CN108642585B - FDY filament spinning and drawing combination machine - Google Patents

Abstract

The invention discloses an FDY (fully drawn yarn) long-filament spinning and drawing combination machine, which comprises an extrusion device, a melt pipeline system, a metering pump, a spinning device, a cooling device, a channel part, an oiling device, a filament guiding and drawing device and a winding device which are sequentially arranged according to a production process, wherein the cooling device comprises a slow cooler part, a monomer suction part and a side-blowing cooling part, and the slow cooler part is communicated between the spinning device and the side-blowing cooling part and is positioned at a filament outlet end of the spinning device; the slow cooling device part comprises a delayed cooling air chamber and a slow cooling heater, and the slow cooling heater heats the delayed cooling air chamber; the single suction part is communicated with the wire inlet end of the side blowing cooling part; the wire outlet end of the cross air blow cooling part is communicated with the channel part. Through setting up monomer suction device, use high-pressure water injection suction monomer, overcome among the current device monomer crystallization adhesion on spinneret and side blow exhaust vent, cause the spinning condition to worsen, the defect that the broken end increases shortens production cycle, improves spinning quality.

Description

FDY filament spinning and drawing combination machine

Technical Field

The application belongs to the technical field of spinning mechanical equipment, and particularly relates to an FDY (fully drawn yarn) filament spinning and drawing combination machine.

Background

FDY (FULLY DRAWN YARN), which introduces drawing during spinning, can produce a wound yarn with high orientation and moderate crystallinity, and is also called FULLY drawn yarn. Conventional fully drawn yarns of terylene (polyester fiber) and chinlon (also called nylon and polyamide) belong to chemical fiber filaments. The FDY fabric has smooth and soft hand feeling, is often used for weaving the silk-like fabric, and has wide application in the aspects of clothing and home textiles.

The wear resistance of the nylon fabric is the first of various fabrics, is many times higher than that of other fiber fabrics of similar products, and therefore, the nylon fabric has excellent durability, not only is the best choice of down jackets and mountaineering wear materials, but also is often blended or interwoven with other fibers to improve the strength and the fastness of the fabric. The existing FDY filament spinning and drawing combination machine has the problem of more broken ends when producing FDY filaments of polyamide materials (polyamide 6, polyamide 66, polyamide 1010, polyamide 1212 and the like), and the product quality is influenced.

Disclosure of Invention

In order to solve the technical problems, the invention provides an FDY filament spinning and drawing combination machine which can obviously improve the problem of end breakage of polyamide fibers in the spinning process when used for producing polyamide FDY filaments.

The technical scheme adopted for realizing the purpose of the invention is that the FDY long-filament spinning and drawing combination machine comprises an extrusion device, a melt pipeline system, a metering pump, a spinning device, a cooling device, a channel part, an oiling device, a guide-wire drawing device and a winding device which are sequentially arranged according to a production process;

the cooling device comprises a slow cooler part, a single body suction part and a side-blowing cooling part, wherein:

the slow cooling device part is communicated between the spinning device and the cross air blow cooling part and is positioned at a filament outlet end of the spinning device; the slow cooling device part comprises a delayed cooling air chamber and a slow cooling heater, and the slow cooling heater heats the delayed cooling air chamber;

the single suction part is communicated with the wire inlet end of the side blowing cooling part and is opposite to the wire outlet end of the slow cooler part;

and the wire outlet end of the cross air blow cooling part is communicated with the shaft part.

Preferably, the extrusion device comprises an extruder and a measuring head, the measuring head being mounted at the outlet of the extruder; the measuring head is provided with a temperature sensor and a pressure sensor; the inner cavity of the measuring head is provided with a pre-filtering device.

Preferably, the spinning device comprises a spinning box and a spinning assembly, and the spinning assembly is arranged in the spinning box;

and a melt channel communicated with the spinning assembly is arranged in the spinning box, the melt channel is communicated with the melt pipeline system, and a melt pressure measuring point is arranged on the melt channel.

Preferably, a melt cooling valve is arranged on the melt channel;

and a refrigerant channel is arranged in the spinning box and is communicated with the melt cooling valve.

Preferably, the pipe wall of the melt pipeline system is of a jacket structure;

a heating medium channel is arranged in the spinning box, and heating media flow through the heating medium channel and the jacket gaps of the jacket structure;

and a heat medium temperature measuring point is arranged on the heat medium channel.

Preferably, a heat preservation cover is arranged outside the spinning box, and the melt pipeline system, the spinning box and the slow cooler component are all wrapped in the heat preservation cover.

Preferably, the monomer suction part comprises a suction pipe, a spraying device and a spraying adsorption area;

the suction pipe is arranged at the wire inlet end of the side air blowing cooling part, the suction inlet of the suction pipe is opposite to the wire outlet end of the slow cooler part, and the suction outlet is communicated with the jet adsorption area;

the spraying device is arranged in the spraying adsorption area, and the installation height of the spraying device is higher than that of the suction outlet; the injection device comprises a high-pressure water pipe, a valve body and a valve core, wherein the high-pressure water pipe is communicated with the valve body, and the valve core is rotatably arranged in the valve body.

