CN116453780A - Insulating rod and preparation process thereof - Google Patents
Insulating rod and preparation process thereof Download PDFInfo
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- CN116453780A CN116453780A CN202310128264.4A CN202310128264A CN116453780A CN 116453780 A CN116453780 A CN 116453780A CN 202310128264 A CN202310128264 A CN 202310128264A CN 116453780 A CN116453780 A CN 116453780A
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Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B17/00—Insulators or insulating bodies characterised by their form
- H01B17/56—Insulating bodies
- H01B17/60—Composite insulating bodies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B19/00—Apparatus or processes specially adapted for manufacturing insulators or insulating bodies
- H01B19/04—Treating the surfaces, e.g. applying coatings
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses an insulating rod and a preparation process thereof, and relates to the technical field of insulating rod preparation.A insulating rod body comprises a core rod, wherein the surface of the core rod is provided with a fiber layer, the surface of the fiber layer is provided with a protective coating, the core rod is molded and prepared into a mold, insulating materials are adopted to process and mold the core rod, then the inner cavity wall of the mold and the surface of the core rod are cleaned, a fiber felt is soaked in foaming resin, then the soaked fiber felt is coated on the surface of the core rod, a fiber dry yarn is coated on the outer side of the fiber felt according to a layering design, and then the core rod is placed in the mold; adopt the mode that the heating tile embraces the mould to heat the mould, carry out the vacuum dehumidification, resin vacuum infusion, pour into the mould with the resin mixture in, impregnate in the fibrous layer: and after the resin is completely soaked in the fiber material, heating, solidifying and forming the resin, and after solidification is finished and cooling is carried out, pulling the core rod out of the die to obtain the insulating rod.
Description
Technical Field
The invention relates to the technical field of insulating rod preparation, in particular to an insulating rod and a preparation process thereof.
Background
The insulating rod is also called as an insulating rod, an insulating pull rod, an operating rod and the like, and consists of a working head, an insulating rod and a grab handle. The high-voltage isolating switch is used for closing or pulling the high-voltage isolating switch, assembling and disassembling the portable grounding wire, and measuring and testing. The outer insulation tube portion of the insulation rod, which is an important component in the high voltage circuit breaker, is generally manufactured using a glass fiber reinforced resin composite material, and it is required to have good insulation properties and high strength, and thus, the material, structure and manufacturing process of the insulation rod are very important, and it is required to have excellent electrical insulation properties and aging resistance.
At present, when the insulating rod is used in wet weather, water body is easy to permeate into fibers outside the insulating rod, so that the insulating performance of the insulating rod is affected, and in the using process of the insulating rod, friction collision is often generated between the insulating rod and an electric switch, so that the insulating rod is easy to bend, a surface protective coating is easy to fall off, and the safety in use is reduced.
Disclosure of Invention
The invention aims to provide an insulating rod and a preparation process thereof, which have the effects of soaking a fiber felt in foaming resin, extruding an internal core rod when the foaming tree expands during heating and curing to form a good sealing effect, reducing the entry of moisture, ensuring that the electrical performance of the insulating rod is not affected by wet weather, and solving the problems in the prior art.
To achieve the above object, the present invention provides an insulating rod comprising:
the insulation rod comprises an insulation rod body, wherein the insulation rod body comprises a core rod, the surface of the core rod is provided with a fiber layer, the fiber layer comprises a fiber felt and fiber dry yarns, the surface of the fiber layer is provided with a protective coating, and two ends of the insulation rod body are respectively provided with a handle part and a working head;
in order to achieve the above object, the present invention provides a process for preparing an insulating rod comprising:
step S1: forming a core rod, preparing a die, adopting an insulating material to process and form the core rod, cleaning the inner cavity wall of the die and the surface of the core rod, drying after cleaning, and smearing a release agent;
step S2: soaking the fiber felt in foaming resin to fill the foaming resin in the fiber felt and on two sides, and then coating the soaked fiber felt on the surface of the core rod;
step S3: coating the fiber dry yarns on the outer side of the fiber mat according to a layering design, forming a fiber layer together with the fiber mat, and then placing the core rod into a die;
step S4: heating the die by adopting a mode of encircling the die by a heating tile, and carrying out vacuum dehumidification on the fiber layer for 3-5 h at 60-90 ℃; mixing epoxy resin, a curing agent and an accelerator, and then vacuum defoaming to obtain a resin mixture.
