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High-intensity mixers provide controlled, rapid and homogeneous mixing of PVC
resin, plasticizers, stabilizers, lubricants, and pigments, etc. The mixing action is accomplished by high-energy converting
impellers mounted on a single shaft in a dust tight vertical-mixing cylinder.
The development of a complete vortex-open
from the top of the mixing cylinder to the bottom of the shell-assures uniform dispersion of plasticizers and stabilizers
throughout the resin powder mass while concurrently assuring intensive impingement of dry additives and lubricants upon the
resin particle surface.
The main use for the K cooler series is for the purpose of cooling PVC compounds
after they have been through a cycle in one of our W series high-intensity compounding cycles. Heat generated during the compounding
cycle must be removed to control the heat history of the dry blend and improve its flow characteristics. Littleford PVC coolers
perform the cooling process faster than the hot mixing cycle thus providing balanced high capacity mixing-cooling units.
These
large-capacity, fast acting coolers have been developed mainly to cool and blend PVC compounds. Typical compound batches are
cooled from 240 to 120 degrees in the same time span it take to compound a batch of the same size.
Cooling is accomplished
by specialized mixing tools mounted on a horizontal shaft. These create a unique fluidized bed action, which constantly exposes
new surfaces of the compound to the heat exchange surfaces, and develop a high rate of heat transfer. The same fluidizing
action quickly empties the cooler through a central bottom discharge port.
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