200843932 九、發明說明： 【發明所屬之技術領域】 本發明是有關於一種射出成型鏡片，特別是指一種可 消除縫合線的射出成型鏡片之製造方法及其模具。 【先前技術】 如圖1、2所示，習知一種大型塑膠凹透鏡片j，其鏡 片中心（最薄）與鏡片邊緣（最厚）的厚薄比差異甚大兄 該凹透鏡片1成型後通常會形成一影響鏡片面精度的縫合 線缺陷101。如圖卜3所示，該縫合線缺陷ι〇ι的形成原 因乃在於，當一塑料2經一模具組3的一進澆口 3〇1，射入 該模具組3的一鏡片模穴3〇2時，該塑料2的一流動波前 201的行進速度不同所致。 舉例來說，由圖3中可知，該鏡片模穴3〇2在該流動 波前201的一直向路徑j上的厚度是由邊緣最寬變化至中 心最窄，因此，該流動波前201在該直向路徑j上的行進 j度將會由快變慢；相反地，該鏡片模穴3〇2在該流動波 前201的二側向路徑n上的厚度則是始終保持著近乎一樣 的大小，因此，該流動波前2〇1在該等側向路徑π上的行 進速度將會始終維持著近乎一樣的速度。 如此，參閱圖3可知，當該流動波前2〇1行進至鏡片 中心位置時，由於該流動波前2〇1在該等侧向路徑丘上的 行進速度，將會明顯快於該流動波前2〇1在該直向路徑工 上的行進速度，因此，該流動波前2〇1在該等側向路徑Η 上的部分，將會大幅超前其在該直向路徑〗上的部分一段 5 200843932 波前超前距離Λχ，導致該流動波前201在該等側向路㈣ 上的部分最終會相碰而產生一縫合線观，也就是該凹透鏡 片1成型後的縫合線缺陷101。 為了改善上述的縫合線問題，雖然有人嘗試在該鏡片 模穴302的進洗σ 3()1對侧，增加排氣或抽真空，秋而， 由於此種方式只會同時加快該流動波前2〇1在該等直向、 彳向路U π上的仃進速度，並無法消去該流動波前2⑴ 在該等直向、側向路徑工、π上的行進速度差，因此，改 善效果相當有限。另外，亦有人試圖藉由該塑料2射出後 =了程來消除該縫合線2〇2，但是，此種方式只能讓 =5線2〇2變短，並無法完全消除該縫合線繼。 【發明内容】 因此，本發明之一目 室μ Μ# 、 P在提供一種可消除具大厚 鏡片之製造方法。線的可消除縫合線的射出成型 本發明之另一目的，即一 的射出成型鏡片的縫合線 八―種可消除具大厚薄比 之模具。 、、’、可為除縫合線的射出成型鏡片 本發明可消除縫合狳 含：⑷將-塑料從H出成型鏡片之製造方法，包 穴内。⑴在該成型模穴：：沿7進:堯方向射入-成型模 時對該成型模穴抽氣。、稱於该進澆方向的二相反側同 本發明可消除縫合線 可動構件、一可動模介 、出成型鏡片之模具，包含一 固定構件，及一固定模仁。該 200843932 可動構件’、冑帛一分模面。該可動模仁是設置於該可動 構件内丄並具有一第一成型面。該固定構件具有-朝向該 弟一分換面的第二分模面。該固定模仁是設置於該固定構 =内具有一朝向該第一成型面的第二成型面，當該第 一、二分模面互相抵接時，該第—成型面、該第一分模面 與該第二成型面、該第二分模面之間可定義出一成型模穴 及成3L杈八具有一界定於該第一、二成型面之間的鏡片 成型空間、一與該鏡片成型空間連通的進澆口，及二界定 於该第一、二分模面之間且分別與該鏡片成型空間連通的 低壓儲料空間，該等低慶儲料空間是設置於該鏡片成型空 間對稱於—進澆方向的二相反侧上。 【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σ參考圖式之一較佳實施例的詳細說明中，將可清 楚的明白。 止參閱圖4，為本發明可消除縫合線的射出成型鏡片之製 仏方法的k佳實施例。如圖5、6所示，該較佳實施例所採 用的組成型模具包含：一可動構件1〇、一可動模仁如、 一固定構件30，及一固定模仁4〇。 該可動構件10具有一第一分模面n。 忒可動楔仁20是設置於該可動構件1〇内，並具有一 第一成型面21。 〃 該固定構件3〇具有一朝向該第一分模面u的第二分模 面31。 200843932 朝向仁4G是設置於該固定構件30内，並具有— 面11、31型面21的第二成型面41。當該第一、二分模 互相抵接時，該第一成型 與該第二成型面41、該第1模面λι °玄第刀拉面” 楛〜π χ弟一刀杈面31之間可定義出一成型 拉八5〇,該成型模穴50具有一界定 一= 21、41之間的鏡片成型空間51、一 /片成型面 遠ϋ的、％ 興遍鏡片成型空間51 連通的進洗口 52、二界定 一 且:別與該鏡片成型空間51連通的低;; I:::亥第一分模面U上且分别與該等低跡料空間53連 空…稱於―53是設置 儲料空間5”由 的二相反側上，且，每-㈣ 531及- 設於該第一分模面11上的第-凹部 。^又於该第二分模面31上的第二凹部532所構成 該等低壓儲料空間53是 成型空間51連通… 方向¥與該鏡片 八別“ 氣方向γ與該進澆方向X之間是 置角e是為8〇。。 在本實她例中，該設 ::抽氣道54是分別與該等低壓儲料空間”連通。 貝靶例中’該等抽氣道54可與— 如抽氣機）連通。 W (圖未不，例 ,參閱圖4、5、6’本發明可消除縫合線的 之製造方法的較佳實施例，包含以下步驟： 兄 步驟―：將—塑料刚從該進洗口 52沿該進洗方向χ 200843932 射入該成型模穴50的鏡片成型空間51内。 步驟二··在該成型模穴50對稱於該進澆方向x的二相 反側’同時對該成型模穴50的低壓儲料空間53抽氣。在 本貫；^例中’是藉由該抽氣源（圖未示）經該等抽氣道54 同時對該等低壓儲料空間53抽氣。 藉此，如圖6所示，雖然當該塑料1〇〇的一流動波前 11〇在剛射入該鏡片成型空間51内時，該流動波前n〇在 直向路徑I上與二側向路徑Π上的行進速度亦會有快慢 差異，但是，當該流動波前110行進至鏡片中心位置時，由 於忒流動波前110在該等側向路徑π上的部分塑料會被吸入 孩等低壓儲料空間53内，因此，該流動波前11〇在該等側 向路彼Π上的行進速度會被減慢，如此，該流動波前11 〇在 该直向路徑1上的行進速度，即可追上該流動波前110在該 等側向路徑π上的行進速度，換句話說，當該流動波前工i 〇 仃進過鏡片中心位置後，該流動波前11〇在該直向路徑丨上 與該等側向路徑Π上的行進速度將會趨向一致，而不再形 成明顯雙波峰的波形，如此，該流動波前110在流動平衡的 障形下’即不會產生雙波峰相碰形成的縫合線。 此後，如圖5、6所示，該塑料1〇〇最終可在該成型模 八50内成型為一成型物2〇〇，該成型物2〇〇具有一形成於 、鏡片成型空間51内的片體210、一形成於該進澆口 52内 的九口部22〇，及二分別形成於該等低壓儲料空間Η内的 儲料。卩230。如圖7、8所示，將該成型物2〇〇的澆口部 22〇與儲料部230去除，即可得到該片體21〇，該片體 9 200843932 具有一頂面211、一相反於該頂面211的底面2i2，及一連 接於該頂、底面211、212之間的周面213，且，該片體21〇 的厚度在鄰近一鏡片中心的位置是為最薄，該片體21〇的 厚度在鄰近該周面213的位置是為最厚，該周面213具有 貝貝上垂直於έ亥進洗方向X的第一切口部214，及二對稱 於該進澆方向X且實質上分別垂直於該等抽氣方向γ的第 二切口部215。 經由以上的說明，可再將本發明的優點歸納如下： 本發明是在該成型模穴50對稱於該進澆方向χ的二相 反側，同時對該成型模穴50的低壓儲料空間53抽氣，因 此，該塑料100的流動波前11〇在該等直向、侧向路徑t、 Π上的行進速度最終將會趨向一致，而不會產生習知過大 的波前超前距離，如此，該塑料1〇〇在該成型模穴5〇的鏡 片成型空間51内，即可成型出無縫合線缺陷的片體21〇, 使该片體210具有良好的面精度與光學解析度。 歸納上述，本發明之可消除縫合線的射出成型鏡片之 製造方法及其模具，不僅在製造過程中能防止鏡片產生縫 合線缺陷，更能製造出具大厚薄比的射出成型鏡片，並使 鏡片具有良好的面精度與光學特性，故確實能達到發 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 範圍及發明說明内容所作之簡單的等效變化與修飾，皆仍 屬本發明專利涵蓋之範圍内。 