JPH0251435A - Method and apparatus for bending formation of material glass for laminated glass - Google Patents

Abstract

PURPOSE:To increase the freedom of forming shape by preliminarily forming a softened glass plate into the shape almost along the split type mold and then correcting the imperfect parts with partial pressing. CONSTITUTION:Two material plate glass 1 to be laminated is placed on a bending mold 10 consisting of a fixed split mold 11 having a required forming surface 11a and movable split molds 12 having a bending surface 12a corresponding to a deep bending part of the glass 1, and is preliminarily bent into the shape almost along the bending mold 10 after heated to the bending process temp. of the glass 1. Then the movable split molds 12 are fixed to the fixed split mold 11, and the press formation of the glass 1 is simultaneously carried out by pressing with auxiliary press members from the upper part of the glass 1 having deep bending part placed on the bending mold 10.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method and an apparatus for simultaneously bending and forming two sheets of laminated blank glass for laminated glass in a heating furnace.
In particular, the present invention relates to a method for bending and forming laminated blank glass for laminated glass that is optimal for deeply bending the side portions of laminated glass, and improvements to the apparatus.

[Prior Art] Generally, laminated glass is made by laminating two sheets of laminated glass with a plastic interlayer film such as a polyvinyl butyral film, and from a safety standpoint, it is especially used as a windshield for automobiles. Widely used.

By the way, this type of laminated glass is usually required to have a curved shape for reasons of automobile design, so for the two sheets of laminated raw glass for laminated glass, it is possible to suitably bend and form flat sheets. It becomes necessary. At this time, if the two laminated glass sheets are molded separately, the curved shapes of the two laminated glass sheets will be slightly different. There are disadvantages in that the bonding is not done through an interlayer film, bubbles are generated on the bonding surface, or bubbles are generated on the bonding surface of the laminated glass during use, and the glass peels off. For this reason, conventionally, when manufacturing laminated glass, a method has been adopted in which two sheets of laminated glass are stacked and bent at the same time.

The conventional method for bending and forming laminated blank glass for laminated glass is to construct a bending die that corresponds to the bending surface of the laminated glass, and to place two pieces of laminated blank glass for laminated glass on top of this bending die. At the same time, the bending die is carried into a heating furnace in the state in which the double laminated blank glass is heated to its glass softening temperature, and as both glasses soften, the double laminated blank glass is moved along the bending surface of the bending die. It is known that the product is bent under its own weight (Special 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 fixed split mold having a bending surface corresponding to the intermediate curved part of the laminated glass and the side part of the laminated glass are used. A ring-shaped movable split mold 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 purchasing the above bending mold and placing two flat sheets of raw glass on top of each other on the bending mold with the movable split mold unfolded, the raw glass is carried into a heating furnace and heated. However, a self-weight bending method has already been provided in which the movable split mold is moved in a direction continuous with the fixed split mold as both glasses soften, and the sides of both glasses are deeply bent by the movable split mold. There is.

[Problems to be Solved by the Invention] However, in such a conventional method of bending and forming blank glass for laminated glass, when deep bending the sides of double laminated blank glass for single laminated glass, it is difficult to bend the sides of the double laminated blank glass for one laminated glass due to its own weight. The sides of the pixel plate glass are forcibly bent using a movable split mold that moves, but when increasing the degree of deep bending of the sides of the laminated glass, it is necessary to change the peripheral shape of the deeply bent part of the pixel plate glass. Although it is possible to form the pixel plate glass into a shape that follows the movable split mold, the degree of deformation of the softened blank glass cannot be followed to create the desired curvature surface for the surface shape of the curved part of the pixel plate glass except for the periphery of the deep bending part. This results in a problem that the deeply bent portion of the pixel plate glass becomes insufficiently formed.

It is also possible to heat the part to be deeply bent more locally to facilitate the bending process, but even this is still insufficient.

In order to solve this problem, a press method in which a glass plate is sandwiched between a concave mold and a convex mold may be applied as a method to form the surface shape accurately, but it is difficult to form laminated glass. In some cases, two sheets of laminated blank glass must be molded at the same time, so it is necessary to accurately position and hold the two sheets of laminated blank glass during molding. However, even when attempting to hold two pieces of laminated blank glass using known methods such as hanging or suction, it was not possible to accurately position and hold both pieces of laminated blank glass, and in the end, the above pressing method was not used. There was a problem that it could not be applied as is.

