Coating head

Abstract

The utility model discloses a coating head. The coating head comprises a first die head and a second die head, wherein the first die head comprises a matching surface and an accommodating cavity; the matching surface is used for being matched with another die head; the accommodating cavity is formed by sinking from the matching surface, the accommodating cavity is used for accommodating coating slurry, the accommodating cavity comprises a first end and a second end which are opposite to each other, and the second end of the accommodating cavity is one end close to a liquid outlet position of the coating head; a recess facing the second end is formed at the first end of the accommodating cavity. The coating head disclosed by the utility model is used for reducing the waste of coating slurry and improving the material utilization rate so as to reduce the production cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to coating equipment technical field especially relates to a coating head. BACKGROUND

[0002] The coating head is commonly used to form the required liquid film on the substrate by the way of slit coating. The coating head generally has a material containing cavity for containing coating slurry and an outlet slit communicating with the material containing cavity. The coating head includes a pair of dies, one of which is provided with a containing cavity, and the containing cavity of the die serves as the main component of the material containing cavity of the coating head. During coating operation, the coating slurry is first supplied to the material containing cavity, and when the material containing cavity is filled with the coating slurry, the coating slurry can flow out uniformly and stably from the outlet slit, thereby forming a uniform liquid film.

[0003] The existing coating head has a large containing cavity, resulting in a large material containing cavity of the coating head. In the coating process, in order to ensure the uniformity of the slurry flowing out of the outlet slit of the coating head, the material containing cavity needs to be filled with coating slurry at all times, and after the coating is completed, a large amount of coating slurry remains in the material containing cavity, causing waste of coating slurry, low material utilization rate, and increased production cost. SUMMARY

[0004] The purpose of the utility model is to provide a coating head for reducing waste of coating slurry, improving material utilization rate, and reducing production cost.

[0005] The purpose of the utility model is achieved by the following technical solutions.

[0006] A coating head, comprising a first die and a second die; wherein the first die comprises:

[0007] a mating surface for mating with the second die;

[0008] a containing cavity recessed from the mating surface, and the containing cavity is used for containing coating slurry, the containing cavity comprises opposite first and second ends, and the second end of the containing cavity is an end adjacent to the liquid outlet position of the coating head; the first end of the containing cavity is recessed towards the second end to form a "v" shaped recess.

[0009] Preferably, the middle part of the first end of the containing cavity is recessed towards the second end to form a "v" shaped recess.

[0010] Preferably, the first end of the containing cavity comprises a first top wall and a second top wall forming a "v" shaped recess, and the included angles of the first top wall and the second top wall with the horizontal plane are 1-10° respectively.

[0011] Preferably, a first corner space formed between the first top wall and the adjacent side wall of the accommodating cavity is located at the topmost end of the accommodating cavity, and the coating head is provided with a first exhaust hole in communication with the first corner space.

[0012] Preferably, a second corner space formed between the second top wall and the adjacent side wall of the accommodating cavity is located at the topmost end of the accommodating cavity, and the coating head is provided with a second exhaust hole in communication with the second corner space.

[0013] Preferably, the first exhaust hole and the second exhaust hole respectively extend from the accommodating cavity to the coating head in a horizontal direction.

[0014] Preferably, the recess depth of the accommodating cavity is 3-5 mm, and the height of the accommodating cavity is 5-6 mm.

[0015] Preferably, the application further comprises a feeding hole, which is connected to the middle part of the accommodating cavity and extends horizontally.

[0016] Preferably, the diameter of the feeding hole is 0.5-3 mm.

[0017] Preferably, the volume of the accommodating cavity is 10-15 ml.

[0018] Preferably, the inner wall of the second die face towards the mating surface is a plane, and the inner wall and the wall forming the accommodating cavity form a material accommodating cavity of the coating head.

[0019] Alternatively, the second die is provided with a concave cavity in the structure of the accommodating cavity, and the concave cavity and the accommodating cavity are used together to form a material accommodating cavity of the coating head.

