FLEXIBLE PRODUCTION LINE FOR 3000T/A 3 D CRIMPED HOLLOW POLYESTER STAPLE

Product Overview

Description

 1.       General  (spinning line)

The line is used to produce hollow polyester fibers by means of drying, melting, filtering, spinning as well as quenching, oiling, feeding and filling technology with annual output of 7,500 tons.

The line consists of main production line, auxiliary production units and general facilities.

 

1.1   Main production line for spinning ,consisting of

Spinning machine, taking-up machine, capstan unit, feeding machine, doffing machine and HTM system.

 

1.2  Auxiliary production units, including

Dissembling, cleaning, assembling, preheating, ultrasonic cleaning of spin pack, testing of spinneret and preparation of sand, preparation of finish oil, air conditioning and ventilation, physical and chemical detection.

1.3      General facilities (Supplied by the Buyer), including Electric substation,Water supply, compressed air system and others.

 

2.  Technology description

 

2.1  Spinning and taking-up

The material is carried into a metering and mixing device via a bin after passing through continuous dryers. Then they go through extruders to become melt, which comes out of extruders and then goes into distributing pipes. The two static mixers ensure that there is no dead space inside the melt distributing pipes and that even temperature distribution of the melt is possible.

    Then the melt goes into spin beams. The specially-designed distributing pipes inside the spin beams guarantee uniform dwell time for the melt to reach each spin position.

    The pin valve fixed before each spin position ensures separate opening and closing of each spin position.

    The melt then flows into spin pack at uniform flow rate after passing through distributing pipes, pin valves and the metering pump driven by inverter-controlled motor.

    There are filtering sieve and filtering sand inside the spin pack to remove the impurities from the melt so that the melt becomes trickling when extruded from the microholes of the spinneret.

    The melt piping system and the spin beams are heated by HTM vapor produced by a HTM evaporator and the specially-designed vapor distributing system ensures uniform temperature for each spinneret.

    There are 2 spin beams for the whole line, each having 6 spin positions so that altogether there are 12 spin positions, with each spin position fixed with a pin valve, a metering pump, a driving system and a spinning pack.

The trickling extruded passes through a quenching chamber where it is solidified by laminar cool air controlled uniformly and then is carried to the taking-up panel via a spinning duct.

    On the taking-up panel, the tow from each spinning position is finished with spinning oily mixture controlled by a static inverter, and then guided by a return roll. Finally tows from 12 spinning positions become a bundle of tows, which is drawn by a 6-roll draw-off machine controlled by inverters and enters the feed wheel to lay uniformly in the fiber can on the traverse mechanism.

    The aspirator gun is used for the string-up of tows.

    The oily mixture is supplied continuously to the finish oil disc of the take-up machine by means of an oil storage tank, an oil supply tank, an oil collecting tank and an oil input pump.

    Automatic can-exchanging function is available for the traverse mechanism, so that periodic can-exchanging can be realized automatically when the can is full of tows. The full can is transported to the tow collecting position by the carrier vehicle.

 

1. Design basis

1.1   Annual output:

7500t hollow polyester staple (based on finished fiber of 6.67 dtex)

1.2   Daily output:

24.5t hollow polyester staple (based on finished fiber of 6.67 dtex)

1.3 Titer of the finished fiber: 6.67~16.7 dtex

1.4 Spinning positions: 12

Spinning pitch: 650 mm

1.5 Specifications for spinneret: diameter 328mm

1.6 Specification for metering pump: 100cc/r

1.7 Spinning speed:

Mechanical speed: 500-1500m/min

Processing speed: 500-1350m/min

1.8   Size of fiber cans (L×W×H): 1500mm×1500mm×1800mm

 

     DESCRIPTION OF PROCESSING LINE

1.1 Tri-dimensional hollow polyester staple.

Can creel → upper godet frame → lower godet frame →7-roll godet machine→oil-impregnated vat → 1^st draw stand → bath drawing  box → 2^nd draw stand →steam drawing box → 3^rd draw stand →stacker → tension frame→ steam preheating box → crimper →transporting conveyer→godet frame → silicon oiling machine → draw-off & tension frame → tow cutter → piddler → tensionless heat-setting dryer →air transport system →baler

 

1.    Main specifications

1.1  Output capacity

Annual output: Tri-dimensional hollow polyester staple: 7500 t/a (based on 6.67dtex)

 Daily output:   Tri-dimensional hollow polyester staple: 28t/d (based on 6.67dtex)

1.2 Max. draft denier: 150×10⁴ dtex

1.3 Number of cans collected: 24

1.4 Max. mechanical speed: 200m/min ( based on the third draw stand )

1.5 Max. processing speed: 180 m/min

1.6 Package weight: 200 kg

1.7 Specification of fiber can:1500×1500×1800mm