Coating mechanism for irregular partition paper protective film

Abstract

The invention belongs to the technical field of protective film coating, and particularly relates to a coating mechanism for an irregular partition paper protective film, which comprises a glue storage barrel, a fixed seat is arranged above the glue storage barrel, two ends of the fixed seat are connected through a lifting mechanism, and the lifting mechanism is used for adjusting the height between the fixed seat and the glue storage barrel. The side wall of the fixed seat is fixedly connected with a side plate; a silica gel scraper and cotton cloth are driven by a lifting frame to make contact with a protective film, then the protective film is output, during output, a second motor is started, a two-way lead screw is driven by an output shaft of the second motor to rotate, two moving plates are driven by the two-way lead screw to move, connecting blocks are driven by the moving plates to move, and the connecting blocks are in a bent shape; the distance between the two silica gel scrapers is larger than that of the cotton cloth; and in the movement process of the connecting block, redundant glue is scraped through a silica gel scraper, then the glue scraping position is wiped through cotton cloth, and thorough removal of the glue is achieved.

Description

Technical Field

[0001] This invention relates to the field of protective film coating technology, and in particular to a coating mechanism for irregular paper protective films. Background Technology

[0002] In many industrial production and product packaging processes, a protective film is often needed between the product and the external environment to protect the product surface from scratches, contamination, or other damage. For some irregularly shaped products, the separator paper used also needs to be irregularly shaped to ensure a tight fit and effective protection.

[0003] A Chinese patent with publication number CN218423924U discloses a protective film coating device. One end of a take-up roller is fixedly connected to the output shaft of a first motor. A glue storage tank is located at the bottom of a housing. A pressure roller is positioned between two opposing vertical plates, near the feed inlet. A coating roller, rotatably connected to the vertical plates, is positioned between the pressure roller and the glue storage tank. A second motor is mounted on the outer wall of the housing, and its output shaft is fixedly connected to one end of the coating roller. A first guide roller and a second guide roller are positioned above the glue storage tank, near the discharge outlet. A drying chamber with a feed inlet is positioned between these upper and lower guide rollers, located on the top and bottom walls of the drying chamber. A scraper is positioned between the first guide roller and the drying chamber. This configuration allows for the drying and curing of the adhesive on the protective film and also enables automatic winding of the protective film, significantly improving the winding efficiency.

[0004] In current technology, the coating width of the coating roller is fixed during coating. However, the shape of irregular spacers varies. For narrower parts of irregular spacers, glue may overflow onto the other side of the spacer. If the glue is not cleaned up in time, it can easily cause sticking during winding, thus affecting the use of the spacers. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the problem in the prior art that glue overflows to the other side of the separator paper, causing adhesion during winding, thereby providing a coating mechanism for a protective film for irregular separator paper.

[0006] To solve the above-mentioned technical problems, the present invention provides a coating mechanism for irregular paper protective film, including a glue storage tank, a fixed base above the glue storage tank, and a lifting mechanism connecting the two ends of the fixed base. The lifting mechanism is used to adjust the height between the fixed base and the glue storage tank. A side plate is fixedly connected to the side wall of the fixed base, and a third electric push rod is fixedly connected to the top of the side plate. The output end of the third electric push rod passes through the side plate and is fixedly connected to a lifting frame. A bidirectional lead screw is rotatably connected to the bottom of the lifting frame through a bearing seat. Two moving plates are threadedly connected to the bidirectional lead screw. A connecting block is fixedly connected to the bottom of each moving plate. A silicone scraper is fixedly connected to one end of each connecting block near the glue storage tank, and cotton cloth is fixedly connected to the other end of each connecting block. A second motor is fixedly connected to the side wall of the lifting frame, and the output shaft of the second motor is fixedly connected to one end of the bidirectional lead screw.

[0007] In one embodiment of the present invention, two third vertical rods are fixedly connected to the top of the lifting frame, and the third vertical rods are slidably connected to the side plates; two horizontal rods are fixedly connected between the two inner side walls at the bottom of the lifting frame, and the moving plates are slidably connected to the two horizontal rods.

[0008] In one embodiment of the present invention, a second electric push rod is fixedly connected to the top of the fixed base, and a mounting base is fixedly connected to the output end of the second electric push rod. Two first vertical rods are fixedly connected to the top of the mounting base, and the first vertical rods are slidably connected to the fixed base. A conveying roller is rotatably connected between the inner walls of the bottom end of the mounting base through a roller shaft, and a first drive motor is provided at one end of the conveying roller.

