CN109243694B - long-life enameled wire and production process thereof - Google Patents
long-life enameled wire and production process thereof Download PDFInfo
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- CN109243694B CN109243694B CN201811053581.XA CN201811053581A CN109243694B CN 109243694 B CN109243694 B CN 109243694B CN 201811053581 A CN201811053581 A CN 201811053581A CN 109243694 B CN109243694 B CN 109243694B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/065—Insulating conductors with lacquers or enamels
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/16—Insulating conductors or cables by passing through or dipping in a liquid bath; by spraying
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0258—Disposition of insulation comprising one or more longitudinal lapped layers of insulation
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Abstract
the invention discloses a long-life enameled wire, which comprises a conductive copper core and an insulating paint layer, wherein a mixed protective layer is arranged between the conductive copper core and the insulating paint layer, a lubricating layer is arranged on the outer surface of the insulating paint layer, the insulating paint layer comprises modified fluorine-containing polyimide insulating paint coated on the surface of the mixed protective layer and polyester imide insulating paint coated outside the modified fluorine-containing polyimide insulating paint, the invention also discloses a long-life enameled wire production process, the production process sequentially comprises wire drawing cleaning, heat treatment, coating of the mixed protective layer, painting and post take-up treatment, the viscosity and the adhesiveness of the insulating paint are improved, the coating effect of the insulating paint is greatly improved, meanwhile, the hardness, the strength, the plasticity and the toughness of the conductive copper core are improved through the heat treatment, and even when the winding radian is large or the winding times are more, the crack phenomenon does not occur, the service life of the enameled wire is prolonged.
Description
Technical Field
The invention relates to the field of enameled wires, in particular to a long-life enameled wire and a production process thereof.
Background
The enameled wire is a main variety of winding wires and consists of a conductor and an insulating layer, and a bare wire is annealed and softened and then is subjected to painting and baking for multiple times. However, it is not easy to produce a product which meets both the standard requirements and the customer requirements, and it is influenced by the quality of raw materials, process parameters, production equipment, environment and other factors, so that the quality characteristics of various enameled wires are different, but the enameled wires have four properties of mechanical properties, chemical properties, electrical properties and thermal properties.
Polyimide is the wire enamel with the highest heat-resistant grade in the existing organic enameled wires, and the long-term use temperature of the wire enamel can reach more than 220 ℃. The paint was developed successfully in 1958 by the united states. The polyimide enameled wire has high heat resistance and good solvent resistance and freezing agent resistance. But its widespread use is hampered by its high cost, poor storage stability and toxicity. At present, the enameled wire is used in some special occasions, such as coal mine motors, cosmos space instruments and meters and the like
In order to improve the temperature resistance level and develop special-purpose enameled wires, a composite insulating layer is generally adopted. The composite coating enameled wire has the following advantages compared with a single coating enameled wire that (1) the special use requirements are met, such as a complex self-adhesive enameled wire for frameless forming, a refrigerant-resistant enameled wire for refrigerators and air-conditioning compressors and the like can be met through a composite coating structure; (2) the characteristics of the insulating layers are made good for the weakness by compounding the insulating layers, and the using performance is improved and enhanced so as to meet the using requirements, for example, the polyester/nylon composite coating enameled wire improves the thermal shock performance and the winding performance, is suitable for a thermal dipping process, and can be used for motor windings which are instantaneously overheated due to overload; (3) can reduce the cost of certain enameled wires, such as the polyesterimide and polyamideimide composite coating enameled wire which replaces the polyamideimide enameled wire with a single coating, and can greatly reduce the cost
However, the existing enameled wire and the production process thereof have the following defects:
(1) In the prior art, the enameled wire is usually made of fluorine-free polyimide insulating paint, the fluorine-free polyimide has poor solubility, so that the polyimide insulating paint has high viscosity, the polyimide insulating paint has high viscosity and can reduce the leveling performance of paint liquid in the production process of the enameled wire, so that the coating is eccentric, the conductive copper core 1 is easily oxidized at a thin position coated with the polyimide insulating paint to influence the adhesion of the paint film, the solvent in the paint film is not sufficiently volatilized at a thick position, the crosslinking degree is poor, the elasticity and the adhesion performance of the paint film are reduced, and the paint stripping phenomenon is easily caused to influence the continuity of the paint film to generate pinholes;
(2) enameled wire toughness among the prior art is not high, and when coiling radian is great or the number of times of coiling was great, the enameled wire surface cracked, can not carry out good electrical isolation, takes place electric breakdown easily, and the enameled wire makes adjacent enameled wire ring parallelly connected together because of electric breakdown in the use, has reduced the resistance of coiling enameled wire, and the enameled wire generates heat soon after the circular telegram, causes the damage of electrical apparatus easily.
