| 摘要 |
A mold for forming a recorded disc includes a base plate and a cap plate mounted on the base plate. Bolts extending through the base plate and threaded into the cap plate secure the outer portions of the plates together. A hub projecting from the cap plate extends through a hole in the base plate and a nut threaded on the hub and engaging a surface of the base plate secures the inner portions of the plates together. The cap plate has a plurality of sets of grooves in its inner surface which mates with a surface of the base plate. The grooves in each set are radially spaced, concentric, circular grooves connected by slots. An inlet passage extends through the base plate to one of the grooves of each set and an outlet passage extends through the base plate to a groove of each set to provide for a separate flow of a temperature control medium through each set of grooves. The base plate and cap plate are made of materials having suitable physical properties for the specific plate. The cap plate has a mold cavity in its outer surface which is designed to provide a complete filling of the cavity.
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