JP2007223834A - Method of manufacturing glass body of rotation, apparatus therefor and the glass body of rotation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain a large glass body of rotation without exclusively depending on surface tension, by rotating a molding container containing a glass gob so that the glass gob rolls therein by its own weight and centrifugal force. <P>SOLUTION: An apparatus 1 for manufacturing the glass body of rotation molds the softened glass gob 2 into a body of rotation and is equipped with the molding container 4 containing the glass gob 2, a driving mechanism 7 which rotates the molding container 4 around its axis 5 of rotation and a pressing member 22 which makes the glass gob 2 roll inside the molding container 4 and presses the rolling glass gob 2. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a glass rotating body manufacturing method and apparatus for obtaining a spherical glass rotating body by rolling a softened glass lump in a rotating forming container, and a glass rotating body.

2. Description of the Related Art Conventionally, a technique for forming a glass lens used for an optical device into a predetermined shape by a forming means has been disclosed. For example, Patent Document 1 discloses that a volume-controlled glass material is placed on a base, the glass material is heated to be softened and deformed, and spheroidized by surface tension. Patent Document 2 discloses that a glass lump is heated and softened and the glass lump is made spherical by surface tension.
JP-A-11-199250 (page 3, FIG. 1) Japanese Examined Patent Publication No. 4-43851 (page 3, Fig. 1)

  However, in the techniques disclosed in Patent Document 1 and Patent Document 2, since the glass lump was spheroidized because it relied only on the surface tension of the molten glass lump, for example, the diameter Φ had only a minute diameter of about 1 mm, A beautiful spherical shape could not be obtained.

  That is, in the conventional method for producing a glass rotating body, the obtained glass rotating body is limited to a small diameter, and with a larger diameter, only a roughly spherical shape whose shape has collapsed due to its own weight can be obtained. For example, it has been difficult to obtain a clean spherical shape having a diameter Φ of about 10 mm.

  This is because in the prior art, when heating a glass lump with a large diameter, it is softened to a viscosity that can be spheroidized by surface tension. ) Occurs.

  The present invention has been made to solve such a problem. The object of the present invention is to rotate the glass lump by its own weight and centrifugal force and friction between the glass lump and the forming container. A method and apparatus for manufacturing a glass rotating body and a glass rotating body capable of moving and applying a pressing force to obtain a large-sized glass rotating body without folding without relying solely on surface tension and rolling operation It is to provide.

In order to achieve the object, the invention according to claim 1
A glass rotating body manufacturing apparatus for forming a softened glass lump into a rotating body,
A molded container containing the glass mass;
A drive mechanism for rotating the molded container about its rotational axis;
And a pressing member that rolls the glass lump in the molding container and presses the rolling glass lump.

The invention according to claim 2 is the glass rotating body manufacturing apparatus according to claim 1,
The rotating shaft is arranged to be inclined with respect to the direction of gravity.
The invention according to claim 3 is the glass rotating body manufacturing apparatus according to claim 1 or 2,
The pressing member is rotatably supported by a frictional force of a contact surface with the glass block.

The invention according to claim 4 is the glass rotating body manufacturing apparatus according to claim 1 or 2,
The pressing member is pivotally supported by the frictional force of the contact surface with the glass lump so as not to rotate.

The invention according to claim 5 is the glass rotating body manufacturing apparatus according to any one of claims 1 to 4,
The pressing member applies a pressing force to the glass block from at least one of a rotation axis direction of the forming container, a direction substantially orthogonal to the rotation axis direction, or a gravity direction.

The invention according to claim 6
A method for producing a rotating glass body that forms a softened glass lump into a rotating body,
The molding container containing the glass lump is rotated to cause the glass lump to roll under the action of its own weight, centrifugal force, and frictional force between the glass lump and the forming container, and the pressing member against the rolling glass lump. Is formed into a rotating body.

The invention according to claim 7 is the method of manufacturing a glass rotating body according to claim 6,
The molding container is rotated by a rotation shaft arranged to be inclined with respect to the direction of gravity.

The invention according to claim 8 is the method of manufacturing a glass rotating body according to claim 6 or 7,
The pressing member is arranged to be rotatable by a frictional force of a contact surface with the glass block.

The invention according to claim 9 is the method for producing a rotating glass body according to claim 6 or 7,
The pressing member is pivotally supported by the frictional force of the contact surface with the glass lump so as not to rotate.

The invention according to claim 10 is the method for producing a glass rotating body according to any one of claims 6 to 9,
The pressing member applies a pressing force to the glass block from at least one of a rotation axis direction of the forming container, a direction substantially orthogonal to the rotation axis direction, or a gravity direction.

  The invention according to claim 11 is a rotating glass body manufactured by the manufacturing method according to any one of claims 6 to 10.

  According to the present invention, the viscosity of the glass lump is relatively lowered by rolling the glass lump in the forming container by the action of its own weight and centrifugal force and the frictional force between the glass lump and the forming container and applying a pressing force. Even if it is high, it is possible to obtain a glass rotating body having a large size without folding without relying only on surface tension and rolling operation.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Overall configuration explanation)
FIG. 1 is an external view of a glass rotating body manufacturing apparatus 1 according to this embodiment.

  In this figure, this manufacturing apparatus 1 includes a heating furnace 3 as a heating means for heating a glass lump 2, a molded container 4 for storing the heated glass lump 2, and the molded container 4 around its rotating shaft 5. As a drive mechanism 7 and a control unit 20 for controlling the rotation speed of the molding container 4 and the like. The heating furnace 3 includes a furnace wall 8 that covers the heating chamber, and a heater 9 disposed in the furnace wall 8.

  Further, the bottom surface of the furnace wall 8 has a chute 10 for placing the glass lump 2. The chute 10 is inclined in the direction of arrow A by the action of the transport mechanism 11, and the heated glass lump 2 is formed into a forming container. 4 is supplied. The control unit 20 can control the heating temperature of the heating furnace 3 and the molding container 4 and can arbitrarily change the rotation speed of the molding container 4 by the drive mechanism 7.

  In this embodiment, the molded container 4 has a bottomed cylindrical shape having an opening 13 having one end opened, and the glass lump 2 is supplied from the opening 13. The corner portion (corner portion) of the bottom wall of the forming container 4 is formed in a substantially arc shape (R shape) in cross section so that the glass lump 2 is formed into a substantially spherical glass rotating body. The R shape of the corner can be appropriately selected according to the target rotating body. Around the molding container 4, a heater 12 is disposed as a heating means for heating the molding container 4.

  Moreover, as for the shaping | molding container 4, the rotating shaft 5 inclines with respect to the perpendicular direction, and is arrange | positioned. In the present embodiment, the rotation axis 5 is set at an inclination angle of 5 to 85 degrees with respect to the vertical direction so that the glass lump 2 is stably formed at the corner (corner part) of the forming container 4. Yes. Thus, the reason why the rotating shaft 5 is inclined with respect to the vertical direction is that the glass lump 2 always tries to move to the lowest part of the corner (corner part) of the bottom wall of the molded container 4 due to its own weight. Because.

  On the other hand, since the molding container 4 rotates at a predetermined speed around the rotation shaft 5, the glass lump 2 moves to the lowest part of the corner (corner) of the bottom wall while moving to the corner of the bottom wall. Roll while touching. And by this rolling, the glass lump 2 is shape | molded by the substantially spherical glass rotary body.

In the present embodiment, the case where the bottomed cylindrical container is used as the molded container 4 has been described. However, the present invention is not limited to this. For example, a container having a bottom wall that is substantially hemispherical may be used.
The drive mechanism 7 includes a driven gear 14 that is integrally fixed to the rotary shaft 5 of the molding container 4, a drive gear 15 that meshes with the driven gear 14, and an electric motor 16 that drives the drive gear 15. ing.

