201024067 . · 六、發明說明： 【發明所屬之技術領域】 本發明關於一種中空品的成形裝置及成形方法，其利 用氣體和水的特徵，能實現中空品内的中空部分的壁面的 均勻化。 【先前技術】 一直以來，例如作為合成樹脂製的管體等中空品的成 形方法，有擠壓成形、拉拔成形、吹氣成形等各種方法， 但在例如使用成形模具並向被填充在成形模具的空腔内的 ❹ 成形材料内注入高壓的水來形成中空部分、從而成形中空 品的成形機時，中空部分的壁面的粗糙度不均勻而形成粗 糙面，因而很難製造高品質的中空品。 作為本發明相關的現有技術，例如在專利文獻1中提 出了一種成形裝置，該成形裝置向形成中空品的模具的空 腔内供給由熱固性樹脂組成的樹脂材料，使上述空腔被大 致完全填滿，並向被供給到空腔内的樹脂材料内注入惰性 ❹ 氣體等來形成中空部，成形中空品。 上述成形裝置的情況下，由於在中空部的形成時使用 惰性氣體等，因此能推斷成形結束後在中空品的冷卻上要 有時間。 專利文獻1 :日本特開2003-170462號公報 【發明内容】 (發明所欲解決之課題） 本發明要解決的技術問題是不存在使氣體和水在中 4 321580 201024067 的壁 的 分的形成中發揮作用、能實現中空郜八的 、空品的々置:=樣的_性樹心 (解決課題之手段） 形機3明:=:=:置最主要的特徵是具有:戍 成形模具包括形成成形用材料的成形品形狀:^具，該 ❾收納剩餘材料的剩餘材料室；塞子（stopper)，該^腔部和 述空腔部與剩餘材料室彼此連通或隔斷；材料子使上 材：庄入：向上述空腔部内注入材料;壓縮空氣聞該 該堡縮空氣射出閥使其射出端面向剩餘材料室， 形成後成形品内部的殘留水；氣體/水射出單元 水射出單元被配置於上述成形機本體的外部，射ζ氣體/ 水；氣體/水流路，該氣體/水流路的—端侧作為^體= 水射出單元的氣體或水的注人端，另—端側作為二 ❹的排出端；氣體/水射出閥，該氣體/水射出閥配置於^二 氣體/水流路的中途位置與上述空腔部的注入侧之間 /水排出闕，該氣體/水排出閥安裝於上述氣體/水流路= 出端的下部，打開或關閉氣體/水流路的另一端側；以 制裝置，該控制裝置進行上述成形機本體、氣心水射出= 元的成形處理（prQcess)的程式控制，構成為進行：向上述 空腔部内填充熱塑性樹脂材料；透過注入氣體、水形成： 要成形的中空品的中空部分並使剩餘材料流入剩餘材料 室；按水、氣體的順序進行排出；用屢縮空氣冷卻中空品 321580 5 201024067 ^ 的中空部分；透過打開成形模具來取出由熱塑性樹脂製成 的中空品。 (發明之效果） 根據申請專利範圍第1、2項所述的發明，包括：成 形機本體，該成形機本體由第一成形模具、第二成形模具 構成，該第一成形模具、第二成形模具具有被塞子隔開的 中空的空腔部和剩餘材料室；材料注入口，該材料注入口 向空腔部内注入熱塑性樹脂材料；壓縮空氣射出閥，該壓 縮空氣射出閥排出内部的殘留水；設於第二成形模具的氣 ❹ 體/水射出單元、氣體/水流路、氣體/水射出閥；以及打開 或關閉氣體/水流路的另一端側的氣體/水排出閥，而且還 包括向成形機本體供給來自控制裝置的氣體/水的氣體/水 射出單元，根據上述結構，巧妙利用氣體和水的特徵，實 現中空品的中空部分的壁面均勻化和冷卻效率的提升帶來 的成形周期的縮短化，據此，能得到品質良好的由熱塑性 樹脂製成的中空品，此外，若進行射出水的溫度控制，則 q 能實現並提供一種還能實現中空品的内表面高品質的中空 品的成形裝置。 根據申請專利範圍第3、4項所述的發明，透過使用 申請專利範圍第1、2項所述的發明的成形裝置，按照順序 進行熱塑性樹脂材料的填充工序、氣體的注入工序、水的 射出工序、水的排出工序及透過壓縮空氣進行的水的排出 工序、成形後的中空品的取出工序，在成形時巧妙利用氣 體和水的特徵，實現中空品的中空部分的壁面均勻化和冷 6 321580 201024067 卻效率的提升帶來的成形周期的縮短化，能得到品 的由熱塑性樹脂製成的中空品，此外，若進行射出的: 溫度控制，則能實現並提供一種還能實現中空品的 兩品質的中空品的成形裝置。 【實施方式】 本發明的目的在於實現並提供一種特別巧妙地 體和水的特徵、能實現中空品内的中空部分的壁面: ❹形周期的縮短化的由熱塑性樹脂製成的中空品的成形 的，=的中空品的成形裝置透過以下結構實現上述目 的第二;本體，該成形機本體包括能打開關閉 該空妒都^第一成形模具；空腔部和剩餘材料室， 和上側。，上^材料室分別設於上述成形機本體内的下側 述剩餘射二Γ部形錢_㈣喊形品形狀部，上 ❾=:r彼此連通或隔斷：料== 氣射二閥™ 面向剩餘材料—、；ί 一成添樣具的上部，使其射出端 氣體/水射出~至排出中空形成後成形品内部的殘留水； 機本體的外部早：’出該氣氣體體::㈣ 水射出模具的下部，並且一端侧作為來自氣體/ =續或水紐 料導入空間部，該材料導入空間部設置於上 321580 7 201024067 述空腔部的下側；氣體/水射出閥，該氣體/水射出閥配置 於上述氣體/水流路的中途位置與材料導入空間部之間；氣 體/水排出閥，該氣體/水排出閥安裝於上述氣體/水流路的 排出端的下部，打開或關閉氣體/水流路的另一端側；以及 控制裝置，該控制裝置進行上述成形機本體、氣體/水射出 單元的成形處理中的包括水溫控制的程式控制，構成為進 行：向上述空腔部内填充熱塑性樹脂材料；透過注入氣體 或水、形成所要成形的中空品的中空部分並使剩餘材料流 入剩餘材料室；按水、氣體的順序進行排出；用壓縮空氣 ® 冷卻中空品的中空部分；透過打開第一成形模具、第二成 形模具來取出由熱塑性樹脂製成的中空品。 實施例 以下參照第1圖至第9圖對本發明實施例的中空品30 的成形裝置1進行詳細說明。 本實施例的中空品30的成形裝置1是向被填充在空 腔部5内的由熱塑性樹脂組成的成形用材料（在第2圖至第 q 8圖中用塗黑表示）射出氣體和水來成形中空的由熱塑性 樹脂製成的成形品30的裝置。在此，氣體是指空氣、惰性 氣體、二氧化碳等各種氣體，以此進行以下說明。 本實施例的中空品30的成形裝置1具有：成形機本 體2，該成形機本體2包括形成相對面能接合、分離的第 一成形模具3、第二成形模具4;以及中空的空腔部5和剩 餘材料室6，該中空的空腔部5和剩餘材料室6分別形成 於上述成形機本體2内的下側和上侧。 8 321580 201024067 上述空腔部5透過將上述第一成形模具3、第二成形 模具4的相對區域的整體加工成與成形品的外觀形狀對 應、作為成形品形狀部7而形成。 上述剩餘材料室6被形成為與上述空腔部5連通，在 中空形成時收納剩餘材料，並且如第1圖所示，在上述空 腔部5與剩餘材料6之間能插入拔出地配置有能沿箭頭方 向移動的隔開用塞子8。 本實施例的中空品30的成形裝置1復具有：材料注 ® 入口 9,該材料注入口 9設於第一成形模具3，向空腔部5 内注入由熱塑性樹脂組成的材料；壓縮空氣射出閥10，該 壓縮空氣射出閥10配置於第二成形模具4的上部，使其射 出端面向剩餘材料室6，排出中空形成後成形品内部的殘 留水；氣體/水射出單元11，該氣體/水射出單元11被配 置於成形機本體2的外部，射出氣體或水；氣體/水流路 12，該氣體/水流路12被設於第二成形模具4的下部，並 φ且一端側作為來自氣體/水射出單元11的氣體或水的注入 端，另一端作為氣體或水的排出端；材料導入空間部5a， 該材料導入空間部5a設於上述空腔部5的下侧；氣體/水 射出閥13，該氣體/水射出閥13配置於上述氣體/水流路 12的中途位置與材料導入空間部5a之間；以及氣體/水排 出閥14，該氣體/水排出閥14安裝於上述氣體/水流路12 的排出端的下部，打開或關閉氣體/水流路12的另一端侧。 本實施例的中空品30的成形裝置1復包括由成形控 制器21和附屬的獨立型的操作/控制盤22組成的控制裝 9 321580 201024067 置。 上述成形控制器21是射出氣體、水的設備，並且是 包括能高效率地控制氣體、水的壓力和流量的程式的高擴 展性設備，在設備内部安裝有超高壓泵、增壓機、蓄壓器 (accumulator)、附帶溫度調節功能的儲水容器等，構成為 對上述氣體/水射出單元11供給氣體、水。 從上述成形控制器21向上述氣體/水射出單元11的 氣體、水的供給形態能選擇只供給高壓氣體、只供給水、 供給氣體和水兩者等之設備構成。 據此，本實施例的中空品30的成形裝置1能構成為： 對應透過注入高壓氣體來形成中空的產品、透過注入水來 形成中空的產品和透過注入氣體和水兩者來形成中空的產 品等各種成形方法。 上述操作/控制盤22構成為實行本實施例的中空品30 的成形裝置1中的成形處理的程式控制。 作為在上述成形控制器21與成形機本體2之間通信 的信號，能列舉如下：安全門、緊急停止等安全相關的交 互信號；打開成形模具、關閉成形模具、允許材料射出、 材料射出/填充/壓力保持結束等成形模具相關的交互信號 等。 另外，若是設於成形機本體側的未圖示的控制裝置中 附加有與上述情況等同的程式的成形機，則也能從成形機 側直接實行成形處理的控制。 接著，對使用本實施例的成形裝置1的中空品30的 10 321580 201024067 . 成形方法進行說明。 , (〗）材料的填充工序[Technical Field] The present invention relates to a hollow product forming apparatus and a forming method which can utilize the characteristics of gas and water to achieve uniformization of the wall surface of the hollow portion in the hollow product. [Prior Art] For example, various methods such as extrusion molding, drawing molding, and air blowing are used as a method of molding a hollow product such as a tubular body made of a synthetic resin, but the molding is performed, for example, using a molding die. When a high-pressure water is injected into the 成形 forming material in the cavity of the mold to form a hollow portion, and the molding machine for forming the hollow product is formed, the roughness of the wall surface of the hollow portion is uneven to form a rough surface, so that it is difficult to manufacture a high-quality hollow. Product. As a related art related to the present invention, for example, Patent Document 1 proposes a molding apparatus that supplies a resin material composed of a thermosetting resin into a cavity of a mold for forming a hollow product, so that the cavity is substantially completely filled. When it is full, an inert gas or the like is injected into the resin material supplied into the cavity to form a hollow portion, and the hollow product is molded. In the case of the above-mentioned forming apparatus, since an inert gas or the like is used in the formation of the hollow portion, it can be estimated that there is a time for cooling the hollow product after the completion of the molding. [Patent Document 1] JP-A-2003-170462 SUMMARY OF INVENTION Technical Problem The technical problem to be solved by the present invention is that there is no formation of a gas and water in the wall of the middle 4 321 580 201024067. Play a role, can achieve a hollow, empty, arbitrage: = _ sex tree (the means to solve the problem) Machine 3 Ming: =: =: The most important feature is: 戍 forming mold including a shape of a molded article forming a molding material: a crucible containing a remaining material chamber of the remaining material; a stopper, the cavity portion and the cavity portion and the remaining material chamber are connected or disconnected from each other; : Zhuang In: injecting material into the cavity portion; the compressed air smells the Fortress air injection valve so that the injection end faces the remaining material chamber, forming residual water inside the post-molded product; the gas/water injection unit water injection unit is configured Outside the body of the forming machine, a gas/water flow; a gas/water flow path, the end side of the gas/water flow path is used as a body/body of the water injection unit, and the other end side is The discharge end of the crucible; a gas/water injection valve disposed between the middle of the gas/water flow path and the injection side of the cavity portion/water discharge port, the gas/water discharge valve being installed in the gas/water flow Road = the lower part of the outlet, opens or closes the other end side of the gas/water flow path; and the control device performs the program control of the forming machine body and the tempering water injection = element forming process (prQcess), and is configured to perform Filling the cavity portion with a thermoplastic resin material; forming a hollow portion of the hollow product to be formed by injecting gas or water; and flowing the remaining material into the remaining material chamber; discharging in the order of water and gas; cooling the hollow with the contracted air The hollow portion of the product 321580 5 201024067 ^; the hollow product made of a thermoplastic resin is taken out by opening the forming mold. According to the invention of claim 1 and 2, the invention includes: a molding machine body comprising a first forming die and a second forming die, the first forming die and the second forming The mold has a hollow cavity portion and a remaining material chamber separated by a plug; a material injection port, the material injection port injects a thermoplastic resin material into the cavity portion; and a compressed air injection valve, the compressed air injection valve discharges residual water inside; a gas/water injection unit, a gas/water flow path, a gas/water injection valve provided in the second molding die, and a gas/water discharge valve that opens or closes the other end side of the gas/water flow path, and further includes forming The gas/water injection unit of the gas/water from the control unit is supplied to the machine body, and according to the above configuration, the characteristics of the gas and the water are utilized in an ingenious manner, and the wall surface uniformity of the hollow portion of the hollow product and the cooling cycle are improved. According to this, a hollow product made of a thermoplastic resin having good quality can be obtained, and if temperature control of the injected water is performed, q It is possible to realize and provide a forming device that can realize high quality hollow products on the inner surface of hollow products. According to the invention described in the third and fourth aspects of the invention, the molding process of the invention described in the first and second aspects of the invention is carried out, and the filling process of the thermoplastic resin material, the gas injection step, and the water injection are sequentially performed. In the step of discharging the water, the step of discharging the water by the compressed air, and the step of taking out the hollow product after the molding, the characteristics of the gas and the water are skillfully utilized during the molding, and the wall surface of the hollow portion of the hollow product is uniformized and cooled. 321580 201024067 The shortening of the forming cycle due to the increase in efficiency enables the hollow product of thermoplastic resin to be obtained. In addition, if the temperature is controlled, it can realize and provide a hollow product. A forming device for two quality hollow products. [Embodiment] An object of the present invention is to realize and provide a particularly delicate body and water feature, which can realize the wall surface of a hollow portion in a hollow product: the formation of a hollow product made of a thermoplastic resin with a shortened period of a meandering shape The forming device of the hollow product of the =, the second object is achieved by the following structure; the body comprises a first forming die capable of opening and closing the opening; a cavity portion and a remaining material chamber, and an upper side. The upper material chambers are respectively disposed on the lower side of the body of the forming machine, and the remaining shots of the second part of the shape are _ (4) the shape of the shouting shape, and the upper jaw =: r is connected or disconnected from each other: material == gas jet two valve TM For the remaining material—,; 一 成 添 添 添 添 , , 添 添 添 添 添 添 添 添 添 添 添 一 一 一 一 一 一 添 添 添 添 添 添 添 添 添 添 添 添 添 添 添 添 添 添 添 添 添 添 添 添(4) Water is sprayed out of the lower part of the mold, and one end side is used as a gas/renewing or watering material introduction space portion, and the material introduction space portion is disposed at a lower side of the upper portion of the cavity portion; 321580 7 201024067; a gas/water injection valve, The gas/water injection valve is disposed between the intermediate position of the gas/water flow path and the material introduction space portion; and the gas/water discharge valve is installed at a lower portion of the discharge end of the gas/water flow path to open or close a control device that performs program control including water temperature control in forming the main body of the molding machine and the gas/water injection unit, and is configured to perform the flow to the cavity portion Filling a thermoplastic resin material; injecting a gas or water, forming a hollow portion of the hollow product to be formed and flowing the remaining material into the remaining material chamber; discharging in the order of water and gas; and cooling the hollow portion of the hollow product with compressed air®; The hollow product made of a thermoplastic resin is taken out by opening the first forming die and the second forming die. EXAMPLES Hereinafter, a molding apparatus 1 for a hollow product 30 according to an embodiment of the present invention will be described in detail with reference to Figs. 1 to 9 . The molding apparatus 1 of the hollow product 30 of the present embodiment is a molding material (shown in black in FIGS. 2 to q8) which is filled with a thermoplastic resin filled in the cavity portion 5 to emit gas and water. A device for forming a hollow molded article 30 made of a thermoplastic resin. Here, the gas refers to various gases such as air, inert gas, and carbon dioxide, and the following description will be made. The molding apparatus 1 of the hollow product 30 of the present embodiment has a molding machine body 2 including a first molding die 3 and a second molding die 4 which are capable of engaging and separating opposite faces, and a hollow cavity portion. 5 and a remaining material chamber 6, the hollow cavity portion 5 and the remaining material chamber 6 are formed on the lower side and the upper side in the former body 2, respectively. 8 321580 201024067 The cavity portion 5 is formed as a molded article shape portion 7 by processing the entire opposing regions of the first molding die 3 and the second molding die 4 in correspondence with the outer shape of the molded article. The remaining material chamber 6 is formed to communicate with the cavity portion 5, and accommodates the remaining material when the hollow is formed, and is inserted and removed between the cavity portion 5 and the remaining material 6 as shown in Fig. 1 . There is a plug 8 for separation that can move in the direction of the arrow. The forming apparatus 1 of the hollow product 30 of the present embodiment further has a material injection inlet 9 provided in the first molding die 3, and a material composed of a thermoplastic resin is injected into the cavity portion 5; compressed air is emitted. The valve 10, the compressed air injection valve 10 is disposed at an upper portion of the second molding die 4 such that the injection end faces the remaining material chamber 6, and discharges residual water inside the hollow formed molded product; the gas/water injection unit 11, the gas/ The water injection unit 11 is disposed outside the molding machine body 2 to emit gas or water; a gas/water flow path 12 which is provided at a lower portion of the second molding die 4 and has φ and one end side as a gas. The gas or water injection end of the water injection unit 11 and the other end serves as a gas or water discharge end; the material introduction space portion 5a is provided on the lower side of the cavity portion 5; the gas/water is emitted In the valve 13, the gas/water injection valve 13 is disposed between the intermediate position of the gas/water flow path 12 and the material introduction space portion 5a, and a gas/water discharge valve 14 to which the gas/water discharge valve 14 is attached. Water flow A lower discharge end 12, opening or closing the other end of the gas / water flow path 12 side. The forming apparatus 1 of the hollow product 30 of the present embodiment further includes a control unit 9 321580 201024067 which is composed of a forming controller 21 and an attached independent type operation/control panel 22. The forming controller 21 is a device that emits gas and water, and is a highly expandable device that includes a program that can efficiently control the pressure and flow rate of gas and water. An ultrahigh pressure pump, a supercharger, and a pump are installed inside the device. An accumulator, a water storage tank with a temperature adjustment function, and the like are configured to supply gas and water to the gas/water injection unit 11. The supply form of the gas and water from the forming controller 21 to the gas/water emitting unit 11 can be selected from a device configuration in which only high-pressure gas, only water, supply gas, and water are supplied. According to this, the molding apparatus 1 of the hollow product 30 of the present embodiment can be configured to form a hollow product by injecting a high-pressure gas, forming a hollow product by injecting water, and forming a hollow product by injecting both a gas and water. Various forming methods. The operation/control panel 22 is configured to execute the program control of the forming process in the molding apparatus 1 of the hollow product 30 of the present embodiment. As a signal for communication between the above-described forming controller 21 and the molding machine body 2, safety-related interaction signals such as safety gates and emergency stop can be cited; opening of the molding die, closing of the molding die, allowing material ejection, material injection/filling/ The interaction signal related to the forming die such as the end of the pressure is maintained. In addition, when a molding machine having a program equivalent to the above is added to a control device (not shown) provided on the main body side of the molding machine, the molding processing can be directly controlled from the molding machine side. Next, a molding method of 10 321 580 201024067 of the hollow product 30 using the molding apparatus 1 of the present embodiment will be described. , (〗) Filling process of materials
首先，如第2圖所示，使成形機本體2的第一成形模 具3與第二成形模具4形成接合狀態（關閉狀態），並且透 過上述塞子8形成用塞子切斷向剩餘材料室6的漭入的壯 態，從材料注入口 9向成形機本體2的空腔部5填充成= 用的由熱塑性樹脂組成的材料。 V ❹ 此時，將填充條件設定為空腔部5表面的成形品形狀 部7的形狀能充分複製的流量和壓力。 此外 马防止在填充材料後產生材料洩漏的不理想情 况打開上述氣體/水排出閥14，從成形控制器Η向氣體 U供給氣體’並使其在氣體/水流路12 :氣 體/水排出閥14内流通。 ❹ (2)氟體的注入工序 如第3圖所示，材料充 並打開上職子8，_上序、、、°束彳㈣賴力保持， 上述成形控制it 21經由體/水排㈣14，然後，從 路12、氣俨/ k ^山 體/水射出單元11、氣體/水流 的氣體，並在、虫埴奋閥13向空腔部5注入適量的預定壓力 的1並在破填充的材料中形成中空部分31。 而使用不__，考4=的中空品30的材料的不同 水的壓力魔縮而溫度上；二入'氣體會被緊接著射出的 焦的材料，則中六。30 ^如，右是溫度上升會發生燒 〆入氮氣等，防止中空品30 321580 201024067 的内表面燒焦。 透過被注入上述空腔部5内的氣體的氣壓的作用，與 中空部分31相當的剩餘材料如第3圖所示被向剩餘材料室 推壓流動。 (3) 水的射出工序 接著，如第4圖所示，氣體填充工序一結束，便從上 述成形控制器21經由氣體/水射出單元11、氣體/水流路 12、氣體/水射出閥13開始向空腔部5射出預定壓力的水 來進行中空部分31的形成。 此時，透過操作員對上述操作/控制盤22進行操作， 用程式來控制向空腔部5内射出的水的流量和壓力，據此 能始終反復進行穩定的操作。 如第5圖所示，透過上述水的射出，能進一步擴大中 空部分31，剩餘材料流入剩餘材料室6。此外，直到中空 部分31在空腔部5内完全形成為止，一直用水壓進行壓力 保持。 此外，若在上述成形控制器21中設置未圖示的水用 加熱裝置（加熱器）和冷卻裝置（熱交換器），形成能進行射 出水的溫度控制的結構，則能緩和中空品30的内表面的急 速冷卻，針對熱塑性樹脂的每個特性發揮最佳的效果，而 能實現各個中空品30的内表面的高品質。 (4) 水的排出工序 接著，如第6圖所示，打開上述氣體/水排出閥14， 停止來自氣體/水射出單元Π的水的供給，然後，按從上 12 321580 201024067 ' 述空腔部5内的中空部分31經由氣體/水射出單元11、氣 體/水流路12、氣體/水排出閥14的流路排出水。 此時，如第6圖、第7圖所示，被水壓塵縮而被封閉 在剩餘材料室6内的被壓縮的氣體的斥力使中空部分31 内的水向成形機本體2的外部排出。此時，由於配置於所 注入的水的前端的氣體使得水的前進路線不會被急速冷 卻，因此能發揮使中空部分31的内表面粗糙度變得極為圓 滑的效果。 ® (5)透過壓縮空氣進行水的排出工序 接著，如第8圖所示，作為成形的最後階段，打開上 述壓縮空氣射出閥10，將壓縮空氣向剩餘材料室6、空腔 部5内的中空部分31射出，從而使内部滯留的水分向成形 機本體2的外部排出。 據此，排出中空部分31的殘留水分時，被成形的中 空品30的餘熱被高效率地冷卻，能實現成形周期的縮短。 Q (6)之後，透過打開上述第一成形模具3、第二成形模 具4，能得到截面形狀如第9圖所示的内部具有中空部分 31的產品、之由熱塑性樹脂製成的中空品30。 對本實施例的成形裝置1和成形方法中採用的上述氣 體和水進行考察後得知，氣體隨著壓力的變化體積會自由 地變化。因此，雖能得到與被成形的材料的熔融狀態對應 的行為，但控制為固定的流量和壓力很困難。 另一方面，由於水的體積不受壓力影響始終保持恒定 的狀態，因此能可靠地進行壓力和流量的控制。 13 321580 201024067 透過將上述的氣體擁有的難點用水的特徵來彌補，即 透過有效利用氣體和水的特徵，能實現本實施例的中空品 30的成形裝置1和中空品30的成形方法。 此外，與水接觸的上述中空部分的壁面被急速冷卻而 形成表皮層。水一邊破壞上述表皮層一邊連續地反復形成 和破壞表皮層，其結果是，上述中空部分31的壁面的粗糙 度變得不均勻而形成粗糙表面。 本實施例的成形裝置1和成形方法的情況是兼用氣體 和水，在成形時最初向上述空腔部5注入空氣，接著射出 〇 水，因此，在空腔部5内氣體首先形成中空部分31，緩和 表皮層的形成，起到使中空部分31的壁面變得均勻且平滑 的效果。 此外，由於氣體與水相比冷卻效率低，因此還具有接 觸表面的固化進行延遲而不容易形成表皮層的優點。 