This diploma thesis describes the process of production of the cast by the lost-wax casting method. It includes the manufacturing of prototype models by additive technology, creation of ceramic shell molds. The work also includes an experimental part focused on the production of the selected parts by the method of the lost-wax casting and the comparison of this method with other types of production.

The diploma thesis deals with the production process of optical part of headlamp module produced by additive technology. The thesis contains the characteristics of headlamp, current manufacturing technology and description of additive manufacturng methods. The practical part is focused on the production of a reflector using 3D printing. The conclusion of the thesis is dedicated to the measuring of light output and its evaluation.

The thesis deals with the possible use of additive technology in the production of strong thermally exposed components of turbine engines. The first part of the thesis is dedicated to the issue of processing heat-resistant materials by SLM method, introduction of conventional production of selected part and outline of currently used progressive methods in precision casting technology. These theoretical findings are further applied in the practical part of the thesis, which deals with the analysis of mechanical properties of cast and printed material IN 939. Experimental part also includes production of the blisk of the first stage turbine of the auxiliary power unit S5L by SLM additive technology. The thesis also includes analysis of fracture surfaces and metallographic analysis of samples using light and scanning electron microscopy. The thesis ends with the evaluation of the achieved results.

The thesis deals with the design, construction and testing of two different metal powder coating equipment, which is able to work with SLM 280HL metal 3D printer. Since the field of multimaterial metal printing by selective laser melting (SLM) has not been significantly investigated yet, an overview of existing patents and possible approaches to the solution has been developed. The device has been successfully designed and a series of tests was carried out defining the issue of applying an improved head that uses a nozzle and an eccentric vibration motor. Based on the experiments performed, the coating parameters of the multimaterial layer of FeAm and 316L materials were defined. A control system for the partial process automation was created for the proposed device. The device was implemented in a printer that demonstrated both the ability to apply a single multimaterial layer of at least 50 m thickness, and the ability to produce a 3D multimaterial component comprised of up to 200 layers and containing material change across all axes.

The Master's thesis deals with the determination of mechanical properties of materials used for 3D printing by ALPS ELECTRIC CZECH, s.r.o. (PETG, PLA, ABS, PLA ESD), extended of new materials (ASA, PC / ABS). The prepared test samples, produced by 3D printing technology Fused Deposition Modeling, were analyzed using mechanical tests (tensile test and two hardness tests), surface roughness and dimensional accuracy. Statistical evaluation was performed for individual materials of selected parameters (tensile strength, modulus of elasticity in tension, elongation, Shore hardness, hardness of ball indentation). The conclusion of the thesis is devoted to the comparison of materials by selected parameters and production costs. The additive material PLA Filament Plasty Mladeč proved to be the best with its properties and the second lowest price.

This thesis deals with the analysis of mechanical properties of composite materials used for 3D printing by Markforged company. The theoretical part is focused on the characterization of composite materials and analysis of mechanical tests. The experimental part deals with the production of test specimens for specific mechanical tests (tensile test, Shore D hardness test and bending test). The test sapples with Onyx base material are individually reinforced with carbon and high-temperature glass fibers (HSHT). There are statistically evaluated selected parameters for individual mechanical tests (tensile strength, elongation, modulus of elasticity, Shore D hardness, bending stress and bending deformation). The thesisis completed by comparing selected parameters of composite materials with overall recommendations for users.

