A doctor blade structure for a film coater

Abstract

The utility model discloses a kind of scraper structures for film coating machine, it is related to film coating machine scraper technical field, including box, adjusting assembly and rotating assembly are arranged in the box, the gap between scraper and coating roller is adjusted by adjusting assembly, to control the pressure of coating of scraper, the gear meshed with rack plate is rotated by rotating handle, to drive scraper rotation, the angle of scraper is flexibly adjusted, so that the angle between scraper and coating is in suitable interval, the flatness and gloss of coating are improved, the quality of coating is improved, one side of the box is fixedly provided with cleaning tank, brush and cleaning wool are arranged on cleaning tank, and the colloid adhered to the surface of coating roller and scraper is scraped and cleaned, avoid the increase of adhering amount after colloid hardening, leading to the increase of coating surface scratch in subsequent scraping process, the flatness and uniformity of coating are both poor, reduce the quality of coating product.

Description

Technical Field

[0001] This utility model relates to the field of coating machine scraper technology, specifically to a scraper structure for a film coating machine. Background Technology

[0002] With the continued rapid development of industries such as packaging, electronics, medical, and automotive, the demand for various coated films is constantly increasing. For example, the packaging industry has a strong demand for films with high barrier properties, water resistance, and printability; the electronics industry needs high-precision, high-performance coated films for manufacturing electronic components; and the optics industry needs to coat various optical film materials to achieve specific optical effects, such as coating anti-reflective and reflective films on optical lenses. This will directly drive the market demand for film coating machines, thereby boosting the market growth of blade coating structures.

[0003] The doctor blade structure, as a key component of a film coating machine, boasts advantages such as high coating precision, good coating uniformity, strong adaptability, and simple and flexible operation. During operation, the doctor blade is applied close to the fabric surface with a specific pressure and angle to scrape away excess coating, thus controlling and homogenizing the coating thickness. A tiny gap is formed between the blade and the fabric surface; the size of this gap determines the final coating thickness.

[0004] Traditional film coating machines use doctor blades whose angles cannot be flexibly adjusted according to the viscosity of the coating, the coating speed, and the material being coated. The angle between the doctor blade and the coating roller has a significant impact on the coating effect. When the doctor blade angle is within a suitable range, the coating material is distributed more evenly on the coating surface, and the smoothness and gloss of the coating are significantly improved. At the same time, if the doctor blade and coating roller are not thoroughly cleaned after each batch of use, the amount of adhesive adhering to the doctor blade and coating roller will increase, making the surface uneven. This will easily lead to more scratches on the coating surface during subsequent cleaning processes, resulting in poor smoothness and uniformity of the coating. Utility Model Content

[0005] The purpose of this utility model is to provide a doctor blade structure for a film coating machine, solving the following technical problems: In actual operation, the angle of the doctor blade used in traditional film coating machines cannot be flexibly adjusted according to the viscosity of the coating, the coating speed, and the coating material. The angle between the doctor blade and the coating roller has a great influence on the coating effect. When the doctor blade angle is within a suitable range, the coating material is more evenly distributed on the coating surface, and the smoothness and gloss of the coating are significantly improved. At the same time, if the doctor blade and coating roller are not thoroughly cleaned after a batch of use, the amount of adhesive adhering to the doctor blade and coating roller will increase, making the surface uneven. In subsequent cleaning processes, this will easily lead to more scratches on the coating surface, resulting in poor smoothness and uniformity of the coating.

[0006] The objective of this utility model can be achieved through the following technical solutions:

[0007] A scraper structure for a film coating machine includes a housing. A coating roller is rotatably connected to the inner wall of the housing. A scraper is disposed above the coating roller with clearance fitting. An adjustment component is disposed at the upper end of the housing. The adjustment component is used to drive the scraper to reciprocate in the vertical direction. A scraper holder is fixedly installed at the lower end of the adjustment component. A rotating component is disposed at one end of the scraper holder. The rotating component is used to adjust the angle of the scraper.

[0008] As a further embodiment of this utility model: the rotating assembly includes rotating shafts rotatably disposed on both sides of the scraper holder, the two rotating shafts being fixedly connected to both ends of the scraper, a rectangular plate being fixedly installed at one end of the scraper holder, a through hole being opened inside the rectangular plate, a gear being disposed in the through hole, one side of the gear being fixedly connected to the rotating shaft, a rack plate being disposed at the lower end of the gear and meshing therewith, through openings being opened on both sides of the rectangular plate parallel to the cross section of the rack plate, and a driving assembly being disposed at the lower end of the rack plate, the driving assembly being used to drive the rack plate to move horizontally.

[0009] As a further embodiment of this utility model: the driving assembly includes a slider fixedly installed at the lower end of the rack plate, the lower end of the slider is threadedly connected to a helical rod, one end of the helical rod is fixedly provided with a rotating handle, and the other end of the helical rod is rotatably connected to the inner sidewall of the rectangular plate.

[0010] As a further embodiment of this utility model: the adjustment assembly includes an adjustment bolt symmetrically rotatably disposed at the upper end of the housing, the lower end of the adjustment bolt being connected to a first spring, and the lower end of the first spring being fixedly connected to the scraper holder.

[0011] As a further embodiment of this utility model: a cleaning tank is fixed to one side of the box body, a water pump is fixedly installed inside the cleaning tank, an L-shaped pipe is connected to the water pump, a conduit is fixedly connected to the end of the L-shaped pipe, and multiple spray nozzles are arrayed at the lower end of the conduit.

[0012] As a further embodiment of this utility model: a T-shaped rod is rotatably arranged at one end of the box body directly below the cleaning box, a cleaning trough is fixedly installed at one end of the T-shaped rod, a brush is fixedly installed at the lower end of the cleaning trough, a plurality of second springs are symmetrically fixedly arranged inside the cleaning trough, a cleaning sponge is fixedly installed at the end of the plurality of second springs, and water outlets are symmetrically opened at the bottom of the cleaning trough.

[0013] As a further embodiment of this utility model: a door is provided on one side of the box, and a collection box is provided at the lower end of the box.

[0014] The beneficial effects of this utility model are:

[0015] (1) This utility model adjusts the gap between the scraper and the coating roller by adjusting the adjustment component set in the box. The first spring makes the pressure between the scraper and the coating roller in a suitable range. The rotating handle drives the rack plate to move horizontally, and the rack plate drives the gear to rotate to flexibly adjust the angle of the scraper. In a suitable angle range, the coating glue is evenly applied, and the overall quality of the coating is improved.

[0016] (2) This utility model uses a brush and a cleaning sponge set on the cleaning tank to scrape and wash the colloid adhering to the coating roller and the scraper. High-pressure water is pumped by a water pump to thoroughly rinse the cleaning tank, so as to avoid the increased amount of colloid adhering after a long period of non-use, which would lead to more scratches on the coating surface during the subsequent scraping process, and poor flatness, uniformity and gloss of the coating, thus reducing the quality of the coated product. Attached Figure Description

[0017] The present invention will be further described below with reference to the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the overall internal structure of this utility model;

[0019] Figure 2 This is a side view of the structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the internal structure of the rotating component of this utility model;

[0021] Figure 4 This is a schematic diagram of the structure of the cleaning tank of this utility model;

[0022] Figure 5 This is a schematic diagram of the overall structure of the box door of this utility model.

[0023] In the diagram: 1. Box body; 2. Coating roller; 3. Doctor blade; 4. Adjustment assembly; 5. Doctor blade holder; 6. Rotating assembly; 7. Rotating shaft; 8. Rectangular plate; 9. Through hole; 10. Gear; 11. Rack plate; 12. Through port; 13. Slider; 14. Helical rod; 15. Rotating handle; 16. Adjusting bolt; 17. First spring; 18. Cleaning box; 19. Water pump; 20. L-shaped pipe; 21. Conduit; 22. Spray nozzle; 23. T-shaped rod; 24. Cleaning tank; 25. Brush; 26. Second spring; 27. Cleaning sponge; 28. Water outlet; 29. ​​Box door; 30. Collection box. Detailed Implementation

[0024] 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 scope of protection of the present utility model.

[0025] Example 1: Please refer to Figure 1-2 As shown, this utility model is a scraper structure for a film coating machine, including a housing 1. A coating roller 2 is rotatably connected to the inner wall of the housing 1 via a connecting shaft. The coating roller 2 is driven to rotate slowly on the outer wall of the housing 1 by a servo motor, allowing the coated product to be wound onto the coating roller 2 and exit from the other end, thus achieving automatic rolling feeding. A scraper 3 is fitted with a clearance fit directly above the coating roller 2. An adjustment component 4 is rotatably mounted at the upper end inside the housing 1. The adjustment component 4 is used to drive the scraper 3 to reciprocate vertically. A scraper holder 5 is fixedly installed at the lower end of the adjusting component 4. The lower end of the scraper holder 5 is slidably disposed in a groove on the inner side wall of the housing 1. The groove is designed to limit the horizontal displacement of the scraper holder 5 and improve the scraping effect. A rotating component 6 is provided at one end of the scraper holder 5. The rotating component 6 is used to precisely adjust the angle of the scraper 3, so that the paint is distributed more evenly on the coating, and the smoothness and gloss of the coating are improved. At the same time, the angle of the scraper 3 can be flexibly adjusted according to different paint viscosity, coating speed and coating material to improve the coating scraping effect.

[0026] The rotating assembly 6 includes rotating shafts 7 symmetrically arranged on both sides of the scraper holder 5. The two rotating shafts 7 are fixedly connected to both ends of the scraper 3. A rectangular plate 8 is fixedly installed at one end of the scraper holder 5. A through hole 9 is opened inside the rectangular plate 8. A gear 10 is installed in the through hole 9. The central axis of one side of the gear 10 is fixedly connected to the rotating shaft 7. A rack plate 11 meshing with the gear 10 is provided at the lower end of the gear 10. The rack plate (11) is located inside the through hole 9. Through openings 12 are opened on both sides of the rectangular plate 8 parallel to the cross section of the rack plate 11. The rack plate 11 can move horizontally within the through openings 12. A driving assembly is provided at the lower end of the rack plate 11. The driving assembly is used to drive the rack plate 11 to move horizontally, thereby driving the gear 10 to rotate to precisely adjust the angle of the scraper 3.

[0027] The driving assembly includes a slider 13 fixedly installed at the lower end of the rack plate 11. The lower end of the slider 13 is threadedly connected to a helical rod 14. One end of the helical rod 14 is fixedly provided with a rotating handle 15 on the outer side of the rectangular plate 8. The other end of the helical rod 14 is rotatably connected to the inner side wall of the rectangular plate 8. By rotating the rotating handle 15, the slider 13 is driven to move on the helical rod 14, thereby driving the rack plate 11 to move horizontally.

[0028] The adjustment assembly 4 includes an adjustment bolt 16 symmetrically rotatably mounted on the upper end of the housing 1. The lower end of the adjustment bolt 16 is connected to a first spring 17. The spring can buffer between the doctor blade 3 and the cloth, preventing the doctor blade 3 from applying excessive pressure to the coating. Through the buffering effect of the first spring 17, the pressure between the doctor blade 3 and the cloth can be kept within a suitable range, which can ensure the coating effect and protect the cloth surface from damage. At the same time, the cloth surface may have some unevenness or undulation. The first spring 17 can make the doctor blade 3 automatically adjust its position according to the cloth surface condition, always maintaining good contact with the cloth surface and ensuring the uniformity of coating. The lower end of the first spring 17 is fixedly connected to the doctor blade holder 5.

[0029] In summary, when using the doctor blade structure of the film coating machine, the operator winds the coated fabric from the upper surface of the coating roller 2, and then passes it out from the bottom. The operator rotates the adjusting component 4 to control the gap between the doctor blade 3 and the coating roller 2, thereby adjusting the pressure between the doctor blade 3 and the fabric. Through the buffer of the first spring 17, the pressure between the doctor blade 3 and the fabric is kept within a suitable range, ensuring both coating and scraping effect and preventing damage to the fabric surface. After adjusting the height of the doctor blade 3, rotating the rotating handle 15 drives the rack plate 11 to move horizontally, thereby driving the gear 10 to rotate slowly. The gear 10 drives the doctor blade 3 to rotate around its central axis, thereby adjusting the angle of the doctor blade 3. Generally speaking, a doctor blade 3 angle between 15 and 45 degrees can achieve a better coating effect. Experiments have shown that when the doctor blade 3 angle is around 30 degrees, the coating is more evenly distributed on the paper surface, and the smoothness and gloss of the coating are improved. Furthermore, the angle of the scraper 3 can be flexibly adjusted according to different coating viscosities, coating speeds, and substrate types. After the height and angle are adjusted, the coating roller 2 is driven to rotate by the servo motor installed on the outer wall of the housing 1, thereby realizing automatic rolling feeding. The fabric coated by the coating machine is automatically and evenly scraped by the scraper 3 to ensure uniform application of the coating adhesive, effectively guaranteeing coating quality and precision, and improving the overall efficiency of the equipment.

