Coating apparatus for protecting films

Abstract

The application discloses a kind of coating equipment for protective film, and the circumferential outer wall of driving shaft, driven shaft is provided with several stirring blades, and the driven gear fixedly sleeved in one end of driven shaft is connected with driving gear, liquid level monitoring box is electrically connected with a buzzer, warning light, the top end of connecting rod has a float, and the bottom end is fixedly provided with an upper mounting plate, the lower surface of the upper mounting plate is spaced apart and provided with a first electric connector A, second electric connector A, a lower mounting plate below the upper mounting plate is fixed on the inner wall of box body, the upper surface of the lower mounting plate is spaced apart and provided with a first electric connector B, second electric connector B, an electric sliding table is vertically arranged on the side inner wall of box body, and clamping cylinder is installed on the moving end of electric sliding table.The present application can not only fully stir glue solution, but also monitor fluctuating liquid level, so as to facilitate personnel to add glue solution in time.

Description

Technical Field

[0001] This invention relates to the field of coating equipment technology, and more particularly to a coating equipment for protective films. Background Technology

[0002] Coating technology is widely used in coating and laminating packaging of substrates such as paper and film. Protective film is a thin, flexible, transparent sheet made of plastic, adhesives, rubber, or other materials. It offers dustproof, scratch-resistant, and flexible protection, and is widely used in the electronics, machinery, and printing industries. During production, a coating device is used to apply an adhesive layer to the surface of the protective film for easy application.

[0003] However, the adhesive in the existing coating equipment remains stationary for a long time, which may cause it to dry and clump, affecting the subsequent coating effect. Summary of the Invention

[0004] The purpose of this invention is to provide a coating device for protective films. This coating device can not only fully stir the adhesive liquid to ensure the subsequent coating effect, but also monitor the fluctuating liquid level. When the amount of adhesive liquid is insufficient, it prompts the operator to add adhesive liquid in time, avoiding machine shutdown due to insufficient adhesive liquid and improving the overall coating efficiency.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is: a coating device for a protective film, comprising: a housing, a glue storage tank with a stirring mechanism disposed at the bottom of the housing, a vertical plate disposed on each side of the glue storage tank, a glue pressure roller disposed between the two opposing vertical plates and above the glue storage tank, and a coating roller rotatably connected to the vertical plate disposed between the glue pressure roller and the glue storage tank.

[0006] A second motor is mounted on the outer wall of the housing. The output shaft of the second motor is fixedly connected to one end of the coating roller. The other end of the coating roller is connected to the drive device of the stirring mechanism through a transmission device.

[0007] The stirring mechanism further includes a drive shaft, a driven shaft, and stirring blades. The drive shaft and the driven shaft are distributed in parallel at intervals inside the glue storage tank, and both of them are provided with a number of stirring blades on their circumferential outer walls.

[0008] The driving device of the stirring mechanism further includes a driving gear and a driven gear. The driving gear is located outside the glue storage tank and is sleeved and connected to one end of the driving shaft. The other end of the driving shaft is rotatably connected to the inner wall of the glue storage tank. The driven gear, which meshes with the driving gear, is fixedly sleeved on one end of the driven shaft.

[0009] A liquid level monitoring box is located on one side of a glue storage tank. The liquid level monitoring box is electrically connected to a buzzer and a warning light. The liquid level monitoring box further includes a box body, a connecting rod, and a clamping cylinder. The top of the box body has a through hole for the connecting rod to slide up and down. The top of the connecting rod has a float ball, and the bottom of the connecting rod is fixedly provided with an upper mounting plate. The lower surface of the upper mounting plate is provided with a first electrical connector A and a second electrical connector A spaced apart. A lower mounting plate located below the upper mounting plate is fixed to the inner wall of the box body. The upper surface of the lower mounting plate is provided with a first electrical connector B and a second electrical connector B spaced apart. An electric slide is vertically provided on one side of the inner wall of the box body. The clamping cylinder is installed on the moving end of the electric slide, and the connecting rod is located between the clamping jaws of the clamping cylinder.

[0010] The following are further improvements to the above technical solution:

[0011] 1. In the above scheme, the transmission device further includes a first transmission wheel, a second transmission wheel, and a transmission belt. The first transmission wheel is installed at the end of the coating roller, the second transmission wheel is disposed at the end of the drive shaft, and the first transmission wheel and the second transmission wheel are connected by a transmission belt.

[0012] 2. In the above scheme, the first electrical connector A and the first electrical connector B are electrically connected to the electric slide and the clamping cylinder, and the second electrical connector A and the second electrical connector B are electrically connected to the buzzer and the warning light.

[0013] 3. In the above scheme, a feed port is provided on one side of the housing, and a discharge port is provided on the upper part of the other side of the housing. A feeding roller and a winding roller are respectively provided for the feed port and the discharge port. One end of the winding roller is fixedly connected to the output shaft of a first motor.

[0014] 4. In the above scheme, a first guide roller and a second guide roller are provided above the glue storage tank and on the side near the discharge port. The first guide roller and the second guide roller are distributed above and below.

[0015] 5. In the above scheme, the first guide roller is located below the second guide roller.

[0016] 6. In the above scheme, a scraper is set between the first guide roller and the second guide roller.

[0017] 7. In the above scheme, a controller is electrically connected to the first motor, the second motor, the clamping cylinder, the electric slide, the buzzer, and the warning light.

[0018] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0019] This invention relates to a coating device for protective films. The device comprises a drive shaft and a driven shaft, each with several stirring blades arranged on its circumferential outer wall. These shafts are parallel and spaced apart inside a glue storage tank. A drive gear is located outside the glue storage tank and is fitted onto one end of the drive shaft. A driven gear, meshing with the drive gear, is fixedly fitted onto one end of the driven shaft. A first rotating wheel is mounted at the end of the coating roller, and a second transmission wheel is located at the end of the drive shaft. The first and second transmission wheels are connected by a transmission belt. This design effectively agitates the glue in the storage tank, preventing the glue from drying and clumping due to prolonged stagnation. A second motor can simultaneously drive the coating roller and the drive shaft, saving resources and reducing costs. Furthermore, the device includes a liquid level monitoring box electrically connected to a buzzer and a warning light. The top of the box has a through hole for a connecting rod to slide up and down. The top of the connecting rod has... A float ball has an upper mounting plate fixedly mounted at its bottom. A lower mounting plate located below the upper mounting plate is fixed to the inner wall of the box. An electric slide is vertically mounted on one side of the inner wall of the box. A clamping cylinder is mounted on the moving end of the electric slide. A connecting rod is located between the grippers of the clamping cylinder. The upper mounting plate is electrically connected to the first electrical connector A and the second electrical connector A on the lower surface of the upper mounting plate and the first electrical connector B and the second electrical connector B on the upper surface of the lower mounting plate. This controls the gripper cylinder to hold the connecting rod, thereby driving the upper mounting plate and the lower mounting plate to be stably connected. This effectively avoids the float ball moving up and down with the rolling adhesive liquid surface, which would cause unstable electrical connection. It enables monitoring of fluctuating liquid levels. When the adhesive liquid level is insufficient, a buzzer and warning light will alert personnel, allowing them to add adhesive in time. This avoids machine shutdown due to insufficient adhesive liquid and improves the overall coating efficiency. Attached Figure Description

[0020] Appendix Figure 1 This is a first-view schematic diagram of the overall structure of the coating equipment of the present invention;

[0021] Appendix Figure 2 This is a schematic diagram of the overall structure of the coating equipment of the present invention from a second perspective;

[0022] Appendix Figure 3 This is a schematic diagram of the internal structure of the coating equipment for protective films according to the present invention;

[0023] Appendix Figure 4 This is a partial structural schematic diagram of the coating equipment for protective films according to the present invention;

[0024] Appendix Figure 5 This is a schematic diagram of the internal structure of the liquid level monitoring box of the present invention;

[0025] Appendix Figure 6 Appendix to this invention Figure 5 Enlarged view of point A;

[0026] Appendix Figure 7 This is a partial electrical control schematic diagram of the coating equipment for protective films according to the present invention;

[0027] Appendix Figure 8 This is a cross-sectional front view of the coating apparatus for protective films according to the present invention.

