JPH01238921A - Method for extrusion-blow-molding of pressure vessel, ribbed pressure vessel molded by said method and mold assembly for molding said pressure vessel - Google Patents
Method for extrusion-blow-molding of pressure vessel, ribbed pressure vessel molded by said method and mold assembly for molding said pressure vesselInfo
- Publication number
- JPH01238921A JPH01238921A JP63066066A JP6606688A JPH01238921A JP H01238921 A JPH01238921 A JP H01238921A JP 63066066 A JP63066066 A JP 63066066A JP 6606688 A JP6606688 A JP 6606688A JP H01238921 A JPH01238921 A JP H01238921A
- Authority
- JP
- Japan
- Prior art keywords
- parison
- blow
- blow mold
- positioning ring
- mold
- 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
- 238000010101 extrusion blow moulding Methods 0.000 title claims description 23
- 238000000465 moulding Methods 0.000 title claims description 12
- 238000000034 method Methods 0.000 title abstract description 17
- 238000007664 blowing Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000005520 cutting process Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 229920005989 resin Polymers 0.000 abstract description 8
- 239000011347 resin Substances 0.000 abstract description 8
- 230000002093 peripheral effect Effects 0.000 abstract 4
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000003825 pressing Methods 0.000 description 6
- 229920003002 synthetic resin Polymers 0.000 description 6
- 239000000057 synthetic resin Substances 0.000 description 6
- 229920000139 polyethylene terephthalate Polymers 0.000 description 5
- 239000005020 polyethylene terephthalate Substances 0.000 description 5
- -1 Polyethylene terephthalate Polymers 0.000 description 3
- 238000000071 blow moulding Methods 0.000 description 3
- 238000010102 injection blow moulding Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002304 perfume Substances 0.000 description 2
- 235000001270 Allium sibiricum Nutrition 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000002917 insecticide Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 description 1
- 229920006122 polyamide resin Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Landscapes
- Containers Having Bodies Formed In One Piece (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、耐圧容器の押出ブロー成形方法及び同方法で
成形したリブ付き耐圧容器及び同耐圧容器の成形用金型
装置に関し、簡便、安価に耐圧容器を押出ブロー成形で
きる方法・１ｔひにその金型装置を提供するとともに、
押出ブロー［成形により口部にリブを立設した新規な耐
圧容器を提供する。Detailed Description of the Invention <Industrial Application Field> The present invention relates to a method for extrusion blow molding a pressure container, a ribbed pressure container molded by the same method, and a mold device for molding the pressure container, which is simple and inexpensive. In addition to providing a method and mold device for extrusion blow molding a pressure-resistant container,
Provides a new pressure-resistant container with ribs erected at the mouth by extrusion blow molding.
〈従来技術〉
エアゾール容器、エアーポンプなどの耐圧容器は、香水
、殺虫剤などの内容物を液化ガスとともに封入し、内圧
を例えば２０気圧以上に（Ｖ持して内容物を噴霧するよ
うに構成するために、耐圧容器の口部とこれに嵌着され
るバルブとの間を完全に封止して、容器の機密性を高め
てやる必要がある。<Prior art> Pressure-resistant containers such as aerosol containers and air pumps are configured to enclose contents such as perfumes and insecticides together with liquefied gas, and spray the contents while maintaining an internal pressure of, for example, 20 atmospheres or higher (V). In order to do this, it is necessary to completely seal the gap between the mouth of the pressure-resistant container and the valve fitted thereto to increase the airtightness of the container.
このために、従来の合成樹脂製の耐圧容器では、バルブ
側にゴムなどの軟質弾性体を内装し、容器側の口部の上
端面にリブを周設して、ｂ’： ａ状態における弾性体
の接圧を当該周設リブて高めるようにしたものが少なく
ない。For this purpose, in conventional pressure-resistant containers made of synthetic resin, a soft elastic material such as rubber is installed on the valve side, and a rib is provided around the upper end surface of the opening on the container side. Many devices use the surrounding ribs to increase the contact pressure against the body.
因みに、一般的に、合成樹脂製の中空成形品を製造する
方法としてはブロー成形法かあるか、上述のリブ付き耐
圧容器の製造に関しては、（１）容器の肉厚を厚くして
耐圧強度を高める・、す、（２）口部にリブを突出する
ことから、耐圧容器の成形に精密さが要求される点
に鑑みれば、相対的に精度が劣る押出ブロー成形法では
製造が容易でないのが実情であって、延伸式或いは無延
伸式の射出ブロー成形法が適している。Incidentally, in general, blow molding is the method for manufacturing hollow molded products made of synthetic resin.In regards to manufacturing the above-mentioned pressure-resistant containers with ribs, (1) increasing the wall thickness of the container to increase its pressure-resistance strength; (2) Considering that precision is required in the molding of pressure-resistant containers due to the ribs protruding from the mouth, manufacturing is not easy using the extrusion blow molding method, which has relatively poor precision. This is the actual situation, and a stretch or non-stretch injection blow molding method is suitable.
〈発明が解決しようとする課題〉
しかしながら、耐圧容器を射出ブロー成形法で成形する
と、成形装置が大型且つ複雑になるために製造コストが
割り高になるうえ、設備償却の観点から単位金型当たり
の成形品数を高めなけれならないので、大型容器から小
型容器までをニーズに合わせて少量づつ成形するのには
適していない。<Problem to be solved by the invention> However, when pressure-resistant containers are molded using the injection blow molding method, the molding equipment becomes large and complicated, resulting in relatively high manufacturing costs. Since the number of molded products must be increased, it is not suitable for molding large to small containers in small quantities according to needs.
本発明は、安価で且つ簡便に合成樹脂製のリブ付き耐圧
容器を製造することを技術的課題とする。The technical object of the present invention is to inexpensively and easily manufacture a ribbed pressure-resistant container made of synthetic resin.
く課題を解決するための手段〉
本発明は、成形コストが安（、多品種少量生産に適して
いる押出ブロー成形法を基礎として成立している。Means for Solving the Problems> The present invention is based on an extrusion blow molding method that is low in molding cost and suitable for high-mix, low-volume production.
当該押し出しブロー成形方法は、例えば第２図に示すよ
うに、押し出し機から押し出したパリソンｌをブロー金
型２内に挾み込み、ブローノズル３をパリソン１内に下
降させるとともに、位置決めリング４にカットリング５
を外嵌した上押さえ部材６でブロー金型２の−Ｆ方を閉
じ、ブローノズル３からパリソン１の中に圧縮気体を送
り込んでパリソン１をブロー金型２の内面２ａに膨張・
密着させたのち、カットリング５の操作によりブロー金
型２の上方にはみ出したパリソンスカート部７をブロー
金型２内の成形品部８から切断して中空成形品を成形す
ることを基本的技術とするものである。In the extrusion blow molding method, for example, as shown in FIG. cut ring 5
The -F side of the blow mold 2 is closed with the upper holding member 6 which is fitted onto the outside, and compressed gas is sent into the parison 1 from the blow nozzle 3 to expand the parison 1 onto the inner surface 2a of the blow mold 2.
The basic technique is to cut the parison skirt part 7 that protrudes above the blow mold 2 from the molded part 8 in the blow mold 2 by operating the cut ring 5 after making a close contact, thereby forming a hollow molded product. That is.
本発明者等は、力・ハトリングをブロー金型に対して位
置決めする役割の位置決めリング・１に青目し、当該位
置決めリング４に全く新しい雌型としての機能を持たせ
て、−段で耐圧容器の本体と口部のリブとを同時に形成
する方法を発明するとともに、上記構成により射出ブロ
一方法ではなく押出ブロ一方法で初めて成形できた新規
なリブ付き耐圧容器を提供する。The inventors designed the positioning ring 1, which has the role of positioning the force ring with respect to the blow mold, to blue-eye, and gave the positioning ring 4 a completely new function as a female mold, so that it can withstand pressure at -stage. To invent a method for simultaneously forming the main body and mouth ribs of a container, and to provide a novel pressure-resistant container with ribs that can be molded for the first time by an extrusion blowing method instead of an injection blowing method with the above structure.
即ち、本発明の構成を実施例に対応する図面に用いて説
明すると、まず、
第１発明は、上記基本的技術としての中空成形品の押出
ブロー成形方法において、
上記位置決めリング４の下面４ａに周溝ｌＯを凹状に形
成して、ブローノズル３から送り込まれた圧縮気体でパ
リソンｌを周溝１０内に押し込みながら位置決めリング
４の下面４ａに密着させて、成形品部８の上端面１２に
周方向に亘りリブ１４を突設してリブ付き耐圧容器を成
形することを特徴とする耐圧容器の押出ブロー成形方法
である。That is, to explain the structure of the present invention using the drawings corresponding to the embodiments, the first invention is, in the extrusion blow molding method for a hollow molded product as the basic technique, the lower surface 4a of the positioning ring 4 is The circumferential groove lO is formed into a concave shape, and while the parison l is pushed into the circumferential groove 10 by compressed gas sent from the blow nozzle 3, it is brought into close contact with the lower surface 4a of the positioning ring 4, and the parison l is pressed into the upper end surface 12 of the molded part 8. This is an extrusion blow molding method for a pressure container characterized by forming a ribbed pressure container by providing ribs 14 protruding in the circumferential direction.
また、第２発明は、押出ブロー成形方法で合成樹脂製の
耐圧容器２０を成形し、耐圧容器２０は、筒状の胴体部
１５の上方に小型筒状の口部１７を立設し、口部１７の
先端寄りに段状部１８を周設するとともに、当該口部１
７の先端面１２に周方向に亘りリブ１４を突設して構成
したことを特徴とする押出ブロー成形方法で成形したリ
ブ付き耐圧容器である。Further, in the second invention, a pressure-resistant container 20 made of synthetic resin is molded by an extrusion blow molding method, and the pressure-resistant container 20 has a small cylindrical opening 17 erected above the cylindrical body 15. A stepped portion 18 is provided around the tip of the portion 17, and the mouth portion 1
This is a pressure-resistant container with ribs formed by an extrusion blow molding method, characterized in that ribs 14 are provided protruding from the tip surface 12 of the container 7 in the circumferential direction.
さらに、第３発明は、パリソンｌを挟み込んで内面２ａ
に密着させる二つ割りのブロー金型２と、ブロー金型２
内に挟み込まれたパリソン１の中に下降させて圧縮気体
を吹き込むブローノズル３と、ブロー金型２内に挟み込
まれたパリソン１の上方を閉じる上押さえ部材６とから
構成されるとともに、 当該上押さえ部材６は、回動操
作によりブロー金型２の上方にはみ出したパリソンスカ
ート部７をブロー金型２内の成形品部８から切断するカ
ットリング５と、カットリング５の位置決め用に内嵌さ
れる位置決めリング４とから成り、当該位置決めリング
４の下面４ａに、ブローノズル３から送り込まれた圧縮
気体で膨張したパリソン１が密着状に押し込まれて、パ
リソン１の膨張・冷却によりできた成形品部８の位置決
めリング４に対する接触面１２に周方向に亘りリブ１４
が突設されるように周溝１０を凹状に形成したことを特
徴とするリブ付き耐圧容器の成形用金型装置である。Furthermore, in the third invention, the parison l is sandwiched and the inner surface 2a is
A two-split blow mold 2 and a blow mold 2
It is composed of a blow nozzle 3 that is lowered to blow compressed gas into the parison 1 sandwiched within the mold, and an upper pressing member 6 that closes the upper part of the parison 1 that is sandwiched within the blow mold 2. The holding member 6 includes a cut ring 5 for cutting the parison skirt portion 7 that protrudes above the blow mold 2 due to the rotation operation from the molded product portion 8 in the blow mold 2, and a cut ring 5 that is fitted inside for positioning the cut ring 5. The parison 1 expanded by the compressed gas sent from the blow nozzle 3 is tightly pressed into the lower surface 4a of the positioning ring 4, and the molding formed by expanding and cooling the parison 1. A rib 14 is provided in the circumferential direction on the contact surface 12 of the component part 8 with respect to the positioning ring 4.
This is a mold device for molding a pressure-resistant container with ribs, characterized in that the circumferential groove 10 is formed in a concave shape so as to protrude.
く作用〉
上押さ丸部材６でブロー金型２の上方を閉じた時点では
、パリソンｌのパリソンスカート部７はブロー金型２と
上押さえ部材６の外側のカットリング５とで挟み込まれ
るとともに、上押さえ部材６の内側の位置決めリング４
の下面４ａはブロー金型２の内部に臨むことになる。Action> When the upper part of the blow mold 2 is closed by the upper press round member 6, the parison skirt part 7 of the parison l is sandwiched between the blow mold 2 and the outer cut ring 5 of the upper press member 6, Positioning ring 4 inside the upper holding member 6
The lower surface 4a faces the inside of the blow mold 2.
従って、例えば、上押さえ部材６の中央に空けた貫通孔
からパリソン１の中にブローノズル３を下降させて圧縮
気体を送り込むと、パリソン１はブロー金型２の内面２
ａに膨張・密着されると同時に、当該金型２内に納まっ
たパリソンｌの上部は、上記位置決めリング４の下面４
ａに向かって密着される。Therefore, for example, when the blow nozzle 3 is lowered into the parison 1 through a through hole formed in the center of the upper holding member 6 to feed compressed gas, the parison 1 is moved to the inner surface of the blow mold 2.
At the same time as the parison l is expanded and brought into close contact with
It is closely attached towards a.
この結果、位置決めリング４の下面４ａに周設された周
溝１０の中にもパリソンｌは密着状に押し込まれるので
、パリソン１の膨張・冷却によりできた成形品部８のう
ち、当該位置決めリング４の下面４ａに接する接触面（
即ち、耐圧容器２０の口部１７の先端面）１２には周方
向に亘りリブ１４が突設される。As a result, the parison l is also tightly pressed into the circumferential groove 10 provided on the lower surface 4a of the positioning ring 4, so that the positioning ring The contact surface in contact with the lower surface 4a of 4 (
That is, a rib 14 is provided protruding from the tip end surface 12 of the mouth 17 of the pressure container 20 in the circumferential direction.
〈発明の効果〉
（１）第１発明においては、既存の押出ブローの成形用
金型装置をそのまま利用して、下面に周溝を凹設した位
置決めリングにパリソンを密着させることにより、−段
で耐圧容器の容器本体と上端面のリブとを同時に形成で
きるので、新たな加工工程を必要とせず、初めて押出ブ
ロー成形により迅速、且つ、簡便にリブ付き耐圧容器を
成形できるうえ、最近の合成樹脂−耐圧容器の傾向であ
る多品種少量生産にも適合させられる。<Effects of the Invention> (1) In the first invention, the existing extrusion blow molding device is used as is, and the parison is brought into close contact with the positioning ring having a circumferential groove on the lower surface, thereby forming the -step. Since the main body of the pressure container and the ribs on the top end surface can be formed simultaneously with the process, no new processing steps are required, and a ribbed pressure container can be quickly and easily formed using extrusion blow molding for the first time. It can also be adapted to high-mix, low-volume production, which is the trend for resin-pressure containers.
（２）上記第１発明によって、射出ブロー成形ではな（
、押出ブロー成形による新規な合成樹脂製のリブ付き耐
圧容器、即ち、第２発明の耐圧容器を提供でき、容器の
製造コストが安価になる。(2) According to the first invention, injection blow molding (
, it is possible to provide a new ribbed pressure-resistant container made of synthetic resin by extrusion blow molding, that is, the pressure-resistant container of the second invention, and the manufacturing cost of the container is reduced.
（３）第３発明においては、位置決めリングの下面に周
溝を凹設するだけなので、既存の金型装置をそっくり利
用でき、リブ付は工程専用の部材或いは機構を新たに金
型装置に組み込む必要はない。(3) In the third invention, since the circumferential groove is simply recessed on the lower surface of the positioning ring, the existing mold device can be used completely, and the ribbed type requires a new process-specific member or mechanism to be incorporated into the mold device. There's no need.
〈実施例〉 以下、本発明の実施例を図面に基づいて述べる。<Example> Hereinafter, embodiments of the present invention will be described based on the drawings.
第１図は押出ブロー成形用の金型装置の縦断面図、第２
図はパリソンを挟み込む前の状態を示す同金型装置の要
部縦断面図、第３図は同金型装置の位置決めリング周辺
の要部拡大縦断面図であって、押出ブロー用の金型装置
は、二つ割りの雌型タイプのブロー金型２と、圧縮空気
を噴き出すブローノズル３と、ブロー金型２の上方に配
置する上押さえ部材６とから構成される。Figure 1 is a vertical sectional view of a mold device for extrusion blow molding, Figure 2
The figure is a vertical sectional view of the main part of the same mold device showing the state before sandwiching the parison, and Figure 3 is an enlarged vertical sectional view of the main part around the positioning ring of the same mold device, which is a mold for extrusion blowing The device is comprised of a female blow mold 2 split into two, a blow nozzle 3 that blows out compressed air, and an upper pressing member 6 disposed above the blow mold 2.
上記ブローノズル３は、例えば押し出し機２１のダイ２
２の中央部からブロー金型２内に下降するように構成さ
れるとともに、上押さえ部材６は当該ブローノズル３に
同心状に外嵌されて上下に同行移動可能に固定される。The blow nozzle 3 is, for example, a die 2 of an extruder 21.
The upper pressing member 6 is configured to descend into the blow mold 2 from the center of the blow nozzle 2, and is fitted onto the blow nozzle 3 concentrically and fixed so as to be movable up and down.
上記上押さえ部材６は、ブローノズル３に直接支持され
る円柱状の位置決めリング４と、これに相対回動不能に
外嵌されて位置決めされる略円筒状のカットリング５と
から構成される。The upper holding member 6 is composed of a cylindrical positioning ring 4 directly supported by the blow nozzle 3, and a substantially cylindrical cut ring 5 that is fitted onto the cylindrical positioning ring 4 so as to be relatively unrotatable and positioned.
当該カットリング５の内周面を直円筒面状に、また、そ
の外周面を下絞り状の円錐台面状に各々形成してカット
リング５の下端縁を先鋭刃５ａに加工し、当該先鋭刃６
ａを位置決めリング４の下面４ａより若干下方に突出さ
せる。The inner circumferential surface of the cut ring 5 is formed into a right cylindrical surface, and the outer circumferential surface thereof is formed into a truncated conical surface with a bottom drawing shape, and the lower end edge of the cut ring 5 is processed into a sharp edge 5a. 6
a slightly protrudes downward from the lower surface 4a of the positioning ring 4.
尚、カットリング５の下部先鋭刃５ａは、周方向に亘り
所々で断続状に形成されて、パリソン１に噛み込ませた
のち回動じて初めて切断できるように構成される。The lower sharp edge 5a of the cut ring 5 is formed intermittently at various points along the circumferential direction, and is configured so that it can cut only when it is rotated after being bit into the parison 1.
一方、上記位置決めリング４の下面４ａの外周寄りに二
重の周溝ｌＯを凹設し、その内周側の周溝１０ａを浅（
てＲ状に形成し、その外周側の周溝１０ｂを深くて逆台
形状に形成する。On the other hand, double circumferential grooves lO are formed near the outer circumference of the lower surface 4a of the positioning ring 4, and the inner circumferential groove 10a is shallow (
The circumferential groove 10b on the outer circumferential side thereof is formed into a deep, inverted trapezoidal shape.
但し、符号２４はブロー金型２に空けた冷却水孔、符号
２５は下記パリソンスカート部７を案内するためにブロ
ー金型２の上部に配置されたランナーである。However, the reference numeral 24 is a cooling water hole formed in the blow mold 2, and the reference numeral 25 is a runner arranged at the upper part of the blow mold 2 to guide the parison skirt portion 7 described below.
そこで、上記金型装置を用いた合成樹脂製耐圧容器の押
出ブロー成形法を説明する。Therefore, an extrusion blow molding method for a pressure-resistant container made of synthetic resin using the above-mentioned mold apparatus will be explained.
（１）ホッパから押し出し機２１内にポリエチレンテレ
フタレート（ＰＥＴ）樹脂を供給してこれをスクリニー
で搬送しながら加熱溶融し、ダイ２２の先端の二重コー
ン状をしたノズルとマンドレルとの間のスリットからパ
リソン１（上記溶融樹脂の肉厚チャーブ）を二つ割りに
開いたブロー金型２の間に押し出したのち（第２図参照
）、パリソンｌの上部を切断する。(1) Polyethylene terephthalate (PET) resin is supplied from the hopper into the extruder 21, heated and melted while being conveyed by a screenie, and the slit is inserted between the double cone-shaped nozzle at the tip of the die 22 and the mandrel. After extruding the parison 1 (thick chives of the molten resin) between the two halves of the blow mold 2 (see FIG. 2), the upper part of the parison 1 is cut off.
尚、上記ＰＥＴ樹脂は、ガスバリヤ−性・引っ張り強度
などの物性に優れ、溶融状態における流動性が高く、透
明であるので、耐圧容器の材質に適している。The PET resin has excellent physical properties such as gas barrier properties and tensile strength, has high fluidity in a molten state, and is transparent, so it is suitable as a material for pressure containers.
また、パリソンコントローラにより、ダイのスリ、トの
幅を適正に制御して、でき上がった中空成形品の肉厚を
一定に保持するとともに、その肉厚は耐圧容器の基準で
ある３ｉＩＩｍ以上になるようにコントロールする。In addition, the parison controller appropriately controls the width of the slits and grooves of the die to maintain a constant wall thickness of the finished hollow molded product, and to ensure that the wall thickness is at least 3iIIm, which is the standard for pressure containers. control.
（２）パリソンｌをブロー金型２内に挟み込んで、パリ
ソンｌの下部を押し閉じて融着させたのち、ブローノズ
ル３をパリソンｌの中に下降させて、同行移動してきた
上押さえ部材６でブロー金型２の上方を閉じる。(2) After inserting the parison l into the blow mold 2 and pressing the lower part of the parison l to fuse it, the blow nozzle 3 is lowered into the parison l, and the upper holding member 6 moves along with the parison l. Close the upper part of blow mold 2 with .
このとき、上押さえ部材６の内寄りの位置決めリング４
の下面、４ａはブロー金型２の内部に臨み、その外寄り
のカットリング５の下部先鋭刃５ａはブロー金型２の型
内面の上端縁２３にパリソンｌを介して上方から臨む。At this time, the inner positioning ring 4 of the upper holding member 6
The lower surface 4a faces the inside of the blow mold 2, and the lower sharp edge 5a of the outer cut ring 5 faces the upper edge 23 of the inner surface of the blow mold 2 from above through the parison l.
（３）ブローノズル３から圧縮空気を吹き込んで、パリ
ソン１をブロー金型２の内面２ａに膨張・密着させると
同時に、位置決めリング４の下面４ａに凹設した周溝１
０内に密着状に押し込む（第１図参照）とともに、冷却
する。(3) Compressed air is blown from the blow nozzle 3 to expand and bring the parison 1 into close contact with the inner surface 2a of the blow mold 2, and at the same time, the circumferential groove 1 recessed in the lower surface 4a of the positioning ring 4
0 (see Figure 1) and cooled.
（４）パリソン１の密着・冷却で出来上がったブロー金
型２内の成形品部８は、ブロー金型２外の上方にランナ
ー２５に沿ってはみ出したパリソンスカート部７を連出
しているので、前記カットリング５をブローノズル３ご
と回動して、カットリング５の下部先鋭刃５ａでブロー
スカート部７の連出基端部７ａをねじ切ることにより、
当該ブロースカート部７を成形品部８から切断する。(4) The molded product part 8 in the blow mold 2 that is completed by the close contact and cooling of the parison 1 has a parison skirt part 7 that protrudes above the outside of the blow mold 2 along the runner 25. By rotating the cut ring 5 together with the blow nozzle 3 and threading the continuous proximal end 7a of the blow skirt part 7 with the lower sharp blade 5a of the cut ring 5,
The blow skirt portion 7 is cut from the molded product portion 8.
（５）ブロー金型２を開いて上記成形品部８を取り出し
、下部スカート部２６のパリ取りなどの後仕上げをして
最終の耐圧容器２０を得る。(5) Open the blow mold 2, take out the molded part 8, and perform post-finishing such as deburring the lower skirt part 26 to obtain the final pressure-resistant container 20.
当該ＰＥＴ樹脂製のリプ付き耐圧容器２０は、なにより
も押出ブロー成形方法で成形された点が新規であって、
基本的に胴体部１５と肩部１６と口部１７とから成り、
口部１７の先端面１２、つまり、上記位置決めリング４
の下面４ａに対する接触面にリブ１４を周設したことを
特徴とする。The pressure-resistant container 20 with a lip made of PET resin is novel in that it is molded by an extrusion blow molding method,
Basically consists of a body part 15, a shoulder part 16 and a mouth part 17,
The distal end surface 12 of the mouth portion 17, that is, the positioning ring 4
It is characterized in that a rib 14 is provided around the contact surface with the lower surface 4a.
即ち、上記耐圧容器２０は、直円筒状の胴体部１５の開
口部を絞って肩部１６と成し、肩部１６から上方に小径
円筒状の口部１７を立設し、口部１７の先端寄りに大径
円筒状の膨出部１１を形成し、膨出部１１の下部りに段
落ち溝１８を周設するとともに、当該膨出部１１の先端
面１２の周方向に亘り二重のリブ１４を突設して構成し
たものである。That is, in the pressure-resistant container 20, the opening of the right cylindrical body part 15 is constricted to form a shoulder part 16, and a small diameter cylindrical mouth part 17 is provided upwardly from the shoulder part 16. A large-diameter cylindrical bulge 11 is formed near the tip, and a stepped groove 18 is provided around the bottom of the bulge 11, and a double groove is formed in the circumferential direction of the tip surface 12 of the bulge 11. It is constructed by protruding ribs 14.
上記二重のリブ１４のうち、内周側のリブ１４ａは前記
位置決めリング４の内周側周溝１０ａに押し込まれて低
いＲ状の山型に成形されるとともに、外周側のリブ１４
ｂは位置決めリング４の外周側周溝１０ｂに押し込まれ
て高い台形状の山型に形成される。Of the double ribs 14, the inner rib 14a is pushed into the inner circumferential groove 10a of the positioning ring 4 and formed into a low R-shaped chevron, and the outer rib 14
b is pushed into the outer circumferential groove 10b of the positioning ring 4 and formed into a high trapezoidal mountain shape.
当該耐圧容器２０の実際の使用に際しては、容器２０の
口部１７にバルブが嵌合して段落ち溝１８にかしめ付け
られるが、バルブに内装されるゴム体は容器２０側の膨
出部先端面１２の二重リブ１４に圧接されて封止力が向
上する。When the pressure container 20 is actually used, the valve is fitted into the mouth 17 of the container 20 and caulked into the stepped groove 18, but the rubber body inside the valve is attached to the tip of the bulge on the container 20 side. It is pressed against the double ribs 14 on the surface 12 and the sealing force is improved.
但し、本耐圧容器２０の上端面１２に周設するリブ１４
は本数及び形状は上記実施例に限定されず、例えば、三
角形状のリブ１４を一本設けても良い。However, the rib 14 provided around the upper end surface 12 of the pressure container 20
The number and shape of ribs 14 are not limited to those in the above embodiment, and for example, one triangular rib 14 may be provided.
上記耐圧容器全体の形状も、例えば、口部１７を小径の
直円筒状に形成し、その長さ方向の途中部の周方向に亘
りバルブを係合するための溝を凹設しても良い。Regarding the overall shape of the pressure-resistant container, for example, the mouth portion 17 may be formed into a small-diameter right cylindrical shape, and a groove for engaging a valve may be recessed in the circumferential direction in the middle of the mouth portion 17 in the length direction. .
耐圧容器の材質は、上記ＰＥＴ樹脂を初め、ポリエチレ
ン、ポリプロピレン、ポリ塩化ビニルなどのポリオレフ
ィン系樹脂、ガスバリヤ−性に優れたポリアミド系樹脂
、エチレン−酢酸ビニル共重合体など、押し出しブロー
成形に適するものであれば、特に限定されない。The material for the pressure container is one that is suitable for extrusion blow molding, such as the PET resin mentioned above, polyolefin resins such as polyethylene, polypropylene, and polyvinyl chloride, polyamide resins with excellent gas barrier properties, and ethylene-vinyl acetate copolymers. If so, there are no particular limitations.
尚、透明樹脂で容器を製すれば、香水などの内容物の残
存量を容易に確認できる。Note that if the container is made of transparent resin, the remaining amount of the contents, such as perfume, can be easily confirmed.
一方、押出ブロー成形法は、上記無延伸式に限らず、延
伸により樹脂の分子配向を整えて強度を増すようにして
も良い。On the other hand, the extrusion blow molding method is not limited to the above-mentioned non-stretching method, but may also be used to improve the strength by adjusting the molecular orientation of the resin by stretching.
また、ブロー成形に用いる本成形用金型装置は、多頭式
、水平型或いは垂直型連続ロータリー式など種々のブロ
ー成形方式に適用できる。Further, this molding device used for blow molding can be applied to various blow molding methods such as a multi-head type, a horizontal type, or a vertical continuous rotary type.
他方、ブロー金型２の上方を閉じる成形工程においては
、上押さえ部材６をブローノズル３とは別個に作動させ
て金型２を閉じるようにしても良い。On the other hand, in the molding process of closing the upper part of the blow mold 2, the upper pressing member 6 may be operated separately from the blow nozzle 3 to close the mold 2.
さらに、ブロー金型２外にはみ出したパリソンスカート
部７の切断方法としては、上記実施例のような回動操作
に限定されず、例えば、カッＩ−１，１ング５の下部先
鋭刃５ａを周方向に連続状に形成し、下方への強力な抑
圧操作により切断するようにしても差し支えない。Furthermore, the method for cutting the parison skirt portion 7 protruding outside the blow mold 2 is not limited to the rotational operation as in the above embodiment, but for example, the lower sharp blade 5a of the cutter I-1, 1 ring 5 is used. It may be formed continuously in the circumferential direction and cut by a strong downward pressing operation.
第１図は押出ブロー成形用の金型装置の縦断面図、第２
図はパリソンを挟み込む前の状態を示す同金型装置の要
部縦断面図、第３図は同金型装置の位置決めリング周辺
の要部拡大縦断面図である。
１・・・パリソン、２・・・ブロー金型、２ａ・・・２
の内面、３・・・ブローノズル、４・・・位置決めリン
グ、４ａ・・・４の下面、５・・・カットリング、６・
・・上押さえ部材、７・・・パリソンスカート部、８・
・・成形品部、１０・・・周溝、１２・・・８の上端面
、１４・・・リブ、１５・・・胴体部、１７・・・口部
、１８・・・段状部。
特許出願人 岩谷産業株式会社Figure 1 is a vertical sectional view of a mold device for extrusion blow molding, Figure 2
The figure is a vertical cross-sectional view of a main part of the mold apparatus showing a state before the parison is inserted, and FIG. 3 is an enlarged vertical cross-sectional view of the main part of the mold apparatus around the positioning ring. 1...Parison, 2...Blow mold, 2a...2
3... Blow nozzle, 4... Positioning ring, 4a... Lower surface of 4, 5... Cut ring, 6...
...Top holding member, 7...Parison skirt part, 8.
... Molded part, 10... Circumferential groove, 12... Upper end surface of 8, 14... Rib, 15... Body part, 17... Mouth part, 18... Stepped part. Patent applicant Iwatani Sangyo Co., Ltd.
Claims (1)
２内に挟み込み、ブローノズル３をパリソン１内に下降
させるとともに、位置決めリング４にカットリング５を
外嵌した上押さえ部材６でブロー金型２の上方を閉じ、
ブローノズル３からパリソン１の中に圧縮気体を送り込
んでパリソン１をブロー金型２の内面２ａに膨張・密着
させたのち、カットリング５の操作によりブロー金型２
の上方にはみ出したパリソンスカート部７をブロー金型
２内の成形品部８から切断して中空成形品を成形する押
出ブロー成形方法において、 上記位置決めリング４の下面４ａに周溝１０を凹状に形
成して、ブローノズル３から送り込まれた圧縮気体でパ
リソン１を周溝１０内に押し込みながら位置決めリング
４の下面４ａに密着させて、成形品部８の上端面１２に
周方向に亘りリブ１４を突設してリブ付き耐圧容器を成
形することを特徴とする耐圧容器の押出ブロー成形方法 ２、押出ブロー成形方法で合成樹脂製の耐圧容器２０を
成形し、耐圧容器２０は、筒状の胴体部１５の上方に小
型筒状の口部１７を立設し、口部１７の先端寄りに段状
部１８を周設するとともに、当該口部１７の先端面１２
に周方向に亘りリブ１４を突設して構成したことを特徴
とする押出ブロー成形方法で成形したリブ付き耐圧容器 ３、パリソン１を挟み込んで内面２ａに密着させる二つ
割りのブロー金型２と、ブロー金型２内に挟み込まれた
パリソン１の中に下降させて圧縮気体を吹き込むブロー
ノズル３と、ブロー金型２内に挟み込まれたパリソン１
の上方を閉じる上押さえ部材６とから構成されるととも
に、 当該上押さえ部材６は、回動操作によりブロー金型２の
上方にはみ出したパリソンスカート部７をブロー金型２
内の成形品部８から切断するカットリング５と、カット
リング５の位置決め用に内嵌される位置決めリング４と
から成り、 当該位置決めリング４の下面４ａに、ブローノズル３か
ら送り込まれた圧縮気体で膨張したパリソン１が密着状
に押し込まれて、パリソン１の膨張・冷却によりできた
成形品部８の位置決めリング４に対する接触面１２に周
方向に亘りリブ１４が突設されるように周溝１０を凹状
に形成したことを特徴とするリブ付き耐圧容器の成形用
金型装置[Claims] 1. An upper holding member that holds the parison 1 extruded from the extruder into the blow mold 2, lowers the blow nozzle 3 into the parison 1, and fits the cut ring 5 onto the positioning ring 4. Close the upper part of the blow mold 2 with 6,
After blowing compressed gas into the parison 1 from the blow nozzle 3 to expand and bring the parison 1 into close contact with the inner surface 2a of the blow mold 2, the blow mold 2 is removed by operating the cut ring 5.
In an extrusion blow molding method in which a hollow molded product is formed by cutting the parison skirt portion 7 protruding upward from the molded product portion 8 in the blow mold 2, a circumferential groove 10 is formed in a concave shape on the lower surface 4a of the positioning ring 4. The parison 1 is pressed into the circumferential groove 10 using compressed gas sent from the blow nozzle 3, and brought into close contact with the lower surface 4a of the positioning ring 4. Extrusion blow molding method 2 for a pressure container characterized by molding a ribbed pressure container by protruding from A small cylindrical mouth part 17 is provided upright above the body part 15, a stepped part 18 is provided around the tip end of the mouth part 17, and a tip surface 12 of the mouth part 17 is provided.
A ribbed pressure-resistant container 3 formed by an extrusion blow molding method characterized by having ribs 14 protruding in the circumferential direction; a two-split blow mold 2 for sandwiching the parison 1 and making it tightly contact with the inner surface 2a; A blow nozzle 3 that is lowered to blow compressed gas into the parison 1 sandwiched within the blow mold 2; and a parison 1 sandwiched within the blow mold 2.
The upper holding member 6 closes the upper part of the blow mold 2.
It consists of a cut ring 5 that is cut from the molded part 8 inside, and a positioning ring 4 that is fitted inside for positioning the cut ring 5. Compressed gas is sent from the blow nozzle 3 to the lower surface 4a of the positioning ring 4. The expanded parison 1 is tightly pressed into the circumferential groove so that the rib 14 protrudes in the circumferential direction on the contact surface 12 of the molded part 8 formed by expanding and cooling the parison 1 with the positioning ring 4. A mold device for molding a pressure-resistant container with ribs, characterized in that 10 is formed in a concave shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63066066A JPH01238921A (en) | 1988-03-18 | 1988-03-18 | Method for extrusion-blow-molding of pressure vessel, ribbed pressure vessel molded by said method and mold assembly for molding said pressure vessel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63066066A JPH01238921A (en) | 1988-03-18 | 1988-03-18 | Method for extrusion-blow-molding of pressure vessel, ribbed pressure vessel molded by said method and mold assembly for molding said pressure vessel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01238921A true JPH01238921A (en) | 1989-09-25 |
| JPH0482103B2 JPH0482103B2 (en) | 1992-12-25 |
Family
ID=13305108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63066066A Granted JPH01238921A (en) | 1988-03-18 | 1988-03-18 | Method for extrusion-blow-molding of pressure vessel, ribbed pressure vessel molded by said method and mold assembly for molding said pressure vessel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01238921A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013203413A (en) * | 2012-03-27 | 2013-10-07 | Kyoraku Co Ltd | Plastic container, and method of manufacturing cut ring and plastic container |
| CN104723537A (en) * | 2013-12-19 | 2015-06-24 | 楚天科技股份有限公司 | Plastic container continuous molding all-in-one machine |
-
1988
- 1988-03-18 JP JP63066066A patent/JPH01238921A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013203413A (en) * | 2012-03-27 | 2013-10-07 | Kyoraku Co Ltd | Plastic container, and method of manufacturing cut ring and plastic container |
| CN104723537A (en) * | 2013-12-19 | 2015-06-24 | 楚天科技股份有限公司 | Plastic container continuous molding all-in-one machine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0482103B2 (en) | 1992-12-25 |
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