JP2018069448A - Molding method and molding device of paper container - Google Patents

Molding method and molding device of paper container Download PDF

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JP2018069448A
JP2018069448A JP2016207528A JP2016207528A JP2018069448A JP 2018069448 A JP2018069448 A JP 2018069448A JP 2016207528 A JP2016207528 A JP 2016207528A JP 2016207528 A JP2016207528 A JP 2016207528A JP 2018069448 A JP2018069448 A JP 2018069448A
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forming portion
surface forming
base paper
molding
paper container
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JP6792407B2 (en
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剛 蓑田
Go Minoda
剛 蓑田
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Tokan Kogyo Co Ltd
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Tokan Kogyo Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a simple-structured molding method and molding device capable of sufficiently collecting a material to around a center part of a blank sheet corresponding to a bottom part of a paper container without generating breakage nor poor molding.SOLUTION: A molding method and a molding device 100, sandwiching base paper P between a core 122 and a mold cavity 112 for compression molding to give a paper container, are configured in that the core 122 is provided with an inner bottom surface formation part 123 and an internal surface formation part 126. The inner bottom surface formation part 123 is configured so as to be driven relatively with the internal surface formation part 126 in the direction of the mold cavity 112, and is configured to press the base paper P then to push the base paper P in the direction of the mold cavity 112 by using the inner bottom surface formation part 123.SELECTED DRAWING: Figure 2

Description

本発明は、紙容器の成形方法および成形装置に関するものであって、特に、プレス成形による紙容器の成形方法および成形装置に関する。   The present invention relates to a paper container molding method and a molding apparatus, and more particularly, to a paper container molding method and a molding apparatus by press molding.

従来より紙容器は、包装容器の分野で汎用され、冷凍食品等の収納や、レンジ調理時の容器や調理後に配膳するための皿等の用途に使用されている紙容器が公知である。
また、製造品質が安定する紙容器の成形方法として、以下のようなコアとキャビティとで原紙をプレス成形して紙容器を成形する製造方法及び製造装置が公知である。 Conventionally, paper containers are widely used in the field of packaging containers, and paper containers used for applications such as storage of frozen foods, containers for cooking in a range, and dishes for serving after cooking are known.
Further, as a method for forming a paper container with stable manufacturing quality, a manufacturing method and a manufacturing apparatus for forming a paper container by press-forming a base paper with a core and a cavity as described below are known.

特許文献１には、帯状の原紙を供給する工程と、原紙の対応する位置に、成形時の皺を吸収するための罫線を形成し、移送する工程と、罫線が形成されて移送された原紙から、罫線の少なくとも一部を含む所望の形状のブランクシートを連続的に打ち抜く工程と、打ち抜かれたブランクシートの各々を、その位置でプレス成形する工程とを備えたことを特徴とする紙容器の製造方法及び製造装置が開示されている。
また、この紙容器の製造装置は、帯状の原紙を供給する原紙供給手段と、供給された原紙の対応する位置に、成形時の皺を吸収するための罫線を形成した後、移送する罫線形成手段と、移送された原紙から、罫線の少なくとも一部を含む所望の形状のブランクシートを打ち抜くブランクシート打抜手段と、打ち抜かれたブランクシートを、その位置でプレス成形するプレス手段とで構成されたものである。
このように構成したことにより、帯状の原紙からブランクシートを打ち抜いた位置でそのままプレス成形されるため、ブランクシートを打ち抜き後にプレス位置まで移載する場合に比べて位置ずれを抑制でき、製造品質が安定するようになる。
また、ブランクシートには罫線が形成されるため、プレス成形時に圧縮されたブランクシートの表面に無秩序に発生する皺を、罫線に沿って形成された凹凸に吸収することができ、さらに紙容器の製造品質を安定できる。 Patent Document 1 discloses a step of supplying a strip-shaped base paper, a step of forming and transferring a ruled line for absorbing wrinkles at the time of forming at a corresponding position of the base paper, and a base paper having a ruled line formed and transferred. A blank container having a desired shape including at least a part of the ruled line, and a step of press-molding each blank sheet at the position. A manufacturing method and a manufacturing apparatus are disclosed.
In addition, the paper container manufacturing apparatus includes a base paper supply unit that supplies a strip-shaped base paper, and a ruled line formation that forms a ruled line for absorbing wrinkles at the time of forming at a corresponding position of the supplied base paper and then transfers the ruled line. Means, blank sheet punching means for punching a blank sheet having a desired shape including at least part of the ruled line from the transferred base paper, and press means for press-molding the punched blank sheet at that position. It is a thing.
By configuring in this way, the blank sheet is press-molded as it is at the position where the blank sheet is punched out from the belt-like base paper. Become stable.
In addition, since a ruled line is formed on the blank sheet, wrinkles that occur randomly on the surface of the blank sheet compressed during press molding can be absorbed by the irregularities formed along the ruled line. Production quality can be stabilized.

特開２０１４−１１１３９１JP 2014-111131 A

ところが、特許文献１の帯状の原紙から打ち抜いたブランクシートをプレス成形して製造する紙容器の従来の製造方法及び製造装置は、プレス成形するための成形型であるコア及びキャビティによって、プレス成形後の紙容器の底部に相当するブランクシートの中心付近方向へブランクシートの外周部を引き込むことで、材料を集めながら形成しているが、プレス成形前のブランクシートと成形型との接触箇所が多いため、ブランクシートの中心付近に十分に材料が集まらず、プレス成形後の紙容器の底面や壁部が局所的に薄くなったり、破れるなどの成形不良が発生する虞があった。
また、紙容器の使用時に底面の変形を抑制するために、紙容器の底面に凹凸を設けることが有効であるが、特許文献１の紙容器の製造方法及び製造装置では、ブランクシートに大きな引張力を与えながらブランクシートの中心方向へブランクシートの外周部を引き込んでプレス成形するため、紙容器の底部に凹凸を設けるための材料を十分に集めることが困難であり、成形不良が発生する虞があった。
また、紙容器の底面と壁部との接続位置であり、筒状の壁部が立ち上がり始める外周縁部の円弧を小さく形成すると、プレス成形前に外周縁部から底面側へ集められる材料が減り、成形不良が発生する虞があった。 However, the conventional manufacturing method and manufacturing apparatus for paper containers manufactured by press-molding a blank sheet punched out from a strip-shaped base paper of Patent Document 1 are provided with a core and a cavity that are molds for press-molding. It is formed while collecting the material by drawing the outer periphery of the blank sheet toward the center of the blank sheet corresponding to the bottom of the paper container, but there are many contact points between the blank sheet and the mold before press molding Therefore, the material is not sufficiently collected near the center of the blank sheet, and there is a possibility that a molding defect such as local thinning or tearing of the bottom or wall of the paper container after press molding may occur.
In order to suppress the deformation of the bottom surface during use of the paper container, it is effective to provide irregularities on the bottom surface of the paper container. However, in the paper container manufacturing method and manufacturing apparatus of Patent Document 1, a large tension is applied to the blank sheet. Since the outer peripheral part of the blank sheet is drawn in the center of the blank sheet while applying force and press-molded, it is difficult to collect enough materials to provide unevenness on the bottom of the paper container, and molding defects may occur. was there.
In addition, if the arc of the outer peripheral edge, which is the connection position between the bottom surface and the wall of the paper container and the cylindrical wall starts to rise, is reduced, the material collected from the outer peripheral edge to the bottom before pressing is reduced. There was a risk that defective molding would occur.

本発明は、これらの問題点を解決するものであり、簡単な構成で、紙容器の底部に相当するブランクシートの中心付近へ材料を十分に集めることができ、破れや成形不良が発生することがない紙容器の成形方法及び成形装置を提供することを目的とするものである。   The present invention solves these problems, and with a simple configuration, the material can be sufficiently collected near the center of the blank sheet corresponding to the bottom of the paper container, and tears and poor molding occur. It is an object of the present invention to provide a method and apparatus for forming a paper container having no gap.

本発明の紙容器の成形方法は、底面と、前記底面から立ち上がった筒状の壁部とを有した紙容器を成形するものであり、紙容器の外面を成形するキャビティと前記紙容器の内面を成形するコアとの間に置いた平板状の原紙の周囲をおさえ、前記キャビティと前記コアとを接近する方向に相対的に移動させて前記原紙を周囲から変形させつつ引き込んだ後、前記コアと前記キャビティとで変形した前記原紙を挟み、さらに圧縮成形する紙容器の成形方法であって、前記コアには、内底面形成部と、内壁面形成部とが設けられ、前記内底面形成部は、前記キャビティ方向へ前記内壁面形成部と相対的に駆動可能に構成され、前記原紙をおさえた後に、前記内底面形成部によって、前記原紙を前記キャビティ方向へ押し出すことにより、前記課題を解決するものである。
本発明の紙容器を成形する成形装置は、底面と、前記底面から立ち上がった筒状の壁部とを有した紙容器を成形する成形装置であって、該成形装置は、平板状の原紙を押圧して紙容器の内面を形成するコアと、前記原紙を押圧して紙容器の外面を形成するキャビティと、前記原紙の周囲をおさえる原紙ホルダーとを有し、前記コアは、内底面形成部と、内壁面形成部とを有し、前記内底面形成部は、前記内壁面形成部から離脱して前記キャビティ方向へ相対的に前後駆動可能に構成されており、前記キャビティは、前記コア方向へ相対的に前後駆動可能に構成されていることにより、前記課題を解決するものである。 The method for forming a paper container of the present invention is to form a paper container having a bottom surface and a cylindrical wall portion rising from the bottom surface, a cavity for forming the outer surface of the paper container, and an inner surface of the paper container After pressing the periphery of the flat base paper placed between the core and the core, the core and the core are relatively moved in the approaching direction and the base paper is drawn while being deformed from the periphery, and then the core And forming a paper container that is further compression-molded between the base paper and the cavity, wherein the core is provided with an inner bottom surface forming portion and an inner wall surface forming portion, and the inner bottom surface forming portion Is configured to be able to be driven relative to the inner wall surface forming portion in the cavity direction, and after pressing the base paper, the inner bottom surface forming portion pushes the base paper in the cavity direction, thereby solving the problem. It is intended to attain.
A molding apparatus for molding a paper container according to the present invention is a molding apparatus for molding a paper container having a bottom surface and a cylindrical wall portion rising from the bottom surface. A core that presses to form an inner surface of the paper container; a cavity that presses the base paper to form an outer surface of the paper container; and a base paper holder that holds the periphery of the base paper; And an inner wall surface forming portion, wherein the inner bottom surface forming portion is configured to be separated from the inner wall surface forming portion so as to be relatively movable back and forth in the cavity direction. The above-mentioned problem is solved by being configured to be relatively movable back and forth.

請求項１に係る紙容器の成形方法によれば、コアの内底面形成部は、キャビティ方向へ内壁面形成部と相対的に駆動可能に構成され、原紙をおさえた後に、内底面形成部によって、原紙をキャビティ方向へ押し出すことで、原紙を余分に引き出した状態で工程が進むため、紙容器の底部に相当するブランクシートの中心付近へ材料を十分に集めることができる。
また、原紙が内壁面形成部と密着しないため、原紙を内壁面形成部と密着させている場合に比べて、原紙に大きな引張力を与えることなくキャビティ側へ引き込むことができ、紙容器の底面の形成に必要な材料を供給できる。
また、プレス成形した紙容器がコアに張り付いた場合、内底面形成部をキャビティ方向へ移動させることで、コアからの紙容器の取り外しを容易にできる。 According to the method for forming a paper container according to claim 1, the inner bottom surface forming portion of the core is configured to be driven relative to the inner wall surface forming portion in the cavity direction, and after holding the base paper, the inner bottom surface forming portion By extruding the base paper in the cavity direction, the process proceeds with the base paper being pulled out excessively, so that the material can be sufficiently collected near the center of the blank sheet corresponding to the bottom of the paper container.
In addition, since the base paper does not adhere to the inner wall surface forming portion, it can be drawn into the cavity without applying a large tensile force to the base paper compared to the case where the base paper is in close contact with the inner wall surface forming portion. The material necessary for forming can be supplied.
Further, when the press-molded paper container sticks to the core, the paper container can be easily detached from the core by moving the inner bottom surface forming portion in the cavity direction.