Alternatively, in order to solve this problem, two pieces of laminated blank glass are prepared that are larger than the design dimensions of the laminated glass to be obtained so that the side parts of the glass plates can be easily bent. Oversize processing involves stacking and simultaneously bending two oversized pieces of laminated blank glass to obtain the desired molded shape, and then cutting the periphery to obtain two pieces of laminated blank glass for laminated glass with the desired design dimensions. There are other methods, but they have the disadvantage of requiring a cutting process after bending, which is time consuming and costly.

The present invention has been made in view of the above-mentioned problems, and provides a method and apparatus for bending a laminated blank glass for laminated glass, which can reliably deep bend the side portion of the laminated glass. This is the issue.

[Means for Solving the Problems] That is, the method of bending and forming laminated blank glass for laminated glass of the present invention that achieves the above-mentioned problems involves stacking two sheets of laminated blank glass for laminated glass and bending the sides of both laminated blank glasses. When simultaneously bending and forming a part to be deeply bent, two sheets of laminated raw glass are placed on a bending die equipped with a movable split die and a fixed split die having the desired forming surface, and placed on this bending die. The two sheets of laminated raw glass are heated to the bending temperature of the glass in the heating and bending processing stage in a heating furnace, and the two sheets of laminated raw glass are bent under their own weight into a shape that roughly follows the bending mold. The movable split mold is then fixed to the fixed split mold, and the deeply bent portion of the laminated blank glass is placed on the bending mold from above the two stacked laminated blank glasses. The present invention relates to a method for bending and forming laminated blank glass for laminated glass, characterized in that two sheets of laminated blank glass are simultaneously press-molded by pressing with an auxiliary press member.

Further, the apparatus for realizing the above-mentioned method for bending and forming raw glass for laminated glass is a laminated glass that simultaneously bends and forms two sheets of laminated glass for laminated glass so that the sides of both laminated glass sheets are deeply bent. A bending and forming device for laminated blank glass for use, comprising a fixed split mold having a bending surface corresponding to the intermediate curved part to be formed of the laminated blank glass, and a movable mold having a bending surface corresponding to the deep gap part to be formed. Equipped with a split mold ^
A split mold type bending mold.

An auxiliary press member provided above the bending die and corresponding to the lateral blank area to be formed of the laminated blank glass, and an elevating mechanism for the auxiliary press member, and the above-mentioned when pressing the laminated blank glass. A bending and forming apparatus for laminated blank glass for laminated glass, characterized by comprising a fixing means for fixing a movable split mold to the fixed split mold.

In such technical means, when bending and forming two sheets of laminated blank glass for laminated glass, the configuration of the heating and bending furnace is such that at least the laminated blank glass to be formed is heated to the softening temperature of the glass. The design may be modified as appropriate as long as it includes a heating/bending processing stage for heating and a press processing stage for deep bending the side portion of the heat-softened laminated blank glass using an auxiliary press member. In this case, from the viewpoint of maintaining good bending formability, in the heating bending processing stage, the sides of the laminated blank glass to be deep bent are locally heated to a higher temperature than other parts. It is preferable to do so. For such local heating, it is preferable to arrange a local heater close to the upper side, the lower side, or the upper and lower sides of the portion of the two laminated blank glass sheets to be deep bent.

In addition, as the above-mentioned conveyance means for two sheets of laminated glass,
As long as the bending mold can be transported in the heating/bending furnace, the cart may be moved along a predetermined circulation path or forward/backward path, or it may be moved from a heat-resistant transport roll or belt, etc. The design may be changed as appropriate, such as by using a continuous conveyor. In this case, regarding the conveyance means, since the relative positional relationship between the bending mold on the press processing stage and the auxiliary press means equipped with the auxiliary press member must be accurate, mechanical positioning means may be attached or It is necessary to control the positioning of the conveying means using a control system.

Furthermore, the above-mentioned auxiliary press means should not interfere with the bending die when the bending die reaches the press processing stage (i.e., the object of forming the laminated blank glass of the bending die set at the set position on the press processing stage). As long as the side part of the laminated blank glass is pressed by the auxiliary press member from a direction substantially perpendicular to the bending surface corresponding to the intermediate curved part, the design may be changed as appropriate.Then, as the installation location of the above-mentioned auxiliary press member. This is because it is easy to accurately determine the relative positional relationship with the bending die, and also because of the thermal efficiency at the heat treatment stage.
Considering the durability of the auxiliary press member support mechanism, it is preferable to install it at an appropriate location on the press processing stage above the bending die. Furthermore, the shape of the auxiliary press member may be pipe-shaped or may be formed to correspond to the entire deep bending group of laminated glass, but at least it can be formed only at the heating and bending processing stage. It is preferable to form it corresponding to a deep bend with a large curvature where forming is likely to be incomplete. Further, when bending the deeply bent portion into a shape with partially different curvatures, an auxiliary press member having a press surface having a different curvature according to the bent shape is used.

[Operation] According to the above-mentioned technical means, two pieces of laminated blank glass for laminated glass placed on a split-type bending mold having a movable split mold and a fixed split mold are heated and heated. After being heated to the glass softening temperature in the heating and bending processing stage in the bending furnace and temporarily formed into a shape that roughly follows the bending die, the incompletely formed parts of the two temporarily formed laminated blank glass sheets, Specifically, deep bending of the laminated blank glass is done after the movable split mold is fixed to the fixed split mold at the press processing stage located after the heating and bending processing stage in the heating and bending furnace. , is partially press-formed along the deep bending corresponding portion of the bending die.

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

The present invention is applied to a bending system for laminated blank glass for laminated glass, which deep bends both sides of the laminated blank glass for laminated glass.

In the same figure, a pair of laminated blank glasses for laminated glass are stacked on a bending mold 10, and a conveying means 25 consisting of a cart 26 is moved via a chain conveyor (not shown).
After passing through the heating and bending processing stage STI in the heating and bending furnace 2 and the press processing stage ST2 together with the bending die IO, it is transported to the cooling processing stage ST3 outside the heating and bending furnace 2. ing. Then, in the heating/bending process stage STI, the heating furnace 2
The laminated blank glass 1 is heated to the glass softening temperature (550 to 650° C.) by the heater 3 in the interior to soften it, and is temporarily formed approximately along the forming surface of the bending die 10. In the press processing stage ST2, the laminated blank glass 1 is heated by the auxiliary press means 30. The incompletely formed part of the deep bending part of the laminated blank glass 1 is partially press-formed, and in the cooling treatment stage ST3, the press-formed laminated blank glass 1 is pressed to prevent undesirable distortion from occurring. is gradually cooled while moving on the bending mold 10 at a controlled cooling rate for a predetermined period of time, and then the two laminated blank glass sheets 1 that have been carried out from the cooling treatment stage ST3 and formed are left to cool. There is.

As a bending die for self-weight bending on which two laminated blank glass sheets are placed, the forming temperature of the glass plate in the heating/bending furnace (
A type of heat-resistant material that can withstand temperatures of 580 to 700°C) is constructed so that it has a bending surface corresponding to the intermediate curved part to be formed of the laminated blank glass and a bending surface corresponding to the original bending part to be formed. It can be used preferably. The configuration of such a bending mold may be either a planar shape that is compatible with the laminated base glass or a ring shape that can support the periphery of the laminated base glass, but in order to maintain the smooth surface of the laminated base glass, A ring-shaped mold is preferable in that it minimizes the contact area between the surface of the laminated blank glass and the bending mold.In the present invention, the automatic processing bending mold is divided into a fixed split mold and a movable split mold. It is a split type that is constructed in such a way that it

The split-type bending die illustrated in FIG. 2 is placed on a carriage 26 of the conveyance means, and the bending die corresponds to the central curved portion of the deep-bent laminated blank glass 1 excluding both sides. A ring-shaped fixed split mold 11 having a ring-shaped fixed split mold 11a, and a bending surface 12a that is movably provided on both sides of the fixed split mold 11 and corresponds to the deep bending part of the laminated blank glass 1, and this bending surface 12a is composed of a ring-shaped movable split die 12 which is connected to the bending surface 11a of the fixed split die 11 at the set position. The fixed split mold 11 is fixed on the trolley 26 via the support jl13, while the movable split mold 12
Both sides in the width direction are swingably supported via a pivot shaft 16 at the tip of a support column 15 erected on a fixed bracket 14 on a truck 26 . Further, a balance weight 17 is attached to the support portion of the movable split mold 12 via a moment arm 18 so that the movable split mold 12 is urged toward the set position side where it is connected to the fixed split mold 11. In addition, in FIG. 2, (a) shows the flat laminated blank glass placed on the bending mold before heating the laminated blank glass,
fb) in FIG. 2 shows the state in which the bending process of the laminated blank glass is completed. FIG. 2C is a schematic plan view for explaining the split state of this bending die. In addition, the design of the movable split mold may be changed as appropriate as long as it moves in the direction connected to the fixed split mold by its own weight and stops at the set position connected to the fixed split mold. The return force can be adjusted by the components and weights of the movable split mold itself.

