JP2007144985A - Lid of container and its molding method - Google Patents

Lid of container and its molding method Download PDF

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Publication number
JP2007144985A
JP2007144985A JP2006183264A JP2006183264A JP2007144985A JP 2007144985 A JP2007144985 A JP 2007144985A JP 2006183264 A JP2006183264 A JP 2006183264A JP 2006183264 A JP2006183264 A JP 2006183264A JP 2007144985 A JP2007144985 A JP 2007144985A
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Prior art keywords
mold
lid
container
sheet material
synthetic resin
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Japanese (ja)
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Makoto Naganuma
誠 長沼
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Aska Co
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Aska Co
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C45/00Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/14Injection 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
    • B29C2045/1486Details, accessories and auxiliary operations
    • B29C2045/14901Coating a sheet-like insert smaller than the dimensions of the adjacent mould wall
    • B29C2045/14918Coating a sheet-like insert smaller than the dimensions of the adjacent mould wall in-mould-labelling

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lid of a container, the entire outer wall surface of which can be simply decorated with a pattern, a photograph, etc., without causing a positional deviation, a deflection, creases, etc. and a method for molding the lid of the container. <P>SOLUTION: This molding method is to laminate a sheet material 4 on the lid 6 of the container from the upper surface of a top part 6a to a side wall part 6b. A plurality of cuts 4a are formed at an appropriate interval over the outer periphery of the sheet material 4, then the sheet material 4 is loaded in an outer surface mold 2b corresponding to the shape of the lid 6 of the container and separated from the outer surface mold 2b, and a synthetic resin material is injected from a core 1 to mold the lid 6. The method for molding the lid 6 of the container is provided. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、主にヨーグルトやアイスクリームなどの内容物が入った容器の蓋並びにその成形方法に関するものである。 The present invention relates to a lid of a container mainly containing contents such as yogurt and ice cream, and a molding method thereof.

フラットな天板で鮮明な印刷ができて、嵌合係止の容易な紙蓋として、特許文献1に記載の外面に合成樹脂層の加工を施した紙材からなる天板の外周部に放射方向の切込みを入れ、切込みにて細分化した側片を下向きに屈曲した蓋と、印刷が可能な紙の外周部に折込み線を設け折込み線に沿って下向きに屈曲する側壁を形成した装飾紙を前記側壁と前記天板側片の一部が着設することで、前記側壁に逆テーパーを成す周壁を形成する提案がされている。 As a paper lid that can be clearly printed on a flat top plate and can be easily fitted and locked, it radiates to the outer periphery of the top plate made of a paper material having a synthetic resin layer processed on the outer surface described in Patent Document 1. Decorative paper with a cut in the direction, a lid that is bent downward on the side pieces that are subdivided by the cut, and a side wall that is bent downward along the fold line by providing a fold line on the outer periphery of the printable paper Has been proposed to form a peripheral wall having a reverse taper on the side wall by attaching a part of the side wall and the top plate side piece.

また、容器との嵌合が確実で、外れにくく、取り扱いが便利な紙の蓋を簡単に製造する方法と装置として、特許文献2に記載の一枚の紙から天板と周側部とを一体に成形する製法技術であって、前記周側部に下方に開いた溝部を形成し、前記溝部の外壁の内周面に凸部を形成した紙の蓋とその製法及びその製造装置が提案されている。 Further, as a method and apparatus for easily manufacturing a paper lid that is surely fitted to a container, is difficult to come off, and is easy to handle, a top plate and a peripheral side portion are formed from a piece of paper described in Patent Document 2. A manufacturing technique for forming integrally, a paper lid in which a groove portion opened downward in the peripheral side portion is formed, and a convex portion is formed on the inner peripheral surface of the outer wall of the groove portion, a manufacturing method thereof, and a manufacturing apparatus thereof are proposed. Has been.

更に、ラベルの表面に皺を生じないようにし、かつラベルの接着性をも向上させるインモールドインジェクション成形品として、特許文献3に記載の成形体側の表面に凹凸状のスリットを形成し成形体の表面に溶着されたラベルに生じる皺を吸収するような構成のインモールドインジェクション成形品が提案されている。 Furthermore, as an in-mold injection molded product that prevents wrinkles on the surface of the label and also improves the adhesiveness of the label, an uneven slit is formed on the surface of the molded body described in Patent Document 3, and There has been proposed an in-mold injection molded article configured to absorb wrinkles generated on a label welded to the surface.

また、プラスチック樹脂容器を成形する時に、成形加工と同時にラベルを成形品の底部と胴部に貼り合わせるインモールドラベルとして、特許文献4に記載のインモールド用ラベルの底部と胴部をつなぐつなぎ部の胴部方向両端縁が胴部下部縁と略直角に形成したインモールド用ラベルが提案させている。 In addition, when molding a plastic resin container, as an in-mold label that bonds the label to the bottom and body of the molded product at the same time as the molding process, a joint that connects the bottom and body of the in-mold label described in Patent Document 4 An in-mold label is proposed in which both end edges in the body part direction are formed substantially at right angles to the lower edge of the body part.

