Method and device for cutting laminated glass

Abstract

To provide a technique capable of cutting laminated glass by using air bubbles instead of an abrasive and capable of suppressing contamination when cutting the laminated glass.SOLUTION: A method for cutting laminated glass comprises cutting laminated glass including a first glass plate, an interlayer and a second glass plate in this order by a water jet. The water jet is a jet generated by jetting pressurized water from a nozzle; and the jet includes the pressurized water and air bubbles.SELECTED DRAWING: Figure 7

Description

[Technical field]

[0001] The present disclosure relates to a method for cutting laminated glass and an apparatus for cutting laminated glass. [Background technology]

[0002] Patent Document 1 describes a method for processing laminated glass. The laminated glass has two glass sheets and an interlayer film that bonds the two glass sheets. In Patent Document 1, the laminated glass is cut using an abrasive jet processing device. Abrasive jet processing is a technique for processing an object by adding an abrasive to pressurized water. Patent Document 1 describes that, for example, garnet abrasive grains are suitable as the abrasive.

[0003] Patent Document 2 describes a separation device that separates the glass sheets and the interlayer film that constitute laminated glass. The separation device includes a liquid tank that contains a treatment liquid, a barrel container that is rotated inside the liquid tank, and a temperature adjustment device that adjusts the temperature of the treatment liquid. The laminated glass is prepared by crushing the glass sheets in advance, and then putting them into the barrel container and immersing them in the treatment liquid. By rotating the barrel container, shear stress can be applied to the glass sheets and the interlayer film. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2011-178614 A [Patent Document 2] International Publication No. 2007 / 111385 Summary of the Invention [Problem to be solved by the invention]

[0005] Conventionally, cutting laminated glass by abrasive jet processing has been considered. In abrasive jet processing, an abrasive material is used. The abrasive material contaminates the cut pieces. In order to reuse the contaminated cut pieces, a new cleaning process must be added to the laminated glass recycling method, which increases the manufacturing cost.

[0006] One aspect of the present disclosure provides a technique that can cut laminated glass and can suppress contamination when cutting the laminated glass. [Means for solving the problem]

[0007] A method for cutting laminated glass according to one embodiment of the present disclosure includes cutting a laminated glass having a first glass sheet, an interlayer film, and a second glass sheet in this order with a water jet. The water jet is a jet generated by spraying pressurized water from a nozzle, and the jet contains the pressurized water and air bubbles.

[0008] A laminated glass cutting device according to one embodiment of the present disclosure is a laminated glass cutting device that cuts laminated glass having a first glass sheet, an interlayer film, and a second glass sheet in that order with a water jet, the device including a nozzle that sprays the water jet and a supply unit that supplies pressurized water to the nozzle, the water jet being a jet generated by spraying the pressurized water from the nozzle, and the jet containing the pressurized water and air bubbles. Effect of the Invention

[0009] According to one aspect of the present disclosure, by using air bubbles instead of an abrasive, it is possible to cut laminated glass and to suppress contamination when cutting the laminated glass. [Brief description of the drawings]

[0010] [Figure 1] FIG. 1 is a flow chart showing a method for recycling laminated glass according to one embodiment. [Diagram 2] FIG. 2 is a diagram showing an example of laminated glass as viewed from the inside of a vehicle. [Diagram 3] FIG. 3 is a diagram showing an example of a planned cutting line of a laminated glass as viewed from the inside of a vehicle. [Figure 4] FIG. 4 is a cross-sectional view showing an example of laminated glass. [Diagram 5] FIG. 5 is a cross-sectional view showing an example of step S102 in FIG. [Figure 6] FIG. 6 is a cross-sectional view showing an example of step S103 in FIG. [Figure 7] FIG. 7 is a diagram illustrating an example of a cutting device. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0011] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. In each drawing, the same or corresponding components are denoted by the same reference numerals, and the description may be omitted. In the specification, the symbol "~" indicating a range of values ​​means that the values ​​before and after the symbol are included as the lower and upper limits.

[0012] [Laminated glass] First, an example of laminated glass 10, which is a vehicle window glass, will be described with reference to Fig. 2 to Fig. 4. As shown in Fig. 4, the laminated glass 10 has, for example, a first glass plate 11, an interlayer film 12, and a second glass plate 13, in this order from the vehicle exterior side to the vehicle interior side. The interlayer film 12 bonds the first glass plate 11 and the second glass plate 13 together. The number of glass plates constituting the laminated glass 10 may be three or more. In that case, the number of interlayer films constituting the laminated glass 10 is two or more.

[0013] The first glass plate 11 is made of inorganic glass. Examples of inorganic glass include soda lime glass and aluminosilicate glass. Similarly, the second glass plate 13 is made of inorganic glass. The inorganic glass may be either unstrengthened glass or tempered glass. Unstrengthened glass is made by forming molten glass into a plate shape and slowly cooling it. Tempered glass is made by forming a compressive stress layer on the surface of unstrengthened glass. The tempered glass may be either physically strengthened glass (for example, air-cooled tempered glass) or chemically strengthened glass.

[0014] Although not shown, the first glass sheet 11 is formed to be convex toward the outside of the vehicle. Similarly, the second glass sheet 13 is formed to be convex toward the outside of the vehicle. Gravity forming, press forming, or the like is used for bending the glass sheet. In bending, the uniformly heated glass sheet may be rapidly cooled from a temperature near its softening point, and compressive stress may be generated on the glass surface due to the temperature difference between the glass surface and the inside of the glass, thereby physically strengthening the glass surface. After bending, the glass surface may be chemically strengthened by generating compressive stress on the glass surface by an ion exchange method or the like.

[0015] The intermediate film 12 is formed of a typical resin, for example, a thermoplastic resin such as polyvinyl butyral resin (PVB) or ethylene-vinyl acetate copolymer resin (EVA). The intermediate film 12 exhibits adhesiveness when heated. The intermediate film 12 may have either a single layer structure or a multiple layer structure.

[0016] When viewed from the inside of the vehicle, the laminated glass 10 may have a transmission region A1 that transmits visible light and a light-shielding region A2 that blocks visible light. The light-shielding region A2 is, for example, an area shown by a dot pattern in Figures 2 and 3, and is formed along the outer periphery of the laminated glass 10. The light-shielding region A2 is formed by at least one of the first light-shielding layer 14 and the second light-shielding layer 16.

[0017] As shown in FIG. 4, the first light-shielding layer 14 is provided, for example, on the surface 11a of the first glass sheet 11 facing the vehicle interior. The first light-shielding layer 14 hides the first metal layer 15, which will be described later, from the exterior of the vehicle. The first metal layer 15 is formed on the surface of the first light-shielding layer 14 facing the vehicle interior. The first light-shielding layer 14 is formed by applying a ceramic color paste to the surface 11a of the first glass sheet 11 facing the vehicle interior and firing the paste. The ceramic color paste contains, for example, glass powder and a black pigment. The firing of the ceramic color paste may be performed simultaneously with the heat treatment for bending the first glass sheet 11.

[0018] The second light-shielding layer 16 is provided, for example, on the surface 13a of the second glass sheet 13 facing the vehicle interior. The second light-shielding layer 16 hides the second metal layer 17, which will be described later, from the exterior of the vehicle. The second metal layer 17 is formed on the surface of the second light-shielding layer 16 facing the vehicle interior. The second light-shielding layer 16 is formed by applying a ceramic color paste to the surface 13a of the second glass sheet 13 facing the vehicle interior and firing the paste. The firing of the ceramic color paste may be performed simultaneously with the heat treatment for bending the second glass sheet 13.

[0019] As shown in Figures 2 and 3, the laminated glass 10 may have at least one of a first metal layer 15 and a second metal layer 17 in a part of the light-shielding area A2 when viewed from the inside of the vehicle. The first metal layer 15 and the second metal layer 17 are, for example, a heating wire or an antenna wire. The heating wire heats the laminated glass 10 to remove fog (e.g., water droplets) or ice on the surface of the laminated glass 10. The antenna wire receives or transmits radio waves. The first metal layer 15 and the second metal layer 17 may be part of a liquid crystal panel that displays images.

[0020] The laminated glass 10 may have both the first light-shielding layer 14 and the second light-shielding layer 16, or only one of them. The laminated glass 10 may have both the first metal layer 15 and the second metal layer 17, or only one of them. For example, the laminated glass 10 may have the first light-shielding layer 14, the first metal layer 15, and the second light-shielding layer 16, but may not have the second metal layer 17. In this case, the second light-shielding layer 16 hides the first metal layer 15 from the inside of the vehicle.

[0021] The laminated glass 10 is produced by stacking a first glass plate 11, an interlayer film 12, and a second glass plate 13 in this order to produce a laminate, and then pressurizing and heating the laminate in an autoclave or the like. Before producing the laminate, the first glass plate 11 and the second glass plate 13 are heat-treated and bent. The laminate may be produced by stacking the second glass plate 13, the interlayer film 12, and the first glass plate 11 in this order.

[0022] The thickness of the laminated glass 10 is preferably 2.8 mm to 10 mm, and more preferably 3.0 mm to 8.0 mm. The thickness of the first glass plate 11 is preferably 1.1 mm to 3.6 mm, and more preferably 1.8 mm to 3.0 mm. The thickness of the second glass plate 13 is preferably 0.5 mm to 2.7 mm, and more preferably 0.5 mm to 2.3 mm. The thickness of the interlayer 12 is preferably 0.5 mm to 3.0 mm, and more preferably 0.5 mm to 2.8 mm.

[0023] The laminated glass to be cut in this embodiment is not limited to the vehicle window glass (automobile front windshield) exemplified in Figures 2 to 4. The laminated glass may be an automobile window glass such as a rear glass, a side glass, or a roof glass, or a vehicle window glass used in a train or the like.

[0024] [How to recycle laminated glass] As shown in Fig. 1, the method for recycling laminated glass 10 includes, for example, steps S101 to S103. Step S101 includes cutting the laminated glass 10 with a water jet. Compared to typical cutting tools, the water jet can prevent the cut surface of the interlayer film 12 from becoming rough and can also prevent the generation of dust. In addition, the width (the distance in the left-right direction in Fig. 7) when the water jet collides with the laminated glass is small, for example, 0.5 mm or less, so the water jet can cut the laminated glass with higher precision than typical cutting tools.

[0025] 3, step S101 includes cutting the laminated glass 10 into a first cut piece 21 and a second cut piece 22. The first cut piece 21 includes at least one of the first metal layer 15 and the second metal layer 17. On the other hand, the second cut piece 22 includes neither the first metal layer 15 nor the second metal layer 17. When the second cut piece 22 is reused as at least one of a glass raw material and a resin raw material after removing the first cut piece 21, it is possible to prevent metal from being mixed into these raw materials.

[0026] The first cut piece 21 may include a metal layer, such as the first metal layer 15, provided between the first glass sheet 11 and the second glass sheet 13. Unlike the second metal layer 17, the first metal layer 15 is not exposed on the surface of the laminated glass 10 and therefore cannot be removed by grinding, etching, blasting, or the like. Therefore, in order to remove the first metal layer 15, it is preferable to cut the laminated glass 10 into the first cut piece 21 and the second cut piece 22.

[0027] The second cut piece 22 need not include the first metal layer 15 and the second metal layer 17, and may include at least one of the first light-shielding layer 14 and the second light-shielding layer 16. As long as the first light-shielding layer 14 and the second light-shielding layer 16 do not contain lead (Pb), there is no problem if they are mixed into the glass raw material. Note that, when the first light-shielding layer 14 and the second light-shielding layer 16 contain lead, it is preferable that the second cut piece 22 does not include either the first light-shielding layer 14 or the second light-shielding layer 16.

