CN115579194A - Method for producing a protective sheath integrating an insulating layer and a protective sheath, and use - Google Patents

Method for producing a protective sheath integrating an insulating layer and a protective sheath, and use Download PDF

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Publication number
CN115579194A
CN115579194A CN202211172445.9A CN202211172445A CN115579194A CN 115579194 A CN115579194 A CN 115579194A CN 202211172445 A CN202211172445 A CN 202211172445A CN 115579194 A CN115579194 A CN 115579194A
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China
Prior art keywords
hole
sheath
cable core
core
cable
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CN202211172445.9A
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Chinese (zh)
Inventor
裴文
凌国桢
梁福才
沙伟
袁杰
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Jiangsu Shangshang Cable Group Co Ltd
Jiangsu Shangshang Cable Group New Material Co Ltd
Original Assignee
Jiangsu Shangshang Cable Group Co Ltd
Jiangsu Shangshang Cable Group New Material Co Ltd
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Application filed by Jiangsu Shangshang Cable Group Co Ltd, Jiangsu Shangshang Cable Group New Material Co Ltd filed Critical Jiangsu Shangshang Cable Group Co Ltd
Priority to CN202211172445.9A priority Critical patent/CN115579194A/en
Publication of CN115579194A publication Critical patent/CN115579194A/en
Pending legal-status Critical Current

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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
    • H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
    • 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
    • H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
    • H01B13/227—Pretreatment
    • 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)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

A method for producing a sheath integrating an insulating layer and a sheath, before processing a cable, firstly removing an isolating layer outside an insulating cable core and cleaning the isolating layer to ensure that no material capable of separating the insulating layer and the sheath exists between the insulating layer and the sheath. And (3) penetrating the insulating cable core into the first through hole of the mold core, feeding sheath materials into the extrusion channel, and drawing the cable core along the preset direction to form the sheath. The sheath is extruded from the second via hole and covers the cable core to complete the processing of the cable. Because no isolation material exists outside the insulating layer, the sheath can be well bonded on the cable core, so that a non-strippable structure of the insulating layer and the sheath is formed, and integration is further formed. Because insulation and sheath are bonded together and can not be peeled off, the whole cable is of an integrated structure, when the cable moves at a high speed, no displacement can be generated inside the cable, the phenomena of sheath layering, hollowing and the like can not occur in the operation process, and the moving speed and the service time of the cable are well improved.

