JPH0465051A - Manufacture of projection type cathode ray tube - Google Patents
Manufacture of projection type cathode ray tubeInfo
- Publication number
- JPH0465051A JPH0465051A JP14874390A JP14874390A JPH0465051A JP H0465051 A JPH0465051 A JP H0465051A JP 14874390 A JP14874390 A JP 14874390A JP 14874390 A JP14874390 A JP 14874390A JP H0465051 A JPH0465051 A JP H0465051A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- tension band
- cathode ray
- ray tube
- projection type
- 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.)
- Granted
Links
Landscapes
- Manufacture Of Electron Tubes, Discharge Lamp Vessels, Lead-In Wires, And The Like (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はテンションバントのような補強構体を有する投
射形ブラウン管の製造方法（、；関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a projection cathode ray tube having a reinforcing structure such as a tension band.
一般にブラウン管においては、パネルの破壊に対する補
強用もしくはセットに固定するための金具の取付用とし
て、パネル部外側面に補強構体を装着しである。In general, in cathode ray tubes, a reinforcing structure is attached to the outer surface of the panel part for reinforcing the panel against breakage or for attaching metal fittings for fixing it to the set.
他方、上記パネル部は、通常成形加工によって形成され
るため、成形時の土槽と下型との合わせ目に相当する位
置に、いわゆるモールド・マッチによる突起部が形成さ
れる。On the other hand, since the panel portion is usually formed by a molding process, a so-called mold match protrusion is formed at a position corresponding to the seam between the soil tank and the lower mold during molding.
第ｊ−図ＬＸ′、従来用いられているこの種の投射形ブ
ラウン管を示す、同図において、フェース面Ｊを有する
パネル部２と）７ンネル部３とは、溶着線４において溶
着されてバルブを構成１．５でいる。Figure J-LX' shows a conventionally used projection type cathode ray tube of this kind. In the same figure, a panel part 2 having a face surface J and a channel part 3 are welded together at a weld line 4 to form a bulb. The configuration is 1.5.
該パネル部２の外側面には、４箇所のコーナ部のそ拉ぞ
れにセット取付用の金具５を具備したテンションバント
６が巻回し、である。このテンションバンド６は、第２
図に示すように、前記パネル部２の外側面に巻回した粘
着アープ７の上に焼嵌め方式により装着しである。また
、該パネル部２の外側面には、通常モールド・マッチに
よる突起部８が０．１−０．２ｏｌ［ｌｌ程度突出して
いる。A tension band 6 is wound around the outer surface of the panel portion 2, and is provided with metal fittings 5 for set attachment at each of four corner portions. This tension band 6
As shown in the figure, it is attached onto the adhesive arc 7 wound around the outer surface of the panel section 2 by shrink fitting. Further, on the outer surface of the panel portion 2, a protrusion 8 usually formed by a mold match protrudes by about 0.1 to 0.2 ol [ll].
上記構成な有する投射形ブラウン管において、突起部８
はフェース面Ｊから１０画程度の所にあり、またデンシ
ョンバン３６は約１６圃の幅を有し、そのファンネル側
終端はフェース面から約２０ｍの位置にあるため、前記
突起部８は、丁度テンションバンド６の下にある。二と
になる。従って。In the projection type cathode ray tube having the above configuration, the protrusion 8
is located approximately 10 meters from the face surface J, and the tension bump 36 has a width of approximately 16 fields, and its funnel-side end is approximately 20 meters from the face surface, so the protrusion 8 has just the tension. It is below band 6. It becomes two. Therefore.
焼嵌め方式によって高温で伸びたテンションバンド６を
パネル部２に嵌める際、突起部８をこすりながら入り、
該突起部８に傷を付ける。また、テンションバンド６が
冷えて収縮する際、該突起部８に集中的な応力が加わっ
て該突起部を傷付け、これらの傷に起因するクラックが
、ブラウン管動作時にバルブに生じるクラック全体の２
５％程度を占めていた。When fitting the tension band 6 that has been stretched at high temperature into the panel part 2 using the shrink fitting method, insert it while rubbing the protrusion 8.
The protrusion 8 is scratched. In addition, when the tension band 6 cools and contracts, concentrated stress is applied to the protrusion 8, damaging the protrusion, and cracks caused by these scratches account for 2 of the total cracks that occur in the bulb during operation of the cathode ray tube.
It accounted for about 5%.
本発明は以上のような状況に鑑みてなされたものであり
、その目的は、テンションバンド装着時にパネル部に傷
を与えることを防いでバルブクラックを減らすことが可
能な投射形ブラウン管の製造方法を提供することにある
。The present invention has been made in view of the above circumstances, and its purpose is to provide a method for manufacturing a projection type cathode ray tube that can prevent damage to the panel part and reduce bulb cracks when the tension band is attached. It is about providing.
このうな目的を達成するするために、本発明による投射
形ブラウン管の製造方法は、パネル部成形時に生ずるモ
ールド・マッチによる突起部を加工し、その突起部の高
さを低くした後、補強楕体を装着するようにしたもので
ある。以下、実施例を用いて本発明による投射形ブラウ
ン管の製造方法を詳細に説明する。In order to achieve such an object, the method of manufacturing a projection type cathode ray tube according to the present invention involves processing the protrusions caused by the mold match that occur when molding the panel part, reducing the height of the protrusions, and then forming a reinforcing ellipse. It is designed so that it can be worn. Hereinafter, the method for manufacturing a projection type cathode ray tube according to the present invention will be explained in detail using Examples.
第３図は本発明の方法により製造された投射形ブラウン
管の一例を示す断面図である。同図において、パネル部
２の外側面に、粘着テープ７を巻回し、その上からテン
ションバンド６を焼嵌めによって嵌込んである。該テン
ションバンド６は、幅が約１６ｍｍであり、そのファン
ネル側端面ばフェース面１からほぼ２０ｍａの位置にあ
る。一方、パネル部２の外側面にはモールド・マッチ部
９がテンションバンド６の下に形成されているが、該モ
ールド・マッチ部９は補強構体装看前に突起部を焼き丸
めて除去しである。従って、テンションバンド６を嵌め
る際に突起部が傷付くこともなく、該テンションバンド
６の収縮時に突起部に応力集中が起こることもない。FIG. 3 is a sectional view showing an example of a projection type cathode ray tube manufactured by the method of the present invention. In the figure, an adhesive tape 7 is wound around the outer surface of the panel portion 2, and a tension band 6 is fitted onto the adhesive tape 6 by shrink fitting. The tension band 6 has a width of about 16 mm, and its funnel-side end surface is located approximately 20 mm from the face surface 1. On the other hand, a mold match part 9 is formed on the outer surface of the panel part 2 below the tension band 6, but the mold match part 9 cannot be removed by burning and rolling the protrusion before installing the reinforcing structure. be. Therefore, the protrusion will not be damaged when the tension band 6 is fitted, and stress concentration will not occur on the protrusion when the tension band 6 is contracted.
なお、前記突起部の高さは焼き丸めて低くする他に、研
磨等の方法により低くしても良いことは勿論である。In addition to reducing the height of the protrusion by baking and rolling it, it is of course possible to reduce the height by polishing or the like.
以上説明したように、本発明による投射形ブラウン管の
製造方法によれば、テンションバンドの下のモールド・
マッチによる突起部はその高さを低くしたことにより、
テンションバンド装着によってモールド・マッチ部に傷
が生じるのを防ぐことができ、従来バルブに発生するク
ランクの２５％程度を占めていたモールド・マッチ部に
起因するクラックを防止することが可能になるという優
れた効果を有する。As explained above, according to the method of manufacturing a projection type cathode ray tube according to the present invention, the mold under the tension band
By lowering the height of the protrusion caused by the match,
By installing a tension band, it is possible to prevent scratches on the mold/match part, making it possible to prevent cracks caused by the mold/match part, which accounted for about 25% of cracks that occur in conventional valves. Has excellent effects.
第１図および第２図は従来の投射形ブラウン管を示す正
面図および断面図、第３図は本発明の方法により製造さ
れた投射形ブラウン管の一例を示す断面図である。
１・・・・フェース面、２・・・・パネル部。
３°°°°ファンネル部、６・・・・テンション第１図
第３図1 and 2 are a front view and a sectional view showing a conventional projection type cathode ray tube, and FIG. 3 is a sectional view showing an example of a projection type cathode ray tube manufactured by the method of the present invention. 1...Face surface, 2...Panel part. 3°°°°Funnel part, 6...Tension Figure 1 Figure 3
Claims (1)
ン管の製造において、前記パネル部成形時のモールド・
マッチによる突起部の高さを低くする工程と、その後前
記突起部を含むパネル部外側面に補強構体を装着する工
程とを含むことを特徴とする投射形ブラウン管の製造方
法。1. In the production of projection type cathode ray tubes with a reinforcing structure attached to the outer surface of the panel, the mold and
A method for manufacturing a projection type cathode ray tube, comprising the steps of reducing the height of a protrusion using a match, and then attaching a reinforcing structure to the outer surface of a panel including the protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14874390A JPH0465051A (en) | 1990-06-08 | 1990-06-08 | Manufacture of projection type cathode ray tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14874390A JPH0465051A (en) | 1990-06-08 | 1990-06-08 | Manufacture of projection type cathode ray tube |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8573481A Division JPS57202048A (en) | 1981-06-05 | 1981-06-05 | Projection type cathode-ray tube |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0465051A true JPH0465051A (en) | 1992-03-02 |
| JPH0570249B2 JPH0570249B2 (en) | 1993-10-04 |
Family
ID=15459635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14874390A Granted JPH0465051A (en) | 1990-06-08 | 1990-06-08 | Manufacture of projection type cathode ray tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0465051A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5014114A (en) * | 1973-06-11 | 1975-02-14 | ||
| JPS57202048A (en) * | 1981-06-05 | 1982-12-10 | Hitachi Ltd | Projection type cathode-ray tube |
-
1990
- 1990-06-08 JP JP14874390A patent/JPH0465051A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5014114A (en) * | 1973-06-11 | 1975-02-14 | ||
| JPS57202048A (en) * | 1981-06-05 | 1982-12-10 | Hitachi Ltd | Projection type cathode-ray tube |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0570249B2 (en) | 1993-10-04 |
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