Textile Engineering

1. Working principle of BDT: In this zone, basic function is to open the fiber from
the bale where fibers are at very compressed and disoriented state. The opening
device has to penetrate into the bale and pick up the tuft of fiber during releasing
from different bales simultaneously. The size of fiber package is converted from
200 kg to 10 gm/tuft in this zone. The machine moves to cover maximum bales.
Generally roller with toothed disc is used for opening device. No beating action but
picking is performed here.
As shown in figure, rotating opening rollers fitted with toothed discs are made to
traversea line of preassembled cotton bales, the toothed discs plucking tufts from
each bale as they move frombale to bale. The toothed discs give a gentle opening
to prevent or minimize the fiber breakage while producing smaller tuft sizes at
higher production rates than the mixing bale opener.
Technical data:
Traverse speed : 10~18 m/min
Speed of take-off roller : 1400~1800 rpm
Nominal take–off depth : 2.5~3.5 mm