JPH10316433A - Apparatus for feeding glass raw material - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable as feeding apparatus to feed a glass raw material in a large width in a floating island-like state on a molten glass by an extremely simple structure by protrusively installing the face part inclined frontword and laterally toward the interior of a furnace at a glass material charge inlet for glass melting furnaces so that the glass raw material extruded from a screw type extruder is successively deposited onto the surface and the glass raw material is divided and allowing the divided glass raw materials to slide down into the furnace. SOLUTION: A glass raw material 12 charged from a hopper 11 is advanced through the interior of a feeder 3 toward a glass raw material inlet 6 by a screw 4 rotated by a motor 5 and extruded by the face part 2 and deposited and slightly moved on inclined surface of the face part 2 as the bulkiness increases and crack is produced between glass raw material 12 extruded from the rear and divided and dropped onto a molten glass 13 as a mass and advanced through the interior of glass melting furnace 7 toward a taken out port of glass while floating on a molten glass 13. Then, sliding down of the glass raw material 12 is carried out at an interval of time again and the dropped mass is advanced and widely distributed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a glass material supply apparatus for a glass melting furnace. Specifically, the present invention relates to a glass raw material supply device using a screw type extruder.

[0002]

2. Description of the Related Art As an apparatus for supplying a glass raw material to a glass melting furnace, an apparatus using a belt conveyor, an apparatus using a pusher, an apparatus using a screw type extruder, and the like are generally known.

[0003] Among these, in a glass raw material supply apparatus using a screw type extruder, the glass raw material composed of powder is moved in a substantially sealed state and charged into a furnace, so that scattering of the glass raw material to the outside is suppressed. Therefore, adverse effects on the working environment can be minimized.

Conventionally, a glass raw material supply apparatus using a screw type extruder has a screw type extruder provided with a feeder 22 internally provided with a screw 21 connected to a motor 20 which is a rotation driving means as shown in FIG. A hopper 24 is attached to one end of the feeder 22, and the other end is connected to a glass raw material inlet 27 through a furnace wall 26 of a glass melting furnace 25. According to this glass raw material supply device, the glass raw material 28 dropped from the hopper 24 to the feeder 22 advances in the feeder 22 toward the glass melting furnace 25 by the rotation of the screw 21 by the motor 20, and the glass raw material inlet 27. Is extruded into a glass melting furnace 25 and supplied onto a molten glass 29.

[0005] The glass raw material 28 supplied into the glass melting furnace 25 by the glass raw material supply device using the screw type extruder 23 as shown in FIG.
Is floated in a continuous narrow band on the glass, and is heated and melted while moving forward in the glass melting furnace 25.

Incidentally, in order to improve the melting property of the glass raw material, it is necessary to create conditions for the glass raw material to efficiently receive heat from the surroundings. For example, in order for the glass raw material to receive the flame combustion heat in the furnace, the radiant heat, and the conduction heat from the molten glass to a maximum, it is desirable that the glass material be supplied in a shape having a surface area as large as possible and widely in the furnace. Therefore, it is said that the glass raw material is preferably distributed in multiple directions in the form of independent floating islands, rather than being supplied in one direction in a continuous strip shape.

[0007] As means for making the glass raw material floating on the molten glass into a floating island shape, there are examples of making a cut in the glass raw material with a cutting knife, and providing peaks and valleys in the glass raw material with a push rod. Since all or a part of the apparatus is installed in the furnace and exposed to high temperatures, failures frequently occur and maintenance is not easy. There is also an example in which an extruder for a glass raw material is operated intermittently, but there is a problem that control is difficult. On the other hand, as means for diffusing the glass raw material on the molten glass, there is an example in which the extruder itself for the glass raw material is reciprocated in the width direction. However, there is a problem that the apparatus becomes extremely complicated and expensive.

[0008]

DISCLOSURE OF THE INVENTION The present invention has been proposed in view of the above circumstances, and has as its object a very simple structure, in which a glass raw material is floated on a molten glass in the form of a floating island and placed in a furnace. An object of the present invention is to provide a glass raw material supply device capable of supplying a wide range.

[0009]

According to the present invention, there is provided a glass material supply apparatus comprising: a glass material charging port having a front surface and a surface inclined in a forward and lateral direction projecting into the furnace; After the glass material extruded by the machine is sequentially deposited on the surface portion, the glass material is divided and slid down into the furnace.

[0010]

According to the glass raw material supply apparatus of the present invention, the glass raw material charging port is provided with a surface portion inclined forward and left and right and laterally toward the inside of the glass raw material charging port. The glass raw material extruded from the glass raw material inlet is deposited on the surface, moves slightly along the slope of the surface as the bulk increases, and a crack is formed between the glass raw material and the glass material extruded later. It occurs and is divided, and finally, as a lump, slides down in the front, left and right directions from the surface portion, and floats on the molten glass. Similarly, the glass raw material slides down from the surface one after another, but the lump of the glass raw material that has slipped earlier advances in the furnace while floating on the molten glass.
Since the slippage occurs with time, the blocks of glass raw material do not come into contact with each other and, as a result, form small floating islands and are dispersed in the furnace.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of a glass raw material supply apparatus according to the present invention will be described in detail with reference to the drawings.

In FIG. 1, 1 is a screw type extruder,
2 is a surface part. The screw-type extruder 1 is the same as the conventional one, 3 is a feeder, 4 is a screw, and 5 is a motor of a rotary drive means. The surface portion 2 is made of a refractory material and protrudes directly below the glass raw material inlet 6, and is inclined toward the front, left, and right directions 8 into the glass melting furnace 7 as shown in FIG. , 9, and 10 are formed.

In the glass raw material supply apparatus of this embodiment, the glass raw material 12 dropped from the hopper 11 is
The feeder 3 is advanced toward the glass material input port 6 by the screw 4 rotating at
It is extruded and deposited on the surface portion 2 immediately below, and slightly moves on the inclined surfaces 8, 9, and 10 of the surface portion 2 as the bulk increases, and a crack is generated between the glass material 12 and the glass material 12 extruded from behind. It is cut off and lumps, slides on the inclined surfaces 8, 9 and 10, and falls onto the molten glass 13. The dropped glass raw material 12 advances inside the glass melting furnace 7 toward a glass outlet (not shown) while floating on the molten glass 13. Thereafter, after a while, the lump of the glass raw material 12 slides down again. However, since the lump of the glass raw material 12 that has slid earlier has already moved forward, the lump of the glass raw material 12 before and after come into contact with each other. Instead, they form independent small floating islands as shown in FIG. 2 and are widely distributed in the glass melting furnace 7.

The screw type extruder 1 of the present embodiment may be movable, and the face portion 2 is formed integrally with the glass material inlet 6 as shown in FIG. It may be separated as shown in FIG. 3 (B).

[0015]

According to the glass raw material supply apparatus of the present invention,
With a very simple structure, the glass raw material floating on the molten glass can be supplied to the glass melting furnace in a floating island shape and widely.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part when a glass raw material supply device of the present invention is installed in a glass melting furnace.

FIG. 2 is a main part plan view showing a state of a glass raw material in a furnace formed by the glass raw material supply device of the present invention.

FIG. 3 is a perspective view of a surface part constituting the glass raw material supply device of the present invention.

FIG. 4 is a longitudinal sectional view of a main part when a conventional glass raw material supply device is installed in a glass melting furnace.

FIG. 5 is a plan view of a main part showing a state of a glass raw material in a glass melting furnace formed by a conventional glass raw material supply device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Screw-type extruder 2 face part 3 Feeder 4 Screw 5 Motor 6 Glass raw material inlet 7 Glass melting furnace 8, 9, 10 Inclined surface 11 Hopper 12 Glass raw material 13 Molten glass 14 Furnace wall

Claims (1)

[Claims] 1. A glass material input port of a glass melting furnace is provided with a surface portion inclined forward and laterally into the furnace, and glass material extruded by a screw type extruder is sequentially placed on the surface portion. A glass raw material supply device, wherein the glass material is separated after being deposited, and is then slid into a furnace.