JP2016169020A - Ultrasonic sealing device for paper container for liquid - Google Patents

Ultrasonic sealing device for paper container for liquid Download PDF

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Publication number
JP2016169020A
JP2016169020A JP2015049196A JP2015049196A JP2016169020A JP 2016169020 A JP2016169020 A JP 2016169020A JP 2015049196 A JP2015049196 A JP 2015049196A JP 2015049196 A JP2015049196 A JP 2015049196A JP 2016169020 A JP2016169020 A JP 2016169020A
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Japan
Prior art keywords
welding
anvil
horn
limit surface
upper limit
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Pending
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JP2015049196A
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Japanese (ja)
Inventor
智弥 佐藤
Tomoya Sato
智弥 佐藤
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Toppan Inc
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Toppan Printing Co Ltd
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Priority to JP2015049196A priority Critical patent/JP2016169020A/en
Publication of JP2016169020A publication Critical patent/JP2016169020A/en
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    • 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
    • B29C66/431—Joining the articles to themselves
    • B29C66/4312—Joining the articles to themselves for making flat seams in tubular or hollow articles, e.g. transversal seams
    • 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
    • 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
    • B29C65/745—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 a single unit having both a severing tool and a welding tool
    • B29C65/7451—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 a single unit having both a severing tool and a welding tool the severing tool and the welding tool being movable with respect to one-another
    • 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
    • B29C66/70—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
    • B29C66/723—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 being multi-layered
    • B29C66/7232—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 being multi-layered comprising a non-plastics layer
    • B29C66/72327—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 being multi-layered comprising a non-plastics layer consisting of natural products or their composites, not provided for in B29C66/72321 - B29C66/72324
    • B29C66/72328—Paper
    • 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
    • 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
    • B29C66/81415—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 bevelled
    • B29C66/81419—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 bevelled and flat
    • 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
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/849—Packaging machines
    • 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
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7162—Boxes, cartons, cases
    • B29L2031/7166—Cartons of the fruit juice or milk type, i.e. containers of polygonal cross sections formed by folding blanks into a tubular body with end-closing or contents-supporting elements, e.g. gable type containers

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Nonmetal Cutting Devices (AREA)
  • Package Closures (AREA)

Abstract

PROBLEM TO BE SOLVED: To provide an ultrasonic sealing device for a paper container for a liquid which inhibits the formation of a resin lump and allows a sealed state to be checked by visual inspection.SOLUTION: An ultrasonic sealing device for a paper container for a liquid performs sealing by using a horn 3 and an anvil 2. The anvil includes at least three step surfaces which are parallel to each other and have different heights. The step surfaces are connected by slope surfaces. The first step surface is a welding surface 10 located closest to the horn. The second step surface is a welding lower limit surface 11 capable of reliably providing a minimum sealing ability in a range where sufficient sealing ability is provided. The third step surface is a welding upper limit surface 12 where an approach to the horn beyond the surface has a possibility of causing excessive welding processing and resulting in a defect in sealing ability. With regard to distances from the horn, the welding surface, the welding lower limit surface and the welding upper limit surface are away therefrom in this order. Thus, there is provided the ultrasonic sealing device for a paper container for a liquid.SELECTED DRAWING: Figure 1

Description

本発明は、液体用紙容器の超音波シール装置に関する。特に、長尺の包材の幅方向の両端部を重ね合わせて筒状にした長尺の円筒包材の、重ね合わせにより出来た包材段差部を横断する方向に規則的な間隔でシールし、直方体形状に成形する液体用紙容器の超音波シール装置に関する。   The present invention relates to an ultrasonic sealing device for a liquid paper container. In particular, sealing is performed at regular intervals in a direction crossing the packaging material stepped portion of the long cylindrical packaging material obtained by overlapping both ends of the long packaging material in the width direction into a cylindrical shape. The present invention relates to an ultrasonic sealing device for a liquid paper container that is formed into a rectangular parallelepiped shape.

食品の液体内容物に使用される液体用紙容器は、果実飲料、お茶、コーヒー、乳飲料、スープ等の液体飲料、日本酒、焼酎等の酒類に広く用いられている。この液体用紙容器には、屋根型やレンガ型、あるいは円筒型などの形状の容器がある。   Liquid paper containers used for the liquid contents of foods are widely used for fruit drinks, tea, coffee, milk drinks, liquid drinks such as soups, and alcoholic beverages such as sake and shochu. Examples of the liquid paper container include a roof shape, a brick shape, and a cylindrical shape.

例えば、レンガ型液体用紙容器は、紙層の表裏に熱可塑性樹脂層を形成した包材の端部にエッジプロテクトテープを貼り、これを筒状に成形し包材端部どうしを重ねて貼ることで筒状形状にし、この筒状包材の下端部を横断方向にシールして筒の中に内容物を充填した状態でシールして仕切った後、立体形状に成形することで、内容物が充填された容器が製造される。包材としては、図５に例を示したような紙層３１の表裏面に外装側のポリエチレンフィルム層３０、ポリエチレン層３２、バリア層３３および内装側のポリエチレン層３４を形成したものが用いられる。   For example, in a brick-type liquid paper container, edge protection tape is applied to the edge of the packaging material with the thermoplastic resin layer formed on the front and back of the paper layer, this is molded into a cylindrical shape, and the packaging material edges are stacked on top of each other After forming into a cylindrical shape, sealing the lower end portion of this cylindrical packaging material in the transverse direction and sealing and partitioning in a state where the contents are filled in the cylinder, the contents are molded into a three-dimensional shape. Filled containers are manufactured. As the packaging material, a paper layer 31 having an exterior-side polyethylene film layer 30, a polyethylene layer 32, a barrier layer 33, and an interior-side polyethylene layer 34 formed on the front and back surfaces of a paper layer 31 as shown in FIG. 5 is used. .

