Highly Exothermic Neck down Sleeves commonly used in foundries for precision feeding in castings

Key Features:

• Neckdown Geometry
  • The reduced neck diameter creates a thermal choke point, encouraging directional solidification.
  • Promotes cleaner break-off and less cutting/grinding post-casting.
  • Improves feeding control and efficiency by concentrating molten metal delivery to critical sections of the casting.
• Highly Exothermic Material:
  • Initiates a vigorous heat-producing reaction upon contact with molten metal.
  • Delays solidification in the riser, ensuring adequate feeding time to compensate for shrinkage in the mold
• Shape: Usually cylindrical above the neck, with a tapered lower section that inserts into the mold cavity.