Bending method for sealed-filler-type spacer bar for insulating glass unit

Abstract

The present disclosure discloses a bending method for a sealed-filler-type spacer bar for an insulating glass unit, which relates to the technical field of insulating glass units. The method includes: placing the spacer bar in a horizontal direction with its front surface facing downwards in a direction of gravity, and evenly distributing desiccants inside the spacer bar in the horizontal direction along interior of the spacer bar; measuring a first bending distance from an end B toward an end A of the spacer bar to determine a first bending point on the front surface of the spacer bar, placing an abutting end of a first bending tool against the first bending point on the front surface of the spacer bar, and placing a first rotating member and a second rotating member of a second bending tool against a back surface of the spacer bar, a rotating shaft connected to the first rotating member and the second rotating member being located on a side of the first bending point that is close to the end B in the horizontal direction, and the second rotating member being closer to the end B of the spacer bar than the first rotating member. The present application can address the negative impact of internal desiccants on the bending of the spacer bar when the spacer bar is bent.

Description

Related application

[0001] The present application claims priority to Chinese Invention Patent Application No. 202210779496.1, entitled "BENDING METHOD FOR SEALED-FILLER-TYPE SPACER BAR FOR INSULATING GLASS UNIT".Technical field

[0002] The present disclosure relates to the technical field of insulating glass units, in particular to a bending method for a sealed-filler-type spacer bar for an insulating glass unit.Background

[0003] The sealed-filler-type spacer bars used for the insulating glass units are internally filled with granular desiccants. The filling quantity of desiccants inside the sealed-filler-type spacer bar is relatively high, potentially occupying 50% to 90% of the internal space of the spacer bar, to ensure dryness within the insulating glass unit. However, the desiccants inside the spacer bar will hinder the bending of the spacer bar, leading to cracking, tearing, irregularities, or excessive wrinkling at the bent parts of the spacer bar. The above situation will seriously affect the use performance of the spacer bar installed in the insulating glass unit, greatly reduce the aesthetic appeal of the spacer bar, and affect the user experience.Summary

[0004] In order to overcome the above-mentioned defects of the prior art, the embodiments of this present disclosure aim to solve the technical problem by providing a bending method for a sealed-filler-type spacer bar for an insulating glass unit, which can address the negative impact of internal desiccants on the bending of spacer bar when the spacer bar is bent.

[0005] In order to achieve the above object, the technical solution adopted by the present disclosure is as follows: The present disclosure discloses a bending method for a sealed-filler-type spacer bar for an insulating glass unit, including: placing the spacer bar in a horizontal direction with its front surface facing downwards in a direction of gravity, and evenly distributing desiccants inside the spacer bar in the horizontal direction along interior of the spacer bar; measuring a first bending distance from an end B toward an end A of the spacer bar to determine a first bending point on the front surface of the spacer bar, placing an abutting end of a first bending tool against the first bending point on the front surface of the spacer bar, and placing a first rotating member and a second rotating member of a second bending tool against a back surface of the spacer bar, a rotating shaft connected to the first rotating member and the second rotating member of the second bending tool being located on a side of the first bending point that is close to the end B in the horizontal direction, and the second rotating member being positioned closer to the end B of the spacer bar than the first rotating member; moving the abutting end of the first bending tool towards a first direction by a first preset distance to cause the front surface of the spacer bar at the first bending point to be recessed inwardly, and at the same time, rotating the second rotating member towards a bending direction by a first preset angle to cause the end B of the spacer bar to sag, which allows the desiccants on the side of the first bending point of the spacer bar that is close to the end B to fall towards the end B of the spacer bar, leaving no desiccant inside the spacer bar at the first bending point; moving the abutting end of the first bending tool further towards the first direction by a second preset distance to cause the front surface of the spacer bar at the first bending point to be further recessed inwardly, and at the same time, rotating the second rotating member further towards the bending direction by a second preset angle to bend the spacing bar to a target angle.

