!2895〇〇 九、發明說明： 【發明所屬之技術領域】 本發明’是涉及一種光碟基板成形的模具及光碟基板的成 形方法、及藉由光碟基板成形方法貼合所成形的光碟基板的光 碟。 【先前技術】 傳統的光碟基板成形模具，如專利文獻1所示。在專利 文獻1中’疋以相對置所配置，而設有包含閉模時會互動以 形成空腔(cavity)的固定模具及可動模具、及配置於可突出 该可動模具對,置面中央的公刀、及配置於可在前述固定模具 的對置面中央接受前述公刀的母刀、及附載於該母刀内以供 給溶融可塑樹脂材料之洗口套(sprue bush)的光碟基板成形 模具，以藉由讓公刀突出而在母刀之間執行膠口切斷(Gate Cutting)。接下來，專利文獻i圖5等，則表示一般母刀與 公刀光碟基板的成形模具。在前述圖5等揭示的光碟基板成 形模具中，如圖1〇所示讓公刀突出於母刀内時，由於兩者之 間有些微間隙(clearance)，故如圖12所示，會在光碟基板 内^孔端部發生高度高於光碟基板中央區面的毛邊問題。僅 接著’刖述毛邊谷綠後續I程遭受粉碎，粉碎的毛邊掉落 =光碟基板複印面時會造成不良品。此外，以固定模具端所 女裝的打印器（stamper)模具所成形的光碟基板，與其他光碟 基板貼&時’毛邊們也會相互接觸而發生障礙等問題。 專利文獻1 ··特開平11 —2姻48號公報(請求項丨、圖5、 1289500 圖10、圖12) 【發明内容】 所欲解決之技術問題·· 有鑑於上述問題，本發明的目的在於提供一種光碟基板 顧彡模具及成形方法，贿決成形辆基麟絲基板内周 孔&稍發生的而度高於光碟基板中央區面的毛邊問題，且 因毛邊在後續4遭受粉碎後祕於光減印面所造 成的不良品；及與其他光碟基板貼合時，毛邊們也會相互抵 -冑崎生障礙的問題。 解決問題之技術手段·· 本發明如權利要求1所述的光碟基板的成形模具，其特 徵在於：具備合模時會互動而形成空腔的固定模具及可動模 具、及配設於可動模具的可突出公刀、配設於固定模具以插 入公刀而具有内周孔的母刀、及配設於母刀的内周孔或一體 形成，以供給熔融樹脂的澆口套的光碟基板成形模具上，母 _ 刀刚化面隣接内周孔，而形成出高度30//m至80//m的環 狀突起部。 如本發明權利要求2所述的光碟基板的成形方法，其特 徵在於··固定模具與可動模具合模而形成的空腔，是透過配 設於固定模具的澆口套以供給熔融樹脂，將配設於可動模具 的公刀插入於配設於固定模具的母刀内周孔内，以執行膠口 切斷的光碟基板成形方法上，母刀前端面隣接内周孔，而形 成出高度30//m至80/zm的環狀突起部，將熔融樹脂供給 1289500 到空腔後’將公刀插入母刀内周孔以執行膠口切斷。 對照先前技術之功效： 本發明的光碟基板成形模具、成形方法、及安裝於光碟 基板成形模具的母刀，是在插入光碟基板成形模具公刀而擁 有内周孔的母刀前端面隣接内周孔，因形成出高度邪“㈤至 80//m的環狀突起部，因此在成形的光碟基板内周孔端部 上，不會發生尚度高於光碟基板中央區面的毛邊。換言之， 幾乎不發生因前述毛邊受到後續工程所粉碎而掉落於光碟 基板的複印面的不良品出現。因此齡前述辆基板的成形 模具及成形方法，貼合所成㈣辆基板以製造光碟時的成 品率會提高。 【實施方式】 請參閱圖1至圖3以說明本發明的實施形態。圖i為本 實施形態的光碟基板成形模具的重要部位勤圖。圖2為本The present invention relates to a mold for molding an optical disk substrate, a method for molding the optical disk substrate, and a compact disk for bonding the formed optical disk substrate by the optical disk substrate forming method. . [Prior Art] A conventional optical disk substrate forming mold is as shown in Patent Document 1. In Patent Document 1, '疋 is disposed opposite to each other, and is provided with a fixed mold and a movable mold that interact to form a cavity when the mold is closed, and a movable mold that protrudes from the movable mold pair, and is disposed at the center of the surface. a male knives and a mother knives disposed on the center of the opposing surface of the fixed mold to receive the male knives, and a disc substrate forming mold attached to the burr to supply a sprue bush for melting the plastic resin material To perform a glue cutting between the mother knives by protruding the male knives. Next, the patent document i Fig. 5 and the like show a molding die of a general mother blade and a male disk substrate. In the optical disk substrate forming mold disclosed in FIG. 5 and the like, when the male knife protrudes into the mother knife as shown in FIG. 1A, since there is a slight clearance between the two, as shown in FIG. The height of the end portion of the optical disc substrate is higher than that of the central portion of the optical disc substrate. Only the next step is to smash the smashed burrs, and the smashed burrs are dropped. Further, the optical disk substrate formed by the stamper mold of the female mold end is attached to the other optical disk substrate, and the burrs are also in contact with each other to cause an obstacle. [Patent Document 1] Japanese Patent Laid-Open Publication No. Hei No. Hei No. No. Hei No. Hei No. Hei No. Hei No. Hei No. Hei No. Hei No. Hei. The invention provides a disc substrate and a forming method for the optical disc substrate, bridging the inner peripheral hole of the base board of the base board and a slightly higher degree of burrs than the central area of the optical disc substrate, and the burr is damaged after the subsequent 4 The secret is caused by the defective printed matter; and when it is attached to other optical disc substrates, the burrs will also touch each other - the problem of the obstacles. According to a first aspect of the invention, there is provided a molding die for an optical disk substrate according to claim 1, comprising: a fixed mold and a movable mold which are formed to interact with each other during mold clamping, and are disposed in the movable mold. A master blade, a master blade provided in a fixed mold to insert a male blade and having an inner peripheral hole, and an inner peripheral hole disposed in the master blade or an optical disk substrate forming die integrally formed to supply a sprue bush of a molten resin Upper, the female squeezing surface abuts the inner peripheral hole to form an annular projection having a height of 30//m to 80/m. A method of molding an optical disk substrate according to claim 2, wherein the cavity formed by the mold clamping of the fixed mold and the movable mold is supplied with molten resin through a gate cover disposed in the fixed mold. The male knife disposed in the movable mold is inserted into the inner peripheral hole of the female cutter disposed in the fixed mold to perform the method of forming the optical disk cut, and the front end surface of the female knife abuts the inner peripheral hole to form a height 30 //m to 80/zm annular protrusion, after supplying molten resin to 1289500 to the cavity, 'insert the male knife into the inner circumference of the mother knife to perform the glue cut. According to the prior art, the optical disk substrate forming mold, the molding method, and the master blade attached to the optical disk substrate forming mold are adjacent to the inner circumference of the front end surface of the mother blade having the inner peripheral hole inserted into the optical disk forming mold main knife. Since the hole forms an annular protrusion having a height of "five" to 80/m, the edge of the inner peripheral hole of the formed optical disk substrate does not have a burr which is higher than the central portion of the optical disk substrate. In other words, hardly There is a defective product in which the burrs are pulverized by the subsequent work and are dropped on the copy surface of the optical disk substrate. Therefore, the molding die and the molding method of the above-mentioned substrate are bonded together to produce a (four) substrate to produce a compact disk. [Embodiment] An embodiment of the present invention will be described with reference to Fig. 1 to Fig. 3. Fig. 1 is an essential part of the optical disk substrate forming mold of the embodiment.
二施形怨的光碟基板成形模具上的母刀放大剖面圖。圖3為 藉由本實施形態的光碟基板成形模具所成形的光碟基板中 心開口附近的剖面圖。 尤磲基板成形模具11包含了固定模具1 與可動模具13，在合模後的兩模具12，13之間則形成出石 =變容積_腔14。安裝於未揭示在圖式的射出成形機則 ，擁有藉助固定内板16貼合於固嶋 』德板15之冷卻流道的固定鏡面板17、及配讯 定模板15、咖板16及岐鏡面板17關孔的插^ 1289500 (gate insert)18，及配置於插入閘門18内周孔，而將前端 部分肷插於母刀19和母刀19内周孔19a的洗口套2〇等。 本實施形態是以相同高度，設置插入閘門18空腔14 面、與母刀19偏罪外周的前端面i9b。再者，母刀也可和插 入閘門形成一體。此外，在本實施形態中，澆口套2〇上除 了洗口孔以外的空腔14端前端面2〇a則呈平坦面。從空腔 14端來看’前述前端面2〇a在母刀19内周孔1%是位於， 比前述母刀19偏靠外周的前端面19b還要裡面的位置。而 且藉由前述澆口套20前端面2〇a和母刀19内周孔19a，形 成出可插入公刀28的凹部。此外，母刀19與澆口套2〇之 間’則形成出用以冷卻澆口套2〇等的冷卻流道。再者，澆 口套並未限定於前端面呈平坦。此外，澆口套與母刀之間也 可形成出空間流道、錢口套對母刀而言，也可贱定間隔 自由朝軸向移動。再者，澆口套與母刀也可形成為一體。 如圖1所示，包含了安裝於未揭示在圖式的射出成形機 可動盤上的可動模具13，其擁有可動模板2卜貼合於可動 模板21的可動内板22,及藉助可動内板22而貼合於可動模 板21之冷卻、流道的可動鏡面板23、及配置於可動鏡面板u 表面的打印ϋ 24、及配設於可動鏡面板23内周孔以支撐前 述打印器24的關打印器支撐座25、及配設於關打印器 j座25内周孔的固疋套管（stati〇nary sieeve)26、及配 又劎述固疋套官26内周孔而朝軸向自由移動的喷射套管 及配叹於噴射套管27内周孔而朝軸向自由移動的圓柱 1289500 狀公刀28、及嵌插於公刀28内周孔而朝軸向自由移動，且 在前面設有用於將澆口及光碟基板A嵌合於可動模具13端 嵌合部的突出插梢29、及支撐打印器24外周部，且未揭示 在圖式的外周打印器支撐座等。本實施形態中的公刀28前 端面雖呈平坦面，但並未限定於此。 接下來’將透過圖2更加詳細說明本實施形態的母刀w 形狀。母刀19屬於反空腔端呈現出階梯性放大口徑的略圓 柱形。而且軸心則形成出前述般的洗口套2〇及插入公刀28 的内周孔19a。前述内周孔19a 口徑至少同於插入公刀28 的部分。母刀19則在安裝於固定模具12時，在位於空腔14 端前端面的偏靠内周部，朝空腔14端突出以形成出鱗接内 周孔19a的環狀突起部30。本實施形態中的環狀突起部3〇， 自母刀19偏靠外周前端面i9b起算的高度H (朝環狀突起 W5 30空腔14端突出的尺寸）為m。而且環狀突起部 30的内周部30a，設有口徑同於母刀19主體部的内周孔 19a。環狀突起部3〇的頂部3〇b上的放射方向寬幅叽為1〇 。此外，環狀突起部3〇之基礎部分3〇c上的放射方向 寬幅W2為loovm。而且自環狀突起部3〇頂部3〇b起，與 基礎部分30c之間的傾斜面3〇d，是朝内周部30a端及母刀 19主體部端而呈凹狀R面。換言之，傾斜面綱是在基礎部 为30c附近緩慢傾斜，而在頂部3〇b附近形成出傾斜坡度較 小的曲面。 再者’環狀突起部30的高度Η，高於成形時在公刀28 1289500 與母刀19之間所形成的毛邊A1高度約20//m，此外，只要 - 不妨礙熔融樹脂從澆口流往空腔14即可。換言之，環狀突 ^ 起部高度Η為3G"m至，但至7G//m左右更 佳。此外，環狀突起部的頂部寬幅W1，最好是6//111至2〇 Am。因為超乎此寬幅的頂部寬幅W1會較廣，而在毛邊A1 與光碟基板主體之間會形成出間隔，故容易造成毛邊A1折 斷，此外，以母刀加工或成形時的摩耗來說，當頂部寬幅叽 過於鱗時並不恰當。再者，雜突起部_部，並無明確 寬幅，因此也可和坡度小的傾斜面相互連接。並且環狀突起 部的基礎部分寬幅W2方面，則以80//m至12〇//m左右最 佳。此外，關於傾斜面也可由含錐狀(taper)面所構成。再 者’上述尺寸皆屬常溫時的尺寸，而不是成形時的尺寸。此 外，母刀19的材質闕不銹鋼，但也可依據情況針對接觸 母刀熔融樹脂的整個面或只針對環狀突起部，進行况c、An enlarged cross-sectional view of the master knife on the disc substrate forming mold. Fig. 3 is a cross-sectional view showing the vicinity of the opening of the center of the optical disk substrate formed by the optical disk substrate forming mold of the embodiment. The Eucalyptus substrate forming mold 11 includes a fixed mold 1 and a movable mold 13, and a stone/variable volume_cavity 14 is formed between the two molds 12 and 13 after the mold clamping. The injection molding machine, which is not disclosed in the drawings, has a fixed mirror panel 17 attached to the cooling passage of the solid panel 15 by means of a fixed inner panel 16, and a distribution template 15, a coffee maker 16 and a crucible. The mirror panel 17 is inserted into the hole 1289500 (gate insert) 18, and is disposed in the inner peripheral hole of the insertion gate 18, and the front end portion is inserted into the cleaning blade 2 of the inner peripheral hole 19a of the female blade 19 and the female blade 19, etc. . In the present embodiment, the front end surface i9b which is inserted into the cavity 14 surface of the shutter 18 and which is biased against the outer periphery of the mother blade 19 is provided at the same height. Furthermore, the female knife can also be integrated with the insertion gate. Further, in the present embodiment, the sprue bushing 2 has a flat surface on the front end surface 2〇a of the cavity 14 except the mouthpiece. As seen from the end of the cavity 14, the front end surface 2a is located at the inner peripheral hole 19% of the mother blade 19, and is located further inward than the front end surface 19b of the outer periphery of the mother blade 19. Further, the front end face 2'a of the sprue bushing 20 and the inner peripheral hole 19a of the female blade 19 form a recess into which the male blade 28 can be inserted. Further, between the mother blade 19 and the sprue bushing 2', a cooling flow path for cooling the sprue bushing 2 or the like is formed. Furthermore, the sprue bushing is not limited to being flat on the front end face. In addition, a space flow path can be formed between the sprue bushing and the female knife, and the money mouth cover can be moved to the axial direction at a predetermined interval. Furthermore, the sprue bushing and the mother knife can also be formed in one piece. As shown in FIG. 1, the movable mold 13 attached to the movable platen of the injection molding machine not shown in the drawings includes a movable inner plate 22 to which the movable die plate 2 is attached to the movable die plate 21, and a movable inner plate 22, a movable mirror panel 23 attached to the cooling and flow path of the movable die plate 21, and a printing cartridge 24 disposed on the surface of the movable mirror panel u, and a peripheral hole provided in the inner peripheral hole of the movable mirror panel 23 to support the printer 24. Close the printer support base 25, and a solid casing 260 which is disposed on the inner circumference of the printer j seat 25, and the inner circumference of the shackle 26 is axially oriented The freely moving spray sleeve and the cylindrical 1289500 male knife 28 which is slidably moved in the axial direction by the inner circumference of the injection sleeve 27, and is inserted into the inner circumference of the male knife 28 to move freely in the axial direction, and A protruding insertion piece 29 for fitting the gate and the optical disk substrate A to the end fitting portion of the movable mold 13 and an outer peripheral portion for supporting the printer 24 are provided on the front surface, and the outer peripheral printer support base and the like are not disclosed. The front end surface of the male knife 28 in the present embodiment has a flat surface, but is not limited thereto. Next, the shape of the master blade w of the present embodiment will be described in more detail with reference to Fig. 2 . The mother knife 19 has a slightly rounded cylindrical shape in which the reverse cavity end exhibits a stepped magnification. Further, the shaft center is formed with the above-described shampoo sleeve 2〇 and the inner peripheral hole 19a of the male knife 28. The inner peripheral hole 19a has at least the same diameter as the portion into which the male knife 28 is inserted. When the female blade 19 is attached to the fixed mold 12, it is protruded toward the end of the cavity 14 at the inner peripheral portion of the front end surface of the cavity 14 to form an annular projection 30 which is fitted with the inner peripheral hole 19a. The annular projection 3' in the present embodiment has a height H (a dimension protruding toward the end of the cavity 14 of the annular projection W5 30) from the outer