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Alternative Methods Using in Mold and Core Technologies

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Mold and Core Sands in Metalcasting: Chemistry and Ecology

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Abstract

Technologies of producing molds and cores used for producing castings of special alloys, of complicated shapes and high functional properties, are described. Castings manufactured in these processes, mainly for the cosmic, aircraft, automotive, and armament industry, are of the highest quality. The Rapid Prototyping (RP) process deserves a special attention. The base of the whole process is the digital 3D model made in the CAD environment. The RP is the additive method, which means it is based on a gradual placement of a material, layer after layer. This process is very efficient in small series and in piece production.

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Notes

  1. 1.

    Expanded polystyrene (EPS), i.e., foamed polystyrene, is obtained by foaming of polystyrene granules. Polystyrene is a polymer obtained in the polymerization process of styrene, originated from refining of crude oil or from catalytic dehydrogenation of ethylbenzene (Fig. 13.1).

  2. 2.

    Methyl methacrylate (MMA) is used for a production of methyl polymethacrylate (PMMA), one of the widely applied plastics, the so-called organic glass, known as Plexiglas. It is also applied in a production of emulsions for paints and lacquers, cosmetics, and acrylic resins (Fig. 13.2).

  3. 3.

    However, SF6 is a strong greenhouse gas contributing the climate warming and therefore its application is limited in several countries. Other protective gases for the melting magnesium alloys are looked for, e.g., Freon. HFC-134a.

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  1. AGH University of Science and Technology, Krakow, Poland

    Mariusz Holtzer & Angelika Kmita

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  1. Mariusz Holtzer
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Holtzer, M., Kmita, A. (2020). Alternative Methods Using in Mold and Core Technologies. In: Mold and Core Sands in Metalcasting: Chemistry and Ecology . Springer, Cham. https://doi.org/10.1007/978-3-030-53210-9_13

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