The Causes of End Down in Ring Spinning

Last updated on September 25th, 2023 at 11:25 pm

The Main Causes of End Down in Ring Frame

Skewer

Bad skewer ends or tips or any other fault which prevent the free rotation of the roving bobbin.

Traverse guide on roving guider

• Traverse guide when collecting fly blocks the regular passage of the roving.
• No middle traverse guide when using double roving.

Roving

• Bad piecing in the roving.
• Stretched roving.
• Irregular roving.
• More twist applied in the roving leading to “shedding through” at the ring.
• Single roving when using double.
• Neps or slubs in the roving.
• More waste in the roving.

Drafting zones

• Incorrect break draft.
• Roller lapping.
• Worn or grooved roller.
• Rust on the bobbin drafting.
• Worn aprons.
• Pneumatic system does not work properly so that the drafted strand of fibres fly entangles with the side end and cause breakage.
• Irregular distribution of draft in the drafting zones.
• Incorrect weight distribution on the top roller.
• Improper weighting of the top roller.
• Incorrect setting of the drafting rollers in relation to the average staple length of fibres under processing.

Lappet rail

• Incorrect setting of the lappet is not at the straight line with the top of the spindle.
• Dwell at each end of the traverse of the lappet rail.
• Starting up of the m/c when the lappet rail is at the top position.

Ring

• Worn ring.
• Grease or gum on and under side of the ring flange.

Traveller

• Heavy or lighter traveller than that required for the count.
• Worn traveller.
• Traveller flying off.
• No traveller clear creating tufts of fibre on the traveller.

Spindle

• Lack of lubrication in the bolster cage or insert.
• Bent spindle is out of centre of the spindle.
• Excessive spindle speed than that requires for the count.
• Obstructed spindle speed by accumulation of fibres beneath the spindle.

Bobbin

• Too larger or smaller diameter of bobbin than that suitable for the count.
• Jumbling bobbin.
• Vibrating bobbin.
• Badly worn bobbin in which yarn tends to catch at the starting up.
• Excessive full bobbin which rub against the ring.

Tapes

• Bad joining of tapes causing spindle vibration.
• Tap ends flying off due to badly sewing.
• Slipping tapes.

Twist

• Use of higher or lower twist multipliers than that requires for the count.

Other causes

• Flying fibres.
• Incorrect relative humidities.
• Wind in the spinning section.
• Bad piecing up of the yarns.
• Shorter staple when used for higher count.
• Immature short or broken fibres in the sliver.
• Weaker fibres.
• Improper lubrication of the m/c.
• Lack of proper cleaning of the m/c floor.
• Irregular maintenance and over haul.

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