CN114055754A - Combined type offset core adjustment-free extrusion die - Google Patents
Combined type offset core adjustment-free extrusion die Download PDFInfo
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- CN114055754A CN114055754A CN202111313711.0A CN202111313711A CN114055754A CN 114055754 A CN114055754 A CN 114055754A CN 202111313711 A CN202111313711 A CN 202111313711A CN 114055754 A CN114055754 A CN 114055754A
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- die
- core
- flow channel
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- 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
- B29C48/256—Exchangeable extruder parts
- B29C48/2566—Die parts
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- 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
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/06—Rod-shaped
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- 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
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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
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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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention belongs to the technical field of cable forming, and particularly discloses a combined type adjustment-free core deviation extrusion die. The combined offset-core-adjustment-free extrusion die comprises a die core, a first die sleeve group and a second die sleeve group, wherein a convex ring is arranged on the periphery of the die core, and a plurality of material flowing holes are uniformly distributed in the convex ring along the circumferential direction; the first die sleeve group is coaxially sleeved on the outer side of the die core, one end of the first die sleeve group is connected with the convex ring through threads, a first material flow channel is formed between the inner profile of the first die sleeve group and part of the outer profile of the die core, and the first material flow channel is communicated with the material flow hole; the other end of the first die sleeve group is provided with a mounting seat hole; the second die sleeve set is coaxially and detachably mounted inside the mounting seat hole, a second material flow channel is arranged between the inner molded surface of the second die sleeve set and the other part of the outer molded surface of the die core, and the second material flow channel is communicated with the first material flow channel. The invention can control the core displacement of the cable, improve the quality stability of the cable, improve the adaptability of the mould, reduce the cost and improve the efficiency.
Description
Technical Field
The invention relates to the technical field of cable forming, in particular to a combined type adjustment-free core deviation extrusion die.
Background
The power cable is used for transmission and electric energy distribution, and the function of the power cable relates to the aspects of resident life, industrial production and other fields. The power cable has a structure as shown in fig. 1, and includes an inner conductive core 1 and a sheath layer 2 having an insulating property on the outside. At present, the forming process of the power cable mainly comprises the step of coating a sheath material on an internal conductive core body 1 through an extrusion die.
The core deviation rate is a key parameter of the forming quality of the power cable, and the calculation formula of the core deviation rate is as follows: and a is (D-D)/D (wherein a is the core displacement rate, D is the maximum single-point thickness of the sheath layer, and D is the minimum single-point thickness of the sheath layer). In the standard, the average thickness of the sheath layer and the thinnest point thickness of the sheath layer have definite reference values, and in addition, in addition to the standard requirements, the core deviation rate is definitely required to be not more than 10% in the technical protocol of the low-voltage power cable of the power grid.
At present, a low-voltage power cable sheath layer is formed in an extrusion tube mode generally, and 4 core deviation adjusting screws uniformly distributed on the periphery of a die sleeve are used for controlling the distance between a die core and the die sleeve, so that the maximum single-point thickness of the sheath layer and the thinnest point thickness of the sheath layer are controlled, and the core deviation degree of an extruded power cable is finally controlled. In the aspect of actual operation, the core deviation degree is controlled through manual adjustment operation, the adjustment experience of workers is mainly relied on, the core deviation degree of the produced power cable is greatly interfered by human factors, and the quality is not stable enough; in addition, the power cable molded in the mode needs workers to adjust the core-offset screw again before equipment is started or after the equipment is started for a period of time every time, so that the efficiency is low, and the labor cost is more wasted; meanwhile, the molding of power cables of different specifications (namely, power cables with sheath layers of different thicknesses) requires frequent disassembly and assembly of mold core mold sleeves, so that not only can the mold be abraded to a certain degree, but also eccentric screws can be readjusted due to the repeated positioning problem after disassembly and assembly, the labor cost is further increased, and the production efficiency is reduced.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a combined type adjustment-free core-shifting extrusion die, which is used for controlling the core shifting degree of a power cable, improving the stability of the quality of the power cable, reducing the abrasion of the die, improving the adaptability of the die, reducing the labor cost and improving the production efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme:
a combined type adjustment-free core-shifting extrusion die comprises:
the die comprises a die core, wherein a convex ring is arranged on the periphery of the die core, and a plurality of material flowing holes are circumferentially arranged on the convex ring;
the first die sleeve set is coaxially sleeved on the outer side of the die core, one end of the first die sleeve set is in threaded connection with the convex ring, a first material flow channel is formed between the inner profile of the first die sleeve set and part of the outer profile of the die core, and the first material flow channel is communicated with the material flow hole; the other end of the first die sleeve group is provided with a mounting seat hole;
and the second die sleeve set is coaxially and detachably mounted inside the mounting seat hole, a second material flow channel is arranged between the inner molded surface of the second die sleeve set and the other part of the outer molded surface of the die core, and the second material flow channel is communicated with the first material flow channel.