[0006] Compared with the prior art, the present disclosure has the following beneficial effects: According to the bending method for a sealed-filler-type spacer bar for an insulating glass unit in the present application, firstly, the desiccants inside the spacer bar are processed to be evenly distributed along the horizontal direction with the front surface of the spacer bar facing downwards in the direction of gravity, afterwards, the spacer bar is preliminarily bent at the position of the first bending point, so that the front surface at the first bending point is inwardly recessed, and the end B of the spacer bar sags at the first preset angle, allowing the desiccants on a side of the first bending point of the spacer bar that is close to the end B to fall towards the end B of the spacer bar, in this way, the desiccants at the first bending point are removed. Afterwards, at the first bending point, the abutting end of the first bending tool is further moved towards the first direction by a second preset distance, so that the front surface of the spacer bar at the first bending point continues to be inwardly recessed, and the spacer bar is fully bent to the target angle, during this process, due to the absence of desiccants inside the spacer bar between the front and back surfaces at the first bending point, there will be no desiccants hindering bending of the spacer bar at a large angle in the later stage, thus avoiding cracking, tearing, irregularities, or excessive wrinkling at the bent parts of the spacer bar. Therefore, the bending method of the present disclosure results in a more aesthetically pleasing bend in the spacer bar, with a significant reduction in the likelihood of defects such as cracking, tearing, irregularities, or excessive wrinkling.Brief description of the drawings

[0007] FIG. 1 is a flow chart of steps of a bending method for a sealed-filler-type spacer bar for an insulating glass unit according to an embodiment of the present disclosure; FIG. 2 is a structural schematic diagram of a sealed-filler-type spacer bar for an insulating glass unit according to an embodiment of the present disclosure; FIG. 3 is a cross-sectional view taken along line E-E in FIG. 2; FIG. 4 is a schematic diagram showing that a sealed-filler-type spacer bar for an insulating glass unit is placed completely in a vertical direction according to an embodiment of the present disclosure; FIG. 5 is a schematic diagram showing that a sealed-filler-type spacer bar for an insulating glass unit is rotated to a position where an angle between the spacer bar and the horizontal direction is equal to an angle of repose of the desiccants according to an embodiment of the present disclosure; FIG. 6 is a schematic diagram showing that a sealed-filler-type spacer bar for an insulating glass unit is matched with a first bending tool and a second bending tool before bending according to an embodiment of the present disclosure; FIG. 7 is a schematic diagram showing that a sealed-filler-type spacer bar for an insulating glass unit is bent by a first preset angle according to an embodiment of the present disclosure; and FIG. 8 is a schematic diagram showing that a sealed-filler-type spacer bar for an insulating glass unit is further bent by a second preset angle according to an embodiment of the present disclosure.

[0008] In the drawings, the reference signs refer to: 1. spacer bar; 11. front surface; 12. back surface; 13. sidewall; 14. desiccant; 2. first bending tool; 21. abutting end; 3. second bending tool; 31. first rotating member; 32. second rotating member.Detailed description

[0009] In order to further elaborate the technical features and effects of the present disclosure for achieving the intended purpose of the present disclosure, specific embodiments, structure, features and effects of the present disclosure will now be described in detail with reference to the drawings.

[0010] To address the negative impact caused by the internal desiccants 14 on the spacer bar 1 during bending, the present application provides a bending method for a sealed-filler-type spacer bar for an insulating glass unit according to an embodiment of the present disclosure. FIG. 1 is a flow chart of steps of a bending method for a sealed-filler-type spacer bar for an insulating glass unit according to an embodiment of the present disclosure. As shown in FIG. 1, the bending method for a sealed-filler-type spacer bar for an insulating glass unit may include: Step S101: placing the spacer bar 1 in a horizontal direction with its front surface 11 facing downwards in a direction of gravity, and evenly distributing the desiccants 14 inside the spacer bar 1 in the horizontal direction along interior of the spacer bar 1.

