CN210117494U - Flash spinning fiber post-treatment equipment - Google Patents

Abstract

The utility model relates to a flash spinning fiber post-processing device, which comprises a fiber web conveying device, a drafting machine and a cross lapping machine, wherein the drafting machine comprises a frame, a plurality of groups of drafting roller pairs and a first servo motor; aftertreatment equipment can carry out alternately layup after the draft with single-deck fiber web, also can carry out the draft after alternately layup with single-deck fiber web, the utility model discloses an aftertreatment equipment can improve and optimize the arrangement direction of fibre in the fiber web, makes the fibre can be in the warp direction and the latitudinal direction of network material homogeneous distribution of homoenergetic, has promoted fibrous orientation degree.

Description

Flash spinning fiber post-treatment equipment

Technical Field

The utility model belongs to spinning fibre aftertreatment processing field, in particular to dodge and spin fibre aftertreatment equipment.

Background

The flash evaporation method of spinning and web-forming technology is a technology of practical new-type in the last sixties of century by DuPont company, it is through mixing the solution that dissolves polymer and solvent under the environment of high temperature and high pressure to spray from the spinneret orifice to the environment of normal atmospheric temperature, the solvent in the solution evaporates rapidly from the liquid phase under high temperature and high pressure to the environment of normal atmospheric temperature and pressure, the polymer solute in the solution is from the liquid state under high temperature, solidify rapidly after cooling, through the extrusion, drafting, scattering effect of the spinneret orifice, form a continuous fiber bundle containing a lot of superfine fibers, the fiber bundle sprays to the swinging wire disc, the swinging wire disc refracts and disperses the fiber bundle into a net-like structure, and then swing and lay the fiber net that is in the form of slice on the moving net curtain, form a layer of fiber net with certain gram weight and width, the fiber net passes the conventional after-treatment, such as cold rolling, hot rolling and softening, the non-woven fabric material with light weight, water resistance and air permeability can be obtained.

However, the fiber web obtained by the flash evaporation spinning method has insufficient fiber stretching multiple and low fiber molecular orientation and crystallinity, so that the breaking strength of the fiber itself is low, and further the breaking strength and tearing strength of the non-woven fabric obtained from the fiber web are affected. And due to the technical characteristics of spinning fibers by a flash evaporation method, after the fiber tows are subjected to the action of a fiber swinging disc, the arrangement direction of the fiber tows paved on the movable net curtain tends to be vertical to the advancing direction of the movable net curtain, namely, the arrangement direction of the fibers inside the non-woven fabric material prepared by the conventional method tends to the weft direction of the non-woven fabric, the fibers in the warp direction are arranged rarely, so that the non-woven fabric material is broken and strongly asymmetrical in the warp direction and the weft direction, and the service life of the material is shortened.

SUMMERY OF THE UTILITY MODEL

To the problem, the utility model provides a fibre aftertreatment equipment spins in sudden strain of a muscle.

A flash spun fiber post-processing apparatus comprising a fiber web transport, a draw machine, and a cross lapper;

the drafting machine comprises a rack, a plurality of groups of drafting roller pairs and a first servo motor, the plurality of groups of drafting roller pairs rotate on the rack under the control of the first servo motor, each group of drafting roller pairs comprises an upper drafting roller and a lower drafting roller, card clothing covers the surfaces of the upper drafting roller and the lower drafting roller, and the upper drafting roller and the lower drafting roller rotate relatively and are used for drafting a fiber web arranged between the upper drafting roller and the lower drafting roller;

the cross lapping machine comprises a lapping frame, a first lapping curtain, a second lapping curtain, a tensioning slide roller set, an upper sliding frame, a laying sliding frame, a deflection roller set, a driving device and an output conveying curtain, wherein the first lapping curtain and the second lapping curtain are arranged oppositely and can clamp a single-layer fiber net to enter the upper sliding frame and the laying sliding frame;

