Apparatus for manufacturing slide fastener coil-shaped continuous element row

An apparatus for continuously manufacturing a slide fastener coil-shaped element row from a continuous monofilament, comprising:

• a forming screw assembly including a first and a second forming screws each having an upper ridged post, an intermediate neck, and a lower thread section wherein the second screw further comprises a second neck below the intermediate neck by a predetermined distance;
• a die assembly including a rectangular front die and a rectangular rear die, both dies being threadedly secured together each including two parallel half circular longitudinal grooves, a top half-neck between the grooves, and an elongate slot in the half-neck so that a combination of the grooves is capable of receiving the first and the second forming screws and a combination of the half-necks is capable of receiving a mandrel;
• an abutment assembly including a rectangular front abutment plate and a rectangular rear abutment plate, both plates being threadedly secured together wherein the front abutment plate has an inner longitudinal first trough sized to receive the front die, and an elongate first slot through the first trough;
• and the rear abutment plate has an inner longitudinal second trough sized to receive the rear die, and an elongate second slot through the second trough;
• a rear forming assembly including a block member threadedly secured to the rear abutment plate and including a top channel and two pairs of side adjustment screws at both sides, a central channel, and a rectangular opening in a front end of the central channel open to the outside;
• a shuttle assembly being received in the top channel and including a front cylindrical recess, a coil spring anchored in the cylindrical recess, a slanted piece extended from a mouth of the cylindrical recess, and an arcuate piece formed on an open end of the slanted piece, the shuttle assembly being defined in the top channel by a top cap which is threadedly secured to the block member;
• a rear cap threadedly secured to the block member and includes two apertures for receiving two rear adjustment screws which are engaged with the shuttle assembly;
• and a shaft mechanism including a front rectangular projection inserted through the central channel, the rectangular opening, the slot of the rear abutment plate, and the slot of the rear die to be proximate the mandrel, an intermediate cylindrical section of the shaft mechanism received in the central channel with a main spring put thereon, and a rear enlargement having two side flats;
• and
• an arcuate recessed portion formed on a side of the element by abutment of the arcuate piece of the shuttle assembly against the element.

An apparatus for continuously manufacturing a slide fastener coil-shaped element row from a continuous monofilament, comprising:

• a forming screw assembly including a first and a second forming screws each having an upper ridged post, an intermediate neck, and a lower thread section wherein the second screw further comprises a second neck below the intermediate neck by a predetermined distance;
• a die assembly including a rectangular front die and a rectangular rear die, both dies being threadedly secured together each including two parallel half circular longitudinal grooves, a top half-neck between the grooves, and an elongate slot in the half-neck so that a combination of the grooves is capable of receiving the first and the second forming screws and a combination of the half-necks is capable of receiving a mandrel;
• an abutment assembly including a rectangular front abutment plate and a rectangular rear abutment plate, both plates being threadedly secured together wherein the front abutment plate has an inner longitudinal first trough sized to receive the front die, and an elongate first slot through the first trough;
• and the rear abutment plate has an inner longitudinal second trough sized to receive the rear die, and an elongate second slot through the second trough;
• and
• a rear forming assembly including a block member threadedly secured to the rear abutment plate and including a bottom channels and at least a side adjustment screws at both sides, a bottom shuttle assemblies received in the bottom channel wherein the bottom shuttle assembly includes a front cylindrical recess, a second coil spring anchored in the cylindrical recess, a slanted piece extended from a mouth of the cylindrical recess, and a flat piece formed on an open end of the slanted piece, the bottom shuttle assembly being defined in the bottom channel by bottom cap which is threadedly secured to the block member;
• and a rear cap threadedly secured to the block member and includes a rear adjustment screw engaged with the bottom shuttle assembly;
• wherein a flat area is formed on bottom side of the element for increasing a friction when the flat piece of the bottom shuttle assembly is abutted on the element.

An apparatus for continuously manufacturing a slide fastener coil-shaped element row from a continuous monofilament, comprising:

• a forming screw assembly including a first and a second forming screws each having an upper ridged post, an intermediate neck, and a lower thread section wherein the second screw further comprises a second neck below the intermediate neck by a predetermined distance;
• a die assembly including a rectangular front die and a rectangular rear die, both dies being threadedly secured together each including two parallel half circular longitudinal grooves, a top half-neck between the grooves, and an elongate slot in the half-neck so that a combination of the grooves is capable of receiving the first and the second forming screws and a combination of the half-necks is capable of receiving a mandrel;
• an abutment assembly including a rectangular front abutment plate and a rectangular rear abutment plate, both plates being threadedly secured together wherein the front abutment plate has an inner longitudinal first trough sized to receive the front die, and an elongate first slot through the first trough;
• and the rear abutment plate has an inner longitudinal second trough sized to receive the rear die, and an elongate second slot through the second trough;
• a rear forming assembly including a block member threadedly secured to the rear abutment plate and including a top and a bottom channels and three pairs of side adjustment screws at both sides, a central channel, and a rectangular opening in a front end of the central channel open to the outside;
• top and bottom shuttle assemblies received in the top and the bottom channels respectively wherein the top shuttle assembly includes a front cylindrical recess, a first coil spring anchored in the cylindrical recess, a slanted piece extended from a mouth of the cylindrical recess, and an arcuate piece formed on an open end of the slanted piece and the bottom shuttle assembly includes a front cylindrical recess, a second coil spring anchored in the cylindrical recess, a slanted piece extended from a mouth of the cylindrical recess, and a flat piece formed on an open end of the slanted piece, the top and the bottom shuttle assembly being defined in the top and bottom channel by top and bottom caps respectively which are threadedly secured to the block member;
• a shaft mechanism including a front rectangular projection inserted through the central channel, the rectangular opening, the slot of the rear abutment plate, and the slot of the rear die to be proximate the mandrel, an intermediate cylindrical section of the shaft mechanism received in the central channel with a main spring put thereon, and a rear enlargement having two side flats;
• and a rear cap threadedly secured to the block member and includes three rear adjustment screws engaged with the shuttle assemblies and the shaft mechanism respectively;
• an arcuate recessed portion formed on a side of the element when the arcuate piece of the top shuttle assembly is abutted on the element;
• and
• a flat area formed on an other side of either element for increasing a friction when the flat piece of the bottom shuttle assembly is abutted on the element.