JPH01105726A - Welding method of fluoroplastic sheet - Google Patents

Welding method of fluoroplastic sheet

Info

Publication number
JPH01105726A
JPH01105726A JP62263613A JP26361387A JPH01105726A JP H01105726 A JPH01105726 A JP H01105726A JP 62263613 A JP62263613 A JP 62263613A JP 26361387 A JP26361387 A JP 26361387A JP H01105726 A JPH01105726 A JP H01105726A
Authority
JP
Japan
Prior art keywords
heating element
shrinkage
jigs
sheets
welding
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
JP62263613A
Other languages
Japanese (ja)
Inventor
Yoshihiro Shimakura
嶋倉　義浩
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP62263613A priority Critical patent/JPH01105726A/en
Publication of JPH01105726A publication Critical patent/JPH01105726A/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
    • 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
    • B29C65/04—Dielectric heating, e.g. high-frequency welding, i.e. radio frequency welding of plastic materials having dielectric properties, e.g. PVC
    • 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
    • B29C66/45—Joining of substantially the whole surface of the 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
    • B29C66/71—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
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00—Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12—Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B29K2027/18—PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Treatments Of Macromolecular Shaped Articles (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

PURPOSE:To keep shrinkage of sheets,which develops at welding, to minimum by developing the shrinkage only in the clearances, with which jigs are mounted at both sides of a heating element by a method wherein pulse waves are applied across fluoroplastic sheets, each of which is brought into contact with the heating element and the jig mounted on one of both the sides of the heating element with said clearance and pressurized. CONSTITUTION:Jigs (plates or cushioning) are mounted with the clearances of several millimeters on both sides of a heating element and at the height same as that of the heating element to a supporting stand, on which the heating element is installed. The supporting stand equipped with the heating element and the jigs is served as a welding electrode part. Pulse waves are applied across fluoroplastic sheets, which are brought into contact with the welding electrode part and pressurized. Though the fluoroplastic sheets weld together by melting, the shrinkage developed at welding does not spread outside the jigs due to the jigs assembled in the welding electrode part or concretely the shrinkage develops in the clearances of several millimeters made between the heating element and the respective jigs.

Description

【発明の詳細な説明】 （イ）産業上の利用分野 この発明は、インパルス加熱方式でフッ素樹脂シートを
溶着する時、発生するフッ素樹脂シートのちぢみを最小
限に防止するための加工方法である。[Detailed description of the invention] (a) Industrial application field This invention is a processing method for minimizing the shrinkage of fluororesin sheets that occurs when welding fluororesin sheets using an impulse heating method. .

（ロ）従来の技術 フッ素樹脂シートは、その樹脂の特性から溶解溶着する
と溶着面端部にちぢみが広く発生し、そのちぢみがフレ
アーとなって広がり、製品はねじれ、商品としての価値
がなかった６ 現在の技術ではこのちぢみを除去する方法は見つかって
いない。そこでちぢみの出た製品や、溶着シートに熱や
テンションをかけ、ちぢみを伸ばす方法が行なわれてい
る。(b) Conventional technology When fluororesin sheets are melted and welded due to the characteristics of the resin, a wide curvature occurs at the edge of the welded surface, and the curvature spreads as a flare, causing the product to be twisted and having no value as a product. 6. With current technology, no method has been found to remove this shrinkage. Therefore, a method of applying heat and tension to products with wrinkles or welded sheets is used to smooth out the wrinkles.

しかしこの方法はコスト高となり、製品としての商品価
値も低く、製品の品質の安定も望めない。However, this method is expensive, has low commercial value as a product, and cannot be expected to have stable product quality.

（ハ）発明が解決しようとする問題点 したがって、フッ素樹脂シートの溶着時に出るちぢみを
如何に少なく出来るかが研究の課題であった。(c) Problems to be Solved by the Invention Therefore, the subject of research was how to reduce the shrinkage that occurs during welding of fluororesin sheets.

