JPS6340616B2 - - Google Patents
Info
- Publication number
- JPS6340616B2 JPS6340616B2 JP55089509A JP8950980A JPS6340616B2 JP S6340616 B2 JPS6340616 B2 JP S6340616B2 JP 55089509 A JP55089509 A JP 55089509A JP 8950980 A JP8950980 A JP 8950980A JP S6340616 B2 JPS6340616 B2 JP S6340616B2
- Authority
- JP
- Japan
- Prior art keywords
- needle
- adhesive
- hole
- needle tube
- manufacturing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/48—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor using adhesives, i.e. using supplementary joining material; solvent bonding
- B29C65/4895—Solvent bonding, i.e. the surfaces of the parts to be joined being treated with solvents, swelling or softening agents, without adhesives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
- B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
- B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
- B29C66/53—Joining single elements to tubular articles, hollow articles or bars
- B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
- B29C66/5344—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially annular, i.e. of finite length, e.g. joining flanges to tube ends
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Description
【発明の詳細な説明】
本発明は注射針の製造方法に関するものであ
る。注射針の形態は序々に変化して来て今はその
ほとんどが、プラスチツク製の針基にステンレス
製針管を化学接着剤で接合して注射針を組立完成
をして、一般市場へ提供されてきている。特殊形
状の注射針には金属製針基を有してステンレス製
針管をその金属製針基に結合している。この場合
は、機械的に圧入又はプレスカシメをして組立完
成をしていた。大量消費される皮下用系統の注射
針は、通称デスポーザブル皮下用針として流通さ
れているもので、末端医療機関では、該皮下針を
患者へ注射をする場合、一回限り使い捨て方式で
消費しているため、消費量は増加の一途をたどつ
ている。しかし乍ら製造設備の高度化、高速化、
量産化に従い生産コストは下つてはいるが各メー
カーの量産、製造コストの引き下げに伴つて販売
競争が激化している今日、逆に材料のコストが高
騰し、生産コストの引き下げは極めて困難になつ
てきている。そこで本発明は従来の注射針の組立
工法を改めて、更に製造コストを引き下げて、よ
り勝れた注射針の製造方法に関して提供するもの
である。第１図は従来方法によつて製造した注射
針の一実施例側面断面図である。合成樹脂製針基
１にステンレス製針管２を、エポキシ合成樹脂製
接着剤３で接着結合してある。製造工程に於て該
接着剤３の粘度に従つて針基１の針管結合用孔１
ａの口孔の内径を広く取つて接着剤が充分に針管
１の周囲に乗つて豊かな脹らみを提して接着が完
了されている。エポキシ合成樹脂製接着剤には有
機溶剤が混合され有しているので針基１の孔１ａ
の内面を該溶剤で化学変化を与えて接着を容易に
しているが、接着組立られてから該溶剤が空気中
に飛散し針基１と針管２との接着接合が安定する
までに所定時間を要する。従つて強制的に熱を与
えて該溶剤を短時間に飛散させている。該熱源は
電熱器、赤外線ランプ等を使用して該接着部分を
加熱して、その有機溶剤を飛散させている。第２
図は第１図の針基１の組立前の側面断面図であ
る。針基１に針管を接合する孔１ａは孔口を広く
取つて角度θを提している。この角度θを出来る
だけ広く取つて針管２と接着剤との接着具合を良
くしている。第３図は本発明の製造方法に伴う針
基４の側面断面図である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing an injection needle. The form of syringe needles has gradually changed, and now most of them are sold to the general market after being assembled by bonding a stainless steel needle tube to a plastic needle base using chemical adhesive. ing. The specially shaped injection needle has a metal needle base, and a stainless steel needle tube is connected to the metal needle base. In this case, the assembly was completed by mechanically press-fitting or press-caulking. Hypodermic needles, which are consumed in large quantities, are commonly known as disposable hypodermic needles, and in terminal medical institutions, when injecting patients with hypodermic needles, they are used only once and are disposable. As a result, consumption continues to increase. However, as manufacturing equipment becomes more sophisticated and faster,
Although production costs are coming down with mass production, today sales competition is intensifying as manufacturers reduce mass production and manufacturing costs.On the other hand, material costs are rising, making it extremely difficult to reduce production costs. It's coming. SUMMARY OF THE INVENTION Accordingly, the present invention aims to provide a more superior method of manufacturing a syringe needle by revising the conventional method of assembling a syringe needle and further reducing manufacturing costs. FIG. 1 is a side cross-sectional view of one embodiment of an injection needle manufactured by a conventional method. A stainless steel needle tube 2 is adhesively bonded to a synthetic resin needle base 1 with an epoxy synthetic resin adhesive 3. During the manufacturing process, the needle tube coupling hole 1 of the needle base 1 is adjusted according to the viscosity of the adhesive 3.