Preferably, the suction inlet of the suction pipe is a cavity with gradually reduced width, and a spray heating device is arranged in the cavity;

the spray heating device comprises a spray pipe, hot steam circulates in the spray pipe, and more than 1 spray opening is formed in the spray pipe.

Preferably, the side-blowing cooling part comprises an air duct and a cooling air chamber which are communicated with each other, the cooling air chamber is positioned at the filament outlet end of the slow cooler part, the air duct outputs cooling air vertical to the filament bundles, and the cooling air enters the cooling air chamber;

the air duct is sequentially provided with an air volume regulating valve, a filter and an air rectifying device from the air inlet to the air outlet;

the air rectifying device is arranged in the side blowing cooling component along the direction parallel to the tows, and comprises a pore plate, a honeycomb plate and more than 1 layer of metal mesh which are sequentially arranged;

the aperture of the hole plate is reduced from the wire inlet end to the wire outlet end of the side air-blowing cooling component in a sectional mode.

Preferably, a pre-networking device is arranged between the oiling device and the guide wire drafting device;

the guide wire drafting device comprises a steering guide wire part, a traction roller, a first pair of drafting rollers, a second pair of drafting rollers and a guide roller which are arranged in sequence;

the first pair of drawing rollers adopt fixed hot rollers matched with angle-adjustable hot rollers;

the second pair of drawing rollers adopt angle-adjustable hot rollers matched with angle-adjustable hot rollers.

Compared with the prior art, the FDY filament spinning and drawing combination machine provided by the invention comprises an extrusion device, a melt pipeline system, a metering pump, a spinning device, a cooling device, a channel part, an oiling device, a filament guiding and drawing device and a winding device; the extrusion device, the melt pipeline system, the metering pump and the spinning device are communicated in sequence, and raw material slices are melted into melt and are subjected to spinning; the cooling device is communicated with the channel part in sequence and outputs cooled and solidified fibers; after being oiled and wetted by the oiling device, the fiber is drawn and turned by the guide wire drawing device and is finally wound by the winding device to obtain the FDY filament.

In the above production step, the breakage mainly occurs in the cooling solidification step. It has been found that all polyamide materials, i.e. nylon materials, produce monomers, which are properties specific to polyamide chemical molecular materials. The polyamide raw material chips contain a certain amount of monomers and oligomers which escape from the spinning orifices of the spinning device in gaseous form with the melt through the high temperature environment during the above-mentioned melting and spinning steps. Subsequently, in the cooling and solidifying step, under the cooling action of the cross air blow and the ambient temperature, crystals are adhered to the spinneret plate of the spinning device and the air outlet holes of the cross air blow cooling part, so that the spinning condition is deteriorated, and the broken ends are increased.

Therefore, the invention improves the problem of spinning broken ends by improving the structure of the cooling device. The slow cooling device part and the monomer suction part are arranged before the side-blowing cooling part which is arranged conventionally, the slow cooling device part is communicated between the spinning device and the side-blowing cooling part and is positioned at the filament outlet end of the spinning device, the slow cooling device part plays a role in delaying cooling and still has a heating effect on primary filaments, monomers and oligomers cannot be crystallized in the slow cooling device part, and the problem of monomer crystallization on a spinneret plate of the spinning device is solved by arranging the slow cooling device part. This monomer suction part communicates in the end of advancing of cross-air blast cooling part, because monomer and oligomer just can crystallize under the cooling action, consequently monomer suction part can be taken out gaseous monomer and oligomer before entering cross-air blast cooling part, solves the monomer crystallization problem on the exhaust vent of cross-air blast cooling part.

Through the structural improvement, the FDY filament spinning and drawing combination machine provided by the invention solves the problem of monomer crystallization on a spinneret plate of a spinning device by arranging a slow cooling device part at the filament outlet end of the spinning device; the monomer suction component is arranged at the wire inlet end of the side blowing cooling component, and gaseous monomers and oligomers are pumped out before entering the side blowing cooling component, so that the problem of monomer crystallization on an air outlet of the side blowing cooling component is solved. Therefore, the phenomenon of no broken ends in the whole spinning process is realized, the quality of the FDY filaments is improved, and the production period of the FDY filaments is shortened.

