Coating apparatus
By setting shims in the adjusting groove and the clearance port in the coating equipment, the flow rate and velocity of the slurry can be adjusted, which solves the problems of coating bulging and abnormal thinning high points in the edge area of the coating equipment and improves the coating quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SUNWODA MOBILITY ENERGY TECHNOLOGY CO LTD
- Filing Date
- 2025-04-15
- Publication Date
- 2026-06-16
AI Technical Summary
In the existing coating equipment, coating bulges or thinning high points are prone to occur in the edge areas during the coating process, which affects the coating quality.
A gasket is installed between the upper and lower die heads of the coating equipment. The gasket includes a connecting part and multiple flow guides. The flow guides are provided with adjustment grooves and clearance openings. The flow rate and velocity of the slurry are adjusted by moving the movable block in the adjustment groove to reduce the accumulation of slurry at the edges.
It effectively reduces the slurry flow rate and velocity in the coating edge area, reduces the risk of coating blistering and thinning high point abnormalities, and improves coating quality.
Smart Images
Figure CN224358733U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the technical field of power coating equipment, specifically relating to a coating device. Background Technology
[0002] Lithium-ion battery coating is a process in which a suspension of positive and negative electrode active materials is uniformly coated onto a current collector aluminum / copper foil using coating equipment, and then dried in an oven to form a film.
[0003] In the prior art, by installing a gasket between the upper and lower dies, the slurry that is extruded and coated is uniformly coated onto the copper and aluminum foil after the flow direction and flow rate are changed by the gasket, so as to meet the specifications required by the process.
[0004] However, during the coating process, coating bulges or thinning at high points may occur in the edge areas, affecting the coating quality. Utility Model Content
[0005] The purpose of this application is to provide a coating apparatus that can solve at least some of the above-mentioned problems.
[0006] To solve the above-mentioned technical problems, this application is implemented as follows:
[0007] In a first aspect, embodiments of this application provide a coating apparatus, including an upper die head and a lower die head disposed opposite to each other, and a gasket disposed between the upper die head and the lower die head. A movable block is provided between the upper die head and the gasket, and the movable block is disposed on the upper die head and can move toward or away from the gasket.
[0008] The gasket includes a connecting portion and multiple flow guiding portions, the multiple flow guiding portions being spaced apart on the same side of the connecting portion, and a slurry diversion area being formed between adjacent flow guiding portions;
[0009] Multiple flow guides have adjustment grooves on one side surface facing the upper die head. Each adjustment groove is connected to the adjacent slurry flow area and is used to accommodate the movable block.
[0010] In this embodiment, the gasket is sheet-shaped and can be clamped between the upper and lower dies of the coating machine. The gasket includes a connecting part and a guide part, with the guide part connected to the connecting part. At least two guide parts are provided, and a slurry flow area is defined between adjacent guide parts. The guide part is provided with an adjustment groove, which communicates with the adjacent slurry flow area. When the extrusion gasket is clamped by the upper and lower dies, the adjacent guide parts can define a cavity for slurry flow with the upper and lower dies. It is understood that, due to the provision of the adjustment groove, the flow rate and velocity of the edge slurry can be effectively reduced by adjusting the movable block in the adjustment groove, which helps to produce a certain thinning at the coating edge. This reduces the accumulation of slurry on the side surface of the guide part, reduces the risk of coating bulges or abnormal thinning high points in the edge area during the coating process, and improves the coating quality.
[0011] Furthermore, it can be understood that the gasket is located between the upper and lower dies of the coating machine, with the adjustment groove on the surface of the gasket facing the upper die. The adjustment groove can also accommodate a movable block, which can move within the adjustment groove to approach or move away from the bottom of the groove. In production applications, the position of the movable block in the adjustment groove can be adjusted according to the actual situation. For example, the movable block can be moved closer to the bottom of the adjustment groove, thus reducing the distance between the movable block and the lower die, which can further achieve the thinning of the slurry. That is, by adjusting the position of the movable block in the adjustment groove to approach or move away from the bottom of the adjustment groove, the thickness of the slurry can be adjusted to produce a good thinning effect, thereby ensuring that the width of the thinned area meets the design requirements and improving the coating quality.
[0012] Optionally, in an embodiment of this application, the guide section has a guide side near the slurry guide area, and the regulating groove has a first clearance opening through the guide section at the bottom of the groove near the guide side.
[0013] Optionally, in the embodiments of this application, the first clearance openings of the guide portions on both sides of the same slurry diversion area are the same size;
[0014] The plurality of flow guides include end flow guides located at opposite ends of the connecting portion, and middle flow guides located between the end flow guides. Two adjacent middle flow guides are in the same slurry diversion area. The size of the first clearance opening of the middle flow guide is larger than the size of the first clearance opening of the end flow guide.
[0015] Optionally, in an embodiment of this application, the guide portion has a guide side near the slurry guide area, and the guide side is provided with a flow-blocking block protruding towards the slurry guide area.
[0016] Optionally, in an embodiment of this application, the flow guide includes a first surface on which the regulating groove is formed, and a second surface relative to the first surface, wherein the thickness of the flow blocking block is less than the thickness of the flow guide; and the flow blocking block is flush with the second surface.
[0017] Optionally, in an embodiment of this application, the flow guide includes a first surface on which the regulating groove is formed, the flow guide has a distal side away from the connecting portion, the flow guide has a flow guide side close to the slurry flow guide area, and the distal side and the flow guide side intersect at the side facing the first surface where a slurry flow guide port is formed.
[0018] Optionally, in this embodiment of the application, the length of the adjustment groove is L and the width is M; satisfying: 0mm < L ≤ 32mm, 0mm < M ≤ 16mm.
[0019] Optionally, in this embodiment of the application, the slurry guide port and the flow-blocking block are in contact.
[0020] Optionally, in the embodiments of this application, the connecting part, the flow guiding part, and the flow blocking block are integrally formed.
[0021] Optionally, in this embodiment of the application, the upper die head is provided with a mounting hole, the movable block is disposed in the mounting hole, and the movable block can move in the mounting hole toward or away from the gasket. Attached Figure Description
[0022] Figure 1 This is a schematic diagram of the gasket structure in an embodiment of this application;
[0023] Figure 2 This is a schematic diagram of the structure of the active block in an embodiment of this application;
[0024] Figure 3 This is a partially enlarged structural diagram of the gasket in an embodiment of this application;
[0025] Figure 4 This is a schematic diagram of the connection structure between the upper mold head and the movable block in this embodiment of the application.
[0026] Explanation of reference numerals in the attached figures:
[0027] 1. Gasket; 2. Upper die head; 3. Mounting hole; 10. Connecting part; 20. Flow guide part; 21. End flow guide part; 22. Middle flow guide part; 23. First surface; 30. Adjusting groove; 40. First clearance opening; 50. Slurry flow guide opening; 60. Flow blocking block; 70. Movable block; 80. Drainage side; 90. Distal side. Detailed Implementation
[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0029] The terms "first," "second," etc., used in the specification and claims of this application are used to distinguish similar objects and not to describe a specific order or sequence. It should be understood that such use of data can be interchanged where appropriate so that embodiments of this application can be implemented in orders other than those illustrated or described herein, and the objects distinguished by "first," "second," etc., are generally of the same class and the number of objects is not limited; for example, a first object can be one or more. Furthermore, in the specification and claims, "and / or" indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0030] The coating equipment provided in this application will be described in detail below with reference to the accompanying drawings, through specific embodiments and application scenarios.
[0031] See Figures 1 to 2 The embodiments of this application provide a coating device, including an upper die head 2 and a lower die head arranged opposite to each other, and a gasket 1 disposed between the upper die head 2 and the lower die head. A movable block 70 is provided between the upper die head 2 and the gasket 1. The movable block 70 is disposed on the upper die head 2 and can move towards or away from the gasket 1. The gasket 1 includes a connecting part 10 and a plurality of guide parts 20. The plurality of guide parts 20 are spaced apart on the same side of the connecting part 10, and a slurry guiding area is formed between adjacent guide parts 20. An adjustment groove 30 is opened on the side surface of the plurality of guide parts 20 facing the upper die head. Each adjustment groove 30 is connected to the slurry guiding area adjacent to it, and each adjustment groove 30 is used to accommodate the movable block 70.
[0032] In this embodiment, the gasket 1 is sheet-shaped and can be clamped between the upper die head 2 and the lower die head of the coating machine. A movable block is also provided between the upper die head 2 and the gasket 1. The gasket 1 includes a connecting part 10 and a guide part 20. The guide part 20 is connected to the connecting part 10. At least two guide parts 20 are provided. The adjacent guide parts 20 define a slurry flow area. An adjustment groove 30 is provided on the side of the guide part 20 facing the upper die head 2. The adjustment groove 30 communicates with the adjacent slurry flow area. When the extrusion gasket 1 is clamped by the upper die head 2 and the lower die head, the adjacent guide parts 20 can define a cavity for slurry flow with the upper die head 2 and the lower die head. It can be understood that, due to the provision of the adjustment groove 30, the flow rate and velocity of the edge slurry can be effectively reduced by adjusting the movable block 70 in the adjustment groove 30. This is beneficial for the coating edge to produce a certain thinning, reducing the accumulation of slurry on the side surface of the guide part 20, reducing the risk of coating bulges or abnormal thinning high points in the edge area during the coating process, and improving the coating quality.
