JPH11333911A - Production of two-layer preform - Google Patents
Production of two-layer preformInfo
- Publication number
- JPH11333911A JPH11333911A JP10143349A JP14334998A JPH11333911A JP H11333911 A JPH11333911 A JP H11333911A JP 10143349 A JP10143349 A JP 10143349A JP 14334998 A JP14334998 A JP 14334998A JP H11333911 A JPH11333911 A JP H11333911A
- Authority
- JP
- Japan
- Prior art keywords
- insert piece
- mold
- preform
- gate
- flange
- 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
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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/07—Preforms or parisons characterised by their configuration
- B29C2949/081—Specified dimensions, e.g. values or ranges
- B29C2949/0811—Wall thickness
- B29C2949/0816—Wall thickness of the flange
-
- 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
- B29C2949/081—Specified dimensions, e.g. values or ranges
- B29C2949/082—Diameter
- B29C2949/0825—Diameter of the flange
-
- 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
- B29C2949/28—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
- B29C2949/00—Indexing scheme relating to blow-moulding
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3012—Preforms or parisons made of several components at flange portion
- B29C2949/3014—Preforms or parisons made of several components at flange portion partially
-
- 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
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3016—Preforms or parisons made of several components 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
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/302—Preforms or parisons made of several components at bottom portion
- B29C2949/3022—Preforms or parisons made of several components at bottom portion partially
-
- 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
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3024—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique
- B29C2949/3026—Preforms or parisons made of several components characterised by the number of components or by the manufacturing technique having two or more components
-
- 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
- B29C2949/30—Preforms or parisons made of several components
- B29C2949/3032—Preforms or parisons made of several components having components being injected
- B29C2949/3034—Preforms or parisons made of several components having components being injected having two or more components being injected
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、２軸延伸ブロー成
形に使用する２層プリフォームの製造方法に関するもの
である。The present invention relates to a method for producing a two-layer preform used for biaxial stretch blow molding.
【０００２】[0002]
【従来の技術】従来、２軸延伸ブロー成形ボトルに用途
に応じた特性を付与するために、２層プリフォームを用
いることが知られているが、この２層プリフォームを製
造する方法としては、プリフォーム本体（２００）の樹
脂の特性と異なる特性を有する円筒スリーブ状のインサ
ートピース（１００）を、図２（ａ）に示すように、キ
ャビティ型（３２０）内に前もって挿着して成形する
か、又は、図２（ｂ）に示すように、コア型（３１０）
に挿着して成形していた。2. Description of the Related Art Conventionally, it has been known to use a two-layer preform in order to give a biaxial stretch blow-molded bottle characteristics according to the intended use. As shown in FIG. 2A, a cylindrical sleeve-shaped insert piece (100) having a property different from that of the resin of the preform body (200) is previously inserted into a cavity mold (320) and molded. Or the core type (310) as shown in FIG.
And was molded.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上述の
従来の２層プリフォームの製造方法においては、円筒ス
リーブ状のインサートピースを前もって型に挿着すると
きに、適正な位置決めが難しかったり、フランジ部や底
部などのボトル成形時に延伸されにくい部分にインサー
トピースがなく、ボトルへの特性付与が不十分であった
り、また、プリフォームを延伸ロッドで延伸するとき
に、インサートピースとプリフォーム本体とにずれを生
じて界面剥離を生じ易いことなどがあった。However, in the above-mentioned conventional method for manufacturing a two-layer preform, when the cylindrical sleeve-shaped insert piece is inserted into the mold in advance, it is difficult to properly position the insert piece, or the flange portion is not provided. There is no insert piece in the part that is difficult to stretch when forming the bottle, such as the bottom and the bottom, and the properties are not sufficiently imparted to the bottle. In some cases, the interface was easily separated due to displacement.
【０００４】本発明は、上述の従来の２層プリフォーム
の製造方法における問題を解決したものであり、型内の
適正な位置にインサートピースを挿着し易く、２軸延伸
ブロー成形したボトルの特性が良好であり、また、延伸
時にインサートピースが界面剥離を発生しにくい２層プ
リフォームの製造方法を提供するものである。The present invention solves the above-mentioned problems in the conventional method for manufacturing a two-layer preform, and it is easy to insert an insert piece into a proper position in a mold. An object of the present invention is to provide a method for producing a two-layer preform having good properties and in which the insert piece is less likely to cause interfacial peeling during stretching.
