CN105729754B - A kind of discontinuity vitta extrusion device and expressing technique - Google Patents
A kind of discontinuity vitta extrusion device and expressing technique Download PDFInfo
- Publication number
- CN105729754B CN105729754B CN201610293393.9A CN201610293393A CN105729754B CN 105729754 B CN105729754 B CN 105729754B CN 201610293393 A CN201610293393 A CN 201610293393A CN 105729754 B CN105729754 B CN 105729754B
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- CN
- China
- Prior art keywords
- vitta
- die sleeve
- discontinuity
- core rod
- protective cover
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/154—Coating solid articles, i.e. non-hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/17—Articles comprising two or more components, e.g. co-extruded layers the components having different colours
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
- B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
-
- 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
- G02B6/4479—Manufacturing methods of optical cables
- G02B6/4482—Code or colour marking
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention proposes a kind of discontinuity vitta extrusion device and expressing technique, technical points are：It is provided with die sleeve in casing and steep-taper length holds the core rod in footpath, the crack of die sleeve and core rod is protective cover material runner, and protective cover material runner connects with protective cover material extruder；Vitta current divider is fixed with by gland on the outside of die sleeve, the vitta runner of vitta current divider connects for serpentine channel and with vitta material extruder.The present invention can be formed the restrictive coating with discontinuity vitta in cable surface, played the purpose for preferably distinguishing optical cable with regular length and interval extrusion vitta；Vitta runner cavity possesses quick pressure releasing function so that vitta extrusion can stop rapidly；Extrusion pressure between core rod and die sleeve is more than the pressure of vitta runner cavity, when vitta stops extruding, can block the generation for the phenomenon that because of the vitta material of inertia extrusion, avoids " trailing "；Mould is simple, only need to redesign vitta stream road and mold insert structure, processing cost is low.
Description
Technical field
The present invention relates to a kind of optical cable coating technology field, more particularly to a kind of discontinuity vitta extrusion device and extrusion work
Skill.
Background technology
With the development of optical communication technique, the demand of optical cable is increasing, more optical cable Tong Gou, with groove or with pipe lay
Situation it is more and more common.And in existing production technology, the oversheath of optical cable is generally black, therefore works as more optical cables one
During with laying, the problem of being not easy to recognize just occurs, installation to optical cable, continues and detection is made troubles.Asked to solve this
Topic, the way of currently the majority producer is to extrude one or more continuous vitta in cable surface, by the color of vitta and
Radical makes a distinction to optical cable.But this method is there is also some problems, expressing technique and cable outer diameter are primarily due to
Limitation, the radical of vitta can not be excessive, and the optical cable of different vitta quantity needs to use different vitta material current dividers, increase
Processing cost.Other vitta optical cable irradiates, vitta easily takes off after outdoor placement a period of time by the long-time of sunlight
Color, similar color such as yellow and white are easily obscured, and also can bring difficulty to identification.Therefore the conventional method for extruding vitta
The purpose that optical cable is distinguished can not be met, new solution is actively being sought in major optical cable production commercial city at present.
The content of the invention
The present invention in view of the shortcomings of the prior art, proposes a kind of discontinuity vitta extrusion device and expressing technique, can squeezed
Go out to carry the restrictive coating of discontinuity vitta, while avoid the occurrence of " hangover " phenomenon.
The technical proposal of the invention is realized in this way：
A kind of discontinuity vitta extrusion device, including casing, core rod, die sleeve, vitta current divider, vitta material extruder and shield
Jacking extruder, die sleeve is provided with the casing and steep-taper length holds the core rod in footpath, 56-70 ° of the outside cone angle of the core rod, holds footpath
Length is 30-40 ㎜, and the crack of die sleeve and core rod is protective cover material runner, and protective cover material runner connects with protective cover material extruder；In mould
Set outside is fixed with vitta current divider by gland, the vitta runner of vitta current divider for serpentine channel and with vitta material extruder
Connection.
Preferably, the vitta material extruder and protective cover material extruder are screw extruder.
Preferably, the interior cone angle of the die sleeve is 40-45 °.
A kind of expressing technique of discontinuity vitta extrusion device, it is comprised the technical steps that：（1）Optical cable is with constant speed from mould
Core passes through；
（2）According to vitta length and requirements of spacing distance calculating vitta finds time and dwell time, and sets vitta material
The extrusion program of extruder；
（3）Vitta material extruder and protective cover material extruder are fed respectively；
（4）Vitta material and protective cover material are coated on the outside of optical cable cools down final molding through water-carrying groove, and formation carries discontinuity color
The restrictive coating of bar.
Beneficial effects of the present invention are：1. it can be formed and carried in cable surface with regular length and interval extrusion vitta
The restrictive coating of discontinuity vitta, play the purpose for preferably distinguishing optical cable；
2. special vitta runner design, vitta runner cavity is set to possess quick pressure releasing function so that vitta extrusion can
It is rapid to stop；
3. certain moduli core designs, the extrusion pressure between core rod and die sleeve is set to be more than the pressure of vitta runner cavity, can
When vitta stops extruding, the generation for the phenomenon that because of the vitta material of inertia extrusion, avoids " trailing " is blocked, only in vitta afterbody shape
It is raised into slight ellipse；
4. mould is simple, vitta stream road and mold insert structure only need to be redesigned, processing cost is low.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the core rod and die sleeve partial enlargement structural representation of the present invention；
Fig. 3 is core rod in the prior art and die sleeve partial enlargement structural representation；
Fig. 4（a）For the vitta diversion structure schematic diagram of the present invention;
Fig. 4（b）For Fig. 4（a）Left view；
Fig. 4（c）For Fig. 4（a）Along the expansion view in A-A faces；
Fig. 5（a）For the vitta diversion structure schematic diagram of prior art;
Fig. 5（b）For Fig. 5（a）Left view；
Fig. 5（c）For Fig. 5（a）The expansion view along B-B faces.
In figure：1st, core rod；2nd, protective cover material runner；3rd, die sleeve；4th, vitta current divider；5th, vitta material screw extruder；6th, machine
Shell；7th, protective cover material screw extruder；8th, gland.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, rather than whole embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other under the premise of creative work is not made
Embodiment, belong to the scope of protection of the invention.
As shown in Fig. 1,2,4, a kind of discontinuity vitta extrusion device of the embodiment of the present invention, including casing 6, core rod 1, mould
3, vitta current divider 4, vitta material screw extruder 5 and protective cover material screw extruder 7 are covered, the He of die sleeve 3 is provided with the casing 6
Steep-taper, which is grown, holds the core rod 1 in footpath, and 60 ° of the outside cone angle of the core rod 1, to hold electrical path length be 35.46 ㎜, and the crack of die sleeve 3 and core rod 1 is
Protective cover material runner 2, protective cover material runner 2 connect with protective cover material screw extruder 7；Vitta is fixed with by gland 8 in the outside of die sleeve 3
Current divider 4, the vitta runner of vitta current divider 4 connect for serpentine channel and with vitta material extruder 5.The interior cone angle of the die sleeve
For 44 °.
A kind of expressing technique of discontinuity vitta extrusion device, it is comprised the technical steps that：
（1）Optical cable is passed through with 60m/min constant speed from core rod；
（2）Vitta length 1m, spacing distance 0.2m, then every 1.2 seconds of vitta extruder extrusion once, wherein persistently squeezing
Go out the time for 1 second, dwell time is 0.2 second, and sets the extrusion program of vitta material extruder；
（3）Vitta material extruder and protective cover material extruder are fed respectively；
（4）Because the vitta runner of vitta current divider is serpentine channel, compared with before-improvement（Fig. 5 shows）Add vitta runner
Length, the distance increase for making vitta material be flowed in vitta runner, accelerates cavity pressure release speed and reduces runner chamber pressure, pass through
Test is crossed, the chamber pressure of vitta runner is about 5MPa after improvement;Core rod outside cone angle is by 38 °（Fig. 3 shows）Increase to 60 °（Fig. 2
Show）, core rod holds electrical path length increases to 35.46mm by 10mm, increases the space between core rod and die sleeve, so as to increase core rod with
Extrusion pressure between die sleeve.After tested, the extrusion pressure before improvement between core rod and die sleeve is about 7.5MPa, energy after improvement
Enough reach 15.2MPa, much larger than vitta runner chamber pressure.And then it can be blocked when vitta stops extruding because inertia is extruded
Vitta material, the generation for the phenomenon that avoids " trailing ", it is raised only to form slight ellipse in vitta afterbody；Vitta material and protective cover material bag
Overlay on the outside of optical cable and cool down final molding through water-carrying groove, form the restrictive coating with discontinuity vitta.
These are only presently preferred embodiments of the present invention, be not intended to limit the invention, it is all the present invention spirit and
Within principle, any modification, equivalent substitution and improvements made etc., it should be included in the scope of the protection.
Claims (4)
1. a kind of discontinuity vitta extrusion device, including casing, core rod, die sleeve, vitta current divider, vitta material extruder and sheath
Expect extruder, it is characterised in that：Die sleeve is provided with the casing and steep-taper length holds the core rod in footpath, the outside cone angle of the core rod
56-70 °, to hold electrical path length be 30-40 ㎜, the crack of die sleeve and core rod is protective cover material runner, and protective cover material runner is extruded with protective cover material
Machine connects；Vitta current divider is fixed with by gland on the outside of die sleeve, the vitta runner of vitta current divider for serpentine channel and with
Vitta material extruder connects.
2. discontinuity vitta extrusion device according to claim 1, it is characterised in that：The vitta material extruder and sheath
Expect that extruder is screw extruder.
3. discontinuity vitta extrusion device according to claim 1, it is characterised in that：The interior cone angle of the die sleeve is 40-
45°。
4. the expressing technique of discontinuity vitta extrusion device according to claim 1, it is characterised in that：It includes following work
Skill step：（1）Optical cable is passed through with constant speed from core rod；
（2）According to vitta length and requirements of spacing distance calculating vitta finds time and dwell time, and sets vitta material extrusion
The extrusion program of machine；
（3）Vitta material extruder and protective cover material extruder are fed respectively；
（4）Vitta material and protective cover material are coated on the outside of optical cable and cool down final molding through water-carrying groove, are formed with discontinuity vitta
Restrictive coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293393.9A CN105729754B (en) | 2016-05-05 | 2016-05-05 | A kind of discontinuity vitta extrusion device and expressing technique |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610293393.9A CN105729754B (en) | 2016-05-05 | 2016-05-05 | A kind of discontinuity vitta extrusion device and expressing technique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105729754A CN105729754A (en) | 2016-07-06 |
| CN105729754B true CN105729754B (en) | 2017-12-12 |
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| CN201610293393.9A Active CN105729754B (en) | 2016-05-05 | 2016-05-05 | A kind of discontinuity vitta extrusion device and expressing technique |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106772860B (en) * | 2016-12-30 | 2023-11-24 | 通鼎互联信息股份有限公司 | Extrusion die sleeve for three-color strips of 8-shaped optical cable |
| CN110888214B (en) * | 2019-12-10 | 2023-09-08 | 山东飞扬特种线缆有限公司 | Die for manufacturing optical cable or cable with novel structure and manufacturing method |
| US11846822B2 (en) | 2021-12-29 | 2023-12-19 | Sterlite Technologies Limited | Optical fiber cable with compressed core and manufacturing method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2613981B1 (en) * | 1987-04-15 | 1989-10-13 | Swisscab E A Schoen Sa | METHOD AND HEAD FOR EXTRUDING PROFILES IN SYNTHETIC MATERIAL HAVING COLORED STRIPS |
| CN201464684U (en) * | 2009-06-02 | 2010-05-12 | 唐良华 | Color skin and color strip shunt device of optical cable |
| CN102205616A (en) * | 2011-04-18 | 2011-10-05 | 烽火通信科技股份有限公司 | Optical cable colour bar injection moulding die sleeve |
| CN204936144U (en) * | 2015-09-17 | 2016-01-06 | 湖北凯乐科技股份有限公司 | A kind of mould producing vitta Loose tube |
| CN206085607U (en) * | 2016-05-05 | 2017-04-12 | 沈阳亨通光通信有限公司 | Discontinuity vitta extrusion device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6476622A (en) * | 1987-09-16 | 1989-03-22 | Hitachi Cable | Manufacture of cable |
-
2016
- 2016-05-05 CN CN201610293393.9A patent/CN105729754B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2613981B1 (en) * | 1987-04-15 | 1989-10-13 | Swisscab E A Schoen Sa | METHOD AND HEAD FOR EXTRUDING PROFILES IN SYNTHETIC MATERIAL HAVING COLORED STRIPS |
| CN201464684U (en) * | 2009-06-02 | 2010-05-12 | 唐良华 | Color skin and color strip shunt device of optical cable |
| CN102205616A (en) * | 2011-04-18 | 2011-10-05 | 烽火通信科技股份有限公司 | Optical cable colour bar injection moulding die sleeve |
| CN204936144U (en) * | 2015-09-17 | 2016-01-06 | 湖北凯乐科技股份有限公司 | A kind of mould producing vitta Loose tube |
| CN206085607U (en) * | 2016-05-05 | 2017-04-12 | 沈阳亨通光通信有限公司 | Discontinuity vitta extrusion device |
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| CN105729754A (en) | 2016-07-06 |
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| TR01 | Transfer of patent right |
Effective date of registration: 20191127 Address after: Shenyang City, Liaoning province 110168 science road Hunnan New District No. 6 Co-patentee after: Jiangsu Hengtong Photoelectric Co., Ltd. Patentee after: Shenyang Hengtong Optical Communication Co., Ltd. Address before: Shenyang City, Liaoning province 110000 science road Hunnan New District No. 6 Patentee before: Shenyang Hengtong Optical Communication Co., Ltd. |
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| TR01 | Transfer of patent right |