KR20220107285A - High uniformity ultra-fine polyester fiber production equipment and manufacturing method thereof - Google Patents

Abstract

The present invention relates to a production facility for ultra-fine polyester fibers with high uniformity and a method for manufacturing the same. The production equipment includes a spinning box, a DIO spinning assembly, a ring blowing cooling device, a focused oiling device, a spinning barrel, a preliminary interlacer, a drafting hot roller, a shaping hot roller, a main interlacer and a winder. A yarn stabilization device is installed between the drafting hot roller and the shaping hot roller. The yarn stabilizing device is equipped with an upper housing, a lower housing, a disc (3), an L-shaped quick insert (5), a stainless steel pipe (4), a waste discharge pipe (14) and a sliding mechanism. The method uses polyester melt as spinning raw material, sequentially spinning box, DIO spinning assembly, ring blowing cooling device, focused oiling device, spinning barrel, preliminary interlacer, drafting hot roller, yarn stabilizing device, shaping hot roller , through a main interlacer and a winder to produce a highly uniform ultra-fine polyester fiber. In addition, the pressure in the yarn stabilization device is 0.2 to 0.4 bar. The method of the present invention receives heat uniformly on two hot rollers and has an excellent drafting shaping effect, so that a highly uniform ultrafine polyester is produced.

Description

High uniformity ultra-fine polyester fiber production equipment and manufacturing method thereof

The present invention relates to the field of polyester fiber technology, and more particularly, to a high uniformity ultra-fine polyester fiber production equipment and a method for manufacturing the same.

As China's economy developed, the demand for chemical fibers for clothing, decoration and industrial use increased. Polyester differentiated fiber fabrics have excellent performance, a wide range of uses, and are developing rapidly. The increase in total market demand and the differentiation of downstream textile enterprises. The demand for fine and ultrafine fibers stimulated the growth of Chinese chemical fiber enterprises. Fine fineness and lowered linear density gave ultrafine fibers and their textiles superior performance than conventional and even natural fibers. Melt Direct Spinning 5D~7D/6F~8F Ultra-fine polyester fiber fabric has excellent properties such as soft feel, delicate, smooth, glossy, high density and high thermal insulation properties. In addition, as weaving and printing technology advances, more and more potential properties are increasingly being discovered. The fiber has many advantages, such as light, soft, anti-pilling, easy to manage, high density, and breathable. By mixing this with a fibrous metal wire to form a metal fiber, adhesion and sewing can be performed, and it is easy to shield the radiation source by making it in different geometric shapes (eg, conductive foam, conductive film). In addition, it is possible to protect the worker from electromagnetic radiation by sewing with a shielding suit, a shielding hat, etc. It is currently attracting people's attention and is being classified as a new material. Its main features are: (1) The shielding efficiency is high and the use range is wide. (2) The fabric is light and thin, has a firm texture, is comfortable to wear, and has excellent hygroscopicity and dissipation, so it has excellent wearing performance. The thin fabric doesn't take up much space, so you can put it right in your pocket or bag when not in use. (3) Washing method is the same as general fabrics, and the shielding properties do not change even after repeated washing, so it is easy to wash. In addition, the fabric may be used for chips of electronic products such as cell phone circuit boards.

5D~7D/6F~8F High uniformity ultra-fine polyester fiber has extremely fine total linear density and a small number of holes and a small amount of spun holes. The heat generated from the melt is low and the temperature of the spinneret surface is low, which is not advantageous for spinning. In the prior art, the primary fiber, in which the ring blowing cooling air descends from the DIO assembly, has a high process air pressure, so that turbulence is formed between the two yarns, and the yarns are greatly shaken, which mutually affects the cooling effect. When the amount of air decreases, the entire yarn shakes, the aperture is unstable, the oil nozzle temperature is high, the filament is easily broken, and the uniformity value is also increased. 13 and 14, in the prior art, there is only one yarn separation ceramic sheet 43 in the middle of the winding, drafting and shaping hot rollers. The yarn 42 is severely shaken in the yarn separation device during drafting shaping and the yarn 42 is likely to bounce off the yarn separation ceramic sheet 43 and enter another yarn path. As the two yarns coalesce, the heat on the hot roller becomes non-uniform and less stable. Therefore, it is difficult to produce the product by the conventional spinning hole design, cooling ring blowing, oil ring device and winding method. Even in the production of ultra-fine polyester fibers, the burst strength irregularity (CV), elongation irregularity rate at break (CV), and yarn irregularity rate (CV) are large, so the internal quality of the fiber is unstable. effectiveness may decrease. Therefore, it can only be used for general anti-radiation clothing and decoration of buildings, and cannot achieve true shielding effect.

It is an object of the present invention to provide a high uniformity ultra-fine polyester fiber production equipment and a method for manufacturing the same in order to solve the above problems existing in the prior art. The high uniformity ultrafine polyester fiber production equipment provided by the present invention adopts a special spinning micropore arrangement method, a ring blowing cooling method, a focused oil ring yarn guide device and a yarn stabilization device, and 5D~7D/6F~8F ultrafine fibers It aims to solve problems such as cooling, oil ring non-uniformity, low production stability and open-end difficulty.

In order to achieve the above object, the present invention adopts the following technical solutions.

The production equipment of high uniformity ultrafine polyester fiber includes spinning box, DIO spinning assembly, ring blowing cooling device, focusing oiling device, spinning barrel, spare interlacer, drafting hot roller, shaping hot roller, main interlacer and winder. and a yarn stabilization device is installed between the drafting hot roller and the shaping hot roller.

The yarn stabilization device includes an upper housing, a lower housing, a disc, an L-shaped quick insert, a stainless steel tube, a dirt discharge tube and a sliding mechanism. The upper housing is a semicylindrical body I(1) with the rectangular side I facing down, the lower housing is a semicylindrical body II with the rectangular side II facing up, and the rectangular side I and the semicylindrical body of the semicylindrical body I(1) are semicylindrical. The rectangular faces II of II(2) have the same width and a length ratio of 1:1.6 (this length is to ensure that the upper housing is always in the upper housing while sliding). The rectangular face I of the semi-cylindrical body I and the rectangular face II of the semi-cylindrical body II are oppositely installed and both are parallel to the horizontal plane, and the left side of the semi-cylindrical body II is fixed on the circular surface of the disk by a bolt, and the circular surface is a semi-cylindrical To the left of body I.

One through hole is installed on the original surface of the disk, and the L-type quick insert passes through the through hole and communicates with the stainless steel pipe.

The position limiting block is fixedly installed on the right side of the semi-cylindrical body II, and the position limiting pin is fixed on the position limiting block, the edge of the rectangular face I on the right side of the semi-cylindrical body I forms a concave groove B, and the position limiting pin is It is matched with the concave groove B and is used to fix the semi-cylindrical body I.

The internal structure of semi-cylindrical body I is as follows. That is, in the semi-cylindrical body I, a stainless steel pipe is provided to pass through, and a cylindrical through hole moving along the horizontal direction, a rectangular groove communicating with the cylindrical through hole, and an annular groove communicating with the cylindrical through hole are installed, and the rectangular groove is a cylindrical It is located below the type through hole, the bottom of the rectangular groove is located on the rectangular surface I, and n through holes are installed on the bottom of the rectangular groove, the annular groove is located at one end close to the disk of the cylindrical through hole, and the O-ring It is used to seal the stainless steel pipe by mounting it (at this time, the sealing prevents the air pressure from the stainless steel pipe from escaping from the left end of the stainless steel pipe, saving energy source).

The ratio of the length of the stainless steel tube to the length of the rectangular side I is 1:1 to 1.12 (when the upper housing slides to the leftmost end, the length is to make the stainless steel tube sealed by the plug). A plug is installed at one end far from the circular plate of the cylindrical through hole, and one end of the plug and the stainless steel pipe faces each other, and is used to seal the stainless steel pipe.

The internal structure of the semi-cylindrical body II is as follows. In the rectangular surface II of the semi-cylindrical body II, a point at a certain distance (a certain distance 15 mm) from the edge of the rectangular surface II forms a concave groove A so as to be concave inward, and a base is provided in the concave groove A. The upper surface of the base forms n evenly distributed smooth arcuate concave grooves, and the central axis of the smooth arcuate concave groove is parallel to the short side of the rectangular surface II and penetrates the upper surface of the base, and the opening width of the smooth arcuate concave groove is 1 to 2 mm. At the edge points of the two long sides of the rectangular face II, n yarn guide hooks a and n yarn guide hooks b are installed oppositely, and the yarns sequentially enter the yarn passing channel of the yarn guide hook a, the center of the smooth arcuate recess and the yarn The yarn path formed through the yarn passing channel of the guide hook b is straight. On the base, both sides perpendicular to the groove opening direction of the smooth arcuate concave groove and the opposite inner wall of the concave groove A form a channel H while maintaining a constant distance. When compressed air is blown into the smooth arcuate concave yarn, the yarn vibrates and the yarn guide hook a and yarn guide hook b function to stabilize the yarn.

The n yarn guide hook a and the n yarn guide hook b and the edge points of the two long sides of the rectangular side II are fixed by adopting the yarn guide hook frame, and the yarn guide hook frame and the rectangular side II are fixed by using the bolts. .

The sliding mechanism consists of a guide rail G installed on the two long sides of rectangular face II, respectively (guide rail length is 60% of the long side of rectangular face II), and a guide rail C (guide rail C installed on the left end of the two long sides of rectangular face I, respectively). The rail length is 30% of the long side of the rectangular face I) and a U-shaped pull rod, and two long-side halves of the U-shaped pull rod are inserted into the guide rail G, and the other half is inserted into the guide rail C, U A blocking block extending outward is installed at the left end of the type pull rod to realize sliding toward the right of the semi-cylindrical body I.

The relative positional relationship between the semi-cylindrical body I and the semi-cylindrical body II is as follows. That is, when the position limiting pin and the concave groove B on the right side of the semi-cylindrical body I match, the n through holes and n smooth arcuate concave grooves on the bottom plate in the rectangular groove correspond one-to-one, respectively, at the top of the smooth arcuate concave groove. Located.

The waste discharge device includes a waste discharge pipe and a channel H, and the waste discharge pipe is installed in the lower housing and communicates with the channel H.

The central point of the arcuate surface of the semi-cylindrical body II fixes the fixing block, and the fixing hole is installed on the fixing block, and the hexagonal screw is used to penetrate the fixing hole to fix the lower housing on the support of the shaping hot roller. . One positioning hole is provided on both sides of the fixing block, and the yarn stabilizing device is fixed on the support of the shaping hot roller base through the fixing hole and the hexagon screw.

Open end: Push the left side of the upper housing to the right side to bring it closer to the disk, and the right end of the stainless steel pipe and the plug at the right end of the upper housing are in contact. At this time, the compressed air in the stainless steel pipe cannot flow into the channel in the upper housing, and the left end of the open end pull rod moves along the track to the right end of the upper housing when pushing the left along the upper cylindrical body, and the upper semi-cylindrical body lock the After the yarn exits the drafting roller, it passes over the open-end pull rod and sequentially enters the forming hot roller through the yarn guide hook a, the smooth arcuate recess, and the yarn guide hook b.

In production: the upper housing is pulled to the right through a U-shaped pull rod, and the stainless steel tube and plug are removed. The concave groove B on the upper housing matches the position limiting block and the position limiting pin on the lower housing, fixing the upper semi-cylindrical body I. Compressed air delivered from the compressed air station enters the upper housing via a stainless steel rod and passes through a smooth arcuate concave yarn through an aperture on the rectangular face I of the semi-cylindrical body I. It further improves the cohesiveness of the yarn by allowing the yarn to produce light and fine twists and turns. It enhances the running stability between drafting shaping hot rollers, reduces yarn shaking, and discharges a small amount of oil, which is dropped off during twisting and winding, from the left side waste pipe through channel H on both sides of the nozzle.

A preferred technical solution is as follows.

In the production equipment of the high uniformity ultrafine polyester fiber as described above, the yarn stabilizing device further includes a positioning mechanism.

The constraining mechanism includes one counterclockwise 90° rotating L-shaped track and an open-ended pull rod.

The L-shaped track is located on the arch surface of the semi-cylindrical body I, the left section of the L-shaped track overlaps the left side of the semi-cylindrical body I, the right section of the L-shaped track overlaps the right side of the semi-cylindrical body I, and the rectangular plane In the direction perpendicular to I, the left end of the L-shaped track is lower than the right end of the L-shaped track, and the transverse side of the L-shaped rotated 90° counterclockwise is parallel to the long side of the rectangular surface I, and the long side and The vertical side of the L-shape, which maintains a constant distance (a constant distance is 5mm) and rotates 90° counterclockwise, is inclined.

One end of the open-end pull rod is located in the L-shaped track, and the other end is fixed on the right side of the semi-cylindrical body II.

In the production equipment of the high uniformity ultrafine polyester fiber as described above, the yarn guide hook a is a snail-shaped yarn guide hook, and the yarn guide hook b is a double arcuate yarn guide device. The value of n is 1 to 48.

In the production equipment of high uniformity ultrafine polyester fiber as described above, the snail-shaped yarn guide hook is a left-hand snail-shaped yarn guide hook and a right-hand snail-shaped yarn guide hook, the quantity is n/2, respectively, and the left-hand snail-shaped yarn The guide hook and the right hand snail-shaped yarn guide hook are installed crosswise. Prevents yarn from bouncing off the yarn guide hooks.

In the production facility of high uniformity ultrafine polyester fiber as described above, a circular spinneret is installed in the DIO spinning assembly, and a concave groove is formed on the radial direction of the raw surface in which the spinning micropore (exit hole) of the circular spinneret is located. installed, the radiation micropores on both sides of the concave groove are symmetrically distributed with respect to the recessed groove, and the radiation micropores on both sides are all arranged in an isosceles triangle. In the prior art, the yarn cooling uniformity is superior to that in which the spun fine pores are arranged in a circular shape, and the effect of the plate surface temperature is relatively small.

In the production facility of the high uniformity ultrafine polyester fiber as described above, the number of fine spun pores on each side is 6, and the number of fine spun pores located on an isosceles triangle is the same.

In the production equipment of the high uniformity ultrafine polyester fiber as described above, the ring blowing cooling device includes a ring blowing box and a ring blowing filter core corresponding one-to-one with a spinneret therein.

The ring blowing box is divided into a first area and a second area by a separator perpendicular to the tow travel direction, and the first area and the second area independently connect two cooling air inlet pipes. The air pressure in the weak cooling zone I and the cooling zone II is independently controlled by the air pressure in the cooling air inlet pipe.

The region corresponding to the first region in the ring blowing filter core is the weak cooling region I, and the region corresponding to the second region in the ring blowing filter core is the cooling region II. One hollow rectangular plate parallel to the tow travel direction is installed in the center of the ring blowing filter core, and several holes are installed on the tow-facing side of the hollow rectangular plate, so that the mutual interference of cooling air between the two tows in the ring blowing filter core used to weaken

One side corresponding to the thickness direction of the hollow rectangular plate is provided in the concave groove on the circular spinneret. Compared to the prior art, the spinneret plate surface is prevented from being affected by ring blowing, the plate surface temperature is lowered, and abnormalities such as coarse head filaments are prevented from occurring, and the mutual interference of the cooling air between the two yarns in the filter core is reduced, so that the yarn is filtered. The difference in structure and performance between fibers is small by allowing stable operation within the core and uniform cooling.

In the production facility for the high uniformity ultra-fine polyester fiber as described above, the height ratio of the first region and the second region is 1:2.5 to 3.0, and the ratio of the thickness of the hollow rectangular plate to the widest width of the concave groove is 1:1.3 to 1.5.

In the production equipment for the high uniformity ultrafine polyester fiber as described above, the focused oiling device is a spiral full contact micropore oiling device.

The spiral full contact micropore oiling device includes a sequentially connected oil pipe, a quick insert, a metal connecting rod and a spiral ceramic member structure, wherein the metal connecting rod is mounted on the radial position oil frame, and the metal connecting rod is 1 hollow channel is provided, a second hollow channel is provided in the spiral ceramic member structure, the second hollow channel communicates with the first hollow channel, the spiral portion of the spiral ceramic member structure is a yarn passing channel, One side close to the yarn passage channel forms an inclined surface, and multiple layers of annular oil collecting grooves and oil drain holes are installed on the inclined surface. distributed to surround, the oil discharge hole communicates with the second hollow channel, and the oil collection groove has a wave pattern annular structure.

In the production equipment of the high uniformity ultrafine polyester fiber as described above, the length of the metal connecting rod is 3 to 4 cm, the diameter of the first hollow channel is 3 to 5 mm, and the diameter of the second hollow channel is 3 to 5 mm. and the pore diameter of the oil discharge hole is 0.3 to 0.5 mm, the annular oil collecting groove of several layers is an annular oil collecting groove of 10 to 15 layers, the wave-patterned wave and ripple fall values are 0.003 to 0.05 mm, and the yarn passing channel The pore diameter is 1 to 2 mm.

The method for producing high uniformity ultrafine polyester fibers by adopting the production equipment for high uniformity ultrafine polyester fibers as described above uses a polyester melt as a spinning raw material, and sequentially includes a spinning box, a DIO spinning assembly, a ring After passing through a blowing cooling device, a concentrating oiling device, a spinneret, a preliminary interlacer, a drafting hot roller, a yarn stabilizing device, a shaping hot roller, a main interlacer and a winder, a highly uniform ultrafine polyester fiber is manufactured.

The pressure in the yarn stabilization device is 0.2 to 0.4 bar.

The specific process is as follows.

(1) After metering the polyester melt with a metering pump, it is evenly distributed to the DIO assembly in the melt pipeline and extruded from the spinning hole on the spinneret to form primary fibers.

(2) Cool molding. The primary fiber extruded from the spinning hole is cooled and molded through a ring blowing cooling device.

(3) Focus oiling. The cold-formed fiber tow is oiled and wetted through an oiling device.

(4) Wind-up molding. After being oiled, the fibers are passed through a barrel to oil the yarn more evenly in a pre-interlacer before entering the drafting hot rollers. When going through the yarn stabilization device, the compressed air delivered from the compressed air station enters the stainless steel rod through the quick insert, and in the stainless steel rod enters into the aperture in the yarn stabilization device semi-cylindrical body I. It is again blown through the n through holes on the bottom plate in the rectangular grooves in the through holes to pass the yarns in the smooth arcuate grooves. After the yarn is light and finely twisted and wound, it is introduced into the shaping hot roller, drafted and shaped, then wound through an interlacer, and then wound into a yarn cake through a winder.

In the method for producing the above-described highly uniform ultrafine polyester fiber, the spinning process parameters are that the air pressure in the weak cooling zone I is 5 to 10 Pa, and the air pressure in the cooling zone II is 15 to 20 Pa.

In the method for producing the above-mentioned high uniformity ultrafine polyester fiber, the spinning process parameters are that the micropore diameter of the spinneret is 0.16 to 0.19 mm, the length is 0.5 to 0.6 mm, the extrusion temperature is 286 to 292 ° C, and the de The rafting hot roller speed is 1200 to 1500 m/min, the drafting hot roller temperature is 82 to 88 ° C, the shaping hot roller speed is 3900 to 4200 m/min, the shaping hot roller temperature is 110 to 118 ° C, and the winding speed is It further includes 3800 to 4100 m/min.

In the method for producing the above-mentioned high uniformity ultrafine polyester fiber, the index of the high uniformity ultrafine polyester fiber is that the linear density is 5.5 to 7.6 dtex, the linear density non-uniformity (CV) is ≤0.6%, and the burst strength is ≥ 4.1 cN/dtex, burst strength nonuniformity (CV) is ≤2.0%, elongation at break is 25.5 to 33.5%, elongation at break (CV) is ≤5.0%, and yarn nonuniformity (CV) is ≤0.82 %, the specific shrinkage ratio is 7.7 to 9.3%, and the oiling ratio is 1.0 to 1.18%.

The principle of the present invention is as follows.

The ultrafine fibers prepared in the present invention have a low total linear density and a low yarn pull-out tension. In addition, the drafting and shaping hot roller spacing is relatively large, and the yarn is easily subjected to the interference of the external airflow between the drafting and shaping hot rollers, so that the shaking is relatively large. In the prior art, the comb-shaped yarn separation device cannot stabilize the yarn because it only performs a yarn separation function. During open-end operation, the yarn shake is large and the yarn cannot be separated. The yarn stabilizing device of the present invention further improves the cohesiveness of the yarn, increases the running stability between the drafting shaping hot rollers, and reduces the yarn shake, so that the open end operation is simple and the ultrafine fiber yarn uniformity is excellent. The rupture drawing non-uniformity (CV) and rupture strength non-uniformity (CV) are small, the production is stable, and the product quality is high.

In addition, the present invention is installed in the upper and lower two regions within the ring blowing box. A filter core is installed in the ring blowing box, and a rectifier plate is added to the filter core. The filter core is installed in two areas, upper and lower, respectively, corresponding to two areas in the air box. 5D~7D/6F~8F Since the fiber total linear density is extremely fine, the monofilament linear density is thick. In the prior art, when the primary fiber ejected from the spinneret is cooled through the ring blowing filter core, a relatively high air pressure must be set to cool the yarn. However, due to the small total number of holes, it is very easy for cooling air to penetrate the yarn, and it is very easy to affect the other yarn bundles in the filter core, causing the yarn to fluctuate significantly and non-uniform primary fiber cooling. The present invention adopts a cooling method of dividing regions. A stainless steel baffle plate is added to the filter core, cooling is divided into two independent areas, and when cooling two bundles of yarn in the filter core, there is little mutual interference, so that the yarn runs stably in the filter core and the cooling is uniform.

In addition, the oiling yarn guide device in the present invention adopts a focused oiling and a method of guiding the yarn to be integrally concentrated, thereby oiling and wetting the yarn. At the same time, it adopts a spiral structure oil ring device to reduce the number of friction between the yarn and the yarn guide ceramak member, and adopts a multi-layer oil collecting groove design to reduce the unevenness of the oil ring due to the difference between the yarn tension on both sides of the yarn. It greatly improves the uniformity and tension stability, increasing the product quality and lowering the production cost.

Advantageous effects of the present invention are as follows.

(1) The high uniformity ultra-fine polyester fiber production equipment of the present invention has excellent cooling uniformity in which the spinning micropores on the spinneret are arranged in an isosceles triangle.

(2) In the high uniformity ultra-fine polyester fiber production facility of the present invention, a baffle plate is provided at the center of the ring blowing filter core. The top of the baffle plate is inserted into the concave groove of the spinneret central axis to prevent the plate surface of the spinneret from being affected by ring blowing, and to prevent the occurrence of abnormalities such as a low plate surface temperature and a thick head filament, and Reducing the mutual indirection of cooling air between the yarns ensures that the yarns run reliably within the filter core and are cooled evenly.

(3) The high uniformity ultra-fine polyester fiber production equipment of the present invention combines two devices of a yarn guide and an oil ring into one to reduce or eliminate static electricity with a full-contact spiral 360° oil ring, spinning and winding tension It reduces the fluctuation of the oil ring, greatly improves the oil ring uniformity and tension stability, improves the product quality and lowers the production cost.

(4) The manufacturing method of the high uniformity ultra-fine polyester fiber of the present invention is simple, and the manufactured high uniformity ultra-fine polyester fiber has excellent electromagnetic wave shielding effect and linear density non-uniformity (CV) after being blended with metal yarn. It is small and has good yarn and dyeing uniformity.

(5) The method for producing a high uniformity ultrafine polyester fiber of the present invention uses a yarn stabilization device between drafting shaping hot rollers, and blows compressed air in a stainless steel pipe through a through hole into the yarn, thereby causing slight twisting of the yarn and By creating a winding, the cohesion of the yarn is further improved. High-uniformity ultra-fine polyester fiber is manufactured by improving the running stability between the drafting shaping hot rollers, reducing yarn shake, and having an even heat on the two hot rollers, resulting in an excellent drafting shaping effect.

1 is a structural diagram of a yarn stabilizing device according to the present invention.
2 is a structural diagram of the yarn stabilizing device according to the present invention at the open end.
3 is a structural diagram during production of a yarn stabilizing device according to the present invention;
4 is a structural diagram of a yarn guide hook a according to the present invention.
5 is a structural diagram of a yarn guide hook b according to the present invention.
6 is a structural diagram of a U-shaped pull rod according to the present invention.
7 is a structural diagram of an open-end pull rod according to the present invention.
8 is a schematic view of a smooth arcuate recess and base according to the present invention;
9 is a structural diagram of a ring blowing apparatus according to the present invention.
10 is an overall structural diagram of a focused oiling device according to the present invention.
11 is a structural diagram of a spiral ceramic member in the converging oiling device according to the present invention.
12 is a diagram illustrating a distribution structure of a spinneret on a spinneret according to the present invention.
13 is an overall structural diagram of a prior art yarn separation device according to the present invention.
14 is a partially enlarged structural diagram of a yarn separation device in the prior art according to the present invention.

Hereinafter, the present invention will be described in more detail with reference to specific examples. The above examples are for illustrating the present invention, and do not limit the scope of the present invention. In addition, those skilled in the art to which the present invention pertains may make various changes or modifications to the present invention after reading the above content, and all such changes or modifications fall within the scope defined by the appended claims of the present application. should understand

The production equipment of high uniformity ultrafine polyester fiber includes spinning box, DIO spinning assembly, ring blowing cooling device, focusing oiling device, spinning barrel, spare interlacer, drafting hot roller, shaping hot roller, main interlacer and winder. and a yarn stabilization device is installed between the drafting hot roller and the shaping hot roller.

1 to 3, the yarn stabilization device includes an upper housing, a lower housing, a disc (3), an L-shaped quick insert (5), a stainless steel pipe (4), a waste discharge pipe (14), a sliding mechanism and a position limiter. includes mechanisms. The upper housing is a semicylindrical body I(1) with the rectangular side I facing down, the lower housing is a semicylindrical body II(2) with the rectangular side II facing up, and the rectangular side I of the semicylindrical body I(1) is The rectangular faces II of the semi-cylindrical body II(2) have the same width, and the length ratio is 1:1.6. The rectangular face I of the semi-cylindrical body I(1) and the rectangular face II of the semi-cylindrical body II(2) are installed opposite to each other and are both parallel to the horizontal plane, and the left side of the semi-cylindrical body II(2) is a disk (3) by a bolt. is fixed on a circular plane of , which plane faces to the left of the semi-cylindrical body I(1).

One through hole is installed on the original surface of the disk 3 , and the L-shaped quick insert 5 passes through the through hole and communicates with the stainless steel pipe 4 .

A position restriction block 10 is fixedly installed on the right side of the semi-cylindrical body II(2), a position restriction pin 11 is fixed on the position restriction block 10, and a rectangular surface on the right side of the semi-cylindrical body I(1) The edge of I forms a concave groove B (20), and the position limiting pin (11) is matched with the concave groove B (20).

The internal structure of the semi-cylindrical body I(1) is as follows. The stainless steel pipe 4 is provided to pass therethrough, and a cylindrical through hole 17 moving along the horizontal direction, a rectangular groove 19 and an annular groove 18 communicating with the cylindrical through hole are installed, and the rectangular groove 19 is Located below the cylindrical through hole, the bottom of the rectangular groove 19 is located on the rectangular surface I, on the bottom of the rectangular groove 19 (that is, the rectangular surface I) is provided with n through holes 21, the annular groove (18) is located at one end close to the disk (3) of the cylindrical through hole (17), and is used to seal the stainless steel pipe (4) by mounting an O-shaped ring.

The ratio of the length of the stainless steel pipe 4 to the length of the rectangular surface I is 1:1 to 1.12. A plug is installed at one end far from the disk 3 of the cylindrical through hole 17 , and one end of the plug and the stainless steel pipe 4 faces each other, and is used to seal the stainless steel pipe 4 .

In the rectangular face II of the semi-cylindrical body II(2), a point at a certain distance (a certain distance 15mm) from the edge of the rectangular face II forms a concave groove A so as to be concave inward, and the base 6 is formed in the concave groove A. install The upper surface of the base 6 forms n smooth arcuate concave grooves 7 (as shown in Fig. 8) uniformly distributed, and the central axis of the smooth arcuate concave groove 7 is the short side of the rectangular surface II. The opening width of the smooth arcuate concave groove 7 parallel to and penetrating the upper surface of the base 6 is 1 to 2 mm. At the edge points of the two long sides of the rectangular face II, n yarn guide hooks a(8) and n yarn guide hooks b(9) are installed to face each other, and the yarns sequentially enter the yarn passage channel of the yarn guide hook a(8). , the yarn path forming through the center of the smooth arcuate recess (7) and the yarn passing channel of the yarn guide hook b (9) is a straight line. On the base 6, both sides of the smooth arcuate concave groove perpendicular to the groove opening direction and the opposite inner wall of the concave groove A form a channel H while maintaining a constant distance. The n yarn guide hook a(8) and n yarn guide hook b(9) and the edge points of the two long sides of the rectangular face II are fixed with the yarn guide hook frame, and the yarn guide hook frame and the rectangular face II are bolted together. Fix it. 4 and 5, the yarn guide hook a(8) is a snail-shaped yarn guide hook, and the yarn guide hook b(9) is a double arcuate yarn guide device. The snail-shaped yarn guide hook is a left-hand snail-shaped yarn guide hook and a right-hand snail-shaped yarn guide hook, the quantity is each n/2, the left-hand snail-shaped yarn guide hook and the right-hand snail-shaped yarn guide hook are installed crosswise. The value of n is 1 to 48.

The sliding mechanism consists of a guide rail G(12) installed on the two long sides of the rectangular face II, respectively (the guide rail length is 60% of the long side of the rectangular face II), and a guide rail installed on the left end of the two long sides of the rectangular face I, respectively. C (guide rail length is 30% of the long side of the rectangular side I) and a U-shaped pull rod 13 (as shown in Fig. 6), and the two long sides of the U-shaped pull rod 13 are half Inserted into the guide rail G (12), the other half is inserted into the guide rail C, the left end of the U-shaped pull rod (13) is provided with a blocking block extending outward, the semi-cylindrical body I (1) Implements sliding to the right.

When the position limiting pin 11 and the concave groove B 20 on the right side of the semi-cylindrical body I (1) are matched, n through holes 21 and n smooth arcuate concave grooves on the bottom plate in the rectangular groove 19 (7) corresponds one-to-one and is located in the upper chamber of each smooth arcuate concave groove (7).

The waste discharge device includes a waste discharge pipe 14 and a channel H, and the waste discharge pipe 14 is installed in the lower housing and communicates with the channel H.

An arcuate fixing block 15 is fixed at the center point of the arcuate surface of the semi-cylindrical body II, a position fixing hole is installed on the arcuate fixing block 15, and a hexagonal screw 16 is adopted to penetrate the position fixing hole to the lower part Fix the housing onto the bottom support of the orthopedic hot roller.

The positioning mechanism comprises one counterclockwise 90° rotating L-shaped track 22 and an open-ended pull rod 23 (as shown in FIG. 7 ). The L-shaped track 22 is located on the arch surface of the semi-cylindrical body I(1), and the left section of the L-shaped track 22 overlaps the left side of the semi-cylindrical body I(1), and the L-shaped track 22 The right section of the cross-section overlaps the right side of the semi-cylindrical body I (1), and in the direction perpendicular to the rectangular plane I, the left end of the L-shaped track 22 is lower than the right end of the L-shaped track 22, counterclockwise The horizontal side of the L-shaped rotated 90° is parallel to the long side of the rectangular face I, and the long side and the long side are kept at a constant distance (the constant distance is 5mm), and the longitudinal side of the L-shaped rotated 90° counterclockwise is is inclined One end of the open-end pull rod 23 is located in the L-shaped track 22, and the other end is fixed on the right side of the semi-cylindrical body II (2).

A circular spinneret 39 is installed in the DIO spinning assembly, and a concave groove 41 is installed on the radial direction of the circular surface on which the spinning micropore 40 (exit hole) of the circular spinneret 39 is located (FIG. 12) As shown in), the radiation micropores 40 on both sides of the concave groove 41 are symmetrically distributed with respect to the concave groove 41, and the radiation micropores 40 on both sides are all arranged in an isosceles triangle. The number of radiation micropores 40 on each side is six, and the number of radiation micropores 40 distributed on an isosceles triangle is the same.

