Integrated extrusion and gravure coater

Abstract

The utility model discloses extrusion and gravure coating integrated machine, including fuselage, first machine head and second machine head, the fuselage is divided into at least two layers, and first machine head and second machine head are divided in the same layer both sides of fuselage, first machine head and second machine head all include each other's corresponding lifting roll, gravure coating equipment, extrusion coating equipment and back roll, and the lifting roll is arranged between gravure coating equipment and extrusion coating equipment, and the lifting roll, extrusion coating equipment output end and gravure coating equipment output end height are different, the utility model discloses beneficial effect: through the integration two different coating equipment in the machine head, gather the advantage of two coating equipment, through different belt mode, can satisfy different mode coating, and then guarantee the pole piece coating of different thickness, and the whole extrusion and gravure coating integrated machine integration degree is high, and the structure is compact, and the applicability is high.

Description

Technical Field

[0001] This utility model relates to the field of lithium battery production equipment, and in particular to an integrated extrusion and gravure coating machine. Background Technology

[0002] Coating is the process of evenly applying a slurry with a certain viscosity and solid content onto a substrate, followed by drying in an oven to form an electrode sheet with a specific areal density and size. In the lithium-ion battery electrode sheet production process, the quality of the electrode sheet coating directly determines the battery's safety performance and capacity consistency. The quality of the coating depends on both the coating effect and the drying effect.

[0003] In the existing technology, there are generally two coating methods: one is extrusion coating, which achieves coating by extrusion, but this method cannot meet the requirements of low design thickness; the other is gravure coating, which achieves coating by applying slurry, but this coating method cannot meet the requirements of higher coating thickness.

[0004] The information disclosed in this background section is intended only to enhance the understanding of the overall background of this utility model and should not be construed as an admission or in any way implying that the information constitutes prior art known to those skilled in the art. Utility Model Content

[0005] The technical problem to be solved by this utility model is to solve the problem that a coating machine cannot simultaneously achieve the design requirements of high thickness and low thickness.

[0006] This utility model solves the above-mentioned technical problems through the following technical means:

[0007] This utility model claims protection for an integrated extrusion and gravure coating machine, including a machine body, a first die head, and a second die head; the machine body is divided into at least two layers, and the first die head and the second die head are respectively placed on both sides of the same layer of the machine body;

[0008] Both the first and second die heads include corresponding lifting rollers, gravure coating equipment, extrusion coating equipment, and back rollers. Lifting rollers are set between the gravure coating equipment and the extrusion coating equipment. The lifting rollers, the output ends of the extrusion coating equipment, and the output ends of the gravure coating equipment are at different heights.

[0009] By integrating two different coating devices within the die head, the advantages of both coating devices are combined. Different conveyor belt methods can meet different coating requirements, thereby ensuring coating of electrode sheets of different thicknesses. The entire extrusion and gravure coating integrated machine has a high degree of integration, compact structure, and high applicability.

[0010] Preferably, the first and second heads further include a frame, an inlet roller, and an outlet roller. The inlet roller and the outlet roller are provided on one side of the frame, with the outlet roller located above the inlet roller.

[0011] The frame is used to fix the various components, and the lead-in roller and lead-out roller are used to lead the electrode sheets into or out of the die head.

[0012] Preferably, a gravure coating device is installed on the frame. The gravure coating device includes a gravure trough, a gravure roller assembly, and a pressure roller body. The gravure trough is installed on the frame, and the gravure roller assembly is installed inside the gravure trough. The pressure roller body is installed directly above the output end of the gravure roller assembly.

[0013] Preferably, the gravure coating equipment further includes a first adjustment component, which is installed on the frame and drives the pressure roller body to control the gap between the pressure roller body and the output end of the gravure roller assembly.

[0014] By adjusting the first adjusting component, the gap between the pressure roller body and the output end of the gravure roller assembly is adjusted, so that the electrode sheet is tightly attached to the output end of the gravure roller assembly.

[0015] Preferably, the gravure coating equipment also includes a doctor blade assembly, which is further mounted on a frame located on the side of the gravure roller assembly.

[0016] The doctor blade assembly is used to adjust the coating thickness.

[0017] Preferably, an extrusion coating device is installed on the frame. The extrusion coating device includes a glue roller assembly and a die assembly. The glue roller assembly is installed on the frame, and a die assembly is also installed on one side of the first back roller.

[0018] By rationally setting the lifting rollers, the two coating paths are separated from each other and do not interfere with each other. Furthermore, the two coating devices share the inlet roller, back roller, and outlet roller, resulting in a reasonable structural layout, reducing idle space and waste, and making it highly applicable.

[0019] Preferably, the extrusion coating machine further includes a second adjustment mechanism, wherein the glue roller assembly is configured to adjust the gap between the output end of the glue roller assembly and the roller body.

[0020] The gap between the output end of the rubber roller assembly and the roller body is adjusted by the second adjustment mechanism, so that the electrode sheet is pressed against the output end of the rubber roller assembly.

[0021] Preferably, the first and second heads also include guide rollers, which are arranged on the frame along the conveying path.

[0022] Steering rollers are used to turn the electrode sheets to fit the conveying path.

[0023] Preferably, the first and second heads also include tension rollers, which are arranged along the conveying path on the frame.

[0024] Tensioning rollers are used to tension the electrode sheets.

[0025] Preferably, it also includes a winding mechanism, an unwinding mechanism, a first surface density meter, a first die head, a lower drying oven, a first traction mechanism, a second surface density meter, and a second die head, all disposed on the lower layer of the machine body;

[0026] It also includes a third surface density meter, a second traction mechanism, and an upper drying oven, all located on the upper part of the machine body;

[0027] A ramp mechanism is installed between the upper and lower levels.

[0028] Along the conveying direction, the electrode sheets are unwound sequentially by the unwinding mechanism, measured by the first density meter, and then coated on the first side by the first die head. The first side then enters the lower drying oven for drying.

[0029] Then, pulled by the first traction mechanism, and after being measured by the two-sided density meter, it enters the second head to perform the second-sided coating action. Pulled by the climbing mechanism, the second side enters the upper drying oven for drying. Pulled by the second traction mechanism, and after being measured by the third-sided density meter, it is wound up to the winding mechanism. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of the integrated extrusion and gravure coating machine in this embodiment of the present invention;

[0031] Figure 2 This is a schematic diagram of the structure of the first machine head in an embodiment of this utility model;

[0032] Figure 3 This is a trend diagram of the first head electrode in an embodiment of this utility model;

[0033] Figure 4 This is a schematic diagram of the structure of the second machine head in an embodiment of this utility model;

[0034] Figure 5 This is a trend diagram of the second head electrode in this embodiment of the present invention;

[0035] 10. Winding mechanism; 11. Unwinding mechanism; 12. First surface density meter;

[0036] 13. First printing head; 130. First frame; 131. First introductory roller; 1320. Gravure groove; 1321. Conveying pipe; 1322. Gravure roller assembly; 1323. Pressure roller body; 1324. First adjusting assembly; 1325. Scraper assembly;

[0037] 133. First roller lifting;

[0038] 1340. Adhesive roller assembly; 1341. Second adjustment mechanism; 1342. Die head assembly;

[0039] 135. First back roller; 136. First lead-out roller;

[0040] 14. Lower drying oven; 15. First traction mechanism; 16. Second surface density meter;

[0041] 17. Second die head; 170. Second frame; 171. Second inlet roller; 172. Second gravure coating equipment; 173. Second lifting roller; 174. Second extrusion coating equipment; 175. Second back roller;

[0042] 18. Third surface density meter; 19. Second traction mechanism; 20. Upper drying oven; 21. Climbing mechanism;

