CN1232853C - Liner for optical cable and its making process and optical cable with the liner - Google Patents
Liner for optical cable and its making process and optical cable with the liner Download PDFInfo
- Publication number
- CN1232853C CN1232853C CNB011429348A CN01142934A CN1232853C CN 1232853 C CN1232853 C CN 1232853C CN B011429348 A CNB011429348 A CN B011429348A CN 01142934 A CN01142934 A CN 01142934A CN 1232853 C CN1232853 C CN 1232853C
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- Prior art keywords
- spacer
- lining
- optical fiber
- helicla flute
- flange
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/441—Optical cables built up from sub-bundles
- G02B6/4413—Helical structure
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4401—Optical cables
- G02B6/4407—Optical cables with internal fluted support member
- G02B6/4408—Groove structures in support members to decrease or harmonise transmission losses in ribbon cables
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/4471—Terminating devices ; Cable clamps
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
A method for manufacturing a spacer for an optical fiber cable by which a groove inclination of a spiral groove housing an optical fiber is controlled. A coated high-tensile wire 4 in which a preliminary coating layer is provided in the outer periphery of a high-tensile body is pre-heated by passing through a heating tank 5, thereafter the wire is introduced into an extruder 7 having a rotating die 6 corresponding to the cross section shape of the spacer, the wire is guided to a cooling zone 9 to cool it after rotating, extruding and coating a spacer main body resin layer at prescribed speed, and whereby a PE spacer 10 is obtained. Three stages of ring shaped air nozzles are set up in the cooling zone 9 along the running direction of the spacer 10. Air is almost orthogonally brown out of the nozzles toward the spacer 10 and is brown against the groove bottom of the spacer 10, and the root part of a rib is cooled preferentially more than the middle part. The spacer 10 is specified by nearly 1.5 mm in the minimum rib thickness at the root of the rib demarcating the spiral groove, 11.9 degrees in the advancing angle and nearly 15 degrees in the groove inclination angle &alpha .
Description
Technical field
The invention relates to spacer for optical fiber cable (ス ペ one サ), use the technology at notch inclination angle of spiral fluted counter-rotating portion of the manufacture method, particularly relevant controlling up-winding fiber of fiber optic cables and this lining of this lining.
Background technology
For price and the laying cost that reduces fiber optic cables, the research of the densification of the pathization of optical fiber, lightweight, light has obtained remarkable progress, and the diameter of the spacer for optical fiber cable made from tygon (PE) material of therefore being strict with up-winding fiber is also little, groove is wanted deeply.
In addition, for the fiber optic cables of empty frame, except that requiring to have the high optical density, the branch's performance that has begun the requirement optical fiber connector will be got well, and in order to satisfy these requirements, has used SZ type fiber optic cables in a large number.This fiber optic cables use the lining of being made by polythene material, and the spiral fluted rotation direction of up-winding fiber is periodically counter-rotating (SZ type) on the lining, and contains many band shapes or single-core fiber in each helicla flute.
When in SZ type lining, accommodating hard straight light belt (テ one プ), should guarantee only to form the essential space of light belt as the size of accepting groove.
In addition, constitute the used polyvinyl resin of spiral fluted flange, when extrusion modling, can produce three-dimensionally shaped contraction, the contraction and because the summation of the volumetric contraction that temperature decline causes that produce of crystallization again when promptly tygon solidifies.
When such moulding contraction takes place, different with the helicla flute of twisting at the unidirectional volume that does not vertically have allowance for shrinkage, when SZ type lining, only at the counter-rotating position, can be implemented in the rotation direction counter-rotating vertically shrinks with the flange of walking prompt nearly form, its structure causes at the inboard flange of rotation direction counter-rotating to produce like this.
And helicla flute flange high more (groove is dark more), this tilt phenomenon is just serious more, and this problem and aforementioned helicla flute will guarantee the problem in enough spaces, all are that SZ type lining spiral fluted principal element is deepened in restriction.
By the way, about the inclination of flange, except the moulding of resin was shunk, when nozzle was extruded, because the difference of the condition of resin wear etc., the stress that produces between the coated with resin also was a reason.
Summary of the invention
In view of above existing problem, purpose of the present invention is exactly can suppress fiber optic cables with the inclination of band SZ type spiral fluted lining at counter-rotating portion groove, loss is worsened and the groove depth that can realize deepening SZ shape lining.
