CN115571720B

CN115571720B - Production process and production system for thermoplastic carbon fiber chopped product

Info

Publication number: CN115571720B
Application number: CN202211571848.0A
Authority: CN
Inventors: 谈昆伦; 谈源; 王志刚; 耿波; 陈香伟; 吴超; 徐峰; 张子宁; 蒋宽玉
Original assignee: Newtech Group Co Ltd
Current assignee: Newtech Group Co Ltd
Priority date: 2022-12-08
Filing date: 2022-12-08
Publication date: 2023-03-10
Anticipated expiration: 2042-12-08
Also published as: CN115571720A

Abstract

The invention relates to the technical field of carbon fiber processing, in particular to a production process and a production system of a thermoplastic carbon fiber chopped product. The production process comprises the following steps of S10: gathering a plurality of waste filaments generated on a carbon fiber production line into a waste filament bundle, winding the waste filament bundle onto a first winding drum, and arranging isolation paper between two adjacent layers of waste filament bundles on the first winding drum; s20: unwinding the first winding drum wound with the waste silk tows, splitting the waste silk tows into a plurality of waste silk, and winding the plurality of waste silk onto a plurality of second winding drums respectively; s30: unwinding a plurality of second winding drums wound with waste wires, and simultaneously cutting a plurality of waste wires unwound from the second winding drums to form a plurality of wire sections; s40: the thermoplastic resin is coated on the surface of the filament segments to finally form the thermoplastic carbon fiber chopped product. The production system comprises large-roll-diameter winding and unwinding equipment, single winding equipment, cutting equipment and sizing equipment. The invention can effectively improve the production efficiency of the thermoplastic carbon fiber chopped product and ensure the product quality.

Description

Production process and production system for thermoplastic carbon fiber chopped product

Technical Field

The invention relates to the technical field of carbon fiber processing, in particular to a production process and a production system of a thermoplastic carbon fiber chopped product.

Background

In the production process of carbon fiber yarns, due to various reasons such as poor processing of some yarns, the yarns cannot meet the high quality requirement of carbon fiber fabrics, and finally become waste yarns. However, these waste filaments may be used as other products, and these carbon fiber waste filaments are usually processed to produce a thermoplastic carbon fiber chopped product for customers, specifically, as shown in fig. 1, the carbon fiber waste filaments (left part in the figure) produced from the carbon filament production line are recovered, and then cut into filament segments of fixed length, and then thermoplastic resin is coated on the surface of each filament segment, thereby forming the thermoplastic carbon fiber chopped product (right part in the figure).

In the prior art, carbon fiber waste silk produced in a carbon silk production line is usually placed in a messy accumulation mode, and in the process of collecting the messy waste silk, the waste silk is easy to be intertwined and knotted, so that a person is required to manually smooth the waste silk, the messy waste silk is divided into single pieces, and then the waste silk is cut into silk sections with fixed lengths. It can be seen that in the prior art, a large amount of labor and time are needed for processing the carbon fiber waste filaments, the production efficiency is seriously affected, the production cost is increased, and in the filament stroking and rewinding processes, the waste filaments are dragged on the ground, so that the waste filaments are easily polluted, and the quality of the final thermoplastic carbon fiber chopped product is seriously affected.

Therefore, a system or a process for producing chopped thermoplastic carbon fiber products with higher production efficiency and better product quality is needed.

Disclosure of Invention

The invention provides a production process of a thermoplastic carbon fiber chopped product, which can effectively solve the problems in the background art, effectively improve the production efficiency of the thermoplastic carbon fiber chopped product and ensure the product quality. The invention also provides a production system of the thermoplastic carbon fiber chopped product, which can achieve the same technical effect.

The invention provides a production process of a thermoplastic carbon fiber chopped product, which is characterized by comprising the following steps of:

s10: gathering a plurality of waste filaments generated on a carbon fiber production line into a waste filament bundle, winding the waste filament bundle onto a first winding drum, and arranging isolation paper between two adjacent layers of waste filament bundles on the first winding drum;

s20: unwinding a first winding drum wound with waste silk tows, splitting the waste silk tows into a plurality of waste silk, and respectively winding the plurality of waste silk onto a plurality of second winding drums to enable each second winding drum to only wind one waste silk;

s30: unwinding a plurality of second winding drums wound with waste wires, and simultaneously cutting a plurality of waste wires unwound from the second winding drums to form a plurality of wire sections;

s40: the surface of the filament segments is coated with a thermoplastic resin to ultimately form a thermoplastic carbon fiber chopped product.

