A coating device for electrothermal film processing

Abstract

The utility model provides a kind of coating device for electrothermal film processing belongs to electrothermal film production technical field.The device includes storage tank, trough, impregnation roller, coating roller, plugging plate and stirring shaft.Discharge port is equipped on the bottom wall of storage tank;Trough is equipped below storage tank;Impregnation roller is rotatably arranged at one side of trough, and part of roller body is immersed in trough;Coating roller is rotatably arranged at one side of impregnation roller, and is tangent contact with the surface of impregnation roller;Plugging plate is configured as lifting slidingly arranged in storage tank, and discharge passage is provided between plugging plate and inner bottom wall of storage tank;Stirring shaft is rotatably arranged in storage tank.The utility model specifically provides a kind of coating device for electrothermal film processing, which can control the flow of material added to the trough, and can stir the paint in the storage tank.

Description

Technical Field

[0001] This utility model belongs to the field of electrothermal film production technology, specifically referring to a coating device for electrothermal film processing. Background Technology

[0002] Electric heating films, as a highly efficient and energy-saving heating element, are widely used in building heating, home appliance heating, and other fields. Their core structure typically includes a base layer, a conductive heating layer, an electrode layer, and a protective layer. The uniform coating of the conductive heating layer is a key process determining the heating performance and lifespan of the electric heating film. The main purpose of the coating process is to uniformly apply specific functional coatings (such as graphene slurry, carbon nanotube conductive coatings, or carbon fiber hybrid coatings) to the surface of the base layer. Subsequent curing and cutting processes form a stable conductive heating path, ensuring that the electric heating film can achieve uniform heating, efficient heat dissipation, and safe operation after being energized.

[0003] Existing coating equipment generally employs a manual, intermittent feeding method. This means that when the coating tank or hopper in the coating unit is low on coating material, the operator manually adds more. Taking the production of mainstream graphene electrothermal films as an example, the graphene conductive slurry used contains nanoscale conductive particles, which not only has high viscosity but also tends to settle and separate after prolonged standing. For carbon-based conductive coatings, their thixotropic characteristics require continuous stirring during the feeding process. These requirements further increase the intensity of manual labor.

[0004] Meanwhile, the flow rate and timing of manual material addition rely entirely on the operator's experience and cannot be precisely controlled based on parameters such as coating thickness and the speed of the electric heating film. Insufficient material addition can easily cause defects such as missed coating and broken strips on the coating surface, while excessive material addition will cause a large amount of paint to accumulate in the material tank, which will accelerate the stratification and sedimentation due to the lack of continuous stirring, further affecting the coating uniformity. Utility Model Content

[0005] In view of the above situation and to overcome the defects of the prior art, the purpose of this utility model is to provide a coating device for electrothermal film processing, so as to at least partially solve the problems mentioned in the background art.

[0006] The technical solution adopted by this utility model is as follows: This utility model proposes a coating device for electrothermal film processing, comprising: The storage bin has a discharge port on its bottom wall; A material trough is located below a storage tank, which is used to add a measured amount of paint to the material trough. The dip roller is rotatably mounted on one side of the trough, with part of the roller body immersed in the trough, and is used to pick up paint from the trough. The coating roller is rotatably mounted on one side of the dip roller and is in tangential contact with the surface of the dip roller. It is used to receive and transfer the coating on the dip roller. The sealing plate is configured to slide and lift within the storage box. A discharge channel is provided between the sealing plate and the inner bottom wall of the storage box. When the sealing plate descends, the discharge channel decreases, the paint discharge flow rate decreases, and when the sealing plate descends to its lowest point, it blocks the discharge port. The stirring shaft is rotatably located inside the storage tank.

[0007] Furthermore, the bottom longitudinal sections of the sealing plate and the storage box are mutually matched inverted T-shaped structures.

[0008] Furthermore, the length of the discharge port is adapted to the width of the trough and the length of the immersion roller. Multiple sets of stirring shafts are provided on the storage box, and the multiple sets of stirring shafts are driven by belts. Stirring blades are provided on the stirring shafts.

[0009] Furthermore, a hollow cavity is provided at the upper part of a portion of the stirring shaft, and a feeding trough is provided at the portion of the stirring shaft located inside the storage box. The feeding trough is connected to the hollow cavity, and a feeding pipe is connected to the stirring shaft with the feeding trough.

[0010] Furthermore, the stirring shafts with the hollow cavity are dispersedly arranged, and the bottom wall of the hollow cavity is a conical structure.

