JPS6262734A - Jointing of thermoplastic resin with laser - Google Patents

Jointing of thermoplastic resin with laser

Info

Publication number
JPS6262734A
JPS6262734A JP60201810A JP20181085A JPS6262734A JP S6262734 A JPS6262734 A JP S6262734A JP 60201810 A JP60201810 A JP 60201810A JP 20181085 A JP20181085 A JP 20181085A JP S6262734 A JPS6262734 A JP S6262734A
Authority
JP
Japan
Prior art keywords
polyethylene
jointing
laser beam
jointing part
joint
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
JP60201810A
Other languages
Japanese (ja)
Inventor
Minoru Nakatani
中谷　實
Shinji Tomonaga
朝長　真二
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP60201810A priority Critical patent/JPS6262734A/en
Publication of JPS6262734A publication Critical patent/JPS6262734A/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
    • B29C66/01—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
    • 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
    • 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
    • B29C65/1654—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined
    • B29C65/1658—Laser beams characterised by the way of heating the interface scanning at least one of the parts to be joined scanning once, e.g. contour laser 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
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/73—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
    • 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
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • B29C66/0044—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined using a separating sheet, e.g. fixed on the joining tool
    • 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
    • B29C66/435—Making large sheets by joining smaller ones or strips together
    • 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
    • B29C66/8122—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
    • B29C66/83—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • Toxicology (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To obtain a method for jointing by which the jointing can be carried out continuously with high speed and high strength and excellent in air-tightness of the jointing part, by piling up thermoplastic resins and radiating a defocused laser beam on the jointing part. CONSTITUTION:When polyethylene 1, 1a are jointed by means of a laser treating machine, the focus 16 of a laser beam is set above the jointing part 18 of polyethylene 1, 1a. The distance between the focus 16 and the jointing part 18 can be determined by the conditions related with the jointing object such as thickness, melt viscosity and the jointing width of the jointing part 18 of polyethylene 1, 1a and by the conditions related with the laser treating machine such as the output of the laser beam. The focus 16 is thereby set above the jointing part 18 of polyethylene 1, 1a and the jointing part 18 is continuously and with high speed by moving either the defocused laser beam by means of a treating head 10 or polyethylene 1, 1a. As the defocused laser beam 14 is directly radiated on the jointing part 18 of polyethylene, an excellent jointed surface can be formed.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明はレーザによる熱可塑性樹脂の接合方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] This invention relates to a method for joining thermoplastic resins using a laser.

〔従来の技術〕[Conventional technology]

第３図は従来のヒーターによるポリエチレンの接合方法
を示す説明図である。図において、（１）　。FIG. 3 is an explanatory diagram showing a conventional method of joining polyethylene using a heater. In the figure, (1).

（１ａ）は板状またはシート状のポリエチレン、（２）
。(1a) is plate-shaped or sheet-shaped polyethylene, (2)
.

（２ａ）はヒートシーラのヒーターである。従来のヒー
ターによるポリエチレンの接合は、以上のように重ね合
せたポリエチレンを接合部（３）で両側よりヒーター（
２）、（２ａ）よシ加熱して接合部を軟化した後上下よ
り加圧して圧着し接合していた。(2a) is a heater for a heat sealer. In conventional joining of polyethylene using a heater, the polyethylene stacked as described above is heated from both sides at the joint (3).
2), (2a) After the joint was heated to soften it, pressure was applied from above and below to bond it.

参考写真（２）はこのように接合したポリエチレンの接
合部の断面の倍率が１０倍のマクロ写真であわした説明
図で、図において、（４）は接合部、記号Ｔｌは溶着部
の＠を示すものである。このように従来のヒーターによ
るポリエチレンの接合方法では、接合部（４）は断続的
な接合面となっており、しかも接合強度は接合面の面積
およびその界面の状態に影響されるから、上記のような
断続的な接合では、接合強度（継手強度）が低く、気密
性に欠ける。Reference photo (2) is an explanatory diagram of a cross section of the polyethylene joint joined in this way, with a magnification of 10 times. It shows. In this way, in the conventional method of joining polyethylene using a heater, the joint (4) is an intermittent joint surface, and the joint strength is affected by the area of the joint surface and the state of the interface. Such intermittent joints have low joint strength (joint strength) and lack airtightness.

