JPH057177B2 - - Google Patents
Info
- Publication number
- JPH057177B2 JPH057177B2 JP19015387A JP19015387A JPH057177B2 JP H057177 B2 JPH057177 B2 JP H057177B2 JP 19015387 A JP19015387 A JP 19015387A JP 19015387 A JP19015387 A JP 19015387A JP H057177 B2 JPH057177 B2 JP H057177B2
- Authority
- JP
- Japan
- Prior art keywords
- mold
- molded product
- blow molding
- protrusion
- 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 - Lifetime
Links
- 238000000071 blow moulding Methods 0.000 claims description 24
- 238000000465 moulding Methods 0.000 description 6
- 229920001169 thermoplastic Polymers 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
Description
【発明の詳細な説明】
産業上の利用分野
本発明は、ブロー成形において分割形式の金型
から成形品を取出す際に支障となる金型の開閉方
向と直交する方向に凹設されたアンダーカツトと
なる凹部を有する成形品のブロー成形用金型に関
する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an undercut recessed in a direction perpendicular to the opening/closing direction of the mold, which is an obstacle when taking out a molded product from a split mold in blow molding. This invention relates to a mold for blow molding a molded product having a concave portion.
従来の技術
従来、ブロー成形において分割形式の金型から
取出す際に支障となるアンダーカツトである凹部
を有するブロー成形品を成形するブロー成形用金
型は以下のようなものが公知である。BACKGROUND ART Conventionally, the following blow molding molds are known for molding a blow molded product having a concave portion, which is an undercut, which becomes an obstacle when the product is taken out from a split mold in blow molding.
(A) 第６図に示すように成形品上アンダーカツト
である凹部を成形する突出部６２を金型６３に
構成し、分割形式の金型６３，６４をＸ方向に
開いて成形品６１を取出す際に無理に金型より
成形品を抜くことができるようにする。(A) As shown in FIG. 6, a mold 63 is provided with a protrusion 62 that forms a recess that is an undercut on the molded product, and the molded product 61 is formed by opening the split molds 63 and 64 in the X direction. To make it possible to forcefully pull out a molded product from a mold when taking it out.
(B) 第７図に示すように、成形品上アンダーカツ
トとなる凹部を成形する突出部７２を金型本体
７３とは別個に構成し、ブロー成形後、金型７
３，７４をＸ方向に開いて成形品７１を金型７
３から離型する以前に、油圧シリンダ７４にて
上記金型７３の突出部７２を金型本体の開閉方
向と直交する方向Ｙへ直線的に移動し成形品７
１を取出す。(B) As shown in FIG. 7, a protrusion 72 that forms a recess that will become an undercut on the molded product is configured separately from the mold body 73, and after blow molding, the mold 7
3 and 74 in the X direction and place the molded product 71 into the mold 7.
3, the protruding portion 72 of the mold 73 is moved linearly in the direction Y perpendicular to the opening/closing direction of the mold body using a hydraulic cylinder 74 to release the molded product 7.
Take out 1.
発明が解決しようとする問題点
上記従来技術(A)にあつては、分割形式の金型を
開いて成形品を取出す際に無理に金型より抜ける
程度の凹部の深さ及び凹部の形状に限定され、成
形品の形状に制約がともなうものであつた。ま
た、成形品を取出す際に成形品の凹部と隣接する
部分を傷つけ、成形品の商品価値を低下させる問
題があつた。Problems to be Solved by the Invention In the above prior art (A), the depth and shape of the recess are such that when the split-type mold is opened and the molded product is removed, the recess is forced to come out of the mold. However, the shape of the molded product was restricted. Furthermore, when taking out the molded product, there is a problem in that the part of the molded product adjacent to the recess is damaged, reducing the commercial value of the molded product.
