Coating die head with adjustable cavity pressure

Abstract

The present invention discloses a coating die with adjustable cavity pressure. The coating die includes an upper die and a lower die, and the front end gap between the upper die and the lower die forms a slit coating port; a cavity pressure regulating mechanism is arranged in the coating die; the cavity pressure regulating mechanism includes an adjusting block; the adjusting block can be freely flipped forward and backward and embedded between the upper die and the material storage cavity, and the front end of the adjusting block has an adjusting end face corresponding to the front end inner wall surface of the material storage cavity; when the adjusting block flips forward and backward, the relative position of the adjusting end face of the adjusting block and the front end inner wall surface of the material storage cavity changes, so as to adjust the cavity pressure of the material storage cavity. The coating die is provided with a cavity pressure regulating mechanism, which can adjust the cavity pressure of the material storage cavity, so as to realize the real-time and flexible adjustment of the cavity pressure of the material storage cavity during the coating production process, so as to adjust the flow rate and flow rate of the coating slurry.

Description

Technical Field

[0001] The invention relates to the technical field of coating equipment, and in particular to a coating die head with adjustable cavity pressure. Background Art

[0002] Coating is the process of applying a paste or molten slurry to a substrate and forming a functional film on the surface of the substrate. Especially in the production process of lithium battery pole pieces, it is necessary to coat the slurry on the pole piece substrate. The uniformity of the coating surface density, lateral thickness consistency and accuracy are mainly determined by the slurry flow rate and flow rate before coating, and the slurry flow rate and flow rate are mainly determined by the storage chamber pressure and the coating port gap.

[0003] However, in the current coating die, since the cavity pressure is fixed after the shape and size of the storage cavity are determined, the cavity pressure of the storage cavity cannot be flexibly adjusted, and it is impossible to adjust the flow rate and flow rate of the coating slurry by flexibly adjusting the cavity pressure of the storage cavity, and the coating problem cannot be completely solved by adjusting the coating port gap alone. Therefore, it is necessary to develop a coating die with adjustable cavity pressure and adjustable coating port gap. Summary of the invention

[0004] The purpose of the present invention is to provide a coating die head with adjustable cavity pressure in view of the defects or shortcomings in the prior art. The coating die head is provided with a cavity pressure regulating mechanism, which can adjust the cavity pressure of the storage cavity, so as to realize the real-time and flexible adjustment of the cavity pressure of the storage cavity during the coating production process, so as to adjust the flow rate and flow of the coating slurry.

[0005] The purpose of the present invention is achieved through the following technical solutions.

[0006] A coating die with adjustable cavity pressure, comprising an upper die and a lower die, wherein the front end gap between the upper die and the lower die forms a slit coating port; a feed port is provided at the rear end of the lower die; a storage cavity is provided in the lower die, and the feed port, the storage cavity and the slit coating port are sequentially connected along a coating feeding direction; a cavity pressure regulating mechanism is provided in the coating die;

[0007] The cavity pressure regulating mechanism comprises an regulating block; the regulating block is embedded between the upper die head and the material storage cavity and can be freely flipped forward and backward, and the front end of the regulating block has an regulating end face corresponding to the front end inner wall surface of the material storage cavity; when the regulating block is flipped forward and backward, the relative position of the regulating end face of the regulating block and the front end inner wall surface of the material storage cavity changes, thereby adjusting the cavity pressure of the material storage cavity.

[0008] In a preferred embodiment, the upper die head is provided with a cavity pressure regulating groove corresponding to the material storage cavity;

[0009] The regulating block is embedded in the cavity pressure regulating groove and can be freely rotated forward and backward, and the portion of the regulating block protruding from the cavity pressure regulating groove extends into the material storage cavity.

[0010] In a preferred embodiment, the adjustment block is located correspondingly near the front end of the storage cavity.

[0011] In a preferred embodiment, the adjustment end surface and the front inner wall surface of the storage cavity are parallel to each other.

[0012] In a more preferred embodiment, the cross section of the regulating block is a polygon, and one side of the polygon is parallel to the front inner wall surface of the storage cavity.

[0013] In a more preferred embodiment, the cross-section of the regulating block is a large semicircle, and the straight edge of the large semicircle is parallel to the front inner wall surface of the storage cavity.

[0014] In a preferred embodiment, a flip adjustment member is provided on the side of the coating die head; the flip adjustment member is connected to the adjustment block and can drive the adjustment block to rotate forward and backward.

[0015] In a preferred embodiment, the flip adjustment member includes but is not limited to mechanical adjustment members such as a rotating handle, a rotating hand wheel, a cam handle, or automatic adjustment members such as a cylinder and a motor.

[0016] In a more preferred embodiment, the flip adjustment member includes a motor; the output end of the motor is transmission-connected to the adjustment block.

[0017] In a preferred embodiment, the flip adjustment member includes two flip adjustment members disposed on two sides of the coating die head; the two flip adjustment members are respectively connected to two ends of the adjustment block.

[0018] In a preferred embodiment, a gap adjustment mechanism is also provided on the upper die head for adjusting the gap of the slit coating port.

[0019] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0020] The coating die head of the present invention is provided with a cavity pressure regulating mechanism, which includes an regulating block, and the regulating block has an regulating end face corresponding to the front end inner wall surface of the storage cavity, and the regulating block can be freely flipped forward and backward, and when the regulating block is flipped forward and backward, the relative position between the regulating end face of the regulating block and the front end inner wall surface of the storage cavity will change, so that the regulating end face cooperates with the front end inner wall surface of the storage cavity to adjust the opening of the front end discharge port of the storage cavity, so that the front end discharge port of the storage cavity changes to become larger or smaller, thereby changing the cavity pressure of the storage cavity and adjusting the flow rate and flow of the coating slurry.

[0021] In addition, the coating die head can cooperate with the gap adjustment mechanism to effectively complete the real-time adjustment of the coating slurry flow rate and flow rate during the coating production process, so that during the coating production process, the slurry can reach a suitable flow rate and flow rate before coating, and the coating of slurries with different performances can be achieved. The coating surface density after coating is uniform, the lateral thickness is consistent, and the precision is high.

[0022] In addition, a flip adjustment member for driving the adjustment block to flip is provided on the side of the coating die head, so that the real-time adjustment of the coating slurry flow rate and flow rate can be conveniently, accurately and controllably completed effectively during the coating production process. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention in a specific embodiment;

[0024] Figure 2 It is a schematic diagram of the assembly structure of the present invention in a specific embodiment;

[0025] Figure 3 It is a rear view structural schematic diagram of the present invention in a specific embodiment;

[0026] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure along the AA direction;

[0027] Figure 5 Schematic diagram of the structure of the upper die head when viewed from above;

[0028] Figure 6 for Figure 5 A schematic diagram of the cross-sectional structure along the BB direction;

[0029] Figure 7 Schematic diagram of the top view of the lower die head;

[0030] Figure 8 for Figure 7 Schematic diagram of the cross-sectional structure along the CC direction;

[0031] Figure markings: 100-slit coating port, 1-upper die head, 10-upper die lip, 11-locking countersunk hole, 12-cavity pressure adjusting groove, 13-circulation discharge port, 2-lower die head, 20-lower die lip, 21-locking screw hole, 22-feeding port, 23-storage cavity, 24-connecting rod through hole, 3-gasket, 4-cavity pressure adjusting mechanism, 41-adjusting block, 410-adjusting end face, 42-connecting rod, 43-sealing ring, 44-sealing pressure plate, 45-fixed connecting rod, 46-coupling, 47-motor fixing seat, 48-motor, 5-gap adjusting mechanism, 51-pull rod, 52-adjusting micrometer, 53-mounting seat, 54-coupling, 6-connecting fixing block, 7-hinge. DETAILED DESCRIPTION

[0032] The technical solution of the present invention is further described in detail below in conjunction with specific embodiments and drawings, but the protection scope and implementation methods of the present invention are not limited thereto. In the description of specific embodiments, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship in which the product of the invention is usually placed when in use, and are only used to distinguish the description, only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the structure or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention, let alone an indication or implication of relative importance.

[0033] The coating die head capable of adjusting the cavity pressure in the vertical direction according to the embodiment of the present invention is shown in FIG. Figure 1 to Figure 3 As shown, it includes an upper die head 1 and a lower die head 2. See also Figure 5 and Figure 7 As shown, the upper die head 1 has a locking countersunk hole 11, and the lower die head 2 has a locking screw hole 21 corresponding to the locking countersunk hole 11. The locking countersunk hole 11 and the locking screw hole 21 are fixedly connected by a fastening bolt to lock the upper die head 1 and the lower die head 2. In addition, the upper die head 1 and the lower die head 2 are connected and locked by threading at the rear ends thereof in combination with a connecting fixing block 6, so that the upper die head 1 and the lower die head 2 maintain a stable relative position.

