Mold plate and method of molding golf ball core

1. A mold for manufacturing hemispherical sections for a golf ball, comprising:

a first mold plate including a first surface having hemispherical projections and a second mold plate with a second surface facing the first surface, wherein the second surface has corresponding hemispherical cavities, wherein each pair of the projections and the cavities fit together to form a gap therebetween for molding the hemispherical sections; and

a movable insert between the first mold plate and the second mold plate comprising apertures surrounding the hemispherical projections;

wherein the movable insert is connected to the first mold plate;

wherein the first surface of the first mold plate and the movable insert move relative to one another during molding of a hemispherical section for a golf ball to extend the hemispherical projections through the apertures;

wherein the projections include a mechanical fastening device to assist with maintaining a position of a slug on the first surface; and

wherein the movable insert receives a portion of the slug to support the slug during molding of the hemispherical section.

2. The mold of claim 1 , wherein the movable insert is connected to the mold plate by at least one spring.

3. The mold of claim 1 , wherein the first surface of the mold plate includes a release coating.

4. The mold of claim 1 , wherein a surface of the movable insert facing the second surface surrounds the projections in a plane.

5. The mold of claim 1 , wherein the movable insert is connected to the mold plate by a biasing device.

6. The mold of claim 5 , wherein the biasing device is configured to bias the movable insert to a first position at which a surface of the movable insert facing the second mold plate is proximate to tops of the projections.

7. The mold of claim 5 , wherein the mold is arranged such that when the mold is closed the mold plate contacts the movable insert and moves the movable insert relative to the projections.

8. The mold of claim 1 , wherein the movable insert is in contact with the slug prior to and during molding of the hemispherical section.

9. The mold of claim 1 , wherein the movable insert and the mechanical fastening device cooperate to maintain a position of the slug relative to the first surface prior to and during molding of the hemispherical section.

10. The mold of claim 1 , wherein the movable insert and the mechanical fastening device are in contact with the slug prior to molding of the hemispherical section.