CN104464907A - Fluoride-free compressor enameled aluminum wire and preparation method thereof - Google Patents
Fluoride-free compressor enameled aluminum wire and preparation method thereof Download PDFInfo
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- CN104464907A CN104464907A CN201410819743.1A CN201410819743A CN104464907A CN 104464907 A CN104464907 A CN 104464907A CN 201410819743 A CN201410819743 A CN 201410819743A CN 104464907 A CN104464907 A CN 104464907A
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Abstract
The invention provides a fluoride-free compressor enameled aluminum wire and a preparation method of the fluoride-free compressor enameled aluminum wire. The fluoride-free compressor enameled aluminum wire comprises an aluminum wire rod and oil paint. The aluminum wire rod is coated with the oil paint. The preparation method is characterized in that adhesive force of the oil paint for covering the aluminum wire rod is improved, the aluminum wire rod is cleaned, a paint film coating and the painting process are improved, and the oil paint is modified; meanwhile, the paint film coating is additionally arranged, the paint film adhesiveness of the produced enameled aluminum wire is high, the production requirement of a fluoride-free compressor, especially a round enameled aluminum wire of the fluoride-free freezer compressor is met, an enameled copper wire is replaced with the enameled aluminum wire, and therefore production cost is greatly reduced.
Description
technical field:
The present invention relates to a kind of enamel insulated aluminium wire and preparation method thereof, particularly a kind of without freon compressing unit enamel insulated aluminium wire and preparation method thereof.
background technology:
The day by day maturation of enamel insulated aluminium wire production Technology, the price advantage of the continuous lifting of quality and products thereof, enamel insulated aluminium wire occupancy volume in enamelled wire market is caused constantly to expand, be widely used in motor, electrical equipment, electrical instrument, the winding of the electric products such as telecommunication installation and household electrical appliance and element, current without freon compressing unit enamel insulated aluminium wire also progressively substitute floride-free enamel covered wire, but floride-free refrigerating system must be accorded with without freon compressing unit enamelled wire in production with in using, alternative chlorofluoro carbon reaches environmental requirement, there is requirement to enamelled wire compatibility simultaneously, higher quality requirement is had than common enamelled wire, this is due to compressor, it can produce high-frequency impulse ripple in the course of the work, this pulse wave energy makes the insulation position accelerated ageing of motor and produces corona, destruction is produced to the insulation paint film of enamelled wire, common enamelled wire variable-frequency motor is easy to produce and punctures instantaneously, the life-span of motor significantly reduces.Compressor is all containing refrigerants such as R22, R134a, R407C, and these refrigerants have certain corrosivity.If enamelled wire long-term work under having refrigerant, refrigerator oil, high temperature, high pressure, having the environment of corrosion, it is except energy withstands corona effect, must have good refrigerant, high temperature resistant, corrosion-resistant, anti-high-tension ability.
Therefore the product tack without freon compressing unit enamel insulated aluminium wire has higher requirement, and will meet floride-free refrigerating system, the requirement of alternative chlorofluoro carbon, must set up and improve the experimental technique without freon compressing unit enamel insulated aluminium wire and related experiment equipment.
For improving enamel insulated aluminium wire and large gauge enamelled round aluminium wire with product tack, meet harsh manufacturing procedure, production technology and the improved product of optimizing enamel insulated aluminium wire are imperative, particularly to 220 grades of polyester (imines) composite polyamide acid imide enamelled round aluminium wire with inspection " pole winding " product requirements produced.
Therefore, how to solve and to meet the said goods quality requirement, improving the high tack of enamel insulated aluminium wire, produce the enamel insulated aluminium wire of the high tack that meets the requirements, meet the production requirement without the freon compressing unit particularly enamel insulated aluminium wire of freon-free refrigerator compressor, thus significantly reduce the production cost of the said goods.
summary of the invention:
The present invention will provide a kind of without freon compressing unit enamel insulated aluminium wire and preparation method thereof exactly, adopt the adhesive force improved on insulating paint metallized aluminum wire rod, comprise aluminium wire cleaning and improve enamelled coating and enamelling process, increase paint film coating simultaneously, make the enamel insulated aluminium wire paint film tack produced high, meet the production requirement without the freon compressing unit particularly enamelled round aluminium wire with of freon-free refrigerator compressor, and alternative enamel covered wire, thus significantly reduce production cost.
One of the present invention object is a kind of preparation method without freon compressing unit enamel insulated aluminium wire, comprise aluminium wire, paint, coating paint on aluminium wire, it adopts the adhesive force improved on paint metallized aluminum wire rod, comprises aluminium wire cleaning and improve paint film coating and enamelling process, to painting modification.
Preparation method without freon compressing unit enamel insulated aluminium wire of the present invention, it is characterized in that describedly improving paint film coating and enamelling process, its method step is:
(1) cleaned by aluminium wire, anneal, annealing temperature is: annealing 520 DEG C, upper strata, annealing lower floor 500 DEG C;
(2) paint: first bag is coated with bottoming enamelled coating, controlling under-coating varnish layer thickness is 0.002 ~ 0.008mm; Being coated with intermediate primer layers control thickness of paint layer in the outsourcing of bottoming enamelled coating is again 0.060 ~ 0.073mm; Then be coated with top coat layer at intermediate primer layers, chain of command thickness of paint layer is 0.017 ~ 0.024mm; For wet enamel insulated aluminium wire;
(3) cure: the wet enamel insulated aluminium wire of (2) step is placed in baker and cures, controlling toaster entrance temperature is 290 ~ 310 DEG C, and baker lower floor temperature is 340 ~ 370 DEG C, and baker central temperature is 450 ~ 460 DEG C, curing area temperature is 525 ~ 540 DEG C, is semi-finished product enamel insulated aluminium wire;
(4) the semi-finished product enamel insulated aluminium wire of (3) step is enamel insulated aluminium wire through cooling, lubrication, take-up, quality inspection, packaging.
Preparation method without freon compressing unit enamel insulated aluminium wire of the present invention, be increase the polar group in paint matrix molecule to paint modification described in it, described polar group is hydroxy-acid group.
The described preparation method without freon compressing unit enamel insulated aluminium wire, to aluminium wire cleaning described in it, adopts ultrasonic cleaning system to clean aluminium wire surface.
The described preparation method without freon compressing unit enamel insulated aluminium wire, it is 0.003 ~ 0.009mm that the japanning of its (2) step controls under-coating varnish layer thickness, intermediate layer paint layer thickness is 0.062 ~ 0.074mm, and top coat layer thickness is 0.018 ~ 0.025mm, and enamelled coating gross thickness is 0.082 ~ 0.107mm.
The described preparation method without freon compressing unit enamel insulated aluminium wire, it is 300 DEG C that its (3) step cures the inlet temperature controlling baker, and baker central temperature is 450 DEG C, and baker outlet temperature is 510 DEG C.
The described preparation method without freon compressing unit enamel insulated aluminium wire, controls rotation speed of fan when its (3) step is cured: major cycle blower fan 2000 ~ 2500R/min; Lower fire door sucking-off blower fan 1300 ~ 1800R/min.
Another object of the present invention is a kind of without freon compressing unit enamel insulated aluminium wire preparing according to method recited above.
Preparation method of the present invention, ultrasonic cleaning system described in it preferably includes ultrasonic wave shake plate, rinsing bowl, blow-dry device, and described rinsing bowl comprises cleaning agent rinse bath and clear water potcher.
Improvement paint paint film coating of the present invention adopts 3-4 coating structure.
The inventive method prepares enamel insulated aluminium wire or enamelled round aluminium wire with, and it is applied to without freon compressing unit, particularly on freon-free refrigerator compressor.
The enamelled round aluminium wire with without freon compressing unit that the present invention adopts said method to prepare, significantly improve insulating varnish paint film coating and be attached to adhesive force on aluminum steel, the large gauge enamel insulated aluminium wire particularly prepared and conventional enamelled wire surface is smooth, uniform in color, without beading up, paint knurl, blackspot, damage, cut, naked aluminium, injure, the defect such as line flower.Inadhesion under normal temperature, winding displacement are even; Tack is very good, in thermal endurance, resistance to deterioration, film integrity, corrosion-resistant, anti-high voltage etc., possess excellent performance.
There will not be the phenomenon that enameled wire coat ftractures, particularly during coiling perpendicular type coil, due at enamelled wire in the coiling of winding process high speed, for guaranteeing that coil molding is good, apply pulling force and reach about 10KG, enamelled wire is stretched about 10% by force, and enamelled wire also can not be caused at right-angle turning place paint film cracking.
The paint film coating structure of aluminum steel and copper cash have different, the tack of aluminum steel is not as good as copper cash, enamel insulated aluminium wire is when compressor coiling is produced, and paint film easily loses attachment cracking, so demand multi-coat combination is produced, solve the problem of tack difference, the present invention adopts 4 coating structures, i.e. many 1 layer of more existing copper cash, thus solves the low problem of paint film coating adhesion, on equipment, 4 coat of paint structures, also can realize the adjustment of different coating structure proportion.
