Micro-concave coating head for thin film production line
By introducing a stirring mechanism that links a reciprocating screw and a limiting frame, along with stirring blades and limiting blocks, into the film production line, and combining the temperature control of the corrugated plate and heating wire with the scraping function of the scraper, the problem of coating sedimentation was solved, the uniformity and adhesion of the coating were improved, the coating thickness was adjustable, the coating could be recycled, and the production cost was reduced.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- CHANGZHOU SHENGYUAN NEW MATERIAL TECH CO LTD
- Filing Date
- 2025-05-22
- Publication Date
- 2026-05-15
AI Technical Summary
In existing film production processes, coatings are prone to sedimentation, leading to substandard coating results.
The stirring mechanism employs a reciprocating screw and a limiting frame, combined with rotatable stirring blades and limiting blocks, and a composite heat transfer structure of corrugated plate and embedded heating wire. It features a combination design of limiting groove and anti-loosening threaded connector to achieve three-dimensional composite stirring and temperature control of the coating. Combined with the scraping function of the scraper, it ensures the uniformity and adhesion of the coating.
It achieves improved coating uniformity and adhesion, adjustable coating thickness, and paint recycling, thereby reducing production costs.
Smart Images
Figure CN224237301U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of thin film production technology, specifically relating to the micro-gravure coating head of a thin film production line. Background Technology
[0002] Coating machines are mainly used for surface coating processes on films, paper, etc. This machine coats a roll of substrate with a specific functional adhesive, coating, or ink, dries it, and then rewinds it. It uses a dedicated multi-functional coating head to achieve various forms of surface coating. Both the unwinding and rewinding of the coating machine are equipped with a full-speed automatic film splicing mechanism. The microgravure coating head is an essential device on the coating machine. It is a high-precision coating device mainly used to uniformly coat thin layers of liquid onto the surface of substrates such as films, paper, and metal foil. Its core design is based on the principle of gravure printing, but through miniaturization and precise control, it achieves thinner coatings and higher uniformity, making it suitable for fields with strict requirements for coating thickness and consistency.
[0003] A search revealed Chinese patent CN208894500U, which discloses a micro-grooving head for producing UV-resistant BOPET film. However, it still has the following defects: the coating may precipitate during use, resulting in unqualified coating. Utility Model Content
[0004] The purpose of this invention is to provide a micro-gravure coating head for a thin film production line to solve the problems mentioned in the background art.
[0005] To achieve the above objectives, this utility model provides the following technical solution: a microgravure coating head for a film production line, comprising a device support, a pressure roller disposed inside the device support, a storage box disposed inside the device support, a cover plate fixedly connected to the top surface of the storage box by bolts, a microgravure coating roller disposed inside the cover plate, a motor mounted on the surface of the device support, the output shaft of the motor passing through the storage box and fixedly connected to the microgravure coating roller by a coupling, a first sprocket and a second sprocket rotatably connected to the surface of the device support by bearings, a chain sleeved on the surface of the first sprocket and the second sprocket and meshing therewith, a reciprocating screw disposed inside the storage box, the reciprocating screw rotatably connected to the storage box by a rotating shaft, the rotating shaft passing through the storage box and fixedly connected to the second sprocket, a threaded block threadedly connected to the surface of the reciprocating screw, and a connecting rod fixedly connected to the bottom surface of the threaded block.
[0006] Preferably, the bottom surface of the cover plate is fixedly connected to a limiting frame by bolts, the reciprocating lead screw is located inside the limiting frame, and the lead block is slidably connected to the limiting frame.
[0007] Preferably, the surface of the connecting rod is fitted with a stirring blade, the stirring blade is rotatably connected to the connecting rod, and a plurality of limiting blocks are uniformly fixedly connected to one side inner wall of the storage box along the axis, the stirring blade and the limiting blocks are in contact with each other.
[0008] Preferably, a corrugated plate is fixedly connected to the bottom surface of the storage box by bolts. The corrugated plate has several mounting holes inside, and a heating wire is installed inside each mounting hole. A temperature controller is installed on the surface of the device bracket, and the heating wires are electrically connected to the temperature controller.
