CN115742399A - Continuous infiltration compounding device and process for thermoplastic prepreg fabric - Google Patents
Continuous infiltration compounding device and process for thermoplastic prepreg fabric Download PDFInfo
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- CN115742399A CN115742399A CN202211506835.5A CN202211506835A CN115742399A CN 115742399 A CN115742399 A CN 115742399A CN 202211506835 A CN202211506835 A CN 202211506835A CN 115742399 A CN115742399 A CN 115742399A
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Abstract
The invention discloses a continuous infiltration compounding device and a continuous infiltration compounding process for a thermoplastic prepreg fabric, and relates to the technical field of thermoplastic fiber prepreg processing, wherein a resin film unwinding device is used for winding a thermoplastic resin film; the pre-setting device is used for synchronously pressurizing, laminating and pre-setting the fiber plane fabric and the thermoplastic resin film under the conditions of preset heating temperature and pressure; the reverse composite roller of the continuous infiltration composite device adopts a direction opposite to the traction direction of the fiber plane fabric pre-laminated with the thermoplastic resin film; the preset fiber/resin film laminated structure is pasted on the surface of a reverse composite roller in an S-shaped wrap angle mode; a hot-pressing melting composite area is formed between the contact surfaces of the reverse composite roller and the half-roller hot-pressing assembly; the traction device is used for traction and rolling of the thermoplastic resin prepreg after infiltration compounding. The invention can improve the hot melting effect of the fiber fabric and the film thermoplastic resin, is beneficial to discharging gas in the fiber monofilament and effectively improves the integral compact effect of the pre-impregnated fabric.
Description
Technical Field
The invention relates to the technical field of thermoplastic fiber prepreg processing, in particular to a continuous infiltration compounding device and process for a thermoplastic prepreg fabric.
Background
At present, thermoplastic prepregs are used as key intermediate products of thermoplastic composite materials, the preparation is difficult, the production cost is relatively high, and various fiber and thermoplastic resin impregnation composite preparation technical researches exist at present, such as a powder method, a melt extrusion method, an in-situ polymerization method and a film infiltration composite method.
The film compounding method is to adopt thermoplastic film resin and high-performance fiber to be jointed and laminated, and then melt the resin film jointed on the surface of the fiber by a heating method, so as to effectively compound with a fiber reinforcement to prepare the thermoplastic fiber prepreg cloth. The continuous filament bundle fabric thermoplastic prepreg is prepared by adopting the film resin matrix and the fiber fabric in a heating infiltration mode, the production efficiency is high, but the infiltration pressure of the film resin in the fiber fabric monofilament is insufficient, so that the infiltration efficiency is low, meanwhile, in the melting process of the resin film in the fiber bundle, the gas in the monofilament fiber is not easy to discharge, and the compactness and the interlayer bonding performance of the final prepreg are directly influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a continuous infiltration compounding device and a continuous infiltration compounding process for a thermoplastic prepreg fabric, which can improve the hot melting effect of a fiber fabric and a film thermoplastic resin, are favorable for exhausting gas in fiber monofilaments and effectively improve the integral compact effect of the prepreg fabric.
In order to achieve the purpose, the invention is realized by the following technical scheme:
in a first aspect, embodiments of the present invention provide a thermoplastic prepreg fabric continuous infiltration compounding device, comprising:
the resin film unwinding device is used for winding the thermoplastic resin film;
the pre-setting device comprises a pre-setting roller pair, and is used for synchronously pressurizing, laminating and pre-setting the fiber plane fabric and the thermoplastic resin film under the conditions of set pre-setting heating temperature and pressure;
the continuous infiltration compounding device comprises a reverse compounding roller and a half-roller hot-pressing assembly, wherein the reverse compounding roller adopts a direction opposite to the traction direction of a fiber plane fabric pre-attached with a thermoplastic resin film; the preset fiber/resin film laminated structure is pasted on the surface of a reverse composite roller in an S-shaped wrap angle mode; a hot-pressing fusion compounding area is formed between the contact surfaces of the reverse compounding roller and the half-roller hot-pressing assembly and is used for finishing infiltration compounding of the pre-shaped fiber/resin film laminated material;
the traction device comprises a traction pair roller and is used for traction and rolling of the thermoplastic resin prepreg after infiltration compounding.
In a further implementation mode, the bonding surface of the fiber/resin film laminated structure and the reverse composite roll is not smaller than the semi-cylindrical area of the reverse composite roll.
As a further implementation mode, the rotation directions of the two reverse composite rollers are opposite, and the half roller hot-pressing assemblies corresponding to the two reverse composite rollers are located on different sides.
As a further implementation mode, the half-roller hot-pressing assembly adopts an arc-shaped cylindrical structure and adopts an electric heating or oil heating mode.
As a further implementation mode, a hydraulic driving system is adopted to form a hot-pressing melting compounding area between the arc-shaped cylindrical inner surface of the half-roller hot-pressing assembly and the wrap angle contact surface of the reverse compounding roller.
As a further implementation mode, the presetting temperature is controlled to be within the range of 30-50 ℃ lower than the heat deformation temperature of the resin film, and the presetting line pressure is less than or equal to 500KN/m.
In a second aspect, embodiments of the present invention further provide a continuous infiltration compounding process for a thermoplastic prepreg fabric, including:
winding a thermoplastic resin film with a set width on a resin film unwinding device;
under the conditions of preset heating temperature and preset pressure, synchronously pressing, laminating and presetting the fiber plane fabric and the thermoplastic resin film led out from the resin film unreeling device by virtue of a presetting roller;
the pre-shaped fiber/resin film laminated structure is pasted on the surface of a reverse composite roller in an S-shaped wrap angle mode, then the pressure is applied through a half-roller hot-pressing assembly, and a hot-pressing fusion composite area is formed between the contact surfaces of the reverse composite roller and the half-roller hot-pressing assembly;
and (3) dragging and subsequently rolling the thermoplastic resin prepreg after infiltration compounding by using a dragging device.
As a further implementation, the reverse composite roller adopts a direction opposite to the traction direction of the fiber plane fabric pre-laminated with the thermoplastic resin film; the binding surface of the fiber/resin film laminated structure and the reverse composite roller is not less than the semi-cylinder area of the reverse composite roller.
As a further implementation, the width of the thermoplastic resin film is between 300 and 1600 mm; the fiber plane fabric adopts a unidirectional fiber arrangement or two-dimensional plane weaving mode.
As a further implementation mode, the presetting temperature is controlled to be 30-50 ℃ lower than the thermal deformation temperature of the resin film, and the presetting line pressure is less than or equal to 500KN/m; the maximum working temperature of the pre-setting pair roller is 400 ℃; the maximum working temperature of the reverse composite roller and the half roller hot pressing assembly is 500 ℃.
The invention has the following beneficial effects:
the invention adopts a prepreg preparation mode of fusion infiltration compounding after laminating and attaching a film method resin matrix and a fiber plane fabric, wherein. The planar positioning and attaching of the continuous fiber planar fabric and the film-shaped resin matrix can be realized by adopting a pre-setting device, and the uniform distribution of the resin matrix in a large planar range can be effectively realized; through the design of a two-stage continuous infiltration compounding device, a uniform infiltration compounding area of a laminated structure of a film-shaped resin matrix and a continuous fiber plane fabric is constructed, the temperature uniformity effect and the pressure driving effect of resin melt infiltration are ensured, and the efficient impregnation compounding of resin and fiber is realized; the reverse composite roller of the continuous infiltration compounding device adopts a rotation mode reverse to the traction of the fiber fabric, so that the fiber resin melting and impregnation time is effectively ensured, and the uniform compounding effect of the film-shaped resin is improved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic diagram of an apparatus according to one or more embodiments of the present invention.
The device comprises a resin film unreeling device 1, a resin film pre-setting device 2, a continuous infiltration compounding device 3, a traction device 4, a reverse compounding roller 5 and a half roller hot pressing assembly 6.
Detailed Description
The first embodiment is as follows:
the embodiment provides a continuous infiltration compounding device for thermoplastic prepreg fabrics, which comprises a resin film unreeling device 1, a pre-setting device 2, a continuous infiltration compounding device 3 and a traction device 4 which are sequentially arranged as shown in fig. 1.
