Slit coating die head

Abstract

The utility model belongs to the technical field of battery manufacturing, and particularly relates to a slit coating die head which comprises an upper die head, a lower die head, a gasket and an adjusting mechanism, the gasket is arranged between the upper die head and the lower die head, so that a discharging slit is formed between the upper die head and the lower die head; the adjusting mechanism is arranged on the upper die head, the gasket is connected with the adjusting mechanism, and the adjusting mechanism can quantitatively adjust the position of the gasket in the first direction; compared with the prior art, the coating die head disclosed by the utility model has the advantages that the distance between the gasket and the lip can be quantitatively adjusted after the coating die head is abraded, and the distance between the gasket and the lip can be controlled within a set process range through the quantitative adjusting device after the lip is repaired, so that the coating die head can be continuously matched with the original gasket, and the production cost is saved.

Description

Technical Field

[0001] This utility model belongs to the field of battery manufacturing technology, and in particular relates to a slit coating die. Background Technology

[0002] Slit extrusion coating, a precision coating method, is widely used in the battery industry and is mainly achieved through slit extrusion dies. Existing slit extrusion dies generally include an upper die, a lower die, and a spacer located between the upper and lower dies. By designing different spacers, products of different sizes can be coated.

[0003] When installing the gasket, it should be kept as parallel as possible to the die lip, and the gasket's discharge side should maintain a certain inward reduction from the die lip. To ensure parallelism during installation, the positions of the locating pin on the die and the locating hole on the gasket are precisely selected during manufacturing through machining. The gasket is then fixed to the upper die by passing the internal locating pin through the locating hole on the gasket. However, during use, the die may wear down and require repair. During this process, the die lip shortens, resulting in a smaller gap between the gasket's discharge side and the lip. This leads to a mismatch between the repaired die and the original gasket, failing to meet the coating process requirements. Consequently, it is necessary to remake the gasket or manually adjust the gap between the gasket's discharge side and the lip using a feeler gauge. Since the die will undergo multiple repairs during its service life, remaking the gasket significantly increases production costs. Furthermore, manually adjusting the gap between the gasket's discharge side and the lip relies on experience and is difficult to guarantee accuracy, easily leading to dimensional abnormalities in the product and requiring readjustment. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned technical problems by providing a slit coating die head. After wear, the distance between the shim and the lip can be quantitatively adjusted. During die repair, the shortening distance of the die head only needs to be controlled within the quantitative adjustment range to continue to cooperate with the original shim, thus saving production costs.

[0005] In view of this, the present invention provides a slit coating die, comprising:

[0006] The upper die head, the lower die head, and the shim are arranged between the upper die head and the lower die head to form a discharge slit between them.

[0007] It also includes adjustment mechanisms;

[0008] The adjustment mechanism is located on the upper die head, and the shim is connected to the adjustment mechanism. The adjustment mechanism can quantitatively adjust the position of the shim in the first direction.

[0009] In this technical solution, the quantitative adjustment of the gasket by the adjusting mechanism means that the distance of each adjustment is a known amount, and it can ensure that the gasket moves parallel along the first direction to ensure the parallelism between the gasket's discharge side and the lip. After the die head is repaired, the manufacturer will provide a repair report, which contains the width of the die head in the first direction. By comparing it with the width of the die head in the first direction before the repair, the amount of width loss of the lip in the first direction can be known. The gasket can be adjusted away from the lip by a corresponding distance using the adjusting mechanism to ensure that the inward shrinkage of the gasket relative to the lip meets the process requirements.

[0010] In the above technical solution, the adjusting mechanism further includes:

[0011] A connector is provided on the side of the upper die head away from the lip. A slot is formed between the connector and the side wall of the upper die head away from the lip. The width of the slot in the first direction is adjustable. A gasket is connected to the connector.

[0012] Insert, the insert can be inserted into the slot in a second direction.

[0013] In the above technical solution, the connector further includes:

[0014] The L-shaped block has a through hole along the first direction on its vertical section. The insert is located between the vertical section of the L-shaped block and the upper die head, and the gasket is connected to the L-shaped block.

[0015] Threaded hole, the threaded hole is set on the side wall of the upper die head away from the lip;

[0016] The screw rod can pass through the through hole and then be threaded into the threaded hole.

[0017] In the above technical solution, the insert is further provided with a groove for the screw to pass through.

