JP4884487B2 - Carbon aggregate molded material and method for producing carbon aggregate molded article - Google Patents

Description

  The present invention relates to a carbon aggregate used in a cooking utensil such as a rice cooker capable of electromagnetic induction heating, and relates to a carbon aggregate molding material and a method for producing a carbon aggregate molded article. More specifically, a carbon aggregate molded product obtained by injection molding or the like using a carbon aggregate molding material mainly composed of carbon powder and a binder that is a high carbon content substance, and pressurizing and heating in a mold. The present invention also relates to a method for producing a carbon aggregate molded product, which obtains a carbon aggregate molded product by performing a baking treatment for carbonization in an oxygen-free high temperature atmosphere.

  The stove or rice cooker of an electromagnetic heating cooker uses electromagnetic induction heating that generates heat due to eddy currents from an electromagnetic induction heating coil, and has a feature that quick and uniform heating of the cooker can be obtained. The mainstream of the electromagnetic heating cooker is a clad formed by laminating a highly heat conductive metal such as aluminum or copper and a magnetic metal into a pan shape. However, the clad material has a problem that it is difficult to process the shape of a pan, a pot, or the like, and the laminated interface of the surface of the heat-resistant resin coating surface such as fluororesin is easily peeled off.

  For this reason, the use of a carbon aggregate having excellent electrical conductivity, dielectric properties, and excellent thermal conductivity has been proposed as a material of an electromagnetic induction heating cooker that replaces conventional iron and stainless steel (for example, , See Patent Document 1).

  Further, a cut product of a carbon compression body that has been pressed and condensed into a columnar shape has been proposed, and it is stated that a carbon material is effective as a cooking utensil at a high temperature (for example, see Patent Document 2). .

  According to the above-described method of manufacturing a cooking utensil, a mixture mainly composed of a binder that is a high carbon content such as phenol or pitch is formed on carbon particles such as coke, and this mixture is 1000 to 3000 in an oxygen-free atmosphere. After heating at ℃ to obtain a carbon aggregate, it is cut into an arbitrary shape. However, cutting the carbon sintered body into an arbitrary shape has the problem that the material in the hollow part of the concave portion of the container that occupies most of the cutting is discarded, and the number of processing steps is large. . In addition, it is difficult to detect defects such as pores in the carbon compression body in advance, and it is exposed by cutting and adversely affects various properties such as design and strength.

  As a means to solve these problems, it is obtained after injecting a molding material, which is a mixture of carbon powder and a binder material such as a phenolic resin raw material liquid and tar pitch, into a mold and pressurizing and molding. There has been proposed a means for obtaining a carbon aggregate formed into a pan shape by firing the molded product (see, for example, Patent Document 3).

  However, as a necessary characteristic for use as a cooking utensil capable of electromagnetic induction heating, in order to obtain a carbon aggregate molded product with excellent strength, electrical conduction, and thermal conduction, raw materials with reduced phenol resin content are apparent. In addition, the viscosity of the carbon particle is improved and the fluidity is lowered, and the surface of the carbon powder particles is not sufficiently wet and is difficult to slip, so that it is easy to agglomerate. Therefore, the fluidity is lost and an unfilled portion is easily formed. For this reason, it is necessary to increase the content of the phenol resin until the molding material has sufficient fluidity.

  In addition, since the internal stress generated with the flow during molding remains in the molding material in the mold, relatively, due to the strain release behavior and the diffusion of decomposition gas generated from phenol resin, etc. during the firing stage of the molded product, Cracks in welds that are fragile parts, inner layer parts where coarse particles gather and the adhesion between the particles is insufficient, and surface layers where a large amount of phenolic resin collects and the pores that dissipate gas hardly remain There was a problem of generating.

  Therefore, a molded product using a molding material in which carbon powder and binder are mixed has a good flow state such as filling the molding material while maintaining the inside of the mold in a reduced pressure state in order to obtain homogeneous and high physical properties. It is important to ensure. Therefore, as a measure for ensuring the fluidity of the molding material, it is essential to increase the amount of a molten resin component such as a phenol resin or to add a high pressure.

