Curved glass forming mold

Abstract

The application discloses a curved glass forming die, which comprises a bottom frame, a die body and a horizontal driving assembly; the die body comprises a fixed part and a movable part; the two ends of the fixed part are hingedly connected with a movable part respectively; the fixed part is connected with the bottom frame; the movable part is in transmission connection with the horizontal driving assembly; the horizontal driving assembly can adjust the distance between the movable part and the bottom frame; when the distance between the end of the movable part far from the fixed part and the bottom frame is the largest, a smooth transition forming curved surface is formed between the movable part and the fixed part. Through the cooperation between the horizontal driving assembly, the fixed part and the movable part, the horizontal movement generated by the horizontal driving assembly can be converted into the circular movement of the movable part, so that the movable part is effectively driven to adjust the arch height, the design can avoid the extension of the equipment in the longitudinal direction, and the lifting height of the movable parts on the two sides can be directly compared through the displacement amount of the horizontal driving assembly, so that the precision of the product is ensured.

Description

Technical Field

[0001] This invention belongs to the field of glass forming technology, and specifically relates to a bending glass forming mold. Background Technology

[0002] With the diversification of product designs, the variety of horizontal tempering furnaces is increasing. As a result, the pressing and forming process has also attracted much attention. Traditional glass manufacturing processes involve creating molds based on the shape of the glass. After the glass exits the furnace, it is pressed using equipment and the molds to form a semi-finished product with a certain arch height. Finally, tempering completes the process of creating tempered glass with this arch height.

[0003] However, this type of mold is only suitable for producing products with an arch height of less than 200mm. For products with a larger arch height, it is impossible to achieve horizontal pressing and forming using traditional molds. If traditional molds are used for processing large arch heights, it is also easy to spend more time on the pressing action due to the long pressing stroke of the convex and concave dies. As the pressing time increases, heat loss also increases. Therefore, it is necessary to increase the temperature of the glass when it comes out of the furnace to compensate for the heat loss during the pressing process, or to use greater air pressure to temper the glass in the subsequent tempering process. This will not only affect the glass production efficiency, but also indirectly increase the energy consumption in the manufacturing process.

[0004] To address the aforementioned issues, Chinese utility model patent CN215592925U discloses a glass forming die assembly, a glass forming mold, and a glass tempering forming device. This device includes: a first fixed part mounted on a support frame and two first movable parts respectively connected to both ends of the first fixed part, the two movable parts being hinged to the first fixed part; and a first adjusting member mounted on the support frame, one end of the first adjusting member facing away from the support frame connected to the other end of the first movable part facing away from the first fixed part, the first adjusting member driving the first movable part to rotate relative to the first fixed part. This device ensures that the tempering furnace can process tempered glass with larger curvatures, thereby improving the quality of tempered glass products.

[0005] However, in actual use, it has been found that this type of maintenance device still has the following shortcomings:

[0006] 1) The first movable part of the die is directly driven by the cylinder structure. Therefore, it is difficult to determine whether the extension of the cylinders on both sides is consistent during operation. As a result, it is not possible to ensure the synchronicity of the first movable parts on both sides during the lifting process. This causes the high arch product to have edge waves, large edge stress differences and is prone to tempering and bursting due to the pressing time difference between the sides and the middle.

[0007] 2) When processing glass with a large arch, the lifting range of the first movable part needs to be larger. Since the concave mold uses a cylinder to directly drive the lifting of the first movable parts on both sides, the stroke of the cylinder will also increase, which will indirectly increase the occupancy rate of the longitudinal space of the equipment. Summary of the Invention

[0008] The technical problem to be solved by this invention is: how to provide a concave mold that can both observe the bending synchronization when the two sides of a large arch glass are pressed, and effectively compress the longitudinal space.

[0009] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows:

[0010] A curved glass forming mold includes a base frame, a die body, and a horizontal drive assembly;

[0011] The die body includes a fixed part and a movable part;

[0012] The two ends of the fixed part are respectively hinged to one of the movable parts;

[0013] The fixing part is connected to the bottom frame;

[0014] The movable part is connected to the horizontal drive assembly in a transmission manner;

[0015] The horizontal drive component can adjust the distance between the movable part and the bottom frame;

[0016] When the distance between the end of the movable part away from the fixed part and the bottom frame is at its maximum, a smoothly transitioning shaped curved surface is formed between the movable part and the fixed part.