The present invention is in order to improve the method for adhesive force, and one is by clean improvement: the adhesive force that greatly can reduce paint film at the material such as aluminium powder, greasy dirt, dust on aluminium surface itself, therefore the present invention adopts ultrasonic cleaning system to clean aluminum steel surface.
The present invention uses Ultrasonic Cleaning principle for high-frequency oscillation signal, change into high frequency machinery oscillating ultrasonic ripple by ultrasonic transducer thus propagate in medium cleaning fluid, the radiation of ultrasonic wave in cleaning fluid, make fluid thrill and produce ten hundreds of micro-bubbles, the negative pressuren zone that these bubbles are formed in ultrasonic wave longitudinal propagation produces, growth, and at zone of positive pressure rapid closing, be called as in the process of cavitation effect this, can produce when micro-bubble closes more than 1000 atmospheric instantaneous pressures. the instantaneous pressure successively produced, continuous impact object surface just as a succession of little blast, be aluminum steel surface and gap in dirt rapid deterioration, thus reach the object of cleaning aluminum steel.
Ultrasonic cleaning system apparatus of the present invention, comprise ultrasonic wave shake plate, blowing dryer, tank, described tank comprises cleaning agent rinse bath and clear water potcher, by the cleaning device of this structure, the aluminium powder on surface, greasy dirt and dust are removed by ultrasonic cleaner by aluminum steel, effective raising surface quality, enamelled wire product improves adhesive force.
The technical parameter of the ultrasonic cleaning system equipment that the present invention adopts is its ultrasonic frequency of control is 26-30kHz, is preferably 28kHz.
The present invention adopts said method and device effectively to be removed by the polluter such as aluminium powder, greasy dirt, dust on aluminium wire and large gauge aluminium wire surface, to Ultrasonic Cleaning be had and there is no the contrast of Ultrasonic Cleaning, same aluminium and board, before using Ultrasonic Cleaning, be pressed in above bare wire by white paper towels and ran for 10 seconds, paper handkerchief stays clearly " black line " that aluminium powder is formed, after using Ultrasonic Cleaning, same test, paper handkerchief be can't see substantially " black line "
Obtained 220 grades of polyester (imines) the composite polyamide acid imide enamelled round aluminium wire with production costs of method of the present invention are low, and tack is very good, in thermal endurance, resistance to deterioration, film integrity, corrosion-resistant, anti-high voltage etc., possess excellent performance.
embodiment:
Below in conjunction with concrete preferred embodiment, the present invention is further illustrated, but protection scope of the present invention is not limited to these preferred embodiments.The material used in the present embodiment is all by commercially available acquisition.
embodiment 1
The present embodiment on aluminium wire, applies paint with aluminium wire or large gauge aluminium wire for baseline or for insulating paint, be increase the polar group in paint matrix molecule to insulating paint modification, described polar group is hydroxy-acid group; Also carbonyl or amino be can use, but preferably hydroxy-acid group and COOH group used; This is that can be conducive to improving its adhesive force, film forming matter polarity is larger, and adhesive force is stronger, adhesive force can be made significantly to strengthen when therefore adding polar substances in film forming matter owing to containing polar group in paint matrix molecule.It is be applied to the material containing above-mentioned group that coating oil paints film that the present invention adds COOH group; Described increase insulating paint paint film coating is the paint film controlled on aluminum steel is 3-4 coating structure; This example selects coating 3 layers of paint film.
Adopt ultrasonic cleaning system to carry out clean improvement to the surface of aluminium wire to the cleaning of aluminium wire or large gauge aluminium wire, namely the material such as aluminium powder, greasy dirt, dust on aluminium wire surface itself is cleaned, because its existence can reduce the adhesive force of paint film greatly;
Ultrasonic Cleaning principle is high-frequency oscillation signal, change into high frequency mechanical oscillation (ultrasonic wave) by ultrasonic transducer and propagate in medium (cleaning fluid), the radiation of ultrasonic wave in cleaning fluid, make fluid thrill and produce ten hundreds of micro-bubbles, the negative pressuren zone that these bubbles are formed in ultrasonic wave longitudinal propagation produces, growth, and at zone of positive pressure rapid closing, be called as in the process of cavitation effect this, can produce when micro-bubble closes more than 1000 atmospheric instantaneous pressures. the instantaneous pressure successively produced, continuous impact object surface just as a succession of little blast, be aluminum steel surface and gap in dirt rapid deterioration, thus reach the object of cleaning aluminum steel.
