Coated carbon aluminum foil coating device suitable for hot melt extrusion coating dry process

Abstract

This utility model relates to the field of carbon-coated aluminum foil processing technology, and in particular to a carbon-coated aluminum foil coating device suitable for hot melt extrusion dry coating process. It includes a coating machine with a cleaning mechanism for cleaning the surface of continuously conveyed aluminum foil. The cleaning mechanism includes: an air blowing assembly, comprising a horizontal plate mounted on the coating machine, with an air knife rotatably mounted at the lower center of the horizontal plate; and a moving assembly, comprising uprights mounted on both sides below the air blowing assembly, with a base plate fixed to the upper end of the uprights. A drive pulley and a driven pulley are rotatably mounted on the left and right sides of the upper end of the base plate, respectively. A belt is installed between the drive pulley and the driven pulley, and a connecting block is fixed to the outer wall of the belt. A cam is rotatably mounted on the upper end of the connecting block. The air knife moves laterally and reciprocally at high frequency, efficiently removing electrostatic dust from the aluminum foil surface through dynamic shearing action. The horizontal angle of the air knife is adjusted to precisely match aluminum foils of different widths, avoiding airflow waste and achieving efficient and energy-saving cleaning.

Description

Technical Field

[0001] This utility model relates to the field of carbon-coated aluminum foil processing technology, specifically to a carbon-coated aluminum foil coating device suitable for hot melt extrusion dry coating process. Background Technology

[0002] In the field of lithium-ion battery manufacturing, carbon-coated aluminum foil is a key current collector material. By uniformly coating a conductive carbon layer on its surface, the rate performance and cycle life of the battery can be significantly improved. The hot melt extrusion coating dry process is an advanced technology for coating preparation. Its core coating device needs to achieve precise coating and molding of carbon paste under high temperature and solvent-free conditions, which puts extremely high requirements on the stability of the coating process, the uniformity of the coating, and the reliability of the equipment.

[0003] According to CN217069463U, a novel carbon-coated aluminum foil coating device is disclosed. This technology discloses a technical solution including "a base, an unwinding roller on one side of the base, a take-up roller on the other side of the base, a top frame fixedly connected to the top center of the base, a slide rail fixedly installed at the top of the inner side of the top frame, a movable frame slidably connected to the slide rail via a slider, racks fixedly connected to the top and bottom of the inner wall of the movable frame, an incomplete gear meshing between two racks, a drive motor on one side of the incomplete gear, a base plate fixedly connected to the bottom of the movable frame, a cleaning mechanism on the bottom side of the base plate near the unwinding roller, a coating mechanism in the middle of the bottom of the base plate, and a hot air blower fixedly installed on the other side of the bottom of the base plate." This device has the technical effects of "cleaning impurities on the surface of the aluminum foil to be processed, and fully coating and drying the aluminum foil, resulting in good processing quality and high efficiency."

[0004] In the pre-coating cleaning process of existing carbon-coated aluminum foil coating equipment, the fixed-installed air knife cannot effectively break the electrostatic field and airflow boundary layer on the aluminum foil surface, resulting in poor removal of tightly attached fine dust and electrostatically adsorbed particles, which directly affects the uniformity and adhesion of the subsequent coating. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a carbon-coated aluminum foil coating device suitable for hot melt extrusion dry coating processes. By using a high-frequency lateral reciprocating air knife, static dust on the aluminum foil surface is efficiently removed through dynamic shearing action. The horizontal angle of the air knife can be adjusted to precisely match aluminum foils of different widths, avoiding airflow waste and achieving high efficiency, energy saving, and cleaning.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a carbon-coated aluminum foil coating device suitable for hot melt extrusion dry coating process, comprising a coating machine, wherein the coating machine is equipped with a cleaning mechanism for cleaning the surface of continuously conveyed aluminum foil, the cleaning mechanism comprising:

[0007] The air blowing assembly includes a horizontal plate mounted on the coating machine, with an air knife rotatably mounted at the lower center of the horizontal plate;

[0008] The movable component includes uprights positioned on both sides below the blowing component. A base plate is fixed to the upper end of the uprights. A drive pulley and a driven pulley are rotatably mounted on the left and right sides of the upper end of the base plate, respectively. A belt is installed between the drive pulley and the driven pulley. A connecting block is fixed to the outer wall of the belt. A cam is rotatably mounted on the upper end of the connecting block. Slider blocks are slidably mounted on both the front and rear sides of the upper end of the base plate. A guide frame is fixed between the upper ends of the two sliders. A guide groove is opened inside the guide frame, and the cam is located inside the guide groove. A motor is installed at the lower end of the base plate to drive the drive pulley to rotate.

[0009] Preferably, the air blowing assembly includes a support arm fixed to the upper end of the air knife, an electric push rod pivotally connected to the upper end of the horizontal plate, and the output end of the electric push rod is pivotally connected to the support arm.

[0010] Preferably, the moving component further includes guide rails fixed to the front and rear sides of the top of the substrate, and the slider is slidably mounted on the guide rails.

[0011] Preferably, the movable component further includes a reinforcing rib fixed between the stand and the common vertical plane of the substrate.

[0012] Preferably, the guide groove is a straight channel, and the profile of the cam contacts the side walls of the guide groove and drives its movement in a straight line.

[0013] Preferably, the nozzle of the air knife has a slit-type structure.

[0014] Beneficial effects

[0015] This invention provides a carbon-coated aluminum foil coating apparatus suitable for hot melt extrusion dry coating processes. Compared with existing technologies, it has the following advantages:

[0016] 1. The motor output drives the active pulley to rotate, which in turn drives the driven pulley to move the belt. The belt drives the cam to move synchronously through the connecting block. The cam is embedded in the linear guide groove of the guide frame, and its rotational motion is converted into a periodic thrust on the groove wall. This forces the entire guide frame to move back and forth stably along a predetermined trajectory by relying on the sliding pair formed by the slider and the guide rail. The small-amplitude, high-frequency reciprocating movement of the air knife can form a dynamic, overlapping shearing and blowing effect on the aluminum foil surface. This micro-motion breaks the relative balance between the high-speed airflow and the electrostatic field and boundary layer of the aluminum foil surface, and can more effectively remove those fine dust and electrostatically adsorbed particles that are difficult to remove by simple vertical blowing.

[0017] 2. The telescopic movement of the electric push rod drives the support arm through its output end, which in turn drives the air knife to rotate along its vertical axis centered on the rotation connection point with the horizontal plate. This allows for precise electric adjustment of the length direction of the slit air knife, enabling it to quickly rotate to a state perpendicular to the aluminum foil conveying direction during operation to achieve full-width cleaning. This ensures that the effective cleaning length of the air knife is always fully aligned with the actual width of the aluminum foil passing below, avoiding airflow waste at both ends and poor cleaning of edge areas caused by mismatch between the air knife and the aluminum foil direction. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 This is a schematic diagram of the cleaning mechanism in this utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the mobile component in this utility model;

[0021] Figure 4 This is a schematic diagram of the internal structure of the moving component in this utility model.

[0022] In the diagram: 1. Coating machine; 2. Cleaning mechanism; 21. Air blowing assembly; 211. Horizontal plate; 212. Air knife; 213. Support arm; 214. Electric push rod; 22. Moving assembly; 221. Stand; 222. Base plate; 223. Driving pulley; 224. Driven pulley; 225. Belt; 226. Connecting block; 227. Cam; 228. Slider; 229. Guide frame; 2210. Guide groove; 2211. Motor; 2212. Guide rail; 2213. Reinforcing rib. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1 - Figure 4 This utility model provides a technical solution: a carbon-coated aluminum foil coating device suitable for hot melt extrusion coating dry process, including a coating machine 1, a cleaning mechanism 2 on the coating machine 1 for cleaning the surface of continuously conveyed aluminum foil, the cleaning mechanism 2 including:

[0025] The air blowing assembly 21 includes a horizontal plate 211 mounted on the coating machine 1, and an air knife 212 is rotatably mounted at the lower middle of the horizontal plate 211.

[0026] The moving component 22 includes a stand 221 disposed on both sides below the blowing component 21. A base plate 222 is fixed to the upper end of the stand 221. A drive pulley 223 and a driven pulley 224 are rotatably mounted on the left and right sides of the upper end of the base plate 222, respectively. A belt 225 is installed between the drive pulley 223 and the driven pulley 224. A connecting block 226 is fixed to the outer wall of the belt 225. A cam 227 is rotatably mounted on the upper end of the connecting block 226. Slider blocks 228 are slidably mounted on both the front and rear sides of the upper end of the base plate 222. A guide frame 229 is fixed between the upper ends of the two sliders 228. A guide groove 2210 is opened inside the guide frame 229, and the cam 227 is located inside the guide groove 2210. A motor 2211 is installed at the lower end of the base plate 222 and is used to drive the drive pulley 223 to rotate.

[0027] In this embodiment, the output end of the motor 2211 drives the active pulley 223 to rotate. The active pulley 223, in conjunction with the driven pulley 224, drives the belt 225 to move. The belt 225 drives the cam 227 to perform synchronous cyclic motion through the connecting block 226. The cam 227 is embedded in the linear guide groove 2210 of the guide frame 229, and its rotational motion is converted into a periodic thrust on the groove wall. This forces the entire guide frame 229 to move back and forth stably along a predetermined trajectory, relying on the sliding pair formed by the slider 228 and the guide rail 2212. The air knife 212 performs small-amplitude, high-frequency reciprocating movement, which can form a dynamic, overlapping shearing and blowing effect on the aluminum foil surface. This micro-motion breaks the relative balance between the high-speed airflow and the electrostatic field and boundary layer of the aluminum foil surface, and can more effectively peel off those fine dust and electrostatically adsorbed particles that are difficult to remove by simple vertical blowing.

[0028] Specifically, the air blowing assembly 21 includes a support arm 213 fixed to the upper end of the air knife 212, and an electric push rod 214 pivotally connected to the upper end of the horizontal plate 211, with the output end of the electric push rod 214 pivotally connected to the support arm 213.

[0029] In this embodiment, the telescopic movement of the electric push rod 214 drives the support arm 213 through its output end, thereby causing the air knife 212 to rotate around its vertical axis centered on the rotation connection point with the horizontal plate 211. This allows the length direction of the slit-type air knife 212 to be precisely electrically adjusted, enabling it to quickly rotate to a state perpendicular to the aluminum foil conveying direction during operation to achieve full-width cleaning. This ensures that the effective cleaning length of the air knife 212 is always fully aligned with the actual width direction of the aluminum foil passing below, avoiding the problem of wasted airflow at both ends and poor cleaning of the edge area caused by the mismatch between the air knife and the aluminum foil direction.

[0030] Specifically, the moving component 22 also includes guide rails 2212 fixed on the front and rear sides of the top of the substrate 222, and the slider 228 is slidably mounted on the guide rails 2212.

[0031] In this embodiment, the precision guide rails 2212 fixed on the front and rear sides of the top of the substrate 222 and the slider 228 installed at the bottom of the guide frame 229 together form a high-rigidity sliding pair, which strictly constrains the reciprocating motion of the guide frame 229 and the entire air blowing assembly 21 connected above it to an ideal straight line parallel to the width direction of the aluminum foil. This completely eliminates the risk of shaking, swaying or jamming during the movement, and ensures that the distance and relative posture between the nozzle and the surface of the aluminum foil remain constant when the air knife 212 moves left and right. This makes the force distribution of the blowing air curtain extremely uniform, effectively avoiding uneven cleaning force or periodic stripe defects caused by unstable movement trajectory, and greatly improving the stability and reliability of the cleaning effect.

[0032] Specifically, the movable component 22 also includes a reinforcing rib 2213 fixed between the common vertical plane of the support frame 221 and the base plate 222.

[0033] In this embodiment, the reinforcing rib 2213 connecting the common vertical plane of the support frame 221 and the base plate 222 significantly enhances the overall rigidity and bending and torsional resistance of the top support structure of the support frame 221.

[0034] Specifically, the guide groove 2210 is a straight channel, and the profile of the cam 227 contacts the two side walls of the guide groove 2210 and drives its movement in a straight line.

[0035] Specifically, the nozzle of the air knife 212 has a slit-type structure.