In addition, on the outside of the side edge of the laminated blank glass on the periphery of the movable split mold corresponding to the deep bending part to be formed of the laminated blank glass of the bending die, there is a part protruding from the end of the bending die as shown in Figures 2 and 12. It is preferable to attach a taper J-ring 40 having a taper angle corresponding to the curved shape of the periphery of the laminated blank glass. Alternatively, a structure may be adopted in which the peripheral edge of the mold itself protrudes from the end. This taper ring 40 or the contact surface of the protrusion on the periphery of the mold with the lower surface of the end of the laminated blank glass has a forming surface that matches the design shape of the desired laminated glass, and during press molding, the end of the laminated blank glass The shape is such that it supports the part so that it can be molded into a desired shape. Therefore, when temporarily forming two pieces of laminated raw glass on a bending mold by gravity, only the 90.91 end of the laminated raw glass comes into contact with the supporting surface of the tapering, as shown in Figure 12, and the laminated raw glass is The plate glass 91 is supported with a gap between the lower surface 91 and the forming surface 42 of the tapered J-ring 40, and the fitting is performed by contacting the forming surface 43 of the bending die 12 and the forming surface 42 of the taber ring 40 during temporary forming. It is possible to prevent the occurrence of holy spots on the inner side of the lower edge of the raw glass. Thereafter, the auxiliary press member 52 presses the periphery of the laminated blank glass to obtain a desired shape in which the periphery matches the forming surface 42 of the tapered ring 40 and the forming surface 43 of the end of the bending die 12. The tapered ring 40 or the protruding portion on the periphery of the mold may be provided in the necessary deep bending portion of the bending mold, and does not necessarily need to be provided on the entire side of the bending mold.

When using such a split mold type bending die, one feature of the present invention is to attach a device to prevent the movable split mold from jumping up in the deep bending part during press forming. shall be.

As the bounce-up prevention device, the design may be changed as appropriate as long as it can fix the movable split die 12 of the bending die 10 at the set position on the press processing stage within a range that does not interfere with the pressing operation by the auxiliary press means 30. (The location and number of clamps can also be selected as appropriate.

The example shown in FIG. 3.4 shows an example of a press forming apparatus after temporary forming of laminated blank glass, which is equipped with a device to prevent the movable split mold from jumping up.
When the auxiliary press member 52 press-forms the laminated blank glass 53 around the periphery of the glass, the movable split die 51 fixes the two laminated blank glasses 53 at an optimal position to ensure the desired bending shape, and prevents the two laminated blank glasses 53 from jumping up. A movable split type locking member 54 is provided to prevent this. A connecting arm 55 is connected to this locking member 54, and this connecting arm 55 is connected to a bracket 57 attached to a trolley 56 by a hinge 58, and the other end of this connecting arm 55 has an engaging portion. 59 are provided. When the auxiliary press means 60 is lowered, the push-down member 60 of the engaging portion 59 provided on the auxiliary press means 52 is lowered, and the auxiliary press member 52 is pressed before the deep concave portion of the laminated blank glass 53 comes into contact with it. The push-down member 60 in contact with the engaging portion 59 is connected to the connecting arm 5
5, the locking member 54 of the connecting arm 55 rises around the hinge 58, the movable split die 51 is fixed, and the auxiliary press member 52 presses the deep concave portion of the laminated blank glass. During processing, the movable split mold 51 is prevented from moving. After the pressing of the deep concave portion by the auxiliary press member 52 is completed, as the auxiliary press means 60 rises, the engagement portion 59 of the connecting arm 55 and the push-down member 0 are released from contact and locked. The member 54 and the movable split mold 51 are disengaged, and the movable split mold is released from being fixed.

