Method for manufacturing of enamelled wires

FIELD: electricity.

SUBSTANCE: on the basis of a film-generating varnish PE-933 of grade B an electrophoretic composition is created, which comprises the following components, ml/l: varnish PE-939 of grade B - (290÷300); 1% - liquid ammonia 1 % - NH4OH - (110÷120); dioxane (C4H8O2) - balance. Previously a certain value of current density is selected, a section of a moving wire is submerged into the specified electrophoretic composition, the wire is stopped, positive potential is supplied to it relative to a grounded body of a unit of enamel insulation application, and its value provides for a certain value of anophoresis current, an enamel insulation film is deposited onto a wire section submerged into the electrophoretic composition for a time determined in accordance with the given ratio, then the wire is moved again, the wire is again stopped, the enamel insulation film is electrically deposited onto the subsequent section of wire, such alternating process is continued until completion of the enamelling process.

EFFECT: power input reduction.

1 dwg

 

The invention relates to the cable industry, in particular the production of enamelled wires.

A known method of manufacturing enameled wires immersion. The method consists in the fact that in a bath of lacquer dipped guide rollers and the wire from the captured while moving varnish comes in amlici [1].

The lack of production of enamelled wires immersion is that it is applicable only for low-viscosity oil varnishes, which have a high content of film-forming and significantly changing the viscosity in the process of enameling.

The closest technical solution to the claimed is the method which consists in applying heat to the wire, multiple applications on a wire film-forming substance with the subsequent supply of heat to the wire coated with a film-forming substance for his termsapache, and heat to the wire down enough for gelatinization film-forming substance, and the subsequent application of heat is performed after application of each layer [2].

The disadvantage of the prototype method is that the film time analizowanie on the wire is applied in layers over multiple passes of the wire through the gauges. After each pass film time analizowanie utverjdayut by exposing it to heat energy to the energy. This leads to unnecessarily high energy costs.

Enameling wire in standard units tend to perform at a certain constant speed, which in the literature is called admissible speed of enamelling. This constant permissible speed enamelling VSSin each case calculated based on the time of film formation, the thickness of the time analizowanie, properties emalirovochnaya varnish and height of the furnace. However, to ensure the constancy of the speed of the wire is not always possible.

Under the influence of random factors (instability voltage electrical network, due to operator error, etc.) the speed of the wire may vary within certain limits. In the result, violated the conditions of application of enamel on the wire surface, its thickness and the time of heat during gelatinization film-forming substance that affects as analizowanie.

Thus, the prototype method does not allow to get even with optimal combinations of modes enameling high quality enamel insulation and is characterized by elevated energy consumption.

The aim of the invention is to improve the quality of the wires and the reduction of energy consumption.

This objective is achieved in that in the method of manufacturing enameled wires on wires is put analizowaniu with further supply of heat to the wire with a deposited egalitaria, moreover, the coating time analizowanie carried out by electrodeposition using an electrophoretic composition comprising the following components, ml/l:

Lac PE-939 marks - (290÷300),

1% - ammonia 1% - NH4OH - (110÷120),

dioxane (C4H8O2) - the rest,

while pre-select the value of the current density j, which lies in the range of current densities of anafarta (2÷10) mA/cm2immerse the plot moving wire of length L in the above-mentioned electrophoretic composition, stop wire, serves on it relative to a grounded casing of the application unit time analizowanie positive potential, the value of which provides the current value of anafarta J equal to J=πDLj, where D is the wire diameter, in m, and for a given current J is then precipitated onto immersed in the electrophoretic composition of a section of wire film time analizowanie during the time t, determined by the expression,

where ρ is the density of the enamel, kg/m3, d is the thickness of time analizowanie, m, k is the output of dry residue current, kg/S×s, then after time t re-move the wire to a length equal to L, again stop the wire and when the above current values of J anafarta during the mentioned time t carry out the electrodeposition film time analizowanie on after the relevant section of wire of length L. This alternating process continues until the end of the process of enameling wire.

The invention consists in the following.

Electrodeposition as a method of obtaining coatings found industrial application around mid 60-ies. The rapid spread of this method is associated with a number of advantages, of which the most significant are:

a) high uniformity of coating thickness and its relative independence from the configuration and dimensions of the product;

b) higher corrosion resistance of the deposited films compared to films obtained in the traditional way;

C) high efficiency at high enough performance;

E. regulation of film thickness by changing the current density or potential;

e) the speed of growth of coatings;

g) the ability to process automation and holding it under normal conditions (room temperature and normal pressure).

Electrochemical polymeric coating is one of the modern directions of development of the paint technology.

The practical application of electrochemical polymeric coatings is hindered by insufficient knowledge of the processes of formation of a film on a substrate.

Method of application time analizowanie is with abuses. In a bath with an electrophoretic composition is immersed product that connects one pole of the DC source. Under the action of a constant electric field in a medium with a high dielectric constant is the transport of ions or ionized micelles of the foaming agent in the direction of the applied field (to the product). The deposition film-forming material begins to sharp edges and protrusions of the product, the charge density on which the most high. With increasing deposited layer is a redistribution of the field lines, and a film of uniform thickness covers all the product.

The output of the sludge depends on the duration of deposition and the amount of absorbed electricity and limited electric resistance of the resulting layer. By increasing the thickness of the coating it first increases linearly from the time of deposition, and then, upon reaching a certain critical film thickness, depending on the properties of the composition, there is a reduction of the current density and the decrease in the rate of deposition. Therefore, the electrodeposition can be seen as a self-regulating process with the values of the thickness and continuity of the coating.

Polyion in the film-forming composition must carry a charge opposite in sign to the charge of the product. In line with this, there are e extraacademia on the anode, or anodic deposition (anaphoras), and electrodeposition at the cathode, or cathode deposition (cateforis).

The main advantage of the electrophoretic enameling wire compared with the traditional methods of enamelling - the ability to overlay a uniform insulation of required thickness in one pass, including at the corners of the rectangular wires, without the use of gauges or any other regulatory devices, since the thickness of the applied coating is easily regulated by changing applied to the electrodes of the voltage and the speed of drawing the wire through the bath with the composition.

The main characteristics of electrophoretic systems are: scattering power, nominal output current, conductivity.

Under the scattering ability to understand the property of paint material to penetrate into hard to reach areas of the products and to form a uniform coating thickness. Scattering power depends on the mode of deposition and the composition of the material (film-forming, solvent, electrolyte, and others).

Conditional output current indicates the number of paint material is deposited on the surface of the product when applying a certain amount of electricity. This indicator is important for estimating energy consumption.

Specific conductance is the value for asiausa the ability of paint material to conduct electric current. It depends on the nature of film-forming, pH (acidity) and the temperature of the composition. Because the unified theory of electrophoresis is not, then the search for compounds with electrophoretic properties, and the development of modes of electrophoresis is carried out experimentally.

For wires brand PETV, appropriate insulation class F (155°C) or class H (180°C), use the most common in the domestic cable industry varnish insulating PE-939 THAT 16-504.026-74.

In the initial state lacquer PE-939 has no electrophoretic properties, and it is applied to the surface of the moving wire successive layers, passing a wire through the site enameling and calibers, the corresponding diameter. Each layer is applied enamel film is subjected to heat, in which the film utverjdayut.

Lac PE-939 produce three grades of a, B and C, which differ in viscosity, which is determined by the amount of film-forming in it. The most viscous is lacquer PE-939 mark C.

Identification of optimal component ratio of the electrophoretic composition was carried out experimentally using theory of experiment planning. It was found that the process of deposition time analizowanie can be implemented when the following relations components electrophor the political composition, ml/l:

Lac PE-939 marks - (290÷300);

1% - ammonia 1% - NH4OH - (110÷120);

dioxane (C4H8O2) - else.

Electrophoretic deposition film-forming occurs when all of these components. The output concentrations of the components of the electrophoretic composition for these ranges leads to a decrease of quality indicators time analizowanie (uniformity of film, electrical and mechanical strength, and others).

At the specified mixing ratio of the electrophoretic composition of the magnitude of the resulting thickness of the electrophoretic film depends on the current density electrophoresis and time of the deposition. It was found that high-quality films are obtained in the range of current density of 2 mA/cm2up to 10 mA/cm2. When the current density with a value of less than 2 mA/cm2the film becomes loose and as analizowanie deteriorating. The increase in the current densities of 10 mA/cm2leads to increased dissolution of the material of the wire, to defect formation in the deposited film, which also degrades as analizowanie.

The timing of deposition of the film-forming depends on the speed of enamelling. Enameling wire in standard units tend to perform at a certain constant speed Vappr .

However, to ensure the constancy of the speed of movement of the wire when the enameling is not always possible. Therefore, the actual speed of the pulling wire V in the process of enamelling is not equal to the permissible speed enamelling VSSand changes with enameling in a range of values around the value of VSSthat affects the quality time analizowanie. In order to prevent negative impact on the quality of time analizowanie oscillation speed of the wire is observed in the process of enamelling, in the proposed method, the film time analizowanie put on the fixed wire. A portion of the wire length L is immersed in the electrophoretic composition, stop her at the time t needed for the application it required thickness time analizowanie. The moment you stop wire it serves a positive potential from a stabilized power source, calculated on the value of J=πDLj, and at the specified current anafarta after stopping the wire within the above specified time t on the surface of the immersed section of the wire of length L carry out the electrodeposition time analizowanie. Upon completion of the deposition process during the time t the constant current source is turned off. Then move the wire to the length L. This move allows you to remove from the site of application of em is time lethalazie section of wire with already applied enamel film and enter the next segment of wire of the same length L in the electrophoretic composition. Wire again stopped at time t. After stopping the wire is again connected to the wire the positive potential from the DC constant current, and when the current J within the specified time t to a new, immersed in the electrophoretic composition of a section of wire of length L produce the electrodeposition film time analizowanie. This process periodically stop wire, deposition of the film on the submerged section of the wire and feed the wire at a given value of L is carried out for the entire process of enameling. Consider the process of applying time analizowanie in more detail.

The mass m of film-forming substance deposited on the metal base, is directly proportional passing through the electrophoretic composition of the charge q:.

In turnwhere k is the output of a dry film-forming residue current, kg/S×s, the current electrophoresis J, A; t - time of electrophoresis, C.

Substituting in the formula (1) expression (2) we get:.

Express the current J through the product of current density j on square's part of the wire surface, immersed in the electrophoretic composition:

where S is the surface area of the wire length L, m2; L is the length immersed in the electrophoretic composition of the Uch is SCCA wire, m; r is the wire radius, m; D=2r is the diameter of the wire.

On the other hand, the mass m of the enamel film on the part of the wire length L can be determined by the formula:where ρ is the density of the enamel, kg/m3; d is the thickness of the enamel insulation, M.

As the wire diameter D is much less than the thickness of the enamel d(D<<d), then the expression (5) can be simplified and write.

Equating the right hand sides of the expressions (4) and (6) to each other, and converting the resulting expression with respect to time of electrophoresis t, we get:

In the proposed method it is necessary to pre-set modes of application time analizowanie on the wire. For setting anafarta wire stretch through electrophoretic composition filled in the application unit time analizowanie, the length of which is equal to L. the part of the wire immersed in the electrophoretic composition equal to the length of the application unit time analizowanie L. As mentioned above, anaphoras in the specified electrophoretic composition can be carried out only in a certain range of current densities. Since the current density is difficult to directly measure, because it is an indirect value, the process of setting up anafarta the specified mode is done according to current anafarta. This setting is carried out as follows. In d is permissible for anafarta range of current densities choose a particular value of the current density j. The choice of this specific current density is determined by pragmatic considerations: the size of the application unit time analizowanie, sizes amlici, modes of curing deposited film, etc. the Basic requirement when choosing a current density of anafarta j will lie in the fact that he would not leave the boundaries of acceptable values of current densities. After selecting the current density calculate the current anafarta J by the formula (4). After the section of wire of length L is immersed in the electrophoretic composition in the application unit time analizowanie, wire stop and it serves a positive potential from the output of the DC constant current. This potential change up until the current value of anafarta J, which is measured by the ammeter in the process of changing the potential on the wire, reaches the value equal to J=πDL, where D is the wire diameter, m; L is the length of the application unit time analizowanie, m; j is the current density anafarta lying in the range of acceptable values of the current density j anafarta (2÷10) mA/cm2. The deposition time t depends on the required thickness d of time analizowanie and the selected values of the current density of anafarta j in accordance with the formula (7). After deposition of the film time analizowanie wire stretch over the length L, and again stop wire. When stopped the wire to a new area FR is a size L, following the previous one, the current J over time t is then precipitated film time analizowanie given thickness d. Then all of the above procedure is repeated again until the process is complete enameling wire.