The invention also provides a production system of the thermoplastic carbon fiber chopped product, which is suitable for the production process of the thermoplastic carbon fiber chopped product and comprises the following steps:

the large-winding-diameter winding and unwinding equipment is used for winding and unwinding a first winding drum and comprises a first driving roller and a first driven roller; the first driving roller is used for mounting a first reel and is driven by a first motor to rotate; the first driven roller is used for installing an isolation paper reel and can rotate freely;

the single winding device is used for winding the second winding drum and comprises a second driving roller, and the second driving roller is used for mounting the second winding drum and is driven by a second motor to rotate;

the cutting equipment is provided with a plurality of second driven rollers, a pulling structure and a cutting structure; the second driven roller is used for mounting a second winding drum and can rotate freely; the pulling structure is used for driving a plurality of waste wires to move simultaneously; the cutting structure is used for cutting a plurality of waste silks simultaneously;

and the sizing equipment is provided with a permeation groove with an upward opening and used for placing the filament sections and the thermoplastic resin.

Furthermore, the large-roll-diameter winding and unwinding device further comprises two rotating assemblies which are respectively used for mounting the first driving roller and the first driven roller; each rotating assembly comprises two safety chucks symmetrically arranged on the rack; in the two rotating assemblies, clamping shafts in the safety chucks are respectively clamped with the end parts of the corresponding first driving rollers or the corresponding first driven rollers; the first motor is used for driving a clamping shaft of the safety chuck connected with the first driving roller to rotate.

Furthermore, the large-winding-diameter winding and unwinding device further comprises two jacking structures which are respectively arranged below two ends of the first driving roller; each jacking structure comprises a jacking block moving along the vertical direction.

Furthermore, the large-roll-diameter winding and unwinding equipment further comprises a resistance structure; the resistance structure comprises a belt and a spring; one end of the belt is fixedly arranged, and the middle section of the belt is wrapped around the side face of the clamping shaft of the safety chuck connected with the first driven roller; one end of the spring is fixedly arranged, and the other end of the spring is connected with the other end of the belt.

Furthermore, the resistance structure also comprises an adjusting seat, an adjusting nut and an adjusting bolt; the adjusting seat is fixedly arranged; the adjusting seat is provided with an adjusting hole; the adjusting nut is sleeved on the adjusting bolt; the adjusting bolt penetrates through the adjusting hole and is connected with one end of the spring, and the adjusting nut abuts against the adjusting seat.

Further, the single winding device also comprises a micro-tension structure; the micro-tension structure comprises two tension plates, and the interval between the two tension plates is gradually reduced along the direction towards the second driving roller.

Further, the sizing equipment also comprises an extrusion plate and a slurry collecting groove; the extrusion plate is arranged above the permeation groove and is driven by the cylinder to move along the vertical direction; a plurality of overflow ports are arranged on the side surface of the infiltration tank; the slurry collecting groove is arranged below the permeation groove.

Further, the sizing device also comprises a connecting part; the connecting part is provided with an inclined mounting groove, and the top end of the connecting part is connected with the action end of the cylinder; the connecting part and the extrusion plate are connected through a fastener penetrating through the mounting groove.

Further, the sizing device also comprises two cross beams and a mounting plate; the two cross beams are arranged at intervals; two ends of the mounting plate are respectively mounted on the two cross beams, and the middle section of the mounting plate is bent downwards; the cylinder is installed the interlude of mounting panel.

Through the technical scheme of the invention, the following technical effects can be realized:

1. waste silk produced on a production line is directly wound on a first winding drum together, and layers of the waste silk are separated from one another by using isolation paper, so that the problems of winding and knotting of the waste silk are avoided; meanwhile, the mode of rolling together enables personnel to quickly process waste silk from the production line of the carbon fiber silk thread, and can avoid influencing the efficiency and space of the production line of the carbon fiber silk thread as much as possible;

2. through breaking into single with many waste silks earlier, then with every waste silk rolling to second reel, just can cut after the tip of all waste silks aligns when cutting again, guarantee can not produce winding, friction between each waste silk, and then guarantee the accuracy of the length size of the silk thread section of cutting out.

3. The production process has the advantages that the waste silk can be prevented from falling on the ground in all steps, and the waste silk can be kept in a rolling state as far as possible before the short cut product is formed, so that the waste silk is prevented from being polluted by falling ash, and the quality of the short cut product is effectively guaranteed.

Drawings

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

FIG. 1 is a schematic representation of a waste to chopped product of the background of the invention;

FIG. 2 is a flow chart of a process for producing a chopped thermoplastic carbon fiber product of the present invention;

FIG. 3 is a schematic view of step S10 of the thermoplastic carbon fiber chopped product production process of the present invention;

FIG. 4 is a schematic view of step S20 of the thermoplastic carbon fiber chopped product production process of the present invention;

FIG. 5 is a schematic view of steps S30 and S40 of the thermoplastic carbon fiber chopped product production process of the present invention;

fig. 6 is a schematic perspective view of the large-roll-diameter winding and unwinding device of the present invention;

FIG. 7 is an enlarged view at A of FIG. 6;

FIG. 8 is an enlarged view of FIG. 6 at B;

fig. 9 is a front view of the large-roll-diameter winding and unwinding device of the present invention;

fig. 10 is a side sectional view of the large-winding-diameter winding and unwinding device of the present invention;

FIG. 11 is an enlarged view at C of FIG. 10;

FIG. 12 is a perspective view of a prior art safety chuck;

FIG. 13 is a schematic perspective view of a single take-up apparatus of the present invention;

FIG. 14 is an enlarged view at D of FIG. 13;

FIG. 15 is an enlarged view at E of FIG. 13;

FIG. 16 is a side view of the cutting apparatus of the present invention;

FIG. 17 is a schematic perspective view of a sizing apparatus of the present invention;

FIG. 18 is a front view of the sizing apparatus of the present invention;

FIG. 19 is an enlarged view at F of FIG. 18;

FIG. 20 is a side view of the sizing apparatus of the present invention;

FIG. 21 is an enlarged view at G of FIG. 20;

reference numerals: 01. a first reel; 02. a second reel; 03. a release paper roll; 04. a finished product winding drum winding mechanism; 1. large-roll-diameter winding and unwinding equipment; 11. a first drive roll; 12. a first driven roller; 13. a safety chuck; 13a, a base; 13b, a clamping shaft; 13c, a chuck; 14. a jacking structure; 14a, a jacking block; 14b, a first extension section; 14c, a second extension segment; 15. a resistance structure; 15a, a belt; 15b, a spring; 15c, an adjusting seat; 15d, adjusting the nut; 15e, adjusting bolts; 16. a first motor; 17. a wire collecting frame; 2. a single winding device; 21. a second drive roll; 22. a micro-tension structure; 22a, a tension plate; 23. a second motor; 24. a wire fixing hole; 25. an adjustment column; 26. a moving block; 3. a cutting device; 31. a second driven roller; 32. a pulling structure; 33. cutting the structure; 4. sizing equipment; 41. a permeation groove; 41a, an overflow port; 42. a compression plate; 43. a slurry collecting tank; 44. a connecting portion; 44a, a mounting groove; 45. a cross beam; 46. mounting a plate; 47. and a cylinder.

Detailed Description

The technical solutions in the embodiments of the present invention will be 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 only a part of the embodiments of the present invention, and not all of the embodiments.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like are based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; either directly or indirectly through intervening media, or may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention relates to a production process of a thermoplastic carbon fiber chopped product, which comprises the following steps of:

s10: gathering a plurality of waste filaments generated on a carbon fiber production line into a waste filament bundle, winding the waste filament bundle onto a first winding drum 01, and arranging isolation paper between two adjacent layers of waste filament bundles on the first winding drum 01;

s20: unwinding the first winding drum 01 wound with the waste silk tows, splitting the waste silk tows into a plurality of waste silk, respectively winding the waste silk onto a plurality of second winding drums 02, and enabling each second winding drum 02 to only wind one waste silk;

s30: unwinding a plurality of second winding drums 02 wound with waste wires, and simultaneously cutting a plurality of waste wires unwound from the second winding drums 02 to form a plurality of wire sections;

s40: the thermoplastic resin is coated on the surface of the filament segments to finally form the thermoplastic carbon fiber chopped product.

Specifically, the tail end of the carbon fiber yarn production line is as shown in fig. 3, and qualified carbon fiber yarn products are directly wound by the finished product winding drum winding mechanism 04, so that each qualified carbon fiber yarn is wound on a corresponding finished product winding drum. For the waste silk produced in the production line, the production process firstly gathers the waste silk produced on the production line into a waste silk tow through the step S10 and then directly winds the waste silk tow together onto the first winding drum 01, so that the problems of winding and knotting among the waste silk due to accumulation treatment of the waste silk in the prior art are avoided, the waste silk is prevented from falling on the ground or a table board, and the waste silk is effectively prevented from being polluted; meanwhile, the mode of rolling together can be realized through one device, so that personnel can quickly process waste silk from the production line of the carbon fiber silk thread, and the influence on the efficiency and the space of the production line of the carbon fiber silk thread can be avoided as much as possible. When the silk waste winding, if produce the winding between each layer of silk waste, will drag the silk waste of lower floor when unreeling, lead to the mutual friction between the silk waste to influence silk thread quality, set up and probably lead to disconnected silk because the strength of dragging is too big, step S10 uses barrier paper to separate each other between silk waste layer and the layer, avoids mutual adhesion between the silk waste, also can avoid producing the winding each other between each layer of silk waste, guarantees that the silk waste can unreel one deck ground when subsequent unreeling.

