PUNCHEON FOR MOLDING OF SHELLS

FIELD: technological processes. ^ SUBSTANCE: puncheon contains holder in the form of truncated pyramid with even number of facets and sections. Every section has external shape-generating surface. This surface follows part of internal surface of part. Odd sections have isosceles trapeziform cross section. Even sections are arranged with cross section in the form of segment. Length of segment chord is equal to sum of lengths of two side walls of cross section of neighbouring section and width of even facet of holder at the same distance from one of the ends of section and holder accordingly. Even sections contact with side walls of odd sections along plane that passes through chords of segments. Surfaces of sections that are opposite to shape-generating surfaces contact with corresponding facets of holder. Sections are connected with holder by means of key connection. ^ EFFECT: simplification of puncheon design and increase of its reliability. ^ 4 cl, 5 dwg