【０００５】[0005]
【課題を解決するための手段】すなわち、本発明の第１
の発明は、外層用インサートピースを射出成形用金型内
に前もって挿着して、２軸延伸ブロー成形用プリフォー
ムを製造する方法において、前記インサートピース（１
００）の形状が、図１に示すように、上端開口部にフラ
ンジ部（１０１）を形成し、下端底部にゲート用貫通孔
（１０２）を有することを特徴とする２層プリフォーム
の製造方法である。That is, the first aspect of the present invention is as follows.
The present invention provides a method of manufacturing a preform for biaxial stretch blow molding by previously inserting an insert piece for an outer layer into a mold for injection molding.
As shown in FIG. 1, a method of manufacturing a two-layer preform is characterized in that a flange portion (101) is formed at an upper end opening and a gate through hole (102) is formed at a lower end bottom. It is.
【０００６】そして、本発明の第２の発明は、前記射出
成形用金型（３００）が、図１に示すように、コア型
（３１０）とキャビティ型（３２０）とネック部割型
（３３０）とからなり、前記インサートピース（１０
０）のフランジ部（１０１）の厚みをａとし、前記ネッ
ク部割型のフランジ部（３３１）の最低深さをＡとする
と、Ａ＋0.05mm≧ａ≧Ａ−0.30mmであり、前記インサー
トピースのフランジ部（１０１）の径をｂとし、前記ネ
ック部割型のフランジ部（３３１）の径をＢとすると、
Ｂ≧ｂ≧Ｂ−0.60mmであり、且つ、前記インサートピー
スのゲート用貫通孔（１０２）の径をｃとすると、12.0
0mm ≧ｃ≧3.00mmであることを特徴とする第１の発明に
記載の２層プリフォームの製造方法である。According to a second aspect of the present invention, as shown in FIG. 1, the injection mold (300) comprises a core mold (310), a cavity mold (320), and a neck part mold (330). ), And the insert piece (10)
Assuming that the thickness of the flange portion (101) of 0) is a and the minimum depth of the flange portion (331) of the neck split mold is A, A + 0.05 mm ≧ a ≧ A−0.30 mm, and the insert piece Let b be the diameter of the flange portion (101), and B be the diameter of the flange portion (331) of the neck split type.
If B ≧ b ≧ B−0.60 mm, and the diameter of the gate through hole (102) of the insert piece is c, 12.0
The method for producing a two-layer preform according to the first invention, wherein 0 mm ≧ c ≧ 3.00 mm.
【０００７】[0007]
【作用】本発明の製造方法おいては、外層用インサート
ピースの上端開口部にフランジ部を形成しており、この
フランジ部をキャビティ型の上面に掛けて金型内に挿着
するため、インサートピースの金型内への挿着が一般の
インサーターを使用しても容易にでき、また、型締めし
たときに、ネック部割型によりしっかりと押さえて位置
決めするため、インサートピースを型内の適正な位置に
挿着することができる。In the manufacturing method of the present invention, a flange is formed at the upper end opening of the outer layer insert piece, and the flange is hung on the upper surface of the cavity mold and inserted into the mold. The insert can be easily inserted into the mold using a general inserter.In addition, when the mold is clamped, the insert is placed firmly in the neck split mold to position it. It can be inserted at an appropriate position.
【０００８】また、本発明の製造方法においては、上端
開口部にフランジ部をもち、下端にゲート用貫通孔をも
つ底部を有する外層用インサートピースを用いて２層プ
リフォームを製造するため、この２層プリフォームを２
軸延伸ブロー成形して製造されたボトルは、フランジ部
や底部の延伸されにくい部分にも、特性を付与するため
のインサートピースがあるので、ボトルの特性が良好で
ある。In the manufacturing method of the present invention, a two-layer preform is manufactured by using an outer layer insert piece having a flange at an upper end opening and a bottom having a through hole for a gate at a lower end. 2 layers preform
A bottle manufactured by axial stretch blow molding has good insert characteristics even in the flange portion and the bottom portion, which are difficult to be stretched, because there is an insert piece for imparting characteristics.
【０００９】さらに、本発明の製造方法で作製された２
層プリフォームは、２軸延伸ブロー成形工程で加熱さ
れ、延伸ロッドをプリフォームの底部に当てて延伸する
ときに、インサートされている外層インサートピースに
もフランジと底部とがあるため、インサートピースがプ
リフォーム本体と一緒に延伸ロッドで延伸され、インサ
ートピースがプリフォーム本体から界面剥離することが
ない。[0009] Furthermore, 2 prepared by the manufacturing method of the present invention.
