Feeder Sleeves

UNIKON feeder sleeves are produced with different physical
properties and preformed shapes to achieve highest performance in
the casting according to the needs of foundries.All feeder sleeve types have high insulation properties as common features, but different exothermic properties are used in order to achieve the highest performance while casting different alloys.

UNIZ: Feeders with only insulating characteristics are used with
sleeves having large diameters. Also non‐exothermic feeder sleeves
are used on SGI castings where the sleeves are used with a top feeder
and there is a possibility and the risk of deterioration of the graphite
structure.

UNES: Mild exothermic sleeves are used where high exothermic
property is not necessary for feeders that have long solidification
times, thus instead of the exothermic properties, increased insulation
properties are used to increase the feeding performance.

UNEX: High exothermic feeder sleeves, used for small modulus
feeders. It shows high toughness and superior dimensional accuracy
especially for insert applications.
With blind sleeves the outer layer is hard and have very high
dimensional accuracy. The open sleeves on the other hand, have a
especially designed outer layer which has a very rough surface which
prevents the sleeve from floating during casting and moving into the
cast part while solidification takes place.

In the production of UNIKON feeder sleeves, the use of proprietary molds developed and manufactured in-house enables precise adjustments that align with foundry molding practices, thereby increasing production speed for both small and large sleeves.

While small sleeves feature a smooth and rigid exterior, large sleeves are specifically manufactured with a textured outer surface. This external texture not only enhances the sleeve’s insulation properties but also prevents it from slipping after molding or floating during the casting process. Consequently, there is no need for nailing or similar fixation procedures.