Insulating Neck Down Sleeves a smart solution for directional solidification with minimal metal use and clean riser break-off, especially in iron castings.

Key Features:

• Necked Base Geometry
  • Constricted neck controls feeding direction and volume.
  • Promotes directional solidification by feeding only the hot spot
  • Simplifies post-casting operations — clean knock-off at the neck.
• Insulating (Non-Exothermic) Composition:
  • Retains heat using low-conductivity materials.
  • No chemical reaction → zero fumes or reaction by-products.
  • Keeps the feeder metal molten long enough for effective feeding, especially in iron castings with medium cooling rates.