A feasibility study of the partial squeeze and vacuum die casting process

A feasibility study of the partial squeeze and vacuum die casting process w as performed to make defect-free casting products with excellent mechanical properties. The trial die casting process in this study was industrially i mplemented for producing a reaction shaft support made of a hyper eutectic Al-15%Si alloy. To combine the squeezing and vacuum effect, the plunger inj ection system was designed and attached to a chill vent type vacuum machine ry system. The combination of the vacuum effect before injection and the sq ueezing effect after injection resulted in excellent defect-free die castin g products. The uniform distribution of fine acicular eutectic and proeutec tic silicon obtained from the trial process also provided excellent mechani cal properties. (C) 2000 Elsevier Science S.A. All rights reserved.