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Setting of the material profile of stereolithographic 3D printing with a focus on dimensional accuracy
Topinka, Lukáš ; Koutecký, Tomáš (referee) ; Zatočilová, Aneta (advisor)
Additive technology of stereolithography works on the principle of curing a photosensitive polymer by laser or by DLP projector. Dimensional accuracy and quality of printing are affected by various parameters, such as exposure time and layer thickness. This bachelor thesis is focused on the description of the basic principles of stereolithography, including construction solutions for printers and their influence on the quality of printing. Furthermore, this thesis identifies the main parameters affecting the accuracy and suggests experiments for testing the influence of these parameters. At the end of this thesis, there is a description of the performed experiments, followed by a conclusion and suggestions for further development of this technology.
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Use of 3D printing in the Czech Republic
Kopecký, Miroslav ; Varhaník, Matúš (referee) ; Sedlák, Josef (advisor)
3D printing is a widely recognized and well established technique that enables the fabrication of complex structures with low production cost and easy scalability. In this study was conducted a comprehensive review of the applications of 3D printing in various industries in the Czech Republic. The first part of the research provides a summary of the different 3D printing techniques available, along with a comparison of relevant printing parameters and acquisition costs. The next part continues with description of the practical applications of the explained 3D printing methods in the Czech Republic industires. Namely, the applications in construction, automotive, education, and healthcare industries are discussed in more detail. The latter one is then brought into focus in the practical part of this work, where a medical aid is fabricated. Specifically the Fused Filament Fabrication (FFF) and Stereolithography (SLA) printing methods are used to fabricate a balance plates for lower limb proprioception training as a cost- effective alternative to commercially available product. Through a comparison of physical measurements, was found that the FFF method yielded more precise printouts. This research highlights the potential of 3D printing in delivering tailored medical aids, offering a promising avenue for future development.
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Design of DLP/SLA 3D Printer
Drcmánek, Filip ; Křenek, Ladislav (referee) ; Sládek, Josef (advisor)
This bachelor thesis is dedicated to the design of a DLP 3D printer. The main objective of the thesis is to design a DLP 3D printer that is going to emphasize safety, ergonomics, and user-friendliness. The design is based on the conducted analyses, thanks to which were discovered possible shortcomings of existing DLP 3D printers. These shortcomings create room for innovations, which have been made mainly in sub-elements of the design. Part of the final design includes elements that will simplify the handling of finished prints and increase safety when handling the device. The design also respects ergonomic requirements and the dimensions of the human body. The designed product can find application in the production of prototypes, in dentistry, jewellery and last but not least for hobby users.
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Design of compact MSLA 3D printer
Korábová, Anežka ; Křenek, Ladislav (referee) ; Haltof, Vladimír (advisor)
This bachelor thesis deals with design of compact MSLA 3D printer. Main goal of this thesis is to design MSLA 3D printer with emphasis on print quality and minimal easy maintenance. Design is based on gained knowledge from analyse of current products and their technology. Design takes account of the ergonomic aspects and brings new constructional solutions of inner components. The application of the product is not only for designers and modelers, but also for handymen and 3D print enthusiasts.
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Optimization of 3D printing and post-processing of advanced ceramics based on calcium phosphate
Valenová, Ludmila ; Hadraba, Hynek (referee) ; Drdlík, Daniel (advisor)
The diploma thesis is related to the preparation of hydroxyapatite complex structures by additive manufacturing known as Lithography based ceramics manufacturing – LCM. A photosensitive suspension containing hydroxyapatite particles was used for 3D printing of ceramic complex structures. The influence of printing parameters on the resulting macrostructure, microstructure, density, and dimensional accuracy was evaluated. The aim was to obtain ceramic components without delamination of the layers and optimise following post-processing steps (cleaning and thermal treatment). It was found that the exposure time has a significant effect on the dimensional accuracy of printed parts. During observation microstructure of printed parts, a microporosity at the interface of printed layers, which can cause delamination of several layers was identified. High-temperature dilatometry showed different temperature of beginning densification process in the longitudinal and perpendicular directions to the layers. That could be an initiation mechanism for delamination of the layers. X-ray diffraction analysis determined a single-phase composition of powder in photosensitive suspension and sintered parts. A commercial product LithaSol 20 was suggested as a suitable cleaning agent and efficiency of the ultrasound field for cleaning was demonstrated. Based on the thermogravimetric analysis an optimized cycle of heat treatment was designed. The optimisation led to time saving (49 hours), while maintaining density, dimensional accuracy and macrostructure of the 3D printed structures.
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Stereolithographic printer for producing a cell culture device
Gricová, Monika ; Vacula, Daniel (referee) ; Dostál, Zbyněk (advisor)
Stereolithography printing is one of the most popular 3D printing technologies. This printers use a UV light source for photopolymer curing and can be used for a wide range of applications with high precision and excellent print quality. Commercially available printers do not allow the modifications of the optical and mechanical parameters of the instrument. For this reason, a DLP printer has been designed to allow the optical system modifications and thus changing the printing field and resolution. Another advantage is the possibility to modify already designed mechanical parts. The DLP printer has been designed and tested. The recommended printer parameters settings are listed, which are based on the performed experiments.
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Design of 3D Printer
Chrástek, Jan ; Chorý, Tomáš (referee) ; Křenek, Ladislav (advisor)
Diploma thesis is focused on design of stereolithography 3D printer, which includes new technology and innovations to achive larger workspace and easy and comfortable manipulation. Great part of thesis is focused on shaping and aesthetic effect with respect of functional, safety, ergonomic and technical claims.
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Setting of the material profile of stereolithographic 3D printing with a focus on dimensional accuracy
Topinka, Lukáš ; Koutecký, Tomáš (referee) ; Zatočilová, Aneta (advisor)
Additive technology of stereolithography works on the principle of curing a photosensitive polymer by laser or by DLP projector. Dimensional accuracy and quality of printing are affected by various parameters, such as exposure time and layer thickness. This bachelor thesis is focused on the description of the basic principles of stereolithography, including construction solutions for printers and their influence on the quality of printing. Furthermore, this thesis identifies the main parameters affecting the accuracy and suggests experiments for testing the influence of these parameters. At the end of this thesis, there is a description of the performed experiments, followed by a conclusion and suggestions for further development of this technology.
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The influence of the parameters of stereolithographic 3D printing on the printing time
Kůst, Martin ; Škaroupka, David (referee) ; Zatočilová, Aneta (advisor)
This paper deals with stereolithographic 3D printing (SLA). It describes both upper and lower lighting design and shows the differences between laser light and DLP (Digital Light Processing) projector. Another part is to find the dependence between the time of exposure and the thickness of the layer also known as material profile on the DETAX, gray. So another work and further experiments can be done using this material. These experiments are performed on Way2production's SolFlex650 SLA printer. For ease of use with this printer, parameters affecting print time have been identified and a model is then found to calculate the total print time.
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Development of process parameters for the stereolithography
Vítek, Jan ; Škaroupka, David (referee) ; Paloušek, David (advisor)
This bachelor thesis deals with the search for optimal process parameters to reach a high strength of the Detax Solflex model material, with the DLP (digital light processing) 3D Solflex 650 printer. In the first part of this thesis the principle of printing using a laser and using a DLP projector and their comparison are presented. Further information about materials and impact of the process parameters on a printing are discussed. Based on a knowledge two assumptions were set: influence of exposure time and influence of layer thickness on strength. Firstly, samples were tested by the hardness Shore D test and the results from the test were compared. New samples for the stress test with the optimal set of parameters given by the previous test were printed and tested. Process parameters influence on strength was determined from the achieved results.
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