CN103600481A - Extrusion-type mold and method for preparing special-shaped conductor cable by extrusion-type mold - Google Patents
Extrusion-type mold and method for preparing special-shaped conductor cable by extrusion-type mold Download PDFInfo
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- CN103600481A CN103600481A CN201310624731.9A CN201310624731A CN103600481A CN 103600481 A CN103600481 A CN 103600481A CN 201310624731 A CN201310624731 A CN 201310624731A CN 103600481 A CN103600481 A CN 103600481A
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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
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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
- H01B7/02—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)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses an extrusion-type mold for rubber insulated cable extrusion and a method for preparing a special-shaped conductor cable by the extrusion-type mold, and belongs to the technical field of wire cable manufacture. Through the 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 invention belongs to electric wire manufacturing technology field, particularly relate to a kind of special-shaped conductor cable and rubber insulation thereof and extrude and use plsitive mold technical field.
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 when being used rubber insulation, because rubber cable material packing material is high, this just causes intensity, draw ratio and the viscosity of its melt under molten condition and other cable material to exist larger difference, so also different to the apolegamy of mould, be first in the selection of extrusion way of mould.For extruding of rubber cable material, insulating exruded mould should be selected squash type, and in the process of sheathing, should select half squash type, could fully guarantee tensile strength and percentage elongation and the surface smoothness of material like this.Next is the selection of die sleeve, while using plsitive mold, because the viscosity of material is larger, make the pressure of head very large, when extruding while leaving mould, can expand to some extent, so die sleeve should be smaller than actual size, the mechanical performance of last rubber does not have plain edition CABLE MATERIALS superior, its draw ratio is little, only have about 2.5-3.2, so also will take into full account its tensile property when selecting mould, this just requires the apolegamy of die sleeve can not be excessive, otherwise the surface of cable is not fine and close, and extrude more loose.
Summary of the invention
The main technical problem to be solved in the present invention be five class special-shaped conductors 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, and the problems such as insulation cracking that cause of distorting stress.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 plsitive mold, work out the method for preparing special-shaped conductor cable.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.
For solving the problems of the technologies described above, the invention provides a kind of plsitive mold, comprise core rod, die sleeve, it is characterized in that core rod is that circle, die sleeve are for oval.Described mold insert structure size is subject to core rod outside cone angle, core rod outer cone maximum gauge, core rod inner cone maximum gauge, core rod pitch-row, core rod outer cone minimum diameter, core rod sizing area length and core rod centrum length restriction.The physical dimension of described die sleeve is limited by cone angle, die sleeve sizing length, die sleeve wedge thickness, die sleeve external diameter and die sleeve overall length in die sleeve wedge external diameter, inner cone maximum gauge, die sleeve sizing area diameter, tapered sleeve.
Described a kind of plsitive mold is prepared the method for special-shaped conductor cable, comprises the following steps:
1) select mould
Five class special-shaped conductors when using plastic insulation, adopt core rod for circular, die sleeve be circular plsitive mold; Five class special-shaped conductors are when being used rubber insulation, and adopting core rod is that circle, die sleeve are oval-shaped squash 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.
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.
A kind of special-shaped conductor cable that utilizes described plsitive mold 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.
Outside cone angle φ is according to handpiece structure and plastic flow characteristics design, and cone angle is controlled at below 45 °, and angle is less, and runner is more level and smooth, suddenlys change little, useful to rubber layer structure; Core rod outer cone maximum dimension D size is to be determined by the size of core rod supporter (or core rod seat), requires strictly to coincide, and must not occur " foreground ", also can not occur " backstage ", otherwise will cause, deposits glue dead angle, directly affects rubber layer tissue and surface quality; Inner cone maximum dimension D size depends mainly on the wall thickness of processing conditions and core rod double-screw bolt, is guaranteeing that under the prerequisite of screw strength and wall thickness, D is the bigger the better, and is convenient to threading; Core rod aperture d is to extruding the physical dimension of quality influence maximum, press core architectural characteristic and size design thereof, generally, single line Qud=wire core diameter+(0.05～0.15) mm, stranded core are got d=core external diameter+(0.1～0.25) mm, can not be too large, can not be too little; Core rod outer cone minimum diameter d determines the size of core rod outlet port thickness, port thickness △=1/2(d-d) can not be too thin, otherwise affect service life, also should not be too thick, otherwise rubber runner undergos mutation, and form vortex, cause the fluctuation of extrusion pressure, and easily form dead angle, and affecting rubber layer quality, the wall thickness of general core rod outlet port is controlled 0.5～1mm again and is advisable; Core rod sizing area length L determines that core is by the stability of core rod, but can not design oversize, otherwise will cause processing difficulties, general L=(0.5～1.5) d, and core rod aperture d selects lower limit when larger, otherwise, otherwise; Core rod cone length L is the reference dimension that design provides, and L can determine according to the size of above-mentioned decision, if oversize or too short, with head internal structure mismate, can turn back to revise cone angle φ, and then calculate L until suitable.Die sleeve can take to be applicable to a kind of form.The physical dimension of die sleeve is subject to the effects limit such as die sleeve wedge external diameter, inner cone maximum gauge, die sleeve sizing area diameter, the interior cone angle of tapered sleeve, die sleeve sizing length, die sleeve wedge thickness, die sleeve external diameter and die sleeve overall length.Die sleeve wedge outer diameter D designs according to die sleeve seat (or handpiece structure inner diameter of steel flue), be generally less than barrel dliameter endoporus 0.5～1.5mm, this gap is that technique is adjusted core shift, guaranteed the necessary factor of concentricity, and gap can not be too little, otherwise can not meet the needs of tuningout; Gap is too greatly also not all right, because the too large steadiness that affects die sleeve even occurs from line skew in extrusion; Inner cone maximum dimension D ' be one of precise measure of die sleeve design, its size must be strict consistent with die sleeve seat (or head inner cone) end internal diameter, otherwise will produce ladder dead angle after assembling die sleeve, and this is that technique institute is unallowed; Die sleeve sizing area diameter d is one of precise measure of die sleeve design, and extrude rubber characteristic according to product diameter, each procession parameters and strictly design, general d=finished product nominal diameter+(0.15～0.25) mm; In die sleeve, cone angle φ is by D ', d and the restriction of die sleeve length, angle φ is subject to again the restriction of the outside cone angle of the core rod supporting with it simultaneously, angle φ must be greater than 3～10 ° of core rod outside cone angles, if there is no this differential seat angle, just do not guarantee extrusion pressure, certainly extrusion pressure can not be too large, because can affect and extrude output like this, therefore differential seat angle can not be too large, angle φ is the same with D ', d all can not be designed by reference dimension, therefore three size accurate calculating simultaneously, mutually revise, and work in-process are adjusted according to size l and L; Die sleeve sizing area length l is generally got l=(1～3) d is advisable, longer favourable to shaping, but longer resistance is larger, affects output, so, when d is larger, can not capping; Die sleeve wedge thickness b presses the die sleeve seat degree of depth (or head inner core exit degree of depth) design, generally wants large 0.3～0.5mm; Die sleeve outside diameter d ' be generally less than gland endoporus 2～3mm according to die sleeve gland bore design, but also unsuitable too small, otherwise excesssive gap will cause heat radiation inhomogeneous; Die sleeve overall length L is the reference dimension that design provides, and by b and adjustable length a, is determined.
The invention has the beneficial effects as follows: 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.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.
Accompanying drawing explanation
Fig. 1 is an embodiment of the present invention plsitive mold.
Fig. 2 is plsitive mold mold insert structure figure
Code description in Fig. 2: 1-core rod pitch-row d; 2-core rod outer cone minimum diameter d; 3-core rod sizing area length L; 4-core rod cone length L; 5-core rod inner cone maximum gauge; 6-core rod interior diameter M; 7-core rod overall diameter B; 8-core rod outer cone maximum dimension D; 9-core rod outside cone angle φ; Cone angle φ in 10-core rod.
