scholarly journals Stereo-photometric techniques for scanning micrometer scale

2015 ◽  
Vol 6 (13) ◽  
pp. 72 ◽  
Author(s):  
Rocio Cachero ◽  
Carlota Abello
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Great Accuracy ◽  
Manufacturing Methods ◽  
Micrometer Scale

This paper describes a new methodology based on the combination of photogrammetric and stereo-photometric techniques that allows creating virtual replicas reproducing the relief in micrometric scale, with a geometric resolution until 7 microns. The finest details of the texture obtained by photogrammetric methods are translated to the relief of the mesh to provide quality 3D printing by additive manufacturing methods. These results open new possibilities for virtual and physical reproduction of archeological items that need a great accuracy and geometric resolution.

scholarly journals Rapid fabrication of MOF-based mixed matrix membranes through digital light processing

2021 ◽  
Author(s):  
Alexey Pustovarenko ◽  
Beatriz Seoane ◽  
Edy Abou-Hamad ◽  
Helen E King ◽  
Bert Weckhuysen ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Processing Speed ◽  
Mixed Matrix Membranes ◽  
Scientific Interest ◽  
Mixed Matrix ◽  
Digital Light Processing ◽  
Additive Manufacturing Technology ◽  
Rapid Fabrication ◽  
Manufacturing Methods

3D printing, also known as additive manufacturing technology, has greatly expanded across multiple sectors of technology replacing classical manufacturing methods by combining processing speed and high precision. The scientific interest...

Rapid Investment Casting: Design and Manufacturing Technologies

2019 ◽  
Author(s):  
Christopher T. Richard ◽  
Tsz-Ho Kwok
Keyword(s):  
Additive Manufacturing ◽  
Fatigue Strength ◽  
3D Printing ◽  
Surface Finish ◽  
Investment Casting ◽  
Biomedical Engineering ◽  
Design And Manufacturing ◽  
Manufacturing Methods ◽  
Manufacturing Technologies ◽  
Casting Design

Abstract With the emergence of new metal AM (additive manufacturing) methods, rapid IC (investment casting), a variation of conventional investment casting has been a popular topic of research in the fields of: aerospace, dentistry and biomedical engineering. RIC (Rapid investment casting) takes advantage of the additive nature of 3D printing for pattern making which allows for more complex castings than traditional investment casting. RIC is a manufacturing process that combines the casting knowledge accumulated over five thousand years with relatively novel AM knowledge. The result is a process that can compete with newer metal AM methods with the added benefits of excellent surface finish, fatigue strength and the ability to create parts from almost any metal or metal alloy. This article will focus on research advancements in investment casting, AM and all the topics that are closely related to optimizing these two processes. Beyond that, aerospace, dentistry and biomedical engineering advancements using investment casting will be reviewed.

Utilizing 3D Printing Pens for Maintenance and Repair of Additively Manufactured Components

2021 ◽  
Author(s):  
Kyle Koren ◽  
Toluwalase Olajoyegbe ◽  
Beshoy Morkos ◽  
Hector Gutierrez
Keyword(s):  
Tensile Strength ◽  
Additive Manufacturing ◽  
3D Printing ◽  
Tensile Tests ◽  
Maintenance And Repair ◽  
Study Results ◽  
Economic Trends ◽  
Manufacturing Methods ◽  
Service Components ◽  
Underlying Mechanisms

Abstract The adoption of additive manufacturing methods is becoming prevalent in industry. Socio-economic trends seek more customization and sustainability in production. An increase in unique service components will warrant the need for more flexible repair methods. This is particularly important for components that are difficult to access or disassemble — thus requiring an on-site repair. This paper introduces the use of 3D printing pens as a means to perform repair to additively manufacturing components. A study was conducted to assess the feasibility of using a 3D printing pen in maintenance, repair and overhaul (MRO) applications on polymer-based service products. A series of tensile tests were conducted on printed specimens, pre- and post-repair, to examine the tensile retention of the mended region. Results indicate significant retention in tensile strength in the mended specimens, supporting the notion of the pens relevance in repair and overhaul applications. Specimens that fractured within the repair region were seen to have retained (81 ± 10) % of their original tensile strength while specimens that fractured outside the region retained (86 ± 4) %. Considering the limited control of the study, results acquired encourage further analysis of the underlying mechanisms in the process, with the intent to more efficiently exploit this approach for practical structure-based repair applications.

scholarly journals Additive Manufacturing in the Development of Scalable Models of Technological Equipment

