JPS612526A - Method of blow molding - Google Patents
Method of blow moldingInfo
- Publication number
- JPS612526A JPS612526A JP12198284A JP12198284A JPS612526A JP S612526 A JPS612526 A JP S612526A JP 12198284 A JP12198284 A JP 12198284A JP 12198284 A JP12198284 A JP 12198284A JP S612526 A JPS612526 A JP S612526A
- Authority
- JP
- Japan
- Prior art keywords
- parison
- mold
- recesses
- cylindrical body
- movable pieces
- 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
- 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
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)
Abstract
Description
【発明の詳細な説明】
本発明は、二股エアーダクト等の筒状体を成形するため
のブロー成形方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a blow molding method for molding a cylindrical body such as a bifurcated air duct.
従来、筒状体を合成樹脂にて製造する場合、ブロー成形
方法が用いられている。しかし第５図に示すようなダク
ト１とこれより分岐する小径のダクト２とよりなる二股
エアーダクト等の特殊な形状の筒状体を合成樹脂にて成
形する場合、これを一度の加工にて行なわすにまずダク
ト１をブロー成形方法にて成形した後にその側面に小孔
をあけ、その部分に予め形成しておいた小径のダクト２
を接着剤による接着等の接合手段を用いて接合すること
によって形成していた。そのために各ダクトを成形する
工程、ダクト１に小孔をあける工程、ダクト２をダクト
１に接合する工程等多数の工程を必要とした。BACKGROUND ART Conventionally, when manufacturing a cylindrical body using synthetic resin, a blow molding method has been used. However, when molding a special-shaped cylindrical body from synthetic resin, such as a bifurcated air duct consisting of a duct 1 and a small-diameter duct 2 branching from it, as shown in Fig. 5, it is difficult to mold it in a single process. To do this, first, a duct 1 is molded using a blow molding method, and then a small hole is made in the side surface of the duct 1, and a small diameter duct 2 is formed in that part in advance.
It was formed by joining them using a joining means such as adhesive bonding. For this purpose, a large number of steps were required, including the step of molding each duct, the step of making small holes in the duct 1, and the step of joining the duct 2 to the duct 1.
又前記の二股エアーダクトをブロー成形工程の一度の工
程のみで行なうことも可能である。しかしこの方法の場
合ダクト１とダクト２を含む範囲に達する大きい径のパ
リソンを供給して成形しなければならない。そのために
パリソンを押出す押出し機が大型になり成形機全体も大
きくなる。また径の大きいパリソンを用いるために多量
の材料が必要となり、しかもダクト２を成形する部分は
材料のほとんどが金型にて挾まれるために成形品の片側
全体にわたって大きなパリを生しそのため材料の多くが
無駄になりまたパリを取除く作業か容易でない欠点を有
している。It is also possible to form the bifurcated air duct in only one step of the blow molding process. However, in this method, it is necessary to supply and mold a parison with a large diameter that covers the area including the ducts 1 and 2. Therefore, the extruder for extruding the parison becomes large, and the entire molding machine also becomes large. In addition, since a parison with a large diameter is used, a large amount of material is required, and most of the material in the part where the duct 2 is formed is held between the molds, resulting in a large parison over one side of the molded product. Much of it is wasted and also has the drawback that the task of removing the pari is not easy.
本発明は、金型本体に対して移動可能であって分岐用の
小径パイプを形成するための凹部を有する移動駒を有し
、まず移動駒を後退させた状態のまま金型を閉じパリソ
ンに低圧のエアーを供給することによってパリソンを膨
張させてその一部が移動駒の後退によって形成された全
便本体内の空間内に位置するようにしてから移動駒を移
動させて型締めを完了せしめ、その後成形のためのエア
ーを供給して分岐用のパイプを有する筒状体を形成する
ようにしたブロー成形方法を提供するものである。The present invention has a movable piece that is movable relative to the mold body and has a concave portion for forming a small diameter pipe for branching, and first closes the mold with the movable piece in a retracted state and attaches it to the parison. By supplying low-pressure air, the parison is inflated so that a part of it is located in the space within the entire stool body formed by the retraction of the moving piece, and then the moving piece is moved to complete the mold clamping, and then The present invention provides a blow molding method in which a cylindrical body having a branching pipe is formed by supplying air for molding.
以下図面にもとづいて本発明のブロー成形方法の詳細な
内容を説明する。第１図乃至第４図は本発明のブロー成
形方法にて用いる金型を示す図であって、これらのうち
第１図は斜視図、第２図は金型が開いている状態の横断
面図、第３図は金型か閉じた状態（移動駒は後退してい
る）の横断面図、第４図は移動駒を前進せしめて金型が
完全に細った状態の横断面図である。尚第１図は一方の
側のみ示しであるが実際には他の図と同様に反対側にも
金型本体か存在している。The details of the blow molding method of the present invention will be explained below based on the drawings. Figures 1 to 4 are views showing a mold used in the blow molding method of the present invention, of which Figure 1 is a perspective view and Figure 2 is a cross-sectional view of the mold when it is open. Figure 3 is a cross-sectional view of the mold in its closed state (the movable piece is retracted), and Figure 4 is a cross-sectional view of the mold in a state where the movable piece is moved forward and the mold is completely thin. . Although FIG. 1 only shows one side, there is actually a mold body on the opposite side as in the other figures.
これら図において、１１．１２は筒状体（第５図のダク
ト１）を形成するための凹部１１ａ、１２ａを有する金
型本体、１３．１４は筒状体の一部および小径のパイプ
（第５図のダクト２）を形成するための凹部１３ａ、１
３ｂ、１４ａ、１４ｂを有する移動駒で金型本体１１．
１２に対して第２図に矢印にて示す方向に移動可能であ
る。１５．１６は金型本体１１．１２を取付けるための
板である。In these figures, 11.12 is a mold body having recesses 11a and 12a for forming a cylindrical body (duct 1 in FIG. 5), 13.14 is a part of the cylindrical body and a small diameter pipe (the Recesses 13a, 1 for forming duct 2) in Figure 5
3b, 14a, 14b, the mold body 11.
12 in the direction indicated by the arrow in FIG. 15.16 is a plate for attaching the mold body 11.12.
次に以上のような構造の金型を用いての本発明の方法に
ついて述べる。Next, a method of the present invention using a mold having the above structure will be described.
まず第２図に示すように金型か開いている状態において
パリソン１０（鎖線にて示しである）を供給する。次に
型締めを行ない第３図に示すように両金型本体１１．１
２が互に接触した状態とする。この場合、移動駒１３：
１４は後退した状態にある。この第３図に示す金型の状
態にてパリノン１０に低圧のエアーを供給すれば、金型
本体１１．１２の凹部１１ａｒ１２ａ内に位置している
パリソン１０は膨張する。このパリソン１０の膨張ニヨ
って、移動駒１３．１４が後退していることによって形
成された空間Ａの部分にもパリソン１０の一部が膨れ出
る。この状態において後退している移動駒１３．１４を
前進せしめれば第４図に示すようになり金型の型締めが
完了する。この場合、パリソン１０は金型本体１１．１
２の凹部１１ａ。First, as shown in FIG. 2, the parison 10 (indicated by chain lines) is supplied with the mold in an open state. Next, the molds are clamped and both mold bodies 11.1 are closed as shown in Figure 3.
2 are in contact with each other. In this case, moving piece 13:
14 is in a retreated state. If low-pressure air is supplied to the parison 10 in the state of the mold shown in FIG. 3, the parison 10 located in the recess 11ar12a of the mold body 11.12 will expand. As the parison 10 expands, a portion of the parison 10 also bulges out in the space A formed by the moving pieces 13 and 14 retreating. In this state, if the movable pieces 13 and 14 which have been retracted are moved forward, the mold will be closed as shown in FIG. 4, and the mold clamping will be completed. In this case, the parison 10 is the mold body 11.1
2 recess 11a.
１２ａと移動駒１．３ 、１４の凹部１３ａ＋１４ａに
て形成されている空間内に存在すると共に、その一部は
移動駒１３．１４の凹部１３ｂ、１４ｂにて形成されて
いる空間内にも存在する。この状態にて成形のためにパ
リソン１θ内にエアーを吹き込めは筒状体が形成される
。しかも第１図より明らかなように移動駒１３の凹部１
３ａと凹部１３ｂとは下方の部分にて連通ずる形状とな
っているので、エアーの吹き込みによって金型本体１１
．１２の凹部１．１ａ、１２８と移動駒１３．１４の凹
部１３ａ１１４ａにて形成される筒状体と移動駒１３．
１４の凹部１３ｂ 、 １．４ｂに、て形成される小径
パイプとが一体となって形成される。したがって第５図
に示すような二股エアーダクトが形成される。12a and the recesses 13a+14a of the moving pieces 1.3 and 14, and a part of it also exists within the space formed by the recesses 13b and 14b of the moving pieces 13.14. do. In this state, air is blown into the parison 1θ for molding, and a cylindrical body is formed. Moreover, as is clear from FIG. 1, the recess 1 of the moving piece 13
3a and the recess 13b have a shape that communicates with each other at the lower part, so that the mold body 11 can be closed by blowing air.
．． The cylindrical body formed by the concave portions 1.1a and 128 of the movable piece 13.12 and the concave portion 13a114a of the movable piece 13.14 and the movable piece 13.14.
14 recesses 13b and 1.4b are integrally formed with small diameter pipes. Therefore, a bifurcated air duct as shown in FIG. 5 is formed.
成形後金型を開くことにより成形品を金型より取出すこ
とが出来る。この型開きの時ｊ・こ移動駒を金型本体の
後退よりも更に後退せしめることによって第２図に示す
状態に戻る。ここで再びパリソンを供給して再度前述の
操作を繰返すことにより再ひ第５図のような二股の筒状
体が形成される。The molded product can be taken out from the mold by opening the mold after molding. When the mold is opened, the state shown in FIG. 2 is returned by moving the moving piece further back than the mold body has retreated. By supplying the parison again and repeating the above-described operation, a bifurcated cylindrical body as shown in FIG. 5 is again formed.
以上説明したように本発明の成形方法によれば二股エア
ーダクト等の特殊形状の筒状体を一度の成形加工により
形成することが出来、接着等の他の加工工程を必要とし
ない。又移動駒を後退させたわずかな空間内にパリソン
を膨らませてその一部を位置せしめることによって分岐
したパイプ状部分を形成するようにしたので小さな径の
パリソンにてよく、そのため小型な成形機でよく、また
使用する材料が少なくてすむなどの効果を有する。As explained above, according to the molding method of the present invention, a special-shaped cylindrical body such as a bifurcated air duct can be formed by a single molding process, and other processing steps such as adhesion are not required. Also, by inflating the parison and positioning a part of it in a small space where the moving piece is retracted, a branched pipe-shaped part is formed, so a parison with a small diameter can be used, and therefore a small molding machine can be used. It also has the advantage of requiring less material.
第１図は本発明のブロー成形方法にて用いられる金型の
斜視図、第２図乃至第４図は前記金型の断面図で第２図
は金型が開いた状態、第３図は型締めの途中の状態、第
４図は型締めが完了した状態を夫々示す図、第５図は本
発明のブロー成形方法にて成形される製品の一例を示す
斜視図である。FIG. 1 is a perspective view of a mold used in the blow molding method of the present invention, FIGS. 2 to 4 are cross-sectional views of the mold, FIG. 2 is a state in which the mold is open, and FIG. FIG. 4 is a diagram showing a state in the middle of mold clamping, FIG. 4 is a diagram showing a state in which mold clamping is completed, and FIG. 5 is a perspective view showing an example of a product molded by the blow molding method of the present invention.
Claims (1)
能に配置され前記筒状体より分岐する部分を形成する凹
部を有する移動駒を有し、前記移動駒を後退させた状態
においてパリソンを供給しこれに低圧のエアーを供給し
てパリソンを膨張させてその一部が移動駒の後退によっ
て生じた空間内に位置するようにしてから移動駒を前進
させた上でエアーを供給して成形を行なうようにしたブ
ロー成形方法。A movable piece is disposed movably with respect to a mold body having a concave portion forming a cylindrical body, and has a concave portion forming a branching portion from the cylindrical body, and when the movable piece is retracted, the parison is moved. The parison is expanded by supplying low-pressure air so that a part of it is located in the space created by the retreat of the moving piece, and then the moving piece is moved forward and air is supplied to form the parison. A blow molding method that performs
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12198284A JPS612526A (en) | 1984-06-15 | 1984-06-15 | Method of blow molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12198284A JPS612526A (en) | 1984-06-15 | 1984-06-15 | Method of blow molding |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS612526A true JPS612526A (en) | 1986-01-08 |
Family
ID=14824641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12198284A Pending JPS612526A (en) | 1984-06-15 | 1984-06-15 | Method of blow molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS612526A (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5345365A (en) * | 1976-10-05 | 1978-04-24 | Kiyookura Kk | Method of producing hollow plastic article |
| JPS58185228A (en) * | 1982-04-26 | 1983-10-28 | Showa Denko Kk | Manufacture of blow molded product with protrusions |
| JPS59152822A (en) * | 1983-02-21 | 1984-08-31 | Kyoraku Co Ltd | Blow molded item with cylindrical anchoring section and manuacture thereof |
-
1984
- 1984-06-15 JP JP12198284A patent/JPS612526A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5345365A (en) * | 1976-10-05 | 1978-04-24 | Kiyookura Kk | Method of producing hollow plastic article |
| JPS58185228A (en) * | 1982-04-26 | 1983-10-28 | Showa Denko Kk | Manufacture of blow molded product with protrusions |
| JPS59152822A (en) * | 1983-02-21 | 1984-08-31 | Kyoraku Co Ltd | Blow molded item with cylindrical anchoring section and manuacture thereof |
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