JPS626971B2 - - Google Patents
Info
- Publication number
- JPS626971B2 JPS626971B2 JP54119715A JP11971579A JPS626971B2 JP S626971 B2 JPS626971 B2 JP S626971B2 JP 54119715 A JP54119715 A JP 54119715A JP 11971579 A JP11971579 A JP 11971579A JP S626971 B2 JPS626971 B2 JP S626971B2
- Authority
- JP
- Japan
- Prior art keywords
- sheet
- stretching
- forming
- stretched
- molding
- 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
- 238000000034 method Methods 0.000 claims description 14
- 238000000465 moulding Methods 0.000 claims description 14
- 239000002985 plastic film Substances 0.000 claims description 8
- 229920001887 crystalline plastic Polymers 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
Landscapes
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Description
【発明の詳細な説明】
本発明は未延伸のプラスチツクシートを延伸し
てから圧空成形法等により成形する方法に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of stretching an unstretched plastic sheet and then forming it by air pressure forming or the like.
近年プラスチツク、特にポリエステルやポリプ
ロピレン等の結晶性プラスチツクの延伸シートを
成形型に沿つて圧空成形等により成形することに
よつて延伸シートの有する耐熱性、物理的強度、
気体遮断性などの優れた特性を受け縦いだ成形品
を製造しようという試みがなされている。従来は
既に延伸された延伸シートを対象として延伸とは
別工程で成形を行う方法が一般的であつたが、結
晶性プラスチツクの延伸シートは成形が困難であ
り目的とする特性の成形品を得るためには成形条
件に合せて延伸シートの物性も関連して調整し得
ることが望ましく、延伸と成形とが別工程の場合
これが難かしいという問題があつた。 In recent years, the heat resistance, physical strength, and
Attempts have been made to produce molded products with excellent properties such as gas barrier properties. In the past, it was common practice to form a stretched sheet that had already been stretched in a process separate from stretching, but since stretched sheets of crystalline plastic were difficult to mold, it was difficult to form a molded product with the desired characteristics. For this purpose, it is desirable to be able to adjust the physical properties of the stretched sheet in accordance with the molding conditions, but this is difficult when stretching and molding are separate processes.
これに対し、長尺の未延伸シートを延伸ロール
やテンターなどの機構を有する連続式延伸装置に
より延伸し、その直後に成形装置を連結して延伸
―成形を一貫工程で行うことが考えられたが、延
伸工程は連続運動であり成形装置は間歇運動であ
るので両者の動きを同調させるために中間に配し
たダンサーロール等を介して長尺シートを移送す
るかあるいは、成形装置自体を長尺シートの連続
的な進行に合せて移動させながら成形できるよう
に構成するなどの必要があり装置全体が極めて大
掛りになり高価につくものであつた。また、上記
連続延伸装置の延伸スピードは基本的に成形機の
成形スピードよりも相当高速であるので、両者を
一貫工程とした場合一般に延伸装置の能力をフル
に発揮できないという問題もあつた。 On the other hand, it has been considered to stretch a long unstretched sheet using a continuous stretching device equipped with a mechanism such as a stretching roll or a tenter, and immediately connect a forming device to perform the stretching and forming process in an integrated process. However, since the stretching process is a continuous motion and the forming device is an intermittent motion, in order to synchronize the movements of the two, the long sheet is transported via a dancer roll placed in the middle, or the forming device itself is moved to a long sheet. It is necessary to configure the apparatus so that it can be molded while moving it in accordance with the continuous progress of the sheet, making the entire apparatus extremely large and expensive. Furthermore, since the stretching speed of the continuous stretching device is basically much higher than the forming speed of the molding machine, there is a problem that the full capacity of the stretching device cannot be fully utilized when both are integrated processes.
本発明者らは上述の諸点を解決せんと検討した
結果長尺シートではなく枚葉シートをバツチ式の
延伸装置により延伸するとともにその延伸装置自
体を成形装置内に移動してシートを成形位置にセ
ツトすることにより延伸―成形を合理的に一貫工
程にまとめ得ることを見い出し本発明に到達した
ものでその要旨は枚葉の未延伸プラスチツクシー
トの周囲を延伸枠により把持し延伸するとともに
シートを把持したままで把持枠を成形装置内に移
動させることにより前記シートを所定の成形装置
に載置して、しかる後に延伸後の前記シートを成
形することを特徴とするプラスチツクシートの成
形方法である。 The inventors of the present invention investigated how to solve the above-mentioned problems, and as a result, they stretched single-fed sheets instead of long sheets using a batch-type stretching device, and moved the stretching device itself into a forming device to bring the sheet to the forming position. The present invention was developed by discovering that stretching and forming can be rationally combined into an integrated process by setting the plastic sheet in a single sheet. This method of forming a plastic sheet is characterized in that the sheet is placed on a predetermined forming apparatus by moving the holding frame into the forming apparatus while the plastic sheet is held in place, and then the stretched sheet is formed.
以下、本発明を図面に基き詳細に説明する。 Hereinafter, the present invention will be explained in detail based on the drawings.
第１図は本発明を実施するための成形装置の一
例を示す正面略図、第２図は同じく平面略図であ
る。第２図において、２，２′は延伸枠であつ
て、２は延伸前の、また２′は延伸後の状態を示
す。 FIG. 1 is a schematic front view showing an example of a molding apparatus for carrying out the present invention, and FIG. 2 is a schematic plan view. In FIG. 2, reference numerals 2 and 2' indicate stretching frames, where 2 shows the state before stretching and 2' shows the state after stretching.
第１図及び第２図において、枚葉の未延伸シー
ト１の周囲を、成形装置３の外部にある延伸枠２
によつて把持しヒーター４により延伸温度に加熱
する。ついで未延伸のシート１を延伸しながら延
伸枠２自体を搬送レール５上を移動させて成形装
置３内に搬入し２′の状態に止める。こうしてシ
ート１′を延伸しかつ成形位置に載置したら成形
型６を降してシート１を圧空チヤンバー７との間
に挾持固定して圧空成形するのである。 1 and 2, a stretching frame 2 outside the forming apparatus 3 surrounds a single unstretched sheet 1.
It is gripped by a roller and heated to a stretching temperature by a heater 4. Then, while stretching the unstretched sheet 1, the stretching frame 2 itself is moved on the conveyor rail 5, carried into the forming apparatus 3, and stopped at the state 2'. After the sheet 1' has been stretched and placed in the molding position, the mold 6 is lowered and the sheet 1 is clamped and fixed between the pneumatic chamber 7 and pneumatically formed.
本発明は延伸及び成形が可能な枚葉シートであ
れば適用し得るが、ポリエステルやポリプロピレ
ンなどの結晶性プラスチツクからなるシートは延
伸してから成形することにより極めて優れた耐熱
性を有する成形品を得ることができるので特に好
ましく適用し得る。 The present invention can be applied to any sheet that can be stretched and molded, but sheets made of crystalline plastics such as polyester and polypropylene can be stretched and then molded to produce molded products with extremely excellent heat resistance. Since it can be obtained, it can be applied particularly preferably.
