Hollow glass pane and method for forming a closed frame-shaped spacer on a glass pane
By employing a two-layer stacking method in the manufacturing of insulating glass panels, the problems of deformation and sinking of the spacer strips at the glass panel edges are solved, enabling the manufacture of stable spacer strips with a thickness greater than 20 mm. This method is suitable for conventional production lines and improves the quality and efficiency of insulating glass panels.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GLASTON GERMANY GMBH
- Filing Date
- 2025-12-11
- Publication Date
- 2026-06-12
AI Technical Summary
In the manufacturing of insulated glass panels, the spacer strips are prone to deformation and sinking at the edges and bottom edges of the glass panel, especially when the target thickness is greater than 18 mm. Furthermore, special equipment and production lines are required, which cannot be achieved on commonly used pressing stations and production lines.
The method employs at least two layers of spacer strips. The first layer forms the starting section and transition zone on the glass plate, and the second layer forms the ending section on the first layer. The thickness is gradually changed by moving the nozzle along the edge of the glass plate to form a stable frame-shaped spacer strip, avoiding deformation and sinking.
It achieves stability and appearance quality for spacers with greater thickness (e.g., 20 mm or more), avoids undesirable deformation and sagging, is suitable for conventional production lines, and improves the manufacturing efficiency and quality of insulating glass sheets.
Smart Images
Figure CN122190604A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a method for forming a closed frame-shaped spacer on a glass plate and to a hollow glass plate. Background Technology
[0002] DE 44 33 749 A1 discloses a method for forming a closed frame-shaped spacer for insulated glass panes on a glass plate. The method forms the spacer by applying a spacer strip composed of a paste-like, subsequently cured plastic material to the glass plate. Such methods are widely used in practice. Due to increasingly stringent requirements for the thermal insulation performance of insulated glass, it is necessary to increase the distance between adjacent panes in an insulated glass pane. When a spacer strip composed of a paste-like, subsequently cured plastic material is applied to a predetermined target thickness, the following may occur: the spacer strip, while still flexible, may deform and sag due to its own weight in the upper and / or lower edge regions of the glass panes, especially when the target thickness is greater than 18 mm.
[0003] DE 10 2019 123 700 A1 discloses a hollow glass panel and a method for manufacturing the same, wherein spacer strips are applied to a first glass panel and a second spacer strip is applied to a second glass panel. When the frame-shaped spacer strips are applied, the closed area where the start and end points of the spacer strips meet is always located in the same position, for example, in the lower left corner region of the glass panel. After application, one of the two glass panels is rotated about an axis parallel to the plane of the glass panel, and then assembled with the other glass panel with the two spacer strips overlapping each other. After rotating one glass panel, the closed area on that glass panel is located in the lower right corner region. After assembly, the closed areas on the spacer strips are visible at the two corners of the hollow glass panel. This process requires specially designed manufacturing equipment or production lines, especially a flipping station for rotating vertical glass panels. In addition, a pressing station with two horizontally parallel conveyor lines is required, whose pressing plates are V-shaped and inclined in opposite directions to support the two opposing glass panels (see EP 2 802 727 B1). Therefore, this method cannot utilize the pressing stations and production lines that have been commonly used to date, and thus has not been put into practice.
[0004] WO 2019 / 076804 A1 discloses a method and insulating glass panel of the type described at the beginning. The spacer strip comprises at least two layers stacked on top of each other, composed of different transparent materials with different properties. At least one layer is used to enhance the stiffness of the spacer strip, and the other layer is used for sealing. The starting and ending segments of the spacer strip within the same layer are joined at an obtuse angle. Summary of the Invention
[0005] The purpose of this invention is to provide an improved method for manufacturing insulated glass panels and an improved insulated glass panel.
[0006] This objective is achieved through the manufacturing method and hollow glass plate provided by the present invention.
[0007] The method according to the invention for forming a closed frame-shaped spacer for an insulated glass pane on a glass plate is part of the insulated glass pane manufacturing process according to the invention. The insulated glass pane according to the invention comprises at least two glass plates and a frame-shaped spacer disposed between the two glass plates, and the two glass plates are held at a predetermined distance due to the thickness of the spacer. The space between the two glass plates may be filled with different media. In an insulated glass pane used as window glass, the space between the two glass plates may be filled with a gas different from air, such as argon. In an insulated glass pane used as fire-resistant glass, the space between the two glass plates may be filled with a gel, such as a brine hydrogel. The spacer is formed by applying a spacer strip to the glass plate. The spacer strip is formed in a known manner from a subsequently cured paste-like plastic material. The plastic material may be a thermoplastic material that can be cured by cooling alone. The plastic material may also be a reactive crosslinked material that cures through a chemical reaction. The material of the spacer strip can be applied to the glass plate at a predetermined target thickness using a nozzle. The nozzle can move along the edge of the glass plate, depositing the spacer strip exiting the nozzle onto the glass plate such that the start and end points of the strip meet.
[0008] According to the invention, spacer strips are applied to a glass plate in two or more layers (particularly two to five layers) stacked on top of each other to form spacer strips. The spacer strips are first applied to the glass plate as a first layer. Then, a second layer of spacer strips is applied onto the spacer strip already in the first layer. If the spacer strip is formed by only two layers, then the second layer is the last layer. The thickness of the spacer strip is formed by the application of multiple layers (particularly two layers) of spacer strips stacked on top of each other. The spacer strip has at least one starting segment in the first layer and an ending segment in the last layer. The ending segment in the last layer at least partially overlaps with the starting segment in the first layer. Thus, the spacer strip of the finished insulating glass plate has a region in which a portion of the starting segment of the first layer and a portion of the ending segment of the last layer are both located. Therefore, at at least one location, the thickness of the double-layer spacer strip is formed partly by the starting segment in the first layer and partly by the ending segment in the second layer.
[0009] According to the invention, spacer strips are applied continuously from a first layer to a second layer, and particularly from the first layer to a last layer. The spacer strip has at least one transition zone disposed between a starting segment of the first layer and a terminating segment of the last layer. Specifically, the spacer strip may have a transition zone disposed between the starting segment of the first layer and the terminating segment of the second layer. Within the transition zone, the spacer strip extends uninterruptedly from one layer to another, particularly from the first layer to the second layer. Within the transition zone, the thickness of the spacer strip can change from a target thickness of one layer to a target thickness of another layer, particularly from a target thickness of the first layer to a target thickness of the second layer. Therefore, in the closed region of the frame-shaped spacer strip consisting of two layers, the total thickness is formed by the starting segment in the first layer, the transition zone above it, and the terminating segment of the second layer above the transition zone.
[0010] This invention has significant advantages: The total thickness of the spacer between the two glass plates is formed by the sum of the thicknesses of all layers of the spacer strips that are stacked on top of each other.
[0011] By applying spacer strips in at least two layers, the first layer can be cured over a longer period of time, resulting in greater stability and load-bearing capacity of the first layer when the second layer is applied on top of it.
[0012] Even with a large spacer thickness, undesirable deformation and / or sagging in the horizontal area of the frame-shaped spacer can be avoided. This makes it possible to reliably manufacture spacers with a thickness of 20 mm or more (especially in the range of 25 mm to 60 mm).
[0013] In finished insulated glass panels, at most one closed area can be seen on the frame-shaped spacer, which can improve the appearance.
[0014] In another embodiment, the nozzle may move at least twice along the edge of the glass plate, applying the spacer strip exiting the nozzle as at least two directly stacked layers onto the glass plate. The thickness of the spacer strip exiting the nozzle may increase from zero to the target thickness of the first layer along a predetermined length at the beginning, and decrease to zero at the end of the spacer strip from the target thickness of the last layer. The thickness of the spacer strip in the second or upper layer may be greater than the thickness of the spacer strip in the first layer, particularly by 1.2 to 1.6 times. Thus, the cross-section of the spacer strip in the first layer is relatively small, allowing the first layer to cool relatively quickly on the cold glass plate. Therefore, the first layer can form a stable substrate after a relatively short time for the application of the second layer. This can prevent undesirable deformation and / or sagging of the spacer strip in a particularly effective manner. The terminating segment in the last layer may be offset relative to the starting segment in the first layer. The length of the terminating segment in the last layer may be greater than the starting segment in the first layer.
[0015] Both the starting segment in the first layer and the ending segment in the last layer can be wedge-shaped. The starting segment in the first layer may have a first inclined plane. The ending segment in the last layer may have a second inclined plane. The first and second inclined planes may be inclined in the same direction relative to the glass surface of the finished insulating glass sheet. The angle from the glass surface to the first and / or second inclined plane may be less than 45°, particularly less than 25°. The first and second inclined planes may form an angle of at most 10° with each other, particularly at most 5°. The second inclined plane may be longer than the first inclined plane. The wedge-shaped starting segment can be formed by increasing the thickness of the spacer strip from zero to a target thickness over a predetermined length when the spacer strip is discharged from the nozzle. The wedge shape of the ending segment may be complementary to the wedge shape of the starting segment. For this purpose, in the ending segment, when the spacer strip is discharged from the nozzle, the thickness of the spacer strip may be reduced from the target thickness to zero over a predetermined length. In particular, the predetermined length may be 3 cm to 10 cm. The nozzle may have an outlet with a generally rectangular outlet cross-section and a slider for closing the outlet.
