Rapid Prototyping Journal: Volume 27 Issue 11

Experimental study on the accuracy and surface quality of printed versus machined holes in PEI Ultem 9085 FDM specimens

Giovanni Gómez-Gras, Marco A. Pérez, Jorge Fábregas-Moreno, Guillermo Reyes-Pozo

This paper aims to investigate the quality of printed surfaces and manufacturing tolerances by comparing the cylindrical cavities machined in parts obtained by fused deposition…

Casting of complex structures in aluminum using gypsum molds produced via binder jetting

Luca Giorleo, Michele Bonaventi

The purpose of present paper is to enlarge the knowledge about the performance of gypsum powder to realize complex molds or cores for aluminum casting.

A comparative analysis of the compression characteristics of a thermoplastic polyurethane 3D printed in four infill patterns for comfort applications

Susan Erica Nace, John Tiernan, Donal Holland, Aisling Ni Annaidh

Most support surfaces in comfort applications and sporting equipment are made from pressure-relieving foam such as viscoelastic polyurethane. However, for some users, foam is not…

From mine to part: directed energy deposition of iron ore

Himani Naesstroem, Frank Brueckner, Alexander F.H. Kaplan

This paper aims to gain an understanding of the behaviour of iron ore when melted by a laser beam in a continuous manner. This fundamental knowledge is essential to further…

Design, simulation, testing and application of laser-sintered conformal lattice structures on component level

David Marschall, Sigfrid-Laurin Sindinger, Herbert Rippl, Maria Bartosova, Martin Schagerl

Laser sintering of polyamide lattice-based lightweight fairing components for subsequent racetrack testing requires a high quality and a reliable design. Hence, the purpose of…

Compaction behavior of powder bed fusion feedstock for metal and polymer additive manufacturing

Francesco Sillani, Dominik Wagner, Marvin Aaron Spurek, Lukas Haferkamp, Adriaan Bernardus Spierings, Manfred Schmid, Konrad Wegener

Powder bed-based additive manufacturing (AM) is a promising family of technologies for industrial applications. The purpose of this study is to provide a new metrics based on the…

Towards 3D printing of a monocoque transtibial prosthesis using a bio-inspired design workflow

Luca Gabriele De Vivo Nicoloso, Joshua Pelz, Herb Barrack, Falko Kuester

There are over 40 million amputees globally with more than 185,000 Americans losing their limbs every year. For most of the world, prosthetic devices remain too expensive and…

The effect of annealing on deformation and mechanical strength of tough PLA and its application in 3D printed prosthetic sockets

Diede Christine Wijnbergen, Merel van der Stelt, Luc Martijn Verhamme

Fused filament fabrication (FFF) using tough poly lactic acid (PLA) was determined to be the most suited method to achieve low-cost prosthetic sockets. However, improvement in the…

An optimisation framework for designs for additive manufacturing combining design, manufacturing and post-processing

Anton Wiberg, Johan Persson, Johan Ölvander

The purpose of this paper is to present a Design for Additive Manufacturing (DfAM) methodology that connects several methods, from geometrical design to post-process selection…