| 摘要 |
INVENTION: REMOVING VOLATILES FROM PLASTIC MATERIALS DELIVERED TO AN EXTRUSION OR INJECTION MOLDING MACHINE INVENTOR: JARO KOPERNICKY A device is described which eliminates the pre-drying of particulate plastic prior to processing by an extrusion or injection molding machine. A tubular guide member directs particulate plastic under gravity into the feed inlet of the machine. During delivery, the temperature of the particulate plastic is raised with heated air flows to between about 150200.degree.F. Suction is applied to the feed inlet of the machine to remove volatiles (primarily water) released when the temperature of the particulate plastic is increased by contact with the heated barrel and screwdrive of a machine. Temperature and suction controls permit selection of operating temperature and suction levels that ensure removal of volatiles prior to any extensive plasticization and transfer along the barrel which would otherwise preclude proper removal of volatiles. |
