CN115497686B - Production process of medium-thin enameled wire - Google Patents
Production process of medium-thin enameled wire Download PDFInfo
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- CN115497686B CN115497686B CN202210734703.1A CN202210734703A CN115497686B CN 115497686 B CN115497686 B CN 115497686B CN 202210734703 A CN202210734703 A CN 202210734703A CN 115497686 B CN115497686 B CN 115497686B
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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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/0016—Apparatus or processes specially adapted for manufacturing conductors or cables for heat treatment
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/065—Insulating conductors with lacquers or enamels
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/16—Insulating conductors or cables by passing through or dipping in a liquid bath; by spraying
- H01B13/165—Insulating conductors or cables by passing through or dipping in a liquid bath; by spraying by spraying
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/30—Drying; Impregnating
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- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
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- Processes Specially Adapted For Manufacturing Cables (AREA)
Abstract
The invention discloses a production process of a medium-thin enameled wire, which comprises the following steps of: paying off, annealing, dehumidifying, roller painting, painting by adopting a special pressure relief die, baking, cooling, coating lubricating oil on the surface and taking in a spool. The invention adopts high solid content paint, the paint viscosity is high, paint brought into a mould forms pressure during painting, copper wires are easy to be drawn down or broken, the invention adopts special pressure release mould painting, and the pressure release notch is added at the front end single side of a sizing area of the mould to discharge excessive paint, thereby avoiding the occurrence of copper wires to be drawn down or broken, reducing the paint consumption by 8%, reducing the broken wire rate of the medium thin wire enameled wire and greatly improving the product quality.
Description
Technical Field
The invention relates to the technical field of enameled wire production, in particular to a production process of a medium-thin enameled wire.
Background
The painting process of the current production process of fine wires (the wire diameter is 0.15-0.4 mm) is generally to paint by adopting a felt painting mode, the paint generally adopts paint with the solid content lower than 32%, and organic solvents contained in the paint are easy to evaporate, so that environmental pollution is caused.
It is well known that the use of high solids wire enamel reduces not only the cost but also improves certain properties, but the actual realization of industrial use of high solids wire enamels is limited by various conditions. The enamelled wire paint generally runs at a high speed of 200-350 m/min, and the high solid content paint has high viscosity, poor self-leveling property and high resistance, so that the fine wires are easily broken, and the production efficiency is affected.
In order to solve the above problems, development of a production process of a medium-thin wire enameled wire is urgently needed.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a production process of a medium-thin enameled wire, which can reduce the paint consumption by 8%, reduce the breakage rate of the medium-thin enameled wire, greatly improve the product quality and reduce the environmental pollution by developing high-solid-content paint and improving the painting process and adopting a special pressure release die for painting.
The technical scheme of the invention is as follows: a production process of a medium-thin enameled wire comprises the following steps:
s1, paying off: placing a wire coil to be processed on a pay-off reel;
s2, annealing: annealing the wire rod in the step S1 in an annealing furnace, stewing the wire rod in the annealing furnace to remove tensile stress, softening the wire rod, and removing lubricant and greasy dirt remained on the surface of the wire rod in the stretching process;
s3, dehumidifying: removing moisture on the surface of the wire rod subjected to annealing treatment in the step S2 by using a dehumidifying pipeline for heating hot air;
s4, roller painting: the wire coating is brought into a special pressure relief mould at a constant speed through rotating a roller groove in a paint groove;
s5, adopting a special pressure relief die to paint: after the wire coating enters the die, the excessive coating is discharged from the pressure relief notch at the tail part, so that the wire is prevented from being blocked and broken due to overlarge coating viscosity in the pressure relief die;
s6, baking: evaporating and solidifying the wire rod painted in the step S5 in a baking oven to form a paint film on the outer layer of the wire rod;
s7, cooling: naturally cooling the wire after the wire comes out of the burning furnace;
s8, coating lubricating oil on the surface: lubricating the surface of the baked wire rod through an oil box;
s9, income spool: the wire rod processed in the previous step is coiled by a coiling machine, and the coiled wire rod is transported to a storage warehouse for storage;
repeating the steps S4-S7 for 5-9 times;
the wire coating in the steps S4-S5 is a high-solid-content coating with the solid content of 40-45%;
the special pressure relief die structure in the step S4-S5 comprises a die body, a die cavity penetrating through the die body and a die core, wherein the die body is a cylinder and consists of three sections of cylinders with different diameters and a transition section, the three sections of cylinders with different diameters are respectively an upper section cylinder, a middle section cylinder and a lower section cylinder, the diameter of the lower section cylinder is larger than that of the upper section cylinder, the diameter of the upper section cylinder is larger than that of the middle section cylinder, the middle section cylinder is connected with the lower section cylinder through the transition section, the die core is arranged at the upper end inside the upper section cylinder, a sizing area is arranged in the middle of the die core, the connection position between the bottom of the die core and the die cavity is an arc angle, and one side of the middle of the upper section cylinder is provided with a pressure relief notch which is connected with the die cavity;
the number of the special pressure relief molds in the step S5 is five, and the inner diameters of the mold cavities are sequentially arranged from small to large.