横断方向へのシールは、図６に示したような超音波シール装置の超音波シールユニット１で、超音波発振器による電気エネルギーをコンバータ（圧電素子）により機械的な振動エネルギーに変換し、ホーン３（振動側）とアンビル２２（振動の受側）で２つのウェブ状の包材４を押圧しながら、包材界面で発生する熱により包材４の内装側ポリエチレンフィルム層３４（図５）を向い合わせにして溶融、接着したのち、２つのシール部６の中間で断裁刃５により断裁し、内容物が充填された液体用紙容器を切り離して完成する。この時、内容物を充填しながらのシールとなるため、液体用紙容器の確実なシール状態の確保が重要であり、内容物の保護、運搬・落下衝撃に耐えうる強度が必要とされる。   The transverse sealing is performed by the ultrasonic sealing unit 1 of the ultrasonic sealing apparatus as shown in FIG. 6. The electrical energy generated by the ultrasonic oscillator is converted into mechanical vibration energy by a converter (piezoelectric element). While pressing the two web-like packaging materials 4 with the vibration side and the anvil 22 (vibration receiving side), the interior side polyethylene film layer 34 (FIG. 5) of the packaging material 4 is heated by the heat generated at the packaging material interface. After facing and melting and adhering, cutting is performed by the cutting blade 5 in the middle of the two seal portions 6, and the liquid paper container filled with the contents is cut and completed. At this time, since the sealing is performed while filling the contents, it is important to ensure a reliable sealing state of the liquid paper container, and the contents are required to be protected and strong enough to withstand transportation / drop impact.

液体用紙容器のシール状態を確認するため、レンガ型液体用紙容器の生産工程においては、生産開始時および生産中に、一定の生産個数ごとにシール状態の確認が行われる。その確認は、引張り試験や漏れ試験などの破壊検査によって行われている。   In order to confirm the sealing state of the liquid paper container, in the production process of the brick-type liquid paper container, the sealing state is confirmed for every certain production number at the start of production and during production. The confirmation is performed by destructive inspections such as a tensile test and a leak test.

また、超音波シール装置で使用されるアンビル２２の包材をシールする部分の形状は、図７に示したような単純な平面からなるものなどが使用されていたが、シールによって溶融された熱可塑性樹脂による樹脂塊の発生を抑制するため、段差を持たせた形状や図８に示したような凹部７（窪み）を持たせた形状を有したものが使用されるようになった。   Further, the shape of the portion for sealing the packaging material of the anvil 22 used in the ultrasonic sealing device has a simple plane as shown in FIG. 7, but the heat melted by the seal is used. In order to suppress the generation of resin lumps due to the plastic resin, those having a stepped shape or a shape having a recess 7 (dent) as shown in FIG. 8 have been used.

例えば特許文献１には、超音波エネルギーをシールされる包材のシール部に伝えるホーンとアンビルの間にその包材を挟んでシールする際に、ホーンとアンビルの間の距離が狭い部分とそれより広い部分を隣接して設けることにより段差を形成し、包材のシール部にかかる圧力の強弱を作り出し、強い圧力がかかる部分では超音波エネルギーが十分に伝わる事で、包材の樹脂層が溶融して接着するが、弱い圧力の部分には十分な超音波エネルギーが加わらず、樹脂層が溶融せず流動しないため、食品容器となる側に樹脂塊が形成されない技術が開示されている。しかしながら、この技術では十分なシール状態が得られているかどうかを非破壊検査で確認することはできない。   For example, Patent Document 1 discloses that when a sealing material is sandwiched between a horn and an anvil that transmits ultrasonic energy to a sealing portion of the packaging material to be sealed, the distance between the horn and the anvil is narrow. By providing a wider part adjacent to each other, a step is formed, and the strength of the pressure applied to the sealing part of the packaging material is created, and in the part where the strong pressure is applied, the ultrasonic energy is sufficiently transmitted, so that the resin layer of the packaging material Although melted and bonded, sufficient ultrasonic energy is not applied to a weak pressure portion, and the resin layer does not melt and flow, and therefore a technique is disclosed in which a resin lump is not formed on the side that becomes a food container. However, this technique cannot confirm whether or not a sufficient seal state is obtained by nondestructive inspection.

また特許文献２には、食品容器となる側に樹脂塊が形成されないようにするために、ア
ンビル側に溶融した熱可塑性樹脂が溜まる凹部を形成し、食品容器となる側に流出した溶融した熱可塑性樹脂の厚みと幅を制御する技術が開示されている。 Further, in Patent Document 2, in order to prevent a resin lump from being formed on the side serving as a food container, a concave portion in which the molten thermoplastic resin is accumulated is formed on the anvil side, and the molten heat flowing out to the side serving as the food container is formed. A technique for controlling the thickness and width of a plastic resin is disclosed.

しかしながら、制御可能な溶融した樹脂量はアンビル形状に依存するため、溶融した樹脂量が過剰な場合には、樹脂塊が発生することが確認されている。また、この技術においても、十分なシール状態が得られているかどうかを非破壊検査で確認することはできず、従来と同様に、抜取りで破壊検査を行う必要がある。   However, since the controllable molten resin amount depends on the anvil shape, it has been confirmed that a resin lump is generated when the molten resin amount is excessive. Also in this technique, it is not possible to confirm whether a sufficient seal state is obtained by nondestructive inspection, and it is necessary to perform destructive inspection by sampling as in the prior art.

特許第４０９３７７５号公報Japanese Patent No. 4093775 特許第４２８２１７９号公報Japanese Patent No. 4282179

上記の問題点に鑑み、本発明は樹脂塊の発生を抑制し、且つ目視検査でシール状態が確認できる液体用紙容器の超音波シール装置を提供することを課題とする。   In view of the above problems, it is an object of the present invention to provide an ultrasonic sealing device for a liquid paper container that can suppress the generation of a resin lump and that can be visually checked for a sealing state.

上記の課題を解決する手段として、請求項１に記載の発明は、長尺の包材の幅方向の両端部を重ね合せてシールした長尺の筒状包材の重ね合わせにより出来た包材段差部分を横断する方向に、ホーンとアンビルによってシールする液体用紙容器の超音波シール装置であって、
アンビルは、少なくとも３つの互いに平行で異なる高さの段差面を有しており、
それらの段差面は斜面により連接されており、
１つ目の段差面はホーンに最も近い位置にある溶着面であり、２つ目の段差面は十分なシール性が得られる範囲の最低限のシール性が確保できる溶着下限面であり、３つ目の段差面はそれ以上ホーンに近づけると溶着処理が過剰となりシール性に不具合が生じる可能性がある溶着上限面であり、
ホーンからの距離は、溶着面、溶着下限面、溶着上限面の順に離れていることを特徴とする液体用紙容器の超音波シール装置である。 As means for solving the above-mentioned problem, the invention according to claim 1 is a packaging material formed by superposing long cylindrical packaging materials which are sealed by overlapping both ends in the width direction of the long packaging material. An ultrasonic sealing device for a liquid paper container that seals with a horn and an anvil in a direction crossing a stepped portion,
The anvil has at least three step surfaces parallel and different in height,
These step surfaces are connected by slopes,
The first step surface is a welding surface closest to the horn, and the second step surface is a welding lower limit surface that can secure a minimum sealing performance within a range where sufficient sealing performance can be obtained. The second step surface is a welding upper limit surface that may cause a problem in sealing performance due to excessive welding treatment if it is closer to the horn.
The distance from the horn is an ultrasonic sealing device for a liquid paper container, wherein the welding surface, the welding lower limit surface, and the welding upper limit surface are separated in this order.

また、請求項２に記載の発明は、長尺の包材の幅方向の両端部を重ね合せてシールした長尺の筒状包材の重ね合わせにより出来た包材段差部分を横断する方向に、ホーンとアンビルによってシールする液体用紙容器の超音波シール装置であって、
アンビルは、少なくとも３つの互いに平行で異なる高さの段差面を有しており、
それらの段差面は曲面により連接されているかまたは階段状に連接しており、
１つ目の段差面はホーンに最も近い位置にある溶着面であり、２つ目の段差面は十分なシール性が得られる範囲の最低限のシール性が確保できる溶着下限面であり、３つ目の段差面はそれ以上ホーンに近づけると溶着処理が過剰となりシール性に不具合が生じる可能性がある溶着上限面であり、
ホーンからの距離は、溶着面、溶着下限面、溶着上限面の順に離れていることを特徴とする液体用紙容器の超音波シール装置である。 Further, the invention according to claim 2 is directed in a direction that crosses the step portion of the packaging material made by superimposing the long cylindrical packaging material that is sealed by overlapping both ends of the long packaging material in the width direction. , An ultrasonic sealing device for a liquid paper container sealed by a horn and an anvil,
The anvil has at least three step surfaces parallel and different in height,
Those stepped surfaces are connected by curved surfaces or connected stepwise,
The first step surface is a welding surface closest to the horn, and the second step surface is a welding lower limit surface that can secure a minimum sealing performance within a range where sufficient sealing performance can be obtained. The second step surface is a welding upper limit surface that may cause a problem in sealing performance due to excessive welding treatment if it is closer to the horn.
The distance from the horn is an ultrasonic sealing device for a liquid paper container, wherein the welding surface, the welding lower limit surface, and the welding upper limit surface are separated in this order.

また、請求項３に記載の発明は、請求項１または２に記載の超音波シール装置で使用するアンビルであって、断裁刃側に溶着面に平行な面をさらに設けたことを特徴とする超音波シール装置で使用するアンビルである。   The invention described in claim 3 is an anvil used in the ultrasonic sealing device according to claim 1 or 2, further comprising a surface parallel to the welding surface on the cutting blade side. An anvil used in an ultrasonic sealing device.

本発明の超音波シール装置によれば、そのアンビル形状により樹脂塊の発生を抑制する
だけでなく、溶着部の包材の表面に発生するシール痕によって、外観検査によってシール状態を判定可能となる。また、シール状態の判定が非破壊の外観検査により可能となるため、生産効率が向上する。 According to the ultrasonic sealing device of the present invention, it is possible not only to suppress the generation of the resin lump by the anvil shape, but also to determine the seal state by visual inspection based on the seal mark generated on the surface of the packaging material of the welded portion. . Further, since the seal state can be determined by nondestructive appearance inspection, production efficiency is improved.

本発明の超音波シール装置の超音波シールユニットの一例を示す概略断面図であって、（ａ）はアンビルとホーンの配置関係、（ｂ）はアンビルの断面形状の例、をそれぞれ示している。It is a schematic sectional drawing which shows an example of the ultrasonic sealing unit of the ultrasonic sealing apparatus of this invention, Comprising: (a) has shown the arrangement | positioning relationship between an anvil and a horn, (b) has shown the example of the cross-sectional shape of an anvil, respectively. . 本発明の超音波シール装置の超音波シールユニットにおいて使用されるアンビルの形状の一例を示す概略断面図であって、（ａ）はアンビルとホーンの配置関係、（ｂ）は図１とは異なるアンビルの断面形状の例、をそれぞれ示している。It is a schematic sectional drawing which shows an example of the shape of the anvil used in the ultrasonic sealing unit of the ultrasonic sealing apparatus of this invention, (a) is arrangement | positioning relationship between an anvil and a horn, (b) is different from FIG. The example of the cross-sectional shape of an anvil is shown, respectively. 本発明の超音波シール装置の超音波シールユニットにおいて使用されるアンビルの形状であって、図１および図２とは異なる例を示す概略断面図である。It is a schematic sectional drawing which is an anvil shape used in the ultrasonic sealing unit of the ultrasonic sealing apparatus of this invention, Comprising: The example different from FIG. 1 and FIG. 2 is shown. 本発明の超音波シール装置によってシールされた液体用紙容器におけるシールに形成される断裁線の両側に形成されるシール痕の例を示す説明図であって、（ａ）はシール痕が２本でシール状態が弱い場合、（ｂ）はシール痕が３本でシール状態が適正な場合、（ｃ）はシール痕が４本でシール状態が強すぎる場合、をそれぞれ示すものである。It is explanatory drawing which shows the example of the seal | sticker trace formed on the both sides of the cutting line formed in the seal | sticker in the liquid paper container sealed by the ultrasonic sealing apparatus of this invention, (a) is two seal | sticker traces. When the sealing state is weak, (b) shows a case where there are three sealing marks and the sealing state is appropriate, and (c) shows a case where there are four sealing marks and the sealing state is too strong. 液体用紙容器に使用される包材の層構成の一例を示す概略断面図。The schematic sectional drawing which shows an example of the laminated constitution of the packaging material used for a liquid paper container. 従来の超音波シール装置の超音波シールユニットの一例を示す概略断面図。The schematic sectional drawing which shows an example of the ultrasonic sealing unit of the conventional ultrasonic sealing apparatus. 従来の超音波シール装置の超音波シールユニットのアンビルとホーンの配置関係と使用されているアンビルの断面形状の例を示した概略断面図。The schematic sectional drawing which showed the example of the cross-sectional shape of the anvil and horn arrangement | positioning of the ultrasonic seal unit of the conventional ultrasonic sealing apparatus, and the used anvil. 従来の超音波シール装置の超音波シールユニットのアンビルとホーンの配置関係と図７とは異なるアンビルの断面形状の例を示した概略断面図。The schematic sectional drawing which showed the example of the cross-sectional shape of the anvil different from FIG. 7 and the positional relationship of the anvil and horn of the ultrasonic sealing unit of the conventional ultrasonic sealing apparatus.

＜第一の実施形態＞
本発明の超音波シール装置の第一の実施形態は、長尺の包材の幅方向の両端部を重ね合せてシールした長尺の筒状包材の重ね合わせにより出来た包材段差部分を横断する方向に、ホーンとアンビルによってシールする液体用紙容器の超音波シール装置であって、そのアンビルは、少なくとも３つの互いに平行で異なる高さの段差面を有している。それらの段差面は斜面により連接されたものとなっており、１つ目の段差面はホーンに最も近い位置にある溶着面である。２つ目の段差面は十分なシール性が得られる範囲の最低限のシール性が確保できる溶着下限面である。３つ目の段差面はそれ以上ホーンに近づけると溶着処理が過剰となりシール性に不具合が生じる可能性がある溶着上限面である。また、ホーンからの距離は、溶着面、溶着下限面、溶着上限面の順に離れている。 <First embodiment>
In the first embodiment of the ultrasonic sealing device of the present invention, a packaging material step portion formed by superposing long tubular packaging materials which are sealed by overlapping both end portions in the width direction of a long packaging material is provided. An ultrasonic sealing device for a liquid paper container that seals in a transverse direction by a horn and an anvil, the anvil having at least three step surfaces that are parallel and different in height. These step surfaces are connected by slopes, and the first step surface is a welding surface closest to the horn. The second step surface is a welding lower limit surface that can ensure the minimum sealing performance within a range where sufficient sealing performance can be obtained. The third step surface is a welding upper limit surface that may cause a problem in sealing performance due to excessive welding when it is closer to the horn. Moreover, the distance from a horn is separated in the order of the welding surface, the welding lower limit surface, and the welding upper limit surface.

次に、本発明の超音波シール装置の第一の実施形態を、図面を用いて詳細に説明する。
図１は、本発明の超音波シール装置の超音波シールユニットの一例を示す概略断面図であって、（ａ）はアンビルとホーンの配置関係、（ｂ）はアンビルの断面形状の例、をそれぞれ示している。 Next, a first embodiment of the ultrasonic sealing device of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic cross-sectional view showing an example of an ultrasonic seal unit of the ultrasonic seal device of the present invention, where (a) is an arrangement relation between an anvil and a horn, and (b) is an example of a cross-sectional shape of an anvil. Each is shown.

図１（ａ）は、図示していない超音波源から発せられる超音波がホーン３に伝達され、図示されていない１組の包材が互いに溶着面を向い合せにされて、アンビル２を受け台としてホーン３によって押圧され（図６参照）、超音波エネルギーによって加熱されることによって包材の溶着面の熱可塑性樹脂が溶融し、接着する。   In FIG. 1A, an ultrasonic wave emitted from an ultrasonic source (not shown) is transmitted to the horn 3, and a set of packaging materials (not shown) face the welding surface to receive the anvil 2. When pressed by the horn 3 as a table (see FIG. 6) and heated by ultrasonic energy, the thermoplastic resin on the welding surface of the packaging material is melted and bonded.

その際に、包材はホーン３によってアンビル２に押圧されているため、まず溶着面１０が包材に押し込まれる。この時点で、図４（ａ）に示したような２本のシール痕２０が、液体紙容器のシール部の断裁線２１の両側に形成される。この状態では、まだシール状態はまだ十分な状態とは言えないことを示している。   At that time, since the packaging material is pressed against the anvil 2 by the horn 3, the welding surface 10 is first pushed into the packaging material. At this time, two seal marks 20 as shown in FIG. 4A are formed on both sides of the cutting line 21 of the seal portion of the liquid paper container. In this state, the sealed state is not yet satisfactory.

更に溶着下限面１１にまで押し込まれることによって、図４（ｂ）に示したように３本のシール痕２０１が、液体紙容器のシール部の断裁線２１の両側に形成される。溶着下限面１１は、十分なシール強度が得られ始める位置に配置されている。従って、３本のシール痕２０１が観察できる場合は、十分なシール性が得られていることを示している。   Further, by pushing down to the welding lower limit surface 11, as shown in FIG. 4B, three seal marks 201 are formed on both sides of the cutting line 21 of the seal portion of the liquid paper container. The welding lower limit surface 11 is disposed at a position where sufficient seal strength starts to be obtained. Therefore, when the three seal marks 201 can be observed, it indicates that sufficient sealing performance is obtained.

更に溶着上限面１２にまで押し込まれることによって、図４（ｃ）に示したように４本のシール痕２０２が、液体紙容器のシール部の断裁線２１の両側に形成される。溶着上限面１２は、これ以上押し込むと、シール部にダメージが生じ、シール性が損なわれ始める位置に配置されている。そのため、４本のシール痕２０２が観察された場合は、シール性が十分ではないことを示している。   Further, by pushing down to the welding upper limit surface 12, as shown in FIG. 4C, four seal marks 202 are formed on both sides of the cutting line 21 of the seal portion of the liquid paper container. When the welding upper limit surface 12 is pushed further, the seal portion is damaged, and the welding upper limit surface 12 is disposed at a position where the sealing performance starts to be impaired. Therefore, when four seal marks 202 are observed, it indicates that the sealing performance is not sufficient.

ここで、シール痕２０、２０１、２０２が発生する部位について説明する。
まず、図１（ｂ）に示すアンビル２について説明する。溶着面１０については、アンビル２が長手方向（図１（ｂ）において、紙面に直交する方向）に延在するアンビル２の両端部に一対のシール痕２０が形成される。 Here, the site | part which the seal | sticker marks 20, 201, 202 generate | occur | produce is demonstrated.
First, the anvil 2 shown in FIG. For the welding surface 10, a pair of seal marks 20 are formed at both ends of the anvil 2 in which the anvil 2 extends in the longitudinal direction (the direction orthogonal to the paper surface in FIG. 1B).

次に、アンビル２が包材に押し込まれると、溶着下限面１１に当接する。その時、溶着上限面１２に至る側の溶着下限面１１の端部にてシール痕２０１が形成される。   Next, when the anvil 2 is pushed into the packaging material, it comes into contact with the welding lower limit surface 11. At that time, a seal mark 201 is formed at the end of the welding lower limit surface 11 on the side reaching the welding upper limit surface 12.

次に、更にアンビル２が包材に押し込まれると、溶着上限面１２に当接する。その時、溶着上限面１２から更にアンビル２の外側の斜面側の溶着上限面１２の端部にシール痕２０２が形成される。   Next, when the anvil 2 is further pushed into the packaging material, it contacts the welding upper limit surface 12. At that time, a seal mark 202 is formed at the end of the welding upper limit surface 12 on the slope side outside the anvil 2 further from the welding upper limit surface 12.

次に、図３に示すアンビル２について説明する。包材がホーン３に押圧されることによって、アンビル２の溶着面１０、溶着下限面１１、溶着上限面１２が包材に当接する順序は変わらないが、図３のアンビル２では、図１（ｂ）における溶着面１０と溶着下限面１１の位置が入れ替わり、溶着下限面１１が断裁刃５側に配置されている。そのため、まず溶着面１０の両端部に２本のシール痕が形成される。その次に、溶着下限面１１の断裁刃５側の端部に１本のシール痕が形成される。更にアンビル２が包材に押し込まれると、溶着上限面１２から更にアンビル２の外側の斜面側の溶着上限面１２の端部に１本のシール痕が形成される。このように図１（ｂ）のアンビル２においても図３のアンビル２においても、観察されるシール痕の本数とシール性の関係は変わらない。   Next, the anvil 2 shown in FIG. 3 will be described. When the packaging material is pressed against the horn 3, the order in which the welding surface 10, the welding lower limit surface 11, and the welding upper limit surface 12 of the anvil 2 abut on the packaging material does not change, but in the anvil 2 of FIG. The positions of the welding surface 10 and the welding lower limit surface 11 in b) are interchanged, and the welding lower limit surface 11 is arranged on the cutting blade 5 side. Therefore, first, two seal marks are formed at both ends of the welding surface 10. Next, one seal mark is formed at the end of the welding lower limit surface 11 on the cutting blade 5 side. Further, when the anvil 2 is pushed into the packaging material, one seal mark is formed at the end of the welding upper limit surface 12 on the slope side outside the anvil 2 from the welding upper limit surface 12. As described above, the relationship between the number of observed seal marks and the sealing property is the same in both the anvil 2 in FIG. 1B and the anvil 2 in FIG. 3.

一方、図２（ｂ）のアンビル２は、図１（ｂ）のアンビル２において、溶着面１０の断裁刃５側に、更に外側段差１３を設けた構成である。この場合も、観察されるシール痕の本数とシール性の関係は変わらず、アンビル２が包材に押し込まれるに連れて、２本のシール痕が観察できる場合は、十分なシール性が得られることを示しており、３本のシール痕が観察できる場合は、十分なシール性が得られていることを示している。また、４本のシール痕が観察された場合は、押し込みが過剰となり、シール部にダメージが生じてしまうことから、シール性が十分ではないことを示している。なお、外側段差１３を設けた構成の場合において、前記外側段差１３由来のシール痕については、シール性判定時の本数カウントには含める必要がない。これは、前記外側段差１３は、シール部の断裁刃側（製品においては、断裁線側）における樹脂塊の形成を抑制することが主目的であり、液体用容器のシール性自体には影響を及ぼさないためである。   On the other hand, the anvil 2 in FIG. 2B has a configuration in which an outer step 13 is further provided on the cutting blade 5 side of the welding surface 10 in the anvil 2 in FIG. Also in this case, the relationship between the number of seal marks to be observed and the sealability does not change, and if the two seal marks can be observed as the anvil 2 is pushed into the packaging material, sufficient sealability can be obtained. When three seal marks can be observed, it indicates that sufficient sealability is obtained. Moreover, when four seal | sticker marks are observed, since pushing will become excessive and a seal part will be damaged, it has shown that sealing performance is not enough. In the case of the configuration in which the outer step 13 is provided, the seal mark derived from the outer step 13 does not need to be included in the number count at the time of sealing performance determination. The main purpose of the outer step 13 is to suppress the formation of a resin lump on the cutting blade side (in the product, the cutting line side) of the seal portion, which has an influence on the sealing performance itself of the liquid container. It is because it does not reach.

また、図１（ｂ）のアンビルの場合、シール部の液体用容器側に、樹脂塊の形成が抑制されていることが確認できた。シール部の断裁刃側（製品においては、断裁線側）では樹脂塊の形成が抑制されていないため、外観的に確認することができた。一方、図２（ｂ）と図３のアンビルの場合、シール部の液体用容器側と断裁刃側で樹脂塊の形成が抑制され
ている事が分った。このように、断裁刃側においても溶着面と平行な面を設けることによって樹脂塊の発生を抑制することが可能である。 Moreover, in the case of the anvil of FIG.1 (b), it has confirmed that formation of the resin lump was suppressed by the liquid container side of a seal part. Since the formation of the resin lump was not suppressed on the cutting blade side of the seal part (the cutting line side in the product), the appearance could be confirmed. On the other hand, in the case of the anvil shown in FIGS. 2B and 3, it was found that the formation of the resin mass was suppressed on the liquid container side and the cutting blade side of the seal portion. Thus, it is possible to suppress the generation of a resin lump by providing a surface parallel to the welding surface on the cutting blade side.

また、溶着上限面１２の高さをＡ、溶着上限面１２と溶着面１０の距離をａとすると、溶着下限面１１の高さＢが、（Ａ＋ａ／４）＜Ｂ＜（Ａ＋ａ／２）なる条件を満たせば、十分なシール性が得られている場合に観察されるシール痕の本数は３本になる。   Further, when the height of the welding upper limit surface 12 is A and the distance between the welding upper limit surface 12 and the welding surface 10 is a, the height B of the welding lower limit surface 11 is (A + a / 4) <B <(A + a / 2). If this condition is satisfied, the number of seal marks observed when sufficient sealability is obtained is three.

