JPH02174855A - Method and apparatus for preparing injection needle made of synthetic resin - Google Patents
Method and apparatus for preparing injection needle made of synthetic resinInfo
- Publication number
- JPH02174855A JPH02174855A JP63329020A JP32902088A JPH02174855A JP H02174855 A JPH02174855 A JP H02174855A JP 63329020 A JP63329020 A JP 63329020A JP 32902088 A JP32902088 A JP 32902088A JP H02174855 A JPH02174855 A JP H02174855A
- Authority
- JP
- Japan
- Prior art keywords
- opening
- conical
- needle
- synthetic resin
- shaped
- 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.)
- Granted
Links
- 238000002347 injection Methods 0.000 title claims abstract description 38
- 239000007924 injection Substances 0.000 title claims abstract description 38
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 33
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 33
- 238000000034 method Methods 0.000 title claims abstract description 13
- 230000007246 mechanism Effects 0.000 claims abstract description 55
- 238000004519 manufacturing process Methods 0.000 claims abstract description 23
- 229920001169 thermoplastic Polymers 0.000 claims abstract description 10
- 239000004416 thermosoftening plastic Substances 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 230000006837 decompression Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 2
- 230000005855 radiation Effects 0.000 abstract description 2
- 238000009751 slip forming Methods 0.000 abstract 1
- 238000007711 solidification Methods 0.000 abstract 1
- 230000008023 solidification Effects 0.000 abstract 1
- 238000005520 cutting process Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 239000012467 final product Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 244000061508 Eriobotrya japonica Species 0.000 description 1
- 235000009008 Eriobotrya japonica Nutrition 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、全体を合成樹脂で一体形成した新規な合成
樹脂製注射針の製造法およびその製造装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a novel synthetic resin injection needle integrally formed entirely of synthetic resin, and an apparatus for manufacturing the same.
従来、この神の１を置針は、第８図に示されるように、
中空の金属針■と注射器への取付用の取付体Ｉ＋とが接
着剤■によって一体的に固７１されている構造のもが知
られている。そして、１）１１記取付体■は合成樹脂な
どによる射出成形手段で量Ｊ？ζされ、注射３ｉ自体は
所謂、使用の都度使い捨てとして消費されている。Conventionally, the needle for this god 1 was as shown in Figure 8.
A structure in which a hollow metal needle (2) and a mounting body (I+) for attachment to a syringe are integrally fixed 71 with adhesive (3) is known. 1) The mounting body (■) in item 11 is made of synthetic resin or the like by injection molding. ζ, and the injection 3i itself is so-called disposable and consumed each time it is used.
（発明が解決しようとする課題〕
ところで、上述の従来例では、構造が複雑で、製造に手
間が掛るにも拘らず、−回毎の使い捨てであるためコス
ト高であるという３題があった。(Problems to be solved by the invention) By the way, the above-mentioned conventional example has three problems: the structure is complex and the manufacturing process is time-consuming, and the cost is high because it is disposable every time. .
この発明は、叙上の点に着目して成されたもので、使い
捨てでも経済性でコスト安の新規な合成樹脂製注射針を
得ることを目的とするもので、円筒部および円錐状部よ
り成る一端を開口部としたキャップ状注射針原形体を熱
可塑性合成樹ｌ后で成形し、該原形体の開口部を弁機構
で閉塞した状態で、円錐状部を局部的に加熱軟化させ乍
ら、萌配置鉗状部の先端を把持して減圧伸長させ、前記
原形体の中空部の容積を一定に保持することにより円錐
状部の円筒部に近い個処をラッパ状の絞り部に変形させ
、さらに該絞り部に続いて細小な中空針状に伸長変形さ
せ、かつ冷却して最終の中空針状部を形成して固化した
後、先端部分を切截して注射容器取付用の開口部を備え
た円筒部に連設した中空針部を得るようにしたことを特
徴とする合成樹脂製注射針の製造法に係り、さらに円筒
部および円錐状部より成る一端を開口部としたキャップ
状注射針原形体を熱可塑性合成樹脂で成形し、該キャッ
プ状注射針原形体の円錐状部を局部的に加熱軟化させ乍
ら、１）「配置錐状部の先端を把持して細小な中空針状
に変形するまで減圧伸長させる過程の初期段階で、前記
開口部をブを機構で閉塞して中空部の容積を一定に保持
することにより、円錐状部の円筒部に近い個処をラッパ
状の絞り部に変形させ、ついで前記開口部を開放してさ
らに伸長させて、前記円錐状部のラッパ状の絞り部に変
形した個処に続いて中空針状に変形させ、かつ冷却して
最終の中空針状部を形成して固化した後、先端部分を切
截して注射容器取付用の開口部を備えた円筒部に連設し
た中空針部を１１するようにしたことを特徴とする合成
樹脂製注射針の製造法に係り、なを、さらに円筒部およ
び円錐状部より成る一端を開口部としたキャップ状注射
針原形体を熱可塑性合成樹脂で成形し、該キャップ状注
射針原形体の円錐状部を局部的に加熱軟化させ乍ら、Ｉ
Ｆｒ記円配置部の先端を把持して細小な中空針状に変形
するまで減圧伸長させる１５程の初Ｊｆｆ１段階で、葭
記開口部を吸引減圧機能を備えた弁機構で閉塞して中空
部の容積を減少させることに上り円鉗状部の円筒部に近
い個処をラッパ状の絞り部に変形させ、ついで＋ｉｉｆ
記弁機楕弁機引減圧を停止してさらに伸長させ、前記円
錐状部のラッパ状の絞り部に変形した個処に続いて中空
針状に変形させ、かつ冷却して最終の中空針状部を形成
して固化した後、先端部分を切截して注射容器取付用の
開口部を備えた円筒部に連設した中空針部を得るように
したことを特徴とする合成樹脂製注射針の製造法に係る
