Metal casting process in green and shapes and blocking device for the hot channels

摘要

The method involves simultaneously filling the mold (1) through its bottom part by means of the main runner (3) while the molten metal (2) rises through a secondary channel (6) branching off from the beginning of the runner (3), said molten metal (2) rising in the secondary channel (6) in the same way as in the mold (1) in such a way that once the mold is filled, the main runner (3) is blocked and feeding of the secondary channel (6) is continued until it overflows and the corresponding sinkhead (5) located above the mold (1) is filled, the secondary channel (6) communicating with the top part of said sinkhead (5) so that once it is filled, the secondary channel (6) is blocked. This makes it possible for the more liquid portion of the metal to reach the top area of the mold (1), post-feeding to the latter being possible to compensate for metal contraction during cooling. The invention also relates to the device (7) that blocks the main runner (3) and the secondary channel (6), both blocking devices (7) being identical and independent.