CN115354403A

CN115354403A - Production method of wear-resistant low-shrinkage polyester drawn yarn

Info

Publication number: CN115354403A
Application number: CN202210183145.4A
Authority: CN
Inventors: 王春燕; 邱中南; 陆海梅; 王腾滕; 沈洁; 张银鸿
Original assignee: Tongkun Group Zhejiang Hengtong Chemical Fiber Co Ltd
Current assignee: Tongkun Group Zhejiang Hengtong Chemical Fiber Co Ltd
Priority date: 2022-02-25
Filing date: 2022-02-25
Publication date: 2022-11-18
Anticipated expiration: 2042-02-25
Also published as: CN115354403B

Abstract

The application discloses a production method of wear-resistant low-shrinkage polyester drawn yarns, which is characterized by comprising the following steps of: the method comprises polyester drawn yarns, wherein the polymerization of the polyester drawn yarns adopts a four-kettle process, namely two-stage esterification, one-stage pre-polycondensation and one-stage final polycondensation. Preparing Purified Terephthalic Acid (PTA) and ethylene glycol (MEG) according to a process proportion, carrying out chemical reaction under the conditions of certain temperature, pressure and the like, carrying out esterification, pre-polycondensation and final polymerization in sequence through a catalyst to obtain a PET melt, and conveying the PET melt to a spinning workshop through a high-temperature melt conveying pump. And then the melt is conveyed to a spinning box body by a melt booster pump and a melt metering pump for spinning, extruding, cooling, drafting and winding forming.

Description

Production method of wear-resistant low-shrinkage polyester drawn yarn

Technical Field

The invention relates to the technical field of polyester drawn yarns, in particular to a production method of a wear-resistant low-shrinkage polyester drawn yarn.

Background

Since 1928, synthetic fibers are successfully developed by DuPont, and have excellent properties such as strength, dimensional stability and mildew and moth resistance which are incomparable with most natural fibers, so that the synthetic fibers are very popular with people. After years of rapid development, synthetic fibers have become important textile materials, wherein polyester fibers are the main variety of the synthetic fibers, and terylene accounts for 82% of the specific gravity of the synthetic fibers in 2020. Meanwhile, the polyester filament yarn has high strength, good elasticity, good wear resistance and low water absorption, so that the polyester filament yarn is widely applied to the field of industrial shoes and clothes.

With the development of society, the living standard of people is continuously improved, and the attention and the requirements of people on industrial shoes and clothes are gradually improved. On the premise of meeting the functional requirements, the decorative fabric also needs to play a good decorative role and meet the requirements of individuation and comfort of consumers, for example, industrial shoes and clothes need to have excellent performances of comfort, ventilation, wear resistance, softness and the like. The following problems mainly exist in the field of industrial shoes and clothes made of polyester filaments at present: firstly, when the industrial shoes and clothes are worn and used for a long time, the problems of short wearing period and large waste of the industrial shoes and clothes can occur due to insufficient wearing fastness and poor wear resistance; secondly, in order to protect the industrial shoes and clothes, the materials are usually selected to be relatively stiff and thick, so that people feel stuffy, breathable and poor in moisture permeability when wearing the shoes and clothes, the peculiar smell is large, and the comfort of consumers is seriously influenced.

Therefore, it is a technical problem to be solved urgently to improve the abrasion resistance and wearing comfort of the polyester fiber and reduce the shrinkage rate of the polyester fiber.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a production method of wear-resistant and low-shrinkage yarn.

In order to achieve the purpose, the invention provides the following technical scheme:

a production method of wear-resistant low-shrinkage polyester drawn yarns comprises the steps of polyester drawn yarns, wherein a four-kettle process technology is adopted for polyester drawn yarn polymerization, namely two-stage esterification, one-stage pre-polycondensation and one-stage final polycondensation, fine terephthalic acid (PTA) and ethylene glycol (MEG) are prepared according to a process proportion, chemical reaction is carried out, esterification, pre-polycondensation and final polycondensation are carried out successively through a catalyst to prepare a PET melt, and the PET melt is conveyed to a spinning workshop through a high-temperature melt conveying pump. The melt is conveyed to a spinning box body through a melt booster pump and a melt metering pump for spinning, extruding, cooling, drafting and winding forming, and a heating plate device is added in the drafting stage, namely the filament bundle is wound for 6.5 circles at the temperature of 90-98 ℃ of a GR1 hot roller and is wound for 5.5 circles at the temperature of 135-138 ℃ of a GR2 hot roller and then enters the heating plate device; the heating plate is a cuboid with the width of 20 cm and the length of 60 cm, a heating pipe is arranged in the heating plate, and heat insulation materials are arranged on the inner side of the heating plate; the elongation at break of the fiber can be improved by adopting a lower GR1 speed of 1200-1500m/min and a higher GR2 speed of 4600-5000m/min, namely the draft multiple of 3.25-4.17.

Further, the process flow is as follows: slurry preparation → first esterification → second esterification → polymerization precondensation → polymerization final polymerization kettle → booster pump → spinning pack extrusion → cooling molding → oiling → GR1 hot roller → GR2 hot roller → heating plate → guide wire hook → winding molding.

Further, the specific process parameters are as follows: the mol ratio of EG/PTA is 1.1-1.3, the PTA liquid level is 65-75%, the slurry preparation temperature is 65-75%, and on the basis of the slurry preparation temperature, a catalyst is added, and the flow rate of the catalyst is 800-900kg/h; the first esterification stirring speed is 28-32rpm, the reaction temperature is 268-270 ℃, the liquid level is 85-90 percent, and the pressure is 100-105kpa; the stirring speed of the second esterification is 32-35rpm, the reaction temperature is 274-275 ℃, the liquid level is 87-89%, and the pressure is 35-37kpa; the polymerization precondensation is divided into the control of different process parameters of an upper chamber and a lower chamber, wherein the process parameters of the upper chamber are as follows: the reaction temperature is 278-280 ℃, the liquid level is 38-39%, the pressure is 14-16kpa, and the stirring speed is 26-28rpm; the lower chamber process parameters are as follows: the reaction temperature is 282-284 ℃, the liquid level is 74-76%, the pressure is 2.8-2.9kpa, and the stirring speed is 4.8-5.0rpm; the reaction temperature of the polymerization final polymerization kettle is 287 to 288 ℃, the liquid level is 40 to 50 percent, the pressure is 210 to 230pa, and the stirring speed is 3.3 to 3.5rpm; the pressure before the booster pump is 4-6MPa, and the pressure after the booster pump is 15-20MPa.

Furthermore, the extrusion is carried out on a circular spinneret plate with 36 spinneret orifices, the spinneret plate is distributed in a diamond shape, each spinneret orifice comprises a guide hole and a transition hole fixedly connected with one end of each guide hole, and a capillary hole is arranged at the other end of each transition hole.

Furthermore, a metal non-woven fabric super-felt filter material is adopted at the bottom of the sand cup of the component, and 60g of 40-mesh metal sand, 50-mesh filter screen, 60g of 60-80-mesh metal sand, 50-mesh screen and 50g of 80-100-mesh metal sand are sequentially placed in the sand cup.

By adopting the scheme, the breaking strength and the breaking elongation are improved, the fibers with high breaking strength and high breaking elongation are not easy to rub and break, tangles can be formed on the surface of the fabric after long-time rubbing, and the fibers are not easy to fall off from the surface of the fabric; and after the fibers with low breaking strength and small breaking elongation are rubbed, the fibers are easy to break and fall off on the surface of the fabric, so that the shoe and the clothes become thin and even have holes.

The invention also discloses a heat preservation device for the wear-resistant low-shrinkage polyester drawn yarns, and aims to provide a production device with good melt filtering effect and good melt solution heat preservation effect.

The utility model provides a heat preservation device of wear-resisting low shrinkage rate dacron drawn yarn which characterized in that: the device comprises a heat insulation box, a spinning box arranged in the heat insulation box, a spinning assembly arranged in the spinning box, a heating and heat-preserving assembly arranged in the heat insulation box, a melt filtering box arranged at the top of the heat insulation box, a melt filtering assembly arranged in the filtering box, a reciprocating driving assembly arranged on the filtering box and matched with the melt filtering assembly for use, and a melt conveying assembly arranged at the top of the outer side wall of the filtering box; the heating and heat-insulating assembly comprises a heat-insulating box which is arranged in the heat-insulating box and wraps the spinning box body, an oil inlet pipe which is arranged at the top of the heat-insulating box in a penetrating way and is communicated with the heat-insulating box, an oil outlet pipe which is arranged on the outer side wall of the heat-insulating box in a penetrating way and is communicated with the heat-insulating box, and an electric heating wire which is arranged in the heat-insulating box; the spinning assembly comprises a distribution pipe which is arranged at the top of the heat insulation box in a penetrating mode and communicated with the filter box, a first branch pipe which is arranged in a bilateral symmetry mode and communicated with the distribution pipe, a metering pump arranged on the first branch pipe, a second branch pipe which is arranged at the bottom of the spinning box in a penetrating mode and extends out through the heat insulation box and the heat insulation box, a second branch pipe which is arranged at the opening at the top of the first branch pipe in a penetrating mode and communicated with the first branch pipe, and a spinneret plate fixedly arranged between the bottoms of the two branch pipes.

