201221247 六、發明說明： c發明所屬之技術領域3 本發明涉及薄板鑄造裝置，涉及用於使金屬熔液通過 旋轉的兩個鑄造輥之間進行冷卻及凝固的薄板鑄造裝置。 5 【先前技術】 為了製造如鎂那樣的非鐵金屬及其合金的薄板，利用 使非鐵金屬的熔液通過旋轉的2個鑄造輥之間進行冷卻凝 固的薄板鑄造裝置。在使用這種薄板鑄造裝置時，在鑄造 輥之間分散並流動的熔液通過鑄造輥冷卻而開始凝固，最 10 後形成板材。 通過薄板鑄造裝置製造的板材由其工序條件以及製造 過程決定板材的厚度均勻度或有無缺陷等，目前的現狀是 正積極研究能夠形成具有可靠性的板材的方法。 【發明内容】 15 本發明的一個實施例提供一種控制形成在鑄造輥的邊 緣部表面的氧化物層的厚度來消除造成薄板表面缺陷的主 要因素的薄板鑄造裝置。 本發明的一個實施例提供一種能夠防止熔液向鑄造輥 的外側漏出的薄板鑄造裝置。 20 本發明的一個實施例提供一種能夠在喷嘴組件内控制 熔液的流動來得到薄板的最佳厚度形狀的薄板鑄造裝置。 根據本發明的一個實施例，薄板鑄造裝置包括：相互 隔開的一對鑄造輥；喷嘴組件，設置在上述鑄造輥之間形 成的流入部上，用於供給熔液；至少一個刷子組件，包括 201221247 在與上述轉造親對應的位置設置並可移動的旋轉軸、及安 ^ 述旋轉軸上的刷子；驅動部，使上述刷子組件的上 述㈣袖旋轉；以及氣缸，使上述刷子組件向上述铸造輥 表面移動。 5 /上述薄板鑄造裝置還可以包括：氧化膜厚度測定部， 測疋形成在上述鑄造輥表面的氧化膜的厚度；及控制部， 收來自上述氧化膜厚度測定部的信號，根據上述信號有 選擇地驅動上述驅動部及上述氣缸。上述氧化膜厚度測定 邛可以包括：與上述鑄造輥的邊緣部表面對應的傳感器， 10及從上述傳感器接收信號來計算形成在鑄造輕表面的氧化 膜的厚度之後，向上述控制部傳遞計算結果的上述氧化膜 厚度的計算單元。 上述一對鑄造輥可以包括第一鑄造輥及第二鑄造輥。 上述至少一個刷子組件包括多個刷子組件，上述多個刷子 15組件包括與上述第一鑄造輥對應的第一刷子組件及與上述 第一鑄造輥對應的第二刷子組件。上述驅動單元包括分別 與上述第一及第二刷子組件的旋轉軸連接並使之旋轉的第 及第二驅動部、以及分別向第一鑄造輥及第二鑄造輥表 面移動上述第一及第二刷子組件並使之密合在鑄造輥表面 20的第—及第二氣缸。 上述薄板鑄造裝置還可以包括薄板缺陷測定單元，該 薄板缺陷測定單元設置在從上述多個鑄造輥中排出的薄板 的運送路役上’測定上述薄板表面上的缺陷，向控制部傳 遞與上述缺陷相關的信號。上述薄板缺陷測定單元可以是 4 201221247 目視傳感器。 根據本發明的一個實施例，薄板鑄造裝置包括：相互 隔開配置的第一鑄造輥及第二鑄造輥；喷嘴組件，設置在 上述第一鑄造輥及上述第二鑄造輥之間所形成的流入部 5 上，用於供給熔液；以及冷卻氣體喷射裝置，向上述熔液 供給冷卻氣體。 上述冷卻氣體噴射裝置可以設置在上述鑄造輥的排出 部兩側，並向被排出的薄板的兩邊緣部喷射冷卻氣體。 上述薄板鑄造裝置還可以包括：薄板缺陷測定單元， 10 設置在從上述第一及第二鑄造輥排出的薄板的運送路徑 上，測定薄板表面上的缺陷；以及控制部，與上述薄板缺 陷測定單元及上述冷卻氣體喷射裝置連接，根據來自上述 薄板缺陷測定單元的信號來控制上述冷卻氣體喷射裝置的 動作。 15 根據本發明的一個實施例，薄板鑄造裝置包括：相互 隔開配置的第一鑄造輥及第二鑄造輥；及喷嘴組件，設置 在上述第一鑄造輥及上述第二鑄造輥之間所形成的流入部 上，用於供給熔液。上述喷嘴組件包括相互隔開形成空間 的上部部件及下部部件、和配置在上述空間内並調節上述 20 溶液的流動的至少一個調節壩。 上述各調節壩可以包括··位於上述内部空間的攪拌部 件；一端固定在上述攪拌部件上、另一端向上述噴嘴組件 外部露出的軸；及固定在上述軸的向外露出端並使上述攪 拌部件旋轉的旋鈕。 5 201221247 上述攪拌部件的兩前端可以具有尖銳的形狀。此外， 上述攪拌部件的寬度從上述兩前端向中央部逐漸增加。 這樣的根據本發明的一個實施例的薄板鑄造裝置執行 對於熔液的凝固脆弱區域即各鑄造輥邊緣部的研磨工序， 5 除去具有熱傳遞障礙膜的作用的氧化膜或減小氧化膜的厚 度，據此可以在鑄造輥邊緣部形成均勻的厚度的凝固角。 由此，可以生產邊緣部具有良好的質量的薄板。 此外，根據本發明的一個實施例的薄板鑄造裝置，在 發生邊緣壩的損傷時，向從鑄造輥排出的薄板喷射冷卻氣 10 體來強制冷卻熔液，從而抑制熔液過度地向外側漏出，進 而防止因此而製造寬度比所設定的寬度大的薄板。 此外，根據本發明的一個實施例的薄板鑄造裝置，在 熔液流動的喷嘴組件内設置熔液流動調節用壩，控制溶液 的流動，從而具有使薄板的橫截面厚度形狀維持適合壓延 15 工序的形狀的效果。結果，壓延工序之後得到的最終產品 當然可以具有均勻的厚度形狀。 圖式簡單說明 第1圖是根據本發明的一個實施例的薄板鑄造裝置的 立體圖。 20 第2圖是用於說明根據本發明的一個實施例的薄板鑄 造裝置的控制系統的框圖。 第3圖是根據本發明的一個實施例的薄板鑄造裝置的 立體圖。 第4圖是用於說明根據本發明的一個實施例的薄板鑄 201221247 造裝置的控制系統的框圖。 第5圖是根據本發明的一個實施例的薄板鑄造裝置的 立體圖。 第6圖是表示第5圖所示的薄板鑄造裝置的喷嘴組件結 5 構的俯視圖。 第7圖是第5圖所示薄板鑄造裝置的喷嘴組件的橫截面 圖。 第8圖是用於理論上說明薄板的最佳厚度形狀的薄板 截面圖。 10 第9圖是表示根據本發明的一個實施例的向邊緣部流 動過量的熔液的情況下構成調節壩的攪拌部件在喷嘴組件 内的配置狀態的圖。 【實施方式3 以下，參照附圖詳細說明薄板鑄造裝置，但是本發明 15 不限於下述的實施例。因此，所屬技術領域的普通技術人 員可以在不脫離本發明的技術思想的範圍内以多種形態體 現本發明。附圖中的構成要素的尺寸是為了強調本發明的 明確性而相對於實物進行放大表示的。構成要素被言及 “第一”及“第二”時，不是為了限定這些構成要素，而僅僅 20 是為了區分構成要素。因此，對於“第一 ”及“第二”構成要 素可以各自選擇性地或交換性地使用。 第1圖是根據本發明的一個實施例的薄板鑄造裝置的 立體圖，基於該實施例的薄板鑄造裝置包括上下配置並向 相反的方向旋轉的上部鑄造輥111和下部鑄造輥112、和設 7 201221247 置在上部鑄造親111及下部鑄造棍112的流入部用於供給稼 液的噴嘴組件113。上部鑄造輥111及下部鑄造輥112配置成 隔開預定的間隔。 供給到喷嘴組件113内的熔液在喷嘴組件113内分散而 5通過上部鑄造輥111和下部鑄造輥112之間。這樣，從喷嘴 組件113内排出的熔液在通過上部鑄造輥lu和下部鑄造輥 112之間的過程中冷卻凝固，然後以預定寬度的薄板形態從 上部鑄造報111和下部轉造輥112中排出。 第2圖是用於說明根據本發明的一個實施例的薄板鱗 10造裝置的控制系統的框圖，基於本發明的一實施例的薄板 鑄造裝置包括：用於測定形成在上部鑄造輥11丨及下部鑄造 輥112表面的氧化膜的厚度的氧化膜厚度測定部12〇 ;測定 薄板S上缺陷的薄板缺陷測定單元140 ;接收來自氧化膜厚 度測定部120和薄板缺陷測定單元140的信號的控制部13〇 ; 15 刷子組件150 ;以及根據控制部130的控制進行動作而使刷 子組件150工作的驅動單元160。 若說明各構成部分的結構及功能則如下。 氧化膜厚度測定部120包括：設置在與上部鑄造輥lu 鄰接位置上的第一傳感器121、設置在與下部鑄造輥112鄰 20 接位置上的第二傳感器122、和分別與第一傳感器121及第 二傳感器122連接的氧化膜厚度計算單元123、124。 第一傳感器121及第二傳感器122對應於上部鑄造輥 111及下部鑄造輥112的邊緣部，從而生成與形成在上部鑄 造輥111及下部鑄造輥112的邊緣部表面上的氧化膜對應的 201221247 信號。 在第一傳感器121及第二傳感器122中產生的信號分別 向氧化膜厚度計算單元123、124傳遞，在該氧化膜厚度計 算單元123、124中，基於被傳遞的信號計算形成在上部鑄 5造輥111及下部鑄造輥112的邊緣部表面上的氧化膜的厚 度。 薄板缺陷測定單元14〇設置在與從上部鑄造輥lu和下 部鑄造輥112排出的薄板s對應的位置即薄板s的運送路徑 上，測定有可能存在於薄板8的表面上的缺陷。執行這種功 10能的薄板缺陷測定單元140例如是目視傳感器。 與氧化膜厚度測定部12〇的氧化膜厚度計算單元123、 124和薄板缺陷測定單元14〇連接的控制部13〇根據來自氧 化膜厚度计算單元123、124和薄板缺陷測定單元14〇的對於 氧化膜厚度和薄板缺陷的資訊來控制後述的刷子組件的動 15 作。 即’在上料造輥U1及下部鑄造輥112的邊緣部表面 上形成有預定厚度以上的氧化膜的情況下，控制部⑽對其 進行判斷而制子組件動作，將上部及下部鑄造輥in、u2 表面的氧化膜去除以至其達到預定厚度以下。 2〇 冑過這種過程，當判斷為形成在上部鑄造輥川及下部 鱗造輥112的邊緣部表面上的氧化膜減小到預定的厚度以 下時’控制部130使刷子組件的動作停止。 根據從薄板缺陷測定單元_專送的信號，當判斷為在 薄板S的表面上存在如由於上部及下部缚造親⑴、112邊緣 9 201221247 部表面上過度地形成的氧化膜而形成的薄板邊緣部的缺陷 那樣的缺陷時，控制部130使刷子組件動作將上部及下部 錆造輥111、112表面的氧化膜去除到預定厚度以下。 此外，通過刷子組件150，形成在上部禱造概ηι及下 部鐺造輥112的邊緣部表面的氧化膜減小到所設定的厚度 以下，並因此不能通過薄板缺陷測定單元丨4 〇測定薄板表面 的缺陷時，控制部13〇使刷子組件150的動作停止。 利用第1圖說明刷子組件150的結構。 席J子植件150包括第一及第二刷子組件1 $ 1、152。 第及第二刷子組件151、152分別設置在與上部鑄造 輥111及下部鑄造輥112鄰接的位置，設置成可以朝著上部 錆造輥111及下部鑄造輥112移動。 第一及第二刷子組件151、152分別相對於對應的上部 及下部铸造輥111、U2驅動，以下為了方便說明，僅例舉 第刷子組件151來說明。 第一刷子組件151包括被設置成可朝向鑄造輥111移動 的旋轉軸15 la及固定在旋轉軸i51a上的至少一个刷子 l5lb、151c。隨著這種刷子組件151的旋轉即刷子151b、151c 的旋轉’鑄造輥111的表面被刷子151b、151c研磨。這裏， 在第1圖中’僅圖示了構成第二刷子組件152的刷子中的一 個刷子152b。但是，根據本發明的一個實施例，為了鑄造 輥的邊緣部表面研磨，刷子對應於鑄造輥的兩邊緣部的情 況下’刷子的數量沒有限制。 使第一及第二刷子組件151、152旋轉，也就是使旋轉 201221247 軸15la旋轉的驅動單元160包括：分別與第一及第二刷子組. 件丨51、152的旋轉軸151a連接而使其旋轉的第一驅動部 161a與第二驅動部161b(參照第2圖）、以及使第一及第二刷 子組件151、152向上部鑄造輥111及下部鑄造輥112移動並 5使其密合的第一氣缸162a及第二氣缸162b。 第一及第二驅動部161a、161b和第一及第二氣缸162a、 162b與控制部130電連接，由此，控制部13〇控制第一及第 二驅動部161a、161b和第一及第二氣缸162a、162b的驅動。 如此構成的根據本發明的一個實施例的薄板鑄造裝置 10的整體的動作及各構成單元的具體功能利用各附圖進行說 明。 從喷嘴組件113排出的熔液在上部鑄造輥in和下部鑄 造輥112之間流動，在通過上部鑄造輥111和下部鑄造輥112 的過程中，熔液被冷卻凝固而以預定寬度的薄板形態排出。 在執行這種工序的過程中’與上部鑄造輥及下部鱗 k輥112鄰接設置的第一傳感器121及第二傳感器122向氧 化膜厚度計算單元123、124傳送與形成在上部鑄造輥in及 下。卩鑄造輥112的表面的氧化膜、特別是形成在邊緣部的氧 化祺對應的資訊(信號）。 氧化膜厚度計算單元123、124基於在第一傳感器121 =第二傳感器122中產生的信號，計算形成在上部及下部禱 造報1U、112的邊緣部的氧化膜的厚度，並向控制部13〇傳 送該計算出的結果。 在從乳化膜厚度計算單元⑵、124傳送的上部鱗造觀 201221247 111及下部鑄造輥112的邊緣部表面上的氧化膜厚度是設定 值以上的情況下，控制部13〇對其進行判斷而使驅動部動 作，也就是說，使與第一及第二刷子組件151、152的旋轉 軸151a連接的第一及第二驅動部〗6ia、161b和第一及第二 5 氣缸162a、162b動作。 因此，第一及第二刷子組件151、152的刷子151b、151c 與上部鑄造親111及下部鑄造輥112邊緣部表面接觸的同時 旋轉’其結果形成在上部鑄造輥及下部鑄造輥112的邊 緣部表面上的氧化膜被去除或其厚度減小。 10 通過這種過程，若形成在上部鑄造輥111及下部鑄造輥 112的邊緣部表面的氧化膜的厚度減至設定值以下時，控制 部130停止第一及第二驅動部161a、161b和第一及第二氣缸 162a、162b的動作，使第一及第二刷子組件151、152與上 部鑄造輥ill及下部鑄造輥112隔開，並且停止刷手151b、 15 151c的旋轉。 另一方面’設置在通過上部鑄造輥111及下部鑄造輥 112而運送的薄板s的運送路徑上的薄板缺陷測定單元140 測定可存在於薄板S的表面上的缺陷 、即由於上部及下部鑄 錢m、112的邊緣部上過度地形成的氧化膜而形成的薄 20板邊緣部的缺陷，並向控制部13〇傳遞該信號。 控制部130基於從薄板缺陷測定單元140傳送的信號判 斷疋否存在薄板缺陷，當判斷為存在缺陷時，控制部130使 第及第一,驅動部161a、161b和第一及第二氣缸162a、162b 動作而實施上述的過程，將上部及下部鎮造輥111、112的 12 201221247 邊緣部表面的氧化膜去除以呈其達到預定厚度以下。 通過這種研磨過程，妨礙熔液的熱傳遞到上部及下部 鑄造輥111、112的熱傳遞障礙膜即形成在上部鑄造輥ηι及 下部鑄造輥112的邊緣部表面的氧化膜的厚度減小。 5 因此，熔液的熱向上部及下部鑄造輥U1、112特別是 由於冷卻能較小而延遲凝固的各邊緣部有效地傳遞，從而 在上部及下部鑄造親111、112的邊緣部也均勻地形成溶液 的凝固角’結果不產生薄板的邊緣部缺陷。 第3圖是根據本發明的一個實施例的薄板鑄造裝置的 10立體圖。參照第3圖，薄板鑄造裝置包括上部鑄造輥211、 下部鑄造輥212及喷嘴組件213。第3圖的薄板鑄造裝置與第 1及第2圖的薄板鑄造裝置類似，在相同的部分使用相同的 附圖符號’省略其詳細的說明。 在喷嘴組件213的兩側設有用於防止熔液向外側漏出 15的、由耐火物質構成的邊緣壩（未圖示）。另外，在上部鑄造 輥211和下部鑄造輥212的排出部兩側部分別設有用於噴射 冷部氣體的冷卻氣體噴射裝置221、222。冷卻氣體噴射裝 置221 222從外部接收冷卻氣體，並與後述的控制部電連 接。 20 因此’根據控制部的控制信號，冷卻氣體喷射裝置221、 222向從上部鑄造輥211和下部鎮造親212排出的薄板$的兩 邊緣部嘴射冷卻氣體。 第4圖是用於說明根據本發明的-個實施例的薄板铸 造裝置的控制系統的框圖，如上說明那樣，基於本發明的 13 201221247 一個實施例的薄板鑄造裝置包括：設置在鎮造觀2ΐι、2i2 的排出部兩側部的冷卻氣體噴射裝置22卜222，控制冷卻 氣體噴射裝置22卜222的動作的控制部奶，以及設置在薄 的移動路徑上並測疋薄板的邊緣部上的缺陷的薄板缺 5陷測定單元224。 叹置在鑄造輥211、212的排出部兩側部的冷卻氣體喷 射裝置22卜222分別對應於從铸造輥m、犯排出的薄板 2S的兩邊緣部，從外部被供給冷卻氣體。 根據控制部223的控制信號，安裝在冷卻氣體喷射裝置 10 221、222的内部的如閥那樣的流量控制單元動作，由此， 可以控制通過冷卻氣體喷射裝置221、222排出的冷卻氣體 的喷射量及喷射時間。這裏，冷卻氣體_酬如是I氣、 氬氣等。 薄板缺陷測定單元224設置在與從上部鑄造輥211和下 15 °卩鎊造輥212排出的薄板S對應的位置即薄板s的運送路徑 上，測定有可能存在於薄板s的表面即兩邊緣部的缺陷。執 行這種功能的薄板缺陷測定單元224例如是目視傳感器。 與薄板缺陷測定單元224電連接的控制部223，同冷卻 氣體喷射裝置221、222電連接而控制冷卻氣體喷射裝置 2〇 221、222的工作。 這樣構成的根據本發明的一個實施例的薄板鑄造裝置 的整體的動作及各構成單元的具體功能利用各附圖進行說 明。 從喷嘴組件213排出的熔液向上部鑄造輥211和下部鑄 201221247 造報212之間供給，在通過上部鑄造輥211和下部鑄造概212 的過程中，溶液被冷卻凝固而以預定寬度的薄板形態排出。 6又置在通過上部鑄造輥211及下部鑄造輥212而被運送 的薄板S的運送路徑上的薄板缺陷㈣定單元224測定可能存 5在於薄板S的表面上的缺陷，即，測定因邊緣壩的損傷而造 成熔液過度地向外側漏出，從而薄板的邊緣部向預定寬度 的外測突出的缺陷，並向控制部223傳遞該測定信號。 控制部223基於從薄板缺陷測定單元224傳遞的信號判 斷是否存在薄板缺陷，若判斷為存在薄板缺陷，控制部奶 10就使冷卻氣體喷射裝置221、222工作。 因此，向通過上部及下部鑄造輥211、212排出的未完 全冷郃凝固的狀態的薄板的兩邊緣部噴射冷卻氣體，結果， 薄板的兩邊緣部以比自然冷卻快的速度被冷卻。 如此通過被喷射的冷卻氣體，使通過邊緣壩的損傷的 15部位向預定寬度的外侧擴散漏出的熔液以較快的速度冷 卻，能夠預防薄板的邊緣部向外側突出而使薄板整體的寬 度增大到預定寬度以上的問題。 例如，根據薄板的兩邊緣部的缺陷程度，也就是説比 薄板的設定寬度突出的部分的程度，控制部223調節冷卻氣 20體喷射裝置22卜222内的調節單元而調節冷卻氣體的喷射 I。例如可通過調節閥門的開閉程度來調節冷卻氣體的喷 射量。 第5圖是根據本發明的一個實施例的薄板鑄造裝置的 立體圖。第6圖是表示第5圖所示薄板鑄造裝置的噴嘴組件 15 201221247 的結構的俯視圖。另外，第7圖是第5圖所示的根據本發明 的一個實施例的薄板鑄造裝置的喷嘴組件的橫截面圖。具 體地’第6圖是表示在過量的熔液向中央部移動的情況下， 構成調節壩的授拌部件在噴嘴組件内的配置狀態的橫截面 5圖。 若參照第5圖，根據該實施例的薄板鑄造裝置包括：上 下配置而向相反的方向旋轉的上部鑄造輥311及下部鑄造 輥312 ;以及設置在上部鑄造輥311及下部鑄造輥312的流入 部’用於供給炫液的喷嘴組件313。 10 供給到喷嘴組件313内的熔液在喷嘴組件313内分散而 通過上部鑄造輥311和下部鑄造輥312之間。這樣’從噴嘴 組件313内排出的熔液在通過上部鑄造輥311和下部鑄造輥 312的過程中被冷卻凝固，然後以預定寬度的薄板s形態從 上部鑄造輥311和下部鑄造輥312中排出。 15 若參照第6圖，在喷嘴組件313的兩側設有用於防止熔 液向外側漏出的、由耐火物質構成的邊緣壩314。 喷嘴組件313包括上部部件313a及下部部件313b，在噴 嘴組件313的内部形成有由上部部件313a及下部部件313b 形成的作為熔液的流動通道的空間313c^在喷嘴組件313的 20内部空間313c中配置有至少一個調節壩320。調節壩320具 有調節熔液的流動的功能。 若參照第7圖，調節塌320包括位於喷嘴組件313的内部 空間313c的攪拌部件321、固定在攪拌部件321上的軸322及 固定在軸322的上端的旋鈕323。 16 201221247 調節塌32G的轴322貫穿上部部件仙或下部部件 313b ’其終端在外部露出，在露出的終端固定有用於使授 摔部件321旋轉的旋紐323。因此，当操作者轉動位於喷嘴 組件313的外部的旋紐323時’授拌部件321在嘴嘴組件阳 5 的内部空間313c中旋轉。 另一方面，第7圖中示出調節壩320的旋鈕位於喷嘴組 件313的上部部件313a的上部，但是也可以設置成位於下部 部件313b的下部。但是，為了操作者容易操作旋鈕323，優 選將旋鈕323設置成位於喷嘴組件313的上部部件M3a的上 10 咅 |5 〇 如此構成的根據本發明的一實施例的薄板鑄造裝置的 整體的動作及構成單元的具體功能利用各附圖進行說明。 從喷嘴組件313排出的溶液在上部鑄造概311和下部鱗 造輥312之間流動，在通過上部鑄造輥311和下部鑄造輥312 15的過程中，熔液被冷卻凝固’從而以預定厚度的薄板形態 排出。 但是，如上說明那樣’薄板的厚度被由上部及下部縳 &親311、312的熱變开>及機械變形造成的觀間隙左右。第& 圖是用於理論上說明薄板的最佳厚度形狀的薄板截面圖β 20參照第8圖，若考慮薄板S在壓延過程中向寬度方向變形， 則從上部鑄造輥311和下部鑄造輥312排出的薄板S的形狀 如第8圖所示地中央部的厚度tc比兩邊緣部的厚度Te大預 疋的量為佳。 當由上部及下部鑄造輥311、312的熱變形及機械變形 17 201221247 造成輥間隙變形，從而薄板s中央部的厚度Tc和兩邊緣部的 厚度Te的絲出設定餅，操作者藉㈣節各調節壩320 來控制喷嘴組件313内的熔液的流動方向。 第6圖是表示過量的炫液向中央部流動時構成調㈣ 5的攪拌部件在嗔嘴組件内的配置狀態的圖。若參职第6圖， 薄板中央部的厚度Tc與兩邊緣部的厚度Te相比厚到設定值 以上的狀態意示著向喷嘴組件313内部空間仙的中又央部 流動過量的熔液。因此，操作者通财調節壩320的旋紐 323 ’賴拌部件321旋轉，從而使更多的量的炫液向嘴嘴 10組件313的内部空間313c的兩邊緣部流動。 根據這種調節壩32G的配置狀態㈣拌部件3 ^態，更多的量的炼液向喷嘴組件313的内部空間仙的兩 緣部流動，縣，通過上部及下料造如U、犯而排 15 =的薄板的邊緣部的厚度增加，而具有如第8圖所示那樣的 最佳的厚度分布。 W雌料動過㈣Μ的情況下構成 調郎壩的㈣部件在噴嘴組件内的配置狀態的圖。若參昭 約圖，則薄板S中央部的厚度Tc比兩邊緣部的厚度 下、或者中央部的厚度Te與兩邊緣部的厚度Te相同 意味著向喷嘴組件313的内部空間313c的兩邊緣部 2過量㈣液。對此，_者通過各調旋細 ^轉磐部件321，截斷向兩邊緣部流動的部分溶液，使大 量的溶液向噴嘴組件313内部空間他的中央部流動。 根據第9圖所示的這種調節壤32〇的配置_，大量的 20 201221247 熔液向喷嘴組件313内部空間313c的中央部流動，因此，通 過上部及下部鑄造輥311、312而排出的薄板s的中央部的厚 度增加，而具有如第8圖所示那樣的最佳的厚度分布。 例如，為了維持熔液順利的流動，優選將各調節壩32〇 5的攪拌部件321做成流線形。即，如第9圖所示，攪拌部件 321的兩前端具有幾乎沒有其寬度的尖銳的形狀，但是具有 其寬度向中央部逐漸增加的形狀。 工業可利用性 如上所述的根據本發明一個實施例的薄板鑄造裝置執 10行對於熔液的凝固脆弱區域即各鑄造輥邊緣部的研磨工 序’除去具有熱傳遞障礙膜的作用的氧化臈或減小氧化膜 的厚度，因此可以在鑄造輥邊緣部形成均勻的厚度的凝固 角。由此’可以生產邊緣部具有良好質量的薄板。 此外，根據本發明的一個實施例的薄板鑄造裝置，在 15發生邊緣壩的損傷時，向從铸造輥排出的薄板噴射冷卻氣 體來強制冷卻熔液，從而抑制熔液過度地向外側漏出，進 而防止因此而製造寬度比所設定的寬度大的薄板。 此外，根據本發明的一個實施例的薄板鑄造裝置，在 溶液流動的喷嘴組件内設置熔液流動調節用壩，控制溶液 20的流動，從而具有使薄板的橫截面厚度形狀維持適合壓延 工序的形狀的效果。結果，壓延工序之後得到的最終產品 當然可以維持均勻的厚度形狀。 【圖式簡單說明】 第1圖是根據本發明的一個實施例的薄板鑄造裝置的 19 201221247 立體圖。 第2圖是用於說明根據本發明的一個實施例的薄板鑄 造裝置的控制系統的框圖。 第3圖是根據本發明的一個實施例的薄板鑄造裝置的 5 立體圖。 第4圖是用於說明根據本發明的一個實施例的薄板鑄 造裝置的控制系統的框圖。 第5圖是根據本發明的一個實施例的薄板鑄造裝置的 立體圖。 10 第6圖是表示第5圖所示的薄板鑄造裝置的喷嘴組件結 構的俯視圖。 第7圖是第5圖所示薄板鑄造裝置的喷嘴組件的橫截面 圖。 第8圖是用於理論上說明薄板的最佳厚度形狀的薄板 15 截面圖。 第9圖是表示根據本發明的一個實施例的向邊緣部流 動過量的熔液的情況下構成調節壩的攪拌部件在喷嘴組件 内的配置狀態的圖。 【主要元件符號說明】 121…第一傳感器 122···第二傳感器 123、124…厚度計算單元 130…控制部 140…缺陷測定單元 S…薄板 111…上部鑄造輥 112…下部鑄造輥 113…噴嘴組件 120…厚度測定部 20 201221247 150…刷子組件 223…控制部 151···第一刷子組件 224…薄板缺陷測定單元 15 la…旋轉軸 311…上部鑄造輥 151b、151c、152b…刷子 312…下部鑄造輥 152…第二刷子組件 313…喷嘴組件 160…驅動單元 313a…上部部件 161 a…第一驅動部 313b…下部部件 161b…第二驅動部 313c···空間 162a…第一氣缸 314…邊緣壤 162b…第二氣缸 320…調節壩 211···上部鑄造輥 321…攪拌部件 212···下部鑄造輥 322…轴 213···噴嘴組件 221、222…冷卻氣體喷射裝置 323…旋紐 21201221247 VI. Description of the Invention: TECHNICAL FIELD OF THE INVENTION The present invention relates to a thin plate casting apparatus, and relates to a thin plate casting apparatus for cooling and solidifying between two casting rolls for rotating molten metal. 5 [Prior Art] In order to produce a thin plate of a non-ferrous metal such as magnesium and an alloy thereof, a thin plate casting apparatus which cools and solidifies a molten metal of a non-ferrous metal by rotating between two casting rolls is used. In the case of using such a thin plate casting apparatus, the molten metal which is dispersed and flowed between the casting rolls is solidified by the casting rolls to be solidified, and finally the sheet is formed. The sheet material produced by the thin-plate casting apparatus determines the thickness uniformity or the presence or absence of defects of the sheet material by the process conditions and the manufacturing process, and the current state of the art is actively studying a method capable of forming a sheet having reliability. SUMMARY OF THE INVENTION An embodiment of the present invention provides a thin-plate casting apparatus that controls the thickness of an oxide layer formed on a surface of a bevel portion of a casting roll to eliminate a main factor causing surface defects of the sheet. One embodiment of the present invention provides a thin plate casting apparatus capable of preventing molten metal from leaking to the outside of a casting roll. An embodiment of the present invention provides a thin plate casting apparatus capable of controlling the flow of molten metal in a nozzle assembly to obtain an optimum thickness shape of a thin plate. According to an embodiment of the present invention, a thin plate casting apparatus includes: a pair of casting rolls spaced apart from each other; a nozzle assembly disposed on an inflow portion formed between the casting rolls for supplying a molten metal; at least one brush assembly including 201221247 providing a movable rotating shaft at a position corresponding to the above-mentioned transfer and a brush on the rotating shaft; a driving portion for rotating the (four) sleeve of the brush assembly; and a cylinder for causing the brush assembly to The surface of the casting roll moves. 