JPH0796257B2 - Method of manufacturing stretched blow bottle with handle - Google Patents
Method of manufacturing stretched blow bottle with handleInfo
- Publication number
- JPH0796257B2 JPH0796257B2 JP1228347A JP22834789A JPH0796257B2 JP H0796257 B2 JPH0796257 B2 JP H0796257B2 JP 1228347 A JP1228347 A JP 1228347A JP 22834789 A JP22834789 A JP 22834789A JP H0796257 B2 JPH0796257 B2 JP H0796257B2
- Authority
- JP
- Japan
- Prior art keywords
- blow
- handle
- preform
- bottle
- stretch
- 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.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/46—Knobs or handles, push-buttons, grips
- B29L2031/463—Grips, handles
Description
【発明の詳細な説明】 （イ）発明の目的 〔産業上の利用分野〕 本発明は、塩化ビニル樹脂からなる把手付き延伸ブロー
ボトルの製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (a) Object of the Invention [Field of Industrial Application] The present invention relates to a method for producing a stretch-blown bottle with a handle made of vinyl chloride resin.
近時、プラスチックの強度が向上して内容積の大きいプ
ラスチック製ボトルが使用され始めた為、持ち運びの容
易な把手付きボトルが求められている。Recently, as the strength of plastics has improved and plastic bottles with a large internal volume have begun to be used, a bottle with a handle that is easy to carry is required.
従来、把手付きプラスチック製ボトルは、代表的なボト
ル成形法の一つであるブロー成形法よれば、ダイレクト
ブロー成形法により次に示すような方法で製造されてい
た。Conventionally, a plastic bottle with a handle has been manufactured by a blow molding method, which is one of typical bottle molding methods, by a direct blow molding method as shown below.
すなわち、押出機から押出されてくる中空状パリソンに
底を設けると共に空気を吹き込みプリブローを得、該プ
リブローを把手穴の形成用の突起部を有する一対の半割
型のブロー用金型で挟み込み、ブローにより当該金型の
形状に膨張させて、把手穴となるべき部位が前記突起で
はさみ閉じられたボトルを得、次いで把手用の穴の内側
をくり抜くという方法が通常用いられていた。That is, a hollow parison that is extruded from the extruder is provided with a bottom and air is blown to obtain a pre-blow, and the pre-blow is sandwiched by a pair of half-die blow dies having protrusions for forming a handle hole, A method has been generally used in which the bottle is inflated into a shape of the mold by blowing to obtain a bottle in which a portion to be a handle hole is sandwiched and closed by the protrusion, and then the inside of the handle hole is hollowed out.
他方、最近ブロー成形の分野においては、ダイレクトブ
ロー成形法の他に、該成形法よりも力学的強度、透明性
およびガスバリァー性等に優れた成形品が得られる延伸
ブロー成形法が開発され実用化されている。On the other hand, in the field of blow molding recently, in addition to the direct blow molding method, a stretch blow molding method has been developed and put to practical use, which can obtain a molded product having mechanical strength, transparency, gas barrier properties and the like superior to the molding method. Has been done.
延伸ブロー成形法は、予備ブロー成形または射出成形さ
れたプリフォームを、ブロー用金型内において、樹脂の
ガラス転移温度以上であって融点ないし流動開始点未満
の温度条件下で、ストレッチピンによる縦方向への延伸
とブローによる横方向への延伸により延伸成形する方法
であり、上記延伸により、成形体素材の熱可塑性樹脂の
高分子鎖が分子配向するために、前記の如き優れた特性
を有する成形品が得られる。In the stretch blow molding method, a pre-blow-molded or injection-molded preform is vertically stretched with a stretch pin in a blow mold under a temperature condition that is higher than the glass transition temperature of the resin and lower than the melting point or the flow starting point. It is a method of stretch-molding by stretching in the direction and stretching in the transverse direction by blow, and by the above-mentioned stretching, since the polymer chains of the thermoplastic resin of the molded material are molecularly oriented, it has the above excellent properties. A molded product is obtained.
したがって、把手付きプラスチックボトルについても、
上記延伸ブロー成形法を適用したいという要望は出され
ていたが、延伸ブロー成形法においては前記のとおり、
ブロー用金型内におけるプリフォームの温度が、成形素
材の融点ないし流動開始点未満の温度であるため、前述
したダイレクトブロー成形法による把手付きボトルの製
造方法、すなわち把手用の穴を形成させるべき突起部を
有する一対の半割型の金型を用いる方法を適用しても、
口頚部を溶着させることが出来ないため、該口頚部の外
側に生じるばり部を切除すると、切除した跡が溶着して
おらず、使用可能なボトルを得ることは事実上不可能で
あった。Therefore, even for plastic bottles with handles,
Although there has been a demand to apply the stretch blow molding method, in the stretch blow molding method, as described above,
Since the temperature of the preform in the blow mold is lower than the melting point or flow starting point of the molding material, the method for producing a bottle with a handle by the above-mentioned direct blow molding method, that is, a hole for a handle should be formed. Even when applying the method of using a pair of mold halves having protrusions,
Since the mouth and neck cannot be welded, when the burrs formed on the outside of the mouth and neck are cut off, the cut marks are not welded and it is virtually impossible to obtain a usable bottle.
それ故、延伸ブロー成形法では、ダイレクトブロー成形
法において採用されている方法とは異なる把手部の形成
方法が提案されており、たとえばボトル本体と別途に成
形した把手を嵌合等の方法により、延伸ブロー成形され
たボトル本体に取りつけるという方法（特開昭63−1121
8号公報）等が代表的な例として知られている。Therefore, in the stretch blow molding method, a method of forming a handle portion different from the method adopted in the direct blow molding method has been proposed. For example, by a method such as fitting a bottle body and a handle separately molded, A method of attaching to a bottle body stretch-blow molded (Japanese Patent Laid-Open No. 63-1121).
No. 8) is known as a typical example.
しかしながら、上記方法によって得られる把手付き延伸
ブローボトルは、把手とボトルとが一つのプリフォーム
から一体成形されていないため、把手のボトル本体への
固定において信頼性に欠け易く、また製造工程も複雑に
なるという問題点を有している。However, the stretch-blown bottle with a handle obtained by the above method is not integrally molded from a single preform, so the handle is likely to lack reliability when fixed to the bottle body, and the manufacturing process is complicated. There is a problem that becomes.
本発明者らは、延伸ブロー成形法による把手付きブロー
ボトルの製造方法について検討を行い、可動型プラグす
なわち可動型の突起が装着されたブロー用金型を用い、
プリフォームから把手用の凹部を有する延伸ブローボト
ルを成形する過程において、プリフォームの体積が最終
体積の80％以上の大きさにまで膨張したとき、該金型に
装着された可動型プラグでプリフォームの把手用の穴と
なるべき部位を押しはさみ、把手用の穴に相当する形状
の凹部を有するボトルを得、ついで上記凹部の周縁部を
高周波誘電加熱により加熱溶着して密封した後に、該周
縁部の内側をくり抜くという把手付き延伸ブローボトル
の製造方法を提案している（特開昭63−222835号公
報）。The present inventors have examined a method of manufacturing a blow bottle with a handle by stretch blow molding, and used a movable mold plug, that is, a mold for blowing to which a movable mold protrusion is attached,
In the process of forming a stretch blow bottle having a recess for a handle from the preform, when the volume of the preform expands to 80% or more of the final volume, the movable plug attached to the mold pushes the plug. By pressing a portion of the reform to be a hole for a handle, a bottle having a recess having a shape corresponding to the hole for the handle is obtained, and then the peripheral portion of the recess is heat-welded and sealed by high frequency dielectric heating. A method for manufacturing a stretch-blown bottle with a handle by hollowing out the inside of the peripheral portion has been proposed (Japanese Patent Laid-Open No. 63-222835).
しかしながら上記提案の方法によっても、プラグで押し
伸ばされた部分すなわち把手部の穴に沿った部分の肉厚
が薄く、該部分の機械的強度は今一歩であった。However, even by the method proposed above, the thickness of the portion pushed out by the plug, that is, the portion along the hole of the handle portion is thin, and the mechanical strength of the portion is not good enough.
（ロ）発明の構成 〔課題を解決するための手段〕 本発明者らは、前記課題を解決するために鋭意検討した
結果、可動型プラグを有する延伸ブロー用金型を用い
て、プリフォームから把手用の凹部を有する延伸ブロー
ボトルを成形する際に、従来延伸ブロー法において行わ
れていた常温の空気による一次低圧ブローに代えて、15
0〜250℃の高温の空気による一次低圧ブローを使用し
て、プリフォームの内側の表層の温度を塩化ビニル樹脂
の溶融温度近傍にまで高め、かつ一次低圧ブローによっ
てプリフォームを最終体積の70％以上に膨らませた後
に、可動型プラグを作動させるという手段を採用するこ
とにより、得られる把手用の凹部を有する延伸ブローボ
トルによれば、次の工程で高周波誘電加熱により該凹部
の内側をくり抜くことにより、把手穴の接合部周辺の機
械的強度が極めて優れるボトルになることを見出し、本
発明を完成するに至った。(B) Configuration of the Invention [Means for Solving the Problems] The inventors of the present invention have conducted extensive studies to solve the above-mentioned problems, and as a result, using a stretching blow mold having a movable plug, When molding a stretch-blown bottle having a recess for a handle, instead of the primary low-pressure blow with air at room temperature, which was conventionally performed in the stretch-blowing method, 15
Using a primary low pressure blow with hot air at 0 to 250 ℃, raise the temperature of the surface layer inside the preform to near the melting temperature of vinyl chloride resin, and the primary low pressure blow makes the preform 70% of the final volume. According to the stretched blow bottle having the recess for the handle, which is obtained by activating the movable plug after inflating as described above, the inside of the recess can be hollowed out by high frequency dielectric heating in the next step. As a result, they have found that the bottle has extremely excellent mechanical strength around the joint portion of the handle hole, and completed the present invention.
すなわち、本発明は、下記工程〔Ｉ〕および工程〔II〕
からなることを特徴とする把手付き延伸ブローボトルの
製造方法である。That is, the present invention includes the following step [I] and step [II]
It is a manufacturing method of the stretch blow bottle with a handle characterized by comprising.
〔Ｉ〕対向する一対の可動型プラグを有するブロー用金
型を用いて、ストレッチピンによる延伸とブローとによ
りプリフォーム延伸ブロー成形する過程において、150
〜250℃の空気を用いる一次低圧ブローによってプリフ
ォームを最終体積の70％以上に膨張させた後、前記プラ
グを該プリフォームの肩部に押し込み、該プリフォーム
の肩部に把手用の凹部を形成し、その後一次ブローより
も低温の空気を用いる二次高圧ブローに切り換えて延伸
ブローボトルを成形する工程。[I] In the process of preform stretch blow molding by stretching and blowing with a stretch pin using a blow mold having a pair of movable mold plugs facing each other, 150
After expanding the preform to 70% or more of the final volume by a primary low pressure blow using air at ~ 250 ° C, the plug is pushed into the shoulder of the preform, and a recess for a handle is formed in the shoulder of the preform. Forming, and then switching to secondary high-pressure blow using air at a temperature lower than that of the primary blow to form a stretch blow bottle.
〔II〕高周波誘電加熱により、上記の把手用の凹部の周
縁部を加熱溶融した後、該凹部を挟んだ状態にある電極
を移動させて、前記周縁部を密封しその内側をくり抜く
工程。[II] A step of heating and melting the peripheral edge of the above-mentioned handle recess by high-frequency dielectric heating, and then moving the electrodes sandwiching the recess to seal the peripheral edge and hollow the inside.
以下、本発明について更に詳しく説明する。Hereinafter, the present invention will be described in more detail.