the tensioning sliding roller set comprises a plurality of first tensioning rollers for tensioning the first lapping curtain and a plurality of second tensioning rollers for tensioning the second lapping curtain, and the plurality of first tensioning rollers and the plurality of second tensioning rollers are respectively distributed on two sides of the lapping frame;

the deflection roller group is distributed in the middle of the lapping frame, inside the upper sliding frame and above the lapping sliding frame and is used for deflecting the first lapping curtain and/or the second lapping curtain;

the driving device comprises a second servo motor for driving the tensioning sliding roller group to rotate, a third servo motor for driving the deflection roller group to rotate and a reciprocating motor for driving the laying sliding frame to reciprocate;

lay the balladeur train and be located the top of curtain is carried in the output, lay and offer the play net mouth that is used for the whereabouts of individual layer fibre web on the balladeur train, lay the balladeur train and can pile up individual layer fibre web on the curtain is carried in the output.

Further, the web conveying device includes a first conveying device provided on an inlet side of the drawing machine or the cross lapper, and a second conveying device provided between the drawing machine and the cross lapper.

Further, the number of the drafting roller pairs is at least three.

Further, the rotating speeds of each group of the drawing roller pairs are different from each other, and the rotating speeds of the plurality of groups of the drawing roller pairs gradually increase from the position close to the inlet of the drawing machine to the position close to the outlet of the drawing machine.

Furthermore, a compression roller is arranged above the first lapping curtain, the compression roller rotates on the lapping frame, and an inner inlet of the lapping frame for the single-layer fiber net to enter is formed between the compression roller and the first lapping curtain.

Further, the deflection roller set comprises two sets of deflection rollers, wherein one set of deflection rollers is arranged inside the first web laying curtain for deflecting the first web laying curtain and the other set of deflection rollers is arranged inside the second web laying curtain for deflecting the second web laying curtain.

Further, the two sets of deflection rollers are distributed in the same position.

Further, the moving direction of the net laying frame is perpendicular to the falling direction of the single-layer fiber net.

Further, the direction of reciprocating motion of the lapping frame is perpendicular to the motion direction of the output conveying curtain.

The utility model provides a novel fibre aftertreatment equipment and method spin dodges can improve and optimize the arrangement direction of fibre in the fibre net, makes the fibre can be in the warp direction of network material and the even distribution of homoenergetic in the latitudinal direction, has not only promoted fibrous orientation degree, still promotes by the fibre and constitutes the physical and mechanical properties of fibre net, and then has increased the life that the flash distillation method made the non-woven materials. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 shows a schematic view of a web transfer device and a drawing machine according to the present invention;

figure 2 shows a schematic view of the structure of each set of pairs of drafting rollers according to the invention;

figure 3 shows a schematic view of multiple sets of draft roller pairs at different speeds in accordance with the present invention;

figure 4 shows a schematic structural view of a cross lapper according to the invention;

figure 5 shows a schematic deflection roller set distribution according to the present invention;

figure 6 shows a schematic view of the laying carriage structure according to the invention;

figure 7 shows a schematic drawing of the structure of the prior drawing and then the laying according to the present invention;

figure 8 shows a schematic view of the structure of the pre-lay-up and post-draft according to the present invention.

Description of the drawings: 1. a web transport device; 11. a first conveying device; 12. a second conveying device; 2. a drawing machine; 21. a frame; 22. a feeding curtain; 23. an output curtain; 24. a plurality of groups of drafting roller pairs; 241. an upper draft roller; 242. a lower drafting roller; 25. a first servo motor; 3. a cross lapping machine; 31. laying a net rack; 311. a delivery curtain; 312. a compression roller; 32. a first lapping curtain; 33. a second lapping curtain; 34. tensioning the pulley sets; 341. a first tension roller; 342. a second tension roller; 35. an upper carriage; 36. laying a sliding frame; 361. a network outlet; 362. a gear; 363. a rack; 37. a deflection roller set; 371. a first deflection roller; 372. a second deflection roller; 373. a third deflection roller; 374. a fourth deflection roller; 375. a fifth deflection roller; 376. a sixth deflection roller; 38. outputting the conveying curtain; 4. a single layer web; 5. a single layer of cross-web fibers; 6. and (3) crossing the fiber web layers.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention are clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

