Flow regulating mechanism for slit coating die head

Abstract

The utility model relates to a flow adjusting mechanism for a slit coating die head, and belongs to the technical field of secondary battery coating. A groove is formed in the bottom of the upper die head, and a through hole is formed in the top wall of the groove; the lower die head is located at the bottom of the upper die head, and a slurry runner is formed between the lower die head and the upper die head; one end of the T-shaped block is located in the groove, and the other end of the T-shaped block penetrates through the through hole; the movable end of the micrometer is connected with one end, penetrating through the through hole, of the T-shaped block; the limiting block is connected to the T-shaped block and located at the top of the through hole, the size of the limiting block is larger than the diameter of the through hole, and the distance between the limiting block and the top of the upper die head is not larger than the height of the slurry runner. During use, when the T-shaped block moves up and down, the height of the corresponding slurry runner is also increased or reduced, so that the flow of fluid passing through the position in the longitudinal direction is controlled to be increased or reduced, meanwhile, when the limiting block abuts against the upper die head, the T-shaped block does not move downwards any more, and normal discharging of the slurry runner is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of secondary battery coating, and particularly relates to a slit coating die head flow rate adjusting mechanism. Background Art

[0002] During the production process of secondary batteries, the coating process mainly uses the slit extrusion method to coat the slurry on the current collector. The slit extrusion structure mainly includes an upper die head, a lower die head located below the upper die head, and a gasket connected between the upper die head and the lower die head. In order to coat the slurry on the substrate into the desired shape, part of the channel is generally left on the gasket as the slurry flow channel, and the height of this flow channel is the thickness of the gasket or the thickness of the milled space of the gasket. In order to adjust the amount of slurry coated on the substrate at any time through the height of the flow channel during the coating process, a groove is opened on the lower side of the upper die head in the direction of the front of the lower die head near the discharge port, that is, on the side close to the gasket. A T-shaped block is connected in the groove. A through hole is provided on the upper die head. One end of the T-shaped block is set as a stud, and the other end is set as a cylinder. The stud is located in the groove, and the cylinder passes through the through hole and exposes outside the upper die head.

[0003] In order to ensure the uniformity of the coating process, the slit extrusion die head generally uses a combination of a micrometer and a T-shaped block to finely adjust the size of the discharge flow channel or uses a push-pull rod to finely adjust the gap of the die head opening to further finely adjust the surface density of the coating layer. When using the combination of a micrometer and a T-shaped block to finely adjust the surface density, mainly by the operator turning the micrometer and checking the reading on the micrometer to confirm the pressing amount of the T-shaped block to avoid excessive pressing of the T-shaped block.

[0004] When the operator turns the micrometer, the amplitude is not easy to grasp, and it is very easy to be irregular or negligent. At this time, it is easier to cause the pressing amount of the T-shaped block to be too large, completely pressing down the T-shaped block, resulting in no material flowing out of the flow channel corresponding to the T-shaped block, leading to defects such as exposed foil on the film surface or scribing on the film surface. Summary of the Invention

[0005] The embodiment of the present application provides a slit coating die head flow rate adjusting mechanism to solve the problem in the related art that when the operator turns the micrometer, the amplitude is not easy to grasp, which easily causes the pressing amount of the T-shaped block to be too large, resulting in no material flowing out of the flow channel corresponding to the T-shaped block, leading to defects such as exposed foil on the film surface or scribing on the film surface.

[0006] The embodiment of the present application provides a slit coating die head flow rate adjusting mechanism, including: an upper die head with a groove at its bottom and a through hole provided on the top wall of the groove; a lower die head located at the bottom of the upper die head and forming a slurry flow channel with the upper die head; a T-shaped block, one end of which is located in the groove and the other end passes through the through hole; a micrometer, the movable end of which is connected to the end of the T-shaped block passing through the through hole; a limit block connected to the T-shaped block and located at the top of the through hole, the size of the limit block being larger than the diameter of the through hole, and the distance from the limit block to the top of the upper die head being not greater than the height of the slurry flow channel.

[0007] In some embodiments, the T-shaped block includes: a column head connected in the groove; a column rod, one end of which is connected to the column head and the other end passes through the through hole, and the limit block is connected to the column rod.

[0008] In some embodiments, a clamping groove is provided on the column rod, and the limit block is clamped in the clamping groove.

[0009] In some embodiments, the limit block is provided as a snap ring, and the snap ring is provided in a superior arc shape.

[0010] In some embodiments, the limit block is threadedly connected to the column rod.

[0011] In some embodiments, the limit block is provided as a limit nut, and a connecting groove is provided on the column rod, and the limit nut is connected in the connecting groove.

[0012] In some embodiments, the limit block is provided as a limit rod, the limit rod is threadedly connected to the column rod, and the diameter of the limit rod is larger than the diameter of the column rod.

[0013] In some embodiments, a reinforcing nut is threadedly connected to the column rod below the limit rod.

[0014] In some embodiments, an external thread section is provided at the top of the column rod, and an internal thread groove is provided at the bottom of the limit rod, and the external thread section is connected in the internal thread groove.

[0015] In some embodiments, an internal thread hole is provided at the top of the column rod, and an external threaded rod is provided at the bottom of the limit rod, and the external threaded rod is connected in the internal thread hole.

[0016] The beneficial effects brought by the technical solution provided by the present application include:

[0017] The embodiment of the present application provides a flow regulating mechanism for a slit coating die, which can drive the T-block to rise or fall from the groove by adjusting the micrometer, and then adjust the gap of the flow channel between the upper die and the lower die to become larger or smaller, so as to change the amount of slurry coated on the substrate; during the downward movement of the micrometer, the T-block is also moving. At this time, under the action of the limit block, when the limit block abuts against the top of the through hole, it means that the gasket is pressed down to the maximum moving distance, and then the T-block is continued to be pressed down. Therefore, under the limiting action of the limit block, excessive downward pressure of the T-block can be avoided, and undesirable conditions such as foil exposure or scratching on the film surface can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0019] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present application;

[0020] Figure 2 A schematic diagram of the structure of a display card slot provided in an embodiment of the present application;

[0021] Figure 3 A schematic diagram of the structure of a display clip provided in an embodiment of the present application;

[0022] Figure 4 A schematic diagram showing the structure of the limit rod and the reinforcement nut provided in the embodiment of the present application;

[0023] Figure 5 A schematic diagram showing the structure of a limit nut provided in an embodiment of the present application;

[0024] Figure 6 A schematic diagram showing the structure of the external thread segment and the internal thread groove provided in the embodiment of the present application;

[0025] Figure 7 A schematic diagram showing the structure of an internal threaded hole and an external threaded rod provided in an embodiment of the present application;

[0026] Reference numerals:

[0027] 1. Upper die head; 10. Groove; 11. Through hole; 2. Lower die head; 3. Gasket; 4. T-block; 40. Column head; 41. Column rod; 42. Coupling; 5. Micrometer; 60. Slot; 61. Snap ring; 70. Limit rod; 71. Reinforcement nut; 80. Limit nut; 81. Connecting groove; 90. External thread section; 91. Internal thread groove; 92. Internal thread hole; 93. External thread rod. Detailed implementation manners

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0029] The embodiment of the present application provides a slit coating die head flow rate regulating mechanism, which can solve the problem that it is not easy to grasp the amplitude when a person turns a micrometer, easily causing the excessive downward pressure of the T-shaped block, resulting in the complete blockage of the flow channel corresponding to the T-shaped block and causing defects such as foil exposure or film surface scribing on the film surface.

[0030] See Figures 1 to 7 As shown, the embodiment of the present application provides a slit coating die head flow rate regulating mechanism, including: an upper die head 1, a lower die head 2, a T-shaped block 4, a micrometer 5, and a limit block. A groove 10 is provided at the bottom of the upper die head 1, and a through hole 11 is provided on the top wall of the groove 10; the lower die head 2 is located at the bottom of the upper die head 1, and a slurry flow channel is formed between the lower die head 2 and the upper die head 1. One ends of the upper die head 1 and the lower die head 2 are designed to protrude obliquely from the main body; a gasket 3 is further provided between the upper die head 1 and the lower die head 2, and flow channels with different widths are designed on the gasket 3 according to different coating requirements. The initial height of the slurry flow channel is the thickness of the gasket. The slurry flow channel is an outlet channel, and the amount of slurry coated on the substrate can be adjusted at any time by the height of the slurry flow channel during the coating process; the groove 10 of the upper die head 1 is close to the lower die head 2 in front of the lower part of the outlet of the slurry flow channel. One end of the T-shaped block 4 is located in the groove 10, and the other end passes through the through hole 11. The diameter of the through hole 11 is larger than the diameter of the part of the T-shaped block 4 passing through the through hole 11; the movable end of the micrometer 5 is connected to one end of the T-shaped block 4 passing through the through hole 11 through a coupling 42; the limit block is connected to the T-shaped block 4 and is located at the top of the through hole 11, and the size of the limit block is larger than the diameter of the through hole 11, and the distance from the limit block to the top of the upper die head 1 is not greater than the height of the slurry flow channel.

