scholarly journals Morphology of Models Manufactured by SLM Technology and the Ti6Al4V Titanium Alloy Designed for Medical Applications

Materials ◽  
2021 ◽  
Vol 14 (21) ◽  
pp. 6249
Author(s):  
Damian Gogolewski ◽  
Tomasz Kozior ◽  
Paweł Zmarzły ◽  
Thomas G. Mathia
Keyword(s):  
3D Printing ◽  
Process Control ◽  
Femoral Stem ◽  
Additive Technology ◽  
Qualitative And Quantitative ◽  
Surface Control ◽  
3D Printers ◽  
Printing Direction ◽  
Specific Degree ◽  
Printing Machine

This paper presents the results of an experimental study to evaluate the possibility of using SLM additive technology to produce structures with specific surface morphological features. Qualitative and quantitative tests were conducted on samples fabricated by 3D printing from titanium (Ti6Al4V)-powder-based material and analysed in direct relation to the possibility of their use in medicine for the construction of femoral stem and models with a specific degree of porosity predicted by process-control in the self-decision-making 3D printing machine. This paper presents the results of the study, limitations of the method, recommendations that should be used in the design of finished products, and design proposals to support the fabrication process of 3D printers. Furthermore, the study contains an evaluation of how the printing direction affects the formation of certain structures on the printed surface. The research can be used in the development of 3D printing standardization, particularly in the consideration of process control and surface control.

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

scholarly journals A study of tensile and bending properties of 3D-printed biocompatible materials used in dental appliances

2022 ◽  
Author(s):  
Marcos García Reyes ◽  
Alex Bataller Torras ◽  
Juan A. Cabrera Carrillo ◽  
Juan M. Velasco García ◽  
Juan J. Castillo Aguilar
Keyword(s):  
Mechanical Properties ◽  
3D Printing ◽  
Biocompatible Materials ◽  
Rupture Stress ◽  
Bending Tests ◽  
Wide Range ◽  
3D Printers ◽  
Materials Used ◽  
Manufacturing Technologies ◽  
Printing Direction

AbstractIn the last years, a large number of new biocompatible materials for 3D printers have emerged. Due to their recent appearance and rapid growth, there is little information about their mechanical properties. The design and manufacturing of oral appliances made with 3D printing technologies require knowledge of the mechanical properties of the biocompatible material used to achieve optimal performance for each application. This paper focuses on analysing the mechanical behaviour of a wide range of biocompatible materials using different additive manufacturing technologies. To this end, tensile and bending tests on different types of recent biocompatible materials used with 3D printers were conducted to evaluate the influence of the material, 3D printing technology, and printing orientation on the fragile/ductile behaviour of the manufactured devices. A test bench was used to perform tensile tests according to ASTM D638 and bending tests according to ISO 178. The specimens were manufactured with nine different materials and five manufacturing technologies. Furthermore, specimens were created with different printing technologies, biocompatible materials, and printing orientations. The maximum allowable stress, rupture stress, flexural modulus, and deformation in each of the tested specimens were recorded. Results suggest that specimens manufactured with Stereolithography (SLA) and milling (polymethyl methacrylate PMMA) achieved high maximum allowable and rupture stress values. It was also observed that Polyjet printing and Selective Laser Sintering technologies led to load–displacement curves with low maximum stress and high deformation values. Specimens manufactured with Digital Light Processing technology showed intermediate and homogeneous performance. Finally, it was observed that the printing direction significantly influences the mechanical properties of the manufactured specimens in some cases.

Redesign of an innovative new extrusion system for a printing machine for ceramics

2021 ◽  
Author(s):  
Jihad EL Mesbahi ◽  
Irene Buj Corral ◽  
Abdelilah EL Mesbahi
Keyword(s):  
3D Printing ◽  
Mechanical Design ◽  
Low Cost ◽  
Ceramic Materials ◽  
Physicochemical Characteristics ◽  
Performance Criteria ◽  
Free Form ◽  
Direct Ink Writing ◽  
3D Printers ◽  
Printing Machine

Abstract Today, the introduction of ceramic materials in the medical field is becoming a vital necessity because of its stable physicochemical characteristics, high biocompatibility, and good osteoconductivity. On the other hand, machining of ceramic components is difficult, owing to their extreme hardness and brittleness. Additive Manufacturing (AM) technologies are an appropriate alternative to obtain the complex shapes of implants, which can have porous structures. Thus, since the development of 3D printing, Direct Ink Writing (DIW) is one of the most promising and inexpensive techniques for shaping free-form ceramic medical components such as prostheses or dental implants from liquids or pastes. However, the assurance of performance criteria of the extrusion system for simultaneous usage becomes the major challenge for most Direct Ink Writing (DIW) platforms, for instance for printing large parts, for multi-material printing, to decrease printing time, and to increase efficiency in terms of motor usage and weight of the extruders. To address the current deficiencies, a new extrusion system is redesigned for a 3D printing machine for ceramics that is compatible with different low-cost, open-source 3D printers. The proposed extrusion model enables printing with a loader with different syringes simultaneously, without stopping the operational process while switching the syringe. Pugh concept analysis was used to select the optimum design shape. After that, the 3D CAD environment was used to combine the strength of Pugh’s method and the design space. This brings a new concept into the mechanical design field for 3D printers, which is in line with the technological trends prevalent in industry.

Application of Innovative Hydroxyapatite Materials in 3D Printing for Biocompatible Voice Implants

2018 ◽  
Vol 69 (4) ◽  
pp. 840-842
Author(s):  
Wojciech Musialik ◽  
Marcin Nabialek ◽  
Slawomir Letkiewicz ◽  
Andrei Victor Sandu ◽  
Katarzyna Bloch
Keyword(s):  
3D Printing ◽  
Surgical Procedures ◽  
Bacterial Infections ◽  
Fungal Infections ◽  
Colloidal Silver ◽  
Bone Implants ◽  
External Ring ◽  
Voice Prostheses ◽  
3D Printers ◽  
Silver Composite

The paper presents the possibility of using an innovative hydroxyapatite filament Ca10(PO4)6(OH)2 for printing in 3D printers of bone implants and the possibility of using it during implantation with voice prostheses. The introduction of an additional colloidal silver composite in voice implants will contribute to the reduction of bacterial infections, fungal infections and granulomatous hyperplasia. The creation of a stable external ring of the vocal fistula will remove complications associated with it with enlargement of the fistula and leakiness of voice implants. The ability to print with a hydroxyapatite filament will allow digital pre-surgery modeling of bone implants suited to the needs of surgical procedures.

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.

Analysis of silica based prosthetic human teeth using 3D printing machine for dental assistance

2020 ◽  
Author(s):  
T. Blesslin Sheeba ◽  
A. Albert Raj ◽  
D. Ravikumar ◽  
S. Sheeba Rani ◽  
P. Vijayakumar ◽  
...  
Keyword(s):  
3D Printing ◽  
Human Teeth ◽  
Printing Machine

scholarly journals Foundation Piles—A New Feature for Concrete 3D Printers

Materials ◽  
2021 ◽  
Vol 14 (10) ◽  
pp. 2545
Author(s):  
Marcin Hoffmann ◽  
Krzysztof Żarkiewicz ◽  
Adam Zieliński ◽  
Szymon Skibicki ◽  
Łukasz Marchewka
Keyword(s):  
3D Printing ◽  
Rapid Development ◽  
Construction Materials ◽  
Shallow Foundation ◽  
Soil Reinforcement ◽  
3D Printer ◽  
Permanent Formwork ◽  
3D Printers ◽  
New Feature ◽  
The Cost

Foundation piles that are made by concrete 3D printers constitute a new alternative way of founding buildings constructed using incremental technology. We are currently observing very rapid development of incremental technology for the construction industry. The systems that are used for 3D printing with the application of construction materials make it possible to form permanent formwork for strip foundations, construct load-bearing walls and partition walls, and prefabricate elements, such as stairs, lintels, and ceilings. 3D printing systems do not offer soil reinforcement by making piles. The paper presents the possibility of making concrete foundation piles in laboratory conditions using a concrete 3D printer. The paper shows the tools and procedure for pile pumping. An experiment for measuring pile bearing capacity is described and an example of a pile deployment model under a foundation is described. The results of the tests and analytical calculations have shown that the displacement piles demonstrate less settlement when compared to the analysed shallow foundation. The authors indicate that it is possible to replace the shallow foundation with a series of piles combined with a printed wall without locally widening it. This type of foundation can be used for the foundation of low-rise buildings, such as detached houses. Estimated calculations have shown that the possibility of making foundation piles by a 3D printer will reduce the cost of making foundations by shortening the time of execution of works and reducing the consumption of construction materials.

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