How is a hockey puck made?

1. Granular rubber is mixed with special bonding material by hand.

2. The mixture is put in a two part (male-female) mold.

3. The mold is cold compressed. (This procedure actually takes place at room temperature.)

Sources: http://www.answers.com/topic/hockey-puck-1

http://www.madehow.com/Volume-6/Hockey-Puck.html

http://www.encyclopedia.com/doc/1G2-2897000054.html