Discharging and recycling structure of coating die head

Abstract

The utility model relates to the technical field of coating accessories, and particularly discloses a coating die head discharged material recycling structure which comprises a material receiving box, a partition plate, a main slurry collecting box and a dispensing slurry collecting box, an opening is formed in one end of the material receiving box, and the material receiving box comprises a first side plate and a second side plate which are oppositely arranged in the first direction; the first side plate and the second side plate have a height difference in the third direction to form a first gap; the partition plate is arranged in the material receiving box, the partition plate is used for dividing the interior of the material receiving box into at least one main slurry recycling runner and at least one dispensing slurry recycling runner, a second notch is formed in the side, close to the first side plate, of the partition plate, and the first notch and the second notch jointly form a notch; the main slurry collection box is communicated with the main slurry recovery runner; and the dispensing slurry collection box is communicated with the dispensing slurry recovery runner. The slurry recycling device can realize synchronous recycling of different slurries, and can avoid the waste of the slurries caused by incapability of separation due to mixing.

Description

Technical Field

[0001] The utility model relates to the technical field of coating accessories, in particular to a coating die head discharge recovery structure. Background Art

[0002] Lithium batteries are batteries that use lithium metal or lithium alloys as the positive and negative electrode materials and a non-aqueous electrolyte solution. The primary purpose of lithium battery coating is to evenly apply the positive and negative electrode slurries (active materials) to the substrate to improve battery performance and safety; or to apply the adhesive slurry (insulating material) to specific locations on the battery for bonding, fixing, sealing, and insulation. To ensure the stability of the slurry coating, the coater requires a lip discharge test spray before coating. Existing slurry recycling equipment can only meet the requirements of applying one slurry at a time, such as the positive electrode slurry or the negative electrode slurry. When applying two slurries simultaneously, such as the positive electrode slurry and adhesive slurry, or the negative electrode slurry and adhesive slurry, the discharged slurry contains the positive and negative electrode slurries and adhesive slurry, and the mixed materials cannot be separated and recycled, resulting in a certain amount of slurry waste. Utility Model Content

[0003] The technical problem to be solved by the utility model is: how to realize the synchronous recovery of different slurries to avoid the waste of slurries due to the inability to separate them due to mixing.

[0004] In order to solve the above technical problems, the utility model provides a coating die head discharge recovery structure for recovering the coating slurry discharged from the die lip of the coating die head, comprising:

[0005] A material receiving box having a first direction, a second direction, and a third direction intersecting in pairs, wherein one end of the material receiving box is provided with an opening, and the material receiving box includes a first side panel and a second side panel arranged opposite to each other along the first direction, wherein the first side panel and the second side panel have a height difference in the third direction so as to form a first notch on the first side panel;

[0006] a partition, the partition being arranged inside the material receiving box, the partition being used to separate the interior of the material receiving box into at least one main slurry recovery channel extending along the third direction and at least one dispensing slurry recovery channel extending along the third direction, a second notch being provided on a side of the partition close to the first side plate near one end of the opening, the first notch and the second notch together forming a recess, the recess being used to match the die lip;

[0007] a main slurry collection box, the main slurry collection box being arranged at one end of the material receiving box away from the opening along the second direction, the main slurry collection box being in communication with the main slurry recovery channel; and

[0008] A glue dispensing slurry collection box is provided on the second side plate along the second direction, and the glue dispensing slurry collection box is connected to the glue dispensing slurry recovery channel.

[0009] Further preferably, the second notch extends along the opening in the first direction and the third direction.

[0010] Further preferably, the second side panel is provided with a discharge port, and the discharge port is used to connect the dispensing slurry recovery channel and the dispensing slurry collection box.

[0011] Further preferably, a first guide arc plate is provided in the dispensing slurry recovery channel, and the first guide arc plate extends from the opening to the discharge port.

[0012] Further preferably, the slope of the first guide arc plate in the third direction gradually increases from close to the opening to away from the opening.

[0013] More preferably, it further comprises a cover plate, which is hinged to the receiving box along the second direction and is used to seal the opening.

[0014] Further preferably, the cover plate is hinged to the second side plate, and the notch faces away from the hinge between the cover plate and the second side plate.

[0015] More preferably, it further includes a first material receiving barrel, and the main slurry collection box is provided with a first discharge port, and the first discharge port is connected to the first material receiving barrel pipeline.

