JP5019012B2 - Glass plate molded product manufacturing method and glass plate molded product manufacturing apparatus - Google Patents

Description

  The present invention relates to a method and an apparatus for manufacturing a glass plate molded product by softening a base material made of a glass plate to form a glass ribbon having a thickness smaller than that of the base material.

2. Description of the Related Art Conventionally, glass plates for semiconductor element substrates and displays are required to have good surface flatness and surface roughness. However, when a thin glass plate is manufactured by a float method or the like that is widely used as a manufacturing method of the current glass plate, the surface of the glass plate after molding is polished to obtain a glass plate applied to the above-mentioned use. It is preferable to improve surface flatness and surface roughness. For this reason, various means for increasing the accuracy of polishing a glass plate are provided. However, in order to increase the polishing accuracy, polishing time and labor are required more than the current level, which is problematic in terms of manufacturing cost and equipment cost. May occur.
Therefore, a base material made of a glass plate (hereinafter referred to as “glass plate base material”) having a predetermined plate thickness and having a certain degree of surface roughness is used, and this is softened by heating and softened. There has been known a redraw molding method for a glass plate that can produce a thin glass plate having a target surface thickness and a good surface state by stretching the glass plate (see, for example, Patent Documents 1 and 2).

This redraw molding method is a method in which a thick glass plate base material (for example, about 5 mm thick) is heated to a softening point or more and stretched to re-form the cross section thinly (for example, about 0.1 mm thick). Are known.
FIG. 5 shows a conventional example of this type of redraw molding apparatus. A redraw molding apparatus 100 shown in FIG. 5 includes a base material supply device 102 that is vertically movable while supporting a vertically long rectangular glass plate base material 101 suspended vertically, and a lower portion of the base material supply device 102. Are provided with a heating device 103 and a slow cooling device 105, and a pulling roll 106 for pulling and stretching the softened portion of the glass plate base material 101 downward.

  In the redraw molding apparatus 100, the glass plate base material 101 is usually a glass plate having a thickness of several millimeters, a width of several tens of millimeters to about 1 meter, and a length of several hundred to several thousand millimeters. A glass ribbon 107 having a width of several millimeters to several tens of millimeters and a thickness of a few millimeters is formed from the glass plate base material 101. Further, as shown in FIG. 5, in the redraw molding apparatus 100, a glass cutting device 108 is provided below the pulling roll 106, and a glass plate having a desired length is obtained by cutting the glass ribbon 107 to a desired length. A molded product 109 can be obtained.

Japanese Unexamined Patent Publication No. 2007-126302 Japanese Unexamined Patent Publication No. 2009-242190

By the way, in the redraw molding apparatus 100 having the conventional structure shown in FIG. 5, when the glass ribbon 107 is redraw molded by heating and softening in a state where the glass plate base material is pulled by the tension apparatus 106, the front side of the glass ribbon is inevitably. There is a problem that the rear end side is wasted.
For example, a portion that is first heated and softened by the heating device 103 has a problem that a glass sheet molded article of good quality cannot be produced from the start of production until the state of redraw molding is stabilized. This is because the shape and temperature distribution of the glass ribbon in the heating device are not stable.

When a predetermined time elapses after the start of production, the product is supplied to the heating device 103 and subjected to a desired redraw molding through a desired heat history, and a glass plate molded product 109 as a non-defective product is obtained.
Further, the base material supply device 102 descends while gripping the glass plate base material 101 by the claw portion 102 a formed in the lower portion thereof, and the production is finished when the claw portion 102 a is closest to the heating device 103. However, in this case, since the portion from the claw portion of the glass ribbon, which was the glass plate base material 101 supported by the claw portion 102a, to the cutting device remains inside the heating device 103, the glass of the remaining portion is glass. There is also a problem that the ribbon is wasted. Of course, the length of the portion that is wasted varies depending on the scale of the redraw molding apparatus, but when a glass plate base material having a total length of 3 m is used, it may be wasted about 1 m on the front end side and about 1 m on the rear end side.

That is, when the glass plate molded product 109 is molded using the redraw molding apparatus 100 having the conventional structure shown in FIG. 5, the material is inevitably wasted. Therefore, in order to increase productivity, The production of the glass plate molded product 109 is performed by setting the stretch ratio represented by the ratio (t ₀ / t) between the plate thickness (t ₀ ) and the plate thickness (t) of the glass plate molded product 109 as high as possible. It is common.
For example, in the manufacturing conditions described in Patent Document 1, the thickness of the glass plate base material 101 is 5 to 7 mm, whereas the thickness of the glass plate product is 0.38 to 0.64 mm. The stretching ratio is set to 10-15. The plate width of the glass plate base material was about 25 to 70 mm.

By the way, in recent years, the demand for ultra-thin glass is increasing in display applications, lighting applications, solar cell cover glasses, etc., and the ultra-thin glass sheets for these applications have a thickness of 0.2 mm or less or 0.1 mm or less. , The width is required to be 200 mm or more or 300 mm or more. However, when an ultrathin glass plate is produced by the above-described redraw molding method, the same magnification change occurs with respect to the width of the glass plate base material 101 in accordance with the draw rate. That is, the value obtained by dividing the width of the glass plate base material by the width of the glass molded product is substantially equal to the draw ratio. Therefore, the glass plate base material 101 needs a width corresponding to the stretching ratio. For example, in order to obtain a glass ultrathin plate having a width of 200 mm or more, it is necessary to use a glass plate base material 101 having a width exceeding 2 m. This is a problem that the production equipment becomes larger.
Further, when the production facility is increased in size, the movement control of the base material supply device 102 and the temperature control in the heating device 103 are required to have high accuracy, which causes a problem of increasing the equipment cost.
On the other hand, there is also proposed a method of performing redraw molding by adding another glass plate base material to the rear end portion of the glass plate base material as described in Patent Document 2 for the effective use of the glass plate base material. There is a problem that the quality of the glass plate molded product obtained from the joint portion of the plate base material is deteriorated and the quality of the glass substrate for display use cannot be satisfied.

The present invention eliminates the need to increase the width of the glass plate base material as in the prior art when manufacturing a wide glass plate molded product by redraw molding, and is easy to implement and can be realized while suppressing an increase in apparatus cost. One of the purposes is to provide a method for manufacturing a product.
In addition, the present invention provides a method for producing a glass plate molded product that can continuously supply a glass plate base material so that a wide glass plate molded product can be produced without reducing productivity. One purpose.
Furthermore, this invention aims at provision of the manufacturing apparatus of the glass plate molded product which can implement the manufacturing method of the said glass plate molded product and can provide a high quality glass plate product.

The present invention includes a stretching step of softening a glass sheet base material to form a glass ribbon by stretching the glass sheet to be narrower and thinner than the glass sheet base material, and cutting the glass ribbon in its width direction. A glass plate molding having a stretching ratio represented by a ratio of a plate thickness of the glass plate base material and a plate thickness of the glass plate molded product to 1.5 to 10 The present invention relates to a method for manufacturing a product.
In the manufacturing method of this invention, it is preferable that the plate | board thickness of the said glass plate base material is 0.3 mm or less.
In the manufacturing method of this invention, it is preferable that the plate width of the said glass plate molded product is 200 mm or more.
In the manufacturing method of this invention, it is preferable that the plate | board width of the said glass plate base material is 300 mm or more.
In the manufacturing method of this invention, it is preferable that the plate | board thickness of the said glass plate molded product is 0.1 mm or less.
In the production method of the present invention, it is preferable that the glass plate base material is a roll-shaped glass plate base material wound around a roll, and sheet glass is unwound and softened from the roll-shaped glass plate base material. .
In the manufacturing method of this invention, it is preferable that the said glass ribbon is wound up by a roll and becomes a roll-shaped glass plate molded product.
In the manufacturing method of this invention, you may have the process of cut | disconnecting the width direction edge part of a glass ribbon along the length direction of this glass ribbon between the said extending process and the said cutting process.
In the manufacturing method of this invention, it is preferable not to have the process of cut | disconnecting the width direction edge part of a glass ribbon along the length direction of this glass ribbon between the said extending process and the said cutting process.

The present invention includes a glass plate base material supply device, a heating device that heat-softens the glass plate base material supplied from the supply device to form a glass ribbon, a tension device that pulls the glass ribbon, and a post-stretching device. A first cutting device that cuts a glass ribbon into a glass plate molded product, and the supply device supplies the glass plate base material unwound from the roll-shaped glass plate base material that has been rolled. apparatus for producing a glass plate molded article for the method for manufacturing a glass sheet molded article of Ru Oh.
The manufacturing apparatus of the present invention includes a winding device that winds the glass ribbon as a roll-shaped glass plate molded product, and the glass ribbon tension is applied to the first cutting device side of the winding device by the tension device. It is preferable to provide means for adjusting the tension independently of the ribbon.
The manufacturing apparatus of the present invention is preferably provided with means for adjusting the tension of the unwound glass plate base material independently of the tension of the glass ribbon by the tensioning device between the supply device and the heating device.

The present invention includes a glass plate base material supply device, a heating device that heat-softens the glass plate base material supplied from the supply device to form a glass ribbon, a tension device that pulls the glass ribbon, and a post-stretching device. A first cutting device for cutting a glass ribbon to form a glass plate molded product, and a winding device for winding the glass ribbon as a roll-shaped glass plate molded product are provided, and the first cutting device of the winding device The present invention relates to a glass plate molded product manufacturing apparatus for the glass plate molded product manufacturing method provided with means for adjusting the tension of the glass ribbon independently of the tension of the glass ribbon by the tension device.
The manufacturing apparatus of the present invention may include a second cutting device that is provided between the pulling device and the first cutting device and removes both ends in the width direction of the glass ribbon .
The manufacturing apparatus of the present invention may include a slow cooling device that is provided between the heating device and the tensioning device and slowly cools the glass ribbon that has been softened by heating.

The present invention includes a stretching step of softening a glass sheet base material to form a glass ribbon by stretching the glass sheet to be narrower and thinner than the glass sheet base material, and cutting the glass ribbon in its width direction. A glass plate molding having a stretching ratio represented by a ratio of a plate thickness of the glass plate base material and a plate thickness of the glass plate molded product to 1.5 to 10 Since this is a manufacturing method of the product, even if the width of the target glass plate molded product is as wide as 200 mm or more or 300 mm or more, it is not necessary to make the base glass plate base material as large as before. . Therefore, even if the width of the target glass plate molded product is as wide as 200 mm or 300 mm or more, the glass plate molded product manufacturing apparatus is not increased in size, and the flatness is achieved while suppressing the improvement of the device cost. A glass plate molded product having excellent degree and surface roughness can be produced.
In addition, as a glass plate molded product obtained by a glass plate molded product manufacturing apparatus, a wide glass plate molded product with excellent flatness and surface roughness can be obtained, so that the flatness and surface roughness can be excellent. It is possible to provide an excellent glass plate molded product for required display device applications.

If the thickness of the glass plate base material is 0.3 mm or less, a glass plate molded product having a thickness of 0.1 mm or less can be easily obtained in the range of the stretch ratio of 1.5 or more and less than 10. It is possible to provide an extremely thin glass sheet molded product that is excellent in flexibility and can be wound.
If the thickness of the glass plate base material is 0.3 mm or less, the glass plate has sufficient flexibility so that a long glass plate base material wound in a roll can be procured. Can be supplied to the heating device while unwinding from the roll, so long glass plate base material can be applied to redraw molding, even if glass plate base material that is wasted at the start of production and at the end of production is taken into consideration Can reduce waste.

  By providing a winding device that winds the glass ribbon into a roll, a rolled glass sheet molded product can be obtained. Thereby, a long glass product can be obtained, and conveyance and storage are facilitated as a rolled glass sheet molded product. Moreover, since it is a roll-winding glass plate molded product by this, it is easy to utilize in another process for the purpose of another process.

FIG. 1 shows an apparatus for manufacturing a glass plate molded product according to the first embodiment of the present invention. FIG. 1 (A) is a schematic diagram showing the overall configuration, and FIG. 1 (B) is an apparatus for manufacturing the glass plate molded product. FIG. FIG. 2 is a schematic diagram showing the overall configuration of a glass plate molded product manufacturing apparatus according to a second embodiment of the present invention. FIG. 3 is a side view with a cross section of a part of a glass sheet molded product manufacturing apparatus according to a third embodiment of the present invention. FIG. 4 is a schematic diagram showing an overall configuration of a glass sheet molded product manufacturing apparatus according to a fourth embodiment of the present invention. FIG. 5 is a schematic diagram showing the overall configuration of a conventional redraw molding apparatus.

Hereinafter, although 1st embodiment of the manufacturing apparatus of the glass plate molded product which concerns on this invention is described based on drawing, this invention is not restrict | limited to the following embodiment. Moreover, in each figure shown below, about the reduced scale of each component, it simplifies and shows so that it may be easy to grasp | ascertain in the case of illustration.
FIG. 1 shows an entire configuration of a glass plate molded product manufacturing apparatus according to the present invention. A glass plate molded product manufacturing apparatus 20 according to the present embodiment horizontally supports a glass plate base material 1 made of plate glass. The base material supply device 5 rolled around the wound drum 3, the heating device 6 sequentially provided on the lower side of the base material supply device 5, the slow cooling device 7, the tension device 8, and the cutting device 9 ( A first cutting device) and a winding device (winding roll) 10.
Here, the glass plate base material is a raw material (base material) before molding and represents a flat glass plate or a roll-shaped glass plate wound up in a roll shape. Moreover, this glass plate base material will be in the state which followed the glass ribbon mentioned later when shaping | molding is started. Further, the glass plate base material refers to a raw glass plate base material that has not yet been stretched, and the plate thickness remains the same as the original glass plate base material. Therefore, during stable molding, the glass plate base material is the one that enters the heating device and is sufficiently heated to receive a sufficiently high temperature.

