^03025 經濟部中央標準局貝工消費合作社印製 A6 ___B_6__ 五、發明説明（1 ) <概要> 本發明及以於第一成形機構，一面使一體成形之合成 樹脂製注射筒間歇移動，一面將其下端部加熱，將針狀部 形成一定長度之延伸狀態後，搬送至第二成形機構；而在 該第二成形機構，亦一面使前述注射筒間歇移動，一面將 其針狀部加熱，並折曲成設定角度，同時切斷成設定尺寸 ，以成形注射筒等為構成者。 <發明之背景> 本發明乃關於使用在齒科治療等之先端部之針狀部分 為曲折之注射筒，其針狀部分之成形裝置及方法者。 在使用於齒科治療等之注射筒，有先端部之針狀部分 為曲折之注射筒。以往，此種注射筒乃使用在玻璃製之筒 先端裝接有先端為曲折之金屬製之針者；但此種注射筒由 於乃為使用後洗淨可再反覆使用者，故在衛生上不甚理想 。近年來，有鑑於此點，乃出現使用後可丢棄之廉價之合 成樹脂製之注射筒。 其典型者乃為日本特公昭53 — 2 1 234號專利公 報所刊載之發明。此乃為將合成樹脂製之筒體，及同樣為 合成樹脂製之細管部，以另體成形後將兩者加以組裝，一 面將細管部加熱，一面使其尖鋭成針狀者。 惟在上述以往之技術，因必需將筒體與細管部以另體 成形後再將兩者加以組裝，故成形費時甚久，在生産上尚 有問題。而且，將細管部加熱成形為推拔狀，需要不少手 今· 閲 背 面 之 注 意 事 項 再 填 寫 本 頁 •裝 訂 線 本紙張尺度逍用中Η Η家標準(CNS)甲4規格（210x297公*) 一 3 - 81. 5. 20,000(H) 經濟部中央標準局貝工消費合作社印製 5^03025 A6 ____B_6_ 五、發明説明（2 ) 工作燊，故亦需長年之熟練技術及許多時間，生産性欠佳 。並且，亦容易發生成形誤差。 此種注射筒因可在使用後丢棄故需要能大量生産、且 廉價等條件；但以往之成形方法所成形之製品，因生産惟 欠佳故必然地將超於高價。 <發明之目的> 本發明乃有鑑於此點所提案者；其目的乃在提供：可 將針狀部分為曲折狀之合成樹脂製注射筒，以大量且無成 形誤差之狀態下來成形之裝置及方法者。 <附圖之簡單說明> 第1圖乃表示本發明之一實施例之概略平面圖，第2 圖乃表示注射筒與第一保持具之組裝狀態之斷面圖，第3 圖乃表示注射筒由第一加熱裝置加熱之狀態之側面圖，第 4圖乃表示由押上裝置被押入之狀態之側面圖，第5圖乃 由光電管及第二旋轉裝置來定位，由第一切斷裝置來切斷 之狀態之側面圖，第6圔乃表示與第二保持具組裝之側面 圖，第7圖乃表示由第二加熱裝置加熱之狀態之側面圖， 第8圖乃表示由折曲裝置來折曲之狀態之側面圖，第9圖 乃表示由第二切斷裝置來切斷之狀態之側面圖，第1〇圖 乃表示由光電管由檢査折曲角度之狀態之正面圖，第1 1 圖乃表示由光電管來測定先端部外徑之狀態之側面圖。 本紙張尺度逍用中國國家«準(CNS)甲4規格(210x297公龙) 81. 5. 20,000(H) (請先•閱讀背面之注意事項再填寫本頁) 裝- ,03025 A 6 B6 經濟部中央標準局员工消費合作社印製 五、發明説明（3 ) <發昀之說明> 本發明之裝置，乃由第一成形機構1及第二成形機構 2等所構成。 第一成形機構1乃至少將被一髏成形之合成樹脂注射 筒S之下端加以加熱延伸至一定長度，以形成針狀部N者 。而且，第二成形機構2則至少將從第一成形機構1被搬 送之注射筒S之針狀部N加以再加熱以折曲成設定角度， 同時切斷成設定尺寸者。 可將本發明之第一成形機構1 ,由第1機台3、第一 保持具4、第一加熱裝置5、第一旋轉裝置6、延伸裝置 7、定位裝置8以及第一切斷裝置9等所構成。 在此情況下之第一機台3,乃為在順次被形成之第一 搬入部1〇、第一加熱部1 1、延伸部12、定位部13 、第一切斷部14及第一搬出部15暫時停止，而形成間 歇旋轉之圓板狀。第一保持具4乃在第一機台3周端部以 等間隔被設置，而將被搬送而至之注射筒S以正豎立姿勢 來保持者。第一加熱裝置5則為對注射筒S下端部加熱， 而被設置在前述加熱部。第一旋轉裝置6乃使位置於加熱 部之第一保持具4旋轉者。延伸裝置7乃為將注射筒S下 端部加以延伸以形成針狀部N,而被設在延伸部1 2。定 位裝置8則為將注射筒S定位於一定方向，而被設在定位 部1 3。然後，切斷裝置亦為將經延伸之注射筒針狀部N 切斷成一定長度，而位置於切斷部。 並且，第二成形機構2則宜由第二機台16、第二保 (請先•閲讀背面之注意事項再填寫本頁) 裝. •ST- 線. 本紙張尺度遑用中a B家標毕(CNS)甲4規格(210x297公*) 81. 5. 20.000(H) ~ 5 - 203025 A 6 B6 經濟部中央標準局貝工消費合作社印製 五、發明説明（4 ) 持具ί 7、第二加熱裝置18、折曲裝置19、第二切斷 裝置2 0、折曲檢査裝置21及外徑測定裝置2 2等所構 成。 在此情況下之第二機台16,亦為在順次被形成之第 二加熱部24、折曲部25、第二切斷部26、撿査部 27及第二搬出部28暫時停止，而形成間歇性旋轉之圓 板狀。第2保持具17亦在第二機台16周端部，以等間 隔被設置，而將被搬入之注射筒S,以其針狀部Ν向外方 之横轉姿勢加以保持者。第二加熱裝置1 8則為將注射筒 針狀部Ν加以再加熱，而位置於第二加熱部2 4。折曲裝 置1 9亦為將注射筒狀針部Ν折曲成設定角度，而被設在 折曲部25。第二切斷裝置20乃為將被折曲成設定角度 之注射筒針狀部Ν切斷成一定長度，而被設在第二切斷部 26。折曲檢査裝置2 1則為檢査注射筒針狀部Ν之折曲 角度，被設在檢査部27。然後，外徑測定裝置22亦為 撿査注射筒針狀部Ν之外徑，位置在檢査部27。 下面說明本發明之裝置之作用。首先，被搬入第一成 形機構1之第一搬入部1 0之合成樹脂製之注射筒S,乃 被第一保持具4保持在正豎立姿勢（參照第2圖）。其次 ,由於第一機台3之間歇性旋轉，此注射筒S乃到逹第一 加熱部1 1。在此第一加熱部1 1 ,注射筒S之下端部將 被第一加熱裝置5所加熱。位於此第一加熱部11之第一 保持具4乃由第一旋轉裝置6所旋轉，因此，注射筒S亦 同時旋轉；結果，注射筒S下端部乃被均勻加熱（第3圖 (請先閲讀背面之注意事項再填寫本頁) 裝· ·.·. 訂- 線- 衣紙張尺度边用中國Η家搮準(CNS)甲4規格(210x297公龙） 81. 5. 20,000(H) 6 A 6 B6 203025 五、發明説明（5 ) (請先閱讀背面之注意事項再填寫本頁) )。在第一加熱部1 1被加熱之注射筒S,接著乃到達延 伸部12 ;在此乃由延伸裝置7,其下端部將被拉引，而 延伸至一定長度。由於此延伸，在下端部乃形成針狀部N 。因下端部事先已被加熱，故由延伸裝置7之拉引，其加 熱部分將容易被延伸（第4, 5圖）。下端部經延伸而已 形成針狀部N之注射筒S,乃到達下一工程之定位部13 ，在此被定位在一定方向之方向；接著在第一切斷部14 ,針狀部N將被切斷成一定長度（第5圖）。然後，被搬 送到第一搬出部15後，乃被搬出。 線· 經濟部中央標準局员工消費合作社印製 從第一成形機構1被搬出之合成樹脂製注射筒S,乃 由第二蓮送機3 ◦被搬送，而到達第二成形機構2。在此 ，注射筒S乃被搬入第二搬入部23,並由第二保持具 1 7以針狀部N向外方之横轉姿勢被保持（第6圔）。接 著，由於第二機台16之間歇性旋轉，注射筒S乃到達第 二加熱部24;在此，針狀部N乃被第二加熱裝置18所 加熱（第7圖）^接著，注射筒S乃被送至折曲部25, 並由折曲裝置19,針狀部N將被折曲成設定角度。此時 之折曲工程亦因被折曲之部分事先已被加熱，故可極容易 達成（第8圖）。被折曲成設定角度之注射筒針狀部N, 乃在第二切斷部2 6被第二切斷裝置2 0切斷成設定長度 (第9圖）。此外，亦可將此折曲部25及第二切斷部 26設定在同一部位，來同時進行注射筒針狀部N之折曲 及切斷工程。完成針狀部N之折曲及切斷工程之注射筒S 乃被送至檢査部2 7，在此進行折曲檢査裝置2 1所作之 本紙張尺度逍用中國Η家標毕（CNS)甲4規格（210x297公龙) -7 - 81. 5. 20,000(H) 203025 A 6 B6 經濟部中央標準局员工消費合作社印製 五、發明説明（6 ) 針狀部N之折曲角度檢査（第1 〇圖），以及外徑測定裝 置22所作之外徑之測定檢査（第1 1圖）。然後，通過 檢査部27之注射筒S,乃由第二搬出部28被搬出及被 搬送。 <本發明之實施例> 第1至第1 1圖乃表示本發明之裝置之一實施例者。 在第一成形機構1之第一搬入部10,乃連接有第一 蓮送機29;由此第一蓮送機29將合成樹脂製注射筒S ，以正豎立姿勢加以搬送。由第一蓮送機2 9所搬送而至 之注射筒S,乃由被設在第一搬入部10近旁之第一搬入 裝置32來搬送，並在第一搬入部10之第一保持具4被 保持成維持正豎立姿勢之狀態（參照第2圖）。此注射筒 S乃為合成樹脂製，並由射出成形工程完成筒部與細管之 一體成形者。 在本實施例中，第一加熱部11乃連缠被設在八個部 位，在各第一加熱部1 1亦各設有第一加熱裝置5。並且 ，位置於此等第一加熱部11之第一保持具4,其鍵輪 48乃由第一旋旋轉裝置6之鍵條被連結而旋轉者。由此 ，注射筒S之下端部將被均勻加熱。第一加熱裝置5乃由 噴嘴35供給熱風者，由此熱風使注射筒S下端被加熱。 此外，為防止此熱風作用於注射筒S上部，亦設有遮蔽板 3 6 (第3圖）。 延伸裝置7乃由其夾子3 8挾持較注射筒S加熱部分 (請先閱讀背面之注意事項再填寫本頁) 裝· 線· 本紙張尺度逍用中國B家«準(CNS)甲4規格(210x297公*) -8 - 81. 5 . 20,000〇〇 A 6 B6 203025 五、發明説明（7 ) (請先閲讀背面之注意事項再填寫本頁) 為下位部分使其下降，由此使加熱部分延伸者（第4圖） 。延伸裝置7之下降變位量乃被保持一定，因此，因延伸而 形成之針狀部N之形狀（外觀、内徑、外徑等）亦將被保 持一定。 此外，在本實施例中，於延伸注射筒S下端之即前， 乃由押上裝置3 7將注射筒S下端押上至一定高度者（第 4圖）。此乃對注射筒S下端加熱後，其被加熱部分將溶 融，注射筒S下端部將因其自重及膨脹作用下垂，使延伸 前之各注射筒S之長度容易成為不均勻之故。將長度不均 勻之注射筒S維持其狀態直接加以延伸，則最終之延伸量 將各異，延伸後之針狀部N之形狀亦將出現差異。 Γ 經濟部中央標準局员工消費合作社印製 在本實施例中，下端部經延伸之針狀部N已形成之注 射筒S,乃由光電管39來將其沿著周方向定位在一定方 向。此沿著周方向定位工程乃由將注射筒S以第二旋轉裝 置4 1加以旋轉，藉對刻設於注射筒S外周面之刻度以一 定中心角度突設在注射筒S上端部之突起40遮斷光電管 39之光線之時點，將注射筒S之旋轉加以停止，來達成 (第5圖）。注射筒S之定位乃為將刻設於注射筒S之刻 度與注射筒針狀部N之彎曲方向，保持於一定位置關像所 必需者。 定位工程完成後之注射筒針狀部N,乃在同一部位， 由第一切斷裝置9所切斷。此切斷工程乃由第一切斷裝置 9之剪刀部42所達成（第5圖）。藉該第一切斷裝置9 之切斷傣切除因延伸成形在針狀部N之前端附帶作為剩餘 本紙張尺度逍用中國國家標準(CNS)甲4規格（210x297公泄) -9 - 81. 5. 20.000(H) 203025 A 6 B6 經濟部中央標準局負工消費合作社印製 五、發明説明（8 ) 部分為目的者，該狀態之針/(；(部N之長度係形成大於目的 之長度的數值。 完成切斷工程之注射筒S乃以維持正豎立姿勢之狀態 ，由第一搬出裝置48搬出至第二蓮送機30,以此第二 蓮送機3 ◦被搬送至第二成形機構2。此外，不良品則進 一步由間歇旋轉被搬送，從不良品排出部33,由不良品 搬出裝置47被排出至廢棄容器34内。 由第二蓮送機30被搬送之注射筒S,乃向第二成形 機構2之第二搬入部23,由第二搬入裝置50,以横轉 姿勢被搬入，並由第二保持具17所保持（第6圖）。此 注射筒S從正豎立姿勢至横轉姿勢之回轉，及從第二蓮送 機至第二保持具17之搬入，乃由第二搬入裝置50所達 成。 此第二成形機構2乃具有兩個連缠之第二加熱部24 ,各第二加熱部24亦各設有第二加熱裝置1 8。此第二 加熱裝置18,亦與第一加熱裝置同樣，乃為從噴嘴35 排出熱風來對注射筒針狀部N進行再加熱者（第7圖）。 被再加熱之注射筒針狀部N,亦由折曲裝置19之押壓模 43及支持模44折曲成設定角度（第8圖）。完成折曲 工程之注射筒針狀部N,乃由第二切斷裝置20之上刀刃 45及下刀刃46,被切斷成設定長度（第9圔）。此外 ,在本實施例中，乃將折曲部25及第二切斷部26設在 不同之間歇旋轉位置；但亦可設在同一位置，於折曲工程 完成之同時來切斷下端。 (請先閲讀背面之注意事項再填寫本頁) 裝- ·. ·訂 _ 本紙張尺度逍用中a a家樣準(CNS)甲4規格(210x297公;¢) -10 - 81. 5. 20.000(H) A6 B6 203025 五、發明説明（g ) (請先ra·讀背面之注意事項再填寫本頁) 在圖式實施例時，注射筒S為融點153t!左右，軟 化點1351C左右之聚丙烯樹脂所製成，而所加熱之注射 筒S之下端部之外徑為4. 3mm左右時，由於第一加熱 部1 1之站數多於第二加熱部24之站數，因此，在第一 加熱裝置5及第二加熱裝置18之熱風溫度最好共通於 2 〇0°C左右，又，注射筒S下端部之加熱部分之延伸置 ，傈設成所成形之針狀部N前端之外徑成為0. 6〜 0. 7mm,而針狀部N之折曲角度傜基於實用上之要求 設成7 0 °。 又，由於注射筒針狀部N之基端部，僳藉第二加熱裝 置18加熱在聚丙烯樹脂之軟化點以上，成為極易變形之 狀態，因此折曲裝置19僳幾乎不必要在該針狀部N作用 作為折曲力的成形力，而在押壓模43與支持模44之間 輕輕地挾持針狀部N,使針狀部N之折曲形態僅沿著支持 模44之模面成為一定者，藉此，達成針狀部N之一定角 度及折曲型態的折曲成形。 經濟部中央標準局员工消費合作社印製 檢査注射筒針狀部N之折曲角度之折曲角度之折曲檢 査裝置21,則由複數之光電管39所發出之光線射至折 曲部分之複數値部位來達成（第1 〇圖）。並且，测定注 射筒針狀部N之外徑之外徑測定裝置2 2,亦從光電管 39發出光線至針狀部N來進行（第1 1圖）。 由折曲測定裝置2 1及外徑測定裝置2 2被認定為良 品之注射筒S,乃從横轉姿勢被回復至正豎立姿勢，並由 第二搬出裝置49被送至第三蓮送機31,由此第三運送 81. 5. 20.000(H) 本紙張尺度逍用中B B家標準(CNS) 規格(210乂297公藿) 203025 五、發明説明（10) 機3 i被搬出。並且，被認定為不良品之注射筒S，則被 收容在廢棄容器34内。 因此，依據本發明之裝置，將可使一體成形之合成樹 脂製注射筒之針狀部，自動而大量且正確被成形完成；可 廉價供給用完即丢棄為可能之注射筒，可對更為衛生之齒 科治療等提供極大之貢獻。 (請先閱讀背面之注意事項再填寫本頁) 丁 經濟部中央標準局员工消費合作社印製 本紙张尺度通用中a B家樣华(CNS)甲4規格（210x297公货) -12 - 81. 5. 20,000(H)^ 03025 A6 printed by Beigong Consumer Cooperative of Central Bureau of Standards, Ministry of Economic Affairs 5. Description of the invention (1) < Summary > The present invention and the first molding mechanism intermittently move the integrated synthetic resin injection cylinder, While heating the lower end of the needle to form a certain length of the extended state, it is transported to the second forming mechanism; and in the second forming mechanism, the needle is also moved intermittently while heating the needle , And flexed to a set angle, and cut to a set size at the same time, with a shaped syringe as a constituent. < Background of the invention > The present invention relates to a device and method for forming a needle-shaped portion of a syringe in which the needle-shaped portion used at the tip of a dental treatment is a tortuous syringe. In the syringes used in dental treatment, etc., the needle-shaped portion at the tip is a tortuous syringe. In the past, this type of syringe was used when a metal needle with a twisted tip was attached to the tip of the glass cylinder; however, this type of syringe was washed after use and could be repeatedly used by the user, so it was not hygienic. Very ideal. In recent years, in view of this, there have been inexpensive synthetic resin syringes that can be discarded after use. The typical one is the invention published in Japanese Patent Publication No. 53-2 1 234. This is a tube made of synthetic resin and a thin tube part made of synthetic resin, which are assembled in a separate body, and the thin tube part is heated to make it into a needle shape. However, in the above-mentioned conventional technology, since it is necessary to form the cylinder body and the thin tube part separately and then assemble the two, the forming takes a long time, and there are still problems in production. Moreover, it takes a lot of hands to heat-mold the thin tube into a push-out shape. Read the precautions on the back and fill in this page again. • Binding line paper size is used in the middle of the house standard (CNS) A 4 specifications (210x297 g ) 1 3-81. 5. 20,000 (H) Printed by the Beigong Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 5 ^ 03025 A6 ____B_6_ V. Description of invention (2) The work is not easy, so it also requires many years of skilled technology and much time to produce Sex is not good. Also, molding errors are prone to occur. This type of syringe can be discarded after use, so it needs to be mass-produced and cheap. However, the products formed by the previous molding methods will inevitably exceed the high price due to poor production. < Objective of the invention > The present invention is proposed in view of this point; the object of the present invention is to provide: a synthetic resin injection barrel having a zigzag needle-shaped portion, which can be molded in a large amount without forming errors Device and method. < Simple description of the drawings > Fig. 1 is a schematic plan view showing an embodiment of the present invention, Fig. 2 is a cross-sectional view showing an assembled state of a syringe and a first holder, and Fig. 3 is an injection Side view of the state in which the cylinder is heated by the first heating device, Figure 4 is a side view showing the state of being pushed in by the pressing device, and Figure 5 is positioned by the photocell and the second rotating device, and by the first cutting device Side view of the cut-off state, No. 6 is a side view showing the assembly with the second holder, Figure 7 is a side view showing the state of being heated by the second heating device, and Figure 8 is a view showing the bending device Side view of the bent state, Figure 9 is a side view showing the state of being cut by the second cutting device, Figure 10 is a front view showing the state of the bending angle checked by the photocell, the first 1 1 The figure is a side view showing the state where the outer diameter of the tip end is measured by the photocell. The size of this paper is free to use the Chinese National Standard (CNS) A4 (210x297 male dragon) 81. 