5 / The thin plate casting apparatus may further include: an oxide film thickness measuring unit that measures a thickness of the oxide film formed on the surface of the casting roll; and a control unit that receives a signal from the oxide film thickness measuring unit and selects according to the signal The drive unit and the cylinder are driven by the ground. The oxide film thickness measurement unit may include a sensor corresponding to the edge portion surface of the casting roll, and a signal received from the sensor to calculate a thickness of the oxide film formed on the cast light surface, and then transfer the calculation result to the control unit. The calculation unit of the above oxide film thickness. The pair of casting rolls described above may include a first casting roll and a second casting roll. The at least one brush assembly includes a plurality of brush assemblies including a first brush assembly corresponding to the first casting roller and a second brush assembly corresponding to the first casting roller. The driving unit includes second and second driving portions respectively connected to the rotating shafts of the first and second brush assemblies and rotating, and moving the first and second surfaces respectively to the surfaces of the first casting roller and the second casting roller The brush assembly is brought into close contact with the first and second cylinders of the casting roll surface 20. The thin plate casting apparatus may further include a thin plate defect measuring unit that is provided on a conveyance path of the thin plate discharged from the plurality of casting rolls to measure a defect on the surface of the thin plate, and transmit the defect to the control unit Related signals. The above-mentioned thin plate defect measuring unit may be 4 201221247 visual sensor. According to an embodiment of the present invention, a thin plate casting apparatus includes: a first casting roll and a second casting roll disposed apart from each other; and a nozzle assembly disposed between the first casting roll and the second casting roll The portion 5 is for supplying a molten metal; and the cooling gas injection device supplies a cooling gas to the molten metal. The cooling gas spraying device may be disposed on both sides of the discharge portion of the casting roll, and spray the cooling gas to both edge portions of the discharged sheet. The thin plate casting apparatus may further include: a thin plate defect measuring unit, 10 disposed on a conveying path of the thin plate discharged from the first and second casting rolls, and measuring a defect on the surface of the thin plate; and a control unit and the thin plate defect measuring unit The cooling gas injection device is connected, and the operation of the cooling gas injection device is controlled based on a signal from the thin-plate defect measuring unit. According to an embodiment of the present invention, a thin plate casting apparatus includes: a first casting roll and a second casting roll disposed apart from each other; and a nozzle assembly formed between the first casting roll and the second casting roll The inflow portion is used to supply the melt. The nozzle assembly includes an upper member and a lower member spaced apart from each other to form a space, and at least one regulating dam disposed in the space and regulating the flow of the 20 solution. Each of the adjustment dams may include: a stirring member located in the inner space; a shaft fixed at one end to the agitating member and exposed at the other end to the outside of the nozzle assembly; and fixed to an outwardly exposed end of the shaft and the agitating member Rotating knob. 5 201221247 Both front ends of the above stirring member may have a sharp shape. Further, the width of the agitating member gradually increases from the both distal ends toward the central portion. Such a thin plate casting apparatus according to an embodiment of the present invention performs a grinding process for a solidified fragile region of a molten metal, that is, an edge portion of each casting roll, 5 removing an oxide film having a function of a heat transfer barrier film or reducing a thickness of the oxide film According to this, a solidification angle of a uniform thickness can be formed at the edge portion of the casting roll. Thereby, a thin plate having a good quality at the edge portion can be produced. Further, according to the thin plate casting apparatus of one embodiment of the present invention, when the edge dam is damaged, the cooling gas 10 is sprayed toward the thin plate discharged from the casting roll to forcibly cool the molten metal, thereby suppressing the molten metal from leaking excessively to the outside. Further, it is prevented to manufacture a thin plate having a width larger than the set width. Further, according to the thin plate casting apparatus of one embodiment of the present invention, the melt flow regulating dam is provided in the nozzle assembly in which the melt flows, and the flow of the solution is controlled so as to maintain the cross-sectional thickness shape of the thin plate suitable for the rolling 15 process. The effect of the shape. As a result, the final product obtained after the calendering process can of course have a uniform thickness shape. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a thin plate casting apparatus according to an embodiment of the present invention. 20 Fig. 2 is a block diagram for explaining a control system of a thin plate casting apparatus according to an embodiment of the present invention. Fig. 3 is a perspective view of a thin plate casting apparatus according to an embodiment of the present invention. Fig. 4 is a block diagram for explaining a control system of a thin plate casting 201221247 manufacturing apparatus according to an embodiment of the present invention. Fig. 5 is a perspective view of a thin plate casting apparatus according to an embodiment of the present invention. Fig. 6 is a plan view showing the structure of a nozzle assembly of the thin-plate casting apparatus shown in Fig. 5. Fig. 7 is a cross-sectional view showing the nozzle assembly of the thin plate casting apparatus shown in Fig. 5. Fig. 8 is a sectional view of a thin plate for theoretically explaining the optimum thickness shape of the thin plate. Fig. 9 is a view showing an arrangement state of a stirring member constituting the regulating dam in the nozzle unit in the case where an excessive amount of molten metal flows to the edge portion according to an embodiment of the present invention. [Embodiment 3] Hereinafter, a thin plate casting apparatus will be described in detail with reference to the drawings, but the present invention 15 is not limited to the following embodiments. Therefore, the present invention can be embodied in various forms within the scope of the technical idea of the present invention without departing from the technical idea of the present invention. The dimensions of the constituent elements in the drawings are shown enlarged to the actual matter in order to emphasize the clarity of the present invention. When the constituent elements are referred to as "first" and "second", it is not intended to limit these constituent elements, but only 20 is to distinguish constituent elements. Thus, the "first" and "second" constituent elements can each be used selectively or interchangeably. 1 is a perspective view of a thin plate casting apparatus according to an embodiment of the present invention, the thin plate casting apparatus according to this embodiment includes an upper casting roll 111 and a lower casting roll 112 which are arranged up and down and rotated in opposite directions, and a setting 7 201221247 The inflow portion of the upper casting pro 111 and the lower casting rod 112 is used to supply the nozzle assembly 113 of the liquid. The upper casting roll 111 and the lower casting roll 112 are disposed to be spaced apart by a predetermined interval. The melt supplied into the nozzle assembly 113 is dispersed in the nozzle assembly 113 and passed between the upper casting roll 111 and the lower casting roll 112. Thus, the melt discharged from the nozzle assembly 113 is cooled and solidified in the process between passing between the upper casting roll lu and the lower casting roll 112, and then discharged from the upper casting sheet 111 and the lower converting roller 112 in the form of a sheet having a predetermined width. . 2 is a block diagram for explaining a control system of a thin plate scale 10 manufacturing apparatus according to an embodiment of the present invention, and a thin plate casting apparatus according to an embodiment of the present invention includes: for measuring formation on an upper casting roll 11丨The oxide film thickness measuring unit 12 that measures the thickness of the oxide film on the surface of the lower casting roll 112, the thin plate defect measuring unit 140 that measures the defect on the thin plate S, and the control of the signal from the oxide film thickness measuring unit 120 and the thin plate defect measuring unit 140. a brush assembly 150; and a drive unit 160 that operates to control the brush assembly 150 in accordance with control of the control unit 130. The structure and function of each component are as follows. The oxide film thickness measuring unit 120 includes a first sensor 121 disposed at a position adjacent to the upper casting roll lu, a second sensor 122 disposed at a position adjacent to the lower casting roll 112, and a first sensor 121 and The oxide film thickness calculating units 123, 124 to which the second sensor 122 is connected. The first sensor 121 and the second sensor 122 correspond to the edge portions of the upper casting roll 111 and the lower casting roll 112, thereby generating a 201221247 signal corresponding to the oxide film formed on the surface of the edge portion of the upper casting roll 111 and the lower casting roll 112. . The signals generated in the first sensor 121 and the second sensor 122 are respectively transmitted to the oxide film thickness calculating units 123 and 124, and in the oxide film thickness calculating units 123 and 124, based on the transmitted signals, the calculation is performed on the upper casting 5 The thickness of the oxide film on the surface of the edge portion of the roller 111 and the lower casting roller 112. The thin plate defect measuring unit 14 is provided on a transport path of the thin plate s which is a position corresponding to the thin plate s discharged from the upper casting roll lu and the lower casting roll 112, and measures defects which may exist on the surface of the thin plate 8 is measured. The thin plate defect measuring unit 140 that performs such work is, for example, a visual sensor. The control portion 13A connected to the oxide film thickness calculating units 123 and 124 and the thin-plate defect measuring unit 14A of the oxide film thickness measuring portion 12A is oxidized according to the oxide film thickness calculating units 123 and 124 and the thin-plate defect measuring unit 14A. Information on film thickness and sheet defects is used to control the movement of the brush assembly described later. In other words, when an oxide film having a predetermined thickness or more is formed on the surface of the edge portion of the upper material forming roll U1 and the lower casting