JPH11227034A - Blow molding of bottle body - Google Patents
Blow molding of bottle bodyInfo
- Publication number
- JPH11227034A JPH11227034A JP10035598A JP3559898A JPH11227034A JP H11227034 A JPH11227034 A JP H11227034A JP 10035598 A JP10035598 A JP 10035598A JP 3559898 A JP3559898 A JP 3559898A JP H11227034 A JPH11227034 A JP H11227034A
- Authority
- JP
- Japan
- Prior art keywords
- bottle
- bottle body
- blow molding
- pressure gas
- gas
- 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
Landscapes
- Containers Having Bodies Formed In One Piece (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、ポリエチレンテレ
フタレート樹脂等の合成樹脂製壜体の熱固定２軸延伸ブ
ロー成形方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-setting biaxial stretch blow molding method for a synthetic resin bottle such as polyethylene terephthalate resin.
【０００２】[0002]
【従来の技術】ポリエチレンテレフタレート樹脂等の合
成樹脂製の壜体の内、壜体の成形金型の金型温度を高め
ることにより、成形される壜体の耐熱性を高める熱固定
２軸延伸ブロー成形方法が知られている。2. Description of the Related Art Among bottles made of a synthetic resin such as polyethylene terephthalate resin, a heat-setting biaxial stretching blow for increasing the heat resistance of a bottle to be molded by increasing the mold temperature of a mold for molding the bottle. Molding methods are known.
【０００３】この熱固定２軸延伸ブロー成形方法は、成
形金型の金型温度を高温にした状態で壜体を２軸延伸ブ
ロー成形し、このブロー成形処理後、成形された壜体
を、その形状が安定するまで冷却してから離型させてい
る。In this heat-fixing biaxial stretch blow molding method, a bottle is biaxially stretch blow-molded in a state where a mold temperature of a molding die is set to a high temperature. The mold is released after cooling until its shape is stabilized.
【０００４】この壜体に対するブロー成形処理後の冷却
処理は、ブロー成形操作のタイミングに合わせて金型温
度を低下させ、この型温を低下させた金型により達成す
る方法と、ブロー成形操作のタイミングに合わせて、コ
ンプレッサーから専用の冷却用気体を壜体内に噴出させ
る方法とが利用されている。[0004] The cooling process of the bottle after the blow molding process is performed by lowering the temperature of the mold in accordance with the timing of the blow molding operation. A method of injecting a dedicated cooling gas from a compressor into a bottle in accordance with the timing is used.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記し
た従来技術の内、前者の金型温度を低下させる方法にあ
っては、金型に対する温度制御がきわめて面倒となるば
かりか、金型の制御温度幅が大きいので、その制御に時
間が掛かり、このため壜体の成形サイクルが長くなっ
て、生産効率が低くなると云う問題があった。However, among the above-mentioned prior arts, in the former method for lowering the mold temperature, not only is the temperature control for the mold extremely troublesome, but also the control temperature of the mold is extremely low. Since the width is large, it takes a long time for the control, and there is a problem that the molding cycle of the bottle is lengthened and the production efficiency is reduced.
【０００６】また、従来技術の内、後者の専用の冷却用
気体を使用する方法にあっては、専用の冷却用気体と、
この冷却用気体を貯蔵すると共に、成形された壜体内に
高圧状態のまま噴出させるためのコンプレッサーを主体
とした設備を必要とし、このため壜体の離型を達成する
だけの設備に、大きい経費と、金型付近に大きな設置ス
ペースとを必要とし、このため設備費が増大すると共
に、金型装置全体が複雑化および大型化し、壜体の製造
経費が割高となるばかりか、保守管理が面倒となると云
う問題があった。[0006] In the prior art, in the latter method using a dedicated cooling gas, a dedicated cooling gas is used.
Equipment that mainly stores a compressor for storing this cooling gas and for injecting it into the molded bottle in a high-pressure state is required. Therefore, equipment that only releases the bottle is a large expense. Requires a large installation space in the vicinity of the mold, which increases equipment costs, makes the entire mold apparatus complicated and bulky, not only increases the manufacturing cost of bottles, but also complicates maintenance and management. There was a problem that would be.
