JP2008222280A

JP2008222280A - Synthetic-resin plug

Info

Publication number: JP2008222280A
Application number: JP2007064780A
Authority: JP
Inventors: Toshimasa Fujishiro; 年正藤城; Hiroto Kodama; 洋人児玉
Original assignee: Aicello Chemical Co Ltd
Current assignee: Aicello Chemical Co Ltd
Priority date: 2007-03-14
Filing date: 2007-03-14
Publication date: 2008-09-25
Anticipated expiration: 2027-03-14
Also published as: JP5191147B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simply-manufacturable synthetic resin-molded plug which can hermetically close a take-out opening of a container in a sealable/openable manner via packing, which prevents the coming-off of the packing when the take-out opening is opened, and which is firmly constituted in such a manner as not to be cracked or fractured, even if it is exposed to an impact or vibrations from outside. <P>SOLUTION: The molded plug 1 is a synthetic resin-molded plug which makes the container 2 hermetically closed by being screwed or fitted into the take-out opening provided in the container 2, while covering the take-out opening via the packing 12 brought into contact with the take-out opening. The packing 12 is fitted into a recessed storage space 13 in the inner wall 11 of the top surface of the molded plug 1. A packing locking protrusion 16, which is intermittently protruded from an inner wall 15 of a side surface of the storage space 13, is provided along a lower edge of the storage space 13. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、液体や固体を充填し貯蔵したり運搬したりするのに用いられる容器の取出口を、密封開放可能に密閉する成型栓に関するものである。 The present invention relates to a molded stopper that seals an outlet of a container used for filling, storing and transporting liquids and solids so that the container can be hermetically opened.

薬液や飲料のような液体、固体薬品や固形物のような固体等を充填し、貯蔵したり、運搬したりした後、それら内容物を取出すのに、合成樹脂性容器が用いられる。容器の取出口は、内容物が漏れ出さないように、適度な弾性と硬さとを有するパッキンを介して、合成樹脂性スクリュー栓等で覆われて、密封開放可能に密閉されている。 A synthetic resin container is used to take out the contents after filling, storing or transporting a liquid such as a chemical solution or a beverage, a solid such as a solid medicine or a solid, and the like. The outlet of the container is covered with a synthetic resin screw stopper or the like through a packing having appropriate elasticity and hardness so that the contents do not leak out, and is sealed so that the container can be opened.

このような栓からパッキンが脱落しないように、栓の内空にパッキンを押し込み栓の内壁に沿ってリング状に突き出したパッキン係止突起で支えている。 In order to prevent the packing from dropping off from such a plug, the packing is pushed into the inner space of the plug and supported by a packing locking protrusion protruding in a ring shape along the inner wall of the plug.

例えば、特許文献１には、パッキン収容部の形状が金型通りにならず先細りとなりパッキンが圧迫されて脱落してしまうのを防ぐために、キャップ内面頂部に有するパッキン室の上部角部に溝部が設けられ、キャップ内面の全周に渡るリング状のパッキン係止凸条を有する合成樹脂性キャップが、開示されている。 For example, in Patent Document 1, a groove portion is formed at the upper corner portion of the packing chamber at the top of the inner surface of the cap in order to prevent the shape of the packing housing portion from tapering without being in accordance with the mold and being compressed and falling off. A synthetic resin cap having a ring-shaped packing locking projection provided over the entire circumference of the inner surface of the cap is disclosed.

リング状のパッキン係止突起は、パッキンとの接触面積が広いうえ、均等にパッキンを支えることができる。しかし、外界の温度上昇によるパッキンの軟化や、温度下降によるパッキンの収縮や、内容物の揮発による内圧上昇や、輸送時の振動・衝撃の所為で、パッキンの一部が捩れてリング状のパッキン係止突起から外れてしまうと、摩擦のために元に戻り難くなり連鎖的にパッキンの全体が外れてしまう。その結果、パッキンが容易に脱落し、内容物が遺漏する。さらにパッキンの緩衝がなくなってキャップが、振動や衝撃によって破損し易くなる。 The ring-shaped packing locking projection has a wide contact area with the packing and can support the packing evenly. However, due to the softening of the packing due to an increase in the external temperature, the contraction of the packing due to the decrease in temperature, the increase in internal pressure due to the volatilization of the contents, and the vibration and impact during transportation, a part of the packing is twisted to form a ring-shaped packing. If it comes off from the locking projection, it will be difficult to return to the original due to friction, and the entire packing will come off in a chain. As a result, the packing easily falls off and the contents are leaked. Further, the cushioning of the packing is lost, and the cap is easily damaged by vibration and impact.

パッキン係止突起を大きくしてパッキンを外れ難くすると、容器口に干渉し気密が保てなくなったり、形状が複雑となって成型し難くなったり、金型を引抜き難くなって引抜きによるパッキン係止突起を破損させたりする。パッキン係止突起に代えて接着剤でパッキンと栓とを直接接着させるのは、内容物の飲料や食品に臭いが移行したり、又は内容物の高純度薬品液に接着剤が混入したりするので、敬遠されている。 If it is difficult to remove the packing by enlarging the packing locking projection, it will interfere with the container mouth and it will not be possible to keep the air tight, the shape will be complicated and it will be difficult to mold, or the mold will be difficult to pull out, and the packing will be locked by pulling out. Damage the protrusion. Adhering the packing and stopper directly with an adhesive instead of the packing locking protrusion causes the odor to be transferred to the beverage or food of the contents, or the adhesive is mixed into the high-purity chemical liquid of the contents So be shy.

特開平１１−１６５７５９号公報JP-A-11-165759

本発明はこのような課題を解決するためになされたもので、パッキンを介して容器の取出口を密封開放可能に密閉し、開放した時にこのパッキンが脱落せず、しかも外部からの衝撃や振動に曝されても亀裂を生じたり破断したりせず強固であって、簡便に製造できる合成樹脂性の成型栓を提供することを目的とする。 The present invention has been made to solve such a problem, and the container outlet is sealed through the packing so that the container can be opened. When the container is opened, the packing does not fall off, and the impact and vibration from the outside It is an object of the present invention to provide a synthetic resin molded plug that is strong and does not crack or break even when exposed to water and can be easily manufactured.

前記の目的を達成するためになされた特許請求の範囲の請求項１に記載の成型栓は、容器に開けられた取出口と接するパッキンを介して覆いつつ螺合又は嵌合して該容器を密閉する合成樹脂製の成型栓であって、該パッキンが、該成型栓の天面内壁で窪んだ収容スペースに嵌り込んでおり、該収容スペースの下縁に沿って、該収容スペースの側面内壁から断続的に突き出たパッキン係止突起が、設けられていることを特徴とする。 In order to achieve the above object, the molded stopper according to claim 1 is formed by screwing or fitting the container while covering it with a packing in contact with the outlet opened in the container. A sealing plug made of a synthetic resin to be sealed, in which the packing is fitted in a receiving space that is recessed in the inner wall on the top surface of the molding plug, and the inner wall on the side surface of the receiving space along the lower edge of the receiving space A packing latching protrusion protruding intermittently from is provided.

請求項２に記載の成型栓は、請求項１に記載されたもので、該天面内壁とそれに直交する該側面内壁とで形成される該収容スペースのコーナーが、半径０．１〜１．０ｍｍで湾曲していることを特徴とする。 The molding plug according to claim 2 is the molding stopper according to claim 1, wherein corners of the accommodation space formed by the top inner wall and the side inner wall perpendicular to the top wall have a radius of 0.1 to 1.. It is characterized by being curved at 0 mm.

請求項３に記載の成型栓は、請求項１に記載されたもので、該パッキン係止突起の全長と、隣り合う該パッキン係止突起の間の距離との比が、１：１０〜１０：１であることを特徴とする。 According to a third aspect of the present invention, there is provided the molded plug according to the first aspect, wherein the ratio of the total length of the packing locking protrusions to the distance between the adjacent packing locking protrusions is 1: 10-10. : 1.

請求項４に記載の成型栓の金型は、容器に開けられる取出口と接するパッキンを介して覆いつつ螺合又は嵌合して該容器を密閉する合成樹脂製の成型栓を、成型する金型であって、該パッキンが該成型栓の天面内壁に嵌り込む収容スペースを形成させる凸部と、該収容スペースの側面内壁から断続的に突き出すパッキン係止突起を、該凸部の下縁に沿って形成させる凹部とを有し、該成型栓の内面を形作る雄金型、及び該雄金型を覆い該成型栓の外面を形作る雌金型からなることを特徴とする。 The mold for molding plug according to claim 4 is a mold for molding a molded plug made of a synthetic resin that seals the container by screwing or fitting while covering through a packing that contacts an outlet that is opened in the container. A convex portion for forming an accommodation space in which the packing fits into the inner wall of the top surface of the molding plug, and a packing locking projection protruding intermittently from the inner side wall of the accommodation space. A male mold that forms the inner surface of the molded plug, and a female mold that covers the male mold and forms the outer surface of the molded plug.

本発明の成型栓は、パッキンを介して容器の取出口を密封開放可能に、しっかりと密閉でき、内容物を容器内で貯蔵したり運搬したりする際に、遺漏させない。 The molded stopper of the present invention can be tightly sealed so that the outlet of the container can be opened and sealed through the packing, and does not leak when the contents are stored or transported in the container.

パッキンが断続的なパッキン係止突起で係止されているから、パッキンの一部がパッキン係止突起から外れてしまっても別なパッキン係止突起で係止し続ける結果、パッキンが脱落しない。そのため、栓で密閉して、静置している間でも、外部からの振動や衝撃に曝されている間でも、栓を開放した時でも、このパッキンが脱落しない。しかも振動や衝撃で、亀裂を生じたり破断したりしない。 Since the packing is locked by the intermittent packing locking projection, even if a part of the packing is detached from the packing locking projection, the packing continues to be locked by another packing locking projection, so that the packing does not fall off. For this reason, the seal does not fall off even when the stopper is opened, whether it is sealed with a stopper and left standing, exposed to vibration or impact from the outside. Moreover, it does not crack or break due to vibration or impact.

本発明の成型栓も金型も簡易な構成であるので、簡便かつ大量に、生産効率よく製造することができる。しかも製造過程で、成型栓は、その破損や劣化や不良品形成を惹き起こさないから、生産性の向上に資する。 Since the molding stopper and the mold of the present invention have a simple configuration, they can be manufactured easily and in large quantities with high production efficiency. In addition, in the manufacturing process, the molded plug does not cause breakage, deterioration or defective product formation, which contributes to improvement in productivity.

発明を実施するための好ましい形態Preferred form for carrying out the invention

以下、本発明の好ましい実施の形態を、詳細に説明するが、本発明の範囲はこれらの形態に限定されるものではない。 Hereinafter, preferred embodiments of the present invention will be described in detail, but the scope of the present invention is not limited to these embodiments.

本発明の実施の一形態の成型栓１は、熱可塑性合成樹脂を金型で成型して、形成されたものである。成型栓１は、その一部切欠き側面図である図１のように、容器２に開けられた取出口３（図３参照）を覆いつつ螺合し、取出口３と接する円板状のパッキン１２を介して、密封開放可能に容器２を密閉している。成型栓１は、略円筒形で、上端が塞がれている。その円筒の軸芯に対して垂直にその円筒上端を塞いでいる天面の内壁１１が、窪んで、パッキン１２を嵌め込む収容スペース１３を形成している。収容スペース１３の下縁の周囲に沿って、収容スペース１３の側面内壁１５から断続的に突き出たパッキン係止突起１６が、設けられている。パッキン係止突起１６(ａ)〜１６(ｆ)は、収容スペース１３の下縁の周囲を均等に分割した夫々の区分毎に、一定間隔で、並んでいる。パッキン係止突起１６の上面は水平となって、パッキン１２に密着している。このパッキン係止突起１６により、パッキン１２が、脱落しないように支えられている。天面内壁１１とそれに直交する側面内壁１５とで形成される収容スペース１３のコーナー１４が、湾曲してアール形状を形成している。側面内壁１５の下方に、雌ねじ１７が設けられている。成型栓１の外壁には、縦突条１８が設けられている。 The molding plug 1 according to an embodiment of the present invention is formed by molding a thermoplastic synthetic resin with a mold. As shown in FIG. 1, which is a partially cutaway side view, the molded plug 1 is screwed while covering the outlet 3 (see FIG. 3) opened in the container 2, and is in the shape of a disk in contact with the outlet 3. The container 2 is sealed through the packing 12 so as to be openable. The molded plug 1 has a substantially cylindrical shape and is closed at the upper end. An inner wall 11 on the top surface that closes the upper end of the cylinder perpendicular to the axis of the cylinder is recessed to form an accommodation space 13 into which the packing 12 is fitted. A packing locking protrusion 16 protruding intermittently from the side inner wall 15 of the storage space 13 is provided along the periphery of the lower edge of the storage space 13. The packing locking protrusions 16 (a) to 16 (f) are arranged at regular intervals for each section obtained by equally dividing the periphery of the lower edge of the accommodation space 13. The upper surface of the packing locking projection 16 is horizontal and is in close contact with the packing 12. The packing 12 is supported by the packing locking projections 16 so as not to drop off. A corner 14 of the accommodation space 13 formed by the top inner wall 11 and the side inner wall 15 orthogonal thereto is curved to form a rounded shape. A female screw 17 is provided below the side inner wall 15. A vertical protrusion 18 is provided on the outer wall of the molded stopper 1.

