CN106273060A - A kind of wide cut thermoplasticity prepreg preparation method and preparation hot-pressing roller thereof - Google Patents
A kind of wide cut thermoplasticity prepreg preparation method and preparation hot-pressing roller thereof Download PDFInfo
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- CN106273060A CN106273060A CN201610648169.7A CN201610648169A CN106273060A CN 106273060 A CN106273060 A CN 106273060A CN 201610648169 A CN201610648169 A CN 201610648169A CN 106273060 A CN106273060 A CN 106273060A
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- hot
- pressing roller
- prepreg
- rotating shaft
- heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B15/00—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00
- B29B15/08—Pretreatment of the material to be shaped, not covered by groups B29B7/00 - B29B13/00 of reinforcements or fillers
- B29B15/10—Coating or impregnating independently of the moulding or shaping step
- B29B15/12—Coating or impregnating independently of the moulding or shaping step of reinforcements of indefinite length
Abstract
The invention discloses a kind of wide cut thermoplasticity prepreg preparation method and preparation hot-pressing roller thereof, including hot-pressing roller body and be sleeved on hollow rotating shaft thereon, hot-pressing roller body internal surface is provided with hot-pressing roller zone of heating, hollow rotating shaft two ends are provided with for fixing connection hot-pressing roller body and the end baffle of hot-pressing roller zone of heating, internal closed space is formed by two end baffle, vacuum port it is provided with in end baffle, it is provided with reinforcing plate between hollow rotating shaft and hot-pressing roller zone of heating, reinforcing plate is evenly arranged with multiple circular lightening hole.Preparation method of the present invention combines fusion method and the advantage of membrane process prepreg preparation method, serialization is strong, method realizability is strong, energy utilization rate is high, fibre damage is little, preparation method is prone to industrialization, prepreg is superior in quality, use special hot-pressing roller, it is ensured that the structural stability of hot-pressing roller in wide cut preimpregnation preparation process, do not affect prepreg quality.
Description
[technical field]
The invention belongs to thermoplastic composite prepreg preparing technical field, be specifically related to one work under the high temperature conditions
The preparation method of the wide cut thermoplasticity prepreg made and preparation hot-pressing roller thereof.
[background technology]
The technology of preparing of thermoplastic composite prepreg mainly has solvent method, powder method, membrane process and melt impregnation
Deng, wherein melt impregnation is considered as that most probable realizes industrialized production method.Existing melting method prepreg preparation side
In method, owing to fiber exists shearing radially with resin solution, dipping effect is undesirable, is easily caused fibre damage, Er Qie
In the high-temperature region of 300-400 DEG C, hot-pressing roller is easily deformed, although ensure that the quality of prepreg, but thin film needs to make in advance
Standby, method is complicated, and hot-pressing roller problem on deformation is unresolved.Heat pressure roller device does not has special handling due to itself, along with when using
Between prolongation, in being limited to the weight of hot-pressing roller self and 300-400 DEG C of temperature range, the counter-bending deformability of hot-pressing roller declines,
Cause the prepreg that cannot produce wide cut degree.Being embodied under the high temperature conditions, hot-pressing roller rigidity reduces, due to the heat of wide cut
Pressure roller easily produces deflection deformation so that hot-pressing roller contacts the barometric gradient on line and becomes big with prepreg, and then causes prepreg
The problems such as dipping effect is undesirable, thin and thick skewness, therefore only have the prepreg of the little fabric width of 0.1-30cm the most on the market.
[summary of the invention]
The technical problem to be solved is for above-mentioned deficiency of the prior art, it is provided that a kind of wide cut thermoplastic
Property prepreg preparation method and preparation hot-pressing roller thereof, solve existing preparation method complicated, conventional melt infusion process is to fiber
Damage is big, and hot-pressing roller uses temperature low, the problem that deflection deformation is bigger under the high temperature conditions.
The present invention is by the following technical solutions:
A kind of wide cut thermoplasticity prepreg preparation method, it is characterised in that comprise the following steps:
S1: the fiber cloth of prepackage on sand frame, fiber cloth passes sequentially through drip washing shower nozzle and exsiccator enters pretension roller, to fibre
Wei Bu is fixed and pretension；
The resin of S2: extrusion die extrusion is prepared at glued membrane and is carried out secondary distribution calendering between roller and hot-pressing roller, obtains pre-
Determine the resin film of thickness and width；
S3: the resin film of preparation in step S2 is sticked to hot-pressing roller surface, enters impregnation stage and step S1 pretension
Fiber cloth dipping on roller, dipping passes sequentially through the cooling registration roller cooling equipped with deionized water after terminating, edge cutting machine is cut out
Limit, prepares the prepreg of requirement finally by winder rolling.
Further, in described step S2, it is 0.025-0.075mm that glued membrane prepares gap between roller and hot-pressing roller, hot pressing
The pressure sensor device for detecting prepreg dipping effect it is provided with, the pressure model of described pressure sensor device in the rotating shaft of roller
Enclose for 0.1-50MPa.
Further, in described step S3, described glued membrane is prepared the direction of motion of roller nearly prepreg end and is moved with prepreg
In opposite direction, the direction of motion of described hot-pressing roller nearly prepreg end is identical with the prepreg direction of motion.
Further, described sand frame, pretension roller, glued membrane prepare roller, hot-pressing roller, cooling registration roller and the rotation of wrap-up
Linear velocity is identical, and linear velocity is 0.1-3m/s.
Further, described fiber cloth includes glass-fiber-fabric, carbon cloth and aryl fiber cloth, including unidirectional, plain weave and tiltedly
Pattern fabric, described exsiccator uses hot-air, nitrogen or infrared is dried；Described drip washing shower nozzle can spray water, ethanol, acetone
Or butanone；The resin of described extrusion die extrusion is polyether-ether-ketone, polyphenylene sulfide, polysulfones or TPI.
One prepares described wide cut thermoplasticity prepreg hot-pressing roller, including hot-pressing roller body and hollow rotating shaft, described heat
Pressure roller body fits is on hollow rotating shaft, and described hot-pressing roller body internal surface is provided with hot-pressing roller zone of heating, described hollow rotating shaft
Two ends are provided with for fixing connection described hot-pressing roller body and the end baffle of hot-pressing roller zone of heating, by two end baffle
Form internal closed space, described end baffle is provided with vacuum port, is provided with between hollow rotating shaft and hot-pressing roller zone of heating
Reinforcing plate, reinforcing plate is evenly arranged with multiple circular lightening hole, and the axial length of hot-pressing roller body and hot-pressing roller zone of heating is 1
～2m.
Further, described hot-pressing roller zone of heating inner surface radial direction uniform welding is provided with the reinforcement of loop configuration, uses
In the described reinforcing plate of fixing connection, described hollow rotating shaft is provided with the positioning sleeve for affixed described reinforcing plate, described location
Set is arranged at step protruding in the middle part of described hollow rotating shaft, in described reinforcing plate, positioning sleeve, end baffle and hollow rotating shaft
The heart is located along the same line.
Further, the outer surface of described hot-pressing roller zone of heating is along the circumferential direction evenly arranged with spiral helicine heating tank,
Being equipped with electrical heating wire in described heating tank, described electrical heating wire is by being arranged on brush and the external electric at hollow rotating shaft two ends
Connect.
Further, being provided with cold water pipes in described hollow rotating shaft, described hollow rotating shaft two ends are additionally provided with enhancing plate,
Described enhancing plate is positioned at the outside of end baffle, is fastenedly connected with described end baffle, described hollow rotating shaft and end baffle spiral shell
Stricture of vagina connects.
Further, described hot-pressing roller body and hot-pressing roller zone of heating are the hollow columnar structures of both ends open, institute
State hot-pressing roller body to have at smooth outer surface, and both ends open and be respectively arranged with step-like groove, by described groove and end
Portion's baffle plate is fixing to be connected, and installs for interference fit between described hot-pressing roller body and hot-pressing roller zone of heating.
Compared with prior art, the present invention at least has the advantages that
Preparation method of the present invention combines fusion method prepreg preparation method and the advantage of membrane process prepreg preparation method, first
By resin basis film forming and carry out secondary distribution between film preparation roller and hot-pressing roller, the resin molding after distribution again with fiber
Dipping, it is ensured that the stability of dipping effect, serialization is strong, and method realizability is strong, and energy utilization rate is high, fibre damage is little,
Preparation method is prone to that industrialization, prepreg are superior in quality, and resin is rolled into the molten resin layer of predetermined dimension between two rolls,
This resin bed resin distribution is uniform, the prepreg glue stable content prepared with it, and dipping effect is excellent, during dipping, molten
The resin glued membrane melted is impregnated into inside fibre bundle under the effect of radial pressure, and fibre bundle and resin do not produce along fiber bundle direction
Relative slip, fiber will not rupture, and prepreg will not produce the phenomenons such as burr.
Further, hot-pressing roller simple in construction of the present invention, it is bolted reinforcement and hot-pressing roller, it is easy to processing, adds
Hot spot and main load parts hollow rotating shaft are connected by reinforcing plate, are further ensured that under hot conditions that the mechanics of hot-pressing roller is strong
Degree, prevents hot-pressing roller flexural deformation, and the axial length of hot-pressing roller body and hot-pressing roller zone of heating is in the range of 1～2 meter, it is possible to full
The big wide cut of foot needs, and hot-pressing roller hollow cavity uses vacuum state simultaneously, can effectively stop the heat of hot-pressing roller zone of heating to lead to
Crossing air radiation heating hollow rotating shaft, on the one hand this structure can ensure that the intensity of hollow rotating shaft, on the other hand can effectively save
About electric energy and cooling water.
Further, heating tank is the most circumferentially distributed, and the homogeneity of hot-pressing roller body surface temperature, hot-pressing roller are effectively ensured
Body outer surface is smooth structure, there is not the structures such as screw, connecting sewing, step, it is ensured that the prepreg of preparation smooth
Property, improve product quality, strengthening power when hollow rotating shaft can effectively be rotated by plate passes in end baffle, hot-pressing roller body,
Hot-pressing roller zone of heating, end baffle, reinforcing plate are all compression, and main load unit shaft is operationally Bending Deformation,
By circulating water, countershaft is lowered the temperature, it is ensured that hot-pressing roller zone of heating is the temperature of hollow rotating shaft when 300～400 DEG C of high temperature
Spend relatively low so that hollow rotating shaft has the highest strength and stiffness, bigger Bending Deformation will not be produced, affect prepreg and produce
Raw.Owing to cooling position and heating part bit interval are relatively big, on the basis of proof strength, improve the thermal efficiency, equally distributed subtract
Repeated hole alleviates the deadweight of equipment on the basis of ensureing equipment intensity, increases the effect of intensity, and circular configuration will not produce
Stress concentration point, beneficially equipment stable operation.
Below by drawings and Examples, technical scheme is described in further detail.
[accompanying drawing explanation]
Fig. 1 is preparation method sketch of the present invention；
Fig. 2 is the structural representation of hot-pressing roller of the present invention；
Fig. 3 is the left view of hot-pressing roller of the present invention；
Fig. 4 is the A-A cut-away view of hot-pressing roller of the present invention.
Wherein: 1. sand frame；2. drip washing shower nozzle；3. exsiccator；4. pretension roller；5. glued membrane prepares roller；6. hot-pressing roller；7. cooling
Registration roller；8. edge cutting machine；9. winder；10. extrusion die；6-1. hot-pressing roller body；6-2. hot-pressing roller zone of heating；6-3. heating
Groove；6-4. end baffle；6-5. reinforcement；6-6. reinforcing plate；6-7. positioning sleeve；6-8. round nut；6-9. strengthens plate；6-10.
Hollow rotating shaft；6-11. cooling water channel；6-12. brush；6-13. fixing bolt；6-14. lightening hole；6-15. vacuum hole.
[detailed description of the invention]
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " is installed ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be fixing connection, it is also possible to be to removably connect, or be integrally connected；Can
To be mechanical connection, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, Ke Yishi
The connection of two element internals.For the ordinary skill in the art, can understand that above-mentioned term is at this with concrete condition
Concrete meaning in invention.
Referring to shown in Fig. 1, one wide cut thermoplasticity prepreg preparation method of the present invention comprises the following steps:
S1: pre-install the fiber cloth of 1-2m on sand frame 1, fiber cloth passes sequentially through drip washing shower nozzle 2 and exsiccator 3 enters pretension
Roller 4, is fixed fiber cloth and pretension；
The resin of S2: extrusion die 10 extrusion is prepared at glued membrane and is rolled between roller 5 and hot-pressing roller 6, obtains predetermined thickness
Degree and the resin film of width；
S3: the resin film of preparation in step S2 is sticked to hot-pressing roller 6 surface, enters impregnation stage and step S1 pretension
Fiber cloth dipping on roller 4, dipping passes sequentially through that the cooling registration roller 7 equipped with deionized water cools down, edge cutting machine 8 is carried out after terminating
Cutting edge, prepares the prepreg of requirement finally by winder 9 rolling.