[0009] In one embodiment of the present invention, the top of the mounting base has two sliding openings, each of which is fixedly connected to a second vertical rod. Each of the second vertical rods is slidably connected to a slider. Each of the second vertical rods is fitted with a spring on its outer side. The two ends of the springs are respectively fixed to the bottom inner wall of the sliding opening and the bottom of the slider. A dust removal roller is rotatably connected between the two sliders via a rotating shaft.

[0010] In one embodiment of the present invention, the lifting mechanism includes two fixed frames fixedly connected to the top of both ends of the glue storage tank. A first motor is fixedly connected to the top of each fixed frame. A reciprocating lead screw is fixedly connected to the output shaft of each first motor. Both ends of the reciprocating lead screw are rotatably connected to the fixed frame through bearings. A movable frame is threadedly connected to each reciprocating lead screw. Both ends of the fixed seat are respectively fixedly connected to the two movable frames. Two guide rods are fixedly connected to each lifting frame. The lifting frame is slidably connected to the two guide rods.

[0011] In one embodiment of the present invention, a glue-applying roller is rotatably connected between the two lifting frames via a roller shaft, and a second drive motor is provided at one end of the glue-applying roller.

[0012] In one embodiment of the present invention, a fixing plate is fixedly connected to the side wall of the lifting frame away from the side plate, and a mounting frame is fixedly connected to the side wall of the fixing plate. A threaded rod is rotatably connected to the mounting frame via a bearing, and a connecting plate is threadedly connected to the threaded rod. A scraper is fixedly connected to the bottom of the connecting plate. Two limiting rods are fixedly connected between the fixing plate and the mounting frame, and the connecting plate is slidably connected to the two limiting rods. A rotating block is fixedly connected to one end of the threaded rod.

[0013] In one embodiment of the present invention, a first electric push rod is fixedly connected to the top end of the scraper, and a scraper is fixedly connected to the output end of the first electric push rod. The scraper and the contact surface of the scraper are in close contact. Two slide rods are fixedly connected to the top of the scraper, and the slide rods are slidably connected on the scraper.

[0014] In one embodiment of the present invention, the end of the lifting frame away from the glue storage tank is rotatably connected to a guide roller via a rotating shaft.

[0015] In one embodiment of the present invention, a distance sensor is fixedly connected to the bottom of one of the lifting frames for monitoring the distance to the adhesive surface; a level gauge is fixedly connected to the top of the adhesive storage tank for monitoring the real-time level of the adhesive.

[0016] Compared with the prior art, the above-described technical solution of the present invention has the following advantages:

[0017] The present invention discloses a coating mechanism for irregular paper protective film. This mechanism includes a scraper and a cotton cloth. Activating a third electric push rod drives a lifting frame, which in turn moves the silicone scraper and cotton cloth to contact the protective film before outputting the film. During output, a second motor is activated, and its output shaft drives a bidirectional lead screw to rotate. The lead screw then moves two moving plates, which in turn move a connecting block. The connecting block is bent, and the distance between the two silicone scrapers is greater than that between the cotton cloth. This allows the silicone scraper to remove excess adhesive during the movement of the connecting block, followed by wiping the scraped area with the cotton cloth, thus achieving thorough removal of the adhesive.

[0018] The present invention discloses a coating mechanism for irregular paper protective film, which includes a dust removal roller for cleaning dust from the surface of the protective film. During the conveying process, the protective film passes between the dust removal roller and the conveying roller, and the spring facilitates the passage of protective films of different thicknesses. The conveying roller drives the protective film to be conveyed, and the protective film drives the dust removal roller to rotate in the opposite direction. During the rotation, the dust removal roller removes dust from the protective film.

[0019] The present invention discloses a coating mechanism for irregular paper protective film. A scraper is used to remove excess adhesive from the coating roller. Rotating a rotating block drives a threaded rod, which in turn moves a connecting plate, which in turn moves the scraper until it is adjusted to a suitable position. This ensures uniform adhesive distribution on the coating roller, thereby improving the coating effect. A first electric push rod is activated, and its output drives a scraper to remove excess adhesive from the scraper. Attached Figure Description

[0020] To make the content of this invention easier to understand, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0021] Figure 1 This is a perspective view of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of the coating roller and the conveying roller in this invention;

[0023] Figure 3 This is a schematic diagram of the fixed base structure in this invention;

[0024] Figure 4 This is a schematic diagram of the adhesive scraper in this invention;

[0025] Figure 5 This is a schematic diagram of the mounting bracket in this invention;

[0026] Figure 6 This is a schematic diagram of the guide roller structure in this invention;

[0027] Figure 7 This is a schematic diagram of the structure of the movable plate in this invention;

[0028] Figure 8 This is a schematic diagram of the dust removal roller in this invention.

