Some new V process forming proposed by foreign and domestic specialists are introduced
including softening film
cellubse solution forming
resin bonded shell
rubbery film forming
compound forming etc. Some techniques to improve the mechanical properties of V process castings
such as surface alloying
inoculant addition to the coating are presented. The penetration will appear unless appropriate measure is adopted. The penetration origination and recently developed measure against the penetration are described.