Swept Volume Representation of Material Deposition Processes for Tissue Scaffold Fabrication

2005 ◽  
Author(s):  
Jie Li ◽  
William Regli ◽  
Wei Sun
Keyword(s):  
Tissue Scaffold ◽  
Scaffold Fabrication ◽  
Material Deposition ◽  
Deposition Processes ◽  
Swept Volume

Development and Study of a Hybrid Tissue Scaffold Fabrication System for Neurotrophin Delivery

2013 ◽  
Author(s):  
V.P. Jani ◽  
R. Patel ◽  
R.K. Reddy ◽  
L.R. Zhang ◽  
C.T. Wagner ◽  
...  
Keyword(s):  
Tissue Scaffold ◽  
Scaffold Fabrication

Build strategies for rapid manufacturing of components of varying complexity

2015 ◽  
Vol 21 (3) ◽  
pp. 340-350 ◽  
Author(s):  
Suryakumar Simhambhatla ◽  
K.P. Karunakaran
Keyword(s):  
Manufacturing Process ◽  
Design Methodology ◽  
Layered Manufacturing ◽  
Rapid Manufacturing ◽  
Geometric Complexity ◽  
Content Type ◽  
Material Deposition ◽  
Fixed Axis ◽  
Deposition Processes ◽  
Deposition Direction

Purpose – This paper aims to develop build strategies for rapid manufacturing of components of varying complexity with the help of illustration. Design/methodology/approach – The build strategies are developed using a hybrid layered manufacturing (HLM) setup. HLM, an automatic layered manufacturing process for metallic objects, combines the best features of two well-known and economical processes, viz., arc weld-deposition and milling. Depending on the geometric complexity of the object, the deposition and/or finish machining may involve fixed (3-axis) or variable axis (5-axis) kinematics. Findings – Fixed axis (3-axis) kinematics is sufficient to produce components free of undercuts and overhanging features. Manufacture of components with undercuts can be categorized into three methods, viz., those that exploit the inherent overhanging ability, those that involve blinding of the undercuts in the material deposition stage and those that involve variable axis kinematics for aligning the overhang with the deposition direction. Research limitations/implications – Although developed using the HLM setup, these generic concepts can be used in a variety of metal deposition processes. Originality/value – This paper describes the methodology for realizing undercut features of varying complexity and also chalks out the procedure for their manufacture with the help of case studies for each approach.

Spiral-Like Path Planning Without Gap for Material Deposition Processes

2006 ◽  
Author(s):  
Kunnayut Eiamsa-ard ◽  
F. W. Liou ◽  
Lan Ren ◽  
H. Choset
Keyword(s):  
Path Planning ◽  
Cross Sections ◽  
Arbitrary Shape ◽  
Metal Deposition ◽  
Cnc Machining ◽  
Pocket Machining ◽  
Parallel Path ◽  
Material Deposition ◽  
New Strategy ◽  
Deposition Processes

Contour-parallel path, also called offset path, is a commonly used deposition strategy exploited by many deposition processes. This offset path has been studied vastly due to the potential of its applications. The majority of contour-parallel path research is found in robotics, CNC machining, and metal deposition. Even though curve offsetting has been extensively studied, there is virtually no algorithm that can produce a complete connected deposition path and can fill arbitrary shape cross sections entirely without gaps. This gap problem is similar to the uncut-region problem in CNC pocket machining. There are only few investigations on this uncut-region or gap problem even though the problem has long been recognized. A new strategy to divide regions and to plan the spiral-like deposition paths without gap based on contour-parallel paths is discussed in this paper. To prove the correctness and the usefulness of the proposed method, simulations and experiments are also discussed.

Characteristics of Thick Film Deposition in Powder Jet Machining

2013 ◽  
Vol 7 (6) ◽  
pp. 630-637
Author(s):  
Chihiro Nishikawa ◽  
◽  
Naohide Mizukuchi ◽  
Akihiko Tomie ◽  
Keita Shimada ◽  
...  
Keyword(s):  
Deposition Process ◽  
Film Deposition ◽  
Abrasive Jet Machining ◽  
Material Deposition ◽  
Transmission Electron ◽  
Particle Hydrodynamics ◽  
Smoothed Particle ◽  
Impact Phenomena ◽  
Deposition Processes ◽  
The Impact

Powder jet machining can be used for both material removal (abrasive jet machining) and material deposition processes (powder jet deposition) by changing the powder spray conditions. The transition from the removal to the deposition is investigated. The transition between these two phenomena, removal and deposition, is studied through simulating the impact phenomena of two alumina particles with a glass substrate using the Smoothed Particle Hydrodynamics (SPH) method in this study. Crystalline structures of an alumina film created were observed with a Transmission Electron Microscope (TEM). Observation indicates that a thick multicrystalline film is created when the blasted particles are monocrystalline alumina. It is also concluded that fractures within the particle material are necessary for the deposition process, and that fragments less than 100 nm in size contribute to the deposition of the thick films.

Optical trapping for tissue scaffold fabrication

2013 ◽  
Author(s):  
Anna Linnenberger ◽  
Callie Fiedler ◽  
Justine J. Roberts ◽  
Stacey C. Skaalure ◽  
Stephanie J. Bryant ◽  
...  
Keyword(s):  
Optical Trapping ◽  
Tissue Scaffold ◽  
Scaffold Fabrication

Study of Overlapping Adjacent Jets for Effective Laser-Induced Forward Transfer Printing

2020 ◽  
Vol 143 (4) ◽  
Author(s):  
Marc Sole-Gras ◽  
Ruitong Xiong ◽  
Changxiao Liang ◽  
William Roorda ◽  
Hitomi Yamaguchi ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Time Interval ◽  
Material System ◽  
Laser Printing ◽  
Optical Scanner ◽  
Material Deposition ◽  
Forward Transfer ◽  
Laser Frequencies ◽  
Deposition Processes ◽  
Viscous Solutions

Abstract Laser-induced forward transfer (LIFT) is a well-established, versatile additive manufacturing technology for orifice-free printing of highly viscous solutions and suspensions. In order to improve the efficiency of point-wise LIFT printing, an optical scanner is integrated into the laser printing system to enable the formation of overlapping adjacent jets used for deposition. The objective of this study is to evaluate the ejection behavior and deposition performance under such conditions during LIFT printing for further improvement. The effects of the overlap of adjacent jets are investigated in terms of jet formation and material deposition processes, capturing the jet tilting phenomenon caused by the perturbance induced by previously formed jet(s). The feasibility of optical scanner-assisted LIFT printing of viscous metal-based ink suspension has been successfully demonstrated during conductive line printing with induced overlapping jets. Investigation of various overlap ratios of adjacent jets found that a 30% jet overlap and a 133 µs time interval between laser pulses are optimal, in terms of deposition quality and ejection stability, even when a tilted jet ejection is present for the laser and material system in this study. Furthermore, multilayer polygonal and interdigitated structures are successfully deposited under these identified printing conditions. With the inclusion of an optical scanner, LIFT printing efficiency for viscous inks can be improved as the usage of higher laser frequencies is enabled, providing a faster orifice-free laser printing methodology.

Rapid freeze prototyping technique in bio‐plotters for tissue scaffold fabrication

2008 ◽  
Vol 14 (4) ◽  
pp. 246-253 ◽  
Author(s):  
Cong Bang Pham ◽  
Kah Fai Leong ◽  
Tze Chiun Lim ◽  
Kerm Sin Chian
Keyword(s):  
Tissue Scaffold ◽  
Scaffold Fabrication ◽  
Rapid Freeze Prototyping
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