Coating die head capable of reducing die assembly stress

Abstract

The utility model discloses a coating die head capable of reducing die assembly stress. The coating die head comprises a first die, a second die, a gasket and a connecting piece, the first die is provided with a right-hand threaded hole extending in the width direction. The second die is provided with a left-hand threaded hole extending in the width direction. The gasket is provided with a through hole, and the gasket is arranged between the first die and the second die and enables the first die and the second die to form a discharging slit. According to the coating die head gasket, rapid die assembly can be carried out, the die assembly efficiency is improved, and the first die and the second die on the two sides of the coating die head gasket are connected with the connecting piece in the same threaded meshing mode, so that the connecting piece and the two die heads are kept in the same stress state; the problem that due to the fact that stress borne by one die head covered by a screw gasket is concentrated, local deformation of the die head is caused is effectively solved, the problem that due to the fact that the deformation degrees of the die heads on the two sides of a slit in the corresponding position of a coating head are different, the gap width of the slit is not uniform is solved, and high consistency of the discharging slit of the coating head can be easily kept; and the subsequent coating quality is ensured.

Description

Technical Field

[0001] The present invention relates to the technical field of perovskite coating, and particularly to a coating die head for reducing clamping stress. Background Art

[0002] The slot die head is a key high-precision component of the slot coating equipment. For the slot die head for perovskite coating films, the slot width is only 50 - 100 μm. When the slot error exceeds 2 μm, the coating film unevenness phenomenon will occur. This requirement is much higher than that of industries such as lithium batteries, etc., so higher requirements are put forward for the slot precision of the coating equipment.

[0003] For the existing slot die heads, due to the unreasonable assembly method, the consistency of the width of the discharge slot is poor and needs to be improved urgently. Summary of the Invention

[0004] The purpose of the present invention is to provide a coating die head for reducing clamping stress, which is used for quickly clamping the die and making the forces on both sides of the die head balanced, reducing the deformation of the die head due to stress concentration, and keeping the discharge slot highly consistent.

[0005] The purpose of the present invention is achieved by adopting the following technical solutions:

[0006] A coating die head for reducing clamping stress, comprising:

[0007] A first die, provided with a positive threaded hole extending along the width direction;

[0008] A second die, provided with a reverse threaded hole extending along the width direction;

[0009] A gasket, provided with a through hole, the gasket is arranged between the first die and the second die and makes the first die and the second die form a discharge slot;

[0010] A connecting member, the connecting member is used to pass through the through hole of the gasket, the outer surface of the connecting member on one side of the gasket is a positive threaded area, the outer surface of the connecting member on the other side of the gasket is a reverse threaded area, the positive threaded area is threadedly connected with the positive threaded hole, and the reverse threaded area is threadedly connected with the reverse threaded hole, so that when the connecting member rotates, it can make the first die and the second die move synchronously towards the gasket and be clamped and fixed.

[0011] Preferably, the coating die head for reducing clamping stress has a first end and a second end opposite to each other along the length direction, the first die is provided with a plurality of positive threaded holes arranged at intervals from the first end to the second end, and the second die is provided with a plurality of reverse threaded holes arranged at intervals from the first end to the second end;

[0012] The coating die head for reducing the mold clamping stress includes a plurality of connecting members, and each of the positive threaded holes and each of the reverse threaded holes are in one-to-one correspondence and are respectively provided with one of the connecting members.

[0013] Preferably, each of the connecting members has the same shape, so that the first mold and the second mold move towards the gasket at the same speed synchronously.

[0014] Preferably, the length of the positive threaded area and the length of the reverse threaded area of the connecting member are the same.

[0015] Preferably, the connecting member further includes at least one adjusting portion, and the adjusting portion is used to cooperate with an external tool to adjust the rotation of the connecting member.

[0016] Preferably, the adjusting portion is a socket provided at one end of the connecting member, the external tool is a wrench, and the shape of the socket matches the shape of the acting end of the wrench.

[0017] Preferably, the adjusting portion is a nut provided at one end of the connecting member, the external tool is a wrench with a groove, and the shape of the nut matches the shape of the groove of the wrench.

[0018] Preferably, the adjusting portions of the plurality of connecting members are located on the same side of the coating die head, and rotate in the same direction when the mold is clamped and fixed.

[0019] Preferably, the plurality of connecting members are arranged at equal intervals along the length direction of the coating die head.

[0020] Preferably, the positions of the plurality of positive threaded holes are the same in the thickness direction of the first mold, and the positions of the plurality of reverse threaded holes are the same in the thickness direction of the second mold.

[0021] Compared with the prior art, the beneficial effects of the present invention at least include:

[0022] During the mold clamping and assembling process of the above coating die head, by adjusting the rotation of the connecting member, the first mold and the second mold on both sides move synchronously towards the middle along both ends of the connecting member under the cooperation of the positive threaded holes and the reverse threaded holes respectively, so that rapid mold clamping can be carried out, improving the mold clamping and assembling efficiency. Moreover, the first mold and the second mold on both sides of the gasket of the coating die head are connected to the connecting member by the same thread biting method, so that the connecting member and the two mold heads are in the same stress state, effectively solving the problem that the stress on one of the mold heads covered by the screw washer is relatively concentrated, which causes local deformation of the mold head, and preventing the problem that the slit spacing width is uneven due to different deformation degrees of the two mold heads on both sides of the coating head corresponding part, which helps to keep the discharge slit of the coating head highly consistent and ensure the subsequent coating film quality. Brief Description of the Drawings

[0023] Figure 1 is a schematic structural view of a slit coating head of the prior art;

[0024] Figure 2 is Figure 1 Schematic diagram of the stress state during the assembly of the slit coater head;

[0025] Figure 3 Schematic diagram of the structure of the connecting body of the coating die head according to an embodiment of the present invention;

[0026] Figure 4 Schematic diagram of the structure of the coating die head before assembly according to an embodiment of the present invention;

[0027] Figure 5 Schematic diagram of the structure of the coating die head during the assembly process according to an embodiment of the present invention;

[0028] Figure 6 Schematic diagram of the structure of the coating die head after the assembly is completed according to an embodiment of the present invention.

[0029] In the figure: 101, the first die; 102, the gasket; 103, the second die; 104, the clamping screw; 105, the screw hole; 106, the screw washer; 201, the connecting member; 202, the reverse thread area; 203, the positive thread area; 204, the adjusting portion; 301, the wrench; 302, the reverse thread hole; 303, the positive thread hole; 4, the discharge slit. Detailed implementation manners

[0030] Now, the exemplary embodiments will be described more fully with reference to the accompanying drawings. However, the exemplary embodiments can be implemented in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this invention will be more complete and comprehensive, and the concept of the exemplary embodiments will be fully conveyed to those skilled in the art. Identical reference numerals in the figures denote identical or similar structures, and thus their repetitive description will be omitted.

[0031] The words expressing positions and directions described in the present invention are all illustrated by taking the accompanying drawings as examples, but can be changed according to needs, and all the changes made are included in the protection scope of the present invention.

[0032] As Figure 1 shown, in the existing slit coater head, the coater head includes a first die 101 and a second die 103, a gasket 102 is provided inside the coater head, the gasket 102 is located between the first die 101 and the second die 103, the clamping screws 104 respectively pass through the first die 101, the gasket 102 and the second die 103, the clamping screws 104 are connected to the screw holes 105 corresponding to the second die 103, a screw washer 106 is provided outside the first die 101, the clamping screws 104 pass through the screw washer 106, and d is the spacing of the discharge slit 4.

[0033] The pitch consistency of the discharge slit 4 of the above-mentioned slit coater is relatively poor. After in-depth research, the inventors of the present invention found that the reasons for the above problems are as follows. When the clamping screws 104 are tightened with a constant torque, the force conditions of the first die 101 and the second die 103 of the coater are as Figure 2 shown. The first die 101 is downwardly pressed by the screw washer 106, and the second die 103 is subjected to the overall thread tension of the clamping screw 104 and the screw hole 105. Since the force on the first die 101 is relatively concentrated, it will cause local deformation in the area covered by the screw washer 106. This local deformation will drive slight deformation (micrometer level, less than 10 micrometers) at the die orifice of the discharge slit 4 of the first die 101, resulting in a micrometer-level change in d, causing uneven d values, and ultimately leading to poor consistency of the coater slit and unqualified coating films.

[0034] In view of the above defects discovered by the inventors, referring to Figures 3 to 6 , the present invention provides a coating die head for reducing clamping stress, including: a first die 101, a second die 103, a gasket 102, and a connecting member 201.

[0035] The first die 101 is provided with a right-handed threaded hole 303 extending in the width direction; as a preferred embodiment, the coating die head for reducing clamping stress has a first end and a second end opposite to each other in the length direction, and the first die 101 is provided with a plurality of right-handed threaded holes 303 spaced from the first end to the second end. It should be noted that the right-handed threaded hole 303 can be provided on the first die 101 in a through or non-through manner, and there is no unique limitation here, but one end opening of the right-handed threaded hole 303 needs to be located on the clamping side of the first die 101, and the plurality of right-handed threaded holes 303 are in the same position in the thickness direction of the first die 101, that is, the right-handed threaded hole 303 is arranged parallel to the thickness direction of the first die 101.

[0036] The second die 103 is provided with a left-handed threaded hole 302 extending in the width direction; as a preferred embodiment, the second die 103 is provided with a plurality of left-handed threaded holes 302 spaced from the first end to the second end. It should be noted that the left-handed threaded hole 302 can also be provided on the second die 103 in a through or non-through manner, and there is no unique limitation here, but one end opening of the left-handed threaded hole 302 needs to be located on the clamping side of the second die 103, and the plurality of left-handed threaded holes 302 are in the same position in the thickness direction of the second die 103, that is, the left-handed threaded hole 302 is arranged parallel to the thickness direction of the second die 103. When the first die 101 and the second die 103 are clamped, the openings on the clamping sides of the right-handed threaded hole 303 and the left-handed threaded hole 302 correspond one by one, and their central axes coincide.

[0037] The gasket 102 is provided with through holes. The gasket 102 is arranged between the first die 101 and the second die 103 and enables the first die 101 and the second die 103 to form a discharge slit 4. Among them, there are multiple through holes which are arranged at intervals along the length direction of the gasket 102. Specifically, when the gasket 102 is installed between the first die 101 and the second die 103, its through holes respectively correspond to the positive threaded holes 303 and the reverse threaded holes 302, so that the connecting piece 201 can correspondingly pass through the through holes and the positive threaded holes 303 and the reverse threaded holes 302 corresponding to the through holes, realizing the connection between the connecting piece 201 and the positive threaded holes 303 and the reverse threaded holes 302 on both sides respectively.

[0038] The connecting piece 201 is used to pass through the through hole of the gasket 102. The outer surface of the connecting piece 201 on one side of the gasket 102 is a positive threaded area 203, and the outer surface of the connecting piece 201 on the other side of the gasket 102 is a reverse threaded area 202. The positive threaded area 203 is threadedly connected to the positive threaded hole 303, and the reverse threaded area 202 is threadedly connected to the reverse threaded hole 302, so as to adjust that when the connecting piece 201 rotates, the first die 101 and the second die 103 can move synchronously towards the gasket 102 and be fixed by clamping. Among them, the coating die head for reducing the clamping stress includes multiple connecting pieces 201. Each positive threaded hole 303 and each reverse threaded hole 302 correspond one by one and are respectively provided with a connecting piece 201, and preferably, the multiple connecting pieces 201 are arranged at equal intervals along the length direction of the coating die head, so that a connecting piece 201 provides a locking force at a certain distance in the length direction of the coating die head, improving the clamping and fixing quality of the die head.

[0039] Refer to Figure 3 and Figure 4, each connecting member 201 has the same shape, so that the first die 101 and the second die 103 move towards the gasket 102 at the same speed synchronously. Specifically, the length of the positive-thread area 203 of the connecting member 201 is the same as the length of the reverse-thread area 202, ensuring that the connection paths of the positive-thread holes 303 of the first die 101 and the reverse-thread holes 302 of the second die 103 are of the same length, and ensuring that the first die 101 and the second die 103 after mold clamping and fixing have the same-length engagement areas with the connecting member 201, maintaining the balanced force on the two die heads. Each connecting member 201 passes through the through-hole of the gasket 102 and is respectively connected to a set of positive-thread holes 303 and reverse-thread holes 302 at both ends. By adjusting the rotation of multiple connecting members 201, the first die 101 and the second die 103 move from both ends of the connecting member 201 towards the middle along the positive-thread area 203 and the reverse-thread area 202 respectively, finally realizing the mold clamping and fixing of the first die 101 and the second die 103, and an outlet slit 4 can be formed between the first die 101 and the second die 103 under the action of the gasket 102; the connection force between the first die 101 and the second die 103 and the connecting member 201 is provided by the threaded tooth engagement part, solving the problem of local stress deformation of the die head in the area covered by the screw washer 106 caused by the concentrated force on the screw washer 106, and avoiding the problem of deformation of the outlet slit 4 of the die orifice further caused by the local stress deformation of the die head.

[0040] Thus, during the mold clamping process of the coating die head, by adjusting the rotation of the connecting member 201, the first die 101 and the second die 103 on both sides move towards the middle synchronously along both ends of the connecting member 201 under the cooperation of the positive-thread holes 303 and the reverse-thread holes 302 respectively, enabling rapid mold clamping and improving the mold clamping assembly efficiency. Moreover, the first die 101 and the second die 103 on both sides of the coating die head gasket 102 are both connected to the connecting member 201 by the same threaded engagement method, making the connecting member 201 maintain the same stress state with both die heads (as Figure 6 shown), reducing the mold clamping stress, effectively solving the situation of local deformation of the die head caused by the concentrated stress on one die head covered by the screw washer 106, and preventing the problem of uneven width of the slit spacing due to different degrees of deformation of the two die heads at the corresponding position of the coating head, which helps to keep the outlet slit 4 of the coating head highly consistent and ensure the subsequent coating film quality.

[0041] In this embodiment, a smooth section may be provided on the surface of the connecting member 201 at the connection between the right-handed thread section 203 and the left-handed thread section 202. The smooth section of the connecting member 201 is used to pass through the through hole of the gasket 102. Among them, the lengths of the right-handed thread section 203 and the left-handed thread section 202 are preferably equal, and the length of the smooth section is not greater than the thickness d of the gasket 102. After the first die 101 and the second die 103 are clamped and fixed, the through hole of the gasket 102 completely covers the smooth section of the connecting member 201, that is, the length of the smooth section is less than or equal to the thickness of the gasket 102, and both sides of the gasket 102 are respectively subjected to the extrusion of the first die 101 and the second die 103, and a discharge slit 4 with a width of d is formed between the first die 101 and the second die 103. At this time, the inner end of the right-handed thread section 203 coincides with the inner end of the right-handed thread hole 303 or is located inside the right-handed thread hole 303, and the inner end of the left-handed thread section 202 coincides with the inner end of the left-handed thread hole 302 or is located inside the left-handed thread hole 302.

[0042] It should be noted that the connecting member 201 can be set to a structure with a large diameter in the middle and small diameters at both ends, that is, the diameter of the smooth section is large, and the diameters of the right-handed thread section 203 and the left-handed thread section 202 on both sides are slightly smaller, so that the thread teeth on the surfaces of the right-handed thread section 203 and the left-handed thread section 202 do not protrude compared with the smooth section, so as to prevent the interference between the thread teeth and the through hole during the process of inserting the connecting member 201 into the gasket 102. In order to ensure that the connection forces between the connecting member 201 and the first die 101 and the second die 103 are equal, the outer diameters of the right-handed thread section 203 and the left-handed thread section 202 are preferably equal.

[0043] Refer to Figure 3 , the connecting member 201 further includes at least one adjusting portion 204, and the adjusting portion 204 is used to cooperate with an external tool to adjust the rotation of the connecting member 201. As a preferred method, the adjusting portion 204 is a socket provided at one end of the connecting member 201, the external tool is a wrench 301, and the shape of the socket matches the shape of the acting end of the wrench 301. When adjusting the rotation of the connecting member 201, the acting end of the wrench 301 is inserted into the socket, and the connecting member 201 is rotated to make the first die 101 and the second die 103 on both sides move synchronously inward at the same time; as an example, when the wrench 301 is a hexagon wrench, the shape of the socket is an internal hexagon groove.

[0044] As an alternative, the adjusting part 204 can also be a nut provided at one end of the connecting member 201, and the external tool is a wrench 301 with a groove, and the shape of the nut matches the shape of the groove of the wrench 301. When adjusting the rotation of the connecting member 201, the grooved end of the wrench 301 is sleeved on the nut at one end of the connecting member 201. Adjusting the rotation of the connecting member 201 can also achieve the effect of simultaneously moving the two side die heads inward and fixing them synchronously; it should be noted that the wrench 301 can also be set to other structures in the prior art, and the connecting member 301 can be adaptively set to its corresponding structure, which is not limited uniquely here.

[0045] In this embodiment, the adjusting parts 204 of the plurality of connecting members 201 are preferably located on the same side of the coating die head and rotate in the same direction during mold closing and fixing. Setting the adjusting parts 204 of the plurality of connecting members 201 on the same side of the coating die head facilitates adjusting the rotation of 201 simultaneously in the same direction and reduces the process difficulty of mold closing and assembly.

[0046] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Without departing from the principle and purpose of the present invention, those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the invention, and all such changes should fall within the protection scope of the claims of the present invention.

Claims

1. A coating die for reducing clamping stress, characterized in that, Comprising: A first die (101) provided with a right-threaded hole (303) extending in the width direction; A second die (103) provided with a left-threaded hole (302) extending in the width direction; A gasket (102) provided with a through hole, the gasket (102) being disposed between the first die (101) and the second die (103) and causing the first die (101) and the second die (103) to form a discharge slit (4); A connecting member (201), the connecting member (201) being adapted to pass through the through hole of the gasket (102), an outer surface of the connecting member (201) on one side of the gasket (102) being a right-threaded region (203), an outer surface of the connecting member (201) on the other side of the gasket (102) being a left-threaded region (202), the right-threaded region (203) being threadedly connected to the right-threaded hole (303), and the left-threaded region (202) being threadedly connected to the left-threaded hole (302), so that when the connecting member (201) rotates, the first die (101) and the second die (103) can move synchronously towards the gasket (102) and be clamped and fixed.

2. The coating die for reducing clamping stress according to claim 1, wherein The coating die head for reducing the clamping stress has a first end and a second end opposite to each other in the length direction, the first die (101) being provided with a plurality of right-threaded holes (303) spaced from the first end to the second end, and the second die (103) being provided with a plurality of left-threaded holes (302) spaced from the first end to the second end; The coating die head for reducing the clamping stress includes a plurality of connecting members (201), and each of the right-threaded holes (303) and each of the left-threaded holes (302) correspond one-to-one and are respectively provided with one of the connecting members (201).

3. The coating die for reducing the clamping stress according to claim 2, characterized in that, Each of the connecting members (201) has the same shape, so that the first die (101) and the second die (103) move towards the gasket (102) at the same speed.

4. The coating die for reducing clamping stress according to claim 2, wherein The lengths of the right-threaded region (203) and the left-threaded region (202) of the connecting member (201) are the same.

5. The coating die for reducing mold clamping stress according to claim 2, wherein The connecting member (201) further includes at least one adjusting portion (204), and the adjusting portion (204) is adapted to cooperate with an external tool to adjust the rotation of the connecting member (201).

6. The coating die for reducing the mold clamping stress according to claim 5, characterized in that, The adjusting portion (204) is a socket provided at one end of the connecting member (201), the external tool is a wrench (301), and the shape of the socket matches the shape of the acting end of the wrench (301).

7. The coating die for reducing clamping stress according to claim 5, wherein The adjusting portion (204) is a nut provided at one end of the connecting member (201), the external tool is a wrench (301) with a groove, and the shape of the nut matches the shape of the groove of the wrench (301).

8. The coating die for reducing clamping stress according to claim 5, characterized in that, The adjusting portions (204) of the plurality of connecting members (201) are located on the same side of the coating die head and rotate in the same direction when clamped and fixed.

9. The coating die for reducing clamping stress according to claim 2, wherein, The plurality of connecting members (201) are equally spaced along the length direction of the coating die head.

10. The coating die for reducing the mold clamping stress according to claim 2, wherein The positions of the plurality of right-threaded holes (303) are the same in the thickness direction of the first die (101), and the positions of the plurality of left-threaded holes (302) are the same in the thickness direction of the second die (103).

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