Coating device for cotton packaging film production
By designing a discharge control mechanism and a coating protection mechanism in the coating device for cotton packaging film production, the problem of difficult to control the coating thickness of packaging films of different thicknesses is solved, and the coating and coating quality of appropriate thicknesses are improved.
Patent Information
- Application Number
- CN202411646405.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-18
- Publication Date
- 2025-03-21
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
When the existing coating devices for cotton packaging film production process are treated with packaging films of different thicknesses, it is easy to have too much or too little coating, and it is difficult to achieve appropriate thickness control.
A coating device including a discharge control mechanism and a coating protection mechanism is designed. The discharge control mechanism adjusts the discharge amount of the coating liquid through the cooperation of the threaded rod and the discharge cylinder; the coating protection mechanism adjusts the clamping force of the packaging film by adjusting the movement of the screw, upper and lower inclined plates and elastic telescopic parts to ensure that the films of different thicknesses are evenly coated.
Appropriate coating thickness control for packaging films of different thicknesses is achieved, the problem of excessive or too little coating is avoided, and the coating quality and equipment use efficiency are improved.
Smart Images
Figure CN119657402A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of packaging film coating, in particular to a coating device for producing cotton packaging film. Background Art
[0002] The packaging film is mainly extruded from a mixture of several different brands of polyethylene resins. It has puncture resistance and super strength and high performance. It is used to wrap the goods stacked on the pallet to make the packaging more stable and tidy and has super waterproof effect. It is widely used in foreign trade export, papermaking, hardware, plastic chemicals, building materials, food, medicine and other industries, including the cotton packaging industry.
[0003] A coating device for producing cotton packaging film disclosed in patent number CN 218925165 U solves the problems raised in the background technology. The device comprises a bottom plate, two first side plates and two second side plates are respectively fixedly connected to the top of the bottom plate, four coating rollers are rotatably arranged between the two first side plates, the four coating rollers are arranged in a group of two, and the two groups of coating rollers are arranged horizontally.
[0004] The coating device for producing cotton packaging film can utilize the combination of a rotating roller and a coating roller to perform coating processing operations on the cotton packaging film during the coating operation on the cotton packaging film. However, when coating operations of different thicknesses are performed on packaging films of different thicknesses, there may be a situation where the coating is too much or too little, and therefore the technical solution needs to be improved. Summary of the invention
[0005] The object of the present invention is to provide a coating device for producing cotton packaging film to solve the problems raised in the above background technology.
[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a coating device for producing cotton packaging film, comprising a base, a bottom frame is fixedly connected to the middle of the top of the base, a liquid container is fixedly connected to the top of the bottom frame, a discharge control mechanism is fixedly connected to the inside of the liquid container, a coating protection mechanism is fixedly connected to the front and rear sides of the bottom frame, a tension mechanism is fixedly connected to one side of the coating protection mechanism, and a film conveying device is fixedly connected to the left and right ends of the top of the base; The material discharging control mechanism comprises a material discharging component and a positioning component, and the positioning component is arranged on one side of the material discharging component; The coating protection mechanism includes side support plates, which are fixedly connected to the front and rear sides of the base frame, upper inclined plates are fixedly connected inside the left and right ends of the side support plates respectively, a lower inclined plate is arranged at the bottom end of the upper inclined plate, a connecting strip is fixedly connected to the bottom end of the lower inclined plate, a movable long plate is fixedly connected to one end of the front side of the connecting strip, an adjusting screw is threadedly connected to the middle of the movable long plate, an elastic telescopic part is fixedly connected to the bottom end of the connecting strip, a sliding strip is fixedly connected to the bottom end of the elastic telescopic part, and motors are fixedly connected to the middle of the front and rear sides of the base frame respectively, there are two motors, an electric pole is fixedly connected between the two motors, and a soft paint brush cylinder is fixedly connected to the surface of the electric pole; The discharging assembly comprises a bottom circular plate, which is rotatably connected to the bottom end of the liquid container, a round brush is fixedly connected inside the bottom circular plate, a support rod is fixedly connected to the top of the bottom circular plate, a round gear ring is fixedly connected to the top of the support rod, a short rod is fixedly connected to the top of the round gear ring, a threaded plate is fixedly connected to the top of the short rod, a threaded rod is threadedly connected