CN100361260C - Spraying method for coating graphite inside picture tube neck - Google Patents
Spraying method for coating graphite inside picture tube neck Download PDFInfo
- Publication number
- CN100361260C CN100361260C CNB2004100262848A CN200410026284A CN100361260C CN 100361260 C CN100361260 C CN 100361260C CN B2004100262848 A CNB2004100262848 A CN B2004100262848A CN 200410026284 A CN200410026284 A CN 200410026284A CN 100361260 C CN100361260 C CN 100361260C
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- Prior art keywords
- picture tube
- spraying
- tube neck
- graphite
- cone
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Abstract
The present invention discloses a spraying method for spraying graphite in a picture tube neck. The internal surface and the external surface of a picture tube neck are cleaned with a mixed acid liquor prepared with nitric acid and hydrofluoric acid; high pressure air is charged into the picture tube neck, and the pressure is 0.2MPa; meanwhile, the picture tube neck is dried by an infrared heater, and the drying temperature is from 40 DEG C to 50 DEG C; firstly, a manual regulating valve is additionally arranged on a graphite pipeline of a spraying device, and the spraying pressure of an air power pump is regulated to 5MPa; secondly, a spraying chamber is provided with a protecting plug for protecting the picture tube neck, and the direction of the protecting plug is parallel to the spraying direction; finally, the inside graphite spraying starts by spraying the short edge of the picture tube neck, graphite mortar is uniformly sprayed on the internal surface of the picture tube neck through two fan nozzles, and the angle between the two fan nozzles is from 40 DEG to 50 DEG. The present invention improves the quality of products, reduces the consumption of picture tube necks, and lightens the personnel's labor intensity; the present invention particularly can reduce the graphite consumption in picture tube necks, and can reduce the production cost.
Description
Technical field
The present invention relates to the picture tube manufacturing technology, particularly the spraying method of graphitization in the color picture tube pipe awl.
Background technology
The manufacturing process of graphitization adopts the air force force lift to produce the high pressure of 5Mpa in the color display tube originally, produces rotary power with a rotary cylinder, interior graphitization breast is sprayed on uniformly the inner surface of cone along the long limit of cone by two fan nozzles.The technological requirement spray pressure is big, so will cause the quick decline of force feed pump pressure at the spraying process of short time, often cause the uniformity that is coated with in the awl to descend and cause the waste (awl will carry out applying second time to satisfy technological requirement, and the incidence of carrying out second coat is 20%) of bad and part graphite in the later stage of pump life cycle.Because original spraying method exists certain defect often to cause interior graphitization consumption to exceed standard, and affects the normal flowing water of production line, increase frequency and the labor intensity of operating staff of equipment maintenance.The graphite of waste is discharged into sewerage, also environment is had certain influence.
Summary of the invention
The object of the present invention is to provide and a kind ofly can improve product grade, reduce devices consume, alleviate personnel labor intensity, especially can reduce the consumption of graphitization in the cone, reduce the spraying method of the coating graphite inside picture tube neck of single tube cost.
The present invention realizes above purpose by the following technical solutions:
Carrying out earlier the picture tube cone cleans: by the mix acid liquor that nitric acid and hydrofluoric acid are mixed with, its volume ratio is 1: 1, and the surfaces externally and internally that picture tube is bored cleans, and cleans with pure water again;
Pressure-air is filled with the picture tube cone, pressure is 0.2MPa again, and infrared heater is dried 40-50 ℃ of its bake out temperature to the picture tube cone simultaneously;
Bore check again, the check of manually boring is determined qualified picture tube pipe awl by estimating;
Regulating air force pump spray pressure is 5MPa, carries out being coated with in the picture tube cone graphite;
It may further comprise the steps:
At first, at the graphite pipeline increase manual adjustments valve of spraying equipment, regulating air force pump spray pressure is 5MPa;
Secondly, in spray booth kinescope neck protection plug is installed, its direction is parallel to the coating direction;
At last, the spraying direction of interior graphitization sprays along the minor face of picture tube pipe cone, and aquadag is sprayed on the inner surface of picture tube cone uniformly by two fan nozzles.Angle between two nozzles is the 40-50 degree.
Embodiment
Below content of the present invention and operation principle are described in further detail:
Carrying out earlier the picture tube cone cleans: by the mix acid liquor that nitric acid and hydrofluoric acid are mixed with, its volume ratio is 1: 1, and the surfaces externally and internally that picture tube is bored cleans, and cleans with pure water again;
Pressure-air is filled with the picture tube cone, pressure is 0.2MPa again, and infrared heater is dried 40-50 ℃ of its bake out temperature to the picture tube cone simultaneously;
Bore check again, the check of manually boring is determined qualified picture tube pipe awl by estimating;
Regulating air force pump spray pressure is 5MPa, carries out being coated with in the picture tube cone graphite;
It may further comprise the steps:
At first, at the graphite pipeline increase manual adjustments valve of spraying equipment, regulating air force pump spray pressure is 5MPa;
Secondly, in spray booth kinescope neck protection plug is installed, its direction is parallel to the coating direction;
At last, the spraying direction of interior graphitization sprays along the minor face of picture tube pipe cone, and aquadag is sprayed on the inner surface of picture tube cone uniformly by two fan nozzles.Angle between two nozzles is the 40-50 degree.
