4 67 75 1 A7 B7 五、發明説明（,） 〔技術領域〕 本發明係關於一種注射器的製造方法。 (请先《讀背面之注意事項再填寫本頁) 〔技術背景〕 在以往，被當做用後即棄型注射器來使用，如第5翩 所示之合成樹脂製的注射器5 1係爲大眾所周知。上述注 射器51係由：具有可裝設注射針2之尖錐部3的合成樹 脂製外筒4、及在前端部具有緊貼著該外筒4之內壁4 a 滑動之墊圈5 2的合成樹脂製閥柱5。閥柱5係由聚丙烯 、聚苯乙烯、聚碳酸酯等所形成，並在其前端部形成具有 向外周側伸出之突出部5 3，且呈王冠狀的突起部5 4 * 上述墊圈5 2之形狀係相似於突起部5 4 *並被嵌著 在突起部5 4 ,且對應於突出部5 3之部份做爲滑動部 5 5而與外筒4之內壁4 a呈緊貼般，係由具有彈性之樹 脂所形成。當上述注射器_ 5 1吸入藥液時，注射器內部會 成爲負壓，墊圈5 2便有自閥柱5脫落之虞，但桌藉由將 墊圈5 2卡合在突出部5 3便可抵擋上述負壓而防止脫落 經濟部智慈財產局貝工消費合作杜印製 〇 雖然如此，但於第5圖所示之以往的注射器5 1正因 爲在突起部5 4設有可防止墊圈5 2脫落之構成，所以注 射器5 1便有全長過長之不便產生•此外*因爲上述以往 的注射器51係嵌著著由不同於閥柱5之突起部54之材 料所形成的墊圈5 2,所以墊圈5 2與閥柱5必須個別形 成*故在後工程時具有非得組合不可的不便性。 本紙張尺度逋用中國國家橾準（CNS ) A抽I格（210X297公釐） -4- 46775 1 A7 B7 _ 五、發明説明（2 ) 〔發明開示〕 (請先《讀背面之注意事項再填寫本霣) 本發明爲了解決上述之不便，即以提供一種對於閥柱 而言’不須卡合墊圈仍可接合之注射器的製造方法爲目的 〇 此外，本發明之另一目的爲：提供一種可縮短注射器 全長之注射器的製造方法· 爲了達成上述目的，本發明即爲一種注射器的製造方 法，該方法係針對具有裝設著注射針的外筒，及在前端部 接合著緊貼該外筒之內壁滑動的閥柱之熱可塑性樹脂製閥 柱的注射器。該墊圈或該閥柱之任一方的構件係裝設在鑄 模上，而形成另一方之構件的樹脂則在射出至該鑄模內時 ，該墊圈係由對於該閥柱可行熱熔接1之熱可塑性彈性體所 形成者，並且形成該他方之構件的樹脂的射出成形是在射 出成形機的缸溫度爲1 3_0〜3 0 0 °C的範圍，射出壓力 2 5 0〜1 500匕8/(：1113的範圍內施行。 經濟部智慧財4局R工消費合作社印製 根據本發明之製造方法，上述墊圈係接合在上述閥柱 的前端部，因此不須具有卡合於上述閥柱之前端部的構成 ，故可縮短注射器的全長。 此外，根據本發明之製造方法，上述閥柱係由熱可塑 性樹脂所成，且上述墊圈係由對於上述閥柱可行熱熔接之 熱可塑性彈性體所形成，所以藉由射出成形時之熱度及射 出壓，便可將二者予以接合。在上述製造方法中’如果缸 溫度不到130eC，或是射出壓力低於250fcg/cm3 -5- 本紙張尺度適用中國國家揉車（CNS > A4规格（210X297公釐） 6775 1 at B7 五、發明説明（3 ) 的話·則無法獲得充份的黏接強度*再者，如果缸溫度超 過300 °C，或是射出壓力超過1 500kg/cm3的話 ，則先被裝設在鑲模的構件會被之後射出成形之樹脂所損 傷。 另外，在本發明之製造方法中，在上述閥柱的前端部 係藉由該閥柱與上述墊圈的共通溶劑，將該墊圈予以溶接 ，或者是在該閥柱的前端部藉由黏接劑將該墊圈予以黏接 皆可。在上述製造方法中，藉由上述溶接或黏接皆可將上 述墊圈接合在上述閥柱的前端部。因此，不必像以往技術 般，要將上述墊圈嵌著於設置於上述閥柱前端的突起部， 故可更加簡單地製造上述注射器。 〔圖面之簡單說明〕 第1圖係顯示藉由本實施形態之製造方法所得之注射 器的一構成例的說明剖面阐。 第2圖係顯示本實施形態之注射器的製造方法之一例 的說明剖面圖。 第3圖係顯示藉由本實施形態之製造方法所得之注射 器的其他構成例的說明剖面圖。 第4圖係顯示將第3圖中所示之墊圈予以擴大的剖面 圖。 第5圖係顯示以往注射器之一構成例的說明剖面圖* 〔元件符號說明〕 (请先《讀背*之注$項再填寫本頁) k. 订. 卜 經濟部智慧財產局S工消费合作社印« 本紙張尺度適用中國國家棋準（CNS ) A4規格（210X297公羞） -6- 467751 五、發明説明（4 ) A7 B7 經濟部智恶財產局肖工消費合作钍印& 1 .注射器 2 注射針、 3 尖錐部 4 外筒 4a 內壁 5 閥柱 6 墊圈 7a ' 7b 板狀構件 8 圓板./ 9 凸緣 21a,21b 鑄模 22 模槽 23 尖端閥 24 射出成形機 25 過水部 26 熱可塑性彈性體 32 墊圈 33 台座 34 曲面 35 穴部 36 環狀溝部 37 彎曲部 51 注射器 52 墊圈 ------------ (請先W讀背面之注意事項再填寫本頁) 訂 -4- 本纸張尺度通用中國國家揉準（CNS ) A4規格（2丨0X297公釐） A7 B7 4 6 775 1 五、發明説明（ 5 ) 53 突出部 54 突起部 55 滑動部 〔發明之最佳實施形態〕 茲參照圖面詳細說明本發明之實施形態如下。 參照第1圇，藉由本實施形態之製造方法所製得之注 射器1係由具有裝設著注射針2之尖錐部3的合成樹脂製 外筒4，及合成樹脂製閥柱5所構成，並且在閥柱5的前 端部具有緊貼著外筒4之內壁4a滑動的墊圈6。 _ 閥柱5係由如聚苯、聚烯烴、聚酯、聚醯胺、聚 聚碳酸酯、烯-苯乙烯共聚物等的 合成樹脂所形成。閥柱5係由板狀構件7 a、7b組合成 十字狀，並在後端部具有可做爲置指部的圓板8，及在前 端部具有圓板狀的凸緣9/ 墊圈6係藉由朝側方突出之曲面部，而呈與外筒4之 內壁4 a緊密貼合之略圓盤狀體，並在該圓盤狀體底部的 平面上與圓板狀凸緣9之前端的平面相接合。墊圈6則可 使用如聚苯乙烯系彈性體、聚稀烴系彈性體、聚酯系彈性 體、聚醯胺系彈性體、聚氯化乙烯系彈性體等之熱可塑性 彈性體，或添加了聚苯乙烯之苯乙烯-丁二烯橡膠（ S B R )等所形成《 接下來，茲說明有關本實施形態之閥柱5與墊圈6的 製造方法。 本紙張尺度逋用中國國家樣率（CNS > A4*l格（210X297公羞） (請先《讀背面之注mi再f本頁) -訂. 經濟部智慧財4局B工消«-合作社印製 • 8 - 6 46775 ΐ at Β7 五、發明説明（ 在本實施形態的製造方法中，首先，根據習知之射出 成形法即可製造出上述之熱可塑性合成樹脂製的閥柱5。 而如第2圖（a )所示，上述閥柱5係裝設在鑄模2 1 a 、2 1 b。鑄模2 1 a、2 1 b除了具有同於閥柱5與墊 圈6之外形形狀的模槽2 2外，且具有位在形成於墊圈6 之表面中央部的尖端閥2 3。此外，鑲模2 1 b具有連接 尖端閥23與射出成形機24的過水部25 »再者，鏤模 2 1 a、2 1 b之模槽2 2係利用放電型切削加工所形成 ，其內面係由平均粒子徑30〜50;/ m的硏磨粒子所硏 磨而成。 再來，第2圖（b )係顯示裝設著閥柱5之鑄模2 1 a、21b的關閉狀態。且第2圖（c)則顯示將射出成 形機2 4連接在鑄模2 1 b的過水部2 5，且將對閥柱5 而言係爲可熱熔接之熱可塑性瘅性體2 6在溶融狀態下射 出至模槽22的狀態/ 上述熱可塑性彈性體2 6可使用包含與閥柱5之材料 爲同一樹脂之樹脂。例如/乂閥柱5的材料爲聚苯乙烯、聚 烯烴、聚酯、聚醯胺、之任一種時，則上述熱 可塑性彈性體2 6可選擇各述閥柱5之材料的聚 苯乙烯系彈性體、聚烯烴系彈性體、聚酯系彈性體、聚醯 胺系彈性體、聚氯化乙烯系彈性體* 此外，上述熱可塑性彈性髏2 6亦可爲含有對閥柱5 之材料而言具有可熱熔接之成分的樹脂，或爲添加了對閥 柱5之材料而言具有可熱熔接之成分的樹脂。 ---------C—— (請先Μ讀背面之注f項再填寫本頁) 订· r、 經濟部智¾財產局员工消#合作社印製 本纸張尺度遗用中國國家揉準（CNS ) Α4ΛΙ格（2i〇XW7公釐） -9- 46775 1 A7 __B7___ 五、發明説明（7 ) 而含有對閥柱5之材料而言具有可熱熔之成分的上述 熱可塑性彈性體，當閥柱5的材料爲聚烯烴時，則可使用 聚苯乙烯系彈性體•再者，當閥柱5的材料爲聚碳酸酯或 丙烯腈_丁二烯-苯乙烯共聚物時，則可使用聚_系彈性 體。 而添加了對閥柱5之材料而言具有可熱熔接之成分的 上述熱可塑性彈性體，當閥柱5的材料爲聚烯烴時•則可 使用添加了聚烯烴之聚苯乙烯系彈性體》此外，當閥柱5 之材料爲聚苯乙烯時，則可使用添加了聚苯乙烯之聚烯烴 系彈性體。 在本實施形態中，使用聚丙烯彤成閥柱5的同時，上 述熱可塑性彈性體2 6則可使用含有做爲硬鏈段之苯乙烯 ，與做爲軟鏈段之氫化聚異戊二烯的苯乙烯系彈性體（苯 乙烯一乙烯.丙烯一苯乙烯嵌段共聚物而做爲上述熱 可塑性彈性體2 6的苯乙烯一乙烯.丙烯_苯乙烯嵌段共 聚物係爲含有對於閥柱5的材料而言具有可熱熔接之成分 的樹脂》 上述苯乙烯-乙烯.丙烯一苯乙稀嵌段共聚物的射出 ，係以採用螺旋閥柱方式的一般通用機來做爲射出成形機 24，並在射出成形機之缸溫度在140〜270 °C，射 出壓力爲峰値壓2 5 0〜1 00 〇 kg/cm2的範圍內’且保 持該射出壓的5〜5 0%的屋力在1〜8秒間的情況下施 行。因此，上述苯乙烯-乙烯·丙烯一苯乙烯嵌段共聚物 製墊圈6便可熱熔接在聚丙烯製閥柱5上，而使閥柱5與 本紙張尺度適用中國國家揉率（CNS > A4洗格（210X297公羞> _ _ ---------1,/^— (請先K讀背面之注項再填寫本頁} 訂. 經濟部智*財1局員工消«-合作社印製 4 6775 1 A7 ___B7_ Γΐ、發明説明（8) 墊圈6形成爲一體· 在本實施形態中*是將已事先成形之閥柱5裝設在鋳 模2 1 a、2 1 b，但也可事先將已成形的墊圈6裝設在 鑄模2 1 a、2 1 b »先裝設在鑄模21a、 …的塾圈^曝 柱5的材料更加柔軟.， 所以可在缸溫度1 9 ，射出壓力2 5 0〜 6 0 0 kg /cm2的範圍，且保持該射出懕的5〜5 0%的壓 力在0.2〜8秒間的這種更穩定的情沅下射出閥柱5的 材料出來。 再者，爲了取代第2圖（a)至第2圖（c)所示之 裝置，還可使用反轉方式、模芯旋轉方式、模芯後退方式 、鑄模滑動方式等之雙色成形模具《順次射出閥柱5的材 料與墊圈6的材料。 在本實施形態之製造方法中*是利用射出成形時之加 熱、射出壓力來將閥柱與墊圈6熱熔接在一起，但也可 利用共通的溶劑或黏接劑，將各自成形的閥柱5與墊圈6 黏接在一起。 經濟部智恶財產局8工消費合泎社印製 I 丨 — II---^L-- (請先《讀背面之注意事項再填寫本I) -sir 當使用共通溶劑來溶接時，例如：利用聚苯乙烯之射 出成形所得的閥柱5，與利用拌合了 5〜3 5%之聚苯乙 烯的苯乙烯-丁二烯橡膠的熱硬化成形法所得之墊圈6， 藉由將該二者材料的共通溶劑二氯乙烷將一部份溶解後， 再將已被溶解的部份壓接而使其接合。 此外*藉由黏接劑來黏接時，例如：可用氰基丙烯酸 酯系黏接劑來黏接利用聚丙烯之射出成形所得的閥柱5， 本纸張尺度適用中國國家揉率（CNS > A4规格（210X297公釐） 11 · 467751 A7 B7_ 五、發明説明（9 ) 與利用拌合了 5〜3 5%之聚苯乙烯的苯乙烯一丁二烯橡 膠之熱硬化成形法得之墊圈6。 無論是用上述共通溶劑來溶接，或是用黏接劑來黏接 ，閥柱5的材料與墊圈6的材料的組合並不僅限於上述聚 丙烯與含有聚苯乙烯之苯乙烯-丁二烯橡膠，只要是藉由 黏接劑、有機溶劑等而對於閥柱5的材料可產生黏接性的 樹脂者亦可《例如：當閥柱5的材料爲聚苯乙烯時，形成 墊圈6的樹脂即可爲聚苯乙烯系彈性體、聚烯烴系彈性體 、添加了聚苯乙烯之苯乙烯-丁二烯橡膠等，而當閥柱5 的材料爲聚烯烴時，則形成墊圈6的樹脂可爲聚烯烴系彈 性體、聚苯乙烯系彈性體等。 上述共通溶劑不限於上述二氯乙烷，只要是可溶解上 述閥柱5的材料與墊圈6的材料的溶劑皆可。 上述黏接劑雖以對於不同材料之黏接具有優異黏接性 的氛基丙烯酸酯系黏接劑爲佳，但是，只要是可黏接閥柱 5的材料與墊圈6的材料的黏接劑者亦皆可。此外，在黏 接時，還可使用雷管，或對黏接面施以改質的前處理作業 〇 在利用本實施形態之製造方法所得之注射器1中，只 要藉由上述任一方法將墊圈6接合在閥柱5 *則拉引閥柱 使藥液注入外筒4內時，即使外筒4內呈負屋，墊圈6仍 不會自閥柱5剝離》 再者，利用本實施形態之製造方法，也可製造出具有 如第3圖所示之構成的注射器3 1。緊貼著該注射器3 1 {請先《讀背面之注意Ϋ項再填寫本頁)4 67 75 1 A7 B7 V. Description of the Invention (,) [Technical Field] The present invention relates to a method for manufacturing a syringe. (Please read the "Notes on the back side before filling out this page") [Technical background] In the past, it was used as a disposable syringe. The synthetic resin syringe 51 shown in Figure 5 is widely known. . The syringe 51 is composed of a synthetic resin outer cylinder 4 having a tapered portion 3 in which an injection needle 2 can be mounted, and a front end portion having a washer 5 2 which slides closely against the inner wall 4 a of the outer cylinder 4. Resin valve post 5. The valve stem 5 is formed of polypropylene, polystyrene, polycarbonate, or the like, and has a crown-shaped protrusion 5 4 having a protruding portion 5 3 protruding to the outer peripheral side at a front end portion thereof. The shape of 2 is similar to the protruding portion 5 4 * and is embedded in the protruding portion 5 4, and the portion corresponding to the protruding portion 5 3 is used as the sliding portion 5 5 and is in close contact with the inner wall 4 a of the outer tube 4. Generally, it is formed of a resin having elasticity. When the above-mentioned syringe _ 