PowerPoint Presentation

SUBJECTAdvanced Spinning Techniques (YM-4013) 2(2-0)by Uzair Sb TWIST LESS & SELF - TWIST YARNS

GROUP MEMBERS

Syed Abdullah Hasan 11-NTU-037Abdul Rehman Akbar 11-NTU-002Mian M. Arslan 11-NTU-015

Haseeb Ahmad 11-NTU-009Zaheer Abbas 11-NTU-0423Definition:

This process of spinning involves the arrangement of fibres parallel to each other, adhering them together with the aid of a bonding agent TWIST-LESS SPINNINGElimination of twisting portions

Coating of the bonding agent

TWISTLESS SPINNINGOpening of fibers

Sliver formation

Roving formation

Wetted The roving and drawn out.PROCESS OF TWISTLESS SPINNINGThe drawn out slivers are sprayed with sizing (bonding agent) and then wound on packages.

The slivers with the bonding agent are steamed to bond together. These slivers are used in the fabric construction.

PROCESS OF TWISTLESS SPINNING To make soft towel Uses of Twist less spun yarn

SELF-TWIST SPINNINGDEFINITIONThis process of spinning involves inserting alternating S and Z twist in the fibre strands that come from the drafting system. This is done by passing the slivers between the draft rollers which rotate along the axes as they rotate to deliver the threads SELF-TWIST SPINNINGSELF-TWIST SPINNING

REPCO SPINNING MACHINE is used to make self twist spun yarn SELF-TWIST SPINNING

Creel

Double apron drafting arrangement

Friction assembly

Winding devicePARTS OF MACHINESPECIFICATION OF REPCO MACHINEDelivery speed

up to 300 m/min

Raw material

wool and synthetic fibers

Count range

Ne 9/2-45/2; 13-65 tex x 2

Feedstock

roving

Type of yarn

two-fold yarn

Yarn characteristics

full, round, twist variations

Pairs of roving are fed onto the drafting rollers in such a way that the last set reciprocates axially.

The roving slivers are drawn out on succession of these drafting rollers. The action of the drafting rollers causes a rolling action of the strands as they emerge.PROCESS OF REPCO MACHINEThe side ways movement of the roller causes the stands to wrap around each other.

After the rollers complete their side ways motion in one direction, the movement is then shifted in the opposite direction.

The resultant yarn therefore has alternating sections of S and Z twist.

PROCESS OF REPCO MACHINE

low energy consumption,

low space requirement,

low personnel demand,

low-noise process

ADVANTAGES OF REPCO MACHINEUSED IN KNITTWARE FABRICSUSES OF SELF TWIST YARN

USES OF SELF TWIST YARN

USED FOR MAKING SOCKS , SWEATERS AND OTHER WINTER CLOTHES

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