JPH0116596Y2 - - Google Patents
Info
- Publication number
- JPH0116596Y2 JPH0116596Y2 JP1982110718U JP11071882U JPH0116596Y2 JP H0116596 Y2 JPH0116596 Y2 JP H0116596Y2 JP 1982110718 U JP1982110718 U JP 1982110718U JP 11071882 U JP11071882 U JP 11071882U JP H0116596 Y2 JPH0116596 Y2 JP H0116596Y2
- Authority
- JP
- Japan
- Prior art keywords
- air
- ring
- tubular film
- tube
- regulating tube
- 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
- 230000001105 regulatory effect Effects 0.000 claims description 34
- 238000001816 cooling Methods 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 13
- 238000004378 air conditioning Methods 0.000 claims description 4
- 230000000694 effects Effects 0.000 description 6
- 238000000137 annealing Methods 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 229920005672 polyolefin resin Polymers 0.000 description 1
- 230000002250 progressing effect Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Description
【考案の詳細な説明】
本考案は管状フイルムの冷却装置に関し、特に
は、ポリオレフイン樹脂などの熱可塑性樹脂をイ
ンフレーシヨン法でフイルムに成形するにあた
り、得られるフイルムの諸物性を低下させること
なく、透明性を改善することの可能な管状フイル
ムの冷却装置に関する。[Detailed description of the invention] The present invention relates to a cooling device for tubular films, and in particular, it is used to mold thermoplastic resins such as polyolefin resins into films by the inflation method without reducing the physical properties of the resulting film. , relates to a tubular film cooling device capable of improving transparency.
インフレーシヨン法による管状フイルムの透明
性の改善方法としては、たとえば、管状フイルム
をダイスから押出したのち、保温ないし加熱をす
る煙突または加熱シリンダを設ける方法が提案さ
れているが（特公昭37−12525号公報、特公昭38
−24593号公報）、この方法において、現在慣用さ
れているエアーリングによる冷却を適用しても透
明性の向上が不十分であり、また、工程の安定性
も悪く生産性も劣り実用に適しない。 As a method for improving the transparency of a tubular film using the inflation method, for example, a method has been proposed in which a chimney or heating cylinder is provided to keep warm or heat the tubular film after extruding it from a die (Japanese Patent Publication No. 1973- Publication No. 12525, Special Publication No. 1973
-24593 Publication), in this method, the improvement in transparency is insufficient even if the currently commonly used cooling using an air ring is applied, and the process stability is poor and productivity is poor, making it unsuitable for practical use. .
特に、現在安価なプラスチツクフイルムとして
一般に広く用いられている高圧ポリエチレンフイ
ルムの場合、ポリプロピレンフイルムに対して透
明性が劣り、価格の点で有利であるにも拘らず進
出できない市場が多い。 In particular, high-pressure polyethylene film, which is currently widely used as an inexpensive plastic film, is inferior in transparency to polypropylene film, and there are many markets in which it cannot enter even though it is advantageous in terms of price.
本考案者らは先に出願した特願昭55−72587号
において、アニーリングチヤンバと、管状フイル
ム軸に垂直に冷却風を吹きつけるエアーリング
（一般に水平式エアーリングとよばれる）と、エ
アーリングに密接し、且つ、管状フイルムを囲む
整風筒と、エアリングの上側プレートリングから
整風筒内にフイルムの進行方向に向けて吹き出す
副冷却風との組合せによつて、透明性に優れたイ
ンフレーシヨンフイルムを得ることができること
を報告した。そして、この方法によれば、現在汎
用されているインフレーシヨン法成形機の冷却部
分に僅かな改良を加えるか、あるいは補助的部品
の交換等によつて達成することができ、また、汎
用法に復元することも可能であつた。 The inventors of the present invention previously filed Japanese Patent Application No. 72587/1987, which described an annealing chamber, an air ring that blows cooling air perpendicularly to the axis of a tubular film (generally called a horizontal air ring), and an air ring. The combination of the air conditioning tube that is in close contact with the tube and surrounding the tubular film, and the sub-cooling air that is blown from the upper plate ring of the air ring into the air conditioning tube in the direction of travel of the film, allows for highly transparent inflation. It was reported that it is possible to obtain film. According to this method, it can be achieved by making slight improvements to the cooling part of the currently widely used inflation method molding machine or by replacing auxiliary parts. It was also possible to restore it to
しかしながら、既存の装置の改造をより軽微に
したいか、またはより容易に汎用装置への復元を
希望する成形加工業者や、先願のようにエアーリ
ングの上側プレートリングに孔あきのものを新設
することに抵抗を感じる業者もあつた。 However, molding companies who wish to make minor modifications to existing equipment or wish to restore it to general-purpose equipment more easily, or who wish to install a new perforated upper plate ring of the air ring as in the previous application. Some businesses felt resistance.
また、先願においてはアニーリングチヤンバの
設置が必要であつた。アニーリングチヤンバは、
内部を進行中の管状フイルムを溶融状態に維持
し、その表面張力によつて押出しダイの微少凹凸
を均等化して光沢および透明性を向上させる効果
を有する反面、管状フイルムの冷却部分における
安定性を阻害する要因となる場合も考えられる。
特に、エアーリングの加工精度が低い場合や、エ
アーリングの設置精度が悪い場合にはトラブルと
なる恐れがあつた。 Further, in the prior application, it was necessary to install an annealing chamber. The annealing chamber is
It maintains the tubular film that is progressing inside in a molten state, and uses its surface tension to equalize the minute irregularities of the extrusion die, improving gloss and transparency. There may also be cases where this becomes an inhibiting factor.
In particular, problems may occur if the processing accuracy of the air ring is low or if the air ring is installed with poor accuracy.
本考案は、上記の点に鑑みてなされたものであ
り、現在の汎用機をより簡易に、且つ、復元容易
な方法で改造でき、また、アニーリングチヤンバ
を用いなくても、透明性に優れたインフレーシヨ
ンフイルムを得ることのできる冷却装置について
鋭意検討した結果、
(1) 水平式エアーリング
(2) エアーリングに気密に設置された整風筒、お
よび
(3) 整風筒の内周側に、エアーリングとの間に空
気循環口を残して設けられた副整風筒
を結合することにより、上記目的が達成されるこ
とを見出し、本考案を完成するに至つた。 The present invention was developed in view of the above points, and allows for the modification of current general-purpose machines in a way that is easier and easier to restore, and also provides excellent transparency without using an annealing chamber. As a result of intensive research into cooling devices that can produce blown film, we found that: (1) a horizontal air ring; (2) a wind regulating tube airtightly installed in the air ring; and (3) a cooling device installed on the inner circumference of the wind regulating tube. The inventors have discovered that the above object can be achieved by combining an auxiliary wind regulating tube with an air circulation port left between the air ring and the air ring, and have completed the present invention.
すなわち、本考案の冷却装置はダイを通して管
状に押し出され、内圧により膨張させられる管状
フイルムに、その進行方向に対し垂直に冷却風を
吹きつけるエアーリングと、エアーリングの上側
プレートリングに密接して設置された整風筒を有
するインフレーシヨン法における管状フイルムの
冷却装置において、前記整風筒の内周側で、且
つ、膨張しつつある管状フイルムの外周側近傍
に、前記上側プレートリングとの間に間隙ないし
開口を残して、前記整風筒よりも筒長の短い円筒
状の副整風筒を配設したことを特徴とする。 That is, the cooling device of the present invention includes an air ring that blows cooling air perpendicular to the direction of travel of the tubular film that is extruded into a tubular shape through a die and expanded by internal pressure, and an air ring that is closely connected to the upper plate ring of the air ring. In a tubular film cooling device using an inflation method having a wind regulating tube installed, on the inner peripheral side of the wind regulating tube and near the outer peripheral side of the expanding tubular film, between the upper plate ring and The present invention is characterized in that a cylindrical sub-air regulating tube having a shorter tube length than the air regulating tube is disposed with a gap or opening left.
本考案のように整風筒を用いるインフレーシヨ
ン法における管状フイルムの冷却装置であつて、
エアーリングの下流側で、且つ、整風筒の内側に
円筒状の副整風筒を有する技術は見られない。例
えば実公昭49−117358において一見類似の形態が
見られるが、内側の円筒がエアーリングの上流側
に設置される点で本質的に異なり、その作用効果
も、(1)エアーリングからの冷却風がダイを出た後
の管状フイルムに直接当たるのを防ぐこと、(2)水
平に吹きつける冷却風を上向きに方向を変えさせ
ること、および(3)溶融している管状フイルム附近
の熱せられた空気を僅かに除去することであり、
本考案とは異質の技術である。 A cooling device for a tubular film in an inflation method using a wind regulating tube as in the present invention,
No technology has been found in which a cylindrical sub-air regulating tube is provided downstream of the air ring and inside the air regulating tube. For example, Utility Model Publication No. 49-117358 has a similar form at first glance, but it is essentially different in that the inner cylinder is installed upstream of the air ring, and its effects are also: (1) cooling air from the air ring; (2) to change the direction of horizontally blown cooling air upward; and (3) to prevent heated air near the molten tubular film from directly hitting the tubular film after it exits the die. It is a slight removal of air,
This is a different technology from the present invention.
