Automatic gluing device for PVC printing film

Abstract

The present application relates to the technical field of printing film processing, and in particular to an automatic gluing device for PVC printing film, which comprises a bottom plate, a top frame fixedly connected to the upper side of the bottom plate, a first recessed plate fixedly connected to the upper side of the top frame, arrayed T-shaped sliding plates slidingly connected to one side of the first recessed plate, springs one arrayed between every two T-shaped sliding plates, a gluing nozzle rotatably connected to the inside of the T-shaped sliding plate through a rotating rod, an L-shaped plate fixedly connected to the lower side of the first recessed plate, and arrayed rotating shafts one rotatably connected to the upper side of the L-shaped plate, wherein the first motor is used to drive the double-head cam to rotate synchronously, the interval between each gluing nozzle is adjusted at equal intervals, different width PVC printing films are adapted, and the applicability is improved; the cam flat and the protruding part respectively define the minimum and maximum intervals, the frame plate is moved by the first electric push rod, the nozzle angle is flexibly adjusted, the spraying range is expanded, the gluing uniformity is improved, the demand for various processes is met, and the equipment flexibility adjustment capability and production efficiency are enhanced.

Description

Technical Field

[0001] This invention relates to the field of printing film processing technology, specifically an automated adhesive coating device for PVC printing film. Background Technology

[0002] Printed film processing is a process that uses printing technology to create patterns, text, colors, or functional coatings on various plastic film substrates. It is widely used in packaging, labeling, advertising, and industrial manufacturing. The essence of printed film lies in its combination of the physicochemical properties of the film material and the visual expressiveness of printing technology. Through precise printing processes, high-resolution images, vibrant colors, and complex designs can be achieved on the film surface. Printed film processing typically includes an adhesive coating process, and adhesive coating is one of the core steps in realizing the multiple composite functions and final applications of the film. In the processing of PVC printed film, the main functions of adhesive coating are twofold: First, as an adhesive layer, the adhesive is evenly applied to the film surface through gravure coating or roller coating, enabling it to be dry- or wet-laminated with substrates such as paper, other plastic films, or aluminum foil, thereby forming a multi-layer structure with high interlayer bonding strength to meet the packaging requirements for barrier properties, strength, or heat-sealing properties. Second, as a functional coating, a protective layer or base layer is formed on the film surface by applying a specific formulation of adhesive or resin to enhance abrasion resistance, provide heat-sealing performance, improve ink adhesion, or facilitate subsequent die-cutting, transfer printing, and other processing. Automated adhesive coating equipment is required for the adhesive coating process of PVC printed film.

[0003] Existing coating equipment, when dealing with PVC printing films of different widths, often suffers from poor adaptability to film width due to the fixed or manually adjustable nozzle spacing, making it difficult to achieve flexible and synchronous equal-spacing adjustments. This reduces the applicability of the coating equipment. Furthermore, each nozzle typically adjusts its spray angle independently, lacking a mechanism for multi-nozzle linkage and synchronous equal-spacing adjustments. Consequently, the spray range cannot quickly adapt to the coating requirements of PVC printing films of different widths, thus affecting the working efficiency of the coating equipment. Summary of the Invention

[0004] The purpose of this invention is to provide an automated adhesive coating device for PVC printed film to solve the problems mentioned in the background art.

[0005] The objective of this invention can be achieved through the following technical solutions: An automated PVC printing film coating device includes a base plate, a top frame fixedly connected to the upper side of the base plate, a first concave plate fixedly connected to the upper side of the top frame, an array of T-shaped sliding plates slidably connected to one side of the first concave plate, springs connected in an array between each pair of T-shaped sliding plates, a coating nozzle rotatably connected inside the T-shaped sliding plates via a rotating rod, an L-shaped plate fixedly connected to the lower side of the first concave plate, an array of rotating shafts rotatably connected to the upper side of the L-shaped plate, and an array of double-headed cams rotatably connected to the upper side of the rotating shafts. A first motor is fixedly connected to the lower side of the L-shaped plate. The output shaft of the first motor is fastened to one of the rotating shafts. A fixed plate is provided above the top frame. A first electric push rod is fixedly connected to one side of the fixed plate. A second concave plate is fixedly connected to the output end of the first electric push rod. An array of frame plates is slidably connected to one side of the second concave plate.

[0006] Preferably, the double-headed cam is located between two T-shaped slide plates. A sprocket is fixedly connected to the outer surface of the rotating shaft, and a chain is sleeved on the sprocket. A glue cylinder is fixedly connected to the upper side of the top frame. The glue cylinder and the fixed plate are fastened together. A pump body and a storage cylinder are fixedly connected to the upper side of the first concave plate respectively. The pump body and the storage cylinder are connected by a pipe. The pump body and the glue cylinder are connected by a pipe. The glue spray nozzle and the storage cylinder are connected by a hose. Rollers are rotatably connected to both ends of the double-headed cam.

