Coating die head and coating device

Abstract

The utility model discloses a coating die head and a coating device, the coating die head is provided with a cavity for containing coating slurry, the coating die head further comprises a driving assembly, the driving assembly is arranged in the cavity, the two ends, extending in the first direction, of the driving assembly are fixed to the end walls of the cavity respectively, and the driving assembly comprises a power system; the scraping plate is arranged in the cavity and abuts against the bottom wall of the cavity, or a preset gap is formed between the scraping plate and the bottom wall of the cavity; the scraping plate is in sliding connection with the driving assembly, the power system drives the scraping plate to reciprocate in the first direction, and the first direction is perpendicular to the slurry coating direction of the coating die head. The driving assembly and the scraping plate are arranged in the cavity, and the driving assembly provides power for the scraping plate, so that the scraping plate reciprocates along the cavity in the first direction to clean the cavity. Therefore, according to the scheme, the coating die head can be cleaned without opening the cavity, so that time and labor intensity required by maintenance and cleaning are reduced.

Description

TECHNICAL FIELD

[0001] The present disclosure relates generally to the technical field of battery production. More specifically, the present disclosure relates to a coating die, and further the present disclosure relates to a coating device. BACKGROUND

[0002] Energy saving and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environmentally friendly advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] In the process of manufacturing batteries, extrusion coating technology is one of the core processes, which is known for its high precision coating capability. The coating die is a key component of this technology, which consists of two parts, forming a fine slit in the middle. This design ensures that the slurry can be uniformly extruded from the slit under precise pressure control and coated on the substrate.

[0004] The feed inlet on the commonly used coating die is usually located in the middle area, from which the slurry flows into the cavity and spreads to both sides. However, due to the principle of fluid dynamics, the flow rate of the slurry in the edge area will slow down, which may cause the slurry to accumulate in the corner. In addition, if the coating machine is not used for a long time or is stopped without timely cleaning, the slurry will accumulate inside the die, forming a deposit. This deposited slurry can seriously affect the uniformity of the coating during the coating process, which may cause appearance defects such as stripes, spots, etc., thereby reducing the overall appearance quality of the coated product. In addition, changes in coating thickness and uneven distribution can also have a negative impact on key performance such as energy density, cycle life, etc. of the battery. More critically, the unevenness of the coating can also affect the consistency of the battery cell, leading to increased performance differences between battery cells, ultimately affecting the overall performance of the entire battery pack.

[0005] To solve this problem, the coating die needs to be cleaned regularly after being used for a period of time. However, this cleaning process not only takes a long time, affecting production efficiency, but also causes waste of production materials due to the slurry removed.

[0006] Therefore, there is an urgent need to provide a coating die and a coating device to clean the die without opening the cavity, thereby improving the cleaning efficiency of the die. SUMMARY

[0007] To at least solve the technical problems mentioned above, the present disclosure provides a coating die and a coating device that can clean the die conveniently and efficiently.

[0008] In a first aspect, the present disclosure provides a coating die having a cavity for accommodating a coating slurry, the coating die further comprising: a driving assembly arranged in the cavity and fixed at two ends extending in a first direction on end walls of the cavity, wherein the driving assembly comprises a power system; a doctor blade arranged in the cavity and abutting against a bottom wall of the cavity or having a preset gap; the doctor blade is in sliding connection with the driving assembly, and the power system drives the doctor blade to reciprocate in the first direction, which is perpendicular to a slurry coating direction of the coating die.

[0009] In some embodiments, the driving assembly comprises a current-conducting magnetic shaft extending in the first direction and connected with an electric current, and a permanent magnet arranged on the doctor blade; the current-conducting magnetic shaft has a groove extending in the first direction, and the doctor blade has a protrusion fitting the groove, and the protrusion is provided with the permanent magnet, which is inserted into the groove through the protrusion, and can move under the action of a magnetic field generated by the current-conducting magnetic shaft after being electrified, to drive the doctor blade to move in the first direction on the current-conducting magnetic shaft, which is parallel to an axis of the current-conducting magnetic shaft.