Particularly as follows:
1, on sand frame, pre-install the fiber cloth of 1-2m, preferably 1.2m, fiber cloth selectable one-way, plain weave, twill etc..
2, above-mentioned fiber cloth can be glass-fiber-fabric, carbon cloth, aryl fiber cloth etc..
3, the width of fiber cloth should be slightly less than the width of hot-pressing roller 6, typically reduces 10-15cm on the width of hot-pressing roller 6.
4, fiber cloth passes sequentially through drip washing shower nozzle 2 and exsiccator 3.
5, drip washing shower nozzle 2 can pass through the organic solvents such as spray water, ethanol, acetone or butanone.If merely to going out fibre
The impurity on dimension cloth surface, then may select and use deionized water drip washing.If for some system, needing to remove the starching of fiber surface
Agent, then need to use organic solvent.If water and organic solvent are according to certain ratio mixing, then going out fiber surface sizing agent
On the basis of, owing to solvent containing deionized water, can ensure that the safety of working environment the most to a certain extent.
6, exsiccator 3 can be hot air drying, including air or nitrogen；It can also be infrared drying.
7, immersing pretension roller 4 by the fiber cloth after exsiccator 3, pretension roller 4 plays anchoring fiber cloth and provides pretension
The effect of power.
8, resin extruded die head 10 is connected with extruder.Polyether-ether-ketone, polyphenylene sulfide, polysulfones or thermoplastic poly can be extruded
One in acid imide, it is possible to extrude other thermoplastic resins.By selecting resin alloy system, properties of product can ensured
On the basis of cost-effective.Such as, the cost of polyether-ether-ketone is significantly larger than polyphenylene sulfide, by 10% polyphenylene sulfide and polyether-ether-ketone
Mixing, can significantly reduce cost of material on the basis of ensureing the strength of materials.
9, two extrusion dies lay respectively at glued membrane and prepare between roller 5 and hot-pressing roller 6.The resin of die head extrusion is in glued membrane system
For carrying out secondary distribution between roller 5 and hot-pressing roller 6, obtain the resin film of predetermined thickness and width.Roller 5 He is prepared by glued membrane
Behind gap between hot-pressing roller 6, resin will stick to the surface of hot-pressing roller 6, impregnates with prepreg.
10, having pressure sensor device in the rotating shaft of hot-pressing roller 6, by controlling the pressure between two hot-pressing rollers 6, detection is pre-
The dipping effect of leaching material；Preferably pressure control range is 0.1-50MPa, both can ensure that the dipping effect of prepreg, and again will not
Because pressure is excessive causes the problem such as gummosis, fiber orientation.
11, the gap that glued membrane is prepared between roller 5 and hot-pressing roller 6 is controlled by automatic equipment, prepares roller 5 by controlling glued membrane
And the gap between hot-pressing roller 6, the glue content of prepreg can be controlled to a certain extent；Preferably controlling gap is 0.025-
0.075mm。
12, the direction of motion of the nearly prepreg end that glued membrane prepares roller 5 is contrary with the prepreg direction of motion.
13, the direction of motion of the nearly prepreg end of hot-pressing roller 6 is identical with the prepreg direction of motion.The gap of hot-pressing roller is adjustable
Control, gap determines the dipping effect of prepreg and the glue content of prepreg.Gap is the least, then pressure is the biggest, the leaching of prepreg
Stain effect is the best.
14, identical with the direction of motion of fiber cloth and movement velocity due to hot-pressing roller 6, therefore during whole, fiber
Cloth, only by pressure radially, will not produce damage to fiber, and prepreg will not produce the phenomenons such as burr.
15, the prepreg walked out from hot-pressing roller 6 immerses cooling registration roller 7.
16, chill roll plays cooling, location and fastening effect, and the cooling medium of cooling registration roller 7 is deionized water.
17, hot-pressing roller 6 and cooling registration roller 7 according to the actual requirements, can be one group or many groups.
18, after by cooling registration roller 7, prepreg cutting edge at edge cutting machine 8, remove leftover pieces.
19, prepreg enters winder 9 rolling, has both obtained product.
20, in overall procedure, sand frame 1, pretension roller 4, glued membrane prepare roller 5, hot-pressing roller 6, cooling registration roller 7 and rolling dress
Put 9 linear velocity identical；Linear velocity set point is 0.1-3m/s.
During this method preparation preimpregnation, the molten resin on extruder basis first passes through resin extruded die head 10 to be carried out
Pre-dispersed, obtain the resin molding of certain specification.Then this resin molding prepares roller 5 and hot-pressing roller 6 by glued membrane, two rollers it
Between resin molding carried out secondary extrusion, form the thin film of one layer of specific standard and paving be attached to the surface of hot-pressing roller 6, hot-pressing roller 6 table
The resin thin film layer in face will impregnate in fiber cloth, and the most prepared dipping effect is good, fibre damage is little, resin distribution is uniform
Prepreg.
Embodiment 1
Continuously unidirectional glass fibre selected by glass fibre, and polyphenylene sulfide selects the pure material of low viscosity polyphenylene sulfide.Spray with butanone
Mist drip washing fiber cloth remove impurity, infrared lamp baking fiber is except solvent, and the linear velocity in package unit is all set as 0.5m/s, glued membrane system
The temperature of standby rod 5 and hot-pressing roller 6 is set as 330 DEG C, and the hollow rotating shaft inner cooling water flow of hot-pressing roller 6 is 8L/min, glued membrane system
Standby gap between rod 5 and hot-pressing roller 6 is set as that 0.051mm, hot pressing roll gap pressure are set as 15MPa, cooling registration roller 7 goes from
The flow of sub-water is 15L/min.Can prepare glue content is 60%, the prepreg that dipping effect is good.This prepreg performance is pressed
Test its performance according to GB/T1463-2005, GB 1447-2005 and GB 1449-2005, and contrast with virgin resin performance,
It is listed in the table below:
| Polyphenylene sulfide | Fiberglass reinforced polyphenylene sulfide | |
| Density (g/cm3) | 1.34 | 2.04 |
| Hot strength (MPa) | 85 | 1020 |
| Bending strength (MPa) | 140 | 1180 |
| Bending modulus (GPa) | 3.9 | 45.5 |
Refer to shown in Fig. 2 to Fig. 4, the invention discloses a kind of work under the high temperature conditions pre-for preparing thermoplasticity
The big span hot-pressing roller of leaching material, including: hot-pressing roller body 6-1, hot-pressing roller zone of heating 6-2, reinforcing plate 6-6, band refrigerating function
Hollow rotating shaft 6-10, end baffle 6-4, end baffle has vacuum port 6-15, and equipment can keep hot-pressing roller during using
The vacuum that internal cavities is enough.
Particularly as follows: hot-pressing roller zone of heating 6-2 is arranged on the inner surface of hot-pressing roller body 6-1, hot-pressing roller body 6-1 and hot pressing
Roller zone of heating 6-2 is fastenedly connected with end baffle 6-4 being arranged on hollow rotating shaft 6-10 two ends with fixing bolt 6-13 respectively, group
Become complete body, the axial length of described hot-pressing roller body 6-1 and hot-pressing roller zone of heating 6-2 to be one to two meters, choose two reinforcements
Plate 6-6 is respectively symmetrically to be sleeved on hollow rotating shaft 6-10 and fix with hot-pressing roller zone of heating 6-2 and is connected；In the middle part of hollow rotating shaft 6-10
Being correspondingly arranged on two positioning sleeve 6-7, hollow rotating shaft 6-10 is connected by positioning sleeve 6-7 is fixing with reinforcing plate 6-6.Hollow rotating shaft
The inside of 6-10 is connected with cold water pipes 6-11, and countershaft is lowered the temperature, it is ensured that the strength and stiffness of rotating shaft during high temperature, it is possible to meet
The job demand of big span.
Wherein, hot-pressing roller body 6-1 is the hollow columnar structures of both ends open, two openings of hot-pressing roller body 6-1
End is in step-like.The step-like groove of hot-pressing roller body 6-1 port is used for connecting fixing hot-pressing roller body 6-1 and end baffle
6-4, both are connected by fixing bolt 6-13.Hot-pressing roller body 6-1 outer surface is smooth structure, do not exist screw, connecting sewing,
The structures such as step, it is ensured that the planarization of the prepreg of preparation.
