Perovskite coating die head of fixed lip upper and lower die fine adjustment screw structure

Abstract

The invention provides a perovskite coating die head of a fixed lip upper and lower die fine adjustment screw structure, which comprises an upper die body and a lower die body, the top surface of the lower die body is a plane, the bottom surface of the upper die body comprises a sealing surface arranged in a step surface form and positioned in a rear area and a shaping surface positioned in a front area, and the height of the shaping surface is higher than that of the sealing surface. A feeding port vertically penetrating through the upper die body is formed in the middle of the rear end of the shaping face, a left check block and a right check block for sealing the left side and the right side of the runner are arranged on the left side and the right side of the upper die body correspondingly, and the sealing face, the left check block and the right check block of the upper die body are fixedly connected to the top face of the lower die body through die assembly screws correspondingly. A long-strip-shaped fine adjustment groove in the breadth direction is formed in the bottom face of the front end of the lower die body, first fine adjustment mechanisms are arranged in the lower die body, the first fine adjustment mechanisms penetrate through the long-strip-shaped fine adjustment groove and then are connected to the front side wall of the lower die body, and the first fine adjustment mechanisms are evenly distributed in the breadth direction. The lip gap of the die lip can be finely adjusted.

Description

Technical Field

[0001] The invention relates to the field of coating die heads, in particular to a perovskite coating die head with a fixed lip upper and lower die fine-tuning screw structure. Background Art

[0002] The lip gap of a fixed-lip coating die is fixed and cannot be altered by changing the thickness of the gasket. Compared to gasket-type coating dies, fixed-lip coating dies offer a simpler structure, lower maintenance costs and failure rates, a reduced risk of die leakage, and the ability to withstand higher coating pressures. They also offer high coating stability, excellent coating thickness uniformity, and high coating precision, making them suitable for high-volume production with mature process conditions.

[0003] At the same time, the disadvantage of the fixed lip is its poor flexibility. During machine testing and debugging, if there are minor defects in the product, the fixed lip die head will find it difficult to make targeted adjustments to the defects. Summary of the Invention

[0004] In response to the above problems, the present invention aims to provide a perovskite coating die head with a fixed lip upper and lower die fine-tuning screw structure, which has a novel structure, high coating accuracy, and can fine-tune the die lip gap.

[0005] The technical solution of the present invention is a perovskite coating die head with a fixed lip upper and lower die fine-tuning screw structure, comprising an upper die body and a lower die body, characterized in that: the top surface of the lower die body is a plane, the bottom surface of the upper die body comprises a sealing surface located in the rear area and a shaping surface located in the front area arranged in a stepped surface, the height of the shaping surface is higher than the height of the sealing surface, and the height difference between the two is the flow channel gap, a feed port vertically penetrating the upper die body is provided at the middle of the rear end of the shaping surface, and left and right stops are respectively provided on the left and right sides of the sealing flow channel on the upper die body, the sealing surface, left stop and right stop of the upper die body are respectively connected and fixed to the top surface of the lower die body by mold clamping screws, a long strip fine-tuning groove along the width direction is provided on the bottom surface of the front end of the lower die body, a first fine-tuning mechanism is provided in the lower area of ​​the lower die body, and the first fine-tuning mechanism passes through the long strip fine-tuning groove and is connected to the front side wall of the lower die body to adjust the die lip gap, and the number of the first fine-tuning mechanisms is multiple and evenly arranged along the width direction.

[0006] Preferably, the first fine-tuning mechanism includes a first fine-tuning nut, a first fine-tuning push-pull rod, a first nut and a first thrust washer, and the lower part of the lower mold body is provided with a series of first threaded holes along the front-to-back direction, the starting end of the first threaded hole is located on the rear side surface of the lower mold body, and the ending end of the first threaded hole is located in the lower mold body in front of the elongated fine-tuning groove, the outer side surface of the first fine-tuning nut is provided with an external thread adapted to the first threaded hole, and the inner side of the first fine-tuning nut is provided with an internal thread threadedly connected to the first fine-tuning push-pull rod, the front end of the first fine-tuning push-pull rod passes through the elongated fine-tuning groove and is screwed into the lower mold body in front and locked by the first nut and the first thrust washer, the first nut and the first thrust washer are located in the elongated fine-tuning groove, the pitch of the external thread of the first fine-tuning nut is greater than the pitch of the internal thread, and the lower mold body in front of the elongated fine-tuning groove is deformed by twisting the first fine-tuning nut to pull or push the first fine-tuning push-pull rod to adjust the mold lip gap.