またヒーターによる加熱では、ポリエチレンはシリコン
製の布等のポリエチレンが付着しない材料を介してヒー
ター（２）、（２ａ）によって加熱せざるを得ないので
、ポリエチレンを軟化して接合状態にするのに時間が長
くなり、高速で接合する場合も毎分２０ｍ程度が限度で
あった。In addition, when heating with a heater, polyethylene must be heated by heaters (2) and (2a) through a material to which polyethylene does not adhere, such as silicone cloth, so it is difficult to soften the polyethylene and make it into a bonded state. It takes a long time, and even when joining at high speed, the limit was about 20 m/min.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上記のような従来のポリエチレンの接合方法では、接合
時間が長く、かつ接合部が断続的となυ、不均一である
ため気密性に欠ける。そのため接合部の強度が弱くなシ
、厚手のシート等によシ袋にした場合は液体の内容物の
漏れが生じたシ、あるいは成型品の場合は接合部より容
易に破損するという問題があった。In the conventional polyethylene bonding method as described above, the bonding time is long and the bonded portions are intermittent and non-uniform, resulting in a lack of airtightness. As a result, there are problems such as the strength of the joints being weak, the liquid contents leaking when the bags are made of thick sheets, or the joints breaking easily in the case of molded products. Ta.

この発明は上記のような問題点を解決するためになされ
たもので、連続かつ高速に接合でき、しかも接合部の強
度が犬きくて気密性に優れた熱可塑性樹脂の接合方法を
得ることを目的とする。This invention was made in order to solve the above-mentioned problems, and aims to provide a method for joining thermoplastic resins that can be joined continuously and at high speed, and that has excellent joint strength and airtightness. purpose.

〔問題点を解決するための手段〕[Means for solving problems]

この発明に係る接合方法は、熱可塑性樹脂を重ね合せて
その接合部にデフォーカスし次レーザビームを投射する
ようにしたものである。In the bonding method according to the present invention, thermoplastic resins are stacked one on top of the other, the bonded portion is defocused, and then a laser beam is projected onto the bonded portion.

〔作用〕 この発明においては、デフォーカスしたレーザビームが
重ね合せた熱可塑性樹脂の接合部に投射されて樹脂を溶
着させるので、溶着時に圧力が負荷されず、そのため溶
着時の樹脂のマクロ的構造が変化せず、レーザによシ均
一な接合面が形成される。[Function] In this invention, a defocused laser beam is projected onto the joint of superimposed thermoplastic resins to weld the resins, so no pressure is applied during welding, and therefore the macroscopic structure of the resin during welding is reduced. does not change, and a uniform bonding surface is formed by the laser.

〔実施例〕〔Example〕

第１図はこの発明の一実施例の説明図である。 FIG. 1 is an explanatory diagram of an embodiment of the present invention.

図において、（１）、（Ｉｍ）は従来の方法で使用した
もの同一のポリエチレンのシートま次は板状のものであ
る。αＱはレーザ加工機の加工ヘッド、α２は集光レン
ズα４はレーザビーム、αｅはレーザビームα滲の集光
された焦点である。以上のレーザ加工機においてポリエ
チレン（１）、（１ａ）を接合する場合、レーザビーム
の焦点（１ｅをポリエチレン（１）、（１ａ）の接合部
αυの上方に位置させて設定する。なお、焦点αＱと接
合部α槌との距離はポリエチレン（１）。In the figure, (1) and (Im) are plate-shaped polyethylene sheets that are the same as those used in the conventional method. αQ is the processing head of the laser beam machine, α2 is the condenser lens α4, is the laser beam, and αe is the focused focus of the laser beam α. When joining polyethylene (1) and (1a) with the above laser processing machine, the focus of the laser beam (1e is set to be located above the joint αυ of polyethylene (1) and (1a). The distance between αQ and the joint α mallet is polyethylene (1).