As shown in Fig. 9, the ring blowing cooling device includes a ring blowing box and a ring blowing filter core corresponding one-to-one with a spinneret 39 therein. The ring blowing box is divided into a first area 28 and a second area 29 by a separator perpendicular to the tow travel direction, and the first area 28 and the second area 29 are each independently formed into two pieces. Connect the cooling air inlet pipe. The area corresponding to the first area 28 in the ring blowing filter core 24 is the weak cooling area I 26 , and the area corresponding to the second area 29 in the ring blowing filter core 24 is the cooling area II (27). A single hollow rectangular plate 25 parallel to the tow running direction is installed in the center of the ring blowing filter core 24, and several holes are installed on the side of the hollow rectangular plate 25 facing the tow, all of which are ring blowing filter core Used to attenuate the mutual interference of cooling air between the two tows. One side corresponding to the thickness direction of the hollow rectangular plate 25 is provided in the concave groove 41 on the circular spinneret 39 (a hollow rectangular plate in the filter core is welded to the filter core, and the hollow rectangular plate during production is It is inserted into the middle recess of the spinneret and does not need to be fixed). The height ratio of the first region 28 and the second region 29 is 1:2.5 to 3.0, and the ratio of the thickness of the hollow rectangular plate 25 to the widest width of the concave groove is 1:1.3 to 1.5.

The focused oiling device is a spiral full contact micropore oiling device. The spiral full contact micropore oiling device includes an oil pipe 30 , a quick insert 31 , a metal connecting rod 32 , and a spiral ceramic member structure 36 connected sequentially, and is formed within the metal connecting rod 32 . A first hollow channel 33 is installed, a second hollow channel 34 is installed in the spiral ceramic member structure 36 , and the second hollow channel 34 communicates with the first hollow channel 33 and , the spiral portion of the spiral ceramic member structure 36 forms a yarn passage channel, and one side close to the yarn passage channel of the spiral portion forms an inclined surface, and several layers of annular oil collecting grooves 38 and oil discharge holes are formed on the inclined surface. 37 is installed, the oil discharge hole 37 is located above the oil collection groove 38, the oil collection groove 38 is all distributed to surround the yarn passing channel, and the oil discharge hole 37 is the first 2 communicates with the hollow channel 34, and the oil collecting groove 38 has a wave-patterned annular structure. The length of the metal connecting rod 32 is 3 to 4 cm, the diameter of the first hollow channel 33 is 3 to 5 mm, the diameter of the second hollow channel 34 is 3 to 5 mm, and the oil discharge hole 37 has a pore diameter of 0.3 to 0.5 mm, and the annular oil collecting groove of multiple layers is an annular oil collecting groove of 10 to 15 layers, the wave-patterned breaking and breaking drop values are 0.003 to 0.05 mm, and the pore diameter of the yarn passing channel is 1 to 2 mm.

Example 1

The production equipment of high uniformity ultrafine polyester fiber includes spinning box, DIO spinning assembly, ring blowing cooling device, focusing oiling device, spinning barrel, spare interlacer, drafting hot roller, shaping hot roller, main interlacer and winder. and a yarn stabilization device is installed between the drafting hot roller and the shaping hot roller.

1 to 3, the yarn stabilization device includes an upper housing, a lower housing, a disc (3), an L-shaped quick insert (5), a stainless steel pipe (4), a waste discharge pipe (14), a sliding mechanism and a position limiter. includes mechanisms.

The upper housing is a semicylindrical body I(1) with the rectangular side I facing down, the lower housing is a semicylindrical body II(2) with the rectangular side II facing up, and the rectangular side I of the semicylindrical body I(1) is The rectangular faces II of the semi-cylindrical body II(2) have the same width and a length of 1:1.6. The rectangular face I of the semi-cylindrical body I(1) and the rectangular face II of the semi-cylindrical body II(2) are installed opposite to each other and are both parallel to the horizontal plane, and the left side of the semi-cylindrical body II(2) is a disk (3) by a bolt. is fixed on a circular plane of , which plane faces to the left of the semi-cylindrical body I(1).

One through hole is installed on the original surface of the disk 3 , and the L-shaped quick insert 5 passes through the through hole and communicates with the stainless steel pipe 4 .

A position restriction block 10 is fixedly installed on the right side of the semi-cylindrical body II(2), a position restriction pin 11 is fixed on the position restriction block 10, and a rectangular surface on the right side of the semi-cylindrical body I(1) The edge of I forms a concave groove B (20), and the position limiting pin (11) is matched with the concave groove B (20).

The internal structure of the semi-cylindrical body I(1) is as follows. The stainless steel pipe 4 is provided to pass therethrough, and a cylindrical through hole 17 moving along the horizontal direction, a rectangular groove 19 and an annular groove 18 communicating with the cylindrical through hole are installed, and the rectangular groove 19 is Located below the cylindrical through hole, the bottom of the rectangular groove 19 is located on the rectangular surface I, the 24 through hole 21 is provided on the bottom of the rectangular groove 19 (ie, the rectangular surface I), the annular groove (18) is located at one end close to the disk (3) of the cylindrical through hole (17), and is used to seal the stainless steel pipe (4) by mounting an O-shaped ring.

The ratio of the length of the stainless steel pipe 4 to the length of the rectangular surface I is 1:1.12. A plug is installed at one end far from the disk 3 of the cylindrical through hole 17 , and one end of the plug and the stainless steel pipe 4 faces each other, and is used to seal the stainless steel pipe 4 .

In the rectangular face II of the semi-cylindrical body II(2), a point at a certain distance (a certain distance 15mm) from the edge of the rectangular face II forms a concave groove A so as to be concave inward, and the base 6 is formed in the concave groove A. install The upper surface of the base 6 forms 24 smooth arcuate concave grooves 7 (as shown in Fig. 8) uniformly distributed, and the central axis of the smooth arcuate concave groove 7 is the short side of the rectangular surface II. Parallel to and penetrating the upper surface of the base 6, the opening width of the smooth arcuate concave groove 7 is 1 mm. At the edge points of the two long sides of the rectangular face II, 24 yarn guide hooks a(8) and 24 yarn guide hooks b(9) are installed to face each other, and the yarns sequentially pass through the yarn passage channel of the yarn guide hook a(8). , the yarn path forming through the center of the smooth arcuate recess (7) and the yarn passing channel of the yarn guide hook b (9) is a straight line. On the base 6, both sides of the smooth arcuate concave groove perpendicular to the groove opening direction and the opposite inner wall of the concave groove A form a channel H while maintaining a constant distance. The 24 yarn guide hooks a(8) and 24 yarn guide hooks b(9) and the edge points of the two long sides of the rectangular face II are fixed with the yarn guide hook frame, and the yarn guide hook frame and the rectangular face II are bolted Fix it. 4 and 5, the yarn guide hook a(8) is a snail-shaped yarn guide hook, and the yarn guide hook b(9) is a double arcuate yarn guide device. The snail-shaped yarn guide hook is a left-hand snail-shaped yarn guide hook and a right-hand snail-shaped yarn guide hook, the quantity is 12 each, the left-hand snail-shaped yarn guide hook and the right-hand snail-shaped yarn guide hook are installed crosswise.

The sliding mechanism consists of a guide rail G(12) installed on the two long sides of the rectangular face II, respectively (the guide rail length is 60% of the long side of the rectangular face II), and a guide rail installed on the left end of the two long sides of the rectangular face I, respectively. C (guide rail length is 30% of the long side of the rectangular side I) and a U-shaped pull rod 13 (as shown in Fig. 6), and the two long sides of the U-shaped pull rod 13 are half Inserted into the guide rail G (12), the other half is inserted into the guide rail C, the left end of the U-shaped pull rod (13) is provided with a blocking block extending outward, the semi-cylindrical body I (1) Implements sliding to the right.

When the position limiting pin 11 and the concave groove B 20 on the right side of the semi-cylindrical body I (1) match, the 24 through holes 21 and 24 smooth arcuate concave grooves on the bottom plate in the rectangular groove 19 (7) corresponds one-to-one and is located in the upper chamber of each smooth arcuate concave groove (7).

The waste discharge device includes a waste discharge pipe 14 and a channel H, and the waste discharge pipe 14 is installed in the lower housing and communicates with the channel H.

An arcuate fixing block 15 is fixed at the center point of the arcuate surface of the semi-cylindrical body II, a position fixing hole is installed on the arcuate fixing block 15, and a hexagonal screw 16 is adopted to penetrate the position fixing hole to the lower part Fix the housing onto the bottom support of the orthopedic hot roller.

The positioning mechanism comprises one counterclockwise 90° rotating L-shaped track 22 and an open-ended pull rod 23 (as shown in FIG. 7 ). The L-shaped track 22 is located on the arch surface of the semi-cylindrical body I(1), and the left section of the L-shaped track 22 overlaps the left side of the semi-cylindrical body I(1), and the L-shaped track 22 The right section of the cross-section overlaps the right side of the semi-cylindrical body I (1), and in the direction perpendicular to the rectangular plane I, the left end of the L-shaped track 22 is lower than the right end of the L-shaped track 22, counterclockwise The horizontal side of the L-shaped rotated 90° is parallel to the long side of the rectangular face I, and the long side and the long side are kept at a constant distance (the constant distance is 5mm), and the longitudinal side of the L-shaped rotated 90° counterclockwise is is inclined One end of the open-end pull rod 23 is located in the L-shaped track 22, and the other end is fixed on the right side of the semi-cylindrical body II (2).

A circular spinneret 39 is installed in the DIO spinning assembly, and a concave groove 41 is installed on the radial direction of the circular surface on which the spinning micropore 40 (exit hole) of the circular spinneret 39 is located (FIG. 12) As shown in), the radiation micropores 40 on both sides of the concave groove 41 are symmetrically distributed with respect to the concave groove 41, and the radiation micropores 40 on both sides are all arranged in an isosceles triangle. The number of radiation micropores 40 on each side is six, and the number of radiation micropores 40 distributed on an isosceles triangle is the same.

As shown in Fig. 9, the ring blowing cooling device includes a ring blowing box and a ring blowing filter core corresponding one-to-one with a spinneret 39 therein. The ring blowing box is divided into a first area 28 and a second area 29 by a separator perpendicular to the tow travel direction, and the first area 28 and the second area 29 are each independently formed into two pieces. Connect the cooling air inlet pipe. The area corresponding to the first area 28 in the ring blowing filter core 24 is the weak cooling area I 26 , and the area corresponding to the second area 29 in the ring blowing filter core 24 is the cooling area II (27). A single hollow rectangular plate 25 parallel to the tow running direction is installed in the center of the ring blowing filter core 24, and several holes are installed on the side of the hollow rectangular plate 25 facing the tow, all of which are ring blowing filter core Used to attenuate the mutual interference of cooling air between the two tows. One side corresponding to the thickness direction of the hollow rectangular plate 25 is provided in the concave groove 41 on the circular spinneret 39 . The height ratio of the first region 28 and the second region 29 is 1:2.5, and the ratio of the thickness of the hollow rectangular plate 25 to the widest width of the concave groove is 1:1.3.

As shown in Fig. 10, the focused oiling device is a spiral full contact micropore oiling device. The spiral full contact micropore oiling device includes an oil pipe 30, a quick insert 31, a metal connecting rod 32 and a spiral ceramic member structure 36 connected sequentially (as shown in FIG. 11). ). A first hollow channel 33 is installed in the metal connecting rod 32 , a second hollow channel 34 is installed in the spiral ceramic member structure 36 , and the second hollow channel 34 is a first hollow channel 34 . In communication with the channel 33, the spiral portion of the spiral ceramic member structure 36 forms a yarn passage channel, one side close to the yarn passage channel of the spiral portion forms an inclined surface, and an annular oil collecting groove of several layers on the inclined surface 38 and the oil discharge hole 37 are installed, the oil discharge hole 37 is located above the oil collection groove 38, and the oil collection groove 38 is all distributed to surround the yarn passing channel, and the oil The discharge hole 37 communicates with the second hollow channel 34 , and the oil collecting groove 38 has a wave pattern annular structure. The length of the metal connecting rod 32 is 3 cm, the diameter of the first hollow channel 33 is 4 mm, the diameter of the second hollow channel 34 is 4 mm, the hole diameter of the oil discharge hole 37 is 0.4 mm, and , the multi-layered annular oil collecting groove is a 12-layer annular oil collecting groove, the wave-patterned breakage and ripple drop values are 0.02mm, and the pore diameter of the yarn passing channel is 1.5mm.

Example 2

The method for producing a highly uniform ultrafine polyester fiber by adopting the production equipment in Example 1 is, using the polyester melt as a spinning raw material, sequentially a spinning box, a DIO spinning assembly, a ring blowing cooling device, a focused oiling device. , a spinneret, a preliminary interlacer, a drafting hot roller, a yarn stabilization device, a shaping hot roller, a main interlacer and a winder to produce a highly uniform ultrafine polyester fiber.

Here, the spinning process parameters are that the air pressure in the weak cooling zone I is 5 Pa and the air pressure in the cooling zone II is 15 Pa. The drafting hot roller speed is 1200m/min, the drafting hot roller temperature is 82℃, the shaping hot roller speed is 3900m/min, the shaping hot roller temperature is 110℃, the winding speed is 3800m/min, the yarn stabilization The pressure in the device is 0.2 bar.

The indices of the manufactured high uniformity ultra-fine polyester fibers are as follows. Linear density is 5.5 dtex, linear density non-uniformity is 0.2%, burst strength is 4.2 cN/dtex, burst strength non-uniformity is 1.9%, elongation at break is 29.8%, and elongation at break non-uniformity is 3.5%. The yarn non-uniformity rate is 0.68%, the specific shrinkage rate is 9%, and the oiling rate is 1.18%.

Example 3

The method for producing a highly uniform ultrafine polyester fiber by adopting the production equipment in Example 1 is, using the polyester melt as a spinning raw material, sequentially a spinning box, a DIO spinning assembly, a ring blowing cooling device, a focused oiling device. , a spinneret, a preliminary interlacer, a drafting hot roller, a yarn stabilization device, a shaping hot roller, a main interlacer and a winder to produce a highly uniform ultrafine polyester fiber.

Here, the spinning process parameters are that the air pressure in the weak cooling zone I is 6 Pa and the air pressure in the cooling zone II is 16 Pa. The drafting hot roller speed is 1260 m/min, the drafting hot roller temperature is 84°C, the shaping hot roller speed is 3945 m/min, the shaping hot roller temperature is 112°C, the winding speed is 3850 m/min, the yarn stabilization The pressure in the device is 0.2 bar.

The indices of the manufactured high uniformity ultra-fine polyester fibers are as follows. Linear density is 6dtex, linear density non-uniformity is 0.05%, rupture strength is 4.35cN/dtex, rupture strength non-uniformity is 1.85%, elongation at break is 30%, elongation at break non-uniformity is 4.1%. The yarn non-uniformity rate is 0.72%, the specific shrinkage rate is 9.1%, and the oiling rate is 1.18%.

Example 4

The method for producing a highly uniform ultrafine polyester fiber by adopting the production equipment in Example 1 is, using the polyester melt as a spinning raw material, sequentially a spinning box, a DIO spinning assembly, a ring blowing cooling device, a focused oiling device. , a spinneret, a preliminary interlacer, a drafting hot roller, a yarn stabilization device, a shaping hot roller, a main interlacer and a winder to produce a highly uniform ultrafine polyester fiber.

Here, the spinning process parameters are that the air pressure in the weak cooling zone I is 7 Pa and the air pressure in the cooling zone II is 17 Pa. The drafting hot roller speed is 1300m/min, the drafting hot roller temperature is 86℃, the shaping hot roller speed is 4050m/min, the shaping hot roller temperature is 115℃, the winding speed is 3950m/min, the yarn stabilization The pressure in the device is 0.28 bar.

The indices of the manufactured high uniformity ultrafine polyester fibers are as follows. Linear density is 6.6dtex, linear density non-uniformity is 0.1%, rupture strength is 4.46cN/dtex, rupture strength non-uniformity is 1.98%, elongation at break is 30.6%, elongation at break non-uniformity is 4.3%. The yarn non-uniformity rate is 0.81%, the specific shrinkage rate is 9.1%, and the oiling rate is 1.16%.

Example 5

The method for producing a highly uniform ultrafine polyester fiber by adopting the production equipment in Example 1 is, using the polyester melt as a spinning raw material, sequentially a spinning box, a DIO spinning assembly, a ring blowing cooling device, a focused oiling device. , a spinneret, a preliminary interlacer, a drafting hot roller, a yarn stabilization device, a shaping hot roller, a main interlacer and a winder to produce a highly uniform ultrafine polyester fiber.

Here, the spinning process parameters are that the air pressure in the weak cooling zone I is 8 Pa and the air pressure in the cooling zone II is 20 Pa. The drafting hot roller speed is 1450 m/min, the drafting hot roller temperature is 87°C, the shaping hot roller speed is 4150 m/min, the shaping hot roller temperature is 117°C, the winding speed is 4050 m/min, the yarn stabilization The pressure in the device is 0.38 bar.

The indices of the manufactured high uniformity ultra-fine polyester fibers are as follows. Linear density is 7.3dtex, linear density non-uniformity is 0.28%, rupture strength is 4.72cN/dtex, rupture strength non-uniformity rate is 1.7%, elongation at break is 31.1%, and elongation at break non-uniformity is 3.95%. The yarn non-uniformity rate is 0.75%, the specific shrinkage rate is 9.2%, and the oiling rate is 1.16%.

Example 6

The method for producing a highly uniform ultrafine polyester fiber by adopting the production equipment in Example 1 is, using the polyester melt as a spinning raw material, sequentially a spinning box, a DIO spinning assembly, a ring blowing cooling device, a focused oiling device. , a spinneret, a preliminary interlacer, a drafting hot roller, a yarn stabilization device, a shaping hot roller, a main interlacer and a winder to produce a highly uniform ultrafine polyester fiber.

Here, the spinning process parameters are that the air pressure in the weak cooling zone I is 10 Pa and the air pressure in the cooling zone II is 18 Pa. The drafting hot roller speed is 1500m/min, the drafting hot roller temperature is 88℃, the shaping hot roller speed is 4200m/min, the shaping hot roller temperature is 118℃, the winding speed is 4100m/min, the yarn stabilization The pressure in the device is 0.4 bar.

The indices of the manufactured high uniformity ultrafine polyester fibers are as follows. The linear density is 7.6 dtex, the linear density non-uniformity is 0.3%, the burst strength is 4.68 cN/dtex, the burst strength non-uniformity is 1.75%, the elongation at break is 32.5%, and the elongation at break is 4.65%. The yarn non-uniformity rate is 0.81%, the specific shrinkage rate is 8.6%, and the oiling rate is 1.2%.

Example 7

The method for producing a highly uniform ultrafine polyester fiber by adopting the production equipment in Example 1 is, using the polyester melt as a spinning raw material, sequentially a spinning box, a DIO spinning assembly, a ring blowing cooling device, a focused oiling device. , a spinneret, a preliminary interlacer, a drafting hot roller, a yarn stabilization device, a shaping hot roller, a main interlacer and a winder to produce a highly uniform ultrafine polyester fiber.

Here, the spinning process parameters are that the air pressure in the weak cooling zone I is 5 Pa and the air pressure in the cooling zone II is 20 Pa. The drafting hot roller speed is 1400m/min, the drafting hot roller temperature is 85℃, the shaping hot roller speed is 4100m/min, the shaping hot roller temperature is 116℃, the winding speed is 4000m/min, the yarn stabilization The pressure in the device is 0.35 bar.

The indices of the manufactured high uniformity ultra-fine polyester fibers are as follows. Linear density is 7dtex, linear density non-uniformity is 0.21%, rupture strength is 4.55cN/dtex, rupture strength non-uniformity is 1.59%, elongation at break is 33.1%, elongation at break is 4.02%. The yarn non-uniformity rate was 0.66%, the specific shrinkage rate was 8.5%, and the oiling rate was 1.1%.

1: Semi-cylindrical body I
2: Semi-cylindrical body II
3: Disc
4: stainless steel pipe
5: L-shaped quick insert
6: Smooth arched recessed base
7: Smooth arched recess
8: Yarn guide hook a
9: Yarn guide hook b
10: Position restriction block
11: Position limit pin
12: guide rail G
13: U-shaped pull rod
14: waste pipe
15: arched fixed block
16: internal hexagon screw
17: through hole
18: annular groove
19: rectangular groove
20: concave groove B
21: through hole
22: L-shaped guide rail
23: Open-end pool load
24: ring blowing filter core
25: rectangular multi-hole plate
26: weak cooling zone I
27: Cooling Zone II
28: first area
29: second area
30: oil pipe
31: quick insert
32: metal connecting rod
33: first hollow channel
34: second hollow channel
35: yarn passing channel
36: spiral ceramic member structure
37: oil drain hole
38: oil collecting groove
39: Spinneret
40: spinning micropores
41: concave groove
42: Yan
43: yarn separation ceramic sheet

Claims (14)

In the production equipment of high uniformity ultra-fine polyester fiber,
Containing spinning box, DIO spinning assembly, ring blowing cooling device, focused oiling device, spinning barrel, spare interlacer, drafting hot roller, shaping hot roller, main interlacer and winder, between the drafting hot roller and shaping hot roller installed with a yarn stabilization device;
The yarn stabilization device comprises an upper housing, a lower housing, a disc (3), an L-shaped quick insert (5), a stainless steel tube (4), a waste discharge tube (14) and a sliding mechanism, the upper housing having a rectangular side I facing down. The facing semicylindrical body I(1), the lower housing is the semicylindrical body II(2) with the rectangular side II facing up, the rectangular side I of the semicylindrical body I(1) and the rectangle of the semicylindrical body II(2) The width of the face II is the same, and the rectangular face I of the semi-cylindrical body I(1) and the rectangular face II of the semi-cylindrical body II(2) are installed opposite and are both parallel to the horizontal plane, and the left side of the semi-cylindrical body II(2) is fixed on the circular surface of the disk 3 by bolts, the original surface facing the left side of the semi-cylindrical body I (1);
One through hole is installed on the original surface of the disk 3, and the L-shaped quick insert 5 passes through the through hole and communicates with the stainless steel pipe 4;
A position restriction block 10 is fixedly installed on the right side of the semi-cylindrical body II(2), a position restriction pin 11 is fixed on the position restriction block 10, and a rectangular surface on the right side of the semi-cylindrical body I(1) The edge of I forms a concave groove B (20), the position limiting pin 11 is matched with the concave groove B (20), and a stainless steel pipe 4 is provided inside the semi-cylindrical body I (1) to pass through, A cylindrical through hole 17 moving in the horizontal direction, a rectangular groove 19 and an annular groove 18 communicating with the cylindrical through hole are installed, and the rectangular groove is located below the cylindrical through hole, and the bottom of the rectangular groove is It is located on the rectangular surface I, and n through holes 21 are installed on the bottom of the rectangular groove, the annular groove 18 is located at one end close to the disk of the cylindrical through hole 17, and the O-ring is mounted on the stainless steel used to seal the steel pipe (4);
The ratio of the length of the stainless steel pipe 4 to the length of the rectangular surface I is 1:1 to 1.12, and a plug is installed at one end of the cylindrical through hole 17 far from the disk 3;
In the rectangular face II of the semi-cylindrical body II(2), a point at a certain distance from the edge of the rectangular face II forms a concave groove A so as to be concave inward, and a base 6 is installed in the concave groove A, and the base ( The upper surface of 6) forms n smooth arcuate concave grooves 7 uniformly distributed, and the central axis of the smooth arcuate concave groove is parallel to the short side of the rectangular surface II and penetrates the upper surface of the base 6, At the edge points of the two long sides of the rectangular face II, n yarn guide hooks a (8) and n yarn guide hooks b (9) are installed oppositely, and the yarns sequentially enter the yarn passage channel of the yarn guide hook a, smooth arcuate The yarn path formed through the center of the concave groove and the yarn passage channel of the yarn guide hook b is straight, and the opposite side surfaces perpendicular to the groove opening direction of the smooth arcuate concave groove on the base 6 and the opposite inner wall of the concave groove A maintain a constant distance and form a channel H;
The n yarn guide hook a and the n yarn guide hook b and the edge points of the two long sides of the rectangular side II are fixed by adopting the yarn guide hook frame, and the yarn guide hook frame and the rectangular side II are fixed by using the bolts, ;
The sliding mechanism includes a guide rail G (12) respectively installed on the two long sides of the rectangular face II, a guide rail C and a U-shaped pull rod 13 respectively installed on the left ends of the two long sides of the rectangular face I, U Half of the two long sides of the type pull rod 13 are inserted into the guide rail G (12), the other half is inserted into the guide rail C, and the left end of the U-shaped pull rod 13 has a blocking extending outward. A block is installed to implement the sliding toward the right of the semi-cylindrical body I(1);
When the position limiting pin 11 and the concave groove B on the right side of the semi-cylindrical body I(1) match, n through holes 21 and n smooth arcuate concave grooves 7 on the bottom plate in the rectangular groove 19 are one-to-one correspondence, each located in the upper chamber of a smooth arcuate concave groove;
the waste discharge device is composed of a waste discharge pipe 14 and a channel H, the waste discharge pipe 14 is installed in the lower housing and communicates with the channel H;
An arcuate fixing block 15 is fixed at the center point of the arcuate surface of the semi-cylindrical body II, a position fixing hole is installed on the arcuate fixing block 15, and a hexagonal screw 16 is adopted to penetrate the position fixing hole to the lower part High-uniformity ultra-fine polyester fiber production equipment, characterized in that the housing is fixed on the bottom support of the shaping hot roller. According to claim 1,
the yarn stabilization device further comprises a positioning mechanism;
The positioning mechanism comprises an L-shaped track (22) and an open-ended pull rod (23) rotating 90° in a counterclockwise direction;
The L-shaped track 22 is located on the arch surface of the semi-cylindrical body I(1), and the left section of the L-shaped track 22 overlaps the left side of the semi-cylindrical body I(1), and the L-shaped track 22 The right section of the cross-section overlaps the right side of the semi-cylindrical body I (1), and in the direction perpendicular to the rectangular plane I, the left end of the L-shaped track 22 is lower than the right end of the L-shaped track 22, counterclockwise The horizontal side of the L-shape rotated by 90° is parallel to the long side of the rectangular surface I, and the longitudinal side of the L-shaped rotated 90° counterclockwise is inclined while maintaining a constant distance from the long side;
One end of the open-end pull rod 23 is located in the L-shaped track 22, and the other end is fixed on the right side of the semi-cylindrical body II (2). According to claim 1,
The yarn guide hook a is a snail-shaped yarn guide hook 9, the yarn guide hook b is a double arcuate yarn guide device 8, the opening width of the smooth arcuate recess is 1 to 2 mm, and the semi-cylindrical body I (1) The ratio of the length of the rectangular surface I to the rectangular surface II of the semi-cylindrical body II (2) is 1:1.6, and the value of n is 1 to 48. 4. The method of claim 3,
The snail-shaped yarn guide hook 9 is a left-hand snail-shaped yarn guide hook and a right-hand snail-shaped yarn guide hook, the quantity is n/2 respectively, and the left-hand snail-shaped yarn guide hook and the right-hand snail-shaped yarn guide hook are cross-installed. A production facility for ultra-fine polyester fibers with high uniformity. According to claim 1,
A circular spinneret 39 is installed in the DIO spinning assembly, and a concave groove 41 is installed on the radial direction of the circular surface on which the spinning micropore 40 of the circular spinneret 39 is located, and the concave groove 41 both sides. of the spun fine pores 40 are symmetrically distributed with respect to the concave groove 41, and the spun fine pores 40 on both sides are all arranged in an isosceles triangle. 6. The method of claim 5,
The number of spun micropores 40 on each side is six, and the production facility for highly uniform ultrafine polyester fibers, characterized in that the number of spun micropores 40 located on an isosceles triangle is the same. According to claim 1,
The ring blowing cooling device includes a ring blowing box and a ring blowing filter core corresponding one-to-one with a spinneret 39 therein;
The ring blowing box is divided into a first area 28 and a second area 29 by a separator perpendicular to the tow travel direction, and the first area 28 and the second area 29 are each independently formed into two pieces. connecting the cooling air inlet pipe;
The area corresponding to the first area 28 in the ring blowing filter core 24 is the weak cooling area I 26 , and the area corresponding to the second area 29 in the ring blowing filter core 24 is the cooling area II (27); A single hollow rectangular plate 25 parallel to the tow running direction is installed in the center of the ring blowing filter core 24, and several holes are installed on the side of the hollow rectangular plate 25 facing the tow, all of which are ring blowing filter core used to attenuate the mutual interference of cooling air between the two tows in it;
One side corresponding to the thickness direction of the hollow rectangular plate (25) is provided in the concave groove (41) on the circular spinneret (39), High uniformity ultra-fine polyester fiber production equipment. 8. The method of claim 7,
The height ratio of the first region 28 and the second region 29 is 1:2.5 to 3.0, and the ratio of the thickness of the hollow rectangular plate 25 to the widest width of the concave groove is 1:1.3 to 1.5 A production facility for ultra-fine polyester fibers with high uniformity. According to claim 1,
The focused oiling device is a spiral full contact micropore oiling device;
The spiral full contact micropore oiling device includes an oil pipe 30, a quick insert 31, a metal connecting rod 32 and a spiral ceramic member structure 36 connected in sequence; A first hollow channel 33 is installed in the metal connecting rod 32 , a second hollow channel 34 is installed in the spiral ceramic member structure 36 , and the second hollow channel 34 is a first hollow channel 34 . in communication with the channel 33; The spiral portion of the spiral ceramic member structure 36 is a yarn passage channel, and one side close to the yarn passage channel of the spiral portion forms an inclined surface, and several layers of annular oil collecting grooves 38 and oil discharge holes 37 are formed on the inclined surface. is installed, the oil discharge hole is located above the oil collection groove 38, and the oil collection groove 38 is all distributed so as to surround the yarn passing channel; The oil discharge hole 37 communicates with the second hollow channel 34 ; The oil collecting groove 38 is a production facility for ultra-fine polyester fiber with high uniformity, characterized in that it has a wave pattern annular structure. 10. The method of claim 9,
The length of the metal connecting rod 32 is 3 to 4 cm, the diameter of the first hollow channel 33 is 3 to 5 mm, the diameter of the second hollow channel 34 is 3 to 5 mm, and the oil discharge hole 37 has a pore diameter of 0.3 to 0.5 mm, and the annular oil collecting groove of multiple layers is an annular oil collecting groove of 10 to 15 layers, the wave-patterned breaking and breaking drop values are 0.003 to 0.05 mm, and the pore diameter of the yarn passing channel is 1 A production facility for ultra-fine polyester fibers with high uniformity, characterized in that it is 2 mm. [Claim 11] In the method for producing a high uniformity ultra-fine polyester fiber by adopting the production facility of the high-uniformity ultra-fine polyester fiber according to any one of claims 1 to 10,
Using polyester melt as spinning raw material, sequentially spinning box, DIO spinning assembly, ring blowing cooling device, focused oiling device, spinning barrel, preliminary interlacer, drafting hot roller, yarn stabilizing device, shaping hot roller, main inter Through a racer and a winder, a highly uniform ultrafine polyester fiber is produced;
A method for producing a highly uniform ultrafine polyester fiber, characterized in that the pressure in the yarn stabilization device is 0.2 to 0.4 bar. 12. The method of claim 11,
The spinning process parameter is a method for producing a highly uniform ultrafine polyester fiber, characterized in that the air pressure in the weak cooling zone I is 5 to 10 Pa, and the air pressure in the cooling zone II is 15 to 20 Pa. 13. The method of claim 12,
The spinning process parameters are that the drafting hot roller speed is 1200 to 1500 m/min, and the drafting hot roller temperature is 82 to 88°C; The shaping hot roller speed is 3900-4200 m/min; The shaping hot roller temperature is 110-118°C; Winding speed is 3800 to 4100 m / min Method for producing a highly uniform ultra-fine polyester fiber, characterized in that it further comprises. 12. The method of claim 11,
The index of the high uniformity ultrafine polyester fiber is that the linear density is 5.5 to 7.6 dtex, the linear density non-uniformity is ≤ 0.6%, the burst strength is ≥ 4.1 cN/dtex, the burst strength non-uniformity is ≤ 2%, and the elongation at break is High uniformity, characterized in that the elongation at break non-uniformity is ≤5.0%, the yarn non-uniformity is ≤0.82%, the specific shrinkage is 7.7 to 9.3%, and the oiling ratio is 1.0 to 1.18%. A method of making ultrafine polyester fibers.

Images