Further, the high-solid-content coating is one of polyester coating, polyurethane coating and polyimide coating, and the polyester coating, the polyurethane coating and the polyester imine coating comprise the following components in percentage by weight: the polyester, polyurethane and polyester imine resins account for 38-45% and the solvents account for 55-62%, wherein the solvents comprise the following components in percentage by weight: 20-25% of cresol, 20-25% of phenol and 5.5-28% of xylene.
Further, the high-solid-content coating is polyamide imide, and the polyamide imide coating comprises the following components in percentage by weight: 28-33% of polyamide-imide resin and 67-72% of solvent, wherein the solvent comprises the following components in percentage by weight: 60-65% of N-methyl pyrrolidone and 5-7% of dimethylbenzene.
Further, the included angle between the pressure relief notch and the die body is 75 degrees, and the included angle between the transition section and the lower section cylinder is 135 degrees.
Further, the mold core is made of tungsten steel, and the tungsten steel has a series of excellent performances such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and the like.
Further, chamfer angles are formed in four corners of the die body, and the die body is made of stainless steel.
Further, a ceramic ring is arranged at the bottom of the die body.
Working principle:
when the special pressure relief die is used for painting, the enamelled wire is fully painted in the paint groove, then enters the die cavity from the die inlet at the bottom of the lower section cylinder, finally comes out from the middle of the die core for a sizing area (also a die outlet), and the paint brought into the die during painting forms pressure due to high viscosity and solid content of the paint, so that copper wires are easily drawn down or broken, and redundant paint is discharged by adding a pressure relief notch on one side of the front end of the sizing area of the die, so that the copper wires are prevented from being drawn down or broken.
The invention has the beneficial effects that:
the invention can effectively improve the solid content of the wire enamel and reduce the environmental pollution of the wire enamel.
The special pressure relief die coating is designed, excessive coating is discharged by adding the pressure relief opening at the front end single side of the die sizing area, the occurrence of copper wire pulling down or wire breakage is avoided, the consumption of the coating can be reduced by 8 percent, the wire breakage rate of the medium thin wire enamelled wire is reduced, and the product quality is greatly improved.
Drawings
Fig. 1 is a schematic diagram of a special pressure relief mold according to the present invention.
The ceramic mold comprises a 1-mold body, a 11-upper section cylinder, a 12-middle section cylinder, a 13-lower section cylinder, a 2-mold cavity, a 3-mold core, a 31-sizing area, a 32-pressure relief notch, a 4-transition section, a 5-ceramic ring.
Detailed Description
The invention will be further illustrated by the following non-limiting examples, which illustrate the invention.
The technical scheme of the invention is as follows: a production process of a medium-thin enameled wire comprises the following steps:
s1, paying off: placing a wire coil to be processed on a pay-off reel;
s2, annealing: annealing the wire rod in the step S1 in an annealing furnace, stewing the wire rod in the annealing furnace to remove tensile stress, softening the wire rod, and removing lubricant and greasy dirt remained on the surface of the wire rod in the stretching process;
s3, dehumidifying: removing moisture on the surface of the wire rod subjected to annealing treatment in the step S2 by using a dehumidifying pipeline for heating hot air;
s4, roller painting: the wire coating is brought into a special pressure relief mould at a constant speed through rotating a roller groove in a paint groove;
s5, adopting a special pressure relief die to paint: after the paint enters the die, the excessive paint is discharged from the pressure relief notch at the tail part, so that the phenomenon that the wire is blocked and broken in the pressure relief die due to excessive viscosity of the paint is avoided;
s6, baking: evaporating and solidifying the wire rod painted in the step S5 in a baking oven to form a paint film on the outer layer of the wire rod;
s7, cooling: naturally cooling the wire after the wire comes out of the burning furnace;
s8, coating lubricating oil on the surface: lubricating the surface of the baked wire rod through an oil box;
s9, income spool: the wire rod processed in the previous step is coiled by a coiling machine, and the coiled wire rod is transported to a storage warehouse for storage;
the steps S4-S7 are repeated 8 times.
