JPS5874322A - Inflation film molding device - Google Patents

Inflation film molding device

Info

Publication number
JPS5874322A
JPS5874322A JP56174350A JP17435081A JPS5874322A JP S5874322 A JPS5874322 A JP S5874322A JP 56174350 A JP56174350 A JP 56174350A JP 17435081 A JP17435081 A JP 17435081A JP S5874322 A JPS5874322 A JP S5874322A
Authority
JP
Japan
Prior art keywords
air
die
lip
inner lip
outer lip
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
Application number
JP56174350A
Other languages
Japanese (ja)
Other versions
JPH0116655B2 (en
Inventor
Nobushige Iketani
池谷　暢重
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Kasei Corp
Original Assignee
Mitsubishi Kasei Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Kasei Corp filed Critical Mitsubishi Kasei Corp
Priority to JP56174350A priority Critical patent/JPS5874322A/en
Priority to KR8204843A priority patent/KR880001768B1/en
Priority to GB08231002A priority patent/GB2110159B/en
Priority to DE19823240212 priority patent/DE3240212A1/en
Priority to FR8218189A priority patent/FR2515571B1/en
Publication of JPS5874322A publication Critical patent/JPS5874322A/en
Priority to US06/624,791 priority patent/US4505657A/en
Publication of JPH0116655B2 publication Critical patent/JPH0116655B2/ja
Granted legal-status Critical Current

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
    • B29C48/911—Cooling
    • B29C48/9115—Cooling of hollow articles
    • B29C48/912—Cooling of hollow articles of tubular films
    • B29C48/913—Cooling of hollow articles of tubular films externally
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

PURPOSE:To obtain the titled device capable of performing a high speed and high blow molding operation by using low density polyethylene or the like as a material for producing an inflation film. CONSTITUTION:An air blowoff port 5 is formed between an outer lip 3 having a tapered surface and an inner lip 4 and an air intake hole 6 is formed between the inner lip 4 and a die 2. The air intake port 6 is brought under a depressed condition due to a venturi effect resulting from air flowing through an air passage and the existence of a reduced pressure generating cover 7 so that a decompressed zone is produced between the tubular inflation film 10 and the inner lip 4. As a consequence, the diameter of the film 10 is expanded to some degree at the decompressed zone immediately after it is extruded from the die and is further expanded along the tapered surface of the outer lip 3.

Description

【発明の詳細な説明】 本発明はインフレーションフィルム成形装置に係る。詳
しくは、バブルを安定化させ、高速成形、高ブローアツ
プ比を可能とし、厚みむらのないフィルムを高能率に製
造し得るインフレーションフィルム成形装置鏡開するも
のである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a blown film forming apparatus. Specifically, the present invention is a blown film forming apparatus that stabilizes bubbles, enables high-speed molding, high blow-up ratio, and can efficiently produce films with uniform thickness.

従来インフレーション成形、すなわち、円形スリットを
有すやダイから溶融樹脂を筒状に押出し、この筒状体の
内部に空気等の気体を吹き吟んで竺張させ、筒状のフィ
ルムを得ることが行なわれて、−る。　　　　　　　　
　２そして、午やダイから押出された筒状フィルムをダ
イ９近傍ＫＢけられた乎アＴリングによ２′。Conventionally, inflation molding was carried out, in which a molten resin was extruded into a cylindrical shape from a die with a circular slit, and a gas such as air was blown into the cylindrical body to make it stretch, thereby obtaining a cylindrical film. It is, -ru.
2. Then, the cylindrical film extruded from the die is passed through a T-ring near the die 9.

シヲンフ、イ々ム成形装置はバブルを安定化するのがま
だ充分でなく、高速成形、高メ〒−アンプ成形等には使
用し得ない。Symptom molding equipment cannot sufficiently stabilize bubbles, and cannot be used for high-speed molding, high-maintenance molding, etc.

特に密度０．２９以上の高密度ポリエチレンや近年注目
を集めている線状低密度ポリエチレン等の溶融張力の低
い熱可塑性合成樹脂を使用し。In particular, we use thermoplastic synthetic resins with low melt tension, such as high-density polyethylene with a density of 0.29 or higher and linear low-density polyethylene, which has been attracting attention in recent years.

てフィルムインフレーション成形することは大変難かし
かった。It was very difficult to perform film inflation molding.