A heat preservation device for wear-resistant low-shrinkage polyester drawn yarns is characterized in that a filter assembly comprises a connecting rod movably arranged on the left side wall of a filter box in a penetrating mode, an inserted rod movably arranged on the right side wall of the filter box in a penetrating mode, a filter frame arranged between the connecting rod and the inserted rod, a jacking spring arranged between the filter frames and sleeved on the inserted rod, a piece of laminating cloth fixedly arranged between the outer end edge of the top of the filter frame and the inner side wall of the filter box, a plurality of filter holes I formed in the bottom of the filter frame, two L-shaped rods arranged on the bottom of the filter frame in a bilateral symmetry mode, a threaded rod arranged on the L-shaped rods in a penetrating mode in the horizontal direction and in threaded connection with the L-shaped rods, a filter plate arranged between the two threaded rods and in rotary connection with the threaded rod, a filter hole II formed in the filter plate and matched with the filter holes I, a sliding chute formed in the L-shaped rods, and a sliding rod arranged at the bottom of the filter plate and in sliding connection with the sliding chute; the reciprocating driving assembly comprises a placing plate arranged on the filter box, a motor arranged on the front side wall of the placing plate, a rotating shaft which penetrates through the placing plate and is fixedly connected with the output end of the motor in a coaxial rotation mode, a block lacking gear fixedly arranged on the rotating shaft, an opening frame arranged on the outer side of the filter box and fixedly connected with a connecting rod, and two racks arranged on the upper side and the lower side in the opening frame, wherein the block lacking gear is arranged between the two racks, a cross rod is horizontally arranged on the outer side wall of the filter box, and a vertical rod sleeved on the cross rod is fixedly arranged on the opening frame; the melt conveying assembly comprises a conveying cylinder arranged on the outer side wall of the filter box in a penetrating mode, a conveying motor arranged at the left end of the conveying cylinder, a conveying shaft arranged in the conveying cylinder and fixedly connected with the output end of the conveying motor in a coaxial rotating mode, a spiral blade arranged on the conveying shaft, and a conical hopper arranged at the top of the conveying cylinder in a penetrating mode.

Adopt foretell a scheme, cooperation through heating insulation subassembly and spinning subassembly, through injecting the oil body into the insulation can when using, then the cooperation of electric heating wire, thereby after the equipment outage, the heat of spinning box is maintained to the oil body, the heat insulation box can reduce the scattering and disappearing of the heat of insulation can, thereby utilize the heat of oil body to prolong the cooling time of the spinning solution in measuring pump and the delivery pipe as far as, provide the spinning solution in enough long time will delivering pipe and the measuring pump for the staff and take out, the damage of measuring pump and delivery pipe has been reduced, the manufacturing cost of enterprise has been reduced. By arranging the filtering component, the size of the staggered opening can be adjusted by utilizing the staggered positions of the filtering plate and the filtering frame, so that the filtering of melts with different diameters is convenient to realize, and the filtering device is convenient and fast to use; through setting up reciprocal drive assembly, utilize to lack the intermittent type contact realization of a gear and two upper and lower racks to the reciprocating motion of opening frame, the opening frame drives the bracing piece and removes the bracing piece and drive the filter frame and rock to the realization is to the screening with higher speed of fuse-element. Through setting up conveying assembly, play the effect of carrying to the fuse-element, use manpower sparingly.

The invention also discloses a production method of the heat preservation device for the wear-resistant low-shrinkage polyester drawn yarns, which aims to provide a production method which has simple process and low requirement on equipment and is suitable for industrial large-scale production, and comprises the following steps:

in order to achieve the purpose, the invention comprises the following steps:

s1, conveying a melt: firstly, starting a material conveying motor to enable the material conveying motor to drive a conveying shaft to rotate, the conveying shaft drives a spiral blade to rotate, and then, conveying a melt into a conveying cylinder through a conical hopper;

s2, screening the melt: selecting proper crushed aggregates according to the actually required diameter of the crushed aggregates, firstly, rotating the threaded rods leftwards to enable the two threaded rods to move leftwards, driving the filter plate to move by the threaded rods, driving the sliding rods to move by the filter plate, moving the sliding rods in the sliding grooves to realize the dislocation of the first filter holes and the second filter holes, and screening the melts with different diameters according to the size of the dislocation;

s3, shaking the melt: the motor drives the rotating shaft to rotate through driving the motor, the rotating shaft drives the block-lacking gear to rotate, the opening frame is reciprocated by utilizing the intermittent contact of the block-lacking gear and the upper rack and the lower rack, the opening frame drives the connecting rod to move, and the connecting rod drives the filtering frame to shake, so that the melt is screened in an accelerated manner;

s4, melt spinning: heating the melt, then feeding the heated melt into a distribution pipe, feeding the heated melt into a branch pipe II through a branch pipe I and a metering pump in sequence, and then discharging the melt through a spinneret plate;

s5, heating the heat preservation box: oil bodies are input into the heat insulation box of the oil inlet pipe box, and then the electric heating wire is heated, so that the oil bodies are heated, the internal temperature of the spinning box is heated and insulated, and the branch pipe is prevented from being blocked due to power failure in the spinning box.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged schematic view of the structure at A in FIG. 1;

fig. 3 is a schematic diagram of the structure of a spinneret in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of a via in an embodiment of the invention.