[0028] Before cutting the laminated glass 10, for example, an operator visually checks the positions of the first metal layer 15 and the second metal layer 17 and writes the positions with a marker on the surface of the laminated glass 10. A cutting device 100 (see FIG. 7 ) captures an image of the marks written on the surface of the laminated glass 10 with a camera (not shown) or the like and processes the image to determine the position of a planned cutting line for the laminated glass 10. The cutting device 100 then cuts the laminated glass 10 along the predetermined planned cutting line.

[0029] The cutting device 100 may cut the laminated glass 10 so that the second cut piece 22 does not include either the first light-shielding layer 14 or the second light-shielding layer 16. In this case, the worker does not need to check the positions of the first metal layer 15 and the second metal layer 17. The cutting device 100 captures an image of the laminated glass 10 with a camera or the like, processes the image, and detects the boundary line between the transparent region A1 and the light-shielding region A2, and determines the position of the planned cutting line based on the detection result.

[0030] 5, step S102 includes crushing the first glass plate 11 and the second glass plate 13 in the second cut piece 22. The second cut piece 22 includes, in this order, a glass piece that is a part of the first glass plate 11, a resin piece that is a part of the interlayer film 12, and a glass piece that is a part of the second glass plate 13.

[0031] In step S102, the glass pieces attached to both sides of the resin piece are crushed. At this time, unlike the glass pieces, the resin pieces are not crushed. This is because the resin pieces are soft and absorb impacts. The second cut pieces 22 after crushing have a configuration in which a large number of glass pieces smaller than the resin pieces are attached to both sides of the resin piece. The multiple solid lines extending in the thickness direction of the glass pieces shown in FIG. 5 represent the state in which the cracks in the glass have progressed.

[0032] The crushing device for crushing the glass pieces in step S102 may be a general one and is not particularly limited. In this embodiment, the crushing device crushes the glass pieces in the second cut pieces 22 to recycle the second cut pieces 22, but may crush the glass pieces in the first cut pieces 21 to recycle the first cut pieces 21.

[0033] 6, step S103 includes separating glass pieces derived from the crushed first glass plate 11 and resin pieces derived from the interlayer film 12, and separating glass pieces derived from the crushed second glass plate 13 and resin pieces derived from the interlayer film 12. The separated resin pieces and glass pieces can be separately collected by utilizing the difference in size. The resin pieces are larger than the glass pieces.

[0034] It is possible to recycle not only glass pieces but also resin pieces. The larger the area of ​​the resin pieces, the higher the recycling efficiency of the resin pieces. The area of ​​the resin pieces is 40,000 mm 2 From the viewpoint of handling, the area of ​​the resin piece is preferably 1,000,000 mm or more (length 200 mm or more, width 200 mm or more). 2 On the other hand, the area of ​​the crushed glass pieces is preferably 2500 mm or less. 2 It is preferable that the size is 50 mm or less (length 50 mm or less, width 50 mm or less). The glass pieces may be further crushed after being separated from the resin pieces.

[0035] Step S103 includes immersing the crushed second cut pieces 22 in a treatment liquid to separate the glass pieces and the resin pieces constituting the second cut pieces 22. If the glass pieces are crushed in advance, the treatment liquid can easily penetrate into the interface between the glass pieces and the resin pieces. The treatment liquid preferably contains water. Water can break the hydrogen bonds between the glass pieces and the resin pieces. The temperature of the treatment liquid is preferably 40°C to 80°C. If the temperature of the treatment liquid is 40°C or higher, the effect of breaking the hydrogen bonds can be easily obtained. If the temperature of the treatment liquid is 80°C or lower, the water in the treatment liquid can be prevented from evaporating.

[0036] The treatment liquid preferably further contains a surfactant. The surfactant suppresses adhesion between a part of the resin piece and another part of the resin piece. This suppresses folding of the resin piece and suppresses entrapment of the glass piece inside the folded resin piece. Therefore, separation of the glass piece and the resin piece can be promoted.

[0037] The surfactant is not particularly limited, but examples thereof include those described in Patent Document 2. The content of the surfactant is appropriately set depending on the type of surfactant, but is preferably 0.03% by mass to 2% by mass. From the viewpoint of environmental load, the pH of the treatment liquid is preferably 6.5 to 8.5.

[0038] The method for recycling laminated glass may include steps other than steps S101 to S103. In this embodiment, after removing the first cut pieces 21, the second cut pieces 22 are reused as at least one of a glass raw material and a resin raw material, but if it is possible to remove the metal layer from the first cut pieces 21, it is also possible to reuse the first cut pieces 21 as at least one of a glass raw material and a resin raw material.

[0039] The method for recycling laminated glass may also include a step of recovering at least a portion of the metal layer from the first cut piece 21. The first metal layer 15 and the second metal layer 17 contain, for example, silver (Ag), tungsten (W), copper (Cu), or an alloy thereof. By recovering at least a portion of the metal layer, these metals can be recycled.

[0040] [Laminated glass cutting device and cutting method] Next, an example of the cutting device 100 will be described with reference to Fig. 7. The cutting device 100 is used, for example, in step S101 above. The cutting device 100 cuts the laminated glass 10 with a water jet 101. The water jet 101 is a jet of water generated by spraying pressurized water from a nozzle 110. The cutting device 100 includes the nozzle 110 and a supply unit 120 that supplies pressurized water to the nozzle 110.

[0041] The supply unit 120 includes, for example, a pump that pressurizes water. The pressure of the water supplied by the supply unit 120 to the nozzle 110 is preferably 300 MPa or more, and more preferably 350 MPa or more. The higher the water pressure, the better, but from the viewpoint of durability of components that form the water flow path, the water pressure is preferably 1000 MPa or less, and more preferably 500 MPa or less. The flow rate of the water supplied by the supply unit 120 to the nozzle 110 is preferably 1.0 L / min to 10.0 L / min, and more preferably 3.0 L / min to 5.0 L / min.

[0042] The nozzle 110 sprays the water jet 101. The spray direction is downward in this embodiment, but is not particularly limited. If the nozzle 110 and the laminated glass 10 are arranged in the opposite direction, the spray direction is upward. The spray direction may be diagonally downward or diagonally upward.

[0043] The laminated glass 10 has a first glass plate 11, an interlayer film 12, and a second glass plate 13, in this order, along the flow direction of the water jet 101. The arrangement of the first glass plate 11 and the second glass plate 13 may be reversed. In other words, the laminated glass 10 may have the second glass plate 13, the interlayer film 12, and the first glass plate 11, in this order, along the flow direction of the water jet 101.

[0044] It is difficult to cut the laminated glass 10 stably using only pressurized water. For example, the first glass sheet 11 or the second glass sheet 13 may not be cut. Or, the interlayer film 12 may not be cut. As described in Patent Document 1, if an abrasive is added to the pressurized water, the laminated glass 10 can be cut stably, but the cut pieces are contaminated by the abrasive. The abrasive is equal to or smaller than the size of the glass pieces after crushing collected in step S103. Therefore, it is difficult to separate and collect the glass pieces and the abrasive. Therefore, if the abrasive contaminates the cut pieces, it becomes difficult to reuse the cut pieces as glass raw material. The cut pieces may be either the first cut pieces 21 or the second cut pieces 22.

[0045] The nozzle 110 of this embodiment jets pressurized water containing air bubbles. The nozzle 110 may be a nozzle for abrasive jet processing. The nozzle 110 mixes gas into the pressurized water instead of an abrasive. The water jet 101 of this embodiment is a jet containing pressurized water and air bubbles. By including air bubbles in the pressurized water, a partial water cutoff state is intermittently generated in the pressurized water, creating a state of roughness and density of water pressure. This allows intermittent impacts to be applied to the laminated glass 10, and the first glass sheet 11 and the second glass sheet 13 can be efficiently broken. At this time, the glass cracks at the cut position of the laminated glass 10, but this is not a problem from the viewpoint of reusing the cut pieces as at least one of the glass raw material and the resin raw material.

