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Sima, 16Y, Polypropylene FDY M.T. Plant, with 2 Barmag ASW 1208 Winders

Description

  1. Overview
    1. Polypropylene FDY M.T. plant model 16Y.
    2. Complete with computer based supervisory system, double set of spinning packs with one type of spinnerets.
    3. Master batches dosing unit.
    4. Chiller and air quenching supply.
    5. 2 Barmag automatic winders ASW 1208.
    6. Consumable items (see list at § 5, point H).
    7. Technical service and training to personnel: electrical and mechanical engineers, process engineer.
    8. Technological know-how transfer.
    9. Set of spare parts (list to be defined later, 2% of main plant value).
    10. Options (quotation on request): laboratory instruments, auxiliary equipment, any other type of spinneret.
  2. General Process And Plant Description
    1. Sima FDY lines, compact and simple, are designed for cost effective production of medium tenacity FDY for textile applications or high tenacity FDY for industrial application.
    2. Uses most up-to-date technologies to meet all quality and efficiency specifications.
    3. Extensive use of advanced and reliable electronic systems for high accuracy in control of all parameters and proper monitoring of equipment behaviour.
    4. Design based on actual user’s needs, strong construction and quality of components result in highly reliable equipment with long working life and low maintenance.
    5. Equipment can be split in the following sections.
  3. Polymer Chip Feeding And Mb/Additive Dosing
    1. Feeding of polymer chips and dosing of master batch / additives are automatically carried out, directly on the operative plant, by computer controlled gravimetric or volumetric units.
    2. Standard FDY plants are equipped with gravimetric units based on the loss-of-weight concept: batch or continuous operating mode are selected according to the dosing concentrations actually needed.
  4. Extrusion
    1. Extruder, fed by the units described in the previous section, is equipped with AC motors that, through reducer, drives extruder screw.
    2. Melt pressure is accurately controlled by means of sophisticated electronic systems which act on inverter controlling extruder screw motor.
  5. Spinning
    1. Spinning heads, insulated in a proper way, are filled with diathermal oil and electrically heated.
    2. Spinning heads house spinning pumps and spinning packs including melt distributors, pressure breakers, filtering screens and spinnerets.
    3. New concept spinning pack allows long life because of annular filtering system.
    4. First quality volumetric metering pumps specially designed for spinning are used; they are driven by synchronous AC motors controlled by inverters.
  6. Filament Quenching
    1. Extruded and spun filaments are quenched in chambers fed by a laminar flow of conditioned air.
    2. Quenching air is treated in suitable units provided with chilled air and fed to each chamber; a laminar flow of air comes out through chamber filters which ensure high distribution uniformity.
  7. Drawing
    1. The section includes all necessary drawing rolls, stabilising rolls and feeding rolls.
    2. The number and type of rolls (cold / induction heated, motorised roll with idle roller / duos) depend on the desired yarn features.
  8. Interlacing
    1. Interlacing is obtained by means of turbulent compressed air in suitable devices (Heberlein).
  9. Winding (Take-Up)
    1. The drawn yarn is wound on cylindrical bobbins by automatic doffing winders.
    2. The standard plant configuration includes one or more 8 bobbin winders.
  10. Controls
    1. Sima uses the most advanced architectures suitable for real industrial environments.
    2. All standard FDY plants are conveniently operated through computer based supervisory systems, where all parameter setting, reading, alarm management, etc. are centralised.
    3. All process entities (temperatures, pressures, speeds) are actually controlled by dedicated intelligent units very close to the field, resulting in fast and highly reliable control loops.
    4. Temperatures and polymer pressures are controlled by digital PID instruments.
    5. Polymer pressure control loops act on extruder motor speeds through control drives.
    6. High-tech digital inverters are used for controlling synchronous AC motors and asynchronous AC motors.
    7. Thanks to the most advanced digital inverters, a very high speed accuracy is achieved.
    8. The performances of asynchronous AC motors controlled by such inverters are comparable to the ones of synchronous AC motors.
    9. Doffing cycles are controlled by dedicated PLC.
    10. Communications between the computers and the many intelligent controllers (thermoregulators, inverters, etc.) are digitally performed by suitable serial lines.
    11. The computer based supervisory systems provide production operators/supervisors and maintenance technicians with a simple/safe interface and tools for an easy plant run.
  11. Design Specifications
    1. Products: PP textile medium tenacity.
    2. Yarn count (den): 300, number of installed yarn: 16, output (kg/h): 90.
    3. Yarn count (den): 450, number of installed yarn: 16, output (kg/h): 120.
    4. Yarn count (den): 600, number of installed yarn: 16, output (kg/h): 120.
    5. Filament count range: typically, 4 – 8 d.p.f.
    6. Filament cross section: delta.
    7. Count range: 200 – 600 den.
    8. These figures are guaranteed if the following conditions are respected: only raw materials suggested by Sima are used, suitable utilities are available, skilled personnel runs production, no colour changes occur, production room temperature 20 to 30 °C, production room relative humidity 60 to 80%.
  12. Plant Features
    1. Extruder: 1.
    2. Screw diameter: 75 mm.
    3. Screw L/D: 30.
    4. Spinning heads: 2.
    5. Spinning pumps: (not specified).