本発明における一次低圧ブロー用の空気の温度は、150
〜250℃であり、より好ましくは180〜230℃である。従
来の延伸ブロー成形法で一次低圧ブロー（以下単に一次
ブローという）に用いられていた20〜30℃の常温の空気
では勿論、150℃未満の空気では温度が低すぎ、得られ
る把手付きボトルにおける、把手部の穴の接合部周辺の
機械的強度が劣り、一方250℃を超える温度の空気で
は、塩化ビニル樹脂が熱分解する。一次ブローの空気圧
は、従来の延伸ブロー成形法における一次低圧ブローと
ほぼ同様で良く、1.5〜4kg/cm2が適当である。The temperature of the air for the primary low pressure blow in the present invention is 150
It is ~ 250 ° C, more preferably 180-230 ° C. In the conventional stretch blow molding method, the temperature is too low at the room temperature of 20 to 30 ° C, which was used for the primary low-pressure blow (hereinafter simply referred to as the primary blow), and the temperature of the air below 150 ° C is too low. , The mechanical strength around the joint of the hole of the handle is poor, while the vinyl chloride resin is thermally decomposed in the air having a temperature higher than 250 ° C. The air pressure of the primary blow may be almost the same as that of the primary low pressure blow in the conventional stretch blow molding method, and 1.5 to 4 kg / cm 2 is suitable.
また本発明においては、一次ブローを従来の延伸ブロー
成形法より長時間行い、一次ブローによってプリフォー
ムを最終体積の70％以上に、好ましくは70〜95％にまで
膨張させる。かかる体積にまでプリフォームを膨張させ
るための一次ブローの継続時間は、該ブロー用の空気圧
および目的とするボトルの容積に応じて決定され、たと
えば3.5kg/cm2の空気圧の一次ブローにより1.8リットル
程度のボトルを製造する場合には、２〜３秒程度が適当
である。Further, in the present invention, the primary blow is performed for a longer time than the conventional stretch blow molding method, and the preform is expanded to 70% or more of the final volume, preferably 70 to 95% of the final volume. The duration of the primary blow to expand the preform to such a volume is determined depending on the air pressure for the blow and the intended bottle volume, for example 1.8 liter by the primary blow of the air pressure of 3.5 kg / cm 2. When manufacturing a bottle of a certain degree, about 2 to 3 seconds is suitable.
可動型プラグによる把手用の凹部の形成は、一次ブロー
によってプリフォームが最終体積の70％以上に膨張させ
られた後に、金型に装着されたプラグをプリフォームの
肩部に押し込むことによってなされる。プリフォーム
は、通常一次ブロー開始後間もなく最終体積の70％以上
に膨張し、その際プリフォームの肩部周辺は、ほぼ金型
の内壁近傍にまで膨張しており、プラグの挿入により把
手用の凹部を形成させるのに適した状態にあるので、プ
ラグ作動時期は、一次ブロー開始直後が目安となる。The movable plug is used to form the handle recess by pushing the plug attached to the mold into the shoulder of the preform after the preform is expanded to 70% or more of the final volume by the primary blow. . The preform usually expands to 70% or more of the final volume shortly after the start of the primary blow, at which time the shoulder area of the preform expands almost to the vicinity of the inner wall of the mold, and the plug is inserted to handle it. Since it is in a state suitable for forming the concave portion, the plug operation timing is a guideline immediately after the start of the primary blow.
本発明においては、上記操作によってプリフォームに形
成される凹部において、相対する樹脂面が、該凹部の周
縁上において狭い幅で弱く溶着する。かかる周縁部での
溶着が、後に高周波誘電によって該周縁部の内側をくり
抜いて得られるボトルの把手部の接合部の機械的強度を
向上させることに寄与していると判断される。In the present invention, in the concave portion formed in the preform by the above operation, the opposing resin surfaces are weakly welded with a narrow width on the peripheral edge of the concave portion. It is considered that such welding at the peripheral portion contributes to improving the mechanical strength of the joint portion of the handle portion of the bottle obtained by hollowing out the inside of the peripheral portion by high frequency dielectric later.
