Yarn Spinning - Draw Frame.Must See High Speed Video.

The Draw Frame in a Textile Mill is unavoidable in yarn spinning as fibers need to be kept side by side termed as parallization of fibers in textile technology.This is done as we see that most of the fibers at carding stage are drawn so fast that there is little or no fiber parallelization.In draw frame this is achieved in two stages.This is termed as First Passage and second Passage drawing.Six slivers or eight slivers are fed to four or five pairs of rollers in drawing them evenly in stages from the first pair of rollers to second and from second to third and from third to front pairs of rollers.The parallelization is achieved by the rollers by drawing let's say one inch length of eight slivers from carding weighing say one gram each which will be eight grams per one inch,this is drawn to eight inches only to make one gram per inch there by keeping the weight per yard constant maintaining the standard deviation as per standards.These slivers as you see in the pictures are deposited in to plastic cans of 48 inches in diameter which are again fed to a similar Draw Frame again to obtain the desired parallelization.If you hold a one yard length of card sliver in one hand and one yard of the Second Passage Draw Frame sliver in other hand and shake them both the Second Draw Frame sliver falls off in to pieces on the floor.This is on account of the entangled fibers holding together in card sliver and the Second Passage Sliver fibers being very parallel lets the fibers slide and due to gravity it just let's go the neighbour fiber and falls.This is electronically controlled and monitored and randomly checked for evenness in a tester with electronic sensors,or it may be continuously monitored all the time.There are standards set for various parameters which are technical in nature and of no significance to readers of how spinning of yarn is done on a machine in a textile Mill.The number of such machines in a Textile mill depends on the production that the mill is programed to produce in a set number of hours per day of working.There are standards in each case set for the mills.Any deviation will be a loss to the mills by way of under utilization or pile up of processed stock from the previous carding machine held up,both resulting in loss to the mills.This however does not often as planners give allowance n such circumstances.This department is termed as Draw Frame Section.The next is the Simplex Machines termed as Fly Frame Department.