[0018] In the above technical solution, the bottom surface of the upper mold head is provided with a sliding groove, and the horizontal section of the L-shaped block can slide in the sliding groove along the first direction.

[0019] In the above technical solution, furthermore, a positioning post is provided on the bottom surface of the horizontal section of the L-shaped block, and a positioning hole is provided on the gasket for the positioning post to be inserted.

[0020] In the above technical solution, furthermore, the length of the positioning post is less than the thickness of the gasket.

[0021] In the above technical solution, the length of the positioning post is greater than the thickness of the gasket, and the surface of the lower die head near the gasket is provided with a slot for the positioning post to be inserted.

[0022] In the above technical solution, the gasket is further provided with multiple positioning holes at intervals along the third direction, and the upper mold head is provided with the same number of adjustment mechanisms at intervals along the third direction as the positioning holes.

[0023] In the above technical solution, the upper mold head and the lower mold head are further connected by a hinge mechanism.

[0024] The beneficial effects of this utility model are:

[0025] 1. By setting an adjustment mechanism on the upper die head to connect the gasket, the adjustment mechanism can quantitatively adjust the distance between the gasket and the lip in the first direction. In this way, after the die head is reworked, it is only necessary to compare the width loss of the die head in the first direction before and after the rework. When the gasket is installed, the overall position of the gasket in the first direction is adjusted by a quantitative adjustment through the adjustment mechanism, which can ensure that the distance between the gasket and the lip is within the specification range, and that the inward shrinkage of the gasket and the lip is consistent at all points in the third direction. This eliminates the need to re-prepare the gasket or manually adjust the inward shrinkage, and the die head can still match the gasket after multiple reworks, saving production costs.

[0026] 2. By designing the adjustment mechanism as a combination of connectors and inserts, a slot is formed between the connector and the upper die head. The thickness of each insert is the base of the shim adjustment distance. As needed, inserts of the appropriate thickness are inserted into the slot, so that the shim can fit with the die head after repair. The adjustment method is simple and the cost of use is low.

[0027] 3. By designing the connector as an L-shaped block, through hole, threaded hole, and screw, the width of the slot in the first direction can be adjusted by rotating the screw, thereby adjusting the position of the shim in the first direction. The adjustment operation is simple. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a three-dimensional structural diagram of the combined state of this utility model.

[0030] Figure 2 This is a side view of the combined structure of this utility model.

[0031] Figure 3 This is a three-dimensional structural diagram of the upper and lower mold heads in the separated state of this utility model.

[0032] Figure 4This is a schematic diagram of the three-dimensional structure of the gasket in this utility model.

[0033] Figure 5 This is a three-dimensional structural diagram of the adjustment mechanism in the first direction in the disassembled state of this utility model.

[0034] Figure 6 This is a three-dimensional structural diagram of the adjustment mechanism in the second direction in the split state of this utility model.

[0035] Figure 7 This is a schematic diagram of the insert groove provided on the lower mold head in this utility model.

[0036] The markings in the diagram are as follows:

[0037] 1. Upper die head; 2. Lower die head; 3. Gasket; 301. Positioning hole; 4. Connector; 401. L-shaped block; 402. Through hole; 403. Threaded hole; 404. Screw; 5. Insert; 501. Groove; 6. Slide groove; 7. Positioning pin; 8. Snap-in groove; 9. Hinge mechanism; X, first direction; Y, second direction; Z, third direction; Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] In the description of this utility model, it should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. For ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items, and therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0040] Example 1

[0041] This embodiment provides a slit coating die head, including: an upper die head 1, a lower die head 2, a gasket 3, and an adjustment mechanism;

[0042] Please see Figure 1 The lips of the upper mold head 1 and the lower mold head 2 are both distributed in the first direction X;

[0043] Please see Figure 2 The gasket 3 is placed between the upper die head 1 and the lower die head 2, so that a discharge slit is formed between the upper die head 1 and the lower die head 2;

[0044] The adjustment mechanism is set on the upper die head 1, and the shim 3 is connected to the adjustment mechanism. The adjustment mechanism can quantitatively adjust the position of the shim 3 in the first direction X.

[0045] In this embodiment, the quantitative adjustment of the gasket 3 by the adjustment mechanism means that the distance of each adjustment is a fixed base number or a multiple of that base number. For example, if the base number is 0.3 mm, then the distance that the gasket 3 can be adjusted each time is a multiple of 0.3 mm. Any structure in the prior art that can achieve this function can be used as the adjustment mechanism in this embodiment.

