Method of molding polyurethane covered golf balls

Details Method of molding polyurethane covered golf balls Method of molding polyurethane covered golf balls

1989-02-22

1991-04-09

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

Disparate treatment of article subsequent to working,...

Effecting temperature change

264236, 264254, 264255, 264275, 264278, 273DIG8, B29C 3502, B29C 3910, B29C 4318

Patent

active

050062972

ABSTRACT:
A polyurethane covered golf ball is made by allowing the polyurethane cover stock material to partially cure in an open mold and subsequently molding a golf ball product. The molding is done by first molding a smooth-surfaced golf ball product in a smooth-walled fixed-pin mold and then, in a second molding step, using a compression mold to impart dimples onto the smooth-surfaced golf ball product. Between the two molding steps an intermediate curing step is employed. The initial curing time is an open mold and the intermediate curing time between the two molding steps is minimized through the use of a sufficient amount of catalyst, by keeping the smooth mold at an elevated temperature, or by using the fast-reacting chemical components.

REFERENCES:
patent: 3034791 (1962-05-01), Gallagher
patent: 3130102 (1964-04-01), Watson et al.
patent: 3147324 (1964-09-01), Ward
patent: 3177280 (1965-04-01), Ford et al.
patent: 3233036 (1966-02-01), Jachimowicz
patent: 3979126 (1976-09-01), Dusbiber
patent: 3989568 (1976-11-01), Isaac
patent: 4123061 (1978-10-01), Dusbiber

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