[0020] Compared with the prior art, the application has at least the following beneficial effects:

[0021] The application forms a recess towards the second end at the first end of the accommodating cavity, which effectively reduces the volume of the accommodating cavity and the amount of coating paste required to fill the accommodating cavity, so that the amount of coating paste remaining in the accommodating cavity after coating can be effectively reduced, thereby reducing the waste of coating paste and improving the utilization rate of materials to reduce production costs. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a partial structure schematic view of a coating head in the prior art;

[0023] Figure 2 is a partial structure sectional view of a coating head in the prior art;

[0024] Figure 3 is a structure schematic view of a first die according to an embodiment of the application.

[0025] Figure 4 is a sectional view of the first die of the embodiment of the utility model;

[0026] Figure 5 is a sectional view of the first die of the embodiment of the utility model under another cutting plane;

[0027] Figure 6 is a perspective view of the first die of the embodiment of the utility model;

[0028] Figure 7 is a structural schematic view of the coating head of the embodiment of the utility model;

[0029] Figure 8 is a structural schematic view of the coating head of another embodiment of the utility model.

[0030] In the drawing: 100, first die; 1, 1', mating surface; 2, 2', accommodating cavity; 21, first end; 22, second end; 23, first top wall; 24, second top wall; 25, first corner space; 26, second corner space; 3, 3', feed hole; 4, 4', first exhaust hole; 5, second exhaust hole; 200, second die; 201, inner wall; 202, recess; 300, gasket; 400, slit outlet. DETAILED DESCRIPTION

[0031] Example implementations will now be described more fully with reference to the accompanying drawings. Example implementations may, however, be implemented in many different forms and should not be construed as limited to the implementations set forth herein; rather, these implementations are provided so that this disclosure will be thorough and complete, and fully convey the inventive aspects of example implementations to those skilled in the art. Like reference numerals refer to like elements throughout the figures, and descriptions of the same elements will not be repeated.

[0032] The words expressing position and direction described in the utility model are all explained by taking the drawing as an example, but changes can also be made according to needs, and the changes made are all included in the protection scope of the utility model.

[0033] As Figures 3 to 6 shown, the utility model provides a kind of coating head, including first die 100 and second die 200, it can also include gasket 300.First die 100 includes mating surface 1 and the accommodating cavity 2 formed by the recess from mating surface 1.

[0034] Mating surface 1 is the surface for cooperating with second die 200 in first die 100, when the first die 100 cooperates with second die 200, the mating surface 1 of first die 100 can face second die 200, and part of mating surface 1 can be used to enclose the slit outlet 400 of coating head.

[0035] Referring to Figure 3 The accommodation cavity 2 is used to accommodate the coating slurry. When the coating slurry is supplied to the coating head, the coating slurry will first flow into the accommodation cavity 2 and gradually fill the accommodation cavity 2. The accommodation cavity 2 includes a first end 21 and a second end 22 opposite to each other. The first end 21 of the accommodation cavity 2 is an end away from the liquid outlet position of the coating head, and the second end 22 of the accommodation cavity 2 is an end adjacent to the liquid outlet position of the coating head. Specifically, the first end 21 of the accommodation cavity 2 can be the upper end of the accommodation cavity 2, and the second end 22 of the accommodation cavity 2 can be the lower end of the accommodation cavity 2. The liquid outlet position of the coating head is the position of the slit outlet 400.

[0036] Referring to Figure 1 In the existing coating head, the accommodation cavity 2' includes a rectangular space and a reverse "v" type space formed by protruding upward from the rectangular space. The volume of the accommodation cavity 2' is large. During the coating operation, the coating slurry will gradually fill the accommodation cavity 2', and in order to ensure the uniformity of the coating slurry flow during the coating process, it is necessary to ensure that the accommodation cavity 2' is filled with the coating slurry, and after the coating is completed, the accommodation cavity 2' is still filled with the coating slurry, and this part of the coating slurry will form waste. With the increase of the volume of the accommodation cavity 2', more coating slurry remains in the accommodation cavity 2' after the coating is completed, resulting in more waste, low material utilization rate and high production cost.