[0016] In another embodiment, the spacer strip is applied to the glass plate such that its start and end points meet within the same layer. The spacer strip may have a start segment in a first layer, an end segment in a second layer, and a start segment in a second layer. The spacer strip may include an end segment in the second layer. The start segment of the second layer is applied over the end segment of the first layer. Thus, the start segment of the second layer and the end segment of the first layer at least partially overlap. At the beginning of the first layer, as the spacer strip exits the nozzle, the thickness of the spacer strip can be increased from zero to a target thickness of the first layer over a predetermined distance, and at the end of the first layer, the thickness of the spacer strip can be complementaryly reduced from the target thickness to zero over the same distance. The end segment of the first layer at least partially overlaps with the start segment of the first layer. Attached Figure Description
[0017] Further details and advantages of the invention will be explained with reference to the accompanying drawings in the embodiments thereof. Identical and corresponding parts are provided with corresponding reference numerals.
[0018] Figure 1 A schematic side view of a hollow glass panel according to the invention is shown, wherein the spacer strip is applied in two layers; Figure 2 Show Figure 1 A 3D view of the manufacturing process of insulated glass panels; Figure 3 A partial enlarged detail of a schematic side view of a hollow glass plate according to the present invention is shown; Figure 4 A perspective view of the closed area in the corner region, shown by two layers of spacers; and Figure 5 Showing with Figure 4 Similar diagrams but with different closed-area designs.
[0019] List of reference numerals 1. Insulating glass panel 2. Spacer bar 3. Glass plate 4. Spacer strips 5 nozzles 6. Initial Segment 7 First inclined plane 8. Transition Zone 9 Termination Section 10 second slope 11. Glass plate surface 12 Closed regions 13 Glass Plate 14 Termination Section 15. Initial Segment L1 First Floor L2 Second Layer D1 L1 thickness D2 L2 thickness D3 Total Thickness S is the length of the initial segment. W1 angle W2 angle. Detailed Implementation
[0020] The insulating glass panel 1 includes frame-shaped spacers 2 on the glass panel 3. Using a nozzle 5 (shown schematically only), the spacers 4 are applied to the glass panel 3 in two directly stacked layers L1 and L2 to form the spacers 2. The first layer L1 is applied directly to the glass panel 3. The second layer L2 forms the final layer of the spacers 2. In the initial section 6, the thickness of the spacers 4 increases along the first inclined plane 7 over a predetermined length S to the target thickness D1 of the first layer L1. The nozzle 5 moves around the glass panel 3. When the nozzle 5 reaches the initial section 6 again, the spacers 4 are continuously applied to the inclined plane 7 within the transition zone 8 (see [link to original text]). Figure 3 and Figure 4Then, the second layer L2 is applied continuously. In the region of transition zone 8, the thickness of the spacer strip 4 discharged from nozzle 5 increases to the target thickness D2 of the second layer. Then, nozzle 5 moves circumferentially around glass plate 3 for the second time, thereby applying the second layer L2 onto the spacer strip 4 already located in the first layer L1. In the terminating section 9, the target thickness of the spacer strip 4 is reduced from D2 to zero along the second inclined plane 10. In the region of terminating section 9, the reduction of the target thickness occurs over a length longer than the length S of the starting section 6. Terminating section 9 is arranged slightly offset from the starting section 6, such that there is an equal offset V at the start and end points. Inclines 7 and 10 form an angle W1 of approximately 25° with the glass plate surface 11 and are inclined in the same direction. The angle W2 between the first inclined plane 7 and the second inclined plane 10 can be in the range of 0° to 5°. The total thickness D3 = D1 + D2 can be in the range of 20 mm to 50 mm, particularly in the range of 27 mm to 32 mm. If layers L1 and L2 have equal thickness, the two inclined planes 7 and 10 extend parallel to each other, and the spacer strip 4 is also applied with a constant target thickness within the transition zone 8. The transition zone 8 is thus arranged between the inclined plane 7 of the starting segment 6 and the inclined plane 10 of the ending segment 9, and extends continuously from the first layer L1 into the second layer L2. The closed region 12 of the spacer strip 2 includes the starting segment 6, the transition zone 8, and the ending segment 9, and... Figure 3 In the illustrated embodiment, it is located in the straight area of spacer 2. Figure 4 In the illustrated embodiment, the closed area 12 is located in the corner region of the glass plate 3. After the spacer strip 4 has been fully applied to the glass plate 3, the glass plate 3 is joined to another glass plate 13 in a known manner (see [link to original document]). Figure 2 To form a hollow glass panel 1, such that the spacer 2 holds the two glass panels 3, 13 at a predetermined distance (see...). Figure 1 ).
