1287672 九、發明說明： 【發明所屬之技術領域】 本發明疋有關於一種擴散板模具的設計，特別是指一 種擴散板射出成形技術之模具的料口裝置。 【先前技術】 背光模組（Back light module)是由光源（Light s〇urce )、導光板（Light guide plate)、反射板（Reflect〇r)、擴散 板（Diffuser)、增亮膜（BEF菱鏡片）、偏光轉換膜（p_s Converter)等元件組構而成，用以提供平面顯示器充足且 均勻的光源的關鍵組件之一。 隨著市場對平面顯示器尺寸的增加要求，背光模組的 尺寸也需不斷地對應增加，當然，上述組構背光模組的元 件也必須對應地往大尺寸方向發展；而此等巨觀結構簡單 的擴散板、導光板等元件往大尺寸方向發展製作時，並不 是簡單地例如從15吋直接放大至19吋、26吋，而是一連 串複雜的開發設計、成形方法與製程搭配的過程。 以擴散板為例而言，目前擴散板多半是以押出成形後 ’再加以裁切成形製作，整體而言加工流程繁多，不但生 產成本較高，同時料材損耗也較多。 射出成形技術是另一可用於生產擴散板的技術；但是 由於擴散板的厚度僅約2mm左右，但是長寬尺寸卻隨著目 如平面顯示器主流尺寸的2〇吋至47吋，甚至需高達60吋 以上’因此’參閱圖1，以目前射出成形技術侧面中央進料 口裝置1 (即單一進料口 1〇〇設置於對應成形出擴散板之射 5 1287672 出成形模具的模穴的側面中央）產製大尺寸擴散板時，會 因為所需產製之成品（擴散板）的長寬比例過大，而有最 4動距離11超過液您擴散板原料可流動距離，及液能擴 • 散板原料流動不平均’而造成充填不完全、結合線21日:顯 的問題，無法產製完整的擴散板。 參閱圖2，另一射出成形技術侧面全面進料口裝置2 ( 類似於側面中央進料口裝置1，以單-進料口⑽設置於對 貞成形出擴散板之射出成形模具的模穴的側面中央，但更 增設流道㈣液態擴散板原料，以填注滿模穴）產製 #散板時，則會因為所需產製之成品（擴散板）從中央到 左右兩端的距離很長（超過3G(hnm以上），且液態擴散板原 料隨，溫度的降低與射出壓力的損耗，而產生在相對進料 口最遠之二對角處產生結合線21明顯的問題；而若為了增 • 加液怨擴散板原料的流動距離，因而增厚流道200厚度時 ，雖然液態擴散板原料可流動至兩端，但如此一來，又會 • ^成射出壓力不平均，以及流道厚度增加而形成很硬的長 棒’相對擴散板的2mm的厚度而產生的拉力，產生使產製 的擴散板翹曲變形的問題，而無法產製壓力平均、平坦， 輝度均齊度佳的擴散板。 此外，無淪是以圖丨之側面中央進料口裝置丨，亦或是 以如圖2之側面全面進料口裝置2產製擴散板時，都會由 於需產製之成品的長寬尺寸與厚度尺寸的差異懸殊，使得 液態擴散板原料經由進料口 1〇〇射注入模穴後，所需填注 滿杈八％往長寬厚等各方向的流動距離差異過大，而使得 6 1287672 固化時内應力增加，而產生成品翹曲的問題。 因此，如何改善射出成形產製大尺寸（26吋以上平面 顯示器所適用）擴散板時所產生的問題，是業者不斷研究 的方向之一。 【發明内容】 因此，本發明之目的，即在一種提供用於製備背光模 組之擴散板的射出成形側面料口裝置，以射出成形產製大 > 尺寸之背光模組的擴散板。 於是，本發明一種用於製備背光模組之擴散板的射出 成形侧面料口裝置，是與對應成形該擴散板之射出成型模 具的模八相連通’液態擴散板原料經該側面料口設計注 入該模穴中進而成形出該擴散板。 本發明的特徵在於該側面料口設計包含複數與該模穴 相通之進料口，分別成扇形且依序設置於該模穴之一對應 成形出該擴散板侧邊的模面上。 | 【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 以下配合參考圖式之三個較佳實施例的詳細說明中，將可 清楚的呈現。 在本發明被詳細描述之前，要注意的是，在以下的說 明内容中，類似的元件是以相同的編號來表示。 參閱圖3,本發明用於製備背光模組之擴散板的射出成 形側面料口裝置3的一第一較佳實施例，適用於以射出成 形技術產製背光模組的擴散板，特別是22吋到26吋的大 7 1287672 尺寸擴散板。 、U射出成形側面料口裝置3與對應成形出擴散板之射出 成里模’、的模a相連通’液態擴散板原料可經由射出成形 側面料口裝詈1、、++ >主滿模穴，並對應模穴形狀進而固化成形 出擴散板。 射出成形側面料口裝置3設計包含二扇形進料口 31， 依序"又置於模穴對應成形出擴散板側邊的模面上並與模穴 相通’較佳的設計是此二扇形進料口 31設置於對應成形出 擴散板較長邊的模面上，且彼此依序緊密連結，當然，此 二扇形進料π 31亦可以視實際需要，設置於對應成形出擴 散板較短邊的模面上，或是彼此相間隔地設置於對應成形 出擴散板較長（或短）邊的模面上。 當以此射出成形側面料口裝置3的兩扇形進料口 31射 庄入液I、的擴放板原料時，液態擴散板原料被二扇形進料 口 31限制而以二扇形面彼此串聯充填流動，彼此相互抵銷 過快及過慢的液態擴散板原料流動狀態，而均勻填注滿模 穴，進而在最低内應力的狀態下固化成形出擴散板，而製 得輝度均齊度佳、且無翹曲現象的大尺寸擴散板。 參閱圖4,本發明用於製備背光模組之擴散板的射出成 形側面料口裝置3,的一第二較佳實施例，適用於以射出成 形技術產製背光模組的擴散板，特別是3〇吋到37吋的大 尺寸擴散板。 與上例相似，其不同處僅在於合併考量液態擴散板原 料往長與寬方向的流動距離，以及對應擴散板厚度的關係 8 1287672 後，射出成形側面料口裝置3,包含三扇形進料口 31，依序 °又置於模穴對應成形出擴散板較長邊的模面上，位於中間 的扇形進料口 31位於模面的正中央處，另兩扇形進料口 31 對稱地與中間的扇形進料口 31緊密貼靠設置；當然，此三 扇形進料口 31亦可以視實際需要，設置於對應成形出擴散 板較紐邊的模面上，或是彼此相間隔地設置於對應成形出 擴散板f交長（或短）邊的模面上。 當以此射出成形側面料口裝置3,的三扇形進料〇 31射 注入液態的擴散板原料時，液態擴散板原料被三扇形進料 口 31限制而以三扇形面態樣彼此串聯充填流動，彼此相互 抵銷過快及過慢的液態擴散板原料流動狀態，而均勻填注 滿模穴，進而在最低内應力的狀態下固化成形出擴散板， 而製得輝度均齊度佳、且無翹曲現象的大尺寸擴散板。 參閱圖5,本發明用於製備背光模組之擴散板的射出成 形側面料口裝置3，，的一第三較佳實施例，適用於以射出成 形技術產製背光模組的擴散板，特別是4〇吋以上的大尺寸 擴散板（本例僅以實際尺寸介於4〇吋至42吋為例說明）。 與上兩例相似，其不同處僅在於，因4〇吋以上之擴散 板長寬尺寸更大，與厚度的比值差異更多，因此，射出成 形側面料口裝置3”以五扇形進料口 31，依序對稱地設置於 模穴對應成形出擴散板較長邊的模面上，而使得射注入液 態的擴散板原料時，液態擴散板原料被五扇形進料口 31限 制而以五組扇形面彼此串聯充填流動，並彼此相互抵銷過 快及過慢的液態擴散板原料流動狀態，而均勻填注滿模穴 9 1287672 ’進而在最低内應力的狀態下固化成形出擴散板，而製得 輝度均齊度佳、且無翹曲現象的大尺寸擴散板。 由上述說明可知，本發明用於製備背光模組之擴散板 的射出成形側面料口裝置3、3,、3”，是將複數扇形進料口 31設置‘於對應擴散板較長邊的模面上，以複數呈扇形的扇 形進料口 31限制灌注入液態擴散板原料，使液態擴散板原 料以多數組扇形面彼此串聯充填流動，並彼此相互抵銷過 快及過慢的流動狀態，而均勻填注滿模穴，進而在最低内 應力的狀態下固化成形出擴散板，而製得輝度均齊度佳、 且無翹曲現象的大尺寸擴散板；確實可以改善目前以中央 進料口裝置1及側面全面進料口裝置2產製擴散板時，會 因為所需產製之成品（擴散板）的長寬比例過大，而有最 大流動距離11超過液態擴散板原料可流動距離、液態擴散 板原料流動不平均、在相對進料口最遠之二對角處產生明 顯之結合線21，以及内應力過大而成品翹曲的問題，達到 本發明的創作目的。 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。 【圖式簡單說明】 圖1是一設計示意圖，說明目前射出成形技術側面中 央進料口設計； 圖2是一設計示意圖，說明目前射出成形技術側面全 10 1287672 面進料口設計； 圖3是一設計示意圖，說明本發明用於製備背光模組 之擴散板的射出成形側面料口裝置的一第一較佳實施例； 圖4是一設計示意圖，說明本發明用於製備背光模組 之擴散板的射出成形側面料口裝置的一第二較佳實施例； 及 圖5是一設計示意圖，說明本發明用於製備背光模組 之擴散板的射出成形側面料口裝置的一第三較佳實施例。 1287672 【主要元件符號說明】 100 進料口 21 結合線 200 流道 3 射出成形側面料口裝置 1 侧面中央進料口裝置 3， 射出成形側面料口裝置 11 流動距離 3” 射出成形側面料口裝置 2 側面全面進料口裝置 31 扇形進料口1287672 IX. Description of the Invention: [Technical Field of the Invention] The present invention relates to a design of a diffusion plate mold, and more particularly to a nozzle device for a mold for a diffusion plate injection molding technique. [Prior Art] The backlight module is a light source (Light s〇urce), a light guide plate, a reflector (Reflect〇r), a diffusion plate (Diffuser), and a brightness enhancement film (BEF Ling). One of the key components of a light source that provides a sufficient and uniform flat panel display, such as a lens) and a polarizing converter (p_s converter). As the size of the flat panel display increases, the size of the backlight module also needs to be increased correspondingly. Of course, the components of the above-mentioned fabric backlight module must also be correspondingly developed in a large size direction; and such a giant structure is simple. When the components such as the diffusion plate and the light guide plate are developed in a large size direction, they are not simply enlarged from 15 至 to 19 吋, 26 吋, but a series of complicated development and design, forming methods and process matching processes. For example, in the case of a diffusion plate, at present, most of the diffusion plates are formed by extrusion molding, and the whole process is complicated, and the production cost is high, and the material loss is also large. Injection molding technology is another technology that can be used to produce diffusing plates; however, since the thickness of the diffusing plate is only about 2mm, the length and width dimensions are as high as 60% from the mainstream size of flat-panel displays.吋The above 'so' refers to Figure 1, with the current injection molding technology side central feed port device 1 (ie, a single feed port 1 〇〇 is placed in the center of the side of the cavity corresponding to the forming of the diffuser plate 5 1287672 out of the forming die When producing a large-size diffuser, the length-to-width ratio of the finished product (diffusion plate) to be produced is too large, and the maximum moving distance 11 exceeds the flowable distance of the liquid material of the diffusing plate, and the liquid energy expands and disperses. The flow of the plate material is not uniform', resulting in incomplete filling, and the bonding line is 21 days: the problem is obvious, and it is impossible to produce a complete diffusion plate. Referring to Figure 2, another injection molding technique side full feed port device 2 (similar to the side center feed port device 1 with a single-feed port (10) disposed in a cavity for the injection molding die that forms the diffuser plate In the center of the side, but the flow channel (4) liquid diffusion plate material is added to fill the full mold hole. When the #散板 is produced, the distance from the center to the left and right ends is long because the finished product (diffusion plate) is required to be produced. (more than 3G (hnm or more), and the liquid diffusion plate raw material, the temperature decrease and the injection pressure loss, and the problem that the bonding wire 21 is generated at the two diagonal points farthest from the feed port; • The flow distance of the material of the liquid diffusion plate, so that when the thickness of the flow channel 200 is increased, although the material of the liquid diffusion plate can flow to both ends, the pressure of the injection is not uniform, and the thickness of the flow channel Increasing the tensile force generated by forming a very long long rod 'with a thickness of 2 mm with respect to the diffusion plate, causing a problem of warping deformation of the produced diffusion plate, and failing to produce pressure average, flatness, and uniformity of uniformity of luminance Board. In addition, the flawlessness is the length of the finished product, and the width and width of the finished product, which are produced by the side inlet device of the side of the figure, or by the full feed port device 2 as shown in Fig. 2. The difference in thickness and thickness is so great that the liquid diffusion plate material is injected into the cavity through the feed port 1 and the flow distance required to fill the 8% of the length, width and thickness is too large, so that when 6 1287672 is cured The internal stress increases and the problem of warpage of the finished product occurs. Therefore, how to improve the problems caused by the injection molding to produce a large-sized diffuser (for a flat panel display of 26 inches or more) is one of the directions that the industry is constantly researching. SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide an injection molding side port device for providing a diffusing plate for a backlight module to project a diffusing plate for producing a large size backlight module. An injection-molded side port device for preparing a diffuser plate of a backlight module is connected with a die-shaped liquid phase corresponding to an injection molding die for forming the diffuser plate The material is injected into the cavity through the side port design to form the diffusion plate. The invention is characterized in that the side port design comprises a plurality of feed ports communicating with the cavity, respectively fan-shaped and sequentially disposed on the hole One of the cavities is correspondingly formed on the die face of the side of the diffuser. [Embodiment] The foregoing and other technical contents, features and effects of the present invention are described below with reference to three preferred embodiments of the drawings. In the detailed description, the present invention will be clearly described. Before the present invention is described in detail, it is noted that in the following description, similar elements are denoted by the same reference numerals. A first preferred embodiment of the injection-molded side port device 3 of the diffuser plate of the backlight module is suitable for producing a diffuser plate of a backlight module by injection molding technology, especially a large size of 1 1287672 of 22 吋 to 26 吋. Diffuser plate. The U-injection forming side port device 3 communicates with the mold a corresponding to the formed diffusing plate that is injected into the inner mold'. The liquid diffusing plate material can be assembled through the injection molding side material, 1, ++ > The cavity is formed, and corresponding to the shape of the cavity, the diffusion plate is solidified. The injection molding side port device 3 is designed to include a two-shaped feed port 31, which is sequentially placed on the die surface of the cavity corresponding to the side of the diffusion plate and communicated with the cavity. The preferred design is the two-shaped shape. The feed port 31 is disposed on the die surface corresponding to the longer side of the diffusing plate, and is closely connected to each other in sequence. Of course, the two-shaped feed π 31 can also be disposed on the corresponding shaped diffuser plate according to actual needs. The die faces on the sides, or spaced apart from one another, are disposed on the die faces corresponding to the longer (or shorter) sides of the diffuser plate. When the two-shaped feed port 31 of the injection molding side port device 3 is used to shoot the expansion plate material of the liquid I, the liquid diffusion plate material is restricted by the two-shaped feed port 31 and is filled in series with the two sectors. Flowing, mutually offsetting the flow state of the liquid diffusion plate material which is too fast and too slow, and uniformly filling the full mold hole, and then solidifying and forming the diffusion plate under the state of the lowest internal stress, and the brightness uniformity is good, Large-size diffuser without warping. Referring to FIG. 4, a second preferred embodiment of the injection molding side port device 3 for preparing a diffusing plate of a backlight module is suitable for producing a diffusing plate of a backlight module by an injection molding technique, in particular 3 to 37 inches of large size diffuser. Similar to the above example, the difference lies only in the consideration of the flow distance of the liquid diffusion plate material in the length and width directions, and the relationship of the thickness of the diffusion plate 8 1287672, after the injection molding side port device 3, including the three-shaped feed port 31, in order to be placed in the cavity corresponding to the molding surface of the longer side of the diffuser, the fan-shaped feed port 31 in the middle is located at the center of the die face, the other two fan-shaped feed ports 31 symmetrically and in the middle The fan-shaped feed port 31 is disposed in close contact with each other; of course, the three-shaped feed port 31 may be disposed on the die surface corresponding to the new side of the diffuser plate according to actual needs, or may be disposed at intervals corresponding to each other. A molding surface on which the diffusion plate f is long (or short) is formed. When the three-shaped feed port 31 of the injection molding side port device 3 is injected into the liquid diffusion plate material, the liquid diffusion plate material is restricted by the three-shaped feed port 31 and flows in series with each other in a three-faceted surface state. , mutually offsetting the flow state of the liquid diffusion plate material which is too fast and too slow, and uniformly filling the full mold hole, thereby solidifying and forming the diffusion plate under the state of the lowest internal stress, and obtaining the uniformity of the brightness uniformity, and Large size diffuser without warping. Referring to FIG. 5, a third preferred embodiment of the injection molding side port device 3 for preparing a diffusing plate of a backlight module is suitable for producing a diffusing plate of a backlight module by injection molding technology, in particular It is a large-sized diffuser plate of 4 inches or more (this example is only illustrated by the actual size of 4〇吋 to 42吋). Similar to the previous two cases, the difference is only because the diffuser plate of 4 〇吋 or more has a larger length and width, and the ratio of the thickness to the thickness is more different. Therefore, the injection molding side port device 3" has a five-shaped feed port. 31, arranged symmetrically in the mold cavity corresponding to the molding surface of the longer side of the diffusion plate, so that when the liquid diffusion plate material is injected into the liquid, the liquid diffusion plate material is restricted by the five-shaped feed port 31 to five groups. The fan-shaped surfaces are filled in series with each other, and mutually offset the flow state of the liquid diffusion plate material which is too fast and too slow, and uniformly fills the full-mold hole 9 1287672', and then solidifies the diffusion plate under the condition of the minimum internal stress, and A large-sized diffusion plate having excellent uniformity of luminance and no warpage is obtained. As apparent from the above description, the present invention is used for preparing the injection-molded side port device 3, 3, 3" of the diffusion plate of the backlight module, The plurality of fan-shaped feed ports 31 are disposed on the die face corresponding to the longer side of the diffuser plate, and the plurality of fan-shaped feed ports 31 are limited to be poured into the liquid diffuser material, so that the liquid diffuser material is multi-arrayed. The surfaces are filled in series with each other and offset each other in a too fast and too slow flow state, and the mold holes are uniformly filled, and the diffusion plate is solidified under the condition of the lowest internal stress, and the uniformity of the brightness is obtained. Large-sized diffuser plate without warping phenomenon; it is indeed possible to improve the production of the finished product (diffusion plate) when the diffuser plate is produced by the central feed port device 1 and the side full feed port device 2 The ratio of length to width is too large, and the maximum flow distance 11 exceeds the flowable distance of the liquid diffusion plate material, the flow of the liquid diffusion plate material is not uniform, and the obvious bonding line 21 is generated at the two diagonals farthest from the feed inlet, and the internal stress The problem of excessive warpage of the finished product achieves the creative purpose of the present invention. 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. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the design of the central feed port on the side of the current injection molding technology; Fig. 2 is a schematic view showing the design of the 10 1287672 face feed port on the side of the current injection molding technology; A schematic diagram illustrating a first preferred embodiment of the injection-molded side port device for preparing a diffuser plate of the backlight module of the present invention; FIG. 4 is a schematic view showing the diffusion of the present invention for preparing a backlight module A second preferred embodiment of the injection-molded side port device of the plate; and FIG. 5 is a schematic view showing a third preferred embodiment of the injection-molded side port device for preparing the diffuser plate of the backlight module of the present invention. Example. 1287672 [Description of main component symbols] 100 Feed port 21 Bonding wire 200 Flow path 3 Injection molding side port device 1 Side center feed port device 3, Injection molding side port device 11 Flow distance 3" Injection forming side port device 2 side full feed inlet device 31 fan feed inlet
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