JPH05254000A - Blow molding device - Google Patents
Blow molding deviceInfo
- Publication number
- JPH05254000A JPH05254000A JP5790092A JP5790092A JPH05254000A JP H05254000 A JPH05254000 A JP H05254000A JP 5790092 A JP5790092 A JP 5790092A JP 5790092 A JP5790092 A JP 5790092A JP H05254000 A JPH05254000 A JP H05254000A
- Authority
- JP
- Japan
- Prior art keywords
- parison
- blow
- die
- molding
- cooling medium
- 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
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ブロー成形装置の改良
に関し、特に厚肉部を部分的に有する中空成形品をブロ
ー成形する装置に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improved blow molding apparatus, and more particularly to an apparatus for blow molding a hollow molded article having a thick portion partially.
【０００２】[0002]
【従来の技術】従来より、例えば自動車の座席を構成す
るシートバックフレーム等のように偏平な中空成形品を
ブロー成形する場合、円筒状のパリソンが成形型に挟ま
れた状態にてブロー流体により横方向に大きく伸ばされ
るため、成形された中空成形品の外周部分が薄くなる。
このように、中空成形品の外周部分に薄肉部が形成され
ると、特に中空成形品が自動車のシートバックフレーム
等である場合には外周部分が強度的に弱くなることか
ら、外周部分を逆に厚肉に形成したいという要望があ
る。2. Description of the Related Art Conventionally, when a flat hollow molded article such as a seat back frame constituting an automobile seat is blow-molded, a blow fluid is used in a state where a cylindrical parison is sandwiched between molding dies. Since it is greatly stretched in the lateral direction, the outer peripheral portion of the molded hollow molded product becomes thin.
In this way, when a thin-walled part is formed on the outer peripheral part of the hollow molded product, the outer peripheral part becomes weak in strength, especially when the hollow molded product is a seat back frame of an automobile, etc. There is a desire to form a thick wall.
【０００３】ところで、中空成形品をブロー成形する装
置として、例えば特開昭５９―２０１８２５号公報に開
示されているように、パリソンを押し出すダイに冷却ノ
ズルを設け、パリソンをダイから押し出す過程において
パリソンの伸び易い箇所の内面に向けて上記冷却ノズル
から冷却媒体を噴き付けることにより、パリソンの伸び
易い箇所を冷却して該箇所の伸びを抑えて薄肉になるの
を防止するようにしたブロー成形装置が提案されてい
る。By the way, as an apparatus for blow molding a hollow molded article, for example, as disclosed in Japanese Patent Laid-Open No. 59-201825, a die for extruding a parison is provided with a cooling nozzle, and the parison is extruded from the die. Of the parison is cooled by spraying a cooling medium from the cooling nozzle toward the inner surface of the stretchable part of the parison to cool the stretchable part of the parison and suppress the stretch of the part to prevent thinning of the blow molding device. Is proposed.
【０００４】そして、この提案例の技術を利用して中空
成形品の強度的に強くしたい箇所を厚肉に形成すること
が考えられる。Then, it is conceivable to use the technique of this proposed example to form a portion of the hollow molded article which is desired to have a strong strength in a thick wall.
【０００５】[0005]
【発明が解決しようとする課題】しかし、上記の提案例
のブロー成形装置では、既存の構成部品以外に別途冷却
ノズルを必要とするため、その分だけ設備費用が嵩むと
いう問題がある。また、パリソンを押し出す過程におい
て冷却ノズルから冷却媒体を噴き出すため、折角、パリ
ソンを部分的に冷却しても、パリソンを成形型で挟む
際、パリソンの冷却された箇所を成形型の適正な位置に
対応させることができ難く、厚肉部を目的とする位置に
正確に形成することができなくなる。However, in the blow molding apparatus of the above-mentioned proposed example, a cooling nozzle is required in addition to the existing components, so that there is a problem that the equipment cost increases accordingly. Also, since the cooling medium is ejected from the cooling nozzle in the process of pushing out the parison, even if the parison is partially cooled, when the parison is sandwiched between the molding dies, the cooled part of the parison is placed at the proper position of the molding die. It is difficult to make them correspond to each other, and it becomes impossible to accurately form the thick portion at a target position.
【０００６】本発明はかかる点に鑑みてなされたもので
あり、その目的とするところは、既存の構成部品を冷却
媒体噴出手段として有効に利用することにより、専用の
冷却媒体噴出手段の設置をなくして設備費用の低減化を
図るとともに、パリソンの冷却箇所を成形型に適正に位
置付けて厚肉部を目的とする位置に正確に形成せんとす
ることにある。The present invention has been made in view of the above points, and it is an object of the present invention to install a dedicated cooling medium jetting means by effectively utilizing existing components as the cooling medium jetting means. The purpose is to reduce the equipment cost by eliminating it, and to properly position the cooling part of the parison on the forming die to accurately form the thick portion at the intended position.
【０００７】[0007]
【課題を解決するための手段】上記の目的を達成するた
め、本発明の解決手段は、厚肉部を部分的に有する中空
成形品をブロー成形する装置において、円筒状のパリソ
ンを押し出すダイの下方に上記パリソンを型締め動作に
より両側から挟み付けるとともに、その内面に上記パリ
ソンを収容する成形空間が形成される成形型を設ける。
さらに、上記ダイから押し出されたパリソン内に相対的
に挿入され、上記成形型の成形空間内に収容されたパリ
ソン内部にブロー流体を吹き込み、該パリソンを上記成
形空間の内面に沿わせた状態で膨張させて所定形状の中
空成形品とするブローピンを上記ダイの下方に設ける。
また、パリソン押出し後でかつ上記ブロー流体吹込み前
段階において、中空成形品の厚肉部になるパリソン内面
に向けて冷却媒体を噴き付ける噴出口を上記ブローピン
に形成する構成とする。In order to achieve the above object, the solution of the present invention is to provide a die for extruding a cylindrical parison in an apparatus for blow-molding a hollow molded article having a thick portion partially. A molding die is provided below which sandwiches the parison from both sides by a mold clamping operation, and a molding space in which the parison is housed is formed on the inner surface thereof.
Further, the blow fluid is blown into the parison housed in the molding space of the mold, which is relatively inserted into the parison extruded from the die, and the parison is laid along the inner surface of the molding space. A blow pin, which is expanded to form a hollow molded product having a predetermined shape, is provided below the die.
Further, after the parison is extruded and before the blow fluid is blown, a jet port for jetting a cooling medium is formed in the blow pin toward the inner surface of the parison which becomes the thick wall portion of the hollow molded article.
【０００８】[0008]
【作用】上記の構成により、本発明では、円筒状のパリ
ソンがダイから押し出された後でかつ該パリソン内にブ
ロー流体を吹き込む前段階において、パリソン内に相対
的に挿入位置するブローピンに形成された噴出口から中
空成形品の厚肉部になるパリソン内面に向けて冷却媒体
が噴き付けられ、中空成形品の厚肉部になるパリソン内
面が冷却される。その後、成形型の型締め動作により上
記パリソンが両側から挟み付けられるとともに上記成形
型の成形空間に収容される。そして、上記ブローピンよ
りブロー流体がパリソン内部に吹き込まれ、上記パリソ
ンを上記成形空間の内面に沿わせた状態に膨張されて厚
肉部を部分的に有する所定形状の中空成形品がブロー成
形される。According to the present invention, according to the present invention, the cylindrical parison is formed on the blow pin relatively inserted into the parison after the cylindrical parison is extruded from the die and before the blowing fluid is blown into the parison. The cooling medium is jetted from the jet outlet toward the inner surface of the parison which becomes the thick portion of the hollow molded article, and the inner surface of the parison which becomes the thick portion of the hollow molded article is cooled. After that, the parison is clamped from both sides by the mold clamping operation of the molding die and is housed in the molding space of the molding die. Then, a blow fluid is blown into the parison from the blow pin, and the parison is expanded to a state along the inner surface of the molding space to blow-mold a hollow molded article having a predetermined shape partially having a thick portion. .
【０００９】このことから、既存のブローピンに噴出口
を形成するだけでよく専用の冷却媒体噴出手段が不要と
なってその分だけ設備費用の低減化が図られる。また、
パリソンを押し出した後につまりパリソンを成形型に位
置付けた状態でパリソン内面が冷却されることから、パ
リソンの冷却箇所が成形型に適正に位置付けられ、厚肉
部が目的とする位置に正確に形成される。From this, it is sufficient to form the jet port in the existing blow pin, and the dedicated cooling medium jetting means is not required, and the facility cost can be reduced accordingly. Also,
Since the inner surface of the parison is cooled after the parison is pushed out, that is, while the parison is positioned in the mold, the cooling point of the parison is properly positioned in the mold, and the thick part is accurately formed at the intended position. It
【００１０】[0010]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１１】図１は本発明の実施例に係るブロー成形装
置Ａを示す。該ブロー成形装置Ａは図示しない押出ヘッ
ドに装着されたダイ１を備えてなり、該ダイ１は押出機
から供給された樹脂原料を円筒状のパリソン３として押
し出すようになされている。FIG. 1 shows a blow molding apparatus A according to an embodiment of the present invention. The blow molding apparatus A comprises a die 1 mounted on an extrusion head (not shown), and the die 1 is adapted to extrude a resin raw material supplied from an extruder as a cylindrical parison 3.
【００１２】また、上記ダイ１の下方には、上方に延び
るブローピン５が昇降可能に配置され、該ブローピン５
は上記ダイ１から押し出されたパリソン３内に相対的に
挿入されて後述する噴出口１５，１５，…から内部にエ
ア等のブロー流体を吹き込み、パリソン３を所定形状に
膨らますようになされている。A blow pin 5 extending upward is arranged below the die 1 so as to be able to move up and down.
Is relatively inserted into the parison 3 extruded from the die 1 and blows a blow fluid such as air into the parison 3 from the jet outlets 15, 15 ,. .
【００１３】さらに、上記ダイ１の下方には、第１型７
と第２型９（図２〜図４に表われる）とからなる成形型
１１が横方向に型開きおよび型締め可能に配置され、パ
リソン３を上記成形型１１の型締め動作により両側から
挟み付けるとともに成形型１１の成形空間に上記パリソ
ン３を収容し、上記ブローピン５より吹き込まれるブロ
ー流体で上記パリソン３を上記成形空間の内面に沿わせ
た状態に膨張して所定形状の中空成形品１３（図４に表
われる）に成形するようになされている。Below the die 1, a first die 7 is provided.
And a second mold 9 (shown in FIGS. 2 to 4) are arranged so that the mold can be opened and clamped laterally, and the parison 3 is sandwiched from both sides by the mold clamping operation of the mold 11. The parison 3 is housed in the molding space of the molding die 11 and expanded by the blow fluid blown from the blow pin 5 so that the parison 3 extends along the inner surface of the molding space 13 and has a predetermined shape. It is designed to be molded (as shown in FIG. 4).
【００１４】また、本発明の特徴として、上記ブローピ
ン５には複数の噴出口１５，１５，…が形成され、パリ
ソン３押出し後でかつ上記成形型１１の型締め後のパリ
ソン３を成形型１１の内面に沿わせるブロー流体吹込み
前段階において、つまり、パリソン３が成形型１１の第
１型７と第２型９との間の所定位置（成形位置）に押し
出された状態で、図１および図２に示すように、パリソ
ン３内にブローピン５を挿入してその噴出口１５，１
５，…から中空成形品１３の厚肉部１３ａ，１３ａにな
るパリソン３内面に向けて水やアルコール等の冷却媒体
１７を噴き付けることにより、上記中空成形品１３の厚
肉部１３ａ，１３ａになるパリソン３内面を冷却し、そ
の後、上記パリソン３を成形型１１の型締め動作により
上記成形型１１の成形空間に収容し、ブローピン５から
パリソン３内にブロー流体を吹き込みパリソン３を膨張
させ、成形型１１の内面にパリソン３を沿わせることに
よって厚肉部１３ａ，１３ａを部分的に有する中空成形
品１３をブロー成形するようになされている。つまり、
上記ブローピン５は本来の機能であるブロー流体吹込み
機能のほかに冷却媒体噴出し機能をも合わせ持っている
ものである。Further, as a feature of the present invention, the blow pin 5 is formed with a plurality of jet outlets 15, 15, ... And the parison 3 after the parison 3 is extruded and after the mold 11 is clamped is molded into the mold 11. 1 before the blow fluid is blown along the inner surface of the mold, that is, in the state where the parison 3 is extruded to a predetermined position (molding position) between the first mold 7 and the second mold 9 of the molding die 11. And, as shown in FIG. 2, the blow pin 5 is inserted into the parison 3 and its spouts 15, 1 are formed.
By spraying a cooling medium 17 such as water or alcohol from 5 to the inner surface of the parison 3 that becomes the thick portions 13a, 13a of the hollow molded article 13, the thick portions 13a, 13a of the hollow molded article 13 are sprayed. The inner surface of the parison 3 is cooled, and then the parison 3 is housed in the molding space of the molding die 11 by the mold clamping operation of the molding die 11, and blow fluid is blown into the parison 3 from the blow pin 5 to expand the parison 3. The hollow molded article 13 partially having the thick portions 13a, 13a is blow-molded by placing the parison 3 on the inner surface of the molding die 11. That is,
The blow pin 5 has not only the original blow fluid blowing function but also a cooling medium jetting function.
【００１５】なお、１９，１９はプリブロー流体吹込み
の際に互いに接近してパリソン３の下端部を絞るプリピ
ンチである。Numerals 19 and 19 are pre-pinch for drawing the lower end of the parison 3 close to each other when the pre-blow fluid is blown.
【００１６】次に、上述の如く構成されたブロー成形装
置Ａにより中空成形品１３としてのシートバックフレー
ムを成形する要領について説明する。Next, the procedure for molding the seat back frame as the hollow molded article 13 by the blow molding apparatus A configured as described above will be described.
【００１７】まず、ダイ１からパリソン３を押し出し、
パリソン３が型開き状態の成形型１１の第１型７と第２
型９との間の正規の成形位置に位置すると押出しを停止
する。この状態におけるパリソン３と成形型１１との関
係を図１および図２に示す。First, push out the parison 3 from the die 1,
The first mold 7 and the second mold 11 of the mold 11 with the parison 3 opened.
When it is located at the regular molding position with respect to the mold 9, the extrusion is stopped. The relationship between the parison 3 and the molding die 11 in this state is shown in FIGS. 1 and 2.
【００１８】次いで、ブローピン５を上昇させてパリソ
ン３内に挿入し、その噴出口１５，１５，…を中空成形
品１３のシートバックフレームの外周部として厚肉部１
３ａ，１３ａになるパリソン３内面に対応させた後、上
記噴出口１５，１５，…から冷却媒体１７を中空成形品
１３の厚肉部１３ａ，１３ａになるパリソン３内面に向
けて噴き付け、該部分を冷却する。Then, the blow pin 5 is lifted and inserted into the parison 3, and its ejection ports 15, 15, ... Are used as the outer peripheral portion of the seat back frame of the hollow molded product 13 to form the thick wall portion 1.
3a, 13a corresponding to the inner surface of the parison 3 and then the cooling medium 17 is sprayed toward the inner surface of the parison 3 of the hollow molded article 13 from the jet holes 15, 15 ,. Cool part.
【００１９】その後、パリソン３の下端部をプリピンチ
１９，１９で絞り、ブローピン５の噴出口１５，１５，
…から今度はブロー流体を吹き込んでプリブローする。
これにより、パリソン３が図１仮想線および図３に示す
ように膨らみ、上記冷却媒体１７が噴き付けられたパリ
ソン３内面は冷却されて伸びが少なく厚肉部３ａ，３ａ
となる。After that, the lower end of the parison 3 is squeezed by the pre-pinch 19, 19 to blow the blow pin 5 with the jet ports 15, 15,
From this time, pre-blow by blowing blow fluid.
As a result, the parison 3 swells as shown in the phantom line in FIG. 1 and FIG. 3, and the inner surface of the parison 3 sprayed with the cooling medium 17 is cooled and the elongation is small and the thick portions 3a, 3a are formed.
Becomes
【００２０】しかる後、成形型１１を型締めし、成形型
１１の成形空間に上記パリソン３を収容し、パリソン３
内にさらにブロー流体を吹き込み、メインブローを行
い、上記パリソン３を成形空間内で膨張させて成形型１
１の内面に沿わせ、図４に示すように、厚肉部１３ａ，
１３ａが目的とする位置に正確に形成された中空成形品
１３をブロー成形する。これによって、外周部が厚肉部
１３ａ，１３ａによって補強された剛性の高いシートバ
ックフレームが得られる。Thereafter, the molding die 11 is clamped, the parison 3 is housed in the molding space of the molding die 11, and the parison 3
Blow fluid is further blown into the mold to perform main blow, and the parison 3 is expanded in the molding space to form the mold 1.
