Improvement of Secondary Pneumatic Separating Floating Chamber in ZJ17 Cigarette Maker

The rejects from the secondary pneumatic separating floating chamber in ZJ17 cigarette maker contain some tobacco shreds,which results in higher tobacco consumption. The higher sliver content in tobacco rod causes larger cigarette weight deviation and the sliver sometimes may extrude through cigarette paper. Therefore,the secondary pneumatic separating floating chamber was improved. For increasing its volume,the upper part of the chamber was changed from a straight shape into an inclined shape. Two arc guide plates were separately embedded in two pairs of blocking blocks to form an S-shape air passage between the blocks,the air velocities were varied as the change of cross-sectional area of the passage to allow a thorough separation. The application results showed that: while keeping the reject volume unchanged,its tobacco shred content decreased from 17% to 5% and the defective cigarettes with holes punctured by sliver decreased from 0.2% to 0.01%;the deviation of individual cigarette weight was controlled within 23 mg;and tobacco consumption per 50000 cigarettes reduced from 38.5 to around 36.4 kg.