Fig. 3 is plsitive mold die sleeve structure figure
Code description in Fig. 3: 1-die sleeve sizing area diameter d; 2-die sleeve outside diameter d '; 3-die sleeve sizing area length l; 4-adjustable length a; 5-die sleeve wedge thickness b; 6-die sleeve overall length L; 7-die sleeve wedge outer diameter D; 8-inner cone maximum dimension D '; Cone angle φ in 9-die sleeve.
Fig. 4 is plsitive mold die sleeve structure contrast schematic diagram
Code description in Fig. 4: 1-die sleeve sizing area diameter d; 2-die sleeve outside diameter d '; 7-die sleeve wedge outer diameter D; 10-die sleeve inside dimension H.
Fig. 5 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. 6 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. 1,2,3,4,5,6, cable is coordinated and is formed by " without mouth " core rod and any die sleeve with plsitive mold.Plsitive mold is that depended on pressure is realized the last sizing of product, and rubber, by the extruding of mould, is directly extruded on core and cable core, and the plastic layer close structure of extruding is solid.The rubber extruding can embed in the gap of core or cable core, is combined closely zero-clearance with goods, and the dielectric strength that extrudes layer is reliable, and outer surface is smooth smooth.But this die adjustment core shift is difficult for, and easily wearing and tearing, especially, when core and cable core have bending, easily cause rubber layer core shift serious; Product quality is larger to mould dependence, squeezes rubber high to joining the accuracy requirement of mould.Because the cooperation angular difference of core rod and die sleeve determines to affect the size of final pressure rubber layer quality and extrude output; Core rod and die sleeve size are also directly determining geometry size and the surface quality of extruded product, and the composite factors such as " expansion " after pressure relief and cooled contraction must be considered in die sleeve moulding section aperture.And its aperture size is also very strict with regard to core rod.Core rod aperture is too little, and obviously core or cable core can't pass, and too conference causes and extrudes core shift.In addition, because extruded type mould has produced larger reaction force at the die orifice place extruding, extrude output squeeze tubular type will be low many.
The physical dimension of plsitive mold " without mouth " core rod
After material decision, with the reasonability of technique, the possibility of taking into account processing appropriately designs each size, and the main points that should note are as follows:
1) outside cone angle φ: according to handpiece structure and plastic flow characteristics design, cone angle is controlled at below 45 °, and angle is less, and runner is more level and smooth, suddenlys change little, useful to rubber layer structure.When extruding EPDM, haloflex etc. and mix rubber, the avoiding of the reserved internal stress that sudden change is caused is even more important, and only has and fully noted the effectively crack resistance energy of raising goods.The size of angle often determines according to head inside result feature.
2) core rod outer cone maximum dimension D: this size is to be determined by the size of core rod supporter (or core rod seat), require strict coincideing, must not occur " foreground ", also can not occur " backstage ", otherwise will cause, deposit glue dead angle, directly affect rubber layer tissue and surface quality.
3) inner cone maximum dimension D: this size depends mainly on the wall thickness of processing conditions and core rod double-screw bolt, is guaranteeing that under the prerequisite of screw strength and wall thickness, D is the bigger the better, and is convenient to threading.
4) core rod aperture d: this is to extruding the physical dimension of quality influence maximum, by core architectural characteristic and size design thereof.Generally, single line Qud=wire core diameter+(0.05～0.15) mm; Stranded core is got d=core external diameter+(0.1～0.25) mm.Can not be too large, can not be too little.Because excessive, form first the swing of core and cause and extrude core shift, moreover there will be down glue, both harmfully extrude a layer quality, likely cause again broken string.And too small, easy scratch core, also makes reduce die life.
5) core rod outer cone minimum diameter d:d is actually the size that determines core rod outlet port thickness, port thickness △=1/2(d-d) can not be too thin, otherwise affect service life; Also should not be too thick, otherwise rubber runner undergos mutation, and form vortex, and cause the fluctuation of extrusion pressure, and easily form dead angle, affect rubber layer quality, the wall thickness control of general core rod outlet port again 0.5～1mm is advisable.
6) core rod sizing area length L: L determines that core is by the stability of core rod, but can not design oversize, otherwise will cause processing difficulties, general L=(0.5～1.5) d, and core rod aperture d selects lower limit when larger, otherwise, otherwise.
7) core rod cone length L: this designs the reference dimension providing often, is not difficult to find out from the graph,
tgφ∕2=（D－d）∕2L
L＝（D－d）∕2（tgφ∕2）
So L can determine according to the size of above-mentioned decision, determines as calculated the length of L, if oversize or too short, with head internal structure mismate, can turn back to revise cone angle φ, and then calculate L until suitable.
The physical dimension of squash type die sleeve
1) die sleeve wedge outer diameter D: design according to die sleeve seat (or handpiece structure inner diameter of steel flue), be generally less than barrel dliameter endoporus 0.5～1.5mm, this gap is that technique is adjusted core shift, guaranteed the necessary factor of concentricity, and gap can not be too little, otherwise can not meet the needs of tuningout; Gap is too greatly also not all right, because the too large steadiness that affects die sleeve even occurs from line skew in extrusion.
2) inner cone maximum dimension D ': this is one of precise measure of die sleeve design.Its size must be strict consistent with die sleeve seat (or head inner cone) end internal diameter, otherwise will produce ladder dead angle after assembling die sleeve, and this is that technique institute is unallowed.
3) die sleeve sizing area diameter d: this is again one of precise measure of die sleeve design.And extrude rubber characteristic according to product diameter, each procession parameters strictly designs.General d=finished product nominal diameter+(0.15～0.25) mm.
4) cone angle φ in die sleeve: angle φ is by D ', d and the restriction of die sleeve length, angle φ is subject to again the restriction of the outside cone angle of the core rod supporting with it simultaneously, angle φ must be greater than 3～10 ° of core rod outside cone angles, if there is no this differential seat angle, just do not guarantee extrusion pressure, certainly extrusion pressure can not be too large, because can affect and extrude output like this, so differential seat angle can not be too large.Angle φ is the same with D ', d all can not be designed by reference dimension, and therefore three size accurate calculating simultaneously, mutually revise, and work in-process are adjusted according to size l and L.
5) die sleeve sizing area length l: generally get l=(1～3) d is advisable, longer favourable to shaping, but longer resistance is larger, affects output.So, when d is larger, can not capping.
6) size of H has determined the pressure of sizing material in die sleeve, and coated power, the good fluidity of excessive sizing material, and gel quantity is large, but the degree of eccentricity is wayward.So H=finished product nominal diameter * 1.3+(0.15～0.3) mm.
7) die sleeve wedge thickness b: press the die sleeve seat degree of depth (or head inner core exit degree of depth) design, generally want large 0.3～0.5mm.
8) die sleeve outside diameter d ': according to die sleeve gland bore design, be generally less than gland endoporus 2～3mm, but also unsuitable too small, otherwise excesssive gap will cause dispel the heat inhomogeneous.
9) die sleeve overall length L: this is the reference dimension that design provides, and is determined by b and adjustable length a.
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 plsitive mold.Five class special-shaped conductors are when being used rubber insulation, and core rod is that circle, die sleeve are oval-shaped squash 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.
As required, by 3 120 ℃ five class special-shaped conductor strandings, after insulated wire cores stranding, the external diameter of cable core is reduced.
Trial result
Through trial-production repeatedly relatively, the core rod that five class special-shaped conductors have adopted design when using plastic insulation for circular, die sleeve be circular plsitive mold.Five class special-shaped conductors are when being used rubber insulation, and core rod is that circle, die sleeve are oval-shaped plsitive mold.
Cost comparative analysis
Mould power cable cost contrast table
| Model | Specification | Laying up diameter mm | Insulation kg | Sheath kg |
| YJVR | 4*70 (circle) | ? | ? | ? |
| VVR | 4*70(circle) | ? | ? | ? |
| YJVR | 4*70 (fan) | 25.3 | ? | ? |
| VVR | 4*70 (fan) | 26.74 | ? | ? |
Rubber cable cost contrast table
| Model | Specification | Laying up diameter mm | Insulation kg | |
| YC | ||||
| 3*70 (circle) | 31.7 | 362.5 | 1180.8 | |
| |
3*70(fan) | 27.7 | ? | 706 |
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 (8)
1. a plsitive mold, comprises core rod, die sleeve, it is characterized in that core rod is that circle, die sleeve are for oval.
2. a kind of plsitive mold as claimed in claim 1, it is characterized in that, described mold insert structure size is subject to core rod outside cone angle, core rod outer cone maximum gauge, core rod inner cone maximum gauge, core rod pitch-row, core rod outer cone minimum diameter, core rod sizing area length and core rod centrum length restriction.
3. a kind of plsitive mold as claimed in claim 1, it is characterized in that, the physical dimension of described die sleeve is limited by cone angle, die sleeve sizing length, die sleeve wedge thickness, die sleeve external diameter and die sleeve overall length in die sleeve wedge external diameter, inner cone maximum gauge, die sleeve sizing area diameter, tapered sleeve.
4. utilize a kind of plsitive mold as claimed in claim 1 to prepare the method for special-shaped conductor cable, comprise the following steps:
1) select mould
Five class special-shaped conductors when using plastic insulation, adopt core rod for circular, die sleeve be circular plsitive mold; Five class special-shaped conductors are when being used rubber insulation, and adopting core rod is that circle, die sleeve are oval-shaped squash 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 plsitive mold 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 plsitive mold 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, 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310624731.9A CN103600481A (en) | 2013-11-29 | 2013-11-29 | Extrusion-type mold and method for preparing special-shaped conductor cable by extrusion-type mold |
Applications Claiming Priority (1)
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Cited By (8)
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| CN104167260A (en) * | 2014-08-06 | 2014-11-26 | 山东省农业机械科学研究院 | Cable extrusion test run technology |
| CN104966583A (en) * | 2015-06-16 | 2015-10-07 | 深圳宝兴电线电缆制造有限公司 | Carbon fiber electrocardiograph cable for defibrillator monitor |
| CN106346733A (en) * | 2016-09-16 | 2017-01-25 | 芜湖市旭辉电工新材料有限责任公司 | Cable insulation extrusion process capable of realizing automatic regulation of concentricity |
| 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 |
| 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 |
| CN113611440A (en) * | 2021-08-04 | 2021-11-05 | 江阴金属材料创新研究院有限公司 | High-strength damping special-shaped copper alloy ultra-micro wire harness and production process thereof |
| CN113744935A (en) * | 2021-09-08 | 2021-12-03 | 中天科技海缆股份有限公司 | Processing method of cable core, cable core and cable |
| CN114498236A (en) * | 2022-01-17 | 2022-05-13 | 吉林重通成飞新材料股份公司 | Design method for wind power blade cable parallel clamp and pressing die |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104167260A (en) * | 2014-08-06 | 2014-11-26 | 山东省农业机械科学研究院 | Cable extrusion test run technology |
| CN104966583A (en) * | 2015-06-16 | 2015-10-07 | 深圳宝兴电线电缆制造有限公司 | Carbon fiber electrocardiograph cable for defibrillator monitor |
| CN106346733A (en) * | 2016-09-16 | 2017-01-25 | 芜湖市旭辉电工新材料有限责任公司 | Cable insulation extrusion process capable of realizing automatic regulation of concentricity |
| CN106346733B (en) * | 2016-09-16 | 2019-02-19 | 保定京阳立津线缆制造有限公司 | A kind of cable insulation extrusion process of automatic concentricity adjusting |
| 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 |
| 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 |
| CN113611440A (en) * | 2021-08-04 | 2021-11-05 | 江阴金属材料创新研究院有限公司 | High-strength damping special-shaped copper alloy ultra-micro wire harness and production process thereof |
| CN113744935A (en) * | 2021-09-08 | 2021-12-03 | 中天科技海缆股份有限公司 | Processing method of cable core, cable core and cable |
| CN114498236A (en) * | 2022-01-17 | 2022-05-13 | 吉林重通成飞新材料股份公司 | Design method for wind power blade cable parallel clamp and pressing die |
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