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A method is described which maintains the effects of the electro/ magnetic shielding while providing air passages.
English (United States)
This text was extracted from a PDF file.
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Emi Shielded Vents in Reaction Injection Medium Covers
A method is described which maintains the effects of the electro/ magnetic
shielding while providing air passages.
Holes for vents and wires in covers can be molded in place with the use of
rubber inserts in the mold. The inserts rest against the shielding medium,
preventing the Reaction Injection Medium from reaching that particular area.
This can be accomplished on one side or both for a through hole. The shape of
rubber or soft insert material will be sized to the particular job. I have used
rubber inserts of various shapes, none of which hindered material flow. Holes
can be molded to a surface or through that surface.
The final finish of a part can also be applied into a properly prepared mold,
then the Reaction Injection Medium is injected over it. Upon curing both the finish
and the cured Reaction Injection Medium should come from the mold as one part
ready for use. Thus far, this technique has been tried with a low oxidizing
conductive copper paint, shale gray paint, and vinyl sheet material with very