Perovskite coating die head

Abstract

The invention provides a perovskite coating die head which 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, and an inwards-sunken buffer runner is formed in the inner side surface of the right die body. 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 invention relates to the technical field of die heads, in particular to a perovskite coating die head. Background Art

[0002] Perovskite coating die is used in the production of perovskite photovoltaic solar panels. It can coat perovskite solution on glass substrate or flexible substrate. Due to the low viscosity of perovskite solution, its coating thickness is extremely thin, which places high requirements on the flow channel structure in the die. Summary of the invention

[0003] In view of the above problems, the present invention aims to provide a perovskite coating die head, 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 perovskite coating die head, comprising a left die body, a right die body and a gasket arranged therebetween, the three being connected as a whole by a locking screw, a feed port being arranged on the rear side of the right die body, an inwardly recessed buffer flow channel being arranged on the inner surface of the right die body, the buffer flow channel and the feed port being connected via a feed channel, the gasket comprising a width portion extending laterally at the top and guide portions extending longitudinally at both ends, the width portion being located in the rear area of ​​the buffer flow channel, the guide portions being located in the left and right areas of the buffer flow channel, a slit extrusion channel being formed between the left die body and the right die body in the front area of ​​the buffer flow channel, the raw material enters from the feed port, passes through the feed channel and reaches the buffer flow channel, and is extruded from the slit extrusion channel under the guidance of the gasket.

[0005] Preferably, a deformation groove is provided at the die lip at the front end of the right die body along the width direction, and a row of fine-tuning screws are evenly provided on the outer side of the front end of the right die body along the width direction. The front part of the fine-tuning screw passes through the deformation groove and is connected to the die lip. The deformation of the die lip is adjusted by turning the fine-tuning screw to finally fine-tune the width of the slit extrusion channel at the die lip.

[0006] Preferably, the buffer flow channel is a V-shaped flow channel, the feed channel is located in the middle position of the rear part of the buffer flow channel, the buffer flow channel diffuses in a V shape from the back to the front and from the middle to both sides, the width of the front part of the buffer flow channel along the width direction is adapted to the distance between the left and right guide parts of the gasket, and the front end of the buffer flow channel has a smooth surface transition with the right mold body surface.

[0007] Preferably, the buffer flow channel is a straight flow channel, the feed channel is located in the middle position of the rear part of the buffer flow channel, the width of the buffer flow channel in the width direction from the back to the front is consistent, the width of the front part of the buffer flow channel along the width direction is adapted to the distance between the left and right guide parts of the gasket, and the front end of the buffer flow channel has a smooth surface transition with the right mold body surface.

[0008] Preferably, the buffer flow channel is a multi-channel structure, and the feed channel is located in the middle of the right mold body. The buffer flow channel includes, from back to front, interconnected primary flow channels, secondary flow channels, tertiary flow channels and transverse buffer grooves. The primary flow channel extends to the left and right along the width direction of the right mold body to achieve a one-to-two split. After the middle part of the secondary flow channel is connected with the primary flow channel, it extends to the left and right along the width direction of the right mold body to achieve a one-to-two split. After the middle part of the tertiary flow channel is connected with the secondary flow channel, it extends to the left and right along the width direction of the right mold body to achieve a one-to-two split. The width of the transverse buffer groove along the width direction is adapted to the distance between the left and right guide parts of the gasket, and the rear end of the transverse buffer groove is evenly spaced to connect 8 tertiary flow channels.

[0009] Preferably, the buffer channel includes a first buffer groove located on the inner side of the right mold body and a second buffer groove located on the front side of the first buffer groove. The left, middle and right areas of the rear part of the first buffer groove are all connected to the feed channel. The width of the first buffer groove and the second buffer groove along the width direction is adapted to the distance between the left and right guide parts of the gasket.

[0010] Preferably, the depth and front-to-back width of the second buffer groove are smaller than the depth and front-to-back width of the first buffer groove.