[0043] a. First road; b. Second road; c. Third road; d. Fourth road. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below in conjunction with the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0045] See Figure 1 This embodiment requires protection of the extrusion and gravure coating integrated machine. The machine body is divided into two layers. The lower layer includes a winding mechanism 10, an unwinding mechanism 11, a first surface density meter 12, a first die head 13, a lower drying oven 14, a first traction mechanism 15, a second surface density meter 16, and a second die head 17. The upper layer includes a third surface density meter 18, a second traction mechanism 19, and an upper drying oven 20. A climbing mechanism 21 is provided between the upper and lower layers.

[0046] Along the conveying direction, the electrode sheets are unwound sequentially by the unwinding mechanism 11, measured by the first surface density meter 12, and then coated on the first surface by the first machine head 13. The first surface then enters the lower drying oven 14 for drying.

[0047] Then, it is pulled by the first traction mechanism 15, and after being measured by the two-sided density meter, it enters the second machine head 17 to perform the second-sided coating. It is pulled by the climbing mechanism 21, and the second side enters the upper drying oven 20 for drying. It is pulled by the second traction mechanism 19, and after being measured by the third-sided density meter 18, it is wound up to the winding mechanism 10.

[0048] See Figures 2 to 3This embodiment mainly focuses on the improvement of the first head 13 and the second head 17. The others are all existing technologies and will not be described in detail. Specifically, the first head 13 includes a first frame 130, a first introductory roller 131, a first gravure coating device, a first lifting roller 133, a first extrusion coating device, a first back roller 135, and a first outtroductory roller 136.

[0049] A first introductory roller 131 is provided on one side of the first frame 130. Along the conveying direction, a first gravure coating device and a first extrusion coating device are provided on the first frame 130. The first gravure coating device and the first extrusion coating device are at different heights. Preferably, the first extrusion coating device is higher than the first gravure coating device. A first outgoing roller 136 is provided on the first frame 130 above the first introductory roller 131.

[0050] At this time, the first surface can be coated by using either the first gravure coating equipment or the first extrusion coating equipment through two different belt threading methods within the first head 13. Specifically:

[0051] In the first threading method, the electrode sheet passes through the first introductory roller 131, the first gravure coating equipment, the first back roller 135, and the first outtroductory roller 136 to form the first sheet path a.

[0052] Specifically, the first gravure coating equipment includes at least a gravure trough 1320, a conveying pipe 1321, a gravure roller assembly 1322, a pressure roller body 1323, a first adjusting assembly 1324, and a doctor blade assembly 1325; the gravure trough 1320 is provided on the first frame 130, and the slurry is introduced into the gravure trough 1320 through the conveying pipe 1321; the gravure roller assembly 1322 is partially provided inside the gravure trough 1322, and the output end of the gravure roller assembly 1322 rotates to transfer the slurry to the first surface. The upper part performs gravure coating operation; a pressure roller body 1323 is set directly above the output end of the gravure roller assembly 1322. The pressure roller body 1323 is driven by the first adjustment component 1324 to control the gap between the pressure roller body 1323 and the output end of the gravure roller assembly 1322; a doctor blade assembly 1325 is also set on the side of the gravure roller assembly 1322. The doctor blade assembly 1325 is used to adjust the coating thickness. The above components are all conventional technologies of existing first gravure coating equipment and will not be described in detail.

[0053] In the second threading method, the electrode sheet passes through the first inlet roller 131, the first lifting roller 133, the first extrusion coating equipment, the first back roller 135, and the first outlet roller 136 to form the second sheet path b.

