JPH03186690A - Microwave-heated fusion joints for thermoplastic pipes - Google Patents

Microwave-heated fusion joints for thermoplastic pipes

Info

Publication number
JPH03186690A
JPH03186690A JP1325261A JP32526189A JPH03186690A JP H03186690 A JPH03186690 A JP H03186690A JP 1325261 A JP1325261 A JP 1325261A JP 32526189 A JP32526189 A JP 32526189A JP H03186690 A JPH03186690 A JP H03186690A
Authority
JP
Japan
Prior art keywords
thermoplastic
pipes
annular core
joint
pipe
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
JP1325261A
Other languages
Japanese (ja)
Inventor
Koichi Kitao
北尾　幸市
Nozomi Mitsusaka
三坂　望
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.)
JFE Engineering Corp
Original Assignee
NKK Corp
Nippon Kokan Ltd
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 NKK Corp, Nippon Kokan Ltd filed Critical NKK Corp
Priority to JP1325261A priority Critical patent/JPH03186690A/en
Publication of JPH03186690A publication Critical patent/JPH03186690A/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
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1425—Microwave radiation
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • B29C65/3604—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint
    • B29C65/3608—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements
    • B29C65/3612—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction characterised by the type of elements heated by induction which remain in the joint comprising single particles, e.g. fillers or discontinuous fibre-reinforcements comprising fillers
    • 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
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap 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
    • B29C66/01—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
    • B29C66/50—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
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • 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
    • B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0855—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using microwave
    • 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
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1477—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier
    • B29C65/148—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier placed at the interface
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3472—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint
    • B29C65/3476—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic
    • B29C65/348—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the composition of the heated elements which remain in the joint being metallic with a polymer coating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12—Thermoplastic materials

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】 ［産業上の利用分野］ この発明は、熱可塑性プラスチック管用のマイクロ波加
熱式融着継手に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] This invention relates to a microwave-heated fusion joint for thermoplastic pipes.

［従来の技術］ 従来の技術の一例として特開昭６４−７４３８１号公報
に以下に述べる提案がある。第２［］は、］開開昭６４
−７４３８１公報の提案の実施例の断面図である。第２
図（１）は、接合完了前の状態を示す、第２図（２〉は
、接合完了後の状態を示す、管４５．４６は合成樹脂製
であり、その端部４５ａ、４６ａは継手本体４７の端部
４７ａ。[Prior Art] As an example of the conventional technology, there is a proposal described below in Japanese Patent Laid-Open No. 74381/1981. The second [] is] Kaikai 64th year
It is a sectional view of an example of a proposal of the -74381 gazette. Second
Figure (1) shows the state before the joint is completed. Figure 2 (2) shows the state after the joint is completed. The pipes 45 and 46 are made of synthetic resin, and the ends 45a and 46a are the joint body. 47 end 47a.

４７ｂ内に部分的に嵌合する。管４５．４６および継手
本体４７は、ポリオレフィン系熱可塑性合成樹脂製であ
る。管４５．４６の端部４５ａ。47b. The pipes 45, 46 and the joint body 47 are made of polyolefin thermoplastic synthetic resin. End 45a of tube 45.46.

４６ａ接触面である外周面と、継手本体４７の端部４７
ａ、４７ｂの接触面である内周面との間には、炭素繊維
等の層４８が層状に介在する。この炭素繊維等の層４８
は、継手本体４７の軸方向全長に亘って、周方向全面に
亘って介在する。この炭素繊維等の層４８は、継手本体
４７の内周面に取り付けられている。＃１手本体４７は
加熱されることによって、半径方向に収縮して端部４７
ａ。46a the outer peripheral surface which is the contact surface and the end 47 of the joint body 47
A layer 48 of carbon fiber or the like is interposed in a layered manner between the contact surface of a and the inner peripheral surface of 47b. This layer 48 of carbon fiber etc.
is interposed over the entire axial length of the joint body 47 and over the entire circumferential surface. This layer 48 of carbon fiber or the like is attached to the inner peripheral surface of the joint body 47. When the #1 hand body 47 is heated, it contracts in the radial direction and the end portion 47
a.

４７ｂが管４５．４６の端部４５ａ、４６ａを半径方向
内方に押圧するように収縮する残留歪が付与されている
。４１は電源である。A residual strain is applied such that 47b contracts so as to press ends 45a, 46a of tubes 45, 46 radially inward. 41 is a power source.

炭素繊維等の層４８の端部には接合作業時に端子部材４
９．４０接触されて、電気的に接続される。A terminal member 4 is attached to the end of the layer 48 of carbon fiber etc. during the joining operation.
9.40 Contacted and electrically connected.

炭素繊維等の層４８が電力付勢されてジュール熱が発生
する事によって、継手本体４７の端部４７ａ、４７ｂの
内周面と管４５．４６の端部４５ａ、４６ａの少なくと
も外周面とが加熱されて軟化、溶融し、炭素繊維等の層
４８内にこれらの合成樹脂が入りこんでゆく、これによ
って第４図（２）で示されるように、管４５．４６を継
手本体４７を介して強固に接続する事ができる。When the layer 48 of carbon fiber or the like is energized and Joule heat is generated, the inner circumferential surfaces of the ends 47a, 47b of the joint body 47 and at least the outer circumferential surfaces of the ends 45a, 46a of the tubes 45, 46 are heated. These synthetic resins are heated, softened and melted, and penetrate into the layer 48 of carbon fibers, etc. As a result, as shown in FIG. A strong connection can be made.

しかし、炭素繊維等の層４８が電力付勢されてジュール
熱が均一に発生する様に炭素繊維等を、均一に分配する
事が困難であり、更に端子部材４９．４０に接触する圧
力を均一にする事は困難である。また炭素繊維等の層４
８は電気抵抗が高過ぎるので、炭素繊維を大量に加える
必要があり、その結果継手の強度が低下する。However, it is difficult to uniformly distribute the carbon fiber, etc. so that the layer 48 of carbon fiber, etc. is energized with electric power and generates Joule heat uniformly, and furthermore, it is difficult to uniformly distribute the carbon fiber, etc., so that the layer 48 that contacts the terminal member 49, 40 is uniformly heated. It is difficult to do so. Also layer 4 of carbon fiber etc.
Since the electrical resistance of No. 8 is too high, it is necessary to add a large amount of carbon fiber, resulting in a decrease in the strength of the joint.

従来の技術の他の一例として、特公昭６１−４１２９３
号公報に以下に述べる提案がある。第３図は、特公昭６
１−４１２９３号公報の提案の実施例の断面図である０
図において５１は溶接スリーブである。この溶接スリー
ブ５１は熱可塑性合成樹脂製パイプ５２．５２’の接続
に供し、管状本体５３と螺旋コイル５４とで構成する。As another example of the conventional technology, Japanese Patent Publication No. 61-41293
The following proposal is included in the publication. Figure 3 shows the Tokuko Sho 6
0 which is a sectional view of an embodiment of the proposal of Publication No. 1-41293.
In the figure, 51 is a welding sleeve. This welding sleeve 51 is used for connecting a thermoplastic synthetic resin pipe 52, 52' and is composed of a tubular body 53 and a helical coil 54.

コイル５４は抵抗線５５を具え、これを螺旋状に捲き付
けるとともに熱可塑性材料のケーシング５６内に設ける
。抵抗線５５の両端５７を取り出し電源に接続可能とな
っている。コイル５４は管状本体５３より短く、管状本
体５３の両端５８をそれぞれコイル５４から等しい長さ
ずつ突出させる。該両端５８を円錐状として、端縁に向
けて直径が漸減するよう先細りとなっている。The coil 54 comprises a resistance wire 55 which is wound helically and placed within a casing 56 of thermoplastic material. Both ends 57 of the resistance wire 55 can be taken out and connected to a power source. The coil 54 is shorter than the tubular body 53, and both ends 58 of the tubular body 53 protrude from the coil 54 by equal lengths. Both ends 58 are conical and tapered so that the diameter gradually decreases toward the edge.

しかし、抵抗線５５近傍の個所に応力集中が起こり、液
体接触面に最も近い発熱電線と液体接触面との間の僅か
の融着部に割れが生じると液体が発熱電線を伝わり漏れ
出るという障害が発生する。However, if stress concentration occurs near the resistance wire 55 and a crack occurs in the slight fusion bond between the heating wire and the liquid contact surface closest to the liquid contact surface, the liquid may leak through the heating wire. occurs.

［発明が解決しようとする課題］ 第一に加熱用発熱を線を設けることにより次の障害が発
生する。即ち、 （１）発熱電線が管軸に垂直に配置されているので、配
管に力が掛かった際に、発ｐ！！、電線の近傍の個所に
応力集中が起こる。液体接触面に最も近い発熱ＴＬ線と
液体接触面との間の僅かの融着部に割れが生じた際には
液体が発熱電線を伝わり漏れ出るという障害が発生する
。[Problems to be Solved by the Invention] First, the following problems occur when a heating wire is provided. That is, (1) Since the heating wire is arranged perpendicular to the tube axis, when force is applied to the piping, a p! ! , stress concentration occurs near the wire. When a crack occurs in the slight fusion bond between the heating TL wire closest to the liquid contacting surface and the liquid contacting surface, a problem occurs in which liquid leaks out through the heating wire.

（２）　ｍ手の形状が複雑で例えばサドル状等の際は発
熱電線の捲き付けが容易でない。(2) If the shape of the wire is complex, such as a saddle shape, it is not easy to wrap the heating wire around it.

（３）発２８電線の近傍が高温になり樹脂の劣化を招く
。(3) The area near the power line 28 becomes high temperature, leading to deterioration of the resin.

第二に継手の部材全体に導電性の炭素繊維等を混練する
場合には次の困難がある。炭素繊維等は通電性が金属に
くらべて低いので、大量の炭素繊維を加える必要があり
、その結果、継手の強度等が低下する。更に大量の炭素
繊維を均一に混練することは困難である。Secondly, there are the following difficulties when kneading conductive carbon fiber or the like into the entire joint member. Since carbon fibers and the like have lower electrical conductivity than metals, it is necessary to add a large amount of carbon fibers, resulting in a decrease in the strength of the joint. Furthermore, it is difficult to uniformly knead a large amount of carbon fiber.

［課題を解決するための手段］ この発明に係る、熱可塑性のプラスチック管のマイクロ
波加熱式融着継手は、接続される熱可塑性のプラスチッ
ク管の外面に接して設けられ、誘電損失係数が０．１以
上でマイクロ波を照射されて発熱する性質を有して、且
つ融点が１８０℃以上である樹脂を３０％以上６０％以
下を含有した、被接続管体と同材質高分子との混練物か
ら成る円環状のコアと、その外周に密接して嵌着する熱
可塑性のプラスチック製の管状体とを具備してなること
を特徴とする。[Means for Solving the Problems] The microwave heating fusion joint for thermoplastic pipes according to the present invention is provided in contact with the outer surface of the thermoplastic pipes to be connected, and has a dielectric loss coefficient of 0. Kneading of a polymer made of the same material as the pipe to be connected, containing 30% or more and 60% or less of a resin that has the property of generating heat when irradiated with microwaves at a temperature of 1 or more and has a melting point of 180°C or more. It is characterized by comprising an annular core made of solid material and a tubular body made of thermoplastic plastic that is tightly fitted around the outer circumference of the annular core.

［作用］ この発明は上記の様に構成されているので、接続後の継
手部の材質劣化がないので信頼性が高い、更に従来の技
術による継手と較べてこの考案の継手は能率良く製造で
きるので製造原価を低減することが可能である。[Function] Since the present invention is constructed as described above, there is no material deterioration of the joint after connection, resulting in high reliability.Furthermore, the joint of this invention can be manufactured more efficiently than joints made using conventional techniques. Therefore, it is possible to reduce manufacturing costs.

［実施例］ 以下にこの発明を図によって説明する。第１図〈１〉は
この発明の一実施例の断面図である。第１図（２〉はこ
の発明の一実施例の斜視図である０図において、１は誘
電損失係数の高い樹脂を３０％以上６０％以下を含有し
た、被接続管体と同材質高分子との混練物から成る射出
成形により予め成形した円環状のコアである。誘電損失
係数の高い樹脂が、３０％未満では誘電現象による発熱
が不十分であり、６０％を超えると融着後の強度が弱く
なる。且つこの円環状のコアは、融点が１８０℃以上で
ある樹脂を用いる。これにより樹脂の混練及びコア１の
成形を容易にする。又、コア１は誘電損失係数が０．１
以上の性質を有している樹脂、例えば誘電損失係数が０
．１であるナイロン６、及び誘電損失係数が０．２であ
るフェノール樹脂を用いた。２は管の継手の外筒であり
プラスチックの管状体から成っている。４は熱可塑性の
プラスチック管である。継手の外筒２は４と同じ熱可塑
性のプラスチックで出来ている。３は導波管でありマイ
クロ波の線源〈図示せず）から加熱接合室５ヘマイクロ
波を伝える金属製の筒で出来ている。金属製の筒は誘電
損失係数が低く且つマイクロ波を遮蔽する性質がある。[Example] The present invention will be explained below with reference to the drawings. FIG. 1 <1> is a sectional view of one embodiment of the present invention. FIG. 1 (2) is a perspective view of one embodiment of the present invention. In FIG. 0, 1 is a polymer made of the same material as the pipe to be connected, containing 30% to 60% of a resin with a high dielectric loss coefficient. It is an annular core pre-formed by injection molding consisting of a kneaded mixture of resin.If the resin with a high dielectric loss coefficient is less than 30%, heat generation due to the dielectric phenomenon is insufficient, and if it exceeds 60%, it will be difficult to generate heat after fusion. In addition, this annular core uses a resin with a melting point of 180°C or higher.This facilitates kneading of the resin and molding of the core 1.Furthermore, the core 1 has a dielectric loss coefficient of 0. 1
Resins with the above properties, for example, a dielectric loss coefficient of 0
．． Nylon 6 having a dielectric loss coefficient of 0.1 and phenol resin having a dielectric loss coefficient of 0.2 were used. Reference numeral 2 denotes the outer cylinder of the pipe joint, which is made of a plastic tubular body. 4 is a thermoplastic plastic tube. The outer cylinder 2 of the joint is made of the same thermoplastic plastic as 4. A waveguide 3 is made of a metal tube that transmits microwaves from a microwave source (not shown) to the heating bonding chamber 5. A metal tube has a low dielectric loss coefficient and has the property of shielding microwaves.

熱可塑性のプラスチック管４による配管の直径が５０關
φである場合にマイクロ波の線源の電源容量は６００Ｗ
であり、周波数は２４５０　ＭＨ２のものを用いた。加
熱接合室５内でマイクロ波をコア１に照射するとコア１
中の誘電損失係数の大きな樹脂が発熟し高温になり、そ
の近傍の樹脂に伝熱し溶融すると共に、コア１に接する
熱可塑性のプラスチック管４が軟化溶融し始め熱可塑性
のプラスチック管４と継手管２が融着する。When the diameter of the thermoplastic pipe 4 is 50mm, the power capacity of the microwave source is 600W.
The frequency used was 2450 MH2. When the core 1 is irradiated with microwaves in the heating bonding chamber 5, the core 1
The resin with a large dielectric loss coefficient matures and reaches a high temperature, which transfers heat to the resin in the vicinity and melts it, while the thermoplastic plastic tube 4 in contact with the core 1 begins to soften and melt.The thermoplastic plastic tube 4 and the joint tube begin to soften and melt. 2 is fused.

［発明の効果］ この発明の熱可塑性プラスチック管の継手によると、熱
可塑性のプラスチック管の接続の信頼性が高くなり、且
つ継手の形状が複雑である際においても、成形が容易で
ある。[Effects of the Invention] According to the joint for thermoplastic pipes of the present invention, the reliability of the connection of thermoplastic plastic pipes is increased, and even when the shape of the joint is complicated, it is easy to mold.

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

第１図（１）はこの発明の一実施例の断面図、第１図（
２〉はこの発明の一実施例の斜視図、第２図〈１）及び
第２図（２〉は従来の技術の第一の実施例を示す賢所面
図、第３図は従来の技術の第二の実施例を示す賢所面図
である。 １・・・コア、２・・・管の継手の外筒、３・・・導波
管、４・・・熱可塑性のプラスチック管、５・・・加熱
接合室、４０．４９・・・端子部材、４１・・・電源、
４５．４６・・・合成樹脂製の管、 ４５ａ、４６ｂａ・・・合成樹脂製の管の端部、４７・
・・継手本体、４７ａ、４７ｂ・・・継手本体の端部、
４８・・・炭素繊維等の層、５１・・・溶接スリブ、５
２．５２°・・・熱可塑性合成樹脂製パイプ、５３・・
・溶接スリーブの管状本体、５４・・・抵抗線のコイル
、５５・・・抵抗線、５６・・・熱可塑性材料のゲージ
ング、５７・・・抵抗線の両端、５８・・・管状本体の
両端。FIG. 1 (1) is a cross-sectional view of one embodiment of the present invention, and FIG.
2> is a perspective view of one embodiment of the present invention, FIGS. 2(1) and 2(2) are top views showing the first embodiment of the prior art, and FIG. 3 is a perspective view of the first embodiment of the prior art. It is a top view showing a second embodiment. 1... Core, 2... Outer cylinder of pipe joint, 3... Waveguide, 4... Thermoplastic plastic pipe, 5... ... Heating bonding chamber, 40.49 ... Terminal member, 41 ... Power supply,
45.46...Synthetic resin pipe, 45a, 46ba...Synthetic resin pipe end, 47.
... joint body, 47a, 47b... end of joint body,
48... Layer of carbon fiber etc., 51... Welding sleeve, 5
2.52°...Thermoplastic synthetic resin pipe, 53...
- Tubular body of welding sleeve, 54... Coil of resistance wire, 55... Resistance wire, 56... Gauging of thermoplastic material, 57... Both ends of resistance wire, 58... Both ends of tubular body .

Claims (2)

【特許請求の範囲】[Claims] （１）プラスチック管の融着継手において、接続される
熱可塑性プラスチック管の外面に接して設けられ、マイ
クロ波を照射すると発熱する性質を有する無機物、有機
物等を含有し、被接続管体と同材質高分子との混合物か
ら成る円環状のコアと、その外周に密接して嵌着する熱
可塑性プラスチック製の管状体とを具備してなることを
特長とする熱可塑性プラスチック管のマイクロ波加熱式
融着継手。(1) Fusion joints for plastic pipes are provided in contact with the outer surface of the thermoplastic pipes to be connected, and contain inorganic or organic substances that generate heat when irradiated with microwaves, and are the same as the pipes to be connected. Microwave heating type thermoplastic tube characterized by comprising an annular core made of a mixture with a polymer material and a thermoplastic tubular body closely fitted around the outer circumference of the annular core. Fusion joint. （２）プラスチック管の融着継手において、接続される
熱可塑性プラスチック管の外面に接して設けられ、誘電
損失係数が０．１以上でマイクロ波を照射されて発熱す
る性質を有し、且つ融点が１８０℃以上である樹脂を３
０％以上６０％以下を含有した、被接続管体と同材質高
分子との混練物から成る円環状のコアと、その外周に密
接して嵌着する熱可塑性プラスチック製の管状体とを具
備してなることを特徴とする熱可塑性プラスチック管の
マイクロ波加熱式融着継手。(2) In a plastic pipe fusion joint, it is provided in contact with the outer surface of the thermoplastic pipe to be connected, has a dielectric loss coefficient of 0.1 or more, has the property of generating heat when irradiated with microwaves, and has a melting point 3 resin whose temperature is 180℃ or more
Equipped with an annular core made of a kneaded material of the same polymer as the pipe to be connected, containing 0% or more and 60% or less, and a tubular body made of thermoplastic plastic that fits tightly around the outer periphery of the annular core. A microwave-heated fusion joint for thermoplastic pipes characterized by:
JP1325261A 1989-12-15 1989-12-15 Microwave-heated fusion joints for thermoplastic pipes Pending JPH03186690A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1325261A JPH03186690A (en) 1989-12-15 1989-12-15 Microwave-heated fusion joints for thermoplastic pipes

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1325261A JPH03186690A (en) 1989-12-15 1989-12-15 Microwave-heated fusion joints for thermoplastic pipes

Publications (1)

Publication Number Publication Date
JPH03186690A true JPH03186690A (en) 1991-08-14

Family

ID=18174838

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1325261A Pending JPH03186690A (en) 1989-12-15 1989-12-15 Microwave-heated fusion joints for thermoplastic pipes

Country Status (1)

Country Link
JP (1) JPH03186690A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5294763A (en) * 1989-04-07 1994-03-15 Minnesota Mining And Manufacturing Company Microwave heatable composites
KR101644610B1 (en) * 2015-05-18 2016-08-04 이창훈 A conveyor belt that can display a line or area on a moving belt

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5294763A (en) * 1989-04-07 1994-03-15 Minnesota Mining And Manufacturing Company Microwave heatable composites
KR101644610B1 (en) * 2015-05-18 2016-08-04 이창훈 A conveyor belt that can display a line or area on a moving belt

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