CN112454949B - Preparation process of carbon fiber part with built-in foaming mold - Google Patents

Preparation process of carbon fiber part with built-in foaming mold Download PDF

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CN112454949B
CN112454949B CN202011259797.9A CN202011259797A CN112454949B CN 112454949 B CN112454949 B CN 112454949B CN 202011259797 A CN202011259797 A CN 202011259797A CN 112454949 B CN112454949 B CN 112454949B
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mold
foaming
kettle
carbon fiber
built
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CN112454949A (en
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杨虎平
汪烨
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Oya Carbon Co ltd
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Oya Carbon Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/70—Completely encapsulating inserts
    • 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
    • B29B11/00—Making preforms
    • B29B11/06—Making preforms by moulding the material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/0407—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by regulating the temperature of the mould or parts thereof, e.g. cold mould walls inhibiting foaming of an outer layer
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
    • B29C44/04—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities
    • B29C44/0415—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles consisting of at least two parts of chemically or physically different materials, e.g. having different densities by regulating the pressure of the material during or after filling of the mould, e.g. by local venting
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
    • B29C44/34—Auxiliary operations
    • B29C44/60—Measuring, controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/681—Component parts, details or accessories; Auxiliary operations
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/88—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced
    • B29C70/887—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts characterised primarily by possessing specific properties, e.g. electrically conductive or locally reinforced locally reinforced, e.g. by fillers
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/0085—Use of fibrous compounding ingredients
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J9/00—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
    • C08J9/04—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent
    • C08J9/12—Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof using blowing gases generated by a previously added blowing agent by a physical blowing agent
    • C08J9/122—Hydrogen, oxygen, CO2, nitrogen or noble gases
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2203/00—Foams characterized by the expanding agent
    • C08J2203/06—CO2, N2 or noble gases
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2361/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
    • C08J2361/04—Condensation polymers of aldehydes or ketones with phenols only
    • C08J2361/16—Condensation polymers of aldehydes or ketones with phenols only of ketones with phenols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2363/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2461/00—Characterised by the use of condensation polymers of aldehydes or ketones; Derivatives of such polymers
    • C08J2461/04—Condensation polymers of aldehydes or ketones with phenols only
    • C08J2461/16—Condensation polymers of aldehydes or ketones with phenols only of ketones with phenols
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08J—WORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H
    • C08J2463/00—Characterised by the use of epoxy resins; Derivatives of epoxy resins

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Composite Materials (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)

Abstract

The invention relates to the field of composite materials, in particular to a preparation process of a carbon fiber part with a built-in foaming mold. Firstly, preparing a glass fiber/polyether-ether-ketone composite material, and then preparing a foaming module; cutting the prepreg into a specified size; wrapping the foam mold with a film; placing the prepreg in a mold, attaching the prepreg to the mold, placing a foaming module in the prepreg, closing and fastening the mold, moving the mold into a heating device to heat for a period of time, and curing and molding the foaming module in the heating process to obtain a carbon fiber part with a built-in foaming mold; and when the curing and forming end time is reached, removing the carbon fiber part with the built-in foaming mold from the heating device, placing the carbon fiber part on a cooling table, cooling the mold to 50 +/-5 ℃, moving the mold to a working platform, and opening the mold to take out the carbon fiber part. The invention adopts the prepreg prepared by the carbon fiber to wrap the foaming module, thereby increasing the strength and rigidity of the foaming module and effectively improving the stability of the foaming module.

Description

Preparation process of carbon fiber part with built-in foaming mold
Technical Field
The invention relates to the field of composite materials, in particular to a preparation process of a carbon fiber part with a built-in foaming mold.
Background
Foam is a plastic fabricated article consisting of gas voids surrounded by a dense continuous phase. The performance of the polymer is closely related to the properties of the polymer and the structural distribution of gas voids. Due to the existence of the foam structure, compared with solid plastics, the foam plastic has the excellent performances of light weight, high specific strength, impact resistance, heat preservation, sound insulation and the like, and is widely applied to the industries of buildings, packaging, automobiles, furniture, refrigeration and the like.
