JPH07156272A - Method for fusion-bonding plastic molding - Google Patents

Method for fusion-bonding plastic molding

Info

Publication number
JPH07156272A
JPH07156272A JP5329788A JP32978893A JPH07156272A JP H07156272 A JPH07156272 A JP H07156272A JP 5329788 A JP5329788 A JP 5329788A JP 32978893 A JP32978893 A JP 32978893A JP H07156272 A JPH07156272 A JP H07156272A
Authority
JP
Japan
Prior art keywords
welding
coils
welded
welded portion
plastic
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
JP5329788A
Other languages
Japanese (ja)
Inventor
Takao Yoshida
孝夫 吉田
Keinosuke Isono
啓之介 磯野
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.)
Material Engineering Technology Laboratory Inc
Original Assignee
Material Engineering Technology Laboratory Inc
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 Material Engineering Technology Laboratory Inc filed Critical Material Engineering Technology Laboratory Inc
Priority to JP5329788A priority Critical patent/JPH07156272A/en
Publication of JPH07156272A publication Critical patent/JPH07156272A/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
    • 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
    • B29C66/814—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 design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81431—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined comprising a single cavity, e.g. a groove
    • 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
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/32—Induction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/13—Single flanged joints; Fin-type joints; Single hem joints; Edge joints; Interpenetrating fingered joints; Other specific particular designs of joint cross-sections not provided for in groups B29C66/11 - B29C66/12
    • B29C66/133—Fin-type joints, the parts to be joined being flexible
    • 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
    • B29C66/20—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines
    • B29C66/24—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight
    • B29C66/242—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours
    • B29C66/2422—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical
    • B29C66/24221—Particular design of joint configurations particular design of the joint lines, e.g. of the weld lines said joint lines being closed or non-straight said joint lines being closed, i.e. forming closed contours being circular, oval or elliptical being circular
    • 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
    • B29C66/53—Joining single elements to tubular articles, hollow articles or bars
    • B29C66/532—Joining single elements to the wall of tubular articles, hollow articles or bars
    • B29C66/5326—Joining single elements to the wall of tubular articles, hollow articles or bars said single elements being substantially flat
    • B29C66/53261—Enclosing tubular articles between substantially flat elements
    • B29C66/53262—Enclosing spouts between the walls of bags, e.g. of medical bags
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
    • B29C66/832—Reciprocating joining or pressing tools
    • B29C66/8322—Joining or pressing tools reciprocating along one axis
    • 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
    • B29C66/80—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
    • B29C66/81261—Thermal properties, e.g. thermal conductivity, thermal expansion coefficient
    • 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
    • B29C66/814—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 design of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/8141—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined
    • B29C66/81411—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat
    • B29C66/81421—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave
    • B29C66/81423—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 design of the pressing elements, e.g. of the welding jaws or clamps characterised by the surface geometry of the part of the pressing elements, e.g. welding jaws or clamps, coming into contact with the parts to be joined characterised by its cross-section, e.g. transversal or longitudinal, being non-flat being convex or concave being concave
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7148—Blood bags, medical bags

Abstract

PURPOSE:To provide a method for fusion-bonding a plastic molding in which the matter of stable quality is obtained in a short time and an automation of its manufacturing line can be facilitated by utilizing a high-frequency induction in the fusion-bonding of matters formed of various thermoplastic resins. CONSTITUTION:The method for fusion-bonding a plastic molding comprises the steps of so moving to superpose at least one 1 of two coils 1 initially so separated as to be easily set at parts 5 to be fusion-bonded of the matter as to position the parts 5 to be fusion-bonded between two high-frequency induction coils 1 or at the vicinity of its boundary, bringing metal heating medium 6 in direct or indirect contact with the parts 5 to be fusion-bonded, and supplying a high-frequency current to the two coils 1 to generate heat from the medium 6 by high-frequency induction. Further, the method comprises the steps of heating to fusion-bond the parts 5 to be fusion-bonded, cooling it, and then moving the coils 1 to form a peripheral space of the parts 5 to be fusion-bonded, thereby facilitating easy removal of the parts 5.

Description

【発明の詳細な説明】Detailed Description of the Invention

【０００１】[0001]

【産業上の利用分野】本発明は、高周波誘導によるプラ
スチック形成物の溶着方法に関するものであり、さらに
詳しく述べると、高周波誘導により加熱媒体を発熱さ
せ、この熱によりプラスチック形成物の被溶着部を加熱
・溶融して接合するプラスチック形成物の溶着方法に関
するものである。本発明は、例えば、輸液容器、輸血容
器等の医療用容器の製造方法として、また、液状または
ペースト状の食品または工業製品の充填用容器の製造方
法として、すなわち、充填、注入、排出、または、移送
するための管状の開口部を有する袋状の容器の製造方法
として利用される。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of welding a plastic molding by high frequency induction. More specifically, the heating medium is heated by the high frequency induction, and this heat heats the welded portion of the plastic molding. The present invention relates to a method for welding a plastic formed product by heating, melting and joining. The present invention, for example, as a method for producing a medical container such as an infusion container or a blood transfusion container, and as a method for producing a container for filling a liquid or pasty food or industrial product, that is, filling, injecting, discharging, or It is used as a method for manufacturing a bag-shaped container having a tubular opening for transferring.

【０００２】[0002]

【従来の技術】近年、医療用容器および食品用容器の素
材としては、人体に対してより安全性が高く、安定性が
良く、可塑剤を使用していない非極性樹脂を使用する傾
向が強くなってきており、さらに、安価な汎用樹脂、す
なわち、ポリエチレン系樹脂、ポリプロピレン系樹脂等
のオレフィン系の樹脂が好まれて使用されるようになっ
てきた。これらの非極性樹脂を含む各種の素材から前記
の容器を製造する方法の一つとして、従来より、高周波
誘導を利用したプラスチック形成物の溶着方法が幾つか
知られている。2. Description of the Related Art In recent years, as a material for medical containers and food containers, nonpolar resins, which are safer for humans, have good stability, and do not use plasticizers, are strongly used. Further, inexpensive general-purpose resins, that is, olefin resins such as polyethylene resins and polypropylene resins have been favored and used. As one of the methods for manufacturing the above-mentioned container from various materials including these non-polar resins, there have been conventionally known some methods for welding a plastic formed product using high frequency induction.

【０００３】例えば、高周波誘導により発熱する加熱媒
体をプラスチック形成物の被溶着部に埋め込みまたは挟
み込み、次に、該被溶着部に渦巻状のコイルまたは多重
巻きのコイルを近づけるか、該被溶着部を多重巻きのコ
イルの内側に挿入するかして、高周波誘導により該加熱
媒体を加熱して、この熱により該プラスチック形成物の
被溶着部を溶融して接合する方法、高周波誘導により発
熱する加熱媒体をプラスチック形成物の被溶着部に直接
または間接的に接触または近接させ、該被溶着部を前記
と同様の方法で加熱して、この熱により該プラスチック
形成物の被溶着部を溶融して接合する方法等が知られて
いる。For example, a heating medium that generates heat by high-frequency induction is embedded or sandwiched in a welded portion of a plastic forming material, and then a spiral coil or a multi-turn coil is brought close to the welded portion or the welded portion. By inserting the inside of a coil of multiple windings, heating the heating medium by high-frequency induction, and melting and joining the welded part of the plastics formation by this heat, heating that generates heat by high-frequency induction The medium is brought into direct or indirect contact with or in proximity to the welded portion of the plastic forming material, and the welded portion is heated in the same manner as described above, and the heat is used to melt the welded portion of the plastic forming material. A method of joining is known.

【０００４】ところが、該被溶着部に渦巻き状のコイル
または多重巻きのコイルを近づけるような場合には、該
被溶着部を通過する磁力線の密度がコイルから離れるに
従って著しく減少するので、特に、３次元の面を溶着し
ようとする場合には、コイル側とコイルと反対側の加熱
バランスが崩れ、均一な溶着ができないだけでなく、溶
着時間も長くかかった。また、該被溶着部を多重巻きの
コイルの内側に挿入する場合には、被溶着部および加熱
媒体だけでなく、該形成物の被溶着部周辺、さらには、
被溶着部または加熱媒体の固定具までを該コイルの内側
に入れなければならない場合が多く、形成物を変形させ
て該コイルの内側に挿入するか、該コイルを該形成物が
入る大きさにしなければならず、その結果、均質な溶着
物が得られなかったり、該加熱媒体の加熱効率が著しく
悪くなって溶着時間が長くなったりする場合が多かっ
た。さらに、コイルの内側に被溶着部を出し入れしなけ
ればならないので、被溶着物のセットおよび取り出しの
自動化が困難なものであった。However, when a spiral coil or a multi-turn coil is brought close to the welded portion, the density of the magnetic field lines passing through the welded portion is remarkably reduced as the distance from the coil increases. When attempting to weld a dimensional surface, the heating balance between the coil side and the side opposite to the coil was lost, not only uniform welding was not possible, but also the welding time was long. When the welded part is inserted inside the coil of multiple windings, not only the welded part and the heating medium but also the periphery of the welded part of the formation, and further,
In many cases, even the welded part or the fixture for the heating medium has to be put inside the coil, and the formation is deformed and inserted into the coil, or the coil is sized to fit the formation. In many cases, a homogeneous weld deposit cannot be obtained, or the heating efficiency of the heating medium is significantly deteriorated, resulting in a long welding time. Further, since the welded portion has to be taken in and out from the inside of the coil, it is difficult to set and take out the welded object automatically.

【０００５】[0005]

【発明が解決しようとする課題】すなわち、従来の高周
波誘導を利用した溶着方法については、該被溶着部に渦
巻状のコイルまたは多重巻きのコイルを近づけるか、該
被溶着部を多重巻きのコイルの内側に挿入するかして該
加熱媒体を加熱するので、該被溶着部を１回の操作で均
一に溶着ができなかったり、溶着時間が長くかかった
り、品質の良い溶着が安定して得られなかったりする場
合が多く、さらに、被溶着物のセットまたは取り出しが
複雑で生産性が悪く、ひいては、自動化が困難であった
りという欠点があり、該被溶着部を１回の操作で、短時
間に、品質の良い溶着物が安定して得ることができ、し
かも、溶着工程の自動化が容易であるような生産性の良
い溶着方法の開発が期待されている。That is, in the conventional welding method using high frequency induction, a spiral coil or a multiple winding coil is brought close to the welded portion, or the welded portion is a multiple winding coil. Since the heating medium is heated by inserting it inside, the part to be welded cannot be uniformly welded in one operation, the welding time is long, and good quality welding can be stably obtained. In many cases, it is difficult to set or take out the welded matter and productivity is low, and automation is difficult. It is expected to develop a welding method with good productivity that enables stable production of a welded product of high quality over time and facilitates automation of the welding process.

【０００６】[0006]

【課題を解決するための手段】本発明者らは、従来の高
周波誘導を利用した溶着方法、すなわち、高周波誘導で
発熱する加熱媒体により被溶着部を溶融して接合するプ
ラスチック形成物の溶着、特に、高周波誘導コイルによ
る被溶着部の加熱方法の持つ前記問題点を鑑み、鋭意検
討した結果、少なくとも一方のコイルを移動して、２つ
のコイルを、被溶着部が該２つのコイルの間または堺目
近傍に位置するように重ね合わせ、該２つのコイルに高
周波電流を流して該被溶着部を加熱し、溶着することを
特徴とするプラスチック形成物の溶着方法であれば、前
記問題点を解決できることを見出だし本発明に至った。
また、該２つのコイルに交互に高周波電流を流して該被
溶着部を加熱し、溶着することによっても得られるが、
該２つのコイルを、該２つのコイルに高周波電流を流し
た時に磁力線の向きが同じ向きになるように重ね合わ
せ、該２つのコイルに同時に高周波電流を流して該被溶
着部を加熱し、溶着すれば、さらなる効果が得られるこ
とを見い出し本発明のに至った。DISCLOSURE OF THE INVENTION The inventors of the present invention have heretofore known a welding method using high frequency induction, that is, welding of a plastic formed product in which a welded portion is melted and joined by a heating medium which generates heat by high frequency induction, In particular, as a result of diligent studies in view of the above problems of the method for heating the welded portion by the high-frequency induction coil, as a result of attentive examination, at least one coil is moved to move two coils so that the welded portion is between the two coils or The above-mentioned problems are solved in the method of welding a plastic-formed product, characterized in that they are superposed so as to be positioned in the vicinity of the Sakai, high-frequency current is passed through the two coils to heat the welded portion, and the welding is performed. The inventors have found that it can be solved and have reached the present invention.
Alternatively, a high-frequency current may be alternately applied to the two coils to heat the welded portion and weld the welded portion.
The two coils are superposed so that the directions of the magnetic force lines are the same when a high-frequency current is applied to the two coils, and a high-frequency current is applied to the two coils at the same time to heat the welded part to perform welding. Then, it was found that further effects can be obtained, and the present invention was achieved.

【０００７】[0007]

【作用】高周波誘導で発熱する加熱媒体により被溶着部
を溶融して接合するプラスチック形成物の溶着におい
て、溶着物の品質が良く、しかも、生産性の良い溶着方
法は、該加熱媒体を均一にしかもプラスチックを溶着す
るのに十分な熱量が短時間で放出されるように発熱させ
ること、また、被溶着物のセットおよび取り出しが容易
にできることが必要である。そのためには、前者につい
ては、高周波電流をコイルに流した時の該発熱媒体が置
かれている空間の磁束の変化量が大きく且つ均一である
ことが必要であり、後者については、被溶着物のセット
および取り出し時に、被溶着物の周囲が広く空くことが
必要である。In the welding of the plastic forming material in which the parts to be welded are melted and joined by the heating medium that generates heat by high frequency induction, the welding method is of high quality and high productivity. In addition, it is necessary to generate heat so that a sufficient amount of heat for welding the plastic is released in a short time, and to easily set and take out the material to be welded. For that purpose, for the former, it is necessary that the amount of change in the magnetic flux in the space in which the heat generating medium is placed when a high-frequency current is applied to the coil is large and uniform, and for the latter, the material to be welded is It is necessary to have a wide space around the material to be welded when setting and removing the.

【０００８】本発明では、上記の２つの必要条件を満た
すために、少なくとも一方のコイルを移動させて、２つ
のコイルを被溶着部が該２つのコイルの間または堺目近
傍に位置するように重ね合わせ、すなわち、２つのコイ
ルで該被溶着部を挟むようにして、該２つのコイルに高
周波電流を流すことにより、上記の２つの必要条件を満
たして、溶着物の品質が良く、しかも、生産性の良い溶
着方法を得ようとするものである。すなわち、磁束の変
化量が比較的均一な空間は、多重巻きのコイルの内側で
は得易いものの、コイルの外側では得にくい。その理由
はコイルから離れるに従って著しく磁束の変化量が小さ
くなるからであるが、上記のように、２つのコイルを重
ね合わせることによって磁束の変化量の位置によるバラ
ツキを相互に補完させれば、磁束の変化量が比較的均一
な空間を得ることができ、ひいては、該加熱媒体を均一
にしかもプラスチックを溶着するのに十分な熱量が短時
間で放出されるように発熱させることができる。In the present invention, in order to satisfy the above two requirements, at least one of the coils is moved so that the welded portions of the two coils are located between the two coils or in the vicinity of the slit. By superposing, that is, by sandwiching the welded portion between two coils and passing a high-frequency current through the two coils, the above two necessary conditions are satisfied, the quality of the welded material is good, and the productivity is high. To obtain a good welding method. That is, a space in which the amount of change in magnetic flux is relatively uniform is easy to obtain inside the multi-turn coil, but difficult to obtain outside the coil. The reason is that the amount of change in the magnetic flux becomes significantly smaller as the distance from the coil increases, but if the two coils are overlapped to compensate for the variation in the position of the amount of change in the magnetic flux as described above, It is possible to obtain a space in which the amount of change is relatively uniform, and it is possible to heat the heating medium so that a sufficient amount of heat for welding the plastic is released in a short time.

【０００９】また、該被溶着物は該２つのコイルの間に
あるので、すなわち、２つのコイルは被溶着物を覆うよ
うに位置しているので、何れのコイルも被溶着物側と反
対方向には容易に移動できる。そこで、被溶着物のセッ
トおよび取り出し時に、該２つのコイルを移動して被溶
着物の周囲を広く空ければ、被溶着物のセットおよび取
り出しが容易にできるで生産性が向上し、溶着工程の自
動化も可能となる。なお、被溶着部は、必ずしも、同時
に、均一に加熱しなくても構わない。例えば、該２つの
コイルに交互に高周波電流を流して該被溶着部全体を加
熱しても構わない。すなわち、まず一方のコイルに高周
波電流を流して被溶着部の同コイル側を溶融し、次にも
う一方のコイルに高周波電流を流して残りの部分を溶融
しても本発明の目的の溶着は達成される。すなわち、加
熱媒体の各部が受ける磁束の変化量は、時間的なずれが
あってもトータル量が均一であれば、本発明の目的の溶
着は達成される。Further, since the object to be welded is located between the two coils, that is, the two coils are positioned so as to cover the object to be welded, both coils are in the opposite direction to the object to be welded. Easy to move to. Therefore, when setting and taking out the object to be welded, if the two coils are moved to leave a wide space around the object to be welded, the object to be welded can be easily set and taken out, and the productivity is improved. It is possible to automate. It should be noted that the welded portions do not necessarily have to be heated uniformly at the same time. For example, a high frequency current may be alternately applied to the two coils to heat the entire welded portion. That is, even if a high-frequency current is first applied to one coil to melt the same coil side of the welded portion, and then a high-frequency current is applied to the other coil to melt the remaining portion, the welding for the purpose of the present invention will not occur. To be achieved. That is, if the amount of change in the magnetic flux received by each part of the heating medium is uniform even if there is a time lag, welding for the purpose of the present invention is achieved.

【００１０】しかしながら、２つのコイルを、該２つの
コイルに高周波電流を流した時に磁力線の向きが同じ向
きになるように重ね合わせ、該２つのコイルに同時に高
周波電流を流して該被溶着部を加熱し、溶着するように
すれば、さらに、溶着時間を短縮することができ、溶着
物の品質も安定させることができる。なお、上記ではコ
イルの移動についてのみ記載したが、実際には、該被溶
着部の周辺には、コイルだけでなく、加熱媒体、加熱媒
体の支持体、または、被溶着部押さえ治具、例えば、溶
着後被溶着部内に加熱媒体を残すような場合に被溶着部
の形状等を維持したり密着性を増大させるために使用す
る押さえ治具等があり、これらも上記のコイルの移動に
合わせて被溶着物から引き離した方が生産性を向上する
上で好ましい場合が多い。また、該加熱媒体が、高周波
誘導により発熱しないか、または、発熱しにくい支持体
に支持された金属製の板体または金属製の板体を曲げ加
工したものであって、該加熱媒体を該支持体と共に該被
溶着部に押し付けて該被溶着部を直接または間接的に加
熱し、溶着後、該加熱媒体を該被溶着部から引離して溶
着を完成するような溶着方法に本発明の方法を付加すれ
ば、該加熱媒体および該加熱媒体の支持体をコイルの移
動に合わせて該被溶着物から引き離せば良いので、さら
に、本発明の効果が期待できる溶着方法が完成する。However, the two coils are superposed so that the directions of the magnetic force lines are the same when a high-frequency current is applied to the two coils, and a high-frequency current is applied to the two coils at the same time so that the welded portion is removed. By heating and welding, the welding time can be further shortened and the quality of the welded material can be stabilized. Although only the movement of the coil has been described above, in practice, not only the coil but also the heating medium, the support of the heating medium, or the welding part pressing jig, for example, around the welding part is used. , There is a holding jig etc. used to maintain the shape of the welded part and increase the adhesion when leaving the heating medium in the welded part after welding, and these also match the movement of the above coil. In many cases, it is preferable to separate it from the adherend to improve productivity. In addition, the heating medium does not generate heat due to high frequency induction, or is a metal plate supported by a support that does not easily generate heat, or a metal plate that is bent, and the heating medium is The present invention is applied to a welding method in which a welded portion is pressed together with a support to directly or indirectly heat the welded portion, and after the welding, the heating medium is separated from the welded portion to complete welding. If a method is added, the heating medium and the support for the heating medium may be separated from the object to be welded in accordance with the movement of the coil, and thus the welding method in which the effect of the present invention can be expected is completed.

