JP5817729B2 - Raw material supply apparatus and raw material supply method, and glass plate manufacturing apparatus and manufacturing method - Google Patents

Description

  The present invention relates to a raw material supply apparatus and a raw material supply method for charging a glass raw material into a glass melting tank, and a glass plate manufacturing apparatus and manufacturing method.

  As a raw material supply device for feeding glass raw material into a glass melting tank, as shown in FIG. 1, powdery or granular glass raw material 1 is dropped from hopper 2 onto conveying pan 3, and glass raw material 1 on conveying pan 3 is made of glass. An apparatus for moving the transfer pan 3 forward and backward toward the glass melting tank 6 so as to be put into the melting tank 6 is known (see, for example, Non-Patent Document 1).

  In this apparatus, as the transport pan 3 moves forward, the glass material 1 in the hopper 2 is dropped (sent out) on the transport pan 3 from the gap between the transport pan 3 and the hopper 2. Moreover, in this apparatus, the glass raw material 1 on the conveyance pan 3 is thrown into the glass melting tank 6 as the conveyance pan 3 moves backward.

Masayuki Yamane et al. “Glass Engineering Handbook” published by Asakura Shoten, July 5, 1999, p. 301-302, FIG. 1.8 (b)

  However, in the conventional raw material supply apparatus, since the conveyance pan 3 is heated by the radiant heat from the glass melting tank 6 or the like, the glass raw material 1 on the conveyance pan 3 is denatured and the fluidity is lowered. It may be difficult to stably add a certain amount into the dissolution tank 6 at a time.

  Moreover, in the conventional raw material supply apparatus, since the glass raw material 1 on the conveyance pan 3 is input into the glass melting tank 6 as one raw material pile, it takes time until the input raw material is melted. When this time becomes long, the glass raw material 1 is often prepared by mixing a plurality of types of materials having different melting points, so that the composition of the molten glass tends to be non-uniform.

  The present invention has been made in view of the above-mentioned problems, and it is possible to stably add a certain amount of glass raw material on a transport pan to a glass melting tank, and to dissolve the glass raw material in the glass melting tank. An object of the present invention is to provide a raw material supply apparatus and raw material supply method capable of shortening the time and obtaining highly homogeneous glass, and a glass plate manufacturing apparatus and manufacturing method.

In order to solve the above object, the raw material supply apparatus of the present invention comprises:
A raw material supply apparatus having a hopper for storing glass raw material, a transport pan for transporting the glass raw material dropped from the hopper toward the glass melting tank, and an advancing / retreating mechanism for moving the transport pan toward and away from the glass melting tank In
A cutter movable between the insertion position into the glass raw material on the transport pan and the standby position above the glass raw material on the transport pan; and an insertion member inserted into the glass raw material on the transport pan; Have
The insertion member relatively scrapes the glass raw material on the transport pan as the transport pan advances, and creates a plurality of raw material piles arranged in the width direction of the transport pan,
The raw material supply device in which the cutter at the insertion position pushes at least a part of each raw material pile on the transport pan relative to the transport pan and puts it into the glass melting tank as the transport pan moves backward. It is.

Moreover, the raw material supply method of the present invention comprises:
In the raw material supply method of dropping the glass raw material from the hopper onto the conveyance pan and moving the conveyance pan toward the glass dissolution vessel so that the glass raw material on the conveyance pan is put into the glass dissolution vessel,
The insertion member inserted into the glass raw material on the transport pan relatively scrapes the glass raw material on the transport pan as the transport pan advances, and a plurality of raw material stacks arranged in the width direction of the transport pan. Make
The cutter inserted into the glass raw material on the transport pan pushes out at least a part of each raw material pile on the transport pan relative to the transport pan as the transport pan moves backward, and the glass melting tank It is a raw material supply method thrown in to.

The apparatus for producing a glass plate of the present invention comprises:
The raw material supply apparatus of the present invention, a glass melting apparatus for producing a molten glass by melting a glass raw material supplied by the raw material supply apparatus, and a molding apparatus for forming the molten glass produced by the glass melting apparatus into a plate shape The manufacturing apparatus of the glass plate which has these.

The method for producing the glass plate of the present invention comprises:
It is the manufacturing method of the glass plate which manufactures a glass plate using the manufacturing apparatus of the glass plate of this invention.

  According to the present invention, the glass raw material on the transport pan can be stably fed into the glass melting tank in a fixed amount, and the melting time of the glass raw material in the glass melting tank can be shortened. The raw material supply method and raw material supply apparatus which can obtain high glass, and the glass plate manufacturing apparatus and manufacturing method can be provided.

It is a schematic sectional drawing which shows the conventional raw material supply apparatus. It is a schematic sectional drawing of the manufacturing apparatus of the glass plate by one Embodiment of this invention. It is side surface sectional drawing (1) for demonstrating operation | movement of the principal part of the raw material supply apparatus 100. FIG. It is side surface sectional drawing (2) for demonstrating operation | movement of the principal part of the raw material supply apparatus 100. FIG. It is side surface sectional drawing (3) for demonstrating operation | movement of the principal part of the raw material supply apparatus 100. FIG. It is side surface sectional drawing (4) for demonstrating operation | movement of the principal part of the raw material supply apparatus 100. FIG. It is side surface sectional drawing (5) for demonstrating operation | movement of the principal part of the raw material supply apparatus 100. FIG. FIG. 4 is a top sectional view taken along line AA in FIG. 3. FIG. 6 is a top sectional view taken along line AA in FIG. 5. FIG. 8 is a top sectional view taken along line AA in FIG. 7. It is front sectional drawing along the BB line of FIG.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

  FIG. 2 is a schematic cross-sectional view of a glass plate manufacturing apparatus according to an embodiment of the present invention. As shown in FIG. 2, the glass plate manufacturing apparatus includes a raw material supply apparatus 100, a glass melting apparatus 200, and a forming apparatus 300.

The raw material supply apparatus 100 is an apparatus that supplies the powdery or granular glass raw material 10 to the glass melting apparatus 200. The glass raw material 10 is prepared by mixing a plurality of types of materials according to the use of the product. For example, when manufacturing a glass substrate for display, the glass raw material 10 is often prepared by mixing a boron compound. Examples of the boron compound include boric acid (H ₃ BO ₃ ). This boric acid is a hydrate and releases water of hydration when heated.

  One or a plurality of raw material supply apparatuses 100 are provided. In the case where a plurality of raw material supply apparatuses 100 are provided, the raw material supply apparatuses 100 are arranged side by side in the width direction of the glass melting apparatus 200.

  The glass melting apparatus 200 is an apparatus for producing the molten glass 14 by melting the glass raw material 10 supplied by the raw material supply apparatus 100. The glass melting apparatus 200 may be a general one and includes a raw material inlet 202 and a glass melting tank 204. The glass raw material 10 charged into the glass melting tank 204 from the raw material charging port 202 is heated by flame heat from a burner or the like and gradually melts into the molten glass 14 accommodated in the glass melting tank 204. A dustproof plate 206 for preventing the glass raw material 10 from scattering when the raw material is supplied is provided above the raw material inlet 202.

  The molding apparatus 300 is an apparatus that molds the molten glass 14 produced by the glass melting apparatus 200 into a plate shape. The molding apparatus 300 may be a general one, for example, a float molding apparatus or a fusion molding apparatus. The float forming apparatus is an apparatus that continuously supplies molten glass to a molten tin bath surface in a bathtub to form a strip shape. In the fusion molding apparatus, molten glass is continuously supplied into the inside of a bowl having a substantially V-shaped cross section, and the molten glass overflowing from the bowl to the left and right sides is merged at the lower edge of the bowl to form a strip. Device.

  The molded glass molded by the molding apparatus 300 is gradually cooled and then cut into a predetermined size to form a glass plate as a product.

  3 to 7 are side cross-sectional views for explaining the operation of the main part of the raw material supply apparatus 100. FIG. 8 is a top sectional view taken along line AA in FIG. 9 is a top cross-sectional view taken along the line AA in FIG. 5 and 9, the state when the transport pan 120 is at the retracted position is indicated by a dotted line, and the state when the transport pan 120 is at the forward position is indicated by a solid line. FIG. 10 is a top sectional view taken along line AA in FIG. FIG. 11 is a front sectional view taken along line BB in FIG.

  The raw material supply apparatus 100 includes a hopper 110 that stores the glass raw material 10, a transport pan 120 that transports the glass raw material 10 dropped from the hopper 110 toward the glass melting tank 204, and a transport pan 120 that faces the glass melting tank 204. And an advancing / retreating mechanism 130 for advancing / retreating. The advance / retreat mechanism 130 advances and retracts the transport pan 120 toward the glass melting tank 204 as shown in FIGS. 3 to 7 under the control of a control device including a CPU and the like.

  In this raw material supply apparatus 100, as will be described in detail later, the glass raw material 10 in the hopper 110 is dropped onto the transport pan 120 from the gap between the transport pan 120 and the hopper 110 as the transport pan 120 advances. (Sent out). Further, as the transport pan 120 moves backward, the glass material 10 on the transport pan 120 is put into the glass melting tank 204.

  The hopper 110 is a tank that stores the glass raw material 10. The hopper 110 is fixed apart from the glass melting tank 204. The hopper 110 is formed of, for example, a steel material (for example, SS material) or the like, and has a cylindrical shape that tapers downward.

  Above the hopper 110, a mixer (not shown) for preparing a glass raw material 10 by weighing and mixing a plurality of types of raw materials is installed. The glass raw material 10 prepared by the mixer is dropped into the hopper 110 and stored. Before the raw material is prepared by the mixer, if a small amount of raw material used for a clarifying agent or the like is mixed with a relatively large amount of dolomite, silica sand, or the like, a small amount of the raw material can be prevented from being biased in the mixer. Therefore, it is preferable. As the trace amount of raw material, fluorite, ammonium chloride, strontium chloride, calcium dihydrate sulfate and the like are preferable. In addition, when the mixer is installed in a place away from the hopper 110, the glass raw material prepared by the mixer is conveyed to the upper part of the hopper 110 continuously by belt conveyance or at regular intervals by bucket conveyance. The glass raw material may be dropped into the hopper 110. The belt conveyance is preferably configured so as to be able to reversely rotate. This is because, for example, when there is a facility trouble at the belt conveyance destination, a spare facility provided on the opposite side of the belt conveyance destination can be used.

  A transport pan 120 is installed below the hopper 110. As the transport pan 120 advances, the glass material 10 in the hopper 110 is dropped (sent out) on the transport pan 120 from the gap between the transport pan 120 and the hopper 110.

  The dropped amount is adjusted by the size of the gap between the transport pan 120 and the hopper 110, the inclination angle θ of the transport surface 122 of the transport pan 120 with respect to the horizontal plane (see FIG. 3), the angle of repose of the glass raw material 10, and the like. Is possible.

  Although inclination angle (theta) is suitably set according to the kind etc. of the glass raw material 10, it is preferable that it is 8 degrees-15 degrees, for example, and it is more preferable that it is 10 degrees-12 degrees.

  The angle of repose of the glass raw material 10 is appropriately set according to the type of the glass raw material 10 and the like, but is preferably, for example, 30 ° to 45 °, and more preferably 35 ° to 40 °.

  Here, the angle of repose is measured by a method as described in JIS R 9301-2-2 “Alumina powder—Part 2: Physical property measurement method-2: Angle of repose”. More specifically, the angle of repose is determined by passing the specimen (glass raw material 10 before being stored in the hopper 110) through a sieve having a diameter of 80 mm and an aperture of 710 μm while vibrating, and then having a height of 160 mm on the horizontal plane. When it is gently dropped from a funnel onto a table with a diameter of 80 mm, it is defined by measuring the angle formed by the generatrix of the cone formed by the test body and the horizontal plane. Here, the amount of powder falling is assumed to drop until the angle of repose is substantially stabilized.

  The conveyance pan 120 conveys the glass raw material 10 dropped from the hopper 110 toward the glass melting tank 204. Since the glass raw material 10 spreads thinly on the conveyance pan 120, the glass raw material 10 can be thrown into the glass melting tank 204 widely and thinly.

  The transport pan 120 is formed of a steel material (for example, SS material). The transport pan 120 has a flat transport pan main body 121 (see FIG. 2), and the upper surface of the transport pan main body 121 serves as a transport surface 122 on which the glass raw material 10 is placed. The conveyance surface 122 is inclined so as to go downward as it goes from the hopper 110 side to the glass melting tank 204 side. A pair of side plates 124 project from both ends of the conveyance surface 122 in the width direction in order to prevent the glass material 10 from sliding off.

  The transfer pan 120 can reciprocate between a forward position approaching the glass melting tank 204 and a retracted position moving away from the glass melting tank 204. For example, the conveyance pan 120 has a plurality of wheels 128 (see FIG. 2) and can reciprocate on the guide rail 140 held with respect to the glass melting tank 204.

  The one-way movement distance L (see FIG. 5) of the transport pan 120 is appropriately set according to the amount of the glass raw material 10 input, but is preferably 80 mm to 150 mm, and more preferably 100 mm to 120 mm. .

  The width W1 (see FIG. 8) of the conveyance surface 122 of the conveyance pan 120 is appropriately set according to the input amount of the glass raw material 10 and the width of the raw material input port 202, but may be 1000 mm to 3000 mm.

  The front end 125 of the transport pan 120 is always inserted into the raw material inlet 202 so that the glass raw material 10 on the transport surface 122 is charged into the glass melting tank 204 even if it slides down due to the inclination of the transport surface 122.

  The advance / retreat mechanism 130 is a mechanism for advancing and retracting the transport pan 120 toward the glass melting tank 204. For example, as shown in FIG. 2, the advance / retreat mechanism 130 includes a motor 132, a rotating disk 134, a rod 136, and the like.

  The motor 132 is fixed to the guide rail 140. The motor 132 is a drive source for rotating the rotary disk 134. A rotating disk 134 is attached to the rotating shaft of the motor 132.

  The rod 136 is provided between the rotating disk 134 and the transport pan 120, and converts the rotational motion of the rotating disk 134 into the linear motion of the transport pan 120. One end of the rod 136 is rotatably connected to the eccentric position of the rotating disk 134, and the other end of the rod 136 is rotatably connected to the transport pan 120.

  In the advance / retreat mechanism 130, when the motor 132 rotates the rotating disk 134 in one direction under the control of the control device, the rod 136 pushes and pulls the transport pan 120, and the transport pan 120 moves on the guide rail 140. Move back and forth. In this way, the advance / retreat mechanism 130 advances and retracts the transport pan 120 toward the glass melting tank 204.

  In addition to the advance / retreat mechanism 130, the raw material supply apparatus 100 may include an adjustment mechanism 150 that adjusts the relative position between the guide rail 140 and the glass melting tank 204. For example, as shown in FIG. 2, the adjustment mechanism 150 includes a movable carriage 151 and a lifting device 152. The movable carriage 151 is a device that can move in a direction in which the guide rail 140 approaches and separates from the glass melting tank 204. The lifting device 152 is mounted on the movable carriage 151 and is a device that supports the guide rail 140 so that it can be lifted and lowered with respect to the glass melting tank 204. The elevating device 152 is composed of, for example, a hydraulic jack.

  As shown in FIG. 2, the raw material supply apparatus 100 according to the present embodiment moves between the insertion position of the glass raw material 10 on the transport pan 120 and the standby position above the glass raw material 10 on the transport pan 120. It further includes a possible cutter 160 and a moving mechanism 170 that moves the cutter 160 between the insertion position and the standby position. The moving mechanism 170 moves the cutter 160 between the insertion position and the standby position according to the position of the transport pan 120 and the like as shown in FIGS. 3 to 7 under the control of a control device including a CPU and the like. Let

  The cutter 160 is formed of a steel material (for example, SS material) or the like. The cutter 160 is formed in a plate shape and is disposed substantially vertically. A sharp blade portion may be provided at the lower end portion of the cutter 160.

  The cutter 160 is movable between a standby position above the glass material 10 on the transport pan 120 and a insertion position into the glass material 10 on the transport pan 120.

  The cutter 160 in the standby position is not in contact with the glass raw material 10 on the transport pan 120 as shown in FIG. The standby position is appropriately set according to the thickness of the glass raw material 10 on the transport pan 120 and the like.

  The cutter 160 at the insertion position may come into contact with the conveyance surface 122 of the conveyance pan 120, but in order to prevent abrasion with the conveyance surface 122, as shown in FIG. It is desirable to form a slight gap. The cutter 160 at the insertion position forms a slight gap between the pair of side plates 124 of the transport pan 120 as shown in FIG.

As shown in FIGS. 7 and 10, the cutter 160 in the insertion position relatively pushes at least a part of the glass material 10 on the transport pan 120 from the transport pan 120 as the transport pan 120 moves backward. , Put into the glass melting tank 204. As a result, the glass raw material 10 can be stably fed into the glass melting tank 204 by a certain amount. This effect is remarkable when the glass raw material 10 contains a hydrate (for example, boric acid (H ₃ BO ₃ )). This is because when the hydrate is heated by radiant heat from the glass melting apparatus 200 and hydrated water is released, the fluidity of the glass raw material 10 is lowered.

  The moving mechanism 170 is a mechanism that moves the cutter 160 between the insertion position and the standby position. For example, as shown in FIG. 2, the moving mechanism 170 includes an actuator 172, a first link 174, a second link 176, and the like.

  The actuator 172 has a configuration that can be expanded and contracted, and includes, for example, an air cylinder or a hydraulic cylinder. An upper end portion of the actuator 172 is rotatably connected to the hopper 110. On the other hand, the lower end portion of the actuator 172 is rotatably connected to one end portion of the first link 174.

  The first link 174 is configured to rotate forward and backward according to the expansion / contraction operation of the actuator 172. The first link 174 is pinned to the hopper 110 at the center, and can rotate around the pin. The other end of the first link 174 is rotatably connected to the upper end of the second link 176.

  The second link 176 is configured to move up and down in conjunction with the forward and reverse rotation of the first link 174. The lower end of the second link 176 is connected to the upper surface of the cutter 160.

  Incidentally, the second link 176 can enter and exit the opening of the dustproof plate 206. In order to suppress the scattering of the glass raw material 10 from the opening, a bellows-like elastic cover 208 is provided between the dustproof plate 206 and the first link 174 so as to surround the upper end of the second link 176. .

  In the moving mechanism 170, when the actuator 172 expands and contracts under the control of the control device, the first link 174 rotates forward and backward. Accordingly, the second link 176 moves up and down, and the cutter 160 moves up and down. In this way, the moving mechanism 170 moves the cutter 160 between the insertion position and the standby position.

  As illustrated in FIG. 2, the raw material supply apparatus 100 according to the present embodiment further includes an insertion member 180 that is inserted into the glass raw material 10 on the transport pan 120. The insertion member 180 is formed of a steel material (for example, SS material) or the like. The insertion member 180 is formed in a rod shape and is arranged substantially vertically. The lower surface of the insertion member 180 may be in contact with the conveyance surface 122 of the conveyance pan 120, but a slight gap may be formed between the insertion member 180 and the conveyance surface 122 in order to prevent abrasion with the conveyance surface 122. desirable.

  The insertion member 180 may be provided between the cutter 160 and the raw material inlet 202, but in order to suppress deterioration of the insertion member 180 due to radiant heat from the raw material inlet 202 or the like, as shown in FIG. It is desirable to provide between 160 and the hopper 110.

  As shown in FIG. 9, the insertion member 180 relatively scrapes the glass raw material 10 on the transport pan 120 as the transport pan 120 moves forward, and a plurality of raw material peaks 11 to 11 arranged in the width direction of the transport pan 120. 13 is produced. As described later in detail, the surface area (heat receiving area) of the glass material 10 can be increased, and the melting time of the glass material 10 can be shortened.

  The plurality of raw material mountains 11 to 13 on the transport pan 120 may be connected in the width direction of the transport pan 120 or may be separated in the valley. Moreover, the width | variety of the some raw material mountains 11-13 on the conveyance pan 120 may be the same, and may differ.

  The plurality of raw material piles 11 to 13 on the transport pan 120 are formed so as to be separated from each other when they are put into the glass melting tank 204 as shown in FIG. 10 in order to further shorten the melting time of the glass raw material 10. It is desirable.

  The rear portion of the insertion member 180 (that is, the portion on the hopper 110 side) preferably has a taper-shaped (eg, triangular) cross-sectional shape. Accordingly, the insertion member 180 can be easily separated into the glass raw material 10 as the conveyance pan 120 advances.

  In addition, the cross-sectional shape of the front side portion (the portion on the dissolution tank 204 side) of the insertion member 180 is not particularly limited.

  The width of the insertion member 180 (the length in the direction parallel to the width direction of the transport pan 120) W2 (see FIG. 8) is appropriately set according to, for example, the width W1 of the transport surface 122 of the transport pan 120. It is preferable that it is -150mm, and it is more preferable that it is 90-110mm. By setting the width W2 to 75 mm or more, the surface area (heat receiving area) of the glass raw material 10 can be set sufficiently large. On the other hand, when the width W2 exceeds 150 mm, the supply amount of the glass raw material 10 to the glass melting tank 204 becomes too small, which is not preferable.

  The number of the insertion members 180 is set as appropriate according to, for example, the width W1 of the conveyance surface 122 of the conveyance pan 120, but may be 1 to 4, for example, and preferably 2 to 3.

  As shown in FIG. 2, the raw material supply apparatus 100 of the present embodiment preferably further includes an adjustment member 190 for adjusting the thickness by dividing the glass raw material 10 on the transport pan 120 into a plurality of regions in the width direction. . For example, as shown in FIG. 2, the adjustment member 190 is engaged with a bolt or the like so as to be slidable in the vertical direction on the front side (glass melting tank 204 side) of the hopper 110.

  The preparation member 190 includes a plurality of movable members 191 to 193, for example, as shown in FIG. The plurality of movable members 191 to 193 are arranged side by side in the width direction of the transport pan 120, and the gaps between the transport members 120 and the transport pan 120 can be independently adjusted. Therefore, by adjusting the gap between each movable member 191 to 193 and the transport pan 120 manually or automatically, the glass raw material 10 on the transport pan 120 is divided into a plurality of regions in the width direction, and the thickness is adjusted. can do.

  The thickness of the glass raw material 10 in each area | region is suitably set according to the number of installation of the raw material supply apparatus 100, the temperature distribution of the width direction in the glass melting tank 204, etc., for example. Thereby, the melting time of the glass raw material 10 in the glass melting tank 204 can be further shortened.

  In addition, it is preferable that the adjustment member 190 has a configuration in which the heights of the plurality of raw material peaks 11 to 13 on the transport pan 120 can be adjusted independently.

  Next, a raw material supply method using the raw material supply apparatus 100 configured as described above will be described with reference to FIGS. In addition, the below-mentioned 1st-4th process is repeatedly performed for every predetermined period (for example, period for 1 minute-10 minutes) under control of a control apparatus.

  In the first step, the cutter 160 rises from the insertion position (see FIG. 3) to the standby position (see FIG. 4) with the transport pan 120 stopped at the retracted position. In a state where the cutter 160 is stopped at the standby position, the cutter 160 is not in contact with the glass raw material 10 on the transport pan 120.

  In the second step, the transport pan 120 advances from the retracted position (see FIG. 4) to the advanced position (see FIG. 5) with the cutter 160 stopped at the standby position. Along with this, the glass raw material 10 in the hopper 110 is dropped onto the transport pan 120 and sent out from the gap between the adjustment member 190 and the transport pan 120. While the transport pan 120 moves forward, the glass material 10 on the transport pan 120 is stably placed on the transport pan 120 by friction.

  Further, in the second step, as shown in FIG. 5, as the conveyance pan 120 advances, the front end portion 125 of the conveyance pan 120 pushes the glass raw material 10 floating on the molten glass 14 near the raw material charging port 202 to the downstream side. Move. Thereby, the space for throwing in the new glass raw material 10 is securable. In addition, since the glass raw material 10 floating on the molten glass 14 is moved from the low temperature raw material inlet 202 to the high temperature downstream side, melting of the glass raw material 10 can be promoted.

  Furthermore, in the second step, as shown in FIG. 9, as the conveyance pan 120 moves forward, the insertion member 180 relatively scrapes the glass raw material 10 on the conveyance pan 120, and a plurality of them are arranged in the width direction of the conveyance pan 120. The raw material piles 11 to 13 are prepared.

  In the third step, the cutter 160 is lowered from the standby position (see FIG. 5) to the insertion position (see FIG. 6) with the transport pan 120 stopped at the forward position. When the cutter 160 is stopped at the insertion position, the lower surface of the cutter 160 is in contact with the transport surface 122 or slightly above the transport surface 122.

  In the fourth step, the transport pan 120 moves backward from the forward position (see FIG. 6) to the backward position (see FIG. 7) with the cutter 160 stopped at the insertion position. As the transport pan 120 moves backward, the cutter 160 at the insertion position relatively pushes out at least a part of each of the raw material piles 11 to 13 on the transport pan from the transport pan 120 and drops it onto the glass melting tank 204.

  As described above, in this embodiment, the cutter 160 relatively pushes at least a part of the glass material 10 on the transport pan 120 from the transport pan 120 and puts it into the glass melting tank 204 as the transport pan 120 moves backward. 10 can be stably fed into the glass melting tank 204 in a fixed amount. This effect is remarkable when the glass raw material 10 contains a hydrate. This is because when the hydrate is heated by radiant heat from the glass melting apparatus 200 and hydrated water is released, the fluidity of the glass raw material 10 is lowered.

  In the present embodiment, the insertion member 180 relatively scrapes the glass raw material 10 on the transport pan 120 as the transport pan 120 advances, and a plurality of raw material peaks 11 to 13 aligned in the width direction of the transport pan 120 are produced. Therefore, the surface area of the glass raw material 10 can be increased. Therefore, the heat receiving area of the glass raw material 10 can be increased, and the melting time of the glass raw material 10 in the glass melting tank 204 can be shortened. As a result, highly homogenous glass is obtained.

In addition, although the glass raw material 10 is not specifically limited, According to this embodiment, since melting | dissolving of the glass raw material 10 in the glass melting tank 204 becomes easy, melting | fusing temperature is 100 degreeC or more higher than the raw material of soda-lime glass. The alkali-free glass material is preferable. That is, the present invention is particularly effective for a non-alkali glass raw material. Alkali-free glass, for example, by mass percentage based on _{oxides, SiO 2: 50~66%, Al} 2 O 3: 10.5~24%, B 2 O 3: 0~12%, MgO: 0~ 8%, CaO: 0 to 14.5%, SrO: 0 to 24%, BaO: 0 to 13.5%, MgO + CaO + SrO + BaO: 9 to 29.5%. More preferably, the alkali-free glass, by mass percentage based on _{oxides, SiO 2: 58~66%, Al} 2 O 3: 15~22%, B 2 O 3: 5~12%, MgO: 0~ 8%, CaO: 0 to 9%, SrO: 3 to 12.5%, BaO: 0 to 2%, MgO + CaO + SrO + BaO: 9 to 18%. Moreover, according to this embodiment, since glass with high homogeneity is obtained, it is preferable that the obtained non-alkali glass is applied particularly to a plate glass for a display (preferably for a liquid crystal display).

  Although one embodiment of the present invention has been described above, the present invention is not limited to the above-described embodiment, and various modifications and substitutions can be made to the above-described embodiment without departing from the scope of the present invention. Can be added.

  For example, in the second step of the present embodiment, the transport pan 120 is advanced from the retracted position to the advanced position while the cutter 160 is stopped at the standby position, but the present invention is not limited to this. For example, the transport pan 120 may advance from the retracted position to the advanced position while the cutter 160 rises from the insertion position to the standby position.

  In the fourth step of the present embodiment, the transport pan 120 is retracted from the advance position to the retract position with the cutter 160 stopped at the insertion position, but the present invention is not limited to this. For example, the transport pan 120 may be retracted from the advance position to the retract position while the cutter 160 is lowered from the standby position to the insertion position.

Moreover, although the insertion member 180 of this embodiment is always inserted in the glass raw material 10 on the conveyance pan 120, as long as the several raw material piles 11-13 can be produced, according to the position of the conveyance pan 120, it is. It may be moved to a standby position above the glass raw material 10.

  Although the present invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various modifications and variations can be made without departing from the scope and spirit of the invention. This application is based on Japanese Patent Application 2010-191417 filed on Aug. 27, 2010, the contents of which are incorporated herein by reference.