[0009] Preferably, two tracks are symmetrically installed on the surface of the storage box, and a slider is slidably connected inside each track. A scraper is fixedly connected to the top of the slider, and a limiting plate is fixedly connected to the bottom surface of the scraper. A fixing plate is fixedly connected to the surface of the storage box, and the fixing plate is located below the limiting plate. Several limiting grooves are opened at the top of the fixing plate. An extrusion plate is provided between the limiting plate and the fixing plate. The extrusion plate is located in a trapezoidal structure with the inclined surface facing upward. Several limiting rollers are uniformly fixedly connected to the bottom surface of the extrusion plate along the axis. The limiting plate and the fixing plate are connected to each other by threaded connectors.
[0010] Preferably, the cover plate has a positioning groove inside, and a guide groove is installed inside the positioning groove by bolts. The guide groove is located below the scraper, the guide groove is inclined, and a filter screen is fixedly connected to the lower end of the guide groove by bolts.
[0011] Compared with the prior art, the beneficial effects of this utility model are:
[0012] 1. This utility model achieves three-dimensional composite mixing simultaneously during the coating process by using a stirring mechanism that links a reciprocating lead screw and a limiting frame, combined with the cooperation of a rotatable stirring blade and a limiting block.
[0013] 2. This utility model improves coating adhesion by using a composite heat transfer structure with a corrugated plate and an embedded heating wire, in conjunction with a temperature controller.
[0014] 3. This utility model achieves adjustable coating thickness by combining a limiting groove and an anti-loosening threaded connector with the scraping function of a scraper. Attached Figure Description
[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0016] Figure 2 This is a schematic diagram of the vertical cross-sectional structure of the storage box of this utility model;
[0017] Figure 3This is a schematic diagram of the reciprocating lead screw and lead block structure of this utility model;
[0018] Figure 4 This is a schematic diagram of the limiting plate and extrusion plate structure of this utility model;
[0019] Figure 5 This is a schematic diagram of the cover plate and guide channel structure of this utility model;
[0020] Figure 6 This is a schematic diagram of the corrugated plate and heating wire structure of this utility model;
[0021] Figure 7 This is a schematic diagram of the scraper structure of this utility model.
[0022] In the diagram: 1. Device support; 2. Pressure roller; 3. Storage box; 4. Cover plate; 5. Micro-coating roller; 6. First sprocket; 7. Motor; 8. Second sprocket; 9. Reciprocating screw; 10. Wire block; 11. Limiting frame; 12. Connecting rod; 13. Stirring blade; 14. Limiting block; 15. Scraper; 16. Track; 17. Slider; 18. Fixing plate; 19. Limiting plate; 20. Extrusion plate; 21. Limiting roller; 22. Limiting groove; 23. Threaded connector; 24. Guide groove; 25. Temperature controller; 26. Filter screen; 27. Corrugated plate; 28. Heating wire; 29. Chain. Detailed Implementation
[0023] 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.
