CN114834077A - Light insulating composite core rod and preparation method thereof - Google Patents
Light insulating composite core rod and preparation method thereof Download PDFInfo
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- CN114834077A CN114834077A CN202210458584.1A CN202210458584A CN114834077A CN 114834077 A CN114834077 A CN 114834077A CN 202210458584 A CN202210458584 A CN 202210458584A CN 114834077 A CN114834077 A CN 114834077A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0046—Producing rods
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0003—Producing profiled members, e.g. beams
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
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- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
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Abstract
The invention discloses a light insulating composite core rod, which comprises an insulating composite core layer and a glass fiber reinforced resin matrix composite layer, wherein the glass fiber reinforced resin matrix composite layer is wrapped on the outer side of the insulating composite core layer; the insulating composite core layer is a resin and microbead composite material cylinder, and the glass fiber reinforced resin matrix composite material layer and the insulating composite core layer are solidified into a whole. The invention has the technical advantages of simple structure, convenient operation, low cost, safe structure, few interface defects and the like.
Description
Technical Field
The invention relates to the technical field of insulating composite materials, in particular to a light insulating composite core rod and a preparation method thereof.
Background
Electrical insulating materials and equipment are often corroded by severe weather conditions such as sunlight, rain, wind, sand, high temperature and severe cold when operated outdoors for a long time, and high requirements are provided for insulating cores of insulators and cross arms, including excellent moisture penetration resistance, high and low temperature resistance, high insulating property and ageing resistance. Especially for the core body of the large-span composite insulating cross arm and the large-size composite post insulator. At present, large-size insulating cores for composite insulating cross arms and insulating struts at home and abroad mainly comprise single-core pultrusion, pultrusion outer winding, multi-core pultrusion, hollow filling and other schemes. 1) Single core pultrusion schemes. The production process has high automation degree, is less influenced by human factors, can continuously produce the fiber yarns without limit in length, needs a large-area for placing a creel to supply the fiber yarns, has longer infiltration time of the fiber yarns, slow large-size pultrusion speed, poor curing uniformity degree inside the core body and higher technical requirements. 2) And (3) pultrusion and external winding process scheme. The bending modulus of the internal support core rod is small, and the deformation amount is large in the operation process. And need many times to twine and solidify, many times of processing when outer winding, its process is complicated, production cycle is long and the cost is higher, simultaneously, axial fiber ratio is difficult to control, the core porosity is higher, and difficult control, twine many times in addition and lead to the plug internal interface more. 3) A multicore pultrusion scheme. The processing requirements for the inner wall of the composite material pipe and each thin core rod are very strict, and the requirements for the viscosity of resin for pouring and the toughness of the cured resin casting are higher. Since there are numerous resin rich zones inside the post and multiple interfaces, these resin rich zones and interfaces are weak points inside the post mandrel. The core manufactured by the schemes has high quality, and the latter two methods also need secondary treatment to polish the surface of the core rod and coat a layer of special coupling agent on the surface, so that the interface problem is easy to generate. The quality of the insulating core body is effectively reduced by adopting the hollow pipe filled with insulating gas or insulating ointment inside, represented by the March power, but the hidden danger of leakage and condensation of internal filling materials is generated, the operation and maintenance cost is increased, and the application of the insulating core body in a power system is limited. At present, the large-size composite material solid core rod in the market is mainly based on the first and second process schemes.
The fiber reinforced composite solid rod produced by the pultrusion or pultrusion winding process has excessive and abundant weight, cannot fully utilize the advantages of light weight and high strength of the fiber reinforced composite, and has high cost and extremely low productivity. Therefore, how to fully exert the technical advantages of the composite material becomes a difficult point in the research of the field by developing a light-weight high-insulation large-size composite material core rod technology.
Disclosure of Invention
The invention aims to provide a light insulating composite core rod and a preparation method thereof, and the light insulating composite core rod has the technical advantages of simple structure, convenience in operation, low cost, safe structure, few interface defects and the like. The core rod is used for a composite insulating cross arm or an insulator support of a power transmission and distribution line with the voltage grade of 35-500 kV.
In order to achieve the purpose, the light insulating composite core rod comprises an insulating composite core layer and a glass fiber reinforced resin matrix composite layer, wherein the glass fiber reinforced resin matrix composite layer is wrapped on the outer side of the insulating composite core layer; the insulating composite core layer is a resin and microbead composite material cylinder, and the glass fiber reinforced resin matrix composite material layer and the insulating composite core layer are solidified into a whole.
