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International Trade Fair for Die Casting: Technology, Processes, Products

18 - 20 January 2022 // Nuremberg, Germany

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Exhibitors & Products EUROGUSS 2020
Zoom Image LOGO_Vacuum Density Tester 3VT plus (Density Index)

Vacuum Density Tester 3VT plus (Density Index)

LOGO_Vacuum Density Tester 3VT plus (Density Index)

Vacuum Density Tester 3VT plus (Density Index)

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The Vacuum Density Tester 3VT plus is used for casting two samples for density-comparison purposes and determining the Density Index with the Density Index Balance MK 3000.

Metallic and non-metallic impurities as well as hydrogen and oxides may negatively affect the quality of an aluminium melt. By measuring the Density Index, it is possible to define, control and optimise the process of cleaning the melt, thereby improving the quality. In this way the consistently high quality of the melt is assured and the reject rate effectively reduced.

In order to determine the density index, two samples of the melt are required. One of the samples is made under a defined vacuum of 80 mbar and the other at atmospheric pressure with the Vacuum Density Tester series 3VT or ASLP. The vacuum allows hydrogen pores to form in the melt sample, which means that this sample is less dense than the one made at atmospheric pressure.

After solidification, the samples are cooled in water, weighed and their exact densities determined with the Density Index Balance MK 3000. The density index represents the percentage difference in density between the two samples. The lower the density index the cleaner and aluminium melt and the fewer pores formed.

The process of the Density Index is worldwide known and in operation at many customers of mk Industrievertretungen GmbH. They are served by mk personally as well as by a team of representatives operating worldwide.

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