根據以上說明的本實施例的成形裝置1，包括：成形 機本體2,該成形機本體2由第一成形模具3、第二成形模 @ 具4組成，具有用於有效利用氣體和水各自的特徵的被塞 子8隔開的中空的空腔部5和剩餘材料室6 ;材料注入口 9，該材料注入口 9向空腔部5内注入熱塑性樹脂材料；壓 縮空氣射出閥10，該壓縮空氣射出閥10排出内部的殘留 水；設於第二成形模具4的氣體/水射出單元11、氣體/水 流路12、氣體/水射出閥13 ;氣體/水排出閥14，該氣體/ 水排出閥14打開或關閉氣體/水流路12的另一端侧，而 且，還包括向成形機本體2供給來自成形控制器21的氣 14 321580 201024067 • 體、水的氣體/水射出單元11，根據上述結構，巧妙利用 氣體和水的特徵，實現中空品30的中空部分31的壁面均First, as shown in Fig. 2, the first molding die 3 and the second molding die 4 of the molding machine main body 2 are brought into a joined state (closed state), and the plug 8 is cut through the plug 8 to be cut into the remaining material chamber 6 by the plug. The intensive state is filled from the material injection port 9 into the cavity portion 5 of the molding machine body 2 into a material composed of a thermoplastic resin. V ❹ At this time, the filling condition is set to the flow rate and pressure at which the shape of the molded article shape portion 7 on the surface of the cavity portion 5 can be sufficiently replicated. Further, the horse prevents the material from leaking after the filling material, and opens the gas/water discharge valve 14 to supply the gas from the forming controller Η to the gas U and to make it in the gas/water flow path 12: gas/water discharge valve 14 Circulation inside. ❹ (2) The fluorocarbon injection process is as shown in Fig. 3, and the material is filled and opened to the upper post 8 , _ the upper order, and the ° 彳 (4) is maintained, and the above-mentioned forming control is 21 via the body/water row (four) 14 Then, from the road 12, the gas/k^ mountain/water injection unit 11, the gas/water flow gas, and the insect valve 13 is injected into the cavity portion 5 with an appropriate amount of predetermined pressure 1 and is broken. A hollow portion 31 is formed in the material. Instead of using __, test 4 = the material of the hollow product 30, the pressure of the water is reduced and the temperature is twice; the second gas is the material of the coke that will be immediately followed by the shot, and the middle six. 30 ^ If, on the right, the temperature rises, it will burn, nitrogen, etc., to prevent the inner surface of the hollow product 30 321580 201024067 from being burnt. The remaining material corresponding to the hollow portion 31 is urged and flowed toward the remaining material chamber as shown in Fig. 3 by the action of the gas pressure of the gas injected into the cavity portion 5. (3) Water Injection Step Next, as shown in Fig. 4, after the gas filling step is completed, the molding controller 21 starts the gas/water emitting unit 11, the gas/water flow path 12, and the gas/water injection valve 13 Water of a predetermined pressure is emitted to the cavity portion 5 to form the hollow portion 31. At this time, the operator operates the operation/control panel 22 to control the flow rate and pressure of the water that is ejected into the cavity portion 5, whereby the stable operation can be repeated at all times. As shown in Fig. 5, the hollow portion 31 can be further enlarged by the above-described injection of water, and the remaining material flows into the remaining material chamber 6. Further, until the hollow portion 31 is completely formed in the cavity portion 5, the pressure is maintained by the water pressure. In addition, when the water heater (heater) and the cooling device (heat exchanger) (not shown) are provided in the forming controller 21, and the temperature control of the injection water can be performed, the hollow product 30 can be alleviated. The rapid cooling of the inner surface exerts an optimum effect for each characteristic of the thermoplastic resin, and high quality of the inner surface of each hollow product 30 can be achieved. (4) Water discharge step Next, as shown in Fig. 6, the gas/water discharge valve 14 is opened to stop the supply of water from the gas/water injection unit ,, and then, from the above 12 321580 201024067 The hollow portion 31 in the portion 5 discharges water through the flow paths of the gas/water injection unit 11, the gas/water flow path 12, and the gas/water discharge valve 14. At this time, as shown in Figs. 6 and 7, the repulsive force of the compressed