CN114974732A - Manufacturing method of low-smoke halogen-free electric wire - Google Patents
Manufacturing method of low-smoke halogen-free electric wire Download PDFInfo
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- CN114974732A CN114974732A CN202210547693.0A CN202210547693A CN114974732A CN 114974732 A CN114974732 A CN 114974732A CN 202210547693 A CN202210547693 A CN 202210547693A CN 114974732 A CN114974732 A CN 114974732A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 51
- 239000000779 smoke Substances 0.000 title claims abstract description 35
- 238000012360 testing method Methods 0.000 claims abstract description 50
- 239000011810 insulating material Substances 0.000 claims abstract description 41
- 239000000463 material Substances 0.000 claims abstract description 32
- 238000012545 processing Methods 0.000 claims abstract description 26
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000004132 cross linking Methods 0.000 claims abstract description 19
- 238000001035 drying Methods 0.000 claims abstract description 9
- 238000000748 compression moulding Methods 0.000 claims abstract description 5
- 238000005070 sampling Methods 0.000 claims abstract description 5
- 229910052736 halogen Inorganic materials 0.000 claims description 14
- 229920000098 polyolefin Polymers 0.000 claims description 12
- 150000002367 halogens Chemical class 0.000 claims description 11
- 238000001816 cooling Methods 0.000 claims description 3
- 239000012774 insulation material Substances 0.000 claims description 2
- 238000001704 evaporation Methods 0.000 abstract description 6
- 230000002950 deficient Effects 0.000 abstract description 5
- 239000011148 porous material Substances 0.000 abstract description 5
- 238000010923 batch production Methods 0.000 abstract description 4
- 230000008020 evaporation Effects 0.000 abstract description 4
- 238000001125 extrusion Methods 0.000 description 5
- 239000002994 raw material Substances 0.000 description 5
- 230000007547 defect Effects 0.000 description 3
- 238000012797 qualification Methods 0.000 description 3
- RNFJDJUURJAICM-UHFFFAOYSA-N 2,2,4,4,6,6-hexaphenoxy-1,3,5-triaza-2$l^{5},4$l^{5},6$l^{5}-triphosphacyclohexa-1,3,5-triene Chemical compound N=1P(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP(OC=2C=CC=CC=2)(OC=2C=CC=CC=2)=NP=1(OC=1C=CC=CC=1)OC1=CC=CC=C1 RNFJDJUURJAICM-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000003063 flame retardant Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000009970 fire resistant effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 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
-
- 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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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Organic Insulating Materials (AREA)
Abstract
The invention relates to the field of wire production, in particular to a manufacturing method of a low-smoke halogen-free wire, which comprises the following steps: selecting an ultraviolet light insulating material and carrying out pre-drying treatment. Sampling the ultraviolet light insulating material, plasticizing the sample, forming a test piece by adopting a compression molding method, and carrying out ultraviolet light irradiation crosslinking processing on the test piece and testing. And setting processing parameters of the processing equipment. Plasticizing the ultraviolet light insulating material, extruding the plasticized ultraviolet light insulating material to manufacture the electric wire, and carrying out ultraviolet light irradiation crosslinking at a preset temperature. The pre-drying can reduce the moisture of the material and the possibility of poor product caused by pores generated by moisture evaporation during production. In addition, the test piece subjected to plasticizing and ultraviolet irradiation crosslinking processing is manufactured before batch production for testing, so that the condition that the material is unqualified can be avoided, and defective products caused by large temperature errors in the manufacturing process are prevented. In conclusion, the low-smoke halogen-free wire with high yield can be manufactured through the steps.
Description
Technical Field
The invention relates to the field of wire production, in particular to a manufacturing method of a low-smoke halogen-free wire.
Background
The low-smoke halogen-free flame-retardant fire-resistant electric wire has good flame-retardant performance, is an electric wire which does not contain halogen acid in gas generated by combustion and has low smoke emission, and is increasingly applied to horizontal wiring of important projects, personnel and equipment intensive places such as tracks, power stations, chemical plants, ships, high-rise buildings, information industries and the like. The existing low-smoke halogen-free electric wire usually adopts ultraviolet light low-smoke halogen-free cross-linked polyolefin material to pass through ultraviolet light cross-linking equipment, but the ultraviolet light low-smoke halogen-free cross-linked polyolefin material is used as a novel material, the processing technology is immature, and the qualified rate is relatively low.
