CN107447370B - A kind of device and method that chopped strand is continuously orientated - Google Patents
A kind of device and method that chopped strand is continuously orientated Download PDFInfo
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- CN107447370B CN107447370B CN201710833450.2A CN201710833450A CN107447370B CN 107447370 B CN107447370 B CN 107447370B CN 201710833450 A CN201710833450 A CN 201710833450A CN 107447370 B CN107447370 B CN 107447370B
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- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/74—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being orientated, e.g. in parallel (anisotropic fleeces)
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Abstract
The present invention provides a kind of devices that chopped strand is continuously orientated, and are made of stock unit, aligning device and separative unit；Stock unit is used to be stirred the complex liquid that chopped strand and decentralized medium are formed, and obtains chopped strand suspension and is pumped to aligning device；Aligning device is a helix transporting device being vertically arranged, with the helical blade of screw pitch and helix angle gradual change on the screw rod of helix transporting device, the sleeve of screw rod, helical blade and helix transporting device is fitted close to form tapered helical flow path, screw rod rotation is driven by driving device, the separative unit of lower section is orientated and be delivered to the chopped strand suspension in tapered helical flow path；Separative unit carries out compacting winding after obtaining orientation chopped strand for receiving the chopped strand suspension being orientated and carrying out separating treatment to it.The present invention also provides a kind of methods that chopped strand is continuously orientated.The present invention can improve orientation efficiency, improve orientation quality, and orientation fiber is long, be suitable for industrial application and promote.
Description
Technical field
The present invention relates to chopped strand utilization technology field, what more specifically a kind of chopped strand was continuously orientated
Device and method.
Background technique
The length of chopped strand is generally 3-15cm, the anisotropy with height.Chopped strand reinforced resin base is compound
Material is widely used in aviation boat because of its excellent properties high with intensity, that specific modulus is high, corrosion-resistant and thermal stability is good
It, auto industry, the fields such as Leisure Sport and wind-powered electricity generation.And the performance and chopped strand of chopped strand reinforced resin based composites
The factors such as length, content, interface performance and degree of orientation it is related, wherein the length and degree of orientation of fiber are to influence fiber
Enhance the key factor of composite materials property.In recent years, being widely used with fibre, production and use process in
The fiber scrap of generation also greatly increases, and the fiber that these scraps obtain after processing equally has excellent performance, is
The important sources of chopped strand.However, through handle obtain be usually No yield point chopped strand, fiber made of this fiber
Felt performance is poor, is unfavorable for the renewable resources of recycled fiber.
In recent years, researchers at home and abroad have conducted extensive research chopped strand orientation felt technology of preparing.
V.Timbrell etc. (Journal of Applied Physics, 1972,43 (11), 4839-4840) is carried out fine using magnetic field
Dimension orientation, it is desirable that fiber has magnetic conductivity, limits the type of fiber, fiber orientation degree is low and aligning device is complicated.
Vyakarnam etc. (U.S.Patant 584356) carries out fiber orientation using electric field, and orientation process is similar to magnetic field method, it is desirable that
Fiber has certain electric conductivity, equally limits the type of fiber, fiber orientation degree is low, can not obtain the fibre of high-orientation
Dimension.Kacir etc. (Polymer Engneering&Science, 1975,15 (7), 525-537) utilizes wet laid fiber orientation technology
Glass fibre orientation is carried out, but its preparation is bulk fibers felt, cannot achieve the continuous chopped strand orientation of scale.Chinese invention
Patent (CN105178090B) proposes a kind of preparation method of chopped strand orientation felt, and this method is realized fine using tapered fluid
Dimension orientation, fibre length are up to 12mm, and orientation fibre length is shorter, can not prepare the longer fibers orientation with excellent properties
Felt；Taking forward longer recycled fiber also needs to carry out chopped, increases process, and this method is limited by jet size, out
Expect that efficiency is lower.
As it can be seen that above method the problems such as that there are chopped strand degree of orientations is low, orientation fiber is shorter, also so that recycling
Extensive, the industrialization renewable resources of fiber are hindered.
