Patent ID: 6913456

Claim:
A drive device for displacing first and second linearly movable components ( 10 , 13 ) of a plastics injection-molding machine at least partly at successive times, in particular for displacing the first component that is an injection unit ( 10 ) for bringing an injection nozzle ( 15 ) into contact with a mold, and for displacing the second component that is an injection mechanism ( 13 ) for injecting polymer into the mold, wherein the drive device comprises an electric motor, first and second clutches, a threaded drive having a threaded spindle ( 51 ) and a spindle nut ( 50 ), and at least one shut-off valve; wherein the electric motor ( 45 ) displaces the second component ( 13 ) by means of the first clutch ( 55 ) and the threaded drive; wherein the electric motor displaces the first component ( 10 ) by means of the second clutch ( 56 ), the at least one shut-off valve ( 75 , 95 ) connects between at least one of the clutches and a corresponding one of the first and the second movable components ( 10 , 13 ), and the threaded drive is arranged between the electric motor ( 45 ) and the two clutches ( 55 , 56 ), and wherein, for displacing one of the first and the second movable components ( 10 , 13 ), the drive spindle ( 51 ) of the threaded drive is movable linearly beyond a displacement distance necessary for displacing the other of the first and the second movable components ( 13 , 10 ).