Extrusion-based additive manufacturing (EAM) is a relatively new process developed for the production of complex metallic and ceramic parts needed in smaller quantities. The debinding sintering step EAM adopted from well-known powder injection molding process. However, 3D printing needs special consideration to make competent era rapid manufacturing. This study intended investigate effect commo...

Abstract 3D printing opens up new possibilities for the production of polymeric structures that would not be possible with injection molding. However, it is known manufacturing method might have an impact on mechanical properties manufactured components. To this end, behavior test specimens made thermoplastic polyurethane compared two different methods. In particular, SEAM technology (screw ext...

The aim of this study is the evaluation powder injection molding (PIM) binder compositions for material extrusion (MEX) additive manufacturing zirconia parts. Four commercial PIM were selected and mixed with 45 vol% yttria-stabilized powder. Due to brittle characteristic obtained ceramic feedstocks, a screw based pellet printing head was used dense structures. To compare 3D performance, additio...

Economic and environmental costs are assessed for four different plastics manufacturing processes, including cold hot runner molding as well stock upgraded material extrusion three dimensional (3D) printers. A larger 3D printer was found to provide a melting capacity of 14.4 ml/h, while smaller with an extruder had 36 ml/h. printing at these maximum capacities resulted in specific energy consum...

Abstract This paper studies the influence of nozzle structure and process parameters on solid propellant 3D printing process, so as to better guide optimization improvement, realize continuous extrusion molding propellant. Four characteristic such diameter, shrinkage angle, temperature, wall slip coefficient are selected, these four speed pressure slurry in is discussed by using orthogonal test...

The two objectives of this research are to produce plastic that is environmental friendly whereby the plastic produced can be at least slightly decomposed to smaller substances by the living organisms from marine algae and also to characterize the plastic that have been produced from the marine algae via mechanical and physical testing. In this study, algae which are Red Eucheuma cottonii are t...

Injectable bone fillers have emerged as an alternative to the invasive surgery often required to treat bone defects. Current bone fillers may benefit from improvements in dynamic properties such as shear thinning during injection and recovery of material stiffness after placement. Negatively charged inorganic hydroxyapatite (HAp) nanoparticles (NPs) were assembled with positively charged organi...

The biodegradability of three types of bioplastic pots was evaluated by measuring carbon dioxide produced from lab-scale compost reactors containing mixtures of pot fragments and compost inoculum held at 58 °C for 60 days. Biodegradability of pot type A (composed of 100% polylactic acid (PLA)) was very low (13 ± 3%) compared to literature values for other PLA materials. Near infrared spectrosco...

Sugar beet pulp (SBP) is the raffinate of sugar extraction. Composed of empty vegetal cells, three quarters of it consist of polysaccharides. As it is cheap and produced in great quantities SBP is a potential raw material for industrial applications other than cattle feeding. Twin-screw extrusion modified its structure and destructuring level depended on the specific mechanical energy provided ...