5 1 inhales the medicinal solution, the inside of the syringe becomes negative pressure, and the gasket 5 2 may fall off from the spool 5, but the table can resist the above by engaging the gasket 5 2 on the protruding portion 5 3. Negative pressure to prevent falling off. Printed by DuPont Consumer Affairs Bureau of the Intellectual Property Office of the Ministry of Economy. However, the conventional syringe 5 1 shown in Fig. 5 is provided with a protrusion 5 4 to prevent the gasket 5 2 from falling off. The structure of the syringe 51 will cause the inconvenience of being too long. In addition, * The above conventional syringe 51 is embedded with a gasket 5 2 made of a material different from the protrusion 54 of the valve stem 5. 2 and valve column 5 must be formed separately. Therefore, it is inconvenient to combine them in post-engineering. The size of this paper is in accordance with Chinese National Standards (CNS) A and I (210X297 mm) -4- 46775 1 A7 B7 _ V. Description of the invention (2) [Invention disclosure] (Please read the "Notes on the back" before Fill in this 霣) In order to solve the above inconvenience, the present invention aims at providing a method for manufacturing a syringe that can be joined without a gasket, but another object of the present invention is to provide: Method for manufacturing a syringe capable of shortening the total length of a syringe · In order to achieve the above-mentioned object, the present invention is a method for manufacturing a syringe. Syringe made of thermoplastic resin valve stem with sliding inner wall. Either the gasket or the member of the valve column is installed on the mold, and the resin forming the other member is injected into the mold. The injection molding of the resin formed by the elastomer and the other members is in the range of the cylinder temperature of the injection molding machine is 1 3_0 ~ 3 0 0 ° C, and the injection pressure is 2 5 0 ~ 1 500 dagger 8 / (: Executed within the range of 1113. The manufacturing method according to the present invention is printed by the R & D Consumer Cooperative of the 4th Bureau of the Ministry of Economic Affairs. In addition, according to the manufacturing method of the present invention, the valve stem is made of a thermoplastic resin, and the gasket is formed of a thermoplastic elastomer that can be thermally welded to the valve stem. Therefore, the heat and injection pressure during injection molding can be used to join the two. In the above manufacturing method, 'if the cylinder temperature is less than 130eC, or the injection pressure is less than 250fcg / cm3 -5- this paper Standards apply to Chinese national kneading car (CNS > A4 specification (210X297 mm) 6775 1 at B7 5. In the description of the invention (3), you cannot obtain sufficient adhesion strength * Furthermore, if the cylinder temperature exceeds 300 ° C Or, if the injection pressure exceeds 1,500 kg / cm3, the member installed in the mold will be damaged by the resin after injection molding. In addition, in the manufacturing method of the present invention, the front end of the valve stem is The gasket can be fused with the common solvent of the valve column and the gasket, or the gasket can be bonded with an adhesive at the front end of the valve column. In the above manufacturing method, the above The gasket can be joined to the front end portion of the valve stem by welding or adhesion. Therefore, it is not necessary to fit the gasket to a protrusion provided at the front end of the valve stem as in the conventional technology, so that the above can be manufactured more simply. [Simplified description of the drawing] Fig. 1 is an explanatory cross-sectional view showing an example of the configuration of a syringe obtained by the manufacturing method of this embodiment. Fig. 2 is a diagram showing a syringe of this embodiment. An explanatory cross-sectional view of an example of the manufacturing method. Fig. 3 is an explanatory cross-sectional view showing another configuration example of the syringe obtained by the manufacturing method of this embodiment. Fig. 4 is an enlarged view of the gasket shown in Fig. 3 Section 5. Figure 5 is an explanatory sectional view showing an example of the structure of a conventional syringe * [component symbol description] (please fill in this page with the "$" on the back of the back) k. Order. 智慧 Intellectual Property Bureau, Ministry of Economic Affairs Printed by S Industry Consumer Cooperatives «This paper size is applicable to China National Standards of Standards (CNS) A4 (210X297 public shame) -6- 467751 V. Description of Invention (4) A7 B7 Xiao Gong Consumer Cooperative Seal & 1. Syringe 2 Needle, 3 Cone 4 Outer cylinder 4a Inner wall 5 Valve stem 6 Washer 7a '7b Plate-like member 8 Round plate. / 9 Flange 21a, 21b Mold 22 Mold groove 23 Tip valve 24 Injection molding Machine 25 Water passing part 26 Thermoplastic elastomer 32 Washer 33 Pedestal 34 Curved surface 35 Cavity part 36 Ring groove part 37 Bending part 51 Syringe 52 Washer ------------ (Please read the note on the back first Please fill in this page for matters) Order -4- Standards are in accordance with China National Standards (CNS) A4 specifications (2 丨 0X297 mm) A7 B7 4 6 775 1 V. Description of the invention (5) 53 Protruding part 54 Protruding part 55 Sliding part [The best embodiment of the invention] The drawings illustrate embodiments of the present invention in detail as follows. Referring to the first item (1), the syringe 1 produced by the manufacturing method of this embodiment is composed of a synthetic resin outer cylinder 4 having a pointed cone portion 3 on which an injection needle 2 is mounted, and a synthetic resin valve stem 5, The front end of the valve stem 5 is provided with a washer 6 that slides against the inner wall 4 a of the outer cylinder 4. _ The stem 5 is made of synthetic resins such as polybenzene, polyolefin, polyester, polyamide, polycarbonate, and olefin-styrene copolymer. The valve stem 5 is composed of plate-shaped members 7 a and 7 b in a cross shape, and has a circular plate 8 which can be used as a finger placement portion at the rear end, and a flange 9 / washer 6 series at the front end portion. With a curved surface portion protruding sideways, it is a slightly disc-shaped body that closely fits the inner wall 4 a of the outer tube 4 and is in front of the disc-shaped flange 9 on the plane of the bottom of the disc-shaped body. The planes of the ends are joined. The gasket 6 may be a thermoplastic elastomer such as a polystyrene-based elastomer, a polyolefin-based elastomer, a polyester-based elastomer, a polyamide-based elastomer, a polyvinyl chloride-based elastomer, or the like. Polystyrene styrene-butadiene rubber (SBR), etc. Next, a method for manufacturing the spool 5 and the gasket 6 of the present embodiment will be described. This paper is based on the national sample rate of China (CNS > A4 * l (210X297)) (please read the note on the back and then f this page)-Order. Ministry of Economic Affairs 4 Printed by a cooperative • 8-6 46775 ΐ at Β7 V. Description of the invention (In the manufacturing method of this embodiment, firstly, the above-mentioned thermoplastic synthetic resin valve stem 5 can be manufactured according to the conventional injection molding method. As shown in FIG. 2 (a), the valve stem 5 is installed in the molds 2 1 a and 2 1 b. The molds 2 1 a and 2 1 b have the same shape as the valve stem 5 and the gasket 6 The groove 2 2 has a tip valve 23 located at the center of the surface of the gasket 6. The insert 2 1 b has a water passing portion 25 connecting the tip valve 23 and the injection molding machine 24. The mold grooves 2 2 of the molds 2 1 a and 2 1 b are formed by discharge-type cutting, and the inner surface thereof is honed by honing particles having an average particle diameter of 30 to 50 Å / m. Fig. 2 (b) shows the closed state of the molds 2 1 a, 21b equipped with the spool 5. Fig. 2 (c) shows the injection molding machine 2 4 connected to the water passing part 2 of the mold 2 1 b. 5 and will be a thermally fusible thermoplastic body 2 6 for the valve column 5. In a molten state, it is injected into the mold slot 22. The above thermoplastic elastomer 2 6 can be used in combination with the valve column 5. The material is a resin of the same resin. For example, when the material of the valve stem 5 is any one of polystyrene, polyolefin, polyester, polyamide, etc., the above-mentioned thermoplastic elastomer 2 6 can be selected from each of the valve stem 5 The materials are polystyrene elastomer, polyolefin elastomer, polyester elastomer, polyamide elastomer, and polyvinyl chloride elastomer * In addition, the above-mentioned thermoplastic elastomers 26 can also contain Resin having a heat-sealable component for the material of the valve column 5, or resin having added a heat-sealable component to the material of the valve column 5. --------- C—— (Please read the note f on the back before you fill out this page.) R · r, printed by the Ministry of Economic Affairs and the Bureau of Property Management staff #cooperatives printed on this paper standard China National Standards (CNS) Α4ΛΙ 格 (2i〇XW7 (Mm) -9- 46775 1 A7 __B7___ V. Description of the invention (7) And the material which contains the If the material of the above-mentioned thermoplastic elastomer is polyolefin, a polystyrene elastomer can be used when the material of the valve stem 5 is a polyolefin. Furthermore, when the material of the valve stem 5 is polycarbonate or acrylonitrile-butadiene In the case of a styrene copolymer, a poly-series elastomer can be used. When the above-mentioned thermoplastic elastomer having a heat-sealable component is added to the material of the valve column 5, when the material of the valve column 5 is polyolefin • Polystyrene-based elastomers with added polyolefin can be used. In addition, when the material of valve stem 5 is polystyrene, polyolefin-based elastomers with added polystyrene can be used. In this embodiment, while polypropylene is used to form the valve stem 5, the thermoplastic elastomer 26 can use styrene as a hard segment and hydrogenated polyisoprene as a soft segment. Styrene elastomer (styrene-ethylene. Propylene-styrene block copolymer and the styrene-ethylene. Propylene-styrene block copolymer of the thermoplastic elastomer 26 described above contains Resins with heat-sealable components in terms of materials 5 "The injection of the above-mentioned styrene-ethylene. Propylene-styrene block copolymer is an injection molding machine using a general-purpose machine using a screw-stem method 24 And in the injection molding machine with a cylinder temperature of 140 ~ 270 ° C, the injection pressure is within the range of the peak pressure 2 50 ~ 100 kg / cm2 ', and the housing pressure of 5 ~ 50% of the injection pressure is maintained Executed within 1 to 8 seconds. Therefore, the gasket 6 made of the styrene-ethylene · propylene-styrene block copolymer can be thermally welded to the polypropylene valve stem 5 so that the valve stem 5 and the paper The scale applies to the Chinese national kneading rate (CNS > A4 wash grid (210X297 public shame) _ _ --------- 1, / ^ — (please read the note on the back before filling in this page) Order. The Ministry of Economic Affairs, the Ministry of Economic Affairs * Finance 1 Bureau employee elimination «-printed by the cooperative 4 6775 1 A7 ___B7_ Γΐ, description of the invention (8) The gasket 6 is integrally formed. In this embodiment * the preformed valve stem 5 is mounted on the die 2 1 a, 2 1 b, but the formed gasket may be formed in advance. 6 Installed on the mold 2 1 a, 2 1 b »The ring ^ installed on the molds 21a,… ^ The material of the exposed column 5 is softer, so it can be injected at a cylinder temperature of 1 9 and a pressure of 2 5 0 ~ 6 0 In the range of 0 kg / cm2, and maintaining a pressure of 5 to 50% of the injection radon for 0.2 to 8 seconds, the material of the injection valve stem 5 comes out. Furthermore, in order to replace FIG. 2 (A) to the device shown in Figure 2 (c), a two-color forming mold "reverse injection method, core rotation method, core back method, mold sliding method, etc." Material and gasket for sequential injection of valve stem 5 can also be used The material of 6. In the manufacturing method of this embodiment *, the valve stem and the gasket 6 are thermally welded by using the heating and injection pressure during injection molding, but a common solvent may be used. Adhesive to glue the formed valve stem 5 and gasket 6 together. Printed by the Ministry of Economic Affairs and Intellectual Property Bureau 8th Industrial Consumers' Union I 丨 — II --- ^ L-- (Please read the back For the matters needing attention, please fill in this I) -sir When using a common solvent for welding, for example, the valve stem 5 obtained by injection molding of polystyrene and styrene mixed with 5 ~ 3 5% polystyrene -The gasket 6 obtained by the thermosetting process of butadiene rubber is dissolved in a part by dichloroethane, a common solvent of the two materials, and the dissolved parts are crimped to join them. . In addition, when using an adhesive, for example, a cyanoacrylate adhesive can be used to adhere to the valve stem 5 formed by injection molding of polypropylene. This paper size applies to China's national kneading rate (CNS & gt A4 size (210X297 mm) 11 · 467751 A7 B7_ V. Description of the invention (9) Washer obtained by thermosetting molding method using styrene-butadiene rubber mixed with 5 ~ 3 5% polystyrene 6. Regardless of whether the above-mentioned common solvent is used for welding or the adhesive is used for bonding, the combination of the material of the valve stem 5 and the material of the gasket 6 is not limited to the above-mentioned polypropylene and polystyrene-containing styrene-butadiene. Ethylene rubber, as long as it is a resin that can produce adhesion to the material of the valve stem 5 through an adhesive, an organic solvent, etc. "For example, when the material of the valve stem 5 is polystyrene, the gasket 6 is formed. The resin can be polystyrene elastomer, polyolefin elastomer, polystyrene-added styrene-butadiene rubber, etc., and when the material of the valve stem 5 is polyolefin, the resin forming the gasket 6 Examples thereof include polyolefin-based elastomers and polystyrene-based elastomers. The above-mentioned common solvent is not limited to the above-mentioned dichloroethane, as long as it is a solvent that can dissolve the material of the valve stem 5 and the material of the gasket 6. Although the above-mentioned adhesive has an atmosphere having excellent adhesion for the adhesion of different materials Acrylate-based adhesives are preferred, but any adhesive that can bond the material of the valve stem 5 and the material of the gasket 6 is also acceptable. In addition, a detonator can be used for bonding, or The adhesive surface is subjected to a modified pretreatment operation. In the syringe 1 obtained by the manufacturing method of this embodiment, as long as the gasket 6 is joined to the valve column 5 by any of the methods described above, the valve column is pulled to make the liquid medicine. When it is injected into the outer cylinder 4, even if the outer cylinder 4 has a negative housing, the gasket 6 will not be peeled from the valve stem 5. Furthermore, the manufacturing method of this embodiment can be used to produce Composition of the syringe 3 1. Close to the syringe 3 1 (Please read the "Notes on the back" before filling out this page)
本紙張尺度適用中國國家揉牵（CNS ) Α4规格（210Χ W7公釐） -12- 467751 A7 B7_ 五、發明説明（1〇 ) 的外筒4之內壁4 a滑動的墊圈3 2係以與凸緣9之間存 在著間隔的方式接合在設於閥柱5之前端凸緣9的台座3 3 · 墊圈3 2如第4圖中擴大所示般，係爲具有側方係朝 外方突出，且緊貼著外筒4之內壁4 a的曲面3 4的略園 盤狀體，並在閥柱5側具有可嵌合台座的穴部3 5，且在 閥柱5的相反側上具有直徑比台座3 3爲大的環狀溝部 3 6 *且該環狀溝部3 6的外周側即爲簿曲部3 7。 彎曲部3 7在墊圈3 2沿著外筒4的內壁4 a滑動時 ，會以環狀溝部3 6的底部爲支點而可朝閥柱5的軸方向 自由彎曲。因此，當拉引閥柱5將菜液吸入外筒4內時， 因爲外筒4內變成負壓，所以彎曲部3 7便會朝向環狀溝 部3 6側彎曲。此時，只要該墊圈3 2係利用上述任一方 法與閥柱5接合的話，則即使外筒4內如上述般變成負壓 ，仍不會自閥柱5剝離、^ 此外，按壓閥柱5以注入外筒4內的藥液時，因爲墊 圈3 2爲正壓所以彎曲部3 7係朝閥柱5側彎曲•此時* 因爲台座的直徑係比凸緣9爲小，並且墊圈3 2係以與凸 緣9之間存在間隔的方式與台座3 3接合，所以彎曲部 3 7便可如伸入台座3 3之外周側般地彎曲》 並且，墊圈3 2因爲在閥柱5側具有穴部3 5 *所以 在利用上述共通溶劑或黏接劑來黏接時，可藉由將穴部3 5嵌合於台座3 3，而使埜圈3 2與閥柱5自動地呈同軸 般，使其更容易完成該定位。 <請先閱讀背面之注意事項再填寫本頁> C- 訂 r 經濟部智慧財產局WK工消费合作社印製 本紙張尺度適用中Η國家標率（CNS > A4规格（210X297公釐） • 13 4 6 7 75 1 A7 B7 五、發明说明（1彳） 〔產業上之利用可能性〕 本發明係可用於做爲轚療器具等之用後即棄式注射器 的製造方法。 ----------i/w-- (请先《讀背面之注意Ϋ項再填寫本頁) 訂· 經濟部智慧財產局8工消費合作社印製 本紙張尺度適用中國國家揉準（CNS ) A4规格（210X297公釐） _ ·|4 -This paper size applies to China National Kneading (CNS) A4 specification (210 × W7 mm) -12- 467751 A7 B7_ V. The inner wall of the outer cylinder 4 of the invention description (10) 4 a sliding washer 3 2 The flanges 9 are spaced from each other and are joined to the base 3 of the flange 9 provided at the front end of the spool 5 as shown in the enlarged view in FIG. 4. And is abutted on the inner wall 4 a of the outer cylinder 4 a curved disc-shaped body 3 4, and has a cavity 35 that can be fitted with a seat on the side of the valve column 5, and on the opposite side of the valve column 5 The annular groove portion 36 having a larger diameter than the pedestal 33 is provided with a curved portion 37 at the outer peripheral side of the annular groove portion 36. When the washer 3 2 slides along the inner wall 4 a of the outer cylinder 4, the bent portion 37 can bend freely in the axial direction of the spool 5 with the bottom of the annular groove 36 as a fulcrum. Therefore, when the valve stem 5 is pulled to draw the vegetable liquid into the outer cylinder 4, since the inside of the outer cylinder 4 becomes negative pressure, the bent portion 37 is bent toward the annular groove portion 36 side. At this time, as long as the gasket 32 is connected to the valve stem 5 by any of the methods described above, even if the inside of the outer cylinder 4 becomes a negative pressure as described above, the gasket 5 will not be peeled off from the valve stem 5 and the valve stem 5 is pressed. When injecting the chemical solution into the outer cylinder 4, since the washer 3 2 is a positive pressure, the bent portion 37 is bent toward the spool 5 side. At this time * because the diameter of the base is smaller than the flange 9 and the washer 3 2 Since it is engaged with the pedestal 3 3 with a gap from the flange 9, the bent portion 37 can be bent as if it protrudes into the outer peripheral side of the pedestal 3 3. Also, the washer 3 2 is provided on the spool 5 side. The cavity portion 3 5 * Therefore, when the common solvent or the adhesive is used for bonding, the cavity portion 3 5 can be automatically coaxial with the valve stem 5 by fitting the cavity portion 3 5 to the pedestal 3 3. To make it easier to complete the positioning. < Please read the notes on the back before filling this page > C- Order r Printed by WK Industrial Consumer Cooperatives, Intellectual Property Bureau of the Ministry of Economy, this paper is printed in accordance with China National Standard (CNS > A4 size (210X297 mm) • 13 4 6 7 75 1 A7 B7 V. Description of the invention (1 彳) [Industrial application possibilities] The present invention is a method for manufacturing disposable syringes that can be used as a therapeutic device. --- ------- i / w-- (Please read "Notes on the back" before filling out this page) Order · Printed by the Intellectual Property Bureau of the Ministry of Economic Affairs, 8th Industrial Cooperative Cooperative, the paper size is applicable to the Chinese National Standards (CNS ) A4 size (210X297mm) _ · | 4-