scholarly journals A New Approach to Micromachining: High-Precision and Innovative Additive Manufacturing Solutions Based on Photopolymerization Technology

Materials ◽  
2020 ◽  
Vol 13 (13) ◽  
pp. 2951 ◽  
Author(s):  
Paweł Fiedor ◽  
Joanna Ortyl
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Liquid Crystal Display ◽  
Three Dimensional ◽  
Digital Light Processing ◽  
3D Objects ◽  
Conscious Choice ◽  
Optical Applications ◽  
Manufacturing Technologies ◽  
Printing Processes

The following article introduces technologies that build three dimensional (3D) objects by adding layer-upon-layer of material, also called additive manufacturing technologies. Furthermore, most important features supporting the conscious choice of 3D printing methods for applications in micro and nanomanufacturing are covered. The micromanufacturing method covers photopolymerization-based methods such as stereolithography (SLA), digital light processing (DLP), the liquid crystal display–DLP coupled method, two-photon polymerization (TPP), and inkjet-based methods. Functional photocurable materials, with magnetic, conductive, or specific optical applications in the 3D printing processes are also reviewed.

scholarly journals Three dimensional (3D) printing

2020 ◽  
Author(s):  
Paweł Fiedor ◽  
Joanna Ortyl
Keyword(s):  
3D Printing ◽  
Liquid Crystal Display ◽  
Three Dimensional ◽  
Digital Light Processing ◽  
3 Dimensional ◽  
3D Objects ◽  
Conscious Choice ◽  
Optical Applications ◽  
Manufacturing Technologies ◽  
Printing Processes

The following article introduces technologies that build 3 dimensional (3D) objects by adding layer-upon-layer of material, called also additive manufacturing technologies.  Furthermore most important features supporting the conscious choice of 3D printing methods for applications in micro and nanomanufacturing were covered. The micromanufacturing method covers photopolymerisation based methods such as Stereolithography (SLA), Digital Light Processing (DLP), Liquid Crystal Display – DLP coupled method, Two-Photon Polymerisation (TPP) and Inkjet based methods. Functional photocurable materials, with magnetic, conductive or specific optical applications in the 3D printing processes were also reviewed. 

scholarly journals Digital light processing 3D printing of modified liquid isoprene rubber using thiol-click chemistry

RSC Advances ◽  
2020 ◽  
Vol 10 (40) ◽  
pp. 23607-23614
Author(s):  
Lara Strohmeier ◽  
Heike Frommwald ◽  
Sandra Schlögl
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Click Chemistry ◽  
Good Resolution ◽  
Digital Light Processing ◽  
3D Objects ◽  
Liquid Rubber ◽  
Reactive Liquid ◽  
Isoprene Rubber

Elastomer-based 3D objects with good resolution are fabricated by additive manufacturing of photo-reactive liquid rubber formulations with digital light processing.

A Parallel Multiple Layer Cryolithography Device for the Manufacture of Biological Material for Tissue Engineering

2019 ◽  
Vol 13 (3) ◽  
Author(s):  
Gideon Ukpai ◽  
Joseph Sahyoun ◽  
Robert Stuart ◽  
Sky Wang ◽  
Zichen Xiao ◽  
...  
Keyword(s):  
Tissue Engineering ◽  
Additive Manufacturing ◽  
3D Printing ◽  
3D Structure ◽  
Three Dimensional ◽  
3D Object ◽  
New Device ◽  
Biological Matter ◽  
Simple Product ◽  
Printing Processes

While three-dimensional (3D) printing of biological matter is of increasing interest, current linear 3D printing processes lack the efficiency at scale required to mass manufacture products made of biological matter. This paper introduces a device for a newly developed parallel additive manufacturing technology for production of 3D objects, which addresses the need for faster, industrial scale additive manufacturing methods. The technology uses multilayer cryolithography (MLCL) to make biological products faster and in larger quantities by simultaneously printing two-dimensional (2D) layers in parallel and assembling the layers into a 3D structure at an assembly site, instead of sequentially and linearly assembling a 3D object from individual elements as in conventional 3D printing. The technique uses freezing to bind the 2D layers together into a 3D object. This paper describes the basic principles of MLCL and demonstrates the technology with a new device used to manufacture a very simple product that could be used for tissue engineering, as an example. An evaluation of the interlayer bonding shows that a continuous and coherent structure can be made from the assembly of distinct layers using MLCL.

