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Silicone molds and their use
Rudolf, Jiří ; Zouhar, Jan (referee) ; Jaroš, Aleš (advisor)
Bachelor thesis is focused on the design and production of a headphone holder. Thesis is divided into theorethical and practical part. The theoretical part is described Rapid Prototyping technology, precision casting with use of silicone molds and precision investment casting. The practical part is focused on the design of a headphone holder in CAD system Autodesk Inventor and following production via two different methods. The first way is 3D printing by Fused Deposition Modeling method and the second way is casting wax and plastic models using a silicone rubber mold. Conclusion of this thesis contains technical-economic evaluation and comparison of both manufacturing methods.
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Use of Numerical Simulation to Optimize Wax Patterns Production
Kosour, Vojtěch ; Elbel, Tomáš (referee) ; Nová, Iva (referee) ; Horáček, Milan (advisor)
Production of wax pattern model by injection machine is a one of the key phases of Investment casting process. The thesis deals with the development of numerical simulation wax blend injection in to metal die. The possibilities of selection simulation software – ProCast and Cadmould are described in the relation to numerical predictions of wax injection. Creating of material database of selected wax blends is described. The prototype simulations of die filling are made. The special testing die are designed a used for created simulations. The measurements of initial conditions are mentioned.
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Optimizing the ceramic tree mould taking into account the robotic shelling system
Petřík, Michal ; Šmatelka, František (referee) ; Horáček, Milan (advisor)
This diploma thesis deals with the optimization of the design pattern assembly for robot shell making system. Six types of castings were selected for optimization in regard to increase the utilization of liquid metal. The individual castings are described in the chapters and in the subchapters are described the original design pattern assembly intended for manual shell making, the designed pattern assembly shell making system with subsequent evaluation for the use of molten metal yield. The following chapters described the benefits of changing the pattern assembly design, the defects caused by this change and recommendations that should rule out the possible occurrence of these defects. The last chapter deals with a modified plate weight test, which was created directly for the conditions of the company Alucast s.r.o., where the practical part was solved.
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Optimizing the ceramic tree mould taking into account the robotic shelling system
Petřík, Michal ; Šmatelka, František (referee) ; Horáček, Milan (advisor)
This diploma thesis deals with the optimization of the design pattern assembly for robot shell making system. Six types of castings were selected for optimization in regard to increase the utilization of liquid metal. The individual castings are described in the chapters and in the subchapters are described the original design pattern assembly intended for manual shell making, the designed pattern assembly shell making system with subsequent evaluation for the use of molten metal yield. The following chapters described the benefits of changing the pattern assembly design, the defects caused by this change and recommendations that should rule out the possible occurrence of these defects. The last chapter deals with a modified plate weight test, which was created directly for the conditions of the company Alucast s.r.o., where the practical part was solved.
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On the cutting of cast superalloys
Metelková, Jitka ; Sliwková, Petra (referee) ; Píška, Miroslav (advisor)
This work deals with the issue of defects generation during the separation of the castings from a nickel-based superalloy, Inconel 738LC. The technology of investment casting is presented, followed by a description of metallurgy of superalloys, their physical and mechanical properties, as well as their technical applications. The machinability of superalloys and method of castings separation were also described as well as some of the casting defects that were reported to have impact on the generation of the defects after cutting. In the experimental part, the material microstructure and casting defects were analyzed. The experimental machining part consisted first of a comparative study of the friction sawing and plasma arc cutting technology at the standard operating conditions actually used in production. Second, an optimization study for the friction sawing was carried out, with a special focus on the suitability of an alternative cutoff wheel for the chosen application. Application of this wheel allows reducing the security distance between the cut and the part, thus reducing the production cost of the part.
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Silicone molds and their use
Rudolf, Jiří ; Zouhar, Jan (referee) ; Jaroš, Aleš (advisor)
Bachelor thesis is focused on the design and production of a headphone holder. Thesis is divided into theorethical and practical part. The theoretical part is described Rapid Prototyping technology, precision casting with use of silicone molds and precision investment casting. The practical part is focused on the design of a headphone holder in CAD system Autodesk Inventor and following production via two different methods. The first way is 3D printing by Fused Deposition Modeling method and the second way is casting wax and plastic models using a silicone rubber mold. Conclusion of this thesis contains technical-economic evaluation and comparison of both manufacturing methods.
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