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JPH04255326A - Back sticker method - Google Patents

Back sticker method

Info

Publication number
JPH04255326A
JPH04255326A JP3036906A JP3690691A JPH04255326A JP H04255326 A JPH04255326 A JP H04255326A JP 3036906 A JP3036906 A JP 3036906A JP 3690691 A JP3690691 A JP 3690691A JP H04255326 A JPH04255326 A JP H04255326A
Authority
JP
Japan
Prior art keywords
laser beam
welding
film
pressure
tightly contacting
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
JP3036906A
Other languages
Japanese (ja)
Inventor
Mikio Tanaka
幹夫 田中
Takao Yamada
孝夫 山田
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 Chemical Corp
Original Assignee
Mitsubishi Plastics Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Plastics Industries Ltd filed Critical Mitsubishi Plastics Industries Ltd
Priority to JP3036906A priority Critical patent/JPH04255326A/en
Publication of JPH04255326A publication Critical patent/JPH04255326A/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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/36—Bending and joining, e.g. for making hollow articles
    • B29C53/38—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
    • B29C53/48—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/112—Single lapped joints
    • B29C66/1122—Single lap to lap joints, i.e. overlap joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43—Joining a relatively small portion of the surface of said articles
    • B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
    • 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
    • B29C66/8145—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps
    • B29C66/81463—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint
    • B29C66/81465—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 constructional aspects of the pressing elements, e.g. of the welding jaws or clamps comprising a plurality of single pressing elements, e.g. a plurality of sonotrodes, or comprising a plurality of single counter-pressing elements, e.g. a plurality of anvils, said plurality of said single elements being suitable for making a single joint one placed behind the other in a single row in the feed direction
    • 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
    • B29C66/834—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools moving with the parts to be joined
    • B29C66/8341—Roller, cylinder or drum types; Band or belt types; Ball types
    • B29C66/83431—Roller, cylinder or drum types; Band or belt types; Ball types rollers, cylinders or drums cooperating with bands or belts

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To make it possible to perform continuously uniform joining by a method wherein a continuously delivered flat film is bent into a cylindrical shape and the laminated tightly contacting part is irradiated with a laser beam and then, pressure is applied on the tightly contacting part just after irradiation to perform pressure welding. CONSTITUTION:A synthetic resin-made flat film 1 continuously delivered is bent into a cylindrical shape by means of a forming plate 2 and a bending tool 3. This bent cylindrical film is laminated on the central upper part of the forming plate 2 and the tightly contacting part is irradiated from the upper part with a laser beam by means of a laser beam irradiating apparatus 4 to weld the film of that part. Outer force is immediately applied on the welded tightly contacting part to perform welding. It is possible to perform uniform joining by performing pressure welding just after welding even when welding of the tightly contacting part is not uniform as it is done before welded part is solidified.

Description

【発明の詳細な説明】[Detailed description of the invention]

【０００１】0001

【産業上の利用分野】本発明は合成樹脂製のフラットフ
イルムを筒状に折り曲げ、レーザビームにより背貼りシ
ールする方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of bending a synthetic resin flat film into a cylindrical shape and pasting and sealing the film on the back using a laser beam.

【０００２】0002

【従来の技術及びその課題】従来、レーザビームにより
合成樹脂フイルムを背貼りシールする場合、フラットな
合成樹脂フイルムをフォーミングプレートに導いて筒状
とし、合成樹脂フイルム端部同志の密着部にレーザビー
ムを照射して溶着により接合していた。しかしながら、
フイルムの変形等により重ね合せたフイルム間に空間を
生じて溶着が不均一になって接合部分の接合が悪くなり
、袋として使用した場合、内容物が洩れたり接合部分が
破損するという問題があった。また、レーザビームを片
側から照射するため両方のフイルム間に温度差を生じ、
その結果フイルムの収縮に差があるため接合部が変形し
外観が悪くなるという問題があった。[Prior art and its problems] Conventionally, when back-sealing a synthetic resin film using a laser beam, a flat synthetic resin film is guided to a forming plate to form a cylinder, and the laser beam is applied to the close contact portions of the ends of the synthetic resin film. They were joined by welding and irradiation. however,
Due to deformation of the films, spaces are created between the stacked films, resulting in uneven welding and poor bonding at the joints. When used as bags, there are problems such as leakage of contents or damage to the joints. Ta. Also, since the laser beam is irradiated from one side, a temperature difference occurs between both films.
As a result, there is a problem in that the bonded portion is deformed due to differences in shrinkage of the film, resulting in poor appearance.

