Rotary log bonding - optimising profile yield

摘要

The extrusion press is the conversion point of the extrusion process. Extruded profile downstream of the extrusion press has high 'added value', and maximising yield downstream is essential to profitability. The use of two-piece billets in a 'cut-to-length' arrangement after heating has provided better ingot utilisation than precut billets. The historic challenge of two-piece billets has been profile defects caused by trapped air and impurities on the faces of the log joint. So improved ingot utilisation has been at the expense of profile yield. The 'Fusion Bond' process eliminates the tension between profile defects and optimum log utilisation.