KR200204102Y1 - Mold device for forming apparatus of crt glass - Google Patents

Abstract

The present invention relates to a mold apparatus for forming a glass article having a lower mold for interacting with a liftable plunger to form a glass article for a cathode ray tube, wherein the bottom face of the lower mold is a groove recessed from a plate surface over at least some length section. It is characterized in that is formed. As a result, a mold apparatus for a glass product molding facility is provided, which allows the lower mold to be uniformly cooled as a whole to improve the cooling efficiency of the lower mold.

Description

MOLD DEVICE FOR FORMING APPARATUS OF CRT GLASS}

The present invention relates to a mold apparatus for a glass product molding facility, and more particularly, to a mold apparatus for a glass product molding facility to improve the cooling efficiency of the lower mold.

Generally, a cathode ray tube has a panel provided in front and projecting an image, a funnel coupled to the rear of the panel in a funnel shape in which a nose portion is formed, and a neck having an electron gun coupled to the nose portion of the funnel. The panel and the funnel (hereinafter referred to as glassware) which are joined to each other by pleat sealing are formed by heating a raw material of glass in a melting furnace to form a molten state and providing it to a forming apparatus and pressurizing it.

Figure 6 is an enlarged cross-sectional view of the lower mold peripheral region for forming the outer surface of such a glass product, the details of which will be described later in detail with reference to Figures 2 and 3, and here, only the brief structure and the problem accordingly Explain. As shown in this figure, the molding equipment for the glass tube for cathode ray tube is a rotatable disk-shaped turntable 112, and a plurality of lower molds 118 formed in the circumferential direction of the turntable 112 to form the outer surface of the glass article. ), A shell mold 122 selectively stacked on the lower mold 118 to form a bonded end surface of the glass product, and a plunger (not shown) for pressing the molten glass provided on the lower mold 118. .

The lower mold 118 is supported on the turntable 112 by a plurality of pedestals 125, and a predetermined air outlet 123 is provided at an upper end of the turntable 112 on which the lower mold 118 is disposed. have. Accordingly, when the molten glass material is introduced into the lower mold 118, the shell mold 122 is laminated to the upper end of the lower mold 118, and then the molten glass material is pressed by pressing the molten glass material while the plunger is lowered. The silver can be molded into glass in the lower mold 118 and the shell mold 122. As such, when the molding of the glass product is completed, predetermined cooling air is introduced into the air duct 114 in the turntable 112 and sprayed to the bottom surface of the lower mold 118 through the air discharge port 123 to lower the mold 118. In addition to appropriately cooling the molded glass product in the) it will prevent overheating of the lower mold 118 itself.

By the way, in the conventional mold apparatus for glassware forming equipment, since the cooling air injected from the air duct toward the lower mold spreads on the bottom surface of the lower mold as a whole, the vortex is caused to relatively cool the central region of the lower mold. The disadvantage is that it can't be. That is, the glass product molded in the lower mold is usually formed thicker than the thickness of the outer region, so in order to cool it as a whole, the central region of the lower surface of the lower mold is more concentrated. Should be cooled. However, the conventional lower mold has only a flat bottom surface, and does not take a special structure in which the central region is intensively cooled. Therefore, there is a problem in that uniform cooling of the entire glass product cannot be realized.

Accordingly, an object of the present invention is to provide a mold apparatus for molding a glass product, which allows the lower mold to be uniformly cooled as a whole to improve the cooling efficiency of the lower mold.

1 is a view schematically showing a glassware forming facility according to the present invention,

2 is a side view of FIG. 1;

3 is an enlarged cross-sectional view of the lower mold region of FIG.

Figure 4 is a rear perspective view of the lower mold according to an embodiment of the present invention,

5 is a rear perspective view of the lower mold according to another embodiment of FIG. 4;

6 is a partial cross-sectional view of a conventional lower mold peripheral region corresponding to FIG. 3.

* Explanation of symbols for the main parts of the drawings

10: column 12: turntable

18: lower mold 21: groove

22: shell mold 23: air outlet

27: outer basket 35: inner basket

The above object is, according to the present invention, in the mold apparatus for glassware forming equipment having a lower mold for interacting with a liftable plunger to form a glass product for cathode ray tube, the bottom surface of the lower mold over the plate surface over at least some length section It is achieved by a mold apparatus for forming a glassware, characterized in that a groove recessed from is formed.

Here, the groove is advantageously arranged in a ring with respect to the central axis of the glass article to be molded. At this time, it is preferable that a plurality of the grooves are provided concentrically with respect to the central axis.

Hereinafter, with reference to the accompanying drawings will be described in detail for the subject innovation.

As shown in FIG. 1, a molding facility for a glass product for a cathode ray tube has a column 10 and a disk-shaped turntable 12 rotatably disposed about the column 10, the periphery of the turntable 12. In the direction, lower molds 18, which constitute a plurality of stations (# 1 to # 11) for forming, cooling, and taking out a glass product, are placed on the edge thereof. In addition, a plurality of shell molds 22 are disposed on the upper part of the turntable 12 to selectively form the upper part of the lower molds 18 to form a glass product together with a plunger (not shown).

In the first station, the molten gob is provided in the lower mold 18 arranged to correspond to each station, and in the third station, the shell mold 22 is stacked on the lower mold 18 and then referred to as a plunger. The press apparatus presses the gobs provided in the lower mold 18 to form a glass product. At this time, the shell mold 22, which is placed on the lower mold 18 to form the upper region of the glass product, is again moved by a separate transfer device to be disposed on the lower mold 18 in the next position.

In the fifth, seventh and ninth stations, cooling air is injected into the lower mold 18 to cool the lower mold 18 to cool the lower mold 18 to cool the molded glass product. In the station, the lower mold 18 is naturally cooled. In the sixth station, the molded and cooled glass products are taken out from the lower mold 18 and transferred to the post process. In the eighth and tenth stations, the lower mold 18 passes through the empty state. This process forms a continuous mechanism for each step by rotation of the turntable 12.

As shown in FIGS. 2 and 3, the turntable 12 is formed with an air discharge port 23 upwardly opened so that cooling air flowing in the lower mold air duct 14 to be described later is discharged. In the upper region of the air discharge port 23, lower molds 18 constituting a plurality of stations are stacked by the pedestal 25.

The bottom surface 20 of the lower mold 18 is formed with a groove 21 recessed from the plate surface. The grooves 21 are arranged in a plurality of rings on the basis of the central axis of the glass product to be molded. In this case, as shown in FIG. 4, the shape of the groove 21 may be formed concentrically while forming a circular shape with respect to the center axis, and as shown in FIG. 5, the groove 21 ′ is elliptical. It may consist of a phase. As such, the groove 21 formed on the bottom surface 20 of the lower mold 18 increases the contact area of the cooling air toward the bottom surface 20 of the lower mold 18 through the air duct 14 for the lower mold. Since it can play a role, the central region of the bottom surface 20 of the lower mold 18 can be further improved the cooling efficiency per unit time than the outer region.

The inside of the turntable 12 is discharged to the turntable air duct 16 through which the cooling air is circulated for cooling the turntable 12 itself, and the air discharge port 23 formed on the turntable 12 to discharge the air discharge port 23. A plurality of air ducts 14 and 16 are respectively formed which are divided into air mold ducts 14 for lower molds for cooling the lower molds 18 arranged in the upper region of the mold.

In the lower duct air duct 14 below the air discharge port 23, the fixing part 29 and the other end of which are screwed onto the turntable 12 are opened upwardly so as to communicate with the air discharge port 23. A basket-shaped outer basket 27 is fixed to the lower basket accommodating portion 31 of 12) and has a cylindrical side wall portion in which a plurality of side wall openings 33 are formed. A rotating shaft 37 is formed inside the outer basket 27 so that the outer basket 27 can be rotated forward and backward within a predetermined angle range, and the sidewall opening 33 of the outer basket 27 is selectively opened and closed. A cylindrical inner basket 35 having a side wall portion with a plurality of side wall openings 39 formed thereon is also provided.

In the inner basket 35, a cone-shaped air guide member 40 is installed for smooth upward guidance of the cooling air. The lower end of the inner basket 35, both arms arm 41 is coupled to the lower end of the rotary shaft 37, the end surface 'ㅗ' shape is inserted into the rotary shaft 37 is fixed to the plate surface of both arms arm 41 Bush 42 and one end contact the flange portion 43 of the bush 42 and the other end contact the lower end of the turntable 12 to elastically support the inner basket 35 against the outer basket 27. A plurality of coil springs 45 are provided.

By this configuration, when the molten glass is provided to the lower mold 18 from the melting furnace (not shown), the plunger disposed coaxially with the lower mold 18 is lowered to pressurize the glass contained in the lower mold 18. do. When the glass product is molded by pressurization of the plunger, the lower mold 18 reaches the fifth, seventh and ninth stations, and by cooling the lower mold 18 whose temperature is raised according to the press molding of the glass product. Cooling of the glass products located inside will be parallel.

First, when both arms 41 are rotated by a predetermined angle in one direction by a driving device (not shown), the rotating shaft 37 coupled thereto is also rotated, and the inner basket 35 is also rotated by a predetermined angle in association with the inner basket. The side wall opening 39 of the 35 and the side wall opening 33 of the outer basket 27 are in communication with each other. As such, when the side wall openings 39 and 33 between the inner and outer baskets 35 and 27 coincide with each other, the cooling air supplied into the lower mold air duct 14 passes through the side wall openings 39 and 33 communicating with each other. After being introduced into the inner basket 35, it is guided upward by the air guide member 40 to the bottom surface 20 of the lower mold 18 through the air discharge port 23.

As such, the cooling air is directed to the bottom surface 20 of the lower mold 18, thereby cooling the lower mold 18 including the molded glass product. At this time, since a predetermined groove 21 is formed on the bottom surface 20 of the lower mold 18, the area in which the groove 21 is formed increases the contact area with the cooling air to be injected, compared to other areas. The cooling efficiency per unit time can be further increased, and as a result, the lower mold 18 is not only able to maintain a uniform cooling state as a whole, but also has an effect of intensively cooling a predetermined local position.

Thus, in the present invention, by forming the grooves 21 recessed from the plate surface over at least a portion of the length of the bottom surface 20 of the lower mold 18, it is possible to improve the cooling efficiency of the lower mold 18. .

In the above-described embodiments, the groove 21 is formed in the center region of the bottom surface 20 of the lower mold 18. However, the bottom surface (not the center region) may be formed depending on the size and type of the glass product to be molded. It is a matter of course that the groove 21 may be formed in another region of the 20).

As described above, according to the present invention, there is provided a mold apparatus for forming a glass product for improving the cooling efficiency of the lower mold by uniformly cooling the lower mold as a whole.

Claims (3)

A mold apparatus for a glass forming apparatus having a lower mold for interacting with a liftable plunger to form a glass article for a cathode ray tube, Molding device for a glass molding equipment, characterized in that the bottom surface of the lower mold is formed with grooves recessed from the plate surface over at least some length section. The method of claim 1, And said groove is arranged in a ring shape with respect to the central axis of the glass article to be molded. The method according to claim 1 or 2, Molding apparatus for a glass product forming equipment, characterized in that the groove is provided with a plurality of concentric with respect to the central axis.