CN201525119U - Optical fiber cable forming die - Google Patents
Optical fiber cable forming die Download PDFInfo
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- CN201525119U CN201525119U CN2009203116771U CN200920311677U CN201525119U CN 201525119 U CN201525119 U CN 201525119U CN 2009203116771 U CN2009203116771 U CN 2009203116771U CN 200920311677 U CN200920311677 U CN 200920311677U CN 201525119 U CN201525119 U CN 201525119U
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Abstract
The utility model relates to an optical fiber cable forming die comprising a die sleeve and a die core, wherein the axial taper hole in the center of the die core is internally provided with a die core insert in an inserting manner; the die core insert is internally and axially provided with at least one optical fiber channel and at least one reinforcement part channel; each optical fiber channel is internally and fixedly provided with an optical fiber guiding protective pipe; the die sleeve is internally provided with the taper hole; the front end part of the die core is conical, the front end part of the die core is matched with the taper hole of the die sleeve to form a conical runner, and the reinforcement part channel is communicated with the conical runner; and the front end of the die core insert is positioned in the die core, each optical fiber guiding protective pipe penetrates through two ends of the die core insert, and the front end of each optical fiber guiding protective pipe extends forwarding between the inner port and the outer port of the extrusion hole of the die sleeve. The optical fiber cable forming die can realize the cable processing by utilizing bare optical fiber; and during the cable forming process, the melted plastics can tightly wrap the reinforcement part and simultaneously can not damage the bare optical fiber, so that the quality of the processed cable is ensured.
Description
Technical field
The utility model relates to a kind of optical fiber cabling die.
Background technology
At present, producing the mould that optical cable uses generally has plsitive mold and tubular molding tool, plsitive mold as shown in Figure 1, core rod 2 separates with suitable gap with die sleeve 1, molten plastic flows through the tapered runner of both formation, contacts with cable core before depanning; Because its tapered runner mesohigh smelt flow is to the right and wrong level, formed very big pressure in the direction of vertical cable core, this pressure can wrap up cable core very tight.Tubular molding tool as shown in Figure 2, core rod 4 front ends have the sleeve pipe of fixed length to hold footpath 5, hold the endoporus that die sleeve 3 is inserted at the position, footpath, and and the front end of die sleeve 3 flush; Cable core holds depanning in the footpath from the sleeve pipe of this core rod, and molten plastic is from the annular channel depanning between core rod and the die sleeve, at this moment the moving direction of the plastic melt logistics of HTHP is the same with the direction that cable core advances, so very soft being coated on the cable core of molten plastic after the depanning.In the process of producing optical cable, can select certain type mould according to different needs, for the cable core of fragility, need reduce the cable core applied pressure, also to leave the suitable excess room of cable core for, at this moment can use tubular molding tool; And,, reinforcement is wrapped up consolidation so wish plastics because mechanical strengths such as the elasticity of reinforcement, toughness are all very big for the optical cable that has reinforcement, at this moment just need to use plsitive mold.
Along with the development of optic communication industry, especially the demand of inside cable heightens, small size, little quality, the shaping-orientation that becomes cable configuration attractive in appearance and easy to use.Occurred a kind of size optical cable little, simple in structure on the market, the optical fiber that this optical cable uses is the colored optical fiber of external diameter as 0.25mm, and the outside dimension of the reinforcement of use is 0.4mm～0.5mm.Though this cable configuration is simple, the cable core size is little, and what directly use is bare fibre (generally will pass through secondary coating technology), so need to prevent that optical fiber is stressed in the stranding process; Moreover the reinforcement of this optical cable inside is steel wire or hard crisp glass fibre, makes every effort to coat consolidation during stranding again; In addition, in the stranding process, though reinforcement bears certain laying tension, slightly trembling unavoidably can appear in reinforcement, because reinforcement has very big interaction force when contacting with molten plastic, slightly the trembling of reinforcement can cause the die orifice discharging unstable and cause the cable outer diameter instability.For these reasons, when producing this optical cable, to protect, promptly must hold the footpath and overlap tube transitions, to separate the vertical pressure that molten plastic produces optical fiber optical fiber; And reinforcement is needed to pack tightly by the vertical pressure that molten plastic produces.Satisfy two kinds of opposite requirements simultaneously, obvious existing squash type and tubular molding tool all do not reach, and need a kind of new stranding mould of redesign; In addition, during designing mould because size is too little, the not enough 1mm of wire hole on the core rod, and the not enough 0.5mm of fiber size, do not observe the relative position of wire hole, do not have with sensation yet be from situation under, it is very difficult to wear fibre.