[0036] The working principle and usage process of this utility model are as follows: First, the telescopic movement of the electric push rod 214 drives the support arm 213 through its output end, which in turn drives the air knife 212 to rotate around its vertical axis centered on the rotation connection point with the horizontal plate 211. This allows the length direction of the slit air knife 212 to be precisely electrically adjusted, so that it can quickly rotate to a state perpendicular to the aluminum foil conveying direction during operation to achieve full-width cleaning. This ensures that the effective cleaning length of the air knife 212 is always fully aligned with the actual width direction of the aluminum foil passing below, avoiding the problem of wasted airflow at both ends and poor cleaning of the edge area caused by the mismatch between the air knife and the aluminum foil direction.

[0037] The output of motor 2211 drives the active pulley 223 to rotate. The active pulley 223, in conjunction with the driven pulley 224, drives the belt 225 to move. The belt 225 drives the cam 227 to move synchronously through the connecting block 226. The cam 227 is embedded in the linear guide groove 2210 of the guide frame 229, and its rotational motion is converted into a periodic thrust on the groove wall. This forces the entire guide frame 229 to move back and forth stably along a predetermined trajectory, relying on the sliding pair formed by the slider 228 and the guide rail 2212. The air knife 212 performs small-amplitude, high-frequency reciprocating movement, which can form a dynamic, overlapping shearing and blowing effect on the aluminum foil surface. This micro-motion breaks the relative balance between the high-speed airflow and the electrostatic field and boundary layer of the aluminum foil surface, and can more effectively peel off those fine dust and electrostatically adsorbed particles that are difficult to remove by simple vertical blowing.

[0038] 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.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A carbon-coated aluminum foil coating apparatus suitable for hot melt extrusion dry coating process, comprising a coating machine (1), characterized in that: The coating machine (1) is equipped with a cleaning mechanism (2) for cleaning the surface of the continuously conveyed aluminum foil. The cleaning mechanism (2) includes: The air blowing assembly (21) includes a horizontal plate (211) mounted on the coating machine (1), and an air knife (212) is rotatably mounted at the lower middle of the horizontal plate (211); The moving component (22) includes a stand (221) disposed on both sides below the blowing component (21). A base plate (222) is fixed to the upper end of the stand (221). A driving pulley (223) and a driven pulley (224) are rotatably mounted on the left and right sides of the upper end of the base plate (222). A belt (225) is installed between the driving pulley (223) and the driven pulley (224). A connecting block (226) is fixed to the outer wall of the belt (225). 6) A cam (227) is rotatably mounted on the upper end. Sliders (228) are slidably mounted on both the front and rear sides of the upper end of the base plate (222). A guide frame (229) is fixed between the upper ends of the two sliders (228). A guide groove (2210) is opened inside the guide frame (229), and the cam (227) is located inside the guide groove (2210). A motor (2211) is mounted on the lower end of the base plate (222) and is used to drive the drive pulley (223) to rotate.

2. The coated carbon-aluminum foil coating apparatus suitable for hot melt extrusion coating dry process according to claim 1, characterized in that: The air blowing assembly (21) includes a support arm (213) fixed to the upper end of the air knife (212), and an electric push rod (214) is pivotally connected to the upper end of the horizontal plate (211), and the output end of the electric push rod (214) is pivotally connected to the support arm (213).

3. The coated carbon aluminum foil coating apparatus suitable for hot melt extrusion coating dry process according to claim 1, characterized in that: The moving component (22) also includes guide rails (2212) fixed on the front and rear sides of the top of the substrate (222), and the slider (228) is slidably mounted on the guide rails (2212).

4. The coated carbon aluminum foil coating apparatus suitable for hot melt extrusion coating dry process according to claim 1, characterized in that: The moving component (22) also includes a reinforcing rib (2213) fixed between the common vertical plane of the support frame (221) and the base plate (222).

5. The coated carbon aluminum foil coating apparatus suitable for hot melt extrusion coating dry process according to claim 1, characterized in that: The guide groove (2210) is a straight channel, and the profile of the cam (227) contacts the two side walls of the guide groove (2210) and drives its movement in a straight line.

6. The coated carbon aluminum foil coating apparatus suitable for hot melt extrusion coating dry process according to claim 1, characterized in that: The nozzle of the air knife (212) is a slit structure.

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