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Engineering plastics for specific applications
Vrátný, Martin ; Kebrle, Ondřej (referee) ; Kandus, Bohumil (advisor)
This bachelor’s thesis is focused on heat resistance and chemical resistance of plastics. The first part deals with properties and usage of selected plastics. The second part includes description of heat resistance and chemical resistance. Selected plastics are compared in table by their resistance. In conclusion the plastics are compared by detected data and suitability of plastics in environment with higher temperatures and aggresive chemical impacts.
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Design and realization of extrusion head and connecting members for extrusion of circular plastic profiles
Novák, Jakub ; Veselý, Oldřich (referee) ; Koutný, Daniel (advisor)
In this work is developed a proposal for extrusion head for extruding plastic wires of small diameter. There is a new conceptual design of cooling, which allows shape extruded products already in the extrusion head and thereby eliminates the need for large cooling tanks. To determine the optimal design is used software named Virtual Extrusion Laboratory, which is used in practice for the simulation of the extrusion process. Then it is experimentally determined behavior of plastic material, when the temperature of the melt in the extrusion head is reduced.
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Technology design manufacturing threaded plastic ends
Vrátný, Martin ; Kebrle, Ondřej (referee) ; Kandus, Bohumil (advisor)
This diploma thesis submits a proposal of technology design manufacturing threaded plastic ends. In the first part it deals with literary studies of plastics and plastic injection molding. In the second part is the design of an injection form for the specified component. Part of the practical part is also the right choice of material and the injection mold, which was designed based on the calculations of technological parameters. In the conclusion of this thesis is technical economic evaluation.
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System for Plastics Packaging Waste Production Analysis
Bejdák, Jan ; Kropáč, Jiří (referee) ; Pavlas, Martin (advisor)
One of the very current topics today is the implementation of the principles of sustainable development and the circular economy. The Czech Republic has adopted legislative changes in this area and has committed itself to meeting the set targets for the utilization of municipal waste. This work deals with the development of a software tool for monitoring the production and structure of packaging waste in households. The principle of the tool lies in a database and a web application for user access to stored data. The main part of the work is a draft of the assignment for programming works on the tool. The draft consists in determining the logical context of the data used to describe the packages in the database, in specifying the functions of the web application and in creating a template for the user interface. The assignment was created iteratively based on testing of available tools. The current state of implementation of the draft is described.
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Design of a multifunctional leg rest box
Schmidtová, Markéta ; Košťál, David (referee) ; Svoboda, Petr (advisor)
The bachelor thesis deals with the design of a multifunction car box, which increases the comfort of children in car seats. The first part will describe requirements for ergonomically correct seating and development of the child. The height positions will be defined from these data and then the design solution will be executed. In the end stressed states and optimized solutions will be proposed.
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Production of injection molded parts
Kratina, Patrik ; Kandus, Bohumil (referee) ; Žák, Ladislav (advisor)
The work, elaborated within B-STG Engineering Bachelor´s degree program, is focused on the topic of injection molding into molds. In the introductory part, the work deals with materials suitable for injection. In the next chapter, the work is focused on the process of injection and description of individual parts and components of the injection machine and its tools. The thesis contains the concept of the technology of production ( injection moulding into metal molds) and its design solution. The conclusion of the thesis includes economic evaluation, attachment and drawing documentation.
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Study of the influence of fires of municipal and industrial waste landfills on the enviromental contamination, the combustion products of rubber and halogenated polymers
Sikora, Henryk ; Hroch, Martin (referee) ; Chýlková, Jaromíra (referee) ; Vávrová, Milada (referee) ; Čáslavský, Josef (advisor)
This thesis deals with the issue of fires of municipal and industrial wastes, particularly of rubber and halogenated polymers. When these materials burn, significant amount of harmful substances liberate into environmental compartments. Analysis of samples subjected to thermal decomposition in laboratory conditions explored formation of characteristic compounds in dependence on conditions of combustion. Samples of air, water and soil taken from real fires that occurred between the years 2007 – 2011 in the region of Western Bohemia monitored spreading of these substances into the environment. Majority of these samples were analysed by the means of gas chromatography with mass spectrometric detection. Additionally the effect of extinguishing methods and use of fire extinguishers on formation and spreading of combustion products was studied, especially in soil and in water sources.
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