Chinese patent 200520099222.X discloses a kind of little 8 font self-bearing type beam tube optical cable moulds, this mould comprises die cap and core rod cover, the core rod plug-in unit of suit taper in the axial taper hole of core rod cover, the cylindrical section of core rod plug-in unit front end stretches in the endoporus of die cap, and forms the ring-type extrusion channel between the die cap inner hole wall; Be drilled with axial reinforcement through hole and cover pipe through-hole on the core rod plug-in unit, and set up separately in bilateral symmetry and to vacuumize the hole, offer the fabrication hole that diameter contains aforementioned four holes at the rear portion of core rod plug-in unit, wherein, correspondence is inserted with reinforcement steel pipe and sleeve pipe steel pipe in the short splice hole of reinforcement through hole and sleeve pipe through hole back-end, and two steel pipes need be fixed by the steel pipe fixing frame that is installed in core rod plug-in unit rear end.This mould is the tubular molding tool that the optical fiber with loose sleeve pipe is carried out stranding; by vacuumizing; the molten plastic that flows out from annular channel packs tightly optical fiber and reinforcement simultaneously; because the protective effect of loose sleeve pipe; molten plastic can not cause any damage to the optical fiber in the loose sleeve pipe; but; this mould then is inappropriate for utilizing diameter only to have the bare fibre of 0.25mm to produce optical cable; in the stranding process; molten plastic can push bare fibre under the effect of negative pressure; thereby the damage bare fibre, so that influence the quality and the performance of finished cable.In addition, above-mentioned core rod plug-in unit is an overall structure, if the through hole of core rod plug-in unit front end will be difficult to cleaning after blocked, the core rod plug-in unit sometimes even can scrap because of obstruction or serious wear integral body causes mould operation and maintenance cost higher.
The utility model content
The purpose of this utility model provides and a kind ofly utilizes bare fibre processing optical cable, is equipped with the optical fiber cabling die of reinforcement simultaneously, so that solve the technical problem that existing stranding mould can not directly utilize bare fibre to process to be furnished with the reinforcement optical cable.
For achieving the above object, the utility model adopts following technical scheme: a kind of optical fiber cabling die, comprise die sleeve and core rod, be fitted with the core rod plug-in unit in the axial taper hole at core rod center, be axially arranged with at least one optical-fibre channel and at least one reinforcement passage in the core rod plug-in unit, be fixed with optical fiber guiding pillar in each optical-fibre channel, has bellmouth in the die sleeve, the leading section of described core rod is tapered, the leading section of core rod cooperates the formation tapered runner with the bellmouth of die sleeve, each reinforcement passage is communicated with tapered runner; The front end of described core rod plug-in unit is positioned at core rod, and each optical fiber guiding pillar all runs through the two ends of core rod plug-in unit, and the front end of each optical fiber guiding pillar all projects forwardly between the inner port and external port of extrusion cavities of die sleeve.
Described core rod plug-in unit is a cylinder that is made of with the cylindrical section that is located in conical surface Duan Daduan conical surface section and one, the diameter of described cylindrical section is less than the diameter of conical surface Duan Daduan, core rod plug-in unit cylinder is by forming along the two clamping plate make-ups of cylinder axis to symmetrical subdivision, and described each passage is combined by the semicircle groove that symmetry is divided on the two clamping plate buckling surfaces; The conical surface section of core rod plug-in unit is coincide with the axial taper hole of core rod and is cooperated, tail end at the axial taper hole of core rod is provided with threaded connection hole, one gap is sleeved on retaining tight sleeve on the core rod plug-in unit cylindrical section and screws with the threaded connection hole of core rod and cooperate the front end pushing tow conical section of retaining tight sleeve and the shoulder of cylindrical section joining place.
Be fixed with reinforcement guiding pillar at least one reinforcement passage of core rod plug-in unit, reinforcement guiding pillar runs through the two ends of core rod plug-in unit, and the front end of reinforcement guiding pillar is positioned at core rod.
The front end head of described core rod is a removable head.
The centre of described die sleeve leading section is the body of a detachable setting-in, and the trepanning of this body is an extrusion cavities.
Optical fiber cabling die provided by the utility model, because the front end of optical fiber guiding pillar projects forwardly between the inner port and external port of die sleeve extrusion cavities, like this, when producing optical cable, optical fiber guiding pillar just separated from the non-horizontal flow of tapered runner to the HTHP molten plastic, this molten plastic just contains optical fiber when flowing into the extrusion cavities of die sleeve, at this moment to have become the direction of advancing with optical fiber consistent for its flow direction, what molten plastic was very soft is coated on the optical fiber, guaranteed that optical fiber does not bear very big lateral stress, avoided the impaired or fracture of optical fiber; Reinforcement after going out core rod then immediately by non-horizontal flow to molten plastic coat, under the effect of the bigger pressure at right angle of molten plastic, reinforcement can be coated tightly.The utility model has satisfied the specification requirement when utilizing the bare fibre stranding well, to the soft coating of bare fibre, the reinforcement consolidation is coated, and has guaranteed carrying out smoothly of stranding quality and production.
The column structure that core rod plug-in unit of the present utility model adopts the cylindrical section of conical surface section and one to constitute utilizes conical surface section and core rod taper fit, the assembly precision height; After mould is installed on the extruding machine, flow divider for nose is stretched out in the rear end of core rod plug-in unit, owing to be provided with optical-fibre channel and reinforcement passage in the core rod plug-in unit, be equivalent to the optical fiber of core rod and the perforation of reinforcement have been introduced the external environment condition that human eye can be observed, be convenient to accurate threading and guiding, simultaneously, because the lengthening of optical fiber and reinforcement passage, limited optical fiber and reinforcement trembling in traveling process, guaranteed that well outlet steadily and the stablizing of cable outer diameter; In addition, the core rod plug-in unit adopts the clamping plate type structure, utilize axial taper hole and retaining tight sleeve locking plate in the core rod, prevented that the core rod plug-in unit from getting loose, clamped optical fiber guiding pillar and reinforcement guiding pillar simultaneously, simple in structure, be convenient to processing and assembling, can also change easily during the wearing and tearing of guiding pillar, need not integral body scrap, save cost.Utilize mould of the present utility model can also produce dissimilar optical cables, at this moment only need to be equipped with to get final product with the corresponding core rod plug-in unit of optical cable, very flexible.
In the utility model, core rod adopts dismountable front end head, is blocked or impaired influence when using at the core rod head, can pull down cleaning easily or change a head again, needn't integral body scrap core rod, has saved the maintenance and the use cost of mould.In like manner, the die sleeve leading section adopts the cover body structure of detachable setting-in, is made as easily stifled extrusion cavities position easy to wear on the die sleeve independently that the body setting-in gets on, and has made things convenient for maintenance, has reduced maintenance cost.
Description of drawings
Fig. 1 is a structural representation of the present utility model;
Fig. 2 is the A-A schematic cross-section of core rod plug-in unit among Fig. 1.
The specific embodiment
Fig. 1, optical fiber cabling die shown in Figure 2 comprise die sleeve and core rod, and the leading section of core rod is tapered, and the leading section of core rod cooperates with the die sleeve that has bellmouth and forms tapered runner 11.Described die sleeve 2 is made of the body 9 that die sleeve main body and concentric are inlaid in the die sleeve body front end central through hole, the column trepanning of body 9 is the extrusion cavities 10 of die sleeve, after so easily stifled position easy to wear on the die sleeve being made as independently demountable structure, be convenient to safeguard, reduced maintenance cost.
Above-mentioned core rod 3 is made of core rod head 8 and mold core body, and mold core body is integral by being threaded with core rod head 8, thereby makes core rod constitute dismountable minute attachment structure.The center of core rod 3 has axial taper hole, and axially the front end of taper hole runs through the front end face of core rod, and axially the tail end of taper hole is provided with the threaded connection hole that runs through the core rod tail end, is fitted with core rod plug-in unit 5 in the axial taper hole of core rod, and the front end of core rod plug-in unit 5 is positioned at core rod.Be axially arranged with optical-fibre channel and reinforcement passage in the core rod plug-in unit 5; each reinforcement passage is communicated with tapered runner 11; be provided with optical fiber guiding pillar 6 in the optical-fibre channel; be provided with reinforcement guiding pillar 7 in the reinforcement passage; two kinds of guiding pillars all run through the two ends of core rod plug-in unit; wherein; the front end of optical fiber guiding pillar 6 extends to the inner port of the extrusion cavities of die sleeve forward; certainly; extend in the extrusion cavities 10 that inserts die sleeve and also can; separate as long as project forwardly to optical fiber in the pillar that all optical fiber can be led between the inner port of die sleeve extrusion cavities 10 and the external port and the molten plastic that does not change flow direction in the tapered runner, realize the purpose of protection optical fiber.The front end of reinforcement guiding pillar then is positioned at core rod, promptly be positioned at mold core body or project forwardly to the core rod head and all can, present embodiment is to adopt the mode concordant with the front end face of mold core body, but no matter which kind of mode is communicated with and does not expose core rod head front end as long as guarantee reinforcement guiding pillar 7 with tapered runner.Above-mentioned two kinds of guiding pillars all adopt the seamless steel pipe of respective diameters to make.
