Multi-layer coating equipment and coating method

Abstract

The invention relates to the technical field of coating machines, in particular to multi-layer coating equipment and a coating method. The multi-layer coating equipment comprises a base, an unwinding mechanism, a winding mechanism, a plurality of coating mechanisms and a plurality of drying mechanisms, the unwinding mechanism, the winding mechanism, the coating mechanisms and the drying mechanisms are all mounted on the base, and the coating mechanisms and the drying mechanisms are alternately arranged at intervals; a base band released by the unwinding mechanism penetrates through the coating mechanism and the drying mechanism and then is wound on the winding mechanism, the coating mechanism is used for coating slurry on the base band and rolling a coating pattern on the base band, and the drying mechanism is used for drying the base band coated by the coating mechanism. According to the multi-layer coating equipment, after the base band is subjected to coating treatment through the multiple coating mechanisms, each coating mechanism can roll out the corresponding coating pattern on the base band, the multiple coating patterns can be distributed on the base band at intervals and can also be distributed on the base band in a stacked mode, and therefore the multi-layer coating equipment can be used for manufacturing different types of electrode materials.

Description

Technical Field

[0001] The present invention relates to the technical field of coating machines, and in particular to a multi-layer coating device and a coating method. Background Art

[0002] With the continuous development of new energy technologies, the requirements for battery performance are becoming increasingly stringent. Lithium batteries are a type of battery that uses lithium metal or lithium alloys as the negative electrode material and a non-aqueous electrolyte solution. Coating is one of the most important processes in the manufacture of lithium-ion batteries. Coating involves evenly applying the positive or negative electrode slurry required for lithium-ion battery manufacturing to the substrate. Currently, the positive electrode substrate is aluminum foil, and the negative electrode substrate is copper foil.

[0003] In order to ensure the performance of the battery, it is necessary to conduct experimental verification of the battery, especially the positive and negative electrode materials of the battery. In the existing technology, the verification of positive and negative electrode materials usually involves cutting off one end of the positive and negative electrode materials in the coating equipment, and then verifying the positive and negative electrode materials. However, the coating equipment can usually only handle one type of positive and negative electrode substrate. When multiple positive and negative electrode substrates need to be verified, different positive and negative electrode substrates need to be manually manufactured, or different positive and negative electrode substrates need to be cut off from different coating equipment. Therefore, the existing coating equipment cannot meet the experimental requirements for multiple positive and negative electrode substrates. Summary of the Invention

[0004] The embodiments of the present invention provide a multi-layer coating device and a coating method to solve technical problems in the prior art, such as the inability of coating devices to meet the experimental requirements for a variety of positive and negative electrode substrates.

[0005] A multilayer coating device provided in one embodiment of the present invention includes a base, an unwinding mechanism, a rewinding mechanism, a plurality of coating mechanisms, and a plurality of drying mechanisms; the unwinding mechanism, the rewinding mechanism, the coating mechanism, and the drying mechanism are all mounted on the base, and the coating mechanisms and the drying mechanisms are alternately arranged; The base tape released by the unwinding mechanism passes through the coating mechanism and the drying mechanism and is then wound on the winding mechanism. The coating mechanism is used to coat the slurry on the base tape and roll out a coating pattern on the base tape. The drying mechanism is used to dry the base tape after coating by the coating mechanism. The coating mechanism includes a coating seat, a coating die, a coating drive, an adjusting drive and a coating roller, wherein the coating seat is mounted on the base; the coating roller is rotatably mounted on the coating seat, and the output end of the coating drive is connected to the coating roller; the coating die is slidably mounted on the coating seat and is arranged opposite to the coating roller; the adjusting drive is mounted on the coating seat, and the output end of the adjusting drive is connected to the coating die, and the adjusting drive is used to drive the coating die to move along the axial direction of the coating roller.

[0006] Optionally, the unwinding mechanism includes an unwinding seat, an unwinding support plate, an unwinding drive, an unwinding roller, an unwinding correction drive, and a correction sensor provided with a first sensing groove; the unwinding support plate is slidably mounted on the unwinding seat; the unwinding correction drive is mounted on the unwinding seat and connected to the unwinding support plate, and is used to drive the unwinding support plate to move; the unwinding roller is rotatably mounted on the unwinding support plate and is used to wind the base tape; the output end of the unwinding drive is connected to the unwinding roller; The deviation correction sensor and the unwinding seat are both installed on the base, and the base tape released by the unwinding roller passes through the first sensing groove and then enters the coating mechanism.

[0007] Optionally, the multi-layer coating device further includes an ultrasonic cleaning mechanism, which includes an ultrasonic base, an ultrasonic lifting drive member, an ultrasonic support plate, an ultrasonic cover plate, a plurality of ultrasonic guide rollers, and an ultrasonic cleaning box provided with a cleaning space; The ultrasonic cover plate is mounted on the ultrasonic support plate and is used to open or close the cleaning space; All the ultrasonic guide rollers are installed at intervals on the ultrasonic support plate, and the base tape released by the unwinding mechanism passes through all the ultrasonic guide rollers in sequence and then enters the coating mechanism; The ultrasonic seat is installed on the base, the ultrasonic lifting drive member is installed on the ultrasonic seat, and the output end of the ultrasonic lifting drive member is connected to the ultrasonic cleaning box; The ultrasonic lifting drive member is used to drive the ultrasonic cleaning box to move, so that the ultrasonic guide roller is inserted into the cleaning space and the ultrasonic cover plate covers the cleaning space, or the ultrasonic guide roller is away from the cleaning space and the ultrasonic cover plate opens the cleaning space.