Disclosure of Invention
Based on the method, the invention provides the manufacturing method of the low-smoke halogen-free electric wire, which can improve the qualification rate.
The technical scheme of the invention is as follows: a manufacturing method of a low-smoke halogen-free electric wire comprises the following steps:
s1: selecting an ultraviolet light insulating material;
s2: pre-drying the ultraviolet light insulating material;
s3: sampling the ultraviolet light insulating material, plasticizing the obtained sample, forming a test piece by adopting a compression molding method, and testing the test piece after ultraviolet light irradiation crosslinking processing;
s4: when the test piece is qualified, setting processing parameters of processing equipment;
s5: plasticizing the ultraviolet light insulating material, extruding the plasticized ultraviolet light insulating material to manufacture an electric wire, and carrying out ultraviolet light irradiation crosslinking at a preset temperature.
Optionally, the ultraviolet light insulating material is polyolefin.
Optionally, the material is pre-dried at 80 ± 5 ℃ for more than 2 hours.
Optionally, the ultraviolet light insulation material is extruded by an extruder, and the actual temperature of each area in the extruder is controlled within a range of +/-5 ℃ of the set temperature of the extruder.
Optionally, the plasticizing temperature of the ultraviolet light insulating material is 150-155 ℃, the ultraviolet light insulating material is pressurized and heated for 4min after being preheated for 6min in an environment of 150-160 ℃, and then is pressurized and cooled to room temperature, and the pressure applied to the ultraviolet light insulating material in the pressurizing process is greater than 15 MPa.
Optionally, the thickness of the test piece is 1.0mm ± 0.1 mm.
Optionally, the test of the test strip includes a thermal extension test and a tensile strength test.
Optionally, the hot elongation test requires an elongation under load of less than 70% and a set after cooling of less than 15%.
Optionally, the tensile strength test requires that the tensile strength is greater than 10.0Mpa, and the elongation at break is greater than 150%.
Optionally, the ultraviolet light insulating material is subjected to ultraviolet light irradiation crosslinking processing by ultraviolet light irradiation equipment, the actual processing power of the ultraviolet light irradiation equipment is 80% -100% of the highest power of the ultraviolet light irradiation equipment, in the ultraviolet light irradiation processing process, the jitter amplitude of the electric wire is less than 20mm, and the moving speed of the electric wire is less than 140 m/min.
Compared with the prior art, the embodiment of the invention has the following beneficial effects:
according to the manufacturing method of the low-smoke halogen-free electric wire, the material is pre-dried, so that the moisture of the material can be reduced, and the possibility of poor product caused by pores generated by moisture evaporation during production is reduced. In addition, the test piece subjected to plasticizing and ultraviolet irradiation crosslinking processing is manufactured before batch production for testing, so that the unqualified material can be avoided, the qualified condition of the material can be judged after the wire is manufactured without extrusion, and the defective product caused by large temperature error in the manufacturing process is prevented. In conclusion, the low-smoke halogen-free wire with high qualification rate can be manufactured through the steps.
Drawings
Fig. 1 is a flowchart of a manufacturing method of a low smoke zero halogen electric wire according to an embodiment of the present invention.
FIG. 2 shows a thickness of 1.5mm in the method for manufacturing a low smoke zero halogen wire according to the embodiment of the present invention 2 Line speed and elongation at break change line plots.
FIG. 3 shows an embodiment of the invention, in which the thickness of the low smoke zero halogen wire is 2.5mm 2 Line speed and elongation at break change line plot.
FIG. 4 is a schematic diagram of a 4.0mm low smoke zero halogen wire manufactured by the method of the present invention 2 Line speed and elongation at break change line plot.
FIG. 5 shows a 6.0mm low smoke zero halogen wire manufactured by the method of the present invention 2 Line speed and elongation at break change line plot.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In addition, the terms "first", "second", and the like are employed in the present invention to describe various information, but the information should not be limited to these terms, which are used only to distinguish the same type of information from each other. For example, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information, without departing from the scope of the present invention.