Description

Method for producing a protective sheath integrating an insulating layer and a protective sheath, and use
Technical Field
The technical scheme belongs to the technical field of cables, and particularly relates to an integral production process of an insulation and sheath which can also be suitable for a high-speed moving cable.
Background
The high-speed moving cable is mostly applied to RTG (rubber-tyred gantry crane) as main equipment of a specialized container wharf yard, has the characteristics of flexible transition operation, low engineering investment and the like, and is widely applied to port wharfs. Along with the requirements of environmental protection and the like, a large amount of matched mobile cables are applied to RTG equipment, the moving speed of the cables is required to be faster and faster along with the continuous increase of the operating efficiency, and the phenomena of sheath layering, hollowing and the like are very easy to occur in the conventional sheath extrusion process along with the increase of the moving speed.
Disclosure of Invention
The main object of the present invention is to provide a method for producing a sheath integrating an insulating layer and a sheath, which is suitable not only for the production of sheaths for high-speed moving cables, but also for other types of cables with similar performance/functional requirements.
As one application of the method, the cable sheath is produced by adopting the production method, so that the finished cable can adapt to the high-speed moving working condition, and the service time of the cable is prolonged.
In order to achieve the above object, the present invention provides a method for producing a jacket integrating an insulating layer and a jacket, comprising the steps of:
s1, taking an insulated cable core 1, removing a temporary coating layer outside an insulated layer of the insulated cable core, and cleaning the surface of the insulated layer of the insulated cable core;
s2, setting structural parameters of the machine head on an extruding rubber machine for extruding sheath materials, and setting temperature parameters of the machine head:
the structural parameters of the machine head are as follows: a rubber extrusion mold core 2 and a rubber extrusion mold sleeve 3 are arranged in the machine head;
a first taper hole 201 and a first through hole 202 are formed in the rubber extrusion die core 2; the large-diameter end of the first tapered hole 201 is an inlet end of the insulated cable core, and the small-diameter end of the first tapered hole 201 is connected with the first via hole 202;
a second taper hole 301 and a second through hole 302 are formed in the rubber extrusion die sleeve 3; a thickness of the die sleeve bearing line is reserved between the large-diameter end of the second conical hole 301 and the outlet end of the first through hole 202, and the tail end of the material extrusion channel 4 is communicated with the gap; the small-diameter end of the second taper hole 301 is connected with the second through hole 302; the outlet end of the second via hole 302 is the outlet end of the handpiece;
the first tapered hole 201, the first via hole 202, the second tapered hole 301 and the second via hole 302 are coaxial to a straight line l;
the bearing line ratio is N = L/d, wherein d is the aperture of the die sleeve, L is the length of the bearing line of the die sleeve, and the value of N ranges from 0.5 to 0.7; the distance between the matched molds is 1.0 to 1.5 times of the thickness of the sheath;
the insulated cable core sequentially passes through the first tapered hole 201, the first through hole 202, the second tapered hole 301 and the second through hole 302 from back to front, and the axis of the cable core is superposed with the straight line l; in the rubber extrusion die sleeve 3, the sheath material is wrapped outside the cable core, and the sheath material is fused with the insulating material on the surface of the insulating layer of the cable core;
the temperature parameters are as follows:
heating the rubber extrusion mold core 2, and keeping the temperature in the first tapered hole 201 and the first via hole 202 to be the extrusion temperature of the sheath material;
heating the rubber extrusion die sleeve 3, and keeping the temperature in the second taper hole 301 and the second via hole 302 to be the extrusion temperature of the sheath material;
and S3, setting crosslinking parameters in the sheath crosslinking section.
Specifically, the sheathing material is a rubber sheathing material, then:
the rubber extrusion die core 2 is heated, and the temperature in the first taper hole 201 and the first through hole 202 is kept to be 65-70 ℃;
the temperature in the second taper hole 301 and the second via hole 302 is kept at 65-70 ℃ by heating the rubber extrusion die sleeve 3;
in step S3, the sheath cross-linking section is a vulcanized pipe; the temperature of saturated steam in the vulcanizing tube is 150-180 ℃, and the pressure is 0.5-1.0 MPa; the vulcanization time is 10-25 min.
The die sleeve bearing line L = 4.0-8.0 mm.
The method aims at ensuring the 'bonding' effect between the insulating material and the sheath material:
1. by removing the temporary coating layer outside the cable core, the sheath material is fully contacted with the insulating material through the extrusion channel 4 in the extrusion process, and the premise of full contact is to control the die sleeve wire to be between 4.0 and 8.0mm so as to ensure that the sheath material obtains larger extrusion force when being contacted with the insulating cable core 1 through the extrusion channel 4, so that the sheath material is full of the cable core gap and is tightly combined with the surface of the insulating cable core. At the moment, the temperature of the insulating material is lower, and the temperature of the sheath material is controlled to be about 60-70 ℃. Because the insulation is finished by crosslinking before cabling, the sheath is not vulcanized by vulcanization crosslinking of the rubber material, the sheath is discharged from the die sleeve and enters the vulcanization pipe for continuous vulcanization, and the temperature, time and pressure required by the vulcanization of the sheath are obtained by high-pressure steam. If the sheath is in other cross-linking modes, S3, the corresponding cross-linking parameters are controlled.
The temperature of saturated steam required by vulcanizing the rubber sheath is 150-180 ℃, the pressure is 0.5-1.0 MPa, the time is 10-25 min, and vulcanization factor parameters are adjusted and selected within parameter ranges along with the outer diameter of the cable core 1 and the thickness of the sheath.
Under the action of the above element parameters, the sheath starts to be vulcanized, and the vulcanization stage comprises a vulcanization induction stage (the sheath material is finished in a screw machine head), a pre-vulcanization stage and a positive vulcanization stage (the sheath material is finished in a vulcanization pipe).
The temperature of the cable core, namely the insulating material, in the vulcanizing tube can also rise, at the moment, the insulating material is in a high elastic state, the thermal motion of molecules can enable the chain segment to move freely along with the rise of the temperature, but the entanglement among the macromolecular chains hinders the slippage among the macromolecular chains, so the macromolecular chains cannot move, and the macro-scale expression shows that the performance of the insulating material is almost unchanged. Under the high elastic state, when the macromolecular compound receives external force, the molecular chain can adapt to the external force action through single-bond internal rotation and chain segment change conformation, namely, the pressure of the sheathing material on the insulating material is adapted, after the pressure is removed, the molecular chain returns to the original curling state through the single-bond internal rotation and the chain segment movement, and macroscopically shows elastic retraction, namely, the insulating appearance and the performance are almost unchanged. However, in the process of temperature rise, the viscosity of the insulating material and the viscosity of the sheath material are increased, so that the insulating material and the sheath material are more tightly combined.
2. In order to fully bond the sheath material and the insulation material melted on the surface of the insulation layer and ensure the processing quality of the sheath, enough pressure is required to be ensured when the sheath material is contacted with the insulation cable core 1, so that the sheath material can enter the cable core gap and ensure the processing quality of the sheath. To ensure the above effect, the die sleeve supporting line (the length of the die sleeve molding part and the length of the second via hole 302) and the die matching distance (the distance from the end of the die core 2 to the starting end of the die sleeve supporting line, i.e., the starting end of the second via hole 302) need to be controlled.
Length L of die sleeve bearing line: the length L of a die sleeve bearing line is expressed by a bearing line ratio N, N = L/d, wherein d is the aperture of the die sleeve, N is large, the larger the resistance borne by a jacket material during extrusion is, the tighter the extruded jacket material is, but when N is too large, the phenomenon of jacket dislocation is easily generated, the value of N is too small, the jacket is not tight, and the fluctuation of the outer diameter is large. Therefore, the N value is determined to be in the range of 0.5-0.7, so that the jacket material is ensured to be closely contacted with insulation when extruded.
Distance between matched modes: the mold matching distance is large, the larger the sheath material pressure is, the appearance is compact, the mold matching distance cannot be too large, and the phenomena of scratching and glue pouring of cable cores are easily caused due to lateral pressure. The distance between the die pairs is too small, so that the sheathing material is not tightly wrapped, and even the rubber extruding accident is easily caused by the overlarge internal pressure. Therefore, the distance between the pair of dies is 1.0 to 1.5 times of the thickness of the sheath, and the range can ensure enough extrusion force to enable the sheath material to fill the cable core gap and fully contact with the insulation material.
The method is particularly suitable for the production of the sheath of the high-speed moving cable; the insulating cable core is an insulating cable core of a high-speed moving cable.
The method is applied to the multi-core insulated cable core as follows:
the multi-core insulated cable core comprises n identical large insulated wire cores and n identical small insulated wire cores, wherein n is a natural number not less than 2;
the large insulated wire core and the small insulated wire core are sequentially arranged adjacently around the same axis and are twisted to form a cable core; filling the vacant positions in the cable cores with filling cores;