[0007] Preferably, a pump body two is fixedly connected to the upper side of the glue tube, two vertical pipes are fixedly connected to the upper side of the glue tube, and an insulation box is fixedly connected to the upper side of the vertical pipes. The pump body two and the insulation box are connected by a pipe, and the insulation box and the glue tube are tightly connected.

[0008] Preferably, a second rotating shaft is rotatably connected inside the glue tube, and a stirring blade is arrayed on the outer surface of the second rotating shaft. A second motor is fixedly connected to one side of the glue tube, and the output shaft of the second motor is fastened to the second rotating shaft. One side of the second rotating shaft passes through the glue tube and extends to the other side of the glue tube. A double-headed cam is fixedly connected to one side of the second rotating shaft.

[0009] Preferably, two baffles are slidably connected to the top of the inside of the insulated box. The two baffles are located inside the two vertical tubes. The upper side of the baffles passes through the insulated box and extends to the upper side of the insulated box. An L-shaped frame is fixedly connected to the upper side of the two baffles. The lower side of the L-shaped frame is attached to the double-headed cam. Two springs are fixedly connected between the L-shaped frame and the insulated box.

[0010] Preferably, a first rotating roller and a second rotating roller are symmetrically distributed and rotatably connected between the top frames. A third motor is fixedly connected to one side of the top frame, and the output shaft of the third motor is fastened to the second rotating roller. A square box is fixedly connected to the middle of the upper side of the top frame. An inverted V-shaped slide is fixedly connected inside the square box. Two second boxes are symmetrically arranged on the upper side of the top frame.

[0011] Preferably, a driving device is fixedly connected to the upper side of the top frame. The driving device is equipped with two symmetrically distributed displacement frames. The driving device is used to drive the two displacement frames to move relative to each other or towards each other. A second electric push rod is fixedly connected to the upper side of each of the two displacement frames. A connecting plate is fixedly connected to the output shaft of each of the two second electric push rods. A feeding slant box is fixedly connected to one side of each of the two connecting plates. A V-shaped baffle is fixedly connected to the symmetrical side of each of the two feeding slant boxes. The V-shaped baffle is located above the PVC printing film.

[0012] Preferably, inclined scrapers are fixedly connected to the symmetrical sides of the two V-shaped baffles. A first groove is provided on the upper side of the two inclined scrapers, and a second groove is provided on the symmetrical sides of the two inclined scrapers. The first groove, the second groove and the inside of the feeding inclined box are connected. Two symmetrically arranged first boxes are placed on the upper side of the bottom plate, and the lower part of the feeding inclined box is located above the first box.

[0013] Preferably, a third electric push rod is fixedly connected to the upper side of the top frame, and a fixed frame is fixedly connected to the output end of the third electric push rod. Two sets of slide rods are slidably connected to the upper side of the fixed frame, and U-shaped plates are fixedly connected to the upper side of both sets of slide rods. Support rollers are rotatably connected inside the two U-shaped plates.

[0014] Preferably, two supporting rollers are symmetrically distributed and attached to the bottom of the PVC printing film. The lower side of the slide rod passes through the fixed frame and extends to the lower side of the fixed frame. Support plates are fixedly connected to the lower side of both sets of slide rods. An array of springs is fixedly connected between the two support plates and the fixed frame. Two vertical rods are symmetrically arranged and fixedly connected to the upper side of the top frame. The fixed frame slides on the vertical rods.

[0015] The beneficial effects of this invention are: 1. This invention utilizes the synchronous rotation of each double-headed cam to compress the displacement of the T-shaped sliding plate, thereby adjusting the spacing of each coating nozzle equally. This allows for flexible adaptation of the spraying range to different widths of PVC printing film, enhancing the equipment's applicability. The flat and protruding parts of the cams correspond to the minimum and maximum spacing, respectively, ensuring the nozzles hang naturally and guaranteeing processing quality. Simultaneously, the first electric push rod moves the frame plate, flexibly adjusting the nozzle angle to effectively expand the coverage area, improve coating uniformity, and meet different process requirements. This enhances the flexibility and adaptability of the coating device, improving operational efficiency and product consistency.

[0016] 2. This invention uses a third electric push rod to drive the fixed frame to move upward along the vertical rod, causing the two supporting rollers to elastically lift the PVC printing film. Combined with the elastic support of three pairs of sliding rods, this not only tightens and flattens the film surface, preventing wrinkles and deviations and ensuring the accuracy of glue application, but also lifts the two ends of the middle part of the film surface to form an inclined angle, facilitating the scraping and collection of glue. Furthermore, the height of the V-shaped baffle can be independently adjusted by the two second electric push rods to match the inclined angle of the film surface. After spraying, the glue automatically flows along the inclined film surface to both ends, is scraped off by the two inclined scrapers, and excess glue flows into the feeding inclined box through the first and second grooves and collects in the first box, achieving clean recycling and avoiding glue waste and pollution.

[0017] 3. By utilizing the V-shaped baffle and inclined scraper near the second roller, residual glue during conveying can be continuously scraped off. At the same time, the drive device moves the two baffles towards or relative to each other, flexibly adjusting the spacing to adapt to different spraying angles and widths. This effectively intercepts splashed glue, preventing pollution of equipment and the environment. The overall structure integrates functions such as tensioning, angle adjustment, precise scraping, adaptive interception, and recycling, improving the uniformity of glue application and film quality, reducing the frequency of manual cleaning, and enhancing the adaptability and operational stability of the device to different processes.

[0018] 4. This invention achieves on-demand decoupling of stirring and replenishing functions through an electromagnetic clutch. During adhesive application, the clutch engages, and the cam drives the stop lever to periodically open the vertical pipe for replenishment. When coating stops, the clutch disengages, the cam stops rotating, the stop lever seals the vertical pipe, and only the stirring blade continues to run to prevent adhesive sedimentation. The double-headed cam adopts an asymmetrical contour design with steep rise and slow fall. The steep rise section allows the stop lever to quickly pull up and open the vertical pipe, while the slow fall section extends the opening time of the vertical pipe, ensuring that the adhesive falls fully by its own weight. The connection between the vertical pipe and the insulation box is equipped with a sealing seat with embedded fluororubber O-rings, forming a sliding seal with the stop lever to ensure reliable sealing during long-term reciprocating motion. In addition, the reciprocating motion of the stop lever also has a mechanical unblocking effect on the residual solidified adhesive on the inner wall of the vertical pipe, further ensuring the long-term unobstructed flow of the replenishing channel and improving the stability and replenishing accuracy of the equipment during continuous operation. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the structure of the glue cylinder and the storage cylinder of the present invention; Figure 3 This is a schematic diagram of the installation of the second concave plate and the frame plate of the present invention; Figure 4 This is a schematic diagram of the structure of the first concave plate and the T-shaped sliding plate of the present invention; Figure 5 This is the present invention. Figure 4 Enlarged view of point A in the middle; Figure 6 This is a schematic diagram of the structure of the double-headed cam II and the L-shaped frame of the present invention; Figure 7 This is a schematic diagram of the material feeding inclined box and V-shaped baffle of the present invention; Figure 8 This is a schematic diagram of the installation of the driving device and displacement frame of the present invention; Figure 9 This is a schematic diagram of the structure of the V-shaped baffle and the inclined scraper of the present invention; Figure 10 This is a schematic diagram of the square box and V-shaped slide of the present invention; Figure 11 This is a schematic diagram of the installation of the U-shaped plate and the supporting roller of the present invention; Figure 12 This is a schematic diagram of the installation of the double-headed cam and roller of the present invention.

[0021] The attached figures are labeled as follows: 1. Base plate; 2. First concave plate; 3. T-shaped sliding plate; 4. Spring 1; 5. Glue spray nozzle; 6. L-shaped plate; 7. Double-headed cam 1; 8. Fixing plate; 9. First electric push rod; 10. Second concave plate; 11. Frame plate; 12. Glue cylinder; 13. Pump body 1; 14. Storage cylinder; 15. Hose; 16. Pump body 2; 17. Insulation box; 18. Vertical pipe; 19. Rotating shaft 2; 20. Mixing blade; 21. Double-headed cam 2; 22. Stop bar; 23. L-shaped frame; 24. Spring 2; 25. Rotating shaft 1; 26. Top frame; 27. 28. First rotating roller; 29. ​​Second rotating roller; 30. Drive device; 31. Displacement frame; 32. Second electric push rod; 33. Connecting plate; 34. Feeding inclined box; 35. V-shaped baffle; 36. Inclined scraper; 37. First groove; 38. Second groove; 49. First box body; 40. Square box; 41. V-shaped slide; 42. Second box body; 43. Vertical rod; 44. Third electric push rod; 45. Slide rod; 46. U-shaped plate; 47. Support roller; 48. Support plate; 49. Spring; 50. Fixing frame; 61. Roller. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Please see Figure 1-12 As shown, the present invention is an automated adhesive coating device for PVC printing film, including a base plate 1, a top frame 26 fixedly connected to the upper side of the base plate 1, a first concave plate 2 fixedly connected to the upper side of the top frame 26, an array of T-shaped slide plates 3 slidably connected to one side of the first concave plate 2, springs 4 connected in an array between each pair of T-shaped slide plates 3, an adhesive coating nozzle 5 rotatably connected inside the T-shaped slide plate 3 via a rotating rod, an L-shaped plate 6 fixedly connected to the lower side of the first concave plate 2, an array of rotating shafts 25 rotatably connected to the upper side of the L-shaped plate 6, and an array of double-headed cams 7 rotatably connected to the upper side of the rotating shafts 25. A first motor is fixedly connected to the lower side of the L-shaped plate 6. The output shaft of the first motor is fastened to one of the rotating shafts 25. A fixed plate 8 is provided above the top frame 26. A first electric push rod 9 is fixedly connected to one side of the fixed plate 8. A second concave plate 10 is fixedly connected to the output end of the first electric push rod 9. An array of frame plates 11 is slidably connected to one side of the second concave plate 10. After the glue applicator stops, the frame plates 11 are driven to reciprocate rapidly by the output end of the first electric push rod 9, which suddenly changes the tilt angle of the glue applicator nozzle 5, such as swinging from +15° to -15°. The glue inside the nozzle will generate a reverse pulse pressure due to centrifugal inertia. This pulse pressure can effectively "shake off" the semi-cured glue particles attached to the inner wall of the nozzle, achieving a cleaning effect without the need for any additional cleaning mechanism.

[0024] The inner wall of the frame plate 11 is provided with a guide groove, and the glue spray nozzle 5 is embedded in the guide groove of the frame plate 11. The two are in sliding fit. When the first electric push rod 9 drives the frame plate 11 to move horizontally, the guide groove will force the glue spray nozzle 5 to slide along the guide groove. Since the glue spray nozzle 5 is rotatably connected to the T-shaped slide plate 3 through the rotating rod, the glue spray nozzle 5 can adjust the angle. At the same time, the inside of the second concave plate 10 is provided with a dovetail groove mechanism, and the frame plate 11 is slidably placed in the dovetail groove, and the glue spray nozzle 5 is located in the dovetail groove.

[0025] In addition, starting the first motor causes the output shaft of the first motor to drive the rotating shaft 25 to rotate. Then, the rotating shaft 25 drives the double-headed cam 7 to rotate. The rollers 50 at both ends of the double-headed cam 7 can gradually squeeze the two T-shaped slide plates 3, allowing each T-shaped slide plate 3 to move at equal intervals in the first concave plate 2. This allows for equal adjustment of the spacing of all the glue-applying nozzles 5, so that the glue-applying nozzles 5 can be flexibly adjusted to adapt to spraying PVC printing films of different widths, improving the spraying effect. As the glue-applying nozzles 5 move, the corresponding frame plates 11 will also move in the dovetail groove of the second concave plate 10. Subsequently, only one first electric push rod 9 is needed to drive all the frame plates 11 in the dovetail groove of the second concave plate 10 to move back and forth along the direction of the T-shaped slide plates 3. With the help of the guide groove to constrain the glue-applying nozzles 5 laterally, the linear motion of the frame plates 11 is converted into the rotational motion of the glue-applying nozzles 5, which can push or pull the glue-applying nozzles 5 to rotate, thereby adjusting the spraying angle of the glue-applying nozzles 5.

[0026] The double-headed cam 7 is located between two T-shaped slide plates 3. A sprocket is fixedly connected to the outer surface of the rotating shaft 25, and a chain is sleeved on the sprocket. A glue cylinder 12 is fixedly connected to the upper side of the top frame 26. The glue cylinder 12 and the fixing plate 8 are fastened together. A pump body 13 and a storage cylinder 14 are fixedly connected to the upper side of the first concave plate 2. The pump body 13 and the storage cylinder 14 are connected by a pipe. The pump body 13 and the glue cylinder 12 are connected by a pipe. The glue spray nozzle 5 and the storage cylinder 14 are connected by a hose 15. Rollers 50 are rotatably connected to both ends of the double-headed cam 7. The hose 15 is made of flexible Teflon tubing to avoid fatigue breakage of the tubing when swinging.

[0027] Spring 4 is connected between two adjacent T-shaped slide plates 3. All the double-headed cams 7 are located between each pair of T-shaped slide plates 3. When the double-headed cams 7 rotate and squeeze the two T-shaped slide plates 3, the T-shaped slide plates 3 will move. At this time, the spring 4 connected between the adjacent T-shaped slide plates 3 will be stretched or compressed. The elastic force of the spring 4 will act on the adjacent slide plates, so that all the T-shaped slide plates 3 can be evenly redistributed under the combined action of the squeezing of the double-headed cams 7 and the reset of the springs 4, thereby ensuring that the spacing between each glue spray nozzle 5 is always equal. The tension of the spring 4 can also ensure that the side wall of the T-shaped slide plate 3 is always in close contact with the roller 50 of the double-headed cams 7, eliminating gaps and ensuring adjustment accuracy.