Sammanfattning Syfte Studiens syfte var att utvärdera bindningsstyrkan mellan protesbas och protestand beroende påframställningsteknik, med 3D-printning eller fräsning, och efter åldring. Material och metod Totalt framställdes 40 provkroppar varav 20 tillverkades genom 3D-printning (P) med SprintRay EU(SprintRay GmbH, Iserlohn, Tyskland) och 20 genom fräsning (F) med Ivotion (Ivoclar Vivadent AG,Schaan, Liechtenstein). Hälften av de frästa (TF) och 3D-printade provkropparna (TP), det vill säga10 av varje, utsattes för 5 000 termocykler i temperaturerna 5 och 55 °C (T) och förvarades idestillerat vatten i 48 timmar vid en temperatur på 37° C. Bindningsstyrkan mättes genom ettskjuvkrafttest enligt standardiserade metoder. Envägs-ANOVA och Tukey’s test användes för statistisk utvärdering av resultaten därsignifikansnivån sattes till α=0,05. En frakturanalys utfördes för att bedöma frakturtyper. Resultat Resultaten visade att P hade en signifikant högre bindningsstyrka än F (p<0,001). Skillnaden kvarstod även efter åldring. Det var ingen signifikant skillnad (p=0,626) i bindningsstyrkan mellan F och TF. TP uppvisade signifikant lägre bindningsstyrka jämfört med P (p=0,007). Alla F fick en adhesiv och kohesiv blandfraktur. P fick nio kohesiva och en adhesiv fraktur. TF fick sex adhesiva och fyra blandfrakturer. TP fick sju kohesiva och tre blandfrakturer. Slutsats 3D-printade material har en högre bindningsstyrka mellan protesbas och protestand jämfört med frästa. Åldring har en större negativ inverkan på bindningsstyrkan mellan protesbas och protestand om materialen är 3D-printade jämfört med om de är frästa. / Abstract Objective The aim of the study was to evaluate the bond strength between denture base and denture toothdepending on the manufacturing technique, fabricated through either 3D-printing or milling, and afterageing. Material and methods 40 specimens were produced, 20 were produced through 3D-printing (P) using SprintRay EU(SprintRay GmbH, Iserlohn, Genmany) and 20 through milling (F) using Ivotion (Ivoclar VivadentAG, Schaan, Liechtenstein). Half of the milled (TF) and printed specimens (TP), i.e., 10 of eachgroup, underwent 5 000 cycles of thermocycling and were stored in distilled water for 48 hours at acontrolled temperature of 37° C. Bond strength was evaluated using a shear bond strength test. One-way ANOVA and Tukey’s test were employed to assess the results with a significance level atα=0.05. Fracture analysis was conducted to evaluate the fracture type. Results The result showed that P had significantly higher bond strength compared to F (p <0.001). The difference remained after the ageing process. The comparison between F and TF yielded non-significant results (p=0.626). P had significantly higher bond strength than TP (p=0.007). All F had mixed fractures of adhesive and cohesive. P had nine cohesive and one adhesive fracture. TF had six adhesive fractures and the remaining were mixed fractures. TP had seven cohesive fractures and three mixed fractures. Conclusion 3D-printed materials have higher bond strength between the denture base and denture tooth compared to milled materials. Ageing has a greater negative impact on the bond strength between the denture base and denture tooth of printed materials compared to milled materials.

In the experimental part of this thesis there is an assessment of pressure bearing capacity of cylindrical nozzles printed using a 3D printer. In the theoretical part of this diploma thesis there are outlined the types of additive technologies focusing on the development of FDM printers, open designs and RepRap project. Descripti-on of the production process of 3D printing and application of additive technolo-gies in the field of HVAC. In the project part, the design of the forced ventilation of the Sports Hall is solved. The object is assessed in terms of heat losses and profits for priority rooms of functional units. Heat load coverage is carried out by air-conditioning equipment. In addition, a project is drawn up which contains all the text and drawings, including technical specifications and regulatory schemes.

The work is focused on introduction and brief description of CAM software PowerMill 2020 from a company named Autodesk. Furthermore, this thesis discusses the issue of CAD/CAM systems, especially additive manufacturing. Description, division, technology, materials and area of application of additive manufacturing including advantages and disadvantages are discussed. The work also includes the issue of hybrid manufacturing and introduces the most important companies operating in this area of production. The practical part of the thesis is mainly focused on outlining the machining process of own designed part in the PowerMILL2020.

This diploma thesis deals with the analysis and design optimization of a speaker cabinet (enclosure) produced by the additive technology of 3D sand printing. The introductory part is devoted to the theory, both in the field of noise, vibration and the method of their calculations, as well as the theory of speakers and their systems. Numerical and experimental modal analysis is performed, which were compared to determine the mechanical properties of the new material, including material damping. This is followed by experimental and numerical harmonic analysis, with output in the form of a numerical model describing the behaviour of the structure during its excitation. The data are compared with a modal analysis of the internal acoustic space and the critical shapes and their frequencies are determined. At the end of the work, construction modifications are proposed to increase the rigidity of enclosures, the influence of which is evaluated on the created numerical models.