JP3901017B2 - Injection mold for cup-shaped containers with in-mold labels - Google Patents

Injection mold for cup-shaped containers with in-mold labels Download PDF

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Publication number
JP3901017B2
JP3901017B2 JP2002155434A JP2002155434A JP3901017B2 JP 3901017 B2 JP3901017 B2 JP 3901017B2 JP 2002155434 A JP2002155434 A JP 2002155434A JP 2002155434 A JP2002155434 A JP 2002155434A JP 3901017 B2 JP3901017 B2 JP 3901017B2
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Japan
Prior art keywords
mold
container
wall
cup
cavity
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JP2003340876A (en
Inventor
忠祐 小嶋
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Toppan Inc
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Toppan Inc
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • 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
    • B29C2045/1486—Details, accessories and auxiliary operations
    • B29C2045/14901—Coating a sheet-like insert smaller than the dimensions of the adjacent mould wall
    • B29C2045/14918—Coating a sheet-like insert smaller than the dimensions of the adjacent mould wall in-mould-labelling
    • B29C2045/14926—Coating a sheet-like insert smaller than the dimensions of the adjacent mould wall in-mould-labelling multiple labels in the same cavity

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  • Moulds For Moulding Plastics Or The Like (AREA)
  • Injection Moulding Of Plastics Or The Like (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、容器にハイバリア性、耐熱性、耐圧性や加飾性などを特に必要とする内容物に用いるプラスチック製の脚なしカップ状容器を製造するためのインモールドラベル付カップ状容器用射出成形金型に関するものである。
【０００２】
【従来の技術】
従来、プラスチック製のカップ状容器においては、その使用目的からハイバリア性、耐熱性、耐圧性や加飾性などの特性を容器に付与するために、図２（ａ）及び（ｂ）に示すように、容器の周壁（２１）面にその特性をもつ周壁用インモールドラベルを（３１０）、底壁（２２）面にその特性をもつ底壁用インモールドラベル（３２０）を融着一体化したインモールドラベル付カップ状容器（２０）が使用されていた。
【０００３】
【発明が解決しようとする課題】
しかしながら、上述の従来のインモールドラベル付カップ状容器においては、カップ状容器の外観形状が四角柱状で、周壁用と底壁用が連続する十字状のインモールドラベルを融着一体化する場合には、脚部なしのインモールドラベル付カップ状容器でも良好な容器を作製することができるが、周壁面と底壁面とに別個の２枚のインモールドラベルを融着一体化する場合には、図４に示すように、ゲート（１０１）（湯口）からキャビティ（１１）（雄型と雌型の間の空間）内に射出された溶融樹脂の高速で高圧な流れ（矢印で示す）によって、金型内に挿着された周壁用インモールドラベル（３０１）の下端が捲れ、溶融樹脂が周壁用インモールドラベルの下端の外側へ廻り込むトラブルがあった。このトラブルの改善策としては、図２（ｂ）に示すように、周壁の下端に脚部（２３）をつけて容器を成形すると、図３に示すように、射出成形金型（１０）の脚部に周壁用インモールドラベル（３１０）の下端を挿入して周壁用インモールドラベルを金型内に挿着すると、ゲート（１０１）からキャビティ（１１）内に射出された溶融樹脂の高速で高圧な流れ（矢印で示す）は、キャビティの底壁を成形する外周位置から、上方の周壁を形成するキャビティ方向と下方の脚部を形成するキャビティ方向とに分かれ、この脚部を形成するキャビティへ流入する溶融樹脂によっては、周壁用インモールドラベルの下端が捲れるようなことはなく、良好なインモールドラベル付カップ状容器を作製することが可能となった。一方、周壁用と底壁用が連続する十字状のインモールドラベルを融着一体化する場合には、周壁の下端に脚部をつけると、溶融樹脂がインモールドラベルの下端から外側へ廻り込みやすく、インモールドラベル付カップ状容器の作製が困難であった。
【０００４】
本発明は、ハイバリア性、耐熱性、耐圧性や加飾性などの使用用途に必要な特性をもち、外観が良好なプラスチック製の脚なしカップ状容器を製造するためのインモールドラベル付カップ状容器用射出成形金型を提供するものである。
【０００５】
【課題を解決するための手段】
すなわち、本発明の第１の発明は、金型内に前もって周壁用及び底壁用インモールドラベルを挿着して、脚部なしカップ状容器を成形する雌型と雄型からなる射出成形金型であって、前記雌型の容器底壁を形成するキャビティ壁の外周内縁部に、前記容器の上下方向へ作動するスライドスリーブを設け、射出成形機上の型開き時に、前記スライドスリーブが容器の上下方向の下方へ移動して、前記雌型の容器底壁を形成するキャビティ壁の外周内縁部に隙間を形成し、この隙間に、前記周壁用インモールドラベルの下端を挿入して、雌型の容器周壁を形成するキャビティ壁面に、前記周壁用インモールドラベルをバキューム仮固定して挿着し、かつ前記底壁用インモールドラベルを、前記雌型の容器底壁を形成するキャビティ壁面にバキューム固定して挿着し、型締めと同時に、前記スライドスリーブの上端面を容器の底壁を形成するキャビティ壁面位置に移動させて、周壁用インモールドラベルの下端面位置を、容器の底壁を形成するキャビティ壁面位置にし、周壁用インモールドラベルをキャビティ壁面にバキューム固定したのち、キャビティ内に溶融樹脂をゲートより射出して容器を成形すると同時に、前記周壁用及び底壁用インモールドラベルを容器外面に融着一体化することを特徴とするインモールドラベル付カップ状容器用射出成形金型である。
【０００６】
次に、本発明の第２の発明は、前記スライドスリーブが容器の上下方向の下方へ移動して形成する前記雌型の容器底壁を形成するキャビティ壁の外周内縁部の隙間の幅をｗとし、前記周壁用インモールドラベルの厚みをｔとしたときに、ｗ≦２ｔであることを特徴とする第１の発明に記載のインモールドラベル付カップ状容器用射出成形金型である。
【０００７】
そして、本発明の第３の発明は、前記雌型のカップ状容器底壁を形成するキャビティ壁面の中央位置に、中心にゲートをもつ凸面状突起部を形成し、かつこの凸面状突起部の外周から１０ｍｍ以内に環状のバキュームスリットを形成することを特徴とする第１の発明又は第２の発明に記載のインモールドラベル付カップ状容器用射出成形金型である。
【０００８】
【発明の実施の形態】
本発明の射出成形金型は、射出成形機上で金型内に前もって周壁用及び底壁用インモールドラベルを挿着して、カップ状容器を成形すると同時に、周壁用及び底壁用インモールドラベルを、容器外面に融着一体化する脚なしのインモールドラベル付カップ状容器用射出成形金型である。射出成形材料としては、ポリプロピレン、ポリエチレン、ポリエチレンテレフタレートなどの熱可塑性樹脂を使用目的に合わせて用いることができ、インモールドラベルは、その容器の素材樹脂と熱融着して接着する樹脂層を裏面に有し、使用目的に合わせたハイバリア性、耐熱性、耐圧性や加飾性などの特性を有するものである。
【０００９】
本発明の射出成形金型は、特殊機構をもつ雌型と通常の雄型とからなり、その雌型の構造は、図１（ａ）及び（ｂ）に示すように、容器底壁を形成するキャビティ（１１）壁の外周内縁部に、成形する容器の上下方向へ作動するスライドスリーブ（１１０）を設けるものである。そして、射出成形機上で型開きしているときに、図１（ａ）に示すように、スライドスリーブ（１１０）が成形する容器の上下方向の下方へ移動して、容器底壁を形成するキャビティ壁の外周内縁部に隙間（１１１）を形成するものである。この隙間に、周壁用インモールドラベル（３１０）の下端を挿入して、雌型（１００）の容器周壁を形成するキャビティ壁面に、周壁用インモールドラベル（３１０）をバキューム仮固定して挿着し、同時に、底壁用インモールドラベル（３２０）を、雌型の容器底壁を形成するキャビティ壁面にバキューム固定して挿着するものである。そして、型締めと同時に、図１（ｂ）に示すように、スライドスリーブ（１１０）の上端面を容器の底壁を形成するキャビティ壁面位置に移動させて、周壁用インモールドラベル（３１０）の下端面位置を、容器の底壁を形成するキャビティ壁面位置にし、周壁用インモールドラベルをキャビティ壁面にバキューム固定したのち、キャビティ（１１）内に溶融樹脂をゲート（１０１）より射出して容器を成形すると同時に、周壁用及び底壁用インモールドラベルを容器外面に融着一体化して、脚なしのインモールドラベル付カップ状容器を作製するものである。
