KR20220117197A - Method for manufacturing a glass article and an apparatus for manufacturing a glass article - Google Patents

Abstract

The manufacturing apparatus 1 of a glass article connects with the shaping|molding furnace 2 which shape|molds the glass ribbon Gr by the down-draw method, and the slow cooling furnace which connects below the shaping|molding furnace 2, and slowly cools the glass ribbon Gr. (3) and the cooling unit 4 communicating below the slow cooling furnace 3 to cool the glass ribbon Gr, and a molding slow cooling chamber ( 6) and a cooling chamber 7 in which the cooling unit 4 is disposed. The shaping|molding slow cooling chamber 6 is the 1st chamber 6a in which the upper part of the shaping|molding furnace 2 and the slow cooling furnace 3 is arrange|positioned inside, and the 2nd chamber 6b in which the lower part of the slow cooling furnace 3 is arrange|positioned inside. ) is provided. The first chamber 6a has a pressurizing mechanism 16 for pressurizing the inside of the first chamber 6a, and the second chamber 6b has an exhaust mechanism 20 for exhausting the gas in the second chamber 6b to the outside. ) is provided.

Description

Method for manufacturing a glass article and an apparatus for manufacturing a glass article

The present invention relates to a method for manufacturing a glass article and an apparatus for manufacturing a glass article.

As a manufacturing apparatus for manufacturing the glass article for displays, such as a liquid crystal display and organic electroluminescent display, for example, it communicates below the molding furnace which shape|molds a glass ribbon by a down-draw method, and a shaping|molding furnace, and a glass ribbon is annealed. What provided with the slow cooling furnace and the cooling part which communicates below the slow cooling furnace and cools a glass ribbon is mentioned.

Here, as a glass article, glass plates, such as a substantially rectangular shape which cut|disconnected the glass ribbon to predetermined length, the glass roll etc. which wound up the glass ribbon in roll shape around the core etc. are mentioned. In the case of a glass roll, cutting out a glass plate over many sheets can also be performed easily, for example.

In the case of this kind of manufacturing apparatus, a shaping|molding furnace, a slow cooling furnace, and a cooling part comprise the cylindrical space which communicates in an up-down direction, This cylindrical space becomes a conveyance booth of a glass ribbon. And since a part in this conveyance booth becomes high temperature, an upward airflow may generate|occur|produce in a conveyance booth by the chimney effect. This updraft has a bad influence on the slow cooling process of the glass ribbon in a slow cooling furnace, and there exists a possibility that the deformation|transformation of a glass ribbon may worsen.

In particular, in the case of manufacturing a glass article with small heat shrinkage in order to cope with the recent high-definition display, the upward airflow generated in the conveyance booth becomes a problem. That is, in order to reduce the thermal contraction of a glass article, it is effective to slowly cool over a long time at the slow cooling (cooling) speed|rate in the slow cooling process of a glass ribbon. Therefore, in order to satisfy this condition, lengthening of the slow cooling furnace is attained, and the glass ribbon in a slow cooling furnace is easy to receive the influence of an updraft.

Then, for example, in patent document 1, pressurizing the inside of the shaping|molding slow cooling chamber in which the shaping|molding furnace and the slow cooling furnace were arrange|positioned inside by pressurizing mechanisms, such as a pressure fan, is disclosed. Thus, when the inside of a shaping|molding slow cooling chamber is pressurized, since it can reduce that gas flows out from the gap, etc. of the furnace wall of a shaping|molding furnace and an slow cooling furnace, the upward airflow in a conveyance booth can be suppressed. Moreover, when a large amount of gas flows out from the gap of the furnace wall of a shaping|molding furnace or an slow cooling furnace, etc., the rise of the gas in a conveyance booth will increase and it will become easy to generate|occur|produce an updraft.

Japanese Patent Laid-Open No. 2017-154911

However, as disclosed in Patent Document 1, when the inside of the molding slow cooling chamber is pressurized, the atmospheric pressure in the molding slow cooling chamber increases. There is a possibility that foreign substances in the cold chamber may penetrate into the slow cooling furnace from the gap between the furnace walls of the slow cooling furnace. This foreign material contains the iron powder which generate|occur|produces from the bearing part etc. of the annealer roller extended outside the slow cooling furnace. And when such a foreign material adheres to a glass ribbon, the problem that the surface quality of glass articles, such as a manufactured glass plate, falls may arise.

This invention makes it a subject to suppress adhesion of the foreign material to a glass ribbon, suppressing the deterioration of the deformation|transformation of a glass ribbon, when manufacturing a glass article by the down-draw method.

The present invention devised in order to solve the above problems is a molding furnace for molding a glass ribbon by a down-draw method, a slow cooling furnace communicating below the molding furnace to slowly cool the glass ribbon, and communicating below the slow cooling furnace, A method for manufacturing a glass article using a manufacturing apparatus including a cooling unit for cooling a glass ribbon, a molding slow cooling chamber having a molding furnace and an annealing furnace disposed therein, and a cooling chamber having a cooling unit disposed therein, the molding slow cooling chamber comprising: , in a state in which the first chamber in which the upper part of the forming furnace and the slow cooling furnace is disposed and the second chamber in which the lower part of the slow cooling furnace is disposed inside, while pressurizing the inside of the first chamber by the pressurizing mechanism, the exhaust mechanism It is characterized in that the gas in the second chamber is exhausted to the outside.

In this way, since the inside of the first chamber of the molding slow cooling chamber is pressurized by the pressurizing mechanism, it is possible to reduce the outflow of gas from the gaps (eg, joints) of the furnace wall at the upper part of the molding furnace and/or the slow cooling furnace. . As a result, the updraft in each inside (inside a conveyance booth) of a shaping|molding furnace, a slow cooling furnace, and a cooling part can be suppressed. Therefore, the deterioration of the deformation|transformation of the glass ribbon by an updraft can be suppressed. Further, a second chamber is formed in the molding slow cooling chamber, and since the gas in the second chamber is exhausted to the outside by the exhaust mechanism, foreign substances in the second chamber corresponding to the lower part of the molding annealing chamber are also discharged to the outside together with the gas. do. Therefore, it can suppress that the foreign material in a 2nd chamber penetrate|invades into the slow cooling furnace from the gap etc. of the furnace wall in the lower part of the slow cooling furnace. Therefore, adhesion of the foreign material to a glass ribbon can be suppressed.

