Compact moulding process

The compact moulding process is a manufacturing process in the investment casting industry, which is also known as the flask moulding process. It is particularly suitable for low-melting metals and alloys based on aluminium or zinc. A particular advantage of this process is that the moulding materials used have a very high flowability and thus precisely reproduce all contours of the model. This means that geometries that cannot be produced in the classical way can be produced easily and quickly.

First of all, models are made of PMMA or wax in silicone moulds, which correspond to the actual casting in terms of geometry and surface finish. We use the vacuum casting process for this. In combination with the subsequent finishing of the wax models, a very high accuracy and surface quality of the models is achieved.

The models are inserted individually into an embedding machine. The metallic cavity, the so-called flask, is then filled with a plaster-like mass under vacuum. This creates a compact mould with an enclosed model, which is then melted out or burnt out. When the mould has cooled down to casting temperature, casting is carried out in the selected casting process.

After casting, the mould is removed mechanically. The components are cleaned and mechanically machined if necessary.

The selection of the moulding process depends not only on the desired number of pieces but also on the material used. Based on your component requirements, we will suggest the most suitable process. Our CAD department will make the necessary changes for the design suitable for casting in cooperation with you.

Production of investment casting components in the flask moulding process using 3D-printed master models

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