Step S5: pouring resin in vacuum, pouring the resin mixture obtained in the step 4 into a mould, and dipping the mould into a fiber layer;
step S6: after the resin is fully soaked in the fiber material, regulating the temperature of a heating device to 140-180 ℃, and heating, solidifying and forming the resin for 10-15 hours;
step S7: and (3) after solidification is completed and cooling is carried out, the core rod is pulled out from the die to obtain an insulating rod, and then the surface of the insulating rod is coated with the protective coating.
Optionally, the insulating material in the step S1 consists of 36-52 parts by mass of epoxy resin, 8-14 parts by mass of polyether-ether-ketone, 66,5-9 parts by mass of glass fiber reinforced nylon, 2-4 parts by mass of polyurethane fiber, 3-7 parts by mass of flame retardant, 1-3 parts by mass of initiator, 2-6 parts by mass of inorganic filler, 3-5 parts by mass of plasticizer, 2-4 parts by mass of coupling agent, 1-3 parts by mass of light stabilizer and 1-3 parts by mass of lubricant.
Optionally, the epoxy resin, the curing agent and the accelerator in the step S4 are mixed for 2-4 hours at 45-65 ℃ and 100-300 rpm/min, and vacuum defoamation is carried out for 2-4 hours after the mixing.
Optionally, the insulation rod is subjected to pressure resistance detection after processing, defective products are removed, and safety of the insulation rod in use is guaranteed.
Optionally, after the insulating rod is taken out in step S7, polishing the outer surface of the insulating rod through a polishing device, and cutting the uneven part of the insulating rod through a cutting device to obtain a smooth and flat tubular insulating rod.
Optionally, the resin mixture obtained in the step S4 is poured into the lower port of the mould under the pressure of 0.2-0.4 Mpa, is immersed in the fiber fabric, is poured in vacuum for 0.5-2 h, and is poured with 18-100 g each time, and the total pouring amount is 500-600 g.
Optionally, the protective coating consists of, by mass, 25-35 parts of organic silicon resin, 5-10 parts of polysilicone, 5-8 parts of nano silicon, 30-45 parts of epoxy resin, 3-5 parts of a jewel flower extract, 8-10 parts of a dipstick extract, 2-3 parts of organic bentonite, 2-3 parts of glass flakes, 3-10 parts of silica sol, 15-20 parts of ethyl acetate, 1-5 parts of a processing aid and 2-3 parts of a film forming agent.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the fiber mat is soaked in the foaming resin, and the inner core rod is extruded when the foaming resin expands during heating and curing, so that a good sealing effect is formed, the entry of moisture is reduced, the safety of the insulating rod in use in wet weather is improved, and the fiber mat form a fiber layer together, so that the insulating rod is coated and protected, and the bending resistance and the integral strength of the insulating rod are ensured.
2. According to the invention, the insulating material is used as the base resin by using the epoxy resin and the polyether-ether-ketone, and the epoxy resin and the polyether-ether-ketone can be used cooperatively, and form a net structure after solidification, so that the stability is good, and the prepared insulating bar material has excellent mechanical property, compact structure, good insulativity, and high tensile strength and mechanical property.
3. According to the invention, the protective coating made of various mixed materials is baked and solidified, so that the adhesion of the obtained coating reaches a first level, the electrical insulation property, the radiation resistance, the wear resistance and the aging resistance of the insulating rod can be improved, and the falling-off of the protective coating is effectively reduced.
Drawings
FIG. 1 is an isometric view of a construction of the present invention;
FIG. 2 is a cross-sectional view of the structure of the present invention;
FIG. 3 is a flow chart of the preparation process of the present invention;
FIG. 4 is a graph of the test results of the present invention.
