WO2019188870A1 - Method for manufacturing paper container - Google Patents
Method for manufacturing paper container Download PDFInfo
- Publication number
- WO2019188870A1 WO2019188870A1 PCT/JP2019/012306 JP2019012306W WO2019188870A1 WO 2019188870 A1 WO2019188870 A1 WO 2019188870A1 JP 2019012306 W JP2019012306 W JP 2019012306W WO 2019188870 A1 WO2019188870 A1 WO 2019188870A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bottom member
- container
- paper container
- shape
- paper
- Prior art date
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B31—MAKING ARTICLES OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER; WORKING PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B—MAKING CONTAINERS OF PAPER, CARDBOARD OR MATERIAL WORKED IN A MANNER ANALOGOUS TO PAPER
- B31B50/00—Making rigid or semi-rigid containers, e.g. boxes or cartons
- B31B50/59—Shaping sheet material under pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D3/00—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines
- B65D3/10—Rigid or semi-rigid containers having bodies or peripheral walls of curved or partially-curved cross-section made by winding or bending paper without folding along defined lines characterised by form of integral or permanently secured end closure
- B65D3/12—Flanged discs permanently secured, e.g. by adhesives or by heat-sealing
- B65D3/14—Discs fitting within container end and secured by bending, rolling, or folding operations
Definitions
- the present invention relates to a method for manufacturing a paper container. More specifically, it relates to a method for manufacturing a bowl-shaped paper container.
- polystyrene cups have been used as cups for instant noodles.
- the polystyrene cup has a problem that it is vulnerable to impacts and easily breaks during the distribution process. For this reason, recently, paper containers have been widely used.
- the shape of the paper container As the shape of the paper container, an inverted frustoconical shape is generally used, but in recent years, the shape of the paper container is also required to be diversified in accordance with the diversification of food.
- a method of forming a paper container by combining several parts a method of forming a paper container by pressing one base paper, or a method of forming a paper container by combining these (For example, refer to Patent Documents 1 and 2).
- An object of the present invention is to provide a manufacturing method for reproducing a shape having a curved surface such as a bowl shape or a bowl shape with a paper container.
- the present invention is a method for manufacturing a paper container comprising a trunk member and a bottom member which are mainly made of paper and have a thermoplastic resin at least on the inner surface side of the container. And a barrel member molding step for molding the barrel member into an inverted truncated cone shape or cylinder shape with the lower end portion released, and the outer peripheral edge of the bottom member is bent so as to form a deep dish, and the outer peripheral edge of the bottom member is sandwiched The bottom part of the body member is folded inward, and the joint is formed by thermocompression bonding, and the bottom part of the bottom member is recessed so as to protrude downward beyond the joint.
- a manufacturing method is provided.
- a shape having a curved surface such as a bowl or bowl can be reproduced with a paper container.
- a container shape can be diversified.
- FIG. 1 is a cross-sectional view of the paper container 1 manufactured by the manufacturing method according to the present embodiment.
- 2 to 4 are schematic explanatory diagrams for explaining the manufacturing method according to the present embodiment.
- the same referential mark is attached
- the embodiment described below is merely an example, and does not limit the use of other known techniques.
- the paper container 1 manufactured by the manufacturing method according to the present embodiment is configured by combining separate members including the body member 10 and the bottom member 20.
- the paper container 1 according to the present embodiment has a substantially inverted truncated cone shape.
- FIG. 2 shows a developed base paper constituting the body member 10.
- this base paper a paperboard having a predetermined thickness and basis weight is used.
- the thickness of the base paper is arbitrarily selected depending on the size of the container used, the contents to be filled, and the like.
- the basis weight of the base paper is preferably provided with a basis weight of 180 to 350 g / m 2 depending on the form of the finished container.
- polyethylene films are laminated on both sides of the base paper in order to impart water resistance.
- a molten resin may be used instead of the polyethylene film.
- the “thermoplastic resin” described in the claims is a concept including a polyethylene film and a molten resin.
- the body member 10 made of the base paper having the shape shown in FIG.
- the diameter of the paper container 1 according to this embodiment is preferably 135 mm to 150 mm.
