Solder jetting process

In addition to the deformation modes described above, there are some other modes of practical interest, for example, the cyclic spreading, recoiling, and oscillation mode typical of solder jetting process.[5°1 This mode leads to a final splat shape of multiple surface ripples at low substrate temperatures and hemispherical shape without surface ripples at high substrate temperatures. 

Another variation is to use a thin air jet around a process or an opening to a pt(x ess. For welding or soldering on a table, a circular tube with supply holes in the upper side could be used. The circular tulw is placed around a fixed welding (soldering) place and blow s upward around the welding point into a basic opening hood. 

At the present time the applications of polyimides include compressor seals in jet engines, sleeves, bearings, pressure discs, sliding and guide rolls, and friction elements in data processing equipment, valve shafts in shutoff valves, and parts in soldering and welding equipment. 

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