本発明者は、このような現状に鑑み、−高密度ポリエチ
レンや線状低密度ポリエチレン等を用いて高速成形、高
ブローアツプ成形が行ない得るインフレーションフィル
ム成形装置を提供するべく鋭意検討を行なった結果、エ
アーリングを特殊な構造とすることにより問題を解決し
本発明を完成した。In view of the current situation, the inventors of the present invention have conducted intensive studies to provide a blown film forming apparatus that can perform high-speed molding and high blow-up molding using high-density polyethylene, linear low-density polyethylene, etc. By making the air ring a special structure, the problem was solved and the present invention was completed.

すなわち、本発明の要旨は、円形スリットを有するイン
フレーション成形用ダイと、該ダイの円形スリットを囲
繞するように設けられたエアーリングとからなり、該エ
アーリングの空気吹出口を円形スリットから押出された
筒状フィルムの引取方向に向って拡径されたテーパー面
を有する外側リップと該外側リップよりグイ側に設けら
れた内側リップとの間に形成し、該内側リップとダイと
の間には空気吸引孔を形成しｆｃ−コトｔ’１ＮＩＬト
ｆるインフレーションフィルム成形装置に存する。That is, the gist of the present invention is to include an inflation molding die having a circular slit, and an air ring provided so as to surround the circular slit of the die, and an air outlet of the air ring that is extruded from the circular slit. A groove is formed between an outer lip having a tapered surface whose diameter increases in the direction in which the cylindrical film is taken, and an inner lip provided on the side closer to the outer lip, and between the inner lip and the die. The present invention is a blown film forming apparatus in which air suction holes are formed and air suction holes are formed.

本発明装置に適用し得る熱可塑性合成樹脂としてはポリ
エチレン、ポリプロピレン、エチレン−プロピレン共重
合体、ポリブテン／、エチＬ／７−酢酸ビニル共重合体
等のオレフィン果樹ロン６、ナイロン６−６、ナイロン
４−１０゜ナイロン／１１ナイロン７２等のアミド系樹
脂、ポリ塩化ビニル、ポリ塩化ビニリデン、塩化ビニル
−酢酸ビニル共重合体等の塩化ビニル系樹脂、ポリエチ
レンテレフタレート、ポリブチレンテレフタレート等の
エステル系樹脂等、通常インフレーション成形に用いら
れる熱可塑性合成樹脂が適用し得るが、中でもポリオレ
フィン系樹脂が好適であシ、更に好ましくは高密度ポリ
エチレン、線状低密度ポリエチレン等の溶融張力の低い
ポリエチレンが良く、特に線状低密度ポリエチレンが最
適である。Examples of thermoplastic synthetic resins that can be applied to the device of the present invention include polyethylene, polypropylene, ethylene-propylene copolymer, polybutene/, ethyl-L/7-vinyl acetate copolymer, and other olefins such as olefin fruit 6-6, nylon 6-6, and nylon. Amide resins such as 4-10゜nylon/11 nylon 72, vinyl chloride resins such as polyvinyl chloride, polyvinylidene chloride, vinyl chloride-vinyl acetate copolymer, ester resins such as polyethylene terephthalate, polybutylene terephthalate, etc. Thermoplastic synthetic resins commonly used for inflation molding can be applied, but polyolefin resins are particularly preferred, and polyethylenes with low melt tension such as high-density polyethylene and linear low-density polyethylene are more preferred; Linear low density polyethylene is optimal.

線状低密度ポリエチレンとけ、エチレンと他のα−オレ
フィンとの共重合物であり、従来の高圧法により製造さ
れた低密度ポリエチレン樹脂とは異なる・線状低密度ポ
リエチレンは、例えばエチレンと、他のα−オレフィン
としてブテン、ヘキセン、オクテン、デセン静止の共重
合体であり中低工法高密度ポリエチレン製造に用いられ
るチーグラー型触媒又はフィリップス型触媒を用いて製
造されたものであシ、従来の高密度ポリエチレンを共重
合成分により短い枝分かれ構造とし、密度もこの短鎖枝
分かれを利用して適当に低下させθ、り／〜０．り３９
／ａｔ／ｌ程かれが多い構造のポリエチレンである。Linear low-density polyethylene is a copolymer of ethylene and other α-olefins, and is different from low-density polyethylene resin produced by conventional high-pressure methods. The α-olefin is a copolymer of butene, hexene, octene, and decene. Density Polyethylene is made into a short branched structure by copolymerization components, and the density is also appropriately reduced by utilizing this short chain branching to θ, ri/~0. ri39
/at/l is a polyethylene with a structure in which there are many particles.

以下本発明の装置の一例につき図面を用いて更に詳細に
説明する。An example of the apparatus of the present invention will be explained in more detail below with reference to the drawings.

第７図は本発明の装置の一例を示す縦断面図。FIG. 7 is a longitudinal sectional view showing an example of the device of the present invention.

第一図は第７図に示した装置の一部を拡大して示す縦断
面図、第３図、第９図は本発明６装置の他の一例を示す
縦断面図である。FIG. 1 is an enlarged vertical cross-sectional view of a part of the apparatus shown in FIG. 7, and FIGS. 3 and 9 are vertical cross-sectional views showing other examples of the apparatus according to the present invention.

図中７はエアーリング％コはダイ、３は外側リップ、ダ
は内側リップ、ｊは空気吹出口、６は空気吸引孔、２は
減圧発生カバー、ｒは空気導入口、りは整流板、ｌθは
筒状フィルム、／／はスペーサーをそれぞれ示す。In the figure, 7 is the air ring, % is the die, 3 is the outer lip, DA is the inner lip, j is the air outlet, 6 is the air suction hole, 2 is the reduced pressure generation cover, r is the air inlet, ri is the rectifier plate, lθ represents a cylindrical film, and // represents a spacer.

第１図に示すようにエアーリング／は円形スリットを有
するダイの上部に円形スリットを囲繞するように設けら
れている。As shown in FIG. 1, an air ring is provided on the top of a die having a circular slit so as to surround the circular slit.

エアーリング／には外側リップ３と内側リツブダが設け
られており、外側リップ３の内面はダイλの円形スリッ
トから押出された筒状フィルムＩＯの引取方向に向って
拡径されたテーパー面とされており、内側リツプクはこ
の外側リップの下方であってダイ側に設けられている。The air ring / is provided with an outer lip 3 and an inner riveter, and the inner surface of the outer lip 3 is a tapered surface whose diameter increases in the direction in which the cylindrical film IO is extruded from the circular slit of the die λ. The inner lip is provided below the outer lip and on the die side.

内側リツプグの内面は外側リップ３と同様に筒状フィル
ムの引取方向に向って拡径されているのが良いが拡径さ
れていなくとも使用できる。Like the outer lip 3, the inner surface of the inner lip is preferably expanded in diameter in the direction in which the cylindrical film is taken, but it can be used even if the inner surface is not expanded in diameter.

外側リップ３と内側リツプダとの間には間隙が形成され
ており、この間隙が空気吹出口ｊとされる。空気吹出口
ｊけ、該吹出口ｊから吹出された空気が、外側リップ３
のテーパー面と筒状フィルムの間をスムーズに流れるよ
うに筒状フィルム／Ｑの引取方向に向いて開孔さｈてい
るのが食込。A gap is formed between the outer lip 3 and the inner lip, and this gap is used as an air outlet j. The air blown out from the air outlet j is connected to the outer lip 3.
The holes that are opened facing the direction in which the cylindrical film/Q is taken are cut in so that it flows smoothly between the tapered surface of the cylindrical film and the cylindrical film.

内側リツプグとダイコとの間には空気吸込孔６が形成さ
れておシ、この空気吸込孔６がら空気を吸い込むことに
よ）筒状フィルム／θとエアーリング／との間に減圧域
を形成する。このためエアーリング／とダイ４との間に
は減圧を阻害するような大きな隙間が形成されないよう
に、通常は密着されて設けられている。エアーリング／
の位置を調節したい場合にはエアーリング／とダイとの
間に設けるスペーサー／／の厚さを変えれば良い。An air suction hole 6 is formed between the inner lip and the die, and by sucking air through this air suction hole 6, a reduced pressure area is formed between the cylindrical film /θ and the air ring. do. For this reason, the air ring and the die 4 are usually provided in close contact with each other so that a large gap that would impede pressure reduction is not formed between the air ring and the die 4. Air ring/
If you want to adjust the position of the air ring, you can change the thickness of the spacer provided between the air ring and the die.

上記したテーパー面及び減圧域による作用を空気の流れ
に従い説明する。The effects of the above-mentioned tapered surface and reduced pressure area will be explained according to the flow of air.

空気導入口ｒから導入された空気は邪魔板により整流さ
れ空気吹出口に向って送られる・送られた空気は第２図
に示すように空気流路に開口した空気吸引孔乙の上方を
逆過する。この空気吸引孔６が空気流路に開孔した部分
には、該開孔に被さるように減圧発生カバー７が設けら
ねており、空気流路を流れる空気及び減圧発生カバー７
によるベンチュリー効果によりとの空気吸引孔６内が減
圧状態となり、筒状フィルム１０と内側リツプダとの間
に減圧域が発生する。The air introduced from the air intake port R is rectified by the baffle plate and sent toward the air outlet.The sent air is then reversed above the air suction hole B opened in the air flow path, as shown in Figure 2. pass A reduced pressure generation cover 7 is provided at the part where the air suction hole 6 opens in the air flow path so as to cover the hole, and the air flowing through the air flow path and the reduced pressure generation cover 7 are provided.
Due to the Venturi effect, the inside of the air suction hole 6 becomes depressurized, and a depressurized region is generated between the cylindrical film 10 and the inner lipder.

空気流路を流れる空気は更に進み、空気吹出口から吹出
され筒状フィルム１０と外側リップ３のテーパー面との
間を通シ、外方に逃げる。The air flowing through the air flow path further advances, is blown out from the air outlet, passes between the cylindrical film 10 and the tapered surface of the outer lip 3, and escapes to the outside.

この空気の流れに伴う筒状フィルムＩＯの状態を説明す
れば、ダイλから押出された筒状フィルムＩＯは減圧域
で外方に吸引されるため予備的にある程度その径が拡径
され上方に送られる。上方に送られた筒状フィルム／θ
は空気吹出口ｊから吹出される空気によシ冷却されなが
ら外側リップ３のテーパー面に沿って拡径されつつ、最
終的に□筒状フィルムの内部に封入された空気等の気体
の圧力により所望の径まで拡径される。To explain the state of the cylindrical film IO accompanying this air flow, the cylindrical film IO extruded from the die λ is sucked outward in the reduced pressure area, so its diameter is preliminarily expanded to a certain extent and it is pushed upward. Sent. Cylindrical film sent upward/θ
is expanded in diameter along the tapered surface of the outer lip 3 while being cooled by the air blown out from the air outlet j, and finally □ due to the pressure of gas such as air sealed inside the cylindrical film. The diameter is expanded to the desired diameter.

すなわち、筒状フィルムＩＯはダイから押出された直後
に減圧域である程度拡径され、また外側リップ３のテー
パー面に沿って更に拡径される。このテーパー面に沿っ
ての拡径はテーパー面と筒状フィルムＩＯとの間が狭い
ため空気流の働きによりこの間がベンチュリー効Ｊｆｊ
Ｋ　ヨり若干減圧状態となり、筒状フィルムＩＯがテー
パー面に引き付けられて拡径するものと考えられる。That is, immediately after being extruded from the die, the cylindrical film IO is expanded in diameter to some extent in the reduced pressure region, and further expanded in diameter along the tapered surface of the outer lip 3. This diameter expansion along the tapered surface is due to the narrow space between the tapered surface and the cylindrical film IO, and due to the action of the air flow, this gap is affected by the Venturi effect Jfj.
It is considered that the pressure is slightly reduced at K yaw, and the cylindrical film IO is attracted to the tapered surface and expands in diameter.

更に１上記したような減圧域による拡径は、　。Furthermore, the diameter expansion due to the reduced pressure area as described above.

６１すに強い減圧度としてしまうと筒状フィルとの間隔
を調節することで減ＥＥ［は調節し得る。61. If the degree of decompression is set to be strong enough, the decompression EE can be adjusted by adjusting the distance from the cylindrical fill.

減圧域の減圧度は、樹脂の種類、所望ブローアツプ比等
により異なるが、通常０．２〜２０ｙｉｙｘ水柱、好ま
しくは／〜／！關水柱の減圧度とされるのが望ましい・
減圧度及び空気吹出口ｊからの空気吹出量等を調節する
ことによシ、空気吹出口！から内側リツプダと筒状フィ
ルム／θとの間を通）空気吸引孔乙に至る下向きの空気
流が生じ、この空気流が防御膜となシ、筒状フィルムＩ
Ｏが内側リツプダと接触するのが防止できる・外側リッ
プ３と筒状フィルムＩＯとの間の空気流にも同様の働き
があるのは勿論である。The degree of reduced pressure in the reduced pressure region varies depending on the type of resin, desired blow-up ratio, etc., but is usually 0.2 to 20 yiyx water column, preferably /~/! It is desirable that the degree of depressurization in the water column is
By adjusting the degree of pressure reduction and the amount of air blown from the air outlet j, the air outlet can be adjusted! A downward air flow is generated between the inner lipper and the cylindrical film/θ) to the air suction hole A, and this air flow serves as a protective film and the cylindrical film I
O can be prevented from coming into contact with the inner lipder.Obviously, the air flow between the outer lip 3 and the cylindrical film IO has a similar function.

