As one of the first phosphate-bonded mould investments for vacuum die-casting, , EMVest XL makes it possible to cast up to 25kg of steel in one flask. The use of investment materials eliminates the time-consuming step of building up the mould shell layer by layer and dewaxing it in the oven. This enables fast implementation and short delivery times. This results in
a clear advantage over classic shell mould casting, especially in the production of individual pieces, spare parts, prototypes and small series. This allows foundries to expand their product range in general and provides a time saving advantage for small quantities, spare parts or prototypes. The investment material EMVest XL can be used to increase the casting weight of cast steel components in flask investment casting and thus enables exploration of the process advantages for more components. Another outstanding advantage of the castable mould filers is the very good ability realizing strongly "undercut" contours, filigree structures, channels, etc., which cannot be produced in the standard investment shelling process.

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Currently, no inorganic binder systems are available in Germany and Europe with which steel components with a casting weight of more than 5 kg can be successfully cast in flask investment casting. The targeted process allows pressure-assisted mould filling through the use of vacuum/pressure casting systems. In vacuum/pressure casting systems based on the two-chamber principle (flask chamber and melting chamber), a vacuum can be generated in the flask chamber before and during casting, while a positive pressure is built up in the melting chamber of the casting. Both together create a pressure difference of up to 3 bar, which supports the flow of the melt into the mould and contributes significantly to the complete filling of even filigree component structures.The moulding material EMVest XL can be heated to temperatures of up to 1000°C for the casting process. In combination with the evacuated mold chamber during casting, this represents a significant advantage in the production of castings with very thin walls and "sharp-edged" contours.

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*The product EMVest XL was developed in cooperation with the Fraunhofer Institute Bremen

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