JP5636172B2 - Glass forming apparatus and tempered glass manufacturing apparatus - Google Patents

Description

  The present invention relates to a glass forming apparatus for forming glass into a predetermined shape and a tempered glass manufacturing apparatus using the glass forming apparatus.

  For example, a glass bent into a predetermined shape is used as a window glass used in a vehicle. A molding apparatus for molding glass into a predetermined shape and a tempered glass manufacturing apparatus for obtaining tempered glass by cooling glass molded by such a molding apparatus have been proposed (for example, Patent Document 1 (FIG. 1). )reference.).

Patent document 1 is demonstrated based on the following figure.
As shown in FIG. 8, a glass manufacturing apparatus 100 includes a conveyance path 102 for glass 101, a heating furnace 103 provided on the conveyance path 102 for heating the glass 101, and a heating furnace 103 provided downstream of the heating furnace 103. And a cooling device 105 for cooling the glass 101 disposed and formed downstream of the molding device 104.

  The forming apparatus 104 includes a forming ring 107 that supports the glass 101 heated by the heating furnace 103, and a forming die 108 that forms the glass 101 into a predetermined shape by pressing the glass 101 supported by the forming ring 107. .

  The tempered glass 109 can be obtained by rapidly cooling the glass 101 formed by such a forming device 104 by the cooling device 105.

By the way, according to such a shaping | molding apparatus 104, while the glass 101 is mounted on the shaping | molding ring 107, the temperature of the glass 101 falls. If the temperature when transported to the cooling device 105 is too low, the quality of the tempered glass 109 is lowered.
On the other hand, if the temperature in the heating furnace 103 is increased in anticipation of a decrease in temperature, the glass 101 is bent more than necessary due to its own weight.
These tendencies are particularly noticeable with thin glass (glass of 3.1 mm or less).

  It is desired to provide a technique capable of keeping the temperature of glass at an appropriate temperature during glass forming.

JP 10-152333 A

  This invention makes it a subject to provide the technique which can keep the temperature of glass at an appropriate temperature at the time of glass forming.

The molding apparatus according to claim 1 is a glass molding apparatus provided on the downstream side of the heating furnace, with a glass having a thickness of 3.1 mm or less being conveyed by a conveyance path, with reference to the conveyance direction by the conveyance path. A forming ring that contains a first heater and supports the edge of the glass, a forming die that contains a second heater and presses the glass from above, and is placed in the opening of the forming ring and is placed below the center of the glass. It is characterized by comprising a third heater that warms from the outside.

The molding apparatus according to claim 2 is a glass molding apparatus provided on the downstream side of the heating furnace, with a glass having a thickness of 3.1 mm or less being conveyed by a conveyance path, with reference to the conveyance direction by the conveyance path. A forming ring with a built-in first heater and supporting the edge of the glass, a forming die with a built-in second heater and formed by pressing the glass from above, a plurality of conveying rollers for conveying the glass, and these conveying rollers Roller raising and lowering means for raising and lowering the conveying roller so that the upper surface of the molding moves from a position higher than the upper surface of the molding ring to a position lower than the upper surface of the molding ring, and at a position that does not overlap with the conveying roller in plan view. And a third heater which is disposed in the opening of the ring and warms the central portion of the glass from below.

  The molding apparatus according to a third aspect is characterized in that the roller lifting means lowers the transport roller until the upper surface of the transport roller is lower than the lower surface of the third heater.

The molding apparatus according to a fourth aspect is characterized in that the lower side and the side of the third heater are surrounded by a heat reflecting plate.
The tempered glass manufacturing apparatus according to claim 5 includes a heating furnace that heats the glass along a conveyance path that conveys glass having a thickness of 3.1 mm or less, and a molding apparatus that molds the heated glass. In the tempered glass manufacturing apparatus in which the cooling device for cooling the molded glass and obtaining the tempered glass is provided in this order,
The forming apparatus includes a forming ring that includes a first heater and supports an edge of the glass, a forming heater that includes a second heater and presses the glass from above, and is disposed in an opening of the forming ring. It consists of the 3rd heater which heats the center part of this from the bottom.
The tempered glass manufacturing apparatus according to claim 6 is characterized in that the lower side and the side of the third heater are surrounded by a heat reflecting plate.

In the invention which concerns on Claim 1, the 3rd heater which heats the center part of glass from the bottom in the opening of a shaping | molding ring is provided.
In addition to the first and second heaters that warm the edge and upper surface of the glass, a third heater that warms the center of the glass from below is provided. Thereby, glass can be warmed up entirely. At the time of glass forming, the temperature of the glass can be prevented from being lowered, and the temperature of the glass can be kept at an appropriate temperature.

Also in the invention according to claim 2, the third heater for warming the central portion of the glass from below is provided in the opening of the forming ring.
In addition to the first and second heaters that warm the edge and upper surface of the glass, a third heater that warms the center of the glass from below is provided. Thereby, glass can be warmed up entirely. At the time of glass forming, the temperature of the glass can be prevented from being lowered, and the temperature of the glass can be kept at an appropriate temperature.

In addition, according to a second aspect of the present invention, the conveyance roller is moved up and down from a position higher than the upper surface of the forming ring to a position lower than the upper surface of the forming ring.
When there is glass on the transport roller, the glass can be transferred to the forming ring by lowering the transport roller. On the other hand, when there is glass on the forming ring, the glass can be recovered by raising the conveying roller. The glass replacement operation can be performed only by raising and lowering the transport roller. The time required for the transfer work can be shortened, and the work time of the molding work can be shortened.

  In the invention according to claim 3, the roller elevating means lowers the conveying roller until the upper surface of the conveying roller is lower than the lower surface of the third heater. By lowering the transport roller until it is lower than the third heater, the influence of the heat received by the transport roller from the third heater can be reduced. Thereby, for example, heat countermeasures such as disposing a heat insulating material on the third heater can be minimized, and the third heater can be made compact.

In the invention which concerns on Claim 4, a heat | fever reflecting plate reverses a heat ray. Part of the inverted heat rays hits the third heater, and the remaining part goes to the glass. When the third heater hits the hot wire, the electric energy supplied to the third heater can be saved.
The invention according to claim 5 also includes the third heater for warming the central portion of the glass from below in the opening of the forming ring.
In addition to the first and second heaters that warm the edge and upper surface of the glass, a third heater that warms the center of the glass from below is provided. Thereby, glass can be warmed up entirely. At the time of glass forming, the temperature of the glass can be prevented from being lowered, and the temperature of the glass can be kept at an appropriate temperature. Thereby, a high quality tempered glass can be manufactured.
In the invention which concerns on Claim 6, a heat | fever reflecting plate reverses a heat ray. Part of the inverted heat rays hits the third heater, and the remaining part goes to the glass. When the third heater hits the hot wire, the electric energy supplied to the third heater can be saved.

It is a top view of the tempered glass manufacturing apparatus concerning the present invention. It is sectional drawing of the shaping | molding apparatus which concerns on this invention. It is a top view of a conveyance roller and a 3rd heater. FIG. 4 is a cross-sectional view taken along line 4-4 of FIG. It is an effect | action figure of FIG. It is a figure explaining from glass carrying-in to shaping | molding in the shaping | molding apparatus of this invention. It is a figure explaining the glass carrying-out in the shaping | molding apparatus of this invention. It is a figure explaining the basic composition of the conventional technology.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. The drawings are viewed in the direction of the reference numerals.

Embodiments of the present invention will be described with reference to the drawings.
As shown in FIG. 1, the tempered glass manufacturing apparatus 10 includes a conveyance path 12 that conveys the glass 11, a heating furnace 13 that is provided on the conveyance path 12 and heats the glass 11, and downstream of the heating furnace 13. A molding apparatus 14 that molds the heated glass 11 that is provided and a cooling apparatus 16 that cools the molded glass 11 that is provided downstream of the molding apparatus 14 to obtain the tempered glass 15.

  The conveyance path 12 includes a first conveyance unit 17 that conveys the glass 11 from the heating furnace 13 to the molding device 14, and a second conveyance unit that is provided downstream of the first conveyance unit 17 and conveys the glass 11 in the molding device 14. 18 and a third conveying means 19 that is provided downstream of the second conveying means 18 and conveys the tempered glass 15 in the cooling device 16.

A roller table can be used as the first transport unit 17, and a floating transport unit that floats the glass 11 by the force of air can be used as the third transport unit 19.
The second transport unit 18 includes, for example, a plurality of transport rollers 20 and a roller support frame 23 that collectively supports the transport rollers 20.
A molding ring 24 that supports the glass 11 when the glass 11 is molded is provided so as to surround the roller support frame 23. That is, the transport roller 20 is disposed in the opening 25 of the forming ring 24.
The details of the molding apparatus 14 will be described with reference to the next figure.

  As shown in FIG. 2, the molding apparatus 14 includes a molding ring 24 that is supported at a predetermined height by support columns 26 and 26 and includes a first heater 27, and a second heater that is disposed above the molding ring 24. 28, a molding die 29, a lifting means 31, 31 disposed inside the columns 26, 26 and supporting the roller support frame 23 and the conveying roller 20 so as to be movable up and down, and between these lifting means 31, 31. The table 36 is arranged, a heater support frame 38 mounted on the table 36, and a third heater 40 provided on the heater support frame 38 and warming the central portion 55 of the glass 11 from below.

The third heater 40 is desirably supported as follows.
That is, the first leg 41 is erected on the upper surface of the heater support frame 38, and the channel-shaped heater housing 42 opened upward is placed on the first leg 41. The second legs 43 and 43 are erected from the bottom of the heater housing 42, and the third heater 40 is supported by the second legs 43 and 43.

  The third heater 40 extends in the direction of the front and back of the drawing, and the generated heat rays are radiated equally vertically and horizontally. Since the heat which goes to the left and right and below does not contribute to the heating of the glass 11, the heating efficiency is deteriorated. Therefore, in this embodiment, the lower and left and right sides of the third heater 40 are surrounded by the heat reflecting plate 44. The heat reflecting plate 44 reverses heat rays.

A part of the inverted heat rays hits the third heater 40, and the remaining part goes to the glass 11. When heat rays hit the third heater 40, electric energy supplied to the third heater 40 can be saved.
However, part of the heat travels from the heat reflecting plate 44 to the heater housing 42. This heat flow causes a reduction in heating efficiency. As a countermeasure, a heat insulating material 45 was filled between the heat reflecting plate 44 and the heater housing 42.

  Meanwhile, a part of the heat generated by the third heater 40 is transmitted to the heater support frame 38 through the second legs 43 and 43 and the first leg 41. Since this phenomenon is a heat conduction phenomenon, the amount of heat transfer is proportional to the cross-sectional area of the heat conduction path. Therefore, in the present invention, the third heater 40 is supported by the second legs 43 and 43 and the first legs 41 which are thin and have a small cross-sectional area. The amount of heat transfer related to the second legs 43 and 43 and the first leg 41 can be reduced, and the heating efficiency can be increased.

Next, the lifting / lowering means 31 will be described.
As the elevating / lowering means 31, a hydraulic, hydraulic or pneumatic cylinder can be used. In addition, since a pinion / rack mechanism and a link mechanism can also be adopted, any type of lifting means 31 can be adopted.

Next, the relationship between the conveyance roller 20 and the third heater 40 will be described in detail.
As shown in FIG. 3, elevating means 31 are provided at the four corners of the roller support frame 23, and the conveying roller 20 is provided via a bearing 51 provided in the roller support frame 23.
The third heater 40 is arranged alternately with the conveying roller 20 so as not to overlap the conveying roller 20 arranged in this way in a plan view.

The form in which the conveyance roller 20 is in the ascending limit position will be described with reference to FIG.
As shown in FIG. 4, the conveying roller 20 can be raised from the upper surface of the third heater 40 by extending the elevating means 31, 31.

  Further, as shown in FIG. 5, the conveying roller 20 can be lowered to the side of the heater support frame 38 below the third heater 40 by contracting the elevating means 31, 31.

  Since the third heater 40 is disposed at a position that does not overlap the transport roller 20 in plan view (see FIG. 3), the transport roller 20 is lowered to the side of the heater support frame 38 without the third heater 40 interfering. be able to. That is, the lifting means 31 (lifting means) lowers the transport roller 20 until the upper surface of the transport roller 20 is lower than the lower surface of the third heater 40.

  By lowering the transport roller 20 until it is lower than the third heater 40, the influence of heat received by the transport roller 20 from the third heater 40 can be reduced. Thereby, for example, heat countermeasures such as disposing a heat insulating material on the third heater 40 can be minimized, and the third heater 40 can be made compact.

Next, the operation of the molding apparatus will be described.
As shown in FIG. 6A, the glass 11 is conveyed from the heating furnace (FIG. 1, reference numeral 13) into the forming apparatus 14.
When the glass 11 is transported to above the forming ring 24, the transport of the glass 11 is stopped.

  Next, as shown in (b), the elevating means 31 is actuated to lower the conveying roller 20 below the forming ring 24. Then, the glass 11 placed on the transport roller 20 is transferred to the forming ring 24.

Since the conveying roller 20 is below the forming ring 24, the forming die 29 can be lowered. Therefore, as shown in (c), the forming die 29 is lowered and the glass 11 is formed into a predetermined shape.
At this time, the lower surface edge 53 of the glass 11 is warmed by the first heater 27, the upper surface 54 of the glass 11 is warmed by the second heater 28, and the central portion 55 of the glass 11 is warmed from below by the third heater 40. ing.