[0033] Furthermore, it can be understood that the gasket 1 is located between the upper die head 2 and the lower die head of the coating machine. The adjustment groove on the surface of the gasket 1 faces the upper die head 2. The adjustment groove 30 can also be used to accommodate the movable block 70. The movable block 70 can move within the adjustment groove 30, moving closer to or further away from the bottom of the adjustment groove 30. For example, the movable block 70 is closer to the bottom of the adjustment groove 30. In this way, the distance between the movable block 70 and the lower die head is reduced, which can further achieve the thinning of the slurry. That is, by adjusting the position of the movable block 70 in the adjustment groove 30 closer to or further away from the bottom of the adjustment groove, the thickness of the slurry can be adjusted. In production applications, the position of the movable block 70 in the adjustment groove 30 can be adjusted according to the actual situation to produce a good thinning effect, thereby ensuring that the width of the thinned area meets the design requirements and improving the coating quality.
[0034] In one embodiment of this application, the guide section 20 has a guide side 80 near the slurry guide area, and the regulating groove 30 has a first clearance opening 40 through the guide section 20 at the bottom of the groove near the guide side 80.
[0035] It is understood that the guide section 20 has a guide side 80 near the slurry guide area. Specifically, along the length direction of the connecting section 10, the guide sections 20 at both ends of the connecting section 10 have one guide side 80, and the guide section 20 in the middle of the connecting section 10 has two guide sides 80. The regulating trough 30 has a first clearance opening 40 at the bottom of the trough near the guide side 80. The first clearance opening 40 is provided to provide a accommodating space for the slurry flowing to this location. Furthermore, in the extrusion coating process, the slurry can flow into the slurry guiding area. Some of the slurry flowing into the guiding section 20 will be blocked by the guiding section 20, but some slurry will continue to flow through the guiding section 20 to the first clearance port 40. The amount of slurry input in the guiding area with the first clearance port 40 is less than that in the guiding area without the first clearance port 40, which can produce a certain thinning effect. This reduces the accumulation of slurry on the side surface of the guiding section 20, thus preventing problems such as coating bulges or abnormal thinning high points in the edge area during the coating process, and improves the coating quality.
[0036] In one embodiment of this application, in the same slurry diversion area, the first clearance openings 40 of the diversion portions 20 on both sides are the same size; the plurality of diversion portions 20 include end diversion portions 21 located at opposite ends of the connecting portion 10, and middle diversion portions 22 located between the end diversion portions 21. Two adjacent middle diversion portions 22 are in the same slurry diversion area, and the size of the first clearance opening 40 of the middle diversion portion 22 is larger than the size of the first clearance opening 40 of the end diversion portion 21.
[0037] In this embodiment of the application, in the same slurry diversion area, the first clearance openings 40 of the guide portions 20 on both sides are the same size. It can be understood that when the slurry enters the slurry diversion area, and both guide portions 20 on both sides have first clearance openings 40, then some of the slurry will always flow to the first clearance openings 40 on both sides. By setting the size of the first clearance openings 40 of the guide portions 20 on both sides to be the same, the thinning degree of the slurry on both sides in the extrusion coating process can be made as similar as possible, thereby ensuring the uniformity of the coating thickness.
[0038] Furthermore, in one embodiment of this application, the guide portion 20 includes an end guide portion 21 and a middle guide portion 22. Along the length direction of the connecting portion 10, since the middle guide portion 22 has slurry drainage areas on both sides, while the end guide portion 21 has slurry drainage areas on only one side, in order to achieve a similar degree of thinning, at the position where the slurry input is greater, that is, at the position of the middle guide portion 22, the size of the first clearance opening 40 of the middle guide portion 22 is set to be larger than the first clearance opening 40 of the end guide portion 21, so that the degree of slurry thinning at each place is the same or similar, which has the beneficial effect of improving the coating quality.
[0039] Understandably, when slurry flows in a confined space, the slurry near the wall will experience frictional resistance from the wall, resulting in a relatively slow flow velocity. In the middle section, the slurry experiences less frictional resistance, thus resulting in a relatively higher flow velocity. Making the size of the first clearance opening 40 of the middle guide section 22 larger than the size of the first clearance opening 40 of the end guide section 21 helps to reduce the flow velocity on both sides of the slurry diversion zone between two adjacent middle guide sections 22, thereby improving the uniformity of the coating thickness formed in each slurry diversion zone.
[0040] In this embodiment of the application, the flow guiding part 20 has a flow guiding side 80 near the slurry flow guiding area, and the flow guiding side 80 is provided with a flow blocking block 60 protruding towards the slurry flow guiding area.
[0041] In this embodiment, the flow-restricting block 60 is used to further slow down the flow of slurry on the guide side 80, and also to guide the flow of slurry. Meanwhile, in the extrusion coating process, the slurry flows in the slurry guide area, and the slurry flow distance near the flow-restricting block 60 increases. Therefore, the amount of slurry input near the flow-restricting block 60 is less, resulting in a certain degree of thinning. This prevents thick edges from forming in the thinned area, which helps to ensure that the coating thickness in the thinned area meets the design requirements.
[0042] In one embodiment of this application, the flow guide 20 includes a first surface 23 with an adjustment groove 30 and a second surface relative to the first surface 23. The thickness of the flow blocking block 60 is less than the thickness of the flow guide 20; the flow blocking block 60 is flush with the second surface.
[0043] In this embodiment, along the thickness direction of the guide portion 20, the guide portion 20 has a first surface 23 and a second surface disposed opposite to each other. The thickness of the flow-blocking block 60 is less than the thickness of the guide portion 20, and the flow-blocking block 60 is flush with the second surface. That is, along the thickness direction of the guide portion 20, the first surface 23 and the flow-blocking block 60 have a height difference. The regulating groove 30 is formed on the first surface 23, and it is understood that the regulating groove 30 and the flow-blocking block 60 also have a height difference. In the extrusion coating process, when the slurry flows in the slurry guiding area, the flow-blocking block 60 and the regulating groove 30 can extend the flow distance of the slurry at different thicknesses, reduce the amount of slurry input, and produce a certain thinning effect through both methods. This can further reduce the risk of thick edges appearing in the thinned area, which is beneficial to ensuring that the coating thickness in the thinned area meets the design requirements.
[0044] It should also be noted that the adjustment groove 30 is located on the first surface 23, and the flow blocking block 60 is flush with the second surface, both of which can reduce the appearance of air bubbles in the thinned area after coating and ensure coating quality.
[0045] In this embodiment of the application, the flow guide 20 includes a first surface 23 with an adjustment groove 30, the flow guide 20 has a distal side 90 away from the connecting part 10, the flow guide 20 has a flow guide side 80 close to the slurry flow guide area, and the intersection of the distal side 90 and the flow guide side 80 is provided with a slurry flow guide port 50 on the side facing the first surface 23.
[0046] In this embodiment, the slurry guide port 50 is configured to increase the slurry flow distance at the intersection of the distal side 90 and the drainage side 80, further slowing down the slurry flow at the slurry guide port 50, and also providing some guidance for the slurry flow. In practical applications, the slurry entering the slurry drainage area passes sequentially through the slurry guide port 50, the flow blocking block 60, and the first clearance port 40. All three structural configurations reduce the slurry input, resulting in a certain degree of thinning. Furthermore, these three structural configurations further prevent thick edges from appearing in the thinned area, which helps ensure that the coating thickness in the thinned area meets design requirements.
[0047] In one embodiment of this application, the length of the adjustment groove 30 is L and the width is M; satisfying: 0mm < L ≤ 32mm, 0mm < M ≤ 15mm.
[0048] In this embodiment, the length of the adjusting groove 30 can be 1.7mm, 3mm, 8.5mm, 10.3mm, 16mm, 17mm, 18.5mm...30.7mm, 32mm, and the width of the adjusting groove 30 can be 6mm, 3mm, 8.5mm, 10.3mm, 10mm, 10.6mm...15mm. The above-mentioned dimensions of the adjusting groove 30 ensure the structural strength of the guide section 20 while preventing the guide section 20 from blocking too much slurry, thus preventing the thinning area from becoming too thin.
[0049] In one embodiment of this application, the slurry guide port 50 and the flow blocking block 60 are adjacent to each other.
[0050] In this embodiment of the application, the first clearance port 40 and the flow blocking block 60 are arranged adjacent to each other, which can reduce the obstruction of the slurry by other parts on the flow guiding side of the flow guiding part 20, and has the beneficial effect of optimizing the flow path of the slurry and making the flow of the slurry smoother.
[0051] In one embodiment of this application, the connecting part 10, the flow guiding part 20 and the flow blocking block 60 are integrally formed.
[0052] In this embodiment, the integral molding of the connecting part 10, the flow guiding part 20 and the flow limiting part can improve the integrity of the gasket 1 and make installation easier.
[0053] In one embodiment of this application, the upper mold head 2 is provided with a mounting hole 3, and the movable block 70 is disposed in the mounting hole 3. The movable block 70 can move in the mounting hole 3 towards the gasket 1 or away from the gasket 1.
[0054] In this embodiment, the mounting hole 3 is used to limit the movement of the movable block 70. The mounting hole 3 is opened in the upper die head 2 and is opened in the direction close to the gasket 1. When the movable block 70 is set in the mounting hole 3, the movable block 70 can move in the direction close to or away from the gasket 1 under the limitation of the mounting hole 3. In this way, the flow rate and velocity of the edge slurry can be reduced or increased according to the actual situation. When the flow rate and velocity of the edge slurry are reduced, it helps to produce a certain thinning at the coating edge, which has the beneficial effect of reducing the accumulation of slurry on the side surface of the guide part, reducing the risk of coating bulges or abnormal thinning high points in the edge area during the coating process, and improving the coating quality.
[0055] It should be noted that, in this document, 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.
[0056] The embodiments of this application have been described above with reference to the accompanying drawings. However, this application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.
Claims
1. A coating device, characterized in that, It includes an upper die head (2) and a lower die head arranged opposite to each other, and a gasket (1) disposed between the upper die head (2) and the lower die head. A movable block (70) is provided between the upper die head (2) and the gasket (1). The movable block (70) is disposed on the upper die head (2) and can move towards or away from the gasket (1). The gasket (1) includes a connecting part (10) and a plurality of flow guiding parts (20), the plurality of flow guiding parts (20) are spaced apart on the same side of the connecting part (10), and a slurry diversion area is formed between adjacent flow guiding parts (20); Multiple flow guides (20) have adjustment grooves (30) on one side surface facing the upper die head. Each adjustment groove (30) is connected to the adjacent slurry flow area. Each adjustment groove (30) is used to accommodate the movable block (70).
2. The coating equipment according to claim 1, characterized in that, The guide section (20) has a guide side (80) near the slurry guide area, and the regulating trough (30) has a first clearance opening (40) that passes through the guide section (20) at the bottom of the trough near the guide side (80).
3. The coating equipment according to claim 2, characterized in that, In the same slurry diversion area, the first clearance openings (40) of the diversion portions (20) on both sides are the same size; The plurality of flow guides (20) include end flow guides (21) located at opposite ends of the connecting part (10) and middle flow guides (22) located between the end flow guides. Two adjacent middle flow guides (22) are in the same slurry diversion area. The size of the first clearance opening (40) of the middle flow guide (22) is larger than the size of the first clearance opening (40) of the end flow guide (21).
4. The coating apparatus according to any one of claims 1 to 3, characterized in that, The guide section (20) has a guide side (80) near the slurry guide area, and the guide side (80) is provided with a flow blocking block (60) protruding towards the slurry guide area.
5. The coating equipment according to claim 4, characterized in that, The flow guide (20) includes a first surface (23) on which the regulating groove (30) is formed, and a second surface relative to the first surface (23), wherein the thickness of the flow block (60) is less than the thickness of the flow guide (20); The flow-blocking block (60) is flush with the second surface.
6. The coating equipment according to any one of claims 1 to 3 and 5, characterized in that, The guide section (20) includes a first surface (23) on which the regulating groove (30) is formed. The guide section (20) has a distal side (90) away from the connecting part (10). The guide section (20) has a guide side (80) close to the slurry guide area. The intersection of the distal side (90) and the guide side (80) is provided with a slurry guide port (50) on the side facing the first surface (23).
7. The coating equipment according to any one of claims 1 to 3 and 5, characterized in that, The length of the adjustment groove (30) is L and the width is M; satisfying: 0mm≤L≤32mm, 0mm≤M≤15mm.
8. The coating equipment according to claim 6, characterized in that, The slurry inlet (50) and the flow-blocking block (60) of the flow guide (20) are in contact.
9. The coating apparatus according to any one of claims 1 to 3, 5 and 8, characterized in that, The connecting part (10), the flow guiding part (20) and the flow blocking block (60) of the flow guiding part (20) are integrally formed.
10. The coating equipment according to claim 1, characterized in that, The upper die head (2) has a mounting hole (3), and the movable block (70) is located in the mounting hole (3). The movable block (70) can move in the mounting hole (3) towards the gasket (1) or away from the gasket (1).