[0028] In the attached diagrams: 1. Shell; 2. Glue storage tank; 3. Stirring mechanism; 4. Vertical plate; 5. Glue pressing roller; 6. Coating roller; 7. Second motor; 8. Transmission device; 9. Drive shaft; 10. Driven shaft; 11. Stirring blade; 12. Drive gear; 13. Driven gear; 14. First transmission wheel; 15. Second transmission wheel; 16. Transmission belt; 17. Liquid level monitoring box; 171. Box body; 18. Buzzer; 19. Warning light; 20. Connecting rod; 21. Clamping cylinder; 211. Gripper; 22. Through hole; 23. Float; 24. Upper mounting plate; 25. Lower mounting plate; 261. First electrical connector A; 262. First electrical connector B; 271. Second electrical connector A; 272. Second electrical connector B; 28. Electric slide; 29. ​​Feed inlet; 30. Discharge outlet; 31. Feed roller; 32. Winding roller; 33. First motor; 34. First guide roller; 35. Second guide roller; 36. Scraper; 37. Mounting bracket; 38. Controller. Detailed Implementation

[0029] In the description of this patent, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. The terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. Furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this patent based on the specific circumstances.

[0030] The present invention will be further described below with reference to embodiments:

[0031] Example 1: A coating device for a protective film includes: a housing 1, a glue storage tank 2 with a stirring mechanism 3 disposed at the bottom of the housing 1, a vertical plate 4 disposed on each side of the glue storage tank 2, a glue pressure roller 5 disposed between the two opposing vertical plates 4 and above the glue storage tank 2, and a coating roller 6 rotatably connected to the vertical plate 4 disposed between the glue pressure roller 5 and the glue storage tank 2.

[0032] A second motor 7 is mounted on the outer wall of the housing 1. The output shaft of the second motor 7 is fixedly connected to one end of the coating roller 6. The other end of the coating roller 6 is connected to the drive device of the stirring mechanism 3 through a transmission device 8.

[0033] The stirring mechanism 3 further includes a drive shaft 9, a driven shaft 10, and stirring blades 11. The drive shaft 9 and the driven shaft 10 are distributed in parallel at intervals inside the glue storage tank 2, and both of them are provided with a number of stirring blades 11 on their circumferential outer walls.

[0034] The driving device of the stirring mechanism 3 further includes a driving gear 12 and a driven gear 13. The driving gear 12 is located outside the glue storage tank 2 and is sleeved and connected to one end of the driving shaft 9. The other end of the driving shaft 9 is rotatably connected to the inner wall of the glue storage tank 2. The driven gear 13, which meshes with the driving gear 12, is fixedly sleeved on one end of the driven shaft 10.

[0035] A liquid level monitoring box 17 is located on one side inside the glue storage tank 2. The liquid level monitoring box 17 is electrically connected to a buzzer 18 and a warning light 19.

[0036] The liquid level monitoring box 17 further includes a box body 171, a connecting rod 20, and a clamping cylinder 21. The top of the box body 171 has a through hole 22 for the connecting rod 20 to slide up and down. The top of the connecting rod 20 has a float ball 23, and the bottom of the connecting rod 20 is fixedly provided with an upper mounting plate 24. The lower surface of the upper mounting plate 24 is provided with a first electrical connector A261 and a second electrical connector A271 at intervals. A lower mounting plate 25 located below the upper mounting plate 24 is fixed to the inner wall of the box body 171. The upper surface of the lower mounting plate 25 is provided with a first electrical connector B262 and a second electrical connector B272 at intervals.

[0037] When the adhesive capacity in the glue storage tank 2 is sufficient, the float 23 moves up and down, driving the upper mounting plate 24 to move up and down through the connecting rod 20. The float 23 cannot make the upper mounting plate 24 and the lower mounting plate 25 contact each other within the up and down floating distance.

[0038] An electric slide 28 is vertically arranged on the inner wall of one side of the box body 171. The clamping cylinder 21 is installed on the moving end of the electric slide 28. The connecting rod 20 is located between the grippers 211 of the clamping cylinder 21. The clamping 211 is symmetrically arranged.

[0039] The first electrical connector A261 and the first electrical connector B262 are electrically connected to the electric slide table 28 and the clamping cylinder 21, and the second electrical connector A271 and the second electrical connector B272 are electrically connected to the buzzer 18 and the warning light 19.

[0040] When the adhesive capacity in the glue storage tank 2 is insufficient, when the float ball 23 is briefly at its lowest position, the upper mounting plate 24 and the lower mounting plate 25 will come into contact, which will cause the first electrical connector A261 and the first electrical connector B262 to briefly come into contact, and issue an immediate command to the controller 38 to control the electric slide table 28 and the clamping cylinder 21 to start briefly.

[0041] Next, the clamping cylinder 21 drives the two grippers 211 to move towards each other to clamp the connecting rod 20. The electric slide 28 drives the clamping cylinder 21 to move downward, which in turn drives the connecting rod 20 downward until the upper mounting plate 24 and the lower mounting plate 25 contact each other. At this time, the second electrical connector A271 and the second electrical connector B272 are in contact for a long time, and a long-term command is issued to the controller 5 to control the buzzer 18 and the warning light 19 to start. The buzzer 18 and the warning light 19 are always in working state, reminding the staff to add adhesive in time. There is no need to manually observe the adhesive in the adhesive storage tank 2 at regular intervals, which can prevent the situation of forgetting to observe and not adding adhesive in time, and ensure that the coating can be carried out normally.

[0042] The transmission device 8 further includes a first transmission wheel 14, a second transmission wheel 15, and a transmission belt 16. The first transmission wheel 14 is installed at the end of the coating roller 6, and the second transmission wheel 15 is disposed at the end of the drive shaft 9. The first transmission wheel 14 and the second transmission wheel 15 are connected by the transmission belt 16.

[0043] A feed inlet 29 is provided on one side of the housing 1, and a discharge outlet 30 is provided on the upper part of the other side of the housing 1. A feed roller 31 and a winding roller 32 are respectively provided at the feed inlet 29 and the discharge outlet 30. One end of the winding roller 32 is fixedly connected to the output shaft of a first motor 33.

[0044] A first guide roller 34 and a second guide roller 35 are provided above the glue storage tank 2 and on the side near the discharge port 30. The first guide roller 34 and the second guide roller 35 are distributed above and below each other.

[0045] The first guide roller 34 is located below the second guide roller 35.

[0046] A scraper 36 is positioned between the first guide roller 34 and the second guide roller 35.

[0047] In use, the feeding roller 31 provides a protective film to the inside of the outer shell 1 through the feed port 29. The protective film completes the coating of the adhesive layer between the coating roller 6 and the adhesive pressing roller 5. After the adhesive layer is coated on the coating roller 6, the protective film passes through the right side of the first guide roller 34 and the left side of the second guide roller 35 so that it is in a vertical state between the first guide roller 34 and the second guide roller 35.

[0048] Excess adhesive is scraped off by the scraper 36 and evenly distributed on the protective film. The excess adhesive slides into the adhesive storage tank 2 due to gravity, so that the excess adhesive can be reused and waste is avoided. It also prevents the scraped adhesive from splashing and accumulating everywhere and polluting the working environment. Finally, the material is discharged from the discharge port 30 and then driven by the first motor 33 to rotate and rewind onto the winding roller 32.

