Acoustic window and method for making the same

Details Acoustic window and method for making the same Acoustic window and method for making the same

1995-06-29

1997-09-23

Ahmad, Nasser

Stock material or miscellaneous articles

Structurally defined web or sheet

Including fastener for attaching to external surface

264102, 2643281, 2643288, 26432813, 367173, 367174, 428 68, 428 69, 428 76, 4284231, B29C 4500, B32B 306

Patent

active

056702337

ABSTRACT:
A method for making polyurethane acoustic windows. A molding material is lied to a reservoir connected to the bottom of the mold to fill the mold under the influence of a vacuum applied at the top of the mold. After initialling filling the mold, a second reservoir connects to the vacuum port and additional material is added to the first reservoir to partially fill the second reservoir. Thereafter the mold with the reservoirs attached is located in a pressure oven for curing. After curing the mold an acoustic window is removed from the mold for post molding operations.

REFERENCES:
patent: 4412804 (1983-11-01), Huther
patent: 5276658 (1994-01-01), Bullat

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