Coating die head and coating device

Abstract

The utility model discloses a coating die head and a coating device, and belongs to the field of battery pole piece processing equipment. The coating die head comprises a die head body, a plugging assembly and a switching assembly. A cavity is formed in the die head body, the plugging assembly comprises a first plugging piece and a second plugging piece, the first plugging piece is provided with a first position and a second position, and the first plugging piece is configured in the mode that at the first position, the second plugging piece completely plugs the part, in the first direction, of the cavity; and at the second position, the second plugging piece partially plugs the part of the cavity in the first direction, and the first direction is parallel to the length direction of the die head body. The switching assembly is configured to drive the first plugging piece to be switched between the second position and the first position so as to adjust the effective length of the cavity to adapt to the width of the base material, and the effective length is the length of the part, containing the slurry, of the cavity in the first direction. By adopting the coating die head with the structure, the frequency of replacing the coating die head during production of pole pieces with different breadths can be reduced, so that the downtime is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of battery pole piece processing equipment, in particular to a coating die and a coating device. BACKGROUND

[0002] Coating is an essential process in the production of batteries, mainly applied in the production of battery pole pieces. Coating in the production of pole pieces refers to the process of uniformly, continuously or intermittently coating the prepared paste-like thick slurry on the substrate of the pole piece through a coating die. The thickness consistency of each coating position needs to be ensured during the coating process, and the coating thickness needs to be controlled within the tolerance range required by the process.

[0003] When coating the substrate with slurry, the coating die needs to be frequently replaced when producing pole pieces of different widths, resulting in a long downtime. CONTENT OF THE UTILITY MODEL

[0004] The embodiments of the present application provide a coating die and a coating device, which can reduce the number of times of replacing the coating die when producing pole pieces of different widths, thereby reducing the downtime.

[0005] In a first aspect, the embodiments of the present application provide a coating die for coating slurry on a substrate, which includes a die body, a blocking assembly and a switching assembly. The die body has a cavity therein, the blocking assembly includes a first blocking piece and a second blocking piece, the first blocking piece has a first position and a second position, and the first blocking piece is configured to: in the first position, the second blocking piece completely blocks a portion of the cavity in a first direction, and in the second position, the second blocking piece partially blocks the portion of the cavity in the first direction, the first direction being parallel to the length direction of the die body. The switching assembly is configured to drive the first blocking piece to switch between the second position and the first position, so as to adjust the effective length of the cavity to adapt to the width of the substrate, the effective length being the length of the portion of the cavity containing slurry in the first direction.

[0006] In the above technical solution, the first blocking piece is configured to: in the first position, the second blocking piece completely blocks the portion of the cavity in the first direction, so as to reduce the effective length of the cavity; and in the second position, the second blocking piece partially blocks the portion of the cavity in the first direction, so as to increase the effective length of the cavity, thereby enabling switching between the substrate whose width is adapted to the effective length of the cavity when the first blocking piece is in the first position and the substrate whose width is adapted to the effective length of the cavity when the first blocking piece is in the second position without replacing the coating die, and thus reducing the downtime.

[0007] In some embodiments, the second blocking member forms a receiving cavity with an opening inside, a side of the second blocking member in a second direction forms the opening for the first blocking member to pass through, at least part of the first blocking member is located in the receiving cavity, in the first position, a volume of the part of the first blocking member located outside the receiving cavity is maximum, and the first direction is perpendicular to the second direction.

[0008] In the above technical solution, by adjusting the volume of the first blocking member located outside the receiving cavity of the second blocking member, the blocking assembly can completely block the cavity in the first direction or partially block the cavity in the first direction, and the structure is simple and easy to implement.

[0009] In some embodiments, the switching assembly comprises a slider and a driving mechanism, the slider is movably arranged in the receiving cavity along the first direction, and the driving mechanism is configured to drive the slider to move along the first direction. One of the slider and the first blocking member has a first guide surface, the slider moves along the first direction to guide the first guide surface to move the first blocking member to the first position along the second direction, and the second direction is parallel to the direction of gravity.

[0010] In the above technical solution, by driving the slider to move along the first direction relative to the first blocking member through the driving mechanism, the slider and the first blocking member can be simply moved along the first direction relative to the first guide surface, and then the guide surface guides the first blocking member to move to the first position along the second direction.

[0011] In some embodiments, along the second direction, a side of the first blocking member facing the slider has the first guide surface, and a side of the slider facing the first blocking member has a second guide surface parallel to the first guide surface.

[0012] In the above technical solution, the first guide surface is arranged on a side of the first blocking member facing the slider, and the second guide surface parallel to the first guide surface is arranged on a side of the slider facing the first blocking member, so that the slider and the first blocking member form a surface contact, thereby increasing the contact area, and the stability and reliability of the transmission between the slider and the first blocking member can be improved compared with the embodiment in which the slider and the first blocking member form a line contact.

[0013] In some embodiments, the switching assembly further comprises a rotating shaft, the rotating shaft is rotatably arranged on the second guide surface, a circumferential side of the rotating shaft is used to abut against the first guide surface, and the rotating axis of the rotating shaft, the first direction and the second direction are perpendicular to each other.

[0014] In the technical scheme, the rotating shaft is arranged on the second guide surface, and the circumferential side of the rotating shaft is in abutment with the first guide surface, so that the sliding friction between the first guide surface and the second guide surface is converted into the rolling friction of the circumferential side of the rotating shaft, thereby reducing the abrasion of the first guide surface, and further increasing the service life of the plugging assembly.

[0015] In some embodiments, the rotating shafts are arranged in plurality, and the plurality of rotating shafts are arranged in the direction perpendicular to the rotating shaft axes.

[0016] In the technical scheme, the rotating shafts are arranged in plurality in the direction perpendicular to the rotating shaft axes, so that each of the plurality of rotating shafts can be in abutment with the first guide surface, and the stress on the first plugging member is more uniform, which is beneficial to improving the stability of the transmission between the sliding block and the first plugging member.

[0017] In some embodiments, the coating die further comprises an adjusting mechanism connected to the second plugging member, and the adjusting mechanism is used to adjust the position of the plugging assembly in the first direction when the first plugging member is located at the first position, so as to change the effective length of the cavity.

[0018] In the technical scheme, the effective length of the cavity is adjusted by using the adjusting mechanism to drive the plugging assembly to move when the first plugging member is located at the first position, so that the effective length of the cavity can be steplessly adjusted, and the effective length of the cavity can be more easily matched with the width of the substrate through stepless adjustment, thereby the effective length of the cavity can be adapted to substrates of more widths, so that the replacement frequency of the coating die is further reduced, and the downtime is reduced.

[0019] In some embodiments, the adjusting mechanism comprises a first adjusting member, one end of the first adjusting member is connected to the second plugging member, the first end of the cavity in the first direction has a first through hole for the first adjusting member to pass through, and the other end of the first adjusting member is located outside the die body.

[0020] In the technical scheme, the first adjusting member passing through the first through hole is used as part of the adjusting mechanism, on the one hand, the operator can adjust the filler outside the die body by using the first adjusting member; on the other hand, in the embodiment in which the mechanical equipment is used to drive the first adjusting member to move, the mechanical equipment can also be arranged outside the die body.

[0021] In some embodiments, the adjusting mechanism further comprises a fixing member arranged at the first end of the die body and having a first threaded hole coaxially arranged and communicated with the first through hole; the first adjusting member comprises a first tube body and a second tube body, one end of the first tube body is connected with the second blocking member, one end of the second tube body is rotationally arranged at the other end of the first tube body, and the second tube body is threadedly connected with the first threaded hole.

[0022] In the above technical solution, since the second tube body is threadedly connected with the first threaded hole, when the second tube body is rotated, the second tube body can drive the first tube body to move along the axial direction thereof, and since one end of the first tube body is rotationally connected with the second blocking member, when the second tube body drives the first tube body to move along the axial direction thereof, the second blocking member will slide along the first direction with the first tube body, on the one hand, the effective length of the cavity is adjusted; on the other hand, the slurry condensed on the cavity can be removed, so as to reduce the cleaning frequency of the cavity and thus reduce the downtime; at the same time, since the threaded connection has a certain self-locking ability, when the pressure inside the cavity rises, the second tube body can limit the movement of the first tube body in the first direction, thereby limiting the movement of the second blocking member in the first direction.

[0023] In some embodiments, the fixing member is provided with a scale line for indicating the effective length of the cavity.

[0024] In the above technical solution, the fixing member is provided with a scale line for indicating the effective length of the cavity, and during the adjustment of the effective length of the cavity, the scale line can confirm the final size of the effective length of the cavity after adjustment. Thus, the matching rate of the effective length of the cavity with the width of the substrate after adjustment is improved.

[0025] In some embodiments, the driving mechanism comprises a second adjusting member, the second adjusting member is arranged through the second blocking member, one end of the second adjusting member is connected with the sliding block, and the other end of the second adjusting member is located in the first tube body or the second tube body.

[0026] In the above technical solution, the second adjusting member arranged through the second blocking member and having one end located in the first tube body or the second tube body is used as part of the driving mechanism, so that the operator can adjust the sliding block outside the second blocking member by using the second adjusting member, and since one end of the second adjusting member is arranged in the first tube body or the second tube body, the first tube body and the second tube body can protect the structure of the second adjusting member, thereby reducing the risk of accidental touch of the second adjusting member.

[0027] In some embodiments, the second adjusting member comprises a first body and a second body, one end of the first body is connected with the slider, the other end of the first body is provided with a second threaded hole, and the second body is rotationally arranged in the first pipe body and is threadedly connected with the second threaded hole.

[0028] In the above technical solution, since the second body is threadedly connected with the second threaded hole, on the one hand, when the second body is rotated, the first body moves along the axial direction of the first body relative to the second body, and since one end of the first body is rotationally connected with the slider, the slider slides along the first direction along with the first body when the first body moves along the axial direction of the first body, so as to adjust the effective length of the cavity. On the other hand, since the threaded connection has a certain self-locking ability, when the first blocking member moves to the second position, the second body can limit the movement of the first body along the axial direction of the first body, thereby limiting the movement of the slider along the first direction and limiting the movement of the first blocking member to the second position.

[0029] In some embodiments, the first blocking member comprises a main body portion and an elastic portion, the main body portion has two first sides arranged opposite in a third direction, and the elastic portion at least covers the first side of the main body portion. When the first blocking member is located at the first position, the elastic portion expands to block the gap between the first side and the wall portion of the cavity in the third direction. The first direction, the second direction and the third direction are perpendicular to each other.

[0030] In the above technical solution, when the first blocking member is located at the first position, the elastic portion expands to block the gap between the first side and the wall portion of the cavity in the third direction, so as to improve the sealing performance between the blocking assembly and the wall portion of the cavity when the first blocking member is located at the first position.

[0031] In some embodiments, both sides of the accommodating cavity in the third direction are provided with third guide surfaces, and when the first blocking member switches from the second position to the first position, the third guide surfaces are used to guide the elastic portion to expand in the direction close to the wall portion of the cavity in the third direction.

[0032] In the above technical solution, when the first blocking member switches from the second position to the first position, the third guide surfaces are used to guide the elastic portion to expand in the direction close to the wall portion of the cavity in the third direction, so as to reduce the risk that the step surface between the first blocking member and the second blocking member causes the gap between the elastic member and the second blocking member to reduce the sealing performance of the blocking assembly.

[0033] In some embodiments, the main body portion has a second side located outside the accommodating cavity in the second direction, the second side is adjacent to the first side, and the elastic portion covers the second side.

[0034] In the above technical solution, the elastic part covers the second side to reduce the risk of the first sealing member scratching the inner wall of the cavity when it moves relative to the cavity in the first direction.

[0035] Secondly, embodiments of this application also provide a coating apparatus, including the coating die head described above. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure of the coating die provided in some embodiments of this application;

[0038] Figure 2 This is a schematic diagram of the coating die head structure provided in some embodiments of this application when the first sealing member is in the first position;

[0039] Figure 3 This is a schematic diagram of the structure of the blocking component and the switching component provided in some embodiments of this application;

[0040] Figure 4 A schematic diagram of the structure of the blocking component and the switching component in another direction provided in some embodiments of this application;

[0041] Figure 5 for Figure 4 Enlarged view of point A in the middle;

[0042] Figure 6 Schematic diagrams of the blocking components, switching components, and adjusting mechanisms provided in some embodiments of this application;

[0043] Figure 7 A schematic diagram of the structure of the blocking component, switching component, and adjusting mechanism in another direction provided in some embodiments of this application;

[0044] Figure 8 for Figure 7 A cross-sectional view of BB.

[0045] Icon: 100 - Coating Die Head;

[0046] 10-Die head body; 11-First die head body; 12-Second die head body; 101-Cavity;

[0047] 20 - occlusion assembly; 21 - first occlusion member; 211 - body portion; 211A - first side; 211B - second side; 212 - resilient portion; 21A - first guide surface; 21B - relief portion; 22 - second occlusion member; 221 - receiving cavity; 222 - opening;

[0048] 30 - switching assembly; 31 - slider; 311 - rotation axis; 31A - second guide surface; 32 - drive mechanism; 321 - second adjustment member; 321A - first body; 321B - second body;

[0049] 40 - adjustment mechanism; 41 - first adjustment member; 411 - first tube; 412 - second tube; 42 - fixing member; 421 - scale;

[0050] X - first direction; Y - second direction; Z - third direction. DETAILED DESCRIPTION

[0051] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of the present application.

[0052] Unless otherwise defined, all technical and scientific terms used in the present application have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application; the terms "include" and "have" and any variations thereof in the specification and claims of the present application and the above description of drawings are intended to cover non-exclusive inclusion. The terms "first", "second" and the like in the specification and claims of the present application and the above description of drawings are used to distinguish different objects, not to describe a particular order or primary and secondary relationship.

[0053] In the present application, the phrase "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment to other embodiments.

