Circular braiding machine operating on high speed branding principle

摘要

Circular braiding machine with a rotational axis (1), containing one group each of inner and outer spools (31,38) arranged on a circular path coaxial with the rotational axis (1). Each carries: one strand (32,37); a drive means for moving the groups of spools in opposing directions; strand guide members (48) to guide the strands (37) of one of the groups of spools (38) at a point between the latter and a braiding point; a means for crossing the strands (32,37) of the inner and outer spools (31,38). These means having levers working synchronously with the drive means and coupled with the strand guide members (48). The strand guide members (48) are mounted to move backwards and forwards on linear or curved guideways (78). Essentially constant distances are maintained from the braiding point; and at least one strand guide member (48) coupled with a lever (73) which is under the control of a gear mechanism. The gear mechanism has a crank (69) and creates a superimposed sinusoidal movement of such a kind that the angular velocity of the crank (69) is smaller in the regions corresponding to reversal points of the guideway and greater in the regions lying in between, than corresponds to a purely sinusoidal movement. The gear mechanism is elliptical.