Method, while occupying a minimum in terms of equipment, the main piece is formed at least one through-hole according to the invention for casting so as to have optimum mechanical properties,
a) the through hole (O1, O2 as to form), including a binder, a mold or an external force to at least one mold core (8-19) consisting of a mold material is decomposed under the influence of the temperature is present (2) steps to prepare,
b) step of injecting a mold (2) into the molten metal (S) to form a cast strip (Z1, Z2),
c) the mold (2) being less than the liquidus temperature of the molten metal (S) in the steps of cooling to a temperature higher than the minimum temperature of the accelerated cooling is made to form a tissue seal,
d) at least one of the areas at the time of injecting the molten metal into the mold, the through hole (O1, O2) and the mold (2) disposed in the expanded portion (V1, V2) of the core mold core (8-19) discarding or heat input to a degree, into the mold (2) to burn the binder from the mold core (8-19) in the mold material for forming a through-hole (O1, O2), by destroying mechanically opened to the outside of the mold (2) , the through hole (O1, O2) for the leading through of the product (Z1, Z2) - forming a channel (G1, G2),
And a step of cooling channels (G1, G2) for the cooling medium (M1, M2) flows, a cast steel (Z1, Z2 in the mold (2)) through - e) the perforation.