配方类型:

METALS AND THEIR TREATMENT

配方说明:

Foundry-Core Binder (U.S. Patent 2,861,893)

配方组成:

Water/1.5
Sand (60-120 Mesh)/95.0
Sugar/0.8
Sodium Silicate/2.7

配制方法:

The cores are exposed to carbon dioxide gas for 4 to 5 minutes for hardening. This gives increased compressive strength.