JPH0624762B2 - Method of manufacturing flanged container by blow molding - Google Patents
Method of manufacturing flanged container by blow moldingInfo
- Publication number
- JPH0624762B2 JPH0624762B2 JP62177209A JP17720987A JPH0624762B2 JP H0624762 B2 JPH0624762 B2 JP H0624762B2 JP 62177209 A JP62177209 A JP 62177209A JP 17720987 A JP17720987 A JP 17720987A JP H0624762 B2 JPH0624762 B2 JP H0624762B2
- Authority
- JP
- Japan
- Prior art keywords
- parison
- pair
- resin
- mold
- container
- 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 - Fee Related
Links
- 238000000071 blow moulding Methods 0.000 title claims description 10
- 238000004519 manufacturing process Methods 0.000 title claims description 9
- 239000011347 resin Substances 0.000 claims description 41
- 229920005989 resin Polymers 0.000 claims description 41
- 238000000034 method Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/4802—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/42—Component parts, details or accessories; Auxiliary operations
- B29C49/48—Moulds
- B29C49/4802—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity
- B29C2049/4805—Moulds with means for locally compressing part(s) of the parison in the main blowing cavity by closing the mould halves
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は吹込成形によるフランジ、特に広巾、厚肉フラ
ンジ、付容器の製造方法に関する。TECHNICAL FIELD The present invention relates to a method for producing a flange by blow molding, particularly a wide width, a thick flange, and a container with a cover.
従来、吹込成形によるフランジ付容器の製造において
は、一般に、例えば第４図（Ａ），（Ｂ）に示すよう
に、内面にフランジ型面11b,11bを含む容器型面11a,11a
を形成した間隔を置いた一対の金型11,11の間にダイス1
2よりパリソン14を降下させ、一対の金型11,11を圧接さ
せ、パリソン14内に空気管15より矢印Ａで示すように空
気を吹込み、パリソン14を容器型面11a,11aに沿って膨
張させてフランジ付容器16を成形していた。この場合、
フランジ型面11b,11bは他の部分より大径であるためパ
リソン14は大きく伸長され、従って、例えば第４図
（Ｃ）に示すように、容器16のフランジ部16aは薄肉と
なっていた。フランジ部16aの巾を大きくすれば、その
厚さは、一層薄くなることとなる。Conventionally, in the manufacture of a flanged container by blow molding, as shown in, for example, FIGS. 4 (A) and 4 (B), in general, container mold surfaces 11a, 11a including flange mold surfaces 11b, 11b on the inner surface are generally used.
Die 1 between a pair of dies 11 and 11 that form a space
The parison 14 is lowered from 2 and the pair of molds 11 and 11 are brought into pressure contact with each other, and air is blown into the parison 14 from the air pipe 15 as shown by an arrow A, so that the parison 14 is moved along the container mold surfaces 11a and 11a. It was expanded to form the flanged container 16. in this case,
Since the flange mold surfaces 11b and 11b have a larger diameter than the other portions, the parison 14 is greatly extended, and therefore the flange portion 16a of the container 16 is thin as shown in FIG. 4 (C), for example. If the width of the flange portion 16a is increased, the thickness will be further reduced.
上述した従来の吹込成形によるフランジ付容器の製造方
法では、広巾かつ厚肉のフランジを有する容器の製造は
極めて困難で、不可能に近かった。According to the conventional method of manufacturing a flanged container by blow molding described above, it is extremely difficult and almost impossible to manufacture a container having a wide and thick flange.
本発明は、上記問題点を克服し、広巾かつ厚肉のフラン
ジを、吹込成形により均一な厚さで成形可能な、フラン
ジ付容器の製造方法を提供することを目的とするもので
ある。SUMMARY OF THE INVENTION It is an object of the present invention to overcome the above problems and provide a method of manufacturing a flanged container capable of forming a wide and thick flange with a uniform thickness by blow molding.
上記目的を達成するため本発明は、吹込成形によりフラ
ンジ付容器を製造するに際し、左右一対の対向して移動
する上型と、該上型に下方より圧接可能な、中央部に樹
脂止めコアーが形成されるとともに、該樹脂止めコアー
の周囲に、上面に複数の樹脂逃し溝が配設された外壁部
を有する環状の溝形の樹脂溜が形成された下型とを使用
し、 前記一対の上型および下型をを互いに離間した状態にお
いて前記一対の上型間からパリソンを末広がりに下降さ
せ、該パリソンの下部を前記樹脂溜の上方に位置させた
状態で前記一対の上型同士を圧接すると同時に前記下型
を前記一対の上型の下部に圧接し、前記パリソン中へ空
気を吹込むことを特徴とする。In order to achieve the above object, the present invention, when manufacturing a container with a flange by blow molding, a pair of left and right upper molds that move in opposition, and a resin stopper core in the central portion that can be pressed against the upper mold from below. A lower mold formed with an annular groove-shaped resin reservoir having an outer wall portion having a plurality of resin escape grooves arranged on the upper surface is formed around the resin stopper core, With the upper mold and the lower mold separated from each other, the parison is lowered downward from between the pair of upper molds, and the pair of upper molds are pressure-welded with each other while the lower part of the parison is positioned above the resin reservoir. At the same time, the lower mold is pressed against the lower parts of the pair of upper molds, and air is blown into the parison.
パリソンの下部を下型の樹脂溜の上方に位置させた状態
で一対の上型同士および下型を互いに圧接することで、
樹脂溜の上方に位置するパリソンは各上型と下型に圧接
されて樹脂溜内に容器のフランジが形成され、また、パ
リソン中へ空気を吹き込むことで、上型内で容器の側部
および底部が形成される。このとき、樹脂溜内で余分と
なったパリソンおよび樹脂溜内の空気は、下型の外壁部
に設けられた各樹脂逃し溝から型外へ逃げることができ
るので、フランジは平滑でかつ均一な厚さに形成され
る。By pressing the pair of upper molds and the lower mold together with the lower part of the parison positioned above the lower mold resin reservoir,
The parison located above the resin reservoir is pressed against the upper and lower molds to form the flange of the container in the resin reservoir, and by blowing air into the parison, the side of the container inside the upper mold and The bottom is formed. At this time, excess parison in the resin reservoir and air in the resin reservoir can escape to the outside of the mold from the resin escape grooves provided in the outer wall of the lower mold, so that the flange is smooth and uniform. Formed to a thickness.
つぎに、本発明を実施例により図面を参照して説明す
る。第１図（Ａ），（Ｂ）は本発明の一実施例説明のた
めの断面図である。これらの図において、本発明におい
て使用される装置は一対の上型１，１、上型１，１の上
部に配設されパリソン４を上型１，１内に供給するダイ
ス２、上型１，１の下部に配設されシリンダ（不図示）
により昇降可能な下型３を有する。一対の上型１，１の
内面には容器型面11a,11aが形成され、下型３にはこれ
を貫通して上部に開口する空気管５が装着される。下型
３の上面中央には樹脂止めコアー３ａが形成され、樹脂
止めコアー３ａの周囲には環状溝形の樹脂溜３ｂが形成
され、樹脂溜３ｂの外周には外壁部３ｃが形成される。
さらに、第２図に示すように、外壁部３ｃの上面には複
数の樹脂逃し溝３ｄが配設されている。また樹脂溜３ｂ
の底面に、必要に応じて溝もしくは突状部３ｅを配置し
てもよい。Next, the present invention will be described by way of examples with reference to the drawings. 1 (A) and 1 (B) are sectional views for explaining one embodiment of the present invention. In these figures, the apparatus used in the present invention is a pair of upper molds 1, 1, a die 2 arranged on the upper molds 1, 1 for supplying a parison 4 into the upper molds 1, 1, an upper mold 1. , A cylinder arranged under 1 (not shown)
It has a lower mold 3 that can be moved up and down. Container mold surfaces 11a, 11a are formed on the inner surfaces of the pair of upper molds 1, 1, and an air tube 5 is attached to the lower mold 3 so as to penetrate therethrough and open to the upper part. A resin stopper core 3a is formed in the center of the upper surface of the lower mold 3, an annular groove-shaped resin reservoir 3b is formed around the resin stopper core 3a, and an outer wall portion 3c is formed on the outer periphery of the resin reservoir 3b.
Further, as shown in FIG. 2, a plurality of resin escape grooves 3d are provided on the upper surface of the outer wall portion 3c. Also, the resin reservoir 3b
If necessary, grooves or protrusions 3e may be arranged on the bottom surface of the.
第１図（Ａ），（Ｂ），第２図および第３図を参照し
て、本発明の一実施例を説明す。第１図（Ａ）に示すよ
うに、ダイス２よりパリソン４が左右に離間した一対の
上型１，１の間に供給される。この時パリソン４は下端
部で末広がりになるように広げられる。パリソン４を広
げる手段として、人手による方法あるいは拡幅装置（図
示せず）が使用可能である。末広がりに形成されたパリ
ソン４の下端部は下型３の樹脂溜3bをこえて外壁部3c上
に来る。この際第３図に示すように、樹脂溜３ｂの幅Ａ
とこれに対応するパリソン４の長さＢとの関係はB/A＞
1.5であることが望ましい。つぎに第１図(B)に示すよう
に、一対の上型１，１を矢印Ｐ，Ｐで示すように対向し
て移動圧接すると同時に、下型３を、矢印Ｑで示すよう
に、上昇させ上型１，１と圧接し、その後空気管５より
上下型１，１，３内のパリソン中に空気を吹込む。これ
により、上型１内ではパリソン４が容器型面１１ａに押
し付けられるとともに、樹脂溜３ｂの上方に位置するパ
リソン４は各上型１と下型３に圧接されて、第１図
（Ｂ）に示すように、フランジ６ａを有する容器６が形
成される。このとき、樹脂溜３ｂ内で余分となったパリ
ソン４は、各樹脂逃し溝３ｄ（第２図参照）からプレス
効果を保ちつつ型外へ逃げる。さらに、樹脂溜３ｂ内の
空気も各樹脂逃し溝３ｄから型外へ逃げ、樹脂溜３ｂの
脱気が行なわれる。これにより、フランジ６ａは平滑で
かつ均一な厚さに形成される。容器６のフランジ６ａは
樹脂溜３ｂ内で成形されるので、樹脂溜深さ（側壁部高
さ）ｈ，樹脂溜巾Ａ，パリソン長さＢを任意に選択する
ことにより、フランジ６ａの巾、厚さを任意に形成する
ことができる。この場合樹脂止めコアー３の垂直高さＬ
は側壁部高さｈより大きくする必要がある。An embodiment of the present invention will be described with reference to FIGS. 1 (A), (B), FIG. 2 and FIG. As shown in FIG. 1 (A), a parison 4 is supplied from a die 2 between a pair of upper dies 1 and 1 which are separated from each other in the left and right directions. At this time, the parison 4 is unfolded so that it spreads toward the bottom end. As a means for unfolding the parison 4, a manual method or a widening device (not shown) can be used. The lower end portion of the parison 4 formed in a divergent shape goes over the resin reservoir 3b of the lower mold 3 and comes to the outer wall portion 3c. At this time, as shown in FIG. 3, the width A of the resin reservoir 3b is
And the corresponding length B of parison 4 is B / A>
It is preferably 1.5. Next, as shown in FIG. 1 (B), the pair of upper molds 1 and 1 are moved and pressed against each other as indicated by arrows P and P, and at the same time, the lower mold 3 is raised as indicated by arrow Q. Then, the upper molds 1, 1 are brought into pressure contact with each other, and then air is blown into the parison in the upper and lower molds 1, 1, 3 from the air pipe 5. As a result, the parison 4 is pressed against the container mold surface 11a in the upper mold 1, and the parison 4 located above the resin reservoir 3b is pressed into contact with the upper mold 1 and the lower mold 3, respectively. As shown in, the container 6 having the flange 6a is formed. At this time, the extra parison 4 in the resin reservoir 3b escapes to the outside of the mold while maintaining the pressing effect from the resin escape grooves 3d (see FIG. 2). Further, the air in the resin reservoir 3b also escapes from the mold through the resin escape grooves 3d, and the resin reservoir 3b is degassed. As a result, the flange 6a is formed to have a smooth and uniform thickness. Since the flange 6a of the container 6 is molded in the resin reservoir 3b, the width of the flange 6a can be set by arbitrarily selecting the resin reservoir depth (sidewall height) h, the resin reservoir width A, and the parison length B. The thickness can be arbitrarily formed. In this case, the vertical height L of the resin stopper core 3
Needs to be larger than the side wall height h.
以上説明したように、本発明は対向して移動する一対の
上型と、中央部に樹脂止めコアーが形成されるととも
に、樹脂止めコアーの周囲に、上面に複数の樹脂逃し溝
が配設された外壁部を有する環状の溝形の樹脂溜が形成
された下型とを用い、上下型内で吹込成形をすることに
より、樹脂溜内の余分なパリソンおよび空気を各樹脂逃
し溝から型外へ逃すことができる。これにより、広巾か
つ厚肉のフランジを有する容器であっても、フランジを
平滑でかつ均一な厚さで成形することができる。As described above, according to the present invention, a pair of upper molds that move oppositely to each other, a resin stopper core is formed in the central portion, and a plurality of resin escape grooves are provided on the upper surface around the resin stopper core. By using a lower mold with an annular groove-shaped resin reservoir having an outer wall part and blow molding in the upper and lower molds, excess parison and air in the resin reservoir are removed from each resin escape groove from the mold. Can be missed. As a result, even in the case of a container having a wide and thick flange, the flange can be molded with a smooth and uniform thickness.
第１図（Ａ），（Ｂ）は本発明の一実施例説明のための
装置の断面図、第２図は本発明に使用される下型の一実
施例の部分拡大斜視図、第３図は本発明の一実施例説明
のための部分拡大図、第４図（Ａ），（Ｂ），（Ｃ）は
従来の吹込成形説明のための断面図である。 １，１…上型、２…ダイス、 ３…下型、３ｂ…樹脂溜、 ４…パリソン、５…空気管、 ６…容器、６ａ…フランジ。1 (A) and 1 (B) are sectional views of an apparatus for explaining an embodiment of the present invention, FIG. 2 is a partially enlarged perspective view of an embodiment of a lower mold used in the present invention, and FIG. FIG. 4 is a partially enlarged view for explaining an embodiment of the present invention, and FIGS. 4 (A), (B), and (C) are sectional views for explaining conventional blow molding. 1, 1 ... Upper mold, 2 ... Die, 3 ... Lower mold, 3b ... Resin reservoir, 4 ... Parison, 5 ... Air tube, 6 ... Container, 6a ... Flange.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−78720（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-60-78720 (JP, A)
Claims (1)
に際し、左右一対の対向して移動する上型と、該上型に
下方より圧接可能な、中央部に樹脂止めコアーが形成さ
れるとともに、該樹脂止めコアーの周囲に、上面に複数
の樹脂逃し溝が配設された外壁部を有する環状の溝形の
樹脂溜が形成された下型とを使用し、 前記一対の上型および下型をを互いに離間した状態にお
いて前記一対の上型間からパリソンを末広がりに下降さ
せ、該パリソンの下部を前記樹脂溜の上方に位置させた
状態で前記一対の上型同士を圧接すると同時に前記下型
を前記一対の上型の下部に圧接し、前記パリソン中へ空
気を吹込むことを特徴とする吹込成形によるフランジ付
容器の製造方法。1. When manufacturing a container with a flange by blow molding, a pair of left and right upper dies that are opposed to each other and a resin stopper core that can be pressed against the upper dies from below are formed in the central portion. A lower mold having an annular groove-shaped resin reservoir having an outer wall portion on the upper surface of which a plurality of resin escape grooves are arranged is formed around the resin stopper core, and the pair of upper mold and lower mold are used. The parison is lowered from the space between the pair of upper molds in a state of being separated from each other, and the pair of upper molds are pressure-contacted with each other while the lower part of the parison is positioned above the resin reservoir. Is pressed against the lower parts of the pair of upper molds, and air is blown into the parison. A method for manufacturing a flanged container by blow molding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62177209A JPH0624762B2 (en) | 1987-07-17 | 1987-07-17 | Method of manufacturing flanged container by blow molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62177209A JPH0624762B2 (en) | 1987-07-17 | 1987-07-17 | Method of manufacturing flanged container by blow molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6422528A JPS6422528A (en) | 1989-01-25 |
| JPH0624762B2 true JPH0624762B2 (en) | 1994-04-06 |
Family
ID=16027078
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62177209A Expired - Fee Related JPH0624762B2 (en) | 1987-07-17 | 1987-07-17 | Method of manufacturing flanged container by blow molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0624762B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2397851A1 (en) * | 2001-08-13 | 2003-02-13 | David Johnson | Method and apparatus for extrusion blow molding of shapes with an even wall thickness and varying radii |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6078720A (en) * | 1983-10-05 | 1985-05-04 | Showa Denko Kk | Forming of container with flanged edge |
-
1987
- 1987-07-17 JP JP62177209A patent/JPH0624762B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6422528A (en) | 1989-01-25 |
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