Disclosure of Invention
In order to overcome the defects of the prior art scheme, the invention provides the enameled wire with the long service life and the production process thereof, the viscosity and the adhesiveness of the insulating paint are improved, the coating effect of the insulating paint is greatly improved, meanwhile, the hardness, the strength, the plasticity and the toughness of the conductive copper core are improved through heat treatment, the quality of the enameled wire is effectively ensured, and the problems in the background art can be effectively solved.
The technical scheme adopted by the invention for solving the technical problems is as follows:
the utility model provides a long-life enameled wire, includes conductive copper core and insulating varnish layer, be equipped with mixed inoxidizing coating between conductive copper core and the insulating varnish layer, insulating varnish layer surface is equipped with the lubricant film, insulating varnish layer is including the modified fluorine-containing polyimide insulated paint of coating on mixed inoxidizing coating surface and the cladding is at the outside polyester imide insulated paint of modified fluorine-containing polyimide insulated paint.
further, the mixed protection layer is uniformly coated on the conductive copper core and comprises glass fiber, nylon fiber and polyester fiber, and the number mixing ratio of the glass fiber, the nylon fiber and the polyester fiber is 2:5: 3.
Further, the lubricating layer comprises an ester lubricant which is uniformly coated on the surface of the insulating paint layer.
further, the modified fluorine-containing polyimide insulating paint comprises fluorine-containing alicyclic diamine, alicyclic dianhydride and a modified silane coupling agent.
Further, the invention also provides a production process of the long-life enameled wire, which comprises the following steps:
S100, continuously drawing and cleaning a raw material copper wire of the enameled wire;
s200, toughening and heat treating to improve the mechanical property of the conductive copper core;
s300, coating the mixed protective layer to strengthen the conductive copper core;
s400, coating insulating paint on the surface of the copper wire and drying;
and S500, performing later-stage wire rewinding treatment on the enameled wire.
further, in step S100, the continuous drawing and cleaning of the raw material copper wire of the enameled wire is specifically as follows: and continuously drawing the raw material copper wire of the enameled wire for at least two times, and cleaning the raw material copper wire of the enameled wire after the wire drawing operation is finished.
Further, in step S200, the step of performing heat treatment on the copper wire after wire drawing and cleaning includes:
S201, placing the conductive copper core into an oxygen-free constant-temperature oven to be slowly heated to a quenching temperature of 930-940 ℃;
s202, putting the heated conductive copper core into deionized water for rapid cooling, and carrying out secondary cleaning on the surface of the conductive copper core;
S203, putting the cooled conductive copper core into a tempering furnace to carry out a tempering process, wherein the tempering temperature is 250-300 ℃, and the tempering time is 5-10 minutes;
and S204, naturally cooling the conductive copper core after tempering in an oxygen-free environment.
Further, in step S400, the ratio of the modified fluorine-containing polyimide insulating paint to the polyester imide insulating paint is set to 7:3, and the modified fluorine-containing polyimide insulating paint and the polyester imide insulating paint are dried by using metering pump paint supply, multi-pass mold painting, hot air circulation and catalytic combustion technologies.
further, in step S500, the post-rewinding process of the enameled wire includes the following steps:
S501, uniformly coating an ester lubricant on the surface of the enameled wire coated with the insulating varnish;
S502, in the process of winding the enameled wire, carrying out online detection on the enameled wire through a high-voltage pinhole monitor and a particle detector;
S503, winding and packaging the qualified enameled wire.