Referring to fig. 1, the embodiment provides a manufacturing method of a low smoke zero halogen electric wire, including the following steps:
s1: selecting an ultraviolet light insulating material;
s2: pre-drying the ultraviolet light insulating material;
s3: sampling the ultraviolet light insulating material, plasticizing the obtained sample, forming a test piece by adopting a compression molding method, and testing the test piece after ultraviolet light irradiation crosslinking processing;
s4: when the test piece is qualified, setting processing parameters of processing equipment;
s5: plasticizing the ultraviolet light insulating material, extruding the plasticized ultraviolet light insulating material to manufacture an electric wire, and carrying out ultraviolet light irradiation crosslinking at a preset temperature.
The material is pre-dried, so that the moisture of the material can be reduced, and the possibility of poor product caused by pores generated by evaporating moisture in production is reduced. In addition, the test piece subjected to plasticizing and ultraviolet irradiation crosslinking processing is manufactured before batch production for testing, so that the unqualified material can be avoided, the qualified condition of the material can be judged after the wire is manufactured without extrusion, and the defective product caused by large temperature error in the manufacturing process is prevented. In conclusion, the low-smoke halogen-free wire with high yield can be manufactured through the steps.
Preferably, in this embodiment, the uv insulating material is polyolefin. The polyolefin has good waterproofness, insulativity and corrosion resistance, can be used as a production material of electric wires, and can also keep stable structure when being subjected to irradiation crosslinking processing in ultraviolet irradiation equipment.
Preferably, in this embodiment, the material pre-drying process is to pre-dry the material at 80 ℃ ± 5 ℃, and the material drying time is greater than 2 hours. The moisture in the material can be evaporated through pre-drying, so that the defect caused by the formation of pores due to the evaporation of the moisture in the material in the production stage is prevented, and the purity of the material can be improved, so that the qualified rate of the formed electric wire is ensured. In addition, when the temperature was too high, the structure of material took place to destroy easily, leads to appearing unfavorable condition such as caking, and when the temperature was too low, the moisture evaporation efficiency was lower, can't make the interior moisture of material evaporate completely.
Preferably, in this embodiment, the ultraviolet light insulating material is extruded by an extruder, and the actual temperature of each region in the extruder is controlled within ± 5 ℃ of the set temperature of the extruder. The set temperature and the actual temperature of the extruder usually have a certain difference, the temperature of each area in the extruder has a certain difference, and the physical property difference of the polyolefin at different temperatures is large, so that the temperature of each area of the extruder is monitored, the difference between the temperature in each area and the set temperature is reduced, and the stability of the polyolefin in the extrusion process can be ensured.
Preferably, in this embodiment, the plasticizing temperature of the ultraviolet light insulating material is 150 to 155 ℃, the ultraviolet light insulating material is preheated for 6min without pressurization in an environment of 150 to 160 ℃, then pressurized and heated for 4min, and then pressurized and cooled to room temperature, and the pressure applied to the ultraviolet light insulating material in the pressurizing process is greater than 15 MPa. After plasticizing, preheating without pressurization and preheating the ultraviolet light insulating material, the ultraviolet light insulating material can be subjected to operation conditions which are similar to and worse than those in the process of producing electric wires, and the ultraviolet light insulating material subjected to the steps is made into a test piece, and after treatment and testing, the defects caused by a single batch of material can be avoided.
Preferably, in this embodiment, the test includes a thermal extension test and a tensile strength test. Specifically, in this example, the elongation under load is required to be less than 70%, the permanent deformation after cooling is required to be less than 15%, the tensile strength is required to be greater than 10.0Mpa, and the elongation at break is required to be greater than 150%. The mechanical performance test can confirm that the batch of materials and the preset production process meet the production conditions, so that the production yield is ensured. In addition, during the process of manufacturing the finished wire product by using the raw material, the raw material is lost, so that the breaking elongation is reduced, and therefore, in the test of the raw material, the breaking elongation more than 150% is required to enable the breaking elongation after the production of the wire to be within the qualified range.