[0030] Example 2: Based on Example 1, please refer to... Figure 3-5As shown, a cleaning tank 18 is fixed to one side of the housing 1. A water pump 19 is fixedly installed inside the cleaning tank 18. An L-shaped pipe 20 is connected to the water pump 19. The L-shaped pipe 20 passes through the cleaning tank 18 and is fixedly connected to the side wall of the housing 1 with a conduit 21. Multiple spray nozzles 22 are arranged in an array at the lower end of the conduit 21.

[0031] A T-shaped rod 23 is rotatably mounted at one end of the housing 1 directly below the cleaning tank 18. A cleaning tank 24 is fixedly installed at one end of the T-shaped rod 23. A brush 25 is fixedly installed at the lower end of the cleaning tank 24. The brush 25 is used to clean the outer surface of the coating roller 2 to prevent the adhesive from adhering to the surface of the coating roller 2 and causing uneven coating. Multiple second springs 26 are symmetrically fixed inside the cleaning tank 24. The multiple second springs 26 are designed at an angle. A cleaning sponge 27 is fixedly installed at the end of the multiple second springs 26. The second springs 26 and the symmetrically designed cleaning sponge 27 make the cleaning sponge 27 fit more closely to the side wall of the scraper 3 under pressure, thereby quickly removing the adhesive adhering to the scraper 3 and preventing the adhesive from hardening and scratching the coating during the scraping process. Water outlets 28 are symmetrically opened at the bottom of the cleaning tank 24.

[0032] A door 29 is provided on one side of the box body 1. The door 29 is connected by a hinge pin, allowing the door 29 to rotate around the hinge pin. The box body 1 can be opened periodically to clean and maintain the scraper 3, coating roller 2, and inner wall of the box body 1. A collection box 30 is provided at the lower end of the box body 1. The collection box 30 is connected to the bottom end of the box body 1 and is used to collect waste glue from cleaning and scraping.

[0033] In summary, after scraping, the T-shaped rod 23 of the film coating machine moves the cleaning tank 24 to the upper surface of the coating roller 2. The servo motor is then activated to drive the coating roller 2 to rotate. The brush 25 at the bottom of the cleaning tank 24 thoroughly cleans the outer surface of the coating roller 2. After cleaning, the adjusting bolt 16 is rotated to move the scraper 3 downwards into the cleaning tank 24. The cleaning cotton 27 symmetrically arranged inside the cleaning tank 24 scrapes and washes the side wall of the scraper 3, removing the adhering adhesive. The pressure of the second spring 26 makes the cleaning cotton 27 fit more closely to the side wall of the scraper 3. The scraping is more thorough, avoiding damage to the coating during subsequent scraping after the colloid hardens. After scraping, the cleaning tank 24 is moved to below the spray nozzle 22 by the T-shaped rod 23. Water is pumped by the water pump 19 and sprayed from the lower end of the spray nozzle 22 through the conduit 21 to perform high-pressure rinsing on the cleaning tank 24, removing the colloid adhering to the brush 25 and cleaning cotton 27. The waste liquid after cleaning is collected in the collection box 30 at the bottom of the box 1 for unified storage. During use, the box door 29 can be opened periodically to clean and maintain the inner wall of the box 1, the scraper 3, and the coating roller 2, etc., to extend the service life of the equipment.

