CN117468102A - Coupling type anti-doubling spandex spinning channel and method - Google Patents
Coupling type anti-doubling spandex spinning channel and method Download PDFInfo
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- CN117468102A CN117468102A CN202311826174.9A CN202311826174A CN117468102A CN 117468102 A CN117468102 A CN 117468102A CN 202311826174 A CN202311826174 A CN 202311826174A CN 117468102 A CN117468102 A CN 117468102A
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- 229920002334 Spandex Polymers 0.000 title claims abstract description 105
- 239000004759 spandex Substances 0.000 title claims abstract description 105
- 238000009987 spinning Methods 0.000 title claims abstract description 73
- 230000008878 coupling Effects 0.000 title claims abstract description 55
- 238000010168 coupling process Methods 0.000 title claims abstract description 55
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 55
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000000835 fiber Substances 0.000 claims abstract description 83
- 230000000712 assembly Effects 0.000 claims abstract description 15
- 238000000429 assembly Methods 0.000 claims abstract description 15
- 239000011550 stock solution Substances 0.000 claims abstract description 12
- 229920000642 polymer Polymers 0.000 claims abstract description 10
- 239000002904 solvent Substances 0.000 claims description 23
- 230000009471 action Effects 0.000 claims description 15
- 238000001514 detection method Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000007769 metal material Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000005507 spraying Methods 0.000 abstract 1
- 230000002265 prevention Effects 0.000 description 9
- 230000006872 improvement Effects 0.000 description 8
- 238000009826 distribution Methods 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000012535 impurity Substances 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000000087 stabilizing effect Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000000578 dry spinning Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
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- 238000006116 polymerization reaction Methods 0.000 description 1
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- 229910001220 stainless steel Inorganic materials 0.000 description 1
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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
- D01D5/04—Dry spinning methods
Abstract
The invention provides a coupling type anti-doubling spandex spinning channel and a method, which belong to the technical field of spandex spinning production, wherein a spinneret plate is arranged at the top of the channel, a spinning component for extruding polymer stock solution to form spandex fibers is arranged on the spinneret plate, air inlet chambers and upper air return chambers opposite to the air inlet chambers are arranged at two sides of the upper part of the channel, and the coupling type anti-doubling component which extends along the length direction of the channel is fixed in the channel; the coupling type yarn-doubling preventing assembly comprises first slow-flow plates which separate adjacent spandex fibers along the transverse airflow direction, and the number of the first slow-flow plates is smaller than that of the yarn-spraying assemblies; a plurality of rectifying holes are formed in the first slow flow plate, and the rectifying holes on the adjacent first slow flow plate are arranged in a staggered mode. The invention improves the gas flow field in the channel by carrying out flow equalization and steady flow on the transverse air flow in the channel, reduces the disturbance effect of the transverse air flow on the spandex fiber, and reduces the doubling and breaking phenomena of the spandex fiber, thereby improving the production quality of the spandex fiber.
Description
Technical Field
The invention relates to the technical field of spandex spinning production, in particular to a coupling type anti-doubling spandex spinning channel and a coupling type anti-doubling spandex spinning method.
Background
The dry process for producing spandex fiber generally comprises two steps of polymerization and spinning, wherein spinning is an important stage of spandex fiber forming and is mainly carried out through a spinning channel. The polymer spinning dope is fed into a spinneret plate through a spinning metering pump, extruded into dope trickles under the action of pressure, extruded from the spinneret plate and fed into a spinning channel. In the spinning channel, under the action of hot air, the fiber undergoes three processes of solvent flash evaporation, solvent diffusion from the inside of the stock solution trickle outwards, and the solvent performs convection mass transfer from the trickle surface to surrounding gas medium, so that the volatilization and recovery processes of the solvent are completed, and finally the finished fiber is obtained.
In actual production, under the action of air inlet and return air, due to the movement of hot air, gas vortex is generated in the channel cavity, and the uncontrollable phenomenon can cause uneven wind speed, disturb the normal movement of fibers, cause the phenomena of yarn doubling and yarn breakage of the fibers, influence the production stability of spandex fibers and finally influence the quality of finished yarn.
CN219157052U discloses an improved upper blowing spandex dry spinning channel for avoiding doubling problem, an upper air inlet static pressure chamber and an upper air return static pressure chamber are respectively arranged at the left and right sides of the upper part of the channel, and the main improvement is that an upper second air inlet system is arranged at the top of the channel near the upper air inlet rectifier side, and the upper second air inlet system blows air to the inner oblique side of the channel, so that the air of the lower channel moves downwards along the side wall of the air inlet side. However, the scheme increases the upper second air inlet system to blow air to the inner inclined side of the channel, so that the speed of the transverse air flow at the upper part of the channel is improved, the swaying of the spandex fiber can be increased to a certain extent, the transverse stress of the spandex fiber can be increased, and the defects in yarn doubling and yarn breakage prevention are overcome.
Disclosure of Invention
Aiming at the problems, the invention provides a coupling type anti-doubling spandex spinning channel and a method for reducing the doubling and breakage phenomena of spandex fibers when spandex fibers are produced.
The invention provides a coupling type anti-doubling spandex spinning channel, wherein a spinneret plate is arranged at the top of the channel, a spinning component for extruding polymer stock solution to form spandex fibers is arranged on the spinneret plate, air inlet chambers and upper air return chambers opposite to the air inlet chambers are arranged on two sides of the upper part of the channel, and the coupling type anti-doubling component extending along the length direction of the channel is fixed in the channel; the coupling type anti-doubling assembly comprises first slow flow plates which separate adjacent spandex fibers along the transverse airflow direction, and the number of the first slow flow plates is smaller than that of the spinning assemblies; and a plurality of rectification holes allowing transverse airflow to pass through are formed in the first slow flow plate, and the rectification holes on the adjacent first slow flow plate are staggered.
As a further improvement of the invention, the coupling type anti-doubling assembly further comprises a second slow flow plate facing the air outlet side of the air inlet chamber and positioned between the first slow flow plate and the inner wall of the channel, a plurality of rectifying holes are formed in the second slow flow plate, and spandex fibers are positioned between the first slow flow plate and the second slow flow plate and are staggered in the rectifying holes of the first slow flow plate and the second slow flow plate.
As a further improvement of the invention, the coupling type anti-doubling assembly further comprises a third slow flow plate facing the air inlet side of the upper air return chamber and positioned between the first slow flow plate and the inner wall of the channel, a plurality of rectifying holes are formed in the third slow flow plate, and spandex fibers are positioned between the first slow flow plate and the third slow flow plate and are staggered in the rectifying holes of the first slow flow plate and the third slow flow plate.
As a further improvement of the invention, an air inlet net and a grille are arranged in the air inlet chamber, and/or an air net is arranged in the upper return air chamber.
As a further improvement of the invention, the channel also comprises a lower air return chamber and a secondary air return chamber which are fixed on the outer wall of the lower part, wherein the lower air return chamber and the secondary air return chamber are oppositely arranged, and the height of the secondary air return chamber is lower than that of the lower air return chamber.
As a further improvement of the invention, the shaft comprises an upper shaft, a middle shaft and a lower shaft along the spinning direction, the air inlet chamber and the upper return air chamber are positioned on the upper shaft, and the lower return air chamber and the secondary return air chamber are positioned on the middle shaft.
As a further improvement of the invention, the coupling type anti-doubling component is made of heat-conducting metal materials.
As a further development of the invention, a temperature detection device is arranged in the shaft and/or on the coupled anti-doubling component
In a second aspect, the present invention provides a coupled anti-doubling spandex spinning method, the method comprising:
s1, hot air is introduced into a channel from an air inlet chamber in advance and returned from an upper return air chamber, and the transverse hot air is subjected to flow equalization and steady flow through a coupling type doubling prevention assembly on a path from the air inlet chamber to the upper return air chamber;
s2, extruding polymer stock solution through a spinning component on a spinneret plate to form primary fibers, stretching the primary fibers downwards under the action of gravity and separating adjacent spandex fibers by a first slow flow plate, recovering volatile solvents after hot air passes through a rectifying hole on the first slow flow plate, finally leading out qualified fiber products through the lower part of a channel, and discharging hot air containing the volatile solvents through an upper return air chamber.
As a further improvement of the invention, the temperature of the hot air in the channel is maintained at 200-265 ℃.
The invention provides a coupling type anti-doubling spandex spinning channel and a method, which have at least the following beneficial effects: the coupling type yarn doubling prevention assembly is arranged in the channel, and the rectifying holes which are staggered along the transverse airflow direction are formed in the assembly, so that airflow can be effectively uniform and stabilized, the distribution of the airflow field in the channel is improved, vortex is reduced, the disturbance of the airflow to the spandex fiber is reduced on the basis of guaranteeing the solvent volatilization effect, the shaking of the spandex fiber in the channel is reduced, yarn doubling and yarn breakage are further reduced, the production stability of the spandex fiber is improved, and the quality of finished spandex fiber is improved; due to the effects of the coupling type doubling prevention assembly and the rectifying hole, the airflow is more uniform and stable, the solvent can be volatilized uniformly, the temperature of hot air in the channel is monitored by the temperature detection device, and the temperature of the hot air can be adjusted according to the monitoring result, so that the effective volatilization of the solvent is ensured.
Drawings
Fig. 1 is a front view of a coupled anti-doubling spandex spinning shaft in accordance with an embodiment of the invention.
Fig. 2 is an isometric view of a coupled anti-doubling spandex spinning shaft in accordance with an embodiment of the invention.
FIG. 3 is a schematic view of a portion of the working state of a coupling type anti-doubling spandex spinning shaft according to an embodiment of the invention.
Fig. 4 is a graph of the local gas flow field distribution of the uncoupled anti-doubling spandex spinning shaft.
Fig. 5 is a graph of the local gas flow field profile of a coupled anti-doubling spandex spinning shaft in accordance with an embodiment of the invention.
Reference numerals illustrate: 1. a channel; 2. the upper channel; 3. a middle channel; 4. a lower channel; 5. a spinneret plate; 6. a spinning assembly; 7. spandex fiber; 8. a coupling type doubling preventing assembly; 81. a first slow flow plate; 82. a second slow flow plate; 83. a third slow flow plate; 9. a rectifying hole; 10. an air inlet chamber; 11. an air inlet; 12. a wind net; 13. a grille; 14. an upper return air chamber; 15. an upper return air inlet; 16. a lower return air chamber; 17. a lower return air inlet; 18. a secondary air return chamber; 19. and a secondary air return port.
Detailed Description
The following detailed description of the invention is provided in connection with the examples and figures 1-5 to enable those skilled in the art to more fully understand the objects, features and effects of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. To the extent that the definitions of terms in this specification are inconsistent with the meaning commonly understood by those skilled in the art to which this invention pertains, the definitions set forth in this specification control.
The invention provides the coupling type anti-doubling spandex spinning channel and the method, which correspondingly improve the spandex spinning technology, and reduce the phenomena of doubling and yarn breakage in the spandex spinning process by adjusting the airflow in the spinning channel, thereby improving the molding quality of spandex fibers.
Example 1
As a specific embodiment of the present invention, this embodiment provides a coupled anti-doubling spandex spinning shaft, referring to fig. 1 and 2, the shaft 1 includes an upper shaft 2, a middle shaft 3, and a lower shaft 4, and the upper shaft 2, the middle shaft 3, and the lower shaft 4 are sequentially arranged from top to bottom according to the spinning direction. In this embodiment, the transverse dashed lines shown in fig. 1 are the dividing lines of the upper shaft 2, the middle shaft 3 and the lower shaft 4.
A spinneret plate 5 is installed at the top of the upper shaft 2, and preferably, the spinneret plate 5 is installed at the middle position of the top of the upper shaft 2. The spinneret 5 is provided with a plurality of spinneret assemblies 6 at intervals for extruding polymer stock solution, wherein the spinneret assemblies 6 are composed of at least one spinneret, and the spinneret assemblies 6 are arranged in rows. Specifically, the number of spin packs 6 is configured according to the number of spinning heads required. The middle part of the channel 1 is fixedly provided with a coupling type doubling preventing component 8, and the coupling type doubling preventing component 8 is connected and coupled with the channel 1 to form an integral structure. The spandex fiber 7 formed by the polymer stock solution extruded by the spinning component 6 is stretched to the bottom of the lower channel 4 through the coupling type doubling preventing component 8; the number of spandex fibers 7 is equal to the number of spinnerets of the spin pack 6. Preferably, the coupling type anti-doubling assembly 8 extends from the top of the upper shaft 2 to the bottom of the lower shaft 4, i.e. the length of the coupling type anti-doubling assembly 8 is equal to the length of the shaft 1. The top of the coupling type doubling preventing assembly 8 is connected with the spinneret plate 5, and the bottom of the coupling type doubling preventing assembly is connected with the lower channel 4. In this embodiment, the length direction of the shaft 1 is referred to as the spin direction.
Preferably, the coupling type yarn preventing assembly 8 is connected with the spinneret plate 5 and the lower channel 4 through bolts or welding, so that the coupling type yarn preventing assembly 8 and the channel 1 are coupled.
The coupling type anti-doubling assembly 8 comprises at least one first slow flow plate 81, and a plurality of first slow flow plates 81 are arranged in an array mode. The first slow flow plate 81 is fixed in the channel 1 and is perpendicular to the transverse wind direction of the inlet air. The first slow flow plate 81 separates the adjacent spandex fibers 7 in the direction of the lateral wind direction. The number of the first slow flow plates 81 of the coupling type anti-doubling assembly 8 is smaller than the number of the spinning assemblies 6, and preferably, when the number of the spinning assemblies 6 is m, the number n of the first slow flow plates 81 is m-1. Specifically, when the number of the spinning assemblies 6 is 2, the number of the first slow flow plates 81 is 1, and when the number of the spinning assemblies 6 is 4, the number of the first slow flow plates 81 is 3 and arranged at intervals. Through above-mentioned scheme, all be provided with first slow flow board 81 between two spinneret assemblies 6, first slow flow board 81 separates two adjacent rows of spinnerets. In the process of forming the spandex fibers 7, the adjacent spandex fibers 7 are separated by the first slow-flow plate 81, so that each row of spandex fibers 7 are formed in a relatively independent space, the mutual influence is avoided, and the phenomenon of doubling can not occur.
Preferably, the spinning assemblies 6 are equidistantly arranged, and when the number of the spinning assemblies 6 is 2 and the number of the first slow flow plates 81 is 1, the first slow flow plates 81 are positioned at the middle positions of the adjacent spandex fibers 7, so that the distances between the first slow flow plates 81 and the adjacent spandex fibers 7 are respectively equal; when the number of the spinning assemblies 6 is greater than 2, the spandex fibers 7 in the middle are positioned in the middle of the adjacent first slow-flow plates 81, so that the distances between the adjacent spandex fibers 7 and the first slow-flow plates 81 in the middle are equal. The arrangement can leave enough space for slight shaking of the spandex fiber 7, and the phenomenon that the spandex fiber 7 breaks due to collision of the spandex fiber 7 and the first slow-flow plate 81 is avoided.
Preferably, the shaft 1 is rectangular. The length of the first slow flow plate 81 is equal to the distance between the opposite inner walls of the channel 1 in the length direction, namely, the first slow flow plate 81 is respectively contacted with the top of the upper channel 2 and the bottom of the lower channel 4; the width of the first slow flow plate 81 is equal to the distance between the opposite inner walls of the shaft 1 in the width direction, so that the first slow flow plate 81 partitions the interior of the shaft 1 into a plurality of independent spaces along the lateral air flow direction. In this embodiment, the first flow-retarding plate 81 is a perforated plate and is provided with a plurality of rectifying holes 9, and the air flow in the shaft 1 can only move between the spaces separated by the first flow-retarding plate 81 through the rectifying holes 9. By arranging the first slow flow plate 81 with the rectifying holes 9, the transverse airflow is relieved, the transverse acting force on the spandex fiber 7 is reduced, the shaking degree of the spandex fiber 7 in the channel 1 is reduced, and the yarn breakage phenomenon is avoided. The rectifying hole 9 can play a role in homogenizing air flow and stabilizing air flow, and reduces vortex in the channel 1, so that the solvent can be volatilized more uniformly.
Preferably, referring to fig. 2 and 3, the rectification holes 9 on two adjacent first slow-flow plates 81 are staggered, so that the flow speed of the air flow in the transverse direction is further reduced, the transverse acting force of the air flow is reduced, the influence of the transverse air flow on the spandex fibers 7 is reduced, and the adjacent spandex fibers 7 are effectively prevented from shaking under the action of hot air and the phenomenon of doubling occurs. The airflow can flow in the transverse direction due to the existence of the rectifying holes 9, thereby facilitating the volatilization of the solvent.
Specifically, as shown in fig. 3, the air flow includes a vertical air flow parallel to the first flow delaying plate 81 and a lateral air flow perpendicular to the first flow delaying plate 81. Because the rectification holes 9 on the adjacent first slow flow plates 81 are arranged in a staggered manner, the transverse air flow passing through the rectification holes 9 of the first slow flow plates 81 on the left side cannot directly pass through the rectification holes 9 of the adjacent first slow flow plates 81 on the right side, but is blown onto the plate body of the first slow flow plates 81 on the right side, so that the effects of air flow speed reduction and air flow redistribution are achieved.
The shape of the rectifying hole 9 is preferably circular, and the rectifying hole 9 is arranged into a circular shape, so that the processing is convenient, and the aperture ratio is high. In other embodiments, the rectifying aperture 9 may be elliptical, square, polygonal in shape.
Preferably, the rectification holes 9 on the first slow flow plate 81 are uniform in specification and uniform in pitch, so that the rectification holes 9 are uniformly arranged on the first slow flow plate 81.
Referring to fig. 1 and 2, an air inlet chamber 10 and an upper air return chamber 14 which are respectively communicated with the upper channel 2 are distributed on the outer wall of the upper channel 2 in the direction vertical to the first slow flow plate 81, and the air inlet chamber 10 and the upper air return chamber 14 are oppositely arranged. The lower part of the air inlet chamber 10 is connected with an air inlet 11, and the lower part of the upper air return chamber 14 is connected with an upper air return opening 15.
During spinning operation, hot air firstly enters the air inlet chamber 10 through the air inlet 11 and then enters the upper channel 2, and the hot air is recovered from the upper air return chamber 14 through the upper air return opening 15 by carrying volatile solvent after passing through the coupling type doubling preventing assembly 8.
Preferably, the air inlet chamber 10 and the upper air return chamber 14 are both in a cube shape, and the air outlet of the air inlet chamber 10 and the air inlet of the upper air return chamber 14 are horizontally arranged oppositely and have the same height.
An air inlet net 12 which is vertical and parallel to the air outlet of the air inlet chamber 10 is arranged in the air inlet chamber 10, a grid 13 is arranged between the air net 12 and the air outlet of the air inlet chamber 10, and the grid 13 is parallel to the air net 12. The hot air entering the air inlet chamber 10 passes through the air inlet net 12 and the grille 13 in sequence and then is conveyed into the upper channel 2. The air net 12 and the grille 13 further play roles in homogenizing air flow and stabilizing air flow, so that the effect of distributing the wind field is achieved, and the air flow entering the channel 1 from the air inlet 11 of the air inlet chamber 10 is more uniform and stable. The air net 12 and the grille 13 can filter the entering hot air to a certain extent to remove impurities in the hot air flow.
The upper return air chamber 14 is internally provided with a vertical air net 12 parallel to the air inlet of the upper return air chamber 14, so as to play a role in dispersing air flow and filtering impurities to a certain extent.
A lower air return chamber 16 communicated with the middle channel 3 is fixedly arranged on the outer wall of the lower part of the middle channel 3, and the bottom of the lower air return chamber 16 is connected with a lower air return opening 17. Preferably, the lower return air chamber 16 is located on one side of the upper return air chamber 14.
Further, a secondary air return chamber 18 communicated with the middle channel 3 is fixedly arranged on the outer wall of the lower part of the middle channel 3, and the bottom of the secondary air return chamber 18 is connected with a secondary air return opening 19. Preferably, the secondary return air chamber 18 is located at one side of the air intake chamber 10, and the secondary return air chamber 18 has a lower height than the lower return air chamber 16.
Preferably, the top level of the secondary return air compartment 18 is lower than the bottom level of the lower return air compartment 16.
The residual hot air along the spinning range direction is recovered through the lower return air chamber 16 and then is recovered through the secondary return air chamber 18, and the lower return air chamber 16 and the secondary return air chamber 18 are distributed on two sides of the channel 1, so that the hot air can be effectively recovered, and the recovery rate of the solvent is improved.
In other embodiments, the secondary air return chamber 18 may be fixedly disposed on the outer wall of the lower shaft 4.
Further, the coupled anti-doubling assembly 8 further comprises a second flow-slowing plate 82 facing the air outlet side of the air inlet chamber 10 and located between the first flow-slowing plate 81 and the inner wall of the channel 1, and the second flow-slowing plate 82 is parallel to the first flow-slowing plate 81. The second slow flow plate 82 is a perforated plate and is provided with rectifying holes 9, and the rectifying holes 9 on the second slow flow plate 82 are staggered with the rectifying holes 9 on the first slow flow plate 81 to protect the spandex fibers 7 closest to the air outlet side of the air inlet chamber 10. In the foregoing solution, the first slow flow plate 81 is used to separate the spandex fibers 7 extruded by the adjacent spinneret assemblies 6, but the spandex fibers 7 closest to the air outlet side of the air inlet chamber 10 lack of transition with the air outlet of the air inlet chamber 10, so that the applied force of the lateral air flow is large, which easily results in the occurrence of larger shaking of the outermost spandex fibers 7 close to the air outlet side of the air inlet chamber 10, and the yarn breakage phenomenon occurs. Therefore, through setting up the second slow flow board 82 of seting up the rectifying hole 9 between first slow flow board 81 and the inner wall of corridor 1, reduce the lateral effort of air current, stabilize the air current, alleviate the rocking of the spandex fibre 7 that is close to the air inlet end in the outermost side, avoid spandex fibre 7 to appear the broken silk phenomenon, guarantee the shaping quality of outside spandex fibre 7. Preferably, the second slow flow plate 82 is equidistant from the closest first slow flow plate 81 and the spandex fibers 7 located therebetween.
Further, the coupled anti-doubling assembly 8 further comprises a third flow-slowing plate 83 facing the air inlet side of the upper return chamber 14 and located between the first flow-slowing plate 81 and the inner wall of the shaft 1. The third slow flow plate 83 is parallel to the first slow flow plate 81. The third slow flow plate 83 is a perforated plate and is provided with rectifying holes 9, and the rectifying holes 9 on the third slow flow plate 83 and the rectifying holes 9 on the first slow flow plate 81 are arranged in a staggered mode to protect the spandex fibers 7 closest to the air inlet side of the upper return air chamber 14, reduce the transverse wind speed around the spandex fibers 7, stabilize the air flow and reduce the occurrence of yarn breakage. Because the recovery of the solvent is mainly completed by the upper return air chamber 14, the third slow flow plate 83 can effectively avoid larger shaking of the spandex fiber 7 under the action of return air.
Preferably, the second and third slow-flow plates 82, 83 have the same specifications as the first slow-flow plate 81. The rectifying hole 9 on the first slow flow plate 81 is a first rectifying hole, the rectifying hole 9 on the second slow flow plate 82 is a second rectifying hole, and the rectifying hole 9 on the third slow flow plate 83 is a third rectifying hole.
Further, a temperature detection device, such as a high temperature sensor, is arranged in the shaft 1 and/or on the coupling type anti-doubling component 8, and is used for detecting the temperature of hot air in the shaft 1, so that the temperature of the hot air in the shaft 1 can be conveniently adjusted, the temperature of the hot air in the shaft 1 can be maintained at 200-265 ℃, and the uniform and efficient volatilization of the solution can be ensured. Preferably, a plurality of temperature detecting devices may be provided along the length direction of the shaft 1.
In an embodiment, the coupling type anti-doubling component 8 is made of heat conducting metal materials, such as copper, aluminum and stainless steel, a temperature detection device is arranged on the coupling type anti-doubling component 8 to monitor the temperature of hot air in the channel 1, and the temperature in the channel 1 can be adjusted by heating the coupling type anti-doubling component 8 to maintain the temperature of hot air in the channel 1 at 200-265 ℃.
Further, the first, second and third slow flow plates 81, 82 and 83 are made of heat conductive metal, and the temperature detecting device may be mounted on the first, second and/or third slow flow plates 81, 82 and 83.
The heating of the coupling type anti-doubling component 8 can adopt a heating mode in the prior art, and the invention is not repeated.
In another embodiment, the adjustment of the temperature of the hot air in the shaft 1 is achieved by varying the temperature of the incoming air. When the temperature detection device detects that the temperature of hot air in the channel 1 is lower than 200 ℃, the air inlet temperature is increased, so that the temperature of the hot air in the channel 1 is increased to be higher than 200 ℃ and maintained at 200-265 ℃; when the temperature detection device detects that the temperature of hot air in the channel 1 is higher than 265 ℃, the air inlet temperature is reduced, so that the temperature of the hot air in the channel 1 is reduced to below 265 ℃ and maintained at 200-265 ℃.
In other embodiments, both the heating of the coupled anti-doubling assembly 8 and the varying inlet air temperature may be used in combination.
When spinning operation is carried out in the channel 1, polymer stock solution is extruded by the spinning assembly 6 under the action of pressure to obtain primary fibers, the primary fibers flow downwards under the action of gravity, and simultaneously, the primary fibers sequentially pass through the upper channel 2, the middle channel 3 and the lower channel 4 along with volatilization of solvent, and gradually elongate and thin into spandex fibers 7. The solvent volatilizes mainly through the action of hot air, the hot air enters the air inlet chamber 10 through the air inlet 11, and the air flow distribution and the filtering of partial impurities are realized under the action of the air net 12 and the grid 13.
Under the action of the upper air return chamber 14, the hot air flow moves from left to right in the channel 1, sequentially passes through the second slow flow plate 82, the at least one first slow flow plate 81 and the third slow flow plate 83 of the coupling type doubling prevention assembly 8, is further uniformly distributed under the action of the rectifying holes 9, reduces the shaking of the spandex fiber 7, improves the doubling and yarn breakage problems, simultaneously enables a large amount of solvent in the spandex stock solution to volatilize rapidly, and most of the volatilized solvent is recovered through the upper air return chamber 14 and is led out through the upper air return opening 15.
The spandex fiber 7 continues to move downwards, a small amount of hot air containing solvent is recovered by the lower return air chamber 16 and the secondary return air chamber 18 and is led out by the lower return air opening 17 and the secondary return air opening 19 respectively, the solvent is further volatilized, the final fiber is shaped, and a qualified fiber product is led out from the lower part of the channel 1.
The invention simulates the gas flow field of the spandex spinning shaft without the coupling type anti-doubling component 8 and the gas flow field of the spandex spinning shaft with the coupling type anti-doubling component 8, and obtains the gas flow field distribution diagrams shown in fig. 4 and 5, wherein fig. 4 shows the gas flow field distribution diagram of the spandex spinning shaft without the coupling type anti-doubling component 8, which is close to the air inlet chamber 10, and fig. 5 shows the gas flow field distribution diagram of the spandex spinning shaft with the coupling type anti-doubling component 8, which is close to the air inlet chamber 10.
The spandex stock solution is gradually changed into spandex fiber from top to bottom, and under the action of the air inlet chamber 10, the upper air return chamber 14, the lower air return chamber 16 and the secondary air return chamber 18, air flows moving from left to right and from top to bottom exist.
As shown in fig. 4, in the spandex spinning shaft without the coupling type anti-doubling component 8, obvious vortex exists in the lower right shaft 1 of the air inlet chamber 10, and the position of a broken line frame in the figure is shown. In fig. 5, the vortex phenomenon at the same position is obviously improved, so that the shaking of the spandex fiber 7 in the channel is reduced, the phenomena of doubling and breakage of the fiber in the space of the channel 1 are avoided, and the quality of the finished product of the spandex fiber 7 can be effectively improved.
Example two
As a specific embodiment of the present invention, this embodiment provides a coupling type anti-doubling spandex spinning method, which uses the spandex spinning channel in the first embodiment to spin, including:
s1, hot air is introduced into a channel 1 from an air inlet chamber 10 in advance and is returned from an upper air return chamber 14, a lower air return chamber 16 and a secondary air return chamber 18, the transverse hot air passes through a coupling type yarn doubling prevention assembly 8 comprising a second slow flow plate 82, a first slow flow plate 81 and a third slow flow plate 83 on the path from the air inlet chamber 10 to the upper air return chamber 14, the flow is equalized and stabilized, and preferably, the temperature of the hot air after being introduced into the channel 1 is maintained at 200-265 ℃;
s2, extruding the polymer stock solution through a spinning assembly 6 on a spinneret plate 5 to form primary fibers, stretching the primary fibers downwards under the action of gravity, passing through a coupling type doubling prevention assembly 8, finally leading out qualified fiber products through the lower part of a channel 1, and discharging hot air containing volatile solvents through an upper return air chamber 14, a lower return air chamber 16 and a secondary return air chamber 18.
According to the coupling type yarn doubling prevention spandex spinning channel and the method, the coupling type yarn doubling prevention assembly 8 is arranged in the channel 1, so that the airflow field in the channel 1 is improved, yarn doubling phenomenon between adjacent spandex fibers 7 in the spinning process can be effectively prevented, the yield of the spandex fibers 7 is improved, the product quality is remarkably improved, the production efficiency is improved, and meanwhile, the yield of waste products is reduced, so that the cost saving effect is achieved.
The above description is only of the preferred embodiment of the present invention, and is not intended to limit the present invention in any other way, but is intended to cover any modifications or equivalent variations according to the technical spirit of the present invention, which fall within the scope of the present invention as defined by the appended claims.
Claims (10)
1. A spinneret plate (5) is arranged at the top of the channel (1), a spinning component (6) for extruding polymer stock solution to form spandex fibers (7) is arranged on the spinneret plate (5), air inlet chambers (10) and upper air return chambers (14) opposite to the air inlet chambers (10) are arranged on two sides of the upper part of the channel (1), and the coupling type anti-doubling component (8) extending along the length direction of the channel (1) is fixed in the channel (1); the coupling type anti-doubling assembly (8) comprises first slow flow plates (81) for separating the adjacent spandex fibers (7) along the transverse airflow direction, and the number of the first slow flow plates (81) is smaller than that of the spinning assemblies (6); the first slow flow plate (81) is provided with a plurality of rectification holes (9) allowing transverse air flow to pass through, and the rectification holes (9) on the adjacent first slow flow plate (81) are arranged in a staggered mode.
2. The coupled type anti-doubling spandex spinning shaft according to claim 1, wherein the coupled type anti-doubling assembly (8) further comprises a second slow flow plate (82) which faces the air outlet side of the air inlet chamber (10) and is positioned between the first slow flow plate (81) and the inner wall of the shaft (1), a plurality of rectifying holes (9) are formed in the second slow flow plate (82), spandex fibers (7) are positioned between the first slow flow plate (81) and the second slow flow plate (82) and the rectifying holes (9) of the first slow flow plate (81) and the second slow flow plate (82) are arranged in a staggered mode.