実開平4−71610号公報Japanese Utility Model Publication No. 4-71610 特開平8−156955号公報JP-A-8-156955 特開平6−156517号公報JP-A-6-156517 特開2005−283978号公報JP 2005-283978 A

特許文献1及び特許文献2に記載の紙蓋では、材質が紙材であるため例えば気密性を有する粉ミルクやインスタントコーヒー等の湿気進入を防止する必要がある内容物が入った容器の蓋には使用することができない。また、材質が紙材であるため外部からの軽い衝撃にも変形してしまう特性を有していた。さらに、前記蓋の側片を下向きに屈曲させた時にどの側片も同じ角度に屈曲させておかなければ、装飾紙と着設する際に前記蓋と装飾紙がうまく着設されずに、装飾紙がずれて蓋へ着設されてしまったり、装飾紙にたわみやしわ等が発生したり、また、前記側片の切込みの間に隙間が発生した状態で装飾紙を着設してしまったりと、適正な形状や品質を形成することが困難である。 In the paper lids described in Patent Literature 1 and Patent Literature 2, since the material is paper material, for example, the lid of a container containing contents that need to prevent moisture ingress such as airtight powdered milk or instant coffee is included. Cannot be used. Further, since the material is paper, it has a characteristic of being deformed even by a light impact from the outside. Further, if the side pieces of the lid are bent downward, if the side pieces are not bent at the same angle, the lid and the decorative paper are not properly attached when the decorative paper is attached. The paper slips and is attached to the lid, the decorative paper is bent or wrinkled, or the decorative paper is attached with a gap between the cuts on the side pieces. It is difficult to form an appropriate shape and quality.

特許文献3に記載のインモールドインジェクション成形品では、成形体側の表面を凹凸状のスリットを形成することで、前記成形体の表面に溶着された成形用ラベルに生じる皺を吸収する構造であるが、前記スリットは射出樹脂の流動方向と平行で発生しようとする皺に類似した形状の条溝であるので、表面の細かな凹凸がある状態でラベルが溶着されることになり、店頭などに陳列された際の照明のあたり具合で、光の屈折が生じラベル表面に印刷された文字や絵等が見えにくくなる場合が発生する。また、ラベル溶着による加飾については、天板のみであるので加飾性には劣る。 The in-mold injection-molded article described in Patent Document 3 has a structure that absorbs wrinkles generated on a molding label welded to the surface of the molded body by forming an uneven slit on the surface of the molded body. Since the slit is a groove having a shape similar to a wrinkle to be generated parallel to the flow direction of the injection resin, the label is welded in a state where there are fine irregularities on the surface, and is displayed at a storefront or the like. Depending on the lighting condition, the light may be refracted and characters or pictures printed on the label surface may become difficult to see. Moreover, about decorating by label welding, since it is only a top plate, it is inferior to decorating property.

特許文献4に記載のインモールド用ラベルでは、樹脂が射出される前に、金型内へインモールド用ラベルを容器形状と類似に折り曲げた状態にして雌型内へ設置する必要があり、ラベルを雌型内に設置するまでの工程が非常に手間となる。また、ラベルを雌型内に設置した時に正確な位置に設置できていなかった場合、ラベルがずれた状態で成形されたり、ラベルに皺が入る場合があるので、安定的に同じ品質のものを生産するには困難さがある。 In the in-mold label described in Patent Document 4, before the resin is injected, the in-mold label needs to be installed in a female mold in a state of being bent in a similar manner to the container shape. The process up to installation in the female mold is very troublesome. Also, if the label is not placed in the correct position when it is installed in the female mold, it may be molded with the label out of position or wrinkles may enter the label. There are difficulties in production.

本発明の目的は、上記課題を解決し、容器の蓋の外径全面に模様や写真などの加飾を位置ずれやたわみ、しわなどを発生させずに簡単に施すことができる容器の蓋の成形方法と容器の蓋を提供することである。 The object of the present invention is to solve the above-mentioned problems, and to provide a container lid that can be easily decorated without causing misalignment, deflection, wrinkles, etc. A molding method and a container lid are provided.

本発明は、上面に突出したリブ部を有する天板部を底とし、前記天板部の外周から下端へ延出した側壁部とした合成樹脂材でできた容器の蓋に前記天板部の上面から側壁部に至って合成樹脂材のシート材を貼りつける成形方法において、前記シート材を前記容器の蓋の表面形状に対応する外面型に載置して蓋形状に一次成形後、キャビ型とコア型が突き合って金型が型締めして、前記コア型から合成樹脂材を注入して成形する容器の蓋の成形方法である。   The present invention provides a lid of a container made of a synthetic resin material having a top plate portion having a rib portion protruding from the upper surface as a bottom and a side wall portion extending from the outer periphery to the lower end of the top plate portion. In the molding method in which the sheet material of the synthetic resin material is attached from the upper surface to the side wall portion, the sheet material is placed on the outer surface mold corresponding to the surface shape of the lid of the container, and after the primary molding into the lid shape, This is a method for forming a lid of a container in which a core mold is abutted and a mold is clamped, and a synthetic resin material is injected from the core mold and molded.

また、本発明は、上面に突出したリブ部を有する天板部を底とし、前記天板部の外周から下端へ延出した側壁部とした合成樹脂材でできた容器の蓋に前記天板部の上面から側壁部に至って合成樹脂材のシート材を貼りつける成形方法において、前記シート材を前記容器の蓋の裏面形状に対応する内面型に載置して後、キャビ型とコア型が突き合って金型が型締めして、前記シート材を容器の蓋形状に一次成形後、コア型から合成樹脂材を注入して成形する容器の蓋の成形方法である。 Further, the present invention provides the top plate on a lid of a container made of a synthetic resin material having a top plate portion having a rib portion protruding from the upper surface as a bottom and a side wall portion extending from the outer periphery to the lower end of the top plate portion. In the molding method in which the sheet material of the synthetic resin material is attached from the upper surface of the portion to the side wall portion, after the sheet material is placed on the inner surface mold corresponding to the back surface shape of the lid of the container, the mold and the core mold are This is a container lid molding method in which a mold is clamped against each other, the sheet material is primarily molded into a container lid shape, and then a synthetic resin material is injected from a core mold and molded.

更に、本発明は、上面に突出したリブ部を有する天板部を底とし、前記天板部の外周から下端へ延出した側壁部とした合成樹脂材でできた容器の蓋に前記天板部の上面から側壁部に至って合成樹脂材のシート材を貼りつける容器の蓋において、前記シート材を前記容器の蓋の表面形状に対応する外面型に載置して蓋形状に一次成形後、キャビ型とコア型が突き合って金型が型締めして、前記コア型から合成樹脂材を注入して成形する容器の蓋である。 Further, the present invention provides the top plate on the lid of a container made of a synthetic resin material having a top plate portion having a rib portion protruding from the upper surface as a bottom and a side wall portion extending from the outer periphery to the lower end of the top plate portion. In the lid of the container to which the sheet material of the synthetic resin material is attached from the upper surface of the part to the side wall part, the sheet material is placed on the outer surface mold corresponding to the surface shape of the lid of the container, and after the primary molding into the lid shape, This is a lid of a container that is molded by injecting a synthetic resin material from the core mold after the mold mold and the core mold face each other and the mold is clamped.

また、本発明は、上面に突出したリブ部を有する天板部を底とし、前記天板部の外周から下端へ延出した側壁部とした合成樹脂材でできた容器の蓋に前記天板部の上面から側壁部に至って合成樹脂材のシート材を貼りつける容器の蓋において、前記シート材を前記容器の蓋の裏面形状に対応する内面型に載置して後、キャビ型とコア型が突き合って金型が型締めして、前記シート材を容器の蓋形状に一次成形後、コア型から合成樹脂材を注入して成形する容器の蓋である。 Further, the present invention provides the top plate on a lid of a container made of a synthetic resin material having a top plate portion having a rib portion protruding from the upper surface as a bottom and a side wall portion extending from the outer periphery to the lower end of the top plate portion. In the lid of the container for attaching the synthetic resin sheet material from the upper surface of the container to the side wall, after placing the sheet material on the inner surface mold corresponding to the back surface shape of the container lid, the mold and the core mold And the mold is clamped, and after the sheet material is first molded into a lid shape of the container, a synthetic resin material is injected from the core mold and molded.

本発明は、上面に突出したリブ部を有する天板部を底とし、前記天板部の外周から下端へ延出した側壁部とした合成樹脂材でできた容器の蓋に前記天板部の上面から側壁部に至って合成樹脂材のシート材を貼りつける成形方法において、前記シート材を前記容器の蓋の表面形状に対応する外面型に載置して蓋形状に一次成形後、キャビ型とコア型が突き合って金型が型締めして、前記コア型から合成樹脂材を注入して成形する容器の蓋の成形方法であるので、容器の蓋の外径全面に模様や写真などの加飾を位置ずれやたわみ、しわなどを発生させずに簡単に施すことができる容器の蓋の成形方法である。 The present invention provides a lid of a container made of a synthetic resin material having a top plate portion having a rib portion protruding from the upper surface as a bottom and a side wall portion extending from the outer periphery to the lower end of the top plate portion. In the molding method in which the sheet material of the synthetic resin material is attached from the upper surface to the side wall portion, the sheet material is placed on the outer surface mold corresponding to the surface shape of the lid of the container, and after the primary molding into the lid shape, This is a container lid molding method in which the core mold is abutted and the mold is clamped, and a synthetic resin material is injected from the core mold to mold the container lid. This is a method for forming a lid of a container that can be easily decorated without causing misalignment, deflection, wrinkles and the like.

また、本発明は、上面に突出したリブ部を有する天板部を底とし、前記天板部の外周から下端へ延出した側壁部とした合成樹脂材でできた容器の蓋に前記天板部の上面から側壁部に至って合成樹脂材のシート材を貼りつける成形方法において、前記シート材を前記容器の蓋の裏面形状に対応する内面型に載置して後、キャビ型とコア型が突き合って金型が型締めして、前記シート材を容器の蓋形状に一次成形後、コア型から合成樹脂材を注入して成形する容器の蓋の成形方法であるので、容器の蓋の外径全面に模様や写真などの加飾を位置ずれやたわみ、しわなどを発生させずに簡単に施すことができる容器の蓋の成形方法である。 Further, the present invention provides the top plate on a lid of a container made of a synthetic resin material having a top plate portion having a rib portion protruding from the upper surface as a bottom and a side wall portion extending from the outer periphery to the lower end of the top plate portion. In the molding method in which the sheet material of the synthetic resin material is attached from the upper surface of the portion to the side wall portion, after the sheet material is placed on the inner surface mold corresponding to the back surface shape of the lid of the container, the mold and the core mold are Since the mold is clamped and the sheet material is primary-molded into a container lid shape, a synthetic resin material is injected from the core mold to mold the container lid. This is a method for forming a lid of a container that can be easily applied with decoration such as a pattern or a photo on the entire outer diameter without causing misalignment, deflection, or wrinkles.

更に、本発明は、上面に突出したリブ部を有する天板部を底とし、前記天板部の外周から下端へ延出した側壁部とした合成樹脂材でできた容器の蓋に前記天板部の上面から側壁部に至って合成樹脂材のシート材を貼りつける容器の蓋において、前記シート材を前記容器の蓋の表面形状に対応する外面型に載置して蓋形状に一次成形後、キャビ型とコア型が突き合って金型が型締めして、前記コア型から合成樹脂材を注入して成形する容器の蓋であるので、容器の蓋の外径全面に模様や写真などの加飾を位置ずれやたわみ、しわなどを発生させずに簡単に施すことができる容器の蓋である。 Further, the present invention provides the top plate on the lid of a container made of a synthetic resin material having a top plate portion having a rib portion protruding from the upper surface as a bottom and a side wall portion extending from the outer periphery to the lower end of the top plate portion. In the lid of the container to which the sheet material of the synthetic resin material is attached from the upper surface of the part to the side wall part, the sheet material is placed on the outer surface mold corresponding to the surface shape of the lid of the container, and after the primary molding into the lid shape, Since the mold is clamped with the mold and the mold, the mold is clamped, and a synthetic resin material is injected from the core mold to form the lid of the container. It is a container lid that can be easily decorated without causing misalignment, deflection, wrinkles and the like.

また、上面に突出したリブ部を有する天板部を底とし、前記天板部の外周から下端へ延出した側壁部とした合成樹脂材でできた容器の蓋に前記天板部の上面から側壁部に至って合成樹脂材のシート材を貼りつける容器の蓋において、前記シート材を前記容器の蓋の裏面形状に対応する内面型に載置して後、キャビ型とコア型が突き合って金型が型締めして、前記シート材を容器の蓋形状に一次成形後、コア型から合成樹脂材を注入して成形する容器の蓋であるので、容器の蓋の外径全面に模様や写真などの加飾を位置ずれやたわみ、しわなどを発生させずに簡単に施すことができる容器の蓋である。 In addition, the top of the top plate having a rib portion protruding from the upper surface is used as a bottom, and the lid of the container made of a synthetic resin material is used as a side wall extending from the outer periphery to the lower end of the top plate from the upper surface of the top plate. In the lid of the container to which the sheet material of the synthetic resin material is adhered to the side wall portion, after the sheet material is placed on the inner surface mold corresponding to the back surface shape of the container lid, the mold mold and the core mold face each other. Since the mold is clamped and the sheet material is first molded into the shape of a container lid, and then the synthetic resin material is injected from the core mold and molded, the pattern on the entire outer diameter of the container lid This is a container lid that can be easily decorated without causing misalignment, deflection, wrinkles, etc.

図1乃至図7において、本発明の容器の蓋6は、上面に突出した環状などのリブ部6cを有する天板部6aを底とし、前記天板部6aの外周から下端へ延出した側壁部6bとしたポリプロピレンやポリエチレンなどの合成樹脂材でできた容器の蓋6に前記天板部6aの上面から側壁部6bに至ってユポシートやユポシートと同調する素材を使用した合成樹脂材のシート材4を貼りつけたものである。また、前記シート材4の外周に切り目4aを適宜間隔で複数個形成して、前記シート材4を前記容器の蓋6の表面形状に対応する外面型2bに載置して蓋形状に一次成形後、キャビ型2とコア型1が突き合って金型が型締めして、前記コア型1から合成樹脂材を注入して成形した容器の蓋6であるので、前記容器の蓋6の外径全面に模様や写真などの加飾を位置ずれやたわみ、しわなどを発生させずに簡単に施すことが可能な容器の蓋6と容器の蓋6の成形方法である。尚、外径全面とは、容器の蓋6の天板部6aと側壁部6bを合わせた面のことである。 1 to 7, the lid 6 of the container of the present invention has a top plate portion 6a having an annular rib portion 6c protruding from the upper surface, and a side wall extending from the outer periphery to the lower end of the top plate portion 6a. Synthetic resin sheet material 4 using a material that synchronizes with the YUPO sheet or YUPO sheet from the top surface of the top plate portion 6a to the side wall portion 6b on the lid 6 of the container made of a synthetic resin material such as polypropylene or polyethylene. Is pasted. Further, a plurality of cuts 4a are formed on the outer periphery of the sheet material 4 at appropriate intervals, and the sheet material 4 is placed on an outer surface mold 2b corresponding to the surface shape of the lid 6 of the container, and is primary molded into a lid shape. After this, the mold 6 is a container lid 6 formed by injecting a synthetic resin material from the core mold 1 after the mold mold 2 and the core mold 1 face each other and the mold is clamped. This is a method for forming a container lid 6 and a container lid 6 that can be easily applied without decorating a pattern, a photograph, or the like on the entire surface of the diameter without causing misalignment, deflection, or wrinkle. Note that the entire outer diameter is a surface obtained by combining the top plate portion 6a and the side wall portion 6b of the lid 6 of the container.

図1乃至図4において、本発明である容器の蓋6をインモールド成形法により成形する成形方法を説明する。固定金型であるコア型1と可動金型であるキャビ型2で一対の金型が構成させる。前記コア型1には、合成樹脂材を高温で溶融する樹脂射出器1aと前記樹脂射出器1aと連結し合成樹脂材を外へ流出する射出部1bを有し、キャビ型2には、エアーにて吸引するためのエアー吸引管2aが設けられており、図1に示すとおり、金型が型開き状態になった際、前記シート材4を外面型2bに載置するための専用のロボットハンド3によって前記シート材4が金型内に搬入される。前記ロボットハンド3は、前記キャビ型2の外面型2bへシート材4が密着するように、容器の蓋6の内面型1cと同形状又は類似形状に形成した型部3aと外面型2bに面する位置にシート材4を容易に吸着させるゴム素材などからなる吸着板3bが接合されている。 1 to 4, a molding method for molding the container lid 6 according to the present invention by an in-mold molding method will be described. A pair of molds are constituted by a core mold 1 which is a fixed mold and a cavity mold 2 which is a movable mold. The core mold 1 has a resin injector 1a that melts a synthetic resin material at a high temperature and an injection portion 1b that is connected to the resin injector 1a and flows out of the synthetic resin material. An air suction pipe 2a is provided for suctioning at the position of the machine. As shown in FIG. 1, a dedicated robot for placing the sheet material 4 on the outer surface mold 2b when the mold is opened. The sheet material 4 is carried into the mold by the hand 3. The robot hand 3 faces the mold part 3a and the outer mold 2b formed in the same shape or similar to the inner mold 1c of the container lid 6 so that the sheet material 4 is in close contact with the outer mold 2b of the mold 2. An adsorbing plate 3b made of a rubber material or the like that easily adsorbs the sheet material 4 is joined to the position.