The S face ring (face shaping of cone) of picture tube cone is an approximate rectangle, and length is 60 centimetres, and wide is 47 centimetres (29PF), long and wide approximate ratio 0.78.Coating method of the present invention carries out the cleaning of picture tube pipe awl earlier: by 500 liters of nitric acid and 500 liters of mix acid liquors that hydrofluoric acid is mixed with, the surfaces externally and internally that the picture tube pipe is bored cleans, and cleans with pure water again; It is the high pressure of 5Mpa that adjustment air force force lift makes its pressure, produce rotary power with a rotary cylinder, direction along the minor face of picture tube awl is rotated, the manual adjustments valve is regulated the output pressure of pump at any time, its pressure is controlled at 5MPa, cross in pump pressure and to open valve when low and make pressure return to 5MPa, stop spraying for the second time, thereby save part graphite.Interior graphitization breast is sprayed on uniformly the inner surface of picture tube awl by two fan nozzles.Infrared heater is dried, 45 ℃ of its bake out temperatures; Obviously just can save 22% interior graphitization as long as change the coating direction.Because the quantity of graphite of nozzle ejection is certain in the unit interval, and the swing speed in nozzle when spraying is approximately constant, the consumption of graphite just is directly proportional with spray distance when spraying then for the picture tube cone inner face, and namely the consumption of the long then graphite of spray distance is just high, otherwise consumption is just low.Because spraying method of the present invention sprays at the minor face to picture tube cone, long limit than before is sprayed on distance and has reduced 22%, corresponding 22% the interior graphitization of just having saved.Second time coating need not be carried out, correspondingly also part graphite can be saved; Installation direction to picture tube neck plug changes, and has reduced the shade that picture tube neck plug fixed lever forms at the awl inner face in the spraying process, the corresponding outward appearance grade that has also improved product.
Claims (2)
1, the spraying method of graphitization in the picture tube pipe awl comprises,
Carrying out earlier picture tube cone cleans: be the mix acid liquor that 1: 1 nitric acid and hydrofluoric acid are mixed with volume ratio, the surfaces externally and internally of picture tube cone is cleaned, clean with pure water;
Pressure-air is filled with the picture tube cone, pressure is 0.2MPa again, and infrared heater is dried 40-50 ℃ of its bake out temperature to the picture tube cone simultaneously;
Carry out the check of picture tube pipe awl again, determine qualified picture tube pipe awl by estimating;
It is characterized in that, proceed following steps:
At first, at the graphite pipeline increase manual adjustments valve of spraying equipment, regulating air force pump spray pressure is 5MPa;
Secondly, in spray booth kinescope neck protection plug is installed, its direction is parallel to the coating direction;
At last, carry out the spraying of interior graphitization, the spraying direction is carried out along the minor face of picture tube pipe cone, and aquadag is sprayed on the inner surface of picture tube cone uniformly by two fan nozzles.
2, the spraying method of graphitization in the picture tube pipe according to claim 1 awl is characterized in that, the angle between two nozzles is 40-50 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100262848A CN100361260C (en) | 2004-06-29 | 2004-06-29 | Spraying method for coating graphite inside picture tube neck |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100262848A CN100361260C (en) | 2004-06-29 | 2004-06-29 | Spraying method for coating graphite inside picture tube neck |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1595588A CN1595588A (en) | 2005-03-16 |
| CN100361260C true CN100361260C (en) | 2008-01-09 |
Family
ID=34663887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2004100262848A Expired - Fee Related CN100361260C (en) | 2004-06-29 | 2004-06-29 | Spraying method for coating graphite inside picture tube neck |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100361260C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110879509A (en) * | 2019-12-03 | 2020-03-13 | 深圳市思坦科技有限公司 | Gluing equipment and gluing method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4542038A (en) * | 1983-09-30 | 1985-09-17 | Hitachi, Ltd. | Method of manufacturing cathode-ray tube |
| JPH09330661A (en) * | 1996-06-07 | 1997-12-22 | Mitsubishi Electric Corp | Forming method of graphite film |
| CN1218972A (en) * | 1997-12-03 | 1999-06-09 | 松下电子工业株式会社 | Method for producing cathode ray tube |
| CN1453813A (en) * | 2003-05-19 | 2003-11-05 | 彩虹彩色显像管总厂 | Making process of black ground for color picture tube |
-
2004
- 2004-06-29 CN CNB2004100262848A patent/CN100361260C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4542038A (en) * | 1983-09-30 | 1985-09-17 | Hitachi, Ltd. | Method of manufacturing cathode-ray tube |
| JPH09330661A (en) * | 1996-06-07 | 1997-12-22 | Mitsubishi Electric Corp | Forming method of graphite film |
| CN1218972A (en) * | 1997-12-03 | 1999-06-09 | 松下电子工业株式会社 | Method for producing cathode ray tube |
| CN1453813A (en) * | 2003-05-19 | 2003-11-05 | 彩虹彩色显像管总厂 | Making process of black ground for color picture tube |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1595588A (en) | 2005-03-16 |
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| CF01 | Termination of patent right due to non-payment of annual fee |