THESE PROCESSES INCLUDE:
Ultrasonic welding uses a high frequency generator and a transducer to convert electrical energy into vertical pulses cycling at a rate from 15kHz to over 40kHz. These pulses transmit vertical vibration energy through tooling pressed down under pressure into two plastic part interfaces causing the thermoplastic resin to melt together forming an extremely strong bond. This process usually takes less than a second, followed by a short holding time before the two parts cool and solidify the weld area.
ULTRASONIC FOOD CUTTING
Ultrasonic food processing involves a vibrating knife producing a nearly frictionless surface which does not deform food products and to which they do not stick. The surface cleanly cuts or slits products including fillers such as nuts, raisins, dried fruit or chocolate morsels without displacement or plowing.
ULTRASONIC FILM & FABRIC PROCESSING
Ultrasonic energy can be used for cutting, slitting and welding, bonding, of film, fabrics and non-woven materials.
This process works through either linear or orbital motion of one part relative to the other. This results in surface friction that leads to heat generation and the formation of a melt layer at the joint. Vibration welding typically has weld times from one to five seconds. Dukane’s vibration welders can handle parts from approximately two-inch (50 mm) diameter to six feet (1800 mm) long.
LASER WELDING Laser welding is a non-contact joining method that uses a laser beam to melt the plastic in the joint area by delivering a controlled amount of energy to a precise location. Precision in controlling the heat input is based on the ease of adjusting the laser beam size and the range of methods available for positioning the beam. Most thermoplastics can be welded using a proper laser source and appropriate joint design.
SPIN WELDING This process works through rotational motion of one-part relative to the other. This results in surface friction that leads to heat generation and the formation of a melt layer at the joint. Spin welding typically has weld times from one-half to five seconds. Dukane’s spin welders can handle parts from approximately one-half inch (12 mm) diameter using high speed motors up to nine inches (225 mm) diameter using high torque motors.
INFRARED WELDING Another non-contact welding method is infrared welding that uses radiation to transfer heat to the plastic parts. It follows the same fundamental steps as hot plate welding. Two different approaches to infrared welding have emerged. One of the systems uses an electrically heated metal plate which, in some cases, is coated with a ceramic. In the other system, the standard heater plate is replaced with infrared emitters clamped and spring-loaded on either side of a movable platen.
HOT PLATE WELDING In this process, the facing surfaces of the two parts are heated through conduction, convection and/or radiation from an actual heated platen. The two parts are either pressed against the hot plate, or held next to it for some period of time, then the hot plate is removed and the parts are pressed together to form the weld. Hot Plate welding typically has weld times from ten to twenty seconds. Dukane’s hot plate welders can handle parts from approximately one inch (25 mm) diameter up to five feet (1500 mm) long.