CN112216447A - Anti-riot compression-resistant longitudinal wrapping tape production process for cable and anti-riot compression-resistant cable - Google Patents
Anti-riot compression-resistant longitudinal wrapping tape production process for cable and anti-riot compression-resistant cable Download PDFInfo
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- CN112216447A CN112216447A CN202011059347.5A CN202011059347A CN112216447A CN 112216447 A CN112216447 A CN 112216447A CN 202011059347 A CN202011059347 A CN 202011059347A CN 112216447 A CN112216447 A CN 112216447A
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- cable
- production process
- die
- wrapping tape
- longitudinal wrapping
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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
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/1845—Sheaths comprising perforations
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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
- H01B7/18—Protection against damage caused by wear, mechanical force or pressure; Sheaths; Armouring
- H01B7/187—Sheaths comprising extruded non-metallic layers
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a production process of an anti-riot compression-resistant longitudinal wrapping tape for a cable and the anti-riot compression-resistant cable in the field of cables.
Description
Technical Field
The invention relates to the field of cables, in particular to a production process of an anti-explosion pressure-resistant longitudinal wrapping tape for a cable and the anti-explosion pressure-resistant cable.
Background
The general comparatively complicated service environment that lays of cable leads to the cable probably to suffer to heavily extrude, hard thing is pounded when running into special cases (like earthquake, house collapse etc.) in the use, and current cable construction is mostly metallic conductor outside cladding insulating material, and insulating material adopts polymer rubber more, has both guaranteed the electrical insulation performance of cable, can provide the mechanics protection in the outside for the cable conductor again, can cushion the impact that the cable received to a certain extent. However, in most of such structures, the conductor is directly covered by rubber, the usage amount of the rubber is large, and the rubber is directly filled and covered outside the conductor, so that the external force bearing capacity of the cable is insufficient, and a certain possibility of damage still exists after the cable is subjected to mechanical external force. Now, a technology capable of improving the mechanical external force bearing performance of the cable is urgently needed to be researched and developed, so that the cable has higher mechanical external force resistance.
Disclosure of Invention
The invention aims to provide a production process of an anti-explosion and anti-compression longitudinal wrapping tape for a cable, and aims to solve the problems that a cable sheath structure in the prior art is poor in mechanical external force resistance and cannot provide effective mechanical external force resistance protection for the cable.
The invention also aims to provide an anti-explosion and anti-pressure cable to solve the problem that the cable in the prior art is poor in mechanical external force resistance.
In order to achieve the first purpose, the basic technical scheme of the invention is as follows: a production process of an anti-explosion compression-resistant longitudinal wrapping tape for a cable comprises the following steps:
A. preparing materials, namely preparing the raw materials;
B. opening the die, designing and manufacturing an extrusion die, wherein the extrusion die comprises a die core and a die sleeve sleeved on the outer side of the die core, a discharge port is arranged on the die sleeve, the discharge port comprises a plurality of oval through holes arranged side by side, adjacent oval through holes are communicated through a circular through hole, and a core rod inserted into each oval through hole is arranged on the die core;
C. starting up, preparing, assembling the extrusion die on extrusion equipment, and preheating;
D. extruding and molding, namely injecting the raw materials into an extruding device and extruding and molding the raw materials through an extruding die;
E. and D, cooling, namely cooling the extruded product in the step D to room temperature to obtain the explosion-proof compression-resistant longitudinal wrapping tape for the cable.
The principle and the advantages of the scheme are as follows: the dedicated extrusion tooling structure of design manufacturing adopts the discharge gate that is formed by oval through-hole and circular through-hole connection in turn, combines the setting of core bar, makes the mould intensification and raw materials shaping temperature match through preheating, can obtain the anti-riot resistance to compression longitudinal wrapping area that the surface possesses a plurality of curved surfaces, the internal forming has a plurality of pressure buffer holes through extruding the postcooling again. Such anti-riot resistance to compression indulges bandlet possesses a plurality of oval strip main parts and columniform splice bar, and every strip main part is inside all to have the pressure buffer hole. Indulge during the use band parcel in the cable conductor outside, the radial external force bearing structure of cable is regarded as to strip main part, the inside energy-absorbing buffer structure of band is regarded as indulging in the pressure buffering hole, the connection structure between the splice bar is regarded as strip main part, when receiving mechanical external force striking in the cable use, indulge the band atress in the cable sheathing material, the pressure buffering hole atress of indulging in the band is out of shape and is cushioned offset impact force, and avoid causing the damage to the conductor at cable middle part, the band of indulging of adopting this scheme technology production can show the performance that improves the anti mechanical external force of cable like this, reduce the damage probability after the cable receives mechanical external force.
