CN106273060B - Hot-pressing roller is used in a kind of wide cut thermoplasticity preimpregnation preparation method for material and its preparation - Google Patents
Hot-pressing roller is used in a kind of wide cut thermoplasticity preimpregnation preparation method for material and its preparation Download PDFInfo
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- CN106273060B CN106273060B CN201610648169.7A CN201610648169A CN106273060B CN 106273060 B CN106273060 B CN 106273060B CN 201610648169 A CN201610648169 A CN 201610648169A CN 106273060 B CN106273060 B CN 106273060B
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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
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Abstract
The invention discloses a kind of wide cut thermoplasticity preimpregnation preparation method for material and its preparation hot-pressing rollers, hollow rotating shaft including hot pressing roller body and suit on it, hot-pressing roller body internal surface is provided with hot-pressing roller heating layer, hollow rotating shaft both ends are provided with the end baffle for being fixedly connected with hot pressing roller body and hot-pressing roller heating layer, internal closed space is formed by two end baffles, vacuum port is provided in end baffle, it is provided with stiffening plate between hollow rotating shaft and hot-pressing roller heating layer, multiple round lightening holes are evenly arranged in stiffening plate.The advantages of preparation method combination fusion method of the present invention and membrane process preimpregnation preparation method for material, serialization is strong, method realizability is strong, energy utilization rate is high, fibre damage is small, preparation method is easy to industrialize, prepreg is superior in quality, using special hot-pressing roller, guarantees the structural stability of hot-pressing roller in wide cut preimpregnation preparation process, do not influence prepreg quality.
Description
[technical field]
The invention belongs to thermoplastic composite prepreg preparation technical fields, and in particular to a kind of work under the high temperature conditions
The preparation method and its preparation hot-pressing roller of the wide cut thermoplasticity prepreg of work.
[background technique]
The technology of preparing of thermoplastic composite prepreg mainly has solvent method, powder method, membrane process and melt impregnation
Deng, wherein melt impregnation be considered as most probable realize industrialized production method.Existing melting method prepreg preparation side
In method, since fiber and resin solution have radial shearing, dipping effect is undesirable, is easy to cause fibre damage, Er Qie
In 300-400 DEG C of high-temperature region, hot-pressing roller is easily deformed, although ensure that the quality of prepreg, film needs system in advance
Standby, method is complicated, and hot-pressing roller problem on deformation is unresolved.Heat pressure roller device is not since itself has specially treated, when with using
Between extension, be limited to the counter-bending deformability decline of hot-pressing roller in the weight and 300-400 DEG C of temperature range of hot-pressing roller itself,
Lead to not the prepreg for producing wide cut degree.It is embodied under the high temperature conditions, hot-pressing roller rigidity reduces, due to the heat of wide cut
Pressure roller is easy to produce deflection deformation, so that hot-pressing roller becomes larger with the barometric gradient in prepreg contact line, and then leads to prepreg
The problems such as dipping effect is undesirable, thin and thick is unevenly distributed, therefore there was only the prepreg of the small breadth of 0.1-30cm on the market at present.
[summary of the invention]
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that providing a kind of wide cut thermoplastic
Property preimpregnation preparation method for material and its preparation use hot-pressing roller, solve that existing preparation method is complicated, and conventional melt infusion process is to fiber
Damage is big, and hot-pressing roller is low using temperature, under the high temperature conditions the larger problem of deflection deformation.
The invention adopts the following technical scheme:
A kind of wide cut thermoplasticity preimpregnation preparation method for material, which comprises the following steps:
S1: the fiber cloth pre-installed on sand frame, fiber cloth passes sequentially through elution spray head and drier enters pre-tightening mechanism, to fibre
Wei Bu is fixed and pre-tightens；
S2: the resin that extrusion die squeezes out prepares progress secondary distribution calendering between roller and hot-pressing roller in glue film, obtains pre-
Determine the resin film of thickness and width；
S3: being adhered to hot pressing roller surface for the resin film prepared in step S2, pre-tightens into impregnation stage and step S1
Fiber cloth on roller impregnates, and the cooling registration roller cooling equipped with deionized water is passed sequentially through after dipping, edge cutting machine is cut out
Side winds the prepreg for being made and requiring finally by winder.
Further, in the step S2, it is 0.025-0.075mm, hot pressing that glue film, which prepares gap between roller and hot-pressing roller,
The pressure sensor device for detecting prepreg dipping effect, the pressure model of the pressure sensor device are provided in the shaft of roller
It encloses for 0.1-50MPa.
Further, in the step S3, the glue film prepares the direction of motion at the nearly prepreg end of roller and prepreg moves
Contrary, the direction of motion at the nearly prepreg end of the hot-pressing roller is identical as the prepreg direction of motion.
Further, the sand frame, pre-tightening mechanism, glue film prepare the rotation of roller, hot-pressing roller, cooling registration roller and wrap-up
Linear velocity is identical, linear velocity 0.1-3m/s.
Further, the fiber cloth includes glass-fiber-fabric, carbon cloth and aryl fiber cloth, including unidirectional, plain weave and tiltedly
Pattern fabric, the drier is using hot-air, nitrogen or infrared is dried；The sprayable water of the elution spray head, ethyl alcohol, acetone
Or butanone；The resin that the extrusion die squeezes out is polyether-ether-ketone, polyphenylene sulfide, polysulfones or thermoplastic polyimide.
It is a kind of to prepare the wide cut thermoplasticity prepreg hot-pressing roller, including hot pressing roller body and hollow rotating shaft, the heat
For pressure roller body fits on hollow rotating shaft, the hot-pressing roller body internal surface is provided with hot-pressing roller heating layer, the hollow rotating shaft
Both ends are provided with the end baffle for being fixedly connected with the hot pressing roller body and hot-pressing roller heating layer, pass through two end baffles
Internal closed space is formed, vacuum port is provided in the end baffle, is provided between hollow rotating shaft and hot-pressing roller heating layer
Stiffening plate, is evenly arranged with multiple round lightening holes in stiffening plate, and the axial length of hot pressing roller body and hot-pressing roller heating layer is 1
~2m.
Further, the hot-pressing roller heating layer inner surface radial direction uniform welding is provided with the reinforcing rib of ring structure, uses
In being fixedly connected with the stiffening plate, the positioning sleeve for the affixed stiffening plate, the positioning are provided on the hollow rotating shaft
Set is set in the middle part of the hollow rotating shaft at the step of protrusion, in the stiffening plate, positioning sleeve, end baffle and hollow rotating shaft
The heart is located along the same line.
Further, the outer surface of the hot-pressing roller heating layer is along the circumferential direction evenly arranged with spiral helicine heating tank,
Electric heating wire is equipped in the heating tank, the electric heating wire passes through the brush and external electric that hollow rotating shaft both ends are arranged in
It connects.
Further, cold water pipes are provided in the hollow rotating shaft, the hollow rotating shaft both ends are additionally provided with reinforcing plate,
The reinforcing plate is located at the outside of end baffle, is fastenedly connected with the end baffle, the hollow rotating shaft and end baffle spiral shell
Line connection.
Further, the hot pressing roller body and hot-pressing roller heating layer are the hollow columnar structures of both ends open, institute
Hot pressing roller body is stated with smooth outer surface, and is respectively arranged with step-like groove at both ends open, passes through the groove and end
Portion's baffle is fixedly connected, and is interference fit installation between the hot pressing roller body and hot-pressing roller heating layer.
Compared with prior art, the present invention at least has the advantages that
The advantages of preparation method combination fusion method preimpregnation preparation method for material of the present invention and membrane process preimpregnation preparation method for material, first
Resin basis is formed a film and carries out secondary distribution between film preparation roller and hot-pressing roller, the resin film after distribution again with fiber
Dipping, ensure that the stability of dipping effect, and serialization is strong, and method realizability is strong, and energy utilization rate is high, fibre damage is small,
Preparation method is easy to industrialize, prepreg is superior in quality, and resin is rolled into the molten resin layer of predetermined dimension between two rolls,
The resin layer resin distribution is uniform, and with the prepreg glue stable content that it is prepared, dipping effect is excellent, during dipping, melts
The resin glue film melted is impregnated into inside fibre bundle under the action of radial pressure, and fibre bundle and resin do not generate along fiber bundle direction
Opposite sliding, phenomena such as fiber will not be broken, and prepreg will not generate flash.
Further, hot pressing roll structure of the present invention is simple, is bolted reinforcing rib and hot-pressing roller, easy to process, adds
Hot spot is connected with main load component hollow rotating shaft by stiffening plate, is further ensured that the mechanics of hot-pressing roller under hot conditions is strong
Degree, prevents hot-pressing roller bending deformation, and the axial length of hot pressing roller body and hot-pressing roller heating layer is within the scope of 1~2 meter, Neng Gouman
The big wide cut of foot needs, while hot-pressing roller hollow cavity uses vacuum state, can effectively prevent the heat of hot-pressing roller heating layer logical
Air radiation heating hollow rotating shaft is crossed, on the one hand this structure can guarantee the intensity of hollow rotating shaft, on the other hand can effectively save
About electric energy and cooling water.
Further, heating tank is uniformly circumferentially distributed, and the homogeneity of hot-pressing roller body surface temperature, hot-pressing roller is effectively ensured
Body outer surface is smooth structure, and there is no the structures such as screw hole, connecting sewing, step, it is ensured that the prepreg of preparation it is smooth
Property, product quality is improved, power when reinforcing plate can effectively rotate hollow rotating shaft passes in end baffle, hot pressing roller body,
Hot-pressing roller heating layer, end baffle, stiffening plate are all compressive deformation, and main load unit shaft is Bending Deformation at work,
By circulating water, cool down to shaft, guarantees the temperature of hot-pressing roller heating layer hollow rotating shaft in 300~400 DEG C of high temperature
Spend it is lower so that hollow rotating shaft have very high strength and stiffness, biggish Bending Deformation will not be generated, influence prepreg production
It is raw.Since cooling position and heating part bit interval are larger, the thermal efficiency is improved on the basis of proof strength, it is equally distributed to subtract
Repeated hole alleviates the self weight of equipment on the basis of guaranteeing equipment intensity, increases the effect of intensity, and circular configuration will not generate
Stress concentration point is conducive to equipment stable operation.
Below by drawings and examples, technical scheme of the present invention will be described in further detail.
[Detailed description of the invention]
Fig. 1 is preparation method schematic diagram of the present invention；
Fig. 2 is the structural schematic diagram 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 framves；2. eluting spray head；3. drier；4. pre-tightening mechanism；5. glue film 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 heating layer；6-3. heating
Slot；6-4. end baffle；6-5. reinforcing rib；6-6. stiffening plate；6-7. positioning sleeve；6-8. round nut；6-9. reinforcing 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.
[specific embodiment]
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood at this with concrete condition
Concrete meaning in invention.
Refering to Figure 1, a kind of wide cut thermoplasticity of present invention preimpregnation preparation method for material the following steps are included:
S1: the fiber cloth of 1-2m is pre-installed on sand frame 1, fiber cloth passes sequentially through elution spray head 2 and drier 3 enters preload
Roller 4, is fixed fiber cloth and pre-tightens；
S2: the resin that extrusion die 10 squeezes out is prepared in glue film to be rolled between roller 5 and hot-pressing roller 6, obtains predetermined thickness
The resin film of degree and width；
S3: being adhered to 6 surface of hot-pressing roller for the resin film prepared in step S2, pre-tightens into impregnation stage and step S1
Fiber cloth on roller 4 impregnates, and the cooling of cooling registration roller 7 equipped with deionized water is passed sequentially through after dipping, edge cutting machine 8 carries out
Cutting edge winds the prepreg for being made and requiring finally by winder 9.
Specifically:
1, the fiber cloth of 1-2m, preferably 1.2m, fiber cloth selectable one-way, plain weave, twill etc. are pre-installed on sand frame.
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, generally reduce 10-15cm on the width of hot-pressing roller 6.
4, fiber cloth passes sequentially through elution spray head 2 and drier 3.
5, elution spray head 2 can pass through the organic solvents such as spray water, ethyl alcohol, acetone or butanone.If merely to fibre of going out
The impurity on cloth surface is tieed up, then may be selected to be eluted with deionized water.If being directed to certain systems, need to remove the starching of fiber surface
Agent is then needed using organic solvent.If water and organic solvent mix according to a certain percentage, in fiber surface sizing agent of going out
On the basis of, due to containing deionized water in solvent, then it can guarantee the safety of working environment to a certain extent.
6, drier 3 can be heated-air drying, including air or nitrogen；It is also possible to infra-red drying.
7, pre-tightening mechanism 4 is immersed by the fiber cloth after drier 3, pre-tightening mechanism 4 plays anchoring fiber cloth and provides preload
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 squeezed out
One of acid imide, also other extrudable thermoplastic resins.By selecting resin alloy system, it can guarantee properties of product
On the basis of save the cost.For example, 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 guaranteeing the strength of materials.
9, two extrusion dies are located at glue film and prepare between roller 5 and hot-pressing roller 6.The resin that die head squeezes out is in glue film system
Secondary distribution is carried out between standby roller 5 and hot-pressing roller 6, obtains the resin film of predetermined thickness and width.5 He of roller is prepared by glue film
Behind gap between hot-pressing roller 6, resin will be adhered to the surface of hot-pressing roller 6, impregnate with prepreg.
10, there is pressure sensor device in the shaft of hot-pressing roller 6, by the pressure between two hot-pressing rollers 6 of control, detection is pre-
Soak the dipping effect of material；It is preferred that pressure control range is 0.1-50MPa, it can not only guarantee the dipping effect of prepreg, but also will not
Because pressure is excessive to lead to gummosis, fiber orientation.
11, glue film prepares the gap between roller 5 and hot-pressing roller 6 and is controlled by automatic equipment, prepares roller 5 by controlling glue film
Gap between hot-pressing roller 6 can control the glue content of prepreg to a certain extent；It is preferred that control gap is 0.025-
0.075mm。
12, glue film prepare the nearly prepreg end of roller 5 the direction of motion it is opposite with the prepreg direction of motion.
13, the direction of motion at the nearly prepreg end of hot-pressing roller 6 is identical as 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 smaller, then pressure is bigger, the leaching of prepreg
Stain effect is better.
14, identical with the direction of motion and movement velocity of fiber cloth due to hot-pressing roller 6, in the whole process, fiber
Phenomena such as cloth only by radial pressure, will not generate damage to fiber, and prepreg will not generate flash.
15, the prepreg walked out from hot-pressing roller 6 immerses cooling registration roller 7.
16, chill roll plays cooling, positioning 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 can be one group or multiple groups according to actual needs.
18, after by cooling registration roller 7, leftover pieces are removed in prepreg cutting edge at edge cutting machine 8.
19, prepreg enters the winding of winder 9, both obtains product.
20, in overall procedure, sand frame 1, pre-tightening mechanism 4, glue film prepare roller 5, hot-pressing roller 6, cooling registration roller 7 and winding dress
Set 9 linear velocity it is identical；Linear velocity setting range is 0.1-3m/s.
During this method preparation preimpregnation, the molten resin on extruder basis passes through resin extruded die head 10 first to be carried out
It is pre-dispersed, obtain the resin film of certain specification.Then the resin film prepares roller 5 and hot-pressing roller 6 by glue film, two rollers it
Between secondary extrusion is carried out to resin film, form the film of a layer specific specification and paving be attached to the surface of hot-pressing roller 6,6 table of hot-pressing roller
The resin thin film layer in face will be impregnated in fiber cloth, and finally obtained dipping effect is good, fibre damage is small, resin distribution is uniform
Prepreg.
Embodiment 1
Glass fibre selects continuously unidirectional glass fibre, and polyphenylene sulfide selects low viscosity polyphenylene sulfide pure material.It is sprayed with butanone
Mist elutes fiber cloth removal of impurities, and infrared lamp toasts fiber and removes solvent, and the linear velocity in package unit is set as 0.5m/s, glue film system
The temperature of standby rod 5 and hot-pressing roller 6 is set as 330 DEG C, and cooling water flow is 8L/min, glue film system in the hollow rotating shaft of hot-pressing roller 6
Gap between standby rod 5 and hot-pressing roller 6 is set as 0.051mm, and hot pressing roll gap pressure is set as 15MPa, gone in cooling registration roller 7 from
The flow of sub- water is 15L/min.It is 60% that glue content, which can be prepared, the good prepreg of dipping effect.This prepreg performance is pressed
Its performance is tested according to GB/T1463-2005, GB 1447-2005 and GB 1449-2005, and is compared with pure resin performance,
It is listed in the table below:
| Polyphenylene sulfide | Fiberglass reinforced polyphenylene sulfide | |
| Density (g/cm3) | 1.34 | 2.04 |
| Tensile strength (MPa) | 85 | 1020 |
| Bending strength (MPa) | 140 | 1180 |
| Bending modulus (GPa) | 3.9 | 45.5 |
Shown in please see Fig. 2 to Fig. 4, the invention discloses one kind work under the high temperature conditions to be used to prepare thermoplasticity pre-
Soak material large span hot-pressing roller, comprising: hot pressing roller body 6-1, hot-pressing roller heating layer 6-2, stiffening plate 6-6, with refrigerating function
Hollow rotating shaft 6-10, end baffle 6-4 have vacuum port 6-15 in end baffle, are able to maintain hot-pressing roller in equipment use process
The enough vacuum degrees of internal cavities.
Specifically: the inner surface of hot pressing roller body 6-1, hot pressing roller body 6-1 and hot pressing is arranged in hot-pressing roller heating layer 6-2
Roller heating layer 6-2 is fastenedly connected with fixing bolt 6-13 with the end baffle 6-4 that the both ends hollow rotating shaft 6-10 are arranged in respectively, group
At complete body, the axial length of the hot pressing roller body 6-1 and hot-pressing roller heating layer 6-2 are one to two meters, choose two reinforcements
Plate 6-6 is respectively symmetrically sleeved on hollow rotating shaft 6-10 and is fixedly connected with hot-pressing roller heating layer 6-2；In the middle part of hollow rotating shaft 6-10
Positioning sleeve 6-7 there are two being correspondingly arranged, hollow rotating shaft 6-10 are fixedly connected by positioning sleeve 6-7 with stiffening plate 6-6.Hollow rotating shaft
The inside of 6-10 is connected with cold water pipes 6-11, cools down to shaft, guarantees the strength and stiffness of shaft when high temperature, can satisfy
The need of work of large 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.Step-like groove at the port hot pressing roller body 6-1 is for being connected and fixed hot pressing roller body 6-1 and end baffle
6-4, the two are connected by fixing bolt 6-13.The hot pressing outer surface roller body 6-1 be smooth structure, there is no screw hole, connecting sewing,
The structures such as step, it is ensured that the planarization of the prepreg of preparation.
The inner ring of the hot-pressing roller outer ring heating layer 6-2 and hot pressing roller body 6-1 are to be interference fitted, outside hot-pressing roller heating layer 6-2
Helical form heating tank 6-3 is uniformly carved in circumferencial direction in surface, and electric heating wire is equipped in heating tank 6-3, and heating wire route passes through
Brush 6-12 and the power being fixed on hollow rotating shaft 6-10 are electrically connected.Hot-pressing roller heating layer 6-2 is the hollow circle of both ends open
Column structure, the hot-pressing roller both ends heating layer 6-2 are connect with end baffle 6-4 by fixing bolt 6-13.Guaranteeing equipment intensity
On the basis of mitigate equipment self-weight.In the radially uniform multiple reinforcing rib 6- for being welded with annular of hot-pressing roller heating layer 6-2 inner ring
5, each reinforcing rib 6-5 correspondence are connect with a stiffening plate 6-6 of hot-pressing roller by fixing bolt 6-13, by stiffening plate into one
Step guarantees the mechanical strength of hot-pressing roller under hot conditions, prevents hot-pressing roller bending deformation.
The center of stiffening plate 6-6, positioning sleeve 6-7 and hollow rotating shaft 6-10 three are on one wire.Stiffening plate 6-6 is circle
Plate, is circumferentially evenly distributed with the lightening hole 6-14 of multiple circular configurations on each stiffening plate 6-6, and lightening hole 6-14 is played
Mitigate weight, increases the effect of intensity, and circular configuration will not generate stress concentration point, be conducive to equipment stable operation.Reinforce
It is connected between plate 6-6 and positioning sleeve 6-7 by fixing bolt 6-13, positioning sleeve 6-7 is connected through a screw thread with hollow rotating shaft 6-10.
There is the step of protrusion at position among hollow rotating shaft 6-10, convenient for determining the position of positioning sleeve 6-7, positioning sleeve 6-7 is consolidated
It is scheduled on raised position.
Preferably, hollow rotating shaft 6-10 and end baffle 6-4 is connected through a screw thread, and in the outside of end baffle, there is enhancing
Plate 6-9 is connected with it by fixing bolt 6-13.Reinforcing plate 6-9 primarily to effectively by hollow rotating shaft 6-10 rotate when
Power passes on end baffle 6-4.
