JPH01316702A - Production of lens sheet - Google Patents

Production of lens sheet

Info

Publication number
JPH01316702A
JPH01316702A JP63149002A JP14900288A JPH01316702A JP H01316702 A JPH01316702 A JP H01316702A JP 63149002 A JP63149002 A JP 63149002A JP 14900288 A JP14900288 A JP 14900288A JP H01316702 A JPH01316702 A JP H01316702A
Authority
JP
Japan
Prior art keywords
lens
lens sheet
base material
press
mold
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
JP63149002A
Other languages
Japanese (ja)
Inventor
Mizuo Okada
岡田　瑞夫
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.)
Mitsubishi Rayon Co Ltd
Original Assignee
Mitsubishi Rayon 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 Mitsubishi Rayon Co Ltd filed Critical Mitsubishi Rayon Co Ltd
Priority to JP63149002A priority Critical patent/JPH01316702A/en
Publication of JPH01316702A publication Critical patent/JPH01316702A/en
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • B29C33/048—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam using steam
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B29C33/04—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means using liquids, gas or steam
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/021—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • 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
    • B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/32—Component parts, details or accessories; Auxiliary operations
    • B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/16—Cooling
    • B29C2035/1616—Cooling using liquids
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/02—Moulds or cores; Details thereof or accessories therefor with incorporated heating or cooling means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2709/00—Use of inorganic materials not provided for in groups B29K2703/00 - B29K2707/00, for preformed parts, e.g. for inserts
    • B29K2709/08—Glass
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2011/00—Optical elements, e.g. lenses, prisms
    • B29L2011/0016—Lenses
    • B29L2011/005—Fresnel lenses

Abstract

PURPOSE:To produce the lens sheet with high efficiency by utilizing a meltable thermoplastic material by previously heating and melting the thermoplastic material, spreading the same on a lens mold surface, press-welding a light transparent base material to this surfaced, and parting the lens sheet from the mold after cooling, thereby integrating both the materials. CONSTITUTION:The lens mold 1 is previously heated up by passing steam in a cartridge heater 11 and a heat medium flow passage 12 to heat up the lens surface 10. The thermoplastic material A is preheated in a hot wind stove and is placed on the lens surface 20. The similarly preheated light transparent base material B is placed thereon and is press-welded to the above-mentioned material by lowering a press plate 2. The power source of the cartridge heater 11 is turned off simultaneously with the press welding and a large volume of cold water is passed in the heat medium flow passages 12, 21 to rapidly cool the lens sheet; thereafter, the lens sheet is taken out. Such a restriction as in case of using UV irradiation is eliminated in this way and the lens sheet which has a prescribed shape and is securely laminated and integrated to the base material B is efficiently produced.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明は、プ四ジエクシ璽ンテレビのスクリーン用、太
陽光集光用あるいはオーバーへ□ツドプ四ジエクター用
郷に用いられる各種フレネルレンズやレンチキユラーレ
ンズ、フライアイを１１、ｔたレンズシート、プリズム
状突起群を有するシート等、比較的広い面積にわたり【
レンズ群が形成されたレンズシートを製造する方法に関
するものである。Detailed Description of the Invention (Field of Industrial Application) The present invention is applied to various Fresnel lenses and lenticules used for TV screens, sunlight condensing, and It covers a relatively wide area, such as a large lens, a lens sheet with a fly's eye of 11 mm, a sheet with a group of prismatic protrusions, etc.
The present invention relates to a method of manufacturing a lens sheet on which lens groups are formed.

（従来の技術）　　　′ 上記の如きレンズシートを製造する方法として最も一般
的なものは、熱可暖性樹脂を使用し、鋳込み成形、熱プ
レス成形あるいは押出し成形によりて得る方法でありた
。これらの方法では一定の成形圧力に耐えるためのレン
ズ戴や大規模な製造設備を要するため、製造コストが嵩
む憾みがあった。(Prior Art) The most common method for manufacturing the above-mentioned lens sheet is to use a thermoplastic resin and obtain it by casting, hot press molding, or extrusion molding. These methods require a lens holder and large-scale manufacturing equipment to withstand a certain molding pressure, and therefore have the disadvantage of increasing manufacturing costs.

この点を改善するため、紫外線硬化樹脂を応用し、既存
ガ”透明基材に対してレンズのみを成形する所謂ツー・
ピース法が、例えば％開昭６１−１７７２１５号公報等
によりて提案されている。　　□ （発明が解決しようとする課題） ところが上記ツー・ピース法によりてレンズシートを製
造する場合、■紫外線硬化樹脂が総じてコスト高で゛あ
るため、コストの低廉化に制約があること、■透明基材
を通して紫外線を照射して硬化させるため、該透明基材
に耐候性を上げるための紫外線吸収剤が入れられないこ
と、■同様に透明基材に拡散性を付与するための拡散剤
の使用に制限があること郷の問題点が残されている。In order to improve this point, we applied ultraviolet curable resin to create a so-called two-piece molding method in which only lenses are molded onto a transparent base material.
The piece method has been proposed, for example, in Japanese Patent Publication No. 177215/1983. □ (Problem to be solved by the invention) However, when manufacturing a lens sheet using the above-mentioned two-piece method, there are two problems: - Ultraviolet curing resins are generally expensive, so there are restrictions on reducing costs; Since the process is cured by irradiating ultraviolet rays through the base material, no UV absorber can be added to the transparent base material to increase its weather resistance. Similarly, a diffusing agent is used to impart diffusibility to the transparent base material. The problem with townships remains that there are restrictions on

本発明はこのような状況に鑑み、紫外線硬化方式を採用
することなく、溶融性の熱可塑性材料を巧みに利用して
、上述の問題点を解消した効率の良いレンズシートの製
造方法を提供しようとするものである。In view of this situation, the present invention aims to provide an efficient method for manufacturing a lens sheet that eliminates the above-mentioned problems by skillfully utilizing a meltable thermoplastic material without employing an ultraviolet curing method. That is.

（課題を解決するための手段） すなわち本発明は上記課題を達成するためになされたも
ので、その要旨とするところは、透光性基材の少なくと
も一面に、薄層レンズシート部を積層一体化してレンズ
シートを製造する方法において、薄層レンズシート部を
構成する熱可塑性材料を予め加熱溶融してレンズ型面に
展延せしめ、次いでこの展延した面に接するように透光
性基材を圧着させ、冷却後に脱型して両者を一体化する
ことを特徴とするレンズシートの製造方法にある。(Means for Solving the Problems) That is, the present invention has been made to achieve the above-mentioned problems, and its gist is that a thin lens sheet portion is laminated and integrated on at least one surface of a translucent base material. In this method, a thermoplastic material constituting the thin lens sheet portion is heated and melted in advance and spread on a lens mold surface, and then a translucent base material is placed in contact with the spread surface. The method of manufacturing a lens sheet is characterized in that the two are crimped and cooled and then demolded to integrate the two.

（実施例） 以下、本発明の製造方法の実施例を図面に従って説明す
る。(Example) Hereinafter, an example of the manufacturing method of the present invention will be described with reference to the drawings.

第１図は本発明の製造方法の一例を実施する装置を示し
ており、図中（１）がレンズ型で、このレンズ型（１）
にはレンズ型面（ｌＯ）が形成されている。このレンズ
型面（１０）は、図示の場合サーキュラ−フレネルレン
ズを形成する型面が形成されているが、この面は目的と
するレンズを形成するための、例えばレンチキュラーレ
ンズやフライアイ等のレンズ型面が形成される。この例
においては、例えば大きさが縦、横それぞれ１ｍ、焦点
距離が２ｍ、ピッチが０．１６ｍの凸のサーキュラ−フ
レネルを形成するためのレンズ型面（１０）が形成され
ている。また図中（１１）は、レンズ！　（１）に埋入
されたカートリッジヒーターで、レンズ型（１）を加熱
するために用いられ、ａ２）は同じくレンズ型（１）Ｋ
埋設された熱媒流路であり、蒸気や水を通し【レンズ型
（１）を加熱したり冷却するために用いられる。これら
の麗とし【アルミニウム材を用い、カートリッジヒータ
ー（１１）としてはＩＫＷのものをｌＯ本埋大している
。FIG. 1 shows an apparatus for carrying out an example of the manufacturing method of the present invention, in which (1) is a lens type;
A lens-shaped surface (lO) is formed on the surface. This lens mold surface (10) is formed with a mold surface for forming a circular Fresnel lens in the case shown in the figure, but this surface is used for forming a lens such as a lenticular lens or a fly's eye lens. A mold surface is formed. In this example, a lens-shaped surface (10) is formed for forming a convex circular Fresnel with a size of, for example, 1 m in length and width, 2 m in focal length, and 0.16 m in pitch. Also, (11) in the figure is a lens! A cartridge heater embedded in (1) is used to heat the lens mold (1), and a2) is also a cartridge heater embedded in the lens mold (1) K.
This is a buried heat medium flow path that is used to heat and cool the lens mold (1) by passing steam or water through it. These beautiful aluminum materials are used, and the cartridge heater (11) is filled with 10 IKW cartridge heaters.

また（２）は、上記レンズ型（１）を支持している定盤
（３）Ｋ対応して用いられるプレス盤で、油圧等で昇降
し５るよ５になっている。なおこのプレス盤（２）のプ
レス面（２０）は中央がごく僅かに凹んでいると良い。Further, (2) is a press plate used in correspondence with the surface plate (3) K that supports the lens mold (1), and is raised and lowered by hydraulic pressure or the like to form a 5-5 structure. Note that the press surface (20) of this press plate (2) is preferably slightly concave in the center.

そしてこのプレス盤（２）　Ｋも、熱媒流路（２１）が
埋設されている。This press plate (2) K also has a heat medium flow path (21) buried therein.

上記の如き装置によりて製造するものであるが、本発明
に用いる熱可塑性材料（Ａ）としては、ホットメルト系
接着剤等として市販されているものが使用可能であり、
具体的には飽和ポリエステル系、ポリアミド系、エチレ
ン−酢醗ビニル共重合体、ポリエチレン、ポリプロピレ
ン、ブチルゴムやインプレンゴム等の合成ゴム系のもの
が挙げられる。The thermoplastic material (A) used in the present invention is manufactured using the above-mentioned apparatus, and as the thermoplastic material (A), commercially available hot melt adhesives etc. can be used.
Specific examples include saturated polyester, polyamide, ethylene-acetate vinyl copolymer, polyethylene, polypropylene, and synthetic rubber such as butyl rubber and imprene rubber.

また本発明に用いる透光性基材（Ｂ）としては、アクリ
ル樹脂やポリカーボネート樹脂をはじめとする各種合成
樹脂シートやフィルム類、ガラス板等が使用しうる。Further, as the light-transmitting substrate (B) used in the present invention, various synthetic resin sheets and films including acrylic resin and polycarbonate resin, glass plates, etc. can be used.

具体的には、上記熱可塑性材料体）の中から東し社製ホ
ットメルトフィルム「ケミット」の厚さ２００μ、大き
さ縦、横１ｍのものを選び、透光性基材（Ｂ）とし工は
三菱レイヨン社製アクリル樹脂シート［アクリライト＋
００１Ｊの厚さ３ｆｉ、大きさ縦、横１ｍのものを選ん
だ。Specifically, from among the thermoplastic materials mentioned above, a hot melt film "Kemit" manufactured by Toshi Co., Ltd. with a thickness of 200 μm and a size of 1 m in length and width was selected and used as the translucent base material (B). is an acrylic resin sheet manufactured by Mitsubishi Rayon [Acrylite+
I chose 001J with a thickness of 3fi and a size of 1m in length and width.

予めレンズ型（１）を、カートリッジヒーター（１１）
と熱媒流路（１２）中に蒸気を通して昇温させ、レンズ
面（１０）が２００℃になるように準備し、上記「ケミ
ット」フィルムを熱風炉中で１５０℃に予熱してレンズ
’［（１０）上に載せると共に、この上に同様に１００
℃に予熱した「アクリライ）＃００１Ｊを載せ、プレス
盤（２）を下降させて圧着した。Place the lens mold (1) in advance and the cartridge heater (11).
Steam is passed through the heat medium flow path (12) to raise the temperature, and the lens surface (10) is prepared to reach 200°C.The above ``Chemit'' film is preheated to 150°C in a hot air oven to form the lens'[ (10) At the same time as putting it on top, 100
Acrylai #001J preheated to 0.degree.

圧着と同時にカートリッジヒーター（１１）の電源をき
り、熱媒流路（１２）、　（２１）中に１５℃の冷水を
多量に流して、約２分間急冷したのち、プレス盤（２）
を上昇させ、レンズシートを取り出した。At the same time as the crimping, turn off the power to the cartridge heater (11), pour a large amount of cold water at 15°C into the heat medium channels (12) and (21), and after rapidly cooling for about 2 minutes, press the press plate (2).
was raised and the lens sheet was taken out.

圧着してからこの製品取り出しまでの所要時間は約３分
間でありた。The time required from crimping to taking out the product was approximately 3 minutes.

このようにして得られたレンズシートを示すのが第２図
で、透光性基材（Ｂ）の−面に、熱可屋性材料（４）に
よるフレネルレンズシート部が所定形状通りに、しかも
強固に一体化された優れたものでありた。FIG. 2 shows the lens sheet obtained in this way, in which a Fresnel lens sheet portion made of a thermoplastic material (4) is formed in a predetermined shape on the − side of the transparent substrate (B). Moreover, it was an excellent product that was strongly integrated.

以上本発明の実施例を中心に説明したが、本発明は上記
の説明に限られるものではなく、例えば透光性基材（Ｂ
）の両面に薄層レンズシート部を一体的に形成すること
もできるし、拡散剤や着色剤を含む透光性基材（Ｂ）を
使用することもでき、また製造に使用する装置も図示の
例に限定されｆ、例えばプレス盤（２）の代わりにプレ
スローラーを用いることも可能である。Although the embodiments of the present invention have been mainly explained above, the present invention is not limited to the above explanations, and for example, the transparent base material (B
) It is also possible to integrally form a thin layer lens sheet portion on both sides of the lens sheet, or a translucent base material (B) containing a diffusing agent and a coloring agent can be used. The equipment used for manufacturing is also shown in the figure. For example, it is also possible to use a press roller instead of the press plate (2).

（発明の効果） 本発明は以上詳述した如き構成からなるものであるから
、特別高価な製造設備や材料を用いることなく、しかも
紫外線照射による場合のような制約がなく、所定の形状
を備え、かつ透光性基材に対して強固に積層一体化され
た優れたレンズシートを効率良く製造し５る利点がある
。(Effects of the Invention) Since the present invention has the configuration as described in detail above, it does not require the use of particularly expensive manufacturing equipment or materials, and there is no restriction as in the case of ultraviolet irradiation. This method has the advantage of efficiently producing an excellent lens sheet that is firmly laminated and integrated with a light-transmitting substrate.

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

第１図は本発明の方法を実施するために使用する装置の
断面図、第２図はこの方法によりて得られたレンズシー
トの断面図である。 （１）・・・・・レンズ型 （２）・・・・・プレス盤 （４）・・・・・熱可胆性材料 俤）・・・・・透光性基材FIG. 1 is a sectional view of an apparatus used to carry out the method of the present invention, and FIG. 2 is a sectional view of a lens sheet obtained by this method. (1)...Lens type (2)...Press plate (4)...Thermoplastic material)...Translucent base material

Claims (1)

【特許請求の範囲】[Claims] 透光性基材の少なくとも一面に、薄層レンズシート部を
積層一体化してレンズシートを製造する方法において、
薄層レンズシート部を構成する熱可塑性材料を予め加熱
溶融してレンズ型面に展延せしめ、次いでこの展延した
面に接するように透光性基材を圧着させ、冷却後に脱型
して両者を一体化することを特徴とするレンズシートの
製造方法。In a method for manufacturing a lens sheet by laminating and integrating a thin layer lens sheet portion on at least one surface of a translucent base material,
The thermoplastic material constituting the thin lens sheet portion is heated and melted in advance and spread on the surface of the lens mold, then a translucent base material is crimped so as to be in contact with this spread surface, and after cooling, the mold is removed. A method for manufacturing a lens sheet characterized by integrating both.
JP63149002A 1988-06-16 1988-06-16 Production of lens sheet Pending JPH01316702A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63149002A JPH01316702A (en) 1988-06-16 1988-06-16 Production of lens sheet

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63149002A JPH01316702A (en) 1988-06-16 1988-06-16 Production of lens sheet

Publications (1)

Publication Number Publication Date
JPH01316702A true JPH01316702A (en) 1989-12-21

Family

ID=15465514

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63149002A Pending JPH01316702A (en) 1988-06-16 1988-06-16 Production of lens sheet

Country Status (1)

Country Link
JP (1) JPH01316702A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0686490A2 (en) * 1994-06-10 1995-12-13 JOHNSON & JOHNSON VISION PRODUCTS, INC. Mold separation method and apparatus
EP0775571A2 (en) * 1995-11-21 1997-05-28 JOHNSON & JOHNSON VISION PRODUCTS, INC. Infra-red heat source for demolding contact lenses
KR100425511B1 (en) * 2000-08-23 2004-03-30 양근창 Apparatus and Method for Manufacturing light guide plate for plane light source unit
US7204949B2 (en) 2003-03-20 2007-04-17 Ricoh Company, Ltd. Method of manufacturing a plastic laminate body
JP2008199060A (en) * 2008-05-02 2008-08-28 Matsushita Electric Ind Co Ltd Pressure bonding unit structure and pressure bonding method using the same
JP2010066518A (en) * 2008-09-11 2010-03-25 Glory Science Co Ltd Fresnel lens, device for manufacturing fresnel lens and method thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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