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US 12,129,200 B2Granted
Molten glass cutting apparatus and glass product manufacturing apparatus
AssigneeNihon Taisanbin Kogyou Kabushiki Kaisha
InventorsMikio Ikarashi, Toshinobu Hotta
Life of this patent
Estimating the term…
Abstract
A molten glass cutting apparatus comprises a pair of shear blades and a control unit that controls a pair of the shear blades to relatively move toward each other. The control unit controls a pair of the shear blades to relatively move so that tip parts of a pair of the shear blades overlap, and shearing force by cutting edges of a pair of the shear blade cuts molten glass extruded from an orifice formed at a bottom part of a spout. When a central part of molten glass is offset with respect to a central axis of the orifice, the control unit offsets a position of cutting by a pair of the cutting edges to a side of the central part with respect to the central axis.
Claims13
A molten glass cutting apparatus comprising:
- a first shear blade that includes a first cutting edge;
- a second shear blade that includes a second cutting edge;
- and
- a control unit that controls the first shear blade and the second shear blade to relatively move toward each other,
- wherein the first shear blade and the second shear blade are disposed below a spout that stores molten glass and has an orifice at a bottom of the spout, and above a funnel, and
- the control unit controls the first shear blade and the second shear blade to relatively move until, the first cutting edge and the second cutting edge are at a cutting position at which the first cutting edge and the second cutting edge cut a portion of a molten glass extruded from the orifice;
- and
- the control unit is configured such that when a center of the portion of the molten glass at a predetermined position between the orifice and the funnel is offset in a moving direction at least one of the first shear blade and the second shear blade with respect to a central axis of the orifice, the control unit calculates an offset amount of the center with respect to the central axis, and offsets, the first cutting edge and the second cutting edge by the offset amount in the moving direction with respect to the central axis to align the cutting position with the center.
5 more elements
A molten glass cutting apparatus comprising:
- a first shear blade that includes a first cutting edge and a first base end that is opposite from the first cutting edge;
- a second shear blade that includes a second cutting edge and a second base end that is opposite from the second cutting edge;
- a third shear blade that includes a third cutting edge and a third base end that is opposite from the third cutting edge;
- a fourth shear blade that includes a fourth cutting edge and a fourth base end that is opposite from the fourth cutting edge:
- a first movable member to which the first base end and the third base end are attached;
- a second movable member to which the second base end and the fourth base end are attached;
- and
- a control unit that controls the first shear blade and the second shear blade to relatively move toward each other, and the third shear blade and the fourth shear blade to relatively move toward each other,
- wherein
- the first shear blade, the second shear blade, the third shear blade, and the fourth shear blade are disposed below a spout that stores molten glass and has a first orifice and a second orifice at a bottom of the spout, and above a first funnel and a second funnel, and
- the control unit controls the first movable member and the second movable member to relatively move the first shear blade and the second shear blade until the first cutting edge and the second cutting edge are at a first cutting position at which the first cutting edge and the second cutting edge cut a first portion of a molten glass extruded from the first orifice, and to relatively move the third shear blade and the fourth shear blade until the third cutting edge and the fourth cutting edge are at a second cutting position at which the third cutting edge and the fourth cutting edge cut a second portion of a molten glass extruded from the second orifice;
- and
- the control unit is configured such that when at least one of a center of the first portion of the molten glass at a first predetermined position between the first orifice and the first funnel and a center of the second portion of the molten glass at a second predetermined position between the second orifice and the second funnel is offset with respect to a central axis of a corresponding one of the first orifice and the second orifice, the control unit calculates an offset amount of the at least one of the center of the first portion and the center of the second portion with respect to the central axis, and controls the first movable member and the second movable member to offset the first cutting edge, the second cutting edge, the third cutting edge, and the fourth cutting edge by the offset amount with respect to the central axis to align the first cutting position with the center of the first portion and the second cutting position with the center of the second portion.
10 more elements
A molten glass cutting apparatus comprising:
- a first shear blade that includes a first cutting edge that is concave;
- a second shear blade that includes a second cutting edge that is concave;
- the first shear blade and the second shear blade are disposed below a spout that stores molten glass and has an orifice at a bottom of the spout, and above a funnel;
- and
- a control unit that controls the first shear blade and the second shear blade to relatively move toward each other until the first cutting edge and the second cutting edge are at a cutting position at which the first cutting edge and the second cutting edge cut a portion of the molten glass extruded from the orifice,
- wherein the first cutting edge and the second cutting edge are opposite each other with a center of the first cutting edge in a width direction of the first shear blade and a center of the second cutting edge in a width direction of the second shear blade being farthest away from each other, and
- wherein the control unit is configured such that when a center of the portion of the molten glass at a predetermined position between the orifice and the funnel is offset in a moving direction of at least one of the first shear blade and the second shear blade with respect to a central axis of the orifice, the control unit calculates an offset amount of the center.
4 more elements
Dependencies are inferred from the claim text.