JPH0220410B2 - - Google Patents
Info
- Publication number
- JPH0220410B2 JPH0220410B2 JP60067281A JP6728185A JPH0220410B2 JP H0220410 B2 JPH0220410 B2 JP H0220410B2 JP 60067281 A JP60067281 A JP 60067281A JP 6728185 A JP6728185 A JP 6728185A JP H0220410 B2 JPH0220410 B2 JP H0220410B2
- Authority
- JP
- Japan
- Prior art keywords
- members
- octopus
- octopus tube
- molding
- tube
- 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 - Lifetime
Links
- 241000238413 Octopus Species 0.000 claims description 28
- 238000001746 injection moulding Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 16
- 238000001802 infusion Methods 0.000 claims description 9
- 238000000465 moulding Methods 0.000 claims description 9
- 238000004519 manufacturing process Methods 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 7
- 239000011347 resin Substances 0.000 claims description 7
- 229920005992 thermoplastic resin Polymers 0.000 claims description 5
- 238000002347 injection Methods 0.000 claims description 4
- 239000007924 injection Substances 0.000 claims description 4
- -1 polyethylene Polymers 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 229920001155 polypropylene Polymers 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001990 intravenous administration Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000008155 medical solution Substances 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、薬液を生体内に注入するために使用
する輸液セツトに用いるタコ管の成形方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for forming an octopus tube used in an infusion set used for injecting a medical solution into a living body.
一般に使用されている輸液セツトには、薬液中
に含まれる気泡が生体内に流入しないようにする
ためにタコ管が設けられている。このタコ管は、
従来は熱可塑性樹脂のブロー成形法により製造さ
れてきた。しかしこの方法により成形したタコ管
は針取付部にバリが発生するため、成形後にバリ
を除去するための研削加工が必要であり、生産コ
ストが高くなる欠点があつた。また、成形精度が
劣るため、良好な製品を安定して製造することが
難しいという問題があつた。
Generally used infusion sets are equipped with an octopus tube to prevent air bubbles contained in the medicinal solution from flowing into the living body. This octopus tube is
Conventionally, they have been manufactured by blow molding thermoplastic resin. However, the octopus tube molded by this method has burrs on the needle attachment part, so grinding is required to remove the burrs after molding, which has the disadvantage of increasing production costs. Furthermore, there was a problem in that it was difficult to stably manufacture good products due to poor molding accuracy.
このような問題点を解決せんがために、近年に
なつて射出成形法によるタコ管の製造が試みられ
ているが、タコ管は両端が細い中空構造になつて
いるため、一度に成形することはできない。そこ
で、タコ管を２つの部分に分割して射出成形し、
次いで両者を嵌合させて一体化する方法が採用さ
れている。この方法によれば精度の高い成形品を
製造することはできるが、嵌合工程を必要とする
ため、嵌合部のバリやひけ等による液漏れや嵌合
応力による割れが経時的に発生する可能性があ
る。したがつてこの方法では100％の品質保証が
得られなかつた。 In order to solve these problems, attempts have been made in recent years to manufacture octopus tubes using injection molding, but since octopus tubes have a hollow structure with narrow ends, it is difficult to mold them all at once. I can't. Therefore, we divided the octopus tube into two parts and injection molded them.
A method has been adopted in which the two are then fitted together and integrated. Although it is possible to manufacture highly accurate molded products using this method, since it requires a fitting process, liquid leakage due to burrs and sink marks at the fitting part and cracking due to fitting stress occur over time. there is a possibility. Therefore, this method could not guarantee 100% quality.
本発明の目的は、成形精度が良好なタコ管の成
形方法を提供することにある。本発明の他の目的
は、品質の安定化が図れ製造工程全体を自動化す
ることができるタコ管の成形方法を提供すること
にある。
An object of the present invention is to provide a method for forming an octopus tube with good forming accuracy. Another object of the present invention is to provide a method for forming an octopus tube that can stabilize quality and automate the entire manufacturing process.
本発明は、熱可塑性樹脂を成形して輸液用タコ
管を製造するに際し、タコ管の略中央部で分割さ
れた形状を有する２つの部材を射出成形法により
製造し、しかる後にこの２つの部材を突き合わせ
た状態で突き合わせ部に樹脂を射出成形して両部
材を一体となすことを特徴とする輸液用タコ管の
成形方法である。
The present invention, when manufacturing an octopus tube for infusion by molding a thermoplastic resin, manufactures two members having a shape divided approximately at the center of the octopus tube by an injection molding method, and then separates the two members. This is a method of molding an octopus tube for infusion, which is characterized in that the two members are made into one body by injection molding a resin on the abutted portion while the two members are butted against each other.
