JPS60134844A - Method of sealing vessel made of paper for filling liquid - Google Patents
Method of sealing vessel made of paper for filling liquidInfo
- Publication number
- JPS60134844A JPS60134844A JP58234722A JP23472283A JPS60134844A JP S60134844 A JPS60134844 A JP S60134844A JP 58234722 A JP58234722 A JP 58234722A JP 23472283 A JP23472283 A JP 23472283A JP S60134844 A JPS60134844 A JP S60134844A
- Authority
- JP
- Japan
- Prior art keywords
- paper container
- wall portion
- bottom wall
- opposing
- paper
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Making Paper Articles (AREA)
- Closing Of Containers (AREA)
- Cartons (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
イ、産業上の利用分野
本発明は、酒類、果汁類等の液状内容物の収納器体とし
て好適に使用し得る液体充填用紙製容器の密封方法に関
するものである。DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to a method of sealing a liquid-filled paper container that can be suitably used as a storage container for liquid contents such as alcoholic beverages and fruit juices.
口、従来技術
近年、酒類、果汁類等の液状内容物の収納器体として樹
脂コーティング層を有する原紙を折り畳み中空器体に形
成してなる紙製容器が多用されている。BACKGROUND OF THE INVENTION In recent years, paper containers made by folding base paper with a resin coating layer to form a hollow container have come into widespread use as containers for liquid contents such as alcoholic beverages and fruit juices.
第1図は、上記紙製容器を例示する斜視図である。第1
図において、四角柱状の紙製容器(1)の頂壁部(2)
は屋根形、所謂、ゲーブルトップ状に成形されており、
該頂壁部(2)の一方の傾斜面には液状内容物の注出栓
(3)が装着されCいる。FIG. 1 is a perspective view illustrating the paper container. 1st
In the figure, the top wall (2) of a square prism-shaped paper container (1)
is shaped like a roof, a so-called gable top,
A spout (3) for dispensing liquid contents is attached to one inclined surface of the top wall (2).
第2図は、上記紙製容器(1)を形成する略矩形状の原
紙(4)の展開図である。原紙(4)の表裏両面にば熱
可塑性樹脂のコーティング層(図示せず)が形成されて
おり、該樹脂コーティング層は、原紙(4)を紙製容器
(1)に形成する際に加熱により溶融し接着剤として機
能し、紙製容器(1)の完成後に於いては該紙製容器(
1)に対し防水性乃至は耐湿性イ1与部材として機能す
る。FIG. 2 is a developed view of a substantially rectangular base paper (4) forming the paper container (1). A thermoplastic resin coating layer (not shown) is formed on both the front and back sides of the base paper (4), and the resin coating layer is heated when forming the base paper (4) into the paper container (1). It melts and functions as an adhesive, and after the paper container (1) is completed, the paper container (
In contrast to 1), it functions as a waterproof or moisture-resistant member.
第2図において原紙(4)上に表示された一点鎖線は、
紙面に対し手前側に、即ち山折り状に折り曲げる折り曲
げ線を示し、また二点鎖線は紙面の1¥′面側に、即ち
谷折り状に折り曲げる折り曲げ線を示す。以下、紙製容
器(1)の成形過程を第2図、第3図(A)、(B)お
よび第4図に基づいて説明する。The one-dot chain line displayed on the base paper (4) in Figure 2 is
The folding lines are shown for folding toward the front side of the paper, that is, in a mountain fold shape, and the two-dot chain lines indicate folding lines for folding toward the 1\' side of the paper, that is, in a valley fold shape. Hereinafter, the process of forming the paper container (1) will be explained based on FIG. 2, FIG. 3(A), (B), and FIG. 4.
まず原紙(4)を一点鎖線(a)に沿って山折り状に折
り曲げて四角筒状に成形し、該四角筒体の対向する接合
縁(5)、(5′)を重ね合わゼで高周波ウエルダ(図
示せず)等の接合手段を利用して樹脂コーティング層を
溶融状態にし、該f4融樹脂の冷却固化により接合縁(
5)、(5“)を接着させ四角形断面を有する中空筒体
(6)を形成する。First, the base paper (4) is folded into a mountain-fold shape along the dashed line (a) to form a square tube, and the opposing joining edges (5) and (5') of the square tube are overlapped and high-frequency welded. The resin coating layer is melted using a joining means such as (not shown), and the joining edge (
5) and (5") are glued together to form a hollow cylinder (6) having a square cross section.
次に該中空筒体(6)を第2図における一点鎖線(b)
、(C)および二点鎖線(d)、(e)、(f)に沿っ
て折曲げ紙製容器(1)の底壁部(7)を形成する。即
ち、中空筒体(6)の下方開口端側壁(8)、(8)の
中央部を内側に折り曲げて対向Σ字状の端縁形状を有す
る底壁部(7)を予備成形する(第3図(A)参照)。Next, the hollow cylindrical body (6) is connected to the dotted line (b) in FIG.
, (C) and the two-dot chain lines (d), (e), and (f) to form the bottom wall portion (7) of the folded paper container (1). That is, the center portions of the lower open end side walls (8), (8) of the hollow cylindrical body (6) are bent inward to preform the bottom wall portion (7) having opposing Σ-shaped edge shapes. (See Figure 3 (A)).
然る後上記底壁部(7)の対向Σ字状端縁を密着させて
重ね合わせ、この状態で前記公知の接合手段を利用して
樹脂コーティング層を溶融させて上記対向Σ字状に折り
畳まれた端縁を封止し、紙製容器(1)の底壁部(7)
を形成する(第3図(B)参照)。After that, the opposing Σ-shaped edges of the bottom wall portion (7) are brought into close contact and overlapped, and in this state, the resin coating layer is melted using the known joining means and folded into the opposing Σ-shaped shape. The bottom wall (7) of the paper container (1) is sealed.
(See FIG. 3(B)).
次に底壁部(7)を封止された前記紙製容器(1)に注
出栓(3)を取付け、該紙製容器(1)の上方開口端か
ら容器内に酒類、果汁類等の液状内容物を規定量充填し
、この後、以下に記載する折り畳みならびに封止要領に
従って頂壁部(2)を封鎖して最終製品に仕上げる。Next, a pouring stopper (3) is attached to the paper container (1) whose bottom wall portion (7) is sealed, and alcoholic beverages, fruit juices, etc. are poured into the container from the upper open end of the paper container (1). A specified amount of the liquid content is filled, and then the top wall (2) is sealed according to the folding and sealing procedure described below to complete the final product.
頂壁部(2)の成形方法は、前記底壁部(7)の成形方
法と略同しであり、第2図において一点鎖線(g)、(
h )で示す折り曲げ線に沿つ′C山折り状に、また二
点鎖線口)、(J)、(k)で示す折り曲げ線に沿って
谷折り状に原HIE(4)を折り曲げ、紙製容器(1)
の上方開口端の側壁(9)、(9)中央部か内側に折り
曲げられた対向Σ字状の端縁形状を有する頂壁部(2)
を形成しく第4図参照)、該対向Σ字状の端縁を密着さ
せた状態で重ね合わせ、前記樹脂コーティング層を溶融
させて該端縁を封止する。斯くして内部に液状内容物を
収納しζなる紙製容器(1)が得られる。The method of forming the top wall portion (2) is approximately the same as the method of forming the bottom wall portion (7), and in FIG.
Fold the original HIE (4) into a 'C mountain fold shape along the fold line shown in h Container made (1)
Side wall (9) at the upper opening end, (9) Top wall portion (2) having opposing Σ-shaped edges bent inward from the center.
(see FIG. 4), the opposing Σ-shaped edges are overlapped with each other in close contact, and the resin coating layer is melted to seal the edges. In this way, a paper container (1) having a liquid content stored therein and named ζ is obtained.
