CN103600482A - Pipe extrusion-type mold and method for preparing special-shaped conductor cable by pipe extrusion-type mold - Google Patents
Pipe extrusion-type mold and method for preparing special-shaped conductor cable by pipe extrusion-type mold Download PDFInfo
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- CN103600482A CN103600482A CN201310624830.7A CN201310624830A CN103600482A CN 103600482 A CN103600482 A CN 103600482A CN 201310624830 A CN201310624830 A CN 201310624830A CN 103600482 A CN103600482 A CN 103600482A
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- conductor
- special
- shaped
- core rod
- die sleeve
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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
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/30—Extrusion nozzles or dies
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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
- B29C48/25—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B13/00—Apparatus or processes specially adapted for manufacturing conductors or cables
- H01B13/06—Insulating conductors or cables
- H01B13/14—Insulating conductors or cables by extrusion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/0009—Details relating to the conductive cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
- H01B7/00—Insulated conductors or cables characterised by their form
- H01B7/02—Disposition of insulation
- H01B7/0275—Disposition of insulation comprising one or more extruded layers of insulation
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Manufacturing Of Electric Cables (AREA)
Abstract
The invention discloses a pipe extrusion-type mold for extrusion of a plastic insulated cable and a method for preparing a special-shaped conductor cable by the pipe extrusion-type mold. Through the pipe extrusion-type mold, five types of special-shaped conductor insulated cable cores are processed to form the round special-shaped conductor cable so that unwrapping of the cable cores in compound stranding extrusion is avoided and the problem that the molded conductor cable fed to a take-up reel is easily unwrapped, so that a cable quality cost is reduced.
Description
Technical field
The present invention relates to electric wire manufacturing technology field, particularly relate to a kind of five class special-shaped conductor plastic insulated cables and extrude the tubular molding tool technical field of use.
Background technology
After five class special-shaped conductor insulating wire core strandings, just in time form circular, can greatly reduce the stranding packing material of cable core, reduced laying up diameter simultaneously, the material usage of later process also can be reduced, thereby reduce the manufacturing cost of cable, meet high-quality, requirement cheaply that modern market proposes cable product.But five class special-shaped conductors are in pressing process, press coefficient little, be only 10～20%.And the monofilament of five class conductors easily breaks or breaks in pressing process, strand twists the loose colored phenomenon in extrusion process again, affects conductor resistance.And after conductor die mould,, to the fugitive type of take-up reel, this solves this problem with regard to the suitable mould of needs.
Mould is the device of product approval, that plastics, rubber are extruded last hot pressing function device in overall process, its geometry, version and size, temperature height, pressure size etc. directly determine the success or failure of cable processing, and therefore design, apolegamy and the Insulation thereof of any extrusion molding material, rubber product mold are all paid much attention to.When extruding the insulating barrier of electric wire and restrictive coating with plastics, rubber extruder, mould is to control the key that plastics, rubber extrude layer thickness.
General extrusion die can be divided into by extrusion way: squash type, crowded tubular type, half are squeezed three kinds of pipe (extruding) formulas.Plsitive mold: there is certain distance core rod and die sleeve sizing area inner side, utilizes pressure to realize the last sizing of product, and plastics, rubber, by extruding, are directly extruded on core or cable core, extrude closely solid, surfacing is smooth.But it is easily eccentric, and service life is not long, joins mould and has relatively high expectations, and extrudes core bending property bad.Be suitable for extruding of small dimension core; Extrude require closely, appearance requires rounding, core uniformly; And the smaller person of plastic tensile etc.
Tubular molding tool: core rod has " proboscis ", generally maintains an equal level core rod mouth and die sleeve mouth during cooperation, so just forms tubular molding tool.It is the tensility of utilizing plastics, compares with plsitive mold, has high efficiency, easy tuningout, the good bending property of extruding core, long service life, joins the advantages such as mould interchangeability is strong, but extruding compactness, extruding the aspects such as quality not as plsitive mold.
Half tubular molding tool: claim again half plsitive mold, core rod has " short mouth ", general core rod mould mouth is at 1/2 place of die sleeve sizing area.Half tubular molding tool is substantially identical with tubular molding tool, it is short that just mould mouth Length Ratio squeezes tubular type, die sleeve sizing area length is also slightly short than crowded tubular type, it has drawn the advantage of crowded tubular type and squash type, improved the shortcoming of two kinds of mode moulds above, applicability is wider, but when core flexibility is poor or core is crooked, should not adopt this type of mould to extrude.
Five class special-shaped conductors are that individual layer is extruded when the insulation extrusion of plastic cable, generally can directly adopt tubular molding tool.
Summary of the invention
The main technical problem to be solved in the present invention is that five class special-shaped conductor monofilament easily break or break, and strand twists again and in extrusion process, is prone to the problems such as insulation cracking that loose flower and distorting stress cause.Proper mold when this must extrude by design plastics and rubber-covered, makes the insulation thickness that is coated on arc limit on special-shaped conductor approach calculated value to greatest extent.For solving the problems of the technologies described above, the invention provides a kind of tubular molding tool, work out the method for preparation five class special-shaped conductor cables.Five class conductors are transformed into abnormity, make just in time to form circle after special-shaped insulated wire cores stranding, greatly reduce the stranding packing material of cable core, reduce the deadweight of cable, also reduced laying up diameter, the material usage of later process has been reduced, thereby reduce cables manufacturing cost, also eliminated special-shaped conductor monofilament simultaneously and easily broken or break, strand twists again and in extrusion process, is prone to the insulation cracking phenomenon that loose flower and distorting stress cause.Avoid strand to twist again the loose colored phenomenon in extrusion process, after solution conductor die mould, arrive the problem of the fugitive type of take-up reel, thereby reduce cable quality cost.
The present invention for achieving the above object, by the following technical solutions:
A tubular molding tool, comprises core rod and die sleeve, it is characterized in that core rod is circular, and die sleeve is circular, and core rod has " proboscis ", during cooperation, core rod mouth and die sleeve mouth is maintained an equal level, and core rod and die sleeve composition are exclusively used in the tubular molding tool that plastic insulated cable is extruded use.It is characterized in that mold insert structure size is limited by core rod sizing area internal diameter, core rod sizing area outside cylinder diameter, core rod sizing area outside cylinder length, sizing area inner circle column length.Die sleeve structure size is subject to die sleeve sizing area diameter, die sleeve sizing area length restriction.
Utilize this tubular molding tool to prepare the method for special-shaped conductor cable, comprise the following steps:
1) select mould
The core rod that five class special-shaped conductors have adopted design when using plastic insulation for circular, die sleeve be circular tubular molding tool; Five class special-shaped conductors are when being used rubber insulation, and core rod is that circle, die sleeve are oval-shaped crowded tubular type die sleeve;
2) stranding
Insulated wire cores cabling mold and runner are shifted to an earlier date to pretwist, and the insulation thickness that makes to be to greatest extent coated on arc limit on special-shaped conductor approaches calculated value, to obtain minimum stranding and finished product external diameter.
Utilize this tubular molding tool to prepare the method for special-shaped conductor cable, wherein step 2) also comprise:
A) conductor pinch roller is adjusted to predefined angle, conductor is pressed into the angle needing;
B) wrapped to special-shaped conductor 50% gap that do not overlap with polyester film;
C) insulating barrier coating conductor forms special-shaped insulated wire cores;
D) thickness of insulating layer that makes to be to greatest extent coated on arc limit on conductor approaches calculated value;
E) circular by just in time forming after many insulated wire cores strandings;
F) the coated many insulated wire cores of restrictive coating form a kind of five class special-shaped conductor cables.
The special-shaped conductor cable that utilizes this tubular molding tool to prepare, comprise conductor, insulating barrier, restrictive coating, it is characterized in that: conductor is made abnormity, make to greatest extent the thickness of insulating layer that is coated on arc limit on conductor approach calculated value, insulating barrier coating conductor forms special-shaped insulated wire cores, after many special-shaped insulated wire cores strandings, just in time form circle, the coated many insulated wire cores of restrictive coating form a kind of five class special-shaped conductor cables.Described cross-sectional area of conductor is to divide equally circular 1/4 fan shape or for dividing equally circular 1/8 fan shape or for dividing equally circular 1/5 fan shape or for dividing equally circular 1/3 fan shape or for dividing equally circular 1/6 fan shape.Conductor pinch roller is adjusted to predefined angle, conductor is pressed into the angle needing, with insulating barrier, press 50% gap that do not overlap wrapped.Conductor pinch roller is adjusted to predefined angle, conductor is pressed into the angle needing, with insulating barrier, press overlapping wrapped.
The invention has the beneficial effects as follows: be exclusively used in the tubular molding tool that plastic insulated cable extrudes use circular just in time forming after special-shaped five class conductor insulation core strandings, avoid strand to twist again the loose colored phenomenon in extrusion process, after solution conductor die mould, arrive the problem of the fugitive type of take-up reel.Pretwist stranding makes laying up diameter minimum, eliminates distorting stress, makes to greatest extent the insulation thickness that is coated on arc limit on special-shaped conductor approach calculated value.Five novel class conductors, through abnormity design, have been saved packing material and sheath material, and external diameter also reduces greatly, thereby cable assembly is originally reduced.
Accompanying drawing explanation
Fig. 1 is the tubular molding tool of an embodiment of the present invention.
Fig. 2 is for squeezing the structure chart of tubular type core rod.
Wherein: d1-core rod sizing area internal diameter; D2-core rod sizing area outside cylinder diameter; L1-core rod sizing area outside cylinder length; L2-sizing area inner circle column length; L3-die sleeve sizing area length; M1-core rod overall diameter; Cone angle in α-core rod; β-core rod outside cone angle.
Fig. 3 is for squeezing the structure chart of tubular type die sleeve.
Wherein: d3-die sleeve sizing area diameter; L3-die sleeve sizing area length; Cone angle in γ-die sleeve.
Fig. 4 is five class special-shaped conductor cables and the traditional cable comparison diagram of an embodiment of the present invention.
Wherein: 1-conductor, 2-insulating barrier, 3-restrictive coating
Fig. 5 is cross section and the side of the five class special-shaped conductors of an embodiment of the present invention.
Wherein: 1---conductor 2---insulating barrier.
The specific embodiment
Below by the specific embodiment, by reference to the accompanying drawings the present invention is described in further detail.
Embodiment mono-:
Please refer to Fig. 1,2,3,4,5, mold insert structure size is subject to the effects limit such as core rod sizing area internal diameter, core rod sizing area outside cylinder diameter, core rod sizing area outside cylinder length, sizing area inner circle column length.Core rod sizing area inner diameter d 1 designs according to size and material and the external diameter alignment degree etc. of the wearability of the selection of material, semi-products (core or cable core) size, is generally designed to: during insulation, and d1=d
core+ (2～3) mm; During sheath, d1=d
core+ (3～7) mm.Conventionally, when designing mould specification, should consider seriation, die size is adjusted to integer; Core rod sizing area outside cylinder diameter d 2 is decided by d1 and wall thickness thereof, be d2=d1+2, the design of this wall thickness should be considered the life-span of core rod, consider again the tensile properties of plastics and extrude the factors such as tightness degree, generally all be designed to d2=d1+2(0.5～1.5) mm, core rod wall thickness is 0.5～1.5mm; Core rod sizing area outside cylinder length L 1 is considered the design of extrusion plastic shaping characteristic according to size d1, is generally designed to L1=(0.5～1) d1+(1～2) mm; Sizing area inner circle column length L2 size is determined by processing conditions and semi-products architectural characteristic, in any case L2 must, than the long 2～4mm of L1, be mainly the intensity that guarantees core rod mould mouth portion.
If vacuumize extruded mould, core rod hold wire diameter generally at 20-40mm.
Die sleeve structure size is subject to the effects limit such as die sleeve sizing area diameter, die sleeve sizing area length.Die sleeve sizing area diameter d 3 sizes by crowded tubular type core rod mould mouth outside diameter d2, core or conductor assembly outer diameter, extrude plastics thickness etc. because of usually design, be generally designed to d3=d2+2 thickness+stretching surplus; Die sleeve sizing area length L 3 sizes are often determined according to the length L 2 of the shaping characteristic of plastics and core rod sizing area outside cylinder, are generally designed to L3=L2-(1～6) mm, should meet L3=(0.5～1 simultaneously) d3mm, and also thickness hour removes the limit, otherwise, otherwise.
Die sleeve (2) hold wire diameter at 15-30mm.
Embodiment bis-
1) selection of mould
The core rod that five class special-shaped conductors have adopted design when using plastic insulation for circular, die sleeve be circular tubular molding tool.Five class special-shaped conductors are when being used rubber insulation, and core rod is that circle, die sleeve are oval-shaped crowded tubular type die sleeve.
2) conductor pinch roller is adjusted to predefined angle, five class conductors 1 are pressed into the angle (as 90 ℃, 120 ℃ etc.) needing, and then wrapped with polyester film 2 50% gap that do not overlap, so just formed five class special-shaped conductors as shown in Figure 1.
3) stranding
Insulated wire cores cabling mold and runner are improved, rule of thumb shift to an earlier date pretwist, make to greatest extent the insulation thickness that is coated on arc limit on special-shaped conductor approach calculated value, to obtain minimum stranding and finished product external diameter.As required, by 4 90 ℃ five class special-shaped conductor strandings, after insulated wire cores stranding, the external diameter of cable core is reduced,
After the novel cable stranding of left side, the outside diameter of cable is 39.44, and after the traditional cable stranding of right side, external diameter is 45.9.Five novel class conductors, through abnormity design, have been saved packing material and sheath material, and external diameter also reduces greatly, thereby cable assembly is originally reduced.
Above content is in conjunction with concrete embodiment further description made for the present invention, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, can also make some simple deduction or replace, all should be considered as belonging to protection scope of the present invention.
Claims (9)
1. a tubular molding tool, comprises core rod and die sleeve, it is characterized in that core rod is circular, and die sleeve is circular, and core rod has " proboscis ", during cooperation, core rod mouth and die sleeve mouth is maintained an equal level, and core rod and die sleeve composition are exclusively used in the tubular molding tool that plastic insulated cable is extruded use.
2. a kind of tubular molding tool according to claim 1, is characterized in that mold insert structure size is limited by core rod sizing area internal diameter, core rod sizing area outside cylinder diameter, core rod sizing area outside cylinder length, sizing area inner circle column length.
3. a kind of tubular molding tool according to claim 1, is characterized in that die sleeve structure size is subject to die sleeve sizing area diameter, die sleeve sizing area length restriction.
4. utilize a kind of tubular molding tool as claimed in claim 1 to prepare the method for special-shaped conductor cable, comprise the following steps:
1) select mould
The core rod that five class special-shaped conductors have adopted design when using plastic insulation for circular, die sleeve be circular tubular molding tool; Five class special-shaped conductors are when being used rubber insulation, and core rod is that circle, die sleeve are oval-shaped crowded tubular type die sleeve;
2) stranding
Insulated wire cores cabling mold and runner are shifted to an earlier date to pretwist, and the insulation thickness that makes to be to greatest extent coated on arc limit on special-shaped conductor approaches calculated value, to obtain minimum stranding and finished product external diameter.
5. utilize a kind of tubular molding tool as claimed in claim 1 to prepare the method for special-shaped conductor cable, wherein step 2) also comprise:
A) conductor pinch roller is adjusted to predefined angle, conductor is pressed into the angle needing;
B) wrapped to special-shaped conductor 50% gap that do not overlap with polyester film;
C) insulating barrier coating conductor forms special-shaped insulated wire cores;
D) thickness of insulating layer that makes to be to greatest extent coated on arc limit on conductor approaches calculated value;
E) circular by just in time forming after many insulated wire cores strandings;
F) the coated many insulated wire cores of restrictive coating form a kind of five class special-shaped conductor cables.
6. a special-shaped conductor cable that utilizes tubular molding tool as claimed in claim 1 to prepare, comprise conductor, insulating barrier, restrictive coating, it is characterized in that: conductor is made abnormity, make to greatest extent the thickness of insulating layer that is coated on arc limit on conductor approach calculated value, insulating barrier coating conductor forms special-shaped insulated wire cores, after many special-shaped insulated wire cores strandings, just in time form circle, the coated many insulated wire cores of restrictive coating form a kind of five class special-shaped conductor cables.
7. a kind of special-shaped conductor cable as claimed in claim 6, it is characterized in that, described cross-sectional area of conductor is to divide equally circular 1/4 fan shape or for dividing equally circular 1/8 fan shape or for dividing equally circular 1/5 fan shape or for dividing equally circular 1/3 fan shape or for dividing equally circular 1/6 fan shape.
