JP2893808B2 - プラスチックシートの連続溶着・切断の方法 - Google Patents

プラスチックシートの連続溶着・切断の方法

Info

Publication number
JP2893808B2
JP2893808B2 JP2058029A JP5802990A JP2893808B2 JP 2893808 B2 JP2893808 B2 JP 2893808B2 JP 2058029 A JP2058029 A JP 2058029A JP 5802990 A JP5802990 A JP 5802990A JP 2893808 B2 JP2893808 B2 JP 2893808B2
Authority
JP
Japan
Prior art keywords
outer peripheral
receiving jig
peripheral surface
face
receiving tool
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.)
Expired - Fee Related
Application number
JP2058029A
Other languages
English (en)
Other versions
JPH03261540A (ja
Inventor
晶彦 斎藤
和弘 今泉
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.)
Sony Corp
Original Assignee
Sony Corp
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Filing date
Publication date
Application filed by Sony Corp filed Critical Sony Corp
Priority to JP2058029A priority Critical patent/JP2893808B2/ja
Publication of JPH03261540A publication Critical patent/JPH03261540A/ja
Application granted granted Critical
Publication of JP2893808B2 publication Critical patent/JP2893808B2/ja
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • B29C65/08—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations
    • B29C65/083—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil
    • B29C65/086—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using ultrasonic vibrations using a rotary sonotrode or a rotary anvil using a rotary anvil
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7435—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc the tool being a roller
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7443—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc by means of ultrasonic vibrations
    • 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
    • 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
    • B29C66/81422—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 convex
    • 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
    • B29C66/81425—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 stepped, e.g. comprising a shoulder
    • 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
    • B29C66/81427—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 ridge, e.g. for making a weakening line; comprising a single tooth
    • 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
    • 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
    • B29C66/83411—Roller, cylinder or drum types
    • 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
    • B29C2793/00—Shaping techniques involving a cutting or machining operation
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/743—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc
    • B29C65/7439—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area using the same tool for both joining and severing, said tool being monobloc or formed by several parts mounted together and forming a monobloc for continuously and longitudinally welding and severing webs
    • 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
    • B29C65/74—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by welding and severing, or by joining and severing, the severing being performed in the area to be joined, next to the area to be joined, in the joint area or next to the joint area
    • B29C65/749—Removing scrap
    • 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

