JPH04219334A - Forming device of plate-like body and bending method - Google Patents

Abstract

PURPOSE:To make it possible to improve productivity by carrying out bending side by side and improve quality and simultaneously burn black paint by carrying a plate-like material using high-temperature air. CONSTITUTION:Forming by the objective forming device is characterized in that a plate-like material 22 is subjected to high-temperature heating by blowing high-temperature air from the surface of carrying path 20 using a carrying means 12 and simultaneously carried in the prescribed direction by floating from the carrying path 20, a plate-like material 22 divided alternately in either one direction and the other direction by a holding member 28 of dividing means 14 is subjected to bending, and simultaneously the plate-like material 22 divided in the other direction by the second forming means 18 is subjected to bending.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forming apparatus and a method for bending plate-shaped objects such as rear window glass, front window glass, and side window glass for automobiles.

0002

2. Description of the Related Art Generally, a horizontal bending furnace is used to bend sheet glass used for automobile rear windows. The plate glass heated in the previous process is carried into the horizontal bending furnace by conveyance rollers. When the sheet glass is transported to near the end of the horizontal bending furnace, air is blown out from the lift jet provided below the transport roller, and at the same time, air is blown into the mold through small holes formed on the entire suction surface of the mold. Air is sucked in. The glass sheet is attracted to the mold by this blowing force and suction force, and the central portion of the glass sheet is formed by the suction surface of the mold.

[0003] Next, the press ring is raised to bend the peripheral edge of the glass sheet along the mold, and after bending it into a predetermined final shape, the press ring is retracted and the quench ring is moved below the glass sheet. The peripheral edge of the glass sheet is then placed on a quench ring to separate the glass sheet from the mold and transport it to a cooling station where it is cooled and strengthened. In this way, the glass sheets are heated and formed in a horizontal bending furnace and then cooled and strengthened.

On the other hand, a black paint layer, usually a ceramic color frit layer, is baked on the periphery of a glass plate for a rear window of an automobile. This black ceramic color frit layer is applied to the sheet glass before forming, and must be baked in a furnace during bending.

[0005]

[Problems to be Solved by the Invention] By the way, a conventional horizontal bending furnace is equipped with only one forming die, so while the forming die is bending and forming the glass sheet, the next glass sheet that has been transported is being bent. There is a problem in that productivity is low because you have to wait in front of the mold. In addition, since rollers are used to convey the sheet glass, if the sheet glass is stopped in the furnace, it will slump between the rollers and bend, so the sheet glass must be stopped relative to the mold in the furnace and positioned with high precision. Therefore, there is a problem that it is not possible to maintain uniform quality. Furthermore, since conveyance rollers are used, there is a problem in that when the temperature in the furnace is raised to a high temperature at which the black paint layer is baked, the sheet glass is scratched by the rollers.

The present invention has been made in view of the above circumstances, and it is possible to improve productivity, further improve quality, and improve the quality of the black paint layer applied to the periphery of sheet glass. It is an object of the present invention to provide a forming device and a bending method for a plate-like object that can be baked.

[0007]

[Means for Solving the Problems] In order to achieve the above object, the present invention blows high-temperature air up from the surface of a conveyance path to heat a plate-shaped body at a high temperature, and also floats it from the conveyance path and directs it in a predetermined direction. a distributing means comprising: a conveying means for conveying; and a holding member for holding the plate-like object conveyed by the conveying means; a first forming means that is provided at a predetermined position in one direction and bends and forms the plate-shaped bodies that have been sorted by the sorting means; and a first forming means that is provided at a predetermined position in the other direction and that has been sorted by the sorting means; A second forming means for bending and forming the shaped body.

[0008]

[Function] According to the present invention, the conveying means blows up high-temperature air from the surface of the conveying path to overheat the plate-like object and allows the plate-like object to float and be conveyed from the conveying path. It can be heated to the temperature required for predetermined bending and strengthening. Moreover, at the same time, the black paint layer applied to the periphery of the plate-shaped body can be baked during transportation. Further, the plate-like objects conveyed from the conveying means are alternately distributed to the first forming means and the second forming means by the distributing means, and the plate-like objects are placed at predetermined positions of the first and second forming means. Be able to position your body. Therefore, while the first forming means is bending a plate-like object, the second forming means can be used to bend-form another plate-like object, thereby improving productivity. Since the shaped body can be accurately bent and formed, quality can be improved.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A plate-like body forming apparatus and bending method according to the present invention will be explained in detail below with reference to the accompanying drawings. As shown in FIG. 1, a bending furnace 10 according to the present invention has a conveying means 12
, a sorting means 14, a first forming means 16, a second forming means 18, etc., and the conveying means 12 is equipped with a conveying path 20. The transport path 20 has holes 20A, 20A, .

Furthermore, since the conveyance path 20 is formed with a downward slope in the right direction in FIG. When floating above the transport path 20, it is transported in the direction of arrow A along the transport path 20. Further, for stable conveyance, guides may be provided on both sides or one side of the conveyance path. By providing the guide, the position of the rear window glass sheet in the direction perpendicular to the conveyance path can be kept constant, so that the positioning of the glass sheet in a subsequent process can be facilitated. In this way, since high-temperature air is blown onto the rear window glass plate 22, the rear window glass plate 22 becomes hot and the black ceramic color frit layer 22A coated (printed) around the rear window glass plate 22 is heated. Can be baked. Of course, it is not necessary to apply such a black ceramic color frit layer.

The sorting means 14 includes a conveyance path 24 orthogonal to the conveyance path 20, and the conveyance path 24, like the conveyance path 20, has holes 24A, 24A, . . . formed in the entire area of the conveyance path 24. Air is blown up into the holes 24A, 24A, . . . from an air blower (not shown) provided below the conveyance path 24. The temperature of this air is set lower than the temperature of the air blown up from the conveyance path 20 of the conveyance means 12.

A guide rail 26 is provided parallel to the conveyance path 24, and a shuttle 28 is slidably provided on the guide rail 26. Catcher 30 on shuttle 28
is provided, and the catcher 30 is arranged above the conveyance path 24. At both ends of the catcher 30 are protrusions 30A,
30A, and the upper end 22B of the rear window glass plate 22 is locked between these protrusions 30A, 30A.

An endless belt 32 is fixed to the shuttle 28, and the belt 32 is stretched around pulleys 34, 34 (only one is shown) provided at both ends of the guide rail 26. A servo motor 36 is connected to this pulley 34, so when the servo motor 36 is driven, the belt 32 rotates and the shuttle 26 can move along the conveyance path 24. Further, the catcher 30 can be stopped at a predetermined position by controlling the pulse signal that drives the servo motor 36.

Note that the shuttle 28 can move along the guide plate 31 in the direction of arrow DE. A first forming means 16 is provided at the oblique upper end of the conveyance path 24 in FIG. The first molding means 16 is equipped with a rectangular air table 40 that is continuous with the oblique upper end of the conveyance path 24 . As shown in FIG. 2, the rectangular air table 40 has obliquely band-shaped grooves 40A, 4.
0A... is provided. Blow ports 40B, 40B, . . . are formed in the groove portion 40A. Also, groove portions 40A, 4
Lift jets 40C, 40C... are provided between 0A. Furthermore, above the air table 40 is a mold 42.
is provided, and suction holes are formed throughout the bottom surface of the mold 42.

As a result, until the rear window glass plate 22 is conveyed to a predetermined position on the air table 40 by the catcher 30 of the shuttle 28, the blowing ports 40A, 40A...
Air is blown up from the rear window and conveys the rear window glass plate 22. Then, the plate glass 22 for the rear window is molded into the mold 4.
2, the lift jet 4
Air is blown up from 0C, 40C, . . . , and air is sucked in from the suction port on the bottom of the mold 42, so that the rear window glass plate 22 is attracted to the bottom of the mold 42.

In addition, a support stand 41 is provided in front of the air table 40 in FIG. (see figure). This press ring 44 is the mold 42
When the mold 42 moves below the mold 42, the mold 42 lowers and the mold 4
Both edges of the rear window sheet glass 22 adsorbed to the bottom surface of the rear window glass 22 can be pressed and bent.

A cooling device 50 is provided behind the air table 40 in FIG. The cooling device 50 consists of a lower outlet 50A and an upper outlet 50B, and cooling air can be blown out from the lower outlet 50A and the upper outlet 50B. A quench ring 54 is movably provided on a support stand (not shown) behind the cooling device 50. The quench ring 54 can be moved from a retracted position from the cooling device 50, ie, the position shown in FIG. 1, to a position below the mold 42. Therefore quench ring 40
Below the mold 42, the bent rear window sheet glass 22 can be received from the mold 42 and cooled between the lower blow port 50A and the upper blow port 50B of the cooling device 50.

In FIG. 1, a second forming means 18 is provided at the oblique lower end of the conveyance path 24 in parallel to the first forming means 16. The second molding means 18 is constructed from the same members as the first molding means 16 described above, and therefore will be given the same reference numerals and a description thereof will be omitted. The operation of the plate-shaped body forming apparatus according to the present invention configured as described above will be explained.

First, the air blower below the conveyance path 20 is operated to blow up high-temperature air from the holes 20A, 20A, . Convey in the direction of arrow A in Figure 1. This high-temperature air simultaneously causes the rear window glass 2 to
2 is heated to a temperature at which bending reinforcement processing is possible. At this time, the black paint layer 22A applied to the periphery of the rear window glass plate 22 simultaneously coats the rear window glass plate 22.
It is baked on the surface of 2. The rear window glass plate 22 with the black paint layer 22A fired in this manner enters between the protrusions 30A and 30A of the catcher 30 of the distribution means 14. As a result, the rear window glass plate 22 is held by the catcher 30.

[0020] The rear window plate glass 22 is the catcher 3.
When held at zero, the pulse motor 36 is driven to move the shuttle 28 in the direction of arrow B in FIG. When the shuttle 28 reaches a predetermined position below the mold 42, the pulse motor 36 stops. In this way, since the rear window glass plate 22 is positioned by the catcher 30, the mold 4
It can be accurately positioned below 2.

Next, air heated to a predetermined temperature is blown up from the lift jets 40C, 40C, . The plate glass 22 for the rear window placed in the mold 42 is
Adsorbs to the bottom of the. As a result, the rear window glass plate 2
The central portion of the glass plate 2 or, if the sheet glass is not bent deeply, almost the entire surface thereof is bent on the forming surface of the forming die 42. Next, the press ring 44 is moved below the mold 42 and the mold 42 is lowered. As a result, both edges of the rear window sheet glass 22 adsorbed to the bottom surface of the mold 42 are pressed by the press ring 44 and bent into a predetermined final bent shape. After the bending is completed, the mold 42 is raised and the press ring 44 is retracted to the position shown in FIG.

After the press ring 44 is retracted, the quench ring 54 moves to the bottom of the mold 42, and then
descends and places the bent rear window glass sheet 22 from the mold 42 on the quench ring 54. When the rear window glass plate 22 is placed on the quench ring 54, the mold 42 is raised and the quench ring 54 is placed on the mold 4.
Evacuate from below 2. In this case, the quench ring 54 is located between the lower air outlet 50A and the upper air outlet 50B of the cooling device 50, so the rear window plate glass 22 is used for cooling air blown out from the lower air outlet 50A and the upper air outlet 50B. cooling is strengthened. As a result, the rear window glass plate 2
2. Bending and strengthening processing is completed.

By the way, while the first forming means 16 is bending the rear window glass sheet 22, a new rear window glass sheet 22 conveyed from the conveyance path 20 is received by the catcher 30. When a new rear window glass plate 22 is received by the catcher 30, the pulse motor 36 is driven and the shuttle 28 moves in the direction of arrow C. The shuttle 28, which has moved in the direction of arrow C, moves to a predetermined position below the mold 42 of the second molding means 18, and the pulse motor 36 stops. As a result, the new rear window glass plate 22 is positioned at a desired position below the mold 42 of the second molding means 18. The new rear window glass sheet 22 that has been positioned is bent by the second forming means 18 in the same process as the first forming means 16 described above.

Note that if the bent shape of the sheet glass to be bent is not a deep bending shape, that is, a shape in which both sides of the sheet glass are bent deeply, the bending using the press ring 44 is omitted, and the reinforcing process is performed under the mold 42. Quench ring 54 for
Alternatively, the material may be moved, transferred, and strengthened.

As described above, according to the present invention, the rear window glass sheet 22 transported through the transport path 20 is transported to the shuttle 28.
The second forming means 18 is alternately distributed to the first forming furnace and the second forming furnace, so that while the first forming means and cooling device are bending and strengthening the rear window sheet glass 22, the second forming means 18 and another rear window glass plate 22 with a cooling device.
It can be bent, formed and strengthened.

In the above embodiments, bending of sheet glass for automobile rear windows was described, but the bending furnace of the present invention can also be applied to other sheet materials such as metals and plastics.

[0027]

As described above, according to the plate-shaped body forming apparatus and bending method of the present invention, it is possible to heat the plate-shaped body while conveying the plate-shaped body with high-temperature air. Furthermore, when a black ceramic color frit layer is applied, the black ceramic color frit layer applied to the periphery of the plate-like body can be simultaneously baked during transportation. In addition, first and second forming furnaces are provided in parallel, and the plate-shaped body is placed in the first forming furnace.
, and can be distributed alternately to the second forming means, so that the bending and forming of the plate-like bodies can be performed in parallel, and productivity can be improved. Furthermore, since the plate-shaped body can be positioned in the furnace with respect to the first and second forming means, quality can be improved.

[Brief explanation of the drawing]

[Fig. 1] Perspective view of bending forming device

[Figure 2] Enlarged view of main parts of air table

[Explanation of symbols]

10　Bending forming furnace 12 Transport means, 14 Sorting means 16 First molding means 18 Second molding means 20 Conveyance path 22 Rear window plate glass 28 Shuttle 30 Catcher

Claims (2)

[Claims] 1. Conveying means for blowing up high-temperature air from the surface of a conveying path to heat a plate-shaped body to a high temperature, floating it from the conveying path, and conveying it in a predetermined direction; comprising a holding member that holds the plate-shaped body;
a distributing means for distributing the holding member alternately in one direction and the other direction; and a first forming means provided at a predetermined position in the one direction for bending and forming the plate-shaped bodies distributed by the distributing means. and a second forming means provided at a predetermined position in the other direction for bending and forming the plate-like objects sorted by the sorting means. 2. A step of blowing high-temperature air up from the surface of a transfer furnace to superheat the plate-shaped body to a high temperature, and floating the plate-shaped body from the transfer furnace and conveying it in a predetermined direction; The present invention is characterized by comprising a step of distributing holding members holding the shaped bodies alternately in two directions, and a step of bending and forming the distributed plate-shaped bodies at predetermined positions in each of the two directions. A method for forming a plate-shaped body.