A coating die head

Abstract

The utility model relates to the technical field of coating machines and coating machine accessories, and specifically to a coating die head, comprising: a die head body, with a feed port on one side and a coating lip on the other side; a first cavity is provided in the die head body; the horizontal cross-section of the first cavity is triangular, and a first groove and a second groove are recessed at the bottom of one end of the first cavity facing the feed port; the first groove and the second groove are connected to each other, and the connection between the first groove and the second groove is connected to the feed port; a triangular diversion area is formed in the first cavity on the side of the first groove and the second groove facing the coating lip; the first cavity is connected to the coating lip. The slurry in the existing coating die head has poor fluidity, resulting in uneven pressure in the cavity, which in turn leads to uneven coating thickness on the substrate, making it difficult to apply to slurries with high solid content.

Description

Technical Field

[0001] The utility model relates to the technical field of coating machines and coating machine accessories, in particular to a coating die head. Background Art

[0002] The working principle of slit extrusion coating is that the slurry enters the cavity of the coating die head from the feed port to the coating slit of the coating die head and then to the coating lip of the coating die head under a certain pressure and flow rate. The slurry is sprayed out from the coating lip and transferred to the substrate. The coating die head is generally composed of an upper die head, a lower die head and a gasket sandwiched between the upper and lower die heads. The thickness of the gasket determines the thickness of the coating.

[0003] In the existing coating die, after the high-solid content slurry flows into the cavity of the coating die from the feed port, the fluidity is poor, resulting in uneven pressure in the cavity, which in turn leads to uneven coating thickness on the substrate. Therefore, it is difficult to apply to slurries with higher solid content. Utility Model Content

[0004] The utility model provides a coating die head, which solves the problem that the slurry in the existing coating die head has poor fluidity, causes uneven pressure in the cavity, and further causes uneven coating thickness on the substrate, making it difficult to apply to slurry with a high solid content.

[0005] In view of this, the utility model provides a coating die head, comprising:

[0006] A die body is provided with a feed port on one side and a coating lip on the other side; a first cavity is provided in the die body; the horizontal cross-section of the first cavity is triangular, and a first groove and a second groove are recessed at the bottom of one end of the first cavity facing the feed port; the first groove and the second groove are connected to each other, and the connection between the first groove and the second groove is connected to the feed port; a triangular diversion area is formed in the first cavity on the side of the first groove and the second groove facing the coating lip; the first cavity is connected to the coating lip.

[0007] Optionally, the first channel and the second channel are symmetrically arranged along the length direction of the die body.

[0008] Optionally, the depths of the first channel and the second channel gradually decrease along the discharge direction.

[0009] Optionally, a second cavity is provided in the die body, and the second cavity is located on the side of the first cavity close to the coating lip; one side of the second cavity is connected to the first cavity, and the other side is connected to the coating lip; the second cavity is arranged in a straight line along the length direction of the die body.

[0010] Optionally, an adjustment strip is provided in the die body between the triangular diversion area and the second cavity, suitable for the slurry to flow from the triangular diversion area to the second cavity through the adjustment strip; the adjustment strip is arranged along the length direction of the die body, suitable for adjusting the lateral thickness of the coating lip discharge.

[0011] Optionally, the top height of the regulating strip gradually decreases from both ends to the middle.

[0012] Optionally, the top height of the regulating strip gradually increases from both ends to the middle.

[0013] Optionally, the die body is penetrated with a plurality of through holes along the length direction, which are suitable for being connected to an external heating device to allow a heating medium to pass therethrough for heating.

[0014] Optionally, it also includes:

[0015] A temperature detection component is arranged on the die body, and a detection end of the temperature detection component is penetrated in the first cavity and is suitable for detecting the temperature of the first cavity.

[0016] Optionally, the die body includes a first die, a second die and a gasket, the gasket is clamped between the first die and the second die to form a coating slit and a coating lip connected to the coating slit; the feed port is arranged on the second die; the second die is provided with a first groove on the side facing the first die, the first groove and the first die form the first cavity, and the first cavity is connected to the coating slit through the coating slit.

