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Common defects and solutions for photovoltaic glass coating using pvd coating machines?

2023-12-07

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In the functional development of architectural glass, the coating process of photovoltaic glass pvd coating machines plays a key role. It can effectively improve the control function of glass on light, heat and electricity, and realize the composite effect of glass. It is also widely used in many aspects of market application. . Affected by many factors, coating defects often occur during the coating process of photovoltaic glass. The following is a detailed introduction by the editor of Huicheng Vacuum:


pvd coating machines


1: Coating technology
1. It is roughly divided into edge line, dripping, roller printing, etc. The coating edge line refers to a straight line that appears on the long side of the glass. Sometimes it is parallel to the long side, and sometimes it crosses the long side. The reason is that after producing narrow glass for a period of time, the coating rubber roller that contacts the glass is worn. When replacing wide glass, the rubber roller is not replaced or the glass is skewed. The solution is to replace the rubber roller with a new one or adjust the position to correct the deviation of the skewed glass.
2. Coating drops refer to irregular small circles appearing on the surface of the coating layer. The reason is that the liquid tanks on both sides are not properly padded or the angle of the liquid pipe is not adjusted properly. The solution is to pad the liquid tanks on both sides and readjust the angle of the liquid pipe.
3. It can be roughly divided into perimeter printing, card head, color difference, diagonal stripes, film surface flowers, etc. The cause is that the temperature during glass coating is too high. The solution is to appropriately lower the temperature of the preheating furnace.
4. Head jam refers to the yellowing or bluish phenomenon of the wider head. The reason is that the elasticity of the coating roller decreases after long-term use.
2: Coating raw materials
Defects in coating raw materials can be roughly divided into jams, color differences, drag marks, film surface flowers, etc. The main reason for the chuck of coating raw materials is that the glass thickness difference is too large, and the corresponding solution is to strengthen the control of the thickness difference of the original glass; the color difference of the coating material type is mainly due to the large thickness difference of the glass or the shallow pits on the surface, and the corresponding solution is to strengthen the raw material Control; Drag marks refer to multiple straight lines that appear on the glass. The reason is that the glass is too rough. The solution is to make the rubber roller speed greater than the belt speed and strengthen the control of incoming materials.
3. Coating external environment
It can be roughly divided into dirt inside the film layer, air knife marks, suction cup marks, roller dirt, white spot dirt, watermarks, water stains, rain dirt, water mist, bright spots, etc. Common dirt includes: dirt inside the film layer , wind knife marks, suction cup marks, roller dirt, white spot dirt, watermarks, water stains, rain dirt, and water mist. The reasons are: the cleaning machine before coating is dirty, the air knife of the cleaning machine is dirty, the suction cup is aged, the original film has too little anti-mildew powder, the connecting roller is dirty, rain leaks after coating, and the cleaning machine air after tempering The knife is clogged, the air knife of the tempered cleaning machine is dirty, the roof leaks, the air is humid, and the tempered cleaning machine cannot dry the glass.
The solution is to rinse and clean the cleaning machine, increase the frequency of maintenance and cleaning machine, clean the air knife, replace the suction cup of the transplanter, and require the original piece to be added with anti-mildew powder, etc. Wipe the dirty rollers with alcohol. Cover it with a tarp and repair the roof after the rain passes. Wipe the washer air knife. Clean and maintain cleaning machines. Cover it with a tarp and repair the roof after the rain passes. Install a heating device after the cleaning machine.
The above are the three longest defects of photovoltaic glass pvd coating machines coating. Specific other defects need to be dealt with according to the specific situation.