【０００３】0003

【課題を解決するための手段】本発明はレーザビームを
照射した直後の密着部に外圧を加えて圧接することによ
り上記問題点を解消できることを見出したものである。 以下、本発明を図面により説明する。図１は本発明の方
法に使用する装置の一例を示す斜視図であり、図２は図
１に示した装置の一部縦断面概略図である。図１に示す
ように連続的に繰出される合成樹脂製のフラットフイル
ム１はフォーミングプレート２及び折曲げ用治具３によ
り筒状に折込まれる。この折込まれた筒状フイルムはフ
ォーミングプレート２の中心上部で重ね合され、その密
着部に上部からレーザビーム照射装置４によりレーザビ
ームが照射されてその部分のフイルムが溶着される。レ
ーザビーム照射装置４の直下のフォーミングプレート上
にはレーザビーム受け用の中子５が設けられている。SUMMARY OF THE INVENTION In the present invention, it has been discovered that the above-mentioned problems can be solved by applying external pressure to the contact area immediately after irradiation with a laser beam for pressure contact. Hereinafter, the present invention will be explained with reference to the drawings. FIG. 1 is a perspective view showing an example of an apparatus used in the method of the present invention, and FIG. 2 is a schematic partial vertical cross-sectional view of the apparatus shown in FIG. As shown in FIG. 1, a synthetic resin flat film 1 that is continuously fed out is folded into a cylindrical shape by a forming plate 2 and a bending jig 3. The folded cylindrical films are overlapped at the upper center of the forming plate 2, and the laser beam irradiation device 4 irradiates the close contact portion with a laser beam from above to weld that portion of the film. A core 5 for receiving a laser beam is provided on the forming plate directly below the laser beam irradiation device 4.

【０００４】本発明では溶着された密着部は直ちに外力
を加えて圧接する必要がある。このように溶着直後に圧
接することにより、たとえ密接部の溶着が不均一であっ
ても溶着部分が固化する前であるため均一な接合が可能
になる。ここで圧接には種々の方法があるが、密着部を
挟持するように設けた複数の回転体で圧接する方法が連
続的な接合が確実にできて好ましい。この回転体として
は図１，２に示した装置では筒状フイルム内部のフォー
ミングプレート２上に設けた回転ベルト７と外部に設け
た加圧ローラー６により挟持し圧接するようになってい
る。[0004] In the present invention, it is necessary to apply an external force immediately to press the welded contact portion. In this way, by pressure-welding immediately after welding, even if the welding is uneven in the close contact area, uniform joining is possible because the welded part has not yet solidified. Although there are various methods for pressure-welding, a method of pressure-welding using a plurality of rotary bodies provided so as to sandwich the contact portion is preferable because continuous bonding can be ensured. In the apparatus shown in FIGS. 1 and 2, this rotating body is sandwiched and pressed between a rotating belt 7 provided on a forming plate 2 inside the cylindrical film and a pressure roller 6 provided outside.

【０００５】回転ベルト７は両端に小径のベアリングを
設けたガイド部８により滑らかな回転が可能である。ま
た加圧ローラー６は密着部に加える圧力を調整可能な機
構を有し、また圧接をより安定にするため２個以上のロ
ーラーを設けるのが好ましい。[0005] The rotating belt 7 can be smoothly rotated by a guide portion 8 provided with small diameter bearings at both ends. Further, the pressure roller 6 has a mechanism that can adjust the pressure applied to the contact portion, and it is preferable to provide two or more rollers in order to make the pressure contact more stable.

