Flat plate coating die head

Abstract

The utility model relates to the technical field of coating, in particular to a flat plate coating die head which comprises a die head body, and a coating lip for discharging is arranged on one side of the die head body along the width direction of the die head body; a cavity, a first runner cavity and a second runner cavity are formed in the die head body; the cavities are formed in the side part of the second runner cavity at intervals in the thickness direction of the die head body, the top ends of the cavities are communicated with the top end of the second runner cavity through the first runner cavity, and the discharging end of the second runner cavity is communicated with the coating lip; a through hole used for feeding is formed in the die head body and communicates with the bottom end of the cavity. The problems that in the process from rising to falling of a die head body of an existing flat plate coating die head, due to the gravity action of slurry in a feeding cavity and a coating slit, the slurry at a coating lip is prone to dripping, external air easily enters the die head body from the coating lip after dripping, the coating start stagnation time is prolonged during coating again, and the coating effect is poor are solved. And the coating efficiency is influenced.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of coating and concretely relates to a flat plate coating die head. BACKGROUND

[0002] The flat plate coating die head is a kind of high-precision equipment that uniformly coats slurry on substrate and forms a uniform thin film coating, and high-quality coating effect is realized by precisely controlling coating process.

[0003] The existing flat plate coating die head generally includes die head body, the die head body is equipped with feeding cavity, the die head body is equipped with coating lip for discharging coating, feeding cavity is communicated with coating lip by coating slit, when coating, coating lip is usually downward to substrate, after the current substrate is coated, the die head body needs to be raised first and then lowered, then the next substrate is coated, however, in the process of rising and lowering, under the action of slurry gravity in feeding cavity and coating slit, slurry in coating lip is prone to dripping, especially when slurry viscosity is low and coating lip gap is large, dripping phenomenon is more obvious, after dripping, external air is easy to enter the die head body from coating lip, when coating again, coating stagnation time is prolonged, which affects coating efficiency. SUMMARY

[0004] The utility model provides a kind of flat plate coating die head, solve the die head body of the existing flat plate coating die head in the process of rising and lowering, under the action of slurry gravity in feeding cavity and coating slit, slurry in coating lip is prone to dripping, after dripping, external air is easy to enter the die head body from coating lip, when coating again, coating stagnation time is prolonged, which affects the technical problem of coating efficiency.

[0005] Therefore, the utility model provides a kind of flat plate coating die head, including die head body, the die head body is equipped with coating lip for discharging on the side along its width direction;

[0006] The cavity, first flow channel cavity and second flow channel cavity are arranged in the die head body;The cavity is arranged on the side of the second flow channel cavity along the thickness direction of the die head body, and the top end of the cavity is communicated with the top end of the second flow channel cavity through the first flow channel cavity, and the discharging end of the second flow channel cavity is communicated with the coating lip;

[0007] The die head body is equipped with through hole for feeding, and the through hole is communicated with the bottom end of the cavity.

[0008] Optionally, the flow area of the first flow channel cavity is greater than or equal to the flow area of the second flow channel cavity.

[0009] Optionally, the first flow channel cavity and the second flow channel cavity are vertically arranged.

[0010] And / or, the distance between the two side walls of the cavity in the length direction of the die body gradually increases from the bottom end to the top end.

[0011] Optionally, the die body comprises a first die and a second die; the first die is provided with a slot and is formed with a first side wall and a second side wall; the second die is adapted to be arranged in the slot and forms the coating lip with the first die;

[0012] The cavity is arranged on the second die, the second die is provided with a first flow channel groove on one side facing the first side wall, the second die is provided with a second flow channel groove on one side facing the second side wall, and the first flow channel groove and the second flow channel groove are in communication; the first flow channel groove and the first side wall form the first flow channel cavity; the second flow channel groove and the second side wall form the second flow channel cavity.

[0013] Optionally, the first die and the second die are connected by a fastening screw.

[0014] Optionally, a plurality of first screw holes for the fastening screw to pass through are provided on the first die corresponding to the first side wall, and a plurality of the first screw holes are arranged side by side along the length direction of the first die, and a second screw hole is provided on the second die corresponding to the first screw hole.

[0015] Optionally, the second flow channel cavity is arranged at a preset included angle with the cavity.

[0016] Optionally, the distance from the bottom end to the top end in the cavity is a first distance, when the first distance is less than the distance from the first flow channel cavity to the second screw hole, the included angle between the second flow channel cavity and the cavity is 0°-90°.

[0017] Optionally, the distance from the bottom end to the top end in the cavity is a first distance, when the first distance is greater than or equal to the distance from the first flow channel cavity to the second screw hole, the included angle between the second flow channel cavity and the cavity is 0°-45°.

[0018] Optionally, a plurality of third screw holes for the fastening screw to pass through are provided on the second die corresponding to the second side wall, and a fourth screw hole is provided on the first die corresponding to the third screw hole.

[0019] The technical scheme of the utility model has the following advantages:

[0020] 1. By arranging the cavity and the second flow channel cavity in the horizontal direction and connecting them through the first flow channel cavity, the gravity of the slurry in the cavity does not act on the slurry in the second flow channel cavity, eliminating the squeezing effect of the gravity of the slurry in the cavity on the slurry at the coating lip. In the process of rising and falling of the die body, the risk of dripping at the coating lip is greatly reduced, thereby avoiding the risk of external air entering the die body due to dripping, shortening the coating stagnation time, improving the coating efficiency, and avoiding air entering the first flow channel cavity, the second flow channel cavity and the space where the cavity is located to mix with the slurry to form bubbles, thereby improving the coating quality.

[0021] 2. The through hole is connected to the bottom of the cavity, so that the slurry flows into the cavity from bottom to top and slowly rises to squeeze the air out, thereby improving the overall emptying effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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 any creative work.

[0023] Figure 1 This is a schematic structural diagram of the flat coating die head provided by the utility model at a first viewing angle;

[0024] Figure 2 This is a schematic structural diagram of the flat coating die head provided by the utility model at a second viewing angle;

[0025] Figure 3 for Figure 2 AA section view in;

[0026] Figure 4 for Figure 3 Enlarged view of point C in the figure;

[0027] Figure 5 This is a schematic structural diagram of the second die head provided by the utility model at a third viewing angle;

[0028] Figure 6 This is a schematic structural diagram of the second die head provided by the utility model at a second viewing angle;

[0029] Figure 7 for Figure 6 BB cross-sectional view in;

[0030] Figure 8 This is a schematic structural diagram of the first die head provided by the utility model at a first viewing angle.

[0031] Reference Signs List:

[0032] 1, die body; 101, first die; 102, second die; 2, coating lip; 3, cavity; 4, first runner cavity; 5, second runner cavity; 6, through hole; 7, first side wall; 8, second side wall; 9, first runner groove; 10, second runner groove; 11, first screw hole; 12, second screw hole; 13, third screw hole; 14, fourth screw hole. DETAILED DESCRIPTION

[0033] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0034] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as there is no conflict.

[0037] Example 1

[0038] Please refer to Figures 1 to 8The present embodiment provides a flat coating die, comprising a die body 1, on which a coating lip 2 for discharging is provided on one side along the width direction of the die body 1; a cavity 3, a first flow channel cavity 4 and a second flow channel cavity 5 are provided in the die body 1; the cavity 3 is arranged at intervals on the side of the second flow channel cavity 5 along the thickness direction of the die body 1, and the top of the cavity 3 is connected with the top of the second flow channel cavity 5 through the first flow channel cavity 4, and the discharge end of the second flow channel cavity 5 is connected with the coating lip 2; a through hole 6 for feeding is provided on the die body 1, and the through hole 6 is connected with the bottom end of the cavity 3.

[0039] It should be noted that when the coating lip 2 is arranged downward, the thickness direction of the die body is the horizontal direction.

[0040] In this embodiment, when coating is required, the coating lip 2 is set downward for coating. At this time, the cavity 3 is spaced apart from the second flow channel cavity 5 in the horizontal direction. The slurry enters the bottom end of the cavity 3 through the through hole 6, and slowly squeezes the air from the bottom end of the cavity 3 to rise. After filling the cavity 3, the slurry transitions from the second flow channel cavity 5 to the first flow channel cavity 4, and is discharged from the first flow channel cavity 4 to the coating lip 2 to coat the substrate; since the cavity 3 is spaced apart from the second flow channel cavity 5 in the horizontal direction, the gravity of the slurry in the cavity 3 does not act on the slurry in the second flow channel cavity 5, that is, the squeezing effect of the gravity of the slurry in the cavity 3 on the slurry at the coating lip 2 is eliminated, and the die body 1 is greatly reduced during the rise and fall process. The risk of dripping at the coating lip 2 is avoided, thereby avoiding the risk of external air entering the die body 1 due to dripping, shortening the coating stagnation time, improving the coating efficiency, and avoiding air entering the first flow channel cavity 4, the second flow channel cavity 5 and the space where the cavity 3 is located and mixing with the slurry to form bubbles, thereby improving the coating quality; in addition, the through hole 6 is connected to the bottom of the cavity 3. When feeding, as the slurry liquid level in the cavity 3 slowly rises, the air in the cavity 3 is discharged through the first flow channel cavity 4 and the second flow channel cavity 5. After the slurry fills the cavity 3, it flows into the first flow channel cavity 4 and the second flow channel cavity 5. The smaller gaps in the first flow channel cavity 4 and the second flow channel cavity 5 can easily be squeezed by the slurry to discharge the air, thereby improving the overall emptying effect.

[0041] Example 2

[0042] As a further improvement to Example 1, Figure 4 As shown, the flow cross-sectional area of ​​the first flow channel cavity 4 is greater than or equal to the flow cross-sectional area of ​​the second flow channel cavity 5 .

[0043] In the embodiment, the flow passage cross-sectional area of the first flow passage cavity 4 is greater than or equal to the flow passage cross-sectional area of the second flow passage cavity 5, so that the slurry is slowly transferred from the cavity 3 to the second flow passage cavity 5 and fills the entire second flow passage cavity 5, and the emptying is facilitated. If the flow passage cross-sectional area of the first flow passage cavity 4 is less than the flow passage cross-sectional area of the second flow passage cavity 5, the slurry flow is not facilitated and the cavity pressure is increased, which affects the coating quality.

[0044] On the basis of the above-mentioned embodiments, in a preferred embodiment, as shown in Figures 3 to 5 and Figure 7 , the first flow passage cavity 4 and the second flow passage cavity 5 are arranged vertically.

[0045] In the embodiment, the first flow passage cavity 4 and the second flow passage cavity 5 are arranged vertically, so that the slurry in the cavity 3 is smoothly transferred to the second flow passage cavity 5, and at this time the top end of the cavity 3 and the top end of the second flow passage cavity 5 are at the same level, further avoiding the gravitational effect of the slurry in the cavity 3 and the second flow passage cavity 5.

[0046] On the basis of the above-mentioned embodiments, in a preferred embodiment, as shown in Figure 6 , the distance between the two side walls of the cavity 3 in the length direction of the die body 1 gradually increases from the bottom end to the top end.

[0047] In the embodiment, the distance between the two side walls of the cavity 3 in the length direction of the die body 1 gradually increases from the bottom end to the top end, that is, it is arranged like an inverted triangle, so that when the slurry flows into the cavity 3, the cavity pressure is evenly distributed, and the slurry uniformly fills the entire cavity 3.

[0048] Specifically, the communication between the through hole 6 and the cavity 3 is located at the middle position in the length direction of the cavity 3, so as to uniformly flow into the cavity 3.

[0049] On the basis of the above-mentioned embodiments, in a preferred embodiment, as shown in Figures 1 to 3 and Figure 8 , the die body 1 comprises a first die 101 and a second die 102; the first die 101 is provided with a slot and is formed with a first side wall 7 and a second side wall 8; the second die 102 is adaptively arranged in the slot and forms a coating lip 2 together with the first die 101; the cavity 3 is arranged on the second die 102, and the second die 102 is provided with a first flow passage groove 9 communicating with the cavity 3 on the side facing the first side wall 7, and is provided with a second flow passage groove 10 on the side facing the second side wall 8, and the first flow passage groove 9 and the second flow passage groove 10 communicate; the first flow passage groove 9 and the first side wall 7 form a first flow passage cavity 4; the second flow passage groove 10 and the second side wall 8 form a second flow passage cavity 5.

[0050] It should be noted that the first die 101 and the second die 102 are detachably connected.

[0051] In the embodiment, the die body 1 adopts a split structure composed of the first die 101 and the second die 102, which facilitates disassembly and installation and cleaning and maintenance of the first flow channel cavity 4 and the second flow channel cavity 5.

[0052] Specifically, the depth of the first flow channel groove 9 is greater than or equal to the depth of the second flow channel groove 10, so that the flow area of the first flow channel cavity 4 formed is greater than or equal to the flow area of the second flow channel cavity 5.

[0053] On the basis of the above-mentioned embodiment, in a preferred embodiment, as shown in Figure 1 and Figure 2 The first die 101 and the second die 102 are connected by fastening screws.

