Gap coating device

Abstract

The utility model 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, in particular to a gap coating device. BACKGROUND

[0002] In the existing gap coating device for catalytic layer, the die needs to retreat after coating for a period of time, and then advance to the working position for coating to realize the gap coating of the catalytic coating. In the existing gap coating device (such as Chinese patent with publication number CN115999845A), during the retreat of the die, after the retreat mechanism receives the working instruction, the second matching part needs to move downward by a certain distance before contacting the first matching part. Therefore, there is a certain time difference between the working instruction for retreating the die and the start of retreating the die, and during this time difference, the die is still coating the slurry on the substrate, so it is difficult to realize the precise control of the size of the interval coating and good coating quality. CONTENT OF THE UTILITY MODEL

[0003] The purpose of the present application is to provide a gap coating device that can retreat the die in time to improve the size accuracy of the coating.

[0004] The embodiments of the present application are implemented as follows:

[0005] In a first aspect, the embodiments of the present application provide a gap coating device for coating a substrate provided on a coating roller with slurry, comprising a rack, a die, a retreat assembly and a gap adjustment assembly.

[0006] The die is slidingly arranged on the rack, and the die is used to coat the substrate provided on the coating roller with slurry; the die is provided with a first sliding block sliding in a first direction, and a mounting table spaced apart from the first sliding block in the first direction, the die is fixedly connected with the mounting table, and the first sliding block has a first surface and a second surface opposite in the first direction.

[0007] The retreat assembly is arranged on the rack, and the retreat assembly has a first extension part that can approach or move away from the second surface.

[0008] The gap adjustment assembly is arranged on the die, and the gap adjustment assembly has a second extension part with adjustable position, one end of the second extension part is in contact with the first surface, and the other end opposite in the second extension part is connected with the mounting table; the second extension part is configured to adjust the position so that the second extension part is in contact with the first surface and pushes the first sliding block to move to the second surface in contact with the first extension part.

[0009] The rollback assembly is configured such that the first extension portion can apply force to the second surface and push the first slider to make the die head move away from the coating roller in the first direction.

[0010] In the above technical solution, the first surface and the second surface are two surfaces opposite to each other in the first direction. Since the first extension portion is in contact with the first surface of the first slider, one end of the second extension portion is in contact with the second surface of the first slider, and the other end of the second extension portion is connected with the mounting table, in the first direction, the first extension portion, the first slider, the second extension portion and the mounting table are in contact in sequence. When the first extension portion extends downward, the first extension portion can apply force to the second surface and push the first slider at a first time. Correspondingly, the second extension portion and the mounting table also move at the same time to make the die head move away from the coating roller in the first direction. It is not difficult to understand that in the above technical solution, when the rollback mechanism receives the work instruction to make the die head rollback and the first extension portion extends, the die head immediately rolls back, thereby making the coating layer have higher dimensional accuracy.

[0011] In addition, in the case of increasing the coating thickness, the distance between the die head and the coating roller will increase, and accordingly, the position of the mounting table will change with the position of the die head, so that a gap will appear between the first extension portion and the first slider, or between the first slider and the second extension portion, or between the second extension portion and the mounting table. In the above technical solution, since the position of the second extension portion is adjustable, after the coating thickness is changed, the position of the second extension portion can be adjusted to make the second extension portion contact the first surface and push the first slider to move to the second surface to contact the first extension portion, so that when the first extension portion applies force to the first slider, the die head can timely rollback.

[0012] In some optional embodiments, the cross section of the first slider is a first trapezoid, one leg of the first trapezoid is the first surface, the other leg of the first trapezoid is the second surface, and the size of one end of the first slider close to the die head in the first direction is larger.

[0013] The first slider adopts the structure in the above embodiments, which can be easily pushed by the first extension portion and the second extension portion.

[0014] In some optional embodiments, the cross section of the second extension portion is a second trapezoid, one leg of the second trapezoid is in contact with the first surface, and the other leg of the second trapezoid is in contact with the mounting table; and in the first direction, the size of one end of the second extension portion close to the die head is smaller, so that the second extension portion pushes the first slider to move towards the first extension portion during the movement of the second extension portion towards the die head.

[0015] In the technical scheme, the first sliding block and the second extending part are both in the form of trapezoid, and the first sliding block and the second extending part are in surface contact, so that the force can be well transmitted, and the size of the second extending part close to the die head is small, so that the second extending part can be easily extended between the first sliding block and the mounting table and push the first sliding block to move towards the first extending part.

[0016] In some optional embodiments, the second extending part and the first sliding block are connected through a sliding groove structure and a guide rail structure; the sliding groove structure is arranged on one of the second extending part and the first sliding block, and the guide rail structure is arranged on the other one.

[0017] In the technical scheme, the second extending part and the first sliding block are connected through a sliding groove structure and a guide rail structure, so that when the second extending part moves away from the die head, the first sliding block can also be driven to move away from the first extending part, so that a gap is formed between the first extending part and the first sliding block, and then the die head can be moved towards the coating roller, thereby reducing the coating thickness.

[0018] In some optional embodiments, the second extending part is a rod structure extending along the first direction, one end of the rod structure is movably connected to the mounting table, and the other end is in contact with the second surface; the rod structure moves along the first direction on the mounting table to push the first sliding block to contact the first extending part.

[0019] In the technical scheme, the second extending part extends along the first direction, so that the force can be more conveniently applied to the first sliding block to move the first sliding block along the first direction to contact the first extending part. The second extending part is connected to the mounting table, so that the force applied by the first extending part can be transmitted to the mounting table and then to the die head, so that the die head can be timely retracted.

[0020] In some optional embodiments, the gap adjusting assembly comprises a micrometer fine adjustment mechanism, and the second extending part is located on a screw rod of the micrometer fine adjustment mechanism to change the movement distance of the second extending part.

[0021] In the technical scheme, the screw rod of the micrometer fine adjustment mechanism can be extended or retracted by rotating a knob of the micrometer fine adjustment mechanism. Since the second extending part is located on the screw rod of the micrometer fine adjustment mechanism, the movement distance of the second extending part can be more accurately adjusted. In addition, the micrometer fine adjustment mechanism also has a self-locking function, so that when the first extending part is extended downward and the second extending part is pressed, the second extending part is not easy to change position, so that the die head can be timely retracted while the first extending part is extended.

[0022] In some alternative 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, the first mark is aligned with the reference line, so that the first slider is in a first position to make the second surface contact the first extension; in the second working state, the distance between the die head and the coating roller is a second distance, the second mark is aligned with the reference line, so that the first slider is in a second position to make the second surface contact the first extension.

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

[0024] In some alternative embodiments, the retreat component further includes a driving member, the first extension is a roller rotatably connected to the driving member, and the driving member is used to drive the roller to move towards the die head; the peripheral surface of the roller contacts the second surface.

[0025] In the above technical solution, the first extension is a roller, and the peripheral surface of the roller contacts the second surface, so that in the process of driving the first extension to move towards the die head by the driving member, the first extension rolls along the second surface while applying a force to the second surface, which can reduce the resistance of the first extension to move towards the die head, so as to more easily push the die head to retreat away from the coating roller.

[0026] In some alternative embodiments, an advancing mechanism for driving the die head to move towards the coating roller is further included, and a first positioning block and a second positioning block are used to position the die head during movement towards the coating roller.

[0027] The first positioning block is arranged on the rack and can be selectively located at a third position or a 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 to make the die head be located at the first position; when the first positioning block is at the fourth position, the second positioning block contacts the first positioning block to make the die head be located at the second position.

[0028] In the technical scheme, the first positioning block is movably arranged on the frame, and the second positioning block is fixedly arranged on the die head, so that the die head is in the first position when the first positioning block is in the third position, and the die head is in the second position when the first positioning block is in the fourth position. The die head can be in different positions by changing the position of the first positioning block, so as to form a coating layer with different thicknesses on the substrate. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0030] Figure 1 A schematic view of a gap coating device in the prior art;

[0031] Figure 2 A schematic view of a gap coating device provided by an embodiment of the present application;

[0032] Figure 3 A schematic view of a gap coating device provided by another embodiment of the present application.

[0033] Legend: 100-coating roller; 210-die head; 220-first slider; 221-first surface; 222-second surface; 230-mounting table; 300-back-off assembly; 310-first extension; 320-driving member; 400-gap adjustment assembly; 410-second extension; 420-micrometer fine adjustment mechanism; 421-screw rod; 422-sleeve; 423-knob; 430-bracket. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, but not all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations.

[0035] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0036] It should be noted that similar reference numerals and letters refer to like items throughout the accompanying drawings, and once an item is defined in one drawing, it is not necessary to further define and explain it in subsequent drawings.

[0037] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "vertical", "horizontal", "inner", "outer", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the application is used, which is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the 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.

[0038] In addition, the terms "horizontal", "vertical", "overhanging", etc. do not mean that the components must be absolutely horizontal or overhanging, but can be slightly inclined. For example, "horizontal" only means that it is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0039] In the description of the present application, it should also be noted that unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication between the 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.

[0040] The applicant found that the existing Chinese patent with publication number CN115999845A has the problem of not timely returning the die during implementation, that is, there is a certain time difference between the work instruction for returning the die and the start of the die returning, which makes the size accuracy of the coating in the length direction of the substrate lower. As shown in Figure 1 The reasons for this problem include: after a certain period of time, a gap appears between the second matching part and the first matching part; after increasing the thickness of the coating or the substrate for production, the die needs to move away from the coating roller, so that a gap appears between the second matching part and the first matching part.

[0041] Based on this, the embodiments of the present application provide a gap coating device for coating the substrate provided on the coating roller 100 with slurry in the coating process to form a coating with higher size accuracy on the substrate.

[0042] AsFigure 2 With Figure 3 As shown in FIG. 1, the gap coating device includes a frame, a die head 210, a retreat assembly 300, and a gap adjustment assembly 400. The die head 210 is slidably disposed on the frame for intermittently applying paste to a substrate disposed on the coating roller 100.

[0043] The die head 210 is provided with a first slider 220 slidable in a first direction (i.e., the direction indicated by arrow A in FIG. 1) and is further fixedly provided with a mounting table 230 connected to the die head 210. The first slider 220 and the mounting table 230 are spaced apart in the first direction, i.e., the first slider 220 and the mounting table 230 have a spacing in the first direction and are not in direct contact. The first slider 220 has a first surface 221 and a second surface 222 opposite in the first direction. Figure 2 With Figure 3 The first slider 220 has a first surface 221 and a second surface 222 opposite in the first direction.

[0044] The retreat assembly 300 is disposed on the frame and has a first extension 310 that can approach or move away from the second surface 222. That is, in some working processes, the first extension 310 can move in a direction approaching the second surface 222, and in other working processes, the first extension 310 can move in a direction away from the second surface 222.

[0045] The gap adjustment assembly 400 is disposed on the die head, and the gap adjustment assembly 400 has a second extension 410 with an adjustable position. One end of the second extension 410 is in contact with the first surface 221, and the other end of the second extension 410 opposite in the second extension 410 is connected to the mounting table 230. The second extension 410 is configured to adjust the position so that the second extension 410 is in contact with the first surface 221 and pushes the first slider 220 to move to the second surface 222 to contact the first extension 310.

[0046] When the first extension 310 exerts a force on the second surface 222, the first slider 220 can be pushed to move the die head 210 away from the coating roller 100 in the first direction. It is not difficult to understand that, since the first surface 221 of the first slider 220 is in contact with one end of the second extension 410, and the other end of the second extension 410 opposite in the second extension 410 is connected to the mounting table 230, and the mounting table 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 table 230 is a force-transmitting connection, such as a fixed connection between the second extension 410 and the mounting table 230, or a contact connection in the first direction.

[0047] Furthermore, since the position of the second protrusion 410 is adjustable so that it contacts the first surface 221 and pushes the first slider 220 to move until the second surface 222 contacts the first protrusion 310, and the other end of the second protrusion 410 is connected to the mounting platform 230, the first protrusion 310 and the first slider 220, the first slider 220 and the second protrusion 410, and the second protrusion 410 and the mounting platform 230 can be adjusted to achieve no gap in the first direction, no gap in the first direction, and no gap in the first direction. In this state, the first protrusion 310 applies force to the second surface 222 and pushes the first slider 220, so that as the die head 210 moves away from the coating roller 100 in the first direction, the first protrusion 310, the first slider 220, the second protrusion 410, the mounting platform 230, and the die head 210 move simultaneously, thereby making the coating have high dimensional accuracy in the longitudinal direction of the substrate.

[0048] Furthermore, to increase the thickness of the coating or substrate produced, the die head 210 needs to move away from the coating roller 100, which in turn will cause the first slider 220 to also move away from the coating roller 100, thus separating the first slider 220 from the first protrusion 310. Since the position of the second protrusion 410 is adjustable, the first slider 220 can be pushed back to the position where the second surface 222 re-contacts the first protrusion 310 by adjusting the position of the second protrusion 410.

[0049] In some embodiments, the cross-section of the first slider 220 is a first trapezoid, the surface containing one leg of the first trapezoid is the first surface 221, and the surface containing the other leg of the first trapezoid is the second surface 222. In the first direction, the end of the first slider 220 closest to the die head 210 is wider, i.e., as shown... Figure 2 and Figure 3 As shown, the portion of the first slider 220 near the die head 210 has a larger dimension in the first direction. In this embodiment, the second surface 222 is an inclined plane, therefore, as Figure 2 As shown, the first protrusion 310 can move in a direction perpendicular to the first direction to apply a force to the second surface 222, or it 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 retraction assembly 300 and the first protrusion 310 is more flexible and diverse. It is not difficult to understand that, as Figure 2 or Figure 3 As shown, the aforementioned cross-section is parallel to the first direction and parallel to the vertical plane.

[0050] In some other embodiments, the first slider 220 may also be a rectangular cross-section structure, and correspondingly, the first protrusion 310 may apply a force to the second surface 222 of the first slider 220 along a first direction.

[0051] Furthermore, in some embodiments, the first protrusion 310 may be provided as a single unit, or as two or more units. In embodiments where only one first protrusion 310 is provided, the position of the first protrusion 310 passes through the plane of symmetry of the die head 210, wherein the plane of symmetry of the die head 210 is a vertical plane parallel to the first direction; when the first protrusion 310 passing through the plane of symmetry of the die head 210 applies force to the first slider 220, the force on the die head 210 is more uniform, and the die head 210 can be retracted more effectively. When there are two or more first protrusions 310, the first protrusions 310 can be evenly distributed in a horizontal direction and perpendicular to the first direction, so that the force on the die head 210 is more uniform.

[0052] Accordingly, in some embodiments, such as embodiments where there are two or more first protrusions 310, the first slider 220 can be a long, cylindrical structure with a trapezoidal cross-section, or the first slider 220 can also be configured as two or more. In other embodiments, such as embodiments where there is only one first protrusion 310, the first slider 220 can be a block structure with a trapezoidal cross-section.

[0053] In some embodiments, the cross-section of the second extension 410 is a second trapezoid, with one side of the second trapezoid contacting the first surface 221 and the other side contacting the mounting platform 230; and in the first direction, the dimension of the second extension 410 near the mold head 210 is smaller, so that as the second extension 410 moves toward the mold head 210, it pushes the first slider 220 toward the first extension 310. In this embodiment, both the first slider 220 and the second extension 410 have trapezoidal cross-sections, such as... Figure 2 As shown, the second protrusion 410 can move perpendicular to the first direction toward or away from the mold head 210, thus occupying less space in the first direction; and the first slider 220 and the second protrusion 410 can be in surface contact, which can better transmit the force; and the size of the second protrusion 410 near the mold head 210 is smaller, which makes it easier to insert the second protrusion 410 between the first slider 220 and the mounting table 230 and push the first slider 220 toward the first protrusion 310.

[0054] Furthermore, the second protrusion 410 and the first slider 220 are slidably connected through a matching groove structure and guide rail structure. This sliding connection between the first slider 220 and the second protrusion 410 also allows the second protrusion 410 to move away from the die head 210, simultaneously causing the first slider 220 to move away from the first protrusion 310, creating a gap between them. This facilitates moving the die head 210 closer to the coating roller 100, thereby reducing the coating thickness. In some embodiments, the groove structure may be located in the second protrusion 410 and the guide rail structure in the first slider 220, or vice versa.

[0055] In other embodiments, the second extension 410 may also move in a direction parallel to the first direction. For example... Figure 3 As shown, the second protrusion 410 is a rod-shaped structure extending along a first direction. One end of the rod-shaped structure is movably connected to the mounting platform 230, and the other end contacts the second surface 222. The rod-shaped structure is disposed on the mounting platform 230 and can move along the first direction to push the first slider 220 to contact the first protrusion 310. The movable connection of one end of the rod-shaped structure to the mounting platform 230 allows the rod-shaped structure to move relative to the mounting platform 230, and also allows it to be fixed relative to the mounting platform 230. When the rod-shaped structure can move relative to the mounting platform 230, the position of the first slider 220 can be adjusted; when the rod-shaped structure can be fixed relative to the mounting platform 230, the force applied by the first protrusion 310 can be transmitted to the mounting platform 230, causing the mounting platform 230 to drive the mold head 210 to move.

[0056] Furthermore, 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. The second extension 410 is located on the screw 421 of the micrometer fine-tuning mechanism 420 to change the movement distance of the second extension 410. The micrometer fine-tuning mechanism 420 is a component of an existing micrometer or micrometer gauge, and from the inside out includes a screw 421, a collar 422, and a knob 423. Rotating the knob 423 extends and retracts the screw 421, thereby moving the second extension 410. Both the collar 422 and the knob 423 are provided with scale lines for reading. Further, in this embodiment, the collar 422 can be directly connected to the mounting platform 230, or... Figure 2 and Figure 3The second extension 410 is connected to the mounting table 230 through the bracket 430. By connecting the sleeve 422 to the mounting table 230, the screw rod 421 is movably connected to the mounting table 230, i.e. one end of the rod-shaped structure is movably connected to the mounting table 230.

[0057] In some embodiments, the second extension 410 is located at the end of the screw rod 421, as shown in FIG. 4B. Figure 2 In some embodiments, the second extension 410 is a second slider with a trapezoidal cross section, and the second extension 410 is connected to the end of the screw rod 421, as shown in FIG. 4C. Figure 3 In some embodiments, the second extension 410 is the end of the screw rod 421 that is away from the mounting table 230, as shown in FIG. 4D.

[0058] In some embodiments, the gap coating device has a first working state and a second working state, and 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 210 and the coating roller 100 is a first distance, and the first mark is aligned with the reference line, so that the first slider 220 is in the first position and the second surface 222 contacts the first extension 310. In the second working state, the distance between the die 210 and the coating roller 100 is a second distance, and the second mark is aligned with the reference line, so that the first slider 220 is in the second position and the second surface 222 contacts the first extension 310. It is not difficult to understand that in the first working state and the second working state, the distance between the die 210 and the coating roller 100 is the first distance and the second distance respectively, and in the first working state and the second working state, the thickness of the coating or the substrate is different. After changing the coating thickness, the first slider 220 can be quickly adjusted to the state that the second surface 222 contacts the first extension 310 by aligning the corresponding first mark or second mark with the reference line through the gap adjustment mechanism.

[0059] In some embodiments, the reference line can be a mark provided on the knob 423, and the first mark and the second mark can be marks provided on the sleeve 422. For example, in some embodiments, the reference line can be the edge of the knob 423 on the side facing the second extension 410, and the first mark and the second mark can be two scale lines provided on the sleeve 422 along the axis. During rotation of the knob 423, the edge of the knob 423 is aligned with the scale indicated by the first mark, which means that the first mark is aligned with the reference line, and the edge of the knob 423 is aligned with the scale indicated by the second mark, which means that the second mark is aligned with the reference line. In other embodiments, the first mark and the second mark can also be notches provided on the screw rod 421 along the axis of the screw rod 421, and the reference line can be the edge of the sleeve 422 on the side facing the direction in which the second extension 410 extends.