Reference numerals

1. A heat insulation box; 2. a heat preservation box; 3. an electric heating wire; 4. spinning manifold; 5. a dispensing tube; 6. a first branch pipe; 7. a second branch pipe; 8. a metering pump; 9. an oil inlet pipe; 10. an oil outlet pipe; 11. a spinneret plate; 12. a guide hole; 13. a transition hole; 14. capillary pores; 22. a filter box; 23. inserting a rod; 24. the spring is tightly propped; 25. placing a plate; 26. a wire outlet cylinder; 39. a material conveying motor; 40. a transfer drum; 41. a conical hopper; 42. a delivery shaft; 43. a helical blade; 44. a filter frame; 45. a filter plate; 46. laminating cloth; 47. a first filtering hole; 48. A second filtering hole; 49. a threaded rod; 50. an L-shaped rod; 51. a slide bar; 52. a chute; 53. a cross bar; 54. A vertical rod; 55. an opening frame; 56. a rack; 57. a block-lacking gear; 58. a rotating shaft; 59. a connecting rod.

Detailed Description

Technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present disclosure.

The terms first, second and the like in the description and in the claims of the present application are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It will be appreciated that the data so used may be interchanged under appropriate circumstances such that embodiments of the application are capable of operation in other sequences than those illustrated or described herein, and that the terms "first," "second," etc. generally refer to a class of objects and do not limit the number of objects, for example, a first object may be one or more. In the specification and claims, "and/or" indicates at least one of connected objects, and a character "/" generally indicates that a preceding and succeeding related object is in an "or" relationship.

The embodiments of the present application are described in detail below with reference to the accompanying drawings through specific embodiments and application scenarios thereof.

Example 1:

as shown in fig. 1 to 4, this embodiment provides a method for producing a wear-resistant low-shrinkage polyester drawn yarn, which includes a polyester drawn yarn, and the polyester drawn yarn is polymerized by a four-pot process, i.e., two-stage esterification, one-stage pre-polycondensation, and one-stage final polycondensation. The preparation method comprises the steps of preparing Purified Terephthalic Acid (PTA) and ethylene glycol (MEG) according to a process proportion, carrying out chemical reaction under the conditions of certain temperature, pressure and the like, carrying out esterification, pre-polycondensation and final polymerization in sequence through a catalyst to obtain a PET melt, and conveying the PET melt to a spinning workshop through a high-temperature melt conveying pump. Then the melt is conveyed to a spinning box 4 by a melt booster pump and a melt metering pump 8 for spinning, extruding, cooling, drafting and winding forming. A heating plate device is added in the drafting stage, namely the tows wind 6.5 circles at the temperature of a GR1 hot roller of 94 ℃, enter a GR2 hot roller of 136.5 ℃ and wind 5.5 circles, and then enter the heating plate device; the heating plate is a cuboid with the width of 20 cm and the length of 60 cm, a heating pipe is arranged in the heating plate, and heat insulation materials are arranged on the inner side of the heating plate; the elongation at break of the fiber can be improved by adopting a lower GR1 speed of 1350m/min and a higher GR2 speed of 4800m/min, namely the draft multiple of 3.71.

By adopting the scheme, the shape-keeping performance of the product is improved; the fiber has high breaking strength and elongation at break, is not easy to rub and break, can form entanglement on the surface of the fabric after long-time rubbing, and is not easy to fall off from the surface of the fabric.

The process flow comprises the following steps: slurry preparation → first esterification → second esterification → polymerization pre-polycondensation → polymerization final polymerization kettle → booster pump → spinning assembly extrusion → cooling molding → oiling → GR1 heat roller → GR2 heat roller → heating plate → wire guide hook → winding molding.

The specific process parameters are as follows: the molar ratio of EG/PTA is 1.2, the PTA liquid level is 70%, the slurry preparation temperature is 70%, and on the basis, a catalyst is added, and the flow rate of the catalyst is 850kg/h; the first esterification stirring speed is 30rpm, the reaction temperature is 269 ℃, the liquid level is 87.5 percent, and the pressure is 102.5kpa; the stirring speed of the second esterification is 33.5rpm, the reaction temperature is 274.5 ℃, the liquid level is 88 percent, and the pressure is 36kpa; the polymerization pre-polycondensation is controlled by different process parameters of an upper chamber and a lower chamber, wherein the process parameters of the upper chamber are as follows: the reaction temperature is 279 ℃, the liquid level is 38.5 percent, the pressure is 15kpa, and the stirring speed is 27rpm; the lower chamber process parameters are: the reaction temperature is 283 ℃, the liquid level is 75 percent, the pressure is 2.85kpa, and the stirring speed is 4.9rpm; the reaction temperature of the polymerization final polymerization kettle is 287.5 ℃, the liquid level is 45%, the pressure is 220pa, and the stirring speed is 3.4rpm; the pressure before the booster pump is 5Mpa, and the pressure after the booster pump is 17.5Mpa.