Further, in step S503, during the winding of the enamel wire, at most three winding wheels are used for winding the enamel wire.
Compared with the prior art, the invention has the beneficial effects that:
(1) according to the invention, the polyimide is modified, and the alicyclic chain segment and fluorine atoms are introduced, so that the solubility of the polyimide is enhanced, the viscosity of the polyimide can be reduced by adding a solvent, the leveling property of the polyimide insulating paint is improved, the polyimide insulating paint can be uniformly attached to a conductive copper core in the coating process of the polyimide insulating paint, the phenomenon of coating eccentricity of an insulating paint layer is avoided, and the production quality of an enameled wire is greatly improved;
(2) The invention carries out quenching and tempering heat treatment on the conductive copper core, the conductive copper core obtains tissues such as bainite through quenching, and the like, and the tempering is carried out after the quenching is finished, thereby eliminating the residual stress generated during the quenching of the conductive copper core, preventing deformation and cracking, simultaneously adjusting the hardness, strength, plasticity and toughness of the conductive copper core, avoiding the cracking phenomenon even if the winding radian is larger or the winding times are more, and effectively ensuring the quality of the enameled wire.
drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a flow chart of the present invention.
Reference numbers in the figures:
1-a conductive copper core; 2-insulating paint layer; 3-mixing a protective layer; 4-a lubricating layer; 5-modified fluorine-containing polyimide insulating paint; 6-polyester imide insulating paint.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, the invention provides a long-life enameled wire, which comprises a conductive copper core 1 and an insulating paint layer 2, wherein a mixed protective layer 3 is arranged between the conductive copper core 1 and the insulating paint layer 2, a lubricating layer 4 is arranged on the outer surface of the insulating paint layer 2, and the insulating paint layer 2 comprises a modified fluorine-containing polyimide insulating paint 5 coated on the outer surface of the mixed protective layer 3 and a polyester imide insulating paint 6 coated outside the modified fluorine-containing polyimide insulating paint 5.
in this embodiment, the enameled wire is by conductive copper core 1, mix inoxidizing coating 3, insulating varnish layer 2 and 4 four-layer structures of lubricant film constitute, in the four-layer structure of enameled wire, conductive copper core 1 is used for the transmission of electric current, mix inoxidizing coating 3 and be used for promoting whole mechanical strength of enameled wire and toughness, can protect the enameled wire effectively, insulating varnish layer 2 is used for electrical isolation, lubricant film 4 is used for promoting the smoothness of enameled wire surface, reduce the coefficient of friction of enameled wire surface, the enameled wire has been prevented to produce the damage at high-speed coiling in-process.
in the embodiment, the conductive copper core 1 is formed by drawing a low-oxygen copper rod, the low-oxygen copper rod adopts a continuous casting and rolling production process, a casting tissue is broken through hot rolling, fine impurity particles can be thinned to a micron-sized range, and the softness, the resilience angle and the winding performance of the conductive copper rod are more excellent.
Meanwhile, the enameled wire adopting the fluorine-containing polyimide insulating paint and the polyesterimide edger composite coating has the advantages of considering processability, material cost and comprehensive performance, particularly heat resistance and flexibility, improving the production benefit of the enameled wire, and meeting the requirements of the motor industry and the electrical appliance industry on the service performance of the enameled wire, wherein the polyester imide insulating paint endows the paint film with good adhesiveness and flexibility, the modified fluorine-containing polyimide insulating paint improves the heat resistance of the enameled wire, and the integral quality of the enameled wire is improved.