Hot-pressing roller zone of heating 6-2 outer ring is interference fit with the inner ring of hot-pressing roller body 6-1, outside hot-pressing roller zone of heating 6-2
Helical form heating tank 6-3 is uniformly carved at circumferencial direction in surface, is equipped with electrical heating wire in heating tank 6-3, and heating wire circuit passes through
The brush 6-12 being fixed on hollow rotating shaft 6-10 is connected with power current.Hot-pressing roller zone of heating 6-2 is the hollow circle of both ends open
Column structure, hot-pressing roller zone of heating 6-2 two ends are connected by fixing bolt 6-13 with end baffle 6-4.Ensureing equipment intensity
On the basis of alleviate equipment self-weight.The radially uniform multiple reinforcement 6-being welded with annular at hot-pressing roller zone of heating 6-2 inner ring
5, each reinforcement 6-5 correspondence is connected by fixing bolt 6-13 with hot-pressing roller reinforcing plate 6-6, enters one by reinforcing plate
Step ensures the mechanical strength of hot-pressing roller under hot conditions, prevents hot-pressing roller flexural deformation.
The center of reinforcing plate 6-6, positioning sleeve 6-7 and hollow rotating shaft 6-10 three is on one wire.Reinforcing plate 6-6 is circular
Flat board, is circumferentially evenly distributed with the lightening hole 6-14 of multiple circular configuration in each reinforcing plate 6-6, and lightening hole 6-14 plays
Alleviate weight, increase the effect of intensity, and circular configuration will not produce stress concentration point, beneficially equipment stable operation.Strengthen
Being connected by fixing bolt 6-13 between plate 6-6 with positioning sleeve 6-7, positioning sleeve 6-7 is threaded connection with hollow rotating shaft 6-10.
There is the step of projection hollow rotating shaft 6-10 middle part, it is simple to determine the position of positioning sleeve 6-7 so that positioning sleeve 6-7 can consolidate
It is scheduled on raised position.
Preferably, hollow rotating shaft 6-10 is threaded connection with end baffle 6-4, in the outside of end baffle, has enhancing
Plate 6-9 is connected by fixing bolt 6-13 with it.Strengthen plate 6-9 primarily to when effectively being rotated by hollow rotating shaft 6-10
Power passes in end baffle 6-4.
Circumferentially it is evenly distributed with for installing fixing bolt 6-on end baffle 6-4, reinforcing plate 6-6 and enhancing plate 6-9
The hole of 13.
Embodiment 2
Use hot-pressing roller of the present invention to prepare prepreg, when hot-pressing roller requires heat to uniform temperature, beat successively
Open the cooling water system of heating power supply and hollow rotating shaft.The heating wire being positioned at heating tank 6-3 produces heat, and conduction of heat is to hot pressing
The surface of roller body 1, owing to heating tank 6-3 is the most circumferentially distributed, therefore can effectively ensure hot-pressing roller body 6-1 surface temperature
The homogeneity of degree.After hot-pressing roller 6-1 reaches predetermined temperature, preparing prepreg, the power putting on hot-pressing roller surface uniformly transfers
To reinforcing plate 6-6 and end baffle 6-4, and then conduct to hollow rotating shaft 6-10.In 300-400 DEG C of temperature range, steel is
Compressed shape variable the least, prepreg will not be produced impact, and reinforcing plate 6-6 and end baffle 6-4 are in whole work process
In the power that is subject to be pressure, the least when compress variation is between 300-400 DEG C, the need of prepreg manufacturing methods can be met
Ask.And hollow rotating shaft 6-10 is connected with cooling water always, will not at high temperature work, the most also will not produce bigger Curved
Become, the most operationally can ensure that the rigidity of himself, big deflection deformation will not occur.Both combine, it is ensured that whole
The surface linear degree of hot-pressing roller body 6-1 in individual work process.And then ensure the dipping effect of prepreg and width
Thickness and resin distribution situation.
Owing to the cavity of this hot-pressing roller is vacuum chamber, therefore heat to the thermal loss within hot-pressing roller only have reinforcement and
The conduction of heat of end baffle, without conduction of heat in whole cavity, thermal loss computing formula is as follows:
Wherein q is thermal loss amount, and λ is heat transfer coefficient, T1And T2For the temperature in respectively two faces, referred to herein as hot pressing
Roller body and the absolute temperature of hollow rotating shaft, r and a is the diameter of hot-pressing roller body and hollow rotating shaft, B be jump in temperature coefficient with
The ratio of gas molecule mean free path, about constant.