5. 20,000 (H) (please read the precautions on the back and then fill out this page). Install-, 03025 A 6 B6 Economy Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry 5. Description of the invention (3) < Description of the haircut > The device of the present invention is composed of the first forming mechanism 1 and the second forming mechanism 2. The first forming mechanism 1 heats and extends at least the lower end of the synthetic resin injection cylinder S formed by a skull to a certain length to form the needle-shaped portion N. Moreover, the second forming mechanism 2 reheats at least the needle portion N of the syringe S transferred from the first forming mechanism 1 to be bent at a set angle and cut to a set size. The first forming mechanism 1 of the present invention can be composed of a first machine 3, a first holder 4, a first heating device 5, a first rotating device 6, an extension device 7, a positioning device 8, and a first cutting device 9 Etc. In this case, the first machine 3 is the first carrying-in part 10, the first heating part 11, the extending part 12, the positioning part 13, the first cutting part 14, and the first carrying-out which are sequentially formed The portion 15 is temporarily stopped, and is formed into a disc shape that rotates intermittently. The first holder 4 is provided at equal ends of the first machine 3 around the circumference, and the syringe S to be transported is held in the upright posture. The first heating device 5 heats the lower end portion of the syringe S, and is provided in the aforementioned heating portion. The first rotating device 6 rotates the first holder 4 positioned in the heating section. The extension device 7 is provided in the extension portion 12 to extend the lower end portion of the syringe S to form the needle portion N. The positioning device 8 is provided in the positioning portion 13 to position the syringe S in a certain direction. Then, the cutting device also cuts the needle portion N of the extended syringe into a certain length, and is positioned at the cutting portion. In addition, the second forming mechanism 2 should be installed by the second machine 16 and the second guarantee (please read the precautions on the back and then fill out this page). • ST-line. This paper standard is not in the B standard Bi (CNS) A 4 specifications (210x297 g *) 81. 5. 20.000 (H) ~ 5-203025 A 6 B6 Printed by the Beigong Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economy V. Description of invention (4) Holder 7. The second heating device 18, the bending device 19, the second cutting device 20, the bending inspection device 21, the outer diameter measuring device 22, and the like are configured. In this case, the second machine 16 also temporarily stops the second heating part 24, the bending part 25, the second cutting part 26, the inspection part 27, and the second unloading part 28 which are formed in sequence, and Form a disc shape that rotates intermittently. The second holder 17 is also provided at equal intervals at the peripheral end of the second machine 16, and the syringe S that is carried in is held in the laterally outward posture of the needle portion N. The second heating device 18 is for reheating the needle portion N of the syringe, and is located at the second heating portion 24. The bending device 19 is also provided in the bending portion 25 to bend the injection cylindrical needle portion N to a set angle. The second cutting device 20 is provided in the second cutting portion 26 to cut the needle portion N of the syringe bent at a predetermined angle into a certain length. The bending inspection device 21 is provided in the inspection unit 27 for inspecting the bending angle of the needle portion N of the syringe. Then, the outer diameter measuring device 22 is also located at the inspection portion 27 for checking the outer diameter of the needle portion N of the syringe. The function of the device of the present invention will be described below. First, the synthetic resin syringe S that is carried into the first carrying-in portion 10 of the first forming mechanism 1 is held in the upright posture by the first holder 4 (refer to FIG. 2). Secondly, due to the intermittent rotation of the first machine 3, the syringe S even reaches the first heating section 11. In this first heating part 1 1, the lower end of the syringe S will be heated by the first heating device 5. The first holder 4 located in the first heating section 11 is rotated by the first rotating device 6, so the syringe S also rotates at the same time; as a result, the lower end of the syringe S is heated uniformly (Figure 3 (please first Read the precautions on the back and then fill out this page) Binding · · · · · Order-Thread-Clothing paper size side use Chinese Η family 揮 准 (CNS) A 4 specifications (210x297 male dragon) 81. 5. 20,000 (H) 6 A 6 B6 203025 V. Description of the invention (5) (Please read the precautions on the back before filling this page)). The syringe S heated in the first heating portion 11 then reaches the extension portion 12; here is the extension device 7, whose lower end portion will be drawn to extend to a certain length. Due to this extension, a needle portion N is formed at the lower end. Since the lower end portion has been heated in advance, the heated portion of the stretching device 7 can be easily stretched by drawing (Fig. 4, 5). The syringe S, whose lower end has been extended to form the needle portion N, reaches the positioning portion 13 of the next project, where it is positioned in a certain direction; then at the first cutting portion 14, the needle portion N will be Cut to a certain length (Figure 5). Then, after being transported to the first unloading part 15, it is unloaded. Line · Printed by the employee consumer cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs. The synthetic resin syringe S that was removed from the first molding facility 1 was transported by the second lotus conveyor 3 and arrived at the second molding facility 2. Here, the syringe S is carried into the second carrying-in portion 23, and is held by the second holder 17 in the laterally-transverse posture of the needle-like portion N (sixth sire). Next, due to the intermittent rotation of the second machine 16, the syringe S reaches the second heating portion 24; here, the needle portion N is heated by the second heating device 18 (Figure 7) ^ Then, the syringe S is sent to the bending portion 25, and by the bending device 19, the needle portion N will be bent to a set angle. The bending process at this time is also easy to achieve because the bent part has been heated in advance (Figure 8). The needle portion N of the syringe, which is bent at a set angle, is cut to a set length by the second cutting device 20 at the second cutting section 26 (Figure 9). In addition, the bending portion 25 and the second cutting portion 26 can be set at the same location to perform the bending and cutting of the syringe needle portion N at the same time. The syringe S, which has completed the bending and cutting of the needle portion N, is sent to the inspection department 2 7 where the bending inspection device 2 1 is used to make the original paper standard and use the Chinese standard home (CNS) A 4 Specifications (210x297 male dragons) -7-81. 