JPH0761674B2 - Plastic bottle manufacturing method - Google Patents

Plastic bottle manufacturing method

Info

Publication number
JPH0761674B2
JPH0761674B2 JP20794990A JP20794990A JPH0761674B2 JP H0761674 B2 JPH0761674 B2 JP H0761674B2 JP 20794990 A JP20794990 A JP 20794990A JP 20794990 A JP20794990 A JP 20794990A JP H0761674 B2 JPH0761674 B2 JP H0761674B2
Authority
JP
Japan
Prior art keywords
mold
plastic bottle
parison
bottle
label
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 - Fee Related
Application number
JP20794990A
Other languages
Japanese (ja)
Other versions
JPH0491924A (en
Inventor
徳生 林田
剛史 斉藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toppan Inc
Original Assignee
Toppan Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Toppan Inc filed Critical Toppan Inc
Priority to JP20794990A priority Critical patent/JPH0761674B2/en
Publication of JPH0491924A publication Critical patent/JPH0491924A/en
Publication of JPH0761674B2 publication Critical patent/JPH0761674B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/071—Preforms or parisons characterised by their configuration, e.g. geometry, dimensions or physical properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/0715—Preforms or parisons characterised by their configuration the preform having one end closed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/074—Preforms or parisons characterised by their configuration having ribs or protrusions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/074—Preforms or parisons characterised by their configuration having ribs or protrusions
    • B29C2949/0741—Preforms or parisons characterised by their configuration having ribs or protrusions longitudinal, e.g. from top to bottom
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/074—Preforms or parisons characterised by their configuration having ribs or protrusions
    • B29C2949/0746—Preforms or parisons characterised by their configuration having ribs or protrusions at body portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/07—Preforms or parisons characterised by their configuration
    • B29C2949/076—Preforms or parisons characterised by their configuration characterised by the shape
    • B29C2949/0768—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform
    • B29C2949/077—Preforms or parisons characterised by their configuration characterised by the shape characterised by the shape of specific parts of preform characterised by the neck
    • B29C2949/0772—Closure retaining means
    • B29C2949/0773—Threads
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/22—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at neck portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/24—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at flange portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/26—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at body portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C2949/00—Indexing scheme relating to blow-moulding
    • B29C2949/20—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer
    • B29C2949/28—Preforms or parisons whereby a specific part is made of only one component, e.g. only one layer at bottom portion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
    • B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
    • B29C49/06—Injection blow-moulding

Landscapes

  • Physics & Mathematics (AREA)
  • Geometry (AREA)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、ポリエチレンテレフタレート（以下PETと言
う）等の樹脂を素材とする有底筒状のパリソンを射出成
形によって成形し、この有底筒状のパリソンをダイレク
トあるいはコールドパリソンとした後加熱状態で成形用
金型内に挿入し、型締めし、延伸ブロー成形するプラス
チックボトルの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention relates to a bottomed tubular parison made of a resin such as polyethylene terephthalate (hereinafter referred to as PET) as a raw material, which is molded by injection molding. The present invention relates to a method for producing a plastic bottle, in which a parison of the shape is formed into a direct or cold parison, which is then inserted into a molding die in a heated state, clamped, and stretch blow molded.

＜従来技術＞ 従来、この種の延伸ブロー成形で飲料、油等の液体を充
填するプラスチックボトルを成形するときには、プラス
チックボトルの胴部形状を滑らかな曲面、例えば、断面
が円あるいは楕円等の形状にした場合、延伸した肉厚を
小さく成形するので強度的に弱くなり、特には座屈強度
の低下が著しい。この点を解決するためボトルの胴部に
補強用の凹凸を設ける必要があった。<Prior Art> Conventionally, when a plastic bottle filled with a liquid such as a beverage or oil is molded by this type of stretch blow molding, the body part of the plastic bottle has a smooth curved surface, for example, a cross section having a shape such as a circle or an ellipse. In the case of (1), since the stretched wall thickness is formed to be small, the strength is weakened, and particularly the buckling strength is significantly reduced. In order to solve this point, it was necessary to provide unevenness for reinforcement on the body of the bottle.

＜発明が解決しようとする課題＞ 上記のようなボトル胴部に凹凸を形成すると、 （１）金型を加工するとき複雑となりコスト高になる。<Problems to be Solved by the Invention> When unevenness is formed on the bottle body as described above, (1) the mold becomes complicated and the cost becomes high.

（２）ラベルの貼る位置が制限されてしまう。(2) The position where the label is attached is limited.

（３）金型内でラベルを一体化する場合にボトルとラベ
ルの間に気泡が残ってしまう。(3) When the label is integrated in the mold, air bubbles remain between the bottle and the label.

等の問題があり、金型の凹凸を形成することなく同様の
強度がえられるボトルの製造方法が望まれていた。Therefore, there is a demand for a method for producing a bottle that can achieve the same strength without forming irregularities on the mold.

