CASTING MOULD Russian patent published in 2018 - IPC B22D27/04 B22C7/02 B22C9/04 C30B11/00 

FIELD: metallurgy.

SUBSTANCE: invention relates to model (12) for a one-time casting models made in the form of a blade of gas turbine engine shaft (15) and a feather (14) on both sides of a shelve (20) perpendicular to the main axis of the blade. The feather of the blade (14) has an inner surface (17), a back (16), an inlet edge (18) and an outlet edge (19). The model (12) also includes an extension strip (21) adjacent to the outlet edge (19), and a refractory rod (21) embedded in the model (12) and has a corresponding varnished surface (31) between the outlet edge (19) and expansion strip (21) both at the pan (17) and back (16). A partition (24) extends between the shelve (20) and said expansion strip (21) and has a free edge (25) therebetween. The invention also relates to the method of manufacturing a shell mould from the model (12) and casting method using the shell mould.

EFFECT: elimination of grain formation at the intersection of outlet edge or the expansion strip with the blade shelve of the gas turbine engine.

11 cl, 7 dwg, 1 tbl