Drawings

FIG. 1 is a front view of an FDY filament spinning and drawing combination machine provided in accordance with the present invention;

FIG. 2 is a side view of an FDY filament spinning and drawing combination machine provided in accordance with the present invention;

description of reference numerals: 1-an extruder; 2-a measuring head; 3-a melt piping system; 4-spinning box; 5-a metering pump; 6-spinning assembly; 7-a slow cooler component; 8-a monomer aspiration component; 9-side-blowing cooling means; 10-a chimney member; 11-oiling device; 12-a pre-network device; 13-a steering guide wire member; 14-a pulling roller; 15-a first pair of draw rolls; 16-a second pair of draw rolls; 17-a guide roll; 18-a winding device;

FIG. 3 is a schematic view of the external structure of the spinning apparatus;

FIG. 4 is a schematic view of the internal structure of the spinning apparatus;

description of reference numerals: 4-a spinning box, 4 a-a melt channel, 4 b-a heat preservation cover, 4 c-a melt pressure measuring point, 4 d-a heat medium channel, 4 e-a flange and 4 f-a heat medium temperature measuring point; 5-a metering pump; 6-spinning assembly; 7-a slow cooler component;

FIG. 5 is a block diagram of a metering pump;

description of reference numerals: 5-a metering pump, 5 a-a motor, 5 b-a speed reducer, 5 c-a flange plate, 5 d-a transmission shaft, 5 e-a coupling, 5 f-a universal coupling, 5 g-a safety pin and 5 h-a pump shaft joint;

FIG. 6 is a front view of the quencher section;

FIG. 7 is a top view of the quencher section;

description of reference numerals: 7-a slow cooler part, 7 a-a connecting plate, 7 b-an upper heat insulation plate, 7 c-a heating plate, 7 d-a lower heat insulation plate, 7 e-a base, 7 f-a delayed cooling air chamber, 7 g-a heating channel, 7 h-a heating pipe and 7 i-a circular hole;

FIG. 8 is a front view of the monomer suction features;

FIG. 9 is a top view of a monomer suction feature;

description of reference numerals: 8-monomer suction component, 8 a-suction pipe, 8 b-injection device, 8 c-injection adsorption area, 8 d-cavity, 8 e-spray pipe, 8 f-high pressure water pipe, 8 g-valve body and 8 h-valve core;

FIG. 10 is a schematic structural view of a side-blow cooling unit;

description of reference numerals: 9-side air blowing cooling part, 9 a-air channel, 9 b-cooling air chamber, 9 c-air volume adjusting valve, 9 d-filter, 9 e-air rectifying device, 9 f-guide plate and 9 g-air conditioning system.

Detailed Description

In order to make the present application more clearly understood by those skilled in the art to which the present application pertains, the following detailed description of the present application is made with reference to the accompanying drawings by way of specific embodiments.

Referring to fig. 1 and 2, an FDY filament spinning and drawing combination machine comprises an extrusion device, a melt pipeline system 3, a metering pump 5, a spinning device, a cooling device, a channel component 10, an oiling device 11, a guide wire drawing device and a winding device 18 which are sequentially arranged according to a production process. The cooling device comprises a slow cooler part 7, a single body suction part 8 and a side blowing cooling part 9, wherein the slow cooler part 7 is communicated between the spinning device and the side blowing cooling part 9 and is positioned at the filament outlet end of the spinning device; the slow cooling device part 7 comprises a delayed cooling air chamber 7f and a slow cooling heater, and the slow cooling heater heats the delayed cooling air chamber 7 f; the single suction part 8 is communicated with the wire inlet end of the side blowing cooling part 9; the wire outlet end of the cross air blow cooling part 9 is communicated with the shaft part 10.

In this example, the FDY filament spin-draw combination was used to spin polyamide 56FDY filaments. Polyamides on the market today are almost exclusively produced by petrochemical processes. However, with the increasing exhaustion of energy and the rising of petroleum price, more and more people are looking at the field of biochemistry. The biological method is used for replacing a petroleum method, and the polyamide industry is changed into a sustainable development industry. Polyamide 56 (nylon 56) is a new nylon material, in which 1, 5-pentanediamine for synthesizing polyamide 56 can be converted from lysine by means of bioengineering, and the nylon produced by the new method is more competitive in performance, influence on environment, cost and the like than the nylon produced by traditional petroleum raw materials. Therefore, the industrial production of polyamide 56 is of great significance to the development of green chemistry and new material. The polyamide 56 fiber has the advantages of the traditional nylon fiber such as nylon 6 and nylon 66 fiber, and has high strength, good wear resistance and good spinnability. The melting point of the polyamide 56 fiber is about 250 ℃, the glass transition temperature is about 55 ℃, the tensile strength and the heat resistance are high, and the polyamide 56 fiber has the flexibility similar to that of nylon 6 fiber, and also has high moisture absorption and desorption properties and contact cold feeling. The strength of the fiber is 1-2 times higher than that of cotton, 4-5 times higher than that of wool, and 3 times higher than that of viscose fiber. Can be used for comfortable socks in spring and summer and soft and warm underwear in autumn and winter.

