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On the modern surface treatment of pressure casting dies
Černý, Štěpán ; Sliwková, Petra (referee) ; Píška, Miroslav (advisor)
Bachelor thesis is focused on the influence of surface treatments due to prolonging life and decreasing an amount of service hours on the die casting molds of aluminium alloys. Theoretical analysis of the problem deals with the requirements for tools materials used for making these moulds. Furthermore it deals with the materials which are most commonly used in their production and the species of aluminium alloys which are most commonly casted. The second part of this thesis, which is discussed in detail, deals with design solution regarding to usage of surface finishes on the moulds for die casting and their specific properties. Another part of this thesis contains experimental tests where was measured selected coating in order to determine its behaviour during the casting cycles with a focus on increasing lifetime of the mould insert, also reducing the amount of glued metal on the walls and finally improving the surface of casted part. It was found, according the analysis results, that the TiAlN coating helped to reduce the amount of glued metal on the mould walls. This also helped to reduce the amount of service intervals. On the other side for achieving much better results is better to use TiB2 coating. It has been experimentally confirmed that the TiAlN coating is not suitable for using in die casting moulds of aluminium alloys.
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Comparison of options in production of injection molds
Marko, Tibor ; Sliwková, Petra (referee) ; Kandus, Bohumil (advisor)
The project elaborated in frame of engineering studies branch engineering technology (2303R002) by comparing different methods of injection molding tool manufacturing. Set manufacturing method for each one of three selected plastic parts, particularly focused on cavity and core manufacturing. Various technological methods of manufacturing, material removal and forming plastic parts will be used for each cavity and core. Production research and economical evaluation will be developed based on given production processes and technology, which will determined which technology to use to pay off in economic terms, depending on the complexity of the plastic part.
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The design and technology of a mold production for the precision casting
Kopcík, Daniel ; Humár, Anton (referee) ; Píška, Miroslav (advisor)
The theoretical part of this bachelor´s thesis describes basic attributes of the lost wax casting method. The aforementioned section describes casting stages from component assignment to model casting, with the main concern of making wax model moulds, materials employed for moulding mixtures and casting accuracy achieved by precise casting. The experimental part begins with mould design for two components set by a customer, continues with focusing on design of casting and wax model mould. This is followed with creation of the CNC machine control program as well as choice of the moulding mixture and finally description of such casting. The experimental section is concluded by brief description of casting test and evaluation of the quality and accuracy of cast parts.
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Plastic materials and their treatment
Kopečný, Aleš ; Zemčík, Oskar (referee) ; Osička, Karel (advisor)
This research the basic empirical knowledge about the processing of plastic materials. The following are analyzes of the nature of plastic materials and analysis of the use of these materials in the engineering industry. This paper deals with the technological methods of processing plastics. Specifically, it is done as a summary of information about the technologies needed for the production of molds for plastics. Key words
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Solution production of a component to mould
Veselý, Vladimír ; Jaroš, Aleš (referee) ; Kalivoda, Milan (advisor)
This thesis describes creation of a packaging component made of ABS-TPU material. It is being made by vacuum shaping technology on a negative form. Bosch Diesel s.r.o. Jihlava company is introduced in the first part and a brief summary of the most commonly used packagings follows. The next part shows the very first draft of packaging shape and also how customers and the manufacturer implement some final changes. Next part describes the process of making a form and the packaging fabric. Finally there is aneconomical evaluation in the last part.
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Drawing of children of basic school in depend on a type of education.
TUPÁ, Adéla
This thesis focuses on drawing expression levels compared two groups of children younger school age, with the first group is an elementary school education at the school and the other practical. The theoretical part provides general information on the development of younger school age. It focuses on the development of drawing display in connection with the development of intellectual assumptions. The practical section provides the results of research of children's drawings which are assessed in relation to the developmental level of children.
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The theory of common nature of Thomas Aqvinas in the treatise De ente et essentia
BUZKOVÁ, Markéta
The work deals with theory of common nature and universals of Aquinas in the treatise De ente et essentia. In first part is defined conceptual foundation based on Aristotelian and Avicennian concepts of essence and existence. Avicenna defines two ways how can be essence considered. First it is absolute consideration of the essence and second the essence considered as it has being. Thomas Aquinas develops his notion of essence in a quite noticeable Avicennian framework. In the second part are presented the theory of common nature by St. Thomas. The theory is based on the essence considered as it has being, we can found it in rational soul.
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