延伸枠２は枚葉の未延伸シートを延伸するとと
もにそれ自体が成形装置内に移動することにより
シートを成形位置に搬入可能な構造であれば良い
が、例えば第２図に示すように互いに直交する一
対の固定アーム８，８′に対しそれぞれ一対の移
動アーム９，９′がシリンダー１０によつて移動
しそれに伴い、多数のクリツプ１１を備えたパン
タグラフ１２が伸張してクリツプ１１の間隔が拡
大し、クリツプにより周囲を把持された未延伸シ
ート１を延伸する形式のものが、構造が単純なの
で装置自体の移動が容易でありまた延伸倍率や延
伸速度を成形条件に合せて容易に調整し得るので
好ましい。シート１を把持した延伸枠２には車輪
がついており搬送レール５の上をエアシリンダー
１３により成形装置３内に移動できる。この延伸
枠２に未延伸シート１を供給する際に、シート吸
引機構を備えた供給装置１４により自動的に行な
つてもよく、この場合には供給装置１４にヒータ
ー１５を配し供給と同時にシートを延伸温度に加
熱しておけば供給後、直ちに延伸することができ
好ましい。またシート１を延伸するのは延伸枠を
移動させる前でもさせた後でもあるいは移動中に
行なつてもよいが、移動中に同時に延伸するのが
最も時間的ロスが少なく好ましい。 The stretching frame 2 may be of any structure as long as it can stretch a single unstretched sheet and transport the sheet to the forming position by moving it into the forming apparatus, but for example, as shown in FIG. A pair of movable arms 9, 9' are moved by the cylinder 10 with respect to a pair of fixed arms 8, 8', and accordingly, the pantograph 12 equipped with a large number of clips 11 is extended, and the interval between the clips 11 is expanded. However, the device of the type that stretches the unstretched sheet 1 held around the periphery by clips has a simple structure, so the device itself can be easily moved, and the stretching ratio and stretching speed can be easily adjusted to match the molding conditions. Therefore, it is preferable. The stretching frame 2 holding the sheet 1 is equipped with wheels and can be moved into the forming apparatus 3 on the conveyor rail 5 by an air cylinder 13. When feeding the unstretched sheet 1 to the stretching frame 2, it may be automatically carried out using a feeding device 14 equipped with a sheet suction mechanism. It is preferable to heat the sheet to the stretching temperature so that it can be stretched immediately after being supplied. Further, the sheet 1 may be stretched before or after the stretching frame is moved, or while the stretching frame is being moved, but it is preferable to stretch the sheet 1 at the same time while the stretching frame is being moved, since it minimizes time loss.
次に延伸後のシート１を所定の成形位置に載置
する時は第１図のように成形型６と圧空チヤンバ
ー７との間に挾持するほか、別個に設けたクラン
プ装置によつて固定してもよく、要するに成形時
にシート１が内部に引き込まれてしわがよらない
ようにシート１の周囲を固定すれば良い。このこ
とにより、成形時にはもはや延伸枠による把持は
不要となるので成形工程の終了を待つことなく
２′位置の延伸枠を元の２位置に復帰させて未延
伸シートの受入準備を行なうことができる。この
場合延伸枠２′の移動アーム９がシリンダー、パ
ンタグラフとともに第１図に示すようにａ位置か
らｂ位置に移動可能としておけば、成形型６が降
りていても延伸枠２′を２の位置に復帰できるの
で好ましい。 Next, when the stretched sheet 1 is placed in a predetermined molding position, it is not only clamped between the mold 6 and the compressed air chamber 7 as shown in Fig. 1, but also fixed using a separately provided clamping device. In short, the periphery of the sheet 1 may be fixed to prevent the sheet 1 from being drawn into the interior and wrinkled during molding. As a result, it is no longer necessary to hold the stretching frame during forming, so the stretching frame at the 2' position can be returned to the original 2 positions and preparations for receiving the unstretched sheet can be made without waiting for the completion of the forming process. . In this case, if the movable arm 9 of the stretching frame 2' is movable together with the cylinder and pantograph from position a to position b as shown in FIG. This is preferable because it allows you to return to .
また成形装置３としては圧空成形機のほか真空
成形機、プレス成形機等が用いられるが、特に結
晶性プラスチツクのシートは延伸すると抗張力が
大きくなるので成形圧力の大きい圧空成形機、プ
レス成形機が好ましい。ここでシートを成形温度
に加熱するためにはヒーター４により延伸のため
の加熱と兼ねて行なつているが、所望により別個
の加熱装置（図示せず）により加熱してもよい。 In addition, as the forming device 3, in addition to an air pressure forming machine, a vacuum forming machine, a press forming machine, etc. are used. In particular, since the tensile strength of crystalline plastic sheets increases when they are stretched, air forming machines and press forming machines with high forming pressure are used. preferable. Here, in order to heat the sheet to the forming temperature, the heater 4 is used to heat the sheet for stretching, but heating may be performed using a separate heating device (not shown) if desired.
次にこのようにして成形されたシート１を成形
装置３から取り出すためには適宜の手段を用い得
るが、例えば第１図及び第２図に示すように搬送
レール５の上をシリンダー１７等により移動可能
とした搬出機１６にクリツプや真空吸着器等を設
けておき、成形が終了し成形型６が上昇した後搬
出機１６を成形装置３内に移動させて、クリツプ
等により、延伸枠２により把持されていたシート
１の周囲を把持して元の位置に復帰させ製品受台
１７に集積することができる。 Next, any suitable means can be used to take out the sheet 1 formed in this way from the forming apparatus 3, but for example, as shown in FIGS. A movable unloading machine 16 is equipped with clips, a vacuum suction device, etc., and after molding is completed and the mold 6 has been raised, the unloading machine 16 is moved into the molding apparatus 3, and the stretching frame 2 is fixed with a clip or the like. It is possible to grip the periphery of the sheet 1 that was being gripped by the gripper, return it to its original position, and stack it on the product holder 17.
以上詳述したように本発明の成形方法によれば
枚葉の未延伸プラスチツクシートを簡単な装置に
より一貫した工程で合理的に延伸―成形すること
ができ、しかも延伸工程における倍率、温度など
の条件を調整することによりシートの物性を成形
条件に合せて容易に調整できるなどこれまでにな
く優れた方法である。 As described in detail above, according to the forming method of the present invention, single unstretched plastic sheets can be stretched and formed in a consistent process using a simple device, and moreover, the stretching ratio, temperature, etc. This is an unprecedented method that allows the physical properties of the sheet to be easily adjusted to match the molding conditions by adjusting the conditions.
第１図は本発明を実施するための装置の一例を
示す正面略図、第２図は同じく平面略図である。
１……シート、２……延伸枠、３……成形装
置。
FIG. 1 is a schematic front view showing an example of an apparatus for implementing the present invention, and FIG. 2 is a schematic plan view. 1... Sheet, 2... Stretching frame, 3... Molding device.
Claims (1)
伸枠により把持し延伸するとともにシートを把持
したままで延伸枠を成形装置内に移動させること
により前記シートを所定の成形位置に載置して、
しかる後に延伸後の前記シートを成形することを
特徴とするプラスチツクシートの成形方法。1. Gripping and stretching the periphery of a single unstretched plastic sheet with a stretching frame, and moving the stretching frame into a molding device while gripping the sheet to place the sheet at a predetermined molding position,
A method for forming a plastic sheet, which comprises subsequently forming the stretched sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11971579A JPS5644627A (en) | 1979-09-18 | 1979-09-18 | Molding of plastic sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11971579A JPS5644627A (en) | 1979-09-18 | 1979-09-18 | Molding of plastic sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5644627A JPS5644627A (en) | 1981-04-23 |
| JPS626971B2 true JPS626971B2 (en) | 1987-02-14 |
Family
ID=14768308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11971579A Granted JPS5644627A (en) | 1979-09-18 | 1979-09-18 | Molding of plastic sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5644627A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020071376A1 (en) | 2018-10-01 | 2020-04-09 | 国立研究開発法人産業技術総合研究所 | Electrochemical catalyst, assembly, electrochemical reactor, hydrocarbon generation system and method for generating hydrocarbon |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4475881A (en) * | 1982-09-14 | 1984-10-09 | Placon Corporation | Thermoforming of plastic sheet material |
| EP0627638A1 (en) * | 1993-06-02 | 1994-12-07 | Hughes Aircraft Company | Elliptical diffuser |
| JP2767388B2 (en) * | 1994-08-12 | 1998-06-18 | 株式会社島津 | Plastic molding method and molding apparatus |
| JP4250107B2 (en) * | 2004-02-13 | 2009-04-08 | 富士フイルム株式会社 | Film stretching machine |
| JP5131003B2 (en) * | 2008-04-07 | 2013-01-30 | 株式会社村田製作所 | Resin film manufacturing apparatus and method |
| JP5617796B2 (en) * | 2011-08-10 | 2014-11-05 | トヨタ車体株式会社 | Vacuum forming method for interior parts and vacuum forming apparatus for interior parts |
| GB2556009B (en) * | 2015-09-17 | 2020-12-30 | Honda Motor Co Ltd | Resin molding method and resin molding device |
-
1979
- 1979-09-18 JP JP11971579A patent/JPS5644627A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020071376A1 (en) | 2018-10-01 | 2020-04-09 | 国立研究開発法人産業技術総合研究所 | Electrochemical catalyst, assembly, electrochemical reactor, hydrocarbon generation system and method for generating hydrocarbon |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5644627A (en) | 1981-04-23 |
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