JPS5842431A - Method and apparatus for changing diameter of tubular film - Google Patents
Method and apparatus for changing diameter of tubular filmInfo
- Publication number
- JPS5842431A JPS5842431A JP56140889A JP14088981A JPS5842431A JP S5842431 A JPS5842431 A JP S5842431A JP 56140889 A JP56140889 A JP 56140889A JP 14088981 A JP14088981 A JP 14088981A JP S5842431 A JPS5842431 A JP S5842431A
- Authority
- JP
- Japan
- Prior art keywords
- tubular film
- disc
- disk
- diameter
- shaped body
- 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
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
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
- B29C48/902—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies internally
-
- 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
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/90—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article
- B29C48/901—Thermal treatment of the stream of extruded material, e.g. cooling with calibration or sizing, i.e. combined with fixing or setting of the final dimensions of the extruded article of hollow bodies
-
- 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)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は熱可塑性樹脂の管状フィルムの成形において、
成形を中断することなく管状フィルムの口径（折りたた
んだ場合には折径）を変更する方法およびそれを実施す
るための装置に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention provides the following steps in molding a tubular film of thermoplastic resin:
The present invention relates to a method for changing the diameter of a tubular film (fold diameter when folded) without interrupting molding, and an apparatus for carrying out the method.
従来、高密度ポリエチレン等の熱可塑性樹脂の管状フィ
ルムの成形において、特に成形条件が高ブロー比、高速
引取の場合に、管状フィルムのゆれを防ぎ、フラット性
の優れたフィルムを成形するために、管状フィルムの内
部に環状ダイスに連結する円柱状円錐台状あるいは間隔
をおいて設けた複数個の円板状体よりなる内部安定体を
用いていた。これらのうち、間隔をおいて設けた複数個
の円板状体よりなる内部安定体を用いる方法では、管状
フィルムの接触圧が強く優れたフィルムを成形すること
ができるとともに円板状体の直径を適切に設定し、内部
安定体を適切なものに交換することにより広巾から狭巾
までの広い範囲の口径（折径）のフィルムを成形するこ
とが可能である。Conventionally, in the molding of tubular films of thermoplastic resins such as high-density polyethylene, especially when the molding conditions are high blowing ratio and high-speed take-up, in order to prevent the tubular film from wobbling and to mold a film with excellent flatness, An internal stabilizer consisting of a cylindrical truncated conical shape or a plurality of spaced disc shaped bodies connected to an annular die was used inside the tubular film. Among these methods, the method using an internal stabilizer consisting of a plurality of disc-shaped bodies provided at intervals allows forming an excellent film with strong contact pressure of the tubular film, and the diameter of the disc-shaped bodies By appropriately setting the internal stabilizer and replacing the internal stabilizer with an appropriate one, it is possible to form films with a wide range of apertures (folding diameters) from wide to narrow.
一方、従来、成形条件を変更して管状フィルムの口径（
折径）を変更する場合には、一旦フイルム成形を中断し
て安定体を交換する必要があり、時間的なロスに加えて
再スタート時の原材料のロスが多く発生し、生産効率の
低下の原因となっていた。On the other hand, conventionally, the diameter of the tubular film (
When changing the fold diameter, it is necessary to temporarily stop film forming and replace the stabilizer, which results in a loss of time and a large amount of raw material when restarting, resulting in a decrease in production efficiency. It was the cause.
本発明は間隔をおいて設けた複数個の円板状体を内部安
定体として用いる管状フィルム成形の特し
徴を生Ｖて広い範囲の口径のフィルムを、成形を中断す
ることなく連続して生産することを目的としたものであ
って、その要旨は、環状ダイスより溶融押出した管状フ
ィルムを間隔をおいて設けた複数個の円板状体よりなる
内部安定体に接触させる熱可塑性樹脂の管状フィルムの
成形において、円板状体の上下位置を変えることを特徴
とする管状フィルムの口径を変更する方法、および円板
状体の上下位置を可変にすることを特徴とする、間隔を
おいて設けた複数個の円板状体よりなる管状フィルムの
内部安定体である。The present invention takes advantage of the characteristics of tubular film forming using a plurality of spaced-apart disk-like bodies as internal stabilizers to continuously form films of a wide range of diameters without interrupting the forming process. The purpose is to produce a thermoplastic resin by bringing a tubular film melted and extruded from an annular die into contact with an internal stabilizer consisting of a plurality of spaced disc-shaped bodies. A method for changing the aperture of a tubular film in forming a tubular film, which is characterized by changing the vertical position of a disc-shaped body, and a method for changing the diameter of a tubular film, which is characterized by making the vertical position of a disc-shaped body variable. This is an internal stabilizer of a tubular film made up of a plurality of disk-shaped bodies provided with a tube.
第１図は本発明の方法および装置の一例を示す縦断面図
で第２図はその部分拡大図であるが、これらを用いて本
発明をさらに詳しく説明する。FIG. 1 is a longitudinal sectional view showing an example of the method and apparatus of the present invention, and FIG. 2 is a partially enlarged view thereof, and the present invention will be explained in more detail using these figures.
押出機（図示しない。）に連結する環状ダイス１より管
状フィルム２を溶融押出し、固定棒４と間隔をおいて設
けた複数個の円板状体５からなる内部安定体に接触させ
、その後ブローアツプして７０ストライン３を経て巻取
られる。ただし、管状面より２番目に遠い円板状体５ｂ
の直径よりも大きい円板状体５ａには接触しない。こ
うして口径の小さい（従って折径の小さい）管状フィル
ムが成形される。A tubular film 2 is melt-extruded from an annular die 1 connected to an extruder (not shown), brought into contact with an internal stabilizer consisting of a fixed rod 4 and a plurality of disc-shaped bodies 5 provided at intervals, and then blow-up. Then, it is wound up after passing through 70 lines 3. However, the second disk-shaped body 5b from the tubular surface
It does not contact the disc-shaped body 5a whose diameter is larger than that of the disc-shaped body 5a. In this way, a tubular film with a small diameter (and therefore a small fold diameter) is formed.
るのであるが、単にダイス面最遠の直径の大きい円板状
体５ａをダイス面に近づけて５ａ’に位置させ、管状フ
ィルム内に若干量の空気を吹込めばよい。However, it is sufficient to simply bring the large-diameter disk-like body 5a farthest from the die surface close to the die surface and position it at 5a', and blow a small amount of air into the tubular film.
フィルムの厚さを元と同じにしたければ押出機の回転数
を上げ、樹脂の押出量を増せばよい。If you want to keep the film thickness the same as the original, you can increase the rotation speed of the extruder and increase the amount of resin extruded.
円板状体の上下位置を変える方法は任意であるが、例え
が第２図に示すように、中空の固定棒４ａの上部内部に
上下の摺動可能に固定棒４ｂ をおき固定棒４ａに一端
を固定して設けられ、他端を固定棒４ｂに連結したエア
シリンダー６の動作によって可能であΣ。円板状体５ａ
は摺動可能な固定棒４ｂに設けられている。内部エアー
は、その通気管７および固定棒４ｂの上部に開口した通
気口８によって管状フィルムの内部に送られる。円板状
体５ａはエアシリンダーの遠隔操作により、エアシリン
ダーに設定したストローク−長に応じ５ａ’に変えるこ
とができる。さらにダイス面より２番目あるいは３番目
の円板状体の上下位置を変えるようにすれば管状フィル
ムの口径を３段以上に変更することが可能である。
゛
本発明の円板状体の直径は、ダイス口径の０５〜１．５
倍の範囲で選ばれ、その形状は、円板、円盤、算盤法お
よびこれらの複合体等種々採用できる。またこの数は３
個以上の任意の数に選ぶことができるが３〜７個の範囲
で目的を達することができる。溶融押出した管状フィル
ムと円板状体とに区切られる空間の圧力を調節し、管状
フィルムの円板状体への接触圧を調整するために、個々
の円板状体に開口面積固定または可変の通気孔を設ける
ことは好ましいことである。各円板状体端部はアールを
つけるのが良い。各円板状体端部の縦方向の間隔は０３
〜５０ｃｒｎ１各円板状体端部と固定棒４との横方向の
間隔は溶融管状フィルムが固定棒に触れないようにする
ため５８以上設けるのが好しい。円板状体の材質は金属
等熱によって変形などしない耐熱性のものであればよい
。なお固定棒は必らずしも中心に位置し、または１本で
ある必要はないが、複数個の円板状体は環状ダイスの中
心線を実質的に中心とし、環状ダイスに連結して設ける
。The method of changing the vertical position of the disc-shaped body is arbitrary, but as shown in FIG. This is possible by the operation of an air cylinder 6 that is fixed at one end and connected to the fixed rod 4b at the other end. Disc-shaped body 5a
is provided on the slidable fixed rod 4b. Internal air is sent into the interior of the tubular film through its vent pipe 7 and vent hole 8 opened at the top of the fixing rod 4b. The disc-shaped body 5a can be changed to 5a' by remote control of the air cylinder, depending on the stroke length set for the air cylinder. Furthermore, by changing the vertical position of the second or third disk-shaped body from the die surface, it is possible to change the diameter of the tubular film to three or more stages.
゛The diameter of the disc-shaped body of the present invention is 05 to 1.5 of the die diameter.
The shape can be selected within a range of times, and various shapes can be adopted, such as a disc, a disk, an abacus, and a composite thereof. Also, this number is 3
Any number greater than 1 can be selected, but the objective can be achieved with a range of 3 to 7. In order to adjust the pressure in the space divided between the melt-extruded tubular film and the disc-shaped body, and to adjust the contact pressure of the tubular film to the disc-shaped body, the opening area of each disc-shaped body is fixed or variable. It is preferable to provide ventilation holes. It is preferable that the ends of each disc-shaped body be rounded. The vertical distance between the ends of each disc is 03
~50 crn1 It is preferable that the lateral spacing between the end of each disk-shaped body and the fixing rod 4 is 58 or more to prevent the molten tubular film from touching the fixing rod. The disc-shaped body may be made of a heat-resistant material that does not deform due to heat, such as metal. It should be noted that the fixed rod does not necessarily have to be located at the center or be one, but the plurality of disc-shaped bodies are substantially centered on the center line of the annular die and connected to the annular die. establish.
以下に実施例、比較例を挙げて本発明をさらに詳細に説
明する。The present invention will be explained in more detail by giving Examples and Comparative Examples below.
実施例
口径９０１グ、環状ダイス径２００％戸の押出機に、環
状ダイスの中心線を中心とし、ダイスよの円板状体は固
定棒に固定され、最遠の２００Ｘｙの円板は、第２図に
示した駆動方法により隣接の１７０％戸の円板よりの距
離が２００ ％ （第１ス面よりそれぞれ２００％、３
００％、３００％、２００％の間隔をおいた内部安定体
を設け、高密度ポリエチレン；昭和電工株式会社製ショ
ウレックス（登録商標）ＦＸＯＩ ３２Ｈ−５（密度０
９５０ｇ／Ｃｒｎ３、メルトインデックス ０．０６
ｆｊ ／１ （１＋Ｊを使用して、引取速度６０ ｍ
／ｍ＝にて折径１．３５０％、厚み１０μの管状フィル
ムを成形した。Example: In an extruder with a diameter of 901g and an annular die with a diameter of 200%, the disk-like body of the die was fixed to a fixed rod with the center line of the annular die as the center, and the farthest disk of 200Xy was By the driving method shown in Figure 2, the distance from the disk of the adjacent 170% door is 200% (200% and 3
Internal stabilizers are provided at intervals of 00%, 300%, and 200%.
950g/Crn3, melt index 0.06
fj /1 (using 1+J, take-up speed 60 m
A tubular film having a fold diameter of 1.350% and a thickness of 10 μm was molded at /m=.
この場合、溶融押出された管状フィルムはダイス面より
最遠の円板には触れない。ついで折径を１．８００％に
するためにまずダイス面より最遠の円板をダイス側に移
動させ、第１図における５ａ’の位置、隣接の円板より
の間隔を５０％にして、管状フィルムをこの円板に接触
させるとともに、内部エアーを若干吹込′ｔＪ。また同
時に押出機の回転数を上げると折径１，８００％、厚み
ｌＯμの管状フィルムが引取速度６ｃ）ｍ／ｍｍで得ら
れた。このフィルムの折径の変更の間の所要時間は約５
分であった。In this case, the melt-extruded tubular film does not touch the disk furthest from the die surface. Next, in order to make the folding diameter 1.800%, first move the disk farthest from the die surface to the die side, set the position 5a' in Fig. 1, and set the distance from the adjacent disk to 50%. While bringing the tubular film into contact with this disk, some internal air was blown into it. At the same time, when the rotational speed of the extruder was increased, a tubular film having a fold diameter of 1,800% and a thickness of 10μ was obtained at a take-up speed of 6 c) m/mm. The time required to change the fold diameter of this film is approximately 5
It was a minute.
比較例
実施例と同じ押出機に、ダイスより順に１９０％戸、１
８０％ｕ、１．７０％戸の円板をダイス面より２０〇九
、３００％、３００％の間隔をおいた内部安定体を設け
、同じ原料ポリエチレンにて、折径１．３５０％、厚み
１０μの管状フィルムを、６ａｍ／ｍｍの速度にて成形
した。ついで成形を中断してダイスより順に１９０％ｕ
、１８０％戸、２００％戸の円板をダイス面より２００
％、３０ＱＴＡ、３５０％の間隔をおいた内部安定体と
取替えて、折径１，８００％、厚み１０μの管状フィル
ムを同じ速度にて成形した。この間、３０分の時間を要
し、再スタートに際し、約１０ｋｙの原料ポリエチレン
をロスした。Comparative Example In the same extruder as in Example, 190% and 1
A circular plate of 80% U and 1.70% is provided with internal stabilizers spaced 2009, 300%, and 300% from the die surface, and made of the same raw material polyethylene with a folded diameter of 1.350% and a thickness. A 10μ tubular film was cast at a speed of 6am/mm. Then, the molding was stopped, and the die was heated to 190% u.
, 180% door, 200% door disk from the die side 200
%, 30QTA, 350% spacing, and a tubular film with a fold diameter of 1,800% and a thickness of 10 microns was formed at the same speed. During this time, it took 30 minutes, and about 10 ky of raw polyethylene was lost when restarting.
第１図は本発明の方法および装置の一例を示す縦断面図
であり、図中点線は口径の大きい管状フィルムを成形す
るときの状態を示し、５ａと５ａ’間の矢印は円板状体
の移動範囲を示している。
第２図は円板状体の上下位置を変える方法の一例を示す
縦断面図である。
１・・・環状ダイス、 ２．２′・・・管状フィルム
、３・・・７０ストライン、
４．４ａ、４ｂ・・・固定棒、
５．５ａ、５ｂ・・・円板状体、
６・・・エアシリンダー
特許出願人 昭和電工株式会社
（９） −１７７FIG. 1 is a longitudinal cross-sectional view showing an example of the method and apparatus of the present invention, in which the dotted line indicates the state when forming a tubular film with a large diameter, and the arrow between 5a and 5a' indicates a disc-shaped body. The range of movement is shown. FIG. 2 is a longitudinal sectional view showing an example of a method for changing the vertical position of the disc-shaped body. DESCRIPTION OF SYMBOLS 1... Annular die, 2.2'... Tubular film, 3... 70 strings, 4.4a, 4b... Fixed rod, 5.5a, 5b... Disc-shaped body, 6 ...Air cylinder patent applicant Showa Denko Co., Ltd. (9) -177
Claims (2)
をおいて設けた複数個の円板状体よりなる内部安定体に
接触させる熱可塑性樹脂の管状フィルムの成形において
、円板状体の上下位置を変えることを特徴とする管状フ
ィルムの口径を変更する方法。(1) In forming a tubular film of thermoplastic resin in which a tubular film melt-extruded from an annular die is brought into contact with an internal stabilizer consisting of a plurality of disc-shaped bodies provided at intervals, the vertical position of the disc-shaped body A method of changing the caliber of a tubular film, characterized by changing the caliber of a tubular film.
る、間隔をおいて設けた複数個の円板状体よりなる管状
フィルムの内部安定体(2) An internal stabilizer of a tubular film consisting of a plurality of disc-shaped bodies arranged at intervals, characterized in that the vertical position of the disc-shaped bodies is variable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56140889A JPS5842431A (en) | 1981-09-09 | 1981-09-09 | Method and apparatus for changing diameter of tubular film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56140889A JPS5842431A (en) | 1981-09-09 | 1981-09-09 | Method and apparatus for changing diameter of tubular film |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5842431A true JPS5842431A (en) | 1983-03-11 |
Family
ID=15279136
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56140889A Pending JPS5842431A (en) | 1981-09-09 | 1981-09-09 | Method and apparatus for changing diameter of tubular film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5842431A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2571301A2 (en) * | 1984-10-08 | 1986-04-11 | Windmoeller & Hoelscher | COOLING DEVICE FOR PLASTIC SHEETS EXTRUDED IN SHEATH OF A SHEET BLOWING HEAD |
| JPS6248528A (en) * | 1985-08-28 | 1987-03-03 | Asahi Chem Ind Co Ltd | Manufacture of tubular balance film |
| US4784597A (en) * | 1985-08-10 | 1988-11-15 | Super Bag Company, Ltd. | Apparatus for producing blown film |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55158935A (en) * | 1979-05-28 | 1980-12-10 | Idemitsu Petrochem Co Ltd | Resin bubble stabilizer |
| JPS5646729A (en) * | 1979-09-26 | 1981-04-28 | Showa Denko Kk | Internal portion stabilizing device for tubular film |
-
1981
- 1981-09-09 JP JP56140889A patent/JPS5842431A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55158935A (en) * | 1979-05-28 | 1980-12-10 | Idemitsu Petrochem Co Ltd | Resin bubble stabilizer |
| JPS5646729A (en) * | 1979-09-26 | 1981-04-28 | Showa Denko Kk | Internal portion stabilizing device for tubular film |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2571301A2 (en) * | 1984-10-08 | 1986-04-11 | Windmoeller & Hoelscher | COOLING DEVICE FOR PLASTIC SHEETS EXTRUDED IN SHEATH OF A SHEET BLOWING HEAD |
| US4643657A (en) * | 1984-10-08 | 1987-02-17 | Windmoller & Holscher | Apparatus for cooling tubular plastic films extruded from a film blowing head |
| US4784597A (en) * | 1985-08-10 | 1988-11-15 | Super Bag Company, Ltd. | Apparatus for producing blown film |
| JPS6248528A (en) * | 1985-08-28 | 1987-03-03 | Asahi Chem Ind Co Ltd | Manufacture of tubular balance film |
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