次に図2に示すとおり、前記ロボットハンド3がキャビ型2側に移動し、吸着板3bに吸着されたシート材4がロボットハンド3の型部3aとキャビ型2の外面型2bに挟まれ、シート材4がコの字型に曲がった状態となり蓋形状に一次成形される。コの字型に曲がった前記シート材4は、前記エアー吸引管2aからエアーによる吸引が行われると、前記シート材4は外面型2bの表面に吸着し前記ロボットハンド3の吸着板3bより離脱される。 Next, as shown in FIG. 2, the robot hand 3 moves to the mold 2 side, and the sheet material 4 adsorbed by the suction plate 3b is sandwiched between the mold 3a of the robot hand 3 and the outer mold 2b of the mold 2. Then, the sheet material 4 is bent into a U shape and is primarily formed into a lid shape. When the sheet material 4 bent in a U-shape is sucked by air from the air suction pipe 2 a, the sheet material 4 is attracted to the surface of the outer surface mold 2 b and detached from the suction plate 3 b of the robot hand 3. Is done.

図3において、キャビ型2とコア型1が突き合って金型が型締めされた状態を示す。前記型締め状態では、キャビ型2の外面型2bとコア型1の内面型1cによって成形用キャビティ61が形成される。また、キャビ型2の外面型2bと前記外面型2bに吸着されたシート材4との間に若干の空間となる隙間部5が発生する。   FIG. 3 shows a state in which the mold 2 is clamped by the cavity mold 2 and the core mold 1 abutting each other. In the mold clamping state, a molding cavity 61 is formed by the outer surface mold 2 b of the mold 2 and the inner surface mold 1 c of the core mold 1. Further, a gap 5 is formed between the outer surface mold 2b of the mold 2 and the sheet material 4 adsorbed on the outer surface mold 2b.

図4において、前記樹脂射出器1a内には高温で溶融した合成樹脂材が射出部1bから高圧力でキャビティ61内へ射出され、その圧力によってキャビ型2の外面型2bに押し付けられる。前記キャビ型2の外面型2bへ押し付けられたシート材4は、その圧力により外面型2bへ密着しプラスチック成形品の容器の蓋6が成形される。前記プラスチック成形品の容器の蓋6が硬化した後、キャビ型2がコア型1から後退して金型が型開きし、前記容器の蓋6がロボットハンドなどによって取り出される。 In FIG. 4, a synthetic resin material melted at a high temperature is injected into the cavity 61 at a high pressure from the injection portion 1b into the resin injector 1a and pressed against the outer surface mold 2b of the mold 2 by the pressure. The sheet material 4 pressed against the outer surface mold 2b of the mold 2 is brought into close contact with the outer surface mold 2b by the pressure, and a lid 6 of a plastic molded product container is formed. After the container lid 6 of the plastic molded product is cured, the mold 2 is retracted from the core mold 1 to open the mold, and the container lid 6 is taken out by a robot hand or the like.

図7において、シート材4の形状を示す。前記シート材4の外周に切り目4aを適宜間隔で複数個、V字形状となる切り目4aを形成することで、段差となるリブ部6cを有する天板部6a乗り越え、前記天板部6aの外周から下端へ延出した側壁部6bに沿い前記シート材4が密着し、容器の蓋6の外径全面に模様や写真などの加飾を施すことができる。前記シート材4の素材については、合成樹脂材からなる伸縮可能なユポシートやユポシートと同調する素材を使用することで、成形時に熱が加えられたシート材が伸長され段差を有するリブ部6cを覆いかぶせ前記シート材4が密着される。またシート材4にたわみやしわが発生しない理由として、合成樹脂材が射出部1bから高圧力でキャビティ61内へ射出され、その圧力によってキャビ型2の外面型2bに押し付けられるため、仮にシート材4にたわみやしわが発生したものがキャビ型2の外面型2bに吸着してあったとしても、高圧力と熱が加わることで前記シート材4は溶融した合成樹脂材と一緒に膨張し、その後低温となり収縮されるので、容器の蓋6の外径全面にしわやたわみの発生しない加飾を施すことができ、意匠性や装飾性を優れさせることができる。 In FIG. 7, the shape of the sheet material 4 is shown. By forming a plurality of V-shaped cuts 4a at appropriate intervals on the outer periphery of the sheet material 4, the sheet member 4 gets over the top plate part 6a having a rib part 6c that becomes a step, and the outer periphery of the top plate part 6a. The sheet material 4 adheres along the side wall portion 6b extending from the bottom to the bottom, so that the entire outer diameter of the lid 6 of the container can be decorated with a pattern or a photograph. About the raw material of the said sheet | seat material 4, the sheet | seat material to which the heat | fever was added at the time of shaping | molding is extended, and the rib part 6c which has a level | step difference is covered by using the raw material which synchronizes with the stretchable YUPO sheet | seat which consists of synthetic resin materials. Cover the sheet material 4 closely. Further, as a reason that the sheet material 4 is not bent or wrinkled, the synthetic resin material is injected from the injection portion 1b into the cavity 61 at a high pressure and is pressed against the outer surface mold 2b of the mold 2 by the pressure. 4, even if the deflection or wrinkle generated in the mold 4 is adsorbed to the outer mold 2 b of the mold 2, the sheet material 4 expands together with the molten synthetic resin material by applying high pressure and heat, After that, since the temperature is reduced and the container is shrunk, the entire outer diameter of the lid 6 of the container can be decorated without causing wrinkles or deflection, and the design and decoration can be improved.

更に、前記シート材4を使用して成形した容器の蓋6の側面図を図9に示すとおり、容器の蓋6の外径全面までシート材4が覆いかぶせるため、容器内の被注出物が光を嫌うものやバリヤ性能を必要とするものであれば、前記シート材4を遮光性能や各種バリヤ性能を有するシート材4にすることでより優れた効果を有する。 Further, as shown in FIG. 9, a side view of the container lid 6 formed using the sheet material 4 covers the entire outer diameter of the container lid 6 so that the material to be poured in the container is covered. If the sheet material 4 dislikes light or requires barrier performance, the sheet material 4 is made into a sheet material 4 having light-shielding performance and various barrier performances.

また、シート材4の異なる第2の実施形態を図8に示す。前記シート材4の外周に切り目4bを適宜間隔で複数個形状となる切り目4bを形成することで、段差となるリブ部6cを有する天板部6a乗り越え、前記天板部6aの外周から下端へ延出した側壁部6bに沿い前記シート材4の切り目4bが隣接したシート材4同士が重なり合い密着し、容器の蓋6の外径全面に模様や写真などの加飾を施すことができる。尚、図10においては、前記シート材4を使用して成形した容器の蓋6の側面図である。 Moreover, 2nd Embodiment from which the sheet | seat material 4 differs is shown in FIG. By forming a plurality of cuts 4b with a plurality of cuts 4b at appropriate intervals on the outer periphery of the sheet material 4, the top plate part 6a having a rib part 6c that becomes a step is overcome and from the outer periphery of the top plate part 6a to the lower end. The sheet material 4 adjacent to the cut 4b of the sheet material 4 along the extended side wall portion 6b overlaps and comes into close contact with each other, and the entire outer diameter of the lid 6 of the container can be decorated with a pattern or a photograph. In addition, in FIG. 10, it is a side view of the lid | cover 6 of the container shape | molded using the said sheet | seat material 4. FIG.

更に、前記シート材の切り目4a、4bについては、適宜間隔で複数個設置するのが望ましいが、前記切り目4a、4bの設置する数を少なくしたり、切り目4a、4bをなしとした場合でも、合成樹脂材が射出部1bから高圧力でキャビティ61内へ射出され、その圧力によってキャビ型2の外面型2bに押し付けられるため、仮にシート材4にたわみやしわが発生したものがキャビ型2の外面型2bに吸着してあったとしても、高圧力と熱が加わることで前記シート材4は溶融した合成樹脂材と一緒に膨張し、その後低温となり収縮されるので、しわやたわみが目立たない加飾を施すことができる。 Furthermore, for the cuts 4a and 4b of the sheet material, it is desirable to install a plurality of appropriate intervals, but even when the number of the cuts 4a and 4b is reduced or the cuts 4a and 4b are not provided, The synthetic resin material is injected from the injection portion 1b into the cavity 61 at a high pressure and is pressed against the outer surface mold 2b of the mold 2 by the pressure. Even if it is adsorbed to the outer surface mold 2b, the sheet material 4 expands together with the molten synthetic resin material due to the application of high pressure and heat, and then shrinks at a low temperature, so that wrinkles and deflection are not noticeable. Can be decorated.

図11乃至図14において、本発明である容器の蓋6をインモールド成形法により成形する異なる第2の成形方法を説明する。固定金型であるコア型1と可動金型であるキャビ型2で一対の金型が構成させる。前記コア型1には、合成樹脂材を高温で溶融する樹脂射出器1aと前記樹脂射出器1aと連結し合成樹脂材を外へ流出する射出部1bを有している。また、前記コア型1には、エアーにて吸引するためのエアー吸引管2aが設けられており、図11に示すとおり、金型が型開き状態になった際、前記シート材4を内面型1cに載置するための専用のロボットハンド3によって前記シート材4が金型内に搬入される。前記ロボットハンド3は、前記コア型1の内面型1cへシート材4が密着するように、
内面型1cに面する位置にシート材4を容易に吸着させるゴム素材などからなる吸着板3bが接合されている。
11 to 14, a second different molding method for molding the container lid 6 according to the present invention by an in-mold molding method will be described. A pair of molds are constituted by a core mold 1 which is a fixed mold and a cavity mold 2 which is a movable mold. The core mold 1 includes a resin injector 1a that melts a synthetic resin material at a high temperature and an injection portion 1b that is connected to the resin injector 1a and flows out of the synthetic resin material. The core mold 1 is provided with an air suction pipe 2a for sucking with air. As shown in FIG. 11, when the mold is in the mold open state, the sheet material 4 is moved to the inner surface mold. The sheet material 4 is carried into the mold by a dedicated robot hand 3 for placing on 1c. The robot hand 3 is arranged so that the sheet material 4 is in close contact with the inner surface mold 1c of the core mold 1.
An adsorption plate 3b made of a rubber material or the like that easily adsorbs the sheet material 4 is joined to a position facing the inner surface mold 1c.

次に図12に示すとおり、前記ロボットハンド3がコア型1側に移動し、吸着板3bに吸着されたシート材4がロボットハンド3によりコア型1の内面型1cに接すると、前記内面型1cのエアー吸引管12aからエアーによる吸引が行われ、前記シート材4は内面型1cに吸着されて、前記ロボットハンド3の吸着板3bより離脱される。 Next, as shown in FIG. 12, when the robot hand 3 moves to the core mold 1 side and the sheet material 4 adsorbed by the suction plate 3 b comes into contact with the inner mold 1 c of the core mold 1 by the robot hand 3, the inner mold Air suction from the air suction pipe 12 a of 1 c is performed, and the sheet material 4 is attracted to the inner surface mold 1 c and detached from the suction plate 3 b of the robot hand 3.

図13において、キャビ型2とコア型1が突き合って金型が型締めされた状態を示す。前記型締め状態では、キャビ型2の外面型2bとコア型1の内面型1cによって成形用キャビティ61が形成される。また、金型が型締めされると、前記シート材4は容器の蓋6形状に折り曲げられ一次成形され、キャビ型2の外面型2bと前記外面型2bに吸着されたシート材4との間に若干の空間となる隙間部5が発生する。 FIG. 13 shows a state in which the mold 2 is clamped by the cavity mold 2 and the core mold 1 abutting each other. In the mold clamping state, a molding cavity 61 is formed by the outer surface mold 2 b of the mold 2 and the inner surface mold 1 c of the core mold 1. Further, when the mold is clamped, the sheet material 4 is bent into the shape of the lid 6 of the container and is primarily formed, and between the outer surface mold 2b of the mold 2 and the sheet material 4 adsorbed by the outer surface mold 2b. The gap portion 5 that becomes a little space is generated.

図14において、前記エアー吸引管12aからのエアー吸引をオフにしたと同時に、前記樹脂射出器1a内には高温で溶融した合成樹脂材が射出部1bから高圧力でキャビティ61内へ射出され、その圧力によってキャビ型2の外面型2bに押し付けられる。前記キャビ型2の外面型2bへ押し付けられたシート材4は、その圧力により外面型2bへ密着しプラスチック成形品の容器の蓋6が成形される。前記プラスチック成形品の容器の蓋6が硬化した後、キャビ型2がコア型1から後退して金型が型開きし、前記容器の蓋6がロボットハンドなどによって取り出される。 In FIG. 14, simultaneously with turning off the air suction from the air suction pipe 12a, a synthetic resin material melted at a high temperature is injected into the resin injector 1a from the injection portion 1b into the cavity 61 at a high pressure. The pressure is pressed against the outer surface mold 2b of the mold mold 2. The sheet material 4 pressed against the outer surface mold 2b of the mold 2 is brought into close contact with the outer surface mold 2b by the pressure, and a lid 6 of a plastic molded product container is formed. After the container lid 6 of the plastic molded product is cured, the mold 2 is retracted from the core mold 1 to open the mold, and the container lid 6 is taken out by a robot hand or the like.

この場合、エアーの吸引跡はシート材4の裏面につき、合成樹脂材を射出した時にシート材4の裏面は合成樹脂材で覆われるため、エアー吸引跡が残らない容器の蓋6を提供することができる。 In this case, the air suction trace is applied to the back surface of the sheet material 4, and when the synthetic resin material is injected, the back surface of the sheet material 4 is covered with the synthetic resin material. Can do.

また、本発明の容器の蓋6を例えば粉ミルクやインスタントコーヒー等の湿気進入を防止する必要がある被注出物が入った容器の蓋6として成形することも可能であるので、意匠性や装飾性、機能性を優れさせることができる。   Moreover, since the lid 6 of the container of the present invention can be formed as a lid 6 of a container containing an article to be poured that needs to prevent moisture from entering, for example, powdered milk or instant coffee, the design and decoration And functionality can be improved.

更に、容器の蓋6の材質がポリプロピレンやポリエチレンなどの合成樹脂材であるため、外部からの衝撃にも強く、容器の蓋6が変形してしまう心配もなく、適正な形状の容器の蓋6を容易に成形することができ品質的に優れたものを提供できる。 Furthermore, since the material of the container lid 6 is a synthetic resin material such as polypropylene or polyethylene, the container lid 6 is resistant to external impacts, and there is no fear of the container lid 6 being deformed. Can be easily molded, and can be provided with excellent quality.

本発明の実施形態である成形方法1を示す断面図である。It is sectional drawing which shows the shaping | molding method 1 which is embodiment of this invention. 同実施形態の成形方法2を示す断面図である。It is sectional drawing which shows the shaping | molding method 2 of the embodiment. 同実施形態の成形方法3を示す断面図である。It is sectional drawing which shows the shaping | molding method 3 of the embodiment. 同実施形態の成形方法4を示す断面図である。It is sectional drawing which shows the shaping | molding method 4 of the embodiment. 同実施形態を示す容器の蓋の断面図である。It is sectional drawing of the lid | cover of the container which shows the same embodiment. 図5の拡大図である。FIG. 6 is an enlarged view of FIG. 5. 本発明のシート材の平面図である。It is a top view of the sheet material of the present invention. 図7の異なる第2の実施形態を示す平面図である。It is a top view which shows 2nd Embodiment from which FIG. 7 differs. 図5の実施形態を示す側面図である。It is a side view which shows embodiment of FIG. 図9の異なる第2の実施形態を示す側面図である。It is a side view which shows 2nd Embodiment from which FIG. 9 differs. 図1の異なる第2の成形方法1を示す断面図である。It is sectional drawing which shows the 2nd shaping | molding method 1 from which FIG. 1 differs. 図1の異なる第2の成形方法2を示す断面図である。It is sectional drawing which shows the 2nd shaping | molding method 2 from which FIG. 1 differs. 図1の異なる第2の成形方法3を示す断面図である。It is sectional drawing which shows the 2nd shaping | molding method 3 from which FIG. 1 differs. 図1の異なる第2の成形方法4を示す断面図である。It is sectional drawing which shows the 2nd shaping | molding method 4 from which FIG. 1 differs.

符号の説明Explanation of symbols

1 コア型
1a 樹脂射出器
1b 射出部
1c 内面型
2 キャビ型
2a エアー吸引管
12a エアー吸引管
2b 外面型
3 ロボットハンド
3a 型部
3b 吸着板
4 シート材
4a 切り目
4b 切り目
5 隙間部
6 容器の蓋
6a 天板部
6b 側壁部
6c リブ部
61 キャビティ
DESCRIPTION OF SYMBOLS 1 Core type | mold 1a Resin injector 1b Injection | emission part 1c Inner surface type | mold 2 Cavity type
2a Air Suction Pipe 12a Air Suction Pipe 2b Outer Surface Type 3 Robot Hand 3a Mold Part 3b Suction Plate 4 Sheet Material 4a Cut 4b Cut 5 Crevice 6 Container Cover 6a Top Plate 6b Side Wall 6c Rib 61 Cavity

Claims (4)

上面に突出したリブ部を有する天板部を底とし、前記天板部の外周から下端へ延出した側壁部とした合成樹脂材でできた容器の蓋に前記天板部の上面から側壁部に至って合成樹脂材のシート材を貼りつける成形方法において、前記シート材を前記容器の蓋の表面形状に対応する外面型に載置して蓋形状に一次成形後、キャビ型とコア型が突き合って金型が型締めして、前記コア型から合成樹脂材を注入して成形することを特徴とする容器の蓋の成形方法。 A top plate portion having a rib portion protruding from the upper surface is used as a bottom, and a side wall portion from the upper surface of the top plate portion to a lid of a container made of a synthetic resin material having a side wall portion extending from the outer periphery to the lower end of the top plate portion. In the molding method of attaching a sheet material of synthetic resin material, the sheet material is placed on the outer surface mold corresponding to the surface shape of the lid of the container, and after the primary molding into the lid shape, the mold and the core die are pushed. A mold is clamped, and a synthetic resin material is injected from the core mold and molded. 上面に突出したリブ部を有する天板部を底とし、前記天板部の外周から下端へ延出した側壁部とした合成樹脂材でできた容器の蓋に前記天板部の上面から側壁部に至って合成樹脂材のシート材を貼りつける成形方法において、前記シート材を前記容器の蓋の裏面形状に対応する内面型に載置して後、キャビ型とコア型が突き合って金型が型締めして、前記シート材を容器の蓋形状に一次成形後、コア型から合成樹脂材を注入して成形することを特徴とする容器の蓋の成形方法。 A top plate portion having a rib portion protruding from the upper surface is used as a bottom, and a side wall portion from the upper surface of the top plate portion to a lid of a container made of a synthetic resin material as a side wall portion extending from the outer periphery to the lower end of the top plate portion In the molding method in which the sheet material of the synthetic resin material is attached, after the sheet material is placed on the inner surface mold corresponding to the back surface shape of the lid of the container, the mold and the core mold face each other. A method for molding a container lid, wherein the sheet material is first molded into a container lid shape after mold clamping and then a synthetic resin material is injected from a core mold. 上面に突出したリブ部を有する天板部を底とし、前記天板部の外周から下端へ延出した側壁部とした合成樹脂材でできた容器の蓋に前記天板部の上面から側壁部に至って合成樹脂材のシート材を貼りつける容器の蓋において、前記シート材を前記容器の蓋の表面形状に対応する外面型に載置して蓋形状に一次成形後、キャビ型とコア型が突き合って金型が型締めして、前記コア型から合成樹脂材を注入して成形することを特徴とする容器の蓋。 A top plate portion having a rib portion protruding from the upper surface is used as a bottom, and a side wall portion from the upper surface of the top plate portion to a lid of a container made of a synthetic resin material having a side wall portion extending from the outer periphery to the lower end of the top plate portion. In the lid of the container to which the sheet material of the synthetic resin material is attached, the sheet material is placed on the outer surface mold corresponding to the surface shape of the container lid, and after the primary molding into the lid shape, the mold and the core mold are A container lid, wherein a mold is clamped against each other, and a synthetic resin material is injected from the core mold and molded. 上面に突出したリブ部を有する天板部を底とし、前記天板部の外周から下端へ延出した側壁部とした合成樹脂材でできた容器の蓋に前記天板部の上面から側壁部に至って合成樹脂材のシート材を貼りつける容器の蓋において、前記シート材を前記容器の蓋の裏面形状に対応する内面型に載置して後、キャビ型とコア型が突き合って金型が型締めして、前記シート材を容器の蓋形状に一次成形後、コア型から合成樹脂材を注入して成形することを特徴とする容器の蓋。
A top plate portion having a rib portion protruding from the upper surface is used as a bottom, and a side wall portion from the upper surface of the top plate portion to a lid of a container made of a synthetic resin material having a side wall portion extending from the outer periphery to the lower end of the top plate portion. In the lid of the container to which the sheet material of the synthetic resin material is attached, after the sheet material is placed on the inner surface mold corresponding to the back surface shape of the lid of the container, the mold and the core mold face each other The container lid is formed by first mold-molding the sheet material into a container lid shape and then injecting a synthetic resin material from the core mold.
JP2006183264A 2005-11-07 2006-07-03 Lid of container and its molding method Pending JP2007144985A (en)

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JP2020029079A (en) * 2018-08-25 2020-02-27 ニックス株式会社 Lid of container
JP2020036630A (en) * 2018-08-31 2020-03-12 株式会社吉野工業所 Container and manufacturing method of the same
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WO2010055822A1 (en) * 2008-11-13 2010-05-20 ポリマテック株式会社 Method of manufacturing decorated molded element, and decorated molded element
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JP7339460B1 (en) * 2022-11-22 2023-09-05 裕義 林 Cover, blank material for cover, combination of cover and container, and container with cover

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