[0017] The beneficial effects of the present invention are as follows: The curved glass forming mold provided by the present invention can convert the horizontal motion generated by the horizontal drive component into the circular motion of the movable part through the cooperation between the horizontal drive component, the fixed part and the movable part, thereby effectively driving the movable part to adjust the arch height. This design can not only avoid the longitudinal extension of the equipment, but also intuitively compare the lifting height of the movable parts on both sides through the displacement of the horizontal drive component, thereby ensuring the accuracy of the product. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the bending glass forming mold in this invention;

[0019] Figure 2 for Figure 1 A magnified view of point A;

[0020] Label Explanation:

[0021] 1. Base frame;

[0022] 2. Die body; 21. Fixing part; 211. Fixing frame; 22. Movable part; 23. First support frame; 24. Second support frame; 25. Connecting piece; 26. Vent hole;

[0023] 3. Horizontal drive assembly; 31. Drive component; 311. Cylinder; 312. Connecting rod; 32. Rack; 33. Drive shaft; 34. Second gear; 35. Limiting rod;

[0024] 4. First gear. Detailed Implementation

[0025] To explain in detail the technical content, objectives, and effects of the present invention, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0026] The existing die uses a first adjusting component to drive the first movable part to rotate relative to the first fixed part, thereby ensuring the tempering furnace can process tempered glass with a large curvature, thus improving the quality of tempered glass products. However, in actual use, it has been found that this type of maintenance device cannot guarantee the synchronicity of the first movable parts on both sides during the lifting and lowering process. This results in products with large arch heights exhibiting edge wavy patterns, large differences in edge stress, and a tendency to break during tempering due to the time difference between the two sides and the middle. Moreover, when processing glass with large arch heights, a larger lifting and lowering range of the first movable part is required. Since the die uses a cylinder to directly drive the lifting and lowering of the first movable parts on both sides, the stroke of the cylinder will also increase, which will indirectly increase the occupancy rate of the longitudinal space of the equipment.

[0027] Based on this, please refer to Figures 1 to 2 A curved glass forming mold is proposed, comprising a base frame 1, a concave mold body 2, and a horizontal drive assembly 3; the concave mold body 2 includes a fixed part 21 and a movable part 22; both ends of the fixed part 21 are respectively hinged to a movable part 22; the fixed part 21 is connected to the base frame 1; the movable part 22 is connected to the horizontal drive assembly 3; the horizontal drive assembly 3 can adjust the distance between the movable part 22 and the base frame 1, that is, the end of the movable part 22 away from the fixed part 21; when the distance between the end of the movable part 22 away from the fixed part 21 and the base frame 1 is the largest, a smoothly transitioning forming surface is formed between the movable part 22 and the fixed part 21.

[0028] It is understood that the curved glass forming mold of the present invention, through the cooperation between the horizontal drive component 3, the fixed part 21 and the movable part 22, can convert the horizontal motion generated by the horizontal drive component 3 into the circular motion of the movable part 22, thereby effectively driving the movable part 22 to adjust the arch height. This design can not only avoid the longitudinal extension of the equipment, but also intuitively compare the lifting height of the movable parts 22 on both sides through the displacement of the horizontal drive component 3, thereby ensuring the accuracy of the product.

[0029] In some embodiments, the arch height of the formed curved surface is greater than or equal to 200 mm. Preferably, the arch height of the formed curved surface is greater than or equal to 300 mm. The cooperation between the movable part 22 and the fixed part 21 enables the forming mold to provide structural support for glass processing with large arch heights.

[0030] In some embodiments, the movable part 22 at any end of the fixed part 21 is provided with first gears 4 on both sides; the horizontal drive assembly 3 synchronously drives the two first gears 4 to move the movable part 22; the horizontal drive assembly 3 includes a drive member 31, a rack 32 and a drive shaft 33 that is connected to the drive member 31; the two ends of the drive shaft 33 are provided with second gears 34; the rack 32 is slidably connected to the bottom frame 1; the first gears 4 and the second gears 34 are both meshed with the rack 32. This design provides structural support for the horizontal drive member 31 to effectively drive the movable part 22 to perform a folding action. By driving the drive shaft 33 to rotate through the drive member 31, the second gears 34 at both ends of the drive shaft 33 can be indirectly driven to rotate, thereby driving the rack 32 to move along its own length direction. In the process of the rack 32 moving, the first gears 4 can also rotate synchronously with the second gears 34 to achieve the effect of driving the movable part 22 to fold.

[0031] In some embodiments, drive slide rails are also provided at both ends of the drive shaft 33; the drive slide rails are slidably connected to the base frame 1; and racks 32 are connected to the drive slide rails. Specifically, there are two racks 32, and each rack 32 meshes with the first gear 4 and the second gear 34 respectively. This design, by mounting two racks 32 on the drive slide rails to drive the first gear 4 and the second gear 34 to rotate respectively, allows for the replacement of individual components when damage is found during subsequent maintenance, thereby effectively saving maintenance costs.