一次ブローから低温空気の二次高圧ブロー（以下単に二
次ブローという）へ切り換える時点は、プリフォームが
最終体積の95％以上100％未満に達した時が好ましい。
二次ブローの空気温度は７〜10℃が好ましく、またその
圧力は８〜9kg/cm2が好ましい。The time of switching from the primary blow to the secondary high pressure blow of cold air (hereinafter simply referred to as secondary blow) is preferably when the preform reaches 95% or more and less than 100% of the final volume.
The air temperature of the secondary blow is preferably 7 to 10 ° C., and the pressure thereof is preferably 8 to 9 kg / cm 2 .
以下、添付図面を用いて、本発明の一態様を示す。Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.
第１図に示すように、プリフォーム１を油圧或いは空気
圧等により作動する、対向する一対のプラグ２を有する
ブロー用金型３（以下単に金型という）で挟み、次い
で、ストレッチピン４でプリフォーム１の底部を突き出
す。それと同時に又はその直後にブローピン５から一次
ブロー用空気を吹き込み、プリフォーム１を膨張させ
る。プリフォーム１の体積が金型３の内容積が70〜90％
に達したとき、第１図のＡ−Ａ′横断面を表す第２図の
ような状態に、プラグ２を押し込み、さらにプリフォー
ム１の体積が金型３の内容積の95％程度に達したとき一
次ブローから二次ブローに切り換えて、金型３内に第３
図の如き形状を有する延伸ブローボトル７を成形する。As shown in FIG. 1, the preform 1 is sandwiched between blow molds 3 (hereinafter simply referred to as molds) having a pair of opposed plugs 2 which are operated by hydraulic pressure or pneumatic pressure, and then stretched by stretch pins 4. Stick out the bottom of Reform 1. At the same time or immediately after that, primary blow air is blown from the blow pin 5 to expand the preform 1. The volume of the preform 1 is 70 to 90% of the inner volume of the mold 3.
When the plug 2 is reached, the plug 2 is pushed into the state shown in FIG. 2 showing the AA ′ cross section of FIG. 1, and the volume of the preform 1 reaches about 95% of the internal volume of the mold 3. Then, the primary blow is switched to the secondary blow, and the third blow is made in the mold 3.
A stretch blow bottle 7 having a shape as shown in the figure is molded.
斯くして得られたボトル７は、高周波誘電加熱により、
該ボトルに設けられた把手用の凹部６の内側をくり抜
く。The bottle 7 thus obtained is subjected to high-frequency dielectric heating,
The inside of the handle recess 6 provided in the bottle is hollowed out.
下記のような電極を有し、容量が3kw程度で周波数が40.
46MHz程度の高周波誘電加熱装置を使用して、第４図に
示すようにボトル７の凹部６の周縁部に一対の電極８を
押し当て、かかる状態で通常１〜４秒間通電し、該周縁
部を0.2〜2mm程度の幅で一周に渡り加熱溶融した後、通
常高周波を切り約１秒程度放冷させ、周縁部７における
樹脂が未だ溶融状態にある内に、ボトル７を挟んだ状態
で電極の一方を突き出し、同時にもう一方の電極を引く
ことにより、凹部６の内側をくり抜く。It has the following electrodes, the capacity is about 3kw and the frequency is 40.
Using a high frequency induction heating device of about 46 MHz, a pair of electrodes 8 are pressed against the peripheral edge of the recess 6 of the bottle 7 as shown in FIG. After heating and melting for about one round with a width of about 0.2 to 2 mm, the high frequency is usually cut off and allowed to cool for about 1 second, while the resin in the peripheral portion 7 is still in a molten state, the electrode with the bottle 7 sandwiched The inside of the recess 6 is hollowed out by protruding one of the electrodes and simultaneously pulling the other electrode.
