Process for producing a laminated tubular fibrous structure for

Details Process for producing a laminated tubular fibrous structure for Process for producing a laminated tubular fibrous structure for

1988-09-28

1991-01-22

Lewis, Michael L.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156204, 156474, 156195, B65H 8100

Patent

active

049868632

ABSTRACT:
A laminated tubular fibrous structure is produced using a tubular braid and folding over its wall in order to form corrugations or wrinkles superposed in axial direction. The tubular braid is brought over a mandrel of which the inner diameter corresponds to that of the structure to be produced, by causing the braid to pass around a forming head which is mounted on the mandrel and of which the outer diameter corresponds to that of the structure to be produced, and at least one yarn is wound following a helicoidal path on the braid, around the mandrel and at the front of the forming head, between said head and a counter-piece of which the faces in facing relationship have shapes corresponding to the shape of the wrinkles to be produced, the winding of the yarn being performed while the forming head is moving away from the counter-piece progressively with the formation of the wrinkles. The structure is particularly suitable for use as reinforcing structure for producing pieces in composite material, such as ablative thermal protections for solid propellant rocket motors.

REFERENCES:
patent: 1009365 (1911-11-01), Wirt
patent: 1932809 (1933-10-01), Wheeler
patent: 2688906 (1954-09-01), Dokopil
patent: 2743759 (1956-05-01), Snow et al.
patent: 2950152 (1960-08-01), Garceau
patent: 2991509 (1961-07-01), Brophy
patent: 3023787 (1962-03-01), Phillips et al.
patent: 4708756 (1987-11-01), Busen et al.

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