[0029] Explanation of reference numerals in the accompanying drawings: 1. Glue storage tank; 11. Level gauge; 2. Fixing frame; 21. First motor; 22. Guide rod; 23. Reciprocating lead screw; 24. Moving frame; 25. Glue application roller; 26. Fixing plate; 261. Mounting frame; 262. Rotary block; 263. Threaded rod; 264. Limiting rod; 265. Connecting plate; 266. Glue scraper; 267. First electric push rod; 268. Scraper; 269. Sliding rod; 27. Distance sensor; 3. Fixed base; 31. Second electric push rod; 32. Conveyor roller; 33. Mounting base; 34. Dust removal roller; 35. First vertical rod; 36. Slider; 37. Second vertical rod; 38. Spring; 4. Side plate; 41. Third electric push rod; 42. Third vertical rod; 43. Lifting frame; 44. Guide roller; 45. Second motor; 46. Bidirectional lead screw; 47. Crossbar; 48. Moving plate; 49. Connecting block; 410. Silicone scraper; 411. Cotton cloth. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention.

[0031] like Figures 1 to 8 As shown in the embodiment of the present invention, a coating mechanism for irregular paper protective film includes a glue storage tank 1. A fixed base 3 is provided above the glue storage tank 1. The two ends of the fixed base 3 are connected by a lifting mechanism. The lifting mechanism is used to adjust the height between the fixed base 3 and the glue storage tank 1. A side plate 4 is fixedly connected to the side wall of the fixed base 3. A third electric push rod 41 is fixedly connected to the top of the side plate 4. The output end of the third electric push rod 41 passes through the side plate 4 and is fixedly connected to a lifting frame 43. A bidirectional lead screw 46 is rotatably connected to the bottom end of the lifting frame 43 through a bearing seat. Two moving plates 48 are threadedly connected to the bidirectional lead screw 46. A connecting block 49 is fixedly connected to the bottom of each moving plate 48. A silicone scraper 410 is fixedly connected to one end of each connecting block 49 near the glue storage tank 1. A cotton cloth 411 is fixedly connected to the other end of each connecting block 49. A second motor 45 is fixedly connected to the side wall of the lifting frame 43. The output shaft of the second motor 45 is fixedly connected to one end of the bidirectional lead screw 46.

[0032] During coating, the coating width of the coating roller is fixed, but the size and shape of the irregular spacer paper vary. During the coating process, glue may overflow onto the other side of the spacer paper. If the glue is not cleaned up in time, it can easily cause adhesion during winding, affecting the use of the spacer paper. The silicone scraper 410 and cotton cloth 411 provided in this invention are used to scrape off excess glue with the silicone scraper 410 and then wipe with the cotton cloth 411. Specifically, the coated irregular spacer paper protective film is output. Before output, the positions of the silicone scraper 410 and cotton cloth 411 need to be adjusted. By activating the third electric push rod 41, the output end of the third electric push rod 41 drives the lifting frame 43 to move. The lifting frame 43 then moves the silicone scraper 410 and cotton cloth 411 to the protective film. The protective film contacts the substrate and then outputs it. During output, the second motor 45 is activated, and the output shaft of the second motor 45 drives the bidirectional lead screw 46 to rotate. The bidirectional lead screw 46 drives the two moving plates 48 to move, and the moving plates 48 drive the connecting blocks 49 to move. The connecting blocks 49 are bent. Two of the connecting blocks 49 are fixed to the silicone scraper 410 at the end near the glue storage tank 1, and the two connecting blocks 49 are fixed to the cotton cloth 411 at the end away from the glue storage tank 1. The two silicone scrapers 410 are connected to each other. The distance is greater than that of the cotton cloth 411; this facilitates the movement of the connecting block 49. First, the excess glue is scraped off by the silicone scraper 410, and then the scraped area is wiped by the cotton cloth 411 to completely remove the glue. Then, the third electric push rod 41 is activated, and the output end of the third electric push rod 41 drives the lifting frame 43 to move upward, so that the silicone scraper 410 and the cotton cloth 411 move away from the protective film. At the same time, the second motor 45 drives the two connecting blocks 49 to move towards the middle until the two connecting blocks 49 contact each other. The lifting frame 43 is driven again to drive the silicone scraper 410 and the cotton cloth 411 to contact the protective film for the next scraping and wiping. This process is repeated to remove excess glue from the back of the paper. After cleaning, the paper is dried by the drying mechanism and then wound up by the winding mechanism to complete the entire process of coating and winding the protective film. The details are not elaborated here. The winding mechanism also helps to keep one end of the protective film balanced and straight, which facilitates the better operation of the silicone scraper 410 and the cotton cloth 411.