Further, in the step B, the core rod is processed into a circular rod, and the diameter of the core rod is less than or equal to half of the minor axis of the elliptical through hole. The pressure buffer hole of extruding the processing shaping in indulging the bandlet like this as preferred is the circular shape hole, has smooth inner wall, and the compression deformation back rebound elasticity is good, and external force buffering effect is excellent to circular through-hole size forms rational ratio with the strip main part size of indulging the band, guarantees to indulge the bandlet structure reliable and stable.
And furthermore, in the step B, two traction holes are formed in the mold core, the two traction holes coaxially correspond to the two circular through holes in the mold sleeve, and steel wires are arranged in the two traction holes in a penetrating mode. Adopt the steel wire to carry out the structure to indulging the band as preferredly and strengthen, draw the pore pair steel wire and lead, the steel wire can draw the raw materials at indulging the band extrusion moulding initial and evenly extrude.
Further, the diameter of the steel wire is not more than 0.5 mm. Preferably, steel wires of such a diameter are used, which, while keeping a small size, have good structural properties and effectively reinforce the structure of the longitudinal tape.
And further, in the step B, a feeding cavity of a duck beak type is processed in the die sleeve, the discharge hole is positioned at the bottom end of the feeding cavity, the outline of the die core is processed into the duck beak type, the core rod is arranged at the tip of the die core side by side, and the outline size of the die core is smaller than the outline size of the inner wall of the feeding cavity. As the preferential feeding cavity and the die core adopt the duck beak-shaped outline, the raw materials are gradually pressurized in the feeding cavity and fill the feeding cavity, the raw materials are uniformly distributed under the action of pressure, the raw materials are effectively extruded from the discharge hole, and the forming texture is uniform.
Further, a discharge gap is reserved between the tip end of the mold core and the bottom end of the feeding cavity in the step B. Preferably, the oval through holes are communicated with the discharge port through the discharge gaps, the discharge gaps are filled in the raw material extrusion process, and the raw materials are uniformly and synchronously extruded from the discharge port to form the longitudinal wrapping tape.
And further, preheating the die sleeve, the die core and the steel wire in the step C, wherein the preheating temperature of the steel wire is lower than the preheating temperature of the die sleeve and the die core. Preheating die sleeve and mold core like this as preferring can improve the mobility of raw materials in extrusion process, guarantee that the raw materials smoothly extrudes, and extrude the back texture even, the surperficial unhairing limit adopts different temperatures to preheat and can improve the adhesion of extruding in-process raw materials and steel wire to the steel wire, guarantees to indulge the effective effect of steel wire in the belting.
And further, synchronously drawing and pulling the steel wire out of the mold core in the process of extruding the raw materials in the step D. Can guarantee like this as preferred that the steel wire is connected with the raw materials is stable, and the steel wire is effectively fixed in indulging the bandlet, carries out effectual structure to indulging the bandlet and strengthens.
And further, in the step E, the extruded longitudinal wrapping belt is subjected to water cooling setting by using a room-temperature water tank. Preferably, this provides effective cooling of the formed stringer while maintaining excellent structural properties.
In order to achieve the second purpose, the invention also provides an anti-riot compression-resistant cable, wherein the sheath layer is provided with an anti-riot compression-resistant longitudinal wrapping tape which is produced and manufactured by adopting the production process of the anti-riot compression-resistant longitudinal wrapping tape for the cable, the anti-riot compression-resistant longitudinal wrapping tape comprises a plurality of strip main bodies which are arranged side by side, a connecting rib is arranged between every two adjacent strip main bodies, and a pressure buffer hole is arranged in each strip main body. By adopting the longitudinal wrapping tape as a part of the sheath layer, the cable has excellent mechanical load bearing capacity when being impacted by mechanical external force, is not easy to damage the metal wire core under the action of the mechanical external force, and has mechanical external force bearing performance obviously superior to the existing cable product.
Drawings
FIG. 1 is a longitudinal sectional view of an extrusion die in example 1 of the present invention;
FIG. 2 is a cross-sectional view of an extrusion die in example 1 of the present invention;
FIG. 3 is a front view of a die case according to example 1 of the present invention;
FIG. 4 is a cross-sectional view A-A of FIG. 3;
FIG. 5 is a cross-sectional view taken along line B-B of FIG. 3;
FIG. 6 is a front view of the mold core in example 1 of the present invention;
FIG. 7 is a cross-sectional view taken at C-C of FIG. 6;
FIG. 8 is a cross-sectional view taken along line D-D of FIG. 6;
FIG. 9 is a schematic cross-sectional view of an explosion-proof and pressure-proof cable according to embodiment 2 of the present invention;
FIG. 10 is a schematic cross-sectional view of an anti-riot and anti-pressure longitudinal wrapping tape in example 2 of the present invention.
Detailed Description
The following is further detailed by way of specific embodiments:
reference numerals in the drawings of the specification include: the die comprises a die sleeve 1, a die core 2, a feeding cavity 3, a discharging gap 4, an oval through hole 5, a round through hole 6, a core rod 7, a traction hole 8, a strip-shaped main body 9, a connecting rib 10, a pressure buffer hole 11, a steel wire 12 and an anti-explosion compression-resistant longitudinal wrapping belt 13.
A. preparing materials, namely preparing the raw materials, and selecting polyvinyl chloride plastics;
B. opening the die, designing and manufacturing an extrusion die, as shown in fig. 1 and fig. 2, comprising a die core 2 and a die sleeve 1 sleeved outside the die core 2, processing a duck beak type feeding cavity 3 in the die sleeve 1 as shown in fig. 4 and fig. 5, wherein a discharge hole is positioned at the bottom end of the feeding cavity 3, processing the outline of the die core 2 into a duck beak type as shown in fig. 7 and fig. 8, the outline of the die core 2 is smaller than the outline of the inner wall of the feeding cavity 3, and a discharge gap 4 is reserved between the tip of the die core 2 and the bottom end of the feeding cavity 3; referring to fig. 3, a discharge port is arranged on the die sleeve 1, the discharge port comprises nine oval through holes 5 arranged side by side, adjacent oval through holes 5 are communicated through a circular through hole 6, the long axes of the nine oval through holes 5 are collinear, and the circular through hole 6 is positioned between the long axis ends of the adjacent oval through holes 5; as shown in fig. 6 and 7, core bars 7 inserted into the oval through holes 5 are arranged side by side at the tip ends of the mold cores 2, the core bars 7 are processed into round bars, the diameter of the core bars 7 is less than or equal to half of the short axis of the oval through holes 5, and the core bars 7 penetrate out of the mold sleeve 1; two traction holes 8 are formed in the mold core 2, the two traction holes 8 coaxially correspond to the two circular through holes 6 in the mold sleeve 1, steel wires 12 penetrate through the two traction holes 8, and the diameter of each steel wire 12 is smaller than or equal to 0.5 mm;
C. starting up preparation, assembling an extrusion die on extrusion equipment, preheating a die sleeve 1, a die core 2 and a steel wire 12, wherein the preheating temperature of the steel wire 12 is lower than the preheating temperatures of the die sleeve 1 and the die core 2;
D. extruding and forming, namely injecting the raw materials into an extruding device to be extruded and formed through an extruding die, and synchronously drawing the steel wire 12 out of the die core 2 in the process of extruding the raw materials;
E. and D, cooling, namely performing water cooling setting on the extruded product in the step D by using a room temperature water tank, and cooling to room temperature to obtain the explosion-proof and compression-resistant longitudinal wrapping tape 13 for the cable.
In example 2, the anti-riot pressure-resistant cable is, as shown in fig. 9, provided with an anti-riot pressure-resistant longitudinal wrapping tape 13 produced and manufactured by the production process of the anti-riot pressure-resistant longitudinal wrapping tape 13 for the cable, as shown in fig. 10, the anti-riot pressure-resistant longitudinal wrapping tape 13 comprises nine strip-shaped main bodies 9 arranged side by side, a connecting rib 10 is arranged between every two adjacent strip-shaped main bodies 9, and a pressure buffering hole 11 is arranged inside each strip-shaped main body 9. The middle part of the two spaced connecting ribs 10 is embedded with a steel wire 12, and the diameter of the steel wire 12 is less than or equal to 0.5 mm.
In the production process, the mold core 2 and the mold sleeve 1 are arranged on a screw plastic extruder, the mold sleeve 1 and the mold core 2 are preheated to 165-175 ℃ before production, and the steel wire 12 in the mold core 2 is heated synchronously or independently. Polyvinyl chloride raw materials that will produce and indulge band get into die sleeve 1 and die core 2 between feeding chamber 3 after the screw rod plastic extruder heating, the raw materials passes through die core 2 and die sleeve 1's restriction guide and enters into die core 2 most advanced and feeding chamber 3 between the bottom row material clearance 4, the raw materials evenly distributed is to every oval through-hole 5 and circular through-hole 6 department and extrude from it in arranging material clearance 4, the raw materials is around 7 outsides at the core bar from the in-process of extruding in the discharge gate, and then the raw materials shaping of extruding from the discharge gate is the indulging band of nine oval main parts of cavity and eight circular connecting rib 10 constitutions, indulge the hollow hole in band and be pressure buffer hole 11. And synchronously drawing the steel wire 12 in the die core 2 after the initial extrusion so that the steel wire 12 and the raw materials are synchronously extruded. The longitudinal wrapping tape is cooled and shaped through a room-temperature water tank after being extruded and molded, and is wrapped outside the metal wire core of the cable when in use, and then the outer protective layer is extruded and molded. If receive mechanical external impact in the cable use, the impact force is used and is indulged the bandlet, indulges the bandlet on the one hand through the curved surface with impact force dispersion unload power, and on the other hand indulges the bandlet pressurized back and warp, and pressure buffer hole 11 pressurized deformation is effectively cushioned mechanical external force, and then effectively avoids the cable to be damaged by mechanical external impact striking, effectively improves the mechanical external force bearing capacity of cable.
The foregoing is merely an example of the present invention and common general knowledge in the art of specific structures and/or features of the invention has not been set forth herein in any way. 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 (10)
1. A production process of an anti-explosion compression-resistant longitudinal wrapping tape for a cable is characterized by comprising the following steps: the method comprises the following steps:
A. preparing materials, namely preparing the raw materials;
B. opening the die, designing and manufacturing an extrusion die, wherein the extrusion die comprises a die core and a die sleeve sleeved on the outer side of the die core, a discharge port is arranged on the die sleeve and comprises a plurality of oval through holes arranged side by side, adjacent oval through holes are communicated through a circular through hole, and a core rod inserted into each oval through hole is arranged on the die core;
C. starting up, preparing, assembling the extrusion die on extrusion equipment, and preheating;
D. extruding and molding, namely injecting the raw materials into an extruding device and extruding and molding the raw materials through an extruding die;
E. and D, cooling, namely cooling the extruded product in the step D to room temperature to obtain the explosion-proof compression-resistant longitudinal wrapping tape for the cable.
2. The production process of the explosion-proof and pressure-resistant longitudinal wrapping tape for the cable as claimed in claim 1, wherein the production process comprises the following steps: and in the step B, the core rod is processed into a circular rod, and the diameter of the core rod is less than or equal to half of the minor axis of the elliptical through hole.
3. The production process of the explosion-proof and pressure-resistant longitudinal wrapping tape for the cable as claimed in claim 2, wherein the production process comprises the following steps: and in the step B, two traction holes are formed in the mold core, the two traction holes coaxially correspond to the two circular through holes in the mold sleeve, and steel wires penetrate through the two traction holes.
4. The production process of the explosion-proof and pressure-resistant longitudinal wrapping tape for the cable as claimed in claim 3, wherein the production process comprises the following steps: the diameter of the steel wire is less than or equal to 0.5 mm.
5. The production process of the explosion-proof and pressure-resistant longitudinal wrapping tape for the cable as claimed in claim 4, wherein the production process comprises the following steps: and B, processing a duck beak type feeding cavity in the die sleeve, wherein the discharge hole is positioned at the bottom end of the feeding cavity, the outline of the die core is processed into a duck beak type, the core rods are arranged at the tip end of the die core side by side, and the outline size of the die core is smaller than the outline size of the inner wall of the feeding cavity.
6. The production process of the explosion-proof and pressure-resistant longitudinal wrapping tape for the cable as claimed in claim 5, wherein the production process comprises the following steps: and in the step B, a discharge gap is reserved between the tip end of the mold core and the bottom end of the feeding cavity.
7. The production process of the explosion-proof and pressure-resistant longitudinal wrapping tape for the cable as claimed in claim 6, wherein the production process comprises the following steps: and C, preheating the die sleeve, the die core and the steel wire, wherein the preheating temperature of the steel wire is lower than the preheating temperatures of the die sleeve and the die core.
8. The production process of the explosion-proof and pressure-resistant longitudinal wrapping tape for the cable as claimed in claim 7, wherein the production process comprises the following steps: and D, synchronously drawing the steel wire out of the mold core in the process of extruding the raw materials.
9. The production process of the explosion-proof and pressure-resistant longitudinal wrapping tape for the cable as claimed in claim 8, wherein: and E, performing water cooling setting on the extruded longitudinal wrapping belt by using a room-temperature water tank.
10. Anti-riot resistance to compression cable, its characterized in that: the sheath layer is provided with the anti-riot pressure-resistant longitudinal wrapping tape produced and manufactured by the anti-riot pressure-resistant longitudinal wrapping tape production process for the cable according to any one of claims 1 to 9, the anti-riot pressure-resistant longitudinal wrapping tape comprises a plurality of strip-shaped main bodies which are arranged side by side, a connecting rib is arranged between every two adjacent strip-shaped main bodies, and a pressure buffering hole is formed in each strip-shaped main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011059347.5A CN112216447B (en) | 2020-09-30 | 2020-09-30 | Anti-riot compression-resistant longitudinal wrapping tape production process for cable and anti-riot compression-resistant cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011059347.5A CN112216447B (en) | 2020-09-30 | 2020-09-30 | Anti-riot compression-resistant longitudinal wrapping tape production process for cable and anti-riot compression-resistant cable |
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| Publication Number | Publication Date |
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| CN112216447A true CN112216447A (en) | 2021-01-12 |
| CN112216447B CN112216447B (en) | 2022-04-22 |
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| CN202011059347.5A Active CN112216447B (en) | 2020-09-30 | 2020-09-30 | Anti-riot compression-resistant longitudinal wrapping tape production process for cable and anti-riot compression-resistant cable |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113450968A (en) * | 2021-06-25 | 2021-09-28 | 安徽百商百德电缆有限公司 | Processing equipment and processing method for high-efficiency tensile and torsion-resistant wind energy cable |
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| CN202584948U (en) * | 2012-04-19 | 2012-12-05 | 白银有色集团股份有限公司 | Parallel bunched cable extruding mold |
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| CN205984354U (en) * | 2016-07-15 | 2017-02-22 | 天津市元九科技有限责任公司 | Under -ground cable |
| CN209149855U (en) * | 2018-11-15 | 2019-07-23 | 东莞万丰电线电缆有限公司 | A kind of resistance to compression electric wire and its resistance to compression layer prepare mold |
| JP2020100117A (en) * | 2018-12-25 | 2020-07-02 | Ｔｏｙｏ Ｔｉｒｅ株式会社 | Mouthpiece for extrusion molding |
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2020
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US3571852A (en) * | 1966-08-30 | 1971-03-23 | John Harold Gilbert | Apparatus for forming corrugated foamed thermoplastic materials |
| CN202584948U (en) * | 2012-04-19 | 2012-12-05 | 白银有色集团股份有限公司 | Parallel bunched cable extruding mold |
| CN103928105A (en) * | 2014-05-05 | 2014-07-16 | 昆山联滔电子有限公司 | Cable |
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| CN205984355U (en) * | 2016-07-15 | 2017-02-22 | 天津市元九科技有限责任公司 | Resistance to compression type cable |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113450968A (en) * | 2021-06-25 | 2021-09-28 | 安徽百商百德电缆有限公司 | Processing equipment and processing method for high-efficiency tensile and torsion-resistant wind energy cable |
| CN113450968B (en) * | 2021-06-25 | 2022-08-30 | 安徽百商百德电缆有限公司 | Processing equipment and processing method for tensile and torsion-resistant wind energy cable |
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| CN112216447B (en) | 2022-04-22 |
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