KR100189413B1 - A method and a device of coupling frame with mask in crt - Google Patents

Abstract

The present invention relates to a method and apparatus for combining a mask and a frame, including fitting the frame 60 to the lower die 30, placing the mask 10 on the lower jig 31, and the upper jig 40. ) Is lowered to fix the mask 10, the lower die 30 is raised to form the mask 10, and the upper die 20 is lowered to contact the upper surface of the mask 10. And, welding the frame 60 and the mask 10, welding and then cutting the frame 60 and the mask 10, cutting the edge 11 of the mask 10, and then cutting the upper portion. Die 20 is raised, the lower surface of the upper die 20 is formed with a concave surface 22, the upper surface of the lower die 30, a horizontal surface 32 is formed, the frame Forming a mask having a locking jaw 52 formed on the inner surface of the lower jig 50 so as to support the 60, forming a mask By reducing the workmanship to reduce the work, while preventing the springback phenomenon to improve the product quality.

Description

Method and device for combining frame and mask for cathode ray tube

1 is a cross-sectional view showing a state of forming a conventional mask,

(a) is a state in which the flat mask is placed on the lower die,

(b) the mask is fixed by the jig,

(c) is the state that the mask is pressed by the upper and lower dies,

(d) is a state in which the upper die is lowered to form a mask,

(e) is a state in which the upper die is completely lowered to complete the forming of the mask material,

2 is a cross-sectional view showing a method of combining the mask and the frame of the present invention,

(a) is the frame is fitted to the lower die,

(b) indicates that the mask is placed on the lower jig,

(c) the upper jig is lowered to fix the mask,

(d) shows a state in which the lower die is raised to form a mask with a predetermined curvature,

(e) is the state that the upper die is lowered and in contact with the upper surface of the mask,

(f) is the state of welding the frame and mask,

(g) is the state of cutting after welding the frame and mask,

(h) is the upper die is raised after cutting the edge of the mask,

(i) is the lower die is lowered,

(j) shows a state in which the combined mask and frame are separated from the lower die.

* Explanation of symbols for the main parts of the drawings

10 mask 11 border portion

20: upper die 22: concave surface

30: lower die 32: horizontal plane

40: upper jig 50: lower jig

60: frame

The present invention relates to a method and apparatus for combining a frame and a mask for a cathode ray tube, in particular to be able to combine the frame and the mask without a separate forming process.

In general, the cathode ray tube is equipped with various components. In view of the main components, a panel is installed on the front of the cathode ray tube, a mask is installed inside the panel, and an electron beam is located inside the neck portion of the cathode ray tube. An electron gun for firing is provided, and a deflection yoke is provided outside the neck portion.

Here, the mask provided on the inside of the panel is to pass through the electron beam emitted from the electron gun to be landed on the inner peripheral surface of the panel in place, requires great care when forming the mask.

Conventionally, the frame is attached as a medium that connects to the panel in the form of the mask, and the forming process of the mask is as follows.

That is, the upper die 20 and the lower die 30 are provided to form the mask 10 as shown in FIG. 1 of the accompanying exemplary drawings, and the upper and lower dies 20 and 30 are operated cylinders, respectively. (21,31) In addition, the upper and lower dies 20 and 30 are provided with upper and lower jigs 40 and 50, respectively, and the upper and lower jigs 40 and 50 are provided with guide rods 41 and 51, respectively.

The upper die 20 is convex, and the lower die 30 is concave.

In the conventional mold apparatus configured as described above, the upper die as shown in (b) of FIG. 1 is placed on the lower jig 50 with the mask 10 placed thereon as shown in (a) of FIG. 1 of the accompanying drawings. The upper die 20 is lowered by the operation cylinder 21 provided at 20. Then, as shown in FIG. 1 (c), the lower die 30 is also slightly raised, and the upper and lower jigs 40 and 50 are in contact with each other, so that the mask 10 placed on the lower die 30 is placed. It is fixed. Subsequently, as shown in FIG. 1d, the lower die 30 descends and the upper die 20 descends to form the mask 10. Then, finally, the lower die 30 is completely lowered, and the upper die 20 is further lowered to complete the forming of the mask 10. The formed disk 10 is welded to the frame to join the panel.

Here, the mask 10 has a problem that the material is mainly made of Invar, so that the springback phenomenon occurs because the edge portion 11 of the mask 10 is formed, thereby deteriorating the characteristics of the peripheral portion of the cathode ray tube.

Accordingly, an object of the present invention is to provide a cathode ray tube frame and a mask joining method and apparatus, which are designed to solve the above problems and form a mask without enveloping and directly joining the frame.

The present invention for achieving the above object is the step of fitting the frame to the lower die, the step of placing the mask on the lower jig, the upper jig is lowered to secure the mask, and the lower die is raised to contact the mask And the upper die is lowered to contact the upper surface of the mask, the step of welding the frame and the mask, the welding and cutting of the frame and the mask, and the cutting of the edge of the mask and then the upper die being raised And lowering the lower die and separating the combined mask and frame from the lower lower die.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

The same components as in the prior art will be described with the same reference numerals.

The present invention includes the steps of fitting the frame 60 to the lower die 30, placing the mask 10 in the lower jig 31, and the upper jig 40 is lowered to secure the mask 10 And the lower die 30 is raised to form the mask 10 to a predetermined curvature, the upper die 20 is lowered to contact the upper surface of the mask 10, the frame 60 and the mask. Welding (10), welding and then cutting the frame (60) and the mask (10), cutting the edge (11) of the mask (10) and then raising the upper die (20) And a step of lowering the lower die 30 and separating the combined mask 10 and the frame 60 from the lowered lower die 30.

When welding the mask 10 and the frame 60, it is preferable to perform laser welding. In the case of resistance welding, since a certain pressure must be applied due to the characteristics of the welding, the shape of the mask may be deformed.

In addition, since precise and clean processing is required even when cutting the edge portion 11 of the mask 10, it is also preferable to perform laser welding.

Meanwhile, in the present invention, the concave surface 22 is formed at the lower end of the upper die 20, the horizontal surface 32 is formed on the upper surface of the lower die 30, and can support the frame 60. The locking jaw 52 is formed on the inner surface of the lower jig 50 so as to be formed.

Since the present invention as described above can be placed in the mask 10 and the frame 60, then the mask 10 can be bent to a predetermined curvature and then directly welded and combined with the frame 60. Springback can be prevented in advance, and the mask is not required to be formed separately and welded and combined with the frame separately, which reduces labor and improves overall productivity.

Claims (2)

In the method of coupling the mask 10 and the frame 20, the step of fitting the frame 60 to the lower die 30, the step of placing the mask 10 in the lower jig 50, the upper jig ( 40 is lowered to fix the mask 10, the lower die 30 is raised to form the mask 10, the upper die 20 is lowered to contact the upper surface of the mask 10 Step, welding the frame 60 and the mask 10, welding and then cutting the frame 60 and the mask 10, cutting the edge 11 of the mask 10 A step of raising the upper die 20, a step of lowering the lower die 30, and separating the combined mask 10 and the frame 60 from the lowered lower die 30; Method of combining the frame and mask for cathode ray tubes. An upper die 20 and a lower die 30, the upper jig 40 is provided on the outside of the upper die 20, the lower jig 50 is provided with a lower jig 50 is equipped with a frame for the cathode ray tube In the device for coupling the 60 and the mask 10, the concave surface 22 is formed at the lower end of the upper die 20, the horizontal surface 32 is formed on the upper surface of the lower die 30 And a latching jaw (52) is formed on an inner surface of the lower jig (50) to support the frame (60).