JP6450310B2 - 超音波ホーン、これを備えた溶着機、及び超音波ホーンを用いた使い捨ておむつの製造方法 - Google Patents
超音波ホーン、これを備えた溶着機、及び超音波ホーンを用いた使い捨ておむつの製造方法 Download PDFInfo
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- JP6450310B2 JP6450310B2 JP2015522890A JP2015522890A JP6450310B2 JP 6450310 B2 JP6450310 B2 JP 6450310B2 JP 2015522890 A JP2015522890 A JP 2015522890A JP 2015522890 A JP2015522890 A JP 2015522890A JP 6450310 B2 JP6450310 B2 JP 6450310B2
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- ultrasonic
- welding
- ultrasonic horn
- output
- side end
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- B29C66/433—Casing-in, i.e. enclosing an element between two sheets by an outlined seam
-
- 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
- B29C66/70—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
- B29C66/72—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 structure of the material of the parts to be joined
- B29C66/729—Textile or other fibrous material made from plastics
- B29C66/7294—Non woven mats, e.g. felt
-
- 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
- B29C66/82—Pressure application arrangements, e.g. transmission or actuating mechanisms for joining tools or clamps
- B29C66/822—Transmission mechanisms
- B29C66/8226—Cam mechanisms; Wedges; Eccentric mechanisms
- B29C66/82263—Follower pin or roller cooperating with a groove
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/48—Wearing apparel
- B29L2031/4871—Underwear
- B29L2031/4878—Diapers, napkins
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- Life Sciences & Earth Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Manufacturing & Machinery (AREA)
- Epidemiology (AREA)
- Biomedical Technology (AREA)
- Vascular Medicine (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Botany (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Textile Engineering (AREA)
Description
搬送工程P1では、特定方向に延びるシートWをその長手方向に沿って搬送する。以下、シートWの流れ方向を横方向とし、図1において横方向と直交する方向を縦方向として説明する。
レッグホール形成工程P2では、シートWの縦方向の中央位置にレッグホールLを形成する。
吸収体接合工程P3では、シートWにおける2つのレッグホールLの間の位置に吸収体Aを接合する。
二つ折り工程P4では、吸収体Aが載置されたシートW(連続体)を縦方向に二つ折りにする。これにより、シートWにおける前腹部20aに相当する部分と後背部20bに相当する部分とが重ね合わされる。
溶着工程P5では、二つ折りにされたシートWにおける前腹部20aの側縁部に相当する部分と後背部20bの側縁部に相当する部分とを超音波溶着する。
切断工程P6では、溶着工程P5で形成された2つの溶着部Sの間で縦方向に延びる切断線に沿ってシートWを切断する。これにより、シートW(連続体)が使い捨ておむつ20ごとに切り分けられる。
Claims (6)
- 被溶着物を超音波溶着するために用いられる超音波ホーンであって、
超音波振動が入力される入力面を有する入力側端部と、
前記超音波振動の半波長に相当する距離だけ前記入力面から離間して配置されている
とともに前記被溶着物に超音波振動を出力する出力面を有する出力側端部とを備え、
前記出力側端部は、前記被溶着物を予め設定された方向に沿って溶着可能な長手方向の寸法を有するとともに、前記長手方向に延びるスリットにより長手方向と直交する幅方向に分岐し、
前記スリットの両側に位置する前記出力側端部の一対の端面は、前記出力面としてそれぞれ機能し、
前記スリットは、超音波振動の節部に相当する位置から前記出力側端部の端面までの範囲に形成されている、超音波ホーン。 - 前記超音波ホーンは、着用者の腹部に配置される前腹部と、着用者の臀部に配置される後背部と、前記前腹部から着用者の両脚部の間を通って前記後背部まで延びる股下部とを有する使い捨ておむつを製造するために、前記前腹部と前記後背部とが前記股下部を介して縦方向に連結された構成要素が横方向に連続する連続体を縦方向に二つ折りにした状態で、前記連続体における前記前腹部の側縁部に相当する部分と前記後背部の側縁部に相当する部分との重なり部分を超音波溶着するために用いられるものであり、
前記出力側端部は、前記前腹部の側縁部及び前記後背部の側縁部を縦方向に沿って溶着可能な長手方向の寸法を有し、
前記スリットの両側に位置する前記出力側端部の一対の端面は、縦方向に延びる切断線に沿って前記連続体を切断するための範囲として予め設定された切断範囲よりも大きい間隔で配置されている、請求項1に記載の超音波ホーン。 - 前記出力側端部は、前記前腹部の側縁部及び前記後背部の側縁部を縦方向の全範囲で溶着可能な長手方向の寸法を有する、請求項2に記載の超音波ホーン。
- 請求項1〜3の何れか1項に記載の超音波ホーンと、
前記超音波ホーンに入力される機械的な振動を発生させる超音波振動子とを備えている、超音波溶着機。 - 前記超音波振動子は、前記超音波ホーンの入力面に対して直接接続されている、請求項4に記載の超音波溶着機。
- 請求項2又は3に記載の超音波ホーンを用いて、着用者の腹部に配置される前腹部と、着用者の臀部に配置される後背部と、前記前腹部から着用者の両脚部の間を通って前記後背部まで延びる股下部とを有する使い捨ておむつを製造するための方法であって、
前記前腹部と前記後背部とが前記股下部を介して縦方向に連結された構成要素が横方向に連続する連続体を準備する準備工程と、
前記連続体を縦方向に二つ折りにする二つ折り工程と、
前記超音波ホーンの一対の出力面が前記連続体における前記前腹部の側縁部に相当する部分と前記後背部の側縁部に相当する部分との重なり部分に当接した状態で、前記超音波ホーンの入力面に超音波振動を入力することにより、前記連続体における2箇所を同時に溶着する溶着工程と、
前記溶着工程において形成された2箇所の溶着部の間で前記連続体を切断する切断工程とを含む、使い捨ておむつの製造方法。
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