[0011] The present invention can effectively set a unique flow channel corresponding to the lower viscosity characteristics of the perovskite coating to meet the coating requirements, so that the raw materials can be uniformly extruded in different width directions on the die head, thereby ensuring the quality of the coated products. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This is a schematic diagram of the first structure of the present invention; Figure 2 for Figure 1 Exploded diagram of Figure 3 for Figure 1 Schematic diagram of the internal structure; Figure 4 It is a second structural schematic diagram of the present invention; Figure 5 for Figure 4 Exploded diagram of Figure 6 for Figure 4 Schematic diagram of the internal structure; Figure 7 It is a third structural schematic diagram of the present invention; Figure 8 for Figure 7 Exploded diagram of Fig. 9 for Figure 7 Schematic diagram of the internal structure; Fig.10 It is a schematic diagram of the fourth structure of the present invention; Fig.11 for Fig.10 Exploded diagram of Fig.12 for Fig.10 Schematic diagram of the internal structure; Among them: 1—left mold body; 2—right mold body; 21—feed port; 22—buffer channel; 221—primary channel; 222—secondary channel; 223—tertiary channel; 224—transverse buffer groove; 225—first buffer groove; 226—second buffer groove; 23—feed channel; 24—deformation groove; 3—gasket; 31—width part; 32—guide part; 4—locking screw; 5—slit extrusion channel; 6—fine-tuning screw. DETAILED DESCRIPTION

[0013] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0014] like Figures 1 to 12 As shown, the present invention provides a perovskite coating die head, including a left die body 1, a right die body 2 and a gasket 3 arranged therebetween, the above three are connected as a whole by a locking screw 4, a feed port 21 is arranged on the rear side of the right die body 2, and an inwardly recessed buffer flow channel 22 is arranged on the inner surface of the right die body 2, the buffer flow channel 22 and the feed port 21 are connected through a feed channel 23, the gasket 3 includes a width portion 31 extending laterally at the top and guide portions 32 extending longitudinally at both ends, the width portion 31 is located in the rear area of ​​the buffer flow channel 22, the guide portion 32 is located in the left and right areas 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 area of ​​the buffer flow channel 22, the raw material enters from the feed port 21 through the feed channel 23 to reach the buffer flow channel 22, and after filling the entire buffer channel 22, it is evenly extruded from the slit extrusion channel 5 on the front side under the guidance of the gasket 3.

[0015] In the above scheme, a deformation groove 24 is provided at the die lip at the front end of the right die body 2 along the width direction, and a row of fine-tuning screws 6 are evenly provided on the outer side of the front end of the right die body 2 along 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 die lip deformation is adjusted by turning the fine-tuning screw 6 to finally fine-tune the width of the slit extrusion channel 5 at the die lip.

[0016] As a specific flow channel structure, Figures 1 to 3As shown, the buffer channel 22 is a V-shaped channel, the feed channel 23 is located in the middle of the rear part of the buffer channel 22, the buffer channel 22 diffuses in a V-shape from the back to the front and from the middle to the two sides, the width of the front part of the buffer channel 22 along the width direction is adapted to the distance between the left and right guide parts 32 of the gasket 3, and the front end of the buffer channel 22 and the surface of the right mold body 2 are in a smooth surface transition. The raw material enters from the feed port 21 and reaches the rear part of the V-shaped channel of the buffer channel 22 through the feed channel 23, flows forward and diffuses to both sides in a cone shape, fills the entire buffer channel 22, and is evenly extruded from the slit extrusion channel 5 on the front side under the guidance of the gasket 3.

[0017] As a specific flow channel structure, Figures 4 to 6 As shown, the buffer channel 22 is a straight channel, the feed channel 23 is located in the middle of the rear part of the buffer channel 22, the width of the buffer channel 22 from the rear to the front is consistent in the width direction, the width of the front part of the buffer channel 22 along the width direction is adapted to the distance between the left and right guide parts 32 of the gasket 3, and the front end of the buffer channel 22 and the surface of the right mold body 2 are in a smooth transition. The raw material enters from the feed port 21 and passes through the feed channel 23 to the rear part of the straight channel of the buffer channel 22, flows forward and diffuses to both sides, fills the entire buffer channel 22, and is evenly extruded from the front slit extrusion channel 5 under the guidance of the gasket 3.

[0018] As a specific flow channel structure, Figures 7 to 9 As shown, the buffer channel 22 is a multi-channel structure, and the feed channel 23 is located in the middle of the right mold body 2. The buffer channel 22 includes a primary channel 221, a secondary channel 222, a tertiary channel 223 and a transverse buffer groove 224 that are interconnected from back to front. The primary channel 221 extends to the left and right along the width direction of the right mold body 2 to achieve one-to-two divisions. After the middle part of the secondary channel 222 is connected with the primary channel 221, it extends to the left and right along the width direction of the right mold body 2 to achieve one-to-two divisions. After the middle part of the tertiary channel 223 is connected with the secondary channel 222, it extends to the left and right along the width direction of the right mold body 2 to achieve one-to-two divisions. The width of the transverse buffer groove 224 along the width direction is adapted to the distance between the left and right guide portions 32 of the gasket 3, and the rear end of the transverse buffer groove 224 is evenly spaced to connect 8 tertiary channels 223. The raw material enters from the feed port 21, passes through the feed channel 23 and reaches the middle of the primary flow channel 221, flows along the left and right sides and then moves forward to the middle of the secondary flow channel 222, then flows along the left and right sides and then moves forward to the middle of the tertiary flow channel 223, then flows along the left and right sides and then moves forward to the transverse buffer groove 224, and finally the 8 tertiary flow channels 223 are evenly distributed along the width direction and connected with the transverse buffer groove 224, and after filling the entire transverse buffer groove 224, they are evenly extruded from the slit extrusion channel 5 on the front side under the guidance of the gasket 3.