In the specific implementation, the optical-fibre channel in the core rod plug-in unit 5 and quantity and which passage of reinforcement passage can directly use (guiding of promptly not packing into pillar), which passage guiding pillar of need packing into, all should select flexibly according to the internal structure that will produce optical cable and the optical fiber that is adopted and the actual conditions of reinforcement.
Above-mentioned core rod plug-in unit 5 is the column structures that are made of with the cylindrical section that is located in conical surface Duan Daduan the conical surface section that cooperates with the axial taper hole of core rod and one, and the diameter of cylindrical section is less than the diameter of conical surface Duan Daduan, thereby forms shoulder at both joining place; The gap is set with the retaining tight sleeve 4 that has screw thread on the outer surface on the cylindrical section of core rod plug-in unit, the spiral fitted shaft of core rod plug-in unit 5 by retaining tight sleeve 4 and core rod threaded connection hole is in being positioned core rod 3, hand-held the screwing on the outer surface 12 partly of exposing core rod 3 tail ends of retaining tight sleeve 4 also is provided with annular knurl, to increase frictional force, be convenient to screw.Because the draw ratio of core rod plug-in unit 5 integral body is very big, can't process its inner optical-fibre channel and reinforcement passage with drill bit, so adding man-hour opens along the axial plane symmetry subdivision of this core rod plug-in unit earlier, but form two clamping plate of make-up, again each clamping plate to buckle side on process semicircle groove respectively, in fact, core rod plug-in unit 5 is the clamping plate type structures that formed by this two clamping plate make-up, each passage on the core rod plug-in unit is also combined by the semicircle groove that fastens on each clamping plate of back, sees shown in Figure 2.
When utilizing the utility model to produce optical cable, core rod 3 and die sleeve 2 all are assemblied in the flow divider for nose 1, core rod 3 is fixed, die sleeve 2 can move forward and backward the width of regulating the tapered runner 11 that molten plastic flows through in flow divider for nose 1, flow divider for nose 1 is the part of extruder head assembling mould.When core rod plug-in unit 5 is installed, pillar 6 and the reinforcement guiding that earlier optical fiber led pillar 7 correspondences are put in the middle of two clamping plate, integral body after will fastening is then inserted in the axial taper hole of core rod 3, core rod plug-in unit 5 assembles in the mode of taper fit with core rod 3, again retaining tight sleeve 4 is sleeved on the cylindrical section of core rod plug-in unit, and in the threaded connection hole with retaining tight sleeve 4 screw-in core rod tail ends, precession along with retaining tight sleeve 4, the shoulder of cylindrical section and conical surface section joining place on the front end pushing tow core rod plug-in unit 5 of retaining tight sleeve, make two clamping plate of the axial taper hole locking core rod plug-in unit in the core rod, two clamping plate clamp the pillar that respectively leads simultaneously, and the core rod plug-in unit and the pillar that respectively leads are imposed axially and locking radially.In the optical cable production process, optical fiber is sent to forward from optical fiber guiding pillar, reinforcement from the neutralization of reinforcement guiding pillar or the reinforcement passage (reinforcement that has does not need the pillar that leads, can directly penetrate in the reinforcement lead channels) send to forward, enter from the molten plastic of tapered runner 11 promptly to flow to behind the extrusion cavities 10 of die sleeve 4 and become horizontal flow to from extrusion cavities 10, extruding by original inclination, reinforcement converges with molten plastic at the cone top part (position before the extrusion cavities of die sleeve) of tapered runner, optical fiber converges with molten plastic in extrusion cavities, optical fiber, after converging, reinforcement and molten plastic from extrusion cavities, extrude the formation optical cable together.