5. 20,000 (H) 203025 A 6 B6 Printed by the Employee Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of invention (6) Check the bending angle of the needle N 1 〇 Figure), and the outer diameter measurement device 22 by the outer diameter measurement inspection (Figure 11). Then, the syringe S passing through the inspection section 27 is carried out and conveyed by the second carrying out section 28. < Embodiment of the present invention > Figs. 1 to 11 show an embodiment of the apparatus of the present invention. At the first carrying-in portion 10 of the first forming mechanism 1, a first lotus feeder 29 is connected; thereby, the first lotus feeder 29 conveys the synthetic resin syringe S in an upright posture. The syringe S transported by the first lotus conveyor 29 is transported by the first loading device 32 provided near the first loading unit 10, and the first holder 4 of the first loading unit 10 It is maintained in a state where it is maintained in an upright posture (see Figure 2). The injection barrel S is made of synthetic resin, and the injection molding process completes the integral molding of the barrel and the thin tube. In this embodiment, the first heating sections 11 are arranged in eight positions in series, and each first heating section 11 is also provided with a first heating device 5. Also, the first holder 4 positioned at these first heating parts 11 has its key wheel 48 connected by the key bar of the first rotary device 6 to rotate. As a result, the lower end of the syringe S will be heated evenly. The first heating device 5 supplies hot air from the nozzle 35, whereby the lower end of the syringe S is heated by the hot air. In addition, in order to prevent this hot air from acting on the upper part of the syringe S, a shielding plate 36 (Figure 3) is also provided. The extension device 7 is held by the clip 3 8 to hold the heating part of the syringe S (please read the precautions on the back before filling in this page). Installation · Thread · This paper standard is used in China B home «quasi (CNS) A 4 specifications ( 210x297g *) -8-81. 5. 20,000 〇〇A 6 B6 203025 5. Description of the invention (7) (please read the precautions on the back before filling in this page) The lower part makes it lower, thereby making the heating part Extender (Figure 4). The amount of downward displacement of the extension device 7 is kept constant, so the shape (appearance, inner diameter, outer diameter, etc.) of the needle-shaped portion N formed by the extension will also be kept constant. In addition, in this embodiment, the lower end of the syringe S is pushed up to a certain height by the pressing device 37 just before the lower end of the extended syringe S (Figure 4). This is because after heating the lower end of the syringe S, the heated portion will melt, and the lower end of the syringe S will sag due to its own weight and expansion, so that the length of each syringe S before extension is likely to become uneven. If the syringe S with a non-uniform length is directly extended while maintaining its state, the final amount of extension will be different, and the shape of the needle portion N after