In order to address the above problem, the present invention takes following technical scheme:
A kind of spacer for optical fiber cable, the body overlayer of this lining is overlayed on the periphery of intermediate cover layer, this bush body, around the tension element of center, implement intermediate cover layer with thermoplastic resin, and have and longitudinally periodically reverse and helicla flute that longitudinally continuous up-winding fiber is used, it is characterized in that: above-mentioned helicla flute, the minimum thickness that constitutes the flange of its side are at 1.5 ~ 1.85 millimeters, groove depth is 2.5 ~ 2.8 millimeters, and maximum helix angle is at 8.3 ° ~ 11.9 °.
Described spacer for optical fiber cable is characterized in that: above-mentioned helicla flute, the notch inclination angle of the lining transversal section of its counter-rotating portion is between 12 ° ~ 18 °.
Described spacer for optical fiber cable is characterized in that: constitute the flange of above-mentioned helicla flute side, be set as from its root to top ends, its density gradient increases gradually.
Described spacer for optical fiber cable is characterized in that: above-mentioned density gradient is that the resin density of its root is compared comparatively minimum with the resin density at top ends and middle part.
A kind of fiber optic cables is characterized in that: used as technical scheme 1 or 4 described spacer for optical fiber cable, at least more than one the above-mentioned helicla flute, contained the optical fiber of band shape etc.
A kind of manufacture method of spacer for optical fiber cable, the body overlayer of this lining is overlayed on the periphery of intermediate cover layer, this bush body, around the tension element of center, implement intermediate cover layer with thermoplastic resin, and have and longitudinally periodically reverse and helicla flute that longitudinally continuous up-winding fiber is used, it is characterized in that: after the above-mentioned bush body moulding, from leaving the position of above-mentioned lining periphery certain distance, by the tempering air nozzle, the above-mentioned lining of dry air is blowed to the periphery that is approximately perpendicular to above-mentioned lining and cool off.
The manufacture method of described spacer for optical fiber cable is characterized in that: above-mentioned tempering air nozzle is relative to the lining that moves with certain speed, and is along the moving direction of above-mentioned lining, spaced apart and multistage is set.
The manufacture method of described spacer for optical fiber cable is characterized in that: with the cooling of above-mentioned tempering air nozzle, the flange in the above-mentioned helicla flute of formation side has precedence over its root portion and carries out earlier.
The manufacture method of described spacer for optical fiber cable is characterized in that: be provided with the lining tension element of above-mentioned intermediate cover layer, preheating and import and form the tectal extruder of above-mentioned body.
The manufacture method of described spacer for optical fiber cable is characterized in that: above-mentioned intermediate cover layer is selected the hot plastic type resin that intermiscibility is arranged with tygon for use.
The present invention is covered with thermoplastic resin material intermediate cover layer with the job operation of extrusion modling around the tension element of center; Periphery in above-mentioned intermediate cover layer is covered with the bush body overlayer, offers helicla flute longitudinally continuous, that up-winding fiber is used in this bush body overlayer, and the periodically counter-rotating longitudinally of this spiral fluted rotation direction; The minimum thickness of above-mentioned helicla flute flange is more than 1.0 millimeters, and groove depth is more than 2.0 millimeters, and maximum helix angle is more than 8 °.
At this, helix angle of the present invention is described: as shown in Figure 5, offer many helicla flutes on the lining, the angle theta between this helicla flute and the lining longitudinal axis or the axle in parallel is defined as helix angle among the present invention, and its maximal value is maximum helix angle.
In the xsect at lining helicla flute rotation direction counter-rotating position, above-mentioned spiral fluted notch inclination angle can be controlled at below 18 °.
In spacer for optical fiber cable of the present invention, above-mentioned spiral fluted flange, its density of material increases to the top gradually from nearly root, compares with the resin density at top and middle part, near the resin density minimum of root.
The spacer for optical fiber cable that adopts said method to make has the optical fiber that contains band shape or other shapes in one or more the helicla flute at least above it.
In addition, in the manufacture method of spacer for optical fiber cable of the present invention, (the body overlayer of this lining is overlayed on the periphery of intermediate cover layer to above-mentioned bush body overlayer, offer helicla flute longitudinally continuous, that up-winding fiber is used in the body overlayer, its rotation direction is longitudinally periodically reverse; Above-mentioned intermediate cover layer is made with the thermoplastic resin material, overlayed on the center tension element around) after the moulding, leave in above-mentioned lining periphery on the position of certain distance and place the cooling air nozzle; Dry air cools off lining with the periphery that approximately perpendicular direction blows to above-mentioned lining.
Above-mentioned cooling is aimed at the lining that advances with certain speed with air nozzle, is provided with some groups along the working direction of above-mentioned lining, group with organize between spaced apart.
Make spacer for optical fiber cable with such method, after the moulding of bush body overlayer, cool off with the following method: leave in above-mentioned lining periphery and place cooling on the position of certain distance and use air nozzle, dry air blows to above-mentioned lining with approximately perpendicular direction.
In this cooling means, dry air can directly blow to the spiral fluted bottom of trench, and the root that makes the helicla flute flange is than the preferential in advance cooling in middle part, can prevent effectively that therefore the helicla flute flange from swinging to the inboard of back-flexing place; Can make the less lining of diameter, the minimum thickness of helicla flute flange is more than 1.0 millimeters in this lining, and groove depth is more than 2.0 millimeters, and maximum helix angle is more than 8 °, and the notch inclination angle of its rotation direction counter-rotating transversal section, position is below 18 °.
In addition, if the notch inclination angle below 18 °, when up-winding fiber is made fiber optic cables in the helicla flute, can reduce conduction loss.
In the present invention, the center tension element of the above-mentioned intermediate cover layer that has been covered can import the tectal extrusion moulding machine of the above-mentioned body of processing after preheating.
In addition, in the present invention, the material of above-mentioned intermediate cover layer can be selected tygon for use or have the hot plastic type resin of intermiscibility with tygon.
Brief description of drawings
In Fig. 1 spacer for optical fiber cable manufacture method involved in the present invention, the key diagram of the major part of manufacturing process
The further explanatory drawings of the air nozzle that Fig. 2 manufacture method shown in Figure 1 is used
Fig. 3 is with the made sectional drawing that obtains spacer for optical fiber cable of manufacture method shown in Figure 1
The key diagram of the notch inclination alpha of Fig. 4 spacer for optical fiber cable
Fig. 5 lining spiral fluted helix angle key diagram
The specific embodiment of the present invention
Illustrate preferred forms of the present invention below:
Embodiment 1:
With 7 external diameters is that the steel wire of 1.4 millimeters of φ twists into one steel cable and imports in the crosshead (Network ロ ス ヘ Star De) as tension element 1.Periphery at this tension element 1 is pushed standby inner covering layer 2 of lining and standby outer cover 3 together with 200 ℃ temperature, and tensile cord 4 obtains being covered.This inner covering layer 2 is ethylene-propylene acetoacetic ester (エ チ レ Application one エ チ Le ア Network Le one ト) copolymer resin (GA-006, Japan ユ ニ カ one produces), this outer cover 3 is straight chain shape ldpe resin (NUC65350, Japan ユ ニ カ one produces), this lining tensile cord 4 is that the external diameter of ethylene-ethyl acrylate copolymer resin bed is that the lining external diameter of the polyvinyl resin of 4.8 millimeters of φ, its periphery is 9.7 millimeters of φ.
As shown in Figure 1, above-mentioned lining tensile cord 4 is carried out preheating by heating tank 5, make the appearance temperature of its lining tension element reach 60 ℃.Then, the tension element that will be covered is drawn in extruder 7, is equipped with in the extruder 7 and the corresponding rotary die 6 of lining section configuration.Formation resin as bush body resin bed 8, with the high-density polyethylene resin (Hizex6600M, Mitsui Chemicals production) of MI=0.03 (g/10min), after 6 meters/minute speed rotation extruding lining, through cooling zone 9 cooling, obtain external diameter and be 15.7 millimeters PE lining 10.
As shown in Figure 2, in the cooling zone 9, annular air nozzle 11 is along the moving direction of lining 10, be set up three sections every 300 millimeters.
The used air nozzle 11 of this example has: the 11a of nozzle support sector, the annular space 11b that is arranged on nozzle support sector 11a inside and cooling jet 11c.This cooling jet 11c is looped around interior all openings of annular space 11b, most advanced and sophisticated peristome protrudes to inside.Dry air as heat eliminating medium is sent into from the outer edge side of annular space 11b.
In addition, in this case, in the above-described embodiments, the dry air amount of blowing out of each nozzle 11 of syllogic setting is set the same condition for, but for example, also may along with to back one section the dry air amount that blows out is reduced, the dry air amount that blows out of interlude is reduced.And, air nozzle 11 hop count is set, for example, can suitably select according to the size of cooling power or heat eliminating medium.
Have again, the resin discharge nozzle of rotary die 6 is to use its hole sectional area to be designed to: the value Sb/Snb that deduct sectional area Sb (Sb=Ss-St) behind the cross-sectional area St of lining tensile cord 4 with the PE lining 10 cross-sectional area Ss that will make, deducts the sectional area Snb (Snb=Sn-St) behind the cross-sectional area St of lining tensile cord 4 divided by nozzle bore sectional area Sn is 0.95.
Prepared PE lining 10, its transversal section as shown in Figure 3, the periphery of bush body overlayer 8 is provided with 8 helicla flutes 12, the groove depth of each helicla flute 12 be 2.8 millimeters, wide be 2.8 millimeters, be slightly U font, become 8 to be evenly distributed at circumferencial direction.
It is that 235 millimeters, reverse angle are 360 ° and twist into the helical structure that is the SZ shape that this helicla flute 12 has with reverse pitch; This helicla flute has the target size shape, can satisfy all size.
This tygon lining 10, the basic minimum thickness of flange that constitutes the flange 13 of helicla flute 12 is 1.5 millimeters, maximum spiral angle of travel is 11.9 °.
When measuring notch inclination angle a, the notch inclination angle can be controlled at about 15 ° fully.This notch inclination angle a is defined as shown in Figure 4.
If the notch inclination angle below 18 °, when up-winding fiber is made fiber optic cables in the helicla flute, can reduce conduction loss.
Counter-rotating portion transversal section of intercepting at PE lining 10.As the straight line L2 of central part A and groove top central part B at the bottom of a straight line L1 who connects lining center O and bottom land central part A and the link slot, this notch inclination angle a is represented by the angle between these straight lines L1 and the L2.
In addition, remove a flange 13, as shown in Figure 3 by bush body resin bed 8 formed SZ shape linings 10.From the root of flange, to the top this flange is divided into four sections after, when measuring the density of resin with density gradient column, flange root a is 0.9497, the b of flange central authorities is 0.9505, the c of flange central authorities is 0.9505, flange top d is 0.9503.
That is to say, in the present embodiment, constitute the flange 13 of the helicla flute 12 of lining 10, from beginning to top ends near root, its density gradient is set as cumulative, and it is minimum that this density gradient is compared with the resin density of top and central portion for the resin density of root roughly.
Then, in each helicla flute 12 of this SZ shape lining 10, accommodate the twin-core ribbon fiber of 8 0.4 millimeters thick, 0.6 mm wide, prevent in the filling that the heart line from moving or jelly (ジ エ リ one) that water immerses after, press (giving as security さ え volume I) to carry out the overcoat lining by volume, make the SZ type fiber optic cables of 128 cores.
When measuring the optical transmission performance of these fiber optic cables, can determine that it has the good performance of 0.21～0.22dB/km.
Embodiment 2:
With 7 external diameters is that the steel wire of 1.0 millimeters of φ twists into one steel cable and imports in the crosshead (Network ロ ス ヘ Star De) as tension element 1.Periphery at this tension element 1 is pushed standby inner covering layer 2 of lining and standby outer cover 3 together with 200 ℃ temperature, and tensile cord 4 obtains being covered.This inner covering layer 2 is ethylene-propylene acetoacetic ester (エ チ レ Application one エ チ Le ア Network Le one ト) copolymer resin (GA-006, Japan You Nika produces), this outer cover 3 is straight chain shape ldpe resin (NUCG5350, Japan You Nika produces), this lining tensile cord 4 is that the external diameter of ethylene-ethyl acrylate copolymer resin bed is that the lining external diameter of the polyvinyl resin of 3.6 millimeters of φ, its periphery is 5.8 millimeters of φ.
As embodiment 1, above-mentioned lining tensile cord 4 by heating tank 5, is preheating to 60 ℃, then, draw in extruder 7, be equipped with in this extruder 7 and the corresponding rotary die 6 of lining section configuration.Formation resin as bush body resin bed 8, with the high-density polyethylene resin (Hizex6600M, Mitsui Chemicals production) of MI=0.03 (g/10min), after 7.5 meters/minute speed rotation extruding lining, through cooling zone 9 cooling, obtain external diameter and be 11.2 millimeters PE lining 10.
As embodiment 1, in the cooling zone 9, be arranged to the air nozzle 11 of syllogic.In addition, the resin ejection nozzle of rotary die 6, use is such the foregoing description 1 explanation, and being designed to the Sb/Snb value is 0.93.
The root minimum thickness of the flange of this PE lining 10a is 1.85 millimeters, and maximum helix angle is 8.3 °.
When measuring the notch inclination angle a of counter-rotating portion transversal section of PE lining 10a, be enough to notch is tilted to be controlled at about 12 °.
Moreover, remove the flange of the formed SZ shape of bulk resin layer lining 10a, root from flange, this is divided into four parts to the top, when measuring the density of each section resin with density gradient column, flange root a is 0.9496, flange central portion b is 0.9503, flange central portion c is 0.9504, flange top d is 0.9502.
Then, the same with embodiment 1, in each groove, accommodate the twin-core belt light-transmitting fibre of 4 0.4 millimeters thick, 0.6 mm wide, jelly in the filling is compressed into capable overcoat lining by volume, makes the SZ type fiber optic cables of 48 cores.After measured, these fiber optic cables have the good optical transmission performance of 0.20～0.22dB/kmd.
Embodiment 3:
The single steel wire that with external diameter is 2.6 millimeters imports in the crosshead as tension element.In the periphery of this tension element, push standby inner covering layer 2 of lining and standby outer cover together with 200 ℃ temperature, tensile cord 4a obtains being covered.This inner covering layer is ethylene-propylene acetoacetic ester (エ チ レ Application one エ チ Le ア Network Le one ト) copolymer resin (GA-006, Japan You Nika produces), this outer cover is straight chain shape ldpe resin (NUCG5350, Japan You Nika produces), this lining tensile cord 4a is that the external diameter of ethylene-ethyl acrylate copolymer resin bed is that the lining external diameter of the polyvinyl resin of 3.2 millimeters of φ, its periphery is 4.5 millimeters of φ.
As embodiment 1, above-mentioned lining tensile cord 4a by heating tank 5, is preheating to 60 ℃, then, draw in extruder 7, be equipped with in this extruder 7 and the corresponding rotary die 6 of lining section configuration.As bush body resin bed 8 formation resins, with the high-density polyethylene resin (Hizex6600M, Mitsui Chemicals production) of MI=0.03 (g/10min), after the speed rotation extruding lining with 7m/min, through cooling zone 9 coolings, obtaining external diameter is the PE lining 10b of 10.2mm.
As embodiment 1, in the cooling zone 9, be arranged to the air nozzle 11 of syllogic.In addition, the resin ejection nozzle of rotary die 6, use is such the foregoing description 1 explanation, and being designed to the Sb/Snb value is 0.94.
The PE lining 10b that is obtained has 5 along the circumferential direction average helicla flutes of arranging 12, and each helicla flute 12 is 2.5 millimeters of groove depths, 3.0 millimeters of groove widths, is slightly U font.It is 150 millimeters that this helicla flute 12 has with the antitrochanter distance, and the angle of twist is 270 °, is the structure of SZ shape, and the size shape of the target made is arranged, and can satisfy all size.
The root minimum thickness of the flange of this PE lining 10b is 1.85 millimeters, and maximum helix angle is 8.3 °.
When measuring the notch inclination angle a of counter-rotating portion transversal section of PE lining 10a, so that notch is tilted fully to be controlled at about 13 °.
Moreover, remove the flange of the formed SZ shape of bulk resin layer lining 10ab, root from flange, this is divided into four parts to the top, when measuring the density of each section resin with density gradient column, flange root a is 0.9498, flange central portion b is 0.9505, flange central portion c is 0.9504, flange top d is 0.9503.
Then, the same with embodiment 1, in each groove, accommodate 4 core belt light-transmitting fibres of 5 0.40 millimeters thick, 1.1 mm wides, jelly in the filling is compressed into capable overcoat lining by volume, makes the SZ type fiber optic cables of 100 cores.After measured, these fiber optic cables have the good optical transmission performance of 0.22dB/km.
Embodiment 4:
With aromatic polyamide fibre (ケ Block ラ one 3120dtex: eastern レ デ ユ Port Application company produces) as reinforcing fibre, to its dipping ethene fat resin (エ ス one H-6400, Mitsui Chemicals is produced), contraction is shaped to 4.5 millimeters of external diameters, it is imported in the cross head mould, extruding lining LLDPE resin (NUCG5350, the outstanding Buddhist nun's blocking of Japan); After the covering resin cooling on surface, in 145 ℃ steam setting tank, making inner ethene fat hardening of resin, is 5.8 millimeters lining tensile cord 4b and obtain external diameter.
As embodiment 1, above-mentioned lining tensile cord 4ab by heating tank 5, is preheating to 60 ℃, then, draw in extruder 7, this extruder 7 is equipped with and the corresponding rotary die 6 of lining section configuration.As bush body resin bed 8 formation resins, with the high-density polyethylene resin (Hizex6600M, Mitsui Chemicals production) of MI=0.03 (g/10min), after the speed rotation extruding lining with 7.5m/min, through cooling zone 9 coolings, obtaining external diameter is the PE lining 10c of 11.2mm.
As embodiment 1, in the cooling zone 9, be arranged to the air nozzle 11 of syllogic.In addition, the resin ejection nozzle of rotary die 6, use is such the foregoing description 1 explanation, and being designed to the Sb/Snb value is 0.93.
The PE lining 10c that is obtained has 6 along the circumferential direction average helicla flutes of arranging 12, and each helicla flute 12 is 2.5 millimeters of groove depths, 2.5 millimeters of groove widths, is slightly U font.It is 240 millimeters that this helicla flute 12 has with the antitrochanter distance, and the angle of twist is 360 °, is the structure of SZ shape, and the size shape of the target made is arranged, and can satisfy all size.
The root minimum thickness of the flange of this PE lining 10c is 1.85 millimeters, and maximum helix angle is 8.3 °.
When measuring the notch inclination angle a of counter-rotating portion transversal section of PE lining 10c, so that notch is tilted fully to be controlled at about 12 °.
Moreover, remove the flange of the formed SZ shape of bulk resin layer lining 10c, root from flange, this is divided into four parts to the top, when measuring the density of each section resin with density gradient column, flange root a is 0.9497, flange central portion b is 0.9504, flange central portion c is 0.9505, flange top d is 0.9503.
Then, the same with embodiment 1, in each groove, accommodate the twin-core belt light-transmitting fibre of 4 0.40 millimeters thick, 0.6 mm wide, jelly in the filling is compressed into capable overcoat lining by volume, makes the SZ type fiber optic cables of 48 cores.After measured, these fiber optic cables have the good optical transmission performance of 0.22dB/km.
Embodiment 5:
With 7 external diameters is that steel that 1.4 millimeters steel wire volume is twisted is twisted thread and imported in the crosshead as tension element 1.In the periphery of this tension element 1, push standby inner covering layer 2 of lining and standby outer cover 3 together with 200 ℃ temperature, tensile cord 4 obtains being covered.This inner covering layer 2 is ethylene-propylene acetoacetic ester (エ チ レ Application one エ チ Le ア Network Le one ト) copolymer resin (GA-006, Japan You Nika produces), this outer cover 3 is straight chain shape ldpe resin (NUCG5350, Japan You Nika produces), this lining tensile cord 4 is that the external diameter of ethylene-ethyl acrylate copolymer resin bed is that the lining external diameter of the polyvinyl resin of 4.8 millimeters of φ, its periphery is 9.7 millimeters of φ.
As embodiment 1, above-mentioned lining tensile cord 4 by heating tank 5, is preheating to 60 ℃, then, draw in extruder 7, be equipped with in this extruder 7 and the corresponding rotary die 6 of lining section configuration.As bush body resin bed 8 formation resins, with the high-density polyethylene resin (Hizex6600M, Mitsui Chemicals production) of MI=0.03 (g/10min), after the speed rotation extruding lining with 6m/min, through cooling zone 9a cooling, obtaining external diameter is the PE lining 10d of 15.7mm.
In the cooling zone 9, the air nozzle 11 of Gou Chenging similarly to Example 1 is along the moving direction of lining 10d, be set up 4 sections every 300 millimeters.
Under the situation of present embodiment, be sent to the dry air in the annular space 11b, by each cooling jet 11c, lining 10d is generally perpendicularly with 20 meters relatively
3The wind speed of/HR blows out and cools off.
In addition, the resin ejection nozzle of rotary die 6, use is such the foregoing description 1 explanation, and being designed to the Sb/Snb value is 0.95.
The PE lining 10d that is obtained has 8 along the circumferential direction average helicla flutes of arranging 12, and each helicla flute 12 is 2.8 millimeters of groove depths, 2.8 millimeters of groove widths, is slightly U font.It is 235 millimeters that this helicla flute 12 has with the antitrochanter distance, and the angle of twist is 360 ° of structures that are the SZ shape, and the size shape of the target made is arranged, and can satisfy all size.
The root minimum thickness of the flange of this PE lining 10d is 1.5 millimeters, and maximum helix angle is 11.9 °.
When measuring the notch inclination angle a of counter-rotating portion transversal section of PE lining 10d, so that notch is tilted fully to be controlled at about 14 °.
Moreover, remove the flange of the formed SZ shape of bulk resin layer lining 10c, root from flange, this is divided into four parts to the top, when measuring the density of each section resin with density gradient column, flange root a is 0.9498, flange central portion b is 0.9505, flange central portion c is 0.9506, flange top d is 0.9504.
Then, the same with embodiment 1, in each groove, accommodate the twin-core belt light-transmitting fibre of 8 0.4 millimeters thick, 0.6 mm wide, jelly in the filling is compressed into capable overcoat lining by volume, makes the SZ type fiber optic cables of 128 cores.After measured, these fiber optic cables have the good optical transmission performance of 0.21dB/km.
Comparative example 1
Cooling means as the bush body resin, being passed on one side the exit has SUS conduit O-ring seal, 75 millimeters of long 1 meters, internal diameter in 16.5 millimeters in aperture, the interior warm water that injects 40 ℃ from the below of pipe of Bian Zaiguan, make and add interface catalyzer (マ one Port Application FL-30, the production of this grease of pine company) concentration becomes 0.1%, water is overflowed from the top of pipe, carry out cooling curing thus.Except that the method, usefulness method manufacturing external diameter similarly to Example 1 is 15.7 millimeters a PE lining.
Though its cross dimensions of SZ type lining, antitrochanter distance and the reverse angle and the embodiment's 1 of cooling curing is just the same in this way, when measuring the notch inclination angle a of counter-rotating cross section, be about 25 °, promptly notch tilts serious.
Moreover, remove a flange of the formed SZ shape of bulk resin layer lining 1, root from flange, this is divided into four parts to the top, when measuring the density of each section resin with density gradient column, flange root a is 0.9512, flange central portion b is 0.9511, flange central portion c is 0.9508, flange top d is 0.9503.
Then, the same with embodiment 1, in each groove, accommodate 8 twin-core belt light-transmitting fibres respectively, jelly in the filling is compressed into capable overcoat lining by volume, makes the SZ type fiber optic cables of 128 cores.After measured, these fiber optic cables have the good optical transmission performance of 0.25～0.55dB/km.
Effect of the present invention:
It is such that above-described embodiment illustrates, uses with the fiber optic cables that manufacture method of the present invention is made Lining and the fiber optic cables that use this lining can incline at the notch of effectively controlling inversion portion Tiltedly, can loss be worsened, can realize deepening the degree of depth of the groove of SZ shape lining.
Claims (6)
1. spacer for optical fiber cable, the body overlayer of this lining is overlayed on the periphery of intermediate cover layer, this bush body, around the tension element of center, implement intermediate cover layer with thermoplastic resin, and have and longitudinally periodically reverse and helicla flute that longitudinally continuous up-winding fiber is used, it is characterized in that: above-mentioned helicla flute, the minimum thickness of flange that constitutes its side is between 1.5 ~ 1.85 millimeters, groove depth is between 2.5 ~ 2.8 millimeters, and maximum helix angle is between 8.3 ° ~ 11.9 °.
2. spacer for optical fiber cable as claimed in claim 1 is characterized in that: above-mentioned helicla flute, the notch inclination angle of the lining transversal section of its counter-rotating portion is between 12 ° ~ 18 °.
3. spacer for optical fiber cable as claimed in claim 1 or 2 is characterized in that: constitute the flange of above-mentioned helicla flute side, be set as from its root to top ends, its density gradient increases gradually.
4. spacer for optical fiber cable as claimed in claim 3 is characterized in that: above-mentioned density gradient is that the resin density of its root is compared comparatively minimum with the resin density at top ends and middle part.
5. fiber optic cables is characterized in that: used spacer for optical fiber cable as claimed in claim 1, and at least more than one above-mentioned helicla flute, contained the optical fiber of band shape etc.
6. fiber optic cables is characterized in that: used spacer for optical fiber cable as claimed in claim 4, and at least more than one above-mentioned helicla flute, contained the optical fiber of band shape etc.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP374477/2000 | 2000-12-08 | ||
| JP2000374477A JP3924426B2 (en) | 2000-12-08 | 2000-12-08 | Manufacturing method of spacer for optical fiber cable |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100652434A Division CN100339734C (en) | 2000-12-08 | 2001-11-30 | Method for manufacturing the spacer for optical fiber cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1357773A CN1357773A (en) | 2002-07-10 |
| CN1232853C true CN1232853C (en) | 2005-12-21 |
Family
ID=18843661
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100652434A Expired - Lifetime CN100339734C (en) | 2000-12-08 | 2001-11-30 | Method for manufacturing the spacer for optical fiber cable |
| CNB011429348A Expired - Lifetime CN1232853C (en) | 2000-12-08 | 2001-11-30 | Liner for optical cable and its making process and optical cable with the liner |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100652434A Expired - Lifetime CN100339734C (en) | 2000-12-08 | 2001-11-30 | Method for manufacturing the spacer for optical fiber cable |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP3924426B2 (en) |
| KR (1) | KR20020045520A (en) |
| CN (2) | CN100339734C (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5505594B2 (en) * | 2009-03-11 | 2014-05-28 | 株式会社リコー | Optical scanning apparatus and image forming apparatus |
| JP5593952B2 (en) * | 2010-08-20 | 2014-09-24 | 住友電気工業株式会社 | Manufacturing method and manufacturing apparatus for optical cable slot |
| CN105365185A (en) * | 2015-11-26 | 2016-03-02 | 南京华信藤仓光通信有限公司 | Production method and production device for SZ framework core for cable |
| KR102488172B1 (en) * | 2021-12-24 | 2023-01-19 | 주식회사 그린피앤피 | Forming apparatus double wall sewer pipe and Double wall sewer pipe manufacturing equipment included the same |
| CN115371388B (en) * | 2022-06-05 | 2024-04-02 | 山东基舜新材料科技有限公司 | Heating device for be used for new material processing |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4022131A1 (en) * | 1990-07-11 | 1992-01-16 | Kabelmetal Electro Gmbh | METHOD AND DEVICE FOR DRAWING AN OPTICAL FIBER FROM A SOLID PREFORM |
| JPH10226531A (en) * | 1997-02-10 | 1998-08-25 | Furukawa Electric Co Ltd:The | Optical fiber drawing device |
| JPH10232334A (en) * | 1997-02-21 | 1998-09-02 | Fujikura Ltd | Method for falling coated optical fibers into filamentary body with sz groove |
| FI114046B (en) * | 1997-06-06 | 2004-07-30 | Mtg Meltron Ltd Oy | Method and light generation device in the use of optical fiber |
| JPH11190813A (en) * | 1997-12-25 | 1999-07-13 | Ube Nitto Kasei Co Ltd | Spacer for optical fiber cable and spacer manufacturing method |
-
2000
- 2000-12-08 JP JP2000374477A patent/JP3924426B2/en not_active Expired - Lifetime
-
2001
- 2001-11-16 KR KR1020010071331A patent/KR20020045520A/en not_active Application Discontinuation
- 2001-11-30 CN CNB2005100652434A patent/CN100339734C/en not_active Expired - Lifetime
- 2001-11-30 CN CNB011429348A patent/CN1232853C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CN1690751A (en) | 2005-11-02 |
| JP3924426B2 (en) | 2007-06-06 |
| JP2002174758A (en) | 2002-06-21 |
| KR20020045520A (en) | 2002-06-19 |
| CN1357773A (en) | 2002-07-10 |
| CN100339734C (en) | 2007-09-26 |
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