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Binder Jetting

Wei-Yi Xia, Yan-Jun Du, Fa-Sheng Li, Chun-Ping Li, Xiu-Lan Yan, Arul Arulrajah, Fei Wang, De-Jun Song
In this study, in-situ treatment using dry jet mixing construction method and SPC (single superphosphate and calcium oxide) new binder are used to solidify/stabilize a heavy metal contaminated site soil with relatively high content of organic matters. Time-dependent field performance of the soils at 41 and 326 days after treatment is evaluated, which includes electrical conductivity (EC), leachability of heavy metals and chemical oxygen demand (COD), soil penetration resistance, acid neutralization capacity (ANC), and chemical speciation of heavy metals...
February 11, 2019: Journal of Hazardous Materials
Pan Tian, Fan Yang, Li-Ping Yu, Min-Mei Lin, Wei Lin, Qi-Feng Lin, Zhu-Fen Lv, Si-Yu Huang, Yan-Zhong Chen
The aim of this study was to determine the effect of varying excipient content on the formation and physical properties of 3D printed tablets. Fifteen different excipient preparations were formed into tablets with radii of 5 mm and thickness of 2 mm, using binder jetting (BJ). The tablets were analyzed by assessing visual and microstructural appearance, friability, hardness, and disintegration time. We found that filling agents with high water solubility (e.g., D-sucrose), binding agents with a high viscosity in solution (e...
February 11, 2019: Drug Development and Industrial Pharmacy
René Lezama-Nicolás, Marisela Rodríguez-Salvador, Rosa Río-Belver, Iñaki Bildosola
While novel technologies have tremendous competitive potential, they also involve certain risks. Maturity assessment analyzes how well a technological development can fulfill an expected task. The technology readiness level (TRL) has been considered to be one of the most promising approaches for addressing technological maturity. Nonetheless, its assessment requires opinions of the experts, which is costly and implies the risk of personal bias. To fill this gap, this paper presents a Bibliometric Method for Assessing Technological Maturity (BIMATEM)...
2018: Scientometrics
Antti J K Väisänen, Marko Hyttinen, Sampsa Ylönen, Lauri Alonen
The aim of this study was to measure the concentrations of gaseous and particulate contaminants originated from additive manufacturing operations and post-processes in an occupational setting when plastics were used as feedstock materials. Secondary aims were to evaluate the concentration levels based on proposed exposure limits and target values and to propose means to reduce exposure to contaminants released in additive manufacturing processes. Volatile organic compounds were sampled with Tenax® TA adsorption tubes and analyzed with thermo desorption gas chromatography-mass spectrometry instrument...
December 12, 2018: Journal of Occupational and Environmental Hygiene
Sophia Infanger, Alexander Haemmerli, Simona Iliev, Andrea Baier, Edmont Stoyanov, Julian Quodbach
3D-printing is a promising tool to pave the way to the widespread adaption of individualized medicine. Several printing techniques have been investigated and introduced to pharmaceutical research. Until now, only one 3D-printed medicine is approved on the US market. The medicine is manufactured via drop-on-powder deposition, which uses inkjet printing to jet a liquid binder on a powder bed to create 3D objects. However, inkjet processes are prone to nozzle clogging when binders or active pharmaceutical ingredients (APIs) are included in the printing ink...
November 17, 2018: International Journal of Pharmaceutics
Kapilkumar Vithani, Alvaro Goyanes, Vincent Jannin, Abdul W Basit, Simon Gaisford, Ben J Boyd
PURPOSE: Three-dimensional printing (3DP) is a rapidly growing additive manufacturing process and it is predicted that the technology will transform the production of goods across numerous fields. In the pharmaceutical sector, 3DP has been used to develop complex dosage forms of different sizes and structures, dose variations, dose combinations and release characteristics, not possible to produce using traditional manufacturing methods. However, the technology has mainly been focused on polymer-based systems and currently, limited information is available about the potential opportunities for the 3DP of soft materials such as lipids...
November 7, 2018: Pharmaceutical Research
Michael C H Karg, Michael Rasch, Konstantin Schmidt, Sophia A E Spitzer, Till F Karsten, Daniel Schlaug, Cosmin-Rudolf Biaciu, Andrey I Gorunov, Michael Schmidt
Up to now, minimizing segregation of free-flowing, microscale metal powder mixtures driven by different mass density is an open challenge. In this work, effects of particle size variation on homogeneity of Al-Cu mixtures, with a density ratio of 3.3, are examined. Dry coating Al particles with 0.3 wt% fumed silica SiOx nanoparticles significantly decreases interparticle attraction. This enlarges the range of free-flowing Al particle sizes to < 20 µm. Powder mixture homogeneity is examined optically in vibrated bulk powder and thinly spread layers...
October 21, 2018: Nanomaterials
Dong-Hyun Kim, Jinwoo Lee, Jinju Bae, Sungbum Park, Jihwan Choi, Jeong Hun Lee, Eoksoo Kim
3D printing technology has recently been highlighted as an innovative manufacturing process. Among various 3D printing methods, binder jetting (BJ) 3D printing is particularly known as technology used to produce the complex sand mold quickly for a casting process. However, high manufacturing costs, due to its expensive materials, need to be lowered for more industrial applications of 3D printing. In this study, we investigated mechanical properties of sand molds with a lightweight structure for low material consumption and short process time...
October 11, 2018: Materials
Evan Wheat, Mihaela Vlasea, James Hinebaugh, Craig Metcalfe
The adoption of metal binder jetting additive manufacturing (AM) for functional parts relies on a deep understanding between the materials, the design aspects, the additive manufacturing process and sintering. This work focuses on the relationship between sintering theory and process outcomes. The data included in this article provides additional supporting information on the authors' recent publication (Wheat et al., 2018 [1]) on the sinter structure analysis of commercially pure titanium parts manufactured using powder bed binder jetting additive manufacturing...
October 2018: Data in Brief
Di Peng, Zhe Zhong, Tao Cai, Songtao Guo, Xiaofeng Zhao, Yingzheng Liu
A novel pressure-sensitive paint has been developed by mixing phosphor Sr4 Al14 O25 :Eu,Dy with pressure-sensitive luminophore PtTFPP in a polyethylene binder. The phosphor particles served as hosts for PtTFPP molecules while providing excitation light via their bright blue/green luminescence. The unique long afterglow of Sr4 Al14 O25 :Eu,Dy allows the coating to be charged by a light source (UV-LED or even sunlight) in advance, and then the luminescent signals can be collected by using a color camera for pressure measurement (without an external light source)...
August 2018: Review of Scientific Instruments
Bruce L Tai, Yi-Tang Kao, Nolan Payne, Yihao Zheng, Lei Chen, Albert J Shih
Synthetic bones made of polyurethane (PU) foams or glass-fiber reinforced epoxy are often used in surgical training, planning, and tool analysis, but these materials cannot be 3D printed for a patient-specific design. This paper introduces a new type of bone-mimicking material made by the binder jetting technology and a post-strengthening process with epoxy, namely 3D polymer-infiltrated composite (3DPIC). 3DPIC has been previously evaluated by surgeons as a proper alternative to commercial synthetic bones, but no quantitative testing data is available...
November 2018: Medical Engineering & Physics
Sonia Holland, Chris Tuck, Tim Foster
Binder jetting is an additive manufacturing technique in which powdered material is sequentially laid down and printed on by an ink binder, in a selective manner, to form a 3D object. Unfortunately work in this area relevant to food materials is largely unpublished, however a typical application of this technique is sugar powder bound by a water and alcohol based ink with optional colour or flavour demonstrated by commercial ventures. In this work we demonstrate the use of a small scale powder layering device under an ink jet printer to test prototype powders prior to producing quantities typically used in commercially available binder jetting machines...
November 15, 2018: Carbohydrate Polymers
Luca Fiorenza, Robin Yong, Sarbin Ranjitkar, Toby Hughes, Michelle Quayle, Paul G McMenamin, John Kaidonis, Grant C Townsend, Justin W Adams
OBJECTIVES: Rapid prototyping (RP) technology is becoming more affordable, faster, and is now capable of building models with a high resolution and accuracy. Due to technological limitations, 3D printing in biological anthropology has been mostly limited to museum displays and forensic reconstructions. In this study, we compared the accuracy of different 3D printers to establish whether RP can be used effectively to reproduce anthropological dental collections, potentially replacing access to oftentimes fragile and irreplaceable original material...
August 20, 2018: American Journal of Physical Anthropology
Dorit Nötzel, Ralf Eickhoff, Thomas Hanemann
With respect to rapid prototyping of ceramic components, there are known only a few processes (stereo lithography, binder jetting). In this work, a new process chain is described in detail, showing that ceramics can be printed in a very cost-efficient way. We developed a ceramic⁻polymer composite as filament material that can be printed on a low-cost fused filament fabrication (FFF) desktop printer, even with very small nozzle sizes enabling very small geometric feature sizes. The thermal post-processing, with debinding and sintering, is very close to the ceramic injection molding (CIM) process chain...
August 17, 2018: Materials
Yun Bai, Christopher B Williams
Binder jetting AM has been used to fabricate metal parts by first jetting a binder into a powder bed, and then sintering the resulting green part wherein the binder is removed and the metal particles are fused. Sintered part properties can be enhanced when nanoparticles are suspended into a solvent-based organic binder, as the inkjetted nanoparticles can reduce sintering shrinkage and increase mechanical strength. In this work, the authors also used a nanoparticle suspension without organic adhesives as a means for binding metal powder bed particles together...
September 28, 2018: Nanotechnology
Ramin Javan, Amy L Ellenbogen, Nicholas Greek, Shawn Haji-Momenian
PURPOSE: To describe the methodology of constructing a three-dimensional (3D) printed model of the glenohumeral joint, to serve as an interventional phantom for fluoroscopy-guided shoulder arthrography training. MATERIALS AND METHODS: The osseous structures, intra-articular space and skin surface of the shoulder were digitally extracted as separate 3D meshes from a normal CT arthrogram of the shoulder, using commercially available software. The osseous structures were 3D-printed in gypsum, a fluoroscopically radiopaque mineral, using binder jet technology...
June 9, 2018: Skeletal Radiology
Farzad Liravi, Mihaela Vlasea
The data included in this article provides additional supporting information on our recent publication (Liravi et al., 2018 [1]) on a novel hybrid additive manufacturing (AM) method for fabrication of three-dimensional (3D) structures from silicone powder. A design of experiments (DoE) study has been carried out to optimize the geometrical fidelity of AM-made parts. This manuscript includes the details of a multi-level factorial DOE and the response optimization results. The variation in the temperature of powder-bed when exposed to heat is plotted as well...
June 2018: Data in Brief
Michael Layani, Xiaofeng Wang, Shlomo Magdassi
The field of 3D printing, also known as additive manufacturing (AM), is developing rapidly in both academic and industrial research environments. New materials and printing technologies, which enable rapid and multimaterial printing, have given rise to new applications and utilizations. However, the main bottleneck for achieving many more applications is the lack of materials with new physical properties. Here, some of the recent reports on novel materials in this field, such as ceramics, glass, shape-memory polymers, and electronics, are reviewed...
October 2018: Advanced Materials
Giovanny F Acosta-Vélez, Timothy Z Zhu, Chase S Linsley, Benjamin M Wu
Binder jetting and material extrusion are the two most common additive manufacturing techniques used to create pharmaceutical tablets. However, their versatility is limited since the powder component is present throughout the dosage forms fabricated by binder jet 3D printing and material extrusion 3D printing requires high operating temperatures. Conversely, material jetting allows for compositional control at a voxel level and can dispense material at room temperature. Unfortunately, there are a limited number of materials that are both printable and biocompatible...
July 30, 2018: International Journal of Pharmaceutics
Haolong Shangguan, Jinwu Kang, Jihao Yi, Xiaochuan Zhang, Xiang Wang, Haibin Wang, Tao Huang
3D printing technologies have been used gradually for the fabrication of sand molds and cores for castings, even though these molds and cores are dense structures. In this paper, a generation method for lattice-reinforced thickness-varying shell molds is proposed and presented. The first step is the discretization of the STL (Stereo Lithography) model of a casting into finite difference meshes. After this, a shell is formed by surrounding the casting with varying thickness, which is roughly proportional to the surface temperature distribution of the casting that is acquired by virtually cooling it in the environment...
March 30, 2018: Materials
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