以下、図面により本発明をさらに詳細に説明す
る。第１図は、本発明の方法により製造されたタ
コ管の１例を示す斜視図である。タコ管は、中央
部に空気溜め１があり、薬液と共に流れてきた気
泡を捕集して、気泡が生体に入るのを防止する。
タコ管の一端２は、静脈針を接続するためにルア
ー・テーパーに形成されており、他端３も輸液回
路を接続するために同様にルアー・テーパーに形
成されている。このような構造であるので、これ
を一度に射出成形により製造することはできな
い。なぜなら、中空部は内部の方が広くなつてい
るので、中空部を形成するためのコア・ピンを挿
入する部分がないからである。そこで本発明にお
いては、タコ管を中央部で２つに分割して製造す
る。すなわち、第１図の線―で示す部分で分
割し第２図に示すように、これら２つの部材を射
出成形により製断する。第２図は、製造されたこ
れら２つの部材の断面図である。次に、これら２
つの部材を第３図に示すように突き合わせ、突き
合わせ部に樹脂を射出成形して両部材が一体にな
るようにする。このとき、突き合わせ部に溝４を
形成するように両部材を成形しておき、２回目の
射出成形によつてこの溝４を埋めるようにしてや
れば最終的な製品では突き合わせ部に凹凸がなく
なるので好ましい。このとき、溝４は全周にわた
つて形成しておくのが好ましい。第４図は、この
ようにして得られたタコ管の断面図である。 Hereinafter, the present invention will be explained in more detail with reference to the drawings. FIG. 1 is a perspective view showing an example of an octopus tube manufactured by the method of the present invention. The octopus tube has an air reservoir 1 in the center, which collects air bubbles flowing together with the medicinal solution and prevents the air bubbles from entering the living body.
One end 2 of the octopus tube is formed with a Luer taper for connecting an intravenous needle, and the other end 3 is similarly formed with a Luer taper for connecting an infusion circuit. Because of this structure, it cannot be manufactured all at once by injection molding. This is because the hollow part is wider on the inside, so there is no part to insert a core pin to form the hollow part. Therefore, in the present invention, the octopus tube is manufactured by dividing it into two parts at the center. That is, it is divided at the part indicated by the line - in FIG. 1, and as shown in FIG. 2, these two members are cut by injection molding. FIG. 2 is a cross-sectional view of these two manufactured parts. Next, these two
The two members are butted together as shown in FIG. 3, and resin is injection molded onto the abutted portions so that the two members are integrated. At this time, if both parts are molded so that a groove 4 is formed at the abutting part, and this groove 4 is filled in by the second injection molding, there will be no unevenness in the abutting part in the final product. preferable. At this time, it is preferable to form the groove 4 over the entire circumference. FIG. 4 is a cross-sectional view of the octopus tube obtained in this manner.
本発明において使用する熱可塑性樹脂としては
ポリエチレンやポリプロピレンなどの汎用熱可塑
性樹脂が好ましく使用される。また第１回目の射
出成形と第２回目の射出成形とは同種の樹脂を用
いて行うのが好ましい。 As the thermoplastic resin used in the present invention, general-purpose thermoplastic resins such as polyethylene and polypropylene are preferably used. Further, it is preferable that the first injection molding and the second injection molding be performed using the same type of resin.
本発明においては、タコ管の分割の仕方は上述
の例に限定されるものではないが、左右対称にな
るように分割するのが便利である。 In the present invention, the method of dividing the octopus tube is not limited to the above example, but it is convenient to divide the octopus tube symmetrically.
本発明においては、上述したようにタコ管を２
つに分割して成形するので成形用コア・ピンを挿
入することができ、射出成形が可能となる。そし
て、次にこれら２つの部材を突き合わせた状態で
金型内にセツトし、突き合わせ部に樹脂を射出成
形することにより一体化する。
In the present invention, as described above, the octopus tube is
Since it is molded separately, a core pin for molding can be inserted, making injection molding possible. Then, these two members are set in a mold in abutted state, and integrated by injection molding resin into the abutted portion.
