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Journal articles on the topic 'SLS process'

Author: Grafiati

Published: 4 June 2021

Last updated: 17 February 2022

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1

Floersheim, R. Bruce, Gene Hou, and Kent Firestone. "CFPC material characteristics and SLS prototyping process." Rapid Prototyping Journal 15, no. 5 (2009): 339–45. http://dx.doi.org/10.1108/13552540910993860.

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2

Bae, Sung-Woo, Seong-Yeon Yoo, and Dong-Soo Kim. "An Experimental Study for Drawing of Optimal Process Condition in the SLS Process." Journal of manufacturing engineering & technology 21, no. 3 (2012): 516–24. http://dx.doi.org/10.7735/ksmte.2012.21.3.516.

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3

Monzon, Mario D., Rubén Paz, Fernando Ortega, Jose A. Chapela, and Claudio Conde. "Process for reinforcing SLS parts by epoxy resin." Rapid Prototyping Journal 21, no. 3 (2015): 322–28. http://dx.doi.org/10.1108/rpj-08-2013-0079.

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Purpose – The purpose of this paper is to report on the use of a combination of selective laser sintering (SLS) and vacuum casting to create plastic composites made by additive manufacturing. Design/methodology/approach – The research has been carried out by approaching a new concept of the final part consistent in a plastic component, where the main body is made by SLS and the internal long fibres for reinforcing are made by vacuum casting of high-resistance epoxy resin. The part is designed for optimal number and distribution of the internal fibres taking into account the target relative sti

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4

Hofland, Eva C., Ismet Baran, and Dagmar A. Wismeijer. "Correlation of Process Parameters with Mechanical Properties of Laser Sintered PA12 Parts." Advances in Materials Science and Engineering 2017 (2017): 1–11. http://dx.doi.org/10.1155/2017/4953173.

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Selective laser sintering (SLS) is an additive manufacturing technique that enables the production of customized, complex products. SLS has proven itself a viable prototyping tool and production method for noncritical products. The industry has picked up on the potential of SLS, which raised the question whether it is possible to produce functional products with reproducible mechanical properties for application in critical sectors. Properties of SLS parts highly depend on the applied process settings. Hence, present work examined the influence of key process parameters (preheating temperature

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5

Hayashi, Terutake, Katsuhiro Maekawa, Liew Loy Seng, Shinichi IIDA, and Tomoya SUZUKI. "The application of blazing process in SLS process fabricated heat exchanger." Proceedings of the Materials and processing conference 2003.11 (2003): 147–48. http://dx.doi.org/10.1299/jsmemp.2003.11.147.

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6

Tiwari, Sunil Kumar, Sarang Pande, Santosh M. Bobade, and Santosh Kumar. "Assessment of mechanical properties and flammability of magnesium oxide/PA12 composite material for SLS process." Rapid Prototyping Journal 25, no. 1 (2019): 176–86. http://dx.doi.org/10.1108/rpj-07-2017-0145.

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Purpose The purpose of this paper is to propose and develop PA2200-based composite powder containing 0-15 Wt.% magnesium oxide before directly using it in selective laser sintering (SLS) machine to produce end-use products for low-volume production in the engineering applications with keen focus to meet the functional requirements which rely on material properties. Design/methodology/approach The methodology reported emphasises PA2200-based composite powder containing 0-15 Wt.% magnesium oxide development for SLS process which starts with preparation and characterisation of composite material,

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7

Becker, Mark, Stefan Pfeffer, Patrick Springer, Mario Cardenas, and Oliver Refle. "Komponentenintegration in additiv gefertigte Bauteile/Interruption of the selective laser sintering process and resulting options." wt Werkstattstechnik online 111, no. 06 (2021): 378–84. http://dx.doi.org/10.37544/1436-4980-2021-06-22.

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Die additive Fertigung von Kunststoffbauteilen mit dem selektiven Lasersintern (SLS) hat sich für diverse Anwendungen etabliert und bietet durch die großen geometrischen Freiheiten vielfältige Anwendungsmöglichkeiten. Weitere Anwendungen wären zu erschließen, wenn diskrete Bauteile vollständig integriert werden könnten, sodass hybride Bauteile entstehen. Daher wurde am Fraunhofer IPA untersucht, ob und wie der SLS-Prozess unterbrochen und Komponenten vollständig umdruckt werden können. &nbsp; The additive manufacturing of plastic components by means of selective laser sintering (SLS) is es

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8

Xie, Wen Juan, Wei Ling Zhao, Jia Zhang, and Jin Hui Liu. "Discussion on Binding Additives and Binding Process in Selective Laser Sintering." Advanced Materials Research 299-300 (July 2011): 1056–59. http://dx.doi.org/10.4028/www.scientific.net/amr.299-300.1056.

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Binding additives used in selective laser sintering (SLS) of metal powders determine the vital performance of untreated metal prototypes. The types of polymer binding materials were presented in this work. The binding conditions and processes were represented. The thermal variations of binding additives and interfaces actions between polymer and metal were discussed. This work provides a reference for the selection of polymer binding additives in SLS.

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9

Brighenti, Roberto, Mattia Pancrazio Cosma, Liviu Marsavina, Andrea Spagnoli, and Michele Terzano. "Laser-based additively manufactured polymers: a review on processes and mechanical models." Journal of Materials Science 56, no. 2 (2020): 961–98. http://dx.doi.org/10.1007/s10853-020-05254-6.

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Abstract Additive manufacturing (AM) is a broad definition of various techniques to produce layer-by-layer objects made of different materials. In this paper, a comprehensive review of laser-based technologies for polymers, including powder bed fusion processes [e.g. selective laser sintering (SLS)] and vat photopolymerisation [e.g. stereolithography (SLA)], is presented, where both the techniques employ a laser source to either melt or cure a raw polymeric material. The aim of the review is twofold: (1) to present the principal theoretical models adopted in the literature to simulate the comp

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10

Wilcox, Sherman. "Searching for Language: Process, Not Product." Sign Language Studies 1, no. 4 (2001): 333–43. http://dx.doi.org/10.1353/sls.2001.0021.

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11

Shi, Yunsong, Wei Zhu, Chunze Yan, Jinsong Yang, and Zhidao Xia. "Preparation and selective laser sintering of a new nylon elastomer powder." Rapid Prototyping Journal 24, no. 6 (2018): 1026–33. http://dx.doi.org/10.1108/rpj-11-2017-0223.

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Purpose This study aims to report the preparation, selective laser sintering (SLS) processing and properties of a new nylon elastomer powder. The effects of solvent, dissolution temperature and time and cooling method and speed on the particle size and morphologies of the prepared nylon elastomer powder are investigated. Design/methodology/approach The prepared nylon elastomer power possesses the particle size of around 50 mm and is spherical in shape, indicating that this study provides the feasible dissolution-precipitation process, a distillation cooling method and a suitable solvent to pre

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12

Song, Changhui, Aibing Huang, Yongqiang Yang, Zefeng Xiao, and Jia-kuo Yu. "Effect of energy input on the UHMWPE fabricating process by selective laser sintering." Rapid Prototyping Journal 23, no. 6 (2017): 1069–78. http://dx.doi.org/10.1108/rpj-09-2015-0119.

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Purpose This study aims to achieve customized prosthesis for total joint arthroplasty and total hip arthroplasty. Selective laser sintering (SLS) as additive manufacturing could enable small-scale fabrication of customized Ultra High Molecular Weight Polyethylene (UHMWPE) components; however, the processes for SLS of UHMWPE need to be improved. Design/methodology/approach This paper begins by improving the preheating system of the SLS fabricating equipment and then fabricating cuboids with the same size and cuboids with same volume and different size to study the warpage, demonstrating the eff

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13

Saprykin, A. A., Egor A. Ibragimov, and V. I. Yakovlev. "Influence of Mechanical Activation of Powder on SLS Process." Applied Mechanics and Materials 682 (October 2014): 143–47. http://dx.doi.org/10.4028/www.scientific.net/amm.682.143.

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The paper presents the results of the experiment, describing the effect of mechanical activation of powder Cu and Ni on the nature of their SLS-sintering method. The changes in structure and bulk density of powders after mechanical activation are revealed, which generally has a positive effect on the synthesis process of a product.Intorduction

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14

Hur, Sung-Min, Kyung-Hyun Choi, Seok-Hee Lee, and Pok-Keun Chang. "Determination of fabricating orientation and packing in SLS process." Journal of Materials Processing Technology 112, no. 2-3 (2001): 236–43. http://dx.doi.org/10.1016/s0924-0136(01)00581-7.

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15

Wang, Xiangwei. "Calibration of shrinkage and beam offset in SLS process." Rapid Prototyping Journal 5, no. 3 (1999): 129–33. http://dx.doi.org/10.1108/13552549910278955.

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16

Liu, H. J., Y. M. Li, Yuan Hao, X. P. Dong, and N. Y. Huang. "Study of Rapid Casting Process Based on SLS Prototypes." Key Engineering Materials 291-292 (August 2005): 593–96. http://dx.doi.org/10.4028/www.scientific.net/kem.291-292.593.

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17

Wang, Rong-Ji, Lingling Wang, Lihua Zhao, and Zijian Liu. "Influence of process parameters on part shrinkage in SLS." International Journal of Advanced Manufacturing Technology 33, no. 5-6 (2006): 498–504. http://dx.doi.org/10.1007/s00170-006-0490-x.

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18

Sachdeva, Anish, Sharanjit Singh, and Vishal S. Sharma. "Investigating surface roughness of parts produced by SLS process." International Journal of Advanced Manufacturing Technology 64, no. 9-12 (2012): 1505–16. http://dx.doi.org/10.1007/s00170-012-4118-z.

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19

Abou Antoun, Alain, Myriam Brochu, and Heinrich Möller. "Effect of the Rheocasting Process and of the SLS Layer on the Fatigue Behavior of 357 Aluminum Alloy." Solid State Phenomena 217-218 (September 2014): 227–34. http://dx.doi.org/10.4028/www.scientific.net/ssp.217-218.227.

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Two objectives were targeted: 1) compare the high cycle fatigue behavior of rheocast aluminum alloy 357 prepared by the swirl enthalpy equilibration device (SEED) and by the Council for Scientific and Industrial Research (CSIR) process, and 2) study the effect of surface liquid segregation (SLS) on the fatigue behavior of the CSIR material. Rectangular hourglass specimens machined from rheocast plates were tested at four stress amplitudes in axial fatigue with a stress ratio of R = -1 and a frequency of 20 Hz. Results obtained for SLS free specimens show that the SEED and the CSIR processes pr

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20

Liu, H. J., Y. M. Li, Yuan Hao, N. Y. Huang, and Yu Sheng Shi. "Study on the Dimensional Precision of the Polymer SLS Prototype." Key Engineering Materials 291-292 (August 2005): 597–602. http://dx.doi.org/10.4028/www.scientific.net/kem.291-292.597.

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Selective Laser Sintering (SLS) has many advantages such as fast building speed, wide range of materials, complicate shape of prototype and simple post-treatment. However, the shrinkage and mechanical stresses result in lost of the accuracy. This paper investigates the dimension precision of polymer SLS prototypes and proposes methods to control dimensions in suitable degree. The influencing factors of dimensional precision in the file preparation of CAD model, manufacturing system of SLS prototype and sintering process are analyzed. It indicates that the sintering shrinkage in sintering proce

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21

Kim, W. J., H. H. Nguyen, H. Y. Kim, M. T. Nguyen, H. S. Park, and J. C. Kim. "Sintering and Microstructures of SUS 316L Powder Produced by 3D Printing Process." Archives of Metallurgy and Materials 62, no. 2 (2017): 1215–18. http://dx.doi.org/10.1515/amm-2017-0180.

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AbstractSelective laser sintering (SLS) is a type of laminating sintering technique, using CO2laser with (metal, polymer, and ceramic) powders. In this result, the flake SUS 316L was used to achieve a high porous product, and compare to spherical type. After SLS, the porosity of flake-type sample with 34% was quite higher than that of the spherical-type one that had only 11%. The surface roughness of the flake SLS sample were also investigated in both inner and surface parts. The results show that the deviation of the roughness of the surface part is about 64.40μm, while that of the internal o

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22

Liu, Jie. "Experimental Research on Fabrication Process of Metal Powder for SLS." Applied Mechanics and Materials 665 (October 2014): 17–20. http://dx.doi.org/10.4028/www.scientific.net/amm.665.17.

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In this paper, Vibration-suspense-type process is used to develop a new material, metal or porcelain powder coated with resin or ceramic powder, then it can be sintered and formed without large-power laser. One set of vibration-suspense-type powder-coating equipment is developed and powder material suitable for SLS can be prepared with the equipment. The moving status and the moving process of powder granule in the vibration-suspense-type process are also analyzed. Based on the equipment, Polystyrene-Al powder material, which is suitable for SLS, is successfully prepared. And the optimum proce

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23

Nakamoto, Takayuki, Nobuhiko Shirakawa, Yoshio Miyata, Takumi Sone, and Haruyuki Inui. "Selective Laser Sintering and Subsequent Gas Nitrocarburizing of Low Carbon Steel Powder." International Journal of Automation Technology 2, no. 3 (2008): 168–74. http://dx.doi.org/10.20965/ijat.2008.p0168.

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Optimum conditions for laser irradiation to achieve fully dense SLS (Selective Laser Sintering) specimens have been investigated for S15C steel, in order to check the industrial feasibility of the SLS process. The mechanical properties of SLS processed S15C steel as well as the surface hardenability have also been investigated. The volume fraction of pores in S15C steel decreases as the scan speed, scan spacing and layer thickness decrease and as the laser power increases, so that the density of SLS specimens increases as the energy density increases. The specimens sintered at an energy densit

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24

Zeng, Zhi, Xiaohu Deng, Jiangmei Cui, Hai Jiang, Shuo Yan, and Bei Peng. "Improvement on Selective Laser Sintering and Post-Processing of Polystyrene." Polymers 11, no. 6 (2019): 956. http://dx.doi.org/10.3390/polym11060956.

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Amorphous polymers are heavily utilized materials in selective laser sintering (SLS) due to their good dimensional accuracy. However, sintered parts of amorphous polymers cannot be used as functional parts owing to their poor forming performance, including their low relative densities and tensile strength. Therefore, post-processing methods are employed to enhance the mechanical properties of amorphous polymers SLS parts without damaging their relatively high dimensional accuracy. In this study, the forming process of selective laser sintering (SLS) and post-processing on polystyrene (PS) was

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25

Baloni, Sunil Dutt, Somesh K. Sharma, Jagroop Singh, and Sushant Negi. "SLS Process Parameter Optimization to Improve Surface Quality and Accuracy of Polyamide Parts." International Journal of Manufacturing, Materials, and Mechanical Engineering 11, no. 4 (2021): 57–74. http://dx.doi.org/10.4018/ijmmme.2021100104.

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The contribution of selective laser sintering (SLS) technique in the 4.0 manufacturing industry is undisputedly significant. SLS part quality exhibits high dependence on SLS process parameters and is a major challenge. Therefore, this research aims to investigate the effect of input parameters (i.e., part orientation, bed temperature, and layer thickness) on the surface roughness and accuracy of laser-sintered polyamide specimens. Response surface methodology (RSM) and ANOVA analysis aided the testing and evaluation. Optimal working conditions for minimum shrinkage were 0.17 mm layer thickness

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Gobal, Arash, and Bahram Ravani. "An Adaptive Discrete Element Method for Physical Modeling of the Selective Laser Sintering Process." Applied Mechanics and Materials 869 (August 2017): 69–84. http://dx.doi.org/10.4028/www.scientific.net/amm.869.69.

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Selective Laser Sintering (SLS) has recently become one of the fastest growing additive manufacturing processes due to its capability of fabricating metal parts with high dimensional accuracy and surface quality. Physical modeling of this process plays an important role in properly controlling the process parameters of the process. In this paper, we present a 3 dimensional, adaptive discrete element method for simulation of the SLS process on personal computers. The presented method models the laser-powder interaction at particle level, achieving high simulation accuracy while adaptively incre

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27

Wang, Yiwei, Lin Wang, Zhen Hu, et al. "The Thermodynamic and Kinetic Effects of Sodium Lignin Sulfonate on Ethylene Hydrate Formation." Energies 14, no. 11 (2021): 3291. http://dx.doi.org/10.3390/en14113291.

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Hydrate-based technologies (HBTs) have high potential in many fields. The industrial application of HBTs is limited by the low conversion rate of the water into hydrate (RWH), and sodium lignin sulfonate (SLS) has the potential to solve the above problem. In order to make the HBTs in the presence of SLS applied in industry and promote the advances of commercial HBTs, the effect of SLS on the thermodynamic equilibrium hydrate formation pressure (Peq) was investigated for the first time, and a new model (which can predict the Peq) was proposed to quantitatively describe the thermodynamic effect

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Harada, Yuu, Yoshiki Ishida, Daisuke Miura, et al. "Mechanical Properties of Selective Laser Sintering Pure Titanium and Ti-6Al-4V, and Its Anisotropy." Materials 13, no. 22 (2020): 5081. http://dx.doi.org/10.3390/ma13225081.

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Selective laser sintering (SLS) is being developed for dental applications. This study aimed to investigate the properties of Ti-6Al-4V and pure titanium specimens fabricated using the SLS process and compare them with casting specimens. Besides, the effect of the building direction on the properties of the SLS specimens was also investigated. Specimens were prepared by SLS using Ti-6Al-4V powder or pure titanium powder. Casting specimens were also prepared using Ti-6Al-4V alloys and pure titanium. The mechanical properties (tensile strength and elongation), physical properties (surface roughn

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29

Li, Xiaopeng, Brecht Van Hooreweder, Wout Lauwers, et al. "Thermal simulation of the cooling down of selective laser sintered parts in PA12." Rapid Prototyping Journal 24, no. 7 (2018): 1117–23. http://dx.doi.org/10.1108/rpj-10-2016-0176.

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Purpose The cooling process of polymer components fabricated by selective laser sintering (SLS) plays a vital role in determining the crystallinity, density and the resultant properties of the produced parts. However, the control and optimization of the cooling process remains challenging. The purpose of this paper is to therefore investigate the cooling process of the SLS fabricated polyamide 12 (PA12) components through simulations. This work provides necessary fundamental insights into the possibilities for optimization and control of this cooling process for achieving desired properties. D

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Avakh Darestani, Soroush, and Mina Nasiri. "Statistical process control." International Journal of Quality & Reliability Management 33, no. 1 (2015): 2–24. http://dx.doi.org/10.1108/ijqrm-08-2013-0130.

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Purpose – In this context, process capability indices (PCI) reveal the process zones base on specification limits (SLs). Most of the research on control charts assumed certain data. However, to measure quality characteristic, practitioners sometimes face with uncertain and linguistic variables. Fuzzy theory is one of the most applicable tools which academia has employed to deal with uncertainty. The paper aims to discuss these issues. Design/methodology/approach – In this investigation, first, fuzzy and S control chart has been developed and second, the fuzzy formulation of the PCIs such as C

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31

Zhao, Chang-Cheng, Gui-Hun Jiang, and Jong-Bang Eun. "Optimization of Drying Process for Squid-Laver Snack by a Combined Method of Fuzzy Synthetic and Response Surface Methodology." Journal of Food Quality 2017 (2017): 1–10. http://dx.doi.org/10.1155/2017/9761356.

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The aim of this study was to investigate the effects of drying temperature (50–70°C) and drying time (3–5 h) on the physical properties and quality of squid-laver snack (SLS) using response surface methodology combined with a synthetic evaluation method to optimize the drying process conditions. Moisture content, water activity, color (L⁎, a⁎, b⁎), shear force, and overall acceptability were evaluated as responses. Increased drying times and higher temperatures significantly reduced the moisture content and water activity of SLS from 9.07% to 4.76% and 0.136 to 0.056, respectively (p<0.05).

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32

KIM, DONG SOO, SUNG WOO BAE, and KYUNG HYUN CHOI. "APPLICATION AND PERFORMANCE EVALUATION FOR THE DMS SYSTEM IN THE SLS PROCESS." International Journal of Modern Physics B 22, no. 09n11 (2008): 1833–38. http://dx.doi.org/10.1142/s0217979208047493.

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A Solid Freeform Fabrication (SFF) system using Selective Laser Sintering (SLS) is currently recognized as a leading process and SLS extends the applications to machinery and automobiles due to the various materials employed. Especially, accuracy and processing time are very important factors when the desired shape is fabricated with Selective Laser Sintering (SLS), one of Solid Freeform Fabrication (SFF) system. In the convectional SLS process, laser spot size is fixed during laser exposing on the sliced figure. Therefore, it is difficult to accuracy and rapidly fabricates the desired shape.

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Bahr, Matthew Nathan, Dimple Modi, Sarsvatkumar Patel, Gossett Campbell, and Gregory Stockdale. "Understanding the Role of Sodium Lauryl Sulfate on the Biorelevant Solubility of a Combination of Poorly Water-Soluble Drugs Using High Throughput Experimentation and Mechanistic Absorption Modeling." Journal of Pharmacy & Pharmaceutical Sciences 22 (June 20, 2019): 221–46. http://dx.doi.org/10.18433/jpps30347.