Landscapes

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

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、熱可塑性のプラスチックシートの積層体を
連続的に線状ないし帯状に溶着するとともに、その溶着
部と平行して切断を行うプラスチックシートの連続溶着
・切断の方法に関するものである。
〔発明の概要〕
本発明は、回転軸を有する円柱状の受治具と、該受治
具外周面に対向して近接して設けた超音波ホーンによ
り、プラスチックシートの積層体を、前記超音波ホーン
の超音波振動により連続的に、線状ないし帯状に溶着す
るとともに、その溶着部と平行して切断を行うプラスチ
ックシートの連続溶着・切断の方法において、前記受治
具には少なくとも回転軸に略垂直な受治具垂直面を受治
具の外周面に沿って設け、一方、超音波ホーンの先端部
には、受治具外周面に対向して近接する面をもつ外周面
対向部と、前記受治具垂直面に対向して接する平行面を
もつ垂直面対向部を設けて、溶着は前記受治具外周面と
前記外周面対向部の作用で行われ、切断は前記受治具垂
直面と垂直面対向部の作用で行われるようにして、超音
波振動停止時の前記受治具外周面と前記外周面対向部と
の間隙を印加される超音波振動の振幅の1/2より大き
く、また印加される超音波周期の中で、最近接時の間隙
を溶着されるプラスチックシート１枚の厚さよりも小さ
くなるように設定することによって、超音波ホーンの先
端部および受治具の磨耗が少なく、かつ安定した溶着強
度および確実な切断を行うことができるプラスチックシ
ートの連続溶着・切断方法である。
〔従来の技術〕
熱可塑性のプラスチックシートの積層体を連続的に線
状ないし帯状に溶着するとともにその溶着部と平行して
切断を行うプラスチックシート（以下、単にシートを記
す）の連続溶着・切断の方法としては、超音波振動を用
いる方法、高周波の電磁波を用いる方法などがあるが、
作業性の良さなどの理由から、最近では超音波振動を用
いる方法がより多く用いられる。
次に、超音波振動を用いたシートの連続溶着・切断方
法の従来例を第７図ないし第11図を参照して説明する。
第７図は、従来例を示した全体構成図である。２枚の
シート25a、25bは第１のガイドローラ23で積層された後
に、回転軸を有する円柱状の受治具22と該受治具外周面
22aに対向して近接する面をもつ超音波ホーン（以下、
単にホーンと記す）先端部21の間隙に導かれ、そこで溶
着および切断が連続的に行われ、切断された端切れ27は
除かれて端部を溶着された積層シート26は第２のガイド
ローラ24を通して回収される。ここで用いられるホーン
先端部21と受治具外周面22aの近傍の模式的な拡大正面
図を第８図に示す。また、第９図、第10図はその模式的
拡大側面図であって、第９図は、シートの溶着、切断位
置を模式的に示し（28は溶着部を示す）、第10図では超
音波振動停止時の位置におけるホーン先端部21を実線
で、また超音波振動（振幅Ｐ）印加時の振動周期の中で
最近接時および最遠離時におけるホーン先端部21の位置
をいずれも破線で示している。第７図ないし第９図で示
すように、ホーン先端部21は先端が丸みをもっており、
第９図で示すようにその最先端部で切断が生じ、その周
辺部で溶着が生じるのである。第10図に示すように超音
波振動停止時のホーン先端部21と受治具外周面22aとの
間隙をＳとすると、切断が生じるためにはＳ≦P/2でな
ければならない。つまり切断のためにはホーン先端部21
を受治具外周面22aに押し当てて接触させなければなら
ない。
第11図は、別の従来例として示したもので、受治具32
の外周面32aに垂直面32bをもつ溝部32cを円周方向に設
け、溝部の角に丸みをもつホーンの先端部31を押し当て
て切断を行うとともに、溶着をその周辺で行う（例え
ば、特開昭63−145013を参照）。
〔発明が解決しようとする課題〕
しかしながら、いずれの場合においても、ホーンの先
端部を受治具外周面に押し当てて接触させる必要があ
り、必然的にホーン先端部を受治具の一方ないし両方が
磨耗し易い。そのためにホーン先端部と受治具外周面の
間隙の調整やホーン先端部や受治具の交換の頻度が高く
なり、生産性の低下、コストアップを招き、また溶着強
度が安定しなかったり、切断の確実性に欠けるなどの問
題があった。
〔課題を解決するための手段〕
本発明は、回転軸を有する円柱状の受治具と、該受治
具外周面に対向して近接して設けたホーンによりシート
積層体を前記ホーンの超音波振動により、連続的に線状
ないし帯状に溶着するとともに、その溶着部と平行して
切断を行うシートの連続溶着・切断の方法において、前
述した問題を解決するために、前記受治具には受治具の
回転軸に垂直な受治具垂直面を受治具の端面に設け、一
方、ホーン先端部には受治具外周面に対向して近接する
面をもつ外周面対向部と、前記受治具垂直面に接する平
行面をもつ垂直面対向部を設け、超音波振動停止時の外
周面対向部と受治具外周面との間隙は印加される超音波
振動の振幅の1/2より大きく、（従って、外周面対向部
は受治具外周面に接触しない）また、超音波振動の周期
の中で、前記受治具外周面と前記外周面対向部の最近接
時の間隙は、溶着されるシート１枚の厚さよりも小さく
なるように設定して行うシートの連続溶着・切断の方法
である。
〔作用〕
前述した方法では、超音波振動によるシートの溶着は
ホーン先端部の中の外周面対向部と受治具外周面からシ
ートに加えられる振動による発熱作用で生じ、一方、シ
ートの切断はホーン先端部の中の垂直面対向部と受治具
垂直面からシートに加えられる振動による発熱作用で溶
融することによって生ずる（溶断）。シートの溶着にお
いては、外周面対向部と受治具外周面は直接接触しない
ので、直接接触する場合に比べて、それらの磨耗は著し
く少ない。また、超音波振動の周期の中で、外周面対向
部と受治具外周面の最近接間隙は、溶着されるシート１
枚の厚さより小さいので、積層された２枚のシートのい
ずれもが必ず溶融する。シートの切断においては、垂直
面対向部と受治具垂直面は特に押圧される必要はないの
で、それらの磨耗は少ない。
〔実施例〕
本発明の実施例を第１図ないし第６図を参照して説明
する。
第１図は実施例を示した全体構成図である。２枚のシ
ート15a、15bは第１のガイドローラ13で積層された後
に、回転軸を有する円柱状の受治具12とその外周面すな
わち受治具外周面12aに対向して近接して設けたホーン
先端部11の間隙に導かれ、そこで溶着および切断が連続
的に行われ、切断された端切れ17は除かれ、端部を溶着
された積層シート16は第２のガイドローラ14を通して回
収される。ここで用いられるホーン先端部11と受治具外
周面12aの近傍の模式的な拡大正面図を第２図に示す。
また、第３図、第４図はその側面図であって、第３図は
シートの溶着、切断位置を模式的に示し（18は溶着部を
示す）、第４図では、超音波振動停止時の位置における
ホーン先端部11を実線で、また超音波振動（振幅Ｐ）印
加時の振動周期の中で最近接時および最遠離時における
ホーン先端部11の位置をいずれも破線で示している。第
１図ないし第３図で示されるように、受治具12は受治具
の回転軸に垂直な受治具垂直面12bを受治具の端面に有
し、一方、ホーン先端部11は、受治具外周面12aに対向
して近接する面をもつ外周面対向部11aと受治具垂直面1
2bに対向して接する平行面をもつ垂直面対向部11bを有
する。第２図には、ホーン先端部11と受治具22の間隙に
導かれようとしている積層された２枚のシート、15a、1
5bが模式的に示されている。ここでｔはシート１枚の厚
さを示す。
第４図で示すように、受治具外周面12aと外周面対向
部11aの間隙を、超音波振動停止時にはＳ、超音波振動
（振幅Ｐ）が印加されている時の最近接時にはＳ′（＝
Ｓ−1/2P）で表わすとすると、Ｓ＞P/2およびＳ′＝Ｓ
−1/2P＜ｔ、従ってP/2＜Ｓ＜ｔ＋P/2となるように設定
することにより、ホーン先端部および受治具の磨耗が著
しく少なく、しかも、安定した溶着強度と確実な切断を
連続的に行うことができる。
なお、本実施例では、受治具垂直面として、円柱状受
治具の端面を用いたが、第５図および第６図に示すよう
に、円柱状受治具の外周面に設けた段差部あるいは溝部
の垂直面を受治具垂直面として用いてもよい。
〔発明の効果〕
以上説明したように、本発明によれば、超音波振動を
用いるシートの連続溶着、切断の加工工程において、ホ
ーンおよび受治具の磨耗を少なくできるので、安定した
溶着強度および確実な切断が行えるようになる。
また、ホーンや受治具の調整や交換に要する時間を短
縮できるので、その経済的効果は大きい。
【図面の簡単な説明】
第１図ないし第６図は本発明の実施例の説明図で、第１
図は実施例の全体構成を示す斜視図、第２図は実施例の
要部（ホーンと受治具外周面近傍）の模式的正面図、第
３図は実施例におけるシートの溶着、切断位置を示す要
部の模式的拡大側面図、第４図はホーンと受治具外周面
の間隙を示す要部の模式的拡大側面図、第５図は段差部
ん受治具垂直面を用いる例、第６図は溝部の受治具垂直
面を用いる例である。 第７図ないし第11図は従来例の説明図で、第７図は従来
例の全体構成を示す斜視図、第８図は従来例の要部（ホ
ーンと受治具外周面近傍）の模式的拡大正面図、第９図
は従来例におけるシートの溶着、切断位置を示す要部の
模式的拡大側面図、第10図はホーンと受治具の外周面の
間隙を示す要部の模式的拡大側面図、第11図は他の従来
例における構成を示す要部の模式的拡大側面図である。 なお、図面に用いた符号において、 11……ホーン先端部 11a……外周面対向部 11b……垂直面対向部 12……受治具 12a……受治具外周面 12b……受治具垂直面 13……第１のガイドローラ 15a、ｂ……シート

Claims (2)

    (57)【特許請求の範囲】
  1. 【請求項１】回転軸を有する円柱状の受治具と、該受治
    具外周面に対向して近接して設けた超音波ホーンによ
    り、プラスチックの積層体を前記超音波ホーンの超音波
    振動により連続的に線状ないし帯状に溶着するととも
    に、その溶着部と平行して切断を行うプラスチックシー
    トの連続溶着・切断の方法において、前記受治具には少
    なくとも受治具の回転軸に略垂直な受治具垂直面を受治
    具の外周面に沿って設け、一方、超音波ホーンの先端部
    には、前記受治具外周面に対向して近接する面をもつ外
    周面対向部と前記受治具垂直面に対向して接する平行面
    をもつ垂直面対向部を設けることを特徴とするプラスチ
    ックシートの連続溶着・切断の方法。
  2. 【請求項２】超音波振動停止時の外周面対向部と受治具
    外周面との間隙は印加される超音波振動の振幅の1/2よ
    りも大きく、また印加される超音波振動の周期の中で、
    前記受治具外周面と前記外周面対向部の最近接時の間隙
    は溶着されるプラスチックシート１枚の厚さよりも小さ
    くなるように設定したことを特徴とする特許請求の範囲
    第１項記載のプラスチックシートの連続溶着・切断の方
    法。
JP2058029A 1990-03-12 1990-03-12 プラスチックシートの連続溶着・切断の方法 Expired - Fee Related JP2893808B2 (ja)

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JPH03261540A JPH03261540A (ja) 1991-11-21
JP2893808B2 true JP2893808B2 (ja) 1999-05-24

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4213748C2 (de) * 1992-04-25 1994-03-17 Beck & Co Packautomaten Vorrichtung zum kontinuierlichen Trennschweißen wenigstens zweier aufeinanderliegender Kunststoff-Folien
US6066226A (en) * 1994-08-03 2000-05-23 Mitsubishi Gas Chemical Company, Inc. Method of making a sheet-shaped oxygen absorber
JP2003200499A (ja) * 2002-01-07 2003-07-15 Showa Denko Plastic Products Co Ltd 脱水シートの製造方法、及び脱水シートの製造装置
TW200500193A (en) * 2003-04-18 2005-01-01 Ima Spa A sealing device for sealing and simultaneously cutting a web of material

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