JPH0238331A - Flexural forming of raw flat glass for laminated glass and device therefor - Google Patents

Abstract

PURPOSE:To efficiently carry out deep flexural forming by putting two sheets of the raw laminated flat glass in layers, placing the glass on a preliminary- flexure mold with a specified structure, carrying out provisional molding by gravity flexure, transferring and placing a final-flexure mold and carrying out flexural forming at the deep flexure part using press treatment. CONSTITUTION:Two sheets of the raw laminated flat glass (G) put in layers are placed on a preliminary-flexure mold 2 for gravity flexure where units corresponding to deep flexure parts are movable split molds 2b, heated at flexure temperature in a heating oven 1 for preliminary flexure and subjected to gravity flexure. The movable split molds 2b are moved to prescribed positions for forming shape of the raw flat glass (G) to carry out provisional forming. Two sheets of provisionally formed raw flat glass (G) are then transferred to a final-flexure mold 4 and sent to a stage (PS) for press treatment in a heating oven 3 for final flexure. Simultaneous flexural forming of two sheets of raw flat glass (G) for laminated glass and deep flexural forming of the side parts are carried out by pressing the deep flexure parts against units corresponding to deep flexure of the final flexure mold 4 using a pressing unit 7.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method and apparatus for simultaneously bending and forming two pieces of raw glass for laminated glass. The present invention relates to a method for bending and forming blank glass for laminated glass, which is optimal for deeply bending the side portions of glass, and improvements to the device.

[Prior Art] Generally, laminated glass is made by laminating two sheets of glass with a plastic interlayer film such as polyvinyl butyral film, and is widely used for safety reasons, especially as windshields for automobiles. has been done.

By the way, this type of laminated glass usually requires a two-dimensional or three-dimensional curved surface for favorable design reasons such as the body line of an automobile. As for the two sheets of raw glass, it is necessary to appropriately bend and form the flat plates.

At this time, if the pixel glass plates are molded separately, the curved shapes of the pixel glass plates will be slightly different, and when the two pieces of raw glass are laminated with an interlayer film interposed between them, or not bonded sufficiently,
There were drawbacks such as the generation of bubbles on the joint surface and peeling. Therefore, when manufacturing laminated glass, a method has traditionally been adopted in which two sheets of glass are stacked and bent at the same time.

The conventional method for bending and forming raw glass for laminated glass is to construct a bending mold that corresponds to the bending surface of the laminated glass, stack two sheets of glass for laminated glass on top of this bending mold, and then The bending mold is carried into the heating furnace in the state of being placed in the same position, and the pixel plate glass is heated to the bending temperature of the glass, and as the pixel plate glass softens, the pixel plate glass is bent under its own weight along the bending surface of the bending die. It is known that it is bent and formed (Japanese Patent Publication No. 49-1033)
(See Publication No. 2).

In such a method, if it is necessary to deep bend the side part of the laminated glass, a ring-shaped molding surface having a bending surface corresponding to the general curved part (shallow bent part) with a gentle curvature of the laminated glass is used. It has a separate fixed mold and a bending surface corresponding to the deep bending part of the side of the laminated glass, and is provided on both sides or one side of the fixed split mold so as to be movable under its own weight in a direction that connects to the fixed split mold. After constructing the bending mold with a ring-shaped movable split mold, and placing two flat glass blanks on top of each other on the bending mold with the movable split mold unfolded,
This blank glass was carried into a heating furnace, and as the blank glass softened, the movable split mold was moved in a direction continuous with the fixed split mold, so that the sides of the pixel plate glass were deeply bent by the movable split mold. A method using self-weight bending has already been provided (see Japanese Patent Publication No. 1210/1983).

[Problems to be Solved by the Invention] However, in such a conventional method of bending and forming blank glass for laminated glass, when deeply bending the sides of the blank glass for laminated glass, displacement due to its own weight occurs. The sides of the pixel plate glass are forcibly bent using a movable split mold, but when increasing the degree of deep bending of the sides of the laminated glass, the shape of the periphery of the deeply bent part of the pixel plate glass must be Although it can be formed into a shape that follows the movable split mold, the degree of deformation of the softened blank glass cannot follow the shape of the curved part of the pixel plate glass except for the periphery of the deeply bent part to create the desired curvature surface. This causes a problem in that the pixel plate glass is insufficiently formed. It is also possible to heat the part to be deeply bent more locally to make it easier to bend, but even with this, the deep bending part of the two sheets of glass was still insufficiently formed.

In order to solve these problems, one possible method to form the surface shape accurately is to apply a press method in which a sheet of glass is sandwiched between a concave mold and a convex mold.
In the case of laminated glass, two pieces of raw glass must be molded at the same time, so it is necessary to overlap the two pieces of raw glass and accurately position and hold them during molding.

However, the hanging method cannot be applied in cases where hanging marks are not desired, and even if the vacuum adsorption method is used as a method that does not leave hanging marks, it is not possible to hold two overlapping sheets of blank glass. A problem arises in that the above pressing method cannot be applied as is.

Alternatively, in order to solve this problem, two pieces of raw glass are prepared that are larger than the design dimensions of the laminated glass to be obtained, so that the sides of the raw glass can be easily bent. An oversize processing method in which two sheets of oversized glass are stacked and bent simultaneously to obtain the desired shape, and then the peripheral portions are cut to obtain two sheets of glass for laminated glass with the desired design dimensions. However, this method requires a cutting process after bending, which is time consuming and costly.

In view of the above-mentioned problems, the inventors of the present invention heated a blank glass sheet for laminated glass to the bending temperature of the glass, pre-formed it into a shape that roughly followed the bending die by bending it under its own weight, and then carried out an auxiliary pressing process. A method of bending and forming blank glass for laminated glass in which incompletely formed parts are corrected by partial pressing has already been provided (Japanese Patent Application No. 63-55019).

However, in this type of method, two glass sheets placed on one bending mold must be bent under their own weight and partially pressed in the same heating furnace, so the bending mold is a so-called split mold. When performing partial pressing, it is necessary to fix the movable split part of the bending die using a complicated ramp structure to prevent distortion from occurring at the end of the fixed split part. It becomes necessary to suppress it. For this reason,
A problem arises in that it is difficult to realize a mass production system for bending and forming blank glass for laminated glass by applying the method described above as is.

This invention was made based on the above-mentioned viewpoints, and it is possible to reliably deep-bend the sides of laminated glass without the need for troublesome post-processing, and moreover, it can be easily adapted to a mass production system. The present invention provides a method of bending and forming a blank sheet for laminated glass, which can be realized, and an apparatus therefor.

[Means for Solving the Problems] That is, a method for bending and forming raw glass sheets for laminated glass that achieves the above problems is as shown in FIG. When simultaneously bending and forming the sides of the blank glass so that the sides of the blank glass are deeply bent, the two blank glass sheets are placed in a pre-bending mold for self-weight bending, which has a movable split mold at the location corresponding to the deep bending part of the blank glass. At the same time, the two pieces of blank glass were heated to the glass bending temperature in a pre-bending heating furnace and bent under their own weight, and the movable split mold was displaced to the preset position of the forming shape of the blank glass. A pre-bending step (A) in which the two glass blanks are temporarily formed into a shape that roughly follows the predetermined forming surface of the pre-bending mold obtained by the step (A), and the temporarily formed two glass blanks are pre-bended in a heating furnace. A transfer step (B) of transferring the blank glass from the preliminary bending mold to the main bending mold in which the forming surface of the blank glass is fixedly formed in advance in the main bending heating furnace, and the main bending heating furnace in which the glass is heated to the bending temperature of the glass. The main bending process (C) is to press the deep bending part of the two sheets of glass which have been temporarily formed in the pre-bending heating furnace in the press processing stage of the process into the deep bending corresponding part of the main bending die. .

In addition, as shown in FIG. 1(b), an apparatus for realizing the above-mentioned method of bending and forming raw glass for laminated glass is such that two sheets of raw glass G for laminated glass are overlapped and the sides of the raw glass G are It is bent and formed at the same time in order to be deeply bent,
A pre-bending heating furnace 1 whose atmospheric humidity is heated to the bending temperature of the above-mentioned blank glass G, and a pre-bending heating furnace 1 which is movably disposed within this pre-bending heating furnace 1 and corresponds to the general curved part to be formed of the above-mentioned blank glass G. The fixed split mold 2a has a bending surface that corresponds to the blank part to be molded of the blank glass G, and the fixed split mold 2a has a bending surface that corresponds to the blank part to be molded, and the end of the fixed split mold 2a is directed by its own weight in a direction that connects to the fixed split mold 2a. It consists of a movable split mold 2b that is movable as much as possible, and when two pieces of raw glass G stacked on top of each other astride both split molds 2a and 2b reach the glass bending temperature environment. A preliminary bending mold 2 in which the movable split mold 2b is displaced to a set position where it is connected to the fixed split mold 2a, a main bending heating furnace 3 whose ambient temperature is heated to the bending temperature of the blank glass G, and this main bending heating furnace. A main bending mold 4 is movably disposed within the main bending mold 3 and has a bending surface corresponding to the curved portion to be formed of the blank glass G, and is communicatively connected to the pre-bending heating furnace 1 and the main bending heating furnace 3. Also, a transfer furnace 5 is maintained at a temperature that maintains the shape of the blank glass G temporarily formed in the pre-bending heating furnace 1, and the pre-bending mold 2 is disposed within the transfer furnace 5. A transfer means 6 for transferring the blank glass G temporarily formed above onto the main bending mold 4, and a press processing stage PS in the main bending heating furnace 3.
It has a pressing body 7a formed with a curved surface corresponding to the lateral blank part of the blank glass G to be formed, and the deep bending part of the blank glass G is firmly bent with the pressing body 7a in the press processing stage PS. It is equipped with a press means 7 for pressing against the bending mold 4.

In such technical means, the configuration of the pre-bending heating furnace 1 when bending and forming two pieces of raw glass G for laminated glass at least
As long as the material is heated to the bending temperature of glass, the design may be changed as appropriate. In this case, from the viewpoint of maintaining good bending formability, it is preferable to locally heat the side part of the blank glass G to be deep bent to a higher temperature than other parts. For such local heating, it is preferable to arrange a local heater close to the upper side, the lower side, or both upper and lower sides of the relevant portion of the two stacked blank glass sheets G to be deep bent.

Further, the pre-bending mold 2 was formed by dividing it into a fixed split mold 2a and a movable split mold 2b using a heat-resistant material that can withstand the molding atmosphere temperature (approximately 600 to 750°C) in the pre-bending heating furnace 1. If it is, you can change the design as appropriate. Furthermore, the configuration of the fixed split mold 2a and the movable split mold 2b is as follows:
Either a planar type corresponding to the base glass G or a ring-shaped type having a molded surface that can support the periphery of the base glass G may be used, but it is possible to maintain the smooth flatness of the base glass G and reduce the number of sacred spots. , in order to equalize the heating of the base glass G and reduce the loss of heat capacity, the base glass G
A ring-shaped one is preferable in that it minimizes the contact area between the surface of the pre-bending mold 2 and the pre-bending mold 2. Furthermore, the design of the movable split mold 2b may be changed as appropriate as long as it moves in the direction connected to the fixed split mold 2a under its own weight and stops at the set position connected to the fixed split mold 2a. The return force to the set position can be adjusted by the components and weights of the movable split mold 2b itself.

As a means for conveying this pre-bending die 2, a trolley may be moved along a predetermined circulation path or an advance/retreat path, or a continuous conveyor belt made of heat-resistant conveyor rolls or conveyor belts may be used. The design may be changed as appropriate, such as by using a conveyor.

In this case, the pre-bending mold 2 needs to be temporarily stopped at least at the transfer work stage when it enters the transfer furnace 5, so the means for transporting the pre-bending mold 2 must be stopped at the transfer work stage. It is necessary to attach a mechanical positioning means to the transport means or to control the positioning of the transport means using a control system.

Further, the number of preliminary bending dies 2 can be appropriately selected in consideration of productivity.

Furthermore, regarding the configuration of the main bending heating furnace 3, at least the blank glass G to be formed is heated to the glass bending temperature, and then the side portions of the heated softened blank glass G are deep bent with a press. As long as it includes the processing stage PS, the design may be changed as appropriate. In this case, in order to maintain good bending formability of the blank glass G, it is preferable to heat the portion of the blank glass G to be deep bent more locally than other portions, similarly to the pre-bending heating furnace 1.

Furthermore, regarding the handling of the two sheets of raw glass G that have passed through the press processing stage PS, the design may be changed as appropriate, such as taking them out after being naturally slowly cooled and hardened, but this will effectively prevent the glass sheets G from cracking. From this point of view, it is preferable to perform a peripheral edge strengthening process on the peripheral edge of the base glass G.

In this case, the above-mentioned peripheral edge strengthening treatment includes cooling the peripheral edge by rapidly pulling out the raw glass G toward the side where the ambient temperature is lower at a peripheral edge strengthening processing stage where there is a difference in ambient temperature, or One example is a rapid cooling process such as spraying. In addition, rapid cooling in the present invention means 1000Kg/Ci~
J with surface compressive stress of about 1700Kg/Cl1i
This does not refer to the rapid cooling required to obtain a tempered glass sheet as defined in IS, but rather a temperature of 80°C, which is considerably lower than that.
This refers to cooling at a rate of about 300°C/min to 300°C/min. By cooling the base glass at such a cooling rate, the entire surface of the glass plate is not strengthened, and only the peripheral edge, which is preferable as a laminated base glass, has a strength of 150'l/cji to 500Kg/c.
Therefore, it is possible to obtain a laminated blank glass having a plane compressive stress of about i.

From the viewpoint of improving rapid cooling efficiency, the two sheets of blank glass G press-formed against the main bending die 4 are separated and held, thereby allowing heat to flow from the main bending die 4 to the blank glass G. Try to avoid
It is preferable to design such that only the peripheral edge of the tube is once reheated to perform rapid cooling with a temperature difference.

The main bending die 4 is made of a heat-resistant material that can withstand the ambient temperature (600 to 750°C) in the main bending heating furnace 3, and has the bending surface of the base glass G unchanged. If so, you can change the design as appropriate. In this case, the specific configuration, positioning means, and number of the means for conveying the main bending die 4 can be appropriately designed from the same viewpoint as the conveying means for the preliminary bending die 2.

Regarding the transfer furnace 5, the design may be changed as appropriate to the extent that the transfer operation of the two glass blanks G temporarily formed in the pre-bending heating furnace 1 can be carried out smoothly. From the viewpoint of minimizing heat loss, it is preferable to maintain the ambient temperature as high as possible within a range that allows the shapes of the two temporarily formed base glasses G to be maintained.

Furthermore, regarding the transfer means 6, if the blank glass G temporarily formed from the preliminary bending die 2 to the main bending die 4 is to be transferred from the preliminary bending die 2 to the main bending die 4 in the transfer furnace 5, Assuming a type in which the preliminary bending die 2 and the main bending die 4 are placed in different stages, the two sheets of blank glass G are lifted from the preliminary bending die 2 and moved, and the alignment is performed on the way or at the 4 parts of the main bending die. After that, the two glass sheets G temporarily formed from the preliminary bending die 2 are placed on the main bending die 4, or are placed on the preliminary bending die 2 in the transfer furnace 5. After lifting and holding it once, replacing the preliminary bending die 2 and the main bending die 4 on the same stage, the design may be changed as appropriate, such as by placing the blank glass G on the main bending die 4. In this case, from the viewpoint of facilitating the design of the conveying means for the preliminary bending die 2 and the main bending die 4, it is preferable to design the former, and also because it facilitates the alignment of the blank glass G. From this point of view, it is preferable to design the latter.

Moreover, regarding the press processing means 7, the main bending die 4 does not interfere with the main bending die 4 when it reaches the press processing stage PS, and the deep bending forming surface of the main bending die 4 is formed on the press processing stage PS. As long as the side portion of the plate glass G is pressed by the pressing body 7a, the design may be changed as appropriate. In this case, in order to effectively suppress the occurrence of wrinkles on the sides of the blank glass G, it is recommended to press the sides of the blank glass G with the pressing body 7a from a direction substantially perpendicular to the deep bending surface of the main bending die 4. It is preferable to design the Then, the pressing body 7a
From the viewpoint of making it easy to accurately determine the relative positional relationship with the main bending mold 4, it is preferable to install it on the conveying means side of the main bending mold 4, and a large number of main bending molds 4 are required. case, thermal efficiency of the main bending heating furnace 3, pressing body 7a
Considering the durability of the support mechanism, it is preferable to install it at an appropriate location on the press processing stage PS. Also, the shape of the pressing body 7a may be formed to correspond to the entire deep bending group of the blank glass G for laminated glass.
At least, it is preferable to form it corresponding to a location with a large curvature of a deep bending part where forming is likely to be incomplete in the pre-bending heating furnace 1. Further, when bending the deep bent portion into a shape with partially different curvatures, a pressing body 7a having a press surface with a different curvature according to the bent shape is used.

[Function] According to the above-mentioned technical means, in the pre-bending process A, two pieces of raw glass G for laminated glass are placed on the pre-bending mold 2 and the raw glasses are heated in the pre-bending heating furnace 1. The plate glass G is heated to the bending temperature. Then, the two flat sheets of glass G are heated and softened and temporarily formed into a shape roughly along the pre-bending die 2 which has been changed into a state corresponding to the forming surface of the glass sheet G.

Next, in the transfer step B, the two temporarily formed blank glass sheets G are transferred from the preliminary bending mold 2 to the main bending mold 4 of the main bending heating furnace 3 .

After that, in the main bending process C, the two pieces of blank glass G after the temporary forming placed on the main bending die 4 were heated to the bending temperature of the blank glass G in the main bending heating furnace 3. Thereafter, it is transported to the press processing stage PS. In this press processing stage PS, the incompletely formed portions of the two pieces of raw glass G, specifically, the deep bending portions of the pixel plate glass G, are partially pressed along the deep bending corresponding portions of the main bending die 4. molded.

[Example 7] Hereinafter, a method and apparatus for bending a blank glass for laminated glass according to the present invention will be explained in detail based on an example shown in the accompanying drawings.

Embodiment 1 FIG. 2 shows the present invention applied to a bending system for deeply bending both sides of two sheets of glass for laminated glass.

In this embodiment, a bending and forming apparatus for raw glass for laminated glass is connected to a pre-bending heating furnace 1 for temporarily forming two sheets of glass G, and a side portion of this pre-bending heating furnace 1 in a substantially perpendicular direction. A transfer furnace 5 to be connected, and two blank glass sheets G that are connected in a substantially right angle direction at one side of the transfer furnace 5, extend to the opposite side from the pre-bending heating furnace 1, and are temporarily formed.
It is equipped with a final bending heating furnace 3 for final bending.

As shown in FIGS. 2 and 3, the pre-bending heating furnace 1 is equipped with a large number of heaters 11, and the atmospheric temperature in the furnace is adjusted to the bending temperature of the blank glass G (ordinary soda lime silicate for automobiles). In the case of glass, about 550-650℃,
Particularly preferably, the temperature is maintained at about 550 to 600°C), and a large number of pre-bending dies 2 (not shown) are installed at the pre-bending heating furnace 1 and at the intersection between the pre-bending heating furnace 1 and the transfer furnace 5. It is installed on a trolley 12 that moves via a conveyor and moves in circulation. In addition, the reference numeral 7a in FIG. 2 is a cooling furnace provided on the exit side of the pre-bending heating furnace 1;
Reference numeral 9 indicates a circulation conveyance path outside the pre-bending heating furnace 1.

Further, as shown in FIGS. 2 and 4, the main bending heating furnace 3 is equipped with a large number of heaters 31 to maintain the atmospheric temperature in the furnace at the bending humidity of the raw glass G, and the above-mentioned At the intersection of the main bending heating furnace 3 and the main bending heating furnace 3 and the transfer furnace 5, a large number of main bending dies 4 are installed on a trolley 32 that moves via a chain conveyor (not shown), and are circulated. It looks like this. The main bending heating furnace 3 is provided with a press processing stage PS, and a press means 7 for press forming an incompletely formed portion of the blank glass G is installed on this press processing stage PS. A peripheral edge strengthening processing stage QS of the raw glass G is provided after the PS, and this peripheral edge strengthening processing stage QS
A peripheral edge strengthening processing means 8 is installed for hardening the molded blank glass G while strengthening its peripheral edge. In FIG. 2, reference numeral 3a indicates a preheating furnace provided on the inlet side of the main bending and heating furnace 3, and 10 indicates a circulation conveyance path outside the main bending and heating furnace 3.

Furthermore, as shown in FIGS. 2 and 5, the transfer furnace 5 is equipped with a heater (not shown) to maintain the atmosphere temperature in the furnace at a temperature lower than the bending temperature of the base glass G. ,
In this transfer furnace 5, a means 6 for transferring two temporarily formed blank glass sheets G is installed.

In this embodiment, the preliminary bending die 2 is a general curved part (shallow bent part) excluding both sides of the blank glass G for laminated glass that is deeply bent, as shown in FIGS. 6 and 7. A ring-shaped fixed split mold 2a having a bending portion 13 corresponding to the bending portion 13, and a bending surface 14 movably provided on both sides of the fixed split mold 2a and corresponding to the deep bending portion of the blank glass G for laminated glass. The bending surface 14 is constituted by a ring-shaped movable split mold 2b that is continuous with the bending surface 13 of the fixed split mold 2a at the set position S.

Then, the fixed split mold 2a is connected to the trolley 12 via the support 15.
While the movable split mold 2b is fixed at the top, both sides of the movable split mold 2b in the width direction are supported by columns 17 erected on the fixed bracket 16 on the trolley 12.
It is swingably supported at the tip of the shaft 18 via a pivot shaft 18.

Furthermore, a balance weight 19 is attached to the support portion of the movable split die 2b via a moment arm 20, which biases the movable split die 2b toward the set position S side where the movable split die 2b is connected to the fixed split die 2a. Stopper arms 21 each having a rectangular cross-section are provided on both sides in the width direction of the split mold 2b to protrude toward the cart 12, and when the movable split mold 2b reaches a set position S connected to the fixed split mold 2a, the stopper arms 21 The tip of the arm 21 is adapted to abut against a stopper wall 22 made of a bolt or the like which is attached to the carriage 12 so that its length can be adjusted.

