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Binder jetting process with ceramic powders: Influence of powder properties and printing parameters

OPEN CERAMICS 2022年 9卷

作者： Chen, Qirong Juste, Enrique Lasgorceix, Marie Petit, Fabrice Leriche, Anne Belgium Ceram Res Ctr Ave Gouverneur E Cornez 4 B-7000 Mons Belgium Univ Polytech Hauts De France Lab Mat Ceram & Proc Associes F-59313 Valenciennes France

Binder jetting (BJ) is an additive manufacturing process in which powder materials are selectively joined by a binder. BJ is plagued by its high sensitivity to both powder properties and process parameters which critically affect the quality of powder beds and final products. Alumina powder was used as a model material processed using different routes to obtain granules with various characteristics. Granule properties (particle size, morphology, flowability), characteristics of powder bed (roughness, packing density) and process parameters (binder saturation, layer thickness) were highly optimized in order to achieve the highest printed parts quality in terms of compressive strength and volume density. Optimized values reach 102.2 +/- 11.1 MPa and 64.2 +/- 1.9% T. D respectively which are close to expectations for this process. The paper serves as an aid in understanding the influence of powder properties and processing parameters and provides general guidelines to rapidly develop ceramic powders for conventional binder jetting process.

关键词： Binder jetting Powder properties printing parameters

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Relationship between FDM 3D printing parameters Study: Parameter Optimization for Lower Defects

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POLYMERS 2021年第13期13卷 2190-2190页

作者： Ferretti, Patrich Leon-Cardenas, Christian Santi, Gian Maria Sali, Merve Ciotti, Elisa Frizziero, Leonardo Donnici, Giampiero Liverani, Alfredo Alma Mater Studiorum Univ Bologna Dept Ind Engn I-40136 Bologna Italy

Technology evolution and wide research attention on 3D printing efficiency and processes have given the prompt need to reach an understanding about each technique's prowess to deliver superior quality levels whilst showing an economical and process viability to become mainstream. Studies in the field have struggled to predict the singularities that arise during most Fused Deposition Modeling (FDM) practices;therefore, diverse individual description of the parameters have been performed, but a relationship study between them has not yet assessed. The proposed study lays the main defects caused by a selection of printing parameters which might vary layer slicing, then influencing the defect rate. Subsequently, the chosen technique for optimization is presented, with evidence of its application viability that suggests that a quality advance would be gathered with such. The results would help in making the FDM process become a reliable process that could also be used for industry manufacturing besides prototyping purposes.

关键词： optimized FDM defects printing parameters optimization void occurrence

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3D printing parameters, supporting structures, slicing, and post-processing procedures of vat-polymerization additive manufacturing technologies: A narrative review

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JOURNAL OF DENTISTRY 2021年 109卷 103630-103630页

作者： Piedra-Cascon, Wenceslao Krishnamurthy, Vinayak R. Att, Wael Revilla-Leon, Marta Univ Complutense Madrid Fac Dent Dept Restorat Dent Madrid Spain Texas A&M Univ J Mike Walker 66 Dept Mech Engn College Stn TX USA Tufts Univ Sch Dent Med Dept Prosthodont Boston MA 02111 USA Texas A&M Univ Coll Dent Comprehens Dent Dept Dallas TX USA Univ Washington Sch Dent Dept Restorat Dent Seattle WA 98195 USA Revilla Res Ctr Madrid Spain

Objective: To review the elements of the vat-polymerization workflow, including the 3D printing parameters, support structures, slicing, and post-processing procedures, as well as how these elements affect the characteristics of the manufactured dental devices. Data: Collection of published articles related to vat-polymerization technologies including manufacturing workflow description, and printing parameters definition and evaluation of its influence on the mechanical properties of vat-polymerized dental devices was performed. Sources: Three search engines were selected namely Medline/PubMed, EBSCO, and Cochrane. A manual search was also conducted. Study selection: The selection of the optimal printing and supporting parameters, slicing, and post-processing procedures based on dental application is in continuous improvement. As well as their influence on the characteristics of the additively manufactured (AM) devices such as surface roughness, printing accuracy, and mechanical properties of the dental device. Results: The accuracy and properties of the AM dental devices are influenced by the technology, printer, and material selected. The printing parameters, printing structures, slicing methods, and the post-processing techniques significantly influence on the surface roughness, printing accuracy, and mechanical properties of the manufactured dental device;yet, the optimization of each one may vary depending on the clinical application of the additively manufactured device. Conclusions: The printing parameters, supporting structures, slicing, and post-processing procedures have been identified, but additional studies are needed to establish the optimal manufacturing protocol and enhance the properties of the AM polymer dental devices. CLINICAL SIGNIFICANCE: The understanding of the factors involved in the additive manufacturing workflow leads to a printing success and better outcome of the additively manufactured dental device.

关键词： 3D printing Additive manufacturing Polymers printing parameters Vat polymerization technologies

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Effect of printing parameters in 3D concrete printing: printing region and support structures

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JOURNAL OF MATERIALS PROCESSING TECHNOLOGY 2019年 271卷 261-270页

作者： Tay, Yi Wei Daniel Li, Ming Yang Tan, Ming Jen Nanyang Technol Univ Singapore Ctr 3D Printing Sch Mech & Aerosp Engn 50 Nanyang Ave Singapore 639798 Singapore

3D concrete printing can be used to build many complex structures. However, due to its material properties in the fresh state, it is difficult to construct overhanging structures without supports. In order to unleash the true capability of 3D concrete printing, a support structure is required to support any overhanging fresh material, which is usually removed during post-processing. This study demonstrates the feasibility of adjusting the printing parameters to print the main structure and support structure using a single type of building material. It was found that the solidity ratio, which is defined as the ratio between actual and expected filament sizes, was significantly affected by the nozzle travel speed and material volume flow rate. Furthermore, a gap distance characterisation test was carried out to find the maximum distance that the filament can cross over without a significant slump. The results were combined to determine the different printable regions for different operations. An overhang structure was printed to verify the results obtained for the different printing operations. This technique allows complex structure to be built without the need for human intervention throughout the printing process.

关键词： printing parameters 3D printing Support structure Cementitious material

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Materials Properties of Printable Edible Inks and printing parameters Optimization during 3D printing: a review

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CRITICAL REVIEWS IN FOOD SCIENCE AND NUTRITION 2019年第19期59卷 3074-3081页

作者： Feng, Chunyan Zhang, Min Bhandari, Bhesh Jiangnan Univ State Key Lab Food Sci & Technol Wuxi Jiangsu Peoples R China Jiangnan Univ Jiangsu Prov Key Lab Adv Food Mfg Equipment & Tec Wuxi Jiangsu Peoples R China Univ Queensland Sch Agr & Food Sci Brisbane Qld Australia

Background: Interest in additive manufacture has grown significantly in recent years, driving a need for printable materials that can sustain high strains and still fulfill their function in applications such as tissue engineering, regenerative medicine field, food engineering and field of aerospace, etc. As an emerging and promising technology, 3Dprinting has attracted more and more attention with fast manipulation, reduce production cost, customize geometry, increase competitiveness and advantages in many hot research areas. Many researchers have done a lot of investigations on printable materials, ranging from a single material to composite material. Main content: This review focuses on the contents of printable edible inks. It also gathers and analyzes information on the effects of printable edible ink material properties on 3D print accuracy. In addition, it discusses the impact of printing parameters on accurate printing, and puts forward current challenges and recommendations for future research and development.

关键词： Printable edible inks 3D food printing Materials properties printing parameters printing precision

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Effect of 3D printing Process parameters and Heat Treatment Conditions on the Mechanical Properties and Microstructure of PEEK Parts

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POLYMERS 2023年第9期15卷 2209-2209页

作者： Zhen, Honglei Zhao, Bin Quan, Long Fu, Junyu Taiyuan Univ Technol Coll Mech & Vehicle Engn Taiyuan 030024 Peoples R China

Fused deposition modeling (FDM) processed Poly-ether-ether-ketone (PEEK) materials are widely used in aerospace, automobile, biomedical, and electronics industries and other industries due to their excellent mechanical properties, thermal properties, chemical resistance, wear resistance, and biocompatibility, etc. However, the manufacture of PEEK materials and parts utilizing the FDM process faces the challenge of fine-tuning a list of process parameters and heat treatment conditions to reach the best-suiting mechanical properties and microstructures. It is non-trivial to make the selection only according to theoretical analysis while counting on a vast number of experiments is the general situation. Therefore, in this paper, the extrusion rate, filling angle, and printing orientation are investigated to adjust the mechanical properties of 3D-printed PEEK parts;then, a variety of heat treatment conditions were applied to tune the crystallinity and strength. The results show that the best mechanical performance is achieved at 1.0 times the extrusion rate, varied angle cross-fillings with +/- 10 degrees intervals, and vertical printing. Horizontal printing performs better with reduced warpage. Additionally, both crystallinity and mechanical properties are significantly improved after heat treatment, and the best state is achieved after holding at 300 degrees C for 2 h. The resulting tensile strength is close to 80% of the strength of injection-molded PEEK parts.

关键词： poly-ether-ether-ketone (PEEK) 3D printing printing parameters heat treatment mechanical properties

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Binder jetting of ceramics: Powders, binders, printing parameters, equipment, and post-treatment

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CERAMICS INTERNATIONAL 2019年第10期45卷 12609-12624页

作者： Lv, Xinyuan Ye, Fang Cheng, Laifei Fan, Shangwu Liu, Yongsheng Northwestern Polytech Univ Sci & Technol Thermostruct Composite Mat Lab Xian 710072 Shaanxi Peoples R China

Binder jetting is expected to become the universal process for preparing ceramic parts because it can overcome multiple problems, such as the difficulty to prepare complex-shaped ceramic parts and the shrinkage of the sintering process, which appear in conventional ceramic preparation process. This paper introduces principles, steps, and applications of binder jetting printing ceramics. Furthermore, five key factors of binder jetting printing ceramics (powders, binders, printing parameters, equipment, and post-treatment process) have been investigated. Accordingly, effects of powders (including shape, particle size and distribution, and additives), binders (including binding method, droplet-formation mechanism, and droplet-infiltration kinetics), printing parameters (including layer thickness, saturation, solid binder, and printing orientation), equipment, and post-treatment (including de-powdering process, and densification process) on density, roughness, strength, accuracy, and resolution of ceramic parts have been discussed and summarized. This paper provides detailed analysis of techniques and mechanisms of binder jetting of ceramics, giving guidance on how to handle raw materials and select various processing parameters for achieving desired performance.

关键词： Binder jetting Powders Binders printing parameters Equipment Post-treatment

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printing parameters and strengthening mechanism of pneumatic injection additive manufacturing with iron powder slurry

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INTERNATIONAL JOURNAL OF ADVANCED MANUFACTURING TECHNOLOGY 2018年第9-12期94卷 3809-3817页

作者： Wu, Wenzheng Du, Haidong Sui, Hang Guo, Xiaoyu Wang, Bofan Li, Guiwei Zhao, Ji Jilin Univ Sch Mech Sci & Engn Renmin St 5988 Changchun 130025 Jilin Peoples R China

Low-cost metal additive manufacturing remains difficult but would be of great practical value. To prepare slurry distributed evenly and stably, the present study thoroughly mixed metal powder, as a base material, with corresponding monomers, crosslinking agents, dispersant, initiator, and catalysts. A complex three-dimensional structure of iron powder slurry was built using a pneumatic injection additive manufacturing system. The effects of the injection pressure, platform speed, and nozzle diameter on the width of printed lines were studied. The stability of the width of a single printed line was investigated. It was found that the line width increases with an increase in the injection pressure or nozzle diameter and decreases with an increase in the moving speed of the platform. A reasonable drying, debinding, and sintering schedule was established, and the microstructures of dried, debinding, and sintered parts were analyzed. The sintered parts were denser than dried and debinding parts. The pneumatic injection additive manufacturing technology adopted in this study has the advantages of low manufacturing costs and a wide range of printing materials, and is applicable in the additive manufacturing of iron powder and a variety of other metal powders, thus widening the range of materials used in additive manufacturing.

关键词： Additive manufacturing Iron powder slurry Pneumatic injection printing parameters Strengthening mechanism

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Investigation on lemon juice gel as food material for 3D printing and optimization of printing parameters

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LWT-FOOD SCIENCE AND TECHNOLOGY 2018年 87卷 67-76页

作者： Yang, Fanli Zhang, Min Bhandari, Bhesh Liu, Yaping Jiangnan Univ State Key Lab Food Sci & Technol Wuxi 14122 Jiangsu Peoples R China Jiangnan Univ Yangzhou Food Biotechnol Inst Yangzhou 225002 Jiangsu Peoples R China Univ Queensland Sch Agr & Food Sci Brisbane Qld Australia Guangdong Galore Food Co Ltd Zhongshan 528447 Peoples R China

The aim of this paper is to develop a new 3D printing food constructs based on lemon juice gel system. We investigated the effect of potato starch (10, 12.5, 15, 17.5 and 20 g/100 g) on the rheological properties and mechanical properties of lemon juice gels. Besides, the influence of printing parameters (nozzle height, nozzle diameter, extrusion rate and nozzle movement speed) on the quality of printed products were also studied. The results show that it is suitable to make the size of the nozzle height the same with that of the nozzle diameter, which could not be regarded as a key factor that affects print quality. An equation is proposed to explain the relationship between extrusion rate, nozzle diameter and nozzle movement speed. In this printing system, the 1 mm nozzle diameter, 24 mm(3)/s extrusion rate and 30 mm/s nozzle movement speed were found to be the optimal parameters to print 3D constructs matching the target geometry with fine resolution, more smooth surface texture, and fewer point defects with no compressed deformation. (C) 2017 Elsevier Ltd. All rights reserved.

关键词： 3D food printing Additive manufacturing Fruit juice gel printing parameters Rheological properties NMR TPA

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4D printing of PLA/PCL composites with tunable shape memory properties via printing and programming parameters

Smart Manufacturing

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Smart Manufacturing 2024年第01N02期03卷

作者： Zhenning Liu Peng Gao Qian Wu Zhenguo Wang Jianyang Li Kunyang Wang Guiwei Li Xueli Zhou Zhengyi Song Bingqian Li Qingping Liu Key Laboratory of Bionic Engineering (Ministry of Education) Jilin University Changchun 130022 China

4D printing of biocompatible shape memory polymer materials is of great significance in the biomedical field. The addition of PCL material into PLA matrix is capable of modulating the elastic modulus of the material while remaining a reduced degradation rate. However, the influence of 4D printing parameters and shape programming parameters on their shape memory properties had not been systematically investigated. Here, we examine the effects of 4D printing process parameters and shape programming parameters on the shape memory properties of PLA/PCL composites. We first explore the effects of key printing parameters on the print quality and shape memory properties of pure PLA materials, and select composites with a PCL mass fraction of 15% to fully characterize their thermodynamic properties. The effects of programming stress and programming temperature on the shape memory properties of the PCL15 composites are analyzed. Finally, the artificial neural network algorithm is employed to optimize its programming parameters, and brings 5.76% enhancement of shape recovery ratio compared with that before optimization. This work provides a systematic study of the shape memory properties of 4D printed PLA/PCL composites, paving the way for promoting their application in the biomedical industry.

关键词： 4D printing PLA/PCL composites shape memory printing parameters programming parameters

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