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
  • D01D5/088—Cooling filaments, threads or the like, leaving the spinnerettes
• • D—TEXTILES; PAPER
  • D02—YARNS; MECHANICAL FINISHING OF YARNS OR ROPES; WARPING OR BEAMING
  • D02J—FINISHING OR DRESSING OF FILAMENTS, YARNS, THREADS, CORDS, ROPES OR THE LIKE
  • D02J13/00—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass
  • D02J13/001—Heating or cooling the yarn, thread, cord, rope, or the like, not specific to any one of the processes provided for in this subclass in a tube or vessel

Definitions

• the invention relates to a device for melt spinning and cooling a filament bundle according to the preamble of claim 1, as well as an executable by means of such a device method according to the preamble of claim 9.
• a plurality of fine filamentary filaments are extruded through nozzle bores of a spinneret.
• the spinneret is fed a molten polymer under high pressure.
• the plurality of strand-like filaments are combined in their entirety or in bundles.
• Prior to combining the filaments are cooled by a cooling air flow, so that the molten state of the filaments after exiting the nozzle bore into a solidified state.
• the uniformity of the cooling of all filaments is of great importance.
• filaments in the form of a filament bundle are guided inside the air candle in addition to the filaments which run outside an air candle in the form of a filament curtain.
• Both the inner circumference and the outer circumference of this air candle communicate with the filaments in relation to their cooling.
• the inner circumference of this air candle is formed as at least partially air-permeable jacket. Parts of the air cleaner are thus inter alia a perforated outer and a perforated inner cylinder.
• This hollow cylindrical air candle requires a special Anornung the nozzle holes in the spinneret device.
• the spinnerette device consists of one or more melt distributors and one or several spinnerets. No nozzle bores are present in an annular region of the spinnerette device which adjoins the air candle. Furthermore, both within and outside of this annular region each have a nozzle bore zone in which a plurality of nozzle bores are arranged. In contrast to conventional spinneret devices, which have nozzle bores only outside of an air filter, it is possible by means of the arrangement of the nozzle bores proposed here to place significantly more bores in the same space, always being able to achieve sufficient cooling on the condition.
• the air candle has at least one connection, through which the cooling air is discharged to the air candle to, or out of the air candle out.
• a separating cylinder is arranged in the interior of the air candle. This creates an outer channel adjacent to the outer cylinder and an inner channel adjacent to the inner cylinder. This separation makes the uniform cooling Development of the filament curtain and filament bundles easier because the cooling air of the filament curtain s and the filament bundle in the air candle do not mix. This separation within the air candle makes it possible to influence the flow separately in the outer channel and in the inner channel.
• at least one air connection is assigned to each channel. Thus, a different flow state can be set in each channel.
• this setting of different flow states is implemented by appropriate flow-influencing means.
• the inner channel and the outer channel is assigned to each one, possibly adjustable throttle.
• a single air connection for the air candle would suffice, but nevertheless different states can prevail or be set in the outer and inner channels.
• These throttles may further fulfill a function of the flow rectification.
• the uniform cooling manifests itself, for example, in a staple fiber process in that all the staple fibers produced are in the desired tolerance ranges with regard to their properties.
• Fig. 1 shows schematically a cross-sectional view of a first embodiment of the device according to the invention
• Fig. 2 shows schematically a sectional view of the first embodiment of the device according to the invention along the line A-A
• FIG. 3 shows a schematic cross-sectional view of a second embodiment of the device according to the invention
• Fig. 4 shows schematically a sectional view of the second embodiment of the device according to the invention along the line A-A
• Fig. 5 shows schematically a cross-sectional view of a third embodiment of the device according to the invention
• FIG. 1 shows a cross-sectional view of a first exemplary embodiment of the device according to the invention for carrying out the method according to the invention.
• the device consists of a spinning device 1 and a cooling device 11 arranged below the spinning device 1.
• the spinning device 1 has on a lower side a spinneret device which consists of a melt distributor 4 and a spinneret 5.
• This spinneret 5 is disposed on the underside of the spinneret assembly and has a plurality of nozzle bores 6.
• These nozzle bores 6 are arranged in two nozzle bore zones, with a first zone being formed by an outer ring of nozzle bores 6 and a second zone within the first zone is formed by a circular arrangement of nozzle bores 6.
• the spinneret 5 is connected via the melt distributor 4 with a spinning pump 2.
• the spinning pump 2 is connected via a melt feed 3 with a melt generator (not shown here), preferably connected to an extruder or a polycondensation.
• the spinning pump 2, the melt distributor 4 and the spinneret 5 are heated.
• so-called spin bars are generally used in which a plurality of spinnerets, for example, are held next to one another in a row.
• the cooling device 11 below the spinning device 1 has an air candle 12 and the associated air channel 20.
• the air candle 12 has a porous outer cylinder 13 and a porous inner Zy cylinder 14, which may be made for example of a non-woven, foam, mesh or a sintered material.
• the air candle 12 adjoins the spinneret 5.
• the air candle 12 is held concentrically with the spinneret 5, so that the air candle 12 is enveloped by a filament curtain 9, and so that the air candle 12 encloses a filament bundle 10.
• Filamentschar 7 consists of just this filament curtain 9 and this filament bundle 10, wherein in each case a nozzle bore zone for the extrusion of filament curtain 9 and filament bundle 10 in the spinneret 5 is present.
• an air channel 20 is connected to the air candle 12.