[0010] In some embodiments, the groove has an iron sheet therein, and the iron sheet has coil windings arranged at intervals on a surface thereof, which can make the current-conducting magnetic shaft generate an alternating magnetic field after being electrified with alternating current, and in the first direction, the surface of the protrusion has at least two permanent magnets with opposite magnetic poles arranged side by side, which can move under the action of the alternating magnetic field, to drive the doctor blade to reciprocate in the first direction on the current-conducting magnetic shaft.

[0011] In some embodiments, the doctor blade is arranged in a ring shape, the outer contour of the doctor blade is adapted to the shape of the cavity, the doctor blade has a through hole with an inner contour adapted to the outer peripheral shape of the current-conducting magnetic shaft, and the doctor blade is sleeved on the current-conducting magnetic shaft through the through hole.

[0012] In some embodiments, the groove has a first limiting portion recessed on a side wall thereof, the protrusion is protruded towards the through hole, and the protruded end of the protrusion is provided with a second limiting portion, which is inserted into the first limiting portion, to limit the doctor blade in the groove.

[0013] In some embodiments, the first limiting part has two and is respectively arranged on the opposite side walls of the groove, one end of the two first limiting parts is connected with the side wall of the groove, the other end extends towards each other along a second direction, and the notch of the groove is formed between the two extending ends, wherein the second direction is perpendicular to the axis of the flow guide magnetic shaft; the protruding part protrudes towards the inside of the through hole and extends to form an extending section, the width of the extending section is smaller than the width of the notch of the groove, the second limiting part is arranged at the end of the extending section, and the permanent magnet is mounted on the surface of the second limiting part; the protruding part is limited in the groove by inserting the extending section into the notch and inserting the second limiting part into the first limiting part.

[0014] In some embodiments, the shape of the flow guide magnetic shaft can be any one of a spindle shape, a wedge shape, or a cylindrical shape.

[0015] In some embodiments, at least an installation groove adapted to the scraper is arranged on the inner surface of the end wall of any one of the cavities, and the installation groove is used to accommodate the scraper; and / or a fixing groove adapted to the end of the flow guide magnetic shaft is arranged on the inner surface of the two end walls of the cavities, and the fixing groove is used to fix the flow guide magnetic shaft.

[0016] In some embodiments, the driving assembly is a magnetic coupling type rodless cylinder, which includes an internal piston and an external slide, the scraper is fixedly connected with the slide, and the piston drives the slide and the scraper to move.

[0017] In a second aspect, the disclosure provides a coating device, which includes the above-mentioned coating die head, and further includes a master control system and a power controller connected with the master control system; after the master control system starts the die head circulation, the power controller outputs an alternating current signal to drive the scraper to move.

[0018] By using the coating die head provided above, the embodiments of the disclosure set the driving assembly and the scraper in the cavity, and when in use, the power system in the driving assembly provides power for the scraper to reciprocate along the cavity in a first direction to clean the cavity. Therefore, the coating die head can be cleaned without opening the cavity, and the time and labor intensity required for maintenance and cleaning are reduced. Further, in some embodiments, the scraper has a through hole in the middle thereof which is adapted to the shape of the outer periphery of the flow guide magnetic shaft, and the contour of the scraper is adapted to the shape of the cavity, and this scheme can clean all the side walls in the cavity, thereby improving the cleaning effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0020] Figure 1 An exploded view of the coating die head according to an embodiment of this disclosure is shown;

[0021] Figure 2 A schematic diagram showing a second mold head with a flow guide magnetic shaft and a scraper installed in an embodiment of this disclosure is shown;

[0022] Figure 3 A schematic diagram of the structure of the current-guiding magnetic shaft according to an embodiment of this disclosure is shown;

[0023] Figure 4 A schematic diagram of the current-guiding magnetic shaft from another angle is shown in this disclosure embodiment;

[0024] Figure 5 A schematic diagram of the scraper structure according to an embodiment of this disclosure is shown.

