A7 B7 416309 五、發明説明() 發明領域 本發明有關一種用於光學記錄媒體如光碟（c D )及 數位影音光碟之碟片的模製方法。 習知技術的描述 目前，生產光學記錄媒體如，光碟及數位影音光碟等 碟片的良率已提升至9 5%或更高。當分析造成將近5% 之剩餘瑕疵品的原因時，已發現在5%的瑕疵品中，主要 的成因在於閘切（gate cutting)製程中，因切割所產生的 粉塵。 接下來將說明產生粉塵的原因。圖8中，顯示在碟片 壓模中剛澆滿熔融樹脂後，凹穴C的狀態。此凹穴C形成 於固定模1 0及可移動模2 0的鄰接區域。且在固定模 1 0上澆注套管1 1的出口處，形成一母切具1 2。而在 相對於母切具的1 2的位置處，一公切具2 2縮入可移動 模內。在公切具2 2的中心處，提供有一澆住口的突出梢 2 1。 目前，當以碟片模實施射出及壓鑄成型時，當朝固定 模加壓可移動模而使凹穴中熔融樹脂的壓力增加時，爲了 避免凹穴C內的熔融樹脂回流至澆住套管需要實施閘密封 。其中，當熔融樹脂注滿凹穴C時，公切具2 2前進而插 入母切具1 2內，藉此，便實施閘密封及閘切的程序。此 時公切具2 2及母切具1 2間的重疊量，以α表示。然而 本紙張尺度適用中國國家標準（CNS > Α4规格（210Χ297公釐) ' -4- (請先閲讀背面之注意事項再填疼本頁) 訂 經濟部智慧財產局員工消費合作社印製 A7 B7 416903 五、發明説明^ ) ，由於熔融樹脂在注滿後維持熔融狀態，熔融樹脂容易沒 入母切具1 2及公切具2 2間。結果使得澆注套管1 1及 凹穴C內所注滿的熔融樹脂，容易相互連通，而在母切具 1 2的外圍形成一薄膜Th。當樹脂固化而將模具開啓後 ，突出梢2 1伸出而將模製的碟片D從模具上釋放，如圖 9所示，與碟片分離的薄膜便成爲粉塵。 發明槪要 本發明係基於上述的問題而提出，其目的在於實施閘 密封以防止造成粉塵之薄膜的形成，並因此提供具有高品 質的碟片。 依據本發明的第一觀點，在一種碟片模製方法中，其 中碟片模安裝於壓印器上，且其凹穴內注滿熔融樹脂，藉 由將公切具朝母切具前進而實施閘密封，其後在壓力下維 持一段時間，並冷卻、開模而完成閘切的程序，此方法的 特徵在於在閘密封的步驟中，當公切具恰好插入母切具內 時，澆住口的內壓與公切具的前進壓力相互平衡。 藉此，在本發明中，於公切具恰好插入母切具後，藉 由使澆住口的內壓與公切具的前進壓力相互平衡，公切具 的前進恰好在抵達母切具前停住。亦即，停止在一狀態， 其中公切具與母切具未重疊，且形成的間隙相當小而能防 止熔融樹脂回流至澆注口。據此，閘密封的程序不同於習 知的方式，在公切具與母切具未重疊的情況下亦可達成閘 密封。且因公切具的前進在其壓力與澆注口之內壓平衡下 本紙張尺度適用中國國家標準（CNS ) Α4规格（210Χ297公釐） (請先閲讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消費合作社印製 -5- 五、發明説明^ ) 停止，因此可推論出此設計可獲得高精度的停止位置。 (請先閲讀背面之注意事項再填寫本頁) 進一步的，依據本發明第二特徵的碟片模製方法，在 開模時仍維持公切具的前進壓力。當碟片從固定模的凹穴 面取下時，抵抗公切具之前進壓力的澆注口內壓便移除。 由於公切具具有插入母切具的前進衝程，在維持的前進壓 力下，藉由施予一定的衝程而將公切具進一步的向前行進 。藉此，便實施閘切的程序。 再者，依據本發明第三觀點的碟模製方法，.在開模步 騾中，公切具的前進速度設爲初始的開模速度或更高。且 藉由使開模速度大於等於模釋放速度，公切具及母切具相 互重疊，而實現閘切的程序。 圖示的簡單描述 圖1顯示依據本發明第一實施例之模具的剖面圖，其 中凹穴內注滿熔融樹脂。 圖2的模具剖面圖接續圖1，顯示閘切狀態。 圖3的模具剖面圖接續圖2，顯示開模及閘切的狀態 經濟部智慧財產局員工消費合作社印製 〇 圖4的模具剖面圖接續圖3，顯示將碟片從可移動模 具上釋放的步驟。 圖5顯示利用實施例的方法，用以模製之模具構造的 剖面圖。 圖6顯示公切具之驅動機構的簡圖。 圖7顯示圖5模具中射出套筒及支持塊的配置。 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -6- 經濟部智慧財產局員工消費合作社印製 第88113265號專利申請案 416909 中文說明書修正頁 A7 B7 五、發明說明（4 ) 圖8顯示在凹穴中形成切斷粉塵的薄膜部份。 圖9顯示切斷粉塵如何從圖8的薄膜部份產生 元件對照表 10 固定模 11 湊注套管 12 母切具 1 3 壓印器支持件 14 固定鏡面塊 1 7 固定模安裝板 18 固定模背板 2 0 可移動模 2 1 突出梢 2 2 公切具 2 3 注射套管 2 4 支持塊 2 5 可移動之側鏡面塊 2 7 可移動模安裝板 2 8 可移動模背板 2 9 壓印器外支持件 3 0 圓柱室 3 0 a 前側室 3 0b 後側室 3 1 活塞 3 2 ' 3 3 管線 3 4 旁支管線 3 5 節流閥 3 6' '37 管線 3 8 幫浦 3 9 液槽 本紙張尺度適用中國國家標準（CNS)A4規格（210 X 297公釐） {請先闉讀背面之注意事項再填寫本頁) I ----— I ——訂---------" 桌88m265號專利申請案 中文說明書修正頁 4^6309 8S. 9. 年月 B7 五、發明說明（5 ) 4 0 釋放閥 4 1 偵測桿 5 壓印器 c 凹穴 D 碟片 A 1 空氣 A 2 空氣 V 1 標號 s V 1 電磁交換閥 s v 2 電磁交換閥 較佳實施例的詳細描述 其後將依據附圖來說明本發明的實施例，其中相同於 或對應至習知的部分以相同的標號表示，且略過其細節而 不加以描述。 首先，依據圖5及圖6，說明使用於本發明之碟片模 製方法的模具。 如圖5及圖6所示，有關本發明之實施例的模具 > 包 括一對固定模1 0及可移動模2 0。固定模1 〇具有一構 造，其中固定之側鏡面塊1 4透過固定模背扳1 8支持於 固定模安裝板17上。母切具12、澆注口 1 1及壓印器 支持件1 3同軸的穿過側鏡面塊1 4而配置。進一步的， 在固定鏡面塊1 4之凹穴側的表面上，壓印器S與壓印器 支持件1 3 —同安裝’並構成所謂的固定壓印器。 另一方面，可移動模2 0具有一結構，其中可移動之 側鏡面塊2 5透過可移動模背板2 8支持於可移動模安裝 板27上。突出梢21、公切具22、注射套管23及支 持塊2 4同軸的穿過可移動之側鏡面塊2 5而配置《此外 .，提供壓印器外支持件2 9以覆蓋固定之鏡面塊1 4之凹 本纸張尺度適用中國國家標準（CNS)A4規格（210 χ 297公釐） (請先閱讀背面之注意事項再填寫本頁) 裝.-------訂---------^ 經濟部智慧財產局員工消費合作社印制衣 -8- A7 B7 416909 五、發明説明g ) 穴側表面的周緣。圖5中，在夾持模具的同時，壓印器外 支持件2 9與固定於固定之側鏡面塊1 4的壓印器S接觸 (請先閱讀背面之注意事項再填寫本頁} 〇 進一步的，提供有固定之側鏡面塊1 4的母切具1 2 及壓印器支持件1 3 ，從該處，可將空氣吹出。此外，由 於在支持塊2 4與可移動之鏡面塊2 5間存在有細小的間 隙，從該處亦可將空氣吹出。而注射套管2 3與支持塊 2 4間的細小間隙可用來吸進空氣。 圖6中，簡單的繪出公切具22的驅動機構。在可移 動模20中，形成有圓柱室30。活塞3 1在圓柱室內往 復移動而驅動公切具2 2。圓柱室3 0的前側室3 0 a及 後側室3 0 b分別經由管線3 2及3 3連接至電磁交換閥 SV1。在管線33的線路上，提供一旁支管線34，旁 支管線3 4上則提供有電磁交換閥SV2。且主管線3 3 上具有一節流閥3 5。可供參考的，這些節流閥3 5及電 磁交換閥SV 2亦可省略。進一步的，電磁交換閥S V 1 透過管線3 6及3 7與幫浦3 8及液槽相連。此外，管線 經濟部智慧財產局員工消費合作社印製 3 6上提供有釋放閥4 0。可供參考的，電磁交換閥 SV 1爲4 一埠一 2_位操作閥且電磁交換閥SV2爲2 _埠_ 2 -位操作閥，且螺線管處於位致能的狀態。 公切具2 2的驅動控制程序說明如下。當公切具2 2 位於開始前進的位置時’如圖6所示’電磁交換閥S V 1 及SV 2皆被致能。接著，從幫浦3 8射出的壓力流體從 管線3 6進入管線3 3 ’並經由節流閥3 5供應至後側室 本紙張尺度適用中國國家標準（CNS ) A4说格（210X297公釐） -9- 416909 A7 _B7 五、發明説明丨) (請先閩讀背面之注$項再填寫本頁) 3 0 t)。由於壓力流體的流量小於繞行通過旁支管線3 4 的量，可降低活塞的前進速度。在此低速的前進過程中， 能辨識出精確的停止位置，如公切具2 2附近的停止位置 ，則相當有利。進一步的，當磁交換閥S V 1及S V 2皆 處於未致能的狀態，從幫浦3 8射出的壓力流體經由管線 36及32供應至前側室30a1而將活塞退回。接著， 後側室3 0 b內的壓力流體經由管線3 3及3 7回到液槽 3 9內。當活塞到達前進及後退的極限位置時，由於每一 管線的釋放閥4 0皆開啓，從幫浦3 8射出的壓力流體直 接回到液槽3 9中。 經濟部智慧財產局員工消費合作社印製 可供參考的，在活塞3 1的後表面3 1 a提供一可突 出至圓柱室3 0內的偵測桿4 1。藉由偵測桿4 1的突出 量，便可偵測作爲公切具2 2之操作衝程的活塞3 0衝程 。圖中，公切具2 2的前進起始位置、公切具2 2的前進 極限位置及公切具2 2恰好進入母切具1 2的位置（其後 將加以說明）分別以S、P、E來標示。且對應至公切具 2 2之S、P、E位置之偵測桿的位置分別以s、e、p 來標示。如圖所示，公切具2 2的衝程係可進入母切具 1 2中。 進一步的，在本發明的模具中，如圖7所示，注射套 管2 3及支持塊2 4可從可移動之側鏡面2 5的凹穴側面 處向凹穴內伸出。在圖例中，注射套管2 3及支持塊2 4 的突出量標示爲H1 (約30 — ΙΟΟμιη)。可供參考 的，可進一步驅動注射套管2 3以向凹穴內伸出。如注射 本紙張尺度適用中國國家標準（CNS ) Α4^格（210Χ297公釐） -10- A7 B7 4 J. 6 9 Ο 9 五、發明説明g ) 套管2 3的驅動機構，一活塞可向著圖6中活塞3 1的方 向來驅動注射梢2 1及注射套管2 3。且藉由改變注射梢 2 1及注射套管2 3的驅動時間，可在驅動注射梢2 1而 使其突出後，再驅動注射套管2 3。 接著，參考圖1 - 4將說明使用上述模具的碟片製程 〇 圖1中，位於固定模1 0及可移動模2 0間之凹穴C 的中心部以放大的方式表示。圖1顯示凹穴C的狀態，其 中熔融樹脂從澆注口供應並注滿於凹穴中。 圖2顯示恰好於圖1狀態後的模製狀態。在本發明的 此實施例中，當可移動模2 0向固定模1 0加壓而使凹穴 C內的樹脂壓力增加時，爲了防止凹穴C中的熔融樹脂回 流至徺注口 1 1 ，必須在凹穴C注滿熔融樹脂後前進公切 具2 2來實線閘密封。在閘密封的步驟中，公切具2 2恰 好在插入母切具12前停止（圖6中的位置P) «可供參 考的，爲了更精確的推動公切具2 2，位置P顯示一狀態 ，其中公切具2 2的端面及母切具的端面1 2未重疊，且 兩端面間的細小間隙不致使熔融樹脂回流至澆注口 1 1。 此外，藉由從幫浦3 8提供壓力流體至圓柱室3 0的後室 30b使活塞31獲得驅動壓（設定釋放閥的壓力），並 使公切具2 2前進，而當公切具2 2抵達位置P時，公切 具2 2的前進壓力及澆注口的內壓相互平衡，使得公切具 2 2停止。 順帶一提的，澆注口 1 1的澆注孔朝著噴嘴接觸部而 本k張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） ~ -11 - (請先W讀背面之注意事項再填寫本頁) 訂 經濟部智慧財產局員工消費合作社印製 第S8113265號專利申請案 中文說明書修正頁 4J6909 B7 "89. 9. 1 I 年月曰 89年 修土 經濟部智慧財產局員工消費合作社印製 五、發明說明（9 ) 逐漸變小。據此，澆注口內之熔融樹脂的固化速度遠大於 凹穴C內樹脂的固化速度 < 如圖2的狀態，澆注孔內的熔 融樹脂已固化至某一程度。因此，當公切具2 2前進並接 近母切具1 2時，澆注口 1 1內的熔融樹脂處於受限的狀 態，且澆注口 1 1的內壓增加。據此，當公切具2 2抵達 位置P時，如果將前進壓力設成釋放閥4 0的壓力，公切 具2 2便穩固的停在位置P處。且雖然公切具2 2與母切 具1 2未重疊，仍可實施閘密封以防止熔融樹脂從凹穴C 回流至澆注口 1 1。 進一步的，爲了在試射等狀態下，使公切具2 2在位 置P處的前進壓力與澆注口 1 1的內壓平衡，首先須獲得 公切具2 2之前進壓力（幫浦3 8的射出壓）及所獲得之 前進量的相互關係。接著獲得公切具2 2之前進壓力與切 斷粉塵之產生狀況的相互關係。從所獲得的結果，藉由調 整釋放閥4 0的壓力，便可決定公切具2 2的前進壓力。 圖3中，顯示一狀態，其中在給定的壓力維持後，實 施冷卻，並實施開模及閘切程序。接著，將空氣A i射入母 切具1 2與壓印器支持件1 3之間。同時，吸取可移動模. 2 0的注射套管2 3與支持塊2 4之間的空氣*如標號Vt 所示。且碟片D牢固的安裝在可移動模2 0的凹穴側表面 上》可參考的，將注射套管2 3與支持塊2 4突出於可移 動之側鏡面塊2 5的凹穴側表面，並形成一階梯部，便可 代替注射套管2 3與支持塊2 4間的空氣吸取。藉由此階 梯部，可使碟片D緊貼在可移動模2 0上，並有利於從固 本紙張尺度適用中國國家標準（CNS>A4規格（210 X 297公釐） {請先Μ讀背面之注意事項再填寫本頁) -裝 ---—訂---------·" 41690& A7 B7 五、發明説明！!Q ) 定模1 0的釋放。 (請先閲讀背面之注意事項再填寫本f ) 進一步的，在此開模步驟中，公切具2 2的前進壓力 在圖2所示之閘密封程序中維持一定。接著當從固定模 1 0的凹穴面釋放碟片D時，由於抵抗公切具2 2前進壓 力之澆注口 1 1的內壓被消除，於開模的同時，公切具 22再前進一《的量（CD ’DVD約0 _ 2 — 1 · 0 mm)，並抵達E點（參考圖6)。由於公切具22的前 進操作，因而可實現閘切程序。可供參考的，可將初始的 開模速度設成小於等於公切具2 2的前進速度。且藉由使 開模的時間快於或相同於母切具1 2與公切具2 2的分離 時間，母切具1 2與公切具2 2相互重疊，而獲得良好的 切面。 經濟部智慧財產局員工消費合作社印製 進一步的，藉由使公切具2 2再前進一定的量α，可 使碟片D在開模後能更穩定的保持住。如上所述，在開模 前，公切具2 2並未切穿凹穴中的熔融樹脂，如圖2所示 。據此，模具在此狀態下開啓，由於碟片D與公切具2 2 間的重疊部分未達所需的量，可移動模2 0難以將碟片D 保持住。此外，由於僅吸住碟片的中間部位，標號V 1，欲 將碟片D保持在可移動模2 0變得相當不穩定。因此在釋 放公切具2 2及母切具1 2的同時或之前，公切具2 2前 進而與母切具1 2重疊|以使公切具2 2對碟片D的重疊 量固定》並因而使碟片D維持在穩定的狀態下。 至此，在注射空氣Αι的同時，將空氣Α2注入支持塊 2 4與可移動之側鏡面塊2 5之間，可加速碟片D從可移 本紙張尺度適用中國國家標準（CNS) A4規格（210XZ97公釐） -13- 41G909 A7 _B7 五、發明説明L ) (請先閲讀背西之注意事項再填寫本頁) 動模2 0處的釋放，並可防止所謂的抬頭値退化情形。在 開模步驟後，於可移動模2 0與固定模1 0相互移開的過 程中，如圖4所示，藉由伸出突出梢2 1而將澆住部從公 切具2 2上移開，接著進一步伸出注射套管2 3以將碟片 D從支持塊2 4上釋放，而完成碟片的模製。 上述實施例所獲得的功效如下。即|在閘密封（圖2 ，其在凹穴注滿熔融樹脂後實施）的步驟中，使公切具 22恰好停止在插入母切具12前的位置Ρ(圖6)。接 著，由於在位置Ρ時，公切具2 2的前進壓力及澆注口 1 1的內壓相互平衡，因此公切具..2 2便停止於該處。雖 然公切具2 2與母切具1 2並未重疊，仍可實施閘密封程 序。由於密封時，公切具2 2與母切具1 2並未重疊’因 此不會產薄膜部Th(圖8及圖9)並防止粉塵的產生。 經濟部智慧財產局員工消費合作社印製 進一步的，在開模步驟中（圖3)，由於在閘密封時 保持公切具2 2的前進壓力，於開模時，給予公切具一定 的前進衝程來進行閘切的程序。據此，不須以特別的方式 來控制公切具2 2，便可操作公切具2 2來進行閘切的程 序。此外，由於控制開模的速度，以使公切具2 2的速度 大於初始的開模速度，且公切具2 2與母切具1 2的重疊 速度大於等於公切具2 2與母切具1 2的離開速度’因此 可獲致優良的切面。進一步的，由於公切具2 2向著碟片 D 2的重疊衝程可充分的獲得，碟片D可穩固的安裝於可 移動之模具2 0的側部。 此外，藉由從固定模1 0的母切具1 2與壓印器支持 本紙張尺度適用中國國家標準（CNS ) A4規格（210X297公釐） -14- 416909 at B7 五、發明説明（j2 ) (請先聞婧背面之注意事項再填寫本頁) 件1 3間的間隙處射入空氣，並從可移動模2 0之套管 2 3與支持塊2 4間的間隙處吸出空氣，則碟片D便向可 移動模具2 0的凹穴側偏移，而加速固定模具1 〇的釋放 。此外，注射套管2 3及支持塊2 4從可移動之鏡面塊 2 5突出，且形成有階梯部，使得碟片D抓取住可移動模 2 0，藉此可加速碟片D從固定模1 〇上的釋放。因而， 依據本發明之實施例的碟片模製方法，可生產出高品質的 碟片。 此處，雖然在本發明的實施例中，壓印器S係示例性 的固定於固定之側鏡面塊1 4上，然而在碟片模製方法的 現階段應用中，亦可將壓印器S支持於可移動之側鏡面塊 2 5上，亦即，用以模製碟片的模具可具有可移動的壓印 器。 由於本發明的新穎性構造，因而可獲致下述的功效。 依據本發明碟片模製方法的第一觀點，由於可在不產生薄 層部而造成切斷粉塵的情況下，實施閘密封程序，因此可 獲得極高的生產品質。 經濟部智慧財產局員工消費合作社印製 進一步的，依據本發明碟片模製方法的第二觀點，無 須特別的控制，而在開模的同時，藉由操作公切具便可實 施閘切程序。 此外，依據本發明碟片模製方法的第三觀點，藉由閘 切程序，可獲得極佳的切斷面，並得到高品質的碟片。 本紙張尺度適用中國國家標準（CNS > A4規格（210X297公釐） -15-A7 B7 416309 V. Description of the Invention () Field of the Invention The present invention relates to a method for molding discs for optical recording media such as optical discs (CD) and digital video discs. Description of the known technology At present, the yield rate of producing optical recording media such as optical discs and digital video discs has increased to 9 5% or higher. When analyzing the cause of nearly 5% of the remaining defective products, it has been found that the main cause of the 5% defective products is the dust generated by the cutting in the gate cutting process. Next, the cause of dust generation will be explained. Fig. 8 shows the state of the cavity C immediately after the molten resin is poured into the disc stamper. This cavity C is formed in a region adjacent to the fixed mold 10 and the movable mold 20. And at the exit of the casing 11 cast on the fixed mold 10, a female cutting tool 12 is formed. At a position 12 relative to the mother cutter, a male cutter 22 is retracted into the movable die. At the center of the male cutter 2 2, a protruding tip 2 1 with a pouring opening is provided. At present, when injection and die-casting are performed with a disc mold, when the pressure of the molten resin in the cavity is increased by pressing the movable mold against the fixed mold, in order to prevent the molten resin in the cavity C from flowing back to the pouring sleeve A gate seal needs to be implemented. Among them, when the molten resin is filled in the cavity C, the male cutting tool 2 2 advances and is inserted into the female cutting tool 12, thereby performing the procedures of gate sealing and gate cutting. At this time, the amount of overlap between the male cutter 12 and the female cutter 12 is represented by α. However, this paper size applies the Chinese national standard (CNS > Α4 size (210 × 297 mm) '-4- (Please read the precautions on the back before filling this page)) Order printed by the Intellectual Property Bureau of the Ministry of Economic Affairs and Consumer Cooperatives printed A7 B7 416903 V. Description of the invention ^), because the molten resin is maintained in a molten state after being filled, the molten resin is easily submerged into the female cutting tool 12 and the male cutting tool 22. As a result, the molten resin filled in the pouring sleeve 11 and the cavity C is easy to communicate with each other, and a thin film Th is formed on the periphery of the mother cutting tool 12. When the resin is cured and the mold is opened, the protruding tip 21 is extended to release the molded disc D from the mold. As shown in FIG. 9, the film separated from the disc becomes dust. SUMMARY OF THE INVENTION The present invention is made based on the above-mentioned problems, and an object thereof is to implement a gate seal to prevent the formation of a thin film that causes dust, and thus to provide a disc of high quality. According to a first aspect of the present invention, in a disc molding method, wherein a disc mold is mounted on an imprinter and a cavity is filled with molten resin, the male cutter is advanced toward the female cutter by The gate seal is implemented, and then it is maintained under pressure for a period of time, and the process of the gate cut is completed after cooling and opening the mold. This method is characterized in that in the step of the gate seal, when the male cutter is just inserted into the female cutter, The internal pressure of the mouthpiece is balanced with the forward pressure of the male cutter. Thus, in the present invention, after the male cutter is just inserted into the female cutter, the internal pressure of the pouring gate and the forward pressure of the male cutter are balanced with each other, the advance of the male cutter is stopped just before reaching the female cutter. live. That is, it is stopped in a state where the male cutter and the female cutter do not overlap, and the gap formed is relatively small to prevent the molten resin from flowing back to the pouring gate. According to this, the procedure of the gate seal is different from the conventional method, and the gate seal can also be achieved without the male and female cutters overlapping. And due to the advancement of the cutter, the paper size applies the Chinese National Standard (CNS) A4 (210 × 297 mm) under the balance between its pressure and the internal pressure of the pouring gate. (Please read the precautions on the back before filling this page) Printed by the Consumer Cooperatives of the Ministry of Intellectual Property Bureau -5- 5. Invention Description ^) Stop, so it can be deduced that this design can obtain a high-precision stop position. (Please read the notes on the back before filling this page.) Further, according to the disc molding method of the second feature of the present invention, the forward pressure of the male cutter is maintained when the mold is opened. When the disc is removed from the cavity surface of the fixed mold, the internal pressure of the pouring gate that resists the previous pressure of the male cutter is removed. Since the male cutting tool has a forward stroke inserted into the female cutting tool, the male cutting tool is further advanced by applying a certain stroke under the maintained forward pressure. With this, the gate cut procedure is implemented. Furthermore, according to the disk molding method of the third aspect of the present invention, in the mold opening step, the advance speed of the male cutter is set to the initial mold opening speed or higher. And by making the mold opening speed equal to or higher than the mold release speed, the male and female cutting tools overlap each other to realize the gate cutting process. Brief Description of the Drawings Fig. 1 shows a sectional view of a mold according to a first embodiment of the present invention, in which a cavity is filled with molten resin. The cross-sectional view of the mold of FIG. 2 is continued from FIG. 1 and shows the state of the gate cut. The mold cross-sectional view of FIG. 3 is continued from FIG. 2 and shows the state of mold opening and gate cutting. It is printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs. The mold cross-sectional view of FIG. 4 is continued from FIG. step. Fig. 5 shows a cross-sectional view of a mold structure for molding using the method of the embodiment. FIG. 6 shows a schematic diagram of a driving mechanism of a male cutter. FIG. 7 shows the configuration of the injection sleeve and the support block in the mold of FIG. 5. This paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) -6- Intellectual Property Bureau of the Ministry of Economic Affairs printed the patent application No. 88113265 of the Intellectual Property Cooperative Application 416909 Chinese specification amendment page A7 B7 V. Description of the invention (4) Fig. 8 shows a portion of a film for cutting off dust formed in a cavity. Figure 9 shows how the cut dust generates components from the film part of Figure 8. Table 10 Fixing mold 11 Filling sleeve 12 Female cutting tool 1 3 Stamper support 14 Fixing mirror block 1 7 Fixing mold mounting plate 18 Fixing mold Back plate 2 0 Movable die 2 1 Protruding tip 2 2 Male cutter 2 3 Injection sleeve 2 4 Support block 2 5 Movable side mirror block 2 7 Movable die mounting plate 2 8 Movable die back plate 2 9 Press Printer outer support 3 0 Cylindrical chamber 3 0 a Front side chamber 3 0b Rear side chamber 3 1 Piston 3 2 '3 3 Line 3 4 By-pass line 3 5 Throttle valve 3 6' '37 Line 3 8 Pump 3 9 Tank This paper size applies to China National Standard (CNS) A4 (210 X 297 mm) {Please read the precautions on the back before filling this page) I ----— I ——Order ------- -" Table 88m265 Patent Application Chinese Specification Revised Page 4 ^ 6309 8S. 9. Month B7 V. Description of Invention (5) 4 0 Release Valve 4 1 Detection Rod 5 Imprinter c Cavity D Disc A 1 Air A 2 Air V 1 Designation s V 1 Solenoid exchange valve sv 2 Detailed description of a preferred embodiment of the solenoid exchange valve Hereinafter, the practice of the present invention will be explained with reference to the drawings. Embodiment, wherein the same or the corresponding portions to conventional represented by the same reference numerals, and the details thereof are not Skip be described. First, a mold used in the disc molding method of the present invention will be described with reference to Figs. 5 and 6. As shown in Figs. 5 and 6, a mold according to an embodiment of the present invention > includes a pair of fixed molds 10 and movable molds 20. The fixed mold 10 has a structure in which the fixed side mirror block 14 is supported on the fixed mold mounting plate 17 through the fixed mold back plate 18. The female cutting tool 12, the pouring opening 11 and the stamper supporting member 1 3 are arranged coaxially through the side mirror block 14. Further, the imprinter S and the imprinter supporter 1 3 are mounted on the surface of the concave side of the fixed mirror block 14 to form a so-called fixed imprinter. On the other hand, the movable mold 20 has a structure in which the movable side mirror block 25 is supported on the movable mold mounting plate 27 through the movable mold back plate 28. The protruding tip 21, the male cutter 22, the injection sleeve 23, and the support block 2 4 are coaxially passed through the