1242541 玖、發明說明： 【發明所屬之技術領域】 、，本發明是有_—種成形裝置’特別是指—種適用於 成形雙凹面形玻璃鏡片的破璃模造成形裝置。 5 【先前技術】 如圖1、2所示，為習知一種用於成形雙凹面形玻璃 鏡片的模具，包含一套筒卜―定位於該套筒i内並具有 一可供-雙凹面形玻璃硝材4置放的塑形面2〇ι的下模仁 〕 2,及-可移動地套設於該套筒i内並具有一塑形面如 〕 的上模仁3。當該玻璃硝材4被放置於該下模仁2呈凸面 狀的塑形面201上後’在高溫模造過程甲該上模仁3可下 移至與該套筒i、該下模仁2配合形成一成形模穴$，則 該玻璃確材4即可在該成形模穴5内被加壓成形為一呈雙 面凹面形的玻璃鏡片6。 雖然，利用此種模具即可供該玻璃硝材4在該成形模 八5内被加壓成形為該玻璃鏡片6，但是，由於承載該玻 璃硝材4的下模仁2的塑形面2〇1是呈凸面狀，因此，如 圖3所示，在貫際生產時，該玻璃硝材4在置放過程中或 > 換具移載過程中（例如連續模的生產流程），均會極易發 生滑移或偏移的情形，而導致其中心位置偏離了該套筒i 的中心軸線位置，然而，此種模具在將該玻璃硝材4成形 為玻璃鏡片的過程中，並無法將該玻璃硝材4的中心位置 導正’因此’該玻璃硝材4往往會因位置偏移而被加壓成 形為一偏肉狀鏡片而成為不良品。再者，如圖4、5所示， 1242541 由=該下模仁2的塑形面2〇1是呈凸面狀，因此，就算改 用呈一凹一平面形的一玻璃硝材7或呈雙平面形的一玻璃 硝材8或其他面形的玻璃頌材，亦無法改善該等玻璃硝材 8或其他面形的玻璃硝材易於發生滑移或偏移現象的問 題，而，此亦即雙凹面形玻璃鏡片在實際製造時，遠較一 般雙凸或一凹一凸面形玻璃鏡片困難的主要原因。 10 15 此外，如圖2所示，由於在模造成形過程中，該玻璃 j片6的-斜周面6〇1在該成形模穴5内並沒有受到任何 實質上的偈限’而具有任意變形的自由度，因此在後續的鲁 冷卻收縮過程中’該斜周面6〇1即可能如圖6所示而發生 往該玻璃鏡片6的一凹面6〇2或另一凹φ 6〇3收縮的情 形’甚而是兩種收縮伴隨發生的情形，如此，該玻璃鏡片 6即可能發生形成雙重面或多重面的情形，或發生無法藉 由違上、下模仁3、2的表面面形來補償成形為所需的表 面面形的情形，而成為一不良品。 【發明内容】 四此，树明之目的，即在提供一種可平穩地承载玻 璃確材’且在組立時可自動導正玻璃石肖材的中心位置，並 在成形時可對鏡片產生適當㊣限的麵模造成形裝置。 、本發明玻璃模造成形裝置，是可用於將一玻璃硝材成 型為-玻璃鏡片，包含—下套筒、—上套筒、—下模仁， 及-上模仁。該下套筒具有—第—周壁，及—由該第一周 壁所圍繞界定出的第一内孔，該第_周壁具有一第—内周 面及-第-抵接面，該第—内孔具有—由該第—内周面的 20 1242541 一第一導引面部所圍繞界定出的繁 的弟一截頭圓錐段。該上套 筒具有一第二周壁，及一由該第_ 食 弟一周壁所圍繞界定出的第 内孔，該第二周壁具有一第 周面及一朝向該第一抵 5 10 15 {/4 · W 口_丨____ 夺 接面的第二抵接面，該第二内孔具有—由該_二__ -第二導引面部所圍繞界定出的第二截頭圓錐段，哼第二 截頭圓錐段是與該第一載頭圓錐段相對設置，且該第— 二截頭圓錐段的孔徑Μ朝另—者遞增。該下模=是套接 於該第-内孔’具有-延伸至該第—截頭圓錐段内並呈凸 面狀的第-塑形面。該上模仁是套接於該第二内孔，而可 在一遠離該下模仁的第一位置與一靠近該下模仁的第二 位置之間移動，該上模仁具有一朝向該第一塑形面的第二 塑形面，當該下、上套筒的1—、二抵接面互相抵接且該 上模仁移動至該第二位置時’該第―、二塑形面與該第 -、一導引面部相配合可界定出—可供該玻璃石肖材成形為 該玻璃鏡片的成形模穴。【實施方式】 有關本發明之前述及其他技術内容、特點與功效，在 以下配合參考圖式之一較佳實施例的詳細說明中，將可清 楚的明白。 參閱圖7,本發明玻璃標造成形裝置的一較佳實施 例，是可用於將一雙凹面形玻璃硝材1〇〇成型為一雙凹面 形玻璃鏡片200 (見圖1〇)，該成形裝置包含：一下套筒 10、一上套筒20、一下模仁30，及一上模仁4〇。 邊下套筒10具有一第一周壁Π、一由該第一周壁u 20 1242541 所圍繞界定出的第一内孔12，及一保護膜。 5 10 15 土 I、有一苐一内周面ln及一第一抵接面112，該第一 内孔12具有一由該第一内周面Ul的一第一導引面部 :⑴所圍繞界定出的第一截頭圓錐段12卜一朝向該上套 同2〇且與該第一截頭圓錐段121具有最大孔徑的一端連 接的大孔徑段丨22,及_相反於該上套筒2()且與該第一截 頭圓錐& 121纟有最小孔徑的一端連接的小孔徑段123。 該第一抵接面112即是界定於該大孔徑段122與該第一截 頭圓錐& 121之間，該保護膜13是鍍設於該第一導引面 邛1111上，且在本實施例中，該保護膜13是由具耐磨耗 ^低摩擦係數與馬抗高溫氧化性的材質製成。當該玻璃 :材1〇〇承載於該下模仁30上時，該第一導引面部uii 疋可與该破璃硝材1〇〇的底周緣互相抵接。 该上套筒20具有一第二周壁21、一由該第二周壁21 所圍繞界定出的第二内孔22,及-保護膜23。該第二周 ，21具有一第二内周面2U、一朝向該第一抵接面112的 第一抵接面212、一相反於該下套筒1〇的大徑部213，及 一朝向該下套筒10且外徑對應於該第一内孔12的大孔徑 奴122的孔徑的小徑部214，該第二抵接面212即是形成 於該小徑部214朝向該下套筒1〇的底端上。該第二内孔 22具有一由該第二内周面211的一第二導引面部所 圍繞界定出的第二截頭圓錐段221、一相反於該下套筒1〇 的第一套接段222、一孔徑小於該第一套接段222的孔徑 且與該第二截頭圓錐段221具有最小孔徑的一端連接的第 20 1242541 5 套接奴223 ’及一界定於該第一、二套接段222、223之 間的肩部224。在本實施例中，該第二截頭圓錐段221是 與該第一截頭圓錐段121呈相對設置，且該第一、二戴頭 圓錐& 121、221的孔控是互朝另一者遞增。該保護膜23 ^4引面部2111 i，且在本實施例中，該 ” I膜23疋由具耐磨耗性、低摩擦係數與高抗高溫氧化 性的材質製成。 10 15 旲- 〇疋套接於該第一内孔12，並具有一可套 接於该第-内孔12的小孔徑段123内的安裝部μ、一與 该安裝部31連接而可抵接於該第—周壁11的-底端面上 '艮位4 32、-與該絲部31 $接而延伸至該第一内孔 2的第-截頭圓錐段121内的第—成形部33，及一形成 的：第-成形部33朝向該上套筒2〇的一端上並呈凸面狀 弟一塑形面34。該第—塑形面34是可承載該玻璃硝材 土 〜J狀切吧贫接於該第二内孔22，而 在一运離該下模仁3〇的篦一 模no的笛/置（見圖9)與一靠近該 有一叮“彳置（見圖10)之間移動。該上模仁40 有-可套接於該第二内孔22的第一套接 安裝部41、一與該第一安 、弟 内孔22㈣：套接段223㈣ ^接於，亥弟 二安裝部42連接而延伸至#第^以42、一與該 奴221内的第二成 μ Mm, 朝向兮第输/ 4 3及—形成於該第二成形部4 钥Π省弟一塑形面34的一 而上亚王凸面狀的第二塑形石 20 1242541 44 〇 回 所示，貫際進行成形操作時，是分別將該 -套筒1〇與該下模仁30組立及將該上套筒20與該上模 5 彳_ 4〇組立，亚將該玻璃硝材1〇〇放置於該下模仁30的第 ^面34上，此時，該第一導引面部1111可與該玻璃 ㈣⑽的底周緣互相抵接，因此，該第一塑形面34可 平穩地承載住該破璃硝材100,然後，如圖8、9所示，即 可=藉由人工或機械夾爪（圖未示）抓取該上套筒20的、 1〇 幻空部213的頂端，而將該上套筒20的小徑部214下移·· 組入該下套筒ίο的第一内孔12的大孔徑段122内，在此 過程中，該上模仁40的第二塑形面44會抵止於該玻璃硝 材100的頂面上，而使該上模仁4〇停留於遠離該下模仁 30的第-位置’而，#該上套筒2()下移至該第一、二抵 接面112、212互相抵接時，該第二導引面部2111則會與 5 4玻璃硝材1GG的頂周緣接觸。此後，如圖10所示，在 進行高溫模造的過程中，當該上模仁40從該第一位置被 下壓至靠近該下模仁3〇的第二位置時，該第一、二塑形籲· 面34、44與該第一、二導引面部1111、2111相配合可界 -定出一成形模穴50，如此，該第二塑形面44即可在該成 ί〇 形模穴50内將軟化的玻璃硝材100加壓成形為呈雙凹面 形的該玻璃鏡片200。 此外，如圖11、12、13所示，當該玻璃硝材1 〇〇在 置放過程中或模具移載過程中（例如連續模的生產流 程），發生中心位置偏離該下套筒1〇的中心軸線位置的情 10 1242541 形日守’由於該上套筒20的第二内周面21丨形成有錐面狀的 第二導引面部2111，因此，在該上套筒2〇下移的過程中， 該導引面部2111可與該玻璃硝材1〇〇的頂周緣接觸，並藉 侧向力將該玻璃硝材1 00朝該下套筒1 〇的中心軸線位置 5 推移，而將該玻璃硝材100導正至該下套筒10的中心軸 線位置上或極度接近該下套筒10的中心軸線的位置上， 如此，該玻璃硝材1〇〇即可供在後續的高溫模造過程中， 被加壓成形為如圖1 〇所示的玻璃鏡片2 〇 〇。 經由以上的說明，可再將本發明的優點歸納如下： 本杳明的下套笱10的第一内周面形成有錐面 狀的第一導引面部lln，因此，當該玻璃硝材100被置放 於該下模仁30的第一塑形面34上時，該第一導引面部 1111即可與該玻璃硝材100的底周緣互相抵接，而可協助 該第一塑形面34平穩地承載住該玻璃硝材1〇〇，進而防止 15 财璃頌材_相對該第-塑形面34發生滑移或偏移的 情形，如此，本發明不僅可有效避免該玻璃硝材1〇〇在置 放過程中或模具移載過程中，發生中心位置偏離的問題， 亦可適用於各種不同面形的玻璃碗材。 一、此外，本發明在該下、上套筒10、20的組接過 20 程中，利用該上套筒20的第二導引面部2111可自動導正 偏離該下㈣10的巾，線位置的麵储⑽，而追使 該玻璃硝材100移動至適當的模造成形位置上，如此，就 算該玻璃硝材100在置放過程中或模具移載過程中，發L 了中心位置偏離的情形，本發明亦可自動將該破璃硝材 1242541 100的中心位置導正。因此，本發明最終均可有效避免該 玻璃硝材100因成形位置不正而成形為一偏肉鏡片，而大 幅提高製造雙凹面形玻璃鏡片的產品良率。 二、本發明藉由該第一、二塑形面34、44與該第一、 二導引面部1111、2111可界定出具侷限性的成形模穴5〇, 因此，在咼溫模造過程中，當軟化的玻璃硝材受壓而 往外擠出時，該第一、二導引面部llu、2111可分別迫 使玻璃硝材100的周緣部份，沿著其錐度而向下、向上擴 展而轉印形成為該玻璃鏡片200的一下斜周面21〇與一上 斜周面上（見圖1 0 )’如此，在後續的冷卻收縮過程中， 由於該第一、二導引面部1111、2111仍與該下、上斜周 面210、220保持接觸，而使該下、上斜周面21〇、220受 到貫質上的侷限，因此，本發明不僅可降低該玻璃鏡片2〇〇 冷部收縮的自由度，更可有效防止該玻璃鏡片2〇〇在冷卻 收縮過程中產生無法控制的收縮變形。 歸納上述，本發明之玻璃模造成形裝置，不僅可平穩 地承載玻璃硝材，以有效地防止玻璃硝材的中心位置偏 私更可在套筒組立時自動導正玻璃硝材的中心位置，且 在玻璃鏡片冷卻收縮時可對玻璃鏡片產生適當的侷限作 用而可有效防止玻璃鏡片產生無法控制的收縮變形，故 確實能達到發明之目的。 惟以上所述者，僅為本發明之較佳實施例而已，當不 能以此限定本發明實施之範圍，即大凡依本發明申請專利 範圍及創作說明書内容所作之簡單的等效變化與修飾，皆 12 1242541 仍屬本發明專利涵蓋之範圍内。 5 10 15 20 13 1242541 【囷式簡單說明】 圖1是習知一種玻璃成形模具與一雙凹面形玻璃硝材 的組合剖視圖； 圖2是一類似圖1的視圖，說明該玻璃硝材被加壓成 形為一玻璃鏡片； 圖3是一類似圖1的視圖，說明該玻璃硝材的中心位 置偏離該模具的中心軸線位置； 圖4是一類似圖1的視圖，說明一呈一凹一平面形的 玻璃硝材的中心位置偏離該模具的中心軸線位置； 籲 圖5是一類似圖1的視圖，說明一雙平面形的玻璃硝 材的中心位置偏離該模具的中心軸線位置； 圖6是圖2中該玻璃鏡片冷卻收縮的變形示意圖； 圖7疋本發明之玻璃模造成形裝置一較佳實施例與一 雙凹面形玻璃硝材的剖視圖； 圖8疋一類似圖7的視圖，說明該較佳實施例的一上 套筒下移而與一下套筒組接； 圖9是一類似圖7的視圖，說明該較佳實施例的上套鲁 筒下移而與該下套筒組接至定位； 圖1〇是一類似圖7的視圖，說明該較佳實施例的一 上模仁下移而將該玻璃硝材加壓成形為一玻璃鏡片； 囷11疋類似圖7的視圖，說明該玻璃硝材的中心 位置偏離該下套筒的中心軸線位置； 圖12是一類似圖u的視圖，說明該上套筒下移至與 該玻璃硝材的頂周緣接觸；及 14 1242541 圖13是一類似圖11的視圖，說明該上套筒下移至將 該玻璃頌材導正。 15 1242541 【圖式之主要元件代表符號簡單說明】 1 ·… 套筒 121 · 第一截頭圓錐段 2 *… 下模仁 122 · 大孔徑段 201 · 塑形面 123 * 小孔徑段 3…* 上模仁 13… 保護膜 301 * 塑形面 20 · · 上套筒 4 * » ► 玻璃硝材 21… 第二周壁 5 *… 成形模穴 211 · 第二内周面 6 * * 玻璃鏡片 2111 · 第二導引面部 601 · 斜周面 212 · 弟《—抵接面 602， 凹面 213 · 大徑部 603 * 凹面 214 * 小徑部 Ί 玻璃确材 、22 · · 第二内孔 8 *… 玻璃頌材 221 · 第二截頭圓錐段 100 · 玻璃确材 222 · 第一套接段 200 * 玻璃鏡片 223 * 第二套接段 210 * 下斜周面 224 · 肩部 220、 上斜周面 23… 保護膜 10… 下套筒 30… 下模仁 11… 第一周壁 31 · · 安裝部 111 ， 第一内周面 32… 限位部 111卜 第一導引面部 33… 第一成形部 112 · 第一抵接面 34 * * 第一塑形面 12… 第一内孔 40 · * 上模仁 16 1242541 41 . · 第一安裝部 42… 第二安裝部 43… 第二成形部 44… 第二塑形面 50… 成形模穴1242541 发明 Description of the invention: [Technical field to which the invention belongs], the present invention has a forming device ', especially a glass breaking mold forming device suitable for forming a double-concave glass lens. 5 [Prior art] As shown in Figs. 1 and 2, a mold for forming a double-concave glass lens is conventionally known, which includes a sleeve b-positioned in the sleeve i and having a double-concave shape. The lower mold core 2 of the plastic surface 2m placed on the glass nitrate 4], and the upper mold core 3 movably sleeved in the sleeve i and having a plastic surface such as]. When the glass nitrate material 4 is placed on the convex molding surface 201 of the lower mold core 2, the upper mold core 3 can be moved down to cooperate with the sleeve i and the lower mold core 2 during the high temperature molding process. When a forming cavity $ is formed, the glass material 4 can be press-formed into the glass cavity 6 having a double-sided concave shape in the forming cavity 5. Although the glass nitrate material 4 can be pressure-molded into the glass lens 6 in the forming mold 8 5 by using such a mold, the plastic molding surface 2 of the lower mold core 2 carrying the glass nitrate material 4 is formed. It is convex, so, as shown in Figure 3, during the interim production, the glass nitrate material 4 will be extremely easy to place during the placement process or > the tool change process (such as the production process of continuous molds). Slippage or displacement occurs, which causes its center position to deviate from the center axis position of the sleeve i. However, in the process of forming this glass nitrate material 4 into a glass lens, this mold cannot be used to form the glass nitrate material. The center position of 4 is correct. Therefore, the glass nitrate material 4 is often pressurized and formed into a partial fleshy lens due to the position deviation, and becomes a defective product. In addition, as shown in FIGS. 4 and 5, 1242541 = the molding surface 2101 of the lower mold core 2 is convex, so even if a glass nitrate material 7 having a concave shape and a flat shape is used, A flat glass nitrate 8 or other planar glass chanting materials can not improve the problem that the glass nitrate 8 or other planar glass nitrates are prone to slip or shift, and this is also a double concave shape. The main reason why glass lenses are more difficult to manufacture than biconvex or concave-convex glass lenses in actual manufacture. 10 15 In addition, as shown in FIG. 2, during the forming process, the-oblique peripheral surface 601 of the glass sheet 6 is not subject to any substantial restrictions in the forming cavity 5 and has an arbitrary value. Degree of freedom of deformation, so in the subsequent Lu cooling contraction process, 'the inclined peripheral surface 601 may occur toward one concave surface 602 or another concave φ603 of the glass lens 6 as shown in FIG. 6. The "shrinking situation" is even a situation in which two kinds of shrinkage occur together. In this way, the glass lens 6 may form a double-sided or multi-sided situation, or it may not be possible to violate the surface shape of the upper and lower mold cores 3 and 2. In order to compensate for the formation of the required surface shape, it becomes a defective product. [Summary of the invention] Fourthly, the purpose of Shuming is to provide a surface that can smoothly carry the glass material, and can automatically guide the center position of the glass stone material when it is assembled, and can produce an appropriate limit surface for the lens during forming. Moulding device. The glass mold forming device of the present invention can be used to shape a glass nitrate material into a glass lens, which includes-a lower sleeve,-an upper sleeve,-a lower mold