10 200843932 【圖式簡單說明1 圖 1是習4rr ^ « 種，、縫合線缺陷的大厚薄比凹透鏡H 俯視示意圖； & β的 圖2疋圖1中2-2割面線的剖視示意圖； 塑 圖3是習知塑料射入一模具組的—鏡片模穴 料的一流動波前的行進示意圖； 成 圖4是本發明之可消除縫合線的射出成型鏡片 方法一較佳實施例的流程示意圖； 绝 圖5是該較佳實施例所採用的—模具與一成型 合剖視示意圖； 圖6是該模具的一可動構件與一塑料的俯視示意圖， 說明該塑料的一流動波前在不同波前路徑上的行進狀況； 圖7是該較佳實施例所成型出的一片體的俯視示意圖 ;及 圖8是圖7中8-8割面線的剖視示意圖。 11 200843932 【主要元件符號說明】 100 * * * * *塑料 531 •… •第一凹部 110 ……流動波前 532.·… *第二凹部 200 ……成型物 54*…… ♦抽氣道 210 ……片體 X··…… ，進澆方向 211· ……頂面 γ* .… •抽氣方向 212^ …4…底面 Θ， •設置角 213 ……周面 I….… *直向路径 214 ……第一^刀口部 Π…… •側向路径 215 ^ ……第二切口部 220 ……洗口部 230 ……儲料部 10 ……可動構件 11 …♦苐一分模面 20 - ……可動模仁 21 ……第一成型面 30 - ……固定構件 31 - ……第二分模面 40 - ……固定模仁 41 - ……第二成型面 50 ……成型模穴 51 ……鏡片成型空間 52 - ……進洗口 53 - …·低壓儲料空間 12200843932 IX. Description of the Invention: [Technical Field] The present invention relates to an injection molded lens, and more particularly to a method for manufacturing an injection molded lens capable of eliminating a suture and a mold thereof. [Prior Art] As shown in Fig. 1 and 2, a large plastic concave lens sheet j is known, and the thickness ratio between the center of the lens (the thinnest) and the edge of the lens (the thickest) is very large. The concave lens sheet 1 is usually formed after molding. A suture defect 101 that affects the accuracy of the lens surface. As shown in FIG. 3, the suture defect ι〇ι is formed because a plastic 2 is injected into a lens cavity 3 of the mold set 3 through a gate 3〇1 of a mold set 3. At 〇2, the traveling speed of a flowing wavefront 201 of the plastic 2 is different. For example, as can be seen from FIG. 3, the thickness of the lens cavity 3〇2 on the straight path j of the flow wavefront 201 is changed from the widest edge to the narrowest at the center, and therefore, the flow wavefront 201 is The travel j degree on the straight path j will be slowed down faster; conversely, the thickness of the lens cavity 3〇2 on the two lateral paths n of the flow wavefront 201 is always nearly the same. The size, therefore, the travel speed of the flow wavefront 2〇1 on the lateral paths π will always maintain nearly the same speed. Thus, referring to FIG. 3, when the flow wavefront 2〇1 travels to the center position of the lens, the traveling speed of the flow wavefront 2〇1 on the lateral path hills will be significantly faster than the flow wave. The travel speed of the first 2〇1 on the straight path work, therefore, the portion of the flow wavefront 2〇1 on the lateral path 将会 will greatly advance its section on the straight path 〗 5 200843932 The wavefront advance distance Λχ causes the portion of the flow wavefront 201 on the lateral paths (4) to eventually collide to produce a suture view, that is, the suture defect 101 after the concave lens sheet 1 is formed. In order to improve the above suture problem, although some people try to increase the exhaust or evacuation on the opposite side of the lens cleaning hole σ 3 () 1 of the lens cavity 302, in the autumn, since this method only accelerates the flow wavefront at the same time. The entanglement speed of 2〇1 on these straight and 彳 directions U π cannot eliminate the difference of the traveling speed of the flow wavefront 2(1) in the straight direction, the lateral path work, and π, therefore, the improvement effect Quite limited. In addition, some people have tried to eliminate the suture 2〇2 by the injection of the plastic 2, but this way only makes the =5 line 2〇2 shorter, and the suture cannot be