1 along the inner surface of the thick wall portion 13a, as shown in FIG.
Blow molding is performed on the hollow molded product 13 in which 13a is accurately formed at a desired position. As a result, a highly rigid seat back frame whose outer peripheral portion is reinforced by the thick portions 13a, 13a can be obtained.
【００２１】したがって、既存のブローピン５に噴出口
１５，１５，…を形成するだけで専用の冷却媒体噴出手
段を設けずともよいことから、その分だけ設備費用の低
減化を図ることができる。また、パリソン３を押し出し
た後につまりパリソン３を成形型１１に位置付けた状態
でパリソン３内面を冷却することから、パリソン３の冷
却箇所を成形型１１に適正に位置付けることができ、厚
肉部１３ａ，１３ａを目的とする位置に正確に形成する
ことができる。Therefore, it is not necessary to provide a dedicated cooling medium jetting means only by forming the jet outlets 15, 15, ... In the existing blow pin 5, so that the equipment cost can be reduced accordingly. Further, since the inner surface of the parison 3 is cooled after the parison 3 is pushed out, that is, in the state where the parison 3 is positioned on the molding die 11, the cooling portion of the parison 3 can be properly positioned on the molding die 11 and the thick portion 13a. , 13a can be accurately formed at a desired position.
【００２２】また、本実施例では、プリブローを行うブ
ロー成形装置でプリブローの前にブローピン５より冷却
媒体１７をパリソン内面に向けて噴き付ける例を示した
が、ブローピン５より冷却媒体１７を噴き付ける時期
は、最終的に成形型１１の内面にパリソン３を沿わせる
メインブロー前であればよく、プリブローの後であって
も、メインブローの前であればブローピン５より冷却媒
体１７をパリソン３内面に向けて噴き付けても良い、さ
らに、本発明は、プリブローを行わないブロー成形装置
にも適用できるものである。In this embodiment, the blow molding device for pre-blowing sprays the cooling medium 17 from the blow pin 5 toward the inner surface of the parison before the pre-blowing. However, the cooling medium 17 is sprayed from the blow pin 5. The timing may be before the main blow in which the parison 3 is finally routed along the inner surface of the molding die 11, and even after the pre-blow, before the main blow, the cooling medium 17 is fed from the blow pin 5 to the inner surface of the parison 3. Alternatively, the present invention can be applied to a blow molding device that does not perform pre-blowing.
【００２３】また、ブローピン５は、パリソン３内への
挿入方向を軸として回転可能に設けることにより、パリ
ソン３内面への冷却媒体１７の噴き付け位置を任意に設
定できるようにすることができる。Further, the blow pin 5 is rotatably provided with the insertion direction into the parison 3 as an axis, so that the spraying position of the cooling medium 17 onto the inner surface of the parison 3 can be arbitrarily set.
【００２４】[0024]
【発明の効果】以上説明したように、本発明によれば、
ダイから押し出されたパリソン内に相対的に挿入されて
内部にブロー流体を吹き込むブローピンに噴出口を形成
し、パリソン押出し後でかつブロー流体吹込み前段階に
おいて、中空成形品の厚肉部になるパリソン内面に向け
て上記噴出口から冷却媒体を噴き付けるようにしたの
で、専用の冷却媒体噴出手段を用いることなく冷却媒体
噴付け箇所の伸びを他の箇所よりも少なくできて厚肉部
を部分的に有する中空成形品を得ることができ、設備費
用の低減化を図ることができる。また、パリソンを成形
型に位置付けた状態でパリソン内面を冷却できるので、
厚肉部を目的とする位置に正確に形成することができ
る。As described above, according to the present invention,
A blowout port is formed in a blow pin that is inserted relatively into a parison extruded from a die and blows a blow fluid inside, and becomes a thick part of a hollow molded product after the parison is extruded and before the blow fluid is blown. Since the cooling medium is jetted from the jet port toward the inner surface of the parison, the expansion of the cooling medium jetting part can be made smaller than other places without using a dedicated cooling medium jetting means, and the thick part can be formed. It is possible to obtain a hollow molded article that has a general purpose, and it is possible to reduce the equipment cost. Also, since the inner surface of the parison can be cooled with the parison positioned in the mold,
The thick portion can be accurately formed at the intended position.
【図１】型開き状態の成形型に対してパリソンを押し出
した状態を一部破断して示す正面図である。FIG. 1 is a partially cutaway front view showing a state in which a parison is extruded to a molding die in an opened state.
【図２】図１のII−II線における断面図である。FIG. 2 is a sectional view taken along line II-II in FIG.
【図３】パリソンのプリブロー状態を示す図２相当図で
ある。FIG. 3 is a view corresponding to FIG. 2 showing a pre-blowing state of a parison.
【図４】中空成形品の成形状態を示す図２相当図であ
る。FIG. 4 is a view corresponding to FIG. 2 showing a molded state of a hollow molded product.
１ ダイ ３ パリソン ５ ブローピン １１ 成形型 １３ 中空成形品 １３ａ 厚肉部 １５ 噴出口 １７ 冷却媒体 Ａ ブロー成形装置 DESCRIPTION OF SYMBOLS 1 Die 3 Parison 5 Blow pin 11 Mold 13 Hollow molded product 13a Thick part 15 Jet port 17 Cooling medium A Blow molding device
フロントページの続き (71)出願人 000006057 三菱油化株式会社 東京都千代田区丸の内二丁目５番２号 (72)発明者 山根 孝文 広島市安佐北区可部南２丁目25番31号 西 川化成株式会社内 (72)発明者 原 正雄 広島県安芸郡府中町新地３番１号 マツダ 株式会社内 (72)発明者 藤 和久 広島県安芸郡府中町新地３番１号 マツダ 株式会社内 (72)発明者 赤澤 輝美 広島県安芸郡海田町国信１丁目６番25号 株式会社東洋シート広島工場内 (72)発明者 中森 和伸 三重県四日市市東邦町１番地 三菱油化株 式会社四日市総合研究所内 (72)発明者 内田 武行 三重県四日市市東邦町１番地 三菱油化株 式会社四日市総合研究所内Front page continuation (71) Applicant 000006057 Mitsubishi Petrochemical Co., Ltd. 2-5-2 Marunouchi, Chiyoda-ku, Tokyo (72) Takafumi Yamane 2-25-31 Kabe Minami, Asakita-ku, Hiroshima City Nishikawa Kasei Co., Ltd. (72) Inventor Masao Hara, 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture Mazda Co., Ltd. (72) Inventor, Kazuhisa Fuji, 3-1, Shinchi, Fuchu-cho, Aki-gun, Hiroshima Prefecture (72) Inventor Terumi Akazawa 1-6-25 Kuninobu, Kaita-cho, Aki-gun, Hiroshima Prefecture Toyo Seat Co., Ltd. Hiroshima Factory (72) Inventor Kazunobu Nakamori 1 Toho-cho, Yokkaichi-shi, Mie Mitsubishi Petrochemical Co., Ltd. Yokkaichi Research Institute ( 72) Inventor Takeyuki Uchida 1 Toho-cho, Yokkaichi-shi, Mie Mitsubishi Petrochemical Co., Ltd. Yokkaichi Research Institute
Claims (1)
ロー成形する装置であって、円筒状のパリソンを押し出
すダイと、該ダイの下方に設けられ、上記パリソンを型
締め動作により両側から挟み付けるとともに、その内面
に上記パリソンを収容する成形空間が形成される成形型
と、上記ダイの下方に設けられ、ダイから押し出された
パリソン内に相対的に挿入され、上記成形型の成形空間
内に収容されたパリソン内部にブロー流体を吹き込み、
該パリソンを上記成形空間の内面に沿わせた状態で膨張
させて所定形状の中空成形品とするブローピンとを備
え、該ブローピンには、パリソン押出し後でかつ上記ブ
ロー流体吹込み前段階において、中空成形品の厚肉部に
なるパリソン内面に向けて冷却媒体を噴き付ける噴出口
が形成されていることを特徴とするブロー成形装置。1. An apparatus for blow-molding a hollow-molded article partially having a thick portion, which comprises a die for extruding a cylindrical parison, and a die provided below the die for clamping the parison on both sides. And a molding die in which a molding space for accommodating the parison is formed on the inner surface of the molding die and the molding die, which is provided below the die and is relatively inserted into the parison extruded from the die to mold the molding die. Blow fluid is blown into the parison housed in the space,
A blow pin for expanding the parison along the inner surface of the molding space to form a hollow molded product having a predetermined shape, wherein the blow pin is hollow after the parison is extruded and before the blow fluid is blown. A blow molding device characterized in that an ejection port for ejecting a cooling medium is formed toward an inner surface of a parison which is a thick portion of a molded product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5790092A JP3129508B2 (en) | 1992-03-16 | 1992-03-16 | Blow molding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5790092A JP3129508B2 (en) | 1992-03-16 | 1992-03-16 | Blow molding equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05254000A true JPH05254000A (en) | 1993-10-05 |
| JP3129508B2 JP3129508B2 (en) | 2001-01-31 |
Family
ID=13068874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5790092A Expired - Fee Related JP3129508B2 (en) | 1992-03-16 | 1992-03-16 | Blow molding equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3129508B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018079080A1 (en) * | 2016-10-31 | 2018-05-03 | 株式会社吉野工業所 | Liquid blow molding apparatus and liquid blow molding method |
