Working Principle Of Automatic Coating Machine

The working principle of the automatic coating machine used for screen printing is the same, but its performance varies according to different models and different manufacturers. The screen coating machine is equipped with a device that can clamp the screen frame on the vertical frame. Before and after the screen area is a horizontal coating mechanism, which consists of a coating tank, and mechanical or pneumatic components that control the angle and pressure of the coating tank.

Both ends of the coating mechanism are installed on the vertical support arms of the coating machine, and the coating mechanism is moved up and down through the transmission of belts, chains or cables to coat along the surface of the screen. The transmission mechanism is connected to the servo or frequency conversion motor, so that it operates smoothly and can precisely control the position of the coating mechanism.　Before coating, load the clean, stretched screen from the front of the coating machine. Some models can also load the screen from the side. In the models designed for large-format screen frames, side-mounted version is more common, because the screen frame is large and heavy, and the side-mounted version can make the lifting and moving amount smaller. When the automatic screen coating machine and other automatic screen processing equipment (such as cleaning equipment, regeneration equipment, drying device and developing machine) are operated online, it is more convenient to install the plate from the side.

No matter how the screen is installed, once the screen is in the correct position, the pneumatic clamping device or mechanical clamping device is closed to lock the screen. In order to make the operation more convenient, many models have a foot pedal to control the plate clamping action, and the operator can free up his hands to control the screen plate. After installing the screen, pour the corresponding photosensitive emulsion into the automatic coating machine, and then start coating. According to the functions of the control system and equipment, the equipment can coat both sides of the screen at the same time.

There are two coating methods. One is to coat the photosensitive emulsion on the screen through multiple wet pressing operations; or to add a drying process after each coating. A machine that quantitatively coats liquid (or melt) polymer materials such as adhesives or coatings on the surface of the material.