Chemically Bonded Sand Molding Processes
This section describes the molding processes that use chemical binders mixed with sand to produce a mold. Since their introduction to the foundry, they have gained wide acceptance for the production of molds.
Some chemical binder systems will bond or cure the mold through a chemical reaction established during the sand and binder mixing cycle, while other chemically bonded molding processes may require gassing of the sand mixture, or heat applied to the sand mixture to complete the cure. The simplicity of the chemical system usually makes quality control less complex and results more consistent.
Shell Molding (Organic)
Sodium Silicate CO2 Bonded Molding (Inorganic)
No bake Molding (Chemically Bonded Self-setting Sand Mixtures/Organic)