[0049] A controller 38 is electrically connected to a first motor 33, a second motor 7, a clamping cylinder 21, an electric slide 28, a buzzer 18, and a warning light 19.

[0050] The two ends of the first guide roller 34 are rotatably connected to the two vertical plates 4 respectively, and the two ends of the second guide roller 35 are rotatably connected to the inner wall of the housing 1 respectively.

[0051] The aforementioned feeding roller 31 and winding roller 32 are respectively mounted on a mounting frame 37.

[0052] The aforementioned first motor 33 is mounted on the side wall of the mounting bracket 37.

[0053] Example 2: A coating device for a protective film includes: a housing 1, a glue storage tank 2 with a stirring mechanism 3 disposed at the bottom of the housing 1, a vertical plate 4 disposed on each side of the glue storage tank 2, a glue pressure roller 5 disposed between the two opposing vertical plates 4 and above the glue storage tank 2, and a coating roller 6 rotatably connected to the vertical plate 4 disposed between the glue pressure roller 5 and the glue storage tank 2.

[0054] A second motor 7 is mounted on the outer wall of the housing 1. The output shaft of the second motor 7 is fixedly connected to one end of the coating roller 6. The other end of the coating roller 6 is connected to the drive device of the stirring mechanism 3 through a transmission device 8.

[0055] The stirring mechanism 3 further includes a drive shaft 9, a driven shaft 10, and stirring blades 11. The drive shaft 9 and the driven shaft 10 are distributed in parallel at intervals inside the glue storage tank 2, and both of them are provided with a number of stirring blades 11 on their circumferential outer walls.

[0056] The driving device of the stirring mechanism 3 further includes a driving gear 12 and a driven gear 13. The driving gear 12 is located outside the glue storage tank 2 and is sleeved and connected to one end of the driving shaft 9. The other end of the driving shaft 9 is rotatably connected to the inner wall of the glue storage tank 2. The driven gear 13, which meshes with the driving gear 12, is fixedly sleeved on one end of the driven shaft 10.

[0057] A liquid level monitoring box 17 is located on one side inside the glue storage tank 2. The liquid level monitoring box 17 is electrically connected to a buzzer 18 and a warning light 19. The liquid level monitoring box 17 further includes a box body 171, a connecting rod 20, and a clamping cylinder 21. The top of the box body 171 has a through hole 22 for the connecting rod 20 to slide up and down. The top of the connecting rod 20 has a float 23, and the bottom end is fixedly provided with an upper mounting plate 24. The lower surface of the upper mounting plate 24 is provided with a series of spacers. First electrical connector A261, second electrical connector A271, and a lower mounting plate 25 located below the upper mounting plate 24 are fixed to the inner wall of the housing 171. The upper surface of the lower mounting plate 25 is provided with first electrical connector B262 and second electrical connector B272 at intervals. An electric slide 28 is vertically arranged on one side of the inner wall of the housing 171. The aforementioned clamping cylinder 21 is installed on the moving end of the electric slide 28, and the aforementioned connecting rod 20 is located between the grippers 211 of the clamping cylinder 21.

[0058] The first electrical connector A261 and the first electrical connector B262 are electrically connected to the electric slide table 28 and the clamping cylinder 21, and the second electrical connector A271 and the second electrical connector B272 are electrically connected to the buzzer 18 and the warning light 19.

[0059] As the adhesive in the storage tank 2 gradually decreases during the coating process, the float 23 decreases as the adhesive level drops. However, because the adhesive is stirred by the stirring mechanism, the surface of the adhesive is not static, and the float 23 has a certain vertical floating distance.

[0060] When the adhesive capacity in the glue storage tank 2 is sufficient, the float 23 moves up and down, driving the upper mounting plate 24 to move up and down through the connecting rod 20. The float 23 cannot make the upper mounting plate 24 and the lower mounting plate 25 contact each other within the up and down floating distance.

