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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.
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Methodology of injection mold design in the CATIA V5
Přikryl, Adam ; Koutecký, Tomáš (referee) ; Paloušek, David (advisor)
This bachelor's thesis descirbes the design solution of an injection mold for the cover of the cooling-air fan from the truck. Software Catia V5R19 is used for the design solution. First part of the bachelor's thesis describes basic information about injection molds, molding machines and injection cycle. Very solution of the thesis describes the proces of designing an injection mold for the specified plastic part. Part of the design is the 3D model of injection mold.
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Design of manufacturing technology for plastic program disc
Gráf, Radomír ; Kebrle, Ondřej (referee) ; Kandus, Bohumil (advisor)
This thesis is concerned with the appropriate design of manufacturing technology for plastic program disc including the design of plastic printing technology. At the beginning of this thesis was made an analysis of requirements for manufactured device including selection of the most appropriate technology for its manufacturing – plastic injection. In the theoretical part are described all skills needed for designing and construction of the injection mould. Partial theoretical parts are concerned with the issue of plastic materials, tools and engines for injection, and of plastic printing technology. Practical part is concerned with description of design of each single system inside the injection mould including calculation. On the basis of these calculations was selected the appropriate injection engine. The end of the practical part is concerned with the selection of the appropriate engine for printing on the plastic device which is manufactured by the technology of plastic injection. For construction of the injection mould were applied normalities of the Hasco Company and the 3D CAD system Solidworks. The conclusion of this thesis achieves the technical- economical evaluation for manufacturing of designed plastic device.
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Design of plastic parts of the sports car front bumper
Najvar, Petr ; Drápela, Miloslav (referee) ; Koutný, Daniel (advisor)
This thesis deals with the plastic parts design for VW Scirocco R front bumper. Plastic parts were designed for an injection molding mass production. Besides of designing a shape of the parts based on package, assembly concept, functional and aesthetic requirements, great deal of attention is applied to proper part molding with regard to technological and economic aspects.
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Production technology of plastic threaded adapters
Turek, Tomáš ; Kebrle, Ondřej (referee) ; Kandus, Bohumil (advisor)
The Master thesis deals with the possible production of the plastic unit with thread. As the most suitable material was chosen the polyformaldehyde (POM), its production label is Delrin 500P NC010 by Du Pont. The thesis consists of a part with the information about the technology of injection molding of plastics and a part where processing parameters for the production of the plastic unit are designed. Part of the solution was to create an assembly design of injection mold. Since the plastic unit with thread is very specificly shaped the form is handled as a slide mold. The mold is pieced together from normalized parts by the Hasco and DME company. The serie of 100 000 pieces would be delivered in 5 months. Because of the cost savings a solution of the cold-runner system was suggested. A suitable injection molding machine was chosen from the calculated values from Arburgfroms – Type 370s Allrounder 500-170.At the end of the thesis costs were evalueted for acquire per one piece of adapter.
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Quality assessment of a thermostat valve
Kropáč, Ondřej ; Harčarík, Matej (referee) ; Jankových, Róbert (advisor)
The automotive thermostat currently contributes significantly to the potential to reduce the output of the exhaust gases. The heart of the modern thermostat is the ball valve assembly which also deals with this master‘s thesis. First of all the principles of the quality of the automotive thermostat are described with the choice of further deeper examined properties. The manufacturing process of a ball element and PTFE sealing ring is described. Subsequently the problem of increased production of nonconforming products in production is studied focusing on the surface texture of teflon ring and shape analysis of the ball element. Finally a recommendation for practice with regard to the reduction of additional costs associated with poorly manufactured part is created and further action on this issue is recommended.
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Design of manufacturing technology for plastic car emblem
Bombera, Mojmír ; Krška, Petr (referee) ; Kandus, Bohumil (advisor)
The project elaborated in scope of engineering studies branch 2307. The project is submitting design of production technology of car emblem. Different manufacturing technologies have been compared based on study of technical literature. Most suitable technologies have been chosen such as pressure die casting, especially aluminum alloys and plastic injection molding. Plastic part is metal plated afterwards in order to get desired metal look. Part of this project is injection molding tool design inclusive technical, technological and economic analysis.
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Production technology of mobile phone plastic cover
Přehnal, Jan ; Žák, Ladislav (referee) ; Kandus, Bohumil (advisor)
This project, elaborated within the Engineer Diploma studies of the 2307 branch, presents a design of a production technology of a mobile phone plastic cover. A technology of injection of plastics on the Demag Ergotech 80 injection machine has been designed on he basis of belles-lettres of injection of plastics and calculation. A shedder has been used to eject the parts. Material ABS NOVODUR P2H – AT (manufacturer: Bayer) has been used to produce the part. The mould is designed with the axial injection technology (perpendicularly to the dividing plane), closing force is 800 kN.
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