Sustainable 3D Printed Composites from Recycled Ocean Plastics and Pyrolyzed Soy-Hulls: Optimization of Printing Parameters, Performance Studies and Prototypes Development

The article presents the study of the application of 3D printing technology for rapid tooling in sheet metal forming for custom or small–lot manufacturing. The main issue of the usage of 3D printing technology for die tooling was discovered. It is proposed to use the method of mathematical modelling to investigate how the printing parameters affect the compressive strength of FDM 3D–printed parts. Using expert research methods, the printing parameters most strongly affecting the strength of products were identified for further experiments. A method for testing the strength of 3D–printed materials has been developed and tested.

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Strength Comparison of FDM 3D Printed PLA Made by Different Manufacturers

TEM Journal ◽

10.18421/tem93-18 ◽

2020 ◽

pp. 966-970

Author(s):

Damir Hodžić ◽

Adi Pandžić ◽

Ismar Hajro ◽

Petar Tasić

Keyword(s):

Experimental Study ◽

Additive Manufacturing ◽

Fused Deposition Modelling ◽

Fused Deposition ◽

Manufacturing Technique ◽

Plastic Materials ◽

Wide Range ◽

3D Printed ◽

The Difference ◽

Printing Parameters

Widely used additive manufacturing technique for plastic materials is Fused Deposition Modelling (FDM). The FDM technology has gained interest in industry for a wide range of applications, especially today when large number of different materials on the market are available. There are many different manufacturers for the same FDM material where the difference in price goes up to 50%. This experimental study investigates possible difference in strength of the 3D printed PLA material of five different manufacturers. All specimens are 3D printed on Ultimaker S5 printer with the same printing parameters, and they are all the same colour.

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Effect of printing parameters on interlayer bond strength of 3D printed limestone-calcined clay-based cementitious materials: An experimental and numerical study

Construction and Building Materials ◽

10.1016/j.conbuildmat.2020.120094 ◽

2020 ◽

Vol 262 ◽

pp. 120094 ◽

Cited By ~ 2

Author(s):

Yu Chen ◽

Koen Jansen ◽

Hongzhi Zhang ◽

Claudia Romero Rodriguez ◽

Yidong Gan ◽

...

Keyword(s):

Bond Strength ◽

Numerical Study ◽

Cementitious Materials ◽

Calcined Clay ◽

3D Printed ◽

Printing Parameters ◽

Interlayer Bond

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Properties and applications of electrically conductive thermoplastics for additive manufacturing of sensors

tm - Technisches Messen ◽

10.1515/teme-2016-0057 ◽

2017 ◽

Vol 84 (9) ◽

Cited By ~ 6

Author(s):

Benedikt Hampel ◽

Samuel Monshausen ◽

Meinhard Schilling

Keyword(s):

3D Printing ◽

Fused Deposition Modeling ◽

Electrical Conductance ◽

Electrically Conductive ◽

Fused Deposition ◽

Printing Technique ◽

Deposition Modeling ◽

3D Printed ◽

3D Printing Technique ◽

Printing Parameters

AbstractIn consequence of the growing diversity of materials in the fused deposition modeling 3D printing technique, electrically conductive materials are commercially available. In this work two filaments based on thermoplastics filled with carbon or metal nanoparticles are analyzed in terms of their electrical conductance. The printing parameters to process the materials with the 3D printer are optimized with the design of experiments (DoE) method. A model to calculate the resistance of such 3D printed structures is presented and a demonstrator as a proof of concept was 3D printed based on these results. In addition, 3D printing of capacitors is investigated.

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Effect of 3D Printing Parameters on the Refractive Index, Attenuation Coefficient, and Birefringence of Plastics in Terahertz Range

Advances in Materials Science and Engineering ◽

10.1155/2021/8276378 ◽

2021 ◽

Vol 2021 ◽

pp. 1-9

Author(s):

Alexander T. Clark ◽

John F. Federici ◽

Ian Gatley

Keyword(s):

Refractive Index ◽

3D Printing ◽

Attenuation Coefficient ◽

Refractive Indices ◽

Attenuation Coefficients ◽

Layer Height ◽

Nozzle Size ◽

3D Printed ◽

Printing Parameters ◽

Real Refractive Index

The refractive indices, attenuation coefficients, and level of birefringence of various 3D printing plastics may change depending on the printing parameters. Transmission terahertz time-domain spectroscopy was used to look for such effects in Copolyester (CPE), Nylon, Polycarbonate (PC), Polylactic acid, and Polypropylene. The thickness of each sample was measured using an external reference structure and time-of-flight measurements. The parameters varied were printer nozzle size, print layer height, and print orientation. Comparison of these parameters showed that a printer’s nozzle size and print layer height caused no change in real refractive index or attenuation coefficient. A change in printing orientation from vertical to horizontal caused an increase both in real refractive index and in attenuation coefficient. In vertically printed samples, the increase in birefringence was proportional to the increase in layer height and inversely proportional to nozzle size. There was no measurable intrinsic birefringence in the horizontally printed samples. These effects should be taken into account in the design of FDM 3D printed structures that demand tailored refractive indices and attenuation coefficients, while also providing a foundation for nondestructive evaluation of FDM 3D printed objects and structures.

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Printability of 3D Printed Hydrogel Scaffolds: Influence of Hydrogel Composition and Printing Parameters

Applied Sciences ◽

10.3390/app10010292 ◽

2019 ◽

Vol 10 (1) ◽

pp. 292 ◽

Cited By ~ 8

Author(s):

Saman Naghieh ◽

MD Sarker ◽

N. K. Sharma ◽

Zohra Barhoumi ◽

Xiongbiao Chen

Keyword(s):

Flow Behavior ◽

Three Dimensional ◽

Methyl Cellulose ◽

Alginate Hydrogel ◽

Hydrogel Scaffolds ◽

Number Of Factors ◽

3D Printed ◽

The Difference ◽

Printing Processes ◽

Printing Parameters

Extrusion-based bioprinting of hydrogel scaffolds is challenging due to printing-related issues, such as the lack of capability to precisely print or deposit hydrogels onto three-dimensional (3D) scaffolds as designed. Printability is an index to measure the difference between the designed and fabricated scaffold in the printing process, which, however, is still under-explored. While studies have been reported on printing hydrogel scaffolds from one or more hydrogels, there is limited knowledge on the printability of hydrogels and their printing processes. This paper presented our study on the printability of 3D printed hydrogel scaffolds, with a focus on identifying the influence of hydrogel composition and printing parameters/conditions on printability. Using the hydrogels synthesized from pure alginate or alginate with gelatin and methyl-cellulose, we examined their flow behavior and mechanical properties, as well as their influence on printability. To characterize the printability, we examined the pore size, strand diameter, and other dimensions of the printed scaffolds. We then evaluated the printability in terms of pore/strand/angular/printability and irregularity. Our results revealed that the printability could be affected by a number of factors and among them, the most important were those related to the hydrogel composition and printing parameters. This study also presented a framework to evaluate alginate hydrogel printability in a systematic manner, which can be adopted and used in the studies of other hydrogels for bioprinting.

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