The glass plate base material 1 is preferably made of, for example, a strip-shaped glass thin plate having a thickness of 0.3 mm or less. The glass plate base material 1 is made of a flexible glass strip having a thickness of 0.3 mm or less, such as 0.25 mm, 0.15 mm, or 0.1 mm, and can be rolled, and is cylindrical. The required length is wound around the outer peripheral surface of the drum 3. The winding drum 3 is set in a supply device 5 that can supply the glass plate from which the glass plate base material 1 has been unwound to the heating device 6 at an appropriate speed. Although the length of the glass plate base material 1 can arbitrarily select the diameter of the winding drum 3 and the length that can be wound around it, the glass plate base material 1 having a length of 5 m or more or 10 m or more may be used as an example.
The method for producing the glass plate base material 1 is not particularly limited, and for example, a general production method capable of forming a glass thin plate such as float molding, fusion molding, slit download molding, pulling molding, roll-out molding or the like can be used. . If it is the glass plate base material 1 of the glass thin plate of the above-mentioned thickness shape | molded with these general manufacturing methods, since it can wind around the winding drum 3 easily, according to the outer diameter of the winding drum 3. It is possible to apply a glass plate base material 1 that is orders of magnitude longer than the glass plate base material used by conventional devices.
In addition, if it is the glass plate base material 1 which consists of a glass thin plate obtained by the float glass process, a wide thing can be obtained cheaply and application is easy. Moreover, even if the manufacturing apparatus of this invention is installed in the form which continues to the manufacturing apparatus of a glass plate base material including the float process, and a glass plate molded article is manufactured continuously in the manufacturing process of a glass plate base material, Good.
When the glass plate base material 1 is manufactured by the float process, the thickness is preferably 0.3 mm or less, for example, 0.05 mm or more and 0.3 mm or less because the glass rigidity is lost and the wide strength cannot be maintained if the thickness is too thin. preferable. Further, the thickness of the glass plate base material 1 is more preferably 0.1 mm or more and 0.25 mm or less, and further preferably 0.1 mm or more and 0.2 mm or less. When the thickness exceeds 0.3 mm, it becomes difficult to bend and the production equipment becomes large.
The width of the glass plate base material 1 is preferably 300 mm or more, preferably, for example, 300 mm or more and 4000 mm or less in order to meet the demand for widening the glass product. Further, the width of the glass plate base material 1 is more preferably 450 mm or more and 3000 mm or less, and further preferably 600 mm or more and 2000 mm or less. When the width exceeds 4000 mm, the apparatus becomes large and management of the temperature distribution of the glass, which is important in redraw molding, particularly management in the width direction becomes difficult, making it difficult to produce product glass with a uniform plate thickness.
When the glass plate base material 1 is a roll, as will be described later, if it is short, the production efficiency is lowered. Therefore, it is preferably 2 m to 8000 m, more preferably 10 m to 3000 m, and further preferably 30 m to 500 m preferable. If the length of the roll is too long, the roll tends to be damaged by its own weight when wound on the roll, and handling becomes difficult.
The thickness of the glass plate molded product produced from the glass plate base material 1 is preferably 0.1 mm or less because the glass rigidity is lost and the wide strength cannot be maintained if the glass plate base material is too thin, for example, 0.01 mm or more and 0.1 mm or less are preferable. The thickness of the glass plate molded product is more preferably 0.02 mm or more and 0.08 mm or less, and further preferably 0.02 mm or more and 0.07 mm or less. When the thickness exceeds 0.1 mm, the production efficiency in the redraw molding method is lowered, and the effects of the present invention may not be sufficiently obtained.
The width of the glass plate molded product is preferably 200 mm or more, for example, 200 mm or more and 2000 mm or less, in order to meet the demand for enlargement of thin glass such as displays, lighting, solar cells, and architecture. The width of the glass plate molded product is more preferably 200 mm or more and 1500 mm or less, and further preferably 300 mm or more and 1200 mm or less. When the width exceeds 2000 mm, handling becomes difficult due to thinness.
The length when the glass plate molded product is a roll is not particularly limited. It can be cut to a desired length by a cutting machine and taken out in a roll shape as it is, or can be picked up in a rectangular flat plate shape, so-called single wafer type.

  Moreover, the glass which comprises the glass plate base material 1 of this embodiment is not restrict | limited in particular in composition. Therefore, any of soda lime glass, mixed alkali glass, borosilicate glass, or non-alkali glass may be used. Moreover, the use of the manufactured glass product is not limited to architectural use or vehicle use, and examples include flat panel display use and other various uses. The typical composition of the glass which comprises the glass plate base material 1 is enumerated below.

In the case of soda lime glass used for building or vehicle plate glass, it is expressed in terms of mass percentage on the basis of oxide, SiO ₂ : 65 to 75%, Al ₂ O ₃ : 0 to 3%, CaO: 5 to 5%. _{15%, MgO: 0~15%,} Na 2 O: 10~20%, K 2 O: 0~3%, Li 2 O: 0~5%, Fe 2 O 3: 0~3%, TiO 2: _{0~5%, CeO 2: 0~3%} , BaO: 0~5%, SrO: 0~5%, B 2 O 3: 0~5%, ZnO: 0~5%, ZrO 2: 0~5 %, SnO ₂ : 0 to 3%, SO ₃ : 0 to 0.5%.

In the case of non-alkali glass used for a substrate for a liquid crystal display or an organic EL display, SiO ₂ : 39 to 75%, Al ₂ O ₃ : _{3 to} 27%, B in terms of mass percentage based on oxide. It is preferable to have a composition of ₂ O ₃ : 0 to 20%, MgO: 0 to 13%, CaO: 0 to 17%, SrO: 0 to 20%, BaO: 0 to 30%.

In the case of mixed alkali type glass is used as the substrate for plasma display, as represented by mass percentage based on _{oxides, SiO 2: 50~75%, Al} 2 O 3: 0~15%, MgO + CaO + SrO + BaO + ZnO: 6~24 %, Na ₂ O + K ₂ O: 6 to 24%.
As other applications, in the case of borosilicate glass used for heat-resistant containers or physics and chemistry instruments, etc., it is expressed in terms of mass percentage on the basis of oxide, SiO ₂ : 60 to 85%, Al ₂ O ₃ : 0 to 5% B ₂ O ₃ : 5 to 20%, Na ₂ O + K ₂ O: 2 to 10%.

The heating device 6 is composed of a vertical core tube 6A having a rectangular cross section and a plurality of electric resistance heaters (not shown) provided in the periphery thereof. The heating device 6 is installed substantially vertically below the base material supply device 5 with one opening of the core tube 6A facing upward as the inlet 6B and the other opening facing downward as the outlet 6C. The core tube 6A is formed in such a size that the glass sheet base material 1 unwound downward from the winding drum 3 can be inserted into the core tube inner side from the inlet portion 6B and discharged from the outlet portion 6C.
The heating device 6 is configured to heat the glass ribbon 2A passing through the inside of the core tube 6A by energizing these heaters. A plurality of heaters used in the present embodiment are preferably provided around the core tube 6A, and the glass ribbon 2A that passes through the core tube 6A is required by individually controlling the energization amount to the plurality of heaters. The part can be heated to an appropriate temperature above the softening point.
Here, a strip-shaped glass plate from when the glass plate base material 1 enters the heating device to soften and the plate thickness starts to become thin and before it is molded and cut into a glass plate molded product is referred to as a glass ribbon. Here, the glass plate molded product refers to a glass plate as an intermediate product or a finished product after the glass ribbon has been cut after molding, and in the case of a flat glass plate, it is wound into a roll. In some cases, it may be a rolled glass plate, and may be laminated to a glass plate surface by coating or film in a form that can be transported to the next process or customer process. However, in this case, the stretching ratio is calculated from the thickness of only the glass portion of the glass plate.

  Explaining the principle of redraw molding in chronological order. When the glass plate base material under tension is heated and softened, the plate thickness gradually decreases, and in the process of cooling, the plate thickness stops decreasing and remains constant. Thus, a glass plate molded product can be formed by separating the constant thickness portion. In this case, since the glass plate base material is always tensioned, the plate thickness is reduced at the moment of softening. In the above definition, the glass in that portion is a glass ribbon. Therefore, in time series, the glass plate base material is heated and softened to form, but when explaining the spatial device configuration during stable forming, the glass ribbon is actually heated. become.

The heating device 6 includes a pulling speed (hereinafter referred to as “forming speed”) of the pulling apparatus 8 that pulls the glass ribbon 2 and a speed at which the glass plate base material 1 is supplied to the heating apparatus (hereinafter referred to as “supply speed”). The glass plate base material 1 is softened and stretched to a substantially trapezoidal shape (the lower side is shorter than the upper side) to form a glass ribbon (hereinafter referred to as this approximate base). The extending portion of the shape is referred to as a glass ribbon stretching region 2A.), And a temperature environment is maintained that maintains the softened state of the glass ribbon stretching region 2A.
It is also possible to supply clean air, N ₂ gas, Ar gas, He gas, or a mixed gas thereof inside the furnace tube so that the glass ribbon can be stretched in an environment in which no impurities are mixed from the heating atmosphere.

The slow cooling device 7 has a configuration in which an electrical resistance heater (not shown), a cooling device such as an air cooling tube, a water cooling tube, and the like are built in a vertical rectangular tube wall 7A having a rectangular cross section. The slow cooling device 7 is disposed substantially vertically below the heating device 6 with one opening of the rectangular tube wall 7A facing upward as an inlet portion 7B and the other opening facing downward as an outlet portion 7C. .
The slow cooling device 7 passes the heating device 6 to reduce the width and thickness of the glass ribbon 2B to an arbitrary temperature close to room temperature so as not to break while controlling the residual strain and fictive temperature of the glass. Is arranged. In addition, although the slow cooling apparatus 7 of this embodiment is provided as a separate body with respect to the heating apparatus 6, it is difficult to separate and comprise and it is preferable to set it as the structure integrated with the heating apparatus 6. FIG. This is because it is difficult to substantially separate the heating region and the slow cooling region, and both form a glass temperature gradient integrally.

  The tension device 8 has a structure in which two rolls 12 horizontally supported by a support shaft 11 are arranged adjacent to each other, and the glass ribbon 2 led out from the outlet portion 7C of the slow cooling device 7 is sandwiched between the rolls 12 and 12, respectively. The roll 12 can be rotated. The glass plate base material 1 can be pulled out from the base material supply device 5 by pulling the glass ribbon 2 at an appropriate speed while sandwiching the glass ribbon 2 between these rolls 12 and 12. The tension | pulling apparatus 8 may be installed in the heating apparatus 6, the slow cooling apparatus 7, and multiple may be installed. Moreover, the rolls 12 and 12 may contact the whole surface of the glass ribbon in the width direction, or may contact only a part of the width direction.

The cutting device 9 includes a cutter device capable of forming a scribe line along the width direction of the glass ribbon 2B passing through the inside thereof, and a folding device for cutting the glass ribbon 2 by applying a shearing force along the scribe line. The device is built-in. Since the cutter device and the folding device built in the cutting device 9 are equivalent to a known glass cutting device provided in a general plate glass production line, detailed description thereof is omitted. The cutting device 9 is not limited to the combined structure of the cutter device and the folding device, and any structure such as a cleaving device of a method of cleaving without a scribe line by a laser beam or a device fusing directly with a laser beam. It may be.
The winding roll (winding device) 10 is a device that can wind up the glass ribbon 2 that has passed through the pulling device 8 and the cutting device 9 to a required length.

Next, a method for manufacturing the glass plate molded product 15 from the glass plate base material 1 through the glass ribbon 2 using the glass plate molded product manufacturing apparatus 20 having the above-described configuration will be described.
First, by energizing the heater of the heating device 6, an environment for heating and softening the glass plate base material (at the start of molding) or the glass ribbon supplied into the core 6A is prepared. Moreover, the heating / cooling conditions of the heater and cooling device of the slow cooling device 7 are set, and an environment for gradually cooling the glass ribbon (may be a glass plate base material at the start of molding) is prepared.

The glass plate base material 1 made of a glass plate having a thickness of 0.3 mm or less is wound around the winding drum 3 of the base material supply device 5, and the glass plate base material 2 is moved from the winding drum 3 to an appropriate speed. Then, it is supplied to the heating device 6 and the slow cooling device 7 and is sandwiched between the rolls 12 and 12 and pulled at an appropriate speed or tension.
At the same time as the glass plate base material in the heating device 6 at the start of molding is heated and softened, the glass plate base material 1 forms the glass ribbon stretching region 2A, and the plate thickness starts to decrease.
Thereafter, the supply speed and the molding speed are set to be desired values, and the setting conditions of the heating device 6 and the slow cooling device 7 are also set to the stabilization conditions. In this process, the shape and temperature distribution of the glass ribbon stretching region 2A can be stabilized, and the glass ribbon 2 having a specified width and a specified thickness can be pulled out.
In addition, since the front end side of the glass ribbon which the tension | pulling apparatus 8 pulls at the time of a shaping | molding start has not passed through the extending | stretching process, the width | variety and plate | board thickness are not reduced. Therefore, until the glass ribbon stretching region 2A is stably formed and the stretching process is made stable, the glass ribbon is not wound around the winding device 10, but pulled out from the tensioning device 8 to the side. It is sent to an unillustrated pulverizer or the like as an unnecessary part at the start point, processed into a cullet, etc., and reused.

After the above processing is continued and the temperature distribution when the glass ribbon is heated is stabilized and the glass ribbon 2 having the specified thickness and the specified width is drawn from the glass ribbon stretching region 2A, the glass ribbon 2 is cut. 9 side, it passes the cutting device 9, and winds up to the winding roll 10. FIG. When the above-described processing is continued and a sufficient amount of the glass ribbon 2 is taken up on the take-up roll 10, the cutting device 9 is operated to cut the glass ribbon 2. Thereby, the glass roll 15 which is the glass plate molded article which wound the glass ribbon 2 around the winding roll 10 in roll shape can be obtained.
Thereafter, the take-up roll 10 around which the glass ribbon 2 is wound is replaced with another empty take-up roll 10, and the newly produced glass ribbon 2 is wound around and accommodated in the empty take-up roll 10 and rolled. Since the glass roll 15 provided with the glass ribbon 2B in a state can be obtained, the glass roll 15 can be repeatedly produced until the supply of the glass plate base material 2 to the heating device 6 is completed.

  In addition, although the manufacturing apparatus 20 of the glass plate molded article of the structure shown in FIG. 1 in this embodiment was used in order to roll the glass ribbon 2 around the winding roll 10, and to manufacture the glass roll 15, glass roll 15 Is not constrained to the form of manufacturing only. For example, by using the glass plate molded product manufacturing apparatus 20, the glass ribbon 2 is taken up by the cutting device 9 without winding the glass ribbon 2 around the take-up roll 10 as shown by a two-dot chain line in FIG. By cutting it into lengths, it can be used as an application for producing a rectangular flat plate, that is, a so-called single-wafer type glass thin plate 16.

Consideration regarding the material viewpoint (hereinafter referred to as “material productivity”) of the productivity of the glass sheet molded product in the present embodiment is performed in comparison with the conventional example using the draw ratio α as a parameter.
First, the material productivity in the conventional example shown in FIG. 5 will be examined. The material productivity that much from one glass plate base material glass plate molded article is used as an index if it can produce beta, the total area of the area A ₀ and the all-glass molded article before molding the glass plate preform When defined as the ratio of A, it is expressed by the following equation.
β = A / A ₀ ... (1)
Here, _A0 is the area before molding of the glass plate base material, and A is the total area of all glass molded products. The larger the value of β, the higher the material productivity.
The thickness of the glass plate base material is t ₀ , the thickness of the glass molded product is t, the width of the glass plate base material is w ₀ , the width of the glass molded product is w, the length of the glass plate base material is L ₀ , all When the total length of the glass molded product is L, A ₀ and A are expressed by the following equations.
A ₀ = L ₀ × w ₀ (2)
A = L × w (3)

The supply rate of the glass plate base material during stable forming is V ₀ and the forming rate of the glass ribbon is V. Since the stretch ratio α is the ratio of the thickness of the glass plate base material to the glass molded product, it is expressed by the following equation.
α = t ₀ / t (4)
Further, the following equation holds from the principle of redraw molding.
α ≒ w ₀ / w (5)
Furthermore, during stable forming, the volume of the glass plate base material supplied per unit time is equal to the total volume of the glass plate molded product produced per unit time. Therefore, the following condition is satisfied.
t ₀ × w ₀ × V ₀ = t × w × V (6)
As described above, L ₁ portion of 5 at the beginning and completion of molding the molding can not be glass molded article as a product. This corresponds to the waste of the part that is wasted in the initial stage of production on the front end side of the glass plate base material and the part that the gripping device grips on the rear end side of the glass plate base material. For this reason, the maximum value L ₀₁ of the net glass plate base material that can be used effectively without becoming invalid at the start of molding is expressed by the following equation.
L ₀₁ = L ₀ −L ₁ (7)
Thus, the maximum area A ₁ which can be a glass ribbon is expressed by the following equation.
A ₁ = α × L ₀₁ (8)
Moreover, since the length of the part which can become a glass plate molded product at the end of molding among the portions that have become glass ribbons is equal to the maximum value of the total length of all glass plate molded products, it can be assumed by the following equation.
_{L = A 1 / w-L} 1 ... (9)
From this equation, the total area A of all glass molded products can be expressed by the following equation.
A = A ₁ −L ₁ × w (10)
From the above relational expression, β can be expressed by the following expression.
β = α (1-L ₁ / L ₀ ) −L ₁ / (α × L ₀ ) (11)

Therefore, methods for improving the material productivity β include increasing the stretching ratio α, decreasing the minimum length L ₁ that cannot be effectively formed, and increasing the length L ₀ of the glass plate base material. There will be two ways. However, a method of reducing the minimum length L ₁ can not be effectively molded, will be reduced as much as possible the length direction with a heating device 103 and the slow cooling device 105 in the embodiment of FIG. 5, rapid heating apparatus of rapid cooling Therefore, quality resulting from redraw molding is also reduced. Therefore, the implementation is limited. Further, a method of increasing the length L ₀ of the other glass plate preform is to maximize the size of the glass plate base material supply part, it will be a very high level of production equipment Inefficient. Also, it is difficult to transport, transport and handle such glass plate base materials. The length L ₀ of the glass plate base material is actually 3 m, and the minimum length L ₁ that cannot be effectively formed may be ₁ m. The method proposed in Patent Document 2 is an alternative method for increasing the size of the glass plate base material supply portion. However, as described above, the glass plate molded product has a quality problem.

For this reason, the prior art has been developed with the aim of using as high a draw ratio α as possible in order to improve the material productivity β.
On the other hand, according to the present invention, it is possible to produce a high-quality wide glass ultra-thin plate molded product by providing a manufacturing method having a small draw ratio α in accordance with the demand for a wide glass ultra-thin plate molded product.
The width w ₀ of the glass plate base material 1 is represented by the following expression, where w is the width of the desired glass plate molded product.
w ₀ ≈α × w (12)
That is, since the width of the glass plate base material 1 determines the size in the width direction of the manufacturing apparatus, the fact that the drawing rate is small relative to the required width w of the glass plate molded product can be produced by a manufacturing apparatus with a small width. Means. In order to obtain high-quality glass molded products in redraw molding, it is important to control the temperature distribution in the width direction and the movement of the glass ribbon and the tensile force. It leads to the production of glass. In addition, a manufacturing apparatus with a small width can realize cost reduction.

In the method of forming the glass ribbon 2 by the glass plate molded product manufacturing apparatus 20 having the structure shown in FIG. 1 and manufacturing the glass plate molded product, to apply the previous consideration, the roll-shaped glass plate base material is extended. This is equivalent to the case where a single flat glass plate preform is supplied, and is equivalent to the case where a roll-shaped glass plate molded product is extended to obtain a single flat glass plate molded product.
In other words, setting the stretching ratio α small means that the material productivity is small. The present invention also provides a method of increasing the glass plate base material length L in order to obtain the maximum material productivity. In the present invention, since the stretch ratio α is small, when manufacturing an ultrathin glass sheet having a thickness of 0.1 mm or less, the thickness of the glass sheet base material can be 0.3 mm or less. A glass plate of 0.3 mm or less is flexible and can be easily wound into a roll. Therefore, a redraw molding method using a roll-shaped glass plate base material that could not be performed by the prior art can be performed. And it becomes possible to lengthen the glass plate base material length L greatly compared with the past.

In addition, productivity is not limited to materials. The time productivity (hereinafter referred to as “time productivity”) of how many glass sheet molded products can be produced per unit time is also a major issue. In redraw molding by the conventional method, continuous supply of glass plate base material is practically impossible, so the time to replace the glass plate base material in addition to pure production time, stable molding conditions that make the glass plate molded product a good product Time required for stabilization until this occurs, and time productivity is lowered. In the conventional embodiment shown in FIG. 5, this exchange time and stabilization time frequently occur, and it is difficult to improve temporal productivity.
On the other hand, in the manufacturing method in which the stretch ratio α is set small as in the present invention, a roll-shaped glass plate base material can be used, so that the time productivity is dramatically improved.
Use of the roll-shaped glass plate base material, that is, in very large manufacturing conditions L _0, whereas conventional development of possible configuration of a manufacturing apparatus to shorten the L ₁ was desired, be slightly longer L ₁ Accordingly, it is possible to improve the quality of a glass molded product, for example, to manufacture a glass plate molded product having a low compaction value with a reduced virtual temperature without greatly affecting the productivity.

From the background as described above, when molding is performed using the glass sheet molded product manufacturing apparatus 20 of the present embodiment, the molding is performed by setting the stretching ratio to be smaller than the stretching ratio set in the conventional redraw molding apparatus. Do. Specifically, the stretching ratio is 1.5 or more and less than 10, preferably 1.5 or more and 7 or less, more preferably 1.5 or more and 5 or less, and further preferably 1.5 or more and 4 or less. Thus, it can be produced without making the device larger than necessary.
If the stretching ratio is less than 1.5, the stretching ratio becomes too low, which makes practically meaningless. In addition, when the stretching ratio exceeds 5, the effect of the present invention that can produce a glass sheet molded product having a wide required width is obtained, but the width of the glass sheet base material is smaller than that when the stretching ratio is 5 or less. There are cases where the size becomes larger and the operability becomes worse, and the manufacturing equipment becomes larger. For this reason, the draw ratio of 5 or less is a more preferable range.

  Table 1 below shows the relationship between the thickness (mm) and width (m) of the glass plate base material 1 when the draw ratio α is 5 or less, and the thickness (mm) and width (m) of the glass plate molded product. Show.

As shown in Table 1, if the draw ratio α is 5 or less, the width of the glass plate molded product obtained is 0.2 to 0 even if the plate width of the glass plate base material 1 is set to be less than 2 m. .6 m (200 mm to 600 mm). Furthermore, by using the glass plate base material 1 made of a glass thin plate, a glass plate molded product having a plate thickness of 0.03 mm to 0.1 mm can be manufactured.
In addition, if it is a glass plate molded product obtained by the molding method of the present invention, the so-called redraw molding method can inherit the effect of obtaining an excellent flatness glass ribbon as it is originally shown. A high-quality glass plate molded product with high flatness can be obtained.
Therefore, by the above-described forming method using the glass plate molded product manufacturing apparatus 20 of the present embodiment, a glass ribbon molded product having a high surface flatness and a wide glass ribbon and a glass plate molded product is required. It can be manufactured without increasing the size.

In addition, in the manufacturing apparatus 20 of the glass plate molded product of the embodiment shown in FIG. 1, the winding roll 10 is provided after the cutting apparatus 9 and the glass ribbon 2 is wound up as a long roll, The glass ribbon 2 can be obtained as a flat so-called single-wafer glass plate without being wound on the take-up roll 10 while being cut to a required length.
Further, the glass sheet molded product manufacturing apparatus 20 is not limited to a vertical structure as shown in FIG. 1, and as long as the glass ribbon stretching region 2 </ b> A can be maintained, the base material supply apparatus 5, the heating apparatus 6, and the slow cooling apparatus. 7 and the tensioning device 8 may be inclined or horizontally arranged.

FIG. 2 shows a second embodiment of the glass plate molded product manufacturing apparatus according to the present invention. The glass plate of the first embodiment described above in the glass plate molded product manufacturing apparatus 30 of the second embodiment. The same elements as those of the molded product manufacturing apparatus 20 are denoted by the same reference numerals, and detailed description thereof is omitted.
The glass sheet molded product manufacturing apparatus 30 of the present embodiment is different from the glass plate molded product manufacturing apparatus 20 in that the glass ribbon end cutting device (the second cutting device 9) is interposed between the tensioning device 8 and the cutting device 9. Cutting device) 22 and 22 are provided.

  The glass ribbon end cutting device 22 includes a scribing line forming device such as a cutter device and a folding device, and is predetermined from the edge of the glass ribbon 2 along the length direction of the glass ribbon 2 passing through the inside. A cutter device that can continuously form a scribe line at a distance apart, and a folding device such as a roller device that cleaves the edge side of the glass ribbon 2 by applying a shearing force along the scribe line are incorporated. Since the cutter device and the folding device built in the cutting device 9 are equivalent to a known glass ribbon end cutting device provided in a general glass plate production line, detailed description thereof is omitted. . As an example of a folding device, a plurality of roller devices are installed on both sides of the scribe line so as to sandwich the front and back surfaces of the glass ribbon 2, and a shearing force is applied to the glass ribbon 2 with these roller devices along the scribe line. An apparatus for folding both ends of the glass ribbon 2 can be mentioned. Note that the glass ribbon end cutting device 22 is not limited to the combined structure of the cutter device and the folding device, but is a cutting device that uses a laser beam to cut without forming a scribe line, or a direct cutting with a laser beam. The cutting device may be of any structure, such as a device to perform.

The glass sheet molded product manufacturing apparatus 30 having the above configuration sends the glass plate base material 1 from the base material supply apparatus 5 to the heating apparatus 6 in the same manner as the glass plate molded product manufacturing apparatus 20 of the first embodiment, and is softened. And pulling to form the glass ribbon stretching region 2A, producing the glass ribbon 2, and winding the glass ribbon 2 on the take-up roll 10 side is the same structure.
After glass plate base material 1 is made into glass ribbon 2 in glass plate molded product manufacturing apparatus 30 and passed through tension device 8, both ends of the glass ribbon are cut over a predetermined width by glass ribbon end cutting device 22, The outside of the cut portion is separated from the central glass ribbon 2E on the center side as an end 2D. Only this center side glass ribbon 2E is wound around the winding roll 10, wound into a roll shape, and accommodated in the winding roll 10. When the center side glass ribbon 2E wound around the take-up roll 10 has reached the required amount, the cutting device 9 cuts in the width direction of the center side glass ribbon 2E, thereby winding it into a roll shape excluding the end 2D. The center side glass ribbon 2E can be obtained.
Since the center side glass ribbon 2E separates and removes the end portion 2D which is likely to cause unevenness and uneven thickness, the widthwise end edges are smooth and free of unevenness, and the flatness obtained by the redraw molding method A high-quality central glass ribbon having a high degree of surface roughness can be obtained. Moreover, the glass roll 18 which is a glass plate molded article formed by winding the center side glass ribbon 2E around the winding roll 10 in a roll shape can be obtained.
In this embodiment, since the end 2D to be removed exists, it is desirable to use a method in which the rollers 12 and 12 of the tensioning device 8 contact only the end 2D in order to pull the glass ribbon 2. This is for avoiding deterioration of the quality of the glass ribbon due to the contact between the rolls 12 and 12.

  Moreover, the manufacturing method of the form which does not cut | disconnect the edge part of a glass ribbon, when the edge part of a glass ribbon is requested | required without worrying about the quality of the edge part of a glass ribbon, is preferable. This is because when the end portion is not cut, the end portion becomes a fire-formed surface after heat forming.

  FIG. 3 shows a third embodiment of the glass plate molded product manufacturing apparatus according to the present invention. The glass plate of the second embodiment described above in the glass plate molded product manufacturing apparatus 50 of the third embodiment. The same elements as those of the molded product manufacturing apparatus 30 are denoted by the same reference numerals, and detailed description thereof will be omitted.

  The glass plate molded product manufacturing apparatus 50 of the present embodiment differs from the glass plate molded product manufacturing apparatus 30 in that the supply device 5 is rolled between the base material supply device 5 and the heating device 6. A glass ribbon that is fed from a rolled glass sheet base material 1, and the tension of the glass sheet base material 1 that has been unwound between the supply device 5 and the heating device 6 is applied by a tension device 8. And a winding device (winding roll 10) for winding the glass ribbon between the cutting device 9 and the winding roll 10 as a roll-shaped glass sheet molded product. The difference is that there is means 23 for adjusting the tension of the glass ribbon 2E independently of the tension of the glass ribbon by the tension device 8 on the first cutting device 9 side of the winding device. Here, the former means 21 is called the first tension cut mechanism 21 and the latter means 23 is called the second tension cut mechanism 23.

The first tension cut mechanism 21 includes a pair of first tension rolls 25 and 25 arranged adjacent to each other, and a pair of second tension rolls 26 and 26 arranged adjacent to each other.
The first tension rolls 25, 25 are respectively supported horizontally by a support shaft 27 and are disposed between the base material supply device 5 and the heating device 6, and the second tension rolls 26, 26 are horizontally supported by a support shaft 28. And is disposed between the first tension rolls 25, 25 and the heating device 6. With these configurations, the glass plate base material 1 fed from the base material supply device 5 first passes between the first tension rolls 25 and 25 while being sandwiched between the first tension rolls 25 and 25, and then the second tension roll 26 and After passing between them while being sandwiched by 26, it is supplied to the heating device 6.

The second tension cut mechanism 23 includes third tension rolls 40 and 40 that are disposed adjacent to each other and fourth tension rolls 31 and 31 that are disposed adjacent to each other.
The third tension rolls 30 and 30 are respectively supported horizontally by the support shaft 32 and are disposed between the cutting device 9 and the take-up roll 10, and the fourth tension rolls 31 and 31 are horizontally supported by the support shaft 33. Supported and disposed between the third tension rolls 40, 40 and the take-up roll 10. With these configurations, the glass ribbon 2E that has passed through the cutting device 9 first passes between the third tension rolls 40 and 40 while being sandwiched between the third tension rolls 40 and 40, and then is sandwiched between the fourth tension rolls 31 and 31. After passing between them, it is comprised so that the winding roll 10 may be reached.

The glass plate molded product manufacturing apparatus 50 according to this embodiment includes a glass plate base material 1 while the glass plate base material 1 is moving between the first tension rolls 25 and 25 and the second tension rolls 26 and 26. The normal tension can be applied to the glass plate base material 1 that passes through the portion from the second tension rolls 26, 26 to the heating device 6 even if the tension of the glass plate becomes somewhat loose from the normal value.
For example, when the glass plate base material 1 is sent from the base material supply device 5 to the heating device side at a speed higher than necessary, if the tension of the glass ribbon is loosened inside the heating device 6, the inside of the heating device 6 On the side, the molding state of the glass ribbon stretching region 2A is affected, and the molding cannot be performed at the target stretching rate. On the other hand, if the tension cut mechanism 21 is provided in front of the heating device 6, even if the supply amount of the glass plate base material 1 from the base material supply device 5 increases, the first tension roll 25 and the second tension roll 25 Since the glass plate base material 1 exists in a relaxed state with the tension roll 26, the supply state of the glass plate base material 1 supplied to the heating device 6 can be stabilized, and the glass ribbon Stabilization of the heated state and the stretched state can be achieved.

In the glass plate molded product manufacturing apparatus 50 according to the present embodiment, the glass ribbon 2E is moving between the third tension rolls 40, 40 and the fourth tension rolls 31, 31, and the tension of the glass ribbon 2E is normal. Even if it becomes somewhat loose from the value, normal tension can be applied to the glass ribbon 2E passing through the portion from the fourth tension rolls 31, 31 to the take-up roll 10.
By providing the tension cut mechanism 23 in the front stage of the take-up roll 10 as the glass plate molded product manufacturing apparatus 50, the state of the glass ribbon 2E pulled from the heating device 6 side to the take-up roll 10 side can be stabilized. The stretched state of the glass ribbon 2E and stabilization at the time of winding the roll on the winding roll 10 can be achieved. Further, since the glass ribbon 2E can be wound around the winding roll 10 with an accurate tension, the glass ribbon 2E can be accurately wound around the winding roll 10 without being displaced.

As described above, while the glass ribbon 2 passes through the pulling device 8 and is wound around the take-up roll 10, the moving speed of the glass ribbon 2 passing through the pulling device 8 and the take-up roll 10 winds the glass ribbon 2E. Even if a difference between the speed and the tension occurs, the tension cut mechanism 23 absorbs the difference, so that the state of the glass ribbon stretching region 2A generated inside the heating device 6 is stabilized and the stretching ratio is increased. Fluctuation can be suppressed. Thus, even if it exists in the manufacturing apparatus 50 of the glass plate molded product of this embodiment, the glass roll 51 formed by winding the roll-shaped center side glass ribbon 2E around the winding roll 10 can be obtained.
In addition to the above embodiment, various tension cut mechanisms used in web (WEB) handling technology, which is a transport technology including winding and unwinding of plastic film, paper, cloth, etc., are used, and the inside of the heating device 6 It is also possible to control the tension of the glass ribbon 2A, the tension of unwinding the roll-shaped glass plate base material 1, and the tension of winding the glass ribbon into a roll.

FIG. 4 shows a fourth embodiment of the glass plate molded product manufacturing apparatus according to the present invention. The glass plate of the first embodiment described above in the glass plate molded product manufacturing apparatus 60 of the fourth embodiment. The same elements as those of the molded product manufacturing apparatus 20 are denoted by the same reference numerals, and detailed description thereof will be omitted.
The glass plate molded product manufacturing apparatus 60 of the present embodiment is different from the glass plate molded product manufacturing apparatus 20 in that a conveying roll 70 such as a bending roll is provided between the base material supply device 5 and the heating device 6. Is different, and the configuration in which the inspection device 52 and the film feeder 53 are provided between the slow cooling device 7 and the tension device 8 is different. Also, the configuration is different in that a plurality of tensioning devices 8 are provided.