[0017] The technical solution of this utility model has the following advantages:

[0018] In the utility model, a first cavity with a triangular horizontal cross-section is provided, and a first groove and a second groove are provided in the first cavity, so that the first groove and the second groove form a preset angle, and both are inclined toward one side of the coating lip. When the slurry flows into the first cavity through the feed port, since the first groove and the second groove are inclined, it is more convenient for the slurry to flow along the discharge direction, and then the slurry flows from the connection between the first groove and the second groove to the first groove and the second groove respectively, and then flows out to the coating lip after passing through the triangular diversion area. The first groove and the second groove improve the fluidity of the slurry in the first cavity, improve the uniformity of the pressure of the slurry in the first cavity, and then improve the uniformity of the coating thickness. It is suitable for improving the fluidity of slurry with a higher solid content and has a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 This is a schematic structural diagram of the coating die head provided by the utility model at a first viewing angle;

[0021] Figure 2 for Figure 1 Sectional view at AA in the figure;

[0022] Figure 3 A schematic diagram of the structure of the second die head provided by the utility model at a first viewing angle;

[0023] Figure 4 A schematic diagram of the structure of the second die head provided by the utility model at a second viewing angle;

[0024] Figure 5 A schematic diagram of the structure of the adjustment strip for adjusting the anti-U weight provided by the utility model;

[0025] Figure 6 A schematic diagram of the structure of the adjustment strip for adjusting the U weight provided by the utility model;

[0026] Figure 7 This is a schematic structural diagram of the coating die head provided by the utility model at a third viewing angle.

[0027] Description of reference numerals:

[0028] 1. Die body; 101. First die; 102. Second die; 103. Gasket; 2. Feed inlet; 3. Coating lip; 4. First cavity; 5. First groove; 6. Second groove; 7. Triangular diversion area; 8. Second cavity; 9. Adjustment strip; 10. Through hole; 11. Temperature detection component; 12. Mounting groove. DETAILED DESCRIPTION

[0029] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] Example 1

[0034] See also Figures 1 to 7 The present embodiment provides a coating die, comprising: a die body 1, a feed port 2 being provided on one side, and a coating lip 3 being provided on the other side; a first cavity 4 being provided in the die body 1; a horizontal cross-section of the first cavity 4 is triangular, and a first groove 5 and a second groove 6 are recessed in the bottom of one end of the first cavity 4 facing the feed port 2; the first groove 5 and the second groove 6 are connected to each other, and a connection between the first groove 5 and the second groove 6 is connected to the feed port 2; a triangular diversion area 7 is formed in the first cavity 4 on the side of the first groove 5 and the second groove 6 facing the coating lip 3; the first cavity 4 is connected to the coating lip 3.

[0035] It should be noted that the top angle of the first cavity 4 faces the feed port 2 , the first groove 5 and the second groove 6 are arranged at a preset angle, and the opening formed by the first groove 5 and the second groove 6 faces the coating lip 3 .

[0036] In this embodiment, a first cavity 4 with a triangular horizontal cross-section is provided, and a first groove 5 and a second groove 6 are provided in the first cavity 4, so that the first groove 5 and the second groove 6 form a preset angle, and are both inclined toward one side of the coating lip 3. When the slurry flows into the first cavity 4 through the feed port 2, since the first groove 5 and the second groove 6 are inclined, it is more convenient for the slurry to flow along the discharge direction, and then the slurry flows from the connection between the first groove 5 and the second groove 6 to the first groove 5 and the second groove 6 respectively, and then flows out to the coating lip 3 after passing through the triangular diversion area 7. The first groove 5 and the second groove 6 improve the fluidity of the slurry in the first cavity 4, improve the uniformity of the pressure of the slurry in the first cavity 4, and then improve the uniformity of the coating thickness. It is suitable for improving the fluidity of slurry with a higher solid content and has a wider range of applications.

[0037] Example 2

[0038] As a further improvement to Example 1, Figure 3 and Figure 4 As shown, the first groove 5 and the second groove 6 are symmetrically arranged along the length direction of the die body 1.

[0039] In this embodiment, the first groove 5 and the second groove 6 are symmetrically arranged so that the flow velocity and flow rate of the slurry flowing into the first groove 5 and the second groove 6 remain consistent, and then flow evenly into the triangular diversion area 7 until the entire first cavity 4 is filled and then flows out of the coating lip 3, further improving the uniformity of the pressure in the first cavity 4 and the coating thickness.

[0040] Based on the above implementation, in a preferred implementation, Figure 2 and Figure 3 As shown, the depths of the first groove 5 and the second groove 6 gradually decrease along the discharge direction, that is, the depths of the first groove 5 and the second groove 6 gradually decrease from the feed inlet 2 toward the triangular diversion area 7.

[0041] In this embodiment, by setting the depths of the first groove 5 and the second groove 6 to gradually decrease along the discharge direction, a certain slope is formed between the first groove 5, the second groove 6 and the triangular diversion area 7, which facilitates the slurry to flow from the first groove 5 and the second groove 6 to the triangular diversion area 7, thereby improving the fluidity of the slurry in the first cavity 4.

[0042] Based on the above implementation, in a preferred implementation, Figures 2 to 4As shown, a second cavity 8 is provided in the die body 1, and the second cavity 8 is located on the side of the first cavity 4 close to the coating lip 3; one side of the second cavity 8 is connected to the first cavity 4, and the other side is connected to the coating lip 3; the second cavity 8 is arranged in a straight line along the length direction of the die body 1.

[0043] In this embodiment, by setting a second cavity 8 in the shape of a straight line, the slurry flows from the first cavity 4 into the second cavity 8, so that the slurry is evenly distributed in the second cavity 8, thereby achieving the effect of equalizing the pressure of the slurry. Then the slurry flows out of the second cavity 8 to the coating lip 3 for coating.

[0044] Specifically, Figure 2 As shown, the depth of the second cavity 8 gradually decreases along the discharge direction, which facilitates the slurry to flow out of the second cavity 8 and improves the fluidity of the slurry.

[0045] Based on the above implementation, in a preferred implementation, Figures 2 to 4 As shown, an adjusting strip 9 is provided in the die body 1 between the triangular diversion area 7 and the second cavity 8, which is suitable for the slurry to flow from the triangular diversion area 7 to the second cavity 8 through the adjusting strip 9; the adjusting strip 9 is arranged along the length direction of the die body 1, and is suitable for adjusting the transverse thickness of the discharge of the coating lip 3.

[0046] In this embodiment, by setting an adjustment pressure between the first cavity 4 and the second cavity 8, the slurry in the first cavity 4 first passes through the adjustment strip 9 when flowing out, and the flow passing through the adjustment strip 9 is blocked by the adjustment strip 9, and then the lateral thickness of the discharge material is adjusted in the length direction of the strip, thereby realizing the adjustment of the lateral uniformity of the coating thickness.

[0047] Specifically, the first cavity 4 and the second cavity 8 are connected through the third cavity, and the adjusting pressure strip 9 is arranged at the bottom of the third cavity.

[0048] Specifically, Figure 3 and Figure 4 As shown, a mounting groove 12 is provided at the bottom of the third cavity corresponding to the adjusting pressure strip 9 , the adjusting pressure strip 9 is embedded in the mounting groove 12 , and a screw for connecting the adjusting pressure strip 9 is penetrated at the bottom of the mounting groove 12 .

[0049] Based on the above implementation, in a preferred implementation, Figure 5 As shown, the top height of the adjusting pressure strip 9 gradually decreases from both ends to the middle, that is, the top of the adjusting pressure strip 9 is arranged in a U shape.

[0050] Reverse U weight refers to the lateral comparison of the slurry coating coated by the coating die head. The coating thickness in the central area close to the cavity feed port 2 is small, and the coating thickness on both sides is large.

[0051] In this embodiment, by setting a structural form in which the top height of the adjusting strip 9 gradually decreases from the two ends to the middle, it can be applied to the scenario of anti-U-weight adjustment, that is, by adjusting the higher ends of the strip 9 to block the flow of slurry in the two side areas of the first cavity 4, so that its lateral thickness is uniform, thereby achieving lateral uniformity of coating thickness, and the curvature of the top of the adjusting strip 9 can be set according to the characteristics of different slurries.

[0052] As a convertible implementation method, it can also be, for example Figure 6 As shown, the top height of the adjusting strip 9 gradually increases from both ends to the middle, that is, the top of the adjusting strip 9 is set in an inverted U shape. U-weight refers to the lateral comparison of the slurry coating coated by the coating die head. The coating thickness is large in the central area close to the cavity feed port 2, and the coating thickness is small on both sides. By setting a structural form in which the top height of the adjusting strip 9 gradually increases from both ends to the middle, it can be applied to the scenario of U-weight adjustment, that is, by adjusting the higher middle position of the strip 9 to block the flow of the slurry in the middle area of ​​the first cavity 4, so that its lateral thickness is uniform, thereby achieving lateral uniformity of the coating thickness, and the curvature of the top of the adjusting strip 9 can be set according to the characteristics of different slurries.

[0053] Based on the above implementation, in a preferred implementation, Figure 1 , Figure 2 and Figure 7 As shown, the die body 1 is penetrated with a plurality of through holes 10 along the length direction, which are suitable for being connected to an external heating device to allow a heating medium to pass therein for heating.

[0054] In this embodiment, a plurality of through holes 10 are provided and connected to an external heating device to allow a heating medium (such as a heating liquid or a heating gas) to be introduced for circulation heating, thereby improving the fluidity of the slurry by heating. Specifically, the plurality of through holes 10 can be connected to the external heating device in series or in parallel, and the specific selection can be made according to actual conditions.

[0055] Based on the above implementation, in a preferred implementation, Figure 2 As shown, the coating die head further includes: a temperature detection component 11 , which is arranged on the die head body 1 , and a detection end of the temperature detection component 11 is penetrated into the first cavity 4 , suitable for detecting the temperature of the first cavity 4 .

[0056] In this embodiment, the temperature inside the first cavity 4 can be detected by setting a temperature detection component 11. When the die body 1 is heated by an external heating device and the through hole 10, the temperature of the first cavity 4 can be detected by the temperature detection component 11. When the preset temperature is reached, the preset temperature is the optimum temperature for improving the fluidity of the slurry. Then, the slurry can be introduced through the feed port 2 to improve the fluidity of the slurry at the optimum temperature.

[0057] Specifically, the temperature detection member 11 includes at least one temperature sensor.

[0058] Based on the above implementation, in a preferred implementation, Figure 1 , Figure 2 and Figure 7 As shown, the die body 1 includes a first die 101, a second die 102 and a gasket 103, the gasket 103 is clamped between the first die 101 and the second die 102 to enclose a coating slit and the coating lip 3 connected to the coating slit; the feed port 2 is arranged on the second die 102; the second die 102 is provided with a first groove on the side facing the first die 101, the first groove and the first die 101 are enclosed to form the first cavity 4, and the first cavity 4 is connected to the coating slit 3.

[0059] In this embodiment, the die body 1 is a split structure consisting of a first die 101 and a second die 102 , which is convenient for disassembly to clean the first cavity 4 and the second cavity 8 , and is also convenient for adjusting the replacement of the pressure strip 9 .

[0060] Specifically, a second groove is provided on a side of the second die head 102 facing the first die head 101 , and the second groove and the first die head 101 are enclosed to form the second cavity 8 , and the second cavity 8 is connected with the coating lip 3 through the coating slit.

