Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1995-10-13
1998-08-04
Smith, Scott A.
Metal founding
Process
Shaping liquid metal against a forming surface
164900, 164120, B22D 1700, B22D 2300
Patent
active
057879613
ABSTRACT:
In carrying out of a thixocasting process, a material in a semi-molten state is produced by heating an aluminum alloy material which has a thermal characteristic that a first angled endothermic section generated by the melting of a eutectic crystal and a second angled endothermic section generated by the melting of a component having a melting point higher than a eutectic point exist in a differential calorimetric curve. A start point of a primary pressing stage is established at a point when the temperature T of the material is in a range of T.sub.1 <T.ltoreq.T.sub.4 in the relationship between the temperature T.sub.1 of a rise-start point in the first angled endothermic section and the temperature T.sub.4 of a peak of the second angled endothermic section. At the primary pressing stage, the charging of the material into the cavity in a casting mold is completed. A start point of a secondary pressing stage is established at a point when the temperature T of the material is in a range of T.sub.1 <T.ltoreq.T.sub.3 in the relationship between the temperature T.sub.1 of the rise-start point in the first angled endothermic section and the temperature T.sub.3 of a drop-end point in the first angled endothermic section. At the secondary pressing stage, the material is solidified.
REFERENCES:
patent: 4726414 (1988-02-01), Merrien
patent: 4844146 (1989-07-01), Kikuchi
patent: 4846252 (1989-07-01), Sato et al.
patent: 4889177 (1989-12-01), Charbonnier et al.
patent: 5392842 (1995-02-01), Volpe
patent: 5394931 (1995-03-01), Shiina et al.
patent: 5531261 (1996-07-01), Yoshida et al.
Excerpt from GeiBerei-Praxis, Dipl.-Ing. Ernst Brunhuber, Fachverlag Schiele & Schon, GmbH, Berlin, "Vergieben teilweise erstarrter Matalle"(1974).
Giesserei 77, 1990, No. 19 - 17th Sep., Hans-Peter Erz, Frankfurt, "Thixocasting--a casting process for near-net-shape production" (1990).
Excerpt from Aluminium, No. 71, 1995, 4 Chr. Ditzler, Singen "Thixoforming--Aluminiumbauteile mit hoher Beanspruchbarkeit und komplexer Gestalt, Teil I".
Excerpt from Giesserei 81 (1994) No. 11, 6th Jun. H. Kaufmann, Ranshofen, "Endabmessungsnahes GieBen: Ein Vergleich von Squeeze-casting und Thixocasting".
Article, "VergieBen teilweise erstarrter Metalle" (Oct. 1974).
Article, "Thixocasting--ein Giebverfahren zur Near-net-shape-Produktion" (Sep. 1970).
Article, "Thixoforming--Aluminiumbauteile mit hoher Beanspruchbarkeit und Komplexer Gestalt, Teil I" (1995).
Article, "Endabmessungsnahes GieBen: Ein Vergleich Von Squeeze-casting und Thioxcasting" (1994).
Kikawa Kazuo
Nakamura Takeyoshi
Saito Nobuhiro
Sugawara Takeshi
Honda Giken Kogyo Kabushiki Kaisha
Lin I.-H.
Smith Scott A.
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