Calculate according to formula (1), same set of equipment, for vacuum and antivacuum system,Wherein q1And λ1It is true
Thermal loss under empty condition and thermal conductivity coefficient, q2And λ2Heat seen from the thermal loss under condition of normal pressure and thermal conductivity coefficient
Loss is directly proportional to heat transfer coefficient, with data instance in literary composition, at normal atmospheric pressure, λ2=4.75/w.m-2.k-1, and vacuum
Degree is thermal conductivity coefficient λ during 0.01Pa1=1.0/w.m-2.k-1, it can thus be appreciated that q1/q2=21.05%, i.e. because of heat radiation part
Energy can reduce 21.05%, and corresponding cooling water amount can reduce by 21.05%.
Above content is only the technological thought that the present invention is described, it is impossible to limit protection scope of the present invention with this, every presses
The technological thought proposed according to the present invention, any change done on the basis of technical scheme, each fall within claims of the present invention
Protection domain within.
Claims (10)
1. a wide cut thermoplasticity prepreg preparation method, it is characterised in that comprise the following steps:
S1: pre-install fiber cloth on sand frame (1), described fiber cloth passes sequentially through drip washing shower nozzle (2) and exsiccator (3) enters pretension
Roller (4), is fixed and pretension described fiber cloth；
The resin that S2: extrusion die (10) is extruded is prepared at glued membrane and is carried out secondary distribution calendering between roller (5) and hot-pressing roller (6),
Obtain the resin film of predetermined thickness and width；
S3: the described resin film of preparation in step S2 is sticked to described hot-pressing roller (6) surface, enters impregnation stage with described
Fiber cloth dipping in step S1 pretension roller (4), it is cold that dipping passes sequentially through the cooling registration roller (7) equipped with deionized water after terminating
But, edge cutting machine (8) carry out cutting edge, prepare the prepreg of requirement finally by winder (9) rolling.
A kind of wide cut thermoplasticity prepreg preparation method the most according to claim 1, it is characterised in that described step S2
In, it is 0.025-0.075mm that glued membrane prepares gap between roller (5) and hot-pressing roller (6), and the rotating shaft of described hot-pressing roller (6) is arranged
Having the pressure sensor device for detecting prepreg dipping effect, the pressure limit of described pressure sensor device is 0.1-50MPa.
A kind of wide cut thermoplasticity prepreg preparation method the most according to claim 1, it is characterised in that described step S3
In, the direction of motion that described glued membrane prepares the nearly prepreg end of roller (5) is contrary with the prepreg direction of motion, and described hot-pressing roller (6) is near
The direction of motion of prepreg end is identical with the prepreg direction of motion.
A kind of wide cut thermoplasticity prepreg preparation method the most according to claim 1, it is characterised in that described sand frame (1),
Pretension roller (4), glued membrane prepare roller (5), hot-pressing roller (6), cooling registration roller (7) identical with the rotational line speed of wrap-up (9),
Described linear velocity is 0.1-3m/s.
A kind of wide cut thermoplasticity prepreg preparation method the most according to claim 1, it is characterised in that described fiber cloth is
Glass-fiber-fabric, carbon cloth or aryl fiber cloth, including unidirectional, plain weave and twill fabric, described exsiccator (3) use hot-air,
Nitrogen or infrared be dried；Described drip washing shower nozzle (2) can spray water, ethanol, acetone or butanone；Described extrusion die (10) squeezes
The resin gone out is polyether-ether-ketone, polyphenylene sulfide, polysulfones or TPI.
6. prepare described wide cut thermoplasticity prepreg hot-pressing roller for one kind, it is characterised in that: include hot-pressing roller body (6-1) and sky
Heart rotating shaft (6-10), described hot-pressing roller body (6-1) is sleeved on hollow rotating shaft (6-10), in described hot-pressing roller body (6-1)
Surface configuration has hot-pressing roller zone of heating (6-2), described hollow rotating shaft (6-10) two ends to be provided with for the described hot pressing of fixing connection
The end baffle (6-4) of roller body (1) and hot-pressing roller zone of heating (6-2), forms internal closing by two end baffle (6-4)
Space, described end baffle (6-4) is provided with vacuum port (6-15), described hollow rotating shaft (6-10) and hot-pressing roller zone of heating
(6-2) it is provided with reinforcing plate (6-6) between, described reinforcing plate (6-6) is evenly arranged with multiple circular lightening hole (6-14), institute
The axial length stating hot-pressing roller body (6-1) and hot-pressing roller zone of heating (6-2) is 1～2m.