3. The coupled type anti-doubling spandex spinning shaft according to claim 1 or 2, wherein the coupled type anti-doubling assembly (8) further comprises a third slow flow plate (83) facing the air inlet side of the upper return air chamber (14) and located between the first slow flow plate (81) and the inner wall of the shaft (1), a plurality of rectifying holes (9) are formed in the third slow flow plate (83), spandex fibers (7) are located between the first slow flow plate (81) and the third slow flow plate (83) and the rectifying holes (9) of the first slow flow plate (81) and the third slow flow plate (83) are arranged in a staggered mode.
4. The coupled anti-doubling spandex spinning channel according to claim 1, wherein an air inlet net (12) and a grid (13) are arranged in the air inlet chamber (10), and/or an air net (12) is arranged in the upper air return chamber (14).
5. The coupled anti-doubling spandex spinning shaft according to claim 1, wherein the shaft (1) further comprises a lower return air chamber (16) and a secondary return air chamber (18) fixed on the outer wall of the lower part, the lower return air chamber (16) and the secondary return air chamber (18) are oppositely arranged, and the height of the secondary return air chamber (18) is lower than that of the lower return air chamber (16).
6. The coupled anti-doubling spandex spinning shaft according to claim 5, wherein the shaft (1) comprises an upper shaft (2), a middle shaft (3) and a lower shaft (4) along the spinning direction, the air inlet chamber (10) and the upper air return chamber (14) are positioned in the upper shaft (2), and the lower air return chamber (16) and the secondary air return chamber (18) are positioned in the middle shaft (3).
7. The coupled anti-doubling spandex spinning shaft according to claim 1, wherein the coupled anti-doubling assembly (8) is made of a heat-conducting metal material.
8. Coupling type anti-doubling spandex spinning shaft according to claim 1, characterized in that a temperature detection device is arranged inside the shaft (1) and/or on the coupling type anti-doubling assembly (8).
9. A coupled anti-doubling spandex spinning method, characterized in that the coupled anti-doubling spandex spinning channel as claimed in claims 1-8 is adopted for spinning, comprising:
s1, hot air is introduced into a channel (1) from an air inlet chamber (10) in advance and is returned from an upper return air chamber (14), and the transverse hot air is subjected to flow equalization and steady flow on a path from the air inlet chamber (10) to the upper return air chamber (14) through a coupling type anti-doubling assembly (8) comprising a first slow flow plate (81);
s2, extruding polymer stock solution through a spinning component (6) on a spinneret plate (5) to form primary fibers, stretching the primary fibers downwards under the action of gravity and separating adjacent spandex fibers (7) by a first slow flow plate (81), recovering volatile solvents after hot air passes through rectifying holes (9) on the first slow flow plate (81), finally leading out qualified fiber products through the lower part of a channel (1), and discharging hot air containing the volatile solvents through an upper return air chamber (14).
10. The coupling type anti-doubling spandex spinning method according to claim 9, wherein the temperature of hot air in the channel (1) is maintained at 200-265 ℃.
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| CN214244698U (en) * | 2020-12-11 | 2021-09-21 | 新乡化纤股份有限公司 | Cellulose fiber continuous spinning and ring adjusting device |
| CN216274477U (en) * | 2021-11-22 | 2022-04-12 | 江阴中绿化纤工艺技术有限公司 | 144-head spandex spinning channel |
| CN219157049U (en) * | 2022-11-21 | 2023-06-09 | 宁夏宁东泰和新材有限公司 | Lower blowing polyurethane fiber dry spinning channel |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE3424253A1 (en) * | 1983-02-25 | 1986-01-09 | Barmag Barmer Maschinenfabrik Ag, 5630 Remscheid | Spinning apparatus for chemical fibres with a blow-on box and spinning shaft |
| DE10229085A1 (en) * | 2002-06-28 | 2004-01-15 | Barmag Ag | Melt-spinning assembly to produce a multi-filament thread has a cooling shaft zone with a flexible surrounding ring |
| CN101092755A (en) * | 2007-07-06 | 2007-12-26 | 烟台氨纶股份有限公司 | Method for producing uniporous fine denier filament of urethane elastic fiber |
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| CN214244698U (en) * | 2020-12-11 | 2021-09-21 | 新乡化纤股份有限公司 | Cellulose fiber continuous spinning and ring adjusting device |
| CN216274477U (en) * | 2021-11-22 | 2022-04-12 | 江阴中绿化纤工艺技术有限公司 | 144-head spandex spinning channel |
| CN219157049U (en) * | 2022-11-21 | 2023-06-09 | 宁夏宁东泰和新材有限公司 | Lower blowing polyurethane fiber dry spinning channel |
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| CN117468102B (en) | 2024-04-12 |
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