  As described above, in order to ensure sufficient fluidity, high strength and thermal conductivity, a molding material in which a binder, which is a liquid high-carbon content substance such as a phenol resin, is sufficiently applied to the surface of carbon powder particles is used. It is important to mold while maintaining a high pressure load so that the carbon powder particles are in close contact with each other. On the other hand, in addition to the increase in internal stress, it is difficult to secure pores for scattering of decomposition gas generated during the firing process as the binder fills the voids formed between the particles. It will be brewed.

  This is because the increase in internal pressure due to generation of cracked gas generates cracks inside the molded product due to resin shrinkage and expansion due to release of compressive stress received by the carbon particles, and crack expansion due to the aggregate of cracked gas In order to avoid this problem, the rate of generation of cracked gas can be reduced by relaxing the heating rate during firing when the resin component decomposes and maintaining it at a low temperature for a long time. Since it is essential to slow down, a situation has arisen that requires a long time for the baking treatment.

  As a means of avoiding the above problems, cracking, blistering, air bubbles, etc. by sintering in a non-oxidizing atmosphere a pressure molded material using a molding material in which an organic binder as a binder is mixed with a thermoplastic resin Means for manufacturing a dense carbon sintered body with few defects has been proposed (see, for example, Patent Document 4).

JP-A-9-75211 JP-A-9-70352 JP 2007-04257 A Japanese Patent Laid-Open No. 08-113668

  However, according to the means of the above-mentioned Patent Document 4, it is difficult to maintain the shape because the organic binder as the binder is a thermoplastic resin. Moreover, since fine pores are generated as a whole, the density is lowered and the bonding force between the particles is reduced, leading to a reduction in the strength of the molded product as a cooking utensil, and the fine generated in the entire molded product. There is a problem that the high thermal conductivity inherent to the carbon sintered body is impaired by the pores.

  The present invention has been made to solve the above-described problems, and is capable of improving the strength and thermal conductivity of a carbon sintered compact, and the production of the carbon aggregate molding and the carbon aggregate molded article. Provide a method.

  In the carbon aggregate molding material according to the present invention, the surface of the carbon particle is coated with an uncured phenol resin obtained by polymerizing a compound containing a phenol group and an aldehyde group in the presence of a surfactant. A thermoplastic resin fine powder is held on a coating film of an uncured phenol resin.

  The carbon aggregate molding material according to the present invention is obtained by coating the surface of carbon particles with an uncured phenol resin obtained by polymerizing a compound containing a phenol group and an aldehyde group in the presence of a surfactant. Since the thermoplastic resin fine powder is held on the uncured resin coating film, the firing time of the molded product can be shortened, and cracks caused by the pressure of the decomposition gas remaining in the condensed molded product As a result, the strength and thermal conductivity of the sintered carbon article can be improved.

FIG. 5 shows the first embodiment and is a schematic diagram showing a concept relating to a covering state of a phenol resin in a molding material. The figure which shows Embodiment 2, and is a figure which shows the bending strength of a carbon condensation molding product, and the evaluation result of coating-film adhesiveness. It is a figure shown for a comparison, and is a schematic diagram which shows the concept regarding the state of resin adhesion obtained by press-kneading a carbon granular material and a phenol resin uncured material with an extruder or the like.

Embodiment 1 FIG.
First, an outline of the present embodiment will be described. The present embodiment is used for cooking utensils capable of electromagnetic induction heating, and relates to a carbon aggregate molded article having high thermal conductivity that ensures excellent temperature uniformity and excellent uniformity of heating. .

  The carbon aggregate molding material used here has a carbon particle surface dispersed in a polymerization stage in which phenol and formaldehyde coexist in a solvent such as water or alcohol to maintain a state in which the phenol resin is easily wetted to the particle surface. A mode in which a phenol resin is coated is provided.

  Furthermore, by interposing a cationic emulsifier, a protective colloid (polyion complex) is formed so that the phenol resin has a spherical shape so as to have a smooth surface on the surface of the carbon particle so that the phenol resin has stable aggregation centered on the carbon particle. ) Is formed, and the uncured phenol resin is coated and a stable state is secured while being dispersed in the solvent.

  The surfactant forms a cationic solution that exhibits polyelectrolyte behavior and forms a polyion complex with the phenol resin in the polymerization process.

  After the above reaction steps, a carbon aggregate molding material can be obtained by drying under reduced pressure at a low temperature in order to remove the solvent for the purpose of preventing fusion between particles.

  The carbon aggregate was obtained by injecting the above-mentioned carbon aggregate molding material into a heated mold and filling it, leaving the molded product at an oxygen-free high temperature and subjecting it to a firing treatment. It is. The carbon agglomerate molding material filled under pressure in the mold is completely cured after the phenolic resin is melted and filled, so that the phenol resin in which the molding in the mold is coated on the surface of the carbon particles Since the uncured material melts, high fluidity at the time of molding due to having excellent wettability achieves homogenization in the mold, and high due to the fact that fusion between the molding materials can be achieved without exception Strength is obtained.

  On the other hand, since the voids between the particles are reduced due to the improvement of the fluidity in the mold, it is necessary to solve the problem of shrinkage and cracking caused by the decomposition gas pressure in the firing process. This embodiment is characterized in that a thermoplastic resin is mixed in order to relax strain during shrinkage in a molten state and to generate pores that contribute to decomposition gas discharge by low-temperature decomposition. Therefore, the thermoplastic resin fine powder is required to have a melting point lower than the mold temperature.

  The carbon aggregate according to the present embodiment relates to a molded product for obtaining a carbon aggregate carbonized at a high temperature in an oxygen-free atmosphere, and is characterized by suppressing fluidity improvement during molding and cracking during firing. It is obtained from the molding material and is characterized in that it is held on the surface of the molding material by mixing the thermoplastic resin at the stage where the phenolic resin of the binder is coated on the surface layer of the carbon particles in the late polymerization stage. To do.

  The thermoplastic resin fine powder such as polyethylene held on the surface of the phenol resin coated with the carbon powder particles flows between the aggregated particles at the time of molding and fills the voids, and thus provides further fluidity.

  In addition, the thermoplastic resin tends to stay in the gap formed by the molding materials in contact with each other, melts during the firing process, and flows out of the system or moves to the low pressure region in response to the curing shrinkage of the molded product. Can easily relieve the generated stress. Furthermore, in a high temperature atmosphere, the thermoplastic resin is decomposed prior to the phenol resin as the binder to generate pores, so that it is possible to easily release the decomposition gas of the phenol resin.

  As a result, the firing time of the molded product can be shortened, and the occurrence of defects such as cracks caused by the pressure of the decomposition gas staying in the condensed molded product can be suppressed, so that the strength and thermal conductivity are improved. In addition, when a siloxane-based compound is mixed as an additive, a feature that the strength can be further improved can be imparted.

  Regarding a means for obtaining a pot-shaped molded product by compression molding, a method for producing an electromagnetic induction heating cooker obtained by filling a pot-shaped mold with a mixture of carbon powder and a binder as a raw material will be described in detail below. To do.

  FIG. 1 is a diagram showing the first embodiment, and is a schematic diagram showing a concept relating to a covering state of a phenol resin in a molding material.

  FIG. 3 is a diagram for comparison, and is a schematic diagram showing a concept relating to the state of resin adhesion obtained by pressure-kneading carbon powder and an uncured phenol resin with an extruder or the like.

  First, a method for producing a molding material will be described. Carbon granules obtained by pulverizing petroleum coke at an oxygen-free high temperature (about 3000 ° C.) and graphitized lump to 300 μm or less are poured into a mixture of water and phenol with stirring, and dispersed. A quaternary ammonium salt type cationic surfactant was mixed for use as a surfactant.

  There is also an embodiment in which the carbon particles contain graphite. Graphite is a crystal in which carbon atoms with a mesh-like surface structure arranged in a hexagonal shape gather in layers.

  As the quaternary ammonium salt type cationic activator used here, alkyltrimethyl type and alkyldimethylbenzyl type cationic activators are preferable.

  In addition, an alkyl group (referring to an organic substance (organic bond) in which carbon and hydrogen are bonded) is also a high-purity lauryl group, a palmityl group, a stearyl group, a behenyl group, or the like having about 10 to 25 carbon atoms. Things are effective. The alkyl group includes at least one of a lauryl group (C number; 12), a palmityl group (C number; 15), a stearyl group (C number; 18), or a behenyl group (C number; 22). .

  Surfactant forms a protective colloid, and the solution exhibits polyelectrolyte behavior to form an anionic water-soluble resin and a polyion complex, so that the carbon dispersed particles in which the resin dispersed in the solution is not excessively large If it is 300 micrometers or less, since it acts so that a spherical shape may be comprised, it is preferable.

  Next, while heating to an arbitrary temperature, stirring is performed so that the carbon powder particles are uniformly dispersed, and formaldehyde is added for polymerization. The addition amount of phenol and formaldehyde was adjusted so that the semi-cured phenol resin covering the surface of the particles would be 30 wt%, and the arbitrary degree of polymerization was adjusted by the temperature and time during the reaction.

  The obtained semi-cured thermoplastic resin polyethylene (PE) fine powder is mixed until 2 wt% of the semi-cured phenol resin is added and uniformly dispersed, and then 0.05 wt% of the micro resin is mixed. Fibrilized cellulose was added. The microfibrillated cellulose retains the thermoplastic resin fine powder.

  The uncured phenolic resin obtained by the above method was polymerized in a state where the surface of the carbon particle was always wet with the phenol resin raw material liquid, so that the granular resin formed as a film on the outer peripheral surface of the carbon particle It becomes a raw material for molding. At this time, the PE of the thermoplastic resin is carried on the surface of the semi-cured phenol resin after dehydration.

  The solution in which the molding material in which PE fine particles were carried on the surface of the semi-cured phenol resin was dispersed under reduced pressure, filtered and dehydrated, and then dried at a low temperature of 40 ° C.

  On the other hand, the bonding state of the molding materials obtained by the above-described means by heating and pressing during molding will be described with reference to conceptual diagrams (FIGS. 1 and 3).

  Compared with the conventional resin adhesion state obtained by pressure-kneading the carbon powder particles 1 and the phenol resin uncured product 2 shown in FIG. The phenol resin uncured product 2 forms a coating film on the surface of the carbon powder particles 1 so as to cover the acute fracture surface including the particles 1 to form a smooth surface.

  For this reason, the carbon aggregate forming raw material according to the present embodiment is easy to move to a suitable position by filling a void in the mold when pressed under heating at a temperature equal to or higher than the melting temperature. It has the characteristic of being excellent in.

  Next, specific means for obtaining a pan-like carbon aggregate molded product in the mold using this carbon aggregate molding material and the molding effects related to the above-mentioned carbon aggregate molding material will be described in detail. In some cases, the carbon aggregate molded material is simply referred to as a molding material, and the carbon aggregate molded product is simply referred to as a molded product.

  The mold is heated to a curing temperature of 160 ° C., and an arbitrary amount of molding material is charged. At this time, the phenol resin promotes the diffusion of gas such as water vapor generated as a by-product in the initial stage of the curing reaction, and the flow viscosity accompanying the progress of the reaction is not excessively high, in this embodiment, 80 to 90 seconds. Is held at a contact pressure that maintains a state in which the powder particles of the molding material have sufficient pores, and then a high pressure for obtaining a molded product having a dense molded product internal structure, 15 Mpa in this embodiment is applied. After pressing, the sample was removed from the mold after a holding time of 3 minutes.

  At this time, when the phenol resin uncured material coated on the surface of the carbon powder flows by pressing at the molding temperature, the fine particles carried on the outermost surface fill the void formed by the contact between the molding materials, An almost continuous layer will be formed.

  The obtained molded product is heated to 280 ° C. in an oxygen atmosphere. This is a post-curing treatment condition in which the phenol resin partially oxidizes PE without causing excessive oxidative decomposition, and facilitates the diffusion of a low molecular weight decomposition gas when left at high temperature in an oxygen-free atmosphere in the subsequent stage.

  At this time, since the polymerization of the phenol resin further proceeds even in a low temperature region of about 250 ° C. in the temperature rising stage, the shrinkage stress generated along with this remains in the voids formed by the molding material, and the molten state remains. Since the exhibited PE is mitigated by moving to the voids remaining outside or inside the molded product, defects such as cracks are suppressed.

  After the completion of the post-curing treatment, the molded product was left in a high-temperature atmosphere up to about 1200 ° C. in an oxygen-free state to carbonize the phenol resin, thereby obtaining a carbon aggregate molded product having a pan shape.

  In the firing treatment, decomposition of phenolic resin becomes active to cause a rapid weight loss in order to prevent local swelling caused by the decomposition gas staying inside the molded product and expanding the fault crack. In the vicinity of ℃, 500 ℃ and 800 ℃, it is effective to raise or maintain the temperature slowly.

  Specifically, up to 300 ° C. was reached at a rate of 0.5 ° C./min, and up to 350 ° C. at a rate of 1 ° C./hr, and held for 5 hours. Since continuous pores are formed by thermal decomposition of PE remaining in continuous voids where the molding materials are in contact with each other, the decomposition gas can be easily released, and the heating rate required for firing can be promoted.

  As a result, it was held for 5 hours after reaching the conventional 450 ° C. at 5 ° C./hr, up to 500 ° C. at 1 ° C./hr, up to 750 ° C. at 5 ° C./hr, up to 800 ° C. at 2 ° C./hr and 3 It was possible to significantly reduce the temperature increase and the holding time, which had been held for 2 hours by holding the time and then reaching 1200 ° C. at 0.5 ° C./min.

  Specifically, hold up to 750 ° C at 5 ° C / hr and up to 800 ° C at 2 ° C / hr for 3 hours, then reach 1200 ° C at 0.5 ° C / min for 2 hours. The firing time was shortened by about 2 days without causing any defects even when it was carried out.

  In addition, about cooling, the pot-shaped electromagnetic induction heating cooker in which dielectric heating is possible is obtained by cooling to room temperature vicinity at 0.5 degreeC / min.

Embodiment 2. FIG.
With respect to the pot-shaped molded product that is an electromagnetic induction heating cooker, means for obtaining a molded product that forms a carbon aggregate with a strengthened cooking surface by compression molding will be described in detail below.

  FIG. 2 is a diagram showing the second embodiment and is a diagram showing evaluation results of bending strength and coating film adhesion of a carbon condensation molded product.

  First, a method for producing a molding material will be described. 70 parts of carbon particles obtained by pulverizing a carbon lump obtained by calcining petroleum coke at a high temperature in an oxygen-free atmosphere to 300 μm or less, and a rice husk at 480 ° C. A carbon mixture was obtained by mixing 30 parts of rice husk charcoal that had been steamed and ground to 100 μm or less.

  Next, the carbon mixture and phenol diluted with water are mixed with stirring, and an alkyldimethylbenzyl type cationic surfactant having an alkyl moiety as a lauryl group is added as a surfactant, and then the mixture is heated to an arbitrary temperature. While heating, formaldehyde is added and polymerized while stirring so that the carbon particles are uniformly dispersed.

  The addition amount of phenol and formaldehyde is adjusted so that the amount of phenol resin in a semi-cured state covering the particle surface of the carbon mixture by the polymerization of both raw materials is 28 wt%, and the polymerization degree of the polymer can obtain a suitable viscosity. Thus, the temperature and time during the reaction were adjusted. Further, after the completion of the polymerization, after adding 0.7 wt% of PE fine powder, phenol and formaldehyde are newly added so that the amount of the phenol resin in a semi-cured state becomes 5 wt%, and the polymerization is repeated in the same manner. went.

  The solution in which the phenol resin reached the desired degree of polymerization after the lapse of an arbitrary time was filtered to remove the solvent water, followed by drying treatment to obtain a molding material.

  The molding material obtained by the above method polymerizes the phenol resin in a state where the surface of the carbon particle is always wet with the raw material liquid, so that the uncured phenol resin is coated on the outer peripheral surface of the carbon particle. Become. At this time, the PE of the thermoplastic resin is loaded in a semi-cured phenol resin that forms the outermost surface and is supported in a composite state.

  Next, as this molding material, 7 wt% of uncured phenol resin newly diluted with methanol to 20% was added and mixed, and then dried by aeration of methanol. Next, the mold is heated to 160 ° C., which is the curing temperature of the uncured phenol resin, so as to have a uniform thickness, and the mold is closed and pressurized. After holding for 60 seconds at a contact pressure that maintains the powder particles of the molding material with sufficient pores, gas such as water vapor as a by-product of reaction and formaldehyde as an unreacted residual resin material is diffused , 15 Mpa was pressurized and held for 3 minutes, and then removed from the mold.

  At the time of this pressurization, even if the uncured phenol resin is wet and flows at a pressure as low as the contact pressure, it flows so as to fill the void formed by contact with the molding material and flows in the mold. Furthermore, the phenol resin uncured material coated on the surface of the carbon particles in a high pressure application state of 15 Mpa is softened and hardened. At this time, the PE fine particles supported on the outermost surface flow to form a continuous PE layer in the molded product.

  The obtained molded article is first heated in air to 280 ° C., and then left in an oxygen-free atmosphere with nitrogen substituted in an atmosphere up to about 1200 ° C. to carbonize the phenolic resin. A carbon aggregate molded product having a shape was obtained.

  At this time, in the low temperature region of about 250 ° C. during the temperature rising process, the shrinkage stress generated due to the hardening of the phenolic resin or the release of the residual stress at the time of molding remains in the gap where the molding materials are in contact with each other, and the molten state Since the PE to be exhibited is mitigated by, for example, moving to the voids remaining outside the molded product system or inside the molded product, it is possible to suppress the occurrence of cracks and blisters, and to form a mode in which thermal decomposition is easy with oxidation.

  In particular, since the thermal decomposition of PE exists in a previously oxidized state, continuous pores are easily formed prior to the decomposition of the phenol resin. For this reason, since the subsequent decomposition gas can be easily released and the heating rate required for firing can be accelerated, there is no defect even if the heating rate is accelerated and the holding time is shortened compared to the case where PE is not added. Since it does not occur, the firing time could be shortened.

Further, CO ₂ generated when the phenol resin is decomposed and siloxane contained in the rice husk fumigation charcoal constituting the carbon particles react to hold at a temperature of 1000 ° C. or higher, preferably 1200 ° C. or higher, SiC (silicon carbide) can be produced to achieve significant strength improvements.

  In particular, if the particle size of rice husk fumigation charcoal is significantly smaller than that of graphitized carbon particles, the amount of phenol resin coating increases compared to the amount of carbon particle coating, so conversion to SiC Is preferable because the strength of the carbon aggregate molded product is easily improved.

  Next, the bending strength and the adhesion of the coating film were evaluated on the carbon condensation molded product produced using the molding material mixed with rice husk fumigation charcoal, and the result is shown in FIG.

  Coating film adhesion is performed by applying a silicone resin spray excellent in wear resistance and heat resistance, and the paint is impregnated into pores of the carbon aggregate molded product and fixed by an anchor effect. The peel strength of the coating film was determined by placing 11 cuts vertically and horizontally at a 1 mm interval in a checkerboard pattern on the surface of the coating film, attaching the tape to the surface, and repeating this peeling 10 times. The missing part of the part was confirmed and evaluated by the number of non-deficient cells (a / 100).

  On the other hand, in accordance with the production method shown in the present embodiment, a carbon aggregate molded product using a molding material into which rice husk fumigation charcoal is not added was compared, the same evaluation was performed, and the result is also shown in FIG. .

  As shown in FIG. 2, the carbon agglomerated molded product by the molding material shown in the present embodiment has significantly higher bending strength and coating film adhesion than the comparative example in which the husk fumigation charcoal, which is a siloxane-containing material, is not mixed. showed that. In particular, the adhesiveness of the coating film is that the release surface of the comparative example causes cohesive failure in the surface layer of the molded product, whereas the carbon aggregate molded product by the molding material shown in this embodiment is carbon. It was suggested that the bonding strength between the powder and the carbide of phenol resin is excellent.

  As shown above, it was confirmed that the use of a molding material combined with rice husk fumigation charcoal, which is a siloxane-containing material, has a significant strength improvement effect.

  In addition, instead of the rice husk fumigation charcoal shown in the present embodiment, a molding process using silicone oil or a silane coupling agent mixed in a molding material, or applying to a molded product, a firing treatment is performed. You can get the same effect even if you go.

  Further, in this embodiment, a phenol resin is used as the binder, but instead of this, if the substance has a high carbon content such as tar pitch, the decomposition product at the time of firing at high temperature is scattered. Substitution is possible because there is no carbon remaining and no shrinkage or insufficient bonding force occurs.

  1 carbon powder, 2 phenol resin uncured product.

Claims (9)

Kaoru蒸炭are mixed carbon powder grains and seed shells, the surface of the carbon powder particles is coated with phenol and Holm aldehydes by phenol resin uncured material was polymerized in the presence of a cationic active agent, before Symbol A carbon aggregate molding material characterized in that a surface portion of a phenol resin uncured material is composited with a thermoplastic resin fine powder.   2. The carbon aggregate molding material according to claim 1, wherein the carbon particles are particles containing graphite obtained by crushing a lump. The average particle size of the carbon powder grains, carbon aggregates molding material as claimed in claim 1 or claim 2, wherein it is under 300μm or less. The cationic active agent is a quaternary ammonium salt type having an alkyl trimethyl or alkyl dimethyl benzyl group, an alkyl group of at least, lauryl group, palmityl group, include either the stearyl group and a behenyl group The carbon aggregate molding material according to any one of claims 1 to 3 , wherein the carbon aggregate molding material is formed. Were mixed and Kaoru蒸炭of carbon powder grains and seed shells, the surface of the carbon powder particles is coated with a phenolic resin not yet cured product of phenol and formaldehyde polymerize in the presence of a cationic active agent, the phenol tree surface portion of the fat uncured material is carbon aggregate molding material comprising in combination a thermoplastic resin powder, after obtaining a molded article having an arbitrary shape by applying heat and pressure in a mold, which anoxic A method for producing a carbon aggregate molded article, comprising a firing treatment step in which the carbon aggregate is left in a high-temperature atmosphere. The carbon powder grains, the production method according to claim 5, wherein the carbon aggregate molded article, characterized in that the particles comprising the Graphite obtained by crushing the lumps. The average particle size of the carbon powder grains, 3 00μm The method according to claim 5 or claim 6 wherein the carbon aggregates molded article, characterized in that following a pressure. The method for producing a carbon aggregate molded article according to any one of claims 5 to 7 , wherein the cationic activator is a quaternary ammonium salt type having an alkyltrimethyl group or an alkyldimethylbenzyl group. The firing treatment step, the molded article below decomposition temperature of the phenolic resin was allowed to stand in an atmosphere containing oxygen or decomposition temperature of the thermoplastic resin, decomposition temperature or more of the phenolic resin in the absence of oxygen The method for producing a carbon aggregate molded product according to any one of claims 5 to 8 , wherein the method is left in an atmosphere .