また、形状自体は相当異なるが、エアーリング
の冷却風吹出口附近に円筒状に近い構造物を設置
する装置は特開昭53−137261号公報および特開昭
53−77258号公報に見られる。しかし、これらは
いずれもエアーリングから出た冷却風を管状フイ
ルムに当てる前に２分割し、一部をダイを出たば
かりの管状フイルムに吹きつけ、この冷却風は円
筒内を上昇し、他の一部の冷却風はベンチユリー
効果によつて円筒内の冷却風を吹き出すと同時に
管状フイルムを冷却することを特色とするもので
あり、本考案とは明らかに区別される。 Although the shape itself is quite different, a device that installs a nearly cylindrical structure near the cooling air outlet of the air ring is disclosed in Japanese Patent Laid-Open No. 53-137261 and Japanese Patent Laid-Open No. 137261.
Seen in Publication No. 53-77258. However, in all of these, the cooling air coming out of the air ring is divided into two parts before it hits the tubular film, and one part is blown onto the tubular film that has just come out of the die. Some cooling air is characterized by blowing out the cooling air in the cylinder and cooling the tubular film at the same time due to the Ventury effect, and is clearly distinguished from the present invention.
以下、添付図面に沿つて本考案をさらに詳細に
説明する。 Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings.
第１図は本考案の使用状態を説明するための概
略縦断面図であり、第２図は整風筒１１および副
整風筒１３付近の平面図である。 FIG. 1 is a schematic vertical sectional view for explaining the usage state of the present invention, and FIG. 2 is a plan view of the vicinity of the wind regulating tube 11 and the sub-air regulating tube 13.
水平式エアーリング１５の上側プレートリング
１７上に、円筒状の整風筒１１がその下端部を上
側プレートリング１７と密接して、管状フイルム
１９の外周面と同心円状に、即ち上側プレートリ
ングの内周面と同心円状に配設されている。整風
筒１１の直径はその内側を通る管状フイルム１９
の最大径部の1.5〜5.5倍が好ましく、また、長さ
は150〜1000mmが好ましい。整風筒１１の内周面
側には同心円状に副整風筒１３が設けられる。副
整風筒１３は整風筒１１の内径よりも小径で、ま
た、その筒長は整風筒１１よりも短かい。副整風
筒１３の直径はその内側を通過する管状フイルム
１９の最大値の1.2〜3.0倍が好ましく、その筒長
は150〜500mmが好ましい。さらに、副整風筒１３
の径は上側プレートリング１７の内周径よりも大
きいか、ないしは大略等しいことが望ましい。副
整風筒１３は上側プレートリング１７との間に間
隙を設けて配設され、この間隙部が空気循環口２
１を形成する。この間隙の大きさは２〜20mmが望
ましい。 A cylindrical wind regulating tube 11 is placed on the upper plate ring 17 of the horizontal air ring 15, with its lower end in close contact with the upper plate ring 17, and concentrically with the outer peripheral surface of the tubular film 19, that is, inside the upper plate ring. It is arranged concentrically with the circumferential surface. The diameter of the wind regulating tube 11 is determined by the tubular film 19 passing inside it.
The length is preferably 1.5 to 5.5 times the maximum diameter of , and the length is preferably 150 to 1000 mm. A sub-air regulating cylinder 13 is provided concentrically on the inner peripheral surface side of the air regulating cylinder 11. The sub wind regulating tube 13 has a smaller diameter than the inner diameter of the wind regulating tube 11, and its length is shorter than that of the wind regulating tube 11. The diameter of the auxiliary air conditioning tube 13 is preferably 1.2 to 3.0 times the maximum value of the tubular film 19 passing inside the tube, and the length of the tube is preferably 150 to 500 mm. Furthermore, the sub-air straightener 13
It is desirable that the diameter of the upper plate ring 17 is larger than or approximately equal to the inner circumferential diameter of the upper plate ring 17. The sub-air regulating tube 13 is arranged with a gap provided between it and the upper plate ring 17, and this gap is the air circulation opening 2.
form 1. The size of this gap is preferably 2 to 20 mm.