高周波誘電加熱装置の電極材質としては、銅を主成分と
してベリリウムを0.4〜2.5重量％程度含むベリリウム−
銅合金が好ましく、その先端部の外周の大きさとして
は、凹部６の周縁部の周囲より僅かに小さいのが好まし
く、又、周縁部を0.2〜2mm程度の幅で一周に渡り加熱溶
融するために、電極面の外周近傍に設けられる加熱部分
が0.2〜2mm程度の幅で突起しているものが好ましく、特
にその幅を0.2〜0.4mm程度とすると、凹部６の内側のく
り抜きが容易になる。The electrode material of the high frequency induction heating device is beryllium containing copper as a main component and containing beryllium in an amount of 0.4 to 2.5% by weight.
A copper alloy is preferable, and the size of the outer circumference of the tip is preferably slightly smaller than the circumference of the peripheral edge of the recess 6, and the peripheral edge is heated and melted with a width of about 0.2 to 2 mm over the entire circumference. In addition, it is preferable that the heating portion provided in the vicinity of the outer periphery of the electrode surface is projected with a width of about 0.2 to 2 mm. Especially, if the width is set to about 0.2 to 0.4 mm, it is easy to hollow the inside of the recess 6. .
また電極は、使用時に45〜80℃程度の温度に維持される
ように、ヒーターを内蔵しているものが好ましい。Further, it is preferable that the electrode has a built-in heater so as to be maintained at a temperature of about 45 to 80 ° C. during use.
（ハ）発明の効果 高温の空気による一次ブローにより、プリフォームを最
終体積の70％以上に膨張させるという新規な手段を採用
する本発明によれば、ブロー成形の過程において、 低圧空気で比較的ゆっくりと最終体積付近にまで膨ら
まされるので、他の部位に先駆けて膨らみ始める把手部
となるべきプリフォームの肩部の肉厚が薄くなり難く、
また プリフォームの樹脂温度が高いため、把手用の凹部を
形成すべくプラグが押し込まれる際に、押される部分の
樹脂がプラグの動きに追随できる という利点が生じ、把手部の穴の接合部周辺の機械的強
度が極めて強いという優れた効果が奏される。(C) Effect of the Invention According to the present invention, which employs a novel means of expanding the preform to 70% or more of the final volume by primary blowing with hot air, according to the present invention, relatively low pressure air is used in the process of blow molding. Since it is slowly inflated to near the final volume, it is difficult for the thickness of the shoulder part of the preform, which should be the handle part that begins to inflate before other parts, to become thin,
Also, since the resin temperature of the preform is high, when the plug is pushed in to form the recess for the handle, there is the advantage that the resin in the pushed portion can follow the movement of the plug, around the joint part of the hole in the handle. The excellent effect that the mechanical strength of is extremely strong is exhibited.
さらに本発明によって得られる把手付きボトルは、延伸
ブローによる優れた物性を具備しているため、少ない目
付量でも機械的強度に優れ、かつ透明性およびガスバリ
ャー性も良好であり、各種内容物の長期保存に適してい
る。Further, the bottle with a handle obtained according to the present invention has excellent physical properties by stretch-blowing, and thus has excellent mechanical strength even with a small basis weight, and also has good transparency and gas barrier properties, and long-term use of various contents. Suitable for storage.
以下、実施例および比較例を示して、本発明をさらに具
体的に説明する。Hereinafter, the present invention will be described more specifically by showing Examples and Comparative Examples.
各例では、ポリ塩化ビニル系と下記コンパウンド71gを
目付け量として、内容積が1.8リットルのボトルを製造
する際に、それぞれ第１表に記載の条件の一次ブローを
採用した。In each of the examples, a primary blow under the conditions shown in Table 1 was adopted when producing a bottle having an internal volume of 1.8 liters, using a polyvinyl chloride type and 71 g of the following compound as a basis weight.