Preferably, in this embodiment, the ultraviolet light insulating material is processed by ultraviolet light irradiation crosslinking through an ultraviolet light irradiation device, the actual processing power of the ultraviolet light irradiation device is 80% -100% of the highest power of the ultraviolet light irradiation device, in the ultraviolet light irradiation processing process, the jitter amplitude of the wire production is less than 20mm, and the wire moving speed is less than 140 m/min. When the power of the ultraviolet irradiation equipment is too low, the production efficiency is too low, and when the jitter amplitude of the wire production is too high or the wire production speed is too high, defective products are easily increased.
Specifically, referring to fig. 2, fig. 3, fig. 4 and fig. 5, in the present embodiment, the test results show that the insulation elongation at break all show a tendency of rising first and then falling in the production speed of the electric wire from 80m/min to 120m/min, and the minimum value of the elongation at break is greater than 120%, that is, after the electric wire is produced from the raw material into a product, the elongation at break all meet the requirements of the electric wire in use.
The manufacturing method of the low-smoke halogen-free electric wire provided by the embodiment comprises the following steps: selecting polyolefin, carrying out pre-drying treatment on the material at 80 +/-5 ℃ for 2 hours, sampling and plasticizing the polyolefin, preparing a test piece by adopting a compression molding method, and carrying out ultraviolet irradiation crosslinking processing on the test piece to test the performance of the test piece. After the test is passed, the errors of the temperature of each area in the extruder and the set temperature are confirmed to be within the range of 5 ℃, the power of ultraviolet irradiation equipment, the shaking amplitude of the electric wire production and the production speed are adjusted, the production of the low-smoke halogen-free electric wire is completed through the extruder, and the ultraviolet irradiation equipment is used for irradiation crosslinking at the preset temperature, so that the low-smoke halogen-free electric wire with high qualification rate can be produced.
The manufacturing method of the low-smoke halogen-free electric wire has the following beneficial effects:
firstly, the material is pre-dried, so that the moisture of the material can be reduced, and the possibility of poor product caused by pores generated by evaporating moisture in production is reduced. In addition, the test piece subjected to plasticizing and ultraviolet irradiation crosslinking processing is manufactured before batch production for testing, so that the unqualified material can be avoided, the qualified condition of the material can be judged after the wire is manufactured without extrusion, and the defective product caused by large temperature error in the manufacturing process is prevented. In conclusion, the low-smoke halogen-free wire with high yield can be manufactured through the steps.
Secondly, the set temperature and the actual temperature of the extruder usually have a certain difference, the temperature of each area in the extruder has a certain difference, and the physical property difference of the polyolefin at different temperatures is large, so that the temperature of each area of the extruder is monitored, the difference between the temperature in each area and the set temperature is reduced, and the stability of the polyolefin in the extrusion process can be ensured.
And thirdly, plasticizing, preheating without pressurizing and preheating the ultraviolet insulating material, so that the ultraviolet insulating material can be subjected to operation conditions which are similar to and worse than those in the process of producing the electric wire, and the ultraviolet insulating material subjected to the steps is made into a test piece, and is treated and tested, so that the defects caused by a single batch of material can be avoided.
And fourthly, the insulation elongation at break shows the trend of ascending first and then descending in the production speed of the electric wire from 80m/min to 120m/min, and the minimum value of the elongation at break is more than 120 percent, namely the elongation at break meets the use requirement of the electric wire after the electric wire is produced into a product from raw materials.
The foregoing is directed to the preferred embodiment of the present invention, and it is understood that various changes and modifications may be made by one skilled in the art without departing from the spirit of the invention, and it is intended that such changes and modifications be considered as within the scope of the invention.
Claims (10)
1. A manufacturing method of a low-smoke halogen-free electric wire is characterized by comprising the following steps:
s1: selecting an ultraviolet light insulating material;
s2: pre-drying the ultraviolet light insulating material;
s3: sampling the ultraviolet light insulating material, plasticizing the obtained sample, forming a test piece by adopting a compression molding method, and carrying out ultraviolet light irradiation crosslinking processing on the test piece for testing;
s4: when the test piece is qualified, setting processing parameters of processing equipment;
s5: plasticizing the ultraviolet light insulating material, extruding the plasticized ultraviolet light insulating material to manufacture an electric wire, and carrying out ultraviolet light irradiation crosslinking at a preset temperature.
