TPT May 2015

Technology News

PE and PE pipe extrusion THE Zephyr extruders from Tecnomatic are the evolution of the Zeus gearless extruders and Vega 37 L/D series used in the extrusion of pipes. A year since they were first presented at the K-show in Germany, several extruders have been sold and tested in production with excellent results. The new extruder series L/D 40 offers a number of innovative solutions, with the key guideline of the new project being to increase the output rate at lower melt temperatures and power consumption. This result has been achieved thanks to the adoption of a spiral grooved feed bush and further improvements in screw design. The new feed bush ensures minor friction, which is commonly generated by raw material transport, with the subsequent increasing of the specific and total throughput. The further development in screw design, with optimisation and enhancement of torque and shearing elements, has improved the output but has also led to the ability to process the material at lower melt temperatures. To complete the configuration and to meet the requirements for production efficiency the machines are equipped with torque or water-cooled motors (in this case with one or two step gearboxes) and compact water-cooled inverters. These solutions combined with the mechanical features ensure outstanding power consumption levels (eg lower than 170wh/kg for Zephyr 60.40 at 800kg/h) but also low noise operation (<74Db), reduced workload for maintenance, higher efficiency within wide speed and load ranges, and faster dynamic response. The equipment also includes modules for constant monitoring of power consumption and production cost calculation. The result on the ground shows the evolution trend for pipe extrusion, which is the reduction of the extruder size, with increased screw length and smaller motors, to ensure the same output with a better energy efficiency. A comparison between a gearless extruder in size 60.37 and the new Zephyr 60.40 clearly shows the advantages.

3 Good Ways ...

Tecnomatic Srl – Italy Website: www.tecnomaticsrl.net

44

www.read-tpt.com

M ay 2015 2015_03 TPT Schwarze-Robitec Ad Issue May 87x260.indd 1

03.03.2015 16:46:15