Hitachi Cable, Inc.

Kazumichi Kawai

Yasuhiko Miyake

Hideo Matsuo

Yoshinori Kishi

Yoshihiro Matsuyama

Yasuo Kaneko

Keizo Abe

Kelzo Abe

A method of fabricating composite metal wires such as aluminium clad steel wires is disclosed which comprises providing a core of hard metal with a cladding of soft metal by extrusion. In fabricating a composite metal wire by extrusion, a core is generally aligned, polished, cleaned or otherwise pretreated before entering an extruder so that a high and variable tension is imparted to the core. By avoiding such tension variation and maintaining the core under a constant low tension and by electrically heating the core before the core enters the extruder, a composite metal wire of improved quality is fabricated in a stable manner.

Fabrication of composite metal wire

A method of fabricating composite metal wires such as aluminium clad steel wires is disclosd which comprises providing a core of hard metal with a cladding of soft metal by extrusion. In fabricating a composite metal wire by extrusion, a core is generally aligned, polished, cleaned or otherwise pretreated before entering an extruder so that a high and variable tension is imparted to the core. By avoiding such tension variation and maintaining the core under a constant low tension and by electrically heating the core before the core enters the extruder, a composite metal wire of improved quality is fabricated in a stable manner.

Apparatus for fabricating composite metal wire

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Hitachi, Japan

Kazumichi Kawai