CN110253851B - Device for inhibiting rotation in production process of cable insulation wire core - Google Patents
Device for inhibiting rotation in production process of cable insulation wire core Download PDFInfo
- Publication number
- CN110253851B CN110253851B CN201910590805.9A CN201910590805A CN110253851B CN 110253851 B CN110253851 B CN 110253851B CN 201910590805 A CN201910590805 A CN 201910590805A CN 110253851 B CN110253851 B CN 110253851B
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- China
- Prior art keywords
- guide wheel
- rubber guide
- wire core
- nut
- groups
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 17
- 230000002401 inhibitory effect Effects 0.000 title claims abstract description 9
- 238000009413 insulation Methods 0.000 title claims description 10
- 230000000712 assembly Effects 0.000 claims abstract description 11
- 238000000429 assembly Methods 0.000 claims abstract description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 37
- 239000010959 steel Substances 0.000 claims description 37
- 238000003466 welding Methods 0.000 claims description 4
- 230000001629 suppression Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 230000000452 restraining effect Effects 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/154—Coating solid articles, i.e. non-hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
-
- 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
-
- 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
- H01B13/141—Insulating conductors or cables by extrusion of two or more insulating layers
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/34—Electrical apparatus, e.g. sparking plugs or parts thereof
- B29L2031/3462—Cables
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Wire Processing (AREA)
Abstract
The invention discloses a device for inhibiting rotation in the production process of a cable insulating wire core, which comprises two groups of inclined rubber guide wheel assemblies, a rubber guide wheel inclination adjusting device and two groups of inclined rubber guide wheel interval adjusting devices. The invention has reasonable structural design, small occupied space of the whole device and simple operation, and achieves the functions of adjusting the angle of the guide wheel and clamping the wire core respectively by rotating the circular handle. When the insulated wire core passes through the inclined guide wheel, the stress is released due to the existence of the stress, and when the rubber guide wheel in the opposite direction is driven to rotate by the moving wire core, the angle force decomposed with the insulated wire core is generated due to the fact that the angle force is respectively formed by the rubber guide wheel and the wire core, the stress on the wire core is respectively restrained, the wire core is not rotated, and the effect of restraining the rotation of the wire core is achieved. The invention can well solve the rotation problem in the production process of the insulated wire core. Thereby avoiding the scrapping caused by the quality problem.
Description
Technical Field
The invention relates to a device for inhibiting rotation in the production process of an insulated wire core, in particular to a device for preventing the insulated wire core from twisting in the production process, which is used for preventing the insulated wire core from being twisted in the production process of the insulated wire core, and is characterized in that the device is used for preventing the insulated wire core from being twisted in the production process of the insulated wire core due to the fact that the stress generated by stranded wires is released in the three-layer coextrusion process to cause the eccentric and deformation of an insulating layer to cause quality problems.
Background
In the production process of the cable conductor, the conductor can generate stress along with the rotation of the axis when twisted, and can not be released, when the cable conductor is extruded and insulated, the conductor can generate rotation phenomenon along with the continuous release of the conductor, and the stress is continuously released, so that the insulation layer rotates along with the conductor, and eccentric and deformation are caused, the normal insulation layer structure is damaged, and particularly, the medium-voltage crosslinked insulation wire core is thicker in insulation layer and is easier to eccentrically deform, so that scrapping loss is caused.
If the conductor releases the rotation stress in the production process of the insulated wire core, a device always gives opposite acting force to prevent the conductor from rotating, so that the problem can be solved.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a device for inhibiting rotation in the production process of a cable insulating wire core.
The invention is realized by the following technical scheme:
The device for inhibiting the rotation in the production process of the cable insulated wire core comprises two groups of inclined rubber guide wheel assemblies, a rubber guide wheel inclination adjusting device and two groups of inclined rubber guide wheel interval adjusting devices, wherein each inclined rubber guide wheel assembly comprises an F-shaped frame, a rubber guide wheel is rotatably arranged between two horizontal plates of the F-shaped frame, and the lower ends of the F-shaped frames are parallelly connected on a strip steel plate through a movable shaft in a rotary manner to form a group of inclined rubber guide wheel assemblies; the inclination adjusting device of the rubber guide wheel is an adjusting device welded at the end part of the strip steel plate and used for driving the strip steel plate to move forwards and backwards; the two groups of inclined rubber guide wheel interval adjusting devices comprise two square frames with the same size, sliding shaft sleeves are arranged on four corners of each square frame, sliding shafts penetrate through the corresponding sliding shaft sleeves on the two square frames, through holes are formed in the centers of the lower transverse edges of the two square frames, first nut sleeves are arranged in the two through holes, first trapezoidal nuts with opposite directions are respectively arranged in the first nut sleeves, first trapezoidal nuts are screwed into the same first screw rod, a first circular handle is arranged at one end of the first screw rod, the first circular handle is rotated, the first trapezoidal nuts move in opposite directions to drive the second square frames to move in opposite directions, two groups of inclined rubber guide wheel assemblies are oppositely arranged on the inner sides of the two square frames, the upper ends of side plates of the two groups of F-shaped frames are respectively connected with the upper transverse edges of the two square frames in a rotating mode through a plurality of fixing shafts, and when the rubber guide wheel interval adjusting devices drive strip-shaped steel plates to move forwards and backwards, the F-shaped frames are driven to rotate around the fixing shafts, and accordingly inclination of the rubber guide wheels are adjusted.
The inclined direction of the rubber guide wheels of the two groups of inclined rubber guide wheel assemblies is opposite.
The rubber guide wheel is a steel guide wheel, a wear-resistant rubber layer is inlaid on the steel guide wheel, an annular groove is formed in the middle of the rubber guide wheel, bearing grooves are respectively formed in the upper end and the lower end of the rubber guide wheel, and the rubber guide wheel is fixed on two horizontal plates of the F-shaped frame through a bearing and a shaft through screws.
The inclination adjusting device for the rubber guide wheel comprises a nut sleeve II, a nut II with internal trapezoidal threads, a screw rod II and a round handle II, wherein the nut sleeve II is welded and fixed on the side surface of the end part of the strip-shaped steel plate, the nut II is arranged in the nut sleeve II, the screw rod II is screwed into the nut II, the round handle II is welded at the end part of the screw rod II, the round handle II is rotated, and the screw rod II drives the nut sleeve II and the strip-shaped steel plate to move forwards and backwards.
The device is characterized by further comprising a fixed frame, wherein the fixed frame is formed by welding square steel, and the rubber guide wheel inclination adjusting device and the two groups of inclined rubber guide wheel interval adjusting devices are arranged on the fixed frame.
The invention has the advantages that: the invention has reasonable structural design, small occupied space of the whole device and simple operation, and achieves the functions of adjusting the angle of the guide wheel and clamping the wire core respectively by rotating the circular handle. When the insulated wire core passes through the inclined guide wheel, the stress is released due to the existence of the stress, and when the rubber guide wheel in the opposite direction is driven to rotate by the moving wire core, the angle force decomposed with the insulated wire core is generated due to the fact that the angle force is respectively formed by the rubber guide wheel and the wire core, the stress on the wire core is respectively restrained, the wire core is not rotated, and the effect of restraining the rotation of the wire core is achieved.
The invention can well solve the rotation problem in the production process of the insulated wire core. Thereby avoiding the scrapping caused by the quality problem.
Drawings
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a structural diagram of an F-shaped frame and a rubber guide pulley.
FIG. 3 is a view of a rubber idler inclination adjustment apparatus.
FIG. 4 is a schematic diagram of a device for adjusting the distance between two groups of inclined rubber guide wheels.