[0037] In the present application, the first end 21 of the accommodation cavity 2 is formed with a recess towards the second end 22. The recess can reduce the volume of the accommodation cavity 2. Specifically, the accommodation cavity 2 of the present application can be a rectangular space with a recess. Compared with the accommodation cavity 2' in the prior art, the accommodation cavity 2 of the present application does not have a reverse "v" type space formed by protruding, and the volume of the rectangular space is further reduced by the recess structure. Therefore, the accommodation cavity 2 of the present application has a smaller volume, and less coating slurry remains in the accommodation cavity 2 after the coating is completed, which can effectively reduce the waste of coating slurry, improve the material utilization rate and reduce the production cost.

[0038] Specifically, the first end 21 of the accommodation cavity 2 includes a first top wall 23 and a second top wall 24 connected to each other. One end of the first top wall 23 is connected to the corresponding side wall of the accommodation cavity 2, and the other end of the first top wall 23 is inclined towards the second end 22. One end of the second top wall 24 is connected to the corresponding side wall of the accommodation cavity 2, and the other end of the second top wall 24 is inclined towards the second end 22 and connected to the first top wall 23, so that the first top wall 23 and the second top wall 24 form a "v" type structure to form a "v" type recess of the accommodation cavity 2. The connection between the first top wall 23 and the second top wall 24 is located at the middle position of the accommodation cavity 2.

[0039] The inclination angles of the first top wall 23 and the second top wall 24 can be 1-10°, respectively. Specifically, the included angle a between the first top wall 23 and the horizontal plane can be 1-10°, and the included angle β between the second top wall 24 and the horizontal plane can be 1-10°. Preferably, the included angle between the first top wall 23 and the horizontal plane is the same as the included angle between the second top wall 24 and the horizontal plane. Therefore, the accommodating cavity 2 of the present application forms a left-right symmetrical structure, and when the coating slurry is filled into the accommodating cavity 2, the coating slurry can fill the left and right parts of the accommodating cavity 2 at approximately the same amount and time, thereby improving the filling efficiency of the coating slurry in the accommodating cavity 2.

[0040] Referring to Figure 2 and Figure 5 When the first top wall 23 and the second top wall 24 are inclined, the middle position of the first end 21 of the accommodating cavity 2 is recessed and lower than the edge position, and the end of the first end 21 of the accommodating cavity 2 forms the topmost end of the accommodating cavity 2. Therefore, the first corner space 25 formed between the first top wall 23 and the adjacent side wall of the accommodating cavity 2 can be located at the topmost end of the accommodating cavity 2, and the second corner space 26 formed between the second top wall 24 and the adjacent side wall of the accommodating cavity 2 can be located at the topmost end of the accommodating cavity 2. Among them, the first corner space 25 and the second corner space 26 are at the same height. In other embodiments, the first corner space 25 and the second corner space 26 can also be at the same height, the first corner space 25 is slightly higher than the second corner space 26, or the first corner space 25 is slightly lower than the second corner space 26; and the first corner space 25 is the highest part of the left half of the accommodating cavity 2, and the second corner space 26 is the highest part of the right half of the accommodating cavity 2.

[0041] The first die 100 can be provided with a first exhaust hole 4 extending to and communicating with the first corner space 25. The first exhaust hole 4 can extend from the first corner space 25 of the accommodating cavity 2 to the outer side wall 6 of the first die 100 in the first direction. The gas in the accommodating cavity 2 can be discharged from the first exhaust hole 4. By communicating the first exhaust hole 4 with the first corner space 25 located at the topmost end of the accommodating cavity 2, the gas can be easily discharged, and it is ensured that the coating slurry can effectively fill the accommodating cavity 2. Among them, the first direction can be inclined relative to the horizontal direction, and the height of the first exhaust hole 4 from the accommodating cavity 2 to the outer side wall 6 gradually increases, so as to facilitate the discharge of gas. The included angle between the first direction and the horizontal direction is preferably 5-20°.

