CN109177106A - Orient the wire squeeze device and method of chopped carbon fiber enhancing thermoplastic composite - Google Patents
Orient the wire squeeze device and method of chopped carbon fiber enhancing thermoplastic composite Download PDFInfo
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- CN109177106A CN109177106A CN201810737602.3A CN201810737602A CN109177106A CN 109177106 A CN109177106 A CN 109177106A CN 201810737602 A CN201810737602 A CN 201810737602A CN 109177106 A CN109177106 A CN 109177106A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
- B29K2105/12—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of short lengths, e.g. chopped filaments, staple fibres or bristles
- B29K2105/14—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of short lengths, e.g. chopped filaments, staple fibres or bristles oriented
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/731—Filamentary material, i.e. comprised of a single element, e.g. filaments, strands, threads, fibres
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention discloses the wire squeeze device and method of the orientation chopped carbon fiber enhancing thermoplastic composite in composite processing field, the intracavitary portion middle of melting material is equipped with multifunctional stirring device, material-extruding chamber of the bottom of melting material chamber through gate valve connection left and right horizontal arrangement, it is horizontally disposed telescoping hydraulic cylinder on the left of material-extruding chamber, the right end of telescoping hydraulic cylinder is connected with level-one sleeve piston, and two-level sleeve piston and level-one sleeve piston are coaxially connected；The right end outlet of material-extruding chamber is coaxially connected and is connected to tapered ladder tube nozzle, there is multistage tapering type ladder pipe from left to right, the internal diameter of the pipeline of tapering type ladder pipe successively successively decreases from left to right and left and right length is successively successively decreased from left to right inside tapered ladder tube nozzle；The present invention combines three blanking, stirring, material extrusion processes together, guides chopped carbon fiber silk to squeeze out aligning for direction along material in thermoplastic resin matrix, chopped carbon fiber silk and thermoplastic resin matrix's raw material are directly processed into continuous silk material.
Description
Technical field
The present invention relates to composite processing fields, enhance thermoplastic composite material more particularly to the chopped carbon fiber of orientation
The wire squeeze device and method of material.
Background technique
Carbon fiber is a kind of fibrous carbon material, has many advantages, such as high temperature resistant, anticorrosive, high thermal conductivity, is mainly made into carbon
Fibre reinforced composites come using.In actual use, carbon fibre reinforced composite is multiple with other fiber reinforcements
The incomparable performance advantage of condensation material, it is this composite material strength height, endurance, anticorrosive, it is electrically and thermally conductive functional.
With the application of 3D printing technique, one kind being had become using 3D printing technique production carbon fibre reinforced composite new type of component
Emerging manufacturing process.Common 3D printing forming technique has: SLA technology, FDM technology, SLS technology, LOM technology and 3DP skill
Art etc., wherein FDM technology is because its operating cost is low, print quality is good, forming accuracy is high, material category is more, post-processing is simple
Etc. advantages and be widely used.Enhance silk material, the usually thermoplasticity by melting based on chopped carbon fiber used in FDM technique
Resin matrix passes through wire squeeze device with chopped carbon fiber silk after mixing and is prepared.Enhancing silk material using chopped carbon fiber
When carrying out FDM printing, the degree of orientation of the chopped carbon fiber silk in the thermoplastic resin matrix mechanical property final to silk material has very
Big influence.Under current hybrid mode, chopped carbon fiber silk random alignment in thermoplastic resin matrix, show it is each to
Same sex property, so that it is limited to improve the mechanical property for being prepared into composite element, the distinctive designability of composite material is excellent
Gesture is difficult to give full play to.Therefore, design that a kind of chopped carbon fiber is uniformly mixed with thermoplastic resin matrix and fiber orientation is consistent
Throwing device, to realize high-performance thermoplastic carbon fibre composite 3D printing be particularly important.
A kind of chopped carbon fiber and thermoplasticity are disclosed in the document that existing China Patent Publication No. is CN106891518A
Composite material mixing aligns processing unit, comprising: hot melt heating device, air pressure extrusion device, asymmetric uniformly stir
Mix device, short carbon nanometer tube fiber polarization treatment device and automatic wire coiling device.The device can be realized chopped carbon fiber enhancing
Silk material it is prefabricated, printing prefabricated silk material can be improved the printing precision and mechanical performance of carbon fiber structural part.But existing for it
The disadvantage is that:
It (1) is to emit high voltage electric field by antenna to the orientation principle of chopped carbon fiber silk, moment realizes conductive chopped carbon fiber
Polarization, and realize that it aligns processing in molten thermoplastic composite matrix.But often due to molten thermoplastic
The high viscosity of composite material and the flexibility of fiber, electric field strength needed for making fiber polarization orientation is big, field distribution is complicated, holds
Easily cause fiber alignment arrangement effect undesirable, and there are security risks.
(2) asymmetric uniform stirrer used by has a single function, only comprising to chopped carbon fiber powder and thermoplastic
Property composite material classification stirring, for high viscosity molten resin matrix, upper and lower level stir evenly degree difference it is larger,
It is be easy to cause the unstable of later period wire squeeze quality and performance, and stirring efficiency is lower.
(3) it is cylinder that power source is squeezed out used by, leans on the pressed gas inputted from cylinder pipeline to height during wire squeeze
The molten thermoplastic composite material of viscosity applies pushing force, therefore required gas pressure is big, and pressed gas is also easy to be mixed into
There is bubble so as to cause in squeezing out silk material in thermoplastic composite melt body, and then influences prepared silk material and final fiber is multiple
The mechanical property of condensation material product.
(4) during the technology is to stirring, wire squeeze, the flow regime of melt body, which is acted upon by temperature changes, to be not given to sufficiently
Consider, therefore in wire squeeze channel, the position violent positioned at flow velocity and pressure change be easy to cause blocking, especially when each work
Make circulation to complete and after shutting down, remain in wire squeeze channel, the high viscosity thermoplastic composite melt body that does not squeeze out completely can be by
Gradually cooled and solidified causes great waste of raw materials while blocking wire squeeze channel so that wire squeeze work be difficult to smoothly, hold
It is continuous to carry out.
Summary of the invention
In order to overcome what traditional 3D printing wire squeeze device and above-mentioned chopped carbon fiber and thermoplastic composite mixed to determine
Uniformly mix that difficulty is big, chopped carbon fiber silk to chopped carbon fiber silk and thermoplastic composite present in arrangement processing unit
Be difficult to realize to align in the thermoplastic composite of melting and molten thermoplastic composite material in extrusion process with
Temperature reduces the problems such as being easy blocking, and the present invention provides a kind of wire squeeze dress of orientation chopped carbon fiber enhancing thermoplastic composite
It sets, the generation of the above problem is effectively avoided by the combination of various structures.Meanwhile present invention provides the controlling parties of the device
Method.
To achieve the above object, the wire squeeze device of orientation chopped carbon fiber enhancing thermoplastic composite of the present invention
Technical solution be: including upper and lower vertically arranged melting material chamber, hopper is connected to melting material top of chamber, and the intracavitary portion middle of melting material fills
There is multifunctional stirring device, multifunctional stirring device is fixedly and coaxially connected the output shaft of stirring motor；The bottom of melting material chamber is through lock
Valve connects the material-extruding chamber of left and right horizontal arrangement, is horizontally disposed telescoping hydraulic cylinder, telescoping hydraulic cylinder on the left of material-extruding chamber
Right end be connected with level-one sleeve piston, the inner wall of level-one sleeve piston outer wall and material-extruding chamber is slidably and sealingly connected with, two-level sleeve
Piston and level-one sleeve piston are coaxially connected；The right end outlet of material-extruding chamber is coaxially connected and is connected to tapered ladder tube nozzle, gradually
There is multistage tapering type ladder pipe from left to right, the internal diameter of the pipeline of tapering type ladder pipe is from a left side inside contracting ladder tube nozzle
It turns right and successively successively decreases and left and right length is successively successively decreased from left to right.
Further, coil heater one is surrounded by the outer wall of melting material chamber, one outer wall of coil heater is enclosed with guarantor
Wen Mianyi；It is surrounded by coil heater two outside the right side of material-extruding chamber is half side, two outer wall of coil heater is enclosed with heat-preservation cotton two；Gradually
It is surrounded by coil heater three outside contracting ladder tube nozzle, three outer wall of coil heater is enclosed with heat-preservation cotton three.
Further, multifunctional stirring device is by level-one stirring rod, second level stirring rod, spiral feeding flabellum, material scraping plate,
T-type stirring rod composition, second level stirring rod are fixedly and coaxially connected level-one stirring rod lower end, and level-one stirring rod upper end is fixedly and coaxially connected
Stirring motor is sequentially arranged with spiral feeding flabellum, material scraping plate and T-type stirring rod, two from top to bottom on level-one stirring rod
Spiral material extrusion flabellum is housed on grade stirring rod.
Further, tapering type ladder pipe is 4~8 grades, and the left side in two adjacent tapering type ladder pipes of left and right is gradually
The internal diameter ratio of contracting formula ladder pipe and the tapering type ladder pipe on right side is 1.3~1.5, and the tapering type ladder pipe in left side and right side are gradually
The left and right length ratio of contracting formula ladder pipe is 1.1~1.3.
Further, the right side outside tapered ladder tube nozzle is sequentially arranged with chill roll, parcel cylinder, and parcel cylinder is by parcel
Motor drives rotation.
Further, it is intracavitary from top to protrude into melting material for rotating sprinkler, and rotating sprinkler connects water pipe one end, and water pipe is another
End connection water tank, water pipe are equipped with valve, and water tank is located at the lower section of the right end outlet of tapered ladder tube nozzle.
The wire squeeze method of the wire squeeze device of orientation chopped carbon fiber enhancing thermoplastic composite of the present invention uses
Technical solution be: have follow steps:
A, after closing gate valve, thermoplastic resin matrix and chopped carbon fiber silk send raw material, raw material to enter melting material chamber to hopper, coil pipe
The heating of formula heater a pair of melting material chamber, coil heater one kept the temperature, at the same stirring motor drive multifunctional stirring axis into
Row rotation；
B, when chopped carbon fiber silk and thermoplastic resin matrix after mixing, coil heater one stop heating, beat simultaneously
Valve is opened a sluice gate, uniformly mixed chopped carbon fiber enhancing melt body is pushed downwardly into material-extruding chamber by multifunctional stirring axis from melting material chamber；
C, telescopic hydraulic cylinder working drives level-one sleeve piston and two-level sleeve piston to push the melt body mixed from left to right
Material wire squeeze, meanwhile, coil heater two and coil heater three heat, and heat-preservation cotton two and heat-preservation cotton three are kept the temperature；
D, telescoping hydraulic cylinder driving level-one sleeve piston and two-level sleeve piston move downward and return to original position.
Further, in step C, the right side outside tapered ladder tube nozzle is sequentially arranged with chill roll, parcel cylinder, when
The chopped carbon fiber of melting enhances melt body after squeezing out to the right in tapered ladder tube nozzle, passes sequentially through the cooling equipped with cold water
Roller is cooling, and forming chopped carbon fiber enhances silk material, carries out curled hair collection to chopped carbon fiber enhancing silk material by parcel cylinder.
Further, after the completion of curled hair is collected, entered in melting material chamber with rotary nozzle and it is rinsed with clear water, together
When open gate valve, clear water enters in material-extruding chamber, telescopic hydraulic cylinder working, and level-one sleeve piston and two-level sleeve piston are to the right
Movement flows into water in water tank from extrusion in tapered ladder tube nozzle.
The present invention is after adopting the above technical scheme, have the beneficial effect that
(1) the multifunctional stirring axis that the present invention uses, three blanking, stirring, material extrusion processes are combined together.In blanking process
In, it can realize that chopped carbon fiber silk is uniformly shed in melting material chamber using spiral feeding flabellum, to avoid chopped carbon fiber
The generation of a large amount of coacervations of silk.In whipping process, chopped carbon fiber silk and thermoplastic may be implemented using Multi-stage stirring mechanism
The uniform mixing of property resin matrix.The present invention is during material extrusion, it is contemplated that molten thermoplastic resin's matrix viscosity is higher, only borrows
It helps self gravity to be difficult to smoothly glide, therefore chopped carbon fiber silk and molten thermoplastic resin is pushed using spiral material extrusion flabellum
Mixing melt body is flowed.In addition, hydraulic energy is converted into machinery during wire squeeze, using telescoping hydraulic cylinder by the present invention
Can, chopped carbon fiber enhancing melt body is uniformly squeezed out by I and II sleeve piston, both avoided oil liquid with to mix melt body direct
Contact in turn avoids the defect of bubble occur in extrusion silk material.In the process of cleaning, it can be realized the recycling of water, thus
Achieve the purpose that green, environmental protection.
(2) present invention combines the multiple working procedures such as blanking, stirring, wire squeeze, curled hair, cleaning together, improve the device
Service performance, have the characteristics that control precisely, it is high degree of automation, safe.
(3) present invention realizes chopped carbon fiber silk and thermoplastic resin matrix (powdery/graininess) raw material is direct
It is processed into the purpose of continuous silk material, carries out beating for carbon fiber structural part in order to which silk material is directly used on 3D printer by the later period
Print.For tapered ladder tube nozzle using the narrow gap between tapering type inner wall, when molten thermoplastic composite material flow through it is narrow
When narrow pipe road, biggish shearing force will guide chopped carbon fiber silk to squeeze out direction along material in thermoplastic resin matrix
It aligns, is conducive to the regulation of chopped carbon fiber enhancing thermoplastic composite 3D printing part mechanical property.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, invention is further described in detail:
Fig. 1 is the structural schematic diagram for the wire squeeze device that orientation chopped carbon fiber of the present invention enhances thermoplastic composite；
Fig. 2 is to I partial enlarged view in Fig. 1；
In figure: 1. melting material chambers, 2. melting material chamber sealing covers, 3. hoppers, 4. conveyer belts, 5. transport motors, 6. stirring motors, 7. level-ones
Stirring rod, 8. spiral feeding flabellums, 9. material scraping plates, 10.T type stirring rod, 11. second level stirring rods, 12. spiral material extrusion fans
Leaf, 13. gate valves, 14. material-extruding chambers, 15. telescoping hydraulic cylinders, 16. level-one sleeve pistons, 17. two-level sleeve pistons, 18. is tapered
Ladder tube nozzle, 19. chill rolls one, 20. chill rolls two, 21. chopped carbon fibers enhance silk material, 22. parcel cylinders, 23. parcels
Motor, 24. coil heaters one, 25. heat-preservation cottons one, 26. coil heaters two, 27. heat-preservation cottons two, 28. coileds add
Hot device three, 29. heat-preservation cottons three, 30. rotating sprinklers, 31. valves, 32. water pipes, 33. water tanks, 34. multifunctional stirring devices,
35. tapering type ladder pipe.
Specific embodiment
Referring to Fig. 1, the wire squeeze device of orientation chopped carbon fiber enhancing thermoplastic composite of the present invention includes: mixed
Close stirring system, telescopic hydraulic classification wire squeeze system, automatic wire coiling system, heating system and automatic cleaning system.For
Above-mentioned each system carries out control by master controller and realizes coordinated operation, is finally completed the preparation of chopped carbon fiber enhancing silk material.
The mixing and stirring system include: melting material chamber 1, melting material chamber sealing cover 2, hopper 3, conveyer belt 4, transport motor 5,
Stirring motor 6, multifunctional stirring device 34 and gate valve 13.About 1 melting material chamber is arranged vertically, and the installation of top opening installation place is melted
Expect chamber sealing cover 2, stirring motor 6 is arranged vertically, positioned at the top of melting material chamber sealing cover 2, and stirring motor 6 and melting material chamber 1
Central axis coincides.Hopper 3 is fixedly mounted on melting material chamber sealing cover 2, and is connected at the top of melting material chamber 1.Conveyer belt 4 is installed
Hopper 3 top and driven by transport motor 5, be responsible for feeding work.
Multifunctional stirring device 34 is installed in 1 inside middle of melting material chamber, multifunctional stirring device 34 is located at stirring motor 6
Underface and be fixedly connected with the output shaft of stirring motor 6,34 rotary work of multifunctional stirring device is driven by stirring motor 6.
Stirring motor 6, the central axis of multifunctional stirring device 34, the central axis three of melting material chamber 1 are conllinear.
Multifunctional stirring device 34 is by level-one stirring rod 7, second level stirring rod 11, spiral feeding flabellum 8, material scraping plate 9, T
Type stirring rod 10 forms.Second level stirring rod 11 is fixedly and coaxially connected the lower end of level-one stirring rod 7, and the upper end of level-one stirring rod 7 is same
Axis is fixedly connected with stirring motor 6, is sequentially installed with spiral feeding flabellum 8, material scraping plate 9 from top to bottom on level-one stirring rod 7
With T-type stirring rod 10.The outer diameter of material scraping plate 9 is approximately less than the internal diameter of melting material chamber 1 and is greater than spiral feeding flabellum 8 and T-type stirring
The outer diameter of bar 10.Spiral material extrusion flabellum 12 is installed on second level stirring rod 11.
The bottom of melting material chamber 1 is provided with the outlet of material chamber, and gate valve 13 is mounted on material chamber exit, just positioned at second level stirring rod 11
Lower section.The lower section of gate valve 13 is the material-extruding chamber 14 of left and right horizontal arrangement, and gate valve 13 is connected between material-extruding chamber 14 and melting material chamber 1,
The connection and partition of melting material chamber 1 and material-extruding chamber 14 are realized with closure by the unlatching of gate valve 13.
Referring to Fig. 1, the telescopic hydraulic classification wire squeeze system includes: material-extruding chamber 14, telescoping hydraulic cylinder 15, level-one
Sleeve piston 16, two-level sleeve piston 17.Material-extruding chamber 14 is horizontally disposed, positioned at gate valve 13 lower section and pass through gate valve 13 and melting material
Chamber 1 is connected.It is horizontally disposed telescoping hydraulic cylinder 15, the cylinder body of telescoping hydraulic cylinder 15 and material extrusion in the left side of material-extruding chamber 14
Chamber is connected and sealed between 14 left end.The right end of telescoping hydraulic cylinder 15 is connected with level-one sleeve piston 16.Level-one sleeve is living
It fills in 16 outer walls to connect with the inner wall slidable sealing of material-extruding chamber 14, carries out piston motion.Two-level sleeve piston 17 and level-one sleeve
Piston 16 is coaxially connected.Level-one sleeve piston 16 and two-level sleeve piston 17 are all located inside material-extruding chamber 14, and along material-extruding chamber 14
Central axial move left and right.When level-one sleeve piston 16 and two-level sleeve piston 17 are located at initial position, level-one sleeve is living
The inner left wall of the left side wall and material-extruding chamber 14 of plug 16 fits, and the left side wall of two-level sleeve piston 17 and level-one sleeve piston
16 right side wall fits.
Referring to Fig. 1, the automatic wire coiling system includes: tapered ladder tube nozzle 18, chill roll 1, chill roll two
20, chopped carbon fiber enhances silk material 21, parcel cylinder 22, parcel motor 23.The right end outlet of material-extruding chamber 14 is coaxially connected and is connected to
Tapered ladder tube nozzle 18.
Referring to fig. 2, multistage tapering type ladder pipe 35 from left to right, this hair are included inside tapered ladder tube nozzle 18
Tapering type ladder pipe 35 in bright takes 4~8 grades, and 4 grades of tapering type ladder pipes 35 are only shown in Fig. 2.The pipe of tapering type ladder pipe 35
Road internal diameter successively successively decreases from left to right, and the internal diameter of the tapering type ladder pipe 35 of the leftmost side is maximum, equal to going out for 14 right end of material-extruding chamber
Mouth internal diameter is D1, the internal diameter of the tapering type ladder pipe 35 of the rightmost side is minimum, is Dk+1, wherein k+1 be tapering type ladder pipe 35 from
Left-to-right series.Wherein, in two adjacent tapering type ladder pipes 35 of left and right, the tapering type ladder pipe 35 in left side and the adjacent right side
The internal diameter ratio of the tapering type ladder pipe 35 of side is in 1.3~1.5 ranges, i.e. Dk/Dk+1=1.3~1.5.In addition, tapering type rank
The left and right length of terraced pipe 35 is successively successively decreased from left to right, and the left and right length of the tapering type ladder pipe 35 of the leftmost side is maximum, is L1, most
The internal diameter of the tapering type ladder pipe 35 on right side is minimum, is Lk+1.In two adjacent tapering type ladder pipes of left and right, left side is tapering type
The ratio of the length of the tapering type ladder pipe of ladder pipe and adjacent right side is in 1.1~1.3 ranges, i.e. Lk/Lk+1=1.1~1.3.
The outer diameter of the internal diameter and two-level sleeve piston 17 of the tapering type ladder pipe 35 of the second level from left to right matches, and makes two-level sleeve
The internal diameter that piston 17 can protrude into the tapering type ladder pipe 35 of the second level carries out wire squeeze.
Right side outside tapered ladder tube nozzle 18 is sequentially installed with chill roll 1, chill roll 2 20, parcel cylinder 22.
Parcel motor 23 is installed in the lower section of parcel cylinder 22.Tapered ladder tube nozzle 18 utilizes the narrow seam between tapering type inner wall
Gap, when molten thermoplastic composite material flows through narrow conduit, biggish shearing force will promote chopped carbon fiber silk gradually
Direction is squeezed out along material to be orientated.When the chopped carbon fiber of melting enhancing silk material 21 is squeezed out from tapered ladder tube nozzle 18,
Chill roll 1 and chill roll 2 20 are passed sequentially through, chill roll 1 and 2 20 inside of chill roll are equipped with cold water, can be to melting
Chopped carbon fiber enhancing silk material 21 be rapidly cooled, prevent it from deforming during parcel because of tension.Parcel cylinder 22 by
Parcel motor 23 drives rotation, and the chopped carbon fiber enhancing silk material 21 after cooling and solidifying is collected, final to realize the carbon that is chopped
The preparation of fiber reinforcement silk material 21.
Referring to Fig. 1 and Fig. 2, the heating system includes: melting material chamber heating device, material-extruding chamber attemperator and tapered rank
Terraced tube nozzle preheating device, they are all made of coil heater and heat-preservation cotton.Melting material chamber heating device is fixedly mounted
On the outer wall for being located at melting material chamber 1, the outer wall of one 24 pairs of melting material chambers 1 of coil heater is surrounded, in coil heater
One 24 outer walls carry out package heat preservation with heat-preservation cotton 1, and effect is that thermoplastic resin matrix is carried out heating and melting.Material-extruding chamber
The right side that attemperator is located at material-extruding chamber 14 is half side outer, and the outer wall of 2 26 pairs of material-extruding chambers 14 of coil heater is surrounded, and
Package heat preservation is carried out to it outside coil heater 2 26 with 2 27 pairs of heat-preservation cotton, effect is the composite material for preventing melting
Increase extrusion force because temperature reduces, or even solidification phenomenon occurs.And tapered ladder tube nozzle preheating device is located at tapered rank
The outer wall of 3 28 pairs of coil heater tapered ladder tube nozzles 18 is surrounded, is used in combination by the outer wall of terraced tube nozzle 18
3 29 pairs of coil heaters 3 28 of heat-preservation cotton carry out package heat preservation, and effect is to prevent the chopped carbon fiber enhancing silk material of melting
21 freeze and stopped nozzles, to be conducive to the lasting extrusion of silk material.
Referring to Fig. 1, the automatic cleaning system includes: rotating sprinkler 30, valve 31, water pipe 32 and 33 groups of water tank
At.Rotating sprinkler 30 passes through melting material chamber sealing cover 2, protrudes into from the top of melting material chamber 1, positioned at the lower section of melting material chamber sealing cover 2.
Rotating sprinkler 30 connects 32 one end of water pipe, and 32 other end of water pipe connects water tank 33, and valve 31, water tank 33 are installed on water pipe 32
Positioned at the lower section that the right end of tapered ladder tube nozzle 18 exports, water tank 33 can not only provide water source to automatic cleaning system,
It can also will clean the waste water flowed out after all devices to recycle, to accomplish to save water, avoid wasting.
Mixing and stirring system works constantly, includes three blanking, stirring and material extrusion processes: gate valve 13 is protected in blanking process
Closing is held, transport motor 5 drives conveyer belt 4 to carry out feeding into hopper 3, successively by thermoplastic resin matrix's (powdery/particle
Shape) and chopped carbon fiber silk be sent in melting material chamber 1 by a certain percentage, when raw material by hopper 3 enter melting material chamber 1 after first fall
On spiral feeding flabellum 8, raw material can uniformly be spread to the inside of melting material chamber 1, be realized by the rotation of spiral feeding flabellum 8
The purpose that raw material is uniformly shed, to avoid the generation of a large amount of coacervations of chopped carbon fiber silk.In addition, thermoplastic resin into
Start to heat melting material chamber 1 when entering to melting material chamber 1.In whipping process, gate valve 13 is still remained turned-off, and is stirred using multi-functional
The spiral feeding flabellum 8 on axis 34, material scraping plate 9, T-type stirring rod 10 and spiral material extrusion flabellum 12 is mixed to carry out mixed raw material
Stirring reaches the mixed uniformly purpose of the two.Wherein material scraping plate 9 can also scrape the melted material being sticked on 1 inner wall of melting material chamber
Under, reduce waste of material.Gate valve 13 is opened during material extrusion, it is contemplated that molten thermoplastic resin's matrix viscosity is generally higher,
It is difficult to smoothly slip down to material-extruding chamber 14 only by self gravity, therefore chopped carbon fiber silk is pushed using spiral material extrusion flabellum 8
It is pushed into material-extruding chamber 14 by the flowing that melt body is mixed with molten thermoplastic resin from melting material chamber 1.
When telescopic hydraulic is classified the work of wire squeeze system, in process (i.e. piston moves right) early period, level-one sleeve piston
16 and two-level sleeve piston 17 remain fit-state and move right together.When level-one sleeve piston 16 and material-extruding chamber 14
When right side inner wall fits, 16 stop motion of level-one sleeve piston, and two-level sleeve piston 17 continues to move right, until its with
Stop motion when the tapering type ladder pipe 35 of the second level from left to right inside tapered ladder tube nozzle 18 fits.It is returning
When journey (i.e. piston moves downward), two-level sleeve piston 17 is first moved downward, after encountering level-one sleeve piston 16, level-one sleeve
Piston 16 and two-level sleeve piston 17 keep being bonded simultaneously carries out drawback movement to the left together, until level-one sleeve piston 16 encounter it is crowded
The stop motion when inner left wall of chamber 14 is expected, to complete primary complete piston motion.Pass through level-one sleeve piston 16 and two
The reciprocating motion of grade sleeve piston 17, to achieve the purpose that wire squeeze.
As shown in Figure 1, 2, the wire squeeze device work of orientation chopped carbon fiber enhancing thermoplastic composite of the present invention
Specific step is as follows when making:
One, in the feeding process, gate valve 13 remains turned-off, and transport motor 5 drives conveyer belt 4 successively by thermoplastic resin matrix
(powdery/graininess) and chopped carbon fiber silk carry out feeding into hopper 3, after thermoplastic resin matrix enters melting material chamber 1, disk
One 24 pairs of melting material chambers 1 of tube heater heat, while stirring motor 6 drives multifunctional stirring axis 34 to be rotated.Work as biography
After the completion of sending 4 feeding of band, transport motor 5 stops working.When one 24 heating temperature of coil heater reaches the melting temperature of resin
After degree, coil heater 1 is kept the temperature.When chopped carbon fiber silk and thermoplastic resin matrix after mixing, coiled
Heater 1 stops heating, while gate valve 13 is opened, so that melting material chamber 1 and material-extruding chamber 14 penetrate through, drives in stirring motor 6 more
In 34 rotary course of function agitating shaft, uniformly mixed chopped carbon fiber enhancing melt body is pushed downwardly into material-extruding chamber from melting material chamber 1
In 14.
Two, after uniformly mixed chopped carbon fiber enhancing melt body fully enters material-extruding chamber 14,15 work of telescoping hydraulic cylinder
Make, drive level-one sleeve piston 16 and two-level sleeve piston 17 that the melt body material mixed is pushed to carry out wire squeeze, two-level sleeve is living
Plug 17, which is protruded into, carries out wire squeeze in the tapering type ladder pipe 35 of the second level.At the same time, material-extruding chamber attemperator and tapered ladder
Coil heater in tube nozzle preheating device is heated and is kept the temperature.When the chopped carbon fiber enhancing melt body of melting is from gradually
After being squeezed out to the right in contracting ladder tube nozzle 18, passes sequentially through chill roll 1 and chill roll 2 20 equipped with cold water and carry out quickly
Cooling, forming chopped carbon fiber enhances silk material 21.Then parcel motor 23 works, and drives parcel cylinder 22 to rotate, thus to being made
Chopped carbon fiber enhancing silk material 21 carry out curled hair collection.
After squeezing out and curled hair work is fully completed, telescoping hydraulic cylinder 15 drives level-one sleeve piston 16 and two-level sleeve
Piston 17, which moves downward, returns to original position, and stops in material-extruding chamber attemperator and tapered ladder tube nozzle preheating device
Coil heater is heated, and automatic cleaning link is finally entered.
Three, when automatic cleaning, the valve 31 on water pipe 32 is opened, pressure flow enters melting material by rotary nozzle 30 at this time
High pressure washing is carried out in chamber 1 to it, flowing water is entered in material-extruding chamber 14 by the gate valve 13 opened.Telescoping hydraulic cylinder 15
Work, is moved right by level-one sleeve piston 16 and two-level sleeve piston 17, and water is squeezed in tapered ladder tube nozzle 18
It flows into water tank 33 and recycles out.Finally, telescoping hydraulic cylinder 15 drives level-one sleeve piston 16 and two-level sleeve piston 17
Original position is returned to, cleaning is completed.
Claims (10)
1. a kind of wire squeeze device of orientation chopped carbon fiber enhancing thermoplastic composite, including vertically arranged melting material chamber up and down
(1), it is connected at the top of hopper (3) and melting material chamber (1), it is characterized in that: the internal middle of melting material chamber (1) is equipped with multifunctional stirring device
(34), multifunctional stirring device (34) is fixedly and coaxially connected the output shaft of stirring motor (6)；The bottom of melting material chamber (1) is through gate valve
(13) material-extruding chamber (14) of left and right horizontal arrangement is connected, is horizontally disposed telescoping hydraulic cylinder on the left of material-extruding chamber (14)
(15), the right end of telescoping hydraulic cylinder (15) is connected with level-one sleeve piston (16), level-one sleeve piston (16) outer wall and material extrusion
The inner wall of chamber (14) is slidably and sealingly connected with, and two-level sleeve piston (17) and level-one sleeve piston (16) are coaxially connected；Material-extruding chamber
(14) right end outlet is coaxially connected and is connected to tapered ladder tube nozzle (18), has inside tapered ladder tube nozzle (18)
Multistage tapering type ladder pipe (35) from left to right, the internal diameter of the pipeline of tapering type ladder pipe (35) successively successively decrease from left to right and
Left and right length is successively successively decreased from left to right.
2. the wire squeeze device of orientation chopped carbon fiber enhancing thermoplastic composite according to claim 1, it is characterized in that:
Coil heater one (24) is surrounded by the outer wall of melting material chamber (1), coil heater one (24) outer wall is enclosed with heat-preservation cotton one
(25)；It is surrounded by coil heater two (26) outside the right side of material-extruding chamber (14) is half side, coil heater two (26) outer wall is enclosed with
Heat-preservation cotton two (27)；Coil heater three (28), coil heater three (28) are surrounded by outside tapered ladder tube nozzle (18)
Outer wall is enclosed with heat-preservation cotton three (29).
3. the wire squeeze device of orientation chopped carbon fiber enhancing thermoplastic composite according to claim 1, it is characterized in that:
Multifunctional stirring device (34) is by level-one stirring rod (7), second level stirring rod (11), spiral feeding flabellum (8), material scraping plate (9),
T-type stirring rod (10) composition, second level stirring rod (11) are fixedly and coaxially connected level-one stirring rod (7) lower end, on level-one stirring rod (7)
End be fixedly and coaxially connected stirring motor (6), be sequentially arranged with from top to bottom on level-one stirring rod (7) spiral feeding flabellum (8),
Material scraping plate (9) and T-type stirring rod (10) are equipped with spiral material extrusion flabellum (12) on second level stirring rod (11).
4. the wire squeeze device of orientation chopped carbon fiber enhancing thermoplastic composite according to claim 1, it is characterized in that:
Tapering type ladder pipe (35) is 4~8 grades, the tapering type ladder pipe in the left side in two adjacent tapering type ladder pipes (35) of left and right
(35) and the internal diameter ratio of the tapering type ladder pipe (35) on right side is 1.3~1.5, the tapering type ladder pipe (35) in left side and right side
The left and right length ratio of tapering type ladder pipe (35) is 1.1~1.3；The tapering type ladder pipe (35) of the second level from left to right it is interior
Diameter and the outer diameter of two-level sleeve piston (17) match.
5. the wire squeeze device of orientation chopped carbon fiber enhancing thermoplastic composite according to claim 1, it is characterized in that:
The external right side of tapered ladder tube nozzle (18) is sequentially arranged with chill roll, parcel cylinder (22), and parcel cylinder (22) is by parcel motor
(23) rotation is driven.
6. the wire squeeze device of orientation chopped carbon fiber enhancing thermoplastic composite according to claim 1, it is characterized in that:
Rotating sprinkler (30) protrudes into melting material chamber (1) from top, and rotating sprinkler (30) connects water pipe (32) one end, and water pipe (32) is another
One end connects water tank (33), and water pipe (32) is equipped with valve (31), and water tank (33) is located at the right side of tapered ladder tube nozzle (18)
Bring out the lower section of mouth.
7. the wire squeeze device of orientation chopped carbon fiber enhancing thermoplastic composite according to claim 1, it is characterized in that:
The top of hopper (3) is equipped with conveyer belt (4), and conveyer belt (4) is driven by transport motor (5).
8. a kind of wire squeeze side of the wire squeeze device of orientation chopped carbon fiber enhancing thermoplastic composite as claimed in claim 2
Method, it is characterized in that having follow steps:
A, closing gate valve (13), thermoplastic resin matrix and chopped carbon fiber silk send raw material to hopper (3), and raw material enters melting material chamber
(1) after, coil heater one (24) heats melting material chamber (1), and coil heater one (24) is kept the temperature, while stirring electricity
Machine (6) drives multifunctional stirring axis (34) to be rotated；
B, when chopped carbon fiber silk and thermoplastic resin matrix after mixing, coil heater one (24) stop heating, together
When open gate valve (13), it is downward from melting material chamber (1) that uniformly mixed chopped carbon fiber is enhanced melt body by multifunctional stirring axis (34)
It is pushed into material-extruding chamber (14)；
C, telescoping hydraulic cylinder (15) works, and level-one sleeve piston (16) and two-level sleeve piston (17) is driven to push from left to right
The melt body material mixed carries out wire squeeze, coil heater two (26) and coil heater three (28) heating, heat-preservation cotton two
(27) it is kept the temperature with heat-preservation cotton three (29)；
D, telescoping hydraulic cylinder (15) driving level-one sleeve piston (16) and two-level sleeve piston (17) move downward and return to original position.
9. wire squeeze method according to claim 8, it is characterized in that: in step C, it is external in tapered ladder tube nozzle (18)
Right side be sequentially arranged with chill roll, parcel cylinder (22), when the chopped carbon fiber of melting enhances melt body from tapered ladder tube nozzle
(18) after being squeezed out to the right in, the chill roll cooling equipped with cold water is passed sequentially through, chopped carbon fiber enhancing silk material (21) is formed, by disk
Silk cylinder (22) carries out curled hair collection to chopped carbon fiber enhancing silk material (21).
10. wire squeeze method according to claim 9, it is characterized in that: protruding into rotary nozzle (30) after the completion of curled hair is collected
It is rinsed with clear water at the top of melting material chamber (1), is opened simultaneously gate valve (13), clear water enters in material-extruding chamber (14), stretches
Contracting formula hydraulic cylinder (15) work, level-one sleeve piston (16) and two-level sleeve piston (17) move right, by water from tapered ladder
It squeezes out and is flowed into water tank (33) in tube nozzle (18).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810737602.3A CN109177106B (en) | 2018-07-02 | 2018-07-02 | Device and method for extruding directional short carbon fiber reinforced thermoplastic composite material |
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| CN201810737602.3A CN109177106B (en) | 2018-07-02 | 2018-07-02 | Device and method for extruding directional short carbon fiber reinforced thermoplastic composite material |
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| CN109177106B CN109177106B (en) | 2021-04-20 |
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| CN114083734A (en) * | 2021-11-17 | 2022-02-25 | 中国地质大学（北京） | Preparation device and preparation method of oriented conductive composite material |
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