JPH0682537B2 - Method for manufacturing cathode ray tube with front glass - Google Patents
Method for manufacturing cathode ray tube with front glassInfo
- Publication number
- JPH0682537B2 JPH0682537B2 JP19200886A JP19200886A JPH0682537B2 JP H0682537 B2 JPH0682537 B2 JP H0682537B2 JP 19200886 A JP19200886 A JP 19200886A JP 19200886 A JP19200886 A JP 19200886A JP H0682537 B2 JPH0682537 B2 JP H0682537B2
- Authority
- JP
- Japan
- Prior art keywords
- front glass
- ray tube
- cathode ray
- convex surface
- tube bulb
- 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 - Lifetime
Links
Landscapes
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Vessels, Lead-In Wires, Accessory Apparatuses For Cathode-Ray Tubes (AREA)
Description
【発明の詳細な説明】 ［発明の目的］ （産業上の利用分野） 本発明は陰極線管の前面にフィルター等の前面ガラスの
付いた陰極線管の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application] The present invention relates to a method for manufacturing a cathode ray tube having a front glass such as a filter on the front surface of the cathode ray tube.
（従来の技術） ディスプレー用陰極線管の前面にはコントラスト特性を
向上させるため、一部の波長を選択吸収する前面ガラス
が配設される。前面ガラスは陰極線管バルブのフェース
プレート形状とほぼ同じ形状をなしており、厚さ約2.5
〜5mmの板ガラスで、接着力の強い熱硬化性樹脂を介し
て陰極線管バルブのフェースプレートに接着される。(Prior Art) A front glass that selectively absorbs a part of wavelengths is provided on the front surface of a cathode ray tube for display in order to improve contrast characteristics. The front glass has almost the same shape as the face plate shape of the cathode ray tube bulb, and the thickness is about 2.5.
A plate glass of ~ 5 mm, which is bonded to the face plate of a cathode ray tube bulb through a thermosetting resin having a strong adhesive force.
（発明が解決しようとする問題点） この様な構造の陰極線管は振動の激しい環境で使用した
り、取り扱い中に前面ガラスが割れるという現象が僅か
にみられる。この原因は前面ガラスとフェースプレート
間の間隔が一様でないので、樹脂が加熱されて硬化した
後、室温に戻ったとき、樹脂の収縮量に差が生じて、つ
まりフェースプレート周辺の収縮量が中央より大きくな
って前面ガラスの表面に引っ張り応力が残ってしまうこ
とが考えられる。この対策として、特開昭57−105949号
公報第２図のように前面ガラスの内面をフェースプレー
ト形状に合うように加工する方法が考えられる。しかし
ながらこの様な形状にガラスを加工すると残留応力の問
題はある程度解消されるが前面ガラスのコスト高につな
がり、充分な方法ではない。(Problems to be Solved by the Invention) The cathode ray tube having such a structure has a slight phenomenon that it is used in an environment with severe vibration or the front glass is broken during handling. The cause of this is that the distance between the front glass and the face plate is not uniform, so when the resin is heated and hardened and then returns to room temperature, there is a difference in the amount of shrinkage of the resin, that is, the amount of shrinkage around the face plate. It is conceivable that the stress becomes larger than the center and tensile stress remains on the surface of the windshield. As a countermeasure against this, a method of processing the inner surface of the front glass so as to match the shape of the face plate as shown in FIG. 2 of JP-A-57-105949 can be considered. However, when the glass is processed into such a shape, the problem of residual stress is solved to some extent, but this leads to an increase in the cost of the windshield and is not a sufficient method.
（問題点を解決するための手段） 本発明は凸面を有する陰極線管バルブの前面に配設する
板状の前面ガラスを、陰極線管バルブの凸面と対向する
ように凸状に反らした状態で保持する工程と、 この前面ガラスから所定間隔離れた位置に陰極線管バル
ブを、その凸面が前面ガラスと対向するように配設する
工程と、 陰極線管バルブの凸面と前面ガラスとの間に硬化性樹脂
を注入する工程と、 硬化性樹脂がほぼ硬化した後、前面ガラスを凸状に反ら
した保持状態を解除する工程とを有することを特徴とす
る前面ガラス付き陰極線管の製造方法である。(Means for Solving Problems) According to the present invention, a plate-shaped front glass disposed on the front surface of a cathode ray tube bulb having a convex surface is held in a convex warped shape so as to face the convex surface of the cathode ray tube bulb. And a step of disposing the cathode ray tube bulb at a position apart from the front glass by a predetermined distance so that its convex surface faces the front glass, and a curable resin between the convex surface of the cathode ray tube valve and the front glass. And a step of releasing the holding state in which the front glass is warped in a convex shape after the curable resin is substantially cured, the method of manufacturing a cathode ray tube with a front glass.
（作用） 本発明によれば前面ガラスを凸状に反らした状態で保持
し、硬化性樹脂がほぼ硬化した後、前記保持状態を解除
するので製品となった状態では前面ガラスの表面の残留
引っ張り応力が小さくなる。その結果前面ガラスが割れ
る事故が少なくなる。(Function) According to the present invention, the front glass is held in a state of being warped in a convex shape, and after the curable resin is almost cured, the holding state is released, so that the product is in a state of being pulled by residual pulling on the surface of the front glass. The stress becomes small. As a result, the number of accidents in which the front glass breaks is reduced.
（発明の実施例） 第１図〜第３図により本発明の実施例を説明する。(Embodiment of the Invention) An embodiment of the present invention will be described with reference to FIGS.
第１図は前面ガラスを治具（１）に接着した状態を示す
もので、前面ガラス（２）はその周辺部４ヶ所がストッ
パー（３）により保持され、中央部は押圧用ネジ（４）
により突き上げられている。このときの突き上げ量は適
宜選択されるが、前面ガラス（２）の変形による応力が
ガラスの弾性限界内になるようにとどめるべきである。FIG. 1 shows a state in which the front glass is adhered to the jig (1). The front glass (2) is held at four peripheral portions by stoppers (3), and the central portion has a pressing screw (4).
Has been pushed up by. The amount of push-up at this time is appropriately selected, but the stress due to the deformation of the front glass (2) should be kept within the elastic limit of the glass.
例えば８インチの陰極線管の場合、前面ガラスの長辺の
長さ140mm厚さ4.5mmに対し、突き上げ量は約0.25mmであ
る。For example, in the case of an 8-inch cathode ray tube, the length of the long side of the front glass is 140 mm and the thickness is 4.5 mm, but the thrust amount is about 0.25 mm.
第２図は更に陰極線管バルブ（５）を治具（１）に装着
し、シリコーン等の透明度の良い熱硬化性樹脂（６）を
注入口（７）より注入した状態を示す。注入後、130℃
で30分間加熱し、樹脂（６）がほぼ硬化した頃を見計ら
ってストッパー（３）を取り除く。第３図はストッパー
（３）部の拡大図で、ストッパー（３）はくさび状の棒
（31）（32）を抱き合わせたもので、最初に棒（31）を
除去し、次に棒（32）を除去する。FIG. 2 shows a state in which the cathode ray tube valve (5) is further mounted on the jig (1), and a thermosetting resin (6) having good transparency such as silicone is injected through the injection port (7). 130 ° C after injection
After heating for 30 minutes, remove the stopper (3) at the time when the resin (6) is almost cured. FIG. 3 is an enlarged view of the stopper (3) part. The stopper (3) is a combination of wedge-shaped rods (31) and (32). First, the rod (31) is removed, and then the rod (32). ) Is removed.
治具から前面ガラスのついた陰極線管を取出し、ガラス
の変形量を測定したところ、0.02mmであった。このよう
に前面ガラス表面の引っ張り応力は従来の方法によるも
のに比べて小さい。When the cathode ray tube with the front glass was taken out from the jig and the amount of deformation of the glass was measured, it was 0.02 mm. Thus, the tensile stress on the front glass surface is smaller than that of the conventional method.
［発明の効果］ 以上の通り、本発明によれば前面ガラスの残留応力が減
少し、前面ガラスの割れが減少する。[Advantages of the Invention] As described above, according to the present invention, the residual stress of the front glass is reduced and the cracks of the front glass are reduced.
第１図乃至第３図は本発明の製造方法を説明する図であ
る。 （１）……治具 （２）……前面ガラス （３）……ストッパー （４）……押圧用ネジ （５）……陰極線管バルブ （６）……熱硬化性樹脂1 to 3 are views for explaining the manufacturing method of the present invention. (1) …… Jig (2) …… Front glass (3) …… Stopper (4) …… Pressing screw (5) …… Cathode ray tube valve (6) …… Thermosetting resin
Claims (1)
する板状の前面ガラスを、陰極線管バルブの凸面と対向
するように凸状に反らした状態で保持する工程と、 この前面ガラスから所定間隔離れた位置に陰極線管バル
ブを、その凸面が前面ガラスと対向するように配設する
工程と、 陰極線管バルブの凸面と前面ガラスとの間に硬化性樹脂
を注入する工程と、 硬化性樹脂がほぼ硬化した後、前面ガラスを凸状に反ら
した保持状態を解除する工程とを有することを特徴とす
る前面ガラス付き陰極線管の製造方法。1. A step of holding a plate-shaped front glass disposed on the front surface of a cathode ray tube bulb having a convex surface in a state of being convexly warped so as to face the convex surface of the cathode ray tube bulb, and from this front glass A step of disposing the cathode ray tube bulb at a position separated by a predetermined distance so that its convex surface faces the windshield; a step of injecting a curable resin between the convex surface of the cathode ray tube bulb and the windshield; And a step of releasing the holding state in which the front glass is warped in a convex shape after the resin is substantially cured, the method for producing a cathode ray tube with a front glass.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19200886A JPH0682537B2 (en) | 1986-08-19 | 1986-08-19 | Method for manufacturing cathode ray tube with front glass |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19200886A JPH0682537B2 (en) | 1986-08-19 | 1986-08-19 | Method for manufacturing cathode ray tube with front glass |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6348726A JPS6348726A (en) | 1988-03-01 |
| JPH0682537B2 true JPH0682537B2 (en) | 1994-10-19 |
Family
ID=16284069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19200886A Expired - Lifetime JPH0682537B2 (en) | 1986-08-19 | 1986-08-19 | Method for manufacturing cathode ray tube with front glass |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0682537B2 (en) |
-
1986
- 1986-08-19 JP JP19200886A patent/JPH0682537B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6348726A (en) | 1988-03-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |