JP2001354257A - Pour-out port of container - Google Patents
Pour-out port of containerInfo
- Publication number
- JP2001354257A JP2001354257A JP2000174811A JP2000174811A JP2001354257A JP 2001354257 A JP2001354257 A JP 2001354257A JP 2000174811 A JP2000174811 A JP 2000174811A JP 2000174811 A JP2000174811 A JP 2000174811A JP 2001354257 A JP2001354257 A JP 2001354257A
- Authority
- JP
- Japan
- Prior art keywords
- container
- score
- spout
- opening
- fissure
- 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.)
- Granted
Links
- 229920005989 resin Polymers 0.000 claims abstract description 30
- 239000011347 resin Substances 0.000 claims abstract description 30
- 239000011888 foil Substances 0.000 claims abstract description 26
- 238000000465 moulding Methods 0.000 claims abstract description 13
- 229920003002 synthetic resin Polymers 0.000 claims abstract description 8
- 239000000057 synthetic resin Substances 0.000 claims abstract description 8
- 229910052751 metal Inorganic materials 0.000 claims description 22
- 239000002184 metal Substances 0.000 claims description 22
- 230000004888 barrier function Effects 0.000 abstract description 23
- 238000003466 welding Methods 0.000 abstract description 12
- 239000004698 Polyethylene Substances 0.000 description 9
- -1 polyethylene Polymers 0.000 description 9
- 229920000573 polyethylene Polymers 0.000 description 9
- 229910052782 aluminium Inorganic materials 0.000 description 8
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 8
- 238000002347 injection Methods 0.000 description 7
- 239000007924 injection Substances 0.000 description 7
- 239000000123 paper Substances 0.000 description 7
- 230000000052 comparative effect Effects 0.000 description 5
- 239000007788 liquid Substances 0.000 description 4
- 238000010030 laminating Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229920000642 polymer Polymers 0.000 description 2
- 229940037003 alum Drugs 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/40—Removing or ejecting moulded articles
- B29C45/44—Removing or ejecting moulded articles for undercut articles
- B29C45/4407—Removing or ejecting moulded articles for undercut articles by flexible movement of undercut portions of the articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/14—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles
- B29C45/14778—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor incorporating preformed parts or layers, e.g. injection moulding around inserts or for coating articles the article consisting of a material with particular properties, e.g. porous, brittle
-
- 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
- B29L2031/56—Stoppers or lids for bottles, jars, or the like, e.g. closures
- B29L2031/565—Stoppers or lids for bottles, jars, or the like, e.g. closures for containers
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Cartons (AREA)
- Closures For Containers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、紙製複合シート
等の液体容器の開口部に内側から差し込んで超音波溶着
によって取付けられ、使用時には、裂取部材を引張っ
て、封止用の口壁を開封させる容器の注出口に関するも
のである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid container, such as a paper composite sheet, which is inserted from the inside and attached by ultrasonic welding, and in use, a tearing member is pulled to form a sealing mouth wall. It relates to the spout of the container to be opened.
【０００２】[0002]
【従来の技術】図９，１０は、例えば、実開平２−１２
９０２４号公報に記載された容器の注出口に関するもの
である。（第一従来例） すなわち、これは、ガスバリヤー性フイルム５１が、中
心部より射出される合成樹脂のインサート成形によって
成形樹脂本体５２の下面に沿って一体化された容器の注
出口５０であって、図９，１０に示す液体容器５３の開
口部５３ａに取付けられるフランジ部５４と、このフラ
ンジ部５４と一体化された注口用筒体５５と、この筒体
５５の内側に設けられた口壁５６と、この口壁５６の上
面に形成された表スコアとしての無端状の裂溝５７と、
この裂溝５７の内側に形成された裂取部５８と、裂取用
部材５９とを有するものである。上記ガスバリヤー性フ
イルム５１はガスバリヤーシート５１ａの両面にポリエ
チレンフィルム５１ｂをラミネートしたものである。ま
た、液体容器５３は厚紙層５３ｂをベースとしてポリエ
チレン耐水層５３ｃ，ガスバリヤー層５３ｄをラミネー
トしたものである。2. Description of the Related Art FIGS.
No. 9024 relates to a container spout. (First Conventional Example) That is, this is a container spout 50 in which the gas barrier film 51 is integrated along the lower surface of the molded resin body 52 by insert molding of synthetic resin injected from the center. 9 and 10, a flange 54 attached to the opening 53a of the liquid container 53, a spouting cylinder 55 integrated with the flange 54, and a spouting cylinder 55 provided inside the cylinder 55. A mouth wall 56, an endless fissure 57 as a front score formed on the upper surface of the mouth wall 56,
It has a tearing portion 58 formed inside the fissure 57 and a tearing member 59. The gas barrier film 51 is obtained by laminating polyethylene films 51b on both sides of a gas barrier sheet 51a. The liquid container 53 is formed by laminating a polyethylene waterproof layer 53c and a gas barrier layer 53d based on a cardboard layer 53b.
【０００３】この容器の注出口５０は、ガスバリヤー性
フイルム５１が、中心部より射出される合成樹脂のイン
サート成形によって成形樹脂本体５２の平坦な下面に沿
って一体化されているので、これらの構成物が液密にシ
ールされ，全体として、液密性が高いという特徴がある
反面、裏スコアが無いので、開封強度が高く、そのた
め、開封が困難となることがある。In the spout 50 of this container, the gas barrier film 51 is integrated along the flat lower surface of the molded resin body 52 by insert molding of synthetic resin injected from the center. The component is sealed in a liquid-tight manner and has a high liquid-tightness as a whole. However, since there is no back score, the opening strength is high, so that opening may be difficult.
【０００４】この開封強度を低減させて、開封を容易に
するために、口壁に形成された表スコアとしての無端状
の裂溝に対応させて、断面ほぼ山状の裏スコアを形成さ
せた容器の注出口が例えば、実開昭６２−１９７５５２
号公報などによって知られている。（第二従来例） 図１１は、その要部の拡大断面図である。図において、
７１は容器の開口部に超音波溶着によって取付けられる
フランジ部、７２はこのフランジ部７１と一体化された
注口用筒体、７３はこの筒体７２の内側に設けられた口
壁、７４は表スコアとしての無端状の裂溝、７５は断面
ほぼ山状（先端角度９０度）の裏スコアである。In order to reduce the opening strength and facilitate opening, a back score having a substantially mountain-like cross section is formed corresponding to an endless fissure as a front score formed on the mouth wall. The spout of the container is, for example,
It is known from Japanese Patent Publication No. (Second Conventional Example) FIG. 11 is an enlarged sectional view of a main part thereof. In the figure,
Reference numeral 71 denotes a flange portion attached to the opening of the container by ultrasonic welding, 72 denotes a spout cylinder integrated with the flange portion 71, 73 denotes a mouth wall provided inside the cylinder 72, and 74 denotes a mouth wall provided inside the cylinder 72. An endless fissure as a front score, 75 is a back score having a substantially mountain-like cross section (tip angle 90 °).
【０００５】７６はアルミ等の金属箔を主体とするガス
バリヤーフィルムで、中心部より射出される合成樹脂の
インサート成形によって成形樹脂本体７７の下面形状に
沿って一体化される。図１２はその成形金型要部の断面
を示すものである。図において、７８は下型、７９はこ
の下型７８の中心に嵌合された金型コアで、内部に複数
の吸引孔８０が形成されている。８１は注口外型で下型
７８と対向している。８２は注口内型で、注口外型８１
に嵌合し、注口内型８２と注口外型８１との中間に注口
用筒体７２のキャビティ８３を形成すると共に、表スコ
アとしての無端状の裂溝７４を形成するための環状の凸
部８４を備えている。また、上記金型コア７９の上面に
は上記環状の凸部８４に対向して裏スコア７５を形成す
るための環状山型の凸部８５（先端角度９０度）を備え
ている。８６は注口内型８２の内部に嵌合するゲートピ
ースで、中心部の下部に射出用のゲート８７を備えてい
る。Reference numeral 76 denotes a gas barrier film mainly composed of a metal foil such as aluminum, which is integrated along the lower surface of the molded resin body 77 by insert molding of synthetic resin injected from the center. FIG. 12 shows a cross section of the main part of the molding die. In the figure, reference numeral 78 denotes a lower mold, 79 denotes a mold core fitted to the center of the lower mold 78, and a plurality of suction holes 80 are formed therein. Reference numeral 81 denotes a spout outer die which faces the lower die 78. Reference numeral 82 denotes a spout inner mold, and a spout outer mold 81.
To form a cavity 83 of the spout cylinder 72 in the middle between the spout inner mold 82 and the spout outer mold 81, and an annular protrusion for forming an endless fissure 74 as a front score. A portion 84 is provided. Further, an upper surface of the mold core 79 is provided with an annular mountain-shaped convex portion 85 (tip angle 90 °) for forming a back score 75 so as to face the annular convex portion 84. Reference numeral 86 denotes a gate piece that fits inside the spout inner die 82, and has an injection gate 87 at the lower part of the center.
【０００６】次に、この第二従来例に関する容器の注出
口の作り方について簡単に説明する。 アルミなどの金
属箔の両面にポリエチレンなどの合成樹脂フィルムをラ
ミネートし、図示しないダイスとポンチを用いて円形に
打ち抜く。打抜かれた金属箔を主体とするガスバリヤー
フィルム７６は、金型コア７９の上に吸引孔８０の吸引
作用によって、インサート位置に正確に保持され、金型
を閉じて、溶融樹脂をゲートピース８６中心部のスプル
ーを経て射出用のゲート８７よりキャビティ内に注入す
る。このとき金属箔を主体とするガスバリヤーフィルム
７６は、溶融樹脂の高圧によって環状山型の凸部８５に
沿って折曲げられ、成形樹脂本体７７に断面ほぼ山状の
裏スコア７５が形成される。Next, a brief description will be given of a method of forming a spout of the container according to the second conventional example. A synthetic resin film such as polyethylene is laminated on both surfaces of a metal foil such as aluminum, and punched into a circle using a die and a punch (not shown). The gas barrier film 76 mainly made of stamped metal foil is accurately held at the insert position by the suction action of the suction holes 80 on the mold core 79, and the mold is closed to melt the gate resin 86. It is injected into the cavity from the injection gate 87 through the central sprue. At this time, the gas barrier film 76 mainly composed of a metal foil is bent along the annular mountain-shaped convex portion 85 by the high pressure of the molten resin, and a back score 75 having a substantially mountain-shaped cross section is formed in the molded resin body 77. .
【０００７】このようにして成形された容器の注出口８
８をカートン容器の開口部に取付けるには、超音波溶着
手段がよく用いられる。以下図１３に基づいて説明す
る。図において、８９は表面に熱融着性樹脂をラミネー
トした紙製のカートン容器、８９ａはその開口部であ
る。容器の注出口８８をこの開口部８９ａの下側より貫
通させ、フランジ部７１を開口周縁部８９ｂと重ね合わ
す。これらを受台９０に載置し、上方より超音波ホーン
９１にて押圧し、超音波を印加して、上記重合物の密着
内面を熱融着させるものである。[0007] The spout 8 of the container thus formed
Ultrasonic welding means is often used to attach 8 to the opening of the carton container. This will be described below with reference to FIG. In the figure, 89 is a paper carton container whose surface is laminated with a heat-fusible resin, and 89a is its opening. The outlet 88 of the container is made to penetrate from below this opening 89a, and the flange 71 is overlapped with the opening peripheral part 89b. These are placed on a receiving table 90, pressed from above by an ultrasonic horn 91, and ultrasonic waves are applied to thermally bond the inner surface of the polymer in close contact.
【０００８】[0008]
【発明が解決しようとする課題】この第二従来例によれ
ば、金属箔が直角に折れ曲るため、折れ目に応力が集中
し、破断し易くなるため、開封強度が低減し、前記第一
従来例の問題点が解決される。 しかしながら、その反
面、第二従来例に示す容器の注出口をカートン容器に形
成した開口部に超音波溶着するにあたり、裏スコアの薄
肉部にピンホール又はガスバリヤーフィルムの破断が発
生し、容器の気密性やガスバリヤー性が低下するという
問題がある。According to this second conventional example, since the metal foil is bent at a right angle, stress is concentrated at the fold and the metal foil is easily broken, so that the opening strength is reduced, and The problem of one conventional example is solved. However, on the other hand, when the spout of the container shown in the second conventional example is ultrasonically welded to the opening formed in the carton container, a pinhole or a gas barrier film breaks in the thin portion of the back score, and the container There is a problem that airtightness and gas barrier properties are reduced.
【０００９】すなわち、上記の方法によって、容器の注
出口８８をカートン容器８９の開口部に超音波溶着した
場合、スコアにピンホールやガスバリヤーフィルムの破
断が多く発生することが判明した。このピンホール発生
の正確なメカニズムは不明であるが、裏スコアの折り曲
げ部において、インサート部と本体樹脂部との密着性が
悪くなるためと思われる。つまり、図１２に示すよう
に、中心に位置する射出用のゲート８７より放射状に流
れた樹脂は切妻状の裏スコア７５の下流（図１２では左
側）において、乱流が生じ易く、金属箔を主体とするイ
ンサート層７６に対する溶融樹脂の接圧力が低下するた
めとも考えられる。また、金属箔が直角に折れ曲るた
め、裏スコアの直上の薄肉部に超音波の振動が集中する
ことにより、インサート層の金属箔が破断し、更にピン
ホールが発生するものとも思われる。That is, it has been found that when the outlet 88 of the container is ultrasonically welded to the opening of the carton container 89 by the above-described method, a large number of pinholes and breakage of the gas barrier film occur in the score. Although the exact mechanism of this pinhole generation is unknown, it is presumed that the bent portion of the back score has poor adhesion between the insert portion and the main body resin portion. That is, as shown in FIG. 12, the resin radially flowing from the injection gate 87 located at the center is likely to generate turbulent flow downstream of the gable-shaped back score 75 (left side in FIG. 12), and the metal foil is removed. It is also considered that the contact pressure of the molten resin with respect to the insert layer 76, which is the main component, decreases. Further, since the metal foil is bent at a right angle, it is considered that the ultrasonic vibration is concentrated on the thin portion immediately above the back score, so that the metal foil of the insert layer is broken, and further a pinhole is generated.
【００１０】本発明はこれらの問題点を解決するために
なされたもので、開封強度を低減し、開封の容易性を保
持すると共に、注出口のフランジ部をカートン容器の開
口部に超音波溶着を行う際、スコアにピンホールが発生
することのない容器の注出口を提供することを目的とす
る。SUMMARY OF THE INVENTION The present invention has been made to solve these problems, and it is intended to reduce the opening strength, maintain the ease of opening, and ultrasonically weld the flange of the spout to the opening of the carton container. It is an object of the present invention to provide a container spout that does not generate a pinhole in the score when performing the process.
【００１１】[0011]
【課題を解決するための手段】本発明は、上記目的を達
成するためになされたもので、請求項１記載の容器の注
出口は、金属箔を有するインサート層が、中心部より射
出される合成樹脂のインサート成形によって成形樹脂本
体の下面形状に沿って一体化された容器の注出口であっ
て、容器の開口部に超音波溶着によって取付けられるフ
ランジ部と、このフランジ部と一体化された注口用筒体
と、この筒体の内側に設けられた口壁と、この口壁の上
面に形成された表スコアとしての無端状の裂溝と、この
裂溝の内側に形成された裂取部と、裂取用部材と、上記
裂溝に対応して前記口壁の下面に形成された断面ほぼ山
状の裏スコアと、を有する容器の注出口において、上記
裏スコアの、水平面に対する、内側斜面の傾斜よりも外
側斜面の傾斜を緩く形成したことを特徴とする。SUMMARY OF THE INVENTION The present invention has been made to achieve the above object. In the spout of the container according to the first aspect, an insert layer having a metal foil is injected from a central portion. A spout of a container integrated along the lower surface shape of the molded resin body by insert molding of a synthetic resin, and a flange attached to the opening of the container by ultrasonic welding, and integrated with the flange. A spout cylinder, a mouth wall provided inside the cylinder, an endless fissure as a front score formed on an upper surface of the mouth wall, and a tear formed inside the fissure Part, a tearing member, and a back score having a substantially mountain-shaped cross section formed on the lower surface of the mouth wall corresponding to the fissure, at the spout of the container, the back score, with respect to the horizontal plane, The slope of the outer slope is less gradual than the slope of the inner slope Characterized in that the formed.
【００１２】また、請求項２記載の容器の注出口は、裏
スコアの、垂直面に対する、内側斜面の傾斜角度がほぼ
５０度、外側斜面の傾斜角度がほぼ７０度であることを
特徴とする。Further, the spout of the container according to the second aspect is characterized in that the inclination angle of the inner slope is approximately 50 degrees and the inclination angle of the outer slope is approximately 70 degrees with respect to the vertical surface of the back score. .
【００１３】[0013]
【発明の実施の形態】本発明者は、開封強度を低減する
には、金属箔を有するインサート層が、成形樹脂本体の
下面形状に沿って一体化され、口壁上面の表スコアとし
ての無端状の裂溝に対応して前記口壁の下面に断面ほぼ
山状の裏スコアを形成することが最低限必要であり、超
音波溶着するにあたり、裏スコアの薄肉部にピンホール
が発生しないようにするには、裏スコアの形状を特定す
ればよいと考え、種々実験研究を行った結果、本発明が
得られたものである。BEST MODE FOR CARRYING OUT THE INVENTION The present inventor has determined that in order to reduce the opening strength, an insert layer having a metal foil is integrated along the lower surface shape of a molded resin body, and an endless end score as a front score on an upper surface of a mouth wall is provided. It is necessary at least to form a back score having a substantially mountain-shaped cross section on the lower surface of the mouth wall corresponding to the fissure of the shape, and in performing ultrasonic welding, a pinhole is not generated in a thin portion of the back score. It is considered that the shape of the back score may be specified in order to achieve the above, and the present invention was obtained as a result of various experimental studies.
【００１４】図１〜図７はこの発明の実施例に関するも
ので、図１は縦断側面図、図２は平面図、図３は最も好
ましい要部の寸法関係の説明図、図４は要部の拡大断面
図、図５はスコアの平面図、図６はインサート成形金型
の断面図、図７は超音波溶着状態を示す断面図である。FIGS. 1 to 7 relate to an embodiment of the present invention. FIG. 1 is a longitudinal side view, FIG. 2 is a plan view, FIG. 3 is an explanatory view of the most preferable dimensional relationship of main parts, and FIG. 5 is a plan view of the score, FIG. 6 is a cross-sectional view of the insert molding die, and FIG. 7 is a cross-sectional view showing an ultrasonic welding state.
【００１５】図において、１は金属箔（アルミ箔）１ａ
の両面にポリエチレン１ｂをラミネートしたインサート
層で、成形樹脂本体２の下面形状に沿って一体化されて
いる。３はフランジ部で、カートン容器の開口部に後述
する超音波溶着によって取付けられるものである。４は
注口用筒体でフランジ部３の内側より一体に立上がり、
外側に蓋取付け用螺旋５が形成されている。６は口壁
で、開封前に容器の開口部を閉塞するはたらきをする。
７はこの口壁６の上面に形成された表スコアとしての無
端状の裂溝で、図３，４に示すように細幅の底面を有す
る断面ほぼＶ字形の無端溝である。８は裂取部で、注口
用筒体４の内側に形成され、一側に裂取用部材９を立設
し、その上端にプルリング１０を一体に有している。In the drawing, reference numeral 1 denotes a metal foil (aluminum foil) 1a
Are integrated along the lower surface shape of the molded resin body 2 with an insert layer obtained by laminating polyethylene 1b on both surfaces of the molded resin body 2. Reference numeral 3 denotes a flange which is attached to the opening of the carton container by ultrasonic welding described later. Reference numeral 4 denotes a spout cylinder, which rises integrally from the inside of the flange portion 3,
A spiral 5 for attaching a lid is formed on the outside. Reference numeral 6 denotes a mouth wall, which serves to close the opening of the container before opening.
Reference numeral 7 denotes an endless fissure formed on the upper surface of the mouth wall 6 as a front score, and as shown in FIGS. Reference numeral 8 denotes a tearing portion, which is formed inside the spouting cylinder 4, has a tearing member 9 erected on one side, and integrally has a pull ring 10 at its upper end.
【００１６】１１は本発明で最も重要な断面ほぼ山状の
裏スコアで、図３，４で明らかなように、山の頂点より
内側（図では左側）の内側斜面１１ａの、水平面に対す
る、傾斜よりも外側（図では右側）の外側斜面１１ｂの
傾斜を緩く形成したものである。最も好ましい寸法は図
３に示すように、裏スコアの垂直面に対する、内側斜面
の傾斜角度がほぼ５０度、外側斜面の傾斜角度がほぼ７
０度である。このように、裏スコアの形状を特定した理
由は後述する。上記裂溝及び裏スコアの平面形状は図５
に示すように、切裂き開始時に応力が集中出来るよう
に、一側に偏り，尖った形状を呈している。Numeral 11 is the most important cross-section score of the back of the present invention, as is apparent from FIGS. The outer slope 11b on the outer side (right side in the figure) is formed to have a gentle inclination. As shown in FIG. 3, the most preferable dimensions are such that the inclination angle of the inner slope is approximately 50 degrees and the inclination angle of the outer slope is approximately 7 with respect to the vertical surface of the back score.
0 degrees. The reason for specifying the shape of the back score in this way will be described later. The plan shape of the fissure and the back score is shown in FIG.
As shown in (1), it has a one-sided and pointed shape so that stress can be concentrated at the start of the tearing.
【００１７】図６は成形金型要部の断面を示すものであ
る。図において、２１は下型、２２はこの下型２１の中
心に嵌合された金型コアで、内部に複数の吸引孔２３が
形成されている。２４は注口外型で下型２１と対向して
いる。２５は注口内型で注口外型２４に嵌合し注口内型
２５と注口外型２４との中間に注口用筒体４のキャビテ
ィ２６を形成し、表スコアとしての無端状の裂溝７を形
成するための環状の凸部２７を備えている。また、上記
金型コア２２の上面には上記環状の凸部２７に対向して
裏スコア１１を形成するための環状山型の凸部２８を備
えている。２９は注口内型２５の内部に嵌合するゲート
ピースで、中心部の下部に射出用のゲート３０を備えて
いる。FIG. 6 shows a cross section of a main part of a molding die. In the figure, reference numeral 21 denotes a lower mold, and 22 denotes a mold core fitted to the center of the lower mold 21, and a plurality of suction holes 23 are formed therein. Reference numeral 24 denotes a spout outer die which faces the lower die 21. Reference numeral 25 denotes a spout inner mold, which is fitted to the spout outer mold 24 to form a cavity 26 of the spout cylinder 4 in the middle between the spout inner mold 25 and the spout outer mold 24. Is provided. The upper surface of the mold core 22 is provided with an annular mountain-shaped convex portion 28 for forming the back score 11 so as to face the annular convex portion 27. Reference numeral 29 denotes a gate piece fitted into the inside of the spout inner die 25. The gate piece 29 has an injection gate 30 at the lower part of the center.
【００１８】次に、前記した本発明実施例に関する容器
の注出口の作り方について簡単に説明する。 アルミな
どの金属箔１ａの両面にポリエチレンなどの合成樹脂フ
ィルム１ｂをラミネートし、図示しないダイスとポンチ
を用いて円形に打ち抜く。打抜かれた金属箔を主体とす
るインサート層１は、金型コア２２の上に吸引孔２３の
吸引作用によって、インサート位置に正確に保持され、
金型を閉じて、溶融樹脂をゲートピース２９のスプルー
を経て射出用のゲート３０よりキャビティ内に注入す
る。このとき金属箔を主体とするインサート層１は、溶
融樹脂の高圧によって環状山型の凸部２８に沿って折曲
げられ、成形樹脂本体２に断面ほぼ山状の裏スコア１１
が形成される。Next, a brief description will be given of how to make the spout of the container according to the above-mentioned embodiment of the present invention. A synthetic resin film 1b such as polyethylene is laminated on both sides of a metal foil 1a such as aluminum, and is punched into a circle using a die and a punch (not shown). The insert layer 1 mainly composed of stamped metal foil is accurately held at the insert position on the mold core 22 by the suction action of the suction hole 23.
The mold is closed, and the molten resin is injected into the cavity from the injection gate 30 through the sprue of the gate piece 29. At this time, the insert layer 1 mainly composed of a metal foil is bent along the annular mountain-shaped projection 28 by the high pressure of the molten resin, and the molded resin body 2 has a back score 11 having a substantially mountain-shaped cross section.
Is formed.
【００１９】射出用のゲート３０よりキャビティ内に注
入された溶融樹脂は表スコアと裏スコアとで挟まれた狭
い帯域を通過するにあたり、図１２のような従来技術で
は、溶融樹脂が、内側斜面上を流動して傾斜のきつい外
側斜面を通過した後に、乱流が生じ、金属箔を主体とす
るインサート層に対する溶融樹脂の接圧力が低下する可
能性があったのに対し、図４で示す実施例では、外側斜
面の傾斜が比較的緩やかなために、溶融樹脂が、内側斜
面上を流動して整流状態で外側斜面を通過するため、溶
融樹脂と金属箔を主体とするインサート層とは良く密着
する。このため、超音波溶着の際に、裏スコアの薄肉部
にピンホールが発生することがなく、容器の気密性が低
下するという心配がない。又、インサート層のガスバリ
ヤーフィルムの破断もなくなり、容器のガスバリヤー性
が低下するという心配がない。When the molten resin injected into the cavity from the injection gate 30 passes through a narrow band sandwiched between the front score and the back score, in the prior art as shown in FIG. The turbulence occurred after flowing over the steep outer slope, and there was a possibility that the contact pressure of the molten resin against the insert layer mainly composed of metal foil was reduced, as shown in FIG. In the embodiment, since the inclination of the outer slope is relatively gentle, the molten resin flows on the inner slope and passes through the outer slope in a rectified state. Adhere well. Therefore, during ultrasonic welding, pinholes do not occur in the thin portion of the back score, and there is no concern that the hermeticity of the container is reduced. In addition, there is no breakage of the gas barrier film of the insert layer, and there is no fear that the gas barrier property of the container is reduced.
【００２０】次に、このようにして成形された容器の注
出口３２を超音波溶着によってカートン容器に取付ける
手段を図７に基づいて説明する。図において、３１は表
面に熱融着性樹脂をラミネートした紙製のカートン容
器、３１ａはその開口部、３１Ａは開口端、３２Ａは該
開口端３１Ａが嵌着される嵌合溝である。容器の注出口
３２をこの開口部３１ａの下側より貫通させ、フランジ
部３を開口周縁部３１ｂと重ね合わす。これらを受台３
３に載置し、上方より超音波ホーン３４にて押圧し、超
音波を印加して、上記重合物の密着内面を熱融着させる
ものである。Next, means for attaching the spout 32 of the container thus formed to the carton container by ultrasonic welding will be described with reference to FIG. In the figure, 31 is a paper carton container whose surface is laminated with a heat-fusible resin, 31a is an opening thereof, 31A is an opening end, and 32A is a fitting groove in which the opening end 31A is fitted. The spout 32 of the container is made to penetrate from below this opening 31a, and the flange 3 is overlapped with the opening peripheral part 31b. These are cradle 3
3 and pressed by an ultrasonic horn 34 from above to apply ultrasonic waves to thermally fuse the inner surface of the polymer.
【００２１】図１３に示す従来例では、前記したよう
に、金属箔が直角に折れ曲るため、裏スコアの直上の薄
肉部に超音波の振動が集中することにより、ピンホール
やガスバリヤーフィルムの破断が発生するという現象が
あり、そのため容器の気密性やガスバリヤー性を損なう
という問題があったが、この実施例においては、図７に
示すように、上記裏スコアの、水平面に対する、内側斜
面の傾斜よりも外側斜面の傾斜を緩く形成したことによ
って、上方より超音波ホーン３４にて押圧し、超音波を
印加した際、フランジ部３に発生する振動は裏スコア１
１の直上の薄肉部に集中することなく、緩やかな外側斜
面の傾斜を乗り越えて内側に分散して拡散するため、裏
スコアの直上の薄肉部においてもピンホールやガスバリ
ヤーフィルムの破断が発生する恐れがない。In the conventional example shown in FIG. 13, as described above, since the metal foil is bent at a right angle, the vibration of the ultrasonic wave concentrates on the thin portion immediately above the back score, thereby causing the pinhole or the gas barrier film to fail. However, there is a problem that the airtightness and gas barrier property of the container are impaired. However, in this embodiment, as shown in FIG. Since the slope of the outer slope is formed to be gentler than the slope of the slope, the vibration generated in the flange portion 3 when the ultrasonic horn 34 is pressed from above and ultrasonic waves are applied, the back score 1
Since it is not concentrated on the thin portion just above 1 but gets over the gentle slope of the outer slope and is dispersed and diffused inward, pinholes and breakage of the gas barrier film occur even in the thin portion just above the back score. There is no fear.
【００２２】[0022]
【実施例】厚さ２０μのアルミ箔の両面をポリエチレン
フィルムで被覆し、ポンチとダイスを用いて円形に打ち
抜いたインサート材を図６に示す金型にインサートし、
低密度ポリエチレン樹脂を射出成型機を用いてゲートよ
り射出し、インサート成形を行い、図７に示す容器の注
出口３２を作成した。EXAMPLE An aluminum foil having a thickness of 20 μm was covered on both sides with a polyethylene film, and an insert material punched into a circle using a punch and a die was inserted into a mold shown in FIG.
A low-density polyethylene resin was injected from the gate using an injection molding machine, and insert molding was performed to form a spout 32 of the container shown in FIG.
【００２３】比較例１として、同様のインサート材を図
６の金型コア２２より突出する環状山型の凸部２８を除
去した金型にインサートし、裏スコアのない容器の注出
口を作成した。比較例２として、図８に示すように、裏
スコアの角度が９０度、内側、外側の傾斜を等しくした
容器の注出口を作成した。As Comparative Example 1, the same insert material was inserted into a mold from which the annular mountain-shaped convex portion 28 protruding from the mold core 22 in FIG. 6 was removed, to form a spout for a container without a back score. . As Comparative Example 2, as shown in FIG. 8, a spout of a container was prepared in which the angle of the back score was 90 degrees, and the inside and outside inclinations were equal.
【００２４】容器の注出口の各サンプル５０個を１０℃
に冷却後、超音波溶着機（日本エマソン株式会社製９２
０ＭＡ）を用いて、所定の紙製カートン容器本体の開口
部に溶着した。溶着後、放電チエッカーによりスコア部
のピンホール発生の有無を判定すると共に、目視により
スコア部のアルミフィルム破断の有無を判定した。ま
た、引張り試験機によりプルリングの開封強度を測定し
た。各サンプルの試験結果を表１に示す。50 samples of each of the spouts of the container were placed at 10 ° C.
After the cooling, the ultrasonic welding machine (Nippon Emerson Corporation 92
0MA) and welded to the opening of the predetermined paper carton container body. After welding, the presence or absence of pinholes in the score portion was determined by a discharge checker, and the presence or absence of aluminum film breakage in the score portion was visually determined. Further, the opening strength of the pull ring was measured by a tensile tester. Table 1 shows the test results of each sample.
【００２５】[0025]
【表１】 [Table 1]
【００２６】試験結果により、実施例のものは、ピンホ
ール及びアルミフィルムの破断の発生がなく、開封性も
良好であった。これに対し、比較例１のものは開封強度
が４Kgｆを越え、開封が困難であった。また、比較例２
のものは、開封強度は低いが、スコア部にピンホール及
びアルムフィルムの破断が発生した。From the test results, it was found that the example had no pinholes and no breakage of the aluminum film, and had good openability. On the other hand, in the case of Comparative Example 1, the opening strength exceeded 4 kgf and opening was difficult. Comparative Example 2
Although the unsealing strength was low, pinholes and breakage of the alum film occurred in the score portion.
【００２７】[0027]
【発明の効果】本発明は、以上説明したように構成され
ているので、以下に記載されるような効果を奏する。Since the present invention is configured as described above, it has the following effects.
【００２８】金属箔を有するインサート層を底面に有す
る成形樹脂本体の裏スコアの、水平面に対する、内側斜
面の傾斜よりも外側斜面の傾斜を緩く形成したことによ
り、溶融樹脂が、内側斜面上を流動して整流状態で外側
斜面を通過して、溶融樹脂と金属箔を主体とするインサ
ート層とは良く密着するため、また、フランジ部に印加
される超音波の振動が裏スコアの直上の薄肉部に集中し
なくなるため、スコア部にピンホール又はガスバリヤー
フィルムの破断が発生しなくなり、容器の気密性及びガ
スバリヤー性を保持することが出来る。 また、金属箔
を有する折れ曲がった断面ほぼ山状の裏スコアが無端状
に存在するため、折目に応力が集中し、破断し易いの
で、開封強度を低減させることが出来る。The back score of the molded resin body having the insert layer having the metal foil on the bottom surface is formed so that the inclination of the outer slope is smaller than that of the inner slope with respect to the horizontal plane, so that the molten resin flows on the inner slope. In the rectified state, it passes through the outer slope, and the molten resin and the insert layer mainly composed of metal foil adhere well, and the vibration of the ultrasonic wave applied to the flange portion is a thin portion just above the back score. Therefore, pinholes or breakage of the gas barrier film do not occur in the score portion, and the airtightness and gas barrier properties of the container can be maintained. In addition, since the bent back cross-section having the metal foil and having a substantially mountain-shaped back score exists endlessly, stress is concentrated at the fold and the sheet is easily broken, so that the opening strength can be reduced.
【００２９】また、裏スコアの、垂直面に対する、内側
斜面の傾斜角度をほぼ５０度、外側斜面の傾斜角度をほ
ぼ７０度とすることにより、上記の効果がより確実に達
成出来る。The above effect can be more reliably achieved by setting the inclination angle of the inner slope to approximately 50 degrees and the inclination angle of the outer slope to approximately 70 degrees with respect to the vertical surface of the back score.
【図１】本発明の容器の注出口の縦断側面図（図２のI
−I線切断面図）である。FIG. 1 is a longitudinal sectional side view of an outlet of a container of the present invention (I in FIG. 2).
-I line sectional view).
【図２】本発明の容器の注出口の平面図である。FIG. 2 is a plan view of a spout of the container of the present invention.
【図３】本発明の最も好ましい要部の説明図である。FIG. 3 is an explanatory diagram of a most preferable main part of the present invention.
【図４】本発明の要部の拡大断面図である。FIG. 4 is an enlarged sectional view of a main part of the present invention.
【図５】本発明のスコアの平面図である。FIG. 5 is a plan view of a score of the present invention.
【図６】本発明の容器の注出口の製造に使用するインサ
ート成形金型の断面図である。FIG. 6 is a cross-sectional view of an insert molding die used for manufacturing a spout of the container of the present invention.
【図７】本発明の容器の注出口を紙製容器本体の開口部
に超音波溶着するときの断面図である。FIG. 7 is a cross-sectional view when the spout of the container of the present invention is ultrasonically welded to the opening of the paper container main body.
【図８】比較例２の要部の説明図である。FIG. 8 is an explanatory diagram of a main part of Comparative Example 2.
【図９】第一従来例の容器の注出口を紙製容器本体の開
口部に装着したときの断面図である。FIG. 9 is a cross-sectional view when the spout of the container of the first conventional example is attached to the opening of the paper container main body.
【図１０】同上全体の斜視図である。FIG. 10 is an overall perspective view of the same.
【図１１】第二従来例の要部の断面図である。FIG. 11 is a sectional view of a main part of a second conventional example.
【図１２】第二従来例の容器の注出口の製造に使用する
インサート成形金型の要部の断面図である。FIG. 12 is a sectional view of a main part of an insert molding die used for manufacturing a spout of a container according to a second conventional example.
【図１３】第二従来例の容器の注出口を紙製容器本体の
開口部に超音波溶着するときの断面図である。FIG. 13 is a cross-sectional view when the spout of the container of the second conventional example is ultrasonically welded to the opening of the paper container main body.
１ インサート層 １ａ 金属箔（アルミ箔） １ｂ ポリエチレン ２ 成形樹脂本体 ３ フランジ部 ４ 注口用筒体 ５ 蓋取付け用螺旋 ６ 口壁 ７ 裂溝（表スコア） ８ 裂取部 ９ 裂取用部材 １０ プルリング １１ 裏スコア １１ａ 内側斜面 １１ｂ 外側斜面 ２１ 下型 ２２ 金型コア ２３ 吸引孔 ２４ 注口外型 ２５ 注口内型 ２６ 注口用筒体のキャビティ ２７ 環状の凸部 ２８ 環状山型の凸部 ２９ ゲートピース ３０ ゲート ３１ カートン容器 ３１ａ 開口部 ３１ｂ 開口周縁部 ３２ 容器の注出口 ３３ 受台 ３４ 超音波ホーン ５０ 容器の注出口 ５１ ガスバリヤー性フイルム ５１ａ ガスバリヤーシート ５１ｂ ポリエチレンフィルム ５２ 成形樹脂本体 ５３ 液体容器 ５３ａ 開口部 ５３ｂ 厚紙層 ５３ｃ ポリエチレン耐水層 ５３ｄ ガスバリヤー層 ５４ フランジ部 ５５ 注口用筒体 ５６ 口壁 ５７ 裂溝 ５８ 裂取部 ５９ 裂取用部材 ７１ フランジ部 ７２ 注口用筒体 ７３ 口壁 ７４ 裂溝 ７５ 裏スコア ７６ ガスバリヤーフィルム ７７ 成形樹脂本体 ７８ 下型 ７９ 金型コア ８０ 吸引孔 ８１ 注口外型 ８２ 注口内型 ８３ 注口用筒体のキャビティ ８４ 環状の凸部 ８５ 環状山型の凸部 ８６ ゲートピース ８７ ゲート ８８ 容器の注出口 ８９ カートン容器 ８９ａ 開口部 ８９ｂ 開口周縁部 ９０ 受台 ９１ 超音波ホーン DESCRIPTION OF SYMBOLS 1 Insert layer 1a Metal foil (aluminum foil) 1b Polyethylene 2 Molded resin main body 3 Flange part 4 Spouting cylinder 5 Spiral for lid attachment 6 Mouth wall 7 Split groove (table score) 8 Splitting part 9 Splitting member 10 Pull ring 11 Back Score 11a Inner Slope 11b Outer Slope 21 Lower Die 22 Mold Core 23 Suction Hole 24 Outer Die 25 Inner Die 26 Cavity of Spout Cylindrical Body 27 Annular Protrusion 28 Annular Convex Protrusion 29 Gate Piece Reference Signs List 30 Gate 31 Carton container 31a Opening 31b Opening edge 32 Container spout 33 Receiving tray 34 Ultrasonic horn 50 Container spout 51 Gas barrier film 51a Gas barrier sheet 51b Polyethylene film 52 Molded resin body 53 Liquid container 53a Opening Part 53b cardboard layer 53c polyethylene waterproof layer 53d gas barrier 54 Flange part 55 Injection cylinder body 56 Mouth wall 57 Split groove 58 Splitting part 59 Splitting member 71 Flange part 72 Spouting cylinder body 73 Portion wall 74 Split groove 75 Back score 76 Gas barrier film 77 Molding resin main body 78 Lower mold 79 Mold core 80 Suction hole 81 Outer mouth mold 82 Inner mouth mold 83 Cavity of mouthpiece cylinder 84 Annular convex part 85 Annular convex part 86 Gate piece 87 Gate 88 Container spout 89 Carton container 89a Opening 89b Peripheral of opening 90 Receiving table 91 Ultrasonic horn
フロントページの続き (72)発明者 遠藤 憲一 東京都新宿区市谷加賀町一丁目１番１号 大日本印刷株式会社内 (72)発明者 池田 聡 奈良県北葛城郡広陵町大字寺戸53番地 三 笠産業株式会社内 Ｆターム(参考） 3E084 AA05 AA12 AA34 AA37 AB01 BA03 CA01 CB01 CB02 CB04 CC01 CC03 CC08 DA01 DB12 DC03 EA01 EB02 EB04 EC01 EC03 EC09 FA09 FB01 GA01 GB01 GB08 GB12 GB13 GB17 HA01 HB03 HC07 HD01 KB01 LA03 LA07 LA17 LB02 LB07 LD01 Continuation of front page (72) Inventor Kenichi Endo 1-1-1, Ichigaya-Kagacho, Shinjuku-ku, Tokyo Inside Dai Nippon Printing Co., Ltd. (72) Inventor Satoshi Ikeda 53, Terado, Koryo-cho, Kitakatsugi-gun, Nara Prefecture Mikasa Sangyo In-house F-term (reference) 3E084 AA05 AA12 AA34 AA37 AB01 BA03 CA01 CB01 CB02 CB04 CC01 CC03 CC08 DA01 DB12 DC03 EA01 EB02 EB04 EC01 EC03 EC09 FA09 FB01 GA01 GB01 GB08 GB12 GB13 GB17 HA01 HB03 HC07 HD01 KB01 LA03 LA03
Claims (2)
より射出される合成樹脂のインサート成形によって成形
樹脂本体の下面形状に沿って一体化された容器の注出口
であって、容器の開口部に超音波溶着によって取付けら
れるフランジ部と、このフランジ部と一体化された注口
用筒体と、この筒体の内側に設けられた口壁と、この口
壁の上面に形成された表スコアとしての無端状の裂溝
と、この裂溝の内側に形成された裂取部と、裂取用部材
と、上記裂溝に対応して前記口壁の下面に形成された断
面ほぼ山状の裏スコアと、を有する容器の注出口におい
て、 上記裏スコアの、水平面に対する、内側斜面の傾
斜よりも外側斜面の傾斜を緩く形成したことを特徴とす
る容器の注出口。1. A container spout in which an insert layer having a metal foil is integrated along a lower surface shape of a molded resin body by insert molding of a synthetic resin injected from a center portion, wherein an opening of the container is provided. , A spout cylinder integrated with the flange, a mouth wall provided inside the cylinder, and a table score formed on the upper surface of the mouth wall. Endless fissure, a tearing portion formed inside the fissure, a tearing member, and a substantially mountain-shaped back surface formed on the lower surface of the mouth wall corresponding to the fissure. A spout of a container having a score, wherein the inclination of the outer slope is formed to be gentler than the inclination of the inner slope with respect to the horizontal plane of the back score.
の傾斜角度がほぼ５０度、外側斜面の傾斜角度がほぼ７
０度である請求項１記載の容器の注出口。2. The inclination angle of the inner slope of the back score with respect to the vertical plane is approximately 50 degrees, and the inclination angle of the outer slope is approximately 7 degrees.
2. The spout of claim 1, wherein the angle is 0 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000174811A JP4448600B2 (en) | 2000-06-12 | 2000-06-12 | Container spout |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000174811A JP4448600B2 (en) | 2000-06-12 | 2000-06-12 | Container spout |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2001354257A true JP2001354257A (en) | 2001-12-25 |
| JP4448600B2 JP4448600B2 (en) | 2010-04-14 |
Family
ID=18676779
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000174811A Expired - Fee Related JP4448600B2 (en) | 2000-06-12 | 2000-06-12 | Container spout |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4448600B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1813410A1 (en) * | 2006-01-27 | 2007-08-01 | Tetra Laval Holdings & Finance S.A. | Unit and method for molding opening devices for application to packages of pourable food products |
| JP2008297000A (en) * | 2007-06-04 | 2008-12-11 | Hokkai Can Co Ltd | Spout stopper |
| JP2012254816A (en) * | 2011-06-09 | 2012-12-27 | Toyo Seikan Kaisha Ltd | Injection cap |
| JP2014166874A (en) * | 2013-02-28 | 2014-09-11 | Yoshino Kogyosho Co Ltd | Dispensing cap |
-
2000
- 2000-06-12 JP JP2000174811A patent/JP4448600B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1813410A1 (en) * | 2006-01-27 | 2007-08-01 | Tetra Laval Holdings & Finance S.A. | Unit and method for molding opening devices for application to packages of pourable food products |
| WO2007085340A1 (en) * | 2006-01-27 | 2007-08-02 | Tetra Laval Holdings & Finance Sa | Unit and method for molding opening devices for application to packages of pourable food products |
| JP2009524534A (en) * | 2006-01-27 | 2009-07-02 | テトラ ラバル ホールデイングス エ フイナンス ソシエテ アノニム | Unit and method for molding an opening device for application to a package of pourable food |
| CN101360597B (en) * | 2006-01-27 | 2011-04-20 | 利乐拉瓦尔集团及财务有限公司 | Unit and method for molding opening devices for application to packages of pourable food products |
| US8641403B2 (en) | 2006-01-27 | 2014-02-04 | Tetra Laval Holdings & Finance S.A. | Unit and method for molding opening devices for application to packages of pourable food products |
| JP2008297000A (en) * | 2007-06-04 | 2008-12-11 | Hokkai Can Co Ltd | Spout stopper |
| JP2012254816A (en) * | 2011-06-09 | 2012-12-27 | Toyo Seikan Kaisha Ltd | Injection cap |
| JP2014166874A (en) * | 2013-02-28 | 2014-09-11 | Yoshino Kogyosho Co Ltd | Dispensing cap |
Also Published As
| Publication number | Publication date |
|---|---|
| JP4448600B2 (en) | 2010-04-14 |
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