SPINNING OF 100 PERCENT PINEAPPLE LEAF FIBERS IN COTTON SPINNING SYSTEM.

Pineapple leaf fibers were spun in a cotton spinning system with minor modifications. The raw material was first decorticated and chemically degummed. Prior to carding on SITRA's Lap Convertor, the fibers were opened in two passes through a Shirley opener. Because the absence of interfiber cohesion prevented the formation of card web, a w..

AUTOMATION -- AN EVOLUTION.

Improving automation in yarn manufacturing requires the shortening of processes, monitoring breakdowns, and using micro-processor controls. Information systems, such as Truetzschler's Carding Information System and Centralinformator, a process guiding system, are examples of improvements in automation that will be displayed at ITMA 1991. ..

CLEARING EFFICIENCY OF DIFFERENT YARN CLEARERS.

The clearing efficiency of mechanical and electronic yarn clearers was evaluated. Oscillating serrated blade, fixed blade, and electronic Uster clearers were tested with P/V and P/C yarns. The knot factor and number of objectionable faults were calculated for each test. The clearing efficiency of the electronic clearer was the best. The n..

GERMAN SPINNERS WANT FLEXIBILITY.

German spinning mills are looking for flexible machinery at the upcoming ITMA to offset the threat of low cost imports of yarns and fabrics. Cotton yarns from India, Pakistan, Brazil, and Turkey, and synthetic yarns from Taiwan, South Korea, and Malaysia are competing heavily with German yarns. As a result of the strong competition and lo..

VELOCITY DISTRIBUTION OF RUNNING VISCOELASTIC YARN SUBJECTED TO DRAWING.

A one-dimensional constitutive equation of the integral type described in a convected coordinate system was used to obtain formulas for the velocity distribution, tension, and running time of viscoelastic yarn that runs between the feed-roller and take-up roller in a steady state. The formulas were expressed simply by the creep compliance..

TRENDS IN SPINNING DEVELOPMENT.

Worldwide trends in spinning technology and the spinning industry are described. Presently installed spinning capacity and recently delivered spinning machines in Eastern Europe, Western Europe, Asia, North America, and Africa are discussed. The future of mule, ring, rotor, air-jet, friction, self-twist, and wrap spinning technologies is ..

AUTOMATIC SPINNING CAN TRANSPORT.

Innovatex's Pinny system automatically transports spinning cans on slide beams by pins fixed to the thrust and swing rod. Exchanges of empty and full cans can occur between carding, drawing, combing, roving, and rotor spinning machines. The pacemaker is the drive attached at both ends of a can track. Because the thrust and swing rods oper..

RIETER INTRODUCES NEW CONCEPTS, IMPROVED LINES IN ALL SEGMENTS.

Innovations and updates displayed by Rieter at ITMA 1991 are reviewed. Rieter showed the completely redesigned UNIfloc automatic bale opening machine. The new UNIfloc A 1/3 is capable of being integrated into a newly designed material control system. Rieter also showed the UNIclean B 1 cleaning unit, the Rieter Card C4/1, TREX carding ele..

MURATA CREATES COMPUTER INTEGRATED MANUFACTURING FACTORY.

Murata's ITMA 1991 stand highlighted a CIM yarn factory of the future and an automated mill for manmade fibers. Murata also showed the No. 377 two-for-one twister, the No. 881MTS for producing 100 percent cotton yarn, the No. 7-V bobbin-tray type linkage system, the No. 7-V link coner, the No. 07A cone-to-cone handing robot, and the No. 2..

AUTOMATIC CHOICE.

Marzoli and U.T.I.T develop and manufacture automated materials handling equipment for spinning mills. Marzoli-U.T.I.T. products include the LTX 4 lap transfer, which links the sliver drawing winder to combers; the CMB automatic monorail circuit, which serves as buffer storage for roving packages and empty tubes on the roving frames; and ..