It is circumferentially evenly distributed on end baffle 6-4, stiffening plate 6-6 and reinforcing plate 6-9 for installing fixing bolt 6-
13 hole.
Embodiment 2
Prepreg is prepared using hot-pressing roller of the present invention, when hot-pressing roller requires heat to certain temperature, is successively beaten
Open the cooling water system of heating power supply and hollow rotating shaft.Heating wire in heating tank 6-3 generates heat, heat transfer to hot pressing
The surface of roller body 1 can effectively guarantee the surface hot pressing roller body 6-1 temperature since heating tank 6-3 is uniformly circumferentially distributed
The homogeneity of degree.After hot-pressing roller 6-1 reaches predetermined temperature, prepreg is prepared, the power for being applied to hot pressing roller surface uniformly transfers
To stiffening 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 very little, prepreg will not be had an impact, and stiffening plate 6-6 and end baffle 6-4 are in whole work process
In the power that is subject to be pressure, it is very small when compression deformation is between 300-400 DEG C, the need of prepreg manufacturing methods can be met
It asks.And hollow rotating shaft 6-10 is connected with always cooling water, will not work at high temperature, therefore will not generate biggish Curved
Become, therefore can guarantee the rigidity of its own at work, big deflection deformation will not occur.The two combines, it is ensured that whole
The surface linear degree of hot pressing roller body 6-1 in a course of work.And then guarantee the dipping effect and width direction of prepreg
Thickness and resin distribution situation.
Due to this hot-pressing roller cavity be vacuum chamber, heat to the thermal loss inside hot-pressing roller only have reinforcing rib and
The heat transfer of end baffle, entire cavity is interior without heat transfer, and thermal loss calculation formula is as follows:
Wherein q is thermal loss amount, and λ is heat transfer coefficient, T1And T2For the temperature for being respectively two faces, referred to herein as hot pressing
The absolute temperature of roller body and hollow rotating shaft, r and a are 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.
It is calculated according to formula (1), same set of equipment, for vacuum and antivacuum system,Wherein q1And λ1For
Thermal loss and thermal conductivity coefficient under vacuum condition, q2And λ2For the thermal loss and the visible heat of thermal conductivity coefficient under condition of normal pressure
Loss it is directly proportional to heat transfer coefficient, with data instance in text, at normal atmospheric pressure, λ2=4.75/w.m-2.k-1, and it is true
Thermal conductivity coefficient λ when reciprocal of duty cycle is 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 portion
Divide energy that can reduce 21.05%, corresponding cooling water amount can reduce by 21.05%.
The above content is merely illustrative of the invention's technical idea, and this does not limit the scope of protection of the present invention, all to press
According to technical idea proposed by the present invention, any changes made on the basis of the technical scheme each falls within claims of the present invention
Protection scope within.
Claims (2)
1. a kind of wide cut thermoplasticity presoaks preparation method for material, which is characterized in that prepare the heat of the wide cut thermoplasticity prepreg
Pressure roller includes hot pressing roller body (6-1) and hollow rotating shaft (6-10), and the hot pressing roller body (6-1) is sleeved on hollow rotating shaft (6-
10) on, hot pressing roller body (6-1) inner surface is provided with hot-pressing roller heating layer (6-2), the hot-pressing roller heating layer (6-2)
Inner surface radial direction uniform welding is provided with the reinforcing rib (6-5) of ring structure, for being fixedly connected with stiffening plate (6-6), the sky
The positioning sleeve (6-7) for the affixed stiffening plate (6-6), positioning sleeve (6-7) setting are provided in heart shaft (6-10)
At the step of the hollow rotating shaft (6-10) middle part protrusion, the stiffening plate (6-6), positioning sleeve (6-7), end baffle (6-
4) it is located along the same line with the center of hollow rotating shaft (6-10)；
The outer surface of the hot-pressing roller heating layer (6-2) is along the circumferential direction evenly arranged with spiral helicine heating tank (6-3), described
Electric heating wire, brush (6- of the electric heating wire by setting at the both ends hollow rotating shaft (6-10) are equipped in heating tank (6-3)
