Increased throughout and decreased melt temperatures also touted.

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Debuting at Chinaplas 2015, May 20-23, the next generation of  STS Mc11 twin screw extruders from Coperion (U.S. office in Ramsey, N.J.) feature an increase in torque from 10 to 11.3 Nm/cm³ and includes patented feature that the supplier employs in its industry-proven ZSK MEGA compounder series.

The new series provides increased throughput by up to 27 % as well as decreased melt temperature due to higher screw filling, thereby improving compound quality. Screw speed has been increased from 800 to 900 rpm. To improve cleaning and quick change for masterbatch applications, the STS Mc11 is equipped with new hoppers with inserts and a redesigned die head. The screw shaft coupling is similar to the time-tested design of the ZSK Mc18 series.

The STS Mc11 series will be equipped with Coperion-branded gearboxes, which will also be used in the medium torque version of the ZSK series. The gearbox redesign project was initiated and driven by Coperion with together with well-known European gearbox suppliers. The new design is a result of Coperion’s extensive experience with the set-up and service of gearboxes gathered over the past decades. By branding the new gearboxes, Coperion is taking full responsibility for design, engineering and service. Coperion will act as the direct contact for all issues regarding the gearboxes, including customer documentation and after sales service. The service group has skilled technicians and quickly available spare parts for customers all around the world. 

To increase stiffness during operation, the STS Mc11 series is equipped with a totally redesigned base frame. This base frame reportedly dampens vibrations and ensures smooth operation of the machine while increasing operation safety and promoting long service.