JPH0368816B2

JPH0368816B2 -

Info

Publication number: JPH0368816B2
Application number: JP59059380A
Authority: JP
Inventors: Yoshuki Matsuzaki
Original assignee: Kyoraku Co Ltd
Current assignee: Kyoraku Co Ltd
Priority date: 1984-03-29
Filing date: 1984-03-29
Publication date: 1991-10-29
Also published as: JPS60203421A

Description

【発明の詳細な説明】〔産業上の利用分野〕本発明は可撓性壁面を有し口部やブラケツト等
の構造部材を設けてなる容器の製造方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for manufacturing a container having a flexible wall surface and provided with structural members such as a mouth and a bracket.

[Prior art]

可撓性壁面を有し、口部がブラケツト等の構造
部材を設けた容器は、自動車窓用洗浄装置の洗浄
液タンク、また医療用の非経口薬液容器等として
使用される。それらの製造方法としては、例えば
実公昭47−6010号公報のように可撓性壁面を２枚
の軟質プラスチツクシートにて形成し、注入口及
びブラケツトを半硬質プラスチツクシートにて形
成し、それらを高周波溶着によつて接合し袋体と
する製造方法、また、特公昭53−4474号公報のよ
うに可撓性壁面と排液口及びハンドルを一体にブ
ロー成形する製造方法が公知である。 A container having a flexible wall surface and a structural member such as a bracket at the mouth is used as a cleaning liquid tank for an automobile window cleaning device, a parenteral drug solution container for medical use, and the like. As for the manufacturing method of these, for example, as in Japanese Utility Model Publication No. 47-6010, the flexible wall surface is formed from two soft plastic sheets, the injection port and the bracket are formed from semi-hard plastic sheets, and the A manufacturing method in which a bag body is formed by joining by high-frequency welding, and a manufacturing method in which a flexible wall surface, a drain port, and a handle are integrally blow-molded as disclosed in Japanese Patent Publication No. 53-4474 are known.

[Problem that the invention seeks to solve]

実公昭47−6010号公報に示された製造方法にあ
つては、２枚の軟質プラスチツクシートを成形す
る工程、注入口及びブラケツトを有する半硬質プ
ラスチツクシートを成形する工程、さらにそれら
のシート部材を高周波溶着にて接合して組み合わ
せる工程を必要とし、製造工程が多工程にわたり
煩雑である。それに対し、特公昭53−4474号公報
に示された製造方法にあつてはブロー成形工程の
みで容器を製造し得る効果を有するが、その反面
可撓性壁面と排液口及びハンドルは、同一のプラ
スチツク材料にて構成するため、排液口及びハン
ドルも可撓性とならざるを得なく、例えば排液口
に別体のチユーブを取付ける際、緊密に取り付け
ることが困難であり、一方、排液口及びハンドル
の強度を得ようとすれば、可撓性壁面が所望の柔
軟さを失なうという問題がある。 The manufacturing method disclosed in Japanese Utility Model Publication No. 47-6010 involves a step of molding two soft plastic sheets, a step of molding a semi-hard plastic sheet having an injection port and a bracket, and a step of molding these sheet members. It requires a process of joining and assembling by high-frequency welding, and the manufacturing process is complicated and involves many steps. On the other hand, the manufacturing method shown in Japanese Patent Publication No. 53-4474 has the advantage of being able to manufacture containers using only the blow molding process, but on the other hand, the flexible wall surface, drain port, and handle are all the same. Because the tube is made of plastic material, the drain port and handle must also be flexible. For example, when attaching a separate tube to the drain port, it is difficult to attach it tightly. In order to obtain strength in the spout and handle, there is a problem in that the flexible wall loses its desired flexibility.

[Summary of the invention]

本発明はブロー成形を基本とし、従来にない新
規な方法によつて上記問題点を解決するものであ
る。 The present invention is based on blow molding, and is intended to solve the above-mentioned problems using a novel method that has not been seen before.

即ち、本発明は、引張弾性率が２×10³Kg／cm²
未満の軟質のプラスチツクと硬質のプラスチツク
とをそれぞれ別々の押出機にて溶融混練し、上記
軟質と硬質のプラスチツクを押出ダイ内にて接合
し、可塑化された筒状のあるいは２枚のシート状
のパリスンとして押出ダイより押出し、可撓性壁
面成形キヤビテイと口部等を備える一体構造部材
成形キヤビテイとを内部に有する分割形式の金型
にて上記パリスンを保持するに際し、軟質のプラ
スチツクが可撓性壁面成形キヤビテイに、硬質の
プラスチツクが一体構造部材成形キヤビテイに対
応するように配置し、ついでパリスン内に圧力流
体を導入してパリスンを金型内にて膨張させキヤ
ビテイの形状に成形して口部等を備える硬質の一
体構造部材を軟質の可撓性面と一体に形成する、
可撓性壁面を有する容器の製造方法に係り、自動
車窓用洗浄装置の洗浄液タンク、医療用の非経口
薬液容器のように、全体として可撓性に優れ、し
かも、可撓性部分との接続において機械的強度の
大なる口部、ブラケツト、ハンドル等を要求され
る容器をブロー成形にて一体に製造することがで
き、また、金型にてパリスンを保持するに際し、
押出方向と直交するパリスンの両側を金型のピン
チオフ部にて挾持すれば、パリスンがキヤビテイ
内で良好に配置して膨張させることができ、よつ
て所望の箇所にそれぞれの特性を備えた容器を製
造することができる。 That is, the present invention has a tensile modulus of 2×10 ³ Kg/cm ²
A soft plastic and a hard plastic of less than The parison is extruded from an extrusion die as a parison, and when the parison is held in a split mold that has a flexible wall molding cavity and an integral structural member molding cavity with a mouth part etc. inside, the soft plastic is flexible. A rigid plastic is placed in the molded cavity with a solid wall so as to correspond to the molded cavity of the integral structure, and then pressurized fluid is introduced into the parison to expand the parison in the mold and mold it into the shape of the cavity. A hard unitary structural member having a part etc. is integrally formed with a soft flexible surface,
A method for producing a container with a flexible wall surface, such as a cleaning liquid tank for an automobile window cleaning device or a parenteral drug container for medical use, which has excellent flexibility as a whole and also has a connection with a flexible part. Containers that require a mouth, bracket, handle, etc. with high mechanical strength can be manufactured in one piece by blow molding, and when holding the parison in a mold,
By pinching both sides of the parison perpendicular to the extrusion direction with the pinch-off portions of the mold, the parison can be properly positioned and expanded within the cavity, allowing containers with respective characteristics to be placed in desired locations. can be manufactured.

本発明において容器の可撓性壁面及び一体構造
部材にそれぞれ使用する熱可塑性プラスチツクの
材料及び組合せは、容器の使用態様に応じて任意
に選択できるものであり、可撓性壁面に使用する
軟質の熱可塑性プラスチツクとしては、低密度ポ
リエチレン、中密度ポリエチレン、エチレン一酢
酸ビニル共重合体（酢酸ビニル含有量10％以上）、
アイオノマー、軟質ポリ塩化ビニル、エチレン一
プロピレン系エラストマー、スチレン−ブダジエ
ン系エラストマー、ポリエステル系エラストマ
ー、ポリアミド系エラストマー及びこれらのブレ
ンド体で、その引張弾性率（ASTM−Ｄ−638）
ESは十分な可撓性を得るために２×10³Kg／cm²未
満、望ましくは1.5×10³Kg／cm²以下である。一
方、一体構造部材に使用する硬質の熱可塑性プラ
スチツクとしては中密度ポリエチレン、高密度ポ
リエチレン、エチレン一酢酸ビニル共重合体（酢
酸ビニル含有量10％未満）、アイオノマー、硬質
塩化ビニル、ポリエステル、ポリウレタン、ポリ
アミド及びこれらのエラストマーならびにブレン
ド体で、その引張弾性率EHは構造部材としての
形状保持性を得るために２×10³Kg／cm²以上、望
ましくは2.5×10³Kg／cm²以上である。 In the present invention, the materials and combinations of thermoplastics used for the flexible walls and integral structural members of the container can be arbitrarily selected depending on the manner in which the container is used. Thermoplastics include low density polyethylene, medium density polyethylene, ethylene monovinyl acetate copolymer (vinyl acetate content 10% or more),
Ionomer, soft polyvinyl chloride, ethylene-propylene elastomer, styrene-butadiene elastomer, polyester elastomer, polyamide elastomer, and blends thereof, their tensile modulus (ASTM-D-638)
The ES is less than 2×10 ³ Kg/cm ² , preferably less than 1.5×10 ³ Kg/cm ² in order to obtain sufficient flexibility. On the other hand, hard thermoplastic plastics used for integral structural members include medium density polyethylene, high density polyethylene, ethylene monovinyl acetate copolymer (vinyl acetate content less than 10%), ionomer, hard vinyl chloride, polyester, polyurethane, The tensile modulus EH of polyamide, these elastomers, and blends is 2×10 ³ Kg/cm ² or more, preferably 2.5×10 ³ Kg/cm ² or more in order to obtain shape retention as a structural member. .

〔Example〕

本発明の実施例として自動車窓用洗浄装置の洗
浄液タンクの製造方法を第１図及至第４図に基づ
き説明する。 DESCRIPTION OF THE PREFERRED EMBODIMENTS As an embodiment of the present invention, a method for manufacturing a cleaning liquid tank for an automobile window cleaning device will be described with reference to FIGS. 1 to 4.

図中１は本発明の製造方法にて得られる自動車
窓用洗浄液タンクであり、Ａは軟質の熱可塑性プ
ラスチツクからなる可撓性壁面、Ｂは硬質の熱可
塑性プラスチツクからなる一体構造部材である。
一体構造部材Ｂの部分には、洗浄液の注入口２、
形状保持枠３、注出パイプ８が取付けられる洗浄
液の注出口４、洗浄液をタンク内から自動車窓に
供給するためのポンプ取付用リセス５及びタンク
自体の取付ブラケツト６が形成されている。７は
ブロー成形時パーテイングライン上に位置する補
強リブである。そして可撓性壁面Ａは洗浄液の量
によつて膨張および減少方向に変形し、タンク１
自体は両側の形状保持枠３によつて全体形状が維
持される。以下、第１図のタンク１の製造方法を
第２図及至第４図に基づき説明するに、９は押出
ダイ（図示せず）から押出された筒状のパリス
ン、１０は分割形式の一対の金型であり、金型１
０内には可撓性壁面成形キヤビテイ１１Ａと一体
構造部材成形キヤビテイ１１Ｂが形成され、一体
構造部材成形キヤビテイ１１Ｂには注入口、形状
保持枠、注出口、ポンプ取付用リセス、ブラケツ
トのヤビテイ、１１２Ｂ，１１３Ｂ，１１４Ｂ，
１１５Ｂ，１１６Ｂが形成され、また可撓性壁面
成形キヤビテイ１１Ａと一体構造部材成形キヤビ
テイ１１Ｂの外周には、補強リブ成形用圧縮部１
１７が形成されている。まず、軟質プラスチツク
と硬質プラスチツクをそれぞれ別々の押出機にて
溶融混練し、上記プラスチツクを押出ダイ（図示
せず）内にて接合し、第２図に示す如き、金型１
０のパーテイングラインPLに対して対称でPLを
境界として対向する部分のプラスチツクが同質と
なるよう軟質プラスチツク９Ａと硬質プラスチツ
ク９Ｂが区分された筒状のパリスン９として押出
し、分割形式の金型１０を閉鎖してパリスン９を
保持する。このとき軟質プラスチツク９Ａが可撓
性壁面成形キヤビテイ１１Ａに、また硬質プラス
チツク９Ｂが一体構造部材成形キヤビテイ１１Ｂ
にそれぞれ対応するよう配置し、且つ、パリスン
９の押出方向及び押出方向と直交する両側の全周
を金型ピンチオフ部１２にて挾持し、補強リブ７
を圧縮して成形するとともに、パリスン９の位置
設定を行なう。ついで、パリスン９内に圧縮空気
等の圧力流体を導入して、パリスン９を金型１０
内で膨張させ、キヤビテイ１１の形状に成形す
る。ついで、成形品を冷却した後、金型１０を開
き、成形品の周囲に発生した余剰の鋳バリを除去
して、第１図に示すような自動車窓洗浄装置の洗
浄液タンク１が得られる。 In the figure, 1 is an automobile window cleaning liquid tank obtained by the manufacturing method of the present invention, A is a flexible wall made of soft thermoplastic, and B is an integral structural member made of hard thermoplastic.
The part of the integral structure member B has a cleaning liquid injection port 2,
A shape-retaining frame 3, a cleaning liquid spout 4 to which a spouting pipe 8 is attached, a pump mounting recess 5 for supplying the cleaning liquid from inside the tank to the automobile window, and a mounting bracket 6 for the tank itself are formed. 7 is a reinforcing rib located on the parting line during blow molding. The flexible wall surface A is deformed in the direction of expansion and contraction depending on the amount of cleaning liquid, and the tank 1
The overall shape is maintained by the shape retaining frames 3 on both sides. Hereinafter, the manufacturing method of the tank 1 shown in FIG. 1 will be explained based on FIGS. 2 to 4. Reference numeral 9 is a cylindrical parison extruded from an extrusion die (not shown), and 10 is a pair of split-type parisons. It is a mold, and mold 1
A flexible wall molded cavity 11A and an integral structural member molded cavity 11B are formed in the interior of the pump. , 113B, 114B,
115B and 116B are formed, and on the outer periphery of the flexible wall molding cavity 11A and the integral structure member molding cavity 11B, a compression part 1 for molding reinforcing ribs is formed.
17 is formed. First, a soft plastic and a hard plastic are melt-kneaded in separate extruders, and the plastics are joined in an extrusion die (not shown), and a mold 1 as shown in FIG.
A soft plastic 9A and a hard plastic 9B are extruded as a cylindrical parison 9, which is symmetrical with respect to the parting line PL of 0 and is divided into a soft plastic 9A and a hard plastic 9B so that the plastics in opposing parts with the PL as a boundary are of the same quality. is closed to hold parison 9. At this time, the soft plastic 9A is placed in the flexible wall molded cavity 11A, and the hard plastic 9B is placed in the integral structural member molded cavity 11B.
The reinforcing ribs 7
is compressed and molded, and the position of the parison 9 is set. Next, a pressure fluid such as compressed air is introduced into the parison 9, and the parison 9 is molded into the mold 10.
It is expanded within the cavity and molded into the shape of the cavity 11. Then, after cooling the molded product, the mold 10 is opened and excess cast flash generated around the molded product is removed to obtain a cleaning liquid tank 1 for an automobile window cleaning device as shown in FIG. 1.