＜第二の実施形態＞
本発明の第一の実施形態においては、互いに平行で異なる高さの段差面である、溶着面と溶着下限面と溶着上限面を連接するのは平面である斜面であった。本発明の第二の実施形態においては、溶着面と溶着下限面と溶着上限面を連接するのは、曲面によって連接されているか、または階段状に連接している。 <Second Embodiment>
In the first embodiment of the present invention, the welding surface, the welding lower limit surface, and the welding upper limit surface, which are step surfaces parallel and different in height, are slopes that are flat surfaces. In the second embodiment of the present invention, the welding surface, the welding lower limit surface, and the welding upper limit surface are connected by a curved surface or connected stepwise.

このように、溶着面と溶着下限面と溶着上限面を連接する状態がいかなるものであっても、ホーンと溶着面、溶着下限面、溶着上限面の距離関係が、第一の実施形態において説明した関係であることにより、観察されるシール痕の本数とシール性の関係は変わらない。またシール部の液体用容器側と断裁刃側での樹脂塊の形成の状態についても、第一の実施形態と同じであった。   As described above, the distance relationship between the horn, the welding surface, the welding lower limit surface, and the welding upper limit surface is explained in the first embodiment regardless of the state in which the welding surface, the welding lower limit surface, and the welding upper limit surface are connected. Therefore, the relationship between the number of observed seal marks and the sealing property does not change. Moreover, the state of the resin lump formation on the liquid container side and the cutting blade side of the seal portion was also the same as in the first embodiment.

以上に説明した通り、本発明の超音波シールユニットを備えた超音波シール装置によって、ホーンとアンビルに備えられた溶着面と溶着下限面と溶着上限面により、樹脂塊の発生を抑制するだけでなく、シール部の包材の表面に発生するシール痕によって、外観検査によってシール状態を判定可能となる。また、シール状態の判定が非破壊の外観検査により可能となるため、生産効率が向上する。   As described above, the ultrasonic sealing device provided with the ultrasonic sealing unit of the present invention only suppresses the generation of the resin mass by the welding surface, the welding lower limit surface, and the welding upper limit surface provided in the horn and the anvil. The seal state can be determined by appearance inspection based on the seal mark generated on the surface of the packaging material of the seal portion. Further, since the seal state can be determined by nondestructive appearance inspection, production efficiency is improved.

上記の実施形態１および２の説明では、アンビルが３つの段差面である溶着面、溶着下限面および溶着上限面を備えている場合を説明したが、３つの段差面に限定する必要は無く、４つ以上の平行な段差面を備えたアンビルを使用することにより、更に細かいシール状態を、シール痕を観察することによって、把握することが可能となる。   In the description of the first and second embodiments, the case where the anvil is provided with the welding surface that is the three step surfaces, the welding lower limit surface, and the welding upper limit surface is not necessarily limited to the three step surfaces. By using an anvil having four or more parallel step surfaces, it becomes possible to grasp a finer seal state by observing the seal mark.

次に実施例を用いて本発明の超音波シール装置を説明する。
＜実施例１＞
（包材）
使用した包材は、図５に示した層構成を持つものを使用した。内装側ポリエチレンフィルム層３４の厚さは５０μｍのポリエチレンフィルム、バリア層３３には厚さ１５μｍのＰＥＴ（ポリエチレンテレフタレート）フィルムに酸化シリコン（ＳｉＯ２）薄膜を真空蒸着にて５０ｎｍの厚さで形成したもの、ポリエチレンフィルム層３２には厚さ１５μｍのポリエチレンフィルム、紙層３１には厚さ２５０μｍの液体紙容器用の紙（Ｎコート、カップ原紙、坪量２１５ｇ／ｍ２、日本製紙社製）、外装側のポリエチレンフィルム層３０には厚さ１５μｍのポリエチレンフィルム、を使用した積層体を使用した。 Next, the ultrasonic sealing apparatus of the present invention will be described using examples.
<Example 1>
(Wrapping material)
The packaging material used has the layer structure shown in FIG. The interior-side polyethylene film layer 34 has a thickness of 50 μm, the barrier layer 33 has a 15 μm-thick PET (polyethylene terephthalate) film, and a silicon oxide (SiO 2 ) thin film formed by vacuum deposition to a thickness of 50 nm. The polyethylene film layer 32 has a 15 μm thick polyethylene film, the paper layer 31 has a 250 μm thick paper for liquid paper containers (N coat, cup base paper, basis weight 215 g / m 2, manufactured by Nippon Paper Industries Co., Ltd.), exterior For the polyethylene film layer 30 on the side, a laminate using a polyethylene film having a thickness of 15 μm was used.

（超音波シールユニット）
図６に示した構成の超音波シールユニット１を使用し、上記に説明した包材の内装側ポリエチレンフィルム層３４を互いに向かい合わせにして図６に示したように超音波シールユニット１に装着して、レンガ型液体用紙容器を作製した。
超音波シールユニット１は、ホーン側とアンビル側とからなり、断裁刃５をアンビル２側に備えている（図１（ａ））。アンビル２は上下対称な一対のシールバーから構成されている。それぞれのシールバーが液体用紙容器となるシール部の上部と下部を溶着させた後、断裁刃５によってそのシール部の中央を分断される。 (Ultrasonic seal unit)
The ultrasonic seal unit 1 having the configuration shown in FIG. 6 is used, and the interior-side polyethylene film layer 34 of the packaging material described above is mounted on the ultrasonic seal unit 1 as shown in FIG. A brick-type liquid paper container was prepared.
The ultrasonic seal unit 1 includes a horn side and an anvil side, and includes a cutting blade 5 on the anvil 2 side (FIG. 1A). The anvil 2 is composed of a pair of vertically symmetrical seal bars. Each seal bar welds the upper and lower portions of the seal portion serving as a liquid paper container, and then the center of the seal portion is cut by the cutting blade 5.

