baber/WOPTO huggingface dataset:
Patent KR-20000022081-A (KR)
Title: Apparatus for reading or writing optical recording carriers
Inventor: BUECHLER CHRISTIAN
IPC: G11B7/09
Filed: 1997-06-23
Abstract: PURPOSE: An apparatus for reading or writing optical recording carriers is provided to control both delay elements and the time of delay elements and to apply the unification of output to a phase detector. CONSTITUTION: A light source(1) generates light beam and transmits it to optical recording carriers (4). An object lens(3) forms a focus on the optical recording carriers(4) through concentrating the light beam. And then, tracking signal(TS) is transmitted to a drive(6), and the output signals from region(A,B,C,D) are transmitted to delay members(7,8,9,10) exposed between the photo detector(5) and phase detector(14), which include delay times that can be variably set. The delay members output the delayed signals(A,B,C,D), and the delayed signals are transmitted to a circuit arrangement and the two outputs(12,13) from the circuit arrangement are transmitted to phase detector. The apparatus according to this invention is used as a playback or recording apparatus for optical recording carriers, such as CDs, CD-ROMs, CD-Is, CD-Rs, DVDs, DVD-ROMs, DVD-Rs, etc.
Patent KR-20000022338-A (KR)
Title: Hot-water extract of nemacystis decipiens and use thereof
Inventor: SATO TAKAYA
IPC: A61K31/715
Filed: 1997-06-24
Abstract: PURPOSE: A hot-water extract of a seaweed of the family Spermatochnaceae and use thereof and provided. CONSTITUTION: A hot-water extract of Nemacystis decipiens having a molecular weight of not less than 30,000 absorbs sodium ions in the digestive tract and promotes excretion thereof, and therefore foods and pharmaceuticals containing the same are useful for prophylaxis and treatment of diseases attributable to excessive ingestion of salt. The hot-water extract of Nemacystis decipiens has a weight-average molecular weight of 50000 to 500000, a neutral sugar content of 50 to 90% and a sulfur content of 3 to 17%.
Patent KR-20000050907-A (KR)
Inventor: KIM JUNG YEUP
IPC: C08G61/12
Filed: 1999-01-15
Abstract: PURPOSE: A luminescent material containing a new light emissive group and electro-luminescent device using the same are provided which produce luminescent diode showing high light efficiency. CONSTITUTION: A process is characterized in that a diacetylene polymer which contains a light emissive group of the following formula 1 and can be blended with various general polymers, so it is used as a luminescent material for preparing an electro-luminescent device. The electro-luminescent device comprises an anode/a luminescent layer/a cathode, or if necessary, a transfer layer and/or a reflecting layer using the polymer. The polymer is expected to be useful as an LED, a light activated switch, a module, a wave guide, a transistor, a laser, and a light absorption body, or a polymeric separation membrane.
Patent KR-19990067952-A (KR)
Title: 컴바인드 사이클 발전 플랜트
IPC: F02C7/224
Filed: 1999-01-18
Abstract: 본 발명은 연소기와,  연소기로부터의 고온 연소 가스를 팽창시켜 발전을 일으키는 가스 터빈과,  가스 터빈으로부터 배출된 배가스에 의해 급수를 가열하여 증기를 발생시키는 배열 회수 보일러와,  배열 회수 보일러로부터 공급된 증기를 팽창시켜 발전을 일으키는 증기 터빈을 포함한 컴바인드 사이클 발전 플랜트에 관한 것이다.  배열 회수 보일러는 각각 다른 압력 증기를 발생하는 절탄기,  드럼,  증발기 및 과열기를 각각 포함한 고압,  중압 및 저압 계통으로 구성되어 있다.  급수는 고압,  중압 및 저압 계통의 절탄기로 보내서 가스 터빈으로부터의 배가스에 의해 가열되어 각 압력 계통 내의 드럼으로 공급된다.  컴바인드 사이클 발전 플랜트는 연소기의 연료 계통 중에,  연소기로 공급되는 연료를 가열하는 연료 가열 계통을 더 포함한다.
