JP2014104984A - Molding inspection device, molding inspection method, package filling device, and package filling method - Google Patents
Molding inspection device, molding inspection method, package filling device, and package filling method Download PDFInfo
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本発明は、紙製スリーブの頂端に樹脂を射出成形して蓋部を形成し、スリーブの他端の開口から食品を充填して開口を封止して複合紙容器の底部を形成する包装充填システムにおいて、射出成形された蓋部の薄肉部の肉厚を測定して検査する装置及び方法に関し、更に、この検査を利用して包装充填する装置及び方法に関する。 The present invention is a packaging filling in which a resin is injection-molded on the top end of a paper sleeve to form a lid, and food is filled from the opening at the other end of the sleeve to seal the opening to form the bottom of the composite paper container. The present invention relates to an apparatus and method for measuring and inspecting the thickness of a thin portion of an injection-molded lid, and further to an apparatus and method for packaging and filling using this inspection.
柔軟性に富んだ紙製包装材料は多年にわたって液体食品を包装するために用いられてきた。牛乳、果汁ジュース、野菜ジュース、豆乳、ワイン、清酒、焼酎、ミネラルウォーター、スープ及びその他飲料のための包装容器は、例えば、繊維質基材（例えば、紙など）／プラスチック積層体に折目線が付けられたウェブ状包装材料を、容器用寸法の紙片に裁断し、その長手方向の縦線シールにより円筒状のスリーブに成形し、この紙製スリーブの頂端に樹脂を射出成形して蓋部を形成し、スリーブの他端の開口から液体食品を充填して開口を封止して底部を形成し、複合紙容器を得る。蓋部には、開口部やストロー孔のための蓋部の薄肉部が設けられる。（例えば、特許文献１、２参照）
包装充填された紙容器の開口部や薄肉部のシール状態を検査する為に、検査対象箇所の外側及び内側に電極を配する、例えば、プローブ電極及びアース電極を配設し、導電性バリア層を用いてプローブ電極とアース電極との間に流れる電流を検出してシール状態を検査するシール状態検査装置及び方法である。
（例えば、特許文献３参照）
Flexible paper packaging materials have been used for many years to package liquid foods. Packaging containers for milk, fruit juice, vegetable juice, soy milk, wine, sake, shochu, mineral water, soup and other beverages have, for example, a fiber substrate (eg, paper, etc.) / Plastic laminate with crease lines The attached web-like packaging material is cut into a paper piece of a container size, formed into a cylindrical sleeve with a longitudinal line seal in the longitudinal direction, and a resin is injection-molded on the top end of the paper sleeve to form a lid portion. Then, liquid food is filled from the opening at the other end of the sleeve, and the opening is sealed to form the bottom, thereby obtaining a composite paper container. The lid portion is provided with a thin portion of the lid portion for the opening and the straw hole. (For example, see Patent Documents 1 and 2)
In order to inspect the sealed state of the opening and thin portion of the packaged paper container, electrodes are arranged on the outside and inside of the location to be inspected, for example, a probe electrode and a ground electrode are provided, and a conductive barrier layer A seal state inspection apparatus and method for inspecting a seal state by detecting a current flowing between a probe electrode and a ground electrode.
(For example, see Patent Document 3)
複合紙容器の蓋部の開口部／薄肉部を検査する場合、インラインで非破壊検査することが難しく、サンプリングで取出した容器を検査する。検査した包装充填容器は検査後に廃棄される。
薄肉部が的確に樹脂で射出成形され、ピンホールなどの欠陥が出ていないことを確認するには、例えば、製造開始時に製品の包装充填容器を抜き取り、所定の厚肉部を計測して確認する。例えば、実用的な接触式の肉厚測定器を用いても、非常に狭い幅で成形される脆化部の測定には不向きである。この測定器の先端のプローブが尖っていると、測定誤差が発生しやすくなり、従って、厚肉部を測定し、薄肉部の厚みを推定する。しかし、信頼性に疑問が有る。
更に、上述のように測定サンプルは製品の包装充填容器であり、破壊テストなので、製品が無駄になり、製造コストを押し上げる。
When inspecting the opening / thinned portion of the lid of the composite paper container, it is difficult to perform non-destructive inspection in-line, and the container taken out by sampling is inspected. The inspected packaging and filling container is discarded after the inspection.
To confirm that the thin-walled part has been accurately injection-molded with resin and that there are no pinholes or other defects, for example, at the start of production, the product packaging filling container is pulled out, and the predetermined thick-walled part is measured and checked. To do. For example, even if a practical contact-type thickness measuring device is used, it is not suitable for measuring an embrittled portion formed with a very narrow width. If the probe at the tip of the measuring instrument is sharp, a measurement error is likely to occur. Therefore, the thick part is measured and the thickness of the thin part is estimated. However, there are doubts about reliability.
Furthermore, as described above, the measurement sample is a packaging and filling container for the product and is a destructive test, so that the product is wasted and the manufacturing cost is increased.
本発明は、複合紙容器の蓋部の開口部／薄肉部の検査を、非常に狭い幅で成形される脆化部や開口部／薄肉部の測定であっても、検査の信頼性が高く、インラインで非破壊検査することができて、製品が無駄にならず、製造コストを下げることができる成形検査装置、成形検査方法、包装充填装置及び包装充填方法を提供することを目的とする。 The present invention provides a high reliability of inspection even when measuring the opening / thin wall portion of the lid of the composite paper container, even when measuring an embrittled portion or an opening / thin wall portion formed with a very narrow width. It is an object of the present invention to provide a molding inspection apparatus, a molding inspection method, a packaging filling apparatus, and a packaging filling method that can perform non-destructive inspection in-line, reduce product costs, and reduce manufacturing costs.
本発明の成形検査装置は、紙積層包装材料から成形された円筒状スリーブを、スリーブの頂端に樹脂を射出成形して蓋部を形成する射出成形手段と、スリーブの他端の開口から液体食品を充填する充填手段と、開口を封止して底部を形成する封止手段とを有する、複合紙容器を得る包装充填システムにおいて、
射出成形手段が、スリーブの他端の開口からスリーブの頂端に、先端が導電性内側金型であるマンドレルをスリーブ内部に嵌め、スリーブの頂端に内側金型を覆う導電性外側金型を配設して蓋部用のキャビィティーを形成し、キャビィティー内部にゲートから溶融樹脂を射出し冷却して薄肉部を有する蓋部を形成し、
射出成形手段に設けられた検査手段が、内側金型を一方の電極とし、外側金型を他方の電極とし、電極間に電位差を印加して蓋部の薄肉部を検査することを特徴とする。
The molding inspection apparatus of the present invention includes a cylindrical sleeve molded from a paper laminate packaging material, an injection molding means for forming a lid portion by injection molding a resin on the top end of the sleeve, and a liquid food from the opening at the other end of the sleeve. In a packaging and filling system for obtaining a composite paper container, comprising: a filling means for filling a container; and a sealing means for sealing an opening to form a bottom.
The injection molding means fits a mandrel whose tip is a conductive inner mold from the opening at the other end of the sleeve to the inside of the sleeve, and a conductive outer mold that covers the inner mold at the top end of the sleeve. And forming a cavity for the lid part, injecting molten resin from the gate inside the cavity and cooling to form a lid part having a thin part,
The inspection means provided in the injection molding means uses the inner mold as one electrode and the outer mold as the other electrode, and applies a potential difference between the electrodes to inspect the thin portion of the lid portion. .
本発明の成形検査方法は、紙積層包装材料の円筒状スリーブに成形し、射出成形手段でスリーブの頂端に樹脂を射出成形して蓋部を形成し、スリーブの他端の開口から液体食品を充填手段で充填して開口を封止手段で封止して底部を形成し、複合紙容器を得る包装充填システムにおいて、
射出成形手段で、スリーブの他端の開口からスリーブの頂端に、先端が導電性内側金型であるマンドレルをスリーブ内部に嵌め、スリーブの頂端に内側金型を覆う導電性外側金型を配設して蓋部用のキャビィティーを形成し、キャビィティー内部にゲートから溶融樹脂を射出し冷却して薄肉部を有する蓋部を形成し、
射出成形手段に設けられた検査手段で、内側金型を一方の電極とし、外側金型を他方の電極とし、電極間に電位差を印加して蓋部の薄肉部を検査することを特徴とする。
In the molding inspection method of the present invention, a cylindrical sleeve of a paper laminated packaging material is molded, a resin is injection molded on the top end of the sleeve by injection molding means to form a lid, and liquid food is poured from the opening at the other end of the sleeve. In a packaging and filling system that fills with a filling means and seals an opening with a sealing means to form a bottom, and obtains a composite paper container,
By injection molding means, a mandrel whose tip is a conductive inner mold is fitted inside the sleeve from the opening at the other end of the sleeve to the top end of the sleeve, and a conductive outer mold covering the inner mold is disposed at the top end of the sleeve And forming a cavity for the lid part, injecting molten resin from the gate inside the cavity and cooling to form a lid part having a thin part,
The inspection means provided in the injection molding means is characterized in that the inner mold is one electrode, the outer mold is the other electrode, and a thin portion of the lid is inspected by applying a potential difference between the electrodes. .
本発明の包装充填装置は、紙積層包装材料から成形された円筒状スリーブを、スリーブの頂端に樹脂を射出成形して蓋部を形成する射出成形手段と、スリーブの他端の開口から液体食品を充填する充填手段と、開口を封止して底部を形成する封止手段とを有する、複合紙容器を得る包装充填装置において、
射出成形手段が、スリーブの他端の開口からスリーブの頂端にスリーブ内部に嵌められる、先端が導電性内側金型であるマンドレルと、スリーブの頂端に内側金型を覆うように配設されて蓋部用のキャビィティーを形成する導電性外側金型と、キャビィティー内部にゲートから溶融樹脂を射出し冷却して薄肉部を有する蓋部を形成する射出手段とを備え、
射出成形手段が、内側金型を一方の電極とし、外側金型を他方の電極とし、電極間に電位差を印加して蓋部の薄肉部を検査する検査手段を有し、
検査の結果を判断して不良な薄肉部を有するスリーブを、充填手段の上流側で排除する排除手段を有することを特徴とする。
The packaging and filling apparatus of the present invention comprises a cylindrical sleeve molded from a paper laminated packaging material, an injection molding means for forming a lid by injection molding a resin on the top end of the sleeve, and a liquid food from the opening at the other end of the sleeve. In a packaging and filling apparatus for obtaining a composite paper container, comprising: a filling means for filling a container; and a sealing means for sealing an opening to form a bottom.
An injection molding means is fitted inside the sleeve from the opening at the other end of the sleeve to the top end of the sleeve, the mandrel whose tip is a conductive inner mold, and the top end of the sleeve arranged to cover the inner mold and the lid A conductive outer mold for forming a cavity for a part, and injection means for injecting a molten resin from a gate into the cavity and cooling to form a lid part having a thin part,
The injection molding means has an inspection means for inspecting the thin part of the lid portion by applying a potential difference between the electrodes, with the inner mold as one electrode and the outer mold as the other electrode,
It is characterized by having a removing means for judging the result of the inspection and removing the sleeve having a defective thin-walled portion on the upstream side of the filling means.
本発明の包装充填方法は、紙積層包装材料から成形された円筒状スリーブを、射出成形手段で、スリーブの頂端に樹脂を射出成形して蓋部を形成し、スリーブの他端の開口から液体食品を充填手段で充填し、開口を封止手段で封止して底部を形成する、複合紙容器の包装充填方法において、
射出成形手段で、スリーブの他端の開口からスリーブの頂端に先端が導電性内側金型であるマンドレルをスリーブ内部に嵌め、スリーブの頂端に内側金型を覆うように導電性外側金型を配設して蓋部用のキャビィティーを形成し、キャビィティー内部にゲートから溶融樹脂を射出し冷却して薄肉部を有する蓋部を形成し、
射出成形手段で、内側金型を一方の電極とし、外側金型を他方の電極とし、電極間に電位差を印加して蓋部の薄肉部を検査手段で検査し、
検査の結果を判断して不良な薄肉部を有するスリーブを、排除手段で充填手段の上流側で排除することを特徴とする。
In the packaging and filling method of the present invention, a cylindrical sleeve molded from a paper laminated packaging material is formed by injection molding with a resin at the top end of the sleeve to form a lid, and liquid is supplied from the opening at the other end of the sleeve. In the packaging and filling method of the composite paper container, the food is filled with the filling means, and the opening is sealed with the sealing means to form the bottom.
In the injection molding means, a mandrel whose tip is a conductive inner mold is fitted inside the sleeve from the opening at the other end of the sleeve to the top end of the sleeve, and a conductive outer mold is arranged to cover the inner mold at the top end of the sleeve. To form a cavity for the lid part, inject the molten resin from the gate inside the cavity and cool to form a lid part having a thin part,
With injection molding means, the inner mold is one electrode, the outer mold is the other electrode, a potential difference is applied between the electrodes, and the thin part of the lid is inspected by the inspection means,
A sleeve having a defective thin-walled portion is judged based on the result of the inspection, and is excluded by the removing unit on the upstream side of the filling unit.
この発明の好ましい態様において、外側金型が複数個に分割され、組合わされて一体の金型となる。 In a preferred embodiment of the present invention, the outer mold is divided into a plurality of parts and combined to form an integral mold.
この発明の好ましい態様において、薄肉部がストロー孔の予定域及び／又は注ぎ口用弱め線である。 In a preferred embodiment of the present invention, the thin portion is a planned area for the straw hole and / or a weakening line for the spout.
この発明の好ましい態様において、薄肉部が紙製スリーブの頂端と樹脂製蓋部との分離分別用弱め線である。 In a preferred embodiment of the present invention, the thin wall portion is a weak line for separating and separating the top end of the paper sleeve and the resin lid portion.
上記構成の本発明によれば、以下の作用機能を発揮し、有利な効果が得られる。
本発明において、紙積層包装材料から成形された円筒状スリーブを用いる。紙基材／プラスチックの積層体に折目線が付けられたウェブ状包装材料を、容器用寸法の紙片に裁断し、その長手方向の縦線シールにより円筒状のスリーブを得ることができる。
円筒状スリーブは、射出成形手段で、スリーブの頂端に樹脂を射出成形して蓋部が形成され、スリーブの一方、すなわち、頂端側が封鎖される。この発明は、射出成形のステップ後に特徴を有する。
スリーブの一端が封鎖されているので、封鎖されている側を下にして、スリーブの他端を上にして他端の開口から液体食品を充填手段で充填することができる。
開口をヒートシールなどで封止手段で封止（横シール）し、横シールによるフィンやフラップを折畳んで底部を形成する。折畳みは、折目線などを利用して行うことができる。最後に、底部を下になるように回転させて複合紙容器を得ることができる。
According to the present invention having the above configuration, the following functions are exhibited and advantageous effects are obtained.
In the present invention, a cylindrical sleeve formed from a paper laminated packaging material is used. A web-shaped packaging material in which a crease line is formed on a paper base material / plastic laminate can be cut into a paper piece having a container size, and a cylindrical sleeve can be obtained by vertical line sealing in the longitudinal direction.
The cylindrical sleeve is an injection molding means, and a lid is formed by injection molding a resin on the top end of the sleeve, and one side of the sleeve, that is, the top end side is sealed. This invention has features after the injection molding step.
Since one end of the sleeve is sealed, the liquid food can be filled from the opening of the other end with the sealed side down and the other end of the sleeve up.
The opening is sealed with a sealing means such as heat sealing (horizontal sealing), and the fins and flaps by the horizontal sealing are folded to form the bottom. The folding can be performed using a crease line or the like. Finally, the composite paper container can be obtained by rotating the bottom part downward.
本発明において、射出成形手段で、スリーブの他端の開口からスリーブの頂端に先端が導電性内側金型であるマンドレルをスリーブ内部に嵌め、スリーブの頂端に内側金型を覆うように導電性外側金型を配設して蓋部用のキャビィティーを形成し、キャビィティー内部にゲートから溶融樹脂を射出し冷却して薄肉部を有する蓋部を形成することができる。
スリーブの頂端に内側金型を覆うように外側金型を配設するので、溶融樹脂が頂端に到達し頂端と一体化して形成された蓋部と結合しスリーブと蓋部とが一体化することができる。
In the present invention, in the injection molding means, a mandrel whose tip is a conductive inner mold is fitted into the sleeve from the opening at the other end of the sleeve to the top end of the sleeve, and the conductive outer side is so covered as to cover the inner mold at the top end of the sleeve. A cavity for the lid portion can be formed by disposing a mold, and a lid portion having a thin portion can be formed by injecting molten resin from the gate into the cavity and cooling.
Since the outer mold is arranged so as to cover the inner mold at the top end of the sleeve, the molten resin reaches the top end and is combined with the lid portion formed integrally with the top end, so that the sleeve and the lid portion are integrated. Can do.
本発明の特徴において、射出成形手段で、内側金型を一方の電極とし、外側金型を他方の電極とし、電極間に電位差を印加して蓋部の薄肉部を検査手段で検査する。
スリーブが紙／プラスチックの積層体であるので、電気絶縁性であり、また、蓋部が樹脂製（例えば、熱可塑性材料、具体的には、ポリオレフィン（低密度ポリエチレン、高密度ポリエチレン、ポリプロピレンなど））であるので、電気絶縁性であり、電極間に電位差を印加しても、電極間に電流が流れない。非常に狭い幅で成形されていても、金型が蓋部の表面と密着しているために、電極間に電位差を印加する場合、電気容量を持つコンデンサーと見なすことができ、蓋部の厚みやヒビ、ピンホール、空隙の有無などの状態で、その電気容量が変化し、その変化を検査することができる。また、電極間距離が異常に接近して、厚みが許容されない薄さになっている場合、電極間に放電が生じて電流が流れるか否かを検査することもできる。
この発明において、蓋部の状態を電気容量の変化、また電流の流れとして測定して蓋部を検査することができる。とりわけ、蓋部の薄肉部の状態を電気的変化として測定し、薄肉部を検査することができる。
In the feature of the present invention, the injection mold means uses the inner mold as one electrode, the outer mold as the other electrode, applies a potential difference between the electrodes, and inspects the thin part of the lid with the inspection means.