  In the present embodiment, the glass lump 2 may be heated and softened in advance and then supplied into the forming container 4, or the glass lump 2 may be supplied into the forming container 4 and then heat softened. Alternatively, the glass lump 2 may be supplied into the molding container 4 and the glass lump 2 may be softened by heating while rotating the molding container 4.

  The control unit 20 can arbitrarily change the rotation speed after the glass lump 2 is put into the molding container 4. For example, stable molding can be performed in a short time by increasing or decreasing the rotational speed of the molding container 4 according to the shape of the glass lump 2. In addition, it is good to shape | mold, heating with an electrical resistance heating, high frequency induction heating, a lamp heater, a gas burner etc. as an auxiliary heating source so that the glass lump 2 during shaping | molding may not be cooled.

  Moreover, in this Embodiment, as the shape of the glass lump 2 before a heating, the thing of the shape of a polygonal column, a cylinder, a substantially spherical body, or a gob (gob) is used, for example. And in the heating furnace 3, the glass lump 2 is heat-softened to the temperature before becoming liquid. If the glass lump 2 is heated until it becomes liquid, the glass lump 2 is fused with the forming container 4 and it becomes difficult to roll the glass lump 2 to form a spherical glass rotating body. It is.

Moreover, it is desirable to heat the glass lump 2 in the heating furnace 3 to a temperature before it becomes liquid so that its viscosity becomes 10 ⁴ to 10 ¹² poise. The viscosity of 10 ⁴ poise is slightly lower (softer) than the pour point of glass (10 ⁵ poise), and the viscosity of 10 ¹² poise is lower than the glass transition point (10 ¹³ to 10 ¹⁵ poise). The viscosity is a little low (soft).

The glass viscosity of 10 ⁴ poise is a value lower than the pour point of the glass, but is higher than the viscosity of the molten glass from 10 ¹ to 10 ³ poise. It is clearly distinguished from the molten state. Further, the temperature of the molding container 4 during molding is preferably lower than the heating temperature of the glass lump 2. This is because, when the temperature of the molding container 4 is higher than the heating temperature of the glass lump 2, fusion or the like may occur between the glass lump 2 and the molding container 4.

Furthermore, in this Embodiment, the pressing member which presses the glass lump 2 currently rolling within the shaping | molding container 4 is provided.
That is, as shown in FIG. 1, the pressing member 22 is suspended and supported by the pressing mechanism 24 via the support shaft 23. By bringing the pressing member 22 into contact with the rolling glass lump 2, it can be formed into a substantially spherical rotating body even if the viscosity of the glass lump 2 is relatively high.

  Moreover, in the present embodiment, the viscosity of the glass lump 2 is relatively high and the pressing member 22 is brought into contact with the glass lump 2, so that the glass lump 2 to be molded is so-called folded (by frictional force with the mold, No “scratch layer” is generated on the surface of the glass lump 2. On the other hand, if the glass lump 2 is molded only for surface tension and rolling operation in a state where the glass lump 2 is too soft, the glass lump 2 is likely to be folded.

Below, the shape of the pressing member 22 and the support method will be described separately for each embodiment. In addition, the same code | symbol is attached | subjected to the member which is the same or it corresponds through all the embodiments. Moreover, although the shape immediately after heat softening and the shape after shaping | molding differ, the glass lump 2 attaches | subjects the same code | symbol for convenience of explanation.
(First embodiment)
FIG. 2 shows a main configuration of the first embodiment. In this embodiment, a substantially spherical recess 25 is formed on the pressing member 22 on the contact surface side with the glass block 2. And this recessed part 25 is contacting the glass lump 2. As a result, the molding container 4 rotates about the rotation axis 5 inclined at approximately 45 ° with respect to the direction of gravity, and the glass lump 2 rolls while contacting the corner (corner part) of the bottom wall of the molding container 4. To do. Then, the pressing member 22 presses the glass lump 2 against the rolling glass lump 2.

  At this time, the pressing member 22 is from at least one of the axial direction (I direction) of the rotating shaft 5 of the molding container 4, the direction substantially perpendicular to the rotating shaft direction (II direction), or the direction of gravity (III direction). The glass lump 2 is brought into contact with and pressed. Moreover, it can also press from an inclination direction combining several press directions.

  The pressing force at this time can be selected to a magnitude that does not hinder rolling due to the viscosity, size, rolling speed, etc. of the glass lump 2. Thus, the glass lump 2 is formed into a substantially spherical rotating body even if the viscosity is relatively high by the rolling and the pressing force from the pressing member 22. And since the viscosity of the glass lump 2 is comparatively high and the press member 22 is made to contact, what is called folding does not arise in the glass lump 2 shape | molded.

  In this embodiment, the pressing member 22 is pivotally supported by the support shaft 23 so as not to rotate due to the frictional force of the contact surface with the glass lump 2. For this reason, the pressing member 22 is only in contact with the glass block 2 with a predetermined pressing force.

According to this embodiment, the glass lump 2 is rolled in the molding container 4 by the action of its own weight and centrifugal force and the frictional force between the glass lump and the molding container, and the rolling glass lump 2 is further pressed by the pressing member. By pressing at 22, it is possible to obtain a glass rotating body having a large size without folding without relying solely on surface tension and rolling operation.
(Second Embodiment)
FIG. 3 shows a main configuration of the second embodiment. In this embodiment, the pressing member 22 has a substantially spherical concave portion 25 formed on the contact surface side with the glass lump 2, and the concave portion 25 is in contact with the glass lump 2. As a result, the forming container 4 rotates around the rotation shaft 5 inclined at about 45 ° with respect to the direction of gravity, and the glass lump 2 rolls while contacting the corner of the bottom wall of the forming container 4. Then, the pressing member 22 applies a predetermined pressing force to the glass lump 2 with respect to the rolling glass lump 2.

  At this time, since the rotating shaft 5 of the molding container 4 is inclined at approximately 45 °, the glass lump 2 rotates about an axis that is substantially horizontal. In this way, the pressing member 22 contacts in a direction substantially orthogonal to the rotation axis of the glass lump 2, and the glass lump 2 faces the corner (corner portion) of the bottom wall of the molding container 4 and the pressing member 22. Since the pressure is applied, a rotating body with a good sphericity with little bias can be obtained.

  That is, the pressing member 22 comes into contact with and presses the glass lump 2 in the gravitational direction (III direction). The pressing force at this time can be selected to a magnitude that does not hinder rolling due to the viscosity, size, rolling speed, etc. of the glass lump 2. Thus, the glass lump 2 is formed into a substantially spherical rotating body even if the viscosity is relatively high by the rolling and the pressing force from the pressing member 22. And since the viscosity of the glass lump 2 is comparatively high and the press member 22 is made to contact, what is called folding does not arise in the glass lump 2 shape | molded.

  In this embodiment, as in the first embodiment, the pressing member 22 is pivotally supported by the support shaft 23 so as not to rotate due to the frictional force of the contact surface with the glass lump 2. For this reason, the pressing member 22 is only in contact with the glass block 2 with a predetermined pressing force.

According to this embodiment, the glass lump 2 is rolled in the molding container 4 by the action of its own weight and centrifugal force and the frictional force between the glass lump and the molding container, and the rolling glass lump 2 is further pressed by the pressing member. By pressing at 22, it is possible to obtain a glass rotating body having a large size without folding without relying solely on surface tension and rolling operation.
(Third embodiment)
FIG. 4 shows a main configuration of the third embodiment. In this embodiment, the pressing member 22 has a roller shape, and a concave surface 26 having a substantially arc-shaped cross section (R shape) is formed along the circumferential direction. The glass block 2 comes into contact with the concave surface 26. Thus, the forming container 4 rotates around the rotation shaft 5 inclined at about 45 ° with respect to the direction of gravity, and the glass lump 2 rolls while contacting the corner of the bottom wall of the forming container 4. At this time, the pressing member 22 applies a predetermined pressing force to the glass lump 2 with respect to the rolling glass lump 2.