As a preferred scheme of the combined type adjustment-free core-shifting extrusion die, the cross section of the material flowing hole is circular, oval or kidney-shaped.
As a preferable scheme of the combined type offset-core-free extrusion die, the material flowing holes are used for being communicated with a material supply device, and the cross-sectional area of each material flowing hole is increased along with the increase of the distance from the material flowing hole to the material inlet.
As a preferable scheme of the combined type adjustment-free core-shifting extrusion die, the cross-sectional area of the first material flow channel is gradually reduced along the material flow direction.
As a preferable scheme of the combined type adjustment-free core-shifting extrusion die, the cross-sectional area of the second material flow channel is gradually reduced along the material flow direction.
As a preferred scheme of the combined type deviation core-adjusting-free extrusion die, the deviation core-adjusting-free extrusion die further comprises a fixed clamping ring, and the fixed clamping ring is connected with the other end of the first die set through threads and used for fixing the second die set.
As a preferred scheme of the combined type deviation core extrusion die without adjustment, the mounting seat hole is provided with an internal thread interface, one end of the fixed clamping ring is provided with an external thread interface, and the internal thread interface of the mounting seat hole is matched with the external thread interface of the fixed clamping ring through screw connection.
As a preferred scheme of the combined type adjustment-free core-shifting extrusion die, a plurality of bayonets distributed along the circumferential direction are arranged at the other end of the fixed clamping ring, and the bayonets are used for providing force applying positions for a wrench tool in the installation and disassembly processes of the fixed clamping ring.
As a preferred scheme of the combined type adjustment-free core-shifting extrusion die, the fixed clamping ring is made of metal.
As a preferable scheme of the combined type adjustment-free core-shifting extrusion die, the material of the second die set is nonmetal.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the relative positions of the first die sleeve group and the die core are accurately controlled by utilizing the threaded connection of the high-precision die core and the first die sleeve group, and the core deviation degree of the formed power cable is accurately controlled, so that the artificial error caused by the artificial core deviation adjusting operation can be avoided, and the core deviation degree quality of the formed power cable is more stable; meanwhile, for the molding of a part of power cables with different specifications, the molding can be conveniently realized only by replacing the second die sleeve group, the frequency of disassembling and assembling the die core and the first die sleeve group is reduced, the abrasion of the matching part between the die core and the first die sleeve group is reduced, and the service life is prolonged; the whole process avoids the manual core-adjusting process, greatly reduces the labor cost and improves the production efficiency.
Drawings
FIG. 1 is a schematic diagram of a prior art power cable;
FIG. 2 is a cross-sectional view of a combined type adjustment-free core-shifting extrusion die according to an embodiment of the present invention;
FIG. 3 is a cross-sectional view of a mold core provided in accordance with an embodiment of the present invention;
FIG. 4 is a side view of a mold core provided by an embodiment of the present invention;
FIG. 5 is a cross-sectional view of a first set of molds provided in accordance with an embodiment of the present invention;
FIG. 6 is a cross-sectional view of a second set of molds provided in accordance with an embodiment of the present invention;
FIG. 7 is a cross-sectional view of a retaining collar provided in accordance with an embodiment of the present invention;
fig. 8 is a side view of a retaining snap ring provided by an embodiment of the present invention.
In fig. 1: 1. a core body; 2. a sheath layer.
In fig. 2 to 8: 100. a mold core; 110. a convex ring; 111. a flow hole; 200. a first die set; 210. mounting seat holes; 211. an internal threaded interface; 300. a second die set; 400 fixing the snap ring; 401. an external thread interface; 402. a bayonet; 500. a first flow channel; 600. a second flow path.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description of the present embodiment, the terms "upper", "lower", "right", etc. are used in an orientation or positional relationship based on that shown in the drawings only for convenience of description and simplicity of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
Referring to fig. 2-6, the present embodiment provides a combined offset-core-free extrusion mold, which includes a mold core 100, the mold core 100 has a conical inner cavity for forming a channel for accommodating and transporting a core, and an end of the inner cavity with a large opening is an inlet of the core, and an end of the inner cavity with a small opening is an outlet of the core, and a threaded interface is arranged on an outer cylindrical surface of the inlet and is connected and fixed with a feeding device through the threaded interface; a convex ring 110 is further arranged on the periphery of the mold core 100, a plurality of material flowing holes 111 are circumferentially arranged on the convex ring 110, and the material flowing holes 111 are communicated with a feeding hole of feeding equipment, so that liquid materials generated by the feeding equipment enter the material flowing holes 111 through the feeding hole and finally enter a runner of a mold through the material flowing holes 111; the outer circumference of the male ring 110 is further provided with an external thread.