[0054] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting", "attachment" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be directly connected, or indirectly connected through an intermediate medium; can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0055] The term "and / or" in the present application is only to describe the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B can mean that A exists alone, A and B exist together, and B exists alone. In addition, the character " / " in the present application generally represents that the front and rear associated objects have an "or" relationship.

[0056] In the embodiments of the present application, the same reference signs represent the same components, and for the sake of brevity, the detailed description of the same components is omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, and the overall thickness, length, width and other dimensions of the integrated device are only exemplary and should not constitute any limitation on the present application.

[0057] "Multiple" appearing in the present application means two or more (including two).

[0058] At present, from the development of market situation, the application of power battery is more and more widely. Power battery is not only applied to energy storage power supply system of water power, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0059] Coating is to cover a thin layer of coating material in the form of liquid or powder on the surface of fabric, paper, metal foil or plate, etc. And coating is an indispensable step in the process of manufacturing battery monomer.

[0060] A battery cell includes an electrode assembly and an electrolyte, and the electrode assembly is composed of a positive electrode tab, a negative electrode tab, and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode tab and the negative electrode tab to work. The positive electrode tab includes a positive electrode current collector and a positive electrode active material layer, and the positive electrode active material layer is coated on part of the surface of the positive electrode current collector. The positive electrode current collector without the positive electrode active material layer serves as a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium, or lithium manganate. The negative electrode tab includes a negative electrode current collector and a negative electrode active material layer, and the negative electrode active material layer is coated on part of the surface of the negative electrode current collector. The negative electrode current collector without the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon. In order to ensure that the fuse does not occur when passing a large current, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0061] In the production process of the battery cell, the positive electrode active material is coated on the positive electrode current collector, and the negative electrode active material is coated on the negative electrode current collector. The coating process is used for uniformly, continuously or intermittently coating the prepared paste-like thick slurry (positive electrode active material or negative electrode active material) on the substrate (positive electrode current collector or negative electrode current collector). The thickness consistency of each coating position needs to be ensured during coating, and the coating thickness needs to be controlled within the tolerance range required by the process.

[0062] The coating device used in the coating process includes a coating die, a feeding pipe, and a slurry tank. The die body has a feeding port, a cavity, and a discharging port. The slurry in the slurry tank enters the cavity through the feeding pipe from the feeding port, and then is sprayed out of the discharging port to be coated on the substrate.

[0063] In actual production, the sizes of different types of lithium batteries are quite different. In the coating process, the cavity size of the coating die needs to match the width size of the substrate, otherwise there will be a lot of problems in the process. For example, when the cavity size of the die is smaller than the width size of the substrate, qualified electrode tabs cannot be produced. When the cavity size of the die is much larger than the width size of the substrate, the flowability of the slurry at the end of the cavity will be poor, and various problems such as gelation, agglomeration, and sedimentation will occur. The occurrence of the above problems will also cause the pressure fluctuation of the cavity and the coating weight fluctuation. In order to solve such abnormal problems, the die can be cleaned, but frequent cleaning of the die will cause serious loss of materials. Therefore, the commonly used solution is to replace the coating die matched with the size of the electrode tab when producing electrode tabs with different widths, which requires a long downtime.

[0064] Based on the above considerations, in order to reduce the number of coating die, thereby reducing downtime, the present application provides a coating die for coating slurry on a substrate, which comprises a die body, a blocking assembly and a switching assembly. The die body has a cavity therein, the blocking assembly comprises a first blocking piece and a second blocking piece, the first blocking piece has a first position and a second position, the first blocking piece is configured to: in the first position, the second blocking piece completely blocks the cavity in a first direction, in the second position, the second blocking piece partially blocks the cavity in the first direction, the first direction is parallel to the length direction of the die body. The switching assembly is configured to drive the first blocking piece to switch between the second position and the first position, so as to adjust the effective length of the cavity to adapt to the width of the substrate, the effective length being the length of the part of the cavity containing slurry in the first direction.

[0065] In the coating die with such a structure, the first blocking piece is configured to: in the first position, the second blocking piece completely blocks the cavity in the first direction, so as to reduce the effective length of the cavity; in the second position, the second blocking piece partially blocks the cavity in the first direction, so as to increase the effective length of the cavity, so that when switching between the substrate with a width that matches the effective length of the cavity when the first blocking piece is in the first position and the substrate with a width that matches the effective length of the cavity when the first blocking piece is in the second position, the coating die does not need to be replaced, thereby reducing downtime.

[0066] The specific structure of the coating die is described in detail below in conjunction with the accompanying drawings.

[0067] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 1 the structure diagram of the coating die 100 provided by some embodiments of the present application, Figure 2 the structure diagram of the coating die 100 when the first blocking piece 21 is in the first position, Figure 3Fig. 1 shows a schematic view of a blocking assembly 20 and a switching assembly 30 according to some embodiments of the present application. Some embodiments of the present application provide a coating die 100 for coating a substrate with a coating slurry, which comprises a die body 10, a blocking assembly 20 and a switching assembly 30. The die body 10 has a cavity 101 therein, the blocking assembly 20 comprises a first blocking member 21 and a second blocking member 22, the first blocking member 21 has a first position and a second position, the first blocking member 21 is configured to completely block a portion of the cavity 101 in a first direction X with the second blocking member 22 in the first position, and partially block the portion of the cavity 101 in the first direction X with the second blocking member 22 in the second position, the first direction X is parallel to the length direction of the die body 10. The switching assembly 30 is configured to drive the first blocking member 21 to switch between the second position and the first position, so as to adjust the effective length of the cavity 101 to adapt to the width of the substrate, the effective length being the length of the portion of the cavity 101 containing the coating slurry in the first direction X.

[0068] The die body 10 is a part of the coating die 100 for uniformly spreading the coating slurry on the surface of the substrate.

[0069] In some embodiments, referring to Figure 1 , the die body 10 comprises a first die body 11 and a second die body 12 arranged in a stack, the cavity 101 is provided in the first die body 11 or the second die body 12, and the cavity 101 is located on the opposite side of the first die body 11 and the second die body 12.

[0070] It can be understood that the first die body 11 and the second die body 12 are generally metal pieces, so as to have high strength and rigidity, thereby reducing the risk of deformation of the die body 10 when the pressure in the first containing cavity 221 is too large.

[0071] Exemplarily, the first die body 11 and the second die body 12 can be connected by screws, or the first die body 11 and the second die body 12 can be connected by buckles, or the first die body 11 and the second die body 12 can be clamped by clamps.

[0072] “the cavity 101 is provided in the first die body 11 or the second die body 12, and the cavity 101 is located on the opposite side of the first die body 11 and the second die body 12” can mean that the cavity 101 is provided in the first die body 11 and located on the side of the first die body 11 facing the second die body 12; or the cavity 101 is provided in the second die body 12 and located on the side of the second die body 12 facing the first die body 11.

[0073] The cavity 101 is a space in the die body 10 for containing the coating slurry.

