CN113021830B - Production device of fireproof flame-retardant cable - Google Patents
Production device of fireproof flame-retardant cable Download PDFInfo
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- CN113021830B CN113021830B CN202110219128.7A CN202110219128A CN113021830B CN 113021830 B CN113021830 B CN 113021830B CN 202110219128 A CN202110219128 A CN 202110219128A CN 113021830 B CN113021830 B CN 113021830B
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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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- 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
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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
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
- B29C48/335—Multiple annular extrusion nozzles in coaxial arrangement, e.g. for making multi-layered tubular 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
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers 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
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/17—Protection against damage caused by external factors, e.g. sheaths or armouring
- H01B7/29—Protection against damage caused by extremes of temperature or by flame
- H01B7/295—Protection against damage caused by extremes of temperature or by flame using material resistant to flame
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- 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
Abstract
The invention relates to the technical field of cable production, in particular to a production device of a fireproof flame-retardant cable, which comprises an inner coating die, wherein the inner coating die comprises an inner core die and an inner coating die which is coaxially arranged with the inner core die; a channel is arranged in the inner core die; an inner coating cavity is arranged in the inner coating film, one end of the inner core mold extends into the inner coating cavity, and a discharge hole and a material injection channel communicated with the inner coating cavity are arranged on the inner coating cavity; the inner coating cavity is internally provided with a circle of inner bulges, and a diaphragm gap is arranged between the inner bulges and the circumferential cavity wall of the inner coating cavity. The fireproof flame-retardant cable capable of effectively and reliably avoiding the combustion of the electric wire and the cable can be produced.
Description
Technical Field
The invention relates to the technical field of cable production, in particular to a production device of a fireproof flame-retardant cable.
Background
The wire and the cable are one of important materials for the infrastructure of the modern society, are used for providing energy or transmitting information for daily life, industrial production, information transmission and the like of people, and are an indispensable part of infrastructure for the development of the modern society.
The main structure of the cable is a conducting wire wrapped by a sheath material and an insulating material, and the conducting wire is mainly a metal conducting wire; the electric wire and the cable have more combustion caused by the influence of the external environment in the use process. The fire can cause the sheath layer of the electric wire and cable to lose efficacy and then destroy the internal insulation and conductor to cause damage and other problems, and the fire seriously causes the fire to endanger the personal and property safety, so the fire resistance of the electric wire and cable is particularly important.
In the prior art, materials with flame retardancy are developed and added into an insulating layer and a sheath layer as one of components mainly by improving insulating and sheath materials, but generally, electric wires and cables have a multilayer structure, and the materials with flame retardancy can not be added into each layer according to the performance and action of each layer material.
In conclusion, although the existing cable has fireproof performance, the cable layer without the flame retardant material is still ignited, so that the burning of the electric wire and the cable cannot be effectively and reliably avoided, and potential safety hazards exist; therefore, it is highly desirable to invent a production apparatus for a fireproof flame-retardant cable.
Disclosure of Invention
The invention provides a production device of a fireproof flame-retardant cable, which can produce the fireproof flame-retardant cable capable of effectively and reliably avoiding the burning of wires and cables.
The application provides the following technical scheme:
the production device of the fireproof flame-retardant cable comprises an inner coating die, wherein the inner coating die comprises an inner core die and an inner coating die which is coaxial with the inner core die; a channel is arranged in the inner core die; an inner coating cavity is arranged in the inner coating film, one end of the inner core mold extends into the inner coating cavity, and a discharge hole and a material injection channel communicated with the inner coating cavity are arranged on the inner coating cavity; the inner coating cavity is internally provided with a circle of inner bulges, and a diaphragm gap is arranged between the inner bulges and the circumferential cavity wall of the inner coating cavity.
Has the advantages that:
in order to effectively avoid the combustion of the electric wires and cables and achieve better flame retardant effect; this technique is through including the inner bag intracavity sets up interior arch, the diaphragm gap has between the chamber wall in interior arch and interior cladding chamber, when making the melting cladding material cladding that enters into the interior cladding intracavity on the semi-manufactured goods cable among the prior art (the semi-manufactured goods cable of here indicates the current cable that has insulating layer and sheath in the outer cladding of conductor in proper order), can be including protruding department formation air cavity, inert gas can be filled in the air cavity, receive external high temperature at the gas protection layer, the destruction appears under the influence of external force, the balance is broken and is released inert gas, push away near the air of cable surface, the oxygen that isolated combustion needs, and then avoid the cable burning, realize the automatic triggering fire prevention of cable fire-retardant, can effectively reliable avoid the wire and cable burning, in time effectually avoid the intensity of a fire to enlarge.
Further, the material injection channel comprises an end material injection channel and a circumferential material injection hole, and the circumferential material injection hole is positioned on the circumferential outer wall of the inner covering mold; the end injection channel is positioned at the end part of the inner coating film.
The supply amount of the coating material in the inner coating cavity is fully ensured, so that the inner coating cavity is filled with the coating material.
Further, one side of the inner packaging cavity is opened to form the discharge hole; an end plate is arranged on the other side of the inner cladding cavity, a circular truncated cone-shaped hole is formed in the center of the end plate, one end of the inner core die extends into the inner cladding cavity from the circular truncated cone-shaped hole, and a material end injection channel is formed between the inner core die and the hole wall of the circular truncated cone-shaped hole.
The supply of the coating material in the inner coating cavity is simply realized; one side of the inner coating cavity is open, so that the cable coated with the inner protective layer can be led out from the opening conveniently.
The outer cladding die comprises an outer core die and an outer cladding die which is coaxially arranged with the outer core die; a channel is arranged in the outer core mould, and the inner diameter of the channel of the outer core mould is larger than that of the channel of the inner core mould; an outer coating cavity is arranged in the outer coating cavity, and the inner diameter of the outer coating cavity is larger than that of the inner coating cavity; an outer bulge is arranged in the outer coating cavity, and a stable layer gap is arranged between the outer bulge and the circumferential cavity wall of the outer coating cavity; and the outer bulge and the inner bulge are arranged in a staggered manner.
Has the advantages that:
1. through setting up the outer cladding mould that the structure is the same with interior cladding mould, can have the cladding again cladding one deck outer protective layer of interior protective layer cable to the cladding, further guarantee flame retardant efficiency.
2. Outer arch and interior protruding dislocation set, and then make the air cavity on the interior protective layer misplace with the air cavity on the outer protective layer, form the air cavity structure of crisscross distribution for mutual tractive is balanced between interior protective layer and the outer protective layer, more is favorable to forming balanced stable gas protection layer structure.
Further, the width of the stabilizer layer gap is 2mm or more.
Can inwards provide the effect of restrainting in the outside for preferring like this design through the stabilizer layer, guarantee that gas protection layer can reliable and stable cladding outside the insulating layer, can provide certain top layer structural strength to gas protection layer, keep the cable appearance regular while the top layer possesses certain structuredness, can not damage easily in the use.
Further, the width of the diaphragm gap is larger than or equal to 0.5mm, and the width of the diaphragm gap is smaller than that of the stabilizing layer gap.
The diaphragm structure designed like the optimization is convenient to produce and realize, meets the requirement on the air pressure inside the air cavities, can effectively maintain the pressure balance among all the air cavities in the air protection layer, can quickly and effectively form the chain rupture reaction after being damaged and ruptured, and ensures that the automatic gas flame-retardant and fireproof functions of the cable are effectively realized.
Furthermore, inflation channels are arranged in the inner bulge and the outer bulge, and one end of each inflation channel extends to the end face of one end of the inner bulge, which is far away from the inner core die, so that an inflation inlet is formed; the other end of the inflation channel extends to the outer wall of the inner covering die to form an air inlet.
Compared with the mode that the inner protection layer and the outer protection layer are inflated after being formed, the inner protection layer/the outer protection layer is formed in an overlaying mode, the air cavity is inflated through the inflation inlet on the inner protrusion/the outer protrusion, the cavity is prevented from collapsing, the inflation function can be achieved, and the inner protection layer/the outer protection layer is quite convenient to use.
Further, the cross sections of the inner protrusions and the outer protrusions are fan-shaped.
Make the air cavity in inner protective layer and the outer protective layer be fan-shaped, the air pressure effect more concentrates on the inboard towards semi-manufactured goods cable in every air cavity like this, and the stable layer in the outside can effectual restriction gas protection layer appearance profile, and then reduces or has avoided the gas protection layer surface to produce the swell or unexpected damage because of atmospheric pressure is uneven.
And a first water cooling part is arranged between the inner cladding die and the outer cladding die, and a second water cooling part is arranged behind the outer cladding die.
The first water cooling part can be used for cooling the cable coated with the inner protection layer, and the second water cooling part can be used for cooling the cable coated with the outer protection layer.
Further, a wiping part is arranged between the first water cooling part and the outer coating die.
And after water stains on the inner protective layer are wiped dry, the outer protective layer is coated, so that the coating effect is ensured.
Drawings
Fig. 1 is a left side view of an inner cladding mold according to a first embodiment of the invention;
FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a left side view of an overcladding die in accordance with a first embodiment of the present invention;
FIG. 4 is a left side view of an inner cladding mold of the second embodiment of the invention;
FIG. 5 is a cross-sectional view taken along line B-B of FIG. 4;
fig. 6 is a cross-sectional view of a fire-resistant, flame-retardant cable produced using the apparatus of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
the reference numbers in the drawings of the specification include: conductor 1, insulating layer 2, inner protective layer 3, outer protective layer 4, diaphragm 5, stabilizing layer 6, sheath 7, inner coating die 8, inner coating cavity 81, inner protrusion 811, diaphragm gap 812, inner core die 82, passage 821, end injection passage 83, circumferential injection hole 84, outer coating die 9, outer core die 91, outer protrusion 92, stabilizing layer gap 93, inflation passage 10, inflation inlet 101 and air inlet 102.
Example one
A fire-retardant cable production device, which is used for producing the fire-retardant cable shown in the attached figure 6, and for the convenience of understanding, the structure of the fire-retardant cable is described in detail as follows: this fire prevention flame retarded cable includes the base course and the gaseous protective layer of cladding setting outside the base course, and the base course includes conductor 1, insulating layer 2 and sheath 7, and the cladding of insulating layer 2 is outside conductor 1, and the cladding of sheath 7 is outside insulating layer 2. The gas protection layer is including encircleing at the inner protective layer 3 and the outer protective layer 4 in the insulating layer 2 outside, and inner protective layer 3 and outer protective layer 4 are all separated for a plurality of air cavity along the annular through diaphragm 5, and the air cavity is the sector chamber, and the shape size homogeneous phase of a plurality of air cavity of outer protective layer 4 is the same, and a plurality of air cavity shape size homogeneous phase of inner protective layer 3. The air cavity of inner protective layer 3 and the crisscross distribution setting of air cavity of outer protective layer 4 all fill inert gas in inner protective layer 3 and the outer protective layer 4, and inner protective layer 3 fills nitrogen gas, and outer protective layer 4 fills carbon dioxide gas, and the inside atmospheric pressure of inner protective layer 3 is the same with the inside atmospheric pressure of outer protective layer 4.
The outer wall of the outer protection layer 4 is a stabilizing layer 6, and the thickness of the stabilizing layer 6 is more than or equal to 2mm. The thickness of the diaphragm 5 is greater than or equal to 0.5mm, and the thickness of the diaphragm 5 is smaller than that of the stabilizing layer 6. The insulating layer 2, the diaphragm 5 and the stabilizing layer 6 are made of insulating materials and are integrally extruded and molded.
As shown in fig. 1, 2 and 3, an apparatus for producing a fireproof and flame-retardant cable is sequentially provided with an inner coating mold, a first water-cooling portion, an outer coating mold and a second water-cooling portion along a cable production and transmission direction; the inner coating die is used for coating and forming the inner protective layer 3, and comprises an inner core die 82 and an inner coating die 8 which is coaxially arranged with the inner core die 82; the inner core mold 82 is provided with a passage 821 through which the semi-finished cable coated with the base layer passes. An inner coating cavity 81 is formed in the inner coating film, one side of the inner coating cavity 81 is provided with an opening to form a discharge hole, the other side of the inner coating cavity 81 is provided with an end plate, and the center of the end plate is provided with a circular truncated cone-shaped hole; one end of the inner core mold 82 extends into the inner coating cavity 81 from the circular truncated cone-shaped hole, and the other end of the inner core mold 82 is positioned outside the inner coating mold 8. The inner core mold 82 and the inner overmold 8 are each secured to a cable forming apparatus or rack, as is known in the art and not described in greater detail.
An injection channel is arranged on the inner covering die 8, one end of the injection channel is communicated with a material pipe or equipment for supplying molten covering materials from the outside, and the other end of the injection channel is communicated with the inner covering cavity 81; in order to further ensure the supply amount of the cladding material in the inner cladding cavity 81, the material injection channel in the embodiment comprises an end material injection channel 83 and a circumferential material injection hole 84, and the end material injection channel 83 is formed by the gap between the inner core die 82 and the wall of the circular truncated cone-shaped hole; the circumferential injection holes 84 are located on the circumferential outer wall of the inner overmold 8. A circle of bulges are arranged in the inner coating cavity 81, and are named as inner bulges 811 for convenient distinguishing, the inner bulges 811 are circumferentially arrayed along the central axis of the inner coating die 8, and one side of the inner bulges 811 close to the inner core die 82 is integrally formed with the end plate at the end part of the inner coating cavity 81; the inner protrusion 811 has a diaphragm slit 812 between it and the circumferential chamber wall of the inner envelope chamber 81.
The outer coating die comprises an outer core die 91 and an outer coating die 9 which is coaxially arranged with the outer core die 91; the detailed structure of the outer core mold 91 is the same as that of the inner core mold 82, and only the size is different: since the outer core mold 91 is used for passing the cable coated with the inner protective layer 3, the inner diameter of the passage 821 of the outer core mold 91 is larger than the inner diameter of the passage 821 of the inner core mold 82. Similarly, the specific structure of the outer coating die 9 is consistent with that of the inner coating die 8, and only the sizes are different: since the outer coating die 9 is to cover the outer protective layer 4 on the outer surface of the inner protective layer 3, the inner diameter of the outer coating cavity is larger than the inner diameter of the inner coating cavity 81. In order to ensure that the air cavities on the produced outer protective layer 4 and the air cavities on the inner protective layer 3 are arranged in a staggered manner, the bulges in the outer cladding cavity are also arranged in a staggered manner with the bulges in the inner cladding cavity 81.
The bulge in the outer envelope cavity is an outer bulge 92, a gap is provided between the outer bulge 92 and the circumferential cavity wall of the outer envelope cavity, the gap is a stabilizer layer gap 93 forming the stabilizer layer 6, and the width of the stabilizer layer gap 93 is greater than the width of the diaphragm gap 812. The width of the stable layer gap 93 is greater than or equal to 2mm, specifically, 2mm is taken in this embodiment; the width of the diaphragm slit 812 is 0.5mm or more, specifically 0.5mm in this embodiment.
The first water cooling part and the second water cooling part are water cooling modes adopted in the cable production process in the prior art, generally comprise water cooling grooves, circulating cold water is arranged in the water cooling grooves, the cable coated with the outer membrane penetrates through the water cooling grooves, and plastic on the periphery of the cable is reinforced through the cold water.
The specific implementation process is as follows:
the cable production method comprises the following steps: simultaneously injecting molten cladding material into the inner cladding cavity 81 through the end injection channels 83 and the circumferential injection holes 84 so that the inner cladding cavity 81 is filled with the cladding material; the semi-finished cable coated with the base layer penetrates into the inner core mold 82 and then enters the inner coating cavity 81 to be contacted with the coating material; due to the arrangement of the inner protrusion 811, an air cavity can be formed when the covering material forms the inner protection layer 3 outside the semi-finished cable. After the inner protective layer 3 is coated, the semi-finished cable enters a first water cooling part for water cooling forming; then, the outer protective layer 4 is formed by being fed from the outer core mold 91 into the outer cover mold 9 and covered in the same manner as described above.
Example two
The difference between the present embodiment and the first embodiment is that each of the inner protrusion 811 and the outer protrusion 92 is provided with an inflation channel 10; the present embodiment is specifically explained by taking inner protrusion 811 as an example: as shown in fig. 4 and 5, one end of the inflation channel 10 extends to the end face of the inner protrusion 811 away from the end of the inner core mold 82 to form an inflation inlet 101; the other end of the inflation channel 10 extends to the outer wall of the inner covering mold 8 to form an air inlet 102, and the air inlet 102 is communicated with a nitrogen pipe. The structure of the inflation channel 10 on the outer protrusion 92 is identical to that on the inner protrusion 811 except that the carbon dioxide tube is communicated at the air inlet 102 of the outer protrusion 92.
During the use, can be when the protective layer 3 in the overmolding, aerify to the air cavity through inflation inlet 101 on the interior arch 811, can also realize aerifing function when preventing that the cavity from collapsing, unusual convenience.
EXAMPLE III
The difference between this embodiment and the second embodiment is that the inner protrusion 811 is detachably connected to the end plate on the inner coating cavity 81: the end of the inner protrusion 811 adjacent to the end plate is integrally formed with a mounting plate, which is fixed to the end plate by screws. Similarly, the outer protrusion 9 and the end plate of the outer cladding cavity are also fixed by screws. Similarly, the outer protrusion 92 is removably attached to the end plate on the outer envelope cavity in the manner described above. So that the inner and outer protrusions 811, 92 can be changed in size or shape as desired.
Example four
The difference between this embodiment and the third embodiment is that the detachable connection manner between the inner protrusion 811 and the end plate on the inner coating cavity 81 is a threaded connection, specifically: a threaded rod is integrally formed at the end part of the inner protrusion 811, a threaded blind hole is formed in the end plate, and the threaded rod can extend into the threaded blind hole to realize threaded connection. Similarly, the outer protrusion 92 is removably attached to the end plate on the outer envelope cavity in the manner described above.
EXAMPLE five
The difference between this embodiment and the first embodiment is that the width of the stabilizer gap 93 is equal to the width of the diaphragm gap 812, so that the thicknesses of the outer wall of the produced inner protection layer and the outer wall of the produced outer protection layer are both equal to or greater than 0.5mm, and in this embodiment, specifically, 0.5mm is adopted. The outside cladding of outer protective layer 4 has the inoxidizing coating, and the thickness more than or equal to 2mm of inoxidizing coating, this embodiment specifically are 2mm.
EXAMPLE six
The difference between the embodiment and the first embodiment is that the fans are added in the preambles of the first water cooling part and the second water cooling part, so that the cables coated with the inner protection layer 3 and the outer protection layer 4 are both cooled by air and then cooled by water, wherein the air cooling temperature is 30-35 ℃, the embodiment is 30 ℃, and the phenomenon that the material forming is influenced by too low and rapid cooling temperature is avoided; the time is 5-10S, which is 5S in this embodiment. And the cooling effect is further ensured by arranging air cooling.
EXAMPLE seven
The difference of this embodiment and embodiment six lies in, is equipped with between first water-cooling portion and the outer covering die 9 and cleans the portion, cleans the portion and includes the frame and fix the centre gripping arm in the frame, is provided with the circular port on the centre gripping arm, is provided with the round recess on the pore wall of circular port, and the recess inside callipers is equipped with the sponge, and the center of sponge is provided with the through-hole that the cable that supplies the cladding to have interior protective layer 3 passes for dry its surperficial water, make things convenient for follow-up continuation to carry out the cladding of outer protective layer 4.
Example eight
The difference between the embodiment and the seventh embodiment is that the clamping arm comprises an upper arm and a lower arm, the lower arm is welded and fixed with the rack, and a lifting rod is fixed on the upper arm; the lower surface of the upper arm is provided with a C-shaped groove, and the upper surface of the lower arm is provided with a clamping groove for placing sponge; the groove arm of the C-shaped groove is also provided with an arc-shaped groove for placing the sponge. The lifter comprises an outer barrel and a slide rod connected in the outer barrel in a sliding manner, the lower end of the outer barrel is fixedly welded with the rack, and a plurality of positioning holes are formed in the outer barrel and the slide rod.
When the device is used, sponges are placed in the clamping groove and the arc-shaped groove, then the cable coated with the inner protection layer 3 is placed on the sponges on the upper surface of the lower arm, the height of the upper arm is adjusted through the lifting rod, and positioning is achieved by inserting pins into the positioning holes; the sponge at the C-shaped groove of the upper arm is contacted with the cable; when the cable is led forwards, water stains on the surface of the cable can be wiped dry through the sponge. The above are only examples of the present invention, and the present invention is not limited to the field related to the embodiment, and the general knowledge of the specific structure and characteristics of the scheme is not described herein. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (7)
1. The production device of the fireproof flame-retardant cable is characterized by comprising an inner coating die, wherein the inner coating die comprises an inner core die and an inner coating die which is coaxially arranged with the inner core die; a channel is arranged in the inner core die; an inner coating cavity is formed in the inner coating film, one end of the inner core mold extends into the inner coating cavity, and a discharge hole and a material injection channel communicated with the inner coating cavity are formed in the inner coating cavity; a circle of inner bulges are arranged in the inner coating cavity, and a diaphragm gap is formed between the inner bulges and the circumferential cavity wall of the inner coating cavity;
the outer cladding die comprises an outer core die and an outer cladding die which is coaxial with the outer core die; a channel is arranged in the outer core mould, and the inner diameter of the channel of the outer core mould is larger than that of the channel of the inner core mould; an outer coating cavity is arranged in the outer coating cavity, and the inner diameter of the outer coating cavity is larger than that of the inner coating cavity; an outer bulge is arranged in the outer coating cavity, and a stable layer gap is arranged between the outer bulge and the circumferential cavity wall of the outer coating cavity; the outer bulge and the inner bulge are arranged in a staggered manner;
the width of the gap of the stabilizing layer is more than or equal to 2mm;
the width of the diaphragm gap is larger than or equal to 0.5mm, and the width of the diaphragm gap is smaller than that of the stable layer gap.
2. The production device of the fireproof flame-retardant cable according to claim 1, wherein: the material injection channel comprises an end material injection channel and a circumferential material injection hole, and the circumferential material injection hole is positioned on the circumferential outer wall of the inner covering die; the end injection channel is positioned at the end part of the inner covering film.
3. The production device of the fireproof flame-retardant cable according to claim 2, wherein: one side of the inner coating cavity is provided with an opening to form the discharge hole; an end plate is arranged on the other side of the inner cladding cavity, a circular truncated cone-shaped hole is formed in the center of the end plate, one end of the inner core die extends into the inner cladding cavity from the circular truncated cone-shaped hole, and a material end injection channel is formed between the inner core die and the hole wall of the circular truncated cone-shaped hole.