[0046] In this embodiment, for example, the process requirement is that the inward shrinkage of the gasket 3 relative to the lip is 0.1-0.4mm. The initial design (when the adjustment mechanism is not adjusted) has an inward shrinkage of 0.3mm for the gasket 3 and a width of 160mm in the first direction X. After the mold is modified, the width of the mold head in the first direction X is 159.6mm. If the adjustment mechanism is not used, the inward shrinkage between the gasket 3 and the lip is -0.1mm. At this time, the adjustment mechanism is used to adjust the gasket 3 so that the whole moves 0.4mm away from the lip. In this way, the inward shrinkage between the gasket 3 and the lip can still be maintained at 0.3mm, which meets the process requirements.

[0047] The technical solution in this embodiment enables the die head to still match the gasket 3 after multiple repairs, thus saving production costs.

[0048] Example 2

[0049] This embodiment provides a slit coating die head, which, in addition to the technical solutions of the aforementioned embodiments, also discloses a structure of an adjustment mechanism;

[0050] In this embodiment, the adjustment mechanism includes: a connector 4 and a insert 5;

[0051] Please see Figure 1 or Figure 3 The connector 4 is located on the side of the upper mold head 1 away from the lip. A slot is formed between the connector 4 and the side wall of the upper mold head 1 away from the lip. The width of the slot in the first direction X is adjustable. The gasket 3 is connected to the connector 4.

[0052] Insert 5 can be inserted into the slot along the second direction Y;

[0053] In this embodiment, the width of the slot in the first direction X is the distance between the connector 4 and the upper mold head 1. The distance between the connector 4 and the upper mold head 1 is adjustable. When the position of the connector 4 in the first direction X changes, it will adjust the position of the shim 3 in the first direction X.

[0054] In this embodiment, please refer to Figure 2 After the insert 5 is inserted into the slot, in the use state, the side of the insert 5 located in the first direction X is in contact with the side wall of the connector 4, and the other side wall of the insert 5 located in the first direction X is in contact with the side wall of the upper mold head 1. At this time, the insert 5 is pressed into the slot.

[0055] The number of inserts 5 can be multiple. Figure 2 The example shown shows two inserts 5, which means that the thickness of each insert 5 is the adjustment base. Figure 2 The adjustment distance shown is twice the base distance for shim 3;

[0056] Figure 2 The thickness of the inserts 5 shown is the same, meaning that in this case, the number of inserts 5 used is an integer multiple of the adjustment base. Alternatively, the thickness of different inserts 5 can also be different; specifically, inserts 5 of different thicknesses can be designed according to the amount of lip wear, for future use.

[0057] Example 3

[0058] This embodiment provides a slit coating die head, and based on embodiment 2, it also discloses a structure of the connector 4;

[0059] In this embodiment, the connector 4 includes: an L-shaped block 401, a threaded hole 403, and a screw 404;

[0060] Please see Figure 5 The vertical section of the L-shaped block 401 is located in the second direction Y, and the horizontal section of the L-shaped block 401 is located in the first direction X. A through hole 402 is provided on the vertical section of the L-shaped block 401 along the first direction X. The diameter of the through hole 402 is slightly larger than the diameter of the threaded end of the screw 404, but smaller than the diameter of the nut end of the screw 404. The insert 5 is located between the vertical section of the L-shaped block 401 and the upper die head 1. The gasket 3 is connected to the L-shaped block 401.

[0061] The threaded hole 403 is provided on the side wall of the upper die head 1 away from the lip, and the threaded hole 403 is adapted to the screw 404;

[0062] The threaded end of the screw 404 can pass through the through hole 402 and be threadedly connected to the threaded hole 403. The nut end of the screw 404 contacts the side wall of the vertical section of the L-shaped block 401 away from the insert 5.

[0063] In this embodiment, when the insert 5 is not needed, the screw 404 is tightened in the threaded hole 403 so that the surface of the vertical section of the L-shaped block 401 is in contact with the side wall of the upper mold head 1. At this time, the width of the slot in the first direction X is zero. After the mold head is repaired, the screw 404 is loosened as needed to separate the vertical section of the L-shaped block 401 from the upper mold head 1. At this time, the width of the slot in the first direction X is adjusted to be slightly larger than the required width, which is conducive to inserting the insert 5 into the slot. After all the required inserts 5 are inserted into the slot, the screw 404 is tightened again so that the vertical section of the L-shaped block 401 is in contact with the surface of the insert 5 in the first direction X. The surface of the insert 5 away from the vertical section of the L-shaped block 401 in the first direction X will be in contact with the side wall of the upper mold head 1. At this time, the position adjustment of the pad 3 in the first direction X is completed.

