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Modern trends of using ceramic cores for aerospace and IGT sector
Karafa, Pavel ; Láník, Boris (referee) ; Tomek, Ladislav (advisor)
The bachelor thesis deals with the manufacturing process and applications of ceramic cores for use in investment casting foundries. These ceramic cores find use extensively in the aerospace and energy industries for the production of turbine blades, or sometimes to create cavities in castings, which can’t be created by other methods. A separate task of ceramic cores described in the work is to create cooling cavities inside the body of the blade to improve the working process of the turbine. Work on the introduction briefly describes the casting using the lost wax method, which the turbine blades are produced, then the materials, separate process for producing ceramic cores, removing them from casting and default application of kernels.
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Production of real component by lost wax casting technology
Remeš, David ; Kolář, Ladislav (referee) ; Jaroš, Aleš (advisor)
This thesis deals with the real production of component by using investment casting technology. The thesis describes characteristics of investment casting technology, subsequently construction of 3D component, production of silicone mould, production of wax (plastic) of the model component. At the end of the work is provided technical and economic evaluation.
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Making of movie figurine replica
Petřík, Michal ; Myška, Martin (referee) ; Janský, Vojtěch (advisor)
This thesis is focused on an overview of artistic casting in a form of chronological order of individual epochs in the mankind’s arts, in which artistic casting had occurred. Furthermore, a brief overview of materials used the most in artistic casting is added to this thesis. Practical part of this thesis is dedicated to various ways of production of a movie figurine replica based on a copy of children’s toy.
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Optimization of wax pattern technology in the company Alucast
Šmatelka, Jakub ; Cileček, Jarmil (referee) ; Horáček, Milan (advisor)
This diploma thesis deals with the problem of wax patterns manufacturing in investment casting technology (lost wax process). This technology is very sensitive to the exact execution in each phase of the whole process, from concept design up to the final casting expedition. During most operations, dimensional changes occur, which is affecting the accuracy of the final casting. No matter how big these changes are, but especially if they occur with the least variance. One of the first phases in this technology is making wax patterns. There are several ways of making the wax patterns and this thesis is describing two different methods used in the Alucast foundry. One is based on using “soft waxes” enabling using low pressure machines, the other one on the “hard waxes” where the injection machine with higher presses is being used (SOM). These two above mentioned technologies are compared in this work.
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Optimized manufacturing of aluminium castings by using lost wax technology
Talanda, Ivan ; Horenský, Jiří (referee) ; Horáček, Milan (advisor)
Aim of this diploma thesis is to choose new pattern wax for Fimes a.s. foundry. New wax should substitute old not fully satisfactory pattern wax which caused problems in technological process resulting in increased number of rejects. New pattern wax should eliminate current problems and help foundry with producing large, thin-walled, high-quality castings. Numbers of pattern waxes supplied by world’s leading wax manufacturers were subjected to laboratory tests and pilot study. This diploma thesis is part of project Alfa TA01010766: „Research and development of production technology large, thin and high quality castings of aluminium alloys “
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Investment casting waxes and measurements of their properties with regard to simulation software
Bochníček, Štěpán ; Mikulka, Vít (referee) ; Kosour, Vojtěch (advisor)
Today, the use of simulations is increasing in order to reduce cost and complexity of production and also to prevent product defects. For this purpose, we use simulation programs, such as ProCAST. This program is designed for simulation of casting parts. In my bachelor thesis I focused on the methods of casting lost wax, where the model is made of wax mixture. In each simulation we have to obtain and specify the properties of the material to casting. I described these properties and methods of measurement in this bachelor thesis.
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Optimization of gating systems (their yield) in Al castings made by investment casting technology
Žižka, Jiří ; Šmatelka, František (referee) ; Horáček, Milan (advisor)
This diploma thesis deals with the optimization of gating systems of shape-complex aluminum castings produced by investment casting process. Two castings whose massive gating systems make problem with the use of liquid metal (so called yield) were chosen for optimization. Each casting is described in its own chapter. The individual subchapters deal with description of the original and newly designed gating system. Simulation, test castings, X-ray inspection and metallographic examination were performed for each variant. At the end of each chapter there is an evaluation of the results of the optimization of gating system.
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Investment casting – progressive foundry technology
Blažík, Petr ; Macků, Martin (referee) ; Mikulka, Vít (advisor)
The goal of this bachelor thesis is to bring special retrieval about possibilities of investment casting technology used for casting dimensional accurate products from aluminum alloys together with lost-wax process. The thesis deals with problems of the dimensional accuracy and the surface quality of casts produced by this technology. Further a thesis is focused on possibilities of increasing mechanical properties by the modification of casting procedure. At the end a thesis describes special technologies used for casting dimensional accurate aluminum alloys products used in aerospace industry, their principle and reachable mechanical properties.
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