In addition to the first and second heaters 27 and 28 that warm the edge 53 and the upper surface 54 of the glass 11, a third heater 40 that warms the central portion 55 of the glass from below is provided. Thereby, the glass 11 can be warmed up entirely. At the time of glass forming, temperature drop of the glass 11 can be prevented and the temperature of the glass 11 can be kept at an appropriate temperature.
The glass 11 thus formed is conveyed toward the cooling device (FIG. 1, reference numeral 16). The operation at this time will be described with reference to the following figure.

As shown in FIG. 7A, when the molding is completed, the mold 29 is raised.
Next, as shown in (b), the lifting / lowering means 31 is operated to raise the transport roller 20. Then, the glass 11 placed on the forming ring 24 is transferred to the conveying roller 20.
Thereafter, the glass 11 is conveyed by the conveying roller 20 toward the cooling device (FIG. 1, reference numeral 16). By conveying to a cooling device in the state maintained at appropriate temperature, glass can be cooled rapidly and a high quality tempered glass can be manufactured.

As described above, the molding apparatus 14 includes the transport roller 20 that is moved up and down from a position higher than the upper surface of the molding ring 24 to a position lower than the upper surface of the molding ring 24.
When the glass 11 is present on the transport roller 20, the glass 11 can be transferred to the forming ring 24 by lowering the transport roller 20. On the other hand, when the glass 11 is on the forming ring 24, the glass 11 can be recovered by raising the conveying roller 20. The work of replacing the glass 11 can be performed only by raising and lowering the transport roller 20. The time required for the transfer work can be shortened, and the work time of the molding work can be shortened.

  In the tempered glass manufacturing apparatus according to the present invention, a method is used in which a roller is used as the first conveying means and the glass is floated and conveyed by the third conveying means by the force of air. However, these methods can be arbitrarily selected, using a method in which the glass is floated by the force of air in the first transport means, using a roller in the third transport means, or using a roller in all transports. There is no limitation on the method of conveying the glass, such as use.

  The tempered glass manufacturing apparatus of this invention is suitable for manufacture of the window glass with which a vehicle is mounted | worn.

DESCRIPTION OF SYMBOLS 10 ... Tempered glass manufacturing apparatus, 11 ... Glass, 12 ... Conveyance path, 13 ... Heating furnace, 14 ... Molding apparatus, 15 ... Tempered glass, 16 ... Cooling device, 20 ... Conveyance roller, 24 ... Molding ring, 25 ... Opening, 27 ... 1st heater, 28 ... 2nd heater, 29 ... Mold, 31 ... Lifting means, 40 ... 3rd heater, 44 ... Heat-reflecting plate, 53 ... Edge part.

Claims (6)

Glass with a thickness of 3.1 mm or less is conveyed by the conveyance path,
On the basis of the conveyance direction by this conveyance path, a glass forming apparatus provided downstream of the heating furnace,
And forming rings are first heater supporting the edges of the glass is incorporated, a mold in which the second heater is built-in molded by pressing from above the glass, a central portion of the glass is arranged in the opening of the molded ring A glass molding apparatus comprising a third heater for heating from below. Glass with a thickness of 3.1 mm or less is conveyed by the conveyance path,
On the basis of the conveyance direction by this conveyance path, a glass forming apparatus provided downstream of the heating furnace,
A shaping ring to support the edges of the glass are first heater is built, and mold the second heater is built-in molded by pressing from above the glass, and a plurality conveying rollers for conveying the glass, conveyed these Roller lifting and lowering means for raising and lowering the transport roller so that the upper surface of the roller moves from a position higher than the upper surface of the molding ring to a position lower than the upper surface of the molding ring; and a position that does not overlap the transport roller in plan view; A glass forming apparatus comprising: a third heater disposed in an opening of a forming ring and warming a central portion of the glass from below.   The glass forming apparatus according to claim 2, wherein the roller raising / lowering unit lowers the conveyance roller until an upper surface of the conveyance roller is lower than a lower surface of the third heater.   The glass forming apparatus according to any one of claims 1 to 3, wherein a lower side and a side of the third heater are surrounded by a heat reflecting plate. A heating furnace that heats the glass along a transport path that transports glass having a thickness of 3.1 mm or less, a molding device that molds the heated glass, and a glass that is tempered by cooling the molded glass. In the tempered glass manufacturing apparatus provided with a cooling device in this order,
The forming apparatus includes a forming ring that includes a first heater and supports an edge of the glass, a forming heater that includes a second heater and presses the glass from above, and is disposed in an opening of the forming ring. A tempered glass manufacturing apparatus comprising: a third heater that heats the central portion of the glass from below.   The tempered glass manufacturing apparatus according to claim 5, wherein a lower side and a side of the third heater are surrounded by a heat reflecting plate.

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