The inner diameter of the orifice a is set wide so that the adhesive sufficiently covers the periphery of the needle tube 1, creating a rich bulge and completing the bonding. Since the epoxy synthetic resin adhesive contains an organic solvent mixed with it, the hole 1a of the needle base 1
The inner surface of the needle base 1 and the needle tube 2 are chemically changed with the solvent to facilitate adhesion, but it takes a certain amount of time after the adhesive assembly is completed for the solvent to scatter in the air and for the adhesive bond between the needle base 1 and the needle tube 2 to become stable. It takes. Therefore, heat is forcibly applied to scatter the solvent in a short time. The heat source uses an electric heater, an infrared lamp, or the like to heat the bonded portion and scatter the organic solvent. Second
The figure is a side cross-sectional view of the needle hub 1 of FIG. 1 before assembly. The hole 1a that connects the needle tube to the needle hub 1 has a wide opening to form an angle θ. This angle θ is set as wide as possible to improve the adhesion between the needle tube 2 and the adhesive. FIG. 3 is a side sectional view of the needle base 4 according to the manufacturing method of the present invention.
針管２を結合する針基４の孔４ａの角度θを小
さくした隙間５を形成して、その孔４ａの表面に
ニツケル、クローム等金属４ｂの蒸着メツキを施
しておく。次に針管２を該孔４ａへ嵌合して、エ
ポキシ合成樹脂接着剤を該針管２と該金属４ｂを
蒸着メツキした面とのすき間５に注入する。該金
属４ｂを孔４ａはその内周面に蒸着メツキをする
ことによつて表面張力が小くなつて、エポキシ合
成樹脂製接着剤が極めて円滑に該すき間５へ高速
度に充満することができるので、前述した針基１
の孔１ａの孔口を広くする角度θよりもすき間５
を極めて小さくすることが出来る。すき間５が形
成されている孔４ａはその体積が従来よりも極め
て小さくなつているので注入するエポキシ合成樹
脂製接着剤の量は少くて済む。従つて該接着剤に
含有している有機溶剤を加熱し空気中へ飛散させ
る所要時間は従前以上に極めて少ない加熱時間で
済む。 A gap 5 is formed by reducing the angle θ of the hole 4a of the needle base 4 that connects the needle tube 2, and the surface of the hole 4a is plated with a metal 4b such as nickel or chrome. Next, the needle tube 2 is fitted into the hole 4a, and an epoxy synthetic resin adhesive is injected into the gap 5 between the needle tube 2 and the surface plated with the metal 4b. By applying vapor deposition plating to the inner peripheral surface of the hole 4a of the metal 4b, the surface tension is reduced, and the epoxy synthetic resin adhesive can fill the gap 5 extremely smoothly at a high speed. Therefore, the needle base 1 mentioned above
The gap 5 is larger than the angle θ that widens the opening of the hole 1a.
can be made extremely small. Since the volume of the hole 4a in which the gap 5 is formed is much smaller than that of the conventional case, the amount of epoxy synthetic resin adhesive to be injected can be small. Therefore, the time required to heat the organic solvent contained in the adhesive and scatter it into the air is much shorter than before.