ものである。This invention was made with attention to the above points, and aims to obtain a new synthetic resin injection needle that is economical and low in cost even if it is disposable. A cap-like syringe needle prototype body with an opening at one end is molded from thermoplastic synthetic resin, and while the opening of the prototype body is closed by a valve mechanism, the conical part is locally heated and softened. , by grasping the tip of the moe-arranged hook-like part and elongating it under reduced pressure, and keeping the volume of the hollow part of the original shape constant, the part of the conical part near the cylindrical part is transformed into a trumpet-shaped constricted part. Further, following the constriction part, the tube is elongated and deformed into a small hollow needle shape, and after cooling to form the final hollow needle part and solidifying it, the tip part is cut off to form an opening for attaching an injection container. The method of manufacturing a synthetic resin injection needle is characterized in that a hollow needle part is connected to a cylindrical part with A syringe needle prototype is molded from a thermoplastic synthetic resin, and the conical part of the cap-shaped syringe needle prototype is locally heated and softened. At the initial stage of the process of elongating under reduced pressure until the conical part is deformed into The conical part is deformed into a constricted part, and then the opening is opened to further expand the conical part, and the part of the conical part that has been deformed into a trumpet-like constricted part is subsequently deformed into a hollow needle shape, and cooled to form the final product. A composition characterized in that after forming and solidifying a hollow needle-like part, the tip part is cut off to form a hollow needle part 11 connected to a cylindrical part provided with an opening for attaching an injection container. The method for manufacturing a resin injection needle includes: molding a cap-shaped injection needle prototype with a cylindrical portion and a conical portion and having an opening at one end from a thermoplastic synthetic resin; While locally heating and softening the shaped part, I
Grasp the tip of the circular arrangement part and stretch it under reduced pressure until it deforms into a small hollow needle. At the first Jff stage of about 15 minutes, the hollow part is closed by a valve mechanism equipped with a suction and decompression function. In order to reduce the volume of
The elliptical valve machine is further expanded by stopping the evacuation pressure, and the part of the conical part that has been deformed into a trumpet-shaped constricted part is subsequently deformed into a hollow needle shape, and is cooled to form the final hollow needle shape. 1. A synthetic resin injection needle characterized in that after forming and solidifying a part, the tip part is cut to obtain a hollow needle part connected to a cylindrical part provided with an opening for attaching an injection container. This relates to the manufacturing method.
また、この発明は円筒状部および円錐状部より成る一端
を開口部とした熱可塑性合成樹脂製キャップ状注射針原
形体の前記円筒状部を支持固定する支持金型機構と、こ
の支持金型機構の下側に、前記円錐状部を局部的に加熱
できるヒータを内蔵した開閉可動金型機構と、前記円錐
状部の先端を把持する把持機構と、Ｉ）η北門筒状部の
開口部を開閉できる弁機構とより成ることを特徴とする
合成樹脂製注射針の製造装置に係り、さらに弁機構は、
必要に応じて吸引減圧機構を備えて成ることを特徴とす
るものである。The present invention also provides a support mold mechanism for supporting and fixing the cylindrical part of a thermoplastic synthetic resin cap-shaped hypodermic needle prototype having an opening at one end, which is composed of a cylindrical part and a conical part, and the support mold mechanism. On the lower side of the An apparatus for manufacturing a synthetic resin injection needle characterized by comprising a valve mechanism that can be opened and closed, further comprising:
It is characterized in that it is equipped with a suction pressure reduction mechanism as required.
（作用）
予め、射出成形操作などで成形された円筒部および円錐
状部より成る合成樹脂製のキャップ状注射針原形体を支
持金型機構で支持した後、開閉可動金型機構のヒータに
より円錐状部のみを部分的に加熱し軟化状態にする。つ
いで、円錐状部の先端を把持機構で把持して伸長させる
が、この伸長操作に先立ち、原形体の開口部を弁機構で
閉塞して伸長させる。この状態では伸長操作で原形体の
中空部の容積が実質的に変化しないで、一定を保持する
ため円錐状部の円筒部に近い個処はラッパ状の絞り部に
変形し、この絞り部に続いて細長な中空針状に伸長して
求める太さの中空針状部を形成できる。(Function) After a synthetic resin cap-shaped syringe needle prototype formed by an injection molding operation or the like is supported by a support mold mechanism, it is shaped into a conical shape by a heater of an open/close movable mold mechanism. Partially heat only the part to soften it. Next, the tip of the conical part is gripped by a gripping mechanism and extended, but prior to this stretching operation, the opening of the original body is closed by a valve mechanism and extended. In this state, the volume of the hollow part of the original shape does not substantially change due to the elongation operation, and in order to maintain a constant volume, the part of the conical part close to the cylindrical part deforms into a trumpet-shaped constricted part, and this conical part Subsequently, a hollow needle-like portion having a desired thickness can be formed by elongating it into an elongated hollow needle-like shape.
なを、前記原形体の開口部を弁機構で閉塞する操作を、
伸長操作の初期段階に限る場合も、原形体の容積は実質
的に変化せず、また、さらに弁機構が吸引減圧操作を行
って原形体の容積を減少させるように慟〈時も前記した
と同様に軟化している円錐状部が、円筒部に近い側で急
激にくびれてラッパ状の絞り部を形成し、中空部の容積
を一定または、僅かに減少しようとする状態に変化する
。The operation of closing the opening of the original body with a valve mechanism,
Even in the initial stage of the elongation operation, the volume of the original body does not substantially change, and the valve mechanism further performs a suction depressurization operation to reduce the volume of the original body. Similarly, the softened conical portion sharply constricts on the side closer to the cylindrical portion to form a trumpet-like constricted portion, and the volume of the hollow portion changes to a constant state or a state in which it tends to decrease slightly.
ついで、開口部の弁機構をその侭の状態に保つか或は、
解放し円錐状部をさらに伸長させれば、円錐状部のラッ
パ状の絞り部に続いて中空針状に伸長し、求める最終太
さの中空針状部を形成できる。The valve mechanism of the opening is then maintained in that position, or
If the conical part is released and the conical part is further expanded, the conical part will expand into a hollow needle following the trumpet-shaped constriction part, thereby forming a hollow needle having the desired final thickness.
つぎに、この伸長固化した中空針状部を斜めに切截して
先端を鋭利な構造とし、茹々に円筒部に連設した中空針
部より成る合成樹脂製注射針を得ることができる。Next, the elongated and solidified hollow needle part is cut diagonally to give a sharp tip structure, thereby obtaining a synthetic resin injection needle consisting of a hollow needle part continuously connected to the cylindrical part.
〔実施例）
以下に、このこの発明の幾多の実施例を図面と共に説明
する。[Embodiments] A number of embodiments of this invention will be described below with reference to the drawings.
各図において、１はポリカーボネートのような熱可塑性
合成樹脂製のキャップ状注射３Ｆ原形体で、円筒部２右
よび円錐状部３より成り、一端を開口部４とした中空部
５を備える。６は開口部４の外周に形成される鍔部であ
る。In each figure, 1 is a cap-shaped injection molded body 3F made of thermoplastic synthetic resin such as polycarbonate, which is composed of a cylindrical portion 2 on the right side and a conical portion 3, and has a hollow portion 5 with an opening 4 at one end. 6 is a flange formed on the outer periphery of the opening 4.
フは、製造装ｆｆ１Ａの支持金型機構を示し、前記原形
体１を固定支持できる透孔部８を穿ち、原形体１の鍔部
６を前記透孔部８の係止溝９に係止して吊下できる構成
となっており、原形体１の円筒部２を保持できるように
なっている。１０は前記支持金型機構７のＦ部に連設さ
れる開１！１可動金型機栖を示し、ヒータ１１が二段、
三段など必要数に埋設されており、かつ、中央で二つ割
れ構造となって左右方向に可動して金型開閉ができるよ
うになっている。そして、二つ割れの金型の内面には、
前記原形体１の円錐状部３を間隙を保って非接触に位置
する二つ割れの円錐状孔１２が穿たれている。１３は前
記ヒータ１１を挟んで金型ｌＡ楕１０内に設けられるエ
アーギャップ、１４は同じく前記ヒータ１１を制御させ
るための温度センサーである。ff shows the support mold mechanism of manufacturing equipment ff1A, in which a through hole 8 that can fixedly support the original form 1 is bored, and the flange 6 of the original form 1 is locked in the locking groove 9 of the through hole 8. It has a configuration that allows it to be suspended, and the cylindrical portion 2 of the original body 1 can be held. Reference numeral 10 indicates an open 1!1 movable mold machine which is connected to the F part of the support mold mechanism 7, and has a heater 11 in two stages;
They are buried in the required number of stages, such as three levels, and are split into two in the center, allowing them to move left and right to open and close the mold. And, on the inside of the mold that is split into two,
A two-part conical hole 12 is bored in the conical part 3 of the original body 1 so as to maintain a gap therebetween and not to be in contact with each other. 13 is an air gap provided in the mold lA ellipse 10 with the heater 11 in between, and 14 is a temperature sensor for controlling the heater 11.
そして、第１図、第２図に示すように、支持金型機構７
と開閉可動金型機構１０とには多数の原形体１を配設し
て同時に多数に原形体１を熱処理して操作できるように
連続して透孔部８および円鐘状孔１２が穿フである。１
５は、原形体１の開口部４を開閉制御するためのブを機
構を示し、後述するように種々変化に富んだ機能、構成
の下に原形体１内の中空部５の容積を制御して適正な注
射針の成形に役立たせることができるようになっている
。Then, as shown in FIGS. 1 and 2, the support mold mechanism 7
The opening/closing movable mold mechanism 10 is provided with a large number of prototype bodies 1, and a through-hole portion 8 and a bell-shaped hole 12 are continuously bored therein so that a large number of prototype bodies 1 can be heat-treated and operated simultaneously. It is. 1
5 shows a mechanism for controlling the opening and closing of the opening 4 of the original body 1, which controls the volume of the hollow part 5 in the original body 1 with various functions and configurations as will be described later. This makes it possible to use this method to form appropriate injection needles.
１６は把持機構を示し、把持部１７で原形体１の円錐状
部３の先端３ａを挟持して下向きに伸長できる働きを奏
する。Reference numeral 16 indicates a gripping mechanism, and the gripping portion 17 has the function of gripping the tip 3a of the conical portion 3 of the original body 1 and allowing it to extend downward.
なを、図に於て、符号１８は支持金型機構７に設けられ
る冷却流体流通用の冷却孔で、吊−Ｆ支持している原形
体ｌの円筒部２が不必要に加熱されることを防ぐ働きを
呈する。In the figure, reference numeral 18 is a cooling hole for circulating cooling fluid provided in the support mold mechanism 7, which prevents unnecessary heating of the cylindrical portion 2 of the prototype body 1 supported by the hanging-F. It works to prevent
叙上の基本的な構成に基づいて図面第１図および第２図
に示す基本的な実施例についてその作用を説明する。The operation of the basic embodiment shown in FIGS. 1 and 2 will be explained based on the basic configuration described above.
予め射出成形装置で成形された合成樹脂注射針原形体１
を図示のように製造装置Ａの透孔部８内に吊下配設して
原形体１の開口部４をｆｆＲ１ａ１５で閉塞し、開閉可
動金型機構１０のヒータ１１を発熱させて円錐状孔１３
を加熱し、原形体ｌの円錐状部３を局部的に加熱する。Synthetic resin injection needle prototype body 1 pre-molded with an injection molding device
is suspended in the through hole 8 of the manufacturing apparatus A as shown in the figure, the opening 4 of the original body 1 is closed with ffR1a15, and the heater 11 of the movable mold mechanism 10 is made to generate heat to open the conical hole. 13
is heated to locally heat the conical part 3 of the original body l.
また、把持機４ｇ１６は、その把１．１部１７が〃；Ｌ
形体１の円錐状部３の先端３ａを把持し、前記開閉金型
機構１０を第２図のように、外方に開いた状態にしてか
ら下方に伸長させる。In addition, the gripper 4g16 has its grip 1.1 part 17
The tip 3a of the conical portion 3 of the body 1 is grasped and the opening/closing mold mechanism 10 is opened outward as shown in FIG. 2, and then extended downward.
既にヒータ１１で十分加熱されて軟化状態になっている
円錐状部３は、把持機構１６の強ル１的な減圧）降操作
によって第２図のように変形するが、円錐状部３の円筒
部２に近い個処は、中？と部５の容積が変らない減圧状
態を呈するのて、ラッパ状の絞り部Ｐを形成し、この絞
り部Ｐに続いて細小な中空針状部Ｑか変形形成される。The conical part 3, which has already been sufficiently heated by the heater 11 and is in a softened state, is deformed as shown in FIG. The place closest to part 2 is middle school? A trumpet-shaped constricted portion P is formed under a reduced pressure state in which the volume of the end portion 5 remains unchanged, and a small hollow needle-like portion Q is deformed and formed following this constricted portion P.
ところでこの実施例では、弁機構１５か原形体！の開口
部４を常時閉じているので、中空部５の容積も、円錐状
部３の形状が変形しても減圧効果のため原則的には同一
であり、しかも、中空３１状部Ｑは、把持機構１６の下
降伸長■が増加すればする程、中空部５の容積は−・定
であるためにその太さは小さくなる。By the way, in this embodiment, the valve mechanism 15 is the original body! Since the opening 4 of the conical part 3 is always closed, the volume of the hollow part 5 is basically the same even if the shape of the conical part 3 is deformed due to the decompression effect. As the downward extension (2) of the gripping mechanism 16 increases, the volume of the hollow portion 5 is constant -, so the thickness thereof becomes smaller.
しかも、把持機構１６の把持伸長量が増えることは軟化
した円錐状部３の樹Ｊ脂の組成配列を揃えて一定方向に
補強整列させることとなり、樹脂組織を強化させること
となるので細い中空針状部Ｑの針としての機能をより向
上できるという効果がある。Moreover, as the amount of gripping extension of the gripping mechanism 16 increases, the compositional arrangement of the resin J in the softened conical part 3 is aligned, reinforced and aligned in a certain direction, and the resin structure is strengthened. This has the effect of further improving the function of the shaped part Q as a needle.
