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Wyświetlanie 1-10 z 10
Tytuł:
Problems of determination of MultiJet 3D printing distortions using a 3D scanner
Autorzy:
Nowacki, J.
Sieczkiewicz, N.
Powiązania:
https://bibliotekanauki.pl/articles/1818509.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
3D printing technology
3D printing distortions
methods of combining 3D scans
3D scanners
technologia druku 3D
zniekształcenia druku 3D
metody łączenia skanów 3D
skanery 3D
Opis:
Purpose: Analysis and the review of 3D scanning methods, methods of combining 3D scans and tables available on the market (rotary, tilt and turn) as non-destructive testing systems of polymer materials. As the problem of deformation testing of elements produced by 3D printing is relatively novel, so far a small number of publications on this subject have been observed in terms of current solutions in the area of methodology and devices. Design/methodology/approach: 3D print samples have been prepared using MultiJet Printing (MJP), also called PolyJet Printing. The first sample was left in a UV oven and the second one in a dark cabinet, without access to sunlight (standard conditions 23/50 as described in ISO 554:1976). Non-contact structured blue light 3D metrology grade scanner was used to capture the entire part geometry for inspection. A comparison of subsequent scans after postcuring with reference scans after printing can indicate dimensional changes. The resulting scans are detailed enough to monitor shape and size changes over time. Findings: Universal 3D printing model beneficial in distortion analysis has been proposed. The method of evaluating 3D print distortions was verified using a metrology class 3D scanner. The results of this study show that deformations are declining through time to near the same values, the only difference is the rate of change of dimensions. Practical implications: Due to popularity and lower cost of polymer 3D printing, in comparison to metal 3D printing, an initial attempt to analyse the distortion of the locally melted substrate was done using MultiJet 3D printing with photopolymer material. The universal 3D print test part was proposed for verification of 3D printing deformations. Finally, the framework for the determination of 3D printing distortions is presented, taking into account the influence of UV postcuring. Originality/value: Analysis of a method to measure 3D printing distortions using a metrology grade 3D scanner is presented in the paper. Recently, this matter is becoming more and more important because many prototypes are increasingly produced by 3D printing and 3D printing distortions may cause many difficulties during the manufacturing and assembly process.
Źródło:
Archives of Materials Science and Engineering; 2020, 103, 1; 30--41
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigating the capability of low-cost FDM printers in producing microfluidic devices
Autorzy:
Haouari, K.B.
Ouardouz, M.
Powiązania:
https://bibliotekanauki.pl/articles/24200549.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
microfluidics
FDM
3D printing
additive manufacturing
mikroprzepływy
druk 3D
produkcja addytywna
Opis:
Purpose: This paper aims to investigate the possibilities of using 3D printing by fused deposition modelling (FDM) technology for developing micro-fluidic devices by printing a benchmark test part. A low-cost desktop printer is evaluated to compare the minimum possible diameter size, and accuracy in the microchannel body. Design/methodology/approach: The parts were designed using SolidWorks 2016 CAD software and printed using a low-cost desktop FDM printer and Polylactic acid (PLA) filament. Findings: Desktop 3D printers are capable of printing open microchannels with minimum dimensions of 300 μm width and 200 μm depth. Research limitations/implications: Future works should focus on developing new materials and optimizing the process parameters of the FDM technique and evaluating other 3D printing technologies and different printers. Originality/value: The paper shows the possibility of desktop 3D printers in printing microfluidic devices and provides a design of a benchmark part for testing and evaluating printing resolution and accuracy.
Źródło:
Archives of Materials Science and Engineering; 2022, 115, 1; 5--12
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of 3D printing MJP and FDM technology in dentistry
Autorzy:
Taczała, J.
Czepułkowska, W.
Konieczny, B.
Sokołowski, J.
Kozakiewicz, M.
Szymor, P.
Powiązania:
https://bibliotekanauki.pl/articles/1818497.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
CAD/CAM
dental materials
FDM
MJP
3D printing
materiały dentystyczne
drukowanie 3D
Opis:
Purpose: Many printers are tempting at low prices, but later their accuracy turns out to be insufficient. The study has included checking the accuracy of printing and reproducing details of 3D printers used in dental technology and dentistry such as MultiJet Printing (ProJet MP3000, 3D Systems) and Fused Deposition Modelling (Inspire S2000, Tiertime). Design/methodology/approach: The 3D prints were created from scans of the maxillary gypsum model with the loss of left premolar. In the test, objects were set to the X and Y-axis. In order to check the dimensional differences after printing, scans of the printed models were superimposed on scans of the plaster model in the GOM Inspect V8 SR1 (Braunschweig, Germany). The focus was on the distance of scans from each other and a deviation map was created for each object. Findings: The average absolute value of deviations for each of models were equalled: FDM- for X-axis 0.06 ± 0.04 mm, for Y-axis 0.07 ± 0.04 mm; MJP- for X-axis- 0.04 ± 0.02 mm, for Y-axis- 0.06 ± 0.02 mm. A chart of arithmetic averages calculated for each tooth for the best printouts in each series show that higher deviation values exist in case of FDM printout. The models printed in the X-axis have smaller values of deviations from those printed in the Y-axis. Practical implications: MultiJet Printing technology can be used to create more precise models than the FDM, but these printouts meet the requirements of dimensional accuracy too. Originality/value: CAD / CAM technology in the future will exist in every dental technology laboratory so it is important to be aware of the way the 3D printers works. By paying attention to the quality of detail reproduction, a Dental Technician is able to choose the best 3D printer for them.
Źródło:
Archives of Materials Science and Engineering; 2020, 101, 1; 32--40
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of selected properties of PLA used in 3D printing
Autorzy:
Sośniak, K.
Biela, D.
Szalaty, D.
Ścieszka, M.
Polok-Rubiniec, M.
Włodarczyk-Fligier, A.
Kania, A.
Powiązania:
https://bibliotekanauki.pl/articles/24200651.pdf
Data publikacji:
2023
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
materials
biomaterials
PLA
3D printing
FEM
materiały
biomateriały
druk 3D
MES
metoda elementów skończonych
Opis:
Purpose This study focuses on determining the best possible structure of the orthosis made with FDM 3D printing technology. To produce the samples, a thermoplastic PLA material was selected that met the conditions of biodegradability, biocompatibility and non-toxicity. The samples produced were subjected to a tensile strength test and corrosion resistance. Design/methodology/approach Studies based on FEM analysis were carried out using the advanced engineering software CAE - Inventor. The samples were designed in the CAD system, while the G-Code path was generated using the PrusaSlicer 2.5.0 program dedicated to the Prusa i3 MK3S+ printer, which was used to create the models. Surface morphology observations of PLA were carried out with a Zeiss SUPRA 35 scanning electron microscope (SEM). The static tensile test was performed on the Zwick/Roell z100 device based on the PN-EN ISO 527:1 standard. Electrochemical corrosion tests were carried out using the Autolab PGSTAT302N Multi BA potentiostat in Ringer solution at a temperature of 37ºC. Findings The research allowed the appropriate structure of the orthosis made of PLA polymer material using 3D FDM printing technology. The static tensile test, SEM and corrosion tests confirmed the correct application of this material for the selected purpose. It was possible to determine that samples with holes of 10 mm had the highest strength properties. Due to the tensile tests, the average tensile strength of those samples was around 61 MPa. The corrosion parameters of PLA were determined using Tafel analysis. Research limitations/implications The research methodology proposed in work can be used to study other biomedical materials. The results presented can be the basis for further tests in order to search for the best orthopaedic stabiliser. Originality/value The innovative part of the article are three different versions of structures intended for making orthoses used in medicine.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2023, 116, 2; 72--79
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and testing 3D printed structures for bone replacements
Autorzy:
Ikonomov, P. G.
Yahamed, A.
Fleming, P. D.
Pekarovicova, A.
Powiązania:
https://bibliotekanauki.pl/articles/367249.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
3D printing
bone structure
3D modelling
testing
mechanical properties
druk 3D
struktura kości
modelowanie 3D
badania
właściwości mechaniczne
Opis:
Purpose: 3D printing has shown enormous potential for building plastic products, including bone, organs, and body parts. The technology has progressed from visualization and preoperation training to the 3D printing of customized body parts and implants. This research aims to create 3D printed bone structure from plastics and test the mechanical properties of the cortical and trabecular bone structures if they match the real bone structure strength. Design/methodology/approach: We used Digital Imaging, and Communications in Medicine (DICOM) images from Computer Tomography (CT) scans to created external bone structures. These images' resolution did not allow the creation of fine trabecular bone structures, so we used 3D modeling software to engineer special 3D void honeycomb structures (with triangular, square, and hexagonal shapes). Another reason to design void structures is that the 3D printing of complex shapes without support materials is problematic. After designing and 3D printing of the 3D bone structures, their mechanical properties need to be tested. Findings: 3D bone models, solid (cortical), and void (trabecular) bone structures were designed, 3D printed, and then tested. Tensile, bending, and compression testing was performed. Testing the mechanical properties of the honeycomb structures (triangular, square, and hexagonal) shows that their strength and modulus are higher than those of the real trabecular bones. The results show that 3D printed honeycomb structures mechanical properties can match and some cases exceeding the properties of the actual bones trabecular structures, while the sold structures have lower mechanical properties than the bone cortical structures. Research limitations/implications: During the 3D printing experiments, we found that 3D printers, in general, have low resolution, not enough to print fine trabecular bone structures. To solve the existing 3D printing technology's insufficient resolution, we later designed and built an SLA (stereolithography) 3D printer with high printing resolution (10 micrometers). Another limitation we found is the lack of biocompatible materials for 3D printing of bone structures. Future research work is in progress formulating superior ink/resin for bone structures 3D printing. Further, clinical trials need to be performed to investigate 3D printed parts’ influence on the healing of bone structures. Practical implications: We found that the 3D void (honeycomb) structures will have an impact not only on building bone structures but also in engineering special structures for industrial applications that can reduce the weight, time, and the cost of the material, while still keep sufficient mechanical properties. Originality/value: Designing and testing 3D printed bone models, solid (cortical), and void (trabecular) bone structures could replace bones. Design and test special void honeycomb structures as a replacement for cortical bone structures.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2020, 101, 2; 76-85
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Thermoplastic polyurethanes for mining application processing by 3D printing
Autorzy:
Mrówka, M.
Szymiczek, M.
Lenża, J.
Powiązania:
https://bibliotekanauki.pl/articles/367236.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
thermoplastic polyurethane
3D printing
mechanical tests
aging
processing
poliuretan termoplastyczny
drukowanie 3D
badania mechaniczne
starzenie
przetwarzanie
Opis:
Purpose: Thermoplastic polyurethanes (TPU) found application in mining. Due to the excellent processing properties, thermoplastic polyurethanes can be also use to make elements that would facilitate miner's work. These elements, however, differ in dimensions depending on the person who is going to use them, that is why they should be personalized. In case of all the above studies, the elements or stuffs were made by means of the injection method. This method limits the possibility of producing mining’s stuff only to models that have a mould. The 3D printing technology developing rapidly throughout the recent years allows for high-precision, personalized elements’ printing, made of thermoplastic materials. Design/methodology/approach: The samples from thermoplastic polyurethanes were made using 3D printing and then subjected to the aging process at intervals of 2, 7 and 30 days. The samples were then subjected to a static tensile tests, hardness tests and FT-IR spectroscopy. Findings: The obtained results of mechanical tests and IR analyses show that the aging process in mine water does not affect the mechanical properties of the samples regardless of the aging time. IR spectral analysis showed no changes in the structure of the main and side polyurethane chains. Both mechanical and spectral tests prove that polyurethanes processed using 3D printing technology can be widely used in mining. Research limitations/implications: Only one type of TPU was processed in this work. Further work should show that synthetic mine water does not degrade the mechanical properties of other commercially available TPUs. Practical implications: The additive technology allows getting elements of mining clothing, ortheses, insoles or exoskeleton elements adapted to one miner. Originality/value: The conducted tests allowed to determine no deterioration of the mechanical properties of samples aged in synthetic mine water. TPU processing using 3D printing technology can be used in mining.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2019, 95, 1; 13-19
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Digitally designed casting ring and sprue system - a contemporary approach to the casting process in dentistry
Autorzy:
Penchev, P.
Powiązania:
https://bibliotekanauki.pl/articles/24200612.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
3D printing
digital sprue system
casting
denture pattern
dentistry
drukowanie 3D
cyfrowy system wlewowy
odlew
wzór protezy
stomatologia
Opis:
Purpose: The current paper aims to present a new casting approach in dentistry by eliminating some conventional preliminary procedures and digitalising the process as much as possible. Design/methodology/approach: The experiment uses six digital crown patterns. They are aligned with each other and to the wall of a virtual casting ring. Then a digital sprue system is created. The object alignment and sizes are revised, and the optimal correlation is set. Finally, a single virtual object is created and is 3D printed of light curing acrylic resin suitable for casting, invested, and cast. Findings: The castings that are achieved have good quality and no defects. At the same time, the virtual designing and aligning of the patterns and all the components of the sprue system and casting ring save much time and allows better precision to be achieved. All these facts allow better control of the casting process results, making the process faster, more predictable, and more accurate. Research limitations/implications: The limitations of this study concerns pattern selection. It is well-known that the acrylic resin sublimates and expands massively during a temperature rise, which may cause mould fracture. This obstacle is very representative as solid objects with higher volumes are examined. This may enforce alignment revision or even temperature rate modification. Practical implications: Suggested approach will be very useful for daily dental laboratory practice by optimizing the working time of the dental technician, making the denture production process faster, more predictable, and more accurate. As a result, the process optimizes the working process in dental offices, by allowing shortening the time of each visit and treatment plan terms. Originality/value: Presented approach reveals some new opportunities for dental technicians to substitute the conventional raw stages of sprue system fabrication with digital planning and designing. This allows dental technicians to take advantage of the full potential of digital technologies.
Źródło:
Archives of Materials Science and Engineering; 2022, 119, 1; 31--41
1897-2764
Pojawia się w:
Archives of Materials Science and Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Numerical analysis of mechanical properties of 3D printed aluminium components with variable core infill values
Autorzy:
Baras, P.
Sawicki, J.
Powiązania:
https://bibliotekanauki.pl/articles/1818813.pdf
Data publikacji:
2020
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
additive manufacturing
metal 3d printing
numerical simulation
infill configurations
FEM
finite element method
wytwarzanie przyrostowe
druk 3D
symulacja numeryczna
MES
metoda elementów skończonych
Opis:
Purpose: The purpose of this paper is to present numerical modelling results for 3D-printed aluminium components with different variable core infill values. Information published in this paper will guide engineers when designing the components with core infill regions. Design/methodology/approach: During this study 3 different core types (Gyroid, Schwarz P and Schwarz D) and different combinations of their parameters were examined numerically, using FEM by means of the software ANSYS Workbench 2019 R2. Influence of core type as well as its parameters on 3D printed components strength was studied. The “best” core type with the “best” combination of parameters was chosen. Findings: Results obtained from the numerical static compression tests distinctly showed that component strength is highly influenced by the type infill choice selected. Specifically, infill parameters and the coefficient (force reaction/volumetric percentage solid material) were investigated. Resulting total reaction force and percentage of solid material in the component were compared to the fully solid reference model. Research limitations/implications: Based on the Finite Element Analysis carried out in this work, it was found that results highlighted the optimal infill condition defined as the lowest amount of material theoretically used, whilst assuring sufficient mechanical strength. The best results were obtained by Schwarz D core type samples. Practical implications: In the case of the aviation or automotive industry, very high strength of manufactured elements along with a simultaneous reduction of their wight is extremely important. As the viability of additively manufactured parts continues to increase, traditionally manufactured components are continually being replaced with 3D-printed components. The parts produced by additive manufacturing do not have the solid core, they are rather filled with specific geometrical patterns. The reason of such operation is to save the material and, in this way, also weight. Originality/value: The conducted numerical analysis allowed to determine the most favourable parameters for optimal core infill configurations for aluminium 3D printed parts, taking into account the lowest amount of material theoretically used, whilst assuring sufficient mechanical strength.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2020, 103, 1; 16--24
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The digitisation for the immediate dental implantation of incisors with immediate individual prosthetic restoration
Autorzy:
Dobrzański, L. B.
Achtelik-Franczak, A.
Dobrzańska, J.
Dobrzański, L. A.
Powiązania:
https://bibliotekanauki.pl/articles/368724.pdf
Data publikacji:
2019
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
surgical guide
immediate implant prosthetic restoration
individual abutments
dental implant
3D printing
CNC milling
computed tomography with cone beam
uzupełnienie protetyczne
łącznik
implant stomatologiczny
druk 3D
frezowanie CNC
stożkowa tomografia komputerowa
Opis:
Purpose: The purpose of this study is to present the author's method of planning the procedure of immediate implant-prosthetic restoration in place of a tooth qualified for removal by performing a surgical template and implant-prosthetic restoration based on data obtained in the CBCT test and intraoral scanning 3D model. Design/methodology/approach: The method of planning the implant surgery through the design and manufacture of surgical templates and implant prostheses performed before the start of medical procedures was described on the basis of actual clinical data from patients with anterior segment teeth qualified for extraction for reasons of complications after endodontic treatment. The placement of the implant was planned using virtual reality, where the bone model and the virtual soft tissue model were combined, which made it possible to perform a surgical template and prosthetic implant restoration. For the manufacturing, 3D printing as stereolithography SLA and selective laser sintering SLS for the surgical template manufacturing and CNC milling in the case of the prosthetic implant were used for restoration. Findings: The method allows planning the implant position based on two connected bone and soft tissue models and allows to design and manufacture a surgical guide. In this way, it becomes possible to place implants in the patient's bone during surgery procedure in the planned position and to install the prosthetic implant restoration in the form of an individual abutment and a PMMA crown during the same procedure in the surgical part. Practical implications: Thanks to the method of computer-aided design/manufacturing CAD/CAM production of surgical templates and prosthetic restoration based only on digital models and the planned position of the implant, it is possible to carry out the procedure of immediate tooth extraction and replacement with permanent prosthetic restoration. The whole process is based on the CBCT test performed at the beginning. The presented method allows shortening the procedure time by four times and the rehabilitation time by 3-6 months when performing the procedure in a minimally invasive manner. Originality/value: This article presents the original design and production method of surgical guides. It allows for precise planning of the implant position and transfer of this data to the patient's mouth during the procedure, enabling permanent prosthetic restoration before starting medical procedures.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2019, 97, 2; 57-68
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study of the adhesion between TPU and PLA in multi-material 3D printing
Autorzy:
Brancewicz-Steinmetz, E.
Valverde Vergara, R.
Buzalski, V. H.
Sawicki, J.
Powiązania:
https://bibliotekanauki.pl/articles/2201075.pdf
Data publikacji:
2022
Wydawca:
Stowarzyszenie Komputerowej Nauki o Materiałach i Inżynierii Powierzchni w Gliwicach
Tematy:
multi-material printing
PLA
TPU
FDM
adhesion
druk wielomateriałowy
drukowanie 3D
tworzywo PLA
termoplastyczny poliuretan
technologia FDM
adhezja
Opis:
Purpose In the Fused Filament Fabrication (FFF/FDM) technology, the multi-material manufacturing additive method is achieved by a single nozzle or multiple nozzles working simultaneously with different materials. However, the adhesion between different materials at the boundary interface in FDM multi-material printing is a limiting factor. These studies are concerned with improving and study the adhesion between two polymers. Design/methodology/approach Due to the numerous applications and possibilities of 3D printed objects, combining different materials has become a subject of interest. PLA is an alternative to the use of petrochemical-based polymers. Thermoplastic Polyurethane is a flexible material that can achieve different characteristics when combined with a rigid filament, such as PLA. To improve the adhesion between PLA and TPU in multi-material FFF/FDM, we propose the comparison of different processes: post-processing with acetone immersion, surface activation during printing with Acetone, surface activation during printing with tetrahydrofuran, post-processing annealing, and connection of printed parts with tetrahydrofuran. Findings Modifying the 3D printing process improved the quality of the adhesive bond between the two different polymers. Activation of the surface with THF is the treatment method recommended by the authors due to the low impact on the deformation/degradation of the object. Research limitations/implications In the study, adhesion was considered in relation to the circular pattern of surface development. Further analysis should include other surface development patterns and changes in printing parameters, e.g. process temperatures and layer application speed. Practical implications 3D printing with multi-materials, such as PLA biopolymer and thermoplastic polyurethane, allows for the creation of flexible connections. The strengthening of the biopolymer broadens the possibilities of using polylactide. Examples of applications include: automotive (elements, where flexible TPU absorbs vibrations and protects PLA from cracking), medicine (prostheses with flexible elements ensuring mobility in the joints). Originality/value Multi-material printing is a new trend in 3D printing research, and this research is aimed at promoting the use and expanding the possibilities of using PLA biopolymer.
Źródło:
Journal of Achievements in Materials and Manufacturing Engineering; 2022, 115, 2; 49--56
1734-8412
Pojawia się w:
Journal of Achievements in Materials and Manufacturing Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-10 z 10

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