Dongguan SenRen Machinery Co, Ltd
4Information

About the construction of the roll coater


The roll coater is mainly composed of a coating mechanism and a steering support mechanism.
1. Coating mechanism
The coating mechanism, also referred to as the coating head, consists of a take-up roll, a coating roll, and a paint pan. This form of construction is commonly referred to as a two-roll type. The purpose of the take-up roll is to pick up the paint from the paint pan and transfer the paint to the applicator roll, which coats the paint on the surface of the web. Each roller is provided with adjustment means for adjusting the gap and pressure between the rollers to obtain the required coating amount. When the machine is stopped and the seam of the web passes, the front application roller can be automatically disengaged from the web by an automatic adjustment device to protect the coating roller from damage.
The difference between the three-roller coating head and the two-roller type is that an adjustment roller is added, and the gap between the regulating roller and the take-up roller is adjusted to adjust the wet film thickness.
Roller coating machines with higher production speeds often have two coating heads. The right side shows two coating heads on the front side of the coil. The two coating heads are designed to quickly change the coating and coating rolls. .
2, steering, support mechanism. Actual use
The steering and support mechanism is constructed by a steering roller, a support roller, and a top roller. The steering roller steers the web at 180 ° C to bring the web into the support roller at an appropriate angle; the support roller is coated, the support web is subjected to front coating; the top roller is between the support roller and the back coating head The coil material acts as a top support, and the amount of coating on the back side of the coil can be adjusted by adjusting the distance of the top support by the adjusting mechanism. When the machine stops and the seam of the coil passes, the coil is lifted off the back coating roller by means of an automatic adjusting device. Protect the applicator roller from damage.
3, the driving method
The driving of the roll of the roll coater is divided into two modes: collective drive and single roll drive. Collective driving means that all the rollers of the roll coater are driven by one motor, and this driving method is not easy to change the technical parameters. The single-roller drive is equipped with a dedicated DC motor for each roller, which can change the direction of rotation and the speed of rotation arbitrarily, and easily change the technical parameters of the process.