Patent KR-19990068171-A (KR)
Title: 폴리부틸렌 테레프탈레이트 배리어층을 함유하는 다층 복합 플라스틱 재료
IPC: C08L67/02
Filed: 1999-01-27
Abstract: 층의 총 중량을 기준으로 90 중량% 이상의 에틸렌 단독중합체 또는 공중합체 로 이루어진 하나 이상의 층 (A), 실질적으로 폴리부틸렌 테레프탈레이트로 이루어진 하나 이상의 배리어층 (B) 및 바람직한 경우, 이러한 층 사이의 접착을 증진시키는 접착 증진제층 (C)를 포함하는 다층 복합 플라스틱 재료.
Patent KR-20000055409-A (KR)
Inventor: PARK JEONG HEUM
IPC: F25B1/00
Filed: 1999-02-05
Abstract: PURPOSE: A control method of a coolant amount in an air conditioner is provided to sense and eliminate the damage to a compressor caused by the shortage or excess of the coolant amount or the use inconvenience of a consumer. CONSTITUTION: A test operation key signal is fed from a test operation key signal input unit(22). An indoor temperature sensing unit(21) senses an indoor temperature and transmits the sensed temperature value to a control unit(28) of an outdoor unit. The control unit(28) decides what amount of frequency is established so the pressure of a service valve(27) on a low pressure side as to be a regulative pressure by taking the indoor/outdoor temperatures. The control unit controls the operation of a compressor at the decided frequency. When the high pressure from the compressor is too high or the pressure from an evaporator is too low, high and low pressure service valves(26,27) are acted. Thereby, an electric circuit is blocked and the compressor is stopped.
Patent KR-20000056800-A (KR)
Inventor: AHN BYUNG HA
IPC: F04C23/00
Filed: 1999-02-26
Abstract: PURPOSE: A structure for discharging refrigerant of a rotary compressor is provided to reduce noise due to pressure pulsation components of refrigerant and to reduce eccentric load or eccentric force by appropriate combination of discharge holes by forming a refrigerant discharge hole on a hollow rotary shaft in communication with a main bearing discharge hole without forming any additional discharge hole on a muffler. CONSTITUTION: A structure for discharging refrigerant of a rotary compressor includes a hollow rotary shaft(60) connected to a discharge pipe(85) and formed with a refrigerant discharge hole(62) positioned inside a muffler(80) in communication with a discharge hole of a main bearing(71) for supporting an upper portion of a compression part(65a). A lubricating part(63) performing a lubricating function by oil of an oil-refrigerant mixture is formed in a predetermined space between the refrigerant discharge hole of the rotary shaft and the discharge hole of the main bearing. The discharge holes of the rotary shaft and main bearing have at least one or more holes arranged to reduce the eccentric load or the eccentric force of the rotary shaft.
Patent KR-20000063718-A (KR)
Title: 알칼리성 수용액 및 이의 셀룰로우즈 직물의 염색공정에의 용도
IPC: D06P1/673
Filed: 1999-03-02
Abstract: 본 발명은 알칼리성 수용액 및 이를 셀룰로우즈 직물의 염색공정에 사용하기 위한 용도에 관한 것이다. 
     셀룰로우즈 직물을 염색하기 위한 섬유-반응성 염료의 알칼리성 염색 욕, 특히 패딩 염료액을 제조하는데 유용한 것으로 수산화나트륨 및 탄산칼륨을 1:1.7 내지 1:0.5의 몰비로 포함하는 수용액이 개시된다.
Patent KR-20000059728-A (KR)
Inventor: JANG HAK JEON
IPC: C08F257/02
Filed: 1999-03-08
Abstract: PURPOSE: A styrene class graft copolymer is provided which grafts more than one monomer with unsaturated radical on syndiotactic polystyrene. CONSTITUTION: The production process of styrene class graft copolymer is followed by the steps of: (i) mixing catalyst class which comprises a transition metal compound as a main catalyst component and organic aluminum compound or aluminoxane as an assistant catalyst component with an aromatic monomer to produce a syndiotactic cubic regulative styrene class polymer including a repetition unit shown in (A); and (ii) polymerizing a monomer shown in (B) including unsaturated radical with the produced syndiotactic cubic regulative styrene class polymer to produce the styrene class graft copolymer.
