May 13 - 16, 2008
Gaylord Palms
Orlando, Florida USA

Extrusion/Die Practical

052 PR 
Wednesday, May 14 - 1:15pm

Scrap Allocation

Chris Jowett - Alcan Primary Metal Group, Canada

Norm Fossl- Rio Tinto Alcan, Canada
Johnie Adams and Chris Daughetee - Magnode Corporation, USA
Greg Lea - MI-Metals, USA
Oliver A. Huff - Rio Tinto Alcan, USA

Factors affecting front- and back-end defects are investigated. Temperature and flow variations during early extrusion stages change scrap amount. Back-end scrap (coring) changes due to billet flow variations through the container. A tool to accurately predict coring and transverse weld scrap is presented. Benefits include more precise quoting practices, and reduced overall scrap levels and costs associated with incorrectly predicting defect locations.