[0034] The working principle of this utility model: The film coating machine uses a scraper structure. When the operator is using it, the product after coating is wound onto the coating roller 2. At this time, the height of the scraper 3 is adjusted by adjusting component 4. After the height is determined, the angle of the scraper 3 is precisely adjusted by rotating component 6. The angle of the scraper 3 can be flexibly adjusted according to different coating viscosities, coating speeds and coating materials to improve the coating effect. The servo motor is started to drive the coating roller 2 to rotate to complete the automatic feeding and scraping. After a batch of coating and scraping, the coating roller 2 and scraper 3 are scraped and cleaned by the brush 25 and cleaning cotton 27 set on the cleaning tank 24 to prevent the adhesive from hardening due to long-term uncleaning, which would damage the coating in subsequent use and affect the quality of the scraping. Opening the box door 29 allows for regular cleaning and maintenance of the equipment in the box 1 to improve the scraping quality of the equipment.

[0035] The above description provides a detailed account of one embodiment of the present invention. However, this description is merely a preferred embodiment and should not be construed as limiting the scope of the present invention. All equivalent variations and improvements made within the scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. A scraper structure for a film coating machine, characterized in that, The device includes a housing (1), a coating roller (2) is rotatably connected to the inner wall of the housing (1), a scraper (3) is provided above the coating roller (2) with a clearance fit, an adjustment component (4) is provided at the upper end of the housing (1), the adjustment component (4) is used to drive the scraper (3) to move back and forth in the vertical direction, a scraper holder (5) is fixedly installed at the lower end of the adjustment component (4), and a rotating component (6) is provided at one end of the scraper holder (5), the rotating component (6) is used to adjust the angle of the scraper (3).

2. The doctor blade structure for a film coating machine according to claim 1, characterized in that, The rotating assembly (6) includes rotating shafts (7) rotatably disposed on both sides of the scraper holder (5). The two rotating shafts (7) are fixedly connected to both ends of the scraper (3). A rectangular plate (8) is fixedly installed at one end of the scraper holder (5). A through hole (9) is provided inside the rectangular plate (8). A gear (10) is provided in the through hole (9). One side of the gear (10) is fixedly connected to the rotating shaft (7). A rack plate (11) meshing with the gear (10) is provided at the lower end of the gear (10). Through openings (12) are provided on both sides of the rectangular plate (8) parallel to the cross section of the rack plate (11). A driving assembly is provided at the lower end of the rack plate (11). The driving assembly is used to drive the rack plate (11) to move horizontally.

3. The scraper structure for a film coating machine according to claim 2, characterized in that, The drive assembly includes a slider (13) fixedly installed at the lower end of the rack plate (11). The lower end of the slider (13) is threadedly connected to a helical rod (14). One end of the helical rod (14) is fixedly provided with a rotating handle (15), and the other end of the helical rod (14) is rotatably connected to the inner sidewall of the rectangular plate (8).

4. The doctor blade structure for a film coating machine according to claim 1, characterized in that, The adjustment assembly (4) includes an adjustment bolt (16) symmetrically rotatably disposed on the upper end of the housing (1). The lower end of the adjustment bolt (16) is connected to a first spring (17), and the lower end of the first spring (17) is fixedly connected to the scraper holder (5).

5. The doctor blade structure for a film coating machine according to claim 1, characterized in that, A cleaning tank (18) is fixed on one side of the housing (1). A water pump (19) is fixedly installed inside the cleaning tank (18). An L-shaped pipe (20) is connected to the water pump (19). A conduit (21) is fixedly connected to the end of the L-shaped pipe (20). Multiple spray nozzles (22) are arranged in an array at the lower end of the conduit (21).

6. The doctor blade structure for a film coating machine according to claim 1, characterized in that, A T-shaped rod (23) is rotatably mounted at one end of the housing (1) directly below the cleaning tank (18). A cleaning trough (24) is fixedly installed at one end of the T-shaped rod (23). A brush (25) is fixedly installed at the lower end of the cleaning trough (24). Multiple second springs (26) are symmetrically fixed inside the cleaning trough (24). Cleaning cotton (27) is fixedly installed at the ends of the multiple second springs (26). Water outlets (28) are symmetrically opened at the bottom of the cleaning trough (24).

7. The doctor blade structure for a film coating machine according to claim 1, characterized in that, A door (29) is provided on one side of the box (1), and a collection box (30) is provided at the lower end of the box (1).

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