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US 6,379,138 B1Granted
Injection molding apparatus
AssigneeAcushnet Company
InventorsPaul A. Puniello, Robert A. Wilson
Life of this patent
Estimating the term…
Abstract
The present invention relates to a retractable pin assembly for an injection mold. One end of the retractable pin is inside the mold, while the other end extends outside of the mold cavity. The inside end of the retractable pin may by shaped to conform with the shape and texture of the mold cavity wall. The retractable pins are moved in and out of the mold cavity by cams that rotate around the injection mold.
Claims21
A retractable pin assembly for an injection mold comprising:
- (a) a retractable pin having one end inside a mold cavity and another end outside said mold cavity, said pin being oriented in a non-vertical plane;
- (b) a cam positioned against the outside end of said retractable pin, wherein said cam rotates to advance and retract the end inside the mold cavity.
A golf ball injection mold, comprising:
- (a) a first mold plate defining a first cavity having a substantially hemispherical inner surface terminating in a first parting line surface;
- (b) a second mold plate defining a second cavity having a substantially hemispherical inner surface terminating in a second parting line surface, wherein both said mold plates have mating surfaces for mating with each other along a predetermined plane, and together defining a substantially spherical mold cavity when said mating surfaces are joined;
- (c) a plurality of retractable pins that extend from the inner surface of the first and second mold cavities to the outer surface of a gold ball core to securely hold the core in position within the spherical mold cavity, wherein said retractable pins are oriented to operate in a direction essentially normal to the surface of the golf ball core;
- and
- (d) rotatably operated cams for engaging said plurality of retractable pins with a golf ball core.
2 more elements
Dependencies are inferred from the claim text.