Perovskite coating die head with double-buffer-groove structure

Abstract

The perovskite coating die head 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, the right die body and the gasket are integrally 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 perovskite coating die with a double buffer groove structure. 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 relatively 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 perovskite coating die with a double buffer groove structure, which has a novel structure and a unique flow channel for perovskite coating to meet the coating requirements.

[0004] The technical solution of the present invention is a perovskite coating die with a double buffer groove structure, including a left die body, a right die body, and a gasket disposed between the two. 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 communicated 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 region of the buffer flow channel, and the guiding portions are located in the left and right regions of the buffer flow channel. A slit extrusion channel is formed between the left die body and the right die body in the front region 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 channel includes a first buffer groove located on the inner surface of the right die body and a second buffer groove located in front of the first buffer groove. The left, middle, and right three regions at the rear of the first buffer groove are all communicated with the feed channel. The widths of the first buffer groove and the second buffer groove in the width direction are adapted to the distance between the left and right two guiding portions of the gasket.

[0005] Preferably, the depth and the front-back width distance of the second buffer groove are both smaller than those of the first buffer groove.

[0006] The present invention can effectively set a unique flow channel corresponding to the low viscosity characteristic of perovskite coating to meet the coating requirements, so that the raw material is evenly extruded in different width directions on the die, ensuring the quality of the coated product. Brief Description of the Drawings

[0007] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is Figure 1 an exploded view of; Figure 3 is Figure 1 an internal structural diagram of; Wherein: 1 - left die body; 2 - right die body; 21 - feed inlet; 22 - buffer flow channel; 225 - first buffer tank; 226 - second buffer tank; 23 - feed channel; 3 - gasket; 31 - width portion; 32 - guiding portion; 4 - clamping die screw; 5 - slit extrusion channel. Detailed implementation mode

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

[0009] As Figures 1 to 3 shown, the present invention provides a perovskite coating die head with a double buffer tank structure, including 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 a clamping die screw 4. A feed inlet 21 is arranged on the rear side surface of the right die body 2, and an inwardly concave buffer flow channel 22 is arranged on the inner surface of the right die body 2. The buffer flow channel 22 and the feed inlet 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 region of the buffer flow channel 22, and the guiding portions 32 are located in the left and right regions of the buffer flow channel 22. A slit extrusion channel 5 is formed between the left die body 1 and the right die body 2 in the front region of the buffer flow channel 22. The raw material enters from the feed inlet 21, reaches the buffer flow channel 22 through the feed channel 23, fills the entire buffer channel 22 and is uniformly extruded from the front slit extrusion channel 5 under the guidance of the gasket 3. The buffer channel 22 includes a first buffer tank 225 on the inner side surface of the right die body 2 and a second buffer tank 226 in front of the first buffer tank 225. The left, middle and right three regions at the rear of the first buffer tank 225 are all communicated with the feed channel 23. The widths of the first buffer tank 225 and the second buffer tank 226 in the width direction are adapted to the distance between the left and right two guiding portions 32 of the gasket 3. The raw material enters from the feed inlet 21 and reaches the left, middle and right three positions of the first buffer tank 225 through the left, middle and right three feed channels 23 at the same time. The raw material diffuses to both sides at the same time, fills the entire first buffer tank 225 and then flows forward into the second buffer tank 226, and after filling the second buffer tank 226, it is uniformly extruded from the front slit extrusion channel 5 under the guidance of the gasket 3.

[0010] Specifically, the depth and the front-back width distance of the second buffer tank 226 are both smaller than those of the first buffer tank 225.

[0011] The above flow 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 uniformly 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 perovskite coating die with a double buffer groove structure, characterized in that; It includes a left mold body (1), a right mold body (2), and a gasket (3) disposed therebetween. The above three are connected into one body by a clamping screw (4). A feed inlet (21) is provided on the rear side surface of the right mold body (2), and an inwardly concave buffer flow channel (22) is provided on the inner surface of the right mold body (2). The buffer flow channel (22) and the feed inlet (21) are communicated through a feed channel (23). The gasket (3) includes a width portion (31) with a top extending horizontally and guiding portions (32) with both ends extending longitudinally. The width portion (31) is located in the rear side area of the buffer flow channel (22), and the guiding portions (32) are located in the left and right side areas of the buffer flow channel (22). A slit extrusion channel (5) is formed between the left mold body (1) and the right mold body (2) in the front side area of the buffer flow channel (22). The raw material enters from the feed inlet (21), reaches the buffer flow channel (22) through the feed channel (23), and is extruded from the slit extrusion channel (5) under the guidance of the gasket (3). The buffer channel (22) includes a first buffer groove (225) located on the inner side surface of the right mold body (2) and a second buffer groove (226) located in front of the first buffer groove (225). The left, middle, and right three regions at the rear of the first buffer groove (225) are all communicated with the feed channel (23). The width of the first buffer groove (225) and the second buffer groove (226) in the width direction is adapted to the distance between the left and right two guiding portions (32) of the gasket (3).

2. The perovskite coating die head with a double buffer groove structure according to claim 1, wherein; The depth and the front and rear width distance of the second buffer groove (226) are both smaller than those of the first buffer groove (225).

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