＜課題を解決するための手段＞ 本発明は、上記課題を解決したものであって、射出成形
した有底筒状のパリソンを金型内で延伸ブロー成形する
プラスチックボトルの製造方法において、前記有底筒状
パリソンを縦方向に分割した筋状に他の部分より肉厚が
略1/2薄い部分を設け、この有底筒状パリソンを前記薄
い部分が他の部分より低温になるように温度調整し、こ
のパリソンを金型内に挿入し、次いで圧縮空気を吹き込
んでブロー成形することにより前記薄肉の部分が内側に
凸のリブになるようにしたプラスチックボトルの製造方
法を提供するものである。<Means for Solving the Problems> The present invention is for solving the above problems, and in the method for producing a plastic bottle, which comprises subjecting an injection-molded bottomed cylindrical parison to stretch blow molding in a mold, The bottom cylindrical parison is divided vertically into strips with a thickness that is approximately 1/2 thinner than the other parts, and this bottomed cylindrical parison is heated so that the thin part has a lower temperature than the other parts. The present invention provides a method for producing a plastic bottle in which the parison is adjusted and inserted into a mold, and then compressed air is blown into the mold to blow-mold it so that the thin-walled portion becomes a convex rib inward. .

＜作用＞ 上記肉薄部が他の部分より温度が低くなっているのでブ
ロー成形時に伸びず、他の部分は通常通り伸び、成形さ
れたボトルは表面が金型通りの面一の平滑面となると共
に、肉薄部が縦筋状の補強用リブとなる。<Function> Since the thin portion has a lower temperature than other portions, it does not stretch during blow molding, other portions stretch as usual, and the molded bottle has a surface that is flush with the mold. At the same time, the thin portion becomes a reinforcing rib having a vertical streak shape.

＜実施例＞ 以下、本発明を図面を用いて詳細に説明する。第１図は
本発明のプラスチックボトルの製造方法で使用するプリ
フォーム（１）であり、外観上は従来のプリフォームと
同じである。しかしながら本発明に使用するプリフォー
ムは第２図の断面図に示されるように縦方向筋状に数本
（本実施例では４本）の肉薄部（２）が形成され、他の
部分は肉厚部（３）として形成される。ここで、実施例
で成形するボトルとしては、内部料30cc,高さ170mm,胴
部の径80mm,胴部肉厚0.3〜0.4mmとした場合、プリフォ
ームとして高さ120mm,胴部の径25mmであって、肉薄部の
厚さ2.0mm,肉薄部の厚さ4.0mmで、肉薄部の幅２〜3mmと
することが好ましい。<Examples> Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 shows a preform (1) used in the method for producing a plastic bottle of the present invention, which is the same in appearance as a conventional preform. However, in the preform used in the present invention, as shown in the cross-sectional view of FIG. 2, several thin portions (2) (4 in this embodiment) are formed in the longitudinal streak shape, and the other portions are made of meat. It is formed as a thick part (3). Here, as the bottle molded in the example, when the internal material is 30 cc, the height is 170 mm, the body diameter is 80 mm, and the body wall thickness is 0.3 to 0.4 mm, the height is 120 mm as the preform, and the body diameter is 25 mm. It is preferable that the thin portion has a thickness of 2.0 mm, the thin portion has a thickness of 4.0 mm, and the thin portion has a width of 2 to 3 mm.

このプリフォームはホットパリソン法において、通常射
出時260〜280℃程度で作成され、金型内用液体温度を10
℃程度とし、冷却時間を10sec程度で行う。このように
すると前記肉薄部（２）は内部まで冷却されるが、肉厚
部（３）は表面は冷却されるが内部は冷却されない。In the hot parison method, this preform is usually made at a temperature of 260 to 280 ℃ during injection, and the temperature of the liquid in the mold is 10
The temperature is about ℃ and the cooling time is about 10 seconds. In this way, the thin portion (2) is cooled to the inside, but the thick portion (3) is cooled on the surface but not inside.

上記の如く調温されたプリフォーム（１）を通常の２軸
延伸ブロー成形方法で所望の形状に成形すると、第３図
の断面図に示すように、調温後放熱し易い肉薄部（２）
の温度は肉厚部（３）に比較してかなり低くなる。よっ
てボトル（11）のブロー成形時において肉薄部は殆んど
伸びず2mm程度の肉厚を保ち、内側に凸起となるリブ（2
1）となり、他の肉厚部（３）は伸びて0.3〜0.4mm程度
の厚さの胴壁部（31）となる。ここで上記胴壁部（31）
とリブ（21）の外側面は金型表面に沿った面一となって
いる。When the temperature-controlled preform (1) is molded into a desired shape by the ordinary biaxial stretch blow molding method, as shown in the cross-sectional view of FIG. )
The temperature of is considerably lower than that of the thick part (3). Therefore, at the time of blow molding of the bottle (11), the thin portion hardly expands and maintains a wall thickness of about 2 mm, and the rib (2
1), and the other thick part (3) extends to become the body wall part (31) having a thickness of about 0.3 to 0.4 mm. Where the body wall above (31)
The outer surface of the rib (21) is flush with the mold surface.

