Wyniki wyszukiwania - BazTech

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Determination of the Surface and Volume Porosity, on the Basis of the Main Fraction of the Polifractional Matrix of Moulding and Core Sands

Dańko R., Dańko J.

Archives of Foundry Engineering

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2016

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Vol. 16, iss. 4

191--195

EN

The aim of the hereby paper is to present the developed model of determining the volume and surface porosity based on the main fraction of polifractional materials, its experimental verification and utilisation for the interpretation of effects accompanying the formation of a moulding sand apparent density, porosity and permeability in the blowing processes of the core and moulds technology.

2

The Influence of Sand Grains Properties on Electrical Properties of Moulding Sand with Inorganic Binder

Opyd B., Granat K.

Archives of Foundry Engineering

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2015

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Vol. 15, iss. 3

43--46

EN

The paper presents the results of basic research on the influence of the properties of sand grains on electrical properties of water glass moulding sands. It shows electrical properties of the main component – sand grains, crucial to the kinetics of moulding sands heating, such as permittivity εr and loss factor tgδ. Measurements were carried out with the use of the perturbation method for silica, chromite and olivine sands of different mineral, chemical composition and particle size distribution, as well as for moulding sands with water glass grade 145. Analysis of the results of measurements of electrical properties shows that all moulding sands are characterized by a similar permittivity εr and loss factor tgδ. It was found that the electrical properties and the quantity and quality of other components may have a decisive influence on the effectiveness and efficiency of the microwave heating of moulding sands with sand grains. In determining the ability to efficiently absorb the microwave radiation for mixtures which moulding sands are, the impact of all components influencing their individual technological parameters should be taken into account.

3

Analiza powierzchni ziaren osnowy poddanej regeneracji termicznej

Łucarz M., Dańko J., Dańko R., Bodzoń L.

Archiwum Technologii Maszyn i Automatyzacji

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2001

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Vol. 21, Nr 1

79-88

PL

W artykule przedstawiono rezultaty badań mających na celu określenie wpływu zanieczysz-czeń powstałych podczas regeneracji termicznej na właściwości technologiczne masy rdzeniowej wytworzonej z wykorzystaniem regenerowanej cieplnie osnowy. Badania obejmowały również analizę wpływu czasu regeneracji termicznej zarówno na właściwości technologiczne, jak i na morfologię powierzchni ziaren dla różnych rodzajów zużytej masy ze spoiwami żywicznymi.

EN

The results of investigation of the influence of impurities formed on grain surface during ther-mal reclaiming process on technological properties of core sand made from multi recycled sand. The influence of reclamation time duration and different reclamation treatment on tested properties was also evidenced, as well as on the morphology of sand grain surface the various cycles time adopted during thermal treatment of used sand with the resin bond enables to choose the proper time and execution of thermal reclamation process.