[0032] In some embodiments, the drive member 31 includes a cylinder 311 and a connecting rod 312; the fixed end of the cylinder 311 is hinged to the bottom frame 1; one end of the connecting rod 312 is hinged to the movable end of the cylinder 311, and the other end is fixedly connected to the drive shaft 33. Further defining the structure of the drive member 31, the linear motion of the cylinder 311 can be converted into the rotation of the drive shaft 33 around its axis by driving the connecting rod 312 with the cylinder 311, thereby reliably achieving the folding operation of the movable part 22 without increasing the longitudinal space occupancy.

[0033] In some embodiments, a limiting rod 35 is provided on the moving path of the movable end of the cylinder 311; the drive shaft 33 is located between the limiting rod 35 and the cylinder 311. The limiting rod 35 can prevent the second gear 34 from separating from the rack 32 due to the rotation angle of the drive shaft 33 exceeding the design requirements, thereby affecting the normal operation of the equipment.

[0034] In some embodiments, the fixing part 21 includes two fixing brackets 211 disposed opposite to each other on the bottom frame 1; the same end face of the two fixing brackets 211 is disposed opposite to both ends of the movable part 22; a gap is left between the end face of the fixing bracket 211 and the end face of the movable part 22; the top surface of the fixing part 21 has a first arc surface; the top surface of the movable part 22 has a second arc surface; when the distance between the end of the movable part 22 away from the fixing part 21 and the bottom frame 1 is the largest, the first arc surface and the second arc surface form a shaped curved surface, and the area of ​​the shaped curved surface is the largest. This design further defines the structure between the fixing part 21 and the movable part 22; and ensures that the gap between the fixing part 21 and the movable part 22 allows the movable part 22 to achieve a smoother flipping action.

[0035] In some embodiments, the die body 2 further includes a first support frame 23 and a second support frame 24; the first support frame 23 is disposed on the side of the fixed part 21 away from the bottom frame 1; the second support frame 24 is disposed on the side of the movable part 22 away from the bottom frame 1; the shape of the first support frame 23 is consistent with the shape of the fixed part 21; the shape of the second support frame 24 is consistent with the shape of the movable part 22; both the first support frame 23 and the second support frame 24 are connected to the fixed part 21 and the movable part 22 respectively through adjustable length connectors 25; a gap is left between the first support frame 23 and the fixed part 21; a gap is left between the second support frame 24 and the movable part 22; ventilation holes are evenly distributed on the support surface of the first support frame 23 and the support surface of the second support frame 24. Specifically, the shape of the ventilation holes can be teardrop-shaped, elliptical, or circular, etc. The curved frame provides structural support for the equipment to manufacture high-arch tempered glass. A support frame is connected to one side of the frame via connector 25, and the distance between the support frame and the frame can be adjusted by connector 25 to separate them. This allows air to flow efficiently over the glass surface during the subsequent tempering process. Furthermore, the ventilation holes on the support frame further increase the contact area between the glass edge and the air, thus ensuring uniform tempering of the glass and preventing excessive edge stress, which could affect the quality of the glass.

[0036] In some embodiments, when the movable part 22 is in its initial state, i.e., the end of the movable part 22 away from the fixed part 21 is at its lowest point, the highest point of the first gear 4 and the highest point of the second gear 34 are both lower than the highest points of the fixed part 21 and the movable part 22. By ensuring that the first gear 4 and the second gear 34 have optimal dimensions, limiting the highest points of both the first gear 4 and the second gear 34 to be lower than the highest point of the die cavity, it is possible to avoid the glass to be processed from being scrapped due to friction between the glass surface and the first gear 4 or the second gear 34 when passing over the die cavity, thus preventing dents or undesirable marks and avoiding glass scrapping, which indirectly increases manufacturing costs.

[0037] Please refer to Figures 1 to 2Embodiment 1 of the present invention is as follows:

[0038] A curved glass forming mold includes a base frame 1, a die body 2, and a horizontal drive assembly 3. The die body 2 includes a fixed part 21 and a movable part 22. Both ends of the fixed part 21 are hinged to a movable part 22. The fixed part 21 is connected to the base frame 1. The movable part 22 is connected to the horizontal drive assembly 3. The horizontal drive assembly 3 can adjust the distance between the movable part 22 and the base frame 1, i.e., the end of the movable part 22 away from the fixed part 21. When the distance between the end of the movable part 22 away from the fixed part 21 and the base frame 1 is the largest, a smoothly transitioning forming surface is formed between the movable part 22 and the fixed part 21.