8. a kind of special-shaped conductor cable as claimed in claim 6, is characterized in that, conductor pinch roller is adjusted to predefined angle, conductor is pressed into the angle needing, and presses 50% gap that do not overlap wrapped with insulating barrier.
9. any one special-shaped conductor cable as claimed in claim 6, is characterized in that, conductor pinch roller is adjusted to predefined angle, conductor is pressed into the angle needing, and presses overlapping wrapped with insulating barrier.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310624830.7A CN103600482B (en) | 2013-11-29 | 2013-11-29 | A kind of tubular molding tool and prepare special-shaped conductor cable |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310624830.7A CN103600482B (en) | 2013-11-29 | 2013-11-29 | A kind of tubular molding tool and prepare special-shaped conductor cable |
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| CN103600482A true CN103600482A (en) | 2014-02-26 |
| CN103600482B CN103600482B (en) | 2016-09-07 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409175A (en) * | 2014-11-20 | 2015-03-11 | 扬泰氟（清远）电线电缆有限公司 | Equipment and method of producing silicon rubber wires |
| CN111863354A (en) * | 2020-07-20 | 2020-10-30 | 宝胜科技创新股份有限公司 | Processing technology of easy-to-peel sheathed cable |
| CN112297383A (en) * | 2020-08-31 | 2021-02-02 | 扬州吉山津田光电科技有限公司 | Hollow pipe injection molding equipment with wide application range |
| CN112297382A (en) * | 2020-08-31 | 2021-02-02 | 扬州吉山津田光电科技有限公司 | Injection molding equipment of hollow pipe fitting |
| CN115148426A (en) * | 2022-08-05 | 2022-10-04 | 冯云力 | Die matching method of adjustable wire and cable extrusion die |
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| CN102509577A (en) * | 2011-10-28 | 2012-06-20 | 南洋电缆集团有限公司 | Silane halogen-free flame retardant cross-linking polyolefine cable and manufacturing method thereof |
| CN202422789U (en) * | 2012-02-15 | 2012-09-05 | 安徽华星电缆集团有限公司 | Environment-friendly nano composite high-polymer control cable |
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| CN202189624U (en) * | 2011-09-04 | 2012-04-11 | 鲁能泰山曲阜电缆有限公司 | Optical cable sheath covering automatic core fixing extrusion die |
| CN102509577A (en) * | 2011-10-28 | 2012-06-20 | 南洋电缆集团有限公司 | Silane halogen-free flame retardant cross-linking polyolefine cable and manufacturing method thereof |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104409175A (en) * | 2014-11-20 | 2015-03-11 | 扬泰氟（清远）电线电缆有限公司 | Equipment and method of producing silicon rubber wires |
| CN104409175B (en) * | 2014-11-20 | 2016-02-03 | 扬泰氟（清远）电线电缆有限公司 | Silicone rubber wire production equipment and production method |
| CN111863354A (en) * | 2020-07-20 | 2020-10-30 | 宝胜科技创新股份有限公司 | Processing technology of easy-to-peel sheathed cable |
| CN112297383A (en) * | 2020-08-31 | 2021-02-02 | 扬州吉山津田光电科技有限公司 | Hollow pipe injection molding equipment with wide application range |
| CN112297382A (en) * | 2020-08-31 | 2021-02-02 | 扬州吉山津田光电科技有限公司 | Injection molding equipment of hollow pipe fitting |
| CN115148426A (en) * | 2022-08-05 | 2022-10-04 | 冯云力 | Die matching method of adjustable wire and cable extrusion die |
| CN115148426B (en) * | 2022-08-05 | 2024-01-23 | 四川蓝电电缆科技有限公司 | Die matching method of adjustable wire and cable extrusion die |
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Effective date of registration: 20190327 Address after: 730900 Yindong Industrial Park, High-tech Industrial Development Zone, Baiyin District, Baiyin City, Gansu Province Patentee after: BAIYIN YOUSE CHANGTONG WIRE AND CABLE CO., LTD. Address before: 730900 Friendship Road, Baiyin District, Baiyin, Gansu Province, No. 96 Patentee before: Baiyin Nonferrous Metal Group Co., Ltd. |
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