The mixed protective layer 3 is uniformly coated on the lubricating layer 1, and the mixed protective layer 3 comprises glass fiber, nylon fiber and polyester fiber, and the number mixing ratio of the glass fiber, the nylon fiber and the polyester fiber is 2:5: 3.
In this embodiment, mix inoxidizing coating 3 cladding on electrically conductive copper core 1 to bond on electrically conductive copper core 1 through insulating varnish layer 2, mix inoxidizing coating 3's setting, not only promoted the mechanical strength and the toughness of enameled wire, can also act as the insulating layer simultaneously, promoted the electrical breakdown resistance performance of enameled wire greatly.
The lubricating layer 4 comprises an ester lubricant which is uniformly coated on the surface of the insulating paint layer 2.
in the embodiment, the arrangement of the lubricating layer can effectively improve the winding performance of the enameled wire, reduce the friction coefficient and avoid the damage of the enameled wire in the high-speed winding process.
The modified fluorine-containing polyimide insulating paint 5 comprises fluorine-containing alicyclic diamine, alicyclic dianhydride containing resin and a modified silane coupling agent.
in the embodiment, the modified fluorine-containing polyimide insulating varnish 5 can reduce or inhibit charge transfer in molecules and among molecules by introducing an alicyclic structure, so that the solubility, optical permeability, dielectric property and the like of the modified fluorine-containing polyimide insulating varnish in an organic solvent are improved, and the modified fluorine-containing polyimide insulating varnish 5 also introduces fluorine atoms, so that the modified fluorine-containing polyimide insulating varnish has the advantages of obviously improved solubility compared with fluorine-free polyimide, lower hygroscopicity, high permeability and heat resistance.
In the embodiment, the synthesis process of the modified fluorine-containing polyimide insulating varnish 5 is as follows:
(1) cyclopentanone and benzyl are taken as raw materials to synthesize a second containing a cyclopentyl yard structure, and the second and chloronitrotrifluors are subjected to nucleophilic substitution reaction and hydrazine hydrate reduction reaction to synthesize a novel fluorine-containing alicyclic diamine monomer;
(2) diphenol and chlorinated trimellitic anhydride are subjected to nucleophilic substitution reaction to synthesize a novel monomer containing alicyclic dianhydride;
(3) Mixing one molar part of organic diamine and two molar parts of organic dianhydride, dissolving in the mixture, adding two molar parts of organic dianhydride, stirring at room temperature overnight to obtain a novel interface compatilizer solution, namely a modified silane coupling agent;
(4) The modified fluorine-containing polyimide insulating paint is prepared by carrying out copolymerization reaction on a fluorine-containing alicyclic diamine monomer, an alicyclic dianhydride monomer and a modified silane coupling agent which are prepared according to the mass ratio.
In the prior art, the fluorine-free polyimide has poor solubility, so that the polyimide insulating paint has high viscosity, the polyimide insulating paint has high viscosity in the production process of enameled wires, the leveling performance of paint liquid is reduced, the coating is eccentric, the conductive copper core 1 is easily oxidized at the thin part coated by the polyimide insulating paint, the adhesion of a paint film is influenced, the solvent in the paint film is not sufficiently volatilized at the thick part, the crosslinking degree is poor, the elasticity and the adhesion of the paint film are reduced, and the paint stripping phenomenon is easily caused to influence the continuity of the paint film and generate pinholes.
Compared with the prior art, the preparation method disclosed by the invention has the advantages that the polyimide is modified, the solubility of the polyimide is enhanced by introducing the alicyclic chain segment and the fluorine atom, the viscosity of the polyimide can be reduced by adding the solvent, the leveling property of the polyimide insulating paint is improved, the polyimide insulating paint can be uniformly attached to the conductive copper core 1 in the coating process of the polyimide insulating paint, the phenomenon of coating eccentricity of the insulating paint layer 4 is avoided, meanwhile, the adhesiveness among interfaces is effectively improved by the modified silane coupling agent, and the production quality of the enameled wire is greatly improved.