The proposed method can be implemented using the device for the manufacture of enameled wire, a block diagram is depicted in figure 1.

The device (1) contains the giver 1 and receiving 12 fixtures. Between them consecutively during advancement of the wire are: DC constant current 2, ammeter 3, normally open contact relay 4, the application unit time analizowanie the wire 5, container 6 with an electrophoretic composition, the node 7 of heat to a wire coated with a film-forming substance, the speed sensor 8, the counter length of the wire 9, time relay 10 and the motor 11.

The application unit time analizowanie 5 consists of a housing 13 made of electrically conductive material in the form of a hollow body. The ends of the housing 13 muted insulating caps 14. Position 15 is indicated electrophoretic composition, which from the tank 6 is supplied through the pipe 16 by means of lacquer pumps 17 in the application unit time analizowanie on the wire 5. In the cover 14 mounted metal inlet 18 and outlet 19 calibers. The diameter of the entrance 18-gauge equal to d is ametro D wire and the diameter of the output gauge 19 is equal to the sum of the wire diameter and twice the thickness of the uncured film time analizowanie D+2dW. Position 20-marked wire. Position 21 marked wire coated with emalaysia. Position 22 designated relay K1. Position 23 marked a magnetic starter KM. Position 24 marked toggle switch. Position 25 marked normally closed contact CT. Position 26 is indicated normally closed contact C relay 22. Position 27 marked the normally open relay contact, which is mounted in the meter length of line 9 (not shown). Position 28 designated contact KM1 magnetic contactor 23. Input DC regulated power 2 connected to the network. The output of the DC stabilized power 2 through the normally open contact 4 relay time and ammeter 3 positive pole connected to the wire 20, and the negative pole to the housing 13 of the application unit time analizowanie 5. Wire wrap time analizowanie enters the site heat 7, passes this node, and then delivered to the receiving device 12 consisting of a rotating coil, driven by a motor 11. The output wires from node 7 has a speed sensor 8, an input connected to the input of counter length of the wire 9. Abdoulaye input meter length of wire connected to the via normally closed contact 26 to the ground. The input of the time relay 22 through the normally open contact 27 connected to the power source 12 Century Phase And three-phase electric motor voltage through the normally closed contact 25 of the relay time and the switch 24 is connected to the magnetic actuator 23 and the relay 22. Magnetic contactor 23 and the relay 22 are connected in parallel. The connection point of the above chain to phase a is to open contact of the magnetic contactor 28 connecting a three-phase power to the motor after operation of the magnetic contactor 23.

The device operates as follows. In the initial state of the toggle switch 24 is open, the magnetic actuator 23 and the relay 22 is de-energized. The contact 26 is normally open, thereby counter the length of the wire 9 to zero. Contact 4 time relay 10 normally open and the second contact 25 of the relay normally closed. After turning on the toggle switch 24 and the magnetic switch 23 to the input of the motor through the contacts 28 of the magnetic actuator 23 is fed by three-phase voltage. The motor 11 starts to rotate the spool receiving device 12. The wire 20 with radiating device 1 enters the node application time analizowanie 5 through the inlet 18-gauge, where through the pipeline 16 with lacquer pump 17 is fed from the tank 6 electrophoretic composition 15.

The speed sensor 8 starts generi the SQL current pulses, the duration of each of which corresponds to the movement of the wire to some stable elementary length le. The current pulses enter the counter length of the wire 9, where is their expense. After the wire is moved to a predetermined length L, that is received from the speed sensor 8 in the counter length of the wire 9 to the number n of pulses equal to,

the counter 9 is triggered installed it the relay and closes the contact 27. The input of the time relay 10 through the closed contact 27 receives a voltage of 12 V, and the time relay 10 is activated. When the alarm time relay 10 opens normally closed contact 25 and closes normally open contact 4. Normally closed contact 25 of the relay opens and closes the supply circuit of the relay 22 and magnetic contactor 23. Disabling relay 22 normally closed contact 26 is opened, the counter length of the wire is reset and prepared for the new account. The gap of the magnetic circuit of the actuator 23 causes breaking of the contacts 28. The motor 11 is de-energized and stops, which leads to the suspension wire. Simultaneously with the stopping of the motor, since the normally open contact 4 is closed, the positive pole of the DC stabilized power 2 through the ammeter 3 connection is to be to the wire 20. The current value of J is calculated according to expression (4). Since the DC stabilized power 2 is connected with the positive pole to the wire 20, and the negative to the chassis 13 of the application unit time analizowanie 5, the wire 20 starts uniformizable deposition film-forming of the electrophoretic composition 15 filled in the application unit time analizowanie 5. Since the wire 20 filed the positive potential from the DC stabilized power 2, and the casing 13 of the application unit time analizowanie 5 - negative potential, the wire 20 must be isolated from the housing 13. This role is played by the cover 14, which is, in fact, bushing insulators from the air in the electrophoretic composition. The cover 14 is mounted inlet 18 and outlet 19 calibers. Their main purpose is the prevention of leakage electrophoretic composition from node 5 drawing time analizowanie. Therefore, the hole diameter of the input 18-gauge corresponds to the diameter D of the wire 20, and the diameter of the output gauge 19 is equal to the sum of the wire diameter and double the thickness of the uncured film time analizowanie D+2dW. Despite the fact that in the process of anafarta film forming lays evenly on the entire wire, however, when the output wire from the application unit 5 film-forming can produce some smudges. Why is the output gauge 19 serves to remove excess primers and additional equalization applied to the wire electrophoretic film. As applied in the process of anafarta the wire dry residue contains a film-forming amount of solvent and not baked, the thickness of the colloidal film of enamel dW(8÷15)% of the thickness d utverzhdenii film time analizowanie. Take this into account when making holes in the output gauge 19.

Time relay 10 is configured to time t electrophoresis, determined from the expression (7). After soaking in the course of time t time relay 10 is activated by breaking the contact 4 and the locking pin 25. As a result of this operation time relay 10 positive pole of the DC stabilized power is disconnected from the wire 20 and the electrophoresis is stopped. Simultaneously actuates the relay 22 and the normally closed contact 26 is closed, allowing the implementation of the account of the incident pulses in the counter length of the wire 9 from the output of the speed sensor 8.

After closure normally closed contact 25 is activated magnetic actuator 23 and the contact 29 is connected to the input of the motor 11 three-phase voltage. The motor 11 starts to rotate the coil to the receiving device 12. The wire begins to move. From node 4 application time analizowanie wire coated with a layer of film-forming arrives at node 7 for supplying heat to the wire with a deposited film-forming, where coverage is there is a process of heat treatment of the exposed film time analizowanie. Wire utverzhdenii film time analizowanie starts to fly back to the coil of the receiving device 12. After the wire is again moved to the specified length L, again actuates the relay counter is the length of the wire and the above process is repeated. Due to the fact that the film time analizowanie is applied to the fixed wire, eliminates many undesirable factors, in particular the impact on the quality of the time analizowanie change speed wire. Due to this, the thickness of the deposited electrophoretic film stably maintained at the same level.

The speed sensor 8 consists of a transparent disk with the shaded segments. The disk is planted on the same axis with the leading roller. On both sides of the disk are located diametrically opposite the led and photodiode. When pulling the wires leading rotates the roller, and with it the disk, alternately closing and opening the luminous flux coming from the led to the photodiode. From the outputs of the led and photodiode are received out-of-phase rectangular pulses, the repetition period of which is equal to the time of passage of the elementary section of the wire through the sensor.

Adjustable constant current source is a controlled current regulator, the input of which the output speed sensor pulses with duration, proporcionalnoe the speed. Load is the electrophoretic layer composition between the body of the application unit time analizowanie and wire.

As time relay 10, the relay 22 and magnetic contactor 23 were taken relays brand FINDER. As time relay 10 was used 85 series (85.0.2.012.0000). As relay 22 was taken 40 series, and as magnetic starter - 25 series.

Specific example

The claimed method was carried out enamelling of copper wire of diameter D=0,67 mm Enameling was carried out with the help of the device shown in figure 1. The housing 13 of the application unit time analizowanie 5 was made of cut steel pipe, the inner diameter of which was equal to 20 mm, and the outer - 24 mm Length of steel pipe L was equal to 10 M. the ends of the pipe were muffled by the covers 14. Cover 14 is made of sheet caprolactam thickness of 20 mm Along the Central axis of the pipe caps 14 have been fixed inlet 18 and outlet 19 calibers, made of stainless steel. The hole diameter of the input caliber match the wire diameter D=0,67 mm Diameter output caliber was equal to D+2dW. It was found that the film thickness of electrophoretic deposited film-forming dW10% thicker film d utverzhdenii time analizowanie wire, i.e. dW=1,1d. Accordingly, the diameter of the output caliber was equal to D+2dW=D+2×1,1d=0,67+2×1,1�0,02=0,714 mm. To configure the modes anoperational deposition film forming the wire is pre-configured modes of deposition. For this purpose, the wire 20 was applied positive potential from the DC regulated power included enalaprilat and stuck a wire through electrophoretic composition, which consisted of the following components, ml/l:

Lac PE-939 marks - to 333.3;

1% - ammonia 1% - NH4OH 156,7;

dioxane (C4H8O2) - 500.

In the process of pulling the wires through the above-mentioned composition filled in the application unit time analizowanie, the positive potential at the output DC regulated power changed as long as the value of the current density of anafarta j reached a value of j=6 mA/cm2=6×10-3×104=60 a/m2lying in the middle of the interval of admissible values of current densities of anafarta. The achievement of the above variables current density is implemented as follows. Pre-determined, which value will be current J anafarta at the current density of anafarta jcf=60 a/m2lying in the middle of the interval of admissible values of current densities of anafarta by: J=πDLjcf=Sjcfwhere D is the wire diameter, m; L - length of wire immersed in the electrophoretic composition, m is considered For the case S=is DL=3,14×67×10 -3×10=0,02038 m2and the current J was equal to the value J=j×S=60×0,02038=1,2228 A≅1,2 A.

The positive potential on the wire is raised until, when the current anafarta reached the calculated values for J=1,2 A. Achieving amperage values J=1,2 And that the current density anafarta was equal to jcf=60 a/m2. After reaching amperage values J=1,2 And the value of the positive potential on the wire to change stopped. This configuration modes is carried out once. In the future when connecting the positive pole of the DC stabilized power source 2 to the wire 20, the current source 2 has always provided a stable current of anafarta value J=1,2 A.

On the basis of specified thickness time analizowanie d=20×10-6m, the density of enamel ρ=2,5×103kg/m3output dry residue current k=8,33×10-5kg/A·s and a current density of anafarta j=6 mA/cm2=6×10-3×104=60 a/m2determined time t anafarta by the formula

It was made two enameled wire with a diameter of D=0.67 mm and a thickness of d time analizowanie equal to 20 μm, one in the prototype method, and the other by the present method. Abilityasia thickness of 20 μm on the prototype method was applied in 8 passes. After each passage caused the enamel layer was subjected to heat treatment. The manufacture of enamelled PR the water by the present method was carried out on the device, schematically depicted in figure 1. Layer time analizowanie thickness of 20 μm by the present method was carried out in a single pass. In both cases, the initial (average) speed V of the pulling wire was 8 m/min≅0,13 m/S.

Analizowaniu made of wires on the prototype method and by the present method were subjected to testing for electric strength. To determine the breakdown voltage of the enamel layer of the test sample with a wire length of 0.5 m was straightened, folded in half and evenly twisted. The loop in place, bend the wires cut and the ends were bred. To the ends of the twisted sample was applied AC voltage with frequency of 50 Hz, and within 30 to gradually increase the voltage from zero to breakdown. The tests were carried out for 20 twists, how to wire manufactured according to the method prototype and wire manufactured by the present method. Then the test results were calculated, the average value of the breakdown voltage. They were respectively In 1800 and 4200 Century

Thickness measurement enamelled wire on the prototype method and the present method 100 random points samples of wire showed that the range of thicknesses time analizowanie in the wire produced by the method prototype, was about 10% of the insulation thickness, whereas the present method is only 0.8%.

Thus, the advantages of the proposed method compared with the method with following prototype:

- the energy consumption during the enameling wire by the claimed method is considerably lower, since the film time analizowanie is applied to the wire in a single pass, whereas in the method prototype for 8-10 passes;

- electric strength time analizowanie deposited on the wire by the present method, 2.5 times higher than the dielectric strength of the time analizowanie deposited on the wire by the method prototype;

- the inventive method compared to the prototype allows to improve the uniformity of thickness time analizowanie.

Sources

1. The production of cables and wires: a Textbook for colleges / Neelov, Ramlakan, Atherina and others; Ed. by Neelova and Ibisch. - M.: Energoizdat, 1981. - s-319.

2. Peshkov I.K. Magnet wire. - M.: Energoizdat, 1988, p.113 (prototype).

The method of manufacture of enameled wire in which the wire put a layer of time analizowanie with further supply of heat to the wire caused by egalitaria, characterized in that the coating time analizowanie carried out by electrodeposition using an electrophoretic composition comprising the following components, ml/l:

290÷300
1%ammonia 1% - NH4OH110÷120
dioxane (C4H8O2)rest

while pre-select the value of the current density j, which lies in the range of current densities of anafarta (2÷10) mA/cm2immerse the plot moving wire of length L in the above-mentioned electrophoretic composition, stop wire, serves on it relative to a grounded casing of the application unit time analizowanie positive potential, the value of which provides the current value of anafarta J equal to J=πDLj, where D is the wire diameter, m; and for a given current J is then precipitated onto immersed in the electrophoretic composition of a section of wire film time analizowanie during the time t, determined by the expressionwhere ρ is the density of the enamel, kg/m3, d is the thickness of time analizowanie, m, k is the output of dry residue current, kg/A·, then after time t move the wire to a length equal to L, again stop the wire and when the above current values of J anafarta during the mentioned time t carry out the electrodeposition film time analizowanie for the next section of the wire L, this alternating process continues until the end of the process of enameling.



 

Same patents:

Electric wire // 2154867
The invention relates to a cable technique, namely, to designs wires

The invention relates to technology products, electronic equipment, and in particular to methods for the production of insulating coatings on multi-conductor cables

The invention relates to the cable industry, in particular, to the production of enamelled wires

FIELD: electricity.

SUBSTANCE: on the basis of a film-generating varnish PE-933 of grade B an electrophoretic composition is created, which comprises the following components, ml/l: varnish PE-939 of grade B - (290÷300); 1% - liquid ammonia 1 % - NH4OH - (110÷120); dioxane (C4H8O2) - balance. Previously a certain value of current density is selected, a section of a moving wire is submerged into the specified electrophoretic composition, the wire is stopped, positive potential is supplied to it relative to a grounded body of a unit of enamel insulation application, and its value provides for a certain value of anophoresis current, an enamel insulation film is deposited onto a wire section submerged into the electrophoretic composition for a time determined in accordance with the given ratio, then the wire is moved again, the wire is again stopped, the enamel insulation film is electrically deposited onto the subsequent section of wire, such alternating process is continued until completion of the enamelling process.

EFFECT: power input reduction.

1 dwg

FIELD: electricity.

SUBSTANCE: on the basis of a film-forming varnish PE-933 of grade B an electrophoretic composition is created, containing the following components, in ml/l: varnish PE-939 of grade B - (290÷300); 1% - liquid ammonia 1% - NH4OH - (110÷120); dioxane (C4H8O2) - balance; onto a moving wire a positive potential is supplied relative to a grounded body of a bath, at the same time the density of current j of anaphoresis is varied in the range j=(2÷10) mA/cm2 proportionately to the speed of wire motion in accordance with the expression where d - thickness of enamel insulation, m; D - wire diameter, in m; L - length of the electrophoretic bath, in m; ρ - density of enamel, kg/m3; k - output of dry residue by current, kg/A×sec; V - speed of wire motion, m/sec.