[0025] In the diagram: 100, coating die head;

[0026] 101. First die head; 102. Second die head; 103. Gasket; 105. Feed inlet; 107. Drive assembly; 108. Scraper; 109. End wall; 110. Fixing groove;

[0027] 1071. Conductor magnetic shaft; 1072. Groove; 1073. First limiting part; 1074. Iron sheet; 1075. Coil winding; 1076. Permanent magnet;

[0028] 1081, Through hole; 1082, Protrusion; 1082-1, Extension section; 1083, Second limiting part. Detailed Implementation

[0029] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0030] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0031] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0032] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0033] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0034] like Figure 1 and Figure 2 As shown in the figure, this disclosure provides a coating die 100, which can be an extrusion type coating die 100. The coating die 100 includes a first die 101 and a second die 102 (e.g., may also be referred to as an upper die and a lower die), the first die 101 and the second die 102 forming a cavity with a predetermined extension length (e.g., along...). Figure 1 (Extended in the first direction indicated by X shown in the figure), and the coating die 100 is in the coating working direction (i.e. Figure 1 The coating die 100 includes a discharge slit on one side of the second direction (Y shown in the diagram) that connects the inside and outside of the cavity. The coating die 100 also includes a feed inlet 105, which is opened on the side wall of the coating die 100 away from the coating working direction and communicates with the cavity.

[0035] Specifically, in this solution, the first die head 101 and the second die head 102 have a preset extension length along the first direction X. The first die head 101 and the second die head 102 abut against each other and form a cavity with a preset extension length, and a portion of the connection between the two is provided with a gasket 103 of a preset thickness. The area without the gasket 103 forms a discharge slit connecting the inside and outside of the cavity, wherein the discharge slit extends along the length direction of the coating die head 100.

[0036] In addition, the coating die 100 disclosed herein also includes a drive assembly 107 and a scraper 108 disposed in the cavity. The drive assembly 107 has a preset extension length along the first direction X, and its two ends are respectively fixed to two end walls 109 of the coating die 100 in the first direction X. The scraper 108 is a plate-shaped structure with a preset thickness, at least part of its contour is adapted to the shape of the bottom wall of the cavity, and abuts against the bottom wall of the cavity or has a preset gap. The drive assembly 107 includes a power system responsible for providing the power required for sliding of the scraper 108, which is connected to the drive assembly 107 by a sliding connection. That is, the power system can drive the scraper 108 to reciprocate along the first direction X in the cavity, thereby scraping away the sediment and agglomerates at the bottom of the cavity.

[0037] It is worth noting that, referring to the coating die 100 shown in the attached figure, the length direction of the coating die 100 in this design is... Figure 1 The first direction shown is X; the coating working direction refers to the width direction of the coating die 100, i.e. Figure 1 The second direction shown in the diagram is Y; the height direction of the coating die 100 is... Figure 1 The Z direction is shown in the diagram. The slurry coating direction of the coating die 100 in this solution refers to the second direction, which is perpendicular to the first direction.

[0038] Those skilled in the art will understand that the gap between the scraper 108 and the bottom wall of the cavity can be adjusted according to specific needs. This preset gap can be set according to different application scenarios and requirements, for example, it can be set to 1 mm, 2 mm or other specific values.

[0039] The coating die 100 provided in this solution provides the necessary power to the scraper 108 via the power system in the drive assembly 107 during the cyclic operation of the die head during coating operations. This allows the scraper 108 to reciprocate along the first direction X within the cavity. This design allows for direct cleaning of the cavity interior without opening it, improving operational convenience and efficiency. The reciprocating motion of the scraper 108 driven by the power system effectively removes residual material from the cavity, maintaining its cleanliness and ensuring the continuity and quality of the coating process.

[0040] Those skilled in the art will understand that the first die 101 and the second die 102 can also be integrally formed structures, and the discharge slit can be a notch opened on the side wall of the first die 101, the second die 102, or the first die 101 and the second die 102. Furthermore, the coating die 100 formed by the first die 101 and the second die 102 can be of various shapes, such as a cylinder, a cuboid, etc.

[0041] In a specific implementation plan, such as Figure 2 - Figure 5 As shown, the drive assembly 107 includes a current-guiding magnetic shaft 1071 extending along the first direction X and connected to a current source, and a permanent magnet 1076 disposed on the scraper 108. The current-guiding magnetic shaft 1071 has a groove 1072 extending along the first direction X, and the scraper 108 has a protrusion 1082 adapted to the groove 1072. The permanent magnet 1076 is disposed on the protrusion 1082. The permanent magnet 1076 can move under the action of the magnetic field generated after the current-guiding magnetic shaft 1071 is energized, thereby driving the scraper 108 to move along the first direction X on the current-guiding magnetic shaft 1071. The first direction X is parallel to the axis of the current-guiding magnetic shaft 1071.

[0042] like Figure 2 and Figure 3 As shown, in the above scheme, the drive assembly 107 includes a current-conducting magnetic shaft 1071 connected to alternating current, and a permanent magnet 1076 on the scraper 108.

[0043] Specifically, the two ends of the flow-guiding magnetic shaft 1071 are respectively fixed to the two end walls 109 along the length of the cavity. A groove 1072 extending along the first direction X is provided on the flow-guiding magnetic shaft 1071. The scraper 108 has a protrusion 1082 adapted to the groove 1072, and a permanent magnet 1076 is mounted on this protrusion 1082. When the scraper 108 and the flow-guiding magnetic shaft 1071 are in the installed state, the protrusion 1082 is inserted into the groove 1072. In use, when alternating current is applied to the flow-guiding magnetic shaft 1071, the alternating magnetic field generated by the flow-guiding magnetic shaft 1071 acts on the permanent magnet 1076 on the scraper 108, causing the scraper 108 to reciprocate in the first direction X. In other words, the power system in this solution refers to the alternating magnetic field generated after the magnetic shaft 1071 is energized. The alternating magnetic field interacts with the permanent magnet 1076 on the scraper 108, driving the scraper 108 to reciprocate along the first direction X within the cavity. This solution utilizes electromagnetic principles to achieve power transmission of the scraper 108, thereby enabling the scraper 108 to clean the cavity.

[0044] It is worth noting that in this design, one end of the current-guiding magnetic shaft 1071 along its length is provided with a terminal block for connection to AC power, which is connected to an external power source.

[0045] Those skilled in the art will understand that, since the flow guiding magnetic shaft 1071 in this solution extends along the length direction of the coating die head 100, the axis of the flow guiding magnetic shaft 1071 in this solution is parallel to the first direction X.

[0046] In one specific embodiment, the groove 1072 has an iron sheet 1074, and the surface of the iron sheet 1074 has coil windings 1075 arranged at intervals. When the coil windings 1075 are energized with alternating current, the current-guiding magnetic shaft 1071 generates an alternating magnetic field. In the first direction X, at least two permanent magnets 1076 with opposite magnetic poles are arranged side by side on the surface of the protrusion 1082. The two permanent magnets 1076 can move under the action of the alternating magnetic field to drive the scraper 108 to reciprocate along the first direction X on the current-guiding magnetic shaft 1071, thereby cleaning the coating die head 100.

[0047] Those skilled in the art will understand that the number of permanent magnets 1076 is not limited in this solution. That is to say, the number of permanent magnets 1076 can be determined according to the magnetic force requirements and design requirements in actual applications.

[0048] Those skilled in the art will understand that the form of the iron sheet 1074 and the coil winding is not limited in this solution. That is to say, in other solutions, a cylindrical iron core can be provided in the groove, and the coil winding can be wound on the iron core, which can also achieve the solution of this application.

