CN110310782B - Processing technology and device of special self-adhesive enameled wire for household motor - Google Patents
Processing technology and device of special self-adhesive enameled wire for household motor Download PDFInfo
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- CN110310782B CN110310782B CN201910627931.7A CN201910627931A CN110310782B CN 110310782 B CN110310782 B CN 110310782B CN 201910627931 A CN201910627931 A CN 201910627931A CN 110310782 B CN110310782 B CN 110310782B
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- 239000000853 adhesive Substances 0.000 title claims abstract description 52
- 238000005516 engineering process Methods 0.000 title claims abstract description 21
- 239000003973 paint Substances 0.000 claims abstract description 62
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 55
- 238000001035 drying Methods 0.000 claims abstract description 41
- 239000011248 coating agent Substances 0.000 claims abstract description 19
- 238000000576 coating method Methods 0.000 claims abstract description 19
- 238000000137 annealing Methods 0.000 claims abstract description 5
- 238000010438 heat treatment Methods 0.000 claims description 46
- 238000000034 method Methods 0.000 claims description 22
- 230000003197 catalytic effect Effects 0.000 claims description 20
- 239000002918 waste heat Substances 0.000 claims description 15
- 229910052802 copper Inorganic materials 0.000 claims description 11
- 239000010949 copper Substances 0.000 claims description 11
- 238000005485 electric heating Methods 0.000 claims description 9
- 230000007613 environmental effect Effects 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 5
- 229920003055 poly(ester-imide) Polymers 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 24
- 238000004804 winding Methods 0.000 abstract description 8
- 238000006555 catalytic reaction Methods 0.000 description 5
- 238000007598 dipping method Methods 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 238000007084 catalytic combustion reaction Methods 0.000 description 3
- 210000003298 dental enamel Anatomy 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000002904 solvent Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 230000037452 priming Effects 0.000 description 2
- 230000036760 body temperature Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000004534 enameling Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 239000013557 residual solvent Substances 0.000 description 1
- 238000010301 surface-oxidation reaction Methods 0.000 description 1
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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
-
- 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
-
- 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
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
-
- 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
- H01B13/30—Drying; Impregnating
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Drying Of Solid Materials (AREA)
- Coating Apparatus (AREA)
Abstract
The invention discloses a processing technology and a device of a special self-adhesive enameled wire for a household motor, which comprises the following steps: softening the bare copper wire by an annealing oven to obtain a copper wire A; feeding the copper wire A into a drying furnace for drying to obtain a copper wire B; coating primer on the surface of the copper wire B, sending the copper wire B into a first enamelling furnace, and drying the copper wire B for the first time in different temperature environments through the first enamelling furnace to obtain an enamelled wire C; coating finish paint on the surface of the enameled wire C, feeding the enameled wire C into a second enamelling furnace, and drying the enameled wire C for the second time in different temperature environments through the second enamelling furnace to obtain an enameled wire D; and D, winding the enameled wire to obtain a finished enameled wire. The invention can effectively improve the working stability and the bonding effect of the self-adhesive paint after coating.
Description
Technical Field
The invention relates to a processing technology and a processing device of an enameled wire, in particular to a processing technology and a processing device of a self-adhesive enameled wire special for a household motor.
Background
At present, after a winding of an enameled wire is formed into a motor, a paint dipping process is needed, and a space air gap between winding wires is filled up through paint dipping, so that the motor winding has good mechanical performance, chemical stability and service life. However, the paint dipping process inevitably discharges harmful gases such as styrene and the like in the processing process, so that the environmental protection effect is reduced. Therefore, with the development of the technology, the self-adhesive paint is used as the surface paint layer of the motor winding wire, and the self-adhesive paint can be mutually bonded under the working environment to generate the filling effect similar to the paint dipping process, so that the environmental pollution of the motor caused by the paint dipping process is effectively avoided, and the self-adhesive paint is more and more widely applied to the processing process of the motor enameled wire.
