JP2008221684A - 複数の樹脂材料のレーザー溶着方法 - Google Patents

複数の樹脂材料のレーザー溶着方法 Download PDF

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JP2008221684A
JP2008221684A JP2007064612A JP2007064612A JP2008221684A JP 2008221684 A JP2008221684 A JP 2008221684A JP 2007064612 A JP2007064612 A JP 2007064612A JP 2007064612 A JP2007064612 A JP 2007064612A JP 2008221684 A JP2008221684 A JP 2008221684A
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resin material
light
absorbing resin
container
end surface
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Mikihiko Kato
三紀彦 加藤
Noritoshi Furuya
教俊 古谷
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    • 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
    • B29C65/16—Laser beams
    • B29C65/1629—Laser beams characterised by the way of heating the interface
    • B29C65/1635—Laser beams characterised by the way of heating the interface at least passing through one of the parts to be joined, i.e. laser 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1222—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a lapped joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1224—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least a butt joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/12—Joint cross-sections combining only two joint-segments; Tongue and groove joints; Tenon and mortise joints; Stepped joint cross-sections
    • B29C66/122—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section
    • B29C66/1226—Joint cross-sections combining only two joint-segments, i.e. one of the parts to be joined comprising only two joint-segments in the joint cross-section comprising at least one bevelled joint-segment
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—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
    • B29C66/54—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/542—Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles joining hollow covers or hollow bottoms to open ends of container bodies
    • 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
    • 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
    • B29C66/8122—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 composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81266—Optical properties, e.g. transparency, reflectivity
    • B29C66/81267—Transparent to electromagnetic radiation, e.g. to visible light
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C65/16—Laser beams
    • B29C65/1687—Laser beams making use of light guides
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/116—Single bevelled joints, i.e. one of the parts to be joined being bevelled in the joint area
    • B29C66/1162—Single bevel to bevel joints, e.g. mitre joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—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
    • B29C66/534—Joining single elements to open ends of tubular or hollow articles or to the ends of bars
    • B29C66/5346—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat
    • B29C66/53461—Joining single elements to open ends of tubular or hollow articles or to the ends of bars said single elements being substantially flat joining substantially flat covers and/or substantially flat bottoms to open ends of container bodies
    • 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
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    • B—PERFORMING OPERATIONS; TRANSPORTING
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  • Optics & Photonics (AREA)
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Abstract

【課題】複数の樹脂材料を直交状態に接触させた状態において、一方の樹脂材料の端面における一部のみを溶融させて結合を行う。
【解決手段】光吸収性の樹脂材料からなる容器１は、垂直壁１Ａの上端側部分を、上端面に溶融すべき所要範囲のフラット部分１ａを残して３８度の外側傾斜面１ｂとする。光透過性の樹脂材料からなるキャップ状の蓋２は、垂直壁２Ｂの内側に、容器１の外側傾斜面１ｂと平行する内側傾斜面２ｂを形成する。容器１に蓋２を被せた状態において、蓋２を介してレーザー光６を、光学系４により容器１の垂直壁１Ａの上端面又はこれから僅かに離れた所要深さの位置に焦点が合うように集束して照射する。
【選択図】図１

Description

本発明は、複数の樹脂材料のレーザー溶着方法に関し、特に複数の樹脂材料を直交状態に接触させた状態において、一方の樹脂材料の端面における一部のみを溶融させて結合を行うに適したレーザー溶着方法に係わる。
従来、複数の樹脂材料を溶着して結合するための手段の一つとしてレーザー溶着方法がある。該レーザー溶着方法は、光透過性の樹脂材料と、光吸収性の樹脂材料とを接触させて加圧保持し、レーザー光を光透過性の樹脂材料を介して光吸収性の樹脂材料の一部に照射し、該光吸収性の樹脂材料の照射部分にレーザー光のエネルギーを吸収させることによって発熱、溶融させると共に、その熱の一部を照射部分に接触している光透過性の樹脂材料の一部に与えてその部分の温度を上昇させて溶融、融合させ、その後融合部分を冷却、固化させてこれら光透過性の樹脂材料と光吸収性の樹脂材料とを結合するものである。
ところで、容器を光吸収性の樹脂材料、蓋を光透過性の樹脂材料で成形した樹脂材料からなる蓋付容器にあっては、この容器と蓋との接触部分をレーザー溶着により結合する場合がある。
斯かる場合において、レーザーによる溶着幅がレーザービーム幅より狭い場合は、従来のレーザー溶着方法によって溶着を行った場合には、レーザーの照射幅が広すぎるため、溶着部以外にダメージを与えてしまう場合がある。即ち、従来のレーザー溶着方法によると、光透過性の樹脂材料からなる蓋と、光吸収性の樹脂材料からなる容器とを、蓋に対して容器の垂直壁が直交状態になるようにして接触させ、レーザー光を蓋を介して容器の垂直壁の端面に照射している。そして、この場合には、容器の垂直壁の端面が肉圧の全域に亘って一様に発熱、溶融されることになり、蓋との溶着は広い範囲に亘って行われることになる。このため蓋を外すのに大変な手間と時間がかかることになる。そこで、容器の垂直壁の端面における一部のみを溶融させることができるようになすためのレーザー溶着方法が要望されている。
本発明は上記の点に鑑みなされたものであって、複数の樹脂材料を直交状態に接触させた状態において、一方の樹脂材料の端面における一部のみを溶融させて結合を行うことができるようになしたレーザー溶着方法を提供せんとするものである。
而して、本発明の要旨とするところは、光透過性の樹脂材料と、光吸収性の樹脂材料とを接触させて加圧保持し、レーザー光を光透過性の樹脂材料を介して光吸収性の樹脂材料の一部に照射し、該光吸収性の樹脂材料の照射部分にレーザー光のエネルギーを吸収させることによって発熱、溶融させると共に、その熱の一部を照射部分に接触している光透過性の樹脂材料の一部に与えてその部分の温度を上昇させて溶融、融合させ、その後融合部分を冷却、固化させてこれら光透過性の樹脂材料と光吸収性の樹脂材料とを結合する複数の樹脂材料のレーザー溶着方法において、光吸収性の樹脂材料は、光透過性の樹脂材料との接触側部分を、縦断面形状において、端面に溶融すべき所要範囲のフラット部分を残して３６度乃至４１度の傾斜面となし、一方、光透過性の樹脂材料は、光吸収性の樹脂材料との接触側部分を、縦断面形状において、光吸収性の樹脂材料の端面におけるフラット部分に接触するフラット部分と、これに連なる、光吸収性の樹脂材料の傾斜面と平行する傾斜面となし、これら光透過性の樹脂材料と光吸収性の樹脂材料とを、光透過性の樹脂材料のフラット部分に対して光吸収性の樹脂材料のフラットな端面が当接するよう直交状態に接触させ、レーザー光を、光学系により光吸収性の樹脂材料の端面又はこれから僅かに離れた所要深さの位置に焦点が合うように集束して照射するようになしたことを特徴とする複数の樹脂材料のレーザー溶着方法にある。
また、上記レーザー溶着方法は、光吸収性の樹脂材料を容器とし、光透過性の樹脂材料を前記容器の開口部に被せるキャップ状の蓋とし、これらを溶着する場合に好適に実施することができる。
本発明によれば、複数の樹脂材料を直交状態に接触させた状態において、一方の樹脂材料の端面における一部のみを溶融させて結合を行うことができるものである。
本発明を実施するための最良の形態は、複数の樹脂材料のレーザー溶着方法において、光吸収性の樹脂材料は、光透過性の樹脂材料との接触側部分を、縦断面形状において、端面に溶融すべき所要範囲のフラット部分を残して３６度乃至４１度の傾斜面となし、一方、光透過性の樹脂材料は、光吸収性の樹脂材料との接触側部分を、縦断面形状において、光吸収性の樹脂材料の端面におけるフラット部分に接触するフラット部分と、これに連なる、光吸収性の樹脂材料の傾斜面と平行する傾斜面となし、これら光透過性の樹脂材料と光吸収性の樹脂材料とを、光透過性の樹脂材料のフラット部分に対して光吸収性の樹脂材料のフラットな端面が当接するよう直交状態に接触させ、レーザー光を、光学系により光吸収性の樹脂材料の端面又はこれから僅かに離れた所要深さの位置に焦点が合うように集束して照射するようになすことにある。
以下、本発明の実施例について説明する。
図１は本発明の一実施例に係るレーザー溶着方法の説明図、図２は樹脂材料からなる蓋付容器の溶着前の状態の断面図、図３はレーザー光の照射状態を示す部分拡大断面図である。
図中、１、２は溶着すべき複数の樹脂材料である。また、該樹脂材料は、本実施例においては、１を光吸収性の樹脂材料からなる容器とし、２を光透過性の樹脂材料からなるキャップ状の蓋としている。
また、光吸収性の樹脂材料からなる容器１は、本実施例においては直径を３０ｍｍ、高さを１８ｍｍ、垂直壁１Ａ及び底壁１Ｂの厚味を夫々３ｍｍ、垂直壁１Ａの上端面の溶融すべきフラット部分１ａの幅を０．５ｍｍ、垂直壁１Ａ上部の前記フラット部分１ａに連なる外側傾斜面１ｂの傾斜角度θ１を３８度としている。尚、該外側傾斜面１ｂの傾斜角度θ１については、３６度乃至４１度の範囲内において適宜に決定される。
また、光透過性の樹脂材料からなるキャップ状の蓋２は、本実施例においては直径を３４ｍｍ、高さを４．０６ｍｍ、天壁２Ａの厚味を１．５ｍｍ、外周の垂直壁２Ｂの前記容器１の外側傾斜面１ｂと平行する内側傾斜面２ｂの角度θ２を５２度、内側傾斜面２ｂの傾斜始端２ｂ′から垂直壁２Ｂの外周面までを８ｍｍとしている。
これら容器１とキャップ状の蓋２とは、容器１の開口部にキャップ状の蓋２を被せた状態において保持し、更にキャップ状の蓋２の上部に所定の厚味（本実施例では９ｍｍ）の加圧用ガラス３を載置する。
４はレーザー光を集束する光学系であり、レーザー光を容器１の垂直壁１Ａの上端面又はこれから僅かに離れた所要深さの位置（本実施例では０．５ｍｍ）に焦点が合うように集束して照射するようになすものである。また、該光学系４は本実施例では直径３２．３６ｍｍの円筒形光学レンズを用いている。尚、これ以外のレンズを用いるようにしてもよい。また、該円筒形光学レンズ４は、前記加圧用ガラス３の上方において、該加圧用ガラス３から１９．７８ｍｍ離して配設している。
５はレーザー光源であり、前記光学系である円筒形光学レンズ４と平行して配設し、本実施例においてはレーザー光を帯状に放射するものを用いている。６はレーザー光である。また、該レーザー光源５は、前記加圧用ガラス３の上方において、該加圧用ガラス３から７５．９７ｍｍ離して配設している。また、該レーザー光源５は、図示はしないが可撓性のある光ファイバーを用いて前記光学系４に接続するようにしてもよい。そしてまた、本実施例にいては、レーザー光６が５．０８ｍｍに集束された位置（図１中６Ａの位置）が溶着に最も有効なレーザーエネルギー密度となり、この集束された位置を、容器１の垂直壁１Ａの上端面又はこれから僅かに離れた所要深さの位置（本実施例では０．５ｍｍ）に合わせるものである。尚、レーザー光のエネルギーは、この集束された位置を過ぎると次第に減衰する。
次に、上記実施例による溶着方法について説明する。
レーザー光源５からのレーザー光６を光学系４によって集束し、加圧用ガラス３及びキャップ状の蓋２を介して容器１の垂直壁１Ａの上端面に照射する。このときに於けるレーザー光６の状態は、図３に示す通りであり、キャップ状の蓋２内に入射したレーザー光６のうち、蓋２の垂直壁２Ｂの内側傾斜面２ｂに当たったものは全反射して垂直壁２Ｂの外側に屈折し、容器１の垂直壁１Ａの外側傾斜面１ｂには殆ど入射しない。したがって、この部分は発熱しない。そして、蓋２内に入射したレーザー光６のうちの一部が容器１の垂直壁１Ａの上端面におけるフラット部分１ａに照射されることになる。これにより該部分のみが発熱して溶融することになるものである。
そしてまた、本実施例においては、レーザー光源５を固定し、加圧用ガラス３、蓋２並びに容器１を一体的に水平方向に移動させ、レーザー光６の照射部分をずらしているが、これを逆にしてレーザー光源５を移動するようにしてもよい。
また、容器１と蓋２の間において、容器１の開口部の一部に接合しない部分を残す必要がある場合には、容器１の垂直壁１Ａの上端面のフラット部分１ａにおける所要箇所を所要の深さ（上端面から０．５ｍｍ以上の深さ）及び長さに亘って窪ませておけばよく、これにより該部分は発熱せず、もって溶融しない。
本発明の一実施例に係るレーザー溶着方法の説明図である。 樹脂材料からなる蓋付容器の溶着前の状態の断面図である。 レーザー光の照射状態を示す部分拡大断面図である。
符号の説明
１ 光吸収性の樹脂材料からなる容器
１Ａ 垂直壁
１ａ フラット部分
１ｂ 外側傾斜面
２ 光透過性の樹脂材料からなるキャップ状の蓋
２Ａ 天壁
２Ｂ 垂直壁
２ｂ 内側傾斜面
３ 加圧用ガラス
４ 光学系
５ レーザー光源
６ レーザー光

Claims (2)

  1. 光透過性の樹脂材料と、光吸収性の樹脂材料とを接触させて加圧保持し、レーザー光を光透過性の樹脂材料を介して光吸収性の樹脂材料の一部に照射し、該光吸収性の樹脂材料の照射部分にレーザー光のエネルギーを吸収させることによって発熱、溶融させると共に、その熱の一部を照射部分に接触している光透過性の樹脂材料の一部に与えてその部分の温度を上昇させて溶融、融合させ、その後融合部分を冷却、固化させてこれら光透過性の樹脂材料と光吸収性の樹脂材料とを結合する複数の樹脂材料のレーザー溶着方法において、光吸収性の樹脂材料は、光透過性の樹脂材料との接触側部分を、縦断面形状において、端面に溶融すべき所要範囲のフラット部分を残して３６度乃至４１度の傾斜面となし、一方、光透過性の樹脂材料は、光吸収性の樹脂材料との接触側部分を、縦断面形状において、光吸収性の樹脂材料の端面におけるフラット部分に接触するフラット部分と、これに連なる、光吸収性の樹脂材料の傾斜面と平行する傾斜面となし、これら光透過性の樹脂材料と光吸収性の樹脂材料とを、光透過性の樹脂材料のフラット部分に対して光吸収性の樹脂材料のフラットな端面が当接するよう直交状態に接触させ、レーザー光を、光学系により光吸収性の樹脂材料の端面又はこれから僅かに離れた所要深さの位置に焦点が合うように集束して照射するようになしたことを特徴とする複数の樹脂材料のレーザー溶着方法。
  2. 光吸収性の樹脂材料か容器であり、光透過性の樹脂材料が前記容器の開口部に被せるキャップ状の蓋である請求項１記載の複数の樹脂材料のレーザー溶着方法。
JP2007064612A 2007-03-14 2007-03-14 複数の樹脂材料のレーザー溶着方法 Pending JP2008221684A (ja)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013001432A (ja) * 2011-06-17 2013-01-07 Toyo Seikan Kaisha Ltd レーザ溶着密封容器及びその製造方法
WO2017153493A1 (de) * 2016-03-11 2017-09-14 Aft Automotive Gmbh Verfahren zum herstellen einer formteilanordnung sowie entsprechende herstellungseinrichtung

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013001432A (ja) * 2011-06-17 2013-01-07 Toyo Seikan Kaisha Ltd レーザ溶着密封容器及びその製造方法
WO2017153493A1 (de) * 2016-03-11 2017-09-14 Aft Automotive Gmbh Verfahren zum herstellen einer formteilanordnung sowie entsprechende herstellungseinrichtung

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