kernel, and-an upper mold kernel. The lower sleeve has a first peripheral wall and a first inner hole defined by the first peripheral wall. The first peripheral wall has a first inner surface and a first abutting surface. The inner hole has a complex frusto-conical section defined by a first guiding surface of 20 1242541 of the first inner peripheral surface. The upper sleeve has a second peripheral wall, and a first inner hole defined by the first _ idiot one week wall. The second peripheral wall has a first peripheral surface and a first abutment 5 10 15 {/ 4 · W 口 _ 丨 ____ The second abutment surface of the abutment surface, the second inner hole has a second frustoconical section defined by the _two__-second guide surface, hum The second frusto-conical section is disposed opposite to the first frusto-conical section, and the aperture M of the second frusto-conical section increases toward the other. The lower mold = is a first shaped surface that is sleeved in the -inner hole 'and has a convex shape extending into the -frustum-conical section. The upper mold core is sleeved on the second inner hole, and is movable between a first position away from the lower mold core and a second position close to the lower mold core. The upper mold core has a direction facing the When the first and second abutting surfaces of the lower and upper sleeves abut against each other and the upper mold core moves to the second position, the first and second shaping surfaces are shaped. The surface cooperates with the first and the first guiding surface to define a glass cavity that can be formed into the glass lens. [Embodiment] The foregoing and other technical contents, features, and effects of the present invention will be clearly understood in the following detailed description of a preferred embodiment with reference to the accompanying drawings. Referring to FIG. 7, a preferred embodiment of the glass forming device according to the present invention is used to form a double concave glass glass material 100 into a double concave glass lens 200 (see FIG. 10). The forming device It includes: a lower sleeve 10, an upper sleeve 20, a lower mold core 30, and an upper mold core 40. The under sleeve 10 has a first peripheral wall Π, a first inner hole 12 defined by the first peripheral wall u 20 1242541, and a protective film. 5 10 15 soil I, an inner peripheral surface ln and a first abutting surface 112, the first inner hole 12 has a first guiding surface defined by the first inner peripheral surface Ul: ⑴ surrounded by The first frusto-conical section 12 is a large-aperture section 22 facing the upper sleeve and connected to the end of the first frusto-conical section 121 having the largest aperture 22, and _ opposite to the upper sleeve 2 () And a small aperture section 123 connected to the end of the first truncated cone & The first abutment surface 112 is defined between the large-aperture section 122 and the first truncated cone & 121. The protective film 13 is plated on the first guide surface 邛 1111, and is In the embodiment, the protective film 13 is made of a material with abrasion resistance, low friction coefficient, and horse resistance to high temperature oxidation. When the glass material 100 is carried on the lower mold core 30, the first guiding surface