[0061] The specific working principle of the coating die provided in this embodiment is as follows: before the high-solid content slurry enters the first cavity 4, the die body 1 is heated through the through hole 10 by an external heating device. When the temperature detecting element 11 detects that the temperature in the first cavity 4 reaches the preset temperature, the slurry is then introduced through the feed port 2. Since the first groove 5 and the second groove 6 are arranged obliquely, it is more convenient for the slurry to flow along the discharge direction. Then, the slurry flows from the connection of the first groove 5 and the second groove 6 to the first groove 5 and the second groove 6 respectively, and then flows to the regulating layer 9 after passing through the triangular diversion area 7. The curvature of the regulating layer 9 can be specifically configured according to the characteristics of different slurries. The slurry passes through The pressure strip 9 is adjusted to adjust the lateral uniformity of its flow rate and then flows to the second cavity 8. After being pressurized by the second cavity 8, it flows out to the coating lip 3 through the coating slit. The coating die head provided in this embodiment is in a structural form with a preset angle through the first groove 5 and the second groove 6, and is heated by the through hole 10 to improve the fluidity of the slurry in the first cavity 4, thereby improving the uniformity of the pressure of the slurry in the first cavity 4 and the uniformity of the coating thickness. In addition, the lateral uniformity of the coating thickness is further increased by adjusting the pressure strip 9, and the uniformity of the coating pressure is improved through the second cavity 8. It is suitable for improving the fluidity of slurries with higher solid content and has a wider range of applications. It solves the problem that the slurry in the existing coating die head has poor fluidity, resulting in uneven pressure in the cavity, and then uneven coating thickness on the substrate, which is difficult to apply to slurries with higher solid content.

[0062] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A coating die head, characterized in that: include: A die body (1) is provided with a feed port (2) on one side and a coating lip (3) on the other side; a first cavity (4) is provided in the die body (1); the horizontal cross-section of the first cavity (4) is triangular, and a first groove (5) and a second groove (6) are recessed at the bottom of one end of the first cavity (4) facing the feed port (2); the first groove (5) and the second groove (6) are connected to each other, and the connection between the first groove (5) and the second groove (6) is connected to the feed port (2); a triangular diversion area (7) is formed in the first cavity (4) on the side of the first groove (5) and the second groove (6) facing the coating lip (3); the first cavity (4) is connected to the coating lip (3).

2. The coating die head according to claim 1, characterized in that: The first groove (5) and the second groove (6) are symmetrically arranged along the length direction of the die body (1).

3. The coating die head according to claim 1, characterized in that: The depths of the first channel (5) and the second channel (6) gradually decrease along the discharge direction.

4. The coating die head according to claim 1, characterized in that: A second cavity (8) is provided in the die body (1), and the second cavity (8) is located on a side of the first cavity (4) close to the coating lip (3); one side of the second cavity (8) is connected to the first cavity (4), and the other side is connected to the coating lip (3); the second cavity (8) is arranged in a straight line along the length direction of the die body (1).

5. The coating die head according to claim 4, characterized in that: An adjusting strip (9) is provided in the die body (1) between the triangular diversion area (7) and the second cavity (8), which is suitable for the slurry to flow from the triangular diversion area (7) to the second cavity (8) through the adjusting strip (9); the adjusting strip (9) is arranged along the length direction of the die body (1), and is suitable for adjusting the transverse thickness of the material discharged from the coating lip (3).

6. The coating die head according to claim 5, characterized in that: The top height of the regulating pressure strip (9) gradually decreases from both ends to the middle.

7. The coating die head according to claim 5, characterized in that: The top height of the regulating pressure strip (9) gradually increases from both ends to the middle.

8. The coating die head according to claim 1, characterized in that: The die body (1) is provided with a plurality of through holes (10) along the length direction, which are suitable for being connected to an external heating device so as to allow a heating medium to pass through for heating.

9. The coating die head according to claim 8, characterized in that: Also includes: A temperature detection component (11) is arranged on the die body (1), and a detection end of the temperature detection component (11) is inserted into the first cavity (4), suitable for detecting the temperature of the first cavity (4).

10. The coating die head according to any one of claims 1 to 9, characterized in that: The die body (1) comprises a first die (101), a second die (102) and a gasket (103); the gasket (103) is clamped between the first die (101) and the second die (102) to enclose a coating slit and a coating lip (3) connected to the coating slit; the feed port (2) is arranged on the second die (102); a first groove is arranged on a side of the second die (102) facing the first die (101); the first groove and the first die (101) enclose the first cavity (4), and the first cavity (4) is connected to the coating lip (3) through the coating slit.

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