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1
Content available remote Effect of pouring temperature on the Lost Foam Process
100%
Pacyniak T. , Kaczorowski R.
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2011
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tom Vol. 11, iss. 3
149-154
EN
In this study, the analysis of the influence of the pouring temperature on manufacture process of castings by the Lost Foam method was introduced. In particular, numerical simulation results of effect of silumin and grey cast iron pouring temperature on pouring rate and gas gap pressure were analyzed. For simulating investigations of the Lost Foam process introduced mathematical model of the process was used. For calculations, the author's own algorithm was applied. The investigations have proved that with increasing pouring temperature the pouring rate increases, while pressure in the gas gap are decreasing. The author's own investigations showed a more significant effect of the silumin pouring temperature than grey cast iron pouring temperature on the lost foam process.
2
Content available remote Modeling of mould cavity filling process with cast iron in Lost Foam method Part 3. Mathematical model – pressure inside the gas gap
100%
Pacyniak T. , Kaczorowski R.
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tom Vol. 8, iss. 3s
79--83
EN
In this work mathematical model describing changes of pressure inside the gas gap was shown during manufacturing gray cast iron castings with use of lost foam process. Authors analyzed the results of numerical simulation enclosing influence of foamed polystyrene pattern density, permeability and thickness of refractory coating on pressure changes in the gap. Studies have shown, that all these parameters have significant influence on pressure inside the gas gap.
3
Content available remote Modeling of mould cavity filling process with cast iron in Lost Foam method Part 1. Mathematical model – rate of pattern gasification
100%
Pacyniak T. , Kaczorowski R.
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tom Vol. 8, iss. 3s
69--74
EN
In this work a mathematical model of mould cavity filling process with cast iron for lost foam method was shown, enclosing phenomena connected with gasification of foamed polystyrene pattern. For its description the thermal balance equation was used, which together with pouring rate equations (part 2) and pressure change equations (part 3) enabled determination of permeability, refractory coating thickness and foam pattern density influence on pouring rate, gas pressure in gas gap and its size. In this work authors showed results of numerical simulation concerning rate of pattern gasification and gas gap size, based on developed mathematical model. Presented studies indicated, that with decrease in coating permeability and increase in its thickness the gas gap size increased causing the decrease of foamed polystyrene pattern gasification rate.
4
Content available remote Ductile cast iron obtaining by Inmold method with use of LOST FOAM process
100%
Pacyniak T. , Kaczorowski R.
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tom Vol. 10, iss. 1
101-104
EN
The possibility of manufacturing of ductile cast iron castings by Inmold method with use of LOST FOAM process was presented in this work. The spheroidization was carried out by magnesium master alloy in amounts of 1% casting mass. Nodulizer was located in the reactive chamber in the gating system made of foamed polystyrene. Pretests showed, that there are technical possibilities of manufacturing of casts from ductile cast iron in the LOST FOAM process with use of spheroidization in mould.
5
Content available Influence of time and pressure of forming a pattern on mechanical properties
80%
Pacyniak T. , Buczkowska K. , Kaczorowski R.
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tom Vol. 11, iss. 3 spec.
151--156
EN
In this paper, the technology of forming patterns on a research station equipped with an autoclave A-600 of Polish company GROM is presented. This study was conducted to determine the influence of pressure and time of forming a pattern on the bending strength. Analysis of the results confirmed that bending strength increases with increasing the pressure. The time of forming a pattern has a similar effect.
6
Content available Selected Technological Properties of Liquid Ceramic Slurries Used to Produce Moulds in the Replicast cs Technology
80%
Kaczorowski R. , Pacyniak T. , Just P.
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nr 4
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