[0011] In the above step, the sealed-filler-type spacer bar 1 for an insulating glass unit may have the following specific structure. FIG. 2 is a structural schematic diagram of a sealed-filler-type spacer bar for an insulating glass unit according to an embodiment of the present disclosure. FIG. 3 is a cross-sectional view taken along line E-E in FIG. 2. As shown in FIGs. 2 and 3, the spacer bar 1 has two opposite ends, namely an end A and an end B, both of which are in a sealed state, and the interior of the spacer bar 1 is filled with desiccants 14. The spacer bar 1 has a front surface 11 and a back surface 12 that are opposite to each other, and two sidewalls 13. The front surface 11 refers to a surface of the spacer bar 1 that faces the cavity of the insulating glass unit after the spacer bar 1 is bent into a frame. The sidewall 13 refers to a surface of the spacer bar 1 that abuts against the glass unit when the spacer bar 1 is assembled with the glass unit. The back surface 12 refers to a surface of the spacer bar 1 opposite to the front surface 11. The spacer bar 1 is made of a metal material, which provides it with the ductility for bending.

[0012] The spacer bar 1 is placed in a horizontal direction with its front surface 11 facing downwards in the direction of gravity. When the front surface 11 of the spacer bar 1 faces downwards in the direction of gravity, it is important to ensure that the desiccants 14 is evenly distributed along the horizontal direction inside the interior of the spacer bar 1. This ensures that during subsequent bending of the spacer bar 1, there will not be an excessive concentration of desiccants 14 at any local area, which could otherwise lead to cracking, tearing, irregularities, or excessive wrinkling during the bending process.

[0013] Further, to achieve better uniform distribution of the desiccants 14 inside the spacer bar 1 along the horizontal direction inside the spacer bar 1, the following steps may be specifically adopted: Step S201: placing the spacer bar 1 completely vertically to allow the desiccants 14 inside the spacer bar 1 to fall to a lower part of the spacer bar 1.

[0014] In this step, FIG. 4 is a schematic diagram showing that a sealed-filler-type spacer bar for an insulating glass unit is placed completely in a vertical direction according to an embodiment of the present disclosure. As shown in FIG. 4, the spacer bar 1 may be placed completely vertically, for example, the end B is oriented in a forward direction, so that all the desiccants 14 inside the spacer bar 1 fall to the end B.

[0015] Step S202: rotating the spacer bar 1 from the vertical direction to a position where an angle between it and the horizontal direction is equal to an angle of repose of the desiccants 14, to allow the desiccants 14 to flow freely until the desiccants 14 are evenly distributed inside the spacer bar 1 between the opposite ends of the spacer bar 1, during this process, the front surface 11 of the spacer bar 1 faces downwards, and the back surface 12 of the spacer bar 1 faces upwards.

[0016] In this step, the spacer bar 1 is rotated from the vertical direction to a position where an angle between it and the horizontal direction is equal to an angle of repose Y of the desiccants 14. FIG. 5 is a schematic diagram showing that a sealed-filler-type spacer bar for an insulating glass unit is rotated to a position where an angle between the spacer bar 1 and the horizontal direction is equal to an angle of repose of the desiccants according to an embodiment of the present disclosure. As shown in FIG. 5, in this process, the spacer bar 1 is rotated from the vertical direction towards a side of the front face 11, until the end A of the spacer bar 1 faces downwards and the end B faces upwards, and an angle between the spacer bar 1 and the horizontal direction is equal to an angle of repose of the desiccants 14. In this process, the desiccants 14 flow freely until they are evenly distributed inside the spacer bar 1 between the opposite ends of the spacer bar 1, and once evenly distributed, the desiccants 14 remain stable and do not continue to flow downward. During the above rotation process, the desiccants 14 will inevitably flow towards the lower end until they are evenly distributed along the front surface 11. However, for the vibration methods in the prior art, the initial distribution of the desiccants 14 in the interior of an inner spacer bar is uncertain, and the magnitude and amplitude of motion of the desiccants during reciprocating vibration are also uncertain, leading to an unpredictable final distribution of the desiccants; since the distribution of the desiccants 14 inside the spacer bar cannot be detected, this may result in one end of the sealed-filler-type spacer bar 1 having more desiccants 14, while the other end has fewer. Further, the desiccant 14 may be spherical, and correspondingly, the angle of repose of the spherical desiccant 14 may generally in a range between 18 degrees and 40 degrees.

