Foundry Auxiliary Materials for Ferrous Foundry
Foundry Coatings
Riser Sleeve
Riser sleeves, also known as feed heads, or riser insulators, are used during casting to compensate for the shrinkage that occurs when molten metal solidifies. Without proper feeding, shrinkage cavities or other defects can occur.
By placing a riser on the top or side of a casting, molten metal from the riser flows into the casting as it solidifies, preventing shrinkage defects.
The use of riser sleeves offers several advantages: due to their excellent insulation and exothermic effects, smaller risers can be designed, making product design easier and reducing finishing costs, remelting costs, and defect rates caused by shrinkage cavities.
Riser sleeves are available in various shapes — circular, oval, easy-cut (neck-down type), blind sleeves, and board types — and in a wide range of sizes.
Exothermic and Insulating Compounds