|
|
Influence of Cyclone process parameters on the quality of ceramic shells
Lederer, Vojtěch ; Šustek, Petr (referee) ; Krutiš, Vladimír (advisor)
Diploma thesis contains introduction into shell drying, its monitoring and influence on shell properties. The thesis works with the Cyclone machine described further. The shell drying process in the machine and experiments are carried out broadening understanding of functions and parameters of rapid drying process. Experiments comparing courses of drying under respective settings of Cyclone and under common drying in air-conditioned room are carried out. Also mechanical properties of commonly dried shells and shells made by the Cyclone machines are compared. The positive effect of the machine on the ultimate strenght of dried shells and positive effect on the drying speed has been confirmed.
|
|
|
Optimized ceramic shell for manufacturing of aluminium castings by using lost wax technology
Mazůrek, Tomáš ; Vašťák, Patrik (referee) ; Horáček, Milan (advisor)
This diploma thesis deals with the possibilities of optimization of ceramic shell molds in the method of investment casting. In the first part is mentioned a complete technological process of the method with focusing on production and quality control of the ceramic shell and components, from which it is produced. The experimental part is divided into two parts, in the first are results of laboratory tests, which were tested both the current ceramic shell and shells which have been considered as a possible replacement. In the second section were verified conclusions of the experimental findings and recommendations of the laboratory results in pilot plant conditions.
|
|
| |
|
|
Optimization of wax and ceramic shell technologies in the company Fimes
Kolesár, Roman ; Vašťák, Patrik (referee) ; Horáček, Milan (advisor)
The thesis continue thematically in the previous development of the wax mixtures for the company Fimes. The general description of the investment casting process from the production of the die to casting of the wax pattern is handled in the first part. It is followed by the summary of the previously carried out experiments on cracking the shells. The experimental part describes the individual operations from the production of tested wax patterns to casting in the Boilercláv. The newly developed wax mixture is compared to the wax mixture used by the company Fimes. The experiments focus on the possibility of cracking the shells during the casting process and the dimensional stability of wax mixtures.
|
|
|
Influence of raw materials to the final quality of aluminium investment castings
Macko, Martin ; Vašťák, Patrik (referee) ; Horáček, Milan (advisor)
The purpose of this thesis is to assess the current state of production of ceramic shells in MESIT Foundry, a.s. and optimize it. The shells are evaluated in terms of their bending strength, gas permeability and microstructure. Subsequently, castings produced using the shells are evaluated with regard to number of non-conforming products and presence of defects. The final part seeks to compare different shells and outlines a possible new approach to the development of ceramic shells.
|
|
| |
|
|
Present state of investment casting technology
Bártů, Zbyněk ; Horenský, Jiří (referee) ; Horáček, Milan (advisor)
.The bachelor’s thesis is focused on the most modern and latest trends used in investment casting technology. The aim of this bachelor thesis is literary research on the most modern equipment that used wax pattern manufacture, ceramic shell manufacture, de-waxing, metal pouring and finishing operation. The first part describes the history and development of the investment casting technology. The following chapters disclose a general procedure for the production of the investment casting technology and equipment suitable for its manufacture.
|
|
|
Present state of investment casting technology
Soukupová, Lucie ; Šmíd, Dušan (referee) ; Horáček, Milan (advisor)
The Bachelor’s thesis deals with the latest trends in investment casting technology, from wax pattern manufacture, ceramic shell manufacture, de-waxing, shell heat treatment up to metal pouring and finishing operation. In the first part, the outline of the world production and the usage of investment castings nowadays are introduced. The other parts of the project include the basic technique of using new technologies. The aim of this work is developing a literature search focused on the most modern equipment and raw materials that are used in investment casting technology and testing of wax mixtures and ceramic slurries.
|
|
| |
|
|
Investment casting technology - overview of cast materials
Ostratický, Marek ; Mikulka, Vít (referee) ; Soukupová, Lucie (advisor)
The bachelor´s thesis deals with investment casting technology and overview of cast materials. In fist section deals with production. From the wax model, applying and curing the shell up to the actual casting and finishing operations. The second part is often drawn up a general overview of cast materials, which includes ferrous and non-ferrous metals. The aim is to develop research describing investment casting method with a general overview of cast materials. A summary of their properties and their use in practice.
|
guest ::
