JP4962699B2 - Equipment for manufacturing double structure molded bodies - Google Patents

Equipment for manufacturing double structure molded bodies Download PDF

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JP4962699B2
JP4962699B2 JP2006001764A JP2006001764A JP4962699B2 JP 4962699 B2 JP4962699 B2 JP 4962699B2 JP 2006001764 A JP2006001764 A JP 2006001764A JP 2006001764 A JP2006001764 A JP 2006001764A JP 4962699 B2 JP4962699 B2 JP 4962699B2
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molded body
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interior
holding
double structure
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JP2007181862A (en
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真司 山田
具実 小林
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Toyo Seikan Kaisha Ltd
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Description

本発明は、保温性、保冷性、断熱性等が要求される二重構造容器等の二重構造成形体の製造装置に関する。 The present invention relates to an apparatus for producing a double structure molded body such as a double structure container that is required to have heat retention, cold insulation, heat insulation and the like.

容器の保温性、保冷性、断熱性を高めるために外装容器と内装容器で二重構造にした二重構造容器が、例えば飲料容器、金属缶、エアゾール缶、魔法瓶、マグカップ等で知られている。近年、飲料缶等の缶詰缶にもこのような二重構造缶が提案されている（特許文献１）。二重構造成形体において、その機能を高めるためには内装容器と外装容器との間の接触部ができるだけ少なく、両者の間は真空状態であることが望ましい。しかしながら、内装容器を外装容器に無接触状態で保持することは不可能であり、通常は開口端部で内装容器と外装容器を接合している。二重構造容器の接合方法として、まず外装容器の開口端部を内装容器の略外形寸法まで縮径加工し、該縮径加工した外装容器に内装容器を挿入して外装容器の縮径加工部に内装容器の開口端部を接触させて内装容器を保持するようにしている。ところが、外装容器と内装容器が共に有底容器であり、かつ、薄肉の場合、内装容器を挿入する際に外装容器内の空気が外部に逃げなければ外装容器が膨らむ、あるいは、内装容器が空気圧縮により変形するなど正常に挿入できないので、外装容器の縮径加工部を内装成形体の開口端部に密着状態できつく挿入することはできず、空気が逃げる隙間を有するように緩く嵌合する状態でしか挿入できない。そのため、開口端部の接触部のみで内装成形体を外装容器内に保持することは困難であり、その後のフランジ加工等の後加工が良好にできないので、通常開口端接触部で互いに接着剤で接着又は溶着するか、あるいは底部等に支持部品を設けて連結するかあるいは隙間に断熱材からなる詰物を挿入して、内装容器を外装容器内に支持している。
特開平３−２５４３２２号公報 A double-structured container made of a double structure of an outer container and an inner container in order to enhance the heat insulation, cold insulation and heat insulation of the container is known, for example, as a beverage container, a metal can, an aerosol can, a thermos bottle, a mug, etc. . In recent years, such a double structure can has been proposed for canned cans such as beverage cans (Patent Document 1). In the double structure molded body, in order to enhance its function, it is desirable that the number of contact portions between the inner container and the outer container is as small as possible, and a vacuum state is provided between the two. However, it is impossible to hold the inner container in a non-contact state with the outer container, and the inner container and the outer container are usually joined at the opening end. As a method for joining the double-structured container, first the diameter of the open end of the outer container is reduced to the approximate outer dimension of the inner container, and the inner container is inserted into the outer container that has been reduced in diameter to reduce the diameter of the outer container. The interior container is held by contacting the open end of the interior container. However, when both the outer container and the inner container are bottomed containers and are thin, the outer container is inflated if the air in the outer container does not escape to the outside when the inner container is inserted, or the inner container is air. Because it cannot be inserted normally due to deformation due to compression, the diameter-reduced portion of the outer container cannot be inserted tightly into the open end of the interior molded body, and it fits loosely with a gap through which air escapes. Can only be inserted in the state. For this reason, it is difficult to hold the interior molded body in the exterior container only by the contact portion of the opening end portion, and subsequent post-processing such as flange processing cannot be performed well. The inner container is supported in the outer container by bonding or welding, or by providing a support component on the bottom or the like, or by inserting a filling made of a heat insulating material into the gap.
JP-A-3-254322

しかし、その場合は製造工程が複雑になり、高速生産性を阻害させ、製造コストを高めることになる。また、固定部品等を用いると内装容器と外装容器との間に介在物が存在することになり、断熱性を損ない二重構造容器の利点を損なうばかりか、介在物を使用するのでそれだけ製造コストを増加させるという解決すべき問題点がある。
そこで、本発明は、外装容器と内装容器との間に接着材や固定用部品等を介在させることなく内装容器と外装容器の口部を精度よく且つ高速で接合することができる二重構造成形体の製造装置を提供することを目的とする。 However, in this case, the manufacturing process becomes complicated, which hinders high-speed productivity and increases manufacturing costs. In addition, if fixed parts are used, inclusions exist between the inner and outer containers, which not only impairs the heat insulation and impairs the advantages of the double-structured container, but also uses the inclusions, so that the manufacturing cost is much higher. There is a problem to be solved.
Therefore, the present invention provides a double structure molding that can accurately and quickly join the mouth of the outer container and the outer container without interposing an adhesive or a fixing part between the outer container and the inner container. An object is to provide a body manufacturing apparatus .