Polyetheretherketone is a foamed material, and its main chain is composed of a large number of benzene rings, ether bonds and carbonyl groups which are repeatedly connected. Due to the special molecular structure, the polyetheretherketone has a plurality of excellent properties such as high mechanical strength, high temperature resistance, corrosion resistance, high flame retardance and the like.
As the special engineering plastic polyetheretherketone has excellent performance, the polyetheretherketone becomes a preferable material in the high-precision field, so the polyetheretherketone-based composite material which introduces a reinforcing material on the basis of the polyetheretherketone resin and has high strength has important significance.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a preparation process of a carbon fiber part with a built-in foaming mold.
In order to achieve the purpose, the invention adopts the following technical scheme:
a preparation process of a carbon fiber part with a built-in foaming mold comprises the following steps:
step one, preparing a glass fiber/polyether-ether-ketone composite material: melting and blending the glass fiber and the polyether-ether-ketone in a double-screw extruder according to a certain proportion, and extruding and granulating to obtain glass fiber/polyether-ether-ketone composite material granules;
step two, preparing a foaming module: filling glass fiber/polyether-ether-ketone composite material granules in a mould, then placing the mould in a high-pressure kettle keeping dry, fixing the mould in the middle of the kettle, and then sealing the kettle; injecting carbon dioxide gas into the kettle for multiple times by using a high-pressure metering pulse pump and discharging the carbon dioxide gas, thereby removing residual air in the kettle; continuously injecting carbon dioxide gas into the kettle by using a high-pressure pump for pressurization until the pressure in the kettle reaches a set saturation pressure value; putting the autoclave into a heating device, and starting a temperature regulator to enable a temperature stable value in the autoclave to reach a saturated temperature value; after the glass fiber/polyether-ether-ketone composite material granules in the kettle are in a saturated condition for a certain time, regulating and controlling the pressure relief rate through a pressure relief valve to discharge carbon dioxide gas in the kettle; after pressure relief is finished, the kettle is quickly placed in a cooling medium for cooling, and a foaming module is prepared;
step three, preparing the carbon fiber part with the built-in foaming mold: cutting the prepreg into a specified size; wrapping the foam mold with a film; placing the prepreg in a mold, attaching the prepreg to the mold, placing a foaming module in the prepreg, closing and fastening the mold, moving the mold into a heating device to heat for a period of time, and curing and molding the foaming module in the heating process to obtain a carbon fiber part with a built-in foaming mold; and when the curing molding finishing time is reached, removing the carbon fiber part with the built-in foaming mold from the heating device, placing the carbon fiber part on a cooling table, cooling the mold to 50 +/-5 ℃, moving the mold to a working platform, opening the mold, and taking out the molded carbon fiber part with the built-in foaming mold.
Further, the mass ratio of the glass fiber to the polyether-ether-ketone in the glass fiber/polyether-ether-ketone composite material pellet is 1:5.
Further, the processing temperature of the double-screw extruder is 370 to 380 ℃, and the screw rotating speed is 350 to 550r/min.
Further, the cooling temperature of the cooling table is 10 +/-5 ℃, and the cooling time is 6 to 8min.
Further, the heating temperature in the heating device is 150 +/-5 ℃, and the heating time is 20 to 60min.
Furthermore, the size of the foaming mould is smaller than that of the carbon fiber piece with the built-in foaming mould by 0.8-1.0 mm.
Further, the prepreg is prepared from an epoxy resin rubber mold and carbon fibers.
Further, the mass percentage of the epoxy resin rubber mold in the prepreg is 30 to 50 percent.
Further, the saturation pressure is 20MPa, and the saturation temperature is 325-340 ℃.
Compared with the prior art, the invention adopts the glass fiber and the carbon fiber as the reinforcing materials, most of the glass fiber is distributed in the hole wall in an oriented way to support the bubble, the stability of the bubble material is enhanced, and the compressive strength is also improved; the prepreg prepared from the carbon fibers is wrapped outside the foaming module, so that the strength and rigidity of the foaming module are improved, the stability of the foaming module is effectively improved, and the damage in use is reduced.
Drawings
FIG. 1 is a graph showing the volume expansion of foam modules at different foam saturation temperatures according to the present invention.
