JP3796594B2 - Molding method of synthetic resin casing - Google Patents

Molding method of synthetic resin casing Download PDF

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Publication number
JP3796594B2
JP3796594B2 JP31479796A JP31479796A JP3796594B2 JP 3796594 B2 JP3796594 B2 JP 3796594B2 JP 31479796 A JP31479796 A JP 31479796A JP 31479796 A JP31479796 A JP 31479796A JP 3796594 B2 JP3796594 B2 JP 3796594B2
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Japan
Prior art keywords
diameter
flange
mouth tube
synthetic resin
blow
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JPH10156929A (en
Inventor
善男 秋山
孝之 後藤
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Yoshino Kogyosho Co Ltd
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Yoshino Kogyosho Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/42—Component parts, details or accessories; Auxiliary operations
    • B29C49/72—Deflashing outside the mould
    • B29C49/74—Deflashing the neck portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/22—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor using multilayered preforms or parisons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/30—Preforms or parisons made of several components
    • B29C2949/3086—Interaction between two or more components, e.g. type of or lack of bonding
    • B29C2949/3094—Interaction between two or more components, e.g. type of or lack of bonding preform having at least partially loose components, e.g. at least partially loose layers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2009/00—Layered products
    • B29L2009/001—Layered products the layers being loose

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Description

【０００１】
【産業上の利用分野】
本発明は、定形の外殻を形成する外層内に、変形自在な内袋を形成する内層を剥離自在に積層成形し、外観形状を変化を発生させることなく、かつ内容液収納部に外気を侵入させることなく、内容液の注出使用を可能とした合成樹脂製ブロー成形壜体の成形方法に関するものである。
【０００２】
【従来の技術】
定形の外殻を形成する外層内に、変形自在な内袋を形成する内層を剥離自在に積層して構成した合成樹脂製ブロー成形壜体においては、内層の内容積減少に伴う変形、すなわち潰れ変形が不定形になることを防止するために、外層と内層の一部、例えば少なくとも壜体の口筒部および底部において、外層と内層とを接着等により固定している（特開平４−３３９７５９号公報参照）。
【０００３】
また、この種の積層壜体において、ポンプ付きキャップを備えた壜体の場合、口筒部における外層と内層との固定は、内層の上端部を外層の上端面上に位置させ、この外層上端面上に位置した内層の上端部を、キャップ内のパッキンと外層上端面とで挟持することによって達成している。
【０００４】
そして、このキャップ内のパッキンと外層上端面とによる内層上端部の挟持幅を広くすることにより、その挟持強度を強固にして、口筒部における内層の固定を確実にしたものとして、特開平８−１４３０８０号公報記載の技術が提案されている。
【０００５】
すなわち、該公報記載の合成樹脂製壜体は、外殻を形成する外層に、内袋を形成する内層を剥離自在に積層したブロー壜体の口筒部上端に、内方から外方に湾曲反転した反転フランジを一体設して、口部上端面を形成する反転フランジの上面を内層上端部が形成する構成とし、この反転フランジを壜体に一体にブロー成形されたネック部バリからの切除残存部分で構成したものである。
【０００６】
【発明が解決しようとする課題】
上記特開平８−１４３０８０号公報に記載の合成樹脂製壜体においては、ブロー成形により口筒部上端の反転フランジを一体付形するものであるため、成形時にブロー成形金型に接しない面である内層内面によって形成される反転フランジの上面は、必ずしも充分な平滑性が得られ難く、そのため該反転フランジ上面とキャップ内のパッキン下面との間のシール性が充分でない場合が生ずる、という問題があった。
