Wyniki wyszukiwania - BazTech

Ograniczanie wyników

2 Archives of Foundry Engineering

Znaleziono wyników: 2

Liczba wyników na stronie

Wyniki wyszukiwania

Wyszukiwano:
w słowach kluczowych: polystyrene model

Sortuj według:

Ogranicz wyniki do:

Prototype Stand for Determining Quantities of Gasification Products of Polystyrene Model

Jureczko Michał, Bartocha D.

Archives of Foundry Engineering

2021

Vol. 21, iss. 4

15--20

Disposable foundry models constitute an increasingly important role in a unitary large-size foundry. These models have many benefits, but technologies using such materials require an understanding of degradation kinetics at the time of filling. The studies presented in the article determine the size of the polystyrene combustion products used for disposable foundry models. The results were obtained by carrying out the combustion process of the polystyrene model in a special combustion chamber, in different configurations. The pressures generated during thermal degradation vary depending on process parameters such as model density or the use of an additional adhesive binder. The results of laboratory tests may suggest what values of pressure are generated when filling in full-mold and lost foam technologies. The studies provide a prelude to further analysis of materials used for disposable foundry models and quantitative evaluation of their thermal degradation products for computer simulation.

Research on the Influence of Basic Parameters of the Pre-Expansion of Granules Density

Buczkowska K., Kaczorowski R., Pacyniak T.

Archives of Foundry Engineering

2013

Vol. 13, iss. 2 spec.

22--28

The paper presents the process of pre-expanded polystyrene used to produce models in the Lost Technology. There were research on pre-expansion process in order to determine the effect of pressure and time for the initial expansion of the materials density. Analysis of the results confirmed that the higher the pre-expansion pressure is the materials density decreases. There was also a change in the intensity of the process in function of time and pressure, which may indicate the phenomena of material physical and chemical properties during the process.