[0008] Optionally, the multi-layer coating device further comprises a tension adjustment mechanism, the tension adjustment mechanism comprising a swing drive assembly, a swing frame, a swing roller, a counterweight roller and a swing shaft; the swing shaft is mounted on the base, and the swing frame is rotatably mounted on the swing shaft; The swing roller and the counterweight roller are both mounted on the swing frame, and the swing roller and the counterweight roller are respectively located on opposite sides of the swing shaft; The output end of the swing drive assembly is connected to the swing frame, and is used to drive the swing frame to rotate around the swing axis; The base tape released by the unwinding mechanism passes around the swing roller and then enters the coating mechanism.

[0009] Optionally, the swing drive assembly includes a linear drive member and a rocker arm, the linear drive member is mounted on the base, the output end of the linear drive member is rotatably connected to the rocker arm, and the rocker arm is rotatably sleeved on the swing shaft and connected to the swing frame; The tension adjustment mechanism also includes a sensor and a transducer arranged opposite to the sensor, the sensor is mounted on the rocker arm, and the sensor is mounted on the base, and the sensor and the transducer are used to detect the swing angles of the rocker arm and the swing frame.

[0010] Optionally, the multi-layer coating device further comprises a splicing mechanism, wherein the splicing mechanism comprises a first splicing roller, a second splicing roller, and a splicing seat mounted on the base; One end of the first splicing roller is rotatably mounted on the splicing seat, and the other end of the first splicing roller is detachably mounted on the splicing seat; the first splicing roller is used to press the base belt onto the splicing seat; One end of the second splicing roller is rotatably mounted on the splicing seat, and the other end of the second splicing roller is detachably mounted on the splicing seat; the second splicing roller is used to press the base belt onto the splicing seat.

[0011] Optionally, the multi-layer coating device further comprises an air drying mechanism; the air drying mechanism comprises a heating element, an air intake pump, an air exhaust pump and a drying box provided with a drying space, and the drying box is mounted on the base; The heating element is installed in the drying space and is used to heat the gas in the drying space; The air intake pump is connected to the inlet of the drying space, and the air exhaust pump is connected to the outlet of the drying space; The base tape released by the unwinding mechanism passes through the drying space and then enters the coating mechanism.

[0012] Optionally, the coating mechanism includes a coating seat, a coating die head, a coating drive member and a coating roller, and the coating seat is installed on the base; The coating roller is rotatably mounted on the coating seat, and the output end of the coating drive is connected to the coating roller; The coating die head is installed on the coating seat and is arranged opposite to the coating roller.

[0013] Optionally, the multi-layer coating device further comprises an air knife, a static elimination mechanism and a corona mechanism; The base tape released by the unwinding mechanism is sequentially blown by the air knife, subjected to static elimination treatment by the static elimination mechanism, and subjected to corona treatment by the corona mechanism before entering the coating mechanism.

[0014] Optionally, the multi-layer coating device further comprises a driving mechanism for powering the base strip between the unwinding mechanism and the winding mechanism.

[0015] Another embodiment of the present application also provides a coating method applied to the multi-layer coating device, comprising: controlling the unwinding mechanism to release the base strip and controlling the winding mechanism to wind the base strip; if receiving the full-lamination coating instruction, controlling the adjusting driving member to drive the coating die to move along the axial direction of the coating roller, so as to sequentially coat a plurality of first coating layers on the base strip by the plurality of coating mechanisms, and controlling the plurality of drying mechanisms to sequentially perform drying treatment on the first coating layers; wherein each of the first coating layers is formed on the base strip by one coating mechanism, and all the first coating layers on the base strip are arranged in full lamination; if receiving the interval coating instruction, controlling the adjusting driving member to drive the coating die to move along the axial direction of the coating roller, so as to sequentially coat a plurality of second coating layers on the base strip by the plurality of coating mechanisms, and controlling the plurality of drying mechanisms to sequentially perform drying treatment on the second coating layers; wherein each of the second coating layers is formed on the base strip by one coating mechanism, and any two of the second coating layers coated on the base strip are arranged in interval; if receiving the partial-lamination coating instruction, controlling the adjusting driving member to drive the coating die to move along the axial direction of the coating roller, so as to sequentially coat a plurality of third coating layers on the base strip by the plurality of coating mechanisms, and controlling the drying mechanism to sequentially perform drying treatment on the third coating layers; wherein each of the third coating layers is formed on the base strip by one coating mechanism, and the adjacent two of the third coating layers on the base strip are arranged in partial lamination.

[0016] In the present application, the coating mechanism can coat slurry on the base strip and roll out the corresponding coating pattern on the base strip, and the drying mechanism can dry the base strip behind the coating mechanism; the coating mechanism and the drying mechanism are both provided in plurality, and the coating mechanism and the drying mechanism are arranged in interval alternately, after the base strip passes through the coating treatment of the plurality of coating mechanisms, each of the coating mechanisms can roll out the corresponding coating pattern on the base strip, and the plurality of coating patterns can be distributed in interval on the base strip or in lamination on the base strip, so that the multi-layer coating device can manufacture different kinds of electrode materials (positive electrode material or negative electrode material) to meet the requirements of experiments for a plurality of electrode materials. In addition, after experimental verification, the multi-layer coating device can also be applied to actual production. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0018] Figure 1 1 is a schematic structural diagram of a multilayer coating device provided by one embodiment of the present invention; Figure 2 1 is a schematic structural diagram of an unwinding mechanism of a multilayer coating device provided by one embodiment of the present invention; Figure 3 1 is a schematic structural diagram of a coating mechanism of a multi-layer coating device provided by one embodiment of the present invention; Figure 4 1 is a schematic structural diagram of an ultrasonic cleaning mechanism of a multi-layer coating device provided by one embodiment of the present invention; Figure 5 1 is a schematic structural diagram of a tension adjustment mechanism of a multi-layer coating device provided by one embodiment of the present invention; Figure 6 1 is a schematic structural diagram of a belt splicing mechanism of a multi-layer coating device provided by one embodiment of the present invention; Figure 7 1 is a schematic structural diagram of an air-drying mechanism of a multi-layer coating device provided by one embodiment of the present invention; Figure 8 Schematic diagram of the structure of the air knife, static elimination mechanism and corona mechanism of the multi-layer coating equipment provided by one embodiment of the present invention; Figure 9 It is a schematic diagram of the base tape when it is in full-layer coating; Figure 10 It is a schematic diagram of the base tape during interval coating; Figure 11 This is a schematic diagram of the base tape during partial lamination coating.

