CN107857591A - A kind of method that pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder - Google Patents

A kind of method that pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder Download PDF

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CN107857591A
CN107857591A CN201711034071.3A CN201711034071A CN107857591A CN 107857591 A CN107857591 A CN 107857591A CN 201711034071 A CN201711034071 A CN 201711034071A CN 107857591 A CN107857591 A CN 107857591A
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nano
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draw runner
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CN107857591B (en
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闵洁
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Datong Xincheng New Material Co Ltd
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Datong Xincheng New Material Co Ltd
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Abstract

The invention belongs to novel charcoal material technical field, there is provided a kind of method that pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder, comprise the following steps：1st, from raw material and matched, it is 65 that raw material, which includes weight ratio,：35~74：26 siccative and binding agent, siccative are including mass ratio：60：40~80：20 aggregate and powder, aggregate select real density >=2.08/cm3, ash content≤0.20%, sulfur content≤0.5%, the pitch coke of fugitive constituent≤0.5%, and powder selects granularity D50For 30 ~ 80nm nano-carbon powder, binding agent is 110 ~ 120 DEG C from softening point, and coking value is >=55%, the modified coal asphalt of ash content≤0.30%, siccative and binding agent in raw material；2nd, grind；3rd, it is granulated extrusion；4th, it is calcined；5th, metal is soaked：After roasting product is preheated, the metallic solution melted is poured into, vacuum equipment is put into and vacuumizes, is come out of the stove after being cooled to room temperature after preheating again.The metal-impregnated carbon draw runner material structure that the present invention prepares is stablized, physicochemical property is strong, can be widely applied to pantograph Material Field.

Description

A kind of method that pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder
Technical field
The invention belongs to novel charcoal material technical field, and in particular to one kind prepares pantograph leaching metal using nano-carbon powder The method of carbon draw runner material.
Background technology
With the development of science and technology, track traffic plays a part of more and more must in national economy.In state of China Today of people's economic level rapid development, track traffic industry especially high ferro, motor-car and passenger-cargo electric locomotive etc. show fluffy Break out the situation of exhibition.The more flourishing country of railway electrification in the world, its contact line conducting wire used are mostly copper or copper alloy Wire, wide selection hard carbon slide plate or dipping plate.Carbon slipper grew up in recent years, commonly used on American-European bullet train Carbon slides analysis high mechanical strength, and the running kilometre number of each slide plate reaches 120,000 kms in German ICE operations.At present, carbon slipper It is still the widely used preferred material of our department of domestic and international iron, carbon slipper is the material based on carbon-graphite, has good lead Electricity, heat conduction and wear-resistant and self-lubrication, and with suppressing spark effect and high temperature deformation, small to contact net lead abrasion well Feature, the selection as the key components carbon draw runner of carbon slipper must have strict requirements index to its combination property, need There is suitable resistivity and contact resistance, enough mechanical strengths, good anti-attrition and self lubricity, good resistance to Hot, resistance to electric arc and certain wearability.Carbon slipper material of the prior art often exists in performance not due to various factors Foot.
The content of the invention
To adapt to the practical development demand of railway electrification, the present invention overcomes the shortcomings of the prior art, solved Technical problem for propose it is a kind of using nano-carbon powder prepare pantograph metal-impregnated carbon draw runner material method, make the leaching produced Metal carbon draw runner material property is excellent, meets the technical requirements of pantograph material.
In order to solve the above-mentioned technical problem, the technical solution adopted by the present invention is：One kind is prepared by electricity using nano-carbon powder Bend the method for metal-impregnated carbon draw runner material, comprise the following steps：
S101, from raw material and being matched, the raw material includes siccative and binding agent, and the siccative includes aggregate and powder, The aggregate selects real density >=2.08/cm3, ash content≤0.20%, sulfur content≤0.5%, the pitch coke of fugitive constituent≤0.5%, institute It is 110 ~ 120 DEG C from softening point that powder, which is stated, from the nano-carbon powder that granularity D50 is 30 ~ 80nm, the binding agent, and coking value is >=55%, the modified coal asphalt of ash content≤0.30%, the weight of siccative and binding agent ratio is 65 in the raw material：35~74：26；Institute Stating the mass ratio of aggregate pitch coke and powder nano-carbon powder in siccative is：60：40~80：20；The particle diameter of pitch coke in the aggregate Quality proportioning is：0.50mm m<Particle diameter≤0.80m mass ratio is 15~20wt%；0.30mm<Particle diameter≤0.50mm quality Than for 20~25wt%；0.10mm<Particle diameter≤0.30mm mass ratio is 15~20wt%；0<Particle diameter<0.10mm mass ratio is 45~50wt%；
S102, grinding：The siccative for matching to obtain in step S101 is ground to obtain powder；
S103, it is granulated extrusion：After powder after grinding is granulated, carries out extrusion forming using the extruder for installing mould and obtain To green compact；
S104, roasting：Green compact are put into roaster to be calcined to obtain roasting product；
S105, leaching metal：Insert in graphite crucible after roasting product is weighed, and preheated by preheating furnace, while will prepare Good copper, which is put into, to be melted in pond, is initially powered up, and electric current is adjusted into 220A, is extremely metallized after being powered 2 hours to meet leaching metal It is required that liquid, then graphite crucible is taken out from preheating furnace, be placed on melt pond under, the metallic solution melted is poured into After in pyrographite crucible equipped with carbon bar, high-temperature crucibles are put into vacuum equipment and vacuumized, when vacuum reaches After 0.085MPa, vacuum terminates, and is placed again into after preheating half an hour to room temperature in preheating furnace and takes out, by cleaning gained after coming out of the stove To product be metal-impregnated carbon draw runner material.
In the step S105, the heating curve of preheating furnace preheating is：Heated up and protected with 250 DEG C/h speed during room temperature ~ 400 DEG C Hold 1.5h；With 500 DEG C/h speed heating 1h at 400 ~ 900 DEG C；With 175 DEG C/h speed heating 2h at 900 ~ 1250 DEG C.
The particle diameter quality proportioning of pitch coke is in the aggregate：0.50mm m<Particle diameter≤0.80m mass ratio is 15wt%； 0.30mm<Particle diameter≤0.30mm mass ratio is 25wt%；0.10mm<Particle diameter≤0.30mm mass ratio is 15wt%；0<Particle diameter <0.10mm mass ratio is 45wt%.
In the step S104, the roasting heating curve is：Heat up and 25 DEG C and protect per hour during room temperature ~ 250 degree Celsius 10h is held, being heated up per hour at 250 ~ 450 DEG C and keeps 25h by 8 DEG C, and at 450 ~ 700 DEG C, heat up 5 DEG C of holding 50h per hour； At 700 ~ 900 DEG C, heat up 5 ~ 6 DEG C of holding 35h per hour, and at 900 ~ 1100 DEG C, heat up 6 DEG C of holding 33h per hour, At 1100 ~ 1200 DEG C, heat up 6 ~ 7 DEG C of holdings 15h, 1200 DEG C of insulation 24h per hour；1200 ~ 300 DEG C of Temperature falls；300~150 It is aeration-cooling below DEG C.
The step S101 also includes the step of broken and screening to aggregate pitch coke.
In the step S103, the temperature of feed cylinder of granulator is set as 140 DEG C of 1st area, 2 160 DEG C of areas, 3 195 DEG C of areas, 4th area 195 DEG C, 5 185 DEG C of areas, 6 180 DEG C of areas, 7 180 DEG C of areas, 8 170 DEG C of areas, temperature fluctuates ± 2 DEG C, engine speed≤12R/ Min, when holding 1 is small after temperature reaches design temperature, start powder to add screw machine, open screw machine and powder is sent to Comminutor storage bin, the blanking velocity of storage bin is adjusted, open comminutor；The design temperature of extruding machine mold barrel is 1 area 180 DEG C, 2 185 DEG C of areas, 3 180 DEG C of areas, 4 185 DEG C of areas, 5 180 DEG C of areas, 6 160 DEG C of areas, 7 155 DEG C of areas, 8 140 DEG C of areas, 9 135 DEG C of areas, temperature Degree fluctuates ± 5 DEG C, and when the temperature of mould barrel rises to design temperature, observation starts charging extrusion molding and given birth to after stablizing Base.
In the siccative, the mass ratio of aggregate pitch coke and powder nano-carbon powder is：73：27~78：22.
The present invention has the advantages that compared with prior art：
1st, the present invention adds nano-carbon powder to ensure carbon material structure compactness in preparing raw material, and it is close to improve material volume Degree, in addition, the raw material of the present invention that prepare are the extensive material in market, cost is low, and preparation technology of the present invention is relatively simple, Beneficial to production in enormous quantities；
2nd, preparation method of the invention improves product mechanical strength, anti-attrition and self lubricity etc. by soaking alloying technology；Adopt The metal-impregnated carbon draw runner material prepared with the preparation method of the present invention, resistance to big power frequency and dash current impact, the resistance to electricity of resistance stabilization Arc；
3rd, the carbon draw runner material structure prepared using the preparation method of the present invention is stable, and physicochemical property is strong, has a safety feature, its carbon Strip material performance is bulk density≤2.0 ~ 3.0g/cm3, rupture strength >=80Mpa, compression strength >=110Mpa, impact flexibility ≥0.30J/cm2, μ Ω m of 20 DEG C of resistivity≤10, Rockwell hardness≤115.
Embodiment
To make technical scheme and advantage clearer, below in conjunction with specific embodiment, to the skill of the present invention Art scheme is clearly and completely described, it is clear that and described embodiment is the part of the embodiment of the present invention, rather than entirely The embodiment in portion；Based on the embodiment in the present invention, those of ordinary skill in the art are not under the premise of creative work is made The every other embodiment obtained, belongs to the scope of protection of the invention.
The embodiments of the invention provide a kind of preparation method of the new pure carbon draw runner material of pantograph, comprise the following steps：
1st, from raw material and matched.
Inventor passes through many experiments, researchs and analyses and is produced as a trial with product, final to determine that siccative is selected in raw material selection Pitch coke is aggregate, nano-carbon powder is powder, and binding agent selects modified coal asphalt, the real density of selected aggregate pitch coke >= 2.08/cm3, ash content≤0.20%, sulfur content≤0.5%, fugitive constituent≤0.5%；The granularity D50 of the powder nano-carbon powder be 30 ~ 80nm, the softening point of the binding agent modified coal asphalt is 110 ~ 120 DEG C, and coking value is >=55%, ash content≤0.30%.Be advantageous to The higher roasting product of bulk density is obtained, is advantageous to improve product qualification rate, the physics and chemistry of its final products refers to and could fully obtained Meet.In addition, in the raw material, the weight ratio of siccative and binding agent is 65:35~74:26；In the siccative, aggregate pitch coke Mass ratio with powder nano-carbon powder is：60：40~80：20；The particle diameter quality proportioning of pitch coke is 0.50mm m in aggregate<Grain Footpath≤0.80m mass ratio is 15~20wt%；0.30mm<Particle diameter≤0.50mm mass ratio is 20~25wt%；0.10mm< Particle diameter≤0.30mm mass ratio is 15~20wt%；0<Particle diameter<0.10mm mass ratio is 45~50wt%.
Preferably, the nano-carbon powder is preferably that granularity D50 is 35 ~ 75nm.
Preferably, in the raw material, the weight ratio of siccative and binding agent is 70:30~72：28.
Preferably, in the siccative, the mass ratio of aggregate pitch coke and powder nano-carbon powder is：70:30~72：28.
Preferably, the particle diameter quality proportioning of pitch coke is 0.50mm m in the aggregate<Particle diameter≤0.80m mass ratio is 15wt%；0.30mm<Particle diameter≤0.30mm mass ratio is 25wt%；0.10mm<Particle diameter≤0.30mm mass ratio is 15wt%； 0<Particle diameter<0.10mm mass ratio is 45wt%, and at this moment, the particles of aggregates of different-grain diameter accumulates more close, the volume of carbon product Density, the porosity, mechanical strength and thermal coefficient of expansion can reach an extraordinary balance, and the volume of prepared graphite product is close Degree is big, the porosity is small, thermal coefficient of expansion is small.
In addition, the preparation method of the embodiment of the present invention, before dispensing, can also include to the broken and screening of aggregate Step, it is elected to after making good use of the pitch coke block needed to use, block is crushed, after being sieved according to its particle diameter, leads to The granularity quality proportioning for crossing above-mentioned pitch coke carries out dispensing.
2nd, grind.
The siccative for matching to obtain in step S101 is ground to obtain powder, grinding requires that purity is 99.99%.
3rd, it is granulated extrusion.
The purpose of this step is that the powder after grinding is carried out into extrusion forming to obtain green compact；It is required that the pellet extruded is point Bulk, pellet must not bond, unite.Therefore, the dosage of binding agent is particularly significant, in the embodiment of the present invention, siccative and binding agent Weight proportion be 66：34~73：27, preferably 70：30~72：28, the green compact that can so cause meet to require.
In this step, the well mixed feed powder by grinding is added in comminutor be granulated first, set comminutor Barrel and die head temperature, 140 DEG C of 1st area of barrel temperature, 2 160 DEG C of areas, 3 195 DEG C of areas, 4 195 DEG C of areas, 5 185 DEG C of areas, 6 180 DEG C of areas, 7 180 DEG C of areas, 8 170 DEG C of areas, temperature fluctuate ± 2 DEG C, engine speed≤12R/min；Protected after design temperature reaches requirement Hold 1 hour, start powder to add screw machine, open screw machine and powder is sent to comminutor storage bin, adjust storage bin Blanking velocity, open comminutor and extrude, cutting knife while opening comminutor by comminutor outlet is opened, adjustment cutting knife speed Degree；The particle of extrusion is dispersed, and particle is put into special barrel.The embodiment of the present invention is using extrusion molding side Formula, the siccative requirement required for extrusion molding is not substantially in bulk, that is, consumption of binder requires, and concurrently sets mould 180 DEG C of 1st area of barrel temperature, 2 185 DEG C of areas, 3 180 DEG C of areas, 4 185 DEG C of areas, 5 180 DEG C of areas, 6 160 DEG C of areas, 7 155 DEG C of areas, 8 areas 140 DEG C, 9 135 DEG C of areas, temperature fluctuates ± 5 DEG C, and when design temperature rises to design temperature, starting charging after observation is stable extrudes, Extrusion molding, the bulk density of the green compact after shaping reach 2.0 ~ 2.5g/cm3。
4th, it is calcined.
The purpose of roasting is to carbonize binder pitch, excludes volatile matter, makes the binding agent coking in product, improves product Electric conductivity, consolidated article shape.In the present invention, the maximum temperature of roasting reaches 1100- ~ 1200 DEG C, and the heating of roasting is bent Line is：In heating zone, room temperature ~ 250 DEG C, heat up 25 DEG C per hour, this stage is that green compact absorb heat to melt in product Pitch, meanwhile, the coal tar pitch in coke hole redistributes because of capillarity, the transfer of part pitch；At 250 ~ 450 DEG C When, heat up 8 DEG C per hour, now, polycondensation reaction enhancing, largely excludes fugitive constituent, coke initially forms, and is advantageous in roasting product The coking rate of binding agent is improved, carbonization at low temperature is changed into coking；At 450 ~ 700 DEG C, heat up 5 DEG C per hour, now polycondensation reaction Continue to occur, the further coking of product, heated up with this heating rate, be advantageous to improve the bulk density of roasting product and strong Degree；At 700 ~ 900 DEG C, heat up 5 ~ 6 DEG C, heated up with very fast heating rate, the institutional framework of roasting product enters one per hour Step densification；At 900 ~ 1000 DEG C, per hour heat up 6 DEG C, to avoid polycondensation reaction during roasting product shrink when produce Raw crackle；At 1100 ~ 1200 DEG C, heat up 6 ~ 7 DEG C per hour, consolidate roasting effect.
In the embodiment of the present invention, the roasting heating curve is：Heat up and 25 DEG C and protect per hour during room temperature ~ 250 degree Celsius 10h is held, being heated up per hour at 250 ~ 450 DEG C and keeps 25h by 8 DEG C, and at 450 ~ 700 DEG C, heat up 5 DEG C of holding 50h per hour； At 700 ~ 900 DEG C, heat up 5 ~ 6 DEG C of holding 35h per hour, and at 900 ~ 1100 DEG C, heat up 6 DEG C of holding 33h per hour, At 1100 ~ 1200 DEG C, heat up 6-7 DEG C of holding 15h, 1200 DEG C of insulation 24h per hour；1200----300 DEG C of Temperature fall； Less than 300----150 DEG C aeration-cooling.The bulk density of roasting product after roasting reaches 1.8 ~ 2.2g/cm3。
5th, metal is soaked.
In the preparation method of the present invention, leaching metal is an important procedure for material production, and leaching metal refers to soak on metal Enter in roasting product.In the embodiment of the present invention, the concrete technology for soaking metal is：Inserted after roasting product is weighed in graphite crucible, and Preheated by preheating furnace, heating curve during preheating in preheating furnace is：Heated up during room temperature ~ 400 DEG C with 250 DEG C/h speed Keep 1.5h；With 500 DEG C/h speed heating 1h at 400 ~ 900 DEG C；With 175 DEG C/h speed heating 2h at 900 ~ 1250 DEG C. While roasting product is preheated, ready copper is put into and melted in pond, is initially powered up, electric current is adjusted to 220A, energization 2 Then graphite crucible is taken out from preheating furnace, is placed on thawing to meet the liquid of leaching metal requirement to metallization after hour Under pond, after the metallic solution melted is poured into the pyrographite crucible equipped with carbon bar, high-temperature crucibles are put into vacuum equipment In, it is ensured that start to vacuumize after errorless, after vacuum reaches 0.085MPa, vacuum terminates, and is placed again into preheating furnace and preheats Taken out after half an hour to room temperature, by the product i.e. metal-impregnated carbon draw runner material obtained by clearing up after coming out of the stove.By soaking metal work Skill, the rate of body weight gain of product is set to reach 33 ~ 35%.
The invention provides a kind of method that pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder, nanometer is utilized Carbon dust is raw material, ensures carbon material structure compactness, improves material volume density, in addition, of the present invention prepare original Material is the extensive material in market, and cost is low, and preparation technology of the present invention is relatively simple, beneficial to production in enormous quantities；The preparation of the present invention Method improves product mechanical strength, anti-attrition and self lubricity etc. by soaking alloying technology；Using the preparation method of the present invention The metal-impregnated carbon draw runner material of preparation, resistance to big power frequency and dash current impact, the resistance to electric arc of resistance stabilization；Using the preparation of the present invention Carbon draw runner material structure prepared by method is stable, and physicochemical property is strong, has a safety feature, its carbon strip material performance be bulk density≤ 2.0-3.0g/cm3, rupture strength >=80Mpa, compression strength >=110Mpa, impact flexibility >=0.30J/cm2, 20 DEG C of resistivity≤ 10 μ Ω m, Rockwell hardness≤115.For mechanical strength and resistivity other materials can be instead of completely in some fields The pure carbon carbon draw runner of pantograph produced.
Embodiments of the invention are explained in detail above, but the present invention is not limited to above-described embodiment, in ability In the those of ordinary skill's possessed knowledge of domain, various changes can also be made on the premise of present inventive concept is not departed from Change.

Claims (8)

  1. A kind of 1. method that pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder, it is characterised in that including following step Suddenly：
    S101, from raw material and being matched, the raw material includes siccative and binding agent, and the siccative includes aggregate and powder, The aggregate selects real density >=2.08/cm3, ash content≤0.20%, sulfur content≤0.5%, the pitch coke of fugitive constituent≤0.5%, institute State powder and select granularity D50For 30 ~ 80nm nano-carbon powder, the binding agent is 110 ~ 120 DEG C from softening point, and coking value is >=55%, the modified coal asphalt of ash content≤0.30%, the weight of siccative and binding agent ratio is 65 in the raw material：35~74：26；Institute Stating the mass ratio of aggregate pitch coke and powder nano-carbon powder in siccative is：60：40~80：20；The particle diameter of pitch coke in the aggregate Quality proportioning is：0.50mm m<Particle diameter≤0.80m mass ratio is 15~20wt%；0.30mm<Particle diameter≤0.50mm quality Than for 20~25wt%；0.10mm<Particle diameter≤0.30mm mass ratio is 15~20wt%；0<Particle diameter<0.10mm mass ratio is 45~50wt%；
    S102, grinding：The siccative for matching to obtain in step S101 is ground to obtain powder；
    S103, it is granulated extrusion：After powder after grinding is granulated, carries out extrusion forming using the extruder for installing mould and obtain To green compact；
    S104, roasting：Green compact are put into roaster to be calcined to obtain roasting product；
    S105, leaching metal：Insert in graphite crucible after roasting product is weighed, and preheated by preheating furnace, while will prepare Good copper, which is put into, to be melted in pond, is initially powered up, and electric current is adjusted into 220A, is extremely metallized after being powered 2 hours to meet leaching metal It is required that liquid, then graphite crucible is taken out from preheating furnace, be placed on melt pond under, the metallic solution melted is poured into After in pyrographite crucible equipped with carbon bar, high-temperature crucibles are put into vacuum equipment and vacuumized, when vacuum reaches After 0.085MPa, vacuum terminates, and is placed again into after preheating half an hour to room temperature in preheating furnace and takes out, by cleaning gained after coming out of the stove To product be metal-impregnated carbon draw runner material.
  2. 2. a kind of method that pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder according to claim 1, its It is characterised by, in the step S105, the heating curve of preheating furnace preheating is：Heated up during room temperature ~ 400 DEG C with 250 DEG C/h speed Keep 1.5h；With 500 DEG C/h speed heating 1h at 400 ~ 900 DEG C；With 175 DEG C/h speed heating 2h at 900 ~ 1250 DEG C.
  3. 3. a kind of method that pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder according to claim 1, its It is characterised by, the particle diameter quality proportioning of pitch coke is in the aggregate：0.50mm m<Particle diameter≤0.80m mass ratio is 15wt%；0.30mm<Particle diameter≤0.30mm mass ratio is 25wt%；0.10mm<Particle diameter≤0.30mm mass ratio is 15wt%； 0<Particle diameter<0.10mm mass ratio is 45wt%.
  4. 4. a kind of method that pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder according to claim 1, its It is characterised by, the weight of siccative and binding agent ratio is 70 in the raw material：30~72：28.
  5. 5. a kind of method that pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder according to claim 1, its It is characterised by, in the step S104, the roasting heating curve is：Heat up and 25 DEG C and protect per hour during room temperature ~ 250 degree Celsius 10h is held, being heated up per hour at 250 ~ 450 DEG C and keeps 25h by 8 DEG C, and at 450 ~ 700 DEG C, heat up 5 DEG C of holding 50h per hour； At 700 ~ 900 DEG C, heat up 5 ~ 6 DEG C of holding 35h per hour, and at 900 ~ 1100 DEG C, heat up 6 DEG C of holding 33h per hour, At 1100 ~ 1200 DEG C, heat up 6 ~ 7 DEG C of holdings 15h, 1200 DEG C of insulation 24h per hour；1200 ~ 300 DEG C of Temperature falls；300~150 It is aeration-cooling below DEG C.
  6. 6. a kind of method that pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder according to claim 1, its It is characterised by, the step S101 is also included to aggregate pitch coke the step of crushing and sieve.
  7. 7. a kind of method that pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder according to claim 1, its It is characterised by, in the step S103, the temperature of feed cylinder of granulator is set as 140 DEG C of 1st area, 2 160 DEG C of areas, 3 195 DEG C of areas, 4th area 195 DEG C, 5 185 DEG C of areas, 6 180 DEG C of areas, 7 180 DEG C of areas, 8 170 DEG C of areas, temperature fluctuates ± 2 DEG C, engine speed≤12R/ Min, when holding 1 is small after temperature reaches design temperature, start powder to add screw machine, open screw machine and powder is sent to Comminutor storage bin, the blanking velocity of storage bin is adjusted, open comminutor；The design temperature of extruding machine mold barrel is 1 area 180 DEG C, 2 185 DEG C of areas, 3 180 DEG C of areas, 4 185 DEG C of areas, 5 180 DEG C of areas, 6 160 DEG C of areas, 7 155 DEG C of areas, 8 140 DEG C of areas, 9 135 DEG C of areas, temperature Degree fluctuates ± 5 DEG C, and when the temperature of mould barrel rises to design temperature, observation starts charging extrusion molding and given birth to after stablizing Base.
  8. 8. a kind of method that pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder according to claim 1, its It is characterised by, in the siccative, the mass ratio of aggregate pitch coke and powder nano-carbon powder is：73：27~78：22.
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CN109020545A (en) * 2018-08-13 2018-12-18 大同新成新材料股份有限公司 A kind of pantograph pan and preparation method thereof
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