JP2681716B2 - Static mixing means - Google Patents
Static mixing meansInfo
- Publication number
- JP2681716B2 JP2681716B2 JP3142739A JP14273991A JP2681716B2 JP 2681716 B2 JP2681716 B2 JP 2681716B2 JP 3142739 A JP3142739 A JP 3142739A JP 14273991 A JP14273991 A JP 14273991A JP 2681716 B2 JP2681716 B2 JP 2681716B2
- Authority
- JP
- Japan
- Prior art keywords
- plate
- mixing means
- static mixing
- shaped
- twisting element
- 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 - Lifetime
Links
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は静止混合手段、特にプラ
スチックフィルムの成膜加工に使用されるものに関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to static mixing means, especially those used for forming plastic films.
【０００２】[0002]
【従来の技術・課題】プラスチックフィルムの成膜加工
として、プラスチックを熱で溶融し所定のダイから押出
して成形する溶融押出法（Ｔダイ法やインフレーション
法）がある。しかし、スリット状ノズルに至るまでのダ
イ内の流路において、溶融樹脂が層状に或いは偏って流
れ、フィルムにシワが発生したり厚みが不均一になる場
合がある。2. Description of the Related Art As a film forming process of a plastic film, there is a melt extrusion method (T die method or inflation method) in which plastic is melted by heat and extruded from a predetermined die to be molded. However, in the flow path in the die up to the slit-shaped nozzle, the molten resin may flow in a layered manner or unevenly, causing wrinkles in the film and making the thickness uneven.
【０００３】そのため、スリット状ノズルに至るまでの
ダイ内の流路に静止混合手段を配置することにより、溶
融樹脂を混合して均一に流し、フィルムのシワ発生や厚
みの不均一化を防止することが行われている（実公昭６
１−２１２１６）。しかし、このように静止混合手段を
配置したものにあっても、最終製品としてのフィルムに
シワ等に至らないまでも筋状の根跡（フローマーク、ウ
ェルドラィン等）が残ってしまうことがある。このフロ
ーマーク等の存在は、例えば、透明プラスチックフィル
ムを人形ケースとして使用した場合、人形が歪んで見え
るというような問題を生ずる。Therefore, by disposing static mixing means in the flow path in the die up to the slit-shaped nozzle, the molten resin is mixed and flowed uniformly to prevent wrinkles and uneven thickness of the film. Is being carried out
1-212116). However, even when the static mixing means is arranged in this way, streak-like traces (flow marks, weld lines, etc.) may remain on the film as the final product, even if wrinkles do not occur. . The presence of the flow marks causes a problem that the doll looks distorted when a transparent plastic film is used as a doll case.
【０００４】[0004]
【課題の解決手段・作用】本発明者等は、上記フローマ
ーク等の発生原因について詳細に検討した結果、静止混
合手段の捻り要素による溶融樹脂の流れの捻りに基づく
ことを見い出し、本発明に到達したものである。即ち、
本発明の静止混合手段は、捻り要素のうち少なくとも軸
方向端部に位置する捻り要素が、この端縁に延在させて
板状整流部を備え、板状整流部の端部が、その幅全域に
亘り端縁に向かうにつれて徐々にかつ両面側より均等に
肉薄とされていることを特徴とする。より詳細には以下
の静止混合手段である。 右捻り要素と左捻り要素とを軸方向に交互にかつ隣接
する要素の端部を交叉させて配置してなり、少なくとも
軸方向端部に位置する捻り要素が、その端縁に延在させ
て板状整流部を備え、板状整流部の端部が、その幅全域
に亘り端縁に向かうにつれて徐々にかつ両面側より均等
に肉薄とされている静止混合手段。 右捻り要素と左捻り要素とを軸方向に交互にかつ隣接
する要素の端部を交叉させて配置してなり、各捻り要素
が、その軸方向同一側端縁に延在させて板状整流部を備
え、板状整流部の端部が、その幅全域に亘り端縁に向か
うにつれて徐々にかつ両面側より均等に肉薄とされてい
る静止混合手段。 板状整流部の軸方向長さが幅と略同一又はそれ以上で
ある上記又はの静止混合手段。 溶融押出法によってフィルムを製造するときダイ内の
溶融樹脂の流路に配置され、板状整流部の幅方向とフィ
ルムの延伸方向とが略平行となっている上記又はの
静止混合手段。 Means for Solving the Problems The inventors of the present invention have made a detailed study on the cause of generation of the flow marks and the like, and as a result, have found that they are based on the twist of the flow of molten resin by the twist element of the static mixing means, It has arrived. That is,
In the static mixing means of the present invention, the twisting element located at least at the end in the axial direction of the twisting element is provided with a plate-shaped straightening portion extending to the edge, and the end of the plate-shaped straightening portion has a width thereof. All over
Gradually toward the edge and evenly from both sides
It is characterized by being thin . More specifically below
It is a static mixing means. The right twist element and the left twist element are alternately and adjacent in the axial direction.
