RP Process & Material RP Process & Material EvaluationEvaluation

THE RPC CAN DO TESTING OTHERS CANNOT AND PUBLISHES FINDINGSwith Consortium support the Rapid Prototyping Center is in a unique position to conduct studies that others would have difficulty justifying. MSOE has been involved in RP process testing and evaluation since 1991. From the beginning, we have evaluated and published multiple papers on RP related topics. Examples include… SAND CASTING APPLICATIONS of STEREOLITHOGRAPHY•The main objective of this ongoing study is to monitor several SLA-based sand casting patterns for deterioration in a production environment (1000-10,000? range)•Currently, more than 4000 cycles and counting•Results were presented at the SLA User’s Group 2001

RP PATTERNS FOR INVESTMENT CASTING•This study focused on how the quality of investment castings is affected by three parameters including: (1) RP pattern wall thickness, (2) RP material and/or build style, and (3) refractory coating thickness. Shell integrity, percent ash, and casting surface finish were measured to evaluate the effects of the three parameters. •Results were presented at the 1996 International RP Conference and the 1996 SME RP&M Conference.

SLS POWDER LIFE STUDY•The main objective of this study was to determine when powder is no longer usable.•The SLS powder life study proved a tremendous success since we averaged 215 hours per 4 drums before the study and now average 315 hours. •Findings were presented at the 2001 Solid Freeform Fabrication Symposium

Milwaukee School of EngineeringRapid Prototyping Center1025 N. BroadwayMilwaukee, WI 53202414-277-7416 · 414-277-7470 faxE-Mail: Gervasi@msoe.edu

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COMPARISON of HEAT REMOVAL RATES

0

25

50

75

100

125

(70-75) (65-70) (60-65) (55-60)

Temperature Range (Degrees C)

Heat

Rem

oval

Rat

e(m

W)

CONFORMAL COOLINGCOPPER TUBINGTRADITIONAL COOLINGNO COOLING CHANNELS

Figure 7