[0034] The rear ends of the upper die head 1 and the lower die head 2 are also hingedly connected by a hinge 7. After the fastening bolts in the locking countersunk hole 11 and the connecting fixing block 6 are loosened, the upper die head 1 and the lower die head 2 can be hingedly turned over to replace internal parts and clean the inside of the die head.

[0035] The front end of the upper die head 1 has an upper die lip 10, and the front end of the lower die head 2 has a lower die lip 20 corresponding to the upper die lip 10. The gap between the upper die lip 10 of the upper die head 1 and the lower die lip 20 of the lower die head 2 forms a slit coating port 100. During the coating operation, the slurry is extruded from the slit coating port 100 for coating. In addition, the upper die head 1 also has a circulation outlet 13 for circulating the slurry.

[0036] In an optional embodiment, a gasket 3 is sandwiched between the upper die head 1 and the lower die head 2, and the gasket 3 has at least one coating opening. The slit coating opening 100 is formed by the gap between the lower die lip 10 of the upper die head 1, the coating opening of the gasket 3, and the lower die lip 20 of the lower die head 2.

[0037] Specifically, a feed port 22 is provided at the rear end of the lower die head 2, and the slurry for coating enters the die head through the feed port 22. Figure 2 , Figure 4 , Figure 7 and Figure 8 As shown, a storage chamber 23 is provided in the lower die head 2, and in an optional embodiment, the storage chamber 23 is a strip-shaped chamber with its length direction along the left and right width directions. The storage chamber 23 is connected to the feed port 22, and a first flow channel connecting the storage chamber 23 and the slit coating port 100 is provided between the storage chamber 23 and the slit coating port 100, so that the feed port 22, the storage chamber 23 and the slit coating port 100 are connected in sequence along the coating feeding direction. During the coating operation, the slurry enters the die head from the feed port 22 and flows into the storage chamber 23; after the storage chamber 23 is full, the slurry overflows to the first flow channel, and after the inflowing slurry is evenly pressurized in the coating width direction through the first flow channel, it is extruded through the coating gap of the slit coating port 100 to achieve coating.

[0038] Moreover, a cavity pressure regulating mechanism 4 is provided on the upper die head 1 to adjust the cavity pressure of the storage cavity 23, so as to adjust the flow rate and flow rate of the coating slurry, thereby achieving the purpose of coating slurries with different performances and achieving good coating uniformity, uniform coating thickness, small fluctuation of coating surface density and high coating accuracy after coating.

[0039] In a specific embodiment, the cavity pressure regulating mechanism 4 includes an adjusting block 41, which is a bar-shaped block that can be accommodated in the material storage cavity 23, and the length direction is the same as the length direction of the material storage cavity 23. Along the axial direction of the adjusting block 41, the adjusting block 41 can be freely flipped forward and backward and embedded between the upper die head 1 and the material storage cavity 23. Specifically, the adjusting block 41 is located at a position close to the front end of the material storage cavity 23, that is, the adjusting block 41 is close to the front end discharge port of the material storage cavity 23.

[0040] In a preferred embodiment, see Figure 6 As shown, the upper die head 1 is provided with a cavity pressure regulating groove 12 corresponding to the storage cavity 23, and the cavity pressure regulating groove 12 is located above the front end of the corresponding storage cavity 23. The regulating block 41 is embedded in the cavity pressure regulating groove 12 and can rotate freely forward and backward, and the part of the regulating block 41 protruding from the cavity pressure regulating groove 12 spans the gap between the upper die head 1 and the lower die head 2 and extends into the storage cavity 23. Optionally, in order to prevent the slurry in the storage cavity 23 from overflowing from the two end faces of the regulating block 41 in the length direction and the inner side faces on both sides of the length direction of the storage cavity 23, a sealing sleeve can be provided between the two end faces of the regulating block 41 in the length direction and the inner side faces on both sides of the length direction of the storage cavity 23 for active sealing.

[0041] In addition, the front end of the adjusting block 41 has an adjusting end face 410 corresponding to the front inner wall surface of the storage chamber 23. In a preferred embodiment, the front inner wall surface of the storage chamber 23 is an inclined surface, and the adjusting end face 410 is a straight surface, and has the same inclination as the front inner wall surface of the storage chamber 23, so as to maintain parallelism with the front inner wall surface of the storage chamber 23. The adjusting end face 410 and the front inner wall surface of the storage chamber 23 are parallel to each other and form the discharge port of the storage chamber 23. The slurry overflowing from the storage chamber 23 flows out from between the adjusting end face 410 and the front inner wall surface of the storage chamber 23. When the adjusting block 41 is flipped forward and backward, the parallel correspondence between the adjusting end face 410 and the storage chamber 23 will change, so that the opening of the discharge port of the storage chamber 23 changes.

[0042] The cross section of the adjusting block 41 may be a polygon, and one side of the polygon is parallel to the front inner wall of the material storage cavity 23, or the cross section of the adjusting block 41 may be a large semicircle, and the straight side of the large semicircle is parallel to the front inner wall of the material storage cavity 23. Figure 2 and Figure 4 In the illustrated embodiment, the cross-section of the adjustment block 41 is a large semicircle, and the cavity pressure adjustment groove 12 is an arc-shaped groove adapted to the arc portion of the large semicircle. The arc portion of the adjustment block 41 can be freely rotatably embedded in the cavity pressure adjustment groove 12, and the straight edge is located in the storage cavity 23 and parallel to the front end inner wall of the storage cavity 23.

[0043] In this way, when the adjusting block 41 is flipped forward and backward, the relative position of the adjusting end face 410 of the adjusting block 41 and the front end inner wall surface of the storage chamber 23 changes, so that the adjusting end face 410 cooperates with the front end inner wall surface of the storage chamber 23 to adjust the opening of the front end discharge port of the storage chamber 23, so that the front end storage port of the storage chamber 23 changes to become larger or smaller, thereby changing the chamber pressure of the storage chamber 23, adjusting the chamber pressure of the storage chamber 23, and adjusting the flow rate and flow of the coating slurry.

[0044] Furthermore, a flip adjustment member is provided on the side of the coating die head. The flip adjustment member is connected to the adjustment block 41, and the flip adjustment member can apply an external driving force to the adjustment block 41 to drive the adjustment block 41 to flip forward and backward. Therefore, when performing coating production operations, the adjustment block 41 is driven to flip forward and backward by the flip adjustment member provided outside the coating die head, which facilitates the real-time adjustment of the cavity pressure of the storage cavity 23 during the coating production process, thereby being able to conveniently, accurately and controllably effectively complete the real-time adjustment of the coating slurry flow rate and flow rate during the coating production process.

[0045] In an optional embodiment, the flip adjustment member includes but is not limited to mechanical adjustment members such as a rotating handle, a rotating hand wheel, a cam handle, or automatic adjustment members such as a cylinder and a motor.

[0046] In a specific embodiment, the flip adjustment member includes a motor 48, and the output end of the motor 48 is connected to the adjustment block 41. Specifically, the output end of the motor 48 is connected to the adjustment block 41 through a connecting rod 42. Figure 8 As shown, a connecting rod through hole 24 for accommodating the connecting rod 42 is provided on the side wall of the lower die head 2 corresponding to the material storage chamber 23, and the adjusting block 41 is correspondingly located in the material storage chamber 23. The output end of the motor 48 is connected to one end of the connecting rod 42 through a coupling 46, and the other end of the connecting rod 42 extends into the material storage chamber 23 through the connecting rod through hole 24 and is fixedly connected to the adjusting block 41. When the motor 48 is working, the adjusting block 41 is driven to rotate by the coupling 46 and the connecting rod 42, that is, it is turned forward and backward. In addition, optionally, the motor 48 is arranged on a motor fixing seat 47, and the motor fixing seat 47 is connected and fixed to the side of the coating die head through a fixed connecting rod 45; and outside the connecting rod through hole 24 through which the connecting rod 42 passes, a sealing ring 43 is provided by pressing the sealing plate 44, and is locked and sealed with the lower die head 2 to prevent dust and pollution.

[0047] In a preferred embodiment, the flip adjustment member includes two flip adjustment members disposed on the two sides of the coating die head. The two flip adjustment members are respectively connected to the two ends of the adjustment block 41, and the two flip adjustments can flip the adjustment block 41 from the two ends of the adjustment block 41, so that the flipping action of the adjustment block 41 is smooth and can be kept synchronous.

[0048] In addition, in another preferred embodiment, see Figure 1 to Figure 4 As shown, the upper die head is also provided with a gap adjustment mechanism 5 for adjusting the gap between the upper die head 1 and the lower die head 2 near the slit coating port 100, thereby adjusting the flow rate and flow of the slurry. Moreover, optionally, the gap adjustment mechanism 5 includes a plurality of gap adjustment mechanisms evenly arranged along the coating width direction.

[0049] Specifically, the gap adjustment mechanism 5 includes an adjustment micrometer 52 , a mounting seat 53 , and a pull rod 51 that can press the gasket 3 to adjust the gap of the slit coating port 100 . Among them, the adjusting micrometer head 52 is fixedly mounted on the mounting seat 53, and the mounting seat 53 is fixedly mounted on the top of the upper die head 1; the upper die head 1 is provided with a gap adjusting rod hole for accommodating the pull rod 51 to pass through, one end of the pull rod 51 passes through the gap adjusting rod hole 15 on the upper die head 1 and extends to the outside of the top of the upper die head 1, and is connected to the adjusting micrometer head 52 through a coupling 54, and the other end of the pull rod 51 abuts against the gasket 3; the diameter of the end portion of the pull rod 51 abutting against the gasket 3 is larger than the diameter of the rod body, and a gap adjusting rod groove is provided coaxially with the gap adjusting rod hole on the side of the upper die head 1 close to the gasket 3, and the end portion of the pull rod 51 abutting against the gasket 3 can freely extend and retract in the gap adjusting rod groove; and a shaft sleeve is provided between the pull rod 51 and the gap adjusting rod hole to realize free rotation in the gap adjusting rod hole 15.

[0050] During operation, the micrometer head 52 is rotated to adjust the position of the pull rod 51 in the gap pull rod groove in the vertical direction, and the coating gap is adjusted by squeezing the gasket 3 by the pull rod 51. Therefore, in cooperation with the cavity pressure adjustment mechanism 4, the coating slurry flow rate and flow rate are effectively adjusted in real time during the coating production process, so that the slurry reaches a suitable flow rate and flow rate before coating, and the coating of slurries with different performances is realized, and the coating surface density after coating is uniform, the lateral thickness is consistent, and the precision is high.

[0051] The above embodiments are only preferred embodiments of the present invention and are only intended to further describe the technical solutions of the present invention in detail. However, the protection scope and implementation methods of the present invention are not limited thereto. Any changes, combinations, deletions, replacements or modifications that do not deviate from the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A coating die with adjustable cavity pressure, comprising an upper die and a lower die, wherein the front end gap between the upper die and the lower die forms a slit coating port; a feed port is provided at the rear end of the lower die; a storage cavity is provided in the lower die, and the feed port, the storage cavity and the slit coating port are sequentially connected along the coating feeding direction; characterized in that: A cavity pressure regulating mechanism is provided in the coating die head; The cavity pressure regulating mechanism comprises a regulating block; the regulating block can be freely flipped forward and backward and embedded between the upper die head and the material storage cavity, and the front end of the regulating block has an regulating end surface corresponding to the front end inner wall surface of the material storage cavity; When the adjusting block is flipped forward and backward, the relative position of the adjusting end surface of the adjusting block and the front inner wall surface of the material storage cavity changes, thereby adjusting the cavity pressure of the material storage cavity; The upper die head is provided with a cavity pressure regulating groove corresponding to the material storage cavity; the regulating block is embedded in the cavity pressure regulating groove so as to be freely rotatable forward and backward, and the portion of the regulating block protruding from the cavity pressure regulating groove extends into the material storage cavity; The regulating block is correspondingly located near the front end of the material storage cavity; The adjusting end surface and the front inner wall surface of the material storage cavity are parallel to each other.

2. A coating die head with adjustable cavity pressure according to claim 1, characterized in that: The cross section of the regulating block is a polygon, and one side of the polygon is parallel to the front inner wall surface of the material storage cavity.

3. The coating die head with adjustable cavity pressure according to claim 1, characterized in that: The cross section of the regulating block is a large semicircle, and the straight edge of the large semicircle is parallel to the front inner wall surface of the storage cavity.

4. The coating die head with adjustable cavity pressure according to claim 1, characterized in that: A flip adjusting piece is arranged on the side of the coating die head; the flip adjusting piece is connected with the adjusting block and can drive the adjusting block to rotate forward and backward.

5. A coating die head with adjustable cavity pressure according to claim 4, characterized in that: The flip adjustment member comprises a motor; the output end of the motor is transmission-connected with the adjustment block.

6. A coating die head with adjustable cavity pressure according to claim 4 or 5, characterized in that: The flip adjustment member comprises two flip adjustment members arranged on two sides of the coating die head; the two flip adjustment members are respectively connected to two ends of the adjustment block.

Images