However, in the baking process of the paint layer on the surface of the enameled wire, the problem that the residual solvent in the paint film or the paint film cannot be completely cured due to the high and low furnace temperature is caused, so that the paint layer has the defects of low adhesion stability and poor adhesion effect after being coated, the self-adhesive paint cannot be completely bonded and molded with the adjacent enameled wire under the heating or solvent condition, and the physical and chemical properties of the enameled wire are improved compared with the traditional enameled wire after being dipped in the paint. The self-adhesive paint has high requirement on the external temperature environment during coating, and the traditional enameling machine baking oven needs to continuously catalyze airflow in the hot air circulation process so as to remove organic solvents and combustible substances in the airflow; the temperature of the circulating air flow after catalytic combustion is too high and difficult to control, and the cooling is realized by charging external air, so that the temperature deviation of the enameled wire oven during actual heating is caused, or the heating temperature fluctuates up and down, the adhesion effect on the self-adhesive paint is further reduced, and the insulation and adhesion effects of the self-adhesive paint after coating are influenced. Therefore, the existing self-adhesive enameled wire for the motor has the problems of low working stability and poor adhesion effect.
Disclosure of Invention
The invention aims to provide a processing technology of a self-adhesive enameled wire special for a household motor, which can effectively improve the working stability and the bonding effect of the self-adhesive enamel after coating; another aspect provides an apparatus for self-adhesive enameled wires, which can improve the coating effect of self-adhesive enamel.
The technical scheme of the invention is as follows: a processing technology of a self-adhesive enameled wire special for a household motor comprises the following steps:
softening a copper bare wire by an annealing oven, and wrapping water vapor outside the copper bare wire in the softening process to obtain an A copper wire;
secondly, the copper wire A is sent into a drying furnace to be dried, and a copper wire B is obtained;
thirdly, coating primer on the surface of the copper wire B, sending the copper wire B into a first enamelling furnace, and drying the copper wire B for the first time in different temperature environments through the first enamelling furnace, wherein the drying temperature is gradually increased along with the conveying direction of the copper wire B to obtain an enameled wire C;
fourthly, the surface of the enameled wire C is coated with finish paint and then is sent into a second enamelling furnace, the enameled wire C is dried for the second time in different temperature environments through the second enamelling furnace, and the drying temperature is gradually increased along with the conveying direction of the enameled wire C to obtain an enameled wire D;
and fifthly, winding the D enameled wire to obtain a finished enameled wire.
In the processing technology of the self-adhesive enameled wire special for the household motor, the primer in the third step is polyester paint or polyester imide paint, the first enamelling furnace heats the B copper wire in a first low-temperature region, a first medium-temperature region and a first high-temperature region along the conveying direction of the B copper wire in sequence, the temperature range of the first low-temperature region is 280-320 ℃, the temperature range of the first medium-temperature region is 450-480 ℃, and the temperature range of the first high-temperature region is 500-550 ℃.
In the processing technology of the self-adhesive enameled wire special for the household motor, the finish paint in the step IV is self-adhesive paint, the second enameled furnace sequentially heats the C enameled wire in a second low-temperature region and a second medium-temperature region along the conveying direction of the C enameled wire, the temperature range of the second low-temperature region is 300-340 ℃, and the temperature range of the second medium-temperature region is 350-400 ℃.
In the processing process of the self-adhesive enameled wire special for the household motor, in the step (iv), when the enameled wire C is dried for the second time, the specific heating temperatures of the second low-temperature region and the second medium-temperature region in the second enameled furnace are respectively detected by the temperature sensors, so that the transverse temperature difference in the second low-temperature region or the second medium-temperature region is not more than +/-5 ℃.
The device for the processing technology of the self-adhesive enameled wire special for the household motor comprises a softening oven, a drying oven, a first enamelling oven, a second enamelling oven and a wire-rewinding machine which are connected in sequence; the second enamelling furnace comprises a second heating furnace body, a second low-temperature area and a second medium-temperature area are sequentially arranged in the second heating furnace body along the conveying direction, second electric heating tubes are respectively arranged at the bottoms of the second low-temperature area and the second medium-temperature area, the tops of the second low-temperature area and the second medium-temperature area are respectively connected with a hot air inlet pipe and a first hot air outlet pipe, the end part of the first hot air outlet pipe is connected with a waste heat air pipe, a second environment-friendly catalytic device and a heat exchange pipe are sequentially arranged in the waste heat air pipe along the conveying direction, and the end part of the waste heat air pipe is connected with; one end of the heat exchange tube is connected with an air inlet fan, and the other end of the heat exchange tube is connected with a hot air inlet tube.
