The main functions of roller coaters include coating, steering and support. Roller coaters achieve these functions through their specific mechanisms and components:
Coating function: The coating mechanism of a roller coater consists of a pick-up roller, a coating roller and a coating tray, usually called a two-roller type. The pick-up roller takes the coating from the coating tray and transfers it to the coating roller, which then applies the coating to the surface of the coil. Each roller is equipped with an adjustment device that can adjust the gap and pressure between the rollers to obtain the required coating amount. For roller coaters with higher production speeds, two coating heads are often set to quickly replace the coating and coating rollers.
Steering and support functions: The steering and support mechanisms of a roller coater consist of a steering roller, a support roller and a top roller. The steering roller turns the coil 180 degrees so that the coil enters the support roller at a suitable angle; the support roller supports the coil to receive the front coating during coating; the top support roller plays a supporting role between the support roller and the back coating head. By adjusting the top support distance through the adjustment mechanism, the coating amount on the back of the coil can be adjusted. When the machine is stopped and the coil seam passes, these mechanisms will automatically adjust to protect the coating roller from damage.
Drive mode: The roller drive of the roller coater is divided into two modes: collective drive and single roller drive. Collective drive means that all rollers are driven by one motor. This drive mode is not easy to change the process parameters; while single roller drive means that each roller is equipped with a dedicated DC motor, which can change the rotation direction and speed at will, and it is easy to change the process parameters.