A flash spun fiber post-processing device comprises a fiber web conveying device 1, a drafting machine 2 and a cross lapping machine 3. The flash spun fiber can be firstly drafted by the drafting machine 2 and then enters the cross lapping machine 3 to obtain a cross fiber net layer, and can also be firstly stacked by the cross lapping machine 3 and then drafted by the drafting machine 2 to obtain the cross fiber net layer.

The embodiment of the invention is illustrated in fig. 7 with the single layer web 4 entering the draw machine 2 and then the cross lapper 3.

The web conveying device 1 comprises a first conveying device 11 and a second conveying device 12, wherein the first conveying device 11 is arranged at one side of the drafting machine 2, and conveys the single-layer fiber web 4 prepared by the flash evaporation method into the drafting machine 2 to form a single-layer crossed fiber web 5 through the drawing of the drafting machine 2. A second conveying device 12 is arranged on the side of the drafting machine 2 far away from the first conveying device 11, the second conveying device 12 is used for conveying the single-layer crossed fiber web 5 separated from the drafting machine 2, and a cross lapping machine 3 is arranged on the side of the second conveying device 12 far away from the drafting machine 2. The cross lapper 3 is configured to receive the single-layer cross fiber web 5 transferred by the second transfer device 12, lay the single-layer cross fiber web 5 into a cross fiber web layer 6, and output the cross fiber web layer 6 to the next process. The operation of the fiber web conveying device 1, the drafting machine 2 and the cross lapping machine 3 is controlled by a control system.

Drafting machine 2 includes frame 21, feeding curtain 22, output curtain 23, multiunit draft roller pair 24 and first servo motor 25, feeding curtain 22, output curtain 23, multiunit draft roller team 24 and first servo motor 25 are all installed in frame 21, feeding curtain 22 is close to first conveyer 11 and sets up, can receive the individual layer fibre web 4 that first conveyer 11 carried, transport single layer fibre web 4 to multiunit draft roller pair 24 in, multiunit draft roller pair 24 sets up the one side of keeping away from first conveyer 11 at feeding curtain 22, multiunit draft roller pair 24 is kept away from one side of feeding curtain 22 and is provided with output curtain 23.

The plurality of sets of the draft roller pairs 24 at least include three or more sets of draft roller pairs, and the plurality of sets of the draft roller pairs 24 are arranged at equal intervals. The rotating speed of each group of the drawing roller pairs is gradually increased from one side close to the feeding curtain 22 to one side close to the output curtain 23, namely the rotating speed of the drawing roller pair close to one side of the output curtain 23 is the maximum.

As shown in fig. 2, each set of draft roller pairs includes an upper draft roller 241 and a lower draft roller 242, the upper draft roller 241 and the lower draft roller 242 are aligned and parallel up and down, and the upper draft roller 241 and the lower draft roller 242 have the same size and are both perpendicular to the frame 21. The upper drafting roller 241 and the lower drafting roller 242 are driven by the first servo motor 25, respectively, so that the upper drafting roller 241 and the lower drafting roller 242 rotate on the frame 21. The plurality of first servo motors 25 are all controlled in a unified manner by the control system.

The upper drafting roller 241 and the lower drafting roller 242 in the same drafting roller pair set rotate at the same speed and in opposite directions. The single-layer web 4 is disposed between the upper drawing roller 241 and the lower drawing roller 242, the upper surface of the single-layer web 4 is in contact with the upper drawing roller 241, and the lower surface of the single-layer web 4 is in contact with the lower drawing roller 242. The surfaces of the upper drafting roller 241 and the lower drafting roller 242 are covered with card clothing, so that the felting needles on the card clothing can stir the fiber filaments on the single-layer fiber web 4 to incline in the process of relative rotation of the upper drafting roller 241 and the lower drafting roller 242.

