Perovskite coating die head with multi-runner structure

Abstract

The perovskite coating die head with the multi-runner structure comprises a left die body, a right die body and a gasket arranged between the left die body and the right die body, the left die body, the right die body and the gasket are connected into a whole through a die locking screw, a feeding port is formed in the rear side face of the right die body, an inwards-sunken buffer runner is formed in the inner side surface of the right die body, and the left die body and the right die body are connected through a die locking screw. The gasket comprises a breadth part with the top extending transversely and guide parts with the two ends extending longitudinally, the breadth part is located in the rear side area of the buffering runner, and the guide parts are located in the left side area and the right side area of the buffering runner; and a slit extrusion channel is formed between the left die body and the right die body in the front side area of the buffer runner, and raw materials enter from the feeding port, reach the buffer runner through the feeding channel and are extruded from the slit extrusion channel under the guidance of the gasket. A unique runner can be effectively arranged for perovskite coating, the coating requirement is met, raw materials are evenly extruded on the die head in different breadth directions, and the quality of coated products is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of dies, and more particularly to a multi-channel structure perovskite coating die. Background Art

[0002] The perovskite coating die is applied to the production of perovskite photovoltaic solar panels, and can coat perovskite solution on a glass substrate or a flexible substrate. Since the viscosity of the perovskite solution is low and its coating thickness is extremely thin, this places high requirements on the flow channel structure inside the die. Summary of the Invention

[0003] In view of the above problems, the present invention aims to provide a multi-channel structure perovskite coating die, which has a novel structure and is provided with a unique flow channel for perovskite coating to meet the coating requirements.

[0004] The technical solution of the present invention is a multi-channel structure perovskite coating die, which includes a left die body, a right die body and a gasket disposed therebetween. The above three are connected into one body by clamping screws. An inlet is provided on the rear side surface of the right die body, and an inwardly recessed buffer flow channel is provided on the inner surface of the right die body. The buffer flow channel and the inlet are connected through a feed channel. The gasket includes a width portion with a top extending horizontally and guiding portions with both ends extending longitudinally. The width portion is located in the rear side area of the buffer flow channel, and the guiding portions are located in the left and right side areas of the buffer flow channel. A slit extrusion channel is formed between the left die body and the right die body in the front side area of the buffer flow channel. The raw material enters from the inlet, reaches the buffer flow channel through the feed channel, and is extruded from the slit extrusion channel under the guidance of the gasket. The buffer flow channel is a multi-channel structure, and the feed channel is located in the middle of the right die body. The buffer flow channel includes a first-level flow channel, a second-level flow channel, a third-level flow channel and a horizontal buffer groove that are connected to each other from back to front. The first-level flow channel extends respectively to the left and right along the width direction of the right die body to achieve one split into two. After the middle of the second-level flow channel is connected to the first-level flow channel, it extends respectively to the left and right along the width direction of the right die body to achieve one split into two. After the middle of the third-level flow channel is connected to the second-level flow channel, it extends respectively to the left and right along the width direction of the right die body to achieve one split into two. The width of the horizontal buffer groove along the width direction is adapted to the distance between the left and right guiding portions of the gasket, and the rear end of the horizontal buffer groove is uniformly spaced and connected to 8 third-level flow channels.

[0005] Preferably, a deformation groove is provided through the right die body at the die lip at the front end of the right die body along the width direction. A row of fine adjustment screws is uniformly provided on the outer side surface of the front end of the right die body along the width direction. The front part of the fine adjustment screw passes through the deformation groove and is connected to the die lip. By turning the fine adjustment screw, the deformation of the die lip is adjusted to finally finely adjust the width of the slit extrusion channel at the die lip.

[0006] The present invention can effectively set a unique flow channel corresponding to the lower viscosity characteristics of perovskite coating to meet the coating requirements, enabling the raw materials to be evenly extruded in different width directions on the die head and ensuring the quality of the coated products. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is Figure 1 exploded view of Figure 3 is Figure 1 schematic diagram of the internal structure of Wherein: 1 - left die body; 2 - right die body; 21 - feed inlet; 221 - primary flow channel; 222 - secondary flow channel; 223 - tertiary flow channel; 224 - transverse buffer groove; 23 - feed channel; 24 - deformation groove; 3 - gasket; 31 - width portion; 32 - guiding portion; 4 - clamping screw; 5 - slit extrusion channel; 6 - fine adjustment screw. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0008] The present invention will be further described in detail below with reference to the accompanying drawings.

