Stabilizer for green sand mold

Abstract

A stabilizer for green sand mold includes a binding agent and an additive. Therein, the binding agent is a derivative of phenol, bonding with a variety of functional groups substituting hydrogen atoms, and present in an amount of 75 wt % to 85 wt % of the stabilizer. The additive contains a variety of trace elements. The binding agent and the additive are added in a weight ratio of 4:1, thereby improving the physical properties of the green sand mold and thus acquiring a reference for sand blending, molding and defects analyzing of castings.

What is claimed is: 
     
         1 . A stabilizer for green sand mold
 a binding agent, which is a derivative of phenol, bonding with a variety of functional groups substituting hydrogen atoms, and present in an amount of 75 wt % to 85 wt % of the stabilizer; and   an additive, comprising a plurality of trace elements;   wherein the binding agent and the additive are present in a weight ratio of 4:1.   
     
     
         2 . The stabilizer of  claim 1 , wherein the trace elements comprises sulfur (S), magnesium (Mg), sodium (Na), and calcium (Ca). 
     
     
         3 . The stabilizer of  claim 1 , wherein the functional groups comprises ketone group, aldehyde group, alicyclic group, primary alcohol group, secondary alcohol group, and alkenyl group. 
     
     
         4 . The stabilizer of  claim 1 , wherein the binding agent is present in an amount of 81 wt % of the stabilizer. 
     
     
         5 . The stabilizer of  claim 1 , wherein the additive is present in an amount of 19 wt % of the stabilizer. 
     
     
         6 . The stabilizer of  claim 1 , wherein the binding agent and the additive are mixed and present as a solute of brown powder. 
     
     
         7 . The stabilizer of  claim 6 , wherein the solute has a volume density ranging from 25 g/cm 3  to 30 g/cm 3 . 
     
     
         8 . The stabilizer of  claim 6 , wherein the solute has a pH value ranging from 5 to 6. 
     
     
         9 . The stabilizer of  claim 6 , wherein the solute has a solubility of 92% in cold water