請求項２に記載の構成によれば、キャビティと内底面形成部とで原紙を挟みながら、圧縮成形直前に内底面形成部を内壁面形成部方向へ移動するため、内底面形成部側からの原紙への引張力を弱めた状態で紙容器の底面のプレス成形を行えるため、成形不良を防止できるとともに、原紙への引張力が弱まっているので、紙容器の底面の形成に必要な材料をより引き込むことができ、複雑な底形状の紙容器でも破れや成形不良の発生を防止できる。
請求項３に記載の構成によれば、外底面形成部が外壁面形成部からコア方向へ突出したまま原紙を引き込みつつ、原紙を外底面形成部と内底面形成部とで挟むため、原紙とコア及びキャビティとの接触箇所が少ない状態で原紙を外底面形成部と内底面形成部とで挟むことで、原紙の位置ずれを抑制できる。
また、内底面形成部を内壁面形成部方向へ移動する直前、直後、あるいは同時に、外底面形成部が外壁面形成部側に相対的に移動するため、コア及びキャビティ全体がほぼ同時に原紙を挟み込むことができ、原紙に大きな引張力を与えることがなく、紙容器全体の形成に必要な材料を供給でき、紙容器の成形不良を防止できる。
さらに、プレス成形した紙容器がキャビティに張り付いた場合、外底面形成部をコア方向へ移動させることで、キャビティからの紙容器の取り外しを容易にできる。 According to the configuration of the second aspect, the inner bottom surface forming portion is moved toward the inner wall surface forming portion immediately before the compression molding while sandwiching the base paper between the cavity and the inner bottom surface forming portion. Since the bottom of the paper container can be press-molded with the tensile force on the base paper weakened, molding defects can be prevented and the tensile force on the base paper is weakened. It can be pulled in more, and even a complicated bottom-shaped paper container can prevent the occurrence of breakage and molding defects.
According to the configuration of claim 3, the base paper is sandwiched between the outer bottom surface forming portion and the inner bottom surface forming portion while the outer bottom surface forming portion pulls in the base paper while protruding from the outer wall surface forming portion toward the core. By positioning the base paper between the outer bottom surface forming portion and the inner bottom surface forming portion in a state where there are few contact points with the core and the cavity, it is possible to suppress the positional deviation of the base paper.
Also, since the outer bottom surface forming portion moves relatively toward the outer wall surface forming portion immediately before, immediately after or simultaneously with the movement of the inner bottom surface forming portion toward the inner wall surface forming portion, the entire core and cavity sandwich the base paper almost simultaneously. It is possible to supply a material necessary for forming the entire paper container without giving a large tensile force to the base paper, and it is possible to prevent molding failure of the paper container.
Further, when the press-molded paper container sticks to the cavity, the outer bottom surface forming portion is moved in the core direction, so that the paper container can be easily removed from the cavity.

請求項４に係る紙容器を成形する成形装置によれば、コアと、キャビティと、原紙ホルダーとを有し、コアは、内底面形成部と内壁面形成部とを有し、内底面形成部は、内壁面形成部から離脱してキャビティ方向へ相対的に前後駆動可能に構成されており、キャビティは、コア方向へ相対的に前後駆動可能に構成されているため、原紙を内底面形成部でキャビティ方向へ押し出すことで原紙を余分に引き出した状態で工程を進めることができる。
このため、原紙に大きな引張力を与えることなく紙容器の底面の形成に必要な材料を供給でき、紙容器の成形不良を防止できる。
また、プレス成形した紙容器がコアに張り付いた場合、内底面形成部をキャビティ方向へ移動させることで、コアからの紙容器の取り外しを容易にできる。 According to the molding apparatus for molding the paper container according to claim 4, the core includes a core, a cavity, and a base paper holder, the core includes an inner bottom surface forming portion and an inner wall surface forming portion, and the inner bottom surface forming portion. Is configured to be able to be driven back and forth relatively in the cavity direction by separating from the inner wall surface forming portion, and the cavity is configured to be driven back and forth relatively in the core direction. By pushing in the cavity direction, it is possible to proceed with the process in a state where the base paper is pulled out excessively.
For this reason, it is possible to supply a material necessary for forming the bottom surface of the paper container without giving a large tensile force to the base paper, and it is possible to prevent a defective molding of the paper container.
Further, when the press-molded paper container sticks to the core, the paper container can be easily detached from the core by moving the inner bottom surface forming portion in the cavity direction.

請求項５に記載の構成によれば、外底面形成部は、外壁面形成部から離脱してコア方向へ相対的に前後駆動可能に構成されているため、外底面形成部が外壁面形成部からコア方向へ突出したまま原紙を引き込みつつ、原紙を外底面形成部と内底面形成部とで挟むことで、原紙とコア及びキャビティとの接触箇所が少ないうちに原紙を外底面形成部と内底面形成部とで挟むことができ、原紙の位置ずれを抑制できる。
また、内底面形成部が内壁面形成部方向へ移動する直前、直後、あるいは同時に、外底面形成部が外壁面形成部側に相対的に移動することで、コア及びキャビティ全体が同時に原紙を挟み込むことができ、原紙に大きな引張力を与えることがなく、紙容器全体の形成に必要な材料を十分に供給でき、紙容器の成形不良を防止できる。
さらに、プレス成形した紙容器がキャビティに張り付いた場合、外底面形成部をコア方向へ移動させることで、キャビティからの紙容器の取り外しを容易にできる。
請求項６に記載の構成によれば、内底面形成部には、駆動部としてエアシリンダが設けられているため、エアシリンダの設定を変更することで、タイミングや圧力、速度を容易に調整可能であり、内底面形成部の移動距離や、内底面形成部と外底面形成部とで原紙を挟む際の圧力調整等を行うことで、様々な形状の容器に最適に対応することができる。 According to the configuration of the fifth aspect, the outer bottom surface forming portion is configured to be separated from the outer wall surface forming portion so as to be relatively movable back and forth in the core direction. While pulling the base paper while protruding from the core, the base paper is sandwiched between the outer bottom surface forming portion and the inner bottom surface forming portion, so that the base paper can be moved from the inner bottom surface forming portion to the inner bottom surface while there are few contact points between the base paper and the core and cavity. It can be sandwiched between the bottom surface forming portion and the positional deviation of the base paper can be suppressed.
Also, the core and the entire cavity sandwich the base paper at the same time by the relative movement of the outer bottom surface forming portion toward the outer wall surface forming portion immediately before, immediately after, or simultaneously with the movement of the inner bottom surface forming portion toward the inner wall surface forming portion. Therefore, it is possible to sufficiently supply the material necessary for forming the entire paper container without giving a large tensile force to the base paper, and to prevent molding failure of the paper container.
Further, when the press-molded paper container sticks to the cavity, the outer bottom surface forming portion is moved in the core direction, so that the paper container can be easily removed from the cavity.
According to the configuration of the sixth aspect, since the inner bottom surface forming portion is provided with the air cylinder as the driving portion, the timing, pressure, and speed can be easily adjusted by changing the setting of the air cylinder. By adjusting the movement distance of the inner bottom surface forming portion and the pressure when the base paper is sandwiched between the inner bottom surface forming portion and the outer bottom surface forming portion, it is possible to optimally cope with containers of various shapes.

本発明の一実施形態に係る紙容器成形装置１００でプレス成形した紙容器２００の上面図及び側面断面図。The top view and side sectional drawing of the paper container 200 press-molded with the paper container shaping | molding apparatus 100 which concerns on one Embodiment of this invention. 本発明の一実施形態に係る紙容器成形装置１００の断面図。Sectional drawing of the paper container shaping | molding apparatus 100 which concerns on one Embodiment of this invention. 本発明の一実施形態に係る紙容器の成形方法の手順１乃至手順４を示す断面図。Sectional drawing which shows the procedure 1 thru | or procedure 4 of the shaping | molding method of the paper container which concerns on one Embodiment of this invention. 本発明の一実施形態に係る紙容器の成形方法の手順５乃至手順８を示す断面図。Sectional drawing which shows the procedure 5 thru | or procedure 8 of the shaping | molding method of the paper container which concerns on one Embodiment of this invention. 本発明の一実施形態に係る紙容器の成形方法の手順９乃至手順１２を示す断面図。Sectional drawing which shows the procedure 9 thru | or the procedure 12 of the shaping | molding method of the paper container which concerns on one Embodiment of this invention.

以下に、本発明の一実施形態に係る紙容器成形装置１００について、図面に基づいて説明する。
本発明の一実施形態に係る紙容器成形装置１００によって成形される紙容器２００は、図１に示すように、円形の底面２０１と、底面２０１から立ち上がった筒状の壁面２０３とを有しており、底面２０１には、紙容器２００に重量物を載せた際に底面２０１の変形を抑制する変形防止溝２０２が底面２０１の中心から半径方向外方に向かって放射状に設けられている。
また、壁面２０３の上端には、半径方向外方に向かって円筒状に丸められたカール部２０４が全周に渡って形成されている。 Below, the paper container shaping | molding apparatus 100 which concerns on one Embodiment of this invention is demonstrated based on drawing.
As shown in FIG. 1, a paper container 200 formed by the paper container forming apparatus 100 according to an embodiment of the present invention has a circular bottom surface 201 and a cylindrical wall surface 203 that rises from the bottom surface 201. In addition, the bottom surface 201 is provided with deformation preventing grooves 202 that suppress deformation of the bottom surface 201 when a heavy object is placed on the paper container 200, radially from the center of the bottom surface 201 radially outward.
Further, a curled portion 204 that is rounded in a cylindrical shape outward in the radial direction is formed at the upper end of the wall surface 203 over the entire circumference.

紙容器成形装置１００は、図２に示すように、上部ユニット１１０と、下部ユニット１２０とを有している。
上部ユニット１１０には、上部フレーム１１１と、平板状の原紙Ｐを押圧して紙容器２００の外面を形成するキャビティ１１２とが設けられ、下部ユニット１２０には、下部フレーム１２１と、原紙Ｐを押圧して紙容器２００の内面を形成するコア１２２と、下部移動部材１２７とが設けられている。
上部フレーム１１１と下部移動部材１２７は上下方向に移動可能に構成され、上部フレーム１１１の下端と下部移動部材１２７の上端とには、互いに接近し原紙Ｐの周囲を挟んでおさえる原紙ホルダー１３０が設けられている。 As illustrated in FIG. 2, the paper container forming apparatus 100 includes an upper unit 110 and a lower unit 120.
The upper unit 110 is provided with an upper frame 111 and a cavity 112 that presses the flat base paper P to form the outer surface of the paper container 200. The lower unit 120 presses the lower frame 121 and the base paper P. Thus, a core 122 forming the inner surface of the paper container 200 and a lower moving member 127 are provided.
The upper frame 111 and the lower moving member 127 are configured to be movable in the vertical direction, and a base paper holder 130 is provided at the lower end of the upper frame 111 and the upper end of the lower moving member 127 so as to be close to each other and sandwich the periphery of the base paper P. It has been.

キャビティ１１２は、紙容器２００の底面２０１の外面形状を形成する外底面形成部１１３と、紙容器２００の壁面２０３の外面形状を形成する外壁面形成部１１６とを有している。
外底面形成部１１３は、変形防止溝２０２の外面形状を形成する凹部１１４を有しているとともに、外底面駆動エアシリンダ１１５を介して上部フレーム１１１に接続され、コア１２２方向へ前後移動可能に構成されている。
また、外壁面形成部１１６は、スプリング１１７によってコア１２２方向へ付勢されている。 The cavity 112 has an outer bottom surface forming portion 113 that forms the outer surface shape of the bottom surface 201 of the paper container 200 and an outer wall surface forming portion 116 that forms the outer surface shape of the wall surface 203 of the paper container 200.
The outer bottom surface forming portion 113 has a recess 114 that forms the outer surface shape of the deformation preventing groove 202 and is connected to the upper frame 111 via the outer bottom surface driving air cylinder 115 so as to be movable back and forth in the direction of the core 122. It is configured.
Further, the outer wall surface forming portion 116 is urged toward the core 122 by the spring 117.

コア１２２は、紙容器２００の底面２０１の内面形状を形成する内底面形成部１２３と、紙容器２００の壁面２０３の内面形状を形成する内壁面形成部１２６とを有している。
内底面形成部１２３は、変形防止溝２０２の内面形状を形成する凸部１２４を有しているとともに、内底面駆動エアシリンダ１２５を介して下部フレーム１２１に接続され、キャビティ１１２方向へ前後移動可能に構成されている。
原紙ホルダー１３０には、紙容器２００のカール部２０４を形成するカーリング部材１３１が設けられている。 The core 122 has an inner bottom surface forming portion 123 that forms the inner surface shape of the bottom surface 201 of the paper container 200 and an inner wall surface forming portion 126 that forms the inner surface shape of the wall surface 203 of the paper container 200.
The inner bottom surface forming portion 123 has a convex portion 124 that forms the inner surface shape of the deformation preventing groove 202 and is connected to the lower frame 121 via the inner bottom surface driving air cylinder 125 and can move back and forth in the direction of the cavity 112. It is configured.
The base paper holder 130 is provided with a curling member 131 that forms the curled portion 204 of the paper container 200.

次に、上記紙容器成形装置１００を用いた本発明の一実施形態に係る紙容器２００の成形方法について、図３乃至図５を用いて説明する。
まず、図３の手順１に示すように、プレス成形用の所定のサイズにカットされた原紙Ｐをコア１２２の位置に合わせて下部ユニット１２０の上に載せる。このとき、外底面駆動エアシリンダ１１５は外底面形成部１１３をコア１２２方向へ付勢しており、外底面形成部１１３は外壁面形成部１１６との隣接部分よりもコア１２２側へ張り出している。
次に、図３の手順２に示すように、上部ユニット１１０を下降して下部ユニット１２０と当接させ、原紙ホルダー１３０によって原紙Ｐをおさえた後、図３の手順３に示すように、内底面駆動エアシリンダ１２５によって内底面形成部１２３を上方へ付勢し、内底面形成部１２３とともに原紙Ｐを上方へ押し出す。
このとき、原紙ホルダー１３０が原紙Ｐを挟み込む力よりも、内底面形成部１２３が原紙Ｐを上方へ押し出す力が強いため、原紙Ｐは内底面形成部１２３に押し出された分、原紙ホルダー１３０側からキャビティ１１２内へ材料が引き込まれていく。 Next, a method for forming a paper container 200 according to an embodiment of the present invention using the paper container forming apparatus 100 will be described with reference to FIGS.
First, as shown in the procedure 1 of FIG. 3, the base paper P cut into a predetermined size for press molding is placed on the lower unit 120 according to the position of the core 122. At this time, the outer bottom surface driving air cylinder 115 urges the outer bottom surface forming portion 113 toward the core 122, and the outer bottom surface forming portion 113 protrudes toward the core 122 side from a portion adjacent to the outer wall surface forming portion 116. .
Next, as shown in step 2 of FIG. 3, after the upper unit 110 is lowered and brought into contact with the lower unit 120 and the base paper P is held by the base paper holder 130, the inner unit is set as shown in step 3 of FIG. The bottom driving air cylinder 125 urges the inner bottom surface forming portion 123 upward, and pushes the base paper P together with the inner bottom surface forming portion 123.
At this time, since the inner bottom surface forming portion 123 has a stronger force to push the base paper P upward than the force that the base paper holder 130 sandwiches the base paper P, the base paper P is pushed by the inner bottom surface forming portion 123, and thus the base paper holder 130 side The material is drawn into the cavity 112 from the inside.

さらに、図３の手順４に示すように、上部ユニット１１０を押し下げると、下部移動部材１２７も下方へ下がるため、相対的にコア１２２がキャビティ１１２方向へ移動する。そのため、原紙Ｐは内底面形成部１２３によってさらにキャビティ１１２方向へ押し出される力を受ける。このとき、内壁面形成部１２６から内底面形成部１２３が離脱するように移動して原紙Ｐを押し出しているため、原紙Ｐは内底面形成部１２３以外にコア１２２及びキャビティ１１２との接触箇所を少なくできるため、原紙Ｐは余計な摩擦抵抗を受けることがなく、キャビティ１１２内へ、特に外底面形成部１１３側へより多くの材料を引き込むことができる。   Further, as shown in step 4 of FIG. 3, when the upper unit 110 is pushed down, the lower moving member 127 is also lowered, so that the core 122 relatively moves toward the cavity 112. Therefore, the base paper P receives a force pushed further toward the cavity 112 by the inner bottom surface forming portion 123. At this time, since the base paper P is pushed out by moving so that the inner bottom surface forming portion 123 is detached from the inner wall surface forming portion 126, the base paper P has a contact portion with the core 122 and the cavity 112 in addition to the inner bottom surface forming portion 123. Since it can be reduced, the base paper P is not subjected to excessive frictional resistance, and more material can be drawn into the cavity 112, particularly toward the outer bottom surface forming portion 113 side.

さらに上部ユニット１１０を押し下げると、図４の手順５に示すように、外底面形成部１１３と内底面形成部１２３とで原紙Ｐを挟む。なお、予め外底面駆動エアシリンダ１１５よりも内底面駆動エアシリンダ１２５の方が強い力で内底面形成部１２３を押し出すように設定、あるいは、タイミングを合わせて外底面駆動エアシリンダ１１５の付勢力を低下させることで、外底面形成部１１３は上方へ押し戻されて、内底面形成部１２３は外壁面形成部１１６が内底面形成部１２３と原紙Ｐを挟む位置まで移動する。   When the upper unit 110 is further pushed down, the base paper P is sandwiched between the outer bottom surface forming portion 113 and the inner bottom surface forming portion 123 as shown in the procedure 5 of FIG. It should be noted that the inner bottom surface driving air cylinder 125 is set to push the inner bottom surface forming portion 123 with a stronger force than the outer bottom surface driving air cylinder 115 in advance, or the urging force of the outer bottom surface driving air cylinder 115 is adjusted at the same timing. By lowering, the outer bottom surface forming portion 113 is pushed back upward, and the inner bottom surface forming portion 123 moves to a position where the outer wall surface forming portion 116 sandwiches the inner bottom surface forming portion 123 and the base paper P.

その後、内底面駆動エアシリンダ１２５を下方に付勢し、内底面形成部１２３を内壁面形成部１２６方向へ引き戻すことで、原紙Ｐにかかっていた引張力を一度取り除く。
次に、キャビティ１１２を下げることで、図４の手順６に示すように、キャビティ１１２と内底面形成部１２３とで原紙Ｐを挟み込み、容器の底面２０１が成型されはじめる。
このように、容器の底面２０１を成型する直前に原紙Ｐにかかっていた引張力を一度取り除いてから原紙Ｐをキャビティ１１２と内底面形成部１２３とで挟み込むことによって、原紙Ｐの底面２０１形成部付近へ材料が集まりやすくなるため、底面２０１に凹凸を有した変形防止溝２０２が設けられている場合であっても、原紙Ｐが破れることなく成型できる。 Thereafter, the inner bottom surface driving air cylinder 125 is urged downward, and the inner bottom surface forming portion 123 is pulled back toward the inner wall surface forming portion 126, whereby the tensile force applied to the base paper P is once removed.
Next, by lowering the cavity 112, the base paper P is sandwiched between the cavity 112 and the inner bottom surface forming portion 123, as shown in the procedure 6 of FIG.
In this way, by removing the tensile force applied to the base paper P just before molding the bottom surface 201 of the container and then sandwiching the base paper P between the cavity 112 and the inner bottom surface forming portion 123, the bottom surface 201 forming portion of the base paper P Since the material easily gathers in the vicinity, the base paper P can be molded without being torn even when the bottom surface 201 is provided with the deformation preventing groove 202 having irregularities.

この状態で上部ユニット１１０をさらに押し下げると、図４の手順７に示すように、上部フレーム１１１によってキャビティ１１２全体が下方へ押し下げられ、原紙Ｐのコア１２２とキャビティ１１２とに挟み込まれた箇所がほぼ同時にプレス成形されるとともに、原紙Ｐが原紙ホルダー１３０から抜け、内壁面形成部１２６の側面へ完全に引き込まれる。このとき、外底面駆動エアシリンダ１１５と内底面駆動エアシリンダ１２５はどちらも力を発生していない。
このように、原紙Ｐを容器形状に挟み込む直前に、外底面形成部１１３及び内底面形成部１２３が移動することで、コア１２２及びキャビティ１１２全体がほぼ同時に原紙Ｐを挟み込むことができ、原紙Ｐに大きな引張力を与えることがなく、紙容器２００全体の形成に必要な材料を供給でき、その後のプレス成形の際に紙容器２００の底面や壁部が局所的に薄くなったり、破れるなどの成形不良を防止できる。
プレス成形後、下部移動部材１２７を上方へ移動させる。これによって、上部フレーム１１１及びカーリング部材１３１を下部移動部材１２７に押し上げられるように上方へ移動させると、カーリング部材１３１に原紙Ｐの外周端が入り込み、図４の手順８に示すように、上部ユニット１１０の移動に合わせてカール部２０４を形成していく。 When the upper unit 110 is further pushed down in this state, the entire cavity 112 is pushed downward by the upper frame 111 as shown in Step 7 of FIG. 4, and the portion sandwiched between the core 122 and the cavity 112 of the base paper P is almost the same. At the same time, it is press-molded, and the base paper P comes out of the base paper holder 130 and is completely drawn into the side surface of the inner wall surface forming portion 126. At this time, neither the outer bottom surface driving air cylinder 115 nor the inner bottom surface driving air cylinder 125 generates force.
As described above, the outer bottom surface forming portion 113 and the inner bottom surface forming portion 123 move immediately before the base paper P is sandwiched in the container shape, so that the core 122 and the entire cavity 112 can sandwich the base paper P almost simultaneously. The material necessary for forming the entire paper container 200 can be supplied without applying a large tensile force to the paper container 200, and the bottom and walls of the paper container 200 are locally thinned or broken during subsequent press molding. Molding defects can be prevented.
After press molding, the lower moving member 127 is moved upward. Accordingly, when the upper frame 111 and the curling member 131 are moved upward so as to be pushed up by the lower moving member 127, the outer peripheral edge of the base paper P enters the curling member 131, and as shown in the procedure 8 of FIG. The curled portion 204 is formed in accordance with the movement of 110.

このとき、外底面駆動エアシリンダ１１５は外底面形成部１１３を付勢しておらず、外壁面形成部１１６のみスプリング１１７によって下方へ付勢されるため、上部ユニット１１０が上方へ移動するに従って、図５の手順９に示すように、プレス成形された原紙Ｐ（紙容器２００）から外底面形成部１１３が離脱する。
上部ユニット１１０が十分に上方へ移動し、上部ユニット１１０と下部ユニット１２０とが離れた状態で、図５の手順１０に示すように、外底面駆動エアシリンダ１１５によって外底面形成部１１３を下方へ付勢すると、図５の手順１１に示すように、外底面形成部１１３がプレス成形された原紙Ｐ（紙容器２００）を外壁面形成部１１６から離脱させることによって、図５の手順１２に示すように、キャビティ１１２からプレス成形された原紙Ｐ（紙容器２００）を簡単に取り出すことができる。 At this time, the outer bottom surface driving air cylinder 115 does not bias the outer bottom surface forming portion 113, and only the outer wall surface forming portion 116 is biased downward by the spring 117. Therefore, as the upper unit 110 moves upward, As shown in step 9 of FIG. 5, the outer bottom surface forming portion 113 is detached from the press-formed base paper P (paper container 200).
With the upper unit 110 sufficiently moved upward and the upper unit 110 and the lower unit 120 separated from each other, the outer bottom surface forming portion 113 is moved downward by the outer bottom surface driving air cylinder 115 as shown in the procedure 10 of FIG. When energized, the base paper P (paper container 200) on which the outer bottom surface forming portion 113 is press-molded is separated from the outer wall surface forming portion 116 as shown in the step 11 of FIG. Thus, the base paper P (paper container 200) press-molded from the cavity 112 can be easily taken out.

以上、本発明の実施形態を詳述したが、本発明は上記実施形態に限定されるものではなく、特許請求の範囲に記載された本発明を逸脱することなく種々の設計変更を行うことが可能である。
なお、上述した実施形態では、紙容器は円形の底面及び外周面を有しているものとして説明したが、紙容器の形状はこれに限定されず、例えば、底面の外周の一部が直線状に形成されていてもよく、外周面の一部が半径方向外方に鍔状に張り出して形成されていてもよい。
また、上述した実施形態では、底面の外面側に張り出した変形防止溝が底面の中心から半径方向外方に向かって放射状に設けられているものとして説明したが、変形防止溝の形状はこれに限定されず、例えば、底面の内面側に張り出す渦巻き型の溝状に設けられていてもよく、変形防止溝がなくてもよい。 As mentioned above, although embodiment of this invention was explained in full detail, this invention is not limited to the said embodiment, A various design change can be made without deviating from this invention described in the claim. Is possible.
In the above-described embodiment, the paper container has been described as having a circular bottom surface and an outer peripheral surface. However, the shape of the paper container is not limited to this, and for example, a part of the outer periphery of the bottom surface is linear. Alternatively, a part of the outer peripheral surface may be formed so as to protrude outward in the radial direction.
Further, in the above-described embodiment, the deformation preventing groove that protrudes to the outer surface side of the bottom surface is described as being radially provided from the center of the bottom surface in the radial direction outward, but the shape of the deformation preventing groove is It is not limited, For example, it may be provided in the shape of the spiral groove | channel projected on the inner surface side of a bottom face, and there may not be a deformation | transformation prevention groove | channel.

また、上述した実施形態では、原紙ホルダーからキャビティ内へ原紙を引き込む際、内底面駆動エアシリンダによって内底面形成部を上方へ付勢し、内底面形成部とともに原紙を上方へ押し出すものとして説明したが、原紙をキャビティ内へ引き込む手順はこれに限定されず、例えば、予めキャビティ方向へ付勢された内底面形成部と同じ高さで原紙を原紙ホルダーでおさえてから、原紙ホルダーとともにキャビティを内底面形成部方向へ移動させることで、原紙を内底面形成部に押し付けながら相対的にキャビティ内へ引き込んでもよく、さらに、内底面駆動エアシリンダによって内底面形成部をキャビティ側へ移動させるとともにキャビティを内底面形成部側へ移動させることで、原紙をキャビティ内へ引き込んでもよい。
また、上述した実施形態では、プレス成形用の所定のサイズにカットされた原紙を供給しているものとして説明したが、原紙の供給時の状態はこれに限定されず、例えば、原紙ホルダーの外周面にカッターを設け、紙容器成形装置に連続して供給される帯状の原紙を原紙ホルダーでおさえながらカッターでプレス成形用の所定のサイズにカットしてもよい。
また、上述した実施形態では、外底面形成部及び内底面形成部はエアシリンダによって付勢され、外壁面形成部はスプリングによって付勢されるものとして説明したが、付勢する方法はこれに限定されず、例えば、油圧シリンダを用いて付勢してもよく、サーボモータとスライダを用いて位置決め制御を行って各部を移動させてもよい。 In the above-described embodiment, when the base paper is drawn from the base paper holder into the cavity, the inner bottom surface forming portion is urged upward by the inner bottom surface driving air cylinder, and the base paper is pushed upward together with the inner bottom surface forming portion. However, the procedure for pulling the base paper into the cavity is not limited to this.For example, after holding the base paper with the base paper holder at the same height as the inner bottom surface forming portion biased in the cavity direction, the cavity is inserted together with the base paper holder. By moving the base paper toward the bottom surface forming portion, the base paper may be relatively pulled into the cavity while pressing the inner bottom surface forming portion, and the inner bottom surface driving portion is moved to the cavity side by the inner bottom surface driving air cylinder and the cavity is moved. The base paper may be drawn into the cavity by moving to the inner bottom surface forming portion side.
In the above-described embodiment, the base paper that has been cut into a predetermined size for press molding is described as being supplied. However, the state when the base paper is supplied is not limited to this, for example, the outer periphery of the base paper holder. A cutter may be provided on the surface, and the belt-like base paper continuously supplied to the paper container forming apparatus may be cut into a predetermined size for press molding with a cutter while holding the base paper holder.
In the above-described embodiment, the outer bottom surface forming portion and the inner bottom surface forming portion are biased by the air cylinder, and the outer wall surface forming portion is biased by the spring. However, the biasing method is limited to this. For example, it may be energized using a hydraulic cylinder, or each part may be moved by performing positioning control using a servo motor and a slider.

また、上述した実施形態では、キャビティは別体として設けられた外底面形成部と外壁面形成部とによって構成されているものとして説明したが、キャビティの構成はこれに限定されず、例えば、外底面形成部と外壁面形成部とが一体に形成されていてもよく、外底面形成部と外壁面形成部との間に、別体として外周縁形成部を設けて構成してもよい。
また、上述した実施形態では、下部移動部材が上下方向移動可能に構成されているものとして説明したが、下部ユニットの構成はこれに限定されず、例えば、下部移動部材が位置固定され、コア全体が下部移動部材に対して相対的に上下方向移動可能に構成されていてもよい。 In the above-described embodiment, the cavity is described as being configured by the outer bottom surface forming portion and the outer wall surface forming portion that are provided separately. However, the configuration of the cavity is not limited to this. The bottom surface forming portion and the outer wall surface forming portion may be formed integrally, or an outer peripheral edge forming portion may be provided as a separate body between the outer bottom surface forming portion and the outer wall surface forming portion.
In the above-described embodiment, the lower moving member is described as being configured to be movable in the vertical direction. However, the configuration of the lower unit is not limited to this. For example, the position of the lower moving member is fixed and the entire core is fixed. May be configured to be movable in the vertical direction relative to the lower moving member.

１００ ・・・ 紙容器成形装置
１１０ ・・・ 上部ユニット
１１１ ・・・ 上部フレーム
１１２ ・・・ キャビティ
１１３ ・・・ 外底面形成部
１１４ ・・・ 凹部
１１５ ・・・ 外底面駆動エアシリンダ
１１６ ・・・ 外壁面形成部
１１７ ・・・ スプリング
１２０ ・・・ 下部ユニット
１２１ ・・・ 下部フレーム
１２２ ・・・ コア
１２３ ・・・ 内底面形成部
１２４ ・・・ 凸部
１２５ ・・・ 内底面駆動エアシリンダ
１２６ ・・・ 内壁面形成部
１２７ ・・・ 下部移動部材
１３０ ・・・ 原紙ホルダー
１３１ ・・・ カーリング部材
２００ ・・・ 紙容器
２０１ ・・・ 底面
２０２ ・・・ 変形防止溝
２０３ ・・・ 壁面
２０４ ・・・ カール部 DESCRIPTION OF SYMBOLS 100 ... Paper container molding apparatus 110 ... Upper unit 111 ... Upper frame 112 ... Cavity 113 ... Outer bottom surface formation part 114 ... Recessed part 115 ... Outer bottom surface drive air cylinder 116 ...・ Outer wall surface forming part 117 ・ ・ ・ Spring 120 ・ ・ ・ Lower unit 121 ・ ・ ・ Lower frame 122 ・ ・ ・ Core 123 ・ ・ ・ Inner bottom surface forming part 124 ・ ・ ・ Convex part 125 ・ ・ ・ Inner bottom surface driving air cylinder 126 ... Inner wall surface forming part 127 ... Lower moving member 130 ... Base paper holder 131 ... Curling member 200 ... Paper container 201 ... Bottom face 202 ... Deformation prevention groove 203 ... Wall surface 204 ・ ・ ・ Curled part

Claims (6)

