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6605029 
Journal Article 
Filling mechanism for prototype parts produced by vacuum differential pressure casting technology 
Kuo, CC; Qiu, W; Liu, HAn; Chang, CM; , 
2019 
Yes 
International Journal of Advanced Manufacturing Technology
ISSN: 0268-3768 
SPRINGER LONDON LTD 
LONDON 
105 
1-4 
1469-1481 
WOS:000495396000089 
Vacuum casting (VC) is the most economical production process for producing small numbers of prototype parts under vacuum conditions. The filling of the casting material in the conventional VC process only depends on the gravity. Thus, some defects of the cast part are observed. In this study, differential pressure (DP) VC was proposed to reduce the filling time and improve the quality of cast parts. In this study, the filling mechanisms in both horizontal and vertical directions were investigated theoretically and experimentally. The actual filling situations of the acrylonitrile butadiene styrene resin in both the horizontal and vertical directions are similar to the simulation results. The relationship of the filling time for DP time, sprue diameters, and mold cavity capacities was investigated. The filling time can be estimated in terms of DP time, sprue diameter, and mold cavity capacity.