movable side mirror block 2 5 and configured. In addition, an outer support for the stamper 2 is provided to cover the fixed mirror surface. The paper size of block 1 4 is in accordance with the Chinese National Standard (CNS) A4 specification (210 x 297 mm) (Please read the precautions on the back before filling this page). ------- ^ Printed clothing by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs-8- A7 B7 416909 V. Description of the invention g) The periphery of the acupoint side surface. In Figure 5, while holding the mold, the stamper outer support member 29 is in contact with the stamper S fixed to the fixed side mirror block 14 (Please read the precautions on the back before filling this page} 〇 Further It is provided with a female cutting tool 12 and a stamper supporter 1 3 with a fixed side mirror block 1 4 from which air can be blown out. In addition, since the support block 2 4 and the movable mirror block 2 There is a small gap between the five, and air can also be blown out from there. The small gap between the injection sleeve 23 and the support block 24 can be used to suck in air. In Figure 6, the male cutter 22 is simply drawn. In the movable die 20, a cylindrical chamber 30 is formed. The piston 31 moves back and forth in the cylindrical chamber to drive the male cutter 22. The front chamber 30a and the rear chamber 30b of the cylindrical chamber 30 are respectively It is connected to the electromagnetic exchange valve SV1 via lines 3 2 and 33. On the line of line 33, a side branch line 34 is provided, and the side branch line 34 is provided with the electromagnetic exchange valve SV2. And the main line 3 3 has a throttle valve 3 5. For reference, these throttle valves 35 and solenoid exchange valve SV 2 can also be omitted. Further, The electromagnetic exchange valve SV 1 is connected to pump 38 and the liquid tank through pipelines 36 and 37. In addition, a release valve 40 is provided on the printing of the consumer co-operative society of the Intellectual Property Bureau of the Ministry of Pipeline Economy. The release valve 40 is provided for reference. The solenoid exchange valve SV 1 is a 4-port, 2-position operated valve and the solenoid exchange valve SV2 is a 2-port, 2-position operated valve, and the solenoid is in a position-enabled state. Drive control of the male cutter 2 2 The procedure is explained as follows. When the male cutter 2 2 is located at the start position, as shown in FIG. 6, the solenoid exchange valves SV 1 and SV 2 are both enabled. Then, the pressure fluid ejected from the pump 38 is passed from the pipeline 3 6 Enter the pipeline 3 3 'and supply it to the rear chamber via the throttle valve 3 5 The paper size is applicable to the Chinese National Standard (CNS) A4 standard (210X297 mm) -9- 416909 A7 _B7 V. Description of the invention 丨) (Please first Min read the note on the back of the page and fill in this page) 3 0 t). Since the flow of the pressure fluid is smaller than the amount bypassed through the bypass line 3 4, the forward speed of the piston can be reduced. During this low-speed advancement process, it is possible to identify the precise stop position, such as the stop position near the male cutter 2 2, which is quite advantageous. Further, when the magnetic exchange valves S V 1 and S V 2 are both in an disabled state, the pressure fluid ejected from the pump 38 is supplied to the front side chamber 30a1 through the lines 36 and 32 to return the piston. Then, the pressure fluid in the rear chamber 30 b returns to the liquid tank 39 through the lines 33 and 37. When the piston reaches the extreme positions of forward and backward, since the release valve 40 of each line is opened, the pressure fluid ejected from the pump 38 is directly returned to the liquid tank 39. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economics For reference, a detection rod 41 is provided on the rear surface 3 1 a of the piston 3 1 and can protrude into the cylindrical chamber 30. By detecting the protruding amount of the lever 41, it is possible to detect the 30 stroke of the piston which is the operating stroke of the male cutter 22. In the figure, the forward starting position of the male cutter 22, the forward limit position of the male cutter 22, and the position where the male cutter 2 2 just enters the female cutter 12 (will be described later) are respectively S, P , E to mark. And the positions of the detection rods corresponding to the S, P, and E positions of the male cutter 2 2 are marked with s, e, and p, respectively. As shown, the stroke of the male cutter 2 2 can enter the female cutter 12. Further, in the mold of the present invention, as shown in FIG. 7, the injection sleeve 23 and the support block 24 can protrude into the cavity from the side of the cavity of the movable side mirror surface 25. In the illustration, the protrusions of the injection cannula 23 and the support block 2 4 are denoted as H1 (approximately 30-100 μm). For reference, the injection cannula 23 can be further driven to protrude into the cavity. If the size of this paper is injected, the Chinese National Standard (CNS) A4 ^ grid (210 × 297 mm) -10- A7 B7 4 J. 6 9 Ο 9 V. Description of the invention g) The driving mechanism of the sleeve 2 3, a piston can face towards In FIG. 6, the direction of the piston 31 drives the injection tip 21 and the injection sleeve 23. And by changing the driving time of the injection tip 21 and the injection cannula 23, the injection cannula 23 can be driven after the injection tip 21 is driven to protrude. Next, a disc manufacturing process using the above mold will be described with reference to FIGS. 1-4. In FIG. 1, the center portion of the cavity C between the fixed mold 10 and the movable mold 20 is shown in an enlarged manner. Fig. 1 shows the state of the cavity C in which the molten resin is supplied from the pouring gate and filled in the cavity. FIG. 2 shows the molded state just after the state of FIG. 1. In this embodiment of the present invention, when the movable mold 20 presses the fixed mold 10 to increase the resin pressure in the cavity C, in order to prevent the molten resin in the cavity C from flowing back to the pouring nozzle 1 1 After the cavity C is filled with the molten resin, the male cutting tool 22 must be advanced to seal the solid wire brake. In the step of the gate sealing, the male cutter 2 2 stops just before being inserted into the female cutter 12 (position P in FIG. 6) «For reference, in order to push the male cutter 2 2 more accurately, the position P displays a In the state, the end faces of the male cutting tool 22 and the end faces 12 of the female cutting tool are not overlapped, and the small gap between the two end surfaces does not cause the molten resin to flow back to the pouring port 11. In addition, by supplying pressure fluid from the pump 38 to the rear chamber 30b of the cylindrical chamber 30, the piston 31 obtains a driving pressure (the pressure of the release valve is set), and advances the male cutter 2 2 while the male cutter 2 When 2 reaches the position P, the forward pressure of the male cutter 22 and the internal pressure of the pouring gate are balanced with each other, so that the male cutter 22 stops. Incidentally, the pouring hole of the pouring port 11 is facing the nozzle contact part, and this k-sheet scale applies the Chinese National Standard (CNS) A4 specification (210X297 mm) ~ -11-(Please read the precautions on the back first (Fill in this page) Order the printed Chinese manual for the patent application No. S8113265 of the Intellectual Property Bureau of the Ministry of Economic Affairs to print the revised Chinese manual of the patent application 4J6909 B7 " 89.9.1. Printing 5. Description of Invention (9) Gradually becomes smaller. According to this, the solidification speed of the molten resin in the pouring port is much faster than the solidification speed of the resin in the cavity C < As shown in FIG. 2, the molten resin in the pouring hole has solidified to a certain degree. Therefore, when the male cutter 2 2 advances and approaches the female cutter 12, the molten resin in the gate 11 is in a restricted state, and the internal pressure of the gate 11 increases. According to this, when the male cutter 2 2 reaches the position P, if the forward pressure is set to the pressure of the release valve 40, the male cutter 22 stops firmly at the position P. And although the male cutter 2 2 and the female cutter 12 do not overlap, a gate seal may be implemented to prevent the molten resin from flowing back from the cavity C to the pouring gate 11. Further, in