US 12,122,069 B2
Method for impregnating a fibrous preform using a seal, and a method for manufacturing a matrix reinforced by a fibrous preform
Hubert Jean Marie Fabre, Moissy-cramayel (FR); Nicolas Cambyse Ashtari, Moissy-cramayel (FR); Raoul Jaussaud, Moissy-cramayel (FR); and Marc-Emmanuel Jean François Techer, Moissy-cramayel (FR)
Assigned to SAFRAN AIRCRAFT ENGINES, Paris (FR)
Appl. No. 16/317,270
Filed by Safran Aircraft Engines, Paris (FR)
PCT Filed Jul. 13, 2017, PCT No. PCT/FR2017/051924
§ 371(c)(1), (2) Date Jan. 11, 2019,
PCT Pub. No. WO2018/011526, PCT Pub. Date Jan. 18, 2018.
Claims priority of application No. 1656714 (FR), filed on Jul. 13, 2016.
Prior Publication US 2019/0232530 A1, Aug. 1, 2019
Int. Cl. B29C 70/48 (2006.01); B29C 33/00 (2006.01); B29C 70/54 (2006.01)
CPC B29C 33/0038 (2013.01) [B29C 70/48 (2013.01); B29C 70/545 (2013.01); B29C 70/546 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method for impregnating a fibrous preform by injection or infusion, comprising the steps of:
providing a mold having at least two portions, said mold presenting at least one inlet orifice and at least one vent orifice placed on opposite sides of the mold;
placing a fibrous preform in a portion of the mold;
placing at least one seal in at least one passage formed between an inside wall of the mold and the fibrous preform, said passage extending substantially along the direction extending between the opposite sides of the mold and respectively presenting the inlet orifice and the vent orifice, wherein the seal presents a cross-section consisting exclusively of a U-shape, and wherein the passage is a first passage and the at least one seal includes a first seal and a second seal;
placing the second seal in a second passage extending substantially along the direction extending between the opposite sides of the mold;
closing the mold so that the two portions of the mold co-operate with the seal in such a manner as to shut off said passage; and
impregnating the fibrous preform with an impregnation material.