Referring to fig. 2-6, in the present embodiment, the combined type misalignment-free extrusion die further includes a first die set 200 and a second die set 300. First die sleeve set 200 is the circumference solid of revolution, and the outside comprises two cylinders coaxial coupling that the radius is different, and the inside of first die sleeve set 200 has the conical cavity that extends to little radius cylinder one end along big radius cylinder one end, can make first die sleeve set 200 cover the outside of locating mold core 100 coaxially through this conical cavity, and the big open end of the conical cavity of first die sleeve set 200 is equipped with the internal thread, and this internal thread is used for carrying out fastening connection with the external thread on the bulge loop 110 periphery. The inner surface of the conical cavity of the first die set 200 and the partial surface of the die core 100 form a first material flow channel 500, and the first material flow channel 500 is communicated with the material flow hole 111 of the die core 100; on the other end of the first die set 200, there is also a cylindrical mounting hole 210, one end of the mounting hole 210 has an internal threaded interface 211, the mounting hole 210 is communicated with a conical cavity, the second die set 300 is coaxially and detachably mounted inside the mounting hole 210, a conical cavity is also provided inside the second die set 300, through which the second die set 300 is further coaxially mounted outside the die core 100, the conical cavity profile of the second die set 300 and the other part profile of the die core 100 form a second material flow channel 600, and the second material flow channel 600 is communicated with the first material flow channel 500.
Referring to fig. 4, the cross-sectional shape of the material flow holes 111 is circular, and in other embodiments, the cross-sectional shape may also be oval, kidney-shaped or arc transition strip, the material flow holes 111 are communicated with the material inlet of the material supply device, and the cross-sectional area of each material flow hole 111 increases with the distance from the material flow hole 111 to the material inlet. Close to feedway feed inlet department, liquid stream material is fast excessively, feedway feed inlet department is keeping away from, because frictional resistance effect velocity of flow is relatively slow, so be close to feedway feed inlet's material hole 111 will be faster than the feed rate of keeping away from feedway feed inlet's material hole 111, optimize the cross sectional area in material hole 111 through this embodiment, can effectively guarantee that the inside liquid stream of entering stream passageway presents the uniform velocity flow along the periphery wall of mold core 100, further guaranteed that the liquid stream can evenly cladding on the core in the discharge gate department of mould, make the eccentric core degree of power cable after the shaping reduce, improve power cable's shaping quality. The specific cross-sectional area of the flow holes 111 and the number of the flow holes may be further determined according to the flow velocity, the material of the outer sheath, and other relevant factors, and are not specifically limited in this embodiment.
With continued reference to fig. 2, the cross-sectional area of the first material flow channel 500 decreases gradually along the material flow direction, and the cross-sectional area of the second material flow channel 600, which is communicated with the first material flow channel 500, also decreases gradually along the material flow direction, so that a buffer zone can be formed at the front of the material flow, and the material flow at the rear end of the channel can be continuous and stable through the buffer zone.
In this embodiment, the combined offset-free extrusion die further includes a fixing snap ring 400. Referring to fig. 7 and 8, the fixed snap ring 400 is a circumferential rotator, and an inner wall surface of the fixed snap ring 400 is sleeved on an outer wall surface of one end of the second die set 300; an external thread interface 401 is arranged on the outer peripheral wall surface of one end of the fixing snap ring 400, the external thread interface 401 is in threaded connection with the internal thread interface 211 at the end of the mounting seat hole 210, and the fixing snap ring 400 is used for fixing the second die set 300. When the power cable of different specifications need be produced to same equipment, for example, the inside core is the same, during the cable of the thickness difference of restrictive coating, only need through dismantling fixed snap ring 400, and change the second die sleeve group 300 of appointed specification, just can realize the convenience installation of different specification power cable in process of production, the adaptability of whole mould has further been improved to this kind of mode, also can reduce frequently to dismantle and change the wearing and tearing at the connection position that mold core 100 and first die sleeve group 200 caused, the life of mould has been increased, the production efficiency is also further improved, the cost of labor is reduced.
With continuing reference to fig. 7 and 8, the other end of the fixed snap ring 400 is provided with a bayonet 402 arranged along the circumferential direction, and the bayonet 402 can provide a force application position for a wrench tool conveniently, so as to facilitate screwing and disassembling of the fixed snap ring 400; the fixed snap ring 400 is a metal material with high strength and hardness, such as stainless steel or die steel, and is subjected to surface chromium plating treatment, the abrasion degree of the thread part and the end part of the fixed snap ring 400 of metal is small, and meanwhile, the metal material can enable the second die set 300 to be fixed more reliably, so that the uniformity of the outer sheath forming of the power cable is further ensured.