[0017] Step S203: rotating the spacer bar 1 to be placed in the horizontal direction after the desiccants 14 freely flow and are evenly distributed between the opposite ends of the spacer bar 1 inside the spacer bar 1.

[0018] In the above step, FIG. 6 is a schematic diagram showing that a sealed-filler-type spacer bar for an insulating glass unit is matched with a first bending tool and a second bending tool 3 before bending according to an embodiment of the present disclosure. As shown in FIG. 6, after the desiccants 14 freely flow and are evenly distributed between the opposite ends of the spacer bar 1 inside the spacer bar 1, the spacer bar 1 is rotated towards the front surface 11, that is, the end A of the spacer bar 1 is raised and the end B of the spacer bar 1 is lowered, until the spacer bar 1 is rotated be placed in the horizontal direction.

[0019] In another feasible embodiment, to achieve better uniform distribution of the desiccants 14 inside the spacer bar 1 along the horizontal direction inside the spacer bar 1, the following steps may be specifically adopted: Step S301: placing the spacer bar 1 completely horizontally, with the front surface of the spacer bar 1 facing downwards and the back surface of the spacer bar 1 facing upwards.

[0020] The spacer bar 1 is placed on a rotating frame that can rotate around its center in a vertical plane.

[0021] Step S302: rotating, after the spacer bar 1 is placed completely in the horizontal direction, the spacer bar 1 in a vertical plane by a third preset angle in a first rotation direction, then rotating the spacer bar 1 by a fourth preset angle in a second rotation direction, and thereafter rotating the spacer bar 1 by a fifth preset angle in the first rotation direction, where the first rotation direction is opposite to the second rotation direction, the fourth preset angle is twice the third preset angle, the third preset angle is in a range of the angle of repose of the desiccants 14 to the angle of repose of the desiccants 14 plus two degrees, and the fifth preset angle is in a range of the third preset angle plus the angle of repose of the desiccants 14 minus two degrees to the third preset angle plus the angle of repose of the desiccants 14.

[0022] Due to the complete horizontal placement of the spacer bar 1 in step S301, the desiccants 14 within the spacer bar 1 are initially present at both ends of the spacer bar 1 but distributed unevenly overall. In the above step, by rotating the rotating frame, the spacer bar 1 is rotated in a vertical plane by a third preset angle in a first rotation direction and then is rotated by a fourth preset angle in a second rotation direction, thus quickly and effectively achieving a more uniform distribution of the desiccants 14 between the opposite ends of the spacer bar 1., and this method is faster in achieving the desired uniformity compared with the previous method. When the third preset angle and / or the fourth preset angle are selected to be slightly larger than the angle of repose of the desiccants 14, the desiccants 14 can flow slightly faster in the spacer bar without causing excessive downward flow of the desiccants, generally making the desiccants 14 uniformly distributed along the front surface 11. Thereafter the spacer bar 1 is rotated by a fifth preset angle in the first rotation direction. Feasibly, since the third preset angle and / or the fourth preset angle are selected to be slightly larger than the angle of repose of the desiccants 14, the downward inertia during the flow of the desiccants 14 will lead to a slight accumulation of desiccant 14 at the bottom of the spacer bar 1. Taking into account the inertia of the desiccants 14 during rotation, the fifth preset angle may be set slightly less than the sum of the third preset angle and the angle of repose of the desiccants 14, so as to minimize the downward inertia of the desiccants 14 and to make the desiccants 14 evenly distributed along the front surface 11 as far as possible after the final downward flow of the desiccants 14.

[0023] Step S303: afterwards rotating the spacer bar 1 to a horizontal state by a rotating frame.