また、従来技術(B)にあつては、成形品上アンダ
ーカツトとなる凹部を成形する金型の突出部を金
型本体の開閉方向と直交する方向へ直線的に移動
するように構成されているため、突出部を移動さ
せるための油圧シリンダ等の調整不良により、突
出部の金型本体内に後退する距離が少しでも不足
した場合、成形品が離型できなくなつたり、成形
品の凹部と隣接する部分を傷つけるおそれがあつ
た。 Furthermore, in conventional technology (B), the protrusion of the mold that forms the recess that forms the undercut on the molded product is configured to move linearly in a direction perpendicular to the opening and closing direction of the mold body. Therefore, if the distance that the protruding part retreats into the mold body is insufficient due to improper adjustment of the hydraulic cylinder, etc. used to move the protruding part, the molded product may not be able to be released from the mold or the recessed part of the molded product may There was a risk of damaging adjacent parts.
本発明は上記の欠点を解消するものであり、金
型構造を複雑とすることなく、従来アンダーカツ
トとなり成形上形状に制約のあつた凹部を容易に
成形でき、且つ金型から取出す際に成形品が傷つ
けられることのないブロー成形用金型を提供する
ことを目的とする。 The present invention solves the above-mentioned drawbacks, and allows easy molding of concave portions, which conventionally result in undercuts that restrict the shape of molding, without complicating the mold structure. To provide a blow molding mold that does not damage products.
問題点を解決するための手段
本発明は、その目的を達成するための技術的手
段を次の通り構成した。すなわち、金型本体の開
閉方向と直交する方向に凹設された凹部を有する
成形品のブロー成形用金型であつて、成形品の凹
部を成形する金型突出部を金型本体とは別個に構
成し、上記金型突出部は金型本体の開閉方向に回
動自在に設けられ、成形品を金型本体から離型す
る際、金型突出部が成形品の離型する方向へ回動
して金型本体に埋没するよう構成したことを特徴
とするブロー成形用金型に関する。Means for Solving the Problems The present invention has the following technical means for achieving the object. In other words, it is a blow molding mold for a molded product having a concave portion formed in a direction perpendicular to the opening/closing direction of the mold body, and the mold protrusion for forming the concave portion of the molded product is separate from the mold body. The mold protrusion is rotatable in the opening and closing direction of the mold body, and when the molded product is released from the mold body, the mold protrusion rotates in the direction in which the molded product is released. The present invention relates to a blow molding mold characterized in that it is configured to move and be buried in a mold body.
作 用
本発明のブロー成形用金型は、成形品を金型本
体から離型する際、金型突出部が離型する方向へ
回動して金型本体に埋没するよう構成したので、
金型突出部の金型本体内への後退する距離が不足
した場合であつても、成形品の離型方向と金型突
出部の移動方向とが同一であるので、金型突出部
は容易に回動して成形品を離型することができ、
金型によつて成形品に無理が生ずることがないの
で成形品に傷がつかない。Function The blow molding mold of the present invention is configured such that when releasing the molded product from the mold body, the mold protrusion rotates in the direction of mold release and is buried in the mold body.
Even if the distance for the mold protrusion to retreat into the mold body is insufficient, the mold protrusion can be easily removed because the direction of releasing the molded product and the moving direction of the mold protrusion are the same. The molded product can be released by rotating the
Since the mold does not cause strain on the molded product, the molded product is not damaged.
実施例
以下本発明の一実施例を図面にもとづき説明す
る。Embodiment An embodiment of the present invention will be described below based on the drawings.
(1) 成形品
第１図は、本発明に係るブロー成形用金型にに
て製造された成形品の一例である容器を示す。(1) Molded product FIG. 1 shows a container that is an example of a molded product manufactured using the blow molding die according to the present invention.
容器１は熱可塑性プラスチツクの中空２重壁構
造からなり、内部には物品の収納リセス２を有す
る。また、容器の開口部内周縁３にはブロー成形
上アンダーカツトである凹部４が形成されてお
り、上記凹部４に板状カバー５の突出縁６が係合
するよう構成されている。 The container 1 has a hollow double-walled structure made of thermoplastic plastic, and has a recess 2 for storing articles therein. Further, a recess 4 which is an undercut on the blow molding is formed in the inner circumferential edge 3 of the opening of the container, and the projecting edge 6 of the plate-like cover 5 is configured to engage with the recess 4.
(2) ブロー成形用金型
第２図から第５図は、上記した容器１を製造す
るためのブロー成形用金型を示す。(2) Blow molding mold FIGS. 2 to 5 show a blow molding mold for manufacturing the container 1 described above.
ブロー成形用金型は一対の金型本体７，８を互
いの合せ面PLにて合致させる分割形式となつて
おり、一方の金型本体７には凸形キヤビテイ９
が、また他方の金型８には凹形キヤビテイ１０が
形成されている。 The blow molding mold has a split type in which a pair of mold bodies 7 and 8 are matched at their mating surfaces PL, and one mold body 7 has a convex cavity 9.
However, a concave cavity 10 is formed in the other mold 8.
１１は容器１のアンダーカツトである凹部４を
成形する金型突出部であり、上記金型突出部１１
は金型本体７とは別個に構成され、かつ金型の開
閉方向Ｘに回動自在に設けられている。１２は金
型突出部１１の回転軸であり、１３は円弧状の突
出キヤビテイ、１４は金型突出部１１を常に外方
に突出するように付勢するためのバネ等の弾性部
材である。そして、成形品である容器１を金型本
体７から離型する際、金型突出部１１が成形品の
離型方向X1へ回動して金型本体７に埋没するよ
う構成されている。 11 is a mold protrusion for molding the recess 4 which is the undercut of the container 1;
is constructed separately from the mold body 7 and is rotatably provided in the opening/closing direction X of the mold. 12 is a rotating shaft of the mold protrusion 11, 13 is an arc-shaped protrusion cavity, and 14 is an elastic member such as a spring for always urging the mold protrusion 11 to protrude outward. When the container 1, which is a molded product, is released from the mold body 7, the mold protrusion 11 is configured to rotate in the mold release direction X 1 and be buried in the mold body 7. .
なお、弾性部材１４の代替として公知の油圧シ
リンダを用いることもできる。 Note that a known hydraulic cylinder may be used instead of the elastic member 14.
(3) ブロー成形方法
第２図から第４図に従つて本発明に係るブロー
成形用金型を使用して容器１をブロー成形する方
法を説明する。(3) Blow molding method A method of blow molding the container 1 using the blow molding mold according to the present invention will be explained with reference to FIGS. 2 to 4.
押出機（図示せず）にて可塑化溶融されたポリ
エチレンなどの熱可塑性プラスチツクを筒状のパ
リスンＰとして押出ヘツド１５より押出し、第２
図のように分割形式の金型本体７，８間に配置す
る。そして、第３図に示すように、金型本体７，
８を閉鎖し、パリスンＰ内に空気等の圧力流体を
吹込むことにより、パリスンＰを凸形キヤビテイ
９、金型突出部１１の円弧状の突出キヤビテイ１
３及び凹形キヤビテイ１０に沿つた形状に膨脹し
て容器１を成形する。ついで、第４図に示すよう
に、金型本体７，８を開き、パリスンＰから成形
された容器１を金型本体７から離型する際、金型
突出部１１は容器１のアンダーカツトである凹部
４の壁面４ａに押され、金型本体７に埋没するよ
う回動する。また金型より容器１を取り出した後
は、周囲のバリP1を除去して第１図に示すよう
な容器１が得られる。 A thermoplastic plastic such as polyethylene, which has been plasticized and melted in an extruder (not shown), is extruded from the extrusion head 15 as a cylindrical parison P.
It is placed between the split mold bodies 7 and 8 as shown in the figure. Then, as shown in FIG. 3, the mold body 7,
8 and blowing pressure fluid such as air into the parison P, the parison P is formed into a convex cavity 9 and an arcuate protruding cavity 1 of the mold protrusion 11.
3 and the concave cavity 10 to form the container 1. Next, as shown in FIG. 4, when the mold bodies 7 and 8 are opened and the container 1 formed from the parison P is released from the mold body 7, the mold protrusion 11 is inserted into the undercut of the container 1. It is pushed by the wall surface 4a of a certain recess 4 and rotates so as to be buried in the mold body 7. Further, after the container 1 is taken out from the mold, the surrounding burr P1 is removed to obtain the container 1 as shown in FIG.
発明の効果
本発明に係るブロー成形用金型は金型構造を複
雑とすることなく、従来アンダーカツトとなり成
形上、形状に制約のあつた凹部を容易に成形で
き、且つ金型から取出す際に成形品が金型によつ
て傷つけられることもない。よつてコンテナ、ケ
ース、ハウジング、パネル部材など中空２重壁成
形品の内側または外側部分に凹設された凹部を有
する場合のブロー成形用金型として有用である。Effects of the Invention The blow molding mold according to the present invention can easily form a concave part, which would conventionally be an undercut and have restrictions on shape during molding, without complicating the mold structure. The molded product will not be damaged by the mold. Therefore, it is useful as a mold for blow molding when a hollow double wall molded product, such as a container, case, housing, or panel member, has a recess formed in the inner or outer part thereof.
第１図は本発明に係るブロー成形用金型にて得
られた成形品の一例である容器の全体斜視図、第
２図は本発明に係るブロー成形用金型の正面図、
第３図は金型を閉じた状態の金型の部分断面図、
第４図は成形後金型を開く状態の金型要部断面
図、第５図は一方の金型本体７の部分斜視図、第
６図及び第７図は従来のブロー成形金型を示す第
３図と同様の金型部分断面図である。
１……容器、４……凹部、７，８……本体金
型、１１……金型突出部、Ｐ……パリスン。
FIG. 1 is an overall perspective view of a container which is an example of a molded product obtained with the blow molding mold according to the present invention, and FIG. 2 is a front view of the blow molding mold according to the present invention.
Figure 3 is a partial cross-sectional view of the mold in a closed state;
FIG. 4 is a sectional view of the main part of the mold in a state where the mold is opened after molding, FIG. 5 is a partial perspective view of one mold body 7, and FIGS. 6 and 7 show a conventional blow molding mold. FIG. 4 is a partial cross-sectional view of the mold similar to FIG. 3; DESCRIPTION OF SYMBOLS 1... Container, 4... Recessed part, 7, 8... Main mold, 11... Mold protrusion, P... Parison.
Claims (1)
れた凹部を有する成形品のブロー成形用金型であ
つて、成形品の凹部を成形する金型突出部を金型
本体とは別個に構成し、上記金型突出部は金型本
体の開閉方向に回動自在に設けられ、成形品を金
型本体から離型する際、金型突出部が成形品の離
型する方向へ回動して金型本体に埋没するよう構
成したことを特徴とするブロー成形用金型。1. A mold for blow molding a molded product having a recess formed in a direction perpendicular to the opening/closing direction of the mold body, in which the mold protrusion forming the recess of the molded product is separate from the mold body. The mold protrusion is rotatable in the opening/closing direction of the mold body, and when the molded product is released from the mold body, the mold protrusion rotates in the direction in which the molded product is released. A mold for blow molding, characterized in that the mold is configured to be embedded in the mold body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19015387A JPS6434721A (en) | 1987-07-31 | 1987-07-31 | Mold for blow molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19015387A JPS6434721A (en) | 1987-07-31 | 1987-07-31 | Mold for blow molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6434721A JPS6434721A (en) | 1989-02-06 |
| JPH057177B2 true JPH057177B2 (en) | 1993-01-28 |
Family
ID=16253299
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19015387A Granted JPS6434721A (en) | 1987-07-31 | 1987-07-31 | Mold for blow molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6434721A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0668572U (en) * | 1993-03-15 | 1994-09-27 | 英夫 森 | Stick with sugar |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7393495B2 (en) * | 2003-11-25 | 2008-07-01 | Custom-Pak Inc. | Methods and apparatuses for the formation of blow molded objects |
| US7905305B2 (en) | 2006-07-07 | 2011-03-15 | Mattel, Inc. | Blow-molded wheels having undulating treads, methods for producing the same, and children's ride-on vehicles including the same |
| US7621543B2 (en) | 2006-08-23 | 2009-11-24 | Mattel, Inc. | Blow-molded wheels having undercut treads, methods for producing the same, and children's ride-on vehicles including the same |
| KR100775744B1 (en) * | 2007-02-07 | 2007-11-09 | 김성수 | Foldable safety fence with a replaceable safety indicator having easy connecting structure |
-
1987
- 1987-07-31 JP JP19015387A patent/JPS6434721A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0668572U (en) * | 1993-03-15 | 1994-09-27 | 英夫 森 | Stick with sugar |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6434721A (en) | 1989-02-06 |
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