Development of an Auto-Doffer for Covering Machines. Part 7: Success Improvement and Air-Power Saving on the Yarn Drawing-In Based on Analysis of Yarn Running Behavior.

Researchers attempted to improve the drawing-in operation of the automatic doffer on a covering machine. A reduction in air consumption correlated with a savings in energy consumption. Changes in supply pressures at the injector and ejector, yarn feed speeds, and working time allowed researchers to measure such forces as air drag and obse..

EXPANDING ROLE OF AUTOMATION IN COTTON SPINNING

Sacolwell's CAS and Platt's SAS automated spinning systems are discussed. CAS is a complete system ranging from bale opening to cone winding and automatic waste handling. Platt's SAS system is a partially automated or semi-automated system that uses special drafting and sliver assembly techniques to reduce the number of manual operations ..

ITMA 1991--REVIEW OF YARN FORMING MACHINERY

Equipment for yarn spinning mills at ITMA1991 featured increased productivity and improved product quality. Attempts at automation were evident in processes from the blowroom to spinning. Equipment by major manufacturers for carding, combing, drawing, ring spinning, and rotor spinning is described.

Improving Yarn Qaulity

Improving the relatively low quality of yarn from India requires optimizing process parameters in the blowroom; during carding, combing, and drawing; and at the speed frame and ring frame. Conditioning cotton fibers with methyl tro-oxol oil for 24 hours prior to spinning improves cotton fiber bending properties and reduces fly, lapping, a..

Rieter Equipped to Face Ptential Markets

Rieter Textile Systems is the leading supplier of spinning mills, manufacturing equipment for the entire process, from bale to textile end product. Its new products include the Com4 yarn spinning process, the BT 903 rotor spinning machine, and the PATHFINDER modular platform for a complete bulk continuous filament yarn manufacturing syste..

Neuenhauser: Travelling Cleaner

Neuenhauser Maschinenbau GmbH & Company's Top Duct 2 has a new track system for its traveling cleaner. The tracks and suction channel form an integrated system. A new drive guarantees smooth running of the traveling cleaner. The low overall height allows applications with narrower space requirements. Other developments at Neuenhauser incl..

Spinning Process Control

Process control has a significant impact on the quality of end products from yarn spinning mills. Such systems increase the output per spinning position and increase productivity rates. In the blowroom, process control optimizes yarn fealization and decreases lint waste and nep formation. During carding, process control reduces trash and ..

EFFECT OF A VARIABLE SOLUTE DISTRIBUTION COEFFICIENT ON MASS SEPARATION IN HOLLOW FIBERS.

The effect of a variable solute distribution coefficient on mass transfer in a hollow fiber separator is described. This problem occurs when liquid membranes are used in porous hollow fibers for mass separation. An example is the removal of toxic phenolic solutes from water. A variable solute distribution coefficient in the liquid membran..

ROLE OF SODUM TRANSPORT IN THE ACTIVATION OF ALVEOLAR MACROPHAGE ARACHIDONIC ACID METABOLISM INDUCED BY TANNIN.

Previous studies have indicated that condensed tannin isolated from cotton bracts is a potent agonist for the release of arachidonic acid (AA) from membrane phospholipids of rabbit alveolar macrophages. Activation of AA release by most agonists appears to require the transport of sodium from the cell exterior into the cytoplasm. When rabb..

TANNIN PROMOTES THE ACCUMULATION OF FREE FATTY ACIDS IN ALVELOAR MACROPHAGES BY INHIBITING THEIR REINCORPORATION INTO MEMBRANE PHOSPHOLIPIDS.

Inhalation of cotton bract tannin induces acute pulmonary inflammation, which includes the release of arachlonic acid metabolites. Tannin causes the accumulation of free fatty acids from rabbit resident alveolar macrophages and inhibits their reincorporation into membrane phospholipids. After 30 minutes of stiumulation with tannin, incorp..