KR100742231B1 - Manufacturing method for a molded article having charcoal - Google Patents

Abstract

Provided is a manufacturing method of a molded article containing charcoal to enhance ultraviolet radiation and to generate antibacterial and deodorant effects. The manufacturing method of a molded article comprises the steps of: preparing a molding material by mixing and milling 34-46wt.% charcoal and 54-66wt.% artificial graphite, adding 79-89wt.% mixture to 13-21wt.% phenol resin used as a binder in a mixer heated to 140deg.C, blending for 30-60 minutes, and cooling to mill again to 80-200 meshes; molding in a heating press mold filled with the molding material; performing a primary firing at 200-300deg.C for 1-3 hours; performing a secondary firing at 250-400deg.C for 10-20 hours; and performing surface treatment or surface coating to obtain a finished molded article.

Description

Manufacturing Method for a Molded Article having Charcoal}

1 is a process chart showing a preferred example of the present invention.

The present invention relates to a method for producing a variety of molded products made of charcoal, such as charcoal charcoal in various forms such as fire plate, tile, bed top plate, crypt.

In general, in the case of existing molded products made of various forms containing coke powder, carbon powder, charcoal powder containing charcoal, etc., the binder is put at high pressure and press-molded to pressurize the molded product. In some cases, the fluorocarbon resin may be coated and completed. Alternatively, after press molding is carried out at a high pressure, the firing process may be performed at a high temperature furnace of 1,300 ° C. for a long time, and then cooled naturally to reduce pore inside the internal structure. After the secondary calcining heat treatment in the method of finishing and finishing the coating and the surface is known.

However, such a conventional manufacturing method causes a large amount of shrinkage and deformation of the product during heat treatment of the intermediate product, which easily causes breakage or a high defect rate, and makes quality control difficult. The beneficial intrinsic ingredients of the charcoal is blown away and there is a problem that can not expect the effect as intended.

The present invention has been researched and developed to solve such a conventional problem.

The main purpose of the present invention is to control the content ratio of the functional charcoal and the molding quality, and to control the content ratio of the charcoal, the charcoal containing the charcoal after the completion of the firing at a low temperature is possible. As a function, it is intended to exert an increase in the radiation effect of far infrared rays, an antibacterial effect and a deodorizing effect.

Another object of the present invention is to make the molding smoothly even in the state containing charcoal containing charcoal to improve the strength to lower the defective rate and to facilitate quality control.

In order to achieve the above objects, the present invention, in the manufacture of a molded product through a finishing process including a plastic heat treatment process and a surface coating process followed by pressure-heat molding by mixing the powder and the binder including charcoal, charcoal 34 1 to 46% by weight of artificial graphite at a ratio of 54 to 66% by weight until the first 80 to 200 mesh to obtain a charcoal mixture by mixing, the charcoal mixture of 79 to 89% by weight of the binder and the phenol resin 13 to 21 A material preparation step of obtaining a molding material in the form of particles of 80 to 200 mesh by putting into a mixer heated at 140 ° C. in a weight% ratio and mixing evenly for 30 to 60 minutes, cooling to room temperature in a lump form, and then crushing it secondly. The temperature of the mold is maintained at 120 to 240 ° C. in the heating press mold, and the molding material prepared in the material preparation process is filled in the mold. Molding process to carry out press molding and obtain the molded basic molded product, the basic molded product obtained in the molding process is put into an electric heating furnace and calcined for 1 to 3 hours at a temperature of 200 to 300 ℃ and cooled to room temperature The primary firing step to obtain, the secondary firing step of firing the primary firing product for 10 to 20 hours at a temperature of 250 to 400 ℃ inside the electric heating furnace and cooling to room temperature to obtain a secondary firing product, and the Provided is a manufacturing method including a finishing process of finishing the surface of the secondary plastic product and performing surface coating.

The following is a more detailed description of each process.

Material Preparation Process

Charcoal and artificial graphite are pulverized and mixed to obtain a charcoal mixture, and the charcoal mixture and the binder are heat mixed to obtain a molding material.

At this time, the charcoal mixture is mixed and pulverized in the ratio of 34% by weight to 46% by weight of charcoal and 54% by weight to 66% by weight of artificial graphite. Obtain a mixture.

Next, the charcoal mixture thus obtained is mixed in a ratio of 79 to 89% by weight and 13% by weight to 21% by weight of the phenolic resin as a binder, but the mixing process is to put the charcoal mixture and the binder into a mixer heated to 140 ℃ 30 After mixing evenly for 60 minutes to cool to room temperature in the form of a lump, and then pulverized again to form a particle form of 80 to 200 mesh to obtain a phenolic resin molding material.

When the pitch powder is used instead of the phenol resin as the binder, the pitch powder is mixed at a ratio of 13% by weight to 21% by weight, and the mixing process is carried out by adding the charcoal mixture and the binder to a mixer heated to 140 ° C. The mixture is evenly mixed for 30 to 60 minutes, cooled to room temperature in a lump form, and then crushed again to form particles of 80 to 200 mesh, thereby obtaining a pitch molding material.

Molding process

Next, the molding process is a process of filling the mold with a phenol resin molding material or a pitch molding material obtained in the material preparation process and pressurizing and heating the mold, wherein the temperature of the mold is 120 ℃ to 240 ℃ Maintaining and press molding is performed in a state in which the molding material prepared in the material preparation process is filled in the mold to obtain a molded basic molded product.

At this time, if the temperature inside the mold is maintained at 120 ° C to 240 ° C, the molding of the basic molding product is performed properly, and the basic molding product can be easily demolded from the mold. Incomplete molding occurs and demoulding cannot be performed properly.

Primary Firing process

Next, the primary firing step is a process of putting the basic molded product obtained in the molding process into a heating furnace, and in the case of the basic molded product by the phenol resin molding material, the basic molded product is put into an electric heating furnace at 200 ° C. It is the process of baking for 1 to 3 hours at the temperature of -300 degreeC, and then cooling to room temperature to obtain a primary baked product.

At this time, when the first firing process is performed, the structure of the phenol resin used as the binder is changed into a network structure in a linear structure, thereby greatly increasing the strength of the product. You get

In the case of the basic molding product using the pitch molding material, the basic molding product is placed in a heating furnace in the first firing process and fired for 30 hours to 60 hours at a temperature of 300 ° C. to 600 ° C. After intensive release, the mixture is cooled to room temperature over 2 days to obtain a primary calcined product.

Secondary Firing process

Next, the secondary firing step is a step of baking the primary firing product obtained in the primary firing process in a heating furnace and firing it in a secondary furnace, and in the case of the primary firing product by the phenol resin molding material, it is put in an electric heating furnace. It is a process for calcining for 10 hours to 20 hours at a temperature of 250 ℃ to 400 ℃ inside and cooling to room temperature to obtain a secondary calcined product.

At this time, when the secondary firing process as described above, the phenol resin dispersed in the network structure as a binder causes a chemical change to cause a carbonization phenomenon and have a more solid structure.

In addition, in the case of the primary fired product by the pitch molding material, the temperature of the internal firing is 600 ° C to 1,000 ° C as a temperature at which the primary fired product naturally cooled in the primary firing process is put into a heating furnace and carbonization starts. It is calcined by heating at for 5 days, the heating is stopped, the heating is maintained for 24 hours, cooled until the internal temperature of the furnace is cooled to 300 ° C., and then cooled to room temperature to obtain a secondary plastic product.

In this case, in order to prevent deformation of the product during the secondary firing process, it is preferable to fill the coke between the product and the product so that the internal atmosphere of the heating furnace has a reducing atmosphere during the predetermined process.

Finishing process

Next, the finishing process is a process of finishing the surface of the product after the secondary firing process and performing a surface coating, after cooling to a room temperature after the secondary firing process is finished to finish the surface of the secondary plastic product The finished product is surface coated with Teflon or ceramic powder by various methods such as spray coating method or electric or powder coating, and the coated product is dried before completing the product.

As a product obtained through the above process, in the case of the product produced by the phenol resin molding material or pitch molding material according to the present invention, the strength is improved through the first and second firing process, as well as having charcoal In addition to the function of generating negative ions, which is a basic characteristic, it has various beneficial effects such as deodorizing function, and it is possible to selectively use molds prepared for products of the desired shape in the molding process. Manufacturing can take place in the form of a product.

In fact, as a prototype according to the present invention, a charcoal mixture was obtained by mixing and grinding at a ratio of 40% by weight of charcoal and 60% by weight of artificial graphite, and heating the temperature to 140 ° C at a rate of 18% by weight of 82% by weight of the charcoal mixture and the binder phenolic resin. And then evenly mixed and then cooled to room temperature to obtain a molding material in the form of 100 mesh particles. The tile-shaped sample obtained through the molding, primary firing and secondary firing processes was subjected to the Korea Far Infrared Application Evaluation Institute and the Korea Building Materials. The following test results were obtained by requesting a test researcher.

