1312726 第96128972號專利說明書修正本 修正日期：98年5月18日 九、發明說明： 【發明所屬之技術領域】 本發明係有關於一種射出成形模具組，特別係有關 於一種射出成形模具組之冷卻水路設計。 【先前技#ί】 首先請參閱第1圖，一般平面顯示器的背光模組中大 多包含有一矩形膠框Ρ’用以固定導光板或是其他光學元 件，其中膠框可透過射出成形的方式製作。接著請參閱第 2圖，用以製造膠框Ρ的射出成形模具組主要包括一公模 10、一母模20以及一注料嘴30，其中塑料可由注料嘴30 經過母模20内部的複數個熱澆道40而注入成形區域50 内，藉以製作前述膠框Ρ;如第2圖所示，前述成形區域 50係由公模10上之公模穴51以及母模20上之一母模穴 52所組成。 請一併參閱第3Α、3Β圖，前述公模穴51係位於公 模10之分模面101上，並且在公模10内部通常設有複數 條平行流道11，其位置則對應於前述的公模穴51。然而， 該些平行流道11中的冷卻循環流體大多僅能對於公模穴 51的局部位置進行冷卻，如此不僅容易造成冷卻區域不 均勻，同時亦無法達到良好的熱交換效果，其缺點則為射 出成形後需要耗費較長的冷卻時間，且成形後的產品容易 產生翹》曲變形。 再請一併參閱第4Α、4Β圖，前述母模穴52係位於 母模20之分模面201上，並且在傳統的母模20内部通常 僅設有一 S形流道21，其位置則對應於前述母模穴52 ; 然而該S形流道21不僅具有流路過長之缺點，且無法在 1312726 第96128972號專利說明書修正本 修正日期：98年5月18曰 母模穴52左、右兩侧邊521上的熱澆道之間形成有效的 熱阻隔。由於母模20内部不同的熱澆道之間容易因熱傳 導以及熱輻射而導致模面溫度上升，進而影響成形的品 質，因此如何設計一種更佳的冷卻水路以有效降溫並防止 模具内部溫度失衡始成為一重要之課題。 【發明内容】 本發明提供一種射出成形模具組，用以製造一矩形塑 膠件，包括一公模以及一母模。前述公模具有一矩形公模 穴以及至少一條彎折流道，其中彎折流道具有一第一段部 以及一第二段部，且第一、第二段部分別靠近且平行於公 模穴相鄰之兩側邊。前述母模與公模結合並具有一母模穴 以及複數個熱洗道，其中一塑料係經由等熱洗道注入公、 母模穴内，用以製造前述矩形塑膠件。 於一實施例中，前述公模更具有複數條平行流道，其 中前述平行流道係相互平行且橫越公模穴。 於一實施例中，前述公模具有兩條彎折流道，對應於 矩形公模穴的四個側邊。 於一實施例中，前述第一、第二段部組成一 L形結構。 於一實施例中，前述公模更具有一連接部，凸出於公 模穴外侧並且連接第一、第二段部。 於一實施例中，前述母模更具有至少一分區流道，前 述分區流道具有至少一曲折部，且曲折部的位置係介於相 鄰之熱洗道之間。 於一實施例中，前述曲折部具有一 V形或U形結構。 【實施方式】 1312726 • 第晰28972號側說明書修正本 修正日期：98年5月18日 請參閱第5圖，該圖表示—射出成形模具組中之公模 10内部冷卻水路以及公模穴51之示意圖。於本實施例中 的公模10内部冷卻水路主要包括複數條平行流道12以及 兩，彎折流道13，其中該些平行流道12係朝同向延伸並 ，杈越公杈穴51相對之兩側邊512 ;前述彎折流道則 與平行流道12相互獨立，其中每一彎折流道13具有一第 又ί上31以及一第二段部132。如第5圖所示，前述第 :位=部上31、132係相互連接並組成-[形結構， 5、12。，刀別罪近且平行於公模穴51相鄰之側邊511、 可二:==:==道二 塑此外，_ 仗攻形日可產生趣曲變形。 再請參閱第6圖，於另一管祐办 路除了包括複數條平行=中的=内部冷卻水 道14。於本實施例中’每：：個^折t/j括兩條彎折流 —段部141、個弓折机道14分別具有一第 —、第二段部141、142八^1以連接部143，前述第 的側邊51】、么、、刀別罪近且平行於公模穴51相鄰 側，用以連接前别述連接部143則凸出於公模穴51外 發明之冷tit弟一、第二段部⑷、1仏然而’本 狀或位置，可視不同設計需求而彈性地變化其形 側，使其分別_^兩條幫折流道圍繞於公模穴51的外 叫應於矩形公模穴51的四個側邊5】卜512， 1312726 第96128972號專利說明書修正本 修正日期：98年5月18日 藉以透過環繞產品全周的方式來提高冷卻效率。 接著請參閱第7圖，該圖係表示前述射出成形模具組 中之母模20内部冷卻水路以及母模穴52之示意圖。於本 實施例中之母模20内部冷卻水路主要包括四條分區流道 22，分別對應於矩形母模穴52上的四個局部區域，其中 每一條分區流道22皆具有至少一個曲折部221。特別地 是，前述每一曲折部221可為V形或U形結構，其位置 則介於母模20内部相鄰的熱澆道G之間，用以阻隔不同 熱澆道G間所產生的熱輻射與熱傳導，進而可保持模面 的溫度平衡。由於本實施例中的分區流道22皆相互獨立 且分別對應於母模穴52的四個局部區域，如此可避免流 路太長而導致入水段222與出水段223溫差過大，同時可 在不同熱澆道G之間形成有效的熱阻隔。 综上所述，本發明針對射出成形模具組中的公、母模 設計出一種冷卻水路，其中在公模内部可配置複數條平行 流道以及一組彎折流道，並藉由環繞產品全周的方式以提 升冷卻效率；此外，在母模内部則可配置複數條分區流 道，其中每一條分區流道皆具有至少一個曲折部，且每一 曲折部的位置係介於母模内部相鄰的熱澆道之間，用以阻 隔相鄰熱澆道間所產生的熱輻射與熱傳導。本發明除了可 縮短成形後的冷卻時間，同時可在母模的熱澆道之間形成 有效的熱阻隔，藉以保持模具内部的温度平衡，不僅適用 於生產平面顯示器背光模組中的矩形膠框，更可廣泛地用 以生產其他各種矩形塑膠件。 【圖式簡單說明】 第1圖係表示一矩形膠框之示意圖； ♦1312726 第96128972號專利說明書修正本 修正日期：98年5月18日 , 第2圖係表示一射出成形模具組之剖面圖； • 第3A、3B圖係表示一習知射出成形模具組中之公模 内部冷卻水路以及公模穴之示意圖； 第4A、4B圖係表示一習知射出成形模具組中之母模 内部冷卻水路以及母模穴之示意圖； 第5圖係表示一射出成形模具組中的公模内部冷卻水 路以及公模穴之不意圖， 第6圖係表示另一實施例之射出成形模具組中的公模 内部冷卻水路以及公模穴之示意圖；以及 第7圖係表示一射出成形模具組中的母模内部冷卻水 路以及母模穴之示意圖。 【主要元件符號說明】 10〜公模； 13、14〜彎折流道； 132、142〜第二段部 20〜母模； 22〜分區流道； 222〜入水段， 30〜注料嘴； 50〜成形區域； 52〜母模穴； 101、201〜分模面； 11、12〜平行流道； 13卜141〜第一段部； ;143〜連接部； 21〜S形流道； 221〜曲折部； 223〜出水段； 40、G〜熱洗道； 51〜公模穴； 511、512、521 〜側邊； P〜膠框。1312726 Patent Specification No. 96128972 Revision Date: May 18, 1998 IX. Description of the Invention: [Technical Field] The present invention relates to an injection molding die set, and more particularly to an injection molding die set Cooling waterway design. [Previous technology #ί] First, please refer to Fig. 1. The backlight module of a general flat panel display mostly includes a rectangular plastic frame Ρ' for fixing the light guide plate or other optical components, wherein the plastic frame can be produced by injection molding. . Next, referring to FIG. 2, the injection molding die set for manufacturing the plastic frame 主要 mainly includes a male die 10, a female die 20 and a injection nozzle 30, wherein the plastic can pass through the injection nozzle 30 through the inside of the female die 20. The hot runner 40 is injected into the forming region 50 to form the plastic frame Ρ; as shown in FIG. 2, the forming region 50 is formed by the male mold 51 on the male mold 10 and one female mold on the female mold 20. The hole 52 is composed of. Referring to Figures 3 and 3, the male mold 51 is located on the parting surface 101 of the male mold 10, and a plurality of parallel flow paths 11 are usually provided inside the male mold 10, the positions of which correspond to the foregoing. Male model point 51. However, most of the cooling circulating fluids in the parallel flow passages 11 can only cool the local position of the male mold cavity 51, so that not only the cooling region is uneven, but also a good heat exchange effect cannot be achieved, and the disadvantage is It takes a long cooling time after injection molding, and the formed product is prone to warp deformation. Referring again to Figures 4 and 4, the aforementioned mother mold cavity 52 is located on the parting surface 201 of the female mold 20, and usually only an S-shaped flow path 21 is provided inside the conventional female mold 20, and its position corresponds to However, the S-shaped flow passage 21 not only has the disadvantage that the flow path is too long, and can not be corrected in the patent specification of 1312726 No. 96128972. This modification date: May 18, 1998, the female mold hole 52 left and right An effective thermal barrier is formed between the hot runners on the side edges 521. Since the different hot runners inside the master mold 20 are likely to increase the temperature of the mold surface due to heat conduction and heat radiation, thereby affecting the quality of the forming, how to design a better cooling water path to effectively cool the temperature and prevent the temperature inside the mold from being unbalanced Become an important issue. SUMMARY OF THE INVENTION The present invention provides an injection molding die set for manufacturing a rectangular plastic member including a male mold and a female mold. The male mold has a rectangular male mold hole and at least one curved flow passage, wherein the bent flow prop has a first section and a second section, and the first and second sections are respectively adjacent to and parallel to the male cavity phase. On both sides of the neighbor. The master mold and the male mold are combined and have a female mold cavity and a plurality of hot wash lanes, wherein a plastic is injected into the male and female mold holes through the equal heat wash lane to manufacture the rectangular plastic member. In one embodiment, the male mold further has a plurality of parallel flow paths, wherein the parallel flow paths are parallel to each other and traverse the male mold cavity. In one embodiment, the male mold has two curved flow passages corresponding to the four sides of the rectangular male mold cavity. In one embodiment, the first and second segments form an L-shaped structure. In one embodiment, the male mold further has a connecting portion protruding from the outside of the male cavity and connecting the first and second segments. In one embodiment, the master mold further has at least one divided flow channel, the partition flow channel has at least one meandering portion, and the position of the meandering portion is between the adjacent hot wash lanes. In one embodiment, the meandering portion has a V-shaped or U-shaped configuration. [Embodiment] 1312726 • No. 28972 side manual revision This revision date: May 18, 1998, please refer to Fig. 5, which shows the internal cooling water passage of the male mold 10 and the male mold cavity 51 in the injection molding die set. Schematic diagram. The internal cooling water passage of the male mold 10 in the present embodiment mainly includes a plurality of parallel flow passages 12 and two bending flow passages 13, wherein the parallel flow passages 12 are extended toward the same direction, and the 杈 杈 杈 51 51 opposite The two sides 512; the bending flow passages are independent of the parallel flow passages 12, wherein each of the bending flow passages 13 has a first upper portion 31 and a second second portion 132. As shown in Fig. 5, the above-mentioned first position = 31, 132 are connected to each other and constitute - [shaped structure, 5, 12. The knife is close to the sin and parallel to the side of the male mold 51 adjacent to the side 511, can be two: ==: == Dao 2 In addition, _ 仗 仗 形 可 可 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 。 Referring again to Figure 6, in addition to the plurality of parallel roads = in the middle = internal cooling channel 14 . In the present embodiment, each of the 'each: two folds t/j includes two bending flows—the segment portion 141 and the plurality of bowing paths 14 respectively have a first-and second-stage portion 141, 142 八1 to be connected. The portion 143, the first side 51, the sin, the knife is close to and adjacent to the adjacent side of the male mold cavity 51, and is used for connecting the front connecting portion 143 to protrude from the public mold cavity 51. The younger part of the second section (4), 1 仏 ' ' 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本 本It is called the four sides of the rectangular male mold 51. 5 512, 1312726 Patent No. 96128972 Amendment of this amendment date: May 18, 1998 to improve the cooling efficiency by surrounding the product throughout the week. Next, referring to Fig. 7, there is shown a schematic view of the internal cooling water passage and the female mold cavity 52 of the master mold 20 in the above-described injection molding die set. The internal cooling water passage of the female mold 20 in the present embodiment mainly includes four divided flow passages 22 corresponding to four partial regions on the rectangular female mold cavity 52, wherein each of the divided flow passages 22 has at least one bent portion 221 . In particular, each of the above-mentioned meandering portions 221 may be a V-shaped or U-shaped structure, and the position