Perovskite coating die with fixed lip and lip fine adjustment screw structure

Abstract

This invention provides a fixed-lip perovskite coating die head with a lip fine-tuning screw structure, comprising an upper die body and a lower die body. The top surface of the lower die body is flat. The bottom surface of the upper die body includes a sealing surface and a shaping section arranged in a stepped manner. The top surface of the shaping section is higher than the top surface of the sealing surface, and the height difference between the two is the flow channel gap. A flow channel cavity is provided between the shaping section and the sealing surface. The top surface of the flow channel cavity is higher than the top surface of the shaping section. A feed channel extending longitudinally through the rear side of the upper die body is provided in the middle of the top surface of the flow channel cavity. Left and right stops are respectively provided on the left and right outer sides of the upper die body, representing the left and right sides of the sealing flow channel. The sealing surface, left and right stops of the upper die body are respectively connected and fixed to the top surface of the lower die body by locking screws. The upper die body is provided with a fine-tuning groove. A fine-tuning mechanism is inclined through the fine-tuning groove from the top surface of the upper die body and connected to the upper die body. This invention provides a fine-tuning mechanism at the front end of the upper die body of the fixed-lip die head to fine-tune the die lip gap.

Description

Technical Field

[0001] This invention relates to the field of coating die technology, and in particular to a perovskite coating die with a fixed lip and a lip 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] However, the disadvantage of a fixed lip is its poor flexibility. During trial runs and debugging, if minor defects appear in a part of the product, the fixed lip die head cannot make targeted adjustments to address the defects. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide a fixed lip perovskite coating die head with a lip fine-tuning screw structure, wherein a fine-tuning mechanism is provided at the front end of the upper die body to finely adjust the die lip gap of the die head.

[0005] The technical solution of this invention is a fixed lip perovskite coating die head with a lip fine-adjustment screw structure, comprising an upper die body and a lower die body. The lower die body has a flat top surface, and the upper die body has a stepped bottom surface comprising a sealing surface in the rear region and a shaping section in the front region. The top surface of the shaping section is higher than the top surface of the sealing surface, and the height difference between them is the flow channel gap. A flow channel cavity is provided between the shaping section and the sealing surface, and the top surface of the flow channel cavity is higher than the top surface of the shaping section. The flow channel cavity laterally penetrates the upper die body. On the left and right end faces, a longitudinal feeding channel penetrating the rear side of the upper mold body is provided on the top surface of the middle part of the flow channel cavity. Left and right stops are respectively provided on the left and right outer sides of the upper mold body to seal the left and right sides of the flow channel. The sealing surface, left and right stops of the upper mold body are respectively connected and fixed to the top surface of the lower mold body by locking screws. A fine adjustment groove is provided on the front end face of the upper mold body near the upper mold lip, penetrating the left and right sides along the width direction. The fine adjustment mechanism is inclined through the fine adjustment groove from the top surface of the upper mold body and connected to the upper mold body. The opening gap at the upper mold lip is adjusted by the fine adjustment mechanism.

[0006] Preferably, the fine-tuning mechanism includes a series of fine-tuning nuts and fine-tuning bolts evenly distributed along the width direction. A series of threaded holes are evenly distributed along the width direction at the front of the upper mold body. The starting end of the threaded hole is located on the top surface of the upper mold body. The lower part of the threaded hole is inclined forward, passes through the fine-tuning groove, and then penetrates into the upper mold body. The outer side of the fine-tuning nut is provided with an external thread and is threadedly connected to the threaded hole. The inner side of the fine-tuning nut is provided with an internal thread. The pitch of the external thread of the fine-tuning nut is greater than the pitch of the internal thread. The top surface of the fine-tuning nut is provided with an internal hexagonal groove. The upper part of the fine-tuning bolt is provided with an external thread and is threadedly connected to the internal threaded hole of the fine-tuning nut. The lower end of the fine-tuning bolt passes through the fine-tuning groove and is threadedly connected to the upper mold body. Tightening the fine-tuning nut pushes or pulls the fine-tuning bolt by the difference in the inner and outer pitches to fine-tune the mold lip clearance.

[0007] Preferably, the rear side of the flow channel cavity has an inclined forward structure extending from the middle to both sides along the width direction, and the shapes of the left and right sides are symmetrical about the middle.

[0008] Preferably, an exhaust hole is provided on the rear side of the middle part of the flow channel cavity, and the rear end of the exhaust hole penetrates the top surface or rear side of the upper mold body.