底面と、前記底面から立ち上がった筒状の壁部とを有した紙容器を成形するものであり、
紙容器の外面を成形するキャビティと前記紙容器の内面を成形するコアとの間に置いた平板状の原紙の周囲をおさえ、前記キャビティと前記コアとを接近する方向に相対的に移動させて前記原紙を周囲から変形させつつ引き込んだ後、前記コアと前記キャビティとで変形した前記原紙を挟み、さらに圧縮成形する紙容器の成形方法であって、
前記コアには、内底面形成部と、内壁面形成部とが設けられ、
前記内底面形成部は、前記キャビティ方向へ前記内壁面形成部と相対的に駆動可能に構成され、
前記原紙をおさえた後に、前記内底面形成部によって、前記原紙を前記キャビティ方向へ押し出すことを特徴とする、紙容器を成形する成形方法。 Molding a paper container having a bottom surface and a cylindrical wall portion rising from the bottom surface;
Hold the periphery of the flat base paper placed between the cavity forming the outer surface of the paper container and the core forming the inner surface of the paper container, and move the cavity and the core relatively in the approaching direction. After drawing the base paper while deforming it from the surroundings, sandwiching the base paper deformed by the core and the cavity, further forming a paper container for compression molding,
The core is provided with an inner bottom surface forming portion and an inner wall surface forming portion,
The inner bottom surface forming portion is configured to be drivable relative to the inner wall surface forming portion in the cavity direction,
A molding method for molding a paper container, wherein after pressing the base paper, the base paper is pushed out toward the cavity by the inner bottom surface forming portion. 前記キャビティと前記内底面形成部とで前記原紙を挟みながら、圧縮成形直前に前記内底面形成部を前記内壁面形成部方向へ移動することを特徴とする、請求項１に記載の紙容器を成形する成形方法。   2. The paper container according to claim 1, wherein the inner bottom surface forming portion is moved toward the inner wall surface forming portion immediately before compression molding while sandwiching the base paper between the cavity and the inner bottom surface forming portion. Molding method to mold. 前記キャビティには、外底面形成部と、外壁面形成部とが設けられ、
前記外底面形成部が前記外壁面形成部から前記コア方向へ突出したまま前記原紙を引き込みつつ、前記原紙を前記外底面形成部と前記内底面形成部とで挟み、
前記内底面形成部を前記内壁面形成部方向へ移動する直前、直後、あるいは同時に、前記外底面形成部が前記外壁面形成部側に相対的に移動することを特徴とする、請求項１または請求項２に記載の紙容器を成形する成形方法。 The cavity is provided with an outer bottom surface forming portion and an outer wall surface forming portion,
While pulling the base paper while the outer bottom surface forming portion protrudes from the outer wall surface forming portion toward the core, the base paper is sandwiched between the outer bottom surface forming portion and the inner bottom surface forming portion,
2. The outer bottom surface forming portion relatively moves toward the outer wall surface forming portion immediately before, immediately after, or simultaneously with the movement of the inner bottom surface forming portion toward the inner wall surface forming portion. A molding method for molding the paper container according to claim 2. 底面と、前記底面から立ち上がった筒状の壁部とを有した紙容器を成形する成形装置であって、
該成形装置は、平板状の原紙を押圧して紙容器の内面を形成するコアと、前記原紙を押圧して紙容器の外面を形成するキャビティと、前記原紙の周囲をおさえる原紙ホルダーとを有し、
前記コアは、内底面形成部と、内壁面形成部とを有し、
前記内底面形成部は、前記内壁面形成部から離脱して前記キャビティ方向へ相対的に前後駆動可能に構成されており、
前記キャビティは、前記コア方向へ相対的に前後駆動可能に構成されていることを特徴とする、紙容器を成形する成形装置。 A molding apparatus for molding a paper container having a bottom surface and a cylindrical wall portion rising from the bottom surface,
The molding apparatus includes a core that presses a flat base paper to form an inner surface of the paper container, a cavity that presses the base paper to form an outer surface of the paper container, and a base paper holder that holds the periphery of the base paper. And
The core has an inner bottom surface forming portion and an inner wall surface forming portion,
The inner bottom surface forming part is configured to be able to be driven back and forth relatively in the cavity direction by separating from the inner wall surface forming part,
The molding apparatus for molding a paper container, wherein the cavity is configured to be relatively movable back and forth in the core direction. 前記キャビティは、外底面形成部と、外壁面形成部とを有し、
前記外底面形成部は、前記外壁面形成部から離脱して前記コア方向へ相対的に前後駆動可能に構成されていることを特徴とする、請求項４に記載の紙容器を成形する成形装置。 The cavity has an outer bottom surface forming portion and an outer wall surface forming portion,
5. The molding apparatus for molding a paper container according to claim 4, wherein the outer bottom surface forming portion is configured to be separated from the outer wall surface forming portion and be relatively driven back and forth in the core direction. . 前記内底面形成部には、駆動部としてエアシリンダが設けられていることを特徴とする、請求項４または請求項５に記載の紙容器を成形する成形装置。   6. The molding apparatus for molding a paper container according to claim 4, wherein the inner bottom surface forming portion is provided with an air cylinder as a driving portion.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022088580A1 (en) * 2020-10-30 2022-05-05 上海爵诺科技有限公司 High-speed cantilever-type mold opening and closing transmission mechanism

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4038023A1 (en) * 1990-11-29 1992-06-04 Markhorst Holland Prodn. method for twin or multi-shell container from cardboard - uses base frame with at least two male and female die assemblies
JPH10235757A (en) * 1997-02-28 1998-09-08 Iwai Tsusho Kk Device and method for manufacturing paper container
JPH11138663A (en) * 1997-11-14 1999-05-25 Toppan Printing Co Ltd Method and apparatus for assembling paper tray-like container

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4038023A1 (en) * 1990-11-29 1992-06-04 Markhorst Holland Prodn. method for twin or multi-shell container from cardboard - uses base frame with at least two male and female die assemblies
JPH10235757A (en) * 1997-02-28 1998-09-08 Iwai Tsusho Kk Device and method for manufacturing paper container
JPH11138663A (en) * 1997-11-14 1999-05-25 Toppan Printing Co Ltd Method and apparatus for assembling paper tray-like container

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022088580A1 (en) * 2020-10-30 2022-05-05 上海爵诺科技有限公司 High-speed cantilever-type mold opening and closing transmission mechanism

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