... the processing tool (point-to-point-, line- and mask-based) defining competitiveness. This study aims to define appropriate complexity indicators and evaluate the impact on productivity of PBF-LB/P (laser sintering). Design/methodology/approach An assessment methodology for geometric complexity is developed...

...James Tarver; Kieran Nar; Candice Majewski Purpose The purpose of this paper is to elucidate the extent to which the mechanisms of polymer melt viscous flow and finish layer powder particle adhesion influence the top surface topographies of laser sintered polyamide (PA12) components. Design...

...Ryuichi Kobayashi; Ming Yang Purpose Orange peel formation remains to be understood clearly because it is difficult to directly observe a laser-sintered process in a partcake. Therefore, this study aims to provide insight into the orange peel formation mechanism through the nondestructive...

...Ryuichi Kobayashi; Takashi Kigure; Ming Yang Purpose This paper aims to describe a new process for suppressing the formation of orange peel, which is a polymer laser sintering (LS) process error. Design/methodology/approach The target for controlling the suppression of orange peel is securing...

...Anna Liebrich; Horst-Christian Langowski; Regina Schreiber; Bernd R. Pinzer Purpose This study aims to investigate the effect of the material thickness and build orientation on the mass transfer of low molecular weight substances through polyamide 12 (PA12) structures produced by laser sintering...

...James Robert Wingham; Maha Omran; Joanna Shepherd; Candice Majewski Purpose The use of laser sintering (LS) in the medical sector has increased dramatically in recent years. With the move towards direct use of these parts in clinical applications, there is a greater need to understand the effects...

... or contamination. This paper aims to demonstrate that micro-CT can also be used to quantitatively analyse the homogeneity of micro-composite parts, in this case created using laser sintering (LS). Design/methodology/approach LS specimens were manufactured in polyamide 12 with and without incorporation...

...Hui Zhang; David Bourell; Yanling Guo; Xiaodong Zhang; Yu Zhuang; Yueqiang Yu; Kaiyi Jiang; Wasim M.K. Helal Purpose A pine/co-PES composite (PCPES composite) was proposed as the feedstock for powder bed fusion (laser sintering, LS). This paper aims to provide some necessary experimental data...

... characteristics of laser sintering and get the optimal process parameters. Design/methodology/approach The effect of mass ratio of co-PA-PES on thermal behavior was analyzed using a simultaneous thermal analyzer, and the density and mechanical properties of sintered parts were tested to evaluate...

..., this paper aims to detail a new type of SRBA that is inspired by the armor plating of mammals and is fabricated using laser sintering (LS) technology. Design/methodology/approach This new type of SRBA was fabricated using LS technology. The laser sintered SRBA was subjected to a stab resistance...

...Justin Nussbaum; Nathan B. Crane Purpose Projection sintering, a system for selectively sintering large areas of polymer powder simultaneously with a high-power projector is introduced. This paper aims to evaluate the suitability of laser sintering (LS) process parameters for projection sintering...

..., geometrical standard elements and attributes that characterize the elements’ shapes have been defined. Next, the standard elements have been manufactured with different attribute values with Laser Sintering, Laser Melting and Fused Deposition Modeling, and their geometrical quality was examined. From...

...Mengqi Yuan; David L. Bourell Purpose – The purpose of this paper is to report selected optical properties of laser sintered polyamide 12 blank plates under different monochromatic and white light conditions and to apply these properties in production of laser sintered lithophanes. Design...

... of the processing methods injection moulding and laser sintering. Design/methodology/approach – Test specimens are subjected to a cyclic stress of defined bending, cleaning, disinfection and sterilization. The focus of interest in this research is the degradation and reduction of mechanical properties...

...Javier Munguia; Kenny Dalgarno Purpose – The purpose of this paper was twofold: first, to determine if rotating bending could be used as an effective way of determining the fatigue behaviour of laser-sintered nylon, and second, to examine whether the fatigue behaviour of laser-sintered PA12...

...Andrew Johnson; Guy A. Bingham; David I. Wimpenny Purpose The purpose of this paper is to ascertain the stab resistance characteristics of a series of planar and articulated laser sintered (LS) samples, in accordance with the United Kingdom Home Office Scientific Development Branch (HOSDB) Body...

...Barry Haworth; Neil Hopkinson; David Hitt; Xiaotao Zhong Purpose Laser sintering kinetics and part reliability are critically dependent on the melt viscosity of materials, including polyamide 12 (PA‐12). The purpose of this paper is to characterise the viscosity of PA‐12 powders using alternative...

...Monika Blattmeier; Gerd Witt; Johannes Wortberg; Jan Eggert; Jochen Toepker Purpose The purpose of this paper is to provide macromechanical insight into the fatigue behaviour of laser sintered parts and to understand the influence of the laser sintered surface structure on this behaviour...