[0074] In some embodiments, the die body 10 has a feeding port in communication with the cavity 101, through which the slurry in the slurry tank enters the cavity 101.

[0075] The blocking assembly 20 is arranged in the cavity 101 to adjust the effective length of the cavity 101 in the first direction X by completely blocking a section of the cavity 101 in the first direction X or incompletely blocking a section of the cavity 101 in the first direction X.

[0076] The first direction X can be the length direction of the die body 10, and the length of the cavity 101 in the first direction X is the effective length.

[0077] The first blocking member 21 and the second blocking member 22 are two bodies of the blocking assembly 20.

[0078] In some embodiments, the first blocking member 21 can be a flexible member with a cavity arranged on the second blocking member 22, and the switching mechanism is to inject gas into the first blocking member 21 to make the first blocking member 21 expand so that the first blocking member 21 and the second blocking member 22 completely block a section of the cavity 101 in the first direction X, thereby making the section of the cavity 101 unable to accommodate the slurry, so as to reduce the effective length of the cavity 101; after the gas in the first blocking member 21 is discharged, the first blocking member 21 shrinks so that the first blocking member 21 and the second blocking member 22 partially block a section of the cavity 101 in the first direction X, thereby making the section of the cavity 101 can be used to accommodate the slurry, so as to increase the effective length of the cavity 101.

[0079] In some embodiments, the first blocking member 21 is slidingly arranged at one end of the second blocking member 22 in the first direction X, and the switching mechanism is a mechanism for driving the first blocking member 21 to move relative to the second blocking member 22 along the second direction Y, such as a gas cylinder, a hydraulic cylinder, etc. When the first blocking member 21 is located at the first position, the wall of the cavity 101 in the second direction Y abuts against the first blocking member 21, and in the projection plane perpendicular to the first direction X, the orthographic projection of the first blocking member 21 and the orthographic projection of the second blocking member 22 completely fill the orthographic projection of the cavity 101, thereby making the first blocking member 21 and the second blocking member 22 completely block a section of the cavity 101 in the first direction X, so as to reduce the effective length of the cavity 101; when the first blocking member 21 is located at the second position, there is a certain distance between the wall of the cavity 101 in the second direction Y and the first blocking member 21, so that the slurry can be accommodated by the space between the wall of the cavity 101 in the second direction Y and the first blocking member 21, thereby increasing the effective length of the cavity 101.

[0080] Exemplarily, referring to Figure 1 and Figure 2The number of the blocking assemblies 20 can be two, and the two blocking assemblies 20 are respectively located at two ends of the cavity 101 in the first direction X. When the first blocking members 21 of the two blocking assemblies 20 are all located at the first position, the distance between the opposite sides of the two blocking assemblies 20 is the effective length, that is, the slurry is accommodated between the two blocking assemblies 20.

[0081] It should be noted that the number of the blocking assemblies 20 can also be one.

[0082] The material of the blocking assembly 20 is not limited, and various materials such as stainless steel, aluminum, rubber, and polymer can be selected, and the filler of different materials can be replaced according to the different properties of the slurry.

[0083] In the embodiment, the first blocking member 21 is configured to: in the first position, the second blocking member 22 completely blocks the part of the cavity 101 in the first direction X, so as to reduce the effective length of the cavity 101; and in the second position, the second blocking member 22 partially blocks the part of the cavity 101 in the first direction X, so as to increase the effective length of the cavity 101, so that when switching between the substrate with the width adapted to the effective length of the cavity 101 when the first blocking member 21 is located at the first position and the substrate with the width adapted to the effective length of the cavity 101 when the first blocking member 21 is located at the second position, the coating die 100 does not need to be replaced, thereby reducing the downtime.

[0084] Please refer to Figure 3 According to some embodiments of the present application, the second blocking member 22 forms an accommodation cavity 221 with an opening 222 inside, the side of the second blocking member 22 in the second direction Y forms an opening 222 for the first blocking member 21 to pass through, at least part of the first blocking member 21 is located in the accommodation cavity 221, in the first position, the volume of the part of the first blocking member 21 located outside the accommodation cavity 221 is the largest, and the first direction X is perpendicular to the second direction Y.

[0085] The accommodation cavity 221 is a cavity in the second blocking member 22 for accommodating at least part of the first blocking member 21. It can be understood that the shape of the opening 222 should be adapted to the first blocking member 21 to reduce the risk of the slurry between the cavity wall of the cavity 101 and the second blocking member 22 in the second direction Y entering the accommodation cavity 221 when the first blocking member 21 is located at the second position.

[0086] The second direction Y is a direction perpendicular to the first direction X. For example, the first direction X can be parallel to the length direction of the die body 10, and the second direction Y can be parallel to the width direction or the height direction of the die.

[0087] For the convenience of showing the range of the first blocking member 21, please refer to Figure 3The range of the first blocking member 21 is indicated by a dashed line in the figure. It should be noted that the dashed line is only used to show the range of the first blocking member 21 and does not represent any physical meaning.

[0088] In some embodiments, the switching assembly 30 can be a driving component arranged in the accommodating cavity 221 to drive the first blocking member 21 to move in the second direction Y. For example, the switching assembly 30 can be a pneumatic cylinder, a hydraulic cylinder, or an electric telescopic rod.

[0089] In the embodiment, the volume of the first blocking member 21 outside the accommodating cavity 221 of the second blocking member 22 is adjusted to completely block the cavity 101 in the first direction X or partially block the cavity 101 in the first direction X, which is simple and easy to implement.

[0090] Please refer to Figure 3 and Figure 4 , Figure 4 Figure 4 is a structural schematic view of the blocking assembly 20 and the switching assembly 30 in another direction according to some embodiments of the present application. According to some embodiments of the present application, the switching assembly 30 includes a sliding block 31 and a driving mechanism 32. The sliding block 31 is movably arranged in the accommodating cavity 221 in the first direction X. The driving mechanism 32 is configured to drive the sliding block 31 to move in the first direction X. One of the sliding block 31 and the first blocking member 21 has a first guide surface 21A. The sliding block 31 moves in the first direction X to make the first guide surface 21A guide the first blocking member 21 to move in the second direction Y to the first position. The second direction Y is parallel to the direction of gravity.

[0091] The sliding block 31 is a component that is slidably arranged in the accommodating cavity 221 in the first direction X.

[0092] The first guide surface 21A is a part of the surface of one of the sliding block 31 and the first blocking member 21 facing the side of the other.

[0093] For the convenience of showing the range of the first guide surface 21A, please refer to Figure 3 and Figure 4 The range of the first guide surface 21A is indicated by a dashed line in the figure. It should be noted that the dashed line is only used to show the range of the first guide surface 21A and does not represent any physical meaning.

[0094] If the first guide surface 21A is arranged on the side of the first sealing member 21 facing the slider 31 in the second direction Y, the first guide surface 21A is inclined towards the side of the first sealing member 21 on which the first guide surface 21A is not arranged in the direction of the effective length of the cavity 101 when the first sealing member 21 is in the first position; if the first guide surface 21A is arranged on the side of the slider 31 facing the first sealing member 21 in the second direction Y, the first guide surface 21A is inclined away from the side of the slider 31 on which the first guide surface 21A is not arranged in the direction of the effective length of the cavity 101 when the first sealing member 21 is in the first position.

[0095] It can be understood that the first guide surface 21A can be a plane or a curved surface.

[0096] The driving mechanism 32 can be a driving component arranged in the accommodation cavity 221 for driving the slider 31 to move in the first direction X. Exemplarily, the switching assembly 30 can be a pneumatic cylinder, a hydraulic cylinder or an electric telescopic rod, etc.

[0097] Specifically, referring to Figure 4 When the slider 31 moves in the N1 direction, the first sealing member 21 moves in the N3 direction towards the first position; when the slider 31 moves in the N2 direction, the first sealing member 21 moves in the N4 direction towards the second position under the action of gravity.

[0098] In the present embodiment, by driving the slider 31 to move in the first direction X relative to the first sealing member 21 by the driving mechanism 32, the movement of one of the slider 31 and the first sealing member 21 in the first direction X relative to the first guide surface 21A can be simply realized, and the first sealing member 21 is guided by the guide surface to move in the second direction Y towards the first position.

[0099] Please refer to Figure 3 , Figure 4 and Figure 5 , Figure 5 which are enlarged views of A in Figure 4 . According to some embodiments of the present application, on the side of the first sealing member 21 facing the slider 31 in the second direction Y, the first guide surface 21A is arranged, and on the side of the slider 31 facing the first sealing member 21, the second guide surface 31A parallel to the first guide surface 21A is arranged.

[0100] The second guide surface 31A is a part of the surface of the other one of the slider 31 and the first sealing member 21 on which the first guide surface 21A is not arranged, facing the first guide surface 21A.

[0101] In order to show the range of the second guide surface 31A, please refer to Figure 3 , Figure 4 and Figure 5The range where the first guide surface 21A is located is indicated by a dashed line in the figure. It should be noted that the dashed line is only used to show the range of the first guide surface 21A and does not represent any physical meaning.

[0102] The second guide surface 31A is arranged in parallel with the first guide surface 21A so that the slider 31 and the first blocking member 21 form a surface contact, thereby increasing the contact area and improving the reliability of the transmission.

[0103] In the embodiment, the side of the first blocking member 21 facing the slider 31 has the first guide surface 21A, and the side of the slider 31 facing the first blocking member 21 has the second guide surface 31A parallel to the first guide surface 21A, so that the slider 31 and the first blocking member 21 form a surface contact, thereby increasing the contact area and improving the stability and reliability of the transmission between the slider 31 and the first blocking member 21 compared with the embodiment in which the slider 31 and the first blocking member 21 form a line contact.

[0104] Please refer to Figure 4 and Figure 5 According to some embodiments of the present application, the switching assembly 30 further comprises a rotating shaft 311 rotatably arranged on the second guide surface 31A, the circumferential side of the rotating shaft 311 is used to abut against the first guide surface 21A, and the rotation axis of the rotating shaft 311, the first direction X and the second direction Y are perpendicular to each other.

[0105] The rotating shaft 311 is a cylindrical part rotatably arranged on the second guide surface 31A.

[0106] In some embodiments, the second guide surface 31A is recessed in a direction away from the first guide surface 21A to form a groove, and the two ends of the rotating shaft 311 are rotatably arranged on the two side walls of the groove in the third direction Z, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other. For example, the first direction X can be parallel to the length direction of the die body 10, the second direction Y can be parallel to the width direction of the die, and the third direction Z can be parallel to the height direction of the die body 10.

[0107] In the embodiment, by arranging the rotating shaft 311 on the second guide surface 31A and making the circumferential side of the rotating shaft 311 abut against the first guide surface 21A, the sliding friction between the first guide surface 21A and the second guide surface 31A is converted into rolling friction between the first guide surface 21A and the circumferential side of the rotating shaft 311, thereby reducing the wear of the first guide surface 21A and prolonging the service life of the blocking assembly 20.

[0108] Please refer to Figure 4 and Figure 5According to some embodiments of the present application, the rotating shaft 311 is provided in plurality, and the plurality of rotating shafts 311 are arranged in a direction perpendicular to the rotating axis of the rotating shafts.

[0109] In the present embodiment, the rotating shaft 311 is provided in plurality and arranged in a direction perpendicular to the rotating axis of the rotating shafts, so that each of the plurality of rotating shafts 311 can abut against the first guide surface 21A, so that the force applied to the first blocking member 21 is more uniform, which is advantageous for improving the stability of the transmission between the slider 31 and the first blocking member 21.

[0110] Please refer to Figure 1 and Figure 2 , and refer to Figure 6 and Figure 7 , Figure 6 the structural schematic diagram of the blocking assembly 20, the switching assembly 30 and the adjusting mechanism 40 provided for some embodiments of the present application, Figure 7 the structural schematic diagram of the blocking assembly 20, the switching assembly 30 and the adjusting mechanism 40 provided for some embodiments of the present application in another direction. According to some embodiments of the present application, the coating die 100 further comprises an adjusting mechanism 40 connected to the second blocking member 22, and the adjusting mechanism 40 is used to adjust the position of the blocking assembly 20 in the first direction X when the first blocking member 21 is located at the first position, so as to change the effective length of the cavity 101.

[0111] The adjusting mechanism 40 can be a driving component arranged in the cavity 101 for driving the second blocking member 22 to move in the first direction X, so as to drive the blocking assembly 20 to move in the first direction X. For example, the adjusting mechanism 40 can be a pneumatic cylinder, a hydraulic cylinder or an electric telescopic rod.

[0112] It can be understood that the arrangement of the adjusting mechanism 40 makes it easier to match the effective length of the cavity 101 with the width of the substrate, and the adjusting method is more flexible and convenient. Moreover, the adjusting method of moving the blocking assembly 20 by the adjusting mechanism 40 to adjust the effective length of the cavity 101 can adjust the effective length of the cavity 101 steplessly.

[0113] In the present embodiment, the adjusting method of moving the blocking assembly 20 by the adjusting mechanism 40 to adjust the effective length of the cavity 101 can adjust the effective length of the cavity 101 steplessly, so that the effective length of the cavity 101 can be matched with the width of the substrate steplessly, and thus the effective length of the cavity 101 can be adapted to substrates with more widths, so as to further reduce the replacement frequency of the coating die 100 and thus reduce the downtime.

[0114] Please refer to Figure 1 and Figure 2 , and refer to Figure 6and Figure 7 According to some embodiments of the present application, the adjusting mechanism 40 comprises a first adjusting member 41, one end of the first adjusting member 41 is connected with the second blocking member 22, the first end of the cavity 101 in the first direction X has a first through hole for the first adjusting member 41 to pass through, and the other end of the first adjusting member 41 is located outside the die body 10.

[0115] The first adjusting member 41 can be a transmission structure in the adjusting mechanism 40 that transmits external force of an external mechanical device to the second blocking member 22.