[0054] Specifically, a first lifting roller 133 is provided between the first inlet roller 131 and the first extrusion coating equipment. The first lifting roller 133 is used to change the electrode conveying direction and separate the second sheet path b and the first sheet path a to avoid interference between them. The first extrusion coating equipment includes at least a glue roller assembly 1340, a second adjusting mechanism 1341 and a die assembly 1342. The glue roller assembly 1340 is provided on the first frame 130. The glue roller assembly 1340 is adjusted by the second adjusting mechanism 1341 to adjust the gap between the output end of the glue roller assembly 1340 and the roller body 1323. A die assembly 1342 is also provided on one side of the first back roller 135. The output end of the die assembly 1342 can be close to or far from the electrode to perform extrusion coating on the first surface. This is prior art and will not be described in detail.

[0055] See Figures 4 to 5 The second head 17 includes a second frame 170, a second inlet roller 171, a second gravure coating device 172, a second lifting roller, a second extrusion coating device 174, a second back roller 175, and a second outlet roller (not shown in the figure).

[0056] A second guide roller 171 is provided on one side of the second frame 170. Along the conveying direction, a second gravure coating device 172 and a second extrusion coating device 174 are provided on the second frame 170. The second gravure coating device 172 and the second extrusion coating device 174 are at different heights. Preferably, the second extrusion coating device 174 is higher than the second gravure coating device 172.

[0057] Based on the above description, since the first head 13 has two tape-threading methods for coating the first surface, correspondingly, when coating the second surface, according to these two tape-threading methods, a third tape path c and a fourth tape path d are formed in the second head 17, specifically as follows:

[0058] In the first threading method, the electrode sheet passes through the second introductory roller 171, the second gravure coating equipment 172, the second back roller 175, and the second outtroductory roller to form the third sheet path c; wherein, the second gravure coating equipment 172 is the same as the first gravure coating equipment, which is existing technology and will not be described in detail.

[0059] In the second threading method, the electrode sheet passes through the second inlet roller 171, the second lifting roller 173, the second extrusion coating device 174, the second back roller 175, and the second outlet roller to form the fourth sheet path d; wherein, the second extrusion coating device 174 is the same as the first extrusion coating device and is existing technology, so it will not be described again.

[0060] It is worth mentioning that, depending on the conveying position and direction of the electrode sheet, the first frame 130 and the second frame 170 are also equipped with several turning rollers (not marked in the figure) and tensioning rollers (not marked in the figure) for reversing and tensioning the electrode sheet.

[0061] In addition, to ensure the accuracy of the entire coating process, CCD inspection mechanisms will be set up at the corresponding locations. CCD inspection mechanisms are visual inspection technologies, which are existing technologies and will not be elaborated further.

[0062] This integrated extrusion and gravure coating machine is used to achieve coating thicknesses using different belt threading methods, as follows:

[0063] When gravure coating is used, the first threading method is adopted. Specifically, along the conveying direction, the electrode sheet is unwound by the unwinding mechanism 11, measured by the first surface density meter 12, passes through the first sheet path a, and is coated on the first surface by the first gravure coating equipment. The first surface enters the lower drying oven 14 for drying.

[0064] Then, pulled by the first traction mechanism 15, after being measured by the two-sided density meter, it passes through the third plate path c, and the second gravure coating equipment 172 performs coating operation on the second side. Pulled by the climbing mechanism 21, the second side enters the upper drying oven 20 for drying. Pulled by the second traction mechanism 19, after being measured by the third-sided density meter 18, it is wound up to the winding mechanism 10.

[0065] When extrusion coating is used, the second threading method is adopted. Along the conveying direction, the electrode sheet is unwound by the unwinding mechanism 11, measured by the first surface density meter 12, passes through the second sheet path b, and is coated on the first surface by the first extrusion coating equipment. The first surface enters the lower drying oven 14 for drying.

[0066] Then, pulled by the first traction mechanism 15, after being measured by the two-sided density meter, it passes through the fourth sheet path d, and the second extrusion coating equipment 174 performs coating operation on the second side. Pulled by the climbing mechanism 21, the second side enters the upper drying oven 20 for drying. Pulled by the second traction mechanism 19, after being measured by the third-sided density meter 18, it is wound up to the winding mechanism 10.

