JPS62297133A - Manufacture of odd-shaped hollow body - Google Patents
Manufacture of odd-shaped hollow bodyInfo
- Publication number
- JPS62297133A JPS62297133A JP14175786A JP14175786A JPS62297133A JP S62297133 A JPS62297133 A JP S62297133A JP 14175786 A JP14175786 A JP 14175786A JP 14175786 A JP14175786 A JP 14175786A JP S62297133 A JPS62297133 A JP S62297133A
- Authority
- JP
- Japan
- Prior art keywords
- split mold
- parison
- split
- cavity
- mold
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 3
- 239000012530 fluid Substances 0.000 claims abstract description 8
- 238000000034 method Methods 0.000 claims abstract description 6
- 238000003780 insertion Methods 0.000 claims 1
- 230000037431 insertion Effects 0.000 claims 1
- 238000000071 blow moulding Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】 ３、発明の詳細な説明 〔発明の目的〕 （産業上の利用分野） 本発明は、曲管等の異形中空体の製造方法に関する。[Detailed description of the invention] 3. Detailed description of the invention [Purpose of the invention] (Industrial application field) The present invention relates to a method for manufacturing irregularly shaped hollow bodies such as curved pipes.
（従来の技術）
従来、曲管等の異形中空体の１！！造方払としては、た
とえば、特公昭５８−４７３３７号公報に示されるよう
に、３分割形の一対の割型を用い、υ１１重部のキャビ
ティの上端間［１からパリソンを降下挿入するとともに
、キャビティの下端開口から吸引製品により吸引してパ
リソンを挿通さゼ、ついで割型上部および割型下部を型
閉し、パリソン内に加圧流体を圧入して成形するものが
知られている。(Prior art) Conventionally, 1! of irregularly shaped hollow bodies such as curved pipes! ! For example, as shown in Japanese Patent Publication No. 58-47337, a pair of three-part split molds is used, and a parison is lowered and inserted from [1] between the upper ends of the cavity of the υ11-layered part. It is known that a parison is inserted through the parison by suction from the opening at the lower end of the cavity using a suction product, then the upper and lower parts of the split mold are closed, and a pressurized fluid is pressurized into the parison to form the mold.
（発明が解決しようとする問題点） 。(Problem that the invention seeks to solve).
しかし、上記の方法では、製品の曲率半径の小さい屈曲
部、すなわち、中心軸が大きく屈曲する急激な屈曲部を
成形することは不可部もしくはきわめて困難であった。However, with the above method, it is impossible or extremely difficult to form a bent part of the product with a small radius of curvature, that is, a sharply bent part where the central axis is largely bent.
また、この方法では、割型主部の下端開口から突出した
パリソンを割型下部で喰い切って閉鎖するのみであるた
め、割型主部によって成形される製品部分と割型下部に
よって成形される製品部分との接続個所において屈曲部
を形成することができない。In addition, in this method, the parison protruding from the lower end opening of the split mold main part is only cut off and closed by the split mold lower part, so that the product part formed by the split mold main part and the split mold lower part are It is not possible to form a bend at the connection point with the product part.
本発明は、上述のような問題点に着目してなされたちの
でＩｉ′４形中空体中空体なし成形に際して、屈曲の曲
率半径の小さい屈曲部をも容易に成形でき、また、割型
主部と割型下部との接続個所において、製品の屈曲部を
成形できるようにすることを目的とするものである。The present invention has been made with attention to the above-mentioned problems, and therefore, when molding a type Ii'4 hollow body without a hollow body, it is possible to easily mold a bent part with a small radius of curvature, and also to form a split mold main part. The purpose of this is to make it possible to form a bent part of the product at the connection point between the mold and the lower part of the split mold.
（問題点を解決するための手段）
本発明は、割型主部５とこの割型主部５の上下部の割型
上部８および割型下部１０とからなる一対の割型１を用
い、この一対の割型１の割型主部５のキャビティ４内に
パリソン１３を挿通した後、上記割型上部８を型閉する
とともに、上記割型下部１０の型閉によって上記割型主
部５の下端から突出したパリソン１３を強制的に屈曲さ
せ、上記パリソン１３内に加圧流体を圧入するものであ
る。(Means for solving the problem) The present invention uses a pair of split molds 1 consisting of a split mold main part 5, and a split mold upper part 8 and a split mold lower part 10 at the upper and lower parts of this split mold main part 5, After inserting the parison 13 into the cavity 4 of the split mold main part 5 of the pair of split molds 1, the split mold upper part 8 is closed, and the split mold main part 5 is closed by closing the split mold lower part 10. The parison 13 protruding from the lower end of the parison 13 is forcibly bent to force pressurized fluid into the parison 13.
（作用）
本発明は、製品の曲率半径の小さい屈曲部を割型主部５
と割型下部１０との接続部に対応するように設定し、割
型主部５のキャビティ４内にパリソン１３を挿通し、割
型主部５の下端開口から突出したパリソン１３を割型下
部１０の型閉によって強制的に屈曲させた後、パリソン
１３内に加圧流体を圧入し、ブロー成形するものである
。(Function) The present invention allows the bending part of the product with a small radius of curvature to be
The parison 13 is inserted into the cavity 4 of the split mold main part 5, and the parison 13 protruding from the lower end opening of the split mold main part 5 is set to correspond to the connection part between the split mold main part 5 and the split mold lower part 10. After the parison 10 is forcibly bent by closing the mold, pressurized fluid is injected into the parison 13 and blow molding is performed.
（実施例） 以下、本発明の一実施例を図面を参照して説明する。(Example) Hereinafter, one embodiment of the present invention will be described with reference to the drawings.
１は金型を構成する一対の割型で、この一対の割型１は
、両側の型取付板２の対向面に複数個のガイドビン３が
突設され、このガイドビン３に、対向面にキャビティ４
を形成した割型主部５が移動自在に支持され、この割型
主部５は上記ガイドビン３に介装されたコイル状のスプ
リング６で互いに接近する方向に付勢されている。また
、上記両側の型取付板２に上記割型主部５の上下部にお
いて対向面にキャビティ７を形成した割型上部８および
対向面にキャビティ９を形成した割型下部１０が固着さ
れている。そして、上記割型主部５のキャビティ４と割
型上部８のキャビティ７との接続個所には屈曲部は形成
されていないが、割型１部５のキャビティ４と割型下部
１０のキャビティ９との接続個所には急激な屈曲部が形
成されている。Reference numeral 1 denotes a pair of split molds constituting a mold, and the pair of split molds 1 have a plurality of guide bins 3 protruding from opposing surfaces of mold mounting plates 2 on both sides. cavity 4
A split mold main part 5 having a shape formed therein is movably supported, and the split mold main parts 5 are urged in a direction toward each other by a coil-shaped spring 6 interposed in the guide bin 3. Furthermore, a split mold upper part 8 having a cavity 7 formed on the opposing surface and a split mold lower part 10 having a cavity 9 formed on the opposing surface are fixed to the mold mounting plates 2 on both sides at the upper and lower parts of the split mold main part 5. . Although no bent portion is formed at the connection point between the cavity 4 of the split mold main part 5 and the cavity 7 of the split mold upper part 8, the cavity 4 of the split mold 1 part 5 and the cavity 9 of the split mold lower part 10 are connected to each other. A sharp bend is formed at the connection point.
１１は上記一対の割型１間の上部に配設されたパリソン
押出ヘッドで、このパリソン押出ヘッド１１の下端中央
部に吹込ノズル１２が設けられている。Reference numeral 11 denotes a parison extrusion head disposed above the pair of split molds 1, and a blow nozzle 12 is provided at the center of the lower end of this parison extrusion head 11.