[0028] A pump body 16 is fixedly connected to the upper side of the glue cylinder 12. Two vertical pipes 18 are fixedly connected to the upper side of the glue cylinder 12. An insulation box 17 is fixedly connected to the upper side of the vertical pipes 18. The pump body 16 and the insulation box 17 are connected by a pipe. The insulation box 17 is tightly connected to the glue cylinder 12.

[0029] The glue cylinder 12 is rotatably connected to a second rotating shaft 19. The outer surface of the second rotating shaft 19 is connected to an array of stirring blades 20. A second motor is fixedly connected to one side of the glue cylinder 12. The output shaft of the second motor is fastened to the second rotating shaft 19. One side of the second rotating shaft 19 passes through the glue cylinder 12 and extends to the other side of the glue cylinder 12. A double-headed cam 21 is fixedly connected to one side of the second rotating shaft 19.

[0030] Two baffles 22 are slidably connected to the top of the inside of the heat preservation box 17. The two baffles 22 are located inside the two vertical tubes 18. The upper side of the baffles 22 passes through the heat preservation box 17 and extends to the upper side of the heat preservation box 17. An L-shaped frame 23 is fixedly connected to the upper side of the two baffles 22. The lower side of the L-shaped frame 23 is attached to the double-headed cam 21. Two springs 24 are fixedly connected between the L-shaped frame 23 and the heat preservation box 17.

[0031] It can be explained that a ring of heating rods is arrayed within the shell of the insulation box 17. When the heating rods are energized, they heat the adhesive within the insulation box 17. An electromagnetic clutch is added between the rotating shaft 19 and the double-headed cam 21. During adhesive application, the pump 13 operates, the adhesive level in the adhesive cartridge 12 drops, the electromagnetic clutch engages, and the second motor starts, driving the rotating shaft 19 to rotate. The rotation of the rotating shaft 19 causes the double-headed cam 21 on one side to rotate synchronously. The rotation of the double-headed cam 21 periodically presses the L-shaped frame 23 upwards, which, combined with the elastic force of the spring 24, causes the L-shaped frame 23 to... The frame 23 drives the two baffles 22 to slide up and down along the insulation box 17. When the baffles 22 move upward, the two baffles 22 move away from the two vertical pipes 18, and the raw material that is kept at a constant temperature in the insulation box 17 can flow into the glue cylinder 12 through the vertical pipes 18 to complete the automatic replenishment. When the baffles 22 move downward, the two baffles 22 are used to seal the two vertical pipes 18 to realize the periodic quantitative glue feeding. At the same time, during the up and down reciprocating movement of the baffles 22, the solidified raw material remaining in the vertical pipes 18 can also be cleared to prevent the vertical pipes 18 from becoming blocked and to ensure that the replenishment operation is carried out smoothly. When the glue application stops, stirring is performed to prevent sedimentation. The electromagnetic clutch disengages, the double-headed cam 21 stops rotating, and the stop lever 22 remains in the state of sealing the vertical tube 18. This allows the rotating shaft 29 to drive the stirring blade 20 on the rotating shaft 29 to rotate continuously, so as to continuously stir the glue inside the glue cylinder 12, avoid the glue from settling and sedimentation, and ensure the stable bonding performance of the glue after application.

[0032] The double-headed cam 21 has a small convex angle, which pushes the stop lever 22 upward to open the vertical tube 18, allowing the stop lever 22 to be pulled up instantly. The double-headed cam 21 has a large flat angle, and the stop lever 22 falls back to close the vertical tube 18 under the action of the spring 24, giving the glue enough time to flow down by its own weight. The opening time of the vertical tube 18 is also long enough. Moreover, the stop lever 22 is round and will not cause the glue to move upward. At the connection between the top of the insulation box 17 and the vertical tube 18, a sealing seat is set. An annular groove is opened on the inner wall of the sealing seat, and a high-temperature resistant fluororubber O-ring is embedded in the groove. The stop lever 22 passes through the inner hole of the O-ring to form a sliding seal fit.

[0033] In addition, when the pump body 2 16 is started, the pump body 2 16 can draw the glue from the outside into the insulation box 17 through the pipe. Then, when the baffle 22 moves up and down, the insulation box 17 can supply the glue cylinder 12. At the same time, the pump body 2 16 can transport the glue in the glue cylinder 12 through the pipe to the storage cylinder 14, and then spray it out by each glue spray nozzle 5 so that the PVC printing film can complete the glue coating work.