roll 112, the control unit (10) determines the sub-assembly to operate the upper and lower casting rolls in The oxide film on the surface of u2 is removed so that it reaches a predetermined thickness or less. 2〇 When the process is such that the oxide film formed on the surface of the edge portion of the upper casting roll and the lower scale roll 112 is reduced to a predetermined thickness or less, the control unit 130 stops the operation of the brush unit. According to the signal transmitted from the thin plate defect measuring unit _, it is judged that there is a thin plate edge formed on the surface of the thin plate S as an excessively formed oxide film on the surface of the upper and lower bounding edges (1), 112 edge 9 201221247 In the case of a defect such as a defect, the control unit 130 operates the brush unit to remove the oxide film on the surfaces of the upper and lower nip rolls 111 and 112 to a predetermined thickness or less. Further, by the brush assembly 150, the oxide film formed on the surface of the upper portion of the upper and lower embossing rolls 112 is reduced to a level below the set thickness, and thus the sheet surface cannot be measured by the sheet defect measuring unit 丨4 〇 At the time of the defect, the control unit 13 stops the operation of the brush unit 150. The structure of the brush assembly 150 will be described using FIG. The seat J implant 150 includes first and second brush assemblies 1 $ 1, 152. The first and second brush assemblies 151, 152 are respectively disposed adjacent to the upper casting roll 111 and the lower casting roll 112, and are provided to be movable toward the upper forming roll 111 and the lower casting roll 112. The first and second brush assemblies 151, 152 are driven relative to the respective upper and lower casting rolls 111, U2, respectively, hereinafter, for convenience of description, only the first brush assembly 151 will be described. The first brush assembly 151 includes a rotating shaft 15 la that is disposed to be movable toward the casting roll 111 and at least one brush l5 lb, 151c that is fixed to the rotating shaft i51a. With the rotation of the brush assembly 151, i.e., the rotation of the brushes 151b, 151c, the surface of the casting roll 111 is ground by the brushes 151b, 151c. Here, in the first drawing, only one of the brushes constituting the second brush unit 152 is illustrated. However, according to an embodiment of the present invention, in order to grind the edge portion surface of the casting roll, the number of brushes in the case where the brush corresponds to both edge portions of the casting roll is not limited. The driving unit 160 that rotates the first and second brush assemblies 151, 152, that is, rotates the 201221247 shaft 15la, includes: connecting the rotation shafts 151a of the first and second brush sets, respectively, to the first and second brush sets. The rotating first drive unit 161a and the second drive unit 161b (see FIG. 2) and the first and second brush assemblies 151 and 152 are moved to the upper casting roll 111 and the lower casting roll 112 to be in close contact with each other. The first cylinder 162a and the second cylinder 162b. The first and second driving units 161a and 161b and the first and second cylinders 162a and 162b are electrically connected to the control unit 130, whereby the control unit 13 controls the first and second driving units 161a and 161b and the first and the second The driving of the two cylinders 162a, 162b. The overall operation of the thin-plate casting apparatus 10 according to an embodiment of the present invention thus constructed and the specific functions of the respective constituent units will be described using the respective drawings. The melt discharged from the nozzle assembly 113 flows between the upper casting roll in and the lower casting roll 112, and during the passage of the upper casting roll 111 and the lower casting roll 112, the melt is cooled and solidified to be discharged in the form of a sheet having a predetermined width. . In the process of performing such a process, the first sensor 121 and the second sensor 122 disposed adjacent to the upper casting roll and the lower scale k-roller 112 are conveyed to the oxide film thickness calculating units 123 and 124 and formed in the upper casting roll in and below. . The oxide film on the surface of the casting roll 112, in particular, the information (signal) corresponding to the cerium oxide formed at the edge portion. The oxide film thickness calculating units 123 and 124 calculate the thicknesses of the oxide films formed at the edge portions of the upper and lower prayer flags 1U, 112 based on the signals generated in the first sensor 121 = the second sensor 122, and the control unit 13 〇 Transfer the calculated result. When the thickness of the oxide film on the surface of the edge portion of the upper scale formation 201221247 111 and the lower casting roll 112 conveyed from the emulsion film thickness calculation units (2) and 124 is equal to or greater than the set value, the control unit 13 determines The driving unit operates, that is, the first and second driving units 6ia and 161b and the first and second 5 cylinders 162a and 162b connected to the rotating shaft 151a of the first and second brush units 151 and 152 are operated. Therefore, the brushes 151b, 151c of the first and second brush assemblies 151, 152 are rotated while being in contact with the surface of the upper casting pro 111 and the lower casting roller 112, and the result is formed at the edge portions of the upper casting roller and the lower casting roller 112. The oxide film on the surface is removed or its thickness is reduced. When the thickness of the oxide film formed on the surface of the edge portion of the upper casting roll 111 and the lower casting roll 112 is reduced to a predetermined value or less, the control unit 130 stops the first and second driving units 161a and 161b and the first step. The operation of the first and second cylinders 162a, 162b separates the first and second brush assemblies 151, 152 from the upper