CN113021946A - Preparation method of low-cost thermoplastic composite material pipe - Google Patents
Preparation method of low-cost thermoplastic composite material pipe Download PDFInfo
- Publication number
- CN113021946A CN113021946A CN202110272304.3A CN202110272304A CN113021946A CN 113021946 A CN113021946 A CN 113021946A CN 202110272304 A CN202110272304 A CN 202110272304A CN 113021946 A CN113021946 A CN 113021946A
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- China
- Prior art keywords
- temperature
- vacuum bag
- low
- bag film
- thermoplastic composite
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Classifications
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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
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/30—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core
- B29C70/34—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation
- B29C70/342—Shaping by lay-up, i.e. applying fibres, tape or broadsheet on a mould, former or core; Shaping by spray-up, i.e. spraying of fibres on a mould, former or core and shaping or impregnating by compression, i.e. combined with compressing after the lay-up operation using isostatic pressure
-
- 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
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
Abstract
A low-cost thermoplastic composite material pipe is prepared through preparing high-temp shaping region as middle segment of circular pipe mould, preparing low-temp sealing region at both ends, preparing pre-immersed circular pipe prefabricated body by copying and braiding, preparing sealing adhesive by vacuum bag film, coating internal and external vacuum bag films, and vacuum bag shaping. The pipe molding method provided by the invention is easy to demould after molding, the fiber orientation of the product is easy to control, the requirements can be met by adopting conventional sealant, the requirements on equipment are reduced, and the production cost is effectively reduced.
Description
Technical Field
The invention belongs to the field of composite materials, and relates to a preparation method of a low-cost thermoplastic composite material pipe.
Background
The fiber-reinforced high-temperature-resistant thermoplastic composite pipe has the advantages of light weight, high strength, good creep resistance, high temperature resistance, chemical corrosion resistance and the like, and is gradually used in the fields of aviation, aerospace and the like as a high-performance new material. The fiber reinforced thermoplastic composite material taking special engineering plastics such as polyphenylene sulfide, polyether ether ketone, high temperature resistant nylon and the like as a matrix has high molding temperature, large resin viscosity and difficult molding, and the traditional molding processes such as winding, pultrusion, vacuum diversion and the like are difficult to be used for processing and molding the high temperature resistant thermoplastic composite material pipe. The compression molding process has high requirements on temperature control of molding equipment, high temperature resistance of a circular tube core mold, demolding of the core mold and the like, the processing cost is high, and the fiber orientation of a compression molding product is difficult to control, so that the mechanical property of the product is influenced.
Disclosure of Invention
The invention aims to provide a preparation method of a low-cost thermoplastic composite material pipe, which solves the problems of difficult molding, high cost and difficult control of fiber orientation of the high-temperature resistant thermoplastic composite material pipe.
In order to solve the technical problems, the provided technical method specifically comprises the following steps:
a preparation method of a low-cost thermoplastic composite material pipe is characterized in that the composite material pipe is prepared by a method of vacuum bag pressing molding after profile modeling weaving. The middle section of the circular tube mold is a high-temperature forming area, two ends of the circular tube mold are low-temperature sealing areas, the high-temperature forming area is a pre-impregnated circular tube preform profiling weaving area, the low-temperature sealing area is a sealant sealing vacuum bag film area, and the concrete forming steps are as follows:
(1) coating an inner layer vacuum bag film on the surface of the circular tube mould, wherein the vacuum bag film is a continuous film material with two ends positioned in a low-temperature sealing area;
(2) weaving a circular tube preform by a thermoplastic composite prepreg tape outside a vacuum bag film in a high-temperature forming area;
(3) after the prefabricated part is woven, annularly sticking sealant on low-temperature sealing areas at two ends, and then laying vacuumizing auxiliary materials;
(4) coating an outer layer vacuum bag film, wherein the vacuum bag film is a continuous film material with two ends positioned in a low-temperature sealing area, sealing the inner layer vacuum bag film and the outer layer vacuum bag film, vacuumizing and maintaining pressure;
(5) heating to the melting point of the prepreg tape under the pressure maintaining condition, cooling and demoulding to obtain the composite material pipe.
Preferably, the temperature of the low-temperature area of the circular tube mold is 20-200 ℃; the high temperature zone can be rapidly heated and cooled, and the temperature can be heated to 400 ℃.
Preferably, the vacuum bag film is a special round tube-shaped high-temperature-resistant vacuum bag film, and the melting point of the vacuum bag film-the melting point of the prepreg tape is more than or equal to 60 ℃.
Preferably, the temperature of the sealing gum melting point-low temperature region is more than or equal to 20 ℃.
Preferably, the prepreg tape is a continuous carbon fiber reinforced special engineering plastic-based composite material, the thickness of the prepreg tape sheet is 0.1-0.5mm, the width of the prepreg tape sheet is 4-20mm, and the fiber content is 25% -70%.
Preferably, in the step (5), the thermoforming temperature is 15-35 ℃ higher than the melting point of the prepreg tape.
Furthermore, the preparation method can also be used for forming other fiber reinforced thermoplastic composite pipes.
The invention has the beneficial effects that: compared with the prior art, the invention provides the method for molding the thermoplastic composite material pipe by vacuum bag pressure molding, which is easy to operate and has high performance, the pipe is easy to demould after molding, the fiber orientation of the product is easy to control, and the performance of the product is further improved.
The molding method provided by the invention can meet the requirements by adopting the conventional sealant, simultaneously reduces the requirements on equipment and effectively reduces the production cost.