Manufacturability Feedback and Model Correction for Additive Manufacturing

2014 ◽  
Author(s):  
Saigopal Nelaturi ◽  
Walter Kim ◽  
Arvind Rangarajan ◽  
Tolga Kurtoglu
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Medial Axis ◽  
Three Dimensional ◽  
Medial Axis Transform ◽  
Specific Design ◽  
Model Correction ◽  
Geometric Deviations ◽  
Physical Limitations ◽  
Printing Processes

Additive manufacturing, or 3d printing, is the process of building three dimensional solid shapes by accumulating material laid out in sectional layers. Additive manufacturing has been recognized for enabling production of complex custom parts that are difficult to manufacture otherwise. However, the dependence on build orientation and physical limitations of printing processes invariably lead to geometric deviations between manufactured and designed shapes that are usually evaluated after manufacture. In this paper, we formalize the measurement of such deviations in terms of a printability map that simulates the printing process and partitions each printed layer into disjoint regions with distinct local measures of size. We show that manufacturing capabilities such as printing resolution, and material specific design recommendations such as minimal feature sizes may be coupled in the printability map to evaluate expected deviations before manufacture. Furthermore, we demonstrate how partitions with size measures below required resolutions may be modified using properties of the medial axis transform, and use the corrected printability map to construct a representation of the manufactured model. We conclude by discussing several applications of the printability map for additive manufacturing.

scholarly journals Design and Development of Plastic Filament Extruder for 3D Printing

2018 ◽  
Vol 10 (3) ◽  
pp. 23 ◽  
Author(s):  
Mamta H. Wankhade ◽  
Satish G. Bahaley
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Three Dimensional ◽  
3D Printer ◽  
3D Objects ◽  
Fused Deposition ◽  
Additive Manufacturing Technology ◽  
Mechanized Method ◽  
Dimensional Object ◽  
The Cost

<p>3D printing is a form of additive manufacturing technology where a three dimensional object is created by laying down successive layers of material. It is mechanized method whereby 3D objects are quickly made on a reasonably sized machine connected to a computer containing blueprints for the object. As 3D printing is growing fast and giving a boost to product development, the factories doing 3D printing need to continuously meet the printing requirements and maintain an adequate amount of inventory of the filament. As the manufactures have to buy these filaments from various vendors, the cost of 3D printing increases. To overcome the problem faced by the manufacturers, small workshop owners, the need of 3D filament making machine arises. This project focuses on designing and fabricating a portable fused deposition 3D printer filament making machine with cheap and easily available components to draw 1.75 mm diameter ABS filament.</p>

scholarly journals State-of-the-Art Review on Additive Manufacturing Technology in Railway Infrastructure Systems

2021 ◽  
Vol 6 (1) ◽  
pp. 7
Author(s):  
Hao Fu ◽  
Sakdirat Kaewunruen
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Nuclear Power ◽  
State Of The Art ◽  
Three Dimensional ◽  
Railway Track ◽  
Component Design ◽  
Exploratory Stage ◽  
Art Research ◽  
Manufacturing Technologies

Additive manufacturing technologies, well known as three-dimensional printing (3DP) technologies, have been applied in many industrial fields, including aerospace, automobiles, shipbuilding, civil engineering and nuclear power. However, despite the high material utilization and the ability to rapidly construct complex shaped structures of 3D printing technologies, the application of additive manufacturing technologies in railway track infrastructure is still at the exploratory stage. This paper reviews the state-of-the-art research of additive manufacturing technologies related the railway track infrastructure and discusses the challenges and prospects of 3D printing technology in this area. The insights will not only help the development of 3D printing technologies into railway engineering but also enable smarter railway track component design and improve track performance and inspection strategies.

scholarly journals 3D printing processes for photocurable polymeric materials: technologies, materials, and future trends

2018 ◽  
Vol 16 (3) ◽  
pp. 151-160 ◽  
Author(s):  
Gabriele Taormina ◽  
Corrado Sciancalepore ◽  
Massimo Messori ◽  
Federica Bondioli
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Process Parameters ◽  
Polymeric Materials ◽  
Future Trends ◽  
Digital Light Processing ◽  
General Overview ◽  
Base Matrix ◽  
Main Factors ◽  
Printing Processes

The aim of this review is a faithful report of the panorama of solutions adopted to fabricate a component using vat photopolymerization (VP) processes. A general overview on additive manufacturing and on the different technologies available for polymers is given. A comparison between stereolithography and digital light processing is also presented, with attention to different aspects and to the advantages and limitations of both technologies. Afterward, a quick overview of the process parameters is given, with an emphasis on the necessities and the issues associated with the VP process. The materials are then explored, starting from base matrix materials to composites and nanocomposites, with attention to examples of applications and explanations of the main factors involved.

scholarly journals Conventional Construction and 3D Printing: A Comparison Study on Material Cost in Jordan

2020 ◽  
Vol 2020 ◽  
pp. 1-14 ◽  
Author(s):  
Rawan Allouzi ◽  
Wael Al-Azhari ◽  
Rabab Allouzi
Keyword(s):  
3D Printing ◽  
Three Dimensional ◽  
Environmental Parameters ◽  
Structural Features ◽  
Precise Description ◽  
3D Objects ◽  
3D Printed ◽  
Computer Controlled ◽  
Printing Processes ◽  
The Impact

Three-dimensional (3D) printing is a procedure used to create 3D objects in which consecutive layers of a material are computer-controlled produced. Such objects can be constructed in any shape using digital model data. First, this paper presents a state-of-the-art review of the advances in 3D printing processes of construction. Then, the architectural, economical, environmental, and structural features of 3D printing are introduced. Examples of 3D printed structures are presented, and the construction challenges facing Jordan, that encouraged this study, are stated. Finally, a precise description regarding the impact of 3D printing is provided by comparing conventional construction data of Ras Alain Multipurpose Hall in Jordan and the expected data if the same building has been built using 3D printing. The suggested model is generated using Revit software. As a result of this study, an understanding of 3D printing procedure, mechanism of action, and its impact on the future of construction and architecture through economical, structural, and environmental parameters is achieved. This leads to encourage engineers and contractors to take this subject into account for construction in Jordan.

Manufacturability Feedback and Model Correction for Additive Manufacturing

2015 ◽  
Vol 137 (2) ◽  
Author(s):  
Saigopal Nelaturi ◽  
Walter Kim ◽  
Tolga Kurtoglu
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Medial Axis ◽  
Three Dimensional ◽  
Medial Axis Transform ◽  
Specific Design ◽  
Model Correction ◽  
Geometric Deviations ◽  
Physical Limitations ◽  
Printing Processes

Additive manufacturing, or 3D printing, is the process of building three-dimensional solid shapes by accumulating material laid out in sectional layers. Additive manufacturing has been recognized for enabling production of complex custom parts that are difficult to manufacture otherwise. However, the dependence on build orientation and physical limitations of printing processes invariably lead to geometric deviations between manufactured and designed shapes that are usually evaluated after manufacture. In this paper, we formalize the measurement of such deviations in terms of a printability map that simulates the printing process and partitions each printed layer into disjoint regions with distinct local measures of size. We show that manufacturing capabilities, such as printing resolution, and material specific design recommendations, such as minimal feature sizes, may be coupled in the printability map to evaluate expected deviations before manufacture. Furthermore, we demonstrate how partitions with size measures below required resolutions may be modified using properties of the medial axis transform and use the corrected printability map to construct a representation of the manufactured model. We conclude by discussing several applications of the printability map for additive manufacturing.

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.

Sign in / Sign up

Export Citation Format

Share Document