Method of making golf ball comprising aligning thermoformed depressions with dimpled mold cups and applying sufficient heat and suction to the thermoformed depressions without exposing any preselected subassembly to the heat and suction to soften the polymeric material of each thermoformed depression and draw air outward from a volume located between an inner surface of the dimpled mold cup and an outer surface of the thermoformed depression to form a thermoformed pre-form half-shell having an outer surface with the size, shape and contour of the inner surface of the dimpled mold cup(s) and an inner surface with the size, shape and contour of the outer surface of a preselected subassembly. Afterwards, a preselected subassembly is loaded between a pair of thermoformed pre-form half-shells and molded under sufficient short-term heat and suction to form the golf ball. The thickness of each thermoformed depression and thermoformed pre-form half-shell may be tapered.

A method of manufacturing golf balls having a core and a cover of at least one layer encasing the core includes the steps of producing a core by molding and vulcanizing a rubber composition containing (A) a base rubber, (B) an ,-unsaturated carboxylic acid and/or a metal salt thereof, and (C) an organic peroxide; and heat-treating the core for 1 to 24 hours at between 175 and 300 C. Golf balls which undergo little energy loss and have a high initial velocity can be obtained by this method.

A method of manufacturing golf balls having a core and a cover of at least one layer encasing the core includes the steps of producing a core by molding and vulcanizing a rubber composition containing (A) a base rubber, (B) an ,-unsaturated carboxylic acid and/or a metal salt thereof, and (C) an organic peroxide; and heat-treating the core for 1 to 24 hours at between 175 and 300 C. Golf balls which undergo little energy loss and have a high initial velocity can be obtained by this method.

In the process of making a hollow product, especially a deformable toy ball, two halves made from on elastomeric material, a thermoplastic material, rubber, a blend of rubbers, or a thermoplastic elastomer are formed by injection molding with mating edges that engage with each other when the halves are assembled to form the product. The edge of one of the two halves is advantageously formed with a recess centered in the edge, in which a flange formed on the edge of the other of the two halves engages to provide a form-fitting connection between the two halves. The opposing edges are then bonded with each other by fusion or melting or by an adhesive applied to at least one of the edges prior to assembling the halves together. A deformable ball produced by the process is also described.

The invention relates to a method for producing an object comprising the the following steps: producing a shell, which surrounds a volume for holding a fluid, by means of an additive manufacturing method from a construction material; providing a reaction mixture comprising a polyisocyanate component and a polyol component in the volume and allowing the reaction mixture to react in the volume such that a polymer present at least partly in the volume is obtained. The reaction mixture has a setting time of 2 minutes. An object that can be obtained by means of a method according to the invention comprises a shell, which defines a volume located within the shell, and a foam, which completely or partly fills the volume. The shell comprises a thermoplastic polyurethane polymer, the foam comprises a polyurethane foam having a compressive strength at 10% compression (DIN EN 826) of 50 kPa or a compression hardness at 40% compression (ISO 3386) of 15 kPa and the foam and the shell are at least partly integrally bonded to each other. The object can be a football, for example.

Method of making golf ball comprising aligning thermoformed depressions with dimpled mold cups and applying sufficient heat and suction to the thermoformed depressions without exposing any preselected subassembly to the heat and suction to soften the polymeric material of each thermoformed depression and draw air outward from a volume located between an inner surface of the dimpled mold cup and an outer surface of the thermoformed depression to form a thermoformed pre-form half-shell having an outer surface with the size, shape and contour of the inner surface of the dimpled mold cup(s) and an inner surface with the size, shape and contour of the outer surface of a preselected subassembly. Afterwards, a preselected subassembly is loaded between a pair of thermoformed pre-form half-shells and molded under sufficient short-term heat and suction to form the golf ball. The thickness of each thermoformed depression and thermoformed pre-form half-shell may be tapered.

Embodiments of the present disclosure are directed to leak-free exercise devices that are soft and conformable due to being filled with granular material. The devices are formed from one or more flexible panels joined together to form a cavity and a filler material, such as sand, contained within the cavity. The devices comprise welded seams that prevent liquid or moisture from entering the cavity and/or granular material from exiting the cavity. In some embodiments, the one or more flexible panels may further be made of waterproof materials.

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.

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.

The present invention is directed to golf balls having improved aerodynamic performance due, at least in part, to the alteration of the dimple surfaces. In particular, the present invention relates to a golf ball that includes at least a portion of its dimples having circular perimeters and dimple profiles having a concentric groove or a non-concentric groove on the surface of the dimple. The golf ball dimples of the present invention provide golf ball surfaces having unique appearances, while maintaining ideal aerodynamic characteristics.