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Influence of type of base sand on strength of geopolymer sand mixture
Kudr, Martin ; Šupálek, Milan (referee) ; Cupák, Petr (advisor)
The goal of this research is to find out the effect of different types of opening material on bending strength geopolymer’s moulding mixture. Four different silical opening material were used along with two types of binder. To solve the selected problem I have used the test of bending strength. At first I have prepared the moulding mixture and after its induration, I have tested the bending strength. The times were always the same 60, 120 and 1440 minutes. The highest level of bending strength was achieved at opening material SH-34 when using binder Geopol 618. The value of bending strength level was 0,881MPa. The results of this research could help the foundries during implementing technology of geopolymer moulding mixture, which would help particulary when looking for a proper opening material.
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Modern anorganic foundry binder systems
Lorenc, Michal ; Rusín, Karel (referee) ; Cupák, Petr (advisor)
Today, the problem caused by various kinds of activities is a great impact on the environment. This also applies for the foundry industry, which has a relatively large share of this pollution. For this reason, constantly evolving new binders, which do not have such an impact on the environment. The aim of this work is to become familiar with these types of binders that are more friendly to our already devastated the planet.
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Manufacturing of aluminium alloy castings in sand mould
Exner, Zbyněk ; Roučka, Jaromír (referee) ; Záděra, Antonín (advisor)
The thesis theoretically deals with research activities in the field of molding mixtures, description and division of aluminum alloys for castings. Furthermore, the thesis presents the process of production of the cylinder head of the internal combustion engine Jawa 50, from the design of a 3D model and its production by 3D printing to its casting from aluminum alloy EN AC-46000. Molds from bentonite, self-hardening and oil-bentonite molding mixtures were used to cast the test casting. To complement the experiment, the casting was also made using the lost-wax casting method. For the production of wax models, it was necessary to make a mother mold. Subsequently, two different ceramic shells were made. The first one was designed to cast only one casting, the second one, with a different orientation of the models to the inlet, allowing to cast two pieces of castings at once.
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Design and manufacture of Mjölnir hammer by casting
Bubník, Šimon ; Bořil, Petr (referee) ; Myška, Martin (advisor)
The aim of this bachelor's thesis was to design suitable technologies for the production of Thor's hammer casting within the BUT school foundries. The work contains a theoretical part, which summarizes the casting technology itself, focusing on the production of non-permanent molds, cores and molding compounds. Furthermore, the work contains a practical part, which describes the process of casting production from the creation of the model and its printing, the subsequent production of the mold to the finishing of the casting.
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Sands for the production of foundry moulds and cores
Ostrézí, Filip ; Rusín, Karel (referee) ; Cupák, Petr (advisor)
Bachelor thesis deals with properties of most usable sands in foundries and with their advantages, disadvantages and usability. Most used are silica sands, because of their low prices, but they have a lot of disadvantages like discontinued heat dilatation, acidit reaction and health defect. Mainly described are sands from Czech and Slovak Republic and few sands out of Europe. Non-silica sands don´t have so much disadvantages, but their problem is a big price. Most used non-silica and synthetic sands are described.
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Use of regenerated sand in molding mixtures
Henzlová, Michaela ; Žák, Štěpán (referee) ; Bořil, Petr (advisor)
The aim of the work is to verify the use of regenerated sand in molding mixtures within the school foundry at the Faculty of Mechanical Engineering of BUT in Brno. At the beginning of this thesis, a literature search is carried out on the given topic. As part of the experiment, suitable models and materials were first chosen for the production of samples. The models were molded with a molding mixture with new sand and a mixture with regenerated sand, some of them were also painted. After casting, the surface quality of individual samples was examined depending on the used molding mixture, material and coating. First, the surface was evaluated by a comparative method using standards, and then the tendency of the mixtures to bake was evaluated. At the end, all measurement results are compared.
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Design and manufacture of Mjölnir hammer by casting
Bubník, Šimon ; Bořil, Petr (referee) ; Myška, Martin (advisor)
The aim of this bachelor's thesis was to design suitable technologies for the production of Thor's hammer casting within the BUT school foundries. The work contains a theoretical part, which summarizes the casting technology itself, focusing on the production of non-permanent molds, cores and molding compounds. Furthermore, the work contains a practical part, which describes the process of casting production from the creation of the model and its printing, the subsequent production of the mold to the finishing of the casting.
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Manufacturing of aluminium alloy castings in sand mould
Exner, Zbyněk ; Roučka, Jaromír (referee) ; Záděra, Antonín (advisor)
The thesis theoretically deals with research activities in the field of molding mixtures, description and division of aluminum alloys for castings. Furthermore, the thesis presents the process of production of the cylinder head of the internal combustion engine Jawa 50, from the design of a 3D model and its production by 3D printing to its casting from aluminum alloy EN AC-46000. Molds from bentonite, self-hardening and oil-bentonite molding mixtures were used to cast the test casting. To complement the experiment, the casting was also made using the lost-wax casting method. For the production of wax models, it was necessary to make a mother mold. Subsequently, two different ceramic shells were made. The first one was designed to cast only one casting, the second one, with a different orientation of the models to the inlet, allowing to cast two pieces of castings at once.
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|
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Sands for the production of foundry moulds and cores
Ostrézí, Filip ; Rusín, Karel (referee) ; Cupák, Petr (advisor)
Bachelor thesis deals with properties of most usable sands in foundries and with their advantages, disadvantages and usability. Most used are silica sands, because of their low prices, but they have a lot of disadvantages like discontinued heat dilatation, acidit reaction and health defect. Mainly described are sands from Czech and Slovak Republic and few sands out of Europe. Non-silica sands don´t have so much disadvantages, but their problem is a big price. Most used non-silica and synthetic sands are described.
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