[0064] Example 4

[0065] This embodiment provides a slit coating die head, and based on embodiment 3, it also discloses a structure of the insert 5;

[0066] In this embodiment, please refer to Figure 5 The insert 5 is provided with a groove 501 for the screw 404 to pass through. The groove 501 penetrates the bottom surface of the insert 5 in the second direction Y. In this way, when the insert 5 is inserted into the slot, the insert 5 can surround the outside of the screw 404, so that the insert 5 can enter the slot with a larger area, thereby improving the connection stability of the shim 3 after position adjustment.

[0067] Example 5

[0068] This embodiment provides a slit coating die head, and based on embodiment 3, it also provides a way to connect the L-shaped block 401 to the upper die head 1;

[0069] In this embodiment, please refer to Figure 6 The bottom surface of the upper mold head 1 is provided with a sliding groove 6. The width of the sliding groove 6 in the third direction Z is adapted to the width of the horizontal segment of the L-shaped block 401 in the third direction Z. The horizontal segment of the L-shaped block 401 can slide in the sliding groove 6 along the first direction X.

[0070] When assembling the mold head, first slide the horizontal section of the L-shaped block 401 into the slide groove 6 along the first direction X, and then pass the screw 404 through the through hole 402 and connect it to the threaded hole 403. In this way, the positioning effect of the horizontal section of the L-shaped block 401 and the slide groove 6 can reduce the difficulty of assembling the mold head.

[0071] It should be noted that within the effective range of the position adjustment of the shim 3, the horizontal section of the L-shaped block 401 is always partially connected to the slide groove 6.

[0072] Example 6

[0073] This embodiment provides a slit coating die head, and based on embodiment 3, it also discloses a connection method between the L-shaped block 401 and the gasket 3;

[0074] In this embodiment, please refer to Figure 6 The bottom surface of the horizontal section of L-shaped block 401 is provided with positioning posts 7. Please refer to [link / reference]. Figure 4 The gasket 3 is provided with a positioning hole 301 for the positioning post 7 to be inserted;

[0075] When assembling the mold head, first adjust the distance between the L-shaped block 401 and the upper mold head 1, then fit the shim 3 with the upper mold head 1 so that the positioning pin 7 of the horizontal section of the L-shaped block 401 is inserted into the positioning hole 301 on the shim 3, and then connect the upper mold head 1 and the shim 3 with the lower mold head 2.

[0076] Example 7

[0077] This embodiment provides a slit coating die head, which, based on embodiment 6, further limits the length of the positioning post 7;

[0078] In this embodiment, the length of the positioning post 7 is less than the thickness of the gasket 3. At this time, the positioning hole 301 on the gasket 3 can be a blind hole or it can penetrate the upper and lower surfaces of the gasket 3. If the positioning hole 301 penetrates the upper and lower surfaces of the gasket 3, then the length of the positioning post 7 can be equal to the thickness of the gasket 3. If the positioning hole 301 is a blind hole, then the length of the positioning post 7 must be less than the depth of the positioning hole 301.

[0079] Example 8

[0080] This embodiment provides a slit coating die head. The difference from embodiment 7 is that in this embodiment, the length of the positioning post 7 is greater than the thickness of the gasket 3, and the surface of the lower die head 2 near the gasket 3 is provided with a slot 8 for the positioning post 7 to be inserted.

[0081] Please see Figure 7 The width of the slot 8 in the third direction Z is greater than or equal to the width of the positioning post 7 in the third direction Z, but the width of the slot 8 in the first direction X must be greater than the width of the positioning post 7 in the first direction X, and it must be ensured that the ends of the positioning post 7 can enter the slot 8 within the effective range of the position adjustment of the shim 3.

[0082] In this embodiment, the positioning hole 301 penetrates the upper and lower surfaces of the pad 3. After the positioning post 7 passes through the positioning hole 301, the part that extends beyond the pad 3 will enter the locking groove 8. The depth of the locking groove 8 must be greater than the length of the positioning post 7 that extends beyond the pad 3. This can prevent the positioning post 7 from damaging the lower die head 2.

