is fixedly connected to one side of the locking block (22), and each of the locking blocks (22) engages with the inside of the connecting plate (15).

7. A doctor blade assembly for coating PET sheets according to claim 6, characterized in that: Each of the transmission columns (18) is provided with a spring (21) on its outer wall. One end of each spring (21) is fixedly connected to one side of the locking block (22), and the other end of each spring (21) is fixedly connected to one side of the inner wall of the fixed shell (17).

8. A doctor blade assembly for coating PET sheets according to claim 7, characterized in that: Each of the transmission columns (18) is rotatably connected to one end of a rotating bar (19), and each of the rotating bars (19) is rotatably connected to a push plate (20) on its outer wall. Each of the push plates (20) is in contact with one side of the fixed block (16).

Images