US 11,725,318 B2
Method of forming an annular textile preform by needling a helical fiber sheet, and a machine for performing such a method
Hugues Leroy, Villeurbanne (FR)
Assigned to SAFRAN LANDING SYSTEMS, Velizy-Villacoublay (FR)
Filed by SAFRAN LANDING SYSTEMS, Velizy-Villacoublay (FR)
Filed on Nov. 16, 2021, as Appl. No. 17/455,129.
Application 17/455,129 is a division of application No. 16/110,143, filed on Aug. 23, 2018, granted, now 11,193,223.
Claims priority of application No. 17 58088 (FR), filed on Sep. 1, 2017.
Prior Publication US 2022/0074095 A1, Mar. 10, 2022
Int. Cl. D04H 18/02 (2012.01)
CPC D04H 18/02 (2013.01) [D10B 2505/02 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A circular needling machine, the machine comprising:
a horizontal sheet-forming turntable for forming a helical fiber sheet and driven at a constant and predefined speed of rotation NFS;
a horizontal intermediate turntable positioned under the sheet-forming turntable and driven at a speed of rotation NFI;
a horizontal intermediate unwinder positioned on the intermediate turntable and driven at a speed of rotation NDI;
a final horizontal unwinder positioned under the intermediate unwinder and driven at a speed of rotation NDF; and
a horizontal preform-forming turntable positioned under the final unwinder and driven at a variable and predefined speed of rotation NFP.