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This study investigates the influence of surfactant sodium lauryl sulfate (SLS) on the solubility of poorly-water soluble drug substances, model Compound X and Compound Y, used in a fixed dose combination oral solid dosage form. To determine the impact of SLS concentration on the solubility of compounds X and Y, we experimentally determined the critical micelle concentration (CMC) of SLS in water, simulated gastric fluid (SGF), and fed state simulated intestinal fluid (FeSSIF) in the presence of Compound X and Compound Y using UV/Visible spectrophotometry at 25°C. The aggregation of SLS was ch

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34

Teixeira, Luiz Alberto Cesar, Mariana de Faria Gardingo, Lidia Yokoyama, and Fabiana Valeria da Fonseca Araujo. "Degradation of surfactant SLS in water by singlet oxygen generated by the reaction between hydrogen peroxide and hypochlorite." Water Supply 12, no. 6 (2012): 810–17. http://dx.doi.org/10.2166/ws.2012.057.

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The synergistic aqueous combination of hydrogen peroxide and hypochlorite which results in the formation of the highly oxidizing intermediate species singlet oxygen (1O2) was effective in the degradation of the anionic surfactant sodium lauryl sulphate (SLS) in water. The process was effective in the near neutral pH range of 6–8, and up to initial SLS concentration values of 10 mg/L. For initial [SLS] = 5 or 10 mg/L, pH = 6–8, and excess molar ratio ([H2O2] + [NaClO])/[SLS] = 5:1 it was possible to achieve a final concentration of [SLS] &lt; 0.5 mg/L (95% degradation) in t = 60 min at 25 °

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de Oliveira Setti, Grazielle, Jorge Vicente Lopes da Silva, Marcelo Fernandes de Oliveira, et al. "Surface methods for monitoring the densification of parts in the selective laser sintering process." Rapid Prototyping Journal 20, no. 2 (2014): 157–63. http://dx.doi.org/10.1108/rpj-05-2012-0040.

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Purpose – The purpose of this paper is to characterize polyamide parts prepared by the SLS process using techniques that are dependent on surface properties and compare the results to density measurements in order to assess which technique better reflects the degree of densification achieved using different laser power levels. Design/methodology/approach – Fabrication of Nylon 12 (Duraform PA) samples and their characterization by apparent density measurements, perfilometry, Raman spectroscopy, scanning electron microscopy, specific surface area and contact angle measurements. Findings – Metho

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36

Nikolic, Kostantin P. "Stochastic Search Algorithms for Identification, Optimization, and Training of Artificial Neural Networks." Advances in Artificial Neural Systems 2015 (February 28, 2015): 1–16. http://dx.doi.org/10.1155/2015/931379.

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This paper presents certain stochastic search algorithms (SSA) suitable for effective identification, optimization, and training of artificial neural networks (ANN). The modified algorithm of nonlinear stochastic search (MN-SDS) has been introduced by the author. Its basic objectives are to improve convergence property of the source defined nonlinear stochastic search (N-SDS) method as per Professor Rastrigin. Having in mind vast range of possible algorithms and procedures a so-called method of stochastic direct search (SDS) has been practiced (in the literature is called stochastic local sear

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37

Choi, Jae Beom, Young-Jin Chang, Cheol-Ho Park, et al. "9.2: Sequential Lateral Solidification (SLS) Process for Large Area AMOLED." SID Symposium Digest of Technical Papers 39, no. 1 (2008): 97. http://dx.doi.org/10.1889/1.3069845.

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38

Wudy, Katrin, Maximilian Drexler, Lydia Lanzl, and Dietmar Drummer. "Analysis of time dependent thermal properties for high rates in selective laser sintering." Rapid Prototyping Journal 24, no. 5 (2018): 894–900. http://dx.doi.org/10.1108/rpj-01-2017-0013.

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Purpose The thermal history during laser exposure determines part properties in selective laser sintering (SLS). The purpose of this study is to introduce a new measurement technique based on a CO2 laser unit combined with a high-speed DCS. A first comparison of the thermal history during laser exposure measured with Laser-high-speed-(HS)-differential scanning calorimetry-(DSC) and in SLS process is shown. Design/methodology/approach This Laser-HS-DSC allows an imitation of the SLS-process in a very small scale, as the sample is directly heated by a CO2 laser. For this study, the laser power a

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39

Qin, Xu, and Jian Zhang. "Based on Grey Relational Analysis Research on Fabrication Parameters of Polypropylene Part by Selective Laser Sintering." Applied Mechanics and Materials 513-517 (February 2014): 351–54. http://dx.doi.org/10.4028/www.scientific.net/amm.513-517.351.

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In the modern manufacturing the 3D printing technology is the largest reform. The Selective Laser Sintering (SLS) occupies a special place in a hierarchical manufacturing technology. In the SLS process the shrinkage brought the ports size decreased and caused the warp. The fabrication parameters in SLS process played a major influence on the molding accuracy. With the sintering process of Polypropylene composite powder, the fabrication parameters were investigated. Through the gray relational analysis to manipulate the test date about the warp and molding accuracy, we could determine the impac

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40

Zhang, Hong Feng, and Wei Hang Chang. "Rapid Manufacturing Technique of Casting Mould Based on the SLS." Advanced Materials Research 291-294 (July 2011): 2970–73. http://dx.doi.org/10.4028/www.scientific.net/amr.291-294.2970.

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Selective laser sintering (SLS) is one of relatively mature rapid prototyping technologies at present day. This paper takes the forming of a high voltage switch casting model in the AFS-3000 rapid prototyping system as example to describe the forming process of SLS, and introduce the casting model rapid prototyping technology based on SLS. This research provides a powerful technological support for rapid development of casting products.

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Launhardt, Martin, Christopher Fischer, and Dietmar Drummer. "Research on the Influence of Geometry and Positioning on Laser Sintered Parts." Applied Mechanics and Materials 805 (November 2015): 105–14. http://dx.doi.org/10.4028/www.scientific.net/amm.805.105.

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In contrary to the traditional injection molding process, the selective laser sintering process offers a nearly unlimited freedom of design. However, the dimensional accuracy of an SLS part is significantly influenced by the process, the material and its design. In order to achieve high accuracy, the parts need to be repositioned, parameters readjusted and parts consistently rebuilt in an iterative process. In industry this process leads to enormous consumption of process time and polymer powder.Increased dimensional inaccuracy is often caused by the accumulation of polymer melt and the result

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Fagundes, Pâmela, Thaís Karoline Carniel, Lais Regina Mazon, et al. "Antimicrobial Activity of the Sodium Lauryl Sulphate Used as Surfactant in the Polymeric Encapsulation Processes." Materials Science Forum 1012 (October 2020): 500–505. http://dx.doi.org/10.4028/www.scientific.net/msf.1012.500.

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Miniemulsion polymerization process is a very versatile technique used for the polymeric encapsulation of the many essential oils. In this process some surfactant compounds are used to define the capsules characteristics, as an example the Sodium Lauryl Sulphate (SLS) that is one of the most used surfactants. But, after the miniemulsion polymerization synthesis the residual amount of SLS can manifest an antimicrobial action that can improve or to prejudice the final properties of the encapsulated products, depending of its percentual concentrations. In this sense, the objective of this work wa

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Cheah, C. M., K. F. Leong, C. K. Chua, K. H. Low, and H. S. Quek. "Characterization of microfeatures in selective laser sintered drug delivery devices." Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine 216, no. 6 (2002): 369–83. http://dx.doi.org/10.1243/095441102321032166.

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From initial applications in the fields of prosthesis, implants, surgery planning, anthropology, paleontology and forensics, the scope of rapid prototyping (RP) biomedical applications has expanded to include areas in tissue engineering (TE) and controlled drug delivery. In the current investigation, the feasibility of utilizing selective laser sintering (SLS) to fabricate polymeric drug delivery devices (DDDs) that are difficult to make using conventional production methods was studied. Two features, namely porous microstructure and dense wall formation, inherent in SLS fabricated parts were

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Naiju, C. D., M. Adithan, P. Radhakrishnan, and K. Annamalai. "A Study on Topology of Lateral Surface of Components Manufactured by Selective Laser Sintering." Advanced Materials Research 584 (October 2012): 357–60. http://dx.doi.org/10.4028/www.scientific.net/amr.584.357.

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This work presents the results of a study carried out to determine the topology of lateral surface and its effect on the process parameters of components manufactured by selective laser sintering (SLS). Using Taguchi’s experimental technique, an orthogonal array of L4 had been developed. Surface roughness was measured along built direction and analysis of variance (ANOVA) technique was used to investigate the effect of process parameters and to identify main process parameter that influences surface roughness on SLS components. It has been found that slice thickness and scan spacing have more

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Ma'ruf, Anwar, Bambang Pramudono, and Nita Aryanti. "Synthesis of Natural Surfactant of Sodium Lignosulfonate from Rice Husk Lignin by Ultrasound Assisted - Sulfonation." Key Engineering Materials 775 (August 2018): 20–25. http://dx.doi.org/10.4028/www.scientific.net/kem.775.20.

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Sodium lignosulfonate (SLS) is one of natural surfactant that can be modified from lignin. The utilization of natural surfactant of SLS is widely studied by researchers. This paper will study the synthesis of a natural surfactant of SLS from rice husk lignin by ultrasound assisted – sulfonation and the characteristics of SLS based on FTIR spectra. The reaction was carried out at the temperature of 60 °C and the time of 30 minutes. From the experiment can be concluded that sulfonation process with ultrasonic irradiation has advantages compared with conventional heating, i.e. lower temperature,

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Luo, Xiao Qing, Xiao Yan Lin, Xue Gang Luo, and Yan Chen. "Sodium Lignosulphonate-Polyvinyl Alcohol Bioadsorbent: Synthesis, Characterization and Adsorption for Pb (II)." Materials Science Forum 620-622 (April 2009): 193–96. http://dx.doi.org/10.4028/www.scientific.net/msf.620-622.193.

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A novel sodium lignosulphonate (SLS)-polyvinyl alcohol (PVA) spherical macroporous bioadsorbent (SLSP) was synthesized by reversed phase suspension polymerization. Comparing with powdery and high water solubility SLS, this new spherical bioadsorbent exhibited relative stability under static force. SEM and FTIR proved the cross-linking of SLS and PVA. TG curves of SLS and SLSP indicated that the thermal property of SLS had been improved by cross-linking modification. Meanwhile, comprehensive adsorption study of Pb (II) on this bioadsorbent was conducted regarding the effects of time, initial PH

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Ahmetshin, Rinat G., Vasiliy V. Fedorov, Kirill S. Kostikov, et al. "SLS Setup and its Working Procedure." Key Engineering Materials 685 (February 2016): 477–81. http://dx.doi.org/10.4028/www.scientific.net/kem.685.477.

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The given paper presents the flowchart of the worked out SLS print setup. The setup consists of a laser source, a reactor tube, a laser sweeping system (scanatory system), a control unit, a gas supply and pumping-out system, a melting process visual review system. The paper covers the results of the given setup operation, introduces a sample made with the use of SLS printing and some of its parameters.

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Brajlih, Tomaz, Urska Kostevsek, and Igor Drstvensek. "Influence of part’s geometrical properties on shrinkage and laser heat affected zone size at selective laser sintering." Rapid Prototyping Journal 25, no. 1 (2019): 208–20. http://dx.doi.org/10.1108/rpj-01-2018-0032.

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Purpose One of the main problems of selective laser sintering (SLS) manufacturing process is the dimensional accuracy of products. Main causes of dimensional deviations are material shrinkage and size of laser heat affected zone (LHAZ). This paper aims to present a new method of adapting SLS manufacturing shrinkage and LHAZ compensation parameters to the geometrical characteristics of processed parts to improve their accuracy. Design/methodology/approach The first part of this work presents a hypothesis asserting that the shrinkage and the LHAZ size depend on geometrical properties of products

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Zeng, Wei Liang, Yan Ling Guo, Ying Liu, et al. "A New Rice Husk-Plastic Composite Powder Preparation Process for Selective Laser Sintering Fabrication." Advanced Materials Research 750-752 (August 2013): 1577–81. http://dx.doi.org/10.4028/www.scientific.net/amr.750-752.1577.

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A new powder material, rice husk-plastic composite powder (RPC), was successfully developed for selective laser sintering (SLS) process. RPC is mainly composed of rice husk powder and a hot-melt adhesive powder, it is a green and biological material and its most important advantage is low-cost, but because the hull surface of rice is burr and not smooth, easily jammed between particles, poor mobility, is not the medium of easy flowing, so mixing process was successfully developed to prepare RPC powders. The preparation process is divided to three steps. First, before mix, the rice husk power i

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YAAGOUBI, Hanane, Hamid ABOUCHADI, and Mourad TAHA JANAN. "Review on the modeling of the laser sintering process for Polyamide 12." E3S Web of Conferences 234 (2021): 00006. http://dx.doi.org/10.1051/e3sconf/202123400006.

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One of the most promising additive manufacturing techniques is selective laser sintering (SLS) of thermoplastic materials. However, the materials successfully applicable to laser sintering (LS) are very limited today. In this study the exceptional position of polyamide 12 powders is underlined. Several numerical and experimental studies have been carried out to make comparisons between the use of powdered materials for polyamide 12 and other types of polymers during the SLS process. The complexity of this process and the interaction between the different phenomena involved has not been fully u

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