[0033] like Figure 6 As shown, the top of the lifting frame 43 is fixedly connected to two third vertical rods 42, and the third vertical rods 42 are slidably connected on the side plate 4; the bottom of the lifting frame 43 is fixedly connected to two inner side walls with two horizontal rods 47, and the moving plate 48 is slidably connected on the two horizontal rods 47.

[0034] When the lifting frame 43 provided by the present invention is in motion, the lifting frame 43 drives the third vertical rod 42 to move, and the third vertical rod 42 limits the lifting frame 43 to move in the vertical direction; during the movement, the moving plate 48 is limited to move in the axial direction by two horizontal rods 47.

[0035] like Figure 3 As shown, a second electric push rod 31 is fixedly connected to the top of the fixed base 3, and a mounting base 33 is fixedly connected to the output end of the second electric push rod 31. Two first vertical rods 35 are fixedly connected to the top of the mounting base 33. The first vertical rods 35 are slidably connected to the fixed base 3. A conveying roller 32 is rotatably connected between the inner walls of the bottom end of the mounting base 33 through a roller shaft. A first drive motor is provided at one end of the conveying roller 32.

[0036] The conveying roller 32 provided by this invention is used to wind and convey the protective film. Since the separator paper and the protective film have different thicknesses, it is necessary to adjust the height of the conveying roller 32 to bring the protective film into contact with the coating roller 25 for easy coating. When adjusting the height, the second electric push rod 31 is turned on, and the output end of the second electric push rod 31 drives the mounting base 33 to move, which in turn drives the conveying roller 32 to move until the appropriate height is reached. During conveying, the first drive motor needs to be turned on, which drives the conveying roller 32 to rotate, and the conveying roller 32 drives the orderly conveying of the protective film.

[0037] like Figure 8 As shown, the top of the mounting base 33 has two sliding openings, and a second vertical rod 37 is fixedly connected to each of the sliding openings. A slider 36 is slidably connected to each of the second vertical rods 37. A spring 38 is sleeved on the outside of each of the second vertical rods 37. The two ends of the spring 38 are respectively fixed to the bottom inner wall of the sliding opening and the bottom of the slider 36. A dust removal roller 34 is rotatably connected between the two sliders 36 through a rotating shaft.

[0038] The dust removal roller 34 provided by the present invention is used to clean the dust on the surface of the protective film during use. During the conveying process of the protective film, the protective film passes between the dust removal roller 34 and the conveying roller 32. The spring 38 facilitates the passage of protective films of different thicknesses. The protective film is conveyed by the conveying roller 32, and the protective film drives the dust removal roller 34 to rotate in the opposite direction. During the rotation, the dust removal roller 34 removes dust from the protective film.

[0039] like Figure 2As shown, the lifting mechanism includes two fixed frames 2 fixed to the top of both ends of the glue storage tank 1. A first motor 21 is fixed to the top of each fixed frame 2. A reciprocating screw 23 is fixed to the output shaft of each first motor 21. Both ends of the reciprocating screw 23 are rotatably connected to the fixed frame 2 via bearings. A movable frame 24 is threaded onto each reciprocating screw 23. Both ends of the fixed seat 3 are fixed to the two movable frames 24 respectively. Two guide rods 22 are fixed to each lifting frame 43. The lifting frame 43 is slidably connected to the two guide rods 22.

[0040] The lifting mechanism provided by the present invention is used to adjust the distance between the glue roller 25 and the glue during use. By turning on the first motor 21, the output shaft of the first motor 21 drives the reciprocating screw 23 to rotate, and the reciprocating screw 23 drives the moving frame 24 to move. During the movement, the moving frame 24 slides on two guide rods 22. The guide rods 22 limit the movement of the moving frame 24 in the horizontal direction until it is adjusted to a suitable height.