peripheral end surface i9b of the mother blade 19 is m. Further, the inner peripheral portion 30a of the annular projection 30 is provided with an inner peripheral hole 19a having a diameter equal to that of the main portion of the female blade 19. The radial direction 叽 on the top 3〇b of the annular projection 3〇 is 1〇. Further, the radial width W2 on the base portion 3〇c of the annular projection 3〇 is loovm. Further, the inclined surface 3〇d from the top portion 3〇b of the annular projecting portion 3 and the base portion 30c is a concave R surface toward the inner peripheral portion 30a end and the main body end of the female blade 19. In other words, the inclined surface is slowly inclined near the base portion 30c, and a curved surface having a small slope is formed near the top portion 3〇b. Further, the height Η of the annular projection 30 is higher than the height A1 of the burr A1 formed between the male knife 28 1289500 and the female blade 19 at the time of molding, and further, as long as - does not hinder the molten resin from the gate It flows to the cavity 14. In other words, the height of the annular projection is 3G"m to, but preferably to about 7 G//m. Further, the top width W1 of the annular projection is preferably 6//111 to 2 〇 Am. Because the width W1 of the wide width is wider than this, the gap between the burr A1 and the main body of the optical disc substrate is formed, so that the burr A1 is easily broken, and in addition, the wear of the female knives during processing or forming is used. It is not appropriate when the top is wide and too large. Further, since the miscellaneous protrusion portion is not clearly wide, it can be connected to the inclined surface having a small slope. Further, in terms of the width W2 of the base portion of the annular projection, it is preferably from about 80/m to about 12 ft/m. Further, the inclined surface may be composed of a tapered surface. Further, the above dimensions are the dimensions at normal temperature, not the dimensions at the time of forming. Further, the material of the mother blade 19 is stainless steel, but depending on the case, it is possible to contact the entire surface of the mother resin molten resin or only the annular projection.
Tin、鍍鉻等耐摩耗加工。 • 町將說明本發明的光碟基板成形方法、及貼合光碟某Tin, chrome and other wear-resistant processing. • The town will explain the method of forming the optical disk substrate of the present invention, and attaching the optical disk to a certain
^六六1、棋以形成出可改 變容積的空腔14，再從未揭示在具圖式的射雌置，藉㈣ o u^六六一1, Chess to form a cavity 14 with a variable volume, which has never been revealed in the figure, and (4) o u
再將熔融樹脂壓縮於空腔14内 出可動模具13的喷射套管27、 。因此本實施形態中，在射 與固定模具12環狀突起部 30的頂部30b時的間隔，會比結束成形時的間隔寬。接下 1289500 來趁空腔14内熔融樹脂尚未完成冷卻固化前，藉由驅動 未揭不在圖式的驅動裝置，將配設於可動模具13的公刀 28 ’刖進插入於前述母刀19的内周孔19a内以進行膠口切 -斷。此時，公刀28則從母刀19環狀突起部30頂部30b起 100# m至300#m左右，插入於澆口套2〇端。包含環狀突 起部30内周部3〇a的母刀19内周孔19a、與公刀28外周部 28a會形成出在插入公刀28時不造成卡住的間隔。接下來， φ 插入前述公刀28時，環狀突起部30内周部30a與公刀28 外周部28a之間會形成出毛邊A1。但本實施形態屬於，毛邊 A1是從母刀19環狀突起部3〇的頂部3〇b、與公刀洸外周 部28a呈對置的部分開始，朝澆口套2〇端形成出約邠“㈤ 高度。但本實施形態中的環狀突起部3〇高度為6〇#m，因 此即使毛邊A1形成出20//m的高度，也會如圖3所示，毛 邊A1的高度會低於透過插入閘門18空腔14面、與母刀a 偏靠外周的前端面19b所形成的光碟基板A的中央區面A2 • (位於和訊號面A5呈對置面的内周端平面）高度。尤其是 本發明的環狀突起部30頂部30b只有1 〇 # m，且傾斜面3^d 朝向内周部30a端及母刀19主體端呈凹狀{^面。反之，在 光碟基板A中心開口 A3端則呈凸狀尺面八4，而可更進一 + 保護毛邊A1。 ' 接下來，已成形的光碟基板A會被運往後續工程，經過 對訊號面A5進行鋁蒸鍍等工程後，則用黏著劑和其他光^ 基板貼合在4，以製造出貼合_ #柄。此時、，因光碟 11 1289500 基板A中心開口 A3端上所形成的毛邊A1高度，低於光碟基 板A中央區面A2的高度，因此直到貼合前會凹折以附著於 訊號面A5，故幾乎不發生不良光碟。再者，本實施形態有針 對齡光碟進行記載，但也可減少不執行⑶等貼合的光碟， 在後續工程因附著毛邊所發生的不良品。 此外:雖然本發明並未逐一列舉，但並未限定於上述的 本實％形態’唯熟習該項技術者可沿襲本發明主旨加以變更 鲁 /、運用、本實施开應已說明將打印器Μ安裝於可動模具 13，但並未限定有無打印器、及可安裝打印器的模具。接下 來，將打印器24安裝於可械具13時，成形後的光碟基板 A疋將减面A5朝上面；形成毛邊A1面朝下面放置，但因 毛邊A1和載置部互不接觸，因此具有毛邊…不受損的優 點。此外’將打印器安裝於固定模具時，將訊號面與形成毛 邊面朝上賊置後，再讓形成毛邊面錄下面，而與其他光 碟基板貼合。此時則具有毛邊們互不接觸、也不破損、及不 • 造成障礙的優點，還可縮窄光碟基板們的貼合間隔。 1289500 【圖式簡單說明】 圖1是本實施形態的光碟基板成形模具的重要部位剖面 圖。 圖2是本實施形態的光碟基板成形模具上的母刀放大剖 面圖。 圖3是本實施形態藉由光碟基板成形模具，所成形的光 碟基板中心開口附近的剖面圖。 【主要元件符號說明】Further, the molten resin is compressed into the cavity 14 to eject the injection sleeve 27 of the movable mold 13. Therefore, in the present embodiment, the interval at which the top portion 30b of the annular projection portion 30 of the fixed mold 12 is shot is wider than the interval at which the molding is completed. After the 1289500 is opened, the molten resin in the cavity 14 is not cooled and solidified, and the male knife 28 disposed in the movable mold 13 is inserted into the mother knife 19 by driving the driving device not shown. The inside of the inner peripheral hole 19a is used for cutting and breaking the glue. At this time, the male blade 28 is inserted from the top 30b of the annular projection 30 of the female blade 19 from about 100#m to about 300m, and is inserted into the end of the sprue bushing 2. The inner peripheral hole 19a of the female blade 19 including the inner peripheral portion 3'' of the annular projecting portion 30 and the outer peripheral portion 28a of the male blade 28 form an interval which does not cause a jam when the male blade 28 is inserted. Next, when φ is inserted into the male blade 28, a burr A1 is formed between the inner peripheral portion 30a of the annular projection 30 and the outer peripheral portion 28a of the male blade 28. However, in the present embodiment, the burr A1 is formed from the top portion 3b of the annular projection 3' of the female blade 19 and the portion facing the outer peripheral portion 28a of the male blade, and is formed at the end of the sprue bushing 2 "(5) Height. However, the height of the annular projection 3〇 in the present embodiment is 6〇#m. Therefore, even if the burr A1 is formed at a height of 20/m, the height of the burr A1 will be low as shown in FIG. The height of the central portion A2 of the optical disk substrate A formed by the front end surface 19b of the outer surface of the cavity 14 which is inserted into the cavity 14 of the shutter 18, and the height of the inner peripheral end surface (opposite to the signal surface A5) In particular, the top portion 30b of the annular projection 30 of the present invention has only 1 〇#m, and the inclined surface 3^d faces the inner peripheral portion 30a end and the main end of the female blade 19 has a concave shape. On the optical disk substrate A The center opening A3 end has a convex scale surface of 8 and 4, and can further add a + protection burr A1. ' Next, the formed optical disc substrate A will be transported to the subsequent project, after the aluminum vapor deposition on the signal surface A5. Then, the adhesive is bonded to the other optical substrate at 4 to make a fitting _ #handle. At this time, due