inside the threaded plate, an L-shaped circular plate is rotatably connected to the top of the threaded rod, a liquid discharge cylinder is fixedly connected to the bottom end of the threaded rod, a slider is fixedly connected to the bottom end of one side of the L-shaped circular plate, and a liquid leakage hole is opened on the surface of the liquid discharge cylinder; The clamping assembly comprises a U-shaped long seat, the U-shaped long seat is fixedly connected to the left and right ends of the liquid holding container, a rack is slidably connected to the inside of the U-shaped long seat, one end of the rack is fixedly connected to a pull block, the left end of the liquid holding container is fixedly connected to a clamping seat, the bottom end of the clamping seat is fixedly connected to a first spring, the top of the first spring is fixedly connected to a cross long plate, the front and rear ends of the cross long plate are respectively fixedly connected to positioning strips, a T-shaped rod is arranged in the middle of the cross long plate, the bottom end of the T-shaped rod is fixedly connected to a clamping rod, the side surface of the rack is meshed and connected with the side surface of the circular gear ring, a clamping hole is arranged on the top of the rack, and the surface of the clamping rod is plugged into the inside of the clamping hole; The tension mechanism includes a second spring, which is fixedly connected to one end inside the lower inclined plate. The left end of the second spring is fixedly connected to a limiting rod. The left end of the limiting rod is fixedly connected to an L-shaped frame. A roller is fixedly connected inside the L-shaped frame. The limiting rod has two groups, and a vertical support plate is provided on the surface of the limiting rod at the bottom. The right side of the vertical support plate is fixedly connected to the left end of the connecting strip.
[0007] According to the above technical scheme, slide grooves are respectively opened on the front and rear sides of the liquid holding container, and there are two sliders. The surfaces of the two sliders are respectively slidably connected to the inside of the slide grooves. When the threaded rod is raised or lowered, it drives the L-shaped circular plate to move, and drives the slider to move under the limiting action of the slide grooves respectively opened on the front and rear sides of the liquid holding container. Therefore, when adjusting the discharge amount of the coating liquid, the support stability of the liquid discharge cylinder during movement can be guaranteed, and the uniformity of the coating operation of the coating liquid can be further indirectly guaranteed.
[0008] According to the above technical solution, rectangular through holes are respectively opened inside the left and right ends of the liquid container, and the surface of the U-shaped long seat passes through the inside of the rectangular through holes.
[0009] According to the above technical solution, a through hole is opened in the middle of the cross long plate, and the surface of the T-shaped rod passes through the through hole opened in the middle of the cross long plate. When the T-shaped rod drives the card rod to move, it can use the supporting and limiting effect of the through hole opened in the middle of the cross long plate to facilitate the positioning of the card seat when moving, and make the operation process simpler and faster, thereby indirectly improving practical convenience.
[0010] According to the above technical solution, guide grooves are respectively opened inside the left and right ends of the side support plate, and the surface of the slide bar is slidably connected to the inside of the guide groove. When the clamping force of the packaging film is adjusted, the movement of the lower inclined plate will cause the slide bar to move under the limiting action of the guide groove opened inside the side support plate, and thus play a supporting and stabilizing role in the adjustment of the clamping force of the packaging film.
[0011] According to the above technical solution, a limiting groove is opened inside the left end of the lower inclined plate, and the surface of the limiting rod is slidably connected to the inside of the limiting groove. By utilizing the supporting and limiting effect of the limiting groove opened inside the left end of the lower inclined plate, the roller can clamp the edge of the packaging film to avoid the shaking of the packaging film during transportation, which would cause a decrease in the coating quality of the packaging film.
[0012] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. The coating device for producing cotton packaging film has a discharge control mechanism, and the threaded rod moves up and down inside the threaded plate, thereby driving the liquid discharge cylinder at its bottom end to move up and down, thereby changing the position change of the liquid discharge hole on the liquid discharge cylinder and the inside of the liquid container, thereby realizing the adjustment of the discharge amount of the coating liquid when coating the surface of the packaging film, and then different thickness coating requirements can be performed according to packaging films of different thicknesses. When the T-shaped rod moves, it drives the cross long plate and the positioning bar to move, and allows the positioning bar to disengage from the positioning hole opened on the top of the holder, thereby releasing the limiting and fixing effect between the rack and the round gear ring, and the separation and positioning effect between the positioning bar and the positioning hole can be carried out when adjusting the liquid discharge amount and the limiting and fixing effect, and makes the adjustment and control of the discharge amount of the coating liquid more convenient.
[0013] 2. The coating device for producing cotton packaging film, through the coating protection mechanism, rotates the adjusting screw to drive the adjusting screw to move, thereby driving the upper inclined plate to move up and down, and driving the lower inclined plate to move up and down under the support of the elastic telescopic part, and driving the vertical support plate and the roller to move, thereby slightly adjusting the clamping force of packaging films of different thicknesses with different strengths, thereby protecting the packaging films of different thicknesses after tension adjustment, avoiding the tearing damage that may be caused to thinner packaging films when tension is pulled. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings: Figure 1 It is a three-dimensional diagram of the structure of the present invention; Figure 2 It is a three-dimensional diagram of the discharge control mechanism of the structure of the present invention; Figure 3 This is a three-dimensional diagram of the discharging assembly of the structure of the present invention; Figure 4 This is a three-dimensional exploded view of the structural positioning component of the present invention; Figure 5 It is a three-dimensional split cross-sectional view of the parts of the structural positioning assembly of the present invention; Figure 6 This is a three-dimensional split cross-sectional view of the coating protection mechanism of the present invention; Figure 7 This is a three-dimensional exploded view of the structural tension mechanism of the present invention; Figure 8 It is a three-dimensional cross-sectional view of the structure of the present invention.
[0015] In the figure: 1, base; 2, discharge control mechanism; 21, discharge assembly; 211, bottom circular plate; 212, round brush; 2121, support rod; 213, round gear ring; 2131, short rod; 214, threaded plate; 215, threaded rod; 216, liquid discharge cylinder; 217, L-shaped circular plate; 218, slider; 22, clamping assembly; 221, U-shaped long seat; 222, rack; 223, pull block; 224, clamping seat; 225, first spring; 226, cross long plate; 227, positioning strip; 228, T-shaped rod; 229, clamping rod; 3, coating protection mechanism; 31, side support plate; 32, upper inclined plate; 33, lower inclined plate; 34, connecting strip; 35, movable long plate; 36, adjusting screw; 37, elastic telescopic part; 38, slide bar; 39, motor; 391, electric pole; 392, soft coating brush cylinder; 4, tension mechanism; 41, second spring; 42, limit rod; 43, L-shaped frame; 44, roller; 45, vertical support plate; 5, bottom frame; 6, membrane conveying equipment; 7, liquid container. DETAILED DESCRIPTION
[0016] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0017] The present invention provides the following technical solutions: Embodiment 1
[0018] Combination Figures 2 to 8 A coating device for producing cotton packaging film comprises a base 1, a bottom frame 5 is fixedly connected to the middle of the top of the base 1, a liquid container 7 is fixedly connected to the top of the bottom frame 5, a discharging control mechanism 2 is fixedly connected to the liquid container 7, a coating protection mechanism 3 is fixedly connected to the front and rear sides of the bottom frame 5, a tension mechanism 4 is fixedly connected to one side of the coating protection mechanism 3, and a film conveying device 6 is fixedly connected to the left and right ends of the top of the base 1; The material discharging control mechanism 2 includes a material discharging component 21 and a positioning component 22, wherein the positioning component 22 is arranged on one side of the material discharging component 21; The coating protection mechanism 3 includes a side support plate 31, which is fixedly connected to the front and rear sides of the base frame 5, and the left and right ends of the side support plate 31 are respectively fixedly connected with an upper inclined plate 32, and the bottom end of the upper inclined plate 32 is provided with a lower inclined plate 33, and the bottom end of the lower inclined plate 33 is fixedly connected with a connecting strip 34, and one end of the front side of the connecting strip 34 is fixedly connected with a movable long plate 35, and the middle of the movable long plate 35 is threadedly connected, and the bottom end of the connecting strip 34 is fixedly connected with an elastic telescopic member 37, and the bottom end of the elastic telescopic member 37 is fixedly connected with a sliding bar 38, and the middle of the front and rear sides of the base frame 5 are respectively fixedly connected with motors 39, and there are two motors 39, and an electric pole 391 is fixedly connected between the two motors 39, and a soft paint brush cylinder 392 is fixedly connected to the surface of the electric pole 391; The discharging assembly 21 includes a bottom circular plate 211, which is rotatably connected to the bottom end of the liquid container 7, a round brush 212 is fixedly connected inside the bottom circular plate 211, a support rod 2121 is fixedly connected to the top of the bottom