US4040162A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of producing composite extruded aluminum products from aluminum swarf
Assignee: Aisin Corp
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Filing: 1975-10-03
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Granted: 1977-08-09
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Expires: 1995-10-03
Abstract
Abstract Particulate aluminum or aluminum alloy swarf or waste is compressed under heat and pressure to form a billet. After subjecting the billet to a subsequent heat treatment at a higher temperature the billets are capable of being extruded by conventional extrusion apparatus. A conventional preheated billet of cast aluminum or aluminum alloy can be placed in the extrusion apparatus between the die plate and the preheated billet of aluminum or aluminum alloy swarf so that upon extrusion through the die orifice the compressed swarf billet and the conventional billet will comprise the core and coating portions of the product respectively.
Inventors
- 👤 Mitsuyuki Isogai
- 👤 Kouiti Tikusa
- 👤 Yosihiko Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 02:25
CPC Classifications
B; B22; B22F; B22F7/00; B22F7/06; B22F7/08; B21; B21C; B21C23/00; B21C23/002; B21C23/22; B22F3/00; B22F3/20; B22F8/00; B22F2003/206; B22F2998/00; B22F2998/10; Y; Y02; Y02P; Y02P10/00; Y02P10/20; Y02W; Y02W30/00; Y02W30/50; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49751; Y10T29/49753
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
134 words
A method of extruding composite products having a core and an external sheath comprising heating a die plate, pressure plate and an extrusion container at a constant temperature, compressing aluminum swarf into a billet having a bulk specific gravity of 1.4 to 201 preheating a billet of cast aluminum and said billet of compressed aluminum swarf to a temperature higher than the temperature of said die plate, pressure plate and extrusion container, placing said billet of cast aluminum in said container adjacent said die plate and placing said billet of compressed aluminum swarf between said billet of cast aluminum and said pressure plate, and forcing said billets through an extrusion orifice in said die plate to form an elongated extrusion having a core of said aluminum swarf and a covering of said cast aluminum.
Claim 2
Independent Claim
134 words
A method of extruding composite products having a core and an external sheath comprising heating a die plate, pressure plate and an extrusion container at a constant temperature, compressing aluminum swarf into a billet having a bulk specific gravity of 1.4 to 201 preheating a billet of cast aluminum and said billet of compressed aluminum swarf to a temperature higher than the temperature of said die plate, pressure plate and extrusion container, placing said billet of cast aluminum in said container adjacent said die plate and placing said billet of compressed aluminum swarf between said billet of cast aluminum and said pressure plate, and forcing said billets through an extrusion orifice in said die plate to form an elongated extrusion having a core of said aluminum swarf and a covering of said cast aluminum.
Claim 3
Dependent Claim
28 words
A method as set forth in claim 1 wherein said die plate and extrusion container are heated to 400° C. and said billets are preheated to 450° C.
Claim 4
Dependent Claim
22 words
A method as set forth in claim 1 wherein said billets are preheated to a temperature of 400° C. to 550° C.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-08 | 1981-02-07 | 1981-08-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-08 | 1985-02-07 | 1985-08-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-08 | 1989-02-07 | 1989-08-09 | $7700.00 | Window Closed / Lapsed |