  At this time, the pressing member 22 is made of glass from at least one of the axial direction (I direction) of the rotating shaft 5 of the molding container 4, the direction substantially perpendicular to the rotating shaft direction (II direction), or the gravity direction (III direction). The lump 2 is brought into contact with and pressed. Moreover, it can also press from an inclination direction combining several press directions.

  The pressing force at this time can be selected to a magnitude that does not hinder rolling due to the viscosity, size, rolling speed, etc. of the glass lump 2. Thus, the glass lump 2 is formed into a substantially spherical rotating body even if the viscosity is relatively high by the rolling and the pressing force from the pressing member 22. And since the viscosity of the glass lump 2 is comparatively high and the press member 22 is made to contact, what is called folding does not arise in the glass lump 2 shape | molded.

  In this embodiment, the pressing member 22 is pivotally supported on the support shaft 23 so as to be rotatable by the frictional force of the contact portion with the glass lump 2. That is, when the glass lump 2 rolls, the pressing member 22 in contact with the glass lump 2 is rotated by the frictional force received from the glass lump 2. For this reason, the pressing member 22 does not prevent the glass lump 2 from rolling.

According to this embodiment, the glass lump 2 is rolled in the molding container 4 by the action of its own weight and centrifugal force and the frictional force between the glass lump and the molding container, and the rolling glass lump 2 is further pressed by the pressing member. By pressing at 22, it is possible to obtain a glass rotating body having a large size without folding without relying solely on surface tension and rolling operation.
(Fourth embodiment)
FIG. 5 shows a main configuration of the fourth embodiment. In this embodiment, the pressing member 22 has a pulley shape in which a circular groove 27 is formed on the outer periphery, and the pressing member 22 is rotatably supported by the support frame 28. The glass lump 2 comes into contact with the round groove 27. Thus, the forming container 4 rotates around the rotation shaft 5 inclined at about 45 ° with respect to the direction of gravity, and the glass lump 2 rolls while contacting the corner of the bottom wall of the forming container 4. At this time, the pressing member 22 applies a predetermined pressing force to the glass lump 2 with respect to the rolling glass lump 2.

  At this time, the pressing member 22 contacts in a direction substantially orthogonal to the rotation axis (substantially horizontal axis) of the glass lump 2, and the glass lump 2 contacts the corner (corner portion) of the bottom wall of the forming container 4 and the pressing member 22. Since the pressure is applied in the directly facing direction, a rotating body with a good sphericity with little bias can be obtained.

  That is, in this embodiment, the pressing member 22 comes into contact with and presses the glass lump 2 from the direction of gravity (III direction). The pressing force at this time can be selected to a magnitude that does not hinder rolling due to the viscosity, size, rolling speed, etc. of the glass lump 2. Thus, the glass lump 2 is formed into a substantially spherical rotating body even if the viscosity is relatively high by the rolling and the pressing force from the pressing member 22. And since the viscosity of the glass lump 2 is comparatively high and the press member 22 is made to contact, what is called folding does not arise in the glass lump 2 shape | molded.

  In the present embodiment, the pressing member 22 is pivotally supported on the support shaft 23 via the support frame 28 so as to be rotatable by the frictional force of the contact portion with the glass lump 2. That is, when the glass lump 2 rolls, the pressing member 22 in contact with the glass lump 2 is rotated by the frictional force received from the glass lump 2. For this reason, the pressing member 22 does not prevent the glass lump 2 from rolling.

According to this embodiment, the glass lump 2 is rolled in the molding container 4 by the action of its own weight and centrifugal force and the frictional force between the glass lump and the molding container, and the rolling glass lump 2 is further pressed by the pressing member. By pressing at 22, it is possible to obtain a glass rotating body having a large size without folding without relying solely on surface tension and rolling operation.
(Fifth embodiment)
6 and 7 (a) and 7 (b) show the main configuration of the fifth embodiment. In this embodiment, two disk-shaped pressing members 22 and 22 are rotatably supported by a support member 29 by pins 30. The two pressing members 22 (end surfaces thereof) are in contact with the glass lump 2.

  Thus, the molding container 4 rotates around the rotation shaft 5 inclined at about 45 ° with respect to the direction of gravity, and the glass lump 2 rolls while contacting the corner of the bottom wall of the molding container 4. At this time, the two pressing members 22 apply a predetermined pressing force to the glass lump 2 with respect to the rolling glass lump 2. Thus, in this embodiment, it is possible to cope with the complicated rotation direction of the glass lump 2 by providing two rotatable disk-like pressing members 22 and 22.

  At this time, the pressing member 22 comes into contact with and presses the glass lump 2 from the gravity direction (III direction). The pressing force at this time can be selected to a magnitude that does not hinder rolling due to the viscosity, size, rolling speed, etc. of the glass lump 2. Thus, the glass lump 2 is formed into a substantially spherical rotating body by the rolling and pressing force from the pressing member 22 even if the viscosity is relatively high. And since the viscosity of the glass lump 2 is comparatively high and the press member 22 is made to contact, what is called folding does not arise in the glass lump 2 shape | molded.

  In the present embodiment, the pressing member 22 is pivotally supported on the support shaft 23 so as to be rotatable by the frictional force of the contact portion with the glass lump 2. That is, when the glass lump 2 rolls, the pressing member 22 in contact with the glass lump 2 is rotated by the frictional force received from the glass lump 2. For this reason, the pressing member 22 does not prevent the glass lump 2 from rolling.

According to this embodiment, the glass lump 2 is rolled in the molding container 4 by the action of its own weight and centrifugal force and the frictional force between the glass lump and the molding container, and the rolling glass lump 2 is further pressed by the pressing member. By pressing at 22, it is possible to obtain a glass rotating body having a large size without folding without relying solely on surface tension and rolling operation.
(Sixth embodiment)
8 and 9 show a sixth embodiment. In this embodiment, the ring-shaped molded container 4 is rotatably supported by the four drive rollers 31 on the outer peripheral side. That is, the molding container 4 is rotated in the arrow direction (clockwise) by driving the four drive rollers 31 arranged on the outer peripheral side in the arrow direction (counterclockwise). A V-shaped groove 32 is formed on the inner surface of the molded container 4.

  And the glass lump 2 is mounted in this V-shaped groove | channel 32, and the pulley-shaped press member 22 in which the round groove 27 was formed is contact | abutted so that this glass lump 2 may be pinched | interposed from the upper and lower sides. The pressing member 22 is rotatably supported on a substantially horizontal support shaft 23. Thus, for example, when the forming container 4 rotates in the arrow direction (clockwise) of FIG. 8, the glass lump 2 rolls while contacting the V-shaped groove 32 of the forming container 4. At this time, the pressing member 22 comes into contact with the rolling glass lump 2 to apply a pressing force to the glass lump 2.

  That is, in this embodiment, the pressing member 22 comes into contact with and presses the glass lump 2 from the gravity direction (III direction). The pressing force at this time can be selected to a magnitude that does not hinder rolling due to the viscosity, size, rolling speed, etc. of the glass lump 2. Thus, the glass lump 2 is formed into a substantially spherical rotating body even if the viscosity is relatively high by the rolling and the pressing force from the pressing member 22. And since the viscosity of the glass lump 2 is comparatively high and the press member 22 is made to contact, what is called folding does not arise in the glass lump 2 shape | molded.

  In this embodiment, the pressing member 22 is pivotally supported on the support shaft 23 so as to be rotatable by the frictional force of the contact portion with the glass lump 2. For example, in FIG. 8, when the glass lump 2 rolls in the clockwise direction, the pressing member 22 in contact with the glass lump 2 rotates in the arrow direction (counterclockwise direction) in the figure by the frictional force received from the glass lump 2. ing. For this reason, the pressing member 22 does not prevent the glass lump 2 from rolling.