On the other hand, the main bending die 4, as shown in FIG.
Fixed on 2. A push-up die 131 (details will be described later) is disposed inside the main bending die 4 to push up and hold the blank glass G from the main bending die 4 when the peripheral edge strengthening means 8 is activated.

In addition, as shown in FIG. 5 in particular, the transfer means 6 transfers two sheets of blank glass G after temporary forming from the pre-bending die 2 positioned on the positioning stage YS of the pre-bending die 2 of the transfer furnace 5. a first push-up holding means 46 that pushes up and holds the glass material upward; and a conveyance hoist 50 that holds and transports the two sheets of blank glass G pushed up and held by the first push-up holding means 46. A positioning stage Is is installed in the middle of the transport path of the transport hoist 50 to perform positioning with respect to the main bending mold 4, and a positioning stage H3 of the main bending mold 4 of the transfer furnace 5 positions the main bending mold 4. A second push-up holding means 100 is provided for once pushing up and holding the aligned blank glass G transported by a transport hoist 50 to the main bending die 4 and then placing it thereon.

In this embodiment, the positioning means 40 of the pre-bending die 2
As shown in FIGS. 9 and 10, this is for releasing the engagement between the chain conveyor 23 and the trolley 12 at the positioning stage YS, and for example, a a pair of stoppers 42 erected on the positioning platform 41 in the direction of movement of the pre-bending die 2; and a rectangular support frame 43 placed on the positioning platform 41. For example, four support rods 44 are erected at each corner of the support frame 43, and a positioning drive mechanism 45 that raises and lowers the positioning platform 41 as appropriate.The positioning drive mechanism 45 includes a drive cylinder 45a. and a transmission shaft 45b that transmits the driving force from the drive cylinder 45a.
A bevel gear mechanism 45c that transmits the driving force of the transmission shaft 45b by changing the rotational direction; an eccentric cam 45d rotated by the bevel gear mechanism 45c; The eccentric cam 45 is provided with a support roller 45e serving as a support point.
The positioning platform 41 is raised and lowered by an amount corresponding to the eccentricity of C.

As shown in FIGS. 9 and 10, the first push-up holding means 46 includes a lifting platform 47 disposed below the preliminary bending die 2 and an inside of the preliminary bending die 2. Four push-up rods 4 erected on the lifting table 47 in the area
8 and an elevating drive mechanism 49 that moves the elevating table 47 up and down as appropriate, and the elevating drive mechanism 49 includes, for example, a drive motor 49a, a transmission shaft 49b that transmits the driving force of the drive motor 49a, The above lifting platform 47
A female threaded portion 49C formed in a part of this female threaded portion 4
9C and a ball screw 49e that is held upright via a support bracket 49d. Both are actuated via a gear mechanism (not shown) to transmit the driving force of the transmission shaft 49b to the ball screw 49e. A combination of two is used.

Furthermore, as shown in FIGS. 5, 11, and 12, the transport hoist 50 includes a sliding body 52 that slides along a guide rail 51 laid on the earthen wall of the transfer furnace 5. A plurality of hanging rods 53 protrude from the sliding body 52 through the upper wall slit 5a of the transfer furnace 5, and are attached to the hanging rods 53 to hold the two sheets of glass G. The four holding arms 54 for holding, the plurality of guide pulleys 55 attached to the sliding body 52, and the above-mentioned A drive wire 56 is appropriately stretched around the guide pulley 55 and provides a driving force for moving the sliding body 52.
It is made up of.

In this embodiment, the first push-up holding means 46
During the process of pushing up the blank glass G, the transport hoist 50 waits at a position where it does not interfere with the blank glass G, moves to the holding position at the position where the blank glass G is completely pushed up, and then moves to the holding position when the blank glass G is completely pushed up. In the process of the lowering of the lifting rod 48, the blank glass G is held by the holding arm 54.

Furthermore, as particularly shown in FIGS. 13 to 15, the alignment means 60 includes a push-up holding mechanism 61 that temporarily holds the blank glass G from the transport hoist 50 on the alignment stage Is, and a push-up holding mechanism. a plate alignment mechanism 70 that aligns the two sheets of glass held at 61;
It consists of a position adjustment mechanism 80 that adjusts the set position with respect to the main bending die 4.

The push-up holding mechanism 61 is provided with a first elevating table 63 that moves up and down along a guide column 62, and a movable frame is mounted on the first elevating table 63 via a sliding guide 64 along the moving direction of the transport hoist 50. 65 is slidably mounted, and on the movable frame 65, for example, four push-up rollers 6 are erected, and the drive motor 67a1 transmission shaft 67b1
The elevating platform 63 is moved up and down as appropriate by an elevating drive mechanism 67 consisting of a bevel gear mechanism 67C, a ball screw mechanism 67d, and the like.

In addition, the plate alignment mechanism 70 has a pair of movable bases 71 arranged to face each other in a direction perpendicular to the moving direction of the transport hoist 50 of the first lifting platform 63, and While the movable base 71 is slidably mounted via a sliding guide 72 along the
Each movable base 71 has a pair of plate alignment bars 73.
74 is set upright, and one plate alignment bar 73 is moved accurately to the plate alignment position by a drive actuator 75 using a ball screw mechanism, and the other plate alignment bar 74 is moved to the plate alignment position. The plate is advanced to the board alignment position using an air cylinder 76.

Furthermore, the position adjustment mechanism 80
A pair of second lifting tables 81 are provided outside the first lifting table 63 in the moving direction of the first lifting table 63 and are moved up and down along the guide columns 62 to transmit the driving force of the lifting drive machine #167 of the push-up holding mechanism 61. The second lifting platform 8 is connected to the drive transmission system 82.
1 is raised and lowered together with the first lifting table 63, and a measurement plate alignment bar 84 is slidably mounted on each second lifting table 81 via a sliding guide 83 along the moving direction of the transport hoist 50. A control actuator 85 consisting of a drive motor 85a such as a servo motor and a ball screw 85b moves the measurement plate alignment bar 84 forward and backward.
The drive motor 85 is in contact with the edge of the blank glass G.
The stop position of the measuring plate alignment bar 84 is determined by a control means (not shown) based on the current change information of a, and this control means sets the blank glass G to the normal position (setting position to the main bending die 4).
The amount of deviation from the position is calculated, and the movable frame 65 of the push-up holding mechanism 61 is displaced by a position correction mechanism 86 in order to correct the amount of deviation.

Furthermore, in this embodiment, the positioning means 90 of the main bending die 4 releases the engagement between the chain conveyor 35 and the cart 32 at the positioning stage H3, as shown in FIGS. 16 and 17 in particular. For example, a positioning lifting platform 91 disposed at a lower part corresponding to the trolley 32
a pair of stoppers 92 erected on the moving direction side of the main bending mold 4 on the positioning elevating table 91; and a side positioning stopper erected on one side of the main bending mold 4 on the positioning elevating table 91. 93 and the positioning lifting platform 91
A rectangular support frame 94 is slidably placed on the upper side along the width direction of the main bending mold 4, and four support rods 95, for example, are installed at each corner of this support frame 94.
and a positioning drive mechanism 96 for appropriately raising and lowering the positioning platform 91; and a positioning drive mechanism 96 that directs the support frame 94 toward the lateral positioning stopper 93 until the cart 32 comes into contact with the lateral positioning stopper 93 when the positioning platform 91 is raised. As the positioning drive mechanism 96, the same one as the first positioning means 40 is used, and the lateral positioning means 9
7 is composed of a drive motor 97a and a ball screw 97b.

The second push-up holding means 100 is made of the same components as the first push-up holding means 413, and is disposed at the lower part of the main bending mold 2, as shown in FIGS. 16 and 17. and four thrust ronds 1 erected on the lifting table 101 in the inner area of the main bending mold 4.
02, and an elevating drive mechanism 103 that moves the elevating table 101 up and down as appropriate.

Furthermore, in this embodiment, the positioning means 1.10 for the main bending mold 4 of the press processing stage PS is arranged to position the chain conveyor 35 and the trolley 32 in the press processing stage PS, as shown in FIGS. 18 and 19. It releases the engagement and has the same configuration as the positioning means 90 of the transfer furnace 5. Specifically, it includes a positioning lifting platform 111 disposed at a lower part corresponding to the truck 32, and this Positioning lifting platform 11
1, a pair of stoppers 112 erected on the traveling direction side of the main bending die 4, a lateral positioning stopper 113 erected on one side of the main bending die 4 on the positioning lifting platform 111, and the positioning lift A rectangular support frame 114 is slidably placed on the table 111 along the width direction of the main bending mold 4, and four support rods 115, for example 1F, are installed at each corner of this support frame 114. a positioning drive mechanism 116 that moves the positioning platform 111 up and down as appropriate;
It consists of a lateral positioning drive mechanism 117 that moves it toward the side.

The press means 7 of the press processing stage PS includes a guide column 121 erected on the upper wall of the main bending heating furnace 3, and an elevating plate 122 that slides vertically along the guide column 121. , this lifting plate 1
Attached to 22 is a hanging rod 123 that extends through the hole in the upper wall of the main bending heating furnace 3.
A pressing body 7a having a forming pressing surface 124 corresponding to the deep bending forming surface of the base glass G is fixed to 23, and further,
A frame 125 is attached to the upper end of the guide column 121, and a drive motor 126 such as a servo motor is attached to the frame 125.
26 and a lifting plate 122 etc. are operatively connected via a ball screw 127. During the pressing operation, the pressing means 7 gradually lowers the elevating plate 122 to a position where the forming pressing surface 124 of the pressing body 7a comes into pressure contact with the deeply bent portion of the blank glass G on the positioned main bending mold 4. It is designed to let you do so.

In addition, in this embodiment, the peripheral edge strengthening processing stage QS
In particular, as shown in FIG. 4, the first stage QS1 is set at an ambient temperature lower than the bending temperature of the base glass G, and the second stage QS1 is set at an ambient temperature even lower than this first stage QS1. The peripheral edge strengthening processing means 8 of this peripheral edge strengthening processing stage QS is separated into a second stage QS2, and the peripheral edge strengthening processing means 8 of this peripheral edge strengthening processing stage QS is made of two sheets press-formed from the main bending die 4 that is installed and heated in the first stage QS1. Cooling push-up holding means 1 for pushing up and holding the base glass G of
30, a reheating means 145 for reheating the periphery of the two sheets of blank glass G that are pushed up and held, and this reheating means 145.
and rapid drawing means 150 for rapidly drawing out the two sheets of blank glass G that have been reheated by the above process from the first stage QS1 to the second stage QS2.

The cooling push-up holding means 130 pushes up the push-up die 131 disposed inside the main bending die 4 and holds it in a predetermined position, particularly as shown in FIGS. 20 to 22. This is to hold the two sheets of raw glass G in a state separated upward from the main bending die 4.

In this embodiment, the push-up die 131 is provided with a ring-shaped frame 132 in which a support surface is formed along the inner side of the periphery of the blank glass G, and is hung downwardly from an appropriate location of the ring-shaped frame 132. It consists of four support legs 133 and a pair of locking bars 134 connected between the pair of support legs 133. The pair of locking bars 134 are connected to the trolley 32.
It is placed in an appropriately positioned state on a support plate 135 installed in a part of the support plate 135.
A locking support 136 having a receiving portion for locking and disengaging the locking bar 134 is provided on the top, and when the locking bar 134 is locked to the locking support 136, the push-up mold 1
31 ring-shaped frames 132 are arranged to protrude above the main bending mold 4.

The cooling push-up holding means 130 includes a guide post 138 erected at the lower part of the lower wall of the main bending heating furnace 3, and a lifting platform 13 along the guide post 138.
A movable frame 141 is slidably disposed on this elevating table 139 via a sliding guide 140 along the flow direction of the main bending mold 4. Four push-up rods 142 at the four corners
Further, the elevating table 139 is moved up and down via an elevating drive mechanism 143 consisting of a drive motor, a ball screw, etc., and the movable frame 139 is moved up and down via a horizontal drive mechanism 144 also consisting of a drive motor, a ball screw, etc. 141 is moved horizontally along a sliding guide 140.

Furthermore, in this embodiment, the push-up rod 142
In particular, as shown in FIG. 22, when the lifting platform 139 rises, it collides with the locking bar 134 on the support plate 135 of the push-up die 131, pushes up the push-up die 131, and moves the movable frame 141 horizontally. At times, the locking bar 134 is horizontally moved to a position corresponding to the locking support 136, and then lowered, and in this state, the locking bar 134 is locked to the locking support 136, A push-up die 131 is arranged at a position projecting upward from the main bending die 4.

Further, the reheating means 145, as shown in FIG. Only the periphery of the sheet of raw glass G is reheated.

Furthermore, as shown in FIG. 23 in particular, the rapid pull-out means 150 has a pair of support frames 151 disposed on both sides of the cooling push-up holding means 130, and a guide rail 152 on each support frame 151. A drawer mounting table 153 on which the trolley 32 of the main bending mold 4 is mounted is slidably mounted on each guide rail 152, while the drawer mounting table 153 on which the trolley 32 of the main bending die 4 is mounted is slidably mounted. The placing table 153 is slightly raised, and the drawer placing table 153 is rapidly pulled out from the first stage QS1 to the second stage QS2 by the rapid drawer drive system 155. In this embodiment, the elevating drive mechanism 154 includes a drive cylinder 154a1, a transmission shaft 154b, a bevel gear mechanism 154c, and an eccentric cam 154d.
and a support roller 154e attached to the support frame 151 and slidingly in contact with the circumferential surface of the eccentric cam 154d.
5, a pair of guide pulleys 156 are attached in the longitudinal direction of the support frame 151, and a drive chain 1 is moved forward and backward by a drive motor such as a servo motor (not shown).
57 over the pair of guide pulleys 156,
A drive chain 157 whose intermediate portion is fixed to the drawer mounting table 153 is used.

Next, the operation of the bending apparatus for laminated glass sheet glass according to this embodiment will be explained.

When bending and forming two sheets of raw glass G for laminated glass, first, as shown in FIGS. 3 and 24, a pair of flat glass sheets G for laminated glass are The glass plates G are stacked on the pre-bending die 2 in a state where the plates are aligned by an appropriate setting means. At this time, since the rigidity of the blank glass G is high to some extent, the movable split die 2b of the preliminary bending die 2 is held in an expanded state by being overcome by the moment of the balance weight 19.

In this state, when the blank glass G is carried into the preheating furnace 1, the blank glass G is heated to the glass bending temperature and gradually softens.

Then, as shown in FIG. 25, the rigidity of the base glass G decreases as the base glass G softens, and the base glass G
The portion excluding both sides of the glass gradually changes shape to follow the bending surface 13 of the fixed split mold 2a, while the base glass G
On both sides of the base glass G, the moment of the balance weight 19 overcomes the rigidity of the base glass G, and the movable split mold 2b gradually rises and finally reaches the set position S. Both sides of the mold are deep bent by their own weight along the bending surface 14 of the movable split mold 2b.

However, if the degree of deep bending of the raw glass G for laminated glass to be formed is large to a certain extent, the periphery of both sides of the raw glass G will deform along the bending surface 14 of the movable split mold 2b, but the raw glass The deformation of the parts other than the periphery on both sides of G does not follow, and the gap δ with respect to the original deep bending surface
As a result, the deep bending of both sides of the equal plain glass G becomes incomplete, and in the end, the pre-bending heating furnace 1 stops at the pre-bending process in which the blank glass G is temporarily formed.

As shown in FIG.
When the preliminary bending mold 2 is carried into the mold S, the positioning platform 41 of the positioning means 40 starts to rise, as shown in FIGS. 42, the support rod 44 lifts the truck 12 and connects the truck 12 with the chain conveyor 2.
At this stage, the preliminary bending die 2 is positioned on the positioning stage YS.

Next, the push-up rod 48 of the first push-up holding means 46 pushes up and holds the blank glass G to a predetermined position,
Raw glass G held up by the transport hoist 50
After being held by the holding arm 54, it is moved inside the transfer furnace 5.

Then, as shown in FIG. 5 and FIG. 27(a), when the transport hoist 50 reaches the alignment stage Is, the transport hoist 50 temporarily stops, and the push-up holding mechanism 61 of the alignment means 60 Hoist 50 base glass G
Push up and hold.

In this state, the plate alignment bar 7 of the plate alignment mechanism 70
3.74 advances from the position shown by the imaginary line' to the plate alignment position shown by the solid line in FIG. Even if it is, the positional deviation in the X direction in the figure is corrected with respect to the set position for alignment with the main bending die 4, but the positional deviation ε in the Y direction in the figure remains. After this, as shown in FIG. 27(C), the position adjustment mechanism 8
0 measurement bar 84 advances, and the position correction mechanism 86 moves the push-up rod 66 to correct the positional deviation ε based on the control information corresponding to the position information of the measurement bar 84 in contact with the blank glass G. Ru. At this stage, the blank glass G is placed at a set position for alignment with the main bending mold 4.

Thereafter, when the aligned blank glass G is carried by the transport hoist 50 to the positioning stage H8 of the main bending die 4, as shown in FIGS. 5 and 28, the main bending die 4 is moved to the positioning means. 90 is positioned in advance at a predetermined position. On the other hand, after the blank glass G is once pushed up and held by the pushing up rod 102 of the second pushing up holding means 100, the conveying hoist 50 returns to the original position. After it begins to bend, it moves downward and is placed on the main bending mold 4. At this stage, the transfer process of transferring the blank glass G from the preliminary bending die 2 to the main bending die 4 is completed.

Next, the blank glass G is transported to a press processing stage PS shown in FIG. 4. This press processing stage PS
In particular, as shown in FIG.
After that, the pressing body 7a of the pressing means 7 descends a predetermined amount downward, and the forming pressing surface 124 of the pressing body 7a presses the deep bending portion of the blank glass G on the main bending die 4. . At this stage, the deeply bent portion, which is an incompletely formed portion, of the raw glass G is formed into a regular shape along the pressing surface 7a of the pressing body 7a. Moreover, since the pressing body 7a is not in contact with the generally curved portion (shallowly bent portion) of the raw glass G, there is no fear that unnecessary press marks will be left on the surface of the generally curved portion of the raw glass G.

This final bending mold 4 is carried into a peripheral edge strengthening stage QS shown in FIG. This peripheral edge strengthening processing stage Q
In step S, first, as particularly shown in FIG. 30, the cart 32 of the main bending die 4 is positioned and placed on the drawer mounting table 153 of the rapid drawer means 150 by abutting against a stopper not shown. In this state, the cooling push-up holding means 1
30 pushes up the push-up die 131 to push up and hold the blank glass G in a state where the periphery of the blank glass G is separated from the main bending die 4. Thereafter, the periphery of the above-mentioned pushed-up and held blank glass G is locally reheated by the reheating means 145, and this blank glass G is heated by the rapid drawing means 150.
With the rapid drawing operation of the drawer mounting table 153, it is rapidly drawn out from the first stage QSI to the second stage QS2 and rapidly cooled.

In this operation process, the periphery of the raw glass G is rapidly cooled after being reheated, so that the raw glass G
The degree of cooling at the periphery is greater than other parts, and
The peripheral edge strengthening process of the base glass G can be performed more reliably. In addition, in this embodiment, the main bending die 4 and the base glass G
Since the contact state with the blank glass G is released, when cooling the periphery of the blank glass G, there is no inflow of heat from the main bending die 4 side, so that the blank glass G can be cooled smoothly.

At this stage, the main bending process of the raw glass G is completed. Then, the blank glass G after the main bending process is taken out by a take-out means such as a board hoist at an appropriate take-out stage, and the main bending die 4 after the main bending process is carried out on the circulation conveyance path 10 in FIG. After the push-up mold 131 is returned to its original position midway, the material is circulated and supplied to the main bending heating furnace 3 again.

Embodiment 2 FIG. 31 is a schematic diagram showing another embodiment of a bending and forming apparatus for a blank glass for laminated glass.

In the same figure, the basic configuration of the apparatus is almost the same as that in Embodiment 1, but unlike Embodiment 1, the preliminary bending heating furnace 1 and the main bending heating furnace 3 are connected linearly via a transfer furnace 5. The circulation path of the pre-bending die 2 of the pre-bending heating furnace 1 and the main bending die 4 of the main-bending heating furnace 3 is connected to the transfer stage As of the transfer furnace 5.
A transfer means 6 having a configuration different from that of the first embodiment is incorporated in the transfer stage As.

In this embodiment, the transfer means 6 specifically positions the preliminary bending die 2 on the transfer stage As and removes the preliminary bending die 2 toward the circulation conveyance path. When the first positioning moving table 161 and the preliminary bending die 2 are removed from the transfer stage AS, the main bending die 4 is positioned on the transfer stage As, and when the setting operation of the blank glass G is completed, the original bending die 4 is moved back to the original position. The second positioning moving table 162 that retreats back to the position and the transfer stage A
a push-up holding means 163 that is installed below the transfer stage As and holds the blank glass G pushed up; and a suspension holding means that is installed above the transfer stage As and hangs and holds the pushed-up blank glass G. It consists of 164.

Note that the same constituent members as those in the first embodiment are given the same reference numerals as those in the first embodiment, and detailed explanation thereof will be omitted here.

Next, a transfer process operation unique to the bending and forming apparatus for laminated glass base glass according to this embodiment will be explained.

Two sheets of glass G temporarily formed in the pre-bending heating furnace 1
is transported to the transfer stage As together with the preliminary bending die 2, as shown in FIG. At this time, the preliminary bending mold 2
is positioned by the first positioning moving table 161, the pushing-up holding means 163 pushes up and holds the two sheets of blank glass G, and then the hanging holding means 164 moves the two pieces of blank glass G. is held suspended, and the thrust holding means 163 descends to its original position.

After that, as shown in FIG. 34, the first positioning movable table 161 moves and conveys the preliminary bending die 2 to remove it from the transfer stage As, and then the second positioning movable table 164 moves to remove the preliminary bending die 2 from the transfer stage As. The main bending mold 4 is transported to the transfer stage AS and positioned.

In this state, the push-up holding means 163 rises again, pushes up and holds the blank glass G held by the hanging holding means 164, and then moves downward. Then,
The blank glass G which is pushed up and held by the pushing up holding means 163 is positioned and set on the main bending mold 4. Thereafter, the second positioning movable table 164 returns to its original position, and the main bending die 4 and the cart 32 proceed to the main bending heating furnace 3.

