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National Repository of Grey Literature 13 records found  previous11 - 13  jump to record: Search took 0.00 seconds. 
The production of unframed foundry moulds with bentonite binder on automatic molding lines
 Macko, Martin ; Neudert, Alois (referee) ; Cupák, Petr (advisor)
This thesis aims to describe production of unframed foundry moulds on automatic molding lines with special focus on moulds with bentonite binder, while comparing it to production on framed molding lines.
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Modern anorganic foundry binder systems
 Lorenc, Michal ; Rusín, Karel (referee) ; Cupák, Petr (advisor)
Today, the problem caused by various kinds of activities is a great impact on the environment. This also applies for the foundry industry, which has a relatively large share of this pollution. For this reason, constantly evolving new binders, which do not have such an impact on the environment. The aim of this work is to become familiar with these types of binders that are more friendly to our already devastated the planet.
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Influence of type of base sand on strength of geopolymer sand mixture
 Kudr, Martin ; Šupálek, Milan (referee) ; Cupák, Petr (advisor)
The goal of this research is to find out the effect of different types of opening material on bending strength geopolymer’s moulding mixture. Four different silical opening material were used along with two types of binder. To solve the selected problem I have used the test of bending strength. At first I have prepared the moulding mixture and after its induration, I have tested the bending strength. The times were always the same 60, 120 and 1440 minutes. The highest level of bending strength was achieved at opening material SH-34 when using binder Geopol 618. The value of bending strength level was 0,881MPa. The results of this research could help the foundries during implementing technology of geopolymer moulding mixture, which would help particulary when looking for a proper opening material.
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