[0049] In one implementation scheme, such as Figure 5 As shown, the scraper 108 is configured as an annular shape, the outer contour of the scraper 108 is adapted to the shape of the cavity, the scraper 108 has a through hole 1081 whose inner contour is adapted to the outer peripheral shape of the flow guiding magnetic shaft 1071, and the scraper 108 is sleeved on the flow guiding magnetic shaft 1071 through the through hole 1081.

[0050] A first limiting part 1073 is recessed on the side wall of the groove 1072, and the protrusion 1082 protrudes toward the through hole 1081. The protruding end of the protrusion 1082 is provided with a second limiting part 1083. The second limiting part 1083 is inserted into the first limiting part 1073 so that the scraper 108 is limited in the groove 1072.

[0051] Two first limiting portions 1073 are respectively disposed on opposite sidewalls of the groove 1072. One end of each first limiting portion 1073 is connected to the sidewall of the groove 1072, and the other end extends close to each other along the second direction Y, forming a slot in the groove 1072 between the two extended ends, making the groove 1072 a T-shaped groove. The second direction Y is perpendicular to the axis of the guide magnetic shaft 1071. The protrusion 1082 protrudes toward the through hole 1081 and extends to form an extension section 10. 82-1, the width of the extension section 1082-1 ​​is smaller than the groove width of the groove 1072, the second limiting part 1083 is disposed at the end of the extension section 1082-1 ​​so that the protrusion 1082 is a T-shaped block, and the permanent magnet is mounted on the surface of the second limiting part 1083; by the extension section 1082-1 ​​being inserted into the groove and the second limiting part being inserted into the first limiting part 1073, the protrusion 1082 is limited in the groove 1072, that is, the T-shaped block is limited in the T-shaped groove.

[0052] like Figure 4 As shown, in the above scheme, the groove 1072 is located below the guide magnetic shaft 1071, that is, the opening of the groove 1072 faces the bottom wall of the cavity. Two first limiting portions 1073 are provided at the opening of the groove 1072. Specifically, one end of each of the two first limiting portions 1073 is connected to the side wall of the groove 1072, and the other end extends closer to each other along the second direction Y, forming a slot between the extended ends. This makes the shape of the groove 1072 in this scheme a T-shaped groove that matches the shape of the protrusion 1082. In other words, there is a certain gap between the two first limiting portions 1073 in this scheme, and this gap is the slot of the groove 1072.

[0053] The scraper 108 has an upwardly extending protrusion 1082, which includes an extension section 1082-1 ​​and a second limiting section 1083. Specifically, the extension section 1082-1 ​​is a cuboid with a preset extension height, one end of which is connected to the scraper 108, and the other end extends upward. The second limiting section 1083 is connected to the extension end, and a permanent magnet is disposed on the upper surface of the second limiting section 1083.

[0054] More specifically, the width of the extension 1082-1 ​​is less than the width of the slot, and the width of the second limiting part 1083 is greater than the width of the slot. When the scraper 108 and the guide magnetic shaft 1071 are in the assembled state, the protrusion 1082 is inserted into the slot, and the second limiting part 1083 is inserted into the first limiting part 1073. In other words, the protrusion 1082 in this solution is a T-shaped block, which is assembled with the T-shaped groove to fix the scraper 108 on the guide magnetic shaft 1071. It can be understood that the first limiting part 1073 and the second limiting part 1083 are not limited to T-shaped, but can also be other shapes, such as L-shaped, Y-shaped, etc. Of course, the first limiting part 1073 can also be a protruding structure provided in the groove 1072, and the second limiting part 1083 can be a recessed structure provided on the protrusion 1082. The first limiting part 1073 and the second limiting part 1083 can also be inserted and matched. As long as the two can be inserted and connected, they are within the scope of protection of this solution and are not limited here.

[0055] Since the first limiting part 1073 in this design extends along the second direction Y, and the width of the second limiting part 1083 is greater than the width of the extension section 1082-1, during installation, the scraper 108 fits the second limiting part 1083 into the groove 1072 at its end along the length direction. At this time, the permanent magnet 1076 on the upper surface of the second limiting part 1083 is positioned opposite to the coil winding 1075 in the groove, and the lower surface of the second limiting part 1083 abuts against the upper surfaces of the two first limiting parts 1073 respectively. The extension section 1082-1 ​​is positioned at the gap (i.e., the slot) between the two first limiting parts 1073. This design allows the scraper 108 to be limited on the guide magnetic shaft 1071, preventing the scraper 108 from falling out of the groove 1072.

[0056] It is worth noting that the length direction of the groove 1072 is the same as the length direction of the coating die 100, and the width direction of the groove 1072 is the same as the width direction of the coating die. In addition, the width direction of the protrusion 1082 and the second limiting part 1083 is the second direction Y.

[0057] Those skilled in the art will understand that the orientation of the opening of the groove 1072 is not limited in this solution. That is, in other embodiments, the opening of the groove 1072 can be oriented towards the top wall of the cavity. In this case, the first limiting part 1073 is not required on the groove 1072, and the second limiting part 1083 is not required on the scraper (only the extension section is required). During installation, it is only necessary to insert the extension section 1082-1 ​​on the scraper 108 into the groove 1072.

[0058] In some implementations, the shape of the current-guiding magnetic shaft 1071 can be any one of the following: spindle shape, wedge shape, or cylindrical shape.

[0059] In one specific embodiment, the guide magnetic shaft 1071 can be spindle-shaped. This spindle-shaped guide magnetic shaft 1071 includes three guide surfaces, one of which faces the bottom wall of the cavity, and a groove 1072 is provided on the guide surface facing the bottom wall. Furthermore, in this embodiment, the radial extension length of the guide surface of the guide magnetic shaft 1071 gradually decreases from the middle to both ends, where the two ends of the guide surface refer to the two ends in the length direction of the guide magnetic shaft 1071. In this embodiment, by setting the guide magnetic shaft 1071 to a spindle shape, the slurry is guided, thereby achieving pressure equalization of the material in the cavity.

[0060] Those skilled in the art will understand that the shape of the current-guiding magnetic shaft 1071 is not limited to the spindle shape described in the above scheme, but can also be other shapes, such as wedge or cylindrical.

[0061] In this design, the scraper 108 is annular, and has a through hole 1081 in the middle whose inner contour matches the shape of the outer periphery of the guide magnetic shaft 1071. The scraper 108 is fitted onto the guide magnetic shaft 1071 through the through hole. The spindle-shaped guide magnetic shaft 1071 was described in detail in the above design. In this design, the contour of the through hole 1081 matches the shape of the guide surface on the guide magnetic shaft 1071, i.e., three triangles are provided in the through hole 1081. Additionally, a protrusion 1082 is provided on the inner peripheral wall of the scraper 108, where the inner peripheral wall of the scraper 108 refers to the peripheral wall surrounding the through hole 1081. When the scraper 108 and the guide magnetic shaft 1071 are assembled, the scraper 108 is fitted onto the guide magnetic shaft 1071, and the protrusion 1082 on the scraper 108 is inserted into the groove 1072 in the guide magnetic shaft 1071. This design employs a configuration where the contour of the scraper 108 not only matches the bottom wall but also the side walls of the entire cavity. This allows the scraper 108 to clean all the side walls within the cavity as it moves.

[0062] Those skilled in the art will understand that the matching of the profile of the scraper 108 with the sidewall of the entire cavity means that the profile shape of the scraper 108 is the same as the shape of the inner wall of the cavity, and there is a preset gap between them.

[0063] In one specific embodiment, a fixing groove 110 adapted to the end of the flow guiding magnetic shaft 1071 is formed on the inner surface of the two end walls 109 of the cavity. The fixing groove is used to fix the flow guiding magnetic shaft 1071.