to the disc 11 1289500 base The height of the burr A1 formed on the end of the center opening A3 of the panel A is lower than the height of the central area A2 of the optical disc substrate A, so that it is concavely folded to adhere to the signal surface A5 until it is bonded, so that no bad optical disc occurs. Although the present embodiment has been described with respect to an optical disc, it is also possible to reduce a defective optical disc that does not perform the bonding of (3) or the like, and which is defective in the subsequent process due to the attachment of the burr. Further, although the present invention is not enumerated one by one, it is not limited The above-mentioned actual % form can only be changed according to the gist of the present invention. The application and the present embodiment have been described to mount the printer Μ to the movable mold 13, but the printer is not limited. And a mold for mounting the printer. Next, when the printer 24 is mounted on the implement 13, the formed optical disc substrate A has a reduced surface A5 facing upward; the burr A1 is formed facing downward, but due to the burr A1 and The mounting parts do not touch each other, so there is an advantage that the burrs are not damaged. In addition, when the printer is mounted on the fixed mold, the signal surface is formed with the burr facing up, and then the burr is recorded. And it is bonded to other optical disc substrates. At this time, there is an advantage that the burrs do not touch each other, are not damaged, and do not cause obstacles, and can narrow the fitting interval of the optical disc substrates. 1289500 [Simple description] Fig. 1 is a cross-sectional view showing an important part of an optical disk substrate molding die according to the embodiment of the present invention. Fig. 2 is an enlarged cross-sectional view showing a master blade of the optical disk substrate molding die according to the embodiment. A cross-sectional view of the vicinity of the center opening of the formed optical disc substrate. [Description of main component symbols]
11 光碟基板成形模具 12 固定模具 13 可動模具 14 空腔 15 固定模板 16 固定内板 17 固定鏡面板 18 插入閘門 19 母刀 19a 内周孔 19b 偏靠外周的前端面 20 澆口套 20a 前端面 21 可動模板 22 可動内板11 Disc substrate forming mold 12 Fixing mold 13 Movable mold 14 Cavity 15 Fixing template 16 Fixing inner plate 17 Fixing mirror panel 18 Inserting gate 19 Mother knife 19a Inner peripheral hole 19b Abutting the outer peripheral front end face 20 Sprue bushing 20a Front end face 21 Movable template 22 movable inner panel
13 1289500 23 可動鏡面板 24 打印器 25 内周打印器支撐座 26 固定套管 27 喷射套管 28 公刀 28a 外周部 29 突出插梢 30 壞狀突起部 30a 内周部 30b 頂部 30c 基礎部分 30d 傾斜面 A 光碟基板 A1 毛邊 A2 中央區面 A3 中心開口 A4 R面 A5 訊號面 Η 高度（向環狀突起部空腔端突出的尺寸） W1 寬幅（環狀突起部的頂部寬幅） W2 寬幅（環狀突起部基礎部分寬幅） 1413 1289500 23 movable mirror panel 24 printer 25 inner peripheral printer support 26 fixed sleeve 27 injection sleeve 28 male knife 28a outer peripheral portion 29 protruding insert 30 bad projection 30a inner peripheral portion 30b top portion 30c base portion 30d inclined Face A Disc substrate A1 Burr A2 Center area A3 Center opening A4 R side A5 Signal area 高度 Height (size protruding toward the cavity end of the annular protrusion) W1 Wide (top width of the annular protrusion) W2 Wide (The base part of the annular protrusion is wide) 14