[0034] A first roller 27 and a second roller 28 are symmetrically connected to the top frame 26. A third motor is fixedly connected to one side of the top frame 26, and the output shaft of the third motor is fastened to the second roller 28. A square box 39 is fixedly connected to the middle of the upper side of the top frame 26. An inverted V-shaped slide 40 is fixedly connected inside the square box 39. Two symmetrically arranged second boxes 41 are placed on the upper side of the top frame 26. The PVC printing film on the first roller 27 is wound and fixed to the second roller 28. When the output shaft of the third motor drives the second roller 28 to rotate, the PVC printing film can be uniformly conveyed and wound to the other side. The glue-applying nozzle 5 completes continuous automated glue-applying operations. As the glue flows downwards along the wide edge of the PVC printing film, it falls onto the V-shaped slide 40 of the square box 39 and finally flows into the second box 41 on both sides for centralized recycling, avoiding glue waste and reducing glue dripping and contamination of the equipment, facilitating subsequent cleaning operations. Meanwhile, the first roller 27 and the second roller 28 are both fixedly connected with symmetrically arranged limiting rings by bolts. The limiting rings can be adjusted according to the film width and can limit the conveying direction of the PVC printing film to prevent wrinkles in the PVC printing film.

[0035] A drive device 29 is fixedly connected to the upper side of the top frame 26. Two displacement frames 30 are symmetrically distributed on the drive device 29. The drive device 29 is used to drive the two displacement frames 30 to move relative to each other or towards each other. A second electric push rod 31 is fixedly connected to the upper side of each of the two displacement frames 30. A connecting plate 32 is fixedly connected to the output shaft of each of the two second electric push rods 31. A feeding slant box 33 is fixedly connected to one side of each of the two connecting plates 32. A V-shaped baffle 34 is fixedly connected to the symmetrical side of each of the two feeding slant boxes 33. The V-shaped baffle 34 is located above the PVC printing film.

[0036] Furthermore, the drive device 29 is a bidirectional screw transmission mechanism. The output shaft of the servo motor drives the bidirectional screw to rotate. Two displacement frames 30 are symmetrically arranged and threaded on the bidirectional screw. In this way, the two displacement frames 30 on the bidirectional screw can drive the two sets of feeding inclined boxes 33 and V-shaped baffles 34 to move towards each other or relative to each other. The drive device 29 is prior art and is not limited thereto.

[0037] Two V-shaped baffles 34 are fixedly connected to inclined scrapers 35 on their symmetrical sides. The upper side of each of the two inclined scrapers 35 is provided with a first groove 36, and the symmetrical side of each of the two inclined scrapers 35 is provided with a second groove 37. The first groove 36, the second groove 37 and the inside of the feeding inclined box 33 are connected. Two symmetrically arranged first boxes 38 are placed on the upper side of the bottom plate 1. The lower part of the feeding inclined box 33 is located above the first boxes 38.

[0038] A third electric push rod 43 is fixedly connected to the upper side of the top frame 26. A fixed frame 49 is fixedly connected to the output end of the third electric push rod 43. Two sets of slide rods 44 are slidably connected to the upper side of the fixed frame 49. U-shaped plates 45 are fixedly connected to the upper side of both sets of slide rods 44. Support rollers 46 are rotatably connected inside the two U-shaped plates 45.

[0039] Two supporting rollers 46 are symmetrically distributed and attached to the bottom of the PVC printing film. The lower side of the slide rod 44 passes through the fixed frame 49 and extends to the lower side of the fixed frame 49. The lower side of both sets of slide rods 44 is fixedly connected to the support plate 47. The two support plates 47 and the fixed frame 49 are respectively fixedly connected to an array of springs 48. The upper side of the top frame 26 is fixedly connected to two symmetrically arranged vertical rods 42. The fixed frame 49 slides on the vertical rods 42.

[0040] It can be explained that before the glue application work, after the third electric push rod 43 is started, it will drive the fixed frame 49 to move upward along the vertical rod 42, which in turn will drive the two support rollers 46 above the fixed frame 49 to move upward and lift up, and fit against the lower side of the PVC printing film. With the elastic support of the spring 48 on the slide rod 44, the support rollers 46 can elastically press the PVC printing film, so that the PVC printing film can remain taut and flat during the glue application operation, avoiding wrinkles and displacement of the PVC printing film and ensuring the accuracy of the glue application operation. At the same time, the two ends of the middle part of the PVC printing film are lifted upward and placed at an inclined angle. At this time, the glue can flow downward due to gravity, so that the glue will have a regular lateral displacement before reaching the inclined scraper 35. Excess glue can flow to the second groove 37 of the V-shaped baffle 34 and will not accumulate in one place, thereby improving the uniformity of the glue layer thickness and facilitating the subsequent glue scraping work. The V-shaped baffle 34 is higher than the membrane surface, intercepting the glue mist and splashing droplets that drift from the nozzle area to both sides. The inclined scraper 35 is located at the lower part of the V-shaped baffle 34, adhering to the membrane surface, and scraping off the excess glue.

[0041] When the two second electric push rods 31 are started, the height of the two V-shaped baffles 34 can be adjusted so that the two V-shaped baffles 34 are at the same tilt angle as the PVC printing film. This will prevent the PVC printing film from being scratched or missed. At this time, the V-shaped opening of the V-shaped baffles 34 can also be used to physically smooth and flatten the edge of the PVC film. After the glue is sprayed, the glue flows along the tilted PVC printing film to both ends. After the two tilted scrapers 35 scrape and collect the excess glue on the top of the PVC printing film after the glue is applied, the excess glue flows into the feeding box 33 along the first groove 36 and the second groove 37 of the two tilted scrapers 35. Finally, it falls into the first box 38 below the feeding box 33 for collection. At the same time, since the two supporting rollers 46 support and adhere to the PVC printing film, the tilted scrapers 35 are always consistent with the tilted PVC printing film so as to continuously scrape off the glue. Furthermore, the inclined scraper 35 near the second roller 28 can continuously scrape off the PVC printing film being conveyed. At the same time, the drive device 29 drives the two V-shaped baffles 34 to move towards each other or relative to each other, so as to flexibly adjust the distance between the two V-shaped baffles 34 to adapt to intercepting the glue spray nozzles 5 at different spraying angles and prevent glue from being sprayed to other positions.

[0042] In use, the invention starts the first motor, which drives the rotating shaft 25 to rotate. With the help of the sprocket and chain drive, all the double-headed cams 7 above the rotating shafts 25 can rotate and adjust together. As the double-headed cams 7 rotate, they can squeeze the two T-shaped slide plates 3 equipped with springs 4, causing the adjacent T-shaped slide plates 3 to move inside the first concave plate 2. At this time, the spacing between the glue spray nozzles 5 inside each adjacent first concave plate 2 is kept consistent. This allows the distance between each glue spray nozzle 5 to be adjusted at equal intervals, thereby expanding the spraying range of the glue spray nozzles 5 at equal intervals. This is suitable for applying glue to PVC printed films of different widths, improving the applicability of the glue coating device. When the two flat sections of the double-headed cam 7 are in contact with the adjacent T-shaped slide plates 3, this is the minimum distance between adjacent glue-applying nozzles 5. When the rollers 50 on the other two sides of the double-headed cam 7 press the two T-shaped slide plates 3 together, this is the maximum distance between adjacent glue-applying nozzles 5. This is beneficial to improving the processing quality of the glue-applying device. At this time, the glue-applying nozzles 5 are all in a natural downward state. Then, the first electric push rod 9 is activated. When the output shaft of the first electric push rod 9 retracts, it can drive the frame plate 11 to move to one side. At this time, the frame plate 11 pulls the glue-applying nozzle 5 to rotate and adjust. When the output shaft of the first electric push rod 9 extends, it can drive the frame plate 11 to move to the opposite side. At this time, the frame plate 11 pushes the glue-applying nozzle 5 to rotate and adjust. In this way, the spraying angle of the glue-applying nozzle 5 is adjusted as the frame plate 11 moves, so that the glue-applying nozzle 5 can be at different angles for glue application. This is beneficial to expand the spraying range, improve the glue application uniformity, and meet different glue application processing requirements.

[0043] The above description is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. An automated adhesive coating device for PVC printed film, comprising a base plate (1), characterized in that, The base plate (1) is fixedly connected to the top frame (26), the top frame (26) is fixedly connected to the top plate (2), the first concave plate (2) is slidably connected to one side of the first concave plate (2), the T-shaped slide plates (3) are slidably connected to one side of the first concave plate (2), the springs (4) are connected in an array between each T-shaped slide plate (3), the glue spray nozzle (5) is rotatably connected inside the T-shaped slide plate (3) through a rotating rod, the L-shaped plate (6) is fixedly connected to the bottom side of the first concave plate (2), the rotating shafts (25) are rotatably connected to the top side of the L-shaped plate (6), and the double-headed cams (7) are rotatably connected to the top side of the rotating shafts (25). The L-shaped plate (6) is fixedly connected to the lower side of the first motor, and the output shaft of the first motor is fastened to one of the rotating shafts (25). A fixed plate (8) is provided above the top frame (26). A first electric push rod (9) is fixedly connected to one side of the fixed plate (8). A second concave plate (10) is fixedly connected to the output end of the first electric push rod (9). An array of frame plates (11) is slidably connected to one side of the second concave plate (10).

2. The automated adhesive coating device for PVC printing film according to claim 1, characterized in that, The double-headed cam (7) is located between two T-shaped slide plates (3). A sprocket is fixedly connected to the outer surface of the shaft (25), and a chain is sleeved on the sprocket. A glue cylinder (12) is fixedly connected to the upper side of the top frame (26). The glue cylinder (12) and the fixing plate (8) are tightly connected. A pump body (13) and a storage cylinder (14) are fixedly connected to the upper side of the first concave plate (2). The pump body (13) and the storage cylinder (14) are connected by a pipe. The pump body (13) and the glue cylinder (12) are connected by a pipe. The glue spray nozzle (5) and the storage cylinder (14) are connected by a hose (15). Rollers (50) are rotatably connected to both ends of the double-headed cam (7).