In this embodiment, the second die set 300 is a light high-temperature-resistant non-metallic material, the thermal expansion coefficient is low, under a high-temperature condition, the deformation amount is small, in the forming process of the power cable, the opening at the end of the second die set 300 is the discharge port of the die, the core body in the die core 100 is in contact with the outer sheath material at this position, the outer sheath material is uniformly coated on the core body, and since the temperature at this position is higher, only if the high-temperature deformation amount of the second die set 300 is ensured to be extremely small, the flow velocity of the material at the outer sheath at the outlet can be ensured to be uniform, and the core deviation degree of the formed power cable can be further ensured to meet the requirement.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, adaptations and substitutions will occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. The utility model provides a modular exempt from to transfer eccentric core extrusion tooling which characterized in that includes:
the die comprises a die core (100), wherein a convex ring (110) is arranged on the periphery of the die core (100), and a plurality of material flowing holes (111) are formed in the convex ring (110) along the circumferential direction;
the first die set (200) is coaxially sleeved outside the die core (100), one end of the first die set (200) is connected with the convex ring (110) through threads, a first material flow channel (500) is formed between the inner profile of the first die set (200) and part of the outer profile of the die core (100), and the first material flow channel (500) is communicated with the material flow hole (111); the other end of the first die set (200) is provided with a mounting seat hole (210);
a second die set (300) coaxially and detachably mounted inside the mounting seat hole (210), a second material flow channel (600) is arranged between the inner profile surface of the second die set (300) and the other part of the outer profile surface of the die core (100), and the second material flow channel (600) is communicated with the first material flow channel (500).
2. The combined type misalignment-free extrusion die of claim 1, wherein the cross section of the flow hole (111) is circular, oval or kidney-shaped.
3. The combined type misalignment-free extrusion die of claim 1, wherein the flow holes (111) are used for communicating with a feed inlet of a feeding device, and the cross-sectional area of each flow hole (111) increases with the distance from the flow hole (111) to the feed inlet.
4. The combined offset-free extrusion die of claim 1, wherein the cross-sectional area of the first flow channel (500) decreases in the direction of flow.
5. The combined offset-free extrusion die of claim 1, wherein the cross-sectional area of the second flow channel (600) decreases in the direction of flow.
6. The combined type core-offset-free extrusion die of claim 1, further comprising a fixing snap ring (400), wherein the fixing snap ring (400) is connected with the other end of the first die set (200) through threads for fixing the second die set (300).
7. The combined type misalignment-free extrusion die of claim 6, wherein the mounting hole (210) is provided with an internal threaded interface (211), one end of the fixing snap ring (400) is provided with an external threaded interface (401), and the internal threaded interface (211) of the mounting hole (210) is matched with the external threaded interface (401) of the fixing snap ring (400) through screwing.
8. The combined type adjustment-free eccentric extrusion die as claimed in claim 6, wherein the other end of the fixing clamping ring (400) is provided with a plurality of bayonets (402) distributed along the circumferential direction, and the bayonets (402) are used for providing force applying positions for a wrench tool during the installation and the disassembly of the fixing clamping ring (400).
9. The combined type misalignment-free extrusion die of claim 6, wherein the material of the fixing snap ring (400) is metal.
10. The combined offset-free extrusion die of any one of claims 1 to 9, wherein the material of the second die set (300) is non-metal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111313711.0A CN114055754A (en) | 2021-11-08 | 2021-11-08 | Combined type offset core adjustment-free extrusion die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111313711.0A CN114055754A (en) | 2021-11-08 | 2021-11-08 | Combined type offset core adjustment-free extrusion die |
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| Publication Number | Publication Date |
|---|---|
| CN114055754A true CN114055754A (en) | 2022-02-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111313711.0A Pending CN114055754A (en) | 2021-11-08 | 2021-11-08 | Combined type offset core adjustment-free extrusion die |
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| Country | Link |
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| CN (1) | CN114055754A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115366378A (en) * | 2022-08-26 | 2022-11-22 | 江苏永鼎盛达电缆有限公司 | Extrusion molding mould of special-shaped easy-to-tear cable |
| 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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| CN211566881U (en) * | 2019-12-24 | 2020-09-25 | 一方电气股份有限公司 | Pipe extrusion type combined die for cable extrusion layer |
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| CN103171114A (en) * | 2013-03-01 | 2013-06-26 | 福州通尔达电线电缆有限公司 | Combined extrusion-molding mold used in wire cable processing |
| CN205148705U (en) * | 2015-10-10 | 2016-04-13 | 宁波球冠电缆股份有限公司 | Cable extrusion machine with quick die change function |
| CN205395082U (en) * | 2016-02-29 | 2016-07-27 | 宏亮电缆有限公司 | Cable extruder head mould |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115366378A (en) * | 2022-08-26 | 2022-11-22 | 江苏永鼎盛达电缆有限公司 | Extrusion molding mould of special-shaped easy-to-tear cable |
| 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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