In the above configuration, it is preferable that the atmospheric pressure in the first chamber is higher than the atmospheric pressure in the second chamber, and the atmospheric pressure in the second chamber is lower than the atmospheric pressure in the cooling chamber.

In this way, among the first chamber, the second chamber, and the cooling chamber, the atmospheric pressure in the second chamber is the lowest, so that the foreign matter in the first chamber and the foreign matter in the cooling chamber are easily introduced into the second chamber. Therefore, the foreign matter in the first chamber and the foreign matter in the cooling chamber can also be discharged from the second chamber to the outside by the exhaust mechanism. Therefore, adhesion of the foreign material to a glass ribbon can be suppressed more reliably.

Said structure WHEREIN: It is preferable that the atmospheric pressure of the lower part of an slow cooling furnace is higher than atmospheric pressure of a 2nd chamber.

In this way, it can suppress more reliably that the foreign material in a 2nd chamber penetrate|invades into the lower part of an annealing furnace. Moreover, even if an updraft generate|occur|produced in a cooling part, since the updraft which generate|occur|produced in a cooling part is drawn in into the 2nd chamber from the gap of a furnace wall etc. at the lower part of an slow cooling furnace, the updraft in the upper part of a shaping|molding furnace and an slow cooling furnace. can be suppressed. Therefore, the deterioration of the deformation|transformation of the glass ribbon by an updraft can be suppressed more reliably.

When adjusting the atmospheric pressure of the lower part of a slow cooling furnace to be higher than atmospheric pressure of a 2nd chamber, it is preferable that the position corresponding to the strain point temperature of a glass ribbon is contained in the upper part of an slow cooling furnace.

Since the upward airflow in the position corresponding to the strain point temperature which affects the distortion of a glass ribbon can be suppressed reliably by doing in this way, the distortion of a glass ribbon can fully be reduced.

When adjusting the atmospheric pressure of the lower part of the slow cooling furnace to be higher than the atmospheric pressure of a 2nd chamber, you may have a flow path which guides a part of gas in a slow cooling furnace to a 2nd chamber on the side wall of the lower part of an slow cooling furnace.

In this way, the upward airflow generated by the cooling unit is easily drawn into the second chamber through the flow path from the lower part of the slow cooling furnace. Therefore, the deterioration of the deformation|transformation of a glass ribbon can be suppressed more reliably.

In the above configuration, it is preferable that the inside of the first chamber is pressurized by the pressurization mechanism and the gas in the first chamber is exhausted to the outside at a position different from that of the pressurization mechanism.

In this way, it becomes easy to adjust the atmospheric pressure in a 1st chamber. In addition, although the first chamber can be heated to a high temperature by the heat of the furnace, the temperature in the first chamber can be appropriately lowered because the gas in the first chamber is easily replaced by circulating it.

When the gas in the first chamber is exhausted to the outside, cold air is supplied into the room from the upper part of the first chamber by the pressurization mechanism, and hot air is exhausted from the upper part of the first chamber to the outdoors in a position different from the pressurization mechanism. it is preferable

In this way, since the cold air has a high density and tends to descend, and the hot air has a low density and tends to rise, the gas can be efficiently circulated into the first chamber. Therefore, the air temperature in the first room can be effectively lowered.

In the above configuration, it is preferable that the gas in the second chamber is exhausted by the exhaust mechanism and the gas is supplied into the second chamber at a position different from the exhaust mechanism.

In this way, it becomes easy to adjust the atmospheric pressure in a 2nd chamber. In addition, although the second chamber can be heated to a high temperature by the heat of the furnace, since the gas in the second chamber is easily exchanged, the air temperature in the second chamber can be appropriately lowered.

This invention devised in order to solve the said subject is a forming furnace which shape|molds a glass ribbon by a down-draw method, a slow cooling furnace which communicates below the shaping|molding furnace, and slowly cools a glass ribbon, It communicates below the slow cooling furnace, and glass An apparatus for manufacturing a glass article comprising a cooling unit for cooling a ribbon, a molding slow cooling chamber having a molding furnace and an annealing furnace disposed therein, and a cooling chamber having a cooling unit disposed therein, the molding slow cooling chamber comprising: A first chamber having an upper portion disposed therein, and a second chamber having a lower portion of the slow cooling furnace disposed therein, comprising: a pressurizing mechanism for pressurizing the inside of the first chamber; and an exhaust mechanism for exhausting the gas in the second chamber to the outside; It is characterized in that it is additionally provided.

In this way, it is possible to enjoy the same operational effects as the corresponding structures described above.

ADVANTAGE OF THE INVENTION According to this invention, when manufacturing a glass article by the down-draw method, adhesion of the foreign material to a glass ribbon can be suppressed, suppressing the deterioration of the deformation|transformation of a glass ribbon.

1 is a schematic side view of an apparatus for manufacturing a glass article according to a first embodiment of the present invention;
2 is a schematic side view of an apparatus for manufacturing a glass article according to a second embodiment of the present invention;
It is a schematic side view which expands and shows the 1st chamber periphery of the shaping|molding slow cooling chamber of the manufacturing apparatus of the glass article which concerns on 3rd Embodiment of this invention.
4 is a schematic side view of an apparatus for manufacturing a glass article according to a fourth embodiment of the present invention;

EMBODIMENT OF THE INVENTION Hereinafter, embodiment of this invention is described with reference to an accompanying drawing. In addition, in each embodiment, the overlapping description may be abbreviate|omitted by attaching|subjecting the same code|symbol to the corresponding component. In the case where only a part of the configuration is described in each embodiment, the configuration of the other embodiment described above can be applied to other parts of the configuration. In addition, not only the combination of the structures indicated in description of each embodiment, but unless a problem in particular does not arise in a combination, even if it is not explicitly stated, it is possible to combine the structures of several embodiment partially.

