JPH0655430B2 - Bending method of partition pipe - Google Patents
Bending method of partition pipeInfo
- Publication number
- JPH0655430B2 JPH0655430B2 JP12294186A JP12294186A JPH0655430B2 JP H0655430 B2 JPH0655430 B2 JP H0655430B2 JP 12294186 A JP12294186 A JP 12294186A JP 12294186 A JP12294186 A JP 12294186A JP H0655430 B2 JPH0655430 B2 JP H0655430B2
- Authority
- JP
- Japan
- Prior art keywords
- partition
- pipe
- tube
- mold
- curvature
- 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
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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/02—Bending or folding
- B29C53/08—Bending or folding of tubes or other profiled members
- B29C53/083—Bending or folding of tubes or other profiled members bending longitudinally, i.e. modifying the curvature of the tube axis
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2024/00—Articles with hollow walls
- B29L2024/006—Articles with hollow walls multi-channelled
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、仕切付管の湾曲方法に関する。TECHNICAL FIELD The present invention relates to a method for bending a partition tube.
配線用保護管として、第７図（イ），（ロ）に示すよう
に、管Ａ内部に、一又は二以上の仕切壁Ｂ，Ｂを設け、
この仕切壁Ｂ，Ｂで仕切られた空間内にケーブルＣ等を
配設することが行なわれる。As a wiring protection tube, as shown in FIGS. 7 (a) and 7 (b), one or more partition walls B, B are provided inside the tube A.
The cables C and the like are arranged in the space partitioned by the partition walls B and B.
ところで、上記仕切付管を布設する場合、管路を曲折す
る必要が往々にしてあるが、内部に一文字、又は十文字
状の仕切壁を有する曲管は、外周を形成する管壁部と仕
切壁との力学的相関が複雑なため、一体成形や二次加工
成形が非常に困難であり、長尺の滑らかな曲管を成形す
るのは、殆ど実用化出来ないといった問題が有った。従
ってかかる曲折管路を布設する場合は、押出成形可能な
短尺の曲管を多数接続せざるを得ず、部品点数の増大、
施工の煩雑さを有効に解消し得ない問題があった。By the way, when laying the above-mentioned partition pipe, it is often necessary to bend the pipe line, but a curved pipe having a partition wall in the shape of a letter or a cross in the interior is a pipe wall and a partition wall forming the outer periphery. Since the mechanical correlation with and is complicated, it is very difficult to perform integral molding and secondary processing molding, and there has been a problem that molding a long smooth curved pipe can hardly be put to practical use. Therefore, when laying such a bent pipe, there is no choice but to connect a large number of short bendable pipes that can be extruded, increasing the number of parts,
There was a problem that the complexity of construction could not be effectively eliminated.
この発明は、上記問題点に鑑み、仕切付管であっても、
長尺かつ所望曲率の曲管を容易に成形し得る仕切付管の
湾曲方法を得ることを目的としてなされたものである。In view of the above problems, the present invention is a partition pipe,
The purpose of the present invention is to obtain a method for bending a partition tube that can easily form a long curved tube having a desired curvature.
即ち、この発明の仕切付管の湾曲方法はプラスチック製
の仕切付直管を加熱軟化した後、該仕切付管内の夫々の
中空部にチューブ状のゴム芯を挿入し、次いで該仕切付
管を、所望の曲率半径の曲管二次成形用金型であって、
曲率中心に対する円周面に沿って二分割可能な金型内に
収め、前記チューブ状ゴム芯内に圧縮空気を送入しつ
つ、金型を前記円周面の半径方向へ圧縮し、冷却するこ
とを特徴とするものである。That is, the bending method of the partition pipe of the present invention is to heat and soften a plastic straight partition pipe, insert a tubular rubber core into each hollow portion in the partition pipe, and then to divide the partition pipe. , A mold for secondary molding of a curved pipe having a desired radius of curvature,
It is housed in a mold that can be divided into two parts along the circumferential surface with respect to the center of curvature, and while compressing air is fed into the tubular rubber core, the mold is compressed in the radial direction of the circumferential surface and cooled. It is characterized by that.
次に、この発明を実施例により説明する。 Next, the present invention will be described with reference to examples.
第１図〜第４図は、この発明の工程を示す斜視図であ
る。1 to 4 are perspective views showing the steps of the present invention.
この発明の仕切付管の湾曲方法は、プラスチック製とさ
れた内部仕切付直管１を例えば、高温のポリエチレング
リコール液へ浸漬などにより全体を均一に加熱して軟化
させ、この加熱直管１の夫々の中空部１０，１０内に、
第２図に示すようにチューブ状ゴム芯２，２を挿入し、
次いで、この仕切付管１を第３図に示すように、所望の
曲率半径の曲管二次成形用金型３Ａ，３Ｂであって曲率
中心Ｏに対する円周面Ｓに沿って二分割可能とされた金
型３Ａ，３Ｂ内に収め、チューブ状ゴム芯２，２内に空
気プラグ２Ｂ、２Ｂより圧縮空気Ｐを送入し、第４図に
示すように金型を円周分割面Ｓの半径方向（矢印Ｒ）へ
圧縮し、次いで冷却する工程より構成されている。In the method for bending a partition tube according to the present invention, the internal partition straight tube 1 made of plastic is uniformly heated and softened by, for example, dipping in a high-temperature polyethylene glycol solution to soften the heated straight tube 1. In each hollow part 10,10,
Insert the tube-shaped rubber cores 2 and 2 as shown in FIG.
Next, as shown in FIG. 3, the partition pipe 1 can be divided into two along the circumferential surface S with respect to the center of curvature O by using the curved pipe secondary molding dies 3A, 3B having a desired radius of curvature. The compressed rubber P is sent from the air plugs 2B and 2B into the tubular rubber cores 2 and 2, and the mold is placed on the circumferential dividing surface S as shown in FIG. It comprises the steps of compressing in the radial direction (arrow R) and then cooling.
なお冷却後脱型の際はチューブ状ゴム芯２内の空気を減
圧し引き抜く。When demolding after cooling, the air inside the tubular rubber core 2 is depressurized and withdrawn.
上記において、チューブ状ゴム芯２は第５図（イ）に示
すように、断面形状が仕切付管１の仕切空間に合致する
形状とされ、内部には、第５図（イ），（ロ）に示すよ
うに中空部２Ａが設けられている。なお、図中２Ｃ・・
・２Ｃはチューブ状ゴム芯の操作用支持片である。In the above description, the tubular rubber core 2 has a cross-sectional shape that matches the partition space of the partition tube 1, as shown in FIG. 2) A hollow portion 2A is provided. 2C ...
2C is a supporting piece for operation of a tubular rubber core.
上記実施例として、内部が一文字状仕切壁により二つに
仕切られた管を示したが、第６図に示すように十文字状
の仕切壁により四つに仕切られた管１、さらにはそれ以
上に仕切られた管であっても同様に実施出来る。As the above-mentioned embodiment, a pipe whose inside is divided into two by a one-character partition wall is shown. However, as shown in FIG. 6, the pipe 1 is divided into four by a cross-shaped partition wall, and further more. The same can be done with a pipe partitioned into two.
この発明において、加熱軟化した仕切付管１の仕切空間
部内には、夫々、自由に湾曲曲折可能なチューブ状ゴム
芯２，２が挿入されているため、金型より曲げ力が加わ
った際、仕切付管１は金型３、３に沿ってスムースに湾
曲変形していく。この時、チューブ芯ゴム２、２内に圧
縮空気により加圧されているためこれが仕切壁両面から
支えることになり、曲げ力が加わっても仕切壁にしわ等
の変形の発生の防止が図られる。In this invention, since the tube-shaped rubber cores 2 and 2 which can be freely bent and bent are inserted into the partition space portions of the partition tube 1 which has been softened by heating, when a bending force is applied from the mold, The partition tube 1 is smoothly curved and deformed along the molds 3, 3. At this time, since the tube core rubbers 2 and 2 are pressurized by compressed air, they are supported from both sides of the partition wall, and even if bending force is applied, deformation of the partition wall such as wrinkles can be prevented. .
