A cleaning system for a screen printing support table

Abstract

The utility model relates to a kind of cleaning system of silk screen printing bearing platform, the cleaning system moves with roll type transmission device, and the cleaning area of roll type conveyor belt is contacted with cleaning fluid in water washing device, residual etching slurry on roll type conveyor belt can be removed, the circulation use of roll type conveyor belt can be realized, and then the waste of roll type conveyor belt caused when silk screen printing screen is cleaned can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of solar cell fabrication, specifically to a cleaning system for a screen printing support platform. Background Technology

[0002] Edge etching is a crucial step in the fabrication of heterojunction solar cells. Edge etching involves using a screen printing stencil to print etching paste onto the transparent surface of the back side of the heterojunction solar cell, creating a ring-shaped blank area on the back side to prevent the front and back of the heterojunction solar cell from conducting.

[0003] After the edge etching process is completed, the etching paste on the carrier for transporting the solar cells needs to be cleaned to allow for reuse and to carry new solar cells. Current cleaning processes typically involve first wiping the surface etching paste using a paper roll mechanism, followed by manual cleaning. This traditional cleaning process not only damages the screen printing stencil but also wastes paper rolls. Utility Model Content

[0004] The purpose of this invention is to provide a cleaning system for a screen printing carrier table to solve the problems of damage to the screen printing screen and waste of paper rolls in the prior art.

[0005] To achieve the above objectives, this utility model provides a cleaning system for a screen printing carrier, which includes a roll-type transmission device and a water washing device. The spiral drive device includes a transmission mechanism and a spiral conveyor belt; the spiral conveyor belt is closed and tensioned and wound around the transmission mechanism; the spiral conveyor belt is used to carry and transport solar cells; The bearing surface of the roll conveyor belt includes a cleaning area, and the washing device is configured to clean the cleaning area.

[0006] Optionally, the transmission mechanism includes a battery cell platform, a transmission motor, a drive shaft, and multiple driven shafts; The output end of the drive motor is connected to the drive shaft, and the coiled conveyor belt is closed and tensioned and wound around the bearing surface, drive shaft and driven shaft of the battery cell platform; The portion of the roll conveyor belt that is supported by the solar cell platform forms an etched area, which is used to support and transport solar cells. The cleaning area is located downstream of the etching area.

[0007] Optionally, the washing device includes a washing assembly and a waste liquid collection assembly; The cleaning assembly includes multiple cleaning fluid nozzles for spraying cleaning fluid onto the surface of the cleaning area. The inlet of the cleaning fluid nozzle is connected to the cleaning fluid source, and the outlet of the cleaning fluid nozzle faces the surface of the cleaning area. The waste liquid collection component is configured to collect the waste liquid generated by the cleaning component.

[0008] Optionally, the cleaning assembly includes a first cleaning module, a second cleaning module, and a third cleaning module; In the cleaning area, the cleaning sub-area corresponding to the first cleaning module is located upstream of the cleaning sub-area corresponding to the second cleaning module; the cleaning sub-area corresponding to the second cleaning module is located upstream of the cleaning sub-area corresponding to the third cleaning module. The waste liquid collection assembly includes a first waste liquid collection module, a second waste liquid collection module, and a third waste liquid collection module; The first waste liquid collection module is configured to collect the waste liquid generated by the first cleaning module; The second waste liquid collection module is configured to collect the waste liquid generated by the second cleaning module; The third waste liquid collection module is configured to collect the waste liquid generated by the third cleaning module.

[0009] Optionally, the inlet of the cleaning fluid nozzle of the first cleaning module is connected to the cleaning fluid source; The inlet of the cleaning fluid nozzle of the second cleaning module is connected to the outlet of the first waste liquid collection module; The inlet of the cleaning fluid nozzle of the third cleaning module is connected to the outlet of the second waste liquid collection module.

[0010] Optionally, the cleaning system further includes a drying device configured to dry the conveyor belt after it has been treated by the water washing device. The drying device includes a drying component; The drying assembly includes multiple hot air nozzles for spraying hot air onto the rolled conveyor belt after it has been treated by the water washing device. The inlet of the hot air nozzle is connected to a hot air source, and the outlet of the hot air nozzle faces the surface of the conveyor belt after it has been treated by the water washing device.

[0011] Optionally, the drying assembly includes a first drying module, a second drying module, and a third drying module; In the surface area of ​​the conveyor belt downstream of the cleaning area, the drying sub-area corresponding to the first drying module is located upstream of the drying sub-area corresponding to the second drying module; the drying sub-area corresponding to the second drying module is located upstream of the drying sub-area corresponding to the third drying module.

[0012] Optionally, the etched area is parallel to the horizontal direction.

[0013] Optionally, the material of the roll conveyor belt is roll paper and / or non-woven fabric.

[0014] Optionally, the roll conveyor belt includes liquid permeable holes to allow cleaning waste liquid to be discharged through the liquid permeable holes.

[0015] Through the above technical solution, as the roll drive moves, the cleaning area of ​​the roll conveyor belt comes into contact with the cleaning liquid in the washing device, which can remove the residual etching paste on the roll conveyor belt, realize the recycling of the roll conveyor belt, and thus avoid the waste of the roll conveyor belt caused by the cleaning of the screen printing stencil.

[0016] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description

[0017] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This utility model relates to a cleaning system for a screen printing carrier.

[0018] Explanation of reference numerals in the attached figures 1. Conveyor belt; 2. Washing device; 3. Drying device; 4. Screen printing plate; 5. Solar cell; 6. Cell platform; 7. Drive shaft; 8. Driven shaft; 9. Etching area; 10. Cleaning area; a. First rotational direction; b. First direction. Detailed Implementation

[0019] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0020] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0021] In the description of this utility model, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in its normal operating state, for example, referring to... Figure 1In the drawing orientation, "inner" and "outer" refer to those relative to the outline of the device. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first," "second," or "third" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] like Figure 1 As shown, this utility model provides a cleaning system for a screen printing carrier, which includes a roll-type transmission device and a water washing device 2. The spiral drive device includes a transmission mechanism and a spiral conveyor belt 1; the spiral conveyor belt 1 is closed and tensioned and wound around the transmission mechanism; the spiral conveyor belt 1 is used to carry and transport solar cell sheets 5; The bearing surface of the roll conveyor belt 1 includes a cleaning area 10, and the washing device 2 is configured to clean the cleaning area 10.

[0023] Through the above technical solution, as the roll drive moves, the cleaning area 10 of the roll conveyor belt 1 comes into contact with the cleaning liquid in the washing device 2, which can remove the residual etching paste on the roll conveyor belt 1, realize the recycling of the roll conveyor belt 1, and thus avoid the waste of the roll conveyor belt 1 caused by cleaning the screen printing stencil 4.

[0024] In one embodiment, the transmission mechanism of this utility model includes a battery cell platform 6, a transmission motor, a drive shaft 7, and multiple driven shafts 8; wherein the positions of the battery cell platform 6, the transmission motor, the drive shaft 7, and the multiple driven shafts 8 are all fixed.

[0025] In one embodiment, the drive motor, drive shaft 7, and driven shaft 8 are all conventional choices in the art, and this application does not make any special requirements.

[0026] In one embodiment, the output end of the drive motor is connected to the drive shaft 7, and the coiled conveyor belt 1 is tensioned and wound around the bearing surface of the battery cell platform 6, the drive shaft 7, and the driven shaft 8. When the drive motor is working, the drive shaft 7 rotates along the first rotation direction a with the rotation of the output end, thereby driving the coiled conveyor belt 1 to move along the corresponding loop direction.