Summary of the invention
The present invention is directed to solve one of above-mentioned technical problem at least to a certain extent.For this purpose, first mesh of the invention
Be propose a kind of device that chopped strand is continuously orientated, to can improve orientation efficiency, improve orientation quality, be orientated fiber
It is long, it is suitable for industrial application and promotes.
It is another object of the present invention to propose a kind of method that chopped strand is continuously orientated.
To achieve the above object, the present invention adopts the following technical scheme:
A kind of device that chopped strand is continuously orientated, is made of stock unit, aligning device and separative unit；
The stock unit is used to be stirred the complex liquid that chopped strand and decentralized medium are formed, and obtains chopped strand
Suspension is simultaneously pumped to aligning device；
The aligning device is a helix transporting device being vertically arranged, have on the screw rod of the helix transporting device screw pitch with
The sleeve of the helical blade of helix angle gradual change, the screw rod, helical blade and the helix transporting device is fitted close to be formed
Tapered helical flow path drives the screw rod to rotate, to the chopped strand flowed through in the tapered helical flow path by driving device
Suspension is orientated, and is delivered to the separative unit of lower section；
The separative unit is orientated for receiving the chopped strand suspension being orientated and carrying out separating treatment to it
Compacting winding is carried out after chopped strand.
Preferably, pass through helical form between the discharge port of the helix transporting device and the lower end of the tapered helical flow path
Pipeline is connected, and forms snail shape runner with the spiral pipe.
Preferably, the shape that the discharge port is arranged is that taper be flat to cylindrical smoothly along chopped strand suspension flow
The structure of flat shape.
Preferably: the screw pitch and helix angle of the helical blade of the helix transporting device are along chopped strand suspension
Flow direction is successively decreased.
Preferably, the stock unit is to be connected and composed by stirred tank and liquid storage tank by pipeline, is set on the liquid storage tank
There is ultrasonic generator, the bubble in liquid storage tank in chopped strand suspension is removed by the ultrasonic generator；
Motor-mount pump is equipped between the aligning device and the stock unit, by the motor-mount pump by the chopped strand
Suspension is pumped into the helix transporting device through diversion pipe；
The separative unit is by conveyer belt, bellows, drying box, roller wheel and rolling-up mechanism at the conveyer belt is
Mesh structure with intensive mesh obtains the chopped fibre being orientated for receiving, filtering the chopped strand suspension being orientated
Dimension, and it is sequentially delivered to the bellows, drying box, roller wheel and winder, it is removed by the bellows and drying box
Residue dispersion medium on the chopped strand of orientation presses the chopped strand being orientated by the roller wheel and winder
Controlling rolling.
Preferably, the lower section of the conveyer belt is equipped with collecting pit, is situated between for collecting the dispersion filtered out through the conveyer belt
Matter.
The present invention additionally provides a kind of continuous method for alignment of chopped strand simultaneously, carries out as follows:
1) fiber disperses
The complex liquid that chopped strand and decentralized medium are formed is added into stirred tank and is stirred, the chopped strand of acquisition
Suspension flows into liquid storage tank through pipeline, removes the bubble in chopped strand suspension by the ultrasonic generator on liquid storage tank,
And it is pumped to aligning device；
2) fiber orientation
Chopped strand suspension enters in helix transporting device, drives screw turns through driving device, utilizes rotation
Screw rod makes the chopped strand suspension in tapered helical flow path generate velocity gradient and the effect by hydrodynamic shear, realizes
To the orientation of the chopped strand in suspension；
3) separation drying
It is received by the conveyer belt of the mesh structure with intensive mesh, the chopped strand suspension that filtering has been orientated, and
It is sequentially delivered to bellows, drying box, roller wheel and winder, the chopped strand being orientated is removed by bellows and drying box
On residue dispersion medium, compacting winding is carried out to the chopped strand being orientated by roller wheel and winder, is finally taken
To fiber.
Preferably, in step 1), the length of the chopped strand is 5-150mm, and the viscosity of complex liquid is 1.5-25pa.s,
The mixing speed of stirred tank is 600-1200r/min, mixing time 20-60min, the ultrasound of the ultrasonic generator on liquid storage tank
Wave frequency rate is 25-40khz；
In step 2), the length of sleeve is 300-500mm, internal diameter 50-80mm, screw speed 20-100r/min, spiral shell
The major diameter of bar is 50-80mm, and path 30-50mm, the upper end screw pitch of screw rod is 40-80mm, and lower end screw pitch is 20-40mm, spiral shell
Tooth circle number is 6-12 circle, and screw pitch is from top to bottom successively decreased, and vortex-like runner internal diameter is 7-15 ㎜, the internal diameter of discharge port upper end cylinder
For 10-18mm, along chopped strand suspension flow to smoothly tapering as pancake, the width of discharge port lower end is 1-4mm, length is
10-100mm；
In step 3), the transmission speed of conveyer belt is 8-15m/min, and the blast pressure of bellows is 0.1-0.5MPa, is done
The drying temperature of dry case is 200-300 DEG C.
Preferably, the chopped strand is carbon fiber, in glass fibre, natural fiber, polyimide fiber, chemical fibre
It is one or more.
Preferably, the decentralized medium presses mass body for one of glycerol, gelatin, sodium alginate, cellulose family and water
Product is than mixing resulting mixed liquor for 3-15g/L.
Compared with the prior art, the invention has the advantages that:
1, the prior art completes chopped strand orientation only with tapered orientation spray head, which is to fall
Pyramidal structure is limited by its shape and size, even if increasing the width of spray head, can not also prepare longer fibers orientation felt,
The length of orientation fiber is up to 15mm；And aligning device of the invention is made in tapered helical flow path using the screw rod of rotation
Chopped strand suspension generates velocity gradient and the effect by hydrodynamic shear, to realize to chopped strand in suspension
Orientation, and enter discharge port chopped strand suspension orientation is completed, fiber orientation is not by the shape of discharge port and size
Constraint can choose the discharge port of different shape and size according to the technological requirements, and fiber orientation degree of the invention is high, is orientated efficiency
Height, the fiber orientation required suitable for different length；
It 2,, can be by increasing the revolving speed of screw rod, selecting in order to adapt to greater length of orientation fiber requirements in the present invention
The mode of the viscosity of the bigger screw rod of helix perimeter or promotion fibrous suspension accordingly adjusts, or uses above-mentioned three kinds of modes
Combination carry out corrdinated adjustment, it is adaptable；
3, the present invention, can be by increasing the revolving speed of screw rod or selecting larger spiral shell in order to adapt to higher tapping flowrate requirement
The mode for revolving the screw rod of lift angle accordingly adjusts, flexible operation；
4, the present invention in practical application, for realize it is broader orientation fibrofelt preparation, can be on a moving belt just along width
A certain number of aligning devices are set side by side in degree direction；It, can be square on a moving belt for the preparation for realizing thicker orientation fibrofelt
A certain number of aligning devices are arranged before and after conveying direction, it is easy to accomplish industrialization production；
5, the applicable kinds of fibers of the present invention is unrestricted, can be carbon fiber, glass fibre, natural fiber, polyimides
One of fiber and various chemical fibres are a variety of.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the continuous aligning device of chopped strand of the present invention；
Fig. 2 is the structural schematic diagram of aligning device in the present invention.
In figure, 1 stirred tank；2 liquid storage tanks；3 ultrasonic generators；4 helix transporting devices；5 screw rods；6 helical blades；7 is tapered
Helical flow path；8 driving devices；9 discharge ports；10 snail shape runners；11 conveyer belts；12 bellows；13 drying boxes；14 roller wheels；15
Winder；16 collecting pits；17 motor-mount pumps.
Specific embodiment
Referring to Fig. 1 to Fig. 2, the device that the chopped strand of the present embodiment is continuously orientated be by stock unit, aligning device and
Separative unit is constituted, specifically:
Unit of stocking up is to be connected and composed by stirred tank 1 and liquid storage tank 2 by pipeline, by stirred tank 1 to chopped strand and
The complex liquid that decentralized medium is formed is stirred, and is obtained chopped strand suspension and is flowed into liquid storage tank 2；Liquid storage tank 2 is equipped with
Ultrasonic generator 3 is acted on using the ultrasonic wave of ultrasonic generator 3, can not only be removed in liquid storage tank 2 in chopped strand suspension
Bubble, while the fiber sedimentation being also avoided that in chopped strand suspension, hereafter, the chopped strand suspension warp in liquid storage tank 2
Motor-mount pump 17 is pumped into aligning device through diversion pipe；
Aligning device is a helix transporting device 4 being vertically arranged, and has screw pitch and spiral on the screw rod 5 of helix transporting device 4
The helical blade 6 that lift angle successively decreases along the flow direction of chopped strand suspension, screw rod 5, helical blade 6 and helix transporting device 4
Sleeve is fitted close to form tapered helical flow path 7, drives screw rod 5 to rotate by driving device 8, the screw rod 5 of rotation makes tapered spiral shell
Chopped strand suspension in eddy flow road 7 not only generates velocity gradient but also the effect by hydrodynamic shear, realizes to chopped
The orientation of fibrous suspension, and the chopped strand being orientated is long, fiber orientation degree is high, then is delivered to the separative unit of lower section；
Separative unit is made of conveyer belt 11, bellows 12, drying box 13, roller wheel 14 and winder 15, conveyer belt
11 be the mesh structure with intensive mesh, it is gentle receive it is short through being orientated of flowing out of above-mentioned 4 discharge port 9 of helix transporting device
It cuts fibrous suspension and filters, obtain the chopped strand being orientated, the chopped strand that the conveyer belt 11 constantly run will be orientated
It is sequentially delivered to bellows 12, drying box 13, roller wheel 14 and winder 15, has been taken by bellows 12 and the removing of drying box 13
To chopped strand on residue dispersion medium, the chopped strand being orientated is suppressed by roller wheel 14 and winder 15
Winding, so far chopped strand orientation is completed.
Wherein, the speed of service, height of conveyer belt 11, inclination angle are adjustable, the discharging different for adaptation orientation device
Speed, also, the top of above-mentioned bellows 12 is additionally provided with water mist spraying head, can remove on the chopped strand being orientated in air blast
Residue dispersion medium while generate water mist auxiliary separate and wash orientation fiber；The temperature of drying box 13 can automatically adjust,
For keeping the degree of drying of discharging uniform.
The simple process of the present embodiment and high-efficient can press certain way cloth according to specific requirements above conveyer belt 11
One or more aligning devices are set, to meet the requirement of the different in width and thickness of orientation fibrous felt, strong operability is easy to
Realize industrialization production, specifically:
For the preparation for realizing broader orientation fibrofelt, a fixed number can be set side by side in the width direction above conveyer belt 11
The aligning device of amount；For the preparation for realizing thicker orientation fibrofelt, can be arranged before and after conveying direction above conveyer belt 11
A certain number of aligning devices.
As a preferred scheme, lead between the discharge port 9 of helix transporting device 4 and the lower end of tapered helical flow path 7
It crosses spiral pipe to be connected, spirally pipeline forms snail shape runner 10；Also, the shape that discharge port 9 is arranged is along chopped
Fibrous suspension, which flows to, cylindrical smoothly to be tapered as pancake structure.Pass through above-mentioned tapered helical flow path 7, snail shape runner 10
It is matched with discharge port 9, it can be achieved that the chopped strand suspension being orientated is flowed by circumferential flow gentle transition to axial, in turn
Outflow can be oriented when passing through discharge port 9 by realizing, the chopped strand suspension being orientated caused by avoiding because of circumferential flow can not
The case where directional collecting, occurs.
In addition, the lower end of above-mentioned discharge port 9 is in pancake, change the shape of the fluid after discharge port 9, convenient for the biography of lower section
It send band 11 gently to receive, while helping to improve the preparation efficiency of orientation fibrofelt.
In the present embodiment, since orientation is completed in the chopped strand entered in 4 discharge port 9 of helix transporting device,
Chopped strand orientation is no longer influenced by 9 shape and size of discharge port in suspension, can choose different dischargings according to the technological requirements
Mouth 9, flexibility is good, high-efficient.
And the device that the chopped strand of the present embodiment is continuously orientated is adaptable, in order to adapt to greater length of orientation fiber
It is required that can be by increasing the revolving speed of screw rod 5, the viscosity of the screw rod 5 for selecting helix perimeter bigger or promotion fibrous suspension
Mode accordingly adjust, or using above-mentioned three kinds of modes combination come corrdinated adjustment, it is adaptable；In order to adapt to it is higher go out
Expect flow rates demand, can accordingly be adjusted by way of increasing the revolving speed of screw rod 5 or the screw rod 5 of the larger helix angle of selection,
Flexible operation.
As another preferred scheme, the lower section of conveyer belt 11 is equipped with collecting pit 16, for collecting communicated 11 mistake of band
The decentralized medium filtered out.
The present embodiment additionally provides a kind of continuous method for alignment of chopped strand, is to carry out as follows:
1) fiber disperses
The complex liquid that chopped strand and decentralized medium are formed is added into stirred tank and is stirred, the chopped strand of acquisition
Suspension flows into liquid storage tank through pipeline, removes the bubble in chopped strand suspension by the ultrasonic generator on liquid storage tank,
And it is pumped to aligning device；
2) fiber orientation
Chopped strand suspension enters in helix transporting device, drives screw turns through driving device, utilizes rotation
Screw rod makes the chopped strand suspension in tapered helical flow path generate velocity gradient and the effect by hydrodynamic shear, realizes
To the orientation of the chopped strand in suspension；
3) separation drying
It is received by the conveyer belt of the mesh structure with intensive mesh, the chopped strand suspension that filtering has been orientated, and
It is sequentially delivered to bellows, drying box, roller wheel and winder, the chopped strand being orientated is removed by bellows and drying box
On residue dispersion medium, compacting winding is carried out to the chopped strand being orientated by roller wheel and winder, is finally taken
To fiber.
Specifically, the length of chopped strand is 5-150mm in step 1), the viscosity of complex liquid is 1.5-25pa.s, stirring
The mixing speed of kettle is 600-1200r/min, mixing time 20-60min, the ultrasonic wave frequency of the ultrasonic generator on liquid storage tank
Rate is 25-40khz；In the present embodiment, selecting the length of chopped strand in fact is 80mm, and the viscosity of complex liquid is 8pa.s, stirred tank
Mixing speed is 800r/min, mixing time 30min, and the ultrasonic frequency of the ultrasonic generator on liquid storage tank is 30khz.
In step 2), the length of sleeve is 300mm, and internal diameter is 60.2 ± 0.05mm, screw speed 60r/min, screw rod
Major diameter be 60 ± 0.05mm, path 40mm, the upper end screw pitch of screw rod is 60mm, and lower end screw pitch is 20mm, and screw pitch is by upper
Successively decrease under, thread circle number is 6 circles, and thread is rectangle tooth, and tooth thickness is 5 ㎜, and vortex-like runner internal diameter is 7 ㎜, discharge port upper end circle
Cylindrical internal diameter is 10mm, along chopped strand suspension flow to smoothly tapering as pancake, the shape of discharge port pancake lower end
For the rectangular section of 2 × 20mm；
In step 3), the transmission speed of conveyer belt is 8-15m/min, and the blast pressure of bellows is 0.1-0.5MPa, is done
The drying temperature of dry case is 200-300 DEG C；In the present embodiment, selecting the transmission speed of conveyer belt in fact is 12m/min, the drum of bellows
Wind pressure is 0.3MPa, and the drying temperature of drying box is 260 DEG C.
