Below are the key technical points of this application solution:
I. Why choose a jet valve?
Compared to traditional needle dispensing, pneumatic jet valves offer several core advantages in FPC button encapsulation applications:
● Non-contact dispensing: The jet valve delivers adhesive droplets to the target location via high-speed jetting, eliminating the need for Z-axis vertical movement. This perfectly solves the problem of FPC flexible circuit boards being easily deformed or displaced by external forces, and avoids damage caused by needle collisions.
Pneumatic injection glue dispensing valve F-Q101
● Impact Pin Stroke: While ensuring adhesive dispensing machine, minimize the impact pin stroke to reduce the vacuum zone formed between the nozzle and the impact pin when it lifts, thus reducing the chance of air being drawn in at the source.
● Feed Air Pressure (Back Pressure): Appropriately increase the feed air pressure (usually in the range of 0.2-0.4 MPa) to allow the adhesive to quickly fill the vacuum zone. However, if the air pressure is too high, it may force air into the adhesive; fine-tuning is required based on the actual dispensing situation.
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