Twisted wire manufacturing apparatus and concentric twisted wire manufacturing machine

摘要

A twisted wire manufacturing apparatus is provided with cradle (6) which is suspended at a pair of rotating shafts (3,4) having extreme ends opposed to each other through bearings (5). A main body (9) of the wire twisting machine is mounted on the cradle (6). A raw material guide (10) and a twisted wire guide (11) are mounted in respect to a pair of rotating shafts (3,4) having axial insertion holes (28,31). The raw material drawing capstan (13,13') and the twisted wire take-up capstan (14) are mounted on the cradle (6). The raw wire material (12) is guided through these devices. Another twisted wire manufacturing machine has a plurality of injection dies (61,63) communicating with an annular groove (75) formed in the rotary head (64). An annular shoe for gradually reducing a sectional area of the annular groove (75) is slidably fitted to the annular groove (75). The raw material is supplied into the annular groove (75) and the raw wires (70,72) are injected from the injection dies (61,63). One injection die (63) of a plurality of injection dies (61,63) is provided with means (78,79,80) for increasing an injection resistance of the raw wires. An injection speed of the core raw wire (70) injected from one injection die (63) is made slower than that of outer layer raw wires (72) injected from other injection dies (61).