Although the layers of the waste wires can be separated by the separating paper in step S10, the waste wires in the same layer may be entangled, and because a person needs to quickly operate the cutting line, in this case, the ends of the wound waste wires are not necessarily aligned, if the first reel 01 is directly unreeled for cutting, the waste wires may not be straightened due to the entanglement, and the length of the waste wires measured and the actual length of the waste wires are deviated, and the deviation amount of each waste wire is different, and finally the length of the cut wire section is greatly deviated from the required length, so that as shown in fig. 4, the waste wires are firstly separated into a single piece by step S20, and then each waste wire is reeled to the second reel 02, in the following step S30, as shown in fig. 5, the ends of the waste wires can be drawn out of the second reel 02, the ends of all the waste wires are aligned and cut simultaneously, and preferably, all the waste wires are horizontally arranged in a word, and the cutting length between adjacent waste wires is ensured, and the cutting size is not accurately formed.

Steps S10 to S40 may be performed independently for a plurality of times, and then the subsequent steps are performed, that is: for the step S10, after the plurality of waste filaments are wound into the first bobbin 01, the first bobbin 01 wound with the waste filaments may be stored first, and the step S20 is performed after the plurality of first bobbins 01 are stored, so as to avoid affecting a main production line of the carbon fiber yarn; similarly, after all the waste wires on the first winding drum 01 are wound on the second winding drum 02, the cutting operation in the step S30 may be executed; similarly, all the waste filaments on the second reel 02 may be cut into filament sections, and then the sizing operation of step S40 may be performed. The operation mode can avoid frequent switching of the operation equipment by personnel, and the processing efficiency of the production process is improved to the maximum extent.

The invention also relates to a production system of the thermoplastic carbon fiber chopped product, which is suitable for the production process of the thermoplastic carbon fiber chopped product and comprises a large-roll-diameter winding and unwinding device 1, a single winding device 2, a cutting device 3 and a sizing device 4.

The large-winding-diameter winding and unwinding device 1 is suitable for steps S10 and S20 in a production process, and is used for winding the first winding drum 01 in step S10 as shown in fig. 3, and is used for unwinding the first winding drum 01 in step S20 as shown in fig. 4. The large-winding-diameter winding and unwinding equipment 1 comprises a first driving roller 11 and a first driven roller 12; the first driving roller 11 is used for mounting the first reel 01 and is driven to rotate by a first motor 16; the first driven roller 12 is used for mounting the release paper roll 03 and is freely rotatable. In the winding operation of step S10, as shown in fig. 3, an empty first roll 01 is fitted around a first driving roller 11, and an isolation paper roll 03 with an isolation paper roll is fitted around a first driven roller 12; a plurality of waste threads generated by a carbon fiber silk thread production line and the isolation paper led out from the isolation paper winding drum 03 are pre-wound in a first winding drum 01 for several circles, and then the first motor 16 is started to drive the first driving roller 11 to rotate, so that winding can be completed.

The single winding device 2 is applicable to step S20 in the production process, as shown in fig. 4, and is configured to wind the second winding drum 02, and includes a second driving roller 21, where the second driving roller 21 is used to mount the second winding drum 02 and is driven by a second motor 23 to rotate. In step S20, the first motor 16 in the large winding and unwinding device 1 rotates reversely to drive the first driving roller 11 to rotate reversely to realize unwinding, and meanwhile, the second motor 23 of the single winding and unwinding device 2 drives the empty second driving roller 21 to realize winding of the waste silk by the second winding drum 02. The quantity of single rolling equipment 2 sets up according to the radical of waste silk, makes every waste silk all carry out the rolling through a single rolling equipment 2 alone.

The cutting apparatus 3, adapted to step S30 in the production process, as shown in fig. 5 and 16, is provided with a plurality of second driven rollers 31, a pulling structure 32, and a cutting structure 33; the second driven roller 31 is used for installing the second winding drum 02 wound with waste silk and can rotate freely; the pulling structure 32 is used for driving a plurality of waste wires to move simultaneously, and is provided with a clamping structure capable of clamping the waste wires and a power structure for driving the clamping structure to move along the horizontal direction; the cutting structure 33 is used for simultaneously cutting a plurality of waste wires and is provided with a cutter capable of moving up and down; when cutting the waste silk, the clamping structure of pulling structure 32 cliies the waste silk earlier, and later power structure drives the clamping structure and removes, makes the waste silk follow the clamping structure and removes the certain distance to make the waste silk pass the cut-off knife below of cutting structure 33, later the cut-off knife action cuts off the waste silk, and the clamping structure loosens the waste silk, and power structure drives the clamping structure again and resets and continues the subsequent waste silk of centre gripping, and pulling structure 32 and cutting structure 33 are prior art, and its concrete mechanism and theory of operation do not need to be repeated here.

The sizing apparatus 4, which is adapted to step S40 in the production process, is provided with an upwardly open penetration groove 41 for placing the filament sections and the thermoplastic resin, as shown in fig. 5. The cut filament sections can be conveyed into the permeation tank 41 in a manual carrying or conveying belt mode, and then thermoplastic resin is injected into the permeation tank 41 to achieve sizing of the filament sections, and finally the chopped products are obtained.

The further specific structure of the large-winding-diameter winding and unwinding device 1 is as follows: as shown in fig. 6 to 11, the large-winding-diameter winding and unwinding device 1 further includes two rotating assemblies, which are respectively used for installing a first driving roller 11 and a first driven roller 12; each rotating assembly comprises two safety chucks 13 symmetrically arranged on the frame, as shown in fig. 12, each safety chuck 13 is provided with a base 13a, a chuck shaft 13b and a chuck 13c; the base 13a is fixedly arranged on a rack of the large-roll-diameter winding and unwinding equipment 1; the clamping shaft 13b rotates on the base 13a, the end part of the clamping shaft is provided with a clamping groove, and the top of the clamping groove is provided with an opening; the chuck 13c is rotatable on the chuck shaft 13b and can close or open the opening at the top of the card slot by rotation; clamping parts with rectangular sections are arranged at the end parts of the first driving roller 11 and the first driven roller 12, and in the two rotating assemblies, clamping grooves of clamping shafts 13b in the safety chuck 13 are respectively clamped with the clamping parts at the end parts of the corresponding first driving roller 11 or the first driven roller 12, so that the first driving roller 11 or the first driven roller 12 can rotate along with the corresponding clamping shafts 13 b; the specific principle and structure of the safety chuck 13 are the prior art, and are not described herein; the first motor 16 is used to rotate a chuck shaft of a safety chuck 13 connected to the first drive roll 11. In the use, through the chuck 13c that rotates safety chuck 13, open or the shutoff with the opening of draw-in groove, just can realize the quick installation and the dismantlement of first drive roller 11 and first driven roller 12, thereby convenient to use person changes first reel 01 and barrier paper reel 03 fast, and can also set up first drive roller 11 and first driven roller 12 a plurality ofly, adorn it on first reel 01 and barrier paper reel 03 of difference, can directly change together with first reel 01 and barrier paper reel 03 at the change in-process, thereby minimize the down time of large roll diameter winding and unwinding equipment 1, effectively promote change efficiency, minimize and influence main production line ground of carbon fiber silk thread.

The large-roll-diameter winding and unwinding device 1 further comprises two jacking structures 14 which are respectively arranged below two ends of the first driving roll 11; each jacking structure 14 comprises a jacking block 14a moving in a vertical direction; after the safety chuck 13 is opened, the jacking block 14a of the jacking structure 14 moves upwards to push the clamping part of the first driving roller 11 out of the clamping groove of the clamping shaft 13b, so that the personnel can conveniently perform subsequent replacement. Preferably, a first extension 14b and a second extension 14c are provided at the top of the jacking block, as shown; the first extension section 14b extends upwards and is arranged on one side of the top of the jacking block close to the inside of the rack, so that the driving roller can be prevented from sliding towards the inside of the rack; the second extension section 14c extends horizontally towards the outside of the frame, so that personnel can push the driving roller to the outside of the frame along the second extension section 14c, and the driving roller can be conveniently taken and placed.