2. The manufacturing method of the low-smoke zero-halogen wire according to claim 1, wherein the ultraviolet light insulating material is polyolefin.
3. The manufacturing method of the low-smoke zero-halogen wire according to claim 1, characterized in that the material is pre-dried at 80 ℃ ± 5 ℃ for more than 2 hours.
4. The manufacturing method of the low-smoke zero-halogen wire according to claim 1, characterized in that the ultraviolet light insulating material is extruded by an extruder, and the actual temperature of each area in the extruder is controlled within +/-5 ℃ of the set temperature of the extruder.
5. The manufacturing method of the low smoke zero halogen wire according to claim 1, wherein the plasticizing temperature of the ultraviolet light insulating material is 150-155 ℃, the ultraviolet light insulating material is pressurized and heated for 4min after being preheated for 6min in an environment of 150-160 ℃ without pressurization, and then is pressurized and cooled to room temperature, and the pressure applied to the ultraviolet light insulating material in the pressurizing process is more than 15 MPa.
6. The manufacturing method of the low smoke zero halogen electric wire according to claim 5, wherein the thickness of the test piece is 1.0mm ± 0.1 mm.
7. The method for manufacturing a low smoke zero halogen wire according to claim 1, wherein the test of the test piece includes a thermal extension test and a tensile strength test.
8. The method according to claim 7, wherein the thermal elongation test requires an elongation under load of less than 70% and a permanent set after cooling of less than 15%.
9. The manufacturing method of the low-smoke halogen-free electric wire according to claim 7, wherein the tensile strength test requires that the tensile strength is greater than 10.0Mpa, and the elongation at break is greater than 150%.
10. The manufacturing method of the low smoke zero halogen electric wire according to claim 7, characterized in that the ultraviolet light insulation material is processed by ultraviolet light irradiation crosslinking through ultraviolet light irradiation equipment, the actual processing power of the ultraviolet light irradiation equipment is 80% -100% of the highest power of the ultraviolet light irradiation equipment, in the ultraviolet light irradiation processing process, the vibration amplitude of the electric wire is less than 20mm, and the moving speed of the electric wire is less than 140 m/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210547693.0A CN114974732A (en) | 2022-05-19 | 2022-05-19 | Manufacturing method of low-smoke halogen-free electric wire |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210547693.0A CN114974732A (en) | 2022-05-19 | 2022-05-19 | Manufacturing method of low-smoke halogen-free electric wire |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102898769A (en) * | 2012-10-11 | 2013-01-30 | 江苏鼎启钟华新型材料科技有限公司 | Thermoplastic elastomer (TPE) composition for electric wires and cables based on phosphorus and nitrogen composite flame retardant system |
| CN106751360A (en) * | 2016-12-02 | 2017-05-31 | 新疆天利高新石化股份有限公司 | A kind of electric wire cloudy surface halogen-free flame-retardant thermoplastic elastomer high and preparation method thereof |
| CN108492914A (en) * | 2018-03-13 | 2018-09-04 | 远东电缆有限公司 | A kind of new-energy automobile low-smoke non-halogen flame-retardant high-voltage flexible cable and production technology |
| CN109585061A (en) * | 2018-12-26 | 2019-04-05 | 远东电缆有限公司 | New-energy automobile aluminium alloy cable and its production technology |
-
2022
- 2022-05-19 CN CN202210547693.0A patent/CN114974732A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102898769A (en) * | 2012-10-11 | 2013-01-30 | 江苏鼎启钟华新型材料科技有限公司 | Thermoplastic elastomer (TPE) composition for electric wires and cables based on phosphorus and nitrogen composite flame retardant system |
| CN106751360A (en) * | 2016-12-02 | 2017-05-31 | 新疆天利高新石化股份有限公司 | A kind of electric wire cloudy surface halogen-free flame-retardant thermoplastic elastomer high and preparation method thereof |
| CN108492914A (en) * | 2018-03-13 | 2018-09-04 | 远东电缆有限公司 | A kind of new-energy automobile low-smoke non-halogen flame-retardant high-voltage flexible cable and production technology |
| CN109585061A (en) * | 2018-12-26 | 2019-04-05 | 远东电缆有限公司 | New-energy automobile aluminium alloy cable and its production technology |
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Application publication date: 20220830 |