JP3910567B2 - Method for welding thermoplastic resin molded article having tubular end - Google Patents

Method for welding thermoplastic resin molded article having tubular end Download PDF

Info

Publication number
JP3910567B2
JP3910567B2 JP2003273159A JP2003273159A JP3910567B2 JP 3910567 B2 JP3910567 B2 JP 3910567B2 JP 2003273159 A JP2003273159 A JP 2003273159A JP 2003273159 A JP2003273159 A JP 2003273159A JP 3910567 B2 JP3910567 B2 JP 3910567B2
Authority
JP
Japan
Prior art keywords
welding
tubular
resin molded
thermoplastic resin
molded article
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP2003273159A
Other languages
Japanese (ja)
Other versions
JP2004216859A (en
Inventor
憲麗 北尾
穣 肥尾
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.)
Kitz SCT Corp
Original Assignee
Kitz SCT 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 Kitz SCT Corp filed Critical Kitz SCT Corp
Priority to JP2003273159A priority Critical patent/JP3910567B2/en
Publication of JP2004216859A publication Critical patent/JP2004216859A/en
Application granted granted Critical
Publication of JP3910567B2 publication Critical patent/JP3910567B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • B29C66/50—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
    • 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
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • 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
    • B29C66/03—After-treatments in the joint area
    • B29C66/034—Thermal after-treatments
    • B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
    • 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
    • B29C66/32—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
    • 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
    • B29C66/3242—Avoiding burr formation on the inside of a tubular or hollow article
    • 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
    • B29C66/5223—Joining tubular articles for forming corner connections or elbows, e.g. for making V-shaped pieces
    • B29C66/52231—Joining tubular articles for forming corner connections or elbows, e.g. for making V-shaped pieces with a right angle, e.g. for making L-shaped pieces
    • 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
    • B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
    • B29C66/52241—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces with two right angles, e.g. for making T-shaped pieces
    • 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
    • B29C66/50—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
    • B29C66/63—Internally supporting the article during joining
    • B29C66/634—Internally supporting the article during joining using an inflatable core
    • 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
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81266—Optical properties, e.g. transparency, reflectivity
    • B29C66/81267—Transparent to electromagnetic radiation, e.g. to visible light
    • 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
    • B29C66/912—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
    • B29C66/91211—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 with special temperature measurement means or methods
    • B29C66/91216—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 with special temperature measurement means or methods enabling contactless temperature measurements, e.g. using a pyrometer
    • 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
    • B29C66/70—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)
  • Electromagnetism (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Description

本発明は、管状端を有する熱可塑性樹脂成形品の溶着方法に関し、特に、半導体産業分野に好適な溶着方法である。 The present invention related to the welding how the thermoplastic resin molded article having a tubular end, in particular, is a preferred welding method in the semiconductor industry.

この種の溶着方法は、熱可塑性樹脂成形品の管状端を加熱手段で溶融するまで加熱し、その後、溶融した管状端同士を所定の圧力で突き合せて溶着する突き合せ溶着方法として一般に広く実施されている。
特に、この熱可塑性樹脂成形品は、半導体産業、薬品、食品、バイオテクノロジー、化学工業分野など、耐薬品性、耐熱性、高いクリーン度を要求される分野において用いられており、従来よりこれらに関連する各種の技術が提案されている。 This type of welding method is generally widely used as a butt welding method in which the tubular ends of a thermoplastic resin molded product are heated until they are melted by a heating means, and then the molten tubular ends are butted together at a predetermined pressure. Has been.
In particular, these thermoplastic resin molded products are used in fields that require chemical resistance, heat resistance, and high cleanliness, such as those in the semiconductor industry, chemicals, food, biotechnology, and chemical industries. Various related technologies have been proposed.

第一に、管状の熱可塑性樹脂体の部材端部にヒータ等を使用し、非接触で両方の部材端部を加熱溶融させ、互いに押し付けることによって溶着させる溶着装置が提案されている（例えば、特許文献１参照）。   First, a welding apparatus has been proposed in which a heater or the like is used at the end portion of a tubular thermoplastic resin body, both the end portions of the member are heated and melted in a non-contact manner, and welded by pressing each other (for example, Patent Document 1).

第二に、図１６に示すように、熱可塑性材料の管状部材１、２の外周囲に配置された外部支持部材３と内周囲に配置された内部支持部材４と、外周を包囲したヒータ５とを配置し、管状部材１、２の端部をヒータ５によって溶融して押し付ける時に、管状部材１、２の内部の内部支持部材４を膨らませることにより管状部材１、２の溶着部内周に発生する内面ビードを防止する技術が提案されている（例えば、特許文献２参照）。   Secondly, as shown in FIG. 16, the outer support member 3 disposed on the outer periphery of the tubular members 1 and 2 made of thermoplastic material, the inner support member 4 disposed on the inner periphery, and the heater 5 surrounding the outer periphery. When the ends of the tubular members 1 and 2 are melted and pressed by the heater 5, the inner support member 4 inside the tubular members 1 and 2 is inflated to the inner periphery of the welded portion of the tubular members 1 and 2. A technique for preventing the generated inner surface bead has been proposed (see, for example, Patent Document 2).

第三に、接合させる管状部材の端部形状を変化させることにより温度勾配を発生させ、押し付け時のビードの発生を管外周方向に集中させる方法も提案されている（例えば、特許文献３参照）。   Thirdly, a method has also been proposed in which the temperature gradient is generated by changing the shape of the end of the tubular member to be joined, and the generation of beads during pressing is concentrated in the outer circumferential direction of the tube (for example, see Patent Document 3). .

第四に、接合させる管状部材の端部形状を溶融時に管外径方向に変形させ、
管の内径方向に発生するビードを防止するようにした溶着方法が提案されている（例えば、特許文献４参照）。 Fourth, the end shape of the tubular member to be joined is deformed in the outer diameter direction of the tube when melted,
A welding method has been proposed in which beads generated in the inner diameter direction of the tube are prevented (see, for example, Patent Document 4).

第五に、図１７に示すように、接合を行う配管部材６、７の外周に溶融接合可能なリング部材８を被せ、リング部材８内で互いの配管部材６、７の端面を突き合わせた状態でリング部材８の外周より、クランプヒータ９等で加熱を行い、配管部材６、７とリング部材８を管外周面とリング部材８の内周面で溶融接合させる溶着方法も提案されている。
特開平８−１６２２６４号公報 特許第２６９８６９３号公報 特公平５−７２８６０号公報 特開平１１−１０７３０号公報 Fifthly, as shown in FIG. 17, a ring member 8 that can be melt-bonded is put on the outer periphery of the pipe members 6 and 7 to be joined, and the end faces of the pipe members 6 and 7 are abutted in the ring member 8. A welding method is also proposed in which heating is performed from the outer periphery of the ring member 8 with a clamp heater 9 or the like, and the pipe members 6 and 7 and the ring member 8 are melt-bonded on the outer peripheral surface of the tube and the inner peripheral surface of the ring member 8.
JP-A-8-162264 Japanese Patent No. 2698693 Japanese Patent Publication No. 5-72860 Japanese Patent Laid-Open No. 11-10730

しかしながら、上述した従来例によると、次に示すような各種の課題点を有している。
第一の方法によると、図１８に示すように、管状の熱可塑性樹脂体の押し付け時に、管内周方向に溶融樹脂がはみ出して溶融ビード（以下、内面ビードという）が発生するおそれがある。 However, the conventional example described above has various problems as follows.
According to the first method, as shown in FIG. 18, when the tubular thermoplastic resin body is pressed, the molten resin may protrude in the inner circumferential direction of the tube and a molten bead (hereinafter referred to as an inner surface bead) may be generated.

