CN117325420A - Extrusion molding process of high-temperature heat-insulation fireproof composite material of medium-high-voltage fireproof cable - Google Patents
Extrusion molding process of high-temperature heat-insulation fireproof composite material of medium-high-voltage fireproof cable Download PDFInfo
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- CN117325420A CN117325420A CN202311418350.5A CN202311418350A CN117325420A CN 117325420 A CN117325420 A CN 117325420A CN 202311418350 A CN202311418350 A CN 202311418350A CN 117325420 A CN117325420 A CN 117325420A
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- 238000001125 extrusion Methods 0.000 title claims abstract description 40
- 239000002131 composite material Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 title claims abstract description 19
- 238000009413 insulation Methods 0.000 title abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 56
- 238000001816 cooling Methods 0.000 claims abstract description 28
- 230000001105 regulatory effect Effects 0.000 claims abstract description 19
- 239000004020 conductor Substances 0.000 claims abstract description 15
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 239000000463 material Substances 0.000 claims abstract description 8
- 239000000779 smoke Substances 0.000 claims abstract description 8
- 238000005336 cracking Methods 0.000 claims abstract description 6
- 238000002844 melting Methods 0.000 claims abstract description 4
- 230000008018 melting Effects 0.000 claims abstract description 4
- 238000002156 mixing Methods 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 30
- 238000001514 detection method Methods 0.000 claims description 15
- 230000000007 visual effect Effects 0.000 claims description 15
- 239000000203 mixture Substances 0.000 claims description 6
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002085 irritant Substances 0.000 description 2
- 231100000021 irritant Toxicity 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007794 irritation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Classifications
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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
-
- 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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/27—Cleaning; Purging; Avoiding contamination
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
-
- 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
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C48/96—Safety devices
-
- 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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention relates to the technical field of cable extrusion molding, and discloses an extrusion molding process of a high-temperature heat-insulation fireproof composite material of a medium-high-voltage fireproof cable, which comprises the following extrusion molding process steps of S1, mixing and preparing the high-temperature heat-insulation fireproof composite material, adding the high-temperature heat-insulation fireproof composite material into a preheated extruder hopper, S2, heating, melting and conveying the high-temperature heat-insulation fireproof composite material through an extruder, and extruding the melted high-temperature heat-insulation fireproof composite material on a cable conductor when the cable conductor passes through an extrusion molding head of the extruder, so that the cable conductor is coated with the high-temperature heat-insulation fireproof composite material. According to the invention, the water cooling and the air cooling are combined for cooling, the water temperature at each position is monitored, the corresponding position regulating valve is matched for regulating the local air speed, so that the local water temperature is rapidly regulated, the conditions of cracking and sinking of materials and the like caused by uneven heating during cooling are avoided, the air cooling is carried out, the smoke of an extrusion molding opening is purified, and the cable is visually detected after the cooling is finished, so that the extrusion molding quality is improved.
Description
Technical Field
The invention relates to the technical field of cable extrusion molding, in particular to a high-temperature heat-insulation fireproof composite material extrusion molding process for a medium-high-voltage fireproof cable.
Background
There are many kinds of cables, different kinds of cables are needed under different conditions, and the cables are selected to be improved on the outer protection layer, and the improvement of the outer protection layer enables the cables to have good performance.
In the prior art, when the medium-high voltage fireproof cable is produced, an extrusion molding process is an important ring, and comprises raw material preparation, extrusion molding by an extruder and cooling shaping, so that the cable has good high-temperature-resistant, heat-insulating and fireproof functions, the outer layer of the cable can be extruded, and the high-temperature-resistant, heat-insulating and fireproof material can be extruded on the outer layer of the cable;
in the traditional extrusion molding process, the smoke produced by extrusion molding has strong irritation, is easy to influence staff, and is inconvenient in water temperature control and different in cooling degree when cooling and shaping are carried out, so that the extruded material is concave or cracked and the like.
Therefore, the extrusion molding process of the high-temperature heat-insulating fireproof composite material of the medium-high-voltage fireproof cable, which can conduct double-layer heat dissipation by means of water cooling and air cooling, monitor and regulate the air cooling, ensure good cooling, and conduct visual detection at the tail end so as to discover the appearance quality problem in time, is provided to solve the problems.
Disclosure of Invention
The invention aims to provide an extrusion molding process of a high-temperature heat-insulation fireproof composite material for a medium-high-voltage fireproof cable, which aims to solve the problems in the prior art.