thereof is between the adjacent hot runners G inside the female mold 20 for blocking the difference between the different hot runners G. Thermal radiation and heat conduction, which in turn maintains the temperature balance of the die face. Since the partitioned flow passages 22 in the embodiment are independent of each other and respectively correspond to the four partial regions of the female mold cavity 52, the flow path can be prevented from being too long, and the temperature difference between the water inlet portion 222 and the water outlet portion 223 is too large, and can be different. An effective thermal barrier is formed between the hot runners G. In summary, the present invention designs a cooling water passage for the male and female molds in the injection molding die set, wherein a plurality of parallel flow passages and a set of curved flow passages can be disposed inside the male mold, and by surrounding the entire product The method of the week is to improve the cooling efficiency; in addition, a plurality of divided flow channels may be disposed inside the master mold, wherein each of the divided flow channels has at least one bent portion, and the position of each of the bent portions is interposed between the internal portions of the female mold Between the adjacent hot runners to block the heat radiation and heat conduction between adjacent hot runners. In addition to shortening the cooling time after forming, the invention can form an effective thermal barrier between the hot runners of the master mold, thereby maintaining the temperature balance inside the mold, which is not only suitable for producing rectangular plastic frame in the flat panel display backlight module. It can be widely used to produce a variety of other rectangular plastic parts. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing a rectangular plastic frame; ♦ 1312726 Patent Specification No. 96128972 Revision Date: May 18, 1998, Fig. 2 shows a sectional view of an injection molding die set 3A, 3B are schematic views showing the internal cooling water passage and the male mold hole of a conventional injection molding die set; FIGS. 4A and 4B are diagrams showing the internal cooling of the female mold in a conventional injection molding die set; Schematic diagram of the waterway and the female mold hole; Fig. 5 is a schematic view showing the internal cooling water passage and the male mold cavity of the male mold in the forming mold set, and Fig. 6 is a view showing the male mold in the injection molding mold set of another embodiment. A schematic diagram of the internal cooling water passage and the male mold cavity of the mold; and Fig. 7 is a schematic view showing the cooling water passage and the female mold cavity of the master mold in the injection mold group. [Main component symbol description] 10~mold; 13, 14~bend runner; 132, 142~second section 20~mother; 22~partition runner; 222~inlet, 30~ injection nozzle; 50~formed area; 52~mother mold hole; 101,201~ split mold surface; 11,12~parallel flow path; 13b 141~first section; ;143~joining section; 21~S-shaped flow channel; 221 ~ tortuous part; 223 ~ water outlet section; 40, G ~ hot wash road; 51 ~ male mold hole; 511, 512, 521 ~ side; P ~ plastic frame.