gas sealed by the water pressure and dust in the remaining material chamber 6 causes the water in the hollow portion 31 to be discharged to the outside of the molding machine body 2. . At this time, since the gas disposed at the tip end of the injected water causes the water traveling path to be not rapidly cooled, the effect of making the inner surface roughness of the hollow portion 31 extremely smooth can be exhibited. (5) Water discharging process by compressed air Next, as shown in Fig. 8, the compressed air injection valve 10 is opened as a final stage of molding, and compressed air is introduced into the remaining material chamber 6 and the cavity portion 5. The hollow portion 31 is emitted to discharge the moisture retained inside to the outside of the molding machine body 2. As a result, when the residual moisture of the hollow portion 31 is discharged, the residual heat of the formed hollow product 30 is efficiently cooled, and the molding cycle can be shortened. After Q (6), by opening the first molding die 3 and the second molding die 4, a product having a hollow portion 31 having a cross-sectional shape as shown in Fig. 9 and a hollow product 30 made of a thermoplastic resin can be obtained. . When the gas and water used in the forming apparatus 1 and the forming method of the present embodiment were examined, it was found that the volume of the gas was freely changed with the change of pressure. Therefore, although the behavior corresponding to the molten state of the material to be formed can be obtained, it is difficult to control the fixed flow rate and pressure. On the other hand, since the volume of water is always kept constant regardless of the pressure, the pressure and flow rate can be reliably controlled. 13 321 580 201024067 The molding apparatus 1 and the method of molding the hollow product 30 of the hollow product 30 of the present embodiment can be realized by utilizing the characteristics of the difficult water used in the gas described above, that is, by utilizing the characteristics of the gas and water. Further, the wall surface of the above hollow portion which is in contact with water is rapidly cooled to form a skin layer. The water continuously forms and destroys the skin layer while breaking the skin layer. As a result, the roughness of the wall surface of the hollow portion 31 becomes uneven to form a rough surface. In the case of the molding apparatus 1 and the molding method of the present embodiment, gas and water are used in combination, and air is initially injected into the cavity portion 5 at the time of molding, and then water is sprayed. Therefore, the gas first forms a hollow portion 31 in the cavity portion 5. The formation of the skin layer is alleviated, and the wall surface of the hollow portion 31 is made uniform and smooth. Further, since the gas has a low cooling efficiency as compared with water, there is also an advantage that the curing of the contact surface is delayed without easily forming the skin layer. The forming apparatus 1 according to the present embodiment described above includes: a molding machine body 2 composed of a first forming die 3 and a second forming die 4 having effective use of gas and water, respectively. a hollow cavity portion 5 and a remaining material chamber 6 separated by a plug 8; a material injection port 9 which injects a thermoplastic resin material into the cavity portion 5; a compressed air injection valve 10, the compressed air The injection valve 10 discharges residual water inside; the gas/water injection unit 11 provided in the second molding die 4, the gas/water flow path 12, the gas/water injection valve 13; the gas/water discharge valve 14, the gas/water discharge valve 14 is to open or close the other end side of the gas/water flow path 12, and further includes supplying the gas 14 321580 201024067 from the forming controller 21 to the molding machine body 2, the gas/water injection unit 11 of the body, water, according to the above structure, Ingeniously utilizing the characteristics of gas and water, the wall surface of the hollow portion 31 of the hollow product 30 is realized.