[0116] In some embodiments, the first adjusting member 41 can be an adjusting rod. By setting one end of the first adjusting member 41 outside the die body 10, an operator can adjust the blocking assembly 20 outside the die body 10 using the first adjusting member 41. Even if a mechanical device is used to drive the first adjusting member 41, the mechanical device can also be placed outside the die body 10. Such a setting mode can facilitate the installation of the mechanical device.

[0117] In the present embodiment, the first adjusting member 41 passing through the first through hole is used as part of the adjusting mechanism 40. On the one hand, an operator can adjust the filling member outside the die body 10 using the first adjusting member 41. On the other hand, in the embodiment in which a mechanical device is used to drive the first adjusting member 41 to move, the mechanical device can also be placed outside the die body 10.

[0118] Please refer to Figure 1 and Figure 2 , and please refer to Figure 6 and Figure 7 According to some embodiments of the present application, the adjusting mechanism 40 further comprises a fixing member 42, which is arranged at the first end of the die body 10 and has a first threaded hole coaxially arranged and communicated with the first through hole; the first adjusting member 41 comprises a first tube body 411 and a second tube body 412, one end of the first tube body 411 is connected with the second blocking member 22, and one end of the second tube body 412 is rotatably arranged at the other end of the first tube body 411, and the second tube body 412 is threadedly connected with the first threaded hole.

[0119] The fixing member 42 can be integrally formed with the die body 10, or can be fixedly installed on the die body 10 as a separate component, or can be separately fixed on a specific support outside the die body 10. The specific support here needs to move together with the die body 10.

[0120] The first tube body 411 and the second tube body 412 are two body parts of the first adjusting member 41. Exemplarily, the first tube body 411 and the second tube body 412 are hollow tubular parts with open ends 222.

[0121] One end of the second tube body 412 is rotationally arranged at the other end of the first tube body 411, and the second tube body 412 is threadedly connected with the first threaded hole. Specifically, when the second tube body 412 is rotated, the second tube body 412 and the first tube body 411 will translate along the length direction thereof. Since the other end of the first tube body 411 is rotationally connected with the blocking assembly 20, when the second tube body 412 and the first tube body 411 translate, the blocking assembly 20 will move along the length direction of the cavity 101, thereby adjusting the effective length of the cavity 101, and removing the slurry condensed on the cavity 101, so as to reduce the cleaning frequency of the cavity 101 and the downtime.

[0122] In the embodiment, since the second tube body 412 is threadedly connected with the first threaded hole, when the second tube body 412 is rotated, the second tube body 412 can drive the first tube body 411 to move along the axial direction thereof. Since one end of the first tube body 411 is rotationally connected with the second blocking piece 22, when the second tube body 412 drives the first tube body 411 to move along the axial direction thereof, the second blocking piece 22 will slide along the first direction X with the first tube body 411, thereby adjusting the effective length of the cavity 101, and removing the slurry condensed on the cavity 101, so as to reduce the cleaning frequency of the cavity 101 and the downtime. Meanwhile, since the threaded connection has a certain self-locking ability, when the pressure inside the cavity 101 rises, the second tube body 412 can limit the movement of the first tube body 411 along the first direction X, thereby limiting the movement of the second blocking piece 22 along the first direction X.

[0123] Please refer to Figure 6 and Figure 7 According to some embodiments of the present application, the fixing piece 42 is provided with a scale line for indicating the effective length of the cavity 101.

[0124] In some embodiments, the fixing piece 42 is provided with a scale 421, the extension direction of the scale 421 is parallel to the extension direction of the first adjusting piece 41, the scale 421 is provided with a scale line, the scale line is arranged outside the scale 421 and along the length direction of the first adjusting piece 41. When the first adjusting piece 41 moves along the first direction X, the scale line can indicate the length of the movement of the first adjusting piece 41, and the effective length of the cavity 101 can be determined according to the indication of the scale line.

[0125] It can be understood that the graduation value and the zero line of the scale line are designed according to actual needs.

[0126] In the embodiment, the fixing member 42 is provided with a scale line for indicating the effective length of the cavity 101. During the adjustment of the effective length of the cavity 101, the scale line can confirm the final size of the effective length of the cavity 101 after the adjustment is completed. Thus, the matching rate of the effective length of the cavity 101 with the width of the base material after the adjustment is improved.

[0127] Please refer to Figure 3 and Figure 4 , and refer to Figure 6 and Figure 7 , according to some embodiments of the application, the driving mechanism 32 includes a second adjusting member 321, the second adjusting member 321 is provided in the second blocking member 22, one end of the second adjusting member 321 is connected with the sliding block 31, and the other end of the second adjusting member 321 is located in the first pipe body 411 or the second pipe body 412.

[0128] The second adjusting member 321 can be a transmission structure in the driving mechanism 32 for transmitting external force of an external mechanical device to the sliding block 31.

[0129] In some embodiments, the second adjusting member 321 can be an adjusting rod. By setting one end of the second adjusting member 321 outside the second blocking member 22 and in the first pipe body 411 or the second pipe body 412, an operator can connect the transmission structure in the first adjusting member 41 with the second adjusting member 321 to adjust the sliding block 31 and the first blocking member 21. Even if the second adjusting member 321 is driven by a mechanical device, the mechanical device can be placed outside the die body 10. Such a setting mode can facilitate the installation of the mechanical device.

[0130] In order to facilitate the display of the range of the second adjusting member 321, please refer to Figure 6 and Figure 7 , the range of the second adjusting member 321 is indicated by a dashed line in the figure. It should be noted that the dashed line only facilitates the display of the range of the second adjusting member 321 and does not represent any entity meaning.

[0131] In the embodiment, the second adjusting member 321 provided in the second blocking member 22 and having one end located in the first pipe body 411 or the second pipe body 412 is used as part of the driving mechanism 32. Thus, an operator can adjust the sliding block 31 outside the second blocking member 22 by using the second adjusting member 321. Since one end of the second adjusting member 321 is located in the first pipe body 411 or the second pipe body 412, the first pipe body 411 and the second pipe body 412 can protect the structure of the second adjusting member 321, and the risk of accidental touch of the second adjusting member 321 is reduced.

[0132] Please refer to Figure 3 and Figure 4 , and refer toFigure 6 and Figure 7 According to some embodiments of the present application, the second adjusting member 321 comprises a first body 321A and a second body 321B, the first body 321A is connected to the slider 31 at one end of the first body 321A penetrating the second blocking member 22, and the other end of the first body 321A has a second threaded hole, and the second body 321B is rotationally arranged in the first tube body 411 and is threadedly connected with the second threaded hole.

[0133] The first body 321A and the second body 321B are two body parts of the second adjusting member 321.

[0134] The second body 321B is rotationally arranged in the first tube body 411 and is threadedly connected with the second threaded hole, specifically, when the second body 321B is rotated, the first body 321A will translate along its length direction, since the other end of the first body 321A is rotationally connected with the slider 31, when the first body 321A translates, the slider 31 will move along the length direction of the cavity 101, if the first body 321A and the slider 31 move along the N1 direction, the first blocking member 21 will move along the N3 direction to the first position, if the first body 321A and the slider 31 move along the N2 direction, under the action of gravity, the first blocking member 21 will move along the N4 direction to the second position.