casting roll ill and the lower casting roll 112, and stops the rotation of the brush hands 151b, 15 151c. On the other hand, the thin-plate defect measuring unit 140 provided on the transport path of the thin plate s transported by the upper casting roll 111 and the lower casting roll 112 measures defects which may exist on the surface of the thin plate S, that is, due to the upper and lower casting money. A defect of the edge portion of the thin 20 plate formed by the excessively formed oxide film on the edge portion of m, 112, and the signal is transmitted to the control portion 13A. The control unit 130 determines whether or not there is a thin plate defect based on the signal transmitted from the thin-plate defect measuring unit 140. When it is determined that there is a defect, the control unit 130 causes the first and first driving units 161a and 161b and the first and second cylinders 162a, The above process is carried out by the operation of 162b, and the oxide film on the surface of the edge portion of the 12 201221247 of the upper and lower aging rolls 111, 112 is removed so as to reach a predetermined thickness or less. By this grinding process, the heat transfer barrier film which hinders the heat transfer of the melt to the upper and lower casting rolls 111, 112, i.e., the thickness of the oxide film formed on the edge portions of the upper casting roll η1 and the lower casting roll 112, is reduced. 5 Therefore, the hot upper portion and the lower casting rolls U1, 112 of the melt are efficiently transmitted, in particular, due to the small cooling energy, and the edge portions of the casting pros 111, 112 are uniformly distributed at the upper and lower portions. The formation of the solidification angle of the solution resulted in no edge defects in the sheet. Fig. 3 is a perspective view of a thin plate casting apparatus according to an embodiment of the present invention. Referring to Fig. 3, the thin plate casting apparatus includes an upper casting roll 211, a lower casting roll 212, and a nozzle assembly 213. The sheet casting apparatus of Fig. 3 is similar to the sheet casting apparatus of Figs. 1 and 2, and the same reference numerals are used for the same portions, and the detailed description thereof will be omitted. An edge dam (not shown) made of a refractory material for preventing the molten metal from leaking outward 15 is provided on both sides of the nozzle unit 213. Further, cooling gas injection devices 221 and 222 for injecting cold gas are provided at both side portions of the discharge portions of the upper casting roll 211 and the lower casting roll 212, respectively. The cooling gas injection device 221 222 receives the cooling gas from the outside and is electrically connected to a control unit to be described later. Therefore, according to the control signal of the control unit, the cooling gas injection devices 221 and 222 spray the cooling gas to the both edge portions of the thin plate $ discharged from the upper casting roll 211 and the lower build-up parent 212. Figure 4 is a block diagram for explaining a control system of a thin plate casting apparatus according to an embodiment of the present invention, as explained above, a thin plate casting apparatus according to an embodiment of the present invention 13 201221247 includes: The cooling gas injection device 22 at both sides of the discharge portion of 2ΐ1, 2i2, the control portion milk that controls the operation of the cooling gas injection device 22, and the thin portion of the movement path are disposed on the edge portion of the thin plate. The defective thin plate lacks the measurement unit 224. The cooling gas ejecting means 22 222 which are placed on both sides of the discharge portions of the casting rolls 211, 212 correspond to the both edge portions of the thin plate 2S which are discharged from the casting rolls m, and are supplied with the cooling gas from the outside. According to the control signal of the control unit 223, the flow rate control unit such as a valve mounted inside the cooling gas injection devices 10 221 and 222 operates, whereby the injection amount of the cooling gas discharged through the cooling gas injection devices 221 and 222 can be controlled. And injection time. Here, the cooling gas is such as I gas, argon gas or the like. The thin-plate defect measuring unit 224 is provided on the transport path of the thin plate s at a position corresponding to the thin plate S discharged from the upper casting roll 211 and the lower 15° 卩 roll 212, and may be measured on the surface of the thin plate s, that is, both edge portions. Defects. The thin plate defect measuring unit 224 that performs this function is, for example, a visual sensor. The control unit 223 electrically connected to the thin-plate defect measuring unit 224 is electrically connected to the cooling gas injection devices 221 and 222 to control the operation of the cooling gas injection devices 2 221 and 222. The overall operation of the thin-plate casting apparatus according to one embodiment of the present invention thus constructed and the specific functions of the respective constituent units will be described using the respective drawings. The molten metal discharged from the nozzle assembly 213 is supplied between the upper casting roll 211 and the lower casting 201221247, and during the passage of the upper casting roll 211 and the lower casting pass 212, the solution is cooled and solidified to a predetermined width. discharge. 