第３図に示したものは本発明装置の他の一例であり、第
１図に示したように減圧発生カバー７等を設けずに外側
リップ３の下部に突起を設はベンチュリー効果を奏させ
るとと＜　Ｌ、たものである。The one shown in FIG. 3 is another example of the device of the present invention, in which, as shown in FIG. 1, a protrusion is provided at the lower part of the outer lip 3 without providing the reduced pressure generating cover 7, etc., to produce the Venturi effect. Toto < L, it is a thing.

また、外側リップ３の上方に整流板りを設は空気吹出口
ｊか４吹出された空気を筒状フィルム／θに沿って更に
良好に流れるようにしである。Further, a rectifying plate is provided above the outer lip 3 so that the air blown out from the air outlet j or 4 flows more favorably along the cylindrical film /θ.

Ｍ４’図に示しだものも本発明装置の他の７例で、第１
図に示したものよりもベンチュリー効果の発生域を空気
吹出口！の近傍に設けたものである。The ones shown in figure M4' are also seven other examples of the device of the present invention.
The air outlet has a greater Venturi effect generation area than the one shown in the figure! It is installed near the.

なお、第１図゛、第３図、第９図に示すように外側リッ
プ３はエアーりング／に螺合等の手段により取付け、上
下動可能としておくことにより空気吹出口！からの吹出
量や、空気吸引孔乙の減圧度等を調節し得るようになさ
れているのが望ましい。As shown in Figs. 1, 3, and 9, the outer lip 3 is attached to the air ring by screwing or other means, and is movable up and down, so that it can be used as an air outlet! It is desirable to be able to adjust the amount of air blown from the air outlet and the degree of pressure reduction from the air suction hole B.

更に、空気吸引孔６は第１図〜第Ｚ図に示し。Furthermore, air suction holes 6 are shown in FIGS.

たように空気流路に開孔させてベンチュリー効果により
減圧するのが機構的に簡便であり好ましいが、例えば空
気吸引孔６Ｉｌｃ外部に設けた吸引装置（図示せず）等
を接続し、これにより減圧としても良い。Although it is mechanically simple and preferable to open a hole in the air flow path and reduce the pressure by the Venturi effect, for example, by connecting a suction device (not shown) provided outside the air suction hole 6Ilc, It may also be reduced pressure.

このように、本発明の装置によれば、筒状フィルム１０
が、減圧域による減圧、テーパー面と筒状フィルムの間
に生ずるベンチュリー効果等により段階的に拡径されて
いくものであるから高いブローアツプ比にすることが可
能であり、また、筒状フィルムが減圧域、テーパー面の
減圧効果等によシ外方に吸引率ねた状態となり、かつ、
その間には空気流が連続的に流れているものであるから
筒状フィルムが極めて安定して成形し得る効果を奏する
。これにより高速成形が可能となり、実用上大変優りだ
装置である。Thus, according to the apparatus of the present invention, the cylindrical film 10
However, since the diameter is expanded in stages due to the reduced pressure in the reduced pressure area and the venturi effect that occurs between the tapered surface and the cylindrical film, it is possible to achieve a high blow-up ratio, and the cylindrical film Due to the reduced pressure area, the reduced pressure effect of the tapered surface, etc., the suction rate slumps outward, and
Since the air stream is continuously flowing between them, the cylindrical film can be formed extremely stably. This allows high-speed molding, making it a very practical device.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明装置の一例を示す縦断面図。 第一図ｉ−を第１図に示した装置の一部を拡大して示す
縦断面図、第３図５およびｉｇ図は本発明装置の他の一
例を示す縦断面図である。 図中／はエアーリング、２はダイ、３は外側リップ、グ
はり側リップ、ｊは空気吹出口、６は空気吸引孔、２は
減圧発生カバー、ざは空気導入口、りは整流板、１０は
筒状フィルム、／／け、スペーサーをそれぞれ示す。 出　願　人　　三菱化成工業株式会社 代　理　人　　弁理士　長谷用　　− 、（ほか７名） 第　１　図 昂　２　図 ゲ　３　図 第４図FIG. 1 is a longitudinal sectional view showing an example of the device of the present invention. FIG. 1 i- is an enlarged vertical cross-sectional view of a part of the apparatus shown in FIG. 1, and FIGS. 3-5 and ig are longitudinal cross-sectional views showing other examples of the apparatus of the present invention. In the figure / is the air ring, 2 is the die, 3 is the outer lip, the lip on the grate side, j is the air outlet, 6 is the air suction hole, 2 is the reduced pressure generation cover, is the air inlet, is the rectifying plate, 10 indicates a cylindrical film, a spacer, and a cylindrical film, respectively. Applicant Mitsubishi Chemical Industries, Ltd. Agent Patent Attorney Hase Yo -, (and 7 others) Figure 1 Figure 2 Figure 3 Figure 4

Claims (2)

【特許請求の範囲】[Claims] （１）　　円形スリットを有するインフレーション成形
用ダイと、該ダイの円形スリットを囲繞するように設け
られたエアーリン（とからなり、該エアーリくグの空気
吹出口を、円形スリットから押出された筒状フイールム
の引取方向に向って拡径されたチー、パー圓を有する外
側リップと該外側リップよりダイ側に設けられた内側リ
ップとの間に形成し、該内側リップとダイとの間には空
気吸、引孔を形成した９とを特徴とするインフレー・ジ
ョンフィルム成形装置０(1) Consisting of an inflation molding die having a circular slit, and an air ring provided to surround the circular slit of the die, the air outlet of the air ring is connected to a cylindrical tube extruded from the circular slit. It is formed between an outer lip having a chi and a par circle whose diameter increases in the direction of film take-up, and an inner lip provided closer to the die than the outer lip, and air is formed between the inner lip and the die. Inflation film forming apparatus 0 characterized by 9 having suction and suction holes formed therein. （２）空気吸引孔はモアーリングの空気流路匠開孔して
おり、ベンチュリー効果により、減圧状態とされ、内側
リップとダイとの間の空気を吸引するようにしたことを
特徴とする特許請求の範囲第７項に記載の装置。(2) A patent characterized in that the air suction hole has a Moring air flow channel design, which is in a reduced pressure state due to the Venturi effect, and the air between the inner lip and the die is sucked. Apparatus according to claim 7.
JP56174350A 1981-10-30 1981-10-30 Inflation film molding device Granted JPS5874322A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP56174350A JPS5874322A (en) 1981-10-30 1981-10-30 Inflation film molding device
KR8204843A KR880001768B1 (en) 1981-10-30 1982-10-28 Apparatus for forming blown films
GB08231002A GB2110159B (en) 1981-10-30 1982-10-29 Cooling blown films
DE19823240212 DE3240212A1 (en) 1981-10-30 1982-10-29 DEVICE FOR PRODUCING TUBE FILMS
FR8218189A FR2515571B1 (en) 1981-10-30 1982-10-29 APPARATUS FOR FORMING BLOWN FILMS
US06/624,791 US4505657A (en) 1981-10-30 1984-06-26 Apparatus for forming blown films

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56174350A JPS5874322A (en) 1981-10-30 1981-10-30 Inflation film molding device

Publications (2)

Publication Number Publication Date
JPS5874322A true JPS5874322A (en) 1983-05-04
JPH0116655B2 JPH0116655B2 (en) 1989-03-27

Family

ID=15977100

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56174350A Granted JPS5874322A (en) 1981-10-30 1981-10-30 Inflation film molding device

Country Status (1)

Country Link
JP (1) JPS5874322A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6015121A (en) * 1983-07-08 1985-01-25 Idemitsu Petrochem Co Ltd Method of forming blown film
CN112959571A (en) * 2021-02-04 2021-06-15 深圳弘臻新材料科技有限公司 Temperature control air disc for primary forming in PVC heat-shrinkable tube production process
CN114789570A (en) * 2022-03-24 2022-07-26 广州市普同实验分析仪器有限公司 Film rigid blowing device and method thereof

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6015121A (en) * 1983-07-08 1985-01-25 Idemitsu Petrochem Co Ltd Method of forming blown film
CN112959571A (en) * 2021-02-04 2021-06-15 深圳弘臻新材料科技有限公司 Temperature control air disc for primary forming in PVC heat-shrinkable tube production process
CN114789570A (en) * 2022-03-24 2022-07-26 广州市普同实验分析仪器有限公司 Film rigid blowing device and method thereof
CN114789570B (en) * 2022-03-24 2024-05-17 广州市普同实验分析仪器有限公司 Film rigid blowing device and method thereof

Also Published As

Publication number Publication date
JPH0116655B2 (en) 1989-03-27

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