Stirring part, slurry supply device and coating system

Abstract

The embodiment of the utility model discloses a stirring part, a slurry supply device and a coating system.The stirring part comprises a connecting shaft and a stirring part, the stirring part is arranged at the end of the connecting shaft, the stirring part comprises a stirring contact surface, and a plurality of hollowed-out holes are formed in the stirring contact surface to form a mesh structure; and the mesh structure cuts the slurry based on the rotation of the connecting shaft. In the scheme of the embodiment of the invention, the mesh structure is formed on the stirring piece, so that the slurry can be cut through the mesh structure when the stirring piece rotates and stirs based on the connecting shaft, thereby enhancing the stirring effect on the slurry, avoiding the formation of large particles caused by agglomeration of the slurry due to long-time storage, and improving the stirring efficiency of the slurry. And the coating quality is further influenced.

Description

Technical Field

[0001] The present application relates to the technical field of battery membrane manufacturing, and in particular to a stirring member, a slurry supply device and a coating system. Background Art

[0002] During the coating operation, the slurry is output through the lip of the extrusion head for coating. During the long period of shutdown to restart, the slurry will agglomerate in the inner cavity of the extrusion head to form large particles. When the internal pressure becomes larger, the large particles will be squeezed to the lip, resulting in scratches, slurry separation, uneven coating and even electrode scraping during the coating process, which will affect the coating quality. Utility Model Content

[0003] In view of the above problems, the present application provides a stirring member, a slurry supply device and a coating system, which can effectively stir the slurry, thereby facilitating improving the coating quality.

[0004] The technical means adopted by this application to solve the above technical problems are:

[0005] In one aspect, an embodiment of the present application provides a stirring element, comprising:

[0006] Connecting shaft;

[0007] A stirring portion is arranged at the end of the connecting shaft, and the stirring portion includes a stirring contact surface, and a plurality of hollow holes are arranged on the stirring contact surface to form a mesh structure, and the mesh structure forms cutting of the slurry based on the rotation of the connecting shaft.

[0008] In the embodiment scheme of the present application, the mesh structure formed on the stirring element allows the stirring element to cut the slurry through the mesh structure when it rotates based on the connecting shaft, thereby enhancing the stirring effect on the slurry and avoiding the formation of large particles due to long-term agglomeration of the slurry, which in turn affects the coating quality.

[0009] In some embodiments, the mesh structure includes a plurality of first cutting plates extending along a first direction, and the plurality of first cutting plates are arranged parallel to each other;

[0010] The first direction is consistent with the axial direction of the connecting shaft;

[0011] The cross-section of each of the first cutting plates is arc-shaped.

[0012] In the embodiment of the present application, by setting the cross-sectional shape of the first cutting plate to be in an arc shape, the cutting-type stirring effect on the slurry can be further improved.

[0013] On the other hand, an embodiment of the present application provides a slurry supply device, including an extrusion head, a slurry storage chamber is provided in the extrusion head, and a stirring element as described above is provided in the slurry storage chamber.

[0014] In the embodiment of the present application, the stirring element is arranged in the slurry storage chamber of the extrusion head, so that during the rotation and stirring process, the stirring element can perform a cutting-type stirring operation on the slurry in the slurry storage chamber through the mesh structure to avoid agglomeration of the slurry to form large particles.

[0015] In some embodiments, the slurry storage chamber includes an end fan-shaped area, the stirring member is arranged corresponding to the end fan-shaped area, and the shape of one side surface of the stirring member is adapted to the shape of the end fan-shaped area.

[0016] In the embodiment of the present application, by designing the shape of the stirring element, it is possible to improve the fit between the stirring element and the end fan-shaped area, thereby improving the stirring effect.

[0017] In some embodiments, the projection shape of the slurry storage cavity is elliptical, and the stirring members are respectively disposed at both ends of the slurry storage cavity.

[0018] In the embodiment of the present application, the number of the stirring elements can be configured based on the design shape of the slurry storage chamber, so as to improve the stirring effect of the stirring elements on the slurry in the slurry storage chamber.

[0019] In some embodiments, the stirring member includes a first stirring member and a second stirring member;

[0020] The connecting shafts of the first stirring member and the second stirring member are arranged on the same axis and extend outwards and are arranged outside the extrusion head respectively;

[0021] The stirring parts of the first stirring member and the second stirring member are arranged in the slurry storage chamber, and the two stirring parts are connected to each other so as to be relatively rotatable.

[0022] In the embodiment of the present application, by forming a relatively rotatable connection relationship between the two stirring parts, the first stirring member and the second stirring member can be easily integrated, thereby increasing the stirring range of the stirring member in the slurry storage chamber.

[0023] In some embodiments, a connecting sleeve is provided on the first stirring member, and a socket pin is provided on the second stirring member, and the socket pin is plug-connected to the connecting sleeve.

[0024] In the embodiment of the present application, the plug-in connection between the sleeve pin and the connecting sleeve can facilitate the relatively rotatable connection between the first stirring member and the second stirring member.

[0025] In some embodiments, an ultrasonic generator is connected to the connecting shaft of the stirring member.

[0026] In the embodiment of the present application, the ultrasonic generator is provided to output ultrasonic waves to the slurry in the slurry storage chamber, so that the particles in the slurry can be in a state of high-frequency vibration, thereby extending the time required for slurry agglomeration.

[0027] In some embodiments, the extrusion head includes an upper die head and a lower die head, a lip is formed between the upper die head and the lower die head, and the lip is connected to the slurry storage cavity;

[0028] The extrusion head is provided with an adjusting mechanism for adjusting the lip opening.

[0029] In the embodiment of the present application, the adjustment mechanism is provided to facilitate adjustment of the opening of the lip, thereby controlling the output flow rate of the slurry.

[0030] In some embodiments, a plurality of pads are disposed in the lip, the pads are spaced apart from each other, and one end of the pad extends to the opening of the lip.

[0031] In the embodiment of the present application, the spacer block is provided to block the slurry output from the lip, thereby facilitating the zebra coating process.

[0032] In another aspect, the embodiment of the present application further provides a coating system, in which a stirring element as described above is arranged;

[0033] Or, a slurry supply device as described above is arranged therein.

[0034] In the embodiment of the present application, by applying the stirring member or the slurry supply device as described above in the coating system, the output quality of the slurry can be improved, thereby improving the consistency of the coating quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0036] Figure 1This is a schematic diagram of the front view structure of the stirring element of some embodiments of the present application.

[0037] Figure 2 This is a schematic diagram of the cross-sectional structure of a stirring element according to some embodiments of the present application.

[0038] Figure 3 This is a schematic diagram of the three-dimensional structure of the extrusion head of some embodiments of the present application.

[0039] Figure 4 This is a schematic diagram of the application of a stirring element in an extrusion head according to some embodiments of the present application.

[0040] Figure 5 This is a schematic diagram of the movement of the stirring member in the extrusion head according to some embodiments of the present application.

[0041] Figure 6 This is a schematic diagram of the connection of the stirring member in some embodiments of the present application.

[0042] Figure 7 This is a schematic diagram of the connection of the stirring member in some embodiments of the present application.

[0043] Figure 8 This is a schematic diagram of the application of the extrusion head of some embodiments of the present application.

[0044] Some of the reference numerals in the specific implementation manner are as follows:

[0045] 1- diaphragm;

[0046] 2-extrusion head, 201-upper die head, 202-lower die head, 21-lip, 22-slurry storage chamber, 221-end fan-shaped area, 23-adjusting knob, 24-pad;

[0047] 3-Roller;

[0048] 4-stirring member, 401-first stirring member, 402-second stirring member, 41-connecting shaft, 42-stirring portion, 421-stirring contact surface, 422-hollow hole, 423-first cutting plate, 424-second cutting plate, 43-connecting sleeve, 44-sleeve pin. DETAILED DESCRIPTION

[0049] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0051] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0052] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0053] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0054] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0055] At present, in the process of making the battery core, it is necessary to coat the diaphragm 1 with slurry, for example, the slurry is extruded and output by the extrusion head 2. At this time, the diaphragm 1 passes over the surface of the roller 3, and the lip 21 of the extrusion head 2 is set toward the diaphragm 1, so that the extruded slurry is coated on the diaphragm 1. However, in the process of stopping and starting the equipment, the slurry will be stored in the extrusion head 2 for a period of time, so that the slurry will agglomerate and form large particles; when the coating operation is repeated again, the pressure in the extrusion head 2 changes, and the large particles will be output from the lip and act on the diaphragm 1, resulting in uneven output of the slurry, scratches on the diaphragm by large particles, etc., which reduces the coating quality.

[0056] In response to the above technical problems, the present embodiment mainly provides a stirring element, a slurry supply device and a coating system, which can effectively stir the slurry, reduce the frequency of formation of large particles in the slurry, and even prevent the slurry from agglomerating and forming large particles after being left for a long time, thereby reducing the impact of the presence of large particles on the coating quality during the coating process, thereby facilitating improving the coating quality.

