CN119092211A - A high-adhesion equipment cable and manufacturing method thereof - Google Patents
A high-adhesion equipment cable and manufacturing method thereof Download PDFInfo
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- CN119092211A CN119092211A CN202411291862.4A CN202411291862A CN119092211A CN 119092211 A CN119092211 A CN 119092211A CN 202411291862 A CN202411291862 A CN 202411291862A CN 119092211 A CN119092211 A CN 119092211A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 239000004020 conductor Substances 0.000 claims abstract description 113
- 238000009413 insulation Methods 0.000 claims abstract description 67
- 238000001125 extrusion Methods 0.000 claims abstract description 63
- 238000000034 method Methods 0.000 claims abstract description 46
- 230000008569 process Effects 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 14
- 229920000098 polyolefin Polymers 0.000 claims description 5
- 239000004698 Polyethylene Substances 0.000 claims description 4
- -1 polyethylene Polymers 0.000 claims description 4
- 229920000573 polyethylene Polymers 0.000 claims description 4
- 229920001169 thermoplastic Polymers 0.000 claims description 3
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 3
- 229920001187 thermosetting polymer Polymers 0.000 claims description 3
- 239000010410 layer Substances 0.000 description 24
- 239000000853 adhesive Substances 0.000 description 22
- 230000001070 adhesive effect Effects 0.000 description 22
- 239000011810 insulating material Substances 0.000 description 15
- 229920000915 polyvinyl chloride Polymers 0.000 description 6
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- 238000005429 filling process Methods 0.000 description 2
- 239000012774 insulation material Substances 0.000 description 2
- 239000004416 thermosoftening plastic Substances 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
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Classifications
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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
- H01B13/02—Stranding-up
- H01B13/0207—Details; Auxiliary devices
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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
-
- 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
- H01B13/14—Insulating conductors or cables by extrusion
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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
- H01B13/14—Insulating conductors or cables by extrusion
- H01B13/145—Pretreatment or after-treatment
-
- 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
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1875—Multi-layer sheaths
- H01B7/188—Inter-layer adherence promoting means
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacturing Of Electric Cables (AREA)
Abstract
本发明公开了一种高附着力装备线缆及其制造方法，属于装备电缆技术领域。该方法如下：多个导体子单元进行束绞形成导体子单元束，导体子单元束采用退扭式绞合进行多层复绞制得导体，其中，导体子单元的股数不小于7，所述导体子单元的节径比不小于16倍；绝缘前对导体进行预热，后采用挤压式挤出绝缘，绝缘均匀包覆在导体上形成绝缘单线；多股绝缘单线排列绞合，形成缆芯；采用半挤压方式挤出护套，在缆芯的外部形成护套，制得高附着力装备线缆。上述制造方法提升装备线缆绝缘层及护套层附着力，以解决现有装备线缆绝缘容易出现锁芯和护套容易出现松套的不良现象。
The present invention discloses a high-adhesion equipment cable and a manufacturing method thereof, and belongs to the technical field of equipment cables. The method is as follows: a plurality of conductor sub-units are bundled and twisted to form a conductor sub-unit bundle, and the conductor sub-unit bundle is twisted by back-twisting to obtain a conductor by multi-layer multiple twisting, wherein the number of strands of the conductor sub-unit is not less than 7, and the pitch-diameter ratio of the conductor sub-unit is not less than 16 times; the conductor is preheated before insulation, and then extruded insulation is extruded, and the insulation is evenly coated on the conductor to form an insulating single wire; multiple strands of insulating single wires are arranged and twisted to form a cable core; a semi-extrusion method is used to extrude a sheath to form a sheath on the outside of the cable core to obtain a high-adhesion equipment cable. The above-mentioned manufacturing method improves the adhesion of the insulation layer and the sheath layer of the equipment cable to solve the undesirable phenomenon that the insulation of the existing equipment cable is prone to locking the core and the sheath is prone to loosening.
Description
Technical Field
The invention belongs to the technical field of equipment cables, and particularly relates to a high-adhesion equipment cable and a manufacturing method thereof.