[0027] In one embodiment, the portion of the roll conveyor belt 1 carried by the solar cell stage 6 forms an etched region 9, which is used to carry and transport solar cells 5.

[0028] In the above embodiment, the solar cell 5 is placed in the etching area 9, and as the conveyor belt 1 moves, the solar cell 5 moves in the first direction b to a suitable position, and then the conveyor belt 1 stops moving. At this time, the screen printing plate 4 is moved downward to perform edge etching on the solar cell 5. After the edge etching is completed, the screen printing plate 4 is moved upward, and the conveyor belt 1 starts moving again, causing the solar cell 5 to continue moving in the first direction b until it leaves the bearing area of ​​the cell carrier 6.

[0029] In one embodiment, the etched region 9 is parallel to the horizontal direction. In this embodiment, when the etched region 9 is parallel to the horizontal direction, it avoids etching deviation during edge etching and improves the edge etching effect.

[0030] In one embodiment, the cleaning area 10 of this invention refers to the area treated by the water washing device 2, and the cleaning area 10 is located downstream of the etching area 9. In this embodiment, since etching paste remains on the conveyor belt 1 carrying the solar cell 5 during edge etching, as the conveyor belt 1 moves, this area leaves the cell carrier 6 and enters the corresponding area of ​​the water washing device 2, forming the cleaning area 10. Therefore, the cleaning area 10 is always downstream of the etching area 9.

[0031] In one embodiment, the number and position of the drive shaft 7 and the driven shaft 8 can be flexibly set according to actual needs.

[0032] In one embodiment, the drive shaft 7 and a plurality of driven shafts 8 are arranged sequentially along the direction of movement of the coil conveyor belt 1; or, the drive shaft 7 and a plurality of driven shafts 8 are arranged sequentially in the opposite direction to the direction of movement of the coil conveyor belt 1; or, the drive shaft 7 is arranged between two adjacent driven shafts 8 along the direction of movement of the coil conveyor belt 1. It should be noted that the direction of movement of the coil conveyor belt 1 refers to the loop direction corresponding to the rotation direction of the drive shaft 7, for example, the loop direction corresponding to the first rotation direction a.

[0033] In one embodiment, the transmission mechanism further includes a plurality of rotating support shafts for supporting the roll conveyor belt 1 and improving the load-bearing capacity of the roll conveyor belt 1; wherein, the rotating support shafts are conventional choices in the art and are not subject to special requirements in this application.

[0034] In one embodiment, the position of the rotating support shaft can be flexibly set according to actual production needs. For example, the rotating support shaft can be set between two adjacent driven shafts 8, or between the drive shaft 7 and the nearest driven shaft 8, so as to improve the load-bearing capacity of the roll conveyor belt 1 and ensure that the roll conveyor belt 1 does not deform.

[0035] In one embodiment, the material of the roll conveyor belt 1 of this utility model includes, but is not limited to, rolled paper and / or non-woven fabric.

[0036] In this embodiment, the roll paper and nonwoven fabric described in this invention are commonly used materials for cleaning screens after edge etching treatment. For example, the roll paper includes, but is not limited to, one or more of cotton paper, filter paper, kraft paper, and synthetic paper; the nonwoven fabric includes, but is not limited to, one or more of polyester nonwoven fabric, polypropylene nonwoven fabric, nylon nonwoven fabric, and spunlace nonwoven fabric. In this embodiment, since the roll conveyor belt 1 needs to absorb the edge etching slurry, the roll paper needs to have low dust, high liquid absorption, and high strength properties. Using a roll conveyor belt 1 made of suitable materials can improve its service life.

[0037] In one embodiment, the thickness of the roll conveyor belt 1 can be flexibly set according to actual production needs and materials, as long as the roll conveyor belt 1 has good strength and load-bearing capacity, which will not be elaborated here.