[0011] Furthermore, an installation frame is provided on the outside of the storage box, and a lifting and sliding protective cover is configured on the installation frame. The protective cover is located above the dip roller, and its lower surface is an arc-shaped surface adapted to the outer surface of the dip roller. A scraping gap is formed at the feed end between the protective cover and the dip roller. The protective cover is used to protect the upper part of the dip roller, and the scraping gap size is adjusted by lifting and sliding to control the amount of paint on the dip roller.

[0012] Furthermore, both the storage bin and the mounting frame are equipped with lifting mechanisms. The lifting mechanism on the storage bin is connected to the sealing plate, and the lifting mechanism on the mounting frame is connected to the protective cover.

[0013] Furthermore, the lifting mechanism includes a lifting motor, a nut sleeve, a threaded rod, and a lifting slide rod. A driving gear is fixedly mounted on the output shaft of the lifting motor. The nut sleeve is rotatable and a driven gear is fixedly mounted on it. The driven gear meshes with the driving gear. The threaded rod is connected to the nut sleeve via threads. The lifting slide rod is configured to slide. The sealing plate is connected to the threaded rod and lifting slide rod of one set of lifting mechanisms, and the protective cover is connected to the threaded rod and lifting slide rod of another set of lifting mechanisms.

[0014] Preferably, the lower end of the threaded rod of the lifting mechanism provided on the storage box is connected to a sliding column, which moves up and down inside the storage box.

[0015] Furthermore, a receiving box is provided below the material tank and the dipping roller, which is used to collect the paint that seeps out between the material tank and the dipping roller.

[0016] Furthermore, the storage bin is equipped with a transparent observation window.

[0017] Furthermore, a heater is provided inside the side wall of the storage bin.

[0018] Furthermore, a coating apparatus for electrothermal film processing further includes a rotating electrothermal film input roller group and multiple sets of conveying rollers. The electrothermal film input roller group is located behind the coating roller, one set of the conveying rollers is located below the coating roller, and the remaining multiple sets of the conveying rollers are located in front of the coating roller.

[0019] Furthermore, the electrothermal film input roller group includes two sets of input rollers that are distributed vertically and have parallel axes.

[0020] The technical solution provided by this utility model has the following beneficial effects: (1) The coating in the storage tank is stirred by the stirring shaft in the storage tank to avoid sedimentation, stratification and other phenomena, thus ensuring the quality of the coating. (2) By cooperating with the sliding sealing plate inside the storage box and the discharge port on the bottom wall of the storage box, the flow rate of the coating is controlled so that the amount of coating in the trough is adapted to parameters such as coating thickness and electric heating film operation and conveying speed, so as to avoid too much or too little coating in the trough. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a coating device for electrothermal film processing according to an embodiment of the present invention; Figure 2 A three-dimensional cross-sectional view of a coating apparatus for electrothermal film processing according to an embodiment of this utility model; Figure 3 This is a schematic diagram of the driving structure of the stirring shaft of a coating device for electrothermal film processing according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the lifting mechanism of a coating device for electrothermal film processing according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the internal cross-sectional structure of the stirring shaft inside the storage tank of a coating device for electrothermal film processing according to an embodiment of the present invention. Figure 6 for Figure 5 A magnified view of part A; Figure 7 This is a schematic diagram of the internal cross-sectional structure of the threaded rod and sliding column inside the storage box of a coating device for electrothermal film processing according to an embodiment of the present invention.

[0022] The components are as follows: 1. Storage box; 2. Discharge port; 3. Material trough; 4. Dipping roller; 5. Coating roller; 6. Sealing plate; 7. Discharge channel; 8. Stirring shaft; 9. Belt; 10. Stirring blade; 11. Hollow cavity; 12. Feeding trough; 13. Feeding pipe; 14. Mounting frame; 15. Protective cover; 16. Scraping gap; 17. Lifting motor; 18. Nut sleeve; 19. Threaded rod; 20. Lifting slide bar; 21. Drive gear; 22. Driven gear; 23. Sliding column; 24. Stirring motor; 25. Drive shaft; 26. Receiving box; 27. Discharge pipe; 28. Electric heating film input roller group; 29. ​​Conveying roller.

[0023] The accompanying drawings are provided to further understand the embodiments and form part of the specification. They are used together with the embodiments for explanation and do not constitute a limitation on the embodiments. Detailed Implementation

[0024] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection.

[0025] In the description of the embodiments, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments and 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 embodiments.