In the device, a second hot air outlet pipe is arranged at the top of the second heating furnace body between the second low-temperature region and the second medium-temperature region, and the end part of the second hot air outlet pipe is connected with one end of the waste heat air pipe close to the first hot air outlet pipe.
In the device, a plurality of second temperature sensors are arranged in the second low-temperature area and the second medium-temperature area, the second temperature sensors are perpendicular to the conveying direction of the second enamelling furnace and are arranged in the second heating furnace body side by side, and the distance between every two adjacent second temperature sensors is 100-500 mm.
In the device, the first enamelling furnace comprises a first heating furnace body, a first low-temperature area, a first medium-temperature area and a first high-temperature area are sequentially arranged in the first heating furnace body along the conveying direction, the bottoms of the first low-temperature area 301, the first medium-temperature area 302 and the first high-temperature area 303 are respectively provided with a first electric heating tube, the top of the first heating furnace body is provided with a circulating air pipe, two ends of the circulating air pipe are respectively connected with the first low-temperature area and the first high-temperature area, the middle part of the circulating air pipe is provided with an air return pipeline connected with the first medium-temperature area, one side of the circulating air pipe, which is close to the first high-temperature area, is provided with an outlet supplementary fan, and the middle part; an inlet air pipe connected with the first low-temperature zone is arranged on the outer side of the circulating air pipe, and the end part of the inlet air pipe is connected with an inlet supplementary fan; the top of the first low-temperature area is connected with an air outlet pipeline, and the upper end of the air outlet pipeline sequentially penetrates through a circulating air pipe and an inlet air pipe to be connected with a first environment-friendly catalytic device and a first waste discharge fan.
In the device, the inlet air pipe is provided with the drying branch pipe, and the end part of the drying branch pipe is connected with the drying furnace.
In the foregoing device, the first low-temperature zone, the first intermediate-temperature zone and the first high-temperature zone are all provided with first temperature sensors.
Compared with the prior art, the temperature difference between the primer and the finish paint during heating and baking is set, so that the drying temperature of the paint layer can be effectively reduced when the paint layer enters a furnace body, and the problem that the solvent in the paint layer is not completely evaporated and the paint film is solidified due to overhigh furnace temperature, so that the solvent residue exists in the paint film is avoided; after the temperature in the furnace body gradually rises along with the conveying direction of the enameled wire, the curing effect on a paint film can be ensured, so that the primer and the finish paint have good process stability and coating effect during coating; by accurately controlling the baking temperature of the self-adhesive paint, the reduction of the baking effect of the self-adhesive paint caused by the fluctuation of the drying temperature can be effectively avoided aiming at the characteristics of the self-adhesive paint, so that the stability of the self-adhesive paint after coating is further improved; the invention further optimizes the corresponding baking temperature aiming at the specific paint types of the priming paint and the finishing paint, so that the phenomenon of peeling or incomplete mutual adhesion of the self-adhesive paint on the surface of the enameled wire can be reduced when the self-adhesive paint is used; through to copper line surface filling vapor when annealing is softened, can avoid the oxidation of being heated on copper line surface, avoid softening the influence to copper line physical properties, through to the drying process of copper line after softening, then can dry at the vapor on copper line surface to the adhesion after the cooling condenses to further improve the stability and the performance effect of priming paint and finish paint after the coating.
The processing technology is also provided with a corresponding processing device, and hot air at a specified temperature can be kept to continuously flow and bake the self-adhesive finish on the surface of the enameled wire through the hot air inlet pipe, the first hot air outlet pipe and the second hot air outlet pipe in the second heating furnace body, so that the baking efficiency of the self-adhesive finish is improved; the method has the advantages that the inlet air and the outlet air can be separated from each other by exchanging heat of the air filled in the second heating furnace body through the heat exchange tube by the gas after environmental protection catalysis, so that the phenomenon that the furnace body temperature is floated or difficult to control due to the fact that the high-temperature airflow after catalysis enters the second heating furnace body again is effectively avoided, and the control precision of the method for controlling the furnace temperature is improved; external air enters the furnace body after heat exchange, so that the heat energy of the catalyzed waste gas can be utilized, and the energy consumption for heating the air is reduced; the plurality of second temperature sensors are arranged in the second heating furnace body side by side, so that the detection accuracy of the furnace temperature can be improved, the heating temperature difference between different enameled wires at the same conveying position is avoided, the temperature range around each enameled wire can be stabilized within +/-5 ℃, and the coating effect of the second low-temperature area and the second medium-temperature area on the self-adhesive finish paint is ensured.