In such an operation process, there is no need to move the blank glass G in the horizontal direction, so the positioning means 60 as in the first embodiment is not required.

[Effects of the Invention] As described above, according to the method and apparatus for bending a blank glass for laminated glass according to claims 1 to 13, two blank glass sheets for laminated glass are pre-bent and heated in a heating furnace. After pre-forming by using its own weight in the pre-bending mold, the two pre-formed blank glass sheets are placed on the main bending mold of the main bending heating furnace, and the incompletely formed parts are partially pressed. This correction has the following basic effects.

In other words, even if the sides of the raw glass for laminated glass have a large degree of deep bending, the sides of the two raw glasses for laminated glass can be reliably deep bent. The degree of freedom in shaping the glass plate can be increased.

Additionally, when deep bending raw glass for laminated glass to give it a desired curvature, there was a problem in the past in that a complicated process called an oversize processing method had to be performed, but according to these inventions, By using raw glass for laminated glass that has been cut to dimensions that match the shape of the laminated glass to be obtained, it is possible to obtain laminated glass that is deeply bent and has the desired peripheral curvature. It is possible to easily manufacture shaped laminated glass and to reduce costs.

Furthermore, when deep bending raw glass for laminated glass, the bending molds are changed in the pre-bending heating furnace and the main bending heating furnace, so that temporary forming by self-weight bending and main forming by press bending can be performed efficiently. As a result, there is no need to clamp the movable split die of the bending die for self-weight bending during main forming, and the clamping operation time can be omitted, allowing for bending and forming of two sheets of glass for laminated glass. It is possible to easily realize a mass production system without reducing production tact.

Further, according to the method and apparatus for bending a blank glass for laminated glass according to claims 2 and 9, the blank glass can be replaced without intersecting the conveyance lines of the preliminary bending die and the main bending die. Therefore, it is possible to independently configure the transfer device without particularly considering interference between the preliminary bending die and the main bending die.

Furthermore, according to the method for bending and forming blank glass for laminated glass according to claim 3, the blank glass can be transferred from the preliminary bending die to the main bending die at the same work stage. When replacing the plate glass, there is no need to perform alignment with respect to the main bending mold, and the alignment step can be omitted.

Furthermore, according to the method of bending and forming a blank glass for laminated glass according to claim 4, in the main bending step, the side portion of the blank glass is pushed from a direction substantially perpendicular to the bending surface of the deep bending part of the blank glass. Since this is done, it is possible to effectively reduce the occurrence of wrinkles at the deeply bent portions of the raw glass.

Further, according to the method and apparatus for bending blank glass for laminated glass according to claims 5 and 11, two sheets of blank glass that have been press-processed in the press processing stage are separated from the main bending die and held. As a result, when cooling the two pieces of raw glass in the return process, it is possible to effectively prevent heat from flowing into the raw glass from the main bending die, thereby improving the cooling efficiency for the two pieces of raw glass. Can be done. In particular, when cooling the periphery of two pieces of blank glass, cooling loss at the periphery of the blank glass to be cooled can be directly prevented, which is extremely effective.

Furthermore, according to the method and apparatus for bending a blank glass for laminated glass according to claims 6.12 and 13,
Since the periphery of two pieces of raw glass that has been press-processed in the press processing stage can be rapidly cooled, the periphery of the two pieces of raw glass can be strengthened, and cracking of the raw glass can be effectively prevented. Can be done. In particular, according to the thirteenth aspect of the present invention, the peripheral edge of the blank glass can be rapidly cooled with a temperature difference, so that the peripheral edge strengthening process of the blank glass can be made more reliable.

Furthermore, according to the apparatus for bending and forming blank glass for laminated glass according to claim 8, the corresponding bending molds can be continuously conveyed at predetermined time pitch intervals in each heating furnace. It is possible to efficiently realize a mass production system for deep bending and forming raw glass.

Furthermore, according to the apparatus for bending and forming blank glass for laminated glass according to claim 10, since the pressing means is installed in the press processing stage, the blank glass and the main bending die are pressed together in the main bending heating furnace. It is no longer necessary to heat the press unnecessarily, and the thermal efficiency of the main bending heating furnace can be improved accordingly.In addition, it is possible to suppress deterioration of the press means due to heat and improve durability. In a system that mass-produces bent blank glass using molds, there is no need to attach press means for each means of transporting each bending mold, so the number of parts of the bending machine for blank glass for laminated glass is reduced. can be reduced, and the device configuration can be simplified accordingly.

[Brief explanation of the drawing]

FIG. 1(a) is an explanatory diagram showing a method for bending and forming blank glass for laminated glass according to the present invention, and FIG. 1(b) is a schematic configuration of a bending and forming apparatus for blank glass for laminated glass according to the present invention. FIG. 2 is a schematic diagram showing Embodiment 1 of the bending and forming apparatus for blank glass for laminated glass according to the present invention, and FIGS. 3 to 5 are along lines m-m and rV in FIG. -r
6 is a perspective view showing a specific example of the pre-bending mold used in Example 1, FIG. 7 is a view in the direction of arrow X in FIG. The figure is a perspective view showing a specific example of the main bending die used in Example 1, FIG. 9 is a detailed view of the part ■ in FIG. Fig. 11 is an explanatory diagram showing details of the conveyance hoist used in Example 1, Fig. 12 is a view in the direction of the arrow X in Fig. 11, and Fig. 13 is a detailed view of the X Figure 14 and 1st
5 is a side view and a plan view of the same, FIG. 16 is a detailed view of the X direction in FIG. 9, FIG. 17 is a view taken from the X direction in FIG. ■ Detailed view of the section, Figure 19 is the 18th
The arrow view seen from the XIX direction in the figure, Figure 20 is the X in Figure 4.
FIG. 21 is an explanatory view showing details of the cooling push-up holding means used in the first embodiment; FIG. 22 is a perspective view showing details of the X section;
The figure is a schematic diagram showing the relationship between the cooling push-up holding means and the push-up mold, FIG. 23 is an explanatory diagram showing details of the rapid pull-out means used in Example 1, and FIGS. 24 and 25 are preliminary bending A schematic diagram showing the operation process of the process, FIG. 26 is an explanatory diagram showing the process of separating the blank glass from the preliminary bending die in the transfer process, and FIG. 27(a) is an explanatory diagram showing the alignment process in the transfer process. , Figures (b) and (C) are plan explanatory diagrams showing the details of the operation process, Figure 28 is an explanatory diagram showing the process of placing the blank glass on the main bending mold in the transfer process, and Figure 29 is the explanatory diagram showing the process of placing the blank glass on the main bending mold. FIG. 30 is an explanatory diagram showing the press processing step of the bending process. FIG. 30 is an explanatory diagram showing the peripheral edge strengthening process of the main bending process. FIG.
FIG. 32 is an explanatory diagram showing a specific example of the transfer means used in the second embodiment, and FIGS. 33 and 34 are explanatory diagrams showing the transfer process of the second embodiment. [Explanation of symbols] G... Raw glass PS... Press processing stay sheet... Pre-bending heating furnace 2... Pre-bending mold 3... Main bending heating furnace 4... Main bending mold 5... Transfer furnace 6...Transfer means 7...Press means Fig. 5 Fig. 6 Patent applicant Asahi Glass Co., Ltd. Agent
Patent Attorney Masahiro Koizumi (3 others) Fig. 10 Fig. 11 Fig. 5 et al. 12 Fig. 14 Fig. 15 Fig. 17 Fig. 16 Fig. et al. 18 Fig. 19 Fig. 21 Fig. 22 Fig. 24 Fig. 27 Figure 28

Claims (1)

