CIRCULAR KNITTING MACHINE AND METHOD FOR MOVING THE NEEDLES OF A CIRCULAR KNITTING MACHINE

摘要

a circular knitting machine comprises a needle holding cylinder (2) which has a plurality of longitudinal grooves (4) which house a plurality of needles (3), at least one thread feed (110) operatively associated with the needles (3 ), the actuation cams (c) arranged around the needle holding cylinder (2) and movable in relation to the needle holding cylinder (2) around the central geometric axis (xx), a drive chain (5 ) for each needle (3) operatively placed between the respective needle (3) and the actuation cams (c). the drive chain (5) comprises: a sub-needle (6), a selector (9) that has a respective needle foot (37) that can be engaged in the respective selector paths, a selection device (200) that acts under the control over the selector (9), a perforator (7) equipped with a respective needle foot (25) that can be engaged in the respective perforator paths. taking as reference the drive chain (5) that rotates in relation to the actuation cams (c) around the central geometric axis (xx) in a direction of rotation (cw; ccw), the drill paths comprise a point rise loaded (101) and a failed sewing stitch rise (102) for each yarn feed (110). an entry of the failed stitch rise (102) circumferentially precedes an entry of the loaded stitch rise (101). the selector paths comprise a single rail (124) that defines a first rise (129) and a second rise (100) placed in succession one after the other for each wire feed (110). the first ascent (129) circumferentially precedes the second ascent (100) and is operatively associated with the ascent of failed stitching (102) and the second ascent (100) is operatively associated with the ascent of the loaded stitch (101).