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3 Archives of Foundry Engineering

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Investigate the Possibility of Tekcast Methods Used for Casting Polymeric Resin Materials

Mäsiar H., Repka L., Lipták P., Híreš O.

Archives of Foundry Engineering

2014

Vol. 14, iss. 2

116--122

Contribution gives an overview of knowledge about the method of centrifugal casting with orientate on Tekcast system. Company Tekcast Industries has developed a device for centrifugal casting, extending the area of production of castings or prototyping of metal or plastic. Materials suitable for the centrifugal casting with flexible operating parameters may include non-ferrous metal alloy based on zinc or aluminum or non-metallic materials such as polyester resins, polyurethane resins, epoxy resins, waxes and the like. The casting process is particularly suitable for a wide range of commercial castings and decorative objects.

Investigation of selected thermo-physical properties in the Co-based superalloy: Experiment and application study

Kasala J., Mäsiar H., Pernis I.

Archives of Foundry Engineering

2010

Vol. 10, iss. 1 spec.

203--206

Thermo-physical properties are the critical input parameters in computational models of solidification and casting simulations. In thermodynamics, the enthalpy is quotient of thermodynamic potential of a system, which can be used to calculate the useful work obtainable from a closed thermodynamic system under constant pressure. Differential thermal analysis has been used to study melting and solidification paths in the cobalt based superalloy FSX-414. The temperature enthalpy curve was determined from differential thermal analysis curves obtained from solidification curves. A solidification simulation of a cobalt base multi-component alloy casting was carried out to predict cooling and shrinkage porosity in the casting of a turbine engine vane segment. The effect of latent heat on the heat transfer calculation was considered by enthalpy method.

Effect of polyethylene oxide on properties of bentonite foundry mixtures

Mäsiar H., Kasala J., Kaloforov N.

Archives of Foundry Engineering

2007

Vol. 7, iss. 1

69-72

Very small quantities of polyethylene oxide (PEO) with molecular weight of 600,000 exhibit a non-additive effect of increased permeability that is higher in higher compaction energies (19.62 J). Increased permeability has been proven at such small PEO quantities as 0.0365 %-wt., 0.073 %-wt., and 0.1 %-wt. The above mentioned very small PEO quantities result in slightly increased bondability. It is estimated that PEO effect will find application in metal casting at lower melting temperatures.