Method for making a ring-shaped mold

Details Method for making a ring-shaped mold Method for making a ring-shaped mold

1980-10-06

1983-10-25

Combs, Ervin M.

Metal tools and implements, making

Blank or process

Die

29416, B21K 520, B23P 1700

Patent

active

044111754

ABSTRACT:
A ring-shaped mold of the split mold type constructed by assembling into an annular shape a plurality of sectorial separate blocks formed by cutting a ring-shaped workpiece haveing a mold surface on the annular circumference thereof, and the method and apparatus for making the same are disclosed. Sector lines interfacing adjoining the separate blocks on the mold surface intersect the circumference of the ring-shaped mold at angles not perpendicular to said circumference.

REFERENCES:
patent: 404522 (1889-06-01), Ecaubert
patent: 514648 (1894-02-01), Ecaubert
patent: 2794351 (1957-06-01), Hawkinson
patent: 3186063 (1965-06-01), Dopp
patent: 3293950 (1966-12-01), Kern et al.
patent: 3999907 (1976-12-01), Pappas
patent: 4353785 (1982-10-01), Inoue

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