The rolled substrates, such as paper, cloth, leather, aluminium foil, plastic film, etc., are coated with a special function of glue, paint or ink, and then rolled up after drying.
The working principle of automatic coating machine: The working principle of automatic coating machine for screen printing plate is the same, but its performance varies according to different models and manufacturers. The screen coating machine is equipped with a device which can clamp the screen frame on the vertical frame. The front and back of the wire mesh area are horizontal coating mechanisms, which are composed of coating grooves and mechanical or pneumatic components that control the angle and pressure of the coating grooves.
The two ends of the coating mechanism are mounted on the vertical support arm of the coating machine. Through the transmission of belt, chain or cable, the coating mechanism moves up and down and coats along the surface of the wire mesh. The transmission mechanism is connected to the servo or frequency conversion motor to make it operate smoothly and precisely control the position of the coating mechanism.
Before coating, the clean and tightened screen plate can be loaded from the front of the coating machine, and some models can also be loaded from the side. Side mounting is more common in machine models designed for large screen frames, because the screen frames are large and bulky, and side mounting can make lifting and moving less. It is more convenient to install plate from side when automatic screen coating machine is on-line with other automatic screen processing equipment (such as cleaning equipment, regeneration equipment, drying equipment and developer).
No matter how the screen is mounted, once the screen is in the right position, the pneumatic clamping device or mechanical clamping device closes and locks the screen. In order to operate more conveniently, many models have pedal control plate clamp action, operators can free their hands to control the screen. After the screen plate is installed, the corresponding photosensitive emulsion is poured into the automatic coating machine, and the coating can begin. According to the functions of the control system and equipment, the equipment can coat both sides of the wire mesh at the same time.
There are two ways of coating, one is to coat the sensitive emulsion on the silk screen by wet pressing for many times, the other is to add the drying process after each coating. Machinery for quantitative coating of liquid (or melt) macromolecule materials such as adhesives or coatings on the surface of materials.
Suitable for the production of soft base materials such as PVC/PE film
Simply put, the glue is coated on the film. Specifically, it includes coating, drying, winding and tension control.
Thin films can be PVC, PE, PET... or some paper, such as hot melt glue on stripping paper.