【０００７】
そこで、本発明は、上記した従来技術における問題点を解消すべく創案されたもので、壜体のパッキングラウンドとなる反転フランジ上面に充分な平滑性を付与することを技術的課題とし、もってキャップと壜体口筒部上端面との間のシール性を向上させることを目的とする。
【０００８】
【課題を解決するための手段】
上記技術的課題を解決する本発明の手段は、
定形の外殻を形成する合成樹脂製の外層と、この外層に剥離自在に積層され、内袋を形成する可撓性合成樹脂製の内層とから壜体をブロー成形する方法に関するものであること、
段部下面を水平周状の平滑な押圧面としたブローヘッドを、パリソンの上端開口部に、押圧面が、ブロー成形金型の口筒部成形用型面部分の上端に内鍔状に設けられたフランジ部に上方から対向する所定位置まで押込んで、キャップが螺合組付けされる円筒状の口筒部の上端に、内方から外方に湾曲反転して、前記口筒部の外径よりも充分に大きい外径の連結フランジを有するネック部バリを一体に成形すること、
このネック部バリを、壜体のブロー成形処理の完了後、連結フランジの内側部分を反転フランジとして口筒部に残存させて切断除去すること、
にある。
【０００９】
ブローヘッドは、中心部に送気孔が貫設されていると共に、パリソンの内径と略同径の外径を有し、かつ外周面下端部に、下方へ縮径する傾斜ガイド面を周設した小径筒部の上端に、水平周状の平滑な押圧面を介して拡径された大径筒部を形成した構成とするのが良い。
【００１０】
【作用】
壜体の口筒部上端に付形される反転フランジは、この口筒部の上端部を、内方に湾曲させてから外方に湾曲反転させて成形されるものであるので、その上面には内層の上端部が位置することになる。
【００１１】
そして、この反転フランジの上面は、成形時におけるブローヘッドの押圧面による押圧によって、充分な平滑性を有するものとなる。
【００１２】
この反転フランジの上面は、口筒部の上端面、すなわちパッキングラウンドを形成する部分であるので、口筒部にキャップを螺合組付けした際には、キャップに組付けられているパッキンが密に押圧され、これによりキャップと外層との間で内層の上端部が強固に挟持固定されることになると共に、その充分な平滑性により、パッキンとの間のシール性が確実なものとなる。
【００１３】
【実施例】
以下、図１ないし図５を参照しながら、本発明の一実施例を説明する。
図１は、本発明による壜体１に、ポンプ付きキャップ８を螺合組付けした状態の壜体１とキャップ８本体部分を半縦断図示したもので、壜体１は、高密度ポリエチレン樹脂製の外層２と、ナイロン製の内層３とを、共押出し成形手段により積層円筒状に押出し成形したパリソンからブロー成形され、円筒形状をした口筒部４の外周面には、キャップ８を螺合組付けするための螺条が刻設されている。
【００１４】
図２に示すように、口筒部４の上端には、この口筒部４上端部分を内方から外方に湾曲反転させることにより、直下に外周溝６を形成した状態で、平滑な上面を有すると共に、口筒部４と等しい外径のリング状の反転フランジ５が一体に連設されている。
【００１５】
図３ないし図５は、本発明成形方法の実施例の要部を示したもので、まず、図３に示すように、壜体１のブロー成形時に、この壜体１と一体にネック部バリ７を、ブローヘッド１１により押圧成形する。
【００１６】
すなわち、このブローヘッド１１は、中心部に送気孔１６が貫設されていると共に、パリソン２０の内径と略同径か、または若干大径の外径を有する小径筒部１２の上端に、水平周状の平滑な押圧面１３を介して拡径された、口筒部４よりも充分に大径な大径筒部１４が形成されており、かつ上記小径筒部１２の外周面下端部には、下方へ縮径する傾斜ガイド面１５が周設されている。
【００１７】
そこで、口筒部４成形用型面部分の上端に、幅の小さい内鍔状のフランジ部１０ａを設けたブロー成形金型１０にセットされたパリソン２０の上端開口部に、上方からブローヘッド１１を下降させてその先端の小径筒部１２を押し込むと、ブローヘッド１１の押圧面１３によりパリソン２０の上端部は押し拡げられて外側に湾曲し、ネック部バリ７が成形される。
【００１８】
そして、ブロー成形金型１０のフランジ部１０ａに対して、ブローヘッド１１の押圧面１３がネック部バリ７を挟んでその上面を押圧する所定の位置でブローヘッド１１が停止し、しかる後、送気孔１６から空気を吹込んで、フランジ部１０ａよりも下位となるパリソン２０部分を、壜体１にブロー成形する。
【００１９】
壜体１と一体に成形されたネック部バリ７は、壜体１の口筒部４の上端から、内方に屈曲状に湾曲してから上方に立ち上がって外方に湾曲反転した連結フランジ７ａを有しており、この連結フランジ７ａは、口筒部４の外径よりも充分に大きい外径を持ち、かつその上面は、ブローヘッド１１の押圧面１３の押圧により充分な平滑性を有するものとなっている。
【００２０】
壜体１と一体に成形されたネック部バリ７は、壜体１のブロー成形処理の完了後、連結フランジ７ａの口筒部４の外径と等しい外径位置となるカット位置Ｋで上下に切断されることにより、壜体１から切除（図４参照）されるが、壜体１側に口筒部４の上端に連設された状態で残存した連結フランジ７ａの内側部分がそのまま反転フランジ５（図５参照）となる。
【００２１】
ネック部バリ７の連結フランジ７ａの切断加工は、連結フランジ７ａが口筒部４よりも大きい外径を有していること、および連結フランジ７ａの直下に外周溝６が形成されていることにより、この外周溝６に受け板を組付けた状態で、上方から口筒部４の外径と等しい径の筒状刃で達成することにより、安全にかつ確実にそして正確にさらに簡単に達成することができる。
【００２２】
この反転フランジ５は、口筒部４の上端部を内方から外方に湾曲反転して成形されたものであるので、その上面には内層３の上端部が位置することになり、このため口筒部４にキャップ８を螺合組付けした状態では、キャップ８のパッキン９と外層２の上端部との間で内層３の上端部が強固に挟持固定され、口筒部４における内層３の上端部の外層２に対する不動な固定を達成すると共に、この内層３上面の充分な平滑性により、反転フランジ５上面とパッキン９下面との間の確実なシールが達成される（図１、図２参照）。
【００２３】
このキャップ８と外層２上端部とによる内層３上端部の挟持に際して、反転フランジ５の直下に形成された外周溝６は、反転フランジ５に弾性を付与するものとして機能するので、内層３上端部の不動な挟持をより強固で安定したものとすることになる。
【００２４】
【発明の効果】
本発明は、上記した構成となっているので、以下に示す効果を奏する。
壜体のパッキングラウンドとなる反転フランジ上面には、成形時におけるブローヘッドの押圧面による押圧によって充分な平滑性が付与されるので、キャップのパッキンとの間のシール性を大幅に向上させることができる。
【図面の簡単な説明】
【図１】本発明による壜体の一実施例を示す、キャップを組付けた状態における右半縦断面図。
【図２】図１に示した実施例の要部拡大縦断面図。
【図３】本発明の成形方法の一実施例を示す、ネック部バリ成形状態の部分拡大図。
【図４】図３に示した実施例の、ネック部バリ切除前の部分拡大図。
【図５】図３に示した実施例の、ネック部バリ切除後の部分拡大図。
【符号の説明】
１ ； 壜体
２ ； 外層
３ ； 内層
４ ； 口筒部
５ ； 反転フランジ
６ ； 外周溝
７ ； ネック部バリ
７ａ ； 連結フランジ
８ ； キャップ
９ ； パッキン
１０ ； ブロー金型
１０ａ； フランジ部
１１ ； ブローヘッド
１２ ； 小径筒部
１３ ； 押圧面
１４ ； 大径筒部
１５ ； 傾斜ガイド面
１６ ； 送気孔
２０ ； パリソン
Ｋ ； カット位置[0001]
[Industrial application fields]
In the present invention, an inner layer forming a deformable inner bag is laminated and formed in an outer layer forming a fixed outer shell so that the outer shape can be peeled off, and the external liquid can be discharged to the content liquid storage unit without causing a change in appearance. The present invention relates to a method of molding a synthetic resin blow-molded casing that enables the content liquid to be poured out without intrusion.
[0002]
[Prior art]
In a blow molded housing made of synthetic resin, which is formed by detachably stacking an inner layer that forms a deformable inner bag in an outer layer that forms a fixed outer shell, deformation due to a decrease in the inner volume of the inner layer, that is, collapse In order to prevent the deformation from becoming indefinite, the outer layer and the inner layer are fixed to each other by bonding or the like at least at the mouth tube portion and the bottom portion of the outer layer and the inner layer (for example, JP-A-4-339759). No. publication).
[0003]
Further, in this type of laminated case, in the case of a case having a pump cap, the outer layer and the inner layer in the mouth tube portion are fixed by positioning the upper end of the inner layer on the upper end surface of the outer layer. This is achieved by sandwiching the upper end portion of the inner layer located on the end surface between the packing in the cap and the upper end surface of the outer layer.
[0004]
Then, by widening the clamping width of the inner layer upper end portion between the packing in the cap and the outer layer upper end surface, it is assumed that the clamping strength is strengthened and the inner layer is fixed in the mouth tube portion. A technique described in Japanese Patent No. 143080/1990 has been proposed.
[0005]
That is, the synthetic resin case described in the publication is curved from the inside to the outside at the upper end of the blow tube body in which the outer layer forming the outer shell and the inner layer forming the inner bag are detachably laminated. An inverted reversing flange is integrated so that the upper end of the reversing flange that forms the upper end surface of the mouth is formed by the upper end of the inner layer, and the reversing flange is cut from the neck burr that is integrally blow-molded into the housing. It consists of the remaining part.
[0006]
[Problems to be solved by the invention]
In the synthetic resin casing described in the above-mentioned JP-A-8-143080, the reverse flange at the upper end of the mouth tube part is integrally formed by blow molding, so that it is not in contact with the blow mold during molding. The upper surface of the reversing flange formed by the inner surface of a certain inner layer does not necessarily have sufficient smoothness, and therefore there is a problem that the sealing performance between the upper surface of the reversing flange and the lower surface of the packing in the cap may not be sufficient. there were.
[0007]
Therefore, the present invention was devised to solve the above-described problems in the prior art, and it is a technical problem to provide sufficient smoothness to the upper surface of the reversing flange that becomes the packing round of the casing, and thus the cap. It aims at improving the sealing performance between the housing and the upper end surface of the housing mouth tube portion.
[0008]
[Means for Solving the Problems]
The means of the present invention for solving the above technical problem is:
The present invention relates to a method of blow molding a casing from a synthetic resin outer layer that forms a fixed outer shell and a flexible synthetic resin inner layer that is peelably laminated on the outer layer to form an inner bag. ,
A blow head with a stepped lower surface that is a smooth pressing surface with a horizontal circumference is provided in the upper end opening of the parison, and the pressing surface is provided in the shape of an inner collar at the upper end of the mold surface portion for forming the tube portion of the blow molding die. The flange portion is pushed to a predetermined position facing from above, and the upper end of the cylindrical mouth tube portion to which the cap is screwed and assembled is bent and reversed from the inside to the outside. Integrally forming a neck burr having a connecting flange with an outer diameter sufficiently larger than the diameter;
This neck part burr is cut and removed by leaving the inner part of the connecting flange as an inverted flange in the mouth tube part after completion of the blow molding process of the housing ,
It is in.
[0009]
The blow head has an air supply hole penetrating in the center, an outer diameter that is substantially the same as the inner diameter of the parison, and an inclined guide surface that is reduced in diameter downward at the lower end of the outer peripheral surface. It is preferable to form a large-diameter cylindrical portion that is expanded through a horizontal circumferential smooth pressing surface at the upper end of the small-diameter cylindrical portion.
[0010]
[Action]
The reversing flange attached to the upper end of the mouth tube portion of the housing is formed by bending the upper end portion of the mouth tube portion inwardly and then reversing outwardly. Is the upper end of the inner layer.
[0011]
And the upper surface of this inversion flange has sufficient smoothness by the press by the press surface of the blow head at the time of shaping | molding.
[0012]
Since the upper surface of the reversing flange is the upper end surface of the mouth tube portion, that is, the portion that forms the packing round, when the cap is screwed and assembled to the mouth tube portion, the packing attached to the cap is tight. As a result, the upper end of the inner layer is firmly clamped and fixed between the cap and the outer layer, and the sufficient smoothness ensures the sealing performance with the packing.
[0013]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
FIG. 1 is a half longitudinal view of a housing 1 and a cap 8 main body in a state where a pump cap 8 is screwed and assembled to the housing 1 according to the present invention. The housing 1 is made of a high-density polyethylene resin. The outer layer 2 and the nylon inner layer 3 are blow molded from a parison obtained by extrusion molding into a laminated cylindrical shape by coextrusion molding means, and a cap 8 is screwed onto the outer peripheral surface of the cylindrical mouth tube portion 4 Screws for assembling are engraved.
[0014]
As shown in FIG. 2, the upper end of the mouth tube portion 4 has a smooth upper surface in a state where the outer peripheral groove 6 is formed immediately below by reversing the upper end portion of the mouth tube portion 4 from the inside to the outside. And a ring-shaped reversing flange 5 having an outer diameter equal to that of the mouth tube portion 4 is integrally provided.
[0015]
FIGS. 3 to 5 show the main part of an embodiment of the molding method of the present invention. First, as shown in FIG. 7 is press-molded by the blow head 11.
[0016]
That is, the blow head 11 has an air supply hole 16 penetrating through a central portion thereof, and is horizontally disposed at an upper end of a small diameter cylindrical portion 12 having an outer diameter that is substantially the same as or slightly larger than the inner diameter of the parison 20. A large-diameter cylindrical portion 14 having a diameter sufficiently larger than that of the mouth tube portion 4 is formed through the circumferential smooth pressing surface 13, and is formed at the lower end portion of the outer peripheral surface of the small-diameter cylindrical portion 12. Is provided with an inclined guide surface 15 that is reduced in diameter downward.
[0017]
Therefore, the blow head 11 from above is inserted into the upper end opening of the parison 20 set in the blow molding die 10 provided with the narrow inner flange portion 10a at the upper end of the mold surface portion for forming the mouth tube portion 4. When the small-diameter cylindrical portion 12 at the tip is pushed down, the upper end portion of the parison 20 is pushed and expanded by the pressing surface 13 of the blow head 11 and the neck portion burr 7 is formed.
[0018]
Then, the blow head 11 stops at a predetermined position where the pressing surface 13 of the blow head 11 presses the upper surface of the flange portion 10a of the blow molding die 10 with the neck portion burr 7 interposed therebetween. by blowing air from the pores 16, a parison 20 portion that becomes the lower than the flange portion 10a, is blown into the bottle 1.
[0019]
The neck burr 7 formed integrally with the housing 1 is bent from the upper end of the mouth tube portion 4 of the housing 1 in a bent shape inwardly, then rises upward, and the connecting flange 7a is curved outward and reversed. This connecting flange 7a has an outer diameter sufficiently larger than the outer diameter of the mouth tube portion 4, and its upper surface has sufficient smoothness due to the pressing of the pressing surface 13 of the blow head 11. It has become a thing.
[0020]
The neck burr 7 formed integrally with the housing 1 is moved up and down at a cut position K at an outer diameter position equal to the outer diameter of the mouth tube portion 4 of the connecting flange 7a after the blow molding process of the housing 1 is completed. By cutting, the housing 1 is excised (see FIG. 4), but the inner portion of the connecting flange 7a remaining in the state of being connected to the upper end of the mouth tube portion 4 on the housing 1 side is the inverted flange as it is. 5 (see FIG. 5).
[0021]
The cutting process of the connecting flange 7a of the neck burr 7 is that the connecting flange 7a has an outer diameter larger than that of the mouth tube part 4, and that the outer peripheral groove 6 is formed directly below the connecting flange 7a. In the state in which the receiving plate is assembled to the outer peripheral groove 6, it is achieved with a cylindrical blade having a diameter equal to the outer diameter of the mouth tube portion 4 from above, thereby achieving safer, surely and accurately more easily. be able to.
[0022]
The reversing flange 5 is formed by reversing the upper end portion of the mouth tube portion 4 from the inside to the outside, so that the upper end portion of the inner layer 3 is located on the upper surface thereof. In a state where the cap 8 is screwed and assembled to the mouth tube portion 4, the upper end portion of the inner layer 3 is firmly sandwiched and fixed between the packing 9 of the cap 8 and the upper end portion of the outer layer 2, and the inner layer 3 in the mouth tube portion 4. As a result, a firm seal between the upper surface of the reversing flange 5 and the lower surface of the packing 9 is achieved by the sufficient smoothness of the upper surface of the inner layer 3 (see FIGS. 1 and 2). 2).
[0023]
When the upper end portion of the inner layer 3 is sandwiched between the cap 8 and the upper end portion of the outer layer 2, the outer peripheral groove 6 formed immediately below the reversing flange 5 functions to impart elasticity to the reversing flange 5. The immovable pinching is made stronger and more stable.
[0024]
【The invention's effect】
Since the present invention has the above-described configuration, the following effects can be obtained.
The upper surface of the reversing flange, which is the packing round of the housing, is given sufficient smoothness by pressing with the pressing surface of the blow head during molding, which can greatly improve the sealing performance between the cap packing. it can.
[Brief description of the drawings]
FIG. 1 is a right half longitudinal sectional view showing an embodiment of a housing according to the present invention in a state where a cap is assembled.
FIG. 2 is an enlarged vertical sectional view of a main part of the embodiment shown in FIG.
FIG. 3 is a partially enlarged view of a neck burr molding state showing an embodiment of the molding method of the present invention.
4 is a partially enlarged view of the embodiment shown in FIG.
FIG. 5 is a partially enlarged view of the embodiment shown in FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1; Housing 2; Outer layer 3; Inner layer 4; Mouth part 5; Inversion flange 6; Peripheral groove 7; Neck part burr 7a; Connecting flange 8; Cap 9; Packing 10; Blow mold 10a; Head 12; Small-diameter cylindrical portion 13; Pressing surface 14; Large-diameter cylindrical portion 15; Inclined guide surface 16; Air supply hole 20; Parison K;

Claims (2)

定形の外殻を形成する合成樹脂製の外層(2)と、該外層(2)に剥離自在に積層され、内袋を形成する可撓性合成樹脂製の内層(3)とから壜体(1)をブロー成形するに際して、段部下面を水平周状の平滑な押圧面(13)としたブローヘッド(11)を、パリソン(20)の上端開口部に、前記押圧面 (13) が、ブロー成形金型 (10) の口筒部 (4) 成形用型面部分の上端に内鍔状に設けられたフランジ部 (10a) に上方から対向する所定位置まで押込んで、キャップ(8)が螺合組付けされる円筒状の口筒部(4)の上端に、内方から外方に湾曲反転して、前記口筒部(4)の外径よりも充分に大きい外径の連結フランジ(7a)を有するネック部バリ(7)を一体に成形し、該ネック部バリ(7)を、前記壜体 (1) のブロー成形処理の完了後、前記連結フランジ(7a)の内側部分を反転フランジ(5)として前記口筒部(4)に残存させて切断除去する合成樹脂製壜体の成形方法。An outer layer (2) made of a synthetic resin that forms a fixed outer shell, and a flexible synthetic resin inner layer (3) that is peelably laminated on the outer layer (2) to form an inner bag ( 1) in blow molding, horizontal circumferential smooth pressing surface a stepped lower surface and the blow head (11) (13), the top opening of the parison (20), said pressing surface (13), mouth tube portion of the blow mold (10) (4) is I pushed from above the flange portion provided on the inner flange-like on the upper end of the mold surface portion (10a) to a predetermined position facing the cap (8) A connecting flange having an outer diameter that is sufficiently larger than the outer diameter of the mouth tube portion (4) at the upper end of the cylindrical mouth tube portion (4) to be screwed together. A neck part burr (7) having (7a) is integrally formed, and the neck part burr (7) is formed on the inner part of the connecting flange (7a) after the blow molding process of the casing (1) is completed. The mouth tube part (4) as a reversing flange (5) Method of molding a synthetic resin bottle body cleaved off is left. ブローヘッド(11)は、中心部に送気孔(16)が貫設されていると共に、パリソン(20)の内径と略同径の外径を有し、かつ外周面下端部に、下方へ縮径する傾斜ガイド面(15)を周設した小径筒部（12）の上端に、水平周状の平滑な押圧面(13)を介して拡径された大径筒部(14)を形成した、請求項１記載の合成樹脂製壜体の成形方法。The blow head (11) has an air supply hole (16) penetrating through the center, has an outer diameter that is substantially the same as the inner diameter of the parison (20), and contracts downward at the lower end of the outer peripheral surface. A large-diameter cylindrical portion (14) expanded in diameter via a horizontal circumferential smooth pressing surface (13) was formed at the upper end of a small-diameter cylindrical portion (12) provided with a diameter inclined guide surface (15). The method for forming a synthetic resin casing according to claim 1.
JP31479796A 1996-11-26 1996-11-26 Molding method of synthetic resin casing Expired - Lifetime JP3796594B2 (en)

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Application Number Priority Date Filing Date Title
JP31479796A JP3796594B2 (en) 1996-11-26 1996-11-26 Molding method of synthetic resin casing

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JP3796594B2 true JP3796594B2 (en) 2006-07-12

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Publication number Priority date Publication date Assignee Title
JP4593826B2 (en) * 2001-05-22 2010-12-08 株式会社Ｆｔｓ FUEL TANK OPENING STRUCTURE AND METHOD FOR PRODUCING FUEL TANK HAVING THE OPENING STRUCTURE
JP4593742B2 (en) * 2000-08-07 2010-12-08 株式会社Ｆｔｓ FUEL TANK OPENING STRUCTURE AND METHOD FOR PRODUCING FUEL TANK HAVING THE OPENING STRUCTURE
JP5020678B2 (en) * 2007-03-29 2012-09-05 株式会社吉野工業所 Lamination peeling preliminary container and method for producing lamination peeling container
CN114455165B (en) 2013-11-27 2024-06-07 京洛株式会社 Laminated peeling container
JP6780911B2 (en) * 2013-11-27 2020-11-04 キョーラク株式会社 Laminate peeling container

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