Detailed Description
As shown in fig. 1, 2, 3 and 4, the device for inhibiting rotation in the production process of the cable insulation wire core comprises two groups of inclined rubber guide wheel assemblies, a rubber guide wheel inclination adjusting device and two groups of inclined rubber guide wheel interval adjusting devices, wherein each inclined rubber guide wheel assembly comprises an F-shaped frame 1, a rubber guide wheel 2 is rotatably arranged between two horizontal plates of the F-shaped frame 1, a first through hole 18 is formed in the upper end of a side plate of the F-shaped frame, a second through hole 19 is formed in the lower end of the side plate of the F-shaped frame, and the lower ends of the F-shaped frames 1 are connected in parallel through a movable shaft 3 in a rotating manner to form a group of inclined rubber guide wheel assemblies; the inclination adjusting device of the rubber guide wheel is an adjusting device welded at the end part of the strip steel plate 4 and used for driving the strip steel plate 4 to move forwards and backwards; the two groups of inclined rubber guide wheel interval adjusting devices comprise two square frames 5 with the same size, sliding shaft sleeves 6 are arranged on four corners of each square frame 5, sliding shafts 7 penetrate through corresponding sliding shaft sleeves 6 on the two square frames 5, through holes are formed in the centers of the lower transverse edges of the two square frames 5, nut sleeves I are arranged in the two through holes, two trapezoidal nuts 8 with opposite directions are respectively arranged in the two nut sleeves I, the two trapezoidal nuts 8 internally rotate into the same screw rod I9, a round handle I10 is arranged at one end of the screw rod I9, the round handle I10 is rotated, the two trapezoidal nuts 8 move in opposite directions to drive the two square frames 5 to move in opposite directions, the upper ends of side plates of the two groups of F-shaped frames 1 are respectively connected with the upper transverse edges of the two square frames 5 in a rotating mode through a plurality of fixing shafts, and when the rubber inclination adjusting devices drive steel plates 4 to move forwards and backwards, the F-shaped frames 1 are driven to rotate around the strip-shaped rubber fixing shafts 2, and accordingly inclination of the guide wheels are adjusted.
The inclination directions of the rubber guide wheels 2 of the two groups of inclined rubber guide wheel assemblies are opposite.
As shown in fig. 2, the rubber guide wheel 2 is a steel guide wheel with a wear-resistant rubber layer embedded therein, an annular groove 11 is arranged in the middle of the rubber guide wheel 2, bearing grooves are respectively processed at the upper end and the lower end of the rubber guide wheel 2, and the two horizontal plates are fixed on the F-shaped frame 1 by using bearings and shafts 17 through screws.
As shown in fig. 3, the inclination adjusting device for the rubber guide wheel comprises a second nut sleeve 12, a second nut 13 with internal trapezoidal threads, a second screw rod 14 and a second circular handle 15, wherein the second nut sleeve 12 is welded and fixed on the side surface of the end part of the strip steel plate 4, the second nut 13 is arranged in the second nut sleeve 12, the second screw rod 14 is screwed into the second nut 13, the second circular handle 15 is welded on the end part of the second screw rod 14, the second circular handle 15 is rotated, and the second screw rod 14 drives the second nut sleeve 12 and the strip steel plate 4 to move forwards and backwards.
As shown in fig. 1, the device further comprises a fixed frame 16, the fixed frame 16 is formed by welding square steel, and the rubber guide wheel inclination adjusting device and the two groups of inclined rubber guide wheel interval adjusting devices are arranged on the fixed frame.
When the wire core is subjected to stress release, the insulating wire core cannot be rotated, so that the wire core in the crosslinked pipeline is always free from reverse running, and the purpose of non-eccentricity is achieved.
The two groups of inclined rubber guide wheels are steel guide wheels, the wear-resistant rubber layers are inlaid on the steel guide wheels, and the middle of the steel guide wheels is provided with a shallower concave groove. Bearing grooves are formed in two ends of the steel guide wheel, and the bearing grooves and the shaft are fixed on two upper steel plates of the F-shaped frame through screws. The two groups of guide wheels are distributed oppositely, and the axial direction of the guide wheels is inclined relative to the machine surface. And the two groups of guide wheels incline in opposite directions, and each rubber guide wheel is arranged on the strip-shaped steel plate through an F-shaped frame.