In addition, because the furnace temperature precision requirement of the polyester or polyester imide primer during coating is lower than that of the self-adhesive finish, the high-temperature airflow can continuously flow in the circulating air pipe to bake the enameled wire through the matching of the circulating air pipe, the inlet air pipe and the return air pipeline; the external cold air can be charged into the first heating furnace body from two sides through the outlet supplementary fan and the inlet supplementary fan, so that the continuous rise of the catalytic temperature in the furnace body is avoided; part of high-temperature airflow after baking can be discharged to the outside from the air outlet pipeline, so that the temperature in the first heating furnace body is further reduced, and the temperature control effect is realized; according to the invention, through the structural matching of the air outlet pipeline, the circulating air pipe and the inlet air pipe, high-temperature air flow in the furnace body can exchange heat with air in the circulating process and at the inlet air pipe respectively when being discharged, so that the heat energy in waste gas is utilized, and simultaneously, hot air in the circulating process can be heated before entering the oven catalytic device, thereby improving the catalytic combustion effect of the oven catalytic device on the air flow; the air flow at the inlet air pipe can also dry the drying furnace after being heated, thereby effectively avoiding the drying structure required by the drying furnace and further reducing the energy consumption of the invention. Therefore, the invention can effectively improve the working stability and the bonding effect of the self-adhesive paint after coating and improve the coating effect of the self-adhesive paint.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the second enamelling furnace;
FIG. 3 is a schematic view of the first enamelling furnace.
The labels in the figures are: 1-softening oven, 2-drying oven, 3-first enamelling oven, 4-second enamelling oven, 5-take-up machine, 6-hot air inlet pipe, 7-first hot air outlet pipe, 8-waste heat air pipe, 9-second environmental protection catalytic device, 10-heat exchange pipe, 11-second exhaust air fan, 12-air inlet fan, 13-second hot air outlet pipe, 14-circulating air pipe, 15-return air pipe, 16-outlet supplementary fan, 17-oven catalytic device, 18-inlet air pipe, 19-inlet supplementary fan, 20-air outlet pipe, 21-first environmental protection catalytic device, 22-first exhaust air fan, 23-drying branch pipe, 301-first low temperature zone, 302-first middle temperature zone, 303-first high temperature zone, 401-a second low temperature zone, 402-a second intermediate temperature zone, 403-a second electrical heating tube.
Detailed Description
The invention is further illustrated by the following figures and examples, which are not to be construed as limiting the invention.
Examples are given. A processing technology of a self-adhesive enameled wire special for a household motor is shown in figure 1 and comprises the following steps:
softening a copper bare wire by an annealing oven, and wrapping water vapor outside the copper bare wire in the softening process to obtain an A copper wire;
secondly, the copper wire A is sent into a drying furnace to be dried, and a copper wire B is obtained;
thirdly, coating primer on the surface of the copper wire B, sending the copper wire B into a first enamelling furnace, and drying the copper wire B for the first time in different temperature environments through the first enamelling furnace, wherein the drying temperature is gradually increased along with the conveying direction of the copper wire B to obtain an enameled wire C;
fourthly, the surface of the enameled wire C is coated with finish paint and then is sent into a second enamelling furnace, the enameled wire C is dried for the second time in different temperature environments through the second enamelling furnace, and the drying temperature is gradually increased along with the conveying direction of the enameled wire C to obtain an enameled wire D;
and fifthly, winding the D enameled wire to obtain a finished enameled wire.
The primer in the third step is polyester paint or polyester imide paint, the first enamelling furnace heats the B copper wire in a first low-temperature area, a first medium-temperature area and a first high-temperature area along the conveying direction of the B copper wire in sequence, the temperature range of the first low-temperature area is 300 ℃, the temperature range of the first medium-temperature area is 480 ℃, and the temperature range of the first high-temperature area is 520 ℃.
The finish paint in the fourth step is self-adhesive paint, the self-adhesive paint can be polyester resin/epoxy resin composite self-adhesive wire enamel, the second enamelling furnace heats the C enamelled wire in a second low-temperature area and a second medium-temperature area in sequence along the conveying direction of the C enamelled wire, the temperature range of the second low-temperature area is 320 ℃, and the temperature range of the second medium-temperature area is 360 ℃.
And in the fourth step, when the enameled wire C is dried for the second time, the specific heating temperatures of the second low-temperature region and the second medium-temperature region in the second enameled furnace are respectively detected through the temperature sensors, so that the transverse temperature difference (namely the temperature difference in the furnace horizontally vertical to the enameled wire conveying direction in the second enameled furnace) in the second low-temperature region or the second medium-temperature region is not more than +/-5 ℃.
The device for the processing technology of the self-adhesive enameled wire special for the household motor comprises the following steps: comprises a softening oven 1, a drying oven 2, a first enamelling oven 3, a second enamelling oven 4 and a wire-rewinding machine 5 which are connected in sequence; the second enamelled furnace 4 comprises a second heating furnace body, a second low-temperature zone 401 and a second medium-temperature zone 402 are sequentially arranged in the second heating furnace body along the conveying direction, second electric heating tubes 403 are respectively arranged at the bottoms of the second low-temperature zone 401 and the second medium-temperature zone 402, the positions of the second electric heating tubes 403 correspond to the enamelled wires and are arranged at the bottom of the second heating furnace body side by side, the tops of the second low-temperature zone 401 and the second medium-temperature zone 402 are respectively connected with a hot air inlet pipe 6 and a first hot air outlet pipe 7, the end part of the first hot air outlet pipe 7 is connected with a waste heat air pipe 8, a second environmental protection catalytic device 9 and a heat exchange pipe 10 are sequentially arranged in the waste heat air pipe 8 along the conveying direction, and the end part of; the heat exchange tubes 10 are distributed in the waste heat air pipe 8 in an S shape, one end of each heat exchange tube 10 is connected with an air inlet fan 12, and the other end of each heat exchange tube 10 is connected with a hot air inlet pipe 6.
A second hot air outlet pipe 13 is arranged at the top of the second heating furnace body between the second low-temperature region 401 and the second medium-temperature region 402, the end part of the second hot air outlet pipe 13 is connected with one end of a waste heat air pipe 8 close to the first hot air outlet pipe 7, and the second hot air outlet pipe 13 and the first hot air outlet pipe 7 are arranged side by side.
A plurality of second temperature sensors are arranged in the second low-temperature area 401 and the second medium-temperature area 402, the second temperature sensors are perpendicular to the conveying direction of the second enamelling furnace 4 and are arranged in the second heating furnace body side by side, and the distance between every two adjacent second temperature sensors is 300 mm.
The first enamelled furnace 3 comprises a first heating furnace body, a first low-temperature area 301, a first medium-temperature area 302 and a first high-temperature area 303 are sequentially arranged in the first heating furnace body along the conveying direction, first electric heating tubes are arranged at the bottoms of the first low-temperature area 301, the first medium-temperature area 302 and the first high-temperature area 303, a circulating air pipe 14 is arranged at the top of the first heating furnace body, two ends of the circulating air pipe 14 are respectively connected with the first low-temperature area 301 and the first high-temperature area 303, an air return pipeline 15 connected with the first medium-temperature area 302 is arranged in the middle of the circulating air pipe 14, an outlet supplementary fan 16 is arranged on one side of the circulating air pipe 14 close to the first high-temperature area 303, an oven catalytic device 17 is arranged in the middle of the circulating air pipe 14, and the oven catalytic device 17 is positioned on one side of the air return pipeline; an inlet air pipe 18 connected with the first low-temperature zone 301 is arranged on the outer side of the circulating air pipe 14, and the end part of the inlet air pipe 18 is connected with an inlet supplementary fan 19; the top of the first low-temperature zone 301 is connected with an air outlet pipeline 20, the upper end of the air outlet pipeline 20 sequentially penetrates through the circulating air pipe 14 and the inlet air pipe 18 to be connected with a first environment-friendly catalytic device 21 and a first waste air exhaust fan 22, and the air outlet pipeline 20 penetrates through the circulating air pipe 14 in an S shape.
And a drying branch pipe 23 is arranged on the inlet air pipe 18, and the end part of the drying branch pipe 23 is connected with the drying furnace 2.
First temperature sensors are arranged in the first low-temperature area 301, the first medium-temperature area 302 and the first high-temperature area 303, and a catalysis temperature sensor is arranged on one side of the oven catalysis device 17.
The working principle of the invention is as follows: the drawn bare copper wire is subjected to de-ignition softening through a softening oven 1, so that the mechanical property of the bare copper wire is improved; the bare copper wire is wrapped by water vapor in the softening process, so that the surface oxidation of the copper wire during the fire removing process can be avoided, and the fire removing effect of the copper wire is further improved. The softened copper wire is dried by the drying furnace 2, so that the water vapor condensed on the surface of the copper wire due to cooling can be completely evaporated, and the subsequent painting effect of the paint on the copper wire is improved.
After the dried copper wire enters the first enamelling furnace 3, the copper wire is coated with primer through the first enamelling furnace 3 and then sent into the first heating furnace body for baking, so that the primer is completely cured after being baked. In the baking process of the enameled wire, the first electric heating tube is matched with high-temperature air flow in the circulating air tube 14 to bake the enameled wire, so that the curing effect of the primer is improved. The high-temperature airflow rotates counterclockwise during baking, enters the first heating furnace body from the circulating air pipe 14 at the first high-temperature region 303, returns to the circulating air pipe 14 from the other end after baking is finished, and is subjected to catalytic combustion through the baking furnace catalytic device 17, so that one period of baking is finished. External air can be respectively filled into the first heating furnace body from two ends through the outlet supplementary fan 16 and the inlet supplementary fan 19 on two sides, so that the temperature control in the furnace body is realized, and the temperature rise in the furnace body caused by high temperature of the catalyzed airflow is avoided; the high-temperature air flow in the circulation process can be discharged to the outside through the air outlet pipeline 20, and the temperature control effect is further improved. Since the air flow entering the circulating air duct 14 from the first low temperature zone 301 needs to be mixed with the fresh air charged by the supplementary blower 19, the temperature of the air flow at this position is lower than that of the high temperature air flow discharged from the air outlet duct 20; therefore, when the air flow in the air outlet pipeline 20 is discharged, the air in the circulating air pipe 14 and the air in the inlet air pipe 18 can be subjected to heat exchange, so that the mixed gas entering the circulating air pipe 14 from the end part can be heated before entering the oven catalytic device 17, and the catalytic effect of the oven catalytic device 17 is improved. The air at the inlet air duct 18 can be conveyed to the drying furnace 2 for drying after heat exchange, thereby improving the utilization rate of heat energy and avoiding the energy consumption required by the drying furnace 2.
The enameled wire is baked by the first heating furnace body, enters the second enamelling furnace 4, is coated with self-adhesive finish, and is baked for the second time by the second heating furnace body. Due to the fact that the temperature requirement of the self-adhesive finish paint is high during baking, the temperature in a furnace body is fluctuated and difficult to control due to a conventional hot air circulation structure, and the baking effect of the self-adhesive finish paint is reduced. Therefore, the invention ensures that the baked waste gas can respectively enter the waste heat air pipe 8 through the first hot air outlet pipe 7 and the second hot air outlet pipe 13 and be catalyzed through the second environment-friendly catalytic device 9 by the cooperation of the hot air inlet pipe 6, the first hot air outlet pipe 7, the second hot air outlet pipe 13, the waste heat air pipe 8 and the heat exchange pipe 10; the high-temperature waste gas after catalysis is discharged to the outside after heat exchange through the heat exchange tube 10, and the fresh air heated by the air inlet fan 12 through the heat exchange tube 10 is sent into the furnace body for baking, so that the airflow at the hot air inlet tube 6 can keep a stable baking temperature, and the external air is not required to be directly filled for cooling in the baking process, so that the furnace temperature in the second heating furnace body can be kept stable constantly, and the coating effect of the self-adhesive finish paint is improved. When the second heating furnace body is used for baking, the baking temperatures of different transverse positions in the second low-temperature area 401 and the second middle-temperature area 402 can be respectively detected through the second temperature sensors which are arranged side by side, once the actual temperature of a certain position deviates from the designated temperature, an operator can finely adjust the overall temperature of the second low-temperature area 401 or the second middle-temperature area 402 by adjusting the heating temperature of the second electric heating pipe 403, and the temperature of each position in the area can reach the range of +/-5 ℃. And the baked enameled wire is wound through a winding machine 5, and the enameled wire is processed.
Claims (6)
1. A processing technology of a self-adhesive enameled wire special for a household motor is characterized by comprising the following steps:
softening a copper bare wire by an annealing oven, and wrapping water vapor outside the copper bare wire in the softening process to obtain an A copper wire;
secondly, the copper wire A is sent into a drying furnace to be dried, and a copper wire B is obtained;
thirdly, coating primer on the surface of the copper wire B, sending the copper wire B into a first enamelling furnace, and drying the copper wire B for the first time in different temperature environments through the first enamelling furnace, wherein the drying temperature is gradually increased along with the conveying direction of the copper wire B to obtain an enameled wire C;
fourthly, the surface of the enameled wire C is coated with finish paint and then is sent into a second enamelling furnace, the enameled wire C is dried for the second time in different temperature environments through the second enamelling furnace, and the drying temperature is gradually increased along with the conveying direction of the enameled wire C to obtain an enameled wire D;
rolling the D enameled wire to obtain a finished enameled wire;
the primer in the third step is polyester paint or polyester imide paint, the first enamelling furnace heats the copper wire B in a first low-temperature area, a first intermediate-temperature area and a first high-temperature area along the conveying direction of the copper wire B in sequence, the temperature range of the first low-temperature area is 280-320 ℃, the temperature range of the first intermediate-temperature area is 450-480 ℃, and the temperature range of the first high-temperature area is 500-550 ℃;
the finish paint in the fourth step is self-adhesive paint, the second enamelling furnace sequentially heats the C enamelled wire in a second low-temperature area and a second medium-temperature area along the conveying direction of the C enamelled wire, the temperature range of the second low-temperature area is 300-340 ℃, and the temperature range of the second medium-temperature area is 350-400 ℃;
the device for the processing technology of the self-adhesive enameled wire special for the household motor comprises a softening oven (1), a drying oven (2), a first enamelling oven (3), a second enamelling oven (4) and a wire-rewinding machine (5) which are connected in sequence; the second enamelling furnace (4) comprises a second heating furnace body, a second low-temperature area (401) and a second medium-temperature area (402) are sequentially arranged in the second heating furnace body along the conveying direction, second electric heating tubes (403) are respectively arranged at the bottoms of the second low-temperature area (401) and the second medium-temperature area (402), the tops of the second low-temperature area (401) and the second medium-temperature area (402) are respectively connected with a hot air inlet pipe (6) and a first hot air outlet pipe (7), the end part of the first hot air outlet pipe (7) is connected with a waste heat air pipe (8), a second environmental protection catalytic device (9) and a heat exchange pipe (10) are sequentially arranged in the waste heat air pipe (8) along the conveying direction, and the end part of the waste heat air pipe (8) is connected with a; one end of the heat exchange tube (10) is connected with an air inlet fan (12), and the other end of the heat exchange tube (10) is connected with a hot air inlet tube (6);
the first enamelled furnace (3) comprises a first heating furnace body, a first low-temperature area (301), a first medium-temperature area (302) and a first high-temperature area (303) are sequentially arranged in the first heating furnace body along the conveying direction, first electric heating tubes are arranged at the bottoms of the first low-temperature area (301), the first medium-temperature area (302) and the first high-temperature area (303), a circulating air pipe (14) is arranged at the top of the first heating furnace body, two ends of the circulating air pipe (14) are respectively connected with the first low-temperature area (301) and the first high-temperature area (303), a return air pipeline (15) connected with the first medium-temperature area (302) is arranged in the middle of the circulating air pipe (14), an outlet supplementary fan (16) is arranged on one side, close to the first high-temperature area (303), of the circulating air pipe (14), and a furnace drying catalytic device (17) is arranged in the middle; an inlet air pipe (18) connected with the first low-temperature zone (301) is arranged on the outer side of the circulating air pipe (14), and an inlet supplementary fan (19) is connected to the end part of the inlet air pipe (18); the top of the first low-temperature zone (301) is connected with an air outlet pipeline (20), and the upper end of the air outlet pipeline (20) sequentially penetrates through a circulating air pipe (14) and an inlet air pipe (18) and is connected with a first environment-friendly catalytic device (21) and a first waste discharge fan (22).
