KR200228511Y1 - Cooling device for glass forming apparatus - Google Patents

Abstract

The present invention is a plunger disposed to be liftable toward a lower mold, a plunger head having a supply flow path and a return flow path of a cooling fluid circulated into the plunger and coupled to the upper end of the plunger, and installed outside the plunger, A cooling device for a cathode ray tube glass product forming equipment having a water tank for supplying water at room temperature to a supply passage, comprising: a water supply pipe connecting the water tank and the supply passage to communicate with each other; A connecting pipe connected to the water supply pipe; A coolant tank communicating with the connection tube and receiving coolant at a lower temperature than water contained in the water tank; And a water supply selection unit installed in at least one flow path of the water supply pipe and the connection pipe to selectively open and close the water supply pipe and the connection pipe. Thereby, the cooling apparatus for cathode ray tube glassware shaping | molding apparatus which made it possible to prevent a plunger thermal expansion in a short time after replacing a plunger is provided.

Description

COOLING DEVICE FOR GLASS FORMING APPARATUS

The present invention relates to a cooling apparatus for a cathode ray tube glass forming equipment, and more particularly, a plunger disposed to be liftable toward a lower mold, and a supply passage of a cooling fluid coupled to an upper end of the plunger and circulated into the plunger. And a plunger head having a return flow path, and a water tank installed outside the plunger and supplying water at room temperature to the supply flow path.

Generally, a cathode ray tube has a panel provided in front and projecting an image, a funnel-shaped funnel (hereinafter collectively referred to as a glass product) coupled to the rear of the panel, and a neck bonded to the government of the funnel.

Such glass products are compression molded in a glass product molding facility as will be described later. The glass product forming equipment includes a lower mold provided with a predetermined gob, a square loop shaped shell mold disposed at an upper end of the lower mold to form a bonded end surface of the glass product, and a lower mold provided above the lower mold. It has a plunger which ascends and moves toward the mold and compresses the glass product by pressing the gob at a predetermined distance from the lower mold when descending.

As a result, the gob provided from the glass melting furnace is introduced into the lower mold, and when the shell mold is disposed at the upper end of the lower mold, the plunger is lowered toward the lower mold to pressurize the gob. After pressurizing the plunger, water is maintained into the plunger to maintain a temperature of approximately room temperature to cool the plunger heated by the gob, and the lower mold is cooled to an appropriate state by injection of cooling air. As such, when the cooling process of the plunger and the lower mold is completed, the glass product is taken out and transferred to the post process.

On the other hand, when the repetitive molding process as described above, the surface of the lower mold and the plunger is worn. Accordingly, the lower mold and the plunger are exchanged for a new one through a certain period. In particular, in the case of the plunger, since the wear is more easily generated than the lower mold in the process of pressing the gob having a temperature of about 1000 ° C., the type change of the plunger is more frequent than the lower mold.

However, if a series of molding processes are performed immediately after the plunger is exchanged, the shell mold is cooled and shrunk by the time taken for exchanging the plunger. When the shrinkage of the shell mold is generated, when a gob of about 1000 ° C. is put into the lower mold and pressurized with a plunger, a sudden scratch occurs between the suddenly thermally expanded plunger and the shrunk shell mold.

Therefore, in order to prevent such a scratch, after replacing the plunger, supplying water at room temperature having a temperature range of 25 ° C to 40 ° C into the plunger to prevent thermal expansion of the plunger, but to suppress thermal expansion of the plunger with water at room temperature There is a problem in that it takes time and increases the overall production loss.

Accordingly, it is an object of the present invention to provide a cooling device for a cathode ray tube glass product forming equipment which is capable of preventing thermal expansion of the plunger within a short time after replacing the plunger.

1 is a partial cross-sectional view of a cooling device for a cathode ray tube glass product forming equipment according to the present invention,

FIG. 2 is a control block diagram of FIG. 1.

* Explanation of symbols for the main parts of the drawings

17: Plunger 18: Plunger Head

19: supply passage 21: return passage

30: cooling water tank 31: water tank

33: connection pipe 35: water supply pipe

37: water supply valve 40: control unit

The object is, according to the present invention, a plunger, which is movably disposed toward the lower mold, a plunger head having a supply flow path and a return flow path of a cooling fluid circulated into the plunger and coupled to an upper end of the plunger, Claims [1] A cooling apparatus for a cathode ray tube glass forming equipment having a water tank installed outside and supplying water at room temperature to the supply passage, comprising: a water supply pipe connecting the water tank and the supply passage to communicate with each other; A connecting pipe connected to the water supply pipe; A coolant tank communicating with the connection tube and receiving coolant at a lower temperature than water contained in the water tank; It is achieved by a cooling device for a cathode ray tube glass product forming equipment, characterized in that it is provided in at least one of the water supply pipe and the connection pipe and comprises a water supply selection unit for selectively opening and closing the water supply pipe and the connection pipe.

Here, the water supply selection unit may include a water supply valve installed in the mutual contact area of the water supply pipe and the connection pipe. The controller may further include a controller configured to open and close the water supply valve based on a predetermined working condition.

At this time, the control unit, during the mold replacement of the plunger to operate the water supply valve so that the cooling water from the cooling water tank to the water supply pipe; After a predetermined time elapses, it is preferable to operate the water supply valve so that water in the water tank is supplied to the water supply pipe.

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

As shown in FIGS. 1 and 2, the cathode ray tube glass forming apparatus according to the present invention is fixed by the pedestal 13 and has a lower mold 14 and a lower mold provided with a gob. Square loop-shaped shell mold 16 disposed at the upper end of 14 to form a joint end surface of the panel 10, and lowered to the lower mold 14 provided above the lower mold 14, and lowered. And a plunger 17 for forming the panel 10 by pressing the gob at a predetermined distance from the lower mold 14.

The upper part of the plunger 17 is provided with the plunger head 18 which is combined with the plunger 17 and which raises and lowers the plunger 17 integrally. The plunger head 18 is a supply passage for supplying water at room temperature (having a temperature range of about 25 ° C. to 40 ° C.) into the plunger 17 to cool the plunger 17 heated in the process of pressurizing the hot gob. 19 and a return flow passage 21 through which water cooled by the plunger 17 is discharged again are formed.

The plunger 17 is provided with a cooling water distribution member 23 which temporarily stores water at room temperature supplied through the supply passage 19 of the plunger head 18 and sprays it toward the inner wall surface of the plunger 17. The cooling water distribution member 23 is fixed to the lower end of the plunger head 18 at a predetermined distance from the inner wall surface of the plunger 17, and the corner area of the plunger 17 corresponding to the corner area of the panel 10. A predetermined hole 24 is formed in the water so that water can be concentrated to the edge region of the panel 10.

On the other hand, the cooling device according to the present invention is provided on the outside of the molding facility. The cooling device is provided on the outside of the plunger and supplies a water tank 31 for supplying water at room temperature to the supply passage 19, and a water supply pipe 35 for connecting the water tank 31 and the supply passage 19 to each other. ), A connecting pipe 33 connected to the water supply pipe 35, and a cooling water tank 30 communicating with the connecting pipe 33 and receiving coolant at a lower temperature than the water contained in the water tank 31. .

Here, the water at room temperature accommodated in the water tank 31 has a temperature range of approximately 25 ℃ to 40 ℃, the cooling water contained in the cooling water tank 30 maintains a temperature of at least 20 ℃ or less.

At a point where the water supply pipe 35 and the connection pipe 33 intersect with each other, a water supply selection unit is provided so as to close one of the flow paths of the water supply pipe 35 and the connection pipe 33. In this embodiment, a water supply valve 37 that can be controlled by the control unit 40 is used as the water supply selection unit.

At this time, the control part 40 controls the valve drive part 41 at the time of the mold replacement of a plunger, and supplies the cooling water from the cooling water tank 30 to the water supply pipe 35 by the water supply valve 37, After the time elapses, the valve driving part 41 is controlled again so that the water in the water tank 31 is supplied to the water supply pipe 35 by the water supply valve 37. At this time, the time for which cooling water is supplied from the cooling water tank 30 by the operation of the water supply valve 37 is set to about 1 minute to 5 minutes.

With this configuration, when a predetermined gob is introduced into the lower mold 14 from the glass melting furnace (not shown), the plunger 17 disposed coaxially with the lower mold 14 is lowered to pressurize the gob, thereby The gob is shaped into the panel 10 while flowing along the gap between the lower mold 14 and the plunger 17.

At this time, the controller 40 operates the water supply valve 37 to cool the plunger 17 heated in the process of pressurizing the gob having a temperature of about 1000 ° C. Thereby, the water of normal temperature accommodated in the water tank 31 is directed to the supply flow path 19 via the water supply pipe 35.

Water at room temperature from the water tank 31 is a cooling water flow passage 25 formed between the inner wall surface of the plunger 17 and the cooling water distribution member 23 through the cooling water distribution member 23 provided inside the plunger 17. And evenly flows along the hole 24 in the lower surface of the plunger 17 and the corner region of the plunger 17, and then is discharged again through the return passage 21. As a result, the lower surface and the corner region of the plunger 17 can be cooled to a predetermined temperature.

On the other hand, when the mold exchange is performed with a new plunger, as shown in FIG. 2, immediately after the mold exchange, the control unit 40 is operated in the process of pressing the gob to control the valve driving unit 41. For this reason, the flow path of the normal temperature water which flows from the water tank 31 to the water supply pipe 35 is closed, and the flow path of the cooling water which goes to the water supply pipe 35 through the connection pipe 33 from the cooling water tank 30 is opened. Thus, the cooling water passing through the supply passage 19 is a cooling water flow passage 25 formed between the inner wall surface of the plunger 17 and the cooling water distribution member 23 through the cooling water distribution member 23 provided inside the plunger 17. And evenly flows along the hole 24 in the lower surface of the plunger 17 and the corner region of the plunger 17, and then is discharged again through the return passage 21.

Again, when about 5 minutes have passed and cooling of the plunger by the coolant is completed, the controller 40 operates the water supply valve 37 to block the flow path of the connection pipe 33 through which the coolant flows, and the water tank 31 From the water supply pipe 35 through the water passage of the room temperature to the supply passage 19 is opened.

As described above, in the present invention, the water supply pipe 35 and the connection pipe 33 are provided in at least one flow path to provide a water supply selection unit for selectively opening and closing the water supply pipe 35 and the connection pipe 33. After replacing the plunger, it is possible to prevent the plunger from thermally expanding in a short time.

In the above-described embodiment, it is described that the water supply valve is installed at the intersection of the water supply pipe and the connection pipe, but the water supply valve may be separately installed in the water supply pipe and the connection pipe, respectively.

In addition, although the water supply valve can be opened and closed by the control unit in the above, this also, of course, may be to be manually operated using a two-way valve (Two-Way Valve).

As described above, according to the present invention, there is provided a cooling device for a cathode ray tube glass product forming facility which can prevent the plunger from thermal expansion within a short time after replacing the plunger.

Claims (4)

A plunger disposed to move up and down toward a lower mold, a plunger head coupled to an upper end of the plunger and having a supply flow path and a return flow path of a cooling fluid circulated into the plunger, and installed outside the plunger and at a room temperature to the supply flow path. In the cooling device for cathode ray tube glass product forming equipment having a water tank for supplying water of A water supply pipe connecting the water tank and the supply flow path to communicate with each other; A connecting pipe connected to the water supply pipe; A coolant tank communicating with the connection tube and receiving coolant at a lower temperature than water contained in the water tank; And a water supply selection unit installed in at least one of the water supply pipe and the connection pipe to selectively open and close the water supply pipe and the connection pipe. The method of claim 1, The water supply selection unit cooling device for a cathode ray tube glass product forming equipment, characterized in that it comprises a water supply valve which is installed at the intersection where the water supply pipe and the connection pipe cross each other. The method according to claim 1 or 2, And a control unit for opening and closing the water supply valve based on a predetermined working condition. The method of claim 3, The control unit is configured to operate the water supply valve so that the coolant from the cooling water tank is supplied to the water supply pipe when the plunger is replaced. Cooling device for a cathode ray tube glass product forming equipment, characterized in that after the predetermined time elapses, the water supply valve is operated to supply the water in the water tank to the water supply pipe.