The extrusion is carried out on a circular spinneret plate 11 with 36 spinneret orifices, the spinneret plate 11 is distributed in a diamond shape, each spinneret orifice comprises a guide hole 12 and a transition hole 13 fixedly connected with one end of the guide hole 12, and the other end of the transition hole 13 is provided with a capillary hole 14.

By adopting the scheme, the fiber is uniformly cooled, and the fluidity of the melt and the full relaxation of the melt in the component are ensured.

The bottom of the sand cup of the component adopts a metal non-woven fabric super-felt filter material, and 60g of 40-mesh metal sand, 50-mesh filter screen, 60g of 60-80-mesh metal sand, 50-mesh screen and 50g of 80-100-mesh metal sand are sequentially placed in the sand cup.

By adopting the scheme, the pressure of the melt passing through the metal sand is more uniform, and the breaking strength of the fiber is improved.

Example 2:

the difference between the embodiment and the embodiment 1 is only that a heating plate device is added in the drafting stage, namely, the filament bundle is wound for 6.5 circles at the temperature of 90 ℃ of a GR1 hot roller and is wound for 5.5 circles at the temperature of 135 ℃ of a GR2 hot roller, and then enters the heating plate device; the elongation at break of the fiber can be improved by adopting a lower GR1 speed of 1200m/min and a higher GR2 speed of 4600m/min, namely the draft multiple of 3.25; the molar ratio of EG/PTA is 1.1, the PTA liquid level is 65%, the slurry preparation temperature is 65%, and on the basis, a catalyst is added, and the flow rate of the catalyst is 800kg/h; the first esterification stirring speed is 28rpm, the reaction temperature is 268 ℃, the liquid level is 85 percent, and the pressure is 100kpa; the stirring speed of the second esterification is 32rpm, the reaction temperature is 274 ℃, the liquid level is 87 percent, and the pressure is 35kpa; the polymerization and precondensation is divided into the control of different process parameters of an upper chamber and a lower chamber, wherein the process parameters of the upper chamber are as follows: the reaction temperature is 278 ℃, the liquid level is 38 percent, the pressure is 14kpa, and the stirring speed is 26rpm; the lower chamber process parameters are: the reaction temperature is 282 ℃, the liquid level is 74%, the pressure is 2.8kpa, and the stirring speed is 4.8rpm; the polymerization final polymerization kettle has the reaction temperature of 287 ℃, the liquid level of 40 percent, the pressure of 210pa and the stirring speed of 3.3rpm; the pressure before the booster pump is 4Mpa, and the pressure after the booster pump is 15Mpa.

Example 3:

the utility model provides a heat preservation device of wear-resisting low shrinkage factor dacron draft silk, it includes thermal-insulated case 1, set up the spinning case in thermal-insulated case 1, set up the spinning subassembly in the spinning case, set up the heating heat preservation subassembly in thermal-insulated case 1, set up the fuse-element filter box 22 at thermal-insulated case 1 top, set up the fuse-element filtering component in filter box 22, set up on filter box 22 and with the reciprocating drive subassembly of fuse-element filtering component cooperation use, set up the fuse-element conveying component at filter box 22 lateral wall top. The heating and heat-insulating assembly comprises an insulating box 2 which is arranged in the heat-insulating box 1 and wraps the spinning box body 4, an oil inlet pipe 9 which is arranged at the top of the heat-insulating box 1 in a penetrating way and is communicated with the insulating box 2, an oil outlet pipe 10 which is arranged on the outer side wall of the heat-insulating box 1 in a penetrating way and is communicated with the insulating box 2, and an electric heating wire 3 which is arranged in the insulating box 2; the spinning assembly comprises a distribution pipe 5 which is arranged at the top of the heat preservation box 2 in a penetrating mode and communicated with the filter box 22, a first branch pipe 6 which is arranged in bilateral symmetry and communicated with the distribution pipe 5, a metering pump 8 arranged on the first branch pipe 6, a first yarn outlet cylinder 26 which is arranged at the bottom of the spinning box in a penetrating mode and extends out through the heat preservation box 2 and the heat insulation box 1, a second branch pipe 7 which is arranged at the top opening of the first yarn outlet cylinder 26 in a penetrating mode and communicated with the first branch pipe 6, and a spinneret plate 11 fixedly arranged between the bottoms of the two second branch pipes 7.

By adopting the scheme, through the matching of the heating and heat-insulating component and the spinning component, the oil body is injected into the heat-insulating box 2 when the spinning device is used, and then the heat of the electric heating wire 3 is matched, so that after the device is powered off, the heat of the spinning box body 4 is maintained by the oil body, the heat insulation box 1 can reduce the heat loss of the heat-insulating box 2, the cooling time of the spinning solution in the metering pump 8 and the distribution pipe 5 is prolonged as much as possible by utilizing the heat of the oil body, the working personnel can be provided with enough time to take out the distribution pipe 5 and the spinning solution in the metering pump 8, the damage to the metering pump 8 and the distribution pipe 5 is reduced, and the production cost of enterprises is reduced.

