OVAL CROSS SECTION METAL TUBE PRODUCING DEVICE AND PRODUCING METHOD

Title:

OVAL CROSS SECTION METAL TUBE PRODUCING DEVICE AND PRODUCING METHOD

Document Type and Number:

WIPO Patent Application WO/2004/011167

Kind Code:

A1

Abstract:

It is intended to attain the widening of the range of applications and the enhancement of added value of metal tubes, etc., by obtaining an aluminum tube of oval cross section that has never existed before. To this end, a disk-like metal slag (21) is impact-extruded by a structurally optimum-designed mold (13, 14) to thereby mold a metal tube (T) having a mouth, shoulder and oval cross section barrel formed integral. And the skirt of the oval cross section barrel of the molded tube (T) is once shaped into a perfect circle by utilizing the principle of work hardening of metal and then it is subjected to trimming by lathing.

Inventors:

MAEDA YUJI (JP)
MIYOSHI SIGETOMI (JP)
YAMAGUCHI TAKAHIRO (JP)

Application Number:

PCT/JP2003/009419

Publication Date:

February 05, 2004

Filing Date:

July 25, 2003

Export Citation:

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Assignee:

TAISEI KAKO CO (JP)
MAEDA YUJI (JP)
MIYOSHI SIGETOMI (JP)
YAMAGUCHI TAKAHIRO (JP)

International Classes:

B65D35/06; B21C23/00; B21C23/08; B21C23/18; B21C23/21; B21C25/02; B21J5/06; B21K21/04; B30B5/00; (IPC1-7): B21C23/18

Foreign References:

JPH0265447U

1990-05-17

Other References: