CN107857591B - A method of pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder - Google Patents

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

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

The invention belongs to novel charcoal material technical fields, provide a kind of method using nano-carbon powder preparation pantograph metal-impregnated carbon draw runner material, the following steps are included: 1, select and raw material and matched, raw material includes the siccative and binder that weight ratio is 65:35 ~ 74:26, and siccative includes mass ratio are as follows: the aggregate and powder of 60:40 ~ 80:20, aggregate select real density >=2.08/cm3, ash content≤0.20%, sulfur content≤0.5%, the pitch coke of fugitive constituent≤0.5%, powder select granularity D50For the nano-carbon powder of 30 ~ 80nm, it is 110 ~ 120 DEG C that binder, which selects softening point, and coking value is >=55%, the modified coal asphalt of ash content≤0.30%, siccative and binder in raw material；2, it grinds；3, it is granulated and squeezes out；4, it roasts；5, it soaks metal: after roasting product is preheated, pouring into melted metallic solution, be put into vacuum equipment and vacuumize, 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 stable, physicochemical property is strong, can be widely applied to pantograph Material Field.

Description

A method of pantograph metal-impregnated carbon draw runner material is prepared using nano-carbon powder
Technical field
The invention belongs to novel charcoal material technical fields, and in particular to a kind of to soak metal using nano-carbon powder preparation pantograph The method of carbon draw runner material.
Background technique
With the development of science and technology, rail traffic plays a part of more and more must in national economy.In state, China Today of people's economic level rapid development, rail traffic industry especially high-speed rail, motor-car and passenger-cargo electric locomotive etc. shows fluffy It breaks out the situation of exhibition.The more developed country of railway electrification in the world, the contact line conducting wire used are mostly copper or copper alloy Conducting wire, wide selection hard carbon slide plate or dipping plate.Carbon slipper has been developed in recent years, commonly used on American-European bullet train The sliding analysis high mechanical strength of carbon, the running kilometre number of each slide plate reaches 120,000 kms in German ICE operation.Currently, carbon slipper It is still the preferred material that domestic and international railway department is widely used, carbon slipper is that have good lead with carbon-graphite for basic material Electric, thermally conductive and wear-resistant and self-lubrication, and have and inhibit spark effect and high temperature deformation, small to contact net lead abrasion well Feature, the selection of the key components carbon draw runner as carbon slipper must have strict requirements index to its comprehensive performance, need There is suitable resistivity and contact resistance, enough mechanical strengths, good anti-attrition and self-lubrication, good resistance to Hot, resistance to electric arc and certain wearability.Carbon slipper material in the prior art often exists in performance not due to various factors Foot.
Summary of the invention
For the practical development demand for adapting to railway electrification, the present invention overcomes the shortcomings of the prior art, to be solved The technical issues of 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 are as follows: a kind of to be prepared using nano-carbon powder by electricity Bend the method for metal-impregnated carbon draw runner material, comprising the following steps:
S101, it selects raw material and is matched, the raw material includes siccative and binder, and the siccative includes aggregate and powder Material, the aggregate select real density >=2.08/cm3, ash content≤0.20%, sulfur content≤0.5%, the pitch of fugitive constituent≤0.5% Coke, it is the nano-carbon powder of 30 ~ 80nm that the powder, which selects granularity D50, and it is 110 ~ 120 DEG C that the binder, which selects softening point, knot Coke number is >=55%, the modified coal asphalt of ash content≤0.30%, and the weight ratio of siccative and binder is 65:35 ~ 74 in the raw material: 26；The mass ratio of aggregate pitch coke and powder nano-carbon powder in the siccative are as follows: 60:40 ~ 80:20；Pitch coke in the aggregate Partial size quality proportioning are as follows: 0.50mm m < partial size≤0.80m mass ratio be 15~20wt%；0.30mm < partial size≤0.50mm Mass ratio be 20~25wt%；0.10mm < partial size≤0.30mm mass ratio is 15~20wt%；0 < partial size < 0.10mm matter Amount is than being 45~50wt%；
S102, grinding: it is ground the siccative matched in step S101 to obtain powder；
S103, it is granulated extrusion: after the powder after grinding is granulated, being squeezed into using the extruder for installing mold Type obtains green compact；
S104, roasting: it puts the green body into roaster and is roasted to obtain roasting product；
S105, leaching metal: being placed in graphite crucible after roasting product is weighed, and preheated by preheating furnace, simultaneously will Ready copper is put into melting tank, is initially powered up, and electric current is adjusted to 220A, and extremely metallization is to meet leaching after being powered 2 hours The liquid that metal requires, then graphite crucible is taken out, be placed on from preheating furnace under melting tank, the metallic solution that will have been melted After pouring into the pyrographite crucible equipped with carbon item, high-temperature crucibles are put into vacuum equipment and are vacuumized, when vacuum degree 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 The product arrived i.e. metal-impregnated carbon draw runner material.
In the step S105, the heating curve of preheating furnace preheating are as follows: heated up and protected with 250 DEG C/h rate when room temperature ~ 400 DEG C Hold 1.5h；With the rate heating 1h of 500 DEG C/h at 400 ~ 900 DEG C；With the rate heating 2h of 175 DEG C/h at 900 ~ 1250 DEG C.
The partial size quality proportioning of pitch coke in the aggregate are as follows: 0.50mm m < partial size≤0.80m mass ratio is 15wt%； 0.30mm < partial size≤0.30mm mass ratio is 25wt%；0.10mm < partial size≤0.30mm mass ratio is 15wt%；0 < partial size The mass ratio of < 0.10mm is 45wt%.
In the step S104, the roasting heating curve are as follows: heat up and 25 DEG C and protect per hour when room temperature ~ 250 degree Celsius 10h is held, heating 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 per hour, and 1200 DEG C of heat preservations are for 24 hours；1200 ~ 300 DEG C of Temperature falls；300~150 DEG C or less it is aeration-cooling.
The step S101 further includes the steps that the 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 floats up and down ± 2 DEG C, engine speed≤12R/ Min when holding 1 is small after temperature reaches set temperature, starts powder to be added screw machine, opens screw machine and powder is sent to Pelletizer storage bin adjusts the blanking velocity of storage bin, opens pelletizer；The set 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 floats up and down ± 5 DEG C, and when the temperature of mold barrel rises to set 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 are as follows: 73:27 ~ 78:22.
Compared with the prior art, the invention has the following beneficial effects:
1, nano-carbon powder is added in preparing raw material to guarantee carbon material structure compactness in the present invention, improves material volume Density, in addition, the raw material of the present invention that prepare are the extensive material in market, at low cost, preparation process of the present invention is more simple It is single, it is conducive to produce in enormous quantities；
2, preparation method of the invention improves product mechanical strength, anti-attrition and self-lubrication by leaching alloying technology Deng；The metal-impregnated carbon draw runner material prepared using preparation method of the invention, resistance to big power frequency and dash current impact, resistance stabilization Resistance to electric arc；
3, to be stablized using carbon draw runner material structure prepared by preparation method of the invention, physicochemical property is strong, has a safety feature, Its carbon strip material performance is bulk density≤2.0 ~ 3.0g/cm3, flexural strength >=80Mpa, compression strength >=110Mpa, impact Toughness >=0.30J/cm2, 20 DEG C of resistivity≤10 μ Ω m, Rockwell hardness≤115.
Specific embodiment
To keep technical solution of the present invention and advantage clearer, below in conjunction with specific embodiment, to skill of the invention Art scheme is clearly and completely described, it is clear that described embodiment is a part of the embodiments of the present invention, rather than complete The embodiment in portion；Based on the embodiments of the present invention, those of ordinary skill in the art are without creative efforts Every other embodiment obtained, shall fall within the protection scope of the present invention.
The embodiment of the invention provides a kind of preparation methods of novel pure carbon draw runner material of pantograph, comprising the following steps:
1, it selects raw material and is matched.
Inventor passes through many experiments, researchs and analyses and produces 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 binder 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 binder modified coal asphalt are 110 ~ 120 DEG C, and coking value is >=55%, ash content≤0.30%.Be conducive to The higher roasting product of bulk density is obtained, is conducive to improve product qualification rate, the physics and chemistry of final products, which refers to, sufficiently to be obtained Meet.In addition, the weight ratio of siccative and binder is 65:35 ~ 74:26 in the raw material；In the siccative, aggregate pitch coke With the mass ratio of powder nano-carbon powder are as follows: 60:40 ~ 80:20；The partial size quality proportioning of pitch coke is 0.50mm m < grain in aggregate Diameter≤0.80m mass ratio is 15~20wt%；0.30mm < partial size≤0.50mm mass ratio is 20~25wt%；0.10mm< Partial size≤0.30mm mass ratio is 15~20wt%；0 < partial size < 0.10mm mass ratio is 45~50wt%.
Preferably, it is 35 ~ 75nm that the nano-carbon powder, which is preferably granularity D50,.
Preferably, in the raw material, the weight ratio of siccative and binder is 70:30 ~ 72:28.
Preferably, in the siccative, the mass ratio of aggregate pitch coke and powder nano-carbon powder are as follows: 70:30 ~ 72:28.
Preferably, the partial size quality proportioning of pitch coke is that 0.50mm m < partial size≤0.80m mass ratio is in the aggregate 15wt%；0.30mm < partial size≤0.30mm mass ratio is 25wt%；0.10mm < partial size≤0.30mm mass ratio is 15wt%； 0 < partial size < 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 expansion coefficient can reach an extraordinary balance, and the volume of prepared graphite product is close Degree is big, the porosity is small, thermal expansion coefficient is small.
In addition, the preparation method of the embodiment of the present invention can also include the broken and screening to aggregate before ingredient Step is elected to after making good use of need pitch coke block to be used, block is crushed, and after being sieved according to its partial size, leads to The granularity quality proportioning for crossing above-mentioned pitch coke carries out ingredient.
2, it grinds.
The siccative matched in step S101 is ground to obtain powder, it is 99.99% that grinding, which requires purity,.
3, it is granulated and squeezes out.
The purpose of this step is that the powder after grinding is carried out extrusion forming to obtain green compact；It is required that the pellet squeezed out is point Bulk, pellet must not bond, unite.Therefore, the dosage of binder is particularly significant, in the embodiment of the present invention, siccative and binder Weight proportion be 66:34 ~ 73:27, preferably 70:30 ~ 72:28, the green compact that can make in this way meet the requirements.
In this step, the uniformly mixed feed powder by grinding is added in pelletizer is granulated first, set pelletizer 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 float up and down ± 2 DEG C, engine speed≤12R/min；It is protected after set temperature reaches requirement It holds 1 hour, starts powder to be added screw machine, open screw machine powder and be sent to pelletizer storage bin, adjust storage bin Blanking velocity is opened pelletizer and is squeezed out, and cutter while opening pelletizer by pelletizer outlet is opened, adjustment cutter speed Degree；The particle of extrusion is dispersed, and particle is put into dedicated barrel.Used in the embodiment of the present invention is extrusion molding side Formula, siccative required for extrusion molding requires substantially not to be in bulk, that is, consumption of binder requires, and concurrently sets mold 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 floats up and down ± 5 DEG C, and when set temperature rises to set temperature, observation starts charging and squeezes out after stablizing, The bulk density of extrusion molding, green compact after molding reaches 2.0 ~ 2.5g/cm3。
4, it roasts.
The purpose of roasting is to carbonize binder pitch, excludes volatile matter, makes the binder 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 are as follows: 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 is redistributed because of capillarity, the transfer of part pitch；At 250 ~ 450 DEG C When, it heats up 8 DEG C per hour, at this point, polycondensation reaction enhances in roasting product, largely excludes fugitive constituent, coke initially forms, and is conducive to The coking rate of binder is improved, carbonization at low temperature is changed into coking；At 450 ~ 700 DEG C, heat up 5 DEG C per hour, polycondensation reaction at this time Continue to occur, the further coking of product is heated up with this heating rate, is conducive to the bulk density for improving roasting product and strong Degree；It at 700 ~ 900 DEG C, heats up 5 ~ 6 DEG C, is heated up with very fast heating rate per hour, the institutional framework of roasting product is into one 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；It at 1100 ~ 1200 DEG C, heats up 6 ~ 7 DEG C per hour, consolidates roasting effect.
In the embodiment of the present invention, the roasting heating curve are as follows: heat up and 25 DEG C and protect per hour when room temperature ~ 250 degree Celsius 10h is held, heating 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 per hour, and 1200 DEG C of heat preservations are for 24 hours；1200----300 DEG C of Temperature fall； 300----150 DEG C or less aeration-cooling.The bulk density of roasting product after roasting reaches 1.8 ~ 2.2g/cm3。
5, metal is soaked.
In preparation method of the invention, leaching metal is an important procedure for material production, and leaching metal, which refers to, soaks metal Enter in roasting product.In the embodiment of the present invention, metal is soaked specifically comprises the processes of: it is placed in graphite crucible after roasting product is weighed, and It is preheated by preheating furnace, heating curve when preheating in preheating furnace are as follows: with the heating of 250 DEG C/h rate when room temperature ~ 400 DEG C Keep 1.5h；With the rate heating 1h of 500 DEG C/h at 400 ~ 900 DEG C；With the rate heating 2h of 175 DEG C/h at 900 ~ 1250 DEG C. While roasting product is preheated, ready copper is put into melting tank, is initially powered up, electric current is adjusted to 220A, energization 2 Graphite crucible is taken out from preheating furnace then, is placed on fusing to meet the liquid for soaking metal requirement to metallization after hour Under pond, after the metallic solution melted is poured into the pyrographite crucible equipped with carbon item, high-temperature crucibles are put into vacuum equipment In, it is ensured that start to vacuumize after errorless, after vacuum degree reaches 0.085MPa, vacuum terminates, and is placed again into preheating furnace and preheats It is taken out after half an hour to room temperature, by clearing up obtained product i.e. metal-impregnated carbon draw runner material after coming out of the stove.By soaking metal work Skill makes the rate of body weight gain of product reach 33 ~ 35%.
The present invention provides a kind of methods using nano-carbon powder preparation pantograph metal-impregnated carbon draw runner material, utilize nanometer Carbon dust is raw material, guarantees carbon material structure compactness, material volume density is improved, in addition, preparation of the present invention is former Material is the extensive material in market, and at low cost, preparation process of the present invention is relatively simple, is conducive to produce in enormous quantities；Preparation of the invention Method improves product mechanical strength, anti-attrition and self-lubrication etc. by leaching alloying technology；Using preparation method of the 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 preparation of the invention The carbon draw runner material structure of method preparation is stablized, and physicochemical property is strong, has a safety feature, carbon strip material performance be bulk density≤ 2.0-3.0g/cm3, flexural strength >=80Mpa, compression strength >=110Mpa, impact flexibility >=0.30J/cm2, 20 DEG C of resistivity≤ 10 μ Ω m, Rockwell hardness≤115.It can be in some fields completely instead of other materials for mechanical strength and resistivity The pure carbon carbon draw runner of pantograph produced.
The embodiment of the present invention is explained in detail above, but the present invention is not limited to above-described embodiments, in ability Domain those of ordinary skill within the scope of knowledge, can also make various changes without departing from the purpose of the present invention Change.

Claims (8)

1. a kind of method using nano-carbon powder preparation pantograph metal-impregnated carbon draw runner material, which is characterized in that including following step It is rapid:
S101, raw material is selected simultaneously to be matched, the raw material includes siccative and binder, 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 states powder and selects granularity D50For the nano-carbon powder of 30 ~ 80nm, it is 110 ~ 120 DEG C that the binder, which selects softening point, and coking value is >=55%, the modified coal asphalt of ash content≤0.30%, the weight ratio of siccative and binder is 65:35 ~ 74:26 in the raw material；Institute State the mass ratio of aggregate pitch coke and powder nano-carbon powder in siccative are as follows: 60:40 ~ 80:20；The partial size of pitch coke in the aggregate Quality proportioning are as follows: 0.50mm m < partial size≤0.80m mass ratio is 15~20wt%；0.30mm < partial size≤0.50mm quality Than for 20~25wt%；0.10mm < partial size≤0.30mm mass ratio is 15~20wt%；0 < partial size < 0.10mm mass ratio is 45~50wt%；
S102, grinding: it is ground the siccative matched in step S101 to obtain powder；
S103, it is granulated extrusion: after the powder after grinding is granulated, carrying out extrusion forming using the extruder for installing mold and obtain To green compact；
S104, roasting: it puts the green body into roaster and is roasted to obtain roasting product；
S105, leaching metal: being placed in graphite crucible after roasting product is weighed, and preheated by preheating furnace, while will prepare Good copper is put into melting tank, is initially powered up, and electric current is adjusted to 220A, and extremely metallization is to meet leaching metal after being powered 2 hours It is required that liquid, graphite crucible is taken out from preheating furnace then, is placed under melting tank, the metallic solution melted is poured into After in pyrographite crucible equipped with carbon item, high-temperature crucibles are put into vacuum equipment and are vacuumized, when vacuum degree 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 The product arrived i.e. metal-impregnated carbon draw runner material.
2. a kind of method using nano-carbon powder preparation pantograph metal-impregnated carbon draw runner material according to claim 1, It is characterized in that, in the step S105, the heating curve of preheating furnace preheating are as follows: with the heating of 250 DEG C/h rate when room temperature ~ 400 DEG C Keep 1.5h；With the rate heating 1h of 500 DEG C/h at 400 ~ 900 DEG C；With the rate heating 2h of 175 DEG C/h at 900 ~ 1250 DEG C.
3. a kind of method using nano-carbon powder preparation pantograph metal-impregnated carbon draw runner material according to claim 1, It is characterized in that, the partial size quality proportioning of pitch coke in the aggregate are as follows: 0.50mm m < partial size≤0.80m mass ratio is 15wt%；0.30mm < partial size≤0.30mm mass ratio is 25wt%；0.10mm < partial size≤0.30mm mass ratio is 15wt%； 0 < partial size < 0.10mm mass ratio is 45wt%.
4. a kind of method using nano-carbon powder preparation pantograph metal-impregnated carbon draw runner material according to claim 1, It is characterized in that, the weight ratio of siccative and binder is 70:30 ~ 72:28 in the raw material.
5. a kind of method using nano-carbon powder preparation pantograph metal-impregnated carbon draw runner material according to claim 1, It is characterized in that, in the step S104, the roasting heating curve are as follows: heat up and 25 DEG C and protect per hour when room temperature ~ 250 degree Celsius 10h is held, heating 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 per hour, and 1200 DEG C of heat preservations are for 24 hours；1200 ~ 300 DEG C of Temperature falls；300~150 DEG C or less it is aeration-cooling.
6. a kind of method using nano-carbon powder preparation pantograph metal-impregnated carbon draw runner material according to claim 1, It is characterized in that, the step S101 further includes the steps that the broken and screening to aggregate pitch coke.
7. a kind of method using nano-carbon powder preparation pantograph metal-impregnated carbon draw runner material according to claim 1, It is characterized in that, 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 floats up and down ± 2 DEG C, engine speed≤12R/ Min when holding 1 is small after temperature reaches set temperature, starts powder to be added screw machine, opens screw machine and powder is sent to Pelletizer storage bin adjusts the blanking velocity of storage bin, opens pelletizer；The set 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 floats up and down ± 5 DEG C, and when the temperature of mold barrel rises to set temperature, observation starts charging extrusion molding and given birth to after stablizing Base.
8. a kind of method using nano-carbon powder preparation pantograph metal-impregnated carbon draw runner material according to claim 1, It is characterized in that, in the siccative, the mass ratio of aggregate pitch coke and powder nano-carbon powder are as follows: 73:27 ~ 78:22.
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