(First embodiment)

As shown in FIG. 1, the manufacturing apparatus 1 of the glass article which concerns on 1st Embodiment of this invention is an apparatus which manufactures the glass plate G as a glass article by the overflow down-draw method, The building X of make up part In addition, the inside of the building X is managed by positive pressure in order to suppress the intrusion of outside air.

This manufacturing apparatus 1 has the shaping|molding furnace 2, the slow cooling furnace 3 arrange|positioned below the shaping|molding furnace 2, the cooling part 4 arrange|positioned below the slow cooling furnace 3, and cooling A cutting chamber 5 disposed below the portion 4, a molding slow cooling chamber 6 having a molding furnace 2 and an annealing furnace 3 disposed therein, and a cooling unit 4 disposed therein A cooling chamber (7) is provided. The shaping|molding slow cooling chamber 6, the cooling chamber 7, and the cutting chamber 5 are a process chamber (for example, a clean room) which divides and forms the space which can block|block contaminants from the outside to some extent.

The shaping|molding furnace 2, the slow cooling furnace 3, and the cooling part 4 partition-form the cylindrical space which communicates in an up-down direction with walls 8a-8d. The cylindrical space with a lid including the walls 8a-8d becomes the conveyance booth 9 of the glass ribbon Gr shape|molded in the shaping|molding furnace 2 . Moreover, the conveyance booth 9 is between the upper part 3a of the shaping|molding furnace 2 and the slow cooling furnace 3, between the upper part 3a of the slow cooling furnace 3, and the lower part 3b of the slow cooling furnace 3, Partition members 10a to 10d made of a floor surface of the building X or the like between the lower portion 3b and the cooling unit 4 of the slow cooling furnace 3 and between the cooling unit 4 and the cutting chamber 5 is partitioned by An opening for passing the glass ribbon Gr is formed in each partition member 10a to 10d. Moreover, you may abbreviate|omit the partition members 10a-10d in the conveyance booth 9, and you may add a partition member between each partition member 10a-10d.

Inside the molding furnace 2, the molded object 11 which shape|molds the glass ribbon Gr from the molten glass Gm by the overflow down-draw method is arrange|positioned. The molten glass Gm supplied to the molded body 11 overflows from the groove formed at the top of the molded body 11, and the overflowed molten glass Gm rides on the side surfaces of both sides of the molded body 11 and joins at the bottom. By doing so, plate-shaped glass ribbon Gr is continuously shape|molded. The glass ribbon Gr shape|molded is conveyed to the downstream (preferably vertically downward) of the conveyance booth 9 with a vertical attitude|position (preferably vertical attitude|position).

The slow cooling furnace 3 is a furnace for reducing the deformation|transformation of the glass ribbon Gr shape|molded by the shaping|molding furnace 2 . The inside of the slow cooling furnace 3 has a predetermined|prescribed temperature gradient toward the downward direction. The glass ribbon Gr is slowly cooled (annealed) so that temperature may become low as it moves toward the inside of the slow cooling furnace 3 downward. The temperature gradient in the slow cooling furnace 3 can be adjusted by the heater (not shown) arrange|positioned in the slow cooling furnace 3, for example.

The cooling part 4 is a space for radiating heat to the glass ribbon Gr slowly cooled by the slow cooling furnace 3, and cooling it to room temperature vicinity. In addition, the heater is not arrange|positioned in the cooling part 4 .

In the slow cooling furnace 3, the edge roller 12 which regulates the width direction shrinkage|contraction of the glass ribbon Gr just below the molded object 11 is arrange|positioned. The edge roller 12 pinches the width direction both ends of the glass ribbon Gr from front and back both sides. Thereby, the edge part which becomes thicker relatively than the width direction center part of the glass ribbon Gr is formed in the width direction both ends of the glass ribbon Gr. Moreover, although the case where the edge roller 12 is arrange|positioned in the slow cooling furnace 3 was illustrated, the edge roller 12 may be arrange|positioned in the shaping|molding furnace 2 .

In the slow cooling furnace 3 , an annealer roller 13 is disposed below the edge roller 12 . The annealer roller 13 is provided in multiple stages in the vertical direction. The annealer roller 13 is constituted of, for example, a roller made of an inorganic material such as ceramics.

In the cooling part 4, the support roller 14 which clamps the glass ribbon Gr from front and back both sides is arrange|positioned. The support roller 14 is arranged in one stage or multiple stages (illustrated example) in the vertical direction. The support roller 14 is constituted of, for example, a roller made of a heat-resistant resin material such as rubber.

A cutting device (not shown) is disposed in the cutting chamber 5 . A cutting apparatus is an apparatus for cutting|disconnecting the glass ribbon Gr cooled by the cooling part 4 for every predetermined length, and obtaining the glass plate G. The cutting method by a cutting device is not specifically limited, For example, bending stress cutting, laser cutting, laser cutting, etc. can be used.

As for the shaping|molding slow cooling chamber 6, the 1st chamber 6a in which the upper part 3a of the shaping|molding furnace 2 and the slow cooling furnace 3 is arrange|positioned inside, and the lower part 3b of the slow cooling furnace 3 are arrange|positioned inside. and a second chamber 6b that becomes In this embodiment, in the upper part 3a of the slow cooling furnace 3, the position corresponding to the slow cooling point temperature of the glass ribbon Gr, and the position corresponding to the strain point temperature of the glass ribbon Gr are contained. Here, the annealing point temperature means a temperature at which strain is removed when maintained at substantially this temperature for 15 minutes, and the strain point temperature means a temperature at which no strain is generated in the glass even if it is rapidly cooled below that temperature. The strain point temperature is lower than the slow cooling point temperature, for example, by 30 to 150°C. That is, the position corresponding to the slow cooling point temperature of the glass ribbon Gr is located above the position corresponding to the strain point temperature of the glass ribbon Gr.

Between the first chamber 6a and the second chamber 6b, between the second chamber 6b and the cooling chamber 7, and between the cooling chamber 7 and the cutting chamber 5, the floor of the building X is The partition is partitioned by partition members 15a to 15c made of cotton or the like. The partition members 15a to 15c may be configured to allow gas to flow. For example, the partition members 15a to 15c may have a gap between the partition members 15a and 15c through which the gas can flow with the transport booth 9 . In addition, although the case where the vertical direction position of the partition members 15a-15c is the same as the vertical direction position of the partition members 10b-10d in the conveyance booth 9 is illustrated, the up-down direction position of both may be different.

The glass article manufacturing apparatus 1 is further equipped with the 1st press mechanism 16 which presses the inside of the 1st chamber 6a. Here, the inside of the 1st chamber 6a means the space outside the upper part 3a of the shaping|molding furnace 2 and the slow cooling furnace 3 .

In the present embodiment, the first pressurization mechanism 16 includes an outdoor air duct 17 connected to the outdoors (outside of the building X), and an air supply fan that introduces outdoor gas (external air) from the outdoor air duct 17 ( 18) and an air conditioner provided with an air supply duct 19 for supplying gas introduced from the air supply fan 18 into the first chamber 6a.

This manufacturing apparatus 1 is further provided with the exhaust mechanism 20 which exhausts the gas in the 2nd chamber 6b to the outside. Here, the inside of the 2nd chamber 6b means the space outside the lower part 3b of the slow cooling furnace 3 . The exhaust mechanism 20 is preferably configured to depressurize the inside of the second chamber 6b in accordance with the exhaust of the gas in the second chamber 6b.

In the present embodiment, the exhaust mechanism 20 includes a ventilation duct 21 connected to the second chamber 6b, an exhaust fan 22 that introduces gas in the second chamber 6b from the ventilation duct 21, and , an exhaust duct 23 for exhausting the gas introduced from the exhaust fan 22 to the outdoors.

In this manufacturing apparatus 1, atmospheric pressure adjustment is performed so that the atmospheric pressure of the 2nd chamber 6b may become lower than the atmospheric pressure of the lower part 3b of the slow cooling furnace 3. As shown in FIG.

In the present manufacturing apparatus 1 , the atmospheric pressure in the first chamber 6a is higher than the atmospheric pressure in the second chamber 6b and the atmospheric pressure in the second chamber 6b is lower than the atmospheric pressure in the cooling chamber 7 . adjustment is made

The present manufacturing apparatus 1 further includes a second pressurizing mechanism 24 for pressurizing the inside of the cooling unit 4 . Here, the inside of the cooling chamber 7 means the space outside the cooling part 4 . It is preferable that the 2nd press mechanism 24 is comprised so that the inside of the cooling part 4 may be pressurized so that the atmospheric pressure of the cooling part 4 may become higher than the atmospheric pressure of the cutting chamber 5. As shown in FIG. In addition, the 2nd press mechanism 24 may be abbreviate|omitted.

In the present embodiment, the second pressurization mechanism 24 includes an outdoor air duct 25 connected to the outdoors, an air supply fan 26 that introduces outdoor gas from the outdoor air duct 25 , and the air supply fan 26 . It consists of an air conditioner having an air supply duct 27 for supplying one gas into the cooling unit 4 . It is preferable that the air supply duct 27 is connected to the cooling part 4 below the lower part of the cooling part 4 close to the cutting chamber 5, specifically, below the lowermost support roller 14. In addition, the case where the floor of the building X on which the outside air duct 25 and the air supply fan 26 are arranged is the floor below the floor of the building X where the air supply duct 27 is connected to the cooling part 4, However, the arrangement aspect of the air conditioner is not limited to this.

In the present embodiment, the second pressing mechanism 24 further includes a temperature control unit 28 and a filter unit 29 . As the temperature control unit 28, for example, a sheath heater, an energized heating device (which energizes the piping of the second pressurizing mechanism 24), an induction heating device, or the like can be used. As the filter part 29, for example, a filter for coarse dust, a medium-performance filter (for example, a MEPA filter), a high-performance filter (for example, a HEPA filter, a ULPA filter, etc.), etc. can be used. In addition, at least one of the temperature control part 28 and the filter part 29 may be abbreviate|omitted.

Next, the manufacturing method of the glass article which concerns on this embodiment is demonstrated. This manufacturing method is a method of manufacturing the glass plate G as a glass article using the said manufacturing apparatus 1.

As shown in FIG. 1, this manufacturing method is the shaping|molding process of shape|molding the glass ribbon Gr by the overflow down-draw method in the shaping|molding furnace 2, The shape|molded glass ribbon Gr is slow-cooling furnace 3 The slow cooling process to be slowly cooled in , the cooling process to cool the annealed glass ribbon Gr by the cooling part 4, and the cutting process which cut|disconnects the cooled glass ribbon Gr in the cutting chamber 5 are provided.

In this manufacturing method, the first pressurization step of pressurizing the inside of the first chamber 6a by the first pressurizing mechanism 16 and the exhausting of the gas in the second chamber 6b to the outside by the exhaust mechanism 20 are performed. An exhaust process is further provided. A 1st pressurization process and an exhaust process are performed in parallel with the said shaping|molding process, an slow cooling process, a cooling process, and a cutting process.

Specifically, in the first pressurization step, gas is supplied into the first chamber 6a by the first pressurization mechanism 16 to increase the atmospheric pressure in the first chamber 6a. Thereby, it can reduce that gas flows out from gaps, such as a joint of the walls 8a, 8b of the upper part 3a of the shaping|molding furnace 2 and/or the slow cooling furnace 3, etc. As a result, the air volume of the updraft which flows through the conveyance booth 9 can be suppressed. Therefore, in the slow cooling furnace 3, when the slow cooling temperature becomes non-uniform|heterogenous or the glass ribbon Gr shakes, the situation that the deformation|transformation of the glass ribbon Gr worsens can be suppressed.