[0046] The water jet 101 first shatters the first glass sheet 11 closest to the nozzle 110, and the resulting glass debris is blown away by the impact, ensuring a flow to the interlayer 12. The water jet 101 then cuts through the interlayer 12, and then shatters the second glass sheet 13 farthest from the nozzle 110. In this manner, the laminated glass 10 can be cut.

[0047] The nozzle 110 uses air bubbles instead of abrasives to cut the laminated glass 10 and can suppress contamination when cutting the laminated glass 10. Unlike abrasives, air bubbles do not contaminate the cut pieces. This makes it possible to reuse the cut pieces as glass raw material. Furthermore, since there is no need to perform a new cleaning process to reuse the cut pieces, production costs can be reduced.

[0048] The nozzle 110 sprays pressurized water containing air bubbles, thereby reducing the noise level of the cutting sound of the laminated glass 10 and widening the allowable range of distance D. Distance D is the distance between the nozzle 110 and the laminated glass 10. The allowable range of distance D is the range of distance D in which the laminated glass 10 can be stably cut. If distance D is too far, the diameter of the water jet 101 when it collides with the laminated glass 10 will become too large, resulting in reduced cutting accuracy and incomplete cutting due to a drop in pressure.

[0049] If the tolerance of the distance D is wide, even if the surface of the laminated glass 10 is curved and the distance D changes due to a change in the height of the surface, there is no need to move the nozzle 110 or the laminated glass 10 in the spraying direction of the nozzle 110. The distance D is preferably within the range of 10 mm to 200 mm, and more preferably within the range of 10 mm to 150 mm.

[0050] The cutting device 100 cuts the laminated glass 10 by relatively moving the nozzle 110 and the laminated glass 10 in a direction intersecting the spray direction of the nozzle 110. The cutting speed of the laminated glass 10 is set appropriately depending on the thickness and material of each member constituting the laminated glass 10, but is preferably 15 m / min or less, and more preferably 12 m / min or less. From the viewpoint of cutting efficiency, the cutting speed of the laminated glass 10 is preferably 1 m / min or more, and more preferably 4 m / min or more.

[0051] The nozzle 110 has a mixing chamber 111 for mixing pressurized water and gas, a first flow path 112 for supplying pressurized water to the mixing chamber 111, a second flow path 113 for supplying gas to the mixing chamber 111, and a third flow path 114 for spraying the pressurized water and air bubbles mixed in the mixing chamber 111 toward the laminated glass 10. A large number of air bubbles can be dispersed in the water in the mixing chamber 111.

[0052] It is preferable that the first flow path 112 and the third flow path 114 are provided on the same straight line with the mixing chamber 111 in between. This makes it easy for pressurized water to flow from the first flow path 112 to the third flow path 114 via the mixing chamber 111. On the other hand, the second flow path 113 is provided perpendicular to the first flow path 112 and the third flow path 114 in this embodiment, but may be provided obliquely.

[0053] It is preferable that the second flow path 113 supplies air, which is a gas, to the mixing chamber 111 by utilizing the pressure difference between the second flow path 113 and the mixing chamber 111. Air has higher fluidity than the abrasive. Therefore, the pressure difference between the second flow path 113 and the mixing chamber 111 allows a stable supply of air. In addition, by utilizing the pressure difference between the second flow path 113 and the mixing chamber 111, the structure of the cutting device 100 can be simplified. Note that the second flow path 113 can also supply an inert gas such as nitrogen to the mixing chamber 111 instead of air. EXAMPLES

[0054] The experimental data will be described below. In Examples 1 to 4, the water jet 101 was sprayed from the nozzle 110 shown in FIG. 7 to the laminated glass 10 under the same conditions except for the conditions shown in Table 1. The nozzle 110 used was ABH-5201 manufactured by Sugino Machine Co., Ltd. The size of the laminated glass 10 was 300 mm long, 300 mm wide, and 4.8 mm thick. The first glass plate 11 was a soda lime glass plate (thickness 2.0 mm), the intermediate film 12 was a PVB film (thickness 0.8 mm), and the second glass plate 13 was a soda lime glass plate (thickness 2.0 mm). In Examples 1 to 3, air was supplied from the second flow path 113 to the mixing chamber 111 at a flow rate of 4 L / min (calculated value), whereas in Example 4, air was not supplied from the second flow path 113 to the mixing chamber 111. Examples 1 to 3 are working examples, and Example 4 is a comparative example. Table 1 shows the processing conditions and processing results of Examples 1 to 4.

