KR101725699B1 - Molded glass body manufacturing method, and molded glass body manufacturing device - Google Patents

Abstract

(A stigmatism) caused by the temperature distribution unevenness of the mold unit and the glass material generated during the pressing process is suppressed. The glass molded article manufacturing apparatus 1 includes a rotation mechanism 14 that is formed in each treatment chamber other than the press chamber 26 and that intermittently rotates the mold unit 8, (15) for controlling the stopping time at the stop angle position, and the mold unit (8) is intermittently rotated by the rotating mechanism (14) in at least one of the quenching step and the heating step, 15 is stopped when the mold unit is stopped at a relative angle position different from the initial relative angular position with respect to the stop time at which the mold unit 8 is stopped at the initial relative angle position with respect to the conveyance path immediately after being brought into each processing chamber And controls the rotating mechanism 14 so that the time is lengthened.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for manufacturing a glass molded article,

The present invention relates to a method for producing a glass molded article and an apparatus for producing a glass shaped article and more particularly to a manufacturing apparatus for a glass molded article in which a heater is formed on both sides of a conveyance path of a heating chamber, And a method of manufacturing a molded article.

BACKGROUND ART [0002] In recent years, a glass molded article such as a lens has been produced by using a device for producing a glass molded article by placing a glass material in a mold, heating the glass material and the mold, and press-molding the softened glass material by a die. Examples of the apparatus for producing such a glass molded article include a mold unit in which a heating chamber, a press chamber, and a curing chamber are arranged in an arc and a glass material is arranged inside the mold by a turntable, A pressing process, and a quenching process on the glass material while sequentially conveying the glass material, the press chamber, the press chamber, and the circulating chamber.

In such a manufacturing apparatus, heaters are formed on both sides of the conveyance path of the heating chamber, the press chamber, and the mold unit of the sucrose chamber. As a result, both sides of the conveying path receive more radiation heat from the heater than the front portion and the rear portion of the mold unit with respect to the conveyance path, and the temperature distribution of the glass unit and the glass material disposed therein is not uniform It is destroyed. Such unevenness in the temperature distribution of the mold unit and the glass material causes a shape defect (astigmatism) to occur in the lens.

On the other hand, in Patent Document 1 (Japanese Unexamined Patent Publication No. 2012-12235), in order to prevent such a defective shape of the lens (astigmatism), rotation means for rotating the mold unit on the turntable is formed in the heating chamber And when the mold unit is heated in the heating chamber, the mold unit is intermittently rotated at 90-degree intervals at equal intervals. According to the apparatus disclosed in Patent Document 1 (Japanese Unexamined Patent Application Publication No. 2012-12235), by rotating the mold unit intermittently in the heating chamber, the temperature of the mold unit and the glass material generated in the heating chamber due to the arrangement of the heater Distribution irregularity can be suppressed.

Japanese Laid-Open Patent Publication No. 2012-12235

However, in the apparatus described in the above-mentioned Patent Document 1 (Japanese Unexamined Patent Publication No. 2012-12235), the mold unit can not be rotated during the pressing process. Therefore, the temperature distribution irregularity of the mold unit and the glass material in the heating chamber can be suppressed, but the temperature distribution unevenness occurs in the mold unit and the glass material during the press processing. As a result, there has been a problem that defective shape (astigmatism) is still generated in the molded lens.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to suppress generation of a shape defect (astigmatism) caused by a temperature distribution unevenness of a mold unit and a glass material generated during a pressing process.

A method of manufacturing a glass shaped article of the present invention is a method of manufacturing a glass shaped article, comprising a transport mechanism for transporting a mold unit in which a glass material is disposed along a predetermined transport path, a heating chamber for performing heat treatment on the glass material formed along the transport path, And a heater formed on both sides of the conveyance path of the pressurizing chamber, the pressurizing chamber for pressurizing the glass material, the cooling chamber for performing the cooling treatment for the glass material, and the heating chamber, the press chamber, A method for manufacturing a glass molded article, comprising: a rotating mechanism which is formed in a chamber of at least one of a circulation chamber and a heating chamber and which intermittently rotates the mold unit; A heating step of heating the glass material with a heater in a heating chamber, A pressing step of pressing the glass material while heating the glass material by the heater in the press chamber and a cooling step of lowering the temperature of the molded material pressed by the heater in the circulating chamber while controlling the temperature of the pressed material, , The mold unit is intermittently rotated by the rotating mechanism in at least one of the quenching step and the heating step, and the control unit causes the mold unit to be initialized to the initial position of the transfer path immediately after the mold unit is brought into the chamber of at least one of the sucrose chamber and the heating chamber The rotation mechanism is controlled so that the stop time at which the mold unit is stopped at the relative angle position different from the initial relative angle position is longer than the stop time at the relative angle position.

The present invention also provides an apparatus for manufacturing a glass molded body, comprising: a transport mechanism for transporting a mold unit in which a glass material is disposed along a predetermined transport path; a heating chamber , A press chamber for performing a press treatment on a glass material, a cold room for applying a cold treatment to the formed article, and a heater formed on both sides of the conveyance path of the heating chamber, the press room, , The apparatus for manufacturing a glass molded article is provided with a rotating mechanism which is formed in a chamber of at least one of a circulating chamber or a heating chamber and which intermittently rotates the mold unit and a stay time at a stop angle position and a stop angle position of the rotating mechanism The control unit controls the initial phase of the transfer path immediately after the mold unit is brought into the chamber of at least one of the circulation chamber and the heating chamber, In the angular position than in stationary stop time, the mold unit is the initial relative angular position and so that the different stop time and stop at an angular position relative longer control the rotating mechanism.

According to the present invention, in the pressurizing step of the mold unit in at least one of the circulating chamber and the heating chamber, the portions located on both sides in the conveying direction are located at positions opposed to the forward and backward portions with respect to the conveying direction in the pressing step , More heat is received from the heater of at least one of the circulating chamber or the heating chamber. Therefore, it is possible to suppress the temperature distribution irregularity of the glass material in the mold unit and the mold unit which are generated in the pressing step and the stopping step.

The term " heating chamber " as used herein means not only a chamber for heating a mold unit containing a glass material to a predetermined temperature before press processing but also a chamber for heating the mold unit containing the heated glass material at a predetermined temperature It also includes rooms for

In the present application, the term " rotation " means that the mold unit is rotated around the central axis of the mold unit.

According to the present invention, it is possible to suppress the occurrence of a defective shape (astigmatism) caused by the temperature distribution irregularity of the mold unit and the glass material generated during the pressing process.

1 is a horizontal sectional view showing a configuration of an apparatus for manufacturing a lens molded body according to the embodiment.
Fig. 2 is a cross-sectional view taken along line II-II in Fig.
Fig. 3 is a vertical cross-sectional view of the mold unit taken along the line III-III in Fig. 1. Fig.
4 is a vertical sectional view of the mold unit.
5 is a diagram showing the ratio of the stopping time at each angular position in each of the patterns assumed for determining the drive timing of the rotating mechanism in each of the chambers other than the press chamber.
FIG. 6 is a graph showing the relationship between the ratio of the time when the mold unit is stopped at 90 degrees or 270 degrees to the initial angular position and the relationship between the astigmatism occurring in the glass formed body (lens).
7 is a graph showing the temperature change of the glass material (glass molded article) in each processing for glass molding in the production method of the glass forming body of the present embodiment, in which the horizontal axis represents time and the vertical axis represents temperature have.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals, and description thereof is not repeated.

2 is a sectional view taken along the line II-II in Fig. 1, and Fig. 3 is a sectional view taken along the line III-III in Fig. 1. Fig. 1 is a horizontal cross- FIG. 4 is a vertical sectional view of the mold unit.

1 to 3, an apparatus 1 for manufacturing a lens molded body according to the present embodiment includes an outer casing 2 formed in a substantially cylindrical shape, a turntable 4 formed in the outer casing 2, And has an inner casing 6 on the circular arc of the horizontal cross section formed above the turntable 4 in the casing 2. [ The outer casing 2, the inner casing 6, and the turntable 4 are concentrically arranged.

The outer casing 2 has a substantially cylindrical space defined therein and an opening 2A is formed in a part of the side surface thereof for loading and unloading the mold unit 8. A shutter (not shown) is attached to the opening 2A, and the shutter opens when the mold unit 8 is carried in and out. The inner space of the outer casing 2 is an inert gas atmosphere. As the inert gas, nitrogen, argon, or the like is used, and the oxygen concentration is preferably 5 ppm or less. Further, by making the inner space an inert gas atmosphere in this way, it is possible to prevent oxidation of the mold unit 8 and surface deterioration of the glass material.

The turntable 4 includes a rotating disk 10, a driving shaft (not shown) connected to the center of the rotating disk 10, and a driving mechanism (not shown) such as a motor for rotating the driving shaft. In the rotating disk 10, nine circular openings 10A are formed at equal angular intervals on the circumference of a predetermined radius. The opening 10A is smaller in diameter than the bottom portion 12A of the mold supporting member 12 constituting the mold unit 8 and is formed to have a diameter larger than the rotational axis 14A of the rotating mechanism 14 have. The mold unit 8 is disposed on the opening 10A of the rotary disk 10 and rotates the respective processing chambers in the inner casing 6 by rotating the rotary disk 10. [ In the present embodiment, the turntable 4 carries the mold unit 8 along the circumference of a predetermined radius by rotating the drive mechanism intermittently at predetermined intervals in a predetermined angle. The path through which the mold unit 8 is conveyed corresponds to the conveying path of the present invention.

In addition, the turntable 4 stops during a predetermined period of time during each rotation operation. In this stopped state, the opening 10A formed in the rotating disk 10 is positioned just above the rotating mechanism 14 provided in each processing chamber. The stop time of the turntable 4 is determined to be longer than the time required for the press processing in the press chamber 26. [

The inner casing 6 includes an inner wall 6A extending concentrically with the outer casing 2 in a circular arc over an angular range of 280 degrees in the horizontal direction and an inner wall 6A extending radially outward of the inner wall 6A, A ceiling portion 6C covering an inner wall 6A and an upper portion of the outer wall 6B and an upper wall 6B extending between the inner wall 6A and the lower portion of the outer wall 6B The closure has a bottom portion 6D. The inner casing 6 is formed with an arc-shaped processing space having an arc-shaped horizontal section by the inner wall 6A, the outer wall 6B, the ceiling portion 6C, and the bottom portion 6D. An arc-shaped slit 6E is formed in the bottom portion 6D of the inner casing 6 along the conveying path of the mold unit 8. [ The width of this slit 6E is larger than the diameter of the intermediate portion 12B of the mold supporting member 12 on which the mold unit 8 is placed.

The processing space of the inner casing 6 is divided into seven chambers in the angular range of a certain angle in the rotating direction of the turntable 4. [ These seven chambers are disposed in the first quenching chamber 20, the second quenching chamber 22, the crack chamber 24, the press chamber 26, the first quench chamber 28 ), A second circulating chamber (30), and a third circulating chamber (32). A shutter (not shown) is formed between the circumferential end of the inner casing 6 and each of the chambers.

The first susceptor 26, the first susceptor 28, the second susceptor 30, and the third susceptor 26. The first susceptor 20, the second susceptor 22, the cracking chamber 24, the pressurizing chamber 26, The heaters 34, 36, 38, 40, 42, 44, and 46 are respectively formed in the heaters 32, 32. These heaters 34, 36, 38, 40, 42, 44 and 46 are formed on both sides of the conveyance path of the mold unit 8 and are respectively disposed in the first and second heat receiving chambers 20, The crack chamber 24, the press chamber 26, the first circulating chamber 28, the second circulating chamber 30 and the third circulating chamber 32 are heated to a predetermined temperature.

3, a pressing mechanism 47 is formed above the press chamber 26 of the outer casing 2, respectively. The press mechanism 47 includes an actuator 47A such as a hydraulic jack accommodated in a receiving chamber formed above the ceiling portion of the outer casing 2 and an actuator 47A mounted on the tip of the piston 47B of the actuator 47A And a pressing plate 47C.

Openings are formed below the main body of the actuator 47A of the ceiling portions 2C and 6C of the outer casing 2 and the inner casing 6, respectively. The piston 47B of the actuator 47A passes through the openings of the ceiling portions 2C and 6C of the outer casing 2 and the inner casing 6 and the lower end reaches the inside of the press chamber 26. [ By driving the actuator 47A, the pressure plate 47C is lowered to press the mold unit 8 in the press chamber 26 from above.

It is also possible to prevent the first and second serpentine chambers 20 and 22 from being moved downward in the first and second quench chambers 20 and 22, the crack chamber 24, the first and second centrifugal chambers 30 and 30, A rotation mechanism 14 for rotating the mold unit 8 in each chamber is formed. 2, the rotating mechanism 14 includes a rotation driving mechanism 14B such as a motor, a rotation shaft 14A rotated by the rotation driving mechanism 14B and capable of advancing and retracting in the upward direction, And a support portion 14C formed at the tip of the rotary shaft 14A. Each thread rotating mechanism 14 is connected to the control unit 15 and the control unit 15 can control the start, stop and rotation speed of the rotation drive of the rotation drive mechanism 14B.

When the turntable 4 is moved, the rotating mechanism 14 rotates so that the upper surface of the supporting portion 14C is lower than the lower surface of the rotating plate 10 so that the rotating shaft 14A and the supporting portion 14C do not interfere with the turntable 4 The rotation axis 14A is regressed until the rotation shaft 14A is rotated. Hereinafter, a state in which the rotation shaft 14A is retreated until the support portion 14C becomes lower than the rotating disk 10 is referred to as a standby state of the rotating mechanism 14. [

When the mold unit 8 is rotated by the rotating mechanism 14, first the rotation shaft 14A is extended and the mold unit 8 placed on the turntable 4 is lifted up by the support portion 14C. At this time, while the mold unit 8 is being processed in each processing chamber, the turntable 4 is rotated by the rotation of the rotating mechanism 10 such that the opening 10A formed in the rotating disk 10 is positioned above the rotating mechanism 14 The rotation shaft 14A is allowed to pass through the opening 10A. In this state, while the mold unit 8 is lifted, the rotation drive mechanism 14B rotates to rotate the rotation shaft 14A. Then, the rotating shaft 14A is further regressed and returned to the standby state.

The control unit 15 controls the respective processing chambers (i.e., the first heating chamber 20, the second heating chamber 22, the crack chamber (not shown) other than the press chamber 26 when the turntable 4 is in the stopped state, While the mold unit 8 is being processed in the first and second centrifugal chambers 24, 28, 28, 30, 32, The rotation of the rotation mechanism 14 is stopped so as to stop at the stop angle position of the rotation mechanism 14.

Further, the control unit 15 controls the stopping time at the timing at which the rotating mechanism 14 rotates four times by 90 degrees, that is, at the stop angle position. The control unit 15 controls the rotation mechanism 14 so as to eliminate the temperature unevenness of the mold unit 8 and the glass material 60 housed therein during the press processing in the press chamber 26. [ And controls the timing at which the motor rotates.

1, the quenching portion 48 and the exchanging portion 50 are formed between the third circulating chamber 32 and the first quenching chamber 20 in the conveying path in the outer casing 2. The quenching portion 48 is a region for rapidly cooling the mold unit 8 conveyed from the third circulating chamber 32. Since the heater is not disposed around the quenching portion 48, the quenching portion 48 is at almost the same temperature as the outside of the apparatus. The exchange unit 50 is connected to the mold unit 8 accommodating the glass molding body that has been formed through the opening 2A of the outer casing 2 and the mold unit 8 ).

4, the mold unit 8 includes a mold 52 and a mold support member 12, and the mold 52 is mounted on the mold support member 12. As shown in Fig. The mold 52 includes an upper mold 54 and a lower mold 56 having a molding surface formed in conformity with the shape of a glass molded body to be manufactured and a pair of upper molds 54 and lower mold 56, And has a body shape 58 for regulating the position. On the molding surfaces of the upper mold 54 and the lower mold 56, a release film is formed. The glass material 60 is arranged to be sandwiched between the upper mold 54 and the lower mold 56. The upper and lower molds 54 and 56 are pressed in a relatively close direction while the glass material 60 is heated to the glass yielding point temperature or more so that the molding surface shape is transferred to the glass material to form a glass molding ).

In the above-described manufacturing apparatus 1 for producing a glass molded body, both sides of the mold unit 8 are continuously provided on the surface of the heater 40 during the period from the start to the end of the press process in the press chamber 26 And the front and rear surfaces are not facing the heater 40. Therefore, both side portions of the mold unit 8 receive more radiation heat from the heater than the front portion and the rear portion.

On the other hand, in the present embodiment, the control unit 15 controls the mold unit 8 so that the mold unit 8 is at a relative angle different from the initial relative angle position by a time longer than the stop time at which the mold unit 8 stops at the initial relative- And controls the rotating mechanism 14 so that the stopping time at which the stopping at the position becomes longer.

Specifically, the control unit 15 controls the rotating mechanism 14 to rotate the mold unit 8 by 90 degrees four times, intermittently, until the rotating unit 14 is carried into each processing chamber and then taken out from each processing chamber . Thereby, the relative angular position (referred to as the initial relative angle position) relative to the conveying path immediately after the mold unit 8 is brought into each processing chamber and the angle relative to the conveying path immediately before the mold unit 8 is taken out from each processing chamber Position (referred to as relative angle position) becomes equal.

The control unit 15 determines whether or not the rotation timing of these four times is shorter than the time at which the mold unit 8 stops at the relative relative angle position or the relative angle position where the relative position is rotated by 180 degrees relative to the initial relative angle position. 8 to the relative angular position of 90 degrees or 270 degrees is prolonged.

As a result, in the respective processing chambers other than the press chamber 26, the portion of the mold unit 8 which does not face the heater 40 in the pressing step is pressed against the portion facing the heater 40 in the pressing step The heaters 34, 36, 38, 42, 44, and 46 of the respective chambers receive more heat. Therefore, it is possible to suppress the temperature distribution unevenness of the glass material 60 in the mold unit 8 and the mold unit 8, which are generated in the pressing step.

Further, as described below, by determining the driving timings of the rotating mechanism 14 in each of the chambers other than the press chamber 26, it is possible to suppress the occurrence of the temperature distribution irregularity of the glass material 60 more efficiently .

5 is a diagram showing the ratio of the stopping time at each angular position in each of the patterns assumed for determining the drive timing of the rotating mechanism in each of the chambers other than the press chamber 26. [ The rotating mechanism 14 in each chamber other than the press chamber 26 of the glass molding production apparatus 1 of the present embodiment rotates intermittently every 90 degrees. 5, the angular position of the mold unit 8 immediately after being conveyed to each of the chambers is set as the initial angular position, and with respect to the staying time until the mold unit is carried in and out of the respective chambers, When the ratio of the time when the mold unit 8 is stopped at 90 degrees or 270 degrees in the counterclockwise direction with respect to the initial angular position is 0%, 40%, 60%, 80%, 85%, and 100% , A glass molded article (lens) was produced, and the occurrence of astigmatism was observed for each case. In this embodiment, the mold unit 8 is designed so that the time when the mold unit 8 stops at 90 degrees relative to the initial angular position becomes equal to the time when the mold unit 8 stops at 270 degrees, The control unit 15 controls the rotating mechanism 14 so that the time at which the stopping at the 0 degree with respect to the angular position becomes equal to the time at which the stopping at the 180 degree is stopped.

6 is a graph showing the relationship between the ratio of the time when the mold unit 8 is stopped at 90 degrees or 270 degrees to the initial angular position and the relationship between the astigmatism occurring in the glass formed body (lens). The vertical axis in the graph indicates the time period when the mold unit is stopped at 90 degrees or 270 degrees, and the time when the mold unit is staying in each processing room (referred to as a 90 DEG (270 DEG) stop time ratio) is 50% Represents the ratio of the number of occurrence of a stigmatism that is standardized by the number of stigmatism.

As shown in the figure, when the 90 ° (270 °) stopping time ratio is smaller than 50%, the occurrence ratio of astigmatism exceeds 1. On the other hand, if the 90 ° (270 °) stopping time ratio is increased to 50% or more, the occurrence rate of astigmatism decreases to 1 or less. When the 90 ° (270 °) stopping time ratio is 60%, the occurrence ratio of astigmatism is 0.75. When the 90 ° (270 °) stopping time ratio is 85% 0.65. When the 90 ° (270 °) stopping time ratio is increased to 85%, the occurrence ratio of astigmatism increases. When the 90 ° (270 °) stopping time ratio is 95% 1.

Thus, when the 90 ° (270 °) stopping time ratio is 50% or more and 95% or less, the occurrence ratio of astigmatism is 1 or less. In addition, by setting the 90 ° (270 °) stop time ratio to 60% or more and 85% or less, the occurrence ratio of astigmatism can be suppressed to 0.65 to 0.75.

Therefore, it is preferable that the time during which the mold unit 8 is stopped at 90 degrees or 270 degrees with respect to the initial angular position is 50% or more and 95% or less of the time during which the mold unit is in each treatment chamber . Further, it is preferable that the mold unit is not less than 60% and not more than 85% of the time of staying in each treatment chamber.

Hereinafter, a method of manufacturing a glass molded article by the apparatus 1 for manufacturing a glass molded article of the present embodiment based on the above-described examination will be described. In the following description, a description will be given of a method of manufacturing a glass molded article by paying attention to one mold unit 8. In the glass-molded article manufacturing apparatus 1 of the present embodiment, a plurality of mold units 8 are arranged on a turntable Is conveyed continuously along the conveying path by the conveying path 4, and processes such as heating, pressing, and cooling are simultaneously performed in the respective processing chambers.

7 is a graph showing the temperature change of the glass material (glass molded article) 60 in each process for glass forming in the production method of the glass forming body of the present embodiment, in which the horizontal axis indicates the time, Lt; / RTI >

The shutter of the opening 2A of the outer casing 2 is opened when the turntable 4 rotates and the mold unit 8 accommodating the glass molding body that has undergone the molding process reaches the exchanging portion 50. [ When the shutter of the opening of the outer casing 2 is opened as described above, the mold unit 8 having been subjected to the molding process is taken out to the outside through the opening 2A and the mold unit 8 containing the new glass material is taken out of the turntable 4 ) Disposed on the opening 10A formed in the rotating disk 10 of FIG.

When the stop time (hereinafter referred to as tact time) of the turntable 4 preset in advance from the completion of the previous rotation operation has elapsed, the shutter formed between the circumferential end of the inner casing 6 and the respective chambers is opened, (4) is rotated in a counterclockwise direction at a constant angle when viewed from the plane. The tact time is almost equal to the time until the mold unit 8 is carried in and out of each chamber. Thus, the mold unit 8 is conveyed into the first quench chamber 20 while being held by the mold support member 12. [ At this time, since the die support member 12 passes through the slit 6E formed in the bottom portion of the inner casing 6, the die support member 12 and the inner casing 6 do not interfere with each other.

When the mold unit 8 is transferred to the first quench chamber 20, a first quenching step of rapidly heating the mold unit 8 is performed. The first quenching chamber 20 is maintained at a temperature equal to or higher than the glass yield point temperature Ts by the heater 34 formed on both sides of the conveying path. The mold unit 8 conveyed to the first quenching chamber 20 is heated by the heater 34 formed on both sides of the conveying path.

In the first quenching step, while the mold unit 8 is heated by the heater 34, the mold unit 8 is rotated by the rotating mechanism 14 as follows.

That is, when the mold unit 8 is transferred to the first quench chamber 20, the rotating mechanism 14 rotates the mold unit 8 by 90 degrees in a counterclockwise direction as viewed in plan. Thereby, the mold unit 8 is rotated by 90 degrees relative to the relative angular position immediately after being conveyed to the first quenching chamber 20. [ The rotating mechanism 14 rotates until the time when the mold unit 8 reaches 42.5% of the stop time (hereinafter referred to as tact time) of the turntable 4 preset in the first heat supply chamber 20 Stop.

Then, when 42.5% of the time of staying in the first quench chamber 20 has elapsed, the rotating mechanism 14 again rotates the mold unit 8 by 90 degrees counterclockwise as viewed in plan. As a result, the mold unit 8 is rotated 180 degrees relative to the relative angular position immediately after being conveyed to the first heat-transfer chamber 20. In this state, the rotating mechanism 14 stops until 7.5% of the tact time has elapsed.

When the rotating mechanism 14 stops for 7.5% of the tact time, the mold unit 8 is further rotated by 90 degrees counterclockwise as viewed in plan. Thereby, the mold unit 8 is in a state rotated by 270 degrees relative to the relative angular position immediately after being conveyed to the first heat-supplying chamber 20. [ Then, the rotating mechanism 14 stops until the time of 42.5% of the tact time of the mold unit 8 has elapsed.

Then, when the rotating mechanism 14 stops for a time of 42.5% of the tact time, the mold unit 8 is further rotated by 90 degrees in the counterclockwise direction as seen from the plane. As a result, the mold unit 8 returns to the state equivalent to the relative angular position immediately after being conveyed to the first quench chamber 20. [ In this state, the rotating mechanism 14 stops until 7.5% of the tact time has elapsed.

When 7.5% of the tact time elapses after the mold unit 8 is rotated to the state equivalent to the relative angular position immediately after being conveyed to the first heat-receiving chamber 20 by the rotating mechanism 14, 6 and the shutters formed between the respective chambers are opened, and the turntable 4 rotates in a counterclockwise direction at a constant angle as seen from a plane. Thus, the mold unit 8 is conveyed into the second heat-receiving chamber 22 while being held by the mold-supporting member 12. [ When the rotating unit 14 rotates the mold unit 8 at the above timing, the time for which the mold unit 8 is stopped at 90 degrees or 270 degrees with respect to the initial angular position, It is 85% of the time that the user is staying in the room 20.

When the preset tact time elapses from the rotation of the previous turntable 4, a shutter formed between the circumferential end of the inner casing 6 and the respective chambers is opened, and the turntable 4 is rotated counterclockwise Rotate. Thus, the mold unit 8 is conveyed into the second heat-receiving chamber 22 while being held by the mold-supporting member 12. [

When the mold unit 8 is conveyed to the second heat supply chamber 22, a second heat supply step of rapidly heating the mold unit 8 to about the glass yield point temperature Ts is performed. The inside of the second quenching chamber 22 is maintained at a temperature equal to or higher than the glass yield point temperature Ts by the heater 36. [ Thus, the glass material (60) in the mold unit (8) conveyed into the second quench chamber (22) is heated until it reaches about the glass yield point temperature (Ts).

In parallel with this, the control unit 15 performs the operation of intermittently rotating the mold unit 8 in the counterclockwise direction in a plan view at 90 degrees at a predetermined timing, similarly to the first quenching chamber 20 And controls the rotating mechanism 14 immediately below the second quenching chamber 22. That is, the control unit 15 determines whether the mold unit 8 is stopped at 90 degrees or 270 degrees relative to the initial relative angular position in the second quenching chamber 22, like the first quenching chamber 20 And controls the rotating mechanism 14 so as to be 85% of the tact time.

When the preset tact time elapses from the rotation of the previous turntable 4, a shutter formed between the circumferential end of the inner casing 6 and the respective chambers is opened, and the turntable 4 is rotated counterclockwise Rotate. As a result, the mold unit 8 is conveyed into the crack chamber 24 while being held by the mold support member 12.

When the mold unit 8 is conveyed to the crack chamber 24, a cracking step for cracking the mold unit 8 and the glass material 60 contained therein is performed. The inside of the crack chamber 24 is maintained at about the glass yield point temperature Ts by the heater 38. Thereby, the glass material 60 in the mold unit 8 and the mold unit 8 is fused so that the temperature becomes a uniform temperature distribution at the glass yield point temperature Ts.

In the crack chamber 24, as in the case of the first quench chamber 20, the control unit 15 controls the time at which the mold unit 8 stops at 90 degrees or 270 degrees relative to the initial relative angular position, And controls the rotating mechanism 14 to be 85% of the time.

When the preset tact time elapses from the rotation of the previous turntable 4, a shutter formed between the circumferential end of the inner casing 6 and the respective chambers is opened, and the turntable 4 is rotated counterclockwise Rotate. Thereby, the mold unit 8 is conveyed into the press chamber 26 in a state of being held by the mold supporting member 12.

When the mold unit 8 is conveyed to the press chamber 26, a pressing step is performed. In the press step, the mold unit 8 is pressed by the press mechanism 47 while heating the mold unit 8 by the heater 42 so as to maintain the temperature at the glass yield point temperature Ts. At this time, since the heater 42 is formed on both sides of the conveying path, both side portions of the conveying path of the mold unit 8 are heated as compared with the front and rear portions of the conveying path. However, as described above, in the first quenching chamber 20, the second quenching chamber 22, and the crack chamber 24, when the mold unit 8 is stopped at 90 degrees or 270 degrees relative to the initial relative angular position, The rotation of the rotating mechanism 14 is controlled so as to be longer than the time at which the mold unit 8 and the glass material 60 are stopped at the initial relative angular position so that the temperature distribution unevenness occurring in the mold unit 8 and the glass material 60 can be suppressed have.