In the case of far-infrared energy emissivity (5 ~ 20㎛) by the sample was found to be 0.923 compared to the BLACK BODY using the FT-IR Spectrometer at 37 ℃, 3.56 for the radiation energy (W / ㎡ · ㎛, 37 ℃) X 10².

By performing the antimicrobial test by the sample, as shown in the following Table 1, the sample was confirmed that the bacteria significantly reduced.

 Test Items Test result  Test Methods Initial concentration (CFU / 40p) Concentration after 24 hours (CFU / 40p) Bacterial Reduction Rate (%) Antibacterial test by E. coli BLANK 422 2892 -  KCIM-FIR-1002 Charcoal tiles 422 225 46.7 Antibacterial test by Pseudomonas aeruginosa BLANK 433 2943 - Charcoal tiles 433 432 0.2

In addition, the deodorization test was carried out, and as shown in Table 2, it was confirmed that the deodorizing effect was remarkable as time passed.

Test Items Deodorization Test (HCHO) Elapsed time (minutes) Blank concentration (ppm) Sample concentration (ppm) Deodorization rate (%)   Test result 0 81 81 - 30 78 23 70.5 60 75 16 78.7 90 72 12 83.3 120 70 10 85.7 Test Methods KICM-FIR-1085

As described above, according to the manufacturing method of the present invention, after controlling the content ratio of the binder which affects the functionally beneficial charcoal and the molding quality and firing temperature at low temperature, the firing treatment is possible to include charcoal. It is a unique function of charcoal, which is beneficial to increase the radiation effect of far-infrared radiation, antibacterial effect and deodorizing effect. Low quality control can be achieved.

Claims (3)

In the manufacture of the molded product by mixing the powder containing the charcoal and the binder by pressurization and heat molding, and then finishing the process including the plastic heat treatment process and the surface coating process, Charcoal mixture was obtained by primary pulverizing mixing until it became 80-200 mesh in the ratio of 34-46 weight% of charcoal and 54-66 weight% of artificial graphite, and the phenol resin 13 which is 79-89 weight% of this charcoal mixture is a binder. Material to obtain a molding material in the form of particles of 80 to 200 mesh by putting into a mixer heated to 140 ℃ at a ratio of 21 to 21% by weight, mixed evenly for 30 to 60 minutes, cooled to room temperature in the form of lumps, and then secondaryly pulverized. Preparatory Process, Molding process in which the temperature of the mold is maintained at 120 to 240 ° C. in the heating press mold, and the molding material prepared in the material preparation process is filled into the mold, press molding is performed, and a molded basic molding product is obtained. The primary firing step of obtaining the primary firing product by placing the basic molded product obtained in the molding process in an electric heating furnace for 1 to 3 hours at 200 to 300 ℃ temperature and cooling to room temperature, Secondary firing step of firing the primary firing product in an electric heating furnace at a temperature of 250 to 400 ℃ for 10 to 20 hours and cooling to room temperature to obtain a secondary firing product, and A method for producing a molded product containing charcoal, characterized in that it comprises a finishing step of finishing the surface of the secondary plastic product and performing a surface coating. The method of claim 1, When the primary firing process is a basic molded product using the pitch molding material, the basic molded product is placed in a heating furnace in the first firing process and fired at 300 ° C. to 600 ° C. for 30 hours to 60 hours. Concentrated release of the volatiles contained therein and then cooled to room temperature over 2 days to obtain a primary firing product, In the secondary firing process, the primary firing product by the pitch molding material is a temperature at which carbonation is started by putting the primary firing product naturally cooled in the first firing process into a heating furnace, and the internal temperature is 600 ° C to 1,000 ° C. It is calcined by heating for 5 days at the temperature of, and the heating is stopped, it is kept warm for 24 hours, cooled until the internal temperature of the furnace is cooled to 300 ℃ and then cooled to room temperature to obtain a secondary plastic product. A method for producing a molded product containing charcoal. The method of claim 2, In order to prevent deformation of the product during the secondary firing process, coke is filled between the product and the product so that the internal atmosphere of the heating furnace has a reducing atmosphere during a predetermined process. Method of manufacturing molded products.

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