【００１１】なお、この溶着方法の場合は、通常、該加
熱媒体として、厚さが０．０１ｍｍないし１．０ｍｍの
金属製、例えば、アルミニウムおよびその合金、銅およ
びその合金、鉄、ニッケル、クロム、および、それらの
合金、例えば、ステンレス、ニクロム等の板体またはこ
れを加工したものが使用されるが、アルミニウムまたは
アルミ合金で形成された、厚さが０．０２ｍｍないし
０．５ｍｍの板体またはこれを加工したものを使用する
方が、発熱のバラツキが小さく、冷却効率も良く、安定
した品質の溶着物が得られるので好ましい。また、該プ
ラスチック形成物が２枚の押出シートまたはインフレー
ションフィルムと管状形成物であって、該２枚の押出シ
ートの間にまたはインフレーションフィルムの内側に該
管状形成物の一部を挿入し、２枚の押出シートまたはイ
ンフレーションフィルムと挿入された該管状形成物の重
なりあった部分を溶着して充填、注入、排出、または、
移送するための管状の開口部を有する袋状の容器を製造
するための手段として本発明を利用すれば、特に、該プ
ラスチック形成物が低密度ポリエチレン樹脂、直鎖状低
密度ポリエチレン樹脂、高密度ポリエチレン樹脂、ポリ
プロピレン樹脂等のポリオレフィン系の樹脂で形成され
ている場合には、特に、本発明の効果が発揮される。In the case of this welding method, the heating medium is usually made of metal having a thickness of 0.01 mm to 1.0 mm, such as aluminum and its alloys, copper and its alloys, iron, nickel and chromium. , And alloys thereof, for example, plates such as stainless steel and nichrome, or processed products thereof are used. Plates formed of aluminum or aluminum alloy and having a thickness of 0.02 mm to 0.5 mm Alternatively, it is preferable to use a product obtained by processing this because variations in heat generation are small, cooling efficiency is good, and a welded material of stable quality can be obtained. In addition, the plastic molded product is two extruded sheets or an inflation film and a tubular molded product, and a part of the tubular molded product is inserted between the two extruded sheets or inside the blown film. Filling, pouring, discharging, or welding by welding the overlapped portion of the tubular formation inserted with a single extruded sheet or blown film
When the present invention is used as a means for producing a bag-shaped container having a tubular opening for transferring, particularly when the plastic molding is a low density polyethylene resin, a linear low density polyethylene resin, a high density The effect of the present invention is particularly exerted when it is formed of a polyolefin resin such as polyethylene resin or polypropylene resin.

【００１２】なお、ここでいう管状とは、注入、排出、
または、移送するために形成物の内側に流路が形成され
ていることを意味するものであり、必ずしも外観が単純
な筒状である必要はない。また、当初流路が形成されて
いなくても、使用時に流路を形成する場合も、ここで言
う管状とした。The term "tubular" as used herein means injection, discharge,
Alternatively, it means that a flow path is formed inside the formed object for transferring, and the appearance does not necessarily have to be a simple tubular shape. Further, even when the flow path is not initially formed, the tubular shape is used when the flow path is formed at the time of use.

【００１３】[0013]

【実施例】以下に、本発明を実施例をもとに図面を参照
しながら具体的に説明する。 実施例１ 本実施例は、輸液容器等に用いられる管状の開口部（一
般にポートと呼ばれる。）を有する袋状容器を製造する
ための一貫として、本発明の溶着方法が使用される例で
ある。本実施例で製造される容器は、図３に示すよう
に、周縁がシールされた２枚のシート３１からなる袋状
容器本体３と、該袋状容器本体３のシールされた周縁、
すなわち、周縁シール部３２の一部に明けられた懸垂口
３３と、該袋状容器本体３の該懸垂口３３のある側と反
対側に本発明の溶着方法で溶着された管状の開口部、す
なわち、ポート４とからなるポート付きの袋状容器２で
ある。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below based on embodiments with reference to the drawings. Example 1 This example is an example in which the welding method of the present invention is used as a part of manufacturing a bag-shaped container having a tubular opening (generally called a port) used for an infusion container or the like. . As shown in FIG. 3, the container manufactured in the present embodiment includes a bag-shaped container body 3 composed of two sheets 31 with sealed peripheral edges, and a sealed peripheral edge of the bag-shaped container body 3.
That is, the suspension opening 33 opened in a part of the peripheral edge seal portion 32, and the tubular opening welded by the welding method of the present invention to the side of the bag-shaped container body 3 opposite to the side where the suspension opening 33 is present, That is, it is the bag-shaped container 2 with the port, which is composed of the port 4.

【００１４】また、本実施例に使用される２枚のシート
３１は、直鎖状低密度ポリエチレン樹脂製の厚さ０．２
５ｍｍのインフレーション成形されたシートであり、ポ
ート用成形物４は、高密度ポリエチレン樹脂製内径８ｍ
ｍ、外径１１ｍｍ、長さ３５ｍｍの筒状形成物である。
すなわち、本実施例では、該２枚のシート３１の該ポー
ト用成形物４との溶着部およびその周辺を除く周縁が、
一般に知れられる方法、例えば、ヒートシール法でシー
ルされ、該ポート用成形物４との溶着部５と反対側の周
縁シール部３２の一部がポンチ等で打ち抜かれ懸垂口３
３が形成された袋状容器本体３の周縁シールがなされて
いない部分で、すなわち、該ポート用成形物４との溶着
部およびその周辺で、該２枚のシート３１を開いて、そ
の内側にポート用成形物４の一部を差し込み、該２枚の
シート３１と該ポート用成形物４が重なりあった部分お
よびその周辺を被溶着部５として本発明の溶着方法によ
り溶着して管状の開口部を有する袋状の容器、すなわ
ち、ポート付きの袋状容器２を製造するものである。な
お、該被溶着部５に、周縁シールがなされていない部分
の近傍の周縁シール部３２の一部を加えることにより、
すなわち、２重シール部５１を設けることにより漏れの
ないポート付きの袋状容器２が得られる。The two sheets 31 used in this embodiment are made of linear low density polyethylene resin and have a thickness of 0.2.
It is a 5 mm inflation-molded sheet, and the port molding 4 is made of high-density polyethylene resin and has an inner diameter of 8 m.
m, outer diameter 11 mm, length 35 mm.
That is, in the present embodiment, the peripheral portions except for the welded portion of the two sheets 31 with the molded article 4 for port and the periphery thereof are
It is sealed by a generally known method, for example, a heat sealing method, and a part of the peripheral edge seal portion 32 on the opposite side of the welded portion 5 with the molded product 4 for a port is punched out by a punch or the like and the suspension port 3 is formed.
The two sheets 31 are opened at the portion where the peripheral edge of the bag-shaped container body 3 in which 3 is formed is not sealed, that is, at the welded portion with the molded article 4 for port and its periphery, and the inside thereof is opened. A part of the port molded product 4 is inserted, and the overlapped portion of the two sheets 31 and the port molded product 4 and the periphery thereof are welded as a welded portion 5 by the welding method of the present invention to form a tubular opening. A bag-shaped container having a portion, that is, a bag-shaped container 2 with a port is manufactured. In addition, by adding a part of the peripheral edge seal portion 32 in the vicinity of the portion where the peripheral edge seal is not formed to the welded portion 5,
That is, by providing the double seal portion 51, the bag-shaped container 2 with a port that does not leak can be obtained.

【００１５】ここで、袋状容器本体３をヒートシール方
法を使用して製造する方法を具体的に説明する。袋状容
器本体３の該ポート用形成物との溶着部およびその周辺
を除く周縁形状に合わせて加工した容器本体シール金型
を加熱し、本体シール用の耐熱シートを介して重ね合わ
せた該２枚のシート３１に押し付け、該２枚のシート３
１を十分に加熱した後に、該容器本体シール金型を離
し、代わりに冷却板を押し付けて冷却し、袋状容器本体
３をシールし、しかる後に、該ポート用形成物との溶着
部と反対側の周縁シール部３２の一部をポンチ等で打ち
抜いて懸垂口３３を形成し該袋状容器本体３が完成す
る。なお、必要に応じて、これをトリミングして該袋状
容器本体３の外形を整えても良い。Here, a method for manufacturing the bag-shaped container body 3 using the heat sealing method will be specifically described. The container main body sealing metal mold processed according to the peripheral shape excluding the welded portion of the bag-shaped container main body 3 with the port forming material and its periphery is heated, and the two are superposed through a heat-resistant sheet for main body sealing. The two sheets 3 are pressed against the three sheets 31.
1 is sufficiently heated, and then the container body sealing mold is released, and instead, a cooling plate is pressed to cool the bag-shaped container body 3 to seal the bag body, and then the welded portion with the port forming object is opposed. A part of the peripheral seal portion 32 on the side is punched out by a punch or the like to form a suspension port 33, and the bag-shaped container body 3 is completed. If necessary, the outer shape of the bag-shaped container body 3 may be trimmed by trimming it.

【００１６】次に、該２枚のシート３１と該ポート用形
成物が重なりあった部分およびその周辺を本発明の溶着
方法により溶着してポート付きの袋状の容器を製造する
方法を具体的に説明する。図１は、本実施例の被溶着物
のセットおよび取り出し時の被溶着部５、コイル１、お
よび、加熱媒体６等の位置関係を示す部分断面図であ
る。図１に示すように、該被溶着部５の形態に合わせて
加工された一対の支持体７の該被溶着部５の形態に合わ
せて加工された面に沿って取り付けられた高周波誘導に
より発熱する肉厚の薄い板状の一対の加熱媒体６が、該
支持体７と共に、相当の距離をもってベース８と押し付
けプレート９に対面して固定され、それぞれの加熱媒体
６および支持体７の周囲を囲むように、円筒状に多重に
巻かれた高周波誘導用の２つのコイル１が設置された溶
着機構の、該相当の距離をもって対面する該１対の加熱
媒体６の間に、袋状容器本体３の周縁シールがなされて
いない部分の２枚のシート３１の間に差し込まれたポー
ト用成形物４の一部と該２枚のシート３１が重なりあっ
た部分およびその周辺を被溶着部５とする被溶着物が、
被溶着物固定治具１０によりセットされる。この時、該
被溶着物がセットし易いように、該溶着機構を被溶着物
のセット部から相当の距離離すことができるので、該被
溶着物を容易にセットし、また、取り出すことも容易に
できるものである。Next, a specific method of manufacturing a bag-shaped container with a port by welding the overlapping portion of the two sheets 31 and the port forming material and the periphery thereof by the welding method of the present invention. Explained. FIG. 1 is a partial cross-sectional view showing the positional relationship among the welded part 5, the coil 1, the heating medium 6 and the like when setting and taking out the welded object of the present embodiment. As shown in FIG. 1, heat is generated by high frequency induction attached along the surfaces of the pair of supports 7 processed according to the form of the welded portion 5 and processed according to the form of the welded portion 5. A pair of thin plate-shaped heating mediums 6 are fixed together with the supporting body 7 facing the base 8 and the pressing plate 9 with a considerable distance, and the heating medium 6 and the supporting body 7 are surrounded. A bag-shaped container body is provided between the pair of heating mediums 6 facing each other at a considerable distance in a welding mechanism in which two coils 1 for high-frequency induction, which are wound in multiple layers in a cylindrical shape so as to surround, are installed. 3, a part of the molded article 4 for a port inserted between two sheets 31 of the portion where peripheral edge sealing is not performed, a portion where the two sheets 31 overlap each other and a periphery thereof are welded portions 5. To be welded
It is set by the welding object fixing jig 10. At this time, since the welding mechanism can be separated from the set portion of the welding object by a considerable distance so that the welding object can be easily set, the welding object can be easily set and taken out easily. It can be done.

【００１７】図２は、溶着時、すなわち、該２枚のシー
ト３１と該ポート用成形物４が重なりあった部分および
その周辺を高周波加熱し、冷却する間の被溶着部５、コ
イル１、および、加熱媒体６等の位置関係を示す部分断
面図である。被溶着物をセット後、該ベース８を上昇さ
せると共に、該押し付けプレート９を押し付けシャフト
９１により下降させて、図２に示すように、該被溶着部
５に該一対の加熱媒体６を両側から挟むように押し付け
ながら、該２つのコイル１に同時に一定時間高周波電流
を流して該加熱媒体６を発熱させて該被溶着部５を加熱
して溶融し、しかる後に冷却する。FIG. 2 shows the portions to be welded 5, the coil 1, during welding, that is, during high-frequency heating and cooling of the overlapping portion of the two sheets 31 and the port molding 4 and the periphery thereof. FIG. 3 is a partial cross-sectional view showing the positional relationship between the heating medium 6 and the like. After setting the object to be welded, the base 8 is raised and the pressing plate 9 is lowered by the pressing shaft 91, so that the pair of heating mediums 6 are attached to the object to be welded 5 from both sides as shown in FIG. While pressing them so as to sandwich them, a high-frequency current is simultaneously applied to the two coils 1 for a certain period of time to heat the heating medium 6 to heat and melt the welded portion 5, and then to cool it.

【００１８】この時、該２つのコイル１は、該被溶着部
５をセットまたは搬送することを考慮することなく被溶
着部５に近づけることができるので、例えば、本実施例
のように、被溶着物の被溶着部５以外の部分が該２つの
コイル１の接近をほとんど妨げないシートであるような
場合には、該２つのコイル１は、あたかも同じ巻き数の
１つのコイルであるかのような位置まで近づけることが
できるので、該２つのコイル１に高周波電流を流した時
の磁力線の向きが同じになるように設定しておくことに
より、該被溶着部５は、該２つのコイル１と同じ巻き数
の１つのコイルの内側にある場合に匹敵するレベルで該
被溶着部５を加熱することができ、品質が良く安定した
溶着物が短時間で得られる。なお、溶着完了後に、該加
熱媒体６を該支持体７と共に該被溶着部５から引き離し
て図１の位置に戻せば、溶着物を容易に取り出すことが
できることは、先に述べた通りである。At this time, since the two coils 1 can be brought close to the welded portion 5 without considering setting or transporting the welded portion 5, for example, as in this embodiment, When the portion of the welded material other than the welded portion 5 is a sheet that hardly prevents the two coils 1 from approaching each other, the two coils 1 are as if they were one coil having the same number of turns. Such a position can be brought close to such a position. Therefore, by setting the directions of the magnetic lines of force when the high-frequency current is applied to the two coils 1 to be the same, the welded part 5 is The welded portion 5 can be heated at a level comparable to the case of being inside one coil having the same number of turns as 1, and a welded material of good quality and stable can be obtained in a short time. As described above, the welded material can be easily taken out by separating the heating medium 6 together with the support 7 from the welded portion 5 and returning the position to the position shown in FIG. 1 after the welding is completed. .

【００１９】本実施例では、加熱媒体６として、肉厚が
０．１ｍｍ、幅１０ｍｍ、長さ３２ｍｍのアルミニウム
合金の板体を、被溶着部５の形状に合わせて曲げ加工し
たものを使用したが、該加熱媒体６は、高周波誘導によ
り該被溶着部５を溶着するに足るエネルギーを発生する
だけでなく、効率良く該被溶着部５を加熱することがで
き、さらに、該加熱媒体６自身が効率良く冷却されるよ
うな材料であって、容易に破損しないような材料であれ
ば良い。すなわち、以下の条件を満足するような材料で
あれば良い。 １．高周波誘導で容易に発熱する発熱体である。 ２．シール面に沿った形状を有する。 ３．熱容量が小さい。 ４．耐久性を有する。 これらを満足するような材料としては、厚さの薄い金属
材料からなる板体を被溶着部５の面の形状に沿って形成
した肉厚の薄い板状の加熱媒体である。なお、該板状の
加熱媒体は、平らな板体を曲げて３次元構造に加工した
ものでも、切削加工により加工したものでも良い。In this embodiment, as the heating medium 6, a plate body made of an aluminum alloy having a wall thickness of 0.1 mm, a width of 10 mm and a length of 32 mm is bent according to the shape of the welded portion 5. However, the heating medium 6 not only generates sufficient energy to weld the welded portion 5 by high frequency induction, but also can efficiently heat the welded portion 5, and the heating medium 6 itself. Any material that can be efficiently cooled and that is not easily damaged may be used. That is, any material may be used as long as it satisfies the following conditions. 1. It is a heating element that easily generates heat by high frequency induction. 2. It has a shape along the sealing surface. 3. The heat capacity is small. 4. Has durability. A material satisfying these requirements is a thin plate-shaped heating medium in which a plate body made of a thin metal material is formed along the shape of the surface of the welded portion 5. The plate-shaped heating medium may be a flat plate that is bent to be processed into a three-dimensional structure or a cutting process.

【００２０】また、本実施例では、該加熱媒体６を該被
溶着部５から引き離す時の該加熱媒体６と該被溶着部５
間の剥離性を向上させるために、該加熱媒体６を覆うよ
うに耐熱シート６１、ここでは、ガラスクロス入のテフ
ロンシートを取り付けて間接的に加熱しているが必ずし
も本発明に必要なものではない。また、本実施例では、
高周波誘導加熱装置として、日本高周波株式会社製のＹ
ＫＮ−５型（発振周波数４００±５０ＫＨｚ、出力５Ｋ
Ｗ）を使用したが、金属製の加熱媒体を加熱できれば良
いので、同機に限ることなく、一般的な高周波誘導加熱
装置が使用できる。Further, in this embodiment, the heating medium 6 and the welded portion 5 when the heating medium 6 is separated from the welded portion 5 are used.
In order to improve the peeling property between them, a heat-resistant sheet 61, here, a Teflon sheet containing glass cloth is attached to cover the heating medium 6 and indirectly heated, but it is not always necessary for the present invention. Absent. Further, in this embodiment,
As a high frequency induction heating device, Y manufactured by Japan High Frequency Co., Ltd.
KN-5 type (oscillation frequency 400 ± 50KHz, output 5K
Although W) is used, it is only necessary that the heating medium made of metal can be heated, and therefore, not limited to the same machine, a general high-frequency induction heating device can be used.

【００２１】また、本実施例で使用したコイルは、直径
６ｍｍ、内径４ｍｍの銅管をガラスクロスで覆って絶縁
し、内径１００ｍｍ、巻き数４で巻いた多重巻のコイル
を使用したが、コイルの巻径、巻き数等については、加
熱媒体の形状、材質、厚さ等の違い、高周波誘導加熱装
置の周波数、出力、シール時間、被シール物の材質等を
考慮して、適当な巻径および巻き数を選べば良い。な
お、一般に、コイルは、コイル自体の発熱を抑えるため
に、電気伝導性の良い中空のパイプにより形成され、中
に水を流して冷却しながら使用される。ここで言う多重
巻のコイルとは、図４および図５に示すように、巻かれ
た管体または線体１１が筒状体を形成するように多重に
積み重なったコイルを言うものとした。また、渦巻き状
のコイルとは、巻かれた管体または線体が蚊取り線香の
ように渦巻き状を呈するコイルを言うものとした。The coil used in this embodiment was a multi-winding coil in which a copper tube having a diameter of 6 mm and an inner diameter of 4 mm was covered with glass cloth to be insulated, and the inner diameter was 100 mm and the number of turns was four. Regarding the winding diameter, number of windings, etc., consider the difference in the shape, material, thickness, etc. of the heating medium, the frequency of the high frequency induction heating device, the output, the sealing time, the material to be sealed, etc. And choose the number of turns. In general, the coil is formed of a hollow pipe having good electric conductivity in order to suppress heat generation of the coil itself, and is used while being cooled by pouring water into the coil. The multi-turn coil referred to here is a coil in which the wound tube bodies or wire bodies 11 are multiply stacked so as to form a tubular body, as shown in FIGS. 4 and 5. In addition, the spiral coil means a coil in which a rolled tube or wire has a spiral shape like a mosquito coil.

【００２２】なお、本実施例では、袋状容器本体３を先
に製造し、その後、該袋状容器本体３にポート用成形物
４を溶着してポート付きの袋状容器２を製造したが、逆
に、該ポート用成形物４を２枚のシート３１に溶着して
から、該２枚のシートを相互に溶着して袋状容器本体３
を製造することもできる。In this embodiment, the bag-shaped container body 3 is manufactured first, and then the port molding 4 is welded to the bag-shaped container body 3 to manufacture the bag-shaped container 2 with ports. Conversely, after the port molding 4 is welded to the two sheets 31, the two sheets are welded to each other to form the bag-shaped container body 3
Can also be manufactured.