The preparation method comprises the following steps:
step 1: wrapping the glass fiber soaked with the resin sizing material outside the resin and microbead composite material cylinder by using a dipping and guiding device of a pultrusion process, a pultrusion winding process, a pultrusion weaving process or a winding process to form a glass fiber reinforced resin matrix composite material prepolymerization layer;
step 2: and (3) solidifying the pre-polymerization layer of the glass fiber reinforced resin matrix composite and the cylinder of the microbead composite into a whole through a pultrusion solidifying device.
In order to make the interface between the outer layer of the glass fiber reinforced resin matrix composite material structure layer and the inner composite core body more compact, a layer of glass fiber felt/resin matrix composite material layer can be added between the outer layer of the glass fiber reinforced resin matrix composite material layer and the inner layer of the light high-insulation composite core body layer to form a three-layer structure, and the glass fiber felt rich in resin is fully contacted and cured with the inner interface and the outer interface by utilizing the excellent wettability and compatibility of the glass fiber felt and the resin to form a stable compact interface layer. The invention designs another light insulating composite core rod which comprises an insulating composite core layer, a glass fiber mat and resin matrix composite layer and a glass fiber reinforced resin matrix composite layer, wherein the glass fiber mat and resin matrix composite layer are wrapped outside the insulating composite core layer, the glass fiber reinforced resin matrix composite layer is wrapped outside the glass fiber mat and resin matrix composite layer, and the insulating composite core layer, the glass fiber mat and resin matrix composite layer and the glass fiber reinforced resin matrix composite layer are finally cured into a whole.
The preparation method comprises the following steps:
step A: wrapping the glass fiber mat soaked with the resin sizing material outside the resin and microbead composite material cylinder by using a dipping and guiding device of a pultrusion process, a pultrusion winding process, a pultrusion weaving process or a winding process to form a pre-polymerization layer of the glass fiber mat and the resin-based composite material;
and B: wrapping the glass fiber soaked with the resin sizing material outside a pre-polymerization layer of a glass fiber felt and a resin-based composite material through a dipping and guiding device of a pultrusion process, a pultrusion winding process, a pultrusion weaving process or a winding process to form a pre-polymerization layer of a glass fiber reinforced resin-based composite material;
and C: and the resin and microbead composite material cylinder, the glass fiber mat and resin matrix composite material pre-polymerization layer and the glass fiber reinforced resin matrix composite material pre-polymerization layer are solidified into a whole through a pultrusion curing device.
The invention has the beneficial effects that:
1. the light high-insulation composite core rod prepared by the method has low density, realizes the functions of light weight and high strength, and the density of the product is reduced more along with the increase of the diameter of the composite material rod; because the product prepared by the invention comprises two parts, the density of the inside of the product is 0.3-0.6 g/cm 3 The outer portion of the resin composite core has a density of about 2.1 to 2.2g/cm 3 A fiber reinforced resin based composite material; taking a fiber reinforced resin composite material solid rod with the diameter of 100mm as an example, the density of the fiber reinforced resin composite material solid rod is 2.1-2.2g/cm 3 The weight of a 900mm long solid rod is 13.8 kg; the composite core rod prepared by the method has the diameter of 100mm, the wall thickness of 10mm and the insulating composite core inside, and the density of the insulating composite core at the inner layer is 0.3-0.6 g/cm 3 The weight of a product with the length of 900cm is 7.6kg, the corresponding weight is reduced by 45 percent, and the average density of the product is reduced by 1.15 to 1.20g/cm 3 。
2. The composite core pultrusion, pultrusion winding, pultrusion weaving or winding process of the light high-insulation composite core rod has high production efficiency, the interfaces of the inner layer, the middle layer and the outer layer are rich in resin, and interface defects are few after the resin interfaces are integrally thermocured and fused.
3. The outermost layer of fibers rich in resin sizing material, the middle layer of glass fiber felt and the inner layer of high-insulation composite core body are integrally molded through resin thermosetting to form a stable and compact interface, so that the requirements of a light high-insulation composite core body rod for a related inner insulation electrical material through pigment permeation, water diffusion and heat induction are met, the inner high-insulation composite core body has certain mechanical strength, the average value of the tensile strength, the compressive strength and the bending strength exceeds 22MPa, the corresponding average modulus value of the tensile strength, the compressive strength and the bending strength is larger than 625MPa, the composite core rod can meet the requirements of a silicone rubber hot-press joint and end flange sleeve press joint test, the core material and the inner part of the composite core rod are free from cracking and interface separation after the composite core rod is pressed, the inner high-insulation composite core body is a casting body of micro-nano beads and resin, and the beads can effectively absorb the damage energy generated by vibration, and ensuring that the sample interface is still intact after 20 ten thousand times of low-cycle vibration fatigue.
4. The appearance size of the sample can be processed into different shapes and sizes according to the requirement, and the sample can be in a circular, square, rectangular, oval or polygonal structure, and is produced in a customized manner according to a die of a pultrusion or winding process.
5. The internal high-insulation composite core has certain mechanical strength, the microbead composite layer can effectively absorb damage energy through microbeads, and after the microbead composite layer and the outer composite glass fiber reinforced plastic structure layer are in synergistic effect, the technical problem that the material stress is concentrated and is locally easy to crack after the composite member is opened is solved.
The invention has the technical advantages of simple structure, convenient operation, low cost, safe structure and the like.
Drawings
FIG. 1 is a schematic structural view of example 1;
FIG. 2 is a side view of FIG. 1;
FIG. 3 is a schematic structural view of example 2;
FIG. 4 is a side view of FIG. 3;
FIG. 5 is a schematic structural view of example 3;
fig. 6 is a side view of fig. 5.
The composite material comprises 1-an insulating composite core layer, 2-a glass fiber felt and resin-based composite material layer and 3-a glass fiber reinforced resin-based composite material layer.
Detailed Description
The invention is described in further detail below with reference to the following figures and specific examples:
the lightweight insulating composite core rod of examples 1 and 2, as shown in fig. 1, comprises an insulating composite core layer 1 and a glass fiber reinforced resin based composite material layer 3, wherein the glass fiber reinforced resin based composite material layer 3 is wrapped outside the insulating composite core layer 1; the insulating composite core layer 1 is a resin and microbead composite cylinder, the glass fiber reinforced resin matrix composite layer 3 and the insulating composite core layer 1 are solidified into a whole, the appearance diameter of the light composite insulating core rod is 100mm, the diameter of the resin and microbead composite cylinder is 80mm, the glass fiber reinforced resin matrix composite layer 3 is of a tubular structure, and the thickness of the glass fiber reinforced resin matrix composite layer is 10 mm. The shrinkage rate change before and after the used resin is cured or after the used resin is cooled is small, the structure of the embodiment 1 is proposed, the structure is simpler, the economy is better, the phenomenon that the yield is high before and after the resin is cured or before and after the resin is cooled, and the interface separation phenomenon of the insulating composite core layer 1 and the glass fiber reinforced resin matrix composite material layer 3 is caused.
In the technical scheme, the density range of the resin and microbead composite material cylinder is 0.3-0.6 g/cm 3 The density of the glass fiber reinforced resin-based composite material layer 3 is 2.2g/cm 3 The surface roughness Ra value range of the resin and microbead composite cylinder is 10-100 microns, and the electrical breakdown strength of the resin and microbead composite cylinder is not lower than 10 kV/mm;
the material of the resin and microbead composite cylinder is a polymer composite material of 25-55 wt% of thermosetting resin and 45-75 wt% of micro-nano polymer microbeads;
or the material of the resin and microsphere composite cylinder is a polymer composite material of 25-55 wt% of thermosetting resin and 45-75 wt% of hollow inorganic microspheres;
or the material of the resin and microbead composite cylinder is a polymer composite material of 25-55 wt% of thermoplastic resin and 45-75 wt% of micro-nano polymer microbeads;
or the material of the resin and microsphere composite cylinder is a polymer composite material of 25-55 wt% of thermoplastic resin and 45-75 wt% of hollow inorganic microspheres.
The composite material of the hollow microspheres and the polymer replaces the original solid rod composite material, and the characteristics of light weight and high insulation of the hollow microspheres and the polymer composite material are utilized, so that compared with a solid composite rod, the weight of the solid rod composite material can be obviously reduced, the internal insulation strength of the composite core rod can be improved, and the problems of overlarge solid rod size, difficulty in control of a curing process and internal cracking or local defects are solved.
