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JPH02266191A - Joining method for plastic pipe - Google Patents

Joining method for plastic pipe

Info

Publication number
JPH02266191A
JPH02266191A JP1085125A JP8512589A JPH02266191A JP H02266191 A JPH02266191 A JP H02266191A JP 1085125 A JP1085125 A JP 1085125A JP 8512589 A JP8512589 A JP 8512589A JP H02266191 A JPH02266191 A JP H02266191A
Authority
JP
Japan
Prior art keywords
pipe
plastic
resins
tube
pipes
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
JP1085125A
Other languages
Japanese (ja)
Inventor
Junsuke Kyomen
京免　純輔
Ryuichi Yoneda
隆一 米田
Kazutaka Takada
高田　和孝
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.)
Kubota Corp
Original Assignee
Kubota Corp
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 Kubota Corp filed Critical Kubota Corp
Priority to JP1085125A priority Critical patent/JPH02266191A/en
Publication of JPH02266191A publication Critical patent/JPH02266191A/en
Pending legal-status Critical Current

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
    • 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
    • B29C66/32—Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/324—Avoiding burr formation
    • 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
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • 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
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • 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
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
    • B29C66/723—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being multi-layered
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/914—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux
    • B29C66/9141—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature
    • B29C66/91411—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by controlling or regulating the temperature, the heat or the thermal flux by controlling or regulating the temperature of the parts to be joined, e.g. the joining process taking the temperature of the parts to be joined into account
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/91—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux
    • B29C66/919—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges
    • B29C66/9192—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams
    • B29C66/91921—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature
    • B29C66/91931—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux characterised by specific temperature, heat or thermal flux values or ranges in explicit relation to another variable, e.g. temperature diagrams in explicit relation to another temperature, e.g. to the softening temperature or softening point, to the thermal degradation temperature or to the ambient temperature in explicit relation to the fusion temperature or melting point of the material of one of the parts to be joined
    • 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
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Plasma & Fusion (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To prevent the occurrence of a bead or the like to a pipe inner surface by forming each end of plastic pipes to be butted, while pressing the pipe ends heated up to a melting temperature in the opposite direction, and melting and binding them together. CONSTITUTION:Each pipe end 2 of plastic pipes 1 is cut into a taper form so as to project a pipe inner surface side 3 in a tube axial direction (arrow x). These ends are heated up to a melting temperature and then these ends are pressed to the opposite direction with each other and welded together. As for the plastic pipe, it may be formed into a double-layer pipe structure consisting of resins unpolluting a high purity fluid such as polyether, ether ketone, fluoro resin or the like and other resins good in compatibility with these resins on a pipe outer surface and excellent in strength. Consequently, when pipe connection takes place, resign projection to the pipe inner surface is preventable to the utmost, so that it is suitable for connection of transfer pipes of the high purity fluid.

Description

【発明の詳細な説明】 〔産業−１−の利用分野〕 この発明はプラスチック管の接合方法に関し、詳しくは
主として純水などの高純度液体の移送管に適したプラス
チック管又はプラスチック製継手などの接合方法に関す
る。[Detailed Description of the Invention] [Field of Application in Industry-1-] The present invention relates to a method for joining plastic pipes, and more particularly, the present invention relates to a method for joining plastic pipes, and more particularly, to a method for joining plastic pipes or plastic joints suitable for transferring high-purity liquids such as pure water. Regarding the joining method.

〔従来の技術〕[Conventional technology]

従来、純水などの高純度液体の移送用プラスチック管は
液体の滞留し得る内面段部を出来るだけ無くず要請が有
り、このため、この押管の接合に際しては、通常の管の
ような、受口、挿口より成る継手、あるいは、フランジ
継手等よりも直接プラスチック管同志をつき合わせて溶
着する接続が採用されることが多い。Conventionally, plastic pipes for transferring high-purity liquids such as pure water have been required to have as few internal steps as possible where liquid can accumulate, and for this reason, when joining these push pipes, it has been necessary to Connections in which plastic pipes are directly brought together and welded together are often used rather than joints consisting of sockets, sockets, or flange joints.

〔従来技術の問題点〕[Problems with conventional technology]

ところで、プラスチック管を溶着接合する場合、第６図
（イ）に示すように切断した管端Ａ、八へ志を加熱し、
直接突き合わせると、押圧力（矢印Ｆ）に起因して、溶
融樹脂がはみ出ず、いわゆるビードＢの発生が有り、こ
れが液体の滞留を生じさせることとなって、不都合が生
じることが有る。By the way, when joining plastic pipes by welding, heat the cut pipe ends A and 8 as shown in Figure 6 (a).
If they are brought into direct contact, the molten resin will not protrude due to the pressing force (arrow F), and a so-called bead B will occur, which may cause liquid to stagnate, causing problems.

さらに、内部流体のｌη損防止のため、第６図（ロ）に
示すように、内層Ａ１を高純度プラスチック、外層Ａ２
を通常のプラスチックとした二層管とすることがあるが
、この場合、外層部分Ａ２のプラスチックが管内面Ｄヘ
ビードＢ′となって突出することがあり、このようなこ
とがあるとビードＢ′そのものによって内部流体の汚染
も生しる不都合が有る。Furthermore, in order to prevent lη loss of the internal fluid, as shown in Figure 6 (b), the inner layer A1 is made of high purity plastic, and the outer layer A2 is
A two-layer pipe is sometimes made of ordinary plastic, but in this case, the plastic of the outer layer portion A2 may protrude as a heavy bead B' on the inner surface of the pipe, and if this happens, the bead B' This has the disadvantage that it also causes contamination of the internal fluid.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

この発明は、上記問題点に鑑み、単層のプラスチック管
ないしは、二層プラスチック管を接続する場合、管内面
へのビードの発生、及び、外層樹脂の管内面への突出を
防止し得るプラスチック管の接合方法を提供することを
目的としてなされたものである。In view of the above-mentioned problems, the present invention provides a plastic tube that can prevent the formation of beads on the inner surface of the tube and the protrusion of the outer layer resin onto the inner surface of the tube when connecting single-layer plastic tubes or double-layer plastic tubes. The purpose of this work was to provide a method for joining.

〔課題を解決するに至った技術〕[Technology that led to solving the problem]

即ち、この発明のプラスチック管の接合方法は互いにつ
き合わされるプラスチック管の管端部を、管内面側が管
軸方向に突出するように切削し、溶融温度にまで加熱し
た両管端部を互いに対向方向へ押圧して熔融接着するこ
とを特徴とするものである。That is, in the method of joining plastic tubes of the present invention, the ends of the plastic tubes that are to be brought together are cut so that the inner surfaces of the tubes protrude in the tube axis direction, and the two tube ends, which have been heated to a melting temperature, are placed facing each other. It is characterized by being melted and bonded by pressing in the direction.

〔実施例〕〔Example〕

次に、この発明の詳細な説明する。 Next, the present invention will be explained in detail.

第１図はこの発明の実施例の断面図、第２図は溶着後の
断面図、第３図は他の実施例の断面図、第４図は溶着後
の断面図である。FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is a sectional view after welding, FIG. 3 is a sectional view of another embodiment, and FIG. 4 is a sectional view after welding.

この発明のプラスチック管の接合方法は互いにつき合わ
されるプラスチック管１の管端部２を、管内面側３が管
軸方向（矢印Ｘ）へ突出するようテーバ状に切削し、こ
の端部を溶融温度にまで加熱後、互いに対向方向へ押圧
し、第２図に示す、十うに溶着するのである。In the joining method of plastic tubes of the present invention, the tube ends 2 of the plastic tubes 1 that are brought into contact with each other are cut into a tapered shape so that the tube inner surface 3 protrudes in the tube axis direction (arrow X), and the ends are melted. After heating to a certain temperature, they are pressed in opposite directions and welded together as shown in FIG.

上記実施例として、管端２をテーバ状に切削した場合を
示したが、第３図に示すように階段状に切削しても良い
。In the above embodiment, the pipe end 2 is cut into a tapered shape, but it may be cut into a stepped shape as shown in FIG.

