Gap coating device and gap coating method

Abstract

The invention provides a clearance coating device, which is used for coating slurry on a base material arranged on a coating roller, and comprises a rack, a die head, a retreating assembly and a clearance adjusting assembly, the die head is provided with a first sliding block capable of sliding in the first direction and a mounting table spaced from the first sliding block in the first direction, the die head is fixedly connected with the mounting table, and the first sliding block is provided with a first surface and a second surface which are opposite in the first direction. The retreating assembly is provided with a first extending part capable of getting close to or away from the second surface. The gap adjusting assembly is provided with a position-adjustable second extending part, one end of the second extending part is in contact with the first surface, and the other opposite end of the second extending part is connected with the mounting table; the position of the second extending part can be adjusted so that the second extending part can make contact with the first surface and push the first sliding block to move till the second surface makes contact with the first extending part. The retreating assembly is configured in the mode that the first extending part can apply force to the second surface and push the first sliding block so that the die head can be away from the coating roller in the first direction.

Description

Technical Field

[0001] The present application relates to the technical field of coating processes, and in particular to a gap coating device and a gap coating method. Background Art

[0002] In the existing gap coating device for the catalytic layer, the die head needs to retreat after a period of coating work, and then move forward to the working position to perform coating work to achieve gap coating of the catalytic coating. In the existing gap coating device (such as the Chinese patent with publication number CN115999845A), during the process of the die head retreating, after its retreat mechanism receives the working instruction, the second matching part needs to move downward for a certain distance before it contacts the first matching part. Therefore, there is a certain time difference between the system issuing the working instruction to retreat the die head and the die head starting to retreat. During this time difference, the die head is still coating the slurry on the substrate, so it is difficult to achieve precise control of the size of the interval coating and good coating quality. Summary of the invention

[0003] The purpose of the present application is to provide a gap coating device and a gap coating method, which can improve the dimensional accuracy of the coating by enabling the die head to retract in time.

[0004] The embodiment of the present application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a gap coating device for coating a substrate disposed on a coating roller with a slurry, comprising a frame, a die head, a retraction assembly, and a gap adjustment assembly.

[0006] The die head is slidably arranged on the frame, and the die head is used to apply slurry to a substrate arranged on the coating roller; the die head is provided with a first slider that can slide along a first direction, and a mounting platform that is spaced apart from the first slider in the first direction, the die head is fixedly connected to the mounting platform, and the first slider has a first surface and a second surface that are opposite to each other in the first direction.

[0007] The retracting component is disposed on the frame, and the retracting component has a first protruding portion that can be close to or away from the second surface.

[0008] The gap adjustment component is arranged on the die head, and the gap adjustment component has a second protruding portion with adjustable position, one end of the second protruding portion contacts the first surface, and the other opposite end of the second protruding portion is connected to the mounting table; the second protruding portion is configured to be able to adjust the position so that the second protruding portion contacts the first surface and pushes the first slider to move until the second surface contacts the first protruding portion.

[0009] The retraction assembly is configured such that the first protruding portion can apply force to the second surface and push the first slider, so that the die head moves away from the coating roller along the first direction.

[0010] In the above technical solution, the first surface and the second surface are two surfaces of the first slider that are opposite to each other in the first direction. Since the first extension is in contact with the first surface of the first slider, one end of the second extension is in contact with the second surface of the first slider, and the other end of the second extension is connected to the mounting platform, the first extension, the second extension of the first slider and the mounting platform are in contact in sequence in the first direction. When the first extension is extended downward, the first extension can apply force to the second surface and push the first slider for the first time. Accordingly, the second extension and the mounting platform also move simultaneously to move the die head away from the coating roller in the first direction. It is not difficult to understand that in the above technical solution, when the retraction mechanism receives a working instruction to retract the die head and extends the first extension, the die head retracts immediately, thereby making the coating have a higher dimensional accuracy.

[0011] In addition, when the coating thickness increases, the distance between the die head and the coating roller will increase, and accordingly, the position of the mounting platform will also change with the position of the die head, so that a gap will appear between the first extension and the first slider, or between the first slider and the second extension, or between the second extension and the mounting platform. In the above technical solution, since the position of the second extension is adjustable, after the coating thickness changes, the position of the second extension can be adjusted to make the second extension contact with the first surface and push the first slider to move until the second surface contacts the first extension, so that when the first extension exerts force on the first slider, the die head can be retracted in time.

[0012] In some optional embodiments, the cross-section of the first slider is a first trapezoid, the surface where one waist of the first trapezoid is located is the first surface, the surface where the other waist of the first trapezoid is located is the second surface, and the dimension of the first slider at one end close to the die head in the first direction is wider.

[0013] The first sliding block adopts the structure in the above embodiment, and can be easily pushed by the first extending portion and the second extending portion.

[0014] In some optional embodiments, the cross-section of the second extension portion is a second trapezoid, one waist of the second trapezoid is in contact with the first surface, and the other waist of the second trapezoid is in contact with the mounting platform; and in the first direction, the dimension of the second extension portion close to one end of the die head is smaller, so that the second extension portion can push the first slider to move toward the first extension portion during the movement of the second extension portion toward the die head.

[0015] In the above technical solution, the cross-sections of the first slider and the second extension are both trapezoidal, the first slider and the second extension are in surface contact, which can better transmit the force, and the size of the second extension close to the die head end is smaller, which can facilitate the second extension to be extended between the first slider and the mounting platform and push the first slider to move toward the first extension.

[0016] In some optional embodiments, the second extension portion and the first slider are slidably connected via a matching slide groove structure and a guide rail structure; the slide groove structure is disposed on one of the second extension portion and the first slider, and the guide rail structure is disposed on the other of the second extension portion and the first slider.

[0017] In the above technical solution, a sliding groove structure and a guide rail structure are used to achieve a sliding connection between the second extension part and the first slider, so that when the second extension part moves in a direction away from the die head, it can also drive the first slider to move in a direction away from the first extension part, so that a gap appears between the first slider extension part and the first slider, and then the die head can be moved in a direction close to the coating roller, thereby reducing the coating thickness.

[0018] In some optional embodiments, the second extension portion is a rod-shaped structure extending along the first direction, one end of the rod-shaped structure is movably connected to the mounting platform, and the other end is in contact with the second surface, and the rod-shaped structure moves along the first direction on the mounting platform to push the first slider to contact the first extension portion.

[0019] In the above technical solution, the second extension part extends along the first direction, and can more conveniently apply a force to the first slider, so that the first slider moves along the first direction until it contacts the first extension part. The second extension part is connected to the mounting platform, and can transmit the force applied by the first extension part to the mounting platform, and then to the die head, so that the die head can be retracted in time.

[0020] In some optional embodiments, the gap adjustment assembly includes a micrometer fine-tuning mechanism, and the second extension portion is located on a screw of the micrometer fine-tuning mechanism to change the movement distance of the second extension portion.

[0021] In the above technical solution, the screw in the micrometer fine-tuning mechanism can be extended and retracted by rotating the knob in the micrometer fine-tuning mechanism. Since the second extension is located on the screw of the micrometer fine-tuning mechanism, the movement distance of the second extension can be adjusted more accurately. In addition, the micrometer fine-tuning mechanism also has a self-locking function, so that when the first extension is extended downward and the second extension is squeezed, the second extension is not prone to position change, so that the die head can be retracted in time while the first extension is extended.

[0022] In some optional embodiments, the gap coating device has a first working state and a second working state; the micrometer fine-adjustment mechanism is provided with a reference line, a first mark and a second mark; in the first working state, the distance between the die head and the coating roller is a first distance, and the first mark is aligned with the reference line so that the first slider realizes that the second surface contacts the first extension portion in the first position; in the second working state, the distance between the die head and the coating roller is a second distance, and the second mark is aligned with the reference line so that the first slider realizes that the second surface contacts the first extension portion in the second position.

[0023] In the above technical solution, the gap coating device has different distances from the coating roller in different working states, that is, the gap coating device can perform coating processes of different sizes and thicknesses. Since the micrometer fine adjustment mechanism is provided with a first mark, a second mark and a reference line, and the first mark is aligned with the reference line in the first working state, and the second reference line is aligned with the reference line in the second working state, after changing the coating thickness, the first slider can be quickly adjusted to a state where the second surface contacts the first extension portion through the gap adjustment mechanism by aligning the corresponding first mark or second mark with the reference line.

