model making

Lost models made of expanded polystyrene (EPS)

We produce castings from aluminum using lost molds made of bonded sand. Typically, models (positive images of the later casting) are required for the production of the sand molds. An exception is the direct production of molds and cores using 3D printing.

A distinction is made between permanent models (for example, made of wood) and lost models. This refers to the reusability after molding in foundry sand. For individual parts, the production of sand molds with casting models made of expanded polystyrene (EPS; colloquially known as Styrofoam) is regularly the most economical approach. These models are generally only usable once – hence lost models. The model is destroyed during the casting process, making it a single-use template. This method is particularly cost-effective for unique or limited production runs.

For the production of the models, we have our own foundry model construction (pattern shop), which enables us to quickly and flexibly implement the requirements of our customers. This literally means we have short paths. Optimal coordination between the foundry and model construction is thus ensured. Transport time and damage are eliminated.

We produce the models by milling from EPS blocks. For this, we use a 5-axis milling machine with a working area of 8,000 x 4,000 x 2,000 mm.