JPS61131336A - Washing device of panel for color cathode-ray tube - Google Patents

Abstract

PURPOSE:To make inside temperature of a washed panel to be constant by providing a thermometer measuring temperature inside the panel and a sequence controlling board which controls washing time according to measured value of said thermometer. CONSTITUTION:When a panel 1 is forwarded to a position A, the inside temperature of the panel 1 is measured by an infrared-ray thermometer 2 for being compared with the temperature set by an indicating set device 8 for being decided whether or not being standardized in order to be memorized by the shift register part 9a. When the panel 1 is forwarded to the position B, a timer of the processor control part 9b works only for the washing time accorded with the good or poor quality signals basing on the decision signals for putting a solenoid valve in an on-state. Then washing water is supplied to a nozzle 3 from a washing water supply source 5 for a prescribed time for being sprayed inside the panel 1. When the panel 1 is forwarded to the position C, the solenoid valve 7 is put in the on-state only for the washing time accorded with the good or poor quality signals and washing water is sprayed inside the panel 1 from the nozzle 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a cleaning device for cleaning the inner surface of a color cathode ray tube panel with warm water or hot pure water.

[Background of the invention]

The manufacturing process for color cathode ray tube panels includes a cleaning process in which the inner surface of the panel is cleaned before a phosphor is applied to the inner surface of the panel.

In the conventional panel cleaning method, all the panels that are loaded are cleaned under the same conditions, so if panels with different temperatures are loaded, the temperature of the cleaned panels will be out of the standard.
There was a problem in that the phosphor was applied as it was, causing poor color mixing.

[Purpose of the invention]

An object of the present invention is to provide a color cathode ray tube panel cleaning device that can keep the inner surface temperature of the cleaned panel constant.

[Summary of the invention]

In order to achieve the above object, the present invention provides a cleaning device that cleans the inner surface of a color cathode ray tube panel with hot water or hot pure water, and includes a thermometer that measures the temperature of the inner surface of the T4 channel, and a cleaning time that is controlled based on the measured value of this thermometer. )=1- control panel.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

The panel 1 is set in the apparatus with the inner surface facing downward, and is intermittently transferred to positions A1B and C by a transfer means (not shown). An infrared thermometer 2 for measuring the inner surface temperature of the panel l is disposed below position A. Nozzles 3.4 are disposed below the positions 81C, and hot water or warm pure wash water is supplied to the nozzles 3.4 from the wash water supply source 5 via electromagnetic valves 6.7, respectively.

The infrared thermometer 2 is connected to a shift register section 9a of a sequencer control panel 9 via an instruction setting device 8,
The temperature measured by the infrared thermometer 2 is compared with the temperature set by the indicator setting device 8 and stored in the shift register section 9a as to whether it is within the standard or outside the standard.
When this is sent, the processing machine control section 9 of the sequencer control panel 9
It is designed to be output to b. The processing machine control section 9b has a cleaning time setting including a good product signal and a bad signal, and the electromagnetic valve 6.7 is turned on only during this predetermined time. A timer for turning off the solenoid valve 6.7 by the processing machine control section 9b is provided corresponding to each solenoid valve 6.7.

Next, the operation will be explained. When the panel 1 is sent to the person in charge, the inner surface temperature of the panel 1 is measured with an infrared thermometer 2. This measured value is compared with the temperature set in the instruction setting device 8, and it is determined whether it is within the standard or outside the standard, and the result is stored in the shift register section 9a. When the panel 1 is sent to the position B, the timer of the processing machine control section 9b operates for the cleaning time corresponding to the non-defective signal or the defective signal based on the judgment signal t, and the solenoid valve 6 is turned on. As a result, cleaning water is supplied from the cleaning water supply source 5 to the nozzle 3 for a predetermined time and is sprayed onto the inner surface of the panel 1. When the panel 1 is sent to the f-jinyo/C, the solenoid valve 7 is turned ON only during the cleaning time of the non-defective signal or the defective signal l, and the cleaning water is supplied from the nozzle 4 to the panel 1. sprayed onto the inside surface of the

In this way, the internal temperature of the panel 1 is measured and the cleaning time is controlled according to the internal temperature, so the temperature of the cleaned panel 1 can be kept constant and color mixing defects are prevented. Ru.

〔Effect of the invention〕

As is clear from the above explanation, the present invention includes:
A thermometer that measures the temperature inside the panel and a sequencer that controls the cleaning time based on the measured value of this thermometer.
Since it is equipped with a control panel, by keeping the panel temperature constant before applying the phosphor, it is possible to prevent color mixing failures.

[Brief explanation of the drawing]

The figure is a schematic structural explanatory diagram showing one embodiment of the present invention. l... Panel, 2... Infrared thermometer, 3.4... Nozzle, 5... Cleaning water supply source, 6.7... Solenoid valve, 8...
Instruction setting device, 9...Sequencer control panel. CB A

Claims (1)

[Claims] A cleaning device that cleans the inside surface of a color cathode ray tube panel with hot water or warm pure water, characterized by being equipped with a thermometer that measures the temperature of the inside surface of the panel, and a sequencer control panel that controls the cleaning time based on the measured value of this thermometer. A cleaning device for color cathode ray tube panels.