JP2003103611A - Mold for stretch blow molding - Google Patents
Mold for stretch blow moldingInfo
- Publication number
- JP2003103611A JP2003103611A JP2001305139A JP2001305139A JP2003103611A JP 2003103611 A JP2003103611 A JP 2003103611A JP 2001305139 A JP2001305139 A JP 2001305139A JP 2001305139 A JP2001305139 A JP 2001305139A JP 2003103611 A JP2003103611 A JP 2003103611A
- Authority
- JP
- Japan
- Prior art keywords
- stretch blow
- blow molding
- temperature control
- mold
- preform
- 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
- Moulds For Moulding Plastics Or The Like (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、ホットパリソン法
の延伸ブロー成形機の温調工程に使用する金型に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mold used in a temperature control process of a stretch blow molding machine of a hot parison method.
【０００２】[0002]
【従来の技術】延伸ブロー成形法は、加圧空気をノズル
を通して可塑化されたプラスチック材料に吹き込み、中
空体をつくる成形法で、成形工程を大きく分けると、図
３に示すように、可塑化された材料でプリフォームと
呼ばれる管状物を予備成形する射出工程（１）、出来
上がったプリフォームの温度を調整する温調工程
（２）、温度調整したプリフォームを閉鎖した金型内
でノズルより加圧空気を吹き込み、延伸ブロー成形する
延伸ブロー工程（３）、延伸ブロー工程にて冷却固化
した製品を取り出す取り出し工程（４）、から成り立っ
ており、この順序を繰り返し連続して進行させる。2. Description of the Related Art The stretch blow molding method is a molding method in which pressurized air is blown into a plasticized plastic material through a nozzle to form a hollow body. When the molding process is roughly divided, as shown in FIG. Injection process (1) for preforming a tubular material called preform with the prepared material, temperature control process (2) for adjusting the temperature of the finished preform, nozzle from inside the mold with the temperature-controlled preform closed. The process comprises a stretch blow step (3) of blowing pressurized air and stretch blow molding, and a take-out step (4) of taking out the product cooled and solidified in the stretch blow step, and this sequence is repeated continuously.
【０００３】そして温調工程での金型の動きは、温調
コアシリンダー（１３）により温調ロッド（１１）が下
降して、プリフォーム（１２）に温調ロッド（１１）を
挿入する。温調コアシリンダー下降時間のタイマーが
切れ、温調ロッド（１１）が上昇し、プリフォーム（１
２）の温度調整が完了する（図１参照）。そして、この
順序を繰り返し連続して進行させている。In the movement of the mold in the temperature adjusting step, the temperature adjusting rod (11) is lowered by the temperature adjusting core cylinder (13) and the temperature adjusting rod (11) is inserted into the preform (12). The timer for the temperature control core cylinder descent time expires, the temperature control rod (11) rises, and the preform (1
The temperature adjustment of 2) is completed (see FIG. 1). Then, this sequence is repeatedly and continuously advanced.
【０００４】このように、温調ロッドがプリフォームに
均一に接触することにより射出工程での温度ムラを緩和
することができる。また、温調ロッドがプリフォームに
接触している部分は冷やされて延びにくくなり、温調ロ
ッドの非接触部分は延び易くなる。このことにより延ば
すプリフォーム表面を調整することができる。As described above, the temperature control rod is brought into uniform contact with the preform, whereby the temperature unevenness in the injection step can be alleviated. Further, the portion where the temperature control rod is in contact with the preform is cooled and becomes difficult to extend, and the non-contact portion of the temperature control rod is easily extended. This allows the surface of the preform to be stretched to be adjusted.
【０００５】ところで、温調ロッドのプリフォームとの
接触面は鏡面仕上げになっているため、適正温度条件の
範囲が６０〜７５°Ｃと狭く、この温度条件以外になる
とプリフォームが温調ロッドに食いついてしまうという
問題があった。By the way, since the contact surface of the temperature control rod with the preform is mirror-finished, the range of the proper temperature condition is as narrow as 60 to 75 ° C. Under other temperature conditions, the preform has the temperature control rod. There was a problem that I would eat.
【０００６】[0006]
【発明が解決しようとする課題】本発明は、ホットパリ
ソン法の延伸ブロー成形機での温調工程に使用する金型
に関する以上のような問題に鑑みてなされたもので、温
調工程に使用する成形温度条件範囲を拡げた延伸ブロー
成形用金型を提供することを課題とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above problems relating to a mold used in a temperature control process in a stretch blow molding machine of the hot parison method, and is used in the temperature control process. It is an object of the present invention to provide a mold for stretch blow molding in which the range of molding temperature conditions is expanded.
【０００７】[0007]
【課題を解決するための手段】本発明の請求項１の発明
は、ホットパリソン法延伸ブロー成形機の温調工程で使
用する延伸ブロー成形用金型であって、金型内の温調ロ
ッドのプリフォームとの接触面を粗面化したことを特徴
とする延伸ブロー成形用金型である。The invention according to claim 1 of the present invention relates to a stretch blow molding die used in a temperature adjusting step of a hot parison stretch blow molding machine, wherein the temperature adjusting rod is inside the die. Is a stretch blow molding die characterized in that the contact surface with the preform is roughened.
【０００８】また、請求項２の発明は、請求項１の発明
において、前記粗面化の程度が、＃３００〜＃５５０で
あることを特徴とする延伸ブロー成形用金型である。A second aspect of the present invention is the stretch blow molding die according to the first aspect of the invention, wherein the degree of roughening is # 300 to # 550.
【０００９】このように、温調ロッドのプリフォームと
の接触面を、好ましくは＃３００〜＃５００に粗面化し
てあるので、プリフォームが温調ロッドの表面に食いつ
きにくくなり、成形温度条件範囲が拡がる。なお、＃は
粗面化の程度を表す番手で、サンドペーパーなどの粗さ
と同様に数字が大きいと表面は細かくなる。As described above, since the contact surface of the temperature control rod with the preform is roughened preferably to # 300 to # 500, the preform is less likely to bite on the surface of the temperature control rod and the molding temperature condition is satisfied. The range expands. Note that # is a number indicating the degree of roughening, and the surface becomes finer if the number is large like roughness of sandpaper.
【００１０】[0010]
【発明の実施の形態】本発明の延伸ブロー成形用金型を
一実施形態に基づいて以下に詳細に説明する。温調工程
での金型の動きは、例えば、図１に示すように、温調コ
アシリンダー（１３）により温調ロッド（１１）が下降
して、プリフォーム（１２）に温調ロッド（１１）が挿
入される。温調コアシリンダー（１３）下降時間のタイ
マーが切れると、温調ロッド（１１）はプリフォーム
（１２）から離れて上昇し、プリフォーム（１２）の温
度調整が完了する。この動作を繰り返すことによりプリ
フォームの温度調整が行われる。BEST MODE FOR CARRYING OUT THE INVENTION The stretch blow molding die of the present invention will be described below in detail based on one embodiment. For example, as shown in FIG. 1, the movement of the mold in the temperature control step is performed by lowering the temperature control rod (11) by the temperature control core cylinder (13) to move the temperature control rod (11) to the preform (12). ) Is inserted. When the timer for the descent time of the temperature control core cylinder (13) expires, the temperature control rod (11) rises apart from the preform (12) and the temperature control of the preform (12) is completed. By repeating this operation, the temperature of the preform is adjusted.
【００１１】ここで、温調ロッド（１１）のプリフォー
ム（１２）が接触する表面は、加熱されたプリフォーム
の樹脂が温調ロッドの表面に付着しないように、温調ロ
ッドの表面を粗面化しておく（図２参照）。Here, the surface of the temperature control rod (11) with which the preform (12) comes in contact is roughened so that the resin of the heated preform does not adhere to the surface of the temperature control rod. It is surfaced (see FIG. 2).
【００１２】温調ロッドのプリフォームが接触する表面
を粗面化することにより、温調ロッドとプリフォームと
の摩擦が小さくなりすべりが良くなる。このことによっ
て、温調ロッドへのプリフォームの食いつきを防止する
ことができた。従って、設定の条件幅が大きくなり、温
調ロッドの温度幅が大きくなった。よってプリフォーム
の温度と温調ロッドの温度との差を大きくつけてプリフ
ォームの抜けにくい部分を抜け易くすることができる。
従って、成形可能な形状の拡大を期待することができ
る。By roughening the surface of the temperature control rod that comes into contact with the preform, the friction between the temperature control rod and the preform is reduced and slippage is improved. As a result, it was possible to prevent the preform from sticking to the temperature control rod. Therefore, the range of setting conditions is increased, and the temperature range of the temperature control rod is increased. Therefore, it is possible to increase the difference between the temperature of the preform and the temperature of the temperature control rod to facilitate the removal of the hard-to-remove portion of the preform.
