Working principle of automatic hot melt adhesive coater

Operation and coating amount control of combined scraper coater (I) structure of combined scraper coating head and application profile of soft and hard scraper structure of combined scraper coating head: see Figure 16 for the components of combined scraper coating head. Characteristics and functions of combined scraper coating head: scraper coating is generally controlled and operated through the adjustment of scraper angle. However, the combined scraper complements the situation without changing the scraper angle. Only the pressure load of the scraper is changed to control the characteristics of the coating amount. This helps to prevent scraper marks or coating quality problems when changing the coating amount. This is particularly important in low weight coating. In order to change the pressure load on the top of the scraper, the clamping beam equipped with the scraper moves in or out on the guide rail. However, the position of the scraper pressure bracket is not changed. The above mobile communication

The working principle of hot melt adhesive coater is the same as that of automatic coater, but its performance varies according to different models and manufacturers. The vertical frame of the screen coater is equipped with a device that can clamp the screen frame. The front and back of the screen area is a horizontal coating mechanism, which is composed 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 arm of the coater. Through the transmission of belt, chain or cable, the coating mechanism moves up and down to coat along the surface of the screen. The transmission mechanism is connected to the servo or frequency conversion motor to make its operation stable and can accurately Yue control the position of the coating mechanism.

Before coating, load the clean and stretched net from the front of the coater, and some models can also be loaded from the side. In the models designed for large format mesh frames, the side plate loading of hot melt adhesive coater is more common, because the mesh frame is large and bulky, and the side plate loading can reduce the lifting and moving amount. When the automatic screen coater runs online 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 it is installed, once it is in the correct position, the pneumatic clamping device or mechanical clamping device will be closed and the hot melt coater will be locked. In order to make the operation more convenient, many models have foot pedals to control the clamping action, and the operators can free up their hands to control it.

After installation, fill the automatic coater with the corresponding photosensitive emulsion, and the hot melt coater can 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 apply photosensitive emulsion on the screen through multiple wet pressing operations; Or add drying process after each coating.

The above information is provided by the hot melt adhesive coater