【００１０】
なお、容器底壁を形成するキャビティ壁の外周内縁部に形成する隙間は、隙間の左右方向の幅をｗとし、周壁用インモールドラベルの厚みをｔとすると、ｗ≦２ｔにするように設けるとよい。間隙の幅が広すぎるとラベル下端部の位置規制が難しくなる。
【００１１】
また、雌型のカップ状容器底壁を形成するキャビティ壁面の中央位置に、図１（ａ）に示すように、中心にゲート（１０１）をもつ凸面状突起部（１０２）を形成し、この凸面状突起部の外周から１０ｍｍ以内に環状のバキュームスリット（１０３）を形成すると、図２（ｂ）に示す中心位置に貫通孔（３２１）をもつ底壁用インモールドラベル（３２０）を挿着したときに、容器の成形時の溶融樹脂の流動圧による位置ずれを防ぐことができる。バキュームスリット位置を凸面状突起部の外周から１０ｍｍ以上にすると、位置ずれが発生しやすくなる。
【００１２】
本発明の射出成形金型を用いて脚なしインモールドラベル付カップ状容器を作製すると、周壁用インモールドラベルの下端の位置が、型締め時にスライドスリーブの上端面で容器の底壁を形成するキャビティ壁面位置に確実に位置規制されるため、ゲートより射出された溶融樹脂の流動によって周壁用インモールドラベルの下端が捲れて、溶融樹脂がラベルの外側へ廻り込むことがない。
【００１３】
【発明の効果】
本発明の射出成形金型を用いて、前もって周壁用及び底壁用のインモールドラベルを金型内に挿着して射出成形すると、脚なしのカップ状容器でも、インモールドラベルの外側に溶融樹脂が廻ることなく、外観が良好で使用目的に合った特性をもつインモールドラベル付カップ状容器を安定して製造することが可能である。
【図面の簡単な説明】
【図１】（ａ）は、本発明の一実施形態のインモールドラベル付カップ状容器用金型の型開き時の状態を示す説明図であり、（ｂ）は、型締め成形時のキャビティ内の溶融樹脂の流れを示す説明図である。
【図２】（ａ）は、カップ状容器の周壁外面に周壁用インモールドラベルを熱融着されていることを示す説明図であり、（ｂ）は、カップ状容器の底壁下面に底壁用インモールドラベルを熱融着されていることを示す説明図である。
【図３】従来の脚部を付けた一例のインモールドラベル付カップ状容器用金型の成形時のキャビティ内の溶融樹脂の流れを示す説明図である。
【図４】従来の脚部なしの一例のインモールドラベル付カップ状容器用金型の成形時のキャビティ内の溶融樹脂の流れを示す説明図である。
【符号の説明】
１０……射出成形金型
１１……キャビティ
２０……カップ状容器
２１……周壁
２２……底壁
２３……脚部
１００……雌型
１０１……ゲート
１０２……凸面状突起部
１０３，１０４……バキュームスリット
１１０……スライドスリーブ
１１１……隙間
２００……雄型
３１０……周壁用インモールドラベル
３２０……底壁用インモールドラベル
３２１……貫通孔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an injection for a cup-shaped container with an in-mold label for manufacturing a plastic legless cup-shaped container used for contents that particularly require high barrier properties, heat resistance, pressure resistance, decoration, etc. The present invention relates to a molding die.
[0002]
[Prior art]
Conventionally, in a plastic cup-shaped container, as shown in FIGS. 2 (a) and 2 (b), in order to impart characteristics such as high barrier properties, heat resistance, pressure resistance and decorating properties to the container. In addition, a peripheral wall in-mold label (310) having the characteristics is fused to the peripheral wall (21) surface of the container, and a bottom wall in-mold label (320) having the characteristics is fused and integrated to the bottom wall (22) surface. A cup-shaped container (20) with an in-mold label has been used.
[0003]
[Problems to be solved by the invention]
However, in the above-described conventional cup-shaped container with an in-mold label, the appearance of the cup-shaped container is a quadrangular prism shape, and a cross-shaped in-mold label having a continuous wall and bottom wall is fused and integrated. Can produce a good container even with a cup-shaped container with in-mold labels without legs, but when two separate in-mold labels are fused and integrated on the peripheral wall surface and the bottom wall surface, As shown in FIG. 4, by the high-speed and high-pressure flow (indicated by arrows) of the molten resin injected from the gate (101) (pouring gate) into the cavity (11) (the space between the male mold and the female mold), There was a problem that the lower end of the in-mold label (301) for the peripheral wall inserted in the mold was rolled and the molten resin went around to the outside of the lower end of the in-mold label for the peripheral wall. As a measure for solving this trouble, as shown in FIG. 2 (b), when a container is formed with a leg (23) attached to the lower end of the peripheral wall, as shown in FIG. 3, the injection mold (10) When the lower end of the in-mold label for the peripheral wall (310) is inserted into the leg and the in-mold label for the peripheral wall is inserted into the mold, the molten resin injected into the cavity (11) from the gate (101) at a high speed The high-pressure flow (indicated by the arrow) is divided into a cavity direction that forms the upper peripheral wall and a cavity direction that forms the lower leg portion from the outer peripheral position that forms the bottom wall of the cavity, and the cavity that forms this leg portion. Depending on the molten resin flowing in, the lower end of the in-mold label for the peripheral wall does not squeeze, making it possible to produce a cup-shaped container with a good in-mold label. On the other hand, when the cross-shaped in-mold label for the peripheral wall and the bottom wall is fused and integrated, if the leg is attached to the lower end of the peripheral wall, the molten resin goes around from the lower end of the in-mold label. It was easy and it was difficult to produce a cup-shaped container with an in-mold label.
[0004]
The present invention is a cup shape with an in-mold label for producing a plastic legless cup-shaped container having characteristics necessary for use applications such as high barrier properties, heat resistance, pressure resistance and decorativeness, and having a good appearance. An injection mold for containers is provided.
[0005]
[Means for Solving the Problems]
That is, the first invention of the present invention is an injection mold comprising a female mold and a male mold for forming a cup-shaped container without legs by inserting in-mold labels for a peripheral wall and a bottom wall in advance into the mold. A slide sleeve that operates in the vertical direction of the container is provided at the outer peripheral inner edge of the cavity wall that forms the bottom wall of the female mold, and the slide sleeve is a container when the mold is opened on an injection molding machine. The lower end of the in-mold label for the peripheral wall is inserted into the gap, and a gap is formed in the outer peripheral inner edge of the cavity wall forming the female container bottom wall. The peripheral wall in-mold label is temporarily attached to the cavity wall surface that forms the container peripheral wall of the mold, and the bottom wall in-mold label is attached to the cavity wall surface that forms the female container bottom wall. Vacuum At the same time as clamping the mold, the upper end surface of the slide sleeve is moved to the cavity wall surface position that forms the bottom wall of the container, and the lower end surface position of the in-mold label for the peripheral wall is moved to the bottom wall of the container. After the cavity wall in-mold label is vacuum fixed to the cavity wall surface at the position of the cavity wall to be formed, molten resin is injected into the cavity from the gate to mold the container, and at the same time, the peripheral wall and bottom wall in-mold labels are An injection mold for cup-shaped containers with an in-mold label, characterized by being fused and integrated with an outer surface.
[0006]
Next, the second invention of the present invention, before kissing ride sleeve of the gap periphery inner edge of the cavity walls forming the female receptacle bottom wall is formed by moving the vertical direction below the container width Is an injection mold for cup-shaped containers with an in-mold label according to the first aspect of the invention, wherein w is w, and the thickness of the peripheral wall in-mold label is t. .
[0007]
According to a third aspect of the present invention, a convex protrusion having a gate at the center is formed at the center of the cavity wall surface forming the female cup-shaped container bottom wall. An annular mold slit for cup-shaped containers with an in-mold label according to the first or second invention, wherein an annular vacuum slit is formed within 10 mm from the outer periphery.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
The injection molding die of the present invention inserts the in-mold labels for the peripheral wall and the bottom wall into the mold in advance on the injection molding machine to mold the cup-shaped container, and at the same time, the in-mold for the peripheral wall and the bottom wall. It is an injection mold for cup-shaped containers with in-mold labels without a leg that fuses and integrates the label with the outer surface of the container. As the injection molding material, thermoplastic resin such as polypropylene, polyethylene, polyethylene terephthalate, etc. can be used according to the purpose of use, and the in-mold label has a resin layer that is heat-sealed and bonded to the material resin of the container. It has characteristics such as high barrier properties, heat resistance, pressure resistance and decorating properties according to the purpose of use.
[0009]
The injection mold of the present invention comprises a female mold having a special mechanism and a normal male mold, and the structure of the female mold forms a container bottom wall as shown in FIGS. 1 (a) and (b). A slide sleeve (110) that operates in the vertical direction of the container to be molded is provided at the inner peripheral edge of the outer wall of the cavity (11). When the mold is opened on the injection molding machine, as shown in FIG. 1A, the slide sleeve (110) moves downward in the vertical direction of the container to be molded to form the container bottom wall. A gap (111) is formed at the inner peripheral edge of the cavity wall. The lower end of the in-mold label for the peripheral wall (310) is inserted into this gap, and the in-mold label for the peripheral wall (310) is temporarily attached to the cavity wall surface forming the container peripheral wall of the female mold (100). At the same time, the bottom wall in-mold label (320) is vacuum-fixed and attached to the cavity wall surface forming the female container bottom wall. Simultaneously with the mold clamping, as shown in FIG. 1 (b), the upper end surface of the slide sleeve (110) is moved to the cavity wall surface position forming the bottom wall of the container, and the in-mold label (310) for the peripheral wall is moved. The lower end surface position is set to the cavity wall surface position that forms the bottom wall of the container, and the in-mold label for the peripheral wall is vacuum fixed to the cavity wall surface, and then the molten resin is injected into the cavity (11) from the gate (101). At the same time as molding, the in-mold labels for the peripheral wall and the bottom wall are fused and integrated with the outer surface of the container to produce a cup-shaped container with in-mold labels without legs.
[0010]
The gap formed in the inner peripheral edge of the cavity wall forming the container bottom wall is provided so that w ≦ 2t, where w is the width in the left-right direction of the gap and t is the thickness of the in-mold label for the peripheral wall. Good. If the width of the gap is too wide, it is difficult to regulate the position of the lower end of the label.
[0011]
Further, as shown in FIG. 1A, a convex protrusion (102) having a gate (101) at the center is formed at the center of the cavity wall surface forming the female cup-shaped container bottom wall. When an annular vacuum slit (103) is formed within 10 mm from the outer periphery of the convex protrusion, an in-mold label (320) for the bottom wall having a through hole (321) at the center position shown in FIG. 2 (b) is inserted. When it does, the position shift by the fluid pressure of the molten resin at the time of shaping | molding of a container can be prevented. If the vacuum slit position is set to 10 mm or more from the outer periphery of the convex protrusion, misalignment tends to occur.
[0012]
When a cup-shaped container with a legless in-mold label is produced using the injection mold of the present invention, the bottom end of the peripheral sleeve in-mold label forms the bottom wall of the container at the top end surface of the slide sleeve when the mold is clamped. Since the position of the cavity wall surface is surely restricted, the lower end of the in-mold label for the peripheral wall is rolled by the flow of the molten resin injected from the gate, and the molten resin does not go around the label.
[0013]
【The invention's effect】
Using the injection mold of the present invention, in-mold labels for peripheral walls and bottom walls are inserted into the mold in advance and injection-molded. Even in cup-shaped containers without legs, they melt outside the in-mold labels. It is possible to stably produce a cup-shaped container with an in-mold label having a good appearance and characteristics suitable for the purpose of use without the resin turning.
[Brief description of the drawings]
FIG. 1A is an explanatory view showing a state when a mold for a cup-shaped container with an in-mold label according to an embodiment of the present invention is opened, and FIG. 1B is a cavity at the time of mold clamping. It is explanatory drawing which shows the flow of the inside molten resin.
FIG. 2A is an explanatory view showing that an in-mold label for a peripheral wall is heat-sealed to the outer surface of the peripheral wall of the cup-shaped container, and FIG. It is explanatory drawing which shows that the in-mold label for walls is heat-seal | fused.
FIG. 3 is an explanatory view showing the flow of molten resin in a cavity during molding of a mold for a cup-shaped container with an in-mold label with a conventional leg portion attached thereto.
FIG. 4 is an explanatory view showing the flow of molten resin in a cavity during molding of a mold for a cup-shaped container with an in-mold label as an example without a conventional leg portion.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Injection mold 11 ... Cavity 20 ... Cup-shaped container 21 ... Perimeter wall 22 ... Bottom wall 23 ... Leg part 100 ... Female mold 101 ... Gate 102 ... Convex-shaped projection part 103,104 …… Vacuum slit 110 …… Slide sleeve 111 …… Gap 200 …… Male mold 310 …… In-mold label 320 for peripheral wall …… In-mold label 321 for bottom wall …… through hole

Claims (3)

金型内に前もって周壁用及び底壁用インモールドラベルを挿着して、脚部なしカップ状容器を成形する雌型と雄型からなる射出成形金型であって、前記雌型の容器底壁を形成するキャビティ壁の外周内縁部に、前記容器の上下方向へ作動するスライドスリーブを設け、射出成形機上の型開き時に、前記スライドスリーブが容器の上下方向の下方へ移動して、前記雌型の容器底壁を形成するキャビティ壁の外周内縁部に隙間を形成し、該隙間に、前記周壁用インモールドラベルの下端を挿入して、雌型の容器周壁を形成するキャビティ壁面に、前記周壁用インモールドラベルをバキューム仮固定して挿着し、かつ前記底壁用インモールドラベルを、前記雌型の容器底壁を形成するキャビティ壁面にバキューム固定して挿着し、型締めと同時に、前記スライドスリーブの上端面を容器の底壁を形成するキャビティ壁面位置に移動させて、周壁用インモールドラベルの下端面位置を、容器の底壁を形成するキャビティ壁面位置にし、周壁用インモールドラベルをキャビティ壁面にバキューム固定したのち、キャビティ内に溶融樹脂をゲートより射出して容器を形成すると同時に、前記周壁用及び底壁用インモールドラベルを容器外面に融着一体化することを特徴とするインモールドラベル付カップ状容器用射出成形金型。  An injection mold comprising a female mold and a male mold for forming a cup-shaped container without legs by inserting in-mold labels for a peripheral wall and a bottom wall in advance into the mold, wherein the container bottom of the female mold A slide sleeve that operates in the vertical direction of the container is provided on the inner peripheral edge of the cavity wall that forms the wall, and when the mold is opened on the injection molding machine, the slide sleeve moves downward in the vertical direction of the container, A gap is formed at the outer peripheral inner edge of the cavity wall forming the female container bottom wall, and the lower end of the peripheral wall in-mold label is inserted into the gap, and the cavity wall surface forming the female container peripheral wall is The peripheral wall in-mold label is temporarily fixed and inserted, and the bottom wall in-mold label is vacuum-fixed and inserted into the cavity wall surface forming the female container bottom wall. at the same time, The upper end surface of the slide sleeve is moved to the cavity wall surface position that forms the bottom wall of the container, and the lower end surface position of the in-mold label for the peripheral wall is set to the cavity wall surface position that forms the bottom wall of the container. After the vacuum is fixed to the cavity wall surface, molten resin is injected into the cavity from the gate to form a container, and at the same time, the peripheral wall and bottom wall in-mold labels are fused and integrated to the outer surface of the container. Injection mold for cup-shaped containers with in-mold labels. 前記スライドスリーブが容器の上下方向の下方へ移動して形成する前記雌型の容器底壁を形成するキャビティ壁の外周内縁部の隙間の幅をｗとし、前記周壁用インモールドラベルの厚みをｔとしたときに、ｗ≦２ｔであることを特徴とする請求項１記載のインモールドラベル付カップ状容器用射出成形金型。The width of the gap between the outer peripheral inner edge of the cavity walls forming the female receptacle bottom wall before kissing ride sleeve is formed by moving the vertical direction below the container and w, the thickness of the peripheral wall for in-mold label 2. The injection mold for cup-shaped containers with in-mold labels according to claim 1, wherein w is equal to or less than 2t. 前記雌型のカップ状容器底壁を形成するキャビティ壁面の中央位置に、中心にゲートをもつ凸面状突起部を形成し、かつ該凸面状突起部の外周から１０ｍｍ以内に環状のバキュームスリットを形成することを特徴とする請求項１又は請求項２記載のインモールドラベル付カップ状容器用射出成形金型。  A convex protrusion having a gate at the center is formed at the center of the cavity wall surface forming the female cup-shaped container bottom wall, and an annular vacuum slit is formed within 10 mm from the outer periphery of the convex protrusion. An injection mold for a cup-shaped container with an in-mold label according to claim 1 or 2.
JP2002155434A 2002-05-29 2002-05-29 Injection mold for cup-shaped containers with in-mold labels Expired - Fee Related JP3901017B2 (en)

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CN101439572B (en) * 2007-11-23 2011-11-16 康准电子科技（昆山）有限公司 Molding device of in-mold decoration
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AT509616B1 (en) * 2010-03-26 2012-01-15 Georg Kaufmann Formenbau Ag INJECTION MOLDING

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