Replicated CDs are mass-produced initially using a hydraulic press. Small granules of heated raw polycarbonate plastic are fed into the press. A screw forces the liquefied plastic into the mold cavity. The mold closes with a metal stamper in contact with the disc surface. The plastic is allowed to cool and harden. Once opened, the disc substrate is removed from the mold by a robotic arm, and a 15 mm diameter center hole (called a stacking ring) is created. The time it takes to "stamp" one CD is usually two to three seconds.
Replicated CDs are mass - produced initially using a hydraulic press . Small granules of heated raw polycarbonate plastic are fed into the press . A screw forces the liquefied plastic into the mold cavity . The mold closes with a metal stamper in contact with the disc surface . The plastic is allowed to cool and harden . Once opened , the disc substrate is removed from the mold by a robotic arm , and a 15 mm diameter center hole ( called a stacking ring ) is created . The time it takes to " stamp " one CD is usually two to three seconds .
How are CDs mass produced?
How are CDs mass produced ?
hydraulic press
hydraulic press