JT 勻化和成形周期的縮短化，並能成形、實現品質良好的由 熱塑性樹脂製成的中空品30。 此外，根據本實施例的成形方法，透過將已述的材料 的填充工序、氣體的注入工序、水的射出工序、水的排出 工序和用壓縮空氣進行的水的排出工序按順序實行，在成 形時巧妙利用氣體和水的特徵，實現中空品30的中空部分 ❿ 31的壁面均勻化和成形周期的縮短化，能成形、實現品質 良好的中空品30。 另外，本實施例的成形裝置1中，所述空腔部5和所 述剩餘材料室6為縱向配置，但也可將空腔部5和剩餘材 料室6橫向配置進行實施。 (產業上的可利用性） 本發明能廣泛應用於熱塑性樹脂制的筒體、管體、中 ❹空部件的成形。 【圖式簡單說明】 第1圖是表示本發明實施例的成形裝置的整，體的概略 結構圖。 第2圖是表示本實施例的成形裝置的中空品成形工序 中的材料的填充工序的概略剖視圖。The JT is homogenized and the molding cycle is shortened, and the hollow product 30 made of a thermoplastic resin having good quality can be formed and formed. Further, according to the molding method of the present embodiment, the filling step of the material, the gas injecting step, the water discharging step, the water discharging step, and the water discharging step using compressed air are sequentially performed in the forming method. When the characteristics of the gas and the water are utilized, the wall surface of the hollow portion 30 of the hollow product 30 is made uniform and the molding cycle is shortened, and the hollow product 30 having good quality can be formed. Further, in the molding apparatus 1 of the present embodiment, the cavity portion 5 and the remaining material chamber 6 are arranged in the longitudinal direction, but the cavity portion 5 and the remaining material chamber 6 may be disposed laterally. (Industrial Applicability) The present invention can be widely applied to the molding of a tubular body made of a thermoplastic resin, a pipe body, and a hollow member. BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a schematic view showing the entire structure of a molding apparatus according to an embodiment of the present invention. Fig. 2 is a schematic cross-sectional view showing a step of filling a material in a hollow product forming step of the molding apparatus of the present embodiment.
第3圖是表示本實施例的成形裝置的中空品成形工序 中的氣體的注入工序的概略剖視圖。 M 第4圖是表示本實施例的成形裝置的中空品成形工序 15 321580 201024067 中的水的射出工序的概略剖視圖。· 中的本實施例的成形裝置的中空品成形工序 二料卫序的持續㈣的概略剖視圖。 中的水的排h相概略職圖。”一絲工序 中的表:本實施例的成形裝置的中空品成形工序 工序的持續狀態的概略剖視圖。 圖是表示本實施例的成形裝置的中空品成^广 =空氣進行的水的排出工序的概略剖視圖 ==是能透過本實施㈣成形裝置 的中空品的概略剖視圖。 忐侍到 【主要元件符號說明】 1 成形裝置 2 3 第—成形模具 4 5 空腔部 5a 6 剩餘材料室 7 8 塞子 9 10 壓細空氧射出閥（valve) 11 氣體/水射出單元 12 氣體/水流路 13 14 氣體/水排出閥 21 22 操作/控制盤 30 31 中空部分 成形機本體 第二成形模具 材料導入空間部 成形品形狀部 材料注入〇 氣體/水射出閥 成形控制器 中空品 321580 16Fig. 3 is a schematic cross-sectional view showing a gas injection step in the hollow product forming step of the molding apparatus of the present embodiment. M Fig. 4 is a schematic cross-sectional view showing a water discharge step in the hollow product forming step 15 321580 201024067 of the molding apparatus of the present embodiment. The hollow product forming process of the molding apparatus of the present embodiment is a schematic cross-sectional view of the continuation (four) of the second processing. In the middle of the water, the h phase is a rough job picture. The table in the one-step process: a schematic cross-sectional view of the continuous state of the hollow product forming process of the molding apparatus of the present embodiment. The figure shows the hollow product of the molding apparatus of the present embodiment. BRIEF DESCRIPTION OF THE DRAWINGS == is a schematic cross-sectional view of a hollow product which can pass through the molding apparatus of the present embodiment (4). 忐 到 [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ [ 9 10 Pressure air oxygen injection valve 11 Gas/water injection unit 12 Gas/water flow path 13 14 Gas/water discharge valve 21 22 Operation/control panel 30 31 Hollow part molding machine body Second forming mold material introduction space Molded part shape part material injection helium gas / water injection valve forming controller hollow product 321580 16