上記問題点を解決する本発明の二重構造成形体の製造装置は、内装成形体と外装成形体の間に隙間を有する二重構造成形体の製造装置であって、縮径加工のコア型を兼ね、内装成形体の口部に内嵌合する保持部材と、該保持部材の基端部から外方に段差状に延び少なくとも内装成形体の開口端面が衝合する衝合段差面と、該衝合段差面の外周端から軸方向に延び前記絞りダイの軸方向直線内周面が嵌合する絞りダイ案内面とからなる保持手段、該保持手段の外周部に該保持手段の外周面と所定間隔を有して配置された絞りダイとからなる接合ヘッドと、該接合ヘッドと対向して相対的に変位するように配置された外装成形体を保持する外装成形体保持体とからなり、前記保持手段及び接合ヘッドと、外装成形体保持体が対向して配置されおり、前記保持手段と前記接合ヘッドが相対的に上下することを特徴とするものである。請求項２に記載の発明は、請求項１に記載の二重構造成形体の製造装置において前記絞りダイは、前記保持手段と一体に軸方向に駆動可能であると共に、該保持手段に対して軸方向に駆動可能であることを特徴とするものである。 An apparatus for manufacturing a dual structure molded body of the present invention that solves the above problems is a manufacturing apparatus for a dual structure molded body having a gap between an interior molded body and an exterior molded body, and a core mold for diameter reduction processing A holding member that fits inside the mouth portion of the interior molded body, an abutting step surface that extends outwardly from the base end portion of the holding member and abuts at least the opening end surface of the interior molded body, Holding means comprising an aperture die guide surface extending in an axial direction from an outer peripheral end of the abutting step surface and fitted with an axially linear inner peripheral surface of the aperture die, and an outer peripheral surface of the holding means on an outer peripheral portion of the holding means And a joint head composed of a drawing die arranged at a predetermined interval, and an exterior molded body holder that holds the exterior molded body disposed so as to be relatively displaced facing the joint head. The holding means, the joining head, and the exterior molded body holder are arranged to face each other. It is characterized in that the holding means and the joining head is relatively vertically. The invention according to claim 2, wherein the aperture die apparatus for manufacturing a double structure molded article according to claim 1, together with a drivable axially integrally with the holding means for the holding means It can be driven in the axial direction.

本発明の二重構造成形体製造装置によれば、外装成形体内部に内装成形体を非接触の状態で挿入しながら、外装成形体の開口端部を縮径加工するので、外装成形体の開口端が絞りダイに衝合するまでは、内装成形体の嵌合に際して外装成形体内の空気が開口部から自由に抜け、空気圧縮を伴わないで容易に嵌合することができる。そして、外装成形体の開口端が絞りダイの成形面に衝合後は開口部は閉塞されるが、その状態での外装成形体の開口端の縮径量は僅かであるので、過大な空気圧縮を伴わないで開口端部の縮径加工が容易にでき、外装成形体と内装成形体の開口端部を圧接させて、縮径加工のみで内装成形体を外装成形体に保持可能に接合させることができる。しかも、外装成形体に内装成形体の挿入と同時に接合加工を行うことができるので、高速で精度よい組立ができる。そして、外装成形体と内装成形体の間に接着剤や固定部品を用いることなく外装成形体への位置決め固定できるので、二重構造成形体の本来の断熱機能を高め、且つ材料コストも低減させることができ、経済的である。 According to the dual structure molded body manufacturing apparatus of the present invention, the diameter of the opening end of the exterior molded body is reduced while the interior molded body is inserted into the exterior molded body in a non-contact state. Until the opening end abuts on the drawing die, the air inside the exterior molded body can freely escape from the opening when the interior molded body is fitted, and can easily be fitted without air compression. Then, after the opening end of the exterior molded body is brought into contact with the molding surface of the drawing die, the opening is closed, but since the amount of diameter reduction of the open end of the exterior molded body in that state is small, excessive air The diameter of the opening end can be easily reduced without compression, and the exterior molded product and the open end of the interior molded product are pressed together so that the interior molded product can be held on the exterior molded product only by the diameter reducing process. Can be made. Moreover, since the joining process can be performed simultaneously with the insertion of the interior molded body into the exterior molded body, high-speed and accurate assembly can be performed. And since it can be positioned and fixed to the exterior molded body without using an adhesive or a fixed part between the exterior molded body and the interior molded body, the original heat insulating function of the double structure molded body is enhanced and the material cost is also reduced. Can be economical.

