JPH07195477A - Method and device for producing resin sheet having foaming capability - Google Patents
Method and device for producing resin sheet having foaming capabilityInfo
- Publication number
- JPH07195477A JPH07195477A JP5353378A JP35337893A JPH07195477A JP H07195477 A JPH07195477 A JP H07195477A JP 5353378 A JP5353378 A JP 5353378A JP 35337893 A JP35337893 A JP 35337893A JP H07195477 A JPH07195477 A JP H07195477A
- Authority
- JP
- Japan
- Prior art keywords
- die
- sheet
- refrigerant liquid
- foaming
- resin sheet
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0019—Combinations of extrusion moulding with other shaping operations combined with shaping by flattening, folding or bending
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は発泡能力を有する樹脂シ
ートの製造方法および装置に関する。詳しくは、熱可塑
性樹脂発泡シートを連続的に生産するための一方法であ
るところの、先ず発泡能力を有する未発泡シートを予め
作成し、これを加熱して発泡シートとする手法の前半段
階に用いる未発泡シートの製造方法および装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for producing a resin sheet having a foaming ability. Specifically, one method for continuously producing a thermoplastic resin foamed sheet is to first create an unfoamed sheet having a foaming ability in advance, and heat it to form a foamed sheet in the first half stage. The present invention relates to a method and an apparatus for producing an unfoamed sheet.
【０００２】発泡能力を有する未発泡シートを加熱して
発泡シートを得る手法は、比較的低倍率（１．５〜５倍
程度）の発泡シートの連続生産に有効である。このよう
な比較的、低倍率の発泡シートは軽量で且つ断熱性があ
り、高比強度を示す等の特性を有するため、食品用トレ
ー、建築部材、自動車部材、その他一般工業部材と多岐
に亘り用いられている。中でも食品用トレーは自動車部
材や一般工業部材とは違い、食品を入れた容器として直
接目に触れるために美麗性や、時には印刷性さえも必要
とされる。The technique of heating an unfoamed sheet having a foaming ability to obtain a foamed sheet is effective for continuous production of a foamed sheet having a relatively low magnification (about 1.5 to 5 times). Such a relatively low-magnification foam sheet is lightweight and has heat insulating properties, and since it has characteristics such as high specific strength, it is widely used in food trays, building members, automobile members, and other general industrial members. It is used. Among them, the tray for food is required to have beauty and sometimes even printability because it is directly exposed as a container containing food, unlike automobile parts and general industrial parts.
【０００３】[0003]
【従来の技術】発泡樹脂シートの用途は食品用トレー、
自動車部材、一般工業部材等の多岐に亘るが、これら発
泡樹脂シートの成形方法もまたさまざまである。発泡成
形はビーズ発泡成形と押出発泡成形に大別することがで
きるが、本発明は押出発泡のシート成形に関するもので
ある。2. Description of the Related Art Foamed resin sheets are used for food trays,
There are a wide variety of automobile parts, general industrial parts, and the like, and there are various molding methods for these foamed resin sheets. The foam molding can be roughly divided into bead foam molding and extrusion foam molding, but the present invention relates to sheet molding of extrusion foam.
【０００４】押出発泡によるシート成形は発泡剤を含有
する溶融樹脂をダイスよりシート状で吐出させると同時
に発泡（以下、直接発泡法と称す）させ、これを内部冷
却された冷却ロール群を通過させるか、冷却水槽に導き
これを一本のターンロールを経て引き取り、製品とする
方法が一般的であった。In sheet molding by extrusion foaming, a molten resin containing a foaming agent is discharged in a sheet form from a die and simultaneously foamed (hereinafter referred to as a direct foaming method), which is passed through a group of internally cooled cooling rolls. Alternatively, it is a general method that the product is introduced into a cooling water tank and taken through a single turn roll to obtain a product.