[0024] Please see Figures 1-7This utility model provides a microgravure coating head for a film production line, including a device support 1. A pressure roller 2 is installed inside the device support 1. A storage box 3 is also installed inside the device support 1. A cover plate 4 is bolted to the top surface of the storage box 3. A microgravure coating roller 5 is installed inside the cover plate 4. A motor 7 is mounted on the surface of the device support 1. The output shaft of the motor 7 passes through the storage box 3 and is fixedly connected to the microgravure coating roller 5 via a coupling. A first sprocket 6 and a second sprocket 8 are rotatably connected to the surface of the device support 1 via bearings. A chain 29 is fitted onto the surface of the sprocket 6 and the second sprocket 8 and meshes with it. A reciprocating screw 9 is installed inside the storage box 3. The reciprocating screw 9 is rotatably connected to the storage box 3 via a rotating shaft. The rotating shaft passes through the storage box 3 and is fixedly connected to the second sprocket 8. A screw block 10 is threaded onto the surface of the reciprocating screw 9. A connecting rod 12 is fixedly connected to the bottom surface of the screw block 10. A limit frame 11 is fixedly connected to the bottom surface of the cover plate 4 by bolts. The reciprocating screw 9 is located inside the limit frame 11. The screw block 10 is slidably connected to the limit frame 11. When coating the film is required, first pour the appropriate amount of coating into the storage box 3. This can be judged through the observation window on the surface of the storage box 3. Then, install the pressure roller 2 in the appropriate position and pass the film between the micro-gravure coating roller 5 and the pressure roller 2. Connect the motor 7 to an external power source and start it to make the micro-gravure coating roller 5 rotate, which moves the film. The coating is applied to the film surface by utilizing the characteristics of the micro-gravure coating roller 5 itself. When the motor 7 starts, it will drive the first sprocket 6 to rotate. The first sprocket 6 will drive the second sprocket 8 to rotate through the chain 29. The rotation of the second sprocket 8 will drive the reciprocating screw 9 to rotate through the shaft. The screw block 10, which is threaded to the reciprocating screw 9, will be limited and slide inside the limit frame 11. The screw block 10 will drive the connecting rod 12 to move back and forth inside the storage box 3, thereby stirring the coating inside the storage box 3 and preventing uneven coating due to sedimentation, which would result in unqualified product quality.
[0025] In this embodiment, a stirring blade 13 is sleeved on the surface of the connecting rod 12. The stirring blade 13 is rotatably connected to the connecting rod 12. Several limiting blocks 14 are uniformly fixedly connected along the axis on one side of the inner wall of the storage box 3. The stirring blade 13 and the limiting blocks 14 are in contact with each other. When the connecting rod 12 moves, it will drive the stirring blade 13 to move. While the stirring blade 13 is moving, it will be limited by the limiting blocks 14, so that the stirring blade 13 will rotate on the surface of the connecting rod 12 when it moves. The stirring of the coating is achieved by the rotation of the stirring blade 13, so that the coating is more uniform inside.
[0026] In this embodiment, a corrugated plate 27 is fixedly connected to the bottom surface of the storage box 3 by bolts. The corrugated plate 27 has several mounting holes, and a heating wire 28 is installed inside each mounting hole. A temperature controller 25 is installed on the surface of the device bracket 1. The heating wires 28 are electrically connected to the temperature controller 25. When coating the film, the temperature controller 25 is activated, so that the heating wires 28 are energized and heated. The heat from the heating wires 28 is transferred to the coating through the corrugated plate 27 to prevent the coating from becoming too sticky due to temperature, thus making it difficult to stick to the film surface.
[0027] In this embodiment, two tracks 16 are symmetrically installed on the surface of the storage box 3. A slider 17 is slidably connected inside each track 16. A scraper 15 is fixedly connected to the top of the slider 17, and a limiting plate 19 is fixedly connected to the bottom surface of the scraper 15. A fixing plate 18 is fixedly connected to the surface of the storage box 3, located below the limiting plate 19. Several limiting grooves 22 are formed at the top of the fixing plate 18. An extrusion plate 20 is provided between the limiting plate 19 and the fixing plate 18. The extrusion plate 20 is located in a trapezoidal structure with its inclined surface facing upwards. Several limiting rollers 21 are uniformly fixedly connected to the bottom surface of the extrusion plate 20 along its axis. The limiting plate 19 and the fixing plate 18 are connected to each other via threaded connectors 23. To ensure that the coating thickness applied by the micro-gravure coating roller 5 to the film surface is consistent each time, the scraper 15 can scrape off the excess coating on the surface of the micro-gravure coating roller 5. To accommodate coatings of different thicknesses, the threaded connector 23 is rotated to loosen the gap between the limiting plate 19 and the fixed plate 18. Then, the extrusion plate 20 is moved, and the slider 17 slides inside the track 16. Since the spacing between each limiting groove 22 is equal, the spacing between the fixed plate 18 and the limiting plate 19 changes by one micrometer for each step the extrusion plate 20 moves, making it easy to adjust. After adjustment, the threaded connector 23 is tightened to adjust the position of the scraper 15, which can be used to scrape coatings of a certain thickness.