[0057] like Figure 1-8 As shown in , a stirring member 4 provided according to some embodiments of the present application includes a connecting shaft 41 and a stirring portion 42; wherein the connecting shaft 41 can be used to realize the installation setting of the entire stirring member 4, and through the rotational movement of the connecting shaft 41, power is provided to the stirring portion 42 to form a stirring operation.

[0058] In some embodiments, Figure 1 As shown, the stirring portion 42 is connected to one end of the connecting shaft 41; at this time, the stirring portion 42 and the connecting shaft 41 can be connected by a detachable installation method or an integrated structural molding method, such as casting.

[0059] In some embodiments, the stirring portion 42 can be configured as a plate-like structure. In this case, the two large side surfaces of the plate-like structure serve as the stirring contact surfaces 421 of the stirring portion 42. During the reciprocating rotation of the connecting shaft 41, the two stirring contact surfaces 421 serve as the main contact surfaces to form contact with the slurry, and then stirring is formed.

[0060] As one application example, in this embodiment, a plurality of hollow holes 422 are provided on the stirring contact surface 421, so that a mesh structure is formed on the stirring contact surface 421 by providing the plurality of hollow holes 422, such as Figure 1 As shown, when the connecting shaft 41 is reciprocating, the mesh structure can cut the slurry during the stirring process.

[0061] In some embodiments, the stirring portion 42 may also be in the form of an integrally formed mesh structure.

[0062] By forming the mesh structure on the stirring member 4, the stirring member 4 can cut the slurry through the mesh structure when it rotates based on the connecting shaft 41, thereby enhancing the stirring effect of the slurry and avoiding the agglomeration of the slurry after being left for a long time, which leads to the formation of large particles and subsequently affects the coating quality.

[0063] As one application example, the mesh structure includes a plurality of first cutting plates 423 and a plurality of second cutting plates 424; wherein, the plurality of first cutting plates 423 are arranged parallel to each other, and the plurality of second cutting plates 424 are arranged parallel to each other, and the first cutting plates 423 and the second cutting plates 424 intersect at an angle, thereby forming a mesh structure.

[0064] In some embodiments, the mesh shape in the mesh structure can be set to a polygonal form, such as a rhombus or a rectangle.

[0065] In some embodiments, the first cutting plate 423 is extended along a first direction, and the second cutting plate 424 is extended along a second direction; when the mesh shape in the mesh structure is a rectangle, the first direction is consistent with the axial direction of the connecting shaft 41, and can be set to be horizontal during installation and application; the second direction is set to be vertical, such as Figure 1 shown.

[0066] In some embodiments, each of the first cutting board 423 and the second cutting board 424 can be configured as a straight plate.

[0067] In some embodiments, each of the first cutting plates 423 may also be configured as an arc-shaped plate, so that the cross-sectional shape of the first cutting plate 423 is an arc-shaped, such as Figure 2 shown.

[0068] In some embodiments, the curvature of the first cutting plate 423 can be set to be consistent with the curvature of the arc formed when it rotates, so as to reduce the cutting resistance to the slurry during stirring.

[0069] In some embodiments, the curvature of the first cutting plate 423 can be set to be smaller than the curvature of the arc formed when it rotates, so as to strike a balance between reducing cutting resistance and increasing the collision area between the first cutting plate 423 and the slurry during stirring, thereby improving the tumbling effect on the slurry.

[0070] In some embodiments, along the second direction, the spacing distance between the two first cutting plates 423 can be set to decrease sequentially or increase sequentially; for example, the spacing distance between the two first cutting plates 423 close to the connecting axis 41 is greater than the spacing distance between the two first cutting plates 423 away from the connecting axis 41.

[0071] By setting the cross-sectional shape of the first cutting plate 423 to be in an arc shape, the trajectory passed by and formed by the first cutting plate 423 during the rotation of the connecting shaft 41 can be closer to the arc formed when it rotates, thereby facilitating reducing the cutting resistance of the first cutting plate 423 to the slurry during stirring, and thereby improving the cutting-type stirring effect on the slurry.

[0072] On the other hand, an embodiment of the present application provides a slurry supply device, which includes an extrusion head 2 and a stirring member 4 as described above.

[0073] In some embodiments, a slurry storage chamber 22 is provided in the extrusion head 2, and the stirring member 4 is installed in the slurry storage chamber 22; for example, the stirring portion 42 is in the slurry storage chamber 22, so as to facilitate cutting and stirring of the slurry in the slurry storage chamber 22; the connecting shaft 41 is penetrated on the side wall of the extrusion head 2, so as to facilitate transmission connection with the driving mechanism, such as Figure 3 , 4 , 6, and 7.

[0074] In some embodiments, the connecting shaft 41 is connected to a driving motor or a rotating cylinder after installation, so that the rotational movement of the connecting shaft 41 is controlled by the driving motor or the rotating cylinder.

[0075] By arranging the stirring member 4 in the slurry storage chamber 22 of the extrusion head 2, the stirring member 4 can perform a cutting-type stirring operation on the slurry in the slurry storage chamber 22 through the mesh structure during the rotation and stirring process, so as to avoid agglomeration between the slurries to form large particles, thereby facilitating improving the uniformity of the slurry output by the slurry supply device.

[0076] As one application example, based on the different designs of the internal structure of the extrusion head 2, an end fan-shaped area 221 is formed in the slurry storage chamber 22, such as Figure 4 , 6, 7; in traditional applications, the state of the slurry in these end sector areas 221 is more difficult to intervene, and is a frequent area of ​​large particles. In this embodiment, the stirring member 4 is arranged corresponding to the end sector area 221, and the shape of one side of the stirring member 4 is adapted to the shape of the end sector area 221.

[0077] By designing the shape of the stirring member 4 , the fit between the stirring member 4 and the end sector area 221 can be improved, thereby improving the stirring effect.

[0078] As one application example, the extrusion head 2 includes an upper die head 201 and a lower die head 202 , the upper die head 201 and the lower die head 202 overlap each other to form the slurry storage cavity 22 , and a lip 21 is formed at the overlapping gap between the upper die head 201 and the lower die head 202 .

[0079] In some embodiments, the slurry storage chamber 22 is disposed on the lower die head 202. In this case, the projection shape of the slurry storage chamber 22 is elliptical, and the lateral cross-sectional shape of the slurry storage chamber 22 is semicircular. Figure 5 As shown; the rotation amplitude of the stirring member 4 is corresponding to 180°, so that the movement trajectory of the outer side surface of the stirring member 4 is adapted to the cross-sectional shape of the slurry storage chamber 22.

[0080] In some embodiments, the stirring members 4 are respectively provided at both ends of the slurry storage chamber 22, and the rotational movements between the two stirring members 4 are independent of each other, thereby allowing the stirring members 4 at both ends to perform stirring actions with different stirring amplitudes. For example, the stirring member 4 at one end starts from the 0° position, and the stirring member 4 at the other end starts from the 180° position, thereby realizing staggered stirring actions. In this operating mode, the slurries at both ends of the slurry storage chamber 22 are in different stirring states, and the mixing and stirring effect will be better.

[0081] By configuring the number and operation mode of the stirring elements 4 based on the design shape of the slurry storage chamber 22 , the stirring effect of the stirring elements 4 on the slurry in the slurry storage chamber 22 can be improved.

[0082] As one application example, the stirring member 4 includes a first stirring member 401 and a second stirring member 402; wherein the connecting shafts 41 of the first stirring member 401 and the second stirring member 4002 are arranged on the same axis, and are respectively extended outwardly and arranged outside the extrusion head 2, so as to facilitate transmission connection with the driving mechanism; the stirring parts 42 of the first stirring member 401 and the second stirring member 402 are arranged in the slurry storage chamber 22, and a relatively rotatable connection is formed between the two stirring parts 42. At this time, reference can be made to Figure 6 , 7 shown.

[0083] By forming a relatively rotatable connection between the two stirring parts 42 , the first stirring member 401 and the second stirring member 402 can be easily integrated, so that the stirring range of the stirring member 4 can cover a larger area of ​​the internal space of the slurry storage chamber 22 .

[0084] As an example of one application, Figure 6 , 7 As shown, a connecting sleeve 43 is provided on the first stirring member 401 , and a sleeve pin 44 is provided on the second stirring member 402 . The sleeve pin 44 is plug-connected to the connecting sleeve 43 .

[0085] In some embodiments, a wear-resistant pad or a micro bearing may be sleeved between the sleeve pin 44 and the connecting sleeve 43 to reduce the wear caused by the relative rotation between the first stirring member 401 and the second stirring member 402 .

[0086] In some embodiments, the sleeve pin 44 is protrudingly disposed on the second stirring member 402; the connecting sleeve 43 can be protrudingly disposed on the first stirring member 401, such as Figure 6 It is also possible to make the outer side surface of the connecting sleeve 43 flush with the outer side surface of the first stirring member 401, as shown in FIG. Figure 7 shown.

[0087] The plug-in connection between the sleeve pin 44 and the connecting sleeve 43 can facilitate the relatively rotatable connection between the first stirring member 401 and the second stirring member 402, and the installation and use can be simpler and more convenient.

[0088] As an application example, an ultrasonic generator is further provided corresponding to the stirring member 4 , and the ultrasonic generator is connected to one end of the connecting shaft 41 extending toward the outside.

[0089] By means of the ultrasonic generator, ultrasonic waves can be output to the slurry in the slurry storage chamber 22, so that the particles in the slurry can be in a state of high-frequency vibration, thereby prolonging the time required for slurry agglomeration or avoiding agglomeration between slurries.

[0090] As one application example, the lip 21 is communicated with the slurry storage chamber 22 , and an adjusting mechanism for adjusting the opening of the lip 21 is provided on the extrusion head 2 .

[0091] In some embodiments, a plurality of adjusting knobs 23 are provided on the upper die head 201 along the length direction of the lip 21 , and the adjusting knobs 23 are used to adjust the state of the throttle strip of the lip.

[0092] By providing the regulating mechanism, it is possible to easily adjust the opening of the lip 21, thereby controlling the output flow of the slurry.

[0093] As an application example, a plurality of pads 24 are disposed in the lip 21 . The pads 24 are spaced apart along the length direction of the lip 21 , and one end of the pad 24 extends to the opening of the lip 21 .

[0094] By setting the pad 24, it is convenient to block the slurry output from the lip 21, so as to form mutually spaced slurry coating areas and tab areas on the membrane 1 during the coating operation, thereby facilitating the zebra coating process.

[0095] On the other hand, the embodiment of the present application also provides a coating system, in which the stirring element 4 as described above is provided; or, the slurry supply device as described above is provided in the coating system.

[0096] By applying the stirring member 4 or the slurry supply device as described above in the coating system, the output quality of the slurry can be improved, thereby improving the consistency of the coating quality.

[0097] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application 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 replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A stirring element, characterized in that: include: Connecting shaft; A stirring portion is arranged at the end of the connecting shaft, and the stirring portion includes a stirring contact surface, and a plurality of hollow holes are arranged on the stirring contact surface to form a mesh structure, and the mesh structure forms cutting of the slurry based on the rotation of the connecting shaft.

2. The stirring element according to claim 1, characterized in that: The mesh structure includes a plurality of first cutting plates extending along a first direction, and the plurality of first cutting plates are arranged parallel to each other; The first direction is consistent with the axial direction of the connecting shaft; The cross-section of each of the first cutting plates is arc-shaped.

3. A slurry supply device, characterized in that: It comprises an extrusion head, wherein a slurry storage chamber is arranged in the extrusion head, and a stirring element as described in claim 1 or 2 is arranged in the slurry storage chamber.

4. The slurry supply device according to claim 3, characterized in that: The slurry storage chamber includes an end fan-shaped area, the stirring member is arranged corresponding to the end fan-shaped area, and the shape of one side surface of the stirring member is adapted to the shape of the end fan-shaped area.

5. The slurry supply device according to claim 4, characterized in that: The projection shape of the slurry storage cavity is elliptical, and the stirring members are respectively arranged at both ends of the slurry storage cavity.

6. The slurry supply device according to claim 5, characterized in that: The stirring member comprises a first stirring member and a second stirring member; The connecting shafts of the first stirring member and the second stirring member are arranged on the same axis and extend outwards and are arranged outside the extrusion head respectively; The stirring parts of the first stirring member and the second stirring member are arranged in the slurry storage chamber, and the two stirring parts are connected to each other so as to be relatively rotatable.

7. The slurry supply device according to claim 6, characterized in that: The first stirring member is provided with a connecting sleeve, and the second stirring member is provided with a sleeve pin, and the sleeve pin is plug-connected with the connecting sleeve.

8. The slurry supply device according to any one of claims 3 to 7, characterized in that: The connecting shaft of the stirring member is connected with an ultrasonic generator.

9. The slurry supply device according to claim 8, characterized in that: The extrusion head comprises an upper die head and a lower die head, a lip is formed between the upper die head and the lower die head, and the lip is communicated with the slurry storage cavity; The extrusion head is provided with an adjusting mechanism for adjusting the lip opening.

10. The slurry supply device according to claim 9, characterized in that: A plurality of pads are arranged in the lip, the pads are arranged at intervals, and one end of the pad extends to the opening of the lip.

11. A coating system, characterized in that: A stirring member as described in claim 1 or 2 is arranged therein; Or, a slurry supply device as described in any one of claims 3 to 10 is arranged therein.

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