[0039] In this embodiment, the arch height of the formed curved surface is equal to 300mm.

[0040] In this embodiment, the movable part 22 at any end of the fixed part 21 is provided with first gears 4 on both sides; the horizontal drive assembly 3 synchronously drives the two first gears 4 to move the movable part 22; the horizontal drive assembly 3 includes a drive member 31, a rack 32 and a drive shaft 33 that is connected to the drive member 31; the two ends of the drive shaft 33 are provided with second gears 34; the rack 32 is slidably connected to the bottom frame 1; the first gears 4 and the second gears 34 are both meshed with the rack 32.

[0041] In this embodiment, drive slide rails are provided at both ends of the drive shaft 33; the drive slide rails are slidably connected to the bottom frame 1; and the rack 32 is connected to the drive slide rails. Specifically, there are two racks 32, and each rack 32 meshes with the first gear 4 and the second gear 34 respectively.

[0042] In this embodiment, the driving component 31 includes a cylinder 311 and a connecting rod 312; the fixed end of the cylinder 311 is hinged to the bottom frame 1; one end of the connecting rod 312 is hinged to the movable end of the cylinder 311, and the other end is fixedly connected to the drive shaft 33.

[0043] In this embodiment, a limiting rod 35 is provided on the moving path of the movable end of the cylinder 311; the drive shaft 33 is located between the limiting rod 35 and the cylinder 311.

[0044] In this embodiment, the fixing part 21 includes two fixing brackets 211 that are disposed opposite to each other on the bottom frame 1; the same side end face of the two fixing brackets 211 is disposed opposite to the two ends of the movable part 22; a gap is left between the end face of the fixing bracket 211 and the end face of the movable part 22; the top surface of the fixing part 21 has a first arc surface; the top surface of the movable part 22 has a second arc surface; when the distance between the end of the movable part 22 away from the fixing part 21 and the bottom frame 1 is the largest, the first arc surface and the second arc surface form a shaped curved surface, and the area of ​​the shaped curved surface is the largest.

[0045] In this embodiment, the concave mold body 2 further includes a first support frame 23 and a second support frame 24. The first support frame 23 is disposed on the side of the fixed part 21 away from the bottom frame 1; the second support frame 24 is disposed on the side of the movable part 22 away from the bottom frame 1. The shape of the first support frame 23 is consistent with the shape of the fixed part 21; the shape of the second support frame 24 is consistent with the shape of the movable part 22. Both the first support frame 23 and the second support frame 24 are connected to the fixed part 21 and the movable part 22 respectively through adjustable length connectors 25. A gap is left between the first support frame 23 and the fixed part 21; a gap is left between the second support frame 24 and the movable part 22; teardrop-shaped ventilation holes are evenly distributed on the support surface of the first support frame 23 and the support surface of the second support frame 24. Specifically, the outer periphery of the support frame is also covered with a high-temperature resistant and breathable woven sleeve, thereby allowing a gap between the glass and the support, which further increases the contact area between the glass surface and the wind during the tempering process.

[0046] In this embodiment, when the movable part 22 is in the initial state, that is, when the end of the movable part 22 away from the fixed part 21 is at the lowest point, the highest point of the first gear 4 and the highest point of the second gear 34 are both lower than the highest points of the fixed part 21 and the movable part 22.

[0047] The working principle of this invention is as follows:

[0048] Non-working state: Since the frame formed by the fixed part 21 and the movable part 22 has a hollow structure, the die can be effectively hidden under the roller conveyor of the glass in the non-working state to avoid affecting the glass conveying operation.

[0049] In operation: When glass requiring a large arch height is conveyed from inside the furnace to above the concave mold via roller conveyors, the concave mold is lifted by an external lifting device, thereby moving the glass towards the convex mold above it (pressing out the glass with an arch height through the space between the concave and convex molds). Since the movable part 22 is located at the lowest point of the concave mold when not in operation, the distance between the convex and concave molds is relatively smaller than that of traditional molds (where the concave mold is a fixed structure, therefore the distance between the convex and concave molds must be greater than the arch height of the glass being processed), without affecting the normal movement of the glass. The size is significantly reduced, which can effectively shorten the mold closing time of the punch and die. During the mold closing process, the cylinders 311 at both ends drive the connecting rods 312 to drive the second gears 34 at both ends of the drive shaft 33 to rotate. This causes the rack 32 on the drive slide rail to move synchronously, thereby driving the first gear 4 to rotate and lift the movable part 22. This process can further shorten the pressing time difference between the two sides and the middle of the glass, thereby avoiding the occurrence of waves on the edge and large edge stress differences caused by the different dwell time of the glass on the die, which can easily lead to tempered glass explosion.