The quantity of draft roller pair can increase and decrease according to actual requirement in draft machine 2, exemplarily, the utility model discloses with setting up five groups of draft roller pairs and carrying out the exemplary explanation, as shown in fig. 3, five draft roller pairs are to the interval setting, every group draft roller corresponds different rotational speeds, from left to right, the rotational speed of five groups of draft roller pairs is V1, V2, V3, V4 and V5 in proper order, and V5 > V4 > V3 > V2 > V1, single-layer web 4 passes through after feeding into draft machine 2 through feeding curtain 22, loop through above-mentioned five groups of draft roller pairs, is carried by the draft roller pair draft;

in the process of conveying the single-layer fiber web 4 by the drawing roller pair, the calculation formula of the drawing value of the single-layer fiber web 4 is as follows:

the draft value Qn ═ V (n +1) -Vn ]/Vn ═ 100%; wherein n represents the number of pairs of drafting rollers in the drafting machine 2, and n is 1, 2, 3 and 4;

the total draft Q is Q1+ Q2+ Q3+ Q4.

When the single-layer fiber web 4 is drawn by the drawing rolls, the single-layer fiber web 4 is drawn, and the fibers in the single-layer fiber web 4 are displaced and drawn. Meanwhile, during the stretching process of the single-layer fiber web 4, the card clothing pushes and pulls the fibers in the single-layer fiber web 4, so that the arrangement direction of the fibers in the single-layer fiber web 4 is changed, namely, the fibers are offset from the weft arrangement direction to the warp direction. The arrangement direction of the fibers is changed from the most weft-direction arrangement to the partial weft-direction arrangement, the partial warp-direction arrangement and the partial oblique arrangement. After the fibers are drawn and elongated, the orientation of the fibers is improved, and the highly oriented fibers are beneficial to improving the tear strength of the single-layer fiber web 4, and the gram weight of the single-layer fiber web 4 is also correspondingly reduced. The drafted single-layer cross web 5 is discharged through the discharge curtain 23, falls onto the second conveyor 12, and is conveyed by the second conveyor 12 to the cross lapper 3.

The cross lapper 3 is used to lay up a single layer of cross web 5 into multiple layers of cross web layer 6 having a grammage such that the grammage of the cross web layer 6 is greater than the grammage of the single layer of web 4. As shown in fig. 4, the cross lapper 3 comprises a lapper frame 31, a first lapper curtain 32, a second lapper curtain 33, a tensioning roller set 34, an upper carriage 35, a laying carriage 36, a deflection roller set 37, a drive, a device carrier and an output conveyor curtain 38.

The net laying frame 31 is installed on the ground as an installation main body of the cross net laying machine 3, and the first net laying curtain 32, the second net laying curtain 33, the tensioning slide roller group 34, the upper carriage 35, the laying carriage 36, the deflecting roller group 37, the driving device and the output conveying curtain 38 are all installed on the net laying frame 31 through the equipment support. The side of the net laying frame 31 close to the second conveyor 12 is provided with a conveying curtain 311, and the conveying curtain 311 is used for receiving the single-layer crossed fiber net 5 conveyed by the second conveyor 12 and feeding the single-layer crossed fiber net 5 into the net laying frame 31. The first net laying curtain 32 is arranged on one side of the net laying frame 31 close to the conveying curtain 311, the second net laying curtain 33 is arranged on one side of the net laying frame 31 far away from the first net laying curtain 32, and the first net laying curtain 32 and the second net laying curtain 33 are all annular curtains connected end to end.

