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Legacy Welder Models

Legacy Welder Models SEDECO and Seidensha have offered numerous models of plastic welding equipment over the nearly 60-year history of our business. In our effort to remain at the forefront of plastic welding technology and provide the most up-to-date offerings to our customers, some lines and models of welder have been discontinued to pave the way for future technological innovation. Some welder models and spare parts are available on a limited basis; please contact us for inquiries into ava ...

Sigma 630E

While the 303S is an excellent machine, it falls short in assuring complete qualtiy control on the production line. In response to several customer suggestions, Seidensha developed the SIGMA 630 portable welder. As with its sister SIGMA series machines, the 630 is equipped with Time, Amplitude, and Energy control funcitons which can be easily accessed via the LCD screen on the face of the unit. Superior Quality Control ...

Sigma 600 Series

The SIGMA 600 series was specially designed to be used on thin, flimsy parts that may otherwise to too weak to be used on the traditional SIGMA Series Presses. The SIGMA 600 series offers a range of frequencies to better fit your parts production needs, and the SIGMA 600 Series generators and the SIGMA P-30 press come in the high end "S" class and economical "B" class. ...

Other Technology

Other Technology SEDECO offers other plastic welding technologies aside from those previously listed, including but not limited to: Spin Welders, Impulse Welders, and Contact-less Hot Plate welders. Spin Welder The spin welder applies a load onto two workpieces to be welded together and rotates one of the workpieces in horizontal direction at high speed to weld them together by the frictional heat generated on the welded portion. Circular workpieces can be welded with high strength ...