このように、求める太さの中空針状部Ｑが得られた状態
で、変形加工された絞り部Ｐおよび中空針状部Ｑは放熱
固化する。そして、所望のカッターを用いて、中空針状
部Ｑを所望の長さでナイフェツジ状に斜め方向に切截し
て針先端部Ｒを作り、ここに最終製品Ｓを得るものであ
る。In this way, with the hollow needle-like part Q having the desired thickness obtained, the deformed drawn part P and the hollow needle-like part Q are solidified by heat radiation. Then, using a desired cutter, the hollow needle-like part Q is cut diagonally in a knife-like manner to a desired length to form a needle tip R, thereby obtaining a final product S.
なを、カッターによる斜め方向の切截に関しては、針先
端部Ｒをより鋭利にするため、中央が膨出した樽型の研
磨ローラを用いて、切截面を稍々内側にえぐった状態に
形成することもできる。Regarding diagonal cutting with a cutter, in order to make the needle tip R sharper, a barrel-shaped polishing roller with a bulge in the center is used to form the cutting surface slightly inward. You can also.
つぎに、第５図（ａ）〜（ｄ）についてこの発明の第二
の実施例を説明する。Next, a second embodiment of the present invention will be described with reference to FIGS. 5(a) to 5(d).
この実施例の基本的構成は、ＩＷ記実施例と同一である
のでその説明の詳細は省く。前記実施例との相異点は、
弁機構１５の操作が稍々異なるたけである。The basic configuration of this embodiment is the same as that of the embodiment described in IW, so detailed explanation thereof will be omitted. The difference from the above embodiment is as follows:
The only difference is that the operation of the valve mechanism 15 is slightly different.
すなわち、この実施例では、把持機構１６により円錐状
部３の先端３ａを把持伸長させる減圧伸長操作を最初の
僅かな伸長時期の段階までに限って弁機構１５による原
形体１の開口部４の閉塞を行い、絞り部Ｐおよび中空針
状部Ｑの初期的形状Ｐ＋、Ｑ＋が１１１られた時点すな
わち、第５図（ｂ）の時点で弁機構１５を開いて第５図
（Ｃ）の状態Ｐ２．Ｑ２に変形し、引続いて把持機構１
６による大気圧伸長を行わせるようにしたものであって
、爾後１）９記実施例と同様に冷却固化および切截処理
によって求める合成樹脂製注射針Ｓを得ることができる
。That is, in this embodiment, the holding mechanism 16 holds and extends the distal end 3a of the conical portion 3 under reduced pressure and is limited to the first slight elongation stage, and the valve mechanism 15 closes the opening 4 of the original body 1. When the initial shapes P+ and Q+ of the constricted part P and the hollow needle-like part Q are 111 after the occlusion is performed, that is, at the time shown in FIG. 5(b), the valve mechanism 15 is opened to obtain the state shown in FIG. 5(C). P2. Deforms into Q2, and then gripping mechanism 1
After that, the desired synthetic resin injection needle S can be obtained by cooling, solidifying and cutting in the same manner as in Example 1) and 9.
つぎに、第６図（ａ）〜（ｄ）について、この発明の他
の実施例について説明する。Next, other embodiments of the present invention will be described with reference to FIGS. 6(a) to 6(d).
この実施例も、前記第一実施例と比較して相異している
点は弁機４１＃１５の構成と作用だけである。This embodiment also differs from the first embodiment only in the structure and operation of the valve machine 41#15.
したがって、１前記実施例と同様または相当する構成に
ついては、重複を避けるためその説明の詳細は省く。Therefore, the detailed description of the configurations similar to or equivalent to those in the first embodiment will be omitted to avoid duplication.
この実施例では、原形体１の開口部４を常時閉塞してい
る弁機構１５に透孔１５ａを穿った吸引減圧機能を備え
させ、開閉可動金型機構１０のヒータ１１による加熱に
よって原形体１の円錐状部３が軟化変形するまで中空部
５内の空気を吸引して減圧状態を保持させている。（第
６図（ｂ）参照）
したがって、加熱軟化された円錐状部３は、円筒部２に
近い個処で急激にくびれたラッパ状の絞り部ＰＩを形成
し、そわに続いて棒状の細大管部ＱＩを形成するもので
ある。In this embodiment, the valve mechanism 15 that always closes the opening 4 of the original mold body 1 is provided with a suction depressurization function through a through hole 15a, and the original mold body is heated by the heater 11 of the opening/closing movable mold mechanism 10. The air in the hollow part 5 is sucked to maintain a reduced pressure state until the conical part 3 softens and deforms. (See FIG. 6(b)) Therefore, the heated and softened conical portion 3 forms a trumpet-shaped constriction portion PI that is sharply constricted near the cylindrical portion 2, and then a rod-like narrow portion PI. This forms the large pipe portion QI.
この状態で、弁機構１５は、その透孔１５ａを閉じ、把
持機構１６が、その把持部１７で前記円錐状部３の先端
３ａを把持しく第６図（ｃ）参照）、開閉可動金型機構
１０を開いて第６図（ｄ）のように減圧伸長操作を行え
ば第２図に示す第一実施例と同様に絞り部Ｐと中空針状
部Ｑとがきわめて簡単に形成でき、カッターによる切截
処理によって前記したと同様の求める合成樹脂製注射針
Ｓを得ることができる。In this state, the valve mechanism 15 closes its through hole 15a, and the gripping mechanism 16 grips the tip 3a of the conical part 3 with its gripping part 17 (see FIG. 6(c)). If the mechanism 10 is opened and the elongation operation is performed under reduced pressure as shown in FIG. The desired synthetic resin injection needle S similar to that described above can be obtained by the cutting process.
第７図（ａ）、（ｂ）および（ｃ）について、この発明
の他の実施例を説明する。Another embodiment of the present invention will be described with reference to FIGS. 7(a), (b) and (c).
この実施例は、前記第６図に示す実施例と基本的に同一
である。両者が相異する点は、吸引機能付の弁機構１５
において、吸引減圧操作の後、前者が実質的に透孔１５
ａを閉塞して減圧伸長を行わせたのに対し、後者すなわ
ち、この実施例では、透孔１５ａを開いて大気開放の下
に伸長操作を行わせるようにしただけである。This embodiment is basically the same as the embodiment shown in FIG. 6 above. The difference between the two is the valve mechanism 15 with a suction function.
After the suction depressurization operation, the former is substantially closed to the through hole 15.
In contrast to the case where the elongation under reduced pressure was performed by closing the hole 15a, in the latter case, that is, in this embodiment, the elongation operation was performed by opening the through hole 15a and opening it to the atmosphere.
すなわち、この実施例の第７図（ａ）、（ｂ）は第６図
の（ａ）、（ｂ）と同一であり、この実施例の第７図（
ｃ）は、第５図の（Ｃ）、（ｄ）と実質的に同一である
。That is, FIGS. 7(a) and (b) of this embodiment are the same as FIGS. 6(a) and (b), and FIG.
c) is substantially the same as (C) and (d) in FIG.
したがって、この実施例で得られる合成樹脂製注射針Ｓ
は前述の各実施例で１？Ｊられるものと実質的に相異す
るものではない。Therefore, the synthetic resin injection needle S obtained in this example
is 1 in each of the above embodiments? It is not substantially different from that described in J.
以上、幾多の実施例を示したが、この発明は上述の実施
例に限定されるものでなく、熱可塑性合成樹脂で成形さ
れるキャップ状注射針原形体１の成形手段は勿論のこと
、この原形体１を支持し、円錐状部３を加熱軟化伸長さ
せる手段も亦、その構成は自由に選定できる。そして、
要は、円筒部２に対し急激に形状が変化するラッパ状の
絞り部Ｐおよび中空針状部Ｑが、求める注射針として実
用に供することができる大きさと太さであれば、如何な
る形状でも良い。Although a number of embodiments have been shown above, the present invention is not limited to the above-mentioned embodiments, and the present invention is not limited to the above-mentioned embodiments. The structure of the means for supporting the shape 1 and for heating, softening and elongating the conical portion 3 can also be freely selected. and,
In short, the trumpet-shaped constricted part P and the hollow needle part Q, whose shape changes rapidly with respect to the cylindrical part 2, may have any shape as long as they have a size and thickness that can be practically used as the desired injection needle. .
（発明の効果）
この発明は、叙上のように、従来の樹脂と金属針との組
み合せと接着剤を用いて得られる注射針を、合成樹脂の
みによる代用単一製品として完成し、その製造法も部分
的な加熱伸長と弁機構を用いた減圧手段によるきわめて
簡単な方法であるので安価に、しかも量産性を以って提
供でき、ことに使い捨てに好適な注射針を提供できる。(Effects of the Invention) As described above, the present invention has completed the injection needle obtained by using the conventional combination of resin and metal needle and adhesive as a single product made only of synthetic resin, and manufactured the same. This method is also an extremely simple method that involves partial heating and elongation and decompression means using a valve mechanism, so it can be provided at low cost and with mass production, and in particular, it can provide injection needles that are suitable for disposable use.
第１図および第２図は、この発明に係る合成樹脂製注射
針の製造装置の一実施例を示すそれぞれ異なる製造工程
を表わした一部切欠斜面図、第３図は同上装置で得られ
る生成品の縦断面図、第４図は合成樹Ｊｌｒｆ製注射針
の完成品の縦断面図、第５図（ａ）、（ｂ）、（Ｃ）お
よび（ｄ）は、この発明の他の実施例を示す製造装置の
それぞれ異なる製造工程を表わした縦断面図、第６図（
ａ）、（ｂ）、（ｃ）および（ｄ）は、さらにこの発明
の他の実施例を示す製造装置のそれぞれ異なる製造■稈
を表わした縦断面図、第７図（ａ）、（ｂ）および（Ｃ
）は、なをさらにこの発明の他の実施例を示す製造装置
のそれぞれ異なる製造工程を表わした縦断面図、第８図
は従来の注射針の縦断面図である。
キャップ状注射針原形体
７−−−−製造装置Ａの支持金型機構
０−−−−−開閉可動金型機構
１−−−−ヒータ
５−−−−−弁機構
６−−−−−杷持機構
Ｐ・・・−絞り部
Ｑ・・・・・・中空針状部
Ｒ・−・−針先端部FIGS. 1 and 2 are partially cutaway perspective views showing different manufacturing steps of an embodiment of the apparatus for manufacturing synthetic resin injection needles according to the present invention, and FIG. FIG. 4 is a vertical cross-sectional view of a completed injection needle made of synthetic resin Jlrf, and FIGS. FIG.
a), (b), (c) and (d) are longitudinal cross-sectional views showing different manufacturing culms of a manufacturing apparatus showing other embodiments of the present invention, and FIGS. ) and (C
) is a vertical cross-sectional view showing different manufacturing steps of a manufacturing apparatus according to another embodiment of the present invention, and FIG. 8 is a vertical cross-sectional view of a conventional injection needle. Cap-shaped injection needle prototype 7----Support mold mechanism of manufacturing apparatus A 0----Opening/closing movable mold mechanism 1----Heater 5----Valve mechanism 6---- Loquat Holding mechanism P...-Aperture part Q...Hollow needle-like part R--Needle tip
Claims (5)
たキャップ状注射針原形体を熱可塑性合成樹脂で成形し
、該原形体の開口部を弁機構で閉塞した状態で、円錐状
部を局部的に加熱軟化させ乍ら、前記円錐状部の先端を
把持して減圧伸長させ、前記原形体の中空部の容積を一
定に保持することにより円錐状部の円筒部に近い個処を
ラッパ状の絞り部に変形させ、さらに該絞り部に続いて
細小な中空針状に伸長変形させ、かつ冷却して最終の中
空針状部を形成して固化した後、先端部分を切截して注
射容器取付用の開口部を備えた円筒部に連設した中空針
部を得るようにしたことを特徴とする合成樹脂製注射針
の製造法。(1) A cap-shaped syringe needle prototype body consisting of a cylindrical part and a conical part with an opening at one end is molded from thermoplastic synthetic resin, and with the opening of the prototype body closed by a valve mechanism, the conical part is closed. While locally heating and softening, the tip of the conical part is gripped and stretched under reduced pressure, and by keeping the volume of the hollow part of the original body constant, the part of the conical part close to the cylindrical part is wrapped. It is deformed into a shaped constricted part, and then elongated and deformed into a small hollow needle shape following the constricted part, and after being cooled and solidified to form the final hollow needle part, the tip part is cut off. 1. A method for manufacturing a synthetic resin injection needle, characterized in that a hollow needle part is provided in series with a cylindrical part provided with an opening for attaching an injection container.
たキャップ状注射針原形体を熱可塑性合成樹脂で成形し
、該キャップ状注射針原形体の円錐状部を局部的に加熱
軟化させ乍ら、前記円錐状部の先端を把持して細小な中
空針状に変形するまで減圧伸長させる過程の初期段階で
、前記開口部を弁機構で閉塞して中空部の容積を一定に
保持することにより、円錐状部の円筒部に近い個処をラ
ッパ状の絞り部に変形させ、ついで前記開口部を開放し
てさらに伸長させて、前記円錐状部のラッパ状の絞り部
に変形した個処に続いて中空針状に変形させ、かつ冷却
して最終の中空針状部を形成して固化した後、先端部分
を切截して注射容器取付用の開口部を備えた円筒部に連
設した中空針部を得るようにしたことを特徴とする合成
樹脂製注射針の製造法。(2) A cap-shaped syringe needle prototype consisting of a cylindrical portion and a conical portion with one end as an opening is molded from thermoplastic synthetic resin, and the conical portion of the cap-shaped syringe needle prototype is locally heated and softened. In the initial stage of the process of gripping the tip of the conical part and elongating it under reduced pressure until it deforms into a small hollow needle shape, the opening part is closed with a valve mechanism to maintain a constant volume of the hollow part. , the part of the conical part close to the cylindrical part is transformed into a trumpet-shaped constriction part, and then the opening part is opened and expanded further, and the part of the conical part that is transformed into the trumpet-shaped constriction part is Subsequently, it was deformed into a hollow needle shape, and after cooling to form and solidify the final hollow needle-like part, the tip part was cut off and connected to a cylindrical part provided with an opening for attaching an injection container. A method for manufacturing a synthetic resin injection needle, characterized in that a hollow needle portion is obtained.
たキャップ状注射針原形体を熱可塑性合成樹脂で成形し
、該キャップ状注射針原形体の円錐状部を局部的に加熱
軟化させ乍ら、前記円錐状部の先端を把持して細小な中
空針状に変形するまで減圧伸長させる過程の初期段階で
、前記開口部を吸引減圧機能を備えた弁機構で閉塞して
中空部の容積を減少させることにより円錐状部の円筒部
に近い個処をラッパ状の絞り部に変形させ、ついで前記
弁機構の吸引減圧を停止してさらに伸長させ、前記円錐
状部のラッパ状の絞り部に変形した個処に続いて中空針
状に変形させ、かつ冷却して最終の中空針状部を形成し
て固化した後、先端部分を切截して注射容器取付用の開
口部を備えた円筒部に連設した中空針部を得るようにし
たことを特徴とする合成樹脂製注射針の製造法。(3) A cap-shaped syringe needle prototype consisting of a cylindrical portion and a conical portion with one end as an opening is molded from thermoplastic synthetic resin, and the conical portion of the cap-shaped syringe needle prototype is locally heated and softened. In the initial stage of the process of gripping the tip of the conical part and elongating it under reduced pressure until it is deformed into a small hollow needle shape, the opening is closed with a valve mechanism equipped with a suction and decompression function to reduce the volume of the hollow part. By reducing the pressure, the part of the conical part close to the cylindrical part is transformed into a trumpet-shaped constriction part, and then the suction depressurization of the valve mechanism is stopped and further expanded, so that the part of the conical part close to the cylindrical part is transformed into a trumpet-shaped constriction part. The deformed part is then deformed into a hollow needle shape, and after cooling to form the final hollow needle part and solidifying it, the tip is cut off to form a cylinder with an opening for attaching an injection container. 1. A method for manufacturing a synthetic resin injection needle, characterized in that a hollow needle part is provided in series with the needle part.