Of the present inventionly improve enamelled coating and its method step of enamelling process is be described with the bag paint method of 220 grades of polyester (imines) composite polyamide acid imide enamelled round aluminium wire with, concrete steps are as follows:
(1) cleaned by aluminium round wire with water, annealing, annealing temperature is: annealing 520 DEG C, upper strata, annealing lower floor 500 DEG C;
(2) paint: mold painting method, be first coated with bottoming enamelled coating with varnish bag, prime coat thickness is 0.002mm; Secondly being coated with intermediate primer layers thickness with polyester-imide polyamidoimide in the outsourcing of bottoming enamelled coating is 0.062 (0.064) mm, then is coated with top coat layer with polyamidoimide in intermediate primer layers outsourcing, and top coat layer thickness is 0.018 (0.082) mm;
(3) cure: toaster entrance temperature is 290 DEG C, baker lower floor temperature is 340 DEG C; Curing area: 525 DEG C;
(4) rotation speed of fan: major cycle blower fan 2000R/min; Lower fire door sucking-off blower fan 1300R/min;
(5) cooling, lubrication, take-up, quality inspection, packaging i.e. obtained aluminium enamel-covered wire product of the present invention.
Unless otherwise indicated all the other undeclared parts are all identical with the illustration method in embodiment 1 for each embodiment below.
embodiment 2
The bag paint method of 220 grades of polyester (imines) composite polyamide acid imide enamelled round aluminium wire with, step is as follows:
(1) cleaned by aluminium round wire with water, annealing, annealing temperature is: annealing 520 DEG C, upper strata, annealing lower floor 500 DEG C;
(2) paint: mold painting method, be first coated with bottoming enamelled coating with varnish bag, prime coat thickness is 0.004mm; Secondly being coated with intermediate primer layers thickness with polyester-imide polyamidoimide in the outsourcing of bottoming enamelled coating is 0.065 (0.069) mm, then is coated with top coat layer with polyamidoimide in intermediate primer layers outsourcing, and top coat layer thickness is 0.020 (0.089) mm;
(3) cure: toaster entrance temperature is 300 DEG C, baker lower floor temperature is 350 DEG C; Curing area: 530 DEG C;
(4) rotation speed of fan: major cycle blower fan 2200R/min; Lower fire door sucking-off blower fan 1400R/min;
(5) cooling, lubrication, take-up, quality inspection, packaging.
embodiment 3
The bag paint method of 220 grades of polyester (imines) composite polyamide acid imide enamelled round aluminium wire with, step is as follows:
(1) cleaned by aluminium round wire with water, annealing, annealing temperature is: annealing 520 DEG C, upper strata, annealing lower floor 500 DEG C;
(2) paint: mold painting method, be first coated with bottoming enamelled coating with varnish bag, prime coat thickness is 0.006mm; Secondly being coated with intermediate primer layers thickness with polyester-imide polyamidoimide in the outsourcing of bottoming enamelled coating is 0.069 (0.075) mm, then is coated with top coat layer with polyamidoimide in intermediate primer layers outsourcing, and top coat layer thickness is 0.022 (0.097) mm;
(3) cure: toaster entrance temperature is 310 DEG C, baker lower floor temperature is 360 DEG C; Curing area: 540 DEG C;
(4) rotation speed of fan: major cycle blower fan 2300R/min; Lower fire door sucking-off blower fan 1500R/min;
(5) cooling, lubrication, take-up, quality inspection, packaging.
embodiment 4
The bag paint method of 220 grades of polyester (imines) composite polyamide acid imide enamelled round aluminium wire with, step is as follows:
(1) cleaned by aluminium round wire with water, annealing, annealing temperature is: annealing 520 DEG C, upper strata, annealing lower floor 500 DEG C;
(2) paint: mold painting method, be first coated with bottoming enamelled coating with varnish bag, prime coat thickness is 0.008mm; Secondly being coated with intermediate primer layers thickness with polyester-imide polyamidoimide in the outsourcing of bottoming enamelled coating is 0.073 (0.081) mm, then is coated with top coat layer with polyamidoimide in intermediate primer layers outsourcing, and top coat layer thickness is 0.024 (0.105) mm;
(3) cure: toaster entrance temperature is 320 DEG C, baker lower floor temperature is 370 DEG C; Curing area: 530 DEG C;
(4) rotation speed of fan: major cycle blower fan 2400R/min; Lower fire door sucking-off blower fan 1600R/min;
(5) cooling, lubrication, take-up, quality inspection, packaging.
embodiment 5
The bag paint method of 220 grades of polyester (imines) composite polyamide acid imide enamelled round aluminium wire with, step is as follows:
(1) cleaned by aluminium round wire with water, annealing, annealing temperature is: annealing 520 DEG C, upper strata, annealing lower floor 500 DEG C;
(2) paint: mold painting method, be first coated with bottoming enamelled coating with self-adhesion enamel-cover, prime coat thickness is 0.002mm; Secondly being coated with intermediate primer layers thickness with polyester-imide polyamidoimide in the outsourcing of bottoming enamelled coating is 0.062 (0.064) mm, then is coated with top coat layer with polyamidoimide in intermediate primer layers outsourcing, and top coat layer thickness is 0.018 (0.082) mm;
(3) cure: toaster entrance temperature is 290 DEG C, baker lower floor temperature is 340 DEG C; Curing area: 528 DEG C;
(4) rotation speed of fan: major cycle blower fan 2000R/min; Lower fire door sucking-off blower fan 1300R/min;
(5) cooling, lubrication, take-up, quality inspection, packaging.
embodiment 6
The bag paint method of 220 grades of polyester (imines) composite polyamide acid imide enamelled round aluminium wire with, step is as follows:
(1) cleaned by aluminium round wire with water, annealing, annealing temperature is: annealing 520 DEG C, upper strata, annealing lower floor 500 DEG C;
(2) paint: mold painting method, be first coated with bottoming enamelled coating with self-adhesion enamel-cover, prime coat thickness is 0.004mm; Secondly being coated with intermediate primer layers thickness with polyester-imide polyamidoimide in the outsourcing of bottoming enamelled coating is 0.065 (0.069) mm, then is coated with top coat layer with polyamidoimide in intermediate primer layers outsourcing, and top coat layer thickness is 0.020 (0.089) mm;
(3) cure: toaster entrance temperature is 300 DEG C, baker lower floor temperature is 350 DEG C; Curing area: 530 DEG C;
(4) rotation speed of fan: major cycle blower fan 2200R/min; Lower fire door sucking-off blower fan 1400R/min;
(5) cooling, lubrication, take-up, quality inspection, packaging.
embodiment 7
The bag paint method of 220 grades of polyester (imines) composite polyamide acid imide enamelled round aluminium wire with, step is as follows:
(1) cleaned by aluminium round wire with water, annealing, annealing temperature is: annealing 520 DEG C, upper strata, annealing lower floor 500 DEG C;
(2) paint: mold painting method, be first coated with bottoming enamelled coating with self-adhesion enamel-cover, prime coat thickness is 0.006mm; Secondly being coated with intermediate primer layers thickness with polyester-imide polyamidoimide in the outsourcing of bottoming enamelled coating is 0.069 (0.075) mm, then is coated with top coat layer with polyamidoimide in intermediate primer layers outsourcing, and top coat layer thickness is 0.022 (0.097) mm;
(3) cure: toaster entrance temperature is 310 DEG C, baker lower floor temperature is 360 DEG C; Curing area: 520 DEG C;
(4) rotation speed of fan: major cycle blower fan 2300R/min; Lower fire door sucking-off blower fan 1500R/min;
(5) cooling, lubrication, take-up, quality inspection, packaging.
embodiment 8
The bag paint method of 220 grades of polyester (imines) composite polyamide acid imide enamelled round aluminium wire with, step is as follows:
(1) cleaned by aluminium round wire with water, annealing, annealing temperature is: annealing 520 DEG C, upper strata, annealing lower floor 500 DEG C;
(2) paint: mold painting method, be first coated with bottoming enamelled coating with self-adhesion enamel-cover, prime coat thickness is 0.008mm; Secondly being coated with intermediate primer layers thickness with polyester-imide polyamidoimide in the outsourcing of bottoming enamelled coating is 0.073 (0.081) mm, then is coated with top coat layer with polyamidoimide in intermediate primer layers outsourcing, and top coat layer thickness is 0.024 (0.105) mm;
(3) cure: toaster entrance temperature is 320 DEG C, baker lower floor temperature is 370 DEG C; Curing area: 530 DEG C;
(4) rotation speed of fan: major cycle blower fan 2400R/min; Lower fire door sucking-off blower fan 1600R/min;
(5) cooling, lubrication, take-up, quality inspection, packaging.
