Closed cell foam article and manufacturing method
Closed cell foam articles, such as sports balls, and related manufacturing methods are disclosed herein. The article includes a main body made of closed-cell elastomeric resin foam having a density ranging between about 0.050 sg and about 0.800 sg after curing. Some articles are assembled by inserting a cured core into a main body so that the core is secured in the main body via an interference fit, and the core has one or more portions extending to the exterior surface of the main body such that the an exposed surface of the one or more exposed portions of the core blend substantially with the exterior surface of the main body.
1. A method for manufacturing a closed cell foam article, comprising:
injection molding and curing a main body of closed cell foam, the main body having an exterior surface and
an interior surface defining a cavity extending to the exterior surface so that the cavity has one or more sections exposed at the exterior surface of the main body; and
injection molding and curing a core of closed cell foam and sized to fit and substantially fill the cavity; and
assembling the article by inserting the core into the main body before curing the main body such that the core is secured in the main body via a self-centering interference fit,
and one or more exposed portions of the core align substantially with the exterior surface of the main body to form a single surface.
2. The method of claim 1 , wherein the article includes a closed cell foam material having a density ranging between about 0.800 sg and about 0.050 sg after curing.
3. The method of claim 1 , wherein the main body has a diameter in the range of about 2 inches to about 22 inches.