JPS63183826A - Method and apparatus for controlling film thickness in extruder die - Google Patents
Method and apparatus for controlling film thickness in extruder dieInfo
- Publication number
- JPS63183826A JPS63183826A JP62016623A JP1662387A JPS63183826A JP S63183826 A JPS63183826 A JP S63183826A JP 62016623 A JP62016623 A JP 62016623A JP 1662387 A JP1662387 A JP 1662387A JP S63183826 A JPS63183826 A JP S63183826A
- Authority
- JP
- Japan
- Prior art keywords
- film
- die
- temperature
- extruded
- thickness
- 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
- 238000000034 method Methods 0.000 title claims abstract description 15
- 238000001125 extrusion Methods 0.000 claims abstract description 32
- 229920003002 synthetic resin Polymers 0.000 claims description 7
- 239000000057 synthetic resin Substances 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 abstract description 9
- 238000009826 distribution Methods 0.000 abstract description 7
- 239000007788 liquid Substances 0.000 abstract description 6
- 238000005266 casting Methods 0.000 abstract description 3
- 239000013056 hazardous product Substances 0.000 abstract 2
- 230000001419 dependent effect Effects 0.000 abstract 1
- 229920005989 resin Polymers 0.000 description 11
- 239000011347 resin Substances 0.000 description 11
- -1 polyethylene Polymers 0.000 description 4
- 229920000915 polyvinyl chloride Polymers 0.000 description 4
- 239000004800 polyvinyl chloride Substances 0.000 description 4
- WFDIJRYMOXRFFG-UHFFFAOYSA-N Acetic anhydride Chemical compound CC(=O)OC(C)=O WFDIJRYMOXRFFG-UHFFFAOYSA-N 0.000 description 3
- 239000004642 Polyimide Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229920001721 polyimide Polymers 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 2
- 239000004372 Polyvinyl alcohol Substances 0.000 description 2
- 231100001261 hazardous Toxicity 0.000 description 2
- 230000002085 persistent effect Effects 0.000 description 2
- 239000004417 polycarbonate Substances 0.000 description 2
- 229920000515 polycarbonate Polymers 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 229920002223 polystyrene Polymers 0.000 description 2
- 229920002451 polyvinyl alcohol Polymers 0.000 description 2
- ILJSQTXMGCGYMG-UHFFFAOYSA-N triacetic acid Chemical compound CC(=O)CC(=O)CC(O)=O ILJSQTXMGCGYMG-UHFFFAOYSA-N 0.000 description 2
- VLDPXPPHXDGHEW-UHFFFAOYSA-N 1-chloro-2-dichlorophosphoryloxybenzene Chemical compound ClC1=CC=CC=C1OP(Cl)(Cl)=O VLDPXPPHXDGHEW-UHFFFAOYSA-N 0.000 description 1
- ITQTTZVARXURQS-UHFFFAOYSA-N 3-methylpyridine Chemical compound CC1=CC=CN=C1 ITQTTZVARXURQS-UHFFFAOYSA-N 0.000 description 1
- HLBLWEWZXPIGSM-UHFFFAOYSA-N 4-Aminophenyl ether Chemical compound C1=CC(N)=CC=C1OC1=CC=C(N)C=C1 HLBLWEWZXPIGSM-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 239000002243 precursor Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
-
- 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
-
- 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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
- B29C48/865—Heating
-
- 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
- B29C48/92—Measuring, controlling or regulating
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92609—Dimensions
- B29C2948/92647—Thickness
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92504—Controlled parameter
- B29C2948/92704—Temperature
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92857—Extrusion unit
- B29C2948/92904—Die; Nozzle zone
-
- 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
- B29C2948/00—Indexing scheme relating to extrusion moulding
- B29C2948/92—Measuring, controlling or regulating
- B29C2948/92819—Location or phase of control
- B29C2948/92971—Fluids, e.g. for temperature control or of environment
Abstract
Description
【発明の詳細な説明】
「産業上の利用分野」
本発明は押出ダイによる合成樹脂フィルムの製造におい
て、押出フィルムの厚さを制御する方法及び装置に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION "Field of Industrial Application" The present invention relates to a method and apparatus for controlling the thickness of an extruded film in the production of a synthetic resin film using an extrusion die.
「従来技術と問題点」
押出フィルムの中方向の厚さ分布は、直接的にはフィル
ムの需要家側の要求する規格の範囲内になければならな
いが、その範囲内にある場合でも、厚さの片寄りが連続
的且つ持続的な場合には重なり合って累積され、フィル
ムを巻物にした際に、フィルムに歪を与え実用上障害と
なる。"Prior art and problems" The thickness distribution in the middle direction of an extruded film must be directly within the standard range required by the film consumer, but even if it is within that range, the thickness distribution If the deviation is continuous and persistent, they will overlap and accumulate, causing distortion to the film when it is made into a roll, which is a practical problem.
従来、押出フィルムの中方向の厚さ分布を調節する方法
として、電気ヒーターを複数個設置して各レーンを通過
する樹脂の量を調節する方法（特開昭４９−４５９６４
＞、ダイノ１１ｖ１ホルトニヨり樹脂の通過する流路の
空間を変更する方法、更には上記関節ボルトの代わりに
ヒートボルトを用いて同様の効果を得る方法があった。Conventionally, as a method for adjusting the thickness distribution in the medial direction of an extruded film, a method was used in which multiple electric heaters were installed to adjust the amount of resin passing through each lane (Japanese Patent Laid-Open No. 49-45964
There was a method of changing the space of the flow path through which the resin passes, and a method of obtaining the same effect by using a heat bolt instead of the above-mentioned joint bolt.
しかし、これらの方法は／ｉ５Ｉ険物のガス雰ｖＢ気下
では電気的に安全な構造とするのが難しいこと、或いは
可動部分があり、周囲をクリーンに保つのが困難であっ
た。又、＆Ｉ節ボルトを自動的にモーター等により調節
する方法は大きな空間を必要とするという問題を包含し
ていた。However, with these methods, it is difficult to create an electrically safe structure in a hazardous gas atmosphere, or there are moving parts, making it difficult to keep the surrounding area clean. Further, the method of automatically adjusting the &I section bolt using a motor or the like involves the problem of requiring a large space.
押出フィルムの巾方向の厚さの片寄りを関節する他の方
法、又は厚さの片寄りを連続的且つ持続的な場合の累積
を防止する方法として、フィルムの巻取部に於いて、耳
端フラットの位置を必要に応じて中方向にずらす方法、
押出ダイ自身を中方向に移動させる方法、更には神山’
ＡＭ自身は中方向にずらし、押出フィルムの耳端部の位
置を一定にした方法（特許公告間３９−１４５３４）が
ある、しかし、これらの方法は、予め耳：ａＲＩＳを余
分に必要とし製品化の収率を下げることとなり、或いけ
ダイ内の耳端部に可動部分を要するため樹脂の滞留部分
が生し、製品に劣化したＩＨ脂が混入する原因となる、
等の問題を孕んでいる。As another method for controlling the thickness deviation in the width direction of the extruded film, or as a method for preventing the accumulation of continuous and persistent thickness deviation, it is possible to How to shift the position of the end flat in the middle direction if necessary,
How to move the extrusion die itself in the middle direction, and furthermore, Kamiyama'
There is a method (Patent Publication No. 39-14534) in which the AM itself is shifted in the middle direction and the position of the edge of the extruded film is kept constant.However, these methods require an extra edge: aRIS in advance and are difficult to commercialize. This reduces the yield of IH resin, and requires a movable part at the end of the die, which creates a stagnation area of resin, which causes degraded IH fat to be mixed into the product.
It is fraught with problems such as.
「間８点を解決するための手段Ｊ
本発明者らはかかる実情にＮみ、上記間即点を解決する
べく説！！研究の結果、本発明を完成させたものである
。``Means for solving the eight points in between'' The inventors of the present invention took into consideration the actual situation and completed the present invention as a result of research to solve the above points.
叩ち、本発明の第１は押出ダイにより合成４Ｈ脂フイル
ムを製造するに際し、ダイ押出口に設けた複歓の流路に
熱媒体を選択的に流すことを特徴とするフィルム厚さ制
御方法を、本発明を寞施するための本発明の第２は押出
ダイにより合成１１脂フイルムを製造する装置において
、押出ダイの少なくとも一方のリップに熱媒体の導管を
？１１数１１！設け、各導管に別個に温度制御された熱
媒体を流すか、又は所定の導管にのみ選択的に熱媒体を
流す装置を具備したフィルム厚さｖｉ御装置を、本発明
の第３は押出ダイにより合成樹脂フィルムを製造する装
置において、押出ダイの少なくとも一方のリップに熱媒
体の４管を複数ＩＩ設け、熱媒体を通す導管を予め設定
した順序で且つ所定の時間毎に選択する為のシーケンス
ｗＩｌＩｌ装置をＩＩＩＸ［したフィルム厚さｊ＃ｌ１
ＩＩ装置をそれぞれ内容とするものである。The first aspect of the present invention is a method for controlling film thickness, which is characterized in that when a synthetic 4H resin film is produced using an extrusion die, a heating medium is selectively passed through a double channel provided at the extrusion exit of the die. The second aspect of the present invention for carrying out the present invention is an apparatus for producing a synthetic 11 resin film using an extrusion die, in which a conduit for a heat medium is provided in at least one lip of the extrusion die. 11 number 11! The third aspect of the present invention is an extrusion die. In an apparatus for manufacturing a synthetic resin film, a plurality of four heat medium tubes are provided on at least one lip of an extrusion die, and a sequence for selecting the conduit through which the heat medium passes in a preset order and at predetermined intervals. The film thickness j#l1
II device.
本発明に云う押出フィルムは、平面ダイ又は円形ダイで
押出して作る合成普射脂フィルムで、合成樹脂の種類と
しては、一般に溶液流延法に好適とされるアセテート、
トリアセテート、ポリ塩化ビニル、ポリビニルアルコー
ル、ポリカーボネート、ポリイミド等が含まれ、また熔
融押出法に好適とされるポリエチレン、ポリプロピレン
、ポリスチレン、ポリ塩化ビニル、ポリエステル等が含
まれる。The extruded film referred to in the present invention is a synthetic resin film made by extrusion using a flat die or a circular die, and examples of the synthetic resin include acetate, which is generally suitable for solution casting.
These include triacetate, polyvinyl chloride, polyvinyl alcohol, polycarbonate, polyimide, and the like, as well as polyethylene, polypropylene, polystyrene, polyvinyl chloride, polyester, etc., which are suitable for melt extrusion.
本発明を実ｙ６態様を示す図面に基づいて説明する。The present invention will be explained based on drawings showing a practical embodiment.
第１図において、押出フラットダイのリップ（１ａ）
（１ｂ）の中のリップ（１ｂ）に？Ｒ（２）を刻役し
、１１ｓ（２）に熱媒体用導管（３）を埋設しである。In Figure 1, the lip (1a) of the extrusion flat die
On the lip (1b) inside (1b)? R(2) is carved, and a heat medium conduit (3) is buried in 11s(2).
（４）は押出口である。(4) is an extrusion port.
第２図は、第１図に示した押出フラットダイを用いて、
フィルムの中方向の厚み分布を制御するシステムの一例
を示すもので、ｌ！Ｓ媒体はヒーター（６）と温！ｔｓ
ｍ器（７）で温度制御され、熱媒体ｔｌｚ ＩＪ２ポン
プ（５）と電磁弁口Ｏ）とシーケンサ−（９）でダイ
（１）のリップ（ｌｂ）に設けられた導管（３）の所定
の位置に供給される。ｔｌｌｌ出されたフィルム（１１
）はキャストドラム（８）、乾燥轟（Ｉ２）を経て巻物
（１３）とされる。Figure 2 shows that using the extrusion flat die shown in Figure 1,
This shows an example of a system for controlling the thickness distribution in the middle direction of a film. S medium is heater (6) and temperature! ts
The temperature is controlled by the heat transfer device (7), and the die is controlled by the heat medium tlz IJ2 pump (5), solenoid valve port O) and sequencer (9).
It is supplied to a predetermined position of a conduit (3) provided in the lip (lb) of (1). tllll released film (11
) is made into a scroll (13) through a cast drum (8) and a dryer (I2).
熱媒体の温度は、押出ダイの１度、熱媒体の導管から押
出される液までの寸法、ｊｊＩ節が必要な寸法量と押出
されるフィルムの厚さ、厚さｍ節の目的、押出される液
の粘度の塩度依存性等によって適宜決定されるべきであ
る。押出ダイの温度が一１５〜＋４０℃程度の比較的低
い温度の場合はより高温の機を流し、４０℃程度以上の
高温の場合はより低温の液が選択される。ダイとの温度
差は前記のＩＪｉＩ素を考慮して選択されるが、３０℃
〜７０℃が實用上好ましい。The temperature of the heating medium is determined by the temperature of the extrusion die, the dimension from the heating medium conduit to the extruded liquid, the required size of the I section, the thickness of the extruded film, the purpose of the thickness section M, and the extruded temperature. It should be determined appropriately depending on the salinity dependence of the viscosity of the liquid. When the temperature of the extrusion die is relatively low, about 115 to +40°C, a higher temperature liquid is used, and when the extrusion die temperature is about 40°C or higher, a lower temperature liquid is selected. The temperature difference with the die is selected taking into consideration the above-mentioned IJiI element, but it is 30°C.
-70°C is practically preferred.
ダイ温度が低い場合の例としては、溶液流延法の樹脂、
即ちアセテート、トリアセテート、ポリ塩化ビニル、ポ
リビニルアルコール、ポリカーボネート、ポリイミド等
がある。ダイ温度が高い場合の例としては、溶融押出法
の樹脂、部ちポリエチレン、ポリプロピレン、ポリスチ
レン、ポリ塩化ビニル、ポリエステル等がある。Examples of low die temperatures include solution casting resins,
Namely, there are acetate, triacetate, polyvinyl chloride, polyvinyl alcohol, polycarbonate, polyimide and the like. Examples of high die temperatures include resins produced by melt extrusion, such as polyethylene, polypropylene, polystyrene, polyvinyl chloride, and polyester.
本発明において、熱媒体を流す導管の位置は、第１図に
示すように、ダイの押出口に近い位置に設計される。こ
の押出口から導管までの寸法が小さ過ぎると、溝加工の
際にダイに歪を与え又、強度が弱くなり、一方、この寸
法が大き過ぎると、押出されるフィルムの厚み制御の効
果が小さくなくなる。−概には規定し鐘いが、概ね２０
〜１０９ｗが好ましい、尚、導管は押出ダイのリップ（
ｌ ａ＞ （１ｂ）の両方に設けてもよいことは勿論
である。In the present invention, the position of the conduit through which the heat medium flows is designed to be close to the extrusion port of the die, as shown in FIG. If the dimension from this extrusion port to the conduit is too small, it will cause distortion to the die during groove processing and the strength will be weakened. On the other hand, if this dimension is too large, the effect of controlling the thickness of the extruded film will be small. It disappears. - In general, there are regulations, but it is generally 20
~109w is preferable, and the conduit is connected to the lip of the extrusion die (
Of course, it may be provided in both of la> (1b).
第３図及び第４図は、本発明の他の実施態様を示し、押
出ダイのリップ（ｌｂ）に刻設した溝（２）に、二重管
タイプの導管（３）を配設しである。Figures 3 and 4 show another embodiment of the invention, in which a double tube type conduit (3) is arranged in a groove (2) cut in the lip (lb) of the extrusion die. be.
第５図及び第６図は、本発明の更に別の実施態様を示し
、押出ダイのリップ（ｌｂ）に孔（１４）を設け、該孔
（１４）に二重管タイプの導管（３）を装着しである。Figures 5 and 6 show yet another embodiment of the invention, in which the lip (lb) of the extrusion die is provided with a hole (14), into which a double tube type conduit (3) is provided. It is equipped with.
「実施例」
以下、本発明を実施例を挙げて更に詳細に説明するが、
本発明はこれらにより何ら制限されるものではない。"Examples" The present invention will be explained in more detail by way of Examples below.
The present invention is not limited to these in any way.
実施例
中１７００ｍｍのフラットダイに外ｉ４８ ａｓ、内径
６ｍｌの鋼管１２個をダイのリップに溝を設けて第１図
のように、中方向に分布するように埋め込んだ、ｆＩ管
と押出口との最短距離は７０鶴とした。In this example, 12 steel pipes with an outer diameter of 48 AS and an inner diameter of 6 ml were embedded in a 1700 mm flat die so that grooves were provided in the lip of the die so that they were distributed in the middle direction as shown in Fig. 1. The shortest distance was set at 70 cranes.
ダイには、ピロメリット酸二無水物とジアミノジフェニ
ルエーテルから製造したポリイミド前駆体溶液と、無水
酢酸とβピコリンとからなる硬化剤を混合した樹脂溶液
を供給した。ダイは一５℃に温度調節し、鋼管には４０
℃に温度調節した熱媒体を２０１ ／ｗｉｎの流量で流
した。A resin solution containing a polyimide precursor solution prepared from pyromellitic dianhydride and diaminodiphenyl ether and a curing agent consisting of acetic anhydride and β-picoline was supplied to the die. The temperature of the die is adjusted to -5℃, and the temperature of the steel pipe is 40℃.
A heat medium whose temperature was adjusted to 0.degree. C. was flowed at a flow rate of 201/win.
上記樹脂溶液は濃度１０％に調整し、フィルムの生産速
度を８ｍ／ｍｉｌに設定して、２５７７ ｍ厚のフィル
ムを製造した。熱媒体はフィルムが２００ｍ生産される
毎に、予め設定した順序と位置に流した。得られたフィ
ルムはコブのない綺麗なものであった。このフィルムの
厚みを測定したところ、鋼管に熱媒体を流した部分は、
他の部分に比べ約０．５μｍ厚かった。しかし、０．５
μｍｒｇ、い部分が２００ｍ毎に移動していたので、巻
物にしたフィルムにコブは見られなかった。The concentration of the resin solution was adjusted to 10%, and the film production rate was set to 8 m/mil to produce a film with a thickness of 2577 m. The heating medium was flowed in a predetermined order and position every 200 m of film produced. The obtained film was clean and free of bumps. When we measured the thickness of this film, we found that the part where the heat medium was poured into the steel pipe was
It was about 0.5 μm thicker than other parts. However, 0.5
Since the μmrg portion moved every 200 m, no bumps were observed on the rolled film.
比較例
実施例において、熱媒体を流さない他は同様にしてフィ
ルムを製造した。Comparative Example A film was produced in the same manner as in the example except that the heat medium was not passed.
得られたフィルムは厚みの片寄りのあるコブ（周囲より
０．５〜１μｍ厚い）が認められた。そして、０．５〜
１μｍ厚い部分が巻物状のフィルムのコブの部分に連続
的且つ持続的に続いており、巻物状態からフィルムを展
開した際に、コブが出来ていた部分にシワの発生が見ら
れ、フィルムとしての製品価値の低いものであった。The resulting film had uneven thickness (0.5 to 1 μm thicker than the surrounding area). And 0.5~
The 1 μm thick part continued continuously and persistently to the bumpy part of the roll-shaped film, and when the film was unfolded from the roll, wrinkles were observed in the part where the bump had been formed, and the film was not as good as the film. The product value was low.
「作用・効果」
本発明によれば、危険物のガス雰囲気下でも安全に、又
周囲をクリーン且つ小さなスペースで押出フィルムの巾
方向の厚さ分布を調節することが出来る。又、耳端部を
余分に設ける必要もなく、従って製品の収率を下げるこ
ともなく、更にダイ内に樹脂の滞留部分を生じさせるこ
ともなく、綺′ 麗なフィルムを得ることが出来る。"Operations and Effects" According to the present invention, the thickness distribution in the width direction of the extruded film can be adjusted safely even in a hazardous gas atmosphere, and in a clean surrounding environment and in a small space. In addition, there is no need to provide an extra edge portion, and therefore a clean film can be obtained without lowering the yield of the product and without creating a portion where the resin remains in the die.
第１図は本発明装置の実施態様を示す概要図、第２図は
第１図の装置を組み込んだ制御ンステムの一例を示す概
要図、第３図及び第４図は、いずれも本発明装置の他の
実施態様を示す概要図、第５図及び第６図は、いずれも
本発明の更に他の実施態様を示す概要図である。
１・・・ダイ、 ｌａ、ｌｂ・・・リップ２・・・
溝、 ３・・・熱媒体用導管４・・・押出口
５・・・ｊ盾環ポンプ６・・・ヒーター ７・・・
温度調節器８・・・キャストドラムFig. 1 is a schematic diagram showing an embodiment of the device of the present invention, Fig. 2 is a schematic diagram showing an example of a control system incorporating the device of Fig. 1, and Figs. FIGS. 5 and 6 are schematic diagrams showing still other embodiments of the present invention. 1... die, la, lb... lip 2...
Groove, 3... Heat medium conduit 4... Extrusion port
5...j shield ring pump 6... heater 7...
Temperature regulator 8...cast drum
Claims (1)
、ダイ押出口に設けた複数の流路に熱媒体を選択的に流
すことを特徴とするフィルム厚さ制御方法。 ２、押出ダイにより合成樹脂フィルムを製造する装置に
おいて、押出ダイの少なくとも一方のリップに熱媒体の
導管を複数個設け、各導管に別個に温度制御された熱媒
体を流すか、又は所定の導管にのみ選択的に熱媒体を流
す装置を具備したフィルム厚さ制御装置。 ３、押出ダイにより合成樹脂フィルムを製造する装置に
おいて、押出ダイの少なくとも一方のリップに熱媒体の
導管を複数個設け、熱媒体を通す導管を予め設定した順
序で且つ所定の時間毎に選択する為のシーケンス制御装
置を具備したフィルム厚さ制御装置。[Scope of Claims] 1. A method for controlling film thickness, which comprises selectively flowing a heat medium through a plurality of channels provided at an extrusion port of the die when producing a synthetic resin film using an extrusion die. 2. In an apparatus for producing a synthetic resin film using an extrusion die, at least one lip of the extrusion die is provided with a plurality of heat medium conduits, and a heat medium whose temperature is controlled separately is allowed to flow through each conduit, or a predetermined conduit is used. A film thickness control device equipped with a device that selectively flows a heat medium only to the film thickness. 3. In an apparatus for producing a synthetic resin film using an extrusion die, a plurality of heat medium conduits are provided on at least one lip of the extrusion die, and the conduits through which the heat medium is passed are selected in a preset order and at predetermined intervals. A film thickness control device equipped with a sequence control device for
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62016623A JPH0764007B2 (en) | 1987-01-27 | 1987-01-27 | Method and apparatus for controlling film thickness in extrusion die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62016623A JPH0764007B2 (en) | 1987-01-27 | 1987-01-27 | Method and apparatus for controlling film thickness in extrusion die |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63183826A true JPS63183826A (en) | 1988-07-29 |
| JPH0764007B2 JPH0764007B2 (en) | 1995-07-12 |
Family
ID=11921471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62016623A Expired - Fee Related JPH0764007B2 (en) | 1987-01-27 | 1987-01-27 | Method and apparatus for controlling film thickness in extrusion die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0764007B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5229140A (en) * | 1991-03-27 | 1993-07-20 | Hoechst Aktiengesellschaft | Device for smoothing out the thickness of a sheet |
| US5462423A (en) * | 1993-04-13 | 1995-10-31 | Sencorp Systems, Inc. | Apparatus for non-mechanical die lip temperature adjustment in an extruder |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5171361A (en) * | 1974-12-18 | 1976-06-21 | Teijin Ltd | Jugotaifuirumuno seizohoho |
-
1987
- 1987-01-27 JP JP62016623A patent/JPH0764007B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5171361A (en) * | 1974-12-18 | 1976-06-21 | Teijin Ltd | Jugotaifuirumuno seizohoho |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5229140A (en) * | 1991-03-27 | 1993-07-20 | Hoechst Aktiengesellschaft | Device for smoothing out the thickness of a sheet |
| US5462423A (en) * | 1993-04-13 | 1995-10-31 | Sencorp Systems, Inc. | Apparatus for non-mechanical die lip temperature adjustment in an extruder |
| US5567369A (en) * | 1993-04-13 | 1996-10-22 | Sencorp Systems, Inc. | Method for die lip temperature adjustment in a thermoplastic extruder |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0764007B2 (en) | 1995-07-12 |
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