（１ａ）の厚さ、溶融温度および接合部ａ８の接合部等
の接合対象についての条件とレーザビ・−ムの出力等の
レーザ加工機の条件とにょシ決められる。The conditions for the objects to be joined, such as the thickness of (1a), the melting temperature, and the joint part of joint part a8, and the conditions of the laser processing machine, such as the output of the laser beam, are determined.

例えばシングルモードのビームの出力が２００Ｗテ集光
レンズα２の焦点距離が１２．５Ｉ：！ｎ（５インｆ　
）の場合、接合部α均と焦点αｅの距離は４０〜５０＋
ｏ＋程度であり、これら条件の前後−１００〜１００％
の範囲にあれば熱可塑性樹脂の接合をすることができる
。For example, if the single mode beam output is 200W, the focal length of the condenser lens α2 is 12.5I:! n (5 in f
), the distance between the junction α and the focal point αe is 40 to 50+
o+ degree, -100 to 100% before and after these conditions
If it is within this range, thermoplastic resin can be bonded.

このようにして焦点（１６１をポリエチレン（”）、（
１ａ）の接合部０秒よシ上方に位置させて、デフォーカ
スしたレーザビームａ荀ヲ加工ヘッドαＱによシ動かす
かまたは、ポリエチレン（１）、（Ｉａ）ｅ動かすこと
により接合部αＱが連続して高速に接合される。なお、
レーザビームの出力は適宜出力を調整するようにしても
よい。そして接合部α樟はデフォーカスされたレーザビ
ーム（１４）が直接ポリエチレンに投射されるので優れ
た接合面が形成される。参考写真（１）は、このように
してレーザビーム（１４）によシ接合されたポリエチレ
ン（１）、（１ａ）の接合部α槌で倍率図において、（
社）、（２０ａ）は接合面、に）は溶着部、記号Ｔ２は
溶着部（２）の幅を示す。この第２図から明らかなよう
に、レーザビームα荀に接合すると、接合面（２υ、　
（２０ａ）は均一かつ均質で連続しておシ為そのため接
合部側の強度が著しく大きく、気密性も大きい。なおこ
のように接合部ａυが形成される要因は様々のものがあ
るが、従来のように、ポリエチレン（１）、（１ａ）が
軟化状態で上下から圧力を加えて接合しないので、ポリ
エチレン（１）、（Ｉａ）の本来のマクロ構造等に変化
がないことも要因の一つに挙げられる。また、従来の方
法では、接合する対象（ポリエチレン）の形状、大きさ
等は、ヒーター（２）　、（２ａ）の収納されているシ
ーラーの部分により著しく制約を受けるが、この発明に
おいては、かかる制約はなく、Ｎｃ制御されたテーブル
及び加工ヘッドαｌ−任意に動かせるので、任意形状の
接合が可能となる。In this way, focus (161) is polyethylene (''), (
Position the joint part 1a) for 0 seconds and move the defocused laser beam a to the processing head αQ, or move the polyethylene (1), (Ia)e to make the joint part αQ continuous. and can be joined at high speed. In addition,
The output of the laser beam may be adjusted as appropriate. Since the defocused laser beam (14) is directly projected onto the polyethylene at the joint part α, an excellent joint surface is formed. Reference photograph (1) shows the joint part of polyethylene (1) and (1a) joined by laser beam (14) in this way.
(20a) is the joint surface, 2) is the welded portion, and symbol T2 is the width of the welded portion (2). As is clear from Fig. 2, when bonded to the laser beam α, the bonded surface (2υ,
(20a) is uniform, homogeneous, and continuous, so the strength on the joint side is extremely high and the airtightness is also high. There are various factors that lead to the formation of the joint aυ, but unlike conventional methods, polyethylene (1) and (1a) are not joined by applying pressure from above and below while they are in a softened state. ), (Ia) that there is no change in the original macrostructure etc. is also cited as one of the factors. In addition, in the conventional method, the shape, size, etc. of the object to be joined (polyethylene) is significantly restricted by the part of the sealer in which the heaters (2) and (2a) are housed, but in the present invention, such There are no restrictions, and the Nc-controlled table and processing head αl can be moved arbitrarily, making it possible to join any shape.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、この発明はデフォーカスしたレー
ザビームにより熱可塑性樹脂を接合するようにしたので
、接合部に高い信頼性があり、接合した製品自体の技術
的価値が高くなシ、かつ連続して高速で任意形状の熱可
塑性樹脂の接合をすることができる等の優れた効果があ
る。As explained above, this invention uses a defocused laser beam to join thermoplastic resins, so the joints are highly reliable, the joined products themselves have high technical value, and they are continuous. It has excellent effects such as being able to join thermoplastic resins of arbitrary shapes at high speed.

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

第１図はこの発明の一実施例の説明図、第２図この発明
による接合部の説明図、第６図は従来の方法の説明図、
第４図は従来の方法による接合部の説明図である。 図において、（１）、（１ａ）はポリエチレン、αＱは
レーザ加工ヘッド、α２は集光レンズ、００家レーザビ
ーム、αｅは焦点、αυは接合部である。 なお各図中、同一符号は同−又は相当部分を示すＯ 代理人　弁理士　　佐　藤　正　年 第１図 第２図FIG. 1 is an explanatory diagram of an embodiment of the present invention, FIG. 2 is an explanatory diagram of a joint according to the present invention, and FIG. 6 is an explanatory diagram of a conventional method.
FIG. 4 is an explanatory diagram of a joint made by a conventional method. In the figure, (1) and (1a) are polyethylene, αQ is a laser processing head, α2 is a condenser lens, 00 family laser beam, αe is a focal point, and αυ is a joint. In each figure, the same reference numerals indicate the same or equivalent parts.O Agent Patent Attorney Masaru Sato

Claims (1)

【特許請求の範囲】[Claims] 熱可塑性樹脂の接合において、重ね合せた熱可塑性樹脂
の接合部にデフォーカスしたレーザビームを投射するこ
とにより接合することを特徴とするレーザによる熱可塑
性樹脂の接合方法。1. A method for joining thermoplastic resins using a laser, characterized in that thermoplastic resins are joined by projecting a defocused laser beam onto a joint portion of stacked thermoplastic resins.
JP60201810A 1985-09-13 1985-09-13 Jointing of thermoplastic resin with laser Pending JPS6262734A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60201810A JPS6262734A (en) 1985-09-13 1985-09-13 Jointing of thermoplastic resin with laser

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60201810A JPS6262734A (en) 1985-09-13 1985-09-13 Jointing of thermoplastic resin with laser

Publications (1)

Publication Number Publication Date
JPS6262734A true JPS6262734A (en) 1987-03-19

Family

ID=16447288

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60201810A Pending JPS6262734A (en) 1985-09-13 1985-09-13 Jointing of thermoplastic resin with laser

Country Status (1)

Country Link
JP (1) JPS6262734A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5711838A (en) * 1990-07-04 1998-01-27 Firma Theodor Hymmen Method of and device for continuously or discontinuously manufacturing flat sheets of multiple-layer materials, laminates or similar articles
US6939502B2 (en) 1995-08-02 2005-09-06 Robert M. Lyden Method of making custom insoles and point of purchase display
JP2009532236A (en) * 2006-04-06 2009-09-10 フレゼニウス メディカル ケアー ドイチュラント ゲゼルシャフト ミット ベシュレンクテル ハフツング Laser transmission welding method for joining molded plastic bodies
JP2010000622A (en) * 2008-06-18 2010-01-07 Hamamatsu Photonics Kk Resin welding method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5711838A (en) * 1990-07-04 1998-01-27 Firma Theodor Hymmen Method of and device for continuously or discontinuously manufacturing flat sheets of multiple-layer materials, laminates or similar articles
US6939502B2 (en) 1995-08-02 2005-09-06 Robert M. Lyden Method of making custom insoles and point of purchase display
JP2009532236A (en) * 2006-04-06 2009-09-10 フレゼニウス メディカル ケアー ドイチュラント ゲゼルシャフト ミット ベシュレンクテル ハフツング Laser transmission welding method for joining molded plastic bodies
JP2010000622A (en) * 2008-06-18 2010-01-07 Hamamatsu Photonics Kk Resin welding method

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