Patent ID: 11872616
Assignee: JIN YUNCHENG ENTERPRISE CO., LTD.
Field: Materials, metallurgy (Chemistry)
Classification: CPC B  C | IPC B  C

Claim 4:
5. The method as claimed in claim 1, wherein step (A) further includes providing a second cold extrusion apparatus, the second cold extrusion apparatus including a second cold extrusion die, a second ram and a second plunger corresponding in position to the second cold extrusion die, the second plunger extending downwardly from the second ram, the method further comprising a step (G) after step (F), wherein step (G) involves positioning the cold-forged, extruded aluminum alloy tube in the second cold extrusion die, after which the second cold extrusion apparatus is operated to strike the second ram against the cold-forged, extruded aluminum alloy tube with the second plunger extending through the central bore of the cold-forged, extruded aluminum alloy tube to thereby form a patterned cold-forged, extruded aluminum alloy tube.