Common defects and solutions of photovoltaic glass coated by vacuum coating machine?- Ningbo Danko Vacuum Technology Co., Ltd.

Common defects and solutions of photovoltaic glass coated by vacuum coating machine?

In the functional development of architectural glass, the coating process of photovoltaic glass vacuum coating machine 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 the market application field. . Due to the influence of various factors, photovoltaic glass often has coating defects during the coating process. The following editor will introduce it in detail:

One: coating process

1. It is roughly divided into side line, dripping, roll printing, etc. The coating side line refers to a straight line on the long side of the glass, sometimes parallel to the long side, sometimes crossing the long side. The reason for this is that after producing narrow glass for a period of time, the coating cots contacting the glass are worn, and the cots are not replaced or the glass is skewed when replacing the wide glass. The solution is to replace the new rubber roller or adjust the position to correct the skewed glass.

2. Coating droplets refer to the irregular small circles on the surface of the coating layer. The reason is that the liquid tanks on both sides are not properly cushioned 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 pipes.

3. It is roughly divided into perimeter printing, card head, color difference, diagonal stripes, film surface flowers, etc. The reason is that the temperature is too high during glass coating. The solution is to appropriately reduce the temperature of the preheating furnace.

4. The card head 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.

Two: Coating raw materials

Coating raw material defects can be roughly divided into card head, color difference, drag mark, film surface flower and so on. Coating raw material card head is mainly because the glass thickness difference is too large, the corresponding solution is to strengthen the control of the thickness difference of the original glass; the color difference of the coating raw material is mainly the glass thickness difference is too large or the surface has shallow pits, the corresponding solution is to strengthen the raw material Control; drag marks are multiple straight lines appearing on the glass. The reason is that the roughness of the glass is too large. The solution is to make the speed of the rubber roller greater than the speed of the belt, and strengthen the control of incoming materials.

3. Coating external environment

It can be roughly divided into dirt in the film layer, air knife mark, sucker mark, roller table dirt, white spot dirt, watermark, water stain, rain dirt, water mist, bright spot, etc. Common dirt includes: dirt inside the film layer , Air knife mark, suction cup mark, roller dirt, white spot dirt, watermark, water stain, rain dirt, water mist. Causes: The cleaning machine before the coating is dirty, the air knife of the cleaning machine is dirty, the sucker is aging, the original sheet has too little anti-mildew powder, the connecting roller table is dirty, the rain leaks after the coating, and the cleaning machine air after tempering The knife is blocked, the air knife of the tempered washing machine is dirty, the roof leaks, the air is humid, and the tempered washing machine cannot dry the glass.

The solution is to rinse and clean the washing machine, increase the frequency of maintenance of the washing machine, clean the air knife, replace the suction cup of the transplanter, and require the original film to be added with anti-mildew powder, etc. Wipe the roller table dirty with alcohol. Cover with a tarp and repair the roof after the rain. Wipe the washer air knife. Clean and maintain the washing machine. Cover with a tarp and repair the roof after the rain. Install a heating device after the washing machine.

Photovoltaic glass vacuum coating machine coating above is the longest three parts of defects, specific other defects, need to be dealt with according to the specific situation.