JP2008105876A - Method of manufacturing glass molding, control program for executing method of manufacturing glass molding by computor, and storage medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method of manufacturing a glass molding by which devitrification and striae can be suppressed by controlling the temperature and the viscosity of molten glass when molding the molten glass. <P>SOLUTION: In the method of manufacturing the glass molding by which glass is continuously molded by continuously making the molten glass flow down from a flow-out port to one end part of a mold having a prescribed width and drawing out the molten glass from another end of the moldie, the molten glass is controlled so that its temperature is the devitrification temperature or below and is controlled to the tempeture that the viscosity logη of the molten glass is ≤2.0 in one end, and is controlled to keep the softening temperatureor above in another end, thereby manufacturing the glass molding suppressive in devitrification and striae. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method for manufacturing a glass molded body such as a plate glass that forms molten glass by adjusting the temperature and viscosity of the molten glass, a control program for causing a computer to execute the manufacturing method, and a storage medium.

  Usually, when molten glass is continuously formed into a plate shape or rod shape, a method (multi-roll method) in which the molten glass is flowed between forming rolls and the formed glass is sent out at the same speed as its peripheral speed or a previously prepared forming die A method is known in which molten glass is drawn to one end of the glass and drawn glass is drawn in accordance with the drawing speed.

  For example, in Patent Document 1, molten glass is guided to the vicinity of a molding die with a pipe, and the molten glass is poured into one end of the molding die as close as possible to the distance between the molten glass outlet and the casting surface. It describes a method for continuously drawing glass while it is fixed. The mold is temperature-adjusted in consideration of fusion with the glass, elongation of the formed glass skin, cracks due to cooling, etc. This temperature adjustment is a one-sided cooling of the entire mold. Performed by cooling operation.

Patent Document 2 describes that in the method described in Patent Document 1, a weir is provided at the back position of the outflow pipe in the mold, and high-frequency vibration is applied to the weir to continuously mold the molten glass. ing.
Japanese Patent Publication No. 45-19987 JP-A-50-51516

  However, in these methods using a mold, it is difficult to adjust the molding temperature and molding time, so the temperature distribution of the molten glass located near the surface of the molten glass and the side of the mold and the thermal history associated therewith are uniform. It was difficult to do. As a result, it has been difficult to appropriately form the desired shape required for the mold while suppressing defects such as devitrification and striae.

  Therefore, in a method of forming glass while continuously flowing molten glass into a forming mold, glass having a uniform thermal history, little internal distortion, etc., no phase separation, and easily forming a desired shape There is a need for a method for producing a molded body.

  The present invention has been made in order to solve the above-described problems. By measuring the temperature of the molten glass at the time of forming the molten glass and adjusting the viscosity based on the result, the heat history of the glass is measured. It aims at providing the manufacturing method etc. of the glass molded object which improves uniformity and suppresses devitrification, striae, etc.

  As a result of intensive studies to solve the above problems, the present inventors have rigorously set the quenching condition at one end near the outflow part of the molten glass of the mold and the temperature holding condition at the center part and the other end part. It has been found that the glass can be molded into a desired shape that does not cause defects such as devitrification and striae and that sufficiently reflects the shape of the molding part of the mold. More specifically, the present invention provides the following.

  (1) The glass is continuously formed by drawing the molten glass from the other end of the mold while continuously flowing the molten glass from the outlet to one end of the mold having a predetermined width. In the method for producing a glass molded body, at the one end, the temperature of the molten glass is not higher than the devitrification disappearance temperature, and the logarithmic log η of the viscosity η (dPa · s) of the molten glass is 2.0 or less. The glass molding is produced by cooling to a temperature within a certain range, and maintaining the temperature of the molten glass above the softening point on the mold.

  According to the method for producing a glass molded body in the invention of (1), when the molten glass that has flowed out flows down from the outlet to one end and draws out the molten glass from the other end, it easily occurs without causing devitrification. Can be molded.

  In this specification, the “devitrification disappearance temperature” means that the molten glass in a molten state is cooled (rapidly cooled) to a predetermined temperature at 0.1 to 0.5 ° C./sec, and then at the predetermined temperature. It means the lower limit of the temperature at which devitrification occurs when held for 30 minutes. That is, if the glass is cooled (rapidly cooled) to a temperature lower than the “devitrification disappearance temperature”, the glass does not devitrify even if it is held for a certain time. Depending on the molten glass to be melted, there is an extremely stable glass that does not cause devitrification even if it is cooled to any temperature and held. The essential meaning of “devitrification loss temperature” is a temperature that guarantees that devitrification does not occur even if it is molded at or below that temperature in the glass forming process. There is no need to define the “transmission temperature”. Therefore, for convenience of description, in such a case, even if the molding is performed at an arbitrary temperature, it is included in the molding below the “devitrification loss temperature”.