[0024] In some optional embodiments, the retraction assembly further includes a driving member, the first protruding portion is a roller rotatably connected to the driving member, and the driving member is used to drive the roller to move toward the die head; the circumferential surface of the roller is in contact with the second surface.

[0025] In the above technical solution, the first extension part is a roller, and the circumferential surface of the roller is in contact with the second surface. Therefore, when the driving member drives the first extension part to move toward the die head, the first extension part applies a force to the second surface while rolling along the second surface, which can reduce the resistance encountered by the first extension part in moving toward the die head, so as to more easily push the die head back in the direction away from the coating roller.

[0026] In some optional embodiments, it also includes a forward mechanism for driving the die head to move toward the coating roller, and a first positioning block and a second positioning block, wherein the first positioning block and the second positioning block are used for positioning the die head during the movement toward the coating roller.

[0027] The first positioning block is arranged on the frame and can be selectively located at the third position or the fourth position, and the second positioning block is fixedly arranged on the die head; when the first positioning block is at the third position, the second positioning block contacts the first positioning block so that the die head is located at the first position; when the first positioning block is at the fourth position, the second positioning block contacts the first positioning block so that the die head is located at the second position.

[0028] In the above technical solution, by movably setting the first positioning block on the frame and fixing the second positioning block on the die head, it can be achieved that when the first positioning block is in the third position, the die head is in the first position; when the first positioning block is in the fourth position, the die head is in the second position. By changing the position of the first positioning block, the die head can be placed in different positions to form coatings of different thicknesses on the substrate.

[0029] In a second aspect, an embodiment of the present application provides a gap coating method, which is implemented by using the gap coating device provided in the first aspect, adjusting the relative position of the die head and the coating roller before production, and then making the first extension part and the second surface in contact with each other through the gap adjustment component;

[0030] When retreat is required, the first extending portion is controlled to apply force to the second surface so that the die head moves away from the coating roller along the first direction.

[0031] In the above technical solution, the first extension part and the first slider are adjusted to a state where the first extension part and the second surface of the first slider are in contact with each other before production. Therefore, when the first extension part applies a force to the first slider, the die head can be retracted in time, thereby improving the dimensional accuracy of the coating.

[0032] In a third aspect, an embodiment of the present application provides a gap coating method, which is implemented using the gap coating device provided in the optional implementation scheme of the first aspect, including:

[0033] The die head is adjusted from the first position to the second position, and the micrometer fine-adjustment mechanism is adjusted to align the second mark on the screw with the reference line, thereby driving the first slider to move to the position where the second surface contacts the first extension portion, so as to adjust the gap coating device from the first working state to the second working state.

[0034] In the above technical solution, if the gap coating device is to be adjusted from the first working state to the second working state, the distance between the die head and the coating roller will change, and accordingly, the first slider will also move with the die head, and the relative position between the first slider and the first extension will change. By aligning the second mark on the screw with the reference line, when the gap coating device needs to be adjusted to the second working state, the first slider can be quickly adjusted to a state where the second surface contacts the first extension through the second slider. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 It is a schematic structural diagram of a gap coating device in the prior art;

[0037] Figure 2 A schematic diagram of a gap coating device provided in one embodiment of the present application;

[0038] Figure 3 A schematic diagram of a gap coating device provided in another embodiment of the present application.

[0039] Icons: 100-coating roller; 210-die head; 220-first slider; 221-first surface; 222-second surface; 230-mounting table; 300-retraction assembly; 310-first extension; 320-driving member; 400-gap adjustment assembly; 410-second extension; 420-micrometer fine-tuning mechanism; 421-screw; 422-ring; 423-knob; 430-bracket. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0042] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0043] In the description of this application, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the application is usually placed when in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as a limitation on this application. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0044] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0045] In the description of this application, it should also be noted that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0046] The applicant found that the existing Chinese patent with publication number CN115999845A has the problem of untimely die head retraction during implementation, that is, there is a certain time difference between the system issuing the work instruction to retract the die head and the die head starting to retract, which makes the dimensional accuracy of the coating in the length direction of the substrate low. Figure 1 As shown, the causes of this problem include: after working for a period of time, a gap appears between the second matching part and the first matching part; after increasing the thickness of the coating or substrate for production, the die head needs to move away from the coating roller, thus causing a gap between the second matching part and the first matching part.