[0007] Preferably, a flow channel cavity is provided between the sealing surface and the shaping surface of the bottom surface of the upper mold body, the height of the flow channel cavity is higher than the height of the shaping surface, and the flow channel cavity runs through the left and right sides of the upper mold body along the width direction.

[0008] Preferably, the bottom of the feed port is connected to the middle area of ​​the flow channel cavity.

[0009] Preferably, the flow channel cavity and the sealing surface are transitioned to an arc-shaped concave curved surface, and the flow channel cavity and the shaping surface are transitioned to an inclined plane.

[0010] Preferably, an exhaust hole is provided on the top of the upper mold body, the top of the exhaust hole vertically penetrates the top surface of the upper mold body, the bottom of the exhaust hole is located on the sealing surface of the upper mold body, and an exhaust groove is provided on the sealing surface. The rear end of the exhaust groove is connected to the exhaust hole, and the front end of the exhaust groove is connected to the flow channel cavity.

[0011] Preferably, there are three exhaust holes, which are respectively located at the left end, the middle and the right end of the upper mold body.

[0012] Preferably, fine-tuning grooves are provided in the front top surface areas at the left and right ends of the upper mold body, and a second fine-tuning mechanism is provided in the upper mold body. The second fine-tuning mechanism passes through the fine-tuning grooves and is connected to the front side wall of the upper mold body to adjust the mold lip gap.

[0013] Preferably, there are multiple second fine-tuning rod mechanisms and they are evenly arranged along the width direction.

[0014] Preferably, the second fine-tuning mechanism includes a second fine-tuning nut, a second fine-tuning push-pull rod, a second nut and a second thrust washer, and second threaded holes are opened at the left and right ends of the upper mold body along the front-to-back direction, the starting end of the second threaded hole is located on the rear side of the upper mold body, and the ending end of the second threaded hole is located in the upper mold body in front of the fine-tuning groove, the outer side surface of the second fine-tuning nut is provided with an external thread adapted to the second threaded hole, and the inner side of the second fine-tuning nut is provided with an internal thread threadedly connected to the second fine-tuning push-pull rod, the front end of the second fine-tuning push-pull rod passes through the fine-tuning groove and is screwed into the upper mold body in front and locked by the second nut and the second thrust washer, the second nut and the second thrust washer are located in the fine-tuning groove, the pitch of the external thread of the second fine-tuning nut is greater than the pitch of the internal thread, and the upper mold body in front of the fine-tuning groove is deformed by twisting the second fine-tuning nut to pull or push the second fine-tuning push-pull rod to adjust the die lip gap.

[0015] The present invention provides a fine-tuning structure on the die head with a fixed lip structure, which has a novel structure and high coating precision, can avoid material leakage on both sides of the flow channel, and can fine-tune the die lip gap. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention from the front perspective; Figure 2 for Figure 1 Exploded diagram; Figure 3 This is a schematic structural diagram of the present invention from a rear bottom perspective; Figure 4 for Figure 3 Exploded diagram; Figure 5 It is a schematic diagram of the internal cross-sectional structure of the present invention; Among them: 1—upper mold body; 11—sealing surface; 111—exhaust groove; 12—forming surface; 13—feed port; 14—flow channel cavity; 15—exhaust hole; 16—fine-tuning groove; 17—second threaded hole; 2—lower mold body; 21—long strip fine-tuning groove; 22—first threaded hole; 3—left stopper; 4—right stopper; 5—mold closing screw; 6—first fine-tuning mechanism; 61—first fine-tuning nut; 62—first fine-tuning push-pull rod; 63—first nut; 64—first thrust washer; 7—second fine-tuning mechanism; 71—second fine-tuning nut; 72—second fine-tuning push-pull rod; 73—second nut; 74—second thrust washer. DETAILED DESCRIPTION

[0017] The present invention will be described in further detail below with reference to the accompanying drawings.

