baber/WOPTO huggingface dataset:
Patent KR-20090018537-A (KR)
Title: Valuation method for sealant condition number and valuation method for pavement condition number
Inventor: LEE KWANG HO
IPC: G01C5/00
Filed: 2007-08-17
Abstract: An evaluation method of sealant condition number of the road pavement provides the road pavement which efficiently performs the repairing road task. An evaluation method of sealant condition number of road pavement comprises following steps: an unit section dividing step dividing the subjected object section of the repair of the road pavement into a plurality of unit section; a sealant condition number inspection step inspecting the damaged sealant condition number of each unit section; a damage rate computation step computing the sealant condition number damage rate within each unit section; a class granting step giving the class to each unit section based on the calculated sealant condition number damage rate; a sealant condition number computing step computing the sealant condition number of each object section.
Patent KR-20070101185-A (KR)
Title: Polar group-containing olefin copolymer, process for preparing the same, and uses thereof
Inventor: IMUTA JUNICHI
IPC: C08F4/659
Filed: 2007-08-22
Abstract: An olefin copolymer containing a polar group, a method for preparing the olefin copolymer, and its use as an adhesive resin, a compatibilizer, a resin modifier, a filling dispersant, etc. are provided to improve the adhesion to a metal and a polar resin, compatibility and flexibility. An olefin copolymer containing a polar group comprises a constituting unit represented by the formula 1, a constituting unit represented by the formula 4, and optionally a constituting unit represented by the formula 5 and has a polydispersity index (Mw/Mn) of 3 and a strength ratio of (T_alphabeta/(T_alphaalpha+T_alphabeta)) measured by 13C-NMR, wherein R1 is H, or a C1-C18 linear or branched aliphatic hydrocarbon group; R5 is a hydrocarbon group; R6 is a hetero atom or a group containing a hetero atom; r is 0 or 1; Z is a polymer segment obtained by any one of anion polymerization, ring opening polymerization and polycondensation; W is OH or an epoxy group; p is an integer of 1-3; q is an integer of 0-2; p+q<=3; m is 0 or 1; and n is an integer of 1-3.
Patent KR-20090020177-A (KR)
Title: Grommet for battery module
Inventor: SHIMOYAMA YOSHIRO
IPC: H01M2/02
Filed: 2007-08-23
Abstract: A grommet supporter for a battery module improving cooling performance is provided to maintain the temperature of a battery module cooled in the inside of a case uniformly, and to increase the lifetime of the battery module. In a grommet supporter supporting a module while maintaining the interval of modules to a cylindrical battery module(21), a grommet supporter for a battery module improving cooling performance includes grommets(32) and a grommet connection part(33). The grommets are inserted at both ends and a central part of respective module. The grommet connection part is integrally formed to connect the interval of the neighboring grommets and is formed to contact the inner side with the module surface.
Patent KR-20090020340-A (KR)
Inventor: YEOM KEUN CHUL
IPC: B60G7/00
Filed: 2007-08-23
Abstract: An assist arm structure in a vehicle is provided to prevent fire due to leakage of fuel by reducing damage to a fuel take by a trailing arm. An assist arm structure in vehicle comprises a first assist arm(10) whose one end is connected to wheels and a second assist arm(11) flexibly connected to a vehicle body. The second assist arm is connected by a mounting bracket in the vehicle body. One end of the second assist arm is inserted into the first assist arm. A protrusion(11b) of T-shape is formed in the second assist arm. The protrusion is connected by the first arm and a spring(12), fitted into the first assist arm.
Patent KR-20090020810-A (KR)
Title: Fuel tank mounting support structure in vehicle
Inventor: KIM JUNG HAN
IPC: B60K15/03
Filed: 2007-08-24
Abstract: A fuel tank mounting support structure in a vehicle is provided to improve endurance of a rear floor panel by preventing fracture due to stress concentration on a welding part of a supportive block. A fuel tank mounting support structure in a vehicle comprises a mounting bracket mounting a fuel tank to a rear floor panel; and a first and second support blocks(12a,12b) to which the mounting bracket is attached through a hinge pin(12c). The first support block is attached to the rear floor panel. The second support block is attached to the rear cross member. The first and the second support block are combined in order to form a box type. A flange attached to the rear floor panel is formed on the top of the first support block. The flange(12ba) attached to the rear cross member is formed on the top of the second support block.
