JPH0146305B2 - - Google Patents
Info
- Publication number
- JPH0146305B2 JPH0146305B2 JP59226762A JP22676284A JPH0146305B2 JP H0146305 B2 JPH0146305 B2 JP H0146305B2 JP 59226762 A JP59226762 A JP 59226762A JP 22676284 A JP22676284 A JP 22676284A JP H0146305 B2 JPH0146305 B2 JP H0146305B2
- Authority
- JP
- Japan
- Prior art keywords
- presser roll
- roll
- presser
- forming apparatus
- film forming
- 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
- 238000001816 cooling Methods 0.000 claims description 10
- 230000017525 heat dissipation Effects 0.000 claims description 9
- 229920003002 synthetic resin Polymers 0.000 claims description 9
- 239000000057 synthetic resin Substances 0.000 claims description 9
- 239000000498 cooling water Substances 0.000 claims description 7
- 230000005855 radiation Effects 0.000 claims description 2
- 239000011347 resin Substances 0.000 description 18
- 229920005989 resin Polymers 0.000 description 18
- 238000000034 method Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229910010272 inorganic material Inorganic materials 0.000 description 1
- 239000011147 inorganic material Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000003595 mist Substances 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
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
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/915—Cooling of flat articles, e.g. using specially adapted supporting means with means for improving the adhesion to the supporting means
- B29C48/9155—Pressure rollers
-
- 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
- B29C48/07—Flat, e.g. panels
- B29C48/08—Flat, e.g. panels flexible, e.g. films
-
- 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
- B29C48/9135—Cooling of flat articles, e.g. using specially adapted supporting means
- B29C48/914—Cooling of flat articles, e.g. using specially adapted supporting means cooling drums
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は合成樹脂フイルムの製膜装置に関し、
詳しくは、フイルムのＴダイ法押出成形の際に生
ずるネツクインの拡大を防止すると共に冷却ロー
ルに対する樹脂の粘着を防止する製膜装置に関す
るものである。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a synthetic resin film forming apparatus,
More specifically, the present invention relates to a film forming apparatus that prevents the expansion of neck-in that occurs during T-die extrusion molding of a film and prevents resin from adhering to a cooling roll.
［従来の技術］
合成樹脂フイルムの押出成形法としては、イン
フレ法とＴダイ法がある。特に、Ｔダイ法の場
合、Ｔダイ直後に設けられる冷却ロールで、ネツ
クインを起こしやすい。ネツクインとはＴダイよ
り吐出された溶融樹脂のフイルムの両端が内側へ
収縮し、フイルムの巾が狭くなる現象である。そ
のネツクインを起こしたフイルムの両端部は厚み
が厚くなり、製品として使用することが出来ない
ためにその両端部をカツトする必要がある。この
ため相当量の樹脂のカツトがフイルム両端におい
て行なわれると共にフイルムの有効巾も狭くなる
ことから、原料の歩留りが悪く、生産効率が著し
く低下するという問題点がある。[Prior Art] Extrusion molding methods for synthetic resin films include an inflation method and a T-die method. In particular, in the case of the T-die method, neck-in tends to occur in the cooling roll provided immediately after the T-die. Neck-in is a phenomenon in which both ends of the molten resin film discharged from the T-die shrink inward, and the width of the film becomes narrower. Both ends of the film where the necking has occurred become thicker and cannot be used as a product, so it is necessary to cut off both ends. For this reason, a considerable amount of resin is cut at both ends of the film, and the effective width of the film is also narrowed, resulting in a problem that the yield of raw materials is poor and the production efficiency is significantly reduced.
このネツクイン防止対策として、従来は、溶融
樹脂がＴダイから吐出された直後、その溶融樹脂
のフイルムの両端に圧縮空気を吹きつけ、フイル
ムと冷却ロールとを強制的に密着させる方法が採
用されている。 As a measure to prevent this net-in, conventionally a method has been adopted in which compressed air is blown onto both ends of the molten resin film immediately after the molten resin is discharged from the T-die to force the film and the cooling roll into close contact. There is.
しかしながら、この方法ではフイルムに圧縮空
気を吹きつけた際、フイルムに含まれている可塑
剤等の油分が飛散し、霧状となつて環境が著しく
汚染されたり、フイルムの蛇行により圧縮空気の
吹きつけがフイルム両端をはずれる等の欠点があ
り、完全なネツクイン防止対策とは言えなかつ
た。 However, with this method, when compressed air is blown onto the film, oils such as plasticizers contained in the film may scatter and become mist, contaminating the environment significantly, or the film may meander, causing the compressed air to blow off. There were drawbacks such as the film coming off at both ends when attached, so it could not be said to be a complete measure to prevent net-in.
またネツクインを防止するためフイルム両端で
押えロールを用いて冷却する方法も知られている
（特開昭51−80364号参照）。 Also known is a method of cooling the film using pressure rolls at both ends to prevent neck-in (see Japanese Patent Laid-Open No. 80364/1983).
［発明が解決しようとする問題］
しかしこの方法では、単に押えロールで押え付
けるに過ぎないために、その押えロールの温度が
溶融樹脂温度の影響を受けて上昇し、溶融樹脂が
押えロールに巻きつく問題があつた。[Problem to be solved by the invention] However, in this method, since the presser roll is simply pressed, the temperature of the presser roll increases due to the influence of the molten resin temperature, and the molten resin is wound around the presser roll. I have a problem.
そこで、本発明は押えロールに溶融樹脂が巻き
つくのを防止できる合成樹脂フイルム製膜装置を
提供することを目的とする。 SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a synthetic resin film forming apparatus that can prevent molten resin from wrapping around a presser roll.
［課題を解決するための手段］
本発明者らは、上記課題を解決するため鋭意検
討した結果、Ｔダイより押出された合成樹脂フイ
ルムの両端部を押えロールにより冷却ロールに押
さえつけ、ネツクインの拡大を防止しながら冷却
固化する製膜装置において、該押えロールが冷却
水を用いることなくそれ自体放熱性を有する下記
(a)〜(d)の少なくとも１つの構造を有することを特
徴とする合成樹脂フイルム製膜装置によつて上記
課題を解決しうることを見い出し、本発明に至つ
た。[Means for Solving the Problems] As a result of intensive studies to solve the above problems, the present inventors have found that both ends of a synthetic resin film extruded from a T-die are pressed against a cooling roll by a presser roll to prevent the expansion of neck-in. In a film forming apparatus that cools and solidifies while preventing
The inventors have discovered that the above-mentioned problems can be solved by a synthetic resin film forming apparatus characterized by having at least one of the structures shown in (a) to (d), leading to the present invention.
(a) 押えロールの側面に放熱用の切欠きを有する
構造
(b) 押えロールがリングとシヤフトを複数のスポ
ークで保持する構造
(c) 押えロールの側面に多数の放熱板を有する構
造
(d) 押えロールの側面に羽根を取り付け、該押え
ロールが回転すると自らに風を吹きつける構造
以下、本発明の実施例を添付図面に基づき説明
する。(a) A structure in which the presser roll has a notch for heat radiation on the side surface (b) A structure in which the presser roll holds the ring and shaft with multiple spokes (c) A structure in which the presser roll has a large number of heat dissipation plates on the side surface (d) ) A structure in which a blade is attached to the side surface of a presser roll, and when the presser roll rotates, wind is blown onto itself.Embodiments of the present invention will be described below with reference to the accompanying drawings.
第１図および第２図は本発明の一実施例を示す
図であり、第１図はその側面図、第２図はその正
面図である。 1 and 2 are diagrams showing one embodiment of the present invention, with FIG. 1 being a side view thereof and FIG. 2 being a front view thereof.
同図において、合成樹脂フイルムＡがＴダイ１
から吐出された直後にその溶融樹脂フイルムの両
端２を回転軸５に取に付けられた押えロール３で
回転軸６に取り付けられた冷却ロール４に押さえ
つける。押さえつけられた溶融樹脂は、その部分
で冷却され、固化し、冷却ロール４に密着する。
その結果、溶融樹脂の収縮が冷却ロール４に密着
している部分で止まり、ネツクインがこれ以上拡
大することを防止する。 In the same figure, synthetic resin film A is T-die 1
Immediately after being discharged from the molten resin film, both ends 2 of the molten resin film are pressed against a cooling roll 4 attached to a rotating shaft 6 by a presser roll 3 attached to a rotating shaft 5. The pressed molten resin is cooled and solidified at that portion, and is brought into close contact with the cooling roll 4.
As a result, the shrinkage of the molten resin stops at the portion where it is in close contact with the cooling roll 4, and the neck-in is prevented from expanding further.
押えロール３は冷却水を用いることなく、それ
自体放熱性の高い構造を有している。 The presser roll 3 itself has a structure with high heat dissipation without using cooling water.
ここに「冷却水を用いることなく」とは、外部
から冷却水を押えロールに強制的に供給して冷却
水に熱移動させることではないことを意味する。
また「それ自体放熱性を有する」とは押えロール
の形態自体に基づいて放熱することを意味する。 Here, "without using cooling water" means that cooling water is not forcibly supplied to the presser roll from the outside to transfer heat to the cooling water.
Further, "having heat dissipating properties itself" means that heat is dissipated based on the shape of the presser roll itself.
放熱性の高い構造としては、上記(a)、(b)、(c)、
(d)の構造が挙げられる。 Structures with high heat dissipation include (a), (b), (c),
An example is the structure (d).
(a)の構造
上記(a)の構造は、押えロールの側面に放熱用の
切欠きを有する構造であり、具体的には第３図及
び第４図に示す構造である。Structure (a) The structure (a) above has a notch for heat dissipation on the side surface of the presser roll, and is specifically the structure shown in FIGS. 3 and 4.
即ち、押えロール３の肉厚は、放熱しやすくす
るため出来るだけ薄くして、押えロール３の側面
には切欠き７を多数設けてあり、それ自体放熱性
の高い構造によつて押えロール３の温度上昇を抑
えている。なお同図において８はベアリングであ
る。 That is, the wall thickness of the presser roll 3 is made as thin as possible in order to facilitate heat dissipation, and a number of notches 7 are provided on the side surface of the presser roll 3, which itself has a structure with high heat dissipation. temperature rise is suppressed. Note that in the figure, 8 is a bearing.
切欠き７の個数は図示に限定されず、また切欠
き７の形状も円形に限らず、等辺又は不等辺多角
形等であつてもよい。 The number of notches 7 is not limited to that illustrated, and the shape of the notches 7 is not limited to a circle, but may be an equilateral or scalene polygon.
(b)の構造
上記(b)の構造は、押えロールがリングとシヤフ
トを複数のスポークで保持する構造であり、具体
的には第５図に示す構造である。Structure of (b) The structure of (b) above is a structure in which a presser roll holds a ring and a shaft with a plurality of spokes, and specifically the structure is shown in FIG. 5.
即ち、本実施例は同図に示すように、リング９
とシヤフト１０を数本のスポーク１１で押えロー
ル３を保持する構造となつており、押えロールの
放熱をしやすくしている。 That is, in this embodiment, as shown in the figure, the ring 9
The shaft 10 has a structure in which the presser roll 3 is held by several spokes 11, making it easier to dissipate heat from the presser roll.
(c)の構造
上記(c)の構造は、押えロールの側面に多数の放
熱板を有する構造であり、具体的には第６図及び
第７図に示す構造である。Structure (c) The structure (c) above has a large number of heat sinks on the side surface of the presser roll, and specifically is the structure shown in FIGS. 6 and 7.
本実施例は押えロールの側面に金属の放熱板１
２をさし込み、いわゆるフイン状に構造してもの
で、これにより押えロールの温度上昇を防いでい
る。なお放熱板の形状は図示の形状に限定されな
いことはもとよりである。 In this embodiment, there is a metal heat sink 1 on the side of the presser roll.
2 is inserted and has a so-called fin-like structure, which prevents the presser roll from rising in temperature. Note that the shape of the heat sink is not limited to the shape shown in the drawings.
(d)の構造
上記(d)の構造は、押えロールの側面に羽根を取
り付け、該押えロールが回転すると自らに風を吹
きつける構造であり、具体的には第８図及び第９
図に示す構造である。Structure of (d) The structure of (d) above is a structure in which a blade is attached to the side of the presser roll, and when the presser roll rotates, it blows wind on itself.
This is the structure shown in the figure.
即ち、同図に示す例は、押えロールの側面に羽
根１３を取り付け、該押えロールが回転すると、
羽根１３も同時に回転し、扇風機の様に該押えロ
ールに風を送り、冷却する様になつている。 That is, in the example shown in the figure, the blade 13 is attached to the side surface of the presser roll, and when the presser roll rotates,
The blades 13 also rotate at the same time to send air to the presser roll like an electric fan to cool it.
外部から風を送る構造だが、押えロールと一体
化した羽根１３の動きに基づくものであり、「そ
れ自体放熱性を有する構造」に含まれる。 Although the structure blows air from outside, it is based on the movement of the blade 13 integrated with the presser roll, and is included in the "structure that itself has heat dissipation properties."
本発明においては上記(a)〜(d)の構造は二以上を
組み合わせることができる。 In the present invention, two or more of the above structures (a) to (d) can be combined.
上記構造を有する押えロール３の材質は、熱伝
導率が小さく、かつ耐熱性も優れているものが好
ましく、例えばテフロン樹脂、ナイロン樹脂、ポ
リイミド樹脂の如き合成樹脂類、セラミツクの如
き無機質等が挙げられる。 The material of the presser roll 3 having the above structure is preferably one having low thermal conductivity and excellent heat resistance, such as synthetic resins such as Teflon resin, nylon resin, and polyimide resin, and inorganic materials such as ceramics. It will be done.
又、上記構造を有する押えロール３の巾は、溶
融樹脂との接触面積を小さくして、伝熱量を少な
くするために、ネツクインの拡大を防止するのに
必要な最小の幅で良い。 Further, the width of the presser roll 3 having the above-mentioned structure may be the minimum width necessary to prevent the expansion of neck-in in order to reduce the contact area with the molten resin and the amount of heat transfer.
［発明の効果］
本発明は、上記した構成を有するので、両端部
のネツクインの拡大を防止できるだけでなく、特
に押えロールの温度上昇を防止できるので、溶融
樹脂が該押えロールに巻きつくという問題が解消
される。また冷却水を必要としないため、冷却水
供給設備を設ける必要がなく、コスト上昇を招か
ない。その結果、本発明によれば原料の歩留りを
良くすると共に低コストで生産効率を著しく向上
させることが出来る。[Effects of the Invention] Since the present invention has the above-described configuration, it is possible not only to prevent the expansion of neck-in at both ends, but also to prevent the rise in temperature of the presser roll, thereby solving the problem of molten resin wrapping around the presser roll. is resolved. Moreover, since no cooling water is required, there is no need to provide cooling water supply equipment, and no increase in cost is caused. As a result, according to the present invention, it is possible to improve the yield of raw materials and significantly improve production efficiency at low cost.
第１図および第２図は、本発明法の一実施例を
示す図であり、第１図はその側面図、第２図はそ
の正面図である。第３図は、押えロールの一実施
例を示す側面図、第４図は第３図の−線断面
図、第５図、第６図及び第８図は本発明に用いる
押えロールの他の実施例を示す側面図であり、第
７図は第６図の−線断面図、第９図は第８図
に示す実施例の正面図である。
図中、Ａは樹脂フイルム、１はＴダイ、２は樹
脂の両端、３は押えロール、４は冷却ロール、
５，６は回転軸、７は切欠き、８はベアリング、
９はリング、１０はシヤフト、１１はスポーク、
１２は放熱板、１３は羽根を各々示す。
1 and 2 are diagrams showing an embodiment of the method of the present invention, with FIG. 1 being a side view thereof and FIG. 2 being a front view thereof. FIG. 3 is a side view showing one embodiment of the presser roll, FIG. 4 is a sectional view taken along the line -- in FIG. 3, and FIGS. 7 is a side view showing the embodiment, FIG. 7 is a sectional view taken along the line -- in FIG. 6, and FIG. 9 is a front view of the embodiment shown in FIG. 8. In the figure, A is a resin film, 1 is a T-die, 2 is both ends of the resin, 3 is a press roll, 4 is a cooling roll,
5 and 6 are rotating shafts, 7 is a notch, 8 is a bearing,
9 is the ring, 10 is the shaft, 11 is the spoke,
Reference numeral 12 indicates a heat sink, and reference numeral 13 indicates a blade.
Claims (1)
端部を押えロールにより冷却ロールに押さえつ
け、ネツクインの拡大を防止しながら冷却固化す
る製膜装置において、該押えロールが冷却水を用
いることなくそれ自体放熱性を有する下記の(a)〜
(d)の少なくとも１つの構造を有することを特徴と
する合成樹脂フイルム製膜装置。 (a) 押えロールの側面に放熱用の切欠きを有する
構造 (b) 押えロールがリングとシヤフトを複数のスポ
ークで保持する構造 (c) 押えロールの側面に多数の放熱板を有する構
造 (d) 押えロールの側面に羽根を取り付け、該押え
ロールが回転すると自らに風を吹きつける構造[Claims] 1. In a film forming apparatus in which both ends of a synthetic resin film extruded from a T-die are pressed against a cooling roll by a presser roll and cooled and solidified while preventing the expansion of net-in, the presser roll allows the cooling water to flow through the film forming apparatus. The following (a) ~ have heat dissipation properties without using them
A synthetic resin film forming apparatus characterized by having at least one structure of (d). (a) A structure in which the presser roll has a notch for heat radiation on the side surface (b) A structure in which the presser roll holds the ring and shaft with multiple spokes (c) A structure in which the presser roll has a large number of heat dissipation plates on the side surface (d) ) A structure in which a blade is attached to the side of the presser roll, and when the presser roll rotates, it blows wind on itself.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59226762A JPS61106222A (en) | 1984-10-30 | 1984-10-30 | Manufacture device for synthetic resin film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59226762A JPS61106222A (en) | 1984-10-30 | 1984-10-30 | Manufacture device for synthetic resin film |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61106222A JPS61106222A (en) | 1986-05-24 |
| JPH0146305B2 true JPH0146305B2 (en) | 1989-10-06 |
Family
ID=16850214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59226762A Granted JPS61106222A (en) | 1984-10-30 | 1984-10-30 | Manufacture device for synthetic resin film |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61106222A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2960815B1 (en) * | 2010-06-02 | 2012-05-25 | Jean Pierre Darlet | COOLING ASSEMBLY OF A FILM OF SYNTHETIC MATERIAL |
| JP5762927B2 (en) * | 2011-11-07 | 2015-08-12 | 東洋鋼鈑株式会社 | Film manufacturing method and apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55105533A (en) * | 1979-02-07 | 1980-08-13 | Toray Ind Inc | Cooling method for polymer film |
-
1984
- 1984-10-30 JP JP59226762A patent/JPS61106222A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55105533A (en) * | 1979-02-07 | 1980-08-13 | Toray Ind Inc | Cooling method for polymer film |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61106222A (en) | 1986-05-24 |
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