用いた成形機は、田原昭栄機工（株）製のストレッチハ
ンディボトル製造機TS−6034Lであり、原料は、スズ系
及びカルシウム／亜鉛系安定剤で安定化された重合度70
0のポリ塩化ビニル（以下PVCという）を主体とする市販
の吹き込み成形用PVCコンパウンド（アロンコンパウン
ドBL 2S8V1:東亞合成化学工業株式会社製）である。The molding machine used was a stretch handy bottle manufacturing machine TS-6034L manufactured by Tahara Shoei Kiko Co., Ltd., and the raw material was a polymerization degree 70 stabilized with tin-based and calcium / zinc-based stabilizers.
It is a commercially available blow molding PVC compound (Aron compound BL 2S8V1: manufactured by Toagosei Chemical Industry Co., Ltd.) mainly composed of polyvinyl chloride (hereinafter referred to as PVC) of 0.
なお一次ブロー用の空気の加熱は、内径50mmで長さ1.5m
の保温された鋼管の内部に、5kwのシーズヒータを挿入
した加熱装置によった。The air for primary blow is heated by an inner diameter of 50 mm and a length of 1.5 m.
The heating device was a 5 kw sheathed heater inserted inside the heat-insulated steel pipe.
各例において延伸ブロー成形された、把手用の凹部を有
するボトルは、高周波誘電加熱により該凹部の内側をく
り抜き、把手付き延伸ブローボトルに成形した後、第１
表下に内容を示した密封性試験を行った。その結果は、
一次ブローの条件と合わせて第１表に示した。In each of the examples, the bottle having the recess for the handle, which is stretch blow molded, is hollowed out by high frequency dielectric heating to form a stretch blow bottle with a handle, and then the first
A sealability test whose contents are shown below the table was conducted. The result is
It is shown in Table 1 together with the conditions of the primary blow.
第１図はプリフォーム１を挟み込んだ状態のプラグ２付
きの金型の縦断面図であり、第２図はプラグ２が押し込
まれた状態における第１図Ａ−Ａ′断面図であり、第３
図の〔１〕は延伸ブロー成形された凹部６を有するボト
ル７の正面図であり、第３図の〔２〕は同じボトルの断
面図であり、第４図はボトル７の凹部６を高周波誘電加
熱により加圧溶着する様子を示す模式図である。 １……プリフォーム、２……プラグ、３……ブロー金
型、４……ストレッチピン、５……ブローピン、６……
凹部、７……ボトル、８……電極FIG. 1 is a vertical cross-sectional view of a mold with a plug 2 in which a preform 1 is sandwiched, and FIG. 2 is a cross-sectional view of FIG. 1A-A ′ when the plug 2 is pushed in. Three
[1] of the drawing is a front view of a bottle 7 having a recess 6 formed by stretch blow molding, [2] of FIG. 3 is a sectional view of the same bottle, and FIG. It is a schematic diagram which shows a mode that pressure welding is carried out by dielectric heating. 1 ... Preform, 2 ... Plug, 3 ... Blow mold, 4 ... Stretch pin, 5 ... Blow pin, 6 ...