[0038] In one embodiment, the roll conveyor belt 1 of this invention further includes a discharge area for improving the discharge effect of waste liquid after cleaning; the discharge area is arranged on both sides of the cleaning area 10 along the width direction of the roll conveyor belt 1. The cleaning area 10 and the discharge area extend along the direction of the roll conveyor belt 1.

[0039] In one embodiment, the roll conveyor belt 1 of the present invention includes a plurality of uniformly arranged liquid-permeable holes so that cleaning waste liquid can be discharged through the liquid-permeable holes.

[0040] In one embodiment, the liquid permeable holes on the roll conveyor belt 1 are evenly distributed in the discharge area; no liquid permeable holes are provided in the cleaning area 10.

[0041] In one embodiment, the pore size and porosity of the liquid permeable hole can be flexibly set according to the actual production situation, as long as it can ensure that the waste liquid can be quickly discharged through the liquid permeable hole, which will not be elaborated on here.

[0042] In one embodiment, the surface roughness of the spiral conveyor belt 1 that contacts the drive shaft 7 and the driven shaft 8 is greater than the roughness of the bearing surface, so as to avoid the spiral conveyor belt 1 slipping.

[0043] In one embodiment, the washing device 2 includes a cleaning component and a waste liquid collection component. The cleaning component is used to spray cleaning liquid onto the screen to be cleaned, and the waste liquid collection component is used to collect the waste liquid obtained after cleaning.

[0044] In one embodiment, the cleaning assembly includes a cleaning support plate and a cleaning fluid nozzle. The positions of the cleaning support plate and the cleaning fluid nozzle can be flexibly set according to the actual situation, as long as it can ensure that the spraying fluid can be sprayed onto the cleaning area 10 through the cleaning fluid nozzle.

[0045] In one embodiment, the inlet of the cleaning fluid nozzle is connected to the cleaning fluid source, and the outlet of the cleaning fluid nozzle faces the surface of the cleaning area 10, so as to achieve the purpose of cleaning the roll conveyor belt 1.

[0046] In one embodiment, the waste liquid collection assembly is configured to collect the waste liquid generated by the cleaning assembly. The method of waste liquid collection is a conventional choice in the art and is not specifically required in this application; for example, a water tank may be provided directly below the cleaning assembly.

[0047] In one embodiment, the cleaning assembly includes cleaning modules; the number of cleaning modules can be one or more.

[0048] In some embodiments, there are three cleaning modules, namely a first cleaning module, a second cleaning module, and a third cleaning module; in the cleaning area 10, the cleaning sub-area corresponding to the first cleaning module is located upstream of the cleaning sub-area corresponding to the second cleaning module; the cleaning sub-area corresponding to the second cleaning module is located upstream of the cleaning sub-area corresponding to the third cleaning module.

[0049] In one embodiment, the cleaning module includes multiple cleaning fluid nozzles, and the multiple cleaning fluid nozzles are disposed on a cleaning support plate.

[0050] In one embodiment, the number of cleaning fluid nozzles in multiple cleaning modules can be the same or different. For example, the number of cleaning fluid nozzles in the first cleaning module, the second cleaning module, and the third cleaning module gradually decreases.

[0051] In one embodiment, the number of waste liquid collection modules in the washing device 2 can be one or more. In this embodiment, the number of waste liquid collection modules can be set according to the number of cleaning modules, or it can be set only according to the number of washing devices 2.

[0052] In some embodiments, there are three waste liquid collection modules, namely a first waste liquid collection module, a second waste liquid collection module, and a third waste liquid collection module. The first waste liquid collection module is configured to collect waste liquid generated by the first cleaning module; the second waste liquid collection module is configured to collect waste liquid generated by the second cleaning module; and the third waste liquid collection module is configured to collect waste liquid generated by the third cleaning module. In this embodiment, since the waste liquid collection modules are only used to collect waste liquid from their respective cleaning modules, the placement of the multiple waste liquid collection modules is not particularly required and will not be elaborated upon here.

