360
K. S. Kulkarni and R. Adivarekar
Fig. 11 Online hairiness
tester
Hairiness Tester
This is an accessory which helps in controlling the singeing operation from quality
as well as utility consumption point of view. It is a combination of a light source and
a monochrome camera. It is fitted at a strategic position on a fabric path where it
can monitor the hairiness of a moving fabric. Here, the light source illuminates the
fabric surface and it is recorded by the camera. Arrangement of light source is done
in such a way that the camera should not record the shadows of protruding fibres, but
only reflected light is measured. The method is known as dark field measurement.
By using signals from camera, PLC can adjust intensity of flame and speed of
machine as well. This will save the utility (gas) as well as improves the production
(Fig. 11).
Exit Section
Spark Extinguishing Unit
The selvedge guiding ribbons are pressed against the burning selvedges and
consequently extinguish them by removal of oxygen (Fig. 12).
Beating Unit
The unit has two rollers equipped with beating segments. They rotate in opposite
direction of the fabric to remove brunt fibers from both fabric surface. Ash from the
brunt fibers is then suck by suction duct and pass through the wet filter. The water
spray nozzles are provided in wet filter to extinguish residual spark, if any.
K. S. Kulkarni and R. Adivarekar
Fig. 11 Online hairiness
tester
Hairiness Tester
This is an accessory which helps in controlling the singeing operation from quality
as well as utility consumption point of view. It is a combination of a light source and
a monochrome camera. It is fitted at a strategic position on a fabric path where it
can monitor the hairiness of a moving fabric. Here, the light source illuminates the
fabric surface and it is recorded by the camera. Arrangement of light source is done
in such a way that the camera should not record the shadows of protruding fibres, but
only reflected light is measured. The method is known as dark field measurement.
By using signals from camera, PLC can adjust intensity of flame and speed of
machine as well. This will save the utility (gas) as well as improves the production
(Fig. 11).
Exit Section
Spark Extinguishing Unit
The selvedge guiding ribbons are pressed against the burning selvedges and
consequently extinguish them by removal of oxygen (Fig. 12).
Beating Unit
The unit has two rollers equipped with beating segments. They rotate in opposite
direction of the fabric to remove brunt fibers from both fabric surface. Ash from the
brunt fibers is then suck by suction duct and pass through the wet filter. The water
spray nozzles are provided in wet filter to extinguish residual spark, if any.