- the angle formed by the inverted truncated cone body member 10 and the perpendicular (hereinafter referred to as “taper angle”) is preferably about 8 ° to 12 °. If the taper angle is less than 8 °, it does not look like a bowl or bowl. On the other hand, when the taper angle is larger than 12 °, it is difficult to join the outer peripheral edge of the bottom member described later.
- the bottom member 20 for assembling the bottom of the paper container 1 will be described.
- the bottom portion refers to the bottom member 20 formed into a predetermined shape.
- the bottom member 20 is made of a base paper like the trunk member 10. It is preferable that a ruled line 30 is provided on the outer peripheral portion of the bottom member 20.
- the bottom member 20 is circular, and ruled lines 30 that extend radially along the circumferential direction are provided. In the present embodiment, a plurality of ruled lines 30 having different lengths are configured. By applying a ruled line process to the base paper, wrinkles can be prevented from occurring during the bottom molding. About 100 to 200 ruled lines 30 are preferably arranged radially.
- the number of the ruled lines 30 is too small, a large number of wrinkles may be derived at the time of molding, which may reduce the appearance aesthetics. On the other hand, if the number of ruled lines 30 is too large, the physical strength of the base paper may be reduced.
- the outer peripheral edge 21 of the bottom member 20 on which three types of ruled lines 30 having different lengths are formed is bent by drawing to form a deep dish shape.
- the distance from the bottom surface of the bottom member 20 to the outer peripheral edge 21 is preferably 20 mm to 36 mm. If it is less than 20 mm, the bottom surface portion of the bottom member 20 cannot be sufficiently protruded downward in the bottom member processing step described later. On the other hand, if it exceeds 36 mm, molding becomes difficult.
- the lower end portion 11 of the barrel member 10 formed in an inverted frustoconical shape is bent inward, the outer peripheral edge 21 of the bottom member 20 formed in a deep dish shape is sandwiched, and then heated by a heater or the like to be a barrel member.
- 10 and the bottom member 20 are thermocompression bonded to form the joint 40 (see FIG. 3). Thereby, it can prevent that water and hot water leak from the inside of a container.
- the trunk member and the bottom member there is the following method.
- the lower end portion of the body member is bent inward, and the outer peripheral edge of the bottom member is bent outward. And the bent part of both is fitted. Then, the fitting part is heated and thermocompression bonded.
- the container can be molded by such a method as well, care should be taken because there is a risk of causing poor adhesion due to the thickness of the fitting parts if they are to be thermally welded together.
- it is the method of this invention since it does not heat-press at a time, it is hard to generate
- the curled portion 50 is formed on the upper end of the body member 10.
- a method for forming the curled portion 50 a method similar to a conventionally widely used forming method can be used. Moreover, you may make a curled part square shape as needed.
- the timing for forming the curled portion 50 is not particularly limited as long as it is after the body member 10 is formed into an inverted truncated cone shape.
- the bottom shape of the bottom member 20 is processed.
- the bottom member 20 may be press-molded from the inside of the container so that the bottom portion protrudes beyond the lower end surface formed by the lower end of the trunk portion with a core having a desired shape (see FIG. 4). Thereby, the bottom part which protruded inside the container is reversed, and it can be made into a bowl shape or a bowl shape.
- the overall height of the container is preferably about 70 mm to 80 mm with respect to the diameter of 135 to 150 mm.
- the distance from the upper end of the joint 40 to the bottom surface of the bottom member 20 is preferably 15 mm to 22 mm.
- the ratio of the distance from the upper end of the joint 40 to the bottom surface of the bottom member 20 at the height of the entire container is preferably 20-30%.
- the distance from the lower end of the joint 40 to the bottom surface of the bottom member 20 is preferably 7 mm to 14 mm.
- the ratio of the distance from the lower end of the joint 40 to the bottom surface of the bottom member 20 at the height of the entire container is preferably 10 to 20%.
- the protruding distance can be in the above range.