• This air duct 20 communicates with a fan 21.1 in connection, through which the air filter 12 either supplied cooling air, or through which cooling air is discharged from the air candle 12.
• a molten polymer is supplied via the spinning pump 2 under high pressure via the melt distributor 4 of the spinneret 5.
• the polymer melt is forced through the formed on the bottom of a plurality of nozzle bores 6, so that a plurality of strand-like filaments 8 is formed.
• the extruded filament bundle 7 forms an annular filament curtain 9 and a circular filament bundle 10, which are drawn off uniformly from the spinneret 5 by a withdrawal mechanism, not shown here.
• a cooling medium is preferably supplied to a cooling air via the air passage 20 of the air candle 12 and in the space inside the air candle 12, which is located between the outer cylinder 13 and the inner cylinder 14 passes.
• the cooling medium occurs evenly over the outer cylinder 13 of the air candle 12 to the outside and evenly over the inner cylinder 14 to the inside.
• At the inner and outer circumference of the air candle 12 creates a radial outlet flow, which leads a cooling air flow in the direction of the filament bundle 7.
• the cooling air flow penetrates into the filament bundle 7 and absorbs heat from filaments 8 of the filament bundle 7, so that the still liquid filaments 8 solidify gradually.
• the cooling medium could also be removed from the air candle 12 by means of the blower 21.1.
• ambient air is drawn in from the environment. This ambient air serves as cooling air by first penetrating the filament bundle 7, wherein the filaments 8 deliver their heat to the cooling air.
• the cooling air flows via the outer cylinder 13 and the inner cylinder 14 into the air candle 12. About the air passage 20, the cooling air leaves the air candle 12 again.
• the materials of the outer cylinder 13 and the inner cylinder 14 are coordinated so that optimum and preferably uniform cooling conditions for the filament curtain 9 and the filament bundle 10 arise.
• two different nonwovens with different air resistances could be used for this purpose.
• the two nozzle bore zones could also be formed by two different spinnerets 5. Even a single nozzle bore zone may consist of several spinnerets.
• a plurality of circular spinnerets could be arranged to form a ring.
• the nozzle bores 6, from which the filament bundle 10 is extruded, could also be distributed over several spinnerets.
• one or more melt distributors 4 and one or more spinning pumps 2 could be used.
• FIG. 2 schematically shows a sectional view of the first exemplary embodiment from FIG. 1 along the line AA.
• the concentric arrangement of the regions of the filament bundle 7 and the air candle 12 can be seen particularly well.
• the inner cylinder 14 of the air candle 12 is arranged.
• the cooling air is supplied or removed.
• the filaments 8 of the filament curtain 9 are arranged in a ring shape.
• the cooling air flows, as indicated by the arrows, mainly radially through the filament bundle 7. If an overpressure prevails in the air filter 12, the cooling air flows radially outwards through the filament curtain 9 and radially inwardly through the filament bundle 10, in the direction of FIG filled arrowheads. If a negative pressure is applied to the air candle 12, the cooling air flows radially inward through the filament curtain 9 and radially outward through the filament bundle 10, in the direction of the dashed arrowheads.
• FIG. 3 shows a cross-sectional view of a second exemplary embodiment of the device according to the invention for carrying out the method according to the invention. Many elements are the same as the first Embodiment of Fig. 1, which is why only addresses the changes.
• a separating cylinder 15 is arranged here, so that an outer channel 16 assigned to the outer cylinder 13 and an inner channel 17 assigned to the inner cylinder 14 are formed.
• an inner throttle 19 is arranged at the transition between air duct 20 and inner channel 17.
• an outer throttle 18 is arranged at the transition between air duct 20 and outer duct 16.
• the inner throttle 19 and the outer throttle 18 may be optionally adjustable with respect to their flow resistance. These two throttles can furthermore be designed such that they serve for the flow rectification.
• the blower 21.1 either serve to supply cooling air to the air candle 12 or remove cooling air from the air candle 12.
• Fig. 4 is a sectional view of the second embodiment of Fig. 3 is shown schematically along the line AA.
• the two embodiments differ only by the separating cylinder 15, which divides the space between the outer cylinder 13 and inner cylinder 14 in the outer channel 16 and the inner channel 17.
• Fig. 5 shows a third embodiment of the device according to the invention. Apart from the differences described below, this is constructed identically to the second exemplary embodiment from FIG. 3. The outer throttle 18 and the inner throttle 19 are missing in this exemplary embodiment. For the outer channel 16 and the inner channel 17 each receive a separate Heilzu- or air discharge.
• the air duct 20 is divided by appropriate separating means.
• the outer channel 16 is associated with a fan 21.1, the inner channel 17 another fan 21.2. Also in this way, the cooling air flows for the filament bundle 10 and the filament curtain 9 can be set separately from each other.
• This version with two blowers offers many possibilities for cooling air flow.
• both the inner channel 17 as well as the outer channel 16 are both subjected to pressure or both with negative pressure. Furthermore, a mutual control is possible.
• the outer channel 16 is evacuated and the inner channel 17 are pressurized or vice versa.

Landscapes

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

Priority Applications (4)

Applications Claiming Priority (2)

Publications (1)

Family

ID=54347499

Family Applications (1)

Country Status (6)

Families Citing this family (2)

Citations (4)

Family Cites Families (4)

• 2014
  • 2014-10-23 DE DE102014015729.6A patent/DE102014015729A1/de not_active Withdrawn
• 2015
  • 2015-10-16 KR KR1020177013603A patent/KR20170072927A/ko unknown
  • 2015-10-16 CN CN201580057281.7A patent/CN107075735B/zh active Active
  • 2015-10-16 WO PCT/EP2015/073984 patent/WO2016062626A1/de active Application Filing
  • 2015-10-16 JP JP2017522016A patent/JP2017531746A/ja active Pending
  • 2015-10-16 EP EP15784608.0A patent/EP3209820B1/de not_active Not-in-force

Patent Citations (4)

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