Ultrasonic spot welding machine Main features: 1. The Ultrasonic Spot welder applies to plastic products in the riveting, cutting, stitching, welding etc. 2. The defects of optimizing welding is as followed: yellowing, burned edge, blocked up etc.Specification parameters: Model XD-2850 XD-3580 XD-2010 Frequency 28KHZ 35KHZ 20KHZ Power 500W 800W 1000W Working Method: Auto-excitation Type Welding Time 0.01-9.99sec Welding area Dimension 300 * 350 * 150 150 * 300 * 400 450 * 550 * 150 Weight 15kg 20kg 25kg Note: there are some samples which our machines had done. if your company has any requirement, we can adjust our machine according to your requires! thank you! welcome your coming!