[0067] This embodiment first integrates two different coating devices within the die head, combining the advantages of both. By using different conveyor belt methods, different coating methods can be met, thereby ensuring coating of electrode sheets of different thicknesses. The entire extrusion and gravure coating integrated machine has a high degree of integration, a compact structure, and high applicability.

[0068] Based on this, the two coating paths are separated from each other by the reasonable setting of the lifting rollers, so that they do not interfere with each other. Furthermore, the two coating equipment share the inlet roller, back roller, and outlet roller, which makes the structural layout reasonable, reduces idle space and waste, and has strong applicability.

[0069] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. An integrated extrusion and gravure coating machine, characterized in that, It includes a fuselage, a first nose (13) and a second nose (17); the fuselage is divided into at least two layers, with the first nose (13) and the second nose (17) located on opposite sides of the same layer of the fuselage; The first head (13) and the second head (17) both include corresponding lifting rollers, gravure coating equipment, extrusion coating equipment and back rollers. Lifting rollers are set between the gravure coating equipment and the extrusion coating equipment. The heights of the lifting rollers, the output end of the extrusion coating equipment and the output end of the gravure coating equipment are different.

2. The integrated extrusion and gravure coating machine according to claim 1, characterized in that, The first head (13) and the second head (17) also include a frame, an inlet roller and an outlet roller. An inlet roller and an outlet roller are provided on one side of the frame, with the outlet roller located above the inlet roller.

3. The integrated extrusion and gravure coating machine according to claim 2, characterized in that, A gravure coating device is installed on the frame. The gravure coating device includes a gravure trough (1320), a gravure roller assembly (1322), and a pressure roller body (1323). The gravure trough (1320) is installed on the frame, and the gravure roller assembly (1322) is installed inside the gravure trough (1320). The pressure roller body (1323) is installed directly above the output end of the gravure roller assembly (1322).

4. The extrusion and gravure coating integrated machine according to claim 2, characterized in that, The gravure coating equipment also includes a first adjustment component (1324). The first adjustment component (1324) is installed on the frame. The pressure roller body (1323) is driven by the first adjustment component (1324) to control the gap between the pressure roller body (1323) and the output end of the gravure roller assembly (1322).

5. The integrated extrusion and gravure coating machine according to claim 2, characterized in that, The gravure coating equipment also includes a doctor blade assembly (1325), which is mounted on a frame located on the side of the gravure roller assembly (1322).

6. The extrusion and gravure coating integrated machine according to claim 2, characterized in that, The frame is equipped with an extrusion coating device, which includes a glue roller assembly (1340) and a die assembly (1342). The frame is equipped with a glue roller assembly (1340), and a die assembly (1342) is also provided on one side of the first back roller (135).

7. The extrusion and gravure coating integrated machine according to claim 6, characterized in that, The extrusion coating apparatus also includes a second adjustment mechanism (1341), wherein the glue roller assembly (1340) is configured to adjust the gap between the output end of the glue roller assembly (1340) and the roller body (1323).

8. The integrated extrusion and gravure coating machine according to claim 2, characterized in that, The first head (13) and the second head (17) also include steering rollers, which are arranged along the conveying path on the frame.

9. The extrusion and gravure coating integrated machine according to claim 2, characterized in that, The first head (13) and the second head (17) also include tension rollers, which are installed on the frame along the conveying path.

10. The extrusion and gravure coating integrated machine according to claim 2, characterized in that, It also includes a winding mechanism (10), an unwinding mechanism (11), a first surface density meter (12), a first machine head (13), a lower drying oven (14), a first traction mechanism (15), a second surface density meter (16), and a second machine head (17) located on the lower layer of the machine body; It also includes a third surface density meter (18), a second traction mechanism (19), and an upper drying oven (20) installed on the upper part of the machine body; A ramp mechanism is installed between the upper and lower levels (21).

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