Preliminary communication

Determination of electrical properties of materials used in microwave heating of foundry moulds and cores

B. Opyd ; Wroclaw University of Technology, Department of Foundry Engineering and Automation, Wrocław, Poland
K. Granat ; Wroclaw University of Technology, Department of Foundry Engineering and Automation, Wrocław, Poland
D. Nowak ; Wroclaw University of Technology, Department of Foundry Engineering and Automation, Wrocław, Poland

Abstract

The environment-friendly and cost efficient microwave heating of moulding and core sands opens possibilities to use plastics and wood for structures of foundry instrumentation, where transparency to microwaves is the main requirement. Presented are results of a preliminary research on determining possibilities to use selected materials in microwave field. From the viewpoint of specificity of this process, the basic parameter is ability to absorb or transmit microwave radiation. Determined were the following electrical properties: tangent of dielectric loss angle and permittivity of selected materials. The materials were classified according to their transparency to electromagnetic radiation in order to choose the ones suitable for tooling applied in foundry processes.

Keywords

electrical properties; permittivity; dielectric loss factor; microwaves; foundry tooling

Hrčak ID:

128958

URI

https://hrcak.srce.hr/128958

Publication date:

1.4.2015.

Visits: 1.982 *