In the above technical scheme, the heat resistance of the thermosetting resin and the thermoplastic resin is not lower than 150 ℃.
In the above technical scheme, the thermosetting resin is unsaturated resin, vinyl resin, epoxy resin, polyurethane resin, phenolic resin, urea-formaldehyde resin, polyimide resin, urea-formaldehyde resin, bismaleimide resin, silicone resin or melamine resin.
In the technical scheme, the thermoplastic resin is polycarbonate resin, nylon resin, polyvinyl chloride resin, polyether ether ketone resin, polybenzoxazine resin, polyphenylene sulfide resin, polyformaldehyde resin or inkstone resin, and the addition amount of the thermoplastic resin is 25-55 wt% of the mass of the composite material of the hollow microspheres and the polymer.
The hollow inorganic microspheres are glass microspheres, silicon carbide microspheres, corundum microspheres or titanium borosilicate microspheres, and the addition amount of the hollow inorganic microspheres is 45-75 wt% of the mass of the composite material of the hollow microspheres and the polymer.
The micro-nano polymer beads are polyacrylonitrile beads, polymethyl methacrylate beads, phenolic beads or vinylidene chloride copolymer beads, and the addition amount of the micro-nano polymer beads is 45-75 wt% of the mass of the composite material of the hollow beads and the polymer.
The specific addition amount of the resin and the microbeads is determined according to the viscosity of the resin, the compatibility of the microbeads and the resin, and the performance and the processability of the added material; generally, the smaller the viscosity of the resin or the viscosity after melting, the better the compatibility between the beads and the resin, the larger the amount of the corresponding beads added, the lower the amount of the corresponding resin added, and the smaller the density of the composite material of the corresponding resin and the beads.
The preparation method of example 1 comprises the following steps:
step 1: wrapping the glass fiber soaked with the resin sizing material outside the resin and microbead composite material cylinder by using a dipping and guiding device of a pultrusion process, a pultrusion winding process, a pultrusion weaving process or a winding process to form a glass fiber reinforced resin matrix composite material prepolymerization layer;
step 2: the glass fiber reinforced resin matrix composite pre-polymerization layer and the microbead composite cylinder are thermally cured into a whole through a pultrusion, winding and other curing devices to form a compact integrated structure.
The light insulating composite core rod shown in embodiment 2, as shown in fig. 3 and 4, includes an insulating composite core layer 1, a glass fiber mat and resin-based composite material layer 2, and a glass fiber reinforced resin-based composite material layer 3, where the glass fiber mat and resin-based composite material layer 2 is wrapped outside the insulating composite core layer 1, the glass fiber reinforced resin-based composite material layer 3 is wrapped outside the glass fiber mat and resin-based composite material layer 2, and the insulating composite core layer 1, the glass fiber mat and resin-based composite material layer 2, and the glass fiber reinforced resin-based composite material layer 3 are cured into a whole. The appearance diameter of the light composite insulating core rod is 100mm, wherein the diameter of the resin and microbead composite material cylinder is 79.5-79.7 mm, the thickness of the glass fiber mat and resin matrix composite material layer 2 is 0.3-0.5 mm, and the thickness of the glass fiber reinforced resin matrix composite material layer 3 is 10 mm. The shrinkage rate of the resin is changed greatly before and after solidification or before and after cooling, the structure of the implementation 2 is proposed, and the buffer effect is started by utilizing the composite material interlayer of the glass fiber felt and the resin, so that the phenomenon of interface separation between the insulating composite core layer 1 and the glass fiber reinforced resin matrix composite material layer 3 caused by the high yield before and after solidification or before and after cooling of the resin is avoided.
The thickness range of the glass fiber felt in the glass fiber felt and resin-based composite material layer 2 is 0.3-0.5 mm, the glass fiber felt must be fully soaked by pultrusion resin liquid before the glass fiber felt is pulled to enter a pultrusion curing device, the fiber felt is kept to be flatly covered on the surface of the insulating composite core layer 1, the fiber felt is prevented from being wrinkled, and the fiber felt and resin composite material after curing has obvious internal defects to influence the internal compactness and the electrical insulation property.
