Techno-Economic Comparison of TFO Twister with Ring Doubler.

An overview of the technological ad economic characteristics of different twisting systems describes the performance, productivity, initial investment, power consumption, wages, and conversion costs per kilogram of two for one twisting and ring doubler/ring twisting machines. Two for one twisting offers fewer knots per kilogram of yarn, e..

Influence of Twist on Properties of Flat Yarn.

A study of the influence of twisting on the properties of flat polyester yarns used a TFO twisting machine to twist different varieties of flat polyester filament yarns. Increasing twist increased yarn denier. The number of filaments did not affect the rat of increase in denier. Increasing twist increased yarn contraction. Yarn tenacity i..

Compact Spinning for Wool.

Congnetex and Rieter's IDEA COM4 WOOL manufacturing line results in tight, smooth, strong yarns. The IDEA spinning machine and elastic control rolls with a slant axis eliminate tension on fibers. The resultant COM4 WOOL yarn have reduced hairiness; improved resistance, evenness, and elongation; and minimal pilling. The IDEA COM4 WOOL spin..

2nd Generation of ComforSpin Compact Yarns.

COM4 yarns are stronger, have fewer neps, and are less hairy than conventional ring spun yarns. Rieter's ComforSpin compact yarn spinning machine manufactures COM4 yarns that reduce size consumption by 50 percent and raw materials consumption by 8-16 percent. Using COM4 yarns permits increases in weft insertion speed and reductions in loo..

Tribological Aspect of Dynamic Deviations in Ring-Frame Twisting System due to Dynamic Malalignment of Spindle.

A research project addressed the dynamic disturbances and tribology resulting from the twisting system of a worsted ring spinning machine due to faulty spindle rotation. Researchers determined the forces for a three contact interaction between a J steel traveler and taper ring that acted on the traveler and yarn when the spindle axis devi..

Yarn Quality Improvement through Application of Air Current in Ring Spinning.

A study applied air to the fibrous web in the drafting zone prior to delivery to the front roll nip of a ring spinning machine to reduce yarn hairiness. Researchers introduced the air flow through two rows of angular perforations in the bottom apron in the front zone. The air flow reduced hairiness by 18 percent in 60s carded cotton yarns..

Analysis of Principle and Technical Features of Compacting in Spinning.

Compact spinning reduces yarn hairiness by narrowing the fleece triangles between the final draft and twisting zone. In addition to less hairiness, compact spun yarns offer superior strength, elongation, and luster; better process ability; and the elimination of several yarn manufacturing process. Fabrics manufactured from compact spun ya..

Nonlinear Dynamics of High Speed Transport for Staple Yarns.

A study developed computer models of high speed systems that transport nonuniform yarns, such as winding and unwinding systems for staple fiber yarns. Researchers focused on yarns with significant nonuniformity and yarn structures resulting from ring, open end, and vortex spinning methods. The models facilitate the use of computer aided d..

Analysis and Enhancement of Carding and Spinning.

Ongoing research on a novel, combined carding and spinning machine for staple yarn manufacture focuses on analyzing and regulating fiber transport to the spinning heads to achieve reliable operation and product uniformity, as well as improving carded web uniformity and fiber mobility in the machine transverse direction. The novel system c..

ITMA Asia Survey 1: Yarn Formation.

An overview of yarn forming machinery at ITMA Asia 2001 focuses on manmade fiber manufacturing, testing machines, monitoring systems, drawing machines, texturing machines, ring spinning machines, rotor spinning machines, winding machines, and twisting machines. Barmag's AFK2 draw texturing machine achieves speeds of up to 1,200 millimeter..