The inclination adjusting device for the rubber guide wheel is formed by processing a hole in the lower section of an F-shaped frame 1, all F-shaped frames 1 are fixed on a strip steel plate 4 by shafts, a curved connecting rod is formed by the strip steel plate 4, a second nut sleeve 12 is welded on the strip steel plate, and the second nut sleeve 12 rotates by a small angle along with the forward and backward movement of the strip steel plate 4, so that a mechanism is not damaged. The nut sleeve II 12 is internally provided with a nut II 13 with trapezoidal threads, a screw II 14 is screwed on, the screw II 14 is fixed on the frame, a round handle II 15 is arranged at one end of the screw II 14, and the strip steel plate 4 moves back and forth through the rotation of the round handle II, so that the F-shaped frame rotates around the fixed shaft, and the inclination angle of the guide wheel is adjusted.
The two groups of inclined rubber guide wheel interval adjusting devices are two square frame-shaped frameworks, sliding shaft sleeves 6 are arranged on four corners of each square frame 5, the shaft sleeves 6 are made of copper bars in a turning mode, four sliding shafts 7 penetrate through the shaft sleeves of the two square frames 5, the sliding shafts 7 need to be ground, the shaft sleeves move easily, and resistance is small. Two first nut sleeves are added between the two square frames 5, two trapezoidal nuts 8 with opposite directions are arranged in the first nut sleeves, a first screw rod 9 is screwed on the first nut sleeves, a first circular handle 10 is arranged at one end of the first screw rod 9, and the first circular handle 10 rotates to enable the two square frames to move forwards and backwards, namely the rubber guide wheel moves forwards and backwards, so that an insulating wire core can be clamped.
The fixed frame 16 is a set of frames for fixing the square frame-shaped moving device, and is formed by welding square steel, and four sliding shafts are fixed on the fixed frame.
Claims (3)
1. The utility model provides a rotatory device in suppression cable insulation core production process which characterized in that: the inclined rubber guide wheel assembly comprises an F-shaped frame, rubber guide wheels are rotatably arranged between two horizontal plates of the F-shaped frame, and the lower ends of the F-shaped frames are parallelly connected to a strip-shaped steel plate through movable shafts in a rotary manner to form a group of inclined rubber guide wheel assemblies; the inclination adjusting device of the rubber guide wheel is an adjusting device welded at the end part of the strip steel plate and used for driving the strip steel plate to move forwards and backwards; the two groups of inclined rubber guide wheel interval adjusting devices comprise two square frames with the same size, sliding shaft sleeves are arranged at four corners of each square frame, sliding shafts penetrate through the corresponding sliding shaft sleeves on the two square frames, through holes are formed in the centers of the lower transverse edges of the two square frames, nut sleeves I are arranged in the two through holes, trapezoidal nuts I with opposite directions are respectively arranged in the two nut sleeves I, the two trapezoidal nuts I are screwed into the same screw rod I, a round handle I is arranged at one end of the screw rod I, the round handle I is rotated, the two trapezoidal nuts I move in opposite directions to drive the two square frames to move in opposite directions, two groups of inclined rubber guide wheel assemblies are oppositely arranged at the inner sides of the two square frames, the upper ends of side plates of the two groups of F-shaped frames are respectively connected with the upper transverse edges of the two square frames in a rotating mode through a plurality of fixing shafts, and when the rubber guide wheel interval adjusting devices drive strip steel plates to move forwards and backwards, the F-shaped frames are driven to rotate around the fixing shafts, and accordingly inclination of the rubber guide wheels are adjusted;
The inclination directions of the rubber guide wheels of the two groups of inclined rubber guide wheel assemblies are opposite;
The inclination adjusting device for the rubber guide wheel comprises a nut sleeve II, a nut II with internal trapezoidal threads, a screw rod II and a round handle II, wherein the nut sleeve II is welded and fixed on the side surface of the end part of the strip-shaped steel plate, the nut II is arranged in the nut sleeve II, the screw rod II is screwed into the nut II, the round handle II is welded at the end part of the screw rod II, the round handle II is rotated, and the screw rod II drives the nut sleeve II and the strip-shaped steel plate to move forwards and backwards.
