TPT November 2007

Technology Update

Sleeve-technology steel pipe coating unit

Bandera, Italy, has completed the production of the latest version of its extrusion platform for the coating of steel pipes with sleeve technology, for shipment to a Russian coater. The system is suitable for coating pipes up to Ø 21", and includes an extrusion platform supporting two extruders. One TR160 series machine will be used for PE extrusion, with the other TR85 series unit used for tie resin – meaning a total output of 1,250kg/h. The extruders are equipped with bimetallic barrels, the extrusion screws are coated with a special wear-resistant and antifriction fi The latest extrusion platform from Bandera

alloy, and AC motors with ‘direct torque control’ vectorial inverters are used. Temperatures are controlled by multi-loop modules connected to the PLC (Siemens S7 300) by Profibus cables, and all parameters are managed from a supervising PC. The platform is designed to adjust its position

› The automatic pipe-head axis self-aligning system uses flexible adapters

coating thickness uniformity, allowing a considerable raw material saving.

forward and backward in the pipe direction, in order to optimise the distance between the primer cabinet and the extrusion head, depending on the primer being used.

Costruzioni Meccaniche Luigi Bandera SpA – Italy Fax : +39 0331 680 206 Email : lbandera@lbandera.com Website : www.luigibandera.com

The equipment also features an automatic pipe-head axis self- aligning system. Sensors are located at the inlet side of the head and detect pipe position. The head, connected to the extruders by special flexible adapters, is motorised in such a way that it is able to move both in X and Y directions at the same time. In practice, the head can follow the pipe’s bending deformation, and optimise the

All-electric tube bender cuts fabrication times for aircraft ducting parts

The installation of a Unison all-electric tube bending machine is helping Senior Aerospace SSP to dramatically reduce

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N ovember /D ecember 2007