Casting process in which the liquid metal is poured directly through the feeder. In this way, the exothermic-insulating feeder with integrated pouring filter standing directly on the pattern can eliminate the gating system (Fig. 1, Foseco Foundry Division Vesuvius GmbH)
This technology can be used when a conservative gate system is not possible, for example the component construction or limited space on the pattern plate. This process is often used in automatic high-pressure molding lines that do not have access to the cope site of the molding box.
Functional principle (Foseco Foundry Division Vesuvius GmbH):
The feeder is placed on the centering mandrel attached to the pattern, which also serves as a sprue column (Fig. 2, Foseco Foundry Division Vesuvius GmbH). The integrated filter moves into a vertical position by means of a folding hinge. Then the molding and pressing process is initiated (Fig. 3, Foseco Foundry Division Vesuvius GmbH). Here, the breaker core is compressed and optimally compacts the molding sand in the area of the feeder. When the pattern is removed from the mold, the foam ceramic filter returns to its original position. After the cope site of the molding box has been placed in place and the pouring pool has been milled, the casting process can begin (Fig. 4, Foseco Foundry Division Vesuvius GmbH). At the end of the pouring process, the filter floats in order to enable process-reliable feeding. The video shows the complete functionality.
The main advantages (Foseco Foundry Division Vesuvius GmbH):