Cutting device for shadow mask support

A cutting device and shadow mask technology, applied in the manufacture of discharge tubes/lamps, discharge tubes, electrical components, etc., can solve problems such as low work efficiency, time-consuming loading and unloading, and increased processing time, and achieve the effect of reducing equipment costs
CN1516217AInactive Publication Date: 2004-07-28PANASONIC CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
PANASONIC CORP
Publication Date
2004-07-28
Estimated Expiration
Not applicable · inactive patent

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Abstract

After assembling a framework 10 in an approximately rectangular form, a basis plane 17 is formed by grinding a bottom surface of the framework. Then, ends of two opposing sides 12a and 12b of the framework on a side opposite to the basis plane are cut in a predetermined shape by shearing. The grinding can be carried out by placing the framework on a grinding surface that is running, while applying substantially no pressurizing force other than the self weight of the framework. According to this method, precision of forming end faces of a framework on which a shadow mask is mounted can be improved. Also, working time can be shortened.
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Description

technical field

[0001] The present invention relates to a shearing device for a shadow mask frame of a cathode ray tube. In particular, the present invention relates to a device for processing the mounting end surface of a shadow mask, which can be manufactured with extremely high precision when, for example, the ends of the double-sided brackets facing the frame are processed into a curved shape to erect the shadow mask. Cylindricity and curvature of the cylindrical surface formed by the shadow mask surface. Background technique

[0002] The shadow mask is generally erected on a frame assembled into a rectangle by means of welding, etc., and installed in the cathode ray tube. The frame is generally configured such that a pair of long side frames are horizontally secured to upper and lower ends of a pair of spaced apart vertically arranged short side frames. Therefore, the shadow mask is mounted on the screen side ends of the pair of long side frames.

[0003] The shadow ...

Claims

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