CN213558056U

CN213558056U - Gasket, coating die head and coating machine

Info

Publication number: CN213558056U
Application number: CN202021738019.3U
Authority: CN
Inventors: 刘伟; 肖凤娇; 杨严; 程呈; 马成勇
Original assignee: Hubei Eve Power Co Ltd
Current assignee: Hubei Eve Power Co Ltd
Priority date: 2020-08-19
Filing date: 2020-08-19
Publication date: 2021-06-29
Anticipated expiration: 2030-08-19

Abstract

The utility model discloses a gasket, coating die head and coating machine belongs to battery production technical field. A gasket is used in a coating die head, a first cavity and a second cavity are formed in a lower die of the coating die head, a pump opening is formed in the first cavity, and the gasket is arranged on the peripheries of the first cavity and the second cavity; the gasket comprises a main plate extending along a first direction and a main flow baffle arranged on the main plate, and the main flow baffle is positioned right above the pump port; the main flow baffle extends along the second direction and completely covers the first chamber at least in the second direction; the first direction and the second direction are perpendicular to each other. The utility model discloses set up the main board that keeps off on the gasket, and then can slow down the velocity of flow of thick liquids, improved the mobile state of thick liquids in the die head, effectively avoid the production of sediment or gel, improved the homogeneity and the coating quality of coating, reduced maintenance and abluent frequency, improved production efficiency.

Description

Gasket, coating die head and coating machine

Technical Field

The utility model relates to a battery production technical field especially relates to a gasket, coating die head and coating machine.

Background

In the manufacturing process of lithium ion batteries, a battery base material is often coated by an extrusion coating process. Fig. 1 shows a coating die head commonly used in the prior art, which includes an upper die (not shown), a lower die 20 'and a gasket 10' sandwiched between the upper die and the lower die 20 ', wherein the gasket 10' can form a diversion trench 15 'at the edge of the lower die 20' so that slurry can be extruded from the diversion trench 15 'to complete coating, and the length of the diversion trench 15' is the coating width of the coating die head.

The lower die 20 'is provided with a cavity for buffering slurry, a slurry outlet is generally arranged in the middle of the cavity, and the slurry enters the cavity after being pumped out and then is extruded out from a diversion trench 15' at the edge of the cavity. However, the slurry pumped out has a large flow rate in the middle of the chamber, and the slurry at the two ends is retained due to the slow flow rate, so that precipitation or gelation occurs. Non-uniform flow rates can lead to coating density non-uniformity; the generation of precipitate or gel can form particle scratches on the battery substrate, which affects the coating quality; meanwhile, the die head is blocked by sediment or gel, and the cleaning and the slurry pumping in a reciprocating mode are frequently needed during maintenance, so that the production efficiency is influenced while raw materials are wasted.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a gasket, coating die head and coating machine can optimize the mobile state of thick liquids in the die head, promotes the even flow of thick liquids, effectively avoids the production of sediment or gel.

In order to realize the purpose, the following technical scheme is provided:

a gasket is used in a coating die head, a first cavity and a second cavity are formed in a lower die of the coating die head, a pump opening is formed in the first cavity, and the gasket is arranged on the peripheries of the first cavity and the second cavity; the gasket comprises a main plate extending along a first direction and a main flow baffle arranged on the main plate, and the main flow baffle is positioned right above the pump port; the main baffle plate extends along a second direction and completely covers the first chamber at least in the second direction; the first direction and the second direction are perpendicular to each other.

Optionally, the first chamber and the second chamber are both strip-shaped; the main baffle plate is located in the middle of the first chamber in the first direction.

Optionally, the main baffle partially covers the second chamber in the second direction.

Optionally, the main flow blocking plate is of a rectangular structure, and a first chamfer is arranged at a vertex angle of a free end of the main flow blocking plate.

Optionally, the gasket further includes two side plates disposed at two ends of the main plate at intervals along the first direction, and the side plates extend along the second direction;

the free end of each side plate is provided with a side baffle plate extending along the first direction, the two side baffle plates are arranged at intervals to form a diversion trench on the lower die, and slurry is extruded out of the diversion trench after sequentially passing through the first cavity and the second cavity.

Optionally, the side baffle has a first end and a second end spaced apart from each other along the second direction, and the first end is closer to the main plate than the second end; the first end of the side baffle is flush with the inner edge of the second chamber; or

The first end of the side baffle protrudes beyond an inner edge of the second chamber in the second direction.

Optionally, the size of the inner edge of the side baffle plate protruding out of the second chamber is smaller than the size of the second chamber in the second direction;

the side flow baffle is of a rectangular structure, and a second chamfer is arranged at the vertex angle of the free end of the side flow baffle.

Optionally, the main plate, the side plate, the main baffle plate and the side baffle plate are of an integrated structure.

A coating die head comprises the gasket, an upper die and a lower die, wherein the gasket is clamped between the upper die and the lower die.

A coating machine comprises the coating die head.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a set up the main board that keeps off on the gasket, the thick liquids that pump discharge mouth pumped are blockked the back by the main board that keeps off earlier and flow in the cavity again, and then can slow down the velocity of flow of thick liquids, have improved the mobile state of thick liquids in the die head, make thick liquids to the both sides of first cavity and second cavity even flow, effectively avoid the production of sediment or gel, and then improved the homogeneity and the coating quality of coating, reduced maintenance and abluent frequency, improved production efficiency.

Drawings

FIG. 1 is a schematic view of a portion of a prior art coating die;

FIG. 2 is a schematic diagram of a portion of a coating die in an embodiment of the present invention;

FIG. 3 is a top view of the structure shown in FIG. 2;

fig. 4 is a schematic structural view of a lower mold according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a gasket according to an embodiment of the present invention;

fig. 6 is a partially enlarged schematic view of a portion B in fig. 2.

Reference numerals:

10. 10' -a gasket; 20. 20' -lower die;

11-a main board; 12-side plates; 13-a main flow baffle; 14. 14' -side baffle plate; 15. 15' -a diversion trench; 16-mounting holes; 21-a first chamber; 22-a second chamber;

131-a first chamfer; 141-second chamfer.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

Referring to fig. 2 to 5, the present embodiment is directed to providing a shim for use in a coating die including an upper die (not shown) and a lower die 20, the shim 10 being sandwiched between the upper die and the lower die 20. A first cavity 21 and a second cavity 22 are formed in the lower die 20, and a pump opening is formed in the first cavity 21; gasket 10 fills up the periphery of locating first cavity 21 and second cavity 22, specifically includes mainboard 11 along the extension of first direction, is provided with main fender flow board 13 on the mainboard 11, and main fender flow board 13 is located the pump opening directly over, and main fender flow board 13 extends along the second direction, and covers first cavity 21 completely at least in the second direction to make the pump material pump out the back by the pump opening, can be blockked by main fender flow board 13, and then to the reposition of redundant personnel flow of both sides, flow to in the second cavity 22 simultaneously. In the present embodiment, the outer edges of the lower mold 20 and the spacer 10 are substantially rectangular, and therefore the first direction is defined as the longitudinal direction of the spacer 10 (i.e., the X direction in the drawing), and the second direction is defined as the width direction of the spacer 10 (i.e., the Y direction in the drawing). Further, the first chamber 21 and the second chamber 22 are both elongated and extend along the first direction, and the main baffle 13 is located at the middle position of the first chamber 21 in the first direction.

The gasket 10 of this embodiment is provided with the main baffle plate 13, and the slurry pumped out from the pump outlet is firstly blocked by the main baffle plate 13 and then flows in the cavity, so as to slow down the flow rate of the slurry, improve the flow state of the slurry in the die head, and promote the slurry to uniformly flow to the two sides of the first cavity 21 and the second cavity 22, thereby effectively avoiding the generation of precipitates or gels, further improving the coating uniformity and the coating quality, reducing the frequency of maintenance and cleaning, and improving the production efficiency.

Further, referring to fig. 2 and 3, the gasket 10 further includes two side plates 12 spaced apart from each other at two ends of the main plate 11 along a first direction, and the side plates 12 extend along a second direction, and the first direction is perpendicular to the second direction. Further, the free end of each side plate 12 is provided with a side baffle plate 14 extending along the first direction, the two side baffle plates 14 are spaced apart from each other to form a diversion trench 15 on the lower die 20, and the slurry flowing out of the second chamber 22 is finally extruded from the diversion trench 15. By changing the distance between the two side baffles 14, the length of the channels 15 and thus the coating width of the coating die can be changed. The side baffle plate 14 has a first end and a second end arranged at an interval along the second direction, and the first end is closer to the main plate 11 than the second end; in one embodiment, the first end of the side baffle 14 is flush with the inner edge of the second chamber 22; in another embodiment, the first end of the side baffle 14 protrudes beyond the inner edge of the second chamber 22 in the second direction; the purpose of the above arrangement is to avoid that the lower mold 20 ' protrudes from a portion of the first end of the side baffle 14 ' in the second direction (refer to the area a in fig. 1), if existing, to form a transverse flow channel, and the length of the transverse flow channel is generally greater than the length of the longitudinal flow channel at the diversion trench 15 ', so that slurry retention occurs on the transverse flow channel, and precipitation or gelation occurs. Here, the transverse direction refers to a first direction, and the longitudinal direction refers to a second direction. Further, the size of the inner edge of the side baffle plate 14 protruding the second chamber 22 is smaller than the size of the second chamber 22 in the second direction, i.e. the side baffle plate 14 cannot completely cover the second chamber 22 in the second direction, so as to avoid affecting the flow state of the slurry in the second chamber 22.

In specific implementation, the main baffle 13 may further extend along the second direction to partially cover the second chamber 22 along the second direction, so as to ensure that the slurry entering the second chamber 22 can flow uniformly to both sides under the blocking effect of the main baffle 13. Since the width of the first chamber 21 of the lower mold 20 is determined, the size of the main baffle 13 in the second direction can be substantially determined, and at this time, the size of the main baffle 13 in the first direction can be adjusted to make the flow rate of the slurry from the slurry outlet reach a desired state after passing through the main baffle 13. Further, referring to fig. 2 and 6, the main flow baffle 13 is a rectangular structure, the first chamfer 131 is disposed at the vertex angle of the free end of the main flow baffle 13, and the flowing state of the slurry in the second chamber 22 can be adjusted by changing the angle of the first chamfer 131, so that the flow velocity in each position of the second chamber 22 can be kept consistent, the slurry can be uniformly extruded from the diversion trench 15, and the coating uniformity can be improved.

Optionally, the main plate 11, the side plate 12, the main baffle plate 13 and the side baffle plate 14 are of an integrated structure and can be integrally formed through a stamping process; the unitary construction can improve the integrity of the gasket 10. Furthermore, the joints between the main plate 11, the side plates 12, the main baffle 13 and the side baffles 14 are chamfered to avoid stress concentration. Further, with continued reference to fig. 2 and 6, the side baffle plate 14 is also rectangular, one end of the two ends of the side baffle plate 14 disposed along the first direction is used for connecting with the side plate 12, the other end is a free end, and a second chamfer 141 is disposed at a vertex angle position of the free end of the side baffle plate 14, and the second chamfer 141 can adjust a flowing state of the slurry flowing out from the guiding groove 15, so as to ensure that the slurry is uniformly coated. Further, referring to fig. 2, a plurality of mounting holes 16 are provided on the main plate 11 and the side plate 12 for fixing the gasket 10 to the lower mold 20.

The embodiment also provides a coating die head, which comprises the gasket 10, an upper die (not shown in the figure) and a lower die 20, wherein the gasket 10 is clamped between the upper die and the lower die 20. Since the coating die includes the above-mentioned shim, the beneficial effects of the above-mentioned shim are at least obtained, and the description thereof is not repeated.

The present embodiment also provides a coater including the coating die described above. Since the coating machine includes the coating die described above, at least the advantageous effects of the coating die described above are obtained, and the description thereof will not be repeated.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims

1. A gasket is used in a coating die head, a first cavity (21) and a second cavity (22) are formed in a lower die (20) of the coating die head, a pump port is formed in the first cavity (21), and the gasket is characterized in that the gasket is arranged on the peripheries of the first cavity (21) and the second cavity (22); the gasket comprises a main plate (11) extending along a first direction and a main flow baffle (13) arranged on the main plate (11), and the main flow baffle (13) is positioned right above the pumping port; the main baffle (13) extends in a second direction and completely covers the first chamber (21) at least in the second direction; the first direction and the second direction are perpendicular to each other.

2. Gasket according to claim 1, characterized in that said first chamber (21) and said second chamber (22) are both elongated; the main baffle plate (13) is located at the middle position of the first chamber (21) in the first direction.

3. Gasket according to claim 1, characterized in that the main baffle (13) partly covers the second chamber (22) in the second direction.

4. Gasket according to claim 1 or 3, characterized in that the main baffle (13) has a rectangular structure, and the free end of the main baffle (13) is provided with a first chamfer (131) at a top corner thereof.

5. The gasket according to claim 1, further comprising two side plates (12) provided at both ends of the main plate (11) at intervals in the first direction, the side plates (12) extending in the second direction;

the free end of each side plate (12) is provided with a side baffle plate (14) extending along the first direction, the two side baffle plates (14) are arranged at intervals to form a diversion trench (15) on the lower die (20), and slurry passes through the first cavity (21) and the second cavity (22) in sequence and then is extruded out of the diversion trench (15).

6. The gasket according to claim 5, wherein the side baffle (14) has a first end and a second end spaced apart in the second direction, and the first end is closer to the main plate (11) than the second end; the first end of the side baffle (14) is flush with the inner edge of the second chamber (22); or

The first end of the side baffle (14) protrudes beyond an inner edge of the second chamber (22) in the second direction.

7. The gasket according to claim 6, characterized in that the dimension of the inner edge of the side baffle (14) protruding the second chamber (22) is smaller than the dimension of the second chamber (22) in the second direction;

the side flow baffle (14) is of a rectangular structure, and a second chamfer (141) is arranged at the vertex angle of the free end of the side flow baffle (14).

8. The gasket according to claim 5, characterized in that the main plate (11), the side plates (12), the main baffle plate (13) and the side baffle plates (14) are of a one-piece construction.

9. A coating die comprising a shim as claimed in any one of claims 1 to 8, and further comprising an upper die and a lower die (20), the shim being sandwiched between the upper die and the lower die (20).

10. A coater comprising the coating die of claim 9.