[0047] Based on this, an embodiment of the present application provides a gap coating device for coating a substrate disposed on a coating roller 100 with slurry during a coating process, so as to form a coating with high dimensional accuracy on the substrate.

[0048] like Figure 2 and Figure 3 As shown, the gap coating device includes a frame, a die head 210, a retracting assembly 300, and a gap adjusting assembly 400. The die head 210 is slidably disposed on the frame, and is used to intermittently coat the slurry onto the substrate disposed on the coating roller 100.

[0049] The die head 210 is provided with a plurality of Figure 2 and Figure 3 The die head 210 is also fixed with a mounting platform 230 connected to the die head 210. The first slider 220 and the mounting platform 230 are spaced apart in the first direction, that is, the first slider 220 and the mounting platform 230 are spaced apart in the first direction but not in direct contact. The first slider 220 has a first surface 221 and a second surface 222 that are opposite to each other in the first direction.

[0050] The retraction assembly 300 is disposed on the frame and has a first extension portion 310 that can be close to or away from the second surface 222. That is, in some working processes, the first extension portion 310 can move in a direction close to the second surface 222, and in other working processes, the first extension portion 310 can move in a direction away from the second surface 222.

[0051] The gap adjustment assembly 400 is arranged on the die head, and the gap adjustment assembly 400 has a second extension portion 410 with adjustable position, one end of the second extension portion 410 contacts the first surface 221, and the other opposite end of the second extension portion 410 is connected to the mounting table 230; the second extension portion 410 is configured to be able to adjust the position so that the second extension portion 410 contacts the first surface 221 and pushes the first slider 220 to move to the second surface 222 to contact the first extension portion 310.

[0052] The first extension 310 can push the first slider 220 when applying force to the second surface 222, so that the die head 210 is away from the coating roller 100 along the first direction. It is not difficult to understand that, since the first surface 221 of the first slider 220 contacts one end of the second extension 410, the other opposite end of the second extension 410 is connected to the mounting platform 230, and the mounting platform 230 is fixedly connected to the die head 210, when the die head 210 is driven away from the coating roller 100 by the first extension 310, the connection between the second extension 410 and the mounting platform 230 is a connection mode that can transmit force, such as the second extension 410 and the mounting platform 230 are fixedly connected, or are in contact with each other in the first direction.

[0053] Furthermore, since the position of the second extension 410 is adjustable so that the second extension 410 contacts the first surface 221 and pushes the first slider 220 to move until the second surface 222 contacts the first extension 310, and the other end of the second extension 410 is connected to the mounting platform 230, the second extension 410 can be adjusted to achieve no gap between the first extension 310 and the first slider 220 in the first direction, no gap between the first slider 220 and the second extension 410 in the first direction, and no gap between the second extension 410 and the mounting platform 230 in the first direction. In this state, the first extension 310 applies force to the second surface 222 and pushes the first slider 220, so that the die head 210 moves away from the coating roller 100 along the first direction. In this process, the first extension 310, the first slider 220, the second extension 410, the mounting platform 230 and the die head 210 move simultaneously, thereby making the coating have a higher dimensional accuracy in the length direction of the substrate.

[0054] In addition, if the thickness of the coating or substrate to be produced is to be increased, the die head 210 needs to move away from the coating roller 100, which in turn drives the first slider 220 to move away from the coating roller 100, so that the first slider 220 is separated from the first extension 310. Since the position of the second extension 410 is adjustable, the position of the second extension 410 can be adjusted to push the first slider 220 to a position where the second surface 222 contacts the first extension 310 again.