[0019] The reference numerals in the specification are as follows: 10. Base; 1. Unwinding mechanism; 11. Unwinding seat; 12. Unwinding support plate; 13. Unwinding drive; 14. Unwinding roller; 16. Correction sensor; 161. First sensing groove; 2. Rewinding mechanism; 3. Coating mechanism; 31. Coating seat; 32. Coating die head; 33. Coating drive; 34. Coating roller; 35. Adjustment drive; 4. Drying mechanism; 5. Ultrasonic cleaning mechanism; 51. Ultrasonic seat; 52. Ultrasonic lifting drive; 53. Ultrasonic support plate; 54. Ultrasonic cover; 55. Ultrasonic guide roller; 56. Ultrasonic cleaning box; 561. Cleaning space; 6. Tension adjustment Mechanism; 61. Swing drive assembly; 611. Linear drive member; 612. Rocker arm; 62. Swing frame; 63. Swing roller; 64. Counterweight roller; 65. Swing shaft; 66. Sensor; 67. Sensor; 7. Belt splicing mechanism; 71. First belt splicing roller; 72. Second belt splicing roller; 73. Belt splicing seat; 8. Air drying mechanism; 81. Air intake pump; 82. Exhaust pump; 83. Drying box; 101. Air knife; 102. Static elimination mechanism; 103. Corona mechanism; 104. Drive mechanism; 200. Base tape; 201. First coating layer; 202. Second coating layer; 203. Third coating layer. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] It should be noted that the “front” and “rear” mentioned in this application are defined based on the direction of baseband transmission and are not limited to the front and rear directions in physical position.

[0022] like Figure 1 As shown, a multilayer coating device provided by one embodiment of the present invention includes a base 10, an unwinding mechanism 1, a rewinding mechanism 2, a plurality of coating mechanisms 3, and a plurality of drying mechanisms 4; the unwinding mechanism 1, the rewinding mechanism 2, the coating mechanism 3, and the drying mechanism 4 are all mounted on the base 10, and the coating mechanisms 3 and the drying mechanisms 4 are alternately arranged; The base tape 200 released by the unwinding mechanism 1 passes through the coating mechanism 3 and the drying mechanism 4 and is then wound around the rewinding mechanism 2. The coating mechanism 3 is used to coat the slurry on the base tape 200 and roll out a coating pattern on the base tape 200. The drying mechanism 4 is used to dry the base tape 200 coated by the coating mechanism 3. The coating mechanism 3 includes a coating seat 31, a coating die 32, a coating drive 33, an adjusting drive 35 and a coating roller 34. The coating seat 31 is installed on the base 10; the coating roller 34 is rotatably installed on the coating seat 31, and the output end of the coating drive 33 is connected to the coating roller 34; the coating die 32 is slidably installed on the coating seat 31 and is arranged opposite to the coating roller 34; the adjusting drive 35 is installed on the coating seat 31, and the output end of the adjusting drive 35 is connected to the coating die 32. The adjusting drive 35 is used to drive the coating die 32 to move axially along the coating roller 34.

[0023] The number of coating mechanisms 3 and drying mechanisms 4 can be set according to actual needs. For example, four coating mechanisms 3 and four drying mechanisms 4 are provided. A drying mechanism 4 is provided behind each coating mechanism 3. The coating mechanism 3 can be a different type of coating machine, and can coat the base tape 200 using processes such as extrusion coating and roller coating. The unwinding mechanism 1 releases the uncoated base tape 200 at the front end, and the rewinding mechanism 2 collects the coated base tape 200 at the rear end.

[0024] The coating drive 33 includes, but is not limited to, a rotary motor, a rotary cylinder, etc., and the adjustment drive 35 includes, but is not limited to, a pneumatic cylinder, a hydraulic cylinder, etc. Preferably, the coating roller 34 is provided with a rolling pattern. Specifically, the coating die 32 can extrude the rubber material onto the coating roller 34. The coating roller 34, through a rolling process, can transfer the slurry thereon to the base tape 200 and roll out a coating pattern corresponding to the rolling pattern on the base tape 200.

[0025] In the application, the coating mechanism 3 can coat the slurry on the base strip 200 and can coat the corresponding coating layer on the base strip 200, the adjusting drive 35 can drive the coating die 32 to move along the axial direction of the coating roller 34, so that the coating mechanism 3 can coat the corresponding coating layer at different positions in the width direction of the base strip 200; the drying mechanism 4 can dry the base strip 200 behind the coating mechanism 3; the coating mechanism 3 and the drying mechanism 4 are both provided in plurality, and the coating mechanism 3 and the drying mechanism 4 are alternately and spacedly arranged, after the base strip 200 passes through the coating treatment of the plurality of coating mechanisms 3, each coating mechanism 3 can coat the corresponding coating layer on the base strip 200, and the plurality of coating layers can be spacedly distributed on the base strip 200 in the width direction or can be stackedly distributed on the base strip 200 in the width direction, so that the multi-layer coating equipment can manufacture different kinds of electrode materials (positive electrode material or negative electrode material) to meet the requirements of experiments on a plurality of electrode materials. In addition, after experimental verification, the multi-layer coating equipment can also be applied to actual production.

[0026] In the application, the coating mechanism 3 adopts the roller coating mode, after the base strip 200 passes through the coating mechanism 3, the coating layer on the base strip 200 is easy to dry, so that a drying mechanism 4 is arranged behind each coating mechanism 3, and the drying mechanism 4 can dry the coating layer on the base strip 200 in a short time.

[0027] In an embodiment, as shown in Figure 2 The unwinding mechanism 1 includes an unwinding seat 11, an unwinding support plate 12, an unwinding drive 13, an unwinding roller 14, an unwinding deviation correction drive, and a deviation correction sensor 16 provided with a first sensing groove 161; the unwinding support plate 12 is slidingly installed on the unwinding seat 11; the unwinding deviation correction drive is installed on the unwinding seat 11 and is connected to the unwinding support plate 12 for driving the unwinding support plate 12 to move; the unwinding roller 14 is rotatably installed on the unwinding support plate 12 and is used for winding the base strip 200; the output end of the unwinding drive 13 is connected to the unwinding roller 14; The deviation correction sensor 16 and the unwinding seat 11 are both installed on the base 10, and the base strip 200 released by the unwinding roller 14 enters the coating mechanism 3 after passing through the first sensing groove 161.

[0028] Among them, the unwinding and correcting driving components include but are not limited to pneumatic cylinders, hydraulic cylinders and linear motors; the unwinding driving components 13 include but are not limited to motors; the correction sensors 16 include but are not limited to laser sensors 67; the unwinding and correcting driving components can drive the unwinding roller 14 to move toward or away from the base 10; the unwinding support plate 12 can be slidably installed on the unwinding seat 11 through a guide rail slider assembly, a guide rod sliding assembly, etc.

[0029] Specifically, the unwinding drive 13 can drive the unwinding roller 14 to rotate, and the unwinding roller 14 can release the base tape 200 forward; when the correction sensor 16 detects that the base tape 200 is deviated, the unwinding correction drive can drive the unwinding support plate 12 and the unwinding roller 14 thereon to move until the unwinding correction drive detects that the base tape 200 is not deviated.

[0030] In this embodiment, the unwinding mechanism 1 not only has the function of unwinding, but also has the function of correcting deviation, thereby ensuring the position accuracy of the base tape 200 released by the unwinding mechanism 1 .

[0031] In one embodiment, the winding mechanism 2 includes a winding seat, a winding support plate, a winding drive, a winding roller, a winding correction drive, and a correction sensor 16 provided with a second sensing groove; the winding support plate is slidably mounted on the winding seat; the winding correction drive is mounted on the winding seat and connected to the winding support plate, and is used to drive the winding support plate to move; the winding roller is rotatably mounted on the winding support plate and is used to wind the base tape 200; the output end of the winding drive is connected to the winding roller; The deviation correction sensor 16 and the winding seat are both installed on the base 10 . The base tape 200 released by the drying mechanism 4 passes through the second sensing groove and then enters the winding mechanism 2 .

[0032] Among them, the winding and correcting drive components include but are not limited to pneumatic cylinders, hydraulic cylinders and linear motors; the winding drive components include but are not limited to motors; the correction sensor 16 includes but is not limited to laser sensors 67; the winding and correcting drive components can drive the winding roller to move toward or away from the base 10; the winding support plate can be slidably installed on the winding seat through a guide rail slider assembly, a guide rod sliding assembly, etc.

[0033] Specifically, the winding drive can drive the winding roller to rotate, and the winding roller can release the base belt 200 forward; when the correction sensor 16 detects that the base belt 200 is deviated, the winding correction drive can drive the winding support plate and the winding roller thereon to move until the winding correction drive detects that the base belt 200 is not deviated.

[0034] In one embodiment, if Figure 1 and Figure 4 As shown, the multi-layer coating device further includes an ultrasonic cleaning mechanism 5, which includes an ultrasonic base 51, an ultrasonic lifting drive member 52, an ultrasonic support plate 53, an ultrasonic cover plate 54, a plurality of ultrasonic guide rollers 55 and an ultrasonic cleaning box 56 provided with a cleaning space 561; The ultrasonic cover plate 54 is installed on the ultrasonic support plate 53 and is used to open or cover the cleaning space 561; All the ultrasonic guide rollers 55 are installed at intervals on the ultrasonic support plate 53, and the base tape 200 released by the unwinding mechanism 1 passes through all the ultrasonic guide rollers 55 in sequence and then enters the coating mechanism 3; The ultrasonic base 51 is mounted on the base 10 , the ultrasonic lifting drive 52 is mounted on the ultrasonic base 51 , and the output end of the ultrasonic lifting drive 52 is connected to the ultrasonic cleaning box 56 ; The ultrasonic lifting drive 52 is used to drive the ultrasonic cleaning box 56 to move, so that the ultrasonic guide roller 55 is inserted into the cleaning space 561 and the ultrasonic cover 54 covers the cleaning space 561, or the ultrasonic guide roller 55 is away from the cleaning space 561 and the ultrasonic cover 54 opens the cleaning space 561.

