Waterglass-process precise casting process

The invention relates to precise casting processes and independently designs a waterglass-process precise casting process with carbon dioxide hardening and high temperature sand strip in order to solve the problem that defects are prone to occur in chemical method hardening sand-strip processes and low-mould waterglass-process casting. The process includes wax preparation, wax mould making, wax mould checking, wax mould group tree, coating preparation, shell making, hot air dewaxing, shell calcination, shell checking, liquid steel pouring, cleaning cutting and castings examination. By means of the waterglass-process precise casting process, device corrosion, environment pollution and worker personal safety potential hazards which are present in traditional chemical method hardening sand strip processes can be solved, meanwhile, qualities of castings surfaces and interior formation can be greatly improved, the finished product rate of castings is increased, the workload of post-treatment is lowered, working environment of a shell making workshop can be improved, production cost is lowered, and large part production capacity of traditional waterglass shells is greatly increased.