A kind of hot-pressing roller for preparing wide cut thermoplasticity prepreg the most according to claim 6, it is characterised in that: described
Hot-pressing roller zone of heating (6-2) inner surface radial direction uniform welding is provided with the reinforcement (6-5) of loop configuration, connects institute for fixing
State reinforcing plate (6-6), described hollow rotating shaft (6-10) be provided with the positioning sleeve (6-7) for affixed described reinforcing plate (6-6),
Described positioning sleeve (6-7) is arranged at the step that described hollow rotating shaft (6-10) middle part is protruding, described reinforcing plate (6-6), location
Set (6-7), end baffle (6-4) and hollow rotating shaft (6-10) are centrally located on same straight line.
A kind of hot-pressing roller for preparing wide cut thermoplasticity prepreg the most according to claim 6, it is characterised in that: described
The outer surface of hot-pressing roller zone of heating (6-2) is along the circumferential direction evenly arranged with spiral helicine heating tank (6-3), described heating tank
(6-3) be equipped with electrical heating wire in, described electrical heating wire by be arranged on the brush (6-12) at hollow rotating shaft (6-10) two ends with
External electrical connections.
A kind of hot-pressing roller for preparing wide cut thermoplasticity prepreg the most according to claim 6, it is characterised in that: described
Being provided with cold water pipes (6-11) in hollow rotating shaft (6-10), described hollow rotating shaft (6-10) two ends are additionally provided with enhancing plate (6-
9), described enhancing plate (6-9) is positioned at the outside of end baffle (6-4), is fastenedly connected with described end baffle (6-4), described sky
Heart rotating shaft (6-10) is threadeded with end baffle (6-4).
A kind of hot-pressing roller for preparing wide cut thermoplasticity prepreg the most according to claim 6, it is characterised in that: institute
State hot-pressing roller body (6-1) and hot-pressing roller zone of heating (6-2) be the hollow columnar structures of both ends open, described hot-pressing roller this
Body (6-1) has at smooth outer surface, and both ends open and is respectively arranged with step-like groove, by described groove and end baffle
(6-4) fixing connection, installs for interference fit between described hot-pressing roller body (6-1) and hot-pressing roller zone of heating (6-2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610648169.7A CN106273060B (en) | 2016-08-09 | 2016-08-09 | Hot-pressing roller is used in a kind of wide cut thermoplasticity preimpregnation preparation method for material and its preparation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610648169.7A CN106273060B (en) | 2016-08-09 | 2016-08-09 | Hot-pressing roller is used in a kind of wide cut thermoplasticity preimpregnation preparation method for material and its preparation |
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| CN106273060A true CN106273060A (en) | 2017-01-04 |
| CN106273060B CN106273060B (en) | 2019-03-29 |
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| CN201610648169.7A Active CN106273060B (en) | 2016-08-09 | 2016-08-09 | Hot-pressing roller is used in a kind of wide cut thermoplasticity preimpregnation preparation method for material and its preparation |
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| CN (1) | CN106273060B (en) |
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| CN112590057A (en) * | 2021-03-03 | 2021-04-02 | 山东国维复合材料科技有限公司 | Continuous ultrathin unidirectional tape pre-dipping machine based on thermoplastic resin prepreg |
| CN113352501A (en) * | 2021-06-23 | 2021-09-07 | 四川兴宇航科技有限公司 | Production process and equipment for carbon fiber fabric reinforced PPS prepreg |
| CN113815246A (en) * | 2021-11-18 | 2021-12-21 | 北京玻钢院复合材料有限公司 | Preparation method and preparation device of variable reinforcement hot-melt prepreg |
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| CN113815246A (en) * | 2021-11-18 | 2021-12-21 | 北京玻钢院复合材料有限公司 | Preparation method and preparation device of variable reinforcement hot-melt prepreg |
| CN115105409A (en) * | 2022-08-26 | 2022-09-27 | 江苏博生医用新材料股份有限公司 | Medical rubber plug punching and edge removing device |
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