CN111105903A - Insulated double-layer co-extrusion production process of cable - Google Patents
Insulated double-layer co-extrusion production process of cable Download PDFInfo
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- CN111105903A CN111105903A CN201811265121.3A CN201811265121A CN111105903A CN 111105903 A CN111105903 A CN 111105903A CN 201811265121 A CN201811265121 A CN 201811265121A CN 111105903 A CN111105903 A CN 111105903A
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- layer
- cable
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- 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
- H01B13/02—Stranding-up
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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
-
- 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
Abstract
A cable insulation double-layer co-extrusion production process comprises concentrically twisting a plurality of core wires to form a conductor core twisting layer; monitoring the outer diameter of a stranded layer of the conductor wire core; drawing one end of the conductor wire core stranded layer through a drawing machine; the tractor pulls the conductor core stranded layer to pass through an insulating layer extruding machine, and the insulating layer is extruded outside the conductor core stranded layer to form an inner core cable; c, monitoring the outer diameter of the conductor wire core stranded layer according to the thickness of the insulating layer, and adjusting to keep the outer diameter of the insulating layer unchanged; the tractor pulls the inner core cable to move, and then the inner core cable passes through the air cooling device to be cooled and shaped; coating talcum powder outside the cooled inner core cable, drawing the inner core cable coated with the talcum powder by a tractor to pass through an outer sheath extruding machine, and then extruding and wrapping an outer sheath layer to form a finished cable; and the finished cable is drawn by the tractor to pass through a water cooling device for cooling and shaping. The beneficial effects are that: the manufacturing procedures of the product are reduced, and the production efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of cable production, and particularly relates to a double-layer co-extrusion production method.
Background
At present, common single core wire and cable mostly comprises conductor, insulating layer and oversheath layer, and is a process completion in the production process, the conversion machinery that need not stop between the different processes, produce the conductor earlier, secondly crowded package insulating layer, crowded package oversheath layer at last often will spend a large amount of production turnover time, cause the loss of mass production technology and increased operation workman's amount of labour (say for example say that trade the dish utensil from top to bottom, clearance screw rod and aircraft nose when shutting down, aircraft nose heating power consumption, the production latency of repeated circulation consumes).
Disclosure of Invention
In order to solve the problems of low production efficiency and the like, the invention adopts the following technical scheme:
an insulated double-layer co-extrusion production process of a cable specifically comprises the following steps,
(a) concentrically twisting a plurality of core wires to form a conductor core twisted layer;
(b) monitoring the outer diameter of a stranded layer of the conductor wire core;
(c) drawing one end of the conductor wire core stranded layer through a drawing machine;
(d) the traction machine pulls the conductor core stranded layer to pass through an insulating layer extruding machine, the insulating layer is extruded outside the conductor core stranded layer, the extruding temperature is 160-185 ℃, and an inner core cable is formed; c, monitoring the outer diameter of the conductor wire core stranded layer according to the thickness of the insulating layer, and adjusting to keep the outer diameter of the insulating layer unchanged;
(e) the tractor pulls the inner core cable to move, and then the inner core cable passes through the air cooling device to be cooled and shaped;
(f) coating talcum powder outside the cooled inner core cable, drawing the inner core cable coated with the talcum powder by a traction machine to pass through an outer sheath extruding machine, and then extruding and wrapping an outer sheath layer at the extruding temperature of 160-185 ℃ to form a finished cable;
(g) and the finished cable is drawn by the tractor to pass through a water cooling device for cooling and shaping.
Preferably, the insulating layer extrusion adopts extrusion type matched die.
Preferably, the outer sheath layer is in a half-extrusion pipe type or extrusion pipe type matched mould.
Preferably, the tractor traction speed is kept constant in step d and step f.
Preferably, the outer diameter and appearance of the core cable of step d are monitored before step e.
Preferably, the conductor core stranded layer is composed of a plurality of core layers, and each core layer is provided with one or more core layers.
Preferably, the twisting directions of the wire cores in the two adjacent wire core layers are opposite.
The invention has the beneficial effects that:
1. the manufacturing procedures of the product are reduced, and the production efficiency is improved;
2. and material loss and process loss in the production process are reduced.
Drawings
FIG. 1 is a schematic view of the process of the present invention;
FIG. 2 is a schematic cross-sectional structure of the product of the present invention;
FIG. 3 is a schematic diagram of the extrusion die-matching principle;
FIG. 4 is a schematic diagram of the principle of die matching in tube-extruding and semi-tube-extruding.