2. A device for inhibiting rotation during production of a cable insulation core as claimed in claim 1, wherein: the rubber guide wheel is a steel guide wheel, a wear-resistant rubber layer is inlaid on the steel guide wheel, an annular groove is formed in the middle of the rubber guide wheel, bearing grooves are respectively formed in the upper end and the lower end of the rubber guide wheel, and the rubber guide wheel is fixed on two horizontal plates of the F-shaped frame through a bearing and a shaft through screws.
3. A device for inhibiting rotation during production of a cable insulation core as claimed in claim 1, wherein: the device is characterized by further comprising a fixed frame, wherein the fixed frame is formed by welding square steel, and the rubber guide wheel inclination adjusting device and the two groups of inclined rubber guide wheel interval adjusting devices are arranged on the fixed frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910590805.9A CN110253851B (en) | 2019-07-02 | 2019-07-02 | Device for inhibiting rotation in production process of cable insulation wire core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910590805.9A CN110253851B (en) | 2019-07-02 | 2019-07-02 | Device for inhibiting rotation in production process of cable insulation wire core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110253851A CN110253851A (en) | 2019-09-20 |
| CN110253851B true CN110253851B (en) | 2024-04-19 |
Family
ID=67923934
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910590805.9A Active CN110253851B (en) | 2019-07-02 | 2019-07-02 | Device for inhibiting rotation in production process of cable insulation wire core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110253851B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111716677B (en) * | 2020-06-19 | 2022-05-03 | 安徽渡江电缆集团有限公司 | Vertical tower type cable continuous vulcanizing equipment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB286929A (en) * | 1927-05-25 | 1928-03-15 | British Insulated Cables Ltd | Improvements in and connected with the manufacture of multicore electric cables |
| GB571023A (en) * | 1943-07-06 | 1945-08-02 | Standard Telephones Cables Ltd | Improvements in or relating to wheeled vehicles |
| CN103745786A (en) * | 2014-01-14 | 2014-04-23 | 广东金华电缆股份有限公司 | Insulation eccentricity correction equipment for medium/high-voltage cross-linked cable |
| CN105358367A (en) * | 2013-07-04 | 2016-02-24 | 株式会社三角工具加工 | Rotary operation control mechanism and seat |
| CN210390038U (en) * | 2019-07-02 | 2020-04-24 | 东方交联电力电缆有限公司 | Device for inhibiting rotation of cable insulation wire core in production process |
-
2019
- 2019-07-02 CN CN201910590805.9A patent/CN110253851B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB286929A (en) * | 1927-05-25 | 1928-03-15 | British Insulated Cables Ltd | Improvements in and connected with the manufacture of multicore electric cables |
| GB571023A (en) * | 1943-07-06 | 1945-08-02 | Standard Telephones Cables Ltd | Improvements in or relating to wheeled vehicles |
| CN105358367A (en) * | 2013-07-04 | 2016-02-24 | 株式会社三角工具加工 | Rotary operation control mechanism and seat |
| CN103745786A (en) * | 2014-01-14 | 2014-04-23 | 广东金华电缆股份有限公司 | Insulation eccentricity correction equipment for medium/high-voltage cross-linked cable |
| CN210390038U (en) * | 2019-07-02 | 2020-04-24 | 东方交联电力电缆有限公司 | Device for inhibiting rotation of cable insulation wire core in production process |
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| Publication number | Publication date |
|---|---|
| CN110253851A (en) | 2019-09-20 |
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