Further, as shown in FIG. 3, the auxiliary pressing means includes an auxiliary pressing member 52 provided at a desired position above a portion of the bending die 50 corresponding to the deep concave portion 62 of the laminated blank glass 53. The press member 52 is attached to the support arm 6 on the press base 63.
It is attached via 4. This press base 63 is moved up and down by a press cylinder 65, and when the press cylinder 65 descends, it press-forms a deep concave portion of the first laminated blank glass 53, and as the press cylinder 65 rises, the press is released. It looks like it will be done. When the auxiliary press member 52 presses the deep concave portion 62 of the laminated blank glass 53, the auxiliary press member 52 and the laminated blank glass 53 are It is more preferable to press in the normal direction at the contact portion.

The above-mentioned auxiliary press member is made of glass fiber, silica fiber, or other ceramic fiber that covers the contact surface of the auxiliary press member with the glass to prevent press marks from forming on the laminated base glass when the laminated base glass is press-formed. , it is preferable to provide a heat insulating cloth 70 such as metal fiber.

In the example shown in FIGS. 6 to 8, two laminated blank glass sheets 80 are placed on a split-type bending die 81, and when bending the laminated blank glass sheet 80 using its own weight, the laminated blank glass sheet This is an example in which a local heating heater 83 is provided above the laminated blank glass 80 at a portion corresponding to the deep recess portion 80 so that the bending process of the deep recess portion 82 of the glass plate 80 is made easier. Using this local heating heater, the deeply recessed part of the laminated blank glass 80 is heated to a higher temperature than other parts, for example, 10°C to +00°C.
By increasing the degree of C, it becomes easier to bend the deeply recessed portion by its own weight. Such local heating heaters may be placed above or below the two stacked laminated glass sheets, or may be placed both above and below the glass sheets. The shape of the local heating heater is appropriately determined depending on the desired shape of the deep recessed part to be bent, and may be linear in the length direction, or it may be shaped like a polygonal line of the deep recessed part. It may be curved such that the shape is curved, or it may be a more complicated shape. 6th
．． The example shown in FIG. 7 is the latter example.

Also, when heating a laminated base glass locally using a local heating heater, if you want to prevent the local heating from reaching other parts,
As shown in FIG. 8, a heat shielding member 84 such as a heat-resistant heat shielding curtain or a heat shield plate is placed in a desired area, and a local heating heater 83 is placed.
It can also cut unwanted radiant heat.

In the method of the present invention, a laminated blank glass is press-formed to be bent and formed as shown in FIG. 11, and a colored ceramic color ink is printed on the peripheral area including the deeply concave portion (including the bending line 94), It is also possible to form colored bands. In this way, if colored ceramic color ink is printed on the press-formed area and baked onto the surface of the laminated glass in the heating process before press-forming, even if the colored ceramic color ink is printed on the surface of the laminated glass in the heating process before press-forming, it will not be colored. Even if press marks or scratches occur on the band or the periphery of the laminated glass, the colored ceramic color ink will not be noticeable due to the colored band.
Optical defects in appearance can be hidden.

In addition, as shown in FIG. 9, two sheets of laminated plain glass 9
0. If the colored ceramic color ink is printed on the upper surface of the deeply bent part of the upper laminated blank glass 90 to form the colored band 92, the colored ceramic color ink is coated on the press surface of the auxiliary press member during pressing. The colored ceramic color ink may adhere to the heat-resistant cloth and shorten the life of the heat-resistant cloth, or the colored ceramic color ink may cause press marks on the surface of the colored band. In order to prevent this, a heat-resistant mold release agent is printed on the printed surface of the colored ceramic color ink to form a mold release agent layer 93, and the colored ceramic color ink is baked during press molding between the colored band and the auxiliary press member. Good releasability from heat-resistant cloth can be achieved. Examples of such heat-resistant mold release agents include boron nitride and carbon.

Alternatively, as an improvement to extend the life of the heat-resistant cloth covered with the auxiliary press member as described above, or to improve the press surface of the colored band by baking the colored ceramic color ink, two sheets as shown in Figure 1O may be used. Laminated laminated glass 90
．． 9] is preformed by bending under its own weight, and prior to press forming, the upper and lower laminated glass plates 90 and 91 are reversed,
The colored ceramic color ink is baked by placing the laminated blank glass 90 on which the colored band 92 is formed on the lower side, press-molding the peripheral part of the laminated blank glass 91 where the colored band is not applied, and applying the colored ceramic color ink. It is also possible to prevent the heat-resistant cloth from adhering to the heat-resistant cloth.

