This adaptation of vacuum forming permits molds to be made out of free-flowing, dry, unbonded sand without using high-pressure squeezing, jolting, slinging or blowing as a means of compaction. The V-process is dimensionally consistent, economical, environmentally and ecologically acceptable, energy thrifty, versatile and clean.

1. Vacuum seal modeling technology (also called V method modeling) is the 1970s Japan invented and the successful development of a special casting method. It is the single dry sand (don’t add water, binder and affix)for sand, with plastic film in the heat with the vent and suction device on the shape of the coated forming, seal sand box, and depend on a pump type internal air, causing casting on internal and external pressure compelling dry sand get tight and needed for the formation of cavity with a physical modeling method.

2. The main process modeling method for film coating, coating, filling sand on tight, the mould and so on ,these processes in vacuum under the support of the complete.

3. Its basic equipment is: take suction filter tube sand box templates, vacuumizing system, plastic film heating, molding and cut off, and earthquake real stations and sand treatment equipment, etc.

4.  Vacuum process molding technology has developed well during the recent years by the higher degree automation, higher quality of casting, high precision, no pollution, saving energy, improving working environment and so on.

5.Vacuum process molding casting surface quality is good, less casting defect, 

easy stripping, high precision casting dimension. Molding sand doesn’t use binder, totally recycling, reducing the mineral cost, so it is applied in more and more fields.