JPH0752253A - フッ素樹脂pfa製配管の溶着管継ぎ手の加工方法 - Google Patents
フッ素樹脂pfa製配管の溶着管継ぎ手の加工方法Info
- Publication number
- JPH0752253A JPH0752253A JP5240243A JP24024393A JPH0752253A JP H0752253 A JPH0752253 A JP H0752253A JP 5240243 A JP5240243 A JP 5240243A JP 24024393 A JP24024393 A JP 24024393A JP H0752253 A JPH0752253 A JP H0752253A
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- fluororesin pfa
- fluororesin
- pfa pipe
- pipe joint
- 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
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
-
- 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
- B29C65/1429—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 way of heating the interface
- B29C65/1432—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 way of heating the interface direct heating of the surfaces 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
- 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
- B29C65/1496—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 masks
-
- 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
- B29C66/01—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
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1282—Stepped joint cross-sections comprising at least one overlap joint-segment
-
- 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
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1284—Stepped joint cross-sections comprising at least one butt joint-segment
-
- 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
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1286—Stepped joint cross-sections comprising at least one bevelled joint-segment
-
- 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
- B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
- B29C66/128—Stepped joint cross-sections
- B29C66/1286—Stepped joint cross-sections comprising at least one bevelled joint-segment
- B29C66/12861—Stepped joint cross-sections comprising at least one bevelled joint-segment comprising at least two bevelled joint-segments
-
- 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
- B29C66/71—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
-
- 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
- B29C2035/0822—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 IR 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
- B29C65/14—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
- B29C65/1412—Infrared [IR] 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
- B29C65/14—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
- B29C65/1429—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 way of heating the interface
- B29C65/1435—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 way of heating the interface at least passing through one of the parts to be joined, i.e. transmission welding
-
- 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
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
-
- 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
- B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
- B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
- B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- Toxicology (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Abstract
(57)【要約】
【目的】フッ素樹脂PFA製配管の継ぎ手の溶着を確実
にかつ高強度にしかも接合部の管内面に樹脂の突出が発
生しないように加工する方法を提供する。 【構成】フッ素樹脂PFA製管1の端部を溶融温度以下
の熱加工で拡管し、次ぎにフッ素樹脂PFA製管継ぎ手
2を拡管したところに挿入し、その後フッ素樹脂PFA
製管1の外周囲よりフッ素樹脂PFA製管1及びフッ素
樹脂PFA製管継ぎ手2を加熱溶融する。その熱と、フ
ッ素樹脂PFA製管1を拡管したことから生じる収縮力
によってフッ素樹脂PFA製管1とフッ素樹脂PFA製
管継ぎ手2の溶着面に加わる圧力により、溶着を完成さ
せることを特徴とする。
にかつ高強度にしかも接合部の管内面に樹脂の突出が発
生しないように加工する方法を提供する。 【構成】フッ素樹脂PFA製管1の端部を溶融温度以下
の熱加工で拡管し、次ぎにフッ素樹脂PFA製管継ぎ手
2を拡管したところに挿入し、その後フッ素樹脂PFA
製管1の外周囲よりフッ素樹脂PFA製管1及びフッ素
樹脂PFA製管継ぎ手2を加熱溶融する。その熱と、フ
ッ素樹脂PFA製管1を拡管したことから生じる収縮力
によってフッ素樹脂PFA製管1とフッ素樹脂PFA製
管継ぎ手2の溶着面に加わる圧力により、溶着を完成さ
せることを特徴とする。
Description
【0001】
【産業上の利用分野】この発明はフッ素樹脂PFA製配
管の管継ぎ手の溶着を確実にかつ高強度におこなうこと
に関する。
管の管継ぎ手の溶着を確実にかつ高強度におこなうこと
に関する。
【0002】
【従来の技術】フッ素樹脂PFAの溶着をするために
は、溶着部に熱と圧力を加える事が不可欠である。従来
のフッ素樹脂PFA製管継ぎ手の溶着は、管の端面を正
確に垂直に切断し、溶着する両端面を熱板で均一に加熱
溶融したのち、両端面を合わせ加圧して溶着していた。
図2に加工方法を示す。
は、溶着部に熱と圧力を加える事が不可欠である。従来
のフッ素樹脂PFA製管継ぎ手の溶着は、管の端面を正
確に垂直に切断し、溶着する両端面を熱板で均一に加熱
溶融したのち、両端面を合わせ加圧して溶着していた。
図2に加工方法を示す。
【0003】
【発明が解決しようとする課題】従来の溶着方法には次
のような問題があった。イ、溶着される面積が管の断面
積に限定されるため充分な接合強度を確保できない。
ロ、端面を垂直に切る工程で誤差があると部分的に溶着
が不完全になる。ハ、溶着接合部の管内面に溶着の際の
加圧により溶融した樹脂が突出し、使用にあたってゴミ
が付着したり流体のなめらかな流れを妨げる。この発明
は従来のこのような技術の欠点を除去し、確実でかつ流
体の流れを阻害しない溶着管継ぎ手の加工方法を提供す
る。
のような問題があった。イ、溶着される面積が管の断面
積に限定されるため充分な接合強度を確保できない。
ロ、端面を垂直に切る工程で誤差があると部分的に溶着
が不完全になる。ハ、溶着接合部の管内面に溶着の際の
加圧により溶融した樹脂が突出し、使用にあたってゴミ
が付着したり流体のなめらかな流れを妨げる。この発明
は従来のこのような技術の欠点を除去し、確実でかつ流
体の流れを阻害しない溶着管継ぎ手の加工方法を提供す
る。
【0004】
【課題を解決するための手段】図3は新しい管継ぎ手の
加工方法を説明する図である。図3の(a)で示すよう
にフッ素樹脂PFA製管1の端部を溶融温度以下の熱加
工で広げる。次に図3の(b)のようにフッ素樹脂PF
A製管継ぎ手2を挿入する。次に図3の(c)のように
フッ素樹脂PFA製管1外周部よりフッ素樹脂PFA製
管1及びフッ素樹脂PFA製管継ぎ手2を加熱溶融し溶
着する。フッ素樹脂PFAは溶融粘度が高いため適当な
温度管理をすれば流動変形せず溶着できる。
加工方法を説明する図である。図3の(a)で示すよう
にフッ素樹脂PFA製管1の端部を溶融温度以下の熱加
工で広げる。次に図3の(b)のようにフッ素樹脂PF
A製管継ぎ手2を挿入する。次に図3の(c)のように
フッ素樹脂PFA製管1外周部よりフッ素樹脂PFA製
管1及びフッ素樹脂PFA製管継ぎ手2を加熱溶融し溶
着する。フッ素樹脂PFAは溶融粘度が高いため適当な
温度管理をすれば流動変形せず溶着できる。
【0005】
【作用】拡管して管継ぎ手を挿入した部分が溶着面にな
るので、必要な強度を確保できる。また、溶善の際の加
圧力は管の中心方向に働くため管内部に樹脂の突出がな
い。
るので、必要な強度を確保できる。また、溶善の際の加
圧力は管の中心方向に働くため管内部に樹脂の突出がな
い。
【0006】
【実施例】具体的な実施例を説明すると、図4によれば
図4の(a)は150〜200℃に加熱したフッ素樹脂
PFA製管1をフッ素樹脂PTFE製の拡管治具4を用
い定められた寸法に成型した。この拡管の工程は管継ぎ
手の寸法を調整することにより常温で拡管して後挿入し
てもよい。拡管部の内径はフッ素樹脂PFA製管継ぎ手
2の外径より10%以上小さく成型する。理由は管継ぎ
手を挿入したとき接合面にエアーを残さないよう密着さ
せるのと、溶着加工中に挿入部が抜けないようにするた
めである。図4の(b)はフッ素樹脂PFA製管継ぎ手
2をフッ素樹脂PFA製管1に挿入したところである。
フッ素樹脂PFA製管1とフッ素樹脂PFA製管継ぎ手
2はできるだけ直線になるよう調整する。これを怠ると
フッ素樹脂PFA製管継ぎ手2の端面がうまく溶着され
ず凹凸ができる。図4の(C)はフッ素樹脂PFA製管
1外周囲より加熱溶融したところである。熱源5は赤外
線を放射するリング状のヒーターを用いた。赤外線によ
る加熱は管外面と溶着面がほぼ同時に目的の温度にな
り、局部過熱による変形や樹脂の劣化をおこすことなく
溶着でる。このとき目的以外の部分に断熱カバー6を施
しておく。加熱完了後は融点以下まで自然放冷し、その
後は強制空冷した。また、ヒーターで加熱するとき管外
表面を若干空冷すると、空冷した部分が相対的に収縮す
ることになり管中心方向に圧力が発生し、この圧力が溶
着面に作用し、いっそう強固な溶着を完成する。また、
フッ素樹脂PFA製管継ぎ手の挿入部の形状を図5のよ
うにすると機械的接合強度が増し、作業中の位置ずれに
よる失敗が少なくなる。
図4の(a)は150〜200℃に加熱したフッ素樹脂
PFA製管1をフッ素樹脂PTFE製の拡管治具4を用
い定められた寸法に成型した。この拡管の工程は管継ぎ
手の寸法を調整することにより常温で拡管して後挿入し
てもよい。拡管部の内径はフッ素樹脂PFA製管継ぎ手
2の外径より10%以上小さく成型する。理由は管継ぎ
手を挿入したとき接合面にエアーを残さないよう密着さ
せるのと、溶着加工中に挿入部が抜けないようにするた
めである。図4の(b)はフッ素樹脂PFA製管継ぎ手
2をフッ素樹脂PFA製管1に挿入したところである。
フッ素樹脂PFA製管1とフッ素樹脂PFA製管継ぎ手
2はできるだけ直線になるよう調整する。これを怠ると
フッ素樹脂PFA製管継ぎ手2の端面がうまく溶着され
ず凹凸ができる。図4の(C)はフッ素樹脂PFA製管
1外周囲より加熱溶融したところである。熱源5は赤外
線を放射するリング状のヒーターを用いた。赤外線によ
る加熱は管外面と溶着面がほぼ同時に目的の温度にな
り、局部過熱による変形や樹脂の劣化をおこすことなく
溶着でる。このとき目的以外の部分に断熱カバー6を施
しておく。加熱完了後は融点以下まで自然放冷し、その
後は強制空冷した。また、ヒーターで加熱するとき管外
表面を若干空冷すると、空冷した部分が相対的に収縮す
ることになり管中心方向に圧力が発生し、この圧力が溶
着面に作用し、いっそう強固な溶着を完成する。また、
フッ素樹脂PFA製管継ぎ手の挿入部の形状を図5のよ
うにすると機械的接合強度が増し、作業中の位置ずれに
よる失敗が少なくなる。
【0007】
【発明の効果】この加工方法によると次の効果がある。
イ,管端面の加工精度が悪くても溶着強度に影響がない
ので、施工が楽である。ロ,溶着面積を広く設計できる
ので接合強度が大きく、信頼性が高い。ハ,溶着加工の
際生じる管内面への樹脂の突出が無く、突出した部分に
ゴミが付着したり流体の流れを阻害することがない。以
上のように従来の方法の問題を全て解消できる。
イ,管端面の加工精度が悪くても溶着強度に影響がない
ので、施工が楽である。ロ,溶着面積を広く設計できる
ので接合強度が大きく、信頼性が高い。ハ,溶着加工の
際生じる管内面への樹脂の突出が無く、突出した部分に
ゴミが付着したり流体の流れを阻害することがない。以
上のように従来の方法の問題を全て解消できる。
【図1】この図は加工方法の基本を説明した図である。
【図2】この図の(a)〜(d)は従来の加工方法を説
明した図である。
明した図である。
【図3】この図の(a)〜(c)は加工方法を説明した
図である。
図である。
【図4】この図の(a)〜(c)は加工方法の実施例を
説明した図である。
説明した図である。
【図5】この図は管継ぎ手の設計例を示したものであ
る。
る。
1: フッ素樹脂PFA製管 2: フッ素樹脂PFA製管継ぎ手 3: 溶着面 4: フッ素樹脂PTFE製拡管治具 5: 熱源 6: 断熱カバー
Claims (1)
- 【請求項1】溶融温度以下で拡管加工したフッ素樹脂P
FA製管1にフッ素樹脂PFA製管継ぎ手2を挿入し接
合面が密着した状態で、フッ素樹脂PFA製管1の外周
囲からフッ素樹脂PFA製管1及びフッ素樹脂PFA製
管継ぎ手2を溶融温度まで加熱し、その熱と拡管の収縮
によるフッ素樹脂PFA製管1からフッ素樹脂PFA製
管継ぎ手2の溶着面3に加わる圧力により溶着がおこな
われる加工方法。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5240243A JPH0752253A (ja) | 1993-08-19 | 1993-08-19 | フッ素樹脂pfa製配管の溶着管継ぎ手の加工方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP5240243A JPH0752253A (ja) | 1993-08-19 | 1993-08-19 | フッ素樹脂pfa製配管の溶着管継ぎ手の加工方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0752253A true JPH0752253A (ja) | 1995-02-28 |
Family
ID=17056591
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP5240243A Pending JPH0752253A (ja) | 1993-08-19 | 1993-08-19 | フッ素樹脂pfa製配管の溶着管継ぎ手の加工方法 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0752253A (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999062696A1 (fr) * | 1998-06-04 | 1999-12-09 | Daikin Industries, Ltd. | Procede de production de pieces moulees en polytetrafluoroethylene modifie au moyen d'un moulage par raccordement |
WO2005080067A3 (en) * | 2004-02-19 | 2005-11-10 | Baxter Int | Solventless plastic bonding of medical devices and container components through infrared heating |
EP4035872A4 (en) * | 2019-09-24 | 2023-08-23 | Daikin Industries, Ltd. | WELDED BODY |
-
1993
- 1993-08-19 JP JP5240243A patent/JPH0752253A/ja active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1999062696A1 (fr) * | 1998-06-04 | 1999-12-09 | Daikin Industries, Ltd. | Procede de production de pieces moulees en polytetrafluoroethylene modifie au moyen d'un moulage par raccordement |
WO2005080067A3 (en) * | 2004-02-19 | 2005-11-10 | Baxter Int | Solventless plastic bonding of medical devices and container components through infrared heating |
EP4035872A4 (en) * | 2019-09-24 | 2023-08-23 | Daikin Industries, Ltd. | WELDED BODY |
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