Adjusting block, adjusting mechanism and coating die

Abstract

The application discloses an adjusting block, an adjusting mechanism and a coating die, and relates to the technical field of coating devices. The adjusting block comprises a rod body, a flow-cutting block and an elastic extruding piece. The rod body has opposite first and second ends, and the first end of the rod body is adapted to be connected with an actuator. The flow-cuting block is integrally formed with the rod body or fixed to the second end of the rod body. The elastic extruding piece is arranged on the bottom surface of the flow-cutting block and comprises an elastic body and a deformation part. The deformation part is arranged in a bent manner towards the direction close to the rod body. The elastic body is adapted to be accommodated in a gasket, and the deformation part is adapted to be arranged corresponding to a coating edge to form a flow-cutting surface of the coating edge. The application provides the adjusting block, which can not only control the thickness of the coating edge by adjusting the extruding degree, but also jointly adjust the thickness of the coating edge in the form of the material supplementing and extruding, thereby effectively improving the coating consistency. In addition, the material supplementing structure can also be used for coating a second coating material to meet different production requirements.

Description

Technical Field

[0001] This invention relates to the field of coating apparatus technology, and more particularly to an adjusting block, an adjusting mechanism, and a coating die. Background Technology

[0002] Slot coating is an advanced, pre-load coating technology where all the fluid fed into the coating die forms a coating on the substrate. Therefore, the areal density of the wet coating can be precisely controlled by varying the slurry feed rate and the coating speed. The coating process involves a controlled flow of slurry entering the die cavity from the feed port, creating stable pressure, and finally being extruded through the slot outlet of the die, coating the foil. The coating is then dried in an oven.

[0003] During the coating process, due to the fluid characteristics of the slurry, a crescent-shaped feature easily forms at the two edges. This sudden increase in thickness at the electrode edges during the coating process is known as the "bulging edge" phenomenon. This "bulging edge" phenomenon is undesirable and can cause problems with the battery manufacturing process, battery performance, and consistency.

[0004] In existing technologies, such as Figure 1 As shown, coating thickness is typically adjusted via an adjustment mechanism, which includes a micrometer head, coupling, and T-block 101. T-block 101 extends into the die head slit and adjusts the areal density under the drive of the micrometer head. However, the cut-off surface of T-block 101 is flat. When adjusting the coating edge 102 thickness with T-block 101, it can also affect the inner area that doesn't need adjustment. If the coating edge bulges, pressing down T-block 101 thins the coating edge 102, but the inner area becomes even thinner, forming a depression; similarly, if the coating edge 102 is thin, lifting T-block 101 thickens the coating edge 102, but the inner area becomes even thicker, forming a bulge. Therefore, effective adjustment is not possible, and the "bulging" phenomenon is difficult to resolve. Summary of the Invention

[0005] The main objective of this invention is to provide an adjustment block, an adjustment mechanism, and a coating die head, which aim to adjust the coating edge thickness to effectively solve the "bulging edge" phenomenon.

[0006] To achieve the above objectives, the present invention proposes an adjustment block, comprising:

[0007] A rod having a first end and a second end opposite to each other, the first end of the rod being adapted to be connected to the actuator of a coating die head;

[0008] A flow-blocking block, wherein the flow-blocking block is integrally formed with the rod body or fixed to the second end of the rod body; and

[0009] An elastic extrusion member is disposed on the bottom surface of the intercepting block. The elastic extrusion member includes an elastic body and a deformable part connected to the elastic body. The deformable part is bent toward the direction close to the rod. The elastic body is adapted to be housed in the gasket of the coating die head. The deformable part is adapted to be disposed corresponding to the coating edge and to form the intercepting surface of the coating edge.

[0010] Optionally, the bottom surface of the intercepting block is provided with an inclined surface or an arc surface, the extension direction of the inclined surface or the arc surface is consistent with the bending direction of the deformable part, and the deformable part is attached to the inclined surface or the arc surface.

[0011] Optionally, the rod body is provided with a feeding channel, the feeding end of the feeding channel is adapted to communicate with a feeding device, the intercepting block is provided with a flow channel communicating with the discharge end of the feeding channel and a feeding port communicating with the flow channel, and the feeding port is adapted to be set corresponding to the coating edge.

[0012] Optionally, the feeding port is located on the outside of the deformed part.

[0013] Optionally, the elastic body is flat against the bottom surface of the intercepting block, and the plane where the feeding port is located is parallel to the plane where the elastic body is located.