In the figure: 1. an insulating rod body; 2. a handle portion; 3. a working head; 11. a core rod; 12. a fibrous layer; 13. a protective coating.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Embodiment one:
referring to fig. 1 to 4, in this embodiment, an insulating rod is provided, which includes:
the insulation rod body 1, the insulation rod body 1 includes plug 11, and the surface of plug 11 is provided with fibrous layer 12, and fibrous layer 12 includes fibrofelt and dry yarn of fibre, and the surface of fibrous layer 12 is provided with protective coating 13, and the both ends of insulation rod body 1 are provided with handle portion 2 and working head 3 respectively.
Further, the embodiment provides a process for preparing an insulating rod, which comprises the following steps:
step S1: the method comprises the steps of (1) forming a core rod, preparing a die, adopting an insulating material to process and form the core rod 11, cleaning the inner cavity wall of the die and the surface of the core rod 11, drying after cleaning, and smearing a release agent;
step S2: soaking the fiber felt in foaming resin to fill the foaming resin into the fiber felt and at two sides, wherein the resin content is 30-50% after the foaming resin is soaked, and then coating the soaked fiber felt on the surface of the core rod 11;
step S3: coating the fiber dry yarns on the outer side of a fiber mat according to a layering design, forming a fiber layer 12 by the fiber dry yarns and the fiber mat together, and then placing the core rod 11 into a die;
step S4: heating the die by adopting a mode of encircling the die by a heating tile, and carrying out vacuum dehumidification on the fiber layer 12 for 3 hours at 90 ℃; mixing epoxy resin, a curing agent and an accelerator, and then carrying out vacuum defoamation to obtain a resin mixture;
step S5: pouring resin in vacuum, pouring the resin mixture obtained in the step 4 into a mould, and dipping the mould into the fiber layer 12;
step S6: after the resin is fully soaked in the fiber material, regulating the temperature of a heating device to 150 ℃, and heating, curing and forming the resin for 12 hours;
step S7: after solidification, the core rod 11 is pulled out of the die after cooling, an insulating rod is obtained, and then the surface of the insulating rod is coated with the protective coating 13.
Further, in the present embodiment: the fiber mat is soaked in the foaming resin at first, so that the fiber mat is filled with the foaming resin, the foaming resin is heated and foamed during subsequent heating and curing, the foaming resin extrudes the inner core rod 11 during foaming and expansion to form a good sealing effect, the entry of moisture is reduced, the electrical performance of the insulating rod is ensured not to be influenced by wet weather, the fiber mat can be coated by coating the fiber dry yarn and then impregnating the resin matrix, the fiber mat and the fiber mat together form a fiber layer 12, the insulating rod is coated and protected through the fiber layer 12, the bending resistance and the integral strength of the whole insulating rod are ensured, and the breakage of the insulating rod is avoided.
Further, in the present embodiment: the insulating material in the step S1 consists of 42 parts by mass of epoxy resin, 10 parts by mass of polyether-ether-ketone, 66,5 parts by mass of glass fiber reinforced nylon, 4 parts by mass of polyurethane fiber, 3 parts by mass of flame retardant, 1 part by mass of initiator, 3 parts by mass of inorganic filler, 4 parts by mass of plasticizer, 2 parts by mass of coupling agent, 1 part by mass of light stabilizer and 2 parts by mass of lubricant.
More specifically, in the present embodiment: the material is prepared into a core rod 11 by the following steps of placing epoxy resin, polyether-ether-ketone, glass fiber reinforced nylon 66, polyurethane fiber, a flame retardant, a plasticizer, a light stabilizer and a lubricant into a mixing device for stirring and mixing uniformly, adding an initiator, an inorganic filler and a coupling agent into the mixing device for mixing uniformly, and finally sending the mixture into a double-screw extruder for melt extrusion and granulation to obtain the core rod 11.
It is worth noting that the insulating material is used as the base resin by using both epoxy resin and polyether-ether-ketone, wherein the epoxy resin has good physical and chemical properties, good dielectric properties, small deformation shrinkage, good dimensional stability of products, high hardness, better flexibility, stability to alkali and most solvents, and meanwhile, the epoxy resin has larger mechanical strength, high crosslinking degree after curing, and is plastic with stable performance, good insulativity and high mechanical strength; the main chain structure of polyether-ether-ketone contains a high polymer formed by one ketone bond and two ether bond repeating units, belongs to a special high polymer material, has physical and chemical properties such as high temperature resistance, chemical corrosion resistance and the like, can be used as a high temperature resistant structural material and an electric insulating material, can be used for synergistic action, and can form a net structure after solidification, and has good stability, so that the prepared insulating bar material has excellent mechanical property, compact structure, good insulativity, and excellent tensile strength and mechanical property.
