We turned Hastoloy C round to a depth of .375" to the side with ceramic inserts at 2000 RPM on a 4" dia. Found it much to dangerous to run. The shavings were red hot, very stringy, we always lost the insert at the end of the cut. The insert could
be touched immediately with no excess...
Have you looked at the extrusion blow molding process? An extruded tube of molten plastic is grasped between two mold halves, then injected with a shot of high pressure air to conform to the mold shape. The cycling time is seconds. Search the web for extrusion blow molding to see examples.