[0016] Further preferably, a second guide arc plate extending along the second direction is provided in the main slurry collection box, the convex surface of the second guide arc plate faces the main slurry recovery channel, the first discharge port extends along the second direction, and the first discharge port is placed on the side of the second guide arc plate away from the main slurry recovery channel.

[0017] Further preferably, it further includes a second material receiving barrel, and the dispensing slurry collection box is provided with a second discharge port, and the second discharge port is connected to the second material receiving barrel pipeline.

[0018] Compared with the prior art, the coating die head discharge and recovery structure provided by the utility model has the following beneficial effects:

[0019] The utility model divides the interior of the material receiving box into a main slurry recovery flow channel and a dispensing slurry recovery flow channel by arranging a partition, and the first side plate and the second side plate have a height difference in the third direction to form a first notch on the first side plate, and the partition is provided with a second notch, and the first notch and the second notch are used to form a notch that matches the die lip. The arrangement of the partition and the notch can not only isolate different slurries, so that the main slurry and the dispensing slurry flow into the main slurry recovery flow channel and the dispensing slurry recovery flow channel respectively, but also avoid the different slurries coming out of adjacent discharge ports from being close to each other due to static electricity and fluid pressure difference, thereby realizing the synchronous recovery of different slurries and avoiding the waste of slurries due to mixing and separation; the main slurry is collected in the main slurry collection box through the main slurry recovery flow channel, and the dispensing slurry is collected in the dispensing slurry collection box through the dispensing slurry recovery flow channel, so as to facilitate the recycling of the collected main slurry and dispensing slurry. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a coating die head discharge and recovery structure described in this embodiment.

[0021] Figure 2 It is a side view of the material receiving box described in this embodiment.

[0022] Figure 3 This embodiment Figure 1 Enlarged schematic diagram of point A in the middle.

[0023] Figure 4 This embodiment Figure 1 Cross-sectional view of section BB.

[0024] Figure 5 This embodiment Figure 1 Cross-sectional view of section CC.

[0025] Figure 6 2 is a diagram showing the internal structure of the main slurry collection box in another embodiment.

[0026] In the picture:

[0027] 10. Material receiving box; 11. Opening; 12. First side panel; 121. First notch; 13. Second side panel; 14. Material outlet;

[0028] 20. Partition; 21. Second notch; 22. Notch;

[0029] 30. Main slurry recovery channel;

[0030] 40. Glue dispensing slurry recovery channel; 41. First guide arc plate;

[0031] 50. Cover plate;

[0032] 60. Main slurry collection box; 61. First discharge port; 62. Second guide arc plate;

[0033] 70. Glue dispensing material collection box; 71. Second discharge port;

[0034] 80. First receiving barrel;

[0035] 90. Second receiving barrel;

[0036] 100, die head lip;

[0037] X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0038] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention but are not intended to limit the scope of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like used in the present invention to indicate the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0041] Furthermore, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in the present invention based on the specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0044] Example 1

[0045] This embodiment provides a coating die discharge recovery structure for recovering coating slurry discharged from the die lip 100 of the coating die, which can separate and recover different slurries for reuse.

[0046] like Figure 1-Figure 2 As shown, in order to achieve the above-mentioned purpose, the coating die head discharge and recovery structure of this embodiment includes a material receiving box 10 and a partition 20, wherein the material receiving box 10 has a first direction X, a second direction Y and a third direction Z that intersect with each other, and the partition 20 extends along the first direction X and the second direction Y and is arranged inside the material receiving box 10. The partition 20 is used to separate the interior of the material receiving box 10 into at least one main slurry recovery channel 30 extending along the third direction Z and at least one glue dispensing slurry recovery channel 40 extending along the third direction Z. The partition 20 can isolate different slurries, so that the main slurry and the glue dispensing slurry flow into the main slurry recovery channel 30 and the glue dispensing slurry recovery channel 40 respectively, and can avoid the different slurries coming out of adjacent discharge ports from being close to each other and converging due to static electricity and fluid pressure difference.

[0047] In some embodiments, the partition 20 can be multiple, which can divide the interior of the material box 10 into multiple intervals to set the main slurry recovery flow channel 30 and the dispensing slurry recovery flow channel 40, so as to match the die lip 100 of different types of coating die heads; Figure 1As shown, the coating die discharge and recovery structure of this embodiment takes a three-film zone coating die as an example. Six partitions 20 are provided inside the material receiving box 10, thereby dividing the material receiving box 10 into three main slurry recovery channels 30 and four dispensing slurry recovery channels 40; for coating of various other film zone quantities, it is only necessary to increase or decrease the partitions 20 accordingly to control the number of channels.

