CN105551691B - Cable extrusion technology - Google Patents
Cable extrusion technology Download PDFInfo
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- CN105551691B CN105551691B CN201510947450.6A CN201510947450A CN105551691B CN 105551691 B CN105551691 B CN 105551691B CN 201510947450 A CN201510947450 A CN 201510947450A CN 105551691 B CN105551691 B CN 105551691B
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- 238000001125 extrusion Methods 0.000 title claims abstract description 9
- 238000005516 engineering process Methods 0.000 title abstract description 6
- 238000000034 method Methods 0.000 claims abstract description 23
- 229920003023 plastic Polymers 0.000 claims abstract description 10
- 239000004033 plastic Substances 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 230000008569 process Effects 0.000 claims abstract description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 239000010949 copper Substances 0.000 claims abstract description 4
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims abstract description 4
- 229920003020 cross-linked polyethylene Polymers 0.000 claims description 47
- 239000004703 cross-linked polyethylene Substances 0.000 claims description 44
- 239000004698 Polyethylene Substances 0.000 claims description 24
- 229920000573 polyethylene Polymers 0.000 claims description 24
- 239000004020 conductor Substances 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 9
- 230000000694 effects Effects 0.000 claims description 6
- 238000012360 testing method Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 230000004888 barrier function Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 4
- 229920000426 Microplastic Polymers 0.000 claims description 3
- 238000004140 cleaning Methods 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000004513 sizing Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 15
- 230000000704 physical effect Effects 0.000 abstract description 3
- 238000007689 inspection Methods 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 230000000149 penetrating effect Effects 0.000 abstract 1
- 238000010792 warming Methods 0.000 abstract 1
- -1 polyethylene Polymers 0.000 description 17
- 230000008602 contraction Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000035882 stress Effects 0.000 description 4
- TVEXGJYMHHTVKP-UHFFFAOYSA-N 6-oxabicyclo[3.2.1]oct-3-en-7-one Chemical compound C1C2C(=O)OC1C=CC2 TVEXGJYMHHTVKP-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 235000012438 extruded product Nutrition 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- XOJVVFBFDXDTEG-UHFFFAOYSA-N Norphytane Natural products CC(C)CCCC(C)CCCC(C)CCCC(C)C XOJVVFBFDXDTEG-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000036760 body temperature Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 230000008642 heat stress Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002085 persistent effect Effects 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012958 reprocessing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
-
- 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
-
- 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
- H01B13/145—Pretreatment or after-treatment
-
- 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
- H01B13/22—Sheathing; Armouring; Screening; Applying other protective layers
- H01B13/24—Sheathing; Armouring; Screening; Applying other protective layers by extrusion
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a cable extrusion technology, which comprises the following steps: selecting corresponding screw diameters according to cables with different specifications, carrying out warming and preheating after determining machine equipment to be intact, heating various parts of an extruder to corresponding temperatures according to the screw diameters and different materials, detecting the temperatures every two hours, and beginning to charge and start up the machine; placing a filter plate and a wire mesh in front of a machine head, and using a copper mesh and one wire mesh when impurities are excessive; ensuring that the added plastic is clean and dry during charging, starting a main engine, penetrating into a conducting wire core, starting traction, correcting a shifting core according to the trend of a rubber compound, and then measuring the wire diameter for more than six times every 30 minutes by a vernier caliper, and loading a spool for start-up when conforming to a tolerance range of the process; and simultaneously, starting a spark inspection machine, fully cooling an insulating wire core, and frequently adjusting the tension of a pay-off spool. According to the cable extrusion technology, the temperatures of different parts of the extruder are adjusted, so that the hot-shrinkage rate of the cable is reduced; the physical property is improved; and the quality of the cable is ensured.
Description
Technical field
The present invention relates to field of cable technology, more particularly to a kind of cable expressing technique.
Background technology
At present, cable has irreplaceable effect in power system, information transfer and instrument system, and it can be by electric power
Or information is transferred to the other end from one end.Cable is fitted with excellent electric property, good operational safety performance and hot mistake
Carry mechanical property, and installation and operation simple and convenient for maintenance.In recent years, country unprecedentedly payes attention to the quality of electric wire, often
The supervision class inspection of correlation, crosslinking, the qualification rate of power cable with cross-linked polyethylene insulation can be organized every year to generally remain in 75%-
Between 85%, and in underproof sample, thermal contraction experiment is unqualified to be in the great majority, and the performance of thermal contraction has become prolongs after heat
Stretch, the 3rd index being not easily controlled after senile experiment.
Expressing technique in cables manufacturing belongs to special process, and crudy is difficult or can not be obtained by the examination and test of products
Fully checking, once and pinpoint the problems, it is impossible to ensure product quality by the means such as doing over again, reprocessing.Plastic extruder is electricity
One of key equipment on cable production line, the temperature control effect of extruder directly affects the performance and quality of extruded product,
Temperature controlled reliability is whether and its height of temperature control precision becomes the key for determining product quality, temperature control also into
For the important component part of extruded product production technology.Electrical wire and cable plastic insulating barrier and the basic mode of sheath production are to adopt
Single screw extrusion machine is continuously extruded to be carried out.The characteristics of there is continuous extrusion due to extruder, so plastic insulation and sheath
Production process is also what is be carried out continuously.The thermal contraction performance of cable is the polyethylene insulation for characterizing finished cable in heating status
One value of lower insulation retraction ratio, general survey condition setting is in 130 DEG C of heating temperature, one hour time, heating cooling
Cable insulation retraction situation is observed later and calculates its shrinkage factor, the situation for checking its thermal stress to remain and change；Excessive heat
Stress can cause the stress cracking of cross linked insulation crystalline texture, be also possible to cause shelf depreciation unqualified in addition to shrinking；Thermal stress
It is unqualified that residual or release inequality can cause thermal contraction to be tested, and its consequence is likely to result in larger security incident；Thermal contraction heat
Unqualified to also result in all kinds of joints exposed, or loose contact between joint and line, causes various electrifications even safety
Accident.Existing cable extrusion process temperature control it is not good cause the thermal contraction performance of cable unqualified, plasticizing effect
Fruit is not good, and the quality and safety to cable causes huge hidden danger.To solve the above problems, the present invention discloses a kind of reduction cable
Percent thermal shrinkage, improve cable performance, improve cable quality cable expressing technique.
The content of the invention
The present invention provides a kind of cable expressing technique, by the temperature for adjusting extruder different piece, reduces the heat of cable
Shrinkage factor, improves the quality of cable.The present invention is adopted the following technical scheme that：
A kind of cable expressing technique, comprises the following steps：
S1, according to the corresponding screw diameter of Cable choosing of different size；
S2, determine that machinery equipment is intact after, heating preheating is carried out to each several part of extruder, preheating temperature is 90 DEG C.
S3, Jing step S2 heats 30min, two crosslinked polyethylenes of heated extruder（XLPE) the fuselage of insulating exruded machine
One temperature is 140 DEG C -170 DEG C, and the temperature of fuselage two is 150 DEG C -180 DEG C, and the temperature of machine neck is 180 DEG C -190 DEG C, head
Temperature be 160 DEG C -170 DEG C；Polyethylene（PVC）The temperature of the fuselage one of sheathing machine is 140 DEG C -170 DEG C, fuselage two
Temperature is 140 DEG C -170 DEG C, and the temperature of fuselage three is 140 DEG C -190 DEG C, and the temperature of fuselage four is 140 DEG C -190 DEG C, machine neck
Temperature is 150 DEG C -175 DEG C, and the temperature of head is 160 DEG C -190 DEG C, and the temperature of the feeding section of screw rod rises to（160±10）
DEG C, melt zone be（165±10）DEG C, homogenizing zone be（165±15）DEG C, head be（160±15）DEG C, it is once warm every 2h detections
Degree.
S4, reach after the temperature of step S3, stablize 10 minutes, start charging start, screen plate and iron wire are placed with before head
Each one, when impurity is excessive is netted, copper mesh is used instead and wire gauze is each one, to ensure to add plastic cleaning to be dried during charging.
S5, startup main frame, penetrate conductor wire core, start traction, and conductor wire core more than three circles, prevents line on traction wheel
Core marks traction wheel, according to sizing material moving towards correct after core shift, every 30min vernier caliper measurement line footpaths more than 6 times, meet
Disk driving is then gone up in the range of manufacturing tolerance, meanwhile, start spark test machine.
S6, by the promotion or stirring of screw rod, the plastics for plastifying completely are pushed into head；Reach the stream of head, Jing moulds
Annular gap between core and die sleeve, from die sleeve mouth extrusion, extrudes around conductor or core, formed continuous closely knit insulating barrier or
Restrictive coating.
S7, insulated wire cores carry out into tank it is sufficiently cool, in first paragraph tank water temperature be 50-90 DEG C, second segment tank
Water temperature be 60-70 DEG C, to greatest extent reduce insulated wire cores in internal stress.
S8, detection insulation thickness, at least 10min/ time.
Due to the screw rod point feed zone of extruding machine, plasticizing, melt zone, screw rod model press screw diameter divide 45mm, 65mm,
75mm, 80mm, 90mm, 120mm, 150mm, 200mm, extruder temperature by the effects of process parameters of plastic pellet, is exemplified below again
Go out each several part heating-up temperature of 4 kinds of model screw rods extruder in above-mentioned expressing technique：
When screw diameter in the extruder is 45mm, two polyethylene of heated extruder（PVC）Sheathing machine
The temperature of fuselage one be 150 DEG C -170 DEG C, the temperature of fuselage two, fuselage three and fuselage four is 150 DEG C -170 DEG C, the temperature of machine neck
Spend for 150 DEG C -170 DEG C, the temperature of head is 160 DEG C -170 DEG C；Crosslinked polyethylene（XLPE) the fuselage one of insulating exruded machine
Temperature is 150 DEG C -170 DEG C, and the temperature of fuselage two is 160 DEG C -180 DEG C, and the temperature of machine neck is 180 DEG C -190 DEG C, the temperature of head
Spend for 160 DEG C -170 DEG C；
When screw diameter in the extruder is 65mm, two polyethylene of heated extruder（PVC）Sheathing machine
The temperature of fuselage one be 150 DEG C -170 DEG C, the temperature of fuselage two is 150 DEG C -170 DEG C, and the temperature of fuselage three and fuselage four is
150 DEG C -175 DEG C, the temperature of machine neck is 150 DEG C -170 DEG C, and the temperature of head is 160 DEG C -170 DEG C, and the temperature of die sleeve mouth is 160
℃-180℃；Crosslinked polyethylene（XLPE) temperature of the fuselage one of insulating exruded machine is 150 DEG C -170 DEG C, and the temperature of fuselage two is
160 DEG C -180 DEG C, the temperature of fuselage three is 170 DEG C -190 DEG C, and the temperature of machine neck is 180 DEG C -190 DEG C, and the temperature of head is 190
DEG C -200 DEG C, the temperature of die sleeve mouth is 210 DEG C -220 DEG C；
When screw diameter in the extruder is 90mm, two polyethylene of heated extruder（PVC）Sheathing machine
The temperature of fuselage one be 140 DEG C -160 DEG C, the temperature of fuselage two is 140 DEG C -160 DEG C, and the temperature of fuselage three is 140 DEG C -165
DEG C, the temperature of fuselage four is 140 DEG C -170 DEG C, and the temperature of machine neck is 150 DEG C -170 DEG C, and the temperature of head is 160 DEG C -170 DEG C,
The temperature of die sleeve mouth is 160 DEG C -180 DEG C；Crosslinked polyethylene（XLPE) temperature of the fuselage one of insulating exruded machine is 150 DEG C -170
DEG C, the temperature of fuselage two is 160 DEG C -180 DEG C, and the temperature of fuselage three is 170 DEG C -190 DEG C, the temperature of fuselage four is 180 DEG C -
190 DEG C, the temperature of machine neck is 180 DEG C -190 DEG C, and the temperature of head is 190 DEG C -200 DEG C, and the temperature of die sleeve mouth is 210 DEG C -220
℃；
When screw diameter in the extruder is 150mm, two polyethylene of heated extruder（PVC）Sheathing machine
The temperature of fuselage one be 140 DEG C -160 DEG C, the temperature of fuselage two is 140 DEG C -160 DEG C, and the temperature of fuselage three is 140 DEG C -165
DEG C, the temperature of fuselage four is 140 DEG C -170 DEG C, and the temperature of machine neck is 150 DEG C -170 DEG C, and the temperature of head is 160 DEG C -170 DEG C,
The temperature of die sleeve mouth is 160 DEG C -180 DEG C；Crosslinked polyethylene（XLPE) temperature of the fuselage one of insulating exruded machine is 150 DEG C -170
DEG C, the temperature of fuselage two is 160 DEG C -180 DEG C, and the temperature of fuselage three is 170 DEG C -190 DEG C, the temperature of fuselage four is 180 DEG C -
190 DEG C, the temperature of machine neck is 180 DEG C -190 DEG C, and the temperature of head is 190 DEG C -200 DEG C, and the temperature of die sleeve mouth is 210 DEG C -220
℃。
Beneficial effects of the present invention are：The expressing technique of cable of the present invention is used, mass-heat can have been produced
The crosslinked cable that contraction has been tested.Wherein：
1. the temperature inside fuselage and head that the present invention passes through control extruder, make the temperature difference of extruder part ±
In the range of 10 DEG C, the percent thermal shrinkage of cable is reduce further, improve the physical property of cable, and then improve cable
Quality and safety.
2. a temperature is detected every 2h, prevent body temperature from reducing or too high, cause product surface coarse, it is unglazed
Pool.
3. temperature of the cooling water in first paragraph tank is more than 50 degree, should with the heat reduced to greatest extent inside cable
Power, while preventing the generation of impression and cable from abrading with tank, affects the quality of cable.
Description of the drawings
The preferred embodiment for the present invention is carried out below in conjunction with the accompanying drawings describing in detail or preferably, wherein,
A kind of schematic diagram of the extruder of cable expressing technique that Fig. 1 is provided for the present invention；
A kind of schematic diagram of the insulating exruded machine of cable expressing technique that Fig. 2 is provided for the present invention；
A kind of schematic diagram of the sheathing machine of cable expressing technique that Fig. 3 is provided for the present invention.
Specific embodiment
Below with reference to the accompanying drawings 1 to accompanying drawing 3 is further described by embodiment to the present invention：
A kind of cable expressing technique, comprises the following steps：
S1, according to the corresponding screw diameter of Cable choosing of different size.
S2, determine that machinery equipment is intact after, heating preheating is carried out to each several part of extruder, preheating temperature is 90 DEG C.
S3, Jing step S2 heats 30min, two crosslinked polyethylenes of heated extruder（XLPE) the machine of insulating exruded machine 7
The temperature of body 1 is 140 DEG C -170 DEG C, and the temperature of fuselage 22 is 150 DEG C -180 DEG C, and the temperature of machine neck 5 is 180 DEG C -190 DEG C,
The temperature of head 6 is 160 DEG C -170 DEG C；Polyethylene（PVC）The temperature of the fuselage 1 of sheathing machine 8 is 140 DEG C -170 DEG C,
The temperature of fuselage 2 12 is 140 DEG C -170 DEG C, and the temperature of fuselage 3 13 is 140 DEG C -190 DEG C, and the temperature of fuselage 4 14 is 140
DEG C -190 DEG C, the temperature of machine neck 15 is 150 DEG C -175 DEG C, and the temperature of head 16 is 160 DEG C -190 DEG C, the temperature of the feeding section of screw rod
Degree rises to（160±10）DEG C, melt zone be（165±10）DEG C, homogenizing zone be（165±15）DEG C, head 6 be（160±15）
DEG C, detect a temperature every 2h.
S4, reach after the temperature of step S3, stablize 10 minutes, start charging start, screen plate and iron wire are placed with before head
Each one, when impurity is excessive is netted, copper mesh is used instead and wire gauze is each one, to ensure to add plastic cleaning to be dried during charging.
S5, startup main frame, penetrate conductor wire core, start traction, and conductor wire core more than three circles, prevents line on traction wheel
Core marks traction wheel, according to sizing material moving towards correct after core shift, every 30min vernier caliper measurement line footpaths more than 6 times, meet
Disk driving is then gone up in the range of manufacturing tolerance, meanwhile, start spark test machine.
S6, by the promotion or stirring of screw rod, the plastics for plastifying completely are pushed into head；Reach the stream of head, Jing moulds
Annular gap between core and die sleeve, from die sleeve mouth extrusion, extrudes around conductor or core, formed continuous closely knit insulating barrier or
Restrictive coating.
S7, insulated wire cores carry out into tank it is sufficiently cool, in first paragraph tank water temperature be 50-90 DEG C, second segment tank
Water temperature be 60-70 DEG C, to greatest extent reduce insulated wire cores in internal stress.
S8, detection insulation thickness, at least 10min/ time.
Due to the screw rod point feed zone of extruding machine, plasticizing, melt zone, screw rod model press screw diameter divide 45mm, 65mm,
75mm, 80mm, 90mm, 120mm, 150mm, 200mm, extruder temperature by the effects of process parameters of plastic pellet, is exemplified below again
Go out each several part heating-up temperature of 4 kinds of model screw rods extruder in above-mentioned expressing technique：
Wherein, in following examples heat extend result of the test be（220±5）DEG C, duration of load application be 25min, machine
Tool stress is 30N/cm3Under conditions of carry out, the result of the test of percent thermal shrinkage be（150±5）DEG C, the condition of persistent period 8h
Under carry out.
Embodiment one
Screw diameter in the extruder is 45mm, according to the temperature setting situation of extruder each several part, enumerates following
Three kinds of embodiments：
Two polyethylene of heated extruder（PVC）The temperature of the fuselage 1 of sheathing machine 8 is 150 DEG C, fuselage two
12 temperature is 150 DEG C, and the temperature of machine neck 15 is 150 DEG C, and the temperature of head 16 is 160 DEG C；Crosslinked polyethylene（XLPE) insulate
The temperature of the fuselage 1 of extruder 7 is 150 DEG C, and the temperature of fuselage 22 is 160 DEG C, and the temperature of machine neck 5 is 180 DEG C, head 6
Temperature is 160 DEG C, and it is 0 that the cable produced percentage elongation under a load is the percentage elongation after 60%, cooling, and percent thermal shrinkage is
2.6%, tensile strength is 8.4MPa, and elongation at break is 420%.
Two polyethylene of heated extruder（PVC）The temperature of the fuselage 1 of sheathing machine 8 is 170 DEG C, fuselage two
12 temperature is 170 DEG C, and the temperature of machine neck 15 is 170 DEG C, and the temperature of head 16 is 170 DEG C；Crosslinked polyethylene（XLPE) insulate
The temperature of the fuselage 1 of extruder 7 is 170 DEG C, and the temperature of fuselage 22 is 180 DEG C, and the temperature of machine neck 5 is 190 DEG C, head 6
Temperature is 170 DEG C, and it is 0 that the cable produced percentage elongation under a load is the percentage elongation after 65%, cooling, and percent thermal shrinkage is
2.2%, tensile strength is 8.5MPa, and elongation at break is 420%.
Two polyethylene of heated extruder（PVC）The temperature of the fuselage 1 of sheathing machine 8 is 165 DEG C, fuselage two
12 temperature is 160 DEG C, and the temperature of machine neck 15 is 160 DEG C, and the temperature of head 16 is 165 DEG C；Crosslinked polyethylene（XLPE) insulate
The temperature of the fuselage 1 of extruder 7 is 160 DEG C, and the temperature of fuselage 22 is 175 DEG C, and the temperature of machine neck 5 is 185 DEG C, head 6
Temperature is 165 DEG C, and it is 0 that the cable produced percentage elongation under a load is the percentage elongation after 65%, cooling, and percent thermal shrinkage is
1.6%, tensile strength is 8.7MPa, and elongation at break is 430%.
Embodiment two
Screw diameter in the extruder is 65mm, according to the temperature setting situation of extruder each several part, enumerates following
Three kinds of embodiments：
Two polyethylene of heated extruder（PVC）The temperature of the fuselage 1 of sheathing machine 8 is 150 DEG C, fuselage two
12 temperature is 150 DEG C, and the temperature of fuselage 3 13 is 150 DEG C, and the temperature of machine neck 15 is 150 DEG C, and the temperature of head 16 is 160
DEG C, the temperature of die sleeve mouth is 160 DEG C；Crosslinked polyethylene（XLPE) temperature of the fuselage 1 of insulating exruded machine 7 is 150 DEG C, fuselage
22 temperature is 160 DEG C, and the temperature of fuselage 33 is 170 DEG C, and the temperature of machine neck 5 is 180 DEG C, and the temperature of head 6 is 190 DEG C,
The temperature of die sleeve mouth is 210 DEG C, and it is 0 that the cable produced percentage elongation under a load is the percentage elongation after 60%, cooling, and heat is received
Shrinkage is 3%, and tensile strength is 8.5MPa, and elongation at break is 420%.
Two polyethylene of heated extruder（PVC）The temperature of the fuselage 1 of sheathing machine 8 is 170 DEG C, fuselage two
12 temperature is 170 DEG C, and the temperature of fuselage 3 13 is 175 DEG C, and the temperature of machine neck 15 is 170 DEG C, and the temperature of head 16 is 170
DEG C, the temperature of die sleeve mouth is 180 DEG C；Crosslinked polyethylene（XLPE) temperature of the fuselage 1 of insulating exruded machine 7 is 170 DEG C, fuselage
22 temperature is 180 DEG C, and the temperature of fuselage 33 is 190 DEG C, and the temperature of machine neck 5 is 190 DEG C, and the temperature of head 6 is 200 DEG C,
The temperature of die sleeve mouth is 220 DEG C, and it is 0 that the cable produced percentage elongation under a load is the percentage elongation after 65%, cooling, and heat is received
Shrinkage is 2.4%, and tensile strength is 8.6MPa, and elongation at break is 430%.
Two polyethylene of heated extruder（PVC）The temperature of the fuselage 1 of sheathing machine 8 is 160 DEG C, fuselage two
12 temperature is 160 DEG C, and the temperature of fuselage 3 13 is 165 DEG C, and the temperature of machine neck 15 is 160 DEG C, and the temperature of head 16 is 165
DEG C, the temperature of die sleeve mouth is 170 DEG C；Crosslinked polyethylene（XLPE) temperature of the fuselage 1 of insulating exruded machine 7 is 160 DEG C, fuselage
22 temperature is 170 DEG C, and the temperature of fuselage 33 is 180 DEG C, and the temperature of machine neck 5 is 185 DEG C, and the temperature of head 6 is 195 DEG C,
The temperature of die sleeve mouth is 215 DEG C, and it is 0 that the cable produced percentage elongation under a load is the percentage elongation after 55%, cooling, and heat is received
Shrinkage is 1.4%, and tensile strength is 8.7MPa, and elongation at break is 420%.
Embodiment three
Screw diameter in the extruder is 90mm, according to the temperature setting situation of extruder each several part, enumerates following
Three kinds of embodiments：
Two polyethylene of heated extruder（PVC）The temperature of the fuselage 1 of sheathing machine 8 is 140 DEG C, fuselage two
12 temperature is 140 DEG C, and the temperature of fuselage 3 13 is 140 DEG C, and the temperature of fuselage 4 14 is 140 DEG C, and the temperature of machine neck 15 is 150
DEG C, the temperature of head 16 is 160 DEG C, and the temperature of die sleeve mouth is 160 DEG C；Crosslinked polyethylene（XLPE) the fuselage of insulating exruded machine 7
One 1 temperature is 150 DEG C, and the temperature of fuselage 22 is 160 DEG C, and the temperature of fuselage 33 is 170 DEG C, and the temperature of fuselage 44 is 180
DEG C, the temperature of machine neck 5 is 180 DEG C, and the temperature of head 6 is 190 DEG C, and the temperature of die sleeve mouth is 210 DEG C, and the cable produced is negative
Carry lower percentage elongation be percentage elongation after 60%, cooling be 0, percent thermal shrinkage is 3.1%, and tensile strength is 8.3MPa, extension at break
Rate is 410%.