した熱可塑性合成樹脂製キャップ状注射針原形体の前記
円筒状部を支持固定する支持金型機構と、この支持金型
機構の下側に、前記円錐状部を局部的に加熱できるヒー
タを内蔵した開閉可動金型機構と、前記円錐状部の先端
を把持する把持機構と、前記円筒状部の開口部を開閉で
きる弁機構とより成ることを特徴とする合成樹脂製注射
針の製造装置。(4) A support mold mechanism that supports and fixes the cylindrical part of the thermoplastic synthetic resin cap-shaped hypodermic needle prototype whose one end is an opening and is made up of a cylindrical part and a conical part; A movable opening/closing mold mechanism having a built-in heater that can locally heat the conical part, a gripping mechanism that grips the tip of the conical part, and a valve mechanism that can open and close the opening of the cylindrical part. An apparatus for manufacturing a synthetic resin injection needle, characterized by comprising:
とする請求項４記載の合成樹脂製注射針の製造装置。(5) The apparatus for manufacturing a synthetic resin injection needle according to claim 4, wherein the valve mechanism includes a suction and pressure reduction mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63329020A JPH02174855A (en) | 1988-12-28 | 1988-12-28 | Method and apparatus for preparing injection needle made of synthetic resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63329020A JPH02174855A (en) | 1988-12-28 | 1988-12-28 | Method and apparatus for preparing injection needle made of synthetic resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02174855A true JPH02174855A (en) | 1990-07-06 |
| JPH0360511B2 JPH0360511B2 (en) | 1991-09-13 |
Family
ID=18216699
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63329020A Granted JPH02174855A (en) | 1988-12-28 | 1988-12-28 | Method and apparatus for preparing injection needle made of synthetic resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02174855A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006516453A (en) * | 2003-01-29 | 2006-07-06 | ベクトン・ディキンソン・アンド・カンパニー | Retractor needle assembly for syringe |
-
1988
- 1988-12-28 JP JP63329020A patent/JPH02174855A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006516453A (en) * | 2003-01-29 | 2006-07-06 | ベクトン・ディキンソン・アンド・カンパニー | Retractor needle assembly for syringe |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0360511B2 (en) | 1991-09-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3335669A2 (en) | Preformed support device and method and apparatus for manufacturing the same | |
| CN1034315A (en) | Ballon catheter | |
| JP3062309B2 (en) | Biaxially stretchable synthetic resin piece for forming inner bottle, method for forming inner / outer double bottle, and inner / outer double bottle | |
| JPH0622891B2 (en) | Apparatus and method for heat setting thermoplastic tubes | |
| CN1160133C (en) | Flashless catheter beveling process | |
| JPH02174855A (en) | Method and apparatus for preparing injection needle made of synthetic resin | |
| JP2011079243A (en) | Blow molding method of flat container | |
| JPH0232966A (en) | Vessel and packing for vessel and manufacture thereof | |
| WO2000018648A1 (en) | Apparatus and method for molding a container and including a vibrating knife assembly | |
| JPS62273823A (en) | Manufacture of transfusion vessel and molding equipment thereof | |
| JPH11188779A (en) | Method for injection stretching blow molding | |
| JPH04131221A (en) | Manufacture of vessel with tongue piece for suspension | |
| JPH03158222A (en) | Container with hanging grip and manufacture thereof | |
| JP2817437B2 (en) | Blow molding method | |
| JPH02248232A (en) | Production of vessel fitted with tongue piece for hanging | |
| JPH04336237A (en) | Container fitted with hanger and manufacture thereof | |
| WO1992021508A1 (en) | Method of forming a jet on a plastic tube blank | |
| US20030039798A1 (en) | Preform for making a prosthetic limb socket | |
| JPH04140119A (en) | Label feeding device of resin molder | |
| JPH081765A (en) | Method and apparatus for thermoforming crystalline resin sheet | |
| JPS637927A (en) | Manufacture of vessel having minimum diameter part | |
| JPH07172852A (en) | Producing device for glass tube | |
| JPH0357623A (en) | Manufacture of liquid container by hollow holding | |
| JPH06506410A (en) | Container made of stretchable plastic material and method for manufacturing the same | |
| JPS59184628A (en) | Orientation blow molding method |