[0048] In some embodiments, the first direction X, the second direction Y, and the third direction Z preferably intersect each other perpendicularly.

[0049] In some embodiments, see Figure 1-Figure 5 In order to facilitate matching the die lip 100 of the coating die head, an opening 11 is provided at one end of the material receiving box 10. The material receiving box 10 includes a first side plate 12 and a second side plate 13 arranged opposite to each other along the first direction X. The first side plate 12 and the second side plate 13 have a height difference in the third direction Z to form a first notch 121 on the first side plate 12. Near one end of the opening 11, a second notch 21 is provided on a side of the partition 20 near the first side plate 12. The first notch 121 and the second notch 21 together form a notch 22. The notch 22 Used to match the die lip 100; therefore, when using the coating die head discharge recovery structure, the recess 22 is pressed against the die lip 100 discharge position, each die lip 100 can correspond to one recess 22, and is connected with the main slurry recovery channel 30 or the dispensing slurry recovery channel 40 under the isolation effect of the partition 20, which can avoid the different slurries coming out of adjacent discharge ports from being close to each other due to static electricity and fluid pressure difference, thereby realizing the synchronous recovery of different slurries, and avoiding the waste of slurries due to mixing and inability to separate.

[0050] It should be noted that the dispensing slurry referred to in this embodiment can be ceramic slurry, insulating slurry or a second main slurry, etc., which is an auxiliary coating slurry for electrode production.

[0051] In some embodiments, the coating die discharge and recovery structure further includes a main slurry collection box 60 and a glue dispensing slurry collection box 70, wherein the main slurry collection box 60 is arranged at one end of the receiving box 10 away from the opening 11 along the second direction Y, and the glue dispensing slurry collection box 70 is arranged at the second side plate 13 along the second direction Y to avoid the main slurry collection box 60 and the glue dispensing slurry collection box 70 from interfering with the movement of the coating die.

[0052] In addition, the main slurry collection box 60 is connected to the main slurry recovery channel 30, and the dispensing slurry collection box 70 is connected to the dispensing slurry recovery channel 40; the main slurry is collected in the main slurry collection box 60 through the main slurry recovery channel 30, and the dispensing slurry is collected in the dispensing slurry collection box 70 through the dispensing slurry recovery channel 40, so as to facilitate the recycling of the collected main slurry and dispensing slurry.

[0053] In some embodiments, the second notch 21 extends along the opening 11 in the first direction X and the third direction Z, which is beneficial for the die lip 100 to extend into the receiving box 10 through the recess 22, thereby realizing the recovery of the slurry and avoiding leakage, overflow, etc.

[0054] In some embodiments, the second side panel 13 is provided with a discharge port 14, which is used to connect the glue dispensing slurry recovery channel 40 and the glue dispensing slurry collection box 70; specifically, a first guide arc plate 41 is provided in the glue dispensing slurry recovery channel 40, and the first guide arc plate 41 extends from the opening 11 to the discharge port 14; thus, by providing the first guide arc plate 41 in the glue dispensing slurry recovery channel 40, the glue dispensing slurry can be quickly diverted to the discharge port 14 in time and collected in the glue dispensing slurry collection box 70, so as to avoid the glue dispensing slurry from sticking or solidifying in the glue dispensing slurry recovery channel 40 for a long time, thereby increasing the subsequent cleaning work.

[0055] In some embodiments, in order to further improve the recovery efficiency of the slurry, the slope of the first guide arc plate 41 in the third direction Z is gradually increased from close to the opening 11 to away from the opening 11, so that the slurry can flow quickly along the first guide arc plate 41 to the discharge port 14, thereby reducing the residence time of the slurry in the dispensing slurry recovery channel 40.

[0056] In some embodiments, the coating die discharge and recovery structure further includes a cover plate 50, which is hinged to the receiving box 10 along the second direction Y, and the cover plate 50 is used to seal the opening 11; specifically, the cover plate 50 is hinged to the second side plate 13, and the recess 22 faces away from the hinge between the cover plate 50 and the second side plate 13; by setting the cover plate 50, the opening 11 can be sealed, and it is opened when it is necessary to clean the die lip 100 or clean the recovery flow channel inside the receiving box 10, and closed when not needed to isolate external foreign matter and prevent the recovered slurry from being contaminated.