Claims (6)
1. optical fiber cabling die, comprise die sleeve (2) and core rod (3), be fitted with core rod plug-in unit (5) in the axial taper hole at core rod center, be axially arranged with at least one optical-fibre channel and at least one reinforcement passage in the core rod plug-in unit, be fixed with optical fiber guiding pillar (6) in each optical-fibre channel, die sleeve has bellmouth in (2), it is characterized in that: the leading section of described core rod (3) is tapered, the leading section of core rod (3) cooperates formation tapered runner (11) with the bellmouth of die sleeve (2), each reinforcement passage is communicated with tapered runner (11); The front end of described core rod plug-in unit (5) is positioned at core rod (3), and each optical fiber guiding pillar (6) all runs through the two ends of core rod plug-in unit (5), and the front end of each optical fiber guiding pillar (6) all projects forwardly between the inner port and external port of extrusion cavities (10) of die sleeve.
2. optical fiber cabling die according to claim 1, it is characterized in that: described core rod plug-in unit (5) is a cylinder that is made of with the cylindrical section that is located in conical surface Duan Daduan conical surface section and one, the diameter of described cylindrical section is less than the diameter of conical surface Duan Daduan, core rod plug-in unit cylinder is by forming along the two clamping plate make-ups of cylinder axis to symmetrical subdivision, and described each passage is combined by the semicircle groove that symmetry is divided on the two clamping plate buckling surfaces; The conical surface section of core rod plug-in unit is coincide with the axial taper hole of core rod and is cooperated, tail end at the axial taper hole of core rod is provided with threaded connection hole, one gap is sleeved on retaining tight sleeve (4) on core rod plug-in unit (5) cylindrical section and screws with the threaded connection hole of core rod and cooperate the front end pushing tow conical section of retaining tight sleeve (4) and the shoulder of cylindrical section joining place.
3. optical fiber cabling die according to claim 2, it is characterized in that: be fixed with reinforcement guiding pillar (7) at least one reinforcement passage of core rod plug-in unit (5), reinforcement guiding pillar runs through the two ends of core rod plug-in unit (5), and the front end of reinforcement guiding pillar is positioned at core rod.
4. according to claim 1 or 2 or 3 described optical fiber cabling dies, it is characterized in that: the front end head (8) of described core rod is a removable head.
5. according to claim 1 or 2 or 3 described optical fiber cabling dies, it is characterized in that: the centre of described die sleeve leading section is the body (9) of a detachable setting-in, and the trepanning of this body is extrusion cavities (10).
6. optical fiber cabling die according to claim 5 is characterized in that: the front end head (8) of described core rod is a removable head.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203116771U CN201525119U (en) | 2009-09-28 | 2009-09-28 | Optical fiber cable forming die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203116771U CN201525119U (en) | 2009-09-28 | 2009-09-28 | Optical fiber cable forming die |
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| Publication Number | Publication Date |
|---|---|
| CN201525119U true CN201525119U (en) | 2010-07-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203116771U Expired - Lifetime CN201525119U (en) | 2009-09-28 | 2009-09-28 | Optical fiber cable forming die |
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| CN (1) | CN201525119U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496141A (en) * | 2013-09-27 | 2014-01-08 | 江苏亨通光电股份有限公司 | Special-shaped self-supporting optical cable mould and manufacturing method thereof |
| CN106493927A (en) * | 2016-12-04 | 2017-03-15 | 重庆永富电线电缆有限公司 | Heart yearn clad structure for electric wire |
| CN111640537A (en) * | 2020-06-05 | 2020-09-08 | 浙江万马集团特种电子电缆有限公司 | Pipeline-through coaxial cable and preparation method thereof |
| CN114953340A (en) * | 2022-05-17 | 2022-08-30 | 浙江东通光网物联科技有限公司 | Process for improving attenuation of butterfly-shaped optical cable and tooling die thereof |
-
2009
- 2009-09-28 CN CN2009203116771U patent/CN201525119U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103496141A (en) * | 2013-09-27 | 2014-01-08 | 江苏亨通光电股份有限公司 | Special-shaped self-supporting optical cable mould and manufacturing method thereof |
| CN106493927A (en) * | 2016-12-04 | 2017-03-15 | 重庆永富电线电缆有限公司 | Heart yearn clad structure for electric wire |
| CN111640537A (en) * | 2020-06-05 | 2020-09-08 | 浙江万马集团特种电子电缆有限公司 | Pipeline-through coaxial cable and preparation method thereof |
| CN114953340A (en) * | 2022-05-17 | 2022-08-30 | 浙江东通光网物联科技有限公司 | Process for improving attenuation of butterfly-shaped optical cable and tooling die thereof |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100714 Effective date of abandoning: 20090928 |