市販のポリプロピレンを用いて第２図に示すよ
うなタコ管を２分割したものを射出成形により製
造した。次にこの成形部材２つを第３図に示すよ
うに互いに向き合つた状態で突き合わせ、金型内
にセツトして再びポリプロピレンを用いて突き合
わせ部に形成された溝４を埋めるように射出成形
した。
An octopus tube divided into two parts as shown in FIG. 2 was manufactured by injection molding using commercially available polypropylene. Next, as shown in Figure 3, these two molded members were butted against each other in a state facing each other, set in a mold, and again injection molded using polypropylene so as to fill the groove 4 formed in the butted part. .
このようにして得られたタコ管は良好な外観を
有しており、ルアー・テーパー部などの成形精度
は十分に満足できるものであつた。また、突き合
わせ部は完全に樹脂で埋められており、液漏れや
破断のおそれのないものであつた。 The octopus tube thus obtained had a good appearance, and the molding accuracy of the luer taper portion, etc. was sufficiently satisfactory. In addition, the abutting portion was completely filled with resin, and there was no fear of liquid leakage or breakage.
本発明は、射出成形法によりタコ管を製造する
ので、高い成形精度を得ることができる。また、
研削や嵌合などの工程がないので品質の安定化が
図れ、工程全体を完全に自動化することが容易で
あり、生産コストの大幅な低減が可能になる。さ
らに、２つの部材は射出成形により供給された樹
脂により一体化されているので、単なる嵌合や接
着剤による接着にくらべて強度が大きく、液漏れ
の心配もない。
Since the present invention manufactures the octopus tube by injection molding, high molding accuracy can be obtained. Also,
Since there are no processes such as grinding or fitting, quality can be stabilized, and the entire process can be easily fully automated, making it possible to significantly reduce production costs. Furthermore, since the two members are integrated using resin supplied by injection molding, the strength is greater than that of simple fitting or bonding with adhesive, and there is no fear of liquid leakage.
第１図は、本発明の方法により製造された輸液
用タコ管の１例を示す斜視図である。また、第２
図〜第４図は、本発明の方法によりタコ管が製造
されていく工程を示す断面図であり、第２図は１
回目の射出成形により製造された２つの部材を示
し、第３図はこの２つの部材を突き合わせた状態
を示し、第４図は２回目の射出成形を行つて得ら
れたタコ管を示す。
１……空気溜め、２…静脈針接続部、３……輸
液回路接続部。
FIG. 1 is a perspective view showing an example of an infusion tube manufactured by the method of the present invention. Also, the second
4 to 4 are cross-sectional views showing the steps in which an octopus tube is manufactured by the method of the present invention, and FIG.
The two members manufactured by the second injection molding are shown, FIG. 3 shows the two members butted together, and FIG. 4 shows the octopus tube obtained by the second injection molding. 1... Air reservoir, 2... Intravenous needle connection part, 3... Infusion circuit connection part.
Claims (1)
するに際し、タコ管の略中央部で分割された形状
を有する２つの部材を射出成形法により製造し、
しかる後にこの２つの部材を突き合わせた状態で
突き合わせ部に樹脂を射出成形して両部材を一体
となすことを特徴とする輸液用タコ管の成形方
法。1. When manufacturing an infusion octopus tube by molding a thermoplastic resin, two members having a shape divided approximately at the center of the octopus tube are manufactured by injection molding,
A method for molding an octopus tube for infusion, which comprises: thereafter, with the two members abutted against each other, resin is injection molded onto the abutting portion to make both members integral.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60067281A JPS61226060A (en) | 1985-03-29 | 1985-03-29 | Molding of infusion tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60067281A JPS61226060A (en) | 1985-03-29 | 1985-03-29 | Molding of infusion tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61226060A JPS61226060A (en) | 1986-10-07 |
| JPH0220410B2 true JPH0220410B2 (en) | 1990-05-09 |
Family
ID=13340429
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60067281A Granted JPS61226060A (en) | 1985-03-29 | 1985-03-29 | Molding of infusion tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61226060A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8814259B2 (en) | 2012-02-20 | 2014-08-26 | Inalfa Roof Systems Group B.V. | Frame for open roof construction |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59165632A (en) * | 1983-03-10 | 1984-09-18 | Japan Steel Works Ltd:The | Method and apparatus for injecting and molding hollow article |
-
1985
- 1985-03-29 JP JP60067281A patent/JPS61226060A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59165632A (en) * | 1983-03-10 | 1984-09-18 | Japan Steel Works Ltd:The | Method and apparatus for injecting and molding hollow article |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61226060A (en) | 1986-10-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |