National Repository of Grey Literature 2 records found  Search took 0.00 seconds. 
Electro discharge machining with a focus on graphite and copper electrodes
KOLÁŘ, Zbyněk
The entry part introduce into the problematic of rework processes by molding injection tools for thermoplastic. Aim is necessity of change current rework process usage by electro discharge machining (EDM) technology.The theoretical part of the thesis describes the physical essence of EDM technology, the system of production of cutting electrodes and related issues. The practical part of work compare the process of production of copper and graphite electrodes with focus on production time and costs. The production parameters of the EDM process were analyzed and the wear of copper and graphite electrodes during the production process was compared. Main result of the thesis is an evaluation of the research activity, interpretation of the results of this activity and a proposal of measures to shorten the production time of the cutting electrodes and the time of the EDM machining by these electrodes.
Construction of injection tools focusing on their lifetime
KOLÁŘ, Zbyněk
This thesis deals with lifespan of tools for molding injection of the thermoplastic. Theoretical part is focused on injection tool in terms of design. It summarizes all conditions and requirements which regard to the tools lifespan. Evaluation of the loading conditions for the injections tools is described in practical part of the thesis. Subsequently are in this part evaluated materials used by contracting authority for manufacturing and repairing of the molding tools.

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16 Kolář, Zdeněk
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