JP4545482B2 - Blow molding container molding method - Google Patents

Blow molding container molding method Download PDF

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JP4545482B2
JP4545482B2 JP2004134919A JP2004134919A JP4545482B2 JP 4545482 B2 JP4545482 B2 JP 4545482B2 JP 2004134919 A JP2004134919 A JP 2004134919A JP 2004134919 A JP2004134919 A JP 2004134919A JP 4545482 B2 JP4545482 B2 JP 4545482B2
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mouth
container
blow
mold surface
molding
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JP2005313503A (en
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勝 田村
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Yoshino Kogyosho Co Ltd
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Yoshino Kogyosho Co Ltd
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本発明は、ブロー成形容器成形方法に関するものである。 The present invention relates to a molding method for blow molding containers.

ブロー容器の成形方法であって、ブロー成形時に、容器の口部に口径決定ブローピンを挿入することにより容器の口部を成形する方法は、従来より知られている(特許文献1参照)。   2. Description of the Related Art Conventionally, a blow container forming method is known in which a mouth of a container is formed by inserting a diameter determining blow pin into the mouth of the container at the time of blow molding (see Patent Document 1).

従来の容器は、口部上端天面と口部内周面との間の角度は、ほぼ直角であった。
そのため、口部上端内周縁にバリが発生し易くなり、パッキングを用いた場合や中栓を被嵌した場合に、密封性が低下するという問題があった。
また、飲料容器として使用する場合、口部上端内周縁で唇を傷付けるおそれもあり、飲料用容器に適さないという問題もあった。
特公昭45−31397号公報
In the conventional container, the angle between the top upper surface of the mouth and the inner peripheral surface of the mouth is almost a right angle.
For this reason, burrs are likely to occur at the inner periphery of the upper end of the mouth, and there is a problem that the sealing performance is lowered when packing is used or when an inner plug is fitted.
Moreover, when using as a drink container, there also exists a possibility that a lip may be damaged by the inner periphery of the upper end of a mouth part, and there also existed a problem that it was not suitable for a drink container.
Japanese Patent Publication No. 45-31397

本発明は、上記問題を解決することを課題として、ブロー成形時に、大径部と小径部とテーパー部とから構成され、口部上端内周縁を形成するブローピンを用いて、口部上端内周にテーパー面を形成したブロー成形容器成形方法を提供することを目的とする。 An object of the present invention is to solve the above-described problems, and at the time of blow molding, a blow pin that includes a large-diameter portion, a small-diameter portion, and a tapered portion and that forms an upper-end inner peripheral edge of the mouth, and to provide a method of molding a blow-molded container obtained by forming a tapered surface on.

本発明は、上記の課題を解決するため、ブロー成形容器の成形方法として、容器成形型面に、上方から順に、薄肉のクリンプガイド部を成形するクリンプガイド部型面と、口部を成形する上端拡径部型面と縮径部型面とねじ筒部型面とを備えた口部型面を設けたブロー金型に、大径部と小径部を連設するテーパー部から構成されるブローピンを挿入してブロー成形した後、クリンプガイド部を容器口部より除去することにより、口部の上端に、内周面をテーパー面とし、外周縁を外方に突出させ、周縁上端の角部を丸みづけして平滑にした口元部を連設した容器口部を成形することを特徴とする構成を採用する。 In order to solve the above-described problems, the present invention forms a crimp guide part mold surface for forming a thin crimp guide part and a mouth part on the container mold surface from the top as a blow molding container molding method. Consists of a taper part connecting a large diameter part and a small diameter part to a blow mold provided with a mouth part mold surface having an upper end enlarged diameter part mold surface, a reduced diameter part mold surface and a screw cylinder part mold surface. After the blow pin is inserted and blow molded, the crimp guide part is removed from the container mouth part so that the inner peripheral surface is a tapered surface at the upper end of the mouth part and the outer peripheral edge protrudes outward. The structure characterized by shape | molding the container mouth part which connected the mouth part which rounded and smoothed the part was employ | adopted.

本発明のブロー成形容器の口部成形方法は、パリソンからブロー成形される容器の口部に、大径部と小径部とテーパー部とから構成されたブローピンを挿入して、テーパー部とブロー金型の容器口部型面とを協働させ、成形後に、クリンプガイド部を容器口部より除去することにより、口部上端内周にテーパー面を成形したので、飲料容器に用いても唇を傷つけることなく、また、中栓、パッキン等によるシール性の安定性が得られるとともに、生産性を低下させることなく製品化できるようになった。   The blow molding container mouth molding method of the present invention is such that a blow pin composed of a large diameter portion, a small diameter portion and a taper portion is inserted into the mouth portion of a container blow molded from a parison, and the taper portion and the blow metal Since the taper surface is formed on the inner periphery of the upper end of the mouth part by cooperating with the container mouth part mold surface of the mold and removing the crimp guide part from the container mouth part after molding, the lips can be used even in beverage containers. It became possible to produce a product without damaging it, and with stability of sealing performance by an inner plug, packing, etc., and without reducing productivity.

次に、本発明のブロー成形容器の口部成形方法について図面を参照して説明する。
図1は、本発明の容器口部成形方法に用いられるブロー成形金型の概略説明図である。
図1において、Aはブロー金型、Bは吹込み部材、B1はスリーブ、B2はブローピン、Cはブロー成形容器である。
Next, the method for forming the mouth portion of the blow molded container of the present invention will be described with reference to the drawings.
FIG. 1 is a schematic explanatory diagram of a blow molding die used in the container mouth portion molding method of the present invention.
In FIG. 1, A is a blow mold, B is a blowing member, B1 is a sleeve, B2 is a blow pin, and C is a blow molded container.

ブロー金型Aは、二つの割型A1、A2とからなり、それぞれの割型A1、A2は、クリンプガイド部型面1、並びに容器の口部型面2、肩部型面3、胴部型面4、および底部型面5とからなる容器成形型面6とを具備しており、下端は、ピンチオフ部7となっている。   The blow mold A is composed of two split molds A1 and A2. The split molds A1 and A2 are respectively a crimp guide part mold surface 1, a container mouth mold surface 2, a shoulder mold surface 3, and a body part. A container mold surface 6 including a mold surface 4 and a bottom mold surface 5 is provided, and a pinch-off portion 7 is provided at the lower end.

容器の口部型面2は、上端拡径部型面2a、縮径部型面2bとねじ筒部型面2cと、凹条部型面2dとからなっている。   The mouth portion mold surface 2 of the container is composed of an upper end enlarged portion mold surface 2a, a reduced diameter portion mold surface 2b, a screw tube portion mold surface 2c, and a concave portion mold surface 2d.

吹込み部材Bは、スリーブB1と、該スリーブB1内で摺動自在としたブローピンB2とからなっており、ブローピンB2は、外周面に大径部10と小径部11、および大径部10と小径部11とを接続するテーパー部12とを具えており、中心には、空気吹込み孔13が穿孔されている。   The blowing member B includes a sleeve B1 and a blow pin B2 that is slidable in the sleeve B1, and the blow pin B2 includes a large diameter portion 10, a small diameter portion 11, and a large diameter portion 10 on the outer peripheral surface. It has a tapered portion 12 that connects to the small diameter portion 11, and an air blowing hole 13 is drilled in the center.

次に、成形方法について説明する。
従来公知の成形方法と同様に、押出ダイからパリソンPが肉厚調整されて下方に押出される。
降下されたパリソンPは、ブロー金型Aによって型締めされ、パリソンPの上方部が切断される。
その際、パリソンPは、とくに、容器の口部型面2の縮径部型面2bでしっかりと挟持される。
Next, the molding method will be described.
Similar to the conventionally known molding method, the parison P is adjusted in thickness from the extrusion die and extruded downward.
The lowered parison P is clamped by the blow mold A, and the upper portion of the parison P is cut.
At that time, the parison P is firmly clamped particularly by the reduced-diameter portion surface 2b of the mouth portion surface 2 of the container.

