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Print ram actuators (Fig. 1) comprise magnetizable bars 1 in a ram 2 which are pulled into the operating gaps 3 of an electromagnet 4.
English (United States)
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Cavity Armature for Electromagnetic Actuators
Print ram actuators (Fig. 1) comprise magnetizable bars 1 in a ram 2 which
are pulled into the operating gaps 3 of an electromagnet 4.
Bars 1 in ram 2 may be isolated from each other by non-magnetizable
material or be interconnected by thin bridges 5 of the same material as the bars,
filling the interstices with non-magnetizable mate rial 6.
A cavity armature (Fig. 2) permits the ram to have a continuous smooth
surface without any abutting edges 7. Bars 1 in Fig. 1 correspond to those
designated as 1' in Fig. 2. In this case, too, the interstices may be filled with non-
magnetizable, e.g., plastic, material.
For producing such cavity armatures (Fig. 3), two complementary component
halves 8 and 9 are welded together.
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