Detailed Description
The invention provides a preparation process of a carbon fiber part with a built-in foaming mold, aiming at realizing a high-strength polyether-ether-ketone-based composite material.
The present invention will be further described with reference to the following examples, which are preferred embodiments of the present invention.
Example 1
The embodiment is a preparation process of a carbon fiber part with a built-in foaming mold, which comprises the following steps:
a preparation process of a carbon fiber part with a built-in foaming mold comprises the following steps:
step one, preparing a glass fiber/polyether-ether-ketone composite material: melting and blending the glass fiber and the polyether-ether-ketone in a double-screw extruder according to a certain proportion, and extruding and granulating to obtain glass fiber/polyether-ether-ketone composite material granules;
step two, preparing a foaming module: filling glass fiber/polyether-ether-ketone composite material granules in a mould, then placing the mould in a high-pressure kettle keeping dry, fixing the mould in the middle of the kettle, and then sealing the kettle; injecting carbon dioxide gas into the kettle for multiple times by using a high-pressure metering pulse pump and discharging the carbon dioxide gas, thereby removing residual air in the kettle; continuously injecting carbon dioxide gas into the kettle by using a high-pressure pump for pressurization until the pressure in the kettle reaches a set saturated pressure value; putting the autoclave into a heating device, and starting a temperature regulator to enable a temperature stable value in the autoclave to reach a saturated temperature value; after the glass fiber/polyether-ether-ketone composite material granules in the kettle are in a saturated condition for a certain time, regulating and controlling the pressure relief rate through a pressure relief valve to discharge carbon dioxide gas in the kettle; after pressure relief is finished, the kettle is quickly placed in a cooling medium for cooling, and a foaming module is prepared;
step three, preparing the carbon fiber part with the built-in foaming mold: cutting the prepreg into a specified size; wrapping the foam mold with a film; placing the prepreg in a mould, attaching the prepreg to the mould, placing the foaming module in the prepreg, closing and buckling the mould, moving the mould into a heating device for heating for a period of time, and curing and molding the foaming module in the heating process to obtain the carbon fiber part with the built-in foaming mould; and when the curing molding finishing time is reached, removing the carbon fiber part with the built-in foaming mold from the heating device, placing the carbon fiber part on a cooling table, cooling the mold to 50 +/-5 ℃, moving the mold to a working platform, opening the mold, and taking out the molded carbon fiber part with the built-in foaming mold.
Preferably, the mass ratio of the glass fiber to the polyetheretherketone in the glass fiber/polyetheretherketone composite pellets is 1:5.
Preferably, the processing temperature of the double-screw extruder is 370 to 380 ℃, and the screw rotating speed is 350 to 550r/min.
Preferably, the cooling temperature of the cooling table is 10 +/-5 ℃, and the cooling time is 6 to 8min.
Preferably, the heating temperature in the heating device is 150 +/-5 ℃, and the heating time is 20 to 60min.
Preferably, the foaming mold part is smaller than the carbon fiber part with the built-in foaming mold by 0.8 to 1.0mm.
Preferably, the prepreg is prepared from an epoxy resin gel mold and carbon fibers.
Preferably, the mass percentage of the epoxy resin rubber mold in the prepreg is 30 to 50 percent.
Preferably, the saturation pressure is 20MPa and the saturation temperature is 325 ℃.
