Co directional UV roller coater low viscosity coating
The UV roller coater whose rotation direction of the coating roller is the same as the moving direction of the coated coil (or plate) is called the same direction roller coater. The same direction roller coater is suitable for low viscosity coatings, generally used for thin film coatings, and the film thickness is 10 ~ 20 μ m。 Generally, the coating speed shall not exceed 100M / min. if it exceeds 100M / min, the reverse roller coating machine shall be used. Compared with the reverse roller coater, the wear of the coating roller (rubber roller) is small.
(1) A co directional UV roller coater for coiled materials. The reclaiming roller and coating roller, coating roller and support roller of the roller coater rotate in the same direction. Actual speed adjustment ratio: Reclaiming roller / coating roller = 1.5 ~ 1.0, coating roller / support roller = 0.3 ~ 1.0. Adjust the film thickness by adjusting the gap between the coating viscosity and the rotating roller.
(2) The same direction UV roller coater for the top material plate is used. This roller coater supplies the coating from the top. The rotation directions of the reclaiming roller and the adjusting roller, the adjusting roller and the coating roller, the coating roller and the support roller are the same, and the peripheral speeds of the four rotating rollers are the same. The film thickness is adjusted by adjusting the gap between the reclaiming roller and the adjusting roller.
Reverse roller coater
The UV roller coater whose rotation direction of the coating roller is opposite to the moving direction of the coated coil (or plate) is called the reverse roller coater. The reverse UV roller coater can use high viscosity coating, which is suitable for thick film coating, and its viscosity can reach more than 120s (coating - 4 cups).
Coil reverse roller coater there are two forms of coil reverse roller coater.
The coating roller and support roller of UV roller coater rotate reversely, but the reclaiming roller and coating roller rotate in the same direction. Common circumferential speed ratio: coating roller / backup roller = 1.1 ~ 1.3, and the circumferential speed ratio for coating thixotropic coating is 1.5 ~ 1.6; Reclaiming roller / backup roller = 0.2 ~ 0.4. Compared with the same direction roller coater, this roller coater is suitable for thicker film coating with higher viscosity coating, and the film thickness can be obtained is 5 ~ 100 μ M (wet film). Adjust the film thickness by adjusting the gap between the reclaiming roller and the coating roller.
