scholarly journals Evaluation of Stereolithography-Based Additive Manufacturing Technology for BaTiO3 Ceramics at 465 nm

2022 ◽  
Vol 12 (1) ◽  
pp. 412
Author(s):  
Svyatoslav Chugunov ◽  
Andrey Smirnov ◽  
Anastasia Kholodkova ◽  
Andrey Tikhonov ◽  
Oleg Dubinin ◽  
...  
Keyword(s):  
3D Printing ◽  
Spectral Range ◽  
Spectral Shift ◽  
Spectral Change ◽  
Optical Analysis ◽  
3D Printers ◽  
3D Printed ◽  
Light Absorbance ◽  
Positive Effect ◽  
Powder Fraction

A piezoceramic BaTiO3 material that is difficult for 3D printing was tested with a homemade laser-based stereolithography (SLA) setup. The high light absorbance of BaTiO3 in the spectral range of 350–410 nm makes this material hardly usable with most commercial SLA 3D printers. The typical polymerization depth of BaTiO3 ceramic pastes in this spectral range hardly reaches 30–50 µm for 40 vol % powder loading. A spectral change to 465 nm was realized in this work via a robot-based experimental SLA setup to improve the 3D printing efficiency. The ceramic paste was prepared from a preconditioned commercial BaTiO3 powder and used for 3D printing. The paste’s polymerization was investigated with variation of powder fraction (10–55 vol %), speed of a laser beam (1–10 mm/s, at constant laser power), and a hatching spacing (100–1000 µm). The polymerization depths of over 100 µm were routinely reached with the 465 nm SLA for pastes having 55 vol % powder loading. The spectral shift from 350–410 nm spectral region to 465 nm reduced the light absorption by BaTiO3 and remedied the photopolymerization process, emphasizing the importance of comprehensive optical analysis of prospective powders in SLA technology. Two multi-layered objects were 3D-printed to demonstrate the positive effect of the spectral shift.

Designing Inclusion: Using 3D Printing to Maximize Adapted Physical Education Participation

2021 ◽  
pp. 004005992110101
Author(s):  
A. Chloe Simpson ◽  
Andrea Ruth Taliaferro
Keyword(s):  
3D Printing ◽  
Student Success ◽  
Assistive Technology ◽  
Adapted Physical Education ◽  
Physical Educators ◽  
Related Service ◽  
3D Printers ◽  
3D Printed ◽  
Education Participation ◽  
Individual Design

While assistive technology is often suggested as a way to increase, maintain, or improve functional ability for individuals with disabilities within physical activity (PA) settings, cost and availability of such items are often noted as barriers. In recent years, 3D printing has become available to the general public through the adoption of 3D printers in schools, libraries, and universities. Through individual design and rapid prototyping, 3D printing can support physical educators in accommodating student need for assistive technology through a multitude of modification possibilities. This article will highlight the capacity for 3D printed assistive technology within educational settings, and will illustrate how teachers, APE specialists, and other related service personnel can utilize this technology to support student success in PE and PA settings. This article will also assist practitioners with locating, uploading, and utilizing existing collections of 3D assistive technology models from open-source websites, such as Thingiverse.

scholarly journals Evaluation of the Ability to Accurately Produce Angular Details by 3D Printing of Plastic Parts

Machines ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 150
Author(s):  
Andrei Marius Mihalache ◽  
Gheorghe Nagîț ◽  
Laurențiu Slătineanu ◽  
Adelina Hrițuc ◽  
Angelos Markopoulos ◽  
...  
Keyword(s):  
3D Printing ◽  
Point Of View ◽  
Vertex Angle ◽  
Function Type ◽  
Constant Height ◽  
3D Printers ◽  
3D Printed ◽  
Mathematical Processing ◽  
Plastic Parts

3D printing is a process that has become widely used in recent years, allowing the production of parts with relatively complicated shapes from metallic and non-metallic materials. In some cases, it is challenging to evaluate the ability of 3D printers to make fine details of parts. For such an assessment, the printing of samples showing intersections of surfaces with low angle values was considered. An experimental plan was designed and materialized to highlight the influence of different factors, such as the thickness of the deposited material layer, the printing speed, the cooling and filling conditions of the 3D-printed part, and the thickness of the sample. Samples using areas in the form of isosceles triangles with constant height or bases with the same length, respectively, were used. The mathematical processing of the experimental results allowed the determination of empirical mathematical models of the power-function type. It allowed the detection of both the direction of actions and the intensity of the influence exerted by the input factors. It is concluded that the strongest influence on the printer’s ability to produce fine detail, from the point of view addressed in the paper, is exerted by the vertex angle, whose reduction leads to a decrease in printing accuracy.

scholarly journals Consumer vs. High-End 3D Printers for Guided Implant Surgery—An In Vitro Accuracy Assessment Study of Different 3D Printing Technologies

2021 ◽  
Vol 10 (21) ◽  
pp. 4894
Author(s):  
Lukas Wegmüller ◽  
Florian Halbeisen ◽  
Neha Sharma ◽  
Sebastian Kühl ◽  
Florian M. Thieringer
Keyword(s):  
3D Printing ◽  
Accuracy Assessment ◽  
Subjective Assessment ◽  
Fused Filament Fabrication ◽  
Digital Light Processing ◽  
Implant Surgery ◽  
Surgical Guides ◽  
3D Printers ◽  
3D Printed

This study evaluates the accuracy of drill guides fabricated in medical-grade, biocompatible materials for static, computer-aided implant surgery (sCAIS). The virtually planned drill guides of ten completed patient cases were printed (n = 40) using professional (Material Jetting (MJ)) and consumer-level three-dimensional (3D) printing technologies, namely, Stereolithography (SLA), Fused Filament Fabrication (FFF), and Digital Light Processing (DLP). After printing and post-processing, the drill guides were digitized using an optical scanner. Subsequently, the drill guide’s original (reference) data and the surface scans of the digitized 3D-printed drill guide were superimposed to evaluate their incongruencies. The accuracy of the 3D-printed drill guides was calculated by determining the root mean square (RMS) values. Additionally, cast models of the planned cases were used to check that the drill guides fitted manually. The RMS (mean ± SD) values for the accuracy of 3D-printed drill guides were—MJ (0.09 ± 0.01 mm), SLA (0.12 ± 0.02 mm), FFF (0.18 ± 0.04 mm), and DLP (0.25 ± 0.05 mm). Upon a subjective assessment, all drill guides could be mounted on the cast models without hindrance. The results revealed statistically significant differences (p < 0.01) in all except the MJ- and SLA-printed drill guides. Although the measured differences in accuracy were statistically significant, the deviations were negligible from a clinical point of view. Within the limits of this study, we conclude that consumer-level 3D printers can produce surgical guides with a similar accuracy to a high-end, professional 3D printer with reduced costs.

scholarly journals Dimensional Stability of 3D Printed Objects Made from Plastic Waste Using FDM: Potential Construction Applications

Buildings ◽  
2021 ◽  
Vol 11 (11) ◽  
pp. 516
Author(s):  
Essam Zaneldin ◽  
Waleed Ahmed ◽  
Aya Mansour ◽  
Amged El Hassan
Keyword(s):  
3D Printing ◽  
Construction Projects ◽  
Fused Deposition Modeling ◽  
Three Dimensional ◽  
Cost Effective ◽  
Plastic Waste ◽  
Fused Deposition ◽  
Feasible Option ◽  
3D Printers ◽  
3D Printed

Construction projects are often challenged by tight budgets and limited time and resources. Contractors are, therefore, looking for ways to become competitive by improving efficiency and using cost-effective materials. Using three-dimensional (3D) printing for shaping materials to produce cost-effective construction elements is becoming a feasible option to make contractors more competitive locally and globally. The process capabilities for 3D printers and related devices have been tightened in recent years with the booming of 3D printing industries and applications. Contractors are attempting to improve production skills to satisfy firm specifications and standards, while attempting to have costs within competitive ranges. The aim of this research is to investigate and test the production process capability (Cp) of 3D printers using fused deposition modeling (FDM) to manufacture 3D printed parts made from plastic waste for use in the construction of buildings with different infill structures and internal designs to reduce cost. This was accomplished by calculating the actual requirement capabilities of the 3D printers under consideration. The production capabilities and requirements of FDM printers are first examined to develop instructions and assumptions to assist in deciphering the characteristics of the 3D printers that will be used. Possible applications in construction are then presented. As an essential outcome of this study, it was noticed that the 3D printed parts made from plastic waste using FDM printers are less expensive than using traditional lightweight non-load bearing concrete hollow masonry blocks, hourdi slab hollow bocks, and concrete face bricks.

scholarly journals Design of 3D Printing Thermo-Sensored Medical Gear in Detecting COVID-19 Symptoms

2021 ◽  
Vol 11 (1) ◽  
pp. 419
Author(s):  
Milena Djukanović ◽  
Ardijan Mavrić ◽  
Jovana Jovanović ◽  
Milovan Roganović ◽  
Velibor Bošković
Keyword(s):  
3D Printing ◽  
Medical Staff ◽  
Medical Equipment ◽  
Protective Equipment ◽  
Body Temperatures ◽  
Medical Facilities ◽  
The World ◽  
3D Printers ◽  
3D Printed ◽  
Second Wave

Shortly after the outbreak of the COVID-19 pandemic, there was a need to provide protective equipment to the medical facilities whose supplies were threatened to be depleted. Just like many countries in Europe, Montenegro responded to the need for medical equipment by using the advantages of 3D printers while establishing a state network of production hubs, ensuring closed connectivity, communication, and the mutual fulfilment of personal protective equipment (PPE) demands whenever and wherever required. With the second wave of the pandemic, Montenegro rose to second place in the world with the number of coronavirus cases, which also led to an increasing number of infected medical staff. Since fever is a frequent symptom of SA+RS-CoV2 infection, a type of innovative 3D-printed thermo-sensored medical gear has been designed and tested in hospital conditions. This medical gear shaped like a bracelet, which changes color in the presence of high human body temperatures, proves to be efficient and easy to use for medical staff as well as patients.

Mechanical Properties of 3D Printed Fiber Reinforced Thermoplastic

2019 ◽  
Author(s):  
Seyed Hamid Reza Sanei ◽  
Zack Lash ◽  
Josh Servey ◽  
Frank Gardone ◽  
Chetan P. Nikhare
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
High Strength ◽  
Recent Improvement ◽  
Manufacturing Method ◽  
Matrix Properties ◽  
The Matrix ◽  
Continuous Carbon Fiber ◽  
3D Printers ◽  
3D Printed

Abstract 3D printed composites is a relatively new and untested market in the composites industry. 3D printing in general is becoming a widely used manufacturing method because of its ease, versatile capabilities, and consistency. Recent improvement in 3D printing enables 3D printing of composites fibers in any given direction. In this study, continuous carbon fiber onyx samples were manufactured using Markforged X7 3D printers. Samples with three different fiber orientations were manufactured to determine all elastic properties. The results show that while the properties are lower than high strength CFRPs, there is high potential for the use of 3D printed composites upon improving the matrix properties as well as the bonding between fiber and matrix.

scholarly journals Optimization of community-led 3D printing for the production of protective face shields

2020 ◽  
Vol 6 (1) ◽  
Author(s):  
Peter Chengming Zhang ◽  
Yousuf Ahmed ◽  
Isra M. Hussein ◽  
Edem Afenu ◽  
Manon Feasson ◽  
...  
Keyword(s):  
3D Printing ◽  
Health Workers ◽  
Production Capacity ◽  
Start Time ◽  
Case Presentation ◽  
Global Pandemic ◽  
The Face ◽  
3D Printers ◽  
3D Printed

Abstract Background As the healthcare system faced an acute shortage of personal protective equipment (PPE) during the COVID-19 pandemic, the use of 3D printing technologies became an innovative method of increasing production capacity to meet this acute need. Due to the emergence of a large number of 3D printed face shield designs and community-led PPE printing initiatives, this case study examines the methods and design best optimized for community printers who may not have the resources or experience to conduct such a thorough analysis. Case presentation We present the optimization of the production of 3D printed face shields by community 3D printers, as part of an initiative aimed at producing PPE for healthcare workers. The face shield frames were manufactured using the 3DVerkstan design and were coupled with an acetate sheet to assemble a complete face shield. Rigorous quality assurance and decontamination protocols ensured community-printed PPE was satisfactory for healthcare use. Conclusion Additive manufacturing is a promising method of producing adequate face shields for frontline health workers because of its versatility and quick up-start time. The optimization of stacking and sanitization protocols allowed 3D printing to feasibly supplement formal public health responses in the face of a global pandemic.

scholarly journals On the intrinsic sterility of 3D printing

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2661 ◽  
Author(s):  
Russell Y. Neches ◽  
Kaitlin J. Flynn ◽  
Luis Zaman ◽  
Emily Tung ◽  
Nicholas Pudlo
Keyword(s):  
Cell Culture ◽  
3D Printing ◽  
Fabrication Process ◽  
3D Printers ◽  
3D Printed

3D printers that build objects using extruded thermoplastic are quickly becoming commonplace tools in laboratories. We demonstrate that with appropriate handling, these devices are capable of producing sterile components from a non-sterile feedstock of thermoplastic without any treatment after fabrication. The fabrication process itself results in sterilization of the material. The resulting 3D printed components are suitable for a wide variety of applications, including experiments with bacteria and cell culture.

scholarly journals Digital orthodontic indirect bonding systems: A new wave

2020 ◽  
Vol 10 ◽  
pp. 195-200
Author(s):  
Nasib Balut ◽  
Digant P. Thakkar ◽  
Enrique Gonzalez ◽  
Rodrigo Eluani ◽  
Luis David Silva
Keyword(s):  
3D Printing ◽  
Digital Technologies ◽  
New Wave ◽  
Orthodontic Bracket ◽  
Indirect Bonding ◽  
3D Printers ◽  
3D Printed ◽  
Orthodontic Bonding ◽  
Bonding Systems ◽  
Bracket Positioning

Digital technologies are progressing with leaps and bounds and the field of orthodontics is not untouched by it, with innovations like intraoral scanners and 3D printers being easy to own and maintain and increased availability of biocompatible 3D printing materials orthodontist are curious to use this technology to improve orthodontic bracket positioning which would require minimal to no repositioning during the course of treatment. The authors here have tried to outline 2 different methods using CBCT and VTO as guide to decide the bracket positioning digitally and using 3D printed Indirect Bonding trays for orthodontic bonding.

scholarly journals Design and Analysis of 3d Printed Gear for Automobile Wind Wiper

2019 ◽  
Vol 8 (4) ◽  
pp. 9302-9306
Keyword(s):  
Lactic Acid ◽  
3D Printing ◽  
High Precision ◽  
Cost Effective ◽  
Poly Lactic Acid ◽  
Deposition Method ◽  
3D Printers ◽  
3D Printed ◽  
Printing Machine ◽  
State Of Art

This Work Presents The State Of Art Concerning The Current Achievements In The Field Of 3d Printing. 3d Printing Offers Many Advantages In The Fabrication Of Composites, Including High Precision, Cost Effective, Minimize Time And Customized Geometry. Creation Of An Appropriate Model To Manufacture A Product Using 3d Printers Is Possible With The Help Of Various Modelling Programs Or Software. One Of The Most Popular Formats For Sharing Such Models Is Stl (Standard Triangle Language) Format. In This Paper, Automobile Wind Wiper Gear Is Modelled Using Autodesk Fusion-360 Software And Fusion Deposition Method (Fdm) Process Is Used For Printing The Gear In 3d Printing Machine With Pla (Poly Lactic Acid) Material To Print The Selected Automobile Gear And Its Analysis Is Performed

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