ROLLER DRAFTING.

Roller drafting passes a fiber strand through a series of sets of rollers. Each successive set rotates at a surface velocity greater than that of the previous set. Weighting presses the rollers together to prevent slippage. Each two sets of adjacent rollers is a drafting zone. The last drafting zone has the highest draft ratio. The major ..

Short Staple Spinning. Part 3. Textile Processing.

The short staple spinning sector had to modify both its machinery and processing technologies to produce polyester yarns. Optimization of such fiber properties as fineness and length was also crotical to processability. The three major spinning systems (ring, rotor, and air jet spinning) are capable of processing polyester. Fiber preparat..

Spinning Microfibers.

The specific properties of microfibers may allow improvements in yarn quality, but necessitate various adjustments in spinning and spinning preparation conditions, especially in rotor and air jet spinning. In rotor and air jet spinning, the numberof fibers per cross section can be increased to improve yarn quality. The increase in interfi..

COTTON CLEANUP PROBLEM SOLVED.

Stowe Mells solved its cotton flock problem by investing in the Nilfisk GS 82 industrial vacuum with overhead cleaning attachments. Stowe uses the Nilfisk GS 82 to clean its plant twice weekly. The attachments are used to reach all pipes and duct work. The industrial vacuum can be employed during production, which eliminates the down time..

Chemical modifications of ring and rotor spun cotton yarns

This paper discusses the effect of acetylation, benzoylation and cyanoethylation on physical properties, such as tenacity, elongation, bending rigidity, bending hysteresis and fatigue failure, of ring and rotor spun cotton yarns. Acetylation after stretch mercerization in NaOH was found to result in higher strength. The chemical modificat..

OTEMAS `93: automation in spinning

The author describes the levels of automation achieved in spinning preparation and in spinning itself as shown at OTEMAS `93 in Osaka, Japan. The areas touched on include cleaning, carding, combing and ring and rotor spinning. European manufacturers should be encouraged to increase their levels of qutomation in ring spinning plants, for t..

OTEMAS `93: new and further developments in spinning

Textile machinery shown by Rieter Spinning System at OTEMAS `93 in Osaka, Japan, is noted. The exhibition demonstrated the poor state of the market worldwide. Cleaning, carding and drafting systems are briefly examined and ring and rotor spinning machines shown by the company are considered.

OTEMAS `93 survey 1: yarn formation

Developments in yarn formation on show at Otemas 1993 are reviewed in this detailed and informative article. Included in this survey are opening machines, cleaners, carding machines, drawframes, combers, speedframes, ring and rotor spinners, winding machines, clearers, twisting machines, steamers and manufactured fibre extruders.

C.I.M. in spinning: has the future now arrived?

An example of computer integrated manufacturing for total mill contro from Japan is given. Kondo Spinning Co. Ltd (Kondobo) are using a system designed by Murata. Kondobo's spinning mill at Horigane is fully-automated, energy efficient and forms the companies show-piece plant. Murata's Link Coner is at the herat of CIM system.

Anti-wrap device

On a stretch-breaking machine a bracket is installed which holds a chrome-plated bar approximately two inches away from the last top roll of the machine. This prevents flaring of the silver (eg polyester) as it is pulled away by the crimper and effectively prevents wraps on the roll.