Method of making a finned cast recuperator tube
US4574865A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Nov 5, 1984 |
| Grant date | Mar 11, 1986 |
| Priority date | — |
| Expiry date | Nov 5, 2004 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22D19/0063
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A hollow metallic envelope 10 of a finned cast recuperator tube is cast with preformed interior fins 12 and exterior fins 16 integral therewith. A sand core 30 is formed about the preformed interior fins 12 with portions of the fins 12 protruding outwardly from the sand core, and a sand mold 40 is formed to a cavity for receiving the sand core 30 with the preformed exterior fins 16 embedded in the sand mold with portions of the fins 16 protruding therefrom into the cavity. The sand core 30 is placed into the sand mold 40 in spaced relationship therewith so as to provide a clearance space 50 between the sand core 30 and sand mold 40 into which the portions of the interior fins 12 and exterior fins 16 extend. Molten metal is poured into the space 50 which upon cooling solidifies to form the envelope 10 with the interior fins 12 and exterior fins 16 fused integrally therewith.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.