JPH07148751A - Sheet manufacturing method and manufacturing apparatus - Google Patents
Sheet manufacturing method and manufacturing apparatusInfo
- Publication number
- JPH07148751A JPH07148751A JP5321078A JP32107893A JPH07148751A JP H07148751 A JPH07148751 A JP H07148751A JP 5321078 A JP5321078 A JP 5321078A JP 32107893 A JP32107893 A JP 32107893A JP H07148751 A JPH07148751 A JP H07148751A
- Authority
- JP
- Japan
- Prior art keywords
- pressure roll
- curable resin
- base member
- molding die
- sheet
- 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
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
(57)【要約】
【目的】 気泡の混入がなく、ベース部材上に形成され
る樹脂の厚さが一様なシートの製造方法及びその製造装
置を提供する。
【構成】 ベース部材上に反応硬化性樹脂からなるフレ
ネルレンズ等の微細パターン部を形成してなるシートの
製造工程において、成形型に塗布された反応硬化性樹脂
上にベース部材を載せ、その上から加圧ロールで加圧を
行う際、中央部の径と両端部の径が異なる加圧ロールを
用いて反応硬化性樹脂を均しながら加圧して樹脂上にベ
ース部材を積層する。
(57) [Abstract] [PROBLEMS] To provide a method of manufacturing a sheet and a manufacturing apparatus thereof, in which bubbles are not mixed and a resin formed on a base member has a uniform thickness. [Structure] In a manufacturing process of a sheet in which a fine pattern portion such as a Fresnel lens made of a reaction-curable resin is formed on a base member, the base member is placed on the reaction-curable resin applied to a molding die, When the pressure is applied by the pressure rolls, the pressure curable rolls having different diameters at the central portion and at the opposite end portions are used to evenly press the reaction curable resin to laminate the base member on the resin.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、透過型スクリーン等に
使用されるフレネルレンズシート、プリズムレンズシー
トのようなシートの製造方法及び製造装置に関し、特
に、レンズ形状等の微細パターン部を反応硬化性樹脂を
用いて成形するシートの製造方法及び製造装置に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for manufacturing sheets such as Fresnel lens sheets and prism lens sheets used for transmission screens, etc. TECHNICAL FIELD The present invention relates to a method and an apparatus for manufacturing a sheet molded using a resin.
【０００２】[0002]
【従来の技術】従来より、ベース部材上に、反応硬化性
樹脂からなるプリズムレンズ、フレネルレンズなどの微
細パターン部を形成してなるシートが知られている。こ
れらのシートは、その製造工程の中で、成形型に塗布さ
れた反応硬化性樹脂上にベース部材を載せ、その上か
ら、円筒状の加圧ロールで加圧する工程を含むことで成
形することができる。図３と図４は従来のシートの製造
方法におけるベース部材積層工程を模式的に示す図であ
る。反応硬化性樹脂に紫外線または電子線等の電離放射
線で硬化する樹脂を用いた場合には、所望の微細パター
ンと逆の形状の微細パターンが形成された成形型３上に
電離放射線硬化樹脂２を塗布したのち、ベース部材１を
載置し、そのベース部材１を介して、加圧ロール６で電
離放射線硬化樹脂２を均しながら、ベース部材１を電離
放射線硬化樹脂２上に積層し、電離放射線硬化樹脂２に
電離放射線を照射して硬化させた後、成形型３から離型
して所望の微細パターンを有するシートを得ることが出
来る。ここで、成形型３が加圧ロール６、ロール５間に
入ったときのみ加圧されるように加圧ロール６が昇降す
るようになっており、成形型３及びベース部材１は回転
するロールにより前進する。2. Description of the Related Art Conventionally, there is known a sheet having a base member on which fine pattern portions such as prism lenses and Fresnel lenses made of a reaction-curable resin are formed. These sheets should be molded by including the step of placing the base member on the reaction curable resin applied to the molding die and pressing it with a cylindrical pressure roll from the manufacturing process. You can 3 and 4 are diagrams schematically showing a base member laminating step in a conventional sheet manufacturing method. When a resin curable by ionizing radiation such as ultraviolet rays or electron beams is used as the reaction curable resin, the ionizing radiation curable resin 2 is placed on the molding die 3 on which a fine pattern having a shape opposite to the desired fine pattern is formed. After coating, the base member 1 is placed, and the base member 1 is laminated on the ionizing radiation curable resin 2 while leveling the ionizing radiation curable resin 2 with the pressure roll 6 through the base member 1, and the ionizing radiation curable resin 2 is ionized. After the radiation curable resin 2 is irradiated with ionizing radiation to be cured, it is released from the mold 3 to obtain a sheet having a desired fine pattern. Here, the pressure roll 6 is moved up and down so that pressure is applied only when the molding die 3 enters between the pressure roll 6 and the roll 5, and the molding die 3 and the base member 1 rotate. To move forward.
【０００３】上記の方法は、加圧ロールを用いて、反応
硬化性樹脂を均しながら成形型全面に塗布すると同時に
樹脂上にベース部材を積層することで、樹脂内および成
形型の微細パターンの谷の間に入り込む気泡や、ラミネ
ートするベース部材と成形型間に入る気泡を押し出すと
ともに、ベース部材上に形成される反応硬化性樹脂層の
厚み（以下「樹脂厚さ」という）を均一にする目的で利
用されている。In the above method, a pressure roll is used to apply the reaction-curable resin to the entire surface of the mold while leveling it, and at the same time laminating a base member on the resin to form a fine pattern in the resin and in the mold. Bubbles that enter the valleys and between the base member to be laminated and the molding die are pushed out, and the thickness of the reaction curable resin layer formed on the base member (hereinafter referred to as "resin thickness") is made uniform. It is used for the purpose.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら上記の従
来の方法においては、径が均一な円筒状の加圧ロールを
用いるため、加圧時に下記に述べるような問題が生じて
いた。図４において、加圧ロール６の両側に延長された
軸の両端部分７ａ、７ｂを保持する軸受が成形型方向に
下降することにより、ベース部材１、反応硬化性樹脂
２、成形型３が、加圧ロール６、ロール５により挟持さ
れ、さらに加圧ロール６の軸の両端部分７ａ、７ｂに荷
重を加えるように軸受が下降して成形型全幅に加圧を行
っている。この時、荷重の加えられる箇所は、加圧ロー
ル６より外側に延長された軸両端部７ａ、７ｂの２点で
あるため、図５に示すように成形型の両端部分８ａ、８
ｂが支点となり、加圧ロール６の中央部が浮き上がるよ
うにたわみを生じてしまう。そのため、成形型の両端部
で圧力が高く、中央部で圧力が低くなり、圧力が高い部
分では樹脂厚さが薄く、低い部分では樹脂厚さが厚くな
ってしまう。その結果、成形物の樹脂厚さが一様になら
ず、特に圧力の低い部分で樹脂が多く消費され、樹脂の
使用量に無駄を生じてしまう。また、圧力が低い箇所で
は、気泡の十分な押し出しが出来ないため、泡等の不良
が発生しやすくなる等の問題があった。However, in the above-mentioned conventional method, since a cylindrical pressure roll having a uniform diameter is used, the following problems occur during pressure application. In FIG. 4, the bearings holding both end portions 7a and 7b of the shaft extended to both sides of the pressure roll 6 descend in the molding die direction, whereby the base member 1, the reaction curable resin 2, and the molding die 3 are It is sandwiched between the pressure roll 6 and the roll 5, and the bearing is lowered so as to apply a load to both end portions 7a and 7b of the shaft of the pressure roll 6, and pressure is applied to the entire width of the molding die. At this time, the load is applied at two points, that is, the shaft end portions 7a and 7b extended to the outside of the pressure roll 6, and therefore, as shown in FIG.
B is used as a fulcrum, and the center portion of the pressure roll 6 is bent so as to float. Therefore, the pressure is high at both ends of the mold and the pressure is low at the center, and the resin thickness is thin at the high pressure portion and thick at the low pressure portion. As a result, the resin thickness of the molded product is not uniform, and a large amount of the resin is consumed especially in a portion where the pressure is low, resulting in a waste of the amount of the resin used. Further, at a location where the pressure is low, bubbles cannot be sufficiently extruded, so that there is a problem that defects such as bubbles are likely to occur.
【０００５】本発明は、気泡の混入がなく、また成形物
の樹脂厚さが一様なシートの製造方法およびその製造装
置を提供することを目的とするものである。It is an object of the present invention to provide a method for producing a sheet in which air bubbles are not mixed and a molded product has a uniform resin thickness, and an apparatus for producing the sheet.
【０００６】[0006]
【課題を解決するための手段】本発明は、かかる課題を
解決するために検討の結果、完成に至ったもので、反応
硬化性樹脂２が塗布された成形型３の上から、ベース部
材１を介して、加圧ロール４で前記反応硬化性樹脂２を
均しながら押圧する工程を含むシートの製造方法におい
て、押圧前の前記成形型３と前記加圧ロール４との間隙
が、加圧ロールの中心部（Ｌｃ）より両端部（Ｌｅ）で
大きくなるように幅方向の中心部の径と両端部の径に差
を設けた前記加圧ロール４で押圧することを特徴とする
シートの製造方法である。この場合に前記成形型３は、
フレネルレンズやプリズムレンズなどのレンズ型とする
ことが出来る。また、反応硬化性樹脂２が塗布され、そ
の上にベース部材１が重ねられた成形型３を、前記ベー
ス部材１側から加圧ロール４で前記反応硬化性樹脂２を
均しながら成形型３全面に塗布し、かつ樹脂２上にベー
ス部材１を積層する手段を備えたシートの製造装置にお
いて、押圧前における前記成形型３と前記加圧ロール４
との間隙が、加圧ロールの幅方向の中心部（Ｌｃ）より
両端部（Ｌｅ）で大きくなるように、前記加圧ロール４
の中心部の径と両端部の径に差を設けたことを特徴とす
るシートの製造装置である。この場合に前記成形型３は
フレネルレンズやプリズムレンズ等のレンズ型とするこ
とが出来る。The present invention has been completed as a result of studies for solving the above problems, and the present invention has been completed. From the molding die 3 coated with the reaction curable resin 2, the base member 1 In the method for producing a sheet, which includes a step of uniformly pressing the reaction curable resin 2 with a pressure roll 4 via a press, the gap between the molding die 3 and the pressure roll 4 before pressing is The sheet is characterized by being pressed by the pressure roll 4 having a difference between the diameter of the central portion in the width direction and the diameter of both end portions so that the diameter becomes larger at both end portions (Le) than at the central portion (Lc) of the roll. It is a manufacturing method. In this case, the mold 3 is
It can be a lens type such as a Fresnel lens or a prism lens. In addition, a molding die 3 on which the reaction curable resin 2 is applied and on which the base member 1 is superposed is formed, while the reaction curable resin 2 is leveled from the side of the base member 1 with a pressure roll 4. In a sheet manufacturing apparatus having means for coating the entire surface and laminating the base member 1 on the resin 2, the molding die 3 and the pressure roll 4 before pressing.
So that the gap between the pressure roll 4 and the pressure roll 4 becomes larger at both ends (Le) than in the widthwise center (Lc) of the pressure roll 4.
The sheet manufacturing apparatus is characterized in that a difference is provided between the diameter of the central portion and the diameter of both end portions. In this case, the molding die 3 can be a lens die such as a Fresnel lens or a prism lens.
【０００７】図１は本発明のシートの製造方法を模式的
に示す図である。また、図２は、本発明のシートの製造
装置における押圧前のベース部材１、成形型３、加圧ロ
ール４の状態を概念的に示す図である。成形型は、内部
応力等によって凹型および凸型などのそりが生じること
が多く、シート形成用に成形型の選別をおこなっても、
成形型の形状が均一平面でない場合がある。図２（ａ）
において、加圧ロール４は、凹型になった成形型３の形
状に対応するような形状に形成されているばかりでな
く、押圧時にロールがたわむことを考慮して、成形型３
と加圧ロール４中心部との間隙（Ｌｃ）よりも、成形型
３と加圧ロール４両端部との間隙（Ｌｅ）の方が大きく
なるように、加圧ロール４の中心部の径を両端部の径よ
り大きくなるようにしている。図２（ｂ）は、成形型３
が図の上側に向かって凸状にそっている場合を示し、加
圧ロール４は、成形型３の形状に対応するような形状
で、かつ成形型３と加圧ロール４の中心部との間隙（Ｌ
ｃ）よりも、成形型３と加圧ロール４両端部との間隙
（Ｌｅ）の方が大きくなるように、加圧ロール４の中心
部の径を両端部の径より小さくなるようにしている。成
形型３と、加圧ロール４中心部との間隙（Ｌｃ）と両端
部との間隙（Ｌｅ）の差は、シートに用いるベース部材
の厚さや剛性等も考慮して決定する。また、加圧ロール
の表面層４ａには、例えばゴム状やスポンジ状の弾性材
料を用い、加圧ロール内部の芯材４ｂには、鉄等の金属
材料等を用いて形成するが、加圧ロール４のロール部全
体４ａ、４ｂに弾性材料を用いても構わない。FIG. 1 is a schematic view showing a method for producing a sheet of the present invention. Further, FIG. 2 is a view conceptually showing the state of the base member 1, the molding die 3, and the pressure roll 4 before pressing in the sheet manufacturing apparatus of the present invention. The molding die often has a warp such as a concave shape and a convex shape due to internal stress and the like, and even if the molding die is selected for sheet formation,
The shape of the mold may not be a uniform plane. Figure 2 (a)
In addition, the pressure roll 4 is formed not only in a shape corresponding to the shape of the concave mold 3 but also in consideration of the fact that the roll bends when pressed.
The diameter of the center of the pressure roll 4 is set so that the gap (Le) between the molding die 3 and the both ends of the pressure roll 4 is larger than the gap (Lc) between the pressure roll 4 and the center of the pressure roll 4. It is designed to be larger than the diameter of both ends. FIG. 2B shows the molding die 3.
Shows a case in which the shape is convex toward the upper side of the drawing, and the pressure roll 4 has a shape corresponding to the shape of the molding die 3 and is formed between the molding die 3 and the central portion of the pressure roll 4. Gap (L
The diameter of the central portion of the pressure roll 4 is made smaller than the diameter of both ends so that the gap (Le) between the molding die 3 and the both ends of the pressure roll 4 is larger than that in c). . The difference between the gap (Lc) between the molding die 3 and the center of the pressure roll 4 and the gap (Le) between both ends is determined in consideration of the thickness and rigidity of the base member used for the sheet. The surface layer 4a of the pressure roll is made of, for example, a rubber-like or sponge-like elastic material, and the core material 4b inside the pressure roll is made of a metal material such as iron. An elastic material may be used for the entire roll portions 4a and 4b of the roll 4.
【０００８】[0008]
【作用】本発明は、あらかじめ、押圧前の成形型３と加
圧ロール４との間隙が加圧ロール４の中心部（Ｌｃ）よ
り両端部（Ｌｅ）で大きくなるように形成された加圧ロ
ール４を用いて押圧することにより、成形型に均一な圧
力をかけることができ、樹脂を無駄にせずに泡の混入の
ないレンズシートを得ることができる。According to the present invention, the pressure is preliminarily formed such that the gap between the mold 3 and the pressure roll 4 before pressing is larger at both ends (Le) than at the center (Lc) of the pressure roll 4. By pressing with the roll 4, it is possible to apply a uniform pressure to the molding die, and it is possible to obtain a lens sheet free from bubbles without wasting the resin.
【０００９】[0009]
【実施例】以下に、実施例により本発明をさらに詳細に
説明する。 実施例１ 図６は、本発明によるシートの製造方法の実施例を示す
図である。まず、図６（ａ）に示すように、ピッチ０．
１ｍｍのフレネルレンズ形状のレンズパターンを有する
縦横１ｍサイズの成形型１３の全面に、第１のＵＶ硬化
樹脂１２ａとして、屈折率１．５３、粘度約１００セン
チポイズに調製したウレタンアクリレート系の樹脂を、
厚さ０．５ｍｍのＰＥＴ製スキージにより矢印Ｘ方向に
スキージングを行って塗布した。次に、図６（ｂ）に示
すように、コの字状に第２のＵＶ硬化樹脂１２ｂをフロ
ーコート法により、第１のＵＶ硬化樹脂１２ａ上に塗布
した。この第２のＵＶ硬化樹脂１２ｂとしては、屈折率
１．５３、粘度約１５００センチポイズに調製したウレ
タンアクリレート系の樹脂を用いた。EXAMPLES The present invention will be described in more detail below with reference to examples. Example 1 FIG. 6 is a diagram showing an example of a method for manufacturing a sheet according to the present invention. First, as shown in FIG.
A urethane acrylate-based resin prepared to have a refractive index of 1.53 and a viscosity of about 100 centipoise as the first UV curable resin 12a is provided on the entire surface of a molding die 13 having a 1 mm Fresnel lens shape and a vertical and horizontal 1 m size.
A squeegee made of PET having a thickness of 0.5 mm was applied in the direction of arrow X by squeezing. Next, as shown in FIG. 6B, the second UV curable resin 12b was applied in a U-shape on the first UV curable resin 12a by a flow coating method. As the second UV curable resin 12b, a urethane acrylate resin prepared to have a refractive index of 1.53 and a viscosity of about 1500 centipoise was used.
【００１０】このようにして、樹脂溜まりを形成した
後、ベース部材１１として、塩化ビニル／酢酸ビニル共
重合体系のプライマを塗布した厚さ３．０ｍｍの紫外線
吸収剤を添加していない透明アクリル板を積載し、加圧
ロール１４およびロール１５を速度５０ｃｍ／ｍｉｎ、
線圧力２．０ｋｇ／ｃｍ2 で矢印Ｙ方向へ転動して加圧
した。その様子を図６（ｃ）に示す。ここで、加圧ロー
ル１４の芯材１４ｂには鉄を用い、加圧ロール１４の表
面層１４ａにはゴム硬度約５０の弾性材料を用いた。ま
た、ロールの幅は１３００ｍｍ、両端部の直径は３００
ｍｍとし、中央部の直径が１０ｍｍ大きくなるように芯
材１４ｂの径を変化させた加圧ロールを用いた。また、
ロール１５にも鉄を用いた。そして、ＵＶ光源１６を用
いてベース部材１１側から１６０Ｗ／ｃｍの紫外線（Ｕ
Ｖ）を照射し、第１のＵＶ硬化樹脂１２ａと第２のＵＶ
硬化樹脂１２ｂを硬化した。After the resin pool is formed in this manner, a transparent acrylic plate having a thickness of 3.0 mm, to which a primer of vinyl chloride / vinyl acetate copolymer system is applied and which is not added with an ultraviolet absorber, is formed as the base member 11. The pressure roll 14 and the roll 15 at a speed of 50 cm / min,
Rolling was performed in the direction of arrow Y at a linear pressure of 2.0 kg / cm 2 to apply pressure. This is shown in FIG. 6 (c). Here, iron was used for the core material 14b of the pressure roll 14, and an elastic material having a rubber hardness of about 50 was used for the surface layer 14a of the pressure roll 14. The width of the roll is 1300 mm and the diameter of both ends is 300.
mm, and a pressure roll in which the diameter of the core material 14b was changed so that the diameter of the central portion was increased by 10 mm was used. Also,
Iron was also used for the roll 15. Then, using the UV light source 16, ultraviolet rays (U
V) to irradiate the first UV curable resin 12a and the second UV
The cured resin 12b was cured.
【００１１】最後に、図６（ｄ）に示すように、成形型
１３を解圧離型して、フレネルレンズシートを得た。そ
の結果、硬化後の成形物のベース部材上に形成された樹
脂厚さのばらつきは、従来の径の均一な円筒状の加圧ロ
ールを用いて製造した場合は約５０μｍ程度であったも
のが、約２０μｍ以下に低減し、全面ほぼ均一な樹脂厚
が得られた。なお、フレネルレンズでは、同心円状に配
置されたレンズの高さは中心からの位置によって変化す
るので、ここではレンズ最低部（溝の一番深い部所）か
らベース部材までの厚みを樹脂厚さとして測定した。ま
た、泡等の不良の発生はほとんどみられなかった。Finally, as shown in FIG. 6 (d), the mold 13 was depressurized and released to obtain a Fresnel lens sheet. As a result, the variation in the thickness of the resin formed on the base member of the molded product after curing was about 50 μm when manufactured using a conventional cylindrical pressure roll having a uniform diameter. The thickness was reduced to about 20 μm or less, and the resin thickness was almost uniform over the entire surface. In a Fresnel lens, the height of the concentric lenses varies depending on the position from the center, so here the thickness from the lens's lowest part (the deepest part of the groove) to the base member is the resin thickness. Was measured as. In addition, the occurrence of defects such as bubbles was hardly seen.
【００１２】実施例２ 図７は本発明によるシートの製造装置の実施例を示す図
であって、反応硬化性樹脂にＵＶ硬化樹脂を用いた場合
の実施例であり、塗布ノズル２２および２５、スキージ
２３、熱風乾燥機２４、ベース部材積載機２６、加圧ロ
ール２７、ロール２８、光源２９、昇降装置２１ａ、２
１ｂから構成されている。まず、成形型をコンベアーに
より前進させながら固定式の塗布ノズル２２より第１の
ＵＶ硬化樹脂が滴下され、成形型の一端に第１のＵＶ硬
化樹脂の樹脂溜まりが形成される。次に、成形型を所定
位置に停止して、成形型の一端に形成された前記樹脂溜
まりをスキージ２３で成形型の進行方向に対して垂直方
向にスキージングを行うことにより成形型全面に第１の
ＵＶ硬化樹脂が塗布される。第１のＵＶ硬化樹脂が塗布
された成形型は、次に熱風乾燥機２４に送られ、第１の
ＵＶ硬化樹脂に含まれる余分な溶剤が揮散させられる。
次に成形型はＸＹ軸可動式塗布ノズル２５の下に搬送さ
れ、前記塗布ノズル２５より第２のＵＶ硬化樹脂が、成
形型の進行方向に対して左右両端と進行方向側の一端に
滴下され、成形型上に塗布された第１のＵＶ硬化樹脂上
に、さらに、コの字状の第２のＵＶ硬化樹脂溜まりが形
成される。Embodiment 2 FIG. 7 is a view showing an embodiment of a sheet manufacturing apparatus according to the present invention, which is an embodiment in which a UV curable resin is used as a reaction curable resin. The coating nozzles 22 and 25, Squeegee 23, hot air dryer 24, base member stacker 26, pressure roll 27, roll 28, light source 29, lifting device 21a, 2
It is composed of 1b. First, the first UV curable resin is dropped from the fixed type coating nozzle 22 while the molding die is moved forward by the conveyor, and a resin pool of the first UV curable resin is formed at one end of the molding die. Next, the molding die is stopped at a predetermined position, and the resin pool formed at one end of the molding die is squeegeeed by a squeegee 23 in a direction perpendicular to the traveling direction of the molding die to form a first surface over the molding die. 1 UV curable resin is applied. The mold to which the first UV curable resin has been applied is then sent to the hot air dryer 24, and the excess solvent contained in the first UV curable resin is volatilized.
Next, the molding die is conveyed under the XY-axis movable coating nozzle 25, and the second UV curable resin is dropped from the coating nozzle 25 onto both left and right ends and one end on the traveling direction side with respect to the traveling direction of the molding die. Further, a U-shaped second UV curable resin reservoir is further formed on the first UV curable resin applied on the molding die.
【００１３】このようにして樹脂溜まりが形成された成
形型の上に、ベース部材積載機２６によってベース部材
が載置され、その後、加圧ロール２７、ロール２８との
間を通過させて、加圧ロール２７によって、ＵＶ硬化樹
脂が均一化されながら樹脂上にベース部材が積層され
る。この加圧ロール２７の中央部の径と両端部の径の差
を調整することによりレンズ最低部からベース部材まで
の樹脂厚の均一な成形物を得ることができる。成形型全
面に加圧した後、光源２９より紫外線が照射されてＵＶ
硬化樹脂が硬化される。最後に成形型を解圧離型して、
シートを得る。シートが離型された成形型は、昇降装置
２１ｂが下降することによりコンベアー２１ｃに運ば
れ、コンベアー２１ｃにより搬送された成形型は、昇降
装置２１ａにより再び製造ラインへ戻され、シートの製
造が繰り返される。The base member is placed by the base member loading machine 26 on the molding die in which the resin pool is formed in this manner, and then the base member is passed between the pressure roll 27 and the roll 28 to apply the pressure. The base material is laminated on the resin while the UV curable resin is made uniform by the pressure roll 27. By adjusting the difference between the diameter of the central portion of the pressure roll 27 and the diameter of both end portions, a molded product having a uniform resin thickness from the lens lowest portion to the base member can be obtained. After pressure is applied to the entire surface of the molding die, ultraviolet rays are emitted from the light source 29 to UV.
The cured resin is cured. Finally, depressurize and release the mold,
Get the sheet. The mold from which the sheet has been released is conveyed to the conveyor 21c by the elevating device 21b descending, and the mold conveyed by the conveyor 21c is returned to the manufacturing line again by the elevating device 21a to repeat the sheet manufacturing. Be done.
【００１４】[0014]
【発明の効果】本発明は、押圧前の成形型と加圧ロール
との間隙が、加圧ロールの中心部より両端部で大きくな
るようにロール中心部の径と両端部の径に差を設けた加
圧ロールを用いてシートを成形したので、樹脂使用量に
無駄を生じず、樹脂厚の均一な成形物を得ることができ
る。また、不良発生頻度が高く、成形品の幅方向中心部
で残留しやすい泡を、この加圧ロールを用いることで低
減できるため、品質の向上にも貢献する。According to the present invention, there is a difference between the diameter of the center of the roll and the diameter of both ends so that the gap between the mold before pressing and the pressure roll is larger at both ends than at the center of the pressure roll. Since the sheet is molded using the provided pressure roll, the amount of resin used is not wasted, and a molded product having a uniform resin thickness can be obtained. In addition, bubbles that frequently occur in defects and tend to remain in the center portion of the molded product in the width direction can be reduced by using this pressure roll, which also contributes to the improvement of quality.
【図１】本発明によるシートの製造方法を示す図であ
る。FIG. 1 is a diagram showing a method for manufacturing a sheet according to the present invention.
【図２】本発明のシートの製造装置における加圧ロール
と成形型の関係を示す図である。FIG. 2 is a diagram showing a relationship between a pressure roll and a molding die in the sheet manufacturing apparatus of the present invention.
【図３】従来のシートの製造方法のベース部材積層工程
を示す図である。FIG. 3 is a diagram showing a base member laminating step of a conventional sheet manufacturing method.
【図４】従来のシートの製造方法のベース部材積層工程
を示す図である。FIG. 4 is a diagram showing a base member laminating step of a conventional sheet manufacturing method.
【図５】従来のシートの製造方法の加圧工程を示す図で
ある。FIG. 5 is a diagram showing a pressing step of a conventional sheet manufacturing method.
【図６】本発明によるシートの製造方法の実施例を示す
図である。FIG. 6 is a diagram showing an example of a method for manufacturing a sheet according to the present invention.
【図７】本発明によるシートの製造装置の実施例を示す
図である。FIG. 7 is a diagram showing an embodiment of a sheet manufacturing apparatus according to the present invention.
１、１１・・・ベース部材 ２、・・・反応硬化性樹脂 ３、１３・・・成形型 ４、２７・・・加圧ロール ４ａ、１４（ａ）・・・加圧ロール表層部 ４ｂ、１４（ｂ）・・・加圧ロール芯材部 ５、２８・・・ロール ６・・・円筒状加圧ロール ７・・・軸受 ８・・・成形型端部 １２（ａ）・・・第１のＵＶ硬化樹脂 １２（ｂ）・・・第２のＵＶ硬化樹脂 １６、２９・・・光源 ２１ａ、２１ｂ・・・昇降装置 ２１ｃ・・・コンベアー ２２、２５・・・塗布ノズル ２３・・・スキージ ２４・・・熱風乾燥機 ２６・・・ベース部材積載機 1, 11 ... Base member 2, ... Reaction curable resin 3, 13 ... Mold 4, 27 ... Pressure roll 4a, 14 (a) ... Pressure roll surface layer part 4b, 14 (b) ... Pressure roll core member 5, 28 ... Roll 6 ... Cylindrical pressure roll 7 ... Bearing 8 ... Mold end 12 (a) ... 1 UV curable resin 12 (b) ... Second UV curable resin 16,29 ... Light source 21a, 21b ... Elevating device 21c ... Conveyor 22,25 ... Coating nozzle 23 ... Squeegee 24 ... Hot air dryer 26 ... Base member loading machine
フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 // Ｂ２９Ｌ 9:00 11:00 Continuation of front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location // B29L 9:00 11:00
Claims (4)
から、ベース部材を介して、加圧ロールで前記反応硬化
性樹脂を均しながら押圧する工程を含むシートの製造方
法において、押圧前の前記成形型と前記加圧ロールとの
間隙が、加圧ロールの中心部より両端部で大きくなるよ
うに、幅方向の中心部の径と両端部の径に差を設けた前
記加圧ロールで押圧することを特徴とするシートの製造
方法。1. A method for producing a sheet, which comprises a step of pressing the reaction curable resin while uniformly pressing the reaction curable resin with a pressure roll through a base member from above a mold to which the reaction curable resin has been applied. The pressure applied with a difference between the diameter of the center and the diameter of both ends in the width direction so that the gap between the former molding die and the pressure roll is larger at both ends than the center of the pressure roll. A method for producing a sheet, comprising pressing with a roll.
記載のシートの製造方法。2. The molding die is a lens die.
A method for producing the described sheet.
ース部材が重ねられた成形型を、前記ベース部材側から
加圧ロールで前記反応硬化性樹脂を均しながら押圧する
手段を備えたシートの製造装置において、押圧前におけ
る前記成形型と前記加圧ロールとの間隙が、加圧ロール
の幅方向の中心部より両端部で大きくなるように、前記
加圧ロールの中心部の径と両端部の径に差を設けたこと
を特徴とするシートの製造装置。3. A means for pressing a molding die, on which a reaction curable resin is applied and on which a base member is overlaid, from the side of the base member while evenly pressing the reaction curable resin with a pressure roll. In the sheet manufacturing apparatus, the gap between the molding die and the pressure roll before pressing is such that the diameter of the center portion of the pressure roll is larger than the widthwise center portion of the pressure roll at both ends. A sheet manufacturing apparatus, characterized in that a difference is provided in the diameters of both ends.
記載のシートの製造装置。4. The molding die is a lens die.
An apparatus for manufacturing the described sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5321078A JPH07148751A (en) | 1993-11-26 | 1993-11-26 | Sheet manufacturing method and manufacturing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5321078A JPH07148751A (en) | 1993-11-26 | 1993-11-26 | Sheet manufacturing method and manufacturing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07148751A true JPH07148751A (en) | 1995-06-13 |
Family
ID=18128568
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5321078A Pending JPH07148751A (en) | 1993-11-26 | 1993-11-26 | Sheet manufacturing method and manufacturing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07148751A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6740265B2 (en) | 2000-12-08 | 2004-05-25 | Dai Nippon Printing Co., Ltd. | Method and apparatus for peeling a lens sheet from a forming mold therefor |
| US6752615B2 (en) | 2000-11-22 | 2004-06-22 | Dai Nippon Printing Co., Ltd. | Forming mold for a lens sheet |
| US6869548B2 (en) | 2000-11-29 | 2005-03-22 | Dai Nippon Printing Co., Ltd. | Method and apparatus for manufacturing a plurality of kinds of sheets having ionizing radiation curing type resin layer |
| US6877973B2 (en) | 2000-11-10 | 2005-04-12 | Dai Nippon Printing Co., Ltd. | Method and apparatus for manufacturing a lens sheet |
| JP2022024960A (en) * | 2019-11-08 | 2022-02-09 | イフォクレール ヴィヴァデント アクチェンゲゼルシャフト | Method for constructing creation mold of molded body by stereolithography |
-
1993
- 1993-11-26 JP JP5321078A patent/JPH07148751A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6877973B2 (en) | 2000-11-10 | 2005-04-12 | Dai Nippon Printing Co., Ltd. | Method and apparatus for manufacturing a lens sheet |
| US6752615B2 (en) | 2000-11-22 | 2004-06-22 | Dai Nippon Printing Co., Ltd. | Forming mold for a lens sheet |
| US6869548B2 (en) | 2000-11-29 | 2005-03-22 | Dai Nippon Printing Co., Ltd. | Method and apparatus for manufacturing a plurality of kinds of sheets having ionizing radiation curing type resin layer |
| US6740265B2 (en) | 2000-12-08 | 2004-05-25 | Dai Nippon Printing Co., Ltd. | Method and apparatus for peeling a lens sheet from a forming mold therefor |
| JP2022024960A (en) * | 2019-11-08 | 2022-02-09 | イフォクレール ヴィヴァデント アクチェンゲゼルシャフト | Method for constructing creation mold of molded body by stereolithography |
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