1. In the production of pen barrels, it is necessary to ensure the structural stability to prevent cracking and falling apart during daily writing and carrying. At the same time, the pursuit of exquisite appearance is also essential, making the surface of the pen barrel smooth and flawless to meet consumers' demand for the aesthetics of writing tools. Additionally, production efficiency and cost control need to be taken into account to adapt to large - scale market supply.

2. Ultrasonic welding technology, with its outstanding performance in aspects such as structural stability, exquisite appearance, and high - efficiency production, has become the core support for pen barrel manufacturing. It not only improves the quality of pen barrels but also promotes the writing tool industry to move towards a more high - quality, efficient, and environmentally friendly direction, bringing consumers a better writing partner and writing a new chapter in pen barrel manufacturing.