-
1992
- 1992-03-16 JP JP5790092A patent/JP3129508B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2018079080A1 (en) * | 2016-10-31 | 2018-05-03 | 株式会社吉野工業所 | Liquid blow molding apparatus and liquid blow molding method |
| CN109803807A (en) * | 2016-10-31 | 2019-05-24 | 株式会社吉野工业所 | Liquid blow molding apparatus and liquid blow molding method |
| US10933573B2 (en) | 2016-10-31 | 2021-03-02 | Yoshino Kogyosho Co., Ltd. | Liquid blow molding apparatus and liquid blow molding method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3129508B2 (en) | 2001-01-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2560418C2 (en) | Production of plastic article and blow mould to this end | |
| US6759003B1 (en) | Blow molding method, blow molded product and blow molding mold | |
| US3371376A (en) | Apparatus for the production of hollow objects with relatively wide openings | |
| US20040012126A1 (en) | Blow molding method and apparatus, and metallic mold apparatus and a needle blow nozzle | |
| US10022904B2 (en) | Blow molding process and apparatus | |
| JPH05254000A (en) | Blow molding device | |
| US7153466B2 (en) | Method and apparatus for blow-molding an article having a solid radially outwardly projecting flange | |
| KR20180053730A (en) | Manufacturing method of expanded molded article | |
| JP3179841B2 (en) | Blow molding equipment | |
| JP3129507B2 (en) | Blow molding method and molding apparatus | |
| JP2890353B2 (en) | Air spoiler molding method and molding die apparatus | |
| JPS58116135A (en) | Manufacture of synthetic resin molded item for vehicle | |
| JPS6151527B2 (en) | ||
| JP3063953B2 (en) | Blow molding method using expansion core | |
| JPH11170361A (en) | Method for molding synthetic resin molding | |
| JP3242033B2 (en) | Manufacturing method of resin container | |
| JPS63134220A (en) | Control method and device for blow molding machine | |
| JPH04173123A (en) | Blow-forming method of resin pipe | |
| JPH0592473A (en) | Blow molding method | |
| JPH06867A (en) | Method and apparatus for blow molding of resin molded product | |
| JP2606262Y2 (en) | Thin tube forming equipment | |
| JP2002172684A (en) | Method for in-mold cutting unnecessary part of hollow moldings | |
| US6916167B2 (en) | Method and apparatus for extrusion blow molding of shapes with an even wall thickness and varying radii | |
| JPH03278935A (en) | Method and apparatus for preparing flanged pipe made of synthetic resin and parison of the same pipe | |
| JPH0622854B2 (en) | Method for manufacturing blow molded product with partition plate |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20001010 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| S533 | Written request for registration of change of name |
Free format text: JAPANESE INTERMEDIATE CODE: R313533 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20071117 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081117 Year of fee payment: 8 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081117 Year of fee payment: 8 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081117 Year of fee payment: 8 |
|
| R360 | Written notification for declining of transfer of rights |
Free format text: JAPANESE INTERMEDIATE CODE: R360 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20081117 Year of fee payment: 8 |
|
| R370 | Written measure of declining of transfer procedure |
Free format text: JAPANESE INTERMEDIATE CODE: R370 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091117 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091117 Year of fee payment: 9 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313117 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20091117 Year of fee payment: 9 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| LAPS | Cancellation because of no payment of annual fees |