そして、装置が内装成形体の保持手段と絞りダイ、外装成形体保持体とからなる単純な構造であり、且つ確実に効率よく二重構造成形体を製造することができ、高速生産が可能となる。また、該保持手段は外装成形体内へ内装成形体を位置決め搬送し、且つ外装成形体と内装成形体を嵌合させるためのコア型を兼ねるため、高速でも精度よい組立が可能である。また、単に接合ヘッドと外装成形体保持体とを相対的に互いに近づくように軸方向に変位させて縮径加工するのみで、外装成形体の開口端部を内装成形体の開口端部に圧接させることができ、且つ縮径加工された外装成形体と内装成形体の開口端部を自動的に揃えることができる。さらに、請求項２の構成によれば、外装成形体と内装成形体の開口端接触後、フランジ形成等後加工に必要な任意長さの開口端接合部を容易に形成できる。 And the apparatus has a simple structure consisting of a holding means for an interior molded body, a drawing die, and an exterior molded body holding body, and can reliably and efficiently produce a double structure molded body, enabling high-speed production. Become. In addition, since the holding means positions and conveys the interior molded body into the exterior molded body, and also serves as a core mold for fitting the exterior molded body and the interior molded body, assembly at high speed and high accuracy is possible. Moreover, the opening end of the exterior molded body is pressed against the open end of the interior molded body simply by displacing the joining head and the exterior molded body holding body in the axial direction so that they are relatively close to each other. In addition, it is possible to automatically align the opening end portions of the exterior molded body and the interior molded body that have been reduced in diameter. Furthermore, according to the structure of Claim 2 , the opening end junction part of arbitrary length required for post-processes, such as flange formation, can be easily formed after the opening end contact of an exterior molded object and an interior molded object.

以下、本発明の好適な実施形態を図面を基に詳細に説明する。
以下の実施形態では、図３に示すように有底の外装成形体２１に同じく有底の内装成形体２０を無接触状態で嵌合して、外装成形体と内装成形体の口部を互いに軸方向所定範囲にわたって接触させて開口端接触部２３を形成した二重構造缶を製造する場合を示しているが、本発明はそれに限るものではない。
図１は本実施形態に係る二重構造成形体製造装置による二重構造成形体の製造工程を示している。本実施形態に係る二重構造成形体の製造装置１は、内装成形体２０を保持し且つ外装成形体２１を縮径加工する接合ヘッド２と、該接合ヘッドと対向して外装成形体２１を保持する外装成形体保持体３とを有している。本実施形態では、接合ヘッド２が上下動して外装成形体保持体３に保持されている外装成形体２１に内装成形体２０を挿入するようにしているが、外装成形体保持体３を上下動させてもよく、あるいは両者を上下動させてもよく、さらに配置は上下方向に限らず横方向であってもよく、本実施形態に限定されるものではない。また、接合ヘッドと外装成形体保持体はターレット式の回転体に複数組配置しても良く、又は所定位置に配置されているものでもよい。 DESCRIPTION OF EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.
In the following embodiment, as shown in FIG. 3, the bottomed exterior molded body 21 is similarly fitted with the bottomed interior molded body 20 in a non-contact state, and the mouth of the exterior molded body and the interior molded body are connected to each other. Although the case where the double structure can in which the opening end contact portion 23 is formed by contacting over a predetermined range in the axial direction is shown, the present invention is not limited thereto.
FIG. 1 shows a manufacturing process of a double structure molded body by the dual structure molded body manufacturing apparatus according to this embodiment. The manufacturing apparatus 1 for a dual structure molded body according to the present embodiment includes a joining head 2 that holds the interior molded body 20 and reduces the diameter of the exterior molded body 21, and the exterior molded body 21 facing the joining head. It has the exterior molded body holding body 3 to hold. In the present embodiment, the joining head 2 moves up and down to insert the interior molded body 20 into the exterior molded body 21 held by the exterior molded body holder 3. It may be moved, or both may be moved up and down, and the arrangement is not limited to the vertical direction and may be the horizontal direction, and is not limited to this embodiment. Further, a plurality of sets of the joining head and the exterior molded body holding body may be arranged on a turret type rotating body, or may be arranged at a predetermined position.

接合ヘッド２は、図示しない駆動装置により駆動されて上下動するヘッド本体に、少なくとも内装成形体の開口端部を内側から保持する保持手段としてのコア型７と、該コア型の外周部に上下駆動可能に嵌合している絞りダイ８とを有している。コア型７は、本実施形態では、内装成形体の開口端部に嵌合して内装成形体２０を保持するリング状の保持部材９と、該保持部材９が嵌合するコア型本体１０とを有し、保持部材９をコア型本体１０を貫通する取付部材６により前記コア型本体１０に取り付け固定している。前記保持部材９は、本実施形態では内装成形体２０をバキュームによって吸引保持するように構成され、保持部材９の外周部に複数の吸引孔が形成され、該吸引孔はコア型本体を介して図示しない真空源に連通され、適宜真空と加圧の切り替え制御ができるようになっている。しかしながら、内装成形体の保持手段は、バキュームに限らず、保持部材９を電磁石で形成して磁力による保持、あるいは保持部材を割型(エキスパンダー型)で構成して摩擦力による保持、あるいは保持部材の密嵌合による摩擦力、さらには保持部材をエア等の流体で膨張する部材で構成して膨張による摩擦力での保持等、種々の手段が採用できる。また、コア型本体の軸方向中心部に下端まで貫通するバキューム孔を形成し、保持部材９に嵌合した内装成形体の内部からエアを排気して、バキュームによって内装成形体を保持するようにしてもよい。本実施形態では保持部材９をコア型本体と別部材で構成しているが、保持部材は必ずしもコア型本体７と別部材で構成しなくてコア型本体と一体に形成してもよい。そして、前記保持部材９は、絞りダイによる縮径加工時のバックアップ部を兼ね、外装成形体の縮径加工時に内装成形体の径方向の変形を防止し、絞りダイによる外装成形体の内装成形体への強い圧着加工を可能としている。   The joining head 2 is driven by a drive device (not shown) and is vertically moved to a head main body, a core die 7 as a holding means for holding at least an opening end portion of the interior molded body from the inside, and an outer peripheral portion of the core die. It has a diaphragm die 8 fitted so as to be drivable. In the present embodiment, the core mold 7 is fitted into the opening end of the interior molded body to hold the interior molded body 20, and the core mold body 10 to which the holding member 9 is fitted. The holding member 9 is attached and fixed to the core mold main body 10 by the mounting member 6 penetrating the core mold main body 10. In the present embodiment, the holding member 9 is configured to suck and hold the interior molded body 20 by vacuum, and a plurality of suction holes are formed in the outer peripheral portion of the holding member 9, and the suction holes are formed via the core mold body. It communicates with a vacuum source (not shown) so that switching between vacuum and pressurization can be appropriately performed. However, the holding means for the interior molded body is not limited to vacuum, and the holding member 9 is formed of an electromagnet and held by magnetic force, or the holding member is formed of a split mold (expander type) and held by frictional force, or the holding member Various means such as a frictional force due to the close fitting of each other, a holding member configured with a member that expands with a fluid such as air, and a holding with a frictional force due to expansion can be employed. In addition, a vacuum hole penetrating to the lower end is formed at the axial center of the core mold body, and air is exhausted from the interior molded body fitted to the holding member 9 so that the interior molded body is held by the vacuum. May be. In this embodiment, the holding member 9 is configured as a member separate from the core mold body, but the holding member may not be configured as a member separate from the core mold body 7 and may be formed integrally with the core mold body. The holding member 9 also serves as a backup portion at the time of diameter reduction processing by the drawing die, prevents deformation of the interior molded body in the radial direction at the time of diameter reduction processing of the exterior molding body, and interior molding of the exterior molding body by the drawing die. Enables strong crimping to the body.

本実施形態では、前記保持部材９の上端とコア型本体１０との間に外方に拡径して段差状に延びる段差面１１を有し、内装成形体を保持部材９に嵌合して装着する場合、内装成形体２０に開口端が段差面１１に突き当たることによって、軸方向に位置決めされ安定した姿勢で保持できる。そして、段差面１１の幅は内装成形体と外装成形体の板厚の合計厚さより僅かに大きく形成され、後述するように外装成形体２１に内装成形体２０を嵌合配置する際、縮径加工された外装成形体２１の開口端が前記衝合段差面１１に突き当たることによって、外装成形体と内装成形体の開口端部を接触と同時に揃えることを可能としている。コア型本体１０は衝合段差面の外周端から垂直に立ち上がり、その外周面が絞りダイ８が嵌合する絞りダイ案内面１２となっている。絞りダイ８は、外装成形体の開口端部を縮径加工する型面１６を有し、外装成形体の開口端が型面に衝合しながら変位することによって縮径加工が行われるようになっている。   In this embodiment, there is a step surface 11 extending outwardly between the upper end of the holding member 9 and the core mold body 10 and extending in a step shape, and the interior molded body is fitted to the holding member 9. In the case of mounting, the opening end of the interior molded body 20 abuts against the stepped surface 11, so that it can be positioned in the axial direction and held in a stable posture. And the width | variety of the level | step difference surface 11 is formed slightly larger than the total thickness of the board thickness of an interior molded object and an exterior molded object, and when the interior molded body 20 is fitted and arrange | positioned to the exterior molded body 21 so that it may mention later, a diameter reduction is carried out. Since the open end of the processed exterior molded body 21 abuts against the abutting step surface 11, the open end of the exterior molded body and the interior molded body can be aligned at the same time as contact. The core-type main body 10 rises vertically from the outer peripheral end of the abutting step surface, and the outer peripheral surface is a drawing die guide surface 12 to which the drawing die 8 is fitted. The drawing die 8 has a mold surface 16 for reducing the diameter of the opening end of the exterior molded body, and the diameter reduction processing is performed by displacing the open end of the exterior molded body while abutting against the mold surface. It has become.

以上のような装置によって、二重構造成形体を接合する工程を図１及び図２を参照しながら説明する。
内装成形体供給位置で、接合ヘッド２の上下動位置に内装成形体２０が供給され、接合ヘッドが相対的に上下動することによってコア型７の保持部材９が内装成形体内に嵌合して内装成形体の開口端部を内側から吸着して保持する。したがって、この状態で接合ヘッド２が移動することによって内装成形体も共に移動し、内装成形体を外装成形体供給位置の上方まで移動させることができる。外装成形体供給位置には外装成形体保持体３に載置された外装成形体２１が同心軸上に待機している(図１(ａ)の状態)。この状態から接合ヘッド２が下降することによって、次第に内装成形体２０が外装成形体２１内に嵌合する。この状態では、外装成形体２１の端部は開口しているので、内装成形体２０が嵌合しても外装成形体内の空気は開口部から自由に抜け、容易に嵌合できる。そして、外装成形体２１の開口端２５が絞りダイ８の型面１６に衝合し図２(ａ)の状態となる。その状態からさらに絞りダイ８と保持部材９が共に下降するにつれて外装成形体の上端が型面に沿って次第に変位して縮径加工が行われる。絞りダイ８と保持部材９がさらに下降することによって、外装成形体の開口端２５がコア型本体の段差面１１に衝合し、図２(ｂ)に示すように、ちょうど外装成形体の開口端２５と内装成形体の開口端２４が揃った状態で外装成形体の開口端と内装成形体の開口端が接触する。したがって、本実施形態の方法によれば開口端接触部形成後の後処理としてのトリミング工程を省くことができる。図２(ｂ)の状態から、絞りダイ８のみが所定ストローク下降することによって、同図(ｃ)に示すように、開口端に所定長さＡの開口端接合部２６を形成することができる。それにより、図３(ａ)に示すように、開口端接触部以外は外装成形体と内装成形体が非接触である二重構造成形体３０を得ることができる。そして、その状態で同図(ｂ)に示すように、開口端接触部２３にフランジ２７を形成するなどの後加工ができる。 With reference to FIGS. 1 and 2, the process of joining the double structure molded body using the apparatus as described above will be described.
At the interior molded body supply position, the interior molded body 20 is supplied to the vertically moving position of the joining head 2, and the joining head moves relatively up and down, so that the holding member 9 of the core mold 7 is fitted into the interior molded body. The opening end of the interior molded body is adsorbed and held from the inside. Accordingly, when the joining head 2 moves in this state, the interior molded body also moves together, and the interior molded body can be moved to above the exterior molded body supply position. At the exterior molded body supply position, the exterior molded body 21 placed on the exterior molded body holding body 3 stands by on the concentric shaft (state shown in FIG. 1A). By lowering the joining head 2 from this state, the interior molded body 20 is gradually fitted into the exterior molded body 21. In this state, since the end of the exterior molded body 21 is open, even if the interior molded body 20 is fitted, the air in the exterior molded body can be freely released from the opening and can be easily fitted. Then, the open end 25 of the outer molded body 21 abuts on the mold surface 16 of the drawing die 8 and the state shown in FIG. As the drawing die 8 and the holding member 9 are further lowered from this state, the upper end of the outer molded body is gradually displaced along the mold surface, and diameter reduction processing is performed. As the squeezing die 8 and the holding member 9 are further lowered, the opening end 25 of the outer molded body abuts on the step surface 11 of the core mold body, and as shown in FIG. With the end 25 and the opening end 24 of the interior molded body aligned, the opening end of the exterior molded body and the opening end of the interior molded body are in contact. Therefore, according to the method of the present embodiment, a trimming step as post-processing after the opening end contact portion is formed can be omitted. From the state of FIG. 2B, only the aperture die 8 is lowered by a predetermined stroke, whereby an opening end joint portion 26 having a predetermined length A can be formed at the opening end as shown in FIG. . Thereby, as shown to Fig.3 (a), the double structure molded object 30 with which an exterior molded object and an interior molded object are non-contact other than an opening end contact part can be obtained. In this state, as shown in FIG. 5B, post-processing such as forming a flange 27 on the opening end contact portion 23 can be performed.

本実施形態によれば、外装成形体２１の開口端２５が絞りダイに衝合するまでは、内装成形体の嵌合に際して外装成形体内の空気が開口部から自由に抜けるので、容易に嵌合することができ、外装成形体２１の開口端２５が絞りダイに衝合後は外装成形体と内装成形体の隙間上端は閉鎖されるが、縮径量は僅かであるので、開口端部の縮径加工が容易にでき、図２(ｃ)に示すように外装成形体の開口端部を所定長さの範囲にわたって内装成形体２０の開口端部に圧接させることが可能となり、縮径加工のみで内装成形体２０を外装成形体２１に保持させることが可能な接合加工ができる。しかも、外装成形体２１に内装成形体２０の挿入と同時に行うことができるので、高速で精度よい組立ができる。そして、外装成形体と内装成形体の間に接着剤や固定部品を用いることなく外装成形体への位置決め固定できるので、二重構造成形体の本来の機能を高め、且つ材料コストも低減させることができ、経済的である。   According to the present embodiment, until the opening end 25 of the exterior molded body 21 abuts with the drawing die, the air in the exterior molded body freely escapes from the opening when the interior molded body is fitted. After the opening end 25 of the exterior molded body 21 is brought into contact with the drawing die, the upper end of the gap between the exterior molded body and the interior molded body is closed, but since the amount of diameter reduction is slight, The diameter reduction can be easily performed, and as shown in FIG. 2 (c), the opening end of the exterior molded body can be brought into pressure contact with the opening end of the interior molded body 20 over a predetermined length range. The joining process which can hold | maintain the interior molded body 20 in the exterior molded body 21 only by it can be performed. And since it can carry out simultaneously with insertion of the interior molding 20 in the exterior molding 21, it can assemble at high speed and with high precision. And since it can be positioned and fixed to the exterior molded body without using an adhesive or a fixed part between the exterior molded body and the interior molded body, the original function of the dual structure molded body can be improved and the material cost can be reduced. Can be economical.

図４は、本発明に係る二重構造成形体の製造装置の他の実施形態を示している。本実施形態に係る二重構造成形体の製造装置４０は、基本的な構成は前記実施形態の装置と同様であり、図４は図１(ｂ)に相当する工程における要部断面図を示し、前記実施形態と同様な部分については、同一符号を付し相違している部分のみについて説明する。
本実施形態では、接合ヘッド２の接合ヘッド本体５に取付ボルト４１により、取付ジグ４２を介してコア型７が上下変位可能に取り付けられている。コア型７は前記実施形態と同様にコア型本体１０と保持部材９とから形成され、コア型本体１０の上端面４３と取付ジグ４２に設けられたバネ係合面との間に圧縮スプリング４５が嵌装され、コア型７を常に図４において下方に付勢している。また、ヘッド本体５には、絞りダイ８と、該絞りダイの外周部に嵌合して絞りダイを保持すると共に下方部が絞り成形する外装成形体２１の絞りダイへの案内面４６となっている管状外装体４７が取り付けられている。 FIG. 4 shows another embodiment of the apparatus for producing a dual structure molded body according to the present invention. The dual structure molded body manufacturing apparatus 40 according to this embodiment has the same basic configuration as the apparatus of the above embodiment, and FIG. 4 is a cross-sectional view of the main part in the process corresponding to FIG. The same parts as those in the above embodiment are given the same reference numerals and only the different parts will be described.
In the present embodiment, the core die 7 is attached to the joining head main body 5 of the joining head 2 by the attachment bolt 41 via the attachment jig 42 so as to be vertically displaced. The core mold 7 is formed of the core mold body 10 and the holding member 9 as in the above-described embodiment, and the compression spring 45 is interposed between the upper end surface 43 of the core mold body 10 and the spring engaging surface provided on the mounting jig 42. Is fitted, and the core mold 7 is always urged downward in FIG. The head body 5 has a drawing die 8 and a guide surface 46 to the drawing die of the outer molded body 21 which is fitted to the outer peripheral portion of the drawing die and holds the drawing die and the lower part is drawn. A tubular exterior body 47 is attached.

本実施形態の二重構造成形体の製造装置は、以上の構成を有することにより、外装成形体内部に内装成形体２０を非接触の状態で挿入しながら、外装成形体２１の開口端部を縮径加工して内装成形体２０の開口端部に接触させるまでは、接合ヘッド２は一体に変位し、端部が揃ってさらに絞りダイ８が下降して外装成形体を絞り成形して接触部を形成する際には、コア型７は外装成形体の開口端部と係合している状態にあるので、ヘッド本体の下降に伴って外装成形体から反力を受け、それに相当する分だけ圧縮スプリング４５がクッションする。したがって、コア型７は一定位置に止まり、絞りダイ８と管状外装体４７のみが下降して、開口端接合部を形成する縮径加工が行われる。したがって、この実施形態の場合、圧縮スプリングは外装成形体の座屈荷重よりも低い負荷でクッションするようなバネ係数を有するスプリングを選択する必要がある。   The manufacturing apparatus of the double structure molded body of the present embodiment has the above-described configuration so that the opening end portion of the exterior molded body 21 is inserted into the exterior molded body while the interior molded body 20 is inserted in a non-contact state. The joint head 2 is displaced integrally until the diameter is reduced and brought into contact with the opening end of the interior molded body 20, the ends are aligned, and the drawing die 8 is further lowered to draw and contact the exterior molded body. When the portion is formed, the core die 7 is engaged with the open end of the exterior molded body, and therefore receives a reaction force from the exterior molded body as the head body is lowered, Only the compression spring 45 cushions. Accordingly, the core die 7 remains in a fixed position, and only the drawing die 8 and the tubular outer body 47 are lowered, and the diameter reducing process for forming the opening end joint portion is performed. Therefore, in this embodiment, it is necessary to select a spring having a spring coefficient that cushions the compression spring with a load lower than the buckling load of the exterior molded body.

以上、本発明の好適な実施形態について説明したが、本発明は上記実施形態に限るものでなく、種々の設計変更が可能である。例えば、上記実施形態では、コア型本体１０に衝合段差面１１を設けて該衝合段差面に外装成形体及び内装成形体の開口端が衝合するようにしたが、図５に示すように、必ずしも外装成形体の開口端部は衝合段差面に衝合させなくてもよい。この場合、外装成形体と内装成形体の開口端は不揃い状態になる場合もあるが、開口端接触部に後加工としてフランジやカール加工するのに支障のない範囲内であれば問題がない。
また、本発明の二重構造成形体の製造装置によれば、外装成形体と内装成形体の隙間部に生じる空気の圧縮量は極わずかであるが、加温された内容品を充填したり温水や加熱蒸気等で容器を洗浄殺菌する際など、温度条件によっては隙間部の空気が大きく膨張し容器を変形させる場合がある。そこで、必要に応じて接合時に真空処理等を併用し隙間部の空気圧縮をより抑える対策を行ってもよい。実施の形態としては、接合ヘッド２と外装成形保持体３から成る装置を減圧されたチャンバー内に設けて成形を行っても良いし、コア型本体１０の絞りダイ８との案内面側に複数のバキューム溝を設けておくことにより、外装成形体開口端２５が絞りダイ８の型面１６に衝合したときから隙間部のみを効率的に減圧させても良い。また、内装成形体挿入の際に外装成形体を高周波加熱等により加熱したり、温風を吹き入れたりなどして外装成形体内部の空気を加温しておけば、接合後、隙間部は室温にて減圧化される。
本発明の二重構造成形体の製造装置は、有底容器だけに限らず、シーム管、シームレス管、角管、テーパ管など各種成形体の接合においても優れた効果を発揮する。その場合、接着や溶着、隙間に詰め物等の部品を介すことなく高速で精度の良い組立が可能になる。 Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made. For example, in the above embodiment, the abutting step surface 11 is provided on the core mold body 10, and the opening end of the exterior molded body and the interior molded body abuts on the abutting step surface. In addition, the opening end of the exterior molded body does not necessarily have to abut against the abutting step surface. In this case, the opening ends of the exterior molded body and the interior molded body may be in an uneven state, but there is no problem as long as the opening end contact portion is within a range that does not hinder flange or curling as post-processing.
In addition, according to the apparatus for manufacturing a dual structure molded body of the present invention, the compressed amount of air generated in the gap between the exterior molded body and the interior molded body is very small, but the heated contents are filled. Depending on the temperature conditions, when the container is washed and sterilized with warm water, heated steam, or the like, the air in the gap may be greatly expanded to deform the container. Therefore, if necessary, a countermeasure may be taken to further suppress air compression in the gap by using a vacuum treatment or the like at the time of joining. As an embodiment, molding may be performed by providing an apparatus including the joining head 2 and the exterior molding holding body 3 in a decompressed chamber, or a plurality of devices may be provided on the guide surface side of the core die body 10 with the drawing die 8. By providing the vacuum groove, only the gap portion may be efficiently decompressed after the exterior molded body opening end 25 abuts against the mold surface 16 of the drawing die 8. In addition, when the interior molded body is inserted, the exterior molded body is heated by high-frequency heating or the like, or the inside of the exterior molded body is heated by blowing warm air or the like. Depressurized at room temperature.
The apparatus for producing a double structure molded body of the present invention is not limited to a bottomed container, but also exhibits excellent effects in joining various molded bodies such as a seam pipe, a seamless pipe, a square pipe, and a tapered pipe. In that case, high-speed and high-precision assembly is possible without using adhesives, welding, and other parts such as padding in the gap.

本発明は、外装成形体と内装成形体を有する二重構造成形体としての飲料容器、種々の缶、美術缶、エアゾール缶、魔法瓶、マグカップ等種々の容器の製造に好適に利用できる。これらの二重構造成形体は金属製に限らず、プラスチック製、紙製、及びそれらの複合材料製にも適用できる。   INDUSTRIAL APPLICATION This invention can be utilized suitably for manufacture of various containers, such as a drink container as a double structure molded object which has an exterior molded object and an interior molded object, various cans, an art can, an aerosol can, a thermos bottle, a mug. These double structure molded products are not limited to metal, but can be applied to plastic, paper, and composite materials thereof.

本発明の実施形態に係る二重構造成形体の製造装置の製造工程順の概略正面断面図を示している。The schematic front sectional drawing of the order of the manufacturing process of the manufacturing apparatus of the double structure molded object which concerns on embodiment of this invention is shown. その縮径加工状態を工程順に示す要部拡大断面図である。It is a principal part expanded sectional view which shows the diameter reduction process state in order of a process. (ａ)は本発明の装置により得られた一例の二重構造成形体の断面図であり、(ｂ)はそれの開口端接触部にフランジ加工を施した二重構造成形体の断面図である。(a) is a cross-sectional view of an example double structure molded body obtained by the apparatus of the present invention, (b) is a cross-sectional view of a double structure molded body in which the opening end contact portion is flanged. is there. 本発明の他の実施形態に係る二重構造成形体の製造装置の概略正面断面図を示している。The schematic front sectional drawing of the manufacturing apparatus of the double structure molded object which concerns on other embodiment of this invention is shown. 本発明の他の実施形態に係る二重構造成形体の縮径加工状態を工程順に示す要部拡大断面図である。It is a principal part expanded sectional view which shows the diameter reduction process state of the double structure molded object which concerns on other embodiment of this invention in order of a process.

符号の説明Explanation of symbols

１、４０ 二重構造成形体の製造装置 ２ 接合ヘッド
３ 外装成形体保持体 ６ コア取付部材
７ コア型 ８ 絞りダイ
９ 保持部材 １０ コア型本体
１１ 衝合段差面 １２ 絞りダイ案内面
１６ 型面 ２０ 内装成形体
２１ 外装成形体 ２３ 開口端接触部
２４ 内装成形体の開口端 ２５ 外装成形体の開口端
２７ フランジ ３０ 二重構造成形体
４１ 取付ボルト ４２ 取付ジグ
４３ 上端面 ４５ スプリング
４６ 案内面 ４７ 管状外装体 DESCRIPTION OF SYMBOLS 1, 40 Manufacturing apparatus of double structure molded body 2 Joining head 3 Exterior molded body holder 6 Core mounting member 7 Core mold 8 Drawing die 9 Holding member 10 Core mold body 11 Colliding step surface 12 Drawing die guide surface 16 Mold surface DESCRIPTION OF SYMBOLS 20 Interior molded body 21 Exterior molded body 23 Open end contact part 24 Open end of interior molded body 25 Open end 27 of exterior molded body 27 Flange 30 Dual structure molded body 41 Mounting bolt 42 Mounting jig 43 Upper end surface 45 Spring 46 Guide surface 47 Tubular exterior

Claims (2)

内装成形体と外装成形体の間に隙間を有する二重構造成形体の製造装置であって、縮径加工のコア型を兼ね、内装成形体の口部に内嵌合する保持部材と、該保持部材の基端部から外方に段差状に延び少なくとも内装成形体の開口端面が衝合する衝合段差面と、該衝合段差面の外周端から軸方向に延び前記絞りダイの軸方向直線内周面が嵌合する絞りダイ案内面とからなる保持手段、該保持手段の外周部に該保持手段の外周面と所定間隔を有して配置された絞りダイとからなる接合ヘッドと、該接合ヘッドと対向して相対的に変位するように配置された外装成形体を保持する外装成形体保持体とからなり、前記保持手段及び接合ヘッドと、外装成形体保持体が対向して配置されおり、前記保持手段と前記接合ヘッドが相対的に上下することを特徴とする二重構造成形体の製造装置。   An apparatus for manufacturing a double structure molded body having a gap between an interior molded body and an exterior molded body, which also serves as a core mold for diameter reduction processing, and a holding member that fits inside a mouth portion of the interior molded body, An abutting step surface extending outwardly from the base end portion of the holding member and abutting at least an opening end surface of the interior molded body, and an axial direction of the aperture die extending from the outer peripheral end of the abutting step surface A holding head composed of a drawing die guide surface to which a linear inner circumferential surface is fitted, a joining head comprising a drawing die arranged at a predetermined distance from the outer circumferential surface of the holding means on the outer peripheral portion of the holding means; An exterior molded body holding body that holds an exterior molded body that is disposed so as to be relatively displaced facing the joining head, and the holding means, the joining head, and the exterior molded body holding body are disposed to face each other. The holding means and the joining head move up and down relatively. Apparatus for manufacturing a double structure formed body to. 前記絞りダイは、前記保持手段と一体に軸方向に駆動可能であると共に、該保持手段に対して軸方向に駆動可能である請求項１に記載の二重構造成形体の製造装置。 2. The apparatus for manufacturing a double structure molded body according to claim 1 , wherein the aperture die can be driven in the axial direction integrally with the holding means, and can be driven in the axial direction with respect to the holding means.
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