CN107313116B - Exhaust device for wet spinning nozzle and using method thereof - Google Patents
Exhaust device for wet spinning nozzle and using method thereof Download PDFInfo
- Publication number
- CN107313116B CN107313116B CN201610264163.XA CN201610264163A CN107313116B CN 107313116 B CN107313116 B CN 107313116B CN 201610264163 A CN201610264163 A CN 201610264163A CN 107313116 B CN107313116 B CN 107313116B
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- frame
- spinneret
- gooseneck
- stock solution
- vibration
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- 238000000034 method Methods 0.000 title claims abstract description 26
- 238000002166 wet spinning Methods 0.000 title claims abstract description 23
- 238000009987 spinning Methods 0.000 claims abstract description 62
- 244000261422 Lysimachia clethroides Species 0.000 claims abstract description 43
- 239000011550 stock solution Substances 0.000 claims abstract description 42
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000001112 coagulating effect Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 2
- 238000010168 coupling process Methods 0.000 claims description 2
- 238000005859 coupling reaction Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 description 14
- 239000000243 solution Substances 0.000 description 5
- 239000000835 fiber Substances 0.000 description 4
- 230000015271 coagulation Effects 0.000 description 3
- 238000005345 coagulation Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229920000642 polymer Polymers 0.000 description 2
- 239000002243 precursor Substances 0.000 description 2
- 239000002904 solvent Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000000712 assembly Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 229920002239 polyacrylonitrile Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Images
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
- D01D4/00—Spinnerette packs; Cleaning thereof
-
- 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
- D01D1/00—Treatment of filament-forming or like material
- D01D1/10—Filtering or de-aerating the spinning solution or melt
- D01D1/103—De-aerating
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
- Y02P70/62—Manufacturing or production processes characterised by the final manufactured product related technologies for production or treatment of textile or flexible materials or products thereof, including footwear
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The invention provides an exhaust device for a wet spinning nozzle and a using method thereof, belonging to the field of wet spinning. The air discharge device for a wet spinning nozzle includes: the device comprises a vibration frame, a compressed air control system and a spinneret assembly fixing frame; at least one pneumatic vibrator is arranged on the vibration frame, and the compressed air control system is connected with the pneumatic vibrator; when the pneumatic vibrator vibrates, the vibrating frame is driven to resonate; at least one spinneret component fixing frame is arranged on the vibration frame, and a gooseneck is arranged on each spinneret component fixing frame; the spinneret is arranged at the lower end of the gooseneck; and a stock solution diversion trench is arranged on the front side of the vibration frame and is positioned below the spinning nozzle.
Description
Technical Field
The invention belongs to the field of wet spinning, and particularly relates to an exhaust device for a wet spinning nozzle and a using method thereof.
Background
The wet spinning method is a process of forming wet spinning nascent fibers by spraying spinning dope through a spinning nozzle immersed in a solvent by utilizing the principle that the high polymer is swelled before being dissolved, namely, the solvent permeates into the high polymer to increase the distance between macromolecules continuously and then is dissolved to form a uniform solution. The dope is subjected to preparatory processes before spinning, such as mixing, filtering and defoaming, so as to make the dope uniform in properties, wherein it is important to remove gel lumps and impurities entrained therein and remove bubbles in the dope.
When the spinning nozzle rises, spinning stock solution flows to the spinning plate through a pipeline on the component, air exists in the gooseneck, and the stock solution is mixed with the air when flowing, so that the spinning stock solution mixed with air bubbles during spinning is broken on the surface of the spinning plate, and broken filaments are formed. Because the number of the spinnerets which need to be installed is large, the spinnerets are usually directly led into the stock solution for online production during production, part of bubbles can be discharged along with the spinning stock solution, and if the bubbles are carried out by the flow of the stock solution alone, the time is as long as 2-4 hours, and a large amount of stock solution is consumed. Once the spinning solution flows out through the spinneret assembly and contacts with air, a compact layer is formed on the surface, spinning cannot be carried out, and the spinning solution can be only treated as loss. Moreover, the assembly pipeline still can remain the bubble, and these bubbles exist after the compression always, lead to the strand silk of producing to appear disconnected silk phenomenon because of the bubble breaks easily, and the spinneret is changed frequently, will seriously influence the quality of precursor.
Disclosure of Invention
The invention aims to solve the problems in the prior art and provides an exhaust device for a wet spinning nozzle and a using method thereof, which can remove bubbles attached in a gooseneck runner of the spinning nozzle, reduce the yarn breakage rate in production, improve the quality of protofilaments and save the stock solution.
The invention is realized by the following technical scheme:
an air discharge device for a wet spinning nozzle, comprising: the device comprises a vibration frame, a compressed air control system and a spinneret assembly fixing frame;
at least one pneumatic vibrator is arranged on the vibration frame, and the compressed air control system is connected with the pneumatic vibrator; when the pneumatic vibrator vibrates, the vibrating frame is driven to resonate;
at least one spinneret component fixing frame is arranged on the vibration frame, and a gooseneck is arranged on each spinneret component fixing frame; the spinneret is arranged at the lower end of the gooseneck;
and a stock solution diversion trench is arranged on the front side of the vibration frame and is positioned below the spinning nozzle.
The vibration frame comprises a frame, and 0-6 elastic supports are arranged below the frame.
When more than one gooseneck is arranged on the frame, all the goosenecks are uniformly distributed on the frame.
The stock solution guiding gutter is of a groove-shaped structure, and the bottom surface of the stock solution guiding gutter inclines from one end of the frame to the other end of the frame.
The frame upper end is equipped with the dead lever, every the one end and the gooseneck union coupling of spinning jet subassembly mount, the other end are equipped with U type draw-in groove, the dead lever on the frame is gone into to U type draw-in groove card, and is fixed through the jackscrew.
And the upper end of the gooseneck is provided with a stock solution inlet which is connected with a pressure tank filled with spinning stock solution at the front end.
The upper long edge and the lower long edge of the frame are respectively provided with a pneumatic vibrator, and the two pneumatic vibrators are positioned on the same straight line in the vertical direction;
the pneumatic vibrator is connected with the frame through threads.
The compressed air control system includes: the pneumatic vibrator comprises a compressed air source and an air source pipeline, wherein an air source regulating valve, a conversion joint and an air source tee joint are sequentially connected to the air source pipeline between the compressed air source and the pneumatic vibrator;
the air source pipeline is divided into two air source pipes after passing through the air source tee joint, one air source pipe is connected with the pneumatic vibrator above, and the other air source pipe is connected with the pneumatic vibrator below;
a pressure gauge is connected to the gas source pipeline between the gas source regulating valve and the adapter;
the pressure range of the compressed air source is as follows: 0.2-0.6MPa, vibration frequency of 5500-9000, and vibration time of 5-20 minutes corresponding to different frequency and different air pressure.
The use method of the device comprises the following steps:
(1) Before spinning begins, a gooseneck and a spinning nozzle are fixed on a frame through a spinning nozzle assembly fixing frame, a stock solution inlet above the gooseneck is connected with a pressure tank filled with spinning stock solution at the front end, and the lower end of the spinning nozzle is positioned above a stock solution diversion trench;
(2) After the gooseneck and the spinneret are filled with spinning stock solution, a compressed air control system is opened, a pneumatic vibrator drives a vibration frame to vibrate through resonance, the vibration frame drives the gooseneck and the spinneret to resonate, the stock solution flows into a stock solution diversion trench after being sprayed out of the spinneret, and air bubbles are discharged from the spinneret through vibration along with vibration;
(3) After vibration exhaust, mounting the exhausted gooseneck and the spinneret on a spinning line, and immersing the spinneret into a coagulating bath for spinning;
(4) After spinning, the number of bubbles in the gooseneck and the spinneret is increased, and the process returns to the step (1) before next spinning.
Compared with the prior art, the invention has the beneficial effects that: through resonance remove the residual bubble in the spinning dope in gooseneck and the spinneret fast, realized increasing the exhaust step to gooseneck and spinneret before the spinning, reduced the broken silk rate that arouses because of the bubble in the production, improved production efficiency, improved the precursor quality, and saved the dope.
Drawings
FIG. 1 is a schematic view showing the structure of a spinneret exhaust device for wet spinning according to the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
as shown in fig. 1, the air discharging device for a spinneret for wet spinning according to the present invention comprises: a set of vibration frame, a set of compressed air control system, a stock solution guiding gutter and a spinning nozzle component fixing frame.
The vibration rack contains: the frame and the elastic supports 10, the number of the elastic supports is 0-6, when the elastic supports are not arranged, the frame can resonate, but can cause large noise and displacement of the vibration frame, and the elastic supports mainly play a role in shock absorption.
The compressed air conditioning device includes: an air source regulating valve, a conversion joint, a pneumatic vibrator, an air source tee joint 4, an air source pipe and two pressure gauges. The stock solution guiding gutter 9 is installed at the front side of the frame. 1-6 groups of spinning nozzles 8, gooseneck pipes 6 and a fixing frame can be uniformly distributed on the frame, the fixing frame of the gooseneck pipe 6 is a clamping groove with a U-shaped groove, the U-shaped groove is clamped into a round rod on the frame, and then the round rod is fixed by a jackscrew.
The vibration exhaust device is provided with a compressed air conveying pipeline, two ends of the compressed air conveying pipeline are respectively connected with two compressed air source pipelines through the conversion of a tee joint 4 and are connected with one or two pneumatic vibrators 5, the pneumatic vibrators 5 are connected with the vibration frame through threads, the pneumatic vibrators 5 are arranged on two long sides of the fixed gooseneck, the position is preferably arranged in the center, and the pneumatic vibrators 5 can also be arranged on one side convenient to operate. And the tail end of the compressed air source pipeline 1 is connected with a conversion joint 3, and a pressure gauge is arranged between the conversion joint 3 and the air source regulating valve 2.
The compressed air pressure range of the vibration exhaust device is as follows: 0.2-0.6MPa, vibration frequency of 5500-9000, and vibration time of 5-20 minutes corresponding to different frequency and different air pressure. The vibration time is determined from the compressed air pressure, for example: when the vibration frequency is 5500 times under 0.2MPa, the exhaust time is 20 minutes; when the vibration frequency is 6800 times under 0.4MPa, the exhaust time is 15 minutes; 0.6MPa, 9000 times of vibration frequency, and 5 minutes of exhaust time.
Fibers for the wet spinning process include, but are not limited to: polyacrylonitrile fibers and polyvinyl alcohol fibers. The intrinsic viscosity of the stock solution is 1.4-2, the spinning temperature is 25-40 ℃, and the pressure is 1.8-4MPa.
The use method of the device comprises the following steps:
the installation of spinning head before will needing the spinning of production is fixed on vibration frame, lets in compressed air, makes vibration frame take place the vibration to make the spinning head take place the vibration, can get rid of the bubble of stoste in the spinneret gooseneck fast completely, during the vibration, the stoste flows into the guiding gutter after the spinning head blowout, and the bubble is along with vibrating from the spinning head discharge. The method specifically comprises the following steps:
(1) The gooseneck 6 and the spinning nozzle 8 are fixed on the frame through a fixing frame, a stock solution inlet 7 is arranged above the gooseneck 6 and connected with a pressure tank filled with spinning stock solution at the front end, and the lower end of the spinning nozzle 8 is positioned above the diversion trench 9.
(2) After the gooseneck 6 and the spinneret 8 are filled with the spinning solution, the vibration exhaust device is opened (namely, the air source regulating valve 2 is opened). The vibration exhaust device is provided with a compressed air conveying pipeline, two ends of the compressed air conveying pipeline are respectively connected with two compressed air source pipelines through a tee joint 4, the compressed air source pipelines are connected with two pneumatic vibrators 5, the pneumatic vibrators 5 which are in threaded connection start a vibration frame through resonance to drive spinning nozzle assemblies 6 and 8 on a frame to resonate, and the elastic support 10 plays a role in buffering and slows down impact of resonance on ground support. And after vibration exhaust, the gooseneck and the spinneret which are exhausted are installed on a spinning line, and the spinneret is immersed into a coagulating bath for spinning. And only after the shutdown, the goose neck tube and the spinneret are filled with air, and the goose neck tube and the spinneret are exhausted before the next production after bubbles are increased.
The technical effects of the present invention are illustrated by comparative experiments as follows:
comparative example: the gooseneck and spinneret were filled with a dope having an intrinsic viscosity of 1.7, the number of holes of the spinneret being 24000. The spinneret was immersed directly in the coagulation bath at a production speed of 25 m/min.
Example 1: the gooseneck and the spinneret are filled with spinning solution with the intrinsic viscosity of 1.4 and the temperature of 40 ℃, 1 group of spinnerets are fixed on a vibration frame, and the lower ends of the spinnerets are positioned above the diversion trench. The number of spinneret holes was 24000. Starting a vibration exhaust device, adjusting the pressure of compressed air, and exhausting for 15 minutes when the vibration frequency is 5500 times and 0.2 MPa; when the vibration frequency is 6800 times under 0.4MPa, the exhaust time is 10 minutes; 0.6MPa, 9000 times of vibration frequency, 10 minutes of air discharge time, and then the spinneret was immersed in a coagulation bath at a production speed of 25 m/min.
Example 2: the gooseneck and the spinneret were filled with the spinning dope having an intrinsic viscosity of 2 and a temperature of 25 ℃ and the number of holes of the spinneret was 24000. And 6 groups of spinning nozzles are fixed on a vibration frame, and the lower ends of the spinning nozzles are positioned above the diversion trenches. Starting a vibration exhaust device, adjusting the pressure of compressed air, and exhausting for 20 minutes when the vibration frequency is 5500 times and 0.2 MPa; when the vibration frequency is 6800 times under 0.4MPa, the exhaust time is 15 minutes; 0.6MPa, 9000 times of vibration frequency, 5 minutes of air discharge, and then immersing the spinneret in a coagulation bath at a production speed of 25 m/min.
The results are shown in table 1:
TABLE 1
As shown in Table 1, in the comparative example, without the step of adding the exhaust apparatus, the average dope loss amount reached 226.8 kg/group, and the strand breakage rate was 4.8%. After the exhaust device is added, in the embodiment 1, 207.8 kg of stock solution is saved, the stock solution saving proportion reaches 91.62%, and the average filament breakage rate is improved to 1.8%. In example 2, 211 kg of stock solution was saved per group, the stock solution saving ratio reached 93.03%, and the average filament breakage rate was increased to 2.2%. Therefore, after the step of the exhaust device is added, the amount of the stock solution lost in the exhaust process is greatly reduced, and the production cost is reduced. The broken filament rate in the production process is greatly improved, the production quality of the protofilament is improved, and the production efficiency is improved.
The above-described embodiment is only one embodiment of the present invention, and it will be apparent to those skilled in the art that various modifications and variations can be easily made based on the application and principle of the present invention disclosed in the present application, and the present invention is not limited to the method described in the above-described embodiment of the present invention, so that the above-described embodiment is only preferred, and not restrictive.
Claims (8)
1. An air discharge method for a wet spinning nozzle, characterized by: the method adopts an air exhaust device to exhaust air from a wet spinning nozzle, and the air exhaust device comprises: the device comprises a vibration frame, a compressed air control system and a spinneret assembly fixing frame;
at least one pneumatic vibrator is arranged on the vibration frame, and the compressed air control system is connected with the pneumatic vibrator; when the pneumatic vibrator vibrates, the vibrating frame is driven to resonate; the vibratory frame comprises a frame;
at least one spinneret component fixing frame is arranged on the vibrating frame, and a gooseneck is arranged on each spinneret component fixing frame; the spinneret is arranged at the lower end of the gooseneck; the upper end of the gooseneck is provided with a stock solution inlet;
a stock solution diversion groove is arranged on the front side of the vibration frame and is positioned below the spinning nozzle;
the method comprises the following steps:
(1) Before spinning begins, a gooseneck and a spinning nozzle are fixed on a frame through a spinning nozzle assembly fixing frame, a stock solution inlet above the gooseneck is connected with a pressure tank filled with spinning stock solution at the front end, and the lower end of the spinning nozzle is positioned above a stock solution diversion trench;
(2) After the gooseneck and the spinneret are filled with spinning stock solution, a compressed air control system is opened, a pneumatic vibrator drives a vibration frame to vibrate through resonance, the vibration frame drives the gooseneck and the spinneret to resonate, the stock solution flows into a stock solution diversion trench after being sprayed out of the spinneret, and air bubbles are discharged from the spinneret through vibration along with vibration;
(3) After vibration exhaust, mounting the exhausted gooseneck and the spinneret on a spinning line, and immersing the spinneret into a coagulating bath for spinning;
(4) After spinning, the number of bubbles in the gooseneck and the spinneret is increased, and the process returns to the step (1) before next spinning.
2. The air discharge method for a wet spinning nozzle according to claim 1, characterized in that: 0-6 elastic supports are arranged below the frame.
3. The air discharge method for a wet spinning nozzle according to claim 2, characterized in that: when more than one gooseneck is arranged on the frame, all the goosenecks are uniformly distributed on the frame.
4. The air discharge method for a wet spinning nozzle according to claim 3, characterized in that: the stock solution diversion trench is of a groove-shaped structure, and the bottom surface of the stock solution diversion trench inclines from one end of the frame to the other end of the frame.
5. The air discharge method for a wet spinning nozzle according to claim 4, characterized in that: the frame upper end is equipped with the dead lever, every the one end and the gooseneck union coupling of spinning jet subassembly mount, the other end are equipped with U type draw-in groove, the dead lever on the frame is gone into to U type draw-in groove card, and is fixed through the jackscrew.
6. The air discharge method for a wet spinning nozzle according to claim 5, characterized in that: the stock solution inlet is connected with a pressure tank filled with spinning stock solution at the front end.
7. The air discharging method for a wet spinning nozzle according to claim 6, wherein: the upper long edge and the lower long edge of the frame are respectively provided with a pneumatic vibrator, and the two pneumatic vibrators are positioned on the same straight line in the vertical direction;
the pneumatic vibrator is connected with the frame through threads.
8. The air discharge method for a wet spinning nozzle according to claim 7, characterized in that: the compressed air control system comprises a compressed air source and an air source pipeline, and an air source regulating valve, a conversion joint and an air source tee joint are sequentially connected to the air source pipeline between the compressed air source and the pneumatic vibrator;
the air source pipeline is divided into two air source pipes after passing through the air source tee joint, one air source pipe is connected with the pneumatic vibrator above, and the other air source pipe is connected with the pneumatic vibrator below;
a pressure gauge is connected to the gas source pipeline between the gas source regulating valve and the adapter;
the pressure range of the compressed air source is as follows: 0.2-0.6MPa, vibration frequency of 5500-9000, and vibration time of 5-20 minutes corresponding to different frequency and different air pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610264163.XA CN107313116B (en) | 2016-04-26 | 2016-04-26 | Exhaust device for wet spinning nozzle and using method thereof |
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|---|---|---|---|
| CN201610264163.XA CN107313116B (en) | 2016-04-26 | 2016-04-26 | Exhaust device for wet spinning nozzle and using method thereof |
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| CN107313116B true CN107313116B (en) | 2023-04-07 |
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| CN103949092A (en) * | 2014-04-22 | 2014-07-30 | Tdk大连电子有限公司 | De-foaming and recycling system and process |
| CN104328513A (en) * | 2014-11-20 | 2015-02-04 | 苏州金纬化纤工程技术有限公司 | Plate-cleaning device for spinneret plate |
| CN204401170U (en) * | 2014-12-25 | 2015-06-17 | 泉州天宇化纤织造实业有限公司 | A kind of exhaust apparatus of waste silk collection system |
| CN204709496U (en) * | 2015-05-08 | 2015-10-21 | 四川大学华西医院 | Blood perfusion device with vibration device |
| CN204684343U (en) * | 2015-06-04 | 2015-10-07 | 陶琦 | A kind of gas-tight alveolitoid transfusion device |
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