Example 2
A preparation process of a carbon fiber part with a built-in foaming mold comprises the following steps:
step one, preparing a glass fiber/polyether-ether-ketone composite material: melting and blending the glass fiber and the polyether-ether-ketone in a double-screw extruder according to a certain proportion, and extruding and granulating to obtain glass fiber/polyether-ether-ketone composite material granules;
step two, preparing a foaming module: filling glass fiber/polyether-ether-ketone composite material granules in a mould, then placing the mould in a high-pressure kettle keeping dry, fixing the mould in the middle of the kettle, and then sealing the kettle; injecting carbon dioxide gas into the kettle for multiple times by using a high-pressure metering pulse pump and discharging the carbon dioxide gas, thereby removing residual air in the kettle; continuously injecting carbon dioxide gas into the kettle by using a high-pressure pump for pressurization until the pressure in the kettle reaches a set saturated pressure value; putting the autoclave into a heating device, and starting a temperature regulator to enable a temperature stable value in the autoclave to reach a saturated temperature value; after the glass fiber/polyether-ether-ketone composite material granules in the kettle are in a saturated condition for a certain time, regulating and controlling the pressure relief rate through a pressure relief valve to discharge carbon dioxide gas in the kettle; after pressure relief is finished, the kettle is quickly placed in a cooling medium for cooling, and a foaming module is prepared;
step three, preparing the carbon fiber part with the built-in foaming mold: cutting the prepreg into a specified size; wrapping the foam mold with a film; placing the prepreg in a mold, attaching the prepreg to the mold, placing a foaming module in the prepreg, closing and fastening the mold, moving the mold into a heating device to heat for a period of time, and curing and molding the foaming module in the heating process to obtain a carbon fiber part with a built-in foaming mold; and when the curing molding finishing time is reached, removing the carbon fiber part with the built-in foaming mold from the heating device, placing the carbon fiber part on a cooling table, cooling the mold to 50 +/-5 ℃, moving the mold to a working platform, opening the mold, and taking out the molded carbon fiber part with the built-in foaming mold.
Preferably, the mass ratio of the glass fiber to the polyetheretherketone in the glass fiber/polyetheretherketone composite pellets is 1:5.
Preferably, the processing temperature of the double-screw extruder is 370 to 380 ℃, and the screw rotating speed is 350 to 550r/min.
Preferably, the cooling temperature of the cooling table is 10 +/-5 ℃, and the cooling time is 6 to 8min.
Preferably, the heating temperature in the heating device is 150 +/-5 ℃, and the heating time is 20 to 60min.
Preferably, the foaming mold part is smaller than the carbon fiber part with the built-in foaming mold by 0.8 to 1.0mm.
Preferably, the prepreg is prepared by epoxy resin glue mold and carbon fiber.
Preferably, the mass percentage of the epoxy resin rubber mold in the prepreg is 30 to 50 percent.
Preferably, the saturation pressure is 20MPa and the saturation temperature is 327.5 ℃.
Example 3
A preparation process of a carbon fiber part with a built-in foaming mold comprises the following steps:
step one, preparing a glass fiber/polyether-ether-ketone composite material: melting and blending the glass fiber and the polyether-ether-ketone in a double-screw extruder according to a certain proportion, and extruding and granulating to obtain glass fiber/polyether-ether-ketone composite material granules;
step two, preparing a foaming module: filling glass fiber/polyether-ether-ketone composite material granules in a mould, then placing the mould in a high-pressure kettle keeping dry, fixing the mould in the middle of the kettle, and then sealing the kettle; injecting carbon dioxide gas into the kettle for multiple times by using a high-pressure metering pulse pump and discharging the carbon dioxide gas, thereby removing residual air in the kettle; continuously injecting carbon dioxide gas into the kettle by using a high-pressure pump for pressurization until the pressure in the kettle reaches a set saturation pressure value; putting the autoclave into a heating device, and starting a temperature regulator to enable a temperature stable value in the autoclave to reach a saturated temperature value; after the glass fiber/polyether-ether-ketone composite material granules in the kettle are in a saturated condition for a certain time, regulating and controlling the pressure relief rate through a pressure relief valve and discharging carbon dioxide gas in the kettle; after pressure relief is finished, the kettle is quickly placed in a cooling medium for cooling, and a foaming module is prepared;
step three, preparing the carbon fiber part with the built-in foaming mold: cutting the prepreg into a specified size; wrapping the foam mold with a film; placing the prepreg in a mold, attaching the prepreg to the mold, placing a foaming module in the prepreg, closing and fastening the mold, moving the mold into a heating device to heat for a period of time, and curing and molding the foaming module in the heating process to obtain a carbon fiber part with a built-in foaming mold; and when the curing molding finishing time is reached, removing the carbon fiber part with the built-in foaming mold from the heating device, placing the carbon fiber part on a cooling table, cooling the mold to 50 +/-5 ℃, moving the mold to a working platform, opening the mold, and taking out the molded carbon fiber part with the built-in foaming mold.