Recess, 7 ... Bottle, 8 ... Electrode
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｂ２９Ｌ 22:00 (72)発明者 内山 幹夫 東京都江戸川区北葛西１丁目17番22号 田 原昭栄機工株式会社内 審査官 菅谷 光雄 (56)参考文献 特開 昭63−222835（ＪＰ，Ａ) 特開 昭55−74840（ＪＰ，Ａ) 特開 昭57−59725（ＪＰ，Ａ)─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification number Reference number within the agency FI Technical display location B29L 22:00 (72) Inventor Mikio Uchiyama 1-17-22 Kitakasai, Edogawa-ku, Tokyo Tawara Examiner, Shoei Kiko Co., Ltd. Mitsuo Sugaya (56) References JP-A-63-222835 (JP, A) JP-A-55-74840 (JP, A) JP-A-57-59725 (JP, A)
Claims (1)
ことを特徴とする把手付き延伸ブローボトルの製造方
法。 〔Ｉ〕対向する一対の可動型プラグを有するブロー用金
型を用いて、ストレッチピンによる延伸とブローとによ
りプリフォームを延伸ブロー成形する過程において、15
0〜250℃の空気を用いる一次低圧ブローによってプリフ
ォームを最終体積の70％以上に膨張させた後、前記プラ
グを該プリフォームの肩部に押し込み、該プリフォーム
の肩部に把手用の凹部を形成し、その後一次低圧ブロー
よりも低温の空気を用いる二次高圧ブローに切り換えて
延伸ブローボトルを成形する工程。 〔II〕高周波誘電加熱により、上記の把手用の凹部の周
縁部を加熱溶融した後、該凹部を挟んだ状態にある電極
を移動させて、前記周縁部を密封しその内側をくり抜く
工程。1. A process for producing a stretch blow bottle with a handle, which comprises the following steps [I] and [II]. [I] In the process of stretch blow molding a preform by stretching with a stretch pin and blowing using a blow mold having a pair of movable mold plugs facing each other, 15
After expanding the preform to 70% or more of the final volume by primary low pressure blow using air at 0 to 250 ° C, the plug is pushed into the shoulder of the preform, and the shoulder of the preform is provided with a recess for a handle. And then switching to a secondary high pressure blow using air at a temperature lower than the primary low pressure blow to form a stretch blow bottle. [II] A step of heating and melting the peripheral portion of the above-mentioned recess for a handle by high-frequency dielectric heating, and then moving an electrode sandwiching the recess to seal the peripheral portion and hollow out the inside thereof.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1228347A JPH0796257B2 (en) | 1989-09-05 | 1989-09-05 | Method of manufacturing stretched blow bottle with handle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1228347A JPH0796257B2 (en) | 1989-09-05 | 1989-09-05 | Method of manufacturing stretched blow bottle with handle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0392326A JPH0392326A (en) | 1991-04-17 |
| JPH0796257B2 true JPH0796257B2 (en) | 1995-10-18 |
Family
ID=16875042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1228347A Expired - Lifetime JPH0796257B2 (en) | 1989-09-05 | 1989-09-05 | Method of manufacturing stretched blow bottle with handle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0796257B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3174375B2 (en) * | 1992-01-14 | 2001-06-11 | 株式会社吉野工業所 | Primary molded product of bottle with handle and method of molding bottle with handle |
| US6733716B2 (en) | 2001-05-21 | 2004-05-11 | Sabel Plastechs Inc. | Method of making a stretch/blow molded article (bottle) with an integral projection such as a handle |
| US7153455B2 (en) | 2001-05-21 | 2006-12-26 | Sabel Plastechs Inc. | Method of making a stretch/blow molded article (bottle) with an integral projection such as a handle |
| JP4389421B2 (en) * | 2001-09-28 | 2009-12-24 | 東洋製罐株式会社 | Handy bottle manufacturing method |
| KR100479685B1 (en) * | 2002-10-08 | 2005-03-31 | 동아정밀공업(주) | The receptacle P.E.T and equipment formation of handle receptacle P.E.T |
| JP2004155206A (en) * | 2004-02-05 | 2004-06-03 | Sahara Kagaku Kogyo Kk | Die for molding bottle for carbonated beverage |
| US9227357B2 (en) | 2011-03-29 | 2016-01-05 | Amcor Limited | Method of forming a container |
| KR101406300B1 (en) * | 2012-02-29 | 2014-06-12 | 김두연 | Equipment formation of handle receptacle p.e.t |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5574840A (en) * | 1978-12-01 | 1980-06-05 | Yoshino Kogyosho Co Ltd | Biaxial stretch blow moulding for polyethylene terephthalate resin bottle with handle |
| JPS5759725A (en) * | 1980-09-29 | 1982-04-10 | Toyo Seikan Kaisha Ltd | Polyester container with handle and preparation thereof |
| JPH0635150B2 (en) * | 1987-03-13 | 1994-05-11 | 東亞合成化学工業株式会社 | Method for producing stretch-blown plastic bottle with handle |
-
1989
- 1989-09-05 JP JP1228347A patent/JPH0796257B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0392326A (en) | 1991-04-17 |
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