SEALING DEVICE USING SURFACE WELDING OF THERMOPLASTIC MATERIAL OR COATING SURFACES OPPOSED TO EACH OTHER AND USE OF GIANT MAGNETROSTRICTIVE POWDER COMPOSITE FOR THIS PURPOSE

摘要

PURPOSE: To provide a small-sized and lightweight ultrasonic sealing apparatus of a packing container of a thermoplastic material excellent in properties capable being easily produced and easily moving so as to be engaged with an object to be sealed. CONSTITUTION: An ultrasonic sealing apparatus for producing a packing container of a thermoplastic material includes a vibration generator 2 of the so- called giant magnetostriction powder composite(GMPC) and the vibration generator is fixed to a sealing jaw 4 and has a cross-sectional area gradually reduced from the fixing point to the jaw and the free surface 5 of the end part thereof is formed into a narrow surface. A coil 3 generating a magnetic field is wound around the vibration generator 2.