The invention also provides a production process of the long-life enameled wire, which comprises the following steps:
And S100, continuously drawing and cleaning the raw material copper wire of the enameled wire.
In the step, the steps of continuously drawing and cleaning the raw material copper wire of the enameled wire are as follows: and continuously drawing the raw material copper wire of the enameled wire for at least two times, and cleaning the raw material copper wire of the enameled wire after the wire drawing operation is finished.
in the embodiment, at least twice continuous wire drawing is carried out on the raw material copper wire of the enameled wire, the diameter of the copper wire is gradually reduced until the copper wire with the finished wire drawing reaches the diameter size required by a product, the damage to the copper wire caused by single wire drawing is avoided, the copper wire with the finished wire drawing is cleaned by using non-ionic water, dust and oil stains on the surface of the copper wire are removed, and the firmness of subsequent insulating paint adhesion is facilitated.
And S200, toughening and heat treating to improve the mechanical property of the conductive copper core.
In the step, the toughness of the conductive copper core is improved through quenching and tempering processes, in the heat treatment process of the conductive copper core 1, the conductive copper core 1 is quenched to obtain bainite and other structures, tempering is performed after quenching is completed, residual stress generated during quenching of the conductive copper core 1 is eliminated, deformation and cracking are prevented, meanwhile, the hardness, strength, plasticity and toughness of the conductive copper core can be adjusted, and the use performance requirements are met.
The quenching is to convert the super-cooled austenite into martensite or bainite to obtain martensite or bainite structure, and then to improve the rigidity, hardness, wear resistance, fatigue strength, toughness and the like of the steel by tempering at different temperatures, thereby meeting different use requirements of various mechanical parts and tools.
based on the above, in step S200, the specific steps of the toughening heat treatment are:
s201, placing the conductive copper core into an oxygen-free constant-temperature oven to be slowly heated to a quenching temperature of 930-940 ℃;
s202, putting the heated conductive copper core into deionized water for rapid cooling, and carrying out secondary cleaning on the surface of the conductive copper core;
S203, putting the cooled conductive copper core into a tempering furnace to carry out a tempering process, wherein the tempering temperature is 250-300 ℃, and the tempering time is 5-10 minutes;
And S204, naturally cooling the conductive copper core after tempering in an oxygen-free environment.
in this embodiment, the specific process of the heat treatment of the conductive copper core 1 is as follows:
(1) Drawing the conductive copper core 1 subjected to wire drawing and cleaning into an oxygen-free constant-temperature oven, slowly heating the conductive copper core 1 to a quenching temperature of 930-940 ℃, and rapidly cooling the conductive copper core 1 by using deionized water after the quenching temperature is reached;
(2) Drawing the quenched conductive copper core into a tempering furnace for tempering, wherein the tempering temperature is 250-300 ℃, and the tempering time is 5-10 minutes;
(3) and (4) feeding the tempered conductive copper core into a cooling cavity filled with nitrogen for natural cooling, and coating the mixed protective layer after cooling.
among the prior art, because enameled wire toughness is not high, when the coiling radian is great or the number of times of coiling is great, the enameled wire surface takes place the crackle, can not carry out good electrical isolation, takes place electric breakdown easily, and the enameled wire makes adjacent enameled wire ring parallelly connected together because of electric breakdown in the use, has reduced the resistance of coiling enameled wire, and the enameled wire generates heat soon after the circular telegram, causes the damage of electrical apparatus easily.
Compared with the prior art, the invention carries out quenching and tempering heat treatment on the conductive copper core 1, the conductive copper core 1 obtains bainite and other tissues through quenching, and tempering is carried out after quenching is finished, so that residual stress generated during quenching of the conductive copper core 1 is eliminated, deformation and cracking are prevented, meanwhile, the hardness, strength, plasticity and toughness of the conductive copper core can be adjusted, even if the winding radian is larger or the winding times are more, the cracking phenomenon can not occur, and the quality of the enameled wire is effectively ensured.
S300, coating the mixed protective layer to strengthen the conductive copper core.