[0054] In the embodiment, the first die 101 and the second die 102 are connected by fastening screws, which facilitates installation and disassembly.

[0055] On the basis of the above-mentioned embodiment, in a preferred embodiment, as shown in Figure 3 The first die 101 is provided with a plurality of first screw holes 11 for the fastening screws to pass through, and the second die 102 is provided with second screw holes 12 corresponding to the first screw holes 11.

[0056] In the embodiment, the first die 101 is provided with the first screw holes 11 and the second die 102 is provided with the second screw holes 12, which are fixed by fastening screws, facilitating installation and disassembly, and making the first side wall 7 closely fit the second die 102, improving the sealing performance and preventing slurry leakage.

[0057] On the basis of the above-mentioned embodiment, in a preferred embodiment, as shown in Figure 3 and Figure 7 The second flow channel cavity 5 is arranged at a preset angle with the cavity 3.

[0058] It should be noted that when the coating lip 2 is arranged downward, the second flow channel cavity 5 is arranged in the vertical direction.

[0059] In the embodiment, the second flow channel cavity 5 is arranged at a preset angle with the cavity 3, and the angle between the second flow channel cavity 5 and the cavity 3 is α. When the gravity of the slurry in the cavity 3 eliminates the extrusion of the slurry at the coating lip 2, the specific angle of α can be adjusted according to the position of the second screw hole 12, so that the cavity 3 avoids the space where the second screw hole 12 is arranged, avoiding the interference between the cavity 3 and the second screw hole 12.

[0060] On the basis of the above-mentioned embodiments, in a preferred embodiment, as shown in Figure 3 and Figure 7 When the first distance is less than the distance from the first runner cavity 4 to the second screw hole 12, the included angle between the second runner cavity 5 and the cavity 3 is 0°-90°.

[0061] In this embodiment, when the first distance is less than the distance from the first runner cavity 4 to the second screw hole 12, the included angle between the second runner cavity 5 and the cavity 3 is 0°-90°, i.e. α is 0°-90°, within this range, both the gravitational force of the slurry in the cavity 3 on the slurry at the coating lip 2 is eliminated and the cavity 3 does not interfere with the second screw hole 12.

[0062] On the basis of the above-mentioned embodiments, in a preferred embodiment, as shown in Figure 3 , Figure 7 When the first distance is greater than or equal to the distance from the first runner cavity 4 to the second screw hole 12, the included angle between the second runner cavity 5 and the cavity 3 is 0°-45°.

[0063] In this embodiment, when the first distance is greater than or equal to the distance from the first runner cavity 4 to the second screw hole 12, the included angle between the second runner cavity 5 and the cavity 3 is 0°-45°, i.e. α is 0°-45°, within this range, both the gravitational force of the slurry in the cavity 3 on the slurry at the coating lip 2 is eliminated and the cavity 3 does not interfere with the second screw hole 12.

[0064] On the basis of the above-mentioned embodiments, in a preferred embodiment, as shown in Figure 1 , Figure 6 and Figure 8 A plurality of third screw holes 13 for fastening screws to pass through are provided on the second die 102 corresponding to the second side wall 8, and a fourth screw hole 14 is provided on the first die 101 corresponding to the third screw hole 13.

[0065] In this embodiment, the third screw hole 13 and the fourth screw hole 14 are provided at positions corresponding to the second side wall 8, and the second die 102 is fixed by fastening screws when placed in the slot, further improving the fixing effect, and at the same time, the second die 102 is tightly attached to the second side wall 8, improving the sealing performance and preventing slurry leakage.

[0066] The specific working principle of the flat plate coating die provided by the embodiment is as follows: when coating, the coating lip 2 is arranged downward, at this time, the cavity 3 is arranged in a preset angle interval with the second flow channel cavity 5 in the horizontal direction, the slurry enters the bottom end of the cavity 3 through the through hole 6, and is slowly extruded to rise by the bottom end of the cavity 3, after filling the cavity 3, the slurry is transferred to the first flow channel cavity 4 from the second flow channel cavity 5, and is discharged to the coating lip 2 from the first flow channel cavity 4 to coat the substrate; since the cavity 3 is arranged in a preset angle interval with the second flow channel cavity 5 in the horizontal direction, the extrusion effect of the slurry in the cavity 3 on the slurry at the coating lip 2 is eliminated, during the lifting and lowering of the die body 1, the risk of dripping of the slurry at the coating lip 2 is greatly reduced, thereby avoiding the risk of external air entering the die body 1 due to dripping, shortening the start-up stagnation time, improving the coating efficiency, and also avoiding air entering the space where the first flow channel cavity 4, the second flow channel cavity 5 and the cavity 3 are located to mix with the slurry to form bubbles, thereby improving the coating quality; in addition, the through hole 6 is connected to the middle position of the bottom of the cavity 3, and the cavity 3 is arranged in an inverted triangular shape, so that the slurry flows uniformly into the cavity 3 from bottom to top and slowly rises, thereby improving the overall emptying effect and stability during feeding, and solving the technical problem that the die body 1 of the existing flat plate coating die is affected by the gravity of the slurry in the feeding cavity and the coating gap during lifting and lowering, the slurry at the coating lip 2 is prone to dripping, after dripping, external air is easy to enter the die body 1 from the coating lip 2, and the start-up stagnation time is prolonged during re-coating, thereby affecting the coating efficiency.

[0067] Obviously, the above embodiments are only examples for clearly illustrating the present application, and are not intended to limit the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments cannot be exhausted, and the obvious changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A flat coating die head, characterized in that, The die body (1) comprises a coating lip (2) for discharging materials, which is provided on one side of the die body (1) along its width direction; The die body (1) is provided with a cavity (3), a first flow channel cavity (4) and a second flow channel cavity (5); the cavity (3) is arranged at intervals on the side of the second flow channel cavity (5) along the thickness direction of the die body (1), and the top end of the cavity (3) is connected to the top end of the second flow channel cavity (5) through the first flow channel cavity (4), and the discharge end of the second flow channel cavity (5) is connected to the coating lip (2); The die body (1) is provided with a through hole (6) for feeding, and the through hole (6) is communicated with the bottom end of the cavity (3).

2. The flat coating die head according to claim 1, characterized in that The flow cross-sectional area of ​​the first flow channel cavity (4) is greater than or equal to the flow cross-sectional area of ​​the second flow channel cavity (5).

3. The flat coating die head according to claim 1, characterized in that The first flow channel cavity (4) and the second flow channel cavity (5) are arranged vertically; And / or, the distance between the two side walls of the cavity (3) in the length direction of the die body (1) gradually increases from the bottom end to the top end.

4. The flat coating die head according to any one of claims 1 to 3, characterized in that: The die body (1) comprises a first die (101) and a second die (102); the first die (101) is provided with a groove and is formed with a first side wall (7) and a second side wall (8); the second die (102) is adapted to be arranged in the groove and encloses the first die (101) to form the coating lip (2); The cavity (3) is arranged on the second die head (102); a first flow channel (9) communicating with the cavity (3) is provided on the side of the second die head (102) facing the first side wall (7); a second flow channel (10) is provided on the side of the second die head (102) facing the second side wall (8); the first flow channel (9) is communicated with the second flow channel (10); the first flow channel (9) and the first side wall (7) enclose the first flow channel cavity (4); the second flow channel (10) and the second side wall (8) enclose the second flow channel cavity (5).

5. The flat coating die head according to claim 4, characterized in that, The first die head (101) and the second die head (102) are connected by fastening screws.

6. The flat coating die head according to claim 5, characterized in that: The first die head (101) is provided with a plurality of first screw holes (11) corresponding to the first side wall (7) for the fastening screws to pass through, and the plurality of first screw holes (11) are arranged side by side along the length direction of the first die head (101), and the second die head (102) is provided with second screw holes (12) corresponding to the first screw holes (11).

7. The flat coating die head according to claim 6, characterized in that: The second flow channel cavity (5) and the cavity (3) are arranged at a preset angle.

8. The flat coating die head according to claim 7, characterized in that: The distance from the bottom end to the top end of the cavity (3) is a first distance. When the first distance is smaller than the distance from the first flow channel cavity (4) to the second screw hole (12), the angle between the second flow channel cavity (5) and the cavity (3) is 0°-90°.

9. The flat coating die head according to claim 7, characterized in that: The distance from the bottom end to the top end of the cavity (3) is a first distance. When the first distance is greater than or equal to the distance from the first flow channel cavity (4) to the second screw hole (12), the angle between the second flow channel cavity (5) and the cavity (3) is 0°-45°.

10. The flat coating die head according to claim 5, characterized in that: The second die head (102) is provided with a plurality of third screw holes (13) corresponding to the second side wall (8) for the fastening screws to pass through, and the first die head (101) is provided with a fourth screw hole (14) corresponding to the third screw hole (13).

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