uii 疋 and the bottom peripheral edge of the broken glass nitrate material 100 can abut each other. The upper sleeve 20 has a second peripheral wall 21, a second inner hole 22 defined by the second peripheral wall 21, and a protective film 23. In the second cycle, 21 has a second inner peripheral surface 2U, a first abutting surface 212 facing the first abutting surface 112, a large diameter portion 213 opposite to the lower sleeve 10, and a direction The lower sleeve 10 has a small diameter portion 214 having an outer diameter corresponding to the diameter of the large bore 122 of the first inner hole 12. The second abutting surface 212 is formed on the small diameter portion 214 toward the lower sleeve. 10 on the bottom end. The second inner hole 22 has a second frusto-conical section 221 defined by a second guiding surface of the second inner peripheral surface 211 and a first socket opposite to the lower sleeve 10. Section 222, a 201242541 5 socket 223 'having an aperture smaller than that of the first socket section 222 and connected to the end of the second truncated cone section 221 having the smallest aperture, and a socket 223' defined by the first and second sections A shoulder 224 between the socket sections 222 and 223. In this embodiment, the second frusto-conical section 221 is disposed opposite to the first frusto-conical section 121, and the hole control of the first and second frusto-cones & 121, 221 faces each other. Or increase. The protective film 23 ^ 4 leads 2111 i, and in this embodiment, the "I film 23" is made of a material with abrasion resistance, low friction coefficient, and high temperature oxidation resistance. 10 15 旲-〇疋 is sleeved on the first inner hole 12 and has a mounting portion μ which can be socketed in the small-diameter section 123 of the first-inner hole 12, and a connection portion which is connected to the mounting portion 31 and can abut the first- On the bottom end surface of the peripheral wall 11, the position 4 32 is connected to the wire portion 31 and extends to the first forming portion 33 in the first truncated cone section 121 of the first inner hole 2, and a formed portion : The first-shaped portion 33 faces the end of the upper sleeve 20 and has a convex-shaped plastic-shaped surface 34. The first-shaped surface 34 is capable of carrying the glass nitrate soil ~ a J-shaped cut bar is connected to the The second inner hole 22 is moved between a flute / set (see FIG. 9) of the 篦 一 模 no which is transported away from the lower mold core 30 and a 彳 ”set (see FIG. 10). The upper mold core 40 has a first socket mounting portion 41 that can be socketed to the second inner hole 22, and a first socket and the inner hole 22㈣: the socket section 223 接. The part 42 is connected to extend to # 第 ^ 以 42, one with the second in the slave 221 μ Mm, facing the first / 4 3 and-formed in the second forming part 4 key Π shape the first shape surface As shown in Figure 34, the second convex stone 20 1242541 44 of the upper king is convex. When performing the forming operation, the sleeve 10 and the lower mold core 30 are respectively assembled and the upper mold 30 is assembled. The sleeve 20 is assembled with the upper mold 5 彳 _40, and the glass nitrate 100 is placed on the third surface 34 of the lower