Although polyamide 56 has such many advantages, it has a disadvantageous property that it is easy to form a gel during spinning, and thus spinning using conventional melt spinning equipment has a problem that the quality and properties of the spun product are not stable, and it is difficult to perform industrial production. The FDY filament spinning and drawing combined machine provided by the application can be used for spinning polyamide 56FDY filaments. According to the production process sequence, the specific structure of each component part of the FDY filament spinning and drawing combination machine is as follows:

referring to fig. 1 and 2, the extrusion apparatus includes an extruder 1 and a measuring head 2, and the extruder 1 specifically employs a screw extruder (specification:

) The screw extruder was a horizontal type, L/D was 30, and a large length-diameter ratio screw extruder having an increased extrusion amount of 20% was used for spinning the polyamide 56.

The screw extruder 1 consists of an alternating current motor, a speed reducer, a screw, a sleeve and a heating temperature control system dragging speed regulation control system. The slices enter the extruder 1 from the feed port of the screw, and the solid slices are melted and extruded into a melt under the heating of each area of the screw and the rotary extrusion of the screw, and a certain pressure is established at the head for downstream injection of a metering pump 5. The melt obtained by melt extrusion enters the measuring head 2 in sequence through 6 heating zones of a screw extruder at the temperature of 240-280 ℃.

Referring to fig. 1 and 2, a measuring head 2 is installed at the outlet of the extruder 1, and a temperature sensor and a pressure sensor are arranged on the measuring head 2, so that the online pressure and temperature parameters of the polyamide 56 melt can be measured. The inner cavity of the measuring head 2 is provided with a pre-filtering device, and the pre-filtering device specifically adopts a pre-filtering ring to pre-filter large-particle materials. The pressure of the measuring head 2 is set to be 10Mpa, the temperature is set to be 265-275 ℃, and the melt enters the melt pipeline system 3 in sequence.

Referring to fig. 1 and 2, a melt piping 3 is connected between the measuring head 2 and the spinning device, and is connected with the measuring head 2 and the spinning device through a flange structure. The melt pipeline system 3 is used for conveying the molten melt to the spinning device, the inner wall of the pipeline is required to be smooth, the connecting position has no dead angle, the stored material is prevented from being degraded, the stagnation point and the dead point are eliminated, and the residence time, the temperature, the shear rate and the pressure distribution of the melt to each spinning position are ensured to be uniform and consistent.

The melt pipeline system 3 is provided with a static mixer which can fully homogenize and mix the melt and convey the melt to the inlet of the metering pump 5 of each spinning part with equal residence time and pressure drop, so that the melt quality of each part is consistent with the pressure of the inlet of the metering pump 5, and the metering precision and high-quality fineness are ensured. The pipe wall of the melt pipeline system 3 is of a jacket structure, a heating medium flows through a jacket gap of the jacket structure, and the melt pipeline system 3 is heated and insulated by the heating medium. The temperature of the melt pipeline system 3 is set to be 260-270 ℃, and the melts sequentially enter the spinning device.

Referring to fig. 1 and 2, the spinning device comprises a spinning manifold 4 and a spinning assembly 6, wherein the spinning assembly 6 is arranged in the spinning manifold 4, the spinning manifold 4 is 2 bits/manifold in the embodiment, and the bit distance is 1750 mm. Spinning case 4 is the rectangle subassembly is proclaimed oneself to upper assembling type high pressure, and the modular of combination can be dismantled, and spinning case 4 has cancelled the fuse-element coupling of conventional setting, and the modular combination of fuse-element pipeline is dismantled in whole adoption, all is connected through flange 4e between the pipeline and between pipeline and the passageway promptly, has both improved the rheology, reduces dwell time, improves the heat effect, can regularly dismantle again and calcine, eliminates inside jam.

The spinning box 4 is designed into a double-layer structure, a heat medium channel 4d is arranged in the spinning box, a heat medium flows through the heat medium channel, the spinning box 4 is heated and insulated by the heat medium, the temperature control precision is +/-1 ℃, and a heat medium temperature measuring point 4e is arranged on the heat medium channel, so that the temperature can be controlled accurately. The spinning box 4 is externally provided with a heat preservation cover 4b which takes heat insulation materials as fillers, and three parts with heating functions, namely the melt pipeline system 3, the spinning box 4 and the slow cooler part 7, are all wrapped in the heat preservation cover 4 b.

Referring to fig. 4, a melt channel 4a communicated with a spinning assembly 5 is arranged in the spinning box 4, the melt flowing in from the melt pipeline system 3 is divided into two paths in the spinning box 4, the melt is ensured to be conveyed to each spinning position in equal residence time through the symmetrically arranged melt channels 4a, the inner wall of the melt channel 4a is required to be polished smoothly, no dead angle is formed at the joint, and the stored material is prevented from being degraded. Each melt channel 4a is provided with a melt pressure measuring point 4c for measuring the melt pressure flowing into the spinning position and judging whether the melt pressure of each spinning position changes in the spinning process. In addition, each melt channel 4a is provided with a melt cooling valve, a refrigerant channel is arranged in the spinning box 4 and is communicated with the melt cooling valve, and the purpose of preventing the melt in the channel from flowing so as to replace the metering pump 5 is achieved by using refrigerant (generally adopting compressed air) for cooling. The temperature of the melt channel 4a is set to 268-275 ℃, and the melts enter the metering pump 5 in sequence.

Referring to fig. 1 and 2, the metering pump 5 is installed on the spinning beam 4, the specification is 6 x (2.4-3.2) cc/rev, the power of the motor 5a is 1.0kw, and the number is determined according to the number of spinning heads.

Referring to fig. 5, the metering pump adopts a vertical overhead installation mode and sequentially comprises a motor 5a, a speed reducer 5b, a flange plate 5c, a transmission shaft 5d, a coupler 5e, a universal coupling 5f, a safety pin 5g and a pump shaft joint 5h from top to bottom. Because the metering pump requires high-precision metering accuracy, the transmission shaft 5d is driven by a permanent magnet synchronous motor 5a direct-connection cycloidal pin gear speed reducer 5b and is subjected to variable-frequency speed regulation, each pump is independently driven, the transmission shaft 5d can stretch and retract, and the transmission shaft 5d is provided with a universal coupling and a safety pin 5g protection device. The metering pump serves to continuously and accurately feed the melt to the spinning pack 6 for spinning by means of high pressure. The melt enters the spinning pack 6 in sequence.

Referring to fig. 1 and 2, the spin pack 6 is installed in the manifold 4, the spin pack 6 is configured as a cup-shaped structure, and the spin pack 6 is sized as

The spinneret plate has 24-72 holes, and the molten polyamide 56 uniformly enters the spinneret plate through a vertical feed inlet, so that the uniformity of the primary yarn bundle sprayed by the spinneret plate is ensured, and the spinnability and the uniformity of the primary yarn bundle are improved. The primary raw silk enters the slow cooling device part 7 in sequence.

Referring to fig. 1 and 2, the slow cooling device part 7 is communicated between the spinning device and the side-blowing cooling part 9 and is positioned at a filament outlet end of the spinning device, specifically below a spinneret plate, the slow cooling device part 7 comprises a delayed cooling air chamber 7f and a slow cooling heater, short fibers of polyamide 56 fibers are spun, the structure of nascent fibers requires uniform inside and outside, meanwhile, in order to prevent sudden cooling of the melt of the polyamide 56, so that macromolecular bonds are intertwined, the strength of finished filaments is affected, a delayed cooling zone is arranged below the spinneret plate, the delayed cooling air chamber 7f is heated by the slow cooling heater, and the slow cooling heater is designed to play a role in delayed cooling, so that the melt of the polyamide 56 is temporarily kept in hot air at 230-260 ℃ for a period of time so as not to be rapidly cooled.

Referring to fig. 6, the slow cooler part 7 has a structure in which a connecting plate 7a, an upper heat insulating plate 7b, a heating plate 7c, a lower heat insulating plate 7d, and a base 7e are sequentially disposed from top to bottom, and centers of the connecting plate 7a, the upper heat insulating plate 7b, the heating plate 7c, the lower heat insulating plate 7d, and the base 7e are hollowed out to form a delayed cooling plenum 7f having a right trapezoid vertical cross section. A heating channel 7g is arranged in the heating plate around the delayed cooling air chamber 7f, the heating channel 7g is externally connected with a heating pipe 7h, and a heating medium continuously flows in the heating channel 7g to form a slow cooling heater.

Referring to fig. 7, the horizontal section of the delayed cooling air chamber 7f is a plurality of circular holes 7i which are connected in series and communicated, the number of the circular holes is the same as the total number of the spinning pack 6, in this embodiment, 3 spinnerets are arranged at each spinning position, and the number of the yarn outlets of the whole spinning pack 6 is 6. The slowly cooled primary filament sequentially passes through the monomer suction part 8 and enters the side air blowing cooling part 9.

Referring to fig. 1 and 2, a monomer suction part 8 is also provided below the spinneret, which communicates with the feed end of the side-blow cooling part 9 to draw out the gaseous monomers and oligomers before they enter the side-blow cooling part 9.

Referring to fig. 8, the monomer suction means 8 includes a suction pipe 8a, a spray device 8b, and a spray adsorption zone 8 c. The suction pipe 8a is arranged at the wire inlet end of the side-blowing cooling part 9, the suction inlet of the suction pipe is opposite to the wire outlet end of the slow cooler part 7, and the suction outlet is communicated with the jet adsorption area 8 c.

Referring to fig. 9, the suction inlet of the suction pipe 8a is a cavity 8d with a decreasing width, the maximum width (opening) is connected and communicated with the side blow cooling part 9, and the width of the maximum width (opening) is equal to the width of the side blow cooling part 9, and the wire feeding end of the side blow cooling part 9 is completely covered along the width direction. Be equipped with monomer heating device in the cavity 8d, can adopt electric heater unit or spray heating device, in order to guarantee that the monomer can not cool off crystallization and block up the suction opening, monomer heating device adopts spray heating device in this embodiment, spray heating device includes spray tube 8e, wherein the circulation has hot steam, evenly set up 1 above nozzle on the spray tube 8e, blowout in the hot steam self-spray nozzle of flow, with gaseous monomer and oligomer intensive mixing, with the abundant and even heating of gaseous monomer and oligomer, prevent gaseous monomer and oligomer crystallization.