The elements to be crossed are arranged at least, and at least
The twisting element located at the axial end extends on its edge.
And a plate-shaped straightening unit, and the end of the plate-shaped straightening unit is
Gradually and evenly from both sides toward the edge
A static mixing means that is thin. The right twist element and the left twist element are alternately and adjacent in the axial direction.
Each twist element is made by arranging the ends of the elements
However, it has a plate-shaped straightening unit that extends on the same side edge in the axial direction.
However, the edge of the plate-shaped straightening section should face the edge over the entire width.
It is gradually thinned and gradually thinned from both sides
Static mixing means. If the axial length of the plate-shaped straightening unit is approximately the same as or greater than the width,
A static mixing means as above. In the die when producing films by the melt extrusion method
It is placed in the flow path of the molten resin, and the width direction of the plate rectification
The above or
Static mixing means.
【０００５】捻り要素の端縁に延在させて備えられた板
状整流部によって、捻り要素の捻りに基づく溶融樹脂の
旋回流を整流できる。The plate-shaped straightening portion provided at the end of the twisting element can straighten the swirling flow of the molten resin based on the twisting of the twisting element.
【０００６】[0006]
【実施例】図１に静止混合手段の第一実施例を示す。こ
の静止混合手段は、通常のいわゆるスタティックミキサ
（図３参照）と基本的構造は同じである。即ち、捻り角
度１８０゜を有する右捻り要素１と左捻り要素１とを軸
方向に交互にかつ隣接する要素の端部を接続角度９０゜
をもって交叉させて連続してなる。本例では、この基本
的構造に加えて、その軸方向端部（一側のみ）に位置す
る右捻り要素１が、捻り本体部１１と共に、その端縁に
延在させて板状整流部１２を備えている。この板状整流
部１２は、軸方向長さ（１）と幅（ｄ）とが略同一であ
り、その肉厚は捻り本体部１１の肉厚と同一とされてい
る。但し、板状整流部１２の軸方向端部については、そ
の幅全域に亘り軸方向端縁に向かうにつれて徐々にかつ
両面側より均等に肉薄とされ、幅全域において直線的に
軸方向に向けて尖った状態となっている（図１Ａ）。図
１Ａにおいて、点線は尖らせる加工前の状態を示してい
る。２は板状整流部１２にろう付け等によって接合され
るフランジである。本例にあっては、板状整流部１２の
存在によって旋回流を整流できると共に、板状整流部１
２の軸方向端部が両面側より均等に肉薄とされた直線的
な尖状態となっているので、軸方向端部に位置する右捻
り要素１によって分割されている溶融樹脂がスムーズに
合流でき、より一層整流作用を有効に発揮できる。更
に、フランジ２の内壁に板状整流部１２を接合した後の
表面のバフ仕上げも容易である。EXAMPLE FIG. 1 shows a first example of the static mixing means. This static mixing means has the same basic structure as a normal so-called static mixer (see FIG. 3). That is, the right twisting element 1 and the left twisting element 1 having a twisting angle of 180 ° are alternately arranged in the axial direction and the ends of the adjacent elements are crossed at a connection angle of 90 ° so as to be continuous. In this example, in addition to this basic structure, the right twisting element 1 located at the axial end portion (only one side) is extended along with the twisting main body portion 11 to the edge thereof and the plate-shaped straightening portion 12 is provided. Is equipped with. The plate-shaped straightening portion 12 has an axial length (1) and a width (d) that are substantially the same, and the wall thickness thereof is the same as that of the twist main body portion 11. However, the axial end portion of the plate-shaped straightening portion 12 is gradually and evenly thinned from both surface sides toward the axial end edge over the entire width, and linearly extends in the axial direction over the entire width. It is sharp (Fig. 1A). In FIG. 1A, the dotted line shows the state before the sharpening process. Reference numeral 2 is a flange joined to the plate-shaped straightening unit 12 by brazing or the like. In this example, the swirling flow can be straightened by the existence of the plate-shaped straightening unit 12, and the plate-shaped straightening unit 1 can be used.
Since the axial end portion of 2 has a linear pointed state in which the thickness is evenly thinned from both sides, the molten resin divided by the right twisting element 1 located at the axial end portion can smoothly join. Further, the rectifying action can be more effectively exhibited. Further, the buffing of the surface after the plate-shaped straightening portion 12 is joined to the inner wall of the flange 2 is easy.
【０００７】尚、従来の一般的なスタティックミキサに
あっても軸方向端部に位置する捻り要素１の端部を幅全
域に亘って尖状態したものもある（図３Ａ）。しかし、
捻り要素のように捻られた状態のものを両面側から均等
に削ることは極めて困難である上、尖状態ではあるもの
の捻りに基づき、溶融樹脂が合流するとき乱れた界面と
なり、ウェルドラィンを形成し易いものである。Even in the conventional general static mixer, there is a conventional static mixer in which the end of the twisting element 1 located at the end in the axial direction is sharpened over the entire width (FIG. 3A). But,
It is extremely difficult to evenly scrape a twisted element such as a twisting element from both sides, and even though it is a pointed element, it becomes a disordered interface when molten resin merges due to twisting, forming a weld line. It is easy to do.
【０００８】図２は静止混合手段の第二実施例を示す。
本例においては、軸方向端部に位置する捻り要素１だけ
でなく、全ての捻り要素１…について、その軸方向同一
側端縁に延在させて板状整流部１２…を備えた構成とし
たものである。これによって各捻り要素１…についての
旋回流を、直後に位置する各板状整流部１２…によって
整流できることになる。但し、捻り要素１…のうち軸方
向端部（一側のみ）に位置するもの以外の捻り要素１…
に備えられた板状整流部１２…は、その軸方向長さ
（ｌ）を幅（ｄ）より短くし、本来の混合作用をあまり
阻害しないようにしている。FIG. 2 shows a second embodiment of the static mixing means.
In this example, not only the twisting element 1 located at the end in the axial direction, but also all the twisting elements 1 ... It was done. As a result, the swirling flow for each of the twisting elements 1 ... Can be rectified by the plate-shaped rectifying portions 12 ... However, the twisting elements 1 other than those located at the axial end (only one side) of the twisting elements 1 ...
The plate-shaped straightening portions 12 provided in the above are configured so that the axial length (l) thereof is shorter than the width (d) so that the original mixing action is not significantly hindered.
【０００９】又、軸方向端部（一側のみ）に位置する捻
り要素１が板状整流部１２を備えている限り、他の捻り
要素１…の一部に板状整流部１２…を備えてもよい。As long as the twisting element 1 located at the axial end (only one side) is provided with the plate-like straightening portion 12, the other twisting elements 1 are provided with the plate-like straightening portion 12 ... May be.
【００１０】軸方向端部に位置する捻り要素１の板状整
流部１２について、その軸方向長さ（ｌ）は整流作用を
発揮し得る限り特に限定されないが、通常、幅（ｄ）と
略同一か、又はそれ以上にするとよい。The axial length (l) of the plate-shaped straightening portion 12 of the twisting element 1 located at the end in the axial direction is not particularly limited as long as it can exert a straightening action, but is usually approximately the width (d). It may be the same or more.
【００１１】こうした静止混合手段Ａは、典型的には溶
融押出法によってフィルムを製造するときダイ内の溶融
樹脂の流路内に配置して使用する。この場合、静止混合
手段の板状整流部１２の幅方向がフィルムの延伸方向と
略平行になるように配置することが好ましい。溶融押出
法のうちＴダイ法を例にとれば、溶融樹脂が吐出される
スリット状ノズルのスリットの長手方向と板状整流部１
２の幅方向とが略平行になるようにするとよい。Such static mixing means A is typically used by arranging it in the flow path of the molten resin in the die when producing a film by the melt extrusion method. In this case, it is preferable to arrange the plate-shaped straightening section 12 of the static mixing means so that the width direction thereof is substantially parallel to the stretching direction of the film. Taking the T-die method as an example of the melt extrusion method, the longitudinal direction of the slit of the slit nozzle for discharging the molten resin and the plate-shaped straightening unit 1
It is preferable that the width direction of 2 is substantially parallel.
【００１２】これによって、ウェルドラィンの発生がよ
り一層確実に防止できる。即ち、軸方向端部に位置する
捻り要素１の板状整流部１２において整流された後、分
割流体としての溶融樹脂は合流するのであるが、その合
流による幅方向の界面に対応して、フィルムに筋状の根
跡（ウェルドラィン）が発生するおそれがある。しか
し、板状整流部１２の幅方向、従って溶融樹脂の合流界
面が、フィルムの延伸方向と略平行であれば、溶融樹脂
の合流界面はフィルムの厚みの中に吸収されていくの
で、フィルム面全体については均質であり、結果として
ウェルドラィンが残るのを極力防止できる。This makes it possible to prevent the generation of weld lines more reliably. That is, after being rectified by the plate-shaped rectifying portion 12 of the twisting element 1 located at the end in the axial direction, the molten resins as divided fluids merge, and the film is formed corresponding to the interface in the width direction due to the merging. There is a possibility that streak-like root marks (weldrain) may occur on the. However, if the width direction of the plate-shaped straightening section 12, that is, the confluent interface of the molten resin is substantially parallel to the stretching direction of the film, the confluent interface of the molten resin is absorbed in the thickness of the film. The whole is homogeneous, and as a result, it is possible to prevent the welder line from remaining as much as possible.
【００１３】尚、各捻り要素（の捻り本体部）の軸方向
長さ（Ｌ）の幅（Ｄ）に対する比（Ｌ／Ｄ）、又その材
質などは、通常のスタティックミキサにおけると同様に
してよい。捻り要素の数についても用途に応じて適宜選
択してよい。The ratio (L / D) of the axial length (L) to the width (D) of each of the twisting elements (of the twisting main body) and the material thereof are the same as in a normal static mixer. Good. The number of twisting elements may also be appropriately selected according to the application.
【００１４】[0014]
【効果】静止混合手段の旋回流あるいは混合手段出口の
樹脂の合流部に基づくフィルム欠陥としてのウェルドラ
ィンの発生を、板状整流部の整流作用により防止でき
る。[Effect] It is possible to prevent the generation of the weld line as a film defect due to the swirling flow of the static mixing means or the merging portion of the resin at the exit of the mixing means by the rectifying action of the plate-like rectifying portion.
【図１】本発明の静止混合手段の第一実施例を示す側面
図FIG. 1 is a side view showing a first embodiment of a static mixing means of the present invention.
【図１Ａ】図１の板状整流部の端部を拡大して示す平面
図FIG. 1A is a plan view showing an enlarged end portion of the plate-shaped rectifying portion of FIG.
【図２】本発明の静止混合手段の第二実施例を示す側面
図FIG. 2 is a side view showing a second embodiment of the static mixing means of the present invention.
【図３】従来の静止混合手段を示す側面図FIG. 3 is a side view showing a conventional static mixing means.
【図３Ａ】図３の軸方向端部に位置する捻り要素の端部
を拡大して示す平面図FIG. 3A is an enlarged plan view showing an end portion of a torsion element located at an axial end portion of FIG. 3;
１…捻り要素 12…板状整流部 1 ... Twisting element 12 ... Plate rectifying section
───────────────────────────────────────────────────── フロントページの続き (72)発明者 大久保 司直 愛知県名古屋市名東区つつじが丘301番 地21−108 (56)参考文献 特開 昭49−24257（ＪＰ，Ａ) 実公 昭61−21216（ＪＰ，Ｙ２) ─────────────────────────────────────────────────── ─── Continuation of front page (72) Inventor Tsukasa Okubo 21-108, Tsutsujigaoka, Meito-ku, Nagoya, Aichi 21-108 (56) References JP-A-49-24257 (JP, A) Jitsuko Sho 61-21216 ( JP, Y2)
Claims (4)
にかつ隣接する要素の端部を交叉させて配置してなり、 少なくとも軸方向端部に位置する捻り要素が、その端縁
に延在させて板状整流部を備え、 板状整流部の端部が、その幅全域に亘り端縁に向かうに
つれて徐々にかつ両面側より均等に肉薄とされ ているこ
とを特徴とする静止混合手段。1. A right-handed twisting element and a left-handed twisting element are arranged alternately in the axial direction and the ends of adjacent elements are crossed, and the twisting element located at least at the end in the axial direction has its edge. extend to comprise a plate-shaped rectifier, the ends of the plate-shaped rectifier is, toward the over edges on its entire width
A static mixing means characterized in that the thickness is gradually reduced and evenly reduced from both sides .
にかつ隣接する要素の端部を交叉させて配置してなり、 各捻り要素が、その軸方向同一側端縁に延在させて板状
整流部を備え、 板状整流部の端部が、その幅全域に亘り端縁に向かうに
つれて徐々にかつ両面側より均等に肉薄とされ ているこ
とを特徴とする静止混合手段。2. A right-handed twisting element and a left-handed twisting element are arranged alternately in the axial direction and the ends of adjacent elements are crossed, and each twisting element extends on the same side edge in the axial direction. The plate-shaped straightening unit is provided so that the end of the plate-shaped straightening unit extends toward the edge over the entire width thereof.
A static mixing means characterized in that the thickness is gradually reduced and evenly reduced from both sides .
それ以上であることを特徴とする請求項１又は２記載の
静止混合手段。 3. The axial length of the plate-shaped straightening portion is substantially the same as the width or
It is more than that, The claim 1 or 2 characterized by the above-mentioned.
Static mixing means.
きダイ内の溶融樹脂の流路に配置され、板状整流部の幅
方向とフィルムの延伸方向とが略平行となっていること
を特徴とする請求項１又は２記載の静止混合手段。 4. When a film is produced by a melt extrusion method
The width of the plate-shaped rectifying section, which is placed in the molten resin flow path inside the die
And the stretching direction of the film are almost parallel
The static mixing means according to claim 1 or 2, wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3142739A JP2681716B2 (en) | 1991-05-20 | 1991-05-20 | Static mixing means |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3142739A JP2681716B2 (en) | 1991-05-20 | 1991-05-20 | Static mixing means |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05317673A JPH05317673A (en) | 1993-12-03 |
| JP2681716B2 true JP2681716B2 (en) | 1997-11-26 |
Family
ID=15322456
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3142739A Expired - Lifetime JP2681716B2 (en) | 1991-05-20 | 1991-05-20 | Static mixing means |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2681716B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008080577A (en) * | 2006-09-26 | 2008-04-10 | Fujifilm Corp | Method and apparatus for manufacturing cellulose resin film and optical cellulose resin film |
| JP2017185760A (en) * | 2016-04-08 | 2017-10-12 | 株式会社クラレ | Manufacturing method of (meth)acrylic film |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4924257A (en) * | 1972-06-21 | 1974-03-04 | ||
| JPS6121216A (en) * | 1984-07-10 | 1986-01-29 | Bridgestone Corp | Flexible membrane weir |
-
1991
- 1991-05-20 JP JP3142739A patent/JP2681716B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05317673A (en) | 1993-12-03 |
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