mold kernel 30. At this time, the first guide surface 1111 can be connected with the glass The bottom peripheral edges of the cymbals abut each other. Therefore, the first shaping surface 34 can smoothly carry the broken glass nitrate material 100. Then, as shown in FIGS. (Not shown) Grab the top end of the 10 hollow space 213 of the upper sleeve 20, and move the small diameter portion 214 of the upper sleeve 20 down into the first inner hole 12 of the lower sleeve Within the large aperture section 122, here In the process, the second molding surface 44 of the upper mold core 40 will abut against the top surface of the glass nitrate 100, so that the upper mold core 40 stays at the-position away from the lower mold core 30 'and # When the upper sleeve 2 () moves down to the first and second abutment surfaces 112 and 212 abut against each other, the second guide surface 2111 will contact the top peripheral edge of the 5 4 glass nitrate 1GG. Thereafter, as shown in FIG. 10, during the high temperature molding process, when the upper mold core 40 is pushed down from the first position to a second position close to the lower mold core 30, the first and second molds The shape appealing surfaces 34, 44 cooperate with the first and second guide surfaces 1111, 2111 to define a forming mold cavity 50. In this way, the second shaping surface 44 can be formed in the shape of the mold. In the cavity 50, the softened glass nitrate material 100 is press-molded into the glass lens 200 having a double concave shape. In addition, as shown in Figs. 11, 12, and 13, when the glass nitrate 100 is placed or the mold is being transferred (for example, the production process of a continuous mold), the center position of the lower glass sleeve 10 deviates. The position of the center axis 10 1242541 The shape of the sun guard 'Since the second inner peripheral surface 21 of the upper sleeve 20 is formed with a tapered second guide surface 2111, the upper sleeve 20 moves downward. In the process, the guide surface portion 2111 can contact the top peripheral edge of the glass nitrate material 100, and the glass nitrate material 100 is moved toward the center axis position 5 of the lower sleeve 10 by a lateral force, and the glass The nitrate material 100 is guided to the position of the central axis of the lower sleeve 10 or extremely close to the position of the central axis of the lower sleeve 10. In this way, the glass nitrate material 100 can be used in the subsequent high-temperature molding process. Press-molded into a glass lens 2000 as shown in FIG. Through the above description, the advantages of the present invention can be summarized as follows: The first inner peripheral surface of the lower casing 10 of the present invention is formed with a tapered first guide surface 11n. Therefore, when the glass nitrate 100 is When placed on the first shaping surface 34 of the lower mold core 30, the first guide surface portion 1111 can abut against the bottom peripheral edge of the glass nitrate 100, thereby helping the first shaping surface 34 to stabilize Ground the glass nitrate material 100, thereby preventing the 15 glass glory material _ from slipping or offsetting with respect to the first shaping surface 34. Thus, the present invention can not only effectively avoid the glass nitrate material 100 The problem of deviation of the center position during the placing process or the mold transfer process can also be applied to glass bowls with various surface shapes. 1. In addition, in the present invention, the second guide surface 2111 of the upper sleeve 20 can be used to automatically correct the towel and line position deviating from the lower chin 10 during the 20th process of the assembly of the lower and upper sleeves 10 and 20. The glass nitrate material 100 is stored, and the glass nitrate material 100 is moved to an appropriate molding position. In this way, even if the glass nitrate material 100 is deviated from the center position during the placing process or the mold transfer process, the present The invention can also automatically correct the center position of the broken glass nitrate material 1242541 100. Therefore, the present invention can effectively prevent the glass nitrate material 100 from being formed into a skewed lens due to an incorrect forming position, and greatly improve the product yield of manufacturing a double-concave glass lens. 2. In the present invention, the first and second shaping surfaces 34 and 44 and the first and second guide surfaces 1111 and 2111 can define a limited forming mold cavity 50. Therefore, in the high temperature molding process, When the softened glass nitrate material is squeezed out, the first and second guide surfaces 11u and 2111 can respectively force the peripheral edge portion of the glass nitrate material 100 to expand downward and upward along the taper and transfer to form The lower oblique peripheral surface 21 and the upper oblique peripheral surface of the glass lens 200 (see FIG. 10). Thus, in the subsequent cooling and shrinking process, since the first and second guide surfaces 1111 and 2111 are still connected to the The lower and upper oblique peripheral surfaces 210 and 220 are kept in contact, and the lower and upper oblique peripheral surfaces 21 and 220 are subject to qualitative limitations. Therefore, the present invention can not only reduce the freedom of contraction of the cold part of the glass lens 200 Degree, it can effectively prevent the glass lens 200 from generating uncontrollable shrinkage deformation during the cooling shrinkage process. To sum up, the glass mold forming device of the present invention can not only smoothly carry the glass nitrate, so as to effectively prevent the center position of the glass nitrate from becoming private, but also automatically guide the center position of the glass nitrate when the sleeve is assembled, and cool the glass lens. When shrinking, it can appropriately limit the glass lens and can effectively prevent the glass lens from generating uncontrollable shrinkage and deformation, so it can indeed achieve the purpose of the invention. However, the above are only the preferred embodiments of the present invention. When the scope of implementation of the present invention cannot be limited in this way, that is, the simple equivalent changes and modifications made according to the scope of the patent application and the content of the creation specification of the present invention, Both 12 1242541 still fall within the scope of the invention patent. 5 10 15 20 13 1242541 [Simplified description of 囷 style] Fig. 1 is a conventional sectional view of a conventional glass forming mold and a double concave glass nitrate; Fig. 2 is a view similar to Fig. 1 showing that the glass nitrate is press-formed Is a glass lens; FIG. 3 is a view similar to FIG. 1, illustrating that the center position of the glass nitrate is deviated from the center axis position of the mold; FIG. 4 is a view similar to FIG. 1, illustrating a concave-flat glass The center position of the nitrate material is deviated from the center axis position of the mold; FIG. 5 is a view similar to FIG. 1, illustrating that the center position of a bi-planar glass nitrate material is deviated from the center axis position of the mold; FIG. 6 is the glass in FIG. 2. Deformation schematic diagram of lens cooling shrinkage; Figure 7: A cross-sectional view of a preferred embodiment of a glass molding device of the present invention and a double-concave glass nitrate; Figure 8: A view similar to Figure 7 illustrating a preferred embodiment of the preferred embodiment; The upper sleeve is moved down to be connected to the lower sleeve group; FIG. 9 is a view similar to FIG. 7, illustrating that the upper sleeve of the preferred embodiment is moved down and connected to the lower sleeve group to position; FIG. 10 Yes A view similar to FIG. 7 illustrates that an upper mold core of the preferred embodiment is moved downward to press-mold the glass nitrate into a glass lens. 囷 11 疋 A view similar to FIG. 7 illustrates the deviation of the center position of the glass nitrate The position of the central axis of the lower sleeve; Figure 12 is a view similar to Figure u, illustrating that the upper sleeve is moved down to contact the top peripheral edge of the glass nitrate; and 14 1242541 Figure 13 is a view similar to Figure 11, illustrating The upper sleeve is moved down to guide the glass material. 15 1242541 [Simplified explanation of the main symbols of the drawings] 1 · ... Sleeve 121 · First frustoconical section 2 * ... Lower mold core 122 · Large aperture section 201 · Shaping surface 123 * Small aperture section 3 ... * Upper mold core 13… Protective film 301 * Shaping surface 20 · · Upper sleeve 4 * »► Glass nitrate 21… Second peripheral wall 5 *… Mold cavity 211 · Second inner peripheral surface 6 * * Glass lens 2111 · No. Second guide surface 601 · Inclined peripheral surface 212 · Brother "— abutment surface 602, concave surface 213 · large diameter portion 603 * concave surface 214 * small diameter portion Ί glass material, 22 · · second inner hole 8 * ... glass 221 · The second frustoconical section 100 · The glass material 222 · The first set of joints 200 * glass lens 223 * the second set of joints 210 * the lower inclined peripheral surface 224 · the shoulder 220, the upper inclined peripheral surface 23 ... Protective film 10 ... Lower sleeve 30 ... Lower mold core 11 ... First peripheral wall 31 ... Mounting portion 111, first inner peripheral surface 32 ... Limiting portion 111 First guiding surface 33 ... First forming portion 112 ... First abutment surface 34 * * First shaping surface 12 ... First inner hole 40 · * Upper die 16 1242541 4 1. · 1st mounting part 42 ... 2nd mounting part 43 ... 2nd forming part 44 ... 2nd shaping surface 50 ... forming cavity