In addition, the type of chopped strand is unrestricted in the present embodiment, can for carbon fiber, glass fibre, natural fiber,
One of polyimide fiber, chemical fibre are a variety of；The chopped strand that the present embodiment selects in fact is carbon fiber.
It with water is 3-15g/ by mass volume ratio that decentralized medium, which is one of glycerol, gelatin, sodium alginate, cellulose family,
L mixes resulting mixed liquor.It is 6g/L mixed that decentralized medium in the present embodiment, which is carboxy-propyl cellulose and water by mass volume ratio,
Close resulting mixed liquor.
To sum up, in the present embodiment, the orientation process of chopped strand is carried out continuously, high degree of automation, from stock to
Obtaining orientation fibrous felt whole process can automated production.
Claims (10)
1. a kind of device that chopped strand is continuously orientated, it is characterized in that: being made of stock unit, aligning device and separative unit；
The stock unit is used to be stirred the complex liquid that chopped strand and decentralized medium are formed, and obtains chopped strand and suspends
Liquid is simultaneously pumped to aligning device；
The aligning device is a helix transporting device (4) being vertically arranged, and is had on the screw rod (5) of the helix transporting device (4)
The helical blade (6) of screw pitch and helix angle gradual change, the screw rod (5), helical blade (6) and the helix transporting device (4)
Sleeve be fitted close to form tapered helical flow path (7), drive the screw rod (5) to rotate by driving device (8), to flowing through
The chopped strand suspension stated in tapered helical flow path (7) is orientated, and is delivered to the separative unit of lower section；
The separative unit obtains orientation and is chopped for receiving the chopped strand suspension being orientated and carrying out separating treatment to it
Compacting winding is carried out after fiber.
2. the device that chopped strand according to claim 1 is continuously orientated, it is characterized in that: the helix transporting device (4)
Discharge port (9) and the lower end of the tapered helical flow path (7) between be connected by spiral pipe, with the helical coil
Road forms snail shape runner (10).
3. the device that chopped strand according to claim 2 is continuously orientated, it is characterized in that: the discharge port (9) is arranged
Shape is smoothly to taper along chopped strand suspension flow to cylindrical as pancake structure.
4. the device that chopped strand according to claim 1 is continuously orientated, it is characterized in that: the helix transporting device (4)
Helical blade (6) screw pitch and helix angle successively decrease along the flow direction of chopped strand suspension.
5. the device that chopped strand according to claim 1 is continuously orientated, it is characterized in that:
The stock unit is to be connected and composed by stirred tank (1) and liquid storage tank (2) by pipeline, and the liquid storage tank (2) is equipped with
Ultrasonic generator (3) passes through the bubble in chopped strand suspension in the ultrasonic generator (3) removal liquid storage tank (2)；
Motor-mount pump (17) are equipped between the aligning device and the stock unit, are chopped by the motor-mount pump (17) by described
Fibrous suspension is pumped into the helix transporting device (4) through diversion pipe；
The separative unit is by conveyer belt (11), bellows (12), drying box (13), roller wheel (14) and winder (15) structure
At the conveyer belt (11) is the mesh structure with intensive mesh, for receiving, filtering the chopped strand suspension being orientated
The chopped strand being orientated is obtained, and is sequentially delivered to the bellows (12), drying box (13), roller wheel (14) and winder
(15), the residue dispersion medium on the chopped strand being orientated is removed by the bellows (12) and drying box (13), passed through
The roller wheel (14) and winder (15) carry out compacting winding to the chopped strand being orientated.
6. the device that chopped strand according to claim 5 is continuously orientated, it is characterized in that: the lower section of the conveyer belt (11)
Equipped with collecting pit (16), for collecting the decentralized medium filtered out through the conveyer belt (11).
7. a kind of continuous method for alignment of chopped strand, characterized in that connected using chopped strand described in any one of claims 1-6
The device of continuous orientation carries out as follows:
1) fiber disperses
The complex liquid that chopped strand and decentralized medium are formed is added into stirred tank and is stirred, the chopped strand of acquisition suspends
Liquid flows into liquid storage tank through pipeline, removes the bubble in chopped strand suspension by the ultrasonic generator on liquid storage tank, and pump
It send to aligning device；
2) fiber orientation
Chopped strand suspension enters in helix transporting device, drives screw turns through driving device, utilizes the screw rod of rotation
So that the chopped strand suspension in tapered helical flow path is generated velocity gradient and the effect by hydrodynamic shear, realizes to outstanding
The orientation of chopped strand in supernatant liquid；
3) separation drying
It is received by the conveyer belt of the mesh structure with intensive mesh, the chopped strand suspension that filtering has been orientated, and successively
It is sent to bellows, drying box, roller wheel and winder, is removed on the chopped strand being orientated by bellows and drying box
Residue dispersion medium carries out compacting winding to the chopped strand being orientated by roller wheel and winder, final to obtain orientation fibre
Dimension.
8. the continuous method for alignment of chopped strand according to claim 7, it is characterized in that:
In step 1), the length of the chopped strand is 5-150mm, and the viscosity of complex liquid is 1.5-25pa.s, and stirred tank stirs
Mixing speed is 600-1200r/min, mixing time 20-60min, and the ultrasonic frequency of the ultrasonic generator on liquid storage tank is
25-40khz；
In step 2), the length of sleeve is 300-500mm, internal diameter 50-80mm, screw speed 20-100r/min, screw rod
Major diameter is 50-80mm, and path 30-50mm, the upper end screw pitch of screw rod is 40-80mm, and lower end screw pitch is 20-40mm, thread circle
Number is that 6-12 is enclosed, and screw pitch is from top to bottom successively decreased, and vortex-like runner internal diameter is 7-15 ㎜, and the internal diameter of discharge port upper end cylinder is
10-18mm, along chopped strand suspension flow to smoothly tapering as pancake, the width of discharge port lower end is 1-4mm, length is
10-100mm；
In step 3), the transmission speed of conveyer belt is 8-15m/min, and the blast pressure of bellows is 0.1-0.5MPa, drying box
Drying temperature be 200-300 DEG C.
9. the continuous method for alignment of chopped strand according to claim 7, it is characterized in that: the chopped strand be carbon fiber,
One of glass fibre, natural fiber, polyimide fiber, chemical fibre are a variety of.
10. the continuous method for alignment of chopped strand according to claim 7, it is characterized in that: the decentralized medium be glycerol, it is bright
One of glue, sodium alginate, cellulose family are that 3-15g/L mixes resulting mixed liquor by mass volume ratio with water.
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| CN111087973B (en) * | 2019-12-17 | 2021-07-27 | 吉林大学 | Preparation device and preparation method of vegetable fiber fermentation modified reinforced friction material |
| CN115961499B (en) * | 2022-11-25 | 2024-04-26 | 中国科学院宁波材料技术与工程研究所 | Chopped carbon fiber orientation preparation device |
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| NL231246A (en) * | 1957-09-10 | |||
| FI53844C (en) * | 1972-06-27 | 1978-08-10 | Tampereen Verkatehdas Oy | FOERFARANDE FOER TILLVERKNING AV EN NAOLAD AENDLOES MASKINFILT |
| SE434524B (en) * | 1982-12-10 | 1984-07-30 | Verner Jankevics | PROCEDURE FOR FORMING A MATERIAL COUNTRY AND DEVICE FOR IMPLEMENTATION OF THE PROCEDURE |
| US20070059506A1 (en) * | 2005-09-12 | 2007-03-15 | Hager William G | Glass fiber bundles for mat applications and methods of making the same |
| CN102358957B (en) * | 2011-08-24 | 2015-01-07 | 中国纺织科学研究院 | Method for preparing cellulose spinning stock solution |
| CN105178090B (en) * | 2015-09-13 | 2017-04-12 | 北京化工大学 | Preparation method of chopped-fiber oriented felt |
| CN106758481B (en) * | 2016-11-25 | 2018-10-23 | 北京化工大学 | A kind of method and device for preparing chopped strand and being continuously orientated felt |
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