[0021] exist Figure 5 In the illustrated embodiment, the first layer L1 of the spacer strip 4 ends with the termination segment 14. The application of the spacer strip 4 is interrupted. Then, the second layer L2 begins with the start segment 15, which is applied to the termination segment 9 of the first layer, such that the start segment 15 overlaps with the termination segment 9. Here, the first inclined plane 7 is parallel to the second inclined plane 10. This can be done according to... Figure 4 The third layer (not shown) is applied in the manner shown, such that the transition region 8 extends from the second layer L2 into the third layer (not shown).
Claims
1. A method for forming a closed frame-shaped spacer (2) for a hollow glass plate (1) on a glass plate (3), comprising the following steps: Spacer strips (4) consisting of a paste-like and subsequently cured plastic material are applied to the glass plate (3). The spacer strips (4) are applied to the glass plate (3) in at least two overlapping layers (L1, L2) to form the spacer strips (2). In this process, the spacer strip (4) is applied as a first layer (L1) onto the glass plate (3), and In this process, the spacer strip (4) is applied as a second layer (L2) onto the spacer strip (4) of the first layer (L1). Its features are: The spacer strip (4) is a continuous transition from one of at least two overlapping layers (L1, L2) (L1) to another overlapping layer (L2).
2. The method according to claim 1, wherein, The nozzle (5) moves at least twice around the edge of the glass plate (3), thereby applying the spaced strips (4) discharged from the nozzle (5) onto the glass plate (3) in at least two overlapping layers (L1, L2). The thickness of the spacer strip (4) discharged from the nozzle (5) increases from zero at the starting point to the target thickness (D1) of the first layer (L1) in a section with a predetermined length (S), and decreases to 0 at the end of the spacer strip (4) from the target thickness (D2) of the last layer (L2).
3. The method according to claim 1 or 2, wherein, The spacer strip (4) is applied to have a start segment (6) and an end segment (14) in the first layer (L1) and a start segment (15) in the second layer (L2), wherein the start segment (15) in the second layer (L2) is applied at least partially to the end segment (14) in the first layer (L1).
4. A hollow glass panel (1) comprising at least two glass panels (3, 13) and a spacer (2) disposed between the two glass panels, the two glass panels (3, 13) maintaining a predetermined distance due to the thickness (D3) of the spacer. in, The thickness (D3) of the spacer (2) is formed by at least two layers (L1, L2) of spacer strips (4) stacked on top of each other, the spacer strips (4) including a starting segment (6) in the first layer (L1) and a terminating segment (9) in the last layer (L2). Its features are: The starting segment (6) in the first layer (L1) and the ending segment (9) in the last layer (L2) at least partially overlap. Between the starting segment (6) in one of the at least two layers (L1, L2) and the ending segment (9) in the other of the at least two layers (L1, L2), at least one transition zone (8) of spacer strips (4) is arranged, wherein the spacer strips (4) in the transition zone (8) extend uninterruptedly from one layer (L1) to the other layer (L2).
5. The hollow glass panel according to claim 4, wherein, Between the starting segment (6) in the first layer (L1) and the ending segment (9) in the second layer (L2), a transition area (8) of spacer strips (4) is arranged, wherein the spacer strips (4) in the transition area (8) extend uninterruptedly from the first layer (L1) into the second layer (L2).
6. The hollow glass panel according to claim 4 or 5, wherein, The starting segment (6) in the first layer (L1) has a first inclined surface (7). The terminating segment (9) in the last layer (L2) has a second inclined surface (10), and The first inclined plane (7) and the second inclined plane (10) are inclined in the same direction.
7. The insulating glass panel according to claim 4 or 5, wherein, The spacer strip (4) has a terminating segment (14) in the first layer (L1) and a starting segment (15) in the second layer (L2). Wherein, the terminating segment (14) in the first layer (L1) and the starting segment (6) in the first layer (L1) at least partially overlap, and The starting segment (15) in the second layer (L2) and the ending segment (14) in the first layer (L1) overlap at least partially.