[0057] In some embodiments, the coating die head discharge and recovery structure also includes a first material receiving barrel 80, and the main slurry collection box 60 is provided with a first discharge port 61, and the first discharge port 61 is connected to the first material receiving barrel 80 through a pipeline. By setting the first material receiving barrel 80 to receive and store the slurry in the main slurry collection box 60, it is beneficial to recover and recycle the main slurry without the need to frequently move the material receiving box 10.

[0058] Similarly, the coating die head discharge and recovery structure also includes a second material receiving barrel 90, and the glue slurry collection box 70 is provided with a second discharge port 71, and the second discharge port 71 is connected to the second material receiving barrel 90 through a pipeline. By setting up the second material receiving barrel 90 for receiving and storing the slurry in the glue slurry collection box 70, it is beneficial to recover and recycle the glue slurry without the need to frequently move the material receiving box 10.

[0059] In other embodiments, the coating die discharge recovery structure can be integrally formed of polyethylene material, polytetrafluoroethylene material or Teflon material, and can be selected according to the properties of the slurry. In this embodiment, the hardness of the polyethylene material, polytetrafluoroethylene material or Teflon material is lower than the hardness of the coating die material, and will not cause damage to the die lip 100.

[0060] Example 2

[0061] Compared with Example 1, the difference between Example 2 and Example 1 is:

[0062] like Figure 6 As shown, in order to further improve the recovery efficiency of the main slurry, a second guide arc plate 62 extending along the second direction Y can be further provided in the main slurry collection box 60. The second guide arc plate 62 can play a role in draining and collecting the main slurry.

[0063] In some embodiments, the convex surface of the second guide arc plate 62 faces the main slurry recovery channel 30, the first discharge port 61 extends along the second direction Y, and the first discharge port 61 is placed on the side of the second guide arc plate 62 away from the main slurry recovery channel 30; thus, by adopting the second guide arc plate 62 with the convex surface facing the main slurry recovery channel 30, the main slurry can be quickly drained to the bottom of the main slurry collection box 60, and can be discharged through the first discharge port 61, thereby improving the recovery efficiency of the main slurry.

[0064] In some embodiments, there are two second guide arc plates 62 and they are symmetrically arranged in the main slurry collection box 60, so that the cross-sectional width inside the main slurry collection box 60 decreases from top to bottom. On the one hand, the arrangement of two second guide arc plates 62 can play the role of diversion and convergence. On the other hand, the reduction of the cross-sectional width from top to bottom can improve the efficiency of discharging the main slurry to the first receiving barrel 80, and can reduce the residual amount of the main slurry in the main slurry collection box 60.

[0065] When the coater needs lip discharge before coating, such as Figures 1-6 As shown, close the cover 50 to isolate external foreign matter, press the recess 22 against the discharge position of the die lip 100, start the coater to start discharging, because the setting of the partition 20 and the recess 22 can both isolate different slurries, and the main slurry is collected through the main slurry recovery channel 30 to be stored in the main slurry collection box 60, and is transported to the first receiving barrel 80 through the first discharge port 61. The dispensing slurry flows along the first guide arc plate 41 in the dispensing slurry recovery channel 40 to the discharge port 14, and finally converges to the dispensing slurry collection box 70 for storage, and is transported to the second receiving barrel 90 through the second discharge port 71, thereby completing the collection and storage of the die lip 100 before coating, and open the cover 50 when it is necessary to clean the die lip 100 or the inside of the receiving box 10.

[0066] In summary, the embodiment of the present invention provides a coating die head discharge recovery structure, which divides the interior of the material receiving box 10 into a main slurry recovery flow channel 30 and a dispensing slurry recovery flow channel 40 by setting a partition 20, and the first side plate 12 and the second side plate 13 have a height difference in the third direction Z to form a first notch 121 on the first side plate 12, and the partition 20 is provided with a second notch 21. The first notch 121 and the second notch 21 are used to form a notch 22 that matches the die lip 100. The setting of the partition 20 and the notch 22 can not only isolate different slurries, but also make the first notch 121 and the second notch 21 match the die lip 100. The main slurry and the glue dispensing slurry flow into the main slurry recovery channel 30 and the glue dispensing slurry recovery channel 40 respectively, which can also prevent different slurries coming out of adjacent discharge ports from being close to each other due to static electricity and fluid pressure difference, thereby realizing the synchronous recovery of different slurries and avoiding the waste of slurries due to mixing and separation; the main slurry is collected in the main slurry collection box 60 through the main slurry recovery channel 30, and the glue dispensing slurry is collected in the glue dispensing slurry collection box 70 through the glue dispensing slurry recovery channel 40, so as to facilitate the recycling of the collected main slurry and glue dispensing slurry.