the extension will also be different. Γ Printed by the Employee Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs In this embodiment, the injection tube S formed by the extended needle portion N at the lower end is positioned in a certain direction along the circumferential direction by the photoelectric cell 39. The positioning process along the circumferential direction is performed by rotating the syringe S with the second rotating device 41, and the projection 40 engraved on the outer peripheral surface of the syringe S protrudes from the protrusion 40 on the upper end of the syringe S at a certain central angle When the light of the photocell 39 is blocked, the rotation of the syringe S is stopped to achieve it (Figure 5). The positioning of the syringe S is necessary to keep the degree engraved on the syringe S and the bending direction of the needle portion N of the syringe at a certain position to close the image. After the positioning process is completed, the needle portion N of the syringe is at the same location and is cut by the first cutting device 9. This cutting operation is performed by the scissors portion 42 of the first cutting device 9 (Figure 5). With the first cutting device 9, the cutting Dai is cut out by extension forming at the front end of the needle-shaped portion N. It is attached as the remaining paper size. The Chinese National Standard (CNS) A 4 specifications (210x297 public) -9-81. 5. 20.000 (H) 203025 A 6 B6 Printed by the Ministry of Economic Affairs Central Standards Bureau Negative Workers Consumer Cooperative V. Description of Invention (8) For the purpose, the needle / (; (The length of the part N is greater than the purpose The value of the length. The syringe S completed the cutting process is maintained in the upright posture, and is carried out from the first unloading device 48 to the second lotus conveyor 30, whereby the second lotus conveyor 3 is transferred to the second Molding mechanism 2. In addition, the defective product is further transported by intermittent rotation, and is discharged into the waste container 34 from the defective product discharge unit 33 and the defective product discharge device 47. The syringe S transported by the second lotion conveyor 30 , Is to the second carrying-in portion 23 of the second forming mechanism 2, carried by the second carrying-in device 50 in a horizontal rotation posture, and held by the second holder 17 (Figure 6). Rotation from upright position to horizontal rotation position, and from the second lotus machine to the second holder 17 The carrying-in is achieved by the second carrying-in device 50. The second forming mechanism 2 has two entangled second heating parts 24, and each second heating part 24 is also provided with a second heating device 18. The second heating device 18 is also the same as the first heating device, is to discharge the hot air from the nozzle 35 to reheat the syringe needle N (Figure 7). The reheated syringe needle N is also folded by The pressing die 43 and the supporting die 44 of the bending device 19 are bent at a set angle (Figure 8). The needle portion N of the syringe that has completed the bending process is formed by the upper cutting edge 45 and the lower cutting edge 46 of the second cutting device 20 , Is cut to a set length (9th). In addition, in this embodiment, the bending portion 25 and the second cutting portion 26 are set at different intermittent rotation positions; but can also be set at the same position, Cut the lower end at the same time as the bending process is completed. (Please read the precautions on the back before filling in this page) 装-·· · 訂 _ This paper size is used in the aa family standard (CNS) A 4 specifications (210x297 Public; ¢) -10-81. 