Expanded form mask for color Braun tube and its material
A stretching type, Braun's technology, applied in the manufacture of discharge tubes/lamps, discharge tubes, furnace types, etc., can solve problems such as increased vibration of grid components, low tensile strength, and large residual stress
Inactive Publication Date: 2004-07-07
DAI NIPPON PRINTING CO LTD +1
View PDF2 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
The tension-reduced grid element with such a large creep phenomenon and a small tension recovery rate has the following problem: when the volume of the speaker installed in the same casing as the colored Braun tube is increased, the vibration increases, and at this time the grid element Self-vibration becomes larger, causing the color deviation of the screen
[0006] Therefore, in order to solve these problems, in JP2548133 (B2), a color sorting mechanism made of a low-carbon steel plate containing 40ppm-100ppm nitrogen is described. In addition, in JP2683674 (B2), it is proposed to use a 2.0% (weight), Mo: 0.10-3.0% (weight) low-carbon steel plate, but because of the large residual stress, twisting occurs at the top of the open grid after heat treatment
[0007] In addition, JP799025 (A) (USP5552662) describes a method of manufacturing an open grid using a material with a small residual stress. However, since the tensile strength is small, the tension recovery rate is almost unchanged. Fragments are generated at the top of the top, and if the tension is stretched without fragments at the top, there is a problem that the stretching tension after heat treatment will decrease
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreExamples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0030] A low-carbon steel material with a thickness of 0.1 mm made of materials A to F with chemical composition expressed in weight percent in Table 1 is treated at a temperature of 540-560° C. for 45 seconds in a mixed atmosphere of hydrogen and nitrogen in a continuous annealing furnace , After annealing, apply a water-soluble casein protective film on both sides, and after drying, use a glass dry plate that draws a pair of front and back patterns on the protective film on both sides of the material to draw a pattern on the protective film. There are two types of pattern formation of the protective film: the opening direction of the slit formed by corrosion is parallel to and perpendicular to the rolling direction.
[0031] Then, perform exposure, hard film treatment, and low-temperature drying treatment, and then, on both sides of the patterned protective film, use a ferrous chloride solution with a liquid temperature of 60 ° C and a specific gravity of 48 ° Be as an etching ...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| length | aaaaa | aaaaa |
Login to View More
Abstract
A stretched mask having a high tensile strength and favorable high-temperature creep properties and free from tape twist, and a material for the stretched mask. A low-carbon steel sheet containing 70 ppm to 170 ppm of nitrogen on a weight basis is heat-treated at a temperature at which recrystallization does not take place. The heat-treated material is provided with a resist pattern for forming apertures and subjected to etching to form apertures.
Description
technical field [0001] The present invention relates to a stretched shadow mask for a color Braun tube which can be used for a Braun tube of any type such as a shadow mask type or an open grid type for a color display device of a color television or a computer. Background technique [0002] In a Braun tube for color televisions and color display devices, a shadow mask for color sorting is used to irradiate electron beams to predetermined phosphors. As the color selection mask, a mask made of a metal plate with many small holes or an open grid with many slits is used. When the color Braun tube is used continuously for a long time, the shadow mask or the opening grid is heated due to the collision of accelerated electrons, deformed due to thermal expansion, and then the position of the electron lines facing the fluorescent surface is deviated, so that the The color is deviated. [0003] In the shadow mask for color selection of color Braun tubes, a general-type shadow mask m...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C21D9/46C21D1/26C22C38/00C22C38/04C23F1/00H01J9/14H01J29/07
CPCH01J9/142Y10T428/12431H01J2229/0733Y10T428/12229H01J9/20
Inventor 牧田明松元丰佐藤台三渡边喜和
Owner DAI NIPPON PRINTING CO LTD