JP2003225916A - Method for producing lid body - Google Patents

Method for producing lid body

Info

Publication number
JP2003225916A
JP2003225916A JP2002026454A JP2002026454A JP2003225916A JP 2003225916 A JP2003225916 A JP 2003225916A JP 2002026454 A JP2002026454 A JP 2002026454A JP 2002026454 A JP2002026454 A JP 2002026454A JP 2003225916 A JP2003225916 A JP 2003225916A
Authority
JP
Japan
Prior art keywords
top plate
small diameter
seal
cylindrical
plate portion
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
Application number
JP2002026454A
Other languages
Japanese (ja)
Inventor
Tomoki Kondou
智樹 近藤
Takuhiro Ogaki
拓洋 大垣
Munehisa Hattori
宗久 服部
Masayuki Takei
政幸 武井
Shusaku Takahashi
周作 高橋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hokkaican Co Ltd
Original Assignee
Hokkaican Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hokkaican Co Ltd filed Critical Hokkaican Co Ltd
Priority to JP2002026454A priority Critical patent/JP2003225916A/en
Publication of JP2003225916A publication Critical patent/JP2003225916A/en
Pending legal-status Critical Current

Links

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for producing a lid body which can form a seal having high sealing properties without increasing costs, and can easily form the seal even when the lid body is made of a metal having relatively high rigidity such as steel. <P>SOLUTION: A small diameter 8 is formed by contracting the entire circumference of an upper fringe of a cylinder 5 along the periphery of a roof 4 of a lid body 1a. Next, a material 13 of a seal 6 is supplied to the inner surface of the roof 4 turned upward by turning the lid body 1a upside down. A space 18 having a shape corresponding to the seal 6 is formed by making the tip of a cylindrical outer punch 15 inserted into the cylinder 5 contact with the inner circumference of the small diameter 8. The material 13, which was supplied to the inner surface of the roof 4 and melted, is pressed by a center punch 14 inserted into the outer punch 15, and the seal 6 is formed by supplying the material 13 into the space 18. <P>COPYRIGHT: (C)2003,JPO

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【発明の属する技術分野】本発明は、蓋体の製造方法に
関し、詳しくは容器開口部の先端周縁に密着して封止す
る合成樹脂製のシール部を備える蓋体の製造方法に関す
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a lid, and more particularly, to a method of manufacturing a lid provided with a synthetic resin sealing portion that closely adheres to and seals the peripheral edge of the tip of a container opening.

【0002】[0002]

【従来の技術】従来、特開昭55−134083号公報
に見られるような蓋体が知られている。この種の蓋体は
アルミニウム等の比較的剛性の低い金属によって形成さ
れ、容器開口部を閉塞する円形状の天板部と、容器開口
部のの外周に係合する円筒部とを備えている。天板部の
内面には、容器開口部を封止する合成樹脂製のシール部
が設けられている。
2. Description of the Related Art Heretofore, a lid as disclosed in Japanese Patent Laid-Open No. 55-134083 has been known. This kind of lid is formed of a metal having a relatively low rigidity such as aluminum, and includes a circular top plate portion that closes the container opening portion and a cylindrical portion that engages with the outer periphery of the container opening portion. . A seal portion made of synthetic resin for sealing the container opening is provided on the inner surface of the top plate portion.

【0003】該シール部は、蓋体を天地反転して上向き
とされた前記天板部の内面に所定量の溶融材料を供給し
た後、これをパンチによって押圧成形するインシェルモ
ールド法によって形成される。該シール部は、容器開口
部を封止するものであることから、該容器開口部の先端
縁に対応して凹状に形成されている。該シール部と円筒
部との間には間隙が形成されている。この間隙は、シー
ル部を成形する際に、天板部の内面に当接して溶融材料
の流出を規制するパンチの外側壁によって形成される。
そして、この間隙が形成されていると、シール部が容器
開口部の先端縁に圧接した際にシール部が外側にはみ出
して密封性が低下するため、キャッピング時に円筒部の
上端部を縮径変形させることでこの間隙を取除くように
している。
The seal portion is formed by an in-shell molding method in which a lid is turned upside down and a predetermined amount of a molten material is supplied to the inner surface of the top plate portion which is turned upside down, and then this is pressed by a punch. It Since the seal portion seals the container opening, it is formed in a concave shape corresponding to the tip edge of the container opening. A gap is formed between the seal portion and the cylindrical portion. This gap is formed by the outer side wall of the punch that abuts the inner surface of the top plate portion and regulates the outflow of the molten material when the seal portion is formed.
When this gap is formed, when the seal portion comes into pressure contact with the tip edge of the container opening, the seal portion protrudes to the outside and the sealing performance deteriorates. By doing so, this gap is removed.

【0004】しかし、キャッピング時に円筒部の上端部
を縮径させるために、キャッピング装置の構成が複雑に
なり調整に手間がかかるだけでなく、装置が高価となる
ために製造コストが高くなる不都合がある。
However, since the diameter of the upper end of the cylindrical portion is reduced during capping, the structure of the capping device becomes complicated and adjustment is troublesome, and the cost of the device is high, resulting in high manufacturing cost. is there.

【0005】そこで、特公平7−64361号公報に見
られるように、キャッピング時に円筒部の上端部を縮径
することなく高い密封性を有するシール部を形成する方
法が提案されている。この方法によれば、円筒部の上端
から所定間隔を存した下方位置に該円筒部の内側全周に
突出するように凹入された環状凹部を設ける。そして、
インシェルモールド法によってシール部を形成する際
に、該凹部にパンチの外周を密着させて形成された空間
に溶融材料を充填すると同時に該パンチによりシール部
を成形する。これにより、シール部の外側に間隙を設け
ることなくシール部を形成することができ、高い密封性
を有するシール部を容易に形成することができる。
Therefore, as disclosed in Japanese Patent Publication No. 7-64361, there has been proposed a method of forming a seal portion having a high hermeticity without reducing the diameter of the upper end of the cylindrical portion during capping. According to this method, the annular recessed portion is provided at a lower position spaced apart from the upper end of the cylindrical portion by a predetermined distance so as to project over the entire inner circumference of the cylindrical portion. And
When the seal portion is formed by the in-shell molding method, the space formed by bringing the outer periphery of the punch into close contact with the concave portion is filled with the molten material, and at the same time, the seal portion is formed by the punch. Accordingly, the seal portion can be formed without providing a gap outside the seal portion, and the seal portion having high sealing performance can be easily formed.

【0006】しかし、これによると、シール部の形成位
置だけでなく、シール部の外側の前記環状凹部とパンチ
の外周とによって形成された空間にも溶融材料を充填し
なければならないために、前述のキャッピング時に円筒
部の上端部を縮径させるものに比べて溶融材料の使用量
が多量となり、材料コストが増加する不都合がある。
According to this method, however, not only the position where the seal portion is formed, but also the space formed by the annular recess outside the seal portion and the outer circumference of the punch must be filled with the molten material. There is a disadvantage that the amount of the molten material used becomes large and the material cost increases as compared with the case where the diameter of the upper end of the cylindrical portion is reduced during capping.

【0007】また、前記環状凹部とパンチの外周とによ
って形成された空間に溶融材料を充填するとき、前記環
状凹部の成形精度が低いと、環状凹部とパンチの外周と
の間に隙間が生じて溶融材料が流出するおそれがある。
そして、蓋体がスチール等の比較的剛性の高い金属によ
って形成されている場合には、前記環状凹部を高精度に
設けることが困難となる不都合がある。
Further, when the molten material is filled in the space formed by the annular recess and the outer circumference of the punch, if the molding accuracy of the annular recess is low, a gap is created between the annular recess and the outer circumference of the punch. Molten material may flow out.
When the lid is made of a metal having a relatively high rigidity such as steel, it is difficult to provide the annular recess with high accuracy.

【0008】[0008]

【発明が解決しようとする課題】かかる不都合を解消し
て、本発明は、コストを増加させることなく高い密封性
を有するシール部を形成することができ、蓋体がスチー
ル等の比較的剛性の高い金属によって形成されていても
シール部を容易に形成することができる蓋体の製造方法
を提供することを目的とする。
In order to solve this inconvenience, the present invention can form a seal portion having a high hermeticity without increasing the cost, and the lid body is made of a relatively rigid material such as steel. It is an object of the present invention to provide a method for manufacturing a lid body that can easily form a seal portion even if it is made of high metal.

【0009】[0009]

【課題を解決するための手段】かかる目的を達成するた
めに、本発明は、容器開口部を閉塞する円形状の天板部
と、該天板部の周縁に連設されて容器開口部の外周に係
合する円筒部と、前記天板部の内面側に設けられ、容器
開口部の先端周縁に密着して封止する合成樹脂製のシー
ル部とを備える蓋体の製造方法であって、前記天板部の
周縁に沿った前記円筒部の上縁部全周を縮径して小径部
を形成する工程と、前記蓋体を天地反転して上向きとさ
れた前記天板部の内面に前記シール部の材料を供給する
工程と、前記円筒部に挿入された円筒状のアウターパン
チの先端を前記小径部の内周に当接し該小径部の内側に
前記シール部に対応する形状の空間を形成する工程と、
前記アウターパンチの内部に挿通されたセンターパンチ
により前記天板部の内面に供給されて溶融された前記シ
ール部の材料を押圧し、前記アウターパンチと小径部と
によって形成された前記空間内に該溶融材料を圧入して
前記シール部を形成する工程とを備えることを特徴とす
る。
In order to achieve such an object, the present invention provides a circular top plate portion that closes the container opening portion and a container opening portion that is connected to the peripheral edge of the top plate portion. A method for manufacturing a lid body, comprising: a cylindrical portion that engages with an outer periphery; and a synthetic resin seal portion that is provided on the inner surface side of the top plate portion and that closely adheres to and seals the tip peripheral edge of the container opening portion. , A step of forming a small diameter portion by reducing the entire diameter of the upper edge of the cylindrical portion along the peripheral edge of the top plate portion, and an inner surface of the top plate portion which is turned upside down by turning the lid body upside down. The step of supplying the material of the seal portion, and the tip of the cylindrical outer punch inserted into the cylindrical portion is brought into contact with the inner circumference of the small diameter portion so as to have a shape corresponding to the seal portion inside the small diameter portion. A step of forming a space,
The center punch inserted inside the outer punch presses the material of the seal portion which is supplied to the inner surface of the top plate portion and is melted, and the material is formed in the space formed by the outer punch and the small diameter portion. And a step of press-fitting a molten material to form the seal portion.

【0010】本発明によれば、前記シール部の材料を供
給する工程に先立って、前記小径部を形成する工程が行
なわれるので、シール部が形成された後に円筒部を縮径
させる作業を不要とすることができる。これにより、例
えば、キャッピング時に円筒部を縮径させることなく密
封性の高いシール部を形成することができ、キャッピン
グ装置に円筒部を縮径させる機構を設けることが不要と
なるので、コストを増加させることなく高い密封性を有
するシール部を形成することができる。
According to the present invention, since the step of forming the small diameter portion is performed prior to the step of supplying the material of the seal portion, the work of reducing the diameter of the cylindrical portion after the seal portion is formed is unnecessary. Can be As a result, for example, it is possible to form a seal portion having a high sealing property without reducing the diameter of the cylindrical portion during capping, and it is not necessary to provide a mechanism for reducing the diameter of the cylindrical portion in the capping device, which increases the cost. It is possible to form a seal portion having a high hermeticity without performing the above.

【0011】また、本発明によれば、前記小径部を、天
板部の周縁に沿った前記円筒部の上縁部全周を縮径して
形成するので、例えば従来のように円筒部の上端から所
定間隔を存した下方位置に該円筒部の内側全周に突出す
るように凹入された環状凹部を設ける場合に比べて、前
記小径部の成形が容易に行なえる。これによって、本発
明の方法は、蓋体の金属材料の剛性の大小によらずアル
ミ製の蓋体でもスチール製の蓋体でも同様に採用するこ
とができる。しかも、シール部は前記小径部の内方に形
成されるので、シール部の材料を増加させることなくシ
ール部を形成することができ、材料コストの増加を防止
することができる。
Further, according to the present invention, since the small diameter portion is formed by reducing the diameter of the entire upper edge portion of the cylindrical portion along the peripheral edge of the top plate portion, for example, as in the conventional case, The small-diameter portion can be molded more easily than in the case where an annular recess is provided at a lower position spaced apart from the upper end by a predetermined distance so as to project over the entire inner circumference of the cylindrical portion. As a result, the method of the present invention can be applied to the lid made of aluminum or the lid made of steel similarly regardless of the rigidity of the metal material of the lid. Moreover, since the seal portion is formed inside the small diameter portion, the seal portion can be formed without increasing the material of the seal portion, and the increase in material cost can be prevented.

【0012】また、本発明においては、板状の金属材料
から前記天板部と前記円筒部とを押圧成形する工程を備
え、該工程の押圧成形時に前記円筒部に小径部を形成す
る工程が行なわれることが好ましい。前記小径部を前記
天板部及び前記円筒部と同時に成形することによって、
工程数を増加させることなく小径部を形成することがで
き、蓋体の製造効率を向上させることができる。しか
も、前記天板部及び前記円筒部と共に前記小径部を極め
て高精度に形成することができるので、アウターパンチ
の先端を前記小径部の内周に当接したときに隙間が生じ
ることが防止され、アウターパンチと小径部とによって
形成された前記空間内に圧入された溶融材料の流れ出し
を確実に防止することができる。
Further, the present invention comprises a step of press-forming the top plate portion and the cylindrical portion from a plate-shaped metal material, and a step of forming a small diameter portion in the cylindrical portion during the press-forming of the step. It is preferably carried out. By molding the small diameter portion at the same time as the top plate portion and the cylindrical portion,
The small-diameter portion can be formed without increasing the number of steps, and the lid manufacturing efficiency can be improved. Moreover, since the small diameter portion can be formed with extremely high precision together with the top plate portion and the cylindrical portion, it is possible to prevent a gap from being generated when the tip of the outer punch is brought into contact with the inner circumference of the small diameter portion. It is possible to reliably prevent the molten material press-fitted into the space formed by the outer punch and the small diameter portion from flowing out.