The large-winding-diameter winding and unwinding equipment 1 further comprises a resistance structure 15; the resistance structure 15 includes a belt 15a and a spring 15b; one end of a belt 15a is fixedly arranged on a rack of the large-winding-diameter winding and unwinding equipment 1, and the middle section of the belt 15a is wound on the side surface of a clamping shaft of a safety chuck 13 connected with the first driven roller 12; spring 15b one end fixed mounting is in the frame of big roll footpath winding and unwinding equipment 1, the other end fixed connection of the spring 15b other end and belt 15a, through the taut belt 15a of spring 15b, the interlude that makes belt 15a compresses tightly the card axle 13b side of safety chuck 13, thereby produce the friction and form the resistance, and then make the rotation of first driven roller 12 form the resistance, consequently just can make the barrier paper tighten at the in-process by the rolling of first reel 01, thereby guarantee the rolling effect of waste silk and barrier paper.

The resistance structure 15 is preferably further provided with an adjusting seat 15c, an adjusting nut 15d and an adjusting bolt 15e; the adjusting seat 15c is fixedly arranged on a rack of the large-roll-diameter winding and unwinding equipment 1; the adjusting seat 15c is provided with an adjusting hole; the adjusting nut 15d is sleeved on the adjusting bolt 15e; the adjusting bolt 15e passes through the adjusting hole and is connected with one end of the spring 15b, and the adjusting nut 15d abuts against the adjusting seat 15c. Adjust adjusting nut 15d position on adjusting bolt 15e through rotating adjusting nut 15d to can control adjusting bolt 15e and stretch out the length of regulation hole, and then the elasticity degree of adjustment spring, finally can adjust the resistance size that belt 15a produced to chuck shaft 13b, thereby make this big roll diameter receive unwinding equipment 1 can adapt to multiple rolling demand.

The large-roll-diameter winding and unwinding equipment 1 further comprises a wire collecting frame 17, and the wire collecting frame slides on a rack of the large-roll-diameter winding and unwinding equipment 1 along the axial direction of the first driving roller 11; the wire collecting frame 17 comprises a plurality of wire guide columns which are parallel to each other, each waste wire is wrapped around one wire guide column, and each waste wire is separated through the wire guide columns, so that the waste wires are prevented from being wound around each other. During the winding process of the first winding drum 01, the line concentration frame 17 slides back and forth in the axial direction of the first driving roller 11, so that the waste silk can be uniformly distributed in the axial direction of the first winding drum 01.

The bottom of the rack of the large-roll-diameter winding and unwinding equipment 1 can be provided with a plurality of rollers with brakes, so that the large-roll-diameter winding and unwinding equipment 1 can be moved conveniently.

A further specific structure of the single winding device 2 is as follows: as shown in fig. 13-15, further comprising a micro-tension structure 22; the micro-tension structure 22 includes two tension plates 22a, and an interval between the two tension plates 22a is gradually decreased in a direction toward the second drive roller 21. The closely spaced sides of the two tension plates 22a provide a clamping force on the waste wire, thereby allowing the waste wire to be tightened and wound onto the second spool 02 more tightly. Preferably, both sides of the interval of two tension plates 22a are provided with a wire-fixing hole 24, and the waste silk passes through the wire-fixing hole 24, so that the waste silk is prevented from being separated from the clamping of the two tension plates 22a to cause the waste silk to be not tightened to influence the rolling effect.

The single winding device 2 further comprises two adjusting columns 25 arranged on the rack of the single winding device 2, and the two tension plates 22a are fixedly arranged on the two adjusting columns 25 respectively; the rack is provided with an installation plate body, the bottom end of each adjusting column 25 penetrates through the installation plate body, fastening nuts are selected from the parts penetrating through the installation plate body, the adjusting columns 25 can rotate by loosening the fastening nuts, so that the clamping force of the two tension plates 22a to waste wires is adjusted, the angle of the adjusting columns 25 is fixed by screwing the fastening nuts after the adjustment is finished, and the clamping force is kept.

The single rolling device 2 further comprises a moving block 26 which slides on the rack of the single rolling device 2 along the axial direction of the second driving roller 21; the moving block 26 includes a through hole for the waste silk to pass through, and during the winding process of the second winding drum 02, the moving block 26 can slide in the axial direction of the second driving roller 21 in a reciprocating manner, so that the waste silk can be uniformly distributed in the axial direction of the second winding drum 02.

A further specific construction for the sizing device 4 is as follows: as shown in fig. 17-21, the sizing apparatus 4 further includes a pressing plate 42 and a collecting chute 43; the extrusion plate 42 is arranged above the permeation groove 41 and is driven by the air cylinder 47 to move along the vertical direction; a plurality of overflow ports 41a are arranged on the side surface of the infiltration tank 41; the slurry collection tank 43 is disposed below the infiltration tank 41. Specifically, a plurality of filament sections are horizontally arranged in a permeation groove 41, then slurry is injected into the permeation groove 41, after the filament sections are completely wrapped by the slurry and permeated, an extrusion plate 42 moves downwards to extend into the permeation groove 41 and extrude the filament sections at the bottom, redundant slurry on the surfaces of the filament sections flows out of the permeation groove 41 through an overflow port 41a, the flowed slurry falls into a slurry collecting groove 43 below the permeation groove 41, and the slurry in the slurry collecting groove 43 can be re-injected into the permeation groove 41 through a circulating pump in the subsequent filament sections, so that the recycling of the redundant slurry is realized; the squeeze plate 42 is then moved upward, moving the squeeze plate 42 out of the permeate tank 41, and the finished sized strand is removed.

Preferably, the two cylinders 47 driving the extrusion plate 42 are arranged in two, the two cylinders 47 are symmetrically arranged at two ends of the extrusion plate 42, and the air ports of the two cylinders 47 are connected to the same air source pressure regulating valve, so that the two cylinders 47 can synchronously extend and retract, and then the two ends of the extrusion plate 42 are driven to synchronously move, so that the extrusion plate 42 can be kept horizontally pressed, and the uniformity of extrusion of the extrusion plate 42 on each part of the filament section is ensured.

The frame bottom of starching equipment 4 preferably is provided with a plurality of adjustment feet, and adjustment foot top screw thread screw in frame bottom surface, adjustment foot distribute in four angles and the marginal midpoint department of frame bottom surface, just can adjust the height of frame corresponding part through the screw in degree of depth of adjusting the adjustment foot to can adjust the infiltration groove 41 of installing on the mount to the level. The bottom of the slurry collecting tank 43 is preferably provided with a plurality of universal wheels so that the slurry collecting tank 43 can be more conveniently drawn out of or pushed into the bottom of the infiltration tank 41.

The sizing apparatus 4 further comprises a connection portion 44; the connecting part 44 is provided with an inclined mounting groove 44a, and the top end of the connecting part 44 is connected with the action end of the cylinder 47; the connection portion 44 and the pressing plate 42 are connected by a fastener passing through the mounting groove 44 a. The inclined mounting groove 44a is arranged to enable the height of the fastener to be adjusted, so that the height of the end of the extrusion plate 42 is adjustable, and the extrusion plate 42 can be kept horizontal by adjusting the heights of the two ends of the extrusion plate 42; meanwhile, as the extrusion plate 42 needs to apply force to extrude the wire section, if the installation groove 44a is vertical, the fastener is easy to slide to cause the end part of the extrusion plate 42 to move, and therefore, the inclined installation groove 44a is adopted, so that the side wall of the installation groove 44a can support the fastener, and the movement of the fastener is avoided as much as possible. It is preferable that the inner portion of the connection portion 44 is configured as a cavity structure so that the connection portion 44 can be slightly deformed, and the compression plate 42 can be cushioned by the slight deformation.

The frame part of the sizing apparatus 4 further comprises two cross beams 45 and a mounting plate 46; the two cross beams 45 are arranged at intervals; two ends of the mounting plate 46 are respectively mounted on the two cross beams 45, and the middle section of the mounting plate 46 is bent downwards; the cylinder 47 is mounted in the middle section of the mounting plate 46. The mounting plate 46 with the middle section bent downwards can also generate certain deformation, and when the pushing force of the air cylinder 47 is too large or the flowing speed of the slurry is too slow, the middle section of the mounting plate 46 can generate slight deformation upwards to avoid the excessive downward pressure of the extrusion plate 42.

In order to ensure the squeezing effect of the squeezing plate 42 on the slurry, it is preferable to provide an extension extending vertically upward at the edge of the squeezing plate 42. If there is no extension, the slurry is easy to flow from the edge to the upper part of the extrusion plate 42 during the extrusion of the extrusion plate 42, and after the extrusion plate 42 rises, the slurry above the extrusion plate 42 flows back to the filament again, resulting in poor extrusion effect of the extrusion plate 42; and through setting up the extension, make the edge of stripper plate 42 and the area of contact of infiltration groove 41 inner wall side increase, the thick liquid is difficult to flow upwards from the edge of stripper plate 42, but can only outwards flow from overflow mouth 41a to can guarantee the crowded thick liquid effect of stripper plate 42.

The foregoing shows and describes the general principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A production process of a thermoplastic carbon fiber chopped product is characterized by comprising the following steps:

2. A thermoplastic carbon fiber chopped product production system suitable for the thermoplastic carbon fiber chopped product production process of claim 1, comprising:

the large-winding-diameter winding and unwinding device (1) is used for winding and unwinding a first winding drum and comprises a first driving roller (11) and a first driven roller (12); the first driving roller (11) is used for mounting a first reel and is driven by a first motor to rotate; the first driven roller (12) is used for mounting a release paper reel and can rotate freely;

the single winding device (2) is used for winding a second winding drum and comprises a second driving roller (21), and the second driving roller (21) is used for installing the second winding drum and is driven by a second motor to rotate;

a cutting device (3) provided with a plurality of second driven rollers (31), a pulling structure (32) and a cutting structure (33); the second driven roller (31) is used for mounting a second winding drum and can rotate freely; the pulling structure (32) is used for driving a plurality of waste wires to move simultaneously; the cutting structure (33) is used for cutting a plurality of waste silks simultaneously;

the sizing device (4) is provided with a permeation groove (41) which is opened upwards and is used for placing the filament sections and the thermoplastic resin.

3. The chopped product production system of the thermoplastic carbon fiber according to claim 2, wherein said large-winding-diameter winding and unwinding device (1) further comprises two rotating assemblies for mounting said first driving roller (11) and said first driven roller (12), respectively; each rotating assembly comprises two safety chucks (13) symmetrically arranged on the rack; in the two rotating assemblies, clamping shafts in the safety chucks (13) are respectively clamped with the end parts of the corresponding first driving roller (11) or the corresponding first driven roller (12); the first motor is used for driving a clamping shaft of the safety chuck (13) connected with the first driving roller (11) to rotate.

4. The chopped product production system of the thermoplastic carbon fiber according to claim 3, wherein the large-roll-diameter winding and unwinding device (1) further comprises two jacking structures (14) respectively arranged below two ends of the first driving roller (11); each jacking structure (14) comprises a jacking block (14 a) moving along the vertical direction.

5. The system for producing chopped thermoplastic carbon fiber products according to claim 3, wherein said large-roll-diameter winding and unwinding device (1) further comprises a resistance structure (15); the resistance structure (15) comprises a belt (15 a) and a spring (15 b); one end of the belt (15 a) is fixedly arranged, and the middle section of the belt (15 a) is wound around the side surface of the clamping shaft of the safety chuck (13) connected with the first driven roller (12); one end of the spring (15 b) is fixedly arranged, and the other end of the spring (15 b) is connected with the other end of the belt (15 a).

6. The thermoplastic carbon fiber chopped product production system of claim 5, wherein said resistance structure (15) further comprises an adjustment seat (15 c), an adjustment nut (15 d) and an adjustment bolt (15 e); the adjusting seat (15 c) is fixedly arranged; the adjusting seat (15 c) is provided with an adjusting hole; the adjusting nut (15 d) is sleeved on the adjusting bolt (15 e); the adjusting bolt (15 e) penetrates through the adjusting hole and is connected with one end of the spring (15 b), and the adjusting nut (15 d) abuts against the adjusting seat (15 c).

7. The system for producing chopped thermoplastic carbon fiber products according to claim 2, wherein said single take-up device (2) further comprises a micro-tensioning structure (22); the micro-tension structure (22) comprises two tension plates (22 a), and the interval between the two tension plates (22 a) is gradually reduced along the direction towards the second driving roller (21).

8. The system for producing chopped thermoplastic carbon fiber products according to claim 2, wherein said sizing apparatus (4) further comprises a pressing plate (42) and a collecting trough (43); the extrusion plate (42) is arranged above the permeation groove (41) and is driven by an air cylinder to move along the vertical direction; a plurality of overflow ports (41 a) are arranged on the side surface of the infiltration groove (41); the slurry collecting groove (43) is arranged below the permeation groove (41).

9. The thermoplastic carbon fiber chopped product production system of claim 8, wherein said sizing apparatus (4) further includes a connecting portion (44); an inclined mounting groove (44 a) is formed in the connecting part (44), and the top end of the connecting part (44) is connected with the action end of the air cylinder; the connection part (44) and the compression plate (42) are connected by a fastener passing through the mounting groove (44 a).

10. The system for producing chopped thermoplastic carbon fiber products according to claim 8, wherein said sizing apparatus (4) further comprises two cross-beams (45) and a mounting plate (46); the two cross beams (45) are arranged at intervals; two ends of the mounting plate (46) are respectively mounted on the two cross beams (45), and the middle section of the mounting plate (46) bends downwards; the cylinder is mounted in the middle section of the mounting plate (46).