6 Further, the thin plate defect (four) fixed unit 224 placed on the conveyance path of the thin plate S conveyed by the upper casting roll 211 and the lower casting roll 212 measures the defect on the surface of the thin plate S, that is, the edge dam is measured. The damage causes the melt to leak excessively to the outside, and the edge portion of the thin plate protrudes outward from the predetermined width, and transmits the measurement signal to the control portion 223. The control unit 223 determines whether or not there is a thin plate defect based on the signal transmitted from the thin-plate defect measuring unit 224, and if it is determined that there is a thin plate defect, the control unit milk 10 operates the cooling gas ejecting devices 221 and 222. Therefore, the cooling gas is sprayed to both edge portions of the thin plate which is not completely cooled and solidified by the upper and lower casting rolls 211, 212, and as a result, both edge portions of the thin plate are cooled at a faster speed than natural cooling. By the cooling gas to be ejected, the melt which has been diffused and leaked to the outside of the predetermined width by the portion 15 of the damage of the edge dam is cooled at a relatively high speed, and it is possible to prevent the edge portion of the thin plate from protruding outward and increase the width of the entire thin plate. A problem that is larger than the predetermined width. For example, depending on the degree of defect of both edge portions of the thin plate, that is, the extent to which the set width of the thin plate protrudes, the control portion 223 adjusts the adjustment unit in the cooling gas 20 body injection device 22 222 to adjust the injection of the cooling gas I. . For example, the amount of cooling gas sprayed can be adjusted by adjusting the degree of opening and closing of the valve. Fig. 5 is a perspective view of a thin plate casting apparatus according to an embodiment of the present invention. Fig. 6 is a plan view showing the structure of a nozzle unit 15 201221247 of the thin-plate casting apparatus shown in Fig. 5. Further, Fig. 7 is a cross-sectional view showing the nozzle assembly of the thin plate casting apparatus according to an embodiment of the present invention shown in Fig. 5. Specifically, Fig. 6 is a cross-sectional view showing a state in which the mixing member constituting the regulating dam is disposed in the nozzle assembly in the case where the excess melt moves toward the center portion. Referring to Fig. 5, the thin plate casting apparatus according to the embodiment includes: an upper casting roll 311 and a lower casting roll 312 which are arranged up and down to rotate in opposite directions; and an inflow portion provided in the upper casting roll 311 and the lower casting roll 312 'Nozzle assembly 313 for supplying a liquid. The melt supplied into the nozzle assembly 313 is dispersed in the nozzle assembly 313 and passed between the upper casting roll 311 and the lower casting roll 312. Thus, the melt discharged from the nozzle assembly 313 is cooled and solidified in the process of passing through the upper casting roll 311 and the lower casting roll 312, and then discharged from the upper casting roll 311 and the lower casting roll 312 in the form of a thin plate s of a predetermined width. Referring to Fig. 6, an edge dam 314 made of a refractory material for preventing the molten metal from leaking to the outside is provided on both sides of the nozzle unit 313. The nozzle assembly 313 includes an upper member 313a and a lower member 313b, and a space 313c as a flow passage for the melt formed by the upper member 313a and the lower member 313b is formed inside the nozzle assembly 313 in the internal space 313c of the nozzle assembly 313 At least one adjustment dam 320 is provided. The regulating dam 320 has a function of regulating the flow of the melt. Referring to Fig. 7, the adjustment collapse 320 includes a stirring member 321 located in the inner space 313c of the nozzle assembly 313, a shaft 322 fixed to the stirring member 321, and a knob 323 fixed to the upper end of the shaft 322. 16 201221247 The shaft 322 that adjusts the collapse 32G penetrates the upper member or the lower member 313b', and its terminal is exposed to the outside, and a knob 323 for rotating the slinging member 321 is fixed to the exposed terminal. Therefore, when the operator rotates the knob 323 located outside the nozzle assembly 313, the feeding member 321 rotates in the internal space 313c of the nozzle assembly male 5. On the other hand, the knob of the adjustment dam 320 is shown in Fig. 7 at the upper portion of the upper member 313a of the nozzle assembly 313, but may be disposed at the lower portion of the lower member 313b. However, in order to facilitate the operation of the knob 323 by the operator, it is preferable to provide the knob 323 as an upper 10 咅|5 of the upper part M3a of the nozzle assembly 313, and the overall operation of the thin-plate casting apparatus according to an embodiment of the present invention The specific functions of the constituent units will be described using the respective drawings. The solution discharged from the nozzle assembly 313 flows between the upper casting portion 311 and the lower scale roller 312, and during the passage of the upper casting roller 311 and the lower casting roller 312 15, the melt is cooled and solidified to thereby form a sheet having a predetermined thickness. Form discharge. However, as described above, the thickness of the thin plate is controlled by the upper and lower portions of the heat of the pro-311, 312 and the mechanical gap. The &Fig. is a sectional view of a thin plate for theoretically explaining the optimum thickness shape of the thin plate. Referring to Fig. 8, if the thin plate S is deformed in the width direction during the rolling process, the upper casting roll 311 and the lower casting roll are used. The shape of the thin plate S discharged by 312 is preferably larger than the thickness Te of the both edge portions as shown in Fig. 8 . When the roll gap is deformed by the thermal deformation of the upper and lower casting rolls 311, 312 and the mechanical deformation 17 201221247, the thickness Tc of the central portion of the thin plate s and the thickness Te of the both edge portions are set out, and the operator borrows (four) The dam 320 is adjusted to control the flow direction of the melt within the nozzle assembly 313. Fig. 6 is a view showing an arrangement state of the stirring member constituting the adjustment (4) 5 in the mouthpiece assembly when an excessive amount of the liquid is caused to flow toward the center portion. In the sixth drawing, the