JP2007030224A - Preform for blow molding - Google Patents

Preform for blow molding Download PDF

Info

Publication number
JP2007030224A
JP2007030224A JP2005213221A JP2005213221A JP2007030224A JP 2007030224 A JP2007030224 A JP 2007030224A JP 2005213221 A JP2005213221 A JP 2005213221A JP 2005213221 A JP2005213221 A JP 2005213221A JP 2007030224 A JP2007030224 A JP 2007030224A
Authority
JP
Japan
Prior art keywords
preform
blow
mouth
blow molding
core
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
Application number
JP2005213221A
Other languages
Japanese (ja)
Other versions
JP4684038B2 (en
Inventor
Noriyuki Tanaka
則之 田中
Takao Iizuka
高雄 飯塚
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.)
Yoshino Kogyosho Co Ltd
Original Assignee
Yoshino Kogyosho Co Ltd
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 Yoshino Kogyosho Co Ltd filed Critical Yoshino Kogyosho Co Ltd
Priority to JP2005213221A priority Critical patent/JP4684038B2/en
Publication of JP2007030224A publication Critical patent/JP2007030224A/en
Application granted granted Critical
Publication of JP4684038B2 publication Critical patent/JP4684038B2/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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
    • B29C2949/20—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
    • 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
    • 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

Landscapes

  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a preform for blow molding capable of avoiding the deformation of a mouth part. <P>SOLUTION: In the preform 2 for blow molding comprising the mouth part 2b having an inner wall 2a fitted to its outer periphery by pushing the preform 2 in a blow core 1 and the body part 2c connected to the mouth part 2b and demarcating and forming the internal space of a container and including an annular protruded part 2d provided to the lower end of the outer surface of the mouth part 2b, the seal part 2e coming into contact with the outer periphery of the blow core 1 accompanied by the pushing-in of the preform 2 is provided at the position where the annular protruded part 2d is present. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、ブロー成形用プリフォームに関し、とくに口径の大きな容器をブロー成形する際に生じがちな口径の拡大や口部の変形（真円度の劣化）を確実に防止しようとするものである。   The present invention relates to a preform for blow molding, and in particular, intends to surely prevent the enlargement of the diameter and the deformation of the mouth (deterioration of roundness) that tend to occur when a container having a large diameter is blow-molded. .

ペットボトルのような合成樹脂製の容器は、射出形成や押し出し成形によって作製された試験管状のプリフォームを素材にして、その口部を成形装置のブローコアに適合させ内部にエアーを吹き込むことで所望の外観形状を有する容器に仕上げられるていたが、口径の大きな容器を成形するに際しては、吹き込みにかかるエアーの圧力で口部が外側に向けて変形する傾向にあって（その傾向は口径が大きくなるほど顕著）、口径の大きな容器をブロー成形するに当たっては、口径の精度をいかに安定化させるかが重要な課題になっていた。   A synthetic resin container such as a plastic bottle is made by using a test tubular preform made by injection molding or extrusion molding, and fitting its mouth to the blow core of the molding device and blowing air into it. However, when molding a large-diameter container, the mouth part tends to be deformed outward by the pressure of air applied to the air (the tendency is that the caliber is large). In order to blow-mold a container having a large diameter, how to stabilize the precision of the diameter has become an important issue.

ブロー成形されたボトルの口部内周縁の品質劣化に係わる先行技術としては、開放端部の内周面上端部を拡径して、天面と交差する一定高さを有する拡径面を形成したブロー成形用プリフォームが知られている（例えば、特許文献１参照）。
特開2002−347730号公報 As a prior art related to the quality deterioration of the inner peripheral edge of the mouth of the blow molded bottle, the diameter of the upper end of the inner peripheral surface of the open end is expanded to form an expanded surface having a certain height intersecting the top surface. Blow molding preforms are known (for example, see Patent Document 1).
JP 2002-347730 A

本発明の課題は、口径の大きな容器をブロー成形するに際しても口径の精度を安定的に維持できる新規なブロー成形用プリフォームを提案するところにある。   An object of the present invention is to propose a novel preform for blow molding that can stably maintain the accuracy of the diameter even when blow-molding a container having a large diameter.