エアーリング１５からの冷却風は管状フイルム
１９に垂直に当たり、管状フイルム１９の下流側
に流れる。このとき、管状フイルム１９に当たつ
た冷却風は渦流、乱流を生じやすいが、副整風筒
１３によつてこれが抑制される。その結果、冷却
風を管状フイルムに沿つて走らせることが可能と
なり、冷却効果を高めると共に、管状フイルムの
安定性が向上する。冷却風の一部（比較的低温下
にある外側部分）は、整風筒１１と副整風筒１３
との間から空気循環口２１を通つて循環される。
副整風筒をエアーリングの上側プレートリング上
に密着させた場合には管状フイルムと副整風筒の
間隙を吹き抜ける整流された冷却風のためにベン
チユリー現象を生じ、管状フイルムが膨張し、エ
アーリングや副整風筒と接触する等のトラブルを
生じる。しかるに副整風筒とエアーリングの上側
プレートリングの間に空気循環口を設けると、ベ
ンチユリー現象の解消による管状フイルム製造時
の安定性の向上（すなわち生産性の向上）のみな
らず、ここから吸い込まれた未利用冷却風による
冷却効果の補強という予期せざる効果をも生ずる
事を見出したのである。 The cooling air from the air ring 15 perpendicularly hits the tubular film 19 and flows downstream of the tubular film 19. At this time, the cooling air that hits the tubular film 19 tends to generate vortices and turbulence, but this is suppressed by the sub-air straightener tube 13. As a result, it becomes possible to run the cooling air along the tubular film, thereby increasing the cooling effect and improving the stability of the tubular film. A part of the cooling air (the outer part at a relatively low temperature) is transferred to the wind regulating tube 11 and the sub-air regulating tube 13.
The air is circulated between the air and air through the air circulation port 21.
When the secondary air straightener is placed in close contact with the upper plate ring of the air ring, the rectified cooling air that blows through the gap between the tubular film and the secondary air straightener causes a ventilating phenomenon, causing the tubular film to expand and damage the air ring and the air ring. This may cause problems such as contact with the sub-air straightener. However, by providing an air circulation port between the secondary wind regulating tube and the upper plate ring of the air ring, not only will the stability during tubular film manufacturing be improved by eliminating the ventilating phenomenon (that is, productivity will be improved), but also the air They also found that the unexpected effect of reinforcing the cooling effect with unused cooling air was produced.
以上の説明からも判る通り、上記実施例におい
ては、副整風筒１３と上側プレートリング１７と
の間に、円周方向に連続的な空気循環口２１が設
けられたが、これに限られず、上側プレートリン
グ１７との間に開口部を残して副整風筒１３を配
設し、空気循環口を円周方向に非連続的に設けて
もよい。もちろん、冷却効果が円周方向に不均一
にならないことが必要である。また、上記実施例
においては、腕木２３によつて、副整風筒１３を
整風筒１１に固定したが、その配設方法は特に問
わない。たとえば、副整風筒の端部に脚部を設け
て上側プレートリング１７上に置くか、または固
定してもよく、運転中に移動しないならば任意の
方法を選ぶことができる。 As can be seen from the above description, in the above embodiment, the continuous air circulation port 21 was provided in the circumferential direction between the sub-air regulating tube 13 and the upper plate ring 17, but the invention is not limited to this. The sub-air regulating tube 13 may be disposed with an opening left between it and the upper plate ring 17, and the air circulation ports may be provided discontinuously in the circumferential direction. Of course, it is necessary that the cooling effect is not non-uniform in the circumferential direction. Further, in the above embodiment, the sub wind regulating tube 13 is fixed to the wind regulating tube 11 by the arm 23, but the arrangement method thereof is not particularly limited. For example, legs may be provided at the end of the sub-air straightening tube and placed on the upper plate ring 17, or may be fixed, and any method may be selected as long as it does not move during operation.
以上詳説したように本考案によれば容易に透明
フイルムを得ることができる。特に、高圧ポリエ
チレンフイルムの場合にもその曇り度を2.5付近
に半減させることができ、価格が割高の透明性フ
イルムであるポリプロピレンフイルムに近い透明
度を得ることが可能である。 As explained in detail above, according to the present invention, a transparent film can be easily obtained. In particular, even in the case of high-pressure polyethylene film, the degree of haze can be halved to around 2.5, making it possible to obtain transparency close to that of polypropylene film, which is a relatively expensive transparent film.
第１図は本考案の使用状態を説明するための概
略縦断面図であり、第２図は整風筒および副整風
筒付近の平面図である。
１１……整風筒、１３……副整風筒、１５……
エアーリング、１７……上側プレートリング、１
９……管状フイルム、３１……空気循環口、２３
……腕木、２５……ダイ。
FIG. 1 is a schematic vertical sectional view for explaining the usage state of the present invention, and FIG. 2 is a plan view of the vicinity of the wind regulating tube and the sub-wind regulating tube. 11... Wind regulating tube, 13... Sub-wind regulating tube, 15...
Air ring, 17... Upper plate ring, 1
9...Tubular film, 31...Air circulation port, 23
...Archive, 25...Die.
Claims (1)
張させられる管状フイルムに、その進行方向に対
し垂直に冷却風を吹きつけるエアーリングと、エ
アーリングの上側プレートリングに密接して配置
された整風筒を有するインフレーシヨン法におけ
る管状フイルムの冷却装置において、前記整風筒
の内周側で、且つ、膨張しつつある管状フイルム
の外周側近傍に、前記上側プレートリングとの間
に間隙ないし開口を残して、前記整風筒よりも筒
長の短い円筒状の副整風筒を配設したことを特徴
とする管状フイルムの冷却装置。 An air ring that blows cooling air perpendicular to the direction of travel of the tubular film that is extruded into a tubular shape through a die and expanded by internal pressure, and an air regulating tube that is placed closely to the upper plate ring of the air ring. In the cooling device for a tubular film using the flasion method, a gap or opening is left between the upper plate ring on the inner circumferential side of the air conditioning tube and near the outer circumferential side of the expanding tubular film; A cooling device for a tubular film, characterized in that a cylindrical sub-air regulating tube having a tube length shorter than that of the air regulating tube is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11071882U JPS5915517U (en) | 1982-07-21 | 1982-07-21 | Tubular film cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11071882U JPS5915517U (en) | 1982-07-21 | 1982-07-21 | Tubular film cooling system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5915517U JPS5915517U (en) | 1984-01-30 |
| JPH0116596Y2 true JPH0116596Y2 (en) | 1989-05-16 |
Family
ID=30257374
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11071882U Granted JPS5915517U (en) | 1982-07-21 | 1982-07-21 | Tubular film cooling system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5915517U (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51150575A (en) * | 1975-06-20 | 1976-12-24 | Mitsubishi Chem Ind | Device for forming inflation film |
| JPS538339A (en) * | 1976-07-12 | 1978-01-25 | Hitachi Shipbuilding Eng Co | Means for welding narrow groove |
| JPS57115320A (en) * | 1980-06-30 | 1982-07-17 | Union Carbide Corp | Method and apparatus for cooling film bubble of low strain curing polymer |
-
1982
- 1982-07-21 JP JP11071882U patent/JPS5915517U/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS51150575A (en) * | 1975-06-20 | 1976-12-24 | Mitsubishi Chem Ind | Device for forming inflation film |
| JPS538339A (en) * | 1976-07-12 | 1978-01-25 | Hitachi Shipbuilding Eng Co | Means for welding narrow groove |
| JPS57115320A (en) * | 1980-06-30 | 1982-07-17 | Union Carbide Corp | Method and apparatus for cooling film bubble of low strain curing polymer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5915517U (en) | 1984-01-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2720680A (en) | Methods and machines for producing tubing and sheeting | |
| US2544044A (en) | Apparatus and method for producing gusseted plastic tubing | |
| US2770009A (en) | Tube cooling blower | |
| US3650644A (en) | Apparatus for biaxially stretching thermoplastic tubular film | |
| JPS6026698B2 (en) | Plastic film forming method and device | |
| US3548042A (en) | Method and apparatus for cooling extruded tubing | |
| US3210803A (en) | Plastic tubing extrusion die air ring | |
| JPH01306221A (en) | High-performance cooling method and device for manufacturing biaxially oriented film composed of high and intermediate molecular thermoplastic plastic | |
| US3061940A (en) | Method and apparatus for heat transfer | |
| US5980227A (en) | Apparatus for shaping honeycomb structure | |
| JPH0116596Y2 (en) | ||
| US4176155A (en) | Method and apparatus for making film | |
| US3304352A (en) | Method for the extrusion of tubing | |
| US3061875A (en) | Wind-up method and apparatus | |
| US3296352A (en) | Tubular film manufacture | |
| US3084386A (en) | Extrusion machines and methods for tubing and sheeting | |
| CN212072941U (en) | Cold circulating device in blown film | |
| US5468442A (en) | Apparatus and process for gauging and controlling extruded profiled elements | |
| US3249670A (en) | Plastic tube extrusion process | |
| JPH03189125A (en) | Method for controlling film thickness of tubular film | |
| CN207172715U (en) | A kind of floated air-cooled of 3D printing silk material extruder | |
| JPH0415446Y2 (en) | ||
| US3716320A (en) | Apparatus for producing flat film from thermoplastic material | |
| JPH069836Y2 (en) | Extrusion die cooling device for synthetic resin molding | |
| JPH04358823A (en) | Method and apparatus for manufacture of heat-shrinkable tube |