【0013】また、本発明において、前記天板部の内面
に供給される前記シール部の材料は、前記円筒部の小径
部に対応する外径の円形状の合成樹脂製シート材である
ことが好ましい。シール部の材料として前記シート材を
採用し、該シート材を小径部に対応する外径に形成して
おくことによって、材料の供給時の天板部の内面への位
置決めが容易であり、精度の高いシール部を形成するこ
とができる。
Further, in the present invention, the material of the seal portion supplied to the inner surface of the top plate portion is a circular synthetic resin sheet material having an outer diameter corresponding to the small diameter portion of the cylindrical portion. preferable. By adopting the sheet material as the material of the seal portion and forming the sheet material with an outer diameter corresponding to the small diameter portion, it is easy to position on the inner surface of the top plate portion when the material is supplied, and the accuracy is improved. It is possible to form a highly sealed portion.

【0014】[0014]

【発明の実施の形態】本発明の一実施形態を図面に基づ
いて説明する。図1は本実施形態の方法により製造され
た蓋体を一部破断して示す説明図、図2は本実施形態の
各工程を示す説明図、図3はシール部を形成する工程に
おける要部の説明図である。
DETAILED DESCRIPTION OF THE INVENTION An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an explanatory view showing a lid body manufactured by the method of the present embodiment partially broken away, FIG. 2 is an explanatory view showing each step of the present embodiment, and FIG. 3 is a main part in a step of forming a seal portion. FIG.

【0015】本実施形態における蓋体1は、図1に示す
ように、容器2の開口部3に冠着され、該開口部3を閉
塞する天板部4と、該開口部3の外周を覆う円筒部5
と、天板部4の内面に設けられて開口部3の上縁に圧接
して封止するシール部6とを備えている。円筒部5には
螺条7が形成されており、該螺条7を介して容器2の開
口部3の外周に螺着されるようになっている。該円筒部
5の上縁部にはその全周にわたって縮径された小径部8
が形成されている。該小径部8は前記天板部4に連設さ
れており、これによって該天板部4は小径部8と同径と
されている。なお、本実施形態における小径部8の直径
は約45mmとされており、該蓋体1は所謂大径蓋に属し
ている。
As shown in FIG. 1, the lid 1 according to the present embodiment is provided with a top plate portion 4 which is attached to the opening 3 of the container 2 and closes the opening 3 and an outer periphery of the opening 3. Cylindrical part 5 to cover
And a seal portion 6 which is provided on the inner surface of the top plate portion 4 and press-contacts the upper edge of the opening portion 3 to seal it. A thread 7 is formed on the cylindrical portion 5, and the thread 7 is screwed to the outer circumference of the opening 3 of the container 2 via the thread 7. At the upper edge of the cylindrical portion 5, a small diameter portion 8 having a reduced diameter all around
Are formed. The small diameter portion 8 is connected to the top plate portion 4 so that the top plate portion 4 has the same diameter as the small diameter portion 8. The diameter of the small diameter portion 8 in this embodiment is about 45 mm, and the lid 1 belongs to a so-called large diameter lid.

【0016】前記シール部6は、薄肉に形成された中央
部9と、容器2の開口部3に当接する当接部10とを備
えている。当接部10には、容器2の開口部3の内周側
に当接される内側凸部11と、容器2の開口部3の外周
側に当接される外側凸部12とが形成されている。ま
た、該当接部10の外周は前記小径部8の内周に密着し
ており、容器2の開口部3に圧接されたときに外側凸部
12の過剰な変形が小径部8によって規制されている。
これにより、該シール部6は高い密封性を得ることがで
きる。なお、本実施形態におけるシール部6の中央部9
の最小厚み寸法は約0.7mmとされ、当接部10の最大
厚み寸法は約4mmとされている。
The seal portion 6 has a thin central portion 9 and an abutting portion 10 that abuts the opening 3 of the container 2. The abutting portion 10 is formed with an inner convex portion 11 that abuts on the inner peripheral side of the opening 3 of the container 2 and an outer convex portion 12 that abuts on the outer peripheral side of the opening 3 of the container 2. ing. Further, the outer periphery of the contact portion 10 is in close contact with the inner periphery of the small diameter portion 8, and when the outer protruding portion 12 is pressed against the opening 3 of the container 2, excessive deformation of the outer protruding portion 12 is restricted by the small diameter portion 8. There is.
As a result, the seal portion 6 can have high sealing performance. In addition, the central portion 9 of the seal portion 6 in the present embodiment.
Is about 0.7 mm, and the maximum thickness of the contact portion 10 is about 4 mm.

【0017】次に、本実施形態における蓋体1の製造方
法を説明する。先ず、図示しないプレス成形装置によっ
て板材をカップ状に押圧成形することにより、図2
(a)に示すように、天板部4、円筒部5、及び小径部
8からなる蓋体素材1aが一回の押圧により成形され
る。
Next, a method of manufacturing the lid 1 in this embodiment will be described. First, a plate material is press-molded into a cup shape by a press molding device (not shown).
As shown in (a), the lid material 1a including the top plate portion 4, the cylindrical portion 5, and the small diameter portion 8 is formed by pressing once.

【0018】次いで、天板部4の内面側にシール部6を
形成する合成樹脂材料であるシート材13を載置する。
該シート材13は、小径部8の内径よりも僅かに小径の
円形に形成されている。これにより、該シート材13
は、小径部8の内方に収容されて天板部4の内面に載置
される。該シート材13は、熱可塑性を有し且つ撥水性
を有する合成樹脂によって形成され、本実施形態におい
ては、スチレン系熱可塑性エラストマーであるS−EB
−S(スチレン−エチレン・ブチレン−スチレンブロッ
クコポリマー)が採用されている。また、該シート材1
3の厚み寸法は約1.3mmとされている。該シート材1
3は、例えば、板状のシートを円形に切り抜くことによ
って形成することができる。
Then, a sheet material 13 which is a synthetic resin material for forming the seal portion 6 is placed on the inner surface side of the top plate portion 4.
The sheet material 13 is formed in a circular shape having a diameter slightly smaller than the inner diameter of the small diameter portion 8. As a result, the sheet material 13
Are accommodated inside the small diameter portion 8 and placed on the inner surface of the top plate portion 4. The sheet material 13 is formed of a synthetic resin having thermoplasticity and water repellency, and in the present embodiment, S-EB which is a styrene-based thermoplastic elastomer.
-S (styrene-ethylene / butylene-styrene block copolymer) is used. Also, the sheet material 1
The thickness dimension of 3 is about 1.3 mm. The sheet material 1
3 can be formed, for example, by cutting a plate-shaped sheet into a circle.

【0019】続いて、天板部4の内面にシート材13を
載置した状態の蓋体素材1aを、図示しないオーブン内
に搬入し、シート材13を加熱溶融させる。このとき、
本実施形態においては約200℃で5〜7分間の加熱す
る。
Subsequently, the lid material 1a with the sheet material 13 placed on the inner surface of the top plate portion 4 is carried into an oven (not shown), and the sheet material 13 is heated and melted. At this time,
In this embodiment, heating is performed at about 200 ° C. for 5 to 7 minutes.

【0020】その後、蓋体素材1aをオーブンから搬出
し、図2(c)に示すように、溶融されたシート材13
の温度が低下する前に即座にセンターパンチ14とアウ
ターパンチ15とによってシート材13(溶融材料)を
押圧してシール部6を成形する。センターパンチ14と
アウターパンチ15とは図示しない昇降装置によって昇
降される。センターパンチ14は円柱状に形成されてお
り、その下面にシール部6の中央部9を押圧する押圧面
16を備えている。アウターパンチ15は円筒状に形成
されてセンターパンチ14の外周全周に摺接自在に設け
られている。アウターパンチ15は、図3(a)に一部
を示すように、先端部にシール部6の当接部10の内側
凸部11及び外側凸部12に対応する成形部17を備
え、該成形部17の外側縁が小径部8の内面に当接する
外径寸法に形成されている。
Thereafter, the lid material 1a is carried out of the oven, and as shown in FIG. 2 (c), the melted sheet material 13 is used.
Before the temperature decreases, the sheet material 13 (molten material) is immediately pressed by the center punch 14 and the outer punch 15 to form the seal portion 6. The center punch 14 and the outer punch 15 are moved up and down by an elevator device (not shown). The center punch 14 is formed in a cylindrical shape, and has a pressing surface 16 for pressing the central portion 9 of the seal portion 6 on the lower surface thereof. The outer punch 15 is formed in a cylindrical shape and is slidably attached to the entire outer circumference of the center punch 14. As shown in a part in FIG. 3A, the outer punch 15 is provided with a molding portion 17 corresponding to the inner convex portion 11 and the outer convex portion 12 of the abutting portion 10 of the seal portion 6 at a tip portion thereof, The outer edge of the portion 17 is formed to have an outer diameter dimension that contacts the inner surface of the small diameter portion 8.

【0021】ここで、図2(c)に示す工程について更
に詳しく説明すれば、先ず、図3(a)に示すように、
アウターパンチ15を下降させてその外側縁を小径部8
の内面に当接させる。これにより、シール部6の当接部
10に対応する形状の空間18が形成される。次いで、
センターパンチ14を下降させ、アウターパンチ15の
内側に位置する溶融されたシート材13を押圧する。こ
れにより、図3(b)に示すように、溶融されたシート
材13が中央部9から空間18に向かって流動する。そ
して溶融されたシート材13の中央部9の厚みが約0.
7mmになるまでセンターパンチ14を下降させると、溶
融されたシート材13が空間18内に圧入されて充填さ
れ、シール部6の当接部10が形成される。
Now, the process shown in FIG. 2C will be described in more detail. First, as shown in FIG.
The outer punch 15 is lowered so that the outer edge thereof has a small diameter portion 8
Abut the inner surface of. As a result, a space 18 having a shape corresponding to the contact portion 10 of the seal portion 6 is formed. Then
The center punch 14 is lowered to press the melted sheet material 13 located inside the outer punch 15. Thereby, as shown in FIG. 3B, the melted sheet material 13 flows from the central portion 9 toward the space 18. The thickness of the central portion 9 of the melted sheet material 13 is about 0.
When the center punch 14 is lowered to 7 mm, the melted sheet material 13 is press-fitted and filled in the space 18, and the contact portion 10 of the seal portion 6 is formed.

【0022】このとき、前記シート材13の周端部がア
ウターパンチ15の下方に位置する状態で溶融されてい
るので、センターパンチ14の押圧によって空間18内
に流入するシート材13の量は比較的少なく、極めて短
時間にシール部6を形成することができる。そして、シ
ール部6を形成したシート材13を冷却し、センターパ
ンチ14及びアウターパンチ15を上昇させて円筒部5
から離反させる。なお、このときの冷却は、図示しない
がセンターパンチ14に備えられた冷却手段によって行
なわれる。
At this time, since the peripheral edge portion of the sheet material 13 is melted in a state of being located below the outer punch 15, the amount of the sheet material 13 flowing into the space 18 by the pressing of the center punch 14 is compared. The seal portion 6 can be formed in an extremely short time with a very small amount. Then, the sheet material 13 on which the seal portion 6 is formed is cooled, and the center punch 14 and the outer punch 15 are raised to move the cylindrical portion 5
Away from. The cooling at this time is performed by a cooling means (not shown) provided in the center punch 14.

【0023】その後、円筒部5の端縁にカール部19を
形成し、該円筒部5の壁面に螺条7を形成することによ
り図1に示す蓋体1が形成される。このとき、図示しな
いキャッピング装置によって、容器に冠着状態で螺条7
を形成してもよい。
Thereafter, the curl portion 19 is formed on the end edge of the cylindrical portion 5, and the thread 7 is formed on the wall surface of the cylindrical portion 5, whereby the lid 1 shown in FIG. 1 is formed. At this time, the screw 7 is attached to the container in a capped state by a capping device (not shown).
May be formed.

【0024】このように、本実施形態に示す通り、シー
ト材13を供給する前工程において、既に前記小径部8
が形成されているので、シール部6を形成した後に円筒
部5の上縁部を縮径させることなく高い密封性を得るこ
とができる。また、小径部8は、蓋体素材1aの成形時
に天板部4と円筒部5と同時に形成されるので、該小径
部8を高い精度(真円度)で形成でき、前記アウターパ
ンチ15によって空間18を形成する際にアウターパン
チ15と小径部8とを隙間無く当接させることができ
る。
As described above, as shown in the present embodiment, the small-diameter portion 8 has already been formed in the preceding step of supplying the sheet material 13.
Therefore, high sealing performance can be obtained without reducing the diameter of the upper edge of the cylindrical portion 5 after forming the seal portion 6. Further, since the small diameter portion 8 is formed at the same time as the top plate portion 4 and the cylindrical portion 5 at the time of molding the lid material 1a, the small diameter portion 8 can be formed with high accuracy (roundness) and the outer punch 15 can be used. When forming the space 18, the outer punch 15 and the small diameter portion 8 can be brought into contact with each other without a gap.

【0025】また、シール部6の材料として該シート材
13を採用することによって、天板部4の内面に載置す
るだけで、小径部8の内方に位置決めされた状態で供給
することができる。
Further, by adopting the sheet material 13 as the material of the seal portion 6, the sheet material 13 can be supplied while being positioned inside the small-diameter portion 8 simply by placing it on the inner surface of the top plate portion 4. it can.

【0026】なお、本実施形態においては、蓋体1の材
料をスチールとしたが、アルミ等の他の金属を採用して
も同様の効果が得られることは言うまでもない。
Although the lid 1 is made of steel in the present embodiment, it is needless to say that the same effect can be obtained by using other metal such as aluminum.

【0027】また、本実施形態においては、天板部4及
び円筒部5と同時に小径部8を押圧成形して工程数を削
減した例を示したが、それ以外に、例えば、天板部4及
び円筒部5を形成した後に、シート材13の供給に先立
って小径部8を形成するようにしてもよい。
Further, in the present embodiment, an example in which the small-diameter portion 8 is press-formed at the same time as the top plate portion 4 and the cylindrical portion 5 to reduce the number of steps is shown. After forming the cylindrical portion 5, the small diameter portion 8 may be formed prior to the supply of the sheet material 13.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施形態の方法により製造された蓋
体を一部破断して示す説明図。
FIG. 1 is an explanatory view showing a lid body partially cut away, which is manufactured by a method according to an embodiment of the present invention.

【図2】本実施形態の各工程を示す説明図。FIG. 2 is an explanatory diagram showing each step of the present embodiment.

【図3】シール部を形成する工程における要部の説明
図。
FIG. 3 is an explanatory diagram of a main part in a process of forming a seal part.

【符号の説明】[Explanation of symbols]

1…蓋体、2…容器、3…開口部、4…天板部、5…円
筒部、6…シール部、8…小径部、13…シート材、1
4…センターパンチ、15…アウターパンチ、18…空
間。
DESCRIPTION OF SYMBOLS 1 ... Lid body, 2 ... Container, 3 ... Opening part, 4 ... Top plate part, 5 ... Cylindrical part, 6 ... Seal part, 8 ... Small diameter part, 13 ... Sheet material, 1
4 ... Center punch, 15 ... Outer punch, 18 ... Space.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 服部 宗久 埼玉県岩槻市上野4−5−15 北海製罐株 式会社技術本部内 (72)発明者 武井 政幸 埼玉県岩槻市上野4−5−15 北海製罐株 式会社技術本部内 (72)発明者 高橋 周作 埼玉県岩槻市上野4−5−15 北海製罐株 式会社技術本部内 Fターム(参考) 3E084 BA01 CA01 CC01 CC02 DA01 DB12 DC01 DC02 FA09 FB02 GA04 GB04 HA02 HB03 HC03 HD02 HD03 HD04 4F204 AA04 AA12 AA13 AA45 AD03 AG03 AG21 AH57 FA20 FB01 FB11 FF01 FF05 FF49 FN04 FN07 FN09 FN11    ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Munehisa Hattori             4-5-15 Ueno, Iwatsuki-shi, Saitama Hokkai Seikan Co., Ltd.             Inside the company headquarters (72) Inventor Masayuki Takei             4-5-15 Ueno, Iwatsuki-shi, Saitama Hokkai Seikan Co., Ltd.             Inside the company headquarters (72) Inventor Shusaku Takahashi             4-5-15 Ueno, Iwatsuki-shi, Saitama Hokkai Seikan Co., Ltd.             Inside the company headquarters F-term (reference) 3E084 BA01 CA01 CC01 CC02 DA01                       DB12 DC01 DC02 FA09 FB02                       GA04 GB04 HA02 HB03 HC03                       HD02 HD03 HD04                 4F204 AA04 AA12 AA13 AA45 AD03                       AG03 AG21 AH57 FA20 FB01                       FB11 FF01 FF05 FF49 FN04                       FN07 FN09 FN11

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】容器開口部を閉塞する円形状の天板部と、
該天板部の周縁に連設されて容器開口部の外周に係合す
る円筒部と、前記天板部の内面側に設けられ、容器開口
部の先端周縁に密着して封止する合成樹脂製のシール部
とを備える蓋体の製造方法であって、 前記天板部の周縁に沿った前記円筒部の上縁部全周を縮
径して小径部を形成する工程と、 前記蓋体を天地反転して上向きとされた前記天板部の内
面に前記シール部の材料を供給する工程と、 前記円筒部に挿入された円筒状のアウターパンチの先端
を前記小径部の内周に当接し該小径部の内側に前記シー
ル部に対応する形状の空間を形成する工程と、 前記アウターパンチの内部に挿通されたセンターパンチ
により前記天板部の内面に供給されて溶融された前記シ
ール部の材料を押圧し、前記アウターパンチと小径部と
によって形成された前記空間内に該溶融材料を圧入して
前記シール部を形成する工程とを備えることを特徴とす
る蓋体の製造方法。
1. A circular top plate portion for closing a container opening,
A cylindrical portion which is continuously provided on the peripheral edge of the top plate portion and engages with the outer periphery of the container opening portion, and a synthetic resin which is provided on the inner surface side of the top plate portion and closely adheres to the peripheral edge of the tip end of the container opening portion. A method of manufacturing a lid body including a seal portion made of, wherein a step of forming a small diameter portion by reducing the entire diameter of the upper edge portion of the cylindrical portion along the peripheral edge of the top plate portion, the lid body The step of supplying the material of the seal portion to the inner surface of the top plate portion which is turned upside down and is directed upward, and the tip of the cylindrical outer punch inserted into the cylindrical portion contacts the inner circumference of the small diameter portion. A step of contacting and forming a space having a shape corresponding to the seal portion inside the small diameter portion, and the seal portion which is supplied to the inner surface of the top plate portion by the center punch inserted inside the outer punch and melted Formed by the outer punch and the small diameter part And a step of press-fitting the molten material into the space to form the seal portion.
【請求項2】板状の金属材料から前記天板部と前記円筒
部とを押圧成形する工程を備え、該工程の押圧成形時に
前記円筒部に小径部を形成する工程が行なわれることを
特徴とする請求項1記載の蓋体の製造方法。
2. A step of press-forming the top plate portion and the cylindrical portion from a plate-shaped metal material, wherein a step of forming a small diameter portion in the cylindrical portion is performed during the press-forming of the step. The method for manufacturing a lid according to claim 1.
【請求項3】前記天板部の内面に供給される前記シール
部の材料は、前記円筒部の小径部に対応する外径の円形
状の合成樹脂製シート材であることを特徴とする請求項
1又は2記載の蓋体の製造方法。
3. The material of the seal portion supplied to the inner surface of the top plate portion is a circular synthetic resin sheet material having an outer diameter corresponding to the small diameter portion of the cylindrical portion. Item 3. A method for manufacturing a lid according to item 1 or 2.
JP2002026454A 2002-02-04 2002-02-04 Method for producing lid body Pending JP2003225916A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2002026454A JP2003225916A (en) 2002-02-04 2002-02-04 Method for producing lid body

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2002026454A JP2003225916A (en) 2002-02-04 2002-02-04 Method for producing lid body

Publications (1)

Publication Number Publication Date
JP2003225916A true JP2003225916A (en) 2003-08-12

Family

ID=27748282

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2002026454A Pending JP2003225916A (en) 2002-02-04 2002-02-04 Method for producing lid body

Country Status (1)

Country Link
JP (1) JP2003225916A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005111758A (en) * 2003-10-06 2005-04-28 Daiwa Can Co Ltd Manufacturing method of cap with liner for heat-resistant metal/pp cap

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51507Y1 (en) * 1968-07-12 1976-01-09
JPS5492839U (en) * 1977-12-12 1979-06-30
JPS55134083A (en) * 1979-12-20 1980-10-18 Crown Cork Japan Method of hermetically sealing vessel
JPS6264742A (en) * 1985-09-18 1987-03-23 株式会社 柴崎製作所 Cap with liner
JPH0431254A (en) * 1990-05-25 1992-02-03 Shibasaki Seisakusho:Kk Metal cap
JPH09221160A (en) * 1996-02-13 1997-08-26 Toyo Seikan Kaisha Ltd Composite lid of metal and synthetic resin and its manufacture
JP2000255622A (en) * 1999-03-04 2000-09-19 Kuraray Co Ltd Cap for container with sealing liner fitted thereto
JP2001294251A (en) * 2000-04-12 2001-10-23 Toyo Seikan Kaisha Ltd Metal container with cap and its manufacturing method

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51507Y1 (en) * 1968-07-12 1976-01-09
JPS5492839U (en) * 1977-12-12 1979-06-30
JPS55134083A (en) * 1979-12-20 1980-10-18 Crown Cork Japan Method of hermetically sealing vessel
JPS6264742A (en) * 1985-09-18 1987-03-23 株式会社 柴崎製作所 Cap with liner
JPH0431254A (en) * 1990-05-25 1992-02-03 Shibasaki Seisakusho:Kk Metal cap
JPH09221160A (en) * 1996-02-13 1997-08-26 Toyo Seikan Kaisha Ltd Composite lid of metal and synthetic resin and its manufacture
JP2000255622A (en) * 1999-03-04 2000-09-19 Kuraray Co Ltd Cap for container with sealing liner fitted thereto
JP2001294251A (en) * 2000-04-12 2001-10-23 Toyo Seikan Kaisha Ltd Metal container with cap and its manufacturing method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2005111758A (en) * 2003-10-06 2005-04-28 Daiwa Can Co Ltd Manufacturing method of cap with liner for heat-resistant metal/pp cap

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