JPH08198256A - Synthetic resin container in double structure, and its manufacture - Google Patents
Synthetic resin container in double structure, and its manufactureInfo
- Publication number
- JPH08198256A JPH08198256A JP2620895A JP2620895A JPH08198256A JP H08198256 A JPH08198256 A JP H08198256A JP 2620895 A JP2620895 A JP 2620895A JP 2620895 A JP2620895 A JP 2620895A JP H08198256 A JPH08198256 A JP H08198256A
- Authority
- JP
- Japan
- Prior art keywords
- container
- mold
- outer container
- parison
- synthetic resin
- 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.)
- Granted
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、主として外形が広口瓶
形状をした合成樹脂製の二重構造容器及びその製造方法
に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention mainly relates to a synthetic resin double structure container having an outer shape of a wide-mouthed bottle and a method for manufacturing the same.
【０００２】[0002]
【従来の技術】従来、化粧品、その他の入れ物として、
広口瓶が使用されているが、従来のガラス製に代り、近
年は合成樹脂製の広口瓶が使用されつつある。2. Description of the Related Art Conventionally, as cosmetics and other containers,
Wide-mouthed bottles are used, but in recent years, synthetic resin-made wide-mouthed bottles are being used instead of conventional glass-made bottles.
【０００３】一般に合成樹脂容器の成形方法は、円筒状
にパリソンを押し出し、これを半割の金型内に挿入し、
空気を吹き込んでパリソンを金型形状に膨らませた後、
冷却固化させるブロー成形法と、金型の中空内部に溶融
合成樹脂を注入させる射出成形法とがあるが、ブロー成
形法による広口瓶形状容器は内面が金型によって仕上げ
られないため、肉厚を一定に成形することができず、し
かも内面に凹凸が生じ、内容量も一定にならない。この
ため、従来は内面の平滑仕上げや、内容量を一定にする
必要がある合成樹脂容器の成形は射出成形によらざるを
得なかった。Generally, in the method of molding a synthetic resin container, a parison is extruded into a cylindrical shape, and this is inserted into a half mold,
After blowing air to inflate the parison into the mold shape,
There are a blow molding method of cooling and solidification and an injection molding method of injecting a molten synthetic resin into the hollow inside of the mold.However, since the inner surface of the wide-mouthed bottle-shaped container by the blow molding method cannot be finished by the mold, the wall thickness is It cannot be molded uniformly, and unevenness occurs on the inner surface, so that the inner volume is not constant. For this reason, conventionally, the molding of a synthetic resin container, which requires a smooth finish on the inner surface and a constant inner volume, must be done by injection molding.
【０００４】一方、射出成形の場合には、開口部より内
部が広い形状の広口瓶を同時に一体成形することができ
ず、このため、図４（イ）に示すように上部２１と底蓋
２２とに分割成形したり、同図（ロ）に示すように内容
器２３と外容器２４とを分割成形し、これらを組み合わ
せて１つの広口瓶形状をした二重構造容器として成形し
ていた。On the other hand, in the case of injection molding, it is not possible to integrally mold a wide-mouthed bottle having a wider inside than the opening, and therefore, as shown in FIG. In addition, the inner container 23 and the outer container 24 were separately molded as shown in FIG. 6B, and these were combined to form a single wide-mouthed bottle-shaped double-structured container.
【０００５】[0005]
【発明が解決しようとする課題】上述の如き従来の広口
瓶形状の二重容器は、複数部分をいずれも射出成形によ
り製造しているため、その成形型の製造が高額になり、
しかも内容量の異なったもの毎に各々の金型が必要にな
り、コスト高とならざるを得ないという問題があった。Since the conventional wide-mouth bottle-shaped double container as described above is manufactured by injection molding of a plurality of parts, the mold is expensive to manufacture.
Moreover, there is a problem in that each die needs different molds for different contents, which inevitably leads to high cost.
【０００６】本発明はこのような従来の問題にかんが
み、多種類の内容量のものでも低コストで製造すること
のできる合成樹脂製二重構造容器及びその製造方法の提
供を目的としてなされたものである。In view of the above conventional problems, the present invention has been made for the purpose of providing a synthetic resin double structure container capable of manufacturing various kinds of contents having a low cost and a manufacturing method thereof. Is.
【０００７】[0007]
【課題を達成するための手段】上述の如き従来の問題を
解決し、所期の目的を達成するための本発明の特徴とす
るところは、第一に、ブロー成形された広口瓶形状の外
容器と、該外容器の開口部より内方に挿入され、該外容
器の外口縁部に当接するフランジを開口部に有する射出
成形された内容器とからなる合成樹脂製二重構造容器に
あり、第二に、ブロー成形機のリング状ノズルより筒状
に垂下させたパリソンを半割金型内にホールドし、該金
型の開口部上にてパリソンを切断した後、該金型内のパ
リソン内に該金型によって成形される容器の底部に達す
る長さの打込ピンを挿入し、該パリソン内に空気を圧入
して広口瓶形状に膨脹させるとともに、該容器の底部を
打込ピンの下端にて金型底部側に押圧させて外容器を成
形し、射出成形機によって別に成形した内容器を前記外
容器内に嵌合させることを特徴としてなる合成樹脂製二
重構造容器の製造方法にある。尚、外容器の底壁上面に
凹部を設け、該凹部内に内容器の底壁下面に一体成形し
た凸部を嵌合させることによって安定の良いものとな
る。The features of the present invention for solving the above-mentioned conventional problems and for achieving the intended purpose are as follows. A double-structured synthetic resin container comprising a container and an injection-molded inner container that is inserted inward from the opening of the outer container and has a flange that abuts the outer edge of the outer container at the opening. Secondly, the parison hung from the ring-shaped nozzle of the blow molding machine in a cylindrical shape is held in the mold half, and the parison is cut on the opening of the mold, and then the inside of the mold is cut. Insert a driving pin of a length that reaches the bottom of the container molded by the mold into the parison, and inject air into the parison to expand it into a wide-mouth bottle shape and drive the bottom of the container. Press the bottom of the pin toward the bottom of the mold to mold the outer container, then use an injection molding machine. Accordingly in the production method of the synthetic resin double structure container it made be characterized by fitting the separately molded inner container into the outer container. By providing a concave portion on the upper surface of the bottom wall of the outer container and fitting a convex portion integrally formed on the lower surface of the bottom wall of the inner container into the concave portion, stability is improved.
【０００８】[0008]
【作用】本発明においては、ブロー成形された外容器の
内面に凹凸があったり、肉厚のばらつきによる内容量の
ばらつきがあっても内容器が射出成形であるため、収容
部分の内面を平滑にでき、内容量も正確なものとするこ
とができる。また内容量を違えた多種類のものの製造
は、内容器の深さ及びその底面の凸部を違えたものを多
種類製造することによって共通の外容器が使用できる。
更に、内容器の凸部と外容器の凹部を嵌合させることに
より、内外容器の結合が安定化する。According to the present invention, even if the inner surface of the blow-molded outer container has irregularities or the inner volume varies due to the variation in the wall thickness, the inner container is injection-molded, so that the inner surface of the receiving portion is smoothed. It is also possible to make the internal volume accurate. Further, in the manufacture of many kinds having different contents, a common outer container can be used by manufacturing many kinds having different depths of the inner container and convex portions on the bottom surface.
Further, by fitting the convex portion of the inner container and the concave portion of the outer container, the coupling between the inner and outer containers is stabilized.
【０００９】また、特に本発明による製造方法において
は、外容器の成形に際し、打込ピンをパリソン内に挿入
した金型底面に押し当てることにより、成形される外容
器の底壁の内面が打込ピンによって急速冷却されるた
め、脱型後の底壁の外方（下側）への膨出がなくなり、
深さが一定に成形される。Further, particularly in the manufacturing method according to the present invention, when the outer container is molded, the driving pin is pressed against the bottom surface of the mold inserted in the parison, whereby the inner surface of the bottom wall of the outer container to be molded is driven. Since it is cooled rapidly by the insert pin, the bottom wall does not bulge outward (lower side) after demolding.
Molded to a constant depth.
【００１０】また、そのため、底壁を予め内方（上側）
に湾曲させる量が少くなり、平な底壁の容器が製造され
る。For this reason, the bottom wall is preliminarily inward (upper).
A flat bottom wall container is produced with less bending to the side.
【００１１】[0011]
【実施例】次に本発明の実施例を図１〜図３について説
明する。EXAMPLE An example of the present invention will be described with reference to FIGS.
【００１２】図１は本発明に係る容器の一例を示したも
のであり、図において、１は外容器、２は内容器であ
る。外容器１は本体部の上端に胴部１ａより小径の首部
３があり、その首部３の外面に雄ねじ４が成形されてい
る。また外容器１の底壁１ｂの内面には円形の凹部５が
成形されている。FIG. 1 shows an example of a container according to the present invention, in which 1 is an outer container and 2 is an inner container. The outer container 1 has a neck portion 3 having a smaller diameter than the body portion 1a at the upper end of the body portion, and a male screw 4 is formed on the outer surface of the neck portion 3. A circular recess 5 is formed on the inner surface of the bottom wall 1b of the outer container 1.
【００１３】内容器２は、均一な円筒状をした胴部２ａ
の開口部外周縁にフランジ６が一体成形されており、そ
のフランジ６が外容器１の開口縁部（首部３の頂面）に
当接されている。また底壁２ｂの下面には小円筒状の凸
部７が一体成形され、その凸部７が外容器底壁１ｂ内面
の凹部５内に嵌合されている。The inner container 2 is a body portion 2a having a uniform cylindrical shape.
The flange 6 is integrally formed on the outer peripheral edge of the opening of the outer container 1. The flange 6 is in contact with the opening edge of the outer container 1 (the top surface of the neck 3). A small cylindrical convex portion 7 is integrally formed on the lower surface of the bottom wall 2b, and the convex portion 7 is fitted in the concave portion 5 on the inner surface of the outer container bottom wall 1b.
【００１４】両容器１，２は、外容器１の首部３の内面
及び頂面に対し、内容器２の胴部上端外周及びフランジ
６の下面が接着剤によって接着されることにより一体化
されている。The two containers 1 and 2 are integrated by adhering the outer periphery of the upper end of the body of the inner container 2 and the lower surface of the flange 6 to the inner and top surfaces of the neck 3 of the outer container 1 with an adhesive. There is.
【００１５】このように構成される容器の製造は、外容
器１と内容器２とを別々に成形して組み合わせるもので
あり、内容器２の製造は、図２に示す如き金型１０，１
１を使用し、その中に溶融状態にある熱可塑性の合成樹
脂を注入する、所謂射出成形法によって成形する。The container thus constructed is manufactured by separately molding and combining the outer container 1 and the inner container 2. The inner container 2 is manufactured by the molds 10, 1 shown in FIG.
1 is used, and a thermoplastic synthetic resin in a molten state is injected thereinto, which is so-called injection molding.
【００１６】一方、外容器１の成形は、所謂ブロー成形
法によって行う。この方法は、図３（イ）に示すよう
に、溶融状態にある熱可塑性樹脂をリング状のノズル１
２から円筒形のパリソン１３として押し出し、一定長さ
まで押し出された後、図３（ロ）に示すように左右の半
割状の金型１４，１５を閉じ、両金型底部にて、パリソ
ン１３の下端を挾むとともに、ホットカッター１６をも
って、金型上端部にてパリソン１３を切断する。このよ
うにして切断されたパリソン１３を内部に把み込んだ金
型１４，１５を閉じた状態のまま打込ピン下まで横移動
させる。次いで図３（ハ）に示すように打込ピン１７を
降下させて金型開口部よりパリソン１３の上端開口部に
挿入する。この打込ピン１７は、パリソン１３内に、空
気を圧入して膨脹させるためのエア流路１８が形成され
ているとともに、上部には、成形される容器１の首部の
内面を成形するための開口部内面成形部１９を有し、か
つ、下端側に、成形される容器１の底壁を内面から押さ
える底壁押圧用凸部２０が一体に成形されている。On the other hand, the outer container 1 is molded by a so-called blow molding method. In this method, as shown in FIG. 3A, a thermoplastic resin in a molten state is formed into a ring-shaped nozzle 1.
After being extruded as a cylindrical parison 13 from 2 to a certain length, the left and right mold halves 14 and 15 are closed as shown in FIG. While holding the lower end of the parison, the hot cutter 16 is used to cut the parison 13 at the upper end of the mold. The dies 14 and 15 holding the parison 13 cut in this way inside are laterally moved to below the driving pin with the molds 14 and 15 kept closed. Next, as shown in FIG. 3C, the driving pin 17 is lowered and inserted into the upper end opening of the parison 13 from the mold opening. The driving pin 17 has an air passage 18 for pressurizing and expanding air in the parison 13 and has an upper portion for molding the inner surface of the neck portion of the container 1 to be molded. A bottom wall pressing convex portion 20 that has an opening inner surface molding portion 19 and that presses the bottom wall of the container 1 to be molded from the inner surface is integrally molded on the lower end side.
【００１７】この打込ピン１７をエア流路１８からエア
を吹き出しつつパリソン１３内に挿入し、容器１の首部
内面を平滑に成形すると同時に、エアによってパリソン
１３を膨らませて金型１４，１５の内面形状に外形を成
形する。そして、図３（ニ）に示すように打込ピン１７
の最降下位置で、その下端の凸部２０によって容器１の
底壁上面を押圧し、凹部５を成形することによって底壁
１ｂが凸部２０と金型１４，１５とに挾まれた状態で内
外両面から冷却されることとなり、脱型後の底壁１ｂの
変形がほとんどないものとなる。The hammering pin 17 is inserted into the parison 13 while blowing air from the air flow path 18 to shape the inner surface of the neck of the container 1 to be smooth, and at the same time, the parison 13 is inflated by the air so that the molds 14 and 15 are formed. The outer shape is formed into the inner surface shape. Then, as shown in FIG.