なお、成型栓１が螺合している例を示したが、嵌合するものであってもよい。 In addition, although the example in which the molded plug 1 is screwed is shown, it may be fitted.

パッキン係止突起１６は、収容スペース１３の下縁、例えばその円状周囲を均等に２〜１２分割した夫々の区分毎に、並んでいてもよい。分割数は、２分割以上であればパッキン脱落防止に効果がある。１２分割より多いと成型加工の難易度が非常に高くなってしまうため実用的ではない。好ましくは４〜１０分割、より好ましくは４〜８分割である。 The packing locking protrusions 16 may be arranged for each of the sections obtained by equally dividing the lower edge of the accommodation space 13, for example, the circular periphery thereof, into 2 to 12 parts. If the number of divisions is two or more, it is effective in preventing the packing from falling off. If there are more than 12 divisions, the difficulty of the molding process becomes very high, so it is not practical. Preferably it is 4-10 divisions, More preferably, it is 4-8 divisions.

パッキン係止突起１６は、収容スペース１３の下縁の周囲で、均等に並んで配置されることが好ましい。パッキン係止突起１６の円弧状の全長Ｌ_１と、隣り合うパッキン係止突起の円弧状間隙の距離Ｌ_２との比が、１：１０〜１０：１であることが好ましく、１：２〜２：１であるとより好ましい。パッキン係止突起１６の全長が、パッキン係止突起１６の間隙の１／１０未満になると、パッキン係止が有効に機能しなくなってしまう。パッキン係止突起１６の全長が、パッキン係止突起１６の間隙の１０倍を越えると、パッキンが捩れて一つのパッキン係止突起１６から外れたときに、隣り合うパッキン係止突起１６からもパッキンが外れ易くなってしまって、パッキン係止突起がリング状の場合と同様な結果をもたらしてしまう。 It is preferable that the packing locking projections 16 are arranged evenly around the lower edge of the accommodation space 13. The total length _{L 1} arcuate packing locking projection 16, the ratio of the distance of the arc-shaped gap between the adjacent packing locking projection _{L 2} is 1: 10 to 10: 1, more preferably 1: 2 to 2: 1 is more preferable. If the total length of the packing locking projections 16 is less than 1/10 of the gap between the packing locking projections 16, the packing locking will not function effectively. When the total length of the packing locking projections 16 exceeds 10 times the gap between the packing locking projections 16, when the packing is twisted and separated from one packing locking projection 16, the packing locking projections 16 adjacent to each other also have packing. Is likely to come off, resulting in the same result as when the packing locking projection is ring-shaped.

成型栓１の天面内壁１１は、収容スペース１３の側面内壁１５に対し、垂直であり、それらが接合されているコーナー１４が、半径０．１〜１．０ｍｍで湾曲していると、振動や衝撃による応力が分散され、亀裂を生じたり破断したりしない。このコーナー１４が直角乃至は鋭角の断面を有していると、そこに振動や衝撃による応力が集中し、亀裂や破断を生じてしまう。 If the top inner wall 11 of the molded plug 1 is perpendicular to the side inner wall 15 of the housing space 13 and the corner 14 to which they are joined is curved with a radius of 0.1 to 1.0 mm, vibration occurs. And stress due to impact is dispersed and does not crack or break. If the corner 14 has a right-angle or acute-angle cross section, stress due to vibration or impact concentrates on the corner 14 and a crack or break occurs.

このような湾曲に伴う収容スペース１３の体積の減少により、パッキン１２が幾分外れ易くなってしまうのを防止するために、収容スペース１３の高さを、パッキン１２の厚さ程度、例えば＋２０％〜−１０％にすることが好ましい。この範囲を下回ると、パッキン１２の遊びが大き過ぎて、熱や振動等によりパッキン１２が脱落し易くなり、一方この範囲を超えると、パッキン１２がパッキン係止突起１６を乗り越えて脱落し易くなる。 In order to prevent the packing 12 from being somewhat easily detached due to the decrease in the volume of the accommodation space 13 due to such bending, the height of the accommodation space 13 is set to about the thickness of the packing 12, for example, + 20%. It is preferable to make it -10%. Below this range, the play of the packing 12 is too large, and the packing 12 easily falls off due to heat, vibration, etc. On the other hand, beyond this range, the packing 12 gets over the packing locking projection 16 and easily falls off. .

このような成型栓１は、図２に示す略円柱状で成型栓１の内面を形作る雄金型２０(ａ)と、雄金型２０(ａ)を覆い成型栓１の外面を形作る雌金型２０(ｂ_１)及び２０(ｂ_２)とからなる金型で形成されるキャビティ３０で、熱可塑性合成樹脂を加熱しつつ充填することによって得られる。 Such a molded plug 1 has a substantially cylindrical shape shown in FIG. 2 and a male mold 20 (a) that forms the inner surface of the molded plug 1, and a female mold that covers the male mold 20 (a) and forms the outer surface of the molded plug 1. It is obtained by filling a thermoplastic synthetic resin while heating it in a cavity 30 formed of a mold composed of molds 20 (b ₁ ) and 20 (b ₂ ).

この雄金型２０(ａ)は、パッキン１２が成型栓１の天面内壁１１に嵌り込む収容スペース１３を形成（図１参照）させる凸部２２と、収容スペース１３の側面内壁１５から断続的に突き出すパッキン係止突起１６（図１参照）を、凸部２２の下縁に沿って形成させる凹部２６とを有している。凸部２２の上端外周２４は、成型栓１の内壁のコーナー１４に対応して湾曲している。雄金型２０(ａ)は、凹部２６よりも下方にネジ山２７が設けられている。 The male mold 20 (a) is intermittently formed from a convex portion 22 that forms a storage space 13 (see FIG. 1) in which the packing 12 fits into the top inner wall 11 of the molding plug 1 and a side inner wall 15 of the storage space 13. And a recess 26 for forming a packing locking protrusion 16 (see FIG. 1) protruding along the lower edge of the protrusion 22. The upper end outer periphery 24 of the convex portion 22 is curved corresponding to the corner 14 of the inner wall of the molding plug 1. The male die 20 (a) is provided with a screw thread 27 below the recess 26.

雌金型２０(ｂ_１)及び２０(ｂ_２)は、雄金型２０(ａ)を覆うように突き合わされて、それらの間に、成型栓１を成型するためのキャビティ３０を形成する。 The female molds 20 (b ₁ ) and 20 (b ₂ ) are abutted so as to cover the male mold 20 (a), and a cavity 30 for molding the molding plug 1 is formed therebetween.

成型栓１は、通常の成型方法、例えばこの間隙に、熱可塑性樹脂を加熱しながら充填させて成型した後、雌金型２０(ｂ_１)及び２０(ｂ_２)を外し、雄金型２０(ａ)を引抜いたりねじ回して抜き取ったりすることによって得られる。成型栓１は、その半身毎に、別々に成型した後、接合したものであってもよい。 The molding plug 1 is formed by a normal molding method, for example, by filling the gap with a thermoplastic resin while heating, and then removing the female molds 20 (b ₁ ) and 20 (b ₂ ) and then male male mold 20. It can be obtained by pulling out (a) or pulling out (a). The molded plug 1 may be one that is molded separately for each half and then joined.

以下に、本発明を適用する成型栓を試作した例を実施例１に示し、本発明を適用外の成型栓を試作した例を比較例１〜２に示す。 In the following, an example in which a molded plug to which the present invention is applied is prototyped is shown in Example 1, and an example in which a molded plug to which the present invention is not applied is prototyped is shown in Comparative Examples 1-2.