Furthermore, it is worth noting that the glass fiber reinforced nylon 66 and polyurethane fiber are added as reinforcing substances in the insulating material, and the glass fiber reinforced nylon 66 is a thermoplastic insulating material which has excellent mechanical property, heat resistance, cracking resistance and electrical insulation property, so that the comprehensive performance of an insulating rod product can be greatly improved, and various performance requirements of medium-voltage complete switch equipment can be met; the polyurethane fiber has outstanding high rebound resilience, excellent tensile strength, tear strength, weather resistance, strong ultraviolet irradiation resistance, chemical resistance, washing resistance and good dye affinity, glass fiber reinforced nylon 66 and polyurethane fiber are added into the insulating material at the same time, after the glass fiber reinforced nylon 66 and the polyurethane fiber are added, reinforcing effect and synergistic effect are exerted from different angles, and the glass fiber reinforced nylon 66 can strengthen the bonding strength of a composite material interface formed by polyether-ether-ketone and a resin mixture, reduce longitudinal or transverse cracks of the material caused by external force, so that the tensile property and mechanical property of the insulating rod are greatly improved.
Further, in the present embodiment: in the step S4, epoxy resin, curing agent and accelerator are mixed for 2-4 hours at 45-65 ℃ and 100-300 rpm/min, and vacuum defoamation is carried out for 2-4 hours after mixing.
More specifically, in the present embodiment: the mixed resin mixture is subjected to vacuum defoamation to prevent air gaps from being generated after solidification, so that the situation of fracture is avoided, the strength of the insulating rod is improved, the curing agent is prepared by mixing liquid methyl hexahydrophthalic anhydride, hexahydrophthalic anhydride and other materials by mass, and then a curing accelerator accounting for 0.1% -3% of the total mass of the impregnating resin is added into the impregnating resin, wherein the curing accelerator is benzyl dimethylamine or 2,4, 6-triphenol; the curing accelerator can accelerate the curing speed of the impregnating resin in the inner cavity, shorten the duration of the preparation process of the insulating rod and improve the production efficiency of the insulating rod.
Further, in the present embodiment: and the insulation rod is subjected to pressure resistance detection after the insulation rod is processed, unqualified products are removed, and the safety of the insulation rod when the insulation rod is put into use is ensured.
More specifically, in the present embodiment: the voltage withstand detection method comprises the steps of firstly placing an insulating rod to be detected on an alternating current voltage withstand detection platform, enabling a gap to exist between one end of the insulating rod and a pressurizing electrode of the alternating current voltage withstand detection platform, enabling the other end of the insulating rod to be connected with an ammeter of the alternating current voltage withstand detection platform, and then closing a voltage regulator power switch of the alternating current voltage withstand detection platform to conduct pressurizing test; in the process of slowly increasing the voltage, the shape and the color of an arc column part formed when arc discharge occurs in a gap are observed, and meanwhile, the change condition of a current value displayed by an ammeter is recorded; the insulation performance of the insulation rod is judged according to the shape and the color of the arc column part and the change condition of the current value, the judgment is related to the insulation capacity calibrated by the insulation rod, and the detection result is analyzed and judged by using the gap luminous intensity and the leakage current threshold value, so that the potential safety hazard is reduced, and the detection efficiency of the insulation rod is improved.
Further, in the present embodiment: and S7, after the insulating rod is taken out, polishing the outer surface of the insulating rod through a polishing device, and cutting the uneven part of the insulating rod through a cutting device to obtain a smooth and flat tubular insulating rod.
More specifically, in the present embodiment: under the combined action of the polishing device and the cutting device, the insulating rod after solidification is processed, and the comfort level of the insulating rod during use is improved.
Further, in the present embodiment: the protective coating 13 consists of, by mass, 25-35 parts of organic silicon resin, 5-10 parts of polysilicone, 5-8 parts of nano silicon, 30-45 parts of epoxy resin, 3-5 parts of a jewel flower extract, 8-10 parts of a dipstick extract, 2-3 parts of organic bentonite, 2-3 parts of glass flakes, 3-10 parts of silica sol, 15-20 parts of ethyl acetate, 1-5 parts of a processing aid and 2-3 parts of a film forming agent.
More specifically, in the present embodiment: the organic bentonite in the material formed by the protective coating 13 can be used as an anti-settling agent and a dispersing agent, and can also effectively improve the electromagnetic shielding performance of the coating, so that the safety coefficient of the insulating rod in use is improved, the glass flakes can effectively improve the rust and corrosion resistance of the insulating rod, the preparation process of the material formed by the protective coating 13 comprises the steps of firstly mixing organic silicon resin, polysilicone, nano silicon, epoxy resin and a jewel flower extract, adding the mixture into ethyl acetate at 65-72 ℃ for stirring, adding the Mesona extract, the organic bentonite and silica sol into the ethyl acetate, finally adding the glass flakes, the processing aid and the film forming agent, continuously stirring for reacting for 30 minutes at 2000 revolutions per minute, grinding to obtain slurry, coating the slurry on the surface of the insulating rod, and baking and curing to obtain a coating with adhesive force reaching a level, so that the electrical insulation property, the radiation resistance, the wear resistance and the ageing resistance of the insulating rod can be effectively improved.
Embodiment two:
referring to fig. 1 to 4, the present embodiment provides a process for preparing an insulating rod, which includes the following steps:
step S1: the method comprises the steps of (1) forming a core rod, preparing a die, adopting an insulating material to process and form the core rod 11, cleaning the inner cavity wall of the die and the surface of the core rod 11, drying after cleaning, and smearing a release agent;
step S2: soaking the fiber felt in the foaming resin to enable the foaming resin to be filled in the fiber felt and on two sides of the fiber felt, and then coating the soaked fiber felt on the surface of the core rod 11;
step S3: coating the fiber dry yarns on the outer side of a fiber mat according to a layering design, forming a fiber layer 12 by the fiber dry yarns and the fiber mat together, and then placing the core rod 11 into a die;
step S4: heating the die by adopting a mode of encircling the die by a heating tile, and carrying out vacuum dehumidification on the fiber layer 12 for 5 hours at 80 ℃; mixing epoxy resin, a curing agent and an accelerator, and then carrying out vacuum defoamation to obtain a resin mixture;
step S5: pouring resin in vacuum, pouring the resin mixture obtained in the step 4 into a mould, and dipping the mould into the fiber layer 12;
step S6: after the resin is fully soaked in the fiber material, regulating the temperature of a heating device to 150 ℃, and heating, curing and forming the resin for 10 hours;
step S7: after solidification, the core rod 11 is pulled out of the die after cooling, an insulating rod is obtained, and then the surface of the insulating rod is coated with the protective coating 13.
Further, in the present embodiment: the insulating material in the step S1 consists of 39 parts by mass of epoxy resin, 12 parts by mass of polyether-ether-ketone, 66,8 parts by mass of glass fiber reinforced nylon, 5 parts by mass of polyurethane fiber, 3 parts by mass of flame retardant, 2 parts by mass of initiator, 4 parts by mass of inorganic filler, 3 parts by mass of plasticizer, 2 parts by mass of coupling agent, 2 parts by mass of light stabilizer and 3 parts by mass of lubricant.
Embodiment III:
referring to fig. 1 to 4, the present embodiment provides a process for preparing an insulating rod, which includes the following steps:
step S1: the method comprises the steps of (1) forming a core rod, preparing a die, adopting an insulating material to process and form the core rod 11, cleaning the inner cavity wall of the die and the surface of the core rod 11, drying after cleaning, and smearing a release agent;
step S2: soaking the fiber felt in the foaming resin to enable the foaming resin to be filled in the fiber felt and on two sides of the fiber felt, and then coating the soaked fiber felt on the surface of the core rod 11;
step S3: coating the fiber dry yarns on the outer side of a fiber mat according to a layering design, forming a fiber layer 12 by the fiber dry yarns and the fiber mat together, and then placing the core rod 11 into a die;
step S4: heating the die by adopting a mode of encircling the die by a heating tile, and carrying out vacuum dehumidification on the fiber layer 12 for 3 hours at 90 ℃; mixing epoxy resin, a curing agent and an accelerator, and then vacuum defoaming to obtain a resin mixture.
Step S5: pouring resin in vacuum, pouring the resin mixture obtained in the step 4 into a mould, and dipping the mould into the fiber layer 12;
step S6: after the resin is completely soaked in the fiber material, regulating the temperature of a heating device to 140 ℃, and heating, curing and forming the resin for 15 hours;
step S7: after solidification, the core rod 11 is pulled out of the die after cooling, an insulating rod is obtained, and then the surface of the insulating rod is coated with the protective coating 13.
Further, in the present embodiment: the insulating material in the step S1 consists of 41 parts by mass of epoxy resin, 11 parts by mass of polyether-ether-ketone, 66,9 parts by mass of glass fiber reinforced nylon, 5 parts by mass of polyurethane fiber, 3 parts by mass of flame retardant, 3 parts by mass of initiator, 2 parts by mass of inorganic filler, 5 parts by mass of plasticizer, 2 parts by mass of coupling agent, 2 parts by mass of light stabilizer and 1 part by mass of lubricant.
Embodiment III:
referring to fig. 1 to 4, the present embodiment provides a process for preparing an insulating rod, which includes the following steps:
step S1: the method comprises the steps of (1) forming a core rod, preparing a die, adopting an insulating material to process and form the core rod 11, cleaning the inner cavity wall of the die and the surface of the core rod 11, drying after cleaning, and smearing a release agent;
step S2: soaking the fiber felt in the foaming resin to enable the foaming resin to be filled in the fiber felt and on two sides of the fiber felt, and then coating the soaked fiber felt on the surface of the core rod 11;
step S3: coating the fiber dry yarns on the outer side of a fiber mat according to a layering design, forming a fiber layer 12 by the fiber dry yarns and the fiber mat together, and then placing the core rod 11 into a die;
step S4: heating the die by adopting a mode of encircling the die by a heating tile, and carrying out vacuum dehumidification on the fiber layer 12 for 4 hours at 70 ℃; mixing epoxy resin, a curing agent and an accelerator, and then carrying out vacuum defoamation to obtain a resin mixture;
step S5: pouring resin in vacuum, pouring the resin mixture obtained in the step 4 into a mould, and dipping the mould into the fiber layer 12;
step S6: after the resin is fully soaked in the fiber material, regulating the temperature of a heating device to 170 ℃, and heating, curing and forming the resin for 13 hours;
step S7: after solidification, the core rod 11 is pulled out of the die after cooling, an insulating rod is obtained, and then the surface of the insulating rod is coated with the protective coating 13.
Further, in the present embodiment: the insulating material in the step S1 consists of 52 parts by mass of epoxy resin, 8 parts by mass of polyether-ether-ketone, 66,5 parts by mass of glass fiber reinforced nylon, 3 parts by mass of polyurethane fiber, 7 parts by mass of flame retardant, 1 part by mass of initiator, 2 parts by mass of inorganic filler, 3 parts by mass of plasticizer, 2 parts by mass of coupling agent, 2 parts by mass of light stabilizer and 1 part by mass of lubricant.
Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (8)
1. An insulating rod, characterized by comprising:
the insulation rod comprises an insulation rod body (1), wherein the insulation rod body (1) comprises a core rod (11), a fiber layer (12) is arranged on the surface of the core rod (11), the fiber layer (12) comprises a fiber felt and fiber dry yarns, a protective coating (13) is arranged on the surface of the fiber layer (12), and a handle part (2) and a working head (3) are respectively arranged at two ends of the insulation rod body (1).
2. The preparation process of the insulating rod is characterized by comprising the following steps of:
step S1: forming a core rod, preparing a die, adopting an insulating material to process and form the core rod (11), cleaning the inner cavity wall of the die and the surface of the core rod (11), and drying and smearing a release agent after cleaning;
step S2: soaking the fiber felt in foaming resin to enable the foaming resin to be filled in the fiber felt and on two sides of the fiber felt, and then coating the soaked fiber felt on the surface of the core rod (11);
step S3: cladding the fiber dry yarns on the outer side of the fiber mat according to a layering design, forming the fiber layer (12) together with the fiber mat, and then placing the core rod (11) into the die;
step S4: heating the die by adopting a mode of encircling the die by a heating tile, and carrying out vacuum dehumidification on the fiber layer (12) for 3-5 h at 60-90 ℃; mixing epoxy resin, a curing agent and an accelerator, and then carrying out vacuum defoamation to obtain a resin mixture;
step S5: pouring resin in vacuum, pouring the resin mixture obtained in the step 4 into the mould, and dipping the resin mixture into the fiber layer (12);
step S6: after the resin is fully soaked in the fiber material, regulating the temperature of a heating device to 140-180 ℃, and heating, solidifying and forming the resin for 10-15 hours;
step S7: and after solidification, cooling, pulling the core rod (11) out of the die to obtain an insulating rod, and then coating the surface of the insulating rod to form the protective coating (13).
3. The process for preparing an insulating rod according to claim 2, wherein: the insulating material in the step S1 consists of, by mass, 36-52 parts of epoxy resin, 8-14 parts of polyether-ether-ketone, 66,5-9 parts of glass fiber reinforced nylon, 2-4 parts of polyurethane fiber, 3-7 parts of flame retardant, 1-3 parts of initiator, 2-6 parts of inorganic filler, 3-5 parts of plasticizer, 2-4 parts of coupling agent, 1-3 parts of light stabilizer and 1-3 parts of lubricant.
4. The process for preparing an insulating rod according to claim 2, wherein: the epoxy resin, the curing agent and the accelerator in the step S4 are mixed for 2-4 hours at the temperature of 45-65 ℃ and the rotating speed of 100-300 rpm/min, and the vacuum defoamation is carried out for 2-4 hours after the mixing.
5. The process for preparing an insulating rod according to claim 2, wherein: the insulation rod is subjected to pressure resistance detection after processing, unqualified products are removed, and safety of the insulation rod in use is guaranteed.
6. The process for preparing an insulating rod according to claim 2, wherein: and after the insulating rod is taken out in the step S7, polishing the outer surface of the insulating rod through a polishing device, and cutting the uneven part of the insulating rod through a cutting device to obtain a smooth and flat tubular insulating rod.
7. The process for preparing an insulating rod according to claim 2, wherein: and the step 5 of resin vacuum infusion is to infuse the resin mixture obtained in the step 4 into the lower port of the mould under the pressure of 0.2-0.4 Mpa, impregnate the fiber fabric, and infuse the fiber fabric for 0.5-2 h under vacuum, wherein the total infusion amount is 500-600 g after each infusion of 18-100 g.
8. The process for preparing an insulating rod according to claim 2, wherein: the protective coating (13) consists of, by mass, 25-35 parts of organic silicon resin, 5-10 parts of polysilicone, 5-8 parts of nano silicon, 30-45 parts of epoxy resin, 3-5 parts of a jewel flower extract, 8-10 parts of a dipperstick extract, 2-3 parts of organic bentonite, 2-3 parts of glass flakes, 3-10 parts of silica sol, 15-20 parts of ethyl acetate, 1-5 parts of a processing aid and 2-3 parts of a film forming agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310128264.4A CN116453780A (en) | 2023-02-17 | 2023-02-17 | Insulating rod and preparation process thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310128264.4A CN116453780A (en) | 2023-02-17 | 2023-02-17 | Insulating rod and preparation process thereof |
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| CN116453780A true CN116453780A (en) | 2023-07-18 |
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| CN202310128264.4A Pending CN116453780A (en) | 2023-02-17 | 2023-02-17 | Insulating rod and preparation process thereof |
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| Country | Link |
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| CN (1) | CN116453780A (en) |
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2023
- 2023-02-17 CN CN202310128264.4A patent/CN116453780A/en active Pending
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