In the step, the coating of the mixed protective layer comprises cutting of the reinforcing grooves and uniform coating of the mixed protective layer, the plurality of reinforcing grooves are uniformly cut on the conductive copper core, then the mixed protective layer is uniformly coated on the surfaces of the reinforcing grooves and the conductive copper core, and the mixed protective layer and the conductive copper core are tightly adhered together after insulating paint is coated. Meanwhile, the glass fiber, the polyester fiber and the nylon fiber contained in the mixed protective layer have good toughness, mechanical strength and insulating property, and when the mixed protective layer is applied to an enameled wire, the working performance and the mechanical performance of the enameled wire are greatly improved.
in the prior art, the enameled wire is bent when the bending radian is large and the bending times are large, the enameled wire can crack, the service life of the enameled wire is shortened, and meanwhile, the electrical isolation performance of the enameled wire is greatly reduced. Another problem is also caused in the production process of the enameled wire, when the insulating varnish is coated, the insulating varnish is eccentric, so that the thickness of the insulating varnish on the surface of the enameled wire is uneven, and the electrical isolation performance of the enameled wire is influenced.
compare with prior art, the setting of mixing the inoxidizing coating has two outstanding advantages:
(1) the glass fiber, the nylon fiber and the polyester fiber contained in the mixed protective layer have better toughness and mechanical strength, after the mixed protective layer is coated on the conductive copper core through the insulating paint, the mixed protective layer and the conductive copper core are bent synchronously, and the good mechanical performance of the mixed protective layer is applied to the conductive copper core, so that the toughness and the mechanical strength of the conductive copper core are improved, the enameled wire is prevented from cracking, and the service life of the enameled wire is greatly prolonged;
(2) even cladding of mixed inoxidizing coating is on reinforcing groove and electrically conductive copper core surface, and the effect of insulating layer has been played to mixed inoxidizing coating, even under the inhomogeneous condition of insulating varnish thickness coating, the setting of mixed inoxidizing coating has also promoted the lower limit of the electrical isolation performance of enameled wire, has guaranteed the safety and the stability of enameled wire work.
S400, coating insulating paint on the surface of the copper wire and drying.
in the step, multiple coating is adopted when the conductive copper core 1 is coated with the insulating paint, and the insulating paint is placed to be coated to an excessive thickness, so that the solvent in the insulating paint cannot be volatilized in time, and the production quality of the enameled wire is influenced. Meanwhile, the ratio of the modified fluorine-containing polyimide insulating paint to the polyester imide insulating paint is set to be 7:3, and the modified fluorine-containing polyimide insulating paint and the polyester imide insulating paint are dried by using metering pump paint supply, multi-mold painting, hot air circulation and catalytic combustion technologies.
In the embodiment, the insulating paint layer on the enameled wire adopts the composite coating, which takes into account processability, material cost and comprehensive performance, especially heat resistance and flexibility, can improve the production benefit of the enameled wire, and simultaneously meets the requirements of the motor and electrical appliance industries on the service performance of the enameled wire.
in this embodiment, the application measuring pump supplies the coating volume that lacquer can the close control insulated paint, during the painting of multichannel mould, single painting thickness is less, the volatilization of solvent in the insulated paint has been accelerated, the emergence of the bubble phenomenon that the insulated paint thickness is too big and lead to has been avoided, adopt heated air circulation's mode to dry behind the coating insulated paint, insulated paint's stoving speed has not only been accelerated, energy resource consumption has still been practiced thrift simultaneously, at the in-process of carrying out the insulated paint stoving, still can adopt the mode of catalytic combustion solvent to increase the required heat when drying, toxic solvent's harm to the human body has not only been reduced, the energy has still been practiced thrift simultaneously.