[Effects of the Invention] As explained above, according to the laminated glass bending method and apparatus of the present invention, a glass plate for laminated glass is heated to the glass softening temperature and fixed to a movable split mold by the self-weight bending method. After temporarily forming the mold into a shape that roughly follows the bending mold of the split mold type having a split mold, the movable split mold is fixed to the fixed split mold and imperfectly formed parts of the laminated blank glass are corrected by partial pressing. As a result, even if the side portions of the laminated glass are deeply bent, the movable split mold will not spring up during press forming. This increases the degree of freedom in shaping the laminated base glass.

Further, in one aspect of the present invention, the end portions on both sides of the two stacked laminated glass sheets placed on the bending die are further received by a tapered ring die provided adjacent to the outside of the bending die. In this case, the deeply bent part of two stacked laminated glass sheets is heated more locally than other parts by a local heating heater, bent under its own weight, and then the locally heated part is pressed from above with an auxiliary press member. By doing so, the side edges of the two laminated glass sheets can be bent to have a desired radius of curvature. For example, if press forming is not performed after bending under its own weight, the side edges of two laminated glass sheets should be
The limit was almost to bending with a radius of curvature of ~+0000 mmR, but by press-forming the rear side edge as described above, it is now possible to bend with a radius of curvature of about 80 to 200 mmR. Became. In addition, in order to support the side end portions of the two laminated blank glass sheets using the taper ring mold, as in the conventional case, the two laminated blank glass sheets are made to protrude approximately 4 mm to 10 mm from the end of the bending mold. A bending mark can be created at the contact area of the bottom edge of the blank glass with the molding surface of the ring of the bending die.

Further, according to the present invention, when deep bending a laminated base glass for laminated glass to a desired curvature, there was a problem that conventionally, a complicated process called an oversize processing method had to be performed. According to the present invention, by using laminated blank glass cut into dimensions that match the shape of the desired laminated glass, it is possible to obtain deeply bent laminated glass having a desired peripheral edge curvature. This makes it possible to easily manufacture laminated glass having such a shape and to reduce costs.

Furthermore, in one embodiment of the present invention, if colored ceramic color ink is printed on the deep bent portion of the laminated blank glass to be press-formed by the auxiliary press member, the auxiliary press member may print the surface of the laminated blank glass or the colored ceramic color ink. Even if press marks are left on the surface of the colored band, the burning of the ceramic color ink has the advantage that it is less noticeable (because it becomes visible on the colored band) and does not become an optical defect when viewed through perspective.

[Brief explanation of the drawing]

FIG. 1 is a schematic explanatory diagram showing a bending and forming system for laminated blank glass incorporating an embodiment of the bending and forming apparatus for laminated blank glass for laminated glass according to the present invention;
The figure is an overall or partial schematic explanatory diagram of a bending and forming apparatus for laminated blank glass for laminated glass according to an embodiment of the present invention, and FIGS. 6 to 8 are schematic explanatory diagrams showing a local heating method for laminated blank glass. , FIGS. 9 to 11 show explanatory diagrams for showing one embodiment of the method of the present invention. 1.53, 80, 90. Old: Laminated blank glass 2: Heating/bending section 10.42, 50, 81: Bending mold 12.51: Movable split mold 1: Fixed split mold 30: Auxiliary press means 40: Taper ring 52: Auxiliary press member 70: Heat-resistant cloth 92: Colored band of @ color ceramic color ink (b) Fig. 2 (a) Fig. 4 (a) Fig. 10 (b)

Claims (5)

[Claims] (1) When two pieces of laminated raw glass for laminated glass are overlapped and simultaneously bent and formed so that the sides of both laminated raw glasses are deeply bent, the two pieces of laminated raw glass are moved into a movable splitter with a desired forming surface. Place it on a bending mold equipped with a mold and a fixed split mold,
The two sheets of laminated raw glass placed on this bending mold are heated to the bending temperature of the glass in the heating and bending processing stage in the heating furnace, and the two sheets of laminated raw glass are roughly aligned with the bending mold. The movable split mold is then fixed to the fixed split mold, and the deeply bent part of the laminated blank glass is placed on the bending mold from above the two stacked laminated blank glasses. 1. A method for bending and forming laminated blank glass for laminated glass, characterized in that two sheets of laminated blank glass are press-formed at the same time by pressing with an auxiliary press member in a placed state. (2) It is equipped with a movable split mold and a fixed split mold each having a desired molding surface, and has a molding surface corresponding to the desired molding shape of the side of the laminated blank glass at the side end edge of the deep bend corresponding part. Two pieces of laminated blank glass are placed on a bending die with a tapered ring on the top surface, and the two pieces of laminated blank glass placed on this bending die are heated and bent at a heating and bending processing stage in a heating furnace. The glass is heated to the bending temperature of the glass, and the two laminated blank glasses are temporarily formed into a shape that roughly follows the bending mold by self-weight bending.Then, the movable split mold is fixed to the fixed split mold, and the The method is characterized in that the deeply bent portion of the laminated blank glass is pressed from above by an auxiliary press member while it is placed on a bending mold, thereby simultaneously press-forming the two laminated blank glass sheets. A method of bending and forming laminated base glass for laminated glass. (3) When stacking two pieces of laminated blank glass for laminated glass and bending them simultaneously so that the sides of both laminated blank glasses are deeply bent, one of the two pieces of laminated blank glass is Using a laminated blank glass with colored ceramic color frit printed on the deep bending part, this laminated blank glass is stacked on another laminated blank glass to form a movable split mold and a fixed split mold having the desired molding surface. The two sheets of laminated blank glass placed on this bending mold are heated to the bending temperature of the glass in the heating and bending processing stage in a heating furnace, Temporarily forming the laminated blank glass into a shape that roughly follows the bending die by bending under its own weight, and baking a printed layer of colored ceramic color frit onto the glass plate surface, then fixing the movable split mold to the fixed split mold, The baked printed layer part of the colored ceramic color frit on the deep bent part of the upper laminated raw glass of the two stacked laminated raw glasses is placed on the bending mold from above. A method for bending and forming laminated blank glass for laminated glass, characterized in that two sheets of laminated blank glass are press-formed at the same time by pressing with an auxiliary press member. (4) When stacking two pieces of laminated blank glass for laminated glass and bending them at the same time so that the sides of both laminated blank glasses are deeply bent, one of the two pieces of laminated blank glass should be Using a laminated blank glass with colored ceramic color frit printed on the deep bending part, this laminated blank glass is stacked on another laminated blank glass to form a movable split mold and a fixed split mold with the desired molding surface. The two sheets of laminated raw glass placed on this bending mold are heated to the bending temperature of the glass plate in the heating and bending processing stage in the heating furnace, and the two sheets are The laminated blank glass is temporarily formed into a shape that roughly follows the bending mold by bending under its own weight, and a printed layer of colored ceramic color frit is baked onto the glass plate surface.Then, the top and bottom of the two laminated blank glass sheets are switched, The laminated blank glass that was on the top side becomes the bottom side, and the printed layer of colored ceramic color frit of this glass is placed on the surface where it overlaps with the other laminated blank glass, and the movable split mold is moved to the bottom side. The laminated blank glass is fixed to a fixed split mold, and then the deep bent part of the upper laminated blank glass is pressed from above with an auxiliary press member while it is placed on the bending mold to form two laminated blank glasses. A method for bending and forming laminated blank glass for laminated glass, characterized by press-forming plate glass at the same time. (5) A bending and forming device for laminated blank glass for laminated glass, which overlaps two laminated blank glasses for laminated glass and simultaneously bends and forms the sides of both laminated blank glasses so that the sides of the laminated blank glasses are deeply bent. A split-type bending mold comprising a fixed split mold having a bending surface corresponding to an intermediate curved part to be formed of a blank glass and a movable split mold having a bending surface corresponding to a deep bending part to be formed, and the bending mold. an auxiliary press member provided above the mold and corresponding to the lateral deep bending portion of the laminated blank glass to be formed, and an elevating mechanism for the auxiliary press member;
1. A bending and forming apparatus for laminated blank glass for laminated glass, comprising a fixing means for fixing the movable split die to the fixed split die when pressing the laminated blank glass.