Patent ID: 11970978
Assignee: ROHR, INC.
Field: Surface technology, coating (Chemistry)
Classification: CPC B  F  Y | IPC F

Claim 6:
7. A method for forming an acoustic panel, the method comprising:
providing a front skin and a back skin, the front skin and the back skin defining a transition portion of the acoustic panel, the front skin separated from the back skin by a distance and the distance is inconsistent within the transition portion along a span of the transition portion from a first transition portion end to a second transition portion end;
assembling the acoustic panel by positioning a core between the front skin and the back skin, the core including:
at least one primary core portion comprising a honeycomb structure defining a plurality of cavities extending from the front skin to the back skin; and
a secondary core portion external to the at least one primary core portion and comprising a foam structure extending from the front skin to the back skin, the secondary core portion is disposed within the transition portion, the foam structure comprising a syntactic foam contacting the front skin, the back skin, and the at least one primary core portion;

simultaneously curing the front skin and the back skin subsequent to assembling the acoustic panel; and
perforating a perforated skin portion of the front skin to form a plurality of apertures subsequent to simultaneously curing the front skin, the back skin, and the secondary core portion, the perforated skin portion coincident with the primary core portion;
wherein the front skin further comprises an imperforate skin portion coincident with the secondary core portion.