[0041] like Figure 3 As shown, a glue-applying roller 25 is rotatably connected between the two lifting frames 43 via a roller shaft, and a second drive motor is provided at one end of the glue-applying roller 25.

[0042] The glue-applying roller 25 provided by the present invention is used to contact the glue in the glue storage tank 1 and then transfer the glue on the surface to coat the protective film. The glue-applying roller 25 is rotated and coated by a second drive motor during operation.

[0043] Such as 4 and Figure 5 As shown, a fixing plate 26 is fixedly connected to the side wall of the lifting frame 43 away from the side plate 4. A mounting bracket 261 is fixedly connected to the side wall of the fixing plate 26. A threaded rod 263 is rotatably connected to the mounting bracket 261 via a bearing. A connecting plate 265 is threadedly connected to the threaded rod 263. A scraper 266 is fixedly connected to the bottom of the connecting plate 265. Two limiting rods 264 are fixedly connected between the fixing plate 26 and the mounting bracket 261. The connecting plate 265 is slidably connected to the two limiting rods 264. A rotating block 262 is fixedly connected to one end of the threaded rod 263.

[0044] The scraper blade 266 provided by this invention is used to scrape off excess glue from the coating roller 25. Since the amount of glue required for different sizes of paper release films varies, the position of the scraper blade 266 needs to be finely adjusted. By rotating the rotating block 262, the rotating block 262 drives the threaded rod 263 to rotate, the threaded rod 263 drives the connecting plate 265 to move, and the connecting plate 265 drives the scraper blade 266 to move until it is adjusted to a suitable position, so as to maintain the uniformity of glue on the coating roller 25 and thus improve the coating effect.

[0045] like Figure 5 As shown, a first electric push rod 267 is fixedly connected to the top of the scraper 266, and a scraper 268 is fixedly connected to the output end of the first electric push rod 267. The scraper 268 and the contact surface of the scraper 266 are in close contact. Two sliding rods 269 are fixedly connected to the top of the scraper 266, and the sliding rods 269 are slidably connected on the scraper 266.

[0046] The scraper 268 provided by this invention is used to scrape off excess glue from the scraper blade 266. After coating for a period of time, when it is necessary to stop the machine for rest or change different interlayer paper, if the excess glue on the scraper blade 266 is not cleaned in time, it may cool and solidify on the head of the scraper blade 266. This not only affects the size of the scraper blade 266, but also the glue may be uneven, causing a grainy coating and affecting the coating. Therefore, after stopping the machine, it is necessary to turn on the first electric push rod 267. The output end of the first electric push rod 267 drives the scraper 268 to move, and the scraper 268 scrapes off the excess glue from the scraper blade 266.

[0047] like Figure 6 As shown, the end of the lifting frame 43 away from the glue storage tank 1 is rotatably connected to the guide roller 44 via a rotating shaft.

[0048] The guide roller 44 provided by the present invention is flush with the height of the conveying roller 32 during use, thereby straightening the protective film between the conveying roller 32 and the guide roller 44 horizontally, which facilitates scraping and wiping.

[0049] like Figure 1 and Figure 3 As shown, a distance sensor 27 is fixedly connected to the bottom of one of the lifting frames 43 to monitor the distance to the glue surface; a level gauge 11 is fixedly connected to the top of the glue storage tank 1 to monitor the real-time level of the glue.

[0050] The distance sensor 27 provided by this invention is used to monitor the distance to the glue surface during use, so as to adjust the glue roller 25 to a suitable height and maintain the continuity of glue application; the real-time liquid level of the glue is monitored by the liquid level gauge 11, and when the liquid level of the glue is lower than the set threshold, an alarm is triggered in time to remind the staff to add glue.

[0051] Working principle: By turning on the first motor 21, the output shaft of the first motor 21 drives the reciprocating screw 23 to rotate, which in turn drives the moving frame 24 to move. During the movement, the moving frame 24 slides on two guide rods 22, which limit the movement of the moving frame 24 in the horizontal direction until it is adjusted to a suitable height. The glue-applying roller 25 contacts the glue in the glue storage tank 1 and then transfers the glue on the surface to coat the protective film. The conveying roller 32 is used to wind and convey the protective film. Since the separator paper and the protective film have different thicknesses, the height of the conveying roller 32 needs to be adjusted to ensure that the protective film contacts the glue-applying roller 25 for easy coating. When adjusting the height, the second electric push rod 31 is turned on, and the output end of the second electric push rod 31 drives the mounting base 33 to move, which in turn drives the conveying roller 32 to move until it is adjusted to a suitable height. During conveying, the first drive motor needs to be turned on, which drives the conveying roller 32 to rotate, and the conveying roller 32 drives the orderly conveying of the protective film.

[0052] The coated irregular protective film is then output. Before output, the positions of the silicone squeegee 410 and cotton cloth 411 need to be adjusted. By activating the third electric push rod 41, the output end of the third electric push rod 41 drives the lifting frame 43 to move. The lifting frame 43 drives the silicone squeegee 410 and cotton cloth 411 to contact the protective film before outputting the protective film. During output, the second motor 45 is activated, and the output shaft of the second motor 45 drives the bidirectional lead screw 46 to rotate. The bidirectional lead screw 46 drives the two moving plates 48 to move, and the moving plates 48 drive the connecting blocks 49 to move. The connecting blocks 49 are bent, with the silicone squeegee 410 fixed to one end of the two connecting blocks 49 near the glue storage tank 1, and the cotton cloth 411 fixed to the other end of the two connecting blocks 49 away from the glue storage tank 1. The distance between the two silicone squeegees 410 is greater than that between the cotton cloth 411. This facilitates the connection blocks 49 moving by first passing through the silicone squeegee... The blade 410 scrapes off excess glue, and then the scraped area is wiped with a cotton cloth 411 to completely remove the glue. Then, the third electric push rod 41 is activated, and the output end of the third electric push rod 41 drives the lifting frame 43 to move upward, so that the silicone scraper 410 and the cotton cloth 411 are away from the protective film. At the same time, the second motor 45 drives the two connecting blocks 49 to move towards the center until the two connecting blocks 49 contact each other. The lifting frame 43 is driven again to drive the silicone scraper 410 and the cotton cloth 411 to contact the protective film for the next scraping and wiping. This process is repeated to remove excess glue from the back of the paper. After cleaning, the paper is dried by the drying mechanism and then wound up by the winding mechanism to complete the entire process of coating and winding the protective film. The winding mechanism also helps to keep one end of the protective film balanced and straight, which facilitates the better operation of the silicone scraper 410 and the cotton cloth 411.

[0053] During the conveying process of the protective film, the protective film passes between the dust removal roller 34 and the conveying roller 32. The spring 38 facilitates the passage of protective films of different thicknesses. The protective film is conveyed by the conveying roller 32, and the protective film drives the dust removal roller 34 to rotate in the opposite direction. During the rotation, the dust removal roller 34 removes dust from the protective film.

[0054] Since different sizes of protective film require different amounts of adhesive, the position of the scraper blade 266 needs to be fine-tuned. This is done by rotating the rotary block 262, which in turn rotates the threaded rod 263, which in turn moves the connecting plate 265, which in turn moves the scraper blade 266, until it is adjusted to the appropriate position. This ensures uniform adhesive application on the coating roller 25, thereby improving the coating effect. When the machine needs to be stopped for rest or when changing to a different type of protective film, excess adhesive on the scraper blade 266 may solidify on its head if not cleaned promptly. This not only affects the size of the scraper blade 266 but may also result in uneven adhesive application, creating a grainy texture and hindering the coating process. Therefore, after stopping the machine, the first electric push rod 267 needs to be activated. The output end of the first electric push rod 267 drives the scraper 268 to remove excess adhesive from the scraper blade 266.

[0055] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A coating mechanism for irregular paper protective film, comprising a glue storage tank (1), a fixed seat (3) above the glue storage tank (1), the two ends of the fixed seat (3) being connected by a lifting mechanism, the lifting mechanism being used to adjust the height between the fixed seat (3) and the glue storage tank (1), a side plate (4) being fixedly connected to the side wall of the fixed seat (3), a third electric push rod (41) being fixedly connected to the top of the side plate (4), the output end of the third electric push rod (41) penetrating the side plate (4) and fixedly connected to a lifting frame (43); characterized in that: The bottom end of the lifting frame (43) is rotatably connected to a two-way lead screw (46) via a bearing seat. Two moving plates (48) are threaded onto the two-way lead screw (46). A connecting block (49) is fixedly connected to the bottom of each moving plate (48). A silicone scraper (410) is fixedly connected to one end of each connecting block (49) near the glue storage tank (1), and a cotton cloth (411) is fixedly connected to the other end of each connecting block (49). A second motor (45) is fixedly connected to the side wall of the lifting frame (43), and the output shaft of the second motor (45) is fixedly connected to one end of the two-way lead screw (46).

2. The coating mechanism for irregular paper protective film according to claim 1, characterized in that: The top of the lifting frame (43) is fixed with two third vertical rods (42), and the third vertical rods (42) are slidably connected on the side plate (4); the bottom of the lifting frame (43) is fixed with two horizontal rods (47) between the two inner side walls, and the moving plate (48) is slidably connected on the two horizontal rods (47).

3. The coating mechanism for irregular paper protective film according to claim 2, characterized in that: The top of the fixed base (3) is fixedly connected to a second electric push rod (31), and the output end of the second electric push rod (31) is fixedly connected to a mounting base (33). The top of the mounting base (33) is fixedly connected to two first vertical rods (35), and the first vertical rods (35) are slidably connected to the fixed base (3). The bottom inner wall of the mounting base (33) is rotatably connected to a conveying roller (32) through a roller shaft. One end of the conveying roller (32) is provided with a first drive motor.

4. A coating mechanism for irregular paper protective film according to claim 3, characterized in that: The mounting base (33) has two sliding openings at its top. A second vertical rod (37) is fixedly connected to each sliding opening. A slider (36) is slidably connected to each of the second vertical rods (37). A spring (38) is sleeved on the outside of each of the second vertical rods (37). The two ends of the spring (38) are fixedly connected to the bottom inner wall of the sliding opening and the bottom of the slider (36), respectively. A dust removal roller (34) is rotatably connected between the two sliders (36) through a rotating shaft.

5. A coating mechanism for irregular paper protective film according to claim 4, characterized in that: The lifting mechanism includes two fixed frames (2) fixed to the top of both ends of the glue storage tank (1). A first motor (21) is fixed to the top of each fixed frame (2). A reciprocating screw (23) is fixed to the output shaft of each first motor (21). Both ends of the reciprocating screw (23) are rotatably connected to the fixed frame (2) through bearings. A movable frame (24) is threaded onto each reciprocating screw (23). Both ends of the fixed seat (3) are fixed to the two movable frames (24). Two guide rods (22) are fixed to each lifting frame (43). The lifting frame (43) is slidably connected to the two guide rods (22).

6. A coating mechanism for irregular paper protective film according to claim 5, characterized in that: A glue-applying roller (25) is rotatably connected between the two lifting frames (43) via a roller shaft, and a second drive motor is provided at one end of the glue-applying roller (25).

7. A coating mechanism for irregular paper protective film according to claim 6, characterized in that: A fixing plate (26) is fixedly connected to the side wall away from the side plate (4) of the lifting frame (43). A mounting frame (261) is fixedly connected to the side wall of the fixing plate (26). A threaded rod (263) is rotatably connected to the mounting frame (261) via a bearing. A connecting plate (265) is threadedly connected to the threaded rod (263). A scraper (266) is fixedly connected to the bottom of the connecting plate (265). Two limiting rods (264) are fixedly connected between the fixing plate (26) and the mounting frame (261). The connecting plate (265) is slidably connected to the two limiting rods (264). A rotating block (262) is fixedly connected to one end of the threaded rod (263).

8. A coating mechanism for irregular paper protective film according to claim 7, characterized in that: The top end of the scraper (266) is fixedly connected to a first electric push rod (267), and the output end of the first electric push rod (267) is fixedly connected to a scraper (268). The scraper (268) and the contact surface of the scraper (266) are in close contact. The top of the scraper (266) is fixedly connected to two slide rods (269), and the slide rods (269) are slidably connected on the scraper (266).

9. A coating mechanism for irregular paper protective film according to claim 8, characterized in that: The lifting frame (43) is connected to a guide roller (44) at the end away from the glue storage tank (1) via a rotating shaft.

10. A coating mechanism for an irregularly shaped protective film according to claim 9, characterized in that: One of the lifting frames (43) is fixedly connected to the bottom of a distance sensor (27) for monitoring the distance to the glue surface; the glue storage tank (1) is fixedly connected to the top of a level gauge (11) for monitoring the real-time level of the glue.

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