2021 ◽  
Vol 346 ◽  
pp. 01040
Author(s):  
Ildar Sabanaev ◽  
Alexey Dinmuhametov
Keyword(s):  
Mass Transfer ◽  
Additive Manufacturing ◽  
3D Printing ◽  
Heat And Mass Transfer ◽  
Research Work ◽  
Great Accuracy ◽  
Technological Equipment ◽  
Industrial Chemistry ◽  
Scale Models ◽  
Petrochemical Industries

The article presents the results of a study of effective methods for the development of full-scale models of technological equipment for chemical and petrochemical industries based on the use of additive manufacturing. It is shown that 3D printing can be used to prepare and test various elements of heat and mass transfer devices with great accuracy and in the shortest possible time. It is concluded that the use of additive manufacturing allows for significant efficiency of research work in the field of industrial chemistry and petrochemistry.

scholarly journals Efficient 3D printing via photooxidation of ketocoumarin based photopolymerization

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Xiaoyu Zhao ◽  
Ye Zhao ◽  
Ming-De Li ◽  
Zhong’an Li ◽  
Haiyan Peng ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Visible Light ◽  
Light Exposure ◽  
Three Dimensional ◽  
3D Printer ◽  
Light Penetration ◽  
Viable Solution

AbstractPhotopolymerization-based three-dimensional (3D) printing can enable customized manufacturing that is difficult to achieve through other traditional means. Nevertheless, it remains challenging to achieve efficient 3D printing due to the compromise between print speed and resolution. Herein, we report an efficient 3D printing approach based on the photooxidation of ketocoumarin that functions as the photosensitizer during photopolymerization, which can simultaneously deliver high print speed (5.1 cm h−1) and high print resolution (23 μm) on a common 3D printer. Mechanistically, the initiating radical and deethylated ketocoumarin are both generated upon visible light exposure, with the former giving rise to rapid photopolymerization and high print speed while the latter ensuring high print resolution by confining the light penetration. By comparison, the printed feature is hard to identify when the ketocoumarin encounters photoreduction due to the increased lateral photopolymerization. The proposed approach here provides a viable solution towards efficient additive manufacturing by controlling the photoreaction of photosensitizers during photopolymerization.

Fused Filament Fabrication 3D Printed Polylactic Acid Electroosmotic Pumps

Lab on a Chip ◽  
2021 ◽  
Author(s):  
Liang Wu ◽  
Stephen Beirne ◽  
Joan-Marc Cabot Canyelles ◽  
Brett Paull ◽  
Gordon G. Wallace ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Polylactic Acid ◽  
Fused Filament Fabrication ◽  
Flexible Approach ◽  
Electroosmotic Pump ◽  
3D Printed ◽  
Electroosmotic Pumps

Additive manufacturing (3D printing) offers a flexible approach for the production of bespoke microfluidic structures such as the electroosmotic pump. Here a readily accessible fused filament fabrication (FFF) 3D printing...

3D Printing of Biphasic Inks: Beyond Single-Scale Architectural Control

2021 ◽  
Author(s):  
Gianluca Cidonio ◽  
Marco Costantini ◽  
Filippo Pierini ◽  
Chiara Scognamiglio ◽  
Tarun Agarwal ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Disruptive Technology ◽  
Main Research ◽  
Single Scale

To date, Additive Manufacturing (AM) has come to the fore as a major disruptive technology embodying two main research lines - developing increasingly sophisticated printing technologies and new processable materials....

scholarly journals 3D Printing for Soft Tissue Regeneration and Applications in Medicine

Biomedicines ◽  
2021 ◽  
Vol 9 (4) ◽  
pp. 336
Author(s):  
Sven Pantermehl ◽  
Steffen Emmert ◽  
Aenne Foth ◽  
Niels Grabow ◽  
Said Alkildani ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Additive Manufacturing ◽  
Soft Tissue ◽  
3D Printing ◽  
Tissue Regeneration ◽  
Research Area ◽  
Modern Medicine ◽  
Soft Tissue Regeneration ◽  
General Overview

The use of additive manufacturing (AM) technologies is a relatively young research area in modern medicine. This technology offers a fast and effective way of producing implants, tissues, or entire organs individually adapted to the needs of a patient. Today, a large number of different 3D printing technologies with individual application areas are available. This review is intended to provide a general overview of these various printing technologies and their function for medical use. For this purpose, the design and functionality of the different applications are presented and their individual strengths and weaknesses are explained. Where possible, previous studies using the respective technologies in the field of tissue engineering are briefly summarized.

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