[0135] It can be understood that the second body 321B can not move along its axial direction relative to the first tube body 411.

[0136] In the present embodiment, since the second body 321B is threadedly connected with the second threaded hole, on the one hand, when the second body 321B is rotated, the first body 321A will move along its axial direction relative to the second body 321B, since one end of the first body 321A is rotationally connected with the slider 31, when the first body 321A moves along its axial direction, the slider 31 will slide along the first direction X with the first body 321A to adjust the effective length of the cavity 101, on the other hand, since the threaded connection has a certain self-locking ability, when the first blocking member 21 moves to the second position, the second body 321B can limit the first body 321A to move along its axial direction to limit the slider 31 to move along the first direction X, and further limit the first blocking member 21 to move to the second position.

[0137] Please refer to Figure 8 , Figure 8 for Figure 7A cross-sectional view of the B-B. According to some embodiments of the present application, the first blocking member 21 comprises a main body part 211 having two first sides 211A oppositely arranged in the third direction Z, and an elastic part 212 at least covering the first sides 211A of the main body part 211, the elastic part 212 being inflated to block the gap between the first sides 211A and the wall part of the cavity 101 in the third direction Z when the first blocking member 21 is in the first position, the first direction X, the second direction Y and the third direction Z being perpendicular to each other.

[0138] The main body part 211 is a part of the first blocking member 21 for transmission connection with the switching assembly 30. Exemplarily, the main body part 211 can be a metal piece to have higher strength and rigidity, so as to press the elastic part against the cavity wall of the cavity 101 when the first blocking member 21 is in the first position.

[0139] The elastic part 212 is a part of the first blocking member 21 for being inflated to block the gap between the main body part 211 and the cavity wall of the cavity 101 when the first blocking member 21 is in the first position. Exemplarily, the main body part 211 can be a non-metal piece such as rubber, so as to be inflated to block the gap between the first sides 211A and the wall part of the cavity 101 in the third direction Z when the first blocking member 21 is in the first position.

[0140] The first sides 211A are two surfaces of the main body part 211 oppositely arranged in the third direction Z.

[0141] Exemplarily, the first direction X can be parallel to the length direction of the die body 10, the second direction Y can be parallel to the width direction of the die, and the third direction Z can be parallel to the height direction of the die body 10.

[0142] In the present embodiment, when the first blocking member 21 is in the first position, the elastic part 212 is inflated to block the gap between the first sides 211A and the wall part of the cavity 101 in the third direction Z, so as to improve the sealing between the blocking assembly 20 and the wall part of the cavity 101 when the first blocking member 21 is in the first position.

[0143] Please refer to Figure 8 According to some embodiments of the present application, the two sides of the accommodating cavity 221 oppositely arranged in the third direction Z both have third guide surfaces, the third guide surfaces being used to guide the elastic part 212 to be inflated in the direction close to the wall part of the cavity 101 in the third direction Z when the first blocking member 21 is switched from the second position to the first position.

[0144] The third guide surface is a part of the surface arranged on the two sides of the accommodating cavity 221 oppositely arranged in the third direction Z.

[0145] The two opposite sides of the accommodating cavity 221 in the third direction Z are provided with third guide surfaces, which are inclined away from each other in a direction away from the slider 31.

[0146] In some embodiments, the two opposite outer surfaces of the second blocking member 22 in the third direction Z are adjacent to the two third guide surfaces, respectively.

[0147] Exemplarily, the third guide surfaces can be planar or curved.

[0148] In the present embodiment, when the first blocking member 21 is switched from the second position to the first position, the third guide surfaces are used to guide the elastic part 212 to expand towards the wall of the cavity 101 in the third direction Z, so as to reduce the step surface between the first blocking member 21 and the second blocking member 22, so that there is a gap between the elastic part and the second blocking member 22, which may cause the sealing performance of the blocking assembly 20 to be reduced.

[0149] According to some embodiments of the present application, the main body part 211 has a second side 211B in the second direction Y outside the accommodating cavity 221, which is adjacent to the first side 211A, and the elastic part 212 covers the second side 211B.

[0150] The second side 211B is the surface of the main body part 211 in the first direction X away from the slider 31.

[0151] In some embodiments, the first blocking member 21 has a avoiding part 21B in the second direction Y for avoiding the internal mechanical structure of the die body 10.

[0152] In the present embodiment, the elastic part 212 covers the second side 211B, so as to reduce the risk of scratching the inner wall of the cavity 101 when the first blocking member 21 moves in the first direction X relative to the cavity 101.

[0153] The present application also provides a coating device comprising the coating die 100 described above.

[0154] According to some embodiments of the present application, referring to Figures 1 to 8As shown, the present application provides a coating die 100 for coating slurry on a substrate, which comprises a die body 10, a blocking assembly 20 and a switching assembly 30. The die body 10 has a cavity 101 therein, the blocking assembly 20 comprises a first blocking member 21 and a second blocking member 22, the first blocking member 21 has a first position and a second position, the first blocking member 21 is configured to: in the first position and the second blocking member 22 completely block a portion of the cavity 101 in a first direction X, in the second position and the second blocking member 22 partially block the portion of the cavity 101 in the first direction X, the first direction X is parallel to the length direction of the die body 10. The switching assembly 30 is configured to drive the first blocking member 21 to switch between the second position and the first position, so as to adjust the effective length of the cavity 101 to adapt to the width of the substrate, the effective length being the length of the portion of the cavity 101 containing the slurry in the first direction X.

[0155] The second blocking member 22 is internally formed with a containing cavity 221 having an opening 222, the side of the second blocking member 22 in a second direction Y is formed with the opening 222 for the first blocking member 21 to pass through, at least a portion of the first blocking member 21 is located in the containing cavity 221, in the first position, the volume of the portion of the first blocking member 21 located outside the containing cavity 221 is the largest, and the first direction X is perpendicular to the second direction Y.

[0156] The switching assembly 30 comprises a slider 31 and a driving mechanism 32, the slider 31 is movably arranged in the containing cavity 221 along the first direction X, and the driving mechanism 32 is configured to drive the slider 31 to move along the first direction X. One of the slider 31 and the first blocking member 21 has a first guide surface 21A, the slider 31 moves along the first direction X to make the first guide surface 21A guide the first blocking member 21 to move along the second direction Y to the first position, and the second direction Y is parallel to the direction of gravity.

[0157] The side of the first blocking member 21 facing the slider 31 has the first guide surface 21A, and the side of the slider 31 facing the first blocking member 21 has a second guide surface 31A parallel to the first guide surface 21A. The switching assembly 30 further comprises a rotating shaft 311, the rotating shaft 311 is rotatably arranged on the second guide surface 31A, the circumferential side of the rotating shaft 311 is used to abut against the first guide surface 21A, and the rotation axis of the rotating shaft 311, the first direction X and the second direction Y are perpendicular to each other in pairs. A plurality of rotating shafts 311 are arranged in a direction perpendicular to the rotation axis thereof.

[0158] The coating die 100 further comprises an adjusting mechanism 40 connected to the second blocking member 22, the adjusting mechanism 40 being used to adjust the position of the blocking assembly 20 in the first direction X to change the effective length of the cavity 101 when the first blocking member 21 is located at the first position. The adjusting mechanism 40 comprises a first adjusting member 41, one end of the first adjusting member 41 being connected to the second blocking member 22, the first end of the cavity 101 in the first direction X having a first through hole for the first adjusting member 41 to pass through, the other end of the first adjusting member 41 being located outside the die body 10.

[0159] The adjusting mechanism 40 further comprises a fixing block provided at the first end of the die body 10 and having a first threaded hole coaxially provided and communicated with the first through hole; the first adjusting member 41 comprises a first tube body 411 and a second tube body 412, one end of the first tube body 411 being connected to the second blocking member 22, the other end of the second tube body 412 being rotationally provided in the first tube body 411, the second tube body 412 being threadedly connected with the first threaded hole.

[0160] The fixing block is provided with scale lines for indicating the effective length of the cavity 101.

[0161] The driving mechanism 32 comprises a second adjusting member 321, the second adjusting member 321 being provided through the second blocking member 22, one end of the second adjusting member 321 being connected to the sliding block 31, the other end of the second adjusting member 321 being located in the first tube body 411 or the second tube body 412.

[0162] The second adjusting member 321 comprises a first body 321A and a second body 321B, one end of the first body 321A being connected to the sliding block 31, the other end of the first body 321A having a second threaded hole, the second body 321B being rotationally provided in the first tube body 411 and threadedly connected with the second threaded hole.

[0163] The first blocking member 21 comprises a main body 211 and an elastic part 212, the main body 211 having two first sides 211A oppositely provided in the third direction Z, the elastic part 212 being at least wrapped on the first side 211A of the main body 211, the elastic part 212 being inflated to block the gap between the first side 211A and the wall part of the cavity 101 in the third direction Z when the first blocking member 21 is located at the first position, the first direction X, the second direction Y and the third direction Z being perpendicular to each other.

[0164] The accommodating cavity 221 has a third guide surface on each of the two sides oppositely provided in the third direction Z, the third guide surface being used to guide the elastic part 212 to expand in the direction close to the wall part of the cavity 101 in the third direction Z when the first blocking member 21 is switched from the second position to the first position.

[0165] The main body part 211 has a second side 211B outside the accommodating cavity 221 in the second direction Y, the second side 211B is adjacent to the first side 211A, and the elastic part 212 covers the second side 211B.

[0166] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0167] The above embodiments are only used to illustrate the technical solutions of the present application and are not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A coating die for coating a substrate with a slurry, characterized by, The coating die comprises: a die body having a cavity therein; a blocking assembly comprising a first blocking member and a second blocking member, the first blocking member having a first position and a second position, the first blocking member being configured to completely block a portion of the cavity in a first direction in the first position and the second position, and to partially block the portion of the cavity in the first direction in the second position; a switching assembly configured to drive the first blocking member to switch between the second position and the first position, so as to adjust an effective length of the cavity to adapt to a width of the substrate, the effective length being a length of a portion of the cavity containing slurry in the first direction.

2. The coating die of claim 1, wherein The second blocking member has a receiving cavity with an opening formed therein, a side of the second blocking member in a second direction has the opening formed therein for the first blocking member to pass through, at least a portion of the first blocking member is located in the receiving cavity, in the first position, a volume of a portion of the first blocking member located outside the receiving cavity is maximum, and the first direction is perpendicular to the second direction.

3. The coating die of claim 2, wherein The switching assembly comprises a slider movably arranged in the receiving cavity in the first direction, and a driving mechanism configured to drive the slider to move in the first direction; one of the slider and the first blocking member has a first guide surface, the first guide surface is configured to guide the first blocking member to move in the second direction to the first position when the slider moves in the first direction.

4. The coating die of claim 3, wherein In the second direction, a side of the first blocking member facing the slider has the first guide surface, and a side of the slider facing the first blocking member has a second guide surface parallel to the first guide surface.

5. The coating die of claim 4, wherein The switching assembly further comprises a rotating shaft rotatably arranged on the second guide surface, a circumferential side of the rotating shaft is configured to abut against the first guide surface, and an axis of rotation of the rotating shaft, the first direction and the second direction are perpendicular to each other.

6. The coating die of claim 5, wherein A plurality of rotating shafts are arranged in a direction perpendicular to the axis of rotation of the rotating shafts.

7. The coating die of claim 3, wherein The coating die further comprises: an adjusting mechanism connected to the second blocking member, the adjusting mechanism being configured to adjust a position of the blocking assembly in the first direction to change the effective length of the cavity when the first blocking member is in the first position.

8. The coating die of claim 7, wherein The adjusting mechanism comprises a first adjusting member, one end of the first adjusting member is connected to the second blocking member, a first end of the cavity in the first direction has a first through hole for the first adjusting member to pass through, and the other end of the first adjusting member is located outside the die body.

9. The coating die of claim 8, wherein The adjusting mechanism further comprises a fixing member arranged at the first end of the die body and having a first threaded hole coaxially arranged with and communicating with the first through hole. The first adjusting member comprises a first tube body and a second tube body, one end of the first tube body is connected with the second blocking member, one end of the second tube body is rotationally arranged at the other end of the first tube body, and the second tube body is threadedly connected with the first threaded hole.

10. The coating die of claim 9, wherein The fixing member is provided with a scale line for indicating the effective length of the cavity.

11. The coating die of claim 9, wherein The driving mechanism comprises a second adjusting member, the second adjusting member is arranged through the second blocking member, one end of the second adjusting member is connected with the sliding block, and the other end of the second adjusting member is located in the first tube body or the second tube body.

12. The coating die of claim 11 wherein, The second adjusting member comprises a first body and a second body, the first body is arranged through the second blocking member, one end of the first body is connected with the sliding block, the other end of the first body is provided with a second threaded hole, the second body is rotationally arranged in the first tube body and is threadedly connected with the second threaded hole.

13. The coating die of any one of claims 2-12, wherein, The first blocking member comprises a main body part and an elastic part, the main body part has two oppositely arranged first sides in the third direction, the elastic part at least covers the first side of the main body part, when the first blocking member is located at the first position, the elastic part is expanded to block the gap between the first side and the wall part of the cavity in the third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

14. The coating die of claim 13, wherein The two sides of the accommodating cavity in the third direction are both provided with third guide surfaces, when the first blocking member is switched from the second position to the first position, the third guide surfaces are used for guiding the elastic part to expand in the direction close to the wall part of the cavity in the third direction.

15. The coating die of claim 13, wherein The main body part has a second side located outside the accommodating cavity in the second direction, the second side is adjacent to the first side, and the elastic part covers the second side.

16. A coating apparatus characterized by comprising: The coating die comprises the coating die according to any one of claims 1-15.

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