（実施例１）
成型栓１の作製には、図２に示す雄金型２０(ａ)と雌金型２０(ｂ_１)及び２０(ｂ_２)とを用いた。雄金型２０(ａ)は、直径約４５ｍｍで高さ約２５ｍｍの略円柱のもので、成型栓１中のパッキン１２が嵌り込む収容スペース１３に対応する凸部２２を有している。その凸部上端外周は、半径０．２ｍｍで湾曲したアール形状となっている。雄金型２０(ａ)は、成型栓１中の収容スペース１３の側面内壁１５から断続的に突き出すパッキン係止突起１６を形成させる水平な上端平面を有する凹部２６が、凸部２２の下縁に沿って均等に６つ配列されている。その６つの凹部２６は、パッキン係止突起１６の円弧状の全長Ｌ_１と隣り合うパッキン係止突起例えば１６(ａ)・１６(ｂ)の間隙の円弧状の距離Ｌ_２との比３：２に相当する比で、配列されている。凹部２６より下部方向に、成型栓１の雌ねじ１７を形成するネジ山２７が、ねじ切られている。 (Example 1)
For the production of the molding stopper 1, a male mold 20 (a) and female molds 20 (b ₁ ) and 20 (b ₂ ) shown in FIG. 2 were used. The male mold 20 (a) has a substantially cylindrical shape with a diameter of about 45 mm and a height of about 25 mm, and has a convex portion 22 corresponding to the accommodating space 13 into which the packing 12 in the molding plug 1 is fitted. The outer periphery of the upper end of the convex portion has a rounded shape with a radius of 0.2 mm. The male mold 20 (a) has a concave portion 26 having a horizontal upper end plane for forming a packing locking projection 16 protruding intermittently from the side inner wall 15 of the housing space 13 in the molding plug 1. Are equally arranged along the line. Its six recesses 26, the ratio of the arcuate distance L ₂ of the gap of the packing retaining projections such as 16 is adjacent to the entire length L ₁ arcuate packing locking projection 16 (a) · 16 (b ) 3: They are arranged in a ratio corresponding to 2. A thread 27 that forms the female thread 17 of the molded plug 1 is threaded downward from the recess 26.

雌金型２０(ｂ_１)及び２０(ｂ_２)は、雄金型２０(ａ)を覆うように突き合わされて、それらの間に、成型栓１の側壁となる厚さ約２．３ｍｍのキャビティ３０を形成する。キャビティ３０には、離型剤（不図示）が塗布される。 The female molds 20 (b ₁ ) and 20 (b ₂ ) are abutted so as to cover the male mold 20 (a), and a thickness of about 2.3 mm serving as a side wall of the molded plug 1 is interposed therebetween. A cavity 30 is formed. A release agent (not shown) is applied to the cavity 30.

熱可塑性合成樹脂である直鎖状低密度ポリエチレンを、加熱しながら、キャビティ３０に充填し、放冷し、成型させてから、金型を外すと、前記側壁の厚さで、コーナー１４が前記湾曲した成型栓外形が得られた。それのパッキン収容スペース１３に、ゴム弾性を有するパッキン１２を押し込み、パッキン係止突起例えば１６で係止すると、成型栓１が得られた。 When the linear low density polyethylene, which is a thermoplastic synthetic resin, is heated, filled into the cavity 30, allowed to cool, molded, and then removed from the mold, the corner 14 becomes the thickness of the side wall. A curved molded plug profile was obtained. When the rubber-elastic packing 12 was pushed into the packing accommodating space 13 and locked with a packing locking protrusion 16, for example, a molded plug 1 was obtained.

得られた成型栓１の６０検体について、６０℃で、成型栓に配置されたパッキンに、水圧０．２５ＭＰａの水流を当てたとき、パッキンが脱落した成型栓は、６０検体中、０検体であった。また、成型栓の１０検体について、内容量５Ｌの容器に内容物として水を満量充填し、その取出口をこの型栓でしっかりしめた。成型栓を下側に向けて高さ１．５ｍから垂直に自然落下させたとき、このコーナーに亀裂が生じ成型栓が破損し内容物が遺漏した成型栓は、１０検体中、０検体であった。 With respect to the 60 samples of the molded plug 1 obtained, when 60 ° C. was applied to the packing disposed in the molded plug with a water flow of a water pressure of 0.25 MPa, the molded plug from which the packing dropped was 0 samples out of 60 samples. there were. Further, about 10 specimens of the molded plugs, a container having a capacity of 5 L was filled with a full amount of water as the contents, and the outlet was firmly secured with this mold plug. When the molded plug was naturally dropped vertically from a height of 1.5 m with the molded plug facing downward, the molded plug was cracked at this corner and the molded plug was damaged and the contents leaked out of 10 samples. It was.

（比較例１）
実施例１の断続的なパッキン係止突起に代えて、連続した一体のリング状のパッキン係止突起としたこと以外は、実施例１と同様にして、成型栓を得た。それの６０検体について、６０℃で、成型栓に配置されたパッキンに、水圧０．２５ＭＰａの水流を当てたとき、パッキンが脱落した成型栓は、６０検体中、７検体であった。 (Comparative Example 1)
A molded plug was obtained in the same manner as in Example 1 except that instead of the intermittent packing locking protrusions of Example 1, a continuous integral ring-shaped packing locking protrusion was used. Of the 60 specimens, when 60 ° C. was applied to the packing disposed in the molded stopper with a water flow having a water pressure of 0.25 MPa, the number of molded stoppers from which the packing dropped was 7 out of 60 specimens.

（比較例２）
実施例１の湾曲したコーナー１４に代えて、角度が９０°のコーナーを有すること以外は、実施例１と同様にして、成型栓を得た。その１０検体について、内容量５Ｌの容器に内容物として水を満量充填し、その取出口をこの型栓でしっかりしめた。成型栓を下側に向けて高さ１．５ｍから垂直に自然落下させた。このコーナーに亀裂が生じ成型栓が破損し内容物が遺漏した成型栓は、１０検体中、６検体であった。 (Comparative Example 2)
Instead of the curved corner 14 of Example 1, a molded plug was obtained in the same manner as in Example 1 except that the corner had a 90 ° angle. About the 10 specimens, a container with a capacity of 5 L was filled with a full amount of water as the contents, and the outlet was firmly secured with this mold stopper. The molding stopper was naturally dropped vertically from a height of 1.5 m with the downward direction. There were 6 specimens out of 10 specimens in which the corners were cracked, the molded stoppers were broken, and the contents were leaked.

比較例１及び２の成型栓は、実施例１の成型栓よりも、パッキンが脱落したり内容物が遺漏したりするものの割合が高かった。 Compared with the molded plug of Example 1, the molded plugs of Comparative Examples 1 and 2 had a higher percentage of the packing falling off or the contents leaking out.

（参考例１）
実施例１の６つのパッキン係止突起に代えて、１４個のパッキン係止突起としたこと以外は、実施例１と同様にして、成型栓を得た。成型栓は、パッキン係止突起の数が多いことに起因して、成型が困難となり、所望の大きさのパッキン係止突起を有する成型栓は、８割程度しか得られなかった。それの６０検体について、６０℃で、成型栓に配置されたパッキンに、水圧０．２５ＭＰａの水流を当てたとき、パッキンが脱落した成型栓は、６０検体中、１２検体であった。 (Reference Example 1)
A molded plug was obtained in the same manner as in Example 1 except that 14 packing locking projections were used instead of the 6 packing locking projections of Example 1. Molding plugs are difficult to mold due to the large number of packing locking projections, and only about 80% of molding plugs having packing locking projections of a desired size were obtained. With respect to 60 samples, when 60 ° C. was applied to the packing disposed in the molded plug with a water flow having a water pressure of 0.25 MPa, the number of molded plugs from which the packing dropped was 12 samples out of 60 samples.

参考例１のように、パッキン係止突起の数が多すぎると、パッキンが脱落するものの割合が増えた。 As in Reference Example 1, when the number of the packing locking protrusions was too large, the ratio of the packing falling off increased.

本発明の成型栓は、高純度のフォトレジスト液のような薬液、飲料やその原材料液等の液体、固形薬品や固形物等の固体を、密閉容器に充填し、貯蔵したり、運搬したりする際に、パッキンを介して容器の取出口を密封開放可能に密閉するのに用いられる。 The molded stopper of the present invention fills a sealed container with a liquid such as a high-purity photoresist liquid, a liquid such as a beverage or its raw material liquid, a solid chemical or a solid, and stores or transports the solid container. In this case, it is used to seal the container outlet through the packing so that the container can be opened.

この成型栓の金型は、このような成型栓を簡便かつ大量に製造する際に用いられる。 The mold of this molded plug is used when such molded plugs are manufactured easily and in large quantities.

本発明を適用する成型栓の一部を切り欠いた側面図である。It is the side view which notched a part of shaping | molding stopper to which this invention is applied. 本発明を適用する成型栓の金型を示す側面図である。It is a side view which shows the metal mold | die of the shaping | molding stopper to which this invention is applied. 本発明を適用する成型栓の使用途中を示す斜視図である。It is a perspective view which shows the middle of use of the shaping | molding stopper to which this invention is applied.

符号の説明Explanation of symbols

１は成型栓、２は容器、３は取出口、１１は天面内壁、１２はパッキン、１３は収容スペース、１４はコーナー、１５は側面内壁、１６はパッキン係止突起、１７は雌ねじ、１８は縦突条、２０(ａ)は雄金型、２０(ｂ_１)・２０(ｂ_２)は雌金型、２２は金型凸部、２４は凸部上端外周、２６は金型凹部、２７はネジ山、３０はキャビティ、Ｌ_１はパッキン係止突起の全長、Ｌ_２は隣り合うパッキン係止突起の間隙の距離である。 1 is a molded stopper, 2 is a container, 3 is an outlet, 11 is a top inner wall, 12 is packing, 13 is a storage space, 14 is a corner, 15 is a side inner wall, 16 is a packing locking projection, 17 is a female screw, 18 Is a vertical die, 20 (a) is a male die, 20 (b ₁ ), 20 (b ₂ ) is a female die, 22 is a convex portion of the die, 24 is an outer periphery of the upper end of the convex portion, 26 is a concave portion of the die, 27 threads, 30 cavity, L ₁ is the total length of the packing locking projection, L ₂ is the distance of the gap of the packing engaging adjacent protrusions.

Claims

容器に開けられた取出口と接するパッキンを介して覆いつつ螺合又は嵌合して該容器を密閉する合成樹脂製の成型栓であって、該パッキンが、該成型栓の天面内壁で窪んだ収容スペースに嵌り込んでおり、該収容スペースの下縁に沿って、該収容スペースの側面内壁から断続的に突き出たパッキン係止突起が、設けられていることを特徴とする成型栓。 A synthetic resin molded plug that seals the container by screwing or fitting while covering through a packing that is in contact with an outlet opened in the container, and the packing is recessed on the inner wall of the top surface of the molded plug A molded stopper characterized in that it is fitted in a storage space, and is provided with a packing locking projection protruding intermittently from the inner wall of the side surface of the storage space along the lower edge of the storage space.

該天面内壁とそれに直交する該側面内壁とで形成される該収容スペースのコーナーが、半径０．１〜１．０ｍｍで湾曲していることを特徴とする請求項１に記載の成型栓。 2. The molded plug according to claim 1, wherein a corner of the accommodation space formed by the inner wall of the top surface and the inner wall of the side surface orthogonal thereto is curved with a radius of 0.1 to 1.0 mm.

該パッキン係止突起の全長と、隣り合う該パッキン係止突起の間の距離との比が、１：１０〜１０：１であることを特徴とする請求項１に記載の成型栓。 2. The molded plug according to claim 1, wherein a ratio of a total length of the packing locking protrusions to a distance between adjacent packing locking protrusions is 1:10 to 10: 1.

容器に開けられる取出口と接するパッキンを介して覆いつつ螺合又は嵌合して該容器を密閉する合成樹脂製の成型栓を、成型する金型であって、該パッキンが該成型栓の天面内壁に嵌り込む収容スペースを形成させる凸部と、該収容スペースの側面内壁から断続的に突き出すパッキン係止突起を、該凸部の下縁に沿って形成させる凹部とを有し、該成型栓の内面を形作る雄金型、及び該雄金型を覆い該成型栓の外面を形作る雌金型からなることを特徴とする成型栓の金型。 A mold for molding a synthetic resin molded plug that seals the container by screwing or fitting while covering through a packing that is in contact with an outlet that is opened in the container, and the packing is the top of the molded plug A convex portion that forms a storage space that fits into the inner wall, and a concave portion that forms a packing locking projection protruding intermittently from the inner wall of the side surface of the storage space along the lower edge of the convex portion. A mold for a molded plug comprising: a male mold for forming the inner surface of the stopper; and a female mold for covering the male mold and forming the outer surface of the molded stopper.