JPS6211630A - Manufacturing device for inflation film - Google Patents

Manufacturing device for inflation film

Info

Publication number
JPS6211630A
JPS6211630A JP60152627A JP15262785A JPS6211630A JP S6211630 A JPS6211630 A JP S6211630A JP 60152627 A JP60152627 A JP 60152627A JP 15262785 A JP15262785 A JP 15262785A JP S6211630 A JPS6211630 A JP S6211630A
Authority
JP
Japan
Prior art keywords
film
control
opening
closing
valve
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
Application number
JP60152627A
Other languages
Japanese (ja)
Inventor
Hideho Iwata
秀穂 岩田
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.)
Hagiwara Industries Inc
Original Assignee
Hagiwara Industries Inc
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 Hagiwara Industries Inc filed Critical Hagiwara Industries Inc
Priority to JP60152627A priority Critical patent/JPS6211630A/en
Publication of JPS6211630A publication Critical patent/JPS6211630A/en
Pending 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
    • B29C48/03—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
    • 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
    • B29C2948/92009—Measured parameter
    • B29C2948/92114—Dimensions
    • B29C2948/92123—Diameter or circumference
    • 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
    • B29C2948/92323—Location or phase of measurement
    • B29C2948/92428—Calibration, after-treatment, or cooling 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
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • 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
    • B29C2948/92923—Calibration, after-treatment or cooling 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
    • B29C48/001—Combinations of extrusion moulding with other shaping operations
    • B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)

Abstract

PURPOSE:To control not only the discharging amount of cooling air but also the suction amount of the same and stabilize cooling effect by a method wherein an opening and closing signal for the discharge control valve of cooling air is fed back to the feeding valve of the cooling air to control the opening and closing of the feeding valve. CONSTITUTION:A product diameter detecting sensor 12 is equipped immediately above a frost line 11, whereat whitening of a transparent film is started, in order to control the width of film by passing cooling air between a guide tube 3 and the film. The output of the product diameter detecting sensor 12 becomes an opening and closing input for a control motor 16 for controlling the opening and closing of the discharging side valve through an operator 17. The control motor 16 is provided with a sensor 19 for detecting the opening degree of the valve and feedback of the output to a feed air side valve opening and closing control motor 15 is effected through another operator 18 to control the air feeding valve 5. Accordingly, perfect correction with respect to external turbulence is effected and, whereby, nonuniformity in thickness of inflation film, fluctuation of width of the film, generation of wrinkles or the like may be prevented.

Description

【発明の詳細な説明】 〈産業上の利用分野〉 本発明はインフレーションフィルム製造装置の改良に関
するものである。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to an improvement in a blown film manufacturing apparatus.

〈従来の技術〉 インフレーションフィルムの製造に際して、チューブ状
フィルムを所定幅にするための技術は、特に最近のよう
に高速成形が要請されるようになると、従来の技術に新
たな改良の必要性が生じている。その−例としては、エ
アーリングと膨張筒を備えた構造のインフレーションフ
ィルムの製造装置において、膨張筒をエアーリングの環
状冷却風吹出口の外側にのみ設け、その下部に二次空気
の取入口を設けて、高速化に対処したものがある（特開
昭５１−３４９５８号）。すなわち、高吐出量、高速引
取りの場合、プラスチックチューブの冷却不足はフロス
トラインの上昇となって、厚みむら、フィルム幅の変動
、しわの発生を生じる原因となる。<Prior art> When manufacturing blown film, the technology for making tubular films into a predetermined width has become necessary, especially as high-speed molding has become required recently. It is occurring. For example, in a blown film manufacturing device that has an air ring and an expansion tube, the expansion tube is provided only outside the annular cooling air outlet of the air ring, and a secondary air intake is provided at the bottom of the expansion tube. There is a method that deals with speeding up (Japanese Patent Laid-Open No. 51-34958). That is, in the case of a high discharge rate and high speed take-off, insufficient cooling of the plastic tube causes the frost line to rise, causing uneven thickness, fluctuations in film width, and wrinkles.

このことは、本発明が対象としている案内筒（３）とフ
ィルム間に冷却空気を通じてフィルム幅を制御する構造
のものにあっても同様である。この冷却空気の制御は従
来、フロストライン直上にセンサを設置し、この電気出
力等を演算し、その結果により排気制御バルブ（４）の
関度を調節していた。This also applies to the structure that controls the film width by passing cooling air between the guide tube (3) and the film, which is the object of the present invention. Conventionally, this cooling air was controlled by installing a sensor directly above the frost line, calculating the electrical output, etc., and adjusting the function of the exhaust control valve (4) based on the results.

〈発明が解決しようとする問題点〉 しかし、これまでのような排気側のバルブ制御方式であ
ると、稼働中の外乱、特に、長い経過時間における吸気
の温度変化により、吸気量が変動する。そこで、吸気量
が変化することにより、冷却効果及び排気量に対する制
御量の割合（以下制御量のバランスと称す）が変化し、
前述のような製品幅の一定しない要因となっていた。<Problems to be Solved by the Invention> However, with the conventional exhaust-side valve control system, the amount of intake air fluctuates due to disturbances during operation, particularly changes in intake air temperature over a long period of time. Therefore, by changing the intake air amount, the ratio of the control amount to the cooling effect and the exhaust amount (hereinafter referred to as the balance of the control amount) changes,
This was a factor in the inconsistent product range as mentioned above.

く問題点を解決するための手段〉 そこで本発明においては、　ダイスリット（１）より筒
状にフィルム（２）を押出し、　その内部の案内筒（３
）とフィルム間に冷却空気を通じて　フィルム幅を制御
する装置において、冷却空気の排気制御バルブ（４）の
開閉信号を給気バルブ（５）にもフィードバックして開
閉制御することとしたのである。Means for Solving the Problems> Therefore, in the present invention, the film (2) is extruded into a cylindrical shape through the die slit (1), and the guide tube (3
) and the film to control the film width, we decided to feed back the opening/closing signal of the cooling air exhaust control valve (4) to the air supply valve (5) to control its opening/closing.

〈作用〉 このような構造であると、冷却空気の排気量制御のみな
らず吸気量の制御がなされて、バルブの開度−風量が直
線関係を示す安定領域を保持することができるので、制
御量のバランス、すなわち冷却効果の一定化が可能とな
る。<Function> With this structure, not only the exhaust amount of cooling air but also the intake air amount is controlled, and a stable region in which the valve opening degree and air flow rate show a linear relationship can be maintained, so the control It becomes possible to balance the amount, that is, to make the cooling effect constant.

〈実施例〉 以下図面によって本発明の実施例を詳細に説明する。<Example> Embodiments of the present invention will be described in detail below with reference to the drawings.

第１図は本発明のインフレーションフィルム製造装置を
示す略図である。FIG. 1 is a schematic diagram showing a blown film manufacturing apparatus of the present invention.

インフレーションフィルムはダイ（６）のスリット（１
）から押出され、その内部の冷却空気吹出口（７）、そ
の先の案内筒（３）、外部より冷却空気を送る外部冷却
リング（８）により筒状のフィルム（２）として成形さ
れる。その内部の案内筒（３）とフィルム間に冷却空気
を通じてフィルム幅を制御するために、フィルムが透明
から白化がはじまるフロストライン（１１）の直上に製
品径検出センサ（１２）が設置されている。冷却空気の
給気を目的として給気ブロワ−（１３）が設けられ、ま
た、排気を目的として排気ブロワ−（１４）が設けられ
ている。これらにはいずれも前又は後へバルブ開閉コン
トロールモータ（１５）　（１６）を備えている。The blown film is inserted into the slit (1) of the die (6).
), and is formed into a cylindrical film (2) by a cooling air outlet (7) inside, a guide cylinder (3) beyond it, and an external cooling ring (8) that sends cooling air from the outside. In order to control the film width by passing cooling air between the inner guide tube (3) and the film, a product diameter detection sensor (12) is installed directly above the frost line (11) where the film starts to turn white from transparent. . A supply air blower (13) is provided for the purpose of supplying cooling air, and an exhaust blower (14) is provided for the purpose of exhausting air. Each of these is equipped with a valve opening/closing control motor (15) (16) at the front or rear.

