CN103839612A - Insulation wire and making method thereof - Google Patents
Insulation wire and making method thereof Download PDFInfo
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- CN103839612A CN103839612A CN201310488002.5A CN201310488002A CN103839612A CN 103839612 A CN103839612 A CN 103839612A CN 201310488002 A CN201310488002 A CN 201310488002A CN 103839612 A CN103839612 A CN 103839612A
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Abstract
The invention provides an insulation wire and a making method thereof; in the insulation wire, an insulation coat has high contiguity for a conductor, thereby preventing coat floating and broken when a coil is made; the insulation wire is provided with the conductor and the insulation coat formed on a periphery of the conductor; the insulation coat is formed by resin composition containing polyphenylene sulfide or aromatic PEK as main content, and is formed under a state in which the conductor is pre-heated at a temperature above a fusion point of the resin composite.
Description
Technical field
The present invention relates to insulated electric conductor and manufacture method thereof, the insulated electric conductor particularly using and manufacture method thereof in the coil of electric rotating machine and/or transformer etc.
Background technology
In the motor such as electric rotating machine and/or transformer, possesses coil.In coil, use enamel paint coating insulated electric conductor (insulated electric conductor), formed coil by insulated electric conductor is wound in to core.Insulated electric conductor is made following structure: possess and have the insulation-coated of individual layer or multilayer in the periphery for example, with the conductor that meets the purposes of coil, the section shape of shape (circular shape, slightly rectangular-shaped).By the following method insulation-coated and form: the coatings that resin dissolves is obtained in organic solvent to be coated on conductor and the method for sintering, the resin combination making is in advance extruded on conductor and the method for coating etc.
In recent years, people have proposed requirement to the miniaturization of motor, and the coil in motor tends to miniaturization.In the situation that coil is carried out to miniaturization, with high tension force, insulated electric conductor is wound on the core of path to high-density, thereby the fill-in ratio (Zhan Plot of raising insulated electric conductor leads).For example, possess the insulated electric conductor of conductor (being also called below strap) with slightly rectangular-shaped section in use, by by the insulated electric conductor having stretched along edge (edgewise) bending core that is wound in path, can improve the fill-in ratio of insulated electric conductor and coil is carried out to miniaturization.In this wise, in the situation that coil is carried out to miniaturization, insulated electric conductor is applied to harsh machining stress, thus require its insulation-coated have can tolerate the such high mechanical property of harsh machining stress.
In addition, people have proposed requirement to the high output of motor, and the coil in electronic equipments has the tendency that drives and carry out Driven by inverter with high voltage., in the insulated electric conductor of coil, have and suffer high-tension tendency because of high voltage drive and inverter surge overlapping.When in insulated electric conductor, voltage uprises, the incidence of partial discharge improves, thereby requires the insulation-coated high partial discharge inception voltage that has.
As tackling insulation-coated in these requirements, known have formed by polyphenylene sulfide (PPS resin), aromatic polyether ketone etc. insulation-coated.Known, these resins show high partial discharge inception voltage, show excellent mechanical property simultaneously.But the adhesion of the insulation-coated and conductor being formed by these resins is low, thereby be formed at (for example, with reference to patent documentation 1 and patent documentation 2) on conductor across the resin bed being formed by other resin.
In patent documentation 1, propose a kind of surge of resistance to inverter insulated wire, wherein, on conductor, formed in turn the insulation-coated of the enamel paint sinter layer of at least 1 layer and at least 1 layer of being formed by PPS resin etc.Can provide a kind of insulated wire according to patent documentation 1, wherein, by form at conductor and by PPS resin insulation-coated between insert enamel paint sinter layer, thereby can not reduce conductor and insulation-coated adhesive strength, there is high partial discharge inception voltage (900Vp left and right).
In addition, a kind of multi-layer insulated electrical wire has been proposed in patent documentation 2, its have conductor and by 2 layers of conductor coating above insulation-coated, and 2 layers of above except innermost layer 1 layer among insulation-coated are formed by PPS resin insulation-coated.According to patent documentation 2, can provide the multi-layer insulated electrical wire of thermal endurance and chemical-resistant excellence.
In this wise, on conductor, form and comprise PPS resin etc. insulation-coated, in order to ensure the insulation-coated adhesion to conductor, conductor and insulation-coated between wall (enamel paint sinter layer etc.) be set and made sandwich construction.
Prior art document
Patent documentation
Patent documentation 1: No. 4177295 communique of Japanese Patent
Patent documentation 2: Japan is public table 2005-106898 communique again
Summary of the invention
The problem that invention will solve
But the insulated electric conductor shown in patent documentation 1 and 2 is sandwich construction and complex structure, thereby easily change is numerous and diverse to have manufacturing process, and manufacturing cost easily increases such problem.
In this, also can insulation-coatedly directly be formed at conductor and manufacture insulated electric conductor what formed by PPS resin etc., but have the insulation-coated tendency low to the adhesion of conductor in the insulated electric conductor obtaining.When the insulation-coated adhesion to conductor is low, in the time that insulated electric conductor is processed as to coil, have coating float off, crack on insulation-coated surface etc. break may.Particularly, having used in the insulated electric conductor of strap, owing to processing along curved edge in the time being processed as coil, thereby easily there is coating and float off, break.
The present invention completes in view of such problem, and its object is to provide a kind of insulated electric conductor and manufacture method thereof, and in this insulated electric conductor, the insulation-coated adhesion to conductor is high, suppresses coating and float off, break in the time being processed as coil.
For the scheme of dealing with problems
The 1st execution mode of the present invention provides a kind of insulated electric conductor, it possesses conductor and periphery insulation-coated that is formed at aforementioned conductor, aforementioned dielectric coating is to form as the resin combination of main component by comprising polyphenylene sulfide or aromatic polyether ketone, and aforementioned dielectric coating is to have carried out forming under pre-heated state more than the fusing point in aforementioned resin by aforementioned conductor.
The 2nd execution mode of the present invention provides the insulated electric conductor of the 1st execution mode, and wherein, aforementioned dielectric coating is more than the fusing point in aforementioned resin by aforementioned conductor, to foam to have carried out forming under pre-heated state below initial temperature.
The 3rd execution mode of the present invention provides a kind of manufacture method of insulated electric conductor, it is the manufacture method that possesses conductor and be formed at the insulation-coated insulated electric conductor of the periphery of aforementioned conductor, described insulation-coated be to form as the resin combination of main component by comprising polyphenylene sulfide or aromatic polyether ketone, the method possesses following operation: the heating process more than the fusing point of aforementioned resin, aforementioned conductor being heated, and aforementioned resin is extruded and is coated on the periphery of warmed-up aforementioned conductor and forms insulation-coated insulation-coated operation.
The 4th execution mode of the present invention provides the manufacture method of the insulated electric conductor of the 3rd execution mode, and wherein, aforementioned heating process is to heat aforementioned conductor heating by energising.
The 5th execution mode of the present invention provides the manufacture method of the insulated electric conductor of the 3rd execution mode or the 4th execution mode, and wherein, aforementioned heating process is by aforementioned conductor heating in non-active gas atmosphere.
The effect of invention
The present invention can obtain a kind of insulated electric conductor, and in this insulated electric conductor, the insulation-coated adhesion to conductor is high, suppresses coating and float off, break in the time being processed as coil.
Accompanying drawing explanation
Figure 1 shows that the skeleton diagram of the structure of the insulated electric conductor of an embodiment of the invention.
Figure 2 shows that the cutaway view of the insulated electric conductor of an embodiment of the invention.
Figure 3 shows that the cutaway view of insulated electric conductor in the past.
Figure 4 shows that the skeleton diagram of an example of the manufacturing installation using in the manufacture method of insulated electric conductor of an embodiment of the invention.
