Waterproof slide fastener and apparatus for manufacturing the same

An apparatus for manufacturing a waterproof slide fastener, comprising a first mold which is movable in opening and closing directions of a mold assembly, a second mold which is fixed, and a third mold which is located between the first mold and the second mold, wherein

• the first and second molds have an insertion passage for a fastener tape having a through hole at a formation position of fastener elements and the first mold has a sprue, a runner, a gate, and the first and second molds have first and second cavities for molding upper and lower half portions of each fastener element along each element mounting edge portion of front and rear faces of the fastener tape,
• the first and second cavities have half portion molding cavities for a coupling head, a neck portion, a body portion, right and left shoulder portions and leg portions,
• the third mold is disposed between the half portion molding cavities for the coupling head in the first and second molds and has a gap for nipping a part of a terminal end of the element mounting edge portion of the fastener tape at an end portion thereof,
• each half portion molding cavity for the right and left shoulder portions and the leg portions has a thinner molding space than that of each half portion molding cavity for the neck portion and the body portion to be molded integrally on the element mounting edge portion of the fastener tape with half portions of the neck portion and the body portion, and
• each half portion molding cavity for each of the leg portions is composed of two or more cavities formed with a predetermined interval in length direction of the fastener tape.