When the press step is completed and the tact time from the previous rotation of the turntable 4 has elapsed, the shutter formed between the circumferential end of the inner casing 6 and the respective chambers is opened, and the turntable 4 It rotates counterclockwise at a certain angle. As a result, the mold unit 8 is carried in the first centrifugal chamber 28 while being held by the mold support member 12.

In the first circulating chamber 28, a first cooling step for cooling the mold unit 8 while heating the mold unit 8 by the heater 42 is performed. Also in the first circulating chamber 28, the control unit 15 calculates the time for which the mold unit 8 is stopped at 90 degrees or 270 degrees with respect to the initial angular position, as in the case of the first quenching chamber 20 , And controls the rotating mechanism (14) so that the mold unit (8) is 85% of the time that the mold unit (8) is staying in the first centrifugal chamber (28).

When the first tilting step is completed and a predetermined tact time from the previous rotation elapses, the shutter formed between the circumferential end of the inner casing 6 and the respective chambers is opened, and the turntable 4 is opened It rotates clockwise at a certain angle. As a result, the mold unit 8 is carried in the second centrifugal chamber 30 in a state of being held by the mold support member 12.

In the second circulating chamber 30, a second cooling step for slowly cooling the mold unit 8 while heating the mold unit 8 by the heater 44 is performed. The temperature in the second circulation chamber 30 is kept equal to or slightly lower than the temperature (Tg + 10 DEG C) which is 10 DEG C higher than the glass transition temperature by the heater 44 formed on both sides of the conveyance path. Also in the second sucrose chamber 30, the control unit 15 determines whether the time for which the mold unit 8 is stopped at 90 degrees or 270 degrees to the initial angular position , And controls the rotating mechanism (14) so that the mold unit (8) is 85% of the time in which the mold unit (8) is staying in the second centrifuge chamber (30). Thus, the glass formed body (glass material having completed press processing) 60 in the mold unit 8 is cracked at a temperature (Tg + 10 占 폚) which is 10 占 폚 higher than the glass transition temperature.

When the tact time from the previous rotation of the turntable 4 has elapsed, a shutter formed between the circumferential end of the inner casing 6 and the respective chambers is opened, and the turntable 4 is rotated in a counterclockwise direction . Thereby, the mold unit 8 is conveyed from the second circulating chamber 30 into the third circulating chamber 32 while being held by the mold supporting member 12.

When the mold unit 8 is conveyed to the third circulating chamber 32, the third cooling step for further cooling the mold unit 8 is carried out. The third circulating chamber 32 is maintained at a temperature sufficiently lower than the glass transition temperature Tg by the heater 46 formed on both sides of the conveying path.

Also in the third stopper chamber 32, the control unit 15 controls the time for which the mold unit 8 is stopped at 90 degrees or 270 degrees with respect to the initial angular position as in the case of the first dispenser 20 , And controls the rotating mechanism (14) so that the mold unit (8) is 85% of the time that the mold unit (8) is staying in the third centrifugal room (32). Thereby, the glass formed body (glass material with completed press processing) 60 in the mold unit 8 is cooled to a temperature sufficiently lower than the glass transition temperature Tg.

When the tact time from the previous rotation of the turntable 4 has elapsed, the shutter formed between the circumferential end of the inner casing 6 and the respective processing chambers is opened, and the turntable 4 rotates by a certain angle. Thus, the mold unit 8 is conveyed to the quench portion 48 outside the inner casing 6 in a state of being held by the mold support member 12.

When the mold unit 8 is conveyed to the quenching portion 48, the quenching step is performed. In the quenching portion 48, no heater is provided, and the temperature is the same as that around the apparatus. For this reason, the mold unit 8 and the glass forming body 60 therein are rapidly cooled. The rotation mechanism 14 is not provided in the quenching portion 48. This is because the temperature of the glass formed body 60 in the third centrifugal chamber 32 is cooled to a temperature sufficiently lower than the glass transition temperature Tg This is because the possibility that the glass forming body 60 is deformed in the quenching portion 48 is low.

When the preset tact time elapses from the previous rotation of the turntable 4, the shutter formed between the circumferential end of the inner casing 6 and the respective processing chambers is opened and the turntable 4 rotates by a certain angle. Thus, the mold unit 8 is transported to the exchange unit 50 while being held by the mold support member 12.

When the mold unit 8 is returned to the exchange unit 50, the exchange step is carried out. The shutter of the opening portion 2A of the outer casing 2 is opened when the rotation of the turntable 4 is completed and the mold unit 8 housing the glass molding body after the molding process is completed reaches the exchange portion 50. [ When the shutter of the opening 2A of the outer casing 2 is opened, the mold unit 8 that has undergone the molding process is taken out through the opening 2A. The mold unit 8 containing the new glass material 60 is placed on the turntable 10 of the turntable 4.

The production of the glass compact 60 is completed by the above process.