第５図は本発明の製造方法で得られる容器の他
例である医療用の非経口薬液容器１３であり、可
撓性壁面Ａと一体構造部材Ｂからなる。可撓性壁
面Ａにはブロー成形時パーテイングライン上に位
置する補強リブ１４、容器自体の取付用孔１５が
形成され、一体構造部材Ｂには、注入口１６、注
出口１７及び形状を保持し湾曲変形可能な壁１８
が形成されている。 FIG. 5 shows a medical parenteral drug solution container 13, which is another example of the container obtained by the manufacturing method of the present invention, and is composed of a flexible wall surface A and an integral structural member B. The flexible wall surface A has a reinforcing rib 14 located on the parting line during blow molding, and a hole 15 for mounting the container itself, and the integral structural member B has an inlet 16, an outlet 17, and a container that retains its shape. Curved and deformable wall 18
is formed.

［発明の効果］本発明の製造方法によれば、上述の如く、自動
車窓用洗浄装置の洗浄液タンク、医療用の非経口
薬液容器のように、全体として可撓性に優れ、し
かも、可撓性壁面との接続において機械的強度の
大なる口部、ブラケツト、ハンドル等を要求され
る容器をブロー成形にて一体に製造することがで
き、さらに、所望の箇所にそれぞれの特性を備え
た容器を、多工程を必要とすることなく製造する
ことができる。[Effects of the Invention] As described above, the manufacturing method of the present invention has excellent flexibility as a whole, such as a cleaning liquid tank for an automobile window cleaning device or a parenteral drug solution container for medical use. Containers that require a mouth, bracket, handle, etc. with high mechanical strength when connected to a solid wall surface can be manufactured in one piece by blow molding, and the container can also be provided with each characteristic in the desired location. can be manufactured without requiring multiple steps.

[Brief explanation of drawings]

第１図は本発明に係る製造方法にて得られた自
動車窓用洗浄装置の洗浄液タンクの斜視図、第２
図及至第４図は本発明の製造方法を示すものであ
り、第２図はパリスンの横断面図、第３図は金型
をパーテイングライン方向からみた側面図、第４
図は金型の横断面図、第５図は本発明に係る製造
方法で得られる容器の他例である医療用の非経口
薬液容器の斜視図である。１：洗浄液タンク、２：注入口、３：形状保持
枠、４：注出口、Ａ：可撓性壁面、Ｂ：一体構造
部材、９：パリスン、１０：金型。 FIG. 1 is a perspective view of a cleaning liquid tank of an automobile window cleaning device obtained by the manufacturing method according to the present invention;
Figures 4 to 4 show the manufacturing method of the present invention, in which Figure 2 is a cross-sectional view of the parison, Figure 3 is a side view of the mold viewed from the parting line direction, and Figure 4 is a side view of the mold as viewed from the parting line direction.
The figure is a cross-sectional view of the mold, and FIG. 5 is a perspective view of a medical parenteral drug solution container, which is another example of the container obtained by the manufacturing method according to the present invention. 1: Cleaning liquid tank, 2: Inlet, 3: Shape retaining frame, 4: Outlet, A: Flexible wall surface, B: Integral structural member, 9: Parison, 10: Mold.

Claims

[Claims] 1. A soft plastic and a hard plastic having a tensile modulus of less than 2×10 ³ Kg/cm ² are melt-kneaded in separate extruders, and the soft and hard plastics are mixed in an extrusion die. It is extruded from an extrusion die as a plasticized cylindrical or two-sheet parison, and has a flexible wall molded cavity and an integral structural member molded cavity with a mouth part etc. inside. The parison is held in a split mold by placing the soft plastic in the flexible wall molding cavity and the hard plastic in the monolithic molding cavity, and then injecting pressurized fluid into the parison. The parison is introduced into the mold and expanded in the mold to form it into the shape of a cavity, thereby forming a hard integral structural member integrally equipped with a mouth portion etc. in series with a soft flexible wall surface. A method of manufacturing a container having a flexible wall surface. 2. The flexible wall surface according to claim 1, characterized in that when holding the parison in a split mold, both sides of the parison perpendicular to the extrusion direction are held by pinch-off parts of the mold. A method for manufacturing a container having