本発明は、ブローコアへの押し込みにてその外周に適合させる内壁を有する口部と、この口部につながり容器の内部空間を区画形成する胴部とからなり、該口部の外面下端に環状凸部を備えたブロー成形用プリフォームであって、
前記口部の内壁で、かつ、該環状凸部が存在する位置に、該プリフォームの押し込みに伴ってブローのコアの外周に当接するシール部を有することを特徴とするブロー成形用プリフォームである。 The present invention comprises a mouth portion having an inner wall adapted to the outer periphery thereof by being pushed into the blow core, and a body portion that is connected to the mouth portion to form an internal space of the container, and has an annular convex at the lower end of the outer surface of the mouth portion. A preform for blow molding with a portion,
A blow molding preform characterized in that it has a seal part that comes into contact with the outer periphery of the blow core as the preform is pushed in at the position of the inner wall of the mouth part and the annular convex part. is there.

上記の構成になるプリフォームにおいて前記シール部の当接幅は、0.3〜0.8mmとするのが好ましく、0.3〜0.5mmとするのがより望ましい。また、シール部の傾斜角度については、10〜45°とするのが好ましい。   In the preform configured as described above, the contact width of the seal portion is preferably 0.3 to 0.8 mm, and more preferably 0.3 to 0.5 mm. Further, the inclination angle of the seal portion is preferably 10 to 45 °.

口部の外面下端に環状凸部を形成しないプリフォームにあっては、シール部は口部と胴部の境界部分に設けることができる。   In the preform in which the annular convex portion is not formed at the lower end of the outer surface of the mouth portion, the seal portion can be provided at the boundary portion between the mouth portion and the trunk portion.

ブローコアへの押し込みに際して、該ブローコアに対して当接するシール部をプリフォームに形成しておくと、ブロー成形に係わるエアーは胴部の成形に全て費やされることとなり口径の拡大や口部が変形するのを防止することができる。   When the preform is formed with a seal portion that comes into contact with the blow core when it is pushed into the blow core, the air related to the blow molding is all spent for the molding of the body portion, and the diameter is enlarged and the mouth portion is deformed. Can be prevented.

以下、図面を参照して本発明をより具体的に説明する。
図１は本発明に従うブロー成形用プリフォームの実施の形態をブローコアに装着した状態で示したものである。 Hereinafter, the present invention will be described more specifically with reference to the drawings.
FIG. 1 shows an embodiment of a blow molding preform according to the present invention in a state where it is mounted on a blow core.

図において番号１はブロー成形装置の一部分をなすブローコアである。このブローコア１にはプリフォーム内へエアーを供給するための通路1aが設けられている。   In the figure, reference numeral 1 denotes a blow core forming a part of the blow molding apparatus. The blow core 1 is provided with a passage 1a for supplying air into the preform.

また、２はプリフォームである。プリフォーム２はブローコア１への押し込みにてその外周に適合させる内壁2aを有する口部2bと、この口部2bにつながり容器の内部空間を区画形成する胴部2cとからなっており、口部2bの外面下端（口部2bと胴部2cの境界近傍）には環状凸部2dが一体的に形成され、口部2bの内壁の、該環状凸部2dが存在する位置にはプリフォームの押し込みに伴ってブローコア１の段部1bに当接する面をもったシール部2e形成されている。   Reference numeral 2 denotes a preform. The preform 2 is composed of a mouth portion 2b having an inner wall 2a adapted to the outer periphery of the blow core 1 by being pushed into the blow core 1, and a body portion 2c connected to the mouth portion 2b to form an internal space of the container. An annular convex portion 2d is integrally formed at the lower end of the outer surface of 2b (near the boundary between the mouth portion 2b and the body portion 2c), and the preform 2d is located on the inner wall of the mouth portion 2b at the position where the annular convex portion 2d exists. A seal portion 2e having a surface that comes into contact with the stepped portion 1b of the blow core 1 as it is pushed in is formed.

上記のような構成になるプリフォーム２では、シール部2eとブローコア１の段部1bが面接触するため、その部位で確実なシールがなされ、口部2bの口径の精度が損なわれるのを防止することができる。   In the preform 2 configured as described above, the seal portion 2e and the stepped portion 1b of the blow core 1 are in surface contact with each other, so that a reliable seal is made at that portion and the accuracy of the diameter of the mouth portion 2b is prevented from being impaired. can do.

シール部2eを環状凸部2dが存在する位置に設けると、例えば、ブロー成形に際してプリフォーム２のその部位が径方向に押し広げられても該環状凸部2dの先端部がブローコア１の側壁1cに突き当たることになる（該環状凸部2dをストッパーとして機能させる）ので、口径の拡大あるいは口部2bの変形がより確実に回避される。   When the seal portion 2e is provided at a position where the annular convex portion 2d exists, for example, even if the portion of the preform 2 is radially expanded during blow molding, the tip portion of the annular convex portion 2d is the side wall 1c of the blow core 1. (The annular convex portion 2d functions as a stopper), the enlargement of the diameter or the deformation of the mouth portion 2b can be avoided more reliably.

環状凸部2dを有しないプリフォーム２においてはその外面をストレート部として口部2bと胴部2cの境界部分にシール部2eを設けておくのがよい。   In the preform 2 that does not have the annular convex portion 2d, it is preferable to provide a seal portion 2e at the boundary between the mouth portion 2b and the body portion 2c with the outer surface as a straight portion.

ブロー成形に際して生じる口部2bの変形は、口部内径がブロー成形容器の胴部最大内径に対して大きくなるほど顕著であるが、かかるプリフォーム２を用いたブロー成形では口部2bの口径の精度が損なわれるのが防止される。   The deformation of the mouth 2b that occurs during blow molding becomes more significant as the mouth inner diameter becomes larger than the maximum inner diameter of the body of the blow-molded container. However, in blow molding using such a preform 2, the accuracy of the mouth 2b diameter is increased. Is prevented from being damaged.

シール部2eの当接幅ｔは、図２(a)(b)に示すように接触面が傾斜しているかどうかに係わりなくその直線距離で表されるものであり、0.3〜0.8mm（より好ましくは0.3〜0.5mm）とする。その理由は、0.3mm未満ではシール性が悪くる一方、0.8mmを超えるとプリフォーム２を射出成形する際の成形性が劣るとともに、中栓やポンプシリンダーの装着性が悪くなるからである。   The contact width t of the seal portion 2e is expressed by the linear distance regardless of whether the contact surface is inclined as shown in FIGS. 2 (a) and 2 (b), and is 0.3 to 0.8 mm (more Preferably, it is 0.3 to 0.5 mm. The reason is that if the thickness is less than 0.3 mm, the sealing performance is poor, while if it exceeds 0.8 mm, the moldability when the preform 2 is injection-molded is inferior, and the inner plug and the pump cylinder are not easily mounted.

シール部2eの傾斜角度αは、図２(b)に示す角度で表されるものであって、10〜45°とするのが好ましい。その理由は、傾斜角度αが10°未満では、プリフォーム２を射出形成する際の成形性が劣るからであり、45°を超えるとシール性が悪くなるからである。   The inclination angle α of the seal portion 2e is represented by the angle shown in FIG. 2B, and is preferably 10 to 45 °. The reason is that if the inclination angle α is less than 10 °, the moldability when the preform 2 is injection-molded is inferior, and if it exceeds 45 °, the sealing property is deteriorated.

プリフォーム２はポリエチレンテレフタレート等の合成樹脂にて作製されるが、樹脂の種類はとくに限定されない。   The preform 2 is made of a synthetic resin such as polyethylene terephthalate, but the type of resin is not particularly limited.

口径の大きな容器をブロー成形する際に生じがちな口部の変形がないプリフォームが提供できる。   It is possible to provide a preform free from deformation of the mouth portion that tends to occur when a container having a large diameter is blow-molded.

本発明に従うプリフォームの実施の形態を示した図である。It is the figure which showed embodiment of the preform according to this invention. (a)(b)はプリフォームの要部を拡大して示した図である。(a) (b) is the figure which expanded and showed the principal part of the preform.

符号の説明Explanation of symbols

１ ブローコア
1a 通路
２ プリフォーム
2a 内壁
2b 口部
2c 胴部
2d 環状凸部
2e シール部 1 Blow core
1a Passage 2 Preform
2a Inner wall
2b mouth
2c trunk
2d annular projection
2e Seal part

Claims (3)

ブローコアへの押し込みにてその外周に適合させる内壁を有する口部と、この口部につながり容器の内部空間を区画形成する胴部とからなり、該口部の外面下端に環状凸部を備えたブロー成形用プリフォームであって、
前記口部の内壁で、かつ、該環状凸部が存在する位置に、該プリフォームの押し込みに伴ってブローコアの外周に当接するシール部を有することを特徴とするブロー成形用プリフォーム。 It consists of a mouth part having an inner wall adapted to the outer periphery thereof by being pushed into the blow core, and a body part connected to this mouth part to form an internal space of the container, and provided with an annular convex part at the lower end of the outer surface of the mouth part A preform for blow molding,
A blow molding preform characterized by having a seal portion which is in contact with the outer periphery of the blow core as the preform is pushed in at the position where the annular convex portion exists on the inner wall of the mouth portion. 前記シール部の当接幅は、0.3〜0.8mmである、請求項１記載のブロー成形用プリフォーム。   The blow molding preform according to claim 1, wherein a contact width of the seal portion is 0.3 to 0.8 mm. 前記シール部の傾斜角度が10〜45°である、請求項１又は２の何れかに記載のブロー成形用プリフォーム。   The blow molding preform according to claim 1, wherein the seal portion has an inclination angle of 10 to 45 °.
JP2005213221A 2005-07-22 2005-07-22 Blow molding preform Active JP4684038B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005213221A JP4684038B2 (en) 2005-07-22 2005-07-22 Blow molding preform

