Surface treatment of incrementally produced components in FFF (Fused Filament Fabrication) technology

The paper provides an overview of ways to increase the strength of polymer products obtained by fused filament fabrication (FFF) technology. An algorithm for calculating the spiral toolpaths for the material deposition using multi-axis printing is proposed. The design of the five-axis device for spiral-shaped deposition of the material is shown. The description of the proposed printing method is given. The results of comparative three-point bend and compression tests are presented. The standard samples obtained in the usual way by FFF technology, as well as samples with 2, 4, 6, 8 and 10 reinforcing layers obtained by spiral deposition of the material were investigated. The description of the tests is given, the dependences of the strength of the products on the number of reinforcing layers are obtained. Conclusions about the influence of the layer deposition method on the strength of the products are formulated.

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Monitoring of critical processing steps during the production of high dense 3D alumina parts using Fused Filament Fabrication technology

Additive Manufacturing ◽

10.1016/j.addma.2021.102395 ◽

2021 ◽

Vol 48 ◽

pp. 102395

Author(s):

M. Orlovská ◽

M. Hain ◽

M. Kitzmantel ◽

P. Veteška ◽

Z. Hajdúchová ◽

...

Keyword(s):

Fabrication Technology ◽

Fused Filament Fabrication ◽

Processing Steps

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Effects of Size and Surface Treatment on Fatigue Life of Fused Filament Fabrication (FFF) Manufactured Acrylonitrile Butadiene Styrene (ABS) Parts

Journal of Manufacturing Science and Engineering ◽

10.1115/1.4050178 ◽

2021 ◽

pp. 1-15

Author(s):

Jianchi Huang ◽

Eduardo Miscles ◽

Tara Mellor ◽

Chao Ma ◽

Mathew A. Kuttolamadom ◽

...

Keyword(s):

Fatigue Life ◽

Surface Treatment ◽

Smooth Surface ◽

Acrylonitrile Butadiene Styrene ◽

Fiber Direction ◽

Fused Filament Fabrication ◽

Internal Damage ◽

Great Probability ◽

Four Levels ◽

Butadiene Styrene

Abstract An experimental study was conducted to investigate the effects of size and surface treatment on fatigue life of fused filament fabrication (FFF) manufactured acrylonitrile butadiene styrene (ABS) parts. Moore rotating beam fatigue tests were conducted with four levels of loading to obtain the S-N curves. Two different sizes and three different surface treatment methods (as printed, acetone treated, and sandpaper polished) were studied. The larger specimens had significantly decreased fatigue life because of a larger volume, and hence a great probability of defects for crack initiation and propagation, as compared to the control specimen. The acetone treated specimen had a smooth surface. Its fatigue life, however, decreased significantly because the acetone treatment caused internal damage that weakened the specimen. The sandpaper treated specimen also had a smooth surface, but its effect on the fatigue life was insignificant because the fiber direction on the specimen surface was parallel to the loading direction. The present results lead to a better understanding of the effects of geometric size and surface treatment on fatigue performance of FFF specimens. The study also provides important insights for the design of part size and surface treatment of 3D printed plastic components for fatigue loading applications.

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Design and Fabrication of Strong Parts from Poly (Lactic Acid) with a Desktop 3D Printer: A Case with Interrupted Shell

Polymers ◽

10.3390/polym11050760 ◽

2019 ◽

Vol 11 (5) ◽

pp. 760 ◽

Cited By ~ 8

Author(s):

Kuznetsov ◽

Tavitov ◽

Urzhumtsev ◽

Mikhalin ◽

Solonin

Keyword(s):

Poly Lactic Acid ◽

Bottom Surface ◽

Fabrication Technology ◽

Shape Modification ◽

Fused Filament Fabrication ◽

Flat Surfaces ◽

Sample Shape ◽

Low Weight ◽

Dense Shell ◽

Typical Part

The ability to form closed cavities inside the part printed is an important feature of Fused Filament Fabrication technology. A typical part consists of a dense shell bearing the primary load, filled with low-density plastic scaffold (infill). Such a constitution of the part provides in most cases appropriate strength and low weight. However, if the printed part shape includes horizontal (orthogonal to printer’s Z axis) flat surfaces other than its top and bottom surface, then the shell of the part becomes interrupted, which may lead to drastic drop in the ability of the part to withstand loads. In the current study, a representative sample of a part with interrupted shell and testing apparatus is developed. Influence of shell and base thicknesses, as well as influence of the infill density on the part strength, are studied. Different approaches to the sample shape modification were applied and tested. The part shape optimization made with respect to peculiarities of Fused Filament Fabrication technology resulted in increment of the force, required to fracture the part from 483 to 1096 N and in decreased part mass from 36.9 to 30.2 g.

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Application Possibilities of Fused Filament Fabrication Technology for High-Voltage and Medium-Voltage Insulation Systems

2019 42nd International Spring Seminar on Electronics Technology (ISSE) ◽

10.1109/isse.2019.8810300 ◽

2019 ◽

Author(s):

Tomas Tichy ◽

Ondrej Sefl ◽

Petr Vesely ◽

Tomas Capal

Keyword(s):

High Voltage ◽

Fabrication Technology ◽

Fused Filament Fabrication ◽

Medium Voltage ◽

Insulation Systems

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Surface treatment with silver particles isles on Titanium cp: study of antimicrobial activity

Research Society and Development ◽

10.33448/rsd-v9i4.2662 ◽

2020 ◽

Vol 9 (4) ◽

pp. e27942662

Author(s):

Patrícia Capellato ◽

Cláudia Eliana Bruno Marino ◽

Gilbert Silva ◽

Lucas Victor Benjamim Vasconcelos ◽

Rodrigo Perito Cardoso ◽

...

Keyword(s):

Antimicrobial Activity ◽

Surface Treatment ◽

Titanium Surface ◽

Silver Clusters ◽

Silver Particles ◽

Silver Deposition ◽

Dispersed Particles ◽

Significant Difference ◽

Diffusion Assay ◽

Antibacterial Potential

During the last decades, researchers have been growing the interest in surface treatment with an antimicrobial agent. Silver nanoparticles (AgNPs) are widely used in biomedical fields due to their potent antimicrobial activity. So, in this study was investigated silver particles (isles) coated on titanium surface for dental and orthopedic application. Silver particles coating process on titanium surface were performed via sputtering that is a plasma-assisted deposition technique with and titanium without treatment was applied as comparing standard. Plasma treatment parameters were optimized so that the result was not a thin film of Ag but dispersed particles of Ag on the Ti-cp surface. The alloy surfaces were investigated using scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). In order to investigate antibacterial potential Staphylococcus aureus and Escherichia coli have been used at Agar diffusion assay. The results were analyzed by analysis of variance (ANOVA) in order to verify significant difference antimicrobial activity between samples that have shown no difference between the surfaces studied treatments. For silver deposition scattered particles (isles) over titanium surface for a 10-minute treatment, EDS revealed by silver clusters that the particles were not properly scattered onto surface, hence, the low effectiveness in antibacterial activity.

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