4. The production device of the fireproof flame-retardant cable according to claim 3, wherein: an inflation channel is arranged in each of the inner bulge and the outer bulge, and one end of the inflation channel extends to the end face of the inner bulge, which is far away from one end of the inner core die, so that an inflation opening is formed; the other end of the inflation channel extends to the outer wall of the inner covering die to form an air inlet.
5. The production device of the fireproof flame-retardant cable according to claim 4, wherein: the cross sections of the inner and outer bulges are fan-shaped.
6. The production device of a fireproof flame-retardant cable according to claim 5, wherein: a first water cooling part is arranged between the inner cladding die and the outer cladding die, and a second water cooling part is arranged behind the outer cladding die.
7. The production device of a fireproof flame-retardant cable according to claim 6, wherein: a wiping part is arranged between the first water cooling part and the outer coating die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110219128.7A CN113021830B (en) | 2021-02-26 | 2021-02-26 | Production device of fireproof flame-retardant cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110219128.7A CN113021830B (en) | 2021-02-26 | 2021-02-26 | Production device of fireproof flame-retardant cable |
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| CN113021830A CN113021830A (en) | 2021-06-25 |
| CN113021830B true CN113021830B (en) | 2022-12-27 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB811703A (en) * | 1954-07-12 | 1959-04-08 | Shardlow Electrical Wires Ltd | Electric cables and method of and means for manufacturing same |
| US4740261A (en) * | 1986-09-25 | 1988-04-26 | American Telephone And Telegraph Company, At&T Technologies, Inc. | Extrusion methods and apparatus |
| CN207704895U (en) * | 2017-12-29 | 2018-08-07 | 深圳市优聚新能源科技有限公司 | A kind of high flexibility fire prevention single-core cable with ceramic composite band |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2902527B2 (en) * | 1992-10-30 | 1999-06-07 | 日立電線株式会社 | Method of manufacturing cable for laying in pipeline |
| FR2919750B1 (en) * | 2007-08-02 | 2016-01-08 | Axon Cable Sa | COAXIAL CABLE HAVING A LOW DIELECTRIC CONSTANT AND METHOD AND TOOL FOR MANUFACTURING THE SAME |
| JP5472723B2 (en) * | 2010-01-08 | 2014-04-16 | 日立金属株式会社 | Coating dies for flat enameled wire and manufacturing method of flat enameled wire |
| DE102015209394A1 (en) * | 2015-05-22 | 2016-11-24 | Leoni Kabel Holding Gmbh | Method and device for producing stranded and extruded material |
| JP6756522B2 (en) * | 2016-05-25 | 2020-09-16 | トヨタ自動車株式会社 | Molding equipment |
| IT201600120563A1 (en) * | 2016-11-29 | 2018-05-29 | Gimac Di Maccagnan Giorgio | EXTRUDER FOR MULTI-LUMINAIRES OR MICRO-MANUFACTURED ITEMS WITH MULTI-CORONAL ARRANGEMENT |
| CN209747209U (en) * | 2019-05-09 | 2019-12-06 | 安徽凌宇电缆科技有限公司 | single-layer insulation single-core fire-resistant cable and special production mold thereof |
| CN212411650U (en) * | 2020-06-15 | 2021-01-26 | 宝上电缆有限公司 | Fireproof flame-retardant cable |
-
2021
- 2021-02-26 CN CN202110219128.7A patent/CN113021830B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB811703A (en) * | 1954-07-12 | 1959-04-08 | Shardlow Electrical Wires Ltd | Electric cables and method of and means for manufacturing same |
| US4740261A (en) * | 1986-09-25 | 1988-04-26 | American Telephone And Telegraph Company, At&T Technologies, Inc. | Extrusion methods and apparatus |
| CN207704895U (en) * | 2017-12-29 | 2018-08-07 | 深圳市优聚新能源科技有限公司 | A kind of high flexibility fire prevention single-core cable with ceramic composite band |
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