Ultrasonic Welding Plastic

An energy director is a raised region with a triangular cross section.

Ultrasonic welding plastic.

Ultrasonic welders branson dukane models and tooling for plastics joining clam shell sealing staking insertion degating film sealing corrugated welding. Ultrasonic welding is an industrial process whereby high frequency ultrasonic acoustic vibrations are locally applied to workpieces being held together under pressure to create a solid state weld it is commonly used for plastics and metals and especially for joining dissimilar materials in ultrasonic welding there are no connective bolts nails soldering materials or adhesives necessary to. The friction between the molecules heats and melts the plastic. Ultrasonic welding uses high frequency vibration to melt and weld plastic.

Ultrasonic welding of plastic materials creates a molecular bond within the weld seam. Ultrasonic energy has been used to join thermoplastics for over 70 years. When combined with pressure friction produces heat melts the parts at the horn contact point. The process of ultrasonic welding of plastics is achieved by applying a vibrating metal tool horn at 90 to the stationery plastic parts which then vibrate.

It is frequently chosen when parts are too complex or expensive to be molded in one piece in ultrasonic plastic welding a vibratory motion at the horn face amplitude is transferred to the part. Longitudinal vibrations in frequencies of 20 khz 30 khz and 35 khz with tool amplitudes between 5 µm and 50 µm are introduced into the plastic materials under the action of force. Ultrasonic plastic welding is the joining or reforming of thermoplastics through the use of heat generated from high frequency mechanical motion. It is accomplished by converting high frequency electrical energy into high frequency mechanical motion.

Welding of plastics using ultrasonics. Ultrasonic welding of plastics material suitability guide. A tool vibrates at ultrasonic frequencies and causes concentrated molecular vibration in the weld joint. This means incorporating an energy director into your ultrasonic welding plastic design.

In ultrasonic welding it s important to focus the energy in as small a region as possible.