Method and apparatus for manufacturing a spherical hollow body

Details Method and apparatus for manufacturing a spherical hollow body Method and apparatus for manufacturing a spherical hollow body

1980-02-27

1981-10-13

Flint, Jr., J. Howard

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

425430, 425233, B29C 504

Patent

active

042947936

ABSTRACT:
Improved method for manufacturing a spherical hollow body are disclosed. The spherical hollow body has a use for a core member for manufacturing a football or a volleyball and is manufactured by cooling a thermoplastic resin contained in a spherical hollow mold which is forcedly circulated along a constant locus simultaneously with the rotary motions on two axes orthogonal to each other.

REFERENCES:
patent: 2957202 (1960-10-01), Rekettye
patent: 2967329 (1961-01-01), Friedland et al.
patent: 3072965 (1963-01-01), Miller
patent: 3829272 (1974-08-01), Carillon et al.
patent: 4028038 (1977-06-01), Haigh

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