Here, the temperature of the conveyance booth 9 becomes high as it goes upward, and atmospheric pressure becomes high easily. Therefore, in the 2nd chamber 6b corresponding to the lower part of the shaping|molding slow cooling chamber 6 compared with the 1st chamber 6a corresponding to the upper part of the shaping|molding slow cooling chamber 6, WHEREIN: The differential pressure tends to be small. That is, when the second chamber 6b is pressurized similarly to the first chamber 6a , the foreign matter in the second chamber 6b easily penetrates into the slow cooling furnace 3 . Therefore, only the first chamber 6a is directly pressed by the first pressing mechanism 16 .

However, each atmospheric pressure of the upper part 3a of the shaping|molding furnace 2 and the slow cooling furnace 3 is the 1st chamber 6a of the shaping|molding slow cooling chamber 6 by adjusting the pressurization conditions by the 1st pressure mechanism 16. ) is maintained at a higher than atmospheric pressure.

It is preferable that the differential pressure between the molding furnace 2 (high pressure side) and the first chamber 6a (low pressure side) is, for example, 5 to 50 Pa, and the upper part 3a (high pressure side) of the slow cooling furnace 3 . It is preferable that the differential pressure between and the 1st chamber 6a (low-pressure side) is 5-40 Pa, for example. The differential pressure is managed by the pressure sensors 30, 31, and 32, but a predetermined differential pressure gauge may be used. The value of the differential pressure is not particularly limited and can be appropriately adjusted. In addition, the pressure difference between the first chamber 6a (high pressure side) and the outside (low pressure side) of the building X may be, for example, 20 to 100 Pa.

In the exhaust process, the foreign matter in the second chamber 6b is discharged to the outside by the exhaust mechanism 20 together with the gas in the second chamber 6b. Therefore, it can suppress that foreign material in the 2nd chamber 6b penetrates into the lower part 3b of the slow cooling furnace 3 from the gaps, such as a joint of the wall 8c of the lower part 3b of the slow cooling furnace 3, have. Therefore, adhesion of the foreign material to the glass ribbon Gr conveyed in the inside of the conveyance booth 9 can be suppressed.

In the exhaust process, it is preferable to depressurize the inside of the second chamber 6b in the process of exhausting the gas in the second chamber 6b by the exhaust mechanism 20 . Specifically, it is preferable that the atmospheric pressure in the lower part 3b of the slow cooling furnace 3 be maintained in a state higher than the atmospheric pressure in the second chamber 6b by adjusting the pressure reduction condition by the exhaust mechanism 20 . In this way, it is more reliable that the foreign material in the 2nd chamber 6b penetrates into the lower part 3b of the slow cooling furnace 3 from the gaps, such as the joint of the wall 8c of the lower part 3b of the slow cooling furnace 3 can be suppressed. In addition, even if an updraft is generated in the cooling unit 4, the rising airflow generated in the cooling unit 4 is drawn in from the lower part 3b of the slow cooling furnace 3 to the second chamber 6b, so that the forming furnace (2) and the air volume of the updraft in the upper part 3a of the slow cooling furnace 3 can be suppressed. Moreover, in this embodiment, in order to make it easy to form the airflow which goes to the 2nd chamber 6b from the lower part 3b of the slow cooling furnace 3, it is slow cooling in the wall 8c of the lower part 3b of the slow cooling furnace 3 A hole H constituting a flow path for guiding a part of the gas in the furnace 3 to the second chamber 6b is formed. The hole H may be omitted.

The pressure difference between the lower part 3b (high pressure side) of the slow cooling furnace 3 and the 2nd chamber 6b (low pressure side) is managed so that it may become 2-30 Pa, for example. The differential pressure is managed by the pressure sensors 33 and 34, but a predetermined differential pressure gauge may be used. The value of the differential pressure is not particularly limited and can be appropriately adjusted.

When adjusting the atmospheric pressure of the lower part 3b of the slow cooling furnace 3 higher than the atmospheric pressure of the 2nd chamber 6b, the position corresponding to the strain point temperature of the glass ribbon Gr is the upper part 3a of the slow cooling furnace 3 It is preferable to be included in If it does in this way, even if the rising airflow generate|occur|produced in the cooling part 4, the rising airflow which generate|occur|produced in the cooling part 4 is the lower part of the slow cooling furnace 3 lower than the position corresponding to the strain point temperature of the glass ribbon Gr. In (3b), it is drawn into the second chamber 6b. Therefore, an upward airflow can be suppressed reliably at the position corresponding to the strain point temperature of the glass ribbon Gr. Since the strain point temperature of the glass ribbon Gr is an important temperature that determines the strain of the glass ribbon Gr, when an updraft is suppressed at a position corresponding to this temperature, the strain of the glass ribbon Gr is sufficiently reduced. can do. Moreover, when the position corresponding to the strain point temperature of the glass ribbon Gr is contained in the lower part 3b of the slow cooling furnace 3, the airflow which goes from the lower part 3b of the slow cooling furnace 3 to the 2nd chamber 6b. There exists a possibility that the deformation|transformation of the glass ribbon Gr may deteriorate by this.

In the present manufacturing method, the atmospheric pressure in the first chamber 6a is higher than the atmospheric pressure in the second chamber 6b, and the atmospheric pressure in the second chamber 6b is higher than the atmospheric pressure in the second chamber 6b due to the pressure conditions in the pressurization step, the pressure reduction conditions in the exhaust step, or the like. It is preferable to maintain at a state lower than the atmospheric pressure of this cooling chamber 7 . In this way, the atmospheric pressure in the second chamber 6b is the lowest among the first chamber 6a, the second chamber 6b, and the cooling chamber 7 . Therefore, foreign matter in the first chamber 6a and the foreign matter in the cooling chamber 7 are also introduced into the second chamber 6b from, for example, the gap between the partition members 15a and 15b. As a result, the foreign matter in the first chamber 6a and the foreign matter in the cooling chamber 7 are also easily discharged from the second chamber 6b to the outside by the exhaust mechanism 20 . Therefore, adhesion of the foreign material to the glass ribbon Gr conveyed in the inside of the conveyance booth 9 can be suppressed more reliably.