然しなから公知の紙製容器は実用上十分な密封性能を具
備していない場合があり、殊に該紙製容器の底壁部ある
いは頂壁部においてこの傾向が顕著であった。即ち、在
来の紙製容器において該紙製容器(1)の頂壁部(2)
または底壁部(7)を形成する対向Σ字状に折り曲げら
れた側壁中央の突合わせ縁近傍には、第5図乃至第7図
に示すように隙間(G1)または(G2)が残存するこ
とがあった。この隙間(G1)、(G2)は、紙製容器
(1)内に収容された液状内容物に対し、漏出現象を住
せしめる液流出間隙とし、で機能し、液状内容物に目減
りを生せしめる原因となっていた。このような隙間(G
1)または(G2)に起因する内容物の漏れは、紙製容
器(1)の載置部位、例えばテーブル面等を汚ずだりで
なく、空気中の細菌類や塵埃等の侵入を許容し、充填さ
れた液状内容物に腐敗や汚染を引き起こす原因ともなっ
ていた。However, known paper containers may not have practically sufficient sealing performance, and this tendency is particularly noticeable at the bottom wall or top wall of the paper container. That is, in a conventional paper container, the top wall (2) of the paper container (1)
Alternatively, a gap (G1) or (G2) remains near the abutting edge at the center of the side wall that is bent into an opposing Σ shape forming the bottom wall portion (7), as shown in FIGS. 5 to 7. Something happened. These gaps (G1) and (G2) function as liquid outflow gaps that allow leakage of the liquid contents stored in the paper container (1), and cause the liquid contents to wear out. It was the cause. Such a gap (G
Leakage of contents due to 1) or (G2) does not stain the place where the paper container (1) is placed, such as the table surface, but rather allows the intrusion of airborne bacteria and dust. This also caused spoilage and contamination of the filled liquid contents.
ハ8発明の目的
本発明の目的は、強固な密封構造を有する液体充填用紙
製容器の密封方法を提供することである。C.8 Purpose of the Invention An object of the present invention is to provide a method for sealing a liquid-filled paper container having a strong sealing structure.
ニ9発明の構成
本発明は、表裏両面に樹脂コーティング層(12)を有
J−る略矩形状の原紙(4)を折り曲げ、対向する一組
の接合縁(5)、(5′)同志を重ね合わせて溶着し、
矩形もしくは正方形断面を有する中空筒体(6)を形成
し、該中空筒体(6)の上下開口端において相対する前
記中空筒体(6)の側壁(9)、(9)または(8)、
(8)の中央部を内側に折り曲げて対向Σ字状の端縁形
状を有する頂壁部(2)または底壁部(7)を形成し、
前記対向Σ字状を為す壁面の内部を密着状態に重ね合わ
せ、前記樹脂コーティング層の溶着によって前記重ね合
わせ部位を封止する液体充填用紙製容器(1)の製造上
程において、上記頂壁部(2)または底壁部(7)に前
記対向Σ字状に折り曲げられた側壁中央の突合わせ縁(
10)、(10)または(11)、(11)と直交する
敵状突起(22)、(33)を有する金型を押付け、該
敵状突起(22)、(33)の加圧による溶融樹脂(1
2)の流動を利用して前記突合わせ縁(10)、(10
)または(11)、(11)の近傍に残存している隙間
(Gl’)、(02’)を封止する液体充填用紙製容器
(1)の密封力法を要旨とするものである。D9 Structure of the Invention The present invention involves bending a substantially rectangular base paper (4) having a resin coating layer (12) on both the front and back sides, and forming a pair of opposing joining edges (5) and (5') together. overlap and weld,
Forming a hollow cylinder (6) having a rectangular or square cross section, the side walls (9), (9) or (8) of the hollow cylinder (6) facing each other at the upper and lower open ends of the hollow cylinder (6) ,
(8) by bending the center part inward to form a top wall part (2) or a bottom wall part (7) having opposing Σ-shaped edge shapes;
In the manufacturing process of a liquid-filled paper container (1) in which the insides of the opposing Σ-shaped walls are closely overlapped and the overlapped portion is sealed by welding the resin coating layer, the top wall ( 2) or the butt edge (
10), (10) or (11), a mold having enemy-like projections (22), (33) perpendicular to (11) is pressed, and the enemy-like projections (22), (33) are melted by pressurization. Resin (1
2), the abutting edges (10), (10
) or (11), the gist is a method of sealing force for a liquid-filled paper container (1) that seals the gaps (Gl') and (02') remaining in the vicinity of (11).
ボ、実施例
第8図は本発明方法によって封止された紙製容器(1)
の頂壁部(2)の構造を例示する斜視図であり、第9図
は該紙製容器(1)の底壁部(7)の封止構造を例示す
る斜視図である。Embodiment FIG. 8 shows a paper container (1) sealed by the method of the present invention.
FIG. 9 is a perspective view illustrating the structure of the top wall (2) of the paper container (1), and FIG. 9 is a perspective view illustrating the sealing structure of the bottom wall (7) of the paper container (1).
また第10図は上記頂壁部(2)および底壁部(7)に
形成された封止部位の部分拡大断面図である。第10図
に示す紙製容器(1)の密封構造は、頂壁部(2)ある
いは底壁部(7)の対向Σ字状に折り曲げられた側壁(
9)、(9)または(8)、(8)の中央部に位置して
いる突合わせ縁(10)、(10)または(11)、(
11)の間に、溶融樹脂(12)を流入さ−l、該突合
わせ縁(10)、(10)または(11)、(11)の
近傍に残存している隙間(Gl’)、(G2’)を前記
溶融樹脂(12)で封鎖したものである。Further, FIG. 10 is a partially enlarged sectional view of the sealing portions formed on the top wall portion (2) and the bottom wall portion (7). The sealing structure of the paper container (1) shown in FIG. 10 consists of side walls (
9), (9) or (8), the butting edge (10), (10) or (11) located in the center of (8), (
11), the molten resin (12) is injected into the gaps (Gl') remaining near the butt edges (10), (10) or (11), (11), ( G2') is blocked with the molten resin (12).
第11図は、本発明方法において、紙製容器(1)の底
壁部(7)の形成時に使用されるプレス側ダイおよびマ
ンドレルのfi 視図である。FIG. 11 is a fi view of the press-side die and mandrel used when forming the bottom wall portion (7) of the paper container (1) in the method of the present invention.
第12図(A)、(B)は紙製容器(1)の底壁部(7
)を加圧する敵状突起(22)を有するプレス側ダイ
(D)の側面図および底面図であり、°第13図(A)
、(B)は、紙製容器(1)の底壁部(7)の加圧に際
し該紙製容器内に嵌装され前記プレス側ダイ (D)と
共働するマンドレル(M)、殊にその敵状突起(23)
の配設状態を例示する上面図および側面図である。Figures 12 (A) and (B) show the bottom wall (7) of the paper container (1).
) press-side die having an enemy-like protrusion (22) that pressurizes the
13(D) is a side view and a bottom view of FIG. 13(A).
, (B) is a mandrel (M) that is fitted into the paper container (1) and cooperates with the press-side die (D) when the bottom wall (7) of the paper container (1) is pressurized. The enemy-like projection (23)
FIG. 4 is a top view and a side view illustrating the arrangement state of the FIG.
第12図(A)、(B)において、プレス側ダイ (D
)の端面(20)の略中夫には、該端面(20)よりも
僅かに盛り上がり、前記底壁部(7)の封IN:部の幅
寸法と略等しい加圧面積を有する比較的幅の広い加圧面
(21)が形成されており、該加圧面(21)上には溶
融樹脂押出用の敵状突起(22)が複数本(図では3本
)を1組として、前記突合わせ縁(11)、(11)お
よび接合縁(5)、(5゛)と直交するように所定値T
に1組づつ合計2組突設されている。更に−[−記加圧
面(21)上には、該加圧面(21)の略全長に亘って
延びる第2の敵状突起(22’ )並びに該敵状突起(
22’ )よりもやや短く、太い第3の敵状突起(22
” ’)が突設されている。上記敵状突起(22)、(
22°)、(22”°)は、底壁部(7)の対向Σ字状
に折り曲げられた端縁を重ね合わせ状態で加熱下に圧縮
し、樹脂の流入によって前記突合わせ縁(11)、(1
1)および接合縁(5)、(5゛)を封鎖するための加
圧接着部材として機能する。In Fig. 12 (A) and (B), the press side die (D
) has a comparatively wide width that is slightly raised from the end surface (20) and has a pressing area that is approximately equal to the width of the sealing section of the bottom wall section (7). A wide pressure surface (21) is formed on the pressure surface (21), and on the pressure surface (21), a plurality of enemy-like projections (22) for extruding molten resin are formed as a set (three in the figure) and A predetermined value T is set perpendicularly to the edges (11), (11) and the joining edges (5), (5゛).
A total of two sets are provided, one set each. Further, on the pressure surface (21), there are a second enemy-like projection (22') extending over substantially the entire length of the pressure surface (21) and a second enemy-like projection (22').
The third enemy-like process (22') is slightly shorter and thicker than the third enemy-like process (22').
"') are protrudingly provided. The enemy-like projections (22), (
22°) and (22”°) are obtained by heating and compressing the opposite Σ-shaped bent edges of the bottom wall portion (7) in an overlapping state, and by inflowing the resin, the abutting edges (11) , (1
1) and the joint edges (5), (5゛).
第13図(A>、(B)において、マンドレル(M)の
上面(30)にはその略全幅に亘って延びる凹溝(31
)が形成されている。該凹溝の幅寸法は前記の盛り上が
った加圧面(21)が嵌り込み得るように幅寸法が調整
されており、該凹溝(31)の底面(32)には、溶融
樹脂押出用の第4の敵状突起(33)が複数本(図では
3本)を1組として合計2組、上記プレス側ダイ (D
)の敵状突起(22)と対応するように配設されている
。In FIGS. 13A and 13B, the upper surface (30) of the mandrel (M) has a concave groove (31) extending over almost its entire width.
) is formed. The width dimension of the groove is adjusted so that the raised pressure surface (21) can fit therein, and a groove for extruding molten resin is provided on the bottom surface (32) of the groove (31). A total of 2 sets of the enemy-like protrusions (33) numbered 4 (3 in the figure) are formed on the press side die (D
) is arranged so as to correspond to the enemy-like protrusion (22).
第14図は、上記プレス側ダイ (1))とマンドレル
(M)との保合状態の説明図である。図示する如く、プ
レス側ダイ (t〕)の下面に設けられた第1の敵状突
起(22)とマンドレル(M)の上面に設けられた第4
の敵状突起(33)とは、互いに騒ピッチだけずれた係
合位置を採りiMるように配置されている。ULって底
壁部(7)の封止に際し前記第1の敵状突起(22)と
第4の敵状突起(33)とは、その間に紙11容器(1
)の封止部位を挾み込んだ状態て交互に入れ千秋に眠り
込み、溶融樹脂(12)の流動を促進する。FIG. 14 is an explanatory diagram of the state in which the press-side die (1)) and the mandrel (M) are engaged. As shown in the figure, the first enemy-like projection (22) provided on the lower surface of the press-side die (t) and the fourth enemy-like projection (22) provided on the upper surface of the mandrel (M)
The opposing protrusions (33) are arranged so as to adopt engagement positions that are shifted from each other by a pitch. When sealing the bottom wall portion (7) with UL, the first enemy-like projection (22) and the fourth enemy-like projection (33) have a paper 11 container (1
) are put in alternately with the sealing parts of the resin (12) sandwiched between them to promote the flow of the molten resin (12).
以下、本発明に係る紙製容器(1)の作成要領を説明す
る。Hereinafter, the procedure for making the paper container (1) according to the present invention will be explained.
まず前記第2図乃至第40に示す要領に従つと、表裏両
面に樹脂二1−ティング層を有する略矩形状の原紙(4
)を折り曲げ、対向する接合縁(5)、(5゛)同志を
重ね合わせ、この状態で高周波ウエルダ等の公知の接合
手段を利用し一ζ樹脂コーティング1をを溶融させ、加
圧下に該樹脂を固化せしめることにより、矩形もしくは
正方形の開口端を有する中空筒体(6)を形成Jる。First, according to the procedure shown in FIGS. 2 to 40 above, a substantially rectangular base paper (4
), the opposing joining edges (5) and (5゛) are overlapped, and in this state, the 1ζ resin coating 1 is melted using a known joining means such as a high frequency welder, and the resin coating 1 is melted under pressure. By solidifying, a hollow cylinder (6) having a rectangular or square open end is formed.
上記中空筒体(6)を紙製容器(1)の底壁部(7)を
形成すべき下方開口端を突出せしめた状態で第15図に
示すようにマンドレル(M)ニ嵌め込む。次いでマンド
レル(M)の上面(30)から上方に向かって突出して
いる中空筒体(6)の側壁(8)、(8)の中央部を内
側に折り曲げ、該中空筒体(6)の端縁部を対向2字状
に折り曲げた底壁部(7)を形成する(第16図参照)
。The hollow cylindrical body (6) is fitted into a mandrel (M) as shown in FIG. 15 with its lower open end, which is to form the bottom wall (7) of the paper container (1), protruding. Next, the center portions of the side walls (8), (8) of the hollow cylinder (6) protruding upward from the upper surface (30) of the mandrel (M) are bent inward, and the ends of the hollow cylinder (6) are folded inward. A bottom wall portion (7) is formed by bending the edges into two opposing shapes (see Figure 16).
.
然る後、上記中空筒体(6)を加熱して樹脂コーティン
グ層を溶融状態となし、第17図に示す如くプレス側ダ
イ (D)の直下に配置し、且つ、第18図に示す如く
加圧面(21)と凹溝(31)とを対向せしめた状態で
プレス側ダイ(D)の下面(2O)とマンドレル(M)
の上面(30)との間に底壁部(7)の封止部位を挾持
して加熱下に圧縮する。Thereafter, the hollow cylindrical body (6) is heated to melt the resin coating layer, and placed directly under the press side die (D) as shown in FIG. 17, and as shown in FIG. 18. With the pressure surface (21) and groove (31) facing each other, the lower surface (2O) of the press side die (D) and the mandrel (M)
The sealing portion of the bottom wall portion (7) is sandwiched between the top surface (30) and the bottom wall portion (7) and compressed under heating.
このとき第17図に例示する折り重ね部(13)の肉厚
増加分は上記マンドレル(N4)の凹1芭(31)内に
嵌り込むから、プレス側グイ (1−1)の下面に設け
られた前記敵状突起(22)とマンドレル(M)の上面
に設置)られた前記敵状突起(33)との入れ吊状係合
によって前記折り重ね部(I3)は局部的に強く加圧さ
れる。該加圧により第10図に示す如く、突合わせ縁(
11)、(11)の周囲の溶融杉I脂(12)は前記隙
間(G2’)内に流入し液流出間隙を封鎖する。At this time, since the increased thickness of the folded portion (13) illustrated in FIG. 17 fits into the recess 1 (31) of the mandrel (N4), it is provided on the lower surface of the press side gouge (1-1). The folded portion (I3) is locally strongly pressurized by the hanging-like engagement between the enemy-like projection (22) and the enemy-like projection (33) installed on the upper surface of the mandrel (M). be done. As a result of this pressurization, the butt edge (
11), the molten cedar lubricant (12) around (11) flows into the gap (G2') and seals the liquid outflow gap.
即ち、隙間(02″)に流入した溶融樹脂(12)の冷
却同化によって中空筒体(6)の底壁部(7)には第1
0図および第18回に見られるよう7ざ強固な密封部位
が形成される。That is, by cooling and assimilating the molten resin (12) that has flowed into the gap (02''), the bottom wall (7) of the hollow cylinder (6) has a first layer.
As seen in Figure 0 and No. 18, a strong seal is formed.
以上の工程により底壁部(7)を密封された中空筒体(
6)内には図示しない充填装置から所定量の液状内容物
が充填され、この後、頂壁a++(2)の形成ならびに
密封工程に移る。Through the above steps, the bottom wall (7) is sealed with a hollow cylinder (
6) is filled with a predetermined amount of liquid content from a filling device (not shown), after which the process moves to the formation and sealing process of the top wall a++ (2).
先ず前記第4図に示す要領に従って中空筒体(6)の側
壁(9)、(9)の中央部を内側に折り曲げ、該中空f
li体(6)の端縁部を対向2字状に折り曲げて紙製容
器(1)の頂壁部(2)を予備成形する。然る後、上記
爪壁部(2)の対向2字状の端縁を、前記プレス側グイ
(I))“15よびマン1ルル(M)に設けられたも
のと同様の溶融4IA脂押出用畝状突起を有する金型(
図示せず)によって挟圧して頂壁部(2)の突合わせ縁
(10)、(10)間の間隙(Gl’)に溶融樹脂(1
2)を流入させて前記底壁部(7)と同様の強固な密封
部位を形成する(第8図および第10図参照)。First, the center portions of the side walls (9), (9) of the hollow cylinder (6) are bent inward according to the procedure shown in FIG.
The top wall portion (2) of the paper container (1) is preformed by bending the edge portion of the Li body (6) into two opposing shapes. After that, the opposite two-shaped edges of the claw wall part (2) were extruded with molten 4IA fat similar to that provided in the press side guide (I) "15" and the man 1 lulu (M). Mold with ridges for use (
(not shown) to fill the gap (Gl') between the abutting edges (10) of the top wall (2),
2) to form a strong seal similar to the bottom wall (7) (see FIGS. 8 and 10).
尚、前記プレス側グイ(D)およびマンドレル(P4)
に突設された溶融樹脂の流動促進用の敵状突起(22)
、(33)は、該敵状突起(22)、(33)の配列形
態を異にする金型ユニットを各種用意し7ておき、密封
すべき紙製容器(1)の形状や用途に応じて該敵状突起
の配列形態を;ガ択し1qるようにすることにより、紙
製容器(1)の切替Gご対し迅速に適応することができ
る。In addition, the press side guide (D) and mandrel (P4)
Enemy-shaped protrusions (22) protruding from the molten resin to promote flow of the molten resin.
, (33) prepares various mold units with different arrangement forms of the enemy-like protrusions (22) and (33), and prepares them according to the shape and purpose of the paper container (1) to be sealed. By selecting the arrangement form of the enemy-like protrusions in a different manner, it is possible to quickly adapt to the switching G of the paper container (1).
へ8発明の効果
本発明に係る液体充填用紙製容器の密封方法によれば、
紙製容器に強固な密封構造を形成せしめることができる
ため、在来の液体充填用紙製容器で問題となっていた内
容物の漏れ、容器内−・の細菌類や塵埃等の侵入を確実
に防止することができる。よって清潔で衛生的な液体充
填用紙製容器を提供することが可能になった。According to the method for sealing a liquid-filled paper container according to the present invention,
Since it is possible to form a strong sealing structure on the paper container, it ensures that the contents do not leak and that bacteria and dust enter the inside of the container, which was a problem with conventional liquid-filled paper containers. It can be prevented. Therefore, it has become possible to provide a clean and sanitary liquid-filled paper container.
更に本発明に係る液体充填用紙製容器の密封プlj’
i′j6において使用されるプし・ス側ダイおよびマン
ドレルは、在来装置に部分的な改造を施すのめで1!!
用可能で滓〕るから、本発明方法は在来の液状内容物の
充填ラインに大幅な改造を加える、二とな〈実施可能で
ある。従って−、最小の設備J$ 5’1によ−2て強
固な密封構造を有する液体充填用紙製容器を使用する充
填ラインを形成する、〕とができる。Furthermore, the sealing pull lj' of the liquid-filled paper container according to the present invention
The push-side die and mandrel used in i'j6 are 1! for partial modification of conventional equipment. !
Since the method of the present invention can be implemented with significant modifications to conventional liquid content filling lines. Therefore, it is possible to form a filling line using liquid-filled paper containers with a strong sealing structure with a minimum of J$5'1.
第1図は在来の液体充填用紙製容器の外観斜視図 第2
図は咳紙製容器を形成する原紙の展開ワ1、第3図(A
)、(B)け紙製容器の底壁部の折り曲げ構造を示す♀
11視図、第4図は紙製容器の頂壁部の折り曲げ構造を
例示するI’J視図4.第5図4−ンよび第6図は、在
来の紙製容器の頂壁部および底壁部の密封構造を示す部
分断面図、第7図は第5図および第6図に示す密封構造
の部分拡大横断面図、第8図およびff19図は本発明
方法によって封止された紙製容器の頂壁部および底壁部
を例示する外観斜視図、第10図は第8図および第9図
に示す頂壁部および底壁部の密封構造を示す部分拡大横
断面図、第11図は本発明方法に於いて底壁部の形成時
に使用されるプレス側グイおよび底面図、第12図(A
)、(B)は該プレス側グイの側面図および底面図、第
13図(A)、(B)は上記マンドレルの上面および側
面図、第14図は上記プレス側グイおよびマンドレルの
相対配設位置の説明図、第15図乃至第18図は本発明
方法による紙製容器の底壁部の成形工程を示す一部破断
側面図である。
(1)−液体充填用紙製容器、(2) −頂壁部、(4
)−原紙、(5)、(5’)−接合縁、(6)−中空筒
体、(7)・−底壁部、(8)、(8)および(9)、
(9) −側壁、(10)、(10)および(11)、
(11) −突合わせ縁、(12)−溶融樹脂、(22
)、(33)−・−敵状突起(Glo〉、(G2’)−
隙間。
【8こ
(A) 旧)
【゛4g
準it図
(A)
箱入4図
9へ13丙
(A)
(日)
115図
8
箪17図
I!18■Figure 1 is an external perspective view of a conventional liquid-filled paper container.
Figures 1 and 3 (A
), (B) shows the folded structure of the bottom wall of the paper container♀
11 is a perspective view, and FIG. 4 is an I'J perspective view illustrating the folding structure of the top wall of a paper container. Figures 5-4 and 6 are partial sectional views showing the sealing structure of the top wall and bottom wall of a conventional paper container, and Figure 7 is the sealing structure shown in Figures 5 and 6. 8 and ff19 are external perspective views illustrating the top and bottom walls of a paper container sealed by the method of the present invention, and FIG. FIG. 11 is a partially enlarged cross-sectional view showing the sealing structure of the top wall and bottom wall shown in FIG. (A
), (B) are side and bottom views of the press side gouer, Figures 13 (A) and (B) are top and side views of the mandrel, and Figure 14 is the relative arrangement of the press side goo and mandrel. 15 to 18 are partially cutaway side views showing the process of forming the bottom wall of a paper container according to the method of the present invention. (1) - liquid-filled paper container, (2) - top wall, (4
) - base paper, (5), (5') - joining edge, (6) - hollow cylinder, (7) - bottom wall, (8), (8) and (9),
(9) - side walls, (10), (10) and (11),
(11) - Butt edge, (12) - Molten resin, (22
), (33)-・-hostile process (Glo>, (G2')-
gap. [8ko (A) Old) [゛4g Semi-IT diagram (A) Boxed 4 Figure 9 to 13 C (A) (Japanese) 115 Figure 8 Tan 17 Figure I! 18■
Claims (1)
の原紙を折り曲げ、対向する一組の接合縁同志を重ね合
わせて溶着し、矩形もしくは正方形断面を有する中空筒
体を形成し、該中空前体の上下開口端において相対する
前記中空筒体の側壁の中央部を内側に折り曲げて対向Σ
字状の端縁形状を有する頂壁部または底壁部を形成し、
前記対向Σ字状を為す壁面の内部を密着状態に重ね合わ
せ、前記樹脂コーティング層の溶着によって前記重ね合
わせ部位を封止する液体充填用紙製容器の製造工程にお
いて、上記頂壁部または底壁部に前記対向Σ字状に折曲
げられた側壁中央の突合わせ縁と直交する敵状突起を有
する金型を押イ1け、該敵状突起の加圧による溶融樹脂
の流動を利用して前記突合わせ縁の近傍に残存し7てい
る隙間を封止することを特徴とする液体充填用紙製容器
の密封方法。(11) A substantially rectangular base paper having a resin coating layer on both the front and back sides is folded, and a pair of opposing joining edges are overlapped and welded to form a hollow cylindrical body having a rectangular or square cross section, and the hollow front body is The center portions of the side walls of the hollow cylindrical body facing each other at the upper and lower open ends of the body are bent inward to form opposing Σ
forming a top wall portion or a bottom wall portion having a letter-shaped edge shape;
In the manufacturing process of a liquid-filled paper container in which the insides of the opposing Σ-shaped walls are closely overlapped and the overlapping portion is sealed by welding the resin coating layer, the top wall portion or the bottom wall portion Press a mold having a protrusion perpendicular to the abutting edge at the center of the side wall bent in the opposed Σ shape, and use the flow of the molten resin due to the pressure of the protrusion to A method for sealing a liquid-filled paper container, characterized by sealing a gap remaining near the butt edge.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58234722A JPS60134844A (en) | 1983-12-12 | 1983-12-12 | Method of sealing vessel made of paper for filling liquid |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP58234722A JPS60134844A (en) | 1983-12-12 | 1983-12-12 | Method of sealing vessel made of paper for filling liquid |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS60134844A true JPS60134844A (en) | 1985-07-18 |
Family
ID=16975346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP58234722A Pending JPS60134844A (en) | 1983-12-12 | 1983-12-12 | Method of sealing vessel made of paper for filling liquid |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS60134844A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0176411U (en) * | 1987-11-09 | 1989-05-23 | ||
JPH01145426U (en) * | 1988-03-29 | 1989-10-05 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56157340A (en) * | 1980-05-09 | 1981-12-04 | Meiji Machine | Method of sealing bottom section of sealed vessel |
-
1983
- 1983-12-12 JP JP58234722A patent/JPS60134844A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS56157340A (en) * | 1980-05-09 | 1981-12-04 | Meiji Machine | Method of sealing bottom section of sealed vessel |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0176411U (en) * | 1987-11-09 | 1989-05-23 | ||
JPH01145426U (en) * | 1988-03-29 | 1989-10-05 |
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