- count of pushing the bottom member 20 from the container inner side with a core is not restrict
- the joint 40 when the bottom member 20 is pressed, the joint 40 may be press-molded using a mold. By performing press molding on the joint 40, the joint 40 can be inclined. Thereby, roundness can be given to the external appearance shape of the trunk
- a shape having a curved surface such as a bowl or bowl can be reproduced with a paper container. Further, since the overlapping portions of the layers are not heat-pressed at a time, poor adhesion is unlikely to occur. Furthermore, it is possible to diversify shapes that can be reproduced with a paper container.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Making Paper Articles (AREA)
Abstract
[Problem] The purpose of the present invention is to provide a method for manufacturing a paper container in which creasing of the container surface does not readily occur and which has curved surfaces provided with a bottom rim. [Solution] A method for manufacturing a paper container having paper as the primary material, at least the inner-surface side of the container being provided with a thermoplastic resin, and the paper container comprising a body member and a bottom member, wherein the method for manufacturing a paper container is characterized by including: a body member forming step for forming the body member so as to have a tubular shape or a reverse truncated-cone shape in which the upper-end part and the lower-end part of the body member are free; a joining part forming step for bending the outer-peripheral edge of the bottom member so as to have a high-rimmed dish shape, folding the lower-end part of the body member inward so as to sandwich the outer-peripheral edge of the bottom member, and performing thermal pressure-bonding to form a joined part. The bottom-surface part of the bottom member is recessed so as to protrude downward beyond the joined part. FIG. 1
Description
本発明は、紙製容器の製造方法に関する。より詳しくは、丼型の紙製容器の製造方法に関する
The present invention relates to a method for manufacturing a paper container. More specifically, it relates to a method for manufacturing a bowl-shaped paper container.
従来から、即席麺用のカップには、ポリスチレンカップが利用されていた。
しかしながら、ポリスチレンカップは、衝撃に弱く、流通過程等で破損し易いという課題があった。このため、最近では、紙製容器が広く利用されている。 Conventionally, polystyrene cups have been used as cups for instant noodles.
However, the polystyrene cup has a problem that it is vulnerable to impacts and easily breaks during the distribution process. For this reason, recently, paper containers have been widely used.
しかしながら、ポリスチレンカップは、衝撃に弱く、流通過程等で破損し易いという課題があった。このため、最近では、紙製容器が広く利用されている。 Conventionally, polystyrene cups have been used as cups for instant noodles.
However, the polystyrene cup has a problem that it is vulnerable to impacts and easily breaks during the distribution process. For this reason, recently, paper containers have been widely used.
紙製容器の形状としては逆円錐台形状が一般的に用いられているが、近年、食の多様化などに合わせて、紙製容器の形状についても多様化が求められている。例えば、いくつかのパーツを組み合わせて紙製容器を成形する方法や、一枚の原紙をプレス加工して紙製容器を成形する方法、又はこれらを組み合わせて紙製容器を成形する方法等がある(例えば、特許文献1,2参照)。
As the shape of the paper container, an inverted frustoconical shape is generally used, but in recent years, the shape of the paper container is also required to be diversified in accordance with the diversification of food. For example, there are a method of forming a paper container by combining several parts, a method of forming a paper container by pressing one base paper, or a method of forming a paper container by combining these (For example, refer to Patent Documents 1 and 2).
ところで、紙製容器を用いたことで新たな課題も生じている。従来、ポリスチレンカップはプレス成型で成形されていたため、お椀型や丼型などの曲面のある容器の製造に適していた。しかし、原紙をプレス加工してお椀型や丼型に加工した場合、容器表面に皺が入ってしまうといった問題が新たに生じる。また、お椀型や丼型の形状に糸尻をつけることができないといった問題も生じる。さらに、複雑な形状になるほど装置が煩雑となり、製造コストがかかるといった問題も生じる。そのため、お椀型や丼型形状の紙製容器としてはいまだ満足のいくものが得られていない。
By the way, the use of paper containers creates new challenges. Conventionally, polystyrene cups were formed by press molding, and thus were suitable for manufacturing containers with curved surfaces such as bowls and bowls. However, when the base paper is pressed and processed into a bowl or bowl, a new problem arises that wrinkles enter the container surface. Further, there arises a problem that the thread tail cannot be attached to the bowl shape or the bowl shape. Furthermore, the more complicated the shape is, the more complicated the apparatus becomes, resulting in a problem of increased manufacturing costs. Therefore, satisfactory products have not yet been obtained as bowl-shaped or bowl-shaped paper containers.
本発明の課題は、お椀型や丼型のような曲面を備えた形状を紙製容器で再現する製造方法を提供することにある。
An object of the present invention is to provide a manufacturing method for reproducing a shape having a curved surface such as a bowl shape or a bowl shape with a paper container.
上記課題解決のため、本発明は、紙を主材料とし、少なくとも容器の内面側に熱可塑性樹脂を備える胴部材と底部材とからなる紙製容器の製造方法であって、胴部材の上端部と下端部が解放された逆円錐台状または筒状に胴部材を成形する胴部材成形工程と、底部材の外周縁を深皿状になるように屈曲させ、該底部材の外周縁を挟み込むように胴部材の下端部を内側に折り込み、加熱圧着して接合部を成形する接合部成形工程と、底部材の底面部が接合部を超えて下方に突出するように凹ませる、紙製容器の製造方法を提供する。
In order to solve the above-mentioned problems, the present invention is a method for manufacturing a paper container comprising a trunk member and a bottom member which are mainly made of paper and have a thermoplastic resin at least on the inner surface side of the container. And a barrel member molding step for molding the barrel member into an inverted truncated cone shape or cylinder shape with the lower end portion released, and the outer peripheral edge of the bottom member is bent so as to form a deep dish, and the outer peripheral edge of the bottom member is sandwiched The bottom part of the body member is folded inward, and the joint is formed by thermocompression bonding, and the bottom part of the bottom member is recessed so as to protrude downward beyond the joint. A manufacturing method is provided.
本発明により、お椀型や丼型のような曲面を備えた形状を紙製容器で再現することができる。これにより、容器形状を多様化させることができる。
According to the present invention, a shape having a curved surface such as a bowl or bowl can be reproduced with a paper container. Thereby, a container shape can be diversified.
以下、本発明を実施するための好適な形態について図面を参照しながら説明する。ここで、図1は、本実施形態にかかる製造方法で製造された紙製容器1の断面図である。図2~4は、本実施形態に係る製造方法を説明するための概略説明図である。なお、以下のすべての図面を通じて同一又は相当する要素には同一の参照符号を付しており、その重複する説明を省略する場合がある。また、以下に説明する実施形態は一例を示したものにすぎず、他の公知技術を自由に用いることを制限するものではない。
Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. Here, FIG. 1 is a cross-sectional view of the paper container 1 manufactured by the manufacturing method according to the present embodiment. 2 to 4 are schematic explanatory diagrams for explaining the manufacturing method according to the present embodiment. In addition, the same referential mark is attached | subjected to the element which is the same or it corresponds through all the following drawings, The duplicate description may be abbreviate | omitted. In addition, the embodiment described below is merely an example, and does not limit the use of other known techniques.
本実施形態にかかる製造方法で製造された紙製容器1は、胴部材10と底部材20からなる別々の部材を組み合わせることで構成されている。また、本実施形態にかかる紙製容器1は、略逆円錐台状となっている。
The paper container 1 manufactured by the manufacturing method according to the present embodiment is configured by combining separate members including the body member 10 and the bottom member 20. The paper container 1 according to the present embodiment has a substantially inverted truncated cone shape.
図2は胴部材10を構成する原紙を展開したものである。この原紙としては、所定の厚さや坪量の板紙が用いられる。なお、原紙の厚さは、用いられる容器の大きさや、充填する内容物等に応じて各種の厚さのものが任意に選択される。一方、原紙の坪量としては、完成容器の態様によるが、180~350g/m2の坪量を備えていることが好ましい。
FIG. 2 shows a developed base paper constituting the body member 10. As this base paper, a paperboard having a predetermined thickness and basis weight is used. The thickness of the base paper is arbitrarily selected depending on the size of the container used, the contents to be filled, and the like. On the other hand, the basis weight of the base paper is preferably provided with a basis weight of 180 to 350 g / m 2 depending on the form of the finished container.
本実施形態では、耐水性を付与するために、原紙の両面にポリエチレンフィルムが積層されている。なお、ポリエチレンフィルムに代えて、溶融樹脂を用いてもよい。ここで、特許請求の範囲に記載の「熱可塑性樹脂」は、ポリエチレンフィルムや溶融樹脂を含む概念である。
In this embodiment, polyethylene films are laminated on both sides of the base paper in order to impart water resistance. Note that a molten resin may be used instead of the polyethylene film. Here, the “thermoplastic resin” described in the claims is a concept including a polyethylene film and a molten resin.