そうして、成形にあたっては、まず、第１図に示すよう
に、一対の割型１を互いに接近さぜ、割型主部５をその
対向面間に所定の間隙、たとえばパリソン径の１倍から
１７３倍程０寸法を残した位置まで互いにい近接させて
停止させる。この状態では、割型主部５はスプリング６
で押圧されて前進位置にあり、割型上部８および割型下
部１０は型閉位置から遥かに後退した位置にある。した
がって、割型主部５のキャピテイ４の上端開口は割型上
部８によって覆われていない状態にある。Then, in the molding process, first, as shown in FIG. Then, they are brought close to each other and stopped at a position that leaves about 173 times the 0 dimension. In this state, the split mold main part 5 is attached to the spring 6
The mold upper part 8 and the lower mold part 10 are in a position far retracted from the mold closing position. Therefore, the upper end opening of the cavity 4 of the split mold main part 5 is not covered by the split mold upper part 8.
次に、パリソン押出ヘッド１１から熱可塑性合成樹脂か
らなるパリソン１３を吐出して、割９３主部５のキャピ
テイ４の上０Ｆ１７１０からキャビティ４の内面に沿っ
て降下挿入させ、端末が割型下部１０で挟着可能な位置
まで垂下させる。この際、割型主部５は間隙を残した近
接位置にあり、パリソン１３の通路にゆとりがあるので
、屈曲の曲率半径が比較的小さい製品の場合でも迅速に
挿通することができる。Next, the parison 13 made of thermoplastic synthetic resin is discharged from the parison extrusion head 11, and is inserted downward from the top 0F1710 of the cavity 4 of the main part 5 of the split 93 along the inner surface of the cavity 4, so that the terminal ends at the bottom part of the split mold lower part 10. hang it down to a position where it can be clamped. At this time, the split mold main portions 5 are located close to each other with a gap left, and the path of the parison 13 is spacious, so that even products with a relatively small radius of curvature can be inserted quickly.
また、場合によっては、割型主部５を完全に型閉した状
態で、そのキャビティ４の上端開口からパリソン１３を
キャビティ４内に降下挿入させてもよく、この際、キャ
ビティ４内に対し下端間口から吸引作用を加えてもよい
。In some cases, the parison 13 may be lowered and inserted into the cavity 4 from the upper end opening of the cavity 4 with the split mold main part 5 completely closed. A suction effect may be applied from the frontage.
ついで、第２図に示すように、一対の割型１を型閉する
と、割型主部５の対向面がスプリング６の弾発力に抗し
て合着するとともに、割型上部８と割型下部１０の対向
面が合着し、パリソン１３は上下の喰切部を残してその
仝休がキャビティ４゜７．９内に収容された状態となる
。この際、割型主部５のキャビティ４と割型上部８のキ
ャビティ７との接続個所においては、パリソン１３は屈
曲せずに直線的に接続するが、割型主部５のキャビティ
４と割型下部１０のキャビティ９との接続個所において
はパリソン１３は強制的に屈曲されて、屈曲の曲率半径
の小さい、すなわち、急激な屈曲部が形成される。Next, as shown in FIG. 2, when the pair of split molds 1 are closed, the opposing surfaces of the split mold main portions 5 are joined together against the elastic force of the spring 6, and the split mold upper part 8 and the split mold main portions 5 are joined together. The opposing surfaces of the lower part 10 of the mold are brought together, and the parison 13 is housed in the cavity 4°7.9, leaving upper and lower cutouts. At this time, at the connection point between the cavity 4 of the split mold main part 5 and the cavity 7 of the split mold upper part 8, the parison 13 is connected linearly without being bent. At the point where the mold lower part 10 connects to the cavity 9, the parison 13 is forcibly bent to form a sharp bend with a small radius of curvature.
ついで、吹込ノズル１２からパリソン１３内に加圧流体
としてのエアを吹込んでブロー成形し、冷却後、型開き
して製品を取出させば、上下の喰切部以外にはばりの全
くない異形中空体が冑られる。Next, air as a pressurized fluid is blown into the parison 13 from the blowing nozzle 12 for blow molding, and after cooling, the mold is opened and the product is taken out, resulting in an irregularly shaped hollow body with no burrs except for the upper and lower cutouts. I'm disappointed.
本発明によれば、製品の曲率半径の小さい屈曲部を割型
主部と割型下部との接ＦＡ部に対応するように設定し、
割型主部のキャビティ内にパリソンを挿通し、割型主部
の下端開口から突出したパリソンを割型下部の型開によ
って強制的に屈曲させた後、パリソン内に加圧流体を圧
入し、ブロー成形するので、屈曲の曲率半径の小さい屈
曲部をも容易に成形でき、また、割型主部と割型下部と
の接続個所において、製品の屈曲部を成形することがで
きる。According to the present invention, the bent part of the product with a small radius of curvature is set to correspond to the contact FA part between the main part of the split mold and the lower part of the split mold,
Inserting the parison into the cavity of the split mold main part, forcibly bending the parison protruding from the lower end opening of the split mold main part by opening the lower part of the split mold, and then pressurizing fluid into the parison, Since blow molding is performed, it is possible to easily form a bent part with a small radius of curvature, and also to form a bent part of the product at the connection point between the main part of the split mold and the lower part of the split mold.
図は本発明の一実施例を示すもので、第１図は金型のパ
リソン垂下時の側面図、第２図は同上型閉時の側面図で
ある。
１・・割型、４・・キャビティ、５・・割型主部、８・
・割型上部、１０・・割型下部、１３・・パリソン。The drawings show an embodiment of the present invention; FIG. 1 is a side view of the mold when the parison is hanging down, and FIG. 2 is a side view of the mold when the mold is closed. 1. Split mold, 4. Cavity, 5. Split mold main part, 8.
- Upper part of the split mold, 10... Lower part of the split mold, 13... Parison.
Claims (1)
び割型下部とからなる一対の割型を用い、 この一対の割型の割型主部のキャビティ内にパリソンを
挿通した後、上記割型上部を型閉するとともに、上記割
型下部の型閉によって上記割型主部の下端から突出した
パリソンを強制的に屈曲させ、上記パリソン内に加圧流
体を圧入することを特徴とする異形中空体の製造方法。(1) Using a pair of split molds consisting of a split main part, an upper part of the split mold and a lower part of the split main part, place the parison in the cavity of the main part of the pair of split molds. After insertion, the upper part of the split mold is closed, and the parison protruding from the lower end of the main part of the split mold is forcibly bent by closing the lower part of the split mold, and pressurized fluid is forced into the parison. A method for manufacturing an irregularly shaped hollow body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61141757A JPH0645177B2 (en) | 1986-06-18 | 1986-06-18 | Method for manufacturing deformed hollow body and die apparatus thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61141757A JPH0645177B2 (en) | 1986-06-18 | 1986-06-18 | Method for manufacturing deformed hollow body and die apparatus thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62297133A true JPS62297133A (en) | 1987-12-24 |
| JPH0645177B2 JPH0645177B2 (en) | 1994-06-15 |
Family
ID=15299484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61141757A Expired - Lifetime JPH0645177B2 (en) | 1986-06-18 | 1986-06-18 | Method for manufacturing deformed hollow body and die apparatus thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0645177B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5662842A (en) * | 1994-07-18 | 1997-09-02 | Salflex Polymers Ltd. | Process for blow molding hollow objects with independent movement of mold halves |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6096433A (en) * | 1983-11-01 | 1985-05-30 | Ushigoro Sumitomo | Blow molding equipment of bent product |
-
1986
- 1986-06-18 JP JP61141757A patent/JPH0645177B2/en not_active Expired - Lifetime
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6096433A (en) * | 1983-11-01 | 1985-05-30 | Ushigoro Sumitomo | Blow molding equipment of bent product |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5662842A (en) * | 1994-07-18 | 1997-09-02 | Salflex Polymers Ltd. | Process for blow molding hollow objects with independent movement of mold halves |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0645177B2 (en) | 1994-06-15 |
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