また、第４図は他の実施例を示すもので、これは一般的
にはインモールドラベル法と称されるもので、予め金型
内に装着されたラベル（10）を成形と同時にボトル（11
1）に一体化するもので、前記実施例と同様のプリフォ
ームを使用すれば肉薄部の部分が内側に凸のリブ（12
1）その他の肉厚部は胴壁部（131）となりしかも前記ラ
ベル（10）も表面が平滑の状態で一体化される。Further, FIG. 4 shows another embodiment, which is generally called the in-mold label method, in which the label (10) previously mounted in the mold is molded at the same time as the bottle ( 11
If a preform similar to that used in the above-described embodiment is used, the thin portion will have a rib (12
1) The other thick portions become the body wall portion (131), and the label (10) is also integrated with the surface being smooth.

＜効果＞ 本発明は上記の如き構成であって、従来の問題点を解消
でき、 （１）外観上の見栄えが良く、 （２）金型を加工する時、複雑にすることなく、内面リ
ブが形成されるので強度的にも優れいて、 （３）ラベルの貼る位置の制限がない、 （４）金型内で、ラベルを一体化する場合にもボトルと
ラベルの間に気泡が残らない、 等の実用上優れたボトルの製造方法を提供するものであ
る。<Effects> The present invention has the above-described configuration and can solve the problems of the related art. (1) The appearance is good, and (2) the internal ribs are processed without complicating the die. Since it is formed, it is also excellent in strength. (3) There is no restriction on the position to attach the label. (4) No bubbles remain between the bottle and the label even when the label is integrated in the mold. The present invention provides a method for producing bottles which is excellent in practical use such as.

【図面の簡単な説明】[Brief description of drawings]

第１図は本発明の実施例に使用するプリフォームの正面
図であり、第２図は第１図のＡ−Ａ断面図であり、第３
図はブロー成形時の断面説明図であり、第４図は他の実
施例のブロー成形時の断面説明図である。 （１）……プリフォーム、（２）……肉薄部 （３）……肉厚部、（11）……ボトル （21）……リブ、（31）……胴壁部1 is a front view of a preform used in an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG.
FIG. 4 is a sectional explanatory view at the time of blow molding, and FIG. 4 is a sectional explanatory view at the time of blow molding of another embodiment. (1) …… Preform, (2) …… Thin section (3) …… Thick section, (11) …… Bottle (21) …… Rib, (31) …… Body wall

Claims (1)

【特許請求の範囲】[Claims] 【請求項１】有底筒状のパリソンを金型内で延伸ブロー
成形するプラスチックボトルの製造方法において、前記
有底筒状のパリソンを縦方向に分割した筋状に他の部分
より肉厚が略1/2薄い部分を設け、この有底筒状のパリ
ソンを前記薄肉部が低温になるように温度調整し、この
パリソンを所望の金型内に挿入し、次いで圧縮空気を吹
き込んでブロー成形することにより、前記薄肉の部分が
内側に凸のリブになるようにしたプラスチックボトルの
製造方法。1. A method for producing a plastic bottle by stretch-blow-molding a bottomed tubular parison in a mold, wherein the bottomed tubular parison is divided into longitudinal streaks and has a wall thickness larger than other portions. Approximately 1/2 thin part is provided, the temperature of this bottomed cylindrical parison is adjusted so that the thin part becomes low temperature, this parison is inserted into the desired mold, and then compressed air is blown into it to blow mold By doing so, the method of manufacturing a plastic bottle, wherein the thin portion is a rib that is convex inward.
JP20794990A 1990-08-06 1990-08-06 Plastic bottle manufacturing method Expired - Fee Related JPH0761674B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20794990A JPH0761674B2 (en) 1990-08-06 1990-08-06 Plastic bottle manufacturing method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20794990A JPH0761674B2 (en) 1990-08-06 1990-08-06 Plastic bottle manufacturing method

Publications (2)

Publication Number Publication Date
JPH0491924A JPH0491924A (en) 1992-03-25
JPH0761674B2 true JPH0761674B2 (en) 1995-07-05

Family

ID=16548209

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20794990A Expired - Fee Related JPH0761674B2 (en) 1990-08-06 1990-08-06 Plastic bottle manufacturing method

Country Status (1)

Country Link
JP (1) JPH0761674B2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5631183B2 (en) * 2010-12-03 2014-11-26 ザ コカ・コーラ カンパニーＴｈｅ Ｃｏｃａ‐Ｃｏｌａ Ｃｏｍｐａｎｙ preform

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62168845A (en) * 1986-12-25 1987-07-25 株式会社吉野工業所 Biaxial-oriented synthetic resin bottle and manufacture thereof

Also Published As

Publication number Publication date
JPH0491924A (en) 1992-03-25

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