circular plate 211, a round gear ring 213 is fixedly connected to the top of the support rod 2121, a short rod 2131 is fixedly connected to the top of the round gear ring 213, a threaded plate 214 is fixedly connected to the top of the short rod 2131, a threaded rod 215 is threadedly connected to the inside of the threaded plate 214, an L-shaped circular plate 217 is rotatably connected to the top of the threaded rod 215, a liquid discharge cylinder 216 is fixedly connected to the bottom end of the threaded rod 215, a slider 218 is fixedly connected to the bottom end of one side of the L-shaped circular plate 217, and a liquid leakage hole is opened on the surface of the liquid discharge cylinder 216; The clamping assembly 22 includes a U-shaped long seat 221, which is fixedly connected to the left and right ends of the liquid container 7. A rack 222 is slidably connected inside the U-shaped long seat 221, and a pull block 223 is fixedly connected to one end of the rack 222. A clamping seat 224 is fixedly connected to the left end of the liquid container 7. A first spring 225 is fixedly connected to the bottom end of the clamping seat 224, and a cross long plate 226 is fixedly connected to the top of the first spring 225. Positioning strips 227 are fixedly connected to the front and rear ends of the cross long plate 226 respectively. A T-shaped rod 228 is provided in the middle of the cross long plate 226, and a clamping rod 229 is fixedly connected to the bottom end of the T-shaped rod 228. The side of the rack 222 is meshed and connected with the side of the round gear ring 213. A clamping hole is provided on the top of the rack 222, and the surface of the clamping rod 229 is plugged into the inside of the clamping hole. The tension mechanism 4 includes a second spring 41, which is fixedly connected to one end inside the lower inclined plate 33. The left end of the second spring 41 is fixedly connected to a limiting rod 42. The left end of the limiting rod 42 is fixedly connected to an L-shaped frame 43. The L-shaped frame 43 is fixedly connected to a roller 44. The limiting rod 42 has two groups. A vertical support plate 45 is provided on the surface of the bottom limiting rod 42. The right side of the vertical support plate 45 is fixedly connected to the left end of the connecting strip 34.
[0019] Furthermore, slide grooves are respectively opened on the front and rear sides inside the liquid container 7, and there are two sliders 218. The surfaces of the two sliders 218 are respectively slidably connected with the inside of the slide grooves. When the threaded rod 215 is raised or lowered, it drives the L-shaped circular plate 217 to move, and drives the slider 218 to move under the limiting action of the slide grooves respectively opened on the front and rear sides inside the liquid container 7. Therefore, when adjusting the discharge amount of the coating liquid, the support stability of the liquid discharge cylinder 216 during its movement can be guaranteed, and the uniformity of the coating operation of the coating liquid can be further guaranteed indirectly. Embodiment 2
[0020] See also Figure 1-8 On the basis of the first embodiment, rectangular through holes are respectively opened inside the left and right ends of the liquid container 7, and the surface of the U-shaped long seat 221 passes through the inside of the rectangular through holes.
[0021] Furthermore, a through hole is opened in the middle of the cross long plate 226, and the surface of the T-shaped rod 228 passes through the through hole opened in the middle of the cross long plate 226. When the T-shaped rod 228 drives the clamping rod 229 to move, it can use the supporting and limiting effect of the through hole opened in the middle of the cross long plate 226 to facilitate the positioning of the clamping seat 224 when moving, and make the operation process simpler and faster, thereby indirectly improving practical convenience. Embodiment 3
[0022] See also Figure 1-8On the basis of the first embodiment, guide grooves are further provided inside the left and right ends of the side support plate 31, and the surface of the slide bar 38 is slidably connected with the inside of the guide groove. When the clamping force of the packaging film is adjusted, the movement of the lower inclined plate 33 will cause the slide bar 38 to move under the limiting effect of the inside of the guide groove provided inside the side support plate 31, and thus play a supporting and stabilizing role in adjusting the clamping force of the packaging film.
[0023] Furthermore, a limiting groove is opened inside the left end of the lower inclined plate 33, and the surface of the limiting rod 42 is slidably connected to the inside of the limiting groove. By utilizing the supporting and limiting effect of the limiting groove opened inside the left end of the lower inclined plate 33 by the limiting rod 42, the roller 44 can clamp the edge of the packaging film to avoid the packaging film from shaking during transportation, which would cause a decrease in the coating quality of the packaging film.
