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Wrapping machine
Kosyk, Ivan ; Malášek, Jiří (referee) ; Kašpárek, Jaroslav (advisor)
The goal of this bachelor thesis is the design of a wrapping machine for EUR pallets with goods. The first part of the work includes a list of current concepts of wrapping machines, possible variants of construction and design solutions with their functions, a description of their advantages and disadvantages. In the second part of the work, the computational solution of the models and the selection of important components of the wrapping machine based on the input and required values are performed.
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Influnce of chemical composition on mechanical properties of LLDPE stretch film
Vojáček, Jakub ; Tocháček, Jiří (referee) ; Poláček, Petr (advisor)
Thesis summarizes the problems of production and use of stretch film. The change of strength, ductility and relative relaxation effect in different times of drawing from role in three weeks was observed. Further, change of strength and ductility due to changes in the rate of deformation, exposure to accelerated aging in a UV chamber and changes in the loading direction were observed. Mechanical tests were realized on a tensile tester, relaxation tests on DMA and crystallinity changes were observed on the DSC. Relationship between chemical composition of stretch film and mechanical and thermomechanical properties were studied. It was found that chemical composition essential for stretch film properties. However, due to the impossibility to distinguish effects of chemical composition and process parameters was impossible to find clear relation describing this relationship.
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Wrapping machine
Kosyk, Ivan ; Malášek, Jiří (referee) ; Kašpárek, Jaroslav (advisor)
The goal of this bachelor thesis is the design of a wrapping machine for EUR pallets with goods. The first part of the work includes a list of current concepts of wrapping machines, possible variants of construction and design solutions with their functions, a description of their advantages and disadvantages. In the second part of the work, the computational solution of the models and the selection of important components of the wrapping machine based on the input and required values are performed.
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Influnce of chemical composition on mechanical properties of LLDPE stretch film
Vojáček, Jakub ; Tocháček, Jiří (referee) ; Poláček, Petr (advisor)
Thesis summarizes the problems of production and use of stretch film. The change of strength, ductility and relative relaxation effect in different times of drawing from role in three weeks was observed. Further, change of strength and ductility due to changes in the rate of deformation, exposure to accelerated aging in a UV chamber and changes in the loading direction were observed. Mechanical tests were realized on a tensile tester, relaxation tests on DMA and crystallinity changes were observed on the DSC. Relationship between chemical composition of stretch film and mechanical and thermomechanical properties were studied. It was found that chemical composition essential for stretch film properties. However, due to the impossibility to distinguish effects of chemical composition and process parameters was impossible to find clear relation describing this relationship.
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