Patent ID: 7004743

Claim:
An installation for the treatment and further processing of thermoplastics, comprising an extruder ( 1 ), which has a housing ( 2 ), at least one screw ( 5 , 5 ′) disposed in the housing ( 2 ), an electric motor ( 6 ) coupled with the at least one screw ( 5 , 5 ′), said electric motor having a run-up time t H and a deceleration time t B , wherein said electric motor is coupled to said screw in a manner to drive said screw when said electric motor is running at least one metering device ( 10 , 14 ) with a metering motor ( 12 , 15 ), said metering motor having a run-up time t H and a deceleration time t B , a processing unit ( 26 , 30 ) directly downstream of the extruder ( 1 ), said processing unit having a drive ( 28 ), said processing unit having cycle time t T , a control unit ( 29 ), electronically interfaced with the electric motor ( 6 ), the metering motor ( 12 , 15 ), and the drive ( 28 ) of the processing unit ( 26 , 30 ), and wherein said control unit is configured and interfaced to: control said drive of said processing unit to intermittently operate for said cycle time t T , control said electric motor and said metering motor so as to trigger their operation in accordance with the cycle time t T , and only trigger the operation of the electric motor and metering motor when a melt strand is ready to be extruded to the processing unit, and wherein said metering motor and electric motor have identical run-up and deceleration times.