the production method of the sheath of the multi-core insulated cable core comprises the following steps:
s1, taking a cable core, removing a temporary coating layer outside the multi-core insulated cable core, and cleaning the surfaces of the insulated layers of the large insulated wire core and the small insulated wire core;
s2, setting structural parameters of the machine head, and setting temperature parameters of the machine head:
the thickness of a gap between the large-diameter end of the second conical hole 301 and the outlet end of the first through hole 202 is 4.0-8.0 mm;
the cable core sequentially passes through the first tapered hole 201, the first through hole 202, the second tapered hole 301 and the second through hole 302 from back to front, and the axis of the cable core is superposed with the straight line l; in the rubber extrusion die sleeve 3, the sheath material is wrapped outside the cable core, and the sheath material is fused with the insulating material on the surface of the insulating layer of the cable core;
the rubber extrusion die core 2 is heated, and the temperature in the first taper hole 201 and the first through hole 202 is kept to be 65-70 ℃;
the temperature in the second tapered hole 301 and the second via hole 302 is maintained at 65 to 70 ℃ by heating the rubber bushing 3.
Before the cable is processed, firstly, manually removing the isolation layer outside the cable core and cleaning the isolation layer, ensuring that no material capable of separating the insulation layer and the sheath exists between the insulation layer and the sheath, penetrating the cable core into a first through hole of a mold core, feeding the material into an extrusion channel when the cable needs to be processed, drawing the cable core along a preset direction to form the sheath, and extruding the sheath from a second through hole and coating the sheath outside the cable core to complete the processing of the cable. Because no isolation material exists outside the insulation, the sheath can be well adhered to the cable core, so that the condition that the insulation and the sheath are not peelable is formed, and integration is further formed. Because insulation and sheath are bonded together and can not be peeled off, the whole cable is in an integrated condition, when the cable moves at a high speed, no displacement can be generated inside the cable, the phenomena of sheath layering, hollowing and the like can not occur in the operation process, and the moving speed and the service time of the cable are well improved.
Drawings
FIG. 1 is a schematic axial sectional view of a rubber extrusion core and a rubber extrusion sleeve in the present embodiment;
in the figure: the rubber extrusion die core 2, the rubber extrusion die sleeve 3, the extrusion channel 4, a first taper hole 201, a first through hole 202, a second taper hole 301 and a second through hole 302.
FIG. 2 is a schematic radial cross-sectional view of a high-speed moving cable processed by the method in the embodiment;
in the figure: the cable comprises a cable core 1, a conductor 101, an insulating layer 102, a filling part 103, a wire core 104 and a sheath 5.
Detailed Description
The technical solution is further described below with reference to specific examples as follows:
a method of producing a jacket integrating an insulating layer and a jacket, comprising the steps of:
s1, taking an insulated cable core 1, removing a temporary coating layer outside an insulated layer of the insulated cable core, and cleaning the surface of the insulated layer of the insulated cable core;
s2, setting structural parameters of the machine head on an extruding rubber machine for extruding sheath materials, and setting temperature parameters of the machine head:
referring to fig. 1, the structural parameters of the handpiece are: a rubber extrusion mold core 2 and a rubber extrusion mold sleeve 3 are arranged in the machine head;
a first taper hole 201 and a first through hole 202 are formed in the rubber extrusion die core 2; the large-diameter end of the first tapered hole 201 is an insulating cable core inlet end, and the small-diameter end of the first tapered hole 201 is connected with the first via hole 202;
a second taper hole 301 and a second through hole 302 are formed in the rubber extrusion die sleeve 3; a thickness serving as a die sleeve bearing line is reserved between the large-diameter end of the second conical hole 301 and the outlet end of the first through hole 202, and the tail end of the material extrusion channel 4 is communicated with the gap; the small-diameter end of the second conical hole 301 is connected with a second through hole 302; the outlet end of the second via hole 302 is the outlet end of the handpiece;
the first tapered hole 201, the first via hole 202, the second tapered hole 301 and the second via hole 302 are coaxial to a straight line l;
the bearing line ratio is N = L/d, wherein d is the aperture of the die sleeve, L is the length of the bearing line of the die sleeve, and the value of N ranges from 0.5 to 0.7; the distance between the matched molds is 1.0 to 1.5 times of the thickness of the sheath;
the insulated cable core sequentially passes through the first tapered hole 201, the first through hole 202, the second tapered hole 301 and the second through hole 302 from back to front, and the axis of the cable core is superposed with the straight line l; in the rubber extrusion die sleeve 3, the sheath material is wrapped outside the cable core, and the sheath material is fused with the insulating material on the surface of the insulating layer of the cable core;
the temperature parameters are as follows:
heating the rubber extrusion mold core 2, and keeping the temperature in the first tapered hole 201 and the first via hole 202 to be the extrusion temperature of the sheath material;
heating the rubber extrusion die sleeve 3, and keeping the temperature in the second taper hole 301 and the second via hole 302 to be the extrusion temperature of the sheath material;
and S3, setting crosslinking parameters in the sheath crosslinking section.
Referring to fig. 2, a schematic cross-sectional view of a high-speed moving cable processed using the present method is shown. The cable comprises an insulating cable core 1 and a sheath 5, wherein the sheath 5 is sleeved outside the insulating cable core 1. The insulated cable core 1 comprises a plurality of insulated wire cores 104 and a filling part 103 arranged in the middle of the cable core. The insulated wire core 104 includes a conductor 101 and an insulating layer 102 disposed over the conductor 101. The number of the insulated wire cores 104 is 6, wherein the number of the insulated wire cores 104 is 3, the number of the insulated wire cores 104 is 6, the insulated wire cores 104 are arranged along the circumferential direction of the sheath 5 at intervals, and the filling part 103 is filled in a gap formed in the middle when the 3 large wire cores are arranged.
The application of the method in the 6-core insulated cable core is as follows:
the multi-core insulated cable core comprises 3 same large insulated wire cores and 3 same small insulated wire cores;
the large insulated wire core and the small insulated wire core are sequentially arranged adjacently around the same axis and are twisted to form a cable core; filling the vacant positions in the cable cores with filling cores;
the production method of the sheath of the 6-core insulated cable core comprises the following steps:
s1, taking a cable core, removing a temporary coating layer outside the multi-core insulated cable core, and cleaning the surfaces of the insulated layers of the large insulated wire core and the small insulated wire core;
s2, setting structural parameters of the machine head, and setting temperature parameters of the machine head:
the thickness of a gap between the large-diameter end of the second taper hole 301 and the outlet end of the first via hole 202 is 4.0-8.0 mm;
the cable core sequentially passes through the first tapered hole 201, the first through hole 202, the second tapered hole 301 and the second through hole 302 from back to front, and the axis of the cable core is superposed with the straight line l; in the rubber extrusion die sleeve 3, the sheath material is wrapped outside the cable core, and the sheath material is fused with the insulating material on the surface of the insulating layer of the cable core; the sheath material is a rubber sheath material;
the rubber extrusion die core 2 is heated, and the temperature in the first taper hole 201 and the first through hole 202 is kept to be 65-70 ℃;
the temperature in the second tapered hole 301 and the second via hole 302 is maintained at 65 to 70 ℃ by heating the rubber bushing 3.
In step S3, the sheath cross-linking section is a vulcanized pipe; the temperature of saturated steam in the vulcanizing tube is 150-180 ℃, and the pressure is 0.5-1.0 MPa; the vulcanization time is 10-25 min.
Because the insulating layer 102 and the sheath 5 are bonded together and cannot be peeled off, the whole cable is in an integrated condition, when the cable moves at a high speed, no displacement is generated inside the cable, the phenomena of sheath layering, hollowing and the like cannot occur in the operation process, and the moving speed and the service time of the cable are well improved.
In this embodiment, the orthographic projection of the first via 202 on the second via 302 is located within the second via 302, thus ensuring that the cable core 1 can pass through the second via 302 to form the jacket 5. Meanwhile, the arrangement can ensure that the extending direction of the formed sheath 5 is consistent with the extending direction of the cable core 1, and further ensures the fit degree between the sheath 5 and the cable core 1 to a great extent.
In engineering application, the number of the insulated wire cores 104 is not limited to this, and can be adjusted according to working conditions and use requirements, and optionally, the number of the insulated wire cores 104 is 8 (4 large and 4 small), and the like.
In the embodiment, the cable is an ethylene-propylene insulating rubber sheath flame-retardant flexible cable, the cable manufactured by the process has the characteristics of softness and high-speed movement, and meanwhile, the ethylene-propylene insulating and rubber sheath enable the cable to have the characteristics of flame retardance, wear resistance and the like.
While the preferred embodiments of the present invention have been illustrated and described in detail, it should be understood that modifications and variations can be effected by one skilled in the art in light of the above teachings without undue experimentation. Therefore, the technical solutions available to those skilled in the art through logic analysis, reasoning and limited experiments based on the prior art according to the concept of the present invention should be within the scope of protection defined by the claims.

Claims (6)

1. A method for producing a protective cover integrating an insulating layer and a protective cover, comprising the steps of:
s1, taking an insulated cable core (1), removing a temporary coating layer outside an insulated layer of the insulated cable core, and cleaning the surface of the insulated layer of the insulated cable core;
s2, setting structural parameters of the machine head on an extruding rubber machine for extruding sheath materials, and setting temperature parameters of the machine head:
the structural parameters of the machine head are as follows: a rubber extrusion mold core (2) and a rubber extrusion mold sleeve (3) are arranged in the machine head;
a first taper hole (201) and a first through hole (202) are formed in the rubber extrusion mold core (2); the large-diameter end of the first tapered hole (201) is an inlet end of the insulated cable core, and the small-diameter end of the first tapered hole (201) is connected with the first via hole (202);
a second taper hole (301) and a second through hole (302) are formed in the rubber extrusion die sleeve (3); a thickness used as a die sleeve bearing line is reserved between the large-diameter end of the second conical hole (301) and the outlet end of the first through hole (202), and the tail end of the material extrusion channel (4) is communicated with the gap; the small-diameter end of the second conical hole (301) is connected with the second through hole (302); the outlet end of the second through hole (302) is the outlet end of the machine head;
the first conical hole (201), the first through hole (202), the second conical hole (301) and the second through hole (302) are coaxial to a straight line l;
the bearing line ratio is N = L/d, wherein d is the aperture of the die sleeve, L is the length of the bearing line of the die sleeve, and the value of N ranges from 0.5 to 0.7; the distance between the matched molds is 1.0 to 1.5 times of the thickness of the sheath;
the insulated cable core sequentially passes through the first tapered hole (201), the first through hole (202), the second tapered hole (301) and the second through hole (302) from back to front, and the axis of the cable core is superposed with the straight line l; in the rubber extrusion die sleeve (3), the sheath material is wrapped outside the cable core, and the sheath material is fused with the insulating material on the surface of the insulating layer of the cable core;
the temperature parameters are as follows:
heating the rubber extrusion mold core (2) to keep the temperature in the first tapered hole (201) and the first through hole (202) to be the extrusion temperature of the sheath material;
heating the rubber extrusion die sleeve (3) to keep the temperature in the second taper hole (301) and the second via hole (302) to be the extrusion temperature of the sheath material;
and S3, setting crosslinking parameters in the sheath crosslinking section.
2. A process for producing a sheathing with an integral insulating layer and sheathing according to claim 1, wherein said sheathing material is a rubber sheathing material such that:
the rubber extrusion mold core (2) is heated, and the temperature in the first taper hole (201) and the first through hole (202) is kept to be 65-70 ℃;
the temperature in the second taper hole (301) and the second via hole (302) is kept at 65-70 ℃ by heating the rubber extrusion die sleeve (3).
3. The method for producing a sheathing with integration of an insulating layer and a sheathing according to claim 1, wherein in step S3, the sheathing cross-linked section is vulcanized tube; the temperature of saturated steam in the vulcanizing tube is 150-180 ℃, and the pressure is 0.5-1.0 MPa; the vulcanization time is 10-25 min.
4. The method for producing a sheathing with an integral insulating layer and sheathing according to claim 1, wherein the die-set line L =4.0 to 8.0mm.
5. The method for producing a sheath integrating an insulating layer and a sheath according to claim 1, wherein the method is used for the production of a sheath for a high-speed traveling cable; the insulating cable core is an insulating cable core of a high-speed moving cable.
6. The method for producing a sheath integrating an insulating layer and a sheath as claimed in claim 1, wherein the method is applied to a multi-core insulated cable core by:
the multi-core insulated cable core comprises n identical large insulated wire cores and n identical small insulated wire cores, wherein n is a natural number not less than 2;
the large insulated wire core and the small insulated wire core are sequentially arranged adjacently around the same axis and are twisted to form a cable core; filling the vacant positions in the cable cores with filling cores;
the production method of the sheath of the multi-core insulated cable core comprises the following steps:
s1, taking a cable core, removing a temporary coating layer outside the multi-core insulated cable core, and cleaning the surfaces of the insulated layers of the large insulated wire core and the small insulated wire core;
s2, setting structural parameters of the machine head, and setting temperature parameters of the machine head:
the thickness of a gap between the large-diameter end of the second taper hole (301) and the outlet end of the first through hole (202) is 4.0-8.0 mm;
the cable core sequentially passes through the first tapered hole (201), the first through hole (202), the second tapered hole (301) and the second through hole (302) from back to front, and the axis of the cable core is superposed with the straight line l; in the rubber extrusion die sleeve (3), the sheath material is wrapped outside the cable core, and the sheath material is fused with the insulating material on the surface of the insulating layer of the cable core.
CN202211172445.9A 2022-09-26 2022-09-26 Method for producing a protective sheath integrating an insulating layer and a protective sheath, and use Pending CN115579194A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202211172445.9A CN115579194A (en) 2022-09-26 2022-09-26 Method for producing a protective sheath integrating an insulating layer and a protective sheath, and use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202211172445.9A CN115579194A (en) 2022-09-26 2022-09-26 Method for producing a protective sheath integrating an insulating layer and a protective sheath, and use

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Publication Number Publication Date
CN115579194A true CN115579194A (en) 2023-01-06

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Application Number Title Priority Date Filing Date
CN202211172445.9A Pending CN115579194A (en) 2022-09-26 2022-09-26 Method for producing a protective sheath integrating an insulating layer and a protective sheath, and use

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