200922769 九、發明說明： 【發明所屬之技術領域】 本發明涉及一種模具，尤其涉及一種用於成型光學鏡 片之模具。 【先前技術】 注塑成型技術係將注塑模具裝設於成型機上，控制該 注塑模具中之壓力與溫度，使融熔之塑膠注入該注塑模具 中，最終經冷卻固化以成型出塑膠製品。注塑成型技術具 有成型速度快，一次成型之特點。模具之製造方法請參閱 Tseng等人於1990年IEEE系統、智慧控制國際會議（1990 IEEE International Symposium on Intelligent Control)上發表 之論文 Knowledge-based mold design for injection molding processing o 採用傳統之注塑模具製造光學鏡片時，由於模具加工 精度及成型機合模之精度有限，該模具之公模與母模合模 時，兩者之間容易出現偏差，製造出來之光學鏡片兩側之 兩非球面不可避免地存於一定之偏心度，即光學鏡片之兩 非球面之幾何中心線不重合，存在一定偏差，造成成型之 光學鏡片之光軸與其幾何中心線不重合。 如圖1所示之一種習知之注塑模具10，其包括一公模 11與一母模12，分別設置於一公模座111與一母模座121 上。該公模11與該母模12分別具有一第一成型曲面112 與一第二成型曲面122。該公模11與該母模12合模時構成 一成型空間（未標示），用於成型該光學鏡片13,該第一成 6 200922769 1曲面112與第一成型曲面122分別用於成型該光學鏡片 13兩側之兩非球面。 圖1給出之模具10之母模11與公模12為合模狀態， 該第-成型曲面112與—第二成型曲面122之幾何中心線 發生偏差即產生—偏差量^ H’使得成型之光學鏡 片兩側之兩非球面之幾何中心線之間亦產生-偏差量r 是故採用該模具10所製造出之光學鏡片為不合格鏡片。 可見，傳統之注塑模具精度較低，不適於用以製造對 偏心敏感度極高之高級鏡片。 【發明内容】 有馨於此，提供一種能夠消除光學鏡片成型過程中產 生之偏心問題之高精度模具實為必要。 本發明提供-種模具，其包括一公模、一母模與一入 2該公模具有-第-成型曲面，該人子具有—第二成型 曲面’該人子設置於該母模上，該模具進— 驅動器，該至少-㈣器設置於該母模與人子之間，該至 ㈣㈣=為-壓電元件。該母模與公模合模後，提供該 向上一電壓，該驅動器於該方向上或者垂直於 伸長或者收縮，使得該入子相對於該母模移動， :調整該第二成型曲面與該第—成型曲面幾何二 相對於先前技術，該模呈可 心頦參眭... 了於公杈與母模合模發生偏 何中，ν、、妗Μ甘去人 正风生工間内兩成型曲面之幾 q Τ ^線使其重合，以消降伯、、:F曰& . 均偏〜現象，提高模具之精度， 200922769 從而可提高光學鏡片之製造品質。 【實施方式】 下面將結合圖式對本發明實施例作進一步之詳細說 明。 請參閱圖2，本發明第一實施例提供之一種模具20， 其包括一公模21、一母模22與一入子23。該公模21固定 於一公模座211上，其具有一第一成型曲面212。該母模 22固定於一母模座221上，該入子23設置於該母模22上， 具有一第二成型曲面222。 具體地，該母模22中心具有一收容部224，該入子23 設置於該收容部224内，該入子23外壁四周與該收容部224 内壁四周有間隙225，該入子23可於該收容部224内相對 於母模22移動。 該公模21與母模22合模後，該第一成型曲面212及 其周邊延伸水準部分213與第二成型曲面222及其周邊延 伸水準部分223構成一成型空間（未標示）以成型光學鏡片 28。優選地，該第一成型曲面212及其周邊延伸水準部分 213於該周邊延伸水準部分213所在水準面上之投影長度 Di小於該入子23之寬度D2。 該模具20進一步具有一驅動器24，該驅動器24設置 於該收容部223内壁與該入子23外壁間之間隙225處。優 選地，該驅動器24為方形結構，該驅動器24兩相對之接 觸面24c與24d分別與該收容部223内壁與入子23外壁黏 200922769 優選地，該驅動器24為一壓電元件，其由壓電材料製 成，該壓電材料可為壓電單晶材料，如石英單晶體、 LiNb03、Bi2Ge03、Li2Ge03、U3B04 等；亦可為水溶性 壓電晶體材料，如酒石酸鉀鈉、酒石酸乙烯二銨、酒石酸 二鉀等；還可為塵電陶究材料，如鈦酸鋇壓電陶莞BaTi 03、鍅鈦酸鉛Pb(Zr、Ti)03系壓電陶瓷（簡稱PZT)、鈮酸 鹽系壓電陶瓷與鈮鎂酸鉛壓電陶瓷等。該壓電材料之應變 數與對其所加之電壓呈線性關係，其二者之比值為一定 值，其取決於該壓電材料之壓電係數。 優選地，該驅動器24兩相對之侧面24a與24b上設置 有兩電極片（圖未示），該驅動器24藉由該兩電極片連接到 外部電源裝置上，使該驅動器24於Y方向上獲得一電壓， 則其於垂直於Y方向之X方向上發生長度變化。優選地， 該長度之變化於0〜100微米範圍内。 優選地，該模具20進一步包括一澆道25，該澆道25 設置於該公模21内，一端與該成型空間相通，另一端與外 部注塑管道相接通，融熔之塑膠經由該澆道25注入該模具 20之成型空間中，經冷卻固化成型出該光學鏡片28，該第 一成型曲面212與第二成型曲面222即與光學鏡片之兩非 球面吻合。 請參閱圖3，為該模具20於公模21與母模22合模後 發生偏心之示意圖。該公模21與母模22合模後，該第一 成型曲面212之幾何中心與第二成型曲面222之幾何中心 線發生微小偏差φ。 9 200922769 提供驅動器24Y方向上一電壓，該驅動器24於X方 向上寬度dG發生變化，驅動該入子23相對於母模22移動 一微小位移。 請一併參閱圖4，該驅動器24於X方向上寬度變化至 t，該第一成型曲面212之幾何中心與第二成型曲面222 之幾何中心線60重合。 本發明第一實施例提供之模具20,於母模22中設置一 可移動之入子23，公模21與母模22合模發生偏心時，藉 由控制其二者間之驅動器24之寬度變化來移動該入子23 使得第一成型曲面212與第二成型曲面222之幾何中心線 重合，以消除合模發生之偏心現象，且該驅動器24採用壓 電材料製成，其寬度之變化不僅可藉由外部電源裝置進行 控制而且精度達到微米級，可提高成型之精度。 請參閱圖5，為本發明提供之第二實施例之模具30。 該模具30與該第一實施例提供之模具20之不同點在於， 該模具30具有兩驅動器34，分別設置於相交之兩間隙325 内，可驅動該入子33於X方向與Z方向上移動。 優選地，該母模32内壁四周開設有複數個收容槽 341，該兩驅動器34 —第一端34c與該入子33黏接，一第 二端34d設置於該收容槽341内。 優選地，該模具30進一步包括兩彈簧35，分別與該兩 驅動器34——對應，構成驅動回復單元，該入子33由該 驅動器34驅動，由該彈簧35彈回。 本發明第二實施例提供之模具30，藉由設置兩驅動器 10 200922769 34，來驅動該入子33於兩方向移動，使得第一成型曲面與 第二成型曲面之幾何中心線更好重合，精度更高。 綜上所述，本發明確已符合發明專利之要件，遂依法 提出專利申請。惟，以上所述者僅為本發明之較佳實施方 式，自不能以此限制本案之申請專利範圍。舉凡熟悉本案 技藝之人士援依本發明之精神所作之等效修飾或變化，皆 應涵蓋於以下申請專利範圍内。 【圖式簡單說明】 圖1係先前技術中注塑模具合模偏心造成光學鏡片偏 心之示意圖。 圖2係本發明提供之第一實施例之模具之剖面圖。 圖3係本發明提供之第一實施例之模具合模發生偏心 之不意圖。 圖4係本發明提供之第一實施例之模具於合模後調整 入子達到無偏心之示意圖。 圖5係本發明提供之第二實施例之模具之示意圖。 \ 【主要元件符號說明】 模具 10 ， 20 ， 30 幾何中心線 60 光學鏡片 13，28 母模座 121 ， 221 公模 11，21 公模座 111 ， 211 母模 12 ， 22 ， 32 第一成型曲面 112 ， 212 入子 23，33 第二成型曲面 122 ， 222 洗道 25 延伸水準部分 213 ， 223 彈簧 35 間隙 225 > 325 11 200922769 收容部 224 收容槽 341 投影長度 Di 寬度 D2 ’ d〇 ’ di 偏差 Ψ 模具 24 平行面 24a ， 24b 第一端 34c 接觸面 24c ， 24d 第二端. 34d 12BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold, and more particularly to a mold for molding an optical lens. [Prior Art] Injection molding technology installs an injection mold on a molding machine to control the pressure and temperature in the injection mold, so that molten plastic is injected into the injection mold, and finally cooled and solidified to form a plastic product. Injection molding technology features high molding speed and one-shot molding. For the manufacturing method of the mold, please refer to the paper published by Tseng et al. at the IEEE International Symposium on Intelligent Control (1990) for the production of optical lenses using traditional injection molds. When the precision of the mold processing and the precision of the mold clamping of the molding machine are limited, when the male mold of the mold is closed with the mother mold, the deviation between the two is easy to occur, and the two aspheric surfaces on both sides of the manufactured optical lens are inevitably stored. At a certain degree of eccentricity, that is, the geometric centerlines of the two aspheric surfaces of the optical lens do not coincide, and there is a certain deviation, so that the optical axis of the formed optical lens does not coincide with its geometric center line. A conventional injection mold 10 as shown in FIG. 1 includes a male mold 11 and a female mold 12, which are respectively disposed on a male mold base 111 and a female mold base 121. The male mold 11 and the female mold 12 respectively have a first forming curved surface 112 and a second forming curved surface 122. When the male mold 11 is clamped with the female mold 12, a molding space (not shown) is formed for molding the optical lens 13. The first surface 6 200922769 1 curved surface 112 and the first curved curved surface 122 are respectively used for molding the optical lens. Two aspherical surfaces on either side of the lens 13. The master mold 11 and the male mold 12 of the mold 10 shown in Fig. 1 are in a mold clamping state, and the deviation between the geometrical center line of the first forming curved surface 112 and the second forming curved surface 122 is generated - the amount of deviation ^ H' is formed. The amount of deviation r is also generated between the geometric centers of the two aspheric surfaces on both sides of the optical lens. Therefore, the optical lens manufactured by the mold 10 is a defective lens. It can be seen that the conventional injection mold has low precision and is not suitable for manufacturing high-grade lenses with extremely high eccentricity. SUMMARY OF THE INVENTION It is necessary to provide a high-precision mold capable of eliminating the eccentricity problem generated during the molding process of an optical lens. The present invention provides a mold comprising a male mold, a female mold and a second male mold having a -first forming curved surface, the human body having a second forming curved surface, wherein the human being is disposed on the female mold The mold is driven by a driver, and the at least - (four) device is disposed between the master and the person, and the (four) (four) = is - piezoelectric element. After the master mold is clamped with the male mold, the upward voltage is provided, and the driver is elongated or contracted in the direction or perpendicular to the movement, so that the input member moves relative to the female mold: adjusting the second molding curved surface and the first - Molding surface geometry II Compared with the prior art, the model is pleasing to the heart... In the case of the Gonggong and the mother mold clamping, ν, 妗Μ甘去人正风生工间A few q Τ ^ lines of the curved surface make them coincide, so as to reduce the accuracy of the mold, and improve the precision of the mold, 200922769, thereby improving the manufacturing quality of the optical lens. [Embodiment] Hereinafter, embodiments of the present invention will be further described in detail with reference to the drawings. Referring to FIG. 