JPH10100259A - Apparatus for fusion weld of plastics - Google Patents

Apparatus for fusion weld of plastics

Info

Publication number
JPH10100259A
JPH10100259A JP25498596A JP25498596A JPH10100259A JP H10100259 A JPH10100259 A JP H10100259A JP 25498596 A JP25498596 A JP 25498596A JP 25498596 A JP25498596 A JP 25498596A JP H10100259 A JPH10100259 A JP H10100259A
Authority
JP
Japan
Prior art keywords
infrared
intensity
light
reflected light
transmitted light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP25498596A
Other languages
Japanese (ja)
Inventor
Yasuo Nannichi
康夫 南日
Makoto Hirano
信 平野
Koshirou Nakajima
古史郎 中島
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP25498596A priority Critical patent/JPH10100259A/en
Publication of JPH10100259A publication Critical patent/JPH10100259A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1403—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the type of electromagnetic or particle radiation
    • B29C65/1412—Infrared [IR] radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1429—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface
    • B29C65/1435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. transmission welding
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/14—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation
    • B29C65/1477—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier
    • B29C65/1483—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using wave energy, i.e. electromagnetic radiation, or particle radiation making use of an absorber or impact modifier coated on the 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
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5229—Joining tubular articles involving the use of a socket
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
    • B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
    • B29C66/73921—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C66/912—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
    • B29C66/91221—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 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
    • B29C66/90—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
    • B29C66/91641—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 the heat or the thermal flux being non-constant over time
    • 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
    • B29C66/96—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process
    • B29C66/961—Measuring or controlling the joining process characterised by the method for implementing the controlling of the joining process involving a feedback loop mechanism, e.g. comparison with a desired value
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0822—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using IR radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C66/90—Measuring or controlling the joining process
    • B29C66/94—Measuring or controlling the joining process by measuring or controlling the time
    • 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
    • B29C66/95—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94
    • B29C66/959—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables
    • B29C66/9592—Measuring or controlling the joining process by measuring or controlling specific variables not covered by groups B29C66/91 - B29C66/94 characterised by specific values or ranges of said specific variables in explicit relation to another variable, e.g. X-Y diagrams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
    • B29K2023/04—Polymers of ethylene
    • B29K2023/06—PE, i.e. polyethylene
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2101/00—Use of unspecified macromolecular compounds as moulding material
    • B29K2101/12—Thermoplastic materials

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Thermal Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Measuring Temperature Or Quantity Of Heat (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

PROBLEM TO BE SOLVED: To secure mutual fusion weld of plastics by a method wherein a molten state of an adhesion part is judged from change in intensity of reflected light or transmitted light of infrared rays with which mutual adhesion part of thermoplastic plastics is irradiated. SOLUTION: When polyethylene materials 11, 12 are to be bonded to each other, infrared rays are radiated from an infrared heat source part 21, collected with a first optical system (concave mirror) 23, and an adhesion layer 13 and its peripheral part are irradiated with then through the polyethylenematerial 11. The adhesion layer 13 and its peripheral part are uniformly melted by heating thereby. At this time, reflected light reflected from the adhesion layer 13 of radiated infrared rays of an infrared radiation means 2 or transmitted light transmitting the adhesion layer 13 is collected, intensity of the reflected light or the transmitted light is detected per each specific time with a detector 32, and outputted to a melt judging means 40. When the adhesion layer 13 starts melting, the intensity of the reflected light is decreased, and the intensity of the transmitted light is increased reversely. A melt judging means 40 judges a molten state of the adhesion layer 13 by variation in the intensity of the reflected light or the transmitted light.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、熱可塑性のプラス
チック同士を接続するプラスチックの融着装置に関し、
特に赤外線加熱式のプラスチックの融着装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plastic fusing apparatus for connecting thermoplastic plastics to each other.
In particular, it relates to an infrared heating type plastic fusion device.

【０００２】[0002]

【従来の技術】一般に、プラスチックの中でも、ポリエ
チレンは強度が高いだけでなく、可撓性に富むことが知
られており、地震が多発する地域などでは、地中に埋設
される埋設管（水道管やガス管など）の材料として好適
である。2. Description of the Related Art In general, among plastics, polyethylene is known not only to have high strength but also to be highly flexible. In an area where an earthquake frequently occurs, a buried pipe (water supply) is buried underground. Pipes and gas pipes).

【０００３】従来、ポリエチレン製の埋設管同士を接続
する場合、電熱線を埋設した特殊な管継手を用い、これ
に電流を流しジュール熱を発生させ、熱伝導により埋設
管同士の接合部を加熱融着するＥＦ（エレクトロフュー
ジョン）法が用いられ、埋設管同士の接合部の加熱融着
の完了を、加熱温度を検出する温度センサを埋設した特
殊な管継手を用いたり、加熱溶融の圧力により浮上する
ピン構造を持った特殊な管継手を用いたり、あるいは通
電時間を管継手の種類（口径、形状など）毎に決めてお
いて判断するものが、たとえば特開平３−４７７３７号
公報に開示されている。Conventionally, when connecting buried pipes made of polyethylene, a special pipe joint in which a heating wire is buried is used, an electric current is applied to the pipe joint to generate Joule heat, and the joint between the buried pipes is heated by heat conduction. The EF (Electrofusion) method of fusion is used, and the completion of heat fusion at the joint between buried pipes is determined by using a special pipe joint with a temperature sensor embedded to detect the heating temperature or by the pressure of heat fusion. For example, Japanese Patent Application Laid-Open No. 3-47737 discloses a method in which a special pipe joint having a floating pin structure is used, or the energization time is determined for each type (diameter, shape, etc.) of the pipe joint. Have been.

【０００４】また、埋設管相互の接合面を加熱板で溶融
させた後、加熱板を取り去り、埋設管を加圧して埋設管
同士を融着し、埋設管同士の融着の完了を予め埋設管毎
に決めておいた埋設管への加圧力と加圧時間で判断する
バット融着法や、埋設管同士の接合面にポリエチレンと
馴染みがよくマイクロ波を吸収する物質、たとえばポリ
アニリンを数十％添加し、これにマイクロ波を照射して
埋設管同士の接合面を加熱融着させ、融着の完了を埋設
管の種類（口径、形状など）毎に決めておいたマイクロ
波の照射時間により判断するものが提案されている。Further, after the joint surfaces of the buried pipes are melted with a heating plate, the heating plate is removed, the buried pipes are pressurized to fuse the buried pipes, and the completion of the fusion of the buried pipes is buried in advance. The butt fusion method, which determines the pressure and pressurization time on the buried pipe determined for each pipe, or a material that absorbs microwaves, such as %, And irradiate the microwave to this to heat and fuse the joint surface between the buried pipes, and determine the completion of fusion for each type (diameter, shape, etc.) of the buried pipe, microwave irradiation time Has been proposed.

【０００５】[0005]

【発明が解決しようとする課題】ところで、前記提案の
如き特開平３−４７７３７号公報に開示されたＥＦ（エ
レクトロフュージョン）法による埋設管の接続方法で
は、ポリエチレンの内部に異物が残留し、融着時間を短
縮するために通電電流を増やすと、管継手周辺は必要以
上に高温となり、埋設管接合部の強度が劣化する他、融
着状態が部分的にしか検出されないため、融着完了が確
実に判断できないという問題点がある。By the way, in the method of connecting a buried pipe by the EF (electrofusion) method disclosed in Japanese Patent Application Laid-Open No. 3-47737 as proposed above, foreign matter remains inside the polyethylene, and If the current is increased to shorten the welding time, the area around the pipe joint will become unnecessarily hot, and the strength of the buried pipe joint will be degraded. There is a problem that it cannot be reliably determined.

【０００６】バット融着法及びマイクロ波加熱を利用す
る方法は、埋設管の融着を直接検知するものではないた
め、融着完了が正確に判断できず、従って過熱により樹
脂が劣化したり、未融着部分が残ったりするという問題
点がある。本発明は、前記のような問題点に鑑みてなさ
れたものであって、その目的とするところは、プラスチ
ック同士の融着接合を確実に行なうことができるプラス
チックの融着装置を提供することにある。Since the butt fusion method and the method using microwave heating do not directly detect the fusion of the buried pipe, the completion of fusion cannot be accurately determined, and therefore, the resin may deteriorate due to overheating, There is a problem that unfused portions remain. SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to provide a plastic fusing apparatus capable of reliably performing fusion bonding between plastics. is there.

【０００７】[0007]

【課題を解決するための手段】前記目的を達成すべく、
本発明に係るプラスチックの融着装置は、熱可塑性のプ
ラスチック相互の接着部に赤外線を照射し接着部を加熱
溶融させる赤外線照射手段と、接着部に照射された赤外
線の反射光又は透過光の強度を検出する赤外線検出手段
と、赤外線検出手段が検出する赤外線の反射光又は透過
光の強度の変化から接着部の溶融状態を判断する溶融判
断手段とを具備することを特徴とする。In order to achieve the above object,
An apparatus for fusing plastic according to the present invention includes an infrared irradiation means for irradiating infrared rays to a bonding portion between thermoplastic plastics to heat and melt the bonding portion, and an intensity of reflected light or transmitted light of the infrared light applied to the bonding portion. And a melting judging means for judging the melting state of the bonded portion from a change in the intensity of the reflected light or transmitted light of the infrared light detected by the infrared detecting means.

【０００８】また、本発明に係るプラスチックの融着装
置は、熱可塑性のプラスチック相互の接着部に赤外線を
照射し接着部を加熱溶融させる赤外線照射手段と、接着
部に照射された赤外線の反射光又は透過光の強度を検出
する赤外線検出手段と、赤外線検出手段が検出する赤外
線の反射光又は透過光の強度の変化から接着部の溶融状
態を判断し、溶融状態に基づいて赤外線照射手段の赤外
線の照射出力を制御する溶融制御手段とを具備すること
を特徴とする。Further, the plastic fusing apparatus according to the present invention includes an infrared irradiation means for irradiating infrared rays to a bonding portion between thermoplastic plastics to heat and melt the bonding portion, and a reflected light of the infrared light irradiated to the bonding portion. Or, the infrared detecting means for detecting the intensity of the transmitted light, and the melting state of the bonding portion is determined from the change in the intensity of the reflected light or transmitted light of the infrared light detected by the infrared detecting means, and the infrared light of the infrared irradiation means is determined based on the melting state. And a melting control means for controlling the irradiation output of.

【０００９】従って、本発明は、溶融判断手段により赤
外線検出手段が検出する赤外線の反射光又は透過光の強
度の変化からプラスチック相互の接着部の溶融状態が判
断される。また、溶融制御手段により赤外線検出手段が
検出する赤外線の反射光又は透過光の強度の変化から接
着部の溶融状態が判断され、この判断結果に基づいて赤
外線照射手段の赤外線照射出力が制御される。よって、
プラスチックの赤外線照射部位における溶融が過不足な
く行なわれる。Therefore, according to the present invention, the melting state of the bonded portion between the plastics is determined from the change in the intensity of the reflected or transmitted infrared light detected by the infrared detecting means by the melting determining means. Further, the melting state of the bonding portion is determined from the change in the intensity of the reflected light or transmitted light of the infrared light detected by the infrared detecting means by the melting control means, and the infrared irradiation output of the infrared irradiating means is controlled based on the judgment result. . Therefore,
The melting of the plastic at the infrared irradiation site is performed without excess or shortage.

【００１０】[0010]

【発明の実施の形態】以下、本発明の実施の形態を図面
に基づいて詳細に説明する。実施の形態を説明するに当
たって、同一機能を奏するものは同じ符号を付して説明
する。図１は、本発明の一実施の形態に係るプラスチッ
クの融着装置の概略ブロック図、図２（ａ），（ｂ）
は、赤外線の照射と赤外線の反射光及び透過光の強度の
検出を説明する図、図３（ａ）〜（ｄ）は、接続される
ポリエチレン管の説明図、図４は、本発明の一実施の形
態に係るプラスチックの融着装置によるポリエチレン管
の接続を説明する正面図、図５は、本発明の他の実施の
形態に係るプラスチックの融着装置の概略ブロック図で
ある。なお、図３（ｃ）は、図３（ｂ）のＡ−Ａ断面図
を示す。Embodiments of the present invention will be described below in detail with reference to the drawings. In describing the embodiments, those having the same functions will be denoted by the same reference numerals. FIG. 1 is a schematic block diagram of an apparatus for fusing plastic according to an embodiment of the present invention, and FIGS. 2 (a) and 2 (b).
FIGS. 3A to 3D are views for explaining irradiation of infrared light and detection of intensity of reflected light and transmitted light of infrared light, FIGS. 3A to 3D are explanatory views of a connected polyethylene pipe, and FIG. FIG. 5 is a front view illustrating connection of polyethylene pipes by a plastic fusion device according to an embodiment. FIG. 5 is a schematic block diagram of a plastic fusion device according to another embodiment of the present invention. FIG. 3C is a cross-sectional view taken along the line AA of FIG. 3B.

【００１１】図１に示すプラスチックの融着装置は、プ
ラスチック、たとえばポリエチレン材１１，１２に赤外
線を照射する赤外線照射手段２０と、ポリエチレン材１
１，１２より反射する赤外線の反射光又はポリエチレン
材１１，１２を透過する赤外線の透過光の強度を検出す
る赤外線検出手段３０と、赤外線検出手段３０が検出す
る赤外線の反射光又は透過光の強度の変化に基づいて赤
外線照射部位の溶融状態を判断する溶融判断手段４０と
から概略構成されている。An apparatus for fusing plastic shown in FIG. 1 includes an infrared irradiation means 20 for irradiating infrared rays to plastics, for example, polyethylene materials 11 and 12, and a polyethylene material 1
Infrared detecting means 30 for detecting the intensity of the reflected light of infrared light reflected from the infrared rays 1 or 12 or transmitted light of the infrared light transmitted through the polyethylene materials 11 and 12, and the intensity of the reflected or transmitted infrared light detected by the infrared light detecting means 30. And a melting judging means 40 for judging the melting state of the infrared irradiation part on the basis of the change.

【００１２】ポリエチレン材１１には接着層１３が形成
され、ポリエチレン材１２は接着層１３に面接触するよ
うに配置されている。赤外線照射手段２０は、ハロゲン
ランプなどの赤外線熱源部２１及び赤外線熱源部２１か
ら放射される赤外線を集光する凹面鏡などの第１光学系
２２を有している。赤外線検出手段３０は、ポリエチレ
ン材１１と１２の界面からの赤外線の反射光又はポリエ
チレン材１１と１２の界面を透過する透過光を受光する
導光管や集光ミラーなどの第２光学系３１と、赤外線の
反射光又は透過光の強度を検出する検知器３２とを有す
る（図２参照）。An adhesive layer 13 is formed on the polyethylene material 11, and the polyethylene material 12 is arranged so as to be in surface contact with the adhesive layer 13. The infrared irradiating means 20 has an infrared heat source section 21 such as a halogen lamp and a first optical system 22 such as a concave mirror for condensing infrared rays radiated from the infrared heat source section 21. The infrared detecting means 30 includes a second optical system 31 such as a light guide tube or a condensing mirror that receives reflected light of infrared light from the interface between the polyethylene materials 11 and 12 or transmitted light transmitted through the interface between the polyethylene materials 11 and 12. And a detector 32 for detecting the intensity of infrared reflected light or transmitted light (see FIG. 2).

【００１３】ポリエチレン材１１と１２を接合する場合
は、赤外線熱源部（ハロゲンランプ）２１より赤外線を
放射し、これを第１光学系（凹面鏡）２２で集光し、ポ
リエチレン材１１を通して接着層１３やその周辺部（ポ
リエチレン材１１，１２の一部分）に照射する。これに
より、接着層１３やその周辺部を均一に加熱溶融する。When the polyethylene materials 11 and 12 are joined, infrared rays are radiated from an infrared heat source section (halogen lamp) 21, collected by a first optical system (concave mirror) 22 and passed through the polyethylene material 11 to form an adhesive layer 13. And its peripheral parts (parts of the polyethylene materials 11 and 12). Thereby, the adhesive layer 13 and its peripheral portion are uniformly heated and melted.

【００１４】このとき、赤外線照射手段２０の照射赤外
線が接着層１３より反射する反射光あるいは接着層１３
を透過する透過光を第２光学系３１で集光し、検知器３
２でその反射光又は透過光の強度を一定時間毎に検知
し、溶融判断手段４０に出力する。接着層１３が溶融を
開始すると、反射光強度は減少し、透過光強度は逆に増
大する。溶融判断手段４０は接着層１３の溶融状態を、
前記反射光あるいは透過光の強度の変化により判断す
る。At this time, the infrared rays irradiated by the infrared irradiating means 20 are reflected light reflected from the adhesive layer 13 or the reflected infrared light.
The transmitted light that passes through the optical system is condensed by the second optical system 31 and is detected by the detector 3.
In step 2, the intensity of the reflected light or transmitted light is detected at regular intervals, and output to the melting determination means 40. When the adhesive layer 13 starts melting, the intensity of the reflected light decreases and the intensity of the transmitted light increases. The melting determination means 40 determines the melting state of the adhesive layer 13 by:
The determination is made based on a change in the intensity of the reflected light or the transmitted light.

【００１５】そして、接着層１３の溶融が完了したと判
断されると、赤外線の照射を停止する。その後、接着層
１３及びその周辺部の加熱溶融部分は室温まで冷却さ
れ、ポリエチレン材１１と１２が接着する。なお、ポリ
エチレン材１１，１２の肉厚を４ｍｍ、接着層１３をポ
リアニリン２０％を含有する肉厚０．０５ｍｍのポリエ
チレン、赤外線熱源部（ハロゲンランプ）２１の電力を
１５０Ｗとして融着させたところ、良好な結果が得られ
た。When it is determined that the melting of the adhesive layer 13 is completed, the irradiation of the infrared rays is stopped. After that, the adhesive layer 13 and the heat-melted portion around the adhesive layer 13 are cooled to room temperature, and the polyethylene materials 11 and 12 are bonded. The thickness of the polyethylene materials 11 and 12 was 4 mm, the adhesive layer 13 was polyethylene having a thickness of 0.05 mm containing 20% of polyaniline, and the infrared heat source (halogen lamp) 21 was fused at an electric power of 150 W. Good results were obtained.

【００１６】図３及び図４に示すように、ポリエチレン
管継手１４とポリエチレン管１５を接続する場合は、ま
ず、ポリエチレン管継手１４の内面部分に接着層１６を
環状に内周面がほぼ均一の高さになるように埋設し、ポ
リエチレン管１５の一端部を接着層１６に接触するよう
にポリエチレン管継手１４内に嵌入する。As shown in FIGS. 3 and 4, when connecting the polyethylene pipe joint 14 and the polyethylene pipe 15, first, an adhesive layer 16 is annularly formed on the inner surface of the polyethylene pipe joint 14 so that the inner peripheral surface is substantially uniform. The polyethylene pipe 15 is embedded so as to have a height, and one end of the polyethylene pipe 15 is fitted into the polyethylene pipe joint 14 so as to be in contact with the adhesive layer 16.

【００１７】そして、赤外線照射手段２０及び赤外線検
出手段３０を接着層１６の周方向に移動させながら、赤
外線熱源部（ハロゲンランプ）２１より赤外線を放射
し、これを第１光学系（凹面鏡）２２により集光し、ポ
リエチレン管継手１４を通して接着層１６やその周辺部
（ポリエチレン管継手１４やポリエチレン管１５の一部
分）に照射する。これにより、接着層１６及びその周辺
部が加熱され、均一に軟化溶融する。While moving the infrared irradiating means 20 and the infrared detecting means 30 in the circumferential direction of the adhesive layer 16, infrared rays are radiated from an infrared heat source section (halogen lamp) 21, and this is radiated to a first optical system (concave mirror) 22. And irradiates the adhesive layer 16 and its peripheral portion (a part of the polyethylene pipe joint 14 and the polyethylene pipe 15) through the polyethylene pipe joint 14. As a result, the adhesive layer 16 and its peripheral portion are heated and uniformly softened and melted.

【００１８】このとき、接着層１６より反射する照射赤
外線の反射光を第２光学系３１で集光し、検知器３２で
反射光の強度を一定時間毎に検知し、溶融判断手段４０
に出力する。接着層１３が溶融を開始すると、反射光強
度は減少し、透過光強度は逆に増大する。溶融判断手段
４０は接着層１６の溶融状態を反射光の強度の変化によ
り判断する。At this time, the reflected light of the irradiation infrared rays reflected from the adhesive layer 16 is condensed by the second optical system 31 and the intensity of the reflected light is detected by the detector 32 at regular time intervals.
Output to When the adhesive layer 13 starts melting, the intensity of the reflected light decreases and the intensity of the transmitted light increases. The melting judging means 40 judges the melting state of the adhesive layer 16 based on the change in the intensity of the reflected light.

【００１９】そして、接着層１６の溶融が完了したと判
断されると、赤外線の照射を停止する。その後、接着層
１６は室温まで冷却され、ポリエチレン管継手１４とポ
リエチレン管１５が接続する。When it is determined that the melting of the adhesive layer 16 is completed, the irradiation of the infrared rays is stopped. Thereafter, the adhesive layer 16 is cooled to room temperature, and the polyethylene pipe joint 14 and the polyethylene pipe 15 are connected.

【００２０】また、ポリエチレン以外で波長が２〜１２
μｍの赤外線が透過し難いプラスチックを接続する場合
は、赤外線照射手段２０側のプラスチックを透明にする
ことで、赤外線を透過し易くすることができる。また、
赤外線照射部位の範囲（大きさ）は、赤外線の焦点位
置、ハロゲンランプのフィラメントの大きさ、温度（電
流）、赤外線集光部の明るさ、照射時間あるいは赤外線
熱源部２１の移動速度などのパラメータで変えることが
できる。さらに、プラスチックの肉厚に応じて、赤外線
の集光位置を変えることで良好な赤外線照射が可能とな
る。In addition, when the wavelength is 2 to 12 other than polyethylene.
In the case of connecting a plastic which does not easily transmit infrared rays of μm, the plastic on the side of the infrared irradiation means 20 can be made transparent so that the infrared ray can be easily transmitted. Also,
The range (size) of the infrared irradiation area includes parameters such as the focal position of the infrared light, the size of the filament of the halogen lamp, the temperature (current), the brightness of the infrared light condensing part, the irradiation time, and the moving speed of the infrared heat source part 21. Can be changed with. Further, by changing the focusing position of the infrared ray according to the thickness of the plastic, favorable infrared irradiation can be performed.

【００２１】図５に示すプラスチックの融着装置は、ポ
リエチレン材１１，１２に赤外線を照射する赤外線照射
手段２０と、ポリエチレン材１１，１２より反射する赤
外線の反射光又はポリエチレン材１１，１２を透過する
赤外線の透過光の強度を検出する赤外線検出手段３０
と、赤外線検出手段３０が検出する赤外線の反射光又は
透過光の強度の変化に基づいて赤外線照射部位の溶融状
態を制御する溶融制御手段５０とから概略構成されてい
る。The plastic fusing apparatus shown in FIG. 5 includes an infrared irradiation means 20 for irradiating the polyethylene materials 11 and 12 with infrared rays, and an infrared ray reflected from the polyethylene materials 11 and 12 or transmitting the polyethylene materials 11 and 12. Detecting means 30 for detecting the intensity of transmitted infrared light
And a melting control unit 50 that controls the melting state of the infrared irradiation site based on a change in the intensity of the reflected or transmitted infrared light detected by the infrared detection unit 30.

【００２２】ポリエチレン材１１は接着層１３が形成さ
れ、ポリエチレン材１２は接着層１３に面接触するよう
に配置されている。赤外線照射手段２０は、赤外線を放
射する赤外線熱源部２１及び赤外線熱源部２１から放射
される赤外線を集光する第１光学系２２を有している。
赤外線検出手段３０は、ポリエチレン材１１と１２の界
面からの赤外線の反射光又はポリエチレン材１１と１２
の界面を透過する透過光を受光する第２光学系３１と、
赤外線の反射光又は透過光の強度を検出する検知器３２
とを有する。The polyethylene material 11 has an adhesive layer 13 formed thereon, and the polyethylene material 12 is disposed so as to be in surface contact with the adhesive layer 13. The infrared irradiation means 20 includes an infrared heat source 21 that emits infrared light and a first optical system 22 that collects infrared light emitted from the infrared heat source 21.
The infrared detecting means 30 detects the reflected light of infrared rays from the interface between the polyethylene materials 11 and 12 or the polyethylene materials 11 and 12.
A second optical system 31 that receives transmitted light transmitted through the interface of
Detector 32 for detecting the intensity of infrared reflected light or transmitted light
And

【００２３】溶融制御手段５０は、検知器３２からの検
知信号の変化により赤外線照射部位の溶融状態を判断す
る溶融判断部５１及び当該溶融状態に基づいて赤外線熱
源部２１の赤外線の照射を制御する制御部５２を有す
る。従って、かかるプラスチックの融着装置によりポリ
エチレン材１１と１２を接合する場合は、赤外線熱源部
２１より赤外線を放射し、第１光学系２２で集光して、
接着層１３やその周辺部に照射することで、接着層１３
やその周辺部を均一に加熱溶融する。The melting control means 50 controls the irradiation of infrared rays from the infrared heat source section 21 based on the melting state, and a melting judging section 51 for judging the melting state of the infrared irradiation portion based on a change in the detection signal from the detector 32. It has a control unit 52. Therefore, when the polyethylene materials 11 and 12 are joined by such a plastic fusion device, infrared rays are radiated from the infrared heat source 21 and condensed by the first optical system 22.
By irradiating the adhesive layer 13 and its periphery, the adhesive layer 13
And its surroundings are uniformly heated and melted.

【００２４】このとき、赤外線照射手段２０の照射赤外
線が接着層１３より反射する反射光あるいは接着層１３
を透過する透過光を第２光学系３１で集光し、検知器３
２でその反射光又は透過光の強度を一定時間毎に検知
し、溶融判断部５１に出力する。At this time, the infrared ray irradiated by the infrared ray irradiating means 20 is reflected light reflected from the adhesive layer 13 or the reflected infrared ray.
The transmitted light that passes through the optical system is condensed by the second optical system 31 and is detected by the detector 3.
In 2, the intensity of the reflected light or transmitted light is detected at regular intervals, and output to the melting determination unit 51.

【００２５】検知器３２の出力信号は、反射光強度の検
出の場合には、図６（ａ）に示すように溶融が開始する
と減少し、透過光強度の検出の場合には、図６（ｂ）に
示すように溶融が開始すると増大する。溶融判断部５１
では、この出力信号の変化点ｔ1 又はｔ2 を捉えると同
時に制御部５２に対して信号を出力する。変化点ｔ1，
ｔ2 を捉えるには、検知器３２の出力をある一定時間間
隔でサンプリングし、その前後の出力値が大きく変化し
たところを変化点とすればよい。この変化点が溶融開始
に相当する。In the case of detecting the intensity of reflected light, the output signal of the detector 32 decreases when melting starts, as shown in FIG. 6A, and when the intensity of transmitted light is detected, as shown in FIG. It increases when melting starts as shown in b). Melting judgment unit 51
In this case, a signal is output to the control unit 52 at the same time as the change point t 1 or t 2 of the output signal is detected. Change point t 1 ,
In order to capture t 2 , the output of the detector 32 may be sampled at a certain fixed time interval, and a point where the output value before and after the detector 32 largely changes may be set as a change point. This change point corresponds to the start of melting.

【００２６】溶融開始信号を受けた制御部５２では、図
６（ｃ）に示すように、予め定められた一定時間Ｔだけ
経過した後に、赤外線熱源部２１に赤外線照射を停止す
るための信号を出力し、赤外線の照射を停止することで
プラスチックの溶融を完了させる。The controller 52, which has received the melting start signal, sends a signal for stopping the irradiation of the infrared heat source section 21 to the infrared heat source section 21 after a predetermined time T has elapsed, as shown in FIG. Output and stop the infrared irradiation to complete the melting of the plastic.

【００２７】また、制御部５１では赤外線の照射停止だ
けではなく、赤外線熱源部２１への電力供給を加減して
赤外線出力を制御することも可能である。例えば、赤外
線照射を開始してから一定時間を経過しても融着開始信
号が制御部５１に入力されなかった場合は、赤外線出力
を増加させて溶融を加速させたり、あるいは、赤外線熱
源部２１を接着部に合わせて動かしながら線状に溶融す
る場合などには、最初の点融着が完了してしまえば、そ
の周辺部もある程度加熱されているので、後の溶融は赤
外線出力を下げて溶融をすることができる。The control unit 51 can control the infrared output by controlling the power supply to the infrared heat source unit 21 in addition to stopping the infrared irradiation. For example, if the fusion start signal is not input to the control unit 51 within a certain time after starting the infrared irradiation, the infrared output is increased to accelerate the melting, or the infrared heat source unit 21 When the first point fusion is completed, the surrounding area is also heated to some extent, so that the subsequent fusion lowers the infrared output and Can be melted.

【００２８】このように、本実施の形態のプラスチック
の融着装置は、接着層１３，１６の溶融状態に基づいて
赤外線の照射が制御されるので、プラスチックの赤外線
照射部位における赤外線の照射加熱が過不足なく行なわ
れる。As described above, in the plastic fusing apparatus of the present embodiment, since the irradiation of infrared rays is controlled based on the melting state of the adhesive layers 13 and 16, the irradiation and heating of the infrared rays at the infrared irradiation portions of the plastic are performed. It is done without excess or deficiency.

【００２９】なお、ここではポリエチレンの融着につい
て説明したが、熱可塑性のプラスチックとしては、ポリ
エチレン以外にも塩化ビニル、ポリプロピレン、ポリブ
デン等があり、本発明はこれらポリエチレン以外の熱可
塑性プラスチック一般に適用できるものである。Although the fusion of polyethylene has been described here, examples of the thermoplastic plastic other than polyethylene include vinyl chloride, polypropylene, and polybutene. The present invention can be applied to thermoplastic thermoplastics other than polyethylene. Things.

【００３０】以上、本発明の実施の形態のプラスチック
材の融着装置について詳述したが、本発明は、前記実施
の形態記載のプラスチック材の融着装置に限定されるも
のではなく、本発明の特許請求の範囲に記載されている
発明の精神を逸脱しない範囲で、設計において種々の変
更ができるものである。Although the plastic material fusing apparatus according to the embodiment of the present invention has been described in detail, the present invention is not limited to the plastic material fusing apparatus described in the above-described embodiment. Various changes can be made in the design without departing from the spirit of the invention described in the appended claims.

【００３１】[0031]

【発明の効果】以上の説明から理解されるように、本発
明のプラスチックの融着装置は、赤外線検出手段が検出
する赤外線の反射光又は透過光の強度の変化からプラス
チック相互の接着部の溶融状態を判断する溶融判断手段
を有し、又は、赤外線検出手段が検出する赤外線の反射
光又は透過光の強度の変化からプラスチック相互の接着
部の溶融状態を判断し、この判断結果に基づいて赤外線
照射手段の赤外線照射出力を制御する溶融制御手段を有
するので、プラスチックの赤外線照射部位における赤外
線の溶融を過不足なく行なうことができる。従って、プ
ラスチックを均一かつ確実に融着することができ、プラ
スチック接合の品質を向上することができる。As will be understood from the above description, the plastic fusing apparatus according to the present invention is capable of melting the bonding portion between the plastics based on the change in the intensity of the reflected or transmitted infrared light detected by the infrared detecting means. It has melting judgment means for judging the state, or judges the melting state of the bonding portion between the plastics from the change in the intensity of the reflected light or transmitted light of the infrared light detected by the infrared detecting means, and based on the judgment result, Since there is a melting control means for controlling the infrared irradiation output of the irradiating means, it is possible to perform the melting of the infrared rays at the infrared irradiation portion of the plastic without excess or shortage. Therefore, the plastic can be uniformly and reliably fused, and the quality of the plastic joint can be improved.

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

【図１】本発明の一実施の形態を示すプラスチックの融
着装置の概略ブロック図。FIG. 1 is a schematic block diagram of a plastic fusing apparatus according to an embodiment of the present invention.

【図２】（ａ）は本発明の一実施の形態を示すプラスチ
ックの融着装置における赤外線の照射を説明する図、
（ｂ）は本発明の一実施の形態を示すプラスチックの融
着装置における赤外線の反射光及び透過光の強度の検出
を説明する図。FIG. 2A is a diagram illustrating irradiation of infrared rays in a plastic fusing apparatus according to an embodiment of the present invention;
FIG. 2B is a diagram for explaining detection of the intensity of reflected and transmitted infrared light in the plastic fusing apparatus according to the embodiment of the present invention.

【図３】（ａ）は一方のポリエチレン管の正面図、
（ｂ）は一方のポリエチレン管の側面図、（ｃ）は
（ｂ）のＡ−Ａ断面図、（ｄ）は一方のポリエチレン管
と接続する他方のポリエチレン管の正面図。FIG. 3 (a) is a front view of one polyethylene pipe,
(B) is a side view of one polyethylene pipe, (c) is an AA cross-sectional view of (b), and (d) is a front view of the other polyethylene pipe connected to one polyethylene pipe.

【図４】本発明の一実施の形態を示すプラスチックの融
着装置によるポリエチレン管の接続を説明する正面図。FIG. 4 is a front view illustrating the connection of the polyethylene pipes by the plastic fusion device according to the embodiment of the present invention.

【図５】本発明の他の実施の形態を示すプラスチックの
融着装置の概略ブロック図。FIG. 5 is a schematic block diagram of a plastic fusing apparatus showing another embodiment of the present invention.

【図６】（ａ）は反射光強度の変化を示す図、（ｂ）は
透過光強度の変化を示す図、（ｃ）は制御部の動作を説
明する図。6A is a diagram illustrating a change in reflected light intensity, FIG. 6B is a diagram illustrating a change in transmitted light intensity, and FIG. 6C is a diagram illustrating an operation of a control unit.

【符号の説明】[Explanation of symbols]

１１，１２ ポリエチレン材 １３，１６ 接着層 ２０ 赤外線照射手段 ２１ 赤外線熱源部 ２２ 第１光学系 ３０ 赤外線検出手段 ３１ 第２光学系 ３２ 検知器 ４０ 溶融判断手段 ５０ 溶融制御手段 ５１ 溶融判断部 ５２ 制御部 11, 12 Polyethylene material 13, 16 Adhesive layer 20 Infrared ray irradiating means 21 Infrared ray heat source part 22 First optical system 30 Infrared ray detecting means 31 Second optical system 32 Detector 40 Melting judging means 50 Melting controlling means 51 Melting judging part 52 Control part

───────────────────────────────────────────────────── フロントページの続き (72)発明者 中島 古史郎 茨城県つくば市和台32 積水化学工業株式 会社内 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Furushiro Nakajima 32 Wadai, Tsukuba, Ibaraki Sekisui Chemical Co., Ltd.

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】 熱可塑性のプラスチック相互の接着部に
赤外線を照射し前記接着部を加熱溶融させる赤外線照射
手段と、前記接着部に照射された前記赤外線の反射光又
は透過光の強度を検出する赤外線検出手段と、前記赤外
線検出手段が検出する前記赤外線の反射光又は透過光の
強度の変化から前記接着部の溶融状態を判断する溶融判
断手段とを具備することを特徴するプラスチックの融着
装置。1. An infrared irradiation means for irradiating infrared rays to a bonding portion between thermoplastic plastics to heat and melt the bonding portion, and detecting the intensity of reflected light or transmitted light of the infrared light applied to the bonding portion. A plastic fusion device comprising: an infrared detection unit; and a fusion determination unit configured to determine a fusion state of the bonding unit based on a change in intensity of the infrared reflected light or transmitted light detected by the infrared detection unit. . 【請求項２】 熱可塑性のプラスチック相互の接着部に
赤外線を照射し前記接着部を加熱溶融させる赤外線照射
手段と、前記接着部に照射された前記赤外線の反射光又
は透過光の強度を検出する赤外線検出手段と、前記赤外
線検出手段が検出する前記赤外線の反射光又は透過光の
強度の変化から前記接着部の溶融状態を判断し、前記溶
融状態に基づいて前記赤外線照射手段の赤外線の照射出
力を制御する溶融制御手段とを具備することを特徴する
プラスチックの融着装置。2. An infrared irradiating means for irradiating an infrared ray to a bonding portion between thermoplastic plastics to heat and melt the bonding portion, and detecting an intensity of reflected light or transmitted light of the infrared light applied to the bonding portion. Infrared detecting means, judging the melting state of the bonding portion from the change in the intensity of the reflected light or transmitted light of the infrared light detected by the infrared detecting means, based on the melting state, the irradiation output of the infrared irradiation means of the infrared irradiation means And a fusion control means for controlling the melting of the plastic.
JP25498596A 1996-09-26 1996-09-26 Apparatus for fusion weld of plastics Pending JPH10100259A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP25498596A JPH10100259A (en) 1996-09-26 1996-09-26 Apparatus for fusion weld of plastics

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP25498596A JPH10100259A (en) 1996-09-26 1996-09-26 Apparatus for fusion weld of plastics

Publications (1)

Publication Number Publication Date
JPH10100259A true JPH10100259A (en) 1998-04-21

Family

ID=17272613

Family Applications (1)

Application Number Title Priority Date Filing Date
JP25498596A Pending JPH10100259A (en) 1996-09-26 1996-09-26 Apparatus for fusion weld of plastics

Country Status (1)

Country Link
JP (1) JPH10100259A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002090953A1 (en) * 2001-05-05 2002-11-14 Huf Tools Gmbh Method for inspecting a weld seam in a workpiece made of weldable plastic, and device for carrying out this method
EP1304560A1 (en) * 2001-10-22 2003-04-23 Laserquipment AG Method for quality-control of plastic weld seams
US6816182B2 (en) 2000-03-14 2004-11-09 Masanori Kubota Radiation welding and imaging apparatus and method for using the same
DE102008016019A1 (en) * 2008-03-25 2009-10-01 Jenoptik Automatisierungstechnik Gmbh Method for quality testing a weld of plastic components welded in the lap joint
CN110271198A (en) * 2019-07-23 2019-09-24 哈尔滨博奥环境技术有限公司 A kind of thermoplastic welding procedure and welding equipment

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6816182B2 (en) 2000-03-14 2004-11-09 Masanori Kubota Radiation welding and imaging apparatus and method for using the same
WO2002090953A1 (en) * 2001-05-05 2002-11-14 Huf Tools Gmbh Method for inspecting a weld seam in a workpiece made of weldable plastic, and device for carrying out this method
US7268866B2 (en) 2001-05-05 2007-09-11 Huf Tools Gmbh Method for inspecting a weld seam in a workpiece made of weldable plastic and device for carrying out this method
EP1304560A1 (en) * 2001-10-22 2003-04-23 Laserquipment AG Method for quality-control of plastic weld seams
DE102008016019A1 (en) * 2008-03-25 2009-10-01 Jenoptik Automatisierungstechnik Gmbh Method for quality testing a weld of plastic components welded in the lap joint
CN110271198A (en) * 2019-07-23 2019-09-24 哈尔滨博奥环境技术有限公司 A kind of thermoplastic welding procedure and welding equipment

Similar Documents

Publication Publication Date Title
US6270599B1 (en) Heat-welding of plastics by radiation
US6444946B1 (en) Method and apparatus for welding
EP0644826B1 (en) Joining bodies of thermoplastic material
US6858104B2 (en) Apparatus and method for closed-loop control of laser welder for welding polymeric catheter components
JP2004525382A (en) Method for monitoring weld seams in workpieces made of weldable plastic and apparatus for carrying out this method
JP4113752B2 (en) Joining device
JPH10100259A (en) Apparatus for fusion weld of plastics
EP0743897B1 (en) Method of joining elongate hollow members
CN100471656C (en) Laser joining method for structured plastics
Wippo et al. Evaluation of a pyrometric-based temperature measuring process for the laser transmission welding
JP4267286B2 (en) Resin material welding method and resin material welding apparatus
JPH10100258A (en) Apparatus for fusion weld of plastics
KR20160094483A (en) Laser welding Method and apparatus for automobile lamp
JPH10100257A (en) Heat fusion bonding apparatus for plastic
JPH10166451A (en) Fusion-bonding of plastics and fusion-bonding device
JPH10166452A (en) Fusion-bonding of plastics by infrared rays and infrared absorber
JP2004188802A (en) Laser welding method of resin member
JPH11147258A (en) Electric fusing method and apparatus therefor
JP7470913B2 (en) Laser welding equipment and laser processing equipment
GB2278571A (en) Joining members using heat from a light source
KR101208217B1 (en) Laser welding method and apparatus for automobile lamp
JPH10166453A (en) Plastics fusion-bonding device
JP4185405B2 (en) Bonding method between resin materials
JPS59212184A (en) Control method of co2 laser welding
JP2001006872A (en) Device for heating member formed of microwave absorptive plastic