【００２３】実施例２ 実施例１では、該２つのコイル１に高周波電流を流した
時の磁力線の向きが同じになるように設定し、該２つの
コイル１に同時に一定時間高周波電流を流して該加熱媒
体６を発熱させて該被溶着部５を加熱して溶融したが、
該２つのコイル１に交互に一定の高周波電流を流すだけ
でも、溶着時間は若干長くなるものの、実施例１と同様
に、該被溶着物を容易にセットし、また、取り出すこと
ができ、しかも、品質が良く安定した溶着物が短時間で
得られる。Embodiment 2 In Embodiment 1, the directions of magnetic lines of force when the high-frequency currents are applied to the two coils 1 are set to be the same, and the high-frequency currents are applied to the two coils 1 at the same time for a fixed time. The heating medium 6 was heated to heat the melted portion 5 to melt it,
Even if a constant high-frequency current is passed through the two coils 1 alternately, the welding time is slightly lengthened, but the object to be welded can be easily set and taken out as in Example 1, and Therefore, a stable and high quality weld deposit can be obtained in a short time.

【００２４】実施例３ 該ポート成形物として、直鎖状低密度ポリエチレン樹脂
製内径１８ｍｍ、外径２２ｍｍ、長さ４０ｍｍ、の管状
形成物を用いるとともに、加熱媒体６として、肉厚が
０．１ｍｍ、幅１５ｍｍ、長さ６４ｍｍののアルミニウ
ム合金の板体を、被溶着部５の形状に合わせて曲げ加工
したものを使用し、さらに、支持体７も被溶着部５の形
状に加工したものを使用し、それ以外を、実施例と同じ
方法で溶着しても、実施例１と同様に、該被溶着物を容
易にセットでき、また、容易に取り出すこともでき、し
かも、品質が良く安定した溶着物が短時間で得られる。Example 3 As the port molding, a tubular low-density polyethylene resin tubular product having an inner diameter of 18 mm, an outer diameter of 22 mm and a length of 40 mm was used, and the heating medium 6 had a wall thickness of 0.1 mm. , A plate made of an aluminum alloy having a width of 15 mm and a length of 64 mm, which is bent according to the shape of the welded portion 5, and further, the support 7 processed into the shape of the welded portion 5 is used. Even if it is used and the others are welded by the same method as in the embodiment, the adherend can be easily set and easily taken out as in the case of the embodiment 1, and the quality is stable. The deposited material can be obtained in a short time.

【００２５】実施例４ 該ポート成形物として、直鎖状低密度ポリエチレン樹脂
製内径１０ｍｍ、外径１５ｍｍ、長さ３２ｍｍ、の管状
形成物を用いるとともに、加熱媒体６として、肉厚が
０．１ｍｍ、幅７ｍｍ、長さ４４ｍｍののアルミニウム
合金の板体を、被溶着部５の形状に合わせて曲げ加工し
たものを使用し、さらに、支持体７も被溶着部５の形状
に加工したものを使用し、それ以外を、実施例と同じ方
法で溶着しても、実施例１と同様に、該被溶着物を容易
にセットし、また、取り出すことができ、しかも、品質
が良く安定した溶着物が短時間で得られる。Example 4 As the port molding, a tubular low-density polyethylene resin tubular product having an inner diameter of 10 mm, an outer diameter of 15 mm and a length of 32 mm was used, and the heating medium 6 had a wall thickness of 0.1 mm. , A width of 7 mm and a length of 44 mm made of an aluminum alloy plate, which is bent according to the shape of the welded portion 5, and the support 7 is also processed into the shape of the welded portion 5. Even if it is used and the other parts are welded by the same method as in the embodiment, the material to be welded can be easily set and taken out in the same manner as in the embodiment 1, and the welding is stable with good quality. You can get things in a short time.

【００２６】[0026]

【発明の効果】本発明によれば、各種の熱可塑性樹脂に
より形成された形成物について、品質の良い溶着が、簡
単な機構の設備で、短時間に、安定して得られ、しか
も、生産性も良いので、製造ラインの自動化が容易にで
きる。本発明によれば、例えば、輸液容器、輸血容器等
の医療用の容器、すなわち、充填、注入、排出、また
は、移送するための管状の開口部を有する袋状の容器
を、人体に対してより安全性が高い樹脂、例えば、ポリ
オレフィン系の汎用樹脂であるポリエチレン系樹脂やポ
リプロピレン系樹脂等で、安定した品質の溶着物を、人
為的関与を極力減らした環境下で、すなわち、自動化さ
れた設備で、安価に得ることができる。EFFECTS OF THE INVENTION According to the present invention, high-quality welding can be stably performed in a short time by using equipment having a simple mechanism for products formed by various thermoplastic resins. Since it has good performance, it is easy to automate the production line. According to the present invention, for example, a medical container such as an infusion container or a blood transfusion container, that is, a bag-shaped container having a tubular opening for filling, injecting, discharging, or transferring, to a human body. A resin with higher safety, for example, a polyethylene-based resin or a polypropylene-based resin, which is a general-purpose polyolefin-based resin, is used to produce a welded material of stable quality in an environment in which human involvement is minimized, that is, automated. With equipment, it can be obtained at low cost.

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

【図１】実施例１の被溶着物のセットおよび取り出し時
の被溶着部５、コイル１、および、加熱媒体６等の位置
関係を示す部分断面図である。FIG. 1 is a partial cross-sectional view showing a positional relationship among a welded part 5, a coil 1, a heating medium 6 and the like when setting and taking out a welded object of Example 1.

【図２】実施例１の溶着時の被溶着部５、コイル１、お
よび、加熱媒体６等の位置関係を示す部分断面図であ
る。FIG. 2 is a partial cross-sectional view showing a positional relationship among a welded portion 5, a coil 1, a heating medium 6 and the like at the time of welding in Example 1.

【図３】実施例１で製造されるポート付き袋状容器の正
面図である。FIG. 3 is a front view of a bag-shaped container with a port manufactured in Example 1.

【図４】多重巻のコイルの平面図である。FIG. 4 is a plan view of a multi-turn coil.

【図５】多重巻のコイルの正面図である。FIG. 5 is a front view of a coil of multiple windings.

【符号の説明】[Explanation of symbols]

１ コイル ２ ポート付きの袋状容器 ３ 袋状容器本体 ４ ポート用成形物（ポート） ５ 被溶着部 ６ 加熱媒体 ７ 支持体 ８ ベース ９ 押し付けプレート １０ 被溶着物固定治具 １１ 巻かれた管体または線体 ３１ シート ３２ 周縁シール部 ３３ 懸垂口 ５１ ２重シール部 ６１ 耐熱シート ９１ 押し付けシャフト 1 Coil 2 Bag-shaped Container with Port 3 Bag-shaped Container Main Body 4 Port Molding (Port) 5 Welding Part 6 Heating Medium 7 Support 8 Base 9 Pressing Plate 10 Welding Fixing Fixture 11 Rolled Pipe Or wire 31 Sheet 32 Peripheral seal 33 Suspension port 51 Double seal 61 Heat resistant sheet 91 Pressing shaft

Claims (8)

【特許請求の範囲】[Claims] 【請求項１】 高周波誘導で発熱する加熱媒体により被
溶着部を溶融して接合するプラスチック形成物の溶着に
おいて、少なくとも一方のコイルを移動して、２つのコ
イルを、被溶着部が該２つのコイルの間または堺目近傍
に位置するように重ね合わせ、該２つのコイルに高周波
電流を流して該被溶着部を加熱し、溶着することを特徴
とするプラスチック形成物の溶着方法。1. In the welding of a plastic formed product in which a welded portion is melted and joined by a heating medium that generates heat by high frequency induction, at least one coil is moved to move two coils so that the welded portion has two A method for welding a plastic formed article, characterized in that the two are overlapped so as to be positioned between the coils or in the vicinity of the slits, and a high-frequency current is passed through the two coils to heat the welded portion to perform welding. 【請求項２】 該２つのコイルを、該２つのコイルに高
周波電流を流した時に磁力線の向きが同じ向きになるよ
うに重ね合わせ、該２つのコイルに同時に高周波電流を
流して該被溶着部を加熱し、溶着することを特徴とする
請求項１に記載のプラスチック形成物の溶着方法。2. The two coils are superposed so that the directions of magnetic force lines are the same when a high-frequency current is applied to the two coils, and a high-frequency current is applied to the two coils at the same time to weld the welded portion. The method for welding a plastic-formed product according to claim 1, wherein the resin is heated and welded. 【請求項３】 該２つのコイルに交互に高周波電流を流
して該被溶着部を加熱し、溶着することを特徴とする請
求項１に記載のプラスチック形成物の溶着方法。3. The method for welding a plastic formed article according to claim 1, wherein a high-frequency current is alternately applied to the two coils to heat the welded portion to perform the welding. 【請求項４】 加熱媒体、加熱媒体の支持体、または、
被溶着部押さえ治具を該２つのコイルの移動に合わせて
移動することを特徴とする請求項１ないし請求項３の何
れかに記載のプラスチック形成物の溶着方法。4. A heating medium, a support for the heating medium, or
The method for welding a plastic formed product according to any one of claims 1 to 3, wherein the welded part pressing jig is moved in accordance with the movement of the two coils. 【請求項５】 該加熱媒体が、高周波誘導により発熱し
ないか、または、発熱しにくい支持体に支持された金属
製の板体または金属製の板体を曲げ加工したものであっ
て、該加熱媒体を該支持体と共に該被溶着部に押し付け
て該被溶着部を直接または間接的に加熱し、溶着後、該
加熱媒体を該被溶着部から引離すことを特徴とする請求
項１ないし請求項４の何れかに記載のプラスチック形成
物の溶着方法。5. The heating medium is a metal plate or a metal plate supported by a support that does not generate heat due to high frequency induction or that does not generate heat easily, and the metal plate is bent. The medium is pressed together with the support to the welded portion to directly or indirectly heat the welded portion, and after the welding, the heating medium is separated from the welded portion. Item 5. A method for welding a plastic-formed product according to any one of Items 4. 【請求項６】 該プラスチック形成物が２枚の押出シー
トまたはインフレーションフィルムと管状形成物であっ
て、該２枚の押出シートの間にまたはインフレーション
フィルムの内側に該管状形成物の一部を挿入し、２枚の
押出シートまたはインフレーションフィルムと挿入され
た該管状形成物の重なりあった部分を溶着してポート付
き袋状容器を形成することを特徴とする請求項１ないし
請求項５の何れかに記載のプラスチック形成物の溶着方
法。6. The plastic molding is two extruded sheets or an inflation film and a tubular molding, and a part of the tubular molding is inserted between the two extruded sheets or inside the inflation film. 6. The bag-shaped container with a port is formed by welding two extruded sheets or an inflation film and overlapping portions of the tubular formed article which are inserted to each other to form a bag-shaped container with a port. The method for welding a plastic formed article according to item 1. 【請求項７】 溶着された形成物が医薬品を充填するた
めのまたは医療用の、管状の開口部を有する袋状のプラ
スチック容器であることを特徴とする請求項１ないし請
求項６の何れかに記載のプラスチック形成物の溶着方
法。7. The bag-shaped plastic container having a tubular opening for filling a medicinal product or for medical use, wherein the welded formed product is a plastic container. The method for welding a plastic formed article according to item 1. 【請求項８】 該形成物がポリオレフィン系樹脂で形成
されていることを特徴とする請求項１ないし請求項７の
何れかに記載のプラスチック形成物の溶着方法。8. The method for welding a plastic formed product according to claim 1, wherein the formed product is formed of a polyolefin resin.
JP5329788A 1993-12-01 1993-12-01 Method for fusion-bonding plastic molding Pending JPH07156272A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5329788A JPH07156272A (en) 1993-12-01 1993-12-01 Method for fusion-bonding plastic molding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5329788A JPH07156272A (en) 1993-12-01 1993-12-01 Method for fusion-bonding plastic molding

Publications (1)

Publication Number Publication Date
JPH07156272A true JPH07156272A (en) 1995-06-20

Family

ID=18225272

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5329788A Pending JPH07156272A (en) 1993-12-01 1993-12-01 Method for fusion-bonding plastic molding

Country Status (1)

Country Link
JP (1) JPH07156272A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006011475A1 (en) * 2004-07-26 2006-02-02 Jms.Co., Ltd Heater unit and thermal fusion apparatus for synthetic resin members and thermal fusion method for synthetic resin members
JP2013504449A (en) * 2009-09-11 2013-02-07 マム ベービーアーティケル ゲゼルシャフト ミット ベシュレンクテル ハフツング Method for at least partially joining the walls of an elastic hollow body and hollow body
US20220242054A1 (en) * 2019-07-29 2022-08-04 Bossar Holding B.V. Production of collapsible pouches having a fitment

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006011475A1 (en) * 2004-07-26 2006-02-02 Jms.Co., Ltd Heater unit and thermal fusion apparatus for synthetic resin members and thermal fusion method for synthetic resin members
JPWO2006011475A1 (en) * 2004-07-26 2008-05-01 株式会社ジェイ・エム・エス Synthetic resin member heating jig, heat fusion apparatus, and synthetic resin member heat fusion method
JP4661783B2 (en) * 2004-07-26 2011-03-30 株式会社ジェイ・エム・エス Synthetic resin member heating jig, heat fusion apparatus, and synthetic resin member heat fusion method
US7984739B2 (en) * 2004-07-26 2011-07-26 Jms Co., Ltd. Heater unit and thermal fusion apparatus for synthetic resin members and thermal fusion method for synthetic resin members
JP2013504449A (en) * 2009-09-11 2013-02-07 マム ベービーアーティケル ゲゼルシャフト ミット ベシュレンクテル ハフツング Method for at least partially joining the walls of an elastic hollow body and hollow body
US10875253B2 (en) 2009-09-11 2020-12-29 Mam Babyartikel Gesellschaft M.B.H. Method for the production of a pacifier teat
US20220242054A1 (en) * 2019-07-29 2022-08-04 Bossar Holding B.V. Production of collapsible pouches having a fitment

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