[0055] In some embodiments, the cross section of the first slider 220 is a first trapezoid, the surface where one waist of the first trapezoid is located is the first surface 221, and the surface where the other waist of the first trapezoid is located is the second surface 222. In the first direction, the dimension of the end of the first slider 220 close to the die head 210 is wider, that is, Figure 2 and Figure 3 As shown, the portion of the first slider 220 close to the die head 210 has a larger size in the first direction. In this embodiment, the second surface 222 is an inclined surface. Figure 2 As shown, the first extension portion 310 can move in a direction perpendicular to the first direction to apply a force to the second surface 222, or can move in a direction parallel to the first direction to apply a force to the second surface 222. In this embodiment, the arrangement of the retracting component 300 and the first extension portion 310 is more flexible and diverse. Figure 2 or Figure 3 As shown, the above cross section is a cross section parallel to the first direction and parallel to the vertical plane.

[0056] In some other embodiments, the first slider 220 may also be a structure with a rectangular cross-section. Accordingly, the first protruding portion 310 may apply a force to the second surface 222 of the first slider 220 along the first direction.

[0057] Further, in some embodiments, only one first extension portion 310 may be provided, or two or more first extension portions 310 may be provided. In the embodiment where only one first extension portion 310 is provided, the first extension portion 310 is provided at a position passing through the symmetry plane of the die head 210, wherein the symmetry plane of the die head 210 is a vertical plane parallel to the first direction; when the first extension portion 310 passing through the symmetry plane of the die head 210 applies a force to the first slider 220, the force on the die head 210 is more uniform, and the die head 210 can be better retracted. When there are two or more first extension portions 310, the first extension portions 310 may be evenly distributed in the horizontal direction and in a direction perpendicular to the first direction, so that the force on the die head 210 is more uniform.

[0058] Accordingly, in some embodiments, such as embodiments in which there are two or more first extension portions 310, the first slider 220 may be a long columnar structure with a trapezoidal cross section, or the first slider 220 may be provided in two or more correspondingly. In other embodiments, such as embodiments in which there is only one first extension portion 310, the first slider 220 may be a block structure with a trapezoidal cross section.

[0059] In some embodiments, the cross section of the second extension 410 is a second trapezoid, one waist of the second trapezoid contacts the first surface 221, and the other waist of the second trapezoid contacts the mounting platform 230; and in the first direction, the dimension of the second extension 410 near the die head 210 is smaller, so that when the second extension 410 moves toward the die head 210, the first slider 220 is pushed to move toward the first extension 310. In this embodiment, the cross sections of the first slider 220 and the second extension 410 are both trapezoidal, such as Figure 2 As shown, the second extension portion 410 can move perpendicularly to the first direction toward or away from the die head 210, and therefore occupies a smaller space in the first direction; and the first slider 220 and the second extension portion 410 can be in surface contact, which can better transmit the force, and the size of the second extension portion 410 near the die head 210 is smaller, which can facilitate the second extension portion 410 to be inserted between the first slider 220 and the mounting platform 230 and push the first slider 220 to move toward the first extension portion 310.

[0060] Furthermore, the second extension 410 and the first slider 220 are slidably connected by means of a slide groove structure and a guide rail structure that cooperate with each other. The slide groove structure and the guide rail structure are used to realize the sliding connection between the first slider 220 and the second extension 410, so that when the second extension 410 moves in a direction away from the die head 210, it can also drive the first slider 220 to move in a direction away from the first extension 310, so that a gap appears between the first extension 310 and the first slider 220, so as to facilitate the die head 210 to move in a direction close to the coating roller 100, thereby reducing the coating thickness. In some embodiments, the slide groove structure can be provided on the second extension 410 and the guide rail structure can be provided on the first slider 220, or the slide groove structure can be provided on the first slider 220 and the guide rail structure can be provided on the second extension 410.