order to balance the forward pressure of the male cutter 2 2 at the position P with the internal pressure of the pouring port 1 1 under conditions such as test firing, it is necessary to first obtain the inlet pressure before the male cutter 2 2 (pump 3 8 Injection pressure) and the amount of feed obtained before. Then, the correlation between the advance pressure of the male cutter and the generation status of the cutting dust is obtained. From the obtained results, by adjusting the pressure of the release valve 40, the forward pressure of the male cutter 22 can be determined. In Fig. 3, a state is shown in which after a given pressure is maintained, cooling is performed, and mold opening and closing procedures are performed. Next, the air A i is injected between the mother cutter 12 and the stamper holder 13. At the same time, suck the air between the movable mold .20's injection sleeve 23 and the support block 24 * as indicated by the reference Vt. And the disc D is firmly installed on the cavity side surface of the movable die 20. For reference, the injection sleeve 2 3 and the support block 24 are protruded on the cavity side surface of the movable side mirror block 25. And forming a stepped part can replace the air suction between the injection sleeve 23 and the support block 24. With this stepped portion, the disc D can be closely attached to the movable die 20, and it is favorable to apply the Chinese national standard (CNS > A4 specification (210 X 297 mm)) from the solid paper size. {Please read first. Note on the back, please fill in this page again) -Install ----- Order --------- · " 41690 & A7 B7 V. Description of the invention! ! Q) Release of fixed mode 10. (Please read the precautions on the back before filling in this f). Further, in this mold opening step, the forward pressure of the male cutter 22 is maintained constant during the gate sealing procedure shown in FIG. 2. Then, when the disc D is released from the cavity surface of the fixed mold 10, the internal pressure of the pouring port 11 which resists the forward pressure of the male cutter 22 is eliminated, and the male cutter 22 is advanced one more time when the mold is opened. (CD 'DVD about 0 _ 2 — 1 · 0 mm) and reach point E (refer to Figure 6). Due to the advanced operation of the male cutter 22, the gate-cutting procedure can be realized. For reference, the initial mold opening speed can be set to less than or equal to the forward speed of the male cutter 2 2. And by making the mold opening time faster or the same as the separation time of the female cutting tool 12 and the male cutting tool 22, the female cutting tool 12 and the male cutting tool 22 overlap each other to obtain a good cut surface. Printed by the Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs Further, by making the cutting tool 2 2 advance a certain amount α, the disc D can be more stably maintained after the mold is opened. As mentioned above, before the mold is opened, the male cutter 22 does not cut through the molten resin in the cavity, as shown in FIG. 2. According to this, the mold is opened in this state, and since the overlap between the disc D and the male cutter 2 2 does not reach the required amount, it is difficult for the movable mold 20 to hold the disc D. In addition, since only the middle portion of the disc is sucked, designated V1, it becomes quite unstable to keep the disc D in the movable mold 20. Therefore, at the same time or before releasing the male cutting tool 2 2 and the female cutting tool 12, the male cutting tool 2 2 advances and overlaps with the female cutting tool 12 | so that the overlapping amount of the male cutting tool 2 2 to the disc D is fixed " As a result, the disc D is maintained in a stable state. So far, while injecting air Aι, injecting air A2 between the support block 24 and the movable side mirror block 25, the accelerating disc D can be moved from the paper size to the Chinese National Standard (CNS) A4 specification ( 210XZ97 mm) -13- 41G909 A7 _B7 V. Description of the invention L) (Please read the precautions of the West first and then fill out this page) Release of the movable mold 20, and prevent the so-called head-up degeneration. After the mold opening step, as the movable mold 20 and the fixed mold 10 are moved away from each other, as shown in FIG. 4, the pouring part is moved up from the male cutter 2 2 by protruding the protruding tip 21. Then, the injection cannula 23 is further extended to release the disc D from the supporting block 24, and the molding of the disc is completed. The effects obtained in the above embodiments are as follows. That is, in the step of sealing the gate (FIG. 2 which is performed after the cavity is filled with molten resin), the male cutter 22 is stopped at the position P just before the female cutter 12 is inserted (FIG. 6). Next, at the position P, the forward pressure of the male cutter 22 and the internal pressure of the pouring port 11 are balanced with each other, so the male cutter 2 stops there. Although the male cutter 2 2 and the female cutter 12 do not overlap, the gate sealing process can be implemented. Since the male cutting tool 22 and the female cutting tool 12 do not overlap at the time of sealing ', the thin film portion Th (Fig. 8 and Fig. 9) is not produced, and generation of dust is prevented. The Consumer Cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs printed further that during the mold opening step (Figure 3), due to maintaining the forward pressure of the cutting tool 22 when the gate is sealed, the cutting tool is given a certain advance when the mold is opened Stroke to perform the gate cut program. According to this, it is not necessary to control the male cutter 22 in a special way, and the male cutter 22 can be operated to perform the gate cutting process. In addition, because the speed of mold opening is controlled so that the speed of the male cutting tool 22 is greater than the initial mold opening speed, and the overlapping speed of the male cutting tool 22 and the female cutting tool 12 is greater than or equal to the male cutting tool 22 and the female cutting tool. With a departure speed of 12 ', an excellent section can be obtained. Further, since the overlapping stroke of the male cutter 2 2 toward the disc D 2 can be fully obtained, the disc D can be stably installed on the side of the movable mold 20. In addition, the paper size is supported by the female cutting tool 12 of the fixed die 10 and the stamper. This paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -14- 416909 at B7 V. Description of the invention (j2) (Please read the precautions on the back of Jing before filling out this page) Inject air into the gap between parts 1 and 3, and suck air from the gap between the sleeve 2 3 and the support block 2 4 of the movable mold 20, then The disc D is shifted toward the cavity side of the movable mold 20, and the release of the fixed mold 10 is accelerated. In addition, the injection cannula 23 and the support block 24 project from the movable mirror block 25, and a stepped portion is formed so that the disc D grasps the movable mold 20, thereby accelerating the disc D from being fixed. Release on die 10. Therefore, according to the disc molding method of the embodiment of the present invention, a high-quality disc can be produced. Here, although the stamper S is exemplarily fixed on the fixed side mirror block 14 in the embodiment of the present invention, the stamper can also be used in the current stage of the disc molding method. S is supported on the movable side mirror block 25, that is, a mold for molding a disc may have a movable stamper. Due to the novel structure of the present invention, the following effects can be obtained. According to the first aspect of the disc molding method of the present invention, since the gate sealing process can be performed without cutting off dust caused by the thin layer portion, extremely high production quality can be obtained. According to the second viewpoint of the disc molding method of the present invention, the employee cooperative of the Intellectual Property Bureau of the Ministry of Economic Affairs prints further. No special control is required, and at the same time when the mold is opened, the gate cutting process can be implemented by operating the public cutting tool. . In addition, according to the third aspect of the disc molding method of the present invention, an excellent cut surface can be obtained by a gate cutting process, and a high-quality disc can be obtained. This paper size applies to Chinese national standards (CNS > A4 size (210X297 mm) -15-