[0067] The above description is only a preferred embodiment of the present invention. It should be noted that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention. The basic principles, main features and advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above preferred embodiments. The examples should be regarded as illustrative and non-restrictive. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present invention.

[0068] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A coating die head discharge recovery structure for recovering coating slurry discharged from a die lip (100) of a coating die head, characterized in that: include: A material receiving box (10) having a first direction (X), a second direction (Y), and a third direction (Z) intersecting in pairs, an opening (11) being provided at one end of the material receiving box (10), the material receiving box (10) comprising a first side plate (12) and a second side plate (13) arranged opposite to each other along the first direction (X), the first side plate (12) and the second side plate (13) having a height difference in the third direction (Z) so as to form a first notch (121) on the first side plate (12); a partition (20), the partition (20) being arranged inside the material receiving box (10), the partition (20) being used to separate the interior of the material receiving box (10) into at least one main slurry recovery channel (30) extending along the third direction (Z) and at least one dispensing slurry recovery channel (40) extending along the third direction (Z), a second notch (21) being provided on a side of the partition (20) close to the first side plate (12) near one end of the opening (11), the first notch (121) and the second notch (21) together forming a notch (22), the notch (22) being used to match the die lip (100); a main slurry collection box (60), the main slurry collection box (60) being arranged at one end of the material receiving box (10) away from the opening (11) along the second direction (Y), the main slurry collection box (60) being in communication with the main slurry recovery channel (30); and A glue slurry collection box (70), the glue slurry collection box (70) is arranged on the second side plate (13) along the second direction (Y), and the glue slurry collection box (70) is connected to the glue slurry recovery channel (40).

2. A coating die head discharge recovery structure according to claim 1, characterized in that: The second notch (21) extends along the opening (11) in the first direction (X) and the third direction (Z).

3. A coating die head discharge recovery structure according to claim 1, characterized in that: The second side plate (13) is provided with a discharge port (14), and the discharge port (14) is used to connect the dispensing slurry recovery channel (40) and the dispensing slurry collection box (70).

4. A coating die head discharge recovery structure according to claim 3, characterized in that: A first guide arc plate (41) is provided in the dispensing slurry recovery channel (40), and the first guide arc plate (41) extends from the opening (11) to the discharge port (14).

5. A coating die head discharge recovery structure according to claim 4, characterized in that: The slope of the first guide arc plate (41) in the third direction (Z) gradually increases from a direction close to the opening (11) to a direction away from the opening (11).

6. A coating die head discharge recovery structure according to claim 1, characterized in that: It also includes a cover plate (50), the cover plate (50) being hinged to the receiving box (10) along the second direction (Y), and the cover plate (50) being used to seal the opening (11).

7. A coating die head discharge recovery structure according to claim 6, characterized in that: The cover plate (50) is hinged to the second side plate (13), and the notch (22) faces away from the hinge between the cover plate (50) and the second side plate (13).

8. A coating die head discharge recovery structure according to any one of claims 1 to 7, characterized in that: It also includes a first material receiving barrel (80), the main slurry collection box (60) is provided with a first discharge port (61), and the first discharge port (61) is connected to the first material receiving barrel (80) through a pipeline.

9. A coating die head discharge recovery structure according to claim 8, characterized in that: A second guide arc plate (62) extending along the second direction (Y) is provided in the main slurry collection box (60), the convex surface of the second guide arc plate (62) faces the main slurry recovery channel (30), the first discharge port (61) extends along the second direction (Y), and the first discharge port (61) is located on a side of the second guide arc plate (62) away from the main slurry recovery channel (30).

10. A coating die head discharge recovery structure according to any one of claims 1 to 7, characterized in that: It also includes a second material receiving barrel (90), and the dispensing slurry collection box (70) is provided with a second discharge port (71), and the second discharge port (71) is connected to the second material receiving barrel (90) through a pipeline.

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