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3D model Wanklova rotačního motoru pro výuku technických předmětů
BAŠTÝŘ, Jan
The bachelor thesis deals with the technique of 3D printing and materials suitable for its printing is currently widespread. The theoretical part of the work is focused on the history of 3D printers, a description of selected 3D printers and their comparison, and finally contains an overview of selected materials suitable for use in printing 3D models. The practical part deals with the use of 3D printing for the needs of teaching technical subjects. Within this work, a scale model of Wankel's engine is created for use in teaching.
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Zjišťování pevnostních charakteristik výrobků u 3D tisku
ČECH, Jan
This work inquires into the 3D printing by means of FMD technology. There are compared PLA and Pet-G materials. Further, the horizontal and the vertical printing positions are compared. The results are influenced by the height of the layer as well. There are tested higher layer of 0.25mm and lower layer of 0.15mm. The results are acquired by tensile test.
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A device for welding 3D printing filament
Roden, Lukáš ; Škaroupka, David (referee) ; Krčma, Martin (advisor)
This bachelor’s thesis deals with filament welding in 3D printers. During the print, there is often an extra part of the filament, that can be no longer used due to its small length. In this thesis I deal with the equipment construction for connecting these remnants of the cord or even longer pieces. In the first part is a search which deals with types of 3D printers, material of filaments and the issue of the welding process. In the second part, the acquired knowledge is used to create your own device design. More precisely, the analysis of the usability of individual materials and construction designs. In the last part I deal with a specific form solution of individual components.
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Filament recycler for FDM 3D printers
Neuwirth, Karel ; Bayer, Robert (referee) ; Jaššo, Kamil (advisor)
The first part of the project is focused on various types of 3D printing technology, especially FDM technology, where is possibility of recycling printed material. Next is a description of the most used materials for printing by FMD technology and a description of the production of filament using screw extruders. Several devices were selected for recycling and production of filament from FDM printing, for which their technological procedure in recycling is described. Subsequently, the work deals with the design of a device for melting plastic using a screw extruding device, including the possibility of measuring and regulating the output. In the last part, according to the design, the device is assembled and tested.
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3D printing large plastic stand
Sklenář, Michal ; Sedlák, Josef (referee) ; Kalivoda, Milan (advisor)
The bachelor thesis deals with the design and subsequent production of a large plastic stand on a 3D printer. The goal of the bachelor thesis is to divide the production process of the stand so that it can be realized it on a 3D printer workspace. Subsequently, there is an effort to save as much material as possible, but to ensure the full functionality of the stand as well. The topic of the thesis also shows defects and errors that are connected to the process of production and tries to outline their possible solutions. In conclusion, the financial side of production is evaluated, and the properties of the designed stand are compared with stands that are mass-produced. The whole set and design of the stand are conceived for the band "Zoo". The design of the stand is therefore set to produce only one piece.
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Filament mixer with variable contribution of input materials for FDM 3D printers
Hráček, Michal ; Jaššo, Kamil (referee) ; Bayer, Robert (advisor)
This bachelor thesis deals with the theory of 3D printing and 3D printers and the possibility of mixing two filaments. The work is focused especially on extruder, which is one of the main parts of 3D printer, but also on mounting and cooling the print head. In the extruder, the filament is fed and subsequently melted. Furthermore, the work mentions the problems of stepper motors, describes the used components for the practical part of the work and implementation of the entire device from PCB design, writing FW, to design mechanical parts.
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Testing of selected material properties for 3D printing
Čáslavský, František ; Mačák, Martin (referee) ; Vyroubal, Petr (advisor)
This thesis deals with 3D printing, materials used for 3D printing, testing of the materials and learning their real parameters. Goal of the thesis is comparing selected materials, executing series of mechanical test and selecting suitable material for printing high-quality plastic parts for use in automobiles, especially for reproduction of parts that are no longer made for oldtimers and for use in motorsport.
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Experimental comparison of recycled and non-recycled filament of ABS plastic
Grygar, Filip ; Krčma, Martin (referee) ; Koutecký, Tomáš (advisor)
Plastic waste which arises from 3D print could be recycled. One of the most used materials is ABS with which this degree work deals. During recycling of ABS mechanical qualities rapidly deteriorate which is compensated by adding non-recycled ABS. This degree work dealt with a ratio of 25% of recycled to 75% of non-recycled material which is a ratio not have been tested so far, and most likely represents a boundary ratio when recycling still makes sense. Unfortunately, it was not possible to extrude from a recycled material a filament of high-quality enough which could be used for problem-free print. It was influenced by non-homogeneity of crushed components and the construction of an extruder. For improving the characteristics a more complex extruder would be needed, with a bigger screw diameter or with two screws, and also a cooling system with more zones. Professional grinders with screens would have to be used for improving homogeneity of the material. The melt flow index of the liquid alloy and the testing of the filament itself showed that this way is practicable and such a recycling is realistic.
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Experimental comparison of filament produced from recycled and regular PET
Tomčová, Renata ; Vaverka, Ondřej (referee) ; Koutecký, Tomáš (advisor)
This bachelor thesis deals with the experimental comparison of filament made from recycled and common PET. Filament was made from commercial granulate of PET, PET-G and from recycled PET bottles. Sample pieces were printed using FDM technology from these filaments and then the sample pieces were tested using a tensile test. The sample pieces made from recycled PET filament had one third worse tensile strength than the sample pieces made from common PET and PET-G filaments. Thanks to this bachelor thesis it is possible to decide, if it is worthy producing filament from recycled PET bottles even at the cost of reducing the mechanical properties of final products.
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