[0053] In one embodiment, when the washing device 2 contains multiple washing modules and multiple waste liquid collection modules, the waste liquid collected by the downstream waste liquid collection module can be used as the cleaning liquid source for the upstream washing module. In this embodiment, since the same washing area 10 in the roll conveyor belt 1 is processed sequentially through the first-stage washing module to the last-stage washing module, the waste liquid obtained after processing by the downstream washing module has lower impurities and can be used as the cleaning liquid source for the upstream washing module, thereby reducing the use of cleaning liquid and reducing the production of waste liquid.

[0054] In some implementations, when there are three cleaning modules and three waste liquid collection modules, the inlet of the cleaning fluid nozzle of the first cleaning module is connected to the cleaning fluid source; the inlet of the cleaning fluid nozzle of the second cleaning module is connected to the outlet of the first waste liquid collection module; and the inlet of the cleaning fluid nozzle of the third cleaning module is connected to the outlet of the second waste liquid collection module.

[0055] In one embodiment, the cleaning fluid used in the washing device 2 is water. There are no special requirements regarding the source of the water, as long as it is sufficient to clean the etching slurry. For example, the water can be one or more types of industrial water, tap water, and distilled water.

[0056] In one embodiment, the cleaning system further includes a drying device 3 configured to dry the roll conveyor belt 1 after it has been treated by the washing device 2.

[0057] In one embodiment, the drying device 3 includes a drying component; wherein the drying component includes a drying support plate and a hot air nozzle fixed to the drying support plate. The positions of the drying support plate and the hot air nozzle can be flexibly set according to the actual production situation, as long as the outlet of the hot air nozzle is directed toward the surface of the roll conveyor belt treated by the water washing device.

[0058] In one embodiment, the inlet of the hot air nozzle is connected to a hot air source, and the outlet of the hot air nozzle is directed toward the surface of the rolled conveyor belt treated by the water washing device, for spraying hot air onto the surface of the rolled conveyor belt treated by the water washing device.

[0059] In one embodiment, the drying assembly includes one or more drying modules.

[0060] In some embodiments, there are three drying modules, namely a first drying module, a second drying module, and a third drying module; in the surface area of ​​the conveyor belt 1 downstream of the cleaning area 10, the drying sub-area corresponding to the first drying module is located upstream of the drying sub-area corresponding to the second drying module; the drying sub-area corresponding to the second drying module is located upstream of the drying sub-area corresponding to the third drying module.

[0061] In one embodiment, the drying module includes a plurality of hot air nozzles, and the plurality of hot air nozzles are disposed on a drying support plate.

[0062] In one embodiment, the number of hot air nozzles in the multiple drying modules can be the same or different. For example, the number of hot air nozzles in the first drying module, the second drying module, and the third drying module gradually decreases.

[0063] In one embodiment, the temperature of the hot air ejected from the hot air nozzle can be flexibly set according to actual production needs, as long as it can ensure that the cleaned roll conveyor belt 1 remains dry after being treated by the drying device 3. Further details are omitted here.

[0064] In one embodiment, the cleaning system further includes a cell collection device; along a first direction b, the cell collection device is disposed at the end of the etched region 9 for collecting solar cells 5 after edge etching treatment.

[0065] In one embodiment, the solar cell collection device is a conventional choice in the art, and this application does not make any special requirements. For example, the solar cell collection device can be a slide rail set at the end of the etched area 9, so that after the solar cell 5 leaves the etched area 9, it is transported to the screen collection point by the action of the slide rail.

[0066] The cleaning system of this invention allows the cleaning area 10 of the roll conveyor belt 1 to come into contact with the cleaning liquid in the washing device 2 as the roll drive moves, thereby removing the residual etching paste on the roll conveyor belt 1 and enabling the roll conveyor belt 1 to be recycled. This also avoids the waste of the roll conveyor belt 1 caused by cleaning the screen printing stencil 4.