Detailed Description
The invention is further illustrated with reference to the accompanying drawings:
an insulated double-layer co-extrusion production process of a cable specifically comprises the following steps,
(a) concentrically twisting a plurality of core wires to form a conductor core twisted layer; the conductor wire core twisting layer consists of a plurality of wire core layers, and each wire core layer is provided with one or more wire cores; the twisting directions of the wire cores in the two adjacent wire core layers are opposite;
(b) monitoring the outer diameter of a stranded layer of the conductor wire core;
(c) drawing one end of the conductor wire core stranded layer through a drawing machine;
(d) the traction machine pulls the conductor core stranded layer to pass through an insulating layer extruding machine, the insulating layer is extruded outside the conductor core stranded layer, the extruding temperature is 160-185 ℃, and an inner core cable is formed; c, monitoring the outer diameter of the conductor wire core stranded layer according to the thickness of the insulating layer, and adjusting to keep the outer diameter of the insulating layer unchanged, for example, when the outer diameter of the conductor wire core stranded layer is small, the thickness of the insulating layer is increased, wherein the specific control mode is a known technology;
(e) the tractor pulls the inner core cable to move, and then the inner core cable passes through the air cooling device to be cooled and shaped;
(f) coating talcum powder outside the cooled inner core cable, drawing the inner core cable coated with the talcum powder by a traction machine to pass through an outer sheath extruding machine, and then extruding and wrapping an outer sheath layer at the extruding temperature of 160-185 ℃ to form a finished cable;
(g) and the finished cable is drawn by the tractor to pass through a water cooling device for cooling and shaping.
The insulating layer extrusion adopts extrusion type matched molds.
The outer sheath layer adopts a half-extrusion pipe type or an extrusion pipe type matched mould.
In the steps d and f, the traction speed of the traction machine is kept unchanged.
And e, monitoring the outer diameter and the appearance of the inner core cable obtained in the step d before the step e.
The traction process is generally a continuous and complete process that the conductor wire core stranded layer is drawn by the tractor and passes through an insulating layer extruding machine, and then sequentially passes through an air cooling device for cooling, a talcum powder coating device, an outer sheath layer extruding machine and a water cooling device.
As shown in fig. 3 and 4, the extrusion die is formed by matching a non-nozzle die core and any die sleeve, and the end part of the die core is away from a sizing area of the die sleeve by a certain distance. The extrusion type mould realizes the final shaping of the product by pressure, plastics are extruded on the wire core through the annular clearance which is gradually reduced between the mould core and the mould sleeve, the extrusion pressure acts on the wire core through a melt, the extrusion pressure is large, the extrusion type mould matching is mainly to select and match the mould core according to the size of the wire core, select and match the mould sleeve according to the outer diameter of the finished product (after extrusion), and determine the structural sizes of the mould such as the angle, the angle difference, the length of a wire bearing area and the like of the mould core and the mould sleeve according to the technical characteristics of the plastics, so that the mould core and the mould sleeve are.
The semi-extruding pipe type mould is also called semi-extruding mould, and is characterized by that it uses short-nozzle mould core and any one kind of mould sleeve to make them cooperate, and the end portion of mould core nozzle is extended to about 1/2 position of mould sleeve wire-bearing zone, and the wire-bearing zone of the mould sleeve is slightly short, and the mould angle is slightly smaller, and when it is extruded, it has a certain pressure. The semi-extrusion pipe type die matching can properly enlarge the size of the die core, and combines the advantages of extrusion type die matching and extrusion pipe type die matching.
The extruding pipe type mould is composed of long nozzle mould core and any kind of mould cover, the mould core nozzle is extended to be level with or beyond the mould cover opening, before the molten plastic is extruded to form a pipe shape under the action of mould, then the pipe is coated on the wire core of the electric wire and cable by stretching, then the extruding pipe type mould is mainly based on the stretching ratio of the extruded plastic, the stretching ratio is the ratio of the circular area of the plastic at the mould opening to the circular area formed on the coated electric wire and cable, thus the aperture of the mould core mould cover can be determined according to the external diameter of the wire core to be extruded and the technological thickness of the extruding layer.
Meanwhile, the outer diameter and the appearance of the inner cable are monitored, and the judging method can be as follows: the judgment standard of the outer diameter of the insulation is that the thickness of the insulation extrusion layer and the amplification factor value (between 0.1 and 0.3) are required by the process of twisting the conductor by +2 times of the outer diameter; the outer diameter judgment standard of the sheath is the outer diameter after insulation extrusion plus 2 times of the process requirement of the thickness of the sheath extrusion plus the amplification factor value (between 0.3 and 0.5). The judgment standard of the appearance is that the plastic has uniform plasticizing color, smooth and round surface, no old glue particles and no bamboo joint loose sleeve phenomenon.
Example 1
An insulated double-layer co-extrusion production process of a cable specifically comprises the following steps,
(a) concentrically twisting a plurality of core wires to form a conductor core twisted layer;
(b) monitoring the outer diameter of a stranded layer of the conductor wire core;
(c) drawing one end of the conductor wire core stranded layer through a drawing machine;
(d) keeping the traction speed of a tractor unchanged, drawing a conductor core stranded layer of a conductor by the tractor, and extruding and wrapping an insulating layer outside the conductor core stranded layer by an insulating layer extruding machine in an extrusion type die matching mode at the extrusion temperature of 160 ℃ to form an inner core cable; c, monitoring the outer diameter of the conductor wire core stranded layer according to the thickness of the insulating layer, and adjusting to keep the outer diameter of the insulating layer unchanged;
(e) the tractor pulls the inner core cable to move, and then the inner core cable passes through the air cooling device to be cooled and shaped;
(f) coating talcum powder outside the cooled inner core cable, keeping the traction speed of a traction machine unchanged, drawing the inner core cable coated with the talcum powder by the traction machine to pass through an outer sheath extruding machine, then extruding and wrapping an outer sheath layer on the outer layer of the inner core cable coated with the talcum powder in a semi-extrusion tube type or extrusion tube type matched die mode, and forming a finished cable at the extrusion temperature of 160 ℃;
(g) and the finished cable is drawn by the tractor to pass through a water cooling device for cooling and shaping.
Example 2
An insulated double-layer co-extrusion production process of a cable specifically comprises the following steps,
(a) concentrically twisting a plurality of core wires to form a conductor core twisted layer; the conductor wire core twisting layer consists of a plurality of wire core layers, and each wire core layer is provided with one or more wire cores; the twisting directions of the wire cores in the two adjacent wire core layers are opposite;
(b) monitoring the outer diameter of a stranded layer of the conductor wire core;
(c) drawing one end of the conductor wire core stranded layer through a drawing machine;
(d) keeping the traction speed of a tractor unchanged, drawing a conductor core stranded layer of a conductor by the tractor, and extruding and wrapping an insulating layer outside the conductor core stranded layer by an insulating layer extruding machine in an extrusion type die matching mode at the extrusion temperature of 185 ℃ to form an inner core cable; c, monitoring the outer diameter of the conductor wire core stranded layer according to the thickness of the insulating layer, and adjusting to keep the outer diameter of the insulating layer unchanged;
(e) the tractor pulls the inner core cable to move, and then the inner core cable passes through the air cooling device to be cooled and shaped;
(f) coating talcum powder outside the cooled inner core cable, keeping the traction speed of a traction machine unchanged, drawing the inner core cable coated with the talcum powder by the traction machine to pass through an outer sheath extruding machine, and then extruding and wrapping an outer sheath layer on the outer layer of the inner core cable coated with the talcum powder in a semi-extrusion tube type or extrusion tube type matched die mode, wherein the extruding and wrapping temperature is 185 ℃, so as to form a finished cable;
(g) and the finished cable is drawn by the tractor to pass through a water cooling device for cooling and shaping.
Example 3
An insulated double-layer co-extrusion production process of a cable specifically comprises the following steps,
(a) concentrically twisting a plurality of core wires to form a conductor core twisted layer; the conductor wire core twisting layer consists of a plurality of wire core layers, and each wire core layer is provided with one or more wire cores; the twisting directions of the wire cores in the two adjacent wire core layers are opposite;
(b) monitoring the outer diameter of a stranded layer of the conductor wire core;
(c) drawing one end of the conductor wire core stranded layer through a drawing machine;
(d) keeping the traction speed of a tractor unchanged, drawing a conductor core stranded layer of a conductor by the tractor, and extruding and wrapping an insulating layer outside the conductor core stranded layer by an insulating layer extruding machine in an extrusion type die matching mode at the extrusion temperature of 170 ℃ to form an inner core cable; c, monitoring the outer diameter of the conductor wire core stranded layer according to the thickness of the insulating layer, and adjusting to keep the outer diameter of the insulating layer unchanged;
(e) the tractor pulls the inner core cable to move, and then the inner core cable passes through the air cooling device to be cooled and shaped;
(f) coating talcum powder outside the cooled inner core cable, keeping the traction speed of a traction machine unchanged, drawing the inner core cable coated with the talcum powder by the traction machine to pass through an outer sheath extruding machine, then extruding and wrapping an outer sheath layer on the outer layer of the inner core cable coated with the talcum powder in a semi-extrusion tube type or extrusion tube type matched die mode, and forming a finished cable at the extruding and wrapping temperature of 170 ℃;
(g) and the finished cable is drawn by the tractor to pass through a water cooling device for cooling and shaping.
In addition, the present invention is not limited to the above embodiments, and the technical effects of the present invention can be achieved by substantially the same means, which are within the scope of the present invention.