Background
In recent years, with increasing requirements of an electric power system for efficient, stable and safe operation, an equipment cable is taken as a key component for power transmission and signal control, and performance optimization of the equipment cable is particularly important. However, in practical applications, the existing equipment cable faces many challenges, in which the insulating layer is prone to the lock core phenomenon (that is, the insulating material has internal defects caused by uneven pressure distribution or material characteristics in the extrusion process, which affect the insulating effect), and the sheath layer often has loose sleeve problem (the sheath material fails to closely adhere to the cable core, resulting in weakening the protecting effect, and possibly even causing external damage). These problems not only reduce the durability and service life of the cable, but also pose a potential threat to the overall reliability, stability and safety of the electrical system.
Therefore, improving the adhesion of the insulation layer and the sheath layer of the equipment cable becomes a key technical problem to be solved urgently.
Disclosure of Invention
In order to overcome the defects of the prior art, the invention aims to provide a high-adhesion equipment cable and a manufacturing method thereof, which can improve the adhesion of an insulation layer and a sheath layer of the equipment cable so as to solve the problem that the insulation of the existing equipment cable is easy to cause the phenomenon that a lock cylinder and a sheath are easy to loose.
In order to achieve the above purpose, the invention is realized by adopting the following technical scheme:
The invention provides a manufacturing method of a high-adhesion equipment cable, which comprises the following steps:
The method comprises the steps of carrying out bundle twisting on a plurality of conductor subunits to form a conductor subunit bundle, carrying out multilayer multi-twisting on the conductor subunit bundle by adopting back twist twisting to obtain a conductor, wherein the number of strands of the conductor subunits is not less than 7, the pitch diameter ratio of the conductor subunits is not less than 16 times, preheating the conductor before insulation, extruding the insulation by adopting extrusion, uniformly coating the insulation on the conductor to form an insulating single wire, arranging and twisting the multi-strand insulating single wire to form a cable core, extruding a sheath by adopting a semi-extrusion mode, and forming the sheath outside the cable core to obtain the high-adhesion equipment cable.
In one embodiment, the parameters of the extrusion insulation die are as follows:
The wall thickness of the mold core is not higher than 1.2mm, the bearing diameter in the mold sleeve is not smaller than 4mm, the angle difference between the inner cone angle of the mold sleeve and the outer cone angle of the mold core is not smaller than 15 degrees, the inner diameter of the mold sleeve is smaller than 0.1-0.2mm of the outer diameter of the finished product, and the mold spacing is 1-3mm.
In one embodiment, in the process of arranging and twisting the multi-strand insulating single wires, the deviation of the filling outer diameter of the multi-strand is not more than 10%, and the deviation of the paying-off tension of the cage twisting device is +/-5N.
In one embodiment, the parameters of the die in the extrusion sheath are as follows:
The inner diameter of the mold core is not more than 1.2mm larger than the outer diameter of the cable core, the bearing length of the outer diameter of the mold core is not more than 6mm, the bearing diameter of the inner diameter of the mold sleeve is not more than 10mm, and the mold spacing is 3-5mm.
In one embodiment, the temperature of the preheating is not less than 120 ℃.
In one embodiment, the preheating mode is non-contact preheating.
In one embodiment, during the non-contact preheating, the distance between the preheating outlet and the extrusion-insulated extruder head is controlled to be no more than 1m.
The invention also provides a high-adhesion equipment cable manufactured by the manufacturing method, which comprises a conductor, insulation, a cable core and a sheath, wherein the conductor is formed by bundling and multi-layer multi-stranding of a plurality of conductor subunits, the number of strands of the conductor subunits is not less than 7, the pitch diameter ratio of the conductor subunits is not less than 16 times, the insulation is wrapped outside the conductor to form an insulation single wire, the plurality of insulation single wires are arranged and stranded to form the cable core, and the sheath is arranged outside the cable core.
In one embodiment, the insulating material is a thermoplastic or a thermoset.
In an embodiment, the material of the sheath is any one of polyvinyl chloride, polyolefin, polyethylene and TPE.
