Suit for plastic box, plastic sheet, hollow sheet. Ultrasonic welding machine for plastic boxCharacteristic:Hollow plate welding machine, welding machine for plastic working characteristics:Not pale, not glue overflowFast-- eache welding time 0.1-3 seconds.Strength, can bear large pulling force, high pressure.Quality-- no water leakage, gas leakage, can close welding.Economy-- no screws, glue, ...