To acheiving waterproofing for TWS earbuds with their small size and often irregular shapes put demands on the adhesive dispensng system.  To meet consumer demand, production is done on high volume assembly lines. To meet all the requirements for a precise adhesive bonding processes that include multiple bonding positions and complex paths a system must integrate robust dispensing and valve automation

In TWS earbud adhesive bonding, it's common to encounter interference positions. Axxon addresses customized requirements by developing various sizes of piezoelectric valve needles and nozzles, enabling precise adhesive application while avoiding interference. Multiple bonding positions sometimes require product inversion and FPC folding. Axxon has developed the IS-500TD dual-station, dual-head adhesive dispenser, integrating UV lamps, compression devices, four-axis flipping, FPC flipping modules, AVI detection functions, and MES expansion. Material placement before and retrieval after, dual Y-axis alternate operation, grating, and photoelectric devices ensure safety while improving operational efficiency and saving labor.

For adhesive bonding on irregular surfaces of TWS earbuds, spatial curved surface multi-axis coordinated motion is employed.  As earphone products are made of plastic, with inconsistent characteristics, the adhesive path needs to recognize product deformation and automatically compensate. Axxon's five-axis coordinated motion control system perfectly addresses these variable deformations with the implementation of spatially irregular curved surface paths. Piezoelectric valve frequency integration with the motion control speed ensures the quality of adhesive application on irregular surfaces. A powerful vision system conducts flying edge detection for adhesive paths, accurately compensating for product deformation and improving adhesive position accuracy.

The automation level of TWS earbud production is increasing. Axxon has introduced the compact AS450 inline adhesive dispenser, integrating adhesive dispensing, AVI detection, UV lamps, compression devices, MES communication, with powerful functions and the capability for online connection, achieving fully automated production of the entire product.