【０００５】また、別の方法は、発泡剤を含有した樹脂
シートを実質的に発泡を抑制した状態で予め成形し（以
下、原反と称す）、この原反を再加熱（以下、再加熱法
と称す）することによってスキン層を有する発泡樹脂シ
ートを形成するものである。この発泡方法には既に特開
平４−３６４９３０や特願平１−１５００５８３などが
あるが、これらは従来の直接発泡法と比較して技術的に
大きく異なるものである。Another method is to pre-form a resin sheet containing a foaming agent in a state in which foaming is substantially suppressed (hereinafter referred to as a raw sheet), and re-heat the raw sheet (hereinafter, re-heated). Method) to form a foamed resin sheet having a skin layer. This foaming method already includes Japanese Patent Application Laid-Open No. 4-364930 and Japanese Patent Application No. 1-1500583, which are technically significantly different from the conventional direct foaming method.
【０００６】そのうち、直接発泡法と最も異なり、かつ
再加熱法にとって重要な点は、発泡を抑制した原反を成
形することであり、そのためダイス直後におけるシート
の冷却条件である。何故なら、気泡の存在する原反を再
加熱すると発泡シートにボイド（巨大気泡）が発生し、
物性をはじめ種々の面で悪影響を及ぼすからである。Among them, the most important point in the reheating method, which is different from the direct foaming method, is to form a raw material in which foaming is suppressed, and therefore, the cooling condition of the sheet immediately after the die is used. The reason is that when the original fabric with air bubbles is reheated, voids (giant air bubbles) are generated in the foam sheet,
This is because it has an adverse effect on various aspects including physical properties.
【０００７】図５は従来の原反成形方法を示す図で、同
図（ａ）は、熱可塑性樹脂を押し出しダイス１からシー
ト状に押し出し、その押し出された樹脂シート２を冷媒
液槽３に満たされた冷媒液４の中をくぐらせ、急冷し、
ターンロール５，６を経て駆動引取ロール７，８で引取
る方法である。FIG. 5 is a view showing a conventional method for forming a raw material. In FIG. 5 (a), a thermoplastic resin is extruded in a sheet form from an extrusion die 1, and the extruded resin sheet 2 is placed in a refrigerant liquid tank 3. Pass through the filled refrigerant liquid 4 and quench,
This is a method in which the drive take-up rolls 7 and 8 pass through the turn rolls 5 and 6.
【０００８】また同図（ｂ）に示す方法は、熱可塑性樹
脂を押し出しダイス１からシート状に押し出し、その押
し出された樹脂シート２を水冷された複数の冷却ロール
９−１〜９−４の間を通して冷却する方法である。In the method shown in FIG. 1B, a thermoplastic resin is extruded from an extrusion die 1 into a sheet shape, and the extruded resin sheet 2 is cooled by a plurality of cooling rolls 9-1 to 9-4. It is a method of cooling through.
【０００９】[0009]
【発明が解決しようとする課題】上記従来のシートを成
形する方法において、（ａ）図で説明した方法は、押し
出しダイス１で押し出された樹脂シート２は押し出しに
より自然に発生する波打ちなどがそのまま固定されてし
まう。また（ｂ）図で説明した方法では、ロールに引き
取って巻き付ける側の片面しか充分に冷却することがで
きない。In the above-mentioned conventional method for forming a sheet, the method described with reference to (a) of FIG. It will be fixed. Further, according to the method described with reference to FIG. (B), only one side of the side which is taken up by the roll and wound can be sufficiently cooled.
【００１０】従って、これら従来法では微妙なコントロ
ールと細心の注意を払っても、発泡したり反りや歪のあ
る原反が成形されるという問題があった。Therefore, these conventional methods have a problem in that a raw material having foaming, warping or distortion is formed even if delicate control and careful attention are paid.
【００１１】本発明は上記従来の問題点に鑑み、表面状
態及び平滑性の優れた発泡能力を有する樹脂シートの製
造方法および装置を実現しようとする。In view of the above-mentioned conventional problems, the present invention intends to realize a method and an apparatus for producing a resin sheet having an excellent foaming ability with excellent surface condition and smoothness.
【００１２】[0012]
【課題を解決するための手段】本発明の発泡能力を有す
る樹脂シートの製造装置に於いては、ダイスから押し出
された発泡可能な溶融樹脂を、急冷し発泡を抑制しなが
ら固相化させる発泡能力を有する樹脂シートの製造装置
であって、溶融樹脂を押し出すダイスと、該ダイスの下
方に設けられた冷媒液槽と、該冷媒液槽内の液面を調整
する液面調整機構と、該冷媒液槽内に装備された１対の
挟圧ロールと、該挟圧ロールを上下に変位させる変位機
構とを具備して成ることを特徴とする。In the apparatus for producing a resin sheet having a foaming ability of the present invention, a foamable molten resin extruded from a die is rapidly cooled and solidified while suppressing foaming. An apparatus for producing a resin sheet having the capability, a die for extruding a molten resin, a refrigerant liquid tank provided below the die, a liquid level adjusting mechanism for adjusting the liquid level in the refrigerant liquid tank, It is characterized in that it comprises a pair of pinching rolls provided in the refrigerant liquid tank and a displacement mechanism for vertically displacing the pinching rolls.
【００１３】本発明の発泡能力を有する樹脂シートの製
造方法に於いては、ダイスから押し出された発泡可能な
溶融樹脂を急冷し、発泡を抑制しながら固相化させる樹
脂シートの製造方法であって、ダイスから押し出された
溶融樹脂を冷媒液にほぼ下半分浸漬させた一対のローラ
間に導入し、該ローラで挟圧しつつ冷媒液およびローラ
で同時に冷却するようにしたことを特徴とする。The method for producing a resin sheet having a foaming ability according to the present invention is a method for producing a resin sheet in which a foamable molten resin extruded from a die is rapidly cooled and solidified while suppressing foaming. Then, the molten resin extruded from the die is introduced between a pair of rollers that are substantially immersed in the lower half of the refrigerant liquid, and the refrigerant liquid and the rollers simultaneously cool while sandwiching the rollers.
【００１４】[0014]
【作用】冷媒液槽内の液面の調整機構および１対の挟圧
ロールの変位機構を設けたことにより、挟圧ロールとダ
イスの先端との距離および冷媒液に対する挟圧ローラの
位置を発泡を抑制するのに最適となるように調節するこ
とができる。By providing the liquid level adjusting mechanism in the refrigerant liquid tank and the pair of pinching roll displacement mechanisms, the distance between the pinching roll and the tip of the die and the position of the pinching roller with respect to the refrigerant liquid are foamed. Can be adjusted to be optimal for suppressing
【００１５】また、挟圧ロールの下半分を冷媒液に浸漬
させることにより冷媒液による冷却とロールによる冷却
を同時に行ない、しかもこの冷却と同時に挟圧ロールに
よるシート表面の平滑化を行う。Further, by immersing the lower half of the pressure roller in the refrigerant liquid, cooling by the refrigerant liquid and cooling by the roll are simultaneously performed, and at the same time as this cooling, the sheet surface is smoothed by the pressure roller.
【００１６】[0016]
【実施例】図１は本発明の第１の実施例を示す図であ
る。同図において、１は発泡能力のある溶融した熱可塑
性樹脂をシート状に押し出すダイスであり、３は該ダイ
スの直下に設けられた冷媒液４を満した冷媒液槽であ
り、その液面は、冷媒液槽３内に対して冷媒液を供給・
排出する給排機構（液面調整機構）５０によって調整す
ることができるようになっている。なお、この液面は後
述する挟圧ロール１１，１２の上方から下方まで連続的
に変化させることができるようになっている。この冷媒
液槽３は上下調整駆動機構（変位機構）１０により上下
可動に支持されている。この上下調整駆動機構には、油
圧またはラックとピニオンによる機構又はねじ機構を用
いることができる。FIG. 1 is a diagram showing a first embodiment of the present invention. In the figure, 1 is a die for extruding a molten thermoplastic resin having a foaming ability into a sheet shape, 3 is a refrigerant liquid tank filled directly with a refrigerant liquid 4 provided directly under the die, and its liquid level is Supplying the refrigerant liquid into the refrigerant liquid tank 3
It can be adjusted by a supply / discharge mechanism (liquid level adjusting mechanism) 50 for discharging. The liquid surface can be continuously changed from the upper side to the lower side of the pinching rolls 11 and 12 described later. The refrigerant liquid tank 3 is supported by a vertical adjustment drive mechanism (displacement mechanism) 10 so as to be vertically movable. As the vertical adjustment drive mechanism, hydraulic pressure, a mechanism using a rack and pinion, or a screw mechanism can be used.
【００１７】また、該冷媒液槽３内には図示なき駆動源
により駆動される１対の挟圧ロール１１，１２が設けら
れている。そして、上下調整駆動機構１０により、この
挟圧ロール１１，１２が冷媒液槽３とともに上下動する
ようになっている。また冷媒液槽３の中及び外にはそれ
ぞれターンロール１３，１４が設けられている。また前
記ダイス１の先端は、挟圧ロール１１，１２に沿わせて
可能な限り鋭角にした断面形状に形成されていて、該挟
圧ロール１１，１２の接触部に極力接近させることがで
きるようになっている。A pair of pinching rolls 11 and 12 driven by a drive source (not shown) are provided in the refrigerant liquid tank 3. Then, by the vertical adjustment drive mechanism 10, the pinching rolls 11 and 12 are moved up and down together with the refrigerant liquid tank 3. Also, turn rolls 13 and 14 are provided inside and outside the refrigerant liquid tank 3, respectively. Further, the tip of the die 1 is formed in a cross-sectional shape that is as sharp as possible along the pressing rollers 11 and 12, so that it can be brought as close as possible to the contact portion of the pressing rollers 11 and 12. It has become.
【００１８】このような構成において、挟圧ロール１
１，１２は、上下調整駆動機構１０により冷媒液槽３と
ともに上昇され、ダイス１の先端が挟圧ロール１１，１
２の接触部に極力接近する位置にセットされる。また、
冷媒液槽３内の冷媒液４は、挟圧ロール１１，１２の下
半分が浸漬するように、液面が給排機構５０によって調
整される。そして、この挟圧ロール１１，１２が冷媒液
４によって冷却され、冷媒液４の冷却と挟圧ロール１
１，１２による冷却が同時に行われるようにセットされ
る。In such a structure, the pinching roll 1
1, 12 are lifted together with the refrigerant liquid tank 3 by the vertical adjustment drive mechanism 10, and the tip of the die 1 is pressed by the pressure rolls 11, 1.
It is set at a position as close as possible to the contact portion of 2. Also,
The liquid level of the refrigerant liquid 4 in the refrigerant liquid tank 3 is adjusted by the supply / discharge mechanism 50 so that the lower halves of the pinching rolls 11 and 12 are immersed. Then, the pinching rolls 11 and 12 are cooled by the refrigerant liquid 4, and the cooling of the refrigerant liquid 4 and the pinching roll 1 are performed.
It is set so that cooling by 1 and 12 is performed simultaneously.
【００１９】しかして、ダイス３から押し出されたシー
ト２は、挟圧ロール１１，１２に導入されると同時に冷
媒液４中に進入され、冷媒液４および挟圧ロール１１，
１２によって同時に冷却され、しかもこの挟圧ロール１
１，１２によって表面が平滑化される。Thus, the sheet 2 extruded from the die 3 is introduced into the pinching rolls 11 and 12 and at the same time enters the refrigerant liquid 4, so that the refrigerant liquid 4 and the pinching rolls 11 and 12 are inserted.
It is simultaneously cooled by 12, and this pinching roll 1
1, 12 smoothes the surface.
【００２０】以上の構成によれば、ダイス３の先端と挟
圧ロール１１，１２の接触部との距離が可能な限り近接
したので、シート２の発泡が開始する前に挟圧ロール１
１，１２に導入し冷却することができる。すなわち、ダ
イス１の直後でシート２を素早く冷却することができ
る。従って、シート２を未発泡状態に冷却することがで
きる（発泡を抑制することができる）。According to the above construction, since the distance between the tip of the die 3 and the contact portion of the pressure rolls 11 and 12 is as close as possible, the pressure roll 1 is formed before the foaming of the sheet 2 is started.
1, 12 can be introduced and cooled. That is, the sheet 2 can be quickly cooled immediately after the die 1. Therefore, the sheet 2 can be cooled to an unfoamed state (foaming can be suppressed).
【００２１】また、この挟圧ロール１１，１２は、下半
分が冷媒液４に浸漬しているため、シート２は、挟圧ロ
ール１１，１２および冷媒液４によって同時に冷却され
るとともに表面が平滑化される。従って、シート２の表
面を平滑化しつつ急速にかつ効果的に冷却することがで
きるので、シート２をさらに確実に未発泡状態に冷却す
ることができる。Since the lower halves of the pressure rolls 11 and 12 are immersed in the refrigerant liquid 4, the sheet 2 is cooled by the pressure rolls 11 and 12 and the coolant liquid 4 at the same time, and the surface is smooth. Be converted. Therefore, the surface of the sheet 2 can be rapidly and effectively cooled while smoothing the surface thereof, so that the sheet 2 can be more surely cooled to the unfoamed state.
【００２２】また、挟圧ロール１１，１２は、冷媒液４
に浸漬させて冷却するようにしたので、挟圧ロール１
１，１２に複雑な冷却機構を設ける必要がない。また、
ダイス１に対する挟圧ロール１１，１２の位置および挟
圧ロール１１，１２に対する冷媒液４の位置を調整でき
るので、最適な未発泡シート２を簡単に得ることができ
る。The pinching rolls 11 and 12 are connected to the refrigerant liquid 4
Since it was soaked in and cooled,
It is not necessary to provide a complicated cooling mechanism for 1 and 12. Also,
Since the positions of the pressing rolls 11 and 12 with respect to the die 1 and the position of the refrigerant liquid 4 with respect to the pressing rolls 11 and 12 can be adjusted, the optimum unfoamed sheet 2 can be easily obtained.
【００２３】図２は本発明の第２の実施例を示す図であ
る。本実施例が前実施例と異なるところは、冷媒液槽３
の中に挟圧ロール１１，１２に後続して反り修正用のロ
ール群１５−１〜１５−ｎを設けたことであり、他は前
実施例と同様である。なおロール群１５−１〜１５−ｎ
の配置は図３（ａ）に示す千鳥型配置、又は図３（ｂ）
に示す対向型配置の何れをも用いることができる。FIG. 2 is a diagram showing a second embodiment of the present invention. This embodiment is different from the previous embodiment in that the refrigerant liquid tank 3
In this example, the warping correction roll groups 15-1 to 15-n are provided subsequent to the pinching rolls 11 and 12, and the others are the same as in the previous embodiment. The roll groups 15-1 to 15-n
The staggered arrangement shown in FIG. 3 (a) or the arrangement shown in FIG. 3 (b)
Any of the opposed arrangements shown in can be used.
【００２４】このように構成された本実施例は、前実施
例と同様な効果がある上、挟圧ロール１１，１２を通過
した樹脂シート２を未だ完全に冷却される以前に反り修
正用ロール群１５−１〜１５−ｎを通すことによりシー
ト全体の反りや歪を除去することができる。なお、ロー
ル群１５−１，１５−３…および１５−２，１５−４…
には、スチールやゴム等からなるベルトを掛け渡し、こ
のベルト間を通過させるようにしてもよい。The present embodiment thus constructed has the same effect as the previous embodiment, and in addition, the warp correction roll before the resin sheet 2 which has passed through the pinching rolls 11 and 12 is still completely cooled. The warpage and distortion of the entire sheet can be removed by passing the groups 15-1 to 15-n. The roll groups 15-1, 15-3 ... And 15-2, 15-4 ...
Alternatively, a belt made of steel, rubber or the like may be stretched over and passed between the belts.
【００２５】図４は本発明の第３の実施例を示す図であ
る。本実施例が前実施例と異なるところは、対向する挟
圧ロール１１，１２のそれぞれに水切りロール１６，１
７を接触するように配設したことで、他は前実施例と同
様である。FIG. 4 is a diagram showing a third embodiment of the present invention. The present embodiment is different from the previous embodiment in that the draining rolls 16 and 1 are respectively provided to the opposing pressing rolls 11 and 12.
Others are the same as in the previous embodiment by disposing 7 in contact with each other.
【００２６】このように構成された本実施例は次の様な
効果を有する。水切りロールがない場合、成形速度が高
速化すると挟圧ロール１１，１２に冷媒液４を巻き込
み、シートに冷却むらを生ずることがある。このような
場合本実施例の水切りロール１６，１７は挟圧ロール１
１，１２の冷媒液巻き込みを防止することができる。The present embodiment configured as described above has the following effects. If there is no water draining roll, when the molding speed is increased, the refrigerant liquid 4 may be entangled in the pinching rolls 11 and 12, causing uneven cooling of the sheet. In such a case, the draining rolls 16 and 17 of this embodiment are the pressing rolls 1.
It is possible to prevent the inclusion of the refrigerant liquids 1 and 12.
【００２７】上記実施例を用いた実施例として、ポリプ
ロピレンをベースとし、窒素ガスを発泡剤とした再加熱
発泡用の原反成形を試みた結果、発泡がほぼ完全に抑制
され、かつ表面状態も挟圧ロール表面の鏡面状態が転写
され、従来装置では得られなかった反りや歪の少ない樹
脂シートを得ることができた。なお、この原反を再加熱
発泡させて平滑な表面を有するポリプロピレン発泡シー
トが得られることも確認された。これらは外観や印刷性
にも優れたシートであった。As an example using the above-mentioned examples, as a result of trying a raw fabric for reheating foaming using polypropylene as a base and nitrogen gas as a foaming agent, foaming was almost completely suppressed, and the surface condition was also improved. The mirror-like state of the surface of the pressing roll was transferred, and a resin sheet with less warpage and distortion, which could not be obtained with the conventional apparatus, could be obtained. It was also confirmed that this raw fabric was reheated and foamed to obtain a polypropylene foam sheet having a smooth surface. These were sheets having excellent appearance and printability.
【００２８】[0028]
【発明の効果】本発明に依れば、発泡がほぼ完全に抑制
され、表面状態も良好な未発泡シート（発泡能力を有す
る樹脂シート）すなわち、発泡剤を含有した実質的に発
泡のない樹脂シートを効率よく得ることができる。EFFECTS OF THE INVENTION According to the present invention, an unfoamed sheet (a resin sheet having a foaming ability) in which foaming is almost completely suppressed and the surface condition is good, that is, a resin containing a foaming agent and substantially not foamed The sheet can be obtained efficiently.
【図１】本発明の第１の実施例を示す図である。FIG. 1 is a diagram showing a first embodiment of the present invention.
【図２】本発明の第２の実施例を示す図である。FIG. 2 is a diagram showing a second embodiment of the present invention.
【図３】本発明の第２の実施例の反り修正用ロール群の
配置例を示す図である。FIG. 3 is a diagram showing an arrangement example of a warp correction roll group according to a second embodiment of the present invention.
【図４】本発明の第３の実施例を示す図である。FIG. 4 is a diagram showing a third embodiment of the present invention.
【図５】従来の原反成形方法の２例を示す図である。FIG. 5 is a diagram showing two examples of a conventional original web forming method.
１…ダイス ２…樹脂シート ３…冷媒液槽 ４…冷媒液 １０…上下調整駆動機構（変位機構） １１，１２…挟圧ロール １３，１４…ターンロール １５−１〜１５−ｎ…反り修正用ロール群 １６，１７…水切りロール ５０…給排機構（液面調整機構） DESCRIPTION OF SYMBOLS 1 ... Die 2 ... Resin sheet 3 ... Refrigerant liquid tank 4 ... Refrigerant liquid 10 ... Vertical adjustment drive mechanism (displacement mechanism) 11, 12 ... Clamping roll 13, 14 ... Turn roll 15-1 to 15-n ... For warp correction Roll group 16, 17 ... Draining roll 50 ... Supply / discharge mechanism (liquid level adjustment mechanism)
【手続補正書】[Procedure amendment]
【提出日】平成６年３月９日[Submission date] March 9, 1994
【手続補正１】[Procedure Amendment 1]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】図１[Name of item to be corrected] Figure 1
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図１】 [Figure 1]
Claims (2)
樹脂を急冷し、発泡を抑制しながら固相化させる発泡能
力を有する樹脂シートの製造装置であって、 溶融樹脂を押し出すダイスと、該ダイスの下方に設けら
れた冷媒液槽と、該冷媒液槽内の液面を調整する液面調
整機構と、該冷媒液槽内に装備された１対の挟圧ロール
と、該挟圧ロールを上下に変位させる変位機構とを具備
したことを特徴とする発泡能力を有する樹脂シートの製
造装置。1. An apparatus for producing a resin sheet having a foaming ability for rapidly cooling a foamable molten resin extruded from a die and solidifying it while suppressing foaming, comprising a die for extruding the molten resin and the die. Of the refrigerant liquid tank, a liquid level adjusting mechanism for adjusting the liquid surface in the refrigerant liquid tank, a pair of pinching rolls mounted in the refrigerant liquid tank, and the pinching roll. An apparatus for manufacturing a resin sheet having a foaming ability, comprising a displacement mechanism for vertically displacing the resin sheet.
樹脂を急冷し、発泡を抑制しながら固相化させる樹脂シ
ートの製造方法であって、 ダイスから押し出された溶融樹脂を冷媒液にほぼ下半分
浸漬させた一対のローラ間に導入し、該ローラで挟圧し
つつ冷媒液およびローラで同時に冷却するようにしたこ
とを特徴とする発泡能力を有する樹脂シートの製造方
法。2. A method for producing a resin sheet, in which a foamable molten resin extruded from a die is rapidly cooled and solidified while suppressing foaming, and the molten resin extruded from the die is substantially cooled to a refrigerant liquid. A method for producing a resin sheet having a foaming ability, which is characterized in that the resin sheet is introduced between a pair of half-immersed rollers, and is cooled by the refrigerant liquid and the rollers at the same time while being pressed by the rollers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5353378A JPH07195477A (en) | 1993-12-29 | 1993-12-29 | Method and device for producing resin sheet having foaming capability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5353378A JPH07195477A (en) | 1993-12-29 | 1993-12-29 | Method and device for producing resin sheet having foaming capability |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07195477A true JPH07195477A (en) | 1995-08-01 |
Family
ID=18430437
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5353378A Pending JPH07195477A (en) | 1993-12-29 | 1993-12-29 | Method and device for producing resin sheet having foaming capability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07195477A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2272647A1 (en) * | 2009-07-10 | 2011-01-12 | Nordenia Technologies GmbH | Method of producing a single or multiple layer expandable film |
-
1993
- 1993-12-29 JP JP5353378A patent/JPH07195477A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2272647A1 (en) * | 2009-07-10 | 2011-01-12 | Nordenia Technologies GmbH | Method of producing a single or multiple layer expandable film |
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