And external electrical connections 12)；
It is provided with cold water pipes (6-11) in the hollow rotating shaft (6-10), hollow rotating shaft (6-10) both ends are additionally provided with increasing
Strong plate (6-9), the reinforcing plate (6-9) are located at the outside of end baffle (6-4), are fastenedly connected with the end baffle (6-4),
The hollow rotating shaft (6-10) is threadedly coupled with end baffle (6-4)；
The hot pressing roller body (6-1) and hot-pressing roller heating layer (6-2) are the hollow columnar structures of both ends open, the heat
Pressure roller ontology (6-1) has smooth outer surface, and step-like groove is respectively arranged at both ends open, passes through the groove and end
Portion's baffle (6-4) is fixedly connected, and is interference fit installation between the hot pressing roller body (6-1) and hot-pressing roller heating layer (6-2)；
Hollow rotating shaft (6-10) both ends are provided with for being fixedly connected with the hot pressing roller body (1) and hot-pressing roller heating layer
The end baffle (6-4) of (6-2) forms internal closed space, the end baffle (6-4) by two end baffles (6-4)
On be provided with vacuum port (6-15), be provided with stiffening plate (6- between the hollow rotating shaft (6-10) and hot-pressing roller heating layer (6-2)
6) multiple round lightening holes (6-14), the hot pressing roller body (6-1) and hot pressing, are evenly arranged on the stiffening plate (6-6)
The axial length of roller heating layer (6-2) is 1~2m；Specific preparation the following steps are included:
S1: pre-installing the fiber cloth of breadth 1-2m on sand frame (1), and the fiber cloth passes sequentially through elution spray head (2) and drier
(3) enter pre-tightening mechanism (4), the fiber cloth is fixed and is pre-tightened, the fiber cloth is glass-fiber-fabric, carbon cloth or aramid fiber
Fiber cloth, including unidirectional, plain weave and twill fabric, the drier (3) is using hot-air, nitrogen or infrared is dried；Institute
State the sprayable water of elution spray head (2), ethyl alcohol, acetone or butanone；
S2: the resin that extrusion die (10) squeezes out prepares progress secondary distribution calendering between roller (5) and hot-pressing roller (6) in glue film,
Obtain the resin film of predetermined thickness and width, the resin that extrusion die (10) squeezes out be polyether-ether-ketone, polyphenylene sulfide, polysulfones or
Thermoplastic polyimide, it is 0.025~0.075mm, the hot-pressing roller (6) that glue film, which prepares gap between roller (5) and hot-pressing roller (6),
Shaft on be provided with pressure sensor device for detecting prepreg dipping effect, the pressure limit of the pressure sensor device
For 0.1~50MPa；
S3: being adhered to the hot-pressing roller (6) surface for the resin film prepared in step S2, into impregnation stage with it is described
Fiber cloth in step S1 pre-tightening mechanism (4) impregnates, and it is cold to pass sequentially through the cooling registration roller (7) equipped with deionized water after dipping
But, edge cutting machine (8) carries out cutting edge, and the prepreg for being made and requiring is wound finally by winder (9), and the glue film prepares roller (5)
The direction of motion and the prepreg direction of motion at nearly prepreg end on the contrary, the direction of motion at the nearly prepreg end of the hot-pressing roller (6) with
The prepreg direction of motion is identical.
2. a kind of wide cut thermoplasticity according to claim 1 presoaks preparation method for material, which is characterized in that the sand frame (1),
It is identical with the rotation linear velocity of wrap-up (9) that pre-tightening mechanism (4), glue film prepare roller (5), hot-pressing roller (6), cooling registration roller (7),
The linear velocity is 0.1-3m/s.
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| 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018181513A1 (en) * | 2017-03-28 | 2018-10-04 | 日立化成株式会社 | Method for manufacturing frp precursor and method for manufacturing frp |
| CN109134900B (en) * | 2017-06-27 | 2022-06-07 | 深圳光启高等理工研究院 | Prepreg and preparation method thereof |
| CN107877867A (en) * | 2017-10-14 | 2018-04-06 | 佛山海格利德机器人智能设备有限公司 | A kind of High-strength environmentally-friefuran fire proofing processing unit (plant) and processing method |
| CN112590057B (en) * | 2021-03-03 | 2021-07-02 | 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 |
| CN115105409B (en) * | 2022-08-26 | 2022-11-08 | 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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