JPH0454623B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method and apparatus for transporting molten glass for continuous mechanical molding and handmade molding.

[Prior Art] The work of molding molten glass into a predetermined shape can be broadly classified into two types depending on the method of dividing and supplying liquid high-temperature glass into required amounts. The first method is to continuously create and supply glass gobs of a predetermined weight and shape using mechanical equipment.
It is mainly used in combination with mechanical molding.
The second method involves manually winding up and supplying the required glass gobs using a rod, and is combined with so-called hand-made molding.

The latter method of manually winding up glass blocks is
It is widely used in the field of production where it is called crystal glass, and a further characteristic of this method is that the glass itself is melted in a crucible furnace. However, glass melted in a crucible furnace is usually inferior to continuous glass melting in both quality and thermal energy cost.

[Problems to be Solved by the Invention] In order to eliminate these drawbacks, a system has been put into practical use that winds up glass gobs directly from a feeder connected to a continuous glass melting furnace.
This method has several inherent problems in terms of operation of the entire glass melting and molding process.

For example, a conventional facility in which continuous mechanical molding and hand molding depend on the same glass supply device has a configuration as shown in FIG. That is, a mechanical molding machine 8 is installed on the work floor 1 below the tip of the feeder 2, and a hand-molded crucible or glass storage container 10 is placed at the same height as the feeder 2.
is provided. The plunger 4 provided at the tip of the channel 3 in the feeder is operated to flow out the gore 6 from the orifice 5, and the taken out gob 6 flows into the trough 7.
The blank mold 9 of the continuous mechanical molding machine 8 is supplied through the blank mold 9 of the continuous mechanical molding machine 8. On the other hand, the container 1 located in the middle of the flow path 3
Starting from scratch, the glass blocks are manually rolled up and molded into handmade pieces. The height H between the mechanical molding work floor 1 and the hand molding work floor 1a is required to be about 2 m, and the required glass must be flowed out from the overflow pipe 10a at night when hand molding is not in progress.

In this way, continuous machine molding and hand molding require a large difference in the required distance from the glass level to the work floor, so the molding work floor must be made up of two layers, which makes the process after the molding process more complicated in terms of logistics. Things are unavoidable. Furthermore, since hand molding is literally done mainly by people, the work hours are concentrated during the day. Therefore, there is a large difference in the amount of glass required between day and night (theoretically it can be zero at night), and this large fluctuation range poses great difficulties in maintaining the quality of glass from the perspective of melting glass. There is. Therefore,
In production factories where both types of glass are mixed, in order to minimize fluctuations between day and night, after hand molding is completed, the amount of glass necessary to maintain quality is taken out by overflowing from the winding point, or simple press molding is performed. You must go and fulfill your purpose. In any case, this is a cause of worsening operating costs.

The object of the present invention is to solve the above-mentioned problems in crystal glass production and to allow mechanical molding and hand molding to coexist efficiently.

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a continuous machine for transporting molten glass to a process of manually winding and forming the glass. The glass is supplied from the middle of the molding glass channel, thereby allowing hand molding work and continuous mechanical molding work to coexist on the same floor level. In addition, the present invention provides a valve mechanism in the middle of the glass flow path for continuous mechanical molding that enables on/off of glass supply and adjustment of the amount of glass to be transferred, and extends the flow tube for glass transfer downward. To provide a molten glass transfer device characterized in that a handmade glass storage container is installed at the bottom of a flow tube and at the same floor level as a mechanical molding machine. In this way, glass with an adjusted flow rate is supplied to the lower crucible (glass storage container) from the middle of the glass flow path for normal continuous mechanical molding.
It is possible to eliminate the drawbacks of conventional methods and efficiently manufacture products of higher quality.

[Example] Next, the present invention will be specifically described based on the drawings. FIG. 1 is a front view of an apparatus for carrying out the method of the present invention, and FIG. 2 is an enlarged sectional view taken along the - line in FIG. A plunger 4 and an orifice 5 are provided at the tip of the orifice 5.
The gob 6 from
is supplied to a blank mold 9. Glass channel 3
A valve mechanism is provided in the middle of the flow tube 11 for glass transfer. The lower part of the flow tube 11 is inserted into a handmade molding crucible or a storage container 10 having a similar function, which is installed on the same floor level as the mechanical molding machine 8.

The upper end of the flow tube 11 for glass transfer is always connected to the flow path 3.
The flow tube is located below the level of molten glass in the flow tube, and glass is allowed to flow in by turning on and off a valve mechanism attached to the upper end of the flow tube. As the valve mechanism, a slit valve 15 is used which can be moved toward and away from the upper end of the flow tube by means of a driving means 20, as shown in FIG.

The lower end of the slit valve 15 is connected to the upper end 1 of the flow pipe 11.
A hollow cylindrical portion 16 is formed with a size that allows the flow pipe to be fitted thereinto, and an inlet 17 with a diameter of 20 to 30 mm is bored in the middle of the cylindrical portion that overlaps the upper end 12 of the flow tube. When the driving means 20 is actuated to raise the slit valve 15 by a distance S, the slit opening degree is obtained in accordance with the amount of glass to be transferred to the crucible furnace or the like below. The valve driving means 20 in the upper part of the slit valve 15 includes a screw rod 21 and a pulley 2.
2, 23, a belt 24, and a motor 25.

Without operating the drive means 20 as shown in FIG.
Hollow cylindrical portion 1 of flow tube upper end 12 and slit valve 15
6 are in close contact with each other, the glass contacts the contact surface 13 between the inner surface and the upper end portion 12 of the flow tube by 0.5 to 1.0 mm.
The downward movement is prevented by the very small sliding surface clearance 14. Further, a through hole 18 of about 5 mm is bored in the slit valve body. The purpose of this through hole is to remove the glass in the flow tube 11, if necessary, when the glass transfer is stopped. In particular, when the flow tube 11 is made of a metal such as platinum, in order to prevent deformation and damage to the flow tube 11, when closing the slit valve, open the stop valve 19 at the upper end of the valve body and let the through hole 18 communicate with the atmosphere. This is to discharge the glass in the flow tube.

The flow tube 11 for glass transfer extending downward through the bottom of the flow channel 3 is protected by an electric heating zone 26, and furthermore, the lower end thereof is a crucible provided in a heat retention furnace 27 or has a similar function. The bottom of the storage container 10 has been reached and the outlet 28 is located in close proximity thereto. Therefore, glass can always be supplied so as to rise from the bottom of the crucible or storage container 10 having a similar function, and glass of constant quality can always be obtained regardless of the level of glass in the crucible furnace.

The biggest feature of this method is the continuous mechanical glass flow channel 3, which is normally located at a height of 2 m or more.
A flow tube 11 is directly connected to the glass to transport the glass downward, and the glass is transferred to a crucible or a storage container 1 having a similar function.
The point is that the glass block is stored in the container 0, and the glass block can be manually wound up using the rod 29 from within the container.
In this way, both machine molding and hand molding can be performed on the same floor, allowing interaction between the two operations even during molding, further promoting the diversification of molded items.

A further feature is that the flow tube 11 that transports glass from above to below is provided with a mechanism for adjusting the glass transport flow rate. This adjustment mechanism includes a slit valve 15 installed at the upper end of the flow pipe 11.
and an electric heating zone 26 provided around the outer periphery of the flow tube 11. By appropriately adjusting this adjustment mechanism, that is, by setting the flow rate to a level that can supply the total amount of glass gobs manually wound up in 24 hours, the large fluctuations in the amount of glass melted between day and night can be almost eliminated. This makes it possible to continuously melt glass of extremely stable quality even if hand molding coexists with machine molding.

[Effects of the Invention] As described above, according to the present invention, machine molding and hand molding can be performed on the same floor level, and the two operations can be exchanged, making it easy to diversify molded items. In addition, using a glass transfer flow tube inserted into a normal continuous glass flow channel for continuous mechanical molding, the flow rate of glass is adjusted appropriately using a valve mechanism, and the glass is transferred to a crucible or a container with a similar function located below. By transferring, it is possible to eliminate the various drawbacks of the conventional method and efficiently manufacture products of higher quality and variety.

[Brief explanation of the drawing]

FIG. 1 is a front view of an apparatus for carrying out the method of the present invention;
Figure 2 is an enlarged sectional view taken along the - line in Figure 1;
FIG. 3 is an enlarged sectional view showing a state in which the slit valve is open in FIG. 2, and FIG. 4 is a front view of equipment using a conventional molten glass transfer method. 1... Working floor, 3... Glass channel, 8... Mechanical molding machine, 10... Crucible (glass storage container), 11
...flow tube, 15 ... slit valve, 17 ... inlet, 20 ... drive means, 26 ... electric heating zone, 2
8...Exit.

Claims (1)

[Claims] 1. When transferring molten glass to a hand molding process in which glass is rolled up and molded using one person's hands, the glass is transferred to a continuous machine molding machine installed above the hand molding work position. A method for transporting molten glass, characterized in that it is supplied from the middle of a glass flow path, thereby enabling hand molding work and continuous mechanical molding work to be performed on the same floor level. 2. A valve mechanism is provided in the middle of the glass flow path for continuous mechanical molding to enable on/off of glass supply and adjustment of the amount of glass to be transferred, and a flow tube for glass transfer is provided to extend downward, and the lower part of the flow tube is A molten glass transfer device characterized in that a handmade glass storage container is installed at the same floor level as a mechanical forming machine. 3. Claim 2, wherein the valve mechanism is a slit valve disposed at the upper end of the flow tube so as to be able to move toward and away from the flow tube.
The molten glass transfer device described in Section 1. 4. The flow tube for glass transfer has a lower end extending to the bottom of the glass storage container, and has an outlet near the bottom for supplying glass into the container in a boiling manner. Molten glass transfer device.