KR20030018771A - Cooling apparatus for cathode ray tube panel - Google Patents

Abstract

PURPOSE: An apparatus for cooling a CRT panel is provided to effectively prevent a local overcooling of the panel and overcooling of the lower mold, by forming a cooling air discharge path at the air former. CONSTITUTION: An apparatus for cooling a CRT panel, comprises a blower unit for compulsorily blowing a cooling air, and an air former(20) for discharging the cooling air to a panel(P). The air former includes an inner pipe(22) connected to the blower unit; an outer pipe(24) spaced apart from the outer surface of the inner pipe in such a manner that a discharge path(20a) is formed along the outer surface of the inner pipe; and a connection member(26) for interconnecting the inner pipe and the outer pipe. The cooling air applied to an edge of a face of the panel, a skirt and an inner wall of a lower mold is partially discharged through the discharge path, to thereby prevent a local overcooling of the panel.

Description

COOLING APPARATUS FOR CATHODE RAY TUBE PANEL}

The present invention relates to a panel cooling apparatus for a cathode ray tube, and more particularly to a panel cooling apparatus for a cathode ray tube that can effectively prevent local subcooling of the panel.

The cathode ray tube consists of a panel through which an image is projected, a conical funnel bonded to the back of the panel, and a tubular neck fused to a vertex of the channel. These panels, channels and necks are all made of glass. In particular, panels are produced by press molding a molten glass mass called a gob to a desired size and shape. That is, a panel is manufactured by injecting a molten glass lump called a product into a lower mold of a press molding apparatus and pressing and pressing a product fed into the lower mold as an upper mold.

On the other hand, the temperature of the panel formed by the press molding apparatus is a high temperature of approximately 600 ℃ bar, after which it is required to cool to an appropriate temperature for processing and processing. A general panel cooling method is a forced draft cooling device using an air former. This cooling apparatus arranges the air former 3 on the upper part of the lower mold 1 moved to the cooling position as shown in FIG. 1, and is supplied from the ducts 5 using the air former 3. It has a structure which cools high temperature panel P by blowing cooling air into panel P. FIG. In particular, this method can be cooled while maintaining the shape and dimensions of the panel (P) as the blown air is blown strongly into the panel (P).

However, such forced draft panel cooling device has caused a problem of locally supercooling the panel (P). That is, the cooling air discharged from the air former 3 exits from the center of the face P1 of the panel P to the outside through the edge of the face P1 and the skirt P2, and thus the edge of the face P1. Relative flow and pressure in and skirts (P2) are relatively high. As a result, the face P1 edge and the skirt P2 of the panel P, which has been subjected to a high flow rate and high pressure, are supercooled compared to other parts. In particular, in recent years, the thickness and height of the skirt P2 become thinner, shorter, or very thinner according to the flattening trend of the panel P. Due to the high flow velocity and the large pressure, the skirt P2 and the face P1 are This results in an even more subcooled edge. In addition, when the skirt P2 disappears very much, even when the high-speed high-pressure cooling air discharged from the airformer 3 hits the sidewall of the lower mold 1 intensively, the lower mold 1 may be generated. .

Accordingly, the present invention has been made to solve the problems described above, the object is to provide a panel cooling apparatus for cathode ray tubes that can effectively prevent local subcooling of the panel as well as local subcooling of the lower mold. have.

1 is a side cross-sectional view showing the configuration of a panel cooling device for a general cathode ray tube,

Figure 2 is a side cross-sectional view schematically showing the configuration of a panel cooling apparatus for cathode ray tube according to the present invention,

3 is a plan sectional view of an air former which is a main part of the present invention.

♣ Explanation of symbols for the main parts of the drawing ♣

P: Panel P1: Face

P2: Skirt 10: Air Supply Unit

12: blower tube 20; Air former

20a: discharge passage 22: inner tube

24: appearance 26: connecting rod

In order to achieve the above object, the present invention provides a panel cooling apparatus for a cathode ray tube comprising an air blowing means for forcibly blowing cooling air, and an air former for discharging the blown cooling air to the panel, the air former is the An inner tube connected to the blowing means; An exterior disposed at intervals on an outer surface of the inner tube such that a discharge passage is formed around an outer surface of the inner tube; It characterized in that it comprises a connecting rod for integrally connecting the inner tube and the exterior.

Preferably, the exterior of the air former is characterized in that it protrudes further downward than the bottom of the inner tube.

Hereinafter, a preferred embodiment of the cathode ray tube panel cooling apparatus according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 2 is a side cross-sectional view schematically showing the configuration of a cathode ray tube panel cooling apparatus according to the present invention, Figure 3 is a plan cross-sectional view of an air former, which is the main part of the present invention. First, as shown in Figure 2, the cooling apparatus of the present invention is provided with a blowing means. The blowing means includes an air supply device 10 and a blower tube 12 for pumping high pressure air generated from the air supply device 10. Here, the air supply device 10 may be configured as a compressor or a sirocco fan as is well known.

And the cooling device of the present invention has an air former 20. The air former 20 discharges the high-pressure cooling air pumped from the blower tube 12 to the panel P while lifting up and down by a lifting device (not shown), and the inner tube 22 connected to the blower tube 12. And an exterior 24 disposed at intervals on the outer surface of the inner tube 22 so that the discharge passage 20a is formed around the outer surface of the inner tube 22. The inner tube 22 and the outer tube 24 are formed in a quadrangular shape so as to match the rectangular panel P shape, and are integrally formed with each other by a connecting table 26 connecting the outer surface of the inner tube 22 and the inner surface of the outer tube 24. It is composed. Here, the inner tube 22 serves to directly blow the cooling air pumped from the blower tube 12 to the panel P, and the outer tube 24 is disposed as close as possible while maintaining a gap with the inner wall of the lower mold 1. And the cooling air discharged from the inner tube 22 has a sufficient pressure to pressurize the panel P, and the discharge passage 20a is formed by the cooling air discharged from the inner tube 22 of the panel P. By discharging a portion to the outside serves to prevent the panel (P) is overcooled. In particular, the discharge passage 20a discharges a portion of the cooling air that moves to the edge of the panel P while cooling the center portion of the panel P, so that the edge of the face P1, the skirt P2 and the lower mold 1 are discharged. It prevents the inner wall of the cell from being overcooled in advance. On the other hand, the outer tube 24 of the air former 20 should protrude further to the lower side than the bottom of the inner tube 22, which is the cooling air discharged from the inner tube 22 is guided to the inner wall of the outer tube 24 to the discharge passage ( This is to allow natural entry into 20a).

As a result, the air former 20 having such a configuration not only cools the panel P rapidly while discharging the high-pressure cooling air, but also bypasses a part of the discharged cooling air to the outside so that the edge and the skirt of the face P1 are closed. Minimizes the cooling air reaching (P2) to a minimum to prevent local supercooling of the edges of the face (P1) of the panel (P), the skirt (P2) and the inner wall of the lower mold (1). It is.

The cooling apparatus of the present invention having the configuration as described above has an air former 20 having an inner tube 22 and an outer tube 24 spaced apart from the inner tube 22 so that the discharge passage 20a is formed. By having it provided, there is an advantage of preventing local subcooling of the panel P as well as effectively preventing local subcooling of the lower mold 1.

Although the preferred embodiments of the present invention have been described above by way of example, the scope of the present invention is not limited to these specific embodiments, and may be appropriately changed within the scope of the claims.

As described above, the cathode ray panel panel cooling apparatus according to the present invention forms a discharge passage for discharging cooling air to an air former, and concentrates on the face edge and skirt of the panel and the inner wall of the lower mold by using the discharge passage. By discharging part of the cooling air to be applied, it is possible to prevent local subcooling of the panel as well as to effectively prevent subcooling of the lower mold.

Claims (2)

In the panel cooling apparatus for cathode ray tube comprising a blowing means for forcibly blowing cooling air, and an air former for discharging the blown cooling air to the panel, The air former has an inner tube connected to the blowing means; An exterior disposed at intervals on an outer surface of the inner tube such that a discharge passage is formed around an outer surface of the inner tube; A panel cooling device for a cathode ray tube, characterized in that comprising a connecting rod for integrally connecting the inner tube and the exterior. The panel cooling apparatus for cathode ray tube according to claim 1, wherein an exterior of the air former is further protruded downward from a bottom of the inner tube.