  According to this embodiment, the glass lump 2 is rolled in the molding container 4 by the action of its own weight and centrifugal force and the frictional force between the glass lump and the molding container, and the rolling glass lump 2 is further pressed by the pressing member. By pressing at 22, it is possible to obtain a glass rotating body having a large size without folding without relying solely on surface tension and rolling operation.

It is a figure which shows the whole structure of the manufacturing apparatus of a glass rotary body. It is a principal part cutting front view of the manufacturing apparatus of the glass rotary body of 1st Embodiment. It is a principal part cutting front view of the manufacturing apparatus of the glass rotary body of 2nd Embodiment. It is a principal part cutting front view of the manufacturing apparatus of the glass rotary body of 3rd Embodiment. It is a principal part cross-sectional front view of the manufacturing apparatus of the glass rotary body of 4th Embodiment. It is a principal part sectional front view of the manufacturing apparatus of the glass rotary body of 5th Embodiment. (A) is the principal part enlarged front view same as the above, (b) is the side view. It is a principal part cutting front view of the manufacturing apparatus of the glass rotary body of 6th Embodiment. It is a side view same as the above.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Glass rotating body manufacturing apparatus 2 Glass lump 3 Heating furnace 4 Molding container 5 Rotating shaft 7 Drive mechanism 9 Heater 12 Heater 13 Opening part 14 Driven gear 15 Drive gear 16 Electric motor 20 Control part 22 Press member 23 Support shaft 24 Press mechanism 25 concave portion 26 concave surface 27 round groove 28 support frame 29 support member 31 drive roller 32 V-shaped groove

Claims (11)

A glass rotating body manufacturing apparatus for forming a softened glass lump into a rotating body,
A molded container containing the glass mass;
A drive mechanism for rotating the molded container about its rotational axis;
A rolling member that rolls the glass lump in the molding container, and a pressing member that presses the rolling glass lump.
An apparatus for producing a rotating glass body. The rotation axis is arranged to be inclined with respect to the direction of gravity.
The manufacturing apparatus of the glass rotary body of Claim 1 characterized by the above-mentioned. The pressing member is rotatably supported by the frictional force of the contact surface with the glass block,
The manufacturing apparatus of the glass rotary body of Claim 1 or 2 characterized by the above-mentioned. The pressing member is rotatably supported by the frictional force of the contact surface with the glass block,
The manufacturing apparatus of the glass rotary body of Claim 1 or 2 characterized by the above-mentioned. The pressing member applies a pressing force to the glass block from at least one direction of the rotation axis direction of the molding container, the direction substantially perpendicular to the rotation axis direction, or the direction of gravity.
The manufacturing apparatus of the glass rotary body in any one of Claims 1-4 characterized by the above-mentioned. A method for producing a rotating glass body that forms a softened glass lump into a rotating body,
The molding container containing the glass lump is rotated to cause the glass lump to roll under the action of its own weight, centrifugal force, and frictional force between the glass lump and the forming container, and the pressing member against the rolling glass lump. To form a rotating body,
The manufacturing method of the glass rotary body characterized by the above-mentioned. The molded container is rotated by a rotation shaft arranged to be inclined with respect to the direction of gravity.
The manufacturing method of the glass rotary body of Claim 6 characterized by the above-mentioned. The pressing member is rotatably arranged by the frictional force of the contact surface with the glass block,
The manufacturing method of the glass rotary body of Claim 6 or 7 characterized by the above-mentioned. The pressing member is rotatably supported by the frictional force of the contact surface with the glass block,
The manufacturing method of the glass rotary body of Claim 6 or 7 characterized by the above-mentioned. The pressing member applies a pressing force to the glass block from at least one direction of a rotation axis direction of the molding container, a direction substantially orthogonal to the rotation axis direction, or a gravitational direction.
The manufacturing method of the glass rotary body in any one of Claims 6-9 characterized by the above-mentioned.   A glass rotating body manufactured by the manufacturing method according to claim 6.