A perovskite coating die with a fixed lip upper and lower die fine adjustment screw structure

Abstract

The application provides a perovskite coating die head with 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 stepped surface and located at a rear area and a shaping surface located at a front area, the height of the shaping surface is higher than that of the sealing surface, a feed port vertically penetrating the upper die body is arranged at the middle part of the rear end of the shaping surface, left and right side walls of the sealing flow channel are respectively provided with left and right side blocks, and the sealing surface, the left side block and the right side block of the upper die body are respectively connected and fixed to the top surface of the lower die body through die screws, a long strip-shaped fine adjustment groove along the width direction is arranged on the bottom surface of the front end of the lower die body, a first fine adjustment mechanism is arranged in the lower die body, the first fine adjustment mechanism is connected to the front side wall of the lower die body after penetrating through the long strip-shaped fine adjustment groove, and the number of the first fine adjustment mechanism is multiple and is uniformly arranged along the width direction. The application can fine adjust the gap between the die lip lips.

Description

Technical Field

[0001] This invention relates to the field of coating dies, and in particular to a perovskite coating die with a fixed lip upper and lower die fine-adjustment screw structure. Background Technology

[0002] The lip gap of a fixed-lip coating die is fixed and cannot be changed by altering the shim thickness. Compared to shim-type coating dies, fixed-lip coating dies have a simpler structure, lower maintenance costs and failure rate, less risk of die leakage, and can withstand higher coating pressures. They also offer high stability in coating production, good coating thickness uniformity, and high coating precision, making them suitable for mature processes and mass production.

[0003] At the same time, the disadvantage of fixed lip is poor flexibility. During trial operation and debugging, if minor defects appear in a part of the product, the fixed lip die head is difficult to make targeted adjustments to the defects. Summary of the Invention

[0004] To address the aforementioned problems, this invention aims to provide a perovskite coating die head with a fixed lip upper and lower die fine-tuning screw structure. Its structure is novel, its coating accuracy is high, and it can finely adjust the lip gap.

[0005] The technical solution of this invention is a perovskite coating die head with a fixed lip upper and lower die fine adjustment screw structure, including an upper die body and a lower die body. The lower die body has a flat top surface. The bottom surface of the upper die body includes a sealing surface in the rear region and a shaping surface in the front region, both arranged in a stepped manner. 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 vertical feed port penetrating the upper die body is provided at the middle of the rear end of the shaping surface. Left and right stops are respectively provided on the left and right sides of the upper die body to seal the flow channel. The sealing surface, left and right stops of the upper die body are connected and fixed to the top surface of the lower die body by die-clamping screws. A long strip-shaped fine adjustment groove is opened on the bottom surface of the front end of the lower die body along the width direction. A first fine adjustment mechanism is provided in the lower region of the lower die body. The first fine adjustment mechanism passes through the long strip-shaped fine adjustment groove and connects to the front sidewall of the lower die body to adjust the die lip gap. Multiple first fine adjustment mechanisms are 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. The lower part of the lower mold body has a series of first threaded holes along the front-rear direction. The starting end of the first threaded hole is located on the rear side 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 of the first fine-tuning nut is provided with an external thread that matches the first threaded hole. The inner side of the first fine-tuning nut is provided with an internal thread that is 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 of it, 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. By turning the first fine-tuning nut to pull or push the first fine-tuning push-pull rod, the lower mold body in front of the elongated fine-tuning groove is deformed, thereby adjusting 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 extends through the left and right sides of the upper mold body along the width direction.

[0008] Preferably, the bottom of the feed inlet is connected to the middle region of the flow channel cavity.

[0009] Preferably, the flow channel cavity and the sealing surface have a circular arc-shaped concave curved transition, and the flow channel cavity and the shaping surface have an inclined plane transition.

[0010] Preferably, the top of the upper mold body is provided with an exhaust hole, 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, the sealing surface is provided with an exhaust groove, 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 vent holes, located at the left, middle and right ends of the upper mold body, respectively.

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

[0013] Preferably, the number of the second fine-tuning rod mechanisms is multiple 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. The upper mold body has second threaded holes at both ends along the front-rear 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 inside the upper mold body in front of the fine-tuning groove. The outer side of the second fine-tuning nut is provided with an external thread that matches the second threaded hole. The inner side of the second fine-tuning nut is provided with an internal thread that is 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. By turning the second fine-tuning nut to pull or push the second fine-tuning push-pull rod, the upper mold body in front of the fine-tuning groove is deformed, thereby adjusting the mold lip gap.

[0015] This invention features a fine-tuning structure on a fixed lip die head. The structure is novel, the coating precision is high, it can prevent material leakage on both sides of the flow channel, and it can fine-tune the gap between the die lip and the flow mouth. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure from the front view of the present invention;

[0017] Figure 2 for Figure 1 Exploded view;

[0018] Figure 3 This is a structural schematic diagram from the rear bottom view of the present invention;

[0019] Figure 4 for Figure 3 Exploded view;

[0020] Figure 5 This is a schematic diagram of the internal cross-sectional structure of the present invention;

[0021] Wherein: 1—Upper mold body; 11—Sealing surface; 111—Ventilation groove; 12—Shaping surface; 13—Feed inlet; 14—Flow channel cavity; 15—Ventilation hole; 16—Fine-adjustment groove; 17—Second threaded hole; 2—Lower mold body; 21—Long strip-shaped fine-adjustment groove; 22—First threaded hole; 3—Left stop block; 4—Right stop block; 5—Mold closing screw; 6—First fine-adjustment mechanism; 61—First fine-adjustment nut; 62—First fine-adjustment push-pull rod; 63—First nut; 64—First thrust washer; 7—Second fine-adjustment mechanism; 71—Second fine-adjustment nut; 72—Second fine-adjustment push-pull rod; 73—Second nut; 74—Second thrust washer. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings.

[0023] like Figures 1 to 5As shown, this invention provides a perovskite coating die head with a fixed lip upper and lower die fine-adjustment screw structure, including an upper die body 1 and a lower die body 2. The top surface of the lower die body 2 is flat. The bottom surface of the upper die body 1 includes a sealing surface 11 located in the rear region and a shaping surface 12 located in the front region, which are 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 vertical feed port 13 penetrating the upper die body 1 is provided at the middle of the rear end of the shaping surface 12. The upper die body 1 has a feed port 13 on the left and right sides. Left and right stops 3 and 4 are respectively provided on the left and right sides of the sealing flow channel. The sealing surface 11, left stop 3 and right stop 4 of the upper mold body 1 are connected and fixed to the top surface of the lower mold body 2 by mold closing screws 5. The bottom surface of the front end of the lower mold body 2 is provided with a long strip-shaped fine adjustment groove 21 along the width direction. The lower part of the lower mold body 2 is provided with a first fine adjustment mechanism 6. The first fine adjustment mechanism 6 passes through the long strip-shaped fine adjustment groove 21 and is connected to the front side wall of the lower mold body 2 to adjust the mold lip gap. There are multiple first fine adjustment mechanisms 6 and they are evenly arranged along the width direction.

[0024] 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. The lower mold body 2 has a series of first threaded holes 22 along the front-rear direction at its lower part. The starting end of the first threaded holes 22 is located on the rear side of the lower mold body 2, and the ending end of the first threaded holes 22 is located inside the lower mold body 2 in front of the elongated fine-tuning groove 21. The outer side 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 that... The first fine-tuning push-pull rod 62 is threaded. 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. It 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 turning 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, thereby adjusting the mold lip gap.

[0025] 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 the height of the shaping surface 12, and the flow channel cavity 14 extends through the left and right sides of the upper mold body 1 along the width direction.

[0026] In addition, the bottom of the feed inlet 13 is connected to the middle region of the flow channel cavity 14.

[0027] Specifically, the flow channel cavity 14 and the sealing surface 11 are connected by an arc-shaped concave curved surface transition, and the flow channel cavity 14 and the shaping surface 12 are connected by an inclined plane transition.

[0028] In addition, 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, and 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.

[0029] Specifically, there are three vent holes 15, located at the left, middle and right ends of the upper mold body 1, respectively.

[0030] Furthermore, a fine-tuning groove 16 is provided on the front top surface area at both ends of the upper mold body 1, and a second fine-tuning mechanism 7 is provided inside the upper mold body 1. The second fine-tuning mechanism 7 passes through the fine-tuning groove 16 and is connected to the front side wall of the upper mold body 1 to adjust the mold lip gap.

[0031] Specifically, there are multiple second fine-tuning mechanisms 7, which are evenly arranged along the width direction.

[0032] 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 upper mold body 1 has second threaded holes 17 at both its left and right ends along the front-rear 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. The second fine-tuning push-pull rod 72 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. It 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 turning 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, thereby adjusting the mold lip gap.

[0033] The working principle of this invention is as follows:

[0034] The molten slurry enters from the inlet 13, reaches the middle area of ​​the flow channel cavity 14, and then spreads to the left and right sides, filling the entire flow channel cavity 14. The slurry flows forward into the flow channel gap (i.e., the initial mold lip gap) between the shaping surface 12 and the top surface of the lower mold body 2, and is squeezed out from the front mold lip. During the flow of the slurry, the air inside is discharged upward through the vent holes 15 on the top surface of the flow channel cavity 14. The vent holes 15 are distributed in three areas: left, middle, and right, which can effectively discharge excess air. The left baffle 3 and the right baffle 4 seal the left and right sides of the flow channel to prevent material leakage on both sides of the flow channel. When it is necessary to adjust the size of the die lip gap, the first fine-tuning nut 61 in the first fine-tuning mechanism 6 is turned. Through the differential thread structure of the inner and outer threads of the first fine-tuning nut 61, the first fine-tuning push-pull rod 62 is pulled or pushed, causing the front end of the first fine-tuning push-pull rod 62 to pull or push the side wall in front of the elongated fine-tuning groove 21 to deform, resulting in plastic deformation of the front end of the lower die body 2, thereby adjusting the die lip gap. In addition, the fine-tuning grooves 16 at the left and right ends of the upper die body 1 and the second fine-tuning mechanism 7 can adjust the die lip gap at the left and right ends of the upper die body 1. This can be combined with the fine-tuning structure at the lower die body 2 to ultimately achieve fine-tuning of the die lip gap throughout the entire width of the fixed die head.

[0035] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention in any way. Any simple modifications, equivalent changes, or alterations made to the above embodiments based on the technical principles of the present invention shall still fall 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-adjustment 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) in the rear region and a shaping surface (12) in the front region, which are 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 vertical feed port (13) penetrating the upper mold body (1) is provided at the middle of the rear end of the shaping surface (12). The left and right sides of the upper mold body (1) are respectively provided with left stop blocks (3) and right stop blocks (4) on the left and right sides of the sealing flow channel. The sealing surface (11), left stop (3), and right stop (4) of the upper mold body (1) are respectively connected and fixed to the top surface of the lower mold body (2) by mold closing screws (5). The bottom surface of the front end of the lower mold body (2) is provided with a long strip-shaped fine adjustment groove (21) along the width direction. The lower part of the lower mold body (2) is provided with a first fine adjustment mechanism (6). The first fine adjustment mechanism (6) passes through the long strip-shaped fine adjustment groove (21) and is connected to the front side wall of the lower mold body (2) to adjust the mold lip gap. There are multiple first fine adjustment mechanisms (6) 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). The lower mold body (2) has a series of first threaded holes (22) in the front-rear direction at its lower part. 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 in the lower mold body (2) in front of the elongated 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 threaded. 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. It 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 turning 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 mold 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) extends 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 inlet (13) is connected to the middle region 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: The flow channel cavity (14) and the sealing surface (11) are connected by an arc-shaped concave curved surface transition, and the flow channel cavity (14) and the shaping surface (12) are connected by an inclined plane transition.

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), 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: The number of vent holes (15) is three, located at the left, middle and right ends 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: The upper mold body (1) has a fine adjustment groove (16) on the front top surface area at both ends. The upper mold body (1) has a second fine adjustment mechanism (7) inside. The second fine adjustment mechanism (7) passes through the fine adjustment groove (16) and is connected to the front side wall of the upper mold body (1) to adjust the mold lip gap.

9. A 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) is multiple and is evenly arranged along the width direction.

10. A 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 upper mold body (1) has second threaded holes (17) at both ends along the front-rear 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 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 threaded. 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. It 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 turning 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 mold lip gap.

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