  The glass plate molded product manufacturing apparatus 60 having the configuration shown in FIG. 4 heats the thin glass plate base material 1 from the base material supply device 5 in the same manner as the glass plate molded product manufacturing apparatus 20 of the first embodiment. It is the same structure about the structure which can be sent to the apparatus 6, and can form the glass ribbon extending | stretching area | region by softening and pulling a glass ribbon to make the glass ribbon 2, and can wind up the glass ribbon 2 to the winding roll 10 side. .

In the glass sheet molded product manufacturing apparatus 60 according to the present embodiment, the glass ribbon 2B that has passed through the slow cooling apparatus 7 is inspected by the inspection apparatus 52 for appearance defects, sheet thickness distribution, sheet width, and the like, and then the reel member 55. A film can be supplied to the surface of the glass ribbon 2 from a film feeder 53 formed by winding a resin film 56 around the glass ribbon 2.
The position where the film 56 is supplied from the film supply machine 53 to both surfaces of the glass ribbon 2 is set immediately before the tensioning device 8. When the film 56 is supplied to both surfaces of the glass ribbon 2, these are sandwiched and pressed between the rolls 12 and 12 of the tension device 8, so that a composite glass ribbon 57 in which the film 56 is adhered to both surfaces of the glass ribbon 2 is obtained. It has become.
In the glass plate molded product manufacturing apparatus 60 according to the present embodiment, the composite glass ribbon 57 can be wound and accommodated in the take-up roll 10, so that the composite glass ribbon 57 in a rolled state can be obtained. Moreover, the glass roll 58 as a glass plate molded product which winds the composite glass ribbon 57 in roll shape around the winding roll 10 can be obtained.

Although the invention has been described in detail and with reference to specific embodiments, it will be apparent to those skilled in the art that various changes and modifications can be made without departing from the spirit and scope of the invention.
This application is based on Japanese Patent Application No. 2010-278577 filed on Dec. 14, 2010, the contents of which are incorporated herein by reference.

  The technology of the present invention can be widely applied to the production of architectural glass, vehicle glass, optical glass, medical glass, display device glass, and other general glass products.

  DESCRIPTION OF SYMBOLS 1 ... Glass plate base material, 20, 30, 50, 60 ... Manufacturing apparatus of glass plate molded article, 2A ... Glass ribbon extending | stretching area | region, 2B ... Glass ribbon, 2D ... Glass ribbon edge part, 2E ... Center side glass ribbon, 3 DESCRIPTION OF SYMBOLS ... Winding drum, 5 ... Base material supply device, 6 ... Heating device, 7 ... Slow cooling device, 8 ... Tensioning device, 9 ... Cutting device (first cutting device), 10 ... Winding roll, 12 ... Roll, 15 , 18 ... glass roll, 16 ... glass thin plate, 21 ... first tension cut mechanism, 22 ... glass ribbon end cutting device (second cutting device), 23 ... second tension cut mechanism, 25 ... first Tension roll, 26 ... second tension roll, 31 ... fourth tension roll, 40 ... third tension roll, 51 ... glass roll, 52 ... inspection apparatus, 53 ... film feeder, 56 ... resin film, 57 ... If the glass ribbon, 58 ... glass roll, 70 ... transport roll

Claims (15)

A glass plate molded product by softening a glass plate base material and forming a glass ribbon by drawing a glass ribbon having a narrower plate width and a thinner plate thickness than the glass plate base material, and cutting the glass ribbon in its width direction Cutting step
The manufacturing method of the glass plate molded product whose stretch rate represented by the ratio of the plate | board thickness of the said glass plate base material and the plate | board thickness of the said glass plate molded product is 1.5-10.   The manufacturing method according to claim 1, wherein a thickness of the glass plate base material is 0.3 mm or less.   The manufacturing method according to claim 1 or 2, wherein a plate width of the glass plate molded product is 200 mm or more.   The manufacturing method according to any one of claims 1 to 3, wherein a plate width of the glass plate base material is 300 mm or more.   The manufacturing method as described in any one of Claims 1-4 whose plate | board thickness of the said glass plate molded product is 0.1 mm or less.   The said glass plate base material is a roll-shaped glass plate base material wound up by the roll, and sheet-like glass is unwound from this roll-shaped glass plate base material, and is softened. The manufacturing method as described in.   The manufacturing method according to any one of claims 1 to 6, wherein the glass ribbon is wound on a roll to become a roll-shaped glass sheet molded product.   The manufacturing method as described in any one of Claims 1-7 which has the process of cut | disconnecting the width direction edge part of a glass ribbon along the length direction of this glass ribbon between the said extending process and the said cutting process.   The manufacturing method as described in any one of Claims 1-7 which does not include the process of cut | disconnecting the width direction edge part of a glass ribbon along the length direction of this glass ribbon between the said extending process and the said cutting process. . A glass plate base material supply device;
A heating device that heat-softens the glass plate base material supplied from the supply device to form a glass ribbon;
A tensioning device for pulling the glass ribbon;
A first cutting device that cuts the glass ribbon after the tension to form a glass plate molded article;
The Bei example, a glass plate molded article according to any one of claims 1 to 9 is a device for supplying said supply device of the glass plate base material unwound from a roll-like glass plate base material which is rolled Glass plate molded product manufacturing apparatus for the manufacturing method of the present invention. A winding device for winding the glass ribbon as a roll-shaped glass plate molded product is provided, and the tension of the glass ribbon is adjusted independently of the tension of the glass ribbon by the tension device on the first cutting device side of the winding device. The manufacturing apparatus according to claim 10, wherein means for performing the processing is provided. The manufacturing apparatus according to claim 10 or 11 , wherein means for adjusting the tension of the unwound glass sheet base material independently of the tension of the glass ribbon by the tensioning device is provided between the supply device and the heating device. . A glass plate base material supply device;
A heating device that heat-softens the glass plate base material supplied from the supply device to form a glass ribbon;
A tensioning device for pulling the glass ribbon;
A first cutting device that cuts the glass ribbon after the tension to form a glass plate molded article;
A winding device for winding the glass ribbon as a roll-shaped glass plate molded product is provided, and the tension of the glass ribbon is adjusted independently of the tension of the glass ribbon by the tension device on the first cutting device side of the winding device. The manufacturing apparatus of the glass plate molded product for the manufacturing method of the glass plate molded product as described in any one of Claims 1-9 provided with the means to do. The manufacturing method according to any one of claims 10 to 13 , further comprising a second cutting device provided between the pulling device and the first cutting device to remove both ends in the width direction of the glass ribbon. apparatus.   The manufacturing apparatus as described in any one of Claims 10-14 with which the slow cooling apparatus which annealed the glass ribbon provided between the said heating apparatus and the said tension | pulling apparatus and heat-softened was comprised.

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