Classifications

• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/08—Melt spinning methods
  • D01D5/098—Melt spinning methods with simultaneous stretching
• • D—TEXTILES; PAPER
  • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
  • D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
  • D01D5/00—Formation of filaments, threads, or the like
  • D01D5/08—Melt spinning methods
  • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
  • D01D5/092—Cooling filaments, threads or the like, leaving the spinnerettes in shafts or chimneys

Definitions

• the invention relates to a device for melt spinning at take-off speeds above 5000 m / min, consisting of a spinning block, with a spinneret pack and a thread suction nozzle and a filament produced by the method.
• Thread extraction nozzles for thread cooling in melt spinning at speeds above 5000 m / min are known. On the one hand, they suck in the threads and, on the other hand, they serve to supply the threads with a cooling gas parallel to them.
• such a nozzle is used in connection with a heating chamber, the heating chamber being mounted directly under the spinning block.
• EP-A-0 244 217 also describes the use of such a nozzle for the same purpose in connection with a Venturi nozzle operated with a hot gas.
• the Venturi nozzle is also located directly under the spinning block.
• Both the heating chamber and the hot gas-powered Venturi nozzle serve, among other things, to improve spinning and thread properties. As far as the thread properties are concerned, these have a positive influence on the dyeability.
• the thread suction nozzle for thread cooling is located between 50 and 600 mm below it in the case of the heating chamber and at a sufficient distance below it in the case of the Venturi nozzle that the air escaping there does not impair the operation of the same. The threads get in there as an open bundle and are still quite fluid on their way there due to the delayed thread cooling, i.e. little solidified.
• the object of the invention is to provide a device which allows the titer regularity and the strength of a very quickly spun filament to be improved.
• Another task is to reduce the energy-intensive operation of a heating chamber or the likewise energy-intensive specific hot air consumption.
• the object is achieved in a device according to claim 1, which is characterized in that a spinning chamber is arranged between the spinneret pack and the thread suction nozzle. Due to the arrangement according to the invention, a suppression is created in the spinning chamber, which specifically draws in cooling air from the environment and which surprisingly achieves an excellent titer regularity along the resulting thread.
• the spinning chamber is attached in a gas-tight manner with its inlet opening on the spinning block and with its outlet opening on the thread suction nozzle.
• the attachment is carried out in a known manner and using sealing material.
• the formation of the bottom of the spinning chamber into a funnel has advantages in terms of air flow.
• the spinning chamber essentially consists of a tube which is closed at its periphery and which is designed as a sieve tube only in a specific area, specifically from 150 to 350 mm, in particular from 200 to 300 mm, from the spinneret pack.
• the perforated area can be provided with any openings for the gas passage.
• the air permeability of the sieve tube should be 20 to 40%, ie the perforated surface should have openings of 20 to 40%.
• a filament produced with the device according to the invention has an uneven titer of ⁇ 0.60% Uster.
• Fig. 1 shows a scheraatic spinning device with the spinning chamber according to the invention
• a spinning block is denoted by 1.
• a spinneret pack 2 is provided in a slightly reset manner.
• Spinneret pack 2 has a gas-permeable ring designated as sieve tube 4.
• the lower part of the spinning chamber 3 is formed into a funnel 6 and is dimensioned such that the filaments 5 emerging from the spinneret pack 2 cannot touch the wall of the spinning chamber 3.
• a thread suction nozzle is connected gas-tight to the apex of the funnel 6 and is provided in the convergence point of the filament bundle.
• a melt-spinnable granulate is melted in the spinning block 1 in a known manner and is tensioned into filaments 5 by the spinneret pack 2.
• the suction of the Eadenabsaugdüse 7 ent there is an oppression in the spinning chamber 3.
• room air flows through the sieve tube 4 of the spinning chamber 3 and cools the filaments 5, which are drawn off at high speed by means of the spool 10.
• the filaments 5 Before the filaments 5 are wound onto the bobbin 10, they pass through the thread oiler 8 and the swirling nozzle 9.
• a polyester granulate with an intrinsic viscosity (IV) of 0.62 dl / g is melted at 298 ° C in spin block 1, spun into 24 filaments with a total density of 50 dtex at a take-off speed of 5500 m / min.
• the spinning chamber was 460 mm long and perforated between 150 and 250 mm below the nozzle plate with a permeability of 38%.
• the thread suction nozzle 7 was subjected to an air pressure of 1 bar and indicated an air consumption of 5.6 Nm 3 / h. After leaving the thread suction nozzle 7, the thread was provided with a spin finish and swirled in a known manner.
• the table shows that a filament thread produced with the device according to the invention has a significant improvement in yarn cleanliness and an increase in strength.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Textile Engineering (AREA)
• Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

Family

ID=4249607

Family Applications (1)

Country Status (5)

Cited By (2)

Families Citing this family (1)

Citations (3)

Family Cites Families (2)

• 1989
  • 1989-08-14 BR BR898907063A patent/BR8907063A/pt unknown
  • 1989-08-14 EP EP89908959A patent/EP0396646B2/de not_active Expired - Lifetime
  • 1989-08-14 DE DE89908959T patent/DE58906504D1/de not_active Expired - Fee Related
  • 1989-08-14 JP JP50844489A patent/JPH03500908A/ja active Pending
  • 1989-08-14 WO PCT/CH1989/000147 patent/WO1990002222A1/de active IP Right Grant
• 1996
  • 1996-04-01 JP JP1996002396U patent/JP2535880Y2/ja not_active Expired - Lifetime

Patent Citations (3)

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