次いで、吹込み部BのスリーブB1がブロー金型Aの上端に当接するとともに、テーパー部12の上端が、容器の口部型面2の上端にほぼ接するような所定位置までブローピンB2を下降させ、下降中に、空気吹込み孔13よりブローエアを吹込み始める。
クリンプガイド部に対応するパリソンPは、薄肉となっているので、ブローピンB2のテーパー部12の上端が、口部型面2の上端にほぼ達する間に、図2に示すように、クリンプガイド部型面1によって、薄肉の蛇腹状のクリンプガイド部20が形成される。
Next, the blow pin B2 is lowered to a predetermined position so that the sleeve B1 of the blowing portion B contacts the upper end of the blow mold A and the upper end of the tapered portion 12 substantially contacts the upper end of the mouth mold surface 2 of the container. During the lowering, blow air starts to be blown from the air blow hole 13.
Since the parison P corresponding to the crimp guide portion is thin, as shown in FIG. 2, while the upper end of the taper portion 12 of the blow pin B2 substantially reaches the upper end of the mouth portion mold surface 2, the crimp guide portion The mold surface 1 forms a thin bellows-like crimp guide portion 20.

次いで、ブローピンB2が所定位置まで達すると、容器成形型面6の口部型面2によって容器口部21が成形され、肩部型面3によって肩部22、胴部型面4によって胴部23が形成され、底部型面5によって底部24が形成される。   Next, when the blow pin B2 reaches a predetermined position, the container mouth portion 21 is formed by the mouth portion mold surface 2 of the container forming mold surface 6, the shoulder portion surface 3 by the shoulder portion 22, and the trunk portion mold surface 4 by the body portion 23. The bottom 24 is formed by the bottom mold surface 5.

成形が完了したときに、ブロー金型Aが型開きされ、成形されたクリンプガイド付容器が取出され、クリンプガイド部20の下端部がカットされ、容器と分離され、ブロー成形容器Cを得ることができる。   When molding is completed, the blow mold A is opened, the molded container with the crimp guide is taken out, the lower end of the crimp guide 20 is cut, separated from the container, and the blow molded container C is obtained. Can do.

図3に示すように、ブロー成形された容器口部21は、ブローピンB2の小径部11と、テーパー部12と上端拡径部型面2aと縮径部型面2b、およびねじ筒部型面2cとの間に形成される内周縁をテーパー面25とした口部上端の口元部26と、ねじ筒部27が構成される。   As shown in FIG. 3, the blow-molded container mouth portion 21 includes a small-diameter portion 11 of the blow pin B2, a tapered portion 12, an upper-end enlarged-diameter portion mold surface 2a, a reduced-diameter portion mold surface 2b, and a screw cylinder portion mold surface. A mouth portion 26 at the upper end of the mouth portion having an inner peripheral edge formed between 2c and a tapered surface 25, and a screw tube portion 27 are formed.

次に、ブロー成形容器Cの口部について説明する。
図3に示すように、成形されたブロー容器は、前述のように、口部21と肩部22、胴部23、底部24とからなり、口部21の上端の口元部26の外周縁は、外方に突出しており、上端角部は丸く平滑になっており、口元部26内周縁にはテーパー面25が形成されている。
Next, the mouth part of the blow molded container C will be described.
As shown in FIG. 3, the molded blow container is composed of the mouth portion 21, the shoulder portion 22, the trunk portion 23, and the bottom portion 24, and the outer peripheral edge of the mouth portion 26 at the upper end of the mouth portion 21 is as described above. The upper end corner is round and smooth, and a tapered surface 25 is formed on the inner peripheral edge of the mouth portion 26.

したがって、得られたブロー成形容器は、その口元部の外周は丸みが付され、内周縁はテーパー面となっているので、飲料用容器等直接口を付けて使用する場合に、唇等を傷つけることはない。   Therefore, since the outer periphery of the mouth part of the obtained blow molded container is rounded and the inner peripheral edge is a tapered surface, the lip or the like is damaged when the container is directly attached to a beverage container or the like. There is nothing.

また、口部上面内周縁がテーパー面となっているので、バリの発生を防止することができ、中栓やパッキンを用いた場合の密封性を確保することができる。   In addition, since the inner peripheral edge of the upper surface of the mouth portion is a tapered surface, the generation of burrs can be prevented, and the sealing performance when an inner plug or packing is used can be ensured.

