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Artykuły w czasopismach na temat "Binder Jetting Printing"
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Sen, Koyel, Tanu Mehta, Anson W.K.Ma, and Bodhisattwa Chaudhuri. "DEM based investigation of powder packing in 3D printing of pharmaceutical tablets." EPJ Web of Conferences 249 (2021): 14012. http://dx.doi.org/10.1051/epjconf/202124914012.
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3D printing is emerging as one of the most promising methods to manufacture Pharmaceutical dosage forms as it offers multiple advantages such as personalization of dosage forms, polypill, fabrication of complex dosage forms etc. 3D printing came into existence in 1980s but its use was extended recently to pharmaceutical industry along with the approval of first 3D printed tablet Spritam by FDA in 2015. Spritam was manufactured by Aprecia pharmaceuticals using binder jetting technology. Binder jet 3D printing involves a hopper for powder discharge and printheads for ink jetting. The properties of tablets are highly dependent upon the discharge quality of powder mixture from the hopper and jetting of the ink/binder solution from the printhead nozzle. In this study, numerical models were developed using Discrete element method (DEM) to gain better understanding of the binder jet 3D printing process. The DEM modeling of hopper discharge was performed using in-house DEM code to study the effect of raw material attributes such as powder bed packing density (i.e. particle size, particle density etc) on the printing process, especially during powder bed preparation. This DEM model was further validated experimentally, and the model demonstrated good agreement with experimental results.
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Pyeon, Seongeun, Man Sig Lee, Dae-Won Park, and Jae Ho Baek. "Effects of Jetting Parameters and Sodium Silicate-Based Binder on Droplet Formation." Korean Journal of Metals and Materials 58, no. 4 (2020): 278–85. http://dx.doi.org/10.3365/kjmm.2020.58.4.278.
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Binder jetting additive manufacturing is one of the 3D printing technologies currently used to manufacture 3D geometries. In this process, a liquid binder agent is ejected to a desired position of a substrate. The binder’s properties and the jetting condition used for form droplets can affect the formability of the geometries. Herein, we optimized the solid content and jetting condition of a sodium silicate-based inorganic binder, for 3D printing. To observe the range of single droplet formation, the behavior of the discharged droplets was analyzed by Z value, which is the inverse of the Ohnesorge number. As the solid content increased, a higher driving voltage was required to form the droplets to overcome viscous dissipation. For 40S(Z = 4.33) with a content of 40 wt%, the droplet tail from the nozzle was stretched further. The droplets of 25S(Z = 15.09) with a content of 25 wt% were accompanied by satellite droplets. The jetting condition was optimized for 25S, which was capable of ejection at various driving voltages. Stable single droplets were formed at a driving voltage of 20 V and a dwell time of 4 μs. In addition, when ethylene glycol and glycerol were added into 25S as a humectant, stable droplets were formed under the optimum jetting condition, and each droplets was in the range of 2.70 < Z < 15.09.
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Acosta-Vélez, Giovanny, Chase Linsley, Timothy Zhu, Willie Wu, and Benjamin Wu. "Photocurable Bioinks for the 3D Pharming of Combination Therapies." Polymers 10, no. 12 (2018): 1372. http://dx.doi.org/10.3390/polym10121372.
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Combination therapies mediate drug synergy to improve treatment efficacy and convenience, leading to higher levels of compliance. However, there are challenges with their manufacturing as well as reduced flexibility in dosing options. This study reports on the design and characterization of a polypill fabricated through the combination of material jetting and binder jetting for the treatment of hypertension. The drugs lisinopril and spironolactone were loaded into hydrophilic hyaluronic acid and hydrophobic poly(ethylene glycol) (PEG) photocurable bioinks, respectively, and dispensed through a piezoelectric nozzle onto a blank preform tablet composed of two attachable compartments fabricated via binder jetting 3D printing. The bioinks were photopolymerized and their mechanical properties were assessed via Instron testing. Scanning electron microscopy (SEM) was performed to indicate morphological analysis. The polypill was ensembled and drug release analysis was performed. Droplet formation of bioinks loaded with hydrophilic and hydrophobic active pharmaceutical ingredients (APIs) was achieved and subsequently polymerized after a controlled dosage was dispensed onto preform tablet compartments. High-performance liquid chromatography (HPLC) analysis showed sustained release profiles for each of the loaded compounds. This study confirms the potential of material jetting in conjunction with binder jetting techniques (powder-bed 3D printing), for the production of combination therapy oral dosage forms involving both hydrophilic and hydrophobic drugs.
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Mirzababaei, Saereh, and Somayeh Pasebani. "A Review on Binder Jet Additive Manufacturing of 316L Stainless Steel." Journal of Manufacturing and Materials Processing 3, no. 3 (2019): 82. http://dx.doi.org/10.3390/jmmp3030082.
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Binder jet additive manufacturing enables the production of complex components for numerous applications. Binder jetting is the only powder bed additive manufacturing process that is not fusion-based, thus manufactured parts have no residual stresses as opposed to laser-based additive manufacturing processes. Binder jet technology can be adopted for the production of various small and large metallic parts for specific applications, including in the biomedical and energy sectors, at a lower cost and shorter lead time. One of the most well-known types of stainless steels for various industries is 316L, which has been extensively manufactured using binder jet technology. Binder jet manufactured 316L parts have obtained near full density and, in some cases, similar mechanical properties compared to conventionally manufactured parts. This article introduces methods, principles, and applications of binder jetting of SS 316L. Details of binder jetting processes, including powder characteristics (shape and size), binder properties (binder chemistry and droplet formation mechanism), printing process parameters (such as layer thickness, binder saturation, drying time), and post-processing sintering mechanism and densification processes, are carefully reviewed. Furthermore, critical factors in the selection of feedstock, printing parameters, sintering temperature, time, atmosphere, and heating rate of 316L binder jet manufactured parts are highlighted and summarized. Finally, the above-mentioned processing parameters are correlated with final density and mechanical properties of 316L components to establish a guideline on feedstock selection and process parameters optimization to achieve desired density, structure and properties for various applications.
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Lv, Xinyuan, Fang Ye, Laifei Cheng, Shangwu Fan, and Yongsheng Liu. "Binder jetting of ceramics: Powders, binders, printing parameters, equipment, and post-treatment." Ceramics International 45, no. 10 (2019): 12609–24. http://dx.doi.org/10.1016/j.ceramint.2019.04.012.
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Soutrenon, Mathieu, Gabriel Billato, and Fritz Bircher. "3D printing of cellulose by solvent on binder jetting." NIP & Digital Fabrication Conference 2018, no. 1 (2018): 166–69. http://dx.doi.org/10.2352/issn.2169-4451.2018.34.166.
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Mariani, Marco, Ruben Beltrami, Paolo Brusa, Carmen Galassi, Raffaele Ardito, and Nora Lecis. "3D printing of fine alumina powders by binder jetting." Journal of the European Ceramic Society 41, no. 10 (2021): 5307–15. http://dx.doi.org/10.1016/j.jeurceramsoc.2021.04.006.
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Mancuso, Elena, Naif Alharbi, Oana A. Bretcanu, et al. "Three-dimensional printing of porous load-bearing bioceramic scaffolds." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 231, no. 6 (2017): 575–85. http://dx.doi.org/10.1177/0954411916682984.
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This article reports on the use of the binder jetting three-dimensional printing process combined with sintering to process bioceramic materials to form micro- and macroporous three-dimensional structures. Three different glass-ceramic formulations, apatite–wollastonite and two silicate-based glasses, have been processed using this route to create porous structures which have Young’s modulus equivalent to cortical bone and average bending strengths in the range 24–36 MPa. It is demonstrated that a range of macroporous geometries can be created with accuracies of ±0.25 mm over length scales up to 40 mm. Hot-stage microscopy is a valuable tool in the definition of processing parameters for the sintering step of the process. Overall, it is concluded that binder jetting followed by sintering offers a versatile process for the manufacture of load-bearing bioceramic components for bone replacement applications.
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Jung-Hoon Choi, Kyu-Hong Hwang, Woo-Seok Cho, et al. "Improving ceramic monolith properties in binder jetting 3D printing using glass frit binders." Journal of Ceramic Processing Research 20, no. 5 (2019): 547–55. http://dx.doi.org/10.36410/jcpr.2019.20.5.547.
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Kessler, A., R. Hickel, and M. Reymus. "3D Printing in Dentistry—State of the Art." Operative Dentistry 45, no. 1 (2020): 30–40. http://dx.doi.org/10.2341/18-229-l.
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SUMMARY Three-dimensional (3D) printing is a rapidly developing technology that has gained widespread acceptance in dentistry. Compared to conventional (lost-wax technique) and subtractive computer numeric controlled methods, 3D printing offers process engineering advantages. Materials such as plastics, metals, and ceramics can be manufactured using various techniques. 3D printing was introduced over three decades ago. Today, it is experiencing rapid development due to the expiration of many patents and is often described as the key technology of the next industrial revolution. The transition to its clinical application in dentistry is highly dependent on the available materials, which must not only provide the required accuracy but also the necessary biological and physical properties. The aim of this work is to provide an up-to-date overview of the different printing techniques: stereolithography, digital light processing, photopolymer jetting, material jetting, binder jetting, selective laser sintering, selective laser melting, and fused filament fabrication. Additionally, particular attention is paid to the materials used in dentistry and their clinical application.
Rozprawy doktorskie na temat "Binder Jetting Printing"
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Ma, Da. "Improving the Strength of Binder Jetted Pharmaceutical Tablets Through Tailored Polymeric Binders and Powders." Thesis, Virginia Tech, 2020. http://hdl.handle.net/10919/101030.
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Additive Manufacturing (AM) provides a unique opportunity for fabrication of personalized medicine, where each oral dosage could be tailored to satisfy specific needs of each individual patient. Binder jetting, an easily scalable AM technique that is capable of processing the powdered raw material used by tablet manufacturers, is an attractive means for producing individualized pharmaceutical tablets. However, due to the low density of the printed specimens and incompatible binder-powder combination, tablets fabricated by this AM technology suffer from poor strength. The research is introducing an additional composition in the binder jetting powder bed (e.g., powdered sugar) could significantly enhance the compressive strength of the as-fabricated tablets, as compared with those tablets fabricated without the additional powder binding agent. However, no previous research demonstrated comprehensive approaches to enhance the poor performance of the 3D printed tablets. Therefore, the goal of this work is to identify processing techniques for improving the strength of binder jetted tablets, including the use of (i) novel jettable polymeric binders (e.g., 4-arm star polyvinylpyrrolidone (PVP), DI water, and different i) weight percentage of sorbitol binder) and (ii) introducing an additional powder binding agent into the powder bed (e.g.., different wt% of powdered sugar).M.S.
Three-dimensional printing is well-known as 3D printing. 3D printing pills are printed from the 3D printer. As of today, we now stand on the brink of a fourth industrial revolution. By the remarkable technological advancements of the twenty-first century, manufacturing is now becoming digitized. Instead of using a large batch process as traditional, customized printlets with a tailored dose, shape, size, and release characteristics could be produced on- demand. The goal of developing pharmaceutical printing is to reduce the cost of labor, shorten the time of manufacturing, and tailor the pills for patients. And have the potential to cause a paradigm shift in medicine design, manufacture, and use. This paper aims to discuss the current and future potential applications of 3D printing in healthcare and, ultimately, the power of 3D printing in pharmaceuticals.
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Bai, Yun. "Additive Manufacturing of Copper via Binder Jetting of Copper Nanoparticle Inks." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/95855.
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This work created a manufacturing process and material system based on binder jetting Additive Manufacturing to process pure copper. In order to reduce the sintered part porosity and shape distortion during sintering, the powder bed voids were filled with smaller particles to improve the powder packing density. Through the investigation of a bimodal particle size powder bed and nanoparticle binders, this work aims to develop an understanding of (i) the relationship between printed part properties and powder bed particle size distribution, and (ii) the binder-powder interaction and printed primitive formation in binder jetting of metals.
Bimodal powder mixtures created by mixing a coarse powder with a finer powder were investigated. Compared to the parts printed with the monosized fine powder constituent, the use of a bimodal powder mixture improved the powder flowability and packing density, and therefore increased the green part density (8.2%), reduced the sintering shrinkage (6.4%), and increased the sintered density (4.0%).
The deposition of nanoparticles to the powder bed voids was achieved by three different metal binders: (i) a nanoparticles suspension in an existing organic binder, (ii) an inorganic nanosuspension, and (iii) a Metal-Organic-Decomposition ink. The use of nanoparticle binders improved the green part density and reduced the sintering shrinkage, which has led to an improved sintered density when high binder saturation ratios were used. A new binding mechanism based on sintering the jetted metal nanoparticles was demonstrated to be capable of (i) providing a permanent bonding for powders to improve the printed part structural integrity, and (ii) eliminating the need for organic adhesives to improve the printed part purity.
Finally, the binder-powder interaction was studied by an experimental approach based on sessile drop goniometry on a powder bed. The dynamic contact angle of binder wetting capillary pores was calculated based on the binder penetration time, and used to describe the powder permeability and understand the binder penetration depth. This gained understanding was then used to study how the nanoparticle solid loading in a binder affect the binder-powder interactions and the printed primitive size, which provided an understanding for determining material compatibility and printing parameters in binder jetting.PHD
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Yousaf, Daowd, and Kaveh javdanierfani. "Binder Jetting Additive Manufacturing Technology : The Effects of Build Orientation on The Printing Quality." Thesis, Högskolan i Halmstad, Akademin för företagande, innovation och hållbarhet, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hh:diva-45142.
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In recent years, multi-jet fusion technology became more popular as it has unlimited potential. Thanks to this technology, it became possible to produce products with complex geometries.This gives a massive advantage compared to the conventional manufacturing process, as by utilising 3D printers, the costs and environmental impact are reduced exponentially with regards to the fact that this is a new technology. Product quality is one of the most important factors when it comes to product manufacturing for a company to stay competitive in the market. This study was conducted in FABLAB at Halmstad University. The research focuses on different aspects of the fabricated test artefacts, such as surface roughness, tensile strength and dimensional deviation. How different printing parameters can affect the printing quality of the printed parts is then analysed. The result is then compared with designed CAD model. During this study, some experiments were conducted by printing test samples at different build orientations to define the printing quality. Measurement is conducted on the different test artefacts and quantified. The effect from build orientation on surface roughness, tensile strength and dimension accuracy were studied during this thesis. The test samples were measured by using appropriate measuring equipment that was available at Halmstad University. From the test results, it becomes clear that the build orientation directly impacts the printing quality of the printed test samples from the HP multi-jet fusion 3D printer
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Snelling, Dean Andrew Jr. "A Process for Manufacturing Metal-Ceramic Cellular Materials with Designed Mesostructure." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/51606.
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The goal of this work is to develop and characterize a manufacturing process that is able to create metal matrix composites with complex cellular geometries. The novel manufacturing method uses two distinct additive manufacturing processes: i) fabrication of patternless molds for cellular metal castings and ii) printing an advanced cellular ceramic for embedding in a metal matrix. However, while the use of AM greatly improves the freedom in the design of MMCs, it is important to identify the constraints imposed by the process and its process relationships.
First, the author investigates potential differences in material properties (microstructure, porosity, mechanical strength) of A356 — T6 castings resulting from two different commercially available Binder Jetting media and traditional 'no-bake' silica sand. It was determined that they yielded statistically equivalent results in four of the seven tests performed: dendrite arm spacing, porosity, surface roughness, and tensile strength. They differed in sand tensile strength, hardness, and density.
Additionally, two critical sources of process constraints on part geometry are examined: (i) depowdering unbound material from intricate casting channels and (ii) metal flow and solidification distances through complex mold geometries. A Taguchi Design of Experiments is used to determine the relationships of important independent variables of each constraint. For depowdering, a minimum cleaning diameter of 3 mm was determined along with an equation relating cleaning distance as a function of channel diameter. Furthermore, for metal flow, choke diameter was found to be significantly significant variable.
Finally, the author presents methods to process complex ceramic structure from precursor powders via Binder Jetting AM technology to incorporate into a bonded sand mold and the subsequently casted metal matrix. Through sintering experiments, a sintering temperature of 1375 °C was established for the ceramic insert (78% cordierite). Upon printing and sintering the ceramic, three point bend tests showed the MMCs had less strength than the matrix material likely due to the relatively high porosity developed in the body. Additionally, it was found that the ceramic metal interface had minimal mechanical interlocking and chemical bonding limiting the strength of the final MMCs.Ph. D.
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Snelling, Jr Dean Andrew. "A Process for Manufacturing Metal-Ceramic Cellular Materials with Designed Mesostructure." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/51606.
Pełny tekst źródłaStreszczenie:
The goal of this work is to develop and characterize a manufacturing process that is able to create metal matrix composites with complex cellular geometries. The novel manufacturing method uses two distinct additive manufacturing processes: i) fabrication of patternless molds for cellular metal castings and ii) printing an advanced cellular ceramic for embedding in a metal matrix. However, while the use of AM greatly improves the freedom in the design of MMCs, it is important to identify the constraints imposed by the process and its process relationships.
First, the author investigates potential differences in material properties (microstructure, porosity, mechanical strength) of A356 — T6 castings resulting from two different commercially available Binder Jetting media and traditional 'no-bake' silica sand. It was determined that they yielded statistically equivalent results in four of the seven tests performed: dendrite arm spacing, porosity, surface roughness, and tensile strength. They differed in sand tensile strength, hardness, and density.
Additionally, two critical sources of process constraints on part geometry are examined: (i) depowdering unbound material from intricate casting channels and (ii) metal flow and solidification distances through complex mold geometries. A Taguchi Design of Experiments is used to determine the relationships of important independent variables of each constraint. For depowdering, a minimum cleaning diameter of 3 mm was determined along with an equation relating cleaning distance as a function of channel diameter. Furthermore, for metal flow, choke diameter was found to be significantly significant variable.
Finally, the author presents methods to process complex ceramic structure from precursor powders via Binder Jetting AM technology to incorporate into a bonded sand mold and the subsequently casted metal matrix. Through sintering experiments, a sintering temperature of 1375 °C was established for the ceramic insert (78% cordierite). Upon printing and sintering the ceramic, three point bend tests showed the MMCs had less strength than the matrix material likely due to the relatively high porosity developed in the body. Additionally, it was found that the ceramic metal interface had minimal mechanical interlocking and chemical bonding limiting the strength of the final MMCs.Ph. D.
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Mummareddy, Bhargavi. "Additive Manufacturing Processes for High-Performance Ceramics: Manufacturing - Mechanical and Thermal property Relationship." Youngstown State University / OhioLINK, 2021. http://rave.ohiolink.edu/etdc/view?acc_num=ysu1629131959379597.
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Ramírez, Jiménez Guillermo. "Electric sustainability analysis for concrete 3D printing machine." Thesis, KTH, Skolan för elektroteknik och datavetenskap (EECS), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-258928.
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Nowadays, manufacturing technologies become more and more aware of efficiency and sustainability. One of them is the so called 3D printing. While 3D printing is often linked to plastic, the truth is there are many other materials that are being tested which could have several improvements over plastics.One of these options is stone or concrete, which is more suitable the architecture and artistic fields. However, due to its nature, this new technology involves the use of new techniques when compared to the more commonly used 3D printers. This implies that it could interesting to know how much energy efficient these techniques are and how can they be improved in future revisions.This thesis is an attempt to disclose and analyze the different devices that make up one of these printers and with this information, build a model that accurately describes its behavior.For this purpose, the power is measured at many points and later it is analyzed and fitted to a predefined function. After the fitting has been done, an error is calculated to show how accurate the model is when compared to the original data.It was found that many of these devices produce power spikes due to its nonlinear behavior. This behavior is usually related to switching, and can avoided with different devices.Finally, some advice is given focused on future research and revisions, which could be helpful for safety, efficiency and quality.Numera blir tillverkningstekniken alltmer medveten om effektivitet och hållbarhet. En av dem är den så kallade 3Dutskriften. Medan 3Dutskrift ofta är kopplad till plast, är verkligheten att det finns många andra material som testas, vilket kan ha flera förbättringar över plast.Ett av dessa alternativ är sten eller betong, vilket är mer lämpligt inom arkitektur och konstnärliga fält. På grund av sin natur inbegriper denna nya teknik användningen av nya tekniker jämfört med de vanligare 3Dskrivarna. Detta innebär att det kan vara intressant att veta hur mycket mer energieffektiva dessa tekniker är och hur de kan förbättras i framtida revisioner.Denna avhandling är ett försök att studera och analysera de olika enheter som utgör en av dessa skrivare och med denna information, bygga en modell som exakt beskriver dess beteende.För detta ändamål mäts effekten på många punkter och senare analyseras och anpassas den till en fördefinierad funktion. Efter anpassning har gjorts beräknas felet för att visa hur exakt modellen är jämfört med originaldata.Det visade sig att många av dessa enheter producerar spänningsspikar på grund av dess olinjära beteende. Detta beteende är vanligtvis relaterat till omkoppling och kan undvikas med olika enheter.Slutligen ges några råd om framtida forskning och revideringar, vilket kan vara till hjälp för säkerhet, effektivitet och kvalitet.
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Jhuang, Fu-An, and 莊馥安. "Study on Effect of Binder Jetting Parameters in 3D Sand Mold Printing." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/6zz8jh.
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碩士國立臺灣科技大學
機械工程系
106
The core technology of 3D sand mold printing is Piezoelectric inkjet head. The inkjet head selectively prints droplets onto the building platform by controlling the waveform. The waveform parameters influence the droplet properties which affect the dimension and quality of the printed object. Therefore, this study researches properties of piezo print head, including waveform parameters, droplet properties and the size of the printed object. This study uses the high-speed camera to observe the ink-jet type and the appropriate ink-jet parameters and establish a 3D sand mold printing system to discuss the printing quality of influencing factors. As a result, the voltage is higher, the deviation value of printed object is bigger and the deviation is always caused by layer of printing beginning. In addition, the more inkjet quantity, the higher strength and the better formability it will be, but it causes the more deviation of dimension. So it’s hard to balance those influencing factors. Therefore, this study provides a printing strategy which is use gray level printing and the experimental results of testing. The strategy uses the lower deviation of waveform parameters at layer of beginning. After that, increase inkjet quantity to get the higher strength. Finally, this work achieves the deviation of dimension less than 10% under the 300kgf strength.
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Caldeira, João Afonso Lupi de Ordaz. "Large scale Binder jet printing using waste materiais." Master's thesis, 2021. http://hdl.handle.net/10400.8/5534.
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Additive manufacturing (AM) is especially suited for unique objects or low production
batches since it does not require expensive tooling. The AM market has undergone enormous
growth, even though there is still a significant limitation in this technology type when
producing large parts.
Powder bed technology, particularly binder jetting, allows the production of several types
of materials. The print size is directly related to the machine’s build volume size when using
powder bed technology. Moreover, materials used in powder bed processes are usually
high-cost materials, making large prints not affordable. Instead of working with high-cost
types of powder, it is possible to replace them with low cost, biodegradable materials, like
wood, or waste materials like ground tire (GTW). Using materials such as this allows low-cost
production parts while contributing to the incorporation of residues that otherwise would have
to be discarded, with a low environmental impact.
This work studies the usage of waste materials in small grains and calibrated dust with
different sizes as a matrix in a binder jetting machine with a build volume of 1m3. Wood dust
and GTW are being studied and additives can be added to the bulk material to affect the
powder deposit ability, printing behavior, final part properties and post-processing behavior.
It was possible to produce test specimens, but the machine had to be refilled each layer
manually. The rest of the printing process was made automatically, producing specimens
that were tested successfully.
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Li, Kun-Hung, and 李坤泓. "Study of a Binder Jetting Based Mold 3D Printing System by using Multiple Piezoelectric Heads." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/cnajxf.
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碩士國立臺灣科技大學
自動化及控制研究所
106
Recently, it is necessary to manufacture larger scale parts quickly and mass-produced by molds. The most common method for making molds is sand casting. The traditional process method applied the wooden mold to make the sand mold. However, the sand molds and cores have different strength requirements which are restricted to the part’s complexity. It costs highly, and must be designed and manufactured separately. It results in longer develop time. Therefore, the purpose of this study is to setup a Binder-Jetting (BJ)-based additive manufacturing system with multiple piezoelectric heads by using commercial sand and furan resin. The system can print sand molds with different strength requirements such as sand cores by employing grey and waveform design methods simultaneously. Finally, some casted parts were obtained from the printed sand molds with casting molten metal. The developed system utilizes a PC-Based controller to integrate multiple piezoelectric heads, motion control, continuous ink supply module, paving mechanism, and the human-machine interface which was written by C#. The used piezoelectric head has a total of 1024 nozzles in eight rows. The resolution of 400 dpi can be obtained by using all rows. By using width combination of three piezoelectric heads, the effective printing range can be up to 280 mm long, 194 mm wide, 200 mm high, with a minimum layer thickness of 0.3 mm and a printing capacity of 3.91 L/hr. The molds can be printed under different bonding strengths by using a gray scale pattern to control the amount of printed ink by the piezoelectric nozzle with a corresponding waveform design. Through the pressure test, one can measure the bond strength of the printed mold to verify the relationship between the amount of sprayed ink and the bond strength of the mold. At the same time, referring to the required part of the casting grade C license, the mold is designed into upper and lower molds, and printed by this system. After the molds were assembled, the casting part of the A356 cast aluminum is successfully achieved after the cooling and solidification process. Keywords: additive manufacturing, binder jetting, piezoelectric waveform, sand mold strength.
Części książek na temat "Binder Jetting Printing"
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Holland, Sonia, Tim Foster, and Chris Tuck. "Creation of Food Structures Through Binder Jetting." In Fundamentals of 3D Food Printing and Applications. Elsevier, 2019. http://dx.doi.org/10.1016/b978-0-12-814564-7.00009-2.
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Günther, Daniel, and Florian Mögele. "Additive Manufacturing of Casting Tools Using Powder-Binder- Jetting Technology." In New Trends in 3D Printing. InTech, 2016. http://dx.doi.org/10.5772/62532.
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Rahman, Ziyaur, Naseem A. Charoo, Mathew Kuttolamadom, Amir Asadi, and Mansoor A. Khan. "Printing of personalized medication using binder jetting 3D printer." In Precision Medicine for Investigators, Practitioners and Providers. Elsevier, 2020. http://dx.doi.org/10.1016/b978-0-12-819178-1.00046-0.
Pełny tekst źródłaStreszczenia konferencji na temat "Binder Jetting Printing"
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Li, Ming, Wenchao Du, Alaa Elwany, Zhijian Pei, and Chao Ma. "Binder Jetting Additive Manufacturing of Metals: A Literature Review." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2994.
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Abstract Binder jetting, also known as 3D printing, is an additive manufacturing (AM) technology utilizing a liquid-based binding agent to selectively join the material in a powder bed. It is capable of manufacturing complex-shaped parts with a variety of materials. This paper provides an overview of binder jetting of metals with a discussion about the knowledge gaps and research opportunities. The review deals with two parameter categories in terms of the material and process and their impacts. The achieved density, dimensional accuracy, and mechanical strength are summarized and analyzed. Further in-depth consideration of densification is discussed corresponding to various attributes of the packing, printing, and sintering behaviors. Though binder jetting has attracted increasing attention in the past several years, this fabrication process is not well studied. The understanding of powder spreading process and binder-powder interaction is crucial to the development of binder jetting but insufficient. In addition, the lack of investigation on the mechanical behavior of binder jetting metal part restricts the actualization of its wide-range applications.
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James, Sagil, and Cristian Navarro. "Molecular Dynamics Simulation of Nanoparticle Infiltration During Binder Jet Printing Additive Manufacturing Process: A Preliminary Study." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2872.
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Abstract Binder Jetting Process involves binding layers of powder material through selective deposition of a liquid binder. Binder jetting is a fast and relatively inexpensive process which does not require a high-powered energy source for printing purpose. Additionally, the binder jetting process is capable of producing parts with extreme complexities without using any support structures. These characteristics make binder jetting an ideal choice for several applications including aerospace, biomedical, energy, and several other industries. However, a significant limitation of binder jetting process is its inability to produce printed parts with full density thereby resulting in highly porous structures. A possible solution to overcome the porosity problems is to infiltrate the printed structures with low-melting nanoparticles. The infiltrating nanoparticles help fill up the voids to densify the printed parts and also aids in the sintering of the printed green parts. In addition to increasing the density, the nanoparticle infiltration also helps improve the mechanical, thermal and electrical properties of the printed part along with bringing multi-functionality aspect. Currently, there is a lack of clarity of the nanoparticle infiltration process performed to improve the quality of parts fabricated through binder jetting. This research employs Molecular Dynamics simulation techniques to investigate the nanoparticle infiltration during binder jetting additive manufacturing process. The simulation is performed at different operating temperatures of 1400 K, 1500 K, and 1600 K. The study found that the infiltration process is significantly affected by the operating temperature. The infiltration height is found to be highest at the operating temperature of 1600 K while the porosity reduction is found to be maximum at 1500 K. The infiltration kinetics is affected by the cohesion of the nanoparticles causing blockage of channels at higher operating temperatures. The simulation model is validated by comparing with the Lucas-Washburn infiltration model. It is seen that the simulation model deviates from the theoretical prediction suggesting that multiple mechanisms are driving the infiltration process at the nanoscale.
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Hayes, Austin C., and Gregory L. Whiting. "Powder-Binder Jetting Large-Scale, Metal Direct-Drive Generators: Selecting the Powder, Binder, and Process Parameters." In ASME 2019 Power Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/power2019-1853.
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Abstract Additive manufacturing enables the production of complex geometries extremely difficult to create with conventional subtractive methods. While good at producing complex parts, its limitations can be seen through its penetration into everyday manufacturing markets. Throughput limitations, poor surface roughness, limited material selection, and repeatability concerns hinder additive manufacturing from revolutionizing all but the low-volume, high-value markets. This work characterizes combining powder-binder jetting with traditional casting techniques to create large, complex metal parts. Specifically, we extend this technology to wind turbine generators and provide initial feasibility of producing complex direct-drive generator rotor and stator designs. In this process, thermal inkjet printer heads selectively deposit binder on hydroperm casting powder. This powder is selectively solidified and baked to remove moisture before being cast through traditional methods. This work identifies a scalable manufacturing process to print large-scale wind turbine direct drive generators. As direct-drive generators are substantially larger than their synchronous counterparts, a printing process must be able to be scaled for a 2–5 MW 2–6m machine. For this study, research on the powder, binder, and printing parameters is conducted and evaluated for scalability.
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Chen, Han, and Yaoyao F. Zhao. "Learning Algorithm Based Modeling and Process Parameters Recommendation System for Binder Jetting Additive Manufacturing Process." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-47627.
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Binder Jetting (BJ) process is an additive manufacturing process in which powder materials are selectively joined by binder materials. Products can be manufactured layer by layer directly from 3D model data. It is not always easy for manufacturing engineers to choose proper BJ process parameters to meet the end-product quality and fabrication time requirements. This is because the quality properties of the products fabricated by BJ process are significantly affected by the process parameters. And the relationships between process parameters and quality properties are very complicated. In this paper, a process model is developed by Backward Propagation (BP) Neural Network (NN) algorithm based on 16 groups of orthogonal experiment designed by Taguchi Method to express the relationships between 4 key process parameters and 2 key quality properties. Based on the modeling results, an intelligent parameters recommendation system is developed to predict end-product quality properties and printing time, and to recommend process parameters selection based on the process requirements. It can be used as a guideline for selecting the proper printing parameters in BJ to achieve the desired properties and help to reduce the printing time.
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Impens, David, and Ruth Jill Urbanic. "An Analysis of Variation Correlating Post Processing Infiltrate Types, Build Parameters and Mechanical Characteristics for Binder Jet Built Parts." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52615.
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The 3D Printing (3DP) “binder jetting” process is an additive manufacturing process that fabricates components and assemblies by layering powered material, and applying a binder where a ‘solid interior’ should be. This process creates brittle components as a powder is set with a weak binder material; however, the component strength characteristics can be significantly modified when infiltrating the component during post processing operations. The different factors that can influence the mechanical properties when engaging in post-processing operations need to be understood. A full factorial design of experiments (DOE) is conducted for tensile, compressive, and flexural specimens for 10 infiltrate and various build conditions. The experiment and resultants are set up to perform an analysis of variance (ANOVA). All of the observed stress-strain curves for the specimens are non-linear, or have limited linear regions. The infiltrate absorption depth affects the mechanical characteristics, and the binder jetting specimens are stronger in compression than tension. The tensile test results are similar to those of biological materials. Certain infiltrates do not improve the mechanical performance characteristics, which are validated using the Tukey method. This research needs to be extended in scope to include additional build orientations as well as torsion, fatigue, and notch tests to be able to predict model sensitivities effectively for components built using the binder jetting process, and to develop optimization strategies, which include time, material, and strength conditions.
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Clares, Ana Paula, and Guha Manogharan. "Discrete-Element Simulation of Powder Spreading Process in Binder Jetting, and the Effects of Powder Size." In ASME 2021 16th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2021. http://dx.doi.org/10.1115/msec2021-63351.
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Abstract Binder Jetting has gained particular interest amongst Additive Manufacturing (AM) techniques because of its wide range of applications, broader feasible material systems, and absence of rapid melting-solidification issues present in other AM processes. Understanding and optimizing printing parameters during the powder spreading process is essential to improve the quality of the final part. In this study, a Discrete Element Method (DEM) simulation is employed to evaluate the powder packing density, flowability, and porosity during powder spreading process utilizing three different powder groups. Two groups are formed with monoidal size distributions (75–84 μm and 100–109 μm), and the third one consisting of a bimodal distribution (50 μm + 100 μm). A thorough investigation into the effects of powder size distribution during the powder spreading step in a binder jetting process is conducted using ceramic foundry sand. It was observed that coarser particles result in higher flowability (62% decrease in repose angle) than finer ones due to the cohesion effect present in the latter. A bimodal size distribution yields the highest packing density (8% increase) and lowest porosity (∼12% reduction) in the powder bed, as the finer particles fill in the voids created between the coarser ones. Findings from this study are directly applicable to binder-jetting AM process, and also offer new insights for AM powder manufacturers.
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Mansfield, Brooke, Sabrina Torres, Tianyu Yu, and Dazhong Wu. "A Review on Additive Manufacturing of Ceramics." In ASME 2019 14th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/msec2019-2886.
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Abstract Additive manufacturing (AM), also known as 3D printing, has been used for rapid prototyping due to its ability to produce parts with complex geometries from computer-aided design files. Currently, polymers and metals are the most commonly used materials for AM. However, ceramic materials have unique mechanical properties such as strength, corrosion resistance, and temperature resistance. This paper provides a review of recent AM techniques for ceramics such as extrusion-based AM, the mechanical properties of additively manufactured ceramics, and the applications of ceramics in various industries, including aerospace, automotive, energy, electronics, and medical. A detailed overview of binder-jetting, laser-assisted processes, laminated object manufacturing (LOM), and material extrusion-based 3D printing is presented. Finally, the challenges and opportunities in AM of ceramics are identified.
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Elliott, Amelia M., Ayyoub Mehdizadeh Momen, Michael Benedict, and James Kiggans. "Experimental Study of the Maximum Resolution and Packing Density Achievable in Sintered and Non-Sintered Binder-Jet 3D Printed Steel Microchannels." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-53428.
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Developing high-resolution 3D printed metallic microchannels is a challenge especially when there is an essential need for high packing density of the primary metal. While high packing density could be achieved by heating the structure to the sintering temperature, some heat sensitive applications require other strategies to improve the packing density of primary metal. In this study the goal is to develop microchannels with high green (bound) or pack densities on the scale of 100–300 microns which have a robust mechanical structure. Binder-jet 3D printing is an additive manufacturing process in which droplets of binder are deposited via inkjet into a bed of powder. By repeatedly spreading thin layers of powder and depositing binder into the appropriate 2D profiles, complex 3D objects can be created one layer at time. Microchannels with features on the order of 500 microns were fabricated via binder jetting of steel powder and then sintered and/or infiltrated with a secondary material. The droplet volume of the inkjet-deposited binder was varied along with the print orientation. The resolution of the process, the subsequent features sizes of the microchannels, and the overall microchannel quality were studied as a function of droplet volume, orientation, and infiltration level.
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Maravola, Michael, Pedro Cortes, Michael Juhasz, et al. "Development of a Low Coefficient of Thermal Expansion Composite Tooling via 3D Printing." In ASME 2018 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/imece2018-88594.
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The use of additive manufacturing (AM) provides an opportunity to fabricate composite tooling rapidly and cost effectively. This project appears to have demonstrated the use of an additive technology for the production of composite processing tools. In particular, this work has addressed tooling that is functional in the range of autoclave temperatures around 300–350°F. This has led to the use of Invar and ceramic materials for use in composite molding tools because of their relatively low coefficient of thermal expansion (CTE) performance, which is in range to that commonly displayed by carbon fiber reinforced composites during their solidifying-curing process. In this project, two main approaches have been considered. The first approach consisted on using binder jetting for 3D printing sand molds to cast molten Invar to produce the composite tooling. Indeed, 3D sand printing offers the ability to cast complex geometries without the geometric limitations associated with conventional pattern making. The second innovative approach was based on printing a mold based on silica sand and infiltrating it with a polymer to yield a robust ceramic composite tooling. An additional technology using a Hybrid Direct Energy Deposition (DED) System for cladding Invar upon a steel molding structure has also been considered for producing potential composite tooling. Indeed, this unique approach could represent a promising technology for producing low cost composite tooling since only a small layer of Invar would be printed upon a non-expensive substrate. The results have shown that the aforementioned processes have successfully resulted on low CTE composite tooling molds. This work presents innovative AM processes by initially investigating 3D ceramic systems for composite tooling.