Referring to fig. 8, the spraying device 8b is installed in the spray adsorption zone 8c at a height higher than the suction outlet. The injection device 8b comprises a high-pressure water pipe 8f, a valve body 8g and a valve core 8h, the high-pressure water pipe 8f is communicated with the valve body 8g, the valve core 8h is rotatably installed in the valve body 8g, a spiral downward water channel is arranged in the valve core 8h, water injected into the high-pressure water pipe 8f washes the valve core 8h, flows through the spiral water channel of the valve core 8h, so that the valve core 8h automatically rotates, the rotating valve core 8h generates a rotating moment on water, so that the water is rotationally injected into an injection adsorption area 8c, the process is similar to a windmill rotation principle, the rotationally injected water forms a vortex in the injection adsorption area 8c, pressure difference is generated, and gaseous monomers and oligomers in the suction pipe 8a are sucked into the injection adsorption area 8c and are adsorbed and taken out by the water. The monomer and oligomer in the suction pipe 8a in a gaseous state can also be sucked into the spray adsorption zone 8c by installing a suction fan on the suction pipe 8a to form a negative pressure. The tows sequentially enter a side air blowing cooling part 9 after being sucked by a monomer suction part 8 to form gaseous monomers.

Referring to fig. 1 and 2, the side-blowing cooling component 9 is installed at the lower part of the spinning box 4, in this embodiment, the side-blowing cooling component 9 adopts side-blowing with a blowing area of 1420mm wide and 1600mm long, the air volume is large, the pressure of the main air duct 9a is 800Pa, the air temperature is usually controlled to (21 ℃ -23 ℃) plus or minus 1 ℃, the wind speed irregularity is less than or equal to plus or minus 9%, the relative humidity is 85 plus or minus 5%, and the wind speed is 0.5 m/s-0.9 m/s.

Referring to fig. 10, the inside of the side-blowing cooling part 9 includes an air duct 9a and a cooling air chamber 9b which are communicated with each other, the cooling air chamber 9b is located at the filament outlet end of the slow cooler part 7, an air conditioning system 9g supplies stable and clean cooling air to the air duct 9a, the air duct 9a outputs cooling air perpendicular to the filament bundles, and the cooling air enters the cooling air chamber 9 b. An air volume adjusting valve 9c, a filter 9d and an air rectifying device 9e are sequentially arranged on the air duct 9a from the air inlet to the air outlet, the filter 9d is installed in a drawer type mode and can be directly drawn out when cleaning or replacing is needed, the filter 9d is installed perpendicular to the tows (along the horizontal direction), and cooling air penetrates through the filter 9d from bottom to top.

One side wall of the air duct 9a is a guide plate 9f which is obliquely arranged, the guide plate 9f is positioned above the filter 9d, an included angle between the guide plate 9f and the filter 9d is an acute angle, and the wind direction of the filtered cooling wind is changed after meeting the guide plate 9f and then blows to the wind rectifying device 9 e.

The filaments are transformed from the melt stream into plastic monofilaments in a short time after they exit the spinneret, the structure of which changes greatly as a result of the speed and uniformity of the air flow in the upper part of the cross-blow. The wind rectifying device 9e is installed in the side-blowing cooling part 9 in a direction parallel to the filament bundles (vertical direction), and is also installed in a drawer type manner, so that the wind rectifying device can be directly drawn out when being cleaned or replaced. The wind rectifying device 9e comprises a pore plate, a honeycomb plate and more than 1 layer of metal meshes which are sequentially arranged, the aperture of the pore plate is reduced from the wire inlet end to the wire outlet end of the side blowing cooling component 9 in a segmented manner, in the embodiment, the aperture is reduced by 3 segments from top to bottom, namely, the aperture of the upper segment is larger than the aperture of the middle segment and larger than the aperture of the lower segment, so that good wind speed is obtained, namely, the wind speed is stable and consistent in the transverse direction of the cooling wind chamber 9b, the direction is correct, the speed distribution is reasonable in the height direction of the cooling wind chamber 9b, and the uniform solidification and forming of tows. The solidified and formed tows enter the shaft member 10 in sequence.

Referring to fig. 1 and 2, a duct member 10 is installed below the side-blow cooling member 9 to communicate with the cooling plenum 9 b. The polyamide 56 fiber passes through the channel part 10, so that the interference of the external environment temperature and the wind direction can be avoided, and the swinging of the polyamide 56 filament bundle is reduced. The tows sequentially enter an oiling device 11.