[0060] Furthermore, in some embodiments of this application, the retraction assembly 300 further includes a drive member 320, and the first extension 310 is a roller rotatably connected to the drive member 320. The drive member 320 is used to drive the roller to move toward the die head 210; the circumferential surface of the roller contacts the second surface 222. By using a roller as the first extension 310 and rotatably connected to the drive member 320, during the process of the drive member 320 driving the first extension 310 to move toward the die head 210, the first extension 310 applies a force to the second surface 222 while rolling along the second surface 222, which can reduce the resistance encountered by the first extension 310 in moving toward the die head 210, so as to more easily push the die head 210 to retract away from the coating roller 100.

[0061] In some embodiments, the drive element 320 is a first cylinder, and the first extension 310 is rotatably connected to the piston rod. In such... Figure 2 In the illustrated embodiment, the piston rod of the first cylinder is vertically oriented. In other embodiments, the piston rod of the first cylinder may also be oriented along a first direction or inclined relative to the horizontal plane. In the embodiment where the first extension 310 is driven by a cylinder, due to the characteristics of the cylinder, its piston rod only has a fully extended state and a fully retracted state. It is easy to understand that when the piston rod of the first cylinder is fully extended, the die head 210 has completed the process of retracting 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 where the first extension 310 is driven by a cylinder 320, the driving component 320 can only play the role of retracting the die head 210. If it is necessary to adapt to the production of coating strips of various thicknesses (different coating or substrate thicknesses), the driving component 320 needs to be disassembled and re-adjusted, which is a complicated operation. Based on this, a cylinder is used as the driving component 320 to drive the first extension 310 to move. Combined with the gap adjustment component 400, the retraction of the die head 210 can be achieved conveniently and simply through the cylinder, and it can also meet the needs of producing coating strips of various thicknesses.

[0062] In some embodiments, a forward mechanism for driving the die head 210 toward the coating roller 100 is also included, as well as 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 as it moves toward the coating roller 100. That is, when the first positioning block and the second positioning block are in contact, the die head 210 stops moving toward the coating roller 100 and stops at a position where slurry can be applied to the substrate on the coating roller 100.

[0063] Further, the first positioning block is arranged on the frame and can be selectively located at a third position or a fourth position, and the second positioning block is fixedly arranged on the die 210; when the first positioning block is at the third position, the second positioning block is in contact with the first positioning block, so that the die 210 is located at the first position; when the first positioning block is at the fourth position, the second positioning block is in contact with the first positioning block, so that the die 210 is located at the second position. It can be understood that, when the first positioning block is adjusted from the third position to the fourth position, the die 210 changes from performing the coating process at the first position to performing the coating process at the second position, so that the coating material belt with different thicknesses can be produced.

[0064] The application further provides a gap coating method, which is implemented by using the gap coating device provided in the above-mentioned embodiments of the application, so that the die 210 can be timely retreated after the retreat mechanism is actuated. Specifically, the relative positions of the die 210 and the coating roller 100 are adjusted according to the thickness of the coating material belt to be produced before production, and then the first extension part 310 and the second surface 222 are brought into contact by the gap adjustment assembly 400; when retreat is needed, the first extension part 310 is controlled to apply force to the second surface 222 (for example, by moving the first extension part 310 towards the die 210), so that the first sliding block 220, the second extension part 410, the mounting table 230 and the die 210 are synchronously moved, and the die 210 is timely moved away from the coating roller 100 along the first direction.

[0065] The application further provides a gap coating method, which can be used to produce coating material belts with different thicknesses, and is implemented by using the gap coating device with the first working state and the second working state of the die 210. The specific method includes: adjusting the die 210 from the first position to the second position, and adjusting the micrometer fine adjustment mechanism 420 so that the second mark on the screw rod 421 is aligned with the reference line, and then driving the first sliding block 220 to move to the position where the second surface 222 contacts the first extension part 310, so as to adjust the gap coating device from the first working state to the second working state. By this method, when it is needed to adjust the gap coating device to the second working state, the first sliding block 220 can be quickly adjusted to the state where the second surface 222 contacts the first extension part 310 by aligning the second mark on the screw rod 421 with the reference line through the second sliding block.