When the bottom wall 1b is sandwiched between the convex portion 20 and the molds 14 and 15 by pressing the upper surface of the bottom wall of the container 1 by the convex portion 20 at the lower end of the container 1 and molding the concave portion 5, Since it is cooled from both the inner and outer surfaces, the bottom wall 1b is hardly deformed after demolding.
【００１８】このようにして外容器１を成形後、打込ピ
ン１７を上昇させつつ金型１４，１５を開くことによ
り、成形された外容器１がエア流路１８から吹き出すエ
アによって下方に吹き落とされる。After molding the outer container 1 in this manner, the molds 14 and 15 are opened while raising the driving pin 17 so that the molded outer container 1 is blown downward by the air blown out from the air flow path 18. Be dropped.
【００１９】[0019]
【発明の効果】上述したように本発明の合成樹脂製二重
構造容器は、外容器を広口瓶形状としてブロー成形によ
って成形し、その開口部より内容器を挿入して開口部に
て結合させるようにしたことにより、下部が膨らみ、か
つ、首部外周に雄ねじのある形状の外容器が、半割状の
金型で簡単に製造することができ、しかも内容器は開口
部にフランジを有するだけの単純な形状であるため、深
さが複数種類のものを製造する場合も比較的低コストで
製造でき、全体として従来品に比べて大幅なコスト減が
図られる。As described above, in the synthetic resin double-structured container of the present invention, the outer container is formed into a wide-mouthed bottle shape by blow molding, and the inner container is inserted through the opening and is joined at the opening. By doing so, an outer container with a bulged lower part and a male thread on the outer circumference of the neck can be easily manufactured with a half-mold, and the inner container has a flange at the opening. Since it has a simple shape, it can be manufactured at a relatively low cost even when manufacturing a plurality of kinds of depths, and a large cost reduction can be achieved as a whole as compared with the conventional product.
【００２０】また、外容器の底壁上面の凹部に内容器底
壁下面の凸部を嵌合させることにより、内外容器の嵌合
状態が安定化し、強度の高いものが得られる。By fitting the convex portion of the lower surface of the inner container bottom wall into the concave portion of the upper surface of the bottom wall of the outer container, the fitted state of the inner and outer containers is stabilized, and the one having high strength can be obtained.
【００２１】更に、外容器のブロー成形に際し、打込ピ
ンの先端を、成形される容器の底壁上面に押し当るよう
にしたことにより、底壁が内側の打込ピンと外側の金型
とに挾まれた状態で両面から冷却されるため、脱型冷却
後の底壁の変形が少くなり、冷却変形量を小さく見積も
った平らな底面形状の容器が成形できる。Further, when the outer container is blow-molded, the tip of the driving pin is pressed against the upper surface of the bottom wall of the container to be molded, so that the bottom wall serves as the inner driving pin and the outer mold. Since it is cooled from both sides in the sandwiched state, the deformation of the bottom wall after demolding and cooling is small, and a container having a flat bottom shape with a small cooling deformation amount can be formed.
【図１】本発明に係る容器の一実施例の断面図である。FIG. 1 is a sectional view of an embodiment of a container according to the present invention.
【図２】本発明に係る容器製造方法の内の内容器の製造
例を示す断面図である。FIG. 2 is a cross-sectional view showing a manufacturing example of the inner container in the container manufacturing method according to the present invention.
【図３】（イ）〜（ニ）は同上の外容器の製造例の工程
を示す断面図である。3A to 3D are cross-sectional views showing the steps of a manufacturing example of the above outer container.
【図４】（イ）（ロ）はそれぞれ従来の容器の例を示す
断面図である。4A and 4B are cross-sectional views showing examples of conventional containers.
１ 外容器 １ａ，２ａ 胴部 １ｂ，２ｂ 底壁 ２ 内容器 ３ 首部 ４ 雄ねじ ５ 凹部 ７ 凸部 ６ フランジ １０，１１，１４，１５ 金型 １２ ノズル １３ パリソン １６ ホットカッター １７ 打込ピン １８ エア流路 １９ 開口部内面成形部 ２０ 押圧用凸部 1 Outer Container 1a, 2a Body 1b, 2b Bottom Wall 2 Inner Container 3 Neck 4 Male Thread 5 Recess 7 Convex 6 Flange 10, 11, 14, 15 Mold 12 Nozzle 13 Parison 16 Hot Cutter 17 Driving Pin 18 Air Flow Road 19 Inner surface forming portion 20 Pressing convex portion
Claims (3)
と、該外容器の開口部より内方に挿入され、該外容器の
外口縁部に当接するフランジを開口部に有する射出成形
された内容器とからなる合成樹脂製二重構造容器。1. A blow-molded outer container in the shape of a wide-mouthed bottle, and an injection-molded container having an opening having a flange that is inserted inward from the opening of the outer container and is in contact with the outer opening edge of the outer container. A double structure container made of synthetic resin consisting of an inner container.