The pressure difference between the first chamber 6a (high pressure side) and the second chamber 6b (low pressure side) is preferably 10 to 60 Pa, for example. It is preferable that the differential pressure|pressure of the cooling chamber 7 (high pressure side) and the 2nd chamber 6b (low pressure side) is more than 0 - 20 Pa, for example. The differential pressure is managed by the pressure sensors 32, 34, and 36, but a predetermined differential pressure gauge may be used. The value of the differential pressure is not particularly limited and can be appropriately adjusted.

Moreover, in this manufacturing method, while performing these shaping|molding process, an slow cooling process, a cooling process, and a cutting process, the 2nd pressurization process of pressurizing the inside of the cooling part 4 with the 2nd press mechanism 24 is further provided. A 2nd pressurization process is performed in parallel with the said shaping|molding process, an slow cooling process, a cooling process, and a cutting process.

Specifically, in the second pressurization step, gas is supplied into the cooling unit 4 by the second pressurizing mechanism 24 to increase the atmospheric pressure of the cooling unit 4 . Thereby, it can suppress that the foreign material (glass powder etc.) which generate|occur|produced in the cutting chamber 5 penetrates into the cooling part 4 .

In the second pressurization step, by adjusting the pressurization conditions by the second pressurizing mechanism 24 , it is preferable that the air pressure of the cooling unit 4 is maintained in a state higher than the air pressure of the cutting chamber 5 . In this way, it can suppress more reliably that the foreign material which generate|occur|produced in the cutting chamber 5 penetrates into the cooling part 4 .

It is preferable that the differential pressure|voltage of the cooling part 4 (high pressure side) and the cutting chamber 5 (low pressure side) is 0-6 Pa, for example. The differential pressure is managed by the pressure sensors 36 and 37, but a predetermined differential pressure gauge may be used. The value of the differential pressure is not particularly limited and can be appropriately adjusted.

In the second pressurization step, the temperature of the supply air is adjusted according to the temperature of the gas introduced from the outside air duct 25 by the temperature control unit 28 of the second pressurization mechanism 24 . Thereby, since the temperature in the conveyance booth 9 (especially the cooling part 4) can be adjusted, the air volume of the upward airflow which generate|occur|produces in the conveyance booth 9 by the chimney effect can be adjusted.

In the second pressurization step, foreign substances are removed from the gas supplied by the filter unit 29 of the second pressurization mechanism 24 . Thereby, gas with a high degree of cleanliness can be supplied to the cooling unit 4 .

In addition, in the exhaust process and/or the second pressurization process, by adjusting the pressure reduction condition by the exhaust mechanism 20 or the pressurization condition by the second pressure mechanism 24, the air pressure of the cooling unit 4 is increased in the second chamber ( It is preferable to maintain a state higher than the atmospheric pressure of 6b). In this way, foreign matter in the second chamber 6b does not easily penetrate into the cooling chamber 7 . In particular, as in the illustrated example, the upper surface of the cooling unit 4 is larger than the lower surface of the slow cooling furnace 3, and a part of the second chamber 6b and a part of the cooling unit 4 are interposed with a partition plate 15b. It is valid in case of face-to-face. In this case, it is possible to prevent a part of the foreign matter generated in the second chamber 6b from flowing into the cooling unit 4 from the gap between the partition plates 15b and the like.

It is preferable that the differential pressure of the cooling part 4 (high pressure side) and the 2nd chamber 6b (low pressure side) is 5-30 Pa, for example. The differential pressure is managed by the pressure sensors 34 and 35, but a predetermined differential pressure gauge may be used. The value of the differential pressure is not particularly limited and can be appropriately adjusted.

(Second Embodiment)

As shown in FIG. 2, the difference between the manufacturing apparatus 1 and manufacturing method of the glass article which concerns on 2nd Embodiment of this invention from 1st Embodiment is the 1st chamber 6a of the exhaust mechanism 41 is provided, and the air supply mechanism 51 is provided in the second chamber 6b.

The exhaust mechanism 41 includes a ventilation duct 42 connected to the first chamber 6a, an exhaust fan 43 for introducing gas in the first chamber 6a from the ventilation duct 42, and an exhaust fan 43 ) and an exhaust duct 44 for exhausting the gas introduced to the outdoors.

It is preferable that the amount of gas exhausted by the exhaust mechanism 41 is smaller than the amount of gas supplied by the pressurization mechanism 16 . That is, in the first chamber 6a, while gas is supplied by the pressurization mechanism 16, the gas is exhausted by the exhaust mechanism 41, but the exhaust by the exhaust mechanism 41 is auxiliary, and the pressurization mechanism 16 The pressurized state of the 1st chamber 6a by ) is maintained.

The air supply mechanism 51 includes an outdoor air duct 52 connected to the outdoors (outside of the building X), a supply fan 53 for introducing outdoor gas (external air) from the outdoor air duct 52, and a supply fan ( An air supply duct 54 for supplying the gas introduced in 53) into the second chamber 6b is provided.

It is preferable that the amount of gas supplied by the air supply mechanism (51) is smaller than the amount of gas supplied by the exhaust mechanism (20). That is, in the second chamber 6b, while gas is supplied by the air supply mechanism 51 and the gas is exhausted by the exhaust mechanism 20, the air supply by the air supply mechanism 51 is auxiliary, and the exhaust mechanism 20 ), the pressure-reduced state of the second chamber 6b is maintained.

In this way, since gas is supplied and exhausted in each of the first chamber 6a and the second chamber 6b, it becomes easy to adjust the atmospheric pressure in the first chamber 6a and the second chamber 6b. Further, the first chamber 6a and the second chamber 6b can be made high temperature by the heat of the forming furnace 2 and/or the slow cooling furnace 3, but in the first chamber 6a and/or the second Since it becomes easy to replace by circulating the gas in the chamber 6b, the temperature of each room can be suitably lowered.

Moreover, although the said embodiment demonstrated the case where the exhaust mechanism 41 was provided in the 1st chamber 6a and the air supply mechanism 51 was provided in the 2nd chamber 6b, the exhaust mechanism 41 and air supply were demonstrated. You may make it provide only either one of the mechanisms 51.

(Third embodiment)

As shown in FIG. 3, the difference between the manufacturing apparatus 1 and manufacturing method of the glass article which concerns on 3rd Embodiment of this invention from 2nd Embodiment is the supply of gas by the pressurization mechanism 16, The point is that gas is exhausted by the exhaust mechanism 41 from above the first chamber 6a.

Specifically, the pressurizing mechanism 16 supplies cold air C into the room from above the first chamber 6a on one side of the conveyance booth 9 . The exhaust mechanism 41 is at the side of the other side of the conveyance booth 9, hot air (cold air warmed by the influence of the forming furnace 2 and the slow cooling furnace 3) from above the first chamber 6a (W) ) to the outside. Here, the cold air C is, for example, room temperature (20°C±15°C), and the hot air W is, for example, 80°C±20°C.

In this way, since the cold air C has a high density and tends to descend, and the hot air W has a low density and tends to rise, the gas can be efficiently circulated in the first chamber 6a. Therefore, the air temperature in the 1st chamber 6a which tends to become high temperature by the influence of the shaping|molding furnace 2 and the slow cooling furnace 3 can be lowered efficiently.

Further, in the above embodiment, cold air is supplied into the room from above the first chamber 6a by the pressurizing mechanism 16, and the first chamber is supplied by the exhaust mechanism 41 at a position different from the pressurizing mechanism 16. Although the case where the hot air is exhausted to the outside from above in (6a) has been described, the above configuration is also applicable to the second chamber 6b. That is, cold air is supplied into the room from above the second chamber 6b by the air supply mechanism 51, and the second chamber 6b is cooled by the exhaust mechanism 20 at a position different from the air supply mechanism 51. You may exhaust the heat from above to the outside.

In addition, the cold air supply position and the hot air exhaust position are not limited to the upper direction, You may supply and exhaust from the side to the upper part of the 1st chamber 6a and/or the 2nd chamber 6b.

(Fourth embodiment)

As shown in FIG. 4, the manufacturing apparatus 1 and manufacturing method of the glass article which concern on 4th Embodiment of this invention are different from 2nd Embodiment, The evacuation mechanism 61 is also provided in the cooling part 4 as that has been installed.

The exhaust mechanism 61 includes a ventilation duct 62 connected to the cooling unit 4 , an exhaust fan 63 that introduces gas in the cooling unit 4 from the ventilation duct 62 , and an exhaust fan 63 . An exhaust duct (64) for exhausting the gas introduced into the outdoor area is provided.

In the cooling unit 4, in consideration of the influence of particles from the cutting chamber 5, it is preferable to keep the distance between the pressurizing mechanism 24 and the exhaust mechanism 61 as far apart as possible. Further, it is preferable to arrange the pressurizing mechanism 24 above the cooling unit 4 and the exhaust mechanism 61 at the lower portion of the cooling unit 4 . For this reason, in this embodiment, the exhaust mechanism 61 (ventilation duct 62) is arrange|positioned diagonally with the pressurization mechanism 24 (supply duct 27) arrange|positioned at the upper part of the cooling part 4. As shown in FIG. In this way, since the gas circulates in the cooling unit 4, the particles are reliably replenished and easily discharged to the outside.

In addition, this invention is not limited to the structure of the said embodiment, nor is it limited to the said effect and effect. Various changes are possible for this invention in the range which does not deviate from the summary of this invention.

The first pressurization mechanism 16 is not limited to a configuration that introduces gas from the outside of the building X, and for example, if it is outside the first room 6a, it can be used from any one place inside the building X. A configuration in which gas is introduced may be used. In this way, when gas is introduced from the inside of the building X, there is an advantage that the ducts 17 and 19 can be shortened. The configuration for introducing gas from the inside of the building X in this way can be applied similarly to the pressurization mechanism 24 and the air supply mechanism 51 .

The exhaust mechanism 20 is not limited to a configuration that exhausts gas to the outside of the building X, and for example, if it is outdoors of the second room 6b, the gas is discharged into any one place inside the building X. A configuration for exhausting may be sufficient. In this way, when the gas is exhausted into the interior of the building X, there is an advantage that the ducts 21 and 23 can be shortened. In addition, the exhaust mechanism 20 is configured to exhaust the gas in the second chamber 6b to the outside by using the differential pressure between the second chamber 6b and the portion where the gas is exhausted (eg, outside the building X). also good That is, the exhaust mechanism 20 does not include, for example, the exhaust fan 22, and exhausts the gas of the second chamber 6b to the outside through an opening formed in the wall portion of the second chamber 6b. also good These configurations are similarly applicable to the exhaust mechanisms 41 and 61 .

The exhaust mechanism 20 may further include a filter part like the second pressurization mechanism 24 . When foreign substances (iron, etc.) are removed from the exhausted gas by the filter unit, the high-purity gas can be exhausted to the outdoors. For the same reason, the exhaust mechanisms 41 and 61 may further include a filter unit.

The first pressing mechanism 16 may further include a filter part like the second pressing mechanism 24 . When foreign matter is removed from the gas supplied to the first chamber 6a by the filter unit, the gas with a high degree of cleanliness can be supplied to the first chamber 6a. For the same reason, the air supply mechanism 51 may further include a filter part.

