Mould for producing a casting core

A mould assembly for producing a casting core (1) which models coolant ducts (2) and coolant inflows and outflows (3, 4) of a cooling jacket of an electric motor by casting, the mould assembly comprising an external mould (9) and an internal mould (10) completely enclosed by the external mould (9), wherein the external mould (9) forms an outer wall of a core moulding cavity and the internal mould (10) forms an inner wall of the core moulding cavity, wherein the core moulding cavity is configured to be filled with a core material and comprises a substantially cylindrical shape about a central axis (A) of the mould assembly, wherein the internal mould (10) comprises:

• two first mould shells (11) and two second mould shells (13), wherein the two first mould shells and the two second mould shells jointly form the inner wall of the core moulding cavity, wherein the second mould shells (13) each are arranged between the first mould shells (11),
• a first demoulding mechanism arranged between the first mould shells (11) and configured to move the first mould shells (11) toward one another, wherein the first demoulding mechanism comprises a first shell carrier (20) arranged to be longitudinally movable in a direction of the central axis (A), wherein the first shell carrier (20) comprises a first guide (25) and a second guide (25′), wherein one of the two first mould shells (11) is arranged in a displaceable manner on the first guide (25) and the other one of the two first mould shells (11) is arranged in a displaceable manner on the second guide (25′), and wherein the first and second guides each have a longitudinal direction and the longitudinal directions of the first and second guides (25, 25′) converge in a first convergence direction,
• a second demoulding mechanism arranged between the second mould shells (13) and configured to move the second mould shells (13) toward one another, wherein the second demoulding mechanism comprises a second shell carrier (30) arranged to be longitudinally movable in a direction of the central axis (A), wherein the second shell carrier (30) comprises a first guide (35) and a second guide (35′), wherein one of the two second mould shells (13) is arranged in a displaceable manner on the first guide (35) of the second shell carrier (30) and the other one of the two second mould shells (13) is arranged in a displaceable manner on the second guide (35′) of the second shell carrier (30), and wherein the first and second guides (35, 35′) of the second shell carrier (30) each have a longitudinal direction and the longitudinal directions of the first and second guides (35, 35′) of the second shell carrier (30) converge in a second convergence direction, wherein the second shell carrier (30) and the first and second guides (35, 35′) of the second shell carrier (30) are formed together as one part, wherein the first shell carrier (20) is of a two-part construction and comprised of a first carrier portion (20A) and a second carrier portion (20B) arranged in succession in the direction of the central axis.