【０００６】フォーミングプレート２の下部にはフォー
ミングプレート受け用ローラー９が複数個設けられ、加
圧によるフォーミングプレートの曲りを防止すると共に
フイルムとフォーミングプレート２間との摩擦抵抗を減
少できる。A plurality of forming plate receiving rollers 9 are provided at the bottom of the forming plate 2 to prevent the forming plate from bending due to pressure and to reduce the frictional resistance between the film and the forming plate 2.

【０００７】[0007]

【発明の効果】上述したように本発明によれば、レーザ
ビーム照射により生じた溶着不良部分を照射直後に加圧
することにより均一に溶着することができるため接合部
分の強度が良好であり、また安定した連続的な接合が可
能になるという利点がある。また圧接の手段を回転体に
すればより安定した高速の接合が可能になり、さらにフ
イルムの厚み等による調整が容易になる利点がある。As described above, according to the present invention, the welding defects caused by laser beam irradiation can be uniformly welded by applying pressure immediately after irradiation, so the strength of the joint is good, and This has the advantage that stable and continuous bonding is possible. Further, if a rotating body is used as the pressure welding means, more stable and high-speed joining is possible, and furthermore, there is an advantage that adjustment according to the thickness of the film, etc. can be made easier.

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

【図１】本発明に使用する装置の一例を斜視図で示す。FIG. 1 shows a perspective view of an example of a device used in the present invention.

【図２】図１に示した装置の一部を縦断面概略図で示す
。2 shows a part of the device shown in FIG. 1 in a schematic longitudinal section; FIG.

【符号の説明】[Explanation of symbols]

１　　　　フイルム ２　　　　フォーミングプレート ３　　　　折り曲げ用治具 ４　　　　レーザビーム照射装置 ６　　　　加圧ローラー ７　　　　回転ベルト 1 Film 2 Forming plate 3 Bending jig 4 Laser beam irradiation device 6 Pressure roller 7 Rotating belt

Claims (2)

【特許請求の範囲】[Claims] 【請求項１】　　連続的に繰り出されるフラットフイル
ムを筒状に折り曲げ、その重ね合せた密着部にレーザビ
ームを照射し、ついで、照射直後の密着部に外圧を加え
て圧接することにより連続的に接合を行なうことを特徴
とする背貼りシール方法。[Claim 1] A continuously unrolled flat film is folded into a cylindrical shape, a laser beam is irradiated to the overlapping contact area, and then external pressure is applied to the contact area immediately after irradiation to bring the film into pressure contact. A back sticker method characterized by joining. 【請求項２】　　連続的に繰り出されるフラットフイル
ムを筒状に折り曲げ、その重ね合せた密着部にレーザビ
ームを照射し、ついで、照射直後の密着部を挟持するよ
うに設けた複数の回転体で圧接することにより連続的に
接合を行なうことを特徴とする請求項１記載の背貼りシ
ール方法。[Claim 2] A continuously unrolled flat film is bent into a cylindrical shape, a laser beam is irradiated onto the overlapped contact portion, and then a plurality of rotating bodies are installed to sandwich the contact portion immediately after irradiation. 2. The back sealing method according to claim 1, wherein the bonding is performed continuously by pressure contact.
JP3036906A 1991-02-06 1991-02-06 Back sticker method Pending JPH04255326A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP3036906A JPH04255326A (en) 1991-02-06 1991-02-06 Back sticker method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP3036906A JPH04255326A (en) 1991-02-06 1991-02-06 Back sticker method

Publications (1)

Publication Number Publication Date
JPH04255326A true JPH04255326A (en) 1992-09-10

Family

ID=12482820

Family Applications (1)

Application Number Title Priority Date Filing Date
JP3036906A Pending JPH04255326A (en) 1991-02-06 1991-02-06 Back sticker method

Country Status (1)

Country Link
JP (1) JPH04255326A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001043949A1 (en) * 1999-12-17 2001-06-21 Lemo Maschinenbau Gmbh Device for fabricating moving widths of plastic film

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001043949A1 (en) * 1999-12-17 2001-06-21 Lemo Maschinenbau Gmbh Device for fabricating moving widths of plastic film

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