Coating machine

The coating machine is used for the coating production of BOPP sealing adhesive tapes. Apply a layer of special function glue, paint, or ink to the roll of substrate, and roll it after drying. It adopts a special high-speed coating head, which can effectively reduce the generation of air bubbles. The rewinding and unwinding coils of the coating machine are all equipped with a full-speed automatic film-attachment mechanism, and automatic closed-loop tension control.

The working principle of the automatic coating machine The working principle of the automatic coating machine for screen printing plate making is the same, but its performance varies according to different models and different manufacturers. The screen coating machine is provided with a device capable of clamping a frame in a vertical rack. The front and back of the screen area is a horizontal coating mechanism. The coating mechanism consists of a coating tank, and mechanical or pneumatic components that control the angle and pressure of the coating tank.

The coating machine's work process will roll the substrate, such as: paper, cloth, leather, aluminum foil, plastic film, etc., coated with a layer of specific functions of glue, paint or ink, and dried after winding.

Prior to coating, a clean, stretch-absorbing screen is loaded from the front of the coater, and some models can also be loaded into the screen from the side. In models designed for large format frames, side loading is more common, because the frame is large and bulky, and the side loading makes it possible to increase the amount of lifting and handling. When the automatic screen coating machine is operated online with other automatic screen processing equipment (such as cleaning equipment, regenerating equipment, drying equipment and developing machine), loading from the side is more convenient.

Regardless of how the screen is installed, once the screen is in the correct position, the pneumatic clamping device or the mechanical clamping device is closed, locking the screen. In order to facilitate the operation, many models have a foot pedal to control the clip action, and the operator can free his hands to control the screen. After the screen is installed, apply the corresponding emulsion to the automatic coating machine and start the coating. According to the functions of the control system and the equipment, the equipment can coat both sides of the screen at the same time.

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

Applicable to the production of flexible substrates such as PVC/PE film is simply to apply glue to the film. Specific controls include gluing, drying, rewinding, and tensioning.

Films can be PVC, PE, PET. It can also be some paper, such as hot melt adhesive on release paper.

The purpose of the coating machine is to apply to shoe materials, electronics industry, sponge, EVA, PE, cloth, etc.

S350 frequency changer to the coating machine tension control system plan, the technological requirement The coating machine needs glues or the ink type material evenly adheres on the aluminum foil, the plastic film or the cloth textile surface, the coating process requirement is relatively high, not only requires the coating height Uniform and capable of high-speed, non-stop roll change to increase productivity.

Second, the program advantages 1, the inverter to complete all levels of tension control, the use of tension sensors to achieve tension control, the system is simple and stable. Use the PLC or synchronous controller to control the speed of the drive roller, and at the same time as the line speed signal of other inverters.

2, S350 closed-loop tension control (sense vector control) easy to achieve a constant tension during acceleration and deceleration, saving space to install the tension roller, reduce mechanical costs, while high-precision control to ensure that the coating effect is highly uniform.

3, duplex position retractable roll with pre-driver function, to meet the needs of high-speed non-stop automatic roll change, increase production efficiency. At the same time, accurate winding control can avoid bad heart-type winding, so that the winding effect is better.