JPH11207817A - Molding roll - Google Patents

Molding roll

Info

Publication number
JPH11207817A
JPH11207817A JP10011401A JP1140198A JPH11207817A JP H11207817 A JPH11207817 A JP H11207817A JP 10011401 A JP10011401 A JP 10011401A JP 1140198 A JP1140198 A JP 1140198A JP H11207817 A JPH11207817 A JP H11207817A
Authority
JP
Japan
Prior art keywords
roll
layer
metal
sheet
nickel
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
JP10011401A
Other languages
Japanese (ja)
Inventor
Hideaki Tanaka
秀明 田中
Koichi Kubo
晃一 久保
Haruyo Hashimoto
陽世 橋本
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.)
Sekisui Chemical Co Ltd
Original Assignee
Sekisui Chemical Co Ltd
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 Sekisui Chemical Co Ltd filed Critical Sekisui Chemical Co Ltd
Priority to JP10011401A priority Critical patent/JPH11207817A/en
Publication of JPH11207817A publication Critical patent/JPH11207817A/en
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To provide a molding roll absorbing and dispersing the fine thickness irregularity present on a synthetic resin sheet-like material being in a softened state in the lateral direction thereof in a mm unit in a shaping process and capable of applying pressing force sufficient to apply an uneven shape required in an optical function sheet to the sheet-like material highly accurately and capable of also applying high-order transparency and smoothness. SOLUTION: In a molding roll holding a synthetic resin sheet-like material being in a softened state between a pair of rolls comprising a metal shaping roll and a press roll under pressure, the press roll is formed by laminating a rubber layer being an intermediate layer and a metal film layer being an outer layer wherein a metal membrane based on chromium is formed on the outer peripheral surface of a metal tube based on nickel and formed by an electroforming method through a copper surface treatment layer to the outer periphery of a metal tube based on nickel and formed by an electroforming method through a copper surface treatment layer to the outer periphery of a shaft core part in this order.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、成形用ロールに関
し、更に詳しくは、レンズ形状及び表面平滑性に関する
精密性が要求されるフレネルレンズシート、レンチキュ
ラーレンズシート、プリズムレンズシート等の光学機能
シートの成形用ロールに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a molding roll, and more particularly, to an optical functional sheet such as a Fresnel lens sheet, a lenticular lens sheet, a prism lens sheet, etc., which require precision in lens shape and surface smoothness. It relates to a forming roll.

【0002】[0002]

【従来の技術】フレネルレンズシート、レンチキュラー
レンズシート、プリズムレンズシート等の光学機能シー
トは、1面にレンズ機能を発現する各種レンズ形状の凸
部が賦形され、他の面が平面からなり、該平面は光学的
に高度な平滑性(以下、鏡面性と称する)が要求され
る。
2. Description of the Related Art An optical function sheet such as a Fresnel lens sheet, a lenticular lens sheet, a prism lens sheet, etc. is formed with convex portions having various lens shapes exhibiting a lens function on one surface, and the other surface is flat. The plane is required to have a high degree of optical smoothness (hereinafter, referred to as specularity).

【0003】上記光学機能シートは、一般に、近年の金
型設計並びに加工技術の向上により厚さの精度が飛躍的
に向上したTダイ押出法によって押出されて軟化状態に
ある合成樹脂シート状体を、押出成形装置に一体的に組
み込まれた金属製エンボスロールと押圧ロールとからな
る成形用ロールによって挟圧することにより製造されて
いる。これらの押圧ロールとしては、表面研磨或いはメ
ッキ加工の精度を高めた金属ロールを用いるもの、内部
を鏡面化したロール型でシリコーンゴムを注型成形した
鏡面仕上げされたゴムロールを用いるもの、同様にフッ
素系樹脂熱収縮チューブを用いた鏡面仕上げされたフッ
素系樹脂ロールを用いるもの等が挙げられる。
[0003] The above-mentioned optical functional sheet is generally made of a synthetic resin sheet in a softened state extruded by a T-die extrusion method in which the accuracy of thickness has been dramatically improved due to recent improvements in mold design and processing techniques. It is manufactured by being pressed by a forming roll composed of a metal embossing roll and a pressing roll integrally incorporated in an extrusion forming apparatus. As these pressing rolls, those using metal rolls with improved surface polishing or plating precision, those using mirror-finished rubber rolls formed by casting silicone rubber with a roll type having a mirror-finished inside, and fluorine And a mirror-finished fluororesin roll using a heat-shrinkable resin tube.

【0004】しかしながら、光学的に高度な平滑性を求
められる上記光学機能シートを成形する際、押圧ロール
が金属ロールからなる場合には、これ自体が柔軟性を有
するものではないため、Tダイから押出されて軟化状態
にあるシート状体が有する幅方向ミリメートル単位で存
在する(即ち、近接する2点間に存在する)微小な厚さ
のムラを、自らの変形によって吸収する機能を持たな
い。即ち、賦形時に上記シート状体の厚さの厚い部分に
圧力が集中し、薄い部分の圧力が不足するため、凹凸の
賦形状態が不均一になる結果、部分的な光学性能のムラ
が発生するという不具合があった。
[0004] However, when the above-mentioned optical functional sheet is required to have a high degree of optical smoothness, if the pressing roll is made of a metal roll, it does not itself have flexibility. It does not have a function of absorbing, by its own deformation, minute thickness unevenness that exists in the width-wise millimeter unit (that is, exists between two adjacent points) of the extruded and softened sheet-like body. That is, pressure is concentrated on a thick portion of the sheet-shaped body at the time of shaping, and the pressure on the thin portion is insufficient. As a result, uneven shaping state of unevenness results in partial unevenness of optical performance. There was a problem that it occurred.

【0005】また、押圧ロールがシリコーンゴムからな
る場合には、鏡面仕上げのための注型硬化に際して、上
記樹脂組成物から発生するガス等によってゴム表面の微
小欠陥が不可避であり、このようにして製作された押圧
ロールによって賦形される凹凸面或いは平滑面には微細
な表面欠陥が転写され、部分的な光学性能の悪化を生じ
るという問題を有し、押圧ロールの寿命も安定した成形
を行うのに十分なものではない。
In the case where the pressing roll is made of silicone rubber, micro defects on the rubber surface are unavoidable due to gas or the like generated from the resin composition during casting and curing for mirror finishing. There is a problem that fine surface defects are transferred to the uneven surface or smooth surface formed by the manufactured pressing roll, causing a partial deterioration in optical performance, and the pressing roll has a stable life. Is not enough.

【0006】更に、押圧ロールの表面にフッ素系樹脂収
縮チューブが被覆されてなる場合においては、表面の研
磨仕上げに際して微細なスクラッチ傷による微細欠陥が
避けられず、やはり部分的な光学欠陥の原因となるもの
である。
Further, in the case where the surface of the pressing roll is covered with a fluororesin shrink tube, fine defects due to fine scratches are inevitable in polishing and polishing the surface, which also causes partial optical defects. It becomes.

【0007】こうした押圧ロールによる成型シートの透
明性や平滑性の阻害要因を取り除く試みとして、特開昭
62−132619号公報に、互いに平行に配置された
金属ロールと弾性ロールとからなり、弾性ロールは弾性
層と金属の筒体とを有し筒体が弾性層にその外側周面に
密着して嵌込まれているとともにこの筒体の外表面に硬
質メッキ層が設けられている高分子材料からなるシート
の製造用ロール装置が開示されている。
Japanese Patent Application Laid-Open No. 62-132719 discloses an attempt to remove the factors that impede the transparency and smoothness of a molded sheet by such a pressing roll, which comprises a metal roll and an elastic roll arranged in parallel with each other. Is a polymer material having an elastic layer and a metal cylinder, the cylinder being closely fitted to the outer peripheral surface of the elastic layer, and a hard plating layer being provided on the outer surface of the cylinder. A roll device for manufacturing a sheet comprising:

【0008】しかしながら、特開昭62−132619
号公報に開示されたロール装置を用いて、上記光学機能
シートを作製しても、賦形状態の不均一さは改善され
ず、また、透明性や平滑性は、多少改善されたとしても
上記光学機能シートに要求される高度の透明性や平滑性
には到底及ぶべきもないものである。
[0008] However, Japanese Patent Application Laid-Open No. 62-132719.
Using the roll device disclosed in the above publication, even if the optical functional sheet is produced, the non-uniformity of the shaped state is not improved, and the transparency and smoothness are improved even if the properties are somewhat improved. There is no need to reach the high degree of transparency and smoothness required for the optical function sheet.

【0009】[0009]

【発明が解決しようとする課題】本発明は、叙上の事実
に鑑みなされたものであって、その目的とするところ
は、軟化状態にある合成樹脂シート状体の幅方向の微細
な厚さムラを賦形過程において吸収分散させると同時
に、光学機能シートに要求される凹凸形状を該シート状
体に高精度に賦形するに十分な押圧力を与え得るもので
あり、加えて、高度の透明性や平滑性をも付与せしめ得
る成形用ロールを提供することにある。
SUMMARY OF THE INVENTION The present invention has been made in view of the above facts, and an object of the present invention is to provide a soft resin sheet having a fine thickness in the width direction. At the same time as absorbing and dispersing the unevenness in the shaping process, it is possible to apply a sufficient pressing force to shape the unevenness required for the optical functional sheet with high accuracy on the sheet-like body. An object of the present invention is to provide a molding roll capable of imparting transparency and smoothness.

【0010】上記目的を達成するため、金属製賦形ロー
ルと押圧ロールとからなる一対の成形用ロールについて
鋭意研究した結果、電気鋳造法で作製されたニッケルを
主成分とする金属チューブの外周面に、銅の表面処理層
を介してクロムを主成分とする金属薄膜を形成した金属
被膜層を中間層のゴム部上に形成せしめた押圧ロールを
用いることによって達成し得ることを知見し、本発明を
完成するに至った。
In order to achieve the above object, as a result of intensive studies on a pair of forming rolls composed of a metal shaping roll and a pressing roll, the outer peripheral surface of a nickel-based metal tube made by electroforming has been studied. It was found that this can be achieved by using a pressing roll in which a metal coating layer formed of a metal thin film containing chromium as a main component via a copper surface treatment layer was formed on the rubber portion of the intermediate layer. The invention has been completed.

【0011】[0011]

【課題を解決するための手段】本発明は、軟化状態にあ
る合成樹脂シート状体を、金属製賦形ロールと押圧ロー
ルとからなる一対のロール間に挟圧してシート成形する
ための成形用ロールであって、上記押圧ロールが、軸芯
部の外周に中間層としてのゴム層と、ニッケルを主成分
とし電気鋳造法で作製された金属チューブの外周面に、
銅の表面処理層を介してクロムを主成分とする金属薄膜
が形成された外層としての金属被膜層がこの順に積層さ
れてなることを特徴とする成形用ロールである。
SUMMARY OF THE INVENTION The present invention provides a molding method for forming a sheet by pressing a softened synthetic resin sheet between a pair of rolls comprising a metal shaping roll and a pressing roll. A roll, wherein the pressing roll has a rubber layer as an intermediate layer on the outer periphery of the shaft core, and an outer peripheral surface of a metal tube made of nickel as a main component by electroforming.
A forming roll characterized in that a metal coating layer as an outer layer in which a metal thin film containing chromium as a main component is formed via a copper surface treatment layer is laminated in this order.

【0012】本発明で用いられる押圧ロールの軸芯部
は、如何なる材質からなるものであってもよいが、例え
ば鉄製ロール軸芯部が挙げられる。上記軸芯部には、そ
の内部に温度制御装置と該装置に供給される熱媒等の流
路が設けられていてもよい。
The shaft core of the pressing roll used in the present invention may be made of any material, for example, an iron roll shaft core. The shaft core may be provided therein with a temperature control device and a flow path for a heating medium or the like supplied to the device.

【0013】上記押圧ロールの中間層を構成するゴム部
は、弾性と適度の耐熱性を有するものであれば特に限定
されるものではなく、例えば、クロロプレンゴム、シリ
コーンゴム等が挙げられる。これらのゴムの硬度は、J
IS Z 2246に規定されるショアーA硬度で好ま
しくは60°〜90°であり、ゴム硬度を調整するため
に充填剤が配合されてもよい。また、上記ゴム層の厚さ
は0.5mm以上であることが好ましい。上記ゴム層の
厚さが0.5mm未満ではゴム層の弾性変形量が小さく
なり、合成樹脂シート状体の厚さムラを十分に吸収し得
ないおそれがある。
The rubber portion constituting the intermediate layer of the pressing roll is not particularly limited as long as it has elasticity and appropriate heat resistance, and examples thereof include chloroprene rubber and silicone rubber. The hardness of these rubbers is J
The Shore A hardness specified in ISZ 2246 is preferably 60 ° to 90 °, and a filler may be blended to adjust the rubber hardness. The thickness of the rubber layer is preferably 0.5 mm or more. If the thickness of the rubber layer is less than 0.5 mm, the amount of elastic deformation of the rubber layer becomes small, and it may not be possible to sufficiently absorb the thickness unevenness of the synthetic resin sheet.

【0014】上記軸芯部へのゴム部の積層は、特に限定
されるものではなく、通常、ゴムロールの製作に際して
用いられるゴム巻き等の公知の方法が適用され得る。
The lamination of the rubber portion on the shaft core is not particularly limited, and a known method such as a rubber winding usually used for producing a rubber roll can be applied.

【0015】上記押圧ロールの外層を構成する金属被膜
層は、電気鋳造法で作製されたニッケルを主成分とする
金属チューブ(以下、ニッケルチューブと略称する)の
表面に、銅の表面処理層を介して、クロムを主成分とす
る金属薄膜(以下、クロム薄膜と略称する)が形成され
てなるものである。上記ニッケルチューブの厚さは0.
03〜0.3mmが好ましい。上記ニッケルチューブの
厚さが0.03mm未満では機械的強度が小さくなり、
使用時に挟圧力設定に制限が生じたり、不意の負荷によ
って破損のおそれがあり、0.3mmを超えると押圧ロ
ール表面の柔軟性が低下し、合成樹脂シート状体の厚さ
ムラを十分に吸収し得ないおそれがある。
The metal coating layer constituting the outer layer of the pressing roll is formed by forming a copper surface treatment layer on a surface of a metal tube mainly composed of nickel (hereinafter abbreviated as a nickel tube) manufactured by an electroforming method. Through this, a metal thin film containing chromium as a main component (hereinafter abbreviated as chromium thin film) is formed. The thickness of the nickel tube is 0.
03 to 0.3 mm is preferred. If the thickness of the nickel tube is less than 0.03 mm, the mechanical strength becomes small,
There is a possibility that the setting of the clamping pressure may be restricted during use or there is a risk of breakage due to an unexpected load. If it exceeds 0.3 mm, the flexibility of the pressing roll surface decreases, and the thickness unevenness of the synthetic resin sheet is sufficiently absorbed May not be possible.

【0016】また、クロム被膜の厚さは、好ましくは
0.01〜0.1mmである。上記クロム被膜の厚さが
0.01mm未満では合成樹脂シート表面を押圧する剛
性が低下し、得られる光学機能シートの平滑性が十分に
付与されないおそれがあり、0.1mmを超えると上記
ニッケルチューブとの密着力が低下し、クロム薄膜が剥
離するおそれがある。
Further, the thickness of the chromium coating is preferably 0.01 to 0.1 mm. If the thickness of the chromium coating is less than 0.01 mm, the rigidity of pressing the surface of the synthetic resin sheet is reduced, and the smoothness of the obtained optical functional sheet may not be sufficiently provided. The chromium thin film may peel off.

【0017】上記電気鋳造法によるニッケルチューブと
クロム薄膜の中間には銅の表面処理層が介在する。該銅
の表面処理層は、これが介在しない場合の上記押圧ロー
ル製作時におけるニッケルチューブとクロム薄膜の収縮
応力の差による歪みに起因して無数のピンホール等がク
ロム薄膜表面に生じることを抑止する機能を有する。上
記銅の表面処理手段は特に限定されるものではないが、
例えば、湿式メッキ法が好適に用いられる。上記銅の表
面処理薄膜の厚さは、好ましくは0.05〜1μmであ
る。上記銅の表面処理薄膜の厚さが0.05μm未満で
は、ニッケルチューブとクロム被膜の収縮応力の差によ
る歪みの吸収が十分に行われず、1μmを超える場合は
コストを増大するだけである。
A surface treatment layer of copper is interposed between the nickel tube and the chromium thin film formed by the electroforming method. The copper surface treatment layer prevents countless pinholes and the like from being formed on the surface of the chromium thin film due to distortion caused by a difference in contraction stress between the nickel tube and the chromium thin film when the pressing roll is not formed. Has functions. The copper surface treatment means is not particularly limited,
For example, a wet plating method is preferably used. The thickness of the copper surface-treated thin film is preferably 0.05 to 1 μm. When the thickness of the copper surface-treated thin film is less than 0.05 μm, the strain caused by the difference in contraction stress between the nickel tube and the chromium film is not sufficiently absorbed. When the thickness exceeds 1 μm, the cost is only increased.

【0018】上記金属被膜層の作製手段は、例えば、円
筒状の母型を用いて電気鋳造法によるニッケルチューブ
を作製し、連続して湿式メッキ法により該ニッケルチュ
ーブ上に銅による表面処理を施し、更に、時間をおかず
直ちに、銅の表面処理層上にクロム薄膜を形成する方法
が挙げられる。上記連続的金属被膜層の作製方法は、各
層間の密着性を高め、且つ、クロム薄膜の微細な表面欠
陥の発生を防止する点において好ましい方法である。
The metal coating layer is formed, for example, by preparing a nickel tube by an electroforming method using a cylindrical matrix, and subjecting the nickel tube to a surface treatment with copper by a wet plating method. Further, there is a method of forming a chromium thin film on a copper surface treatment layer immediately without any time. The method for producing the continuous metal coating layer is a preferable method in that the adhesion between the layers is enhanced and the occurrence of minute surface defects of the chromium thin film is prevented.

【0019】上記ゴム層への金属被膜層の積層手段は、
特に限定されるものではないが、例えば、上記ゴム層を
冷却して収縮させてチューブ状の金属被膜層を外挿した
後、常温に戻して密着固定する方法、上記軸芯部と金属
被膜層を予め位置決めしておき、両者の間隙に液状ゴム
を注入した後、硬化させて中間層のゴム層を形成する方
法等が挙げられる。上記のようにして得られた押圧ロー
ルは、外層の金属被膜層のクロム薄膜にバーチカル研磨
を施す等、鏡面性を更に向上させてもよい。
The means for laminating the metal coating layer on the rubber layer is as follows:
Although not particularly limited, for example, a method of cooling and shrinking the rubber layer, extrapolating the tube-shaped metal coating layer, returning the temperature to room temperature, and fixing it tightly, the shaft core portion and the metal coating layer Are positioned in advance, and a liquid rubber is injected into a gap between the two, and then cured to form an intermediate rubber layer. The pressing roll obtained as described above may further improve the mirror finish, for example, by subjecting the chromium thin film of the outer metal coating layer to vertical polishing.

【0020】本発明の成形用ロールは、叙上のように押
圧ロールが表面の平滑性、柔軟性に優れた電気鋳造法に
よるニッケルを主成分とする金属チューブが用いられて
いるので、中間層を形成するゴム層とともに、押出され
た合成樹脂シート状体の幅方向ミリメートル単位に発生
する微細な厚さのバラツキを、押圧ロールの変形によっ
て吸収することができるとともに、最外層の剛性に富ん
だクロムを主成分とする金属薄膜が有する、鏡面仕上げ
された表面の平滑性を転写賦形することができ、且つ、
上記両金属層が直接接触した場合に各々の収縮応力の違
いによって生ずる歪みが上記両金属層間に介在する銅の
表面処理層によって遮断され、上記クロム薄膜に微細な
ピンホール等の表面欠陥の発生を防止することができる
から、光学的に優れた光学機能シートを効率的に生産し
得るものである。
In the forming roll of the present invention, as described above, since the pressing roll uses a metal tube mainly composed of nickel by an electroforming method having excellent surface smoothness and flexibility, the intermediate layer is used. Along with the rubber layer that forms the fine synthetic resin sheet, the variation in the fine thickness that occurs in the width direction in millimeters can be absorbed by the deformation of the pressing roll, and the outermost layer is rich in rigidity. The metal thin film containing chromium as a main component can transfer and shape the smoothness of the mirror-finished surface, and
When the two metal layers come into direct contact with each other, the distortion caused by the difference in the contraction stress is interrupted by the copper surface treatment layer interposed between the two metal layers, and the occurrence of surface defects such as fine pinholes in the chromium thin film occurs. Therefore, an optically excellent optically functional sheet can be efficiently produced.

【0021】[0021]

【発明の実施の形態】以下、本発明の実施例を説明す
る。
Embodiments of the present invention will be described below.

【0022】(実施例1)図1に示すように、内部に図
示しない4条スパイラル構造の熱媒流路を設けた軸芯部
1を鋼材S45Cを用いて作製し、該軸芯部1の外周面
に、ニトリルゴム(NBR)を被覆し硬化した後、研磨
してショアーA硬度85°、外径250mm、厚さ2m
mのゴム層2を形成した。一方、電気鋳造法によって内
径250mm、厚さ0.2mmのニッケルチューブ31
を作製し、その外周面に湿式メッキ法によって厚さ0.
5μmの銅の表面処理層32を形成し、更に、湿式メッ
キ法によって厚さ0.05mmのクロム薄膜33を上記
表面処理層上に形成して金属被膜層を作製した。次に、
軸芯部1に積層されたゴム層2を冷却して収縮させ、上
記チューブ状の金属被膜層を外挿した後、常温に戻して
上記ゴム層2上に金属被膜層3を密着固定した後、#4
000バフを用いてクロム薄膜33表面を研磨して鏡面
仕上げして面長1000mmの押圧ロールを製作した。
(Embodiment 1) As shown in FIG. 1, a shaft core 1 provided with a heating medium flow path having a four-row spiral structure (not shown) was manufactured using a steel material S45C. The outer peripheral surface is coated with nitrile rubber (NBR), cured, polished, and polished to a Shore A hardness of 85 °, an outer diameter of 250 mm, and a thickness of 2 m.
m of the rubber layer 2 was formed. On the other hand, a nickel tube 31 having an inner diameter of 250 mm and a thickness of 0.2 mm is formed by electroforming.
Is formed on the outer peripheral surface by a wet plating method.
A 5 μm copper surface treatment layer 32 was formed, and a 0.05 mm thick chromium thin film 33 was formed on the surface treatment layer by wet plating to form a metal coating layer. next,
After cooling and shrinking the rubber layer 2 laminated on the shaft core portion 1, extrapolating the tubular metal coating layer, returning the temperature to room temperature, and tightly fixing the metal coating layer 3 on the rubber layer 2. , # 4
The surface of the chrome thin film 33 was polished and mirror-finished using a 000 buff to produce a pressing roll having a surface length of 1000 mm.

