Work flow of coater
The rolled base materials, such as paper, cloth, leather, aluminum foil, plastic film, etc., are coated with a layer of glue, paint or ink with specific functions, and dried before winding.
Working principle of automatic coater: the working principle of automatic coater for screen printing plate making is the same, but its performance varies according to different models and different manufacturers. The vertical frame of the screen coater is provided with a device capable of clamping the screen frame. The front and back of the screen area is a horizontal coating mechanism, which is composed of a coating groove and mechanical or pneumatic parts that control the angle and pressure of the coating groove.
The two ends of the coating mechanism are installed on the vertical support arm of the coating machine. Through the transmission of belt, chain or cable, the coating mechanism moves up and down to coat along the surface of the screen. The driving mechanism is connected to the servo or frequency conversion motor to make it operate smoothly and accurately control the position of the coating mechanism. Before coating, will clean, stretch the screen from the front of the coater, some models can also be loaded from the side screen. In the model designed for large format screen frame, the side mounting is more common, because the screen frame is large and bulky, the side mounting can make the lifting amount and moving amount smaller. When the automatic screen coater is connected with other automatic screen processing equipment (such as cleaning equipment, regeneration equipment, drying device and developer), 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 operate more convenient, many models have pedal control version clip action, the operator can free up both hands to control the screen. After installing the screen, fill the corresponding emulsion into the automatic coater and 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 ways of coating, one is to apply photosensitive emulsion on the screen through multiple wet pressing operations, or to add drying process after each coating. A machine for quantitatively coating liquid (or melt) polymer materials such as adhesives or coatings on the surface of materials.
It is suitable for the production of PVC / PE film and other soft base materials
Simply put, it is to apply glue to the film. It includes gluing, drying, winding and tension control.
Film can be PVC, PE, pet... Also can be some paper, such as re release paper coated with hot melt adhesive.