Sand Specification

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Sand Specification

This is a range of a Resin Coated Sand used in production of cores & moulds by shell process with superb hot strength. It is prepared from high grade Silica sand by pre-coating it with phenol - formaldehyde (PF) resin and catalyst. This resin - coated sand is very smooth, free flowing and dry with good resistance to moisture.

Our Resin Coated Sand Quality Testing Report:

SL No. %age of Resin CTS (psi) (Cold Tensile Strength) HTS (psi) (Hot Tensile Strength) Gas Evolution (cc/gm) Stick Point AFS
A 2.5 175-185 150-160 (10-11) 8.5 100±1 60-65
B 3 225-235 200-210 (14-15) 9.5 100±1 60-65
C 3.3 260-270 235-245 (16-17) 10.2 100±1 60-65
D 3.6 280-290 245+255 (17-18) 11.0 100±1 60-65
E 4 305-315 280-290 (19-20) 12.2 100±1 60-65
F 4.5 345-355 320-330 (22-23) 14.1 100±1 60-65
G 5 445-455 410-430 (28-30) 16.2 100±1 60-65
H 5.5 555-565 500-520 (35-36) 18.1 100±1 60-65

Shell Sand Advantages :

  • Extremely flow able, to produce cores / moulds of greater density and compacted ones. Cores and Moulds are less prone to erosion by Metal which reduces Non-metallic inclusions.
  • Shell Sands Cores and Moulds have hollow characteristics results in significantly light weight for handling and lowest cost production of castings. Deep drawn patterns with tapers of 0.5 to 3 degree can be produced by Shell Process
  • High 'Out OF BOX ' strengths of cores and moulds yield castings with high precise dimensional tolerances which lead to reduction in machining allowances, fettling and finishing cost.
  • Shell Process renders elimination of refractory coatings
  • Shell Sand Cores/Moulds remains usable indefinitely and are unaffected by humidity and resistance to moisture pickup.
  • Shell Sands are exceptionally resistance to damage during handling and storing.
  • Shell Sands have the ability to make excellent casting time after time, simple to process, operated with unskilled labour.
  • Shell Process leads to low capital investment for core/moulds making equipments.
  • Shell Process yields less sand handling and less sand consumption per unit casting to be produced.