Advantages and disadvantages of high temperature glass ink in the printing process

In order to prevent high-temperature glass ink pollution caused by improper operation during the printing process, the following aspects should be controlled:

1. The positioning of the glass should be accurate when printing.

Whether it is manual printing or machine printing high temperature glass ink, first of all, adjust the corresponding between the screen and the glass to ensure that the edge of the glass is evenly exposed (1~ 2) mm, so as to avoid ink infiltration on the edge of the glass and contaminate the glass. After the screen and the glass are aligned, select the lock button to lock the position between the screen and the glass. In addition, the position of the screen can also be fine-tuned during printing, which is relatively easy to control; for manual printing, it is best to make a manual printing countertop that can position the glass and screen, so as to improve the quality of the high temperature glass ink product while also utilizing the improvement of production efficiency.

2. The edge quality of the glass should be guaranteed.

The glass used for screen printing must be edged, no residual exposed edges are allowed, the diagonal corners should be rounded, and sharp corners are not allowed. The sharp corners of the glass can easily cause damage to the screen, resulting in ink leakage. Pollution of the edge of the glass. For machine printing, in order to reduce the friction of the glass edge on the screen plate, we need to make a positioning plate with the same thickness as the glass. The positioning plate is installed on the scratch-off end and the ink-return end, so that during printing, the scratch plate and the ink-return plate can be used. Transition to the glass smoothly, the thickness of the positioning plate must be consistent with the thickness of the printed glass; the cleanliness of the glass surface to be printed is also very important. The surface of the glass to be printed adheres to dust or impurities. During the printing process, due to the effect of the pressure when the scraper is scratched, the plate film of the screen plate will be damaged, and in severe cases, it will lead to the rupture of the screen plate film Holes, resulting in ink leakage and contamination of the glass. In order to avoid high-temperature glass ink pollution caused by this reason, for glass screen printing, it is best to place a glass washing and drying machine at the front end of the screen printing machine if conditions permit. The screen printing machine is connected to the washing and drying machine for production, which can keep the glass printing surface clean, which is very conducive to the smooth progress of printing, especially for large quantities of the same type of glass printing.

If there is no condition, a blow gun can be installed at the position of the upper sheet stage. The air source is the compressed air of the air compressor. Each time the sheet is applied, the printing surface of the glass is purged with the blow gun, so that the dust adsorbed on the glass surface can be blown away. Blow away the printing surface of the glass to facilitate the smooth progress of printing. Furthermore, you can also use DuPont paper to wipe the surface of the glass before printing.

3. Control the cleanliness of high temperature glass ink.

If impurities and dust are mixed in the ink, under the action of the scraper pressure during the printing process, the screen plate film will also be worn and broken, resulting in ink leakage pollution of the screen plate.

In actual production, for the recycling of high-temperature glass ink that has not been used up on the screen in printing, it is best to filter it with a mesh cloth and then pour it into the ink barrel.

When printing, the diagonal of the lower ends of the rubber strip of the scraper plate should be rounded. If it is too sharp, after the scraper plate is scratched on the screen plate for many times, it is easy to scratch the screen plate under the action of pressure, resulting in ink leakage from the screen plate. Therefore, every time the scraper plate replaces the rubber strip, it is necessary to round the corners at the lower ends of the rubber strip to avoid wear and tear on the screen plate.
During the printing process, the printing operator should always pay attention to the effect of printing. It is best to install a daylight tube at the lower part of the transition roller table at the entrance and outlet of the dryer, so as to facilitate the inspection of the printing effect of the glass. In the actual printing production, once it is found that there is a high-temperature glass ink pollution spot on the glass surface, the back of the screen should be treated with tape in time. If the screen cannot be repaired, a new screen should be replaced in time.

In addition, the high-temperature glass ink printing process should always ensure the cleanliness of the printing table, the ink on the table should be treated in time, and the ink spoons and ink shovels used should not be placed everywhere. When printing operators put high-temperature glass ink or wipe the screen, it is best to Wear disposable plastic film gloves.