JPH0367973B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an apparatus for supplying glass raw materials to a melting tank.

(Prior Art) Glass raw material melting tanks can be roughly divided into hot top and cold top.

As shown in Fig. 6, the hot-top type melting tank has a melting tank 1 that stores the melted glass substrate G.
A supply device 102 and a hopper 103 are arranged on the side of the side wall 101 of 00, and the supply device 102 is attached to the base 1.
A motor 105 is provided on 04, and this motor 105
is transmitted to the plate 108 via the cam 106 and the crank 107, and the plate 108 can move forward and backward along the guide roller 109 in the direction of the arrow in the figure. By repeating this forward and backward movement, the adjustment plate 110 is moved from the hopper 103 to the adjusting plate 110. via plate 108
A predetermined amount of the glass raw material 111 supplied above is charged onto the glass base G, and the glass raw material 11 that has been supplied is
1 to the center using a pusher 112 provided at the tip of the plate, and this glass raw material 111 is transferred to the melting tank 1.
It is heated with a burner etc. placed in the upper side wall (ceiling part) of 00 to form a glass base G.

In addition to the above-mentioned hot-top type melting tanks, there are also those using screw feeders, electromagnetic feeders, belt feeders, and the like.

On the other hand, in a cold-top type melting tank, an electrode rod is placed inside the melting tank, and an electric current is passed through the glass base to raise the temperature of the glass base due to the heat generated by the resistance, thereby melting the glass raw material supplied to the surface of the glass base. This cold dop is intended to uniformly melt the glass raw materials from the entire surface of the melting tank by uniformly supplying the glass raw materials to the surface of the glass base material, and the glass base surface is covered with glass raw materials. Because of this, the temperature is relatively low.

(Problems to be Solved by the Invention) The hot-top type melting tank described above cannot be used as a cold-top type melting tank because the glass raw material is allowed to fall only into the inlet of the melting tank.

Additionally, in the case of a cold-top type melting tank, a belt feeder or the like is generally used to evenly supply glass raw materials to the glass base surface, but the temperature above the glass base surface rises to around 400 to 500℃. In such cases, the belt feeder becomes unusable.

(Means for Solving the Problems) In order to solve the above problems, the present invention makes it possible to move a plate onto the upper surface of which glass raw materials are supplied from a hopper back and forth above the glass substrate of a melting tank,
Further, above the plate, a raw material feeding device equipped with a louver was arranged separately from the plate, and the louver and the plate cooperated to cause the glass raw material to fall evenly onto the glass base surface.

(Function) When the lower end of the louver is in the upper position, the plate is advanced to above the glass base surface, and then, with the lower end of the louver positioned inside the glass raw material, the plate is retreated, so that the glass raw material is scraped by the louver. drop

Furthermore, by removing the glass raw material charging device equipped with a louver, it can be used as a hot-top type melting tank.

(Example) Examples of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is an overall front view of a raw material supply device according to the present invention, FIG. 2 is a side view of the raw material supply device, and FIG. 3 is a plan view of the raw material supply device.

The raw material supply device 1 is arranged on the side of the dissolution tank 2. The melting tank 2 consists of a main body 2a that holds a molten glass base G, and a ceiling part 2b provided above the main body 2a. Inside the main body 2a, there is an electrode that heats the glass base G by applying electricity when used as a cold top. A rod 3 is arranged, a throat part 4 is formed at the bottom of the main body 2a for feeding the glass material G to the feeder part, and a burner 5 is provided in the ceiling part 2b to heat and melt the glass raw material when used as a hot top. ing.

On the other hand, the raw material supply device 1 is provided with a rail 7 on a frame 6, and a cart 8 is attached to the rail 7 via casters 9 and guide rollers 10.
A rack 11 (see FIG. 2) fixed to the lower surface is engaged with a gear 13 rotated by a motor 12 disposed below the cart 8. By rotating the motor 12 in the forward or reverse direction, the truck 8 moves forward or backward along the rail 7.

Further, a plate 14 is supported on the truck 8 so that its inclination angle can be adjusted. That is, the inside of the plate 14 is hollow, and the plate 14 is cooled by passing cooling water through the hollow part, and the rear end of the plate 14 is controlled by a height adjusting member 16 equipped with a handle 15. The intermediate portion of the plate 14 is supported by a height adjusting member 18 having a handle 17, and by rotating the handles 15 and 17, the inclination angle of the plate 14 is adjusted. still,
A pusher 19 is attached to the lower front end of the plate 14.

Further, a hopper 21 is attached to the frame 6 by a support 20 (see FIG. 2). A glass raw material 22 is held in this hopper 21,
The lower end opening of the hopper 21 faces the upper surface of the plate 14, an adjustment plate 23 is provided in front of the lower end opening, and a regulating plate 24 for preventing the frit 22 from returning is provided behind the lower end opening.

Further, above the plate 14, a raw material input device 2 is provided.
5 are installed. This raw material input device 25 has a pair of arms 26 extending in the length direction of the plate 14,
The proximal end of the arm 26 is pivotally attached to the lower front surface of the hopper 21, and the intermediate portions of the arms 26, 26 are supported at the upper front surface of the hopper 21 by a rod 28 provided with a turnbuckle 27. A louver 30 has a plurality of finger portions 29 vertically disposed vertically apart from each other in the front-rear direction, and extends in the width direction of the plate 14 by these finger portions 29.
Both sides of... are rotatably supported.

The lower edge of this louver 30 has a sawtooth shape, and a rod 31 extending in the front-rear direction is arranged above the louver 30, and this rod 31 is provided with a claw portion 32 extending downward. The center part of the upper edge of each louver 30 is rotatably connected to the claw part 32, and the rear end of the rod 31 is connected to the hopper 2.
It is pivotally connected to the front end of a piston rod 33a of a cylinder unit 33 supported at the center of the front surface of the piston.

When the piston rod 33a is in the retracted state, each louver 30 is closed as shown in FIG. 4A.
... rotates around the pivot point of the finger portion 29 and is substantially vertical, and when the piston rod 33a is in the protruding state, each louver 30 ... is rotated as shown in FIG. 4A, as shown in FIG. Rotate clockwise from the state shown in to a nearly horizontal position.

The operation of the raw material supply device having the above configuration will be explained below.

When performing a cold top using the electrode rod 3 and not using the burner 5, the trolley 8 and plate 1
4 is moved backward and the louver 30 of the raw material input device 25 is rotated nearly horizontally as shown in FIG. 4B.

First, from the above-described state, the motor 12 is driven to move the cart 8 forward, and the plate 14 is moved forward to a position that covers substantially the entire upper surface of the glass base G. In this case, since the lower end of the louver 30 is located on the upper surface of the plate 14 at a higher position than the frit 22 supplied from the hopper 21, the frit 22 is
It will not interfere with the bottom edge of the

Next, the cylinder unit 33 is operated to retract the piston rod 33a, and the louver 30 is moved to the fourth position.
Rotate to the approximately vertical position shown in Figure A. Then, the lower ends of the louvers 30 are in the lower position, and as shown in FIG. compartmentalize.

Thereafter, the motor 12 is reversely rotated to move the truck 8 and plate 14 backward. Then, since the louver 30 remains in the same position, as the plate 4 retreats, the glass raw materials 22 on the plate 14 fall uniformly onto the surface of the glass base G sequentially from the tip.
Thereafter, this operation is repeated depending on the height of the glass base surface.

On the other hand, in the case of a hot top using the burner 5, the raw material feeding device 25 is removed from the raw material supply device 1, and only the plate 14 and hopper 21 are used.

That is, in the case of a hot top, the tip of the plate 14 is not advanced to the depths of the dissolving tank 2;
Stop near the entrance, then operate the handles 15 and 17 to tilt the plate 14 forward, and in this state move the cart 8 forward and backward to move the glass raw material 22 onto the side wall 2.
Let it fall onto the upper surface of the glass substrate G near point a.

FIG. 5 is a schematic plan view showing another embodiment of the arrangement of the louvers 30. In the embodiment described above, each louver 30 had the same length, but in this embodiment, the central louver 30 is made longer, and the lengths of the front and rear louvers 30 are made shorter. By doing so, even if the surface of the melting tank is hexagonal, the glass raw material can be evenly dropped onto the surface of the glass substrate.

Further, in the illustrated example, the lower end position of the louver 30 is changed by rotating the louver 30, but a cam or a link mechanism may be used to linearly move the louver 30 up and down.

(Effects of the Invention) As explained above, the glass raw material supply device according to the present invention can be used for both hot tops and cold tops, and especially when used for cold tops, the glass raw materials are distributed evenly over the surface of the glass substrate. It can be dropped, and it is also much superior in terms of heat resistance compared to conventional belt feeders.

[Brief explanation of drawings]

FIG. 1 is a front view of the glass raw material supply device according to the present invention, FIG. 2 is a side view of the same raw material supply device, FIG. 3 is a plan view of the same raw material supply device, and FIGS. 4 A and B are movement of the louver. FIG. 5 is a plan view showing another embodiment of the louver arrangement, and FIG. 6 is a front view of a conventional raw material supply device. In the drawing, 1 is a raw material supply device, 2 is a dissolution tank, and 3 is a raw material supply device.
1 is an electrode rod, 5 is a burner, 8 is a trolley, 14 is a plate, 21 is a hopper, 22 is a glass raw material, 25 is a raw material charging device, 30 is a louver, and G is a glass base.

Claims (1)

[Claims] 1. Consists of a plate that can move forward and backward above the base surface in the glass melting tank, a hopper that supplies glass raw materials to the top surface of this plate, and a raw material input device that is arranged above the plate separately from the plate. , this raw material input device is equipped with a plurality of louvers extending in the width direction of the plate, and the lower end of the louver is located above the glass raw material on the upper surface of the plate when the plate advances above the base surface, and when the plate retreats. A device for supplying raw materials to a glass melting tank, characterized in that it is located in the glass raw materials on the upper surface of a plate.