内に内容器の底壁下面に一体成形した凸部を嵌合させて
なる請求項１に記載の合成樹脂製二重構造容器。2. The double structure of synthetic resin according to claim 1, wherein a concave portion is provided on the upper surface of the bottom wall of the outer container, and a convex portion integrally formed with the lower surface of the bottom wall of the inner container is fitted in the concave portion. container.
に垂下させたパリソンを半割金型内にホールドし、該金
型の開口部上にてパリソンを切断した後、該金型内のパ
リソン内に該金型によって成形される容器の底部に達す
る長さの打込ピンを挿入し、該パリソン内に空気を圧入
して広口瓶形状に膨脹させるとともに、該容器の底部を
打込ピンの下端にて金型底部側に押圧させて外容器を成
形し、射出成形機によって別に成形した内容器を前記外
容器内に嵌合させることを特徴としてなる合成樹脂製二
重構造容器の製造方法。3. A parison suspended from a ring-shaped nozzle of a blow molding machine in a cylindrical shape is held in a mold half, and the parison is cut on the opening of the mold, and then the parison is cut into the mold. A driving pin having a length reaching the bottom of the container molded by the mold is inserted into the parison, air is forced into the parison to expand into a wide-mouth bottle shape, and the bottom of the container is driven into the driving pin. Manufacture of a double structure container made of synthetic resin characterized by pressing the bottom of the mold toward the bottom of the mold to mold an outer container, and fitting an inner container separately molded by an injection molding machine into the outer container. Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7026208A JP2707421B2 (en) | 1995-01-20 | 1995-01-20 | Double-layer container made of synthetic resin and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7026208A JP2707421B2 (en) | 1995-01-20 | 1995-01-20 | Double-layer container made of synthetic resin and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08198256A true JPH08198256A (en) | 1996-08-06 |
| JP2707421B2 JP2707421B2 (en) | 1998-01-28 |
Family
ID=12187041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7026208A Expired - Fee Related JP2707421B2 (en) | 1995-01-20 | 1995-01-20 | Double-layer container made of synthetic resin and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2707421B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006111271A (en) * | 2004-10-12 | 2006-04-27 | Shoji Kagaku:Kk | Manufacturing method for synthetic resin double structure container |
| JP2013034677A (en) * | 2011-08-08 | 2013-02-21 | Kao Corp | Shock absorbing structure for cosmetic container |
| KR101641819B1 (en) * | 2015-02-13 | 2016-07-21 | 최귀환 | Manufacturing apparatus for dual cosmetic container using blow molding |
| CN116119149A (en) * | 2023-04-10 | 2023-05-16 | 河北世纪恒泰富塑业有限公司 | Soluble Polytetrafluoroethylene (PFA) hollow container |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6099225U (en) * | 1983-12-09 | 1985-07-06 | 喜多 義夫 | container |
| JPS6370927U (en) * | 1986-10-27 | 1988-05-12 |
-
1995
- 1995-01-20 JP JP7026208A patent/JP2707421B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6099225U (en) * | 1983-12-09 | 1985-07-06 | 喜多 義夫 | container |
| JPS6370927U (en) * | 1986-10-27 | 1988-05-12 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006111271A (en) * | 2004-10-12 | 2006-04-27 | Shoji Kagaku:Kk | Manufacturing method for synthetic resin double structure container |
| JP4609792B2 (en) * | 2004-10-12 | 2011-01-12 | 株式会社庄司化学 | Method for producing a synthetic resin double structure container |
| JP2013034677A (en) * | 2011-08-08 | 2013-02-21 | Kao Corp | Shock absorbing structure for cosmetic container |
| KR101641819B1 (en) * | 2015-02-13 | 2016-07-21 | 최귀환 | Manufacturing apparatus for dual cosmetic container using blow molding |
| CN116119149A (en) * | 2023-04-10 | 2023-05-16 | 河北世纪恒泰富塑业有限公司 | Soluble Polytetrafluoroethylene (PFA) hollow container |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2707421B2 (en) | 1998-01-28 |
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