The invention provides a process for manufacturing a golf ball, particularly a multi-layer golf ball. The process comprises forming a pre-molded center, molding two substantially hemispherical shells having substantially hemi spherical cavities, shaping the shells in a press having a top mold and a bottom...http://www.google.es/patents/US6290797?utm_source=gb-gplus-sharePatente US6290797 - Process for making multi-layer core golf balls
