Slit coating machine tool bit overflow liquid treatment device and slit coating machine

Abstract

The invention relates to the technical field of coating machines, in particular to a slit coating machine tool bit overflow treatment device and a slit coating machine. The tool bit overflow processing device comprises a second servo motor, a third ball screw, a dust-free cloth rolling machine installed on the third ball screw through a first sliding block, a cloth rolling machine driving shaft arranged on the dust-free cloth rolling machine in a winding mode and dust-free cloth arranged on a cloth rolling machine driven shaft, and the second servo motor is installed at one end of the third ball screw. The control device is used for controlling the moving speed of the dust-free cloth rolling machine through the third ball screw and the first sliding block, and the dust-free cloth rolling machine controls the cloth discharging speed of dust-free cloth through cooperation of the cloth rolling machine driving shaft and the cloth rolling machine driven shaft. According to the invention, the slit coating machine can automatically process the overflow liquid in a closed space (in a vacuum or nitrogen atmosphere), so that the perovskite precursor solution can be uniformly coated on the electron transport layer and the hole transport layer.

Description

Technical Field

[0001] The invention relates to the technical field of coating machines, in particular to a slit coating machine cutter head overflow processing device and a slit coating machine. Background Art

[0002] As the third generation of solar cells, perovskite photovoltaic cells have the advantages of narrow band gap, high photoelectric conversion efficiency, low cost and flexible processing. In recent years, they have developed rapidly, and their efficiency has been approaching the theoretical limit, and they are close to the level of commercial application. At present, one of the core technologies for preparing perovskite photovoltaic cells is the preparation of the perovskite layer. As the core layer that absorbs energy from photons and generates excitation current, the quality of the perovskite layer greatly determines the efficiency of the perovskite photovoltaic cell. There are three methods for preparing the perovskite layer in large-area perovskite photovoltaic cells, namely wet method, semi-dry method and full dry method. Among them, the equipment for preparing the perovskite layer by wet method is a slit coater, which can evenly coat the perovskite precursor solution on the electron transport layer or the hole transport layer, and form a high-quality perovskite layer through subsequent treatment.

[0003] The solute solvent in the perovskite precursor solution has a high hygroscopicity, so it is easily affected by the humidity in the air during the coating process. When the humidity of the air is high, the perovskite precursor solution will become significantly viscous, which will greatly increase the difficulty of coating a high-uniformity film; at the same time, when the perovskite precursor solution absorbs more moisture in the air, the quality of the final perovskite film will be greatly reduced, and ultimately the photoelectric conversion efficiency of the perovskite photovoltaic cell will be greatly reduced. In addition to the influence of moisture in the air, other gases will also undergo complex chemical reactions with the substances in the perovskite precursor solution, which will also greatly reduce the photoelectric conversion efficiency of the perovskite photovoltaic cell. In order to reduce the influence of air on the preparation of the perovskite layer, many models that improve the slit coater have been proposed on the market, so that it can coat the perovskite precursor solution in a vacuum or nitrogen atmosphere. However, when the slit coater is coating the perovskite precursor solution, the blade head needs to be lubricated. The blade head is filled with the perovskite precursor solution. During the lubrication process, the blade head will overflow due to uneven pre-injection. The overflow on the blade head will greatly affect the uniformity of the perovskite precursor solution film, thereby affecting the uniformity of the perovskite film, and ultimately have a negative impact on the photoelectric conversion efficiency. In order to maintain a vacuum state or nitrogen atmosphere, the coating process needs to be carried out in a closed space, and it is difficult to manually handle the overflow on the blade head in a closed environment. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention proposes a slit coater blade overflow processing device and a slit coater, which can enable the slit coater to automatically process the overflow in a closed space (vacuum or nitrogen atmosphere), thereby allowing the perovskite precursor solution to be evenly coated on the electron transport layer and the hole transport layer.

[0005] In order to achieve the above object, the technical solution specifically adopted by the present invention is as follows:

[0006] A device for processing overflow from a slit coating machine blade comprises a No. 2 servo motor, a No. 3 ball screw, a dust-free cloth winder mounted on the No. 3 ball screw via a No. 1 slider, and a dust-free cloth wound on a cloth winder driving shaft and a cloth winder driven shaft of the dust-free cloth winder. The No. 2 servo motor is mounted on one end of the No. 3 ball screw and is used to control the moving speed of the dust-free cloth winder via the No. 3 ball screw and the No. 1 slider. The dust-free cloth winder controls the cloth delivery speed of the dust-free cloth via the cooperation of the cloth winder driving shaft and the cloth winder driven shaft.

[0007] The present invention also provides a slit coater, including a coater body and the slit coater blade overflow treatment device, the coater body including an operating table, a main base slidably mounted above the operating table through a No. 2 ball screw and a No. 3 slider, and a blade lifting module and a blade mounted above the operating table through two columns, the operating table is provided with a group of through slots for the slit coater blade overflow treatment device and the main base to move, the slit coater blade overflow treatment device is mounted on the No. 2 ball screw through the No. 2 slider. When the ball screw and the servo motor control the blade overflow automatic treatment module to move to the bottom of the blade, the blade lifting module controls the blade to move to the corresponding position on the dust-free cloth, and an interaction force is generated between the blade and the dust-free cloth.

[0008] Furthermore, a certain distance is maintained between the second slider and the third slider, so that subsequent processes can be carried out quickly after the overflow of the cutter head is processed.

[0009] Furthermore, the slit coater blade overflow processing device is installed on the No. 2 base, the No. 2 slider is connected to the No. 2 base through a support column, and the No. 3 slider is connected to the main base through a No. 4 support frame; the support column and the No. 4 support frame are both slidably arranged in a group of through grooves; specifically, the upper end of the support column is connected to the No. 2 base, and the lower end is connected to the No. 2 slider through the through groove; the upper end of the No. 4 support frame is connected to the main base, and the lower end is connected to the No. 3 slider.

[0010] The present invention has the following characteristics and beneficial effects:

[0011] The automatic overflow treatment device for the cutter head of the present invention can enable the slit coater to automatically handle overflow in a closed space (vacuum or nitrogen atmosphere), and can evenly coat the perovskite precursor solution on the electron transport layer and the hole transport layer. At the same time, the moving speed of the dust-free cloth is controlled by the servo motor and the ball screw, the cloth output speed of the dust-free cloth is controlled by the active shaft and the driven shaft of the cloth winder, and the interaction force between the cutter head and the dust-free cloth is controlled by the servo motor and the ball screw, which can simulate manual wiping of overflow on the cutter head. The entire production process is made more automated, while reducing the contact between people and the perovskite precursor solution, greatly increasing safety.

[0012] The automatic overflow treatment device for the cutter head of the present invention can not only treat the overflow of the cutter head before coating, but also automatically treat the cleaning liquid on the cutter head during the cleaning of the cutter head, thereby reducing the time required for manual supervision and releasing labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0014] Figure 1 This is a schematic structural diagram of a device for processing overflow from a cutter head of a slit coater according to an embodiment of the present invention;

[0015] Figure 2 A three-dimensional diagram of a slit coating machine according to an embodiment of the present invention;

[0016] Figure 3 A side view of a slit coating machine according to an embodiment of the present invention;

[0017] Figure 4 A three-dimensional diagram of a slit coating machine according to an embodiment of the present invention;

[0018] Figure 5 This is a schematic diagram of a state of a slit coater in an embodiment of the present invention when it is located at a pre-preparation position;

[0019] Figure 6 It is a three-dimensional diagram of a dust-free cloth rolling machine in an embodiment of the present invention.

[0020] Figure 7 is a cross-sectional view of a dust-free cloth rolling machine in an embodiment of the present invention;

[0021] In the figure: servo motor No. 1 1, ball screw No. 1 2, cutter head 3, main base 4, waste liquid tank 5, column 6, dust-free cloth 7, dust-free cloth winding machine 8, base No. 1 9, servo motor No. 2 10, slider No. 1 11, base No. 2 12, support platform 13, ball screw No. 2 14, ball screw No. 3 15, support frame No. 1 16, support frame No. 2 17, air knife 18, support frame No. 3 19, servo motor No. 3 20, cloth winding machine driving shaft 21, cloth winding machine driven shaft 22, support frame No. 4 23, slider No. 2 24, slider No. 3 25. DETAILED DESCRIPTION

[0022] The present invention is described in detail below in conjunction with specific embodiments. The following embodiments will help those skilled in the art to further understand the present invention, but are not intended to limit the present invention in any form. It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0023] Example 1

[0024] like Figure 1 As shown, a slit coater blade overflow processing device includes a No. 2 servo motor 10, a No. 3 ball screw 15, a dust-free cloth winder 8 installed on the No. 3 ball screw 15 through a No. 1 slider 11, and a dust-free cloth 7 wound on a cloth winder active shaft 21 and a cloth winder driven shaft 22 of the dust-free cloth winder 8. The No. 2 servo motor 10 is installed at one end of the No. 3 ball screw 15, and is used to control the moving speed of the dust-free cloth winder 8 through the No. 3 ball screw 15 and the No. 1 slider 11. The dust-free cloth winder 8 controls the cloth delivery speed of the dust-free cloth 7 through the cloth winder active shaft 21 and the cloth winder driven shaft 22. In this embodiment, the dust-free cloth rolling machine 8 adopts a fixing method of pressing the end cover, and the cloth rolling machine driving shaft 21 and the cloth rolling machine driven shaft 22 are respectively connected to the sheet metal main structure through the driving wheel and the driven wheel, and the driving wheel and the driven wheel are fixed to the sheet metal main structure through the end cover and bolts, so as to realize the axial and radial positioning of the cloth rolling machine driving shaft 21 and the cloth rolling machine driven shaft 22, and ensure the stability and efficient transmission of the wheels. The two ends of the dust-free cloth 7 are respectively wound on the cloth rolling machine driving shaft 21 and the cloth rolling machine driven shaft 22. When working, the driving wheel is driven by the motor and cooperates with the driven wheel to form a transmission system. The dust-free cloth 7 is fixed by the four-point support tensioning method of the dust-free cloth 7, so as to ensure the stability and reliability of the dust-free cloth 7 during operation.

