Experimental Investigations and Parametric Optimization of Process Parameters on Shrinkage Characteristics of Selective Inhibition Sintered High Density Polyethylene Parts

Rajamani, D.; Esakki, Balasubramanian; Arunkumar, P.; Silambarasan, M.; Bhuvaneshwaran, G.

doi:10.1007/s40799-018-0286-6

Cited by 22 publications

(12 citation statements)

References 32 publications

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“…Much of the existing research centers on the use of 3D printing to create parts with enhanced mechanical properties (Maurath and Willenbacher 2017;Al-Qutaifi et al 2018;Kuznetsov et al 2018). However, fewer studies have comprehensively quantified the effects of various printing process parameters, acting individually and in combination, on the dimensional stability of the final part (Ippolito et al 1995;Dimitrov, van Wijck, et al 2006;Mantada et al 2017;Rajamani et al 2018). In a recent study, Dixit et al (2016) examined the effect of raster width, slice height, and path speed on the FDM process.…”

Section: The Purpose Of This Study Was To Examine the Effects Of 4 Spmentioning

confidence: 99%

Dimensional Stability of 3D Printed Parts: Effects of Process Parameters

Azhikannickal

Uhrin

2019

OJS

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The three-dimensional (3D) printing manufacturing process begins with the creation of a 3D model—using computer aided design (CAD) software—of the part to be printed. Using a type of 3D printing known as fused deposition modeling (FDM®), the 3D printer extrudes molten plastic to scan lines to create individual layers (i.e., the infill): one on top of the other. (Note that "scan" in this context refers to the movement of the extruder head, along an x,y coordinate path, while depositing molten plastic.) This process is repeated until the overall geometry, specified by the 3D model, is built. This process is attractive for producing proof of concept or prototype parts in various fields including automotive, aerospace, and medical. However, FDM subjects the material to rapid heating and cooling; therefore, some degree of undesirable warpage of the part occurs post fabrication. The primary objective of this study was to determine the effect of 4 process parameters (i.e., infill shape, infill density, number of perimeters created per layer, and layer height) on the total dimensional error of a representative 3D-printed part. This part (the "simple part"), used in Trials 1 through 3 of this study, was a square acrylonitrile butadiene styrene (ABS) plate having a nominal measurement of 50 mm × 50 mm × 5 mm thick. A residual error (the difference between the measured post-printing dimension and the theoretical CAD file dimension) was calculated along each given direction and for each test print. Finally, a root mean square (RMS) error (i.e., the square root of the average of the squared residual errors along the length, width, and thickness directions) was calculated for each printed part. Three repeat test prints were carried out for each parameter. The number of perimeters played a key role in the dimensional stability of the part. As the number of perimeters increased up to 5, the RMS error decreased. Beyond 5 perimeters, however, the RMS error increased due to excessive warpage/curvature at the corners of the part. Ultimately, when examined individually, a grid infill shape at 100% density, a 0.4 mm layer height, and 5 perimeters each produced the lowest warpage. In combination, these same 4 parameters also produced the lowest RMS error (based on dimensional analysis of 3 test prints) when used to print a more complicated part (the "stacked part") in Trial 4.

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Section: The Purpose Of This Study Was To Examine the Effects Of 4 Spmentioning

confidence: 99%

Dimensional Stability of 3D Printed Parts: Effects of Process Parameters

Azhikannickal

Uhrin

2019

OJS

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“…Although several articles report the electrical conductivity performance of the printed circuits fabricated by D.I.W method using different conductive inks, optimization parameters that influence the electrical conductivity response of the printed circuits is very essential to be considered. Process parameters used in D.I.W pneumatic extrusion based 3D printing have been shown to have influence on electrical conductivity [36][37][38][39][40], dimensional error and surface roughness [41], layer flatness and interfacial strength [42] of the printed circuits. Hagen et al reported the influence of printing speed, raster angle, flow rate, extrusion temperature on electrical characterization of the circuits printed using carbon black (CB), CNT, copper nanowires and analysed that optimization of raster angle, extrusion temperature play a vital role in printing circuits with highest conductivity [36].…”

Section: Introductionmentioning

confidence: 99%

Optimization parameters effects on electrical conductivity of 3D printed circuits fabricated by direct ink writing method using functionalized multiwalled carbon nanotubes and polyvinyl alcohol conductive ink

Ahammed

Praveen

2021

Int. J. Simul. Multidisci. Des. Optim.

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Fabrication of electronic circuits and the effects of optimization parameters on electrical conductivity of the printed circuits fabricated by direct ink writing method (D.I.W); one of the novel methods in 3D printing technologies is discussed in this work. This paper focuses on fabrication of electronic circuits using F-MWCNT/PVA conductive ink and analyses the effect of input printing process parameters namely nozzle diameter, extrusion pressure, printing speed on evaluating the electrical conductivity. Box–Behnken approach is followed to generate the levels of experiments and the performance of developed model is assessed using ANOVA. Response surface method is incorporated to find the influencing parameters on electrical conductivity response. Two-point probe measurement method is performed to analyse the output response of the printed electronic circuits. Optimized printing parameters such as nozzle diameter of 0.8 mm, extrusion pressure of 0.1 MPa and printing speed of 4 mm/sec are found to be the best the for printing electronic circuits with high electrical conductivity.

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“…They proposed that the applied heat energy and layer thickness prominently influenced the wear resistance of sintered parts. Rajamani et al [17] studied the shrinkage characteristics of SIS processed HDPE parts using RSM and desirability approach. They have found that the shrinkage of sintered specimens significantly influenced by heater energy and layer thickness.…”

Section: Introductionmentioning

confidence: 99%

Effects of heat energy on morphology and properties of selective inhibition sintered high density polyethylene

Rajamani

Esakki

2019

JMES

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This study provides an account of comprehensive experimentation and mechanical characterisation of high density polyethylene (HDPE) parts that are fabricated through an additive manufacturing process called selective inhibition sintering (SIS). In this study, test specimens are fabricated by selective fusing of HDPE particles through controlled heating. Morphological studies and mechanical property evaluation of these specimens are carried out to assess the impact of energy on sintering of HDPE particles and structural integrity. Results indicate that, heat energy up to a threshold level of 28.48 J/mm2 results in superior fusion of the HDPE particles, and further increase causes degradation of the structure. Surface roughness, tensile and flexural properties of SIS parts are compared with those of injection moulded parts for assessing their suitability to engineering applications.

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Experimental Investigations and Parametric Optimization of Process Parameters on Shrinkage Characteristics of Selective Inhibition Sintered High Density Polyethylene Parts

Cited by 22 publications

References 32 publications

Dimensional Stability of 3D Printed Parts: Effects of Process Parameters

Dimensional Stability of 3D Printed Parts: Effects of Process Parameters

Optimization parameters effects on electrical conductivity of 3D printed circuits fabricated by direct ink writing method using functionalized multiwalled carbon nanotubes and polyvinyl alcohol conductive ink

Effects of heat energy on morphology and properties of selective inhibition sintered high density polyethylene

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