Shutter sleeves

Sleeves are pre-made forms of auxiliary feedings, which by delaying the freezing time, lead to an increase in feeding efficiency compared to moss feedings and termite feedings. The use of auxiliary feeds increases the casting efficiency of parts, reduces cleaning costs, eliminates shrinkage defects, etc.

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They are used for the construction of large feeders, in 3 cm thick slabs, the modulus expansion factor is 1.2 and in 6 cm thickness, the modulus expansion factor is 1.3 times the shape modulus.