Below utilize the inventive method to produce 220 grades of freon-free refrigerator compressor enamelled round aluminium wire with products, i.e. the technical requirement standard that reaches of 220 grades of polyester (imines) composite polyamide acid imide enamelled round aluminium wire with.
Freon-free refrigerator compressor enamelled round aluminium wire with technical standard requires:
Reference to standard:
IEC 60317-0-3 extraordinary winding wire product standard the 0th part General Requirements
Section 3 enamelled round aluminium wire with,
NEMA MW35-A thermal level 220 polyester-imide composite polyamide acid imide enamelled round aluminium wire with,
IEC 60851 winding wire test method, JIS C3003 winding wire test method;
Operating characteristic: the thermal level of product is 220 grades.
Enamelled wire structure:
Enamelled wire is double-layer paint film structure: varnish+EI+AI; 4.2 minimum finish paint ratios are more than or equal to 20%;
Model and title:
Model and title are in table 1.
Table 1:
| GB model | Title |
| Q(ZY/XY)L-2/220 | 220 grades of paste paint film polyester-imide composite polyamide acid imide enamelled round aluminium wire with |
Technical requirement: every technical requirement should meet table 2 and specify.
Table 2:
Percentage elongation: percentage elongation should be greater than subordinate list 3 and specify; Springback angle: springback angle should be less than maximum spring back angle in table 3.
Table 3:
Note: for the intermediate sizes of conductor nominal diameter, should get the maximum springback angle of next largest conductor diameter.
Stretch and pole winding: carry out stretching according to the test method of NEMA standard MW1000 and after pole winding, paint film does not ftracture.Stretch and reel rod according to following table 4 requirement.
Table 4:
Note: D represents enamelled wire external diameter.
Jerk disconnected: nominal diameter 1.600mm and following, after jerk test, after fracture port, enamelled wire is cut off by 5cm place, and whether the paint film between inspection fracture port and the place of cutting off loses tack.
Thermal shock: according to winding rod winding in following table 5, toast 30min at 240 DEG C of temperature, paint film should not ftracture.
Softening to puncture: constant temperature method: 340 DEG C did not puncture in two minutes.
Scrape paint: resistance to scraping force is not less than table 5 and specifies.
Table 5:
Note: for the intermediate sizes of conductor nominal diameter, should get the minimum average B configuration scraping force numerical value of next largest conductor diameter.
High temperature puncture voltage: sample is at the temperature of 280 DEG C, and minimum break-down voltage value should be not less than 75% of the breakdown voltage value under normal room temperature.
Film integrity: nominal diameter 1.600mm and following, the number of defects (high pressure needle hole count) in every 30m length should be no more than table 6 setting.Two sections should be extracted in addition as do not met, all should meet the requirements.
Table 6
| Conductor nominal diameter (mm) | Test voltage (V) | High pressure needle hole count (≤) |
| 0.500 and following | 1500 | 3 |
| 0.510～1.100 | 2000 | 3 |
Salt solution pin hole: get and be about 6m sample, in 5m immersion test liquid, experimental liquid is the saline solution of concentration 0.2%, add 3% appropriate phenolphthalein alcoholic solution in saline solution, experimental liquid is positive pole, and sample conductor is negative pole, impose the direct voltage 1 minute of 12V, check the pinhole number produced.Pin hole quantity should be no more than 2, should extract two sections in addition, all should meet the requirements as do not met.
Winding pin hole (water in winding): on pole specify by table 7 with the enamelled wire being no less than 10 circles, reel 3 circles in water, and immersing concentration is (add the phenolphthalein of 3% in saline solution) in the saline solution of 0.2%, and applying 12V direct voltage keeps 1 minute.The pinhole number at winding place, should be not more than 2, should extract two sections in addition, all should meet the requirements as do not met.
Table 7
| Specification (mm) | Winding diameter of the rod (mm) |
| 0.26~0.45 | 8 |
| 0.46~0.75 | 13 |
| 0.76~1.30 | 20 |
Enamel insulated aluminium wire resistance.: enamel insulated aluminium wire resistance requirement sees attached list.
Computing formula is:
r 20 =Rt × α t
rt---represent t
0the resistance value measured under C condition, unit Ω.
α t---represent scaling factor, in table 8.
Table 8:
Surface oil content detects by quality determination method, and oil content scope should be below 120mg/KG.
Compatibility: ethanol test method,
Get the beaker that 1000ml put into by 250 ± 5g enamelled round aluminium wire with sample, add the complete submergence sample of R141b, heat under 100 ± 10 DEG C of conditions after ten minutes and clean; Mixed solution after cleaning is poured in the beaker of another 1000ml, then the soluble impurity of distillation removing; Residue is poured one into and is weighed in advance in the 50ml beaker of (W1).To change beaker heating, drying 1 hour under 100 ± 10 DEG C of conditions, taken out by beaker and be placed in more than room temperature half an hour, weigh (W2), calculates residue weight: W2-W1; Get this residue weight and be about 200mg, be placed in a 250ml beaker, add 50 ± 10ml absolute ethyl alcohol, and heat to be placed on room temperature 25 ± 2 DEG C after steaming is boiled 1 minute at cooling leave standstill 1 hour, observe and generate with or without White Flocculus; If generate without White Flocculus, then solution is placed in the cooling of-30 ± 5 DEG C of environment after 12 hours again at room temperature 25 ± 2 DEG C cooling leave standstill 12 hours, still separate out from solution weight without White Flocculus, then can judge that lubricant is qualified, otherwise judge defective; In above each step, all open firing can not be used.
R134a tests: get about 20mg Lacquered wire lubricating oil and the mixing of 50ml Esters oil, stir; 6.14.2.2 get this mixed solution 2.5ml with syringe needle and inject a test tube, then add about 10ml R134a.; In-30 ± 5 DEG C of environment, observe mixed solution in test tube, in 24 hours, solution answers no suspended substance, muddiness, White Flocculus to occur; Inspection judges conclusion: in above ambient temperature range, if mixed solution had suspended matter, muddiness, White Flocculus to occur in 24 hours, then judge that enamelled wire compatibility test is defective.
Refrigerant:
Foaminess:
Get 3, the sample that length is 200mm, heat in the pressure cooker of 125 ± 3 DEG C after 1 hour and be cooled to room temperature.In temperature is the R22 of 90 ± 5 DEG C and refrigerator oil (SUNISO 4GSD) mixed liquor, (R22: refrigerator oil=6:4 volumetric ratio, 1/2 of pressure cooker volume) leaching 24 hours.Taken out by sample under pressure cooker temperature drops to normal temperature, put into rapidly the thermostat of 120 ± 5 DEG C, heat after 10 minutes and take out, after specimen temperature gets back to normal temperature, whether range estimation paint film foams.Coupon results is 1 sample when there is the foaming of 2 about below 2mm, should get 3 samples again, test of reforming, if non-gassing, just can be judged to not foam from identical drum;
R22 extracts: nominal diameter more than 0.100, and the extract percentage of less than 2.500 enamelled wire samples should be no more than 0.20%;
Temperature tolerance: the relevant temperature in 20000 hours extrapolation life-spans is not less than 200 degree, and the thermal life under minimum test temperature is no less than 5000 hours;
The paint film degree of eccentricity: get 100mm Enough long sample, after transversely cutting, detects under 100 power microscopes, measures the maximum paint film thickness angle value δ max of radial direction in same cross section and minimum paint film thickness angle value δ min, and obtains ratio.
δmax/δmin≤1.6；
Confficient of static friction: each specifications and models enamelled wire confficient of static friction≤0.15;
Resistant to deterioration: get suitable length sample, put into 300 DEG C of insulating box bakings 168 hours, sample makes puncture voltage after taking out at normal temperatures, and its breakdown voltage value is not less than 65% of the breakdown voltage value under normal room temperature;
Oil resistance: in experiment not after impregnation process, enamelled wire surface should not tarnish and not produce peeling phenomenon, and hardness of paint film should be greater than 2H
;
Solvent resistant: enamelled wire is in standard solvent, and hardness of paint film all should be not less than 2H after room temperature and 180 DEG C soak 30 minutes respectively;
Enameled wire surface quality: enamelled wire surface is smooth, uniform in color, should without paint knurl, blackspot, damage, cut, naked aluminium, injure, the defect such as line flower, bright spot.Inadhesion under normal temperature, winding displacement are even;
Enamelled wire should neatly closely around on drum, and the line segment on every axle enamelled wire only has one;
storage cycle: the storage cycle of enamelled wire is 12 months, should again check more than 12 months.
Subordinate list 1
Note: for the intermediate sizes of nominal diameter, should get the maximum springback angle of next conductor diameter; The product of below 0.250mm is to springback angle not requirement.
Subordinate list 2.
It is the technical parameter of each specification product in above subordinate list 2.
