On the rapid manufacturing process of functional 3D printed sand molds
Article dans une revue avec comité de lecture
3D printing sand mold technology offers an opportunity for the foundry industry to rethink old casting approaches and to revive the manufacturing approach using computer models. One of the major concerns in sand molding using 3D printing is the functional characterization of the 3D printed molds as its mechanical and mass transport properties. This research paper discusses the effects of binder content on the mechanical strength and the permeability of 3DP sand molds at different curing conditions. The local permeability of the 3DP specimen was measured as a function of the injection flow rate in order to quantify the inertial pressure effects. The mechanical strength of the 3DP sand molds was characterized using traditional three-point bending strength measurements. The results show that the mechanical strength of the printed molds is deeply dependent on the amount of binder and the curing process. The 3PB strength was found to increase when cured at 100 °C and decrease when cured at 200 °C for all binder contents. The 3PB strength attains its maximum when cured at 100 °C for 2 h for all binder content. In contrast, no significant effect of the amount of binder on the initial permeability of the samples before curing was observed within the functional range of binder mass fraction (1.02–1.98 %). Maximum permeability is attained at the same conditions as the 3PB strength. Therefore, the mechanical strength of the sample can be optimized within the investigated range of binder contents without resulting in any significant decrease in permeability.
Files in this item
Showing items related by title, author, creator and subject.
The effect of ageing process on three-point bending strength and permeability of 3D printed sand molds Article dans une revue avec comité de lectureMITRA, Saptarshee; RODRIGUEZ DE CASTRO, Antonio; EL MANSORI, Mohamed (Springer Verlag, 2018)The objective of this paper was to investigate the effects of curing parameters (i.e., temperature and time), on the permeability and mechanical strength of the printed molds. Several sets of samples were hence produced ...
Study of the evolution of transport properties induced by additive processing sand mold using X-ray computed tomography Article dans une revue avec comité de lectureMITRA, Saptarshee; EL MANSORI, Mohamed; RODRÍGUEZ DE CASTRO, Antonio; COSTIN, Marius (Elsevier, 2020)Accurate characterization of the mass transport properties of additively processed sand molds is essential in order to achieve reproducibility of the produced castings and control of gas defects in foundry industries. The ...
Article dans une revue avec comité de lectureRODRIGUEZ DE CASTRO, Antonio; RADILLA, Giovanni (American Geophysical Union, 2016)Understanding non-Darcian flow of shear-thinning fluids through rough-walled rock fractures is of vital importance in a number of industrial applications such as hydrogeology or petroleum engineering. Different laws are ...
Using Xanthan Gum Solutions to Characterize Porous Media with the Yield Stress Fluid Porosimetry Method: Robustness of the Method and Effects of Polymer Concentration Article dans une revue avec comité de lectureRODRÍGUEZ DE CASTRO, Antonio; AHMADI-SENICHAULT, Azita; OMARI, Abdelaziz (Springer Verlag, 2018)The yield stress fluids porosimetry method (YSM)was recently presented as a simple and non-toxic potential alternative to the extensively used mercury intrusion porosimetry (MIP). The success of YSM heavily relies on the ...
Conférence invitéeAHMADI-SENICHAULT, Azita; RODRIGUEZ DE CASTRO, Antonio; MALVAULT, Guillaume; OMARI, Aziz (2016)A Yield Stress fluids injection porosimetry Method (YSM) has recently been developed as a simple potential alternative to the extensively used Mercury Intrusion Porosimetry (MIP). Its main advantage is the use of a nontoxic ...