CN102251348A - Pneumatic stirring dispersion device for clustered fibers - Google Patents
Pneumatic stirring dispersion device for clustered fibers Download PDFInfo
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- CN102251348A CN102251348A CN2011102067303A CN201110206730A CN102251348A CN 102251348 A CN102251348 A CN 102251348A CN 2011102067303 A CN2011102067303 A CN 2011102067303A CN 201110206730 A CN201110206730 A CN 201110206730A CN 102251348 A CN102251348 A CN 102251348A
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Abstract
The invention discloses a pneumatic stirring dispersion device for clustered fibers, and the device is characterized in that an inner conical hopper (10) is provided with a disperse upflow nozzle (12) and multiple groups of electrostatic jet nozzles (13); the inner conical hopper (10) is provided with an jet orifice (11), the jet orifice (11) is in butt joint with an jet airflow inlet (7) and a conveying pipeline (6), and an outer conical hopper (9) is provided with a fluctuating airflow inlet (8); a pneumatic dispersing/mixing chamber (17) is connected with the outer conical hopper (9), and the pneumatic dispersing/mixing chamber (17) is provided with multiple groups of clockwise lateral stirring/cutting airflow nozzles (14) and counterclockwise lateral mixing/cutting airflow nozzles (15); the clockwise lateral stirring/cutting airflow nozzles (14) and the counterclockwise lateral mixing/cutting airflow nozzles (15) are communicated with an air source; and the clockwise lateral stirring/cutting airflow nozzles (14) and the counterclockwise lateral mixing/cutting airflow nozzles (15) are respectively arranged in different planes. By using the device disclosed by the invention, a cut long fiber bundle can be dispersed fully so as to form clustered fibers, thereby improving the uniform effect of adhesion between fibers and mixed powder, and reducing the content of mixed powder in base felts.
Description
Technical field
The present invention relates to a kind of dispersed with stirring device, particularly relate to the pneumatic dispersed with stirring device of a kind of cluster shape fiber.
Background technology
The glass fibre that automotive trim is commonly used both at home and abroad strengthens plastic composite board material (Glass mat reinforced thermoplastics) at present, is called for short GMT sheet material.No matter be wet method and dry process, fiber orientation in such sheet material is obvious, the vertical transverse strength ratio that causes wet processing composite board fiber is all greater than 1: 2.2, the vertical transverse strength ratio of dry process composite board fiber is all greater than 1: 1.5, and the combing acupuncture fiber base felt uniformity in the dry process is relatively poor, irregularity is all 4%～7%, because the difference of vertical transverse strength, at present height stretching gadget is remained by increasing material unit are grammes per square metre and realize that the material reducing effect of lightweight is not remarkable; In addition because the basic felt of wet processing is the paper technology manufacturing by having improved, it replaces water in traditional slurry with foam, usually slurry plays and carries fiber and mineral filler is formed the fiber base felt, thereby this process equipment input is big, energy consumption is high, Industrial Wastewater Treatment is difficult; The basic felt of dry process is to make by the combing needling process of non-manufacturing technique, thereby production process is more, and it is bigger that the quality of basic felt is influenced by operation, and each operation easily produces dust in the production, influences the pollution of employee's healthy and environment.
Other its preparation process are for example: the name of application on 03 08th, 2010 is called " a kind of production method of glass fibre reinforced thermoplastic sheet " (number of applying for a patent: 201010118786.9, open notification number: CN101792552A, open date of declaration: patented technology 2010.08.04).This invention provides a kind of production method of glass fibre reinforced thermoplastic sheet, the technological process of production comprises: glass fibre unreels and dividing sinker, glass fibre soaks into, dynamic powder adherence, cutting air-flow mixes, the baking composite setting, it is characterized in that non-twist glass fibre is through after unreeling dividing sinker, glass fiber bundle behind the dividing sinker and glass monofilament are by soaking into, dynamic powder adherence, drying is handled the back and is cut off, glass fiber bundle and glass monofilament are finished equably by the air-flow mixing chamber with polypropylene (PP) powder mixed airflow and are mixed, mixed material enters the air flow deflector dispersing chamber again, make mixed material under the effect of cutting of swirling eddy, obtain disperseing, become scattered about the basic felt that forms unordered disorder on the conveyer belt of bottom equably.Owing to form the glass bundle after glass is uniformly dispersed in this technology, the glass monofilament that forms seldom, thereby under the effect of cutting of swirling eddy, can not fully be disperseed behind glass bundle and the attached PP of monofilament bag, cause in the sheet material voidage bigger, the plate surface flatness is relatively poor, PP content of powder ratio can't reduce in the sheet material, and board cost is higher.
The name of 05 month 22 days calendar year 2001 application is called " the stirring-spraying fluidized bed and application in the preparation fibre reinforced composites " (number of applying for a patent: 01112947.6, open notification number: CN1327905A, open date of declaration: patented technology 2001.12.26).This invention provides a kind of stirring-spraying fluidized bed and application in the preparation fibre reinforced composites, its of technological process of production employing is stirring-spraying fluidized bed, with air as fluidizing agent, in fluid bed by fluidisation with stir to realize fully mixing of polymeric matrix and fiber, and fibre bundle disperse is the monofilament of adsorpting polymerization thing matrix, to reach the abundant infiltration of glass silk and basal body interface, form basic felt by the enlarging separator.Glass all forms the glass bundle after disperseing in this technology, the glass monofilament that forms seldom, the length of glass fibre is 4～20mm, the quality of glass fiber bundle is 30～40% in glass fibre and the substrate mixture, the content of PP powder is 70～40%, the density of sheet material is bigger, but this art plate only can be used for the half hitch structure material of automotive trim.
Summary of the invention
Technical problem to be solved by this invention provides a kind of fibre bundle that length is cut and is disperseed to form cluster shape fiber fully, improve the even effect that fiber and mixed-powder adhere to, reduce the pneumatic dispersed with stirring device of cluster shape fiber of the content of mixed-powder in the basic felt.
In order to solve the problems of the technologies described above, the pneumatic dispersed with stirring device of cluster shape fiber provided by the invention, the inner cone bucket is provided with uniform rising and disperses air-flow spout and many group electrostatic atomisers, rise and disperse density, the size difference of air-flow spout according to material, carry out uniformly along the conical surface, rise disperseing the nozzle diameter of air-flow spout is Φ 5～Φ 15mm; The inner cone bucket is provided with jet, and jet is to being connected to jet-stream wind inlet and conveyance conduit, and the outer cone bucket is provided with the import of the air-flow that floats; A pneumatic dispersing and mixing chamber that is connected with the outer cone bucket, pneumatic dispersing and mixing chamber be provided with the clockwise side direction of many groups stir cut the air-flow spout and counterclockwise side direction stir and cut the air-flow spout, the side direction stirring is cut the air-flow spout and is cut air-flow spout connection source of the gas with counterclockwise side direction stirring clockwise, clockwise side direction stir cut the air-flow spout and counterclockwise side direction stir and cut the air-flow spout and form one group by 1～6 spout respectively, each nozzle diameter is Φ 5～Φ 20mm, the side direction stirring is cut the air-flow spout and is cut the air-flow spout not in same plane with counterclockwise side direction stirring clockwise, pneumatic dispersing and mixing chamber axially on alternately be provided with, clockwise side direction stir cut the air-flow spout and counterclockwise side direction stir cut the air-flow spout along the drum shaft of pneumatic dispersing and mixing chamber to angle be 75～85 degree, the tangential angle of cylindrical shell circumference is 55～85 degree.
Another kind of structure of the present invention: the inner cone bucket is provided with uniform rising and disperses air-flow spout and many group electrostatic atomisers, rise and disperse density, the size difference of air-flow spout according to material, carry out uniformly along the conical surface, rise disperseing the nozzle diameter of air-flow spout is Φ 5～Φ 15mm; The inner cone bucket is provided with jet, and jet is to being connected to jet-stream wind inlet and conveyance conduit, and the outer cone bucket is provided with the import of the air-flow that floats; A pneumatic dispersing and mixing chamber that is connected with the outer cone bucket, outdoor being arranged with of pneumatic dispersing and mixing stirred the air-flow urceolus, be formed with the space between pneumatic dispersing and mixing chamber and the stirring air-flow urceolus, the side direction that is provided with stirring air-flow urceolus stirs and cuts air flow inlet, pneumatic dispersing and mixing chamber be provided with the clockwise side direction of many groups stir cut the air-flow spout and counterclockwise side direction stir and cut the air-flow spout, the air-flow spout is cut in clockwise side direction stirring and counterclockwise side direction stirs the space of cutting between the indoor chamber of the pneumatic dispersing and mixing of air-flow spout connection and pneumatic dispersing and mixing chamber and the stirring air-flow urceolus, clockwise side direction stir cut the air-flow spout and counterclockwise side direction stir and cut the air-flow spout and form one group by 1～6 spout respectively, each nozzle diameter is Φ 5～Φ 20mm, the side direction stirring is cut the air-flow spout and is cut the air-flow spout not in same plane with counterclockwise side direction stirring clockwise, pneumatic dispersing and mixing chamber axially on alternately be provided with, clockwise side direction stir cut the air-flow spout and counterclockwise side direction stir cut the air-flow spout along the drum shaft of pneumatic dispersing and mixing chamber to angle be 75～85 degree, the tangential angle of cylindrical shell circumference is 55～85 degree.
Adopt the pneumatic dispersed with stirring device of cluster shape fiber of technique scheme, owing to adopted fiber dispersion, static, shearing step, on the fiber band behind the electrostatic charge, because of the band like charges repels mutually, thereby making to produce between fibre single thread loosens and displacement, roll the interaction of rubber roll, licker-in, air-flow in addition, make between the monofilament of fibre bundle that further generation is slided relatively, loosens, disperseed, and cut fibre bundle and monofilament according to the length that plate property requires to be cut into certain-length, thereby provide fibre bundle and the monofilament of loosening, disperseing for step (2).
In pneumatic dispersion-mixing-static adhesion process step, it is indoor that fibre bundle that delivery air will loosen, disperse and monofilament are ejected into pneumatic dispersing and mixing, fibre bundle and monofilament are disperseing in the process of air-flow operation with rising, stir the shear action of cutting air-flow owing to be subjected to clockwise, the counterclockwise both direction of side direction, make fibre bundle fully be disperseed to form cluster shape fiber; The mixed-powder that sprays into mouthful static that dusts when cluster shape fiber after the dispersion and fibre single thread move with air-flow is issued in the effect of electrostatic field and mixes and adhere to; Cluster shape fiber after disperseing, mix, adhering to and filament mixture act on because of the flow field that is subjected to ascending air and side direction to stir the common formation of cutting air-flow, will successively be sent to and be mixed into net arrangement by the gas plate that floats, transfer passage.
Mix and settle in the network process step, requirement according to product technology, cluster shape fiber that mixing adheres to and filament are by the electrostatic dusting zone time, make it further adhere to a certain amount of mixed-powder, the fibre single thread and the mixed-powder that adhere to mixed-powder descend slowly and lightly under the acting in conjunction of gravity and air velocity distribution in becoming net sedimentation bucket, become net sedimentation bucket that filament and the mixed-powder that mixes is deposited in on the net conveyer belt uniformly, successively the fiber of sedimentation and polypropylene powder have formed the three-dimensional cluster shape fiber embryo felt of the chaotic of multilayer stack, make certain width, thickness, the fiber of the unordered disorder of fiber of surface density, mixed-powder base felt; There is less damage in this system to fiber, fibre bundle disperses effective, and the orientation disorder disorder of fiber, the vertical and horizontal intensity indifference of sheet material after the moulding, the fiber irregularity of sheet forming is all 1%～2%, and fibre single thread can be controlled to be 55～70: 30～45 with the mass ratio that adheres to mixed-powder in the basic felt of one-tenth net; Need not realize that lightweight material reducing effect is remarkable by increasing material unit are grammes per square metre to height stretching gadget, sheet material and processing cost are all lower.
In the base felt dusting processing step, comprise the moulding leftover pieces of producing sheet material in the mixture, the cotton-shaped material classified, that fragmentation is processed into, feed back addition are 10～30%, and the leftover bits rubbish that is produced in the automotive trim production can obtain recycling.
The present invention is directed to existing technology makes fiber become to net not enough and plate defect that cause with equipment, a kind of pneumatic by adopting, disperse, mix, static adheres to, settle into net, dusting, baking, technological processes such as composite setting, make the long fibre bundle of cutting be disperseed to form cluster shape fiber fully, improve the even effect that fiber and mixed-powder adhere to, reduce the content of mixed-powder in the basic felt, improve the orientation and the fibre net structure of fiber in the basic felt, simultaneously by adjusting the every group of pneumatic dispersion-fiber of one-tenth net arrangement and the ratio of mixed-powder, make sheet material form the combination of sandwich structure, because the sheet material medium-length fibre exists in the thermoplastic sheets with cluster shape form, its molding mode is an overall structure, form by paved in multi-layers unlike traditional product, do the time spent in lateral external forces, there is not delamination, the lamellar spacing, phenomenons such as layer and fault position are so its shear behavior is superior to like product; Secondly the fiber existence form has isotropism, so the tension of its all directions and anti-bending mechanics superior performance in like product, reduce vertical transverse strength ratio; In addition mixed-powder can be according to the market demand of sheet material, carries out modification and processing such as fire-retardant, satisfies the characteristic demand of fibre sheet material, and fiber is not subjected to the damage of mechanical fixed network in the embryo felt, improve the expansion rate of composite board, reduced density, increased the intensity quality of composite board.
Technological process of the present invention is simple, and equipment investment is few, and energy consumption is low, when the solution wet processing exists contaminated wastewater defective and dry process to have the pollution defect problem of dust, is easy to form large-scale industrialized production.
Description of drawings
Fig. 1 makes cluster shape fiber thermoplastic composite sheet material equipment overall diagram.
Fig. 2 is a kind of structural representation of the present invention.
Fig. 3 is along A-A line cut-away view among Fig. 2.
Fig. 4 is the another kind of structural representation of the present invention.
Fig. 5 is along B-B line cut-away view among Fig. 2.
The specific embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
By Fig. 1, Fig. 2 and Fig. 3 as seen, metal guide wheel and rubber tire 1, licker-in 2, directive wheel 3 and shear break bar 4 and be arranged in order back butt joint awl bucket 5, awl bucket 5 butt joint conveyance conduits 6;
A transfer passage 21 that is connected with pneumatic dispersing and mixing chamber 17, unsteady gas plate 20 is provided with along the bottom camber line of transfer passage 21, and along the mass transport direction the uniform unsteady pore of 8～20 degree angles is arranged, and is provided with the air flow inlet 19 that floats by unsteady gas plate 20;
A sedimentation mixing chamber 23 that is connected with transfer passage 21 other ends, sedimentation mixing chamber 23 is provided with four groups of electrostatic dusting spouts 22, and the bottom is for becoming net sedimentation bucket 24.
Become 24 outlets of net sedimentation bucket to being connected into net conveyer belt 25, net conveyer belt 25 front ends are to being connected to the first nonwoven fabric running roller 28, become on the net conveyer belt 25 after each becomes net sedimentation bucket 24, to be provided with running roller 26, become net conveyer belt 25 rear ends being connected to dusting device 27, high-temperature baking device 29, glued membrane running roller 30, the second nonwoven fabric running roller 34, composite roll 31, chill roll 32 and shearing knife 33.
The production method of cluster shape fiber thermoplastic composite sheet material, adopt following steps:
(1), fiber dispersion, static, shear: when non-twist fiber roving rolls by metal guide wheel and rubber tire 1, make it be with electrostatic charge 50～110KV, the fibre bundle that has electrostatic charge is by licker-in 2 card wire combings, owing to be subjected to the combing with licker-in 2 of rolling of metal and rubber roll 1, further produce relatively between the monofilament of fibre bundle and slide, loosen, disperse, after fibre bundle after the dispersion and monofilament enter shearing break bar 4 by directive wheel 3, being sheared becomes the filament that length is 10mm～150mm, fibre bundle after the shearing drops in the awl bucket 5, and it is 5～20m that jet-stream wind inlet 7 feeds flow
3The delivery air of/h, this moment, fibre bundle was brought into conveyance conduit 6 owing to be subjected to the suction function of delivery air;
(2), pneumatic dispersion-mixing-static adheres to: the filament after the shearing enters into the jet 11 of pneumatic dispersing and mixing chamber 17 via conveyance conduit 6 under the effect of delivery air, be subjected to delivery air, the rising that disperses air-flow spout 12 of rising disperses air-flow, and organize more clockwise side direction stir cut air-flow spout 14 and counterclockwise side direction stir cut side direction that air-flow spout 15 sprays stir cut the mutual shear action of air-flow after, make the fibre bundle that enters into pneumatic dispersing and mixing chamber 17 fully be disperseed to form cluster shape fiber and fibre single thread, it is 20～100m that the rising of the dispersion air-flow spout 12 that rises disperses the flow of air-flow
3/ h, clockwise side direction stir cut air-flow spout 14 and counterclockwise side direction stir the side direction of cutting air-flow spout 15 to stir the flow of cutting air-flow be 40～120m
3/ h; Simultaneously, the particle diameter that cluster shape fiber that disperses and fibre single thread and 4 groups of electrostatic atomisers 13 spray into electrostatic charge 50～110KV is that the mixed-powder of 75 μ m～500 μ m is issued to even the mixing and adhesion in the effect of electrostatic field, and the mass ratio of filament and mixed-powder is 70～75: 25～30; Cluster shape fiber after disperseing, mix, adhering to and fibre single thread are subjected to ascending air and side direction to stir the effect that air-flow forms the flow field of cutting, continuously be delivered to and mix expansion chamber 23 by transfer passage 21, the unsteady gas plate 20 that transfer passage 21 bottoms are provided with provides the gas that floats to provide unsteady power to cluster shape fiber and fibre single thread in the transfer passage 21, and the flow of the air-flow of the gas plate 20 that floats is 10～60m
3/ h;
(3), mixing settles into net: cluster shape fiber and fibre single thread carry out static spray mixed-powder by four groups of electrostatic dusting spouts 22 after entering and mixing expansion chamber 23, make it further adhere to a certain amount of mixed-powder, the mass ratio of fibre single thread and mixed-powder is 55～70: 30～45; The cluster shape fiber that is stained with mixed-powder descends slowly and lightly under the effect in gravity and flow field in becoming net sedimentation bucket 24 with fibre single thread and mixed-powder, the cluster shape fiber that becomes net sedimentation bucket 24 will be stained with mixed-powder is deposited in on the net conveyer belt 25 with fibre single thread and mixed-powder uniformly, successively the cluster shape fiber that is stained with mixed-powder of sedimentation and fibre single thread and mixed-powder have formed the three-dimensional cluster shape fiber web of the chaotic of multilayer stack, i.e. the bulk basic felt of certain width, thickness, even cluster shape fiber and mixed-powder;
(4), basic felt dusting: the bulk basic felt of even cluster shape fiber into the net is handled basic felt surface by dusting device 27 dustings after running roller 26 typings, make its surface form 25g/m
2～45g/m
2The mixed-powder layer to improve the flatness of plate surface, improves the intensity quality and the apparent mass of composite board;
(5), baking composite setting: the basic felt that step (4) is formed is finished hydrofuge, softening, fusion, plasticizing through high-temperature baking device 29; Basic felt after the plasticizing is through composite roll 31, chill roll 32 composite settings; Finish the shearing of compound, the shearing knife 33 of nonwoven fabric that the nonwoven fabric running roller 28 of sheet material provides, glued membrane that glued membrane running roller 30 provides then, formation has certain intensity, the continuous cluster shape fiber thermoplastic composite sheet material of thickness, and promptly glass fibre strengthens plastic composite board material.
Above-mentioned mixed-powder is polypropylene, polyethylene, polyvinyl chloride, polyester, calcium carbonate, talcum powder, kaolin or fire retardant filler.
Above-mentioned non-twist fiber roving is carbon fiber, glass fibre, flax fibre or xylon.
Metal guide wheel and rubber tire 1, licker-in 2, the directive wheel 3 of roving glass fiber bundle by this device in this technology, shear break bar 4, be treated as fibre bundle and monofilament necessarily loose, fixed length, the fibre bundle of cut-out and monofilament by delivery air through conveyance conduit 6 and jet 11 to pneumatic dispersing and mixing chamber 17; Fibre bundle and monofilament stir in delivery air, the dispersion air-flow that rises, clockwise and counterclockwise side direction and cut air-flow, reach under the effect of static mixed-powder air-flow, the abundant dispersion of having finished fibre bundle forms cluster shape fiber, and reaches the adhesion that mixes of fibre single thread and static mixed-powder; Mix the glass fiber that adheres to and deliver to mixing expansion chamber 23 through transfer passage 21, mix the cluster shape fiber and the filament that adhere to and pass through electrostatic dusting, make a certain amount of static mixed-powder of its progressive adhesion, adhere to static mixed-powder fibre single thread and static mixed-powder, under the effect of gravity and air velocity distribution, descend slowly and lightly in becoming net sedimentation bucket 24, become net sedimentation bucket 24 filament and mixed-powders to be deposited in into uniformly on the net conveyer belt 25 with mixing, technology requirement according to product, by the pneumatic combining form that is dispersed into net arrangement of varying number, make certain width, thickness, the cluster shape fiber of the unordered disorder of fiber of surface density, fibre single thread, mixed-powder base felt; The base felt is through typing, dusting, nonwoven fabric, baking, glued membrane, composite setting, cooling and shaping, shear, finish the operations such as typing, cooling, curing, shearing of the compound and sheet material of softening, fusion, glued membrane, nonwoven fabric, be prepared into have certain intensity, glass fibre that thickness is continuous strengthens plastic composite board material.
The present invention compares with existing technology, because the sheet material medium-length fibre exists in the thermoplastic sheets with cluster shape form, its molding mode is an overall structure, form by paved in multi-layers unlike traditional product, do the time spent in lateral external forces, there are not phenomenons such as delamination, lamellar spacing, layer and fault position, so its shear behavior is superior to like product; Secondly the fiber existence form has isotropism, so the tension of its all directions and anti-bending mechanics superior performance in like product, reduce vertical transverse strength ratio; Mixed-powder can be according to the market demand of sheet material in addition, carry out modification and processing such as fire-retardant, satisfy the characteristic demand of fibre sheet material, and fiber is not subjected to the damage of mechanical fixed network in the embryo felt, can also be by adjusting the every group of pneumatic dispersed with stirring-fiber of one-tenth net arrangement and the ratio of mixed-powder, form the combination of the sandwich structure of sheet material, improve the expansion rate of sheet material, reduce density, increase the quality of sheet material, this technological process simultaneously is simple, and equipment investment is few, energy consumption is low, environmental protection and easily form advantages such as large-scale industrialized production.
Adopt the glass fibre of this prepared to strengthen plastic composite board material, after tested, physical indexs such as this light weight board TENSILE STRENGTH, stretch modulus, bending strength, bending modulus are superior.
The another kind of structure of the pneumatic dispersed with stirring device of cluster shape fiber of the present invention, by Fig. 4 and Fig. 5 as seen, inner cone bucket 10 is provided with uniform rising and disperses air-flow spout 12 and 4 groups of electrostatic atomisers 13, rise and disperse density, the size difference of air-flow spout 12 according to material, carry out uniformly along the conical surface, rise disperseing the nozzle diameter of air-flow spout 12 is Φ 5～Φ 15mm; Inner cone bucket 10 is provided with jet 11, and 11 pairs of jets are connected to jet-stream wind inlet 7 and conveyance conduit 6, and outer cone bucket 9 is provided with the import 8 of the air-flow that floats; A pneumatic dispersing and mixing chamber 17 that is connected with outer cone bucket 9,17 peripheries, pneumatic dispersing and mixing chamber are provided with blender gas stream urceolus 16, be formed with the space between pneumatic dispersing and mixing chamber 17 and the stirring air-flow urceolus 16, the side direction that is provided with stirring air-flow urceolus 16 stirs and cuts air flow inlet 18, pneumatic dispersing and mixing chamber 17 be provided with 4～8 groups of clockwise side direction stir cut air-flow spout 14 and counterclockwise side direction stir and cut air-flow spout 15, air-flow spout 14 is cut in clockwise side direction stirring and counterclockwise side direction stirs the space of cutting between air-flow spout 15 connection pneumatic dispersing and mixing chamber 17 inner chambers and pneumatic dispersing and mixing chamber 17 and the stirring air-flow urceolus 16, clockwise side direction stir cut air-flow spout 14 and counterclockwise side direction stir and cut air-flow spout 15 and form one group by 1～6 spout respectively, each nozzle diameter is Φ 5～Φ 20mm, the side direction stirring is cut air-flow spout 14 and is cut air-flow spout 15 not in same plane with counterclockwise side direction stirring clockwise, pneumatic dispersing and mixing chamber 17 axially on alternately be provided with, clockwise side direction stir cut air-flow spout 14 and counterclockwise side direction stir cut air-flow spout 15 along the drum shaft of pneumatic dispersing and mixing chamber 17 to angle be 75～85 degree, the tangential angle of cylindrical shell circumference is 55～85 degree.
By the following examples related content of the present invention is further specified.
Embodiment 1:
Get the raw materials ready: alkali-free glass fibre 2400tex (roving, density 2.35g/cm
3, diameter 13 μ m), the glass fiber bundle sheared length is 60mm, 145# polypropylene PP powder (density 0.91g/cm
3, 80 orders), the mass ratio of glass and PP powder is 63: 37.
The pneumatic dispersed with stirring of the present invention is mixed into net embryo felt typing rear panel face density 1350g/m
2, sheet material density 0.65g/cm
3, sheet thickness δ 3.2mm, after tested, sheet material transverse tensile strength 12.68Mpa, sheet material longitudinal tensile strength 11.98Mpa; Sheet material transverse bending strength 10.97Mpa, sheet material buckling strength 9.86Mpa; Elongation at break 3.12%, sheet material expansion rate are 495%.
Embodiment 2:
Get the raw materials ready: alkali-free glass fibre 2400tex (roving, density 2.35g/cm
3, diameter 13 μ m), the glass fiber bundle sheared length is 55mm, 145#PP powder (density 0.91g/cm
3, 80 orders), the mass ratio of glass and PP powder is 60: 40.
The pneumatic dispersed with stirring of the present invention is mixed into net embryo felt typing rear panel face density 1350g/m
2, sheet material density 0.76g/cm
3, sheet thickness δ 3.0mm, after tested, sheet material transverse tensile strength 13.78Mpa, sheet material longitudinal tensile strength 12.46Mpa; Sheet material transverse bending strength 11.68Mpa, sheet material buckling strength 10.38Mpa; Elongation at break 2.96%, sheet material expansion rate are 520%.
Claims (10)
1. pneumatic dispersed with stirring device of cluster shape fiber, it is characterized in that: inner cone bucket (10) is provided with uniform rising and disperses air-flow spout (12) and many group electrostatic atomisers (13), inner cone bucket (10) is provided with jet (11), described jet (11) is to being connected to jet-stream wind inlet (7) and conveyance conduit (6), and outer cone bucket (9) is provided with the import (8) of the air-flow that floats; A pneumatic dispersing and mixing chamber (17) that is connected with described outer cone bucket (9), described pneumatic dispersing and mixing chamber (17) be provided with the clockwise side direction of many groups stir cut air-flow spout (14) and counterclockwise the side direction stirring cut air-flow spout (15), clockwise side direction stir cut air-flow spout (14) and counterclockwise side direction stir and cut air-flow spout (15) and be communicated with source of the gas, described clockwise side direction stirs cuts air-flow spout (14) and counterclockwise side direction stirring and cuts air-flow spout (15) and be in the Different Plane respectively.
2. the pneumatic dispersed with stirring device of cluster shape fiber according to claim 1 is characterized in that: it is Φ 5～Φ 15mm that described rising disperses the nozzle diameter of air-flow spout (12).