Specifically, the resin film unwinding device 1 is used for winding thermoplastic resin films of various widths, and the resin film unwinding device 1 winds the thermoplastic resin films by using rollers. The width of the thermoplastic resin film can be 300-1600mm, and the appropriate film-shaped resin raw material can be matched according to the specification requirement of the final thermoplastic prepreg, wherein the thickness of the film can be flexibly adjusted between 0.01-0.2mm, and the thickness can be selected according to the resin content requirement of the final prepreg.
The thermoplastic resin film can be selected from different types, such as any one of polyethylene, polypropylene, polyether ketone, polyether ether ketone, polyphenylene sulfide, polycarbonate, polyformaldehyde, polyamide, polyurethane and the like, and the gram weight of the resin film can be flexibly adjusted according to the requirements of prepreg products, and is basically 40-120g/m 2 And (4) selecting within the range.
The presetting device 2 of the embodiment adopts a double-roller driving mode, namely comprises two presetting rollers, and the two presetting rollers form a presetting double roller. Under the conditions of certain presetting heating temperature and pressure, the fiber plane fabric and a film-shaped resin matrix led out from a resin film unreeling device are synchronously pressed, attached and preshaped through a presetting pair roller, and the presetting temperature is controlled within the range of 30-50 ℃ lower than the thermal deformation temperature of the resin film, so that resin gumming in the presetting process caused by overlarge fluidity after the resin is melted can be effectively avoided; the preshaping line pressure is less than or equal to 500KN/m.
Furthermore, the pre-shaping roller can be made of forged alloy steel materials such as 38CrMoA l, 40CrMoA l, 42CrMo, 40Cr, 9Cr2Mo and the like, and the intermediate frequency quenching treatment is carried out on the roller surface on the alloy materials in the process, so that the surface hardness of the roller is improved.
The diameter of the pre-setting roller is controlled within the range of 100-500mm, and the length of the roller is controlled within the range of 500-2000 mm. The maximum working temperature of the pre-shaping roller is 400 ℃, the temperature control precision is less than or equal to +/-1 ℃, the mechanical precision of the pre-shaping roller is less than or equal to 0.005mm @ RT, and the rotating speed of the pair roller is controlled to be 5-50 m/min.
The fiber plane fabric introduced by the pre-setting device 2 can adopt a one-way fiber arrangement or two-dimensional plane weaving mode, wherein the fiber type can be any one of glass fiber, carbon fiber, aramid fiber, basalt fiber and the like and is not limited to the above type, and the fiber plane weaving mode can adopt any one of plain weave, twill weave or satin weave two-dimensional weaving structure mode.
The plain weave, twill weave or satin weave fabrics of glass fiber, carbon fiber, aramid fiber and basalt fiber and a film-shaped resin matrix led out from a resin film unreeling device are synchronously pressed, attached and preshaped by a preshaping roller, the preshaping temperature is 220 ℃, and the preshaping linear pressure is less than or equal to 500KN/m.
The continuous infiltration compounding device 3 consists of two parts, namely a reverse compounding roller 5 and a half-roller hot-pressing assembly 6, wherein the two reverse compounding rollers 5 are arranged at intervals, and the rotation directions are opposite; the central connecting line of the two reverse compound rollers 5 is vertical to the drawing direction of the thermoplastic resin film.
In the embodiment, the reverse composite roller 5 adopts a direction opposite to the traction direction of a fiber plane fabric pre-laminated with a thermoplastic resin film, a pre-shaped fiber/resin film laminated structure is adhered to the surface of the reverse composite roller at a large S wrap angle, the adhering surface is not smaller than the semi-cylindrical area of the reverse composite roller (the wrap angle is not less than 180 degrees), then a half-roller hot-pressing assembly 6 is used for pressurizing, a hot-pressing melting composite area is formed between the contact surfaces of the reverse composite roller 5 and the half-roller hot-pressing assembly 6, and the infiltration and the compounding of the pre-shaped fiber/resin film laminated material are completed in the cavity.
The roller of the reverse composite roller 5 can be made of forged alloy steel materials such as 38CrMoA l, 40CrMoA l, 42CrMo, 40Cr, 9Cr2Mo and the like, the intermediate frequency quenching treatment of the roller surface is carried out on the alloy materials in the process, the surface hardness of the roller is improved, and meanwhile, the surface of the roller of the reverse composite roller is plated with hard chromium and sprayed with a Teflon coating to carry out surface anti-sticking treatment.
The diameter of the roller of the reverse composite roller 5 is controlled within the range of 300-500mm, and the length of the roller is controlled within the range of 500-2000 mm. The maximum working temperature of the reverse composite roller is 500 ℃, the temperature control precision is less than or equal to +/-1 ℃, the mechanical precision of the reverse composite roller is less than or equal to 0.002mm @ RT, the rotating speed of the reverse composite roller is controlled at 5-50 m/min, and the rotating direction of the reverse composite roller is opposite to the traction direction of the fiber plane fabric.
Further, the half-roller hot-pressing assembly 6 adopts an arc-shaped cylindrical design, the half-roller hot-pressing assembly 6 can be made of 38CrMoA l, 40CrMoA l, 42CrMo, 40Cr, 9Cr2Mo and other forging alloy steel materials, an electric heating or oil heating mode is adopted, the maximum working temperature is 500 ℃, and the temperature control precision is less than or equal to +/-1 ℃.
A hydraulic driving system is adopted to form a melting impregnation area for heating and pressurizing a preset fiber/resin film laminated structure between the arc-shaped cylindrical inner surface of the half-roller hot-pressing assembly and the wrap angle contact surface of the reverse composite roller, the composite temperature is flexibly designed according to the hot-melt flow temperature characteristic of the thermoplastic resin film, and the composite melting pressure is controlled within the range of 0.5-5MPa and can be flexibly adjusted according to the infiltration requirement.
The continuous infiltration compound device 3 finishes resin and fiber fabric impregnation and infiltration through the cooperation of the reverse compound roller 5 and the half-roller hot-pressing assembly 6, two sets of systems are arranged, different heating and pressurizing temperature ranges can be configured for a single set of system, two-stage temperature and pressure gradients are formed, and multi-level infiltration compound of thermoplastic resin and fiber fabric is effectively finished.
The traction device 4 finishes the traction and subsequent rolling of the thermoplastic resin prepreg after infiltration compounding by adopting a double-roller pressurization mode; that is, the traction device 4 comprises two traction rollers, and the traction rollers are made of metal materials, such as: the traction roller can be made of forged alloy steel materials such as 38CrMoA l, 40CrMoA l, 42CrMo, 40Cr, 9Cr2Mo and the like, the diameter of the roller is controlled within the range of 300-500mm, the length of the roller is controlled within the range of 500-2000mm, and the rotating speed of the roller is controlled within the range of 5-50 m/min.
The presetting device 2 of the embodiment can realize the plane positioning and attaching of the continuous fiber plane fabric and the film-shaped resin matrix, and can effectively realize the uniform distribution of the resin matrix in a large plane range; through the design of a two-stage continuous infiltration compounding device, a uniform infiltration compounding area of a laminated structure of a film-shaped resin matrix and a continuous fiber plane fabric is constructed, the temperature uniformity effect and the pressure driving effect of resin melt infiltration are ensured, and the efficient impregnation compounding of resin and fiber is realized; the reverse composite roller 5 of the continuous infiltration composite device 3 adopts a rotation mode reverse to the traction of the fiber fabric, thereby effectively ensuring the melting and impregnation time of the fiber resin and improving the uniform composite effect of the film resin.
Example two:
the embodiment provides a continuous infiltration composite process of a thermoplastic prepreg fabric, which adopts the device of the first embodiment and comprises the following steps:
winding a thermoplastic resin film with a set width on a resin film unwinding device;
under the conditions of preset heating temperature and preset pressure, synchronously pressing, laminating and presetting the fiber plane fabric and the thermoplastic resin film led out from the resin film unreeling device by virtue of a presetting roller;
the pre-shaped fiber/resin film laminated structure is pasted on the surface of a reverse composite roller in an S-shaped wrap angle mode, then the pressure is applied through a half-roller hot-pressing assembly, and a hot-pressing fusion composite area is formed between the contact surfaces of the reverse composite roller and the half-roller hot-pressing assembly;
and (4) drawing and subsequently rolling the thermoplastic resin prepreg after infiltration compounding through a drawing device.