EFFECT: reduced power inputs for enamelling a wire, higher electric strength of enamel insulation, higher evenness of enamel insulation thickness evenness.

3 dwg

FIELD: chemistry.

SUBSTANCE: cold curing catalyst is used to cure an impregnating compound deposited on a glass fabric and containing carbon filler, siloxane rubber and an organic solvent. Percentage content of the catalyst relative to the siloxane rubber, needed to cure the impregnating compound in the drying chamber of an impregnating machine, is established depending on the length of the chamber, the speed of movement of the glass fabric and temperature in the drying chamber. The established amount of the catalyst is divided into a part which is directly added to the impregnating compound and a part which is added to the glass fabric before being passed through a bath of the impregnating machine.

EFFECT: simple process of producing semiconducting rubber glass fabric by expanding the variation range of parameters of the temperature and time conditions of curing the material in the impregnating machine, low power consumption.

1 tbl

FIELD: technological processes.

SUBSTANCE: invention relates to production of enamelled winding wire with application of powder thermosetting coating materials. Device comprises a composite sealed housing consisting of a pressure chamber, chamber for transition of powder thermosetting coating material into a highly elastic state, a chamber for transition of coating material from highly elastic state to another physical state, into which it transitions when heating coating material in highly elastic state, a chamber enamelling, as well as an enamel furnace and cooling chamber.

EFFECT: invention provides low enamelling process temperature and number of layers of insulation of winding wires.

11 cl, 1 dwg

FIELD: metal processing.

SUBSTANCE: invention relates to production of enamelled winding wire with application of powdered thermosetting coating materials. Device for application of powdered thermosetting coating material on wire comprises a composite sealed housing, consisting of a pressure chamber, a chamber for transition of powdered thermosetting coating material into other physical state, into which it transitions when heated to temperature of 40-85 °C, chamber for transition of coating material from said other physical state into liquid state, into which it transitions when heated to temperature 86-125 °C and enamelling chamber.

EFFECT: invention provides low enamelling process temperature and number of layers of insulation of winding wires.

11 cl, 1 dwg

FIELD: manufacturing technology.

SUBSTANCE: invention relates to cable industry, in particular to production of enamelled wires. In method performing application of enamel insulation film on wire by anaphoresis at current density j of 2÷10 mA/cm2 with subsequent heat supply to wire coated with enamel insulation. At that, during application of enamel insulation film moving wire section with length of L is immersed into electrophoretic compound, wire is stopped, suppled with positive potential, which value provides anaphoresis current value of I, equal to I=πDLj, where D is wire diameter, m, and with said current value depositing enamel insulation film on wire section immersed into electrophoretic compound for certain period of time. At that, for application of enamel insulation electrophoretic compound is used consisting of following components, pts.wt: polyglyceroethyleneterephtalate resin 46.0-48.0, 45-50 % polybutyltitanate in xylene 1.4-1.7, diethylene glycol 0.1-5.0, xylenol 51.6-53.0, solvent 9.3-19.0, dioxane 64-70, 1 % aqueous ammonia 22-24, boron nitride nanotubes 10-12.

EFFECT: invention enables increasing in heat conductivity and electrical strength of applied enamel insulation.

1 cl, 1 tbl

FIELD: electricity.

SUBSTANCE: methods and systems for piezoelectric coating formation on the powerline cable with the use of the sol-gel materials. The cable may be supplied through the cavity with the sol-gel material, which contains the piezoelectric material, with getting the cable uncured overlayer. After that, one sets the layer solid using, for example, the infrared light, the ultra-violet light and/or other types of radiation. The cable may be hanged within the coating application system in such a way that the uncured layer does not contact any system components until the layer is appropriately cured. The cured layer piezoelectric parameters may be tested within the system in order to provide the reset control. The cured layer, which could be mentioned as the piezoelectric coating, provokes the resistance heating on the cable outer surface at the time of cable vibration because of the alternate current transfer and because of the environmental agents.

EFFECT: invention provides an opportunity to simplify the deicing on the lines.

20 cl, 4 dwg

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