（アンビル）
本実施例で使用したアンビルは、図１（ｂ）に示した断面形状を有するものを使用した。具体的には、溶着面１０とその溶着面１０に平行な溶着下限面１１と溶着上限面１２を、断裁刃５側から外側に向って、溶着面１０、溶着下限面１１、溶着上限面１２の順に備えている。溶着下限面１１は溶着面１０の面より１５０μｍだけホーン３（図１（ａ））から離れている。溶着上限面１２は着面１０の面より２００μｍだけホーン３（図１（ａ））から離れている。また、アンビル２を構成する上下のシールバーの溶着面１０の幅は、１ｍｍ、溶着下限面１１の幅は０．３ｍｍ、溶着上限面１２の幅は０．６ｍｍとし、それぞれの平面となす角度が４５度の斜面により連接されたものを使用した。 (Anvil)
As the anvil used in this example, the anvil having the cross-sectional shape shown in FIG. Specifically, the welding surface 10, the welding lower limit surface 11 and the welding upper limit surface 12 parallel to the welding surface 10 are directed outward from the cutting blade 5 side, and the welding surface 10, the welding lower limit surface 11, and the welding upper limit surface 12. In order. The welding lower limit surface 11 is separated from the horn 3 (FIG. 1A) by 150 μm from the surface of the welding surface 10. The welding upper limit surface 12 is separated from the horn 3 (FIG. 1A) by 200 μm from the surface of the deposition surface 10. Further, the width of the welding surface 10 of the upper and lower seal bars constituting the anvil 2 is 1 mm, the width of the welding lower limit surface 11 is 0.3 mm, and the width of the welding upper limit surface 12 is 0.6 mm. Were connected by a slope of 45 degrees.

上記の包材、超音波シールユニット、アンビルを使用して、包材のシールを実施した結果、シール痕が図４に示した様に、３本の場合は適正なシールとなり、２本の場合はシール不足による強度不足、および４本の場合はシール過剰による包材ダメージなどにより、十分なシール性を得ることができなかった。   As a result of the sealing of the packaging material using the above packaging material, ultrasonic seal unit, and anvil, as shown in FIG. No sufficient sealability could be obtained due to insufficient strength due to insufficient sealing and, in the case of four, due to packaging damage due to excessive sealing.

＜実施例２＞
本実施例で使用したアンビルは、図２（ｂ）に示した断面形状を有するものを使用した以外は、実施例１と同じとした。具体的には、溶着面１０とその溶着面１０に平行な溶着下限面１１と溶着上限面１２を、断裁刃５側から外側に向って、溶着面１０、溶着下限面１１、溶着上限面１２の順に備えている。一番断裁刃側にある面は、外側段差１３である。溶着下限面１１は溶着面１０の面より１５０μｍだけ低い。溶着上限面１２は溶着面１０の面より２００μｍだけ低い。また、アンビル２を構成する上下のシールバーの溶着面１０の幅は、１ｍｍ、溶着下限面１１の幅は３００μｍ、溶着上限面１２の幅は６００μｍとし、それぞれの平面となす角度が４５度の斜面により連接されたものを使用した。外側段差１３は溶着面１０の面より３００μｍ低く、その幅は３００μｍとした。 <Example 2>
The anvil used in this example was the same as Example 1 except that the anvil having the cross-sectional shape shown in FIG. Specifically, the welding surface 10, the welding lower limit surface 11 and the welding upper limit surface 12 parallel to the welding surface 10 are directed outward from the cutting blade 5 side, and the welding surface 10, the welding lower limit surface 11, and the welding upper limit surface 12. In order. The surface on the most cutting blade side is the outer step 13. The welding lower limit surface 11 is lower than the surface of the welding surface 10 by 150 μm. The welding upper limit surface 12 is lower than the surface of the welding surface 10 by 200 μm. Further, the width of the welding surface 10 of the upper and lower seal bars constituting the anvil 2 is 1 mm, the width of the welding lower limit surface 11 is 300 μm, the width of the welding upper limit surface 12 is 600 μm, and the angle between each plane is 45 degrees. What was connected by the slope was used. The outer step 13 is 300 μm lower than the surface of the welding surface 10 and its width is 300 μm.

上記の包材、超音波シールユニット、アンビルを使用して、包材のシールを実施した結果、３本の場合は適正なシールとなり、２本の場合はシール不足による強度不足、および４本又は５本の場合はシール過剰による包材ダメージなどにより、十分なシール性を得ることができなかった。   As a result of carrying out the sealing of the packaging material using the above-mentioned packaging material, ultrasonic seal unit, and anvil, in the case of three, it becomes an appropriate seal, and in the case of two, the strength is insufficient due to insufficient sealing, and four or In the case of five, sufficient sealing performance could not be obtained due to packaging damage due to excessive sealing.

＜実施例３＞
本実施例で使用したアンビルは、図３に示した断面形状を有するものを使用した以外は、実施例１と同じとした。具体的には、溶着面１０とその溶着面１０に平行な溶着下限面１１と溶着上限面１２を、断裁刃５側から外側に向って、溶着下限面１１、溶着面１０、溶着上限面１２の順に備えている。溶着下限面１１は溶着面１０の面より１５０μｍだけ溶着面１０より低い。溶着上限面１２は溶着面１０の面より２００μｍだけ低い。また、アンビル２を構成する上下のシールバーの溶着面１０の幅は、１ｍｍ、溶着下限面１１の幅は３００μｍ、溶着上限面１２の幅は６００μｍとし、それぞれの平面となす角度が４５度の斜面により連接されたものを使用した。 <Example 3>
The anvil used in this example was the same as Example 1 except that the anvil having the cross-sectional shape shown in FIG. 3 was used. Specifically, the welding lower limit surface 11, the welding surface 10, and the welding upper limit surface 12 are formed such that the welding surface 10, the welding lower limit surface 11 and the welding upper limit surface 12 parallel to the welding surface 10 are directed outward from the cutting blade 5 side. In order. The welding lower limit surface 11 is lower than the welding surface 10 by 150 μm from the surface of the welding surface 10. The welding upper limit surface 12 is lower than the surface of the welding surface 10 by 200 μm. Further, the width of the welding surface 10 of the upper and lower seal bars constituting the anvil 2 is 1 mm, the width of the welding lower limit surface 11 is 300 μm, the width of the welding upper limit surface 12 is 600 μm, and the angle between each plane is 45 degrees. What was connected by the slope was used.

上記の包材、超音波シールユニット、アンビルを使用して、包材のシールを実施した結果、シール痕が図４に示した様に、３本の場合は適正なシールとなり、２本の場合はシール不足による強度不足、および４本の場合はシール過剰による包材ダメージなどにより、十分なシール性を得ることができなかった。   As a result of the sealing of the packaging material using the above packaging material, ultrasonic seal unit, and anvil, as shown in FIG. No sufficient sealability could be obtained due to insufficient strength due to insufficient sealing and, in the case of four, due to packaging damage due to excessive sealing.

１・・・超音波シールユニット
２、２２・・・アンビル
３・・・ホーン
４・・・包材
５・・・断裁刃
６・・・シール部
７・・・凹部
１０・・・溶着面
１１・・・溶着下限面
１２・・・溶着上限面
１３・・・外側段差
２０、２０１、２０２・・・シール痕
２１・・・断裁線
３０・・・外装側のポリエチレンフィルム層
３１・・・紙層
３２・・・ポリエチレンフィルム層
３３・・・バリア層
３４・・・内装側ポリエチレンフィルム層 DESCRIPTION OF SYMBOLS 1 ... Ultrasonic sealing unit 2, 22 ... Anvil 3 ... Horn 4 ... Packaging material 5 ... Cutting blade 6 ... Seal part 7 ... Recessed part 10 ... Welding surface 11 ... welding lower limit surface 12 ... welding upper limit surface 13 ... outer step 20, 201, 202 ... seal mark 21 ... cutting line 30 ... exterior side polyethylene film layer 31 ... paper Layer 32 ... polyethylene film layer 33 ... barrier layer 34 ... interior side polyethylene film layer

Claims (3)

長尺の包材の幅方向の両端部を重ね合せてシールした長尺の筒状包材の重ね合わせにより出来た包材段差部分を横断する方向に、ホーンとアンビルによってシールする液体用紙容器の超音波シール装置であって、
アンビルは、少なくとも３つの互いに平行で異なる高さの段差面を有しており、
それらの段差面は斜面により連接されており、
１つ目の段差面はホーンに最も近い位置にある溶着面であり、２つ目の段差面は十分なシール性が得られる範囲の最低限のシール性が確保できる溶着下限面であり、３つ目の段差面はそれ以上ホーンに近づけると溶着処理が過剰となりシール性に不具合が生じる可能性がある溶着上限面であり、
ホーンからの距離は、溶着面、溶着下限面、溶着上限面の順に離れていることを特徴とする液体用紙容器の超音波シール装置。 A liquid paper container that is sealed with a horn and an anvil in a direction that crosses a step portion of the packaging material formed by superimposing the long cylindrical packaging materials that are overlapped and sealed at both ends in the width direction of the long packaging material. An ultrasonic sealing device,
The anvil has at least three step surfaces parallel and different in height,
These step surfaces are connected by slopes,
The first step surface is a welding surface closest to the horn, and the second step surface is a welding lower limit surface that can secure a minimum sealing performance within a range where sufficient sealing performance can be obtained. The second step surface is a welding upper limit surface that may cause a problem in sealing performance due to excessive welding treatment if it is closer to the horn.
The ultrasonic sealing device for a liquid paper container, wherein the distance from the horn is separated in the order of a welding surface, a welding lower limit surface, and a welding upper limit surface. 長尺の包材の幅方向の両端部を重ね合せてシールした長尺の筒状包材の重ね合わせにより出来た包材段差部分を横断する方向に、ホーンとアンビルによってシールする液体用紙容器の超音波シール装置であって、
アンビルは、少なくとも３つの互いに平行で異なる高さの段差面を有しており、
それらの段差面は曲面により連接されているかまたは階段状に連接しており、
１つ目の段差面はホーンに最も近い位置にある溶着面であり、２つ目の段差面は十分なシール性が得られる範囲の最低限のシール性が確保できる溶着下限面であり、３つ目の段差面はそれ以上ホーンに近づけると溶着処理が過剰となりシール性に不具合が生じる可能性がある溶着上限面であり、
ホーンからの距離は、溶着面、溶着下限面、溶着上限面の順に離れていることを特徴とする液体用紙容器の超音波シール装置。 A liquid paper container that is sealed with a horn and an anvil in a direction that crosses a step portion of the packaging material formed by superimposing the long cylindrical packaging materials that are overlapped and sealed at both ends in the width direction of the long packaging material. An ultrasonic sealing device,
The anvil has at least three step surfaces parallel and different in height,
Those stepped surfaces are connected by curved surfaces or connected stepwise,
The first step surface is a welding surface closest to the horn, and the second step surface is a welding lower limit surface that can secure a minimum sealing performance within a range where sufficient sealing performance can be obtained. The second step surface is a welding upper limit surface that may cause a problem in sealing performance due to excessive welding treatment if it is closer to the horn.
The ultrasonic sealing device for a liquid paper container, wherein the distance from the horn is separated in the order of a welding surface, a welding lower limit surface, and a welding upper limit surface. 請求項１または２に記載の超音波シール装置で使用するアンビルであって、断裁刃側に溶着面に平行な面をさらに設けたことを特徴とする超音波シール装置で使用するアンビル。   The anvil used in the ultrasonic sealing device according to claim 1 or 2, further comprising a surface parallel to the welding surface on the cutting blade side.
JP2015049196A 2015-03-12 2015-03-12 Ultrasonic sealing device for paper container for liquid Pending JP2016169020A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023061803A1 (en) * 2021-10-14 2023-04-20 Herrmann Ultraschalltechnik Gmbh & Co. Kg Tool for an ultrasonic welding device and associated method
US20230227194A1 (en) * 2020-07-08 2023-07-20 Tetra Laval Holdings & Finance S.A. An inductor for transversal sealing, a packaging machine comprising the inductor for transversal sealing and a method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20230227194A1 (en) * 2020-07-08 2023-07-20 Tetra Laval Holdings & Finance S.A. An inductor for transversal sealing, a packaging machine comprising the inductor for transversal sealing and a method thereof
WO2023061803A1 (en) * 2021-10-14 2023-04-20 Herrmann Ultraschalltechnik Gmbh & Co. Kg Tool for an ultrasonic welding device and associated method

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