JPH01320731A - Panel cleaner for color cathode-ray tube - Google Patents

Abstract

PURPOSE:To arrange the constitution such that the inner and outer faces of a skirt part and the pin part for stopping a mask do not become shadow for ultrasonic wave so as to clean a panel without nonuniformity by changing the advancing direction of ultrasonic waves which are irradiated upward from below a cleaner and hit against a reflection plate so as to hit them on the fronts of the outer and inner faces of the skirt part. CONSTITUTION:A panel 9 for color cathode-ray tube is held by a carrier head 11, and a cleaning vessel 1 is elevated so as to soak the skirt part 9a of the panel 9 in cleaning solution 8, and then a motor 10 is operated to rotate the panel 9. And a vibration plate 2 is vibrated by the action of a vibrator 3 so as to irradiate ultrasonic waves 12 upward from below by vibration of the vibration plate 2. The ultrasonic waves in this vertical direction bit on the seal face 9b of the panel 9 and the outer and inner reflection plates 5 and 7. Hereby, the seal face 9b is cleaned by the ultrasonic waves 12 in the vertical direction, and by the ultrasonic waves 12 hit on the reflection plates 5 and 7, the inner and outer faces of the skirt part 9a and the mask stopping pin 9c are cleaned.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an ultrasonic cleaning device for color cathode ray tube panels, and in particular removes graphite and phosphor from the skirt portion of the panel during the coating process. A suitable cleaning device is provided for this purpose.

[Conventional technology]

Conventional cleaning equipment immerses the skirt portion of the panel in a cleaning solution in a cleaning tank, and uses ultrasonic waves that are radiated vertically from below to the top to clean the sealing surface of the panel, the inner and outer surfaces of the skirt portion, and the mask. Remove the attached graphite and phosphor from the retaining pin.

[Problem to be solved by the invention]

Since the above conventional technology cleans using vertical waves, the sealing surface of the panel (this area is irradiated with strong and uniform ultrasonic waves, but the ultrasonic irradiation creates gaps in the inner and outer surfaces of the skirt part of the panel and the mask fixing pin part, so cleaning Unevenness occurs.As a result, a small amount of graphite or phosphor remains, causing mask holes to become clogged in the tube, resulting in defects,
There was a problem in that voltage resistance failure occurred.

SUMMARY OF THE INVENTION An object of the present invention is to provide a color cathode ray tube panel cleaning device that can simultaneously (and evenly) clean the sealing surface of the panel, the outer surface of the skirt portion, and the mask fixing pin portion.

[Means to solve the problem]

The above object is achieved by providing a reflector plate that irradiates the ultrasonic waves perpendicularly from the bottom to the top on the outer and inner surfaces of the skirt portion at approximately right angles.

[Effect]

The ultrasonic waves that are emitted from below to above and hit the reflector are
Change the direction of travel and hit the outer and inner surfaces of the skirt section from the front. As a result, the inner and outer surfaces of the skirt portion and the mask fixing pin portion are not shaded by ultrasonic irradiation and can be cleaned evenly.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. A diaphragm 2 is provided on the bottom side of the cleaning tank 1, and a plurality of oscillators 3 are attached to the diaphragm 20. Further, an inner wall plate 4 is fixed to the outer peripheral side of the diaphragm 2, and an outer reflecting plate 5 in the shape of a truncated cone whose upper part is inclined inward is fixed to the upper end of the inner wall plate 4. Further, a hollow support member 6 is fixed to the center of the diaphragm 2, and an inner reflection plate 7 in the shape of a truncated cone whose upper part is inclined to the outer side is fixed to the upper end of the support member 6. Therefore,
A space surrounded by the diaphragm 2, the inner wall plate 4, the outer reflector 5, the support member 6, and the inner reflector 7 forms a tank section in which the cleaning liquid 8 is stored. The panel 9 is held by a carrier head 11 which is rotated by a motor 10. Further, the cleaning tank 1 is configured to be vertically driven by a vertically moving means (not shown).

Next, this operation (I will explain the trick.The panel 9 is held by the carrier head 11, the cleaning tank 1 is raised, the skirt part 9a of the panel 9 is immersed in the cleaning liquid 8, and the motor 10 is activated to rotate the panel 9. Therefore, when the vibrator 3 is activated to vibrate the diaphragm 2, the vibration E of the diaphragm 2 causes the ultrasonic waves 12 to be radiated from below to above. The surface 9b hits the outer reflecting plate 5 and the inner reflecting plate 7. As a result, the sealing surface 9b is cleaned by the ultrasonic waves 12 in the vertical direction. The skirt portion 9a of the panel 9 changes its course in the horizontal direction.
Contact from the outer and inner surfaces (frontal force) of the skirt part 9
The inner and outer surfaces of a and the mask fixing pin 9C are cleaned.

Since the ultrasonic irradiation is performed in this manner (frontal force on the sealing surface 9b, the inner and outer surfaces of the skirt portion 9a, and the mask fixing pin 9cf, respectively), there is no shadow in the ultrasonic irradiation to each cleaning part, and the ultrasonic irradiation is evenly applied. Can be washed.

〔Effect of the invention〕

According to the present invention, the sealing surface, the inner and outer surfaces of the skirt part, and the mask fixing pin m can be cleaned evenly, so there is no remaining residual graphite or phosphor, and defects in mask hole filling and withstand voltage defects are reduced. do.

[Brief explanation of the drawing]

The figures show one embodiment of the present invention, with FIG. 1 being a sectional view and FIG. 2 being a perspective view. 1...Cleaning tank, 2...Vibration plate, 3...Vibrator, butt...Outer reflecting plate, 7...Inner reflecting plate,
8...Cleaning liquid, 9...Panel, 9a...
・Skirt part, 9b... Seal surface, 9c... Mask fixing pin, 12... Ultrasonic wave. = 5- Yariwa Fighting 1: Arai Shihira Kasu J4 Hard 2: Kakeru @ Sales 3: Sen & φ Power j- 5 Near! - Stool 1 scoop 1 board 7: Inside Show 1'J An 1 taste 1 treatment 8; 0n12: Raising the animal

Claims (1)

[Claims] 1. Immerse the skirt part of the panel in the cleaning solution in the cleaning tank,
A color cathode ray tube panel cleaning device that cleans a color cathode ray tube panel using ultrasonic waves radiated upward from below, comprising a reflector plate that irradiates the ultrasonic waves almost perpendicularly to the outer and inner surfaces of the skirt portion of the panel. A color cathode ray tube panel cleaning device featuring: