Wide lithium battery coating die head

Abstract

The utility model discloses a wide lithium battery coating die head which comprises an upper die head, a lower die head, a die head gasket and a partition mechanism, the rear end of the upper die head is hinged to the rear end of the lower die head, a cavity is arranged on the lower die head, the die head gasket is arranged between the upper die head and the lower die head, and the partition mechanism is arranged on the die head gasket. The partition mechanism comprises a pressing strip, a partition gasket, a plurality of flow blocking strips and a plurality of partition blocks, the pressing strip is fixed to the bottom of the die head gasket and located in the cavity, and the partition gaskets are fixed to the bottom of the pressing strip; the multiple partition blocks are fixed to the bottom of the partition gasket and embedded into the cavity to divide the cavity into multiple material cavities, and the flow stopping strips are arranged at the bottom of the partition gasket and located between every two adjacent partition blocks. According to the utility model, the slurry flow at the middle part and the two ends of the discharging lip is uniform, the requirement of density consistency of a coating surface is met, and the utilization rate of the wide coating die head is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating die heads, in particular to a wide-width lithium battery coating die head. Background Art

[0002] At present, the length of the wide-width coating die in the lithium battery industry is about 1.6 meters, which is a combination structure of a single feed and a through-single cavity. The existing coating die includes an upper die, a lower die and a gasket. The upper die is hinged on the lower die, the gasket is fixed to the bottom of the upper die, the lower die is provided with a cavity, and the rear end of the lower die is provided with a single feed port. Although this coating die can meet the use needs to a certain extent, its disadvantages are: the single feed port and the through-single cavity structure make more slurry flow into the central area of ​​the feed port, and less slurry flows into the two end areas of the die, resulting in a coating effect that is thick in the middle and thin on both sides, which does not meet the industry's high standard process requirements for surface density consistency, limiting the development of the industry's coating width. Utility Model Content

[0003] The utility model aims to overcome the deficiencies of the prior art and provide a wide-width lithium battery coating die head.

[0004] The technical solution of the utility model is as follows:

[0005] A wide-width lithium battery coating die head, comprising an upper die head, a lower die head, a die head gasket and a partition mechanism, wherein the rear end of the upper die head is hinged to the rear end of the lower die head, the lower die head is provided with a cavity, the die head gasket is placed between the upper die head and the lower die head, the partition mechanism comprises a pressure strip, a partition gasket, a plurality of flow-blocking strips and a plurality of partition blocks, the pressure strip is fixed to the bottom of the die head gasket and is located in the cavity, a plurality of the partition gaskets are fixed to the bottom of the pressure strip, a plurality of the partition blocks are fixed to the bottom of the partition gasket and are located in the cavity The mold cavity is embedded in the mold cavity and the mold cavity is divided into multiple material cavities. The baffle strip is arranged at the bottom of the partition gasket and is located between two adjacent partition blocks. An aisle is formed between the baffle strip and the bottom of the material cavity. A gap is formed between the two ends of the baffle strip and the partition blocks. The rear end of the lower die head is provided with multiple feed ports corresponding to the material cavities. The upper die head and the front end of the lower die head form a discharge lip. A channel connecting the discharge lip and the front end of the material cavity is formed between the upper die head and the lower die head.

[0006] Preferably, the plurality of partition blocks are distributed at equal distances on the bottom of the partition gasket.

[0007] Preferably, the wide-width lithium battery coating die head also includes a plurality of T-shaped rods and a plurality of moving mechanisms, the T-shaped rods are vertically slidably arranged on the upper die head, and the bottom ends thereof are placed in the channel, the moving mechanisms are mounted on the upper die head, and the moving ends thereof are connected to the T-shaped rods and drive the T-shaped rods to move up and down on the upper die head.

[0008] Preferably, the moving mechanism is a micrometer, which is mounted on the upper die head and has a fine-adjustment end connected to the top of the T-bar.

[0009] Preferably, the die gasket is fixed to the bottom of the upper die.

[0010] Preferably, the upper die head is hinged to the lower die head via a flip hinge.