第４図は第３図の説明によつて製造した一実施
例の注射針の側面断面図である。針管２が第３図
の一実施例針基４に嵌合してエポキシ合成樹脂製
接着剤３ａで接着結合してある。該接着剤３ａ
は、針管２と蒸着メツキした該金属４ｂとを接着
結合しているのであるが該接着剤３ａの量が従前
に比して、蒸着メツキした該金属４ｂによつて少
量で済んでいる。以上の様に本発明の一実施例に
よれば、製造工程に於いて、エポキシ接着剤の使
用量を金属４ｂの蒸着メツキ表面の表面張力によ
つて極めて少くし、接着剤中の有機溶剤を加熱し
空気中へ飛散させる熱量と加熱時間は共に少くて
済み、仕上り出来具合も極めてスマートに出来
て、接着強度も従前同様に有している等々の特徴
を有した注射針の製造方法であり、針基４を単体
で注射針製造者へ供与してその先に於ても上述し
た様に注射針を製造して生産コストを従前以上に
下げることが出来る等の特徴を有している。 FIG. 4 is a side sectional view of an example of an injection needle manufactured according to the explanation of FIG. 3. The needle tube 2 is fitted into the needle base 4 of the embodiment shown in FIG. 3 and adhesively bonded with an epoxy synthetic resin adhesive 3a. The adhesive 3a
Although the needle tube 2 and the vapor-plated metal 4b are adhesively bonded to each other, the amount of adhesive 3a can be reduced compared to the conventional method due to the vapor-deposited metal 4b. As described above, according to one embodiment of the present invention, in the manufacturing process, the amount of epoxy adhesive used is extremely reduced due to the surface tension of the vapor-deposited plating surface of the metal 4b, and the organic solvent in the adhesive is reduced. This method of manufacturing injection needles has the following characteristics: it requires less heat and heating time to be heated and dispersed into the air, the finished product is extremely smart, and the adhesive strength remains the same as before. , the needle hub 4 can be provided to a needle manufacturer as a single unit, and the needles can then be manufactured as described above, thereby reducing the production cost more than before.
第１図…従来方法によつて製造した注射針の一
実施例。第２図…第１図の針基１の組立前の側面
断面図。第３図…本発明製造方法に伴う針基４の
側面断面図。第４図…本発明製造方法によつて製
造した一実施例の注射針の側面断面図。１……針
基。１ａ……孔。２……針管。３，３ａ……エポ
キシ合成樹脂製接着剤。４……針基。４ａ……
孔。４ｂ……蒸着メツキした金属。５……すき
間。θ……角度。
FIG. 1: An example of a syringe needle manufactured by a conventional method. FIG. 2: A side sectional view of the needle hub 1 shown in FIG. 1 before assembly. FIG. 3: A side sectional view of the needle base 4 according to the manufacturing method of the present invention. FIG. 4: A side sectional view of an example of an injection needle manufactured by the manufacturing method of the present invention. 1... Needle base. 1a... hole. 2...Needle tube. 3, 3a...Epoxy synthetic resin adhesive. 4... Needle base. 4a...
Hole. 4b...metal plated by vapor deposition. 5...Gap. θ...Angle.
Claims (1)
した隙間を形成し、該隙間の内周前面にニツケ
ル、クローム等金属を蒸着メツキして後に該針基
の孔に針管を嵌合し接着剤で接合することを特徴
とした注射針の製造方法。1 Form a gap with a small angle of the hole for connecting the needle tube in the synthetic resin needle base, plate the inner front surface of the gap with metal such as nickel or chrome, and then fit and bond the needle tube into the hole in the needle base. A method for manufacturing a hypodermic needle, characterized by bonding with an agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8950980A JPS5714437A (en) | 1980-06-30 | 1980-06-30 | Production of injection needle and needle base thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8950980A JPS5714437A (en) | 1980-06-30 | 1980-06-30 | Production of injection needle and needle base thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5714437A JPS5714437A (en) | 1982-01-25 |
| JPS6340616B2 true JPS6340616B2 (en) | 1988-08-11 |
Family
ID=13972746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8950980A Granted JPS5714437A (en) | 1980-06-30 | 1980-06-30 | Production of injection needle and needle base thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5714437A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5807317A (en) * | 1997-02-27 | 1998-09-15 | Microtek Medical, Inc. | Trocar with concave cutting surface |
| JPWO2006132176A1 (en) * | 2005-06-06 | 2009-01-08 | 武田薬品工業株式会社 | Adhesive for injection needle and method for adhering injection needle, front assembly for syringe, and syringe |
-
1980
- 1980-06-30 JP JP8950980A patent/JPS5714437A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5714437A (en) | 1982-01-25 |
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