Abstract: A mold press assembly has an outer press frame carrying first and second inner frames that are interlocked to the press frame during relative vertical movements of an upper platen and a lower platen for defining a throat distance for receiving mold parts connected thereto and the first and second inner frames connect on first and second drive shafts for pivotal booking movement. The shafts are connected at one end to an electric motor and connected at other points therealong to ball screws for vertically positioning an upper platen with respect to the outer press frame and for reciprocating the lower platen outwardly with respect to the pivoted second inner frame; and the first and second inner frames are driven by other ball screws and electric motors to pivot about the first and second drive shafts for providing access to mold parts connected to the upper and lower platens.