5. 20.000 (H) A6 B6 203025 5. Description of the invention (g) (Please read the notes on the back first and then fill in 3mm 约。 In the illustrated embodiment, the syringe S is made of polypropylene resin with a melting point of about 153t! And a softening point of about 1351C, and the outer diameter of the heated syringe S under the end is 4. 3mm or so At this time, since the number of stations of the first heating unit 11 is greater than the number of stations of the second heating unit 24, the temperature of the hot air in the first heating device 5 and the second heating device 18 is preferably about 200 ° C. , In addition, the heating portion of the lower end portion of the syringe S is extended, so that the outer diameter of the front end of the needle portion N formed is 0.6 to 0.7 mm, and the bending angle of the needle portion N is based on practical The above requirement is set to 70 °. In addition, since the base end of the needle-like portion N of the syringe is heated above the softening point of the polypropylene resin by the second heating device 18, it becomes extremely deformable, so the bending device 19 is almost unnecessary in the needle shape The portion N acts as a forming force for the bending force, and the needle portion N is gently nipped between the pressing die 43 and the support die 44 so that the bent form of the needle portion N only becomes along the die surface of the support die 44 Certainly, by this, a certain angle of the needle-shaped portion N and a bending shape of the bending pattern are achieved. The flexion inspection device 21 for inspecting the flexion angle of the needle portion N of the syringe is printed by the Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs. To achieve (Figure 10). In addition, the outer diameter measuring device 22 for measuring the outer diameter of the needle-like portion N of the injection tube also emits light from the photoelectric cell 39 to the needle-like portion N (Figure 11). The syringe S that was determined to be a good product by the bending measuring device 21 and the outer diameter measuring device 2 was restored from the horizontal rotation posture to the upright posture, and was sent to the third lotus feeder by the second unloading device 49 31. From this third delivery 81. 5. 20.000 (H) This paper standard is used in the BB standard (CNS) specifications (210 to 297 gong) 203025 V. Invention description (10) The machine 3 i is removed. In addition, the syringe S that is determined to be defective is stored in the waste container 34. Therefore, according to the device of the present invention, the needle-shaped portion of the synthetic resin injection barrel which is integrally formed can be automatically, mass-produced and correctly formed; the injection barrel which can be discarded as soon as possible after being used up can be inexpensively supplied, Provide great contributions to the dental treatment of health. (Please read the precautions on the back before filling out this page) Ding Deng, Ministry of Economy, Central Bureau of Standards, Employee Consumer Cooperative, this paper is printed in a universal format, a B home sample (CNS) A 4 specifications (210x297 public goods) -12-81. 5. 20,000 (H)