[0042] In addition, the first die 100 can be further provided with a second exhaust hole 5 extending to and communicating with the second corner space 26. The second exhaust hole 5 can extend from the second corner space 26 of the accommodation cavity 2 to the first die 100 in the first direction. The gas in the accommodation cavity 2 can be discharged from the accommodation cavity 2 through the second exhaust hole 5 communicating with the second corner space 26. By communicating the second exhaust hole 5 with the second corner space 26 located at the top end of the accommodation cavity 2, the discharge of the gas can be facilitated, and it is ensured that the coating paste can effectively fill the accommodation cavity 2. Wherein, the height of the second exhaust hole 5 from the accommodation cavity 2 to the outer side wall 6 gradually increases.

[0043] When the coating paste is filled into the accommodation cavity 2, the gas adjacent to the first exhaust hole 4 part (the left half of the accommodation cavity 2) is discharged from the accommodation cavity 2 through the first exhaust hole 4, and the gas adjacent to the second exhaust hole 5 part (the right half of the accommodation cavity 2) is discharged from the accommodation cavity 2 through the second exhaust hole 5. In other embodiments, the first die 100 can be provided with only one exhaust hole, for example, only the first exhaust hole 4 or the second exhaust hole 5, and the gas in the accommodation cavity 2 is discharged through only one exhaust hole. As a preferred embodiment, the first die 100 is provided with the first exhaust hole 4 and the second exhaust hole 5.

[0044] Referring to Figure 1 and Figure 2 In the existing coating head, the exhaust hole 4' extends from the top of the coating head to the accommodation cavity 2' of the coating head, and the exhaust hole 4' generally communicates with the middle part of the inverted "v" type space formed by the protrusions in the accommodation cavity 2', and the gas in the accommodation cavity 2' converges in the inverted "v" type space towards the exhaust hole 4' and is discharged from the exhaust hole 4'. This arrangement requires the exhaust hole 4' to communicate with the inverted "v" type space above the accommodation cavity 2' to facilitate the convergence of the gas in the inverted "v" type space, and therefore, this arrangement can cause the volume of the accommodation cavity 2' to increase. In the present application, the exhaust hole extends horizontally to the first die 100, which does not need to cooperate with the inverted "v" type space, and can facilitate the reduction of the volume of the accommodation cavity 2 and reduce the waste of the coating paste.

[0045] Referring to Figure 4 In the present application, the depth d of the accommodation cavity 2 recessed from the mating surface 1 can be 3-5 mm, the height h of the accommodation cavity 2 can be 5-6 mm, and the volume of the accommodation cavity 2 can be 10-15 ml. Referring to Figure 2 In the existing coating head, the depth d' of the accommodation cavity 2' recessed from the mating surface 1' is generally 5-10 mm, the height h' of the accommodation cavity 2' is generally 10-15 mm, and the volume of the accommodation cavity 2' is generally 40-50 ml. As can be seen, the arrangement of the accommodation cavity 2 in the present application significantly reduces the volume of the accommodation cavity 2, thereby effectively reducing the waste of the coating paste. Moreover, through actual coating tests, the coating head of the present application can meet the required process requirements.

[0046] With reference to Figure 4 In the present application, the feed hole 3 of the first die head 100 can be connected with the middle part of the accommodating cavity 2, and specifically can be connected with the upper side of the middle part of the accommodating cavity 2. The feed hole 3 can extend horizontally through the first die head 100, and the aperture of the feed hole 3 can be 0.5-3 mm. In the existing coating head, the aperture of the feed hole 3' generally needs to be set to 1-5 mm. The aperture of the feed hole 3 of the first die head 100 of the present application can be smaller than the aperture of the feed hole 3' of the existing coating head, thereby reducing the volume of the feed hole 3 and reducing the amount of coating paste remaining in the feed hole 3, further reducing the waste of coating paste.

[0047] With reference to Figure 8 The inner wall 201 of the second die head 200 facing the mating surface 1 of the first die head 100 can be a plane, and the plane structure of the inner wall 201 can be used together with the wall forming the accommodating cavity 1 to form a material accommodating cavity of the coating head, which is used to accommodate the coating paste. Alternatively, with reference to Figure 7 In yet another embodiment, the second die head 200 can be provided with a structure similar to the first die head 100, and the second die head 200 is provided with a concave cavity 202 which has the same structure as the accommodating cavity 2 of the first die head 100, and the concave cavity 202 is recessed from the inner wall 201 of the second die head 200, and the concave cavity 202 can be communicated with the accommodating cavity 2 and used together to constitute a material accommodating cavity of the coating head. Wherein, the second die head 200 can also be provided with an exhaust hole and a feed hole, and the exhaust hole and the feed hole of the second die head 200 can have the same structure as the exhaust hole and the feed hole 3 of the first die head, or the second die head 200 is not provided with the exhaust hole and the feed hole, or the second die head 200 is only provided with one of the exhaust hole and the feed hole.

[0048] The gasket 300 is arranged between the first die head 100 and the second die head 200 and is used to separate the first die head 100 and the second die head 200, and the gasket 300 can abut the mating surface 1 of the first die head 100 and the inner wall 201 of the second die head 200, respectively. The gasket 300 is provided with a notch below, and the gasket 300 forms a slit at the position corresponding to the notch, which can be used as a slit outlet 400 for the paste to be discharged from the coating head.

[0049] Although the embodiments of the present application have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those skilled in the art can make changes, modifications, replacements and variations to the above embodiments without departing from the principles and purposes of the present application within the scope of the present application. All these changes should be within the protection scope of the claims of the present application.

Claims

1. A coating head, characterized in that, The coating head includes a first die (100) and a second die (200); wherein the first die (100) includes: The mating surface (1) is used to mate with the second mold head (200); The receiving cavity (2) is recessed from the mating surface (1) and is used to receive the coating slurry. The receiving cavity (2) includes a first end (21) and a second end (22) opposite to each other. The second end (22) of the receiving cavity (2) is the end adjacent to the liquid outlet position of the coating head. The first end (21) of the receiving cavity (2) is formed with a recess facing the second end (22).

2. The coating head according to claim 1, characterized in that, The middle of the first end (21) of the accommodating cavity (2) is recessed toward the second end (22) to form a "V" shaped recess.

3. The coating head according to claim 2, characterized in that, The first end (21) of the accommodating cavity (2) includes a first top wall (23) and a second top wall (24) forming a "V"-shaped recess, wherein the angles between the first top wall (23) and the second top wall (24) and the horizontal plane are 1-10° respectively.

4. The coating head according to claim 3, characterized in that, The first corner space (25) formed between the first top wall (23) and the adjacent side wall of the accommodating cavity (2) is located at the top of the accommodating cavity (2), and the coating head is provided with a first exhaust hole (4) communicating with the first corner space (25); And / or, the second corner space (26) formed between the second top wall (24) and the adjacent side wall of the accommodating cavity (2) is located at the top of the accommodating cavity (2), and the coating head is provided with a second exhaust hole (5) communicating with the second corner space (26).

5. The coating head according to claim 4, characterized in that, The first vent (4) and the second vent (5) extend horizontally from the accommodating cavity (2) to the coating head.

6. The coating head according to claim 1, characterized in that, The recess depth of the accommodating cavity (2) is 3-5mm, and the height of the accommodating cavity (2) is 5-6mm.

7. The coating head according to claim 1, characterized in that, It also includes a feed hole (3), which is connected to the middle of the accommodating cavity (2) and extends horizontally.

8. The coating head according to claim 7, characterized in that, The diameter of the feed hole (3) is 0.5-3mm.

9. The coating head according to claim 1, characterized in that, The volume of the accommodating cavity (2) is 10-15 ml.

10. The coating head according to claim 1, characterized in that, The inner wall (201) of the second die head (200) facing the mating surface (1) is a plane, and the inner wall (201) and the wall forming the receiving cavity (2) enclose the material receiving cavity of the coating head; Alternatively, the second die head (200) is provided with a cavity (202) with the same structural form as the accommodating cavity (2), and the cavity (202) and the accommodating cavity (2) are used together to form the material accommodating cavity of the coating head.

Images