2, a mold 20 according to a first embodiment of the present invention includes a male mold 21, a female mold 22 and an inlet 23. The male mold 21 is fixed to a male mold base 211 having a first curved curved surface 212. The master mold 22 is fixed to a female mold base 221, and the insert 23 is disposed on the female mold 22 and has a second forming curved surface 222. Specifically, the center of the female mold 22 has a receiving portion 224. The insert 23 is disposed in the receiving portion 224. The outer wall of the insert 23 has a gap 225 around the inner wall of the receiving portion 224. The inside of the housing portion 224 moves relative to the female mold 22. After the male mold 21 is clamped with the female mold 22, the first forming curved surface 212 and its peripheral extending level portion 213 and the second forming curved surface 222 and its peripheral extending level portion 223 form a molding space (not labeled) to form the optical lens. 28. Preferably, the projection length Di of the first molding curved surface 212 and its peripheral extension level portion 213 on the level surface of the peripheral extension level portion 213 is smaller than the width D2 of the inlet 23 . The mold 20 further has a driver 24 disposed at a gap 225 between the inner wall of the receiving portion 223 and the outer wall of the inlet 23. Preferably, the driver 24 has a square structure, and the opposite contact faces 24c and 24d of the driver 24 respectively adhere to the inner wall of the receiving portion 223 and the outer wall of the insert 23. 200922769 Preferably, the driver 24 is a piezoelectric element, which is pressed by The piezoelectric material may be a piezoelectric single crystal material, such as a quartz single crystal, LiNb03, Bi2Ge03, Li2Ge03, U3B04, etc.; or a water-soluble piezoelectric crystal material, such as sodium potassium tartrate, diammonium ethylene tartrate, Dipotassium tartrate, etc.; can also be dust electric ceramic materials, such as barium titanate piezoelectric pottery BaTi 03, lead titanate lead Pb (Zr, Ti) 03 series piezoelectric ceramics (referred to as PZT), citrate pressure Electric ceramics and lead magnesium titanate piezoelectric ceramics. The piezoelectric material has a linear relationship with the applied voltage, and the ratio of the two is a certain value depending on the piezoelectric coefficient of the piezoelectric material. Preferably, the opposite sides 24a and 24b of the driver 24 are provided with two electrode sheets (not shown). The driver 24 is connected to the external power supply device by the two electrode sheets, so that the driver 24 is obtained in the Y direction. A voltage changes in length in the X direction perpendicular to the Y direction. Preferably, the length varies from 0 to 100 microns. Preferably, the mold 20 further includes a runner 25 disposed in the male mold 21, one end of which is in communication with the molding space, and the other end is connected to an external injection pipe through which the molten plastic passes. 25 is injected into the molding space of the mold 20, and the optical lens 28 is formed by cooling and solidification. The first molding curved surface 212 and the second molding curved surface 222 are matched with the two aspheric surfaces of the optical lens. Please refer to FIG. 3, which is a schematic diagram of the eccentricity of the mold 20 after the male mold 21 and the female mold 22 are clamped. After the male mold 21 is clamped with the female mold 22, the geometric center of the first forming curved surface 212 and the geometric center line of the second forming curved surface 222 are slightly offset by φ. 9 200922769 provides a voltage in the direction of the driver 24Y, the driver 24 changes in the width dG in the X direction, and drives the input member 23 to move a small displacement relative to the master mold 22. Referring to FIG. 4 together, the driver 24 has a width variation to t in the X direction, and the geometric center of the first molding curved surface 212 coincides with the geometric center line 60 of the second molding curved surface 222. In the mold 20 provided by the first embodiment of the present invention, a movable insert 23 is disposed in the female mold 22, and the width of the driver 24 between the male mold 21 and the female mold 22 is controlled by eccentricity. The change to move the ejector 23 causes the first forming curved surface 212 to coincide with the geometric center line of the second forming curved surface 222 to eliminate the eccentricity of the clamping, and the driver 24 is made of a piezoelectric material, and the width is changed not only It can be controlled by an external power supply unit and the accuracy is up to the micron level, which improves the precision of molding. Please refer to FIG. 5, which is a mold 30 according to a second embodiment of the present invention. The mold 30 is different from the mold 20 provided in the first embodiment in that the mold 30 has two actuators 34 respectively disposed in the intersecting gaps 325 for driving the inlets 33 to move in the X and Z directions. . Preferably, a plurality of receiving slots 341 are defined in the inner wall of the female die 32. The first end 34c of the two drivers 34 is bonded to the insert 33, and a second end 34d is disposed in the receiving slot 341. Preferably, the mold 30 further includes two springs 35 corresponding to the two drivers 34, respectively, to constitute a drive recovery unit, and the inlet 33 is driven by the driver 34 and springs back by the spring 35. The mold 30 provided by the second embodiment of the present invention drives the insert 33 to move in two directions by providing two drivers 10 200922769 34, so that the geometric center line of the first forming curved surface and the second forming curved surface are better coincident with each other. higher. In summary, the present invention has indeed met the requirements of the invention patent, and has filed a patent application according to law. However, the above description is only a preferred embodiment of the present invention, and it is not possible to limit the scope of the patent application of the present invention. Equivalent modifications or variations made by persons skilled in the art in light of the present invention are intended to be included within the scope of the following claims. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the eccentricity of an optical lens caused by mold clamping eccentricity in the prior art. Figure 2 is a cross-sectional view showing a mold of a first embodiment provided by the present invention. Fig. 3 is a view showing the eccentricity of the mold clamping of the first embodiment provided by the present invention. Fig. 4 is a schematic view showing the mold of the first embodiment provided by the present invention after the mold is clamped to achieve no eccentricity. Figure 5 is a schematic illustration of a mold of a second embodiment provided by the present invention. \ [Major component symbol description] Mold 10, 20, 30 Geometric center line 60 Optical lens 13, 28 Female mold seat 121, 221 Male mold 11, 21 Male mold base 111, 211 Female mold 12, 22, 32 First curved surface 112, 212 insert 23,33 second forming curved surface 122, 222 washway 25 extension level portion 213, 223 spring 35 gap 225 > 325 11 200922769 housing portion 224 receiving groove 341 projection length Di width D2 'd〇' di deviation模具 Mold 24 parallel faces 24a, 24b First end 34c Contact faces 24c, 24d Second end. 34d 12