JPS5962127A - Manufacture of plastic container by injection molding - Google Patents
Manufacture of plastic container by injection moldingInfo
- Publication number
- JPS5962127A JPS5962127A JP17379482A JP17379482A JPS5962127A JP S5962127 A JPS5962127 A JP S5962127A JP 17379482 A JP17379482 A JP 17379482A JP 17379482 A JP17379482 A JP 17379482A JP S5962127 A JPS5962127 A JP S5962127A
- Authority
- JP
- Japan
- Prior art keywords
- plastic container
- cavity
- container
- fitting
- lid
- 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.)
- Pending
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
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は射出成形プラスデック容器、特に上縁の横向き
フランジ外周縁に蓋嵌合用の立上り部を有する射出成形
プラスチック容器のツＩｋ造法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an injection molded plastic container, particularly to a method of manufacturing an injection molded plastic container having a raised portion for fitting a lid on the outer peripheral edge of a transverse flange on the upper edge.
従来、この種のプラスチック容器の射出成形は、容器上
縁の横向きフランジ外周縁の蓋嵌合用立上り部相当部位
の成形キャビティがキャビテイ軸線と平行になった成形
金型を用いて行われるため問題があった。即ちこの従来
法では容器の蓋嵌合用立上り部が、成形に伴う冷却収縮
で内傾状を呈する変形をし、蓋嵌合用立上り部の内径が
約８０ｒｒｒｎ程度の容器に於ても、ポリエヂレン樹脂
の場合のように収縮率が大きいプラスチックでは、蓋の
嵌合ができなくなるに至る。また収縮率自体が大きくな
いプラスチックの場合でも、経済性のため成形サイクル
を上げ過ぎると、冷却が不充分な同に成形品が部槽され
る結呆、それだけ離型された成形品の温度が高くなって
、大きな収縮変形を生じ、上記と同様な不都合を招くこ
とがある。Conventionally, injection molding of this type of plastic container has been carried out using a mold in which the molding cavity corresponding to the rising part for fitting the lid on the outer periphery of the horizontal flange on the upper edge of the container is parallel to the cavity axis. there were. That is, in this conventional method, the rising part for fitting the lid of the container is deformed into an inwardly inclined shape due to cooling shrinkage during molding, and even in a container where the inner diameter of the rising part for fitting the lid is about 80rrrn, the polyethylene resin is If the plastic has a large shrinkage rate as in the case, the lid will no longer be able to fit. In addition, even in the case of plastics whose shrinkage rate itself is not large, if the molding cycle is increased too much for economical reasons, cooling will be insufficient and the molded product will be left in the tank, causing the temperature of the molded product to increase accordingly. This may result in large shrinkage and deformation, resulting in the same inconvenience as described above.
本発明は上記先行技術による欠点を除去し、蓋の嵌合に
支障を来たすようなことがない射出成形プラスチック容
器の製造法を提供することを目的としている。The object of the present invention is to eliminate the drawbacks of the prior art described above and to provide a method for manufacturing injection molded plastic containers that does not interfere with the fitting of the lid.
本発明の射出成形プラスチック容器の製造法は、上縁の
横向きフランジ外周縁に蓋嵌合用の立上り部を有する射
出成形プラスデック容器の製造法であって、該立上り部
相当部位の成形キャビティがキャビディ軸線に対し１〜
８度外傾している成形金型を用いて射出成形することを
特徴としている。The method for manufacturing an injection molded plastic container of the present invention is a method for manufacturing an injection molded plastic container having a raised portion for fitting a lid on the outer peripheral edge of a horizontal flange at the upper edge, wherein the molding cavity at a portion corresponding to the raised portion is formed into a cavity. 1 to axis
It is characterized by injection molding using a mold that is tilted outward by 8 degrees.
成形品容器の蓋嵌合用立上り部相当部位がこのような特
定角度の外傾に設定された成形キャビティの金型を用い
てプラスデック容器を射出成形すると、容器」−縁の横
向きフランジ外周縁の蓋嵌合用立上り部は収縮が大きい
場合でも、該立上り部への蓋の嵌合に支障を来たすよう
な大きな内傾状変形を生じることがなく、“成形品と蓋
の互換性が保ＷＩＥされる。When a Plus Deck container is injection-molded using a mold with a molding cavity in which the portion corresponding to the rising part for fitting the lid of the molded product container is set to be inclined outward at a specific angle, the sideways flange on the edge of the container Even if the rising portion for fitting the lid undergoes large shrinkage, it will not undergo large inward deformation that would impede fitting of the lid to the rising portion, ensuring compatibility between the molded product and the lid. Ru.
以下、本発明の実施例を図面について説明する。Embodiments of the present invention will be described below with reference to the drawings.