Two polyethylene of heated extruder（PVC）The temperature of the fuselage 1 of sheathing machine 8 is 160 DEG C, fuselage two
12 temperature is 160 DEG C, and the temperature of fuselage 3 13 is 165 DEG C, and the temperature of fuselage 4 14 is 170 DEG C, and the temperature of machine neck 15 is 170
DEG C, the temperature of head 16 is 170 DEG C, and the temperature of die sleeve mouth is 180 DEG C；Crosslinked polyethylene（XLPE) the fuselage of insulating exruded machine 7
One 1 temperature is 170 DEG C, and the temperature of fuselage 22 is 180 DEG C, and the temperature of fuselage 33 is 190 DEG C, and the temperature of fuselage 44 is 190
DEG C, the temperature of machine neck 5 is 190 DEG C, and the temperature of head 6 is 200 DEG C, and the temperature of die sleeve mouth is 220 DEG C, and the cable produced is negative
Carry lower percentage elongation be percentage elongation after 55%, cooling be 0, percent thermal shrinkage is 1.6%, and tensile strength is 8.6MPa, extension at break
Rate is 430%.
Two polyethylene of heated extruder（PVC）The temperature of the fuselage 1 of sheathing machine 8 is 150 DEG C, fuselage two
12 temperature is 150 DEG C, and the temperature of fuselage 3 13 is 155 DEG C, and the temperature of fuselage 4 14 is 160 DEG C, and the temperature of machine neck 15 is
1550 DEG C, the temperature of head 16 is 165 DEG C, and the temperature of die sleeve mouth is 170 DEG C；Crosslinked polyethylene（XLPE) insulating exruded machine 7
The temperature of fuselage 1 is 160 DEG C, and the temperature of fuselage 22 is 170 DEG C, and the temperature of fuselage 33 is 180 DEG C, the temperature of fuselage 44
For 185 DEG C, the temperature of machine neck 5 is 185 DEG C, and the temperature of head 6 is 195 DEG C, and the temperature of die sleeve mouth is 215 DEG C, the electricity produced
It is 0 that cable percentage elongation under a load is the percentage elongation after 65%, cooling, and percent thermal shrinkage is 2%, and tensile strength is 8.8MPa, fracture
Percentage elongation is 420%.
Example IV
Screw diameter in the extruder is 150mm, according to the temperature setting situation of extruder each several part, enumerates following
Three kinds of embodiments：
Two polyethylene of heated extruder（PVC）The temperature of the fuselage 1 of sheathing machine 8 is 140 DEG C, fuselage two
12 temperature is 140 DEG C, and the temperature of fuselage 3 13 is 140 DEG C, and the temperature of fuselage 4 14 is 140 DEG C, and the temperature of machine neck 15 is 150
DEG C, the temperature of head 16 is 160 DEG C, and the temperature of die sleeve mouth is 160 DEG C；Crosslinked polyethylene（XLPE) the fuselage one of insulating exruded machine
1 temperature is 150 DEG C, and the temperature of fuselage 22 is 160 DEG C, and the temperature of fuselage 33 is 170 DEG C, and the temperature of fuselage 44 is 180
DEG C, the temperature of machine neck 5 is 180 DEG C, and the temperature of head 6 is 190 DEG C, and the temperature of die sleeve mouth is 210 DEG C, and the cable produced is negative
Carry lower percentage elongation be percentage elongation after 70%, cooling be 0, percent thermal shrinkage is 3%, and tensile strength is 8.2MPa, elongation at break
For 420%.
Two polyethylene of heated extruder（PVC）The temperature of the fuselage 1 of sheathing machine 7 is 160 DEG C, fuselage two
12 temperature is 160 DEG C, and the temperature of fuselage 3 13 is 165 DEG C, and the temperature of fuselage 4 14 is 170 DEG C, and the temperature of machine neck 15 is 170
DEG C, the temperature of head 16 is 170 DEG C, and the temperature of die sleeve mouth is 180 DEG C；Crosslinked polyethylene（XLPE) the fuselage one of insulating exruded machine
1 temperature is 170 DEG C, and the temperature of fuselage 22 is 180 DEG C, and the temperature of fuselage 33 is 190 DEG C, and the temperature of fuselage 44 is 190
DEG C, the temperature of machine neck 5 is 190 DEG C, and the temperature of head 6 is 200 DEG C, and the temperature of die sleeve mouth is 220 DEG C, and the cable produced is negative
Carry lower percentage elongation be percentage elongation after 65%, cooling be 0, percent thermal shrinkage is 2.8%, and tensile strength is 8.4MPa, extension at break
Rate is 410%.
Two polyethylene of heated extruder（PVC）The temperature of the fuselage 1 of sheathing machine 8 is 150 DEG C, fuselage two
12 temperature is 150 DEG C, and the temperature of fuselage 3 13 is 155 DEG C, and the temperature of fuselage 4 14 is 155 DEG C, and the temperature of machine neck 15 is 160
DEG C, the temperature of head 16 is 165 DEG C, and the temperature of die sleeve mouth is 170 DEG C；Crosslinked polyethylene（XLPE) the fuselage of insulating exruded machine 7
One 1 temperature is 160 DEG C, and the temperature of fuselage 22 is 170 DEG C, and the temperature of fuselage 33 is 180 DEG C, and the temperature of fuselage 44 is 185
DEG C, the temperature of machine neck 5 is 185 DEG C, and the temperature of head 6 is 195 DEG C, and the temperature of die sleeve mouth is 215 DEG C, and the cable produced is negative
Carry lower percentage elongation be percentage elongation after 60%, cooling be 0, percent thermal shrinkage is 1.5%, and tensile strength is 8.8MPa, extension at break
Rate is 420%.
To sum up embodiment, draws following conductor wire core physical property contrast table：
Table 1.
| Percentage elongation/% under load | Percentage elongation/% after cooling | Percent thermal shrinkage/% |
| 55-70 | 0 | 1.4-3.1 |
Table 2
| Standard is required | The performance of finished product core | |
| Pristine tensile strength/MPa | ≧5 | 8.1-8.8 |
| Original broken percentage elongation/% | ≧200 | 410-430 |
Finally it should be noted that：The preferred embodiments of the present invention are the foregoing is only, the present invention is not limited to,
Although being described in detail to the present invention with reference to the foregoing embodiments, for a person skilled in the art, it still may be used
To modify to the technical scheme described in foregoing embodiments, or equivalent is carried out to which part technical characteristic,
All any modification, equivalent substitution and improvements within the spirit and principles in the present invention, made etc., should be included in the present invention's
Within protection domain.
Claims (2)
1. a kind of cable expressing technique, it is characterised in that comprise the following steps：
S1, according to the corresponding screw diameter of Cable choosing of different size；
S2, determine that machinery equipment is intact after, heating preheating is carried out to each several part of extruder, preheating temperature is 90 DEG C；
S3, Jing step S2 preheats 30min, two crosslinked polyethylenes of heated extruder（XLPE) insulating exruded machine（7）So as to machine
Body one（1）Temperature be 140 DEG C -170 DEG C, fuselage two（2）Temperature be 150 DEG C -180 DEG C, fuselage three（3）Temperature be 140
DEG C -190 DEG C, fuselage four（4）Temperature be 140 DEG C -190 DEG C, machine neck（5）Temperature be 180 DEG C -190 DEG C, head（6）Temperature
Spend for 160 DEG C -170 DEG C；Polyethylene（PVC）Sheathing machine（8）Fuselage one（11）Temperature be 140 DEG C -170 DEG C, fuselage
Two（12）Temperature be 140 DEG C -170 DEG C, fuselage three（13）Temperature be 140 DEG C -190 DEG C, fuselage four（14）Temperature be 140
DEG C -190 DEG C, machine neck（15）Temperature be 150 DEG C -175 DEG C, head（16）Temperature be 160 DEG C -190 DEG C, the feeding section of screw rod
Temperature rise to（160±10）DEG C, melt zone be（165±10）DEG C, homogenizing zone be（165±15）DEG C, head（6）For（160
±15）DEG C, detect a temperature every 2h；
S4, reach after the temperature of step S3, stablize 10 minutes, start to two insulating exruded machines（7）With sheathing machine（8）'s
Charging start, is placed with screen plate and wire gauze is each one in barrel before head, when impurity is excessive, uses copper mesh instead and wire gauze is each
One, to ensure to add plastic cleaning to be dried during charging；
S5, startup main frame, penetrate conductor wire core, start traction, and conductor wire core more than three circles, prevents core from drawing on traction wheel
Go out traction wheel, according to sizing material moving towards correct after core shift, every 30min vernier caliper measurement line footpaths more than 6 times, meet technique
Disk driving is then gone up in the margin of tolerance, meanwhile, start spark test machine；
S6, by insulating exruded machine（7）With sheathing machine（8）The promotion or stirring of interior screw rod, by the plastics for plastifying completely
Push head（6）And head（16）；The stream of head is reached, the annular gap between Jing core rods and die sleeve, from die sleeve mouth extrusion, is squeezed
It is wrapped in around conductor or core, forms continuous closely knit insulating barrier and restrictive coating；
S7, insulated wire cores carry out into tank it is sufficiently cool, in first paragraph tank water temperature be 50-90 DEG C, the water of second segment tank
Temperature is 60-70 DEG C, and the internal stress in insulated wire cores is reduced to greatest extent；
S8, detection insulation thickness, at least 10min/ time.
2. a kind of cable expressing technique according to claim 1, it is characterised in that due to the screw rod point charging of extruding machine
Section, plasticizing, melt zone, screw rod model press screw diameter divide 45mm, 65mm, 75mm, 80mm, 90mm, 120mm, 150mm,
200mm, extruder temperature by the effects of process parameters of plastic pellet, is exemplified below out 4 kinds of model screw rods in above-mentioned expressing technique again
The each several part heating-up temperature of middle extruder：
When screw diameter in the extruder is 45mm, polyethylene（PVC）Sheathing machine（8）Fuselage one（11）Temperature
For 150 DEG C -170 DEG C, fuselage two（12）, fuselage three（13）With fuselage four（14）Temperature be 150 DEG C -170 DEG C, machine neck（15）
Temperature be 150 DEG C -170 DEG C, head（16）Temperature be 160 DEG C -170 DEG C；Crosslinked polyethylene（XLPE) insulating exruded machine（7）
Fuselage one（1）Temperature be 150 DEG C -170 DEG C, fuselage two（2）, fuselage three（3）With fuselage four（4）Temperature be 160 DEG C-
180 DEG C, machine neck（5）Temperature be 180 DEG C -190 DEG C, head（6）Temperature be 160 DEG C -170 DEG C；
When screw diameter in the extruder is 65mm, polyethylene（PVC）Sheathing machine（8）Fuselage one（11）Temperature
For 150 DEG C -170 DEG C, fuselage two（12）Temperature be 150 DEG C -170 DEG C, fuselage three（13）With fuselage four（14）Temperature be 150
DEG C -175 DEG C, machine neck（15）Temperature be 150 DEG C -170 DEG C, head（16）Temperature be 160 DEG C -170 DEG C, the temperature of die sleeve mouth
For 160 DEG C -180 DEG C；Crosslinked polyethylene（XLPE) insulating exruded machine（7）Fuselage one（1）Temperature be 150 DEG C -170 DEG C, machine
Body two（2）Temperature be 160 DEG C -180 DEG C, fuselage three（3）With fuselage four（4）Temperature be 170 DEG C -190 DEG C, machine neck（5）'s
Temperature is 180 DEG C -190 DEG C, head（6）Temperature be 190 DEG C -200 DEG C, the temperature of die sleeve mouth is 210 DEG C -220 DEG C；
When screw diameter in the extruder is 90mm, polyethylene（PVC）Sheathing machine（8）Fuselage one（11）Temperature
For 140 DEG C -160 DEG C, fuselage two（12）Temperature be 140 DEG C -160 DEG C, fuselage three（13）Temperature be 140 DEG C -165 DEG C, machine
Body four（14）Temperature be 140 DEG C -170 DEG C, machine neck（15）Temperature be 150 DEG C -170 DEG C, head（16）Temperature be 160
DEG C -170 DEG C, the temperature of die sleeve mouth is 160 DEG C -180 DEG C；Crosslinked polyethylene（XLPE) insulating exruded machine（7）Fuselage one（1）'s
Temperature is 150 DEG C -170 DEG C, fuselage two（2）Temperature be 160 DEG C -180 DEG C, fuselage three（3）Temperature be 170 DEG C -190 DEG C,
Fuselage four（4）Temperature be 180 DEG C -190 DEG C, machine neck（5）Temperature be 180 DEG C -190 DEG C, head（6）Temperature be 190 DEG C-
200 DEG C, the temperature of die sleeve mouth is 210 DEG C -220 DEG C；
When screw diameter in the extruder is 150mm, polyethylene（PVC）Sheathing machine（8）Fuselage one（11）Temperature
Spend for 140 DEG C -160 DEG C, fuselage two（12）Temperature be 140 DEG C -160 DEG C, fuselage three（13）Temperature be 140 DEG C -165 DEG C,
Fuselage four（14）Temperature be 140 DEG C -170 DEG C, machine neck（15）Temperature be 150 DEG C -170 DEG C, head（16）Temperature be 160
DEG C -170 DEG C, the temperature of die sleeve mouth is 160 DEG C -180 DEG C；Crosslinked polyethylene（XLPE) insulating exruded machine（7）Fuselage one（1）'s
Temperature is 150 DEG C -170 DEG C, and the temperature of fuselage two (2) is 160 DEG C -180 DEG C, and the temperature of fuselage three (3) is 170 DEG C -190 DEG C,
The temperature of fuselage four (4) is 180 DEG C -190 DEG C, and the temperature of machine neck (5) is 180 DEG C -190 DEG C, the temperature of head (6) is 190 DEG C -
200 DEG C, the temperature of die sleeve mouth is 210 DEG C -220 DEG C.
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Denomination of invention: A cable extrusion process Effective date of registration: 20231211 Granted publication date: 20170503 Pledgee: Zhejiang Tailong Commercial Bank Co.,Ltd. Jiaxing Tongxiang Branch Pledgor: ZHEJIANG WUFENG CABLE CO.,LTD. Registration number: Y2023980070403 |