[0019] As a specific flow channel structure, Figures 10 to 12As shown, the buffer channel 22 includes a first buffer groove 225 located on the inner side of the right mold body 2 and a second buffer groove 226 located on the front side of the first buffer groove 225. The left, middle and right areas of the rear of the first buffer groove 225 are all connected with the feed channel 23. The width of the first buffer groove 225 and the second buffer groove 226 along the width direction is adapted to the distance between the left and right guide parts 32 of the gasket 3. The raw material enters from the feed port 21 and reaches the left, middle and right positions of the first buffer groove 225 at the same time through the left, middle and right three feed channels 23. The raw material diffuses to both sides at the same time, fills the entire first buffer groove 225, flows forward to the second buffer groove 226, and after filling the second buffer groove 226, it is uniformly extruded from the front slit extrusion channel 5 under the guidance of the gasket 3.

[0020] Furthermore, the depth and front-to-back width of the second buffer groove 226 are smaller than the depth and front-to-back width of the first buffer groove 225 .

[0021] The above four different flow channel structures can be adapted to the generally low viscosity characteristics of perovskite raw materials with different ratios, ultimately ensuring that perovskite raw materials with different viscosities can be uniformly extruded and coated in the die head.

[0022] The above description is only a preferred embodiment of the present invention and does not limit the invention in any form. Any simple modification, equivalent change or modification made to the above embodiments 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, 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 mold 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), and the gasket (3) comprises a width portion (31) extending transversely at the top and longitudinally extending at both ends. The guide portion (32) extends in a direction extending from the buffer flow channel (22), the width portion (31) is located in the rear area of ​​the buffer flow channel (22), the guide portion (32) is located in the left and right areas of the buffer flow channel (22), and a slit extrusion channel (5) is 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 enters from the feed port (21) through the feed channel (23) to reach the buffer flow channel (22), and is extruded from the slit extrusion channel (5) under the guidance of the gasket (3).

2. A 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.

3. A perovskite coating die head according to claim 1, characterized in that; The buffer flow channel (22) is a V-shaped flow channel, the feed channel (23) is located in the middle of the rear part of the buffer flow channel (22), the buffer flow channel (22) spreads in a V-shape from the back to the front and from the middle to the two sides, the width of the front part of the buffer flow channel (22) along the width direction is matched with the distance between the left and right guide parts (32) of the gasket (3), and the front end of the buffer flow channel (22) and the surface of the right mold body (2) are in a smooth surface transition.

4. A perovskite coating die head according to claim 1, characterized in that; The buffer flow channel (22) is a straight flow channel, the feed channel (23) is located in the middle of the rear part of the buffer flow channel (22), the width of the buffer flow channel (22) from the rear to the front in the width direction is consistent, the width of the front part of the buffer flow channel (22) along the width direction is adapted to the distance between the left and right guide parts (32) of the gasket (3), and the front end of the buffer flow channel (22) and the surface of the right mold body (2) are in a smooth transition.

5. A perovskite coating die head according to claim 1, characterized in that; 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) extending 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 (221) are connected to each other. ) are connected to each other and extend to the left and right along the width direction of the right mold body (2) to realize one-to-two divisions; the middle part of the tertiary flow channel (223) is connected to the secondary flow channel (222) and extends 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 adapted to 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 tertiary flow channels (223).

6. A perovskite coating die head according to claim 1, characterized in that; The buffer channel (22) comprises a first buffer groove (225) located on the inner side 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 areas of the rear of the first buffer groove (225) are all connected to the feed channel (23); the width of the first buffer groove (225) and the second buffer groove (226) along the width direction is adapted to the distance between the left and right guide portions (32) of the gasket (3).

7. A perovskite coating die head according to claim 6, characterized in that; The depth and front-to-back width of the second buffer groove (226) are both smaller than the depth and front-to-back width of the first buffer groove (225).

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