JPH07100919A - Processing of end part of pipe material - Google Patents

Processing of end part of pipe material

Info

Publication number
JPH07100919A
JPH07100919A JP24688393A JP24688393A JPH07100919A JP H07100919 A JPH07100919 A JP H07100919A JP 24688393 A JP24688393 A JP 24688393A JP 24688393 A JP24688393 A JP 24688393A JP H07100919 A JPH07100919 A JP H07100919A
Authority
JP
Japan
Prior art keywords
pipe material
end portion
molding
mold
molding die
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.)
Pending
Application number
JP24688393A
Other languages
Japanese (ja)
Inventor
Ichiro Arai
一郎 荒井
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shinko Kagaku KK
Original Assignee
Shinko Kagaku KK
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shinko Kagaku KK filed Critical Shinko Kagaku KK
Priority to JP24688393A priority Critical patent/JPH07100919A/en
Publication of JPH07100919A publication Critical patent/JPH07100919A/en
Pending legal-status Critical Current

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  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

PURPOSE:To simultaneously mold the end part of a pipe material and the hole or recessed part of the top part of the pipe material. CONSTITUTION:The end part P1 of a pipe material P is heated and melted to be molded by a mold consisting of an end part mold and a top part mold. The end part P1 of the pipe material P is formed into a protruding shape by the end part mold and a hole Pa or a recessed part Pb is formed to the end part P1 by the top part mold.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】この発明は、熱可塑性のパイプ材
の端部を用途に応じた所定の形状に成形するためのパイ
プ材の端部加工方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing an end portion of a pipe material for forming the end portion of a thermoplastic pipe material into a predetermined shape according to the application.

【0002】[0002]

【従来の技術】熱可塑性のパイプ材は、あらゆる工業技
術分野において広く使用されているから、その端部を所
定の形状に成形する技術も、各種の手法が知られてい
る。
2. Description of the Related Art Since thermoplastic pipe materials are widely used in all industrial technical fields, various techniques are known for forming the ends of the pipe material into a predetermined shape.

【0003】たとえば、パイプ材の端部を所定の形状に
封止するには、凹状の成形部を有する加熱成形型をパイ
プ材の端部に押し付ければよい(特公昭62−3001
9号公報)。なお、このとき、パイプ材または加熱成形
型のいずれか一方を軸方向に回転させ、パイプ材の外形
を整えることも、広く慣用されている所である。
For example, in order to seal the end portion of the pipe material into a predetermined shape, a heat-molding die having a concave molding portion may be pressed against the end portion of the pipe material (Japanese Patent Publication No. 62-3001).
No. 9). At this time, it is also widely used to adjust the outer shape of the pipe material by rotating one of the pipe material and the heat molding die in the axial direction.

【0004】[0004]

【発明が解決しようとする課題】かかる従来技術による
ときは、加熱成形型は、ヒータを内蔵するから、その構
造が複雑であるばかりでなく、給電用の電線を伴うか
ら、成形時の移動が制約される上、ヒータや電線の断線
事故が避けられないという問題があった。また、加熱成
形型は、それをパイプ材に押し付けることによってパイ
プ材の端部を加熱軟化するから、1ショット当りの成形
量(成形型により、材料を変形させるために移動させる
べき材料の量をいう、以下同じ)に限界があり、素材材
料と仕上り製品との形状差によっては、異なる成形型に
よる複数回の成形工程が必要となる場合が少なくなく、
成形工程が複雑になるという問題があった。
According to the prior art described above, since the heat-molding die has a built-in heater, its structure is not only complicated, but it also involves an electric wire for power supply, which makes it difficult to move during molding. In addition to being restricted, there was a problem that an accidental disconnection of the heater or the electric wire could not be avoided. Further, since the heat-molding die heats and softens the end of the pipe material by pressing it against the pipe material, the molding amount per shot (the amount of material to be moved to deform the material by the molding die is However, depending on the difference in shape between the raw material and the finished product, it is often the case that multiple molding processes with different molding dies are required.
There is a problem that the molding process becomes complicated.

【0005】そこで、この発明の目的は、かかる従来技
術の問題に鑑み、パイプ材の端部を加熱溶融し、溶融状
態の端部と頂部とを同時成形することによって、成形型
にヒータを内蔵する必要がなく、全体工程を著るしく単
純化することができるパイプ材の端部加工方法を提供す
ることにある。
In view of the above problems of the prior art, an object of the present invention is to incorporate a heater in a molding die by heating and melting the end portion of a pipe material and simultaneously molding the end portion and the top portion in a molten state. It is an object of the present invention to provide a method for processing an end portion of a pipe material, which is capable of significantly simplifying the entire process without needing to do so.

【0006】[0006]

【課題を解決するための手段】かかる目的を達成するた
めのこの発明の構成は、熱可塑性樹脂からなるパイプ材
の切放しの端部を加熱溶融し、端部成形型と頂部成形型
とを備える成形型を介し、溶融状態のパイプ材の端部と
頂部とを同時成形することをその要旨とする。
The structure of the present invention for attaining the above object is provided with an end forming die and a top forming die by heating and melting the cut end portion of a pipe material made of a thermoplastic resin. The gist of the invention is to simultaneously mold the end portion and the top portion of the molten pipe material through the molding die.

【0007】なお、頂部成形型は、先端が尖った棒材、
または、先端がドーム状の棒材とすることができる。
The top mold is a bar with a sharp tip,
Alternatively, the tip may be a dome-shaped rod.

【0008】また、端部成形型は、分割型としてもよ
い。
The end forming die may be a split die.

【0009】[0009]

【作用】かかる発明の構成によるときは、成形型は、溶
融状態のパイプ材の端部を成形するから、それ自体に
は、加熱用のヒータを内蔵させる必要がなく、また、前
工程における加熱溶融範囲を適切に定めることにより、
任意の成形量を容易に実現することが可能である。ま
た、成形型は、端部成形型と頂部成形型とを備えるか
ら、端部の外形と頂部の外形とを同時に成形し、全体を
一挙に所定の形状に形成することができる。
According to the structure of the present invention, since the molding die molds the end portion of the pipe material in a molten state, it is not necessary to incorporate a heater for heating in the molding die itself, and the heating in the previous step is performed. By setting the melting range appropriately,
It is possible to easily realize an arbitrary molding amount. Further, since the molding die includes the end molding die and the top molding die, the outer shape of the end portion and the outer shape of the top portion can be molded at the same time, and the whole can be formed into a predetermined shape at once.

【0010】なお、ここで、素材材料となるパイプ材P
は、その端部P1 が切放しであり(図1(A))、低密
度ポリエチレン、ポリプロピレン、ポリスチレンなどの
熱可塑性樹脂からなるものとする。
Here, the pipe material P, which is the raw material, is used.
The end portion P1 is cut off (FIG. 1 (A)) and is made of a thermoplastic resin such as low density polyethylene, polypropylene or polystyrene.

【0011】頂部成形型を尖った棒材とするときは、頂
部成形型の先端がパイプ材Pに深く進入し、成形後の端
部P1 の頂部に頂部成形型の径と同径の孔Pa を開口さ
せることができる(同図(B))。ただし、同図の端部
P1 は、端部成形型により、凸状に同時成形されてい
る。
When the top mold is a sharp bar, the tip of the top mold penetrates deeply into the pipe material P, and a hole Pa having the same diameter as the diameter of the top mold is formed at the top of the end P1 after molding. Can be opened ((B) in the same figure). However, the end P1 in the figure is simultaneously formed in a convex shape by the end forming die.

【0012】また、頂部成形型をドーム状の棒材とすれ
ば、頂部成形型の形状に応じて端部P1 の頂部に凹部P
b を形成することができ(同図(C))、凹部Pb を介
して端部P1 を封止することができる。
If the top mold is a dome-shaped rod, a recess P is formed on the top of the end P1 depending on the shape of the top mold.
b can be formed (FIG. 7C), and the end P1 can be sealed via the recess Pb.

【0013】端部成形型を分割型とするときは、端部P
1 の仕上り形状を回転非対称形にすることも可能であ
る。
When the end forming die is a split mold, the end portion P
It is also possible to make the finished shape of 1 rotationally asymmetric.

【0014】[0014]

【実施例】以下、図面を以って実施例を説明する。Embodiments Embodiments will be described below with reference to the drawings.

【0015】パイプ材Pは、まず、切放しの端部P1 を
加熱溶融する(図2)。
In the pipe material P, first, the cut end portion P1 is heated and melted (FIG. 2).

【0016】加熱手段としては、パイプ材Pと同等以上
の径を有する棒状のヒータH1 を使用することができる
(同図(A))。このとき、ヒータH1 は、放射により
パイプ材Pの端部P1 を加熱し、溶融させる。なお、パ
イプ材Pは、端部P1 を均一に加熱溶融させるために、
軸方向に回転させることが好ましい(同図の矢印Kp方
向)。
As the heating means, a rod-shaped heater H1 having a diameter equal to or larger than that of the pipe material P can be used (FIG. 1 (A)). At this time, the heater H1 heats and melts the end P1 of the pipe material P by radiation. In order to heat and melt the end P1 of the pipe material P uniformly,
It is preferably rotated in the axial direction (arrow Kp direction in the figure).

【0017】ヒータH1 に代えて、ホットエアノズルH
2 を使用してもよい(同図(B))。ホットエアノズル
H2 は、ケーシングH2a内にエアガイドH2bを内装して
なり、ケーシングH2aの先端には、パイプ材Pの端部P
1 を挿入し得るエア吹出口H2cが形成されている。ま
た、エアガイドH2bは、エア吹出口H2cの軸上に配設さ
れる円錐台形の部材であって、同図の矢印Ka 方向に供
給されるホットエアをエア吹出口H2cの外周方向にほぼ
均一に分散させることができる。なお、エアガイドH2b
は、ホットエアがパイプ材Pに入り込むことを少なくす
るために、パイプ材Pの内径より僅かに大径とし、加熱
中のパイプ材Pは、その先端をできるだけエアガイドH
2bの下面に近付けることが好ましい。
Instead of the heater H1, a hot air nozzle H
2 may be used ((B) in the figure). The hot air nozzle H2 includes an air guide H2b inside a casing H2a, and an end portion P of the pipe material P is provided at the tip of the casing H2a.
An air outlet H2c into which 1 can be inserted is formed. Further, the air guide H2b is a truncated cone-shaped member arranged on the axis of the air outlet H2c, and the hot air supplied in the direction of the arrow Ka in the figure is made substantially uniform in the outer peripheral direction of the air outlet H2c. It can be dispersed. The air guide H2b
Has a diameter slightly larger than the inner diameter of the pipe material P in order to reduce the amount of hot air entering the pipe material P.
It is preferable to approach the lower surface of 2b.

【0018】加熱手段は、ホットエアを吹出すエアパイ
プH3 、H3 であってもよい(同図(C))。各エアパ
イプH3 は、パイプ材Pの端部P1 に向けて、やや上向
きにホットエアを吹き出し、ホットエアがパイプ材Pに
入り込むことがないように、その配設方向を定めるもの
とする。また、エアパイプH3 は、パイプ材Pのまわり
に3本以上を配置してもよい。なお、ここでも、加熱中
のパイプ材Pは、軸方向に回転させることが好ましい。
The heating means may be air pipes H3 and H3 for blowing hot air (FIG. 2C). Each air pipe H3 is arranged such that hot air is blown toward the end P1 of the pipe material P in a slightly upward direction so that the hot air does not enter the pipe material P. Further, three or more air pipes H3 may be arranged around the pipe material P. Also here, the pipe material P being heated is preferably rotated in the axial direction.

【0019】端部P1 を加熱溶融したパイプ材Pは、成
形型Mによって成形する(図3)。
The pipe material P in which the end portion P1 is heated and melted is molded by the molding die M (FIG. 3).

【0020】成形型Mは、下部にドーム状の凹部M1aを
有する端部成形型M1 と、端部成形型M1 の軸上に装着
する頂部成形型M2 との組合せからなる。頂部成形型M
2 は、先端が尖った棒材であって、その先端部は、凹部
M1aの頂部に長く突出している。
The mold M comprises a combination of an end mold M1 having a dome-shaped recess M1a at the bottom and a top mold M2 mounted on the shaft of the end mold M1. Top mold M
Reference numeral 2 is a bar material having a sharp tip, and the tip portion of the bar material is projected to the top of the recess M1a.

【0021】パイプ材Pの端部P1 が溶融状態にあると
き、端部P1 を覆うようにして成形型Mをパイプ材Pに
押し付ければ(同図の矢印K1 方向)、パイプ材Pは、
頂部成形型M2 の先端部がパイプ材Pに深く進入すると
ともに、端部P1 が凹部M1aによって凸状に成形され、
図1(B)の形状に一挙に成形することができる。
When the end portion P1 of the pipe material P is in a molten state, the molding die M is pressed against the pipe material P so as to cover the end portion P1 (in the direction of arrow K1 in the figure).
The tip of the top molding die M2 deeply penetrates into the pipe material P, and the end P1 is formed into a convex shape by the recess M1a.
The shape shown in FIG. 1B can be formed all at once.

【0022】なお、成形型Mは、成形完了後、直ちに図
3の矢印K1 方向と逆方向に移動して離型すればよく、
成形中のパイプ材Pも、軸方向に回転させておくのがよ
い(同図の矢印Kp 方向)。
The molding die M may be moved in the direction opposite to the arrow K1 direction in FIG.
The pipe material P being formed is also preferably rotated in the axial direction (arrow Kp direction in the figure).

【0023】端部成形型M1 は、分割型M3 、M3 …と
してもよい(図4(A))。各分割型M3 は、凹部M1a
に相当する凹部M3aと、頂部成形型M2 に対応する溝部
M3bとが形成されている。溶融状態にあるパイプ材Pの
端部P1 に対し、頂部成形型M2 を軸方向に進入させる
とともに(同図の矢印K2a方向)、分割型M3 、M3…
をパイプ材Pの半径方向に駆動し(同図の矢印K3a、K
3a…方向)、全体をパイプ材Pの端部P1 上に密集させ
れば(同図(B))、パイプ材Pは、同様にして、図1
(B)の形状に一挙に成形することができる。
The end molding die M1 may be divided dies M3, M3 ... (FIG. 4 (A)). Each split mold M3 has a recess M1a.
And a groove portion M3b corresponding to the top molding die M2 are formed. The top molding die M2 is axially inserted into the end portion P1 of the pipe material P in a molten state (direction of arrow K2a in the figure), and the split dies M3, M3 ...
Is driven in the radial direction of the pipe material P (arrows K3a, K
3a ... direction), if the whole is densely arranged on the end portion P1 of the pipe material P (FIG. 3B), the pipe material P is made in the same manner as in FIG.
The shape of (B) can be formed all at once.

【0024】なお、分割型M3 、M3 …、頂部成形型M
2 は、成形完了後、図4(C)の矢印K3b、K3b…、K
2b方向に退去させて離型する。ただし、分割型M3 、M
3 …は、2分割以上任意の数に分割し得るものとし、ま
た、各分割型M3 の凹部M3aは、パイプ材Pの頂部P1
を回転非対称形とするために、互いに異なる形状として
もよいものとする。
The split molds M3, M3 ..., Top mold M
2 indicates the arrows K3b, K3b ..., K in FIG.
Move away in 2b direction and release. However, split type M3, M
3 ... can be divided into any number of two or more, and the recess M3a of each split mold M3 has a top P1 of the pipe material P.
May have different shapes in order to make them rotationally asymmetric.

【0025】図3の成形型Mにおいて、頂部成形型M2
は、先端をドーム状に丸めた棒材とし(図5(A))、
端部成形型M1 の凹部M1aに対し、先端を僅かに突出さ
せることができる。
In the mold M of FIG. 3, the top mold M2
Is a bar with the tip rounded into a dome shape (Fig. 5 (A)),
The tip can be slightly protruded with respect to the recess M1a of the end molding die M1.

【0026】端部P1 を加熱溶融したパイプ材Pに対
し、成形型Mを軸方向に押し付けた上(同図の矢印K1
方向)、それを逆方向に離型すれば(同図(B)の矢印
K2 方向)、パイプ材Pは、凹部M1aによる凸状の端部
P1 と、頂部成形型M2 による半球状の凹部Pb とを一
挙に形成することができ(同図(B)、図1(C))、
このとき、パイプ材Pは、凹部Pb を介して端部P1 を
封止することができる。なお、このようにして封止され
たパイプ材Pは、頂部内面に鋭い針B1 を有するキャッ
プBを先端部に装着し(図5(C))、同図の矢印K4
方向にキャップBを押し込むことにより、針B1 を介し
て凹部Pb を押し破り、簡単に開封することができる。
The molding die M is axially pressed against the pipe material P of which the end portion P1 is heated and melted (arrow K1 in the figure).
Direction), and releasing it in the opposite direction (in the direction of arrow K2 in the same figure (B)), the pipe material P has a convex end P1 formed by the recess M1a and a hemispherical recess Pb formed by the top molding die M2. And can be formed all at once (FIG. 1B, FIG. 1C),
At this time, the pipe material P can seal the end P1 through the recess Pb. In the pipe material P thus sealed, a cap B having a sharp needle B1 on the inner surface of the top is attached to the tip portion (FIG. 5 (C)), and an arrow K4 in FIG.
By pushing the cap B in the direction, the recess Pb can be pushed through the needle B1 and the package can be easily opened.

【0027】以上のように、この発明は、図2(A)な
いし(C)のいずれかによる加熱溶融工程と、図3ない
し図5のいずれかによる成形工程との2工程からなり、
パイプ材Pの端部P1 を所定形状に一挙に成形すること
ができるのみならず、孔Paを介して端部P1 の頂部を
開口させ、または、凹部Pb を介して端部P1 の頂部を
封止することができる。そこで、この発明は、成形前の
パイプ材Pを薬液封入口として利用し、成形後のそれを
滴下ノズルや排出ノズルとして利用する目薬容器や浣腸
薬容器等の薬液収容容器に対し、好適に適用することが
できる。
As described above, the present invention comprises the two steps of the heating and melting step according to any of FIGS. 2A to 2C and the molding step according to any of FIGS.
Not only can the end P1 of the pipe material P be formed into a predetermined shape all at once, but the top of the end P1 can be opened via the hole Pa, or the top of the end P1 can be sealed via the recess Pb. You can stop. Therefore, the present invention is preferably applied to a drug solution container such as an eye drop container or an enema drug container that uses the pipe material P before molding as a drug solution inlet and uses it after molding as a dropping nozzle or a discharge nozzle. can do.

【0028】なお、この発明による加熱溶融工程、成形
工程は、同一のパイプ材Pの端部P1 に対し、複数回繰
り返してもよい。このとき、先きの成形工程は予備成形
工程とし、後の成形工程は仕上成形工程とし、両者は、
図3ないし図5のいずれかであって、互いに同一であっ
てもよく、また、異なっていてもよい。ただし、端部P
1 を封止するときは、図5の成形工程を繰り返せばよ
い。
The heating and melting step and the forming step according to the present invention may be repeated a plurality of times for the end P1 of the same pipe material P. At this time, the former molding step is a preforming step, the latter molding step is a finish molding step, and both are
It may be any of FIGS. 3 to 5, and may be the same as or different from each other. However, the end P
When 1 is sealed, the molding process of FIG. 5 may be repeated.

【0029】[0029]

【発明の効果】以上説明したように、この発明によれ
ば、パイプ材の切放しの端部を加熱溶融し、溶融状態の
パイプ材の端部と頂部とを同時成形することによって、
成形型は、既に溶融状態にあるパイプ材を成形対象とす
るから、格別な加熱用のヒータを内蔵させる必要が全く
ない上、加熱溶融範囲を適切に定めることにより、1シ
ョット当りの成形量を十分多くすることができるから、
単一の成形型による1回の成形工程で済み、全体工程を
著るしく単純化することができるという優れた効果があ
る。
As described above, according to the present invention, the cut end portion of the pipe material is heated and melted, and the end portion and the top portion of the melted pipe material are simultaneously formed,
Since the molding die targets the pipe material that is already in a molten state, there is no need to incorporate a special heater for heating, and the amount of molding per shot can be reduced by appropriately setting the heating and melting range. Because you can do enough,
There is an excellent effect that only one molding step using a single molding die is required, and the whole process can be significantly simplified.

【図面の簡単な説明】[Brief description of drawings]

【図1】 成形前後の各断面図1] Cross-sectional views before and after molding

【図2】 加熱溶融工程説明図FIG. 2 is an explanatory diagram of a heating and melting process

【図3】 成形工程説明図(1)[FIG. 3] Molding process explanatory diagram (1)

【図4】 成形工程説明図(2)FIG. 4 Explanatory drawing of molding process (2)

【図5】 成形工程説明図(3)FIG. 5 Explanatory drawing of molding process (3)

【符号の説明】[Explanation of symbols]

P…パイプ材 P1 …端部 M…成形型 M1 …端部成形型 M2 …頂部成形型 M3 …分割型 P ... Pipe material P1 ... End M ... Mold M1 ... End mold M2 ... Top mold M3 ... Split mold

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】 熱可塑性樹脂からなるパイプ材の切放し
の端部を加熱溶融し、端部成形型と頂部成形型とを備え
る成形型を介し、溶融状態のパイプ材の端部と頂部とを
同時成形することを特徴とするパイプ材の端部加工方
法。
1. An end portion and a top portion of a pipe material in a molten state are melted by heating and melting a cut end portion of a pipe material made of a thermoplastic resin, and passing the end portion and the top portion of a molten pipe material through a forming die including an end forming die and a top forming die. A method for processing an end portion of a pipe material, characterized by simultaneous molding.
【請求項2】 前記頂部成形型は、先端が尖った棒材で
あることを特徴とする請求項1記載のパイプ材の端部加
工方法。
2. The method for processing an end portion of a pipe material according to claim 1, wherein the top mold is a bar material having a sharp tip.
【請求項3】 前記頂部成形型は、先端がドーム状の棒
材であることを特徴とする請求項1記載のパイプ材の端
部加工方法。
3. The method for processing an end portion of a pipe material according to claim 1, wherein the top molding die is a rod material having a dome-shaped tip.
【請求項4】 前記端部成形型は、分割型とすることを
特徴とする請求項1ないし請求項3のいずれか記載のパ
イプ材の端部加工方法。
4. The method for processing an end portion of a pipe material according to claim 1, wherein the end forming die is a split die.
JP24688393A 1993-10-01 1993-10-01 Processing of end part of pipe material Pending JPH07100919A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP24688393A JPH07100919A (en) 1993-10-01 1993-10-01 Processing of end part of pipe material

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP24688393A JPH07100919A (en) 1993-10-01 1993-10-01 Processing of end part of pipe material

Publications (1)

Publication Number Publication Date
JPH07100919A true JPH07100919A (en) 1995-04-18

Family

ID=17155165

Family Applications (1)

Application Number Title Priority Date Filing Date
JP24688393A Pending JPH07100919A (en) 1993-10-01 1993-10-01 Processing of end part of pipe material

Country Status (1)

Country Link
JP (1) JPH07100919A (en)

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