The application is that name is called: optoelectrical cable of a kind of compact conformation and preparation method thereof, the applying date are: on 06 26th, 2014, application number is: the divisional application of the patent of invention of 201410293715.0.
Background technology
The contemporary society of communication industry develop rapidly, people are thick-and-thin trend for lowizationer of miniaturization and the cost more of optical, electrical cable structure, but, under the background of miniaturization, the requirement of the properties of optical, electrical cable still demand fulfillment national standard/industry standard, the normal use of such guarantee user; For this reason, huge challenge is brought to manufacturer.
Domestic following patent is mainly contained for miniaturization, the research of optical, electrical cable that simplifies the structure:
Publication number is CN101393310A, the applying date is the Chinese patent of 2008.11.05, and disclose a kind of optical fibre band optical cable, it is at least made up of obturator, fibre ribbon, protective seam and sheath; Fibre ribbon around and be coated on outside obturator, protective seam 5 around and be coated on outside fibre ribbon, sheath is coated on outside protective seam; Obturator is single bar material or composite structure; 6 optical fiber are at least comprised in fibre ribbon; Optical fiber by be positioned at center fibre core, the covering be positioned at outside fibre core, be positioned at the coat outside covering and the dyed layer be positioned at outside coat or tight sleeve layer and form; Protective seam is any one in waterstop, water blocking yarn, aluminium strip, steel band, glass fiber reinforced plastics band, aramid yarn; The material of sheath is plastics; This patent greatly reduces the occupancy of space resources, significantly reduces raw-material consumption, has saved cost significantly, reduces the spending of user, simplifies the operation of production, reduces the input of production equipment.Due to the close together between optical fiber adjacent in fibre ribbon, and the binding material of fibre ribbon itself is cured resin, is mainly ultraviolet-curing resin, ultraviolet-curing resin has lower folding quality, therefore, fibre ribbon is very easily separated in coated process, causes " loose fine " of appellation in the industry, although loose fibre does not affect optical communication performance, but make fibre ribbon can not whole welding, namely can not use optical-fiber strip welding machine, and common heat sealing machine can only be used, the progress obviously have impact on construction, continuing.
Publication number is CN103295675A, the applying date is the Chinese patent of 2013.06.08, discloses a kind of cable with simple structure and manufacture method thereof, and it is made up of many conductors, the restrictive coating that enveloped by conductor; Between two conductors of arbitrary neighborhood, there is jacket layer material; On the xsect of cable, the edge of any conductor is all positioned within the border of restrictive coating; Described many conductors along restrictive coating distribution, and are discontiguous between any two conductors; This patent has following main beneficial effect: product structure is simpler, cost is lower, manufacture more easily, manufacture in equipment investment less.It adopts insulation core wire or directly conductor is put into sheath, due to much bigger the size of the heart yearn of cable compares optical fiber, and as the material of polyethylene kind and the compatible extreme difference of optical fiber, cable tygon material generally presents alkalescence, optical fiber can be corroded quickly, make that optical fiber coloring layer fades fast, fibercuts, affect the communication of optical fiber; Therefore, this patent can not apply by optical cable technology.
Publication number is CN103105658A, the applying date is the Chinese patent of 2013.03.13, and disclose a kind of Simple type optical cable structure, it comprises skeleton body, is positioned at the reinforcement of skeleton body central authorities; Skeleton body periphery is made up of multiple bone leaf, has and can hold the fine chamber of fibre-optic appearance in each bone leaf; The periphery and the reinforcement that hold fine chamber are discontiguous; Described cable configuration is integrally formed; This patent structure is simple, and the sheath operation one-shot forming can produced at optical cable, greatly reduces operation quantity, do not need the skeleton grooves extruding skeleton cable, also do not need the SZ stranding device of layer-twisted type cable; It has following main beneficial effect: structure is simple, and equipment investment is few, easy to identify, lightweight, and cost is low.Although the optical cable in this patent reaches the simple object of structure, light transmitting fiber is spuious distribution in bone leaf, therefore the physical dimension of optical cable is larger, cost is higher; In addition, optical fiber only has skeleton body outward, and therefore, optical cable is hit, Compressive Performance is poor.
