Perforated braid with dual core yarns and braiding apparatus

A braiding apparatus for braiding a perforated braid comprises:

• a carrier guide plate (10) providing a pair of core yarn holes (12, 12′) at each center of each left half and right half thereof,
• a plurality of coupling holes (13, 13′) formed in radial direction around circumference of each core yarn hole (12, 12′) on said carrier guide plate (10),
• two tracks of carrier contours (14, 14′) formed in circular zigzag patterns with a certain depth along the circumferential coupling holes (13, 13′), said two tracks of carrier contours (14, 14′) forming inner and outer paths around said coupling holes (13, 13′) to cross each other,
• four square slots (15, 15′) perpendicularly arranged each other to form a cross center on time two tracks of the carrier contours (14, 14′) at a center of said carrier guide plate (10),
• a plurality of carriers (20) installed on said carrier contours (14, 14′) for rotating and traveling along said carrier contours (14, 14′),
• a base plate (40) disposed underneath said carrier guide plate (10) at a certain distance,
• a plurality of feed gears (30) rotatably mounted on said base plate (40), a number of said feed gears (30) being equal to the number of said carriers (20),
• a plurality of feed discs (31) fixed on top of feed gear shafts (32), and said feed discs (31) interposed into carrier bases (21) located at the lower part of said carriers (20),
• a pair of carrier contour changers (50, 50′) mounted underneath said carrier guide plate (10) and inserted into the four square slots (15, 15′) for operationally providing alternate tracks of said carrier contours (14, 14′) to cross and separate the carriers (20) at the cross center of said carrier contours (14, 14′), and
• a pair of actuators (42, 42′) mounted underneath said base plate (40) connected to said carrier contour changers (50, 50′) through an operating rod (41), a linkage (43) and a change rod (51), for repeatedly performing the crossing and separating operations.