【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、壜体のブロ
ー成形に使用された圧力気体を、この壜体の冷却に利用
することを技術的課題とし、もって冷却のための専用の
冷却気体および設備を要することなく、離型のための壜
体の形状の安定化を速やかにかつ簡単に得ることを目的
とする。Accordingly, the present invention has been made to solve the above-mentioned problems in the prior art, and it is an object of the present invention to utilize a pressurized gas used for blow molding of a bottle for cooling the bottle. It is an object of the present invention to quickly and easily obtain the stabilization of the shape of a bottle for release without requiring a dedicated cooling gas and equipment for cooling.
【０００８】[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、合成樹脂製壜体の熱固定２軸延伸ブ
ロー成形に関するものであること、ブロー処理完了時
に、２軸延伸ブロー成形された壜体内に圧入された圧力
気体の一部を、この壜体外に回収すること、この回収し
た圧力気体を、ブロー成形処理の完了した壜体内の圧力
気体を排出しながら、この壜体の内表面に吹き付けるこ
と、にある。The means for solving the above technical problems relates to the heat-setting biaxial stretch blow molding of a synthetic resin bottle, and when the blow processing is completed, the biaxial stretch blow is performed. A part of the pressurized gas press-fitted into the molded bottle is collected outside the bottle, and the collected pressure gas is discharged while discharging the pressurized gas from the blow-molded bottle. Spraying on the inner surface of the
【０００９】壜体のブロー成形処理完了、すなわち圧力
気体源から壜体内への圧力気体の供給停止と同時に、壜
体内の圧力気体の一部を、この壜体内の圧力気体の圧力
を利用して、壜体外に回収する。At the same time as the completion of the blow molding of the bottle, that is, the supply of the pressurized gas from the pressurized gas source to the bottle is stopped, a part of the pressurized gas in the bottle is utilized by utilizing the pressure of the pressurized gas in the bottle. , Recover outside the bottle.
【００１０】次いで、ブロー成形処理の完了した壜体内
の圧力気体の排出を行いながら、壜体外に回収した圧力
気体を、壜体内表面に吹き付ける。Next, the pressure gas collected outside the bottle is blown onto the surface of the bottle while discharging the pressurized gas in the bottle after the blow molding process is completed.
【００１１】この回収した圧力気体の壜体内表面への吹
き付けにより、壜体の冷却が促進され、離型前の壜体の
形状安定化が達成される。By spraying the collected pressure gas onto the surface of the bottle, cooling of the bottle is promoted, and the shape of the bottle before releasing is stabilized.
【００１２】[0012]
【発明の実施の形態】以下、本発明の一実施例を図面を
参照しながら説明する。図１は、本発明を実施する管路
構成の好ましい一例を示すもので、ブロー成形の圧力気
体源３は、金型２内の壜体１に、途中に第１バルブ５を
有する管路で接続されている。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a preferred example of a pipeline configuration for carrying out the present invention. A blow gas pressure gas source 3 is connected to a bottle 1 in a mold 2 by a pipeline having a first valve 5 in the middle. It is connected.
【００１３】ＯＮ状態で圧力気体源３を壜体１に接続す
る第１バルブ５には、ＯＦＦ状態で壜体１内を、圧力気
体回収用のアキュムレータ４に接続する、途中に第１逆
止弁８を有する管路が接続されており、また壜体１から
第１バルブ５に接続している管路の分岐したもう一つの
先端は、ＯＦＦ状態で遮断し、ＯＮ状態で消音マフラー
１０を介して開放する第２バルブ６に接続されている。A first valve 5 for connecting the pressurized gas source 3 to the bottle 1 in the ON state is connected to an accumulator 4 for collecting the pressurized gas in the OFF state, and a first check valve is provided in the middle. A pipe line having a valve 8 is connected, and the other branched end of the pipe line connecting the bottle 1 to the first valve 5 is cut off in the OFF state, and the muffler 10 is turned on in the ON state. It is connected to a second valve 6 which is opened via a valve.
【００１４】第１逆止弁８の下流側のアキュムレータ４
に接続した管路は、ＯＮ状態で接続状態となり、ＯＦＦ
状態で遮断状態となる第３バルブ７に接続されており、
この第３バルブ７は、途中に第２逆止弁９を有する管路
を介して壜体１内に接続されている。The accumulator 4 on the downstream side of the first check valve 8
Is connected to the ON state and OFF.
Is connected to the third valve 7 which is shut off in the state,
The third valve 7 is connected to the inside of the bottle 1 via a pipe having a second check valve 9 on the way.