シャンプー、リンス、化粧料、薬剤等の内容物が充填されたブロー容器として供されるのみならず、飲料容器に用いても、唇を傷つけることなく、いつでも快適に利用できる。   Not only is it provided as a blow container filled with contents such as shampoo, rinse, cosmetics, and medicine, but it can be used comfortably at any time without damaging the lips even when used in a beverage container.

ブロー成形金型とブロー成形時の説明図である。It is explanatory drawing at the time of blow molding metal mold | die and blow molding. 成形品の説明図である。It is explanatory drawing of a molded article. 成形された容器を示す一部断面立面図である。It is a partial cross section elevation which shows the shape | molded container.

符号の説明Explanation of symbols

A ブロー金型
A1、A2 割型
B 吹込み部材
B1 スリーブ
B2 ブローピン
C ブロー成形容器
P パリソン
1 クリンプガイド部型面
2 口部型面
2a 上端拡径部型面
2b 縮径部型面
2c ねじ筒部型面
2d 凹条部型面
3 肩部金型
4 胴部型面
5 底部型面
6 容器成形型面
7 ピンチオフ部
10 大径部
11 小径部
12 テーパー部
13 空気吹込み孔
14 案内
15 連杆
16 オリフィス
20 クリンプガイド部
21 口部
22 肩部
23 胴部
24 底部
25 テーパー面
26 口元部
27 ねじ筒部
A Blow mold A1, A2 Split mold B Blowing member B1 Sleeve B2 Blow pin C Blow molding container P Parison 1 Crimp guide part mold surface 2 Mouth part mold surface 2a Upper diameter expansion part mold surface 2b Reduced diameter part mold surface
2c Screw cylinder part mold surface 2d Convex part mold surface 3 Shoulder mold 4 Body mold surface 5 Bottom mold surface 6 Container mold surface 7 Pinch-off part 10 Large diameter part 11 Small diameter part 12 Taper part 13 Air blowing hole 14 Guide 15 Continuous 16 Orifice 20 Crimp guide part 21 Mouth part 22 Shoulder part 23 Body part 24 Bottom part 25 Taper surface 26 Mouth part 27 Screw cylinder part

Claims (1)

容器成形型面に、上方から順に、薄肉のクリンプガイド部を成形するクリンプガイド部型面と、口部を成形する上端拡径部型面と縮径部型面とねじ筒部型面とを備えた口部型面を設けたブロー金型に、大径部と小径部を連設するテーパー部から構成されるブローピンを挿入してブロー成形した後、クリンプガイド部を容器口部より除去することにより、
口部の上端に、内周面をテーパー面とし、外周縁を外方に突出させ、周縁上端の角部を丸みづけして平滑にした口元部を連設した容器口部を成形することを特徴とするブロー成形容器の成形方法。
A crimp guide part mold surface for forming a thin crimp guide part on the container mold surface from the top, an upper diameter enlarged part mold surface, a reduced diameter part mold surface, and a screw cylinder part mold surface for molding a mouth part. After inserting the blow pin composed of the tapered portion connecting the large diameter portion and the small diameter portion into the blow mold provided with the mouth portion mold surface provided and blow molding, the crimp guide portion is removed from the container mouth portion. By
Forming a container mouth that has a tapered mouth at the upper end of the mouth, an outer peripheral edge that protrudes outward, and a rounded corner at the upper edge of the periphery that is smoothed. A method for forming a blow molded container.
JP2004134919A 2004-04-28 2004-04-28 Blow molding container molding method Expired - Fee Related JP4545482B2 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5265254B2 (en) * 2008-06-26 2013-08-14 株式会社吉野工業所 Resin ampoule
CN106079373A (en) * 2016-06-22 2016-11-09 苏州宝柏塑胶有限公司 The ventilative disposal molding bottleneck processing technique of a kind of sealing

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5469174A (en) * 1977-11-14 1979-06-02 Yoshino Kogyosho Co Ltd Orientation forming method of mouth edge part of piece
JPH04351525A (en) * 1991-05-30 1992-12-07 Seibu Kk Manufacture of synthetic resin vessel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5469174A (en) * 1977-11-14 1979-06-02 Yoshino Kogyosho Co Ltd Orientation forming method of mouth edge part of piece
JPH04351525A (en) * 1991-05-30 1992-12-07 Seibu Kk Manufacture of synthetic resin vessel

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