Compared with the prior art, the invention has the following beneficial effects:
The invention provides a manufacturing method of a high-adhesion equipment cable, which sequentially comprises the procedures of conductor twisting, insulating extrusion, cabling twisting, outer sheath extrusion and the like, wherein a conductor structure is designed to be a back-twist concentric twisted structure, the number of the strands is more, the twisting pitch is larger, and extrusion pressure is easier to infiltrate into gaps of twisted conductors in the insulating extrusion process, so that the insulating adhesion is improved. Before insulating extrusion, a certain distance is adopted to preheat the conductor at a proper temperature, so that on one hand, the temperature difference between the preheated conductor and the insulating material is reduced, the problem of insulation adhesion drop caused by rapid cooling of the insulating material when the insulating material contacts with a cold conductor is avoided, and on the other hand, the preheating can improve the crystallization state of the insulating material, eliminate residual stress and improve the insulation adhesion. The insulation extrusion mode is designed into extrusion type, so that extrusion pressure is effectively improved compared with other extrusion modes, and insulation adhesive force is enhanced. The stranding adopts multi-strand filling, different filling processes are designed according to different specifications, meanwhile, paying-off tension is uniform, tension among all insulating single wires is balanced, the positions are not deformed in the arranging and stranding process, the stranding of the cable core is round, and the adhesive force of the sheath layer is improved. The sheath extrusion design is half extrusion, combines industry equipment cable automatic peeling equipment, needs to guarantee certain adhesive force, and when guaranteeing that the cable core is round, adopts half extrusion mode existing extrusion tube formula production efficiency high advantage, makes the sheath cladding inseparabler again simultaneously.
Furthermore, the wall thickness of the mold core of the mold is not more than 1.2mm in the extrusion insulation process, so that abrupt change of plastic flow caused by vortex formation of the end face is avoided, and extrusion pressure fluctuation is caused. The angle difference between the inner cone angle of the die sleeve and the outer cone angle of the die core is not too small, which is favorable for extrusion coating. The inner diameter of the die sleeve is smaller, the extrusion adhesive layer is tighter, a certain die spacing is ensured, the extrusion pressure is effectively controlled, and the insulation adhesive force is comprehensively improved.
Furthermore, the mold core of the mold in the sheath extruding process is not suitable to be larger than the cable core, so that the sheath is not easy to eccentric in the sheath extruding process. The mold core is spaced from the mold sleeve at a certain distance, the proper length of the inner diameter of the mold sleeve is ensured, the extrusion pressure of the plastic layer is effectively increased, and the adhesive force of the sheath is comprehensively improved.
Drawings
Fig. 1 is a schematic structural diagram of a high adhesion equipment cable according to the present invention.
Wherein, the cable comprises a 1-conductor, a 2-insulation, a 3-cable core and a 4-sheath.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The embodiment provides a manufacturing method of a high-adhesion equipment cable, which sequentially comprises the steps of conductor 1 twisting, insulation 2 extrusion, cable twisting to form a cable core 3, extrusion of an outer sheath 4 and the like, wherein the conductor twisting step comprises conductor subunit bunching and multilayer multi-twisting steps, the conductor 1 is formed after the twisting is completed, the conductor 1 is preheated before the insulation 2 extrusion, the insulation 2 extrusion step is used for extruding the insulation 2 outside the conductor 1 to form insulating single wires, the cable twisting step is used for twisting a plurality of insulating single wires according to a certain regular arrangement to form the cable core 3, the sheath 4 is extruded after the cable twisting step, and the sheath material is extruded to obtain the high-adhesion equipment cable.
In one embodiment, a method for manufacturing a high adhesion equipment cable is provided, comprising the steps of:
S1, carrying out bundle twisting on a plurality of conductor subunits to form a conductor subunit bundle, and carrying out multilayer re-twisting on the conductor subunit bundle by adopting back-twist twisting to obtain a conductor 1, wherein the number of strands of the conductor subunits is not less than 7, the pitch diameter ratio of the conductor subunits is not less than 16 times, the structural design number of strands of the conductor 1 is not less than 7 in the conductor 1 twisting process, back-twist twisting is adopted, and the pitch diameter ratio is not less than 16 times. The conductor 1 adopts a back-twist concentric twisted structure, the strand number design is more (not less than 7 strands), and the twisted pitch diameter ratio is large (not less than 16 times). The structure reduces the stress concentration in the conductor 1, avoids the lock core phenomenon, ensures that the insulating material is easier to infiltrate into the stranded gap in the extrusion process, and improves the adhesive force between the insulating layer and the conductor 1. The overall strength and stability of the conductor 1 are further enhanced by multilayer multi-lay, providing a good basis for subsequent extrusion and cabling of the insulation 2.
S2, preheating the conductor 1 before the insulation 2, extruding the insulation 2 by adopting extrusion, uniformly coating the insulation 2 on the conductor 1 to form an insulation single wire, and carrying out non-contact preheating on the conductor 1 before the insulation 2 is extruded, wherein the preheating temperature is not lower than 120 ℃, and the distance between a preheating outlet and an extruder head is not more than 1m. Preheating reduces the temperature difference between the conductor 1 and the insulating material and avoids the problem of reduced adhesion caused by rapid cooling of the insulating material when it contacts the cold conductor. Meanwhile, preheating improves the crystallization state of the insulating material, eliminates residual stress and further improves the adhesive force. Compared with other extrusion modes, the extrusion pressure can be effectively increased by adopting the extrusion mode, so that the insulating material is tightly coated on the conductor 1, and the insulating adhesive force is enhanced. By accurately controlling parameters such as the wall thickness of the mold core, the bearing diameter in the mold sleeve, the angle difference between the inner cone angle of the mold sleeve and the outer cone angle of the mold core, the inner diameter of the mold sleeve, the mold spacing and the like, the uniformity and the stability of extrusion of the insulating layer are ensured, and the insulating adhesive force is further improved.
S3, arranging and twisting the multi-strand insulating single wires to form a cable core 3, designing a multi-strand filling process according to the section of the core wire and the size of a gap in the cable forming and twisting process, wherein the deviation of the multi-strand filling outer diameter is not more than 10%, and the paying-off tension deviation of cage twisting equipment is +/-5N. The deviation of the outer diameter of multi-strand filling and the deviation of the paying-off tension of the cage twisting equipment are strictly controlled, the twisting roundness is ensured, and a good foundation is provided for extrusion of a sheath layer.
And S4, extruding the sheath 4 in a semi-extrusion mode, and forming the sheath 4 outside the cable core 3 to obtain the high-adhesion equipped cable. The sheath 4 is extruded in a semi-extrusion mode, so that the advantage of high production efficiency of the extruded tube is maintained, the sheath 4 is tightly coated, and the adhesive force of the sheath 4 is improved. By accurately controlling parameters such as the inner diameter of the mold core, the outer diameter bearing length of the mold core, the inner diameter bearing of the mold sleeve, the mold spacing and the like, the uniformity and the stability of extrusion of the sheath layer are ensured, and the adhesive force of the sheath is further improved.
As shown in fig. 1, the embodiment further provides a high-adhesion equipped cable manufactured according to the manufacturing method, which comprises a conductor 1, an insulation 2, a cable core 3 and a sheath 4, wherein the conductor 1 is formed by bundling and multi-layer bundling of a plurality of conductor subunits, the number of strands of the conductor subunits is not less than 7, the pitch diameter ratio of the conductor subunits is not less than 16 times, the insulation 2 is wrapped outside the conductor 1 to form an insulation single wire, the plurality of insulation single wires are arranged and stranded to form the cable core 3, and the sheath 4 is arranged outside the cable core 3.
Preferably, the material of the insulation 2 is thermoplastic or thermosetting plastic, and the material of the sheath 4 is any one of polyvinyl chloride, polyolefin, polyethylene and TPE.
In another embodiment, a method for manufacturing a high-adhesion equipped cable is provided, which sequentially comprises the steps of twisting a conductor 1, extruding insulation 2, forming a cable core 3 formed by twisting the cable, extruding an outer sheath 4 and the like from inside to outside.
