CN1144966A - Self-hold communication cable, manufacture method and its special purpose extrusion press head - Google Patents
Self-hold communication cable, manufacture method and its special purpose extrusion press head Download PDFInfo
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- CN1144966A CN1144966A CN 95103666 CN95103666A CN1144966A CN 1144966 A CN1144966 A CN 1144966A CN 95103666 CN95103666 CN 95103666 CN 95103666 A CN95103666 A CN 95103666A CN 1144966 A CN1144966 A CN 1144966A
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Abstract
A self-supporting communication cable comprises cable core, 22-28 clusters of glass fibres and jacket, all of which are simultaneously integrated together. Its speical extruding machine uses a complex shaping mould.
Description
The present invention relates to field of cables, particularly self-hold communication cable.
What use at present is HYAC series self-hold communication cable, and this cable has been broken away from the past cable wire and added the heavy construction method of hook, thereby is widely used, and the schematic cross-section of HYAC series cable is appended shown in Figure 3.Cable wire 40 is galvanized strand wiress among the figure, and cable core 50 is HYAC series city telecommunication cable cable cores alive, and oversheath 60 is pe sheaths.Capacitor C shown in broken lines in the drawings is the parasitic capacitance between cable wire 40 and the cable core 50.Cable wire 40 is to be set in continuously in the oversheath as the built on stilts support of installing along the cable parallel longitudinal.For overcoming the twisting stress and the elasticity of cable wire, adopt the high-tension unwrapping wire in process of production; Adopt the low-tension unwrapping wire for avoiding damaging cable simultaneously, so, on same cable, have two kinds of very big structures of stress difference simultaneously, thereby make cable reverse and sustain damage along cable wire brokenly, and be difficult for correcting; On the other hand, because the existence of parasitic capacitance C, the transmission performance of cable there is certain harmful effect.Therefore must be improved the structure of above-mentioned cable, be carried out corresponding improvement for method for making and device therefor simultaneously.
The purpose of this invention is to provide a kind of self-hold communication cable, in this cable except that cable core, no longer in oversheath, there is other hardware, thereby eliminate the existence of parasitic battery, improve cable transmission performance, prevent irregular the reversing of cable core again and be mechanically damaged that the construction of cable that is provided simultaneously is simple, be convenient to produce and cable laying operation.
Another purpose of the present invention provides the method for making of the self-hold communication cable that efficient is high with adapt a kind of simple of self-hold communication cable of the present invention.
Another object of the present invention is: provide a kind of in self-bearing type communication cable method for making used special equipment, also be extrusion head.
The present invention seeks to reach like this: the self-hold communication cable that is provided is made up of cable core, 22～28 bundle glass fiber bundles and cable jacket, described glass fiber bundle vertically is evenly distributed on the outer cross-sectional periphery coaxial with it of cable core as stiffener assembly and is in together among the cable jacket with cable core, described glass fiber bundle in oversheath, distribute 22～28 the bundle, the thickness of its quantity and bundle determines have enough tensile strength to be degree can guarantee described cable in laying and using according to the cable size specification is different; Described cable jacket is enclosed in outer 22～28 bundle glass fiber bundles that also evenly are inlaid with therein of cable core outside the cable core circumference.
The method for making of self-hold communication cable provided by the present invention comprises: will carry out extrusion moulding together in extrusion head and under the heating through the cable core of unwrapping wire and vertical bag hot blast, polyethylene fusion materials flow and through the glass fiber bundle of the 22-28 bundle of unwrapping wire and preheating, the polyethylene oversheath is wrapped in outside cable core and each glass fiber bundle simultaneously, through cooling, traction and take-up promptly make self-hold communication cable of the present invention again.
Special equipment provided by the present invention is the extrusion head that is used for fusion materials flow of cable core polyethylene and glass fiber bundle extrusion moulding, this head is by the head body, shunting cover, internal layer materials flow shunting cover, internal layer core rod, outer materials flow core rod, die sleeve are formed, these described parts form compound mould in described extrusion head, finish simultaneously and embed multi beam glass fiber bundle and two kinds of technologies of cable core in cable jacket.
The present invention has good result since with glass fiber bundle as stiffener assembly, this kind glass fiber bundle multi beam evenly is bumped in the cable cover(ing) by cross-sectional periphery, vertically forming continuous support loads ability along cable cover(ing); Parasitic capacitance in the elimination prior art self-hold communication cable between cable wire and the cable core, improve the transmission performance of cable, glass fibre is soft can not cause mechanical damage to cable, designs simplification, be convenient to produce with laying and execute mutually, the factory length of glass fiber and bundle reaches 30～40 kilometers, can be directly used in continuous production cable; The method for making of self-hold communication cable of the present invention can be finished simultaneously and embed multi beam glass fiber bundle and cable core, used extrusion head high efficiency, the good product quality of gained in cable jacket.
The present invention is described in detail below in conjunction with accompanying drawing.
Accompanying drawing 1 is a self-hold communication cable sectional view of the present invention;
Accompanying drawing 2 is the glass fiber bundle and the location drawing of cable core in cable jacket;
Accompanying drawing 3 is prior art HYAC series self-hold communication cable sectional views.Narrated in leading portion.
Accompanying drawing 4 is preparation process process block diagrams of the present invention;
Accompanying drawing 5 is the special-purpose extrusion head of the present invention longitudinal section schematic diagrames;
Accompanying drawing 6 illustrates the right view of accompanying drawing 4 extrusion heads.
Accompanying drawing 1 is the utility model self-hold communication cable sectional view. From accompanying drawing 1 as seen, the utility model cable core 21,22～28 bundle glass fiber bundles 21 and cable jacket 23 form. Wherein, cable core 21 is HYAC series local cable cable cores; Described glass fiber bundle 22 is as stiffener assembly, vertically be evenly distributed on the outer cross-sectional periphery coaxial with it of cable core and be in together among the cable jacket 23 with cable core, described glass fiber bundle 22 in oversheath, distribute 22～28 the bundle, the thickness of its bundle number and bundle determines enough tensile strength is arranged as degree can guarantee described cable in laying and using according to the cable size specification is different; Described cable jacket 23 is enclosed in cable core 21 outer 22～28 bundle glass fiber bundles 22 that also vertically evenly are inlaid with therein outside the cable core circumference, the material of oversheath 23 is polyethylene.
Preparation process process block diagrams of the present invention from accompanying drawing 4. Method for making of the present invention comprises: will restraint together extrusion moulding under heating of glass fiber bundles through 22～28 of unwrapping wire, the cable core of indulging the bag hot blast, polyethylene melting materials flow and process unwrapping wire, preheating, the outer protective polyethylene cover is wrapped in outside cable core and each glass fiber bundle simultaneously, through cooling, traction and take-up namely make self-hold communication cable of the present invention again.
Vertical bag hot blast is the shielding operation of local call communication cable. Shielding material is the aluminium strip of dual coating polyethylene film, and aluminium strip forms the screen layer of tubulose sealing on the cable core surface, and cable jacket namely coats thereon. This technology belongs to the used common process of general cable, repeats no more.
Of the present invention 22～28 the bundle glass fiber bundles on the pay off rack of the bracing strut that respective number placing glass fibre tube is installed, under the control of machinery or tension controller to the glass fiber bundle unwrapping wire; Carry out The pre-heat treatment to spun the glass fibre of emitting in the tube by finished product then, preheating is provided with under the hot blast that the natural style air blast is blown in the baking oven bottom to be carried out, the natural style air blast provides 140～160 ℃ of hot blasts, in order to remove the intrafascicular moisture that may be remaining of glass fibre, glass fiber bundle is heated to 100～120 ℃ simultaneously, thereby be increased in the affinity of overlapping with outer protective polyethylene in the next step, glass fiber bundle and the cable core through heating and polyethylene melting materials flow are carried out extrusion moulding together in extrusion head and under the heating then, cable conductor is covered by in the pe sheath, glass fiber bundle also is bumped in the outer pe sheath of cable core equably simultaneously, subsequently, through the cooling of routine, traction and take-up obtain self-hold communication cable of the present invention (seeing accompanying drawing 4) again.
The special-purpose extrusion head of the present invention is used for glass fiber bundle and cable core are coated on outer protective polyethylene cover (seeing accompanying drawing 5).
Each parts of the special-purpose extrusion head of the present invention and the corresponding relation of label are as follows: 3 locking nuts, 4 adjusting nuts, 5 internal layer materials flow diversion sleeves, 6 internal layer materials flow core rods, 7 internal layer materials flow chambeies, head body 1 diversion sleeve 2 cable core chambeies, 8 outer materials flow core rod 9 die sleeves 10 die sleeves press female 11 heaters 12,13 outer materials flow chambeies, 14 molten polyethylene materials flow entrances, 15 cable core exit passageways, 16 cables to go out 17 conical bore 18 cable cores by glass fiber bundle and go out 19
Described extrusion head is by head body 1, diversion sleeve 2, internal layer materials flow diversion sleeve 6, internal layer core rod 7, outer materials flow core rod 9, die sleeve 10 forms, outer materials flow core rod 9 is the core rod of outer materials flow, it is again the die sleeve of internal layer materials flow, therefore, consisted of a sleeve forming mould of internal layer materials flow and cable core by internal layer core rod 7 and the outer materials flow core rod 9 that doubles as internal layer materials flow die sleeve, and consist of cable core by outer materials flow core rod 9 with die sleeve 10, the another set of mould of outer materials flow and glass fiber bundle, therefore, extrusion head of the present invention is compound mould, can finish simultaneously at cable core and glass fibre and coat two kinds of technologies of oversheath.
The head body 1 inner the preceding conical cavity of conehead that forms of this extrusion head, this conical cavity rear portion and conical diversion sleeve 2 tablings, outer materials flow core rod 9 rear portions separate outer materials flow chamber 14 and embed this conical cavity front portion, and this conical cavity front portion is die sleeve 10. Described head body 1 upside is provided with melting charge inflow entrance 15.
Described shunting cover 2 is conical sleeve shape, its outside joins with head body 1, along being distributed with 22～28 round taper holes 18 that glass fiber bundle is passed through on its cross-sectional circumferential, (accompanying drawing 1 and 6 only draw 18 conical bores), be provided with shunting chamber (not shown) at these shunting cover 2 outer surfaces, make from vertical polyethylene materials flow of materials flow inlet 15 to be divided into the materials flow of uniform pipe shape.
Be provided with the cable core chamber 3 by cable core and be enclosed in internal layer materials flow core rod 7 outside the described cable core chamber 3 at described head body 1 inner formed conical cavity central part, described cable core chamber 3 and internal layer materials flow core rod 7 are all cylindrical, its front end forms taper shape, cable core outlet 19 is being arranged foremost, and this cable core outlet is relative with the cable core exit passageway 16 that is surrounded by the internal layer materials flow by internal layer materials flow chamber 8.
Be provided with internal layer materials flow shunting cover 6 between shunting cover 2 and internal layer core rod 7, this internal layer materials flow shunting cover 6 is enclosed in outside internal layer materials flow core rod 7 rear portions.Have rectangular slot at internal layer materials flow shunting cover 6 front ends and outer materials flow core rod 9 places of linking with along outer materials flow core rod 9 back end circumference, this rectangular slot is in the rear portion in internal layer materials flow chamber 8, internal layer materials flow shunting cover 6 front center are conical, internal layer materials flow shunting cover 6 and internal layer core rod 7 constitute internal layer materials flow chamber 8 with outer materials flow core rod 9, and internal layer core rod 7 and double as are the mould that the outer materials flow core rod 9 of internal layer materials flow die sleeve constitutes internal layer materials flow and cable core.
It is conical that described outer materials flow core rod 9 is, be in the front end in head body 1 female cone chamber, be conical, and between internal layer materials flow chamber 8 and outer materials flow chamber 14, be provided with the exit passageway 16 that is surrounded by poly cable core at its front end, adopt the self-centering current techique, guarantee also as the outer materials flow core rod 9 of internal layer materials flow die sleeve and the concentricity of internal layer core rod 7.Be provided with and shunt cover 2 corresponding 22～28 conical bores 18 by glass fiber bundle outside within the layered material stream core rod 9, the center line in each hole intersects at the cable outlet 17 of die sleeve 10 forward along the conical taper of shunting cover 2.
Described die sleeve 10 is in the outside of head body conical cavity, its rear side also is conical cavity, outer materials flow core rod 9 embeds wherein across outer materials flow chamber 14, the cable that has been surrounded by the polyethylene materials flow comes out and glass fiber bundle meets from cable core exit passageway 16, this glass fiber bundle is by being bumped in the zone between die sleeve 10 and outer materials flow core rod 9 after shunting cover 2 and the outer materials flow core rod 9 among the pe sheath, and what come out from cable outlet 17 passages is exactly telecommunication cable of the present invention.
In addition, locking nut 4 will be shunted cover 2 and be locked on internal layer materials flow shunting cover 6.Adjust nut 5 internal layer materials flow core rod 7 is fixed on the internal layer materials flow shunting cover 6, it goes back the gap between scalable internal layer materials flow core rod 7 and the outer materials flow core rod 9, so that the size of control internal layer materials flow.Die sleeve presses female 11 die sleeve 10 is fixed on the head body 1.
Have, add right device 12 and 13 and be located at respectively outside the head body 1, so that to 1 heating of head body, make head keep constant temperature, the polyethylene fusion materials flow that keeps injecting in the head is molten condition.
When carrying out extrusion molding, machine molding machine head is heated, cable core through vertical bag hot blast enters from this extrusion head cable core chamber 3,22～28 bundle glass fibres enter from the conical bore 18 that shunting cover circumference distributes respectively, the molten polyethylene materials flow enters from materials flow inlet 15, it is divided into the materials flow of uniform pipe shape by the shunting chamber of shunting cover 2 outer surfaces, be divided into two parts through shunting cover 2 formed tubular materials flows again at the formed rectangular slot of internal layer shunting cover 4 front ends and shunting cover 2 joints, be outer materials flow and internal layer materials flow, glass fiber bundle just is evenly distributed between this two-layer materials flow when the conical bore 18 of outer materials flow core rod 9 wears out, cable core passes the back from the front end cable core in cable core chamber 3 outlet 19 and is surrounded by the internal layer materials flow, after cable core and internal layer materials flow pass from cable core exit passageway 16 together in 22～28 bundle glass fiber bundles are subjected to, outer materials flow is surrounded, thus they from cable outlet 17 pass the back just formation be embedded in the cable of cable core the oversheath and glass fiber bundle.
Embodiment
The embodiment of accompanying drawing 2 is illustration figure of glass fiber bundle and the position of cable core in cable jacket in the explanation different size cable, and each construction of cable and tensile strength relation see Table 1.In accompanying drawing 2, only symbolically be drawn into 12 bundle glass fiber bundles.In accompanying drawing 2 and table 1, d represents cable conductor external diameter (mm); N represents glass fiber bundle quantity; t
1The distance (mm) of expression oversheath and glass fiber bundle; t
2The distance of expression glass fiber bundle and cable core, D represents cable size.
Table 1
| ????d(mm) | ????n | ??t 1(mm) | ??t 2(mm) | Tensile strength (N) |
| ?????9.0 ????12 ????13 ????15 | ????22 ????24 ????24 ????26 | ????0.3 ????0.3 ????0.3 ????0.3 | ????1.4 ????1.4 ????1.4 ????1.6 | ??????11000 ??????12500 ??????12500 ??????13200 |
Claims (6)
1. self-hold communication cable, it is characterized in that: formed by cable core, 22～28 bundle glass fiber bundles and cable jacket, described glass fiber bundle vertically is evenly distributed on the outer cross-sectional periphery coaxial with it of cable core as stiffener assembly and is in together among the cable jacket with cable core, described glass fiber bundle in oversheath, distribute 22～28 the bundle, the thickness of its quantity and bundle determines have enough tensile strength to be degree can guarantee described cable in laying and using according to the cable size specification is different; Described cable jacket is enclosed in outer 22～28 bundle glass fiber bundles that also evenly are inlaid with therein of cable core outside the cable core circumference.
2. the method for making of the described self-hold communication cable of claim 1, it is characterized in that: will in extrusion head and under the heating, carry out extrusion moulding together through unwrapping wire and vertical 22～28 bundle glass fiber bundles that wrap cable core, polyethylene fusion materials flow and the process unwrapping wire and the preheating of hot blast, the polyethylene oversheath is wrapped in outside cable core and each glass fiber bundle simultaneously, again through cooling, traction and unwrapping wire promptly make self-hold communication cable.
3. according to the method for making of the described self-hold communication cable of claim 2, it is characterized in that: the preheating in baking oven of described glass fiber bundle, in baking oven, be blown into 140～160 ℃ of hot blasts, glass fiber bundle is heated to 100～120 ℃.
4. used special-purpose extrusion head in the method for making of claim 2 self-hold communication cable, it is characterized in that: described extrusion head is made up of head body, shunting cover, internal layer materials flow shunting cover, internal layer core rod, outer materials flow core rod, die sleeve, and these described parts form in described extrusion head and finish the compound mould that embeds multi beam glass fiber bundle and two kinds of technologies of cable core in cable jacket simultaneously;
Form conehead conical cavity the preceding in the inside of described head body, this conical cavity rear portion is chimeric mutually with conical shunting cover, outer materials flow mould rear portion separates outer materials flow chamber and embeds this conical cavity front portion, this conical cavity front portion is a die sleeve 10, in described head body upper end molten polyethylene materials flow inlet is arranged;
Described shunting cover is conical sleeve shape, its outside joins with head body 1, along being distributed with 22～28 conical bores that glass fiber bundle is passed through on its cross-sectional circumferential, on this shunting cover outer surface, be provided with and make the shunting chamber that is divided into the materials flow of uniform pipe shape from vertical materials flow of materials flow inlet;
The conical cavity central part that forms in described head body interior is provided with by the cable core chamber of cable core and is enclosed in internal layer materials flow core rod outside the described cable core chamber, described cable core chamber and internal layer materials flow core rod are all cylindrical, its front end forms taper shape, be provided with the cable core outlet foremost, this cable core outlet is relative with the cable core exit passageway that is surrounded by the internal layer materials flow by internal layer materials flow chamber;
Between shunting cover and internal layer materials flow core rod, be provided with internal layer materials flow shunting cover, this internal layer materials flow shunting cover is enclosed in outside the internal layer materials flow core rod rear portion, link at internal layer materials flow shunting cover front end and outer materials flow core rod, outside outer materials flow core rod circumference, having rectangular slot, this rectangular slot is in the rear portion in internal layer materials flow chamber, internal layer materials flow shunting cover front center is conical, internal layer materials flow shunting cover and internal layer core rod constitute internal layer materials flow chamber with outer materials flow core rod, and internal layer materials flow core rod and double as are the mould that the outer materials flow core rod of internal layer materials flow die sleeve constitutes internal layer materials flow and cable core;
It is conical that described outer materials flow core rod is, be in the front end in described head body inner conical chamber, and between internal layer materials flow chamber and outer materials flow chamber, be provided with within it with described shunting and overlap corresponding 22～28 conical bores by glass fiber bundle, the center line in each hole intersects at the cable outlet of die sleeve forward along the conical taper of described shunting cover, is provided with the exit passageway that is wrapped in cable core in the polyethylene oversheath in the conical forward portion of described outer materials flow core rod;
Described die sleeve is in the front end of head body conical cavity, and its rear side is conical cavity, and outer materials flow core rod embeds wherein across outer materials flow chamber, and outflow materials flow core rod and die sleeve constitute the mould of outer materials flow and glass fiber bundle.
5. according to used special-purpose extrusion head in the described self-hold communication cable method for making of claim 4, it is characterized in that: locking nut will be shunted cover locking and be fixed on internal layer materials flow shunting and put; The whole nut of spiral shell is fixed on internal layer materials flow shunting with internal layer materials flow core rod and puts, and die sleeve presses mother that die sleeve is fixed on the head body.
6. according to used special-purpose extrusion head in the described self-hold communication cable method for making of claim 4, it is characterized in that: two heaters are located at the head body exterior respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95103666 CN1144966A (en) | 1995-04-08 | 1995-04-08 | Self-hold communication cable, manufacture method and its special purpose extrusion press head |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95103666 CN1144966A (en) | 1995-04-08 | 1995-04-08 | Self-hold communication cable, manufacture method and its special purpose extrusion press head |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1144966A true CN1144966A (en) | 1997-03-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95103666 Pending CN1144966A (en) | 1995-04-08 | 1995-04-08 | Self-hold communication cable, manufacture method and its special purpose extrusion press head |
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| CN (1) | CN1144966A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100375203C (en) * | 2002-12-18 | 2008-03-12 | 住友电气工业株式会社 | Protective tube for communication cable and communication wire |
| CN102034572A (en) * | 2010-12-15 | 2011-04-27 | 沈阳中恒新材料有限公司 | Carbon fiber composite core rod |
| CN102842390A (en) * | 2012-09-10 | 2012-12-26 | 浙江万马集团特种电子电缆有限公司 | Longitudinal wrapping and self-supporting integrated die for coaxial cable |
| CN103474147A (en) * | 2013-09-23 | 2013-12-25 | 铜陵中冠电缆有限公司 | Tension resisting deepwater flexible cable for ship and manufacturing method thereof |
| CN108363152A (en) * | 2018-01-26 | 2018-08-03 | 西安西古光通信有限公司 | A kind of inserted rodent-resistant cable of nonmetallic yarn and preparation method thereof |
| CN113787675A (en) * | 2021-08-23 | 2021-12-14 | 富通特种光缆(天津)有限公司 | Extrusion molding head and extrusion molding method |
-
1995
- 1995-04-08 CN CN 95103666 patent/CN1144966A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100375203C (en) * | 2002-12-18 | 2008-03-12 | 住友电气工业株式会社 | Protective tube for communication cable and communication wire |
| CN102034572A (en) * | 2010-12-15 | 2011-04-27 | 沈阳中恒新材料有限公司 | Carbon fiber composite core rod |
| CN102034572B (en) * | 2010-12-15 | 2012-06-27 | 沈阳中恒新材料有限公司 | Carbon fiber composite core rod |
| CN102842390A (en) * | 2012-09-10 | 2012-12-26 | 浙江万马集团特种电子电缆有限公司 | Longitudinal wrapping and self-supporting integrated die for coaxial cable |
| CN103474147A (en) * | 2013-09-23 | 2013-12-25 | 铜陵中冠电缆有限公司 | Tension resisting deepwater flexible cable for ship and manufacturing method thereof |
| CN103474147B (en) * | 2013-09-23 | 2016-10-05 | 中冠新材料科技有限公司 | Tension resisting deepwater flexible cable for ship and preparation method thereof |
| CN108363152A (en) * | 2018-01-26 | 2018-08-03 | 西安西古光通信有限公司 | A kind of inserted rodent-resistant cable of nonmetallic yarn and preparation method thereof |
| CN113787675A (en) * | 2021-08-23 | 2021-12-14 | 富通特种光缆(天津)有限公司 | Extrusion molding head and extrusion molding method |
| CN113787675B (en) * | 2021-08-23 | 2024-01-19 | 富通特种光缆(天津)有限公司 | Extrusion molding machine head and extrusion molding method |
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