completely eliminated. SUMMARY OF THE INVENTION Therefore, one of the objects of the present invention, μ Μ #, P, provides a manufacturing method capable of eliminating a lens having a large thickness. Injection molding of the wire which can eliminate the suture. Another object of the present invention is that a suture of an injection molded lens can eliminate a mold having a large thickness ratio. The invention can eliminate the stitching of the suture. The invention can eliminate the stitching. The method comprises the following steps: (4) manufacturing method of forming a plastic from H to form a lens, and enclosing the lens. (1) At the molding cavity:: the molding cavity is evacuated while entering the molding die along the direction of 7: 尧. The two opposite sides of the pouring direction are the same as the present invention, which can eliminate the suture movable member, a movable mold, and a mold for forming the lens, and include a fixing member and a fixed mold. The 200843932 movable member ', a part of the mold surface. The movable mold core is disposed in the movable member and has a first molding surface. The fixing member has a second parting face facing the face of the younger one. The fixed mold core is disposed in the fixed structure and has a second molding surface facing the first molding surface. When the first and second mold surface meet each other, the first molding surface and the first partial mold Between the surface and the second molding surface, the second mold surface can define a molding cavity and a lens forming space defined between the first and second molding surfaces, and the lens a gate connected to the molding space, and a low-pressure storage space defined between the first and second mold faces and respectively communicating with the lens molding space, the low-clear storage space is symmetrically disposed in the lens molding space On the opposite side of the two-injection direction. [Embodiment] The above and other technical contents, features and effects of the present invention will become apparent from the following detailed description of the preferred embodiments. Referring to Figure 4, there is shown a preferred embodiment of the method of making an injection molded lens that eliminates sutures. As shown in Figures 5 and 6, the constitutive mold used in the preferred embodiment comprises: a movable member 1 〇, a movable mold member such as a fixing member 30, and a fixed mold core 4〇. The movable member 10 has a first parting surface n. The movable wedge member 20 is disposed in the movable member 1b and has a first molding surface 21. The fixing member 3 has a second parting surface 31 facing the first parting surface u. 200843932 The facing core 4G is a second molding surface 41 provided in the fixing member 30 and having the surface 11 and the 31 surface 21. When the first and second molds abut each other, the first molding and the second molding surface 41, the first mold surface λι ° 第 第 拉 ” π π π π 一 一 一 一 31 31 31 31 可 可The molding cavity 50 has a lens molding space 51 defining a = 21, 41, a sheet molding surface, and a rinsing opening 52 of the lens forming space 51. And two define one and: not connected to the lens molding space 51;; I::: first on the first parting surface U and respectively connected to the low-travel space 53 ... said in the "53 is set storage The material space 5" is on the opposite