Method of manufacturing extruded seamless hollow materials
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United States of America Patent
Stats
-
Nov 6, 1990
Issued Date -
N/A
app pub date -
Oct 17, 1989
filing date -
Jun 27, 1987
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method of manufacturing extruded seamless hollow materials characterized in that, prior to extruding a hollow billet from container liner through extrusion dies, a process wherein a centering jig for holding the tip portion of mandrel at the center of extrusion is provided on the extruding side or in the extrusion dies on the extruding side of the container liner, a process wherein the tip portion of mandrel is inserted into the centering jig to be held and a process wherein the hollow billet is pressurized to fill up said billet in the container liner are included.
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