[0026] See Figure 1 and Figure 2In this embodiment, the present invention provides a coating device for electrothermal film processing, including a storage tank 1, a material tank 3, an immersion roller 4, a coating roller 5, a sealing plate 6, and a stirring shaft 8; the storage tank 1 has a discharge port 2 on its bottom wall; the material tank 3 is located below the storage tank 1, and the storage tank 1 is used to quantitatively add coating material into the material tank 3; the immersion roller 4 is rotatably disposed on one side of the material tank 3, and part of the roller body is immersed in the material tank 3, for picking up coating material from the material tank 3; the coating roller 5 is rotatably disposed on one side of the immersion roller 4, and is in tangential contact with the surface of the immersion roller 4, for receiving and transferring the coating material on the immersion roller 4, and finally coating the coating material onto the substrate. Surface; The sealing plate 6 is configured to slide and lift within the storage tank 1. A discharge channel 7 is provided between the sealing plate 6 and the inner bottom wall of the storage tank 1. When the sealing plate 6 descends, the discharge channel 7 shrinks, reducing the paint discharge flow rate. When the sealing plate 6 descends to its lowest point, it seals the discharge port 2. The size of the discharge channel 7 is adjusted by the lifting and lowering of the sealing plate 6 to adapt to the coating thickness and the conveying speed of the electric heating film, avoiding excessive or insufficient paint in the trough 3. The stirring shaft 8 is rotatably located within the storage tank 1. The stirring shaft 8 is used to stir the paint in the storage tank 1, preventing the paint from settling or separating.

[0027] It should be noted that the cooperative arrangement of the dipping roller 4 and the material tank 3 in this embodiment, as well as the implementation method of the dipping roller 4 picking up coating from the material tank 3 by rotating, are existing technologies.

[0028] Initially, the sealing plate 6 is at its lowest position, blocking the outlet 2. When coating the electrothermal film is required, the coating material is drawn into the storage tank 1. The stirring shaft 8 is started to stir the coating material in the storage tank 1 to prevent sedimentation and stratification. After the electrothermal film is fully inserted, the height of the sealing plate 6 in the storage tank 1 is adjusted to regulate the size of the outlet channel 7. The coating material in the storage tank 1 enters the material tank 3 below at a set flow rate. The rotating dipping roller 4 picks up the coating material from the material tank 3, and it is transferred by the coating roller 5 and evenly coated onto the electrothermal film.

[0029] Specifically, see Figure 2 , Figure 5 and Figure 7 In this embodiment, the bottom longitudinal sections of the sealing plate 6 and the storage box 1 are mutually matched inverted T-shaped structures. By setting the inverted T-shaped structure, the size of the discharge channel 7 can be adjusted during the process of the sealing plate 6 rising and falling in the storage box 1.

[0030] Specifically, see Figure 4 , Figure 5 and Figure 7In this embodiment, the length of the discharge port 2 is adapted to the width of the trough 3 and the length of the immersion roller 4. Multiple sets of stirring shafts 8 are provided on the storage box 1. The multiple sets of stirring shafts 8 are driven by belts 9. Stirring blades 10 are provided on the stirring shafts 8. The multiple sets of stirring shafts 8 are evenly distributed along the length direction of the storage box 1 to complete the full coverage stirring inside the storage box 1.

[0031] Specifically, see Figures 2-6 In this embodiment, a hollow cavity 11 is provided on the upper part of a portion of the stirring shaft 8, and a feeding trough 12 is provided on the portion of the stirring shaft 8 located inside the storage box 1. The feeding trough 12 is connected to the hollow cavity 11, and the stirring shaft 8 with the feeding trough 12 is connected to a feeding pipe 13.

[0032] Specifically, see Figures 4-6 In this embodiment, the stirring shaft 8 with hollow cavity 11 is dispersed to realize the dispersion of coating in storage tank 1. The bottom wall of hollow cavity 11 is set with a conical structure. Through the conical structure, all the coating in hollow cavity 11 can enter storage tank 1 through feeding groove 12.

[0033] In practical use, the coating enters the hollow cavity 11 through the feeding pipe 13 and enters the storage box 1 through the feeding trough 12.

[0034] Specifically, see Figure 2 , Figure 5 and Figure 7 In this embodiment, a mounting frame 14 is provided on the outside of the storage box 1. A lifting and sliding protective cover 15 is provided on the mounting frame 14. The protective cover 15 is located above the dip roller 4, and its lower surface is an arc-shaped surface adapted to the outer surface of the dip roller 4. A scraping gap 16 is formed between the feed end of the protective cover 15 and the dip roller 4. The protective cover 15 is used to protect the upper part of the dip roller 4, and the size of the scraping gap 16 is adjusted by lifting and sliding to control the amount of paint on the dip roller 4.

[0035] In practical use, as the dipping roller 4 picks up the paint from the material tank 3 and rotates, the protective cover 15 scrapes off excess paint from the surface of the dipping roller 4 to control the amount of paint on the surface of the dipping roller 4. When the protective cover 15 descends, the scraping gap 16 decreases, and less paint is picked up and transferred from the surface of the dipping roller 4; while when the protective cover 15 rises, the scraping gap 16 increases, and more paint is picked up and transferred from the surface of the dipping roller 4.

[0036] Specifically, see Figures 2-4 and Figure 7In this embodiment, both the storage box 1 and the mounting frame 14 are equipped with lifting mechanisms. The lifting mechanism on the storage box 1 is connected to the sealing plate 6, and the lifting mechanism on the mounting frame 14 is connected to the protective cover 15. Through the setting of the lifting mechanisms, the height adjustment of the sealing plate 6 and the protective cover 15 can be realized respectively.

[0037] Specifically, see Figure 3 , Figure 4 and Figure 7 In this embodiment, the lifting mechanism includes a lifting motor 17, a nut sleeve 18, a threaded rod 19, and a lifting slide rod 20. A drive gear 21 is fixedly mounted on the output shaft of the lifting motor 17. The nut sleeve 18 is rotatable and a driven gear 22 is fixedly mounted on the nut sleeve 18. The driven gear 22 meshes with the drive gear 21. The threaded rod 19 is connected to the nut sleeve 18 by threads. The lifting slide rod 20 is configured to slide. The sealing plate 6 is connected to the threaded rod 19 and the lifting slide rod 20 of one set of lifting mechanisms. The protective cover 15 is connected to the threaded rod 19 and the lifting slide rod 20 of another set of lifting mechanisms.

[0038] It is understood that in this embodiment, the nut cylinder 18 of one lifting mechanism is rotatably mounted on the top wall of the storage box 1, and the lifting slide rod 20 is slidably mounted on the top wall of the storage box 1. The nut cylinder 18 of another lifting mechanism is rotatably mounted on the mounting frame 14, and the lifting slide rod 20 is slidably mounted on the mounting frame 14.

[0039] Preferably, the lower end of the threaded rod 19 of the lifting mechanism provided on the storage box 1 is connected to a sliding column 23. The sliding column 23 moves up and down in the storage box 1. The smooth sliding column 23 replaces the threaded rod 19 with a threaded structure on its surface to move up and down in the storage box 1, avoiding the coating from being wrapped on the surface of the threaded rod 19 and affecting the cooperation between the threaded rod 19 and the nut sleeve 18 to achieve the lifting action.

[0040] In practical use, the lifting motor 17 is started, which drives the drive gear 21 to rotate. Through the meshing of the drive gear 21 and the driven gear 22, the nut cylinder 18 is driven to rotate. Under the guidance of the lifting slide rod 20 and the drive of the lifting screw, the connected sealing plate 6 or protective cover 15 can be driven to rise and fall.

[0041] Specifically, see Figure 3 and Figure 4In this specific embodiment, a stirring motor 24 is provided on the top wall of the storage tank 1, and a drive shaft 25 is rotatably mounted on the top wall of the storage tank 1. The drive shaft 25 is located on one side of the nut sleeve 18 and the lifting slide rod 20, respectively, and the drive shaft 25 and the stirring shaft 8 are driven by a belt 9. In this embodiment, since the stirring shaft 8, the nut sleeve 18 and the lifting slide rod 20 are all located on the center line of the storage tank 1, the drive shaft 25 is used to adjust the transmission route of the belt 9 between the stirring shafts 8, ensuring the transmission of the belt 9 between multiple sets of stirring shafts 8.

[0042] Specifically, see Figure 2 , Figure 5 and Figure 7 In this embodiment, a receiving box 26 is provided below the material tank 3 and the dipping roller 4. The receiving box 26 is used to collect the paint that seeps out between the material tank 3 and the dipping roller 4.

[0043] It should be noted that a discharge pipe 27 is provided on the bottom wall of the receiving bin 26, and a discharge pump is connected to the external discharge pipe 27. The discharge pump can periodically pump out the paint recovered in the receiving bin 26.

[0044] Specifically, in this embodiment, the storage tank 1 is provided with a transparent observation window, which facilitates observation of the amount of paint inside the storage tank 1. A heater is installed inside the side wall of the storage tank 1, which better ensures the performance of the paint inside the storage tank 1. Both the observation window and the heater are existing technologies and are therefore not shown in this embodiment.

[0045] Specifically, see Figure 1 and Figure 2 In this embodiment, a coating apparatus for electrothermal film processing further includes a rotatably arranged electrothermal film input roller group 28 and multiple sets of conveying rollers 29. The electrothermal film input roller group 28 is located behind the coating roller 5, one set of conveying rollers 29 is located below the coating roller 5, and the remaining multiple sets of conveying rollers 29 are located in front of the coating roller 5. The electrothermal film input roller group 28 includes two sets of input rollers that are vertically distributed and have parallel axes.

[0046] It is important to know that the direction in which the electric heating film is introduced is referred to as the rear, and the direction in which it is exited is referred to as the front. The electric heating film is input through the electric heating film input roller group 28, passes between the coating roller 5 and a set of conveying rollers 29 to complete the coating, and is then conveyed to the drying mechanism for drying via multiple sets of conveying rollers 29.

[0047] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0048] The embodiments have been described above, and such description is not restrictive. The figures shown are only one embodiment, and the actual structure is not limited to this. In short, if a person skilled in the art is inspired by this description and designs a similar structure and embodiment without departing from the inventive spirit, such design should fall within the scope of protection.

Claims

1. A coating apparatus for electrothermal film processing, characterized in that, include: The storage bin (1) has a discharge port (2) on its bottom wall; The material tank (3) is located below the storage box (1), and the storage box (1) is used to add paint quantitatively into the material tank (3); The dip roller (4) is rotatably positioned on one side of the trough (3), with part of the roller body immersed in the trough (3) for picking up paint from the trough (3); The coating roller (5) is rotatably mounted on one side of the dip roller (4) and is in tangential contact with the surface of the dip roller (4) to receive and transfer the coating on the dip roller (4); The sealing plate (6) is configured to slide and lift within the storage box (1). A discharge channel (7) is provided between the sealing plate (6) and the inner bottom wall of the storage box (1). When the sealing plate (6) descends, the discharge channel (7) decreases, the paint discharge flow rate decreases, and when the sealing plate (6) descends to the lowest point, it blocks the discharge port (2). The stirring shaft (8) is rotatably located inside the storage tank (1).

2. The coating apparatus for electrothermal film processing according to claim 1, characterized in that: The bottom longitudinal sections of the sealing plate (6) and the storage box (1) are mutually matched inverted T-shaped structures.

3. The coating apparatus for electrothermal film processing according to claim 1, characterized in that: The length of the discharge port (2) is adapted to the width of the trough (3) and the length of the immersion roller (4). Multiple sets of stirring shafts (8) are provided on the storage box (1). Multiple sets of stirring shafts (8) are driven by belts (9). Stirring blades (10) are provided on the stirring shafts (8).

4. The coating apparatus for electrothermal film processing according to claim 3, characterized in that: A hollow cavity (11) is provided on the upper part of the stirring shaft (8), and a feeding trough (12) is provided on the part of the stirring shaft (8) located in the storage box (1). The feeding trough (12) is connected to the hollow cavity (11), and the stirring shaft (8) with the feeding trough (12) is connected to the feeding pipe (13).

5. The coating apparatus for electrothermal film processing according to claim 4, characterized in that: The stirring shafts (8) of the hollow cavity (11) are dispersedly arranged, and the bottom wall of the hollow cavity (11) is set with a conical structure.

6. The coating apparatus for electrothermal film processing according to claim 1, characterized in that: The storage box (1) is provided with a mounting frame (14) on the outside. The mounting frame (14) is equipped with a lifting and sliding protective cover (15). The protective cover (15) is located above the dip roller (4), and its lower surface is an arc-shaped surface adapted to the outer surface of the dip roller (4). The feed end between the protective cover (15) and the dip roller (4) forms a scraping gap (16). The protective cover (15) is used to protect the upper part of the dip roller (4), and the size of the scraping gap (16) is adjusted by lifting and sliding to control the amount of coating on the dip roller (4).

7. The coating apparatus for electrothermal film processing according to claim 6, characterized in that: Both the storage box (1) and the mounting frame (14) are equipped with lifting mechanisms. The lifting mechanism on the storage box (1) is connected to the sealing plate (6), and the lifting mechanism on the mounting frame (14) is connected to the protective cover (15).

8. The coating apparatus for electrothermal film processing according to claim 1, characterized in that: A receiving box (26) is provided below the material trough (3) and the dipping roller (4), and the receiving box (26) is used to collect the paint seeping out between the material trough (3) and the dipping roller (4).

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