Extruders need state-of-the-art controllers and screw design, as
well as a deep understanding of the extrusion process, for producing high-performance, thin-walled tubing.“This combination
allows for some of the most advanced and complicated extrusions
to be produced at the highest quality possible,”said Bills.
State-of-the art extrusion equipment now makes it possible to
extrude multiple layers and diverse geometric configurations. Profile tubing, a process where a final non-round shape is drawn into
the tubing as the last processing operation, is relatively a new development that is being widely used by design engineers.
“Previously, a round tube needed secondary fabrication to ob-
tain a profile shape,” said Savage.“Now it can be done as part of
the mill drawing operation.”
Some new equipment that has impressed Shedd is Guill Tool
& Engineering Co. Inc.’s“MicroAdjust,”an extrusion head that
centers using a single screw on the horizontal and vertical axis.
“This is a simple, low-tech thing, but it can save a lot of time
and frustration,”he said.“Movement is more precise compared to
a conventional concentricity bolt, which also reduces the risk of
For Eldon James, the most significant technological advances
affecting the company are in downstream equipment. This in-
cludes highly accurate microprocessor-based measurement de-
vices and cutting and winding equipment. New measurement
equipment monitors in process deviation and is capable of statis-
tical process data output. This capability greatly increases effi-
ciency by reducing trial-and-error start-up measurements.