また、加熱溶融した部材端面同士を押し付ける動作の温度環境は、融点以下であると応力/歪が残ってしまう為、その部材の持つ融点以上であり、その温度を一定に保持する必要がある。しかし、加熱溶融後の押し付けで圧接保持する一連の工程は空冷の雰因気で行っている為、溶融温度が融点以上の温度状態を確保することは難しく、残留応力/歪が発生を防止することが不可能である為、適正な溶着条件の範囲が狭く、溶着条件の設定が難しいという問題を有している。 Moreover, since the stress / strain remains when the temperature environment of the operation of pressing the end faces of the heated and melted members is below the melting point, it is above the melting point of the member, and it is necessary to keep the temperature constant. However, a series of steps of pressure contact with pressing after melting by heating for that are performed in the cut cause air air-cooled, it is difficult to melting temperature to ensure a temperature at or above the melting point, the residual stress / strain to prevent the generation Since this is impossible, there is a problem that the range of proper welding conditions is narrow and it is difficult to set the welding conditions.

第二の方法によると、図１６に示すように、特殊な溶着機（ヒータ）５を使用する必要があるばかりでなく、複雑な形状の配管を製作することが不可能であると共に、管状部材１、２の溶着部を圧接することなく溶融接合するため、溶着強度が低下するおそれがある。   According to the second method, as shown in FIG. 16, it is not only necessary to use a special welding machine (heater) 5, but also it is impossible to manufacture a complicatedly shaped pipe, and the tubular member Since fusion bonding is performed without pressing the welded portions 1 and 2, the welding strength may be reduced.

第三、第四の方法によると、実質的に内面ビードの発生方向をコントロールすることは難しく、そのため現在において実用化されている事実はない。また、図１２、図１３において、第二、第五の方法に共通しているが、管状部材の接合には、互いの管接合部外周を保持する部材３、８が必要であり、これにより分岐管１０などの配管ピッチの狭い場合に、この方法を適用して対応することが極めて難しい等の欠陥を有している。   According to the third and fourth methods, it is difficult to substantially control the direction in which the inner surface bead is generated. 12 and 13, which are common to the second and fifth methods, the members 3 and 8 that hold the outer circumferences of the pipe joint portions are required for joining the tubular members. When the piping pitch of the branch pipe 10 or the like is narrow, there is a defect that it is extremely difficult to cope with this method.

また、第五の方法によると、配管部材６、７の外周面とリング部材８の内周面を溶着接合する方法であるから、図１９に示すように、付き合わせた管端面は溶融により一体化していないため、施工初期の突合せ不良などがあり、管端突合せ部分の溝状には隙間（Ｖノッチ）１１が発生し、パーティクル（汚染物質）などの堆積原因となる可能性が十分にある。   Further, according to the fifth method, since the outer peripheral surfaces of the pipe members 6 and 7 and the inner peripheral surface of the ring member 8 are welded and joined, as shown in FIG. Since it is not converted, there is a butt failure at the initial stage of construction, and a gap (V notch) 11 is generated in the groove shape of the pipe end butt portion, which may cause accumulation of particles (contaminants) and the like. .

上述した従来例によると、何れも管状部材の溶着時に、図１８に示すように内面ビード１２が発生するため、パーティクルの付着による液体純度の低下やバクテリア等の雑菌が発生したり、管流路の減少による液量の低下が生じ、液体の乱れによるマイクロバブルが発生する等の重大な課題点を有している。   According to the above-described conventional examples, when the tubular member is welded, the inner surface bead 12 is generated as shown in FIG. 18, so that the liquid purity is reduced due to the adhesion of particles and bacteria such as bacteria are generated. The amount of liquid is reduced due to the decrease in the amount of liquid, and there are serious problems such as the generation of microbubbles due to liquid disturbance.

また、特に部材端部をヒータ等の熱源で部材を非接触で加熱溶融させる溶融方法により、部材端部のみ加熱溶融する場合は、加熱溶融された箇所は、ラッパ状の急な立ち上がり形状に膨張する。それは、部材端面からの温度勾配が急であること、及びその材料の持つ熱膨張性、残留した内部応力等の為である。これにより、部材の諸条件（管材肉厚、管材成形方法、管材材種等）により良好な形状を得られない場合がある。   In particular, when only the end of the member is heated and melted by a melting method in which the end of the member is heated and melted in a non-contact manner with a heat source such as a heater, the heated and melted portion expands into a trumpet-like sharp rising shape. To do. This is because the temperature gradient from the end face of the member is steep, the thermal expansion property of the material, the residual internal stress, and the like. Thereby, a favorable shape may not be obtained depending on various conditions of the member (tube material thickness, tube material forming method, tube material type, etc.).

本発明は、上述の従来例が有している課題点を解決するために開発に至ったものであり、その目的とするところは、簡単な方法と装置によって内面ビードの発生を防ぎ、もって、従来に有していた課題を一挙に解決することにある。   The present invention has been developed in order to solve the above-described problems of the conventional example, and the object of the present invention is to prevent the occurrence of inner beads by a simple method and apparatus, The purpose is to solve the problems that have been present in the past.

上記の目的を達成するため、請求項１に係る発明は、熱可塑性樹脂成形品のチューブ管状端同士を溶融させて溶着する方法であって、溶融し合った管状端同士を押付け機構により所定の距離及び速度で押し付け圧接させて溶融接合し、この接合状態を一定時間加圧保持し、次いで、引伸し機構で管状部材の片方若しくは両方を前記押し付け方向とは逆方向に引き伸ばした引伸し工程を経ることにより、管内面に発生した内面ビードを引き伸ばして滑らかな状態に減少させ、その後、冷却工程を経て内面ビードの発生を防ぐようにした溶着方法である。 In order to achieve the above object, the invention according to claim 1 is a method of fusing and welding tube tubular ends of a thermoplastic resin molded article, and the molten tubular ends are pressed against each other by a pressing mechanism. It is melt-bonded by pressing and pressing at a distance and at a speed, and this bonded state is kept under pressure for a certain period of time, and then a stretching process is performed in which one or both of the tubular members are stretched in the direction opposite to the pressing direction by a stretching mechanism. Thus, the inner surface bead generated on the inner surface of the pipe is stretched and reduced to a smooth state, and then the inner surface bead is prevented from being generated through a cooling step .

請求項２に係る発明は、請求項１の溶着方法において、溶着工程中、管状端溶着部の温度管理を連続的に行うようにした管状端を有する熱可塑性樹脂成形品の溶着方法である。 The invention according to claim 2 is the welding method according to claim 1, wherein the thermoplastic resin molded product having a tubular end is configured to continuously perform temperature control of the tubular end weld portion during the welding step.

上記押付け工程には、溶融し合った管状端同士を押付け、所定の時間加圧保持しながら冷却する溶着方法である。 The pressing step is a welding method in which the molten tubular ends are pressed against each other and cooled while being held under pressure for a predetermined time.

請求項４に係る発明は、熱可塑性樹脂成形品が、チューブ、チーズ、エルボ、レデューサ、バルブ、ジョイントである管状端を有する熱可塑性樹脂成形品の溶着方法である。 The invention according to claim 4, the thermoplastic resin molded article is a tube, cheese, elbows, reducers, valves, welding a thermoplastic resin molded article having a tubular end which is joined bets.

以上のことから明らかなように、本発明によると、内面ビードの発生を防止することにより、管流路の減少を防止し、汚染物質の付着やバクテリア等雑菌の発生を防止し、さらに、マイクロバブルの発生を防止することが可能となった。本発明は、特に半導体産業分野に好適であり、例えば、半導体製造プロセス配管に求められる高度な要求をクリアする溶着配管システムであって、継手とチューブの端面突き合せ溶着による完全シールを実現し、接続部内面に摺動部分がないため、パーティクル特性に優れ、溶着部はチューブ部より強度があり、しかも耐熱性を確保し、軽量・コンパクトな継手のため、配管スペースに有効である。 As is apparent from the above, according to the present invention, by preventing the occurrence of inner surface beads, the decrease of the pipe flow path is prevented, the adhesion of contaminants and the generation of germs such as bacteria, It became possible to prevent the occurrence of bubbles. The present invention is particularly suitable for the semiconductor industry field, for example, a welded piping system that clears high demands required for semiconductor manufacturing process piping, and realizes complete sealing by end face butt welding of joints and tubes, Since there is no sliding part on the inner surface of the connecting part, it has excellent particle characteristics, the welded part is stronger than the tube part, and heat resistance is secured.

部材溶融温度を管理調節することで適切な温度環境を作り、その環境で引伸溶着できることにより、従来技術の溶着方法による内面ビードの形状に比べて、さらに滑らかに低減することが可能となった。   By controlling and controlling the member melting temperature, an appropriate temperature environment can be created and stretch welding can be performed in that environment, so that it has become possible to reduce more smoothly than the shape of the inner surface bead by the conventional welding method.

部材端面溶融時に部材全体の温度勾配を調節した温度環境を作り、その環境で引伸溶着することにより、内面ビードの突出が滑らかに低減し、さらに、冷却時の温度、冷却速度を管理することにより、溶融部の結晶化度の管理や残留応力の発生を低減することが可能となり、さらに、内部応力（抵抗）が抑止される為に適正な溶着条件の範囲が広くなり、溶着条件の設定を容易に行えることが可能となった。   By creating a temperature environment that adjusts the temperature gradient of the entire member when melting the end surface of the member, by extending and welding in that environment, the protrusion of the inner bead is reduced smoothly, and furthermore, by controlling the temperature and cooling rate during cooling In addition, it is possible to control the crystallinity of the melted part and reduce the occurrence of residual stress. Furthermore, since the internal stress (resistance) is suppressed, the range of appropriate welding conditions is widened and the welding conditions can be set. It became possible to do easily.

溶着による熱可塑性樹脂、例えば、ＰＦＡ（パーフルオロアルコキシエチレン共重合樹脂）固有の材質特性（耐薬品性、フレックスライフ等）の劣化を防止することが可能となった。   It has become possible to prevent deterioration of material properties (chemical resistance, flex life, etc.) unique to thermoplastic resins such as PFA (perfluoroalkoxyethylene copolymer resin) due to welding.

また、部材の内外部に特別な装置や部材を設置する必要がないので、エルボやチーズ等の溶着が可能となるため、複雑な形状である配管体の製作が可能となり、また、分岐配管の製作において、より短いピッチでの製作が可能となった。   In addition, since it is not necessary to install special devices or members inside or outside the member, it is possible to weld elbows, cheese, etc., making it possible to manufacture piping bodies with complicated shapes, and for branch piping In production, production at a shorter pitch became possible.

更には、管端部に特別な加工等を行うことなく、管内面に発生する内面ビードの発生を確実に防止することが可能となった。
しかも、配管接合内部に内部支持部材等の特別な装置を使用することなく、管内面に発生する内面ビードの発生を防止することが可能となった。 Furthermore, it has become possible to reliably prevent the occurrence of an inner surface bead generated on the inner surface of the tube without performing special processing or the like on the end portion of the tube.
In addition, it is possible to prevent the occurrence of an inner surface bead generated on the inner surface of the pipe without using a special device such as an internal support member inside the pipe joint.

本発明における管状端を有する熱可塑性樹脂成形品の溶着方法とその装置並びにこれによって溶着された配管体の好ましい実施形態を説明する。
図１は、本発明における溶着方法の工程を示すフローチャートであり、図２は、図１の各工程を説明した説明図であり、図３は、本発明における溶着方法で溶着した配管体の断面図である。 A preferred embodiment of a method and apparatus for welding a thermoplastic resin molded article having a tubular end in the present invention and a piping body welded thereby will be described.
FIG. 1 is a flowchart showing steps of a welding method according to the present invention, FIG. 2 is an explanatory view explaining each step of FIG. 1, and FIG. 3 is a cross section of a pipe body welded by the welding method according to the present invention. FIG.

図１及び図２における管状端を有する熱可塑性樹脂成形品は、管状部材２０、２１を示し、熱可塑性樹脂は、例えば、ＰＦＡ（パーフルオロアルコキシエチレン共重合樹脂）、塩化ビニリデン、塩化ビニル、酢酸ビニル、ポリビニルアルコール、スチロール、ＡＢＳ、ポリカーボネート、ポリエチレン、超高分子ポリエチレン、ポリプロピレン、アクリル、ブチレート、アセテート、ポリアミド、ポリアセタール、ＡＳ、フッ素樹脂、フッ化ビニリデンなどの樹脂材料を挙げることができる。   The thermoplastic resin molded article having a tubular end in FIGS. 1 and 2 shows tubular members 20 and 21. Examples of the thermoplastic resin include PFA (perfluoroalkoxyethylene copolymer resin), vinylidene chloride, vinyl chloride, acetic acid. Examples thereof include resin materials such as vinyl, polyvinyl alcohol, styrene, ABS, polycarbonate, polyethylene, ultra-high molecular polyethylene, polypropylene, acrylic, butyrate, acetate, polyamide, polyacetal, AS, fluororesin, and vinylidene fluoride.

この管状部材２０、２１の管状端を溶着するには、まず、図２（イ）に示すように、溶着装置の押付け機構２２と引伸し機構２３を有するワーククランプに管状部材２０、２１を同軸的にクランプする（ワークセット工程）。   In order to weld the tubular ends of the tubular members 20 and 21, first, as shown in FIG. 2 (a), the tubular members 20 and 21 are coaxially mounted on a work clamp having a pressing mechanism 22 and a stretching mechanism 23 of the welding apparatus. (Work setting process).

次に、図２（ロ）に示すように、溶融熱源２４をセットする。この溶融熱源２４は、ヒータ、加熱板等の熱源であれば良く、この熱源２４は熱可塑性樹脂成形品の溶融温度以上の温度に加熱することができる熱源を用いる。本例では、管状部材２０，２１の端面は、加熱板（ヒータ）２４の熱により非接触で加熱溶融させている。これにより、加熱板２４と管状部材２０，２１とが融着しないようにしている。なお、熱源２４の種類や溶融方法等は、各種のものを適宜に選択するものとし、これらは実施に応じて任意である。   Next, as shown in FIG. 2B, the melting heat source 24 is set. The melting heat source 24 may be a heat source such as a heater or a heating plate. The heat source 24 is a heat source that can be heated to a temperature equal to or higher than the melting temperature of the thermoplastic resin molded product. In this example, the end faces of the tubular members 20 and 21 are heated and melted in a non-contact manner by the heat of the heating plate (heater) 24. Thereby, the heating plate 24 and the tubular members 20 and 21 are prevented from being fused. In addition, the kind of the heat source 24, the melting method, etc. shall select suitably various things, These are arbitrary according to implementation.

次いで、図２（ハ）に示すように、押付け機構２２により、管状部材２０、２１を所定の押付け量押し付け、かつ圧接力を加え、管状端２０ａ、２１ａを溶融接合する（ワーク端面溶融と端面圧接工程）。この接合状態を加圧保持して所定の時間冷却するものとする。   Next, as shown in FIG. 2C, the tubular members 20 and 21 are pressed by a predetermined pressing amount by the pressing mechanism 22 and a pressing force is applied to melt and join the tubular ends 20a and 21a (workpiece end face melting and end face). Pressure welding process). The bonded state is maintained under pressure and cooled for a predetermined time.

その後、図２（ニ）に示すように、引伸し機構２３により、管状部材２０、２１の片方若しくは両方を上述の工程とは逆方向に引くことにより管状部材２０、２１の管状端２０ａ、２１ａの管内に発生した内面ビード２６と外面ビード２５を引き伸ばす（引伸し工程）。
そして、引伸し工程の後に、適宜時間の徐冷による冷却工程を経ることによって図２（ニ）に示すように、内面ビードの発生をなくした管状部材２０、２１の管状端２０ａ、２０ｂを溶融接合することが可能となる。 Thereafter, as shown in FIG. 2 (d), by pulling one or both of the tubular members 20, 21 in the direction opposite to the above-described process by the stretching mechanism 23, the tubular ends 20a, 21a of the tubular members 20, 21 are removed. The inner surface bead 26 and the outer surface bead 25 generated in the pipe are stretched (stretching step).
Then, after the drawing process, the tubular ends 20a and 20b of the tubular members 20 and 21 with no occurrence of inner surface beads are melt-bonded as shown in FIG. It becomes possible to do.