[Claims] 1) When stacking two pieces of raw glass (G) for laminated glass and simultaneously bending them so that the sides of the raw glass (G) are bent deeply, Two pieces of glass blank (G) are placed on a pre-bending die (2) for self-weight bending, which has a movable split die (2b) at a location corresponding to the bending part, and placed inside the pre-bending heating furnace (1). The above two pieces of raw glass (G) are heated to the glass bending temperature and bent under their own weight, and the movable split mold (2b
) is displaced so that the two sheets of raw glass (
A pre-bending step (A) in which the glass (G) is pre-formed; and a pre-bending step (A) in which the two pre-formed blank glass sheets (G) are transferred from the pre-bending mold (2) in the pre-bending heating furnace (1) to the main bending heating furnace (3).
), the forming surface of the blank glass (G) is transferred to the final bending mold (4) in which the forming surface is fixedly formed in advance (B), and the final bending heating furnace ( 3)
A pre-bending heating furnace (
A blank glass for laminated glass comprising a final bending step (C) of pressing the deep bending portion of the two blank glass sheets (G) temporarily formed in step 1) against the deep bending corresponding portion of the final bending mold (4). bending method. 2) In the method according to claim 1, the transfer step (B) comprises:
Two pieces of blank glass (
A lifting process of lifting the two pieces of blank glass (G), a moving process of moving the lifted two pieces of blank glass (G) in a substantially horizontal direction, and a process of moving the two pieces of blank glass (G) against the main bending mold (4) during this moving process. G), and a mounting step for mounting the two aligned glass blanks (G) on the main bending die (4) at the end of the moving process. A method for bending and forming raw glass for laminated glass, characterized by: 3) In the method according to claim 1, the transfer step (B) comprises:
Two pieces of blank glass (
G), a lifting and holding step of once lifting and holding the preliminary bending mold (2), a preliminary bending mold removal step of moving the preliminary bending mold (2) to the outside from the work stage where this lifting and holding step is performed, and a preliminary bending mold (2) After moving from the work stage to the outside, the main bending mold (4) is moved and installed at a predetermined position on the work stage, and after the main bending mold setting step is completed, the above-mentioned two sheets of raw glass (G) are set. A method for bending and forming blank glass for laminated glass, comprising the step of placing the glass on a main bending die (4). 4) The method according to any one of claims 1 to 3,
The main bending process (C) is for laminated glass, characterized in that the deep bending part of two pieces of raw glass (G) for laminated glass is pressed in a substantially perpendicular direction at the press processing stage (PS). A method of bending and forming raw glass. 5) The method according to any one of claims 1 to 4,
The main bending process (C) is a separation and holding process in which the two glass blanks (G) are separated and held from the main bending mold (4) after the press process at the press process stage (PS) is completed. A method for bending and forming raw glass for laminated glass, the method comprising: 6) The method according to any one of claims 1 to 5,
The main bending process (C) is characterized by including a peripheral edge strengthening process in which the peripheral edges of the two sheets of glass (G) are rapidly cooled after the press process in the press process stage (PS) is completed. A method of bending and forming raw glass for glass. 7) A bending and forming device for blank glass for laminated glass, which overlaps two sheets of blank glass (G) for laminated glass and simultaneously bends and forms the sides of the blank glass (G) so that the sides thereof are deeply bent, A pre-bending heating furnace (1) heated to the bending temperature of the blank glass (G), and a pre-bending heating furnace (1) which is movably disposed within the pre-bending heating furnace (1) and which is heated to the bending temperature of the blank glass (G).
Bending forming surface (13) corresponding to the general curved part to be formed in G)
) with the fixed split mold (2a) and the above blank glass (G
) has a bending forming surface (14) corresponding to the deep bending part to be formed, and the fixed split mold (2a) is attached to the end of the fixed split mold (2a) by its own weight.
It consists of a movable split mold (2b) that is movably provided so as to move in the direction connected to a), and two pieces of raw glass (G) are placed on top of each other so as to straddle the split molds (2a, 2b). When the glass bending temperature environment is reached, the movable split mold (2
a preliminary bending die (2) in which b) moves to a set position (S) connected to the fixed split die (2a); and a main bending heating furnace (in which the ambient temperature is heated to the bending temperature of the blank glass (G)). 3), and the above-mentioned blank glass (G) is movably arranged in this main bending heating furnace (3).
A main bending die (4) having a bending surface (33) corresponding to the curved part to be formed, and a pre-bending heating furnace which is connected in communication with the pre-bending heating furnace (1) and the main bending heating furnace (3). (1) A transfer furnace (5) maintained at a temperature that maintains the shape of the blank glass (G) temporarily formed in the transfer furnace (5); Bending mold (2)
A transfer means (6) for transferring the blank glass (G) temporarily formed above onto the main bending mold (4), and a press processing stage (PS) in the main bending heating furnace (3).
), which has a pressing body (7a) formed with a curved surface corresponding to the lateral deep bending part to be formed of the raw glass (G), and also has a pressing body (7a) formed with a curved surface corresponding to the deep lateral bending part of the raw glass (G).
) with the pressing body (7a) for final bending (4).
1. A bending and forming device for blank glass for laminated glass, characterized in that it is equipped with a press means (7) for pressing toward. 8) The product according to claim 7, wherein a plurality of pre-bending dies (
2) and the main bending mold (4) respectively correspond to the heating furnaces (1, 3).
) A bending and forming device for blank glass for laminated glass, which is characterized by circulating the glass. 9) The device according to claim 7 or 8, wherein the transfer means (6) is configured to move the two parts on the pre-bending mold (2) at the stage of entry of the pre-bending mold (2) into the transfer furnace (5). A first push-up holding means (46) that pushes up and holds a sheet of blank glass (G) upward; and two pieces of blank glass (G) held by this first push-up holding means (46). A conveying means (50) that holds the main bending mold (4) from above and conveys it to the stage where it enters the transfer furnace (5); and this conveying means (50).
a positioning means (60) for aligning the two sheets of raw glass (G) to the main bending mold (4) during transport, and a main bending mold (4) into the transfer furnace (5). 4) A second push-up holding means (100) for holding the two sheets of blank glass (G) transported from the bottom side and placing them on the main bending die (4). A bending and forming device for raw glass for laminated glass, which is characterized by: 10) The product according to any one of claims 7 to 9,
The press means (7) is a press processing stage (PS)
Bending and forming of raw glass for laminated glass, characterized in that it is equipped with a support (123) that is installed to move forward and backward at the support body (123), and a pressing body (7a) that is attached to this support (123). Device. 11) In the product according to any one of claims 7 to 10, a press processing stage (P
The present invention is characterized by the provision of separating and holding means (130, 131) for separating and holding the two sheets of glass (G) from the main bending die (4) at the time when the pressing process in step S) is completed. Equipment for bending and forming raw glass for laminated glass. 12) In the product according to any one of claims 7 to 11, a press processing stage (P
At the end of the pressing process in step S), the two sheets of glass (G) are transferred to the edge strengthening processing stage (Q) where there is a difference in ambient temperature.
An apparatus for bending and forming raw glass for laminated glass, characterized in that it is provided with a rapid drawing means (150) that is rapidly drawn out to the side where the ambient temperature is lower at S). 13) In the product according to any one of claims 7 to 11, a press processing stage (P
A reheating means (145
), and the two sheets of raw glass (G) reheated by the reheating means (145) are rapidly pulled out to the side with a lower ambient temperature at a peripheral strengthening processing stage (QS) where there is an ambient temperature difference. 1. An apparatus for bending and forming blank glass for laminated glass, characterized in that it is provided with a rapid drawing means (150).