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Radiators and microbial microclimate
Raputa, Pavel ; Rubinová, Olga (referee) ; Počinková, Marcela (advisor)
This master thesis describes the design of heating in a new one-storey nursery school in Kuřim. The heating systém is designed as a low-temperature systém with a forced circulation of water and a horizontal piping. Three kinds of radiators are used in the design. The panel radiators, tube radiators and free-standing convectors. In this project there are two varinats of the heat source for buliding. The first variant is two gas condensing boilers and the second variant is two heat pumps of an air/water split design. The disign includes air heating in the unit of air conditioning and hot water preparation. The experimental part of the master thesis is focused on microbial microclimate in buildings and radiators contamination by microorganisms. It contains four different experiments, their realization, results and evaluation.
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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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Air Conditioning equipment
Frühauf, Patrik ; Rubina, Aleš (referee) ; Rubinová, Olga (advisor)
This thesis deals with the relationship between HVAC systems and internal microclimate of buildings. The work discusses briefly about different components which are formulating internal microclimate. More details are then focused on the issue of microbial microclimate.
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Production of part Fixing washer
Para, Marcel ; Kandus, Bohumil (referee) ; Žák, Ladislav (advisor)
Order was given for the prodiction of 20 000 pieces of fixing washers. In this case was chosen injection moulding technology. Based on the research, a structural design of the mold was prepared together with the drawing documentation. From the range of materials, it was chosen polypropilene MOSTEN GB218, which is suitable for the given produstion. The simulation verified the reliability and quality of production. The parameters of injection moulding were determined by calculations, and the machine J180ADS – 180U was selected base of them. In the economic evaluation, the total costs for the production of the entire series were established on Nc=19626,43€.
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Making sand moulds and cores for casting
Katrňák, Jiří ; Kaňa, Václav (referee) ; Pernica, Vítězslav (advisor)
Bachelor thesis describes various methods for the production of sand molds and cores in foundry and basic concepts associated with this issue. Due to the large number of production methods are described only basic and most widespread methods. The work includes the design and manufacture of cast-iron grate for the stove, made into a mixture of bentonite and self-hardening mixture AlpHasetTM.
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Design of manufacturing technology for plastic mount carbon
Fojtík, Jakub ; Mořkovský, Václav (referee) ; Kandus, Bohumil (advisor)
This master thesis deals with design of injection moulding technology for plastic holder of carbon brushes made of polycarbonate labelled Lexan 945A. The injection is performed into injection mould with hot runner system. Initially there is general study related to plastics and injection moulding technology. Further the study continues with injection moulds with hot runners and ends with computer analysis of injection moulding process. The designed injection mould for production of plastic holders is three-plate, double cavity mould with four hot nozzles and one parting plane, where one of the plates serves for mounting of the hot runner system inside the mould. This work contains part of the drawing documentation and item list of the injection mould. The selected injection moulding machine is Arburg Allrounder 370 U labelled 700-290 according to EUROMAP.
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Design of technology for a mould manufacturing for casting in short run production
Pivoda, Miroslav ; Dvořáček, Jan (referee) ; Sedlák, Josef (advisor)
The aim of thesis is to describe the basic methods called Rapid Prototyping in theory and using one of them to create master model. Master model will be used to create silicone mould where a limited series of wax models will be by means of vacuum casting chamber. They will also be used to make ceramic form in which the final pad will be cast from freely accessible materials. After processing it the suitability of the proposed technologies for the production of the part in question will be assessed.
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