Therefore, expect to occur that more compact structure, physical dimension are less, cost is lower in industry, more can pressurized, more can bend, the optical cable that more can be hit and optoelectrical cable.
Summary of the invention
In order to solve the problem, the object of the invention is the optical cable disclosing a kind of compact conformation, disclose its method for making further, they realize by the following technical solutions.
In the invention process example 1 to embodiment 6 and embodiment 8, a kind of optical cable of compact conformation, it includes multifiber 1, reinforcing element 6, oversheath 7, it is characterized in that the many connection straps 3 that it also includes central support 2, peripheral support body 4 and is connected with peripheral support body by central support, the external space of connection strap, central support, the interior space of peripheral support body form the fine chamber 5 of multiple appearance, optical fiber is arranged in and holds fine chamber, oversheath is positioned at outside peripheral support body, and reinforcing element is in oversheath or between peripheral support body and oversheath.
In the invention process example 7, a kind of optical cable of compact conformation, it includes multifiber 1, the many insulated conductors 9 for telecommunication, reinforcing element 6, oversheath 7, it is characterized in that it also includes central support 2, peripheral support body 4 and the many connection straps 3 that central support is connected with peripheral support body, connection strap, the external space of central support, the interior space of peripheral support body forms the fine chamber 5 of multiple appearance, optical fiber is arranged in and holds fine chamber, insulated conductor for telecommunication is arranged in the fine chamber of the appearance not identical with optical fiber, oversheath is positioned at outside peripheral support body, reinforcing element is in oversheath or between peripheral support body and oversheath.
The optical cable of any one compact conformation described above, is characterized in that described reinforcing element is aramid yarn or glass fiber yarn or steel wire or copper bar or fiberglass-reinforced plastic lever.
The optical cable of any one compact conformation described above, is characterized in that the top in the described fine chamber of each appearance has a groove 8, on arbitrary xsect, each groove be fan-shaped and the axis in the excessively corresponding fine chamber of appearance, this fan-shaped summit.
The optical cable of any one compact conformation described above, is characterized in that the described fine chamber of each appearance width radially can only hold 1 ~ 2 optical fiber.
The optical cable of any one compact conformation described above, it is characterized in that inner edge radially, the described fine chamber of all appearances is circumferentially same, the fine chamber of all appearances outer rim is radially also circumferentially same, the radius of inner edge is R1, the radius of outer rim is R2, the diameter of simple optical fiber is D, R1, R2 and D meets: D < (R2-R1) < (2 × D).
The optical cable of any one compact conformation described above, is characterized in that described optical fiber is single-mode fiber or multimode optical fiber.
The optical cable of any one compact conformation described above, be is characterized in that the fine chamber of described central support, peripheral support body, connection strap, appearance is integrally formed, and is formed by extrusion molding by plastic extrusion machine head; The material of main part of described central support, peripheral support body, connection strap is all polybutylene terephthalate or polypropylene.
The optical cable of any one compact conformation described above, is characterized in that the material of described oversheath is Low Density Polyethylene or medium density polyethylene or high density polyethylene or flame-proof polyethylene or Polyvinylchloride or low smoke and zero halogen tygon or low-smoke low-halogen tygon.
Comprehensive cable of the present invention has following main beneficial effect: more compact structure, physical dimension are less, cost is lower, compression resistance/impact/bending property is stronger.
The optical cable of a kind of compact conformation of the present invention, it adopts following methods to be made:
The first step: install secondary coated extruded mould step: the mould of formation central support, peripheral support body, connection strap is arranged on plastic extrusion machine head, and compound substance or polypropylene being placed in plastic extruder, to carry out fusing to be extruded, the fine pin of leading that the insulated conductor of optical fiber/be used for telecommunication is passed through is arranged on mould rear, and makes to lead fine pin and penetrate in the fine lumen pore of appearance corresponding to mould; Described compound substance comprises the raw material of filling a prescription by following weight portion: the commercially available toughner of commercially available optical cable polybutylene terephthalate 1 part, model to be AX8000 or model be BT108Z: polybutylene terephthalate weight 2.5 ~ 4.8%, model is the UV resistant agent of PBT1731: 1.0 ~ 2.5% of polybutylene terephthalate weight;
Second step: installing optical fibres/for the insulated conductor step of telecommunication: by optical fiber/be arranged on pay-off unit for the insulated conductor of telecommunication, and the insulated conductor of optical fiber/be used for telecommunication to be penetrated in the fine lumen pore of appearance described in the first step by the optical fiber in fine chamber of appearance each in optical cable/for the quantity of the insulated conductor of telecommunication, color and sequence requirement and through extrusion head;
3rd step: extrusion molding and distraction step: output extruding machine and compound substance or polypropylene are extruded from mould front, the insulated conductor of the optical fiber in second step/be used for telecommunication is drawn together into hot water storgae simultaneously, form central support, peripheral support body, connection strap and hold fine chamber, the interior space of the external space of connection strap, central support, peripheral support body is formed and holds fine chamber, and optical fiber/for the insulated conductor of telecommunication is arranged in and holds fine chamber and form extrusion molding body; The fine chamber of each appearance width radially can only hold 1 optical fiber, inner edge radially, the fine chamber of all appearances is circumferentially same, the fine chamber of all appearances outer rim is radially also circumferentially same, the radius of inner edge is R1, the radius of outer rim is R2, the diameter of simple optical fiber is D, R1, R2 and D meets: D < (R2-R1) < (2 × D); The traction of extrusion molding body is entered cold rinse bank cooling, then adopts online blowing drying device to make extrusion molding soma dry, then form cable core on dish tool;
4th step: reinforcing element and oversheath forming step: by the core rod of gained cable core in the 3rd step through sheath extruding machine, and place reinforcing element outward at cable core and carry out oversheath extrusion molding, be coated between peripheral support body and oversheath by reinforcing element is coated in oversheath or by reinforcing element, namely obtain the optoelectrical cable of compact conformation; The material of described oversheath is Low Density Polyethylene or medium density polyethylene or high density polyethylene or flame-proof polyethylene or Polyvinylchloride or low smoke and zero halogen tygon or low-smoke low-halogen tygon; Described reinforcing element is aramid yarn or glass fiber yarn or steel wire or copper bar or fiberglass-reinforced plastic lever.
Certainly, when the material of central support described above, peripheral support body, connection strap is compound substance, can to add model be AX8000 or model be the commercially available toughner of BT108Z and model is the UV resistant agent of PBT1731, and the weight of toughner account for polybutylene terephthalate weight 2.5 ~ 4.8%, UV resistant agent accounts for 1.0 ~ 2.5% of polybutylene terephthalate weight; Through test, this kind of formula does not need the processing technology changing original polybutylene terephthalate, and greatly can increase central support, peripheral support body, the toughness of connection strap and anti-ultraviolet property, the cable core produced is placed on applicant location, shine under the daylight in August and within continuous 20 days, have no cable core cracking, and the cable core not adding above-mentioned UV resistant agent is placed on applicant location, shines under the daylight in August and just see to ftracture in cable core many places in continuous 5 days; The cable core that this kind of formula is produced, when bearing overload pressure 100%, clear-cutting forestland original state in 1 hour, and do not adopt the cable core that this fills a prescription, when bearing overload pressure 50%, restoring to the original state not yet in 48 hours, namely adopting the formula of prior art at overload pressure or after impacting, may cause the prolonged stoppage of optical fiber communication, and the meeting of the application recovers within a short period of time.
Method for making of the present invention simply, is easily grasped, and speed of production is fast, little power consumption, process costs are low.