[0035] The ultrasonic lifting drive 52 includes, but is not limited to, a pneumatic cylinder, a hydraulic cylinder, a screw-nut assembly, etc.; the ultrasonic cleaning box 56 can be slidably mounted on the ultrasonic base 51 via a guide rail slider assembly, a guide rod sleeve assembly, etc.; the ultrasonic cover 54 is located above the ultrasonic cleaning box 56, and the top of the ultrasonic cleaning box 56 is open. The number of ultrasonic guide rollers 55 can be set according to actual needs, and the ultrasonic guide rollers 55 can be distributed alternately in the vertical direction. An ultrasonic vibrator is installed in the ultrasonic cleaning box 56. When the ultrasonic vibrator is in operation, it can generate high-frequency impact to generate bubbles in the liquid in the cleaning space 561. The bubbles will impact the surface of the base belt 200, thereby completing the cleaning of the base belt 200.

[0036] Specifically, the ultrasonic lifting drive 52 can drive the ultrasonic cleaning box 56 to move upward until the ultrasonic guide roller 55 is inserted into the cleaning space 561 and the ultrasonic cover 54 covers the cleaning space 561, and the cleaning liquid in the ultrasonic cleaning box 56 can complete the ultrasonic cleaning of the base belt 200; after the base belt 200 on the ultrasonic guide roller 55 is cleaned, the ultrasonic lifting drive 52 can drive the ultrasonic cleaning box 56 to move downward, so that the ultrasonic guide roller 55 is away from the cleaning space 561 and the ultrasonic cover 54 opens the cleaning space 561, so that the cleaned base belt 200 can be transported to the coating mechanism 3.

[0037] In the embodiment, the design of the ultrasonic cleaning mechanism 5 ensures the cleanliness of the base tape 200 entering the coating mechanism 3, thereby ensuring the coating quality of the base tape 200.

[0038] In an embodiment, as shown in Figure 1 and Figure 5 The multi-layer coating device further comprises a tension adjusting mechanism 6, the tension adjusting mechanism 6 comprises a swing driving assembly 61, a swing frame 62, a swing roller 63, a counterweight roller 64 and a swing shaft 65; the swing shaft 65 is installed on the base 10, and the swing frame 62 is rotatably installed on the swing shaft 65; The swing roller 63 and the counterweight roller 64 are both installed on the swing frame 62, and the swing roller 63 and the counterweight roller 64 are respectively located on opposite sides of the swing shaft 65; The output end of the swing driving assembly 61 is connected to the swing frame 62, for driving the swing frame 62 to rotate around the swing shaft 65; The base tape 200 released by the unwinding mechanism 1 enters the coating mechanism 3 after passing around the swing roller 63.

[0039] The swing driving assembly 61 comprises but is not limited to a pneumatic cylinder, a hydraulic cylinder and the like, and the tension adjusting mechanism 6 can be provided according to actual needs. One tension adjusting mechanism 6 can be provided between the unwinding mechanism 1 and the first coating mechanism 3, which can ensure the tension of the base tape 200 input into the coating mechanism 3. One tension adjusting mechanism 6 can also be provided between the last drying mechanism 4 and the winding mechanism 2, which can ensure the tension of the base tape 200 wound into the winding mechanism 2. The swing roller 63 and the counterweight roller 64 are respectively located on the left and right sides of the swing shaft 65.

[0040] Specifically, the base tape 200 passes around the swing roller 63, and due to the gravity of the counterweight roller 64, the swing roller 63 will maintain a pulling force on the base tape 200, so that the base tape 200 has a certain tension. Normally, the swing roller 63 is in a horizontal state. When the swing roller 63 deviates from the horizontal state, the swing driving assembly 61 can drive the swing frame 62 to rotate around the swing shaft 65 until the swing roller 63 rotates to the horizontal state, so that the swing roller 63 restores to the preset tension state of the base tape 200.

[0041] In the embodiment, the tension adjusting mechanism 6 can adjust the tension of the base tape 200, thereby improving the coating quality of the base tape 200.

[0042] In an embodiment, as shown in Figure 1 and Figure 5As shown, the swing drive assembly 61 includes a linear drive member 611 and a rocker arm 612. The linear drive member 611 is mounted on the base 10. The output end of the linear drive member 611 is rotatably connected to the rocker arm 612. The rocker arm 612 is rotatably sleeved on the swing shaft 65 and connected to the swing frame 62. The tension adjustment mechanism 6 also includes a sensor 66 and a sensor 67 arranged opposite to the sensor 66. The sensor 66 is installed on the rocker arm 612, and the sensor 67 is installed on the base 10. The sensor 66 and the sensor 67 are used to detect the swing angles of the rocker arm 612 and the swing frame 62.

[0043] The linear drive component 611 includes but is not limited to a pneumatic cylinder, a hydraulic cylinder, etc., the sensor 67 includes but is not limited to a laser sensor, etc., and the sensor 66 includes but is not limited to a convex portion, an iron sheet, etc.

[0044] Specifically, when the sensor 67 detects through the sensor 66 that the rocker arm 612 deviates from the preset position, it indicates that the swing roller 63 is not in a horizontal state; the linear drive member 611 drives the swing frame 62 to rotate through the rocker arm 612 until the sensor 67 detects through the sensor 66 that the rocker arm 612 returns to the preset position. At this time, the swing roller 63 is in a horizontal state.

[0045] In this embodiment, the tension adjustment mechanism 6 has a compact structure and convenient adjustment operation.

[0046] In one embodiment, if Figure 1 and Figure 6 As shown, the multi-layer coating device further includes a splicing mechanism 7, which includes a first splicing roller 71, a second splicing roller 72, and a splicing seat 73 installed on the base 10; One end of the first splicing roller 71 is rotatably mounted on the splicing seat 73, and the other end of the first splicing roller 71 is detachably mounted on the splicing seat 73; the first splicing roller 71 is used to press the base tape 200 onto the splicing seat 73; One end of the second splicing roller 72 is rotatably mounted on the splicing seat 73 , and the other end of the second splicing roller 72 is detachably mounted on the splicing seat 73 ; the second splicing roller 72 is used to press the base tape 200 onto the splicing seat 73 .