Referring to fig. 1 and fig. 2, the oiling device 11 applies oil by using double oil tankers, cools the solidified biomass polyamide 56 fiber tows, and performs oiling and wetting by using the double oil tankers facing each other, so that the cohesive force of the fibers is increased, the antistatic performance of the fibers is improved, the running-in force between the fibers and equipment and between the fibers is reduced, and the post-processing performance of the filament fibers is improved. The oiled tows sequentially enter a pre-interlacer 12.

Referring to fig. 1 and 2, the pre-interlacer 12 has the functions of homogenizing the oiling agent for the fiber during spinning, saving 20% of the oiling agent, uniformly distributing the spinning oiling agent, improving the stability and speed of the drafting process, reducing friction, reducing broken filaments and broken ends, further stabilizing the tension of the filaments on the spinning process, enabling only interlacing but not network points among the filaments, and enhancing the cohesion among the filaments. The tows sequentially enter a guide wire drafting device.

Referring to fig. 1 and 2, the guide yarn drafting device includes a turning guide yarn member 13, a draft roller 14, a first pair of draft rollers 15, a second pair of draft rollers 16, and a guide roller 17, which are sequentially arranged.

The filament bundle enters a turning filament guiding part 13, the existing sharp turning of the filament route is changed into 0-45-90 degrees, and then the filament bundle enters a traction roller 14.

The filament bundle is wound on the traction roller 14 for 1 to 2 circles at the speed of 1100m/min without heating, and the filament bundle is wound on the traction roller 14 and then is conveyed to the first pair of drafting rollers 15.

First pair of draft rollers 15

The method is characterized in that a fixed hot roller and an angle-adjustable hot roller are adopted, the surface of a shell of the hot roller is mirror chromium, 5.5-6.5 circles of tows are wound on the surface of a first pair of drafting rollers 15, the heating temperature of the first pair of drafting rollers 15 is 95 ℃, the spinning speed is 1150m/min, and the tows are wound on the first pair of drafting rollers 15 and then are conveyed to a second pair of drafting rollers 16.

A second pair of drawing rolls 16

The angle-adjustable hot roller and the angle-adjustable hot roller are adopted, the surface of the shell of the hot roller is made of ceramic, the tows are wound on the surface of the second pair of drafting rollers 16 for 6.5-7.5 circles, the heating temperature of the second pair of drafting rollers 16 is 130 ℃, the spinning speed is 2450m/min, and the tows are wound on the second pair of drafting rollers 16 and then are conveyed to the guide roller 17.

The guide roller 17 adopts a fixed guide roller 17

The surface of the shell is ceramic, the filament bundle is wound on the guide roller 17 for 0.5 to 1.5 circles without heating at the speed of 2460m/min, and the filament bundle is wound on the guide roller 17 and then is conveyed to the winding device 18.

The winding device 18 adopts a BWA55 series full-automatic winding head to complete winding at the spinning speed of 2400m/min, and 50D-200D polyamide 56FDY filaments with excellent performance (high strength and good uniformity of finished filaments) are obtained.

Through the embodiment, the invention has the following beneficial effects or advantages:

1) according to the FDY filament spinning and drawing combination machine provided by the invention, the monomer suction device is arranged, and the high-pressure water is sprayed and sucked to the monomer, so that the defects that in the existing device, monomer crystals are adhered to a spinneret plate and a side blowing air outlet, the spinning condition is deteriorated, and the broken ends are increased are overcome, the production period is shortened, and the spinning quality is improved.

2) According to the FDY filament spinning and drawing combination machine provided by the invention, the spray heating device is arranged at the suction port of the monomer suction device, flowing hot steam can be fully mixed with gaseous monomers and oligomers, and the gaseous monomers and oligomers are fully and uniformly heated, so that the monomers are prevented from being cooled, crystallized and blocked at the suction port, and the suction effect of the monomers is ensured.

3) The FDY filament spinning and drawing combination machine provided by the invention adopts a screw extruder with a large length-diameter ratio, the extrusion capacity of which is increased by 20%, and the length-diameter ratio of a screw of the screw extruder is different from that of a conventional screw;

the melt pipeline system and the spinning device are detachably mounted, can be detached when melt cementing blockage occurs in a pipeline or a channel, and can clean cementing materials by calcining or other means;

the air rectifying device of the side-blowing cooling component comprises a pore plate, a honeycomb plate and a plurality of layers of metal nets which are sequentially arranged, the pore diameter of the pore plate is gradually reduced from the wire inlet end to the wire outlet end of the side-blowing cooling component, and is different from the pore diameter and the arrangement form of the existing air rectifying device, so that good air speed can be obtained, namely, the air flow is stable and consistent in the transverse direction of the cooling air chamber, the direction is correct, the speed distribution is reasonable in the height direction of the cooling air chamber, and the uniform and consistent solidification forming of tows is ensured;

due to the improvements, the FDY filament spinning and drawing combination machine can overcome the unfavorable characteristic that the polyamide 56 is easy to bond, and can produce the polyamide 56FDY filament which is more environment-friendly and has better flame retardance.

While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (8)

1. The FDY long yarn spinning and drawing combination machine comprises an extrusion device, a melt pipeline system, a metering pump, a spinning device, a cooling device, a channel component, an oiling device, a yarn guide drawing device and a winding device which are sequentially arranged according to a production process, and is characterized in that:

the cooling device comprises a slow cooler part, a single body suction part and a side-blowing cooling part, wherein:

the slow cooling device part is communicated between the spinning device and the cross air blow cooling part and is positioned at a filament outlet end of the spinning device; the slow cooling device part comprises a delayed cooling air chamber and a slow cooling heater, and the slow cooling heater heats the delayed cooling air chamber;

the monomer suction part is communicated with the filament inlet end of the cross air blow cooling part and is opposite to the filament outlet end of the slow cooler part, and the monomer suction part is used for sucking gaseous monomers and oligomers before the gaseous monomers and oligomers enter the cross air blow cooling part;

the monomer suction part comprises a suction pipe, a spraying device and a spraying adsorption area;

the suction pipe is arranged at the wire inlet end of the side air blowing cooling part, the suction inlet of the suction pipe is opposite to the wire outlet end of the slow cooler part, and the suction outlet is communicated with the jet adsorption area; the suction inlet of the suction pipe is a cavity with the width decreasing progressively, the position with the maximum width, namely the opening, is connected with the side blowing cooling part and communicated with the side blowing cooling part, the width of the suction inlet is equal to that of the opening, and the suction pipe covers the wire inlet end of the side blowing cooling part along the width direction; a spray heating device is arranged in the cavity; the spray heating device comprises a spray pipe, wherein hot steam flows through the spray pipe, and more than 1 spray opening is formed in the spray pipe;

the spraying device is arranged in the spraying adsorption area, and the installation height of the spraying device is higher than that of the suction outlet; the injection device comprises a high-pressure water pipe, a valve body and a valve core, wherein the high-pressure water pipe is communicated with the valve body, and the valve core is rotatably arranged in the valve body; a spiral downward water channel is arranged in the valve core, when water sprayed from the high-pressure water pipe flushes the valve core, the valve core automatically rotates under the action of water flow passing through the spiral water channel, so that the water flow sprayed by the rotation of the valve core forms vortex in the spray adsorption area and generates pressure difference for sucking gaseous monomers and oligomers;

and the wire outlet end of the cross air blow cooling part is communicated with the shaft part.

2. The FDY filament spinning combination of claim 1, wherein: the extrusion device comprises an extruder and a measuring head, and the measuring head is arranged at an outlet of the extruder; the measuring head is provided with a temperature sensor and a pressure sensor; the inner cavity of the measuring head is provided with a pre-filtering device.

3. The FDY filament spinning combination of claim 1, wherein: the spinning device comprises a spinning box and a spinning assembly, and the spinning assembly is arranged in the spinning box;

and a melt channel communicated with the spinning assembly is arranged in the spinning box, the melt channel is communicated with the melt pipeline system, and a melt pressure measuring point is arranged on the melt channel.

4. The FDY filament spinning combination of claim 3, wherein: a melt cooling valve is arranged on the melt channel;

and a refrigerant channel is arranged in the spinning box and is communicated with the melt cooling valve.

5. The FDY filament spinning combination of claim 3, wherein: the pipe wall of the melt pipeline system is of a jacket structure;

a heating medium channel is arranged in the spinning box, and heating media flow through the heating medium channel and the jacket gaps of the jacket structure;

and a heat medium temperature measuring point is arranged on the heat medium channel.

6. The FDY filament spinning combination of claim 3, wherein: the spinning box is provided with a heat preservation cover outside, and the melt pipeline system, the spinning box and the slow cooler component are all wrapped in the heat preservation cover.

7. The FDY filament spinning combination of claim 1, wherein: the side blowing cooling part comprises an air duct and a cooling air chamber which are communicated with each other, the cooling air chamber is positioned at the filament outlet end of the slow cooler part, the air duct outputs cooling air vertical to the filament bundles, and the cooling air enters the cooling air chamber;

the air duct is sequentially provided with an air volume regulating valve, a filter and an air rectifying device from the air inlet to the air outlet;

the air rectifying device is arranged in the side blowing cooling component along the direction parallel to the tows, and comprises a pore plate, a honeycomb plate and more than 1 layer of metal mesh which are sequentially arranged;

the aperture of the hole plate is reduced from the wire inlet end to the wire outlet end of the side air-blowing cooling component in a sectional mode.

8. The FDY filament spinning combination of claim 1, wherein: a pre-networking device is arranged between the oiling device and the guide wire drafting device;

the guide wire drafting device comprises a steering guide wire part, a traction roller, a first pair of drafting rollers, a second pair of drafting rollers and a guide roller which are arranged in sequence;

the first pair of drawing rollers adopt fixed hot rollers matched with angle-adjustable hot rollers;

the second pair of drawing rollers adopt angle-adjustable hot rollers matched with angle-adjustable hot rollers.

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