[0011] Compared with the prior art, the beneficial effect of the utility model is that the utility model divides the mold cavity into multiple material cavities through a partition mechanism composed of a pressure strip, a partition gasket, a flow-blocking strip and a partition block, and is provided with multiple feed ports connected to the corresponding material cavities at the rear end of the lower die head. After the slurry from each feed port enters the corresponding material cavity, it flows from the rear end of the material cavity to the front end through the gaps between the two sides of the flow-blocking strip and the partition block and the aisle between the flow-block and the bottom of the material cavity, and then flows into the discharge lip along the channel, so that the slurry flow in the middle and both ends of the discharge lip is uniform, which meets the coating surface density consistency requirements; at the same time, the setting of multiple feed ports corresponding to the corresponding material cavities avoids the disadvantage that the traditional single feed port plus the through-single cavity structure requires a high-power screw pump to press the slurry out from the feed lip, thereby improving the utilization rate of the wide-width coating die head. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0013] Figure 1 This is a schematic diagram of the overall structure of the wide-width lithium battery coating die head of the utility model;

[0014] Figure 2 This is a cross-sectional view of the wide-width lithium battery coating die head of the utility model;

[0015] Figure 3 It is a structural schematic diagram of the material cavity of the utility model;

[0016] Figure 4 It is a structural schematic diagram of the partition mechanism of the utility model;

[0017] Figure 5 It is a schematic diagram of the slurry flow direction in the material chamber of the utility model. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0019] In order to illustrate the technical solution of the present invention, specific embodiments are provided below for illustration.

[0020] Example 1

[0021] like Figures 1 to 5 As shown, the wide-width lithium battery coating die of this embodiment includes an upper die 1, a lower die 2, a die gasket 3 and a partition mechanism 4, the rear end of the upper die 1 is hinged to the rear end of the lower die 2, the lower die 2 is provided with a cavity 21, the die gasket 3 is placed between the upper die 1 and the lower die 2, the partition mechanism 4 includes a pressure strip 41, a partition gasket 42, a plurality of flow blocking strips 43 and a plurality of partition blocks 44, the pressure strip 41 is fixed to the bottom of the die gasket 3 and is located in the cavity 21, a plurality of the partition gaskets 42 are fixed to the bottom of the pressure strip 41, and a plurality of the partition blocks 44 are fixed to the bottom of the partition gasket 42 and embedded in the The interior of the cavity 21 is divided into a plurality of material cavities 211, the baffle strip 43 is arranged at the bottom of the partition gasket 42 and is located between two adjacent partition blocks 44, a passage 45 is formed between the baffle strip 43 and the bottom of the material cavity 211, and a gap 46 is formed between the two ends of the baffle strip 43 and the partition blocks 44, a plurality of feed ports 22 corresponding to the material cavities 211 are provided at the rear end of the lower die head 2, a discharge lip 11 is formed at the front end of the upper die head 1 and the lower die head 2, and a channel 12 connecting the discharge lip 11 and the front end of the material cavity 211 is formed between the upper die head 1 and the lower die head 2. Among them, multiple partition blocks 44 are distributed at equal distances at the bottom of the partition gasket 42, dividing the mold cavity 21 into multiple material cavities 211 of the same length; the die head gasket 3 is fixed at the bottom of the upper die head 1, which is convenient for fixing the die head gasket 3; the upper die head 1 is hinged to the lower die head 2 through a flip hinge 5, and the upper die head 1 can be flipped on the lower die head 2 through the flip hinge 5.

[0022] During operation, the slurry enters the rear end of the corresponding material chamber 211 from multiple feed ports 22, a portion of the slurry flows toward the front end of the material chamber 211 along the notches 46 at both ends of the baffle strip, and the other portion flows toward the front end of the material chamber 211 along the passage 45 between the baffle strip 43 and the bottom of the material chamber 211. After the slurry is gathered at the front end of the material chamber 211, it flows into the channel 12 from the front end of the material chamber 211 and then flows out through the discharge lip 11. The wide-width lithium battery coating die of the present embodiment divides the mold cavity into multiple material cavities through a partition mechanism composed of a pressure strip, a partition gasket, a baffle strip and a partition block, and is provided with multiple feed ports connected to the corresponding material cavities at the rear end of the lower die. After the slurry from each feed port enters the corresponding material cavity, it flows from the rear end of the material cavity to the front end through the gaps between the two sides of the baffle strip and the partition block and the aisle between the baffle block and the bottom of the material cavity, and then flows into the discharge lip along the channel, so that the slurry flow in the middle and both ends of the discharge lip is uniform, which meets the coating surface density consistency requirement; at the same time, the setting of multiple feed ports corresponding to the corresponding material cavities avoids the disadvantage that the traditional single feed port plus the through-single cavity structure requires a high-power screw pump to press the slurry out of the feed lip, thereby improving the utilization rate of the wide-width coating die.

[0023] In this embodiment, the return pipes of multiple material chambers 211 are controlled to open and close by T-type three-way ball valves, so that different combinations of multiple material chambers can be connected in series to cope with different working conditions; each material chamber 211 has a pressure sensor to monitor the chamber pressure in real time, and to provide real-time feedback to adjust the screw pump pressure. The lower chamber is provided with a threaded push-pull rod, and the threaded push-pull rod includes a long rod and a short rod. One of the long rod and the short rod is selected according to the actual adjustment working condition. A nut is provided at the proximal end of the long rod, and the nut is pressed on the rear side of the lower mold. A first thread is provided at the distal end of the long rod, and a second thread is provided at the proximal end of the short rod. A third thread is provided at the lip of the lower mold, and a fourth thread is provided at the rear side of the lower mold. The first thread is screwed with the third thread, and the second thread is screwed with the fourth thread. The distal end of the short rod is pressed against the lip portion. When the lip flow rate needs to be increased, the long rod is rotated. Since the long rod and the lip part of the lower die are connected by the first thread and the third thread, the rotation of the long rod will pull the lip back, thereby increasing the lip opening; when the lip flow rate needs to be reduced, the short rod is rotated. Since the short rod and the rear part of the lower die are connected by the second thread and the fourth thread, the short rod rotates to push the lip part outward, making the lip opening smaller. The lip opening is effectively adjusted through the threaded pull rod, ensuring that the surface density consistency is within the process requirements.

[0024] In this embodiment, the wide-width lithium battery coating die head further includes a plurality of T-shaped rods 6 and a plurality of moving mechanisms 7. The T-shaped rods 6 are vertically slidably arranged on the upper die head 1, and the bottom end thereof is placed in the channel 12. The moving mechanism 7 is installed on the upper die head 1, and its moving end is connected to the T-shaped rod 6 and drives the T-shaped rod 6 to move up and down on the upper die head 1. The T-shaped rod 6 is driven to move in the vertical direction by the moving mechanism 7, and the height of the T-shaped rod 6 is finely adjusted to change the height of the channel 12, so as to realize the flow control of the slurry at the discharge lip 11. The moving mechanism 7 is a micrometer, which is a commonly used fine-tuning component. The micrometer is installed on the upper die head 1, and its fine-tuning end is connected to the top of the T-shaped rod 6 to fine-tune the height of the T-shaped rod 6.

[0025] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A wide-width lithium battery coating die head, characterized in that: The invention comprises an upper die head, a lower die head, a die head gasket and a partition mechanism, wherein the rear end of the upper die head is hinged to the rear end of the lower die head, a cavity is arranged on the lower die head, the die head gasket is arranged between the upper die head and the lower die head, and the partition mechanism comprises a pressure strip, a partition gasket, a plurality of flow blocking strips and a plurality of partition blocks, the pressure strip is fixed to the bottom of the die head gasket and is located in the cavity, a plurality of the partition gaskets are fixed to the bottom of the pressure strip, a plurality of the partition blocks are fixed to the bottom of the partition gasket and are embedded in the cavity The interior of the mold cavity is divided into multiple material cavities, the baffle strip is arranged at the bottom of the partition gasket and is located between two adjacent partition blocks, an aisle is formed between the baffle strip and the bottom of the material cavity, and gaps are formed between the two ends of the baffle strip and the partition blocks. The rear end of the lower die head is provided with multiple feed ports corresponding to the material cavities, the upper die head and the front end of the lower die head form a discharge lip, and a channel connecting the discharge lip and the front end of the material cavity is formed between the upper die head and the lower die head.

2. The wide-width lithium battery coating die head according to claim 1, characterized in that: The plurality of partition blocks are distributed at equal distances on the bottom of the partition gasket.

3. The wide-width lithium battery coating die head according to claim 1 or 2, characterized in that: The wide-width lithium battery coating die head also includes a plurality of T-shaped rods and a plurality of moving mechanisms. The T-shaped rods are vertically slidably arranged on the upper die head, and the bottom ends thereof are placed in the channel. The moving mechanisms are installed on the upper die head, and the moving ends thereof are connected to the T-shaped rods and drive the T-shaped rods to move up and down on the upper die head.

4. The wide-width lithium battery coating die head according to claim 3, characterized in that: The moving mechanism is a micrometer, which is installed on the upper die head and has a fine-adjustment end connected to the top of the T-bar.

5. The wide-width lithium battery coating die head according to claim 1 or 2, characterized in that: The die head gasket is fixed to the bottom of the upper die head.

6. The wide-width lithium battery coating die head according to claim 1 or 2, characterized in that: The upper die head is hinged to the lower die head through a flip hinge.

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