Spherical body and method of manufacture

Details Spherical body and method of manufacture Spherical body and method of manufacture

1998-11-18

2000-10-24

Ball, Michael W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156214, 156285, 264516, B29C 2718, A63B 3702

Patent

active

061361259

ABSTRACT:
A spherical body having a core and a surface layer is manufactured by a method comprising a preforming step in which a pair of sheet blanks (1) are formed into half-shells (11) in a two-part mold (2) having hemispherical concave mold halves by pressing each blank from one side while applying vacuum suction to the other side; a surface layer forming step in which the half-shells are loaded into another two-part mold (12) having pattern-forming projections, the core (19) is placed on one mold half, and the other mold half is joined thereto to close the mold, thereby pressing the core against the inner side of each half-shell, concurrent with which vacuum suction is applied to the outer side; and a molding step in which the surface layer is fused and solidified onto the core within the closed mold.

REFERENCES:
patent: 1387805 (1921-08-01), Roberts
patent: 2211028 (1940-08-01), Roberts
patent: 3411974 (1968-11-01), Jones-Hinton et al.
patent: 4229401 (1980-10-01), Pocklington
patent: 4943332 (1990-07-01), Sakaguchi et al.
patent: 5342463 (1994-08-01), Addeo et al.
patent: 5572804 (1996-11-01), Skaja et al.

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