[0031] During the use process, operate the micrometer 5 to drive the T-shaped block 4 to displace downward, so that the T-shaped block 4 presses downward, thereby reducing the height of the slurry flow channel here. The amount of slurry coated on the substrate is adjusted by adjusting the height of the slurry flow channel. However, since the distance from the limit block to the top of the upper die head 1 is not greater than the height of the slurry flow channel, when the limit block abuts against the upper die head 1, the downward pressure of the T-shaped block 4 reaches the maximum limit at this time, and the T-shaped block 4 cannot be pressed downward any further. Therefore, under the limitation of the limit block, it can effectively prevent the person from adjusting the T-shaped block 4 to be pressed downward excessively, resulting in the blockage of the slurry flow channel, and ensure the normal discharge of the slurry flow channel.

[0032] In this application, the provided T-shaped block 4 includes a column head 40 and a column rod 41. The column head 40 is connected within the groove 10, and the cross-section of the column head 40 is rectangular. One end of the column rod 41 is connected to the column head 40, and the other end passes through the through hole 11. The diameter of the column rod 41 is smaller than that of the column head 40. The column head 40 is successively passed through the groove 10 and the through hole 11 from the bottom of the upper die head 1 until the column head 40 is located within the groove 10 and the bottom of the column head 40 is flush with the bottom of the upper die head 1. The limit block is connected to the column rod 41, and the T-shaped block 4 is convenient to install.

[0033] In this application, in order to conveniently connect the limit block to the column rod 41, a clamping groove 60 is provided on the column rod 41, and the limit block is clamped within the clamping groove 60, thereby connecting the limit block by a clamping method. Specifically, the limit block is set as a snap ring 61, and the snap ring 61 is in a superior arc shape. The limit block is directly clamped and matched with the clamping groove 60, and since the snap ring 61 is in a superior arc shape, it is not easy to fall off, the structure is reliable, and the installation of the limit block is convenient and fast.

[0034] In this application, the limit block can also be installed by threadedly connecting the limit block to the column rod 41. When the limit block is threadedly connected to the column rod 41, the limit block can be directly set as a limit nut 80, and a connection groove 81 is provided on the column rod 41. The limit nut 80 is connected within the connection groove 81, and thus the use requirements can be met through the limit nut 80, and the operation is convenient.

[0035] The limit block can also be set as a limit rod 70. The limit rod 70 is threadedly connected to the column rod 41, and the diameter of the limit rod 70 is larger than that of the column rod 41. During installation, the column rod 41 can be first passed through the through hole 11, and then the limit rod 70 can be connected, and the installation and disassembly are convenient.

[0036] And when the micrometer 5 drives the T-shaped block 4 to press down, until the lower end surface of the limit rod 70 abuts against the upper die head 1, the T-shaped block 4 is effectively limited, preventing the T-shaped block 4 from pressing down excessively, and the threaded connection is convenient without the need to rely on other tools. And by the method of threadedly connecting the limit rod 70, the distance from the lower end surface of the limit rod 70 to the top of the upper die head 1 can be adjusted, so that the connection of the limit rod 70 is suitable for using gaskets 3 of different thicknesses.

[0037] In this application, when the thickness of the gasket 3 is changed, it is necessary to rotate and adjust the connection between the column rod 41 and the limit rod 70. At this time, the connection between the column rod 41 and the limit rod 70 will not be tight and there is a possibility of loosening, which will affect the adjustment accuracy of the micrometer 5. Therefore, in this application, a reinforcing nut 71 is also threadedly connected to the column rod 41 below the limit rod 70. At this time, the distance from the reinforcing nut 71 to the top of the upper die head 1 is not greater than the height of the slurry flow channel. When the gasket 3 is replaced, the limit distance of the T-shaped block 4 can be adjusted by directly rotating the reinforcing nut 71, further improving the operation convenience, and the structure of the reinforcing nut 71 is stable.

[0038] In this application, after the column rod 41 and the limit block are connected by threads, specifically, an external thread section 90 can be provided at the top of the column rod 41, and an internal thread groove 91 can be provided at the bottom of the limit rod 70. The external thread section 90 is connected in the internal thread groove 91, so as to realize the connection between the limit rod 70 and the column rod 41, and the connection is convenient.