The wire coating is a high-solid-content coating with the solid content of 42%;
referring to fig. 1, the special pressure relief mold structure comprises a mold body 1, a mold cavity 2 and a mold core 3 penetrating through the mold body 1, wherein the mold body 1 is a cylinder and is composed of three sections of cylinders with different diameters and a transition section 4, the three sections of cylinders with different diameters are an upper section cylinder 11, a middle section cylinder 12 and a lower section cylinder 13 respectively, the diameter of the lower section cylinder 13 is larger than that of the upper section cylinder 11, the diameter of the upper section cylinder 11 is larger than that of the middle section cylinder 12, the middle section cylinder 12 is connected with the lower section cylinder 13 through the transition section 4, the mold core 3 is arranged at the upper end inside the upper section cylinder 11, a sizing area 31 is arranged in the middle of the mold core 3, the connection position of the bottom of the mold core 3 and the mold cavity 2 is an arc angle, a pressure relief notch 32 is arranged at one side of the front end of the sizing area 31 and is positioned at one side in the middle of the upper section cylinder 11, and the pressure relief notch 32 is connected with the mold cavity 2.
The number of the special pressure relief molds in the step S5 is five, and the inner diameters of the mold cavities 2 are sequentially arranged from small to large.
Further, the included angle between the pressure relief notch 32 and the die body 1 is 75 °, and the included angle between the transition section 4 and the lower section cylinder 13 is 135 °.
Further, the mold core 3 is made of tungsten steel, and the tungsten steel has a series of excellent performances such as high hardness, wear resistance, good strength and toughness, heat resistance, corrosion resistance and the like.
Further, chamfer angles are formed at four corners of the die body 1, and the die body 1 is made of stainless steel.
Further, the bottom of the mold body 1 is provided with a ceramic ring 5.
Example 1
The high-solid-content coating is a polyester coating and comprises the following components in percentage by weight: the polyester resin accounts for 40 percent, the solvent accounts for 60 percent, wherein the cresol accounts for 22 percent, the phenol accounts for 22 percent and the xylene accounts for 16 percent.
Example 2
The high-solid-content coating is polyurethane coating and comprises the following components in percentage by weight: the polyurethane resin accounts for 45 percent, the solvent accounts for 55 percent, wherein the cresol accounts for 20 percent, the phenol accounts for 20 percent and the dimethylbenzene accounts for 15 percent.
Example 3
The high-solid-content paint is a polyester imide paint, and comprises the following components in percentage by weight: the polyester-imide resins were 38% and the solvents were 62% respectively, with 25% of cresol, 25% of phenol and 12% of xylene.
Example 4
The high-solid-content coating is polyamide imide, and the polyamide imide coating comprises the following components in percentage by weight: the polyamide imide resin accounts for 30 percent and the solvent accounts for 70 percent, wherein the solvent comprises the following components in percentage by weight: 63% of N-methyl pyrrolidone and 7% of dimethylbenzene.
The enameled wire prepared by adopting the embodiment can reduce the paint consumption by 8%, reduce the breakage rate of the medium thin wire enameled wire and greatly improve the product quality.
The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way or in any way, and all technical solutions according to the present invention are within the scope of the present invention, and any equivalent changes and modifications made to the above-described embodiment according to the present invention should be considered as the scope of the present invention.