[0066] The above only describes the preferred embodiments of the application and is not used to limit the application. For those skilled in the art, the application can have various changes and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A gap coater for applying a paste to a substrate provided on a coating roll, characterized by The application relates to a gap adjusting device for a die head of a coating machine. The application comprises: a frame, a die head slidingly arranged on the frame, the die head being used for coating slurry on a substrate arranged on a coating roller; the die head is provided with a first slider capable of sliding in a first direction, and a mounting table arranged in the first direction and spaced from the first slider; the die head is fixedly connected with the mounting table; the first slider has a first surface and a second surface opposite to each other in the first direction; a retreat assembly arranged on the frame, the retreat assembly having a first extension part capable of approaching or moving away from the second surface; a gap adjusting assembly arranged on the die head, the gap adjusting assembly having a second extension part with an adjustable position; one end of the second extension part is in contact with the first surface, and the other end of the second extension part opposite to the one end is connected with the mounting table; the second extension part is configured to adjust the position so that the second extension part is in contact with the first surface and pushes the first slider to move to the second surface to contact the first extension part; 2. The gap coater of claim 1, wherein the retreat assembly is configured so that the first extension part can apply force to the second surface and push the first slider so that the die head moves away from the coating roller in the first direction.

3. The gap coater of claim 2, wherein The first slider has a first trapezoidal cross section; one side of the first trapezoidal cross section is the first surface, and the other side of the first trapezoidal cross section is the second surface; in the first direction, the size of one end of the first slider close to the die head is larger.

4. The gap coater of claim 3, wherein The second extension part has a second trapezoidal cross section; one side of the second trapezoidal cross section is in contact with the first surface, and the other side of the second trapezoidal cross section is in contact with the mounting table; in the first direction, the size of one end of the second extension part close to the die head is smaller, so that the second extension part pushes the first slider to move to the first extension part during movement of the second extension part to the die head.

5. The gap coater of claim 2, wherein The second extension part and the first slider are slidingly connected through a matching sliding groove structure and a guide rail structure; the sliding groove structure is arranged on one of the second extension part and the first slider, and the guide rail structure is arranged on the other one of the second extension part and the first slider.

6. The gap coater of any of claims 1-5, wherein The second extension part is a rod-shaped structure extending in the first direction; one end of the rod-shaped structure is movably connected to the mounting table, and the other end is in contact with the second surface; the rod-shaped structure moves in the first direction on the mounting table to push the first slider to contact the first extension part. The gap adjusting assembly comprises a micrometer fine adjustment mechanism; the second extension part is located on a screw rod of the micrometer fine adjustment mechanism to change the movement distance of the second extension part.

7. The gap coater of claim 6, wherein 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, the first mark is aligned with the reference line, so that the first slider realizes the second surface contacting the first extension part in the first position; in the second working state, the distance between the die head and the coating roller is a second distance, the second mark is aligned with the reference line, so that the first slider realizes the second surface contacting the first extension part in the second position.

8. The gap coater of claim 7, wherein Further comprising an advancing mechanism for driving the die head to move towards the coating roller, and a first positioning block and a second positioning block for positioning the die head during the movement of the die head towards the coating roller; The first positioning block is arranged on the rack and can be selectively located in a third position or a fourth position, and the second positioning block is fixedly arranged on the die head; when the first positioning block is in the third position, the second positioning block contacts the first positioning block, so that the die head is located in the first position; when the first positioning block is in the fourth position, the second positioning block contacts the first positioning block, so that the die head is located in the second position.

9. The gap coater of any of claims 2-5, wherein, The back-off assembly further comprises a driving member, the first extension part is a roller rotatably connected to the driving member, and the driving member is used to drive the roller to move towards the die head; the peripheral surface of the roller is in contact with the second surface.

10. The gap coater of claim 9, wherein The driving member is a first air cylinder, the piston rod of the first air cylinder is vertically arranged, and the roller is rotatably connected to the piston rod. The driving member is a first air cylinder, the piston rod of the first air cylinder is vertically arranged, and the roller is rotatably connected to the piston rod.

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