The preparation method of example 2 comprises the following steps:
step A: wrapping the glass fiber mat soaked with the resin sizing material outside the resin and microbead composite material cylinder by using a dipping and guiding device of a pultrusion process, a pultrusion winding process, a pultrusion weaving process or a winding process to form a pre-polymerization layer of the glass fiber mat and the resin-based composite material;
and B: wrapping the glass fiber soaked with the resin sizing material outside a pre-polymerization layer of a glass fiber felt and a resin-based composite material by using a dipping and guiding device of a pultrusion process, a pultrusion winding process, a pultrusion weaving process or a winding process to form a pre-polymerization layer 3 of a glass fiber reinforced resin-based composite material;
and C: the resin and microbead composite material cylinder, the glass fiber felt and resin matrix composite material pre-polymerization layer and the glass fiber reinforced resin matrix composite material pre-polymerization layer are thermally cured into a whole through a pultrusion, winding and other curing devices to form a compact integrated structure.
In the technical scheme, the glass fiber of the outermost glass fiber reinforced resin matrix composite and the glass fiber felt of the intermediate glass fiber reinforced resin matrix composite are fully soaked in the resin base material through the resin glue groove; the outermost layer of fiber rich in resin sizing material and the middle layer of glass fiber felt are uniformly covered on the surface of the innermost layer of the high-insulation composite material core, and the glass fiber felt and the glass fiber on the surface of the composite core are kept flat, uniform and densely covered; and (3) drawing the high-insulation core rod, the glass fiber felt and the surface glass fiber into a curing mold of pultrusion or winding equipment together, and performing high-temperature curing and shaping to obtain the composite insulation core rod with the corresponding size.
In the technical scheme, the composite core rod with the maximum diameter less than 400mm is produced by pultrusion, pultrusion winding or pultrusion weaving processes, and the composite core rod with higher requirement on the circumferential strength is produced by pultrusion winding or pultrusion weaving processes as much as possible; and for the composite core rod with the diameter larger than 400mm, a winding process is adopted to avoid the technical problems of large size and overlarge weight of the composite material, which cause the eccentricity of the composite material pipe wall or insufficient resin infiltration in the pultrusion process.
The composite core pultrusion, pultrusion winding, pultrusion weaving or winding process of the composite light high-insulation composite core rod has high production efficiency, the interfaces of the inner layer, the middle layer and the outer layer are rich in resin, and the interface defects are few after the resin interfaces are integrated and thermally cured and fused, so that the technical requirement on the internal insulation of electrical equipment can be met.
The preparation method relieves the technical problem that the stress concentration of the material is locally easy to crack after the composite material member is perforated, the internal polymer core of the composite core plate has certain strength and rigidity, the strength and rigidity of the perforated part can be enhanced, the application range of the composite material is expanded, and the difficult problem of perforated connection of the composite material member nodes is relieved.
A lightweight insulating composite core rod as described in example 3, as shown in fig. 5 and 6, has substantially the same structure as in example 1, except that the glass fiber reinforced resin based composite material layer 3 has a square appearance with a side length of 100mm, a circular interior with a radius of 40mm, and is located at the center of the square, and the diameter of the resin and microbead composite cylinder is 80 mm. The composite material core rod can be used for a core rod of a composite insulating cross arm or an insulator pillar for a circular composite material core rod, and can be used for an insulating structural member of a power transformation framework or a truss type composite material tower for a rectangular or polygonal shape.
Details not described in this specification are within the skill of the art that are well known to those skilled in the art.
Claims (10)
1. A light insulating composite core rod is characterized in that: the composite insulation core comprises an insulation composite core layer (1) and a glass fiber reinforced resin matrix composite material layer (3), wherein the glass fiber reinforced resin matrix composite material layer (3) is wrapped on the outer side of the insulation composite core layer (1); the insulating composite core layer (1) is a resin and microbead composite material cylinder, and the glass fiber reinforced resin matrix composite material layer (3) and the insulating composite core layer (1) are solidified into a whole.
2. The lightweight insulating composite core rod of claim 1, wherein: the density range of the resin and microbead composite material cylinder is 0.3-0.6 g/cm 3 The surface roughness Ra value range of the resin and microbead composite cylinder is 10-100 micrometers;
the material of the resin and microbead composite cylinder is a polymer composite material of 25-55 wt% of thermosetting resin and 45-75 wt% of micro-nano polymer microbeads;
or the material of the resin and microsphere composite cylinder is a polymer composite material of 25-55 wt% of thermosetting resin and 45-75 wt% of hollow inorganic microspheres;
or the material of the resin and microbead composite cylinder is a polymer composite material of 25-55 wt% of thermoplastic resin and 45-75 wt% of micro-nano polymer microbeads;
or the material of the resin and microsphere composite cylinder is a polymer composite material of 25-55 wt% of thermoplastic resin and 45-75 wt% of hollow inorganic microspheres.
3. The lightweight insulating composite core rod of claim 2, wherein: the thermosetting resin is unsaturated resin, vinyl resin, epoxy resin, polyurethane resin, phenolic resin, urea-formaldehyde resin, polyimide resin, urea-formaldehyde resin, bismaleimide resin, organic silicon resin or melamine resin.
4. The lightweight insulating composite core rod of claim 2, wherein: the thermoplastic resin is polycarbonate resin, nylon resin, polyvinyl chloride resin, polyether-ether-ketone resin, polybenzoxazine resin, polyphenylene sulfide resin, polyformaldehyde resin or inkstone resin.
5. The lightweight insulating composite core rod of claim 2, wherein: the hollow inorganic micro-beads are glass micro-beads, silicon carbide micro-beads, corundum micro-beads or titanium borosilicate micro-beads.
6. The lightweight insulating composite core rod of claim 2, wherein: the micro-nano polymer beads are polyacrylonitrile beads, polymethyl methacrylate beads, phenolic aldehyde beads or vinylidene chloride copolymer beads.
7. The lightweight insulating composite core rod of claim 1, wherein: the glass fiber mat and resin-based composite material layer (2) are wrapped outside the insulating composite core layer (1), the glass fiber reinforced resin-based composite material layer (3) is wrapped outside the glass fiber mat and resin-based composite material layer (2), and the insulating composite core layer (1), the glass fiber mat and resin-based composite material layer (2) and the glass fiber reinforced resin-based composite material layer (3) are solidified into a whole.
8. The lightweight insulating composite core rod of claim 4, wherein: the thickness range of the glass fiber felt in the glass fiber felt and resin-based composite material layer (2) is 0.3-0.5 mm, the glass fiber felt must be fully soaked by pultrusion resin liquid before the glass fiber felt is pulled to enter a pultrusion curing device, and the fiber felt is kept to be covered on the surface of the insulating composite core layer (1) smoothly.
9. A method of making a lightweight insulating composite core rod as set forth in claim 1, including the steps of:
step 1: wrapping the glass fiber soaked with the resin sizing material outside the resin and microbead composite material cylinder by using a dipping and guiding device of a pultrusion process, a pultrusion winding process, a pultrusion weaving process or a winding process to form a glass fiber reinforced resin matrix composite material prepolymerization layer;
step 2: and (3) solidifying the pre-polymerization layer of the glass fiber reinforced resin matrix composite and the cylinder of the microbead composite into a whole through a pultrusion solidifying device.
10. A method of making a lightweight insulating composite core rod as set forth in claim 7, including the steps of:
step A: wrapping the glass fiber mat soaked with the resin sizing material outside the resin and microbead composite material cylinder by using a dipping and guiding device of a pultrusion process, a pultrusion winding process, a pultrusion weaving process or a winding process to form a pre-polymerization layer of the glass fiber mat and the resin-based composite material;
and B, step B: wrapping the glass fiber soaked with the resin sizing material outside a pre-polymerization layer of a glass fiber felt and a resin-based composite material through a dipping and guiding device of a pultrusion process, a pultrusion winding process, a pultrusion weaving process or a winding process to form a pre-polymerization layer of a glass fiber reinforced resin-based composite material;
step C: and the resin and microbead composite material cylinder, the glass fiber mat and resin matrix composite material pre-polymerization layer and the glass fiber reinforced resin matrix composite material pre-polymerization layer are solidified into a whole through a pultrusion curing device.
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| CN104608401A (en) * | 2015-01-14 | 2015-05-13 | 四川强芯电缆材料有限公司 | Preparation method of fiber-reinforced composite mandrel |
| CN109016565A (en) * | 2017-06-12 | 2018-12-18 | 科思创德国股份有限公司 | It is used to prepare the pultrusion method and equipment of fibre reinforced composites |
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