[0055] [Table 1]

[0056] As shown in Table 1, in Examples 1 to 3, air was supplied from the second flow path 113 to the mixing chamber 111, so the laminated glass 10 could be cut. On the other hand, in Example 4, air was not supplied from the second flow path 113 to the mixing chamber 111, so the laminated glass 10 could not be cut.

[0057] The laminated glass cutting method and laminated glass cutting device according to the present disclosure have been described above, but the present disclosure is not limited to the above-mentioned embodiments. Various changes, modifications, substitutions, additions, deletions, and combinations are possible within the scope of the claims. These naturally fall within the technical scope of the present disclosure. [Explanation of symbols]

[0058] 10. Laminated Glass 11 First glass plate 12 Interlayer 13 Second Glass Pane 14 1st light shielding layer 15 1st metal layer 16 Second light shielding layer 17 Second metal layer 21 1st cut piece 22 Second cut piece 100 cutting equipment 101 Water Jet 110 Nozzle 111 Mixing room 112 First Channel 113 Second Channel 114 Third Stream 120 Supply section A1 transmission area A2 Shade area

Claims

1. A method for cutting laminated glass, the method comprising cutting a laminated glass having a first glass plate, an interlayer film, and a second glass plate in this order with a water jet, the method comprising the steps of: The water jet is a jet generated by ejecting pressurized water from a nozzle. The method for cutting laminated glass, wherein the jet contains the pressurized water and air bubbles.

2. the laminated glass comprises, from the vehicle exterior side to the vehicle interior side, a first glass plate, an interlayer film, and a second glass plate, in this order; when viewed from the vehicle interior side, the laminated glass has a light-transmitting region and a light-shielding region; and a metal layer is provided in a part of the light-shielding region; 2. The method for cutting a laminated glass according to claim 1, wherein the cutting comprises cutting the laminated glass into a first cut piece including the metal layer and a second cut piece not including the metal layer.

3. The method for cutting a laminated glass according to claim 2 , wherein the metal layer is provided between the first glass sheet and the second glass sheet.

4. 4. The method for cutting a laminated glass according to claim 1, wherein the nozzle has: a mixing chamber that mixes the pressurized water and a gas; a first flow path that supplies the pressurized water to the mixing chamber; a second flow path that supplies a gas to the mixing chamber; and a third flow path that sprays the pressurized water and the air bubbles mixed in the mixing chamber toward the laminated glass.

5. The method for cutting a laminated glass according to claim 4 , wherein the second flow passage supplies the air, which is the gas, to the mixing chamber by utilizing a pressure difference between the second flow passage and the mixing chamber.

6. A laminated glass cutting device for cutting a laminated glass having a first glass sheet, an interlayer film, and a second glass sheet in this order by using a water jet, comprising: A nozzle for ejecting the water jet; A supply unit that supplies pressurized water to the nozzle; Equipped with The water jet is a jet generated by ejecting the pressurized water from the nozzle, The jet includes the pressurized water and air bubbles.

7. 7. The laminated glass cutting device according to claim 6, wherein the nozzle has: a mixing chamber that mixes the pressurized water and gas; a first flow path that supplies the pressurized water to the mixing chamber; a second flow path that supplies gas to the mixing chamber; and a third flow path that sprays the pressurized water and the air bubbles mixed in the mixing chamber toward the laminated glass.

8. The laminated glass cutting device according to claim 7 , wherein the second flow path supplies the air, which is the gas, to the mixing chamber by utilizing a pressure difference between the second flow path and the mixing chamber.

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