Before welding, the bracket components to be joined are precisely aligned and fixed on the fixture of the ultrasonic plastic welding machine. After starting the equipment, the ultrasonic transducer converts electrical energy into high-frequency mechanical vibration (typically 20kHz–35kHz), which is transmitted to the contact surface of the workpiece through the welding head. The vibration and friction instantly generate heat, causing the plastic to locally melt and fuse under pressure. After the vibration stops, the material rapidly cools and solidifies under pressure, forming a permanent molecular-level bond.

The entire process requires no preheating and produces almost no excess heat-affected zone, therefore the bracket structure is less prone to deformation and has high dimensional stability, making it particularly suitable for the mass production of precision small components.

Advantages of Jiayuanda Ultrasonic Welding for Mobile Phone Brackets

1. Jiayuanda ultrasonic welding utilizes high-frequency mechanical vibration to induce molecular-level fusion at the contact surface of plastic components, forming a uniform and dense weld effect. Compared to traditional adhesive or screw fixing, the weld joint has significantly improved impact resistance and fatigue resistance, and the bracket is less prone to loosening or breakage even after repeated adjustments.

2. The entire process is completed within seconds, requiring no chemical adhesives or auxiliary materials, and generating no dust or harmful volatile substances, aligning with green manufacturing trends. The welded surface is clean and seamless, facilitating subsequent painting or labeling and enhancing the product's aesthetics.

3. Common plastics such as ABS, PC, and PP can all achieve high-strength joints through ultrasonic welding, helping designers break free from the limitations of fasteners and achieve thinner, more integrated structural designs, especially suitable for phone holders with hinges and telescopic structures.