[0018] like Figures 1 to 5As shown, the present invention provides a perovskite coating die head with a fixed lip upper and lower die fine-tuning screw structure, comprising an upper die body 1 and a lower die body 2, wherein the top surface of the lower die body 2 is a plane, and the bottom surface of the upper die body 1 comprises a sealing surface 11 in the rear area and a shaping surface 12 in the front area arranged in a stepped manner, wherein the height of the shaping surface 12 is higher than the height of the sealing surface 11, and the height difference between the two is the flow channel gap, and a feed port 13 vertically penetrating the upper die body 1 is provided at the middle of the rear end of the shaping surface 12, and the left and right sides of the upper die body 1 are provided with a plurality of holes. A left stopper 3 and a right stopper 4 are respectively provided on the left and right sides of the sealing flow channel. The sealing surface 11, the left stopper 3 and the right stopper 4 of the upper mold body 1 are respectively connected and fixed to the top surface of the lower mold body 2 through the mold screws 5. The bottom surface of the front end of the lower mold body 2 is provided with a long strip fine-tuning groove 21 along the width direction. The lower area of ​​the lower mold body 2 is provided with a first fine-tuning mechanism 6. The first fine-tuning mechanism 6 passes through the long strip fine-tuning groove 21 and is connected to the front side wall of the lower mold body 2 to adjust the die lip gap. The number of the first fine-tuning mechanisms 6 is multiple and they are evenly arranged along the width direction.

[0019] In the above scheme, the first fine-tuning mechanism 6 includes a first fine-tuning nut 61, a first fine-tuning push-pull rod 62, a first nut 63 and a first thrust washer 64. A series of first threaded holes 22 are opened in the front-to-back direction at the lower part of the lower mold body 2. The starting end of the first threaded hole 22 is located on the rear side of the lower mold body 2, and the terminal end of the first threaded hole 22 is located in the lower mold body 2 in front of the long strip fine-tuning groove 21. The outer side surface of the first fine-tuning nut 61 is provided with an external thread adapted to the first threaded hole 22, and the inner side of the first fine-tuning nut 61 is provided with an internal thread adapted to the first threaded hole 22. The first fine-tuning push-pull rod 62 is threadedly connected, and the front end of the first fine-tuning push-pull rod 62 passes through the elongated fine-tuning groove 21 and is screwed into the lower mold body 2 in front and is locked by the first nut 63 and the first thrust washer 64. The first nut 63 and the first thrust washer 64 are located in the elongated fine-tuning groove 21. The pitch of the external thread of the first fine-tuning nut 61 is greater than the pitch of the internal thread. By twisting the first fine-tuning nut 61 to pull or push the first fine-tuning push-pull rod 62, the lower mold body 2 in front of the elongated fine-tuning groove 21 is deformed to adjust the die lip gap.

[0020] Specifically, a flow channel cavity 14 is provided between the sealing surface 11 and the shaping surface 12 on the bottom surface of the upper mold body 1. The height of the flow channel cavity 14 is higher than that of the shaping surface 12. The flow channel cavity 14 runs through the left and right sides of the upper mold body 1 along the width direction.

[0021] In addition, the bottom of the feed port 13 is communicated with the middle area of ​​the flow channel cavity 14 .

[0022] Specifically, the flow channel cavity 14 and the sealing surface 11 are transitioned to an arc-shaped concave curved surface, and the flow channel cavity 14 and the shaping surface 12 are transitioned to an inclined plane.

[0023] In addition, an exhaust hole 15 is provided on the top of the upper mold body 1, and the top of the exhaust hole 15 vertically penetrates the top surface of the upper mold body 1. The bottom of the exhaust hole 15 is located on the sealing surface 11 of the upper mold body 1. An exhaust groove 111 is provided on the sealing surface 11. The rear end of the exhaust groove 111 is connected to the exhaust hole 15, and the front end of the exhaust groove 111 is connected to the flow channel cavity 14.

[0024] Specifically, there are three exhaust holes 15 , which are respectively located at the left end, the middle and the right end of the upper mold body 1 .

[0025] Furthermore, fine-tuning grooves 16 are provided in the front top surface areas of the left and right ends of the upper mold body 1, and a second fine-tuning mechanism 7 is provided in the upper mold body 1. The second fine-tuning mechanism 7 passes through the fine-tuning grooves 16 and is connected to the front side wall of the upper mold body 1 to adjust the mold lip gap.

[0026] Specifically, there are multiple second fine-tuning mechanisms 7 and they are evenly arranged along the width direction.

[0027] Specifically, the second fine-tuning mechanism 7 includes a second fine-tuning nut 71, a second fine-tuning push-pull rod 72, a second nut 73 and a second thrust washer 74. The left and right ends of the upper mold body 1 are provided with second threaded holes 17 along the front-back direction. The starting end of the second threaded hole 17 is located on the rear side of the upper mold body 1, and the ending end of the second threaded hole 17 is located inside the upper mold body 1 in front of the fine-tuning groove 16. The outer side of the second fine-tuning nut 71 is provided with an external thread adapted to the second threaded hole 17, and the inner side of the second fine-tuning nut 71 is provided with an internal thread. It is threadedly connected to the second fine-tuning push-pull rod 72. The front end of the second fine-tuning push-pull rod 72 passes through the fine-tuning groove 16 and is screwed into the upper mold body 1 in front and is locked by the second nut 73 and the second thrust washer 74. The second nut 73 and the second thrust washer 74 are located in the fine-tuning groove 16. The pitch of the external thread of the second fine-tuning nut 71 is greater than the pitch of the internal thread. By twisting the second fine-tuning nut 71 to pull or push the second fine-tuning push-pull rod 72, the upper mold body 1 in front of the fine-tuning groove 16 is deformed to adjust the die lip gap.

[0028] The working principle of the present invention is as follows: The molten slurry enters from the feed port 13, and after reaching the middle area of ​​the runner cavity 14, it diffuses to the left and right sides, filling the entire runner cavity 14. The slurry flows forward into the runner gap between the shaping surface 12 and the top surface of the lower mold body 2 (that is, the initial die lip gap), and is squeezed out from the front die lip. During the flow of the slurry, the air inside is discharged upward through the exhaust holes 15 on the top surface of the runner cavity 14. The exhaust holes 15 are distributed in the left, middle and right areas, which can effectively discharge excess air. The left block 3 and the right block 4 seal the left and right sides of the runner to prevent leakage on both sides of the runner. When the size of the die lip gap needs to be adjusted, the first fine-tuning nut 61 in the first fine-tuning mechanism 6 is screwed, and the first fine-tuning push-pull rod 62 is fine-tuned and pulled or pushed through the internal and external differential thread structure of the first fine-tuning nut 61, so that the front end of the first fine-tuning push-pull rod 62 pulls or pushes the side wall in front of the long fine-tuning groove 21 to deform, causing the front end of the lower mold body 2 to produce plastic deformation, thereby adjusting the die lip gap. In addition, the setting of the fine-tuning grooves 16 and the second fine-tuning mechanism 7 at the left and right ends of the upper mold body 1 can adjust the die lip gap at the left and right ends of the upper mold body 1, and can cooperate with the fine-tuning structure at the lower mold body 2 to finally achieve fine-tuning of the die lip gap in the entire width direction of the entire fixed lip die head.

[0029] The above description is only a preferred embodiment of the present invention and does not constitute any form of limitation to the invention. Any simple modification, equivalent change or modification made to the above embodiment based on the technical principle of the present invention still falls within the scope of the technical solution of the present invention.

Claims

1. A perovskite coating die head with a fixed lip upper and lower die fine-tuning screw structure, comprising an upper die body (1) and a lower die body (2), characterized in that: The top surface of the lower mold body (2) is a plane, and the bottom surface of the upper mold body (1) includes a sealing surface (11) located in the rear area and a shaping surface (12) located in the front area arranged in a stepped manner. The height of the shaping surface (12) is higher than the height of the sealing surface (11), and the height difference between the two is the flow channel gap. A feed port (13) vertically penetrating the upper mold body (1) is provided at the middle of the rear end of the shaping surface (12). The left stopper (3) and the right stopper (4) are respectively provided on the left and right sides of the sealing flow channel. The sealing surface (11), the left stopper (3), and the right stopper (4) of the upper mold body (1) are respectively connected and fixed to the top surface of the lower mold body (2) through the mold clamping screws (5); the bottom surface of the front end of the lower mold body (2) is provided with a long strip fine-tuning groove (21) along the width direction; the lower area of ​​the lower mold body (2) is provided with a first fine-tuning mechanism (6); the first fine-tuning mechanism (6) passes through the long strip fine-tuning groove (21) and is connected to the front side wall of the lower mold body (2) to adjust the die lip gap; the number of the first fine-tuning mechanisms (6) is multiple and they are evenly arranged along the width direction.

2. The perovskite coating die head with a fixed lip upper and lower die fine-tuning screw structure according to claim 1, characterized in that: The first fine-tuning mechanism (6) includes a first fine-tuning nut (61), a first fine-tuning push-pull rod (62), a first nut (63) and a first thrust washer (64). A series of first threaded holes (22) are provided on the lower portion of the lower mold body (2) along the front-to-back direction. The starting end of the first threaded hole (22) is located on the rear side of the lower mold body (2), and the ending end of the first threaded hole (22) is located inside the lower mold body (2) in front of the long strip fine-tuning groove (21). The outer side of the first fine-tuning nut (61) is provided with an external thread that matches the first threaded hole (22), and the inner side of the first fine-tuning nut (61) is provided with an internal thread that matches the first threaded hole (22). The fine-tuning push-pull rod (62) is threadedly connected, and the front end of the first fine-tuning push-pull rod (62) passes through the long fine-tuning groove (21) and is screwed into the lower mold body (2) in front and is locked by the first nut (63) and the first thrust washer (64). The first nut (63) and the first thrust washer (64) are located in the long fine-tuning groove (21). The pitch of the outer thread of the first fine-tuning nut (61) is greater than the pitch of the inner thread. By turning the first fine-tuning nut (61) and pulling or pushing the first fine-tuning push-pull rod (62), the lower mold body (2) in front of the long fine-tuning groove (21) is deformed to adjust the die lip gap.

3. The perovskite coating die head with a fixed lip upper and lower die fine-tuning screw structure according to claim 1, characterized in that: A flow channel cavity (14) is provided between the sealing surface (11) and the shaping surface (12) on the bottom surface of the upper mold body (1). The height of the flow channel cavity (14) is higher than the height of the shaping surface (12). The flow channel cavity (14) passes through the left and right sides of the upper mold body (1) along the width direction.

4. The perovskite coating die head with a fixed lip upper and lower die fine-tuning screw structure according to claim 3, characterized in that: The bottom of the feed port (13) is in communication with the middle area of ​​the flow channel cavity (14).

5. The perovskite coating die head with a fixed lip upper and lower die fine-tuning screw structure according to claim 3, characterized in that: There is an arc-shaped concave curved surface transition between the flow channel cavity (14) and the sealing surface (11), and an inclined plane transition between the flow channel cavity (14) and the shaping surface (12).

6. The perovskite coating die head with a fixed lip upper and lower die fine-tuning screw structure according to claim 3, characterized in that: The top of the upper mold body (1) is provided with an exhaust hole (15), the top of the exhaust hole (15) vertically penetrates the top surface of the upper mold body (1), the bottom of the exhaust hole (15) is located on the sealing surface (11) of the upper mold body (1), and the sealing surface (11) is provided with an exhaust groove (111), the rear end of the exhaust groove (111) is connected to the exhaust hole (15), and the front end of the exhaust groove (111) is connected to the flow channel cavity (14).

7. The perovskite coating die head with a fixed lip upper and lower die fine-tuning screw structure according to claim 6, characterized in that: There are three exhaust holes (15), which are respectively located at the left end, the middle and the right end of the upper mold body (1).

8. The perovskite coating die head with a fixed lip upper and lower die fine-tuning screw structure according to claim 1, characterized in that: Fine-tuning grooves (16) are provided on the front top surface areas of the left and right ends of the upper mold body (1), and a second fine-tuning mechanism (7) is provided in the upper mold body (1). The second fine-tuning mechanism (7) passes through the fine-tuning grooves (16) and is connected to the upper side wall of the upper mold body (1) to adjust the die lip gap.

9. The perovskite coating die head with a fixed lip upper and lower die fine-tuning screw structure according to claim 8, characterized in that: The second fine-tuning mechanisms (7) are multiple in number and are evenly arranged along the width direction.

10. The perovskite coating die head with a fixed lip upper and lower die fine-tuning screw structure according to claim 8, characterized in that: The second fine-tuning mechanism (7) includes a second fine-tuning nut (71), a second fine-tuning push-pull rod (72), a second nut (73) and a second thrust washer (74). The left and right ends of the upper mold body (1) are provided with second threaded holes (17) along the front-back direction. The starting end of the second threaded hole (17) is located on the rear side of the upper mold body (1), and the ending end of the second threaded hole (17) is located in the upper mold body (1) in front of the fine-tuning groove (16). The outer side of the second fine-tuning nut (71) is provided with an external thread that matches the second threaded hole (17), and the inner side of the second fine-tuning nut (71) is provided with an internal thread that matches the second threaded hole (17). The second fine-tuning push-pull rod (72) is threadedly connected, and the front end of the second fine-tuning push-pull rod (72) passes through the fine-tuning groove (16) and is screwed into the upper mold body (1) in front and locked by the second nut (73) and the second thrust washer (74). The second nut (73) and the second thrust washer (74) are located in the fine-tuning groove (16). The pitch of the external thread of the second fine-tuning nut (71) is greater than the pitch of the internal thread. By turning the second fine-tuning nut (71) and pulling or pushing the second fine-tuning push-pull rod (72), the upper mold body (1) in front of the fine-tuning groove (16) is deformed to adjust the die lip gap.

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