Patent KR-20090021895-A (KR)
Title: Apparatus and method for wireless controlling portable terminal
Inventor: KIM MIN SUNG
IPC: H04B1/40
Filed: 2007-08-28
Abstract: A radio control method of a portable terminal and an apparatus thereof capable of manipulating a user interface of the portable terminal are provided to be wirelessly controlled in the conducting method and the apparatus of the portable terminal by using an operation sensor. An operating sensor unit(110) is activated and deactivated by the control of a control unit(140). The action sensor part comprises the sensor measuring the movement of the user. The action sensor part measures the speed information of the operation of user and direction. A controller near field communication unit(130) is activated or deactivated by the control of controller. The control signal generated in controller is transmitted with the portable terminal. The controller can produce the speed information and the control signal corresponding to direction of the customer service from the movement value which is input from the action sensor part.
Patent KR-20080048386-A (KR)
Title: Apparatus and method for playing multimedia file
Inventor: YANG GYUNG HYE
IPC: G11B19/02
Filed: 2007-09-03
Abstract: An apparatus and a method for playing multimedia file are provided to check preference/non-preference with respect to multimedia file based on a feeling response index of a user in order to play the preferred multimedia file repeatedly and skip the non-preferred multimedia file. An apparatus for playing multimedia file comprises a feeling response index calculating part(120), a preference/non-preference check part(130), a list generating part(150), a play management part(160), a tag management part(140), a control part(190), and a transmitting and receiving part(180). The feeling response index calculating part calculates a feeling response index based on the body response of a user. The preference/non-preference check part checks preference/non-preference of the user with respect to the audio file based on the calculated feeling response index. The list generating part generates an audio file list preferred by the user. The play management part controls play of the audio file based on the preference/non-preference and plays the audio file according to the audio file list.
Patent KR-20090028049-A (KR)
Title: 연료 절감 용기
Inventor: LIM SEO HYUN
IPC: A47J27/00
Filed: 2007-09-13
Abstract: 본 발명은 연료 절감 용기에 관한 것으로서, 보다 상세하게는 식당이나 급식 시설 등에서 사용되는 곰솥, 국솥 등의 대형 주방용기에 일체형 또는 분리형으로 결합되어 조리시 가스렌지의 화력을 보다 효율적으로 집중시킬 수 있음과 동시에 화력의 역류를 방지함으로써 열 손실을 극소화시켜 연료를 절감할 수 있는 연료 절감 용기에 관한 것이다. 
     본 발명은 음식물을 조리하기 위한 주방용기가 상부에 설치되고, 내부에 수용부를 갖는 몸체부와, 상기 몸체부의 저면 중앙에 상향 돌출되도록 형성되는 화기유입구로 구성된 것을 특징으로 한다. 
       
     주방용기, 연료절감, 화기유입구, 곰솥, 잔열배출공
Patent KR-20090030374-A (KR)
Title: Apparatus for processing substrates
Inventor: KIM DAE HUN
IPC: H01L21/304
Filed: 2007-09-20
Abstract: An apparatus for processing a substrates is provided to prevent contamination due to different chemical used for different process bath by isolating a first and a second transferring unit. In an apparatus for processing a substrates, a load stock includes a cassette(20) including a substrate(10) for manufacturing a semiconductor device. The load stock is classified into a loading area, an unloading region, and a storage area between them. A first transferring unit is arranged to face the load stock and transfers the cassette from the load stock. A second transferring unit(300) transfers the transferred cassette, and a process bath(400) processes the surface of the substrate transferred by the second transferring unit. A barrier wall portion(800) is arranged between a third and a fourth transferring unit. The barrier wall portion isolates a first chemical filled with the first process bath and a second chemical filled with the second process bath.
Patent KR-20090030566-A (KR)
Title: Shell-and-tube heat exchanger type reactor and method of producing unsaturated aldehyde and/or unsaturated fatty acid using the same
Inventor: KIM DUK KI
IPC: B01J8/06
Filed: 2007-09-20
Abstract: A shell-and-tube heat exchange type reactor is provided to enable a user to use a catalyst steadily for a long time and get unsaturated aldehyde and/or unsaturated fatty acids with a high yield. A shell-and-tube heat exchange type reactor comprises one or more structure reaction tubes(4) and one or more catalytic reaction tubes. The structure reaction tubes having a structure inside are filled with a catalyst(3). The catalytic reaction tubes are filled with the catalyst. The structure located in the structure reaction tube includes an inlet, an outlet, a preheating layer(1), and a space layer(2).
Patent KR-20090035163-A (KR)
Title: Method and system for providing advertisement in digital broadcasting
Inventor: LEE JI YOUNG
IPC: H04N5/445
Filed: 2007-10-05
Abstract: A method and a system for supporting advertisement suitable for the preference of a user in digital broadcast are provided to offer various advertisement through a program guide. A video source generating unit(206) for a program guide processes the delivered video signal. A plurality of sub videos for advertisement and the broadcasting program canning be offered is produced. A source encoding unit(208) encodes a video source for a program guide according to an algorithm. The broadcasting reception terminal outputs the program guide including the advertisement sub video of the video source for the program guide according to the set up condition.
Patent KR-20080034077-A (KR)
Title: Nozzle and substrate processing apparatus including the same
Inventor: OSADA NAOYUKI
IPC: H01L21/304
Filed: 2007-10-08
Abstract: A nozzle and a substrate processing apparatus including the same are provided to restrain electric discharge from an electrified process liquid by installing a conductive metal tube to surround a resin tube flowing the process liquid. A nozzle(60a,60b,60c) is supported by a predetermined support member, and supplies a process liquid into a substrate. A first resin tube(92), in which the process liquid is flowed through, comprises an outlet for discharging the process liquid at an end portion, and is composed of a specified resin substance. A metal tube(91) is made of a predetermined metal substance, and is installed to surround the outside circumference of the first resin tube.
Patent KR-20090039196-A (KR)
Title: Non-aqueous electrolyte solution for lithium secondary battery and lithium secondary battery comprising the same
Inventor: KIM SUN YOUNG
IPC: H01M10/0569
Filed: 2007-10-17
Abstract: A non-aqueous electrolyte solution is provided to improve the high-temperature stability of solid electrolyte interface and to prevent the elution of transition metal in a positive electrode. A non-aqueous electrolyte solution including lithium salt and organic solvent comprises as additives, 0.1~5 parts by weight of a sultone-based compound having a carbon-carbon unsaturated bond, 0.1~5 parts by weight of a cyclic carbonate compound having a vinyl group, and 0.1~5 parts by weight of a dinitrile-based compound based on 100.0 parts by weight of the non-aqueous electrolyte solution.
Patent KR-20090044185-A (KR)
Inventor: JANG IN SUNG
IPC: F28D7/00
Filed: 2007-10-31
Abstract: 열교환 장치가 개시된다. 그러한 열교환 장치는 일측에 제1 유입구가 연결되어 유체가 유입되며, 상기 유체에 열교환이 이루어진 후 타측에 연결된 제1 배출구를 통하여 유체가 배출되는 쉘과, 상기 쉘의 내측에 길이방향으로 배치됨으로써 유로를 형성하는 적어도 하나 이상의 베플과, 상기 쉘의 내측에 배치되며, 내부에 유체가 흐름으로써, 상기 유체가 상기 쉘의 내부를 흐르는 유체와 열교환이 이루어지는 복수개의 전열관과, 그리고 상기 복수개의 전열관에 구비되어 유체간의 열교환을 활성화시키는 히트 파이프를 포함한다. 
       
     열, 교환, 전열관, 쉘, 베플, 파이프, 헤더
Patent KR-20090046492-A (KR)
Inventor: JANG SUNG KWEON
IPC: F01M1/16
Filed: 2007-11-06
Abstract: 본 발명은 실린더 블록의 상부에 장착홈을 통하여 설치하여 엔진 회전수에 따라 실린더 헤드로 공급되는 오일의 유면 높이를 일정하게 유지시키도록 하여 엔진의 저속 회전 시에도 연소실의 냉각효과 및 윤활성을 증대시킬 수 있도록 하는 실린더 헤드용 오일유면 제어장치를 제공한다. 
       
     실린더 헤드, 실린더 블록, 오일, 오일유면 제어장치
Patent KR-20090048772-A (KR)
Inventor: BOK HYUN HO
IPC: B30B15/30
Filed: 2007-11-12
Abstract: 본 발명은 금속판재 프레스 성형 가공 시, 가공성을 향상시키기 위해 특별히 창안된 프레스 성형 방법과 그 장치를 제공한다. 프레스 성형 시, 금속판재가 다이의 내부로 유입될 때, 다이와 독립적으로 구성되어 특정한 방향으로 이동할 수 있는 상부 및 하부 바인더가 금속판재와 함께 적절한 저항력으로 수평 방향으로 유입하여 가공중인 금속판재에 최적의 인장력을 부여하고 금속판재의 두께 감소율이 특정 부위에 집중되는 것을 방지하여 변형영역 전체에 변형률을 고르게 분포시켜 형상이 깊고 복잡한 부품의 가공을 가능하게 한다. 
       
     이동식 바인더(moving binder), 바인더 유입량 조절, 프레스 성형
Patent KR-20090050528-A (KR)
Inventor: JEONG DONG HYEON
IPC: E06B7/082
Filed: 2007-11-16
Abstract: 본 발명은 태양열 집열관을 건축물의 수직 외벽에 설치할 수 있도록 만든 갤러리 창호에 관한 것이다.본 발명에 따른 갤러리 창호 는 수평으로 설치된 갤러리 판 상부에 태양열 집열관을 결합시켜 태양 고도인 25도에서 45도 사이에 맞추어 설치함으로 서 건물 자체적으로 온수를 생산하여 에너지 소비와 환경오염을 줄일 수 있다는 특징을 가지고 있다 
       
     축열 탱크
Patent KR-20090051388-A (KR)
Inventor: SONG JONG YOUNG
IPC: E01D21/00
Filed: 2007-11-19
Abstract: 본 발명은 건설, 토목 분야에 관한 것으로서, 특히 사람이나 차량 등이 하천,호수,해협,만,운하 등을 건너갈 수 있도록 해상 위에 만든 고가구조물인 해상교량에 관한 것이다. 특히 본 발명은 해상에 시공되는 기초 구조물과; 상기 기초 구조물의 위에 설치되고, 방호벽을 갖는 상부 구조물과; 상기 상부 구조물의 방호벽 바깥쪽에 청정에너지원을 이용하여 전력을 발전하는 발전설비가 설치될 수 있도록 구비된 발전설비 설치부를 포함함으로써, 친환경적인 방법으로 전력 공급을 위한 초기 시설 비용 및 유지,관리 비용을 절감할 수 있고, 관광 자원화될 수 있고, 자연학습장이 될 수 있는 해상교량을 개시한다. 
       
     해상교량, 상부 구조물, 기초 구조물, 발전설비, 풍력발전
Patent KR-20090051650-A (KR)
Inventor: LEE JEONG HO
IPC: H01L27/146
Filed: 2007-11-19
Abstract: 이미지 센서의 제조 방법이 제공된다. 상기 이미지 센서의 제조 방법은 기판에 광전 변환 소자를 형성하고, 광전 변환 소자가 형성된 기판 상에 절연막 구조체를 형성하되, 절연막 구조체는 다층의 층간 절연막과, 다층의 층간 절연막 사이에 배치된 다층의 금속 배선을 포함하고, 광전 변환 소자 상에, 다층의 층간 절연막을 관통하는 캐버티(cavity)를 형성하고, 캐버티가 형성된 기판을 열처리하는 것을 포함한다. 
       
     이미지 센서, 캐버티, 열처리, UV 처리
Patent KR-20090052429-A (KR)
Inventor: JANG SUNG SOON
IPC: G08B31/00
Filed: 2007-11-21
Abstract: 본 발명은 방호시설에 구비되는 물리적 방호 시스템의 유효성 평가방법에 관한 것으로서, 더욱 상세하게는 방호시설의 정확한 위치정보를 반영하여 벡터모델을 수립하고, 이를 타일맵(tile map)으로 변환하여 취약경로를 탐색하는 동시에, 각각의 방호시설이 전체 방호시스템에 미치는 민감도를 산출해 낼 수 있는 물리적 방호 시스템의 유효성 평가방법에 관한 것이다. 
     이를 위하여 본 발명은, 사용자로부터 방호시설의 시설자료에 대한 벡터모델 정보를 입력받는 단계와, 상기 입력된 벡터모델 정보에 따라 벡터모델을 맵에 생성한 뒤 상기 맵을 일정한 크기로 타일화한 타일맵(tile map)으로 변환시키는 단계와, 상기 타일맵에서 휴리스틱(heuristic) 탐색방법을 사용하여 방호시설의 취약경로를 탐색하는 단계와, 상기 탐색된 취약경로에 대한 저지확률을 계산하는 단계와, 상기 탐색된 취약경로 및 저지확률을 출력하는 단계를 제공한다. 
       
     방호시설, 벡터모델, 타일맵, 민감도, 취약경로, 휴리스틱, 유효성 평가
Patent KR-20090056288-A (KR)
Title: The head of heatpipe
Inventor: KIM KYEONG SEOP
IPC: F28F9/10
Filed: 2007-11-30
Abstract: A head of a radiator heat pipe is provided to obtain stable heating effect by screwing a first head and plurality of second head and coupling selected heat pipes to each other. A head of a radiator heat pipe is made of first and second head(10,20) which are connected to each other. The first head is made of a flange part(12), a cylindrical body(13) and a circular coupling part(15). The flange part has the screw part(11). The cylindrical body is connected to the flange part in a direction at a right angle and has a coupling part(40) for a heat pipe(50) on the upper end. The circular coupling part is connected to the cylindrical body at the other side of the flange and has the screw part(14) on the outer circumference. The second head has the same structure as the first head excluding that a flange part(22) is shorter than the flange part of the first head. The heat pipe is supplied with the heating source through the organic bond between a plurality of second heads and the first head. The heat pipe is adamantly screwed in the coupling part of the first and second heads through a washer(45), and an O-ring(44) and a coupling lid(49).
Patent KR-20090056333-A (KR)
Title: Image sensor and method for manufacturing the sensor
Inventor: SHIN JONG HUN
IPC: H01L27/146
Filed: 2007-11-30
Abstract: An image sensor and a method for manufacturing the sensor are provided to prevent plasma damage and improve product yield and resolution by controlling the thickness of the remaining oxide film. A gate(104) is formed on a semiconductor substrate(100), and a plurality of insulating layers are deposited on the whole semiconductor substrate including the gate in order. The topmost one of a plurality of insulating layers is removed by a dry-etching so that a spacer is formed at the side of the gate. The bottommost one of a plurality of insulating layers is stayed on the whole of the semiconductor substrate and the other are removed by a wet-etch.
Patent KR-20090057487-A (KR)
Title: Manufacturing method of a device of the semiconductor using amorphous carbon layer for hardmask
Inventor: NOH HYUNG WOOK
IPC: H01L21/205
Filed: 2007-12-03
Abstract: A manufacturing method of a device of a semiconductor using an amorphous carbon layer for a hard mask are provided to control property of the amorphous carbon easily by making the amorphous carbon layer of a neo-hexane compound. A manufacturing method of a device of a semiconductor using an amorphous carbon layer is comprised of the steps: a conductive layer or an oxide layer is formed on the semiconductor substrate(S110); a hard mask is formed on the conductive layer or the oxide layer (S120); a resist layer is deposited on a hard mask and it is patterned (S130); a hard mask is etched (S140); The conductive layer or the oxide layer is etched (S150); and remaining hard mask is removed(S160).
Patent KR-20090057524-A (KR)
Title: Cooling device of transfer shaft for machine tool
Inventor: LEE GYEONG JO
IPC: B23Q11/12
Filed: 2007-12-03
Abstract: A cooling device of a transfer shaft for a machine tool is provided to prevent thermal deformation of a transfer shaft by turning an impeller member according to the rotation of the transfer shaft, and thus circulating the air forcedly. A cooling device of a transfer shaft for a machine tool comprises a transfer shaft(32) arranged inside a stator(20) and turning around it; a transfer member(41) screw-joined to the transfer shaft and moving rectilinearly; a moving body, fastened on the transfer member, sliding on the stator; and an impeller member(60), attached onto the transfer shaft, forcedly circulating the air, rotating with the transfer shaft.
Patent KR-20080055639-A (KR)
Title: A porous metering member with a coating
Inventor: HABIBI NAINI SASAN
IPC: B29C31/06
Filed: 2007-12-03
Abstract: A coated porous metering device is provided to employ a metering member to measure information about a media in a gas, viscous, or paste state. A metering device(1) includes a metering unit(2) and a base member(3) having fluid or gas transmittance. The metering device includes a first surface(4), a second surface(6), and a jacket surface(8). The first surface is in the contact with an introducing passage(5) for fluid or gas. The second surface comes in contact with a passage(7) through which a media in a viscous state or a paste state passes. The jacket surface has a shape partially identical to that of a metering unit receiving recess(9). The metering unit is fixed into the base member to form a fluid transmitting unit(13).
Patent KR-20090058397-A (KR)
Title: System and method for monitoring head end cable modem in cable network
Inventor: KIM TAE KYOON
IPC: H04L12/26
Filed: 2007-12-04
Abstract: A system and a method for monitoring a head end cable modem in a cable network are provided to suggest a new shape management message, thereby setting and inquiring shape information or state information of the head end cable modem. A shape management message is generated(S740). The shape management message comprises shape information for controlling channel bonding of a head end cable modem or state information of the shape information. The shape management message is transmitted to the head end cable modem(S750). The shape management message including response information to the shape management message is received from the head end cable modem(S760).
Patent KR-20090058822-A (KR)
Title: Display apparatus for 3-dimensional image and method thereof
Inventor: SEONG HWA SEOK
IPC: G09G3/28
Filed: 2007-12-05
Abstract: A display device and a display method about a 3D image are provided to realize an excellent continuous tone without generating a dual image, thus a user can receive a 3D image with a superior picture quality. An image separator(121) separates a 3D image signal into a first image signal and a second image signal in every field unit, and separates at least one of the first and second image signals into plural sub fields. A controller(150) divides the plural sub fields according to weighted values, and controls so that sub fields with small brightness weighted values and sub fields with large brightness weighted values are arrayed in turns. The controller controls so that the sub fields with the small brightness weighted values are arrayed in order of the brightness weighted values getting bigger.
Patent KR-20080052495-A (KR)
Title: Pressure switch
Inventor: KAWAKAMI HIROSHI
IPC: H01H35/00
Filed: 2007-12-07
Abstract: A pressure switch is provided to facilitate replacement of a joint coupling by detachably coupling the joint coupling with a joint coupling holder through a connecting pin. A pressure switch includes a housing(12), a detector(16), an adapter(18), a joint coupling(20), and a wall unit(68). The housing has a first passage(36) of pressure fluid. The detector is received inside the housing to face the first passage and detects pressure of the pressure fluid. The adapter is mounted to the housing and has a second passage(42) connected with the first passage. The second passage is arranged on the same axis as the first passage. The joint coupling is detachably coupled with the adapter and connected to a pipe supplied with the pressure fluid. The wall unit is arranged on the axis of the first and second passages to regulate a flow of the pressure fluid to the detector.
Patent KR-20090066343-A (KR)
Title: 책받침대 내장형 책상
Inventor: PARK EUI YOUNG
IPC: A47B23/00
Filed: 2007-12-19
Abstract: 책상에 책받침대를 부착해 책을 쉽고 편하게 볼 수 있도록한다. 
       
     책상, 책받침대
Patent KR-20090066608-A (KR)
Inventor: KIM HEE JUN
IPC: G06F17/30
Filed: 2007-12-20
Abstract: A multimedia content searching method and a system thereof for performing corresponding multimedia contents and the search having the high correlation are provided to improve the search accuracy of the multimedia contents by linking an annotation as the search base data of multimedia. Additional information generated in a referring location by visiting the address of referring location(S205, S206). A contents exposure keyword is determined through commonness and similarity determination by extracting keywords from the collected information(S208). A multimedia contents search service is provided by configuring a search index according to the collected information and the contents exposure keyword(S209, S210).
Patent KR-20090067698-A (KR)
Title: Method for fabricating iron-based powdered cores
Inventor: KIM SANG WON
IPC: B22F3/02
Filed: 2007-12-21
Abstract: A method for fabricating iron-based powdered cores is provided to fabricate iron-based powdered cores with high magnetic properties by using abandoned debris generated from roll surface polishing, thereby utilizing waste sources. A method for fabricating iron-based powdered cores includes the steps of preparing pure iron powder graded to 150~250mum and the roll surface abrasive debris graded less than 150mum, preparing mixture raw powder by mixing the pure iron powder the abrasive debris of 3~30wt% with respect to the weight of a core to be fabricated, dipping the mixture powder into a coupling agent to coat the mixture powder therewith, mixing the surface-treated mixture powder with a binder and a curing agent of 0.1~1wt% with respect to the weight of the core and preparing a mold core by single pressure type vertical pressure of 10~15 ton/cm^2, and curing the mold core at 100~200°C for 0.5~2 hours.