Preferably, the mass ratio of the glass fiber to the polyetheretherketone in the glass fiber/polyetheretherketone composite pellets is 1:5.
Preferably, the processing temperature of the double-screw extruder is 370 to 380 ℃, and the screw rotating speed is 350 to 550r/min.
Preferably, the cooling temperature of the cooling table is 10 +/-5 ℃, and the cooling time is 6 to 8min.
Preferably, the heating temperature in the heating device is 150 +/-5 ℃, and the heating time is 20 to 60min.
Preferably, the foaming mold component is smaller than the carbon fiber component with the built-in foaming mold by 0.8 to 1.0mm.
Preferably, the prepreg is prepared from an epoxy resin gel mold and carbon fibers.
Preferably, the mass percentage of the epoxy resin rubber mold in the prepreg is 30 to 50 percent.
Preferably, the saturation pressure is 20MPa and the saturation temperature is 330 ℃.
Example 4
A preparation process of a carbon fiber part with a built-in foaming mold comprises the following steps:
step one, preparing a glass fiber/polyether-ether-ketone composite material: melting and blending the glass fiber and the polyether-ether-ketone in a double-screw extruder according to a certain proportion, and extruding and granulating to obtain glass fiber/polyether-ether-ketone composite material granules;
step two, preparing a foaming module: filling glass fiber/polyether-ether-ketone composite material granules in a mould, then placing the mould in a high-pressure kettle keeping dry, fixing the mould in the middle of the kettle, and then sealing the kettle; injecting carbon dioxide gas into the kettle for multiple times by using a high-pressure metering pulse pump and discharging the carbon dioxide gas, thereby removing residual air in the kettle; continuously injecting carbon dioxide gas into the kettle by using a high-pressure pump for pressurization until the pressure in the kettle reaches a set saturation pressure value; putting the autoclave into a heating device, and starting a temperature regulator to enable a temperature stable value in the autoclave to reach a saturated temperature value; after the glass fiber/polyether-ether-ketone composite material granules in the kettle are in a saturated condition for a certain time, regulating and controlling the pressure relief rate through a pressure relief valve to discharge carbon dioxide gas in the kettle; after pressure relief is finished, the kettle is quickly placed in a cooling medium for cooling, and a foaming module is prepared;
step three, preparing the carbon fiber part with the built-in foaming mold: cutting the prepreg into a specified size; wrapping the foam mold with a film; placing the prepreg in a mold, attaching the prepreg to the mold, placing a foaming module in the prepreg, closing and fastening the mold, moving the mold into a heating device to heat for a period of time, and curing and molding the foaming module in the heating process to obtain a carbon fiber part with a built-in foaming mold; and when the curing molding finishing time is reached, removing the carbon fiber part with the built-in foaming mold from the heating device, placing the carbon fiber part on a cooling table, cooling the mold to 50 +/-5 ℃, moving the mold to a working platform, opening the mold, and taking out the molded carbon fiber part with the built-in foaming mold.
Preferably, the mass ratio of the glass fiber to the polyetheretherketone in the glass fiber/polyetheretherketone composite pellets is 1:5.
Preferably, the processing temperature of the double-screw extruder is 370 to 380 ℃, and the screw rotating speed is 350 to 550r/min.
Preferably, the cooling temperature of the cooling table is 10 +/-5 ℃, and the cooling time is 6 to 8min.
Preferably, the heating temperature in the heating device is 150 +/-5 ℃, and the heating time is 20 to 60min.
Preferably, the foaming mold part is smaller than the carbon fiber part with the built-in foaming mold by 0.8 to 1.0mm.
Preferably, the prepreg is prepared by epoxy resin glue mold and carbon fiber.
Preferably, the mass percentage of the epoxy resin rubber mold in the prepreg is 30 to 50 percent.
Preferably, the saturation pressure is 20MPa and the saturation temperature is 332.5 ℃.
Example 5
A preparation process of a carbon fiber part with a built-in foaming mold comprises the following steps:
step one, preparing a glass fiber/polyether-ether-ketone composite material: melting and blending the glass fiber and the polyether-ether-ketone in a double-screw extruder according to a certain proportion, and extruding and granulating to obtain glass fiber/polyether-ether-ketone composite material granules;
step two, preparing a foaming module: filling glass fiber/polyether-ether-ketone composite material granules in a mould, then placing the mould in a high-pressure kettle keeping dry, fixing the mould in the middle of the kettle, and then sealing the kettle; injecting carbon dioxide gas into the kettle for multiple times by using a high-pressure metering pulse pump and discharging the carbon dioxide gas, thereby removing residual air in the kettle; continuously injecting carbon dioxide gas into the kettle by using a high-pressure pump for pressurization until the pressure in the kettle reaches a set saturation pressure value; putting the autoclave into a heating device, and starting a temperature regulator to enable a temperature stable value in the autoclave to reach a saturated temperature value; after the glass fiber/polyether-ether-ketone composite material granules in the kettle are in a saturated condition for a certain time, regulating and controlling the pressure relief rate through a pressure relief valve to discharge carbon dioxide gas in the kettle; after pressure relief is finished, the kettle is quickly placed in a cooling medium for cooling, and a foaming module is prepared;
step three, preparing the carbon fiber part with the built-in foaming mold: cutting the prepreg into a specified size; wrapping the foam mold with a film; placing the prepreg in a mold, attaching the prepreg to the mold, placing a foaming module in the prepreg, closing and fastening the mold, moving the mold into a heating device to heat for a period of time, and curing and molding the foaming module in the heating process to obtain a carbon fiber part with a built-in foaming mold; and when the curing molding finishing time is reached, removing the carbon fiber part with the built-in foaming mold from the heating device, placing the carbon fiber part on a cooling table, cooling the mold to 50 +/-5 ℃, moving the mold to a working platform, opening the mold, and taking out the molded carbon fiber part with the built-in foaming mold.
Preferably, the mass ratio of the glass fiber to the polyetheretherketone in the glass fiber/polyetheretherketone composite pellets is 1:5.
Preferably, the processing temperature of the double-screw extruder is 370 to 380 ℃, and the screw rotating speed is 350 to 550r/min.
Preferably, the cooling temperature of the cooling table is 10 +/-5 ℃, and the cooling time is 6 to 8min.
Preferably, the heating temperature in the heating device is 150 +/-5 ℃, and the heating time is 20 to 60min.
Preferably, the foaming mold part is smaller than the carbon fiber part with the built-in foaming mold by 0.8 to 1.0mm.
Preferably, the prepreg is prepared by epoxy resin glue mold and carbon fiber.
Preferably, the mass percentage of the epoxy resin rubber mold in the prepreg is 30 to 50 percent.
Preferably, the saturation pressure is 20MPa and the saturation temperature is 335 ℃.
Example 6
A preparation process of a carbon fiber part with a built-in foaming mold comprises the following steps:
step one, preparing a glass fiber/polyether-ether-ketone composite material: melting and blending the glass fiber and the polyether-ether-ketone in a double-screw extruder according to a certain proportion, and extruding and granulating to obtain glass fiber/polyether-ether-ketone composite material granules;
step two, preparing a foaming module: filling glass fiber/polyether-ether-ketone composite material granules in a mould, then placing the mould in a high-pressure kettle keeping dry, fixing the mould in the middle of the kettle, and then sealing the kettle; injecting carbon dioxide gas into the kettle for multiple times by using a high-pressure metering pulse pump and discharging the carbon dioxide gas, thereby removing residual air in the kettle; continuously injecting carbon dioxide gas into the kettle by using a high-pressure pump for pressurization until the pressure in the kettle reaches a set saturation pressure value; putting the autoclave into a heating device, and starting a temperature regulator to enable a temperature stable value in the autoclave to reach a saturated temperature value; after the glass fiber/polyether-ether-ketone composite material granules in the kettle are in a saturated condition for a certain time, regulating and controlling the pressure relief rate through a pressure relief valve to discharge carbon dioxide gas in the kettle; after pressure relief is finished, the kettle is quickly placed in a cooling medium for cooling, and a foaming module is prepared;
step three, preparing the carbon fiber part with the built-in foaming mold: cutting the prepreg into a specified size; wrapping the foam mold with a film; placing the prepreg in a mold, attaching the prepreg to the mold, placing a foaming module in the prepreg, closing and fastening the mold, moving the mold into a heating device to heat for a period of time, and curing and molding the foaming module in the heating process to obtain a carbon fiber part with a built-in foaming mold; and when the curing forming end time is reached, moving the carbon fiber part of the built-in foaming mold out of the heating device, placing the carbon fiber part on a cooling table, cooling the mold to 50 +/-5 ℃, moving the mold to a working platform, opening the mold, and taking out the formed carbon fiber part of the built-in foaming mold.
Preferably, the mass ratio of the glass fiber to the polyetheretherketone in the glass fiber/polyetheretherketone composite pellets is 1:5.
Preferably, the processing temperature of the double-screw extruder is 370 to 380 ℃, and the screw rotating speed is 350 to 550r/min.
Preferably, the cooling temperature of the cooling table is 10 +/-5 ℃, and the cooling time is 6 to 8min.
Preferably, the heating temperature in the heating device is 150 +/-5 ℃, and the heating time is 20 to 60min.
Preferably, the foaming mold component is smaller than the carbon fiber component with the built-in foaming mold by 0.8 to 1.0mm.
Preferably, the prepreg is prepared by epoxy resin glue mold and carbon fiber.
Preferably, the mass percentage of the epoxy resin rubber mold in the prepreg is 30 to 50 percent.
Preferably, the saturation pressure is 20MPa and the saturation temperature is 337.5 ℃.
Example 7
A preparation process of a carbon fiber part with a built-in foaming mold comprises the following steps:
step one, preparing a glass fiber/polyether-ether-ketone composite material: melting and blending the glass fiber and the polyether-ether-ketone in a double-screw extruder according to a certain proportion, and extruding and granulating to obtain glass fiber/polyether-ether-ketone composite material granules;
step two, preparing a foaming module: filling glass fiber/polyether-ether-ketone composite material granules in a mould, then placing the mould in a high-pressure kettle keeping dry, fixing the mould in the middle of the kettle, and then sealing the kettle; injecting carbon dioxide gas into the kettle for multiple times by using a high-pressure metering pulse pump and discharging the carbon dioxide gas, thereby removing residual air in the kettle; continuously injecting carbon dioxide gas into the kettle by using a high-pressure pump for pressurization until the pressure in the kettle reaches a set saturation pressure value; putting the autoclave into a heating device, and starting a temperature regulator to enable a temperature stable value in the autoclave to reach a saturated temperature value; after the glass fiber/polyether-ether-ketone composite material granules in the kettle are in a saturated condition for a certain time, regulating and controlling the pressure relief rate through a pressure relief valve and discharging carbon dioxide gas in the kettle; after pressure relief is finished, the kettle is quickly placed in a cooling medium for cooling, and a foaming module is prepared;
step three, preparing the carbon fiber part with the built-in foaming mold: cutting the prepreg into a specified size; wrapping the foam mold with a film; placing the prepreg in a mold, attaching the prepreg to the mold, placing a foaming module in the prepreg, closing and fastening the mold, moving the mold into a heating device to heat for a period of time, and curing and molding the foaming module in the heating process to obtain a carbon fiber part with a built-in foaming mold; and when the curing molding finishing time is reached, removing the carbon fiber part with the built-in foaming mold from the heating device, placing the carbon fiber part on a cooling table, cooling the mold to 50 +/-5 ℃, moving the mold to a working platform, opening the mold, and taking out the molded carbon fiber part with the built-in foaming mold.
Preferably, the mass ratio of the glass fiber to the polyetheretherketone in the glass fiber/polyetheretherketone composite pellets is 1:5.
Preferably, the processing temperature of the double-screw extruder is 370 to 380 ℃, and the screw rotating speed is 350 to 550r/min.
Preferably, the cooling temperature of the cooling table is 10 +/-5 ℃, and the cooling time is 6 to 8min.
Preferably, the heating temperature in the heating device is 150 +/-5 ℃, and the heating time is 20 to 60min.
Preferably, the foaming mold component is smaller than the carbon fiber component with the built-in foaming mold by 0.8 to 1.0mm.