[0039] Alternatively, an internal thread hole 92 can be provided at the top of the column rod 41, and an external threaded rod 93 can be provided at the bottom of the limit rod 70. The external threaded rod 93 is connected in the internal thread hole 92. This connection method can also realize the connection between the limit rod 70 and the column rod 41, and personnel can select according to the usage situation, which is convenient to use.

[0040] The implementation principle of the embodiment of this application is as follows: During the operation process, by adjusting the micrometer 5, the T-shaped block 4 is pressed down or raised from the groove 10, so as to effectively reduce or increase the height of the slurry flow channel, thereby reducing or increasing the amount of slurry coated on the substrate. During the downward movement of the T-shaped block 4, under the action of the limit block, when the limit block abuts against the top of the through hole 11, the T-shaped block 4 reaches the maximum downward pressing amount, ensuring that the slurry flow channel will not be completely closed. Therefore, under the limiting action of the limit block, it is possible to avoid excessive downward pressing of the T-shaped block 4, thereby effectively avoiding the occurrence of defects such as exposed foil on the film surface or scribing on the film surface due to too large a downward pressing amount of the T-shaped block 4.

[0041] In the description of this application, it should be noted that the orientation or positional relationship indicated by terms such as "upper" and "lower" is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to this application. Unless otherwise clearly specified and defined, the terms "installation", "connection" and "connection" 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 mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0042] It should be noted that in this application, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the said element.

[0043] The above are only specific embodiments of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application will not be limited to the embodiments shown herein, but rather will conform to the broadest scope consistent with the principles and novel features claimed herein.

Claims

1. A slot coating die flow regulating mechanism, characterized in that: include: An upper die head (1) has a groove (10) at its bottom, and a through hole (11) is provided on the top wall of the groove (10); A lower die head (2), which is located at the bottom of the upper die head (1) and forms a slurry flow channel between the lower die head (2) and the upper die head (1); A T-shaped block (4), one end of which is located in the groove (10) and the other end of which passes through the through hole (11); A micrometer (5), a movable end of which is connected to one end of the T-block (4) passing through the through hole (11); A limit block is connected to the T-block (4) and is located at the top of the through hole (11); the size of the limit block is larger than the diameter of the through hole (11), and the distance from the limit block to the top of the upper die head (1) is not greater than the height of the slurry flow channel.

2. The slot coating die flow regulating mechanism according to claim 1, characterized in that: The T-block (4) comprises: A column head (40) connected in the groove (10); A column rod (41) has one end connected to the column head (40) and the other end passing through the through hole (11); the limit block is connected to the column rod (41).

3. The slot coating die flow regulating mechanism according to claim 2, characterized in that: The column rod (41) is provided with a slot (60), and the limit block is locked in the slot (60).

4. The slot coating die flow regulating mechanism according to claim 3, characterized in that: The limit block is configured as a snap ring (61), and the snap ring (61) is configured in a superior arc shape.

5. The slot coating die flow regulating mechanism according to claim 2, characterized in that: The limiting block is threadably connected to the column rod (41).

6. The slot coating die flow regulating mechanism according to claim 5, characterized in that: The limiting block is configured as a limiting nut (80), a connecting groove (81) is provided on the column rod (41), and the limiting nut (80) is connected in the connecting groove (81).

7. The flow rate regulating mechanism of the slot coating die as claimed in claim 5, characterized in that: The limiting block is configured as a limiting rod (70), the limiting rod (70) is threadedly connected to the column (41), and the diameter of the limiting rod (70) is greater than the diameter of the column (41).

8. The slot coating die flow regulating mechanism according to claim 7, characterized in that: A reinforcing nut (71) is threadedly connected to the column rod (41) below the limiting rod (70).

9. The flow rate regulating mechanism of the slot coating die as claimed in claim 7, characterized in that: The top of the column rod (41) is provided with an external thread section (90), the bottom of the limiting rod (70) is provided with an internal thread groove (91), and the external thread section (90) is connected to the internal thread groove (91).

10. The slot coating die flow regulating mechanism according to claim 7, characterized in that: An internal threaded hole (92) is provided at the top of the column rod (41), and an external threaded rod (93) is provided at the bottom of the limiting rod (70), and the external threaded rod (93) is connected to the internal threaded hole (92).

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