Diecoats, Lubricants, Sand binders, Coatings (Zircon / Graphite / Ceramic) >> Sand binders >> SANDSIL (SILICATE BASE BINDERS)

THE PRODUCT :
SANDSIL is a Sodium-base binder with adjusted ratio of Na2O : SiO2 for making moulds and cores by Co2 process.

THE PROCESS :
SANDSIL-Co2 process is based on principle of precipitation Silicate Solution by Co2
The reaction proceeds as under :

Na2O 2SiO2 +Co2

Na2 Co3 + 2SiO2 + H2O
(Silica – Gel )
Continued Gassing dehydrates the Gel giving bond
2 Na2HCO3+2SiO2

When the SANDSIL is mixed with Sand, the sand grains are covered with a thin film of SANDSIL, on blowing Co2 gas, the individual Sand grains are cemented to each other at their contact points by Silica –Get to give a firm bond.

MIXING CYCLE :
Dry Silica Sand (AFS55#65) : 100 Parts
SANDSIL : 4 to 5 Parts.
Breakdown Agent : 1.5 to 2 Parts.

Mixing Time :
3 to 4 Minutes. Mixed Sand should be covered with wet cloth for increasing the bench life.

Strength Development (Shear Strength) :
Immediate after gassing : 40 – 60 PSI.
1 Hours : 80 – 100 PSI.
4 Hours : 120 – 140 PSI.
24 Hours : 160 – 180 PSI
Breakdown ( For SANDSIL – 1A/SANDSIL-8/SANDSIL-123) @ 980°C For 5 Minutes. 20-30 PSI.

Self Life :
6 Months from the date of manufacturing.

PACKING :
200 / 250 Kg. Steel Barrel / 60 Kg. P.C.

Note :
Above information is true and accurate based on controlled laboratory testing. However user is responsible for determining suitability for application at their end. No guarantee is implied since the condition in actual differ widely & beyond our control