Verfahren und Vorrichtung zum Beheizen der erwärmbaren Maschinenteile einer Doppelbandpresse

摘要

A process of heating parts of a double band press used in pressing a material moving through the press involves heating a heat transfer medium and flowing it through the press parts in a first direction and, at specific time intervals, reversing the direction of flow so that it passes in the opposite direction. By periodically reversing the direction of flow, differential thermal expansion is avoided within the press parts. In a device for carrying out the proces, a supply line and a return line are connected to a device for heating the return heat transfer medium. A reversing valve is connected to the supply and return line so that the direction of flow of the heat transfer medium through the press parts can be reversed for providing a balanced heating effect.