[0014] To achieve the above objectives, the present invention provides an adjustment mechanism, comprising:

[0015] Adjustment block, wherein the adjustment block is the aforementioned adjustment block;

[0016] A mounting base, suitable for fixing to the coating die head;

[0017] An actuator is mounted on the fixed base; and

[0018] A coupling, one end of which is connected to the output end of the actuator, and an adjusting block is connected to the other end of the coupling;

[0019] The adjusting block includes: a rod having a first end and a second end, the first end of the rod being adapted to be connected to an actuator of a coating die head; a flow-stopping block integrally formed with the rod or fixed to the second end of the rod; and an elastic extrusion member disposed on the bottom surface of the flow-stopping block, the elastic extrusion member including an elastic body and a deformable portion connected to the elastic body, the deformable portion being bent toward the direction approaching the rod, the elastic body being adapted to be accommodated in a gasket of the coating die head, and the deformable portion being adapted to be disposed corresponding to the coating edge and to form its flow-stopping surface.

[0020] Optionally, the rod of the adjusting block is provided with a feeding channel, the throttling block of the adjusting block is provided with a flow channel communicating with the discharge end of the feeding channel and a feeding port communicating with the flow channel, and the adjusting mechanism further includes a converter with a conversion interface, the converter being provided on the feeding end of the rod, and the conversion interface being adapted to communicate with the feeding valve through a pipe.

[0021] Optionally, the actuator is a differential head or a linear motor.

[0022] To achieve the above objectives, the present invention also provides a coating die head, comprising:

[0023] The adjustment mechanism, the two adjustment mechanisms located at the coating edge are the aforementioned adjustment mechanisms;

[0024] A first mold body, wherein the first mold body is provided with at least one clearance hole; and

[0025] The second mold body is connected and fixed to the first mold body. A gasket is sandwiched between the first mold body and the second mold body, and a coating slit communicating with the clearance hole is formed. The adjustment mechanism is provided on the first mold body and extends into the coating slit through the clearance hole.

[0026] Optionally, the gasket is provided with a receiving groove for accommodating the elastic compression member of the adjusting mechanism.

[0027] In the technical solution of this invention, the adjusting block includes a rod, a flow-stopping block, and an elastic extruder. The rod has a first end and a second end, the first end of which is adapted to be connected to the actuator of the coating die head. The flow-stopping block is integrally formed with the rod or fixed to the second end of the rod. The elastic extruder is disposed on the bottom surface of the flow-stopping block. The elastic extruder includes an elastic body and a deformable part connected to the elastic body. The deformable part is bent towards the direction close to the rod. The elastic body is adapted to be accommodated in the gasket of the coating die head, and the deformable part is adapted to be disposed corresponding to the coating edge and to form the flow-stopping surface of the coating edge. It can be understood that during the coating process, the adjusting block moves downward under the action of actuators such as the micrometer head. As the elastic extruder at the bottom of the adjusting block is pressed down, its elastic body is squeezed into the body of the gasket, and the upwardly inclined deformable part is also gradually squeezed, continuing to press down the edge of the wet coating. During this period, the adjusting mechanism corresponding to the inner side of the wet coating stops pressing down, and the thickness of the coating edge becomes thinner to the same as the thickness of the inner side of the coating. In this way, the thickness of the coating edge can be adjusted, effectively solving the "bulging edge" phenomenon. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0029] Figure 1 An analysis diagram of the "bulging edge" phenomenon in existing technologies;

[0030] Figure 2 This is a schematic diagram of the structure of an embodiment of the adjusting block of the present invention;

[0031] Figure 3 This is a schematic diagram illustrating the principle of coating edge thickness adjustment in one embodiment of the adjusting block of the present invention.

[0032] Figure 4 This is a schematic diagram of the structure of an embodiment of the adjusting mechanism of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of the adapter in one embodiment of the adjustment mechanism of the present invention;

[0034] Figure 6 This is a schematic diagram of the structure of an embodiment of the coating die head of the present invention;

[0035] Figure 7 This is an exploded view of an embodiment of the coating die head of the present invention.

[0036] Explanation of icon numbers:

[0037] 101, T-block; 102, coating edge; 10, adjusting mechanism; 20, first mold body; 30, second mold body; 40, gasket; 20a, coating slit; 100, adjusting block; 200, fixed base; 300, actuator; 400, coupling; 500, adapter; 500a, adapter interface; 50, feeding valve; 110, rod body; 120, throttling block; 130, elastic extrusion part; 131, elastic body; 132, deformable part; 120a, feeding port.