The layer preform is heated in a biaxial stretch blow molding process, and when the stretch rod is stretched against the bottom of the preform, the inserted outer layer insert piece also has a flange and a bottom, so the insert piece is The insert piece is stretched together with the preform body by the stretching rod, and the insert piece does not peel off at the interface from the preform body.
【００１０】[0010]
【発明の実施の形態】本発明の２層プリフォームの製造
方法は、図１に示すように、必要な特性を付与するため
の外層用インサートピース（１００）を射出成形用金型
（３００）内に前もって挿着し、プリフォーム本体（２
００）の熱溶融する結晶性の熱可塑性樹脂、例えばポリ
エチレンテレフタレート、ポリエチレンイソフタレート
を含むポリエチレンテレフタレート、ポリプロピレン、
ポリエチレンなどを射出して、２軸延伸ブロー成形用プ
リフォーム（１０）を製造する方法である。この得られ
た２層プリフォームは、加温され、延伸ロッドで縦方向
に延伸され、ブロー成形されて、本体樹脂の特性とイン
サートピースの特性とを兼ね備えた２層ボトルとなる。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIG. 1, in a method for manufacturing a two-layer preform of the present invention, an outer layer insert piece (100) for imparting necessary characteristics is injection molded (300). Into the preform body (2
00) a heat-meltable crystalline thermoplastic resin such as polyethylene terephthalate, polyethylene terephthalate including polyethylene isophthalate, polypropylene,
This is a method for producing a preform (10) for biaxial stretch blow molding by injecting polyethylene or the like. The obtained two-layer preform is heated, stretched in the longitudinal direction with a stretching rod, and blow-molded to form a two-layer bottle having both the properties of the main resin and the properties of the insert piece.
【００１１】次に、本発明の２層プリフォームの製造方
法に用いられる一実施形態の外層用インサートピース
（１００）は、例えば図１に示すように、上端開口部に
フランジ部（１０１）を形成し、下端底部にプリフォー
ム本体の熱溶融樹脂が通るゲート用貫通孔（１０２）を
有するものであり、通常、ハイバリヤ性を有するナイロ
ン、エチレン−ビニルアルコール、ポリアクリロニトリ
ル、ポリエチレンナフタレートなどの熱可塑性樹脂を用
いて射出成形法により作製するものである。なお、本実
施形態のインサートピースを金型内に挿着する方法は、
インサートピースのフランジ部をキャビティ型の上面に
掛けて挿着し、型締めしたときに、ネック部割型により
しっかりと押さえて所定位置に位置決めするものであ
る。Next, as shown in FIG. 1, for example, an outer layer insert piece (100) used in the method for manufacturing a two-layer preform of the present invention has a flange portion (101) at an upper end opening. It has a through hole (102) for a gate formed at the bottom of the lower end and through which the hot melt resin of the preform main body passes. It is produced by an injection molding method using a plastic resin. The method of inserting the insert piece of the present embodiment into the mold is as follows.
When the flange portion of the insert piece is hung on the upper surface of the cavity mold and inserted, and when the mold is clamped, it is firmly pressed by the neck split mold and positioned at a predetermined position.
【００１２】そして、プリフォームを製造する射出成形
用金型（３００）は、通常、図１に示すように、コア型
（３１０）とキャビティ型（３２０）とネック部割型
（３３０）とから構成されており、インサートピース
（１００）のフランジ部（１０１）の厚みをａは、ネッ
ク部割型のフランジ部（３３１）の最低深さ（Ａ）とす
ると、Ａ＋0.05mm≧ａ≧Ａ−0.30mmの範囲にし、インサ
ートピースのフランジ部（１０１）の径をｂは、ネック
部割型のフランジ部（３３１）の径（Ｂ）とすると、Ｂ
≧ｂ≧Ｂ−0.60mmの範囲にし、また、インサートピース
のゲート用貫通孔（１０２）の径（ｃ）は、12.00mm ≧
ｃ≧3.00mmの範囲にするものである。これは、ａ＞Ａ＋
0.05mm及びｂ＞Ｂでは、型締め時の圧縮限界を越え、ａ
＜Ａ−0.30mm及びｂ＜Ｂ−0.60mmでは、射出時にインサ
ートピースが移動し、また、ｃは、ゲート径で決まり、
3.00mm径が樹脂の流動限界であり、12.00mm 径が樹脂の
充填限界である。なお、インサートピースの厚みは、通
常では、0.50mm〜3.00mmの範囲で作製するものである。As shown in FIG. 1, the injection molding die (300) for producing a preform usually comprises a core die (310), a cavity die (320) and a neck split die (330). Assuming that the thickness a of the flange portion (101) of the insert piece (100) is the minimum depth (A) of the flange portion (331) of the split neck portion, A + 0.05 mm ≧ a ≧ A− When the diameter of the flange portion (101) of the insert piece is b and the diameter (B) of the flange portion (331) of the split neck portion is B,
≧ b ≧ B−0.60 mm, and the diameter (c) of the gate through hole (102) of the insert piece is 12.00 mm ≧
The range is c ≧ 3.00 mm. This is because a> A +
At 0.05 mm and b> B, the compression limit at the time of mold clamping is exceeded and a
For <A−0.30 mm and b <B−0.60 mm, the insert piece moves during injection, and c is determined by the gate diameter,
The 3.00 mm diameter is the flow limit of the resin, and the 12.00 mm diameter is the filling limit of the resin. In addition, the thickness of the insert piece is usually manufactured in a range of 0.50 mm to 3.00 mm.
【００１３】[0013]
【発明の効果】本発明の２層プリフォームの製造方法に
よると、インサートピースの形状から型内の適正な位置
にインサートピースを挿着し易く、一般のインサーター
を用いてインサートピースの型内への挿着ができ、ま
た、延伸時にインサートピースとプリフォーム本体との
界面剥離がなく、プリフォームの製造における生産性が
安定している。そして、このプリフォームを２軸延伸ブ
ロー成形して得られたボトルは、フランジ部や底部など
の延伸されにくい部分にもインサートピースがインサー
トされているため、ボトルの特性が良好である。According to the method for manufacturing a two-layer preform of the present invention, the insert piece can be easily inserted into an appropriate position in the mold based on the shape of the insert piece, and the insert piece can be easily inserted into the mold using a general inserter. And the interfacing between the insert piece and the preform body does not occur at the time of stretching, and the productivity in the production of the preform is stable. The bottle obtained by biaxially stretch-blow-molding this preform has good bottle characteristics because the insert piece is inserted into a portion that is not easily stretched, such as a flange portion and a bottom portion.
【図１】本発明の２層プリフォームの製造方法の一実施
形態におけるインサートピースの形状、金型内の挿着位
置、及び２層プリフォームの構成を示す説明図である。FIG. 1 is an explanatory view showing a shape of an insert piece, an insertion position in a mold, and a configuration of a two-layer preform in one embodiment of a method for manufacturing a two-layer preform of the present invention.
【図２】（ａ）は、従来の一例の２層プリフォームの製
造方法におけるインサートピースの形状、金型内の挿着
位置、及び２層プリフォームの構成を示す説明図であ
り、（ｂ）は、従来の他の一例の２層プリフォームの製
造方法におけるインサートピースの形状、金型内の挿着
位置、及び２層プリフォームの構成を示す説明図であ
る。FIG. 2A is an explanatory view showing a shape of an insert piece, an insertion position in a mold, and a configuration of a two-layer preform in a conventional example of a method for manufacturing a two-layer preform, and FIG. 4) is an explanatory view showing the shape of the insert piece, the insertion position in the mold, and the configuration of the two-layer preform in another example of the conventional two-layer preform manufacturing method.
１０……プリフォーム １００……インサートピース １０１，２３１……フランジ部 １０２……ゲート用貫通孔 ２００……プリフォーム本体 ３００……射出成形用金型 ３１０……コア型 ３２０……キャビティ型 ３３０……ネック部割型 ３２１……ゲート ａ……インサートピースのフランジ部の厚み Ａ……ネック部割型のフランジ部の最低深さ ｂ……インサートピースのフランジ部の径 Ｂ……ネック部割型のフランジ部の径 ｃ……インサートピースのゲート用貫通孔の径 10 Preform 100 Insert piece 101,231 Flange 102 Gate through hole 200 Preform body 300 Injection mold 310 Core mold 320 Cavity mold 330 ... Neck split type 321 ... Gate a ... Thickness of flange of insert piece A ... Minimum depth of flange of split neck b ... Diameter of flange of insert piece B ... Neck split type Diameter of flange part of c ... Diameter of through hole for gate of insert piece
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ２９Ｌ 22:00 ──────────────────────────────────────────────────の Continued on front page (51) Int.Cl. 6 Identification code FI B29L 22:00
Claims (2)
内に前もって挿着して、２軸延伸ブロー成形用プリフォ
ームを製造する方法において、前記インサートピースの
形状が、上端開口部にフランジ部を形成し、下端底部に
ゲート用貫通孔を有することを特徴とする２層プリフォ
ームの製造方法。1. A method for manufacturing a preform for biaxial stretch blow molding by previously inserting an insert piece for an outer layer into a mold for injection molding, wherein the shape of the insert piece is a flange portion at an upper end opening. And forming a through hole for a gate at the bottom of the lower end.
ィ型とネック部割型とからなり、前記インサートピース
のフランジ部の厚みをａとし、前記ネック部割型のフラ
ンジ部の最低深さをＡとすると、Ａ＋0.05mm≧ａ≧Ａ−
0.30mmであり、前記インサートピースのフランジ部の径
をｂとし、前記ネック部割型のフランジ部の径をＢとす
ると、Ｂ≧ｂ≧Ｂ−0.60mmであり、且つ、前記インサー
トピースのゲート用貫通孔の径をｃとすると、12.00mm
≧ｃ≧3.00mmであることを特徴とする請求項１記載の２
層プリフォームの製造方法。2. The injection mold comprises a core mold, a cavity mold and a neck split mold, wherein the thickness of the flange of the insert piece is a, and the minimum depth of the flange of the neck split mold is Assuming that A is A + 0.05 mm ≧ a ≧ A−
0.30 mm, the diameter of the flange portion of the insert piece is b, and the diameter of the flange portion of the split neck portion is B, B ≧ b ≧ B−0.60 mm, and the gate of the insert piece If the diameter of the through hole is c, 12.00mm
2. The method according to claim 1, wherein ≧ c ≧ 3.00 mm.
Manufacturing method of layer preform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14334998A JP3765183B2 (en) | 1998-05-25 | 1998-05-25 | Method for producing two-layer preform |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14334998A JP3765183B2 (en) | 1998-05-25 | 1998-05-25 | Method for producing two-layer preform |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11333911A true JPH11333911A (en) | 1999-12-07 |
| JP3765183B2 JP3765183B2 (en) | 2006-04-12 |
Family
ID=15336733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14334998A Expired - Fee Related JP3765183B2 (en) | 1998-05-25 | 1998-05-25 | Method for producing two-layer preform |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3765183B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002326275A (en) * | 2001-04-27 | 2002-11-12 | Toppan Printing Co Ltd | Method for producing two-layer preform |
| JP2002361716A (en) * | 2001-06-08 | 2002-12-18 | Toppan Printing Co Ltd | Method for manufacturing two-layered preform |
| JP2006263948A (en) * | 2005-03-22 | 2006-10-05 | Dainippon Printing Co Ltd | Preform of bottle container made of plastic and bottle container manufactured therefrom |
| JP2016112806A (en) * | 2014-12-16 | 2016-06-23 | 大日本印刷株式会社 | Manufacturing method of composite container, and composite container |
| JP2019116283A (en) * | 2017-12-26 | 2019-07-18 | 株式会社吉野工業所 | Synthetic resin container |
-
1998
- 1998-05-25 JP JP14334998A patent/JP3765183B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002326275A (en) * | 2001-04-27 | 2002-11-12 | Toppan Printing Co Ltd | Method for producing two-layer preform |
| JP2002361716A (en) * | 2001-06-08 | 2002-12-18 | Toppan Printing Co Ltd | Method for manufacturing two-layered preform |
| JP2006263948A (en) * | 2005-03-22 | 2006-10-05 | Dainippon Printing Co Ltd | Preform of bottle container made of plastic and bottle container manufactured therefrom |
| JP2016112806A (en) * | 2014-12-16 | 2016-06-23 | 大日本印刷株式会社 | Manufacturing method of composite container, and composite container |
| JP2019116283A (en) * | 2017-12-26 | 2019-07-18 | 株式会社吉野工業所 | Synthetic resin container |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3765183B2 (en) | 2006-04-12 |
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