2. The processing technology of the self-adhesive enameled wire special for the household motor as claimed in claim 1, is characterized in that: and in the fourth step, when the enameled wire C is dried for the second time, the specific heating temperatures of the second low-temperature region and the second medium-temperature region in the second enameled furnace are respectively detected through the temperature sensors, so that the transverse temperature difference in the second low-temperature region or the second medium-temperature region is not more than +/-5 ℃.
3. The processing technology of the self-adhesive enameled wire special for the household motor as claimed in claim 1, is characterized in that: and a second hot air outlet pipe (13) is arranged at the top of the second heating furnace body between the second low-temperature region (401) and the second medium-temperature region (402), and the end part of the second hot air outlet pipe (13) is connected with one end of a waste heat air pipe (8) close to the first hot air outlet pipe (7).
4. The processing technology of the self-adhesive enameled wire special for the household motor as claimed in claim 1, is characterized in that: all be equipped with a plurality of second temperature sensor in second low temperature district (401) and second intermediate temperature district (402), a plurality of second temperature sensor perpendicular to second enamelling stove (4) direction of delivery set up side by side in the second heating furnace body, and the interval between the adjacent second temperature sensor is 100 ~ 500 mm.
5. The processing technology of the self-adhesive enameled wire special for the household motor as claimed in claim 1, is characterized in that: and a drying branch pipe (23) is arranged on the inlet air pipe (18), and the end part of the drying branch pipe (23) is connected with the drying furnace (2).
6. The processing technology of the self-adhesive enameled wire special for the household motor as claimed in claim 1, is characterized in that: first temperature sensors are arranged in the first low-temperature region (301), the first medium-temperature region (302) and the first high-temperature region (303).
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| CN111446044B (en) * | 2020-04-14 | 2021-12-14 | 中天智能装备有限公司 | Production process of UV aluminum wire enameled wire |
| CN114268202B (en) * | 2021-12-28 | 2023-01-24 | 先登高科电气股份有限公司 | Painting process and painting device for hairpin-type enameled wire for flat wire motor |
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| JP3033630B2 (en) * | 1992-02-17 | 2000-04-17 | 古河電気工業株式会社 | Enamel wire baking furnace |
| CN201269533Y (en) * | 2008-09-12 | 2009-07-08 | 湖州郎立电工器材制造有限公司 | Oven for lacquered wire |
| CN203552813U (en) * | 2013-09-26 | 2014-04-16 | 露笑科技股份有限公司 | Double-oven enamelling machine |
| CN104240804B (en) * | 2014-09-30 | 2016-08-31 | 无锡统力电工股份有限公司 | A kind of transformator heat resistance self-adhesive transposed conductor and preparation method thereof |
| CN205808141U (en) * | 2016-07-06 | 2016-12-14 | 湖南汇鑫铜业有限公司 | A kind of control the device that enamel-cover in-furnace temperature is stable |
| CN106992044B (en) * | 2017-04-17 | 2019-04-02 | 格力电工（马鞍山）有限公司 | Baking method of enameled wire |
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Denomination of invention: Processing technology and device of self adhesive enameled wire for household motor Effective date of registration: 20210630 Granted publication date: 20210122 Pledgee: Zhejiang Nanxun Rural Commercial Bank branch Shuanglin Limited by Share Ltd. Pledgor: ZHEJIANG LANGLI ELECTRIC EQUIPMENT Co.,Ltd. Registration number: Y2021330000736 |
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Granted publication date: 20210122 Pledgee: Zhejiang Nanxun Rural Commercial Bank branch Shuanglin Limited by Share Ltd. Pledgor: ZHEJIANG LANGLI ELECTRIC EQUIPMENT CO.,LTD. Registration number: Y2021330000736 |