Title: Method for producing extruded structural profiles from scrap materials of aluminum based metal

Abstract: Method for producing extruded structural profiles from aluminum or aluminum alloy scrap materials. The scrap materials are compacted under room temperature or under heat suitable for hot extrusion into a cylindrical body which is of such a dimension that is suitable for insertion into an extruder. The compacted body has an average density which is 70 to 86 percent of that of aluminum, and includes longitudinal air passages. Suction pressure is applied to the interior of the extruder during extruding process for removing air entrapped in the body, which may otherwise cause voids in the extruded products.

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Inventors: Takahashi, Toshiro (Shizuoka, JA)
Nagano, Toshihiro (Shizuoka, JA)
Nakamura, Katsuhiko (Shizuoka, JA)
Kikuchi, Masaru (Fuji, JA)
Suzuki, Kazuo (Shizuoka, JA)

Application Number: 590289
Filing Date: 1975-06-25
Publication_date: 1977-07-05
Assignee: Riken Keikinzoku Kogyo Kabushiki Kaisha (Shizuoka, JA)
Primary Class(es): 29/403.2 29/419.1, 29/DIG47, 72/253.1, 72/256
Other Classes:
US Patent Ref:

2211984	Aug, 1940	Paterson	29/403.
2358667	Sep, 1944	Stern	29/403.
2391752	Dec, 1945	Stern	29/403.
3394213	Jul, 1968	Roberts et al.	29/419.
3523354	Aug, 1970	Loewenstein	29/419.
3626578	Dec, 1971	Price et al.	29/403.
3629929	Dec, 1971	Wessel	29/420.
3701190	Oct, 1972	Ston, Jr.	29/419.
3757410	Sep, 1973	Roberts	29/420.
3894677	Jul, 1975	La Iacona	29/419.

Other Refs: 1,066,9771,927,225

Oct, 1959	DT
Dec, 1969	DT

Primary Examiner: Larson, Lowell A.
Assistant Examiner: Crane, Daniel C.
Attorney: Finnegan, Henderson, Farabow & Garrett