Embodiment
embodiment 1
Ask for an interview Fig. 1 and Fig. 2, a kind of optical cable of compact conformation, it includes 9 optical fiber 1, reinforcing element 6, oversheath 7, it is characterized in that 9 connection straps 3 that it also includes central support 2, peripheral support body 4 and is connected with peripheral support body by central support, the external space of connection strap, central support, the interior space of peripheral support body form 9 and hold fine chamber 5, optical fiber is arranged in the fine chamber of appearance and the fine chamber of each appearance width radially can only hold 1 optical fiber, oversheath is positioned at outside peripheral support body, and reinforcing element is between peripheral support body and oversheath.
embodiment 2
Ask for an interview Fig. 3 and Fig. 4, a kind of optical cable of compact conformation, it includes 9 optical fiber 1, reinforcing element 6, oversheath 7, it is characterized in that it also includes central support 2, peripheral support body 4 and 9 connection straps 3 that central support is connected with peripheral support body, connection strap, the external space of central support, the interior space of peripheral support body forms 9 and holds fine chamber 5, optical fiber is arranged in the fine chamber of appearance and the fine chamber of each appearance width radially can only hold 1 optical fiber, oversheath is positioned at outside peripheral support body, reinforcing element is arranged in oversheath, and reinforcing element is 2, be distributed in symmetrically in oversheath.
embodiment 3
Ask for an interview Fig. 5 and Fig. 6, a kind of optical cable of compact conformation, it includes 9 optical fiber 1, reinforcing element 6, oversheath 7, it is characterized in that it also includes central support 2, peripheral support body 4 and 9 connection straps 3 that central support is connected with peripheral support body, connection strap, the external space of central support, the interior space of peripheral support body forms 9 and holds fine chamber 5, optical fiber is arranged in the fine chamber of appearance and the fine chamber of each appearance width radially can only hold 1 optical fiber, oversheath is positioned at outside peripheral support body, reinforcing element is arranged in oversheath, and reinforcing element is 4, be distributed in symmetrically in oversheath.
Certainly, the reinforcing element in embodiment 2,3 also can be other many, can be distributed in oversheath symmetrically or asymmetricly.
Further, the reinforcing element in embodiment 2,3 can also be that peripheral support body is close at edge, can make that the thickness of oversheath is less like this, optical cable entire outer diameter is thinner, cost is lower.
Further, the reinforcing element in embodiment 2,3 should be not less than 0.4mm from the minor increment at oversheath edge, can ensure that optical cable has more excellent performance in alternating bending and torsion like this.
embodiment 4
Ask for an interview Fig. 7 and Fig. 8, a kind of optical cable of compact conformation, it includes 12 optical fiber 1, reinforcing element 6, oversheath 7, it is characterized in that 12 connection straps 3 that it also includes central support 2, peripheral support body 4 and is connected with peripheral support body by central support, the external space of connection strap, central support, the interior space of peripheral support body form 12 and hold fine chamber 5, optical fiber is arranged in the fine chamber of appearance and the fine chamber of each appearance width radially can only hold 1 optical fiber, oversheath is positioned at outside peripheral support body, and reinforcing element is between peripheral support body and oversheath.
embodiment 5
Ask for an interview Fig. 9, and with reference to figure 7 and Fig. 8, a kind of optical cable of compact conformation, it includes 24 optical fiber 1, reinforcing element 6, oversheath 7, it is characterized in that it also includes central support 2, peripheral support body 4 and 12 connection straps 3 that central support is connected with peripheral support body, connection strap, the external space of central support, the interior space of peripheral support body forms 12 and holds fine chamber 5, optical fiber is arranged in the fine chamber of appearance and the fine chamber of each appearance width radially can only hold 2 optical fiber, oversheath is positioned at outside peripheral support body, reinforcing element is between peripheral support body and oversheath.
embodiment 6
Ask for an interview Figure 10 and Figure 11, a kind of optical cable of compact conformation, it includes 9 optical fiber 1, reinforcing element 6, oversheath 7, it is characterized in that 9 connection straps 3 that it also includes central support 2, peripheral support body 4 and is connected with peripheral support body by central support, the external space of connection strap, central support, the interior space of peripheral support body form 9 and hold fine chamber 5, optical fiber is arranged in the fine chamber of appearance and the fine chamber of each appearance width radially can only hold 1 optical fiber, oversheath is positioned at outside peripheral support body, and reinforcing element is between peripheral support body and oversheath; The top in the fine chamber of each appearance has a groove 8, on arbitrary xsect, each groove be fan-shaped and the axis in the excessively corresponding fine chamber of appearance, this fan-shaped summit.
The fine chamber of appearance in embodiment 1 to embodiment 6 is symmetrical in optical cable, can certainly asymmetric distribution.
embodiment 7
Ask for an interview Figure 12 and Figure 13, a kind of optical cable of compact conformation, it includes 4 optical fiber 1, 5 insulated conductors 9 for telecommunication, reinforcing element 6, oversheath 7, it is characterized in that it also includes central support 2, peripheral support body 4 and 5 connection straps 3 that central support is connected with peripheral support body, connection strap, the external space of central support, the interior space of peripheral support body forms 5 and holds fine chamber 5, optical fiber is arranged in the fine chamber of appearance and the fine chamber of the appearance of each placement optical fiber width radially can only hold 1 optical fiber, insulated conductor for telecommunication is arranged in the fine chamber of the appearance not identical with optical fiber, oversheath is positioned at outside peripheral support body, reinforcing element is between peripheral support body and oversheath, the top in the fine chamber of each appearance has a groove 8, on arbitrary xsect, each groove be fan-shaped and the axis in the excessively corresponding fine chamber of appearance, this fan-shaped summit, every root insulated conductor 9 is made up of conductor 91 and the insulation course 92 that envelopes conductor, the fine chamber of appearance of placing the insulated conductor being used for telecommunication is larger than the fine chamber of the appearance of placing optical fiber.
embodiment 8
Ask for an interview Figure 14 to Figure 16, a kind of optical cable of compact conformation, it includes 16 optical fiber 1, reinforcing element 6, oversheath 7, it is characterized in that it also includes central support 2, peripheral support body 4 and 4 connection straps 3 that central support is connected with peripheral support body, connection strap, the external space of central support, the interior space of peripheral support body forms 4 and holds fine chamber 5, optical fiber is arranged in the fine chamber of appearance and the fine chamber of the appearance of each placement optical fiber width radially can only hold 1 optical fiber, 4 optical fiber are placed with in the fine chamber of each appearance, oversheath is positioned at outside peripheral support body, reinforcing element is between peripheral support body and oversheath, inner edge radially, the described fine chamber of all appearances is circumferentially same, the fine chamber of all appearances outer rim is radially also circumferentially same, the radius of inner edge is R1, the radius of outer rim is R2, the diameter of simple optical fiber is D, R1, R2 and D meets: D < (R2-R1) < (2 × D).
In this embodiment, can also place multifiber in the fine chamber of each appearance, the quantity holding fine chamber is also not limited to 4, also can be that other are multiple; Further, hold in fine chamber and can also place fibre ribbon, in fibre ribbon, comprise multifiber, the phenomenon of such fibre ribbon cracking in CN101393310A can be overcome like this, make construction, welding more convenient.
The optical cable of a kind of compact conformation described in above-mentioned arbitrary embodiment, is characterized in that described reinforcing element is aramid yarn or glass fiber yarn or steel wire or copper bar or fiberglass-reinforced plastic lever.
The optical cable of a kind of compact conformation described in above-mentioned arbitrary embodiment, is characterized in that the top in the described fine chamber of each appearance can have a groove, on arbitrary xsect, each groove be fan-shaped and the axis in the excessively corresponding fine chamber of appearance, this fan-shaped summit.
The optical cable of a kind of compact conformation described in above-mentioned arbitrary embodiment, is characterized in that the described fine chamber of each appearance width radially can only hold 1 ~ 2 optical fiber.
Further, the optical cable of a kind of compact conformation described above, when the fine chamber of each appearance width radially can only hold 1 optical fiber, it is characterized in that inner edge radially, the described fine chamber of all appearances is circumferentially same, the fine chamber of all appearances outer rim is radially also circumferentially same, the radius of inner edge is R1, the radius of outer rim is R2, and the diameter of simple optical fiber is D, R1, R2 and D meets: D < (R2-R1) < (2 × D).