さらに、加熱軟化したプラスチックの可塑性により経時
的に内部応力も緩和されていくので、滑らかな、曲管を
成形出来るのである。Furthermore, since the plasticity of the plastic softened by heating also relaxes the internal stress over time, a smooth curved pipe can be molded.
また、仕切付管１に曲げ力を加える場合、割金型３Ａ、
３Ｂを合わせる方向へ押圧すれば良いので湾曲成形も容
易である。In addition, when a bending force is applied to the partition tube 1, the split mold 3A,
Since it suffices to press the 3B in the direction in which they are aligned with each other, the curve forming is easy.
この発明は、以上説明したように、押出成形等によって
成形した仕切付直管を、内部の仕切壁の存在にも係わら
ず変形を生じることなく湾曲することが可能となり、ま
た実施に際しても所望の長さ、曲率とされた割金型と、
仕切付管の仕切空間に等しい断面図形状のチューブ状ゴ
ム芯さえ用意しておけば良く、実施が容易である等の効
果を有する。INDUSTRIAL APPLICABILITY As described above, the present invention makes it possible to curve a straight pipe with partition formed by extrusion molding or the like without causing deformation regardless of the presence of an internal partition wall. Split mold with length and curvature,
It is only necessary to prepare a tubular rubber core having a cross-sectional shape equal to the partition space of the partition tube, which has effects such as easy implementation.
第１図〜第５図は、この発明の工程説明図、第６図は、
他の実施例の説明図、第７図は、従来例の説明図であ
る。1 to 5 are process explanatory diagrams of the present invention, and FIG. 6 is
FIG. 7 is an explanatory diagram of another embodiment, and FIG. 7 is an explanatory diagram of a conventional example.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 須賀 良平 大阪府堺市石津北町64番地 久保田鉄工株 式会社ビニルパイプ工場内 (72)発明者 西村 昌和 大阪府堺市石津北町64番地 久保田鉄工株 式会社ビニルパイプ工場内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Ryohei Suga, 64 Ishizukita-cho, Sakai City, Osaka Prefecture, inside the vinyl pipe factory of Kubota Iron Works Co., Ltd. (72) Masakazu Nishimura 64, Ishizukita-machi, Sakai City, Osaka Kubota Iron Works Co. Company vinyl pipe factory
Claims (1)
た後、該仕切付管内の夫々の中空部にチューブ状のゴム
芯を挿入し、次いで該仕切付管を、所望の曲率半径の曲
管二次成形用金型であって、曲率中心に対する円周面に
沿って二分割可能な金型内に収め、前記チューブ状ゴム
芯内に圧縮空気を送入しつつ金型を前記円周面の半径方
向へ圧縮し、冷却することを特徴とする仕切付管の湾曲
方法。1. A plastic partition straight pipe is softened by heating, a tubular rubber core is inserted into each hollow portion in the partition pipe, and then the partition pipe is bent with a desired radius of curvature. A mold for secondary molding of a pipe, which is housed in a mold that can be divided into two along a circumferential surface with respect to a center of curvature, and the mold is surrounded by the compressed rubber while feeding compressed air into the tubular rubber core. A method of bending a partition tube, which comprises compressing in a radial direction of a surface and cooling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12294186A JPH0655430B2 (en) | 1986-05-28 | 1986-05-28 | Bending method of partition pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12294186A JPH0655430B2 (en) | 1986-05-28 | 1986-05-28 | Bending method of partition pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62279919A JPS62279919A (en) | 1987-12-04 |
| JPH0655430B2 true JPH0655430B2 (en) | 1994-07-27 |
Family
ID=14848403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12294186A Expired - Lifetime JPH0655430B2 (en) | 1986-05-28 | 1986-05-28 | Bending method of partition pipe |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0655430B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4109370A1 (en) * | 1990-05-23 | 1992-09-24 | Fraunhofer Ges Forschung | DEVICE FOR DEFORMING WORKPIECES FROM THERMOPLASTIC PLASTICS |
| DE102007051674A1 (en) * | 2007-10-26 | 2009-04-30 | Rehau Ag + Co. | Method for deforming pipes |
-
1986
- 1986-05-28 JP JP12294186A patent/JPH0655430B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62279919A (en) | 1987-12-04 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| EXPY | Cancellation because of completion of term |