Coating die head

Abstract

The utility model discloses a coating die head which comprises a first die head, a second die head and a third die head, the second die head is provided with a second lip; a gasket is clamped between the second die head and the first die head, and a coating slit is defined by the second die head and the first die head; the first lip and the second lip form a coating lip; a first notch is formed in the position, located at the first lip, of the first die head, and a first embedding part is embedded in the first notch in a matched mode; the first lip is arranged on the first embedding part; wherein a plurality of first conical counterbores are formed in the first inlaying part, first fasteners are connected in the first conical counterbores in a matched mode, and the first inlaying part is connected with the first die head through the first fasteners. The technical problems that after an existing coating die head is adjusted and pushed by a push-pull rod to a certain displacement, displacement is likely to be generated between an inlay lip and a lower die head, dislocation fall is formed, the surface density consistency in the coating process becomes poor, and the coating quality is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating machines and coating machine accessories, and particularly relates to a coating die head. Background Art

[0002] Coating is a key technology in the production and manufacturing process of lithium-ion batteries. The consistency of the coating surface density will directly affect various performances of the battery, such as safety and capacity. Therefore, coating has very high requirements for the accuracy, reliability, etc. of the equipment used.

[0003] The existing coating die heads generally include an upper die head and a lower die head. A gasket is clamped between the upper die head and the lower die head to form a coating slit and a coating lip communicating with the coating slit. Two inlaid lips are symmetrically arranged on the upper die head and the lower die head respectively, and the coating lip is formed by enclosing the two inlaid lips. Generally, a push-pull rod assembly is arranged on the lower die head. By adjusting the push-pull rod assembly, the deformation part of the lower die head on one side of the inlaid lip deforms, and then drives the deformation of the inlaid lip on the lower die head to change the relative position between the two inlaid lips, so as to realize the control of the coating layer thickness. However, since the inlaid lip and the lower die head are of a split structure and need to be assembled and connected into one body through a connecting structure, the existing connecting structure is not firmly connected. After the push-pull rod is adjusted and pushed by a certain displacement, it is easy to cause displacement between the inlaid lip and the lower die head, forming a misalignment drop, resulting in poor consistency of the surface density during the coating process and affecting the coating quality. Summary of the Utility Model

[0004] The utility model provides a coating die head, which solves the technical problem that when the existing coating die head is adjusted and pushed by a certain displacement by a push-pull rod, it is easy to cause displacement between the inlaid lip and the lower die head, forming a misalignment drop, resulting in poor consistency of the surface density during the coating process and affecting the coating quality.

[0005] In view of this, the utility model provides a coating die head, comprising:

[0006] A first die head having a first lip;

[0007] A second die head having a second lip; a gasket is clamped between the second die head and the first die head, and a coating slit is formed by enclosing; the first lip and the second lip form a coating lip communicating with the coating slit; the first die head is provided with a first notch at the position of the first lip, and a first inlaid part is fitted and embedded in the first notch; the first lip is arranged on the first inlaid part; wherein, a plurality of first tapered countersunk holes are arranged on the first inlaid part, and first fasteners are fitted and connected in the first tapered countersunk holes, and the first inlaid part is connected with the first die head through the first fasteners.

[0008] Optionally, the included angle between the first notch and the coating slit is an acute angle.

[0009] Optionally, the first inlay part is integrally formed with the first lip.

[0010] Optionally, the first inlay part has a strip-shaped structure, and a plurality of the first countersunk conical holes are arranged side by side along the length direction of the first inlay part on the first inlay part;

[0011] And / or, the materials of the first inlay part and the first lip are both tungsten steel or ceramic.

[0012] Optionally, it further includes:

[0013] A push rod assembly, which is arranged on the first die head and is suitable for adjusting the surface density of the coating lip.

[0014] Optionally, the second die head is provided with a second notch at the second lip, and a second inlay part is fitted and embedded in the second notch; the second lip is arranged on the second inlay part; wherein, a plurality of second countersunk conical holes are arranged on the second inlay part, and second fasteners are fitted and connected in the second countersunk conical holes, and the second inlay part is connected to the second die head through the second fasteners.

[0015] Optionally, the included angle between the second notch and the coating slit is an acute angle.

[0016] Optionally, the second inlay part is integrally formed with the second lip.

[0017] Optionally, the second inlay part has a strip-shaped structure, and a plurality of the second countersunk conical holes are arranged side by side along the length direction of the second inlay part on the second inlay part;

[0018] And / or, the materials of the second inlay part and the second lip are both tungsten steel or ceramic.

[0019] Optionally, the second inlay part has the same structure as the first inlay part, the first lip has the same structure as the second lip, and the second inlay part and the first inlay part are symmetrically arranged in the vertical direction.

[0020] The technical solution of the present utility model has the following advantages:

[0021] The utility model fixes the first inlay part in the first notch by arranging a first tapered counterbore on the first inlay part and then cooperating with a first fastener adapted thereto and the first tapered counterbore. The tapered structure of the first tapered counterbore is used to cooperate with the first fastener to increase the friction during connection. Compared with the existing connection method using a cylindrical counterbore and a flat head screw, the cooperation gap is avoided, the connection stability is improved, and the dislocation drop between the first inlay part and the first die head is avoided when adjusting the coating thickness of the coating lip or under the action of external force during use (such as the relative movement between the first die head and the second die head or the frictional force generated by the slurry flow), ensuring the consistency of the surface density during the coating process. Moreover, the first inlay part is detachably connected to the first die head through the first fastener, which is convenient for installation and disassembly, and is convenient for replacing the first lip alone after wear, reducing the maintenance cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0023] Figure 1 FIG. 9 is a schematic structural view of the coating die head provided by the present utility model from the first perspective;

[0024] Figure 2 FIG. 13 is a schematic cross-sectional view of the first inlay part of the present utility model at the first tapered counterbore;

[0025] Figure 3 FIG. 17 is a schematic structural view of the coating die head provided by the present utility model from the second perspective;

[0026] Figure 4 FIG. 21 is a schematic structural view of the first inlay part of the present utility model from the third perspective.

[0027] DESCRIPTION OF THE REFERENCE NUMERALS:

[0028] 1. First die head; 2. Second die head; 3. Gasket; 4. First notch; 5. First inlay part; 6. First tapered counterbore; 7. First lip; 8. Second notch; 9. Second inlay part; 10. Second tapered counterbore; 11. Second lip; 12. Push-pull rod assembly. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative work belong to the scope of protection of the present utility model.

[0030] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0031] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", "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 or 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 the present utility model can be understood according to specific circumstances.

[0032] In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0033] Embodiment 1

[0034] Please refer to Figures 1 to 4 , this embodiment provides a coating die head, including: a first die head 1 having a first lip 7; a second die head 2 having a second lip 11; a gasket 3 is clamped between the second die head 2 and the first die head 1, and a coating slit is formed by enclosing; a coating lip communicating with the coating slit is formed by the first lip 7 and the second lip 11, and is suitable for coating through the coating lip; a first notch 4 is provided at the first lip 7 of the first die head 1, and a first embedding part 5 is fitted and embedded in the first notch 4; the first lip 7 is arranged on the first embedding part 5; wherein, a plurality of first tapered countersunk holes 6 are provided on the first embedding part 5, and first fasteners are fitted and connected in the first tapered countersunk holes 6, and the first embedding part 5 is connected to the first die head 1 through the first fasteners; a push rod assembly 12 is arranged on the first die head 1 and is suitable for adjusting the surface density of the coating lip.

[0035] It should be noted that the shape and size of the first fastener are adapted to those of the first countersunk conical hole 6; the first die head 1 and the second die head 2 can adopt the existing technologies, which will not be elaborated here one by one.

[0036] In this embodiment, by providing the first countersunk conical hole 6 on the first inlay part 5, a first fastener adapted thereto is inserted into the first countersunk conical hole 6, and the first inlay part 5 is fixed in the first groove by the first fastener. Since the opening of the first countersunk conical hole 6 is conical, compared with the existing connection method using a cylindrical countersunk hole and a flat head screw, the connection method of the first countersunk conical hole 6 cooperating with the first fastener provided in this embodiment increases the contact area between the first fastener and it, and the conical structure of the first countersunk conical hole 6 enables it to cooperate more closely with the first fastener during connection, avoiding the existence of a fitting gap, increasing the frictional force between the first fastener and the first countersunk conical hole 6, so that the first fastener stably fixes the first inlay part 5 in the first notch 4, avoiding the position of the first inlay part 5 shifting in the first notch 4 when adjusting the coating thickness of the coating lip or under the action of an external force during use (such as the relative movement between the first die head and the second die head or the frictional force generated by the slurry flow), that is, avoiding the difference in areal density caused by the drop between the first inlay part 5 and the first die head 1, and ensuring the consistency of the areal density during the coating process; in addition, the first inlay part 5 is detachably connected to the first die head 1 through the first fastener, which is convenient for installation and disassembly, and is convenient for replacing the first lip 7 alone after wear, reducing the maintenance cost.

[0037] Embodiment 2

[0038] As a further improvement to Embodiment 1, as Figure 1 and Figure 3 shown, the included angle between the first notch 4 and the coating slit is an acute angle.

[0039] In this embodiment, the first notch 4 is inclined relative to the coating slit. Compared with the structural form in which the first notch 4 is perpendicular to the coating slit, the contact area between the first inlay part 5 and the first notch 4 is increased. When the push-pull rod assembly 12 adjusts the deformation of the first die head 1 and then adjusts the position of the first lip 7, by increasing the frictional force between the first inlay part 5 and the first notch 4, it is ensured that the first inlay part 5 is stably fixed on the first die head 1, and it is not easy to be misaligned with the first die head 1 to generate a drop during the adjustment process, ensuring the consistency of the areal density during the coating process.

[0040] Specifically, as Figure 3 shown, the included angle between the first notch 4 and the coating slit is β.

[0041] On the basis of the above implementation manner, in a preferred implementation manner, as Figures 1 to 4As shown, the first inlay part 5 and the first lip 7 are integrally formed.

[0042] In this embodiment, the first inlay part 5 and the first lip 7 are integrally formed, which improves the structural strength and facilitates processing and production.

[0043] On the basis of the above embodiment, in a preferred embodiment, as Figure 1 and Figure 4 shown, the first inlay part 5 has a strip-shaped structure, and a plurality of first tapered countersunk holes 6 are arranged side by side along the length direction of the first inlay part 5 on the first inlay part 5.

[0044] In this embodiment, the first inlay part 5 is arranged in a strip-shaped structure, which is convenient for the first lip 7 to be arranged along the length direction of the first die head 1 and form a coating lip with the second lip 11 for coating. At the same time, a plurality of first tapered countersunk holes 6 are provided to cooperate with the first fasteners for fixation, further improving the stability of the first inlay part 5 connected in the first notch 4 of the first die head 1 and avoiding dislocation drop.

[0045] On the basis of the above embodiment, in a preferred embodiment, the materials of the first inlay part 5 and the first lip 7 are both tungsten steel or ceramic, that is, the first inlay part 5 is the first tungsten steel inlay part or the first ceramic inlay part, and the first lip 7 is the first tungsten steel lip or the first ceramic lip.

[0046] In this embodiment, the materials of the first inlay part 5 and the first lip 7 are tungsten steel or ceramic, which improves the wear resistance, extends the service life, and ensures the coating quality.

[0047] On the basis of the above embodiment, in a preferred embodiment, the coating die head further includes: a push-pull rod assembly 12, which is arranged on the first die head 1 and is suitable for adjusting the surface density of the coating lip.

[0048] It should be noted that the push-pull rod assembly 12 can adopt the existing technology and will not be elaborated here one by one.

[0049] In this embodiment, during coating, the slurry is coated through the coating lip from the coating slit. When it is necessary to adjust the surface density of the coating lip, the push-pull rod assembly 12 can be used to adjust the deformation and movement of the side of the first die head 1 with the first lip 7, so that the position of the first lip 7 changes relative to the position of the second lip 11, so as to correspondingly expand or contract the coating lip, and then change the surface density of the coating lip. Since the first lip 7 is fixed in the first notch 4 by the first tapered countersunk holes 6 cooperating with the first fasteners, even when the push-pull rod assembly 12 is used to adjust the deformation and offset of the position of the first lip 7 on the first die head 1, the first inlay part 5 is not easy to have a dislocation drop with the first die head 1, ensuring the consistency of the surface density during the coating process.

[0050] On the basis of the above embodiments, in a preferred embodiment, as Figure 1 and Figure 3 shown, the second die head 2 is provided with a second notch 8 at the second lip 11, and a second inlay part 9 is fitted and embedded in the second notch 8; the second lip 11 is arranged on the second inlay part 9; wherein, a plurality of second countersunk conical holes 10 are provided on the second inlay part 9, and second fasteners are fitted and connected in the second countersunk conical holes 10, and the second inlay part 9 is connected to the second die head 2 through the second fasteners.

[0051] In this embodiment, the second lip 11 is also detachably connected to the second die head 2 through the second inlay part 9, which is convenient for installation and disassembly, and is convenient for separately replacing the second lip 11 after wear, reducing the maintenance cost and increasing the service life; at the same time, the second inlay part 9 is fixed in the second notch 8 through the cooperation of the second countersunk conical holes 10 and the second fasteners. Since the opening of the second countersunk conical holes 10 is conical, the contact area between the second fasteners and it is increased, and when connecting, the conical structure of the second countersunk conical holes 10 enables it to cooperate more closely with the second fasteners, increasing the friction force between the second fasteners and the second countersunk conical holes 10, so that the second fasteners stably fix the second inlay part 9 in the second notch 8. When the first die head 1 and the second die head 2 move relative to each other, resulting in the second lip 11 being subjected to frictional force, or when the second lip 11 is subjected to the force of the slurry along the coating direction for a long time during the working process or other external forces, it can be avoided that the second inlay part 9 is misaligned with the second die head 2 and thus a drop occurs, ensuring the consistency of the surface density during the coating process.

[0052] On the basis of the above embodiments, in a preferred embodiment, as Figure 1 and Figure 3 shown, the included angle between the second notch 8 and the coating slit is an acute angle.

[0053] In this embodiment, the second notch 8 is inclined relative to the coating slit. Compared with the structural form in which the second notch 8 is perpendicular to the coating slit, the contact area between the second inlay part 9 and the second notch 8 is increased. By increasing the frictional force between the second inlay part 9 and the second notch 8, it is ensured that the second inlay part 9 is stably fixed on the second die head 2, and the second inlay part 9 is not easily misaligned with the second die head 2 to produce a drop, ensuring the consistency of the surface density during the coating process.

[0054] Specifically, as Figure 3 shown, the included angle between the second notch 8 and the coating slit is θ.

[0055] On the basis of the above embodiments, in a preferred embodiment, as Figure 1 and Figure 3As shown, the second inlay part 9 and the second lip 11 are integrally formed.

[0056] In this embodiment, the second inlay part 9 and the second lip 11 are formed separately, which improves the structural strength and is convenient for processing and production.

[0057] On the basis of the above embodiment, in a preferred embodiment, as Figure 1 shown, the second inlay part 9 has a strip-shaped structure, and a plurality of second countersunk conical holes 10 are arranged side by side along the length direction of the second inlay part 9 on the second inlay part 9.

[0058] In this embodiment, the second inlay part 9 is arranged in a strip-shaped structure, which is convenient for the second lip 11 to be arranged along the length direction of the second die head 2 and form a coating lip with the first lip 7 for coating. At the same time, a plurality of second countersunk conical holes 10 are provided to cooperate with the second fasteners for fixation, further improving the stability of the second inlay part 9 connected in the second notch 8 of the second die head 2 and avoiding dislocation and drop.

[0059] On the basis of the above embodiment, in a preferred embodiment, the materials of both the second inlay part 9 and the second lip 11 are tungsten steel or ceramic, that is, the second inlay part 9 is a second tungsten steel inlay part or a second ceramic inlay part, and the second lip 11 is a second tungsten steel lip or a second ceramic lip.

[0060] In this embodiment, the materials of the second inlay part 9 and the second lip 11 are tungsten steel or ceramic, which improves the wear resistance, increases the service life, and ensures the coating quality.

[0061] On the basis of the above embodiment, in a preferred embodiment, as Figure 1 and Figure 3 shown, the second inlay part 9 has the same structure as the first inlay part 5, the first lip 7 has the same structure as the second lip 11, and the second inlay part 9 and the first inlay part 5 are symmetrically arranged in the vertical direction.

[0062] It should be noted that the first notch 4 and the second notch 8 have the same structure and are symmetrically arranged in the vertical direction, that is, Figure 3 the included angle θ in

[0063] is equal to the included angle β.

[0064] Specifically, the first fastener is a screw or a bolt, and the head of the first fastener is a conical structure adapted to the first conical countersunk hole 6 .

[0065] Specifically, the second fastener is a screw or a bolt, and the head of the second fastener is a conical structure adapted to the second conical countersunk hole 10 .

[0066] Specifically, Figure 1 and Figure 3 As shown, the push-pull rod adjustment assembly is arranged on the side of the first die head 1 away from the first lip 7. The first die head 1 is divided into a fixed area and a deformation area. The deformation area is located on one side of the first lip 7. Under the action of the push-pull rod adjustment assembly, the deformation movement of the deformation area of ​​the first die head 1 can be adjusted, so that the first lip 7 of the first die head 1 moves, and the position relative to the second lip 11 of the second die head 2 changes.

[0067] The specific working principle of the coating die head provided in this embodiment is as follows: during coating, the slurry is coated through the coating slit and the coating lip. When it is necessary to adjust the surface density of the coating lip, the push-pull rod assembly 12 can be used to adjust the deformation and movement of one side of the first die head 1 with the first lip 7, so that the position of the first lip 7 changes relative to the position of the second lip 11, thereby correspondingly expanding or shrinking the coating lip, and then changing the surface density of the coating lip. By providing a first tapered counterbore 6 on the first inlay part 5, a first fastener adapted to it is inserted into the first tapered counterbore 6, and the first inlay part 5 is fixed in the first groove through the first fastener. Since the opening of the first tapered counterbore 6 is tapered, compared with the existing connection method using a cylindrical counterbore and a flat head screw, the connection method of the first tapered counterbore 6 provided in this embodiment and the first fastener increases the contact area between the first fastener and it, and the tapered structure of the first tapered counterbore 6 makes it fit more tightly with the first fastener during connection, avoiding the existence of a fitting gap, increasing the friction between the first fastener and the first tapered counterbore 6, so that the first fastener stably fixes the first inlay part 5 in the first notch 4, avoiding the position of the first inlay part 5 in the first notch 4 from shifting when the push-pull rod assembly 12 adjusts the position of the first lip 7 on the first die head 1, that is, avoiding the difference in surface density caused by the drop between the first inlay part 5 and the first die head 1, ensuring the consistency of the surface density during the coating process. The second inlay part 9 has the same structure as the first inlay part 5, ensuring the stability of its connection and avoiding the position of the second inlay part 9 from shifting relative to the second die head 2, further ensuring the consistency of the surface density during the coating process; in addition, the first inlay part 5 is detachably connected to the first die head 1 through the first fastener, and the second inlay part 9 is detachably connected to the second die head 2 through the second fastener, which is convenient for installation and disassembly, and is convenient for replacing the first lip 7 alone after wear. At the same time, the materials of the first inlay part 5, the second inlay part 9, the first lip 7 and the second lip 11 are made of tungsten steel or ceramic, which improves the wear resistance, reduces the maintenance cost, and increases the service life.

[0068] Obviously, the above embodiments are only examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A coating die head, characterized in that: include: A first die head (1) having a first lip (7); The second die head (2) has a second lip (11); a gasket (3) is sandwiched between the second die head (2) and the first die head (1), and a coating slit is formed by enclosing the second lip (7) and the second lip (11); the first die head (1) is provided with a first notch (4) at the first lip (7), and a first embedding portion (5) is fitted and embedded in the first notch (4); the first lip (7) is arranged on the first embedding portion (5); wherein a plurality of first conical countersunk holes (6) are provided on the first embedding portion (5), and a first fastener is fitted and connected in the first conical countersunk hole (6), and the first embedding portion (5) is connected to the first die head (1) via the first fastener.

2. The coating die head according to claim 1, characterized in that: The included angle between the first notch (4) and the coating slit is an acute angle.

3. The coating die head according to claim 1, characterized in that: The first embedding portion (5) and the first lip (7) are integrally formed.

4. The coating die head according to claim 1, characterized in that: The first embedding portion (5) is in the form of a long strip, and a plurality of the first conical countersunk holes (6) are arranged side by side on the first embedding portion (5) along the length direction of the first embedding portion (5); And / or, the first inlay portion (5) and the first lip (7) are both made of tungsten steel or ceramic.

5. The coating die head according to claim 1, characterized in that: Also includes: A push-pull rod assembly (12) is arranged on the first die head (1) and is suitable for adjusting the surface density of the coating lip.

6. The coating die head according to any one of claims 1 to 5, characterized in that: The second die head (2) is provided with a second notch (8) at the second lip (11), and a second embedding portion (9) is fitted and embedded in the second notch (8); the second lip (11) is arranged on the second embedding portion (9); wherein a plurality of second conical countersunk holes (10) are provided on the second embedding portion (9), and a second fastener is fitted and connected in the second conical countersunk holes (10), and the second embedding portion (9) is connected to the second die head (2) via the second fastener.

7. The coating die head according to claim 6, characterized in that: The included angle between the second notch (8) and the coating slit is an acute angle.

8. The coating die head according to claim 6, characterized in that: The second embedding portion (9) and the second lip (11) are integrally formed.

9. The coating die head according to claim 6, characterized in that: The second embedding portion (9) is in the form of a long strip, and a plurality of the second conical countersunk holes (10) are arranged side by side on the second embedding portion (9) along the length direction of the second embedding portion (9); And / or, the second inlay portion (9) and the second lip (11) are both made of tungsten steel or ceramic.

10. The coating die head according to claim 6, characterized in that: The second inlay portion (9) has the same structure as the first inlay portion (5), the first lip (7) has the same structure as the second lip (11), and the second inlay portion (9) and the first inlay portion (5) are symmetrically arranged in the vertical direction.

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