[0064] like Figure 2As shown, fixing grooves 110 adapted to the ends of the flow guiding magnetic shaft 1071 are formed on the inner surfaces of the two end walls 109 along the length of the cavity. During installation, the two ends of the flow guiding magnetic shaft 1071 are fixed in the fixing grooves 110 and then installed in the cavity.

[0065] Those skilled in the art will understand that the shape of the fixing groove 110 can be set according to the shape of the guide magnetic shaft 1071.

[0066] In one specific implementation, at least one of the end walls 109 of the cavity is provided with a mounting groove adapted to the scraper 108, the mounting groove being used to accommodate the scraper 108.

[0067] An installation groove extending outward is formed on the inner surface of any end wall 109 along the length of the cavity. The shape and thickness of the installation groove are adapted to the scraper 108. When the coating operation is performed, the scraper 108 is placed in the installation groove. At this time, the material enters the cavity from the feed port 105 without obstruction and can flow evenly to both ends of the cavity.

[0068] In one embodiment, the drive assembly 107 is a magnetically coupled rodless cylinder, which includes an internal piston and an external slide block. The scraper 108 is fixedly connected to the slide block, and the piston drives the slide block and the scraper 108 to move.

[0069] In this solution, the drive component 107 can be not only the solution mentioned above, but also a magnetically coupled rodless cylinder.

[0070] As will be understood by those skilled in the art, the magnetically coupled rodless cylinder has an internal piston and an external slider. The piston has a high-strength permanent magnetic ring, and the slider has a magnetic ring inside. These two sets of magnetic rings interact through magnetic lines of force, achieving synchronous movement of the piston and the external slider. The two ends of the magnetically coupled rodless cylinder are fixed to the end walls 109 within the cavity. The scraper 108 is fixedly connected to the slider. When the piston and slider move synchronously, the scraper 108 on the slider also moves with the slider, thus still achieving cleaning of the cavity.

[0071] In some embodiments, this disclosure also provides a coating apparatus, the coating apparatus including the coating die head 100 described above, the coating apparatus further including a main control system and a power controller connected to the main control system; after the main control system starts the die head cycle, the power controller outputs an alternating current signal to drive the scraper 108 to move.

[0072] In one specific implementation, the coating apparatus further includes a main control system and a power controller connected to the main control system; after the main control system starts the die head cycle, the power controller outputs alternating current signals to drive the scraper 108 to move.

[0073] In this design, the coating apparatus includes a main control system responsible for controlling the entire coating process. Connected to the main control system is a power controller, whose function is to output alternating current to drive the scraper 108 after the main control system initiates the die head cycle. Specifically, when the coating main control system starts the die head cycle, the power controller immediately outputs alternating current to the guide magnetic shaft 1071, thereby causing the scraper 108 mover to actuate. The movement of the scraper 108 automatically removes sediment and agglomerates at the bottom of the flow channel, thus maintaining the continuity and uniformity of the coating process. This design ensures the automation and efficiency of the coating machine during operation, reduces manual intervention, and improves production efficiency and coating quality.

[0074] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A coating die head, characterized in that, The coating die head has a cavity for receiving the coating slurry, and the coating die head further includes: A drive assembly (107) is disposed in the cavity, and its two ends extending along a first direction are respectively fixed to the end wall (109) of the cavity, wherein the drive assembly (107) includes a power system; A scraper (108) is disposed in the cavity and abuts against the bottom wall of the cavity or has a preset gap; the scraper (108) is slidably connected to the drive assembly (107), and the power system drives the scraper (108) to reciprocate in the first direction, which is perpendicular to the slurry coating direction of the coating die.

