JPH0420012Y2 - - Google Patents
Info
- Publication number
- JPH0420012Y2 JPH0420012Y2 JP9046385U JP9046385U JPH0420012Y2 JP H0420012 Y2 JPH0420012 Y2 JP H0420012Y2 JP 9046385 U JP9046385 U JP 9046385U JP 9046385 U JP9046385 U JP 9046385U JP H0420012 Y2 JPH0420012 Y2 JP H0420012Y2
- Authority
- JP
- Japan
- Prior art keywords
- preform
- mold
- holding mold
- cup
- shaped 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
Links
- 238000002347 injection Methods 0.000 description 12
- 239000007924 injection Substances 0.000 description 12
- 238000000465 moulding Methods 0.000 description 7
- 238000000071 blow moulding Methods 0.000 description 3
- 238000001746 injection moulding Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
Landscapes
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Description
【考案の詳細な説明】
（産業上の利用分野）
この考案は合成樹脂製のカツプ状容器を吹込成
形する場合に用いられるプリフオームに関するも
のである。[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a preform used when blow molding a cup-shaped container made of synthetic resin.
（従来の技術）
プリフオームを射出成形し、そのプリフオーム
の周縁を挾持した状態でカツプ状容器を延伸吹込
成形する場合、成形時にプリフオームの周縁が保
持型から抜け出すのを防止するために、周縁をア
ンダーカツト状に成形したり、または周縁の上下
面に多数の凹凸を形成している。(Prior art) When a preform is injection molded and a cup-shaped container is stretch blow molded with the periphery of the preform held between the preforms, the periphery is under-molded to prevent the periphery of the preform from slipping out of the holding mold during molding. It is formed into a cut shape, or has many irregularities formed on the upper and lower surfaces of the periphery.
このため保持型は成形後の離型を考慮して、割
り金型により作られている。 For this reason, the holding mold is made with a split mold in consideration of mold release after molding.
（考案が解決しようとする問題点）
割り金型による保持型では、保持型を開閉する
ための装置を必要とし、またプリフオームの周縁
を喰え込ませている関係上、離型時に周縁が損傷
するなどの問題があつた。そこで保持型を割らな
くとも、成形されたカツプ状容器を、上方へ抜き
出すことが試みられているが、この場合には保持
型にプリフオームを固定するものがないことか
ら、射出成形後に射出コアをプリフオームから抜
いたときに、その射出コアにプリフオームが付着
して、保持型から抜け出すことがしばしばあり、
プリフオームの成形に連続して容器への成形がで
きないことがあつた。(Problems to be solved by the invention) Holding molds using split molds require a device to open and close the holding mold, and since the periphery of the preform is bitten, the periphery is damaged when the mold is released. There were problems such as. Therefore, attempts have been made to pull out the molded cup-shaped container upward without breaking the holding mold, but in this case, since there is nothing to fix the preform to the holding mold, the injection core is removed after injection molding. When the preform is pulled out, the preform often sticks to the injection core and falls out of the holding mold.
There were cases in which it was not possible to continue forming the preform into a container.
（問題点を解決するための手段）
この考案は上記問題点を解決するために考えら
れたものであつて、その目的は射出コアの抜き取
り時に保持型からプリフオームが抜け出すのを防
止することができ、また容器成形後の離型時に
は、保持型からの抜き取りに何等支障を来たすこ
とがない係止手段を有するカツプ状容器のプリフ
オームを提供することにある。(Means for solving the problem) This invention was devised to solve the above problem, and its purpose is to prevent the preform from falling out of the holding mold when the injection core is extracted. Another object of the present invention is to provide a preform for a cup-shaped container that has a locking means that does not cause any trouble in removing the container from the holding mold when the container is released from the mold after molding.
上記目的によるこの考案は、底面積よりも開口
面積が大きく、かつ開口縁が外方へ突出したカツ
プ状容器のプリフオームであつて、上記開口縁の
下側面にプリフオームの保持型と係合する微細な
突起を形成してなることを特徴とするものであ
る。 This invention for the above-mentioned purpose is a cup-shaped container preform with an opening area larger than the bottom area and an opening edge protruding outward, and a microscopic container that engages with a holding mold of the preform on the lower surface of the opening edge. It is characterized by forming protrusions.