The aim of the invention can be achieved by the following technical scheme:
an extrusion molding process of a high-temperature heat-insulation fireproof composite material of a medium-high voltage fireproof cable comprises the following extrusion molding process steps:
s1, mixing the high-temperature heat-insulating fireproof composite material to prepare a mixture, and adding the mixture into a preheated hopper of an extruder;
s2, heating, melting and conveying the high-temperature heat-insulating fireproof composite material through an extruder, extruding the melted high-temperature heat-insulating fireproof composite material on the cable conductor when the cable conductor passes through an extrusion head of the extruder, so that the cable conductor is coated with the high-temperature heat-insulating fireproof composite material and then pulled out;
s3, the cable conductor coated with the high-temperature heat-insulating fireproof composite material is pulled into water in the cold water tank, in the process, the water temperature is monitored in real time through the temperature sensor, the inlet amount of circulating water is regulated, the whole temperature is ensured to be consistent, and material cracking caused by uneven heating is avoided;
s4, when the water is cooled, the fan is started to work, so that cool air is blown onto the water surface through the air inlet pipe, the air outlet pipe and the shunt pipe in sequence to cool, the regulating valve is regulated according to the water temperature during the cooling process, and the local wind speed is changed to ensure that the water is cooled to a consistent state rapidly;
s5, when the air cooling is carried out, part of air enters from the through hole, and the other part of air enters from the lower part of the activated carbon purifier, so that the smoke at the extrusion molding opening is sucked and purified;
s6, conveying the cooled cable out of the cold water tank, photographing through visual detection equipment while conveying the cooled cable out, and transmitting data for visual detection so as to acquire the appearance quality of the cooled cable after extrusion molding in time;
and S7, when the appearance quality is unqualified, an alarm is sent out in time, and staff check and solve the problem in time.
As a further scheme of the invention: including extruding machine and cold water tank, its characterized in that, one side of extruding machine is provided with the cold water tank, one side fixedly connected with fan on cold water tank top, one side fixedly connected with air-supply line of fan, the bottom threaded connection of air-supply line has activated carbon purifier, the opposite side fixedly connected with air-out pipe of fan, the even fixedly connected with shunt tubes of bottom of air-out pipe, one side of shunt tubes is all fixedly connected with governing valve.
As a further scheme of the invention: the top end of the activated carbon purifier is communicated with the interior of the air inlet pipe, and the activated carbon purifier is positioned right above the cable.
As a further scheme of the invention: through holes are uniformly formed in the outer surface of the air inlet pipe, and the through holes are formed in the outer surface of one side, close to the fan, of the air inlet pipe.
As a further scheme of the invention: one side of the cold water tank is uniformly and fixedly connected with temperature sensors in a penetrating mode, and the positions of the temperature sensors correspond to the shunt tubes one by one.
As a further scheme of the invention: the both ends of cold water groove one side are all fixedly connected with visual detection equipment, visual detection equipment's subassembly of making a video recording is located the both sides of cable.
The invention has the beneficial effects that:
1. according to the extrusion molding process of the high-temperature heat-insulating fireproof composite material for the medium-high-voltage fireproof cable, disclosed by the invention, the water temperature of each part in the cold water tank is monitored through the water cooling mode and the air cooling mode, and the corresponding position adjusting valve is matched to be adjusted to change the local wind speed, so that the local water temperature is quickly adjusted, the overall water temperature is consistent, and the conditions of cracking and sinking of the material caused by uneven heating during cooling are avoided.
2. According to the extrusion molding process of the high-temperature heat-insulating fireproof composite material for the medium-high-voltage fireproof cable, disclosed by the invention, the air cooling is carried out, and the suction of an extrusion molding opening can be realized, so that the smoke generated by extrusion molding is sucked and purified, and the diffusion of a large amount of irritant gases is reduced.
3. According to the extrusion molding process of the high-temperature heat-insulating fireproof composite material for the medium-high-voltage fireproof cable, when the cable is cooled and conveyed out, bidirectional photographing visual detection is carried out, so that the appearance quality condition of the cable after extrusion molding is adopted, and the convenience is brought for operators to check and adjust in time.
Drawings
The present invention is further described below with reference to the accompanying drawings for the convenience of understanding by those skilled in the art.
Fig. 1 is a schematic perspective view of the present invention.
Fig. 2 is a schematic perspective view of a cold water tank according to the present invention.
In the figure: 1. an extrusion molding machine; 2. a cold water tank; 3. an activated carbon purifier; 4. a through hole; 5. an air inlet pipe; 6. a blower; 7. a shunt; 8. an air outlet pipe; 9. a visual inspection device; 10. a regulating valve; 11. a temperature sensor.