In the embodiment, the prepreg preparation method of infiltration compounding after lamination and lamination of the film method resin matrix and the fiber plane fabric (unidirectional or two-dimensional weaving) is adopted, so that the uniform distribution of the resin matrix in a large plane range can be effectively realized; the temperature uniformity effect and the pressure driving effect of resin melting and permeation are ensured, and the efficient impregnation compounding of the resin and the fibers is realized; the compounding uniformity effect of the film-shaped resin is improved.
Example three:
the embodiment provides a continuous infiltration compounding process for thermoplastic prepreg fabric, which adopts the device of the first embodiment and a resin unreeling device to assemble 40g/m fabric with the width of 300mm and the thickness of 0.01mm 2 The polyethylene film of (1). After the resin film is placed in a roll, 38CrMoAl forging alloy steel subjected to intermediate frequency quenching is adopted to prepare a roller of a pre-shaping device with the diameter of 100mm and the length of 500mm, the maximum working temperature of the roller is 400 ℃, the temperature control precision is less than or equal to +/-1 ℃, the mechanical precision of the roller is less than or equal to 0.005mm @ RT, and the rotating speed of the roller is controlled at 5m/mi n. After pre-setting, the mixture enters a continuous infiltration compounding device consisting of a reverse compounding roller and a half-roller hot-pressing assembly. The method is characterized in that 40CrMoAl alloy steel subjected to intermediate frequency quenching is selected to prepare a reverse composite roller with the diameter of 500mm and the length of 600mm, the maximum working temperature of the roller is 400 ℃, the temperature control precision is less than or equal to +/-1 ℃, the mechanical precision is less than or equal to 0.002mm @ RT, and the rotating speed of the reverse composite roller is controlled at 10 m/min. A half-roller hot-pressing assembly of an arc-shaped cylindrical design made of 40CrMoAl forging alloy steel is adopted, the half-roller hot-pressing assembly adopts an electric heating mode, the maximum working temperature is 400 ℃, and the temperature control precision is less than or equal to +/-1 ℃.
The reverse composite roller and the fiber plane fabric pre-laminated with the thermoplastic resin film are opposite in traction direction, the fiber/resin film laminated structure subjected to pre-shaping is pasted on the surface of the reverse composite roller at a wrap angle of 200 degrees, then the reverse composite roller is pressurized by a half-roller hot-pressing assembly, a hot-pressing melting composite area is formed between the contact surfaces of the reverse composite roller and the half-roller hot-pressing assembly, and infiltration and lamination of the pre-shaped fiber/resin film laminated material are completed in the cavity. A fusion dipping area is formed between the arc cylindrical inner surface of the half-roller hot-pressing assembly and the wrap angle contact surface of the reverse composite roller by adopting hydraulic drive, the continuous infiltration composite device is arranged into two systems, the composite temperature is controlled in two temperature gradient areas of 130 ℃ and 150 ℃, and the composite fusion pressure is arranged into two pressure gradients of 0.6MPa and 2 MPa. And (3) finishing traction and subsequent rolling of the thermoplastic resin prepreg after infiltration compounding by adopting a metal-to-roller pressurizing mode, wherein 9Cr2Mo forged alloy steel metal double rollers with the diameter of 300mm and the length of 1000mm are adopted for traction, and the rotating speed of a roller is 20m/mi n.
