ROVING FRAME OR SPEED FRAME OR SIMPLEX MACHINE:
The roving or simplex frame machine is used to achieve mainly following objectives:
° This sliver is put into large can.
° This sliver first of all passes through separators.
° From this point, sliver goes over the guide roller and then tensioning rollers.
° Now the slivers enter into drafting zone, where it passes between drafting rollers. Generally, a draft of 6–15 draft is employed to the fed sliver. The drafting system attenuates the sliver many times of its original length and reduces the weight per unit length of sliver.
° The output material(roving) after drafting has very poor strength due to low linear density, therefore it needs a little amount of twist to hold the fibres together. The drafted strand of fibres passes through flyer to provide this twist, Usually 30-65 turns per meters are inserted into the roving.
° There are spindles in the flyers on which the twisted roving gets wound.
structure of simplex ( roving) frame and working procedure of simplex ( roving) frame
Process parameters of roving / simplex machine
Precautions of simplex/ roving frame
Testing of yarn count, tensile strength and CSP
Yarn count determination from fabric swatch
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