Therefore, it is possible to expect expansion of the shape that can be molded.
【００１３】温調ロッド表面の粗面化の程度は、＃３０
０〜５５０で、また、表面を粗面化する手段は、鉱石な
どの粉体を吹き付けるミクロブラスト機による方法が一
般的で、このほか、放電加工、シボ加工などが採用でき
る。The degree of surface roughening of the temperature control rod is # 30.
The method for roughening the surface is generally 0 to 550, and the method for roughening the surface is generally a method using a microblast machine for spraying powder such as ore, and in addition to this, electric discharge machining, graining, etc. can be adopted.
【００１４】[0014]
【発明の効果】上記のように、本発明の延伸ブロー成形
用金型を使用することにより成形条件幅を拡大すること
ができる。また、成形可能形状の拡大も期待できる。As described above, the range of molding conditions can be expanded by using the stretch blow molding die of the present invention. In addition, expansion of moldable shape can be expected.
【図１】本発明の一実施例を示す、延伸ブロー成形機の
温調工程での金型の状態を示す説明図である。FIG. 1 is an explanatory view showing a state of a mold in a temperature control process of a stretch blow molding machine showing an embodiment of the present invention.
【図２】図１に示す、温調ロッドの部分断面説明図であ
る。FIG. 2 is a partial cross-sectional explanatory view of the temperature control rod shown in FIG.
【図３】延伸ブロー成形法の成形工程の概要を示す工程
説明図である。FIG. 3 is a process explanatory view showing an outline of a molding process of a stretch blow molding method.
１‥‥射出工程 ２‥‥温調工程 ３‥‥延伸ブロー工程 ４‥‥取り出し工程 １０‥‥延伸ブロー金型 １１‥‥温調ロッド １１ａ‥表面が粗面化された温調ロッド １２‥‥プリフォーム １３‥‥温調コアシリンダー 1 ... Injection process 2 ... Temperature control process 3 ... Stretching blow process 4 ... Taking out process 10 Draw blow mold 11 ... Temperature control rod 11a ... Temperature control rod with roughened surface 12 ... Preform 13 Temperature control core cylinder
Claims (2)
工程で使用する延伸ブロー成形用金型であって、 金型内の温調ロッドのプリフォームとの接触面を粗面化
したことを特徴とする、延伸ブロー成形用金型。1. A stretch blow molding mold used in a temperature control step of a hot parison stretch blow molding machine, wherein a contact surface of a temperature control rod in the mold with a preform is roughened. A characteristic mold for stretch blow molding.
であることを特徴とする、請求項１記載の延伸ブロー成
形用金型。2. The degree of roughening is # 300 to # 550.
The mold for stretch blow molding according to claim 1, wherein
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001305139A JP3797177B2 (en) | 2001-10-01 | 2001-10-01 | Stretch blow molding machine and temperature control rod used therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001305139A JP3797177B2 (en) | 2001-10-01 | 2001-10-01 | Stretch blow molding machine and temperature control rod used therefor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003103611A true JP2003103611A (en) | 2003-04-09 |
| JP3797177B2 JP3797177B2 (en) | 2006-07-12 |
Family
ID=19124971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001305139A Expired - Lifetime JP3797177B2 (en) | 2001-10-01 | 2001-10-01 | Stretch blow molding machine and temperature control rod used therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3797177B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120100237A1 (en) * | 2008-10-02 | 2012-04-26 | Kevin Folger | Quick-change system for stretching rods |
| JP2021008295A (en) * | 2019-06-28 | 2021-01-28 | 株式会社吉野工業所 | Flat bottle and manufacturing method of the same |
-
2001
- 2001-10-01 JP JP2001305139A patent/JP3797177B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120100237A1 (en) * | 2008-10-02 | 2012-04-26 | Kevin Folger | Quick-change system for stretching rods |
| JP2021008295A (en) * | 2019-06-28 | 2021-01-28 | 株式会社吉野工業所 | Flat bottle and manufacturing method of the same |
| JP7278890B2 (en) | 2019-06-28 | 2023-05-22 | 株式会社吉野工業所 | Flat bottle and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3797177B2 (en) | 2006-07-12 |
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