[0083] Example 9

[0084] This embodiment provides a slit coating die and optimizes the structure of the slit coating die.

[0085] In this embodiment, please refer to Figure 4 The gasket 3 has multiple positioning holes 301 spaced at intervals along the third direction Z. Please refer to [link / reference]. Figure 5 or Figure 6 The upper mold head 1 is provided with the same number of adjustment mechanisms as the positioning holes 301 along the third direction Z. In this way, when assembling the mold head, multiple positioning pins 7 enter multiple positioning holes 301 at the same time, which improves the connection stability of the connector 4 to the gasket 3.

[0086] Example 10

[0087] This embodiment provides a slit coating die head and also discloses a connection method between the upper die head 1 and the lower die head 2;

[0088] In this embodiment, please refer to Figure 1 and Figure 3 The upper mold head 1 and the lower mold head 2 are connected by a hinge mechanism 9, and the hinge mechanism 9 can be selected from the products currently on sale above.

[0089] The hinge mechanism 9 includes two connecting ends and a connecting shaft. The two connecting ends are respectively connected to the upper die head 1 and the lower die head 2. The two connecting ends are rotatably connected by the connecting shaft, and the upper die head 1 can make circular motion with the connecting shaft as the center.

[0090] The embodiments of the present invention have been described above with reference to the accompanying drawings. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. This application is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of this application without departing from the spirit and scope of the claims, and all of these forms are within the protection scope of this application.

Claims

1. A slot coating die, comprising: The upper die head (1), the lower die head (2), and the gasket (3) are provided. The gasket (3) is disposed between the upper die head (1) and the lower die head (2) to form a discharge slit between the upper die head (1) and the lower die head (2). Its characteristic is that it further includes an adjustment mechanism; The adjustment mechanism is disposed on the upper mold head (1), and the gasket (3) is connected to the adjustment mechanism. The adjustment mechanism can quantitatively adjust the position of the gasket (3) in the first direction (X).

2. The slit coating die head according to claim 1, characterized in that, The adjustment mechanism includes: A connector (4) is disposed on the side of the upper die head (1) away from the lip. A slot is formed between the connector (4) and the side wall of the upper die head (1) away from the lip. The width of the slot in the first direction (X) is adjustable. The gasket (3) is connected to the connector (4). Insert (5) that can be inserted into the slot along the second direction (Y).

3. The slit coating die head according to claim 2, characterized in that, The connector (4) includes: L-shaped block (401), the vertical section of the L-shaped block (401) is provided with a through hole (402) along the first direction (X), the insert (5) is located between the vertical section of the L-shaped block (401) and the upper mold head (1), and the gasket (3) is connected to the L-shaped block (401); A threaded hole (403) is provided on the side wall of the upper die head (1) away from the lip. The screw (404) can pass through the through hole (402) and be threadedly connected to the threaded hole (403).

4. The slit coating die head according to claim 3, characterized in that: The insert (5) is provided with a groove (501) for the screw (404) to pass through.

5. The slit coating die head according to claim 3, characterized in that: The bottom surface of the upper mold head (1) is provided with a sliding groove (6), and the horizontal section of the L-shaped block (401) can slide in the sliding groove (6) along the first direction (X).

6. The slit coating die head according to claim 3, characterized in that: The bottom surface of the horizontal section of the L-shaped block (401) is provided with a positioning post (7), and the gasket (3) is provided with a positioning hole (301) for the positioning post (7) to be inserted.

7. The slit coating die head according to claim 6, characterized in that: The length of the positioning post (7) is less than or equal to the thickness of the gasket (3).

8. The slit coating die head according to claim 6, characterized in that: The length of the positioning post (7) is greater than the thickness of the pad (3), and the surface of the lower die head (2) near the pad (3) is provided with a slot (8) for the positioning post (7) to be inserted.

9. The slit coating die head according to claim 6, 7, or 8, characterized in that: The gasket (3) is provided with a plurality of positioning holes (301) spaced along the third direction (Z), and the upper mold head (1) is provided with the same number of adjustment mechanisms as the positioning holes (301) spaced along the third direction (Z).

10. The slit coating die head according to claim 1, characterized in that: The upper die head (1) and the lower die head (2) are connected by a hinge mechanism (9).

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