3. The automated adhesive coating device for PVC printing film according to claim 2, characterized in that, Pump body 2 (16) is fixedly connected to the upper side of the glue tube (12), and two vertical pipes (18) are fixedly connected to the upper side of the glue tube (12). Insulation box (17) is fixedly connected to the upper side of the vertical pipes (18). Pump body 2 (16) and insulation box (17) are connected by a pipe. Insulation box (17) and glue tube (12) are tightly connected.

4. The automated adhesive coating device for PVC printing film according to claim 2, characterized in that, The glue cylinder (12) is rotatably connected to a second rotating shaft (19). The outer surface of the second rotating shaft (19) is connected to an array of stirring blades (20). A second motor is fixedly connected to one side of the glue cylinder (12). The output shaft of the second motor is fastened to the second rotating shaft (19). One side of the second rotating shaft (19) passes through the glue cylinder (12) and extends to the other side of the glue cylinder (12). A double-headed cam (21) is fixedly connected to one side of the second rotating shaft (19).

5. The automated adhesive coating device for PVC printing film according to claim 3, characterized in that, The top of the heat preservation box (17) is slidably connected to two baffles (22). The two baffles (22) are located inside the two vertical tubes (18). The upper side of the baffles (22) passes through the heat preservation box (17) and extends to the upper side of the heat preservation box (17). The upper side of the two baffles (22) is fixedly connected to an L-shaped frame (23). The lower side of the L-shaped frame (23) is attached to the double-headed cam (21). Two springs (24) are fixedly connected between the L-shaped frame (23) and the heat preservation box (17).

6. The automated adhesive coating device for PVC printing film according to claim 1, characterized in that, The top frame (26) is rotatably connected to a first rotating roller (27) and a second rotating roller (28). A third motor is fixedly connected to one side of the top frame (26), and the output shaft of the third motor is fastened to the second rotating roller (28). A square box (39) is fixedly connected to the middle of the upper side of the top frame (26). An inverted V-shaped slide (40) is fixedly connected inside the square box (39). Two second boxes (41) are placed on the upper side of the top frame (26).

7. The automated adhesive coating device for PVC printing film according to claim 1, characterized in that, The top frame (26) is fixedly connected to a drive device (29). The drive device (29) is provided with two symmetrically distributed displacement frames (30). The drive device (29) is used to drive the two displacement frames (30) to move relative to each other or towards each other. The upper sides of the two displacement frames (30) are fixedly connected to a second electric push rod (31). The output shafts of the two second electric push rods (31) are fixedly connected to a connecting plate (32). The two connecting plates (32) are fixedly connected to a feeding slant box (33) on one side. The two feeding slant boxes (33) are fixedly connected to a V-shaped baffle (34) on the opposite side. The V-shaped baffle (34) is located above the PVC printing film.

8. The automated adhesive coating device for PVC printing film according to claim 7, characterized in that, Two V-shaped baffles (34) are fixedly connected to inclined scrapers (35) on their symmetrical sides. A first groove (36) is provided on the upper side of each of the two inclined scrapers (35), and a second groove (37) is provided on the symmetrical side of each of the two inclined scrapers (35). The first groove (36), the second groove (37) and the feeding inclined box (33) are connected internally. Two first boxes (38) are placed symmetrically on the upper side of the bottom plate (1), and the feeding inclined box (33) is located above the first box (38).

9. The automated adhesive coating device for PVC printing film according to claim 1, characterized in that, The top frame (26) is fixedly connected to a third electric push rod (43), and the output end of the third electric push rod (43) is fixedly connected to a fixed frame (49). The fixed frame (49) is slidably connected to two sets of slide rods (44), and the upper side of the two sets of slide rods (44) is fixedly connected to a U-shaped plate (45). The two U-shaped plates (45) are rotatably connected to a support roller (46) inside.

10. An automated adhesive coating device for PVC printing film according to claim 9, characterized in that, The two support rollers (46) are symmetrically distributed and attached to the bottom of the PVC printing film. The lower side of the slide rod (44) passes through the fixed frame (49) and extends to the lower side of the fixed frame (49). The lower side of the two sets of slide rods (44) is fixedly connected with support plates (47). The two support plates (47) and the fixed frame (49) are respectively fixedly connected with arrayed springs (48). The upper side of the top frame (26) is fixedly connected with two symmetrically arranged vertical rods (42). The fixed frame (49) slides on the vertical rods (42).

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