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Optimization of the vacuum deaeration of the injection mold
Rohlínková, Marie ; Kebrle, Ondřej (referee) ; Kandus, Bohumil (advisor)
The project elaborated design of optimization venting of molds exhibiting bubbles or low quality weld lines. Based on a literature study of the injection mold venting, the use of vacuum venting, namely the VACUUMJET system of the Spanish CUMSA manufacturer, has been proposed. The experiments proved the elimination of bubbles in the part and the marked improvement of visual quality of the weld lines. The effect on the closing force was not confirmed. The use of the system is more economical for larger batches production, or when high quality parts are required that allow price increasing.
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Increasing the life of cutting blades
Rohlínková, Marie ; Lidmila, Zdeněk (referee) ; Podaný, Kamil (advisor)
Thesis suggest possible methods of increasing the life of a cutting blade, which is made of steel 19 733 and is used for cutting stator laminations from silicon materials. Mentioned metal sheets are very hard which leads to higher demands on cutting blades. The optimal method chosen, as based on studies of relevant literature, was ion nitriding which provides increase in surface hardness to 64 HRC. Increase in surface hardness while also preserving the toughness of the core was further confirmed by an experimental measurement of hardness, which was measured on two samples. First sample was left in the original state and the second sample was ion nitrided. According to the scratch pattern the thickness of nitrided layer is 0.1 mm.
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Optimization of the vacuum deaeration of the injection mold
Rohlínková, Marie ; Kebrle, Ondřej (referee) ; Kandus, Bohumil (advisor)
The project elaborated design of optimization venting of molds exhibiting bubbles or low quality weld lines. Based on a literature study of the injection mold venting, the use of vacuum venting, namely the VACUUMJET system of the Spanish CUMSA manufacturer, has been proposed. The experiments proved the elimination of bubbles in the part and the marked improvement of visual quality of the weld lines. The effect on the closing force was not confirmed. The use of the system is more economical for larger batches production, or when high quality parts are required that allow price increasing.
|
|
|
Increasing the life of cutting blades
Rohlínková, Marie ; Lidmila, Zdeněk (referee) ; Podaný, Kamil (advisor)
Thesis suggest possible methods of increasing the life of a cutting blade, which is made of steel 19 733 and is used for cutting stator laminations from silicon materials. Mentioned metal sheets are very hard which leads to higher demands on cutting blades. The optimal method chosen, as based on studies of relevant literature, was ion nitriding which provides increase in surface hardness to 64 HRC. Increase in surface hardness while also preserving the toughness of the core was further confirmed by an experimental measurement of hardness, which was measured on two samples. First sample was left in the original state and the second sample was ion nitrided. According to the scratch pattern the thickness of nitrided layer is 0.1 mm.
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