Detailed Description
The technical solutions of the present invention will be clearly and completely described in connection with the embodiments, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1 and 2, an extrusion molding process for a high-temperature heat-insulating fireproof composite material of a medium-high voltage fireproof cable in this embodiment includes the following extrusion molding process steps:
s1, mixing the high-temperature heat-insulating fireproof composite material to prepare a mixture, and adding the mixture into a preheated hopper of an extruder 1;
s2, heating, melting and conveying the high-temperature heat-insulating fireproof composite material through the extruder 1, extruding the melted high-temperature heat-insulating fireproof composite material on the cable conductor when the cable conductor passes through an extrusion head of the extruder 1, so that the cable conductor is coated with the high-temperature heat-insulating fireproof composite material, and then drawing out;
s3, a cable conductor coated with the high-temperature heat-insulating fireproof composite material is pulled into water in the cold water tank 2, in the process, the temperature of water is monitored in real time through the temperature sensor 11, the inlet amount of circulating water is regulated, the whole temperature is ensured to be consistent, and material cracking caused by uneven heating is avoided;
s4, when the water is cooled, the fan 6 is started to work, so that cool air is blown onto the water surface through the air inlet pipe 5, the air outlet pipe 8 and the shunt pipe 7 in sequence to cool, the regulating valve 10 is regulated according to the water temperature during the period, and the local wind speed is changed to ensure that the water is cooled to a consistent state;
s5, when the air cooling is carried out, part of air enters from the through hole 4, and the other part of air enters from the lower part of the activated carbon purifier 3, so that the smoke at the extrusion molding opening is sucked and purified;
s6, conveying the cooled cable out of the cold water tank 2, photographing through the visual detection equipment 9 while conveying the cooled cable out, and transmitting data for visual detection so as to acquire the appearance quality of the cooled cable after extrusion molding in time;
and S7, when the appearance quality is unqualified, an alarm is sent out in time, and staff check and solve the problem in time.
As shown in fig. 1 and fig. 2, the cooling device comprises an extruding machine 1 and a cooling water tank 2, and is characterized in that the cooling water tank 2 is arranged on one side of the extruding machine 1, a fan 6 is fixedly connected to one side of the top end of the cooling water tank 2, an air inlet pipe 5 is fixedly connected to one side of the fan 6, an activated carbon purifier 3 is connected to the bottom end of the air inlet pipe 5 in a threaded manner, an air outlet pipe 8 is fixedly connected to the other side of the fan 6, a shunt pipe 7 is uniformly and fixedly connected to the bottom end of the air outlet pipe 8, a regulating valve 10 is fixedly connected to one side of the shunt pipe 7, and the cooling device is used for carrying out combined cooling through two manners of water cooling and air cooling, and local water temperature is changed through regulating the corresponding position regulating valve 10, so that local water temperature is quickly regulated, the overall water temperature is consistent, and the conditions such as material cracking and sinking caused by uneven heating during cooling are avoided.
As shown in fig. 1 and 2, the top end of the activated carbon purifier 3 in the present embodiment is communicated with the inside of the air inlet pipe 5, and the activated carbon purifier 3 is located right above the cable, so that when the fan 6 works, a part of the outside air will suck the smoke at the extrusion molding port, and the smoke is purified by the activated carbon purifier 3, so as to reduce the diffusion of a large amount of irritant gases.
As shown in fig. 1 and 2, the outer surface of the air inlet pipe 5 in this embodiment is uniformly provided with through holes 4, and the through holes 4 are on the outer surface of the air inlet pipe 5 on one side close to the fan 6, and due to the arrangement of the activated carbon purifier 3, the overall air inlet amount can be reduced, and the burden of the fan 6 can be increased, so that the amount of outside air entering is increased through the arrangement of the through holes 4, and the burden of the fan 6 is reduced.
As shown in fig. 1 and 2, one side of the cold water tank 2 in this embodiment is uniformly and fixedly connected with a temperature sensor 11, and the positions of the temperature sensor 11 and the shunt tubes 7 are in one-to-one correspondence, so that real-time monitoring of water temperature is sequentially realized, and the positions of the temperature sensor and the shunt tubes 7 are in one-to-one correspondence, so that the corresponding shunt tubes 7 are controlled and regulated.
As shown in fig. 1 and fig. 2, two ends of one side of the cold water tank 2 in this embodiment are fixedly connected with a visual detection device 9, a camera component of the visual detection device 9 is located at two sides of a cable, and when the cable is cooled and is conveyed out, bidirectional photographing visual detection is performed, so that appearance quality after extrusion molding of the cable or appearance quality is improved, and a worker can check and adjust in time.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand and utilize the invention. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (6)
1. The extrusion molding process of the high-temperature heat-insulating fireproof composite material of the medium-high-voltage fireproof cable is characterized by comprising the following extrusion molding process steps of:
s1, mixing the high-temperature heat-insulating fireproof composite material to prepare a mixture, and adding the mixture into a hopper of a preheated extruder (1);
s2, heating, melting and conveying the high-temperature heat-insulating fireproof composite material through the plastic extruder (1), extruding the melted high-temperature heat-insulating fireproof composite material on the cable conductor when the cable conductor passes through an extrusion molding head of the plastic extruder (1), so that the cable conductor is coated with the high-temperature heat-insulating fireproof composite material and then pulled out;
s3, a cable conductor coated with the high-temperature heat-insulating fireproof composite material is pulled into water in the cold water tank (2), in the process, the temperature of water is monitored in real time through the temperature sensor (11), the inlet amount of circulating water is regulated, the whole temperature is ensured to be consistent, and material cracking caused by uneven heating is avoided;
s4, when the water is cooled, the fan (6) is started to work, so that cool air is blown on the water surface through the air inlet pipe (5), the air outlet pipe (8) and the shunt pipe (7) in sequence to cool, and the regulating valve (10) is regulated according to the water temperature during the cooling process, so that the local wind speed is changed, and the water is enabled to be cooled to a consistent state rapidly;
s5, when the air cooling is carried out, part of air enters from the through hole (4), and the other part of air enters from the lower part of the activated carbon purifier (3), so that the smoke at the extrusion molding opening is sucked and purified;
s6, conveying the cooled cable out of the cold water tank (2), photographing through a visual detection device (9) while conveying the cooled cable out, and transmitting data for visual detection so as to acquire the appearance quality of the cooled cable after extrusion molding in time;
and S7, when the appearance quality is unqualified, an alarm is sent out in time, and staff check and solve the problem in time.
2. The equipment for extruding high-temperature heat-insulating fireproof composite materials for the medium-high-voltage fireproof cable according to claim 1, comprising an extruding machine (1) and a cold water tank (2), wherein one side of the extruding machine (1) is provided with the cold water tank (2), one side fixedly connected with fan (6) at the top end of the cold water tank (2), one side fixedly connected with air inlet pipe (5) of the fan (6), the bottom thread connection of the air inlet pipe (5) is provided with an activated carbon purifier (3), the other side fixedly connected with air outlet pipe (8) of the fan (6), the bottom end of the air outlet pipe (8) is uniformly fixedly connected with a shunt pipe (7), and one side of the shunt pipe (7) is fixedly connected with a regulating valve (10).
3. The equipment for extruding a high-temperature heat-insulating fireproof composite material for a medium-high-voltage fireproof cable according to claim 2, wherein the top end of the activated carbon purifier (3) is communicated with the interior of the air inlet pipe (5), and the activated carbon purifier (3) is positioned right above the cable.
4. The equipment for extruding high-temperature heat-insulating fireproof composite materials for medium-high-voltage fireproof cables according to claim 2, wherein through holes (4) are uniformly formed in the outer surface of the air inlet pipe (5), and the through holes (4) are formed in the outer surface of one side, close to the fan (6), of the air inlet pipe (5).
5. The equipment for extruding high-temperature heat-insulating fireproof composite materials for the medium-high-voltage fireproof cables according to claim 2, wherein one side of the cold water tank (2) is uniformly and fixedly connected with temperature sensors (11) in a penetrating mode, and the positions of the temperature sensors (11) are in one-to-one correspondence with the shunt tubes (7).
6. The equipment for extruding high-temperature heat-insulating fireproof composite material for medium-high-voltage fireproof cables according to claim 2, wherein visual detection equipment (9) is fixedly connected to two ends of one side of the cold water tank (2), and camera shooting components of the visual detection equipment (9) are located on two sides of the cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311418350.5A CN117325420A (en) | 2023-10-30 | 2023-10-30 | Extrusion molding process of high-temperature heat-insulation fireproof composite material of medium-high-voltage fireproof cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311418350.5A CN117325420A (en) | 2023-10-30 | 2023-10-30 | Extrusion molding process of high-temperature heat-insulation fireproof composite material of medium-high-voltage fireproof cable |
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| Publication Number | Publication Date |
|---|---|
| CN117325420A true CN117325420A (en) | 2024-01-02 |
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| CN202311418350.5A Pending CN117325420A (en) | 2023-10-30 | 2023-10-30 | Extrusion molding process of high-temperature heat-insulation fireproof composite material of medium-high-voltage fireproof cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118493823A (en) * | 2024-07-17 | 2024-08-16 | 江苏长城电缆有限公司 | Extrusion molding production equipment and production method for special cable |
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2023
- 2023-10-30 CN CN202311418350.5A patent/CN117325420A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118493823A (en) * | 2024-07-17 | 2024-08-16 | 江苏长城电缆有限公司 | Extrusion molding production equipment and production method for special cable |
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