Claims (7)
1. The production process of the medium-thin enameled wire is characterized by comprising the following steps of:
s1, paying off: placing a wire coil to be processed on a pay-off reel;
s2, annealing: annealing the wire rod in the step S1 in an annealing furnace, removing tensile stress through annealing in the annealing furnace, softening the wire rod, and removing lubricant and greasy dirt remained on the surface of the wire rod in the stretching process;
s3, dehumidifying: removing moisture on the surface of the wire rod subjected to annealing treatment in the step S2 by using a dehumidifying pipeline for heating hot air;
s4, roller painting: the wire coating is brought into a special pressure relief mould at a constant speed through rotating a roller groove in a paint groove;
s5, adopting a special pressure relief die to paint: after the wire coating enters the die, the excessive coating is discharged from the pressure relief notch at the tail part, so that the wire is prevented from being blocked and broken due to overlarge coating viscosity in the pressure relief die;
s6, baking: evaporating and solidifying the wire rod painted in the step S5 in a baking oven to form a paint film on the outer layer of the wire rod;
s7, cooling: naturally cooling the wire after the wire is discharged from the barbecue oven;
s8, coating lubricating oil on the surface: lubricating the surface of the baked wire rod through an oil box;
s9, income spool: the wire rod processed in the previous step is coiled by a coiling machine, and the coiled wire rod is transported to a storage warehouse for storage;
repeating the steps S4-S7 for 5-9 times;
the wire coating in the steps S4-S5 is a high-solid-content coating with the solid content of 40-45%;
the special pressure relief die structure in the step S4-S5 comprises a die body, a die cavity and a die core penetrating through the die body, wherein the die body is a cylinder and consists of three sections of cylinders with different diameters and a transition section, the three sections of cylinders with different diameters are respectively an upper section cylinder, a middle section cylinder and a lower section cylinder, the diameter of the lower section cylinder is larger than that of the upper section cylinder, and the diameter of the upper section cylinder is larger than that of the upper section cylinder
The diameter of the middle section cylinder is equal to that of the lower section cylinder, the middle section cylinder is connected with the lower section cylinder through a transition section, the die core is arranged at the upper end inside the upper section cylinder, a sizing area is arranged in the middle of the die core, the connection position between the bottom of the die core and the die cavity is set to be an arc angle, one side of the middle of the upper section cylinder is provided with a pressure relief notch, and the pressure relief notch is connected with the die cavity;
the number of the special pressure relief molds in the step S5 is five, and the inner diameters of the mold cavities are sequentially arranged from small to large.
2. The production process of the medium-fine enameled wire according to claim 1, wherein the high-solid-content paint is one of polyester paint, polyurethane paint and polyimide paint, and the polyester paint, the polyurethane paint and the polyester imide paint comprise the following components in percentage by weight: the polyester, polyurethane and polyester imine resins account for 38-45%, and the solvents account for 55-62%.
3. The process for producing the medium-fine enameled wire according to claim 1, wherein the high-solid-content coating is polyamide imide, and the polyamide imide coating comprises the following components in percentage by weight: 28-33% of polyamide-imide resin and 67-72% of solvent, wherein the solvent comprises the following components in percentage by weight: 60-65% of N-methylpyrrolidone and 5-7% of dimethylbenzene.
4. The process according to claim 1, wherein the angle between the relief notch and the die body is 75 ° and the angle between the transition section and the lower section cylinder is 135 °.
5. The process for manufacturing a fine enameled wire according to claim 1, characterized in that the die core is made of tungsten steel.
6. The process for manufacturing a fine enameled wire according to claim 1, wherein chamfers are arranged at four corners of the die body, and the die body is made of stainless steel.
7. The process for manufacturing a fine enameled wire according to claim 1 wherein a ceramic ring is arranged at the bottom of the die body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210734703.1A CN115497686B (en) | 2022-06-27 | 2022-06-27 | Production process of medium-thin enameled wire |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210734703.1A CN115497686B (en) | 2022-06-27 | 2022-06-27 | Production process of medium-thin enameled wire |
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| Publication Number | Publication Date |
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| CN115497686A CN115497686A (en) | 2022-12-20 |
| CN115497686B true CN115497686B (en) | 2023-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202210734703.1A Active CN115497686B (en) | 2022-06-27 | 2022-06-27 | Production process of medium-thin enameled wire |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115971274B (en) * | 2023-02-13 | 2024-02-09 | 科城铜业(英德)有限公司 | Improvement process for reducing breakage rate of superfine wire |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5331984B2 (en) * | 2006-12-19 | 2013-10-30 | 日立電線株式会社 | Paint applicator |
| CN201562497U (en) * | 2009-09-17 | 2010-08-25 | 江西铜业股份有限公司 | Novel painting die of enamelling machine |
| CN108878059A (en) * | 2018-06-27 | 2018-11-23 | 深圳市广南电子有限公司 | The production method of ultra micro fine enamelled wire |
| CN109300611B (en) * | 2018-08-10 | 2020-08-21 | 铜陵精远线模有限责任公司 | Split formula wire japanning mould |
| CN112289515A (en) * | 2020-10-23 | 2021-01-29 | 天津精达里亚特种漆包线有限公司 | Suspension type self-centering painting part and painting mold of electromagnetic wire |
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