side of the two, and each - (four) 531 and - the first concave portion provided on the first partial mold surface 11. ^ The second recess 532 on the second parting surface 31 constitutes the low-pressure storage space 53 which is the molding space 51. The direction ¥ and the lens are different between the gas direction γ and the pouring direction X. The angle e is 8 〇. In this example, the arrangement: the air extraction passage 54 is in communication with the low pressure storage spaces, respectively. In the shell example, the air suction passages 54 may be in communication with, for example, an air extractor. W (FIG. 4, 5, 6) A preferred embodiment of the method for manufacturing a suture eliminating the present invention includes the following steps: Brother step -: - Plastic just from the wash port 52 Along the direction of the washing direction χ 200843932, it is injected into the lens molding space 51 of the molding cavity 50. Step 2: The molding cavity 50 is symmetric with respect to the opposite side of the pouring direction x while simultaneously forming the molding cavity 50 The low-pressure storage space 53 is evacuated. In the present example, the low-pressure storage space 53 is simultaneously evacuated through the suction passages 54 by the pumping source (not shown). As shown in FIG. 6, although a flow wavefront 11 of the plastic 1 〇 is just injected into the lens molding space 51, the flow wavefront n 〇 is on the straight path I and the two lateral paths Π There is also a difference in speed between the travel speeds, but when the flow wavefront 110 travels to the center of the lens, some of the plastic on the lateral path π will be drawn into the low pressure storage material due to the 忒 flow wavefront 110. Within the space 53, therefore, the traveling speed of the flowing wavefront 11〇 on the lateral paths will be slowed down. Thus, the traveling speed of the flowing wavefront 11 该 on the straight path 1 can catch up with the traveling speed of the flowing wavefront 110 on the lateral paths π, in other words, when the flowing wavefront After the worker i has entered the center position of the lens, the traveling wavefront 11〇 will tend to coincide with the traveling speed on the lateral path 与 and the lateral path Π, and no obvious double-peak waveform will be formed. In this way, the flow wavefront 110 is under the flow-balanced barrier shape, that is, the suture formed by the double-peak collision does not occur. Thereafter, as shown in FIGS. 5 and 6, the plastic 1〇〇 can finally be in the molding die. Formed into a molded product 2〇〇, the molded product 2〇〇 has a sheet body 210 formed in the lens molding space 51, a nine-port portion 22〇 formed in the inlet gate 52, and two The storage materials respectively formed in the low-pressure storage space 卩 230. As shown in FIGS. 7 and 8 , the gate portion 22 〇 of the molded product 2 〇 and the storage portion 230 are removed, thereby obtaining the The sheet body 21〇, the sheet body 9 200843932 has a top surface 211, a bottom surface 2i2 opposite to the top surface 211, and a connection The peripheral surface 213 is connected between the top and bottom surfaces 211 and 212, and the thickness of the sheet 21〇 is the thinnest at a position adjacent to the center of a lens, and the thickness of the sheet 21〇 is adjacent to the circumferential surface 213. The position is the thickest, and the circumferential surface 213 has a first notch portion 214 on the babe perpendicular to the washing direction X of the έ, and the second symmetry is in the pouring direction X and substantially perpendicular to the pumping direction. The second notch portion 215 of γ. Through the above description, the advantages of the present invention can be further summarized as follows: The present invention is that the molding cavity 50 is symmetric with respect to the opposite side of the pouring direction, while the molding cavity is formed. The low pressure storage space 53 of 50 is evacuated, so that the traveling speed of the flowing wavefront 11 of the plastic 100 on the straight, lateral paths t and Π will eventually tend to be uniform without excessively large conventional The wavefront advance distance, so that the plastic sheet 1 is formed in the lens molding space 51 of the molding cavity 5, and the sheet body 21〇 of the seamless wire defect can be formed, so that the sheet body 210 has a good surface. Precision and optical resolution. In summary, the manufacturing method and the mold for the injection-molded lens of the present invention capable of eliminating the suture can prevent the lens from being caused by the suture defect during the manufacturing process, and can also produce the injection-molded lens with a large thickness ratio and the lens. Good surface accuracy and optical properties, so it can really achieve the purpose. The above is only the preferred embodiment of the present invention, and the scope of the invention is not limited thereto, that is, the simple equivalent changes and modifications made by the scope of the invention and the description of the invention are All remain within the scope of the invention patent. 10 200843932 [Simple diagram of the diagram 1 Figure 1 is a schematic view of the large thickness-to-concave lens H of the suture defect, and a cross-sectional view of the 2-2 section line in Fig. 2 and Fig. 1 of Fig. 1 3 is a schematic diagram of a flow wavefront of a lens mold material injected into a mold set by a conventional plastic; FIG. 4 is a preferred embodiment of the method for removing an injection molded lens of the present invention. Figure 5 is a schematic cross-sectional view of a mold and a molding taken in the preferred embodiment; Figure 6 is a top plan view of a movable member and a plastic of the mold, illustrating a flow wave front of the plastic Figure 7 is a top plan view of a piece of the body formed by the preferred embodiment; and Figure 8 is a cross-sectional view of the line 8-8 of Figure 7; 11 200843932 [Description of main component symbols] 100 * * * * * Plastic 531 •... • First recess 110 ... Flow wavefront 532.... * Second recess 200 ... Mold 54*... ♦ Air extraction channel 210 ... ...slice X··......, injecting direction 211·...top surface γ* .... • pumping direction 212^...4...bottom Θ, •set angle 213...circumferential I....... *straight path 214 ... first ^ knife mouth Π ... • lateral path 215 ^ ... second cutout portion 220 ... mouthwash portion 230 ... stocking portion 10 ... movable member 11 ... ♦ a parting surface 20 - ... movable mold 21 ... first molding surface 30 - ... fixing member 31 - ... second mold surface 40 - ... fixed mold core 41 - ... second molding surface 50 ... molding cavity 51 ... ...lens molding space 52 - ... into the wash port 53 - ... low pressure storage space 12