前記製品径検出センサ（１２）の出力は演算器Ａ（１７
）を介して排気側バルブ開閉コントロールモータ（１６
）の開閉入力となる。ここで１本発明においては、　こ
の排気制御バルブ（４）の開閉信号を給気バルブ（５）
にもフィードバックして開閉制御するために、排気側バ
ルブ開閉コントロールモータ（１６）にバルブ開度検出
センサ（１９）となるポテンシオメータを設けて、その
出力を演算器Ｂ　（１８）を介して給気側バルブ開閉コ
ントロールモータ（１５）へフィードバックして給気バ
ルブ（５）の制御ができるようにしたのである。この場
合、排気側バルブ開閉コントロールモータ（１６）は主
制御用であって、給気側バルブ開閉コントロールモータ
（１５）は補正制御に用いられる。The output of the product diameter detection sensor (12) is sent to the arithmetic unit A (17).
) via the exhaust side valve opening/closing control motor (16
) is the opening/closing input. Here, in the present invention, the opening/closing signal of the exhaust control valve (4) is transmitted to the air supply valve (5).
In order to control the opening/closing by giving feedback to the exhaust side valve opening/closing control motor (16), a potentiometer serving as a valve opening detection sensor (19) is provided, and its output is supplied via computing unit B (18). The air supply valve (5) can be controlled by feeding back to the air side valve opening/closing control motor (15). In this case, the exhaust side valve opening/closing control motor (16) is used for main control, and the intake side valve opening/closing control motor (15) is used for correction control.

〈発明の効果〉 本発明のインフレーションフィルム製造装置は以上詳述
したような構造であるから、昼間がら夜間にまたがる外
気温に差のある長時間に亘る製造時においても、外乱に
対して完全な補正がなされ、インフレーションフィルム
の厚みむら、フィルム幅の変動、しわの発生等を防止で
きる。<Effects of the Invention> Since the blown film manufacturing apparatus of the present invention has the structure as detailed above, it can be completely protected against external disturbances even during long-time manufacturing with differences in outside temperature from daytime to nighttime. Correction is performed, and it is possible to prevent unevenness in the thickness of the blown film, fluctuations in film width, wrinkles, etc.

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

第１回は本発明のインフレーションフィルム製造装置を
示す略図である。 （１）ダイスリット　　　（２）フィルム（３）案内筒
　　　　　　（４）排気制御バルブ（５）給気バルブ　
　　　（６）ダイ （７）冷却空気吹出口　　（８）外部冷却リング（１１
）フロストライン　（１２）製品径検出センサ（１３）
給気ブロワ−（１４）排気ブロワ−（１５）　（１６）
バルブ開閉コントロールモータ（１７）演算器Ａ　　　
　　（１８）演算器Ｂ（１９）バルブ開度検出センサ 以上The first part is a schematic diagram showing the blown film manufacturing apparatus of the present invention. (1) Die slit (2) Film (3) Guide cylinder (4) Exhaust control valve (5) Air supply valve
(6) Die (7) Cooling air outlet (8) External cooling ring (11)
) Frost line (12) Product diameter detection sensor (13)
Supply air blower (14) Exhaust blower (15) (16)
Valve opening/closing control motor (17) Arithmetic unit A
(18) Arithmetic unit B (19) Valve opening detection sensor or higher

Claims (1)

【特許請求の範囲】[Claims] １　ダイスリット（１）より筒状にフィルム（２）を押
出し、その内部の案内筒（３）とフィルム間に冷却空気
を通じてフィルムを冷却しかつ幅を制御する装置におい
て、冷却空気の排気制御バルブ（４）の開閉信号を給気
バルブ（５）にもフィードバックして開閉制御すること
を特徴とするインフレーションフィルム製造装置。1 In a device that extrudes a film (2) in a cylindrical shape from a die slit (1), cools the film by passing cooling air between the film and the guide cylinder (3) inside the film, and controls the width, an exhaust control valve for cooling air is used. A blown film manufacturing apparatus characterized in that the opening/closing signal of (4) is also fed back to the air supply valve (5) to control opening/closing.
JP60152627A 1985-07-10 1985-07-10 Manufacturing device for inflation film Pending JPS6211630A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60152627A JPS6211630A (en) 1985-07-10 1985-07-10 Manufacturing device for inflation film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60152627A JPS6211630A (en) 1985-07-10 1985-07-10 Manufacturing device for inflation film

Publications (1)

Publication Number Publication Date
JPS6211630A true JPS6211630A (en) 1987-01-20

Family

ID=15544515

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60152627A Pending JPS6211630A (en) 1985-07-10 1985-07-10 Manufacturing device for inflation film

Country Status (1)

Country Link
JP (1) JPS6211630A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110920043A (en) * 2019-12-04 2020-03-27 南京顶顺包装有限公司 Thermal contraction film blowing unit

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110920043A (en) * 2019-12-04 2020-03-27 南京顶顺包装有限公司 Thermal contraction film blowing unit

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