|
|
Defects at injection molding
Kuchař, Petr ; Kandus, Bohumil (referee) ; Žák, Ladislav (advisor)
The aim of this bachelor thesis was a literary study of defects created in the injection molding process of plastic materials. The study of the injection technology itself was carried out in the first part of this work. Second part of this thesis is focused on the study of defects accompanying the plastic injection process, their distribution, description, causes of the origin and possibilities of repair. Among the most problematic obvious defects accompanying the plastic injection process are the weld lines and the defects associated with. In the case of hidden defects, it is particularly internal tension. The individual defects are supplemented by suitable pictures and tables for more clarity and transparency, where the causes of the origin and the possibility of repairing specific defects are more analyzed.
|
|
|
Numerical simulation of mold filling and casting solidification
Kolda, Vlastimil ; Herman,, Aleš (referee) ; Krutiš, Vladimír (advisor)
The object of this diploma thesis is to analyze, persuant to numerical simulation of current technology of production aluminous casting roller-reck V9X, causes of the rise of cold lap and laminations defects. Consequently, to work up a project of variant solution of the shape of casting so, as to come to elimination mentioned defects. This variant solving will be tested with numerical simulation as well. Fruitfulness of these designed changes will be verified by testing molten of the casting. In terms of solve the problem the simulation of cycling of the mold and subsequently the filling of the casting will be effected. During the analyse of filling of the die the first phase of filling will be effected too.It means the movement of the piston throught the chambre. Simulation of solidification of the casting wont be effected because of the type of the defect.
|
|
|
Defects at injection molding
Kuchař, Petr ; Kandus, Bohumil (referee) ; Žák, Ladislav (advisor)
The aim of this bachelor thesis was a literary study of defects created in the injection molding process of plastic materials. The study of the injection technology itself was carried out in the first part of this work. Second part of this thesis is focused on the study of defects accompanying the plastic injection process, their distribution, description, causes of the origin and possibilities of repair. Among the most problematic obvious defects accompanying the plastic injection process are the weld lines and the defects associated with. In the case of hidden defects, it is particularly internal tension. The individual defects are supplemented by suitable pictures and tables for more clarity and transparency, where the causes of the origin and the possibility of repairing specific defects are more analyzed.
|
|
|
Numerical simulation of mold filling and casting solidification
Kolda, Vlastimil ; Herman,, Aleš (referee) ; Krutiš, Vladimír (advisor)
The object of this diploma thesis is to analyze, persuant to numerical simulation of current technology of production aluminous casting roller-reck V9X, causes of the rise of cold lap and laminations defects. Consequently, to work up a project of variant solution of the shape of casting so, as to come to elimination mentioned defects. This variant solving will be tested with numerical simulation as well. Fruitfulness of these designed changes will be verified by testing molten of the casting. In terms of solve the problem the simulation of cycling of the mold and subsequently the filling of the casting will be effected. During the analyse of filling of the die the first phase of filling will be effected too.It means the movement of the piston throught the chambre. Simulation of solidification of the casting wont be effected because of the type of the defect.
|
guest ::
