| 摘要 |
A molded metal object is manufactured in that one or more tubes and/or shells are prefabricated, which tubes and/or shells are intended to form channels and cavities, respectively, in the metal object. The tube or shell can be produced by thermal spraying of a thin layer (2) of a high temperature and corrosion resistant metal alloy onto a core body (1). The core body (1), e.g. consisting of sand, is removed, whereupon a thicker layer (3) is sprayed thereon. Thereafter, the tube (2, 3) or shell is mounted into a tool for making a sand mould. When making the latter, the tube (2, 3) or shell is also filled with sand, whereupon the desired metal object is molded and the sand is removed. |
