JP4704668B2 - Method for producing synthetic resin container and synthetic resin container - Google Patents

Method for producing synthetic resin container and synthetic resin container Download PDF

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Publication number
JP4704668B2
JP4704668B2 JP2003103250A JP2003103250A JP4704668B2 JP 4704668 B2 JP4704668 B2 JP 4704668B2 JP 2003103250 A JP2003103250 A JP 2003103250A JP 2003103250 A JP2003103250 A JP 2003103250A JP 4704668 B2 JP4704668 B2 JP 4704668B2
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Prior art keywords
container
synthetic resin
edge
cutting
resin container
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JP2004306193A (en
Inventor
宣典 藤井
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FP Corp
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FP Corp
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Priority to JP2003103250A priority Critical patent/JP4704668B2/en
Application filed by FP Corp filed Critical FP Corp
Priority to CNB038180456A priority patent/CN100453414C/en
Priority to KR1020057001869A priority patent/KR20050080192A/en
Priority to DE60333384T priority patent/DE60333384D1/en
Priority to TW092121130A priority patent/TW200402386A/en
Priority to PCT/JP2003/009780 priority patent/WO2004013003A1/en
Priority to US10/523,005 priority patent/US20060011638A1/en
Priority to EP03766685A priority patent/EP1555211B1/en
Publication of JP2004306193A publication Critical patent/JP2004306193A/en
Priority to US12/382,991 priority patent/US20090188932A1/en
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  • Containers Having Bodies Formed In One Piece (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)

Description

【０００１】
【発明の属する技術分野】
この発明は、周側枠の上部口縁が端縁となっている合成樹脂製容器の製造方法および合成樹脂製容器に関する。
【０００２】
【従来の技術及び発明が解決しようとする課題】
従来の合成樹脂製容器のうち、例えば、シート成形により形成され、内部に収容部が形成される容器は、近年省スペース化等の要請が強くなっており、発泡シート成形品から薄手のシート成形品へと需要が変化してきている。薄手のシート成形品は、シート成形された後、刃物で裁断されて製品として形成されるもので、一般的な容器形態として、収容部を形成する周側枠がやや外側に傾斜した壁部として形成され、壁部の上部に水平部分が形成されていると共に、水平部の外側が端縁となっているものである。
【０００３】
また、この容器に被蓋する蓋についても、シート成形により製造されていると共に、見栄えを良くするために複雑な形状のものが要求されており、上記の容器にフィットさせるため容器と同様に周囲に水平部を有する形態のものとなっている。
そして、上記シート成形品からなる容器や蓋の端縁は、端面が長手方向に直線状となっており、外周全体に亘って鋭利な縁（耳）として表れているものである。
【０００４】
しかしながら、これらの容器や蓋では、端縁が直線状であるため、薄くかつ直線状で鋭い縁（耳）となっているおり、人の手や指等がこの端縁の長手方向に沿って擦れたりした場合には、鋭い縁によって人の手や指等にケガを負う問題点があった。特に、シート成形によって形成された蓋は、厚みが薄くなっており、開閉等の際に触れる機会も多いので、より危険度の高いものであった。
また、この合成樹脂製容器に物品を収容して展示するため包装フィルムを用いてラッピングする際、上記端面によって包装フィルムが切れ、包装をやり直しするケースも発生しており、包装に手間がかかるという欠点もあった。
【０００５】
そして、上記容器の製造方法として、シート成形による場合には、シート成形後にパンチングやトムソン刃を使用した抜き型によって裁断が行われて製品が完成するのであるが、パンチングによる裁断方法では、刃先を特殊な形状に加工することが難しいので、複雑な形態の容器や蓋を形成することができないという問題点があった。また、トムソン刃を使用する場合でもより複雑な形状の容器や蓋を製造することができないという欠点があった。
【０００６】
そこで、この発明は、シート成形によって成形された容器や蓋において、これらの端縁によってケガをしたり、包装フィルムが切断したりすることの無い合成樹脂製容器の製造方法および合成樹脂製容器を提供することを目的としている。
【０００７】
【課題を解決するための手段及び発明の効果】
上記目的を達するため、この発明の合成樹脂製容器の製造方法は、容器本体又は蓋の周側枠の口縁の突出部が端縁となっている合成樹脂製容器の製造方法において、少なくとも上記口縁の突出部を成形する部分をフランジ状端部の全体を載置する範囲が上下方向に波形に形成された金型を用いてシート成形し、しかる後、シート成形品を抜き型に移行させ、切断刃の刃先が、直線状になった切断刃を用いて前記波形形成部を切断することにより個々の容器又は蓋に分離して製造された容器又は蓋の口縁の突出部を、端縁側から見て上下方向に波形状に形成することを特徴としている。
【０００８】
上記容器の製造方法では、口縁の突出部を成形する部分を上下方向に波形に形成した金型を用いてシート成形を行うので、製造された容器は、周側枠の口縁突出部全体が、上下方向に対して波形形状となっている。抜き型において、この口縁突出部を直線状切断刃で切断すると、切断された口縁突出部の端縁は上下方向に対して波形形状となっている。したがって、シート成形等にて形成された端縁が薄い状態の容器であるにも拘わらず、手や指等が端縁に接触しつつ長手方向に沿って移動した場合でも、手や指等の一個所に連続して直線状の端縁が当接することがなくなるので、手や指等がケガをする虞を解消できる容器を製造することができる。また、この容器を使用する際、容器全体を包装フィルム等にて覆った場合にも容器や蓋の端縁が包装フィルムに対して曲線状に当接することとなり、従来に比較してフィルムが切断される虞が格段に改善できる。
【０００９】
切断刃の形状としては、直線状のものを用いると、突出部の端縁を上下方向に波形にすることができる。
さらに、従来、射出成形では製造できない容器であっても、当該金型を用いてシート成形した後、トムソン刃等の切断刃を用いて裁断によって容器を製造することができるので、種々の形態の容器を提供することができる。
【００１０】
また、この発明の請求項２記載の容器の製造方法では、請求項１記載の製造方法において、切断刃による切断時に、容器成形品の温度を１５℃〜５５℃の範囲内に設定して行うことを特徴としている。
容器成形品の温度が１５℃以下の場合、割れが発生し、５５℃以上の温度にて行うと、変形が生ずるので、１５℃〜５５℃の範囲にて行うことが望ましい。
請求項３記載の発明は、請求項１もしくは２に記載の製造方法によって製造した容器又は蓋の口縁の突出部を成形する部分をフランジ状端部の全体を波形状に形成し、かつその端縁側から見て上下方向に波形状に形成したこと特徴とする合成樹脂製容器である。
【００１１】
【発明の実施の形態】
次いで、この発明の実施の形態を説明する。
図１は、実施の形態を示す合成樹脂製容器の斜視図、図２は、図１のＡ部分の部分拡大図である。
合成樹脂製容器１として、この実施の形態では容器本体について説明するものであり、例えば周側枠１０が方形で、底板２０を設けた一般的な形状のものを示している。
【００１２】
周側枠１０は、容器内外方向への強度を保持するため、上部に口縁の突出部となるフランジ状端部１１を有するものである。フランジ状端部１１は、水平部１１ａと、水平部１１ａの先端が突出部１１ｂとなっている。上記突出部１１ｂは蓋側に形成された周縁垂下部（図示せず）と嵌合する形状として外側へ突出した形態に構成されている。
そして、この突出部１１ｃの端縁は、端縁側から見て上下方向および前後方向の双方向に波形となったジグザグ状に構成しており、上下・前後方向への波形形状としては、いずれも凹部の深さ、若しくは凸部の突出長、すなわち上下・前後方向への凹凸量を０．５ｍｍ以下で、凸部間ピッチを１ｍｍ程度に形成して、比較的細かな凹凸形状として構成しているものである。
【００１３】
上記凹凸量としては、０．２〜１ｍｍの範囲に設定することができ、好ましくは０．５ｍｍ以下で、かつ凸部間ピッチを０．５〜５ｍｍの範囲に設定することができ、好ましくは１ｍｍに形成している。上記の設定値以下の場合には凸部間が非常に接近して直線状に近くなり、また、上記設定値以上の場合には、直線状に近い状態となり、いずれにおいても効果が減退する。
この合成樹脂製容器１の製造方法は、合成樹脂材料にて形成された原反シートが、成型用の金型Ｐ1上に供給され多数の容器が碁盤の目状に成形される。そしてシート成形後抜き型へ移行され、トムソン刃Ｃを具備する裁断機にて、個々の容器に分離することにより合成樹脂製容器１が製造される。
【００１４】
上記上記成形用の金型Ｐ1は、図３に示すように、少なくともフランジ状端部１１の突出部１１ｂを成形する部分を上下方向に波形Ｗ（ジグザク、凹凸形状等を含む形状）に形成しており、この金型Ｐ1を用いて成形することにより、突出部１１ｂを上下方向の波形に形成することができる。図３では、上記金型Ｐ1は、フランジ状端部１１の全体を載置する範囲を波形Ｗ形状とした例を示している。
【００１５】
そして、図４には、シート成形後の抜き型Ｐ2による裁断例を示しており、この例の裁断方法ではトムソン刃Ｃを用いた例を示しており、トムソン刃Ｃの刃先を前後方向（厚み方向）に波形（ジグザク、凹凸形状等を含む形状）に形成したものである。このようなトムソン刃Ｃを使用することにより、容器の突出部１１ｂを、上下方向に加えて前後方向にも波形状に形成することができる。
このように、この実施の態様の製造方法を採用することにより、合成樹脂製容器１の周側枠１０の突出部１１ｂの端縁を、端縁側から見て少なくとも厚み方向（上下）に波形形状とすることができ、当該容器の取扱い時に突出部１１ｂに手や指等が擦れたとしても、端縁が凹凸形状となっていることによって端縁が直線状でなくなり、手や指等に傷を付ける虞を解消し、また包装フィルム等が端縁によって切断されてしまうことも無くなる。特に、上記実施の形態では、突出部１１ｂの端縁を厚み方向（上下）と幅方向（前後）とに波形としているので、上記の効果はより一層顕著なものとなし得るのである。したがって、肉厚が薄くなるシート成形によって製造された包装用容器１であっても、安全な容器として提供することができる。
【００１６】
なお、トムソン刃Ｃの刃先が直線状のものを用いたり、パンチングによる裁断方法を採用したりする場合には、刃先が直線であるので、完成した合成樹脂製容器１の突出部１１ｂの端縁は上下方向に波形となっており、この場合でも、従来品に比較して、端縁を波形に形成しているので安全な容器を提供することができるものである。
上記切断刃による切断時においては、成形品の温度を１５℃〜５５℃の範囲内に設定することが望ましい。成形品の温度が１５℃以下の場合、割れが発生して容器が不良品となる。逆に５５℃以上の高温度にて裁断を行うと、成形品が柔らかくて変形が生ずるので、１５℃〜５５℃の範囲にて行うことが望ましい。
【００１７】
なお、上記した実施の形態では、容器本体の周縁に実施した例にて説明したが、蓋の周縁に対して同様に実施することもできるものであり、蓋の端縁によって、ケガをしたり、包装フィルムが切れたりする虞を解消できるものである。特に、蓋は、蓋の開閉時に、頻繁に操作がなされるものであるから端縁を波形にすることによって、蓋においてもより安全な製品を提供することができるものである。
【図面の簡単な説明】
【図１】この発明の実施の形態を示す包装用容器の斜視図である。
【図２】上記包装用容器のＡ部の拡大図である。
【図３】シート成形用の金型の一例を示す斜視図である。
【図４】トムソン刃による裁断状態を示す正面図である。
【符号の説明】
１ 包装用容器
１０ 周側枠
１１ｂ 突出部
Ｐ1 金型
Ｃ トムソン刃[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a synthetic resin container manufacturing method and a synthetic resin container in which an upper edge of a peripheral frame is an edge.
[0002]
[Prior art and problems to be solved by the invention]
Among conventional synthetic resin containers, for example, a container formed by sheet molding and having a housing portion formed therein has recently been increasingly demanded for space saving and the like. The demand for goods is changing. A thin sheet molded product is formed as a product by cutting with a blade after being molded into a sheet, and as a general container form, the peripheral side frame forming the housing part is slightly inclined outward The horizontal portion is formed at the upper portion of the wall portion, and the outer side of the horizontal portion is an edge.
[0003]
In addition, the lid that covers the container is manufactured by sheet molding and is required to have a complicated shape in order to improve the appearance. It has the form which has a horizontal part.
And the edge of the container and lid | cover which consists of said sheet | seat molded product has a linear shape in the longitudinal direction, and appears as a sharp edge (ear) over the whole outer periphery.
[0004]
However, in these containers and lids, the edges are straight, so they are thin, straight, and have sharp edges (ears), and human hands, fingers, etc. are along the longitudinal direction of the edges. In the case of rubbing, there has been a problem of injuring human hands and fingers by sharp edges. In particular, the lid formed by sheet molding is thinner and has a higher risk because it has many opportunities to be touched during opening and closing.
In addition, when wrapping with a packaging film in order to house and display articles in this synthetic resin container, there are cases where the packaging film is cut by the end face and the packaging is reworked, which takes time and effort for packaging. There were also drawbacks.
[0005]
And as a manufacturing method of the container, in the case of sheet molding, the product is completed by cutting with a punching or punching die using a Thomson blade after the sheet molding, but in the cutting method by punching, the cutting edge is Since it is difficult to process into a special shape, there is a problem in that a container or a lid having a complicated shape cannot be formed. In addition, even when using a Thomson blade, there is a drawback in that a more complicated container or lid cannot be manufactured.
[0006]
Therefore, the present invention provides a method for producing a synthetic resin container and a synthetic resin container that are not injured or cut by a packaging film in a container or lid formed by sheet molding. It is intended to provide.
[0007]
[Means for Solving the Problems and Effects of the Invention]
In order to achieve the above object, the method for producing a synthetic resin container according to the present invention is a method for producing a synthetic resin container in which the protruding portion of the lip of the peripheral frame of the container main body or the lid is an edge. The part that forms the protruding part of the lip is formed into a sheet using a mold in which the entire range of the flange-shaped end is placed in a wave shape in the vertical direction, and then the sheet molded product is transferred to the die The cutting edge of the container or lid produced by separating the corrugated part by cutting the corrugated part using a linear cutting blade, It is characterized by being formed into a wave shape in the vertical direction as viewed from the edge side.
[0008]
In the above-described container manufacturing method, sheet forming is performed using a mold in which a portion for forming the protruding portion of the lip is formed in a corrugated shape in the vertical direction, and thus the manufactured container is the entire lip protruding portion of the peripheral side frame. but it has a waveform shape with respect to up and down direction. In the punching die, when this lip protrusion is cut with a linear cutting blade, the edge of the cut lip protrusion has a wave shape with respect to the vertical direction. Therefore, even when the edge formed by sheet molding or the like is a thin container, even if the hand or finger moves along the longitudinal direction while contacting the edge, Since the straight edge does not contact continuously at one place, a container that can eliminate the risk of injury to hands, fingers, etc. can be manufactured. In addition, when using this container, even if the entire container is covered with a packaging film, etc., the edges of the container and lid will come into contact with the packaging film in a curved shape, and the film will be cut compared to the conventional case. The risk of being drastically improved.
[0009]
If a linear cutting blade is used, the edge of the protrusion can be corrugated in the vertical direction .
Furthermore, even in the case of a container that cannot be manufactured conventionally by injection molding, after forming a sheet using the mold, the container can be manufactured by cutting using a cutting blade such as a Thomson blade. A container can be provided.
[0010]
Moreover, in the manufacturing method of the container of Claim 2 of this invention, in the manufacturing method of Claim 1, it sets by setting the temperature of a container molded product in the range of 15 degreeC-55 degreeC at the time of the cutting | disconnection by a cutting blade. It is characterized by that.
When the temperature of the container molded product is 15 ° C. or lower, cracking occurs, and deformation occurs when performed at a temperature of 55 ° C. or higher.
A third aspect of the present invention is that the flange-shaped end part of the container or lid produced by the manufacturing method according to the first or second aspect of the present invention is formed into a wave-like shape, and the part thereof is formed into a wave shape. It is a synthetic resin container characterized by being formed into a wave shape in the vertical direction when viewed from the edge side.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Next, an embodiment of the present invention will be described.
FIG. 1 is a perspective view of a synthetic resin container showing an embodiment, and FIG. 2 is a partially enlarged view of a portion A in FIG.
In this embodiment, the synthetic resin container 1 will be described with respect to a container body. For example, the peripheral frame 10 is rectangular and a general shape provided with a bottom plate 20 is shown.
[0012]
The peripheral side frame 10 has a flange-like end portion 11 serving as a protruding portion of the lip at the upper portion in order to maintain strength in the container inside / outside direction. The flange-shaped end portion 11 has a horizontal portion 11a and a tip of the horizontal portion 11a as a protruding portion 11b. The protrusion 11b is configured to protrude outward as a shape that fits with a peripheral hanging part (not shown) formed on the lid side.
And the edge of this protrusion part 11c is comprised in the zigzag shape which became a waveform in both the up-down direction and the front-back direction seeing from the end edge side, As the waveform shape to an up-down direction and the front-back direction, The depth of the concave portion or the protruding length of the convex portion, that is, the concave / convex amount in the vertical and front / rear directions is 0.5 mm or less, and the pitch between the convex portions is formed to be about 1 mm to constitute a relatively fine concave / convex shape. It is what.
[0013]
The amount of unevenness can be set in the range of 0.2 to 1 mm, preferably 0.5 mm or less, and the pitch between the protrusions can be set in the range of 0.5 to 5 mm, preferably It is formed to 1 mm. When the value is not more than the above set value, the convex portions are very close to each other and become linear, and when the value is more than the above set value, the state is almost linear, and the effect is reduced in any case.
Method for manufacturing the synthetic resin container 1, original sheet which is formed of synthetic resin material, a large number of containers are fed onto the mold P 1 for molding is molded into a grid pattern. Then, the sheet is transferred to a punching die after sheet forming, and the synthetic resin container 1 is manufactured by separating into individual containers with a cutting machine having a Thomson blade C.
[0014]
As shown in FIG. 3, the molding die P 1 is formed with at least a portion for molding the protruding portion 11b of the flange-shaped end portion 11 in a waveform W (a shape including a zigzag shape and an uneven shape). In addition, by forming using this mold P 1 , the protruding portion 11b can be formed into a waveform in the vertical direction. FIG. 3 shows an example in which the mold P 1 has a waveform W shape in a range where the entire flange-shaped end portion 11 is placed.
[0015]
FIG. 4 shows an example of cutting with the punching die P 2 after sheet forming. In the cutting method of this example, an example using the Thomson blade C is shown, and the cutting edge of the Thomson blade C is moved in the front-rear direction ( It is formed in a waveform (a shape including a zigzag, uneven shape, etc.) in the thickness direction). By using such a Thomson blade C, the protruding portion 11b of the container can be formed in a wave shape in the front-rear direction in addition to the vertical direction.
As described above, by adopting the manufacturing method of this embodiment, the end edge of the protruding portion 11b of the peripheral side frame 10 of the synthetic resin container 1 is corrugated in at least the thickness direction (up and down) when viewed from the end edge side. Even if a hand or a finger rubs against the protruding portion 11b when handling the container, the edge is not straight because the edge is uneven, and the hand or finger is scratched. In addition, the packaging film or the like is not cut by the edge. In particular, in the above-described embodiment, the edge of the protruding portion 11b is corrugated in the thickness direction (up and down) and the width direction (front and back), so the above effect can be made even more remarkable. Therefore, even if it is the packaging container 1 manufactured by the sheet | seat shaping | molding by which thickness becomes thin, it can be provided as a safe container.
[0016]
Note that when the Thomson blade C has a straight cutting edge or when a cutting method using punching is employed, the cutting edge is a straight line, so the edge of the protruding portion 11b of the finished synthetic resin container 1 is used. Has a waveform in the vertical direction, and even in this case, a safe container can be provided because the edge is formed in a waveform compared to the conventional product.
At the time of cutting with the cutting blade, it is desirable to set the temperature of the molded product within a range of 15 ° C to 55 ° C. When the temperature of the molded product is 15 ° C. or lower, cracking occurs and the container becomes a defective product. Conversely, if cutting is performed at a high temperature of 55 ° C. or higher, the molded product is soft and deforms. Therefore, it is preferable to perform the cutting in the range of 15 ° C. to 55 ° C.
[0017]
In the above-described embodiment, the example has been described on the periphery of the container body. However, the embodiment can be similarly applied to the periphery of the lid, and the edge of the lid may cause injury. It is possible to eliminate the risk of the packaging film being cut. In particular, since the lid is frequently operated when the lid is opened and closed, it is possible to provide a safer product even in the lid by corrugating the edge.
[Brief description of the drawings]
FIG. 1 is a perspective view of a packaging container showing an embodiment of the present invention.
FIG. 2 is an enlarged view of part A of the packaging container.
FIG. 3 is a perspective view showing an example of a sheet molding die.
FIG. 4 is a front view showing a cutting state with a Thomson blade.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Packaging container 10 Peripheral side frame 11b Protrusion part P 1 Mold C Thomson blade

Claims (3)

容器本体又は蓋の周側枠の口縁の突出部が端縁となっている合成樹脂製容器の製造方法において、少なくとも上記口縁の突出部を成形する部分をフランジ状端部の全体を載置する範囲が上下方向に波形に形成された金型を用いてシート成形し、しかる後、シート成形品を抜き型に移行させ、切断刃の刃先が、直線状になった切断刃を用いて前記波形形成部を切断することにより個々の容器又は蓋に分離して製造された容器又は蓋の口縁の突出部を、端縁側から見て上下方向に波形状に形成することを特徴とする合成樹脂製容器の製造方法。In the synthetic resin container manufacturing method in which the protruding portion of the lip of the peripheral frame of the container main body or the lid is an edge, at least the portion where the protruding portion of the lip is molded is mounted on the entire flange-shaped end. The sheet to be placed is formed into a sheet using a mold having a corrugated shape in the vertical direction, and then the sheet molded product is transferred to a punching die, and the cutting edge of the cutting blade is formed using a straight cutting blade. Protruding portions of the mouth of the container or lid manufactured by cutting the corrugated portion into separate containers or lids are formed in a wave shape in the vertical direction when viewed from the edge side. A method for producing a synthetic resin container. 上記切断刃による切断時に、容器成形品の温度を１５℃〜５５℃の範囲内に設定して行うことを特徴とする請求項１記載の合成樹脂製容器の製造方法。  The method for producing a synthetic resin container according to claim 1, wherein the temperature of the container molded product is set within a range of 15 ° C to 55 ° C when cutting with the cutting blade. 請求項１もしくは２に記載の製造方法によって製造した容器又は蓋の口縁の突出部を成形する部分をフランジ状端部の全体を波形状に形成し、かつその端縁側から見て上下方向に波形状に形成したこと特徴とする合成樹脂製容器。The part which forms the protrusion part of the opening of the container or the lid of the container manufactured by the manufacturing method according to claim 1 or 2 is formed in a wave shape on the entire flange-like end part, and when viewed from the end side, in a vertical direction. A synthetic resin container characterized by being formed into a wave shape.
JP2003103250A 2002-08-02 2003-04-07 Method for producing synthetic resin container and synthetic resin container Expired - Fee Related JP4704668B2 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
JP2003103250A JP4704668B2 (en) 2003-04-07 2003-04-07 Method for producing synthetic resin container and synthetic resin container
KR1020057001869A KR20050080192A (en) 2002-08-02 2003-08-01 Packaging container and method of producing the same
DE60333384T DE60333384D1 (en) 2002-08-02 2003-08-01 PACKAGING CONTAINER AND MANUFACTURING METHOD THEREFOR
TW092121130A TW200402386A (en) 2002-08-02 2003-08-01 Packaging container and method of producing the same
CNB038180456A CN100453414C (en) 2002-08-02 2003-08-01 Packaging container and method of producing the same
PCT/JP2003/009780 WO2004013003A1 (en) 2002-08-02 2003-08-01 Packaging container and method of producing the same
US10/523,005 US20060011638A1 (en) 2002-08-02 2003-08-01 Packaging container and method of producing the same
EP03766685A EP1555211B1 (en) 2002-08-02 2003-08-01 Packaging container and method of producing the same
US12/382,991 US20090188932A1 (en) 2002-08-02 2009-03-27 Packaging container and lid therefor

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