[0061] The transmission device 8 further includes a first transmission wheel 14, a second transmission wheel 15, and a transmission belt 16. The first transmission wheel 14 is installed at the end of the coating roller 6, and the second transmission wheel 15 is disposed at the end of the drive shaft 9. The first transmission wheel 14 and the second transmission wheel 15 are connected by the transmission belt 16.

[0062] During the coating process, the second motor 7 drives the coating roller 6 to rotate. The rotation of the coating roller 6 drives the first transmission wheel 14 to rotate, which in turn drives the second transmission wheel 15 to rotate via the transmission belt 16. This drives the drive shaft 9 to rotate. The drive shaft 9 drives the driven shaft 10 to rotate in opposite directions via the drive gear 12 and the driven gear 13. This causes the stirring blades 11 on the drive shaft 9 and the driven shaft 10 to rotate clockwise and counterclockwise, respectively. This allows the stirring blades 11 to more thoroughly mix the adhesive in the glue storage tank 2.

[0063] This avoids issues like drying and clumping due to prolonged static conditions, facilitating subsequent coating. Furthermore, the second motor 7, powered by the rotation of the coating roller 6, drives the stirring mechanism, saving resources and costs, and enhancing equipment connectivity.

[0064] A feed inlet 29 is provided on one side of the housing 1, and a discharge outlet 30 is provided on the upper part of the other side of the housing 1. A feed roller 31 and a winding roller 32 are respectively provided at the feed inlet 29 and the discharge outlet 30. One end of the winding roller 32 is fixedly connected to the output shaft of a first motor 33.

[0065] A first guide roller 34 and a second guide roller 35 are provided above the glue storage tank 2 and on the side near the discharge port 30. The first guide roller 34 and the second guide roller 35 are distributed above and below each other.

[0066] The first guide roller 34 is located below the second guide roller 35.

[0067] A controller 38 is electrically connected to a first motor 33, a second motor 7, a clamping cylinder 21, an electric slide 28, a buzzer 18, and a warning light 19.

[0068] The aforementioned feeding roller 31 and winding roller 32 are respectively mounted on a mounting frame 37; the aforementioned first motor 33 is mounted on the side wall of the mounting frame 37.

[0069] The working principle is as follows: When in use, the feeding roller 31 provides a protective film to the inside of the outer shell 1 through the feed port 29. The protective film completes the coating of the adhesive layer between the coating roller 6 and the glue pressing roller 5. After the adhesive layer is coated on the coating roller 6, the protective film passes through the right side of the first guide roller 34 and the left side of the second guide roller 35 so that it is in a vertical state between the first guide roller 34 and the second guide roller 35. The scraper 36 scrapes off the excess adhesive and makes the adhesive evenly distributed on the protective film. The excess adhesive slides into the glue storage tank 2 due to gravity, so that the excess adhesive can be reused, avoiding waste, and preventing the scraped adhesive from splashing and accumulating everywhere and polluting the working environment. Finally, the material is discharged from the discharge port 30, and then the first motor 33 drives the winding roller 32 to rotate and rewind onto the winding roller 32.

[0070] During the coating process, the second motor 7 drives the coating roller 6 to rotate. The rotation of the coating roller 6 drives the first transmission wheel 14 to rotate, which in turn drives the second transmission wheel 15 to rotate via the transmission belt 16. This drives the drive shaft 9 to rotate. The drive shaft 9 drives the driven shaft 10 to rotate in opposite directions via the drive gear 12 and the driven gear 13. This causes the stirring blades 11 on the drive shaft 9 and the driven shaft 10 to rotate clockwise and counterclockwise, respectively. This allows the stirring blades 11 to more thoroughly mix the adhesive in the glue storage tank 2, preventing it from drying and clumping due to prolonged static conditions. This facilitates subsequent coating. Furthermore, the second motor 7 uses the power of the coating roller 6 to drive the stirring mechanism, saving resources and costs, and enhancing the equipment's interconnectivity.

[0071] As the adhesive in the storage tank 2 gradually decreases during the coating process, the float 23 decreases as the adhesive level drops. However, because the adhesive is stirred by the stirring mechanism, the surface of the adhesive is not static, and the float 23 has a certain vertical floating distance.

[0072] When the adhesive capacity in the glue storage tank 2 is sufficient, the float 23 moves up and down, driving the upper mounting plate 24 to move up and down through the connecting rod 20. The float 23 cannot make the upper mounting plate 24 and the lower mounting plate 25 contact each other within the up and down floating distance.

[0073] When the adhesive capacity in the glue storage tank 2 is insufficient, when the float 23 is briefly at its lowest position, the upper mounting plate 24 and the lower mounting plate 25 will come into contact. This will cause the first electrical connector A261 and the first electrical connector B262 to briefly come into contact, issuing an immediate command to the controller 38 to control the electric slide 28 and the clamping cylinder 21 to briefly start. The clamping cylinder 21 drives the two grippers 211 to move towards each other to clamp the connecting rod 20. The electric slide 28 drives the clamping cylinder 21 to move downward, which in turn drives the connecting rod 20 downward until the upper mounting plate 24 and the lower mounting plate 25 come into contact. At this time, the second electrical connector A271 and the second electrical connector B272 are in contact for a long time, issuing a long-term command to the controller 5 to control the buzzer 18 and the warning light 19 to start. The buzzer 18 and the warning light 19 are always in working condition, reminding the staff to add adhesive in time. There is no need for manual periodic observation of the adhesive in the glue storage tank 2, which prevents the situation of forgetting to observe and adding adhesive in time, and ensures that the coating can be carried out normally.

[0074] When using the above-mentioned coating equipment for protective films, the coating equipment for protective films of the present invention has a drive shaft and a driven shaft that are parallel and spaced apart inside the glue storage tank. Both shafts have several stirring blades on their circumferential outer walls. The drive gear is located outside the glue storage tank and is fitted and connected to one end of the drive shaft. The driven gear that meshes with the drive gear is fixedly fitted to one end of the driven shaft. The first rotating wheel is installed at the end of the coating roller, and the second transmission wheel is located at the end of the drive shaft. The first transmission wheel and the second transmission wheel are connected by a transmission belt. This can achieve sufficient stirring of the glue liquid in the glue storage tank, effectively avoiding the glue liquid from drying and clumping due to being in a static state for a long time. The second motor can drive the coating roller and the drive shaft to rotate simultaneously, which also saves resources and reduces costs.

[0075] Furthermore, the liquid level monitoring box is electrically connected to a buzzer and an alarm light. A through hole is provided at the top of the box for the connecting rod to slide up and down. A float is located at the top of the connecting rod, and an upper mounting plate is fixedly mounted at its bottom. A lower mounting plate, located below the upper mounting plate, is fixed to the inner wall of the box. An electric slide is vertically mounted on one side of the inner wall of the box. A clamping cylinder is mounted on the moving end of the electric slide. The connecting rod is located between the grippers of the clamping cylinder. Electrical connections are established between the first and second electrical connectors A on the lower surface of the upper mounting plate and the first and second electrical connectors B on the upper surface of the lower mounting plate. This controls the clamping cylinder to hold the connecting rod, ensuring a stable connection between the upper and lower mounting plates. This effectively prevents the float from moving up and down with the churning adhesive liquid, which could lead to unstable electrical connections. It also monitors fluctuating liquid levels. When the adhesive level is insufficient, a buzzer and alarm light alert personnel, allowing them to add adhesive promptly and preventing machine downtime due to insufficient adhesive, thus improving overall coating efficiency.