Example four:
the embodiment provides a continuous infiltration compounding process for thermoplastic prepreg fabric, which adopts the device in the first embodiment, and a resin unreeling device is assembled with 110g/m with the breadth of 700mm and the thickness of 0.1mm 2 The polypropylene film of (1). After the resin film is placed in a roll, 42CrMo forging alloy steel subjected to intermediate frequency quenching is adopted to prepare a roller of a pre-shaping device with the diameter of 300mm and the length of 1000mm, the maximum working temperature of the roller is 500 ℃, the temperature control precision is less than or equal to +/-1 ℃, the mechanical precision of the roller is less than or equal to 0.005mm @ RT, and the rotating speed of the roller is controlled at 30m/mi n. After pre-setting, the mixture enters a continuous infiltration compounding device consisting of a reverse compounding roller and a half-roller hot-pressing assembly. The method is characterized in that 40Cr alloy steel subjected to intermediate frequency quenching treatment is selected to prepare a reverse composite roller with the diameter of 400mm and the length of 1000mm, the maximum working temperature of the roller is 400 ℃, the temperature control precision is less than or equal to +/-1 ℃, the mechanical precision is less than or equal to 0.002mm @ RT, and the rotating speed of the reverse composite roller is controlled at 20 m/min. The semi-roller hot-pressing component is designed in an arc-shaped cylindrical mode and made of 9Cr2Mo forging alloy steel, the semi-roller hot-pressing component adopts an oil heating mode, the maximum working temperature is 400 ℃, and the temperature control precision is less than or equal to +/-1 ℃.
The reverse composite roller and the fiber plane fabric pre-laminated with the thermoplastic resin film are opposite in traction direction, the fiber/resin film laminated structure subjected to pre-shaping is pasted on the surface of the reverse composite roller at a wrap angle of 180 degrees, then the reverse composite roller is pressurized by a half-roller hot-pressing assembly, a hot-pressing melting composite area is formed between the contact surfaces of the reverse composite roller and the half-roller hot-pressing assembly, and infiltration and lamination of the pre-shaped fiber/resin film laminated material are completed in the cavity. A fusion dipping area is formed between the arc cylindrical inner surface of the half-roller hot-pressing assembly and the wrap angle contact surface of the reverse composite roller by adopting hydraulic drive, the continuous infiltration composite device is arranged into two systems, the composite temperature is controlled in two temperature gradient areas of 180 ℃ and 220 ℃, and the composite fusion pressure is arranged into two pressure gradients of 1MPa and 2 MPa. And (3) finishing traction and subsequent rolling of the thermoplastic resin prepreg after infiltration compounding by adopting a metal-to-roller pressurizing mode, wherein 38CrMoAl forged alloy steel metal roller pairs with the diameter of 4500mm and the length of 1000mm are adopted for traction, and the rotating speed of a roller is 45m/mi n.
Example five:
the embodiment provides a continuous infiltration compounding process for thermoplastic prepreg fabric, which is implemented by adopting the device in the embodiment I and a resin unreeling device which is assembled with 80g/m fabric with the width of 1200mm and the thickness of 0.09mm 2 The polycarbonate film of (1). After the resin film is placed in a roll, preparing a roller of a pre-shaping device with the diameter of 300mm and the length of 500-2000mm by adopting 40CrMoAl forging alloy steel subjected to intermediate frequency quenching treatment, wherein the maximum working temperature of the roller is 400 ℃, the temperature control precision is less than or equal to +/-1 ℃, the mechanical precision of the roller is less than or equal to 0.005mm @ RT, and the rotating speed of the roller is controlled to be 5-50 m/min. After pre-setting, the mixture enters a continuous infiltration compounding device consisting of a reverse compounding roller and a half-roller hot-pressing assembly. The roller of the reverse composite roller with the diameter of 500mm and the length of 1100mm is prepared from 40CrMoAl alloy steel subjected to medium-frequency quenching treatment, the maximum working temperature of the roller is 400 ℃, the temperature control precision is less than or equal to +/-1 ℃, the mechanical precision is less than or equal to 0.002mm @ RT, and the rotating speed of the reverse composite roller is controlled at 45 m/min. A half-roller hot-pressing assembly which is made of 9Cr2Mo forged alloy steel and is designed in an arc-shaped barrel shape is adopted, an electric heating mode is adopted for the half-roller hot-pressing assembly, the maximum working temperature is 500 ℃, and the temperature control precision is less than or equal to +/-1 ℃.
