JPH0718579Y2 - Plastic moldings - Google Patents
Plastic moldingsInfo
- Publication number
- JPH0718579Y2 JPH0718579Y2 JP1989091232U JP9123289U JPH0718579Y2 JP H0718579 Y2 JPH0718579 Y2 JP H0718579Y2 JP 1989091232 U JP1989091232 U JP 1989091232U JP 9123289 U JP9123289 U JP 9123289U JP H0718579 Y2 JPH0718579 Y2 JP H0718579Y2
- Authority
- JP
- Japan
- Prior art keywords
- molded product
- seal
- seal portion
- shape
- plastic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Description
【考案の詳細な説明】 〈産業上の利用分野〉 本考案は、中空成形により成形されたプラスチック成形
品に関し、成形品シール部の接着強度が強くなるように
改良したプラスチック成形品に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial field of application> The present invention relates to a plastic molded product molded by hollow molding, and to a plastic molded product improved so that the adhesive strength of a seal portion of the molded product is increased.
〈従来技術及び考案が解決しようとする課題〉 中空成形によりプラスチック成形品を成形する際、底部
のシール部は、パリソンを金型で喰切ることにより設け
ていた。しかし、この方法により設けられた底部シール
部は、第３図に示した様にシール部の断面がストレート
な形状になっており、十分なシール面積が得られないた
めに、接着性の良くない樹脂を用いた場合、シール部が
剥離しやすいという課題があった。また、第４図に示し
た様に十分なシール面積を得ようとして、底部のシール
部をシール部の断面がストレートな状態のまま下方に突
出させると、シール部の先端が成形品の接地点よりも突
出しないようにするために、成形品を底上げしなければ
ならず、そうすると、成形時、成形品が金型から離型し
にくいという課題があった。<Problems to be Solved by Prior Art and Invention> When a plastic molded product is molded by hollow molding, the bottom seal part is provided by cutting the parison with a mold. However, since the bottom seal portion provided by this method has a straight cross section as shown in FIG. 3 and a sufficient seal area cannot be obtained, the adhesion is not good. When a resin is used, there is a problem that the seal portion is easily peeled off. Also, as shown in FIG. 4, when the bottom seal part is projected downward with the cross section of the seal part being straight in order to obtain a sufficient seal area, the tip of the seal part is the ground point of the molded product. In order to prevent the molded product from protruding further, the molded product has to be raised to the bottom, which causes a problem that the molded product is difficult to release from the mold during molding.
〈課題を解決するための手段〉 本考案は、上記課題を解決するためになされたもので、
中空成形により成形され、底部が内側に膨出した凹部を
有するプラスチック成形品であって、該底部の成形品シ
ール部を、成形品シール部の断面が底部の外側に、横向
きＵ字型に突出させた形状にしたプラスチック成形品を
開示することにより解決し得たものである。<Means for Solving the Problems> The present invention has been made to solve the above problems.
What is claimed is: 1. A plastic molded product which is molded by hollow molding and has a recessed portion whose bottom portion bulges inward. The problem can be solved by disclosing a plastic molded product having the above shape.
次に図面をもとにして本考案のプラスチック成形品を説
明する。Next, the plastic molded product of the present invention will be described with reference to the drawings.
第１図は本考案のプラスチック成形品の全体の断面図で
ある。本考案のプラスチック成形品は、口部１、肩部
２、胴部３、底部４、成形品シール部５等から成る。第
２図は、成形品シール部５の断面拡大図である。成形品
シール部５は、断面が横向きＵ字型の形状をしており、
該成形品シール部５の略中央にシール部６が設けられて
おり、シール部６の断面形状は成形品シール部５の断面
形状と同じである。FIG. 1 is a sectional view of the entire plastic molded product of the present invention. The plastic molded product of the present invention comprises a mouth part 1, a shoulder part 2, a body part 3, a bottom part 4, a molded product sealing part 5 and the like. FIG. 2 is an enlarged cross-sectional view of the molded product seal portion 5. The molded product seal portion 5 has a U-shaped cross section.
A seal portion 6 is provided substantially in the center of the molded product seal portion 5, and the sectional shape of the seal portion 6 is the same as the sectional shape of the molded product seal portion 5.
本考案において、成形品シール部とは、成形品の底部に
おいて、プラスチック成形品の底部を接着するために、
底部の下方に突出した部分の全体を指し、また、シール
部とは、成形品の底部において、樹脂と樹脂とが密着し
ている面の全体を指す。In the present invention, the term "molded product seal portion" means that the bottom of a molded product is bonded to the bottom of a plastic molded product.
The bottom part refers to the entire part that protrudes downward, and the seal part refers to the entire surface of the bottom of the molded product where the resins are in close contact with each other.
また、横向きＵ字型に突出させたとは、成形品シール部
を波型にした形状を指す。この場合、Ｕ字の先端（Ｕ字
の底部、すなわち曲がっているところ）は、必ずしも曲
線状である必要はなく、第５図に示した様に鋭角状、別
の言葉で言うなら、Ｖ字状であっても構わない。In addition, the term "sideways protruding in a U-shape" refers to a shape in which the molded product seal portion is corrugated. In this case, the tip of the U-shape (the bottom of the U-shape, that is, the curved portion) does not necessarily have to be a curved shape, as shown in FIG. 5, it is an acute angle, or in other words, a V-shape. It does not matter if it is in the shape of a letter.
〈作用〉 本考案のプラスチック成形品は、底部の成形品シール部
のシール部断面の形状を横向きＵ字型にし、しかも成形
品の底部は内側に向かって膨出した凹部となっているの
でシール部の面積を十分得ることができ、また、成形品
を従来のように大きく底上げしなくても成形品シール部
の先端が成形品の接地部よりも突出することはない。<Operation> In the plastic molded product of the present invention, the cross-section of the seal part of the molded product at the bottom has a U-shaped cross section, and the bottom of the molded product is a concave portion that bulges inward. It is possible to obtain a sufficient area of the part, and the tip of the molded product sealing portion does not protrude beyond the grounded part of the molded product even if the molded product is not greatly raised as in the conventional case.
〈実施例〉 次に本考案のプラスチック成形品の一実施例を説明す
る。<Example> Next, an example of the plastic molded article of the present invention will be described.
本考案のプラスチック成形品の一実施例として、ポリプ
ロピレン（PP）〔三井石油化学B-278〕／接着剤層〔QB-
540〕／エチレンビニルアルコール（EVAL）〔EPF-101〕
の３層構成を有し、底部の形状が第２図に示した様な、
重量27.9gの容器を成形した。得られた容器の底部を、1
5mmに切断し、テンシロンにて引張試験を行った。ま
た、比較例として、同じ層構成で、底部の形状が第４図
に示した様に成形品シール部を底部の下方に突出させ、
かつシール部の断面をストレートである重量26.9gの容
器を成形し、成形品の試験を同じ方法で行った。その結
果を表１に示す。As an example of the plastic molded article of the present invention, polypropylene (PP) [Mitsui Petrochemical B-278] / adhesive layer [QB-
540] / Ethylene vinyl alcohol (EVAL) [EPF-101]
It has a three-layer structure and the shape of the bottom is as shown in FIG.
A container weighing 27.9 g was molded. Place the bottom of the resulting container in 1
It was cut into 5 mm and a tensile test was conducted with Tensilon. In addition, as a comparative example, with the same layer structure, the shape of the bottom portion is such that the molded product seal portion is projected below the bottom portion,
In addition, a container having a weight of 26.9 g having a straight cross section of the seal portion was molded, and the molded product was tested by the same method. The results are shown in Table 1.
〈考案の効果〉 本考案のプラスチック成形品は、底部の成形品シール部
に横向きＵ字型に突出した形を有しており、シール部の
面積が広くなり、シール部に高い接着強度を得ることが
できる。したがって、シール性があまり良くない樹脂を
用いた際でも、確実に底部シールに高い接着強度を得る
ことが出来る。 <Effect of the Invention> The plastic molded product of the present invention has a U-shaped laterally protruding shape at the bottom seal part of the molded product, which increases the area of the seal part and obtains high adhesive strength to the seal part. be able to. Therefore, even when a resin having a poor sealing property is used, it is possible to reliably obtain a high adhesive strength for the bottom seal.
また、成形品を従来のように大きく底上げしなくても成
形品シール部の先端が成形品の接地部よりも突出するこ
とはない。In addition, the tip of the molded product seal portion does not protrude beyond the grounded portion of the molded product even if the molded product is not greatly raised as in the conventional case.
図面は、本考案のを示し、第１図は、本考案のプラスチ
ック成形品の全体の断面図、第２図は、成形品シール部
の拡大断面図、第３図、第４図は従来の成形品シール部
の断面図、第５図は成型品シール部の別形状を示す断面
図である。 １……口部、２……肩部 ３……胴部、４……底部 ５……成形品シール部 ６……シール部The drawings show the present invention, FIG. 1 is an overall sectional view of a plastic molded product of the present invention, FIG. 2 is an enlarged sectional view of a molded product sealing portion, and FIGS. 3 and 4 are conventional sectional views. FIG. 5 is a sectional view of the molded product seal portion, and FIG. 5 is a sectional view showing another shape of the molded product seal portion. 1 ... Mouth part, 2 ... shoulder part 3 ... body part, 4 ... bottom part 5 ... molded product seal part 6 ... seal part
Claims (1)
出した凹部を有するプラスチック成形品であって、該底
部の成形品シール部を、成形品シール部の断面が底部の
外側に、横向きＵ字型に突出させた形状にしたことを特
徴とするプラスチック成形品。1. A plastic molded product which is molded by hollow molding and has a concave portion whose bottom portion bulges inward. The molded product seal portion of the bottom portion is laterally oriented with the cross section of the molded product seal portion being outside the bottom portion. A plastic molded product characterized by having a U-shaped protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989091232U JPH0718579Y2 (en) | 1989-08-02 | 1989-08-02 | Plastic moldings |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1989091232U JPH0718579Y2 (en) | 1989-08-02 | 1989-08-02 | Plastic moldings |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0332013U JPH0332013U (en) | 1991-03-28 |
| JPH0718579Y2 true JPH0718579Y2 (en) | 1995-05-01 |
Family
ID=31640731
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1989091232U Expired - Lifetime JPH0718579Y2 (en) | 1989-08-02 | 1989-08-02 | Plastic moldings |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0718579Y2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3907186B2 (en) * | 2002-07-30 | 2007-04-18 | 株式会社吉野工業所 | Blow molding container and molding method thereof |
| JP6562594B2 (en) * | 2013-11-27 | 2019-08-21 | キョーラク株式会社 | Delamination container |
| CN109808980B (en) * | 2013-11-27 | 2020-09-15 | 京洛株式会社 | Laminated peeling container |
| JP6396191B2 (en) * | 2014-11-28 | 2018-09-26 | 株式会社吉野工業所 | Double container |
| JP6385259B2 (en) * | 2014-11-28 | 2018-09-05 | 株式会社吉野工業所 | Double container |
| JP6396192B2 (en) * | 2014-11-28 | 2018-09-26 | 株式会社吉野工業所 | Double container |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5529432A (en) * | 1978-08-10 | 1980-03-01 | Mitsubishi Chem Ind | Blowwmolded container and mold for same |
-
1989
- 1989-08-02 JP JP1989091232U patent/JPH0718579Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0332013U (en) | 1991-03-28 |
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