[0050] After the mortise and tenon molds are closed and the glass is pressed, the height of the mortise mold is kept constant while the tenon mold is separated from the glass surface. At this time, the pressed glass is transferred to the subsequent tempering equipment through the mortise mold for glass tempering. Once tempering is completed, the entire manufacturing process of the large arch height tempered glass is finished.

[0051] Compared to existing molding methods, the traditional molding steps are as follows:

[0052] Glass exits the furnace — pressing with concave and convex molds — glass is sucked up by the convex mold — glass is received by the ring frame (the glass falls from the convex mold onto the ring frame) — tempering.

[0053] The forming mode performed by the die in this application is as follows:

[0054] Glass comes out of the furnace—pressed by a die—tempered.

[0055] Therefore, the die of this application directly simplifies the forming steps. The die simultaneously serves as the mold during pressing and the ring frame during tempering. The glass processing is carried out in only two steps, namely pressing and air tempering. Without shortening the tempering time and ensuring the tempering quality, only the pressing process is improved and optimized, so that the pressing of glass can be completed in an instant, thereby significantly improving the glass manufacturing efficiency.

[0056] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent modifications made based on the content of the present invention specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A bending glass forming mold, characterized in that, Includes the base frame, the die body, and the horizontal drive assembly; The die body includes a fixed part and a movable part; The two ends of the fixed part are respectively hinged to one of the movable parts; The fixing part is connected to the bottom frame; The movable part is connected to the horizontal drive assembly in a transmission manner; The horizontal drive component can adjust the distance between the movable part and the bottom frame; When the distance between the end of the movable part away from the fixed part and the bottom frame is at its maximum, a smoothly transitioning shaped curved surface is formed between the movable part and the fixed part; First gears are provided on both sides of the movable part at any end of the fixed part; The horizontal drive assembly synchronously drives the two first gears to move the movable part. The horizontal drive assembly includes a drive element, a rack, and a drive shaft that is drively connected to the drive element. The drive shaft is provided with second gears at both ends; The rack is slidably connected to the bottom frame; Both the first gear and the second gear mesh with the rack.

2. The bending glass forming mold according to claim 1, characterized in that, The arch height of the formed curved surface is greater than or equal to 200mm.

3. The bending glass forming mold according to claim 1, characterized in that, The two ends of the drive shaft are also provided with drive slide rails; The drive slide rail is slidably connected to the bottom frame; The rack is connected to the drive slide rail.

4. The bending glass forming mold according to claim 1, characterized in that, The driving component includes a cylinder and a connecting rod; The fixed end of the cylinder is hinged to the bottom frame; One end of the connecting rod is hinged to the movable end of the cylinder, and the other end is fixedly connected to the drive shaft.

5. The bending glass forming mold according to claim 4, characterized in that, A limit rod is provided on the moving path of the moving end of the cylinder; The drive shaft is located between the limiting rod and the cylinder.

6. The bending glass forming mold according to claim 1, characterized in that, The fixing part includes two fixing brackets that are arranged opposite to each other on the bottom frame; The same end face of the two fixed brackets is respectively arranged opposite to the two ends of the movable part; A gap is left between the end face of the fixed frame and the end face of the movable part; The top surface of the fixing part has a first arc surface; The top surface of the movable part has a second arc surface; When the distance between the end of the movable part away from the fixed part and the bottom frame is at its maximum, the first arc surface and the second arc surface form a shaped curved surface.

7. The bending glass forming mold according to claim 1, characterized in that, The die body also includes a first support frame and a second support frame; The first support frame is disposed on the side of the fixing part away from the bottom frame; The second support frame is located on the side of the movable part away from the bottom frame.

8. The bending glass forming mold according to claim 7, characterized in that, The shape of the first support frame is consistent with the shape of the fixing part; The shape of the second support frame is consistent with the shape of the movable part.

9. The bending glass forming mold according to claim 7, characterized in that, Both the first support frame and the second support frame are connected to the fixed part and the movable part respectively via adjustable length connectors; A gap is left between the first support frame and the fixing part; A gap is left between the second support frame and the movable part.

10. The bending glass forming mold according to claim 7, characterized in that, Both the support surface of the first support frame and the support surface of the second support frame are provided with ventilation holes.

11. The bending glass forming mold according to claim 1, characterized in that, When the moving part is in the initial state, the highest point of the first gear and the highest point of the second gear are both lower than the highest point of the die body.

Images