In the glass molding production apparatus 1 in which the heaters 34, 36, 38, 40, 42, 44 and 46 are formed on both sides of the conveying path as in the present embodiment, Therefore, the heat received from the heaters 34, 36, 38, 40, 42, 44, 46 is different depending on the portion of the mold unit 8, and temperature distribution is likely to occur on the surface of the mold unit 8. On the other hand, in the present embodiment, the control unit 15 determines that the mold unit 8 is rotated 90 degrees relative to the initial relative angular position with respect to the stop time at which the mold unit 8 is stopped at the initial relative- And the rotation mechanism 14 is controlled so that the stopping time at which the stopping is stopped at 270 degrees or longer. Therefore, after the portions located on both sides in the transport direction in the first quenching chamber 20, the second quenching chamber 22 and the crack chamber 24 are heated, the rotating unit 14 rotates the mold unit 8 And is carried into the press chamber 26. Thereby, a portion of the mold unit 8 opposed to the heaters 34, 36, and 38 in the immediately preceding process chamber (the first heat supply chamber 20, the second heat supply chamber 22, and the crack chamber 24) The different portions are arranged to face the heater 40 disposed in the press chamber 26 for a long time. That is, the heaters 34, 36, and 36 of the mold unit 8 in the immediately preceding process chamber (the first quench chamber 20, the second quench chamber 22, and the crack chamber 24) The temperature distribution of the glass material 60 in the mold unit 8 and the mold unit 8 in the pressing step is changed by rotating the mold unit 8 so as to change the relative position with respect to the mold unit 8, Unevenness can be suppressed, and a glass molded article of good quality can be produced.

In the present embodiment, the portions located on both sides in the conveying direction of the press chamber 26 are heated, and then the first, second, and third circulating chambers 28, 30 and 32 A portion of the press chamber 26 which is different from the portion facing the heater 40 is disposed in the first circulation chamber 28, the second circulation chamber 30, and the third circulation chamber 32 44, and 46 which face each other for a long time. That is, the heaters 40, 42, 44, and 44 of the mold unit 8 in the press chamber 26 and the first and second circulation chambers 28, 30, Even if the temperature distribution irregularity occurs in the pressing step, the mold unit 8 and the glass material 8 in the mold unit 8 60 can be suppressed in a state in which the temperature distribution unevenness is suppressed, and a glass molded article of good quality can be produced.

In the present embodiment, since the control unit 15 controls the rotating mechanism 14 to stop at the relative angular position where the mold unit 8 has rotated 90 degrees or 270 degrees from the initial relative angular position, The portion of the heater 40 that receives the most radiant heat from the heater 40 receives the most radiant heat from the heater at the other stage and thus the temperature distribution of the glass material 60 in the mold unit 8 and the mold unit 8 Can be suppressed.

In the present embodiment, the stop time, which is a relative angle position at which the mold unit 8 has rotated 90 degrees from the initial relative angle position, and the stopping time at which the mold unit 8 has rotated 270 degrees from the initial relative angle position, The ratio of the total time of the stopping time, which is the angular position, was set to 60% or more and 85% or less. As a result, the stopping time, which is a relative angle position obtained by rotating 90 degrees or 270 degrees from the initial relative angular position in the processing chamber other than the press chamber 26, is excessively long, whereby the temperature distribution in the mold unit 8 and the glass material 60 It is possible to prevent occurrence of unevenness.

In this embodiment, in each of the processing chambers 20, 22, 24, 28, 30, and 32 other than the press chamber 26, the stopping angular position of the rotating mechanism 14 and the stopping time It is possible to prevent temperature distribution irregularity from occurring in the mold unit 8 and the glass material 60 by controlling the rotation of the rotating mechanism in at least one chamber. In this case, however, it is preferable to control the rotation of the rotating mechanism in the centrifugal chamber.

In the present embodiment, rotation of the rotating mechanism is similarly controlled in each of the processing chambers 20, 22, 24, 28, 30, and 32 other than the press chamber 26. However, The stopping time at the stop angle position and the stop angle position in the processing chamber may be changed.

In the present embodiment, the mold unit 8 is rotated by 90 degrees. However, the present invention is not limited to this. For example, the mold unit 8 may be rotated by 60 degrees or 45 degrees. Even in such a case, it is preferable that the angular position at which the mold unit is taken out from each treatment chamber is the same as the initial relative angular position at which it is carried.

In the present embodiment, the first quench chamber 20, the second quench chamber 22, the crack chamber 24, the press chamber 26, the first centrifugal chamber 28, the second centrifugal chamber 30, And the third centrifugal chamber 32. However, the present invention is not limited to this, and a device in which a plurality of press chambers are formed, or a device in which a centrifugal chamber or a quench chamber is provided with a plurality of The present invention can be applied to an apparatus that is not provided outside the chamber. That is, the present invention can be applied to any apparatus provided with a heating chamber for heating a mold unit, a press chamber for press processing a mold unit, and a cooling chamber for cooling the mold unit.

Hereinafter, the present invention will be described with reference to the drawings.

As shown in Fig. 1, the method for manufacturing a glass molded article of the present invention comprises a turntable 4 for transporting a mold unit 8 having a glass material disposed therein along a predetermined transporting path, The first and second heat-receiving chambers 20 and 22 and the cracking chamber 24 for applying heat treatment to the formed glass material, the press chamber 26 for press-processing the glass material, and the glass material are subjected to a sintering treatment 36, 38, 40, and 40 formed on both sides of the conveyance path of these processing chambers 20, 22, 24, 26, 28, 30, 42, 44, and 46, the glass-forming article manufacturing apparatus 1 is formed in each processing chamber other than the press chamber 26, and the glass- A rotation mechanism 14 for rotating the mold unit 8 intermittently, Heating the glass material by the heaters (34, 36) in the first and second quenching chambers (20, 22), and a control section (15) A pressing step of pressing the glass material while heating the glass material by the heater 40 in the press chamber 26 and a pressing step of pressing the glass material in the first to third cups 28, , And a cooling step of controlling the temperature of the molded body to be pressed by the heaters (42, 44, 46) while lowering the temperature of the molded body. At least one of the quenching step and the heating step intermittently rotates the mold unit (8) The control unit 15 stops the mold unit at a relative angle position different from the initial relative angle position from the stop time at which the mold unit 8 stops at the initial relative angle position with respect to the conveyance path immediately after the mold unit 8 is brought into each processing chamber Stop And controls the rotating mechanism 14 so that the time is lengthened.

1, the apparatus 1 for manufacturing a glass molded article of the present invention comprises a turntable 4 for transporting a mold unit 8 having a glass material disposed therein along a predetermined transport path, First and second quenching chambers 20 and 22 and a cracking chamber 24 for applying heat treatment to the glass material formed along the glass substrate 4 and a press chamber 26 for pressing the glass material, (34, 36) formed on both sides of the conveyance path of these treatment chambers (20, 22, 24, 26, 28, 30, 32) The glass molded body manufacturing apparatus 1 is formed in a treatment chamber other than the press chamber 26 and is intermittently provided in a mold unit (14) for rotating the rotating mechanism (14), and a stay time And the control unit 15 controls the mold unit 8 so that the mold unit is in an initial relative position with respect to the stopping time at the initial relative angle position with respect to the transfer path immediately after the mold unit 8 is loaded into each processing chamber The rotation mechanism 14 is controlled so that the stopping time at which the rotation is stopped at a relative angle position different from the angular position becomes longer.

1: Glass forming body manufacturing apparatus
2: External casing
4: Turntable
6: Internal casing
8: Mold Unit
10: Rotational Plate
12:
14:
15:
20: First quenching chamber
22: the second quenching chamber
24: crack room
26: Press room
28: 1st standing room
30: 2nd standing room
32: The third standing room
34, 36, 38, 40, 42, 44, 46: heater
45: Support
47: Press mechanism
48:
50:
52: Mold
54:
56: Lower Type
58: Body type
60: Glass material (glass molded article)

Claims (11)

A conveying mechanism for conveying the mold unit in which the glass material is disposed along a predetermined conveying path,
A heating chamber for applying heat treatment to the glass material formed along the conveyance path, a press chamber for performing press treatment for the glass material, and a cold room for applying a cold treatment to the glass material,
A method for manufacturing a glass molded article by a manufacturing apparatus for a glass molded article provided with the heating chamber, the press chamber, and the heater formed on both sides of the conveyance path of the circulation chamber,
The apparatus for producing a glass molded article includes a rotating mechanism which is formed on at least one of the centrifugal chamber and the heating chamber and which intermittently rotates the mold unit,
And a control unit for controlling a stopping time at the stop angle position and the stop angle position of the rotating mechanism,
A heating step of heating the glass material by the heater in the heating chamber;
A press step of performing press processing on the glass material while heating the glass material by the heater in the press chamber;
And a cooling step of lowering the temperature of the pressed body by the heater while lowering the temperature,
Wherein the mold unit is intermittently rotated by the rotating mechanism in at least one of the serration step and the heating step,
Wherein the control unit determines that the mold unit is at the initial relative angle position with respect to the stopping time at the initial relative angle position with respect to the conveyance path immediately after the mold unit is brought into the chamber of at least one of the circulating chamber or the heating chamber Controls the rotating mechanism to make the stopping time at a different relative angular position different from the stopping time,
The control unit stops the longest time stop at the relative angular position rotated 90 degrees or 270 degrees from the initial relative angular position until the mold unit is carried in and out of at least one of the chambers And the rotation mechanism is controlled to rotate the rotation mechanism. delete The method according to claim 1,
Wherein the control unit is stopped at a stop time at which the mold unit is stopped at a relative angle position rotated by 90 degrees from the initial relative angle position and at a relative angle position where the mold unit is rotated 270 degrees from the initial relative angle position Wherein the rotating mechanism is controlled so that the stopping times become equal to each other. The method according to claim 1 or 3,
Wherein the transport mechanism has a turntable,
Wherein the heating chamber, the press chamber, and the quenching chamber are disposed along the circumference on the turntable. The method according to claim 1,
Wherein the mold unit is rotated in both the quenching step and the heating step. 6. The method of claim 5,
Which is a relative angle position in which the mold unit is rotated 90 degrees from the initial relative angular position with respect to a tact time which is a time until the mold unit is brought into and taken out of the at least one chamber, Wherein the ratio of the total time of the stopping time, which is the relative angular position rotated 270 degrees from the position, is 60% or more and 85% or less. The method according to claim 1,
Wherein the mold unit has a mold having a molding surface corresponding to the shape of the glass formed body and a mold supporting member for holding the mold. The method according to claim 1,
The transport mechanism has a turntable with an opening,
The mold unit is placed on the turntable so as to extend over the opening and transported,
Wherein the rotating mechanism has an axis of rotation which is disposed below the turntable and is extendable in the vertical direction and is rotatable about a central axis. A conveying mechanism for conveying the mold unit in which the glass material is disposed along a predetermined conveying path,
A heating chamber for heating the glass material, a press chamber for press-processing the glass material, a cooling chamber for performing a cooling treatment on the green body,
And a heater formed on both sides of the conveyance path of the heating chamber, the press chamber, and the circulation chamber,
In addition, the apparatus for producing a glass molded body may further include a rotation mechanism formed in the chamber of at least one of the centrifugal chamber and the heating chamber, for intermittently rotating the mold unit,
And a control unit for controlling a stay time at a stop angle position and a stop angle position of the rotating mechanism,
Wherein the control unit controls the mold unit so that the mold unit is different from the initial relative angle position with respect to the stopping time at which the mold unit is stopped at the initial relative angle position with respect to the conveying path immediately after the mold unit is brought into the chamber of at least one of the centrifugal chamber or the heating chamber Controls the rotating mechanism to make the stopping time at the relative angular position longer,
The control unit stops the longest time stop at the relative angular position rotated 90 degrees or 270 degrees from the initial relative angular position until the mold unit is carried in and out of at least one of the chambers Wherein the rotating mechanism is controlled to rotate the rotating mechanism. 10. The method of claim 9,
Wherein the mold unit has a molding die having a molding surface corresponding to the shape of the glass formed body and a die supporting member for holding the molding die. 11. The method according to claim 9 or 10,
The transport mechanism has a turntable with an opening,
The mold unit is placed on the turntable so as to extend over the opening and transported,
Wherein the rotating mechanism has a rotation axis disposed below the turntable and capable of extending in a vertical direction and capable of rotating about a central axis.

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