[0038] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0039] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0040] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0041] Furthermore, the use of terms such as "first" and "second" in this invention is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the word "and / or" throughout the text means including three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution that simultaneously satisfies A and B. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0042] In one exemplary technology, such as Figure 1 As shown, coating thickness is typically adjusted via an adjustment mechanism, which includes a micrometer head, coupling, and T-block 101. T-block 101 extends into the die head slit and adjusts the areal density under the drive of the micrometer head. However, the cut-off surface of T-block 101 is flat. When adjusting the coating edge 102 thickness with T-block 101, it can also affect the inner area that doesn't need adjustment. If the coating edge bulges, pressing down T-block 101 thins the coating edge 102, but the inner area becomes even thinner, forming a depression; similarly, if the coating edge 102 is thin, lifting T-block 101 thickens the coating edge 102, but the inner area becomes even thicker, forming a bulge. Therefore, effective adjustment is not possible, and the "bulging" phenomenon is difficult to resolve.

[0043] In response, this invention proposes an adjustment block that can be applied to coating dies, especially high-temperature slurry coating devices, but is not limited thereto.

[0044] Please refer to the following: Figure 2 and Figure 7In one embodiment of the present invention, the adjusting block 100 includes a rod 110, a flow-stopping block 120, and an elastic extrusion member 130; the rod 110 has a first end and a second end opposite to each other, and the first end of the rod 110 is adapted to be connected to the actuator 300 of the coating die head; the flow-stopping block 120 is integrally formed with the rod 110 or fixed to the second end of the rod 110; the elastic extrusion member 130 is disposed on the bottom surface of the flow-stopping block 120, and the elastic extrusion member 130 includes an elastic body 131 and a deformable part 132 connected to the elastic body 131, the deformable part 132 is bent toward the direction close to the rod 110, the elastic body 131 is adapted to be accommodated in the gasket 40 of the coating die head, and the deformable part 132 is adapted to be disposed corresponding to the coating edge 102 and to form the flow-stopping surface of the coating edge 102.

[0045] In this embodiment, both the rod 110 and the intercepting block 120 can be made of corrosion-resistant metal or plastic material, and no specific limitation is made here.

[0046] The rod 110 can be cylindrical or square, and can be solid or hollow; there are no restrictions here. The flow-blocking block 120 can be cuboid, and the two are connected to form a "T"-shaped block.

[0047] The elastic extrusion part 130 can be made of flexible materials such as silicone, and there is no limitation here.

[0048] It should be noted that after being pressed down, the elastic body 131 is housed in the gasket 40 of the coating die head. That is, the elastic body 131 is a non-intercepting surface and does not compress the slurry. The gasket 40 can be milled with a receiving groove so that the elastic body 131 can be accommodated in the receiving groove of the gasket 40. The adjusting block 100 is set at the coating edge 102. That is to say, under normal circumstances, two sets of the adjusting block 100 need to be set on the coating die head to correspond to the two sides of the wet coating, respectively. The T-block 101 of the adjusting mechanism 10 located on the inner side of the coating can adopt a conventional structure.

[0049] Understandably, during the coating process, the adjusting block 100 moves downward under the action of the actuator 300, such as the micrometer head. As the adjusting block 100 is pressed down, its elastic body 131 is squeezed into the body receiving groove of the gasket 40, and the upwardly tilted deformable part 132 is also gradually squeezed, further pressing down the "bulging edge" of the wet coating. During this period, the conventional adjusting mechanism 10 corresponding to the inner side of the wet coating stops pressing down, and the thickness of the coating edge 102 becomes thinner to the same thickness as the inner side of the coating. In this way, the thickness of the coating edge 102 is adjusted, effectively solving the "bulging edge" phenomenon.

[0050] To further improve the consistency between the coating edge 102 thickness and the coating inner side thickness, in one embodiment, referring to... Figure 2 and Figure 3One side of the bottom surface of the intercepting block 120 may be provided with an inclined surface or an arc surface, the extension direction of which is consistent with the bending direction of the deformable part 132, and the deformable part 132 is attached to the inclined surface or the arc surface. This allows the deformable part 132 to fit better onto the intercepting block 120, thereby further improving the effect of flattening the "bulging edge" of the wet coating edge and increasing the adjustment range of the coating edge thickness.

[0051] like Figure 3 As shown, the right image shows the adjusting block 100 in its natural state, with the lower surface of the adjusting block 100 at the coating edge 102 at a height of h0 from the working surface, and the width through which the slurry flows is w0. The left image shows the adjusting block 100 in its compressed state, with the lower surface of the adjusting block 100 at the coating edge 102 at a height of h1 from the working surface, and the width through which the slurry flows is w1. It is clear that h1 is less than h0. Therefore, by controlling the downward pressure of the adjusting block 100 on the edge of the wet coating, the thickness of the coating edge 102 can be changed. Furthermore, as shown in the image, w1 is less than w0, meaning that as the adjusting block 100 is continuously compressed, the width through which the slurry flows also continuously decreases. Therefore, by reasonably setting the dimensions of the aforementioned inclined or curved surface, the adjustment range of the coating edge thickness can be effectively increased.

[0052] Main reference Figure 2 In one embodiment, the rod body 110 may be provided with a feeding channel. The rod body 110 has a hollow structure. The feeding end of the feeding channel is adapted to communicate with the feeding valve 50 of the feeding device. The throttling block 120 is provided with a flow channel communicating with the discharge end of the feeding channel and a feeding port 120a communicating with the flow channel. The feeding port 120a is adapted to be set corresponding to the coating edge 102.

[0053] In this embodiment, the filling port 120a is located on the outside of the deformed part 132 so that the replenished slurry can flow smoothly to the thin edge of the coating edge 102.

[0054] To further improve the uniformity of coating, in this embodiment, the elastic body 131 can be flatly attached to the bottom surface of the intercepting block 120, and the plane where the feed port 120a is located is parallel to the plane where the elastic body 131 is located.

[0055] It is understood that the present invention, by setting a feeding channel within the rod body 110, connecting the feed end of the feeding channel to the feeding valve 50 of the feeding device, and setting a flow channel connected to the discharge end of the feeding channel and a feeding port 120a connected to the flow channel in the throttling block 120, thereby achieving slurry replenishment at the coating edge 102 to solve the problem of thin edges at the coating edge 102. Furthermore, the above-mentioned feeding structure can also be used to coat a second type of coating, such as insulating adhesive, to coat an insulating layer at the edge of the slurry to meet different production needs.

[0056] On the one hand, by setting up an elastic extruder 130 and changing the height position of the elastic extruder 130, the present invention achieves different degrees of extrusion, which can effectively control the thickness of the coating edge 102.

[0057] On the other hand, by setting a hollow feeding adjustment block 100, the present invention realizes the adjustment of the thickness of the coating edge 102 through feeding and extrusion, which effectively improves the coating consistency.

[0058] The present invention also proposes an adjustment mechanism 10, which can be applied to a double-layer coating die head, a triple-layer coating die head or a multi-layer coating die head, and is not limited here.

[0059] Reference Figure 4 In one embodiment of the present invention, the adjustment mechanism 10 includes an adjustment block 100, a fixed base 200, an actuator 300, and a coupling 400; the fixed base 200 is adapted to be fixed on the coating die head; the actuator 300 is disposed on the fixed base 200; one end of the coupling 400 is connected to the output end of the actuator 300; the adjustment block 100 is connected to the other end of the coupling 400, and the adjustment block 100 is the aforementioned adjustment block 100.

[0060] In this embodiment, the actuator 300 can be a manually adjustable differential head or an automatically adjustable linear motor, etc. When a differential head is used as the actuator 300, the adjusting end of the differential head can be connected to the upper end of the rod 110 of the adjusting block 100 via a coupling 400. When a linear motor is used as the actuator 300, a displacement sensor and a drive board can be provided. The linear motor and the displacement sensor are respectively connected to the drive board. The linear motor can drive the adjusting block 100 to move via the coupling 400. The displacement sensor detects the adjustment amount of the adjusting block 100, and the drive board controls the linear motor to work according to the displacement signal output by the displacement sensor.

[0061] It should be noted that since the adjustment mechanism 10 proposed in this invention includes all the solutions of all embodiments of the adjustment block 100 described above, it has at least the same technical effects as the adjustment block 100 described above, and will not be described in detail here.

[0062] Please refer to Figure 2 , Figure 4 and Figure 5In one embodiment, when the adjusting block 100 is a hollow structure, the rod 110 of the adjusting block 100 is provided with a feeding channel, and the throttling block 120 of the adjusting block 100 is provided with a flow channel communicating with the discharge end of the feeding channel and a feeding port 120a communicating with the flow channel. In this case, the adjusting mechanism 10 may also include a connector 500 with a transition interface 500a, the connector 500 being provided on the feed end of the rod 110, and the transition interface 500a being adapted to communicate with the feeding valve 50 through a pipe. This improves the convenience of compensating for the slurry and makes assembly easier. In addition, it also enables the application of coatings such as insulating adhesive to the edge of the wet coating.

[0063] The present invention also proposes a coating die head.

[0064] Reference Figure 6 and Figure 7 In one embodiment of the present invention, the coating die head includes an adjustment mechanism 10, a first die body 20, and a second die body 30; the two adjustment mechanisms 10 located at the coating edge 102 are the aforementioned adjustment mechanisms 10; the first die body 20 is provided with a clearance hole at a position corresponding to the coating edge 102; the second die body 30 is connected and fixed to the first die body 20, and a gasket 40 is sandwiched between the first die body 20 and the second die body 30 to form a coating slit 20a communicating with the clearance hole; the adjustment mechanism 10 is disposed on the first die body 20 and extends into the coating slit 20a through the clearance hole.

[0065] In this embodiment, two sets of adjusting blocks 100 with elastic extrusion members 130 need to be set on the coating die head to correspond to the two sides of the wet coating, while the T blocks 101 of several adjusting mechanisms 10 located on the inner side of the coating can all adopt conventional structures.

[0066] In this embodiment, the gasket 40 may be provided with a receiving groove for accommodating the elastic extrusion member 130 of the adjustment mechanism 10, so that the elastic body 131 of the elastic extrusion member 130 is accommodated in the receiving groove during the pressing process, and then its deformable part 132 can further extrude the "bulging edge" at the coating edge 102 until it is flattened. By adopting this method, the consistency between the coating edge thickness and the coating inner thickness is further improved.

[0067] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. An adjusting block (100), characterized in that, include: A rod (110) has a first end and a second end opposite to each other, the first end of the rod (110) being adapted to be connected to the actuator (300) of the coating die head; A flow-blocking block (120), wherein the flow-blocking block (120) is integrally formed with the rod body (110) or fixed to the second end of the rod body (110); and An elastic extrusion member (130) is disposed on the bottom surface of the intercepting block (120). The elastic extrusion member (130) includes an elastic body (131) and a deformable part (132) connected to the elastic body (131). The deformable part (132) is bent toward the direction close to the rod (110). The elastic body (131) is adapted to be housed in the gasket (40) of the coating die head. The deformable part (132) is adapted to be disposed corresponding to the coating edge (102) and form its intercepting surface. One side of the bottom surface of the intercepting block (120) is provided with an inclined surface or an arc surface. The extension direction of the inclined surface or the arc surface is consistent with the bending direction of the deformable part (132). The deformable part (132) is attached to the inclined surface or the arc surface.

2. The adjusting block (100) as described in claim 1, characterized in that, The rod body (110) is provided with a feeding channel, the feeding end of the feeding channel is adapted to be connected to the feeding device, the intercepting block (120) is provided with a flow channel connected to the discharge end of the feeding channel and a feeding port (120a) connected to the flow channel, and the feeding port (120a) is adapted to be set corresponding to the coating edge (102).

3. The adjusting block (100) as described in claim 2, characterized in that, The feed inlet (120a) is located on the outside of the deformed part (132).

4. The adjusting block (100) as described in claim 3, characterized in that, The elastic body (131) is flat against the bottom surface of the intercepting block (120), and the plane where the feeding port (120a) is located is parallel to the plane where the elastic body (131) is located.

5. An adjustment mechanism (10), characterized in that, include: Adjustment block (100), wherein the adjustment block (100) is the adjustment block (100) as described in any one of claims 1 to 4; Fixing base (200), suitable for fixing to coating die head; An actuator (300) is disposed on the mounting base (200); and A coupling (400) is provided, one end of which is connected to the output end of the actuator (300), and an adjusting block (100) is connected to the other end of the coupling (400).

6. The adjusting mechanism (10) as described in claim 5, characterized in that, The rod (110) of the regulating block (100) is provided with a feeding channel, and the intercepting block (120) of the regulating block (100) is provided with a flow channel communicating with the discharge end of the feeding channel and a feeding port (120a) communicating with the flow channel. The regulating mechanism (10) also includes a converter (500) provided with a converter interface (500a). The converter (500) is provided on the feed end of the rod (110), and the converter interface (500a) is adapted to communicate with the feeding valve (50) through a pipe.

7. The adjusting mechanism (10) as described in claim 5, characterized in that, The actuator (300) is a differential head or a linear motor.

8. A coating die head, characterized in that, include: The two adjustment mechanisms (10) located at the coating edge (102) are the adjustment mechanisms (10) as described in any one of claims 5 to 7. The first mold (20) has clearance holes at positions corresponding to the coating edge (102); and The second mold (30) is connected and fixed to the first mold (20). A gasket (40) is sandwiched between the first mold (20) and the second mold (30) and a coating slit (20a) is formed to communicate with the clearance hole. The adjustment mechanism (10) is provided on the first mold (20) and extends into the coating slit (20a) through the clearance hole.

9. The coating die head as described in claim 8, characterized in that, The gasket (40) is provided with a receiving groove for accommodating the elastic extrusion member (130) of the adjustment mechanism (10).

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