Golf-ball-cover casting molds with self-centering mold-cavity inserts

A method for casting a cover on a golf ball, comprising:

• mounting at least one opposable pair of first and second mold-cavity inserts, each insert defining a respective substantially hemispherical cavity for casting a respective half of a cover and each insert defining a respective parting surface, to respective support members in a manner providing at least one of the first and second mold-cavity inserts with floatability in at least three degrees of freedom relative to the respective support member;
• providing the mold-cavity inserts of the opposable pair with respective self-centering devices;
• with respect to the mold-cavity inserts of the opposable pair, adding a castable resin and core to the hemispherical cavities;
• moving the support members to position the mold-cavity inserts of the opposable pair face-to-face with each other;
• bringing the parting surfaces of the face-to-face mold-cavity inserts into mutual contact such that the hemispherical cavities form a ball-cavity enclosing the resin and core;
• as the parting surfaces are brought into mutual contact, mutually engaging the self-centering devices of the face-to-face mold-cavity inserts with each other to center the inserts with each other;
• curing the resin to form a covered golf ball;
• and
• opening the mold-cavity inserts and removing the covered golf ball from the ball cavity.