[0061] In some other embodiments, the second extension portion 410 may also move in a direction parallel to the first direction. Figure 3 As shown, the second extension 410 is a rod-shaped structure extending in the first direction, one end of the rod-shaped structure is movably connected to the mounting platform 230, and the other end is in contact with the second surface 222. The rod-shaped structure is arranged on the mounting platform 230 and can move in the first direction to push the first slider 220 to contact the first extension 310. Among them, one end of the rod-shaped structure is movably connected to the mounting platform 230 so that the rod-shaped structure can move relative to the mounting platform 230, and also so that the rod-shaped structure can be fixed relative to the mounting platform 230. In the case that the rod-shaped structure can move relative to the mounting platform 230, the position of the first slider 220 can be adjusted; in the case that the rod-shaped structure can be fixed relative to the mounting platform 230, the force applied by the first extension 310 can be transmitted to the mounting platform 230, so that the mounting platform 230 drives the die head 210 to move.

[0062] Furthermore, in order to facilitate fine-tuning of the position of the first slider 220 and thus more accurately adjust the movement distance of the second extension 410, the gap adjustment assembly 400 includes a micrometer fine-tuning mechanism 420, and the second extension 410 is located on a screw 421 of the micrometer fine-tuning mechanism 420 to change the movement distance of the second extension 410. Among them, the micrometer fine-tuning mechanism 420 is a component mechanism in an existing micrometer or a micrometer screw, and includes a screw 421, a collar 422, and a knob 423 from the inside to the outside. The extension and retraction of the screw 421 can be achieved by rotating the knob 423, thereby achieving the movement of the second extension 410. Scale lines are provided on the collar 422 and the knob 423 for reading. Further, in this embodiment, the collar 422 can be directly connected to the mounting table 230, or it can be Figure 2 and Figure 3The bracket 430 is shown as being connected to the mounting platform 230. By connecting the collar 422 to the mounting platform 230, the movable connection of the screw rod 421 relative to the mounting platform 230 is achieved, that is, one end of the aforementioned rod-like structure is movably connected to the mounting platform 230.

[0063] The second extension portion 410 is located at the screw rod 421, including an embodiment in which the second extension portion 410 is connected to the screw rod 421, such as Figure 2 As shown, the second extension portion 410 is a second slider with a trapezoidal cross section, and the second extension portion 410 is connected to the end of the screw rod 421. The second extension portion 410 is located at the screw rod 421, which also includes an embodiment in which the second extension portion 410 is the end of the screw rod 421, such as Figure 3 As shown, the second extension portion 410 is the end of the screw rod 421 away from the mounting platform 230 .

[0064] In some embodiments, the gap coating device has a first working state and a second working state; the micrometer fine adjustment mechanism 420 is provided with a fixed reference line, a first mark and a second mark. In the first working state, the distance between the die head 210 and the coating roller 100 is the first distance, and the first mark is aligned with the reference line, so that the first slider 220 realizes the second surface 222 contacts the first extension 310 in the first position. In the second working state, the distance between the die head 210 and the coating roller 100 is the second distance, and the second mark is aligned with the reference line, so that the first slider 220 realizes the second surface 222 contacts the first extension 310 in the second position. It is not difficult to understand that in the first working state and the second working state, the distance between the die head 210 and the coating roller 100 is the first distance and the second distance respectively, and the thickness size of the coating or substrate is different from the first working state and the second working state. After changing the coating thickness, the first slider 220 can be quickly adjusted to the state where the second surface 222 contacts the first extension 310 through the gap adjustment mechanism by aligning the corresponding first mark or second mark with the reference line.

[0065] The reference line may be a mark set on the knob 423, and the first mark and the second mark are marks set on the collar 422. For example, in some embodiments, the reference line may be the edge of the knob 423 facing the side where the second extension 410 is located; the first mark and the second mark are two scale lines set along the axis of the collar 422. When the knob 423 is rotated, the edge of the knob 423 is aligned with the scale indicated by the first mark, and the first mark is aligned with the reference line; the edge of the knob 423 is aligned with the scale indicated by the second mark, and the second mark is aligned with the reference line. In other embodiments, the first mark and the second mark may also be notches set on the screw 421 along the axial direction of the screw 421, and the reference line is the edge of the collar 422 facing the side where the screw 421 extends.

[0066] Further, in some embodiments of the present application, the retraction assembly 300 further includes a driving member 320, and the first extension portion 310 is a roller rotatably connected to the driving member 320, and the driving member 320 is used to drive the roller to move toward the die head 210; the circumferential surface of the roller is in contact with the second surface 222. The roller is used as the first extension portion 310, and the roller is rotatably connected to the driving member 320. In the process of the driving member 320 driving the first extension portion 310 to move toward the die head 210, the first extension portion 310 applies a force to the second surface 222 while rolling along the second surface 222, which can reduce the resistance of the first extension portion 310 to move toward the die head 210, so as to more easily push the die head 210 to retract in the direction away from the coating roller 100.

[0067] In some embodiments, the driving member 320 is a first cylinder, and the first extension portion 310 is rotatably connected to the piston rod. Figure 2 In the embodiment shown, the piston rod of the first cylinder is arranged vertically. In other embodiments, the piston rod of the first cylinder may also be arranged along the first direction, or be arranged obliquely relative to the horizontal plane. In the embodiment in which the cylinder is used to drive the first extension 310 to move, due to the characteristics of the cylinder, its piston rod only has a fully extended state and a fully retracted state. It is not difficult to understand that when the piston rod of the first cylinder is fully extended, the die head 210 has completed the process of retreating away from the coating roller 100. When the piston rod of the first cylinder is fully retracted, the die head 210 is in the first position or the second position for the coating process. It can be seen that in the embodiment in which the cylinder is used as the driving member 320 to drive the first extension 310 to move, the driving member 320 can only play the role of retreating the die head 210. If it is to adapt to the production of coated strips of various thicknesses (the thickness of the coating or substrate is different), the driving member 320 needs to be disassembled and re-adjusted, and the operation process is complicated. On this basis, a cylinder is used as the driving member 320 to drive the first extension part 310 to move, and combined with the gap adjustment component 400, the die head 210 can be retracted more conveniently and simply through the cylinder, and it can also meet the needs of producing coated material strips of various thicknesses.

[0068] In some embodiments, the present invention further includes a forward mechanism for driving the die head 210 to move toward the coating roller 100, and a first positioning block and a second positioning block. The first positioning block and the second positioning block are used to position the die head 210 during the movement toward the coating roller 100, that is, when the first positioning block contacts the second positioning block, the die head 210 stops moving toward the coating roller 100 and stops at a position where the slurry can be coated on the substrate on the coating roller 100.

[0069] Further, the first positioning block is arranged on the frame and can be selectively located at the third position or the fourth position, and the second positioning block is fixedly arranged on the die head 210; when the first positioning block is at the third position, the second positioning block contacts the first positioning block, so that the die head 210 is located at the first position; when the first positioning block is at the fourth position, the second positioning block contacts the first positioning block, so that the die head 210 is located at the second position. It is not difficult to understand that by adjusting the first positioning block from the third position to the fourth position, the die head 210 changes from performing the coating process at the first position to performing the coating process at the second position, thereby realizing the production of coated strips of different thicknesses.

[0070] The present application also provides a gap coating method, which is implemented by the gap coating device provided in the above embodiment of the present application, so that the die head 210 can be retracted in time after the retraction mechanism is activated. Specifically, it includes: before production, the relative position of the die head 210 and the coating roller 100 is adjusted according to the thickness of the coating material strip to be produced, and then the first extension part 310 is in contact with the second surface 222 through the gap adjustment component 400; when retraction is required, the first extension part 310 is controlled to apply force to the second surface 222 (such as by moving the first extension part 310 toward the die head 210), so as to make the first slider 220, the second extension part 410, the mounting platform 230 and the die head 210 move synchronously, so as to achieve that the die head 210 is away from the coating roller 100 in time along the first direction.

[0071] The present application also provides a gap coating method that can be used to produce coated strips of different thicknesses. Accordingly, the gap coating device having the aforementioned die head 210 having a first working state and a second working state is used for implementation. The specific method includes: adjusting the die head 210 from the first position to the second position, and adjusting the micrometer fine-tuning mechanism 420 so that the second mark on the screw 421 is aligned with the reference line, and then driving the first slider 220 to move to the position where the second surface 222 contacts the first extension 310, so as to adjust the gap coating device from the first working state to the second working state. With this method, when the gap coating device needs to be adjusted to the second working state, the first slider 220 can be quickly adjusted to the state where the second surface 222 contacts the first extension 310 through the second slider by aligning the second mark on the screw 421 with the reference line.

[0072] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. 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 gap coating device for coating a substrate disposed on a coating roller with a slurry, characterized in that: include: frame, a die head slidably disposed on the frame, the die head being used to apply slurry to a substrate disposed on the coating roller; the die head being provided with a first slider slidable along a first direction, and a mounting platform spaced apart from the first slider in the first direction, the die head being fixedly connected to the mounting platform, the first slider having a first surface and a second surface opposite to each other in the first direction; A retraction component disposed on the frame, the retraction component having a first extension portion that can be close to or away from the second surface; A gap adjustment component is provided on the die head, the gap adjustment component has a position-adjustable second extension, one end of the second extension contacts the first surface, and the other opposite end of the second extension is connected to the mounting platform; the second extension is configured to adjust the position so that the second extension contacts the first surface and pushes the first slider to move until the second surface contacts the first extension; The retraction assembly is configured such that the first protruding portion can apply force to the second surface and push the first slider, so that the die head moves away from the coating roller along the first direction.

2. The gap coating device according to claim 1, characterized in that: The cross section of the first slider is a first trapezoid, the surface where one waist of the first trapezoid is located is the first surface, the surface where the other waist of the first trapezoid is located is the second surface, and the dimension of the first slider at one end close to the die head in the first direction is wider.

3. The gap coating device according to claim 2, characterized in that: The cross-section of the second extension portion is a second trapezoid, one waist of the second trapezoid is in contact with the first surface, and the other waist of the second trapezoid is in contact with the mounting table; and in the first direction, the dimension of the second extension portion close to one end of the die head is smaller, so that the second extension portion can push the first slider to move toward the first extension portion during the movement toward the die head.

4. The gap coating device according to claim 3, characterized in that: The second extension portion and the first slider are slidably connected via a sliding groove structure and a guide rail structure that cooperate with each other; the sliding groove structure is arranged on one of the second extension portion and the first slider, and the guide rail structure is arranged on the other of the second extension portion and the first slider.

5. The gap coating device according to claim 2, characterized in that: The second extension portion is a rod-shaped structure extending along the first direction, one end of the rod-shaped structure is movably connected to the mounting platform, and the other end contacts the second surface. The rod-shaped structure moves along the first direction on the mounting platform to push the first slider to contact the first extension portion.

6. The gap coating device according to any one of claims 1 to 5, characterized in that: The gap adjustment assembly includes a micrometer fine-tuning mechanism, and the second extension portion is located on a screw of the micrometer fine-tuning mechanism to change the movement distance of the second extension portion.

7. The gap coating device according to claim 6, characterized in that: The gap coating device has a first working state and a second working state; the micrometer fine-adjustment mechanism is provided with a reference line, a first mark and a second mark; in the first working state, the distance between the die head and the coating roller is a first distance, and the first mark is aligned with the reference line, so that the first slider realizes that the second surface contacts the first extension portion in the first position; in the second working state, the distance between the die head and the coating roller is a second distance, and the second mark is aligned with the reference line, so that the first slider realizes that the second surface contacts the first extension portion in the second position.

8. The gap coating device according to any one of claims 2 to 5, characterized in that: The retraction assembly also includes a driving member, the first protruding portion is a roller rotatably connected to the driving member, and the driving member is used to drive the roller to move toward the die head; the peripheral surface of the roller is in contact with the second surface.

9. A gap coating method, characterized in that: The gap coating device according to any one of claims 1 to 8 is used to adjust the relative position of the die head and the coating roller before production, and then the first extension portion is brought into contact with the second surface through the gap adjustment component; When retreat is required, the first extending portion is controlled to apply force to the second surface so that the die head moves away from the coating roller along the first direction.

10. A gap coating method, characterized in that: The gap coating device according to claim 7 is used to achieve the above, comprising: The die head is adjusted from the first position to the second position, and the micrometer fine-adjustment mechanism is adjusted to align the second mark on the screw with the reference line, thereby driving the first slider to move to the position where the second surface contacts the first extension portion, so as to adjust the gap coating device from the first working state to the second working state.

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