3. the pneumatic dispersed with stirring device of cluster shape fiber according to claim 1 and 2, it is characterized in that: described clockwise side direction stir cut air-flow spout (14) and counterclockwise the side direction stirring cut air-flow spout (15) and form one group by 1～6 spout respectively, each nozzle diameter is Φ 5～Φ 20mm.
4. the pneumatic dispersed with stirring device of cluster shape fiber according to claim 1 and 2 is characterized in that: described clockwise side direction stir cut air-flow spout (14) and counterclockwise side direction stir and cut air-flow spout (15) and axially go up alternately setting in described pneumatic dispersing and mixing chamber (17).
5. the pneumatic dispersed with stirring device of cluster shape fiber according to claim 1 and 2, it is characterized in that: clockwise side direction stir cut air-flow spout (14) and counterclockwise side direction stir cut air-flow spout (15) along the drum shaft of described pneumatic dispersing and mixing chamber (17) to angle be 75～85 degree, the tangential angle of cylindrical shell circumference is 55～85 to spend.
6. pneumatic dispersed with stirring device of cluster shape fiber, it is characterized in that: inner cone bucket (10) is provided with uniform rising and disperses air-flow spout (12) and many group electrostatic atomisers (13), described inner cone bucket (10) is provided with jet (11), described jet (11) is to being connected to jet-stream wind inlet (7) and conveyance conduit (6), and outer cone bucket (9) is provided with the import (8) of the air-flow that floats; A pneumatic dispersing and mixing chamber (17) that is connected with described outer cone bucket (9), periphery, pneumatic dispersing and mixing chamber (17) is provided with blender gas stream urceolus (16), be formed with the space between described pneumatic dispersing and mixing chamber (17) and the described stirring air-flow urceolus (16), the side direction that is provided with described stirring air-flow urceolus (16) stirs and cuts air flow inlet (18), described pneumatic dispersing and mixing chamber 17 be provided with the clockwise side direction of many groups stir cut air-flow spout (14) and counterclockwise the side direction stirring cut air-flow spout (15), described clockwise side direction stir cut air-flow spout (14) and counterclockwise side direction stir and cut air-flow spout (15) and be communicated with space between described pneumatic dispersing and mixing chamber (17) inner chamber and described pneumatic dispersing and mixing chamber (17) and the described stirring air-flow urceolus (16), described clockwise side direction stirring is cut air-flow spout (14) and counterclockwise side direction stirring and is cut air-flow spout (15) and be in the Different Plane respectively.
7. the pneumatic dispersed with stirring device of cluster shape fiber according to claim 6 is characterized in that: it is Φ 5～Φ 15mm that described rising disperses the nozzle diameter of air-flow spout (12).
8. according to claim 6 or the pneumatic dispersed with stirring device of 7 described cluster shape fibers, it is characterized in that: described clockwise side direction stir cut air-flow spout (14) and counterclockwise the side direction stirring cut air-flow spout (15) and form one group by 1～6 spout respectively, each nozzle diameter is Φ 5～Φ 20mm.
9. according to claim 6 or the pneumatic dispersed with stirring device of 7 described cluster shape fibers, it is characterized in that: described clockwise side direction stir cut air-flow spout (14) and counterclockwise side direction stir and cut air-flow spout (15) and axially go up alternately setting in described pneumatic dispersing and mixing chamber (17).
10. according to claim 6 or the pneumatic dispersed with stirring device of 7 described cluster shape fibers, it is characterized in that: described clockwise side direction stir cut air-flow spout (14) and counterclockwise side direction stir cut air-flow spout (15) along the drum shaft of pneumatic dispersing and mixing chamber (17) to angle be 75～85 degree, the tangential angle of cylindrical shell circumference is 55～85 to spend.
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| CN114159990A (en) * | 2021-12-03 | 2022-03-11 | 河海大学 | Device and method for dispersing carbon fibers in material |
| CN114290524A (en) * | 2021-12-03 | 2022-04-08 | 东华大学 | Device for dispersing bunched fibers into single fibers |
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| CN102251348B (en) | 2013-04-03 |
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