CN109346246A - A kind of manufacturing method of double-layer coextrusion insulated copper bar - Google Patents
A kind of manufacturing method of double-layer coextrusion insulated copper bar Download PDFInfo
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- CN109346246A CN109346246A CN201811152113.8A CN201811152113A CN109346246A CN 109346246 A CN109346246 A CN 109346246A CN 201811152113 A CN201811152113 A CN 201811152113A CN 109346246 A CN109346246 A CN 109346246A
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- copper bar
- double
- manufacturing
- layer
- layer coextrusion
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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
- H01B13/141—Insulating conductors or cables by extrusion of two or more insulating layers
-
- 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
- H01B13/148—Selection of the insulating material therefor
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a kind of manufacturing methods for the double-layer coextrusion insulated copper bar being provided in the rail bar or busbar connector field of multiple separation link positions for matching piece, include the following steps, copper bar A, is continuously extruded into copper bar by pressurizing unit；B, the copper bar lopping of extrusion forming is packed；C, the copper bar of lopping packaging is unfolded, is formed simultaneously inside and outside insulating layer with extruder double-layer coextrusion, inner insulating layer is silane crosslinked polyethylene, and external insulation layer is silane crosslinked halogen-free low-smoke flame-proof polyolefin insulating materials；D, the copper bar for being extruded into inside and outside insulating layer is subjected to vapor crosslinking；E, molding copper bar is detected；F, lopping is put in storage.The present invention solves the problems, such as that existing copper bar electrical insulation properties are poor.
Description
Technical field
The present invention relates to rail bar or busbar connector fields that multiple separation link positions are provided with for matching piece, and in particular to one
The manufacturing method of the double-layer coextrusion insulated copper bar of kind.
Background technique
During high-building construction, there are many places to transmit electrical energy using power cable.It has many excellent
Point, the shortcomings that also having it: big specification power cable between floors long length installation, in use process, cannot there is low-angle
Or right angle installation, it otherwise can damage the structure of power cable.
Copper bar is a kind of conducting heavy current product, is suitable for high and low voltage electrical equipment, switch contact, controller switching equipment, bus duct etc.
Electro-engineering.Since copper bar is bigger than cross-section of cable product, good heat dissipation effect, so large current load or power supply generally use copper bar female
Line is attached.Since copper bar electrical current is larger, for usually requiring to do corresponding protection when interior, and existing copper bar one
As using naked copper row or the jacketed heat-shrink tube on copper bar, cannot carry out insulating protection well, in use process there are it is following not
Foot: 1, naked copper row it is exposed mutual spacing is big when in use in air, the space of waste is big；2, naked copper row is exposed to outer be easy
Safety accident is caused, and copper material is easy to oxidize, corrosion resistance is poor, can get rusty after being connected to lightning conducter, play halogen, will cause copper bar
Electric conductivity decline；3, existing copper bar bending property is bad, not can be carried out insulating exruded；4, existing copper bar generally adds when in use
Heat-shrink tube is covered, heat gun or gas burner are used when jacketed heat-shrink tube, needs manual operation, be easy to cause heat-shrink tube heated not
, it is horizontal to influence copper bar electric insulation for trapped air inside heat-shrink tube；5, connect when existing copper bar needs to lengthen connection in end
After connecing, connecting portion is exposed to outside, and there are security risks, big using individual shield or protection box occupied space, and installation is not
It is convenient.
Summary of the invention
The invention is intended to provide a kind of manufacturing method of double-layer coextrusion insulated copper bar, to solve existing copper bar electric insulating quality
The problem of energy difference.
In order to achieve the above objectives, basic technology scheme of the invention is as follows: a kind of manufacturer of double-layer coextrusion insulated copper bar
Method, comprising the following steps:
A, copper bar is continuously extruded into copper bar by pressurizing unit；
B, the copper bar lopping of extrusion forming is packed；
C, the copper bar of lopping packaging is unfolded, is formed simultaneously inside and outside insulating layer with extruder double-layer coextrusion, inner insulating layer is
Silane crosslinked polyethylene, external insulation layer are silane crosslinked halogen-free low-smoke flame-proof polyolefin insulating materials；
D, the copper bar for being extruded into inside and outside insulating layer is subjected to vapor crosslinking；
E, molding copper bar is detected；
F, lopping is put in storage.
The principle of this programme is: when practical application, copper bar is continuously extruded into after copper bar after testing, at disk packaging, bilayer
Co-extrusion, vapor crosslinking, lopping, detection and storage step.Copper bar is through being continuously extruded into copper bar, as conductive conductor.Insulation material
Material includes primary insulation material and outer layer insulation material, and primary insulation material is silane crosslinked polyethylene, outer layer insulation material
Material is silane crosslinked halogen-free low-smoke flame-proof polyolefin insulating materials, has excellent electric property and protective value；Extruder squeezes
Inside and outside insulating layer is formed simultaneously using double-layer coextrusion when out, by the way of vapor crosslinking, greatly reinforces inside and outside insulating layer
Comprehensive performance.And then form the copper bar with good insulating performance and environmental resistance.
The advantages of this programme is: 1, insulating materials is that co-extrusion is formed two layers of insulation material simultaneously, and interior insulation material uses silicon
Alkane cross-linking polyethylene materials, electrical insulation properties are very good, although the ability of resistance to environment is poor, because internal layer is not directly contacted with
Environment, this disadvantage are just overcome.Outer insulating material uses silane cross-linked polyolefin insulating materials, and resistance to environment capacity is very
Good, low temperature resistant, ultraviolet light, high temperature, anti-aging, waterproof, moisture-proof etc. are fine, although the electric insulating quality of outer layer insulation material
Can be not so good, but mainly contacted by primary insulation material with core material, electric property is undertaken by primary insulation material, this disadvantage
Just it is overcome.2, the long-term use temperature of inside and outside Insulation Material can be at 125 degree, that is, inside and outside Insulation Material is distinguished at the same time
Two aspects for meeting electrical property and environmental requirement can be with The Gift of Being the Best You Can Be.3, since inside and outside insulating materials uses while squeezing out (altogether
Squeeze) mode produce, forms external insulation material in the molten state complete integrated, by the way of vapor crosslinking, significantly
Reinforce the comprehensive performance of external insulation.4, exhausted using silane crosslinked polyethylene and silane crosslinked halogen-free low-smoke flame-proof polyolefin
Edge material is halogen-free factor in insulating materials so that production, use, recycling entire link in, environmental pollution is seldom；
5, since be allowed to for long row pattern also can be in low-angle while keeping excellent big specification power transmission performance for it in structure
Or the double hyer insulation protective layer for carrying out normal mounting use under right angle context, and using is with excellent electric insulation and resistance to
Ambient dielectric performance is more suitable for carrying out the high-power power transmission of long length between floors, and usage safety performance is high.
Further, copper bar carries out removing surface and the feeding in vacuum environment, vacuum before entering pressurizing unit in step A
The air pressure of environment is 0.05MPa.Water or oil as preferred copper bar surface attachment avoidable in this way exist in the process continuously extruded
Copper bar surface forms air blister defect, guarantees copper bar surface quality, can be to the copper for going water removal and oil by the vacuum environment of 0.05MPa
Bar carries out anti-oxidation isolation, reduces copper bar surface attachments, copper bar clean surface is further ensured that, so that the copper bar of extrusion molding
Better quality.
Further, in step C in extrusion process control extrusion pressure be 40-60MPa, extruded velocity 20-40m/min,
Extrusion temperature is 125-135 DEG C.Preferable stream is able to maintain as layer insulating materials inside and outside preferably under such extrusion temperature
Dynamic property and viscosity, cooperate the control of extruded velocity and extrusion pressure so that on copper bar insulating layer thickness uniformity, insulation
The even density of layer material, performance are stablized, and have better insulation protection performance.
Further, the thickness for primary insulation material being controlled in step C accounts for 12%-the 20% of insulating materials overall thickness, outer layer
The thickness of insulating materials accounts for 88%-the 80% of insulating materials overall thickness.As be preferably placed such that so that have excellent electric it is exhausted
The primary insulation material of edge performance guarantees to reduce dosage cost while electric insulation effect, and has excellent environmental resistance
Outer layer insulation material has bigger thickness, can guarantee the knot of primary insulation material and conductor when facing various use environments
Structure can completely stablize use, so that copper bar has longer service life, while primary insulation material and outer layer insulation material
Thickness proportion be rectangle for section or when the copper bar of strip, have at the narrow side of copper bar and seamed edge more stable
Adhesion property is not in insulating layer disengaging or chap at narrow side and seamed edge when especially copper bar is installed and used for low-angle
It splits.
Further, the environment temperature that vapor crosslinking is controlled in step D is 60-65 DEG C, and the time of vapor crosslinking is 3-3.5h.
As being preferably placed such that so as to be capable of forming performance between primary insulation material and outer layer insulation material stable, structure blending
The comprehensive performance of excessive articulamentum, inside and outside layer insulating materials is more preferable.
Further, the pressurizing unit in step A includes extruding wheel, and the wheel face of extruding wheel, which is equipped with, squeezes slot, outside extruding wheel
Side is equipped with press shoe, and press shoe is equipped with the cambered surface portion being bonded with the wheel face of extruding wheel, forms arc between extruding wheel and press shoe
The extrusion chamber of shape is fixed with plug, the setting of another end opening, cambered surface of the extrusion chamber close to plug in the press shoe of extrusion chamber one end
Extrusion road is offered on portion's side wall, the vacuum box covered on the wheel face of extruding wheel is installed, very on the outside of extruding cavity open end
The rotation spray air-casing towards copper bar is equipped in sylphon, copper bar is inserted into extruding wheel after passing through vacuum box, rotation spray air-casing in step A
It squeezes in slot.As preferred copper bar in this way by squeeze after slot positioning from the open end of extrusion chamber be inserted into extruding wheel and press shoe it
Between, frictional force during extruding wheel rotation between copper bar and extruding slot constantly pushes copper bar into extrusion chamber, copper bar
Make copper bar be warming up to 625 DEG C with the frictional heat generation of extruding wheel, and then is squeezed and deformed from the discharge of extrusion road and is shaped to copper bar, copper bar
Circumferential jetting type water elimination oil removing is carried out with rotary jet set in vacuum box before into extrusion chamber, it is ensured that molding copper bar surface matter
Excellent zero defect is measured, vacuum environment guarantees that copper bar to be extruded keeps clean.
Further, vacuum box is communicated with vacuum pump, and gearbox, the exhaust of vacuum pump are connected between vacuum pump and extruding wheel
End is connected to rotation spray air-casing, and rotation spray air-casing includes the annular sleeve for the hollow structure being fixed in vacuum box, rotation spray air-casing
Inner sidewall on be evenly distributed with multiple inclined gas vents in the same direction in a ring, the inner sidewall of rotation spray air-casing is in cone cylinder shape, cone
The bigger diameter end of cylinder is towards press shoe.As preferably rotating as vacuum pump and the power of rotary jet using extruding wheel in this way,
Can the effectively save energy, and formed to the rotational pressure air-flow on copper bar surface by the structure of rotation spray air-casing by copper bar surface
Water, oil or other impurities are washed off；Using cone cylinder shape rotation spray air-casing inner wall and limit direction so that air-flow is in rotation spray air-casing
It is interior to be gradually increased from bigger diameter end to the pressure that miner diameter end air-flow sprays, and the air-flow of miner diameter end takes the lead in carrying out pressure to copper bar surface
Bigger flushing, in order to wash out the impurity of attachment without causing blastic deformation to copper bar surface, and the impact force of bigger diameter end
It is relatively small, when further a small amount of impurity of copper bar surface remaining is fallen in impact avoid that copper bar surface is caused to damage.
Further, the removing surface in step A is to be sent into rotation spray air-casing with vacuum pump intake-gas, by gas from exhaust
Hole, which is sprayed, blows away the water and oil being attached on copper bar to copper bar surface injection swirling eddy, and the air pressure of swirling eddy is 3-9MPa.
As comprehensively can preferably removing the water, oil or impurity on surface from the circumferential direction of copper bar in this way, and the impact of air-flow will not be
Copper bar surface is left a trace, so that copper bar clean surface, guarantees to keep stablizing between extruding wheel after copper bar enters extrusion chamber
Friction, reduce copper bar and be carried along into the impurity in extrusion chamber, guarantee to squeeze out inside copper bar and surface there is no water, oil or other
Defect caused by impurity.
Further, the bottom of vacuum box is equipped with the scraper plate in insertion extruding slot, scraper plate and the tangent setting of slot bottom for squeezing slot.
It is cleared up as being preferably placed such that inside the sustainable extruding slot to outside vacuum box of scraper plate.
Further, attachment is struck off to slot inner wall is squeezed by scraper plate before copper bar enters and squeezes slot.As preferably this
Sample can clear up the attachment squeezed on slot inner wall in extruding wheel rotation process by scraper plate, protect so that squeezing slot inner wall
Cleaning is held, copper bar maintains preferable frictional force between extruding slot inner wall after entering, so that extruding wheel passes the friction of copper bar
It send and frictional heating keeps stablizing.
Detailed description of the invention
Fig. 1 is the structure diagram of pressurizing unit in the embodiment of the present invention 1；
Fig. 2 is the axial cross-sectional view of rotation spray air-casing in the embodiment of the present invention 1.
Specific embodiment
It is further described below by specific embodiment:
Appended drawing reference in Figure of description include: press shoe 1, extruding wheel 2, copper bar 3, vacuum box 4, rotation spray air-casing 5,
Gas vent 51, bigger diameter end 53, squeezes slot 6, extrusion chamber 7, plug 8, squeezes road 9, scraper plate 10 miner diameter end 52.
A kind of embodiment 1: manufacturing method of double-layer coextrusion insulated copper bar, comprising the following steps:
A, copper bar being continuously extruded into copper bar by pressurizing unit, copper bar carries out removing surface before entering pressurizing unit,
Removing surface is to be sent into rotation spray air-casing with vacuum pump intake-gas, and gas is sprayed from gas vent to copper bar surface and sprays rotation
Air-flow blows away the water, oil or other impurities being attached on copper bar, and the air pressure of swirling eddy is 3MPa, in vacuum after removing surface
Feeding in environment, the air pressure of vacuum environment are 0.05MPa；It is scraped by scraper plate to slot inner wall is squeezed before copper bar enters and squeezes slot
Except attachment；
B, the copper bar lopping of extrusion forming is packed；
C, the copper bar of lopping packaging is unfolded, is formed simultaneously inside and outside insulating layer with extruder double-layer coextrusion, inner insulating layer is
Silane crosslinked polyethylene, external insulation layer are silane crosslinked halogen-free low-smoke flame-proof polyolefin insulating materials；It is controlled in extrusion process
Extrusion pressure processed is 40MPa, and extruded velocity 20m/min, extrusion temperature is 125 DEG C, so that the thickness of primary insulation material accounts for
The 12% of insulating materials overall thickness, the thickness of outer layer insulation material account for the 88% of insulating materials overall thickness；
D, the copper bar for being extruded into inside and outside insulating layer is subjected to vapor crosslinking, the environment temperature for controlling vapor crosslinking is
60 DEG C, the time of vapor crosslinking is 3h；
E, molding copper bar is detected；
F, lopping is put in storage.
The present embodiment also provides a kind of pressurizing unit, as shown in Figure 1, including extruding wheel 2, the wheel face of extruding wheel 2 is equipped with
Slot 6 is squeezed, the cross sectional shape for squeezing slot 6 is identical as the half section shape of copper bar 3, and press shoe 1 is equipped on the outside of extruding wheel 2, squeezes
Boots 1 are equipped with the cambered surface portion being bonded with the wheel face of extruding wheel 2, and the extrusion chamber 7 of arc is formed between extruding wheel 2 and press shoe 1, squeeze
It presses and is fixed with plug 8, the setting of another end opening in the press shoe 1 of 7 one end of chamber, extrusion chamber 7 is on the cambered surface portion side wall of plug 8
Extrusion road is offered, is equipped on the outside of extruding cavity open end and covers vacuum box 4 on the wheel face of extruding wheel 2, in vacuum box 4
Equipped with the rotation spray air-casing 5 towards copper bar 3.Vacuum box 4 is communicated with vacuum pump, is connected with speed change between vacuum pump and extruding wheel 2
The exhaust end of case, vacuum pump is connected to rotation spray air-casing 5, and as shown in connection with fig. 2, rotation spray air-casing 5 includes being fixed in vacuum box 4
Hollow structure annular sleeve, multiple inclined gas vents in the same direction are evenly distributed on the inner sidewall of rotation spray air-casing 5 in a ring
51, the inner sidewall of rotation spray air-casing 5 is in cone cylinder shape, and the bigger diameter end 53 of cone cylinder is towards press shoe 1.The bottom welding of vacuum box 4 is inserted
Enter to squeeze the scraper plate 10 in slot 6, scraper plate 10 and the tangent setting of slot bottom for squeezing slot 6.
Copper bar 3 is penetrated from the miner diameter end 52 of cone cylinder when use, is pierced by from bigger diameter end 53, subsequently into the extruding of extruding wheel 2
In slot 6.Extruding wheel 2 drives vacuum pump fortune by speed-changing gear box while extruding wheel 2 rotates by additional motor driven
Turning, vacuum pump detaches the gas in vacuum box 4 to form negative pressure, an air inlet pipe is in addition connected at the bleeding point of vacuum pump, into
The sectional area of tracheae is less than the sectional area of vacuum pump and 4 connectivity part of vacuum box, and it is relatively steady to form pressure in guarantee vacuum box 4 in this way
Fixed subnormal ambient.The gas that vacuum box 4 detaches enters the bigger diameter end 53 of rotation spray air-casing 5, ring of the gas in rotation spray air-casing 5
It flows in shape cavity and is formed from the discharge of gas vent 51 from bigger diameter end 53 to the forced draft of 52 rotational flow of miner diameter end, pressure gas
Stream in a ring purges the surface of copper bar 3, so that the impact of water, oil or the other impurities on 3 surface of copper bar in forced draft
Lower disengaging copper bar 3, water, oil or the other impurities of disengaging are discharged from the position that copper bar 3 enters rotation spray air-casing 5, through over cleaning
Copper bar 3 using after vacuum box 4 enter extruding wheel 2 extruding slot 6 in.Lasting low pressure to enter on a small quantity in vacuum box 4
Gas is quickly detached, and the copper bar 3 after cleaning will not be oxidized in vacuum box 4, and 3 surface quality of copper bar is more excellent.2 turns of extruding wheel
The part that extrusion chamber 7 is detached from dynamic process is gone at scraper plate 10,10 pairs of extruding slots of scraper plate during extruding wheel 2 continues to rotate
6 inner wall surface is scraped, and the oxide for being attached to the impurity for squeezing 6 surface of slot and remaining copper or copper is struck off cleaning.
Constantly enter extrusion chamber 7 under frictional force effect of the copper bar 3 of slot 6 between extruding wheel 2 into squeezing, while
Rubbing action issues that thermal change is soft, and temperature can be increased to 625 DEG C, positioned at extrusion chamber 7 close to the copper bar 3 of 8 side of plug soften after
Continue under the pushing of the copper bar 3 of extrusion chamber 7 from squeeze out road squeeze out, and then by extrusion die be extruded into it is homogeneous,
The flawless copper bar in surface.
Embodiment 2, the present embodiment and the difference of embodiment 1 be only that, the air pressure of swirling eddy is 6MPa, in extrusion process
Control extrusion pressure is 50MPa, and extruded velocity 30m/min, extrusion temperature is 130 DEG C, and the environment temperature of vapor crosslinking is 63
DEG C, the time of vapor crosslinking is 3.25h, and the thickness of primary insulation material accounts for the 16% of insulating materials overall thickness, outer layer insulation material
The thickness of material accounts for the 84% of insulating materials overall thickness.
Embodiment 3, the present embodiment and the difference of embodiment 1 be only that, the air pressure of swirling eddy is 9MPa, in extrusion process
Control extrusion pressure is 60MPa, and extruded velocity 40m/min, extrusion temperature is 135 DEG C, and the environment temperature of vapor crosslinking is 65
DEG C, the time of vapor crosslinking is 3.5h, and the thickness of primary insulation material accounts for the 20% of insulating materials overall thickness, outer layer insulation material
Thickness account for the 80% of insulating materials overall thickness.
Claims (10)
1. a kind of manufacturing method of double-layer coextrusion insulated copper bar, it is characterised in that: include the following steps,
A, copper bar is continuously extruded into copper bar by pressurizing unit；
B, the copper bar lopping of extrusion forming is packed；
C, the copper bar of lopping packaging is unfolded, is formed simultaneously inside and outside insulating layer with extruder double-layer coextrusion, inner insulating layer is silane
Cross-linking polyethylene materials, external insulation layer are silane crosslinked halogen-free low-smoke flame-proof polyolefin insulating materials；
D, the copper bar for being extruded into inside and outside insulating layer is subjected to vapor crosslinking；
E, molding copper bar is detected；
F, lopping is put in storage.
2. a kind of manufacturing method of double-layer coextrusion insulated copper bar according to claim 1, it is characterised in that: the step A
Middle copper bar carries out removing surface and the feeding in vacuum environment before entering pressurizing unit, and the air pressure of vacuum environment is 0.05MPa.
3. a kind of manufacturing method of double-layer coextrusion insulated copper bar according to claim 1, it is characterised in that: the step C
It is 40-60MPa that extrusion pressure is controlled in middle extrusion process, and extruded velocity 20-40m/min, extrusion temperature is 125-135 DEG C.
4. a kind of manufacturing method of double-layer coextrusion insulated copper bar according to claim 1, it is characterised in that: the step C
The thickness of middle control primary insulation material accounts for 12%-the 20% of insulating materials overall thickness, and the thickness of outer layer insulation material accounts for insulation
88%-the 80% of material overall thickness.
5. a kind of manufacturing method of double-layer coextrusion insulated copper bar according to claim 1, it is characterised in that: the step D
The environment temperature of middle control vapor crosslinking is 60-65 DEG C, and the time of vapor crosslinking is 3-3.5h.
6. a kind of manufacturing method of double-layer coextrusion insulated copper bar according to claim 1, it is characterised in that: the step A
In pressurizing unit include extruding wheel, the wheel face of extruding wheel, which is equipped with, squeezes slot, press shoe is equipped on the outside of extruding wheel, in press shoe
Equipped with the cambered surface portion that the wheel face with extruding wheel is bonded, the extrusion chamber of arc, extrusion chamber one end are formed between extruding wheel and press shoe
Press shoe on be fixed with plug, the setting of another end opening, extrusion chamber offers extrusion road on the cambered surface portion side wall of plug,
The vacuum box covered on the wheel face of extruding wheel is installed on the outside of extruding cavity open end, the rotation towards copper bar is equipped in vacuum box
Turn jet set, copper bar is inserted into the extruding slot of extruding wheel after passing through vacuum box, rotation spray air-casing in step A.
7. a kind of manufacturing method of double-layer coextrusion insulated copper bar according to claim 6, it is characterised in that: the vacuum box
It is communicated with vacuum pump, gearbox is connected between vacuum pump and extruding wheel, the exhaust end of vacuum pump is connected to rotation spray air-casing, rotation
Turn the annular sleeve that jet set includes the hollow structure being fixed in vacuum box, uniformly divides in a ring on the inner sidewall of rotation spray air-casing
It is furnished with multiple inclined gas vents in the same direction, the inner sidewall of rotation spray air-casing is in cone cylinder shape, and the bigger diameter end of cone cylinder is towards press shoe.
8. a kind of manufacturing method of double-layer coextrusion insulated copper bar according to claim 7, it is characterised in that: in step A
The removing surface is to be sent into rotation spray air-casing with vacuum pump intake-gas, and gas is sprayed from gas vent to copper bar surface and is sprayed
Swirling eddy blows away the water and oil being attached on copper bar, and the air pressure of swirling eddy is 3-9MPa.
9. a kind of manufacturing method of double-layer coextrusion insulated copper bar according to claim 7, it is characterised in that: the vacuum box
Bottom be equipped with insertion squeeze slot in scraper plate, the scraper plate and squeeze slot the tangent setting of slot bottom.
10. a kind of manufacturing method of double-layer coextrusion insulated copper bar according to claim 9, it is characterised in that: copper bar into
Pass through scraper plate before entering to squeeze slot and strikes off attachment to slot inner wall is squeezed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811152113.8A CN109346246B (en) | 2018-09-29 | 2018-09-29 | Manufacturing method of double-layer co-extrusion insulated copper bar |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811152113.8A CN109346246B (en) | 2018-09-29 | 2018-09-29 | Manufacturing method of double-layer co-extrusion insulated copper bar |
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| CN109346246A true CN109346246A (en) | 2019-02-15 |
| CN109346246B CN109346246B (en) | 2019-12-24 |
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| CN107527679A (en) * | 2017-07-07 | 2017-12-29 | 浙江中兴电缆有限公司 | A kind of double-layer coextrusion insulated fire resisting irradiation crosslinking halogen-free low-smoke and flame retardant electric wire and preparation method and co-extruder head |
| CN207695341U (en) * | 2017-12-27 | 2018-08-07 | 浙江同诚合金铜管有限公司 | A kind of pressurizing unit of copper-alloy pipe-material |
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2018
- 2018-09-29 CN CN201811152113.8A patent/CN109346246B/en not_active Expired - Fee Related
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201493338U (en) * | 2009-07-29 | 2010-06-02 | 常州市正和电磁线有限公司 | Copper strap wire squeezing machine |
| CN103377777A (en) * | 2012-04-17 | 2013-10-30 | 上海新益电力线路器材有限公司 | Water removing device for cable surface |
| CN103921071A (en) * | 2014-04-16 | 2014-07-16 | 黄学志 | Oxygen-free copper bar production technology |
| CN105336453A (en) * | 2015-11-24 | 2016-02-17 | 江苏永鼎盛达电缆有限公司 | Double-layer co-extrusion and insulation irradiation crosslinking process method and low-smoke halogen-free flame-retardant wire |
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| Publication number | Publication date |
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| CN109346246B (en) | 2019-12-24 |
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