【００１５】第１バルブ５をＯＮ、第２バルブ６をＯＦ
Ｆ、第３バルブ７をＯＦＦ状態にして、壜体１のブロー
成形を行い、一定時間後、第１バルブ５をＯＦＦ状態に
切替えることにより、壜体１のブロー成形処理を完了さ
せる。The first valve 5 is turned on, and the second valve 6 is turned off.
F: The third valve 7 is turned off to blow-mold the bottle 1, and after a certain period of time, the first valve 5 is switched to the off-state to complete the blow-molding process of the bottle 1.
【００１６】壜体１のブロー成形処理完了と同時に、す
なわち第１バルブ５のＯＦＦ状態への切替えにより、壜
体１をブロー成形した壜体１内の圧力気体の一部が、第
１バルブ５と第１逆止弁８を通ってアキュムレータ４に
回収される。At the same time as the completion of the blow molding of the bottle 1, that is, by switching the first valve 5 to the OFF state, a part of the pressurized gas in the bottle 1 which has been blow-molded from the bottle 1 makes the first valve 5. And is collected by the accumulator 4 through the first check valve 8.
【００１７】第１バルブ５をＯＦＦしてから０．１〜
１．０秒後に、第２バルブ６と第３バルブ７をＯＮ状態
に切替えて、第２バルブ６を通して壜体１内の圧力気体
を排出すると共に、第３バルブ７を通してアキュムレー
タ４に収納されている圧力気体を、壜体１の内表面に吹
き付け、壜体１の冷却を促進させる。After turning off the first valve 5, 0.1 to
After 1.0 second, the second valve 6 and the third valve 7 are switched to the ON state to discharge the pressurized gas in the bottle 1 through the second valve 6 and to be stored in the accumulator 4 through the third valve 7. The pressurized gas is blown onto the inner surface of the bottle 1 to promote cooling of the bottle 1.
【００１８】第３バルブ７は、予め設定されている型開
き時点よりも前の時点、具体的にはＯＮしてから１秒に
満たない時点でＯＦＦ状態に切替えられ、第２バルブ６
を通しての排気により、型開き時点までに、壜体１内の
圧力を、離型を可能とする値まで確実に低下させる。The third valve 7 is switched to the OFF state at a time before a preset mold opening time, specifically, at a time less than 1 second after being turned on.
By this, the pressure in the bottle 1 is reliably reduced to a value that allows the mold to be released by the time the mold is opened.
【００１９】[0019]
【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。壜体のブロー成形に使用
した圧力気体の一部を、そのままブロー成形されたばか
りの壜体の離型のための冷却に利用するので、壜体冷却
のための専用の冷却用圧力気体を作る必要がなく、もっ
て設備経費の削減と設備の構造簡単化および小型化を得
ることができると共に、ブロー成形用の圧力気体の顕著
な有効利用を得ることができる。Since the present invention has the above-described structure, the following effects can be obtained. A part of the pressurized gas used for blow molding of bottles is used as it is for cooling for mold release of bottles that have just been blow molded, so it is necessary to create a dedicated cooling pressure gas for cooling bottles. Therefore, it is possible to reduce the cost of the equipment, simplify the structure of the equipment, and reduce the size of the equipment, and to obtain a remarkably effective use of the pressurized gas for blow molding.
【００２０】壜体のブロー成形に使用した圧力気体の一
部を、壜体の内表面に吹き付けての冷却は、壜体内の圧
力気体を排出しながら行うので、壜体の内表面に吹き付
けられる圧力気体は、壜体内表面に対して常に新しい圧
力気体が吹き付けられることになり、もって高い冷却作
用を発揮することになる。A part of the pressurized gas used for the blow molding of the bottle is blown onto the inner surface of the bottle because cooling is performed while discharging the pressurized gas inside the bottle. The pressurized gas always blows a new pressurized gas onto the surface of the bottle, and thus exerts a high cooling effect.
【００２１】壜体のブロー成形に使用した圧力気体の一
部の壜体内表面への吹き付けは、ブロー成形処理の完了
した壜体内の圧力気体の排出期間内に行われるので、壜
体の成形サイクルを長くすることがなく、もって壜体の
生産効率を低下させる恐れは全くない。Since a part of the pressurized gas used for blow molding the bottle is sprayed onto the surface of the bottle within the period of discharging the pressurized gas from the bottle after the blow molding process is completed, the molding cycle of the bottle is performed. And there is no danger of lowering bottle production efficiency.
