Study of Metal Powder Extrusion and Accumulating Rapid Prototyping

Ji Bin Li; Zhan Gong Xie; Xiao Hui Zhang; Qi Gao Zeng; Hai Jun Liu

doi:10.4028/www.scientific.net/KEM.443.81

Paper Titles

Applying a Uniform Design of Experiment Approach for Reducing Injection Moulding Warpage Deflection
p.57

Application of the Grey-Taguchi Method to the Optimization of Metal Injection Molding (MIM) Process
p.63

Parameter Optimization of Injection Molding Ti-6Al-4V Powder and Palm Stearin Binder System for Highest Green Density Using Taguchi Method
p.69

Fabrication and Detection for the Skeletons of Micro Aerial Vehicle Using Precision Injection Molding
p.75

Study of Metal Powder Extrusion and Accumulating Rapid Prototyping
p.81

An Analytical Approach to the Extrusion Pressure of Bimetallic Tube
p.87

A Numerical Investigation of Extrusion through Bezier Shaped Curved Die Profile
p.93

Analyses of Plastic Flow and Die Design during Hot Extrusion of Magnesium Alloy Strips
p.98

Analytical Solutions and Finite Element Modelling of Deep Drawing Process for Cylindrical Metal Cups
p.104

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Study of Metal Powder Extrusion and Accumulating Rapid Prototyping

Abstract:

A new method, namely Metal Powder Extrusion & Stacking Modeling is proposed in this paper based on RP and Metal Injection Molding (MIM) principle. Stainless steel powder and thermoplastic paraffin wax-based binder are used in our experiment. Firstly, feedstock is generated by mixing power and binder in a rotor internal mixer. Then the granular feedstock is put into screw-extruder devices to extruded filament, and accumulating green part at atmospheric status. Finally, green part is thermal defatted and sintered in hydrogen atmosphere to product the sintered parts. The testing results are as follows. The density of our RP product is 73.75%. The average shrinkage rate is 7.51%, 18.00%, and 29.31%, for diameter, thickness and volume respectively. Brinell hardness is HB77.52, while bending strength is 457MPa and tensile strength is 163Mpa. The experimental results verify that our proposed method is promising.