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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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Creating a 3D model and its realization on a 3D printer
LIŠKOVÁ, Markéta
The aim of this bachelor work is the creation of a 3D model and its realization. As the product of the 3D printing demonstration is chosen a bike bag for money and keys, which is placed under a seat on a seatpost. The theoretical part of the bachelor work presents a brief history about 3D printing, 3D printing technologies, editors for creating models and basic materials. The model is designed in an online editor TinkerCad. The printing is done by Fused Deposition Modeling (FDM) technology on the Original Prusa i3 MK3 printer. A part of the work is a simple handbook, which describes on a trolley coin with the JCU logo, how to create your own model and how to print it on the FDM printer.
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The thermal conductivity of non-standard materials for HVAC
Běťák, Karel ; Rubinová, Olga (referee) ; Uher, Pavel (advisor)
The thesis is focused on the determination of the thermal conductivity coefficient on the group of thermoplastics used for 3D printing (PLA, ABS, PETG). The thesis describes the materials used for 3D printing and the design of air conditioning for the grocery store. A stationary method was used for the solution. The heat flux passing through the sample was measured and the thermal conductivity coefficient was calculated. By the chosen method, we determined the coefficient is = 0,11-0,13 W/(m·K). Comparison with the available results of other methods and authors has shown that the resulting coefficient is lower. Based on the data, it is possible to compare the thermal properties of 3D printing materials.
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