scholarly journals Additive Manufacturing of Transparent Glass Structures

2018 ◽  
Vol 5 (4) ◽  
pp. 269-283 ◽  
Author(s):  
Chikara Inamura ◽  
Michael Stern ◽  
Daniel Lizardo ◽  
Peter Houk ◽  
Neri Oxman
Keyword(s):  
Additive Manufacturing ◽  
Transparent Glass

scholarly journals Additive Manufacturing of Optically Transparent Glass

2015 ◽  
Vol 2 (3) ◽  
pp. 92-105 ◽  
Author(s):  
John Klein ◽  
Michael Stern ◽  
Giorgia Franchin ◽  
Markus Kayser ◽  
Chikara Inamura ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Transparent Glass ◽  
Optically Transparent

Additive Manufacturing of Transparent Soda-Lime Glass Using a Filament-Fed Process

2017 ◽  
Vol 139 (6) ◽  
Author(s):  
Junjie Luo ◽  
Luke J. Gilbert ◽  
Chuang Qu ◽  
Robert G. Landers ◽  
Douglas A. Bristow ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Process Parameters ◽  
Bubble Formation ◽  
Soda Lime ◽  
Soda Lime Glass ◽  
Correct Process ◽  
Transparent Glass ◽  
Optically Transparent ◽  
Transparent Parts

There are many scientific and engineering applications of transparent glass including optics, communications, electronics, and hermetic seals. However, there has been minimal research toward the additive manufacturing (AM) of transparent glass parts. This paper describes and demonstrates a filament-fed technique for AM of transparent glass. A transparent glass filament is melted by a CO2 laser and solidifies as the workpiece is translated relative to the stationary laser beam. To prevent thermal shock, the workpiece rests on a heated build platform. In order to obtain optically transparent parts, several challenges must be overcome, notably producing index homogeneity and avoiding bubble formation. The effects of key process parameters on the morphology and transparency of the printed glass are explored experimentally. These results are compared to a low-order model relating the process parameters to the temperature of the molten region, which is critical to the quality of the deposited glass. At lower temperatures, the glass is not fully melted, resulting in index variations in the final part, while at higher temperatures, phase separation introduces bubbles and other defects into the part. The correct process avoids these issues and deposits optically transparent glass.

scholarly journals The molten glass sewing machine

2017 ◽  
Vol 375 (2093) ◽  
pp. 20160156 ◽  
Author(s):  
P.-T. Brun ◽  
Chikara Inamura ◽  
Daniel Lizardo ◽  
Giorgia Franchin ◽  
Michael Stern ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Molten Glass ◽  
Building Blocks ◽  
Geometrical Model ◽  
Media Theory ◽  
Complex Media ◽  
Sewing Machine ◽  
Transparent Glass ◽  
Fluid Instability ◽  
Optically Transparent

We present a fluid-instability-based approach for digitally fabricating geometrically complex uniformly sized structures in molten glass. Formed by mathematically defined and physically characterized instability patterns, such structures are produced via the additive manufacturing of optically transparent glass, and result from the coiling of an extruded glass thread. We propose a minimal geometrical model—and a methodology—to reliably control the morphology of patterns, so that these building blocks can be assembled into larger structures with tailored functionally and optically tunable properties. This article is part of the themed issue ‘Patterning through instabilities in complex media: theory and applications’.

Wire-Fed Additive Manufacturing of Transparent Glass Parts

2015 ◽  
Author(s):  
Junjie Luo ◽  
Luke Gilbert ◽  
Chuang Qu ◽  
Jacob Wilson ◽  
Douglas Bristow ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Process Parameters ◽  
Work Piece ◽  
Powder Bed ◽  
Transparent Glass ◽  
Melt Pool ◽  
Final Sample ◽  
Scan Speed ◽  
Transparent Parts ◽  
A New Technique

This paper presents a new technique for additive manufacturing of transparent glass. In this process, transparent glass is wire-fed into a laser generated melt pool, which solidifies as the work piece is moved relative to a stationary laser beam. The key parameters are identified in terms of their effects on the morphology and transparency of printed walls. The relationship between these parameters is studied experimentally. It is demonstrated that the process parameters strongly affect the morphology and proper selection of the scan speed, feed rate and laser power can produce optimum results. A key advantage of this process relative to powder bed techniques is the ability to form optically transparent parts. The process parameters also determine the transmissivity of the final sample. The transmissivity is measured experimentally for builds with different process parameters.

scholarly journals Present state of 3D printing from glass

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Vlastimil Hotař ◽  
Marie Stará ◽  
Veronika Máková ◽  
Barbora Nikendey Holubová
Keyword(s):  
Additive Manufacturing ◽  
3D Printing ◽  
Additive Technologies ◽  
Transparent Glass ◽  
Current State ◽  
Plastic Metal ◽  
Valuable Method ◽  
Specific Shape ◽  
High Degree ◽  
And Robotics

Abstract This paper deals with the issue of additive technologies using glass. At the beginning, our research dealt with a review of the current state and specification of potentially interesting methods and solutions. At present, this technology is being actively developed and studied in glass research. However, as the project started at the Department of Glass Producing Machines and Robotics, the following text will be more focused on the existing 3D printing machinery and basic technological approaches. Although “additive manufacturing” in the sense of adding materials has been used in glass manufacturing since the beginning of the production of glass by humans, the term additive manufacturing nowadays refers to 3D printing. Currently, there are several approaches to 3D printing of glass that have various outstanding advantages, but also several serious limitations. The resulting products very often have a high degree of shrinkage and rounding (after sintering), and specific shape structures (after the application in layers), but they generally have a large number of defects (especially bubbles or crystallization issues). Some technologies do not lead to the production of transparent glass and, therefore, its optical properties are significantly restricted. So far, the additive manufacturing of glass do not produce goods that are price competitive to goods produced by conventional glass-making technologies. If 3D glass printing is to be successful as an industrial and/or highly aesthetically valuable method, then it must bring new and otherwise unachievable features and properties, as with 3D printing of plastic, metal, or ceramics. Nowadays, these technologies promise to be such a tool and are beginning to attract more and more interest.

Regeneration von Knochendefekten mit computergesteuerter Herstellung von Gerüstträgern

2013 ◽  
Vol 22 (03) ◽  
pp. 180-187 ◽  
Author(s):  
J. Henke ◽  
J. T. Schantz ◽  
D. W. Hutmacher
Keyword(s):  
Tissue Engineering ◽  
Additive Manufacturing ◽  
Custom Made

ZusammenfassungDie Behandlung ausgedehnter Knochen-defekte nach Traumata oder durch Tumoren stellt nach wie vor eine signifikante Heraus-forderung im klinischen Alltag dar. Aufgrund der bestehenden Limitationen aktueller Therapiestandards haben Knochen-Tissue-Engineering (TE)-Verfahren zunehmend an Bedeutung gewonnen. Die Entwicklung von Additive-Manufacturing (AM)-Verfahren hat dabei eine grundlegende Innovation ausgelöst: Durch AM lassen sich dreidimensionale Gerüstträger in einem computergestützten Schichtfür-Schicht-Verfahren aus digitalen 3D-Vorlagen erstellen. Wurden mittels AM zunächst nur Modelle zur haptischen Darstellung knöcherner Pathologika und zur Planung von Operationen hergestellt, so ist es mit der Entwicklung nun möglich, detaillierte Scaffoldstrukturen zur Tissue-Engineering-Anwendung im Knochen zu fabrizieren. Die umfassende Kontrolle der internen Scaffoldstruktur und der äußeren Scaffoldmaße erlaubt eine Custom-made-Anwendung mit auf den individuellen Knochendefekt und die entsprechenden (mechanischen etc.) Anforderungen abgestimmten Konstrukten. Ein zukünftiges Feld ist das automatisierte ultrastrukturelle Design von TE-Konstrukten aus Scaffold-Biomaterialien in Kombination mit lebenden Zellen und biologisch aktiven Wachstumsfaktoren zur Nachbildung natürlicher (knöcherner) Organstrukturen.

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