本例においては、熱可塑性樹脂成形品の管状部材２０、２１の溶着例を示したが、これに限ることなく、図４、図５及び図６に示すように、少なくとも一方又は両方の熱可塑性樹脂成形品がチーズ２７（図５参照）、エルボ２８（図６参照）、レデューサ、バルブ２９（図５、図６参照）、ジョイント、分岐管３０（図４参照）等の管状端を溶着する場合も本例における溶着方法及び溶着装置に包含される。   In this example, the welding example of the tubular members 20 and 21 of the thermoplastic resin molded product is shown. However, the present invention is not limited to this, and as shown in FIGS. 4, 5, and 6, at least one or both of the thermoplastics are used. The resin molded product welds tubular ends such as cheese 27 (see FIG. 5), elbow 28 (see FIG. 6), reducer, valve 29 (see FIGS. 5 and 6), joint, branch pipe 30 (see FIG. 4), and the like. The case is also included in the welding method and welding apparatus in this example.

上述した工程を経ることにより、管状端を有する熱可塑性樹脂成形品の溶着方法と溶着装置によって溶着された配管体３１を図３に示すように構成することができる。
また、管状部材２０、２１の内外部に特別な装置や部材を設置する必要がないため、図４に示すように分岐管３０の製作において、より短いピッチ（Ｐ）での製作が可能となる。即ち、図１２、及び図１３の従来例によると、溶着施工時に管状部材１０の内面及び外面を保持する支持具が必要となり、支持具の長さ以下の配管ピッチでの施工が不可能であるが、本例によると、図４に示すように継手の本体に直接溶着を行うことが可能となる。 By passing through the process mentioned above, the piping body 31 welded by the welding method and welding apparatus of the thermoplastic resin molded product which has a tubular end can be comprised as shown in FIG.
Further, since it is not necessary to install a special device or member inside or outside the tubular members 20 and 21, the branch pipe 30 can be manufactured at a shorter pitch (P) as shown in FIG. . That is, according to the conventional example of FIG. 12 and FIG. 13, a support tool for holding the inner surface and the outer surface of the tubular member 10 is necessary at the time of welding construction, and construction with a pipe pitch less than the length of the support tool is impossible. However, according to this example, as shown in FIG. 4, it becomes possible to weld directly to the main body of the joint.

更には、上述のように、管外周部を保持することなく溶着が可能であるから、図１４、図１５に示すように通常のバルブ１３の入口又は出口の継手部１４、管状部材１５、配管継手１６と接続を行う各種の分岐構造をとっていたが、図５、図６に示すように、本例の溶着方法による溶着部位３３により、バルブ２９の入口（出口）に直接、継手３４を溶着することにより、装置自体の省スペース化が可能となった。
また、本例は、管状部材の端面をヒータなどの熱により溶融し、溶着することにより熱可塑性樹脂材料によって成形される管状配管部材全般に応用することができることは勿論である。 Furthermore, as described above, welding can be performed without holding the outer periphery of the pipe. Therefore, as shown in FIGS. 14 and 15, a joint part 14 at the inlet or outlet of a normal valve 13, a tubular member 15, a pipe Although various branched structures for connecting to the joint 16 were taken, as shown in FIGS. 5 and 6, the joint 34 is directly connected to the inlet (outlet) of the valve 29 by the welding portion 33 by the welding method of this example. By welding, the space of the device itself can be saved.
In addition, the present example can be applied to all tubular piping members formed of a thermoplastic resin material by melting and welding the end face of the tubular member with heat from a heater or the like.

次に、管状端溶着部の温度管理を行うことを可能とした管状端を有する熱可塑性樹脂成形品の溶着方法とその装置について説明する。
本例では温度管理手段として、図７に示すように、非接触温度計（サーモグラフィー）３２と、温度コントロール部３３により温度調整可能に設けた温調ヒータ内蔵クランプ治具等を用いる。なお、後述する各工程説明図において、図２と同一部分は、同一符号で示す。
まず、図８（イ）に示すように、溶着装置の押付け機構２２´と引伸し機構２３´を有する温調ヒータ内蔵クランプ治具に管状部材２０、２１を同軸的にクランプする（ワークセット工程）。 Next, a method and apparatus for welding a thermoplastic resin molded article having a tubular end capable of performing temperature control of the tubular end weld portion will be described.
In this example, as a temperature management means, as shown in FIG. 7, a non-contact thermometer (thermography) 32, a temperature adjusting heater built-in clamp jig provided so that the temperature can be adjusted by a temperature control unit 33, and the like are used. In addition, in each process explanatory drawing mentioned later, the same part as FIG. 2 is shown with the same code | symbol.
First, as shown in FIG. 8 (a), the tubular members 20, 21 are coaxially clamped to a clamp jig with a built-in temperature control heater having a pressing mechanism 22 'and a stretching mechanism 23' of the welding apparatus (work setting step). .

次に、図８（ロ）に示すように、溶融熱源２４をセットする。この溶融熱源２４は、ヒータ、加熱板等の熱源であれば良く、この熱源２４は熱可塑性樹脂成形品の溶融温度以上の温度に加熱することができる熱源を用いる。本例では、加熱板（ヒータ）２４に管状部材２０、２１の管状端を非接触で溶融させている。この溶融工程から管状端溶着部の温度管理を開始する。なお、熱源２４の種類や溶融方法等は、各種のものを適宜に選択するものとし、これらは実施に応じて任意である。図８（ロ）において、矢印は熱の指向性、熱伝導、熱伝達の様子を示している。   Next, as shown in FIG. 8B, the melting heat source 24 is set. The melting heat source 24 may be a heat source such as a heater or a heating plate, and the heat source 24 is a heat source that can be heated to a temperature equal to or higher than the melting temperature of the thermoplastic resin molded product. In this example, the tubular ends of the tubular members 20 and 21 are melted in a non-contact manner on the heating plate (heater) 24. The temperature control of the tubular end welded portion is started from this melting step. In addition, the kind of the heat source 24, the melting method, etc. shall select suitably various things, These are arbitrary according to implementation. In FIG. 8B, arrows indicate the direction of heat, heat conduction, and heat transfer.

次いで、管状端溶着部の温度管理を行いながら、図８（ハ）に示すように、押付け機構２２´により、管状部材２０、２１を所定の押付け量押し付け、かつ圧接力を加え、管状端２０ａ、２１ａを溶融接合する（ワーク端面溶融と端面圧接工程）。この接合状態を加圧保持して所定の時間冷却するものとする。   Next, while controlling the temperature of the tubular end weld portion, as shown in FIG. 8C, the tubular members 20 and 21 are pressed by a predetermined pressing amount and a pressing force is applied by the pressing mechanism 22 ', and the tubular end 20a is applied. , 21a (workpiece end face melting and end face pressure welding process). The bonded state is maintained under pressure and cooled for a predetermined time.

その後、管状端溶着部の温度管理を行いながら、図８（ニ）に示すように、引伸し機構２３´により、管状部材２０、２１の片方若しくは両方を上述の工程とは逆方向に引くことにより管状部材２０、２１の管状端２０ａ、２１ａの管内に発生した内面ビード２６と外面ビード２５を引き伸ばす（引伸し工程）。
そして、引伸し工程の後に、冷却速度を管理しながら適宜時間の徐冷による冷却工程を行い、この冷却工程終了まで管状端溶着部の温度管理を連続的に行う。 これにより、図８（ニ）に示すように、内面ビードの発生をさらになくした管状部材２０、２１の管状端２０ａ、２０ｂを溶融接合することが可能となる。 Thereafter, while controlling the temperature of the tubular end welded portion, as shown in FIG. 8 (d), the drawing mechanism 23 'pulls one or both of the tubular members 20, 21 in the direction opposite to the above-described process. The inner surface beads 26 and the outer surface beads 25 generated in the tubes of the tubular ends 20a, 21a of the tubular members 20, 21 are stretched (stretching step).
Then, after the stretching process, a cooling process is performed by gradually cooling for a time while managing the cooling rate, and the temperature control of the tubular end welded part is continuously performed until the end of the cooling process. As a result, as shown in FIG. 8 (d), the tubular ends 20a and 20b of the tubular members 20 and 21 that further eliminate the occurrence of inner surface beads can be melt-bonded.

従来技術のように、ヒータ等の熱源で部材を非接触で加熱溶融させる溶融方法では、部材端部のみ加熱溶融されるので、加熱溶融された箇所は、ラッパ状の急な立ち上がり形状に膨張することがある。それは、部材端面からの温度勾配が急であること、及びその材料の持つ熱膨張性、残留した内部応力等の為である。
本発明のように、温調ヒータ内蔵クランプ治具等で部材を加熱保持し、且つ、部材端面を従来通りヒータ等で加熱溶融することで部材端面からの温度勾配を滑らかにすることにより、溶融時の部材端面形状が、ラッパ状の急な立ち上がり形状でなく滑らかな形状になる効果があり、その滑らかな形状の部材溶融端面同士を引伸溶着することにより、内面ビードが滑らかに減少する。 As in the prior art, in a melting method in which a member is heated and melted in a non-contact manner with a heat source such as a heater, only the end portion of the member is heated and melted. Sometimes. This is because the temperature gradient from the end face of the member is steep, the thermal expansion property of the material, the residual internal stress, and the like.
As in the present invention, the member is heated and held with a clamp jig with built-in temperature control heater, and the end surface of the member is heated and melted with a heater or the like as usual to melt the temperature gradient from the end surface of the member. There is an effect that the end surface shape of the member becomes a smooth shape instead of a trumpet-like sharp rising shape, and the inner surface beads are smoothly reduced by stretching and welding the melted end surfaces of the smooth shape.

また、結晶化度は物性に対する影響が大きく、管理すべき事項であり、結晶化度は冷却速度に依存する。従来技術では部材端面を加熱溶融し、その部材端面同士を押し付け、押し付け後、加圧保持する溶着方法では、冷却方法は空冷（自然冷却）であった為に冷却速度は管理できていなかったが、本発明では、温度管理手段、例えば、非接触温度計（サーモグラフィー）３２、温度コントロール部３３により温度調整可能に設けた温調ヒータ内蔵クランプ治具等で溶着後の冷却速度を管理することにより、溶着部の結晶化度を管理することが可能となる。なお、結晶成長を促すには結晶成長時間を可能な限り与えることであり、また、結晶が生成する温度範囲は、融点以上から凝固点の間である。   In addition, the crystallinity has a great influence on the physical properties and should be managed, and the crystallinity depends on the cooling rate. In the prior art, the end surfaces of the members are heated and melted, the end surfaces of the members are pressed against each other, and after pressing, the cooling method cannot be controlled because the cooling method is air cooling (natural cooling). In the present invention, by controlling the cooling rate after welding with a temperature control means, for example, a non-contact thermometer (thermography) 32, a clamp jig with a built-in temperature control heater that can be adjusted by the temperature control unit 33, etc. The crystallinity of the welded portion can be managed. In order to promote crystal growth, the crystal growth time should be given as much as possible, and the temperature range at which the crystal is generated is between the melting point and the freezing point.

本例においては、熱可塑性樹脂成形品の管状部材２０、２１の溶着例を示したが、これに限ることなく、図４、図５及び図６に示すように、少なくとも一方又は両方の熱可塑性樹脂成形品がチーズ２７（図５参照）、エルボ２８（図６参照）、レデューサ、バルブ２９（図５、図６参照）、ジョイント、分岐管３０（図４参照）等の管状端を溶着する場合も本例における溶着方法及び溶着装置に包含される。   In this example, the welding example of the tubular members 20 and 21 of the thermoplastic resin molded product is shown. However, the present invention is not limited to this, and as shown in FIGS. 4, 5, and 6, at least one or both of the thermoplastics are used. The resin molded product welds tubular ends such as cheese 27 (see FIG. 5), elbow 28 (see FIG. 6), reducer, valve 29 (see FIGS. 5 and 6), joint, branch pipe 30 (see FIG. 4), and the like. The case is also included in the welding method and welding apparatus in this example.

図１、図２において、管状の熱可塑性樹脂体の管状部材２０、２１の管端部（管状端）２０ａ、２１ａをヒータ２４等により加熱溶融し、互いの端部を所定押し付け量押し付け、圧接力を加え完全に溶融接合した後、管状部材２０、２１の片方若しくは両方を逆方向に引くことにより、管内に発生した内面ビード２６を引き伸ばす。   In FIG. 1 and FIG. 2, tube ends (tubular ends) 20a and 21a of tubular members 20 and 21 of a tubular thermoplastic resin body are heated and melted by a heater 24 or the like, and the end portions are pressed by a predetermined pressing amount, and pressed. After applying a force and completely melting and joining, one or both of the tubular members 20 and 21 are pulled in the opposite direction to stretch the inner bead 26 generated in the tube.

本例では、熱可塑性樹脂材料のうち、ＰＦＡ（パーフルオロアルコキシエチレン共重合樹脂）における引伸溶着施工法について説明する。
溶着時の溶着装置の作動フローを図１と図２に示す。
図２において、管状部材２０、２１をヒータ２４等の溶融熱源を中心にしてその両側に配置し、中心に設けられたヒータ２４等の熱を利用して管状部材２０、２１の管端部２０ａ、２１ａを加熱溶融し、適切な距離及び速度で押し付け圧接溶着した後、十分な圧接力を得るために一定時間保持し、適切な距離及び速度で押し付けた方向と逆方向に引き伸ばすことで管内面に発生した内面ビード２６の発生を防止するようにしている。 In this example, a stretch welding method in PFA (perfluoroalkoxyethylene copolymer resin) among thermoplastic resin materials will be described.
The operation flow of the welding apparatus during welding is shown in FIGS.
In FIG. 2, the tubular members 20 and 21 are disposed on both sides of a melting heat source such as the heater 24, and the tube ends 20a of the tubular members 20 and 21 are utilized by utilizing the heat of the heater 24 provided at the center. , 21a is heated and melted, pressed and welded at an appropriate distance and speed, then held for a certain period of time to obtain a sufficient pressing force, and stretched in a direction opposite to the direction pressed at an appropriate distance and speed. The generation of the inner bead 26 generated in the above is prevented.

溶着接合時の押し付け距離／速度、保持時間、及び引き伸ばし距離／速度、溶融比率の各パラメータの設定は、管状部材質や管肉厚、内面ビード突出高さ、及び平滑度を考慮し決定する。
実験により導いた各パラメータを表１に示す。 The parameters of the pressing distance / speed, the holding time, the stretching distance / speed, and the melting ratio at the time of welding and joining are determined in consideration of the tubular member quality, the pipe wall thickness, the inner bead protrusion height, and the smoothness.
Table 1 shows the parameters derived from the experiment.

Figure 0003910567
Figure 0003910567

また、実験の結果より、上記パラメータ範囲を外れた設定において溶着施工を行うと、下記のような不具合の発生することが確認された。   Also, from the experimental results, it was confirmed that the following problems occur when welding is performed in a setting outside the above parameter range.

Ａ．圧接移動距離／速度が設定範囲外の場合
圧接移動距離が短いと、圧接不足により管状部材６，７の内周面にＶ字状の溝（ノッチ）１１が発生し、図９に示すように、結果として必要な肉厚を確保することができない。また、圧接移動速度が遅いと、圧接される前に溶融部表面が硬化してしまい、完全な接合ができず強度が低下してしまうと共に、接合部内部にボイド（気泡）の発生が見られた。圧接移動速度が速いと、溶着（圧接）部内部に内部応力が生じて歪が残存してしまう。
図１０において、圧接移動距離が長いと、圧接量が多く、溶融させた樹脂が管６、７内外面に押し出されてしまい、流路ｘ’の極端な減少及び溶融部肉厚ｙ’が不足してしまい、適切な強度保持が不可能になる。 A. When the pressure moving distance / speed is outside the set range When the pressure moving distance is short, a V-shaped groove (notch) 11 is generated on the inner peripheral surface of the tubular members 6 and 7 due to insufficient pressure contact, as shown in FIG. As a result, the required wall thickness cannot be secured. In addition, when the pressure moving speed is slow, the surface of the melted portion is cured before being pressed, and complete bonding cannot be achieved and the strength is reduced, and voids (bubbles) are generated inside the bonded portion. It was. When the pressure moving speed is high, internal stress is generated inside the welded (pressed) portion, and strain remains.
In FIG. 10, when the pressure moving distance is long, the amount of pressure contact is large, and the melted resin is pushed out to the inner and outer surfaces of the pipes 6 and 7, and the flow path x ′ is extremely reduced and the melted part thickness y ′ is insufficient. As a result, appropriate strength cannot be maintained.

Ｂ．保持時間が設定範囲外の場合
保持時間が短いと適切な接合が得られず強度が低下する。また、溶着（圧着）部内部にボイド（気泡）が発生しやすくなる。保持時間が長いと溶融樹脂が凝固し、引き伸ばす動作を行ってもビードを伸ばす効果が無くなることが確認された。 B. When the holding time is out of the setting range If the holding time is short, appropriate bonding cannot be obtained and the strength decreases. Further, voids (bubbles) are likely to be generated inside the welded (crimped) portion. It was confirmed that when the holding time was long, the molten resin solidified, and the effect of extending the bead was lost even if the operation of stretching was performed.

Ｃ．引き伸ばし距離／速度が設定範囲外の場合
引き伸ばし速度が速いと、溶着（圧接）部内部にボイド（気泡）の発生が多く見られ、結果として必要な肉厚を確保することができない。また、溶着（圧接）部内部に歪が残存してしまう。引き延ばし速度が遅いと、圧接される前に溶融部表面が硬化してしまい、完全な接合が出来ず強度が低下してしまう。引き伸ばし距離が長いと、内面ビード形状が凹となり、必要な肉厚を確保することが出来ない。
次に、上記表１溶着条件にて溶着施工を行った試料を使用し、引張試験により強度測定を行った結果について説明する。 C. When the stretching distance / speed is out of the set range When the stretching speed is high, a lot of voids (bubbles) are generated inside the welded (pressure-welded) portion, and as a result, the required wall thickness cannot be secured. In addition, strain remains in the welded (pressed) portion. If the stretching speed is slow, the surface of the melted part is cured before being pressed, and perfect bonding cannot be achieved, resulting in a decrease in strength. If the stretching distance is long, the inner bead shape becomes concave and the required wall thickness cannot be ensured.
Next, the results of measuring the strength by a tensile test using a sample that has been welded under the welding conditions shown in Table 1 will be described.

Figure 0003910567
Figure 0003910567

実験結果からも判断できるように、溶着部強度は管状部材であるＰＦＡ樹脂製材料よりも強い強度を持っていることが理解できる。   As can be judged from the experimental results, it can be understood that the welded portion strength is stronger than the PFA resin material which is a tubular member.

Ｄ．従来技術による接合部ビードと適正な溶着条件で溶着を行った接合部ビード状態の比較を行う。
図１１に従来技術により接合したビード形状を示す。
図３に適正条件により接合した本例におけるビード形状を示す。
図１１における従来例のビードは管状部材６、７の内外周面にビードの飛び出しが発生し、内面のビードが流路ｘ”を直径方向に減少させる形状を示すが、図１０のように圧接量が多い状態とは異なり、溶融部の肉厚ｙ”は適正な厚みを持っている。
これに対して、適正条件による本例における接合部ビードは、図３において、管状部材２０、２１の内面に肉厚よりもやや厚い状態に、管状部材２０、２１の内面から滑らかに盛り上がっている状態を示す。
内面のビードは配管肉厚と同一となることが望ましいと考えられるが、図３に示すように、この肉厚は溶着部の強度と相関性があり、溶融部の肉厚ｙは、管状部材２０、２１のチューブ肉厚よりも若干ではあるが厚くすることにより、十分な強度を得ることが可能となる。
また、内面ビードは管状部材２０、２１の内面より徐々に肉厚を増し、また、管状部材２０、２１の内面と同一に戻る。つまり、内面ビードの盛り上がりが微少であり、且つ滑らかであるため、流路ｘの減少による流量や圧力損失の減少、マイクロバブルの発生、ビード部への汚染物質の付着／堆積も防止可能となる。 D. A comparison is made between the joint bead according to the prior art and the joint bead state welded under appropriate welding conditions.
FIG. 11 shows a bead shape joined by a conventional technique.
FIG. 3 shows the bead shape in this example joined under appropriate conditions.
The bead of the conventional example in FIG. 11 has a shape in which the beads protrude from the inner and outer peripheral surfaces of the tubular members 6 and 7, and the bead on the inner surface reduces the flow path x ″ in the diameter direction. Unlike the state where the amount is large, the thickness y ″ of the melted portion has an appropriate thickness.
On the other hand, the joint bead in the present example under the appropriate conditions is smoothly raised from the inner surface of the tubular members 20 and 21 to be slightly thicker than the wall thickness on the inner surfaces of the tubular members 20 and 21 in FIG. Indicates the state.
Although it is considered that the inner surface bead is desirably the same as the pipe wall thickness, as shown in FIG. 3, this wall thickness is correlated with the strength of the welded portion, and the wall thickness y of the molten portion is a tubular member. By making the tube thickness slightly larger than the tube thicknesses of 20 and 21, sufficient strength can be obtained.
Further, the inner bead gradually increases in thickness from the inner surfaces of the tubular members 20 and 21 and returns to the same inner surface as the tubular members 20 and 21. In other words, since the swell of the inner surface bead is small and smooth, it is possible to prevent a decrease in flow rate and pressure loss due to a decrease in the flow path x, generation of microbubbles, and adhesion / deposition of contaminants on the bead portion. .

また、本発明における管状端溶着部の温度管理を行う溶着方法の一例を、本例では、熱可塑性樹脂材料のうち、ＰＦＡ（パーフルオロアルコキシエチレン共重合樹脂）に適用して説明する。溶着時の溶着装置の作動フローを図２と図８に示す。
温度管理手段として、本例では図７に示すように、非接触温度計（サーモグラフィー）３２と、温度コントロール部３３により温度調整可能に設けた温調ヒータ内蔵クランプ治具等を用いる。
図８において、管状部材２０、２１をヒータ２４等の溶融熱源を中心にしてその両側に非接触で配置し、中心に設けられたヒータ２４等の熱を利用して管状部材２０、２１の管端部２０ａ、２１ａを加熱溶融し、管状端溶着部の温度管理を連続的に行いながら、適切な距離及び速度で押し付け圧接溶着した後、十分な圧接力を得るために一定時間保持し、適切な距離及び速度で押し付けた方向と逆方向に引き伸ばすことで管内面に発生した内面ビード２６の発生を防止するようにしている。
また、下記の温度に関する要因を考慮して溶着作業を行わなければ、樹脂の特性等を低下させることが推測される。 Moreover, an example of the welding method which controls the temperature of the tubular end weld part in this invention is demonstrated by applying to PFA (perfluoroalkoxyethylene copolymer resin) among thermoplastic resin materials in this example. The operation flow of the welding apparatus during welding is shown in FIG. 2 and FIG.
In this example, as shown in FIG. 7, a non-contact thermometer (thermography) 32, a temperature adjustment heater built-in clamp jig that can be adjusted by a temperature control unit 33, and the like are used as temperature management means.
In FIG. 8, the tubular members 20 and 21 are arranged in a non-contact manner on both sides of a melting heat source such as the heater 24, and the tubes of the tubular members 20 and 21 are utilized using the heat of the heater 24 provided at the center. The end portions 20a and 21a are heated and melted, and the temperature control of the tubular end welded portion is continuously performed. After pressing and welding at an appropriate distance and speed, holding for a certain time to obtain a sufficient pressure contact force, The inner surface bead 26 is prevented from being generated on the inner surface of the pipe by stretching in a direction opposite to the direction of pressing at a proper distance and speed.
In addition, if the welding operation is not performed in consideration of the following temperature-related factors, it is presumed that the resin characteristics and the like are reduced.

Ｅ．溶融樹脂を高温で長時間保持させた場合
溶融樹脂を高温で長時間保持させた場合、熱劣化して分子量が低下し物性が低下する。その為、溶着条件（溶融温度×保持時間）を管理し、メルトフローレイトの増加率を検査して樹脂の物性を管理することが肝要である。 E. When the molten resin is held at a high temperature for a long time When the molten resin is held at a high temperature for a long time, the resin deteriorates due to heat and the molecular weight decreases and the physical properties decrease. Therefore, it is important to manage the welding conditions (melting temperature × holding time) and to check the rate of increase in melt flow rate to manage the physical properties of the resin.

Ｆ．溶着（圧接）部が融点以下で押し付け引伸ばし作業をした場合
溶着（圧接）部が融点以下で押し付け引伸ばし作業をした場合、融点以下で結晶が生成している状態である為に内部応力が発生し歪が残存する。 F. When the welding (pressure welding) part is pressed and stretched below the melting point When the welding (pressure welding) part is pressed and stretched below the melting point, the internal stress is reduced because crystals are formed below the melting point. Generates distortion and remains.

Ｇ．クランプ治具を高温保持させて部材全体を高温で保持させた場合
クランプ治具を高温保持させて部材全体を高温で保持させた場合、部材が高温から常温に戻った時に部材寸法が変化することがある。その為、予め部材の寸法変化温度条件を試験評価し、その適正温度で部材保持温度を決定する。また、その寸法変化は、材質や成形条件等に依存する。 G. When holding the clamp jig at a high temperature and holding the entire member at a high temperature When holding the clamp jig at a high temperature and holding the entire member at a high temperature, the member dimensions change when the member returns from a high temperature to a normal temperature. There is. Therefore, the dimensional change temperature condition of the member is tested and evaluated in advance, and the member holding temperature is determined at the appropriate temperature. The dimensional change depends on the material, molding conditions, and the like.

Ｈ．結晶化冷却速度が速い場合
結晶化冷却速度が速い場合、結晶が生成する時間が少ない為に結晶化度が増加することにより、物性及び化学的性質の変化が生じる。その為、比重等を測定し結晶化度を評価することにより適正冷却速度を設定する。 H. When the crystallization cooling rate is high When the crystallization cooling rate is high, the crystallinity increases due to the short time for the formation of crystals, resulting in changes in physical properties and chemical properties. Therefore, an appropriate cooling rate is set by measuring specific gravity and evaluating the crystallinity.

Ｉ．応力除去冷却速度が速い場合
応力除去冷却速度が速い場合、局部的に残留応力/歪が集中し、その状態で化学的に厳しい環境に置かれた場合、残留した歪部分を起点にクラックを生じることが懸念される。その為、残留応力を測定評価することにより適正冷却速度を設定する。 I. When stress relieving cooling rate is high When stress relieving cooling rate is high, residual stress / strain concentrates locally, and when placed in a chemically harsh environment in that state, cracks start from the remaining strained part. There is concern. Therefore, an appropriate cooling rate is set by measuring and evaluating the residual stress.

Ｊ．引伸ばし速度/距離が速い/長い場合
引伸ばし速度/距離が速い/長い場合、溶着部内部にボイドが発生し、物性及び化学的性質が低下する。その為、溶着部内部にボイドが存在するか検査評価することにより適性溶着条件を設定する。
次に、ＰＦＡ樹脂部材を用いて、管状端溶着部の温度管理を連続的に行う溶着方法を行った場合の、各溶着工程と溶着（圧接）部の各パラメータ値（参考値）を表３に示す。 J. et al. When the stretching speed / distance is fast / long When the stretching speed / distance is fast / long, voids are generated inside the weld and the physical properties and chemical properties deteriorate. Therefore, appropriate welding conditions are set by inspecting and evaluating whether voids exist inside the welded portion.
Next, Table 3 shows each welding step and each parameter value (reference value) of the welding (pressure welding) portion when performing a welding method in which the temperature control of the tubular end welding portion is continuously performed using the PFA resin member. Shown in

Figure 0003910567
Figure 0003910567

上記表３溶着条件にて溶着施工を行った試料を使用し、引張試験により強度測定を行った結果について説明する。   The result of having performed the strength measurement by the tension test using the sample which performed welding construction on the said Table 3 welding conditions is demonstrated.

Figure 0003910567
Figure 0003910567

実験結果からも判断できるように、溶着部強度は管状部材であるＰＦＡ樹脂製材料よりも強い強度を持っていることが理解できる。   As can be judged from the experimental results, it can be understood that the welded portion strength is stronger than the PFA resin material which is a tubular member.

適正条件による本例における接合部ビードは、図３において、管状部材２０、２１の内面に肉厚よりもやや厚い状態に、管状部材２０、２１の内面から滑らかに盛り上がっている状態を示す。
内面のビードは配管肉厚と同一となることが望ましいと考えられるが、図３に示すように、この肉厚は溶着部の強度と相関性があり、溶融部の肉厚ｙは、管状部材２０、２１のチューブ肉厚よりも若干ではあるが厚くすることにより、十分な強度を得ることが可能となる。
また、内面ビードは管状部材２０、２１の内面より徐々に肉厚を増し、また、管状部材２０、２１の内面と同一に戻る。つまり、内面ビードの盛り上がりが微少であり、且つ滑らかであるため、流路ｘの減少による流量や圧力損失の減少、マイクロバブルの発生、ビード部への汚染物質の付着／堆積も防止可能となる。 In FIG. 3, the joint bead in the present example under appropriate conditions shows a state in which the inner surface of the tubular members 20 and 21 is smoothly raised from the inner surface of the tubular members 20 and 21 to be slightly thicker than the wall thickness.
Although it is considered that the inner surface bead is desirably the same as the pipe wall thickness, as shown in FIG. 3, this wall thickness is correlated with the strength of the welded portion, and the wall thickness y of the molten portion is a tubular member. By making the tube thickness slightly larger than the tube thicknesses of 20 and 21, sufficient strength can be obtained.
Further, the inner bead gradually increases in thickness from the inner surfaces of the tubular members 20 and 21 and returns to the same inner surface as the tubular members 20 and 21. In other words, since the swell of the inner surface bead is small and smooth, it is possible to prevent a decrease in flow rate and pressure loss due to a decrease in the flow path x, generation of microbubbles, and adhesion / deposition of contaminants on the bead portion. .

本発明における溶着方法の工程を示すフローチャートである。It is a flowchart which shows the process of the welding method in this invention. 図１の各工程を説明した説明図である。It is explanatory drawing explaining each process of FIG. 本発明における溶着方法で溶着した配管体の一例を示した断面図である。It is sectional drawing which showed an example of the piping body welded with the welding method in this invention. 本発明における溶着方法で溶着した分岐管の一例を示した断面図である。It is sectional drawing which showed an example of the branch pipe welded with the welding method in this invention. 本発明における溶着方法で溶着したバルブの一例を示した斜視図である。It is the perspective view which showed an example of the valve | bulb welded with the welding method in this invention. 本発明における溶着方法で溶着したバルブの他例を示した斜視図である。It is the perspective view which showed the other example of the valve | bulb welded with the welding method in this invention. 管状端溶着部の温度管理を行う温度管理手段を設けた溶着装置の概略図である。It is the schematic of the welding apparatus provided with the temperature management means which manages the temperature of a tubular end welding part. 本発明における管状端溶着部の温度管理を行う溶着方法の工程説明図である。It is process explanatory drawing of the welding method which manages the temperature of the tubular end weld part in this invention. 圧接不足の従来例を示した管状部材の断面図である。It is sectional drawing of the tubular member which showed the prior art example with insufficient pressure contact. 圧接過多の従来例を示した管状部材の断面図である。It is sectional drawing of the tubular member which showed the conventional example of excessive pressure welding. 圧接過多の従来例を示した管状部材の断面図である。It is sectional drawing of the tubular member which showed the conventional example of excessive pressure welding. 管状部材の内外周に支持具を設けた従来例の断面図である。It is sectional drawing of the prior art example which provided the support tool in the inner periphery of the tubular member. 管状部材の内外周に支持具を設けた従来例の断面図である。It is sectional drawing of the prior art example which provided the support tool in the inner periphery of the tubular member. 従来例を示したバルブと継手の平面図である。It is a top view of a valve and a joint which showed a conventional example. 従来例を示したバルブと継手の平面図である。It is a top view of a valve and a joint which showed a conventional example. 従来の一例を示す溶着方法の断面説明図である。It is sectional explanatory drawing of the welding method which shows an example of the past. 従来の他例を示す溶着方法の断面説明図である。It is sectional explanatory drawing of the welding method which shows the other example of the past. 溶着部位にビードが生じた従来例を示す断面図である。It is sectional drawing which shows the prior art example in which the bead produced in the welding part. 溶着部位にＶノッチが生じた従来例を示す断面図である。It is sectional drawing which shows the prior art example which V notch produced in the welding site | part.

符号の説明Explanation of symbols

２０、２１ 管状部材
２０ａ、２１ａ 管状端（管端部）
２２、２２´ 押付け機構
２３、２３´ 引伸し機構
２４ 溶融熱源
３１ 配管体 20, 21 Tubular member 20a, 21a Tubular end (tube end)
22, 22 'pressing mechanism 23, 23' expansion mechanism 24 melting heat source 31 piping body

Claims (4)

熱可塑性樹脂成形品のチューブ管状端同士を溶融させて溶着する方法であって、溶融し合った管状端同士を押付け機構により所定の距離及び速度で押し付け圧接させて溶融接合し、この接合状態を一定時間加圧保持し、次いで、引伸し機構で管状部材の片方若しくは両方を前記押し付け方向とは逆方向に引き伸ばした引伸し工程を経ることにより、管内面に発生した内面ビードを引き伸ばして滑らかな状態に減少させ、その後、冷却工程を経て内面ビードの発生を防ぐようにしたことを特徴とする管状端を有する熱可塑性樹脂成形品の溶着方法。 A method of welding by melting tube tubular end between the thermoplastic resin molded article, is pressed against the pressing at a predetermined distance and speed by the mechanism pushing the tubular end together with each other and melted to melt bonded, the bonding state Pressurize and hold for a certain period of time, and then stretch the inner surface bead generated on the inner surface of the tube by a stretching process in which one or both of the tubular members are stretched in the direction opposite to the pressing direction by the stretching mechanism to make it smooth. A method for welding a thermoplastic resin molded article having a tubular end, characterized in that generation of an inner surface bead is prevented through a cooling step after that . 請求項１の溶着方法において、溶着工程中、管状端溶着部の温度管理を連続的に行うようにした管状端を有する熱可塑性樹脂成形品の溶着方法。 In the welding method according to claim 1, welding process in welding a thermoplastic resin molded article having a tubular end to perform the temperature control of the tubular end welded portion continuously. 上記押付け工程は、溶融し合った管状端同士を押付け、所定の時間加圧保持しながら冷却することを含む請求項１に記載の管状端を有する熱可塑性樹脂成形品の溶着方法。 The method for welding a thermoplastic resin molded article having a tubular end according to claim 1, wherein the pressing step includes pressing the melted tubular ends against each other and cooling while maintaining pressure for a predetermined time. 請求項１乃至３の何れか１項において、熱可塑性樹脂成形品が、チューブ、チーズ、エルボ、レデューサ、バルブ、ジョイントである管状端を有する熱可塑性樹脂成形品の溶着方法。 In any one of claims 1 to 3, the thermoplastic resin molded article, tube, cheese, elbows, reducers, valves, thermoplastic welding method of the resin molded article having a tubular end which is joined bets.
JP2003273159A 2002-12-27 2003-07-11 Method for welding thermoplastic resin molded article having tubular end Expired - Lifetime JP3910567B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2003273159A JP3910567B2 (en) 2002-12-27 2003-07-11 Method for welding thermoplastic resin molded article having tubular end

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2002381042 2002-12-27
JP2003273159A JP3910567B2 (en) 2002-12-27 2003-07-11 Method for welding thermoplastic resin molded article having tubular end

Publications (2)

Publication Number Publication Date
JP2004216859A JP2004216859A (en) 2004-08-05
JP3910567B2 true JP3910567B2 (en) 2007-04-25

Family

ID=32911305

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003273159A Expired - Lifetime JP3910567B2 (en) 2002-12-27 2003-07-11 Method for welding thermoplastic resin molded article having tubular end

Country Status (1)

Country Link
JP (1) JP3910567B2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016190395A (en) * 2015-03-31 2016-11-10 株式会社キッツエスシーティー Welding method of tube joint made of heat plastic resin, and welding joint and welding machine thereof
US20220105690A1 (en) * 2019-12-10 2022-04-07 Toyota Jidosha Kabushiki Kaisha Welding joining method and welding joined body

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5603225B2 (en) * 2010-12-27 2014-10-08 株式会社キッツエスシーティー Resin annular work melting heater and welding machine
DE102011001459A1 (en) * 2011-03-22 2012-09-27 Mhf Gmbh Device for bonding profile elements
JP5710450B2 (en) * 2011-11-11 2015-04-30 株式会社キッツエスシーティー Resin end face butt joint, welding method of the joint, and piping equipment
JP6072536B2 (en) * 2012-12-26 2017-02-01 東鉄工業株式会社 Apparatus for forming rough surface of metal thin plate and method for forming rough surface of metal thin plate
CN107538747A (en) * 2016-06-27 2018-01-05 上海苏豫电子有限公司 Inlet manifold multi-station servo hot plate welding machine
CN109968683A (en) * 2017-12-28 2019-07-05 上海宝冶集团有限公司 Thermoplastic hot melt connects flange control device and its application method
US11135778B2 (en) * 2018-06-13 2021-10-05 Dukane Ias, Llc Methods for determining a melt layer thickness associated with a predetermined weld strength based on a correlation therebetween

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016190395A (en) * 2015-03-31 2016-11-10 株式会社キッツエスシーティー Welding method of tube joint made of heat plastic resin, and welding joint and welding machine thereof
US20220105690A1 (en) * 2019-12-10 2022-04-07 Toyota Jidosha Kabushiki Kaisha Welding joining method and welding joined body
US11806940B2 (en) * 2019-12-10 2023-11-07 Toyota Jidosha Kabushiki Kaisha Welding joining method and welding joined body

Also Published As

Publication number Publication date
JP2004216859A (en) 2004-08-05

Similar Documents

Publication Publication Date Title
EP0167870A2 (en) Welding fluoropolymer pipe and fittings
JP3910567B2 (en) Method for welding thermoplastic resin molded article having tubular end
JP2014025575A (en) Connection structure of tube, and connection method of tube
US20090101224A1 (en) Joint and joining method for multilayer composite tubing and fittings
EP1202853B1 (en) Beadless welding apparatus
JP6899900B2 (en) Resin tube members, manufacturing methods for resin tube members, resin pipe fittings, and resin piping
JP2018123882A (en) Resin pipe joint
JPH06226854A (en) Welding of plastic pipes
JP2007071323A (en) Connecting method for corrugated pipe
WO2017072886A1 (en) Resin piping member, resin pipe joint, and piping production method
JP4106287B2 (en) Method for joining heat-fusible tubular bodies
JP4071987B2 (en) Thermofusion bonding auxiliary material for thermoplastic resin tube and method for bonding thermoplastic resin tube
JP4771304B2 (en) Method and apparatus for welding synthetic resin tubular members
US11345094B1 (en) Sidewall fusion method for fusing branch outlets to host plastic pipe and apparatus for use therein
JPH07304101A (en) Butt welding method of thermoplastic resin pipe materials
TWI823827B (en) A manufacturing method of a fluororesin membrane distillation device, a repairing method and the production thereof
JP2008087183A (en) Welding method of modified polytetrafluoroethylene molded object, modified polytetrafluoroethylene molded object and gasket using it
JPH07232379A (en) Welding of tubular member
JP3121643B2 (en) How to join tubes
JPH06331089A (en) Electrodeposition method for plastic tube
JP3436952B2 (en) Pipe Fitting Manufacturing Method
JP3181177U (en) Fusion bonding structure of synthetic resin pipe
JP2006231694A (en) Manufacturing method of composite pipe
JP4921069B2 (en) Method of manufacturing a pipe joint using a fluororesin tubular member
JPH048535A (en) Joining of plastic pipes

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20040825

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20050912

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20061003

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20061130

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20070123

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20070124

R150 Certificate of patent or registration of utility model

Ref document number: 3910567

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20100202

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110202

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120202

Year of fee payment: 5

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120202

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130202

Year of fee payment: 6

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140202

Year of fee payment: 7

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term