Catalytic combustion is a purification method in which combustible substances in exhaust gas are oxidatively decomposed at a relatively low temperature by using a catalyst. Therefore, catalytic combustion is also called catalytic chemical conversion. As the catalyst accelerates the oxidative decomposition process, most of hydrocarbons can be completely oxidized by the catalyst at the temperature of 300-450 ℃.
in the chemical reaction process, the method for reducing the combustion temperature by using the catalyst and accelerating the complete oxidation of the toxic and harmful gases is called catalytic combustion method, because the carrier of the catalyst is made of porous materials, the carrier has larger specific surface area and proper pore diameter, and when the organic gases are heated to 300 ~ 450 DEG Cwhen the catalyst layer is passed through, oxygen and organic gas are adsorbed on the catalyst on the surface layer of porous material, so that the contact and collision probability between oxygen and organic gas is increased, the activity is improved, and the organic gas and oxygen produce violent chemical reaction to produceandAnd simultaneously generates heat, thereby changing the organic gas into nontoxic and harmless gas.
and S500, performing later-stage wire rewinding treatment on the enameled wire.
in this step, the later-stage wire-rewinding treatment of the enameled wire comprises the following steps:
S501, uniformly coating an ester lubricant on the surface of the enameled wire coated with the insulating varnish;
s502, in the process of winding the enameled wire, carrying out online detection on the enameled wire through a high-voltage pinhole monitor and a particle detector;
S503, winding and packaging the qualified enameled wire.
In the embodiment, the enameled wire enters a later-stage detection and packaging process after the insulating paint is coated, and in the later-stage detection and packaging process of the enameled wire, the surface of the enameled wire is coated with the ester lubricant firstly, so that the winding performance of the enameled wire can be effectively improved, the friction coefficient is reduced, and the enameled wire is prevented from being damaged in the high-speed winding process.
And then carrying out online detection on the continuity of the enameled wire paint film and particles on the enameled wire, winding and packaging the enameled wire qualified through inspection, and removing the unqualified enameled wire.
The high-voltage pinhole detector is used for detecting the continuity of a paint film of an enameled wire on line, and is provided with an alarm in the production process, so that the detection curve is very stable, and the fluctuation range is very small; the particle detector is used for detecting the surface of the enameled wire so that the enameled wire can be timely found and processed when particles exist, and in the actual manufacturing process, the device is also provided with an alarm function, so that products qualified in process control can smoothly enter the next procedure.
in step S503, during the winding of the enamel wire, at most three winding wheels are used to wind the enamel wire.
In the embodiment, the number of the winding wheels is reduced as much as possible, so that the abrasion of the enameled wire caused by the friction between the enameled wire and the winding wheels in the winding process is reduced, the reduction of the electrical isolation performance caused by the different thicknesses of the insulated paint on the surface of the enameled wire is avoided, and the use performance of the enameled wire is effectively improved.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. a long-life enameled wire comprises a conductive copper core (1) and an insulating paint layer (2), and is characterized in that: the modified fluorine-containing polyimide insulating paint is characterized in that a mixed protective layer (3) is arranged between the conductive copper core (1) and the insulating paint layer (2), a plurality of reinforcing grooves are uniformly cut in the conductive copper core (1), the mixed protective layer (3) is tightly attached to the conductive copper core (1) through the reinforcing grooves, a lubricating layer (4) is arranged on the outer surface of the insulating paint layer (2), the insulating paint layer (2) comprises modified fluorine-containing polyimide insulating paint (5) coated on the outer surface of the mixed protective layer (3) and polyester imide insulating paint (6) coated outside the modified fluorine-containing polyimide insulating paint (5), and the modified fluorine-containing polyimide insulating paint (5) comprises fluorine-containing alicyclic diamine, aliphatic cyclic dianhydride and a modified silane coupling agent;
The mixed protection layer (3) is uniformly coated on the conductive copper core (1), and the mixed protection layer (3) comprises glass fiber, nylon fiber and polyester fiber, and the mixing ratio of the glass fiber, the nylon fiber and the polyester fiber is 2:5: 3.
2. the long life enameled wire of claim 1, wherein: the lubricating layer (4) comprises an ester lubricant which is uniformly coated on the surface of the insulating paint layer (2).
3. the production process of the long-life enameled wire is characterized by comprising the following steps of:
S100, continuously drawing and cleaning a raw material copper wire of the enameled wire;
S200, toughening and heat treating to improve the mechanical property of the conductive copper core;
S300, coating the mixed protective layer to strengthen the conductive copper core, wherein the mixed protective layer is coated by cutting the reinforced groove and uniformly coating the mixed protective layer;
S400, coating insulating paint on the surface of the copper wire and drying;
And S500, performing later-stage wire rewinding treatment on the enameled wire.
4. the long-life enameled wire production process according to claim 3, wherein in step S100, the continuous drawing and cleaning of the raw material copper wire of the enameled wire is specifically as follows: continuously drawing the raw material copper wire of the enameled wire at least twice, and cleaning a conductive copper core formed by drawing by using deionized water.
5. the production process of the long-life enameled wire according to claim 3, wherein in step S200, the specific steps of toughening and heat treating to improve the mechanical properties of the conductive copper core include:
S201, placing the conductive copper core into an oxygen-free constant-temperature oven to be slowly heated to a quenching temperature of 930-940 ℃;
S202, putting the heated conductive copper core into deionized water for rapid cooling, and carrying out secondary cleaning on the surface of the conductive copper core;
s203, putting the cooled conductive copper core into a tempering furnace to carry out a tempering process, wherein the tempering temperature is 250-300 ℃, and the tempering time is 5-10 minutes;
And S204, naturally cooling the conductive copper core after tempering in an oxygen-free environment.
6. The production process of the long-life enameled wire according to claim 3, characterized in that: in step S400, the ratio of the modified fluorine-containing polyimide insulating paint to the polyester imide insulating paint is set to be 7:3, and the modified fluorine-containing polyimide insulating paint and the polyester imide insulating paint are dried by using metering pump paint supply, multi-channel mold paint coating, hot air circulation and catalytic combustion technologies.
7. The long-life enameled wire production process of claim 3, wherein in step S500, the wire-rewinding process comprises the following steps:
s501, uniformly coating an ester lubricant on the surface of the enameled wire coated with the insulating varnish;
S502, in the process of winding the enameled wire, carrying out online detection on the enameled wire through a high-voltage pinhole monitor and a particle detector;
S503, winding and packaging the qualified enameled wire.
8. The production process of the long-life enameled wire according to claim 3, characterized in that: in step S503, during the winding of the enamel wire, at most three winding wheels are used to wind the enamel wire.
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| CN111029013B (en) * | 2019-10-17 | 2021-08-03 | 东莞宇隆电工材料有限公司 | Heat-cycle-resistant enameled wire and production process thereof |
| CN115926615A (en) * | 2022-11-24 | 2023-04-07 | 江苏四达特材科技有限公司 | High-wear-resistance polyimide wire enamel and preparation method thereof |
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| CN206003515U (en) * | 2016-09-22 | 2017-03-08 | 江苏盛华电气有限公司 | Enamel-covered wire |
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| CN100561609C (en) * | 2007-06-29 | 2009-11-18 | 江苏五洲电磁线有限公司 | The manufacture method of high adhesive self-pasting dual-glass silk-covered film agglomerated copper flat line |
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| CN106537521A (en) * | 2014-05-20 | 2017-03-22 | 施韦林&哈塞电线有限公司 | Enameled wire, coil member, and method for producing an enameled wire |
| CN106024165A (en) * | 2016-07-29 | 2016-10-12 | 先登高科电气有限公司 | High-temperature-resistant varnished wire |
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Denomination of invention: A long-life enamelled wire and its production process Effective date of registration: 20230210 Granted publication date: 20191213 Pledgee: Agricultural Bank of China Limited Lishui Development Zone Sub branch Pledgor: ZHEJIANG AOLIN ELECTRICAL EQUIPMENT Co.,Ltd. Registration number: Y2023330000354 |
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