The method comprises the following specific steps:
The first step of twisting the conductor 1 is to design the structure of the conductor 1, wherein the number of structural design strands of the conductor 1 is not less than 7, the back-twist twisting is adopted, the pitch diameter ratio is not less than 16 times, and the back-twist twisting mode is adopted, so that the twisting stress of the conductor 1 in the twisting process can be reduced, and the structure of the conductor 1 is more uniform and compact. Meanwhile, the design that the pitch diameter ratio is not less than 16 times is beneficial to increasing gaps among the stranded conductors 1, so that extrusion pressure in the subsequent insulation extrusion process is easier to permeate into the gaps, and the adhesive force between the insulation material and the conductors is enhanced. The structural design number of the conductor 1 is not less than 7, so that the strength and the stability of the conductor 1 are improved, and the adhesive force of the insulating layer is improved, because more strands mean more contact points, the even distribution and the tight coating of the insulating material are facilitated.
And secondly, preheating the conductor 1, namely preheating the conductor 1 in a non-contact way before extruding the insulation 2, wherein the preheating temperature is not lower than 120 ℃, the distance between a preheating outlet and a machine head is not more than 1m, and the non-contact preheating mode is adopted, so that the damage or oxidation of the surface of the conductor 1 caused by direct contact with a heat source can be avoided, and the preheating temperature is ensured to be uniformly distributed on the whole conductor 1. The preheating temperature is not lower than 120 ℃, the initial temperature of the conductor 1 can be effectively increased, the temperature difference between the conductor 1 and the insulating material extruded subsequently is reduced, and the problem of adhesive force reduction caused by rapid cooling of the insulating material when the insulating material contacts the cold conductor 1 is avoided. The distance between the preheating outlet and the machine head is not more than 1m, so that the preheated conductor 1 can enter the insulating extrusion process rapidly, and a higher temperature state is maintained.
The insulation 2 extrusion is carried out, wherein the thickness of the mold core is not higher than 1.2mm, the bearing diameter in the mold sleeve is not smaller than 4mm, the angle difference between the inner taper angle of the mold sleeve and the outer taper angle of the mold core is not smaller than 15 degrees, the inner diameter of the mold sleeve is smaller than 0.1-0.2mm of the outer diameter of a finished product, the mold spacing is 1-3mm, and compared with other extrusion modes (such as blow molding, injection molding and the like), the extrusion pressure can be effectively improved by adopting the extrusion mode, so that the insulation material is tightly coated on the surface of the conductor 1 under high pressure, and the insulation adhesive force is enhanced. The wall thickness of the die core is not higher than 1.2mm, plastic flow mutation and extrusion pressure fluctuation caused by vortex formation on the end face are avoided, the angle difference between the inner cone angle of the die sleeve and the outer cone angle of the die core is not lower than 15 degrees, extrusion coating is more compact, the inner diameter of the die sleeve is smaller than the outer diameter of a finished product by 0.1-0.2mm, the compact and uniform extrusion adhesive layer is ensured, the die spacing is 1-3mm, the extrusion pressure is effectively controlled, and the integral quality of an insulating layer is improved.
And fourthly, cabling and twisting to form a cable core 3, wherein the deviation of the multi-strand filling outer diameter is not more than 10% according to the section and the gap size of the core wire, the paying-off tension deviation of cage twisting equipment is +/-5N, the twisting roundness is cooperatively improved, the adhesion force of the post-process is improved, the multi-strand filling is carried out according to the section and the gap size of the core wire, the deviation of the filling outer diameter is not more than 10%, and the roundness and the stability of the cable core are improved. Meanwhile, the paying-off tension deviation of the cage twisting equipment is controlled within +/-5N, tension balance among all insulating single wires is kept, position deformation in the arrangement twisting process is reduced, the twisting of the cable core 3 is enabled to be round, and the tight cladding and adhesive force improvement of a subsequent sheath layer are facilitated.
Extruding a layer of sheath materials such as polyvinyl chloride, polyolefin, polyethylene, butadiene acrylonitrile elastomer and the like outside the cable core 3 by adopting a semi-extrusion mode, wherein the inner diameter of a mold core is larger than the outer diameter of the cable core and is not more than 1.2mm, the bearing diameter length of the outer diameter of the mold core is not more than 6mm, the bearing diameter in the mold sleeve is not more than 10mm, and the mold spacing is 3-5mm. The sheath material is extruded in a semi-extrusion mode, so that the advantage of high production efficiency of the extruded tube is maintained, and the sheath 4 is tightly coated. The extrusion mode is favorable for forming a uniform and compact sheath layer on the surface of the cable core 3, and the overall protective performance and adhesive force of the cable are improved. The inner diameter of the mold core is not more than 1.2mm larger than the outer diameter of the cable core, the eccentric phenomenon is avoided when the sheath 4 is extruded, the bearing diameter length outside the mold core and the bearing diameter inside the mold sleeve are strictly controlled (respectively not more than 6mm and 10 mm), and the reasonable setting of the mold spacing (3-5 mm) is beneficial to improving the stability and quality of the sheath extrusion, and the adhesive force of the sheath layer is further enhanced.
In a specific embodiment, a method for manufacturing a high-adhesion equipped cable is provided, which sequentially comprises the steps of twisting a conductor 1, extruding insulation 2, forming a cable core 3 formed by twisting the cable, extruding an outer sheath 4 and the like from inside to outside.
The method comprises the following specific steps:
Designing a structure of the conductor 1, wherein the structural design stock number of the conductor 1 is 7, the back twist type twisting is adopted, and the pitch diameter ratio is 16 times;
preheating the conductor 1, namely preheating the conductor 1 in a non-contact mode before extrusion of the insulation 2, wherein the preheating temperature is 120 ℃, and the distance between a preheating outlet and a machine head is 1m;
Step three, extruding the insulation 2, namely extruding the insulation 2, wherein the wall thickness of a die core is 1.2mm, the bearing diameter in a die sleeve is 4mm, and the angle difference between the inner cone angle of the die sleeve and the outer cone angle of the die core is 15 degrees;
Forming a cable core 3 by twisting the cable, wherein the deviation of the multi-strand filling outer diameter is 10 percent according to the section of a core wire and the size of a gap, and the paying-off tension deviation of cage twisting equipment is +/-5N, so that the twisting roundness is cooperatively improved, and the adhesive force of a following procedure is improved;
Extruding the sheath 4, namely extruding a layer of polyvinyl chloride sheath material outside the cable core 3 in a semi-extrusion mode, wherein the inner diameter of the mold core is larger than the outer diameter of the cable core by 0.1mm, the bearing diameter length of the outer diameter of the mold core is 6mm, the bearing diameter in the mold sleeve is 10mm, and the mold spacing is 3mm.
In a specific embodiment, a method for manufacturing a high-adhesion equipped cable is provided, which sequentially comprises the steps of twisting a conductor 1, extruding insulation 2, forming a cable core 3 formed by twisting the cable, extruding an outer sheath 4 and the like from inside to outside.
The method comprises the following specific steps:
Designing a structure of the conductor 1, wherein the structural design stock number of the conductor 1 is 7, the back twist type twisting is adopted, and the pitch diameter ratio is 16 times;
preheating the conductor 1, namely preheating the conductor 1 in a non-contact mode before extrusion of the insulation 2, wherein the preheating temperature is 120 ℃, and the distance between a preheating outlet and a machine head is 1m;
Step three, extruding the insulation 2, namely extruding the insulation 2, wherein the wall thickness of a die core is 1.2mm, the bearing diameter in a die sleeve is 4mm, and the angle difference between the inner cone angle of the die sleeve and the outer cone angle of the die core is 15 degrees;
Forming a cable core 3 by twisting the cable, wherein the deviation of the multi-strand filling outer diameter is 10 percent according to the section of a core wire and the size of a gap, and the paying-off tension deviation of cage twisting equipment is +/-5N, so that the twisting roundness is cooperatively improved, and the adhesive force of a following procedure is improved;
extruding the sheath 4, namely extruding a layer of polyvinyl chloride sheath material outside the cable core 3 in a semi-extrusion mode, wherein the inner diameter of the mold core is larger than the outer diameter of the cable core by 0.1mm, the bearing diameter length outside the mold core is 6mm, the bearing diameter inside the mold sleeve is 10mm, and the mold spacing is 5mm.
In a specific embodiment, a method for manufacturing a high-adhesion equipped cable is provided, which sequentially comprises the steps of twisting a conductor 1, extruding insulation 2, forming a cable core 3 formed by twisting the cable, extruding an outer sheath 4 and the like from inside to outside.
The method comprises the following specific steps:
designing a structure of the conductor 1, wherein the number of structural design strands of the conductor 1 is 9, the back twist type twisting is adopted, and the pitch diameter ratio is 18 times;
Preheating the conductor 1, namely preheating the conductor 1 in a non-contact mode before extrusion of the insulation 2, wherein the preheating temperature is 125 ℃, and the distance between a preheating outlet and a machine head is 0.8m;
step three, extruding the insulation 2, namely extruding the insulation 2, wherein the wall thickness of a die core is 1.0mm, the bearing diameter in a die sleeve is 5mm, and the angle difference between the inner cone angle of the die sleeve and the outer cone angle of the die core is 17 degrees;
forming a cable core 3 by twisting the cable, wherein the deviation of the multi-strand filling outer diameter is 5 percent according to the section of a core wire and the size of a gap, and the deviation of paying-off tension of cage twisting equipment is +/-3N, so that the twisting roundness is cooperatively improved, and the adhesive force of a following procedure is improved;
extruding the sheath 4, namely extruding a layer of polyvinyl chloride sheath material outside the cable core 3 in a semi-extrusion mode, wherein the inner diameter of the mold core is larger than the outer diameter of the cable core by 0.8mm, the outer bearing diameter length of the mold core is 5mm, the inner bearing diameter of the mold sleeve is 8mm, and the mold spacing is 4mm.
In another specific embodiment, a method for manufacturing a high-adhesion equipped cable is provided, which sequentially comprises the steps of twisting a conductor 1, extruding insulation 2, forming a cable core 3 formed by twisting the cable, extruding an outer sheath 4 and the like from inside to outside.
The method comprises the following specific steps:
designing a structure of the conductor 1, wherein the number of structural design strands of the conductor 1 is 11, and the twisted conductor 1 is twisted in a back-twist mode, and the pitch diameter ratio is 20 times;
Preheating the conductor 1, namely preheating the conductor 1 in a non-contact mode before extrusion of the insulation 2, wherein the preheating temperature is 130 ℃, and the distance between a preheating outlet and a machine head is 0.9m;
Step three, extruding the insulation 2, namely extruding the insulation 2, wherein the wall thickness of a die core is 1.1mm, the bearing diameter in a die sleeve is 6mm, and the angle difference between the inner cone angle of the die sleeve and the outer cone angle of the die core is 18 degrees;
forming a cable core 3 by twisting the cable, wherein the deviation of the multi-strand filling outer diameter is 7% according to the section of a core wire and the size of a gap, and the deviation of paying-off tension of cage twisting equipment is +/-4N, so that the twisting roundness is cooperatively improved, and the adhesive force of a following procedure is improved;
Extruding a layer of polyolefin sheath material outside the cable core 3, extruding in a semi-extrusion mode, wherein the inner diameter of the mold core is larger than the outer diameter of the cable core by 1.0mm, the outer bearing diameter length of the mold core is 5.5mm, the inner bearing diameter of the mold sleeve is 9mm, and the mold spacing is 4.5mm.
The above is only for illustrating the technical idea of the present invention, and the protection scope of the present invention is not limited by this, and any modification made on the basis of the technical scheme according to the technical idea of the present invention falls within the protection scope of the claims of the present invention.
Claims (10)
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| CN202411291862.4A CN119092211A (en) | 2024-09-14 | 2024-09-14 | A high-adhesion equipment cable and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411291862.4A CN119092211A (en) | 2024-09-14 | 2024-09-14 | A high-adhesion equipment cable and manufacturing method thereof |
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| CN202411291862.4A Pending CN119092211A (en) | 2024-09-14 | 2024-09-14 | A high-adhesion equipment cable and manufacturing method thereof |
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