Patent ID: 6544026
Filing Date: 2003-04-08
Classification: B29C,H02K

Abstract:
A method of operating a mold system having:a pair of mold halves movable toward and away from each other; a threaded spindle coupled to one of the mold halves; a nut threaded on the spindle and coupled to the other of the mold halves; a brakable spindle motor connected to the spindle and operable to rotate the spindle in the nut; a nut motor separate from the spindle motor, connected to the nut, and operable to rotate the nut on the spindle, the method comprising the steps of: in a first mold-closing stage operating the spindle motor to rotate the spindle in the nut and move the mold-halves toward each other, and thereafter in a second and subsequent mold-clamping stage braking the spindle motor and operating the nut motor to rotate the nut on the spindle and press the mold halves against each other.