| 摘要 |
<p>PURPOSE:To increase the concentricity of an insulation cable largely by providing an electromagnetic coil close to an exit of an extruder, and supplying a current to a cable to be the conductor of the insulation cable for forming magnetic fields opposite to each other. CONSTITUTION:A pressure is given to an insulation body preliminarily moulded on a conductor (core wire) supplied from a supplier 1 for extruding and coating, and solvent used in preliminary moulding is dried 7. The insulation body is then sintered 8, and taken as a completed product 10. A supply side of the conductor (core wire) is then connected with a DC power supply 3 on the low potential side, and a DC current is supplied 2 to the supply side. The DC current is supplied 2 to an electromagnetic coil in a master die 4 similarly. A nipple 5 in the die 4 is self-held close to the center constantly by a remote force by the opposite magnetic fields by the magnetic field formed by the conductor (core wire) close to the nipple 5 and the electromagnetic coil in the die 4. Displacement of the nipple off the center of an extrusion line can thus be restricted forcedly, and the concentricity of the insulation cable can be improved largely.</p> |