The optical cable of a kind of compact conformation described in above-mentioned arbitrary embodiment, is characterized in that described optical fiber is single-mode fiber or multimode optical fiber.
The optical cable of a kind of compact conformation described in above-mentioned arbitrary embodiment, be is characterized in that the fine chamber of described central support, peripheral support body, connection strap, appearance is integrally formed, and is formed by extrusion molding by plastic extrusion machine head; The material of described central support, peripheral support body, connection strap is all polybutylene terephthalate or polypropylene.
The optical cable of a kind of compact conformation described in above-mentioned arbitrary embodiment, is characterized in that the material of described oversheath is Low Density Polyethylene or medium density polyethylene or high density polyethylene or flame-proof polyethylene or Polyvinylchloride or low smoke and zero halogen tygon or low-smoke low-halogen tygon.
The optical cable of above-mentioned embodiment 1 to embodiment 6 and a kind of compact conformation described in embodiment 8, it can comprise other multifiber, other many connection straps, other fine chamber of multiple appearance.
The optical cable of a kind of compact conformation described in above-mentioned embodiment 7, it can comprise other multifiber, other many connection straps, other fine chamber of multiple appearance, other the many insulated conductors for telecommunication.
The optical cable of a kind of compact conformation described in above-mentioned arbitrary embodiment, reinforcing element can in oversheath or between peripheral support body and oversheath.
In the present invention, due to the existence of reinforcing element, make optical cable can bear larger pressure, namely anti-pressure ability is stronger, and meanwhile, reinforcing element can play buffer action to impact, and therefore, optical cable impact resistance is stronger.
In the present invention, due to the existence of oversheath, make optical cable can bear larger pressure, namely anti-pressure ability is stronger, and meanwhile, oversheath can play buffer action to impact, and therefore, optical cable impact resistance is stronger; Reinforcing element and oversheath make optical cable of the present invention have wider environmental adaptation scope relative to documents, try out through foreign customers, in the country of outside air temperature from-50 ~ 85 DEG C of natural trend, continuous use 1 year, do not produce the phenomenon of signal interruption, and optical cable of the prior art can only be suitable for the scope of-40 ~ 70 DEG C.
Compared with prior art, external diameter reduces by 25 ~ 43%, and therefore, cost also significantly reduces, and produces a desired effect in the present invention, and through the inspection of cable inspection center of the Ministry of Information industry, properties of optical fiber cable meets whole regulations of YD/T769-2010 completely.
Place the insulated conductor being used for telecommunication in the invention process example 7, being that the demand in order to meet foreign customers is carried out, its objective is transmission weak electric signal, mainly monitoring and telephone signal, do not need other light device interpreter.
In comprehensive cable of the present invention, the materials such as greasy for preventing water, water-proofing powder, water blocking yarn can also be filled in the fine chamber of appearance, make optical fiber corrode from moisture content or slow down moisture content erosion action.
The making of comprehensive cable of the present invention, does not need the stranded equipment of SZ, does not need fibre bundle wrapping equipment, and it is quite convenient therefore to make, and equipment investment is lower.
Therefore, comprehensive cable of the present invention has following main beneficial effect: more compact structure, physical dimension are less, cost is lower, compression resistance/impact/bending property is stronger.
The optical cable of a kind of compact conformation of the present invention, it adopts following methods to be made:
The first step: install secondary coated extruded mould step: the mould of formation central support, peripheral support body, connection strap is arranged on plastic extrusion machine head, and compound substance or polypropylene being placed in plastic extruder, to carry out fusing to be extruded, the fine pin of leading that the insulated conductor of optical fiber/be used for telecommunication is passed through is arranged on mould rear, and makes to lead fine pin and penetrate in the fine lumen pore of appearance corresponding to mould; Described compound substance comprises the raw material of filling a prescription by following weight portion: the commercially available toughner of commercially available optical cable polybutylene terephthalate 1 part, model to be AX8000 or model be BT108Z: polybutylene terephthalate weight 2.5 ~ 4.8%, model is the UV resistant agent of PBT1731: 1.0 ~ 2.5% of polybutylene terephthalate weight;
Second step: installing optical fibres/for the insulated conductor step of telecommunication: by optical fiber/be arranged on pay-off unit for the insulated conductor of telecommunication, and the insulated conductor of optical fiber/be used for telecommunication to be penetrated in the fine lumen pore of appearance described in the first step by the optical fiber in fine chamber of appearance each in optical cable/for the quantity of the insulated conductor of telecommunication, color and sequence requirement and through extrusion head;
3rd step: extrusion molding and distraction step: output extruding machine and compound substance or polypropylene are extruded from mould front, the insulated conductor of the optical fiber in second step/be used for telecommunication is drawn together into hot water storgae simultaneously, form central support, peripheral support body, connection strap and hold fine chamber, the interior space of the external space of connection strap, central support, peripheral support body is formed and holds fine chamber, and optical fiber/for the insulated conductor of telecommunication is arranged in and holds fine chamber and form extrusion molding body; The fine chamber of each appearance width radially can only hold 1 optical fiber, inner edge radially, the fine chamber of all appearances is circumferentially same, the fine chamber of all appearances outer rim is radially also circumferentially same, the radius of inner edge is R1, the radius of outer rim is R2, the diameter of simple optical fiber is D, R1, R2 and D meets: D < (R2-R1) < (2 × D); The traction of extrusion molding body is entered cold rinse bank cooling, then adopts online blowing drying device to make extrusion molding soma dry, then form cable core on dish tool;
4th step: reinforcing element and oversheath forming step: by the core rod of gained cable core in the 3rd step through sheath extruding machine, and place reinforcing element outward at cable core and carry out oversheath extrusion molding, be coated between peripheral support body and oversheath by reinforcing element is coated in oversheath or by reinforcing element, namely obtain the optoelectrical cable of compact conformation; The material of described oversheath is Low Density Polyethylene or medium density polyethylene or high density polyethylene or flame-proof polyethylene or Polyvinylchloride or low smoke and zero halogen tygon or low-smoke low-halogen tygon; Described reinforcing element is aramid yarn or glass fiber yarn or steel wire or copper bar or fiberglass-reinforced plastic lever.
Certainly, when the material of central support described above, peripheral support body, connection strap is compound substance, can to add model in commercially available polybutylene terephthalate be AX8000 or model be the commercially available toughner of BT108Z and model is the UV resistant agent of PBT1731, and the weight of toughner account for polybutylene terephthalate weight 2.5 ~ 4.8%, UV resistant agent accounts for 1.0 ~ 2.5% of polybutylene terephthalate weight; Through test, this kind of formula does not need the processing technology changing original polybutylene terephthalate, and greatly can increase central support, peripheral support body, the toughness of connection strap and anti-ultraviolet property, the cable core produced is placed on applicant location, shine under the daylight in August and within continuous 20 days, have no cable core cracking, and the cable core not adding above-mentioned UV resistant agent is placed on applicant location, shines under the daylight in August and just see to ftracture in cable core many places in continuous 5 days; The cable core that this kind of formula is produced, when bearing overload pressure 100%, clear-cutting forestland original state in 1 hour, and do not adopt the cable core that this fills a prescription, when bearing overload pressure 50%, restoring to the original state not yet in 48 hours, namely adopting the formula of prior art at overload pressure or after impacting, may cause the prolonged stoppage of optical fiber communication, and the meeting of the application recovers within a short period of time.
Certainly, above-mentioned formula can be applied in above-mentioned arbitrary embodiment completely; Certainly, the material of central support, peripheral support body, connection strap can be commercially available polybutylene terephthalate, preferred model be PBT3013,61008, PBT-280.
Method for making of the present invention simply, is easily grasped, and speed of production is fast, little power consumption, process costs are low.
The present invention is not limited to above-mentioned preferred forms, and should be appreciated that design of the present invention can be implemented to use by other various forms, they drop in protection scope of the present invention equally.