[0076] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A coating apparatus for a protective film, comprising: The shell (1) is characterized in that: a glue storage tank (2) with a stirring mechanism (3) is provided at the bottom of the shell (1), and a vertical plate (4) is provided on each side of the glue storage tank (2). A glue pressing roller (5) is provided between the two opposing vertical plates (4) and above the glue storage tank (2). A coating roller (6) rotatably connected to the vertical plate (4) is provided between the glue pressing roller (5) and the glue storage tank (2). A second motor (7) is installed on the outer wall of the housing (1). The output shaft of the second motor (7) is fixedly connected to one end of the coating roller (6). The other end of the coating roller (6) is connected to the drive device of the stirring mechanism (3) through a transmission device (8). The stirring mechanism (3) further includes a drive shaft (9), a driven shaft (10) and stirring blades (11). The drive shaft (9) and the driven shaft (10) are distributed in parallel at intervals inside the glue storage tank (2), and both of them are provided with a number of stirring blades (11) on their circumferential outer walls. The driving device of the stirring mechanism (3) further includes a driving gear (12) and a driven gear (13). The driving gear (12) is located outside the glue storage tank (2) and is sleeved and connected to one end of the driving shaft (9). The other end of the driving shaft (9) is rotatably connected to the inner wall of the glue storage tank (2). The driven gear (13) meshing with the driving gear (12) is fixedly sleeved on one end of the driven shaft (10). A liquid level monitoring box (17) is located on one side inside the glue storage tank (2). The liquid level monitoring box (17) is electrically connected to a buzzer (18) and a warning light (19). The liquid level monitoring box (17) further includes a box body (171), a connecting rod (20), and a clamping cylinder (21). The top of the box body (171) has a through hole (22) for the connecting rod (20) to slide up and down. The top of the connecting rod (20) has a float (23), and the bottom end of the connecting rod (20) is fixedly provided with an upper mounting plate (24). The lower surface of the upper mounting plate (24) is provided with intervals. A first electrical connector A (261) and a second electrical connector A (271) are provided. A lower mounting plate (25) located below the upper mounting plate (24) is fixed on the inner wall of the box body (171). The upper surface of the lower mounting plate (25) is provided with a first electrical connector B (262) and a second electrical connector B (272) at intervals. An electric slide (28) is vertically provided on one side of the inner wall of the box body (171). The clamping cylinder (21) is installed on the moving end of the electric slide (28). The connecting rod (20) is located between the clamping claws (211) of the clamping cylinder (21). The first electrical connector A (261) and the first electrical connector B (262) are electrically connected to the electric slide (28) and the clamping cylinder (21), and the second electrical connector A (271) and the second electrical connector B (272) are electrically connected to the buzzer (18) and the warning light (19).

2. The coating equipment for protective films according to claim 1, characterized in that: The transmission device (8) further includes a first transmission wheel (14), a second transmission wheel (15) and a transmission belt (16). The first transmission wheel (14) is installed at the end of the coating roller (6), and the second transmission wheel (15) is located at the end of the drive shaft (9). The first transmission wheel (14) and the second transmission wheel (15) are connected by the transmission belt (16).

3. The coating apparatus for protective films according to claim 1 or 2, characterized in that: A feed inlet (29) is provided on one side of the housing (1), and a discharge outlet (30) is provided on the upper part of the other side of the housing (1). A feed roller (31) and a winding roller (32) are respectively provided at the feed inlet (29) and the discharge outlet (30). One end of the winding roller (32) is fixedly connected to the output shaft of a first motor (33).

4. The coating equipment for protective films according to claim 3, characterized in that: A first guide roller (34) and a second guide roller (35) are provided above the glue storage tank (2) and on the side near the discharge port (30). The first guide roller (34) and the second guide roller (35) are distributed on the upper and lower sides.

5. The coating apparatus for protective films according to claim 4, characterized in that: The first guide roller (34) is located below the second guide roller (35).

6. The coating apparatus for protective films according to claim 5, characterized in that: A scraper (36) is positioned between the first guide roller (34) and the second guide roller (35).

7. The coating apparatus for protective films according to claim 5, characterized in that: A controller (38) is electrically connected to a first motor (33), a second motor (7), a clamping cylinder (21), an electric slide (28), a buzzer (18), and a warning light (19).

Images