The reverse composite roller and the fiber plane fabric pre-laminated with the thermoplastic resin film are opposite in traction direction, the fiber/resin film laminated structure subjected to pre-shaping is pasted on the surface of the reverse composite roller at a wrap angle of 190 degrees, then the reverse composite roller is pressurized by a half-roller hot-pressing assembly, a hot-pressing melting composite area is formed between the contact surfaces of the reverse composite roller and the half-roller hot-pressing assembly, and infiltration and lamination of the pre-shaped fiber/resin film laminated material are completed in the cavity. A melting and dipping area is formed between the arc cylindrical inner surface of the half-roller hot-pressing assembly and the wrap angle contact surface of the reverse composite roller by adopting hydraulic drive, the continuous infiltration composite device is arranged into two systems, the composite temperature is controlled in two temperature gradient areas of 210 ℃ and 230 ℃, and the composite melting pressure is arranged into two pressure gradients of 0.8MPa and 2 MPa. And (3) finishing traction and subsequent rolling of the thermoplastic resin prepreg after infiltration compounding by adopting a metal-to-roller pressurizing mode, wherein 38CrMoAl forged alloy steel metal roller pairs with the diameter of 4500mm and the length of 1000mm are adopted for traction, and the roller rotating speed is 40m/mi n.
Example six:
the embodiment provides a continuous infiltration compounding process for thermoplastic prepreg fabric, which adopts the device of the embodiment I, and a resin unreeling device is provided with 70g/m with the width of 1000mm and the thickness of 0.08mm 2 The polyurethane film of (1). After the resin film is placed in a roll, 42CrMo forging alloy steel subjected to intermediate frequency quenching is adopted to prepare a roller of a pre-shaping device with the diameter of 400mm and the length of 1000mm, the maximum working temperature of the roller is 400 ℃, the temperature control precision is less than or equal to +/-1 ℃, the mechanical precision of the roller is less than or equal to 0.005mm @ RT, and the rotating speed of the roller is controlled at 30m/mi n. After pre-setting, the mixture enters a continuous infiltration compounding device consisting of a reverse compounding roller and a half-roller hot-pressing assembly. A reverse composite roller with the diameter of 400mm and the length of 1000mm is prepared from 38CrMoA l alloy steel subjected to medium-frequency quenching treatment, the maximum working temperature of the roller is 500 ℃, the temperature control precision is less than or equal to +/-1 ℃, the mechanical precision is less than or equal to 0.002mm @ RT, and the rotating speed of the reverse composite roller is controlled at 20 m/min. A half-roller hot-pressing assembly of an arc-shaped cylindrical design made of 40CrMoA l forging alloy steel is adopted, the half-roller hot-pressing assembly adopts an electric heating mode, the maximum working temperature is 300 ℃, and the temperature control precision is less than or equal to +/-1 ℃.
The reverse composite roller and the fiber plane fabric pre-laminated with the thermoplastic resin film are opposite in traction direction, the fiber/resin film laminated structure subjected to pre-shaping is pasted on the surface of the reverse composite roller at a wrap angle of 180 degrees, then the reverse composite roller is pressurized by a half-roller hot-pressing assembly, a hot-pressing melting composite area is formed between the contact surfaces of the reverse composite roller and the half-roller hot-pressing assembly, and infiltration and lamination of the pre-shaped fiber/resin film laminated material are completed in the cavity. A fusion dipping area is formed between the arc cylindrical inner surface of the half-roller hot-pressing assembly and the wrap angle contact surface of the reverse composite roller by adopting hydraulic drive, the continuous infiltration composite device is arranged into two systems, the composite temperature is controlled in two temperature gradient areas of 150 ℃ and 230 ℃, and the composite fusion pressure is arranged into two pressure gradients of 1.5MPa and 1 MPa. And (3) finishing traction and subsequent rolling of the thermoplastic resin prepreg after infiltration compounding by adopting a metal-to-roller pressurizing mode, wherein 9Cr2Mo forged alloy steel metal double rollers with the diameter of 500mm and the length of 1000mm are adopted for traction, and the rotating speed of a roller is 40m/mi n.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A thermoplastic prepreg fabric continuous infiltration compounding device, comprising:
the resin film unwinding device is used for winding the thermoplastic resin film;
the pre-setting device comprises a pre-setting roller pair, and is used for synchronously pressurizing, laminating and pre-setting the fiber plane fabric and the thermoplastic resin film under the conditions of set pre-setting heating temperature and pressure;
the continuous infiltration compounding device comprises a reverse compounding roller and a half-roller hot-pressing assembly, wherein the reverse compounding roller adopts a direction opposite to the traction direction of a fiber plane fabric pre-laminated with a thermoplastic resin film; the preset fiber/resin film laminated structure is pasted on the surface of a reverse composite roller in an S-shaped wrap angle mode; a hot-pressing fusion compounding area is formed between the contact surfaces of the reverse compounding roller and the half-roller hot-pressing assembly and is used for finishing infiltration compounding of the pre-shaped fiber/resin film laminated material;
the traction device comprises a traction pair roller and is used for traction and rolling of the thermoplastic resin prepreg after infiltration compounding.
2. The continuous infiltration compounding device of claim 1, wherein the surface of the fiber/resin film laminate that is engaged by the counter compounding roll is not less than the half-cylindrical area of the counter compounding roll.
3. The continuous infiltration compounding device of the thermoplastic prepreg fabric, according to claim 1, wherein the two reverse compounding rollers rotate in opposite directions, and the half-roller hot-pressing assemblies of the two reverse compounding rollers are located on different sides.
4. The continuous infiltration compounding device of the thermoplastic prepreg fabric, according to claim 1 or 3, characterized in that the half-roll hot-press assembly adopts a circular arc-shaped cylindrical structure and adopts an electric heating or oil heating mode.
5. The continuous infiltration compounding device of the thermoplastic prepreg fabric as claimed in claim 4, wherein a hydraulic driving system is adopted to form a hot-pressing fusion compounding area between the arc-shaped cylindrical inner surface of the half-roller hot-pressing assembly and the wrap angle contact surface of the reverse compounding roller.
6. The continuous infiltration compounding device of the thermoplastic prepreg fabric, according to claim 1, wherein the presetting temperature is controlled within a range of 30-50 ℃ lower than the heat distortion temperature of the resin film, and the presetting line pressure is less than or equal to 500KN/m.
7. A continuous infiltration compounding process for a thermoplastic prepreg fabric is characterized by comprising the following steps of:
winding a thermoplastic resin film with a set width on a resin film unwinding device;
under the conditions of preset heating temperature and preset pressure, synchronously pressing, laminating and presetting the fiber plane fabric and the thermoplastic resin film led out from the resin film unreeling device by virtue of a presetting roller;
the pre-shaped fiber/resin film laminated structure is pasted on the surface of a reverse composite roller in an S-shaped wrap angle mode, then the pressure is applied through a half-roller hot-pressing assembly, and a hot-pressing fusion composite area is formed between the contact surfaces of the reverse composite roller and the half-roller hot-pressing assembly;
and (4) drawing and subsequently rolling the thermoplastic resin prepreg after infiltration compounding through a drawing device.
8. The continuous infiltration compounding process of thermoplastic pre-preg fabric according to claim 7, wherein the reverse compounding roller is turned in a direction opposite to the pulling direction of the fiber plane fabric pre-laminated with the thermoplastic resin film; the binding surface of the fiber/resin film laminated structure and the reverse composite roller is not less than the semi-cylinder area of the reverse composite roller.
9. The continuous infiltration compounding process of thermoplastic pre-impregnated fabric according to claim 7 or 8, wherein the width of the thermoplastic resin film is 300-1600 mm; the fiber plane fabric adopts a unidirectional fiber arrangement or two-dimensional plane weaving mode.
10. The continuous infiltration compounding process of the thermoplastic prepreg fabric according to claim 7, wherein the presetting temperature is controlled within a range of 30-50 ℃ lower than the thermal deformation temperature of the resin film, and the presetting line pressure is less than or equal to 500KN/m; the maximum working temperature of the pre-setting pair roller is 400 ℃; the maximum working temperature of the reverse composite roller and the half roller hot pressing assembly is 500 ℃.
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| CN202211506835.5A CN115742399A (en) | 2022-11-29 | 2022-11-29 | Continuous infiltration compounding device and process for thermoplastic prepreg fabric |
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| CN202211506835.5A CN115742399A (en) | 2022-11-29 | 2022-11-29 | Continuous infiltration compounding device and process for thermoplastic prepreg fabric |
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