The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 19, 1988
Filed:
Apr. 29, 1987
Susumu Nawata, Shimizu, JP;
Katsuzo Ichikawa, Fujinomiya, JP;
Eikichi Sagisaka, Shimizu, JP;
Masaharu Sugiyama, Numazu, JP;
Nippon Light Metal Co., Ltd., Tokyo, JP;
Abstract
The apparatus comprises an annular water-cooled metallic mold having open upper and lower ends, a core member located in the inner space of the mold to form therebetween an annular casting passage for solidifying therein the molten metal supplied in the casting passage, and a movable supporting base member adapted to initially close the lower end of the casting passage to support the molten metal therein and then to be moved downwardly apart from the lower end as the metal in the casting passage solidifies so as to permit the solidified metal to be pulled out from the casting passage for continuously producing the hollow metallic ingot. The core member comprises a heat-insulating member having a molten metal receiving vessel mounted thereon with at least one molten metal conducting passage formed therein communicating with the casting passage so as to supply the molten metal from the vessel to the casting passage, and a casting member made of graphite or a carbonic material and secured to the lower side of the heat-insulating member with the outer peripheral surface being tapered downwardly inwardly to form a casting face.