Patent KR-20000060509-A (KR)
Inventor: NOH SANG HA
IPC: G01J3/46
Filed: 1999-03-16
Abstract: PURPOSE: A method for sorting color and external shape of fruit is provided to sort the quality grade of fruit automatically, by photographing the fruit and by judging color and external shape of the fruit according to the result. CONSTITUTION: A method for sorting color and external shape of fruit is composed of the steps;determining the quality grade according to color and external shape of fruit and switching automatic sorting machine(not shown) to mode for establishing the value(a*) among the reference color coordinate(L*a*b*)(S100);establishing the value(a*) among the reference color coordinate(L*a*b*) by picture signal of the standard color paper(not shown) and storing to computer(not shown)(S200);analyzing the picture signal photographed by camera(not shown) and judging whether the fruit is placed on fruit dish of automatic sorting machine(S300);comparing the picture signal of fruit on fruit dish with the value(a*) of the reference color coordinate(L*a*b*) and judging the quality grade(first grade to third grade and off-grade)(S400);calculating the length and width of fruit from picture signal by, using chain code way and judging whether the external shape of fruit is abnormal(S500);and determining the quality grade of fruit(S600).
Patent KR-20000061789-A (KR)
Inventor: PARK NHO CHANG
IPC: B44C5/02
Filed: 1999-03-31
Abstract: PURPOSE: A photo attached to the stone which is coated after being drawn a picture to be matched for the environment of the photo is provided. The photo and the stone can be appreciated at the same time and kept permanently. CONSTITUTION: A photo attached to the stone is produced as following steps: attaching a photo(2) to a stone(1) followed by grinding after treating with a plaster to the edges of the photo(2) not to be graded; drawing a picture onto the stone to be matched with the photo(2); and coating the whole stone(1).
Patent KR-20000066241-A (KR)
Inventor: YOON EUN JUNG
IPC: F16L55/045
Filed: 1999-04-14
Abstract: PURPOSE: A device for preventing water hammering is provided to buffer impact well with a simple structure. CONSTITUTION: A U-shaped piston(5) is held in a pressure chamber(C) of a body(1). The piston is elastically biased in the opposite direction to a head and hung on a shoulder(4) not to be separated from the body. The piston forms plural sills(5a) to prevent a vapor leakage from the pressure chamber by one or many O-rings. In a neck side(3), a joint connects the channels of a pipe by a brazing junction. Therefore, a water hammer arrester is used semi-permanently with a simple structure by composing the body of a corrosion resistant metal and the piston of a corrosion resistant metal or plastics.
Patent KR-20000067580-A (KR)
Inventor: KIM HYEONG TAE
IPC: G08G1/095
Filed: 1999-04-29
Abstract: PURPOSE: A traffic signal lamp is provided to lengthen useful life of lamp, and to reduce electric power consumption and weight of the traffic signal system. CONSTITUTION: A lamp comprises an electric connection portion(23) coupled to a bulb insertion socket of a traffic signal system, a switching mode power supply module(22) for high-speed switching and converting an AC voltage input to the electric connection portion, and generating a DC voltage, and a display portion(21) constituted by a light emitting diode array and which emits light by the AC voltage output from the switching mode power supply module.
Patent KR-20000073242-A (KR)
Inventor: YOO DAE GEUN
IPC: C07C51/41
Filed: 1999-05-07
Abstract: PURPOSE: A process of preparing the subject compound suitable for a lubricator and a lubricating agent in various formulations such as tablets, capsules and creams of medicines is provided which produces high purity medical magnesium stearate at low cost in high yields. CONSTITUTION: The medical magnesium stearate is prepared by reaction of stearic acid with 10 to 20% sodium hydroxide aqueous solution at 60 to 80°C and reacting the reactant with 10 to 20% sulfuric acid aqueous solution. The obtained magnesium stearate is hard fine powder, excellent in lubricating properties and suitable for a base material of medicines.
Patent KR-19990088375-A (KR)
IPC: H01L21/336
Filed: 1999-05-19
Abstract: 이온빔의 조사에 의한 기재의 손상을 방지하여 기재의 성막면에 양호한 박막을 형성하는 것을 과제로 한다. 
     이를 해결하기 위한 수단으로 성막이 형성되는 기재(17)가 배치되는 성막실(13)로서의 진공용기(12)와, 진공용기(12)내에 도입된 원료가스를 플라즈마화하여 분해하고, 진공용기(12)내 기재(17)의 성막면 근방에 원료가스의 플라즈마(26)를 생성하는 플라즈마 생성수단과, 진공용기(12) 주위에 마련되어 기재(17)의 성막면에 평행하게 또는 경사지게 인출된 이온빔(31)이 플라즈마(26)를 조사하는 이온원(29)을 갖추고 있다.