Description of reference numerals
1 insulated electric conductor, 10 conductors (strap), 11 insulation-coated, 20 send machine, 30 heaters, 40 insulating tubes, 50 extruders, 60 tanks, 70 coiling machines
Embodiment
As described above, be insulation-coatedly directly formed at conductor and manufacture in the situation of insulated electric conductor what formed by polyphenylene sulfide (PPS resin) etc., in obtained insulated electric conductor, the insulation-coated adhesion to conductor becomes insufficient.When such insulated electric conductor is processed as to coil, there is coating and float off, break.Particularly, having used in the insulated electric conductor of conductor (being also called below strap) with slightly rectangular-shaped section, owing to being processed as coil along curved edge, thereby easily there is coating and float off, break.
As the method for improving the insulation-coated adhesion to conductor, can consider the method after formation is insulation-coated, insulated electric conductor being reheated.According to the method, by carrying out melting again and guaranteed to be cured on the basis contacting of resin and conductor insulation-coated, thereby can improve the insulation-coated adhesion to conductor.But, have in the method by melting again and make insulation-coated bight (corner) attenuation, damage insulation-coated inhomogeneity may.
Therefore, inventor etc. is to insulation-coatedly conducting in-depth research the low reason of the adhesion of conductor of being formed by PPS resin etc.Then found, the reason that adhesion is low is to form the temperature difference of the resin of conductor when insulation-coated and melting on conductor.Particularly, on conductor, form insulation-coated in the situation that, will utilize heating and melting the resin extruded periphery in conductor and form, but utilizing heating melting high-temperature resin and the conductor of normal temperature between have temperature difference.Due to this temperature difference, thereby the resin of extruding is cooling and start to solidify by conductor with moment of conductor contact, is difficult for being cured under the state connecting airtight with conductor.Its result, makes the adhesion of the insulation-coated and conductor that resin is solidified to form low.
The inventor etc. are conceived to the temperature difference of resin and conductor, to such an extent as to it is insulation-coated in forming according to the mode that this temperature difference is eliminated to consider, thereby can improve the insulation-coated adhesion to conductor.That is, found to be coated on warmed-up conductor in advance by resin combination is extruded, form insulation-coated, thereby can suppress to result from the reduction of the insulation-coated adhesion to conductor of the temperature difference of resin and conductor.The present invention is based on these opinions forms.
An embodiment of the invention
Below, with reference to accompanying drawing, the insulated electric conductor of an embodiment of the invention is described.Figure 1 shows that the skeleton diagram of the structure of the insulated electric conductor of an embodiment of the invention, Figure 2 shows that the cutaway view of the insulated electric conductor of an embodiment of the invention.
(1) insulated electric conductor
The insulated electric conductor 1 of present embodiment possesses strap 10, be formed at strap 10 periphery insulation-coated 11, and insulation-coated 11 is by forming take polyphenylene sulfide (PPS resin) or aromatic polyether ketone as the resin combination of main component, in resin combination, for example comprises polyphenylene sulfide (PPS resin) or aromatic polyether ketone with the content below above 100 mass parts of 80 mass parts.Insulation-coated 11 is more than the fusing point at resin combination by strap 10, to have carried out forming under pre-heated state.
Insulation-coated 11 are formed at the periphery of strap 10, are formed by resin combination, and in this resin combination, containing PPS resin or aromatic polyether ketone is main component, and content is for below above 100 mass parts of for example 80 mass parts.Insulation-coated 11 by utilizing heating melting resin combination be expressed on strap 10 and form.
In the present embodiment, more than the fusing point at resin combination by strap 10, carried out forming under pre-heated state insulation-coated 11, thereby eliminate the temperature difference between the temperature of resin combination and the temperature of conductor that is expressed into strap 10.Thus, the resin combination of extruding did not solidify in the moment contacting with strap 10, maintained the state of melting, thereby was cured under the state having connected airtight fully with strap 10.Thus, insulation-coated 11 is high with the adhesion of strap 10, suppresses coating and float off.
On the other hand, if be normal temperature in the temperature that forms insulation-coated 11 o'clock straps 10, the temperature that is strap 10 is lower than resin combination, the resin combination of extruding started to solidify in the moment contacting with strap 10, is cured and makes insulation-coated 11 under the state not connecting airtight fully with strap 10.In the case, as shown in Figure 3, the adhesion that has insulation-coated 11 pairs of straps 10 is low, produces the situation that coating floats off.
Insulation-coated 11 is more than the fusing point at resin combination by strap 10, to have carried out forming under pre-heated state, but the temperature that strap 10 is heated is (following, also be called preparation heating-up temperature) when too high, have resin combination foaming, insulation-coated 11 the situation of extruding outward appearance and reduce or occur variable color forming.Therefore, preferably more than the fusing point at resin combination by strap 10, foam and carried out forming insulation-coated 11 under pre-heated state below initial temperature.Accordingly, insulation-coated 11 is high with the adhesion of strap 10, has good extruding outward appearance and suppress variable color.
Form in insulation-coated 11 resin combination, comprise PPS resin or aromatic polyether ketone.PPS resin, aromatic polyether ketone are crystalline thermoplastic resins, show high partial discharge inception voltage and have excellent mechanical property, thermal endurance.As aromatic polyether ketone, list polyether-ether-ketone, PEKK, polyether-ketone etc., but consider preferred, polyethers ether ketone (PEEK resin) from obtaining easiness.
The in the situation that of comprising PPS resin in resin combination, more than the preparation heating-up temperature of strap 10 becomes the fusing point of PPS resin, more than 280 ℃.When PPS resin exceedes 300 ℃, extrude outward appearance and reduce, while exceeding 350 ℃, foam and variable color significantly.Thus, the in the situation that of comprising PPS resin in resin combination, the preparation heating-up temperature of strap 10 is made as more than 280 ℃, is preferably made as 280 ℃ above below 300 ℃.
In resin combination, comprise the in the situation that for example PEEK resin being as aromatic polyether ketone, the preparation heating-up temperature of strap 10 is more than the fusing point of PEEK resin, more than 340 ℃.When PEEK resin exceedes 360 ℃, extrude outward appearance and reduce, foaming and variable color significantly, thereby comprise PEEK resin in resin combination in the situation that, the preparation heating-up temperature of strap 10 is made as more than 340 ℃, be preferably made as 340 ℃ above below 360 ℃.
In resin combination, in order to improve all characteristics of insulation-coated 11 (mechanical property, insulating properties, with the adhesion of conductor etc.), also can contain other the resin except above-mentioned PPS resin or aromatic polyether ketone.Other resin is not particularly limited, but for example list: olefin-based copolymer resins, maleic anhydride, glycidyl methacrylate, syndiotactic polystyrene, polyimides, polyamide, polyamidoimide, thermoplastic polyimide, Polyetherimide, polymethylpentene, polybutylene terephthalate (PBT), PBN etc., or they are carried out to multiple combinations and the resin that obtains.
About other the content of resin, as long as the degree of not damaging the characteristic obtaining based on PPS resin or aromatic polyether ketone is not particularly limited.For example, according to the mode that adds up to 100 mass parts, be preferably made as that above 95 mass parts of PPS resin or aromatic polyether ketone 80 mass parts are following, below above 20 mass parts of other resin 5 mass parts.The content of the resin by making other is in above-mentioned scope, can further improve insulation-coated 11 mechanical property and partial discharge inception voltage.
Be explained, insulation-coated 11 thickness is not particularly limited, and selects optimum numerical value according to purposes.In the present embodiment, formed by low resins of relative dielectric constant such as PPS resins due to insulation-coated 11, even thereby thin thickness also demonstrate high partial discharge inception voltage.
(2) manufacture method of insulated electric conductor
Below, with reference to Fig. 4, the manufacture method of above-mentioned insulated electric conductor is described.Figure 4 shows that the skeleton diagram of an example of the manufacturing installation using in the manufacture method of insulated electric conductor of an embodiment of the invention.
The manufacture method of the insulated electric conductor 1 of present embodiment is the manufacture method that possesses strap 10, is formed at insulation-coated 11 insulated electric conductor 1 of the periphery of strap 10, and insulation-coated 11 are formed by the resin combination that comprises polyphenylene sulfide or aromatic polyether ketone, the method possesses following operation: the heating process more than the fusing point of resin combination, strap 10 being heated, and resin combination is extruded and in the periphery that is coated on warmed-up strap 10, formed insulation-coated 11 insulation-coated formation operation.
First, as shown in Figure 4, utilization is sent machine 20 and with the speed of regulation, strap 10 is sent, and imports to extruder 50.Before strap 10 imports extruder 50, utilize heater 30 that strap 10 is heated in advance.More than heating-up temperature being now made as to the fusing point of the resin combination of extruding, the fusing point that is preferably made as resin combination foams below initial temperature above.In the situation that resin combination contains PPS resin, heating-up temperature is more than 280 ℃, is preferably 280 ℃ above below 300 ℃.In the situation that resin combination contains PEEK resin as aromatic polyether ketone, heating-up temperature is more than 340 ℃ in addition, is preferably 340 ℃ above below 360 ℃.
As strap 10 being carried out to pre-heated method in heater 30, have energising heating, Hot-blast Heating, inductive heating etc., but be preferably energising heating.About Hot-blast Heating, the surface radiating resistance (W/mm of strap 10
2℃) smaller, the efficiency of heating surface is low, thereby in the case of increasing the coiling speed in insulation-coated formation operation, heats distance increase.Its result, for example, Hot-blast Heating in the situation that, need sometimes, to all carrying out nitrogen replacement in stove, to make to produce rate variance in nitrogen.The energy loss of inductive heating is the height of 90% left and right, the efficiency of heating surface is 10% left and right, is non-efficiency.In addition, change because the dislocation of strap 10 etc. makes the efficiency of heating surface, thereby in strap 10, produce temperature deviation, have the situation of the temperature that cannot be preheating to regulation.On the other hand, the logical electrically heated efficiency of heating surface is 50% above height, can strap 10 be heated in the short time.Further, also can suppress the temperature deviation of strap 10.
In heater 30, strap 10 is carried out, in pre-heated situation, preferably in non-active gas atmosphere, heating.Strap 10 is heated and while becoming the condition of high temperature, there is the tendency that oxidation occurs on the surface of exposing, and has the situation that insulation-coated 11 the adhesion on strap 10 surfaces reduces that is formed at.Thus, by strap 10 being heated in non-active gas atmosphere, can suppress the oxidation of strap 10.Be not particularly limited as non-active gas, but preferred low cost and be the nitrogen of general gas.
Be explained, also can before warmed-up strap 10 is imported to extruder 50, be inserted through insulating tube 40.Utilize insulating tube 40, can suppress the reduction of the temperature of warmed-up strap 10.In addition, also can, with non-active gas by interior insulating tube 40 displacement, suppress the surperficial oxidation of strap 10.
Then, warmed-up strap 10 is imported to extruder 50.In extruder 50, by utilize heating and melting resin combination directly extrude the periphery that is coated on strap 10.Extruding in coating, strap 10 is heated and more than becoming the fusing point of resin combination, and the resin combination of melting can not contact with strap 10 and moment solidifies, melting and maintain the state that mobility is high.Molecular resin can enter the surface (metal surface) in strap 10 thus.
Then, by by resin combination coating strap 10 import tank 60.By tank 60 by utilize heating and melting resin combination cooling, be cured and make insulation-coated 11, thereby obtain insulated electric conductor 1.Insulation-coated 11 is to enter under the surperficial state of strap 10 and solidify at the molecular resin of resin combination, thereby high with the adhesion of strap 10 under the effect of so-called anchoring effect.,, according to the insulated electric conductor 1 of present embodiment, in the time being processed as coil, can suppress to float off, break etc. because of the coating that the low adhesion of insulation-coated 11 pairs of straps 10 occurs.
Finally, utilize coiling machine 70 that obtained insulated electric conductor 1 is batched.
The effect of present embodiment
According to present embodiment, play one or more effects shown below.
According to the insulated electric conductor of present embodiment, insulation-coated having carried out more than the fusing point at resin combination by strap forms under pre-heated state.Thus, in insulated electric conductor, the insulation-coated adhesion to strap is high.Thus, even stretch in the time being processed as coil, and in the case of along such having applied harsh machining stress of curved edge, be also difficult for occurring coating and float off, be difficult for breaking at insulation-coated surface generation crackle etc.
In addition, according to the insulated electric conductor of present embodiment, the insulation-coated strap that is directly formed at being formed by the resin combination that comprises PPS resin, PEEK resin, does not need to insert other resin bed, therefore can realize thin diameter.
In addition, according to the insulated electric conductor of present embodiment, insulation-coated preferred foaming more than the fusing point at resin combination by strap carried out forming under pre-heated state below initial temperature.Thus, insulation-coated not only to extrude outward appearance good, and suppress the variable color being caused by foaming.
According to the manufacture method of present embodiment, have strap is carried out to pre-heated heating process.Thus, can improve the insulation-coated adhesion to strap being formed by PPS resin etc., be formed directly in strap.That is, need between insulation-coated and strap, wall be set, therefore manufacturing process can be simplified, can lower manufacturing cost.
In addition, in the manufacture method of present embodiment, preferably heat strap is heated by energising.According to energising heating, can strap be heated in the short time, and can suppress the deviation of the heating-up temperature of strap, thereby can further improve the insulation-coated adhesion to strap.
In addition, in the manufacture method of present embodiment, preferably in non-active gas atmosphere, strap is heated.In non-active gas atmosphere, heat, thereby can suppress the lip-deep oxidation of strap, can further improve the insulation-coated adhesion to strap.
Other execution mode
In above-mentioned execution mode, as conductor, the situation that is slightly rectangular-shaped strap to Usage profile is illustrated, but the present invention is not limited to this.According to the present invention, the mode of the temperature of conductor when insulation-coated according to elimination formation and the temperature difference of the temperature of resin is carried out, and is not limited to the section shape of conductor, can obtain above-mentioned effect.As the section shape of conductor, also can use the round conductor of the section with circular shape.
Embodiment
Embodiments of the invention are described below.In the present embodiment, manufacture insulated electric conductor, evaluate insulation-coated by processability, the outward appearance of insulated electric conductor.These embodiment are examples for insulated electric conductor of the present invention, and the present invention is not limited to the examples.
(1) material
The material using in following embodiment and comparative example as shown below.
As matrix resin, use material below.
Polyphenylene sulfide: Toray Industries, Inc. system " TORELINA " (280 ℃ of fusing points)
Polyether-ether-ketone: Daicel-Evonik Ltd. system " VESTAKEEP " (340 ℃ of fusing points)
Polyamide: Kuraray system " Genestar " (306 ℃ of fusing points)
As conductor, use conductor below.
Copper cash: strap (section shape: about 3mm × about 2mm)
(1) manufacture of insulated electric conductor
Use above-mentioned material and manufactured insulated electric conductor.In the manufacture of insulated electric conductor, utilize the manufacturing installation shown in Fig. 4 to carry out.
Copper cash is sent with the speed of regulation by sending machine 20, utilized heater 30 under nitrogen atmosphere, copper cash energising to be heated, copper cash has been carried out to heating in advance.Warmed-up preparation copper cash is inserted through to insulating tube 40, imports extruder 50.In extruder 50, the resin combination that comprises polyphenylene sulfide and polyamide than 90:10 with mass parts is extruded to periphery and the coating in copper cash.Thereafter, by by resin combination coating copper cash import tank 60, by the cooling insulated electric conductor of having manufactured.Be explained, extruding in coating of resin combination, the mode becoming below the above 0.20mm of 0.15mm according to insulation-coated thickness is carried out.
In embodiment 1,2, changing the preparation heating-up temperature of copper cash, be 280 ℃ in embodiment 1, is 300 ℃ in embodiment 2.
Embodiment 3,4
In embodiment 3,4, use and comprise as the polyether-ether-ketone of aromatic polyether ketone and the resin combination of polyamide than 90:10 using mass parts, change the preparation heating-up temperature of copper cash, in addition, similarly manufacture insulated electric conductor with embodiment 1,2.In embodiment 3, preparation heating-up temperature is made as to 340 ℃, in embodiment 4, is made as 360 ℃.Creating conditions of the insulated electric conductor of embodiment 1～4 is shown in following table 1.
Table 1
Comparative example 1,2
In comparative example 1,2, change the preparation heating-up temperature of copper cash, in addition, similarly manufacture insulated electric conductor with embodiment 1,2.In comparative example 1, will prepare 200 ℃ of heating-up temperatures, in comparative example 2, be made as 250 ℃.
Comparative example 3,4
In comparative example 3,4, change the preparation heating-up temperature of copper cash, in addition, similarly manufacture insulated electric conductor with embodiment 3,4.In comparative example 3, preparation heating-up temperature is made as to 250 ℃, in comparative example 4, is made as 310 ℃.Creating conditions of the insulated electric conductor of comparative example 1～4 is shown in following table 2.
Table 2
(2) evaluation of insulated electric conductor
Then, processability and the outward appearance of the insulated electric conductor to embodiment 1～4 and comparative example 1～4 are evaluated.Evaluation method is separately carried out to following explanation.
Processability
About the processability of insulated electric conductor, by evaluating along curved edge test according to JISC3216-2.Particularly, the two ends of the insulated electric conductor of the long 200mm of test are stretched, after stretching 30%, along the periphery of pole of the diameter of 1 times with conductor width, be held in same plane, by central portion along border land bending 180 degree, now, by not producing in insulation-coated, coating floats off and the situation of chap (crackle) is made as "○" (qualified), will middlely produce that coating floats off or situation about chapping is made as "×" (defective) insulation-coated.
Outward appearance
About the outward appearance of insulated electric conductor, confirm to have or not foaming on insulation-coated surface, be made as "○" (qualified) by not producing foaming and smooth situation, the situation of confirming foaming is made as to "×" (defective).
(3) evaluation result
In embodiment 1～4, after copper cash being heated to the temperature more than fusing point of resin combination, resin combination is extruded to coating and formed insulation-coated, thereby as shown in Figure 2, copper cash (strap 10) is high with insulation-coated 11 adhesion, does not confirm insulation-coated 11 peel off, float off.In the time that the insulated electric conductor that uses embodiment 1～4 is manufactured coil, insulated electric conductor is stretched, and applied the such harsh machining stress along curved edge, but do not confirmed that on this insulation-coated surface crackle etc. breaks, the processability evaluation of any is all "○".
In addition, in embodiment 1～4, copper cash is heated below the foaming initial temperature of resin combination and form insulation-coatedly, thereby insulation-coated outward appearance is smooth and good, also do not confirm in addition variable color, the ocular estimate of any is all "○".
On the other hand, in comparative example 1～4, heated in advance copper cash, but the fusing point of the not enough resin combination of its heating-up temperature therefore as shown in Figure 3, is confirmed insulation-coated peeling off, float off.Use the insulated electric conductor of comparative example 1～4 to manufacture coil, but confirm that on its insulation-coated surface crackle etc. breaks, the processability evaluation of any is all "×".
In addition, in comparative example 1～4, copper cash is heated below the foaming initial temperature of resin combination and form insulation-coatedly, thereby insulation-coated outward appearance is smooth and good, also do not confirm in addition variable color, the ocular estimate of any is all "○".
As shown above, according to insulated electric conductor of the present invention, insulation-coated having carried out more than the fusing point at resin combination by conductor forms under pre-heated state, and the insulation-coated adhesion to conductor is high.Thus, even if insulated electric conductor of the present invention stretches in the time being processed as coil, and in the such situation that has applied harsh machining stress of curved edge, be also difficult for occurring coating and float off and/or be difficult for cracking on insulation-coated surface etc. and break.
Claims (5)
1. an insulated electric conductor, it is characterized in that, it possesses conductor and periphery insulation-coated that is formed at described conductor, described insulation-coated be to form as the resin combination of main component by comprising polyphenylene sulfide or aromatic polyether ketone, and described insulation-coated be more than the fusing point at described resin combination by described conductor, to have carried out forming under pre-heated state.
2. insulated electric conductor according to claim 1, is characterized in that, described insulation-coated be more than the fusing point at described resin combination by described conductor, foaming carried out forming under pre-heated state below initial temperature.
3. the manufacture method of an insulated electric conductor, it is the manufacture method that possesses conductor and be formed at the insulation-coated insulated electric conductor of the periphery of described conductor, and described insulation-coated be to form as the resin combination of main component by comprising polyphenylene sulfide or aromatic polyether ketone, this manufacture method is characterised in that, possess following operation: the heating process more than the fusing point of described resin combination, described conductor being heated, described resin combination is extruded and is coated on the periphery of warmed-up described conductor and forms insulation-coated insulation-coated formation operation.
4. the manufacture method of insulated electric conductor according to claim 3, is characterized in that, described heating process is to be heated described conductor is heated by energising.
5. according to the manufacture method of the insulated electric conductor described in claim 3 or 4, it is characterized in that, described heating process is in non-active gas atmosphere, described conductor to be heated.
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| JP2012255591A JP2014103045A (en) | 2012-11-21 | 2012-11-21 | Insulation wire and its manufacturing method |
| JP2012-255591 | 2012-11-21 |
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Cited By (4)
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| CN107004465A (en) * | 2014-09-09 | 2017-08-01 | 古河电气工业株式会社 | The manufacture method of insulated electric conductor, coil and electric/electronic and insulated electric conductor |
| CN107112083A (en) * | 2014-12-26 | 2017-08-29 | 古河电气工业株式会社 | Insulated electric conductor and coil |
| US20210313090A1 (en) * | 2018-11-26 | 2021-10-07 | Hitachi Metals, Ltd. | Cable and harness |
| CN114520071A (en) * | 2016-04-01 | 2022-05-20 | 格鲍尔格里勒金属有限公司 | Insulated electrical conductor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| GB201501601D0 (en) * | 2015-01-30 | 2015-03-18 | Victrex Mfg Ltd | Insulated conductors |
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| JPH03152811A (en) * | 1989-11-08 | 1991-06-28 | Furukawa Electric Co Ltd:The | Manufacture of heat resisting thin insulated wire |
| JP2008112669A (en) * | 2006-10-31 | 2008-05-15 | Toray Ind Inc | Coated wire and its manufacturing method |
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2012
- 2012-11-21 JP JP2012255591A patent/JP2014103045A/en active Pending
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2013
- 2013-10-17 CN CN201310488002.5A patent/CN103839612A/en active Pending
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107004465A (en) * | 2014-09-09 | 2017-08-01 | 古河电气工业株式会社 | The manufacture method of insulated electric conductor, coil and electric/electronic and insulated electric conductor |
| CN107112083A (en) * | 2014-12-26 | 2017-08-29 | 古河电气工业株式会社 | Insulated electric conductor and coil |
| CN107112083B (en) * | 2014-12-26 | 2019-09-27 | 古河电气工业株式会社 | Insulated electric conductor and coil |
| CN114520071A (en) * | 2016-04-01 | 2022-05-20 | 格鲍尔格里勒金属有限公司 | Insulated electrical conductor |
| US20210313090A1 (en) * | 2018-11-26 | 2021-10-07 | Hitachi Metals, Ltd. | Cable and harness |
| US11854713B2 (en) * | 2018-11-26 | 2023-12-26 | Proterial, Ltd. | Cable and harness |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2014103045A (en) | 2014-06-05 |
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Application publication date: 20140604 |