B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/927
B29C 39/08 (2006.01) A63B 41/10 (2006.01) A63B 45/00 (2006.01) B29C 41/00 (2006.01) B29C 41/22 (2006.01) B29C 41/06 (2006.01)
Patent
CA 1330857
ABSTRACT OF THE DISCLOSURE A process for making hollow elastic bodies, particularly balls and similar objects, consists in introducing a suitable doss of vinyl plastisol into a mould, formed of two joined shells, and in subjecting the mould to a first biaxial rotational moulding stage inside a heated chamber heated to a temperature able to effect the gelling of the vinyl plastisol introduced therein, distributed over the inner surface or the mould, in order to form an outer layer of a hollow body. Afterwords a first cooling stage for the mould is activated and a suitable dose or a further vinyl plastisol is introduced into the mould that is then subjected to a second biaxial rotational moulding stage, in order to form an inner layer of the hollow body, within a chamber heated to a suitable temperature for curing the vinyl plastisol introduced into the mould, and to a final mould-cooling stage.
597930
Marks & Clerk
Tale S.r.l.
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