また、この場合、プラスチック管として第４図に示した
ように、管内面１Ａを例えばポリエーテルエーテルケＩ
・ン、フッ素樹脂など高純度流体を汚染しない樹脂、管
外面ＩＢを前記樹脂と相溶性が良く、かつ、強度に優れ
る樹脂とした二層管構造としても良い。In this case, as shown in FIG. 4 as a plastic pipe, the inner surface 1A of the pipe is made of polyether ether
- A two-layer tube structure may be used in which a resin such as a fluororesin that does not contaminate high-purity fluids is used, and the outer surface IB of the tube is made of a resin that has good compatibility with the resin and has excellent strength.

また、上記プラスチック管１は、実質的にプラスチック
で形成された管状体を意味し、従って、図示のような直
管状のものの他エルボなどプラスチック継手の接続にも
同様に実施できる。Furthermore, the plastic pipe 1 refers to a tubular body substantially made of plastic, and therefore, it can be similarly applied to a straight pipe as shown in the figure as well as a plastic joint such as an elbow.

〔作用〕[Effect]

この発明において、端部を加熱したプラスチック管１を
互いに押圧した場合、第５図（イ）にしめずように管内
面側から接着が始まり、そこから外面方向へと接着が進
む。In this invention, when the plastic tubes 1 whose ends are heated are pressed against each other, adhesion starts from the inner surface of the tube and progresses from there toward the outer surface, as shown in FIG. 5(a).

従って、押圧に伴い発生ずるビードＢは常に外面方向へ
と突出し、管内面への突出が防止される。Therefore, the bead B generated by pressing always protrudes toward the outer surface and is prevented from protruding toward the inner surface of the tube.

また、端部を階段状に形成した場合も同様であるが、二
層管とした場合、第５図（ロ）に示すように最初に内層
ＩＡ同志が接着してしまうので、外層１８部分の樹脂が
管内面へと突出するのは完全に防止される。従って、外
層樹脂による汚染のおそれは全く無い。The same is true when the end portions are formed in a step-like shape, but when a two-layer pipe is used, the inner layer IA adheres to each other first, as shown in FIG. The resin is completely prevented from protruding into the inner surface of the tube. Therefore, there is no risk of contamination due to the outer layer resin.

〔効果〕〔effect〕

この発明は以上説明したように、管接合する場合、管内
面への樹脂突出が、極力防止でき、二層管にあっては、
外層樹脂の管内面への突出が確実に防止できるので、高
純度流体の移送管の接続に好適であると言った効果を有
する。As explained above, this invention can prevent resin protrusion onto the inner surface of the tube as much as possible when joining the tubes, and in the case of double-layered tubes,
Since it is possible to reliably prevent the outer layer resin from protruding into the inner surface of the tube, it has the effect of being suitable for connecting a transfer tube for high-purity fluid.

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

Claims (1)

【特許請求の範囲】[Claims] （１）互いにつき合わされるプラスチック管の管端部を
、管内面側が管軸方向に突出するように形成し、溶融温
度にまで加熱した両管端部を互いに対向方向へ押圧して
溶融接着することを特徴とするプラスチック管の接合方
法。(1) The ends of the plastic tubes that are brought together are formed so that the inner surface of the tubes protrudes in the direction of the tube axis, and both tube ends heated to melting temperature are pressed in opposite directions to melt and bond them. A method for joining plastic pipes, characterized by:
JP1085125A 1989-04-03 1989-04-03 Joining method for plastic pipe Pending JPH02266191A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1085125A JPH02266191A (en) 1989-04-03 1989-04-03 Joining method for plastic pipe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1085125A JPH02266191A (en) 1989-04-03 1989-04-03 Joining method for plastic pipe

Publications (1)

Publication Number Publication Date
JPH02266191A true JPH02266191A (en) 1990-10-30

Family

ID=13849921

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1085125A Pending JPH02266191A (en) 1989-04-03 1989-04-03 Joining method for plastic pipe

Country Status (1)

Country Link
JP (1) JPH02266191A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE43288E1 (en) 2001-11-26 2012-04-03 Emerson Electric Co. High purity fluid delivery system
CN112936871A (en) * 2021-01-26 2021-06-11 陈志英 Hot-melting connection method for polyethylene plastic pipes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
USRE43288E1 (en) 2001-11-26 2012-04-03 Emerson Electric Co. High purity fluid delivery system
CN112936871A (en) * 2021-01-26 2021-06-11 陈志英 Hot-melting connection method for polyethylene plastic pipes

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