[0009] Preferably, the flow channel cavity and the shaping section have a circular arc-shaped curved surface transition.

[0010] The present invention provides a fine-tuning mechanism at the front end of the upper mold body of the fixed lip mold head to finely adjust the mold lip gap of the mold head. The structure is stable and reliable, and the adjustment accuracy is high. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of the present invention;

[0012] Figure 2 for Figure 1 Exploded view;

[0013] Figure 3 This is a structural schematic diagram from another perspective of the present invention;

[0014] Figure 4 for Figure 3 Exploded view;

[0015] Figure 5 This is a schematic diagram of the internal cross-sectional structure of the present invention in use.

[0016] Wherein: 1—Upper mold body; 11—Sealing surface; 12—Shaping section; 13—Flow channel cavity; 14—Feed channel; 15—Upper mold lip; 16—Fine adjustment groove; 17—Threaded hole; 18—Vent hole; 2—Lower mold body; 3—Left stop block; 4—Right stop block; 5—Mold locking screw; 6—Fine adjustment mechanism; 61—Fine adjustment nut; 62—Fine adjustment bolt. Detailed Implementation

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

[0018] like Figures 1 to 5 As shown, this invention provides a fixed-lip perovskite coating die head with a lip fine-tuning 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 in the rear region and a shaping section 12 in the front region, which are arranged in a stepped manner. The top surface of the shaping section 12 is higher than the top surface of the sealing surface 11, and the height difference between the two is the flow channel gap. A flow channel cavity 13 is provided between the shaping section 12 and the sealing surface 11. The top surface of the flow channel cavity 13 is higher than the top surface of the shaping section 12, and the flow channel cavity 13 penetrates laterally through the left and right end faces of the upper die body 1. The top surface of the middle part of the flow channel cavity 13 is provided with a longitudinal feeding channel 14 that penetrates the rear side of the upper mold body 1. The left and right sides of the upper mold body 1 are respectively provided with left stop blocks 3 and right stop blocks 4 to seal the left and right sides of the flow channel. The sealing surface 11, left stop block 3 and right stop block 4 of the upper mold body 1 are respectively connected and fixed to the top surface of the lower mold body 2 by locking screws 5. The front end face of the upper mold body 1 is provided with a fine adjustment groove 16 that penetrates the left and right sides along the width direction near the upper mold lip 15. The fine adjustment mechanism 6 is inclined through the fine adjustment groove 16 from the top surface of the upper mold body 1 and connected to the inside of the upper mold body 1. The opening gap at the upper mold lip 15 is adjusted by the fine adjustment mechanism 6.

[0019] In the above scheme, the fine-tuning mechanism 6 includes a series of fine-tuning nuts 61 and fine-tuning bolts 62 evenly distributed along the width direction. A series of threaded holes 17 are evenly distributed along the width direction at the front of the upper mold body 1. The starting end of the threaded hole 17 is located on the top surface of the upper mold body 1. The lower part of the threaded hole 17 is inclined forward and passes through the fine-tuning groove 16 and then penetrates into the upper mold body 1. The outer side of the fine-tuning nut 61 is provided with external threads and is threadedly connected to the threaded hole 17. The inner side of the fine-tuning nut 61 is provided with internal threads. The pitch of the external thread of the fine-tuning nut 61 is greater than the pitch of the internal thread. The top surface of the fine-tuning nut 61 is provided with an internal hexagonal groove. The upper part of the fine-tuning bolt 62 is provided with external threads and is threadedly connected to the internal threaded hole of the fine-tuning nut 61. The lower end of the fine-tuning bolt 62 passes through the fine-tuning groove 16 and is threadedly connected to the upper mold body 1. Tightening the fine-tuning nut 61 pushes or pulls the fine-tuning bolt 62 by the difference between the inner and outer pitches to fine-tune the mold lip clearance.

[0020] Specifically, the rear side of the flow channel cavity 13 has an inclined forward structure extending from the middle to both sides along the width direction, and the shapes of the left and right sides are symmetrical about the middle.

[0021] In addition, an exhaust hole 18 is provided on the rear side of the middle part of the flow channel cavity 13, and the rear end of the exhaust hole 18 penetrates the top surface or the rear side of the upper mold body 1.

[0022] Furthermore, the flow channel cavity 13 and the shaping section 12 form a circular arc-shaped curved surface transition.

[0023] The working principle of this invention is as follows:

[0024] When in use, such as Figure 5 As shown, with the mold lip facing downwards, the molten slurry enters from the feed channel 14, reaches the middle area of ​​the runner cavity 13, and then spreads to the left and right sides, filling the entire runner cavity 13 and flowing forward. It enters the runner gap between the shaping section 12 and the top surface of the lower mold body 2, and is squeezed out from the mold lip opening at the front. During the flow of the slurry, the air inside is discharged through the vent hole 18 at the top of the runner cavity 13. The left stop block 3 and the right stop block 4 seal the left and right sides of the runner to prevent material leakage from both sides. When it is necessary to adjust the size of the mold lip opening gap, the fine-tuning nut 61 is turned, and the fine-tuning bolt 62 is pushed forward or pulled backward by the differential thread. The front end of the fine-tuning bolt 62 pushes or pulls the side wall in front of the fine-tuning groove 16 to deform, causing plastic deformation at the front end of the upper mold body 1, thereby fine-tuning the size of the mold lip opening gap.

[0025] 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 fixed-lip perovskite coating die head with a lip 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. The bottom surface of the upper mold body (1) includes a sealing surface (11) in the rear region and a shaping section (12) in the front region, which are arranged in a stepped manner. The top surface of the shaping section (12) is higher than the top surface of the sealing surface (11), and the height difference between the two is the flow channel gap. A flow channel cavity (13) is provided between the shaping section (12) and the sealing surface (11). The top surface of the flow channel cavity (13) is higher than the top surface of the shaping section (12). The flow channel cavity (13) penetrates the left and right end faces of the upper mold body (1) laterally. The top surface of the middle part of the flow channel cavity (13) is provided with an inlet that penetrates the rear side of the upper mold body (1) longitudinally. Material channel (14), the left and right sides of the upper mold body (1) are respectively provided with left stop (3) and right stop (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 locking screws (5). The front end face of the upper mold body (1) is provided with a fine adjustment groove (16) that runs through the left and right sides along the width direction near the upper mold lip (15). The fine adjustment mechanism (6) is inclined through the fine adjustment groove (16) from the top surface of the upper mold body (1) and connected to the upper mold body (1). The opening gap at the upper mold lip (15) is adjusted by the fine adjustment mechanism (6).

2. The perovskite coating die head with a fixed lip and a lip fine-adjustment screw structure according to claim 1, characterized in that: The fine-tuning mechanism (6) includes a series of fine-tuning nuts (61) and fine-tuning bolts (62) evenly distributed along the width direction. A series of threaded holes (17) are evenly distributed along the width direction at the front of the upper mold body (1). The starting end of the threaded hole (17) is located on the top surface of the upper mold body (1). The lower part of the threaded hole (17) is inclined forward and passes through the fine-tuning groove (16) and then penetrates into the upper mold body (1). The outer side of the fine-tuning nut (61) is provided with external threads and is threadedly connected to the threaded hole (17). (61) The inner side is provided with an internal thread. The pitch of the external thread of the fine-adjusting nut (61) is greater than the pitch of the internal thread. The top surface of the fine-adjusting nut (61) is provided with an internal hexagonal groove. The upper part of the fine-adjusting bolt (62) is provided with an external thread and is threadedly connected to the internal thread hole of the fine-adjusting nut (61). The lower end of the fine-adjusting bolt (62) passes through the fine-adjusting groove (16) and is threadedly connected to the upper mold body (1). Tightening the fine-adjusting nut (61) pushes or pulls the fine-adjusting bolt (62) by the difference between the internal and external pitches to fine-tune the mold lip gap.

3. The perovskite coating die head with a fixed lip and a lip fine-adjustment screw structure according to claim 1, characterized in that: The rear side of the flow channel cavity (13) extends forward at an angle from the middle to both sides along the width direction, and the shapes of the left and right sides are symmetrical about the middle.

4. The perovskite coating die head with a fixed lip and a lip fine-adjustment screw structure according to claim 1, characterized in that: The flow channel cavity (13) has an exhaust hole (18) on the rear side of the middle part, and the rear end of the exhaust hole (18) penetrates the top surface or the rear side of the upper mold body (1).

5. A fixed-lip perovskite coating die head with a lip fine-adjustment screw structure according to claim 1, characterized in that: The flow channel cavity (13) and the shaping section (12) are connected by a circular arc-shaped curved surface transition.

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