【0023】レンズシート成形用凹凸が表面に彫刻され
た鋼製賦形ロールを上記押圧ロールと対にしてTダイ押
出成形装置に組み込み、該装置を用いて、押出温度27
0℃にて押出されたポリカーボネート樹脂シート状体を
成形し、厚さ200μmのレンズシートを得た。なお、
賦形ロールの表面温度はその中に設けられた熱媒流路に
130℃の熱媒を循環して制御し、押圧ロールの表面温
度はその中に設けられた熱媒流路に30℃の熱媒を循環
して制御した。
A steel shaping roll having a surface engraved with the concave and convex for forming a lens sheet is incorporated in a T-die extrusion molding apparatus in a pair with the above-mentioned pressing roll, and the extrusion temperature is set to 27 using the apparatus.
The polycarbonate resin sheet extruded at 0 ° C. was molded to obtain a lens sheet having a thickness of 200 μm. In addition,
The surface temperature of the shaping roll is controlled by circulating a 130 ° C. heat medium through a heat medium passage provided therein, and the surface temperature of the pressing roll is 30 ° C. through a heat medium passage provided therein. The heating medium was circulated and controlled.

【0024】(比較例1)実施例1の金属被膜層に代え
て、電気鋳造法によって内径250mm、厚さ0.2m
mのニッケルチューブを作製し、その表面に直接に湿式
メッキ法によって厚さ0.05mmのクロム薄膜を形成
して金属被膜層を作製したこと以外実施例1と同様にし
て押圧ロールを製作し、ポリカーボネート樹脂製レンズ
シートを成形した。
(Comparative Example 1) An inner diameter of 250 mm and a thickness of 0.2 m were obtained by electroforming instead of the metal coating layer of Example 1.
m, and a press roll was manufactured in the same manner as in Example 1 except that a chromium thin film having a thickness of 0.05 mm was directly formed on the surface of the nickel tube by a wet plating method to form a metal coating layer. A polycarbonate resin lens sheet was formed.

【0025】(比較例2)実施例1の押圧ロールに代え
て、外径250mmの鋼(S45C)製ロール表面にク
ロムメッキを施し、鏡面仕上げされた鋼製押圧ロールを
用いたこと以外実施例1と同様にしてポリカーボネート
樹脂製レンズシートを成形した。
COMPARATIVE EXAMPLE 2 Instead of using the pressing roll of Example 1, a steel pressing roll having a mirror-finished steel surface by applying a chrome plating to the surface of a steel (S45C) roll having an outer diameter of 250 mm was used. In the same manner as in Example 1, a polycarbonate resin lens sheet was formed.

【0026】(比較例3)実施例の押圧ロールに替え
て、鋼(S45C)製ロール表面に厚さ2mmのシリコ
ーンゴムを注型硬化させて被覆した外径250mmφの
鏡面ゴム押圧ロールを用いたこと以外実施例1と同様に
してポリカーボネート樹脂製レンズシートを成形した。
(Comparative Example 3) Instead of the pressing roll of the example, a mirror rubber pressing roll having an outer diameter of 250 mmφ was used in which a steel (S45C) roll surface was cast and hardened with a 2 mm thick silicone rubber to cover the surface. Except for this, a polycarbonate resin lens sheet was formed in the same manner as in Example 1.

【0027】(比較例4)実施例1の金属被膜層に代え
て、フッ素系樹脂製熱収縮性チューブを被覆した後熱収
縮させ、更に研磨によって鏡面化した外径250mmの
鏡面フッ素系樹脂押圧ロールを用いたこと以外実施例1
と同様にしてポリカーボネート樹脂製レンズシートを成
形した。
(Comparative Example 4) In place of the metal coating layer of Example 1, a fluororesin heat-shrinkable tube was coated, heat-shrinked, and then mirror-finished by polishing. Example 1 except that a roll was used
A polycarbonate resin lens sheet was formed in the same manner as described above.

【0028】(比較例5)実施例1の金属被膜層に代え
て、電気鋳造法によって作製した内径250mm、厚さ
0.2mmのニッケルチューブをそのまま金属被膜層と
したこと以外は実施例1と同様にして押圧ロールを製作
し、ポリカーボネート樹脂製レンズシートを成形した。
(Comparative Example 5) The procedure of Example 1 was repeated except that a nickel tube having an inner diameter of 250 mm and a thickness of 0.2 mm produced by an electroforming method was used as a metal layer instead of the metal layer of Example 1. Similarly, a pressing roll was manufactured, and a polycarbonate resin lens sheet was formed.

【0029】得られたレンズシートの性能を評価するた
め、以下に示す項目について、各々に示す試験方法によ
って試験した。試験結果は表1に示す。
In order to evaluate the performance of the obtained lens sheet, the following items were tested by the test methods shown below. The test results are shown in Table 1.

【0030】1.凹凸形状の転写均一性:転写賦形され
た凹凸部分をシートの幅方向にランダムに10箇所選
び、その横断面を顕微鏡で400倍に拡大して観察し、
○:賦形ロール凹凸通りに均一に転写賦形されており無
欠陥であるもの、△:均一な押圧がなされず、転写不良
部分が散見されるもの、×:転写不良が甚だしいもの、
の3段階で評価した。
1. Transfer uniformity of the uneven shape: Transfer-shaped uneven portions are randomly selected at 10 places in the width direction of the sheet, and the cross section thereof is observed with a microscope at a magnification of 400 times.
:: A sample that is uniformly transferred and shaped according to the shape of the shaping roll and has no defect, △: A sample in which uniform pressing is not performed, and a defective transfer portion is scattered, and X: A sample in which transfer defect is extremely severe,
Was evaluated in three steps.

【0031】2.鏡面平滑性:JIS B 0601に
準拠して、押圧ロール表面の中心線平均粗さ(Ra)を
表面粗さ計を用いて測定した。
2. Mirror smoothness: The center line average roughness (Ra) of the pressing roll surface was measured using a surface roughness meter in accordance with JIS B0601.

【0032】3.欠陥数:押圧ロール表面に生じたピン
ホール、突起、陥没等の微欠陥を目視により観察し計数
した。
3. Number of defects: Fine defects such as pinholes, protrusions, and depressions generated on the pressing roll surface were visually observed and counted.

【0033】4.押圧ロールの寿命:実施例1に記載の
条件でレンズシートを連続的に生産し、製品又は押圧ロ
ールの初期に存在したものとは異なる欠陥が継続的に発
生するまでの累積時間を測定した。
4. Life of press roll: The lens sheet was continuously produced under the conditions described in Example 1, and the accumulated time until the occurrence of a defect different from that of the product or the press roll at the initial stage was measured.

【0034】5.異物による欠陥発生の有無:押圧ロー
ル表面に付着した異物によって押圧ロール機能に欠陥を
発生せしめたか否かを目視により観察し、○:欠陥発生
なし、×:欠陥発生のあったもの、の2段階で評価し
た。
5. Presence / absence of defects due to foreign matter: visually observed whether or not a foreign matter adhered to the surface of the press roll caused a defect in the press roll function. Was evaluated.

【0035】6.総合評価:得られたレンズシートの品
質、製作された押圧ロールの初期品質及びレンズシート
生産時、経時における押圧ロールの品質を総合して評価
し、○:高度精密成形が可能であると評価できるもの、
×:評価できないもの、の2段階で判定した。
6. Comprehensive evaluation: The quality of the obtained lens sheet, the initial quality of the manufactured pressing roll, and the quality of the pressing roll over time during the production of the lens sheet are evaluated comprehensively. ○: It can be evaluated that highly precise molding is possible. thing,
X: Evaluation was not possible in two stages.

【0036】[0036]

【表1】 [Table 1]

【0037】[0037]

【発明の効果】本発明の成形用ロールは、叙上のように
構成されているので、押出された合成樹脂シート状体の
幅方向ミリメートル単位で存在する微細な厚さムラを吸
収しながら均一化された圧力で挟圧することによって、
賦形ロールの凹凸が忠実にシート状体に転写賦形され
て、高度に精密成形された光学機能シート等の成形シー
トを安価に連続生産し得るものである。
Since the molding roll of the present invention is constituted as described above, it can be made uniform while absorbing fine thickness unevenness existing in units of millimeters in the width direction of the extruded synthetic resin sheet. By pinching with the pressure
The irregularities of the shaping roll are faithfully transferred and shaped into a sheet-like body, so that a highly precise molded sheet such as an optical functional sheet can be continuously produced at low cost.

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

【図1】本発明の成形用ロールの押圧ロールの一例を示
す断面図である。
FIG. 1 is a sectional view showing an example of a pressing roll of a forming roll of the present invention.

【符号の説明】[Explanation of symbols]

1:軸芯部 2:ゴム層 3:金属被膜層 31:ニッケルチューブ 32:銅の表面処理層 33:クロム薄膜 1: Shaft core 2: Rubber layer 3: Metal coating layer 31: Nickel tube 32: Copper surface treatment layer 33: Chrome thin film

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 軟化状態にある合成樹脂シート状体を、
金属製賦形ロールと押圧ロールとからなる一対のロール
間に挟圧してシート成形するための成形用ロールであっ
て、上記押圧ロールが、軸芯部の外周に中間層としての
ゴム層と、ニッケルを主成分とし電気鋳造法で作製され
た金属チューブの外周面に、銅の表面処理層を介してク
ロムを主成分とする金属薄膜が形成された外層としての
金属被膜層がこの順に積層されてなることを特徴とする
成形用ロール。
1. A synthetic resin sheet in a softened state,
A forming roll for forming a sheet by pressing between a pair of rolls consisting of a metal shaping roll and a pressing roll, wherein the pressing roll has a rubber layer as an intermediate layer on the outer periphery of a shaft core, A metal coating layer as an outer layer in which a metal thin film containing chromium as a main component is formed via a copper surface treatment layer on an outer peripheral surface of a metal tube made of nickel as a main component by an electroforming method and laminated in this order. A forming roll characterized in that it comprises:
JP10011401A 1998-01-23 1998-01-23 Molding roll Pending JPH11207817A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10011401A JPH11207817A (en) 1998-01-23 1998-01-23 Molding roll

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10011401A JPH11207817A (en) 1998-01-23 1998-01-23 Molding roll

Publications (1)

Publication Number Publication Date
JPH11207817A true JPH11207817A (en) 1999-08-03

Family

ID=11777005

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10011401A Pending JPH11207817A (en) 1998-01-23 1998-01-23 Molding roll

Country Status (1)

Country Link
JP (1) JPH11207817A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004526273A (en) * 2001-02-16 2004-08-26 ゼネラル・エレクトリック・カンパニイ Low birefringence plastic film and sheet manufacturing equipment
US7811218B2 (en) 2005-09-22 2010-10-12 Toshiba Kikai Kabushiki Kaisha Sheet or film-forming roll
US7846367B2 (en) 2005-12-27 2010-12-07 Toshiba Kikai Kabushiki Kaisha Sheet or film-forming roll, sheet or film-forming apparatus and crowning control method
US8070468B2 (en) 2008-05-28 2011-12-06 Toshiba Kikai Kabushiki Kaisha Sheet film forming roll, sheet film casting apparatus, fine pattern transferring apparatus and sheet film
US8182256B2 (en) 2006-12-11 2012-05-22 Toshiba Kikai Kabushiki Kaisha Sheet or film forming roll, sheet or film casting apparatus, and miniature pattern transferring apparatus
US8297965B2 (en) 2008-05-28 2012-10-30 Toshiba Kikai Kabushiki Kaisha Touch roll, main roll, sheet film casting apparatus, fine pattern transferring apparatus and sheet film

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62132619A (en) * 1985-12-04 1987-06-15 Showa Bussan Kk Manufacture roll device for sheet composed of high-molecular weight material
JPS63105198A (en) * 1986-10-17 1988-05-10 株式会社 フツカクロ−ム Roll for surface processing of sheet material and its production
JPH05240238A (en) * 1992-02-24 1993-09-17 Samitsukusu:Kk Manufacture of fiber reinforced resin roll
JPH0748691A (en) * 1993-08-05 1995-02-21 Ricoh Co Ltd Seamless flexible endless member and producing device therefor
JPH07214726A (en) * 1994-02-03 1995-08-15 Toray Ind Inc Composite cylinder and production thereof
JPH07309495A (en) * 1994-03-23 1995-11-28 Mitsubishi Paper Mills Ltd Surface metallic carbon roller and manufacture thereof
JPH10249916A (en) * 1997-03-14 1998-09-22 Sekisui Chem Co Ltd Roll for extrusion sheet-forming

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS62132619A (en) * 1985-12-04 1987-06-15 Showa Bussan Kk Manufacture roll device for sheet composed of high-molecular weight material
JPS63105198A (en) * 1986-10-17 1988-05-10 株式会社 フツカクロ−ム Roll for surface processing of sheet material and its production
JPH05240238A (en) * 1992-02-24 1993-09-17 Samitsukusu:Kk Manufacture of fiber reinforced resin roll
JPH0748691A (en) * 1993-08-05 1995-02-21 Ricoh Co Ltd Seamless flexible endless member and producing device therefor
JPH07214726A (en) * 1994-02-03 1995-08-15 Toray Ind Inc Composite cylinder and production thereof
JPH07309495A (en) * 1994-03-23 1995-11-28 Mitsubishi Paper Mills Ltd Surface metallic carbon roller and manufacture thereof
JPH10249916A (en) * 1997-03-14 1998-09-22 Sekisui Chem Co Ltd Roll for extrusion sheet-forming

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004526273A (en) * 2001-02-16 2004-08-26 ゼネラル・エレクトリック・カンパニイ Low birefringence plastic film and sheet manufacturing equipment
US7811218B2 (en) 2005-09-22 2010-10-12 Toshiba Kikai Kabushiki Kaisha Sheet or film-forming roll
US8241192B2 (en) 2005-09-22 2012-08-14 Toshiba Kikai Kabushiki Kaisha Sheet or film-forming roll
US7846367B2 (en) 2005-12-27 2010-12-07 Toshiba Kikai Kabushiki Kaisha Sheet or film-forming roll, sheet or film-forming apparatus and crowning control method
US8182256B2 (en) 2006-12-11 2012-05-22 Toshiba Kikai Kabushiki Kaisha Sheet or film forming roll, sheet or film casting apparatus, and miniature pattern transferring apparatus
US8070468B2 (en) 2008-05-28 2011-12-06 Toshiba Kikai Kabushiki Kaisha Sheet film forming roll, sheet film casting apparatus, fine pattern transferring apparatus and sheet film
US8297965B2 (en) 2008-05-28 2012-10-30 Toshiba Kikai Kabushiki Kaisha Touch roll, main roll, sheet film casting apparatus, fine pattern transferring apparatus and sheet film

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