The next three steps in the V-process are:

5.  The vacuum is released from the pattern carrier and the  vacuum-constrained mold is stripped off  the pattern. 

6.  The two mold halves (cope and drag) are joined together to form the completed plastic lined mold cavity.  The vacuum is maintained in the flasks during molten metal pouring. 

7.  After metal pouring and cooling, the vacuum on the mold is released.