Casting device

1. A casting device including a fixed die and a movable die that approaches or separates from the fixed die and forming a cavity to obtain a cylinder block with the fixed die and the movable die, the casting device comprising:

a bore formation core configured to form a cylinder bore in the cylinder block;

a water jacket formation core surrounding the bore formation core from an outer peripheral side and configured to form a water jacket around the cylinder bore;

an actuator configured to displace the bore formation core and the water jacket formation core integrally in a direction of getting close to or being separated from the cavity;

a seal member disposed in a space between the bore formation core and the water jacket formation core, and configured to section the space into a close side part that is close to the cavity and a separation side part that is apart from the cavity; and

a suctioning device configured to suction gas in the close side part through a flow path formed in the bore formation core,

wherein the bore formation core includes a near part that faces the close side part and is always exposed from molten metal in the cavity, a far part that faces the separation side part, and a bore formation part that protrudes from the near part toward the cavity and is embedded in the molten metal in the cavity; and

the flow path includes a first opening formed on an outer surface of the near part and a second opening formed on an outer surface of the far part and connected to the suctioning device, and the flow path exists above a virtual axial line that passes a center of the bore formation core and extends along a longitudinal direction of the bore formation core when the bore formation core is viewed from a side.

2. The casting device according to claim 1 , wherein the first opening is formed near the seal member.

3. The casting device according to claim 1 , further comprising a fluid supply device configured to supply a blow fluid from the separation side part to the close side part through the flow path.

4. The casting device according to claim 1 , wherein the first opening is formed on a side wall of the near part, the flow path includes an inclined path from inside of the bore formation core to the first opening, and the inclined path is inclined in a direction from the far part to the near part.

5. The casting device according to claim 1 , comprising a plurality of the bore formation cores and the water jacket formation cores, wherein the adjacent bore formation cores form a V shape.

6. The casting device according to claim 5 , wherein the adjacent bore formation cores are arranged in an up-down direction.

7. The casting device according to claim 6 , wherein the far part of the bore formation core has larger diameter than the near part, a lower part of the far part is in contact with an inner wall of the water jacket formation core, an upper part of the far part is apart from the inner wall of the water jacket formation core, and a side wall of the near part is apart from the inner wall of the water jacket formation core along an entire circumference.

8. The casting device according to claim 7 , wherein a separation distance between a lower part of the near part and the inner wall of the water jacket formation core is smaller than a separation distance between an upper part of the near part and the inner wall of the water jacket formation core.

9. The casting device according to claim 8 , wherein the separation distance between the upper part of the near part and the inner wall of the water jacket formation core is 50 μm or less.