Patent KR-20000074513-A (KR)
Inventor: LEE HUI TAE
IPC: H01L21/68
Filed: 1999-05-21
Abstract: PURPOSE: A jig for preventing a wafer from being scratched or broken is provided to stably enable an operator to handle the wafer, by establishing a jig for loading/unloading the wafer to/from a cassette. CONSTITUTION: A jig for preventing a wafer from being scratched and broken comprises a rectangular frame and a slit. The rectangular frame has right/left surfaces, top/bottom surfaces and front/rear surfaces that are open. The slit is connected to the frame as one body, and is extended along a side central portion of the right/left surfaces. The extended surface has a predetermined line width, and is disposed toward the inside of the frame.
Patent KR-19990088516-A (KR)
Title: 반도체장치의제조방법
IPC: H01L29/732
Filed: 1999-05-24
Abstract: 본 발명은 PNP 형성공정의 일부를 NPN 형성공정과 공용할 수 있는 반도체장치의 제조방법에 관한 것으로서, NPN 컬렉터영역(4)의 형성과 동시에, N형 불순물주입에 의해 형성된 PNP의 측면분리영역(5)으로 분리된 영역 내에서, PNP의 N형 저면분리영역(8), 컬렉터영역(9) 및 베이스영역(10)을 형성하는 공정은 동일한 마스크를 이용하여 행해진다. PNP 및 NPN의 에미터 전극(16,15)을 패터닝 형성할 때의 오버 에칭에 의해 컬렉터영역(9,4)까지 도달하는 트렌치(18,17)를 형성하여, PNP의 외부베이스영역(20)을 형성하는 동시에 트렌치(17)를 사이에 세워 N형 불순물을 주입하여 NPN의 컬렉터 인출영역(21)을 형성하여, NPN의 외부베이스영역(19)을 형성하는 동시에 트렌치(18)를 사이에 세워 P형 불순물을 주입하여 PNP의 컬렉터 인출영역(22)을 형성한다.
Patent KR-19990088595-A (KR)
Title: 건설기계의엔진회전수제어장치
IPC: F04B49/00
Filed: 1999-05-27
Abstract: 본 발명은 오토 아이들(auto idle) 제어와 그 해제를 실현할 수 있는 동시에 주행 독립성을 확보할 수 있는 건설 기계의 엔진 회전수 제어 장치를 제공한다. 
     메인 펌프(2, 3, 4)와, 주행용 방향 제어 밸브(5, 9)의 입력 포트 끼리를 접속하는 연락 관로(15)와, 이 연락 관로(15)에 설치한 주행 연통 밸브(16)를 가지는 유압 회로에 있어서, 배관(配管)(18) 중에 설치되고 주행에 관련되는 파일럿 밸브(5a, 9a)와, 배관(19) 중에 설치되고 붐(boom) 등에 관련되는 파일럿 밸브(pilot valve)(6a, 7a, 8a, 10a)와, 배관(22) 중에 설치되고 선회, 배토(排土) 등에 관련되는 파일럿 밸브(12a, 13a, 14a)와, 배관(18, 19)의 압(壓)을 검출하는 압력 검출 장치(21)와, 배관(22)의 압을 검출하는 압력 검출 장치(23)와, 압력 검출 장치(21, 23)의 신호에 따라 오토 아이들 제어 및 그 해제를 실시하는 엔진 제어 장치(24)와, 배관(19)의 압에 따라 주행 연통 밸브(16)를 연통 위치로 전환하는 신호를 안내하는 신호 관로(26)를 구비한다.
Patent KR-20000005883-A (KR)
Inventor: BOK SUNG HAE
IPC: A23L33/00
Filed: 1999-06-03
Abstract: PURPOSE: A food composition for the health promotion is provided to show the remarkable effect in preventing the arteriosclerosis and improving the liver function. CONSTITUTION: The food composition for the health promotion includes the material obtained from the selected orange peel at the weight ratio of one to one or 1,000 to one from the group consisting of ginseng, flavonoid obtained from orange peel, extract of orange peel and the mixture of these ingredients.
Patent KR-20010002458-A (KR)
Inventor: HWANG GYO HYEON
IPC: C08F4/64
Filed: 1999-06-15
Abstract: PURPOSE: A process of preparing an ethylene polymer and a copolymer of ethylene and α-olefin having a molecular weight distribution containing a bimodal form or polymer tails in a gas phase by preparing a prepolymer using dimethylaluminum chloride and an electron donor as a main catalyst and cocatalyst used in a gas phase polymerization and carrying out polymerization using the prepolymer is provided, which has an effect on effectively producing (co)polymers having a bimodal or polymer tails. CONSTITUTION: The process comprises the steps of (a) manufacturing a prepolymer by using dimethylaluminum chloride and an electron donor as a catalyst and cocatalyst prepared by reacting (1) a tetravalent titanium compound having one or more of TiX(4-n)(OR)n forms in which X is Cl, R is C 2 to 8 alkyl, n is 0 to 4, (2) magnesium or a magnesium compound having a RMgX form or RMgR form; (3) an alkylhalide compound having an RX form in a molar ratio of 0.1≤component (1)/component (2)≤ 0.5, 0.5≤RX/Mg≤10, or 1≤RX/RMgX≤2 or 2≤RX/RMgR≤4 in a gas phase polymerization and pentane as a solvent and (b) carrying out polymerization using the prepolymer.
Patent KR-20010003128-A (KR)
Inventor: AHN CHEOL BEOM
IPC: H01L21/31
Filed: 1999-06-21
Abstract: PURPOSE: A method for forming an SOG(Spin On Glass) in a manufacturing process of a semiconductor is provided to reduce a time necessary for an over-process of an SOG. CONSTITUTION: A method for forming an SOG in a manufacturing process of a semiconductor comprises the following steps. The method separates a furnace process from a coating process. A wafer is loaded on a spinner(15) and an SOG is applied thereon. A rinsing process is performed. A bake process is performed continuously within a bake plate(17) according to each step. In the bake process, a hard bake process is performed according to the number of wafer provided to a boat(21) independently of a coating process.
Patent KR-20000006401-A (KR)
Inventor: KATO HIROAKI
IPC: H01L21/027
Filed: 1999-06-23
Abstract: PURPOSE: A light exposing device and vibration proofing device is provided to reduce costs. CONSTITUTION: The present invention discloses a light exposing device and comprising: a false random signal generator(10) generating false random signal, and applying the false random signal to an actuator for controlling the motion of a sporting good; a data storing unit(12) collecting time series data obtained by the sensor for metering the motion of said sporting good together the time series data of the false random signal; a pre-filtering unit(13) filtering the time series data stored in said data storing unit; a system simulator(14) inducing a mathematical model from the data processed by said pre-filtering unit(13); and a self diagnosis unit(15) inducing the characteristic value of said sporting good by using said mathematical model.
Patent KR-20010003641-A (KR)
Inventor: PARK CHAN GUK
IPC: F16K17/19
Filed: 1999-06-24
Abstract: PURPOSE: A manostat of a cabinet heater for movement is provided to ensure permanent stability and reliability of a product by preventing the adherence of a float. CONSTITUTION: Gas flowing into a manostat(10) from a gas container is discharged via a nipple connected with a hose under the control of an outlet port by an over-pressure cutting off unit(20) embedding a float in a float chamber(21). An adherence preventing protrusion(30) is formed on the bottom of the float chamber. Thus, the adherence of the float on the bottom of the float chamber is prevented. The gas output is shut off immediately and an accident is avoided.
Patent KR-20010004926-A (KR)
Inventor: KIM JEONG HYEON
IPC: H01L21/027
Filed: 1999-06-30
Abstract: PURPOSE: A reticle of a semiconductor device is provided to prevent deterioration caused by topology of respective layers of a device. CONSTITUTION: A reticle includes at least two layers of reticle pattern(4) formed on a quartz glass(2). Fabrication of the reticle begins with directly forming the first reticle pattern having higher topologic features on the quartz glass(2). The first reticle pattern is then covered with the first thin intermediate layer(6). Next, the second reticle pattern having middle topologic features is formed on the first thin intermediate layer(6). The second reticle pattern is then covered with the second thin intermediate layer(16), and the third reticle pattern(4) having lower topologic features is formed on the second thin intermediate layer(16). Furthermore, a phase shift layer(18) may be formed on third reticle pattern(4).
Patent KR-20000063105-A (KR)
Inventor: JANG KI HO
IPC: B01D3/00
Filed: 1999-06-30
Abstract: PURPOSE: A system for improving the effectiveness of distilling process of water and durability of filter elements by balancing the distiller and the filter for capacity is provided. CONSTITUTION: The system, including a filter constituent(20) for multi-staged filtration with a pump(21) in a case box(10), a heating tank(30) with a heater housed in the case for receiving filtered water from the filter, a cooler(40) for the steam produced at the heating tank(30), a tank(50) for the distilled water from the cooler(40) and a level checking tank(60) maintaining the same level as that of the heating tank(30), further adds a control(70) for the constant balanced supply of filtered water and distilled water in balance.
Patent KR-20000062111-A (KR)
Title: A device for catching flying insects
IPC: A01M1/14
Filed: 1999-07-06
Abstract: The present invention makes it an object to increase an attracting rate of flying insects by enlarging diffusion area of light radiated out of a case from a lamp for attracting flying insects as well as to make the flying insects caught inside the case not to be seen through openings from below. A case (2) of a device for catching flying insects (1) is formed in a polygonal shape more than a pentagon in a cross section view thereof including at least vertical portions (11), an upper slant portion (13) and a lower slant portion (14), openings (15) through which the flying insects invade are provided in the vertical portions (11), the upper and lower slant portions (13, 14), and a plurality of plates (17) are provided in the openings (15) in the lower slant portions (14), so that the flying insects caught by a sheet for catching insects (5) located inside the case (2) may not be recognized from below. <IMAGE>
Patent KR-20000011591-A (KR)
Title: Plasma display panel
Inventor: IKEDA YUICHI
IPC: H01J11/22
Filed: 1999-07-09
Abstract: PURPOSE: A plasma display panel is provided to stably display the clear picture by preventing the generation of an abnormal electric discharge. CONSTITUTION: The plasma display panel contains; a first panel containing plural address electrodes(6) and a first dielectric(7) on the address electrode; a second panel containing plural sets of X sustain electrodes(3) and of Y sustain electrodes(4), and a second dielectric on the sustain electrode. The first panel and the second panel is arranged in the relation to oppose each through an electric discharge space, and the power stoppage capacity of the first dielectric is established to prevent to move the electric charge generated on the first dielectric to the first dielectric by the electric discharge.
Patent KR-20010009543-A (KR)
Inventor: KIM KYONG IL
IPC: A61N1/32
Filed: 1999-07-12
Abstract: PURPOSE: A low frequency medical device showing hyperthermia effect is provided, which adds fomentation effect to exist massage effect and finger-pressure effect, therefore maximizing therapeutic effect of the device. CONSTITUTION: The low frequency medical device showing hyperthermia effect comprises: an electric power part(10) supplying direct current electric power; an expression window part(20) representing motion mode state to exterior; a high-pressure producing part(30) producing high-potential oscillation electric power; an oscillating part(40) supplying basic frequency; a switch entering part(50); a microcontroller(60) controlling total motion of the low frequency medical device according to the signal of the switch entering part(50); a high-pressure switching part(80) providing therapeutic effect to the human body by giving high-pressure(occurred by pulse signals of microcontroller(60)) to a pad(7); the primary safety device part(90) preventing excessive high-pressure on the pad(7) of the high-pressure switching part(80); and a secondary safety device part(100) preventing excessive high-pressure on the high-pressure switching part(80) from a high-pressure controlling part(70).
Patent KR-20010009878-A (KR)
Inventor: KIM JANG GAP
IPC: B22D11/04
Filed: 1999-07-14
Abstract: PURPOSE: A method for producing a continuously cast billet of high nickel containing steel is provided to have excellent surface and inner quality by properly controlling a smelting, a continuously casting and a surface processing condition. CONSTITUTION: Smelted molten metal composed of 0.05 to 0.10wt% of C, 0.15 to 0.35wt% of Si, 0.50 to 0.80wt% of Mn, less than 0.005wt% of P, less than 0.003wt% of S, 0.020 to 0.060wt% of Al, 3,5 to 9.5wt% of Ni, the remaining of Fe and additional impurities, is degassed in a low vacuum degree for more than 20minutes. Then, the degassed molten metal is injected into a turndish in 13 to 17deg.C of temperature and continuously cast by a casting machine at 0.90 to 0.93m/min of casting speed to be a continuously cast billet. The billet is cooled with cooling water and the surface is scarped and ground. Then, an anti-oxidant is spread on the surface.