（ニ）問題を解決するための手段 本発明は、溶着時に発生するちぢみを最小限に押えるこ
とに成功したものである。その方法を説明すると １、発熱体を装着した保持台に、発熱体の面サイドに数
膿の間隔をあけ、発熱体と同程度の高さの治具（プレー
ト、クッション）を取付ける。(d) Means for Solving the Problems The present invention has succeeded in minimizing the shrinkage that occurs during welding. The method is explained as follows: 1. Attach a jig (plate, cushion) to the holding table on which the heating element is mounted, with a distance of a few inches on the side of the heating element, and a jig (plate, cushion) of the same height as the heating element.

２、発熱体と治具の付いた保持台を、溶着電極部としフ
ッ素樹脂シートを溶着電極部に接触させ、加圧パルス波
を通電する。2. A holding table with a heating element and a jig is used as a welding electrode, and a fluororesin sheet is brought into contact with the welding electrode, and a pressure pulse wave is applied.

３、フッ素樹脂シートは溶解溶着するが、溶着電極部と
して組み込まれている治具により、溶着時に発生するち
ぢみは治具より外側に波及しないで発熱体と治具との数
−の間隔の中でちぢみは起こる。3. Fluororesin sheets are melted and welded, but due to the jig incorporated as the welding electrode part, the shrinkage that occurs during welding does not spread beyond the jig, and is kept within the distance between the heating element and the jig. Shrinking happens.

（ホ）発明の効果 発熱体とその両サイドに間隔をあけ取付けた。(e) Effects of the invention It was installed with a space between the heating element and both sides of it.

治具との間隔内でのみ、ちぢみは発生し治具より外側に
波及しない為に、ちぢみは広い範囲に広がらず、製品は
ねじれが少なく、商品価値も高まり２度押しの必要も無
く、コストも低くなった。Shrinking occurs only within the distance from the jig and does not spread beyond the jig, so the shrinkage does not spread over a wide area, the product is less twisted, the product value is increased, there is no need for double pressing, and costs are reduced. has also become lower.

製品は安定しフッ素樹脂シートも広範囲の分野で使用さ
れるようになり、一般市場に普及する兆しをみせている
。The product has become stable, and fluororesin sheets are now being used in a wide range of fields, showing signs of becoming popular in the general market.

Claims (1)

【特許請求の範囲】[Claims] フッ素樹脂シートを、発熱体と発熱体の両サイドに間隔
をあけ取付けた、発熱体と同程度の高さの治具（プレー
ト、クッション）とに接触させ、圧力を加えパルス波を
通電し、発熱体端部に出るちぢみを、発熱体と治具との
間隔内で起こさせ、ちぢみが広範囲に及ぶのを防止する
加工方法。The fluororesin sheet is brought into contact with the heating element and a jig (plate, cushion) of the same height as the heating element, which is installed with a gap on both sides of the heating element, pressure is applied, and pulsed waves are applied. A processing method that causes the shrinkage that appears at the end of the heating element to occur within the space between the heat generating element and the jig, and prevents the shrinkage from spreading over a wide area.
JP62263613A 1987-10-19 1987-10-19 Welding method of fluoroplastic sheet Pending JPH01105726A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP62263613A JPH01105726A (en) 1987-10-19 1987-10-19 Welding method of fluoroplastic sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP62263613A JPH01105726A (en) 1987-10-19 1987-10-19 Welding method of fluoroplastic sheet

Publications (1)

Publication Number Publication Date
JPH01105726A true JPH01105726A (en) 1989-04-24

Family

ID=17391969

Family Applications (1)

Application Number Title Priority Date Filing Date
JP62263613A Pending JPH01105726A (en) 1987-10-19 1987-10-19 Welding method of fluoroplastic sheet

Country Status (1)

Country Link
JP (1) JPH01105726A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5251584A (en) * 1990-07-13 1993-10-12 Yamaha Hatsudoki Kabushiki Kaisha Two cycle engine
US5623895A (en) * 1994-02-07 1997-04-29 Yamaha Hatsudoki Kabushiki Kaisha V-type, multi-cylinder, two-cycle engine

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5251584A (en) * 1990-07-13 1993-10-12 Yamaha Hatsudoki Kabushiki Kaisha Two cycle engine
US5623895A (en) * 1994-02-07 1997-04-29 Yamaha Hatsudoki Kabushiki Kaisha V-type, multi-cylinder, two-cycle engine

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