[0024] In actual operation, when this device is used, during the coating operation of the cotton packaging film, when coating is required, the roller 44 is made of soft material, and the coating liquid on the top of the liquid container 7 penetrates into the soft coating brush cylinder 392, and the packaging film is transported through the film conveying device 6. In addition, the part of the packaging film that needs to be coated is tightly attached to the surface of the soft coating brush cylinder 392 during the transportation process, and the soft coating brush cylinder 392 is driven to rotate by the motor 39 to coat the surface of the packaging film. When coating, the movement of the packaging film needs to ensure the flatness and tightness of the surface edge tension at all times to avoid wrinkles during coating. At this time, there are two groups of rollers 44, and the packaging film is clamped between the rollers 44, and combined with the action of the second spring 41, the packaging film can be The film is stretched flat from the edge, so that the surface of the packaging film can be evenly coated to avoid wrinkles that cause a small part of the packaging film surface to be unable to be coated. When it is necessary to apply different coating forces to packaging films of different thicknesses, the bonding force between the soft coating brush tube 392 and the packaging film can be adjusted, and the adjusting screw 36 is rotated to drive the adjusting screw 36 to move, thereby driving the upper inclined plate 32 to move up and down, and driving the lower inclined plate 33 to move up and down under the support of the elastic telescopic member 37, and driving the vertical support plate 45 and the roller 44 to move, thereby slightly adjusting the clamping force of packaging films of different thicknesses, thereby applying different coating forces to packaging films of different thicknesses; During coating, when the coating liquid is inside the liquid container 7 and the amount of coating liquid discharged needs to be controlled, the T-shaped rod 228 drives the clamping rod 229 upward to move to the inside of the clamping seat 224, and then the T-shaped rod 228 is rotated to drive the clamping rod 229 to ninety degrees, so that it is clamped inside the clamping seat 224, and when the T-shaped rod 228 moves, it drives the cross long plate 226 and the positioning bar 227 to move, and allows the positioning bar 227 to disengage from the positioning hole opened at the top of the clamping seat 224, thereby releasing the limiting fixing effect between the rack 222 and the circular gear ring 213, and the circular gear ring 213 can be driven to rotate by the round brush 212 to control the amount of coating liquid discharged, and the disengagement and clamping effect between the positioning bar 227 and the clamping hole can In order to perform the movable and limiting fixing functions when adjusting the liquid discharge volume and make the adjustment and control of the coating liquid discharge volume more convenient, a cylindrical hole is opened at the bottom end of the liquid holding container 7, and the coating liquid falls into the soft coating brush cylinder 392 through the liquid discharge hole to soak the soft coating brush cylinder 392. The liquid discharge cylinder 216 is located inside the cylindrical hole. When the round gear ring 213 rotates, it drives the short rod 2131 and the threaded plate 214 to rotate, and drives the threaded rod 215 to move up and down inside the threaded plate 214, thereby driving the liquid discharge cylinder 216 at its bottom to move up and down, thereby changing the position change of the liquid discharge hole on the liquid discharge cylinder 216 and the inside of the liquid holding container 7, thereby realizing the adjustment of the coating liquid discharge volume when coating the surface of the packaging film.
[0025] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.
[0026] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A coating device for producing cotton packaging film, comprising a base (1), characterized in that: A base frame (5) is fixedly connected to the middle of the top of the base (1); a liquid container (7) is fixedly connected to the top of the base frame (5); a discharge control mechanism (2) is fixedly connected to the inside of the liquid container (7); a coating protection mechanism (3) is fixedly connected to the front and rear sides of the base frame (5); a tension mechanism (4) is fixedly connected to one side of the coating protection mechanism (3); and a film conveying device (6) is fixedly connected to the left and right ends of the top of the base (1); The material discharging control mechanism (2) comprises a material discharging component (21) and a positioning component (22), wherein the positioning component (22) is arranged on one side of the material discharging component (21); The coating protection mechanism (3) comprises a side support plate (31), wherein the side support plate (31) is fixedly connected to the front and rear sides of the base frame (5), and upper inclined plates (32) are fixedly connected inside the left and right ends of the side support plate (31), and a lower inclined plate (33) is arranged at the bottom end of the upper inclined plate (32), and a connecting strip (34) is fixedly connected to the bottom end of the lower inclined plate (33), and a movable long plate (35) is fixedly connected to the front end of the connecting strip (34), and an adjusting screw (36) is threadedly connected to the middle of the movable long plate (35), and an elastic telescopic member (37) is fixedly connected to the bottom end of the connecting strip (34), and a sliding bar (38) is fixedly connected to the bottom end of the elastic telescopic member (37), and a motor (39) is fixedly connected to the middle of the front and rear sides of the base frame (5), and there are two motors (39), and an electric pole (391) is fixedly connected between the two motors (39), and a soft paint brush cylinder (392) is fixedly connected to the surface of the electric pole (391); The discharge assembly (21) comprises a bottom circular plate (211), the bottom circular plate (211) being rotatably connected to the bottom end of the liquid container (7), a round brush (212) being fixedly connected inside the bottom circular plate (211), a support rod (2121) being fixedly connected to the top of the bottom circular plate (211), a round gear ring (213) being fixedly connected to the top of the support rod (2121), a short rod (2131) being fixedly connected to the top of the round gear ring (213), a threaded plate (214) being fixedly connected to the top of the short rod (2131), a threaded rod (215) being threadedly connected inside the threaded plate (214), an L-shaped circular plate (217) being rotatably connected to the top of the threaded rod (215), a liquid discharge cylinder (216) being fixedly connected to the bottom end of the threaded rod (215), a slider (218) being fixedly connected to the bottom end of one side of the L-shaped circular plate (217), and a liquid leakage hole being provided on the surface of the liquid discharge cylinder (216); The latching assembly (22) comprises a U-shaped long seat (221), the U-shaped long seat (221) being fixedly connected to the inside of the left and right ends of the liquid container (7), a rack (222) being slidably connected inside the U-shaped long seat (221), one end of the rack (222) being fixedly connected to a pull block (223), a latching seat (224) being fixedly connected to the left end of the liquid container (7), a first spring (225) being fixedly connected to the bottom end of the latching seat (224), and the top of the first spring (225) being fixedly connected to the bottom end of the latching seat (224). The end is fixedly connected with a cross long plate (226), the front and rear ends of the cross long plate (226) are respectively fixedly connected with positioning strips (227), a T-shaped rod (228) is arranged in the middle of the cross long plate (226), the bottom end of the T-shaped rod (228) is fixedly connected with a clamping rod (229), the side of the rack (222) is meshed with the side of the circular gear ring (213), the top of the rack (222) is provided with a clamping hole, and the surface of the clamping rod (229) is plugged into the inside of the clamping hole; The tension mechanism (4) comprises a second spring (41), the second spring (41) being fixedly connected to one end inside the lower inclined plate (33), the left end of the second spring (41) being fixedly connected to a limiting rod (42), the left end of the limiting rod (42) being fixedly connected to an L-shaped frame (43), the L-shaped frame (43) being fixedly connected to a roller (44), the limiting rod (42) having two groups, a vertical support plate (45) being provided on the surface of the limiting rod (42) at the bottom, the right side of the vertical support plate (45) being fixedly connected to the left end of the connecting bar (34).
2. A coating device for producing cotton packaging film according to claim 1, characterized in that: The liquid container (7) is provided with slide grooves on both the front and rear sides thereof, and there are two slide blocks (218). The surfaces of the two slide blocks (218) are respectively slidably connected to the inside of the slide grooves.
3. A coating device for producing cotton packaging film according to claim 2, characterized in that: Rectangular through holes are respectively provided inside the left and right ends of the liquid container (7), and the surface of the U-shaped long seat (221) passes through the inside of the rectangular through holes.
4. A coating device for producing cotton packaging film according to claim 3, characterized in that: A through hole is provided in the middle of the cross long plate (226), and the surface of the T-shaped rod (228) passes through the through hole provided in the middle of the cross long plate (226).
5. A coating device for producing cotton packaging film according to claim 4, characterized in that: The left and right ends of the side support plate (31) are respectively provided with guide grooves, and the surface of the slide bar (38) is slidably connected to the inside of the guide grooves.
6. A coating device for producing cotton packaging film according to claim 5, characterized in that: A limiting groove is provided inside the left end of the lower inclined plate (33), and the surface of the limiting rod (42) is slidably connected to the inside of the limiting groove.