Drawings
FIG. 1 is a schematic view of a circular tube mold wrapping an inner vacuum bag film;
FIG. 2 is a schematic view of the template after weaving and sealant application;
FIG. 3 is a schematic view of a vacuum bag film coated with an outer layer.
Labeled as: 1: a circular tube mold; 2: an inner vacuum bag film; 3: a round pipe preform; 4: sealing glue; 5: and an outer layer of vacuum bag film.
Detailed Description
In order to better understand the present invention, the following examples are further provided to illustrate the present invention, but the present invention is not limited to the following examples.
Example 1
The method adopts 12K carbon fiber yarns as a continuous reinforcement and polyphenylene sulfide (PPS) resin as a thermoplastic matrix material to prepare the continuous fiber reinforced PPS composite pipe, and comprises the following specific preparation steps:
(1) coating an inner layer vacuum bag film 2 on the surface of the circular tube mould 1, wherein the vacuum bag film is a continuous film material with two ends positioned in a low-temperature sealing area;
the outer diameter of the circular tube die 1 is 80mm, the length of the vacuum bag film 2 is 1000mm, the length of the low-temperature sealing area is 100mm, and the length of the high-temperature forming area is 800 mm;
(2) weaving a circular tube preform 3 outside a vacuum bag film in a high-temperature forming area by a thermoplastic composite prepreg tape in a profiling mode;
the width of the prepreg tape is 8.15mm, the thickness is 0.3mm, the fiber mass content is 60%, the preform is woven by adopting an 2/2 twill weave structure, and the length is 750 mm;
(3) after the prefabricated part is woven, annularly sticking sealing glue 4 on low-temperature sealing areas at two ends, and then laying vacuum-pumping auxiliary materials;
(4) coating an outer layer vacuum bag film 5, wherein the vacuum bag film is a continuous film material with two ends positioned in a low-temperature sealing area, sealing the inner layer vacuum bag film 2 and the outer layer vacuum bag film 5, vacuumizing, and maintaining pressure for 30 min;
(5) and rapidly heating the mould to 320 ℃ under the pressure maintaining condition, maintaining the pressure and preserving the heat for 5min, then rapidly cooling to room temperature, and demoulding to obtain the composite material pipe.
The performance parameters of the composite tube prepared by the technical method provided by the invention are shown in the following table:
table 1 composite pipe performance parameters prepared in the examples
Claims (7)
1. A low-cost thermoplastic composite material pipe preparation method, wherein, the composite material pipe adopts the vacuum bag after the profiling is woven to press the method to prepare; the middle section of the circular tube mold is a high-temperature forming area, two ends of the circular tube mold are low-temperature sealing areas, the high-temperature forming area is a pre-impregnated circular tube preform profiling weaving area, the low-temperature sealing area is a sealant sealing vacuum bag film area, and the concrete forming steps are as follows:
(1) coating an inner layer vacuum bag film on the surface of the circular tube mould, wherein the vacuum bag film is a continuous film material with two ends positioned in a low-temperature sealing area;
(2) weaving a circular tube preform by a thermoplastic composite prepreg tape outside a vacuum bag film in a high-temperature forming area;
(3) after the prefabricated part is woven, annularly sticking sealant on low-temperature sealing areas at two ends, and then laying vacuumizing auxiliary materials;
(4) coating an outer layer vacuum bag film, wherein the vacuum bag film is a continuous film material with two ends positioned in a low-temperature sealing area, sealing the inner layer vacuum bag film and the outer layer vacuum bag film, vacuumizing and maintaining pressure;
(5) heating to the melting point of the prepreg tape under the pressure maintaining condition, cooling and demoulding to obtain the composite material pipe.
2. A method of making a low cost thermoplastic composite tube as claimed in claim 1, wherein: the temperature of the low-temperature area of the circular tube die is 20-200 ℃, the high-temperature area can be rapidly heated and cooled, and the heating temperature can be up to 400 ℃.
3. A method of making a low cost thermoplastic composite tube as claimed in claim 1, wherein: the vacuum bag film is a special round tube-shaped high-temperature-resistant vacuum bag film, and the melting point of the vacuum bag film-the melting point of the prepreg tape is more than or equal to 60 ℃.
4. A method of making a low cost thermoplastic composite tube as claimed in claim 1, wherein: the melting point-low temperature region temperature of the sealant is more than or equal to 20 ℃.
5. A method of making a low cost thermoplastic composite tube as claimed in claim 1, wherein: the prepreg tape is a continuous carbon fiber reinforced special engineering plastic-based composite material, the thickness of the prepreg tape sheet is 0.1-0.5mm, the width of the prepreg tape sheet is 4-20mm, and the fiber content is 25% -70%.
6. The method for forming a high temperature resistant thermoplastic composite pipe as claimed in claim 1, wherein: in the step (5), the heating and forming temperature is 15-35 ℃ higher than the melting point of the prepreg tape.
7. The method of claims 1-6 can also be used for forming other types of fiber reinforced thermoplastic composite pipes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110272304.3A CN113021946A (en) | 2021-03-12 | 2021-03-12 | Preparation method of low-cost thermoplastic composite material pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110272304.3A CN113021946A (en) | 2021-03-12 | 2021-03-12 | Preparation method of low-cost thermoplastic composite material pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113021946A true CN113021946A (en) | 2021-06-25 |
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ID=76468643
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110272304.3A Withdrawn CN113021946A (en) | 2021-03-12 | 2021-03-12 | Preparation method of low-cost thermoplastic composite material pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113021946A (en) |
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2021
- 2021-03-12 CN CN202110272304.3A patent/CN113021946A/en not_active Withdrawn
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Application publication date: 20210625 |