[0025] Example 2

[0026] like Figure 2-Figure 4A slit coater comprises a coater body and a slit coater cutter head overflow treatment device as described in Example 1 installed on the coater body, wherein the coater body comprises an operating table, a main base 4, a column 6, a No. 2 ball screw 14, a No. 3 servo motor 20, a cutter head lifting module, a cutter head 3 and an air knife 18, etc. The slit coater cutter head overflow treatment device cooperates with the cutter head lifting module to achieve cutter head overflow treatment; specifically, the cutter head lifting module mainly comprises a No. 1 servo motor 1 and a ball screw 2, the ball screw 2 is installed between two columns 6 through a No. 1 support frame 16, and the No. 1 servo motor 1 is installed at the upper end of the ball screw 2. When the No. 2 ball screw 14 and the No. 3 servo motor 20 control the cutter head overflow automatic treatment module to move to the bottom of the cutter head, the cutter head lifting module controls the cutter head 3 to move to the corresponding position on the dust-free cloth 7, and an interaction force will be generated between the cutter head 3 and the dust-free cloth 7, which is the pre-preparation position for cutter head overflow treatment ( Figure 5 ), then the cloth winding machine driving shaft 21, the cloth winding machine driven shaft 22, and the dust-free cloth cloth winding machine 8 control the cloth delivery speed of the dust-free cloth 7, and at the same time, the moving speed of the dust-free cloth cloth winding machine 8 is controlled by the servo motor 10 and the ball screw 15, and the automatic processing function of the overflow of the cutter head is realized in coordination with the cloth delivery speed.

[0027] In this embodiment, the slit coater cutter head overflow processing device is installed on the same ball screw as the main base 4, and the two parts are respectively mounted on the second slider 24 and the third slider 25. The second slider 24 and the third slider 25 maintain a certain distance, so that the subsequent processes can be carried out quickly after the cutter head overflow is processed. Specifically, a group of through grooves are symmetrically opened on the operating table, the main base 4 is installed on the No. 2 ball screw 14 through the No. 3 slider 25, the No. 3 slider 25 is connected to the main base 4 through the No. 4 support frame 23, the No. 4 support frame 23 runs through a group of through grooves, the upper end is connected to the main base, and the lower end is connected to the No. 3 slider; the slit coater blade overflow treatment device is installed on the No. 2 base 12, the No. 2 base 12 is installed on the No. 2 ball screw 14 through the No. 2 slider 24, the No. 2 slider 24 is connected to the No. 2 base 12 through the support column 13, the support column 13 runs through a group of through grooves, the upper end is connected to the No. 2 base, and the lower end passes through the through groove and is connected to the No. 2 slider.

[0028] When this specific implementation is used, the moving speed of the dust-free cloth can be controlled by the servo motor 10 and the ball screw 15, the cloth delivery speed of the dust-free cloth can be controlled by the cloth winder driving shaft 21 and the cloth winder driven shaft 22, and the interaction force between the cutter head and the dust-free cloth can be controlled by the servo motor and the ball screw 2, so that the slit coater can automatically complete the overflow processing in a closed space (vacuum or nitrogen atmosphere).

[0029] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not intended to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A device for treating overflow from a slot coating machine blade, characterized in that: It includes a No. 2 servo motor, a No. 3 ball screw, a dust-free cloth winder installed on the No. 3 ball screw through a No. 1 slider, and a dust-free cloth wound on a cloth winder driving shaft and a cloth winder driven shaft of the dust-free cloth winder. The No. 2 servo motor is installed at one end of the No. 3 ball screw and is used to control the moving speed of the dust-free cloth winder through the No. 3 ball screw and the No. 1 slider. The dust-free cloth winder controls the cloth delivery speed of the dust-free cloth through the cooperation of the cloth winder driving shaft and the cloth winder driven shaft.

2. A slit coater, comprising a coater body, characterized in that: It also includes the slit coater blade overflow processing device as described in claim 1.

3. A slit coater according to claim 2, characterized in that: The coating machine body includes an operating table, a main base slidably installed above the operating table through a No. 2 ball screw and a No. 3 slider, and a cutter head lifting module and a cutter head installed above the operating table through two columns. A group of through grooves are opened on the operating table, and the slit coating machine cutter head overflow processing device is installed on the No. 2 ball screw through the No. 2 slider.

4. A slit coater according to claim 3, characterized in that: A certain distance is maintained between the second slider and the third slider.

5. A slit coater according to claim 3, characterized in that: When the ball screw and the servo motor control the cutter head overflow automatic processing module to move to the bottom of the cutter head, the cutter head lifting module controls the cutter head to move to the corresponding position on the dust-free cloth, and an interaction force is generated between the cutter head and the dust-free cloth.

6. The slit coater according to claim 3, characterized in that: The slit coater blade overflow processing device is installed on the second base, the second slider is connected to the second base through a support column, and the third slider is connected to the main base through a fourth support frame.

7. The slit coater according to claim 6, characterized in that: The support column and the fourth support frame are both slidably arranged in a group of through grooves.

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