KR980011634A - Manufacturing method of explosion-proof band for cathode ray tube - Google Patents

Abstract

In the method of manufacturing an explosion-proof band for a cathode-ray tube, in manufacturing an explosion-proof band, welding is performed while the ends to be welded are separated from the glass surface without applying pressure to both ends without using an auxiliary member, thereby simplifying the manufacturing process, A method for manufacturing explosion-proof bands for a cathode-ray tube, the method comprising: cutting a strip member to a predetermined length; A step of forming the member in an outer peripheral shape of the sealing portion of the panel, and a step of positioning the formed member on the outer peripheral surface of the sealing main body of the panel and pulling both ends of the member with a constant force to weld both ends, To produce an explosion-proof band. And it can be simplified and it is possible to reduce the materials and equipment and the production efficiency is increased to improve productivity, and it is possible to ensure the reliability of the product.

Description

Manufacturing method of explosion-proof band for cathode ray tube

Since this is a trivial issue, I did not include the contents of the text.

FIG. 1 is a process diagram showing a process of manufacturing an explosion-proof band for a cathode ray tube according to an embodiment of the present invention.

FIG. 2 is a perspective view of an explosion-proof band according to an embodiment of the present invention.

FIG. 3 is an enlarged cross-sectional view of part A of FIG. 2.

FIG. 4 is a partially enlarged cross-sectional view showing an explosion-proof band produced by a conventional explosion-proof band manufacturing method.

DETAILED DESCRIPTION OF THE INVENTION [

[Industrial Applications]

The present invention relates to a method of manufacturing an explosion-proof band in a manufacturing process of a cathode ray tube, and more particularly, to a method of manufacturing an explosion-proof band without using a separate auxiliary member and without cracking on the glass surface of a cathode ray tube To an explosion-proof band manufacturing method for a cathode-ray tube.

[0003]

2, the panel P and the panel F are combined to form an outer shape of the body, a shadow mask is installed inside the body to perform a color sorting function, A deflection unit is installed to deflect the electron beams emitted from the electron gun vertically and horizontally to form a raster. The inside of the cathode ray tube is in a vacuum state to smooth the flow of electrons. Therefore, the cathode ray tube has a risk of rupturing the glass surface of the cathode ray tube due to the pressure difference with the atmospheric pressure, and for the safety of the surroundings due to the rupture. Thus, the cathode ray tube reduces the risk to firecrackers by installing a metal-brittle band with a high tensile force on the frit seal where the panel and the fennel are most dangerous. Conventionally, various methods have been proposed and adopted to manufacture an explosion-proof band of a conventional cathode ray tube. As shown in FIG. 4, an auxiliary member 106 is installed at both ends 102 and 104 of the band 100 The method of manufacturing the explosion-proof band 100 by welding the auxiliary member 106 and the end portions 102 and 104 is most widely used. The above method will be described in detail as follows. First, the free end of the band is turned completely around the side wall of the panel P of the cathode ray tube in the roll on which the metal band is wound to form the loop. The looped band is cut so that the end portions 102 and 104 face each other and the auxiliary member 106 is placed on top of both end portions 102 and 104. [ When the end portions 102 and 104 are joined to the auxiliary member 106 by spot welding, the manufacture of the explosion-proof band 100 of the cathode ray tube is completed.

[Problems to be solved by the invention]

However, the above-described method for manufacturing an explosion-proof band for a cathode ray tube has a problem that the manufacturing process is complicated and production efficiency is reduced due to manufacturing using a clip as a separate auxiliary member. Further, there is a problem that cracks are formed inside the glass surface by the pressure applied when the clip and the end portion are spot welded and the end portion contacting the glass surface. Therefore, the explosion-proof unit installed to prevent the fireworks of the cathode ray tube causes a problem that the fireworks of the cathode ray tube is triggered.

[MEANS FOR SOLVING THE PROBLEM]

SUMMARY OF THE INVENTION The present invention has been made to solve such conventional problems, and it is an object of the present invention to provide a method for manufacturing an explosion-proof band, in which an auxiliary member is not used and welding is performed while pressure is not applied to both ends, And a method for manufacturing explosion-proof bands for a cathode-ray tube that can prevent firecracking of a cathode ray tube by preventing the occurrence of cracks on the glass surface of the cathode ray tube.

In order to accomplish the above object, the present invention provides a method for manufacturing explosion-proof bands for a cathode-ray tube, comprising the steps of cutting a strip member to a predetermined length, a step of formonging the cut- And a step of welding the both ends of the member by pulling the both ends of the member with a constant force and welding the both ends.

[Action]

In the method of manufacturing an explosion-proof band for a cathode-ray tube, when welding both ends of the strip member, welding is performed without welding and the welding part is welded to the glass surface, so that the risk of fireballing of the cathode ray tube can be reduced because no crack occurs on the glass surface of the cathode ray tube. Reliability can be secured, manufacturing process is simple, production efficiency is increased, and productivity can be maximized.

In addition, it is possible to reduce the cost of materials by reducing the material and equipment without using a separate auxiliary device.

Example

Hereinafter, preferred embodiments of the present invention will be described in more detail with reference to the accompanying drawings. FIG. 1 is a process diagram showing a method for manufacturing an explosion-proof band according to an embodiment of the present invention. Referring to FIG. 1, the explosion-proof band manufacturing method of this embodiment will be described as follows. The cathode ray tube explosion-proof band manufacturing method of the present embodiment includes a first step of cutting the strip member 2 to a predetermined length and a second step of forming the cut strip member 2 on the outer periphery of the sealing portion of the panel P (2) is placed on the outer circumferential surface of the panel (P) and both end portions (4) and (6) of the member (2) are pulled by a constant force to abut each other, Process. In the first step, the strip member 2 is cut by a predetermined cutting means 8 at a length suitable for the size of the cathode ray tube 1. In the second step, the strip member 2 cut in the first step is formed into the same shape as the outer periphery of the sealing portion of the panel P of the cathode ray tube 1 by using a predetermined forming means. In the third step, in the second step, the formed strip member 2 is positioned on the sealing portion of the panel P, the opposite end portions 4 and 6 are pulled by a certain force to face each other, Is welded to a plasma welder (10) to complete the manufacture of the explosion-proof band (12). The explosion-proof band 12 manufactured by the above-described method is coupled as shown in FIG. 3, wherein the ends of the coupled end portions 4 and 6 are stretched while being reduced in width. Thus, when the end portions 4 and 6 are coupled, the joined portion forms the recess 14 of the crimped crimped portion on the upper and lower sides. Therefore, both end portions 4 and 6 are engaged while being separated from the glass surface. Since the end portions 4 and 6 are joined by prism welding, the end portions 4 and 6 are firmly engaged with each other and the end portions 4 and 6 do not protrude or fall off even when heat is applied. Further, since the end portions 4 and 6 are smoothly coupled to each other, the explosion-proof band 12 manufactured by the present embodiment can be collected and reused even when the cathode ray tube 1 is destroyed .

[effect]

As described above, the method for manufacturing an explosion-proof band for a cathode-ray tube of the present invention can simplify a manufacturing process, reduce materials and facilities when manufacturing explosion-proof bands, improve production efficiency by improving explosion- It is possible to secure the reliability of the product since the glass surface is not cracked.

[Object of the invention]

Claims (2)

A step of cutting the strip member 2 to a predetermined length; a step of forming the cut strip member 2 in the outer peripheral shape of the sealing portion of the panel P; And a step of welding both end portions (4) (6) of the member (2) by pulling the end portions (4) (6) with a constant force and welding the both end portions (4) (6). The method of claim 1, wherein both ends (4, 6) of the strip member (2) are coupled by plasma welding. ※ Note: It is disclosed by the contents of the first application.