Compression molded composite guitar soundboard

Details Compression molded composite guitar soundboard Compression molded composite guitar soundboard

1993-03-08

1994-08-02

Shoop, Jr., William M.

Music

Instruments

Stringed

84452P, 84192, 84193, 264257, 156245, 156330, B29C 4318, B29C 6714, G10D 102, G10D 108

Patent

active

053335279

ABSTRACT:
An improved acoustic guitar soundboard comprising a composite sheet formed of multiple layers of epoxy impregnated graphite fibers which have been accurately preimpregnated at about 33% resin to 67% fiber, after which they are layed up in laminates of unidirectional fibers with a woven graphite fiber fabric located as both top and bottom surfaces. The fiber orientation is preferably three to four times as many fibers in the longitudinal direction as in the latitudinal direction. The layups also are always equal and opposite in layered sequence so as to eliminate uneven stress. The sheet is cured in a heated platen press at uniform pressure and temperature. The soundboard may also have either standard wood bracing, rib-like bracing or no bracing at all. The waves applied in radial orientation enhance vibration, while orienting the waves into surrounds for individual sound plates tend to create individual resonance reservoirs for specific sound frequencies. Also, the soundboard can be molded with all finished machine dimensions in place in order to reduce manufacturing costs.

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