The tensioning roller set 34 comprises a number of first tensioning rollers 341 tensioning the first laying curtain 32, a number of second tensioning rollers 342 tensioning the second laying curtain 33. The number of the first tensioning rollers 341 is set according to the length of the first layering curtain 32, and a plurality of first tensioning rollers are arranged at intervals and are all distributed on one side of the layering frame 31 close to the conveying curtain 311. To ensure that the first layering curtain 32 has sufficient tension, the first tensioning roller 341 may be set to a different radius to tension the first layering curtain 32. The number of the second tensioning rollers 342 is set according to the length of the second lapping screen 33, and a plurality of the second tensioning rollers 342 are distributed at intervals on the side of the lapping frame 31 away from the first tensioning roller 341.

The port department that the fibre web 5 crossed into first lapping curtain 32 of individual layer was provided with compression roller 312, and compression roller 312 aligns the setting from top to bottom with one of them first tensioning roller 341, and first lapping curtain 32 cover is established in this first tensioning roller 341 top, compression roller 312 with be provided with the lapping frame 31 entry that is used for the fibre web 4 of individual layer to get into between the first lapping curtain 32, realize that the fibre web 5 crossed of individual layer is located first lapping curtain 32 top, compression roller 312 then is located the top that the fibre web 5 crossed of individual layer. The pressing roller 312 and the first tensioning roller 341 both rotate on the lapping frame 31, and the rotating directions of the pressing roller 312 and the first tensioning roller 341 below the pressing roller 312 are opposite, so that forward power can be provided for the single-layer crossed fiber web 5, meanwhile, the single-layer crossed fiber web 5 can be squeezed and unfolded, and the single-layer crossed fiber web 5 is prevented from being wrinkled and stacked after entering the cross lapping machine 3.

The deflection roller group 37 comprises two groups of deflection rollers, one group for deflecting the first web-laying curtain 32 and the other group for deflecting the second web-laying curtain 33, the number of the two groups of deflection rollers being set in accordance with the deflection angle of the first web-laying curtain 32 and the second web-laying curtain 33 and the two groups of deflection rollers being distributed in the same position. Two sets of deflection rollers are provided in the middle of the laying head 31, inside the upper carriage 35 and above the laying carriage 36, respectively. Two sets of deflection rollers are realized to cooperate with the first 341 and the second 342 tensioning rollers, so that the first 32 and the second 33 draping curtains are tensioned endless over the draping frame 31.

The single cross web 5 is brought into contact with the second layering screen 33 as the first layering screen 32 is transported, whereupon the first layering screen 32 and the second layering screen 33 clamp the single cross web 5 into the upper carriage 35 and are then clamped for transport over the laying carriage 36. The first and second laying curtains 32, 33 are moved away from each other under the deflection of the deflection roller above the laying carriage 36, so that the clamped single-layer cross web 5 is released above the laying carriage 36, and the single-layer web 4 falls into the laying carriage 36.

The drive means comprise a plurality of second servomotors arranged in correspondence with the set of tensioning rollers, a plurality of third servomotors arranged in correspondence with the set of deflection rollers 37 and a reciprocating motor arranged in correspondence with the laying carriage 36. Every first tensioning roller 341 and every second tensioning roller 342 all correspond and set up a second servo motor, and the second servo motor is installed on spreading rack 31 promptly, and first tensioning roller 341 or second tensioning roller 342 are installed on second servo motor's axis of rotation, realize that second servo motor drives first tensioning roller 341 and second tensioning roller 342 and rotate.

Every deflection roller all corresponds and sets up a third servo motor, and all rotates with third servo motor and be connected, and third servo motor all installs on lapping the net frame 31, realizes that third servo motor drives a plurality of deflection rollers and rotates on lapping the net frame 31. The reciprocating motor is mounted on the rack 31 for driving the laying carriage 36 to reciprocate along the length direction of the rack 31. And the plurality of second servo motors, the plurality of third servo motors and the reciprocating motor are all controlled in rotating speed through a control system.

The number and mounting positions of the deflection rollers are specifically set depending on the size of the grid 31, the length of the first web laying curtain 32 and the length of the second web laying curtain 33. Exemplarily, the deflection roller shown in fig. 5 is exemplified.

As shown in fig. 5, the deflection roller set 37 includes a first deflection roller 371, a third deflection roller 373, and a fifth deflection roller 375 disposed inside the first web laying curtain 32, and a second deflection roller 372, a fourth deflection roller 374, and a sixth deflection roller 376 disposed inside the second web laying curtain 33. The endless first layering curtain 32 is opened by a first plurality of tensioning rollers 341, a first deflection roller 371, a third deflection roller 373, and a plurality of fifth deflection rollers 375. The endless second laying curtain 33 is opened jointly by a plurality of second tensioning rollers 342, a second deflection roller 372, a plurality of fourth deflection rollers 374 and a sixth deflection roller 376.

A first deflecting roller 371 and a second deflecting roller 372 are provided in the middle of the laying frame 31, the first deflecting roller 371 is flush with the transfer curtain 311, and the second deflecting roller 372 is installed on the side of the first deflecting roller 371 remote from the first tension roller 341 and has a height lower than that of the first deflecting roller 371. The first and second deflecting rollers 371, 372 are staggered to ensure that the first and second layering curtains 32, 33 do not rub against each other. The first layering curtain 32 carries the single-layer crossing web 5 horizontally to the middle of the layering frame 31, and contacts with the second layering curtain 33 tensioned by the second deflection roller 372, so that the first layering curtain 32 and the second layering curtain 33 jointly clamp and transport the single-layer crossing web 5.

A third deflecting roller 373 and a fourth deflecting roller 374 are disposed inside the upper carriage 35, and the third deflecting roller 373 and the fourth deflecting roller 374 are both disposed below the first deflecting roller 371 and the second deflecting roller 372. The first web curtain 32 moves obliquely downward under the deflection of the first deflecting roller 371 and the third deflecting roller 373. The second web-laying curtain 33 is moved obliquely downwards in the same way as the first web-laying curtain 32 by the second 372 and fourth 374 deflection rollers. The first and second web-laying curtains 32, 33 change the moving direction of the single-layer crossing web 5 into the upper carriage 35, and the held single-layer crossing web 5 is separated from the upper carriage 35 by the cooperation of the first and second web-laying curtains 32, 33 to change the moving direction.

A fifth deflection roller 375 and a sixth deflection roller 376 are arranged above laying carriage 36, the fifth deflection roller 375 and the sixth deflection roller 376 are arranged on the side of laying frame 31 close to conveying curtain 311, and the fifth deflection roller 375 and the sixth deflection roller 376 are at the same height as upper carriage 35. The deflection of the fifth deflection roller 375 and the third deflection roller 373 causes the first layering curtain 32 to deflect in a horizontal state and move to a side near the conveying curtain 311. The deflection of the sixth deflection roller 376 and the fourth deflection roller 374 causes the second layering screen 33 to travel the same path as the first layering screen 32, and the first layering screen 32 and the second layering screen 33 continue to move in the deflection direction of gripping the single-ply crosswise web 5 above the laying carriage 36.

Since the first tensioning roller 341 and the second tensioning roller 342 are distributed on both sides of the laying frame 31, the first laying curtain 32 continues to approach one side of the conveying curtain 311 by being deflected and tensioned by the fifth deflection roller 375 and the first tensioning roller 341. While the second web-laying curtain 33 is moved to the side remote from the conveying curtain 311 by the deflecting tension of the sixth and second deflecting rollers 376 and 372. I.e., first and second layering curtains 32, 33 are spaced apart from each other above laying carriage 36 to release the gripped single-layer cross web 5, the single-layer cross web 5 will tend to fall into laying carriage 36. Fifth deflection roller 375 and sixth deflection roller 376 are realized to form a layering port above laying carriage 36 for the single-layer crossing web 5 to exit first and second layering curtains 32, 33 and enter laying carriage 36.

As shown in fig. 6, the laying carriage 36 is provided with a discharge port 361 through which the single-layer cross web 5 is discharged, and the laying carriage 36 is connected to the reciprocating mechanism. The reciprocating mechanism is connected with a reciprocating motor of the driving device, and the reciprocating motor drives the reciprocating mechanism to move, so that the laying sliding frame 36 is driven to reciprocate along the laying net rack 31. Output conveyor curtain 38 is disposed below discharge port 361, and the transport direction of output conveyor curtain 38 is perpendicular to the direction of movement of laying carriage 36, ensuring that single-layer cross web 5 can fall vertically onto output conveyor curtain 38. The laying carriage 36 reciprocates along the laying frame 31 under the action of the reciprocating motor to drive the single-layer crossed fiber web 5 to move left and right to be laid on the output conveying curtain 38, and the length of the output conveying curtain 38 is greater than that of the laying carriage 36, so that the single-layer crossed fiber web 5 falls and is stacked to form the crossed fiber web layer 6.

Illustratively, as shown in fig. 6, the reciprocating motor is fixed on the net laying frame 31, the reciprocating mechanism comprises two gears 362 and a rack 363 sleeved on the gears 362, one gear 362 is rotatably connected with the reciprocating motor, the other gear 362 directly rotates on the net laying frame 31, the laying carriage 36 is fixed on the rack 363, and the reciprocating motor sets the rotation speed and the stroke through the control system. After the reciprocating motor is started, the forward rotation drives the laying carriage 36 to clamp the single-layer crossed fiber web 5 and slide to one side, and the single-layer crossed fiber web 5 is transversely laid on the output conveying curtain 38 along with the falling of the single-layer crossed fiber web 5. And controlling a reciprocating motor to drive the laying carriage 36 to clamp the single-layer crossed fiber web 5 and slide towards the other side, and reversely laying the single-layer crossed fiber web 5 on the output conveying curtain 38 to form a fiber web layer. Since the conveying direction of output conveying curtain 38 is perpendicular to the driving direction of laying carriage 36, when a single-layer cross web 5 falls to form a target number of cross web layers 6, output conveying curtain 38 conveys cross web layers 6 away from laying frame 31.

The crossed fiber web layer 6 is further processed by cold pressing, hot rolling and softening to form a high-strength non-woven fabric material.

As shown in fig. 8, the present invention can also transmit the single-layer fiber web 4 to the cross lapper 3 through the transmission device, after being transmitted by the first lapper curtain 32 and the second lapper curtain 33 of the cross lapper 3, the single-layer fiber web 4 is cross-lapped on the output transmission curtain 38 through the action of the laying carriage 36 of the cross lapper 3, forming a multi-layer cross fiber web layer 6 with a certain width;

the fiber web layer is fed into the drafting machine 2 after being output by the output conveying curtain 38, the fiber web layer is fed into the drafting machine 2 by the feeding curtain 22 of the drafting machine 2, and the fiber web layer is drafted in the drafting machine 2 under the action of a plurality of groups of drafting roller pairs 24, so that the fiber arrangement direction in the fiber web layer is changed, the fiber orientation is improved, and the crossed fiber web layer 6 is obtained.

Through the embodiment of the utility model provides a draft process that sets up changes the interior fiber arrangement direction of single layer fiber net that the flash distillation method generated, promotes fibrous orientation, and the fiber web layer that has certain thickness is laid into with single layer fiber net through alternately lapping process. The obtained non-woven fabric material has the characteristics of proper thickness, dense fiber arrangement, tensile strength, wear resistance and the like no matter the non-woven fabric is laid after line drafting or drawn after first laying, and the problem that the non-woven fabric is easy to break due to a flash evaporation method is effectively solved.

Although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.

Claims (9)

1. Flash spun fiber post-treatment equipment, characterized in that the post-treatment equipment comprises a fiber web conveying device (1), a drafting machine (2) and a cross lapper (3);

the drafting machine (2) comprises a rack (21), a plurality of groups of drafting roller pairs (24) and a first servo motor (25), wherein the plurality of groups of drafting roller pairs (24) rotate on the rack (21) under the control of the first servo motor (25), each group of drafting roller pairs (24) comprises an upper drafting roller (241) and a lower drafting roller (242), the surfaces of the upper drafting roller (241) and the lower drafting roller (242) are covered with card clothing, and the upper drafting roller (241) and the lower drafting roller (242) rotate relatively and are used for drafting a fiber web arranged between the upper drafting roller (241) and the lower drafting roller (242);

the cross lapping machine (3) comprises a lapping frame (31), a first lapping curtain (32), a second lapping curtain (33), a tensioning roller set (34), an upper sliding frame (35), a lapping sliding frame (36), a deflection roller set (37), a driving device and an output conveying curtain (38), wherein the first lapping curtain (32) and the second lapping curtain (33) are arranged oppositely and can clamp a single-layer fiber net (4) to enter the upper sliding frame (35) and the lapping sliding frame (36);

the tensioning roller group (34) comprises a plurality of first tensioning rollers (341) for tensioning the first lapping screen (32) and a plurality of second tensioning rollers (342) for tensioning the second lapping screen (33), and the plurality of first tensioning rollers (341) and the plurality of second tensioning rollers (342) are respectively distributed on two sides of the lapping frame (31);

the deflection roller group (37) is distributed in the middle of the net laying frame (31), inside the upper carriage (35) and above the laying carriage (36) and is used for deflecting the first net laying curtain (32) and/or the second net laying curtain (33);

the driving device comprises a second servo motor for driving the tensioning sliding roller group (34) to rotate, a third servo motor for driving the deflection roller group (37) to rotate and a reciprocating motor for driving the laying sliding frame (36) to reciprocate;

the laying carriage (36) is located above the output conveying curtain (38), a net outlet (361) for the single-layer fiber net (4) to fall is formed in the laying carriage (36), and the laying carriage (36) can stack the single-layer fiber net (4) on the output conveying curtain (38).

2. The post-treatment apparatus according to claim 1, characterized in that the web transfer device (1) comprises a first transfer device (11) and a second transfer device (12), the first transfer device (11) being arranged at the inlet side of the draw machine (2) or the cross lapper (3), the second transfer device (12) being arranged between the draw machine (2) and the cross lapper (3).

3. The post-treatment apparatus according to claim 1, characterized in that said pairs of drawing rollers (24) are provided in a number of at least three groups.

4. Post-treatment apparatus according to claim 1 or 3, characterized in that the rotation speed of each set of said pairs of drawing rollers (24) is different from each other, the rotation speed of the sets of pairs of drawing rollers (24) being gradually increased from near the inlet of the drawing machine (2) to near the outlet of the drawing machine (2).

5. An aftertreatment apparatus according to claim 1, characterized in that a press roll (312) is arranged above the first web laying curtain (32), the press roll (312) being rotated on the web laying frame (31), an internal entrance of the web laying frame (31) for the entry of a single-layer web (4) being arranged between the press roll (312) and the first web laying curtain (32).

6. The aftertreatment apparatus according to claim 1, wherein the deflection roller set (37) comprises two sets of deflection rollers, wherein one set of deflection rollers is arranged inside the first web laying curtain (32) for deflecting the first web laying curtain (32) and the other set of deflection rollers is arranged inside the second web laying curtain (33) for deflecting the second web laying curtain (33).

7. The aftertreatment apparatus of claim 6, wherein the two sets of deflection rollers are distributed at the same location.

8. The post-treatment apparatus according to claim 1, characterized in that the direction of movement of the spreading frame (31) is perpendicular to the falling direction of the single-layer web (4).

9. The post-treatment apparatus according to claim 1 or 8, characterized in that the direction of the reciprocal movement of the lapping frame (31) is perpendicular to the direction of movement of the output conveyor curtain (38).

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