[0024] Step S102: measuring a first bending distance X from an end B toward an end A of the spacer bar 1 to determine a first bending point on the front surface 11 of the spacer bar 1, placing an abutting end 21 of a first bending tool 2 against the first bending point on the front surface 11 of the spacer bar 1, and placing a first rotating member 31 and a second rotating member 32 of a second bending tool 3 against a back surface 12 of the spacer bar 1, where a rotating shaft connected to the first rotating member 31 and the second rotating member 32 of the second bending tool 3 is located on a side of the first bending point that is close to the end B in the horizontal direction, and the second rotating member 32 is closer to the end B of the spacer bar 1 than the first rotating member 31.

[0025] In this step, since the entire spacer bar 1 needs to be bent multiple times, as shown in FIG. 6, the first bending distance from an end B toward an end A of the spacer bar 1 is measured to determine a first bending point on the front surface 11 of the spacer bar 1, and the first bending point is the position closest to the end B where a bend needs to be made. The abutting end 21 of the first bending tool 2 is placed against a position of the first bending point on the front surface 11 of the spacer bar 1. The outer contour of the cross section of the abutting end 21 of the first bending tool 2 may be circular arc-shaped, so that the front surface 11 of the spacer bar 1 is less prone to cracking, tearing, or irregularity at the bending part during bending, and the bending part gradually changes into an arc shape to ultimately achieve bending. The first rotating member 31 and the second rotating member 32 of the second bending tool 3 are placed against the back surface 12 of the spacer bar 1, and the side surfaces of the first rotating member 31 and the second rotating member 32 that are in contact with the back surface 12 are completely flat. The opposite ends of the first rotating member 31 and the second rotating member 32 are hinge-connected to allow for relative rotation between the two members. The rotating shaft connected to the first rotating member 31 and the second rotating member 32 of the second bending tool 3 is located on a side of the first bending point that is close to the end B in the horizontal direction, and the second rotating member 32 is closer to the end B of the spacer bar 1 than the first rotating member 31.

[0026] Further, due to the current national standards, the thickness between the front surface 11 and the back surface 12 of the spacer bar 1 needs to be between 6.5 ± 0.15 mm (between 6.35 and 6.65 mm). Therefore, correspondingly, the distance between the rotating shaft connected to the first rotating member 31 as well as the second rotating member 32 of the second bending tool 3 and the abutting end 21 of the first bending tool 2 in the horizontal direction is between 5 mm and 50 mm. The distance can specifically be determined based on the radius by which the spacer bar 1 is bent at the first bending point. The larger the bending radius is, the greater the distance between the rotating shaft connected to the first rotating member 31 as well as the second rotating member 32 of the second bending tool 3 and the abutting end 21 of the first bending tool 2 in the horizontal direction is. Of course, the larger the bending radius is, the larger the radius of the arc-shaped outer contour of the cross section of the abutting end 21 of the first bending tool 2 is.

[0027] To ensure the bending effect and avoid adverse consequences such as cracking and tearing of the bent part of the spacer bar 1 after bending, the distance between the rotating shaft connected to the first rotating member 31 as well as the second rotating member 32 of the second bending tool 3 and the abutting end 21 of the first bending tool 2 in the horizontal direction should be at least 5 mm.

[0028] Step 103: moving the abutting end 21 of the first bending tool 2 towards a first direction by a first preset distance to cause the front surface 11 of the spacer bar 1 at the first bending point to be recessed inwardly, and at the same time, rotating the second rotating member 32 towards a bending direction by a first preset angle to cause the end B of the spacer bar 1 to sag, which allows the desiccants 14 on the side of the first bending point of the spacer bar 1 that is close to the end B to fall towards the end B of the spacer bar 1, leaving no desiccant inside the spacer bar 1 at the first bending point.

[0029] In this step, FIG. 7 is a schematic diagram showing that a sealed-filler-type spacer bar for an insulating glass unit is bent by a first preset angle according to an embodiment of the present disclosure. As shown in FIG. 7, the abutting end 21 of the first bending tool 2 is moved towards a first direction by a first preset distance, so that the front surface 11 of the spacer bar 1 at the first bending point is inwardly recessed, the end B of the spacer bar 1 to be more easily bent to the side of the front surface 11. Further, exemplarily, the angle between the first direction and the horizontal direction may be within a range of 20 to 70 degrees (45 ± 25 degrees), which ensures that the inward depression of the front surface 11 of the spacer bar 1 at the first bending point is balanced on both sides, thus avoiding the depression from being overly biased towards one side, which could otherwise result in excessive wrinkling or irregularities on the biased side, and over-extension on the other side, that will easily lead to tearing. More exemplarily, the angle between the first direction and the horizontal direction may be within a range of 40 to 50 degrees (45 ± 5 degrees).

[0030] Meanwhile, as shown in FIG. 7, the second rotating member 32 presses against the back surface 12 of the spacer bar 1 and rotates by the first preset angle in the bending direction to cause the end B of the spacer bar 1 to sag, so that the desiccants 14 on the side of the first bending point of the spacer bar 1 that is close to the end B falls towards the end B of the spacer bar 1, such that there is no desiccant at the first bending point inside the spacer bar 1. The first preset angle needs to be greater than the angle of repose of the desiccants 14, so that the desiccants 14 can fall towards the end B. The first preset angle is less than the final target angle at which the spacer bar 1 is ultimately bent. Further, in order to accelerate the desiccants 14 to fall into the end B of the spacer bar 1, appropriate vibrations may be applied to the spacer bar 1 during the bending process, thereby improving the bending efficiency.

[0031] In this step, since it involves the initial bending of the spacer bar 1, the first preset distance may be controlled to be within 10% to 30% of the thickness between the front surface 11 and the back surface 12 of the spacer bar 1. It is not necessary to move the abutting end 21 of the first bending tool 2 excessively towards the first direction at one time, otherwise it may cause tearing or irregularity at the recess of the front surface 11 of the spacer bar 1.

[0032] Through the above process, the desiccants 14 at the first bending point inside the spacer bar 1 all fall to the end B, so that there is no desiccant 14 between the front surface 11 and the back surface 12 at the first bending point inside the spacer bar 1. In the later stage, when performing large-angle bends on the spacer bar 1, the absence of desiccants 14 at the first bending point allows for large-angle bending without hindering, which significantly reduces cracking, tearing, irregularities, or excessive wrinkling at the bent part of the spacer bar 1.

[0033] Step S104: moving the abutting end 21 of the first bending tool 2 further towards the first direction by a second preset distance to cause the front surface 11 of the spacer bar 1 at the first bending point to be further recessed inwardly, and at the same time, rotating the second rotating member 32 further towards the bending direction by a second preset angle to bend the spacing bar 1 to a target angle.

[0034] In this step, all the desiccants 14 on the side of the first bending point of the spacer bar 1 that is close to the end B fall into the end B of the spacer bar 1, and there is basically no desiccant 14 between the front surface 11 and the back surface 12 at the first bending point inside the spacer bar 1. FIG. 8 is a schematic diagram showing that a sealed-filler-type spacer bar for an insulating glass unit is further bent by a second preset angle according to an embodiment of the present disclosure. As shown in FIG. 8, the abutting end 21 of the first bending tool 2 is continued to move towards the first direction by a second preset distance, so that the front surface 11 of the spacer bar 1 at the first bending point continues to be inwardly recessed. The sum of the second preset distance and the first preset distance may be controlled to be within 40% and 80% of the thickness between the front surface 11 and the back surface 12 of the spacer bar 1, which not only ensures the bending effect but also avoids tearing caused by excessive indentation on the front surface 11 of the spacer bar 1.

[0035] Meanwhile, as shown in FIG. 8, the second rotating member 32 rotates in the bending direction further by a second preset angle to bend the spacing bar 1 to a target angle. For example, for a typical rectangular insulating glass unit, the target angle is equal to the sum of the second preset angle and the first preset angle, i.e., the target angle is 90 degrees. Of course, in other feasible embodiments, the target angle may also be other angles, but it generally needs to be greater than the angle of repose of the desiccants 14. If the target angle is too small, it is possible to bend the spacer bar 1 directly without utilizing the bending method for a sealed-filler-type spacer bar for an insulating glass unit in the present application.

[0036] In this step, since there is no desiccant 14 between the front surface 11 and the back surface 12 at the first bending point inside the spacer bar 1, when the spacer bar 1 is bent at a large angle, the absence of desiccants 14 at the first bending point allows for large-angle bending without hindering. After the spacer bar 1 is completely bent to the target angle, the entire bent part can achieve a more aesthetically pleasing appearance, greatly reducing the risk of problems like cracking, tearing, irregularities, or excessive wrinkling.

[0037] Afterwards, if the spacer bar 1 needs to be bent multiple times, a second bending distance from the end B toward the end A of the spacer bar 1 is measured to determine a second bending point on the front surface 11 of the spacer bar 1, and the second bending point is farther from the end B compared to the first bending point. By repeating steps S102 to S104 and sequentially determining the bending points from the end B towards the end A, it can ensure that there are desiccants 14 evenly distributed in regions between adjacent bending points, near the end B, and near the end A inside the spacer bar 1. Even if the bending degree of the bending point is large and the desiccants 14 cannot pass through the bending points, no local region inside the spacer bar 1 will lack desiccant 14.

[0038] According to the bending method for a sealed-filler-type spacer bar for an insulating glass unit in the present application, firstly, the desiccants 14 inside the spacer bar 1 are processed to be evenly distributed along the horizontal direction with the front surface 11 of the spacer bar 1 facing downwards in the direction of gravity, afterwards, the spacer bar is preliminarily bent at the position of the first bending point, so that the front surface 11 at the first bending point is inwardly recessed, and the end B of the spacer bar 1 sags at the first preset angle, allowing the desiccants 14 on a side of the first bending point of the spacer bar 1 that is close to the end B to fall towards the end B of the spacer bar 1, in this way, the desiccants 14 at the first bending point are removed. Afterwards, at the first bending point, the abutting end 21 of the first bending tool 2 is further moved towards the first direction by a second preset distance, so that the front surface 11 of the spacer bar 1 at the first bending point continues to be inwardly recessed, and the spacer bar 1 is fully bent to the target angle, during this process, due to the absence of desiccants 14 inside the spacer bar between the front surface 11 and the back surface 12 at the first bending point, there will be no desiccants 14 hindering bending of the spacer bar 1 at a large angle in the later stage, thus avoiding cracking, tearing, irregularities, or excessive wrinkling at the bent parts of the spacer bar 1. Therefore, the entire bending method of the present disclosure results in a more aesthetically pleasing bend in the spacer bar, with a significant reduction in the likelihood of defects such as cracking, tearing, irregularities, or excessive wrinkling.

[0039] The above embodiments are only preferred embodiments of the present disclosure and cannot be used to limit the scope of protection of the present disclosure. Any non-essential changes and substitutions made by those skilled in the art on the basis of the present disclosure are within the scope of protection claimed by the present disclosure.

Claims

1. A bending method for a sealed-filler-type spacer bar for an insulating glass unit, comprising: placing the spacer bar in a horizontal direction with its front surface facing downwards in a direction of gravity, and evenly distributing desiccants inside the spacer bar in the horizontal direction along interior of the spacer bar; measuring a first bending distance from an end B toward an end A of the spacer bar to determine a first bending point on the front surface of the spacer bar, placing an abutting end of a first bending tool against the first bending point on the front surface of the spacer bar, and placing a first rotating member and a second rotating member of a second bending tool against a back surface of the spacer bar, wherein a rotating shaft connected to the first rotating member and the second rotating member of the second bending tool is located on a side of the first bending point that is close to the end B in the horizontal direction, and the second rotating member is positioned closer to the end B of the spacer bar than the first rotating member; moving the abutting end of the first bending tool towards a first direction by a first preset distance to cause the front surface of the spacer bar at the first bending point to be recessed inwardly, and at the same time, rotating the second rotating member towards a bending direction by a first preset angle to cause the end B of the spacer bar to sag, which allows the desiccants on the side of the first bending point of the spacer bar that is close to the end B to fall towards the end B of the spacer bar, leaving no desiccant inside the spacer bar at the first bending point; and moving the abutting end of the first bending tool further towards the first direction by a second preset distance to cause the front surface of the spacer bar at the first bending point to be further recessed inwardly, and at the same time, rotating the second rotating member further towards the bending direction by a second preset angle to bend the spacing bar to a target angle.

2. The bending method for a sealed-filler-type spacer bar for an insulating glass unit according to claim 1, wherein the step of placing the spacer bar in the horizontal direction with its front surface facing downwards in the direction of gravity, and evenly distributing the desiccants inside the spacer bar in the horizontal direction along interior of the spacer bar comprises: placing the spacer bar completely in a vertical direction to allow the desiccants inside the spacer bar to fall to a lower part of the spacer bar; rotating the spacer bar from the vertical direction to a position where an angle between it and the horizontal direction is equal to an angle of repose of the desiccants, to allow the desiccants to flow freely until the desiccants are evenly distributed inside the spacer bar between the opposite ends of the spacer bar, during which the front surface of the spacer bar faces downwards, and the back surface of the spacer bar faces upwards; and rotating the spacer bar to be placed in the horizontal direction after the desiccants freely flow and are evenly distributed between the opposite ends of the spacer bar inside the spacer bar.

3. The bending method for a sealed-filler-type spacer bar for an insulating glass unit according to claim 1, wherein the step of placing the spacer bar in the horizontal direction with its front surface facing downwards in the direction of gravity, and evenly distributing the desiccants inside the spacer bar in the horizontal direction along interior of the spacer bar comprises: placing the spacer bar completely in the horizontal direction, with the front surface of the spacer bar facing downwards and the back surface of the spacer bar facing upwards; rotating, after the spacer bar is placed completely in the horizontal direction, the spacer bar in a vertical plane by a third preset angle in a first rotation direction, then rotating the spacer bar by a fourth preset angle in a second rotation direction, and thereafter rotating the spacer bar by a fifth preset angle in the first rotation direction, wherein the first rotation direction is opposite to the second rotation direction, the fourth preset angle is twice the third preset angle, the third preset angle is in a range of the angle of repose of the desiccants to the angle of repose of the desiccants plus two degrees, and the fifth preset angle is in a range of the third preset angle plus the angle of repose of the desiccants minus two degrees to the third preset angle plus the angle of repose of the desiccants; and then rotating the spacer bar to a horizontal state.

4. The bending method for a sealed-filler-type spacer bar for an insulating glass unit according to claim 2 or 3, wherein the desiccant is spherical, and the angle of repose is in a range of 18 degrees to 40 degrees.

5. The bending method for a sealed-filler-type spacer bar for an insulating glass unit according to claim 1, wherein a distance between the rotating shaft and the abutting end of the first bending tool in the horizontal direction is in a range of 5 mm to 50 mm, and a thickness between the front surface and the back surface of the spacer bar is between 6.5 ± 0.15 mm.

6. The bending method for a sealed-filler-type spacer bar for an insulating glass unit according to claim 1, wherein the first preset angle is greater than an angle of repose of the desiccants.

7. The bending method for a sealed-filler-type spacer bar for an insulating glass unit according to claim 1, wherein the target angle is equal to the sum of the second preset angle and the first preset angle, and the target angle is 90 degrees.

8. The bending method for a sealed-filler-type spacer bar for an insulating glass unit according to claim 1, wherein an angle between the first direction and the horizontal direction is between 45 ± 25 degrees.

9. The bending method for a sealed-filler-type spacer bar for an insulating glass unit according to claim 1, wherein the spacer bar is made of a metal material.

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