METHOD FOR MANUFACTURING OF NEEDLE STITCHED FIBROUS STRUCTURES IN REAL TIME MODE AND NEEDLE STITCHING APPARATUS FOR EFFECTUATING THE SAME Russian patent published in 2006 - IPC D04H18/00 

FIELD: production of fibrous structures for manufacturing of carcasses by needle stitching process, in particular, reinforcement structures for articles made from composite materials, such as brake disk carcasses.

SUBSTANCE: method involves laying fibrous layers onto one another on supporting plate; stitching said layers as these layers are applied onto one another by means of needles driven for reciprocation in direction traverse to said layers; changing distance separating said supporting plate from position corresponding to end of needle stroke in the process of applying said layers for producing of desired distribution of needle-stitching characteristics through the thickness of fibrous structure; measuring by means of sensors instantaneous force f transmitted during needle-stitching process for finding value representing needle stitching force F or stitching energy E based on instantaneous force value; controlling values F, E found. Apparatus is described in Specifications.

EFFECT: provision for determining actual efficiency of needles during the entire needle stitching process in order to provide for controlling or regulating the process in real time mode.

16 cl, 8 dwg