Mould assembly for use in the manufacture of spherical or substa

Details Mould assembly for use in the manufacture of spherical or substa Mould assembly for use in the manufacture of spherical or substa

1980-08-11

1981-10-20

Flint, Jr., J. Howard

Static molds

Container-type molding device

Having plural mold sections

425812, 264 455, B29C 100

Patent

active

042956293

ABSTRACT:
The invention provides means for producing a moulded plastics ball having the appearance of a conventional ball with a continuous curved seam. In order to make the moulding seam (parting-line) as inconspicuous as possible, the invention provides a mould assembly comprising two mould members, having mutually confronting surfaces each surrounding a part-cavity, a generally spherical mould cavity being defined when the confronting surfaces are in contact with one another, lip portions of said surface defining a continuous parting line around a diametral zone of the cavity, said parting line having four portions, comprising two substantially S-shaped portions with two at least substantially straight-line portions, said portions being arranged alternately around the diametral cavity zone, each portion of the line meeting its adjacent portion to include an angle of not substantially less than a right-angle.

REFERENCES:
patent: 2938237 (1960-05-01), Kern et al.
patent: 3058158 (1962-10-01), Aghnides
patent: 3069170 (1962-12-01), Dillon
patent: 3454257 (1969-07-01), Dupuis
patent: 3836308 (1974-09-01), Upright
patent: 3976295 (1976-08-01), Heald
patent: 4144297 (1979-03-01), Tomar
patent: 4188178 (1980-02-01), Anscher

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