Hi Jens,Die casting is the last solution.. There is 2 difference die casting: Low pressure die casting with air pressure or high die casting with piston.
It must be ejectors to reduce air pressure inside when the molten meatai is pressed into the mould. Mould an be made of steel or similiar material. The ejectors are smaller than you find in sand casting.Hi Jens,
at the upper picture, there are no ejectors where the air can leave. Does this require a porous mould where the air can get through?