Abstract: A method of manufacturing elastic headphone wire, having steps of: manufacturing an elastic core wire, weaving the conductive layer around an outer surface of the elastic core wire, and manufacturing an elastic insulating protective layer which sleeves on a periphery of the conductive layer to form the elastic headphone wire. The elastic headphone wire has excellent flexibility and longer extension length, extending the service life, and broadening the use way of the headphone wire.

Abstract: A threaded reflective cord comprises a jacket and an inner cord; the inner cord comprising more than two stranded wires twisted helically and an cladding covered on the wire strands; wherein the cladding having an inner side thereof is embedded into a helical gap which is formed when the stranded wires are twisted helically; the helical gap forms and keeps an inward pre-tightening force on the stranded wires, the jacket and the inner cord having a reflective tape disposed therebetween, the reflective tape being spirally wounded on an outer side of the cladding; the jacket having an inner side thereof is coated on the cladding and embedded into a helical groove which is formed when the reflective tape is spirally wounded on the outer side of the cladding; the flexural resistance of the threaded reflective cord and the reflection performance are enhanced.

Abstract: A two-color spiral strip injection machine based on PLC control, comprising: a frame having a strip injection machine body, a motor, a PLC control box and a transmission mechanism, wherein the motor is connected to the strip injection machine body via the transmission mechanism; the strip injection machine body includes a cast aluminum heating cylinder, a core regulating lead screw; the core regulating lead screw includes a copper wire inlet, a head and a snout; the snout is connected to the transmission mechanism; the cast aluminum heating cylinder includes a head flange and a sizing inlet; the head includes a strip injection nozzle, the cast aluminum heating cylinder further includes a temperature sensor; the control box includes a PLC control program; the automated two-color strip injection is implemented by obtaining the real-time monitoring and feedback information of the temperature sensor.

Abstract: A threaded reflective cord comprises a jacket and an inner cord; the inner cord comprising more than two stranded wires twisted helically and an cladding covered on the wire strands; wherein the cladding having an inner side thereof is embedded into a helical gap which is formed when the stranded wires are twisted helically; the helical gap forms and keeps an inward pre-tightening force on the stranded wires, the jacket and the inner cord having a reflective tape disposed therebetween, the reflective tape being spirally wounded on an outer side of the cladding; the jacket having an inner side thereof is coated on the cladding and embedded into a helical groove which is formed when the reflective tape is spirally wounded on the outer side of the cladding; the flexural resistance of the threaded reflective cord and the reflection performance are enhanced.

Abstract: A method of manufacturing elastic headphone wire, comprising steps of manufacturing an elastic core wire; weaving a conductive layer: weaving the conductive layer around an outer surface of the elastic core wire; manufacturing an elastic insulating protective layer; the elastic insulating protective layer being sleeved on a periphery of the conductive layer to form the elastic headphone wire; the elastic headphone wire having excellent flexibility and longer extension length, extending the service life, and broadening the use way of the headphone wire.