| 摘要 |
PROBLEM TO BE SOLVED: To make jet air current pulse in order to efficiently separate a plurality of kinds of plastics, etc., by a dry specific gravity shape separator using a vibrating screen. SOLUTION: A constant air current is supplied to a conduit pipe 6 by a blower 5 and led from an air generator 13. The air current which vas made to pulsate by opening/closing a solenoid valve 17 is sent. Air currents are combined in the connection part of conduit pipes 6, 8, and the pulsating air current is ejected from the lower part of the vibrating screen 2 through a conduit pipe 7.
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