本実施形態において、図2に示す形状の原紙からなる胴部材10を円形に巻き、両端を互いに重合わせることで逆円錐台状に組立てている。このとき、本実施形態にかかる紙製容器1の口径としては、135mm~150mmが好ましい。また、逆円錐台状の胴部材10と垂線とがなす角度(以下、「テーパー角度」という。)としては、8°~12°程度が好ましい。テーパー角度が8°未満だと、お椀型や丼型に見えない。一方、テーパー角度が12°より大きいと後述する底部材の外周縁と接合しづらい。
In this embodiment, the body member 10 made of the base paper having the shape shown in FIG. At this time, the diameter of the paper container 1 according to this embodiment is preferably 135 mm to 150 mm. Further, the angle formed by the inverted truncated cone body member 10 and the perpendicular (hereinafter referred to as “taper angle”) is preferably about 8 ° to 12 °. If the taper angle is less than 8 °, it does not look like a bowl or bowl. On the other hand, when the taper angle is larger than 12 °, it is difficult to join the outer peripheral edge of the bottom member described later.
次に紙製容器1の底部を組立てるための底部材20について説明する。ここで底部とは、所定の形状に底部材20を成形したものをいう。本実施形態においては、図2に示すように、深皿状に成形したものをいう。底部材20は胴部材10と同様に原紙から作られている。底部材20の外周部には罫線30が施されていることが好ましい。本実施形態では、底部材20が円形であり、円周方向に沿って放射状に延びる罫線30が施されている。本実施形態では、長さの異なる複数の罫線30が構成されている。原紙に罫線処理を施すことで、底部成形時における皺の発生を抑制することができる。罫線30は放射状に100~200本程度配設することが好ましい。罫線30の本数が少なすぎると、成形時に多数の皺が派生し、外観の審美性が低下する恐れがある。一方、罫線30の本数が多すぎると、原紙の物理的強度を低下させる恐れがある。
Next, the bottom member 20 for assembling the bottom of the paper container 1 will be described. Here, the bottom portion refers to the bottom member 20 formed into a predetermined shape. In the present embodiment, as shown in FIG. The bottom member 20 is made of a base paper like the trunk member 10. It is preferable that a ruled line 30 is provided on the outer peripheral portion of the bottom member 20. In the present embodiment, the bottom member 20 is circular, and ruled lines 30 that extend radially along the circumferential direction are provided. In the present embodiment, a plurality of ruled lines 30 having different lengths are configured. By applying a ruled line process to the base paper, wrinkles can be prevented from occurring during the bottom molding. About 100 to 200 ruled lines 30 are preferably arranged radially. If the number of the ruled lines 30 is too small, a large number of wrinkles may be derived at the time of molding, which may reduce the appearance aesthetics. On the other hand, if the number of ruled lines 30 is too large, the physical strength of the base paper may be reduced.
本実施形態では、長さの異なる3種類の罫線30が成形施された底部材20の外周縁21を絞り成形で屈曲させ、深皿状にする。このとき、底部材20の底面から外周縁21までの距離(すなわち、深皿の深さ)としては、20mm~36mmであることが好ましい。20mm未満だと、後述する底部材加工工程において、底部材20の底面部を十分に下方に突出させることができない。一方、36mmを超えると、成形が困難となる。
In the present embodiment, the outer peripheral edge 21 of the bottom member 20 on which three types of ruled lines 30 having different lengths are formed is bent by drawing to form a deep dish shape. At this time, the distance from the bottom surface of the bottom member 20 to the outer peripheral edge 21 (that is, the depth of the deep dish) is preferably 20 mm to 36 mm. If it is less than 20 mm, the bottom surface portion of the bottom member 20 cannot be sufficiently protruded downward in the bottom member processing step described later. On the other hand, if it exceeds 36 mm, molding becomes difficult.
次に、逆円錐台形状に成形された胴部材10の下端部11を内側に折り曲げ、深皿状に成形された底部材20の外周縁21を挟み込んだ後、ヒーターなどで加熱して胴部材10と底部材20とを加熱圧着して接合部40を成形する(図3参照)。これにより、容器内から水や湯が漏れるのを防ぐことができる。
Next, the lower end portion 11 of the barrel member 10 formed in an inverted frustoconical shape is bent inward, the outer peripheral edge 21 of the bottom member 20 formed in a deep dish shape is sandwiched, and then heated by a heater or the like to be a barrel member. 10 and the bottom member 20 are thermocompression bonded to form the joint 40 (see FIG. 3). Thereby, it can prevent that water and hot water leak from the inside of a container.