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005213221A JP4684038B2 (en) 2005-07-22 2005-07-22 Blow molding preform

Publications (2)

Publication Number Publication Date
JP2007030224A true JP2007030224A (en) 2007-02-08
JP4684038B2 JP4684038B2 (en) 2011-05-18

Family

ID=37790077

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005213221A Active JP4684038B2 (en) 2005-07-22 2005-07-22 Blow molding preform

Country Status (1)

Country Link
JP (1) JP4684038B2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016103563A1 (en) * 2014-12-26 2016-06-30 株式会社吉野工業所 Liquid blow molding apparatus and preform
JP2017510484A (en) * 2014-03-17 2017-04-13 エス．アイ．ピー．エイ．ソシエタ’インダストリアリザッジオーネ プロゲッタジオーネ エ オートマジオーネ ソシエタ ペル アチオニ Preform gripping device
JP2020082706A (en) * 2018-11-30 2020-06-04 株式会社吉野工業所 Method for producing extrusion blow container

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6053527U (en) * 1983-09-21 1985-04-15 日立照明株式会社 Injection blow molded products
JP2001121598A (en) * 1999-10-29 2001-05-08 Aoki Technical Laboratory Inc Method for stretch blow molding of wide-mouthed vessel

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6053527U (en) * 1983-09-21 1985-04-15 日立照明株式会社 Injection blow molded products
JP2001121598A (en) * 1999-10-29 2001-05-08 Aoki Technical Laboratory Inc Method for stretch blow molding of wide-mouthed vessel

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017510484A (en) * 2014-03-17 2017-04-13 エス．アイ．ピー．エイ．ソシエタ’インダストリアリザッジオーネ プロゲッタジオーネ エ オートマジオーネ ソシエタ ペル アチオニ Preform gripping device
WO2016103563A1 (en) * 2014-12-26 2016-06-30 株式会社吉野工業所 Liquid blow molding apparatus and preform
JP2016124164A (en) * 2014-12-26 2016-07-11 株式会社吉野工業所 Liquid blow molding device and preform
US10723058B2 (en) 2014-12-26 2020-07-28 Discma Ag Liquid blow molding apparatus and preform
JP2020082706A (en) * 2018-11-30 2020-06-04 株式会社吉野工業所 Method for producing extrusion blow container
JP7195125B2 (en) 2018-11-30 2022-12-23 株式会社吉野工業所 Manufacturing method of extruded blow container

Also Published As

Publication number Publication date
JP4684038B2 (en) 2011-05-18

Similar Documents

Publication Publication Date Title
JP6867111B2 (en) Double-structured container molding preform and double-structured container
US10988277B2 (en) Synthetic resin container and preform
JP2009045876A (en) Preform for molding plastic bottle
CN1261329C (en) Synthetic resin-made vessel body, and die device for pre- form
JP5331324B2 (en) Discharge pump
JP4684038B2 (en) Blow molding preform
JP5286867B2 (en) Preforms and containers
JP2009154943A (en) Synthetic resin bottle
JP6059935B2 (en) Packaging container
JP2007269358A (en) Shaping method of vessel
JP2007030927A (en) Cap, and bottle can having cap
JP2008007147A (en) Pressure resistant bottle of synthetic resin
JP4771313B2 (en) Anti-blocking preform
JP2013079096A (en) Container made of synthetic resin
JP6120153B2 (en) Preform and plastic bottle
JP5750306B2 (en) Manufacturing method of labeled container
JP2010000670A (en) Preform for molding resin container
JP6120154B2 (en) Preform and plastic bottle
TWI545057B (en) Container mouth part
JP2010126240A (en) Blow-molded container
JP2010000669A (en) Preform for stretch blow molding
JP2019147600A (en) Bottle
JP6817515B2 (en) Composite preform
JP2002347731A (en) Mouth of container
CN203921424U (en) A kind of chemical vessel

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20080129

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20101022

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101026

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101220

RD03 Notification of appointment of power of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7423

Effective date: 20101220

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110208

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110208

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20140218

Year of fee payment: 3

R150 Certificate of patent or registration of utility model

Ref document number: 4684038

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150