Since the sleeve is a paper / plastic laminate, it is electrically insulating, and the lid is made of resin (for example, thermoplastic material, specifically polyolefin (low density polyethylene, high density polyethylene, polypropylene, etc.) Therefore, even if a potential difference is applied between the electrodes, no current flows between the electrodes. Even if it is molded with a very narrow width, because the mold is in close contact with the surface of the lid, if a potential difference is applied between the electrodes, it can be regarded as a capacitor with an electric capacity, and the thickness of the lid The capacitance changes in the presence or absence of cracks, pinholes, voids, etc., and the change can be inspected. Further, when the distance between the electrodes is abnormally close and the thickness is not allowed to be thin, it is possible to inspect whether or not a current flows due to discharge between the electrodes.
In the present invention, the lid can be inspected by measuring the state of the lid as a change in electric capacity or a current flow. In particular, the thin portion of the lid can be measured as an electrical change to inspect the thin portion.
本発明の特徴において、検査の結果を判断して不良な薄肉部を有するスリーブを、排除手段で充填手段の上流側で排除する。
蓋部の薄肉部の状態を電気的変化として測定し、薄肉部での異常な厚み（設計された厚みよりも太い場合や薄い場合）、ヒビ、ピンホール、空隙の有無を検査することができる。
液体食品を充填する前に、不良なスリーブを排除することができるので、液体食品を無用に廃棄することを回避することができ、製造コストを下げることができ、また、環境負荷を低減することもできる。
In the feature of the present invention, the sleeve having a defective thin portion is judged on the upstream side of the filling means by judging the result of the inspection.
Measures the state of the thin part of the lid as an electrical change, and can inspect the presence of abnormal thickness (if thicker or thinner than the designed thickness), cracks, pinholes, and voids in the thin part .
Since the bad sleeve can be eliminated before filling with liquid food, it is possible to avoid unnecessary disposal of liquid food, reduce the manufacturing cost, and reduce the environmental load You can also.
上述のように、本発明は、複合紙容器の蓋部の開口部／薄肉部の検査を、非常に狭い幅で成形される脆化部や開口部／薄肉部の測定であっても、検査の信頼性が高く、インラインで非破壊検査することができて、製品が無駄にならず、製造コストを下げることができる成形検査装置、成形検査方法、包装充填装置及び包装充填方法を提供することができる。 As described above, the present invention is capable of inspecting the opening / thin wall portion of the lid portion of the composite paper container even when measuring an embrittled portion or an opening / thin wall portion formed with a very narrow width. The present invention provides a molding inspection apparatus, a molding inspection method, a packaging filling apparatus, and a packaging filling method that are highly reliable, can be in-line nondestructively inspected, do not waste products, and can reduce manufacturing costs. Can do.
以下、本発明の実施の形態について図面を参照しながら詳細に説明する。
本発明による実施形態の包装充填装置のブロック図を図１に示す。この例では、リール状のウェブ紙積層包装材料１から成形された円筒状スリーブ２を、スリーブの頂端２ａに樹脂を射出成形して蓋部３を形成する射出成形手段４と、スリーブの他端２ｂの開口から液体食品を充填する充填手段５と、開口を封止して底部を形成する封止手段６とを有する。図３に示すような複合紙容器２０を得る。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
A block diagram of a packaging and filling apparatus according to an embodiment of the present invention is shown in FIG. In this example, a cylindrical sleeve 2 formed from a reel-shaped web paper laminated packaging material 1 is formed by injection molding means 4 for forming a lid portion 3 by injection molding a resin on the top end 2a of the sleeve, and the other end of the sleeve. It has the filling means 5 which fills liquid food from the opening of 2b, and the sealing means 6 which seals an opening and forms a bottom part. A composite paper container 20 as shown in FIG. 3 is obtained.
この実施形態において、紙積層包装材料１から成形された円筒状スリーブ２を用いる。紙基材／プラスチックの積層体に折目線が付けられたウェブ状包装材料１をリールから繰り出し、、容器用寸法の紙片に裁断し、その長手方向の縦線シールにより円筒状のスリーブ２を得る。
円筒状スリーブ２は、射出成形手段４で、スリーブの頂端２ａに樹脂を射出成形して蓋部３が形成され、スリーブ２の一方２ａ、すなわち、頂端側が封鎖される。
スリーブの一端２ａ封鎖されているので、封鎖されている側を下にして、スリーブの他端２ｂを上にして他端の開口から液体食品を充填手段５で充填する。
開口２ｂをヒートシールの封止手段６で封止（横シール）し、横シールによるフィンやフラップを折畳んで底部２ｂを形成する。図中には、倒立の複合紙容器２０を示す。折畳みは、折目線などを利用して行う。最後に、底部を下になるように回転させて正立の複合紙容器２０を得る。
In this embodiment, a cylindrical sleeve 2 formed from the paper laminate packaging material 1 is used. The web-shaped packaging material 1 in which a crease line is attached to a paper base material / plastic laminate is unwound from a reel, cut into a paper piece of a container size, and a cylindrical sleeve 2 is obtained by a longitudinal line seal in the longitudinal direction. .
The cylindrical sleeve 2 is injection-molding means 4, and a lid 3 is formed by injection-molding resin on the top end 2 a of the sleeve, and one end 2 a of the sleeve 2, that is, the top end side is sealed.
Since one end 2a of the sleeve is sealed, the filling means 5 fills the liquid food from the opening at the other end with the other end 2b of the sleeve facing up.
The opening 2b is sealed (horizontal seal) with a heat seal sealing means 6 and the bottom 2b is formed by folding the fins and flaps by the horizontal seal. In the figure, an inverted composite paper container 20 is shown. Folding is done using fold lines. Finally, the erect composite paper container 20 is obtained by rotating the bottom part downward.
図2に示すように、射出成形手段４が、倒立したスリーブの他端２ｂの開口からスリーブの頂端２ａにスリーブ内部に嵌められる、先端が導電性内側金型であるマンドレル７と、スリーブの頂端に内側金型７を覆うように配設されて蓋部用のキャビィティー８を形成する導電性外側金型９と、キャビィティー内部にゲート１０から溶融樹脂を射出し冷却して薄肉部を有する蓋部３を形成する射出手段（図示せず）とを備える。
スリーブ２の頂端２ａに内側金型７を覆うように外側金型９ａ、９ｂを配設するので、溶融樹脂が頂端２ａに到達し頂端２ａと一体化して形成された蓋部３と結合しスリーブ２と蓋部３とが一体化する。
この例において、外側金型９が２個に分割され、組合わされて一体の金型となる。複数個に分割することで、複雑な形状の蓋部を形成することができる。
As shown in FIG. 2, the injection molding means 4 is fitted inside the sleeve to the top end 2a of the sleeve from the opening of the other end 2b of the inverted sleeve, and the mandrel 7 whose tip is a conductive inner mold, and the top end of the sleeve A conductive outer mold 9 which is disposed so as to cover the inner mold 7 to form a cavity 8 for the lid, and has a thin part by injecting molten resin from the gate 10 into the cavity and cooling it. And injection means (not shown) for forming the lid 3.
Since the outer molds 9a and 9b are disposed so as to cover the inner mold 7 at the top end 2a of the sleeve 2, the molten resin reaches the top end 2a and is joined to the lid 3 formed integrally with the top end 2a. 2 and the lid 3 are integrated.
In this example, the outer mold 9 is divided into two parts and combined to form an integral mold. By dividing into a plurality of parts, a cover portion having a complicated shape can be formed.
この実施形態において、蓋部の成形後、直ちに蓋部を保持したまま、射出成形手段４では、内側金型７を一方の電極とし、外側金型９ａ、９ｂを他方の電極とし、電極間に電位差を電源から印加して蓋部３の薄肉部を検査手段１１で検査する。
スリーブ２が紙／プラスチック積層体であるので、電気絶縁性であり、また、蓋部がポリエチレンであるので、電気絶縁性であり、検査手段１１で電極間に電位差を印加しても、電極間に電流が流れないが、非常に狭い幅、又は薄く成形されていても、金型が蓋部の表面と密着しているために、電極間に電位差を印加すると、電気容量を持つコンデンサーと見なすことができ、蓋部の厚みやヒビ、ピンホール、空隙の有無などの状態で、その電気容量が変化し、その変化を検査する。また、放電の有無を検査する。
この態様において、蓋部３の状態を電気容量の変化、通電の有無として測定して蓋部３を検査し、特に、蓋部の薄肉部の状態を電気的変化として測定し、薄肉部を検査する。
In this embodiment, the injection molding means 4 uses the inner mold 7 as one electrode and the outer molds 9a and 9b as the other electrode while holding the lid immediately after molding the lid, and between the electrodes. A potential difference is applied from a power source, and the thin portion of the lid 3 is inspected by the inspection means 11.
Since the sleeve 2 is a paper / plastic laminate, it is electrically insulative, and since the lid is polyethylene, it is electrically insulative. No current flows through the capacitor, but even if it is very narrow or thin, the mold is in close contact with the surface of the lid. The electric capacity changes depending on the thickness of the lid, cracks, pinholes, presence or absence of voids, and the change is inspected. Also, the presence or absence of discharge is inspected.
In this embodiment, the state of the lid 3 is measured as a change in electric capacity, whether or not electricity is applied, and the lid 3 is inspected. In particular, the state of the thin portion of the lid is measured as an electrical change, and the thin portion is inspected. To do.
図３に示す複合紙包装容器２０において、蓋部３の薄肉部は、プルタブ２１を引き上げて注ぎ口を形成する弱め線２２である。
この形態以外に、薄肉部を、ストロー孔の予定域、薄肉部が紙製スリーブの頂端と樹脂製蓋部との分離分別用弱め線とすることもできる。
In the composite paper packaging container 20 shown in FIG. 3, the thin portion of the lid 3 is a weak line 22 that pulls up the pull tab 21 to form a spout.
In addition to this form, the thin portion may be a planned area of the straw hole, and the thin portion may be a weakening line for separating and separating the top end of the paper sleeve and the resin lid portion.
この実施形態において、図１に示すように、検査の結果を判断して不良な薄肉部を有するスリーブを、充填手段５の上流側で排除する排除手段１２を有する。
蓋部３の薄肉部２２の状態を電気的変化として測定し、薄肉部２２での異常な厚み（設計された厚みよりも太い場合や薄い場合）、ヒビ、ピンホール、空隙の有無を検査する。
液体食品を充填する前に、不良なスリーブを排除し、液体食品を無用に廃棄することを回避し、製造コストを下げ、環境負荷を低減する。
In this embodiment, as shown in FIG. 1, there is an exclusion means 12 that judges the result of the inspection and excludes a sleeve having a defective thin wall portion on the upstream side of the filling means 5.
Measure the state of the thin portion 22 of the lid 3 as an electrical change, and inspect the thin portion 22 for abnormal thickness (if thicker or thinner than the designed thickness), cracks, pinholes, and voids. .
Eliminate defective sleeves before filling with liquid food, avoid wasteful disposal of liquid food, reduce manufacturing costs and reduce environmental impact.
上述に実証されるように、複合紙容器の蓋部の開口部／薄肉部の検査を、非常に狭い幅で成形される脆化部や開口部／薄肉部の測定であっても、検査の信頼性が高く、インラインで非破壊検査することができて、製品が無駄にならず、製造コストを下げる。 As demonstrated above, the inspection of the opening / thin wall portion of the lid of the composite paper container can be performed even when measuring an embrittled portion or an opening / thin wall portion formed with a very narrow width. Reliable and non-destructive inspection can be performed in-line, so that products are not wasted and manufacturing costs are reduced.
なお、本発明は前記実施の形態に限定されるものではなく、本発明の趣旨に基づいて種々変形させることが可能であり、それらを本発明の範囲から排除するものではない。 In addition, this invention is not limited to the said embodiment, It can change variously based on the meaning of this invention, and does not exclude them from the scope of the present invention.
この発明は、液体食品の包装容器に適用することができる。 The present invention can be applied to a packaging container for liquid food.
２ スリーブ
３ 蓋部
４ 射出成形手段
５ 充填手段
６ 封止手段
７ 内側金型
９ 外側金型
１１ 検査手段
１２ 排除手段
２０ 複合紙容器
２２ 薄肉部
2 Sleeve 3 Lid 4 Injection molding means 5 Filling means 6 Sealing means 7 Inner mold 9 Outer mold 11 Inspection means 12 Exclusion means 20 Composite paper container 22 Thin wall portion
Claims (7)
該射出成形手段が、該スリーブの他端の開口から該スリーブの頂端に、先端が導電性内側金型であるマンドレルをスリーブ内部に嵌め、該スリーブの頂端に該内側金型を覆う導電性外側金型を配設して蓋部用のキャビィティーを形成し、該キャビィティー内部にゲートから溶融樹脂を射出し冷却して薄肉部を有する該蓋部を形成し、
該射出成形手段に設けられた検査手段が、該内側金型を一方の電極とし、該外側金型を他方の電極とし、電極間に電位差を印加して該蓋部の該薄肉部を検査することを特徴とする成形検査装置。 A cylindrical sleeve formed from a paper laminated packaging material; an injection molding means for forming a lid portion by injection molding a resin on the top end of the sleeve; and a filling means for filling liquid food from the opening at the other end of the sleeve; A packaging and filling system for obtaining a composite paper container having sealing means for sealing the opening to form a bottom.
The injection molding means fits a mandrel whose tip is a conductive inner mold from the opening at the other end of the sleeve to the top end of the sleeve, and the conductive outer side covering the inner mold at the top end of the sleeve. A mold is provided to form a cavity for the lid, and a molten resin is injected into the cavity from the gate and cooled to form the lid having a thin portion,
Inspection means provided in the injection molding means uses the inner mold as one electrode and the outer mold as the other electrode, and inspects the thin portion of the lid portion by applying a potential difference between the electrodes. A molding inspection apparatus characterized by that.
該射出成形手段で、該スリーブの他端の開口から該スリーブの頂端に、先端が導電性内側金型であるマンドレルを該スリーブ内部に嵌め、該スリーブの頂端に該内側金型を覆う導電性外側金型を配設して蓋部用のキャビィティーを形成し、該キャビィティー内部にゲートから溶融樹脂を射出し冷却して薄肉部を有する該蓋部を形成し、
該射出成形手段に設けられた検査手段で、該内側金型を一方の電極とし、該外側金型を他方の電極とし、電極間に電位差を印加して該蓋部の薄肉部を検査することを特徴とする成形検査方法。 Molded into a cylindrical sleeve of paper laminate packaging material, injection molded means with resin injection molded at the top end of the sleeve to form a lid, and filled with liquid food from the other end opening of the sleeve with filling means In the packaging and filling system in which the opening is sealed with a sealing means to form the bottom, and a composite paper container is obtained,
In the injection molding means, a mandrel whose tip is a conductive inner mold is fitted into the sleeve from the opening at the other end of the sleeve to the top end of the sleeve, and the conductive material is covered with the inner mold at the top end of the sleeve. An outer mold is provided to form a cavity for the lid part, and the lid part having a thin part is formed by injecting molten resin from the gate into the cavity and cooling it,
The inspection means provided in the injection molding means uses the inner mold as one electrode, the outer mold as the other electrode, and applies a potential difference between the electrodes to inspect the thin portion of the lid portion. Molding inspection method characterized by.
該射出成形手段が、該スリーブの他端の開口から該スリーブの頂端に該スリーブ内部に嵌められる、先端が導電性内側金型であるマンドレルと、該スリーブの頂端に該内側金型を覆うように配設されて蓋部用のキャビィティーを形成する導電性外側金型と、該キャビィティー内部にゲートから溶融樹脂を射出し冷却して薄肉部を有する該蓋部を形成する射出手段とを備え、
該射出成形手段が、該内側金型を一方の電極とし、該外側金型を他方の電極とし、電極間に電位差を印加して該蓋部の薄肉部を検査する検査手段を有し、
検査の結果を判断して不良な薄肉部を有する該スリーブを、該充填手段の上流側で排除する排除手段を有することを特徴とする包装充填装置。 A cylindrical sleeve formed from a paper laminated packaging material; an injection molding means for forming a lid portion by injection molding a resin on the top end of the sleeve; and a filling means for filling liquid food from the opening at the other end of the sleeve; In a packaging and filling apparatus for obtaining a composite paper container, having a sealing means for sealing the opening to form a bottom portion,
The injection molding means is fitted inside the sleeve from the opening at the other end of the sleeve to the top end of the sleeve, and a mandrel whose tip is a conductive inner mold, and the inner mold is covered at the top end of the sleeve. A conductive outer mold which is disposed in the cavity and forms a cavity for the lid, and an injection means for injecting molten resin from the gate into the cavity and cooling to form the lid having a thin portion Prepared,
The injection molding means has the inner mold as one electrode, the outer mold as the other electrode, and has an inspection means for inspecting the thin portion of the lid portion by applying a potential difference between the electrodes;
A packaging and filling apparatus comprising: an exclusion means for judging the result of the inspection and removing the sleeve having a defective thin-walled portion on the upstream side of the filling means.
該射出成形手段で、該スリーブの他端の開口から該スリーブの頂端に先端が導電性内側金型であるマンドレルをスリーブ内部に嵌め、該スリーブの頂端に該内側金型を覆うように導電性外側金型を配設して蓋部用のキャビィティーを形成し、該キャビィティー内部にゲートから溶融樹脂を射出し冷却して薄肉部を有する該蓋部を形成し、
該射出成形手段で、該内側金型を一方の電極とし、該外側金型を他方の電極とし、電極間に電位差を印加して該蓋部の薄肉部を検査手段で検査し、
検査の結果を判断して不良な薄肉部を有するスリーブを、排除手段で該充填手段の上流側で排除することを特徴とする包装充填方法。 A cylindrical sleeve formed from paper laminate packaging material is injection-molded with a resin at the top end of the sleeve to form a lid, and filled with liquid food from the other end of the sleeve. In the method of packaging and filling a composite paper container, the bottom is formed by sealing the opening with a sealing means.
In the injection molding means, a mandrel whose tip is a conductive inner mold is fitted into the sleeve from the opening at the other end of the sleeve to the top end of the sleeve, and the conductive material is covered so as to cover the inner mold at the top end of the sleeve. An outer mold is provided to form a cavity for the lid part, and the lid part having a thin part is formed by injecting molten resin from the gate into the cavity and cooling it,
With the injection molding means, the inner mold is one electrode, the outer mold is the other electrode, a potential difference is applied between the electrodes, and the thin part of the lid is inspected by the inspection means,
A packaging and filling method characterized in that a sleeve having a defective thin-walled portion is judged on the upstream side of the filling means by judging the result of the inspection.
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