図で（１）は射出成形用の雄型、（２）はその１１）（
型で、これ等型は、上縁に横向きフランジ（３）付きで
かつ該フランジ外周縁に蓋嵌合用の立上り部（４）のあ
るプラスチック容器（５）に対応する成形キャビティ（
６）を有する。成形キャビティ（６）の蓋１■合川立上
り部（４）相当部位（７）は、キャビテイ軸線に対し１
〜８度、より好ましくは２度前後外傾される。蓋嵌合用
立上り部（４）の上端に、先端に下向き部（９）付きの
横向き張出しフラレジ（８）を有する容器の場合には、
部位（７）の外側に対応して、下向き部（９）相当部位
Ｑｌの成形キャビティをキャビテイ軸線に対し外傾させ
、フランジ（８）相当部位Ｏυの成形キャビティをキャ
ビテイ軸線と直角に交わる平面に対し先下りに傾斜させ
ておくことが好ましい。部位ＯＩの外傾角度は約３度前
後、部位θυの先下り角度は約５度前後でよい。In the figure, (1) is a male mold for injection molding, and (2) is its 11) (
These molds have a molding cavity (5) corresponding to a plastic container (5) with a transverse flange (3) on the upper edge and a raised part (4) for fitting the lid on the outer periphery of the flange.
6). The part (7) corresponding to the lid 1 ■ Aikawa rising part (4) of the molding cavity (6) is 1 with respect to the cavity axis.
It is tilted outward by ~8 degrees, more preferably 2 degrees. In the case of a container that has a horizontally extending flanged register (8) with a downwardly facing portion (9) at the tip at the upper end of the lid fitting rising portion (4),
Corresponding to the outside of the part (7), the molding cavity of the part Ql corresponding to the downward part (9) is tilted outward with respect to the cavity axis, and the molding cavity of the part Oυ corresponding to the flange (8) is made into a plane perpendicular to the cavity axis. On the other hand, it is preferable that the tip is inclined downward. The outward inclination angle of the part OI may be about 3 degrees, and the downward angle of the tip of the part θυ may be about 5 degrees.
容器の蓋嵌合用立上り部相当部位が上記のような特定角
度の外径に設定された成形キャビティの金型を用いてプ
ラスチック容器を常法に従い射出成形することにより、
蓋嵌合用立上り部（４）に核部への蓋の嵌合に支障を来
たすような大きな内傾状変形を伴わないプラスチック容
器を得る。By injection molding a plastic container according to a conventional method using a mold with a molding cavity in which the part corresponding to the rising part for fitting the lid of the container is set to the outside diameter at a specific angle as described above,
To obtain a plastic container in which a rising part (4) for lid fitting does not have a large inward deformation that hinders fitting of the lid to the core part.
第１図は本発明の一実施例を示す縦断面図、第２図は第
１図の成形品の■部拡大図である。
（１）・・・雄型、 （２）・・・メ１１１型
、（３）・・・償向きフランジ、（４）・・・蓋嵌合用
の立上り部、（５）・・・射出成形プラスデック容器、
（６）−・・成形キャビティ、
（７）・・・成形キャビディの蓋嵌合用立上り部相当部
位、
（８）・・・下向き部付きの横向き張出しフランジ、（
９）・・・その下向き部、
す０・・・成形キャビディの下向き部相当部位、０す・
・・成形キャビティの横向き張出しフランジ相当部位。
（以上）FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and FIG. 2 is an enlarged view of the part 2 of the molded product shown in FIG. (1)...Male type, (2)...Male 111 type, (3)...Compensation flange, (4)...Rising part for lid fitting, (5)...Injection molding plus deck container,
(6) -- Molding cavity, (7) -- Portion equivalent to the rising part of the molding cavity for fitting the lid, (8) -- Sideways overhanging flange with downward part, (
9)...The downward part, 0...The part corresponding to the downward part of the molded cavity, 0.
...The part corresponding to the sideways overhanging flange of the molding cavity. (that's all)
Claims (1)
を有する射出成形プラスチック容器の製造法であって、
該立上り部相当部位の成形キャビティがキャビテイ軸線
に対し１〜８度、外傾している成形金型を用いて射出成
形することを特徴とする射出成形プラスチック容器の！
ｉ”Ｊ造法。■ A method for manufacturing an injection molded plastic container having a raised portion for fitting a lid on the outer peripheral edge of a horizontal flange on the upper edge, the method comprising:
An injection molded plastic container characterized in that injection molding is carried out using a molding die in which a molding cavity corresponding to the rising portion is inclined outward by 1 to 8 degrees with respect to the cavity axis!
i”J construction method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17379482A JPS5962127A (en) | 1982-10-01 | 1982-10-01 | Manufacture of plastic container by injection molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17379482A JPS5962127A (en) | 1982-10-01 | 1982-10-01 | Manufacture of plastic container by injection molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5962127A true JPS5962127A (en) | 1984-04-09 |
Family
ID=15967272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17379482A Pending JPS5962127A (en) | 1982-10-01 | 1982-10-01 | Manufacture of plastic container by injection molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5962127A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013240911A (en) * | 2012-05-21 | 2013-12-05 | Toyoda Gosei Co Ltd | Injection molding and mounting structure of injection molding |
-
1982
- 1982-10-01 JP JP17379482A patent/JPS5962127A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013240911A (en) * | 2012-05-21 | 2013-12-05 | Toyoda Gosei Co Ltd | Injection molding and mounting structure of injection molding |
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