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3 Archives of Foundry Engineering

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The influence of the basic styrofoam patterns final shaping parameters on the resistance properties

Pacyniak T., Buczkowska K.

Archives of Foundry Engineering

2012

Vol. 12, iss. 4

121-126

This work presents the analysis of the final shaping process of the patterns aimed at determining the influence of the pressure and the time of sintering on the resistance to bending. The analysis of the research results proved that when the pressure of the sintering rises and reaches Ps=2.1 bar the resistance to bending increases, above this level of the pressure the resistance value starts decreasing. The time of styrofoam sintering at which the highest bending resistance values were obtained is ts=90 s. When the sintering pressure is less than 2 bar prolongation of the time of sintering over 90 s causes a slight increase in the resistance, however, at higher pressures prolongation of the time of sintering causes submelting of the styrofoam pattern.

The analysis of the influence of the polystyrene patterns shaping parameters on the resistance properties

Pacyniak T., Buczkowska K., Bogus W.

Archives of Foundry Engineering

2012

Vol. 12, iss. 2

227-234

This work presents the technology of making foam plastics patterns used in casting as well as the final shaping stand. The analysis of the sintering process was carried out aiming at determining the influence of the pressure and the time of sintering on the flexural strength properties. The analysis of the research results confirmed that when the sintering pressure grows to the value of Pa =1,7 bar the flexural strength also increases, when the pressure value is higher than that, the degradation of the material takes place and the strength properties decrease.

Influence of time and pressure of forming a pattern on mechanical properties

Pacyniak T., Buczkowska K., Kaczorowski R.

Archives of Foundry Engineering

2011

Vol. 11, iss. 3 spec.

151--156

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.