[0067] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0068] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. To avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0069] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A cleaning system for a screen printing carrier table, characterized in that, The cleaning system includes a roll-type drive and a water washing device; The spiral drive device includes a transmission mechanism and a spiral conveyor belt; the spiral conveyor belt is closed and tensioned and wound around the transmission mechanism; the spiral conveyor belt is used to carry and transport solar cells; The bearing surface of the roll conveyor belt includes a cleaning area, and the washing device is configured to clean the cleaning area.

2. The cleaning system according to claim 1, characterized in that, The transmission mechanism includes a battery cell platform, a transmission motor, a drive shaft, and multiple driven shafts; The output end of the drive motor is connected to the drive shaft, and the coiled conveyor belt is closed and tensioned and wound around the bearing surface, drive shaft and driven shaft of the battery cell platform; The portion of the roll conveyor belt that is supported by the solar cell platform forms an etched area, which is used to support and transport solar cells. The cleaning area is located downstream of the etching area.

3. The cleaning system according to claim 2, characterized in that, The washing device includes a washing assembly and a waste liquid collection assembly; The cleaning assembly includes multiple cleaning fluid nozzles for spraying cleaning fluid onto the surface of the cleaning area. The inlet of the cleaning fluid nozzle is connected to the cleaning fluid source, and the outlet of the cleaning fluid nozzle faces the surface of the cleaning area. The waste liquid collection component is configured to collect the waste liquid generated by the cleaning component.

4. The cleaning system according to claim 3, characterized in that, The cleaning assembly includes a first cleaning module, a second cleaning module, and a third cleaning module; In the cleaning area, the cleaning sub-area corresponding to the first cleaning module is located upstream of the cleaning sub-area corresponding to the second cleaning module, and the cleaning sub-area corresponding to the second cleaning module is located upstream of the cleaning sub-area corresponding to the third cleaning module. The waste liquid collection assembly includes a first waste liquid collection module, a second waste liquid collection module, and a third waste liquid collection module; The first waste liquid collection module is configured to collect the waste liquid generated by the first cleaning module; The second waste liquid collection module is configured to collect the waste liquid generated by the second cleaning module; The third waste liquid collection module is configured to collect the waste liquid generated by the third cleaning module.

5. The cleaning system according to claim 4, characterized in that, The inlet of the cleaning fluid nozzle of the first cleaning module is connected to the cleaning fluid source; The inlet of the cleaning fluid nozzle of the second cleaning module is connected to the outlet of the first waste liquid collection module; The inlet of the cleaning fluid nozzle of the third cleaning module is connected to the outlet of the second waste liquid collection module.

6. The cleaning system according to claim 1, characterized in that, The cleaning system also includes a drying device configured to dry the conveyor belt after it has been treated by the water washing device. The drying device includes a drying component; The drying assembly includes multiple hot air nozzles for spraying hot air onto the rolled conveyor belt after it has been treated by the water washing device. The inlet of the hot air nozzle is connected to a hot air source, and the outlet of the hot air nozzle faces the surface of the conveyor belt after it has been treated by the water washing device.

7. The cleaning system according to claim 6, characterized in that, The drying assembly includes a first drying module, a second drying module, and a third drying module; In the surface area of ​​the conveyor belt downstream of the cleaning area, the drying sub-area corresponding to the first drying module is located upstream of the drying sub-area corresponding to the second drying module; the drying sub-area corresponding to the second drying module is located upstream of the drying sub-area corresponding to the third drying module.

8. The cleaning system according to claim 2, characterized in that, The etched area is parallel to the horizontal direction.

9. The cleaning system according to claim 1, characterized in that, The material of the roll conveyor belt is roll paper and / or non-woven fabric.

10. The cleaning system according to claim 1, characterized in that, The coiled conveyor belt includes liquid-permeable holes to allow cleaning waste liquid to be discharged through the liquid-permeable holes.

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