state in which the thickness Tc of the central portion of the thin plate is thicker than the thickness Te of the both edge portions to the set value or more means that excessive molten liquid flows into the central portion of the internal space of the nozzle unit 313. Therefore, the operator 238 adjusts the knob 321 of the dam 320 to rotate, thereby causing a larger amount of the liquid to flow toward both edge portions of the internal space 313c of the nozzle 10 assembly 313. According to the arrangement state of the adjustment dam 32G (4), the more the amount of the refining liquid flows toward the two edges of the inner space of the nozzle assembly 313, and the county is made up of U and the upper and lower materials. The thickness of the edge portion of the sheet of the row 15 = is increased, and the thickness distribution is optimal as shown in Fig. 8. In the case where the W female moves through (4) Μ, it constitutes a diagram of the arrangement state of the (four) components of the lang dam in the nozzle assembly. As shown in the drawings, the thickness Tc of the central portion of the thin plate S is greater than the thickness of the both edge portions, or the thickness Te of the central portion and the thickness Te of the both edge portions mean the both edge portions of the internal space 313c of the nozzle assembly 313. 2 excess (four) solution. On the other hand, the respective portions of the solution flowing to the both edge portions are cut by the respective rotary members 321 to cause a large amount of the solution to flow toward the central portion of the internal space of the nozzle unit 313. According to the arrangement of the conditioned soil 32 shown in Fig. 9, a large amount of 20 201221247 melt flows toward the central portion of the internal space 313c of the nozzle unit 313, and therefore, the thin plate discharged through the upper and lower casting rolls 311, 312 The thickness of the central portion of s is increased, and the thickness distribution is optimal as shown in Fig. 8. For example, in order to maintain a smooth flow of the melt, it is preferable that the agitating members 321 of the respective regulating dams 32A5 are streamlined. That is, as shown in Fig. 9, the both ends of the agitating member 321 have a sharp shape having almost no width, but have a shape in which the width gradually increases toward the central portion. INDUSTRIAL APPLICABILITY A thin plate casting apparatus according to an embodiment of the present invention as described above performs 10 steps of a grinding process for a solidified fragile region of a molten metal, that is, an edge portion of each casting roll, to remove cerium oxide having a function of a heat transfer barrier film or The thickness of the oxide film is reduced, so that a solidification angle of a uniform thickness can be formed at the edge portion of the casting roll. Thus, a sheet having a good quality at the edge portion can be produced. Further, according to the thin plate casting apparatus of one embodiment of the present invention, when the edge dam is damaged, the cooling gas is injected to the thin plate discharged from the casting roll to forcibly cool the molten metal, thereby suppressing the molten metal from leaking excessively to the outside, thereby further It is thereby prevented to manufacture a thin plate having a width larger than the set width. Further, according to the thin plate casting apparatus of one embodiment of the present invention, the melt flow regulating dam is provided in the nozzle assembly in which the solution flows, and the flow of the solution 20 is controlled to have a shape in which the cross-sectional thickness shape of the thin plate is maintained suitable for the rolling process. Effect. As a result, the final product obtained after the calendering process can of course maintain a uniform thickness shape. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a perspective view of a 19 201221247 thin sheet casting apparatus according to an embodiment of the present invention. Fig. 2 is a block diagram for explaining a control system of a thin plate casting apparatus according to an embodiment of the present invention. Fig. 3 is a perspective view of a thin plate casting apparatus according to an embodiment of the present invention. Fig. 4 is a block diagram for explaining a control system of a thin plate casting apparatus according to an embodiment of the present invention. Fig. 5 is a perspective view of a thin plate casting apparatus according to an embodiment of the present invention. Fig. 6 is a plan view showing the structure of a nozzle unit of the thin-plate casting apparatus shown in Fig. 5. Fig. 7 is a cross-sectional view showing the nozzle assembly of the thin plate casting apparatus shown in Fig. 5. Figure 8 is a cross-sectional view of a thin plate 15 for theoretically explaining the optimum thickness shape of the thin plate. Fig. 9 is a view showing an arrangement state of a stirring member constituting the regulating dam in the nozzle unit in the case where an excessive amount of molten metal flows to the edge portion according to an embodiment of the present invention. [Description of main component symbols] 121...first sensor 122···second sensor 123,124...thickness calculation unit 130...control unit 140...defect measurement unit S...thin plate 111...upper casting roll 112...lower casting roll 113...nozzle Module 120...thickness measuring unit 20 201221247 150...brush unit 223...control unit 151···first brush unit 224...sheet defect measuring unit 15 la...rotating shaft 311...upper casting rolls 151b, 151c, 152b...brush 312...lower Casting roller 152...second brush assembly 313...nozzle assembly 160...drive unit 313a...upper member 161 a...first drive portion 313b...lower member 161b...second drive portion 313c···space 162a...first cylinder 314...edge The soil 162b...the second cylinder 320...the adjustment dam 211···the upper casting roller 321...the agitating member 212···the lower casting roller 322...the shaft 213···the nozzle assembly 221, 222...the cooling gas injection device 323...the knob 21