摘要 |
In some embodiments, the instant invention provides for a method including: extruding, utilizing a first die and a mandrel, a hollow tube having a first tube section having a first outer tube diameter of Z, a first inner tube diameter, and a first length; extruding, utilizing a second die and the mandrel, continuing from an end of the first tube section, a hollow tube having a second tube section having a second inner tube diameter and a second length, where the second die has a first die section, and where an angle of a wall of the first die section of the second die relative to a longitudinal axis of the hollow tube ranges from 10 to 45 degrees; extruding a third tube section, a third inner tube diameter, and a third length, and producing a monolithic hollow stepped tube extrudate. |
申请人 |
SCHULTZ, ROBERT, W.;DAIL, GERRY, J.;HARRIS, SCOTT, J.;HERR, JEAN, M.;STAGG, DANIEL;FUNKHOUSER, MARK;KOEKENBERG, RICK, B.;ROADMAN, RONALD, EUGENE;BORGES, AL;FOLKERTS, JILL, A.;GREESON, SCOTT, E. |
发明人 |
SCHULTZ, ROBERT, W.;DAIL, GERRY, J.;HARRIS, SCOTT, J.;HERR, JEAN, M.;STAGG, DANIEL;FUNKHOUSER, MARK;KOEKENBERG, RICK, B.;ROADMAN, RONALD, EUGENE;BORGES, AL;FOLKERTS, JILL, A.;GREESON, SCOTT, E. |