The first press mechanism 16 may further include a temperature control unit like the second press mechanism 24 . If the temperature of the gas supplied to the first chamber 6a is adjusted by the temperature control unit, even if the gas in the first chamber 6a has penetrated into the upper part 3a of the molding furnace 2 or the slow cooling furnace 3 , it is thought that the confusion of molding conditions and slow cooling conditions can be reduced. For the same reason, the air supply mechanism 51 may further include a temperature control unit.

A pressurization mechanism (air supply mechanism) and/or an exhaust mechanism may be provided in the cooling chamber 7 and/or the cutting chamber 5 . In this way, it becomes easy to adjust the atmospheric pressure of the cooling chamber 7 and the cutting chamber 5. That is, the management of the differential pressure becomes easy.

A collection chamber for dropping and collecting waste glass from the cutting chamber 5 may be provided in the lower layer of the cutting chamber 5 .

The end surface which processes the 2nd cutting apparatus which cut|disconnects the width direction both ends containing the ear|edge part of glass plate G in the downstream of the cutting chamber 5, the manufacturing apparatus 1 of a glass article, and the end surface of glass plate G The processing apparatus, the washing|cleaning apparatus which wash|cleans the glass plate G, the inspection apparatus etc. which test|inspect the glass plate G may be further provided. Similarly, the manufacturing method of a glass article is the 2nd cutting process which cut|disconnects the width direction both ends of the glass plate G in the downstream of a cutting process, the end surface processing process which processes the end surface of glass plate G, glass plate G The washing|cleaning process to wash|clean, the test|inspection process of test|inspecting glass plate G, etc. may be further provided.

Although the glass plate G was illustrated in the said embodiment, the glass article is not limited to this, The glass roll etc. which wound up the glass ribbon Gr in roll shape around the core may be sufficient. In this case, the manufacturing apparatus 1 of a glass article cut|disconnects and removes the width direction both ends containing the ear|edge part of the glass ribbon Gr in the downstream of the cooling part 4, glass ribbon Gr You may further provide the winding-up apparatus etc. which wind up in roll shape and obtain a glass roll. Similarly, the manufacturing method of a glass article winds up the cutting process which cut|disconnects and removes the width direction both ends of the glass ribbon Gr in roll shape in the downstream of a cooling process, The winding process which winds up the glass ribbon Gr in roll shape, and obtains a glass roll You may be further equipped with a etc.

Although the case where the glass ribbon Gr (or a glass article) is shape|molded by the overflow down-draw method was illustrated in the said embodiment, other down-draw methods, such as a slot-down draw method and a re-draw method, can also be used.

1: Apparatus for manufacturing glass articles
2: molding furnace
3: Slow furnace
4: cooling unit
5: cutting room
6: molding slow cooling chamber
6a: first room
6b: 2nd room
7: cooling chamber
9: Return booth
11: molded body
16: first pressure mechanism
20: exhaust mechanism
24: second pressure mechanism
G: Glass plate (glass article)
Gr: Glass Ribbon

Claims (9)

A forming furnace for forming a glass ribbon by a down-draw method, a slow cooling furnace communicating below the forming furnace to slowly cool the glass ribbon, a cooling unit communicating below the slow cooling furnace to cool the glass ribbon; A method for manufacturing a glass article using a manufacturing apparatus including a molding annealing chamber in which the molding furnace and the slow cooling furnace are disposed, and a cooling chamber in which the cooling unit is disposed,
In a state in which the forming slow cooling chamber is divided into a first chamber in which the forming furnace and the upper portion of the slow cooling furnace are disposed, and a second chamber in which the lower portion of the slow cooling furnace is disposed therein,
A method for manufacturing a glass article, wherein the gas in the second chamber is exhausted to the outside by an exhaust mechanism while pressurizing the inside of the first chamber by a pressurizing mechanism. The method of claim 1,
The air pressure of the said 1st chamber is higher than the air pressure of the said 2nd chamber, and the air pressure of the said 2nd chamber is lower than the air pressure of the said cooling chamber. The manufacturing method of the glass article. 3. The method according to claim 1 or 2,
The manufacturing method of the glass article whose atmospheric pressure in the lower part of the said slow cooling furnace is higher than the atmospheric pressure of the said 2nd chamber. 4. The method of claim 3,
A method of manufacturing a glass article in which a position corresponding to the strain point temperature of the glass ribbon is included in the upper portion of the slow cooling furnace. 5. The method according to claim 3 or 4,
The manufacturing method of the glass article which provides the flow path which guides a part of gas in the said slow cooling furnace to the said 2nd chamber in the side wall of the lower part of the said slow cooling furnace. 6. The method according to any one of claims 1 to 5,
The manufacturing method of the glass article which pressurizes the inside of the said 1st chamber by the said pressurization mechanism, and exhausts the gas in the said 1st chamber to the outdoors at a position different from the said pressurization mechanism. 7. The method of claim 6,
A method for manufacturing a glass article in which cold air is supplied into the room from the upper part of the first chamber by the pressurizing mechanism, and hot air is exhausted to the outside from the upper part of the first chamber at a position different from the pressurization mechanism. 8. The method according to any one of claims 1 to 7,
A method for manufacturing a glass article in which gas in the second chamber is exhausted by the exhaust mechanism and gas is supplied into the second chamber at a position different from the exhaust mechanism. A forming furnace for forming a glass ribbon by a down-draw method, a slow cooling furnace communicating below the forming furnace to slowly cool the glass ribbon, a cooling unit communicating below the slow cooling furnace to cool the glass ribbon; An apparatus for manufacturing a glass article comprising: a molding slow cooling chamber in which the molding furnace and the slow cooling furnace are disposed; and a cooling chamber in which the cooling unit is disposed,
The forming slow cooling chamber includes a first chamber having the forming furnace and an upper portion of the slow cooling furnace disposed therein, and a second chamber having a lower portion of the slow cooling furnace disposed therein,
An apparatus for manufacturing a glass article, further comprising: a pressurizing mechanism for pressurizing the inside of the first chamber; and an exhaust mechanism for exhausting the gas in the second chamber to the outside.

Images