D - Textiles – Paper – 04 – H
Patent
D - Textiles, Paper
04
H
D04H 18/00 (2006.01)
Patent
CA 2449666
A needled fiber structure (P) is made by stacking fiber plies on a platen (100), by needling the plies as the stack of plies is built up by means of needles (114) driven with reciprocating motion in a direction that extends transversely relative to the plies, and by varying the distance between the platen and an end-of--stroke position of the needles while building up the stack so as to obtain a desired distribution of needling characteristics through the thickness of the fiber structure. The instantaneous force (f) exerted during needle penetration is measured (sensors 108) and a magnitude representative of needling force (F) or penetration energy (E) is evaluated on the basis of the instantaneous force, and the evaluated magnitude (F; E) is verified for compliance with at least one predetermined condition to monitor proper operation of the process or to act on the way the distance between the platen and the end-of-stroke position of the needles is varied.
Une structure fibreuse aiguilletee (P) est realisee par empilement de strates fibreuses sur un plateau (100), aiguilletage des 5 strates au fur et a mesure de leur empilement au moyen d'aiguilles (114) animees d'un mouvement alternatif en direction transversale par rapport aux strates, et variation de la distance separant le plateau d'une position de fin de course des aiguilles, pendant la realisation de l'empilement afin d'obtenir une distribution souhaitee des caracteristiques d'aiguilletage dans l'epaisseur de la structure fibreuse. On mesure (capteurs 108) I'effort instantane (f) exerce lors de la penetration des aiguilles, pour evaluer une grandeur representant un effort d'aiguilletage (F) ou une energie de penetration (E) a partir de I'effort instantane, et on verifie que la grandeur (F ; E) evaluee satisfait au moins une condition predeterminee pour controler le bon deroulement du procede ou agir sur la variation de la distance entre le plateau et une position de fin de course des aiguilles.
Duval Renaud
Jean Robert
Marjollet Thierry
Messier-Bugatti
Sim & Mcburney
LandOfFree
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