Method for casting cast parts

A method for casting a cast part, in which a molten metal is poured into a casting mould which encloses a cavity forming the cast part which is to be produced, wherein the casting mould, designed as a lost mould, includes one or more casting mould parts or cores which are formed of a mould material which includes a core sand, a binder and, optionally, one or more additives for adjusting particular properties of the mould material, the method comprising the following working steps:

• providing the casting mould;
• enclosing the casting mould in a housing forming a filling space between at least one inner surface section of the housing and an associated outer surface section of the casting mould;
• filling the filling space with a free-flowing filling material;
• and
• pouring molten metal into the casting mould,
• wherein, as a result of the pouring of the molten metal, the casting mould begins to radiate heat, the consequence of the input of heat caused by the hot molten metal,
• wherein, as a consequence of the input of heat caused by the molten metal, the binder of the mould material begins to vaporise and combust, so that it loses its effect and the casting mould disintegrates into fragments;
• wherein the filling material poured into the filling space has such a low bulk density that the filling material packing formed by the filling material following filling of the filling space is permeated by a gas flow and wherein, on filling the filling space, the filling material has a minimum temperature starting out from which the temperature of the filling material rises as a result of process heat which is generated through the heat radiated from the casting mould and through the heat released during combustion of the binder, to above a boundary temperature at which the binder evaporating from the casting mould and coming into contact with the filling material ignites and begins to combust.