[0009] Such as Figures 1 to 3As shown in the figure, the present invention provides a multi-channel structure perovskite coating die head, which includes a left die body 1, a right die body 2 and a gasket 3 arranged between the two. The above three are connected into one body by clamping screws 4. A feed port 21 is arranged on the rear side surface of the right die body 2, and an inwardly concave buffer channel 22 is arranged on the inner surface of the right die body 2. The buffer channel 22 and the feed port 21 are communicated through a feed channel 23. The gasket 3 includes a width portion 31 with a horizontally extending top and guiding portions 32 with longitudinally extending ends at both ends. The width portion 31 is located in the rear side area of the buffer channel 22, and the guiding portions 32 are located in the left and right side areas of the buffer channel 22. A slit extrusion channel 5 is formed between the left die body 1 and the right die body 2 in the front side area of the buffer channel 22. The raw material enters from the feed port 21, reaches the buffer channel 22 through the feed channel 23, fills the entire buffer channel 22 and is evenly extruded from the front slit extrusion channel 5 under the guidance of the gasket 3; the buffer channel 22 is a multi-channel structure, and the feed channel 23 is located in the middle of the right die body 2. The buffer channel 22 includes a first-stage channel 221, a second-stage channel 222, a third-stage channel 223 and a horizontal buffer groove 224 that are connected to each other from back to front. The first-stage channel 221 extends respectively to the left and right along the width direction of the right die body 2 to achieve one into two. After the middle of the second-stage channel 222 is connected to the first-stage channel 221, it extends respectively to the left and right along the width direction of the right die body 2 to achieve one into two. After the middle of the third-stage channel 223 is connected to the second-stage channel 222, it extends respectively to the left and right along the width direction of the right die body 2 to achieve one into two. The width of the horizontal buffer groove 224 along the width direction is adapted to the distance between the left and right two guiding portions 32 of the gasket 3. The rear end of the horizontal buffer groove 224 is evenly spaced and communicated with 8 third-stage channels 223. The raw material enters from the feed port 21, reaches the middle of the first-stage channel 221 through the feed channel 23, flows forward along the left and right sides, then reaches the middle of the second-stage channel 222, then flows forward along the left and right sides, then reaches the middle of the third-stage channel 223, then flows forward along the left and right sides and reaches the horizontal buffer groove 224. Finally, 8 third-stage channels 223 are evenly distributed along the width direction and communicated with the horizontal buffer groove 224. After filling the entire horizontal buffer groove 224, it is evenly extruded from the front slit extrusion channel 5 under the guidance of the gasket 3.

[0010] In the above solution, a deformation groove 24 is arranged through the right die body 2 along the width direction at the die lip at the front end of the right die body 2. A row of fine adjustment screws 6 is evenly arranged on the outer side surface of the front end of the right die body 2 along the width direction. The front part of the fine adjustment screw 6 passes through the deformation groove 24 and is connected to the die lip. By turning the fine adjustment screw 6, the deformation of the die lip is adjusted to finally fine-tune the width of the slit extrusion channel 5 at the die lip.

[0011] The above channel structure can be applicable to the characteristics of generally low viscosities of perovskite raw materials with different ratios, and finally ensure that perovskite raw materials with different viscosities can be evenly extruded and coated in the die head.

[0012] The above are only the preferred embodiments of the present invention, and do not impose any formal limitations on the invention. Any simple modifications, equivalent changes or decorations made to the above embodiments based on the technical principles of the present invention still fall within the scope of the technical solutions of the present invention.

Claims

1. A multi-channel structure perovskite coating die head, characterized in that; The invention comprises a left mold body (1), a right mold body (2) and a gasket (3) arranged therebetween, wherein the three are connected as a whole by a locking screw (4), the rear side of the right mold body (2) is provided with a feed port (21), the inner surface of the right mold body (2) is provided with an inwardly recessed buffer flow channel (22), the buffer flow channel (22) and the feed port (21) are connected via a feed channel (23), the gasket (3) comprises a width portion (31) extending transversely at the top and two ends of the gasket (3) extending transversely at the bottom. A guide portion (32) extending longitudinally, the width portion (31) being located in the rear area of ​​the buffer flow channel (22), the guide portion (32) being located in the left and right areas of the buffer flow channel (22), and a slit extrusion channel (5) being formed between the left mold body (1) and the right mold body (2) in the front area of ​​the buffer flow channel (22), the raw material entering from the feed port (21) through the feed channel (23) to reach the buffer flow channel (22), and being extruded from the slit channel (5) under the guidance of the gasket (3) extrusion; the buffer flow channel (22) is a multi-flow channel structure, the feed channel (23) is located in the middle of the right mold body (2), the buffer flow channel (22) includes, from back to front, a primary flow channel (221), a secondary flow channel (222), a tertiary flow channel (223) and a transverse buffer groove (224) that are interconnected, the primary flow channel (221) extends to the left and right along the width direction of the right mold body (2) to achieve a one-to-two split, the middle of the secondary flow channel (222) and the primary flow channel (22 1) After being connected, the third-level flow channel (223) is extended to the left and right along the width direction of the right mold body (2) to realize one-to-two divisions; after being connected with the second-level flow channel (222), the middle part of the third-level flow channel (223) is extended to the left and right along the width direction of the right mold body (2) to realize one-to-two divisions; the width of the transverse buffer groove (224) along the width direction is matched with the distance between the left and right guide parts (32) of the gasket (3); and the rear end of the transverse buffer groove (224) is evenly spaced to connect with eight third-level flow channels (223).

2. A multi-channel structure perovskite coating die head according to claim 1, characterized in that; A deformation groove (24) is provided at the die lip at the front end of the right die body (2) through the die lip in the width direction, and a row of fine-tuning screws (6) are evenly provided on the outer side surface of the front end of the right die body (2) in the width direction. The front part of the fine-tuning screw (6) passes through the deformation groove (24) and is connected to the die lip. The deformation of the die lip is adjusted by turning the fine-tuning screw (6), and the width of the slit extrusion channel (5) at the die lip is finally fine-tuned.

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