1224551 五、發明說明（1) 【發明所屬之技術領域】 本發明係關於一種製造高深寬比内孔元件之方法一， 尤指一可在粉末冶金成型製品内成型具高深寬比内孔之嶄 新設計者。 【先前技術】 按，目前在粉末射出成型製程中，若欲大量製造具備 高深寬比内孔元件的方法大多是在射出成型製程中，在模 具的模穴内使用相對數量的中心銷，在射出成型完成後再 將中心銷抽出而成型，即可在製造成型品内留下一與中心 銷外徑相同之内孔，然而，該種製造方法實存有下列顯著 之缺失，其主要原因如下： 1.該結構主要係藉由中心銷抽出後可在製造成品上留 下一與中心銷外徑相應之内孔，然而，為了使中心銷順利 退模，通常中心銷外周緣均設具傾斜之推拔斜度，故於成 型後之内孔，通常無法成型為一完全平直之内孔，而具有 一些微之傾斜度，此一成型方法對於要求尺寸精細之場所 ，根本就無法符合要求。 2 ·該製品之内孔若欲製造為極細小之内孔徑時，則中 心銷之外徑則需相對縮小，然而，過於細小之中心銷於退 模時，常有意外斷裂的情形存在，使斷裂的中心銷將殘留 於製成品内無法取出，致使該製品無法使用而形成不良品 〇 3.中心銷在抽出後造成製品之内孔表面十分粗糙，甚 至造成裂缝而成不良品，在實務上通常良率不高或需進一1224551 V. Description of the invention (1) [Technical field to which the invention belongs] The present invention relates to a method for manufacturing a high-aspect-ratio internal-hole component, especially a brand-new designer who can form a high-aspect-ratio internal hole in a powder metallurgy molding product. . [Previous technology] According to the current, in the powder injection molding process, if a large number of methods for manufacturing components with high aspect ratio internal holes are used in the injection molding process, a relative number of center pins are used in the cavity of the mold, and the injection molding is completed. After the center pin is pulled out and molded, an inner hole with the same outer diameter as the center pin can be left in the molded product. However, this manufacturing method has the following significant shortcomings, the main reasons are as follows: 1. This structure is mainly used to leave an inner hole corresponding to the outer diameter of the center pin on the finished product after being pulled out by the center pin. However, in order to smoothly eject the center pin, usually the center peripheral pin is provided with an inclined pusher. Slope. Therefore, the inner hole after molding cannot usually be formed into a completely straight inner hole, but it has some slight inclination. This molding method cannot meet the requirements for places with fine dimensions. 2 · If the inner hole of this product is to be made into a very small inner hole diameter, the outer diameter of the center pin needs to be relatively reduced. However, when the too small center pin is ejected from the mold, there are often accidental fractures. The broken center pin will remain in the finished product and cannot be taken out, making the product unusable and forming a defective product. 03. After the center pin is pulled out, the surface of the inner hole of the product is very rough, and even the crack becomes a defective product. In practice Usually the yield is not high or needs to be improved
1224551 五、發明說明（2) 步去除内孔之毛邊及表面研磨，惟，該内孔孔徑十分細 小，使得修整加工上相對的亦較為麻煩費事，進而增加後 續之加工成本。 4.中心銷所使用之長度有所限制，過長之中心銷於射 料時有偏位之情形產生，甚至於有折斷之可能，使得製造 之品質難以監控掌握。 【發明内容】 本發明之主要目的即在於提供一種製造高深寬比内孔 元件之方法一，旨為在粉末冶金射出成型之製程中所製得 之成品内成型具高深寬比細小孔徑之内孔，其方法為： 採一低熔點之高分子線先行設製成與所需成型内孔之 路徑相符的形狀，其中，該高分子線之線徑需與欲成型之 内孔孔徑相同，復將形狀已規劃設製完成之高分子線放置 在模具之模穴中’措由固定元件將南分子線端部固定於模 具上，使高位T線所設製之形狀得以在模具之模穴内維持 固定之形狀，再利用粉末射出成形製程技術在模穴内射出 成型生胚物件，進而將高分子線整個包覆在生胚物件内， 復以溶劑將生胚物件進行脫脂後再進行下一道緻密燒結之 處理程序，該生胚物件内之高分子線將因高溫燒結而汽化 消失，並在生胚物件内留有與高分子線線徑及路徑相同之 内孔；如此一來，即可在製品内形成一具高深寬比之内孔 者。 【實施方式】 如第一圖所示，本創作主要係提供一種在高熔點金屬1224551 V. Description of the invention (2) The burr and surface grinding of the inner hole are removed in a step. However, the hole diameter of the inner hole is very small, which makes the trimming process relatively troublesome and troublesome, and further increases the subsequent processing costs. 4. The length of the center pin is limited. The excessively long center pin may be misaligned when shooting, and may even break, making it difficult to monitor and control the manufacturing quality. [Summary of the Invention] The main purpose of the present invention is to provide a method 1 for manufacturing a high aspect ratio internal hole component. The purpose is to form an internal hole with a high aspect ratio and small aperture in a finished product obtained in the powder metallurgy injection molding process. The method is as follows: a polymer wire with a low melting point is first set to a shape conforming to the path of the inner hole to be formed, wherein the diameter of the polymer wire must be the same as the diameter of the inner hole to be formed; The planned polymer wire is placed in the cavity of the mold. The end of the south molecular wire is fixed to the mold by the fixing element, so that the shape set by the high-level T-line can be fixed in the cavity of the mold. Shape, and then use the powder injection molding process technology to inject green embryos into the mold cavity, and then cover the entire polymer wire with the green embryos, degrease the green embryos with solvent, and then perform the next dense sintering process. Procedure, the polymer wire in the raw embryo object will evaporate due to high temperature sintering, and an inner hole with the same diameter and path as the polymer wire will be left in the raw embryo object; This way, one can be formed wider than the inner hole are advanced within the article. [Embodiment] As shown in the first figure, this creation is mainly to provide a high melting point metal
1224551 五、發明說明（3) 與陶瓷粉末材料射出成型過程中製造設具高深寬比内孔之 元件，其製作方法如下： (a)首先，係採一低熔點之高分子線（1 )先行設製成與 所需成型内孔之路徑相符之形狀，其中，該高分子線（1 )之 線徑需與欲成型之内孔孔徑相同； (b )將形狀已規劃設製完成之高分子線（1 )放置在模具 (2 )之模穴（2 1 )中，藉由固定元件（3 )將高分子線（1 )外露於 模具（2 )之端部固定於模具（2 )上，使高份子線（1 )所設製之 形狀得以固定於模具（2 )之模穴（2 1 )内； (c )以粉末射出成形製程技術在模穴（2 1 )内射出成型生 胚物件（4 )，進而將高分子線（1 )整個包覆在生胚物件（4 )内 ， (d)利用溶劑將生胚物件（4 )進行脫脂後再進行下一道 緻密燒結之處理程序，其在高溫環境下進行燒結，而燒結 溫度約在攝氏1 0 0 0 °C〜1 6 0 0 °C左右； (e )生胚物件（4 )内之高分子線（1)將因生胚物件（4 )高 溫燒結且在前次脫脂的過程中留下連續性孔洞，因此高分 子線（1)將隨燒結溫度之升高而在攝氏約2 0 0 - 6 0 0 °C左右汽 化消失，並在生胚物件（4 )内留下與高分子線（1 )線徑及路 徑相同之内孔（4 1 ); 藉由上述製造過程，即可於進行燒結後在製品内形成 一具高深寬比之内孔，不但可改善上述之缺點，最重要的 是可大量生產具微細、高深寬比、光滑内孔之難加工材料 元件。1224551 V. Description of the invention (3) In the process of injection molding with ceramic powder materials, components with high aspect ratio internal holes are manufactured. The manufacturing method is as follows: (a) First, a low-melting polymer wire (1) is first set. It is made into a shape that conforms to the path of the inner hole to be formed. The diameter of the polymer wire (1) must be the same as the diameter of the inner hole to be formed. (B) The polymer wire whose shape has been planned and completed (1) Place it in the cavity (2 1) of the mold (2), and fix the polymer wire (1) exposed to the end of the mold (2) to the mold (2) by the fixing element (3), so that The shape set by the high-strength strand (1) can be fixed in the cavity (2 1) of the mold (2); (c) the powder injection molding process technology is used to inject the molded embryo object into the cavity (2 1) ( 4), and then the polymer thread (1) is entirely covered in the green embryo object (4), (d) the solvent is used to degrease the green embryo object (4), and then the next dense sintering process is performed. Sintering in a high temperature environment, and the sintering temperature is about 100 ° C ~ 16 0 ° C; (e) green embryo The polymer wire (1) in the piece (4) will be sintered at high temperature due to the green embryo and (4) will leave continuous holes during the previous degreasing process, so the polymer wire (1) will increase with the sintering temperature. At about 2000-600 ° C, the vaporization disappears, and the inner hole (4 1) with the same diameter and path as the polymer wire (1) is left in the green embryo object (4); by The above manufacturing process can form a high-aspect-ratio inner hole in the product after sintering, which can not only improve the above-mentioned disadvantages, but most importantly, it can mass-produce the difficult to process with fine, high-aspect-ratio and smooth inner holes. Material element.
1224551 五、發明說明（4) 綜上所述，本發明所提供之製造高深寬比内孔元件之 方法一，其可徹底改善粉末射出成型製程技術中成型微細 内孔所衍生之缺失，並可大量生產具微細、高深寬比、光 滑内孔之難加工材料元件，實較習用製成方法更具進步性 ，誠已合乎發明相關要件，爰依法提出申請。1224551 V. Description of the invention (4) In summary, the method for manufacturing a high-aspect-ratio internal hole component provided by the present invention 1 can completely improve the defects derived from the formation of fine internal holes in the powder injection molding process technology, and can greatly reduce The production of difficult-to-machine material elements with fine, high aspect ratio and smooth inner holes is more progressive than the conventional manufacturing method. It has already met the relevant requirements of the invention, and applied according to law.
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