  In the present specification, the “one end portion of the mold” means a portion where the molten glass flows down in the mold, and specifically shows the vicinity of (A) in FIG. 1. Further, in this specification, “the other end portion of the mold” means an end opposite to the one end portion in the mold, and specifically indicates the vicinity of (C) in FIG. 1. That is, the molten glass flows out at one end and is drawn out from the other end.

  The reason why the holding temperature is set to the “softening point” or more is that when the molten glass falls below the softening point, the molding becomes difficult and it becomes difficult to faithfully reproduce the shape of the molding part of the mold.

  (2) The method for producing a glass molded body according to (1), wherein the molten glass is rapidly cooled by a cooling means included in the mold at the one end from the outlet from which the molten glass flows down.

  According to the method for producing a glass molded body in the invention of (2), the cooling means can effectively cool the molten glass immediately after flowing out to the desired temperature and viscosity through the mold.

  (3) The manufacturing method of the glass molded body of (1)-(2) in which the said molten glass is hold | maintained in the temperature range below a de-dialysis temperature below a softening point in the center part and other end part of the said shaping | molding die.

  According to the method for producing a glass molded body in the invention of (3), molding can be easily performed while preventing devitrification from occurring in the glass molded body even at one end portion (central portion and the other end portion). it can.

  In the present specification, the “center portion of the mold” refers to the vicinity of an intermediate portion between the one end and the other end, and when the mold is viewed in the glass drawing direction, This means a part located approximately in the middle of the other end, and specifically shows the vicinity of (B) in FIG.

In the present specification, the “dialysis exit temperature” means that a glass piece at room temperature (about 3 mm square) is heated to a predetermined temperature at 5.0 × 10 ^{−3 to} 40.0 × 10 ⁻³ ° C./sec. The lower limit of the temperature at which devitrification occurs when held at that temperature for 30 minutes. That is, even when the temperature of the solid glass is raised and kept, devitrification does not occur as long as it is equal to or lower than the “dialysis-out temperature”. The cooling rate of the devitrification disappearance temperature and the dedialysis temperature is different from the cooling rate in actual optical glass molding.

  (4) Production of a glass molded body according to (1) to (3), wherein the molten glass is maintained in a temperature range not lower than the softening point and not higher than the undialysis temperature by heating at least one side surface or bottom surface of the mold. Method.

  According to the method for producing a glass molded body in the invention of (4), by heating the side surface or the bottom surface, the temperature of which is relatively low during molten glass molding, a rapid temperature drop is prevented, and a glass molded body is obtained as desired. Can be easily maintained at a range of temperatures.

(5) The cooling rate of the molten glass at one end of the mold is 0.1 to 0.5 ° C./sec, and the cooling rate of the molten glass is 5 from the center to the other end of the mold. method for producing a glass shaped material from the .0 is a ^{× 10 -3 ~40.0 × 10 -3 ℃} / sec (1) (4).

  According to the method for producing a glass molded body in the invention of (5), since cooling is performed at an appropriate cooling rate, the glass molded body is effectively produced while preventing devitrification and striae of the glass molded body. Can do.

  (6) The method for producing a glass molded body according to any one of (1) to (5), wherein the logarithm log η of the viscosity η (dPa · s) of the molten glass is adjusted by adjusting the temperature of the molten glass.

  (7) Manufacturing the glass molded body of (1) to (6), wherein the mold is cooled and heated so that the temperature of the molten glass at the one end and the other end becomes a preset temperature, respectively. Method.

  According to the method for producing a glass molded body in the inventions of (6) and (7), in order to adjust the logarithmic log η of the viscosity η (dPa · s) of the molten glass, the temperature of the molten glass is measured, or the mold By measuring and controlling the temperature of the molten glass indirectly, it becomes easy to maintain the molten glass in a desired viscosity range.

  (8) The method for producing a glass molded body according to (7), wherein a first temperature detection unit is provided on a side surface of the mold, and the temperature of the molten glass side surface is measured by the first temperature detection unit.

  (9) Further, a second temperature detecting means is provided above, on the back, side or bottom of the one end of the mold, and the temperature around one end of the molten glass is measured by the second temperature detecting means. A method for producing a glass molded body.

  According to the method for producing a glass molded body in the inventions of (8) and (9), the temperature of the molten glass can be accurately known by providing the mold with a temperature detecting means, and the temperature and viscosity of the molten glass are appropriately determined. Can be adjusted.

  (10) Based on the molten glass temperature detected by the first temperature detecting means and the second temperature detecting means, the drawing speed of the molten glass, the cooling speed at the one end where the molten glass flows down, the molding The manufacturing method of the glass molded object as described in (8) or (9) which adjusts the heating intensity of a mold side surface so that change is possible continuously or intermittently.

  According to the method for producing a glass molded body in the invention of (10), the temperature detected by the temperature detecting means is fed back and reflected in the temperature control, thereby minimizing the occurrence of defective products having striae and devitrification. It becomes possible to suppress.

  (11) A control program for causing a computer to execute the glass molded body manufacturing method according to any one of (1) to (10).

  In the control program to be executed by the computer in the invention of (11), a preprogrammed code may be read and executed.

  (12) A storage medium storing a control program for causing a computer to execute the glass molded body manufacturing method according to any one of (1) to (10).

  In the storage medium storing the control program according to the invention of (12), a preprogrammed code may be read and executed.

  According to the present invention, by adjusting the logarithm log η of the temperature and viscosity η (dPa · s) of the molten glass in the mold, it is possible to prevent devitrification or striae from occurring in the glass molded body. Thus, a glass molded body having a desired shape can be produced.

  The present invention is a glass for continuously forming glass by drawing molten glass from the other end of the mold while continuously flowing the molten glass from the outlet to one end of the mold having a predetermined width. In the method for producing a molded body, at one end, a temperature in a range where the temperature of the molten glass is equal to or lower than the devitrification disappearance temperature and the logarithmic log η of the viscosity η (dPa · s) of the molten glass is 2.0 or less. The temperature of the molten glass is maintained at the softening point or higher at the other end.

  Hereinafter, embodiments of a glass molded body manufacturing method and a control program for causing a computer to execute the glass molded body manufacturing method and a storage medium according to the present invention will be described in detail. However, the present invention is not limited to the following embodiments. The present invention is not limited, and can be implemented with appropriate modifications within the scope of the object of the present invention. In addition, although description may be abbreviate | omitted suitably about the location where description overlaps, the meaning of invention is not limited.

[Overall configuration of apparatus used for glass molding production method]
1 and 2 schematically show an apparatus used in the method for producing a glass molded body of the present invention. This apparatus has a mold 2 having a predetermined width for molding the molten glass G, and an outlet 1 that is located above the mold 2 and flows down the molten glass G onto the mold 2.

  Further, in some cases, after the molten glass G is drawn out, the annealing device 4 may be connected to the vicinity of the other end of the mold 2 for annealing (slow cooling).

  A heater 3 may be provided on the side or bottom of the mold 2.

  The first temperature detecting means 21 and the second temperature detecting means 22 are respectively provided on the side surface in the vicinity of the center and the other end of the mold 2 and in the vicinity of the molten glass G flowing down to the mold 2 (for example, the back surface of the one end). In addition, the temperature of the molten glass G can be indirectly measured.

[Method for producing glass molded body]
First, the molten glass G is continuously flowed from the outlet 1 to one end of the mold 2.

  The molten glass G flowing down near one end of the mold 2 has a temperature of the molten glass G equal to or lower than the devitrification disappearance temperature, and a logarithm log η (hereinafter, referred to as viscosity η (dPa · s) of the molten glass G). The “viscosity of molten glass G” is adjusted to a temperature within a range of 2.0 or less. The viscosity and temperature of the molten glass G are generally in a curve relationship as shown in FIG. 3. If the temperature of the molten glass G is adjusted, the viscosity is adjusted at the same time. By making the temperature of the molten glass G below the devitrification disappearance temperature, it is possible to prevent the glass molded body from devitrifying. Further, by setting the viscosity to 2.0 or less, in the process of drawing out the molten glass G, it is easily formed without causing disadvantages such as striae and in a shape that reflects the inner shape of the mold 2 higher. be able to.

  In order to bring the temperature and viscosity of the molten glass G near one end into a desired range, a cooling means (not shown) is included at the bottom of the mold 2 near the outlet 1, The molten glass G flowing down to one end of the mold 2 is rapidly cooled.

  Although the cooling method (rapid cooling method) by a cooling means can be suitably changed according to the composition of the molten glass G etc., well-known various cooling methods, such as air cooling, oil cooling, and water cooling, are mentioned, for example.

  The cooling rate at which the molten glass G near one end is rapidly cooled by the cooling means can be appropriately changed according to the components of the molten glass G, but is preferably 0.1 to 0.5 ° C./sec. In this range, it is efficient to rapidly cool the molten glass G near one end, and the glass molded body can be prevented from devitrifying. If the cooling rate is too low, devitrification may occur in the molten glass G near one end. On the other hand, if the cooling rate is too high, appearance defects or striae may occur in the glass molded body.

  Therefore, the cooling rate in the vicinity of one end is preferably 0.1 ° C./sec, more preferably 0.12 ° C./sec, most preferably 0.14 ° C./sec, preferably 0.5 ° C./sec. More preferably, the upper limit is 0.48 ° C./sec, and most preferably 0.46 ° C./sec.

  The temperature range of the molten glass G adjusted to a desired temperature and viscosity near one end is adjusted so that the temperature of the molten glass G is not less than the softening point and not more than the dialyzing temperature at the center and the other end. By adjusting such a temperature range, devitrification and striae can be prevented from occurring in the glass molded body.

  Here, when the temperature of the molten glass G is lower than the softening point, the molten glass G is too hard to be easily molded by the mold 2 and difficult to be molded into a shape that reflects the shape of the inner surface of the mold 2 higher. . Moreover, it becomes difficult to mold the molten glass G, and it becomes difficult to faithfully reproduce the inner shape of the mold 2. On the other hand, when the temperature of the molten glass G exceeds the dedialysis temperature, devitrification may occur during the molding of the glass molded body.

  The molten glass G in which the temperature of the molten glass G is adjusted to be equal to or lower than the devitrification disappearance temperature and the logarithm log η of the viscosity η (dPa · s) of the molten glass G is 2.0 or less is melted at the other end. The temperature range is adjusted so that the temperature of the glass G is not lower than the softening point and not higher than the dialysis temperature. By adjusting the temperature range so that the temperature of the molten glass G is not less than the softening point and not more than the dedialysis temperature, it is possible to prevent devitrification or striae from occurring in the glass molded body. When the temperature of the molten glass G is lower than the softening point, it becomes difficult to mold the molten glass G, and it becomes difficult to faithfully reproduce the shape of the molded part of the mold 2. On the other hand, when the temperature of the molten glass G exceeds the dedialysis temperature, devitrification may occur in the glass molded body.

  In order to adjust the temperature so that the temperature of the molten glass G at the other end is not less than the softening point and not more than the dialyzing temperature, a heater 3 may be provided on at least one side or bottom of the mold 2. 1 and 2, the heater 3 is illustrated on both side surfaces, but may be provided on one side surface or provided on the bottom surface of the mold 2. Moreover, you may abbreviate | omit the heater 3 as needed. The heater 3 can be a known heating means such as a gas burner, an electric heater or a high frequency heater.

By appropriately heating the molten glass G with the heater 3, the cooling rate of the molten glass G at the center and the other end may be 5.0 × 10 ^{−3 to} 40.0 × 10 ⁻³ ° C./sec. preferable. By setting the cooling rate within such a range, it is possible to easily form the shape of the inner surface of the mold 2 that reflects the shape higher without causing devitrification on the mold 2. When the cooling rate of the molten glass G is out of the above range, it is difficult to maintain the glass temperature within a desired range.

Therefore, the cooling rate of the molten glass G at the central portion and / or the other end is preferably 5.0 × 10 ⁻³ ° C./sec, more preferably 6.0 × 10 ⁻³ ° C./sec, most preferably The lower limit is 7.0 × 10 ⁻³ ° C./sec, preferably 40.0 × 10 ⁻³ ° C./sec, more preferably 38.0 × 10 ⁻³ ° C./sec, and most preferably 36.0 × 10 ^{− The} upper limit is ³ ° C / sec.

  First temperature detection means 21 is provided on the side surface near the center and the other end of the mold 2. Based on the temperature of the molten glass G in the vicinity of the other end measured by the first temperature detection means 21, the drawing speed of the molten glass G, the heating intensity by the heater 3, and the like can be adjusted as appropriate. Thereby, the temperature of the molten glass G in the vicinity of the other end can be adjusted to the softening point or higher and the dialysate discharge temperature or lower. Note that the drawing speed of the molten glass G, the heating intensity by the heater 3, and the like may be changed continuously or may be changed intermittently.

  In the method of the present invention, the method for obtaining the temperature information of the molten glass G is not particularly limited, and any of a non-contact type such as a radiation thermometer and a contact type such as a thermocouple can be used.

  Further, if necessary, the first temperature detecting means 21 and the second temperature on one side near the one end where the molten glass G flows out to the side near the center and the other end of the mold 2 may be set at the second temperature. The detection means 22 may be installed (in FIG. 1 and FIG. 2, it has the 2nd temperature detection means 22 near the back surface of one end part). The first temperature detection means 21 and the second temperature detection means 22 are preferably thermocouples connected to the mold 2. By measuring the temperature of the mold 2 using these temperature detection means, the temperature information of the molten glass G can be acquired indirectly.

  By indirectly controlling the temperature of the molten glass G by the first temperature detecting means 21 and the second temperature detecting means 22, the mold 2 is heated and heated so that the temperature of the molten glass G becomes a preset temperature. It can be controlled to cool. Further, by indirectly managing the temperature of the molten glass G by the first temperature detecting means 21 and the second temperature detecting means 22, the drawing speed of the molten glass G, the cooling speed of the molten glass G by the cooling means, and the heater 3 are used. The heating (heating intensity) can be changed continuously or intermittently.

[Control program and storage medium for causing computer to execute manufacturing method of glass molded body]
A storage medium storing software program codes for realizing the above-described embodiments is supplied to a system or apparatus, and the system or the computer or CPU of the glass molded body manufacturing apparatus reads the program codes stored in the storage medium. You may make it perform.

  In this case, the program code itself read from the storage medium realizes the functions of the above-described embodiment, and the storage medium storing the program code constitutes the glass molded body manufacturing method of the present invention. .

  Examples of the storage medium for supplying the program code include various known storage media such as a flexible disk, a hard disk, an optical disk, a magneto-optical disk, a CD-ROM, a CD-R, a magnetic tape, a nonvolatile memory card, and a ROM. Can be used.

  Further, by executing the program code read by the computer, not only the functions of the above-described embodiments are realized, but also an OS (operating system) or the like running on the computer based on an instruction of the program code. The functions of the above-described embodiment may be realized by performing part or all of the actual processing.

  Further, after the program code read from the storage medium is written in a memory provided in a function expansion board inserted into the computer or a function expansion unit connected to the computer, the function expansion board is based on the instruction of the program code. Alternatively, a CPU or the like provided in the function expansion unit may perform part or all of the actual processing, and the functions of the above-described embodiments may be realized by the processing.

  Examples of the present invention will be described below. However, these examples are merely examples for suitably explaining the present invention, and do not limit the present invention.

Molten glass G (hereinafter referred to as optical glass a) containing B ₂ O ₃ and Bi ₂ O ₃ as main components is melted, and a sheet glass (glass molded body) is formed using the apparatus shown in FIGS. did.

The optical glass a had a softening point of 570 ° C. and a dedialysis temperature of 690 ° C., but the loss of devitrification temperature could not be measured. That is, since the optical glass a is excellent in stability at the time of melting, the tendency to devitrification is small when cooled, and no devitrification occurred even if it was cooled to any temperature and held for 30 minutes.
The optical glass a was allowed to flow from the outlet 1 to one end of the mold 2. In addition, the temperature of the optical glass a at the time of outflow was 945 degreeC, and the viscosity in that case was 1.0. The optical glass a was cooled by the cooling means included in the mold 2 at the one end. And it was shape | molded from the other end part of the shaping | molding die 2 as a sheet glass.

  In the process of drawing out the sheet glass, the side surface of the mold 2 is continuously formed using the heater 3 so that the temperature near the center and the other end of the mold 2 is not less than the softening point and not more than the dialyzing temperature. And the temperature of the molten glass G was adjusted.

  The cooling intensity of the cooling means and the heating intensity of the heater 3 were appropriately adjusted based on the detected temperatures of the first temperature detecting device and the second temperature detecting device connected in the mold 2.

  Table 1 shows the temperature of the molten glass at points (A) to (C) on the mold 2. In the table, the measurement location (A) is located at one end, (B) is located at the center, and (C) is located at the other end. In addition, the temperature of following (A)-(C) is the result of having measured the optical glass a itself with the radiation thermometer different from the 1st temperature detection means 21 and the 2nd temperature detection means 22. FIG.

  From Table 1, the measurement temperature in a measurement location (A) was 945 degreeC, and the viscosity was 2.0 or less as above-mentioned. Moreover, the temperature of the optical glass a in the center part (B) and the other end part (C) was able to be adjusted below the dedialysis temperature below the softening point. The plate-like molded product of the optical glass “a” manufactured under such conditions had no defects such as striae and devitrification.

[Comparative example]
In the comparative example, in the other end portion, the mold 2 was not continuously heated by the heater 3, and the temperature of the molten glass G was not adjusted so as to be equal to or higher than the softening point and equal to or lower than the dialyzing temperature. As well as. The results are shown in Table 2.

  From Table 2, the temperature of the optical glass A has fallen below the softening point in the measurement locations (B) and (C) which are the other end portions. As a result, in the glass molded body, the corners of the plate glass were rounded, and the plate glass reflecting the shape of the inner surface of the mold 2 could not be molded.

It is the figure which looked at the manufacturing apparatus of the manufacturing method of the glass forming body of this invention from the top. It is a three-dimensional view of the manufacturing apparatus of the manufacturing method of the glass forming body of this invention. It is the graph which showed the relationship between the temperature of a molten glass, and logarithm log (eta) of viscosity (eta) (dPa * s).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Outflow port 2 Mold 21 First temperature measurement means 22 Second temperature measurement means 3 Heater 4 Annealing apparatus

Claims (12)

A glass molded body for continuously molding glass by drawing the molten glass from the other end of the mold while continuously flowing the molten glass from the outlet to one end of the mold having a predetermined width. In the manufacturing method of
At the one end, the temperature of the molten glass is not higher than the devitrification disappearance temperature, and the logarithm log η of the viscosity η (dPa · s) of the molten glass is cooled to a temperature in the range of 2.0 or less,
A method for producing a glass molded body, wherein the temperature of the molten glass is maintained at a temperature equal to or higher than a softening point on the mold.   2. The method for producing a glass molded body according to claim 1, wherein the molten glass is rapidly cooled by a cooling means included in the mold at the one end from the outlet from which the molten glass flows down.   3. The method for producing a glass molded body according to claim 1, wherein the molten glass is maintained in a temperature range not less than a softening point and not more than a dedialysis temperature at a center portion and the other end portion of the mold.   The glass molded body according to any one of claims 1 to 3, wherein the molten glass is maintained in a temperature range not lower than the softening point and not higher than the dialyzing temperature by heating at least one side surface or bottom surface of the mold. Method. The cooling rate of the molten glass at one end portion of the mold is the 0.1 to 0.5 ° C. / sec, at the other end from the center of the mold, the cooling rate of the glass is 5.0 × 10 ^{- It is} 3-40.0 * 10 < ^-3 > degreeC / sec, The manufacturing method of the glass forming body in any one of Claim 1 to 4.   The method for producing a glass molded body according to any one of claims 1 to 5, wherein the logarithm log η of the viscosity η (dPa · s) of the molten glass is adjusted by adjusting the temperature of the molten glass.   The manufacturing method of the glass molded object in any one of Claim 1 to 6 which cools and heats the said shaping | molding die so that the temperature of the said molten glass of the said one end part and the said other end part may respectively become preset temperature. Method.   The manufacturing method of the glass molded object of Claim 7 which provides a 1st temperature detection means in the side surface of the said shaping | molding die, and measures the temperature of the said molten glass side surface by the said 1st temperature detection means.   Furthermore, the glass of Claim 7 which provides a 2nd temperature detection means in the upper direction, back surface, side surface, or bottom face of the one end part of the said shaping | molding die, and measures the temperature around the one end part of the said molten glass by the said 2nd temperature detection means. Manufacturing method of a molded object.   Based on the temperature of the molten glass detected by the first temperature detection means and the second temperature detection means, the drawing speed of the molten glass, the cooling speed at the one end where the molten glass flows down, the side surface of the mold The manufacturing method of the glass forming body of Claim 8 or 9 adjusted so that the heating intensity of can be changed continuously or intermittently.   The control program for making a computer perform the manufacturing method of the glass forming body in any one of Claim 1 to 10.   The storage medium which stored the control program for making a computer perform the manufacturing method of the glass forming body in any one of Claim 1 to 10.

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