【００２２】壜体のブロー成形に使用した圧力気体の一
部を貯蔵し、この圧力気体の一部を壜体内に戻すだけで
良いので、きわめて簡単な構成で実施可能であり、もっ
て実施設備の取扱いおよび保守管理が簡単である。Since it is only necessary to store a part of the pressurized gas used for the blow molding of the bottle and to return a part of the pressurized gas to the bottle, it is possible to carry out the operation with a very simple structure. Easy handling and maintenance.
【図１】本発明を実施した管路の一例を示す、管路構成
図。FIG. 1 is a pipeline configuration diagram showing an example of a pipeline embodying the present invention.
１ ； 壜体 ２ ； 金型 ３ ； 圧力気体源 ４ ； アキュムレータ ５ ； 第１バルブ ６ ； 第２バルブ ７ ； 第３バルブ ８ ； 第１逆止弁 ９ ； 第２逆止弁 １０； 消音マフラー Reference Signs List 1; bottle 2; mold 3; pressurized gas source 4; accumulator 5; first valve 6; second valve 7; third valve 8; first check valve 9; second check valve 10;
【手続補正書】[Procedure amendment]
【提出日】平成１０年２月２０日[Submission date] February 20, 1998
【手続補正１】[Procedure amendment 1]
【補正対象書類名】図面[Document name to be amended] Drawing
【補正対象項目名】全図[Correction target item name] All figures
【補正方法】変更[Correction method] Change
【補正内容】[Correction contents]
【図１】 FIG.
Claims (1)
成形において、ブロー処理完了時に、前記壜体(1) 内に
圧入された圧力気体の一部を前記壜体(1) 外に回収し、
該回収した圧力気体を、前記壜体(1) 内の圧力気体を排
出しながら、前記壜体(1) の内表面に吹き付ける壜体の
ブロー成形方法。In the heat-setting biaxial stretch blow molding of a synthetic resin bottle, a part of the pressurized gas press-fitted into the bottle (1) is discharged to the outside of the bottle (1) when the blowing process is completed. Collected,
A method for blow molding a bottle, in which the collected pressure gas is blown onto the inner surface of the bottle (1) while discharging the pressure gas in the bottle (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03559898A JP3843335B2 (en) | 1998-02-18 | 1998-02-18 | Blow molding method for housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP03559898A JP3843335B2 (en) | 1998-02-18 | 1998-02-18 | Blow molding method for housing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11227034A true JPH11227034A (en) | 1999-08-24 |
| JP3843335B2 JP3843335B2 (en) | 2006-11-08 |
Family
ID=12446262
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP03559898A Expired - Fee Related JP3843335B2 (en) | 1998-02-18 | 1998-02-18 | Blow molding method for housing |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3843335B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003011569A1 (en) * | 2001-07-31 | 2003-02-13 | Yoshino Kogyosho Co., Ltd. | Method of manufacturing bottle formed mainly of polyethylene terephthalate resin |
| CN102962983A (en) * | 2012-09-06 | 2013-03-13 | 林世鸿 | High energy-saving type full-automatic bottle blowing machine with external recovered gas storage tank |
| CN113459473A (en) * | 2020-03-30 | 2021-10-01 | Gea普洛克玛柯股份公司 | Apparatus and method for aseptically forming containers starting from parisons made of thermoplastic material |
-
1998
- 1998-02-18 JP JP03559898A patent/JP3843335B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2003011569A1 (en) * | 2001-07-31 | 2003-02-13 | Yoshino Kogyosho Co., Ltd. | Method of manufacturing bottle formed mainly of polyethylene terephthalate resin |
| JP2003039538A (en) * | 2001-07-31 | 2003-02-13 | Yoshino Kogyosho Co Ltd | Method for manufacturing bottle composed mainly of polyethylene terephthalate resin |
| US7485251B2 (en) | 2001-07-31 | 2009-02-03 | Yoshino Kogyosho Co., Ltd. | Method for producing bottle-shaped container mainly made of polyethylene terephthalate resin |
| CN102962983A (en) * | 2012-09-06 | 2013-03-13 | 林世鸿 | High energy-saving type full-automatic bottle blowing machine with external recovered gas storage tank |
| CN113459473A (en) * | 2020-03-30 | 2021-10-01 | Gea普洛克玛柯股份公司 | Apparatus and method for aseptically forming containers starting from parisons made of thermoplastic material |
| CN113459473B (en) * | 2020-03-30 | 2024-05-31 | Gea普洛克玛柯股份公司 | Apparatus and method for aseptically shaping containers starting from parisons made of thermoplastic material |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3843335B2 (en) | 2006-11-08 |
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