[0028] It should be noted that in the threaded connector 23, an annular groove is axially provided on the inner wall of the threaded cylinder. A nylon 66 damping ring with a Shore hardness of 85A is embedded in the groove. The continuous axial clamping force generated by its elastic deformation forms a helical angle interference fit with the screw surface of 15°-20°. When the threaded pair is subjected to axial vibration load, the nylon insert can generate a maximum elastic compression of 0.3mm, which increases the friction coefficient between the thread contact surfaces from 0.15 to 0.68. According to the standard test methods for static and dynamic friction coefficients, it effectively suppresses the loosening displacement caused by thread springback.
[0029] In this embodiment, a positioning groove is provided inside the cover plate 4, and a guide groove 24 is installed inside the positioning groove by bolts. The guide groove 24 is located below the scraper 15 and is inclined. The lower end of the guide groove 24 is fixedly connected to the filter screen 26 by bolts. When the scraper 15 scrapes off the coating, the paint will stick to the bottom surface of the scraper 15. Because the scraper 15 is inclined, the paint will flow along the lower side of the scraper 15 until it falls into the interior of the guide groove 24. Because the guide groove 24 is inclined, the excess paint will eventually be filtered by the filter screen 26 and returned to the interior of the storage box 3 for reuse, realizing recycling, saving materials, and reducing costs.
[0030] The use of this utility model involves the following steps:
[0031] S1: When coating the film is required, first pour the paint to an appropriate height into the storage box 3. This can be judged from the observation window on the surface of the storage box 3. Then, install the pressure roller 2 in the appropriate position and pass the film between the micro-gravure coating roller 5 and the pressure roller 2. Connect the motor 7 to the external power supply and start it to make the micro-gravure coating roller 5 rotate, which drives the film to move. The coating is applied to the surface of the film by utilizing the characteristics of the micro-gravure coating roller 5 itself. When the motor 7 starts, it will drive the first sprocket 6 to rotate. The first sprocket 6 will drive the second sprocket 8 to rotate through the chain 29. The rotation of the second sprocket 8 will drive the reciprocating screw 9 to rotate through the rotating shaft. The screw block 10, which is threaded to the reciprocating screw 9, will be limited and slide inside the limit frame 11. The screw block 10 will drive the connecting rod 12 to move back and forth inside the storage box 3, thereby stirring the paint inside the storage box 3.
[0032] S2: When the connecting rod 12 moves, it will drive the stirring blade 13 to move. While the stirring blade 13 is moving, it will be limited by the limiting block 14, so that the stirring blade 13 will rotate on the surface of the connecting rod 12 when it moves. The stirring of the paint is achieved by the rotation of the stirring blade 13.
[0033] S3: When coating the film, the temperature controller 25 is activated, which energizes several heating wires 28 and causes them to heat up. The heat from the heating wires 28 is transferred to the coating through the corrugated plate 27.
[0034] S4: To ensure that the coating thickness applied by the micro-gravure coating roller 5 to the film surface is consistent each time, the scraper 15 can scrape off the excess coating on the surface of the micro-gravure coating roller 5. To accommodate coatings of different thicknesses, the threaded connector 23 is rotated to loosen the gap between the limiting plate 19 and the fixed plate 18. Then, the extrusion plate 20 is moved, and the slider 17 slides inside the track 16. Since the spacing between each limiting groove 22 is equal, the spacing between the fixed plate 18 and the limiting plate 19 changes by one micrometer for each step the extrusion plate 20 moves, making it easy to adjust. After the adjustment is completed, the threaded connector 23 is tightened to adjust the position of the scraper 15.
[0035] S5: After the scraper 15 scrapes off the coating, the paint will stick to the bottom surface of the scraper 15. Since the scraper 15 is inclined, the paint will flow along the lower side of the scraper 15 until it falls into the interior of the guide channel 24. Since the guide channel 24 is inclined, the excess paint will eventually be filtered by the filter screen 26 and returned to the interior of the storage box 3 for reuse.
[0036] Finally, the following points should be noted: In the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection" and "linkage" should be interpreted broadly, and can be mechanical or electrical connection, or internal connection between two components, or direct connection. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationship. When the absolute position of the described object changes, the relative positional relationship may change.
[0037] The electronic components and modules used in this utility model can all be parts that are commonly used in the market and can achieve the specific functions in this case. The specific models and sizes can be selected and adjusted according to actual needs.
[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A microgravure coating head for a film production line, comprising a device support (1), wherein a pressure roller (2) is disposed inside the device support (1), characterized in that: The device support (1) has a storage box (3) inside. The top surface of the storage box (3) is fixedly connected to a cover plate (4) by bolts. The cover plate (4) has a micro-coating roller (5) inside. A motor (7) is mounted on the surface of the device support (1). The output shaft of the motor (7) passes through the storage box (3) and is fixedly connected to the micro-coating roller (5) by a coupling. The surface of the device support (1) is rotatably connected to a first sprocket (6) and a second sprocket (7) by bearings. 8) The first sprocket (6) and the second sprocket (8) are fitted with chains (29) and are meshed with them. The storage box (3) is provided with a reciprocating screw (9). The reciprocating screw (9) is rotatably connected to the storage box (3) through a rotating shaft. The rotating shaft passes through the storage box (3) and is fixedly connected to the second sprocket (8). The surface of the reciprocating screw (9) is threaded with a screw block (10). The bottom surface of the screw block (10) is fixedly connected with a connecting rod (12).
2. The microgravure coating head for a thin film production line according to claim 1, characterized in that: The bottom surface of the cover plate (4) is fixedly connected to the limiting frame (11) by bolts. The reciprocating screw (9) is located inside the limiting frame (11). The screw block (10) is slidably connected to the limiting frame (11).
3. The microgravure coating head for a thin film production line according to claim 1, characterized in that: The surface of the connecting rod (12) is fitted with a stirring blade (13), the stirring blade (13) is rotatably connected to the connecting rod (12), and a number of limiting blocks (14) are uniformly fixedly connected along the axis on one side of the inner wall of the storage box (3), and the stirring blade (13) and the limiting block (14) are in contact with each other.
4. The microgravure coating head for a thin film production line according to claim 1, characterized in that: The bottom surface of the storage box (3) is fixedly connected to a corrugated plate (27) by bolts. The corrugated plate (27) has several mounting holes, and each mounting hole is equipped with a heating wire (28). The surface of the device bracket (1) is equipped with a temperature controller (25), and the heating wires (28) are electrically connected to the temperature controller (25).
5. The microgravure coating head for a thin film production line according to claim 1, characterized in that: The surface of the storage box (3) is symmetrically equipped with two tracks (16). Each track (16) is slidably connected to a slider (17). The top of the slider (17) is fixedly connected to a scraper (15). The bottom surface of the scraper (15) is fixedly connected to a limiting plate (19). The surface of the storage box (3) is fixedly connected to a fixing plate (18). The fixing plate (18) is located below the limiting plate (19). The top of the fixing plate (18) is provided with several limiting grooves (22). An extrusion plate (20) is provided between the limiting plate (19) and the fixing plate (18). The extrusion plate (20) is located in a trapezoidal structure with the inclined surface facing upward. Several limiting rollers (21) are uniformly fixedly connected to the bottom surface of the extrusion plate (20) along the axis. The limiting plate (19) and the fixing plate (18) are connected to each other by a threaded connector (23).
6. The microgravure coating head for a thin film production line according to claim 5, characterized in that: The cover plate (4) has a positioning groove inside, and a guide groove (24) is installed inside the positioning groove by bolts. The guide groove (24) is located below the scraper (15). The guide groove (24) is inclined, and a filter screen (26) is fixedly connected to the lower end of the guide groove (24) by bolts.