（作用）
上記構造では、微細な突条によつてプリフオー
ムが保持型と係合し、射出コアと共にプリフオー
ムが保持型の上方へ移動するのを防止する反面、
吹込成形時には周縁部を除いて生ずる延伸によつ
て微細な突条がなくなり、成形された容器は保持
型上方へと抜き出される。(Function) In the above structure, the preform engages with the holding mold by the fine protrusions, and prevents the preform from moving above the holding mold together with the injection core.
During blow molding, the fine protrusions are eliminated due to the stretching that occurs except for the peripheral edges, and the molded container is pulled out above the holding mold.
これを図示の例により更に詳説する。 This will be explained in more detail using illustrated examples.
（実施例）
図中１は扁平なプリフオームで、外方へ突出し
た開口縁２の下側面に、所要間隔を空けて0.1〜
0.3mm程度の微細な突起３が一体形成してある。(Example) In the figure, 1 is a flat preform, which is placed on the lower side of the opening edge 2 that protrudes outward with a required interval of 0.1~
Fine protrusions 3 of about 0.3 mm are integrally formed.
この突起３は第２図に示すように、プリフオー
ム１の射出成形時に、保持型４の開口縁に射出金
型５によつて形成される。またプリフオーム１の
開口縁２は、射出コア６と保持型４の内面との間
にて形成され、成形後に射出コア６を上方に移動
し、また射出金型５を下方へ移動すると、プリフ
オーム１は開口縁２と突起３とによつて保持型４
の開口周辺を挾持した状態にて、保持型４に残
る。 As shown in FIG. 2, the protrusion 3 is formed at the opening edge of the holding mold 4 by an injection mold 5 during injection molding of the preform 1. Furthermore, the opening edge 2 of the preform 1 is formed between the injection core 6 and the inner surface of the holding mold 4, and when the injection core 6 is moved upward and the injection mold 5 is moved downward after molding, the preform 1 The holding mold 4 is held by the opening edge 2 and the protrusion 3.
It remains in the holding mold 4 while holding the periphery of the opening.
このようなプリフオーム１を第３図に示すよう
に、吹込金型１０内にて延伸ロツド７により押し
延しながら、保持型４に嵌合した吹込コア８によ
り空気を吹込むと、上記突起３はプリフオーム１
の延伸と膨脹とによつて失なわれ、そこに成形さ
れたカツプ状容器９には、突起３は残らない。 As shown in FIG. 3, when such a preform 1 is stretched by a stretching rod 7 in a blow mold 10 and air is blown into it by a blow core 8 fitted into a holding mold 4, the projections 3 is preform 1
The protrusion 3 is lost due to the stretching and expansion of the protrusion 3, and no protrusion 3 remains in the cup-shaped container 9 formed thereon.
また成形によつて、保持型４の下側の突起３が
なくなるから、成形後にカツプ状容器９を保持型
４の上方に抜き取る際に、上記突起３が障害とな
るようなこともない。 Further, since the protrusion 3 on the lower side of the holding mold 4 is eliminated by molding, the protrusion 3 does not become an obstacle when the cup-shaped container 9 is pulled out above the holding mold 4 after molding.
（考案の効果）
この考案は上述のように、プリフオームに保持
型に係止され微細な突起を形成し、これによりプ
リフオームが保持型から外れるのを防止してなる
ものであるから、プリフオーム成形後に射出コア
を上方へ抜き出すときにプリフオームが射出コア
に付着して保持型から抜け出すのを阻止すること
ができる。また突起は吹込成形によつて消滅する
ので、成形されたカツプ状容器の外観が損われる
こともなく、保持型も割り金型により作る必要が
ないので構造が簡素化され、挾持のためのアンダ
ーカツト部分も不要となるなどの利点を有する。(Effect of the invention) As mentioned above, this invention is made by forming fine protrusions on the preform by being locked onto the holding mold, thereby preventing the preform from coming off the holding mold. When the injection core is pulled out upward, the preform can be prevented from adhering to the injection core and coming off from the holding mold. In addition, since the protrusions disappear during blow molding, the appearance of the molded cup-shaped container is not impaired, and there is no need to make a holding mold with a split mold, so the structure is simplified, and the underside for clamping is not damaged. This has the advantage that a cut portion is not required.
図面はこの考案に係るカツプ状容器のプリフオ
ームを例示するもので、第１図は縦断図、第２図
は射出成形時の縦断面図、第３図はカツプ状容器
成形時の縦断面図である。
１……プリフオーム、２……開口縁、３……突
起、４……保持型、６……射出コア。
The drawings illustrate the preform of the cup-shaped container according to this invention. Figure 1 is a longitudinal sectional view, Figure 2 is a longitudinal sectional view during injection molding, and Figure 3 is a longitudinal sectional view during molding of the cup-shaped container. be. 1... Preform, 2... Opening edge, 3... Protrusion, 4... Holding mold, 6... Injection core.
Claims (1)
外方へ突出したカツプ状容器のプリフオームであ
つて、上記開口縁の下側面にプリフオームの保持
型と係合する微細な突起を形成してなるカツプ状
容器のプリフオーム。 A preform of a cup-shaped container having an opening area larger than the bottom area and an opening edge protruding outward, the lower surface of the opening edge being formed with minute protrusions that engage with the holding mold of the preform. Preform of cup-shaped container.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9046385U JPH0420012Y2 (en) | 1985-06-15 | 1985-06-15 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9046385U JPH0420012Y2 (en) | 1985-06-15 | 1985-06-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61206417U JPS61206417U (en) | 1986-12-26 |
| JPH0420012Y2 true JPH0420012Y2 (en) | 1992-05-07 |
Family
ID=30645478
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9046385U Expired JPH0420012Y2 (en) | 1985-06-15 | 1985-06-15 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0420012Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003170487A (en) * | 2001-09-25 | 2003-06-17 | Frontier:Kk | Preform for cup-shaped container |
| JP2021194899A (en) * | 2020-06-18 | 2021-12-27 | 株式会社青木固研究所 | Injection molding mold, preform molding method, and method for producing hollow article |
-
1985
- 1985-06-15 JP JP9046385U patent/JPH0420012Y2/ja not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003170487A (en) * | 2001-09-25 | 2003-06-17 | Frontier:Kk | Preform for cup-shaped container |
| JP2021194899A (en) * | 2020-06-18 | 2021-12-27 | 株式会社青木固研究所 | Injection molding mold, preform molding method, and method for producing hollow article |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61206417U (en) | 1986-12-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP0785146B1 (en) | Process of injection orientation blow moulding of plastic bottles | |
| US4732557A (en) | Stretching blow molding apparatus for cup-like containers | |
| GB2041286A (en) | Synthetic resin bottle with a handle | |
| GB2061800A (en) | Method of and apparatus for manufacturing synthetic resin bottles with base cups | |
| JPH02129040U (en) | ||
| US6047851A (en) | Injection blow molded container and related method | |
| JPH0365246B2 (en) | ||
| GB2278802A (en) | Injection and blow-moulding a bottle | |
| JP4429399B2 (en) | Plastic cap | |
| JPS60204630A (en) | Formation of hollow molded articles | |
| JPH0414187Y2 (en) | ||
| JPS6030168Y2 (en) | Polyethylene terephthalate resin bottle | |
| JP2534174Y2 (en) | Low pressure mold | |
| DK220390D0 (en) | CONTAINERS WITH REMOVAL CLOSES | |
| JPS6311218B2 (en) | ||
| JPS5881124A (en) | Method of fitting base cup onto biaxially stretched bottle bottom | |
| JPS61206417U (en) | ||
| JPS5812747Y2 (en) | elastic stopper | |
| JPS6335513B2 (en) | ||
| JPH0719783Y2 (en) | Plastic container | |
| JPS6343060Y2 (en) | ||
| JPS5840013Y2 (en) | Preforms for hollow containers | |
| JPS6142815Y2 (en) | ||
| IL105837A (en) | Bottle | |
| JPS6475220A (en) | Manufacture of mouth part of vessel and device to be used therefor |