JPH021310B2 - - Google Patents
Info
- Publication number
- JPH021310B2 JPH021310B2 JP56085412A JP8541281A JPH021310B2 JP H021310 B2 JPH021310 B2 JP H021310B2 JP 56085412 A JP56085412 A JP 56085412A JP 8541281 A JP8541281 A JP 8541281A JP H021310 B2 JPH021310 B2 JP H021310B2
- Authority
- JP
- Japan
- Prior art keywords
- glass
- face plate
- mold
- cover glass
- pieces
- 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
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Description
【発明の詳細な説明】
本願はフランジがなく、ガラス面板の端部に丸
みを有する表示管用箱形カバーガラスに関する。DETAILED DESCRIPTION OF THE INVENTION The present application relates to a box-shaped cover glass for a display tube without flanges and having rounded edges of the glass face plate.
従来、表示管用カバーガラスは第１図に示すよ
うな成形型を用いて製造されていた。即ち１枚の
ガラス板４を下型１に戴置し、周辺部を中型２で
挟圧しながら加熱し、上型３で加圧成形するもの
である。第２図に示すように成形されたカバーガ
ラスは中型２と下型１で挟圧したガラス板周辺部
がフランジ５として残る。このフランジ５は表示
視野を広くしようとした場合大きな妨げとなる。
改良策として第３図に示すような箱形カバーガラ
スが堤案されている。これはガラス面板６の周辺
部に板ガラスを切断して作つたガラス細片７，
８，８′等をフリツトガラス９を溶着して側壁部
を形成するもので、第２図に示したフランジ付き
のカバーガラスと違つてフランジを有しないた
め、表示視野を広く取れるという長所があつた。
しかし、この箱形カバーガラスの大きな欠点は、
ガラス細片同士そしてガラス細片とガラス面板と
の溶着にフリツトガラスを用いなければならない
という点である。フリツトガラスの機械的強度は
一般のガラスに比べると１／２と弱いためフリツ
トガラス溶着部がこのように多くなるということ
は信頼性に劣る。 Conventionally, cover glasses for display tubes have been manufactured using a mold as shown in FIG. That is, one glass plate 4 is placed on a lower mold 1, the peripheral part is heated while being pressed with a middle mold 2, and pressure molded with an upper mold 3. In the cover glass formed as shown in FIG. 2, the periphery of the glass plate pressed between the middle mold 2 and the lower mold 1 remains as a flange 5. This flange 5 becomes a big hindrance when trying to widen the display field of view.
As an improvement measure, a box-shaped cover glass as shown in Figure 3 has been proposed. This is a glass strip 7 made by cutting a plate glass around the glass face plate 6,
8, 8', etc. are welded to a fritted glass 9 to form a side wall. Unlike the flanged cover glass shown in Fig. 2, it does not have a flange, so it has the advantage of widening the display field of view. .
However, the major drawback of this box-shaped cover glass is that
The point is that fritted glass must be used to weld the glass strips together and the glass strips to the glass face plate. Since the mechanical strength of frit glass is 1/2 weaker than that of ordinary glass, having such a large number of welded parts of frit glass is poor in reliability.
本発明の目的はこのようにフリツトガラスを用
いずにガラス面板に側壁部を設け、ガラス面板の
端部に凸部を設け、従来の箱形カバーガラスと同
等の広視野を有した即ちフランジを有しないカバ
ーガラスを提供することにある。 The object of the present invention is to provide a glass face plate with a side wall portion without using fritted glass, a convex portion on the end of the glass face plate, and to have a wide field of view equivalent to that of a conventional box-shaped cover glass, that is, to have a flange. The purpose is to provide a cover glass that does not.
本発明の要旨とするところは、ガラス面板とガ
ラス個片を戴置した下型と小溝を設けた上型とで
ガラス個片とガラス面板周辺部を局部的に加熱溶
着すると共に、側壁部を加熱成形するもので、本
願の表示管用カバーガラスは、ガラス面板の端部
にバリがなく、丸みを帯び、人身に傷つけること
がなく安全性が高く、外観上も信頼性の点におい
ても秀れた箱形カバーガラスを得ることができ
る。 The gist of the present invention is to locally heat-weld the individual glass pieces and the periphery of the glass face plate using a lower mold on which the glass face plate and individual glass pieces are placed, and an upper mold provided with small grooves, and to weld the glass pieces and the periphery of the glass face plate locally. The cover glass for display tubes of the present application has no burrs on the edges of the glass face plate, is rounded, does not cause injury to humans, is highly safe, and has excellent appearance and reliability. A box-shaped cover glass can be obtained.
以下、実施例を図面に基づいて説明する。第４
図は本発明による成形型で材質は黒鉛でできてい
る。 Examples will be described below based on the drawings. Fourth
The figure shows a mold according to the present invention, which is made of graphite.
下型１０にはガラス個片を戴置する溝１１，１
１′を設けてあり、又箱形カバーガラスの内高を
規制し、ガラス個片を戴置しやすいように凸部１
２を設けてある。この凸部１２には成形されたカ
バーガラスと下型の離れを容易にするためテーパ
ーをつけてある。又、下型の内側は、ガラス面板
全体を加熱しないようにくり抜いてある。上型１
３はカバーガラスのガラス面板の端部に相当する
部分に成形時にバリが生じないよう小溝１４が設
けてある。小溝１４の形状は第５図，第６図のよ
うに半円形、台形に限定するものでなく第７図に
示すような形状でも同等の効果がある。上型も下
型と同様ガラス面板全体を加熱しないよう内側を
くり抜いてある。 The lower mold 10 has grooves 11, 1 in which individual pieces of glass are placed.
1' is provided, and a convex portion 1 is provided to regulate the inner height of the box-shaped cover glass and to make it easier to place individual pieces of glass.
2 is provided. The convex portion 12 is tapered to facilitate separation of the molded cover glass and the lower mold. Moreover, the inside of the lower mold is hollowed out so as not to heat the entire glass face plate. Upper mold 1
3, a small groove 14 is provided in a portion corresponding to the end of the glass face plate of the cover glass to prevent burrs from forming during molding. The shape of the small groove 14 is not limited to a semicircle or a trapezoid as shown in FIGS. 5 and 6, but the same effect can be achieved even if the shape is shown in FIG. 7. Like the lower mold, the upper mold is hollowed out on the inside to avoid heating the entire glass face plate.
前述の成形型の下型１０の溝１１，１１′に第
８図に示すようなガラス個片１５，１５′，１６
等を戴置し、この上にガラス面板１７を戴置す
る。ガラス個片１５，１６等の高さは下型の凸部
１２の高さより若干露出するように、又、ガラス
個片の長さは溝１１の長さになるように切断、準
備しておく。ガラス部品を戴置し、その上に上型
１３を戴置し通電加熱あるいは高周波加熱を行
う。加熱はカーボン成形型の酸化防止のため窒素
ガス雰囲気中で行なわれる。これらの加熱方法は
主にカーボン型のみ昇温させるためガラス面板１
７の表示面に相当する部分は外観上、平坦度を損
うことはない。温度上昇と共にガラス個片１５，
１５′は熱膨張により伸び、温度がガラスの軟化
温度に達すればガラス個片１６，１６′と溶着し、
ガラス個片１５，１５′，１６，１６′とガラス面
板１７は上型１３を加圧することにより溶着され
る。ガラス面板１７が加圧されると、加圧により
ガラス面板１７の一部が上型の小溝１４に押し出
される。成形されたカバーガラスは第９図に示す
ように表示面に相当するガラス面の端部が半円状
になり、人身に傷つけることもなく、外観上もき
れいな箱形カバーガラスが製造できる。 Glass pieces 15, 15', 16 as shown in FIG.
etc., and a glass face plate 17 is placed thereon. Cut and prepare the individual glass pieces 15, 16, etc. so that the height is slightly higher than the height of the convex part 12 of the lower mold, and the length of the individual glass pieces is the same as the length of the groove 11. . A glass component is placed, an upper mold 13 is placed thereon, and electrical heating or high frequency heating is performed. Heating is performed in a nitrogen gas atmosphere to prevent oxidation of the carbon mold. These heating methods mainly raise the temperature of only the carbon type, so the glass face plate 1
The flatness of the portion corresponding to the display surface 7 is not impaired in appearance. As the temperature rises, the glass pieces 15,
15' expands due to thermal expansion, and when the temperature reaches the softening temperature of the glass, it is welded to the individual glass pieces 16, 16'.
The individual glass pieces 15, 15', 16, 16' and the glass face plate 17 are welded together by applying pressure to the upper mold 13. When the glass face plate 17 is pressurized, a part of the glass face plate 17 is pushed out into the small groove 14 of the upper mold. As shown in FIG. 9, the molded cover glass has a semicircular end portion of the glass surface corresponding to the display surface, so that a box-shaped cover glass that does not cause injury to humans and has a beautiful appearance can be manufactured.
本願は、ガラス板とガラス片を加熱溶着する方
法で成形型の上型に小溝を設けることにより、バ
リがなく、信頼性が優れ、外観上も優れた箱型カ
バーガラスを堤供するものである。従つて、特に
安全性、高信頼性を要求される表示管のカバーガ
ラスとして適す。 This application provides a box-shaped cover glass that is free from burrs, has excellent reliability, and has an excellent appearance by providing a small groove in the upper die of the mold by heat-welding the glass plate and the glass piece. . Therefore, it is particularly suitable as a cover glass for display tubes that require safety and high reliability.
第１図は従来のフランジ付きカバーガラスの成
形型を示す断面図、第２図はこの型で成形したカ
バーガラスの斜視図、第３図は従来公知のフラン
ジを有しない箱形カバーガラスの斜視図、第４図
は本願による成形型を示す断面図、第５図、第６
図、第７図は小溝の形状を示す断面図、第８図は
ガラス面板ガラス個片の相対位置を示す斜視図、
第９図は本願により成形されたカバーガラスの一
部断面斜視図。
１……下型、２……中型、３……上型、４……
ガラス板、５……フランジ、６……ガラス面板、
７，８……ガラス細方、９……フリツトガラス、
１０……下型、１１，１１′……溝、１２……凸
部、１３……上型、１４……小溝、１５，１５′，
１６，１６′……ガラス個片、１７……ガラス面
板。
Fig. 1 is a sectional view showing a conventional mold for a cover glass with flanges, Fig. 2 is a perspective view of a cover glass molded with this mold, and Fig. 3 is a perspective view of a conventionally known box-shaped cover glass without flanges. Figures 4 and 4 are sectional views showing the mold according to the present application, Figures 5 and 6.
7 is a sectional view showing the shape of the small groove, and FIG. 8 is a perspective view showing the relative position of the glass pieces of the glass face plate.
FIG. 9 is a partially sectional perspective view of a cover glass molded according to the present invention. 1...Lower mold, 2...Middle mold, 3...Upper mold, 4...
Glass plate, 5... flange, 6... glass face plate,
7, 8...Glass thin, 9...Flit glass,
10...Lower die, 11, 11'...Groove, 12...Protrusion, 13...Upper die, 14...Small groove, 15, 15',
16, 16'... Individual glass pieces, 17... Glass face plate.
Claims (1)
ガラス片を加熱溶着して側壁を設けた箱形の表示
管用カバーガラスにおいて、前記ガラス面板の他
方の面の周囲に前記加熱溶着によつて設けられた
突出した丸みを有することを特徴とする表示管用
カバーガラス。1. In a box-shaped cover glass for a display tube in which a side wall is provided by heat welding a glass piece around one side of the glass face plate constituting the display surface, a side wall is provided around the other side of the glass face plate by the heat welding. A cover glass for a display tube characterized by having a protruding roundness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8541281A JPS57200084A (en) | 1981-06-03 | 1981-06-03 | Cover glass for indication tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8541281A JPS57200084A (en) | 1981-06-03 | 1981-06-03 | Cover glass for indication tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57200084A JPS57200084A (en) | 1982-12-08 |
| JPH021310B2 true JPH021310B2 (en) | 1990-01-11 |
Family
ID=13858083
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8541281A Granted JPS57200084A (en) | 1981-06-03 | 1981-06-03 | Cover glass for indication tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57200084A (en) |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5188064A (en) * | 1975-01-29 | 1976-08-02 |
-
1981
- 1981-06-03 JP JP8541281A patent/JPS57200084A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57200084A (en) | 1982-12-08 |
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