[0047] Among them, one end of the first connecting roller 71 can be detachably installed on the connecting seat 73 through a plug-in structure, a clamping structure, etc., and one end of the second connecting roller 72 can also be detachably installed on the connecting seat 73 through a plug-in structure, a clamping structure, etc.

[0048] When the multi-layer coating device is in normal working condition, the first splicing roller 71 and the second splicing roller 72 do not press the base tape 200, and the base tape 200 released by the unwinding mechanism 1 can smoothly enter the convex mechanism; when the multi-layer coating device needs to be replaced with a new base tape 200, the first splicing roller 71 presses the old base tape 200 from the front, and the second splicing roller 72 presses the new base tape 200 from the back, and the new and old base tapes 200 are simultaneously disassembled and the connection between the two is completed.

[0049] In this embodiment, the design of the tape splicing mechanism 7 facilitates the replacement of the multi-layer coating device with a new base tape 200 .

[0050] In one embodiment, if Figure 1 and Figure 7 As shown, the multi-layer coating device further includes an air drying mechanism 8; the air drying mechanism 8 includes a heating element (not shown in the figure), an air intake pump 81, an exhaust pump 82 and a drying box 83 provided with a drying space, and the drying box 83 is mounted on the base 10; The heating element is installed in the drying space and is used to heat the gas in the drying space; The air intake pump 81 is connected to the inlet of the drying space, and the air exhaust pump 82 is connected to the outlet of the drying space; The base tape 200 released by the unwinding mechanism 1 passes through the drying space and then enters the coating mechanism 3 .

[0051] Among them, the heating elements include but are not limited to heating wires, heating rods, etc. After the heating elements are powered on, they can heat the gas in the drying space; the air-drying mechanism 8 is arranged between the first coating mechanism 3 and the unwinding mechanism 1, thereby ensuring the dryness of the base tape 200 entering the first coating mechanism 3.

[0052] Specifically, the air intake pump 81 can blow external air into the drying space, the exhaust pump 82 can discharge the air in the drying space, and the heating element can add air to the drying space. After the base tape 200 is processed by the air-drying mechanism 8, the moisture on the base tape 200 can be taken away, thereby ensuring the dryness of the base tape 200 entering the first coating mechanism 3.

[0053] In one embodiment, if Figure 1 and Figure 3 As shown, the coating mechanism 3 includes a coating seat 31, a coating die head 32, a coating drive 33 and a coating roller 34, and the coating seat 31 is installed on the base 10; The coating roller 34 is rotatably mounted on the coating seat 31 , and the output end of the coating drive is connected to the coating roller 34 ; The coating die head 32 is mounted on the coating seat 31 and is disposed opposite to the coating roller 34 .

[0054] The coating drive component 33 includes but is not limited to a motor and the like.

[0055] Specifically, the coating die 32 can extrude the slurry onto the coating roller 34. The coating roller 34 can transfer the slurry thereon to the base tape 200 through a rolling process and roll out a coating pattern corresponding to the rolling pattern on the base tape 200. It should be noted that the multi-layer coating device is not limited to the coating mechanism 3.

[0056] In one embodiment, if Figure 1 and Figure 8 As shown, the multi-layer coating device further includes an air knife 101, an electrostatic elimination mechanism 102 and a corona mechanism 103; The base tape 200 released by the unwinding mechanism 1 passes through the blowing of the air knife 101 , the static elimination treatment of the static elimination mechanism 102 , and the corona treatment of the corona mechanism 103 in sequence before entering the coating mechanism 3 .

[0057] Specifically, the air knife 101 can blow gas toward the base tape 200 , the static elimination mechanism 102 can eliminate static electricity in the base tape 200 , and the corona mechanism 103 can perform corona treatment on the base tape 200 , thereby improving the characteristics of the base tape 200 and improving the coating quality of the base tape 200 .

[0058] In one embodiment, if Figure 1 As shown, the multi-layer coating device further includes a driving mechanism 104 , and the driving mechanism 104 is used to provide power for the base tape 200 between the unwinding mechanism 1 and the rewinding mechanism 2 .

[0059] Among them, multiple driving mechanisms 104 can be set according to actual needs; one driving mechanism 104 can be set between the unwinding mechanism 1 and the first coating mechanism 3; and another driving mechanism 104 can be set between the last drying mechanism 4 and the winding mechanism 2.

[0060] In this embodiment, the design of the driving mechanism 104 ensures the stability of the base tape 200 when being transferred between the unwinding mechanism 1 and the rewinding mechanism 2 .

[0061] In one embodiment, the drive mechanism 104 includes a rotary drive member, a driving roller, and a pressure roller. The output end of the rotary drive member is connected to the driving roller, and the base belt 200 passes through the gap between the driving roller and the pressure roller. The rotary drive member can drive the driving roller to rotate, and the driving roller drives the base belt 200 to move through friction.

[0062] In summary, the process flow of the multi-layer coating equipment is as follows: the unwinding mechanism 1 releases the base tape 200, the tension adjustment mechanism 6 adjusts the tension of the base tape 200, the ultrasonic cleaning mechanism 5 ultrasonically cleans the base tape 200, the air drying mechanism 8 air-dries the base tape 200, the tension adjustment mechanism 6 adjusts the tension of the base tape 200, the air knife 101 blows air on the base tape 200, the static elimination mechanism 102 performs static elimination on the base tape 200, the corona discharge mechanism 103 performs corona treatment on the base tape 200, the coating mechanism 3 and the drying mechanism 4 sequentially coat and dry the base tape 200, the tension adjustment mechanism 6 adjusts the tension of the base tape 200, and the rewinding mechanism 2 rewinds the base tape 200. A splicing mechanism 7 is provided between the unwinding mechanism 1 and the first tension adjustment mechanism 6, and a splicing mechanism 7 is also provided between the last tension adjustment mechanism 6 and the rewinding mechanism 2.

[0063] Another embodiment of the present invention further provides a coating method, which is applied to the above-mentioned multi-layer coating device, comprising: Controlling the unwinding mechanism 1 to release the base tape 200 and controlling the rewinding mechanism 2 to rewind the base tape 200; like Figure 9 As shown, if a full-layer coating instruction is received, the adjustment drive member 35 is controlled to drive the coating die head 32 to move along the axial direction of the coating roller 34, so as to sequentially coat multiple first coating layers 201 on the base tape 200 through the multiple coating mechanisms 3, and the multiple drying mechanisms 4 are controlled to sequentially dry the first coating layers 201; wherein, each first coating layer 201 is formed by coating on the base tape 200 by one coating mechanism 3, and all the first coating layers 201 on the base tape 200 are arranged in an overlapping manner; like Figure 10 As shown, if an interval coating instruction is received, the adjustment driving member 35 is controlled to drive the coating die head 32 to move along the axial direction of the coating roller 34, so as to sequentially coat multiple second coating layers 202 on the base tape 200 through multiple coating mechanisms 3, and the multiple drying mechanisms 4 are controlled to sequentially dry the second coating layers 202; wherein, each second coating layer 202 is formed by coating on the base tape 200 by one coating mechanism 3, and any two second coating layers 202 coated on the base tape 200 are spaced apart; like Figure 11As shown, if a partial lamination coating instruction is received, the control adjustment drive 35 drives the coating die 32 to move along the axial direction of the coating roller 34, so as to sequentially coat multiple third coating layers 203 on the base tape 200 through multiple coating mechanisms 3, and the drying mechanism 4 is controlled to sequentially dry the third coating layers 203; wherein, each of the third coating layers 203 is formed by coating on the base tape 200 by a coating mechanism 3, and the base tape 200 has two adjacent third coating layers 203 partially overlapping each other.

[0064] Specifically, when receiving the full-layer coating instruction, the adjustment drive 35 moves the coating die 32, and the first coating layer 201 coated by the coating die 32 fully covers the base tape 200 in the width direction (that is, the width of the first coating layer 201 is equal to the width of the lace), so that after the base tape 200 is coated by multiple coating mechanisms 3, multiple first coating layers 201 can be stacked on the base tape 200; it should be noted that the slurry, coating pattern, etc. of each first coating layer 201 can be different, so that each first coating layer 201 is different from each other.

[0065] When receiving the interval coating instruction, the coating die 32 is moved by the adjustment drive 35, and the second coating layer 202 coated by the coating die 32 partially covers the base tape 200 along the width direction (that is, the width of the second coating layer 202 is smaller than the width of the lace), so that after the base tape 200 is coated by multiple coating mechanisms 3, multiple second coating layers 202 are distributed on the base tape 200 at intervals along the width direction; it should be noted that the slurry, coating pattern, etc. of each second coating layer 202 can be different, so that each second coating layer 202 is different from each other.

[0066] When receiving the partial lamination coating instruction, the adjustment drive 35 moves the coating die 32, and the third coating layer 203 coated by the coating die 32 partially covers the base tape 200 along the width direction (that is, the width of the third coating layer 203 is smaller than the width of the lace), so that after the base tape 200 is coated by multiple coating mechanisms 3, multiple third coating layers 203 are sequentially distributed on the base tape 200 along the width direction, and there is partial overlap between two adjacent third coating layers 203; it should be noted that the slurry, coating pattern, etc. of each third coating layer 203 can be different, so that each third coating layer 203 is different from each other.

[0067] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention, and should all be included in the scope of protection of the present invention.

Claims

1. A multi-layer coating device, characterized in that, The apparatus comprises a base, an unwinding mechanism, a rewinding mechanism, a plurality of coating mechanisms and a plurality of drying mechanisms; the unwinding mechanism, the rewinding mechanism, the coating mechanism and the drying mechanism are all mounted on the base, and the coating mechanisms and the drying mechanisms are alternately arranged; The base tape released by the unwinding mechanism passes through the coating mechanism and the drying mechanism and is then wound on the winding mechanism. The coating mechanism is used to coat the slurry on the base tape and roll out a coating pattern on the base tape. The drying mechanism is used to dry the base tape after coating by the coating mechanism. The coating mechanism includes a coating seat, a coating die, a coating drive, an adjusting drive and a coating roller, wherein the coating seat is mounted on the base; the coating roller is rotatably mounted on the coating seat, and the output end of the coating drive is connected to the coating roller; the coating die is slidably mounted on the coating seat and is arranged opposite to the coating roller; the adjusting drive is mounted on the coating seat, and the output end of the adjusting drive is connected to the coating die, and the adjusting drive is used to drive the coating die to move along the axial direction of the coating roller.

2. The multi-layer coating device according to claim 1, characterized in that The unwinding mechanism includes an unwinding seat, an unwinding support plate, an unwinding drive, an unwinding roller, an unwinding correction drive, and a correction sensor provided with a first sensing groove; the unwinding support plate is slidably mounted on the unwinding seat; the unwinding correction drive is mounted on the unwinding seat and connected to the unwinding support plate, and is used to drive the unwinding support plate to move; the unwinding roller is rotatably mounted on the unwinding support plate and is used to wind the base tape; the output end of the unwinding drive is connected to the unwinding roller; The deviation correction sensor and the unwinding seat are both installed on the base, and the base tape released by the unwinding roller passes through the first sensing groove and then enters the coating mechanism.

3. The multi-layer coating device according to claim 1, characterized in that The multi-layer coating equipment further includes an ultrasonic cleaning mechanism, which includes an ultrasonic base, an ultrasonic lifting drive member, an ultrasonic support plate, an ultrasonic cover plate, a plurality of ultrasonic guide rollers, and an ultrasonic cleaning box provided with a cleaning space; The ultrasonic cover plate is mounted on the ultrasonic support plate and is used to open or close the cleaning space; All the ultrasonic guide rollers are installed at intervals on the ultrasonic support plate, and the base tape released by the unwinding mechanism passes through all the ultrasonic guide rollers in sequence and then enters the coating mechanism; The ultrasonic seat is installed on the base, the ultrasonic lifting drive member is installed on the ultrasonic seat, and the output end of the ultrasonic lifting drive member is connected to the ultrasonic cleaning box; The ultrasonic lifting drive member is used to drive the ultrasonic cleaning box to move, so that the ultrasonic guide roller is inserted into the cleaning space and the ultrasonic cover plate covers the cleaning space, or the ultrasonic guide roller is away from the cleaning space and the ultrasonic cover plate opens the cleaning space.

4. The multi-layer coating device according to claim 1, characterized in that The multi-layer coating device further includes a tension adjustment mechanism, which includes a swing drive assembly, a swing frame, a swing roller, a counterweight roller, and a swing shaft; the swing shaft is mounted on the base, and the swing frame is rotatably mounted on the swing shaft; The swing roller and the counterweight roller are both mounted on the swing frame, and the swing roller and the counterweight roller are respectively located on opposite sides of the swing shaft; The output end of the swing drive assembly is connected to the swing frame, and is used to drive the swing frame to rotate around the swing axis; The base tape released by the unwinding mechanism passes around the swing roller and then enters the coating mechanism.

5. The multi-layer coating device according to claim 4, characterized in that The swing drive assembly includes a linear drive member and a rocker arm, wherein the linear drive member is mounted on the base, the output end of the linear drive member is rotatably connected to the rocker arm, and the rocker arm is rotatably sleeved on the swing shaft and connected to the swing frame; The tension adjustment mechanism also includes a sensor and a transducer arranged opposite to the sensor, the sensor is mounted on the rocker arm, and the sensor is mounted on the base, and the sensor and the transducer are used to detect the swing angles of the rocker arm and the swing frame.

6. The multi-layer coating device according to claim 1, characterized in that The multi-layer coating device further comprises a belt splicing mechanism, wherein the belt splicing mechanism comprises a first belt splicing roller, a second belt splicing roller and a belt splicing seat mounted on the base; One end of the first splicing roller is rotatably mounted on the splicing seat, and the other end of the first splicing roller is detachably mounted on the splicing seat; the first splicing roller is used to press the base belt onto the splicing seat; One end of the second splicing roller is rotatably mounted on the splicing seat, and the other end of the second splicing roller is detachably mounted on the splicing seat; the second splicing roller is used to press the base belt onto the splicing seat.

7. The multi-layer coating device according to claim 1, characterized in that The multi-layer coating device further includes an air drying mechanism; the air drying mechanism includes a heating element, an air intake pump, an exhaust pump, and a drying box with a drying space, and the drying box is installed on the base; The heating element is installed in the drying space and is used to heat the gas in the drying space; The air intake pump is connected to the inlet of the drying space, and the air exhaust pump is connected to the outlet of the drying space; The base tape released by the unwinding mechanism passes through the drying space and then enters the coating mechanism.

8. The multi-layer coating device according to claim 1, characterized in that The multi-layer coating device also includes an air knife, a static elimination mechanism and a corona mechanism; The base tape released by the unwinding mechanism is sequentially blown by the air knife, subjected to static elimination treatment by the static elimination mechanism, and subjected to corona treatment by the corona mechanism before entering the coating mechanism.

9. The multi-layer coating device according to claim 1, characterized in that The multi-layer coating device further includes a driving mechanism, which is used to provide power for the base belt between the unwinding mechanism and the winding mechanism.

10. A coating method, applied to the multi-layer coating device according to any one of claims 1 to 9, characterized in that: include: Controlling the unwinding mechanism to release the base tape, and controlling the rewinding mechanism to rewind the base tape; If a full-layer coating instruction is received, the adjustment drive member is controlled to drive the coating die head to move axially along the coating roller, so as to sequentially coat multiple first coating layers on the base tape through the multiple coating mechanisms, and the multiple drying mechanisms are controlled to sequentially dry the first coating layers; wherein each first coating layer is formed by coating on the base tape by one coating mechanism, and all the first coating layers on the base tape are arranged in an overlapping manner; If an interval coating instruction is received, the adjustment driving member is controlled to drive the coating die head to move along the axial direction of the coating roller, so as to sequentially coat multiple second coating layers on the base belt through the multiple coating mechanisms, and the multiple drying mechanisms are controlled to sequentially dry the second coating layers; wherein each second coating layer is formed by coating on the base belt by one coating mechanism, and any two second coating layers coated on the base belt are spaced apart; If a partial lamination coating instruction is received, the control adjustment drive member drives the coating die head to move along the axial direction of the coating roller, so as to sequentially coat multiple third coating layers on the base belt through multiple coating mechanisms, and the drying mechanism is controlled to sequentially dry the third coating layers; wherein each of the third coating layers is formed by coating on the base belt by a coating mechanism, and two adjacent third coating layers on the base belt are partially overlapped.

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