Claims (7)
1. An insulating double-layer co-extrusion production process of a cable is characterized in that: which comprises the following steps of,
concentrically twisting a plurality of core wires to form a conductor core twisted layer;
monitoring the outer diameter of a stranded layer of the conductor wire core;
drawing one end of the conductor wire core stranded layer through a drawing machine;
the traction machine pulls the conductor core stranded layer to pass through an insulating layer extruding machine, the insulating layer is extruded outside the conductor core stranded layer, the extruding temperature is 160-185 ℃, and an inner core cable is formed; c, monitoring the outer diameter of the conductor wire core stranded layer according to the thickness of the insulating layer, and adjusting to keep the outer diameter of the insulating layer unchanged;
the tractor pulls the inner core cable to move, and then the inner core cable passes through the air cooling device to be cooled and shaped;
coating talcum powder outside the cooled inner core cable, drawing the inner core cable coated with the talcum powder by a traction machine to pass through an outer sheath extruding machine, and then extruding and wrapping an outer sheath layer at the extruding temperature of 160-185 ℃ to form a finished cable;
and the finished cable is drawn by the tractor to pass through a water cooling device for cooling and shaping.
2. The insulated double-layer co-extrusion production process of the cable according to claim 1, characterized in that: the insulating layer extrusion adopts extrusion type matched molds.
3. The insulated double-layer co-extrusion production process of the cable according to claim 1, characterized in that: the outer sheath layer adopts a half-extrusion pipe type or an extrusion pipe type matched mould.
4. The insulated double-layer co-extrusion production process of the cable according to claim 1, characterized in that: in the steps d and f, the traction speed of the traction machine is kept unchanged.
5. The insulated double-layer co-extrusion production process of the cable according to claim 1, characterized in that: and e, monitoring the outer diameter and the appearance of the inner core cable obtained in the step d before the step e.
6. The insulated double-layer co-extrusion production process of the cable according to claim 1, characterized in that: the conductor wire core stranded layer is composed of a plurality of wire core layers, and each wire core layer is provided with one or more wire cores.
7. The insulated double-layer co-extrusion production process of the cable according to claim 6, characterized in that: the twisting directions of the wire cores in the two adjacent wire core layers are opposite.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811265121.3A CN111105903A (en) | 2018-10-29 | 2018-10-29 | Insulated double-layer co-extrusion production process of cable |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112951518A (en) * | 2021-02-19 | 2021-06-11 | 湖北南远电缆科技有限公司 | Environment-friendly water-blocking fire-resistant cable and production process thereof |
| CN114783692A (en) * | 2022-05-23 | 2022-07-22 | 浙江晨光电缆股份有限公司 | Cable cabling filling material injection device and injection method |
| CN114898919A (en) * | 2022-04-29 | 2022-08-12 | 江苏俊知光电通信有限公司 | Elevator traveling photoelectric hybrid cable and preparation method thereof |
| CN115148426A (en) * | 2022-08-05 | 2022-10-04 | 冯云力 | Die matching method of adjustable wire and cable extrusion die |
| CN115938686A (en) * | 2022-11-24 | 2023-04-07 | 江苏洪能电缆有限公司 | Preparation process of flame-retardant charging cable for automobile |
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| CN201111978Y (en) * | 2007-11-01 | 2008-09-10 | 四川川东电缆有限责任公司 | High-temperature resisting silicon rubber insulation and sheath cable |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112951518A (en) * | 2021-02-19 | 2021-06-11 | 湖北南远电缆科技有限公司 | Environment-friendly water-blocking fire-resistant cable and production process thereof |
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| CN114898919A (en) * | 2022-04-29 | 2022-08-12 | 江苏俊知光电通信有限公司 | Elevator traveling photoelectric hybrid cable and preparation method thereof |
| CN114898919B (en) * | 2022-04-29 | 2023-09-26 | 江苏俊知光电通信有限公司 | Elevator trailing photoelectric hybrid cable and preparation method thereof |
| CN114783692A (en) * | 2022-05-23 | 2022-07-22 | 浙江晨光电缆股份有限公司 | Cable cabling filling material injection device and injection method |
| CN114783692B (en) * | 2022-05-23 | 2022-11-11 | 浙江晨光电缆股份有限公司 | Cable cabling filling material injection device and injection method |
| CN115148426A (en) * | 2022-08-05 | 2022-10-04 | 冯云力 | Die matching method of adjustable wire and cable extrusion die |
| CN115148426B (en) * | 2022-08-05 | 2024-01-23 | 四川蓝电电缆科技有限公司 | Die matching method of adjustable wire and cable extrusion die |
| CN115938686A (en) * | 2022-11-24 | 2023-04-07 | 江苏洪能电缆有限公司 | Preparation process of flame-retardant charging cable for automobile |
| CN115938686B (en) * | 2022-11-24 | 2023-10-24 | 江苏洪能电缆有限公司 | Preparation process of flame-retardant charging cable for automobile |
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