The filtering component comprises a connecting rod 59 movably arranged on the left side wall of the filtering box 22 in a penetrating mode, an inserted rod 23 movably arranged on the right side wall of the filtering box 22 in a penetrating mode, a filtering frame 44 arranged between the connecting rod 59 and the inserted rod 23, a jacking spring 24 arranged between the filtering frame 44 and sleeved on the inserted rod 23, a bonding cloth 46 fixedly arranged between the outer end edge of the top of the filtering frame 44 and the inner side wall of the filtering box 22, a plurality of first filtering holes 47 formed in the bottom of the filtering frame 44, two L-shaped rods 50 symmetrically arranged at the bottom of the filtering frame 44 in a bilateral mode, a threaded rod 49 which is arranged on the L-shaped rod 50 in a penetrating mode in the horizontal direction and in threaded connection with the L-shaped rods 50, a filtering plate 45 arranged between the two threaded rods 49 and in rotating connection with the threaded rod 49, a second filtering hole 48 arranged on the filtering plate 45 and matched with the first filtering hole 47, a sliding chute 52 arranged on the L-shaped rod 50, and a sliding rod 51 arranged at the bottom of the filtering plate 45 and in sliding connection with the sliding chute 52; the reciprocating driving assembly comprises a placing plate 25 arranged on the filter box 22, a motor arranged on the front side wall of the placing plate 25, a rotating shaft 58 which is arranged on the placing plate 25 in a penetrating manner and coaxially rotates with the motor output end fixedly connected, a block-lacking gear 57 fixedly arranged on the rotating shaft 58, an opening frame 55 which is arranged on the outer side of the filter box 22 and fixedly connected with a connecting rod 59, two racks 56 which are arranged on the upper side and the lower side in the opening frame 55, the block-lacking gear 57 is arranged between the two racks 56, a cross rod 53 is horizontally arranged on the outer side wall of the filter box 22, and a vertical rod 54 which is sleeved on the cross rod 53 is fixedly arranged on the opening frame 55. By arranging the filtering component, the size of the staggered opening can be adjusted by utilizing the staggered positions of the filtering plate 45 and the filtering frame 44, so that the filtering of melts with different diameters can be conveniently realized, and the filtering device is convenient and fast to use; through setting up reciprocal drive assembly, utilize the intermittent type contact realization of lacking piece gear 57 and two upper and lower racks 56 to the reciprocating motion of opening frame 55, opening frame 55 drives the bracing piece and removes the bracing piece and drive filtration frame 44 and shake to the realization is to the screening with higher speed of fuse-element.

The melt conveying component comprises a conveying cylinder 40 arranged on the outer side wall of the filter box 22 in a penetrating mode, a conveying motor 39 arranged at the left end of the conveying cylinder 40, a conveying shaft 42 arranged in the conveying cylinder 40 and fixedly connected with the output end of the conveying motor 39 in a coaxial rotating mode, a spiral blade 43 arranged on the conveying shaft 42, and a conical hopper 41 arranged at the top of the conveying cylinder 40 in a penetrating mode. Through setting up conveying assembly, play the effect of carrying to the fuse-element, save the manpower.

Example 4:

a production method of a heat preservation device of wear-resistant low-shrinkage polyester drawn yarns comprises the following specific steps:

s1, conveying a melt: firstly, starting a material conveying motor 39, enabling the material conveying motor 39 to drive a conveying shaft 42 to rotate, driving a spiral blade 43 to rotate by the conveying shaft 42, and then conveying a melt into a conveying cylinder 40 through a conical hopper 41;

s2, screening the melt: selecting proper crushed aggregates according to the diameter of the crushed aggregates required actually, firstly, rotating the threaded rods 49 leftwards to enable the two threaded rods 49 to move leftwards, driving the filter plate 45 to move by the threaded rods 49, driving the slide rods 51 to move by the filter plate 45, moving the slide rods 51 in the sliding grooves 52 to realize dislocation of the first filter hole 47 and the second filter hole 48, and screening the melts with different diameters according to the size of the dislocation;

s3, shaking the melt: the motor is driven to drive the rotating shaft 58 to rotate, the rotating shaft 58 drives the block-lacking gear 57 to rotate, the opening frame 55 is reciprocated by utilizing the intermittent contact of the block-lacking gear 57 and the upper and lower racks 56, the opening frame 55 drives the connecting rod 59 to move, and the connecting rod 59 drives the filtering frame 44 to shake, so that the melt is screened in an accelerated manner;

s4, melt spinning: the melt is heated and then enters a distribution pipe 5, and then enters a branch pipe II 7 through a branch pipe I6 and a metering pump 8 in sequence, and then is discharged through a spinneret plate 11;

s5, heating and insulating box 2: the oil body is input into the box insulation can 2 through the oil inlet pipe 9, then the electric heating wire 3 is heated, so that the oil body is heated, the heating and heat preservation effects are achieved on the internal temperature of the spinning box, and the situation that the branch pipe is blocked due to the power failure inside the spinning box body 4 is avoided.

While the present embodiments have been described with reference to the accompanying drawings, it is to be understood that the invention is not limited to the precise embodiments described above, which are meant to be illustrative and not restrictive, and that various changes may be made therein by those skilled in the art without departing from the scope of the invention as defined by the appended claims.

Claims

1. A production method of wear-resistant low-shrinkage polyester drawn yarns is characterized by comprising the following steps of: the polyester drawn yarn polymerization adopts four-kettle process technology, namely two-stage esterification, one-stage pre-polycondensation and one-stage final polycondensation, fine terephthalic acid (PTA) and ethylene glycol (MEG) are prepared according to the process proportion, chemical reaction is carried out, esterification, pre-polycondensation and final polycondensation are successively carried out through a catalyst to prepare PET melt, and the PET melt is conveyed to a spinning workshop through a high-temperature melt conveying pump. The melt is conveyed to a spinning box body through a melt booster pump and a melt metering pump to be spun, extruded, cooled, drawn and wound for forming, and a heating plate device is added in the drawing stage, namely the filament bundle is wound for 6.5 circles at the temperature of 90-98 ℃ in a GR1 hot roller, and enters a GR2 hot roller for 5.5 circles at the temperature of 135-138 ℃ and then enters the heating plate device; the heating plate is a cuboid with the width of 20 cm and the length of 60 cm, a heating pipe is arranged in the heating plate, and heat insulation materials are arranged on the inner side of the heating plate; the elongation at break of the fiber can be improved by adopting a lower GR1 speed of 1200-1500m/min and a higher GR2 speed of 4600-5000m/min, namely the draft multiple of 3.25-4.17.

2. The production method of the wear-resistant low-shrinkage polyester drawn yarn according to claim 1, characterized in that: the process flow comprises the following steps: slurry preparation → first esterification → second esterification → polymerization precondensation → polymerization final polymerization kettle → booster pump → spinning pack extrusion → cooling molding → oiling → GR1 hot roller → GR2 hot roller → heating plate → guide wire → winding molding.

3. The production method of the wear-resistant low-shrinkage polyester drawn yarn according to claim 1, characterized in that: the specific technological parameters are as follows: the mol ratio of EG/PTA is 1.1-1.3, the PTA liquid level is 65-75%, the slurry preparation temperature is 65-75%, and on the basis of the slurry preparation temperature, a catalyst is added, and the flow rate of the catalyst is 800-900kg/h; the first esterification stirring speed is 28-32rpm, the reaction temperature is 268-270 ℃, the liquid level is 85-90 percent, and the pressure is 100-105kpa; the stirring speed of the second esterification is 32-35rpm, the reaction temperature is 274-275 ℃, the liquid level is 87-89%, and the pressure is 35-37kpa; the polymerization precondensation is divided into the control of different process parameters of an upper chamber and a lower chamber, wherein the process parameters of the upper chamber are as follows: the reaction temperature is 278-280 ℃, the liquid level is 38-39%, the pressure is 14-16kpa, and the stirring speed is 26-28rpm; the lower chamber process parameters are: the reaction temperature is 282-284 ℃, the liquid level is 74-76%, the pressure is 2.8-2.9kpa, and the stirring speed is 4.8-5.0rpm; the reaction temperature of the polymerization final polymerization kettle is 287 to 288 ℃, the liquid level is 40 to 50 percent, the pressure is 210 to 230pa, and the stirring speed is 3.3 to 3.5rpm; the pressure before the booster pump is 4-6MPa, and the pressure after the booster pump is 15-20MPa.

4. The production method of the wear-resistant low-shrinkage polyester drawn yarn as claimed in claim 1, characterized in that: the extrusion is carried out on a circular spinneret plate with 36 spinneret orifices, the spinneret plate is distributed in a diamond shape, each spinneret orifice comprises a guide hole and a transition hole fixedly connected with one end of each guide hole, and a capillary hole is formed in the other end of each transition hole.

5. The production method of the wear-resistant low-shrinkage polyester drawn yarn according to claim 1, characterized in that: the bottom of the sand cup of the component adopts a metal non-woven fabric super-felt filter material, and 60g of 40-mesh metal sand, 50-mesh filter screen, 60g of 60-80-mesh metal sand, 50-mesh screen and 50g of 80-100-mesh metal sand are sequentially placed in the sand cup.

6. A heat-insulating device suitable for the wear-resistant low-shrinkage polyester drawn yarn of claim 1, characterized in that: the device comprises a heat insulation box, a spinning box arranged in the heat insulation box, a spinning assembly arranged in the spinning box, a heating and heat-preserving assembly arranged in the heat insulation box, a melt filtering box arranged at the top of the heat insulation box, a melt filtering assembly arranged in the filtering box, a reciprocating driving assembly arranged on the filtering box and matched with the melt filtering assembly, and a melt conveying assembly arranged at the top of the outer side wall of the filtering box; the heating and heat-insulating assembly comprises a heat-insulating box which is arranged in the heat-insulating box and wraps the spinning box body, an oil inlet pipe which is arranged at the top of the heat-insulating box in a penetrating way and is communicated with the heat-insulating box, an oil outlet pipe which is arranged on the outer side wall of the heat-insulating box in a penetrating way and is communicated with the heat-insulating box, and an electric heating wire which is arranged in the heat-insulating box; the spinning assembly comprises a distribution pipe which is arranged at the top of the insulation box in a penetrating mode and is communicated with the filter box, a first branch pipe which is arranged in a bilateral symmetry mode and is communicated with the distribution pipe, a metering pump arranged on the first branch pipe, a second branch pipe which is arranged at the bottom of the spinning box in a penetrating mode and extends out through the insulation box and the heat insulation box, a second branch pipe which is arranged at an opening at the top of the first branch pipe in a penetrating mode and is communicated with the first branch pipe, and a spinneret plate fixedly arranged between the bottoms of the two branch pipes.

7. The heat preservation device for the wear-resistant low-shrinkage polyester drawn yarns according to claim 6, characterized in that: the filter assembly comprises a connecting rod movably arranged on the left side wall of the filter box in a penetrating mode, an inserted rod movably arranged on the right side wall of the filter box in a penetrating mode, a filter frame arranged between the connecting rod and the inserted rod, a jacking spring arranged between the filter frames and sleeved on the inserted rod, a piece of laminating cloth fixedly arranged between the outer end edge of the top of the filter frame and the inner side wall of the filter box, a plurality of filter holes I formed in the bottom of the filter frame, two L-shaped rods arranged at the bottom of the filter frame in a bilateral symmetry mode, a threaded rod arranged on the L-shaped rods in a penetrating mode in the horizontal direction and in threaded connection with the L-shaped rods, a filter plate arranged between the two threaded rods and in rotary connection with the threaded rod, filter holes II formed in the filter plate and matched with the filter holes I, a sliding chute formed in the L-shaped rods, and a sliding rod arranged at the bottom of the filter plate and in sliding connection with the sliding chute; the reciprocating driving assembly comprises a placing plate arranged on the filter box, a motor arranged on the front side wall of the placing plate, a rotating shaft which penetrates through the placing plate and is fixedly connected with the output end of the motor to rotate coaxially, a block lacking gear fixedly arranged on the rotating shaft, an opening frame which is arranged on the outer side of the filter box and is fixedly connected with the connecting rod, and two racks which are arranged on the upper side and the lower side in the opening frame, wherein the block lacking gear is arranged between the two racks, a cross rod is horizontally arranged on the outer side wall of the filter box, and a vertical rod sleeved on the cross rod is fixedly arranged on the opening frame; the melt conveying assembly comprises a conveying cylinder arranged on the outer side wall of the filter box in a penetrating mode, a conveying motor arranged at the left end of the conveying cylinder, a conveying shaft arranged in the conveying cylinder and coaxially rotating with the output end of the conveying motor, a spiral blade arranged on the conveying shaft, and a conical hopper arranged at the top of the conveying cylinder in a penetrating mode.

8. The production method of the heat preservation device suitable for the wear-resistant low-shrinkage polyester drawn yarn in the claim 6 is characterized by comprising the following specific steps of:

s1, conveying a melt: firstly, starting a material conveying motor to drive a conveying shaft to rotate, driving a helical blade to rotate by the conveying shaft, and conveying a melt into a conveying cylinder through a conical hopper;

s2, screening the melt: selecting proper crushed aggregates according to the actually required diameter of the crushed aggregates, firstly, rotating the threaded rods leftwards to enable the two threaded rods to move leftwards, driving the filter plate to move by the threaded rods, driving the slide rods to move by the filter plate, moving the slide rods in the sliding grooves to realize the dislocation of the first filter holes and the second filter holes, and screening the melts with different diameters according to the size of the dislocation;

s3, shaking the melt: the motor drives the rotating shaft to rotate through driving the motor, the rotating shaft drives the block-lacking gear to rotate, the opening frame is reciprocated through intermittent contact of the block-lacking gear and the upper rack and the lower rack, the opening frame drives the connecting rod to move, and the connecting rod drives the filtering frame to shake, so that melt is screened in an accelerated manner;

s5, heating and insulating box: oil bodies are input into the heat insulation box of the oil inlet pipe box, and then the electric heating wire is heated, so that the oil bodies are heated, the internal temperature of the spinning box is heated and insulated, and the branch pipe is prevented from being blocked due to power failure in the spinning box.