JPH08281805A - 合成樹脂成形品の熱風溶接法 - Google Patents

合成樹脂成形品の熱風溶接法

Info

Publication number
JPH08281805A
JPH08281805A JP7111191A JP11119195A JPH08281805A JP H08281805 A JPH08281805 A JP H08281805A JP 7111191 A JP7111191 A JP 7111191A JP 11119195 A JP11119195 A JP 11119195A JP H08281805 A JPH08281805 A JP H08281805A
Authority
JP
Japan
Prior art keywords
welding
resin
welded
molded product
hot air
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.)
Granted
Application number
JP7111191A
Other languages
English (en)
Other versions
JP3388939B2 (ja
Inventor
Yuji Niimi
雄治 新見
Koichi Fujimoto
浩一 藤本
Yoshikatsu Matsuda
吉克 松田
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.)
Takiron Co Ltd
Original Assignee
Takiron Co Ltd
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Filing date
Publication date
Application filed by Takiron Co Ltd filed Critical Takiron Co Ltd
Priority to JP11119195A priority Critical patent/JP3388939B2/ja
Publication of JPH08281805A publication Critical patent/JPH08281805A/ja
Application granted granted Critical
Publication of JP3388939B2 publication Critical patent/JP3388939B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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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
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/861—Hand-held tools
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/12—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined and welding bar
    • 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
    • B29C65/82—Testing the joint
    • B29C65/8207—Testing the joint by mechanical methods
    • B29C65/8215—Tensile tests
    • 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
    • B29C66/11—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
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • B29C66/1162—Single bevel to bevel joints, e.g. mitre 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • 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
    • B29C66/737—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 state of the material of the parts to be joined
    • B29C66/7377—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 state of the material of the parts to be joined amorphous, semi-crystalline or crystalline
    • B29C66/73771—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 state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being amorphous
    • B29C66/73772—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 state of the material of the parts to be joined amorphous, semi-crystalline or crystalline the to-be-joined area of at least one of the parts to be joined being amorphous the to-be-joined areas of both parts to be joined being amorphous
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
    • 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
    • B29C66/912—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux
    • B29C66/9121—Measuring or controlling the joining process by measuring or controlling the temperature, the heat or the thermal flux by measuring the temperature, the heat or the thermal flux by measuring the temperature
    • 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
    • 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
    • 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
    • B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
    • B29C65/12—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined and welding bar
    • B29C65/125—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined and welding bar characterised by the composition of the welding bar
    • 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
    • B29C66/9161—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 heat or the thermal flux, i.e. the heat flux
    • B29C66/91651—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 heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91653—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 heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the voltage, i.e. the electric potential difference or electric tension
    • 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
    • B29C66/9161—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 heat or the thermal flux, i.e. the heat flux
    • B29C66/91651—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 heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating
    • B29C66/91655—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 heat or the thermal flux, i.e. the heat flux by controlling or regulating the heat generated by Joule heating or induction heating by controlling or regulating the current intensity
    • 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
    • B29C66/92—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools
    • B29C66/929—Measuring or controlling the joining process by measuring or controlling the pressure, the force, the mechanical power or the displacement of the joining tools characterized by specific pressure, force, mechanical power or displacement values or ranges

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

(57)【要約】 【目的】 ポリエチレンテレフタレートを基本構造とす
る非晶質のテレフタル酸エステル共重合体から成る樹脂
の成型品の溶接法を提供する。 【構成】 上記共重合体樹脂で成型した溶接棒と該成型
品の溶接部とに温度１８〜２２０℃の熱風を吹き付け
て、成型品を熱風溶接する。

Description

【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明は、化学設備、下水処理設
備、空調設備、機械電気部品その他の工業材料用ないし
公告展示用などとして比較的厚肉で、且つ、非晶質のポ
リテレフタル酸エステル共重合体から成る樹脂成形品を
溶接する方法に関する。
【０００２】
【従来の技術】ポリエチレンテレフタレート系樹脂は、
機械的強度が比較的高く、成形加工性が良好であるが、
一般に結晶性で厚肉品では透明性が得難く、また耐衝撃
性に劣る欠点があり、用途が制限されていたが、非晶質
のポリテレフタル酸エステル共重合体の樹脂の出現によ
り、雑貨用あるいは公告展示用板材として、更には工業
材料として、使用可能な用途が開発されつつあり、透光
性又は非透光性で種々の厚肉の板材その他の樹脂成形品
が利用可能になっている。
【０００３】従来の非晶質のポリテレフタル酸エステル
共重合体の樹脂は、フィルムないし薄肉のシートとして
供給され利用されており、シートの接合方法として、接
着法の他、超音波溶接法、高周波溶接法などの溶接法が
知られていた。
【０００４】しかしながら、肉厚の大きい板材や異形断
面の樹脂板を工業用その他の用途に利用しようとする
と、広幅・大型の製品に溶接加工したり、構造物に溶接
組立てする必要が生じる。このような樹脂成形品の溶接
に際して、従来の上記溶接法は、主に０．５ｍｍ以下の
薄物シートの重ね合わせ溶接に適した方法であって、２
ｍｍ以上の厚肉板では、融着時間を長くしても融着が困
難であり、重ね合わせ溶接であるので製品に段差を生
じ、また、融着用の金型を必要とすることから複雑な形
状の製品に対しては溶接が困難で、さらに、小ロットの
製品の組立に使用するには不向きであった。
【０００５】他方、従来、塩化ビニル樹脂等の熱可塑性
樹脂の溶接方法として、溶接棒を使用して熱風により溶
接する方法がある。この熱風溶接法は、適切な温度の熱
風を用い、しかも溶接棒に適切な押圧力を付加しない
と、充分な溶接強度が得られないので、溶接組立をした
製品が溶接部で破損するという問題が知られている。し
かし、非晶質のポリテレフタル酸エステル共重合体の樹
脂に対して熱風溶接の可能性や、熱風温度・溶接棒の押
圧力等の溶接条件は知られていなかった。
【０００６】本発明は、上記問題に鑑み、非晶質のポリ
テレフタル酸エステル共重合体の比較的厚肉の樹脂成形
品に適した溶接法を提供しようとするものである。
【０００７】
【解決手段とその作用】本発明の樹脂成形品の溶接法
は、ポリエチレンテレフタレートを基本構造とした非晶
質のポリテレフタル酸エステル共重合体から成る樹脂成
形品の熱風溶接方法であって、該樹脂成形品の溶接部と
上記共重合体の樹脂の溶接棒とに温度１８０〜２２０℃
の熱風を吹き付けて該樹脂成形品を溶接することを特徴
とする。
【０００８】この溶接法においては、溶接中に溶接棒を
０．７〜１．０ｋｇの押圧力で成形品の溶接部に押し付
ける方法が採用される。
【０００９】熱風溶接の対象となる樹脂成形品と溶接棒
は、ポリエチレンテレフタレートを基本構造とした非晶
質のポリテレフタル酸エステル共重合体から成るもので
あるが、このような共重合体には、テレフタル酸と、共
重合成分としてエチレングリコール及び１，４−シクロ
ヘキサンジメタノールとの共重合体があり、特に、モル
比で、１，４−シクロヘキサンジメタノール１部に対し
てエチレングリコール３〜４部の割合の組成を有するも
のが、利用される。この組成のものは、原料樹脂の溶融
後に板材に成形する際に通常の冷却速度でも結晶化しな
いので、樹脂成形品は非晶質となり、他に着色材を含ま
なければ、樹脂成形品は透明となる。
【００１０】溶接棒も上記共重合体の樹脂で成形するの
で、その溶融成形過程で同様に溶接棒は非晶質となり、
透明となる。従って、溶接の際の溶接部の溶着した樹脂
も冷却後は、同様に非晶質で透明となる。
【００１１】本発明の溶接法は、熱風溶接を使用するも
ので、樹脂成形品の溶接部と、上記共重合体の樹脂の溶
接棒とに熱風を吹き付けて、樹脂成形品の溶接部と溶接
棒とを溶融し、溶接部に溶着充填するので、冷却後は、
一体に接合される。通常は、接合すべき２つの樹脂成形
品の間に線状に溶接部を設け、溶接部に溶接棒を板面に
ほぼ垂直に立てて押圧力を付加し、溶接棒の溶接部との
接触部周辺に熱風を供給して加熱し、溶接棒を溶かしな
がら溶接部の方向に沿って移動させる。
【００１２】熱風温度を１８０〜２２０℃の範囲とする
が、１８０℃未満であると、上記共重合体樹脂の溶接
棒、樹脂成形品は共に溶着可能な程度まで溶融しないの
で、溶接できない。他方、２２０℃を越えると早く溶け
すぎて上記の押圧力を付加できないので、溶接強度が小
さくなり、溶接部の形状・外観も悪く、作業性も悪くな
る。上記温度範囲で、溶接強度と外観の点からは１８０
〜２００℃の範囲で溶接するのが好ましい。作業性の点
から２００〜２２０℃の温度範囲が好ましい。
【００１３】樹脂成形品の溶接部に対する溶接棒の押圧
力を０．７〜１．０ｋｇとするが、この押圧力により溶
接部に圧力が加わり、必要な溶接強度が得られる。押圧
力が０．７ｋｇより低いと、溶接棒と成形品の溶接部と
の溶融樹脂が相互溶解不十分となり、気泡が残留してピ
ンホールを生じ、溶着不足となり、他方、１．０ｋｇを
越えると、溶融樹脂が溶接部からはみ出して、充分充填
しなくなり、いずれにおいても、溶接強度が小さくな
る。
【００１４】この条件で、樹脂成形品の厚みが１．５ｍ
ｍ以上の溶接が可能であり、溶接棒としては、丸棒形状
であるシングル溶接棒の直径２〜４ｍｍのものが適当で
あるが、溶接量を高めるために、まゆ型のダブル溶接棒
や三角形状のトリプル溶接棒が利用できる。
【００１５】熱風供給手段としては、モータ駆動の送風
ブロワーの内部に電熱ヒーターを配置して、空気出口を
ノズルで絞る構造のものが利用される。空気供給量と電
熱ヒーターへの供給電力とから、所要の熱風量と上記温
度範囲が制御できるものであればよい。例示すれば、熱
風量は５０ｌ／ｍｉｎ程度とし、熱風温度は、電熱ヒー
ターへの電圧又は電流を可変調節して行う。
【００１６】樹脂成形品と溶接棒には、上記非晶質のポ
リテレフタル酸エステル共重合体の樹脂中に紫外線吸収
剤が添加されてもよい。これにより長期間の紫外線吸収
に伴う強度劣化や変色が防止でき、屋外で長期使用中の
母材と溶接部溶着樹脂の両方で耐候性が保証される。紫
外線吸収剤としては、ベンゾフェノン誘導体やベンゾト
リアゾール誘導体が使用され、その添加量は、０．０５
〜５．０重量％とするのがよい。
【００１７】また、樹脂成形品には、上記の非晶質のポ
リテレフタル酸エステル共重合体の樹脂で基材を構成
し、該基材の片面又は両面に上記の紫外線吸収剤が添加
されたアクリル系樹脂、特にポリメチルメタクリレート
の薄い樹脂被覆層を形成したものも被溶接材料に使用で
きる。この場合は、基材の樹脂には紫外線吸収剤を含ま
ぬようにしてよいが、溶接棒には上記の紫外線吸収剤を
含む上記の非晶質のポリテレフタル酸エステル共重合体
の樹脂で成形したものを使用し、これにより溶接後の溶
着樹脂に耐候性を付与することができる。
【００１８】溶接すべき樹脂成形品の組合せは、樹脂板
同士や、樹脂板とアングルやチャンネル等の溶接も行わ
れ、アングルやチャンネル同士やパイプ同士の溶接にも
利用できる。また。突き合わせ溶接、重ね溶接、隅肉溶
接等組合せに制限はなく、また、溶接姿勢も、下向き、
立向き、横向き、上向きのいずれも可能である。
【００１９】
【実施例】図１には、本発明の溶接法に使用する熱風供
給装置とその溶接の態様を示している。これは、非晶質
のポリテレフタル酸エステル共重合体樹脂板１ａ、１ｂ
の突き合わせ溶接の例で、溶接部３は、樹脂板１ａ、１
ｂの端縁を切削して、開先形状としてある。
【００２０】熱風供給装置には、握持操作型の熱風ブロ
ワー４を使用しており、ブロワー本体４０の後部に送風
用の回転羽根４５をモータ（不図示）により回転させ、
その前の送風路に配置した電熱線４４に通電することに
より、空気を加熱し、その前方のノズル部４１で管路を
絞って、出口４２から所定温度の熱風が所定流量で送出
されるようになっている。
【００２１】溶接棒２を垂直に立てながら溶接部３に押
し当てて、熱風ブロワー４のノズル部４１の熱風出口４
２を、溶接部３と溶接棒２の下部とに向けて熱風を吹き
つけて、両者を同時に加熱し、溶融樹脂２１を溶接部３
の開先の開口部に充填溶着させるように溶接棒２を下方
に加圧調節しながら、順次溶接棒２を溶接部３に沿って
前方に移動させる。溶融樹脂２１は、冷却して溶着樹脂
２２となり、母材の樹脂板１ａ、１ｂを強固に接合す
る。溶着樹脂２２はそのままにするか、又は、溶接部が
樹脂板１ａ、１ｂの表面と面一となるように溶着樹脂２
２の表面余盛を切削ないし研削して切除する。
【００２２】次に、上記の溶接法により行った溶接試験
結果を示す。樹脂板は、非晶質のポリテレフタル酸エス
テル共重合体樹脂として、ポリエチレンテレフタレート
のエチレングリコール成分の一部を１，４−シクロヘキ
サンジメタノールに置換した構造のイーストマンケミカ
ル社製造の商品名「ＫＯＤＡＲ ＰＥＴＧ１４４７３」
（以下単に、ＰＥＴＧという）を押出成形法により、板
厚３．０ｍｍの樹脂板に成形したものを使用した。溶接
棒は、同じくＰＥＴＧを押出成形により、直径３．０ｍ
ｍの丸棒にして、使用した。
【００２３】上記の樹脂板２枚を、両側に３５°の角度
の開先を設けて水平面に突き合わせて、上記の溶接棒に
より、下向き姿勢で溶接をした。熱風ブロワーの熱風量
を５０ｌ／ｍｉｎの一定とし、その熱風温度を１６０〜
２４０の範囲で４水準に分けて、熱風を吹きつけ、この
際、溶接棒を手で保持して、溶接棒を押圧力０．７〜
１．０ｋｇで溶接部に常時押し付けて、溶接を行った。
熱風温度は、上記のノズル部４１の熱風出口４２で測定
した。
【００２４】溶接ができた試料については、溶接部を含
む引張試験片を切り出して、溶接部の引張強度を測定し
て、溶接強度とした（ＪＩＳ Ｚ３８３１に準拠）。試
験結果を表１にまとめてある。表中の溶接効率は、母材
の引張強度に対する溶接強度の比率を表している。
【００２５】
【表１】
【００２６】表１の結果から判るように、熱風温度１８
０℃以下では、溶接棒自体が溶融せず、溶接不能であっ
た。２２０℃を越えると、溶接棒が早く溶けすぎて、溶
接棒による所定の押圧力が付加できず、溶接強度が低下
し、さらに、溶融樹脂が溶接棒より大きくはみ出し、且
つ、その上面も凹凸となって外観が悪くなり、一定のス
ピードで溶接することができなくなり、作業性も低下し
ている。
【００２７】１８０〜２２０℃の温度範囲では、樹脂板
と溶接棒とが適度に溶けて押圧力を付加できるので、樹
脂板と溶接棒とが溶け合っており、８０％以上の高い溶
接効率が得られ、溶融樹脂が溶接棒より少しはみ出す程
度の溶接状態となり、外観も良好で、作業性も良好であ
った。特に、１８０〜２００℃の範囲が溶着樹脂の外
観、作業性とも良好で、溶接強度も高く、溶接効率もよ
い。他方、熱風温度を２００〜２２０℃に上げると、溶
接速度を高めることができるので、溶接作業の能率が向
上する利点がある。
【００２８】
【発明の効果】本発明の非晶質のポリテレフタル酸エス
テル共重合体を対象とした樹脂成形品の溶接法は、溶接
部と溶接棒の最適熱風温度で、熱風溶接をするので、溶
接の作業性が高く、溶着樹脂の外観も良好で、溶接強度
も高く、更に溶接効率も優れている。
【図面の簡単な説明】
【図１】本発明の溶接法に使用する熱風供給装置とその
溶接の態様を示す。
【符号の説明】
１ａ 樹脂板 １ｂ 樹脂板 ２ 溶接棒 ２１ 溶融樹脂 ２２ 溶着樹脂 ３ 溶接部 ４ 熱風ブロワー

Claims (3)

    【特許請求の範囲】
  1. 【請求項１】 ポリエチレンテレフタレートを基本構造
    とした非晶質のポリテレフタル酸エステル共重合体樹脂
    の成形品の溶接方法であって、 該成形品の溶接部と上記共重合体樹脂の溶接棒とに温度
    １８０〜２２０℃の熱風を吹き付けて該樹脂成形品を溶
    接することを特徴とする樹脂成形品の熱風溶接法。
  2. 【請求項２】 上記溶接棒を成形品の溶接部に押し付け
    る押圧力が０．７〜１．０ｋｇである請求項１記載の樹
    脂成形品の熱風溶接法。
  3. 【請求項３】 上記共重合体樹脂が、テレフタル酸と、
    共重合成分としてのエチレングリコール及び１，４−シ
    クロヘキサンジメタノールと、の共重合体である請求項
    １又は２記載の樹脂成形品の熱風溶接法。
JP11119195A 1995-04-11 1995-04-11 合成樹脂成形品の熱風溶接法 Expired - Fee Related JP3388939B2 (ja)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003181930A (ja) * 2001-12-18 2003-07-03 Suzuka Fuji Xerox Co Ltd 複合樹脂成形品およびそのリサイクル方法
WO2010025687A1 (zh) * 2008-09-04 2010-03-11 延锋彼欧汽车外饰系统有限公司 用于汽车外饰塑料零件的热风弯压铆焊机以及焊接方法
JP2016056565A (ja) * 2014-09-09 2016-04-21 国立研究開発法人土木研究所 穿孔装置および孔拡張装置

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003181930A (ja) * 2001-12-18 2003-07-03 Suzuka Fuji Xerox Co Ltd 複合樹脂成形品およびそのリサイクル方法
WO2010025687A1 (zh) * 2008-09-04 2010-03-11 延锋彼欧汽车外饰系统有限公司 用于汽车外饰塑料零件的热风弯压铆焊机以及焊接方法
JP2016056565A (ja) * 2014-09-09 2016-04-21 国立研究開発法人土木研究所 穿孔装置および孔拡張装置

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