DESCRIPTION OF SYMBOLS 10 Glass raw material 11-13 Raw material pile 14 Molten glass 100 Raw material supply apparatus 110 Hopper 120 Carrying pan 130 Advance / retreat mechanism 160 Cutter 180 Inserting member 190 Adjustment member 200 Glass melting apparatus 202 Raw material inlet 204 Glass melting tank 300 Molding apparatus

Claims (14)

A raw material supply apparatus having a hopper for storing glass raw material, a transport pan for transporting the glass raw material dropped from the hopper toward the glass melting tank, and an advancing / retreating mechanism for moving the transport pan toward and away from the glass melting tank In
A cutter movable between the insertion position into the glass raw material on the transport pan and the standby position above the glass raw material on the transport pan; and an insertion member inserted into the glass raw material on the transport pan; Have
The insertion member relatively scrapes the glass raw material on the transport pan as the transport pan advances, and creates a plurality of raw material piles arranged in the width direction of the transport pan,
The raw material supply device in which the cutter at the insertion position pushes at least a part of each raw material pile on the transport pan relative to the transport pan and puts it into the glass melting tank as the transport pan moves backward. .   The raw material supply apparatus according to claim 1, wherein a rear portion of the insertion member has a tapered cross-sectional shape.   The raw material supply apparatus according to claim 1, wherein the insertion member has a width of 75 to 150 mm.   The raw material supply apparatus of any one of Claims 1-3 which further has the adjustment member for dividing | segmenting the glass raw material on the said conveyance bread | pan into a some area | region in the width direction, and adjusting thickness. The glass material is a non-alkali glass material,
The inorganic alkali glass, by mass percentage based on _{oxides, SiO 2: 50~66%, Al} 2 O 3: 10.5~24%, B 2 O 3: 0~12%, MgO: 0~8 %, CaO: 0 to 14.5%, SrO: 0 to 24%, BaO: 0 to 13.5%, MgO + CaO + SrO + BaO: 9 to 29.5 %. The raw material supply apparatus described. The alkali-free glass, by mass percentage based on _{oxides, SiO 2: 58~66%, Al} 2 O 3: 15~22%, B 2 O 3: 5~12%, MgO: 0~8%, The raw material supply apparatus according to claim 5, which has a composition of CaO: 0 to 9%, SrO: 3 to 12.5%, BaO: 0 to 2%, MgO + CaO + SrO + BaO: 9 to 18%. In the raw material supply method of dropping the glass raw material from the hopper onto the conveyance pan and moving the conveyance pan toward the glass dissolution vessel so that the glass raw material on the conveyance pan is put into the glass dissolution vessel,
The insertion member inserted into the glass raw material on the transport pan relatively scrapes the glass raw material on the transport pan as the transport pan advances, and a plurality of raw material stacks arranged in the width direction of the transport pan. Make
The cutter inserted into the glass raw material on the transport pan pushes out at least a part of each raw material pile on the transport pan relative to the transport pan as the transport pan moves backward, and the glass melting tank Raw material supply method   The raw material supply method according to claim 7, wherein the rear portion of the insertion member has a tapered cross-sectional shape.   The raw material supply method according to claim 7 or 8, wherein a width of the insertion member is 75 to 150 mm.   The raw material supply method of any one of Claims 7-9 which divides | segments the glass raw material on the said conveyance bread | pan into a some area | region in the width direction, and adjusts thickness. The glass material is a non-alkali glass material,
The inorganic alkali glass, by mass percentage based on _{oxides, SiO 2: 50~66%, Al} 2 O 3: 10.5~24%, B 2 O 3: 0~12%, MgO: 0~8 %, CaO: 0 to 14.5%, SrO: 0 to 24%, BaO: 0 to 13.5%, MgO + CaO + SrO + BaO: 9 to 29.5 %. The raw material supply method as described. The alkali-free glass, by mass percentage based on _{oxides, SiO 2: 58~66%, Al} 2 O 3: 15~22%, B 2 O 3: 5~12%, MgO: 0~8%, The raw material supply method according to claim 11, which has a composition of CaO: 0 to 9%, SrO: 3 to 12.5%, BaO: 0 to 2%, MgO + CaO + SrO + BaO: 9 to 18%.   The raw material supply apparatus according to any one of claims 1 to 6, a glass melting apparatus that melts a glass raw material supplied by the raw material supply apparatus to produce molten glass, and the glass melting apparatus. An apparatus for producing a glass plate, comprising: a molding device for forming molten glass into a plate shape.   The manufacturing method of the glass plate which manufactures a glass plate using the manufacturing apparatus of the glass plate of Claim 13.

Images