JPS598332B2 - Molding method for thermoplastic resin hollow bodies - Google Patents
Molding method for thermoplastic resin hollow bodiesInfo
- Publication number
- JPS598332B2 JPS598332B2 JP14810678A JP14810678A JPS598332B2 JP S598332 B2 JPS598332 B2 JP S598332B2 JP 14810678 A JP14810678 A JP 14810678A JP 14810678 A JP14810678 A JP 14810678A JP S598332 B2 JPS598332 B2 JP S598332B2
- Authority
- JP
- Japan
- Prior art keywords
- sheets
- thermoplastic resin
- molding
- hollow bodies
- resin hollow
- 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
Landscapes
- 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】
本発明は少なくとも一部に中空部を有する熱可塑性樹脂
中空体の成形法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for molding a thermoplastic resin hollow body having at least a portion of a hollow portion.
従来、外面に凹凸形状を有する熱可塑性樹脂中空体を成
形する場合、第１図に示すように、予め所定の形状に成
形した素材１、丁を接着若しくは融着することによつて
中空部２を形成する方法やブロー成形による方法が用い
られるが、後者は成形精度が悪いので前者が一般的であ
る。Conventionally, when molding a thermoplastic resin hollow body having an uneven shape on its outer surface, as shown in FIG. A method of forming a mold or a method of blow molding are used, but since the latter has poor molding accuracy, the former is generally used.
しかし、前者の方法においても、ポリエチレンやポリプ
ロピレンなどの材料を使用するときは成形後の熱収縮が
大きくそれぞれの成形物間で寸法誤差を生じ、第１図の
ように素材１、１’を合せるときに両者の凹凸が一致し
ない欠点があつた。特に大型の成形品の場合には前記の
誤差が大きく、例えば排水処理装置において多量の微生
物を付着せしめるために使用される回転円板の製作に当
つては一体成形した円板素材を貼わ合せることは誤差が
大きくて不可能で、複数に分割したものによつて組立て
なければならなかつた。本発明は、素材の成形とその貼
わ合せを別に行なうのではなく、同時に行なうことによ
つて上記の問題点を解決したものである。However, even in the former method, when materials such as polyethylene or polypropylene are used, the heat shrinkage after molding is large and dimensional errors occur between each molded product, so materials 1 and 1' are combined as shown in Figure 1. Sometimes, there was a drawback that the unevenness of the two did not match. The above-mentioned error is especially large in the case of large molded products. For example, when manufacturing a rotating disk used to attach a large amount of microorganisms in a wastewater treatment device, integrally molded disk materials are pasted together. This was impossible due to the large margin of error, and it had to be assembled from multiple parts. The present invention solves the above-mentioned problems by not performing the molding of the materials and the bonding of the materials separately, but at the same time.
以下図面によつて本発明を説明する。The present invention will be explained below with reference to the drawings.
第２図に示すように本発明は、重ね合せた２枚の熱可塑
性樹脂シート３、ぎを使用する。As shown in FIG. 2, the present invention uses two superimposed thermoplastic resin sheets 3.
シート３、ｇは所定の凹凸を有する金型４に挾んで真空
成形するのであるが、シート３、３の少なくとも一方を
外側に突出させることによつて中空部が形成され、他の
部分は熱溶着することによつてシート３、３’は一体と
なる。金型４には、シート３、ぎを突出させ中空部を形
成せしめる部分にシートを真空成形可能な程度に軟化さ
せる加熱装置５を内蔵し、シート３、３を一体化せしめ
る部分にはシート３、３’奪溶融させる加熱装置６を内
蔵している。成形を行なうときは、まず金型４に重ね合
せたシート３、３’を挾み、加熱装置５、６によつて所
定部分を軟化、溶融させる。The sheets 3 and g are vacuum-formed by being sandwiched between a mold 4 having predetermined irregularities, and a hollow portion is formed by making at least one of the sheets 3 and 3 protrude outward, and the other portion is heated. By welding, the sheets 3 and 3' become integral. The mold 4 has a built-in heating device 5 for softening the sheet to the extent that vacuum molding is possible in the part where the sheet 3 and the gills are projected to form a hollow part, and the sheet 3 is installed in the part where the sheets 3 and 3 are to be integrated. , 3' has a built-in heating device 6 for melting. When molding is performed, the sheets 3, 3' stacked in the mold 4 are first sandwiched, and predetermined portions are softened and melted by the heating devices 5, 6.
金型４を合せ吸引することにより加熱装置５に面する部
分に中空部７が形成される。このとき、中空部Ｔに空気
を注入することにより成形が容易に行なえる。一方、加
熱装置６に面する部分は加圧状態で熱溶着されシート３
、３’は一体となる。By aligning the molds 4 and suctioning them, a hollow portion 7 is formed in the portion facing the heating device 5. At this time, molding can be easily performed by injecting air into the hollow part T. On the other hand, the portion facing the heating device 6 is thermally welded under pressure to the sheet 3.
, 3' become one.
ポリエチレン樹脂シートの場合、加熱装置５によつて１
００〜２３０℃に、加熱装置６によつて１４０〜２３０
℃に加熱すれば成形可能である。上述のように本発明は
、重ね合せた２枚の熱可塑性樹脂シートの熱溶着と中空
部の成形を同時に行なうので、従来の貼り合せにおける
成形誤差は問題とならず、大型品も一体成形できる点極
めて工業的価値の大なるものである。In the case of a polyethylene resin sheet, the heating device 5
00~230℃, 140~230℃ by heating device 6
It can be molded by heating to ℃. As mentioned above, in the present invention, the heat welding of two stacked thermoplastic resin sheets and the molding of the hollow part are performed simultaneously, so the molding errors in conventional lamination are not a problem, and large products can also be integrally molded. It is of extremely great industrial value.
第１図は従来の成形法の断面説明図、第２図は本発明の
断面説明図である。
３，３′は熱可塑性樹脂シート、４は金型、５，６は加
熱装置、７は中空部。FIG. 1 is a cross-sectional explanatory diagram of a conventional molding method, and FIG. 2 is a cross-sectional explanatory diagram of the present invention. 3 and 3' are thermoplastic resin sheets, 4 is a mold, 5 and 6 are heating devices, and 7 is a hollow portion.
Claims (1)
その一方を外側へ突出させるように真空成形するに際し
、前記シートを突出せしめる部分にはシートを真空成形
可能な程度に軟化させる加熱装置を内蔵し２枚のシート
を密着させたままの部分にはシートを溶融させる加熱装
置を内蔵した金型を使用し、２枚のシートを密着させた
ままの部分を金型で加圧しながら真空成形することを特
徴とする熱可塑性樹脂中空体の成形法。1. When vacuum forming two stacked thermoplastic resin sheets so that at least one of them protrudes outward, a heating device is built in the part where the sheets are made to protrude to soften the sheets to the extent that they can be vacuum formed. A mold with a built-in heating device that melts the sheets is used for the part where the two sheets are kept in close contact with each other, and the part where the two sheets are kept in close contact with each other is vacuum-formed while being pressurized by the mold. A method for molding thermoplastic resin hollow bodies characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14810678A JPS598332B2 (en) | 1978-11-30 | 1978-11-30 | Molding method for thermoplastic resin hollow bodies |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14810678A JPS598332B2 (en) | 1978-11-30 | 1978-11-30 | Molding method for thermoplastic resin hollow bodies |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5574827A JPS5574827A (en) | 1980-06-05 |
| JPS598332B2 true JPS598332B2 (en) | 1984-02-24 |
Family
ID=15445372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14810678A Expired JPS598332B2 (en) | 1978-11-30 | 1978-11-30 | Molding method for thermoplastic resin hollow bodies |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS598332B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024051879A1 (en) * | 2022-09-09 | 2024-03-14 | Schaeffler Technologies AG & Co. KG | Bipolar plate production method, bipolar plate and electrochemical cell |
-
1978
- 1978-11-30 JP JP14810678A patent/JPS598332B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5574827A (en) | 1980-06-05 |
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