Utilize the product obtained by this method and tradition to contrast by existing National Standard of the People's Republic of China GB/T 4074.1-8-2008 enamel-cover aluminium circle winding wire and see the following form 9:
The present invention also can adopt following bag paint method to produce with 220 grades of freon-free refrigerator compressor enamel insulated aluminium wires, and step is as follows:
(1) cleaned by aluminium round wire with water, annealing, annealing temperature is: annealing 400 DEG C, upper strata, annealing 390 DEG C, middle level, annealing lower floor 380 DEG C;
(2) paint: mold painting method, be first coated with bottoming enamelled coating with varnish bag, prime coat thickness is 0.005mm; Secondly being coated with intermediate primer layers thickness with polyester-imide polyamidoimide in the outsourcing of bottoming enamelled coating is 0.031 (0.036) mm, then is coated with top coat layer with polyamidoimide in intermediate primer layers outsourcing, and top coat layer thickness is 0.016 (0.052) mm;
(3) cure: toaster entrance temperature is 395 DEG C, baker central temperature is 455 DEG C, and baker outlet temperature is 495 DEG C.
Illustrate: above embodiment is the present invention's preferably execution mode; but embodiments of the present invention are not restricted to the described embodiments; change, the modification done under other any does not deviate from Spirit Essence of the present invention and principle, substitute, combine, simplify; all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (8)
1. the preparation method without freon compressing unit enamel insulated aluminium wire, comprise aluminium wire, paint, coating paint on aluminium wire, is characterized in that adopting the adhesive force improved on paint metallized aluminum wire rod, comprises aluminium wire cleaning and improves paint film coating and enamelling process, to painting modification.
2., according to the preparation method without freon compressing unit enamel insulated aluminium wire according to claim 1, it is characterized in that describedly improving paint film coating and enamelling process, its method step is:
(1) cleaned by aluminium wire, anneal, annealing temperature is: annealing 520 DEG C, upper strata, annealing lower floor 500 DEG C;
(2) paint: first bag is coated with bottoming enamelled coating, controlling under-coating varnish layer thickness is 0.002 ~ 0.008mm; Being coated with intermediate primer layers control thickness of paint layer in the outsourcing of bottoming enamelled coating is again 0.060 ~ 0.073mm; Then be coated with top coat layer at intermediate primer layers, chain of command thickness of paint layer is 0.017 ~ 0.024mm; For wet enamel insulated aluminium wire;
(3) cure: the wet enamel insulated aluminium wire of (2) step is placed in baker and cures, controlling toaster entrance temperature is 290 ~ 310 DEG C, and baker lower floor temperature is 340 ~ 370 DEG C, and baker central temperature is 450 ~ 460 DEG C, curing area temperature is 525 ~ 540 DEG C, is semi-finished product enamel insulated aluminium wire;
(4) the semi-finished product enamel insulated aluminium wire of (3) step is enamel insulated aluminium wire through cooling, lubrication, take-up, quality inspection, packaging.
3., according to the preparation method without freon compressing unit enamel insulated aluminium wire according to claim 1, it is characterized in that described is increase the polar group in paint matrix molecule to paint modification, described polar group is hydroxy-acid group.
4., according to the preparation method without freon compressing unit enamel insulated aluminium wire according to claim 1, it is characterized in that described to aluminium wire cleaning, adopt ultrasonic cleaning system to clean aluminium wire surface.
5. according to the preparation method without freon compressing unit enamel insulated aluminium wire according to claim 2, it is characterized in that the japanning of (2) step controls under-coating varnish layer thickness is 0.003 ~ 0.009mm, intermediate layer paint layer thickness is 0.062 ~ 0.074mm, top coat layer thickness is 0.018 ~ 0.025mm, and enamelled coating gross thickness is 0.082 ~ 0.107mm.
6., according to the preparation method without freon compressing unit enamel insulated aluminium wire according to claim 2, it is characterized in that (3) step cures the inlet temperature controlling baker is 300 DEG C, and baker central temperature is 450 DEG C, and baker outlet temperature is 510 DEG C.
7., according to the preparation method without freon compressing unit enamel insulated aluminium wire according to claim 2, control rotation speed of fan when it is characterized in that (3) step is cured: major cycle blower fan 2000 ~ 2500R/min; Lower fire door sucking-off blower fan 1300 ~ 1800R/min.
8. one kind without freon compressing unit enamel insulated aluminium wire preparing according to method according to claim 1.
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| CN107170528A (en) * | 2017-05-11 | 2017-09-15 | 苏州市新的电工有限公司 | A kind of detection method of polyester-imide enamel covered wire baking degree |
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