2. The coating die head according to claim 1, characterized in that, The drive assembly (107) includes a current-conducting magnetic shaft (1071) extending along the first direction and connected to a current source, and a permanent magnet (1076) disposed on the scraper (108). The flow guiding magnetic shaft (1071) has a groove (1072) extending along the first direction. The scraper (108) has a protrusion (1082) adapted to the groove (1072). The permanent magnet (1076) is provided on the protrusion (1082). The permanent magnet (1076) is inserted into the groove (1072) through the protrusion (1082). The permanent magnet (1076) can move under the action of the magnetic field generated after the flow guiding magnetic shaft (1071) is energized, so as to drive the scraper (108) to move along the first direction on the flow guiding magnetic shaft (1071). The first direction is parallel to the axis of the flow guiding magnetic shaft (1071).

3. The coating die head according to claim 2, characterized in that, The groove (1072) contains an iron sheet (1074), and the surface of the iron sheet (1074) has coil windings (1075) arranged at intervals. When the coil windings (1075) are energized with alternating current, the current-guiding magnetic shaft (1071) generates an alternating magnetic field. In the first direction, at least two permanent magnets (1076) with opposite magnetic poles are arranged side by side on the surface of the protrusion (1082). The two permanent magnets (1076) can move under the action of the alternating magnetic field to drive the scraper (108) to reciprocate along the first direction on the current-guiding magnetic shaft (1071).

4. The coating die head according to claim 2, characterized in that, The scraper (108) is configured as an annular shape, the outer contour of the scraper (108) is adapted to the shape of the cavity, the scraper (108) has a through hole (1081) whose inner contour is adapted to the outer peripheral shape of the flow guide magnetic shaft (1071), and the scraper (108) is sleeved on the flow guide magnetic shaft (1071) through the through hole (1081).

5. The coating die head according to claim 4, characterized in that, A first limiting part (1073) is recessed on the side wall of the groove (1072), and the protrusion (1082) protrudes into the through hole (1081). The protruding end of the protrusion (1082) is provided with a second limiting part (1083). The second limiting part (1083) is inserted into the first limiting part (1073) so that the scraper (108) is limited in the groove (1072).

6. The coating die head according to claim 5, characterized in that, The first limiting part (1073) has two and is respectively provided on the opposite sidewall of the groove (1072). One end of the two first limiting parts (1073) is connected to the sidewall of the groove (1072), and the other end extends close to each other along the second direction, and the groove (1072) is formed between the two extended ends, wherein the second direction is perpendicular to the axis of the guide magnetic shaft (1071). The protrusion (1082) protrudes into the through hole (1081) and extends to form an extension section (1082-1). The width of the extension section (1082-1) is smaller than the groove width of the groove (1072). The second limiting part (1083) is disposed at the end of the extension section (1082-1). The permanent magnet is mounted on the surface of the second limiting part (1083). The protrusion (1082) is limited in the groove (1072) by the extension section (1082-1) being inserted into the groove and the second limiting part being inserted into the first limiting part (1073).

7. The coating die head according to claim 2, characterized in that, The shape of the current-guiding magnetic shaft (1071) can be any one of the following: spindle shape, wedge shape, or cylindrical shape.

8. The coating die head according to claim 2, characterized in that, At least one of the end walls (109) of the cavity has an inner surface with a mounting groove adapted to the scraper (108), the mounting groove being used to accommodate the scraper (108); and / or, Fixing grooves adapted to the ends of the flow guiding magnetic shaft (1071) are provided on the inner surfaces of the two end walls (109) of the cavity. The fixing grooves are used to fix the flow guiding magnetic shaft (1071).

9. The coating die head according to claim 1, characterized in that, The drive assembly (107) is a magnetically coupled rodless cylinder. The magnetically coupled rodless cylinder includes an internal piston and an external slide block. The scraper (108) is fixedly connected to the slide block. The piston drives the slide block and the scraper (108) to move.

10. A coating apparatus, characterized in that, The coating apparatus includes the coating die head according to any one of claims 1-9, and further includes a main control system and a power controller connected to the main control system; After the main control system starts the mold head cycle, the power controller outputs alternating current signals to drive the scraper (108) to move.

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