なお、胴部材と底部材との他の組み合わせ方法としては、次のような方法もある。例えば、胴部材の下端部を内側に、底部材の外周縁を外側に折り曲げる。そして、両者の折り曲げた個所を嵌合させる。その後、嵌合部位を加熱して加熱圧着する。このような方法でも容器を成形することができるが、嵌合部位同士を一度に熱溶着しようとすると、厚みがあるため接着不良を起こしてしまう恐れがあるため、注意が必要である。これに対して、本願発明の方法であれば、一度に加熱圧着させるわけではないため、接着不良が発生しにくい。また、胴部材のテーパー角度がある程度あったとしても、確実に胴部材と底部材が加熱圧着できる。
In addition, as another combination method of the trunk member and the bottom member, there is the following method. For example, the lower end portion of the body member is bent inward, and the outer peripheral edge of the bottom member is bent outward. And the bent part of both is fitted. Then, the fitting part is heated and thermocompression bonded. Although the container can be molded by such a method as well, care should be taken because there is a risk of causing poor adhesion due to the thickness of the fitting parts if they are to be thermally welded together. On the other hand, if it is the method of this invention, since it does not heat-press at a time, it is hard to generate | occur | produce adhesion failure. Moreover, even if there is a certain taper angle of the body member, the body member and the bottom member can be reliably heat-pressed.
次に、胴部材10の上端にカール部50を成形する。カール部50の成形方法としては、従来から広く行われている成形方法と同様の方法を用いることができる。また、必要に応じて、カール部を角型にしてもよい。なお、カール部50の成形を行うタイミングとしては、胴部材10を逆円錐台形状に成形した後であれば特に制限されない。
Next, the curled portion 50 is formed on the upper end of the body member 10. As a method for forming the curled portion 50, a method similar to a conventionally widely used forming method can be used. Moreover, you may make a curled part square shape as needed. The timing for forming the curled portion 50 is not particularly limited as long as it is after the body member 10 is formed into an inverted truncated cone shape.
続いて、底部材20の底部形状を加工する。底部の加工方法としては、所望形状のコアで底部が胴部の下端により成形される下端面を超えて突出するように、容器内側から底部材20をプレス成形すればよい(図4参照)。これにより、容器の内側に突出していた底部が反転され、お椀型や丼型の形状にすることができる。なお、容器全体の高さとしては、口径135~150mmに対して70mm~80mm程度であることが好ましい。
Subsequently, the bottom shape of the bottom member 20 is processed. As a processing method of the bottom portion, the bottom member 20 may be press-molded from the inside of the container so that the bottom portion protrudes beyond the lower end surface formed by the lower end of the trunk portion with a core having a desired shape (see FIG. 4). Thereby, the bottom part which protruded inside the container is reversed, and it can be made into a bowl shape or a bowl shape. The overall height of the container is preferably about 70 mm to 80 mm with respect to the diameter of 135 to 150 mm.
接合部40の上端から底部材20の底面部までの距離は、15mm~22mmとすることが好ましい。または、容器全体の高さにおける接合部40の上端から底部材20の底面部までの距離の比率が、20~30%であることが好ましい。一方、接合部40の下端から底部材20の底面部までの距離は、7mm~14mmとすることが好ましい。または、容器全体の高さにおける接合部40の下端から底部材20の底面部までの距離の比率が、10~20%であることが好ましい。かかる数値範囲とすることで、口径が135~150mmの容器をお椀型や丼型の形状に近づけることができる。本実施形態においては、底部材20の底面から外周縁21までの距離が20mm~36mmとしているため、突出距離を上記範囲にすることができる。なお、コアで容器内側から底部材20を押す回数は制限されない。
The distance from the upper end of the joint 40 to the bottom surface of the bottom member 20 is preferably 15 mm to 22 mm. Alternatively, the ratio of the distance from the upper end of the joint 40 to the bottom surface of the bottom member 20 at the height of the entire container is preferably 20-30%. On the other hand, the distance from the lower end of the joint 40 to the bottom surface of the bottom member 20 is preferably 7 mm to 14 mm. Alternatively, the ratio of the distance from the lower end of the joint 40 to the bottom surface of the bottom member 20 at the height of the entire container is preferably 10 to 20%. By setting the numerical value within this range, a container having a diameter of 135 to 150 mm can be approximated to a bowl shape or a bowl shape. In the present embodiment, since the distance from the bottom surface of the bottom member 20 to the outer peripheral edge 21 is 20 mm to 36 mm, the protruding distance can be in the above range. In addition, the frequency | count of pushing the bottom member 20 from the container inner side with a core is not restrict | limited.
本実施形態においては、底部材20を押す時に、金型を用いて接合部40に押圧成形を行ってもよい。接合部40に押圧成形を行うことで、接合部40に傾斜を持たせることができる。これにより、胴部材10の外観形状に丸みを付与し、お椀型や丼型により近づけることができる。なお、底部材20の成形と接合部40の押圧成形は一つの金型で同時に行ってもよい。
In this embodiment, when the bottom member 20 is pressed, the joint 40 may be press-molded using a mold. By performing press molding on the joint 40, the joint 40 can be inclined. Thereby, roundness can be given to the external appearance shape of the trunk | drum member 10, and it can be brought closer to a bowl shape or a bowl shape. In addition, you may perform the shaping | molding of the bottom member 20 and the press molding of the junction part 40 simultaneously with one metal mold | die.
以上説明したように、本願発明の製造方法によれば、お椀型や丼型のような曲面を備えた形状を紙製容器で再現することができる。また、何層にも重なり合った箇所を一度に加熱圧着しないため、接着不良を起こしにくい。さらに、紙製容器で再現できる形状を多様化させることができる。
As described above, according to the manufacturing method of the present invention, a shape having a curved surface such as a bowl or bowl can be reproduced with a paper container. Further, since the overlapping portions of the layers are not heat-pressed at a time, poor adhesion is unlikely to occur. Furthermore, it is possible to diversify shapes that can be reproduced with a paper container.
1 紙製容器
10 胴部材
11 胴部材の下端部
20 底部材
21 底部材の外周縁
40 接合部 DESCRIPTION OFSYMBOLS 1 Paper container 10 Body member 11 The lower end part of a body member 20 Bottom member 21 The outer periphery of a bottom member 40 Joining part
10 胴部材
11 胴部材の下端部
20 底部材
21 底部材の外周縁
40 接合部 DESCRIPTION OF
Claims (2)
- 紙を主材料とし、少なくとも容器の内面側に熱可塑性樹脂を備える胴部材と底部材とからなる紙製容器の製造方法であって、
胴部材の上端部と下端部が解放された逆円錐台状または筒状に胴部材を成形する胴部材成形工程と、
底部材の外周縁を深皿状になるように屈曲させ、該底部材の外周縁を挟み込むように胴部材の下端部を内側に折り込み、加熱圧着して接合部を成形する接合部成形工程と、
底部材の底面部が接合部を超えて下方に突出するように凹ませる底部材加工工程と、
からなる、紙製容器の製造方法。 Paper is a main material, and is a method for producing a paper container comprising a barrel member and a bottom member provided with a thermoplastic resin at least on the inner surface side of the container,
A barrel member molding step of molding the barrel member into an inverted truncated cone shape or a cylindrical shape in which the upper end portion and the lower end portion of the barrel member are released;
A joint forming step of bending the outer peripheral edge of the bottom member into a deep dish shape, folding the lower end portion of the body member inward so as to sandwich the outer peripheral edge of the bottom member, and forming the joint portion by thermocompression bonding; ,
A bottom member processing step in which the bottom surface portion of the bottom member is recessed so as to protrude downward beyond the joint portion;
A method for producing a paper container. - 前記底部材加工工程において、前記接合部の下端から前記底部材の底面部までの距離が7mm~14mmとなるようにした、請求項1記載の紙製容器の製造方法。 The method for manufacturing a paper container according to claim 1, wherein in the bottom member processing step, a distance from a lower end of the joint portion to a bottom surface portion of the bottom member is 7 mm to 14 mm.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2018-061462 | 2018-03-28 | ||
JP2018061462A JP7042131B2 (en) | 2018-03-28 | 2018-03-28 | How to make a paper container |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2019188870A1 true WO2019188870A1 (en) | 2019-10-03 |
Family
ID=68061740
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2019/012306 WO2019188870A1 (en) | 2018-03-28 | 2019-03-25 | Method for manufacturing paper container |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP7042131B2 (en) |
WO (1) | WO2019188870A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002292762A (en) * | 2001-04-02 | 2002-10-09 | Dainippon Printing Co Ltd | Method for manufacturing paper cup for microwave oven |
JP2009202951A (en) * | 2009-06-16 | 2009-09-10 | Nissin Foods Holdings Co Ltd | Paper container for microwave oven |
JP3169260U (en) * | 2011-05-12 | 2011-07-21 | 天満紙器株式会社 | Top open container |
JP2013193220A (en) * | 2012-03-15 | 2013-09-30 | Tokan Kogyo Co Ltd | Container pressing device and pressing method therefor |
JP2014148319A (en) * | 2013-01-31 | 2014-08-21 | Nippon Dekishii:Kk | Paper container for microwave oven |
JP2014169092A (en) * | 2013-03-01 | 2014-09-18 | Dainippon Printing Co Ltd | Paper cup for microwave oven |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ITVE20070019A1 (en) * | 2007-03-29 | 2008-09-30 | Giorgio Trani | METHOD FOR REALIZING THREE-DIMENSIONAL CONTAINERS IN EXTENDIBLE PAPER MATERIAL.- |
-
2018
- 2018-03-28 JP JP2018061462A patent/JP7042131B2/en active Active
-
2019
- 2019-03-25 WO PCT/JP2019/012306 patent/WO2019188870A1/en active Application Filing
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002292762A (en) * | 2001-04-02 | 2002-10-09 | Dainippon Printing Co Ltd | Method for manufacturing paper cup for microwave oven |
JP2009202951A (en) * | 2009-06-16 | 2009-09-10 | Nissin Foods Holdings Co Ltd | Paper container for microwave oven |
JP3169260U (en) * | 2011-05-12 | 2011-07-21 | 天満紙器株式会社 | Top open container |
JP2013193220A (en) * | 2012-03-15 | 2013-09-30 | Tokan Kogyo Co Ltd | Container pressing device and pressing method therefor |
JP2014148319A (en) * | 2013-01-31 | 2014-08-21 | Nippon Dekishii:Kk | Paper container for microwave oven |
JP2014169092A (en) * | 2013-03-01 | 2014-09-18 | Dainippon Printing Co Ltd | Paper cup for microwave oven |
Also Published As
Publication number | Publication date |
---|---|
JP2019171649A (en) | 2019-10-10 |
JP7042131B2 (en) | 2022-03-25 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2013082484A (en) | Tube container | |
JP2004090929A (en) | Heat-insulating paper-made container | |
JP6596835B2 (en) | Paper cup molding method | |
WO2019188870A1 (en) | Method for manufacturing paper container | |
JP2001293802A (en) | Heat insulating cup made of paper and method for manufacturing the same | |
JP6194661B2 (en) | Paper cup flange mold | |
JP5217605B2 (en) | Paper insulation cup | |
CN201324093Y (en) | Foaming cup body structure | |
JP5889024B2 (en) | Container and container manufacturing method | |
US20210253308A1 (en) | Lid Made of Paper and Method for its Manufacture | |
JP6315728B2 (en) | Container and container manufacturing method | |
JP3847306B2 (en) | Paper container manufacturing method | |
KR20160000996A (en) | A manufacturing method of paper vessel and paper vessel | |
KR101692222B1 (en) | Manufacturing method of paper container | |
JP2011162206A (en) | Resin container and method for manufacturing the same | |
JP2009286402A (en) | Heat insulating cup | |
JP2011084284A (en) | Container and method for manufacturing container | |
KR101227778B1 (en) | Collapsible container for instant noodle(ramen) | |
JP3885423B2 (en) | Paper heat insulation cup and its manufacturing method | |
KR101692223B1 (en) | Manufacturing method of paper container | |
JP2016087983A (en) | Top curl molding metal mold | |
JP2007137447A (en) | Heat insulating composite container | |
JP2009166863A (en) | Container for sealing beverage, food or the like | |
JP4697170B2 (en) | Paper insulation cup | |
JP3175665U (en) | Paper container |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 19775446 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 19775446 Country of ref document: EP Kind code of ref document: A1 |