Preferably, the prepreg is prepared by epoxy resin glue mold and carbon fiber.
Preferably, the mass percentage of the epoxy resin rubber mold in the prepreg is 30 to 50 percent.
Preferably, the saturation pressure is 20MPa and the saturation temperature is 340 ℃.
As shown in the attached figure 1 of the specification, the volume expansion rate of the foaming module shows a trend of increasing and then decreasing along with the increase of the saturation temperature, because the saturation temperature is increased, the cell size is increased, the cell wall is thinned, most of the glass fibers are distributed in the cell wall, and because the carbon dioxide which is quickly released drives the cells to nucleate and grow in the foaming process, the glass fibers in the high-temperature melt are oriented at the stage and are selectively distributed in the cell wall, and under the arrangement, the fibers in the cell wall are exactly lapped into a structure similar to a fiber skeleton, so that the temperature of the cell structure in the foaming module is enhanced to a certain degree; for the integral foaming module, the beneficial performances such as mechanical property, high temperature resistance and the like are inevitably improved; the temperature range suitable for foaming is 330 to 337.5, the maximum volume expansion rate of the foam sample is 3.43 when the saturation temperature is 337.5, and the foaming upper limit temperature is 340 ℃.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.

Claims (2)

1. A preparation process of a carbon fiber part with a built-in foaming mold is characterized by comprising the following steps:
step one, preparing a glass fiber/polyether-ether-ketone composite material: melting and blending the glass fiber and the polyether-ether-ketone in a double-screw extruder according to a certain proportion, and extruding and granulating to obtain glass fiber/polyether-ether-ketone composite material granules;
step two, preparing a foaming module: filling glass fiber/polyether-ether-ketone composite material granules in a mould, then placing the mould in a high-pressure kettle keeping dry, fixing the mould in the middle of the kettle, and then sealing the kettle; injecting carbon dioxide gas into the kettle by using a high-pressure metering pulse pump and discharging the carbon dioxide gas; continuously injecting carbon dioxide gas into the kettle by using a high-pressure pump for pressurization until the pressure in the kettle reaches a set saturation pressure value; putting the autoclave into a heating device, and starting a temperature regulator to enable a temperature stable value in the autoclave to reach a saturated temperature value; after the glass fiber/polyether-ether-ketone composite material granules in the kettle are in a saturated condition for a certain time, regulating and controlling the pressure relief rate through a pressure relief valve to discharge carbon dioxide gas in the kettle; after pressure relief is finished, quickly placing the kettle in a cooling medium for cooling, and obtaining a foaming module;
step three, preparing the carbon fiber part with the built-in foaming mold: cutting the prepreg into a specified size; wrapping the foam mold with a film; placing the prepreg in a mold, attaching the prepreg to the mold, placing a foaming module in the prepreg, closing and fastening the mold, moving the mold into a heating device to heat for a period of time, and curing and molding the foaming module in the heating process to obtain a carbon fiber part with a built-in foaming mold; when the curing molding finish time is reached, the carbon fiber part with the built-in foaming mold is removed from the heating device and is placed on a cooling table, when the temperature of the mold is cooled to 50 +/-5 ℃, the mold is moved to a working platform, the mold is opened, and the molded carbon fiber part with the built-in foaming mold is taken out;
the mass ratio of the glass fiber to the polyether-ether-ketone in the glass fiber/polyether-ether-ketone composite material granules is 1:5, the processing temperature of a double-screw extruder is 370-380 ℃, the screw rotating speed is 350-550 r/min, the cooling temperature of a cooling table is 10 +/-5 ℃, the cooling time is 6-8 min, the heating temperature in a heating device